CN115013210B

CN115013210B - Explosion-proof diesel engine start control system

Info

Publication number: CN115013210B
Application number: CN202210675633.7A
Authority: CN
Inventors: 王继魁; 王建峰; 韩雪峰; 宋允晓; 徐孝飞; 尚玉君
Original assignee: Youluoka Shandong Mining Industry Technology Co ltd
Current assignee: Youluoka Shandong Mining Industry Technology Co ltd
Priority date: 2022-06-15
Filing date: 2022-06-15
Publication date: 2024-02-02
Anticipated expiration: 2042-06-15
Also published as: CN115013210A

Abstract

The application discloses an explosion-proof diesel engine starting control system, which comprises an explosion-proof diesel engine and an energy accumulator; the energy accumulator is connected with a liquid charging loop, a liquid supplementing loop and a starting loop; the liquid filling loop and the liquid supplementing loop are both connected to the hydraulic oil tank; the starting loop is connected with the explosion-proof diesel engine and the hydraulic starting motor; the explosion-proof diesel engine is connected with a fluid supplementing loop through a hydraulic pump; the energy accumulator is connected with the fluid supplementing loop through a one-way valve; the accumulator is connected with the starting loop through a hydraulic control one-way valve. Compared with the prior art adopting a slide valve type reversing valve, the three loops of filling, supplementing and starting can meet the start-stop control of the explosion-proof diesel engine, the hydraulic control one-way valve arranged on the starting loop can realize the program-controlled starting and the remote starting of the explosion-proof diesel engine, and the hydraulic control one-way valve and the one-way valve arranged on the supplementing loop can maintain the pressure of the energy accumulator without gradually reducing the oil pressure of the energy accumulator. The system has excellent operation characteristics and pressure maintaining performance of the energy accumulator, and is suitable for special operation environments such as narrow space, large ground height, complex road conditions and the like.

Description

Explosion-proof diesel engine start control system

Technical Field

The application relates to the technical field of hydraulic transmission, in particular to an explosion-proof diesel engine starting control system.

Background

An explosion-proof diesel engine for coal mines is an explosion-proof power device for various fixed or mobile equipment in the coal mine, for example, the explosion-proof diesel engine for coal mines can be applied to an explosion-proof diesel engine monorail crane locomotive.

In order to meet the installation requirement of an explosion-proof diesel monorail crane locomotive, the explosion-proof diesel for coal mines is generally started by adopting hydraulic pressure.

The traditional explosion-proof diesel engine hydraulic starting system adopts a manual slide valve type reversing valve to control the starting and stopping of a hydraulic starting motor. The manual slide valve type reversing valve can only be manually operated at a short distance, and when the single-rail crane of the explosion-proof diesel engine running on special road sections with large ground height, small space and the like is shut down during working or abnormal working, the explosion-proof diesel engine is difficult to restart, and the pressure of the energy accumulator is gradually reduced due to the internal leakage phenomenon of the slide valve type reversing valve. Once the pressure of the accumulator is lower than the starting required pressure value of the explosion-proof diesel engine, the accumulator is required to be charged, and the working efficiency of the monorail crane of the explosion-proof diesel engine is greatly reduced.

At present, in order to solve the problem that the pressure of an energy accumulator is gradually reduced, a manual ball valve is added between a manual slide valve type reversing valve and the energy accumulator, although the method can solve the pressure maintaining problem of the energy accumulator, the operation characteristic of the manual ball valve further aggravates the manual operation burden, the quality requirement on operators is improved, the starting and stopping operation of the power equipment of the explosion-proof diesel engine become more complicated, the operators are unfamiliar or forget the operation content, the reasons that the single-rail crane of the explosion-proof diesel engine is in special working conditions such as large ground height and narrow space can bring about small difficulty for restarting the explosion-proof diesel engine, and even other power equipment of the explosion-proof diesel engine is required to drag or rescue the power equipment of the explosion-proof diesel engine after the fault.

Disclosure of Invention

The purpose of the application is to provide an explosion-proof diesel engine start control system, under the premise of meeting the normal operation of an explosion-proof diesel engine, the pressure maintaining performance of an energy accumulator is guaranteed, the operation can be simplified, and an operator can conveniently and effectively operate the explosion-proof diesel engine start control system under various working conditions.

In order to achieve the above purpose, the present application provides an explosion-proof diesel engine start control system, which includes an explosion-proof diesel engine, an energy accumulator, a hydraulic oil tank and a hydraulic start motor for driving the explosion-proof diesel engine to operate; the energy accumulator is connected with a liquid charging loop, a liquid supplementing loop and a starting loop; the liquid filling loop and the liquid supplementing loop are both connected to the hydraulic oil tank; the starting loop is connected with the explosion-proof diesel engine and the hydraulic starting motor; the explosion-proof diesel engine is connected with a fluid supplementing loop through a hydraulic pump; the energy accumulator is connected with the fluid supplementing loop through a one-way valve; the accumulator is connected to the starting circuit through a hydraulic control one-way valve.

In some embodiments, the startup loop includes a motor control loop and a valve control loop; the motor control loop is connected with the hydraulic starting motor to realize the control of the starting and stopping of the hydraulic starting motor; the valve control loop is connected with a valve control oil cylinder of the explosion-proof diesel engine so as to control the valve control oil cylinder to start and stop; the motor control loop and the valve control loop are connected with the energy accumulator through a hydraulic control one-way valve.

In some embodiments, the pilot operated check valve comprises a first pilot operated valve block and a second pilot operated valve block; the first hydraulic control valve group is connected with a valve control loop; the first hydraulic control valve group and the second hydraulic control valve group are connected in series and connected into a motor control loop.

In some embodiments, the first pilot operated valve set comprises a two-way cartridge valve I and a solenoid directional valve I; the second hydraulic control valve group comprises a two-way cartridge valve II and an electromagnetic reversing valve II; the two-way cartridge valve I and the two-way cartridge valve II comprise an oil inlet, an oil outlet and a hydraulic control port; the energy accumulator is connected with the oil inlet of the two-way cartridge valve I, the oil inlets of the valve control loop and the two-way cartridge valve II are both connected with the oil outlet of the two-way cartridge valve I, and the oil outlet of the two-way cartridge valve II is connected with the motor control loop; the electromagnetic directional valve I is connected to the hydraulic control port of the two-way cartridge valve I, and the electromagnetic directional valve II is connected to the hydraulic control port of the two-way cartridge valve II.

In some embodiments, the second hydraulic control valve block further comprises a manual reversing valve and a shuttle valve; the electromagnetic reversing valve II and the manual reversing valve are respectively connected to two shuttle valve inlets of the shuttle valve, and a shuttle valve outlet of the shuttle valve is connected to a hydraulic control port of the two-way cartridge valve II.

In some embodiments, the electromagnetic directional valve I, the electromagnetic directional valve II, and the manual directional valve all include a first port, a second port, and a third port; the first valve port and the second valve port of any one of the electromagnetic directional valve I, the electromagnetic directional valve II and the manual directional valve are alternately communicated with the third valve port;

The first valve port of the electromagnetic directional valve I is connected with the energy accumulator, the second valve port of the electromagnetic directional valve I is connected with the hydraulic oil tank, and the third valve port of the electromagnetic directional valve I is connected with the hydraulic control port of the two-way cartridge valve I;

the first valve ports of the electromagnetic directional valve II and the manual directional valve are both connected to the oil outlet of the two-way cartridge valve I, the second valve ports of the electromagnetic directional valve II and the manual directional valve are both connected to the hydraulic oil tank, and the third valve ports of the electromagnetic directional valve II and the manual directional valve are respectively connected to the two shuttle valve inlets of the shuttle valve.

In some embodiments, the hydraulic control reversing valve II is used for connecting a working circuit; the hydraulic control reversing valve II comprises a first oil port, a second oil port, a third oil port and a hydraulic control port; the first oil port of the hydraulic control reversing valve II is connected with the oil outlet of the two-way cartridge valve I, the second oil port of the hydraulic control reversing valve II is connected with a hydraulic oil tank, the third oil port of the hydraulic control reversing valve II is used for connecting a working loop, and the hydraulic control port of the hydraulic control reversing valve II is connected with a hydraulic pump;

the explosion-proof diesel engine and the hydraulic pump are used for controlling the first oil port and the second oil port of the hydraulic control reversing valve II to be alternately communicated with the third oil port.

In some embodiments, a pilot operated directional valve I is provided between the motor control circuit and the hydraulic pump; the hydraulic control reversing valve I comprises an oil inlet, an oil outlet, a non-through port and a hydraulic control port; the oil inlet of the hydraulic control reversing valve I is connected with the oil outlet of the hydraulic control one-way valve, the oil outlet of the hydraulic control reversing valve I is connected with the hydraulic starting motor, and the hydraulic control port of the hydraulic control reversing valve I is connected with the hydraulic pump; the hydraulic pump is used for controlling the oil outlet and the non-through port of the hydraulic control reversing valve I to be alternately communicated with the oil inlet.

In some embodiments, any one of the oil inlet of the hydraulic control check valve and the inlet of the hydraulic control port and the valve control cylinder of the hydraulic control reversing valve I is provided with a damping element for adjusting the oil flow.

In some embodiments, both the fluid-charge circuit and the fluid-charge circuit are connected to the accumulator through an electromagnetic unloading relief valve; the liquid supplementing loop is provided with a pipeline filter; the pipeline filter comprises:

a filter element for filtering oil;

the transmitter is used for detecting the oil operation parameters;

and the bypass valve is used for automatically opening when the sender reaches a set value.

Compared with the background art, the explosion-proof diesel engine starting control system provided by the application comprises an explosion-proof diesel engine and an energy accumulator; the energy accumulator is connected with three liquid paths of a liquid filling loop, a liquid supplementing loop and a starting loop; the explosion-proof diesel engine is connected with the liquid supplementing loop through the hydraulic pump.

Both the charging circuit and the replenishing circuit are connected with the accumulator and the hydraulic oil tank. As the name suggests, the aforementioned charge circuit is used to charge the accumulator with the oil in the hydraulic tank, and the aforementioned charge circuit supplements the oil in the accumulator with the oil in the hydraulic tank.

The starting loop is connected with the energy accumulator and the explosion-proof diesel engine and the hydraulic starting motor. The energy accumulator filled with a certain amount of oil can start the hydraulic starting motor through the starting loop, and then the hydraulic starting motor drives the explosion-proof diesel engine to operate, so that the explosion-proof diesel engine is started.

The liquid filling loop is usually used for first liquid filling of the energy accumulator, namely after the explosion-proof diesel engine starting control system is installed, the liquid filling loop can be used for leading the oil in the hydraulic oil tank into the energy accumulator until the oil pressure in the working cavity of the energy accumulator reaches a preset value, so that the preparation for starting the explosion-proof diesel engine is made. And then, the energy accumulator utilizes the starting loop to feed oil into related equipment such as the explosion-proof diesel engine, the hydraulic starting motor and the like, so that the hydraulic starting motor and the explosion-proof diesel engine are started. After the energy accumulator starts the explosion-proof diesel engine to the period of shutdown of the explosion-proof diesel engine, the explosion-proof diesel engine can charge the oil in the hydraulic oil tank into the energy accumulator through the hydraulic pump and the fluid supplementing loop, and the energy accumulator is supplemented with the oil consumed by starting the hydraulic starting motor and the explosion-proof diesel engine, so that the oil pressure of a working cavity of the energy accumulator returns to a preset value again, and preparation is made for the energy accumulator to start the explosion-proof diesel engine again.

In the explosion-proof diesel engine starting control system, the energy accumulator is connected with the fluid supplementing loop through the one-way valve; the accumulator is connected to the starting circuit through a hydraulic control one-way valve. The check valve and the hydraulic control check valve belong to a non-leakage valve (or a low-leakage valve), so that compared with a slide valve type reversing valve adopted by the conventional technology, the check valve and the hydraulic control check valve can greatly improve the pressure maintaining effect on the energy accumulator on one hand, the phenomenon that the oil pressure in the energy accumulator is gradually reduced due to frequent operation of the slide valve type reversing valve is avoided, and on the other hand, compared with the manual operation attribute of the slide valve type reversing valve, the hydraulic control check valve can realize program control operation or remote control, so that program control starting and remote starting of an explosion-proof diesel engine are realized.

Therefore, the explosion-proof diesel engine starting control system improves the pressure maintaining performance of the energy accumulator, and ensures that the energy accumulator can safely and reliably realize frequent starting and stopping of the explosion-proof diesel engine; the program control starting and remote starting of the explosion-proof diesel engine are also satisfied, and the explosion-proof diesel engine starting control system and the application of the explosion-proof diesel engine in special working environments such as narrow space, large height to the ground and complex road conditions are facilitated.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present application, and that other drawings may be obtained according to the provided drawings without inventive effort to a person skilled in the art.

Fig. 1 is a schematic structural diagram of an explosion-proof diesel engine start control system according to an embodiment of the present application.

Wherein,

1-hydraulic oil tank, 2-manual pump, 3-pneumatic pump, 4-hydraulic pump, 5-explosion-proof diesel engine, 6-hydraulic starting motor, 7-throttle valve, 8-valve control oil cylinder, 9-pipeline filter and 10-damping element;

111-is a shuttle valve II, 112-a shuttle valve I;

12-electromagnetic unloading overflow valve, 13-pressure sensor and 14-mechanical pressure gauge;

151-a hydraulic control reversing valve I and 152-a hydraulic control reversing valve II;

16-overflow valve, 17-relief valve, 18-check valve, 19-accumulator;

201-two-way cartridge valves II and 202-two-way cartridge valves I;

211-electromagnetic directional valves II and 212-electromagnetic directional valves I;

22-manual reversing valve.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

In order to better understand the aspects of the present application, a further detailed description of the present application will be provided below with reference to the accompanying drawings and detailed description.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an explosion-proof diesel engine start control system provided in an embodiment of the present application.

The application provides an explosion-proof diesel engine starting control system, which comprises an explosion-proof diesel engine 5, an energy accumulator 19, a hydraulic oil tank 1 and a hydraulic starting motor 6; the hydraulic starting motor 6 is connected to the explosion-proof diesel engine 5, and the hydraulic starting motor 6 in an open state can transmit power to the explosion-proof diesel engine 5 to enable the explosion-proof diesel engine 5 to operate.

In the explosion-proof diesel engine starting control system, an accumulator 19 is connected with a liquid filling loop, a liquid supplementing loop and a starting loop; both the charging circuit and the replenishing circuit are connected to the hydraulic oil tank 1 for inputting the oil in the hydraulic oil tank 1 into the accumulator 19; the starting loop is connected with the explosion-proof diesel engine 5 and the hydraulic starting motor 6, and the oil in the energy accumulator 19 realizes the start and stop control of the explosion-proof diesel engine 5 and the hydraulic starting motor 6 through the starting loop; the explosion-proof diesel engine 5 is connected to the fluid-supply circuit via a hydraulic pump 4.

As for the charging circuit, as the name implies, the charging circuit is used for charging the accumulator 19 with oil, i.e. the oil in the hydraulic oil tank 1 is charged into the accumulator 19, so that the oil volume and the oil pressure of the accumulator 19 reach preset values, and the starting and stopping of the explosion-proof diesel engine 5 and the hydraulic starting motor 6 are prepared for the subsequent use of the accumulator 19 by using the starting circuit. The charge circuit may be configured to pump the oil in the hydraulic tank 1 to the accumulator 19 based on a pump provided in the charge circuit, and the pump may be the pneumatic pump 3 or the manual pump 2. In addition, other power equipment which can be used for pumping the oil in the hydraulic oil tank 1 to the accumulator 19 can also meet the operation requirement of the fluid supplementing circuit.

Reference is made to the prior art for specific construction of the charge circuit. In general, referring to fig. 1, the charge circuit connected to the accumulator 19 includes not only the pneumatic pump 3, the manual pump 2, but also the mechanical pressure gauge 14, the relief valve and the safety valve. During the filling process, an operator can observe the pressure value of the accumulator 19 through the mechanical pressure gauge 14, the relief valve is used for setting the working pressure of the accumulator 19, and the safety valve is used for protecting the accumulator 19, so that the accumulator 19 is prevented from being damaged due to the excessive filling when the relief valve fails.

As for the fluid-replenishing circuit, as the name implies, it is used to replenish the fluid into the accumulator 19, that is, after the fluid in the accumulator 19 is consumed, the fluid in the hydraulic tank 1 is replenished into the accumulator 19, so that the fluid volume and the pressure of the fluid in the accumulator 19 reach the preset values again. The oil in the accumulator 19 is consumed because when the accumulator 19 opens the explosion-proof diesel engine 5 and the hydraulic starting motor 6 by using the starting circuit, part of the oil in the accumulator 19 flows to the hydraulic starting motor 6 along the starting circuit, and in this process, the oil amount of the accumulator 19 is reduced and the oil pressure is reduced. According to the previous findings, the fluid-supplementing circuit is not only connected to the accumulator 19, but also connected to the explosion-proof diesel engine 5 through the hydraulic pump 4, so when the accumulator 19 consumes the oil to start the explosion-proof diesel engine 5 and the hydraulic starting motor 6, the explosion-proof diesel engine 5 in the starting state drives the hydraulic pump 4 to operate, the hydraulic pump 4 pumps the oil in the hydraulic oil tank 1 into the accumulator 19 along the fluid-supplementing circuit, thereby realizing fluid supplementing of the accumulator 19, and the oil liquid amount and the oil pressure of the accumulator 19 return to preset values again, so as to prepare for the next starting of the explosion-proof diesel engine 5 and the hydraulic starting motor 6 by the accumulator 19.

For the starting circuit, it is used to control the start and stop of both the explosion-proof diesel engine 5 and the hydraulic starting motor 6, i.e. the accumulator 19 can start the explosion-proof diesel engine 5 and the hydraulic starting motor 6 through the starting circuit, and can also shut down the explosion-proof diesel engine 5 and the hydraulic starting motor 6 through the starting circuit. When the energy accumulator 19 opens the explosion-proof diesel engine 5 and the hydraulic starting motor 6 through the starting circuit, oil in the energy accumulator 19 flows into the hydraulic starting motor 6 along the starting circuit to drive the hydraulic starting motor 6 to operate, and then the hydraulic starting motor 6 inputs torque to the explosion-proof diesel engine 5 to drive the explosion-proof diesel engine 5 to operate. In contrast, when the accumulator 19 shuts down the explosion-proof diesel engine 5 and the hydraulic starting motor 6 through the aforementioned starting circuit, the oil in the accumulator 19 no longer flows to the hydraulic starting motor 6 along the starting circuit, resulting in the hydraulic starting motor 6 stopping.

In this embodiment, the accumulator 19 is connected to the charging circuit by a non-return valve 18, and the accumulator 19 is connected to the starting circuit by a hydraulically controlled non-return valve. Based on the working principles of the fluid-filled circuit and the starting circuit described above, the outlet of the one-way valve 18 faces the accumulator 19, so as to realize that the oil flows along the fluid-filled circuit to the accumulator 19 and prevent the oil in the accumulator 19 from flowing reversely along the fluid-filled circuit; the outlet of the hydraulic control one-way valve faces away from the energy accumulator 19 and towards the explosion-proof diesel engine 5 and the hydraulic starting motor 6, so that oil in the energy accumulator 19 flows to the explosion-proof diesel engine 5 and the hydraulic starting motor 6 along the starting circuit, and oil in the starting circuit is prevented from flowing reversely.

The hydraulic control one-way valve plays a one-way function of the valve on one hand and is used for controlling the flowing state of oil in the accumulator 19 along the starting loop, and on the other hand, has a hydraulic control function, and liquid introduced into the hydraulic control one-way valve can be used for controlling the opening and closing states of the hydraulic control one-way valve so as to further control whether the oil in the accumulator 19 flows to the explosion-proof diesel engine 5 and the hydraulic starting motor 6 along the starting loop. The liquid introduced into the hydraulic control one-way valve can be oil in the accumulator 19 or other liquid.

The oil pressure in the accumulator 19 is particularly critical to the start-stop control of the explosion-proof diesel engine 5, and therefore, besides the liquid filling loop and the liquid supplementing loop are utilized to increase the liquid amount and the oil pressure in the accumulator 19, the accumulator 19 needs to be pressurized when the liquid amount and the oil pressure in the accumulator 19 rise to preset values, so that the pressure of the accumulator 19 is prevented from gradually decreasing due to the leakage of the oil in the accumulator 19. In the explosion-proof diesel engine starting control system, when the accumulator 19 is full of oil, two possible leakage modes mainly exist in the oil in the accumulator 19, wherein the oil amount and the oil pressure of the accumulator 19 are raised to preset values to be regarded that the accumulator 19 is full of oil: (1) The oil in the accumulator 19 flows to the hydraulic oil tank 1 along the fluid supplementing loop; (2) The oil in the accumulator 19 flows along the starting circuit to the explosion-proof diesel engine 5 and the hydraulic starting motor 6, and for the two possible leakage modes, the explosion-proof diesel engine starting control system prevents the oil-filled accumulator 19 from leaking oil by using a non-leakage valve (or called a low-leakage valve) such as a one-way valve 18 and a hydraulic control one-way valve, namely, pressure maintaining is realized on the oil-filled accumulator 19.

Compared with the existing anti-explosion diesel engine starting control system adopting the slide valve type reversing valve, the anti-explosion diesel engine starting control system provided by the application firstly utilizes the liquid filling loop, the liquid supplementing loop and the starting loop to meet the operation requirements of the energy accumulator 19 and the anti-explosion diesel engine 5; secondly, the hydraulic control one-way valve arranged in the starting loop is utilized to realize hydraulic starting of the starting loop, and as the hydraulic control one-way valve is often matched with a corresponding electromagnetic valve or a manual valve for use, the hydraulic control one-way valve can realize program control operation or remote control, and correspondingly, the hydraulic control one-way valve can realize program control starting and remote starting of the explosion-proof diesel engine 5; thirdly, the accumulator 19 is pressurized by utilizing the non-leakage valve, i.e. the one-way valve 18 arranged in the fluid supplementing loop and the hydraulic control one-way valve arranged in the starting loop, so that the phenomenon that the oil pressure in the accumulator 19 is gradually reduced due to frequent operation of the slide valve type reversing valve is avoided, and the pressurizing performance of the accumulator 19 is improved.

The hydraulic control check valve is matched with an electromagnetic valve or a manual valve, and means that when the liquid is introduced into the hydraulic control check valve and the liquid is discharged from the hydraulic control check valve to be controlled by utilizing the liquid such as oil liquid, at the moment, the electromagnetic valve, a related circuit and a liquid path can be adopted to control the liquid inflow and outflow control check valve, and the manual valve and a related liquid path can also be adopted to control the liquid inflow and outflow control check valve. Thus, the solenoid valve and its associated circuitry, the fluid circuit correspond to the programmed actuation of the pilot operated check valve and the programmed actuation of the explosion-proof diesel engine 5, and the manual valve and its associated fluid circuit correspond to the remote actuation of the pilot operated check valve and the remote actuation of the explosion-proof diesel engine 5.

In summary, the explosion-proof diesel engine starting control system provided by the application improves the pressure maintaining performance of the energy accumulator 19, and ensures that the energy accumulator 19 can safely and reliably realize frequent starting and stopping of the explosion-proof diesel engine 5; the system can also meet the program control starting and remote starting of the explosion-proof diesel engine 5, and is beneficial to the application of the explosion-proof diesel engine starting control system and the explosion-proof diesel engine 5 in special working environments such as narrow space, large height to the ground, complex road conditions and the like.

The explosion-proof diesel engine start control system provided by the application is further described below with reference to the accompanying drawings and embodiments.

In some embodiments provided herein, the startup loop includes a motor control loop and a valve control loop; the motor control circuit is connected with the energy accumulator 19 and the hydraulic starting motor 6, and the energy accumulator 19 can control the starting and stopping of the hydraulic starting motor 6 based on the motor control circuit; the valve control circuit is connected with the accumulator 19 and the valve control cylinder 8 of the explosion-proof diesel engine 5, the accumulator 19 can control the opening and closing of the valve control cylinder 8 based on the valve control circuit, when the valve control cylinder 8 is opened, the valve control cylinder 8 opens the valve of the explosion-proof diesel engine 5, at this time, the hydraulic starting motor 6 in the opened state can drive the explosion-proof diesel engine 5 to operate, in other words, when the valve control cylinder 8 and the hydraulic starting motor 6 are both opened, the hydraulic starting motor 6 drives the explosion-proof diesel engine 5 to operate.

The valve control cylinder 8 may be specifically configured as a single acting cylinder; the rodless cavity of the valve control cylinder 8 is a working cavity of the valve control cylinder 8, and a reset spring is arranged in the rod cavity of the valve control cylinder 8, so that the valve of the explosion-proof diesel engine 5 can be automatically closed after the explosion-proof diesel engine 5 is stopped and abnormally closed. In addition, a stroke limiter is usually provided in the rodless chamber of the valve control cylinder 8, and is used for adjusting the opening of the valve of the explosion-proof diesel engine 5.

The valve control cylinder 8 may be connected to the valve control circuit and the hydraulic pump 4 through a shuttle valve II111, as shown in fig. 1, where the shuttle valve II111 has two shuttle valve inlets and one shuttle valve outlet, the valve control circuit and the hydraulic pump 4 are respectively connected to the two shuttle valve inlets of the shuttle valve II111, and the rodless cavity of the valve control cylinder 8 is connected to the shuttle valve outlet of the shuttle valve II 111.

As is clear from the foregoing description, the accumulator 19 is connected to the start-up circuit through a pilot operated check valve, which is provided in both the motor control circuit and the valve control circuit when the start-up circuit includes the motor control circuit and the valve control circuit. For example, the explosion-proof diesel engine starting control system is provided with more than two hydraulic control one-way valves, and the motor control loop and the valve control loop are respectively provided with at least one hydraulic control one-way valve.

When the explosion-proof diesel engine start control system described in the above embodiment is operated, normally, the pilot operated check valve connected to the valve control circuit is opened first, so that the oil in the accumulator 19 flows into the valve control cylinder 8 along the valve control circuit, and the valve control cylinder 8 is opened, so as to prepare for starting the explosion-proof diesel engine 5. Then, a hydraulic control one-way valve connected with the motor control loop is opened, so that the oil in the accumulator 19 flows into the hydraulic starting motor 6 along the motor control loop to realize the starting of the hydraulic starting motor 6, and the explosion-proof diesel engine 5 is driven to run by the hydraulic starting motor 6 in the starting state. Furthermore, the explosion-proof diesel engine 5 in the open state drives the hydraulic pump 4 to operate, so that the normal function of the explosion-proof diesel engine 5 is exerted on one hand, and on the other hand, oil is supplemented to the accumulator 19 by combining the fluid supplementing loop, so that preparation is made for restarting the explosion-proof diesel engine 5 after being closed.

A specific example is provided below for the manner in which the pilot operated check valve is disposed in the startup loop.

The hydraulic control check valve comprises a first hydraulic control valve group and a second hydraulic control valve group.

The first hydraulic control valve group is connected to the valve control loop and is used for controlling whether the oil in the accumulator 19 flows into the valve control cylinder 8. When the first hydraulic control valve group is opened, oil in the accumulator 19 flows into the valve control oil cylinder 8 along the valve control loop, so that the valve control oil cylinder 8 is opened. When the first pilot valve group is closed, oil in the accumulator 19 no longer flows into the valve control cylinder 8 along the valve control circuit, resulting in the valve control cylinder 8 being shut down.

The first hydraulic valve block and the second hydraulic valve block are connected in series and connected to a motor control loop, that is, the first hydraulic valve block and the second hydraulic valve block jointly control whether oil in the accumulator 19 flows into the hydraulic starting motor 6. When both the first hydraulic valve group and the second hydraulic valve group are in the open state, the oil in the accumulator 19 flows into the hydraulic starting motor 6 along the motor control loop, so that the hydraulic starting motor 6 is started. When either one of the first hydraulic valve group and the second hydraulic valve group is in a closed state, the oil in the accumulator 19 no longer flows into the hydraulic starting motor 6 along the motor control circuit, so that the hydraulic starting motor 6 is turned off.

The first hydraulic control valve group specifically may include a two-way cartridge valve I202 and an electromagnetic directional valve I212; the two-way cartridge valve I202 comprises an oil inlet, an oil outlet and a hydraulic control port; the electromagnetic directional valve I212 is connected with the hydraulic control port of the two-way cartridge valve I202, and the electromagnetic directional valve I212 and its related circuit and liquid path can adjust the liquid flow state of the hydraulic control port of the two-way cartridge valve I202, thereby playing the hydraulic control function of the two-way cartridge valve I202. For example, when the electromagnetic directional valve I212 is in the first operation state, the electromagnetic directional valve I212 and its related circuits, and the liquid path can realize the liquid flowing into the liquid control port of the two-way cartridge valve I202; after the electromagnetic directional valve I212 is switched, the electromagnetic directional valve I212 that is originally in the first operating state is adjusted to the second operating state, and at this time, the electromagnetic directional valve I212, the related circuits and the liquid paths thereof can realize that the liquid flows out of the hydraulic control port of the two-way cartridge valve I202.

The first hydraulic control valve set is connected to the valve control loop, that is, the oil inlet of the two-way cartridge valve I202 is connected to the accumulator 19, and the oil outlet of the two-way cartridge valve I202 is connected to the valve control loop.

When the electromagnetic directional valve I212 controls the liquid to flow into the hydraulic control port of the two-way cartridge valve I202, the oil inlet and the oil outlet of the two-way cartridge valve I202 are communicated, at this time, the oil in the accumulator 19 may flow in from the oil inlet of the two-way cartridge valve I202, and then, the oil flows out from the oil outlet of the two-way cartridge valve I202 and flows into the valve control loop, and finally flows into the valve control cylinder 8.

When the electromagnetic directional valve I212 controls the liquid to flow out of the hydraulic control port of the two-way cartridge valve I202, the oil inlet and the oil outlet of the two-way cartridge valve I202 are cut off, and at this time, the oil in the accumulator 19 no longer flows in from the oil inlet of the two-way cartridge valve I202, and accordingly, the valve control loop no longer inputs the oil to the valve control cylinder 8.

The second hydraulic control valve group can comprise a two-way cartridge valve II201 and an electromagnetic directional valve II211; similar to the two-way cartridge valve I202, the two-way cartridge valve II201 also includes an oil inlet, an oil outlet, and a pilot operated port; the electromagnetic directional valve II211 is connected with the hydraulic control port of the two-way cartridge valve II201, and the electromagnetic directional valve II211 and related circuits and liquid paths can be used for adjusting the liquid flow state of the hydraulic control port of the two-way cartridge valve II201, so that the hydraulic control function of the two-way cartridge valve II201 is exerted.

The first hydraulic control valve group and the second hydraulic control valve group are connected in series, namely, the oil outlet of the two-way cartridge valve I202 is connected to the oil inlet of the two-way cartridge valve II201, and the oil in the energy accumulator 19 sequentially flows through the oil inlet of the two-way cartridge valve I202, the oil outlet of the two-way cartridge valve I202, the oil inlet of the two-way cartridge valve II201 and the oil outlet of the two-way cartridge valve II 201.

The connection of the first hydraulic control valve bank and the second hydraulic control valve bank in series to the motor control circuit means that the energy accumulator 19 is connected to the oil inlet of the two-way cartridge valve I202, and the oil outlet of the two-way cartridge valve II201 is connected to the motor control circuit. When both the two-way cartridge valve I202 and the two-way cartridge valve II201 are in the open state, the oil in the accumulator 19 may sequentially flow through the oil inlet of the two-way cartridge valve I202, the oil outlet of the two-way cartridge valve I202, the oil inlet of the two-way cartridge valve II201, the oil outlet of the two-way cartridge valve II201, and the motor control circuit. When the oil in the accumulator 19 flows into the hydraulic starting motor 6 along the motor control loop, the hydraulic starting motor 6 can be started, and then the explosion-proof diesel engine 5 is started by the hydraulic starting motor 6.

In the above specific embodiment, the second hydraulic control valve group may include not only the two-way cartridge valve II201 and the electromagnetic directional valve II211, but also the manual directional valve 22 and the shuttle valve I112. The shuttle valve I112 includes two shuttle valve inlets and one shuttle valve outlet, and the electromagnetic directional valve II211 and the manual directional valve 22 are respectively connected to the two shuttle valve inlets, and the hydraulic control port of the two-way cartridge valve II201 is connected to the shuttle valve outlet. It can be seen that, in the second hydraulic control valve set, the three of the electromagnetic directional valve II211, the manual directional valve 22 and the shuttle valve I112 jointly act on the hydraulic control port of the two-way cartridge valve II201, so as to control the inflow and outflow of the liquid into and out of the hydraulic control port of the two-way cartridge valve II 201.

For a specific action mode of the electromagnetic directional valve I212 in the first hydraulic control valve group, reference may be made to fig. 1, where the electromagnetic directional valve I212 includes a first valve port, a second valve port and a third valve port, the first valve port, the second valve port and the third valve port of the electromagnetic directional valve I212 correspond to the P port, the T port and the a port of the electromagnetic directional valve I212 in fig. 1, respectively, and adjusting the power-on state of the electromagnetic directional valve I212 may enable the first valve port and the second valve port of the electromagnetic directional valve I212 to be alternately connected to the third valve port, that is, adjusting the power-on state of the electromagnetic directional valve I212 may enable the P port and the T port of the electromagnetic directional valve I212 to be alternately connected to the a port.

For example, when the electromagnetic directional valve I212 shown in fig. 1 is not energized, the P port of the electromagnetic directional valve I212 is connected to the a port of the electromagnetic directional valve I212, and at this time, the electromagnetic directional valve I212 is connected to the accumulator 19 and the hydraulic port of the two-way cartridge valve I202, and the oil pressure of the hydraulic port of the two-way cartridge valve I202 rises to be equal to the oil pressure of the accumulator 19, so as to push the valve element of the two-way cartridge valve I202 to move downward in fig. 1, resulting in interception of the oil inlet and the oil outlet of the two-way cartridge valve I202. When the oil inlet and the oil outlet of the two-way cartridge valve I202 are cut off, the two-way cartridge valve I202 is in a closed state, and oil in the accumulator 19 cannot flow to the valve control circuit and the two-way cartridge valve II201 through the two-way cartridge valve I202. When the electromagnetic directional valve I212 shown in fig. 1 is energized, the T port of the electromagnetic directional valve I212 is connected to the a port of the electromagnetic directional valve I212, and at this time, the electromagnetic directional valve I212 is connected to the hydraulic tank 1 and the hydraulic port of the two-way cartridge valve I202, so that the oil pressure of the hydraulic port of the two-way cartridge valve I202 is reduced, the valve element of the two-way cartridge valve I202 is moved upward in fig. 1, and the oil inlet and the oil outlet of the two-way cartridge valve I202 are connected. When the oil inlet and the oil outlet of the two-way cartridge valve I202 are communicated, the two-way cartridge valve I202 is in an open state, and the oil in the accumulator 19 can flow to the valve control circuit and the two-way cartridge valve II201 through the two-way cartridge valve I202.

For the specific action modes of the electromagnetic directional valve I212, the manual directional valve 22 and the shuttle valve I112 in the second hydraulic control valve bank, still referring to fig. 1, any one of the electromagnetic directional valve II211 and the manual directional valve 22 includes a first valve port, a second valve port and a third valve port, the first valve port, the second valve port and the third valve port of the electromagnetic directional valve II211 correspond to the P port, the T port and the a port of the electromagnetic directional valve II211 in fig. 1 respectively, the first valve port, the second valve port and the third valve port of the manual directional valve 22 correspond to the P port, the T port and the a port of the manual directional valve 22I in fig. 1 respectively, and adjusting the power-on state of the electromagnetic directional valve II211 can enable the P port and the T port of the electromagnetic directional valve II211 to be alternately connected to the a port, and an operator manually adjusts the manual directional valve 22 can enable the P port and the T port of the manual directional valve 22 to be alternately connected to the a port.

When the electromagnetic directional valve II211 shown in FIG. 1 is not electrified, the P port of the electromagnetic directional valve II211 is communicated with the A port of the electromagnetic directional valve I212, and at the moment, the electromagnetic directional valve II211 is communicated with the oil outlet of the two-way cartridge valve I202 and one of the shuttle valve inlets of the shuttle valve I112; meanwhile, when the manual directional valve 22 is in the first state, the P port of the manual directional valve 22 is connected to the a port of the manual directional valve 22, and at this time, the manual directional valve 22 communicates the oil outlet of the two-way cartridge valve I202 with the other shuttle valve inlet of the shuttle valve I112. Since the oil outlet of the two-way cartridge valve I202 is connected to the two shuttle valve inlets of the shuttle valve I112 through the electromagnetic directional valve II211 and the manual directional valve 22, respectively, the oil pressure of any one shuttle valve inlet is equal to the oil pressure of the oil outlet of the two-way cartridge valve I202, so that the spool of the shuttle valve I112 is at the middle position, at this time, any one shuttle valve inlet of the shuttle valve I112 is blocked from the shuttle valve outlet, in other words, at this time, the shuttle valve I112 is blocked and the oil outlet of the two-way cartridge valve I202 and the hydraulic control port of the two-way cartridge valve.

When the electromagnetic valve reversing valve II shown in fig. 1 is electrified, the port T of the electromagnetic reversing valve II211 is communicated with the port A of the electromagnetic reversing valve II211, and at the moment, the electromagnetic reversing valve II211 is communicated with one of the shuttle valve inlets of the hydraulic oil tank 1 and the shuttle valve I112; meanwhile, when the manual directional valve 22 is in the second state, the port T of the manual directional valve 22 is connected to the port a of the manual directional valve 22, and at this time, the manual directional valve 22 communicates with the hydraulic tank 1 and the other shuttle valve inlet of the shuttle valve I112. Since the hydraulic tank 1 is connected to the two shuttle valve inlets of the shuttle valve I112 through the electromagnetic directional valve II211 and the manual directional valve 22, the oil pressure of any one of the shuttle valve inlets is equal to the oil pressure of the hydraulic tank 1, so that the spool of the shuttle valve I112 is at the intermediate position, at this time, any one of the shuttle valve inlets of the shuttle valve I112 is blocked from the shuttle valve outlet, in other words, at this time, the shuttle valve I112 is blocked and the oil outlet of the two-way cartridge valve I202 and the hydraulic control port of the two-way cartridge valve.

Based on the above discussion, when the electromagnetic directional valve II211 is in the non-energized state and the manual directional valve 22 is in the second state, the P port of the electromagnetic directional valve II211 is connected to the a port of the electromagnetic directional valve I212, and the T port of the manual directional valve 22 is connected to the a port of the manual directional valve 22, the oil pressures of the two shuttle valve inlets of the shuttle valve I112 are unequal, and the spool of the shuttle valve I112 is shifted to the side of the one shuttle valve inlet with smaller oil pressure; when the electromagnetic directional valve II211 is in the energized state and the manual directional valve 22 is in the first state, the T port of the electromagnetic directional valve II211 is connected to the a port of the electromagnetic directional valve I212, and the P port of the manual directional valve 22 is connected to the a port of the manual directional valve 22, which also causes the oil pressure of the two shuttle valve inlets of the shuttle valve I112 to be unequal, and further causes the spool of the shuttle valve I112 to be shifted to the side of the one shuttle valve inlet with the smaller oil pressure. Once the spool of the shuttle valve I112 is shifted, the shuttle valve I112 is in an open state, at which time the shuttle valve I112 communicates the oil outlet of the two-way directional valve II with the oil inlet of the two-way directional valve I.

In this explosion-proof diesel engine start control system, since the initial state of the electromagnetic directional valve II211 is the non-energized state and the initial state of the manual directional valve 22 is the first state, the electromagnetic directional valve II211 and the manual directional valve 22 correspond to parallel paths for controlling the opening and closing of the shuttle valve I112, and an operator can realize circuit control of opening and closing of the shuttle valve I112 by the electromagnetic directional valve II211 or can realize manual control of opening and closing of the shuttle valve I112 by the manual directional valve 22. The electromagnetic directional valve II211 and the manual directional valve 22 are in a redundant design, so that the explosion-proof diesel engine 5 can be started manually in a short distance near the explosion-proof diesel engine 5 when the electromagnetic directional valve II211 fails or the electromagnetic directional valve II211 is inconvenient to operate, the operation safety of the second hydraulic control valve group is improved, and the operation safety of the explosion-proof diesel engine 5 is further improved.

On the basis of the above embodiment, the explosion-proof diesel engine starting control system further comprises a hydraulic control reversing valve II152 for connecting a working circuit, wherein the working circuit can be various liquid circuits controlled by the explosion-proof diesel engine 5 and the hydraulic control reversing valve II152, and can refer to a vehicle brake release circuit, for example.

Referring to fig. 1, the pilot operated directional valve II152 includes a first oil port, a second oil port, a third oil port, and a pilot operated port; the first oil port of the hydraulic control reversing valve II152 is connected with the oil outlet of the two-way cartridge valve I202 and is further communicated with the energy accumulator 19; the second oil port of the hydraulic control reversing valve II152 is connected with the hydraulic oil tank 1; the third oil port of the hydraulic control reversing valve II152 is used for connecting a working loop; the hydraulic control port of the hydraulic control reversing valve II152 is connected with the hydraulic pump 4. As is clear from the foregoing description, since the explosion-proof diesel engine 5 is connected to the hydraulic pump 4, the explosion-proof diesel engine 5 can control the start and stop of the hydraulic pump 4, and further control the signal input from the hydraulic pump 4 to the pilot operated port of the pilot operated directional valve II 152. The hydraulic control reversing valve II152 may be specifically configured as a hydraulic control reversing ball valve.

For example, the pilot operated directional valve II152 is connected to the vehicle brake release circuit; when the explosion-proof diesel engine 5 is in a closed state, the hydraulic pump 4 is shut down, the hydraulic pump 4 cannot input oil to the hydraulic control port of the hydraulic control reversing valve II152, so that the hydraulic control reversing valve II152 is in a first state, at the moment, the first oil port of the hydraulic control reversing valve II152 is not communicated, and the second oil port of the hydraulic control reversing valve II152 is communicated with the third oil port; when the explosion-proof diesel engine 5 is in an open state, the hydraulic pump 4 operates, and the hydraulic pump 4 inputs oil to the hydraulic control port of the hydraulic control reversing valve II152, so that the hydraulic control reversing valve II152 is in a second state, at this time, the first oil port of the hydraulic control reversing valve II152 is communicated with the third oil port, and the second oil port of the hydraulic control reversing valve II152 is not communicated. It can be seen that the pilot operated directional control valve II152 connected to the vehicle brake release circuit and the hydraulic pump 4 can automatically supply and stop the oil supply to the vehicle brake release circuit, thereby improving the safety of the explosion-proof diesel engine start control system.

When the pilot operated directional control valve II152 is in the first state, the pilot operated directional control valve II152 communicates the vehicle brake release circuit with the hydraulic tank 1, so that the oil pressure of the vehicle brake release circuit is reduced, and at this time, the vehicle brake release circuit is seen to be in a closed state. When the vehicle brake release circuit is closed, the component controlled by the vehicle brake release circuit and for performing the vehicle brake release function is not operated, and it is apparent that the component does not brake the vehicle, in other words, the vehicle is in a normal running state.

When the pilot operated directional control valve II152 is in the second state, the pilot operated directional control valve II152 communicates the vehicle brake release circuit with the accumulator 19, and the oil pressure of the vehicle brake release circuit increases, and at this time, the vehicle brake release circuit is visually opened. When the vehicle brake release circuit is turned on, the components controlled by the vehicle brake release circuit to exert the vehicle brake release action operate, and it is apparent that the components brake the vehicle, in other words, the vehicle is in a braking state. Of course, in order for the oil in the accumulator 19 to flow into the vehicle brake release circuit via the pilot operated directional valve II152, the pilot operated directional valve II152 should be in an open state, that is, the oil inlet and the oil outlet of the pilot operated directional valve II152 are in communication with each other.

In some other embodiments provided herein, the explosion-proof diesel engine start control system further includes a pilot operated directional valve I151 disposed between the motor control circuit and the hydraulic pump 4, and the hydraulic pump 4 can feedback-control the operation state of the pilot operated directional valve I151, thereby feedback-controlling the operation states of the motor control circuit and the hydraulic start motor 6.

The hydraulic control reversing valve I151 comprises an oil inlet, an oil outlet, a non-through port and a hydraulic control port; the reversing function of the hydraulic control reversing valve I151 is embodied in that an oil inlet of the hydraulic control reversing valve I is alternately connected with an oil outlet and a non-through port. The non-through port is referred to the oil inlet, the oil outlet and the hydraulic control port, in other words, when the oil flows to the oil inlet, the oil can flow through the oil inlet, so as to flow in and out from the oil inlet, and when the oil is in the non-through port, the oil cannot flow through the non-through port.

The oil inlet of the pilot operated directional valve I151 is connected to the oil outlet of the pilot operated directional valve, and the pilot operated directional valve I151 is known to be in communication with the motor control circuit, so when the pilot operated directional valve includes a two-way cartridge valve I202 connected to the valve control circuit and a two-way cartridge valve II201 connected to the motor control circuit, the oil inlet of the pilot operated directional valve I151 is connected to the oil outlet of the two-way cartridge valve II 201.

The oil outlet of the pilot operated directional control valve I151 is connected to the hydraulic starting motor 6. When the pilot operated directional control valve I151 is in an open state, the oil inlet of the pilot operated directional control valve I151 is communicated with the oil outlet of the pilot operated directional control valve I151, and at this time, the oil in the accumulator 19 may sequentially flow through the pilot operated one-way valve, the pilot operated directional control valve I151 and flow into the hydraulic starting motor 6 along the starting circuit.

The hydraulic control port of the hydraulic control reversing valve I151 is connected to the hydraulic pump 4. When the hydraulic pump 4 is in two different states of opening and closing, the hydraulic pump 4 inputs two different hydraulic signals to the hydraulic control port of the hydraulic control reversing valve I151, and the two different hydraulic information can realize that the oil outlet and the non-through port of the hydraulic control reversing valve I151 are controlled to be alternately communicated with the oil inlet.

For example, when the hydraulic pump 4 is in the off state, the hydraulic pump 4 inputs the first hydraulic signal to the pilot port of the pilot operated directional valve I151. The oil inlet of the pilot operated directional valve I151 is connected to the oil outlet of the pilot operated directional valve I151 under the control of the first hydraulic signal, that is, the pilot operated directional valve I151 is in an open state, and the accumulator 19 can supply oil to the hydraulic starting motor 6 along the starting circuit, so as to start the hydraulic starting motor 6.

When the hydraulic pump 4 is in the on state, the hydraulic pump 4 continuously pumps the oil in the hydraulic oil tank 1 to the respective parts connected to the hydraulic pump 4. Once the oil pressure pumped by the hydraulic pump 4 to the hydraulic control port of the hydraulic control reversing valve I151 reaches a certain value, the hydraulic pump 4 can be seen to input a second hydraulic signal to the hydraulic control port of the hydraulic control reversing valve I151. The oil inlet of the hydraulic control reversing valve I151 is communicated with the non-through port of the hydraulic control reversing valve I151 under the control of the second hydraulic signal, namely the hydraulic control reversing valve I151 is in a closed state, the accumulator 19 cannot supply oil to the hydraulic starting motor 6 along a starting loop, and the three of the hydraulic starting motor 6, the explosion-proof diesel engine 5 and the hydraulic pump 4 are driven to be automatically shut down.

In short, the anti-explosion diesel engine starting control system can automatically cut off the oil supply of the hydraulic starting motor 6 after the anti-explosion diesel engine 5 is successfully started by means of the connection relation among the hydraulic pump 4, the hydraulic control reversing valve I151 and the starting loop, so that the hydraulic starting motor 6 is prevented from continuously increasing in speed to cause high-speed rotation damage.

In addition to the automatic cut-off supply of liquid to the hydraulic starting motor 6 based on the pilot operated directional valve I151, the explosion-proof diesel engine starting control system provided by the present application may take the following measures in order to improve the system safety.

The explosion-proof diesel engine starting control system is provided with damping elements 10 in each loop, for example, a first damping element is arranged at an oil inlet of a hydraulic control one-way valve, a second damping element is arranged at a hydraulic control port of a hydraulic control reversing valve I151, a third damping element is arranged at a hydraulic control port of a hydraulic control reversing valve II152, and a fourth damping element is arranged at an inlet of a valve control oil cylinder 8.

The first damping element is positioned at the front end of the oil inlet of the hydraulic control one-way valve and is used for adjusting the opening and closing speed of the hydraulic control one-way valve and reducing the hydraulic impact on the hydraulic control one-way valve. For example, when the pilot operated check valve includes the two-way cartridge valve I202 and the two-way cartridge valve II201, the first damping element may be disposed at the front end of the pilot operated port of the two-way cartridge valve I202, for adjusting the opening speed and the closing speed of the two-way cartridge valve I202, so as to reduce the hydraulic impact applied to the two-way cartridge valve I202. The first damping element can also be arranged at the front end of the hydraulic control port of the two-way cartridge valve II201 and used for adjusting the opening speed and the closing speed of the two-way cartridge valve II201 and reducing the hydraulic impact on the two-way cartridge valve II 201. In addition, a first damping element may be further disposed at the hydraulic control port of the two-way cartridge valve I202 and the hydraulic control port of the two-way cartridge valve II 201.

The second damping element is positioned at the front end of the hydraulic control port of the hydraulic control reversing valve I and is used for adjusting the reversing speed of the hydraulic control reversing valve I, slowing down the stopping speed of the hydraulic starting motor 6 and prolonging the service life of the hydraulic starting motor 6.

The third damping element is located at the front end of the hydraulic control port of the hydraulic control reversing valve II152 and is used for adjusting the reversing speed of the hydraulic control reversing valve II152 and prolonging the service life of a working loop controlled by the hydraulic control reversing valve II 152.

The fourth damping element is positioned at the front end of the inlet of the valve control oil cylinder 8, can adjust the oil return speed of the valve control oil cylinder 8, slow down the opening and closing speed of the valve of the explosion-proof diesel engine 5 and ensure the valve of the explosion-proof diesel engine 5.

The explosion-proof diesel engine starting control system can also be provided with an electromagnetic unloading overflow valve 12 between the liquid supplementing loop and the liquid filling loop, and a pipeline filter 9 is arranged in the liquid supplementing loop. For the aforementioned fluid-filled circuit, the suction port of the hydraulic pump 4 is connected to the hydraulic tank 1, and the outlet of the hydraulic pump 4 is connected in sequence to the working chambers of the circuit filter 9, the check valve 18, and the accumulator 19. When the explosion-proof diesel engine 5 in the opened state drives the hydraulic pump 4 to operate, the hydraulic pump 4 automatically charges the working chamber of the accumulator 19.

The electromagnetic unloading overflow valve 12 is connected with the fluid supplementing loop and the fluid filling loop. When the hydraulic oil in the hydraulic oil tank 1 is charged into the accumulator 19 by the aid of the liquid supplementing loop, the electromagnetic unloading overflow valve 12 can realize unloading starting of the hydraulic pump 4, starting instant power of the explosion-proof diesel engine 5 is reduced, hydraulic and electric starting performance of the explosion-proof diesel engine 5 is improved, and success rate of restarting the explosion-proof diesel engine 5 in a low-temperature environment is improved.

The electromagnetic unloading relief valve 12 is usually operated in conjunction with a pressure sensor 13 connected to an accumulator 19, for example, the accumulator 19 is connected to a pressure sensor I and a pressure sensor II. The pressure sensor I is used for monitoring the oil pressure of the accumulator 19, when the pressure sensor I detects that the oil pressure of the accumulator 19 reaches a preset value, the electric control device of the anti-explosion diesel engine starting control system sends a specification to the electromagnetic unloading overflow valve 12, so that the electromagnetic unloading overflow valve 12 is powered off, the hydraulic pump 4 is unloaded, the energy loss of the anti-explosion diesel engine starting control system caused by high-pressure overflow is reduced, and the energy-saving control of the anti-explosion diesel engine starting control system is realized. The pressure sensor II is used for monitoring the oil pressure of the output port of the hydraulic pump 4, the monitoring value of the pressure sensor II can be transmitted to an electric control device of the explosion-proof diesel engine starting control system in real time, and the reliability of the explosion-proof diesel engine starting control system is improved.

The pipeline filter 9 is arranged in the fluid supplementing loop and comprises a filter element, a signaling device and a bypass valve; the signaling device is coupled with the bypass valve. The filter element is used for filtering oil flowing through the fluid supplementing loop; the transmitter is used for detecting oil operation parameters of oil flowing through the filter element, when the oil pressure of the oil flowing through the filter element exceeds preset parameters of the transmitter due to factors such as filter element blockage, too low oil temperature and flow pulsation, the transmitter transmits a specific signal, and based on the specific signal, an operator can be timely reminded of timely maintaining a system, such as replacing the filter element and improving the oil temperature, and the bypass valve can be automatically opened to protect an explosion-proof diesel engine starting control system and a fluid supplementing loop thereof, so that the reliability of the explosion-proof diesel engine starting control system is improved.

The starting control system of the explosion-proof diesel engine provided by the application can not only distinguish and obtain a liquid filling loop, a liquid supplementing loop and a starting loop, but also distinguish and obtain other liquid paths such as a pressure maintaining loop around the different working states of the two main devices of the energy accumulator 19 and the explosion-proof diesel engine 5.

The charging circuit is provided with two charging modes, automatic charging and manual charging, and the operation safety of the accumulator 19 can be ensured by relying on the relief valve 16 and the relief valve 17.

For the liquid supplementing loop, oil liquid in a working cavity of the accumulator 19 can be automatically and timely supplemented based on the explosion-proof diesel engine 5 and the hydraulic pump 4 in an opened state, preparation is made for frequent starting of the explosion-proof diesel engine 5 by the accumulator 19, meanwhile, unloading starting of the hydraulic pump 4 can be realized by depending on the electromagnetic unloading overflow valve 12 and the pressure sensor 13, starting instant power of the explosion-proof diesel engine 5 is reduced, hydraulic and electric starting performance of the explosion-proof diesel engine 5 is improved, and success rate of restarting of the explosion-proof diesel engine 5 in a low-temperature environment is improved.

For the pressure maintaining loop, the electromagnetic reversing valve I212 is used for controlling the opening and closing of the two-way cartridge valve I202, so that the two-way cartridge valve I202 in a closed state prevents the oil in the accumulator 19 from leaking to the explosion-proof diesel engine 5 and the hydraulic starting motor 6, and meanwhile, the one-way valve 18 with a spring is used for preventing the oil in the accumulator 19 from leaking to the hydraulic pump 4. In short, when the pressure of the accumulator 19 needs to be maintained, the oil of the accumulator 19 is firmly blocked in the working cavity of the accumulator 19 through the common operation of the two-way cartridge valve I202 and the one-way valve 18, so that the problem that the pressure of the accumulator 19 is automatically reduced due to the internal leakage of the slide valve type reversing valve in the explosion-proof diesel engine power equipment in the prior art is solved.

For a starting loop, when an ECU of the explosion-proof diesel engine starting control system is electrified, the electromagnetic directional valve I212 and the electromagnetic directional valve II211 sequentially open the two-way cartridge valve I202 and the two-way cartridge valve I202I201, so that the valve control oil cylinder 8 and the hydraulic starting motor 6 are sequentially opened, and the explosion-proof diesel engine 5 is started. When the electromagnetic directional valve I212 opens the two-way cartridge valve I202 to realize the opening of the valve control oil cylinder 8, the valve control oil cylinder 8 opens the valve of the explosion-proof diesel engine 5; when the electromagnetic directional valve II211 opens the two-way cartridge valve II201 to realize the starting of the hydraulic starting motor 6, the hydraulic starting motor 6 drives the explosion-proof diesel engine 5 to operate. After the hydraulic starting motor 6 successfully starts the explosion-proof diesel engine 5, the hydraulic pump 4 can automatically cut off the hydraulic control reversing valve I of the starting circuit by utilizing the output pressure of the hydraulic pump 4 so as to prevent the starting circuit from continuously supplying oil to the hydraulic driving motor and prevent the hydraulic starting motor 6 from being damaged due to high-speed rotation. In addition, in the starting loop, the hydraulic starting motor 6 and the explosion-proof diesel engine 5 are in gear transmission and are accurately meshed, so that the meshing position of the explosion-proof diesel engine 5 and the hydraulic starting motor 6 is prevented from loosening before the rotation speed of the explosion-proof diesel engine 5 is lower than the ignition rotation speed. The starting circuit is further provided with a throttle valve 7, the throttle valve 7 being located upstream of the hydraulic starting motor 6 for adjusting the operating speed of the hydraulic starting motor 6.

The accumulator 19 is in a pressure maintaining state based on the pressure maintaining circuit in a section from when the valve control cylinder 8 is opened to when the hydraulic starting motor 6 is about to be started, and oil in the accumulator 19 is not leaked.

In summary, the explosion-proof diesel engine starting control system provided by the application can meet the safety starting of the explosion-proof diesel engine 5 in the working environments such as underground coal mine and the like, and is especially suitable for the design requirements of normal use requirements of the explosion-proof diesel engine 5 under complex road conditions such as large underground coal mine gradient, multiple curves, wavy curves, high positions and the like. The anti-explosion diesel engine starting control system adopts the two-way cartridge valve, the one-way valve 18 and other non-leakage valves to enhance the sealing effect of the related liquid path, improves the pressure maintaining performance of the accumulator 19, effectively solves the problem that the pressure of the accumulator 19 is gradually reduced due to the internal leakage of the slide valve type reversing valve in the prior art, and does not need to manually close the related valves when the related power equipment of the anti-explosion diesel engine 5 is shut down or is shut down abnormally. The starting control system of the explosion-proof diesel engine optimizes the starting loop of the explosion-proof diesel engine 5, increases the hydraulic electro-pneumatic function, realizes the redundant design, can realize the remote starting or program-controlled starting of the explosion-proof diesel engine 5, and solves the problem that the explosion-proof diesel engine 5 is difficult to quickly start the explosion-proof diesel engine 5 in time due to the failure of related electrical elements or inconvenient electric starting operation. The starting control system of the explosion-proof diesel engine adopts the electromagnetic unloading overflow valve 12 to realize the unloading starting of the hydraulic pump 4, reduces the starting instant power of the explosion-proof diesel engine 5, improves the hydraulic electric starting performance of the explosion-proof diesel engine 5, improves the success rate of restarting the explosion-proof diesel engine 5 in a low-temperature environment, saves the starting auxiliary time of the explosion-proof diesel engine 5, and improves the working efficiency of power equipment of the explosion-proof diesel engine. The explosion-proof diesel engine starting control system adopts the hydraulic control reversing valve I of the hydraulic pump 4 feedback control starting loop to realize that the oil supply to the hydraulic starting motor 6 is automatically cut off after the explosion-proof diesel engine 5 is successfully started, thereby preventing the hydraulic starting motor 6 from being damaged due to high-speed rotation and adding a safe and redundant design for the oil supply control of the hydraulic starting motor 6.

The explosion-proof diesel engine start control system provided by the application is described in detail above. Specific examples are set forth herein to illustrate the principles and embodiments of the present application, and the description of the examples above is only intended to assist in understanding the methods of the present application and their core ideas. It should be noted that it would be obvious to those skilled in the art that various improvements and modifications can be made to the present application without departing from the principles of the present application, and such improvements and modifications fall within the scope of the claims of the present application.

Claims

1. The starting control system of the explosion-proof diesel engine is characterized by comprising the explosion-proof diesel engine (5), an energy accumulator (19), a hydraulic oil tank (1) and a hydraulic starting motor (6) for driving the explosion-proof diesel engine (5) to operate; the energy accumulator (19) is connected with a liquid filling loop, a liquid supplementing loop and a starting loop; the liquid filling loop and the liquid supplementing loop are both connected to the hydraulic oil tank (1); the starting loop is connected with the explosion-proof diesel engine (5) and the hydraulic starting motor (6); the explosion-proof diesel engine (5) is connected into the fluid supplementing loop through a hydraulic pump (4); the accumulator (19) is connected to the fluid supplementing loop through a one-way valve (18); the energy accumulator (19) is connected to the starting loop through a hydraulic control one-way valve;

The starting loop comprises a motor control loop and a valve control loop; the motor control loop is connected with the hydraulic starting motor (6) to realize the control of the starting and stopping of the hydraulic starting motor (6); the valve control loop is connected with a valve control oil cylinder (8) of the explosion-proof diesel engine (5) so as to control the valve control oil cylinder (8) to start and stop; the motor control loop and the valve control loop are connected to the energy accumulator (19) through the hydraulic control one-way valve;

the hydraulic control check valve comprises a first hydraulic control valve group and a second hydraulic control valve group; the first hydraulic control valve group is connected to the valve control loop; the first hydraulic control valve group and the second hydraulic control valve group are connected in series and connected into the motor control loop;

the first hydraulic control valve group comprises a two-way cartridge valve I (202) and an electromagnetic reversing valve I (212); the second hydraulic control valve group comprises a two-way cartridge valve II (201) and an electromagnetic reversing valve II (211); the two-way cartridge valve I (202) and the two-way cartridge valve II (201) comprise an oil inlet, an oil outlet and a hydraulic control port; the energy accumulator (19) is connected with the oil inlet of the two-way cartridge valve I (202), the valve control loop and the oil inlet of the two-way cartridge valve II (201) are both connected with the oil outlet of the two-way cartridge valve I (202), and the oil outlet of the two-way cartridge valve II (201) is connected with the motor control loop; the electromagnetic directional valve I (212) is connected to the hydraulic control port of the two-way cartridge valve I (202), and the electromagnetic directional valve II (211) is connected to the hydraulic control port of the two-way cartridge valve II (201).

2. The explosion proof diesel engine start control system of claim 1, wherein the second pilot operated valve block further comprises a manual directional valve (22) and a shuttle valve I (112); the electromagnetic reversing valve II (211) and the manual reversing valve (22) are respectively connected to two shuttle valve inlets of the shuttle valve I (112), and a shuttle valve outlet of the shuttle valve I (112) is connected to a hydraulic control port of the two-way cartridge valve II (201).

3. The explosion-proof diesel engine start control system according to claim 2, wherein the electromagnetic directional valve I (212), the electromagnetic directional valve II (211), and the manual directional valve (22) each include a first valve port, a second valve port, and a third valve port; the first valve port and the second valve port of any one of the electromagnetic directional valve I (212), the electromagnetic directional valve II (211) and the manual directional valve (22) are alternately communicated with the third valve port;

the first valve port of the electromagnetic directional valve I (212) is connected with the energy accumulator (19), the second valve port of the electromagnetic directional valve I (212) is connected with the hydraulic oil tank (1), and the third valve port of the electromagnetic directional valve I (212) is connected with the hydraulic control port of the two-way cartridge valve I (202);

the electromagnetic directional valve II (211) and the manual directional valve (22) are both connected to the oil outlet of the two-way cartridge valve I (202), the electromagnetic directional valve II (211) and the manual directional valve (22) are both connected to the hydraulic oil tank (1), and the electromagnetic directional valve II (211) and the manual directional valve (22) are both connected to the two shuttle valve inlets of the shuttle valve I (112) respectively.

4. The explosion-proof diesel engine start control system according to claim 1, further comprising a pilot operated directional valve II (152) for connecting to a working circuit; the hydraulic control reversing valve II (152) comprises a first oil liquid port, a second oil liquid port, a third oil liquid port and a hydraulic control port; the first oil port of the hydraulic control reversing valve II (152) is connected with the oil outlet of the two-way cartridge valve I (202), the second oil port of the hydraulic control reversing valve II (152) is connected with the hydraulic oil tank (1), the third oil port of the hydraulic control reversing valve II (152) is used for connecting a working loop, and the hydraulic control port of the hydraulic control reversing valve II (152) is connected with the hydraulic pump (4);

the explosion-proof diesel engine (5) and the hydraulic pump (4) are used for controlling the first oil port and the second oil port of the hydraulic control reversing valve II (152) to be alternately communicated with the third oil port.

5. The explosion-proof diesel engine start control system according to any one of claims 1 to 4, characterized in that a pilot operated directional valve I (151) is provided between the motor control circuit and the hydraulic pump (4); the hydraulic control reversing valve I (151) comprises an oil inlet, an oil outlet, a non-through port and a hydraulic control port; the oil inlet of the hydraulic control reversing valve I (151) is connected with the oil outlet of the hydraulic control one-way valve, the oil outlet of the hydraulic control reversing valve I (151) is connected with the hydraulic starting motor (6), and the hydraulic control port of the hydraulic control reversing valve I (151) is connected with the hydraulic pump (4); the hydraulic pump (4) is used for controlling the oil outlet and the non-through port of the hydraulic control reversing valve I (151) to be alternately communicated with the oil inlet.

6. The explosion-proof diesel engine start control system according to claim 5, wherein any one of the oil inlet of the pilot operated check valve, the pilot operated port of the pilot operated directional valve I (151) and the inlet of the valve control cylinder (8) is provided with a damping element (10) for adjusting the oil flow rate.

7. The explosion-proof diesel engine start control system according to any one of claims 1 to 4, wherein the fluid-charging circuit and the fluid-charging circuit are both connected to the accumulator (19) through an electromagnetic unloading relief valve (12); the fluid infusion loop is provided with a pipeline filter (9); the pipeline filter (9) comprises:

a filter element for filtering oil;

the transmitter is used for detecting the oil operation parameters;