CN211198430U

CN211198430U - Winding control system of overhead working truck

Info

Publication number: CN211198430U
Application number: CN201921938612.XU
Authority: CN
Inventors: 郑军
Original assignee: Hangzhou Aichi Engineering Vehicles Co Ltd
Current assignee: Hangzhou Aichi Engineering Vehicles Co Ltd
Priority date: 2019-11-12
Filing date: 2019-11-12
Publication date: 2020-08-07
Anticipated expiration: 2029-11-12

Abstract

The utility model relates to an aerial working car hoist control system, including hoist control valve, solenoid valve, hoist motor, stopper and reel, characteristics are: the winch control valve comprises a one-way valve, a sequence valve and a hydraulic control reversing valve, the one-way valve and the sequence valve are connected in parallel to form a balance valve and then are connected in series between a V1 port and a C1 port, the hydraulic control reversing valve is a three-position four-way reversing valve and is connected in parallel between a V1 port, a C1 port, a V2 port and a C2 port, the electromagnetic valve is a three-position four-way electromagnetic valve and is installed between the hydraulic control reversing valve and an oil pump, the winch motor is connected with the winch control valve and a winding drum, and the brake is. The utility model discloses utilize the hydraulic control switching-over valve to establish the logical relation of A mouth, B mouth, Dr mouth and K mouth, realize high-efficient, reliable regulation and control to the hoist stopper, utilize the balanced heavy load that hangs of balanced valve, guarantee the motion stability of hoist motor, have simple structure, control advantage such as nimble, reliable safety, economic nature are good, easy popularization implementation.

Description

Winding control system of overhead working truck

Technical Field

The utility model belongs to the technical field of high altitude construction equipment, concretely relates to high altitude construction car hoist control system, mainly used high altitude construction car.

Background

When the overhead working truck is used, articles are transferred to the ground by a hydraulic winch which is usually arranged on a working platform and consists of a hydraulic motor, a planetary gear, a brake, a winch control valve and the like. In the process of hoisting the hydraulic winch, the motor is under the action of pulling force applied to the motor by a hoisted object, and in order to prevent the motor from moving in an accelerating way under the action of the pulling force, a balance valve is usually arranged in a hydraulic system to maintain the pressure stability in the hydraulic system and balance the pulling force; in the process of the hydraulic hoisting and hoisting of the crane, the hoisting brake is mainly used for maintaining the crane to be free from sliding downwards. However, in the actual aloft work process, the hoisting brake is influenced by factors such as long system pipelines, large system oil return pressure and the like, and sometimes can be automatically opened in the hoisting static process to cause the hoisting weight to slide down, so that great potential safety hazards are generated. Therefore, it is desirable to design a new hoisting control system for an aerial work platform, which can realize efficient and reliable regulation and control of a hoisting brake so as to improve the working safety of the hoisting when the hoisting is used at high altitude or in long-distance pipelines.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the above-mentioned not enough that exists among the prior art, and provide a simple structure, control flexibility, reliable safe, economic good high altitude construction car hoist control system.

The utility model provides a technical scheme that above-mentioned problem adopted is: this high altitude construction car hoist control system, including hoist control valve, solenoid valve, hoist motor, stopper and reel, its characterized in that: the winch control valve comprises a one-way valve, a sequence valve and a hydraulic control reversing valve, the one-way valve and the sequence valve are connected in parallel to form a balance valve, the balance valve is connected between V1 and C1 ports in series, and the hydraulic control reversing valve is connected between V1 and C1 ports and V2 and C2 ports in parallel; the solenoid valve is installed between hoist control valve and oil pump, the hoist motor is connected with the hoist control valve, and the U mouth and the C1 mouth of hoist motor are connected, and the D mouth and the C2 mouth of hoist motor are connected, the U mouth and the D mouth of hoist motor control respectively the hoist and rotate along opposite direction, install the stopper on the hoist motor, the stopper links to each other with the K mouth of hydraulically controlled switching-over valve to be connected with the oil tank through the Dr mouth of hydraulically controlled switching-over valve when the hydraulically controlled switching-over valve is in the meso position, the reel is connected to the hoist motor, and the reel carries out clockwise or anticlockwise rotation under the hoist motor effect. When the winch works, the hoisting weight is hung on the winding drum through the rope, the winding drum drives the hoisting weight to ascend or descend when rotating, the winch control valve controls the movement of the winch motor by controlling the winch brake, the winding drum is static or rotates under the action of the winch motor, the rotation direction of the winding drum can be changed by switching the working state of a hydraulic control reversing valve in the winch control valve, and the electromagnetic valve can control the on-off of an oil path or the direction of the oil path of a switching system. When the hydraulic control reversing valve is positioned at the middle position, the brake is connected with the oil tank through the K port and the Dr port, and control oil in the brake directly flows back to the oil tank, so that the locking reliability of the brake is ensured.

Preferably, the inlet of the check valve of the present invention is connected to the port V1, the outlet of the check valve is connected to the port C1, and the installation direction of the sequence valve is opposite to the installation direction of the check valve. When the V1 port is an oil inlet, hydraulic oil can only be introduced into the C1 port along the check valve, and the function of preventing the hydraulic oil from flowing back is achieved; when the V1 is an oil outlet, hydraulic oil cannot flow out of the one-way valve and only can flow out of the sequence valve in the direction opposite to the installation direction of the one-way valve after the pressure exceeds the set pressure value of the sequence valve.

Preferably, the sequence valve of the present invention is an internal control sequence valve. Because the pressure of the main oil circuit is not high, the sequence valve can be selected in an internal control mode, oil is directly taken through the main oil circuit, the sequence valve plays a role of a back pressure valve when the hoisting motor performs descending operation, and pressure difference is formed at two ends of the sequence valve and used for balancing load applied by a hoisting weight, so that the motor rotates at a set speed and the descending speed is controlled.

Preferably, the solenoid valve of the utility model is a three-position four-way solenoid valve, and when the solenoid valve is in the middle position, the oil inlet P is disconnected; when the electromagnetic valve is in a first working state, the oil inlet P is connected with the port A, and the oil outlet T is connected with the port B; when the electromagnetic valve is in a second working state, the oil inlet P is connected with the port B, and the oil outlet T is connected with the port A. When the electromagnetic valve is in the middle position, the oil inlet P is disconnected, and the hoisting motor keeps static; when the electromagnetic valve is in a first working state, hydraulic oil flows in from a U port of the hoisting motor along a port P, a port A, V1 and C1, so that the hoisting performs ascending operation; when the electromagnetic valve is in a second working state, hydraulic oil flows from a port D of the hoisting motor along ports P, B, V1 and C1, so that the hoisting machine performs descending operation.

Preferably, the utility model discloses a hydraulic control switching-over valve is interior accuse formula tribit four-way reversing valve, and when hydraulic control switching-over valve was in first operating condition, K mouthful and V1 mouth linked to each other, and when hydraulic control switching-over valve was in second operating condition, K mouthful and V2 mouth linked to each other. The first working state and the second working state of the hydraulic control reversing valve correspond to the first working state and the second working state of the electromagnetic valve, and when the hydraulic control reversing valve and the electromagnetic valve are both in the first working state, hydraulic oil flows into the brake from the V1 port through the hydraulic control reversing valve and the K port to open the brake; when the hydraulic brake is in the second working state, hydraulic oil flows into the brake from the V2 port through the hydraulic control reversing valve and the K port, and the brake is opened.

Compared with the prior art, the utility model, have following advantage and effect: the utility model utilizes the hydraulic control reversing valve to balance the influence of the pressure of the port A and the port B on the port K, improves the use reliability and the safety of the controller, utilizes the hydraulic control reversing valve and the electromagnetic valve to work in a matching way to realize the switching of the ascending and descending processes of the hoisting motor, is provided with the balance valve to balance the hoisting load, and ensures the stable rotating speed of the hoisting motor; and the system has simple structure, flexible control, good economy and easy popularization and implementation.

Drawings

In order to illustrate the embodiments of the present invention or the solutions in the prior art more clearly, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a winch control valve according to an embodiment of the present invention.

Fig. 3 is a schematic diagram of a hydraulic hoisting structure according to an embodiment of the present invention.

Fig. 4 is a state diagram of use of an embodiment of the present invention.

Description of reference numerals: 1. a winch control valve; 2. an electromagnetic valve; 3. a hoist motor; 4. a brake; 5. a reel; 6. a one-way valve; 7. a sequence valve; 8. a hydraulic control directional control valve; 9. an oil tank; 10. hoisting; 11. hydraulic hoisting; 12. a working arm; 13. a manned working bucket; 14. a small boom.

Detailed Description

The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.

Examples are given.

Referring to fig. 1 to 4, the winding control system of the aerial work platform of the embodiment includes a winding control valve 1, an electromagnetic valve 2, a winding motor 3, a brake 4 and a winding drum 5.

The winch control valve 1 of the embodiment comprises a check valve 6, a sequence valve 7 and a hydraulic control reversing valve 8, wherein the check valve 6 and the sequence valve 7 are connected in parallel to form a balance valve, the balance valve is connected in series on an oil path between a V1 port and a C1 port, an inlet of the check valve 6 is connected with a V1 port, an outlet of the check valve 6 is connected with a C1 port, the installation direction of the sequence valve 7 is opposite to that of the check valve 6, an inlet of the sequence valve 7 is connected with a C1 port, and an outlet of the sequence valve is connected with a V1 port. The hydraulic control reversing valve 8 is connected in parallel between the ports V1 and C1, V2 and C2, the hydraulic control reversing valve 8 is an internal control type three-position four-way reversing valve, an inlet is connected with the port V1 and the port V2, an outlet is connected with the port K and the port Dr, when the hydraulic control reversing valve 8 is in a neutral position, the port K is connected with the port Dr, when the hydraulic control reversing valve 8 is in a first working state, the port K is connected with the port V1, and when the hydraulic control reversing valve 8 is in a second working state, the port K is connected with the port V2.

Install solenoid valve 2 between the hoist control valve 1 and the oil pump of this embodiment, this solenoid valve 2 is three-position four-way solenoid valve, its entry links to each other with oil inlet P and oil-out T respectively, the export links to each other with A mouth and B mouth respectively, when solenoid valve 2 is in the meso position, oil inlet P disconnection, A mouth and B mouth link to each other with oil-out T simultaneously, when solenoid valve 2 is in first operating condition, oil inlet P links to each other with A mouth, oil-out T links to each other with B mouth, when solenoid valve 2 is in the second operating condition, oil inlet P links to each other with B mouth, oil-out T links to each other with A mouth.

The hoist motor 3 of this embodiment is connected with hoist controller 1 to the U mouth and the C1 mouth of hoist motor 3 are connected, and the D mouth and the C2 mouth of book are connected, and the U mouth and the D mouth of hoist motor 3 control the motor respectively and rotate along different directions, install the stopper 4 that is used for controlling the motor motion on the hoist motor 3, and stopper 4 links to each other with the K mouth of hoist control valve 1, relies on the hydraulic oil that flows in from the K mouth to work. The hoisting motor 3 is further connected with a winding drum 5, the winding drum 5 is suspended with a hoisting weight 10 through a rope, and when the winding drum 5 is driven by the hoisting motor 3 to rotate clockwise or anticlockwise, the hoisting weight 10 is driven to ascend or descend.

In the embodiment, when the lifting operation is performed, the electromagnetic valve 2 and the hydraulic control directional valve 8 are switched to the first working state, hydraulic oil flows into the port V1 from the port a, one part of the hydraulic oil flows into the brake 4 through the port K of the hydraulic control directional valve 8, so that the maker 4 starts to work, the other part of the hydraulic oil flows to the port C1 along the one-way valve 1, finally, the spool 5 is driven by the port U entering the hoisting motor 3 to rotate, so that the hoisting weight 10 is lifted, and the one-way valve 1 is used for preventing the hydraulic oil at the port C1 from flowing back.

In the embodiment, when the descending operation is executed, the electromagnetic valve 2 and the pilot-controlled directional valve 8 are switched to the second working state, hydraulic oil flows into the port V2 from the port B, one part of the hydraulic oil flows into the brake 4 through the port K of the pilot-controlled directional valve 8, so that the maker 4 starts to work, the other part of the hydraulic oil enters the port D of the hoisting motor 3 along the port C2, the winding drum 5 is driven to rotate in the reverse direction, so that the hoist 10 descends, the hydraulic oil flowing out from the port U of the hoisting motor 3 can only flow out through the sequence valve 7 under the action of the balance valve, the sequence valve 7 can form a pressure difference at two ends of the sequence valve 7, and when the pressure at the inlet of the sequence valve 7 exceeds a set pressure value, the hydraulic oil can only flow out along the sequence valve 7, so that the load applied by the hoist 10 can be balanced, the hoisting motor 3 can rotate.

In the embodiment, when the hoisting weight 10 is still in the mid-air, the hydraulic control reversing valve 8 is reset, the port K is connected with the port Dr, and the control oil of the brake 4 directly flows into the oil tank 9 through the port K and the port Dr, so that the brake 4 is ensured to be locked reliably.

The hoist control system of the embodiment is generally used for simplifying the process of transferring articles from the manned working bucket 13 of the aerial work platform to the ground, specifically, the hydraulic hoist 11 is installed at the connecting position of the working arm 12 of the aerial work platform and the manned working bucket 13 and is connected with the small suspension arm 14, the winding drum 5 is located at the front end of the small suspension arm 14, when in use, the articles are hoisted on the small suspension arm 14, and an operator controls the hydraulic hoist 11 through an operation platform located on the manned working bucket 13, so that the small suspension arm 14 performs operations such as rotation, lifting and the like.

In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above description is only an example of the structure of the present invention. All the equivalent changes or simple changes made according to the structure, characteristics and principle of the utility model are included in the protection scope of the utility model. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.

Claims

1. The utility model provides an aerial working car hoist control system, includes hoist control valve (1), solenoid valve (2), hoist motor (3), stopper (4) and reel (5), its characterized in that: the winch control valve (1) comprises a one-way valve (6), a sequence valve (7) and a hydraulic control reversing valve (8), wherein the one-way valve (6) and the sequence valve (7) are connected in parallel to form a balance valve, the balance valve is connected between ports V1 and C1 in series, and the hydraulic control reversing valve (8) is connected between ports V1 and C1 and ports V2 and C2 in parallel; the electromagnetic valve (2) is installed between a winch control valve (1) and an oil pump, the winch motor (3) is connected with the winch control valve (1), a U port of the winch motor (3) is connected with a C1 port, a D port of the winch motor (3) is connected with a C2 port, the U port and the D port of the winch motor (3) respectively control the winch to rotate in opposite directions, a brake (4) is installed on the winch motor (3), the brake (4) is connected with a K port of a hydraulic control reversing valve (8), and the Dr port of the hydraulic control reversing valve (8) is connected with an oil tank (9) when the hydraulic control reversing valve (8) is located at a middle position, the winch motor (3) is connected with a winding drum (5), and the winding drum (5) rotates clockwise or anticlockwise under the action of the winch motor (3).

2. The aerial cage hoisting control system of claim 1, wherein: the inlet of the check valve (6) is connected with the port V1, the outlet of the check valve (6) is connected with the port C1, and the installation direction of the sequence valve (7) is opposite to that of the check valve (6).

3. The aerial cage hoisting control system of claim 1, wherein: the sequence valve (7) is an internal control type sequence valve.

4. The aerial cage hoisting control system of claim 1, wherein: the electromagnetic valve (2) is a three-position four-way electromagnetic valve, when the electromagnetic valve (2) is positioned at a middle position, the oil inlet P is disconnected, when the electromagnetic valve (2) is positioned at a first working state, the oil inlet P is connected with the port A, the oil outlet T is connected with the port B, when the electromagnetic valve (2) is positioned at a second working state, the oil inlet P is connected with the port B, and the oil outlet T is connected with the port A.

5. The aerial cage hoisting control system of claim 1, wherein: the hydraulic control reversing valve (8) is an internal control type three-position four-way reversing valve, when the hydraulic control reversing valve (8) is in a first working state, the K port is connected with the V1 port, and when the hydraulic control reversing valve (8) is in a second working state, the K port is connected with the V2 port.