CN210565392U - Safety conversion braking constant speed reduction hydraulic system of elevator - Google Patents
Safety conversion braking constant speed reduction hydraulic system of elevator Download PDFInfo
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- CN210565392U CN210565392U CN201920858800.5U CN201920858800U CN210565392U CN 210565392 U CN210565392 U CN 210565392U CN 201920858800 U CN201920858800 U CN 201920858800U CN 210565392 U CN210565392 U CN 210565392U
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Abstract
The utility model discloses a constant deceleration hydraulic system and a braking method for safety conversion braking of a hoisting machine, wherein the system comprises an oil tank, a motor, a variable pump, an electromagnetic proportional overflow valve, a one-way valve, an energy accumulator, an electromagnetic overflow valve, a pressure reducing valve, a brake set, a plurality of electromagnetic directional valves and an electromagnetic proportional directional valve; the impact of the energy accumulator on the lifting system caused by rapid pressure rise in the braking process is avoided through different commutations of the electromagnetic proportional reversing valve, so that the oil pressure of the brake set is linearly and slowly reduced, and the lifting container is kept to be stably decelerated; when the constant deceleration fails, the system is immediately switched to secondary braking, the first pressure reducing valve and the second pressure reducing valve are arranged to ensure that the lifting system firstly reduces the pressure to a set secondary braking oil pressure value at a stable speed, so that the lifting machine is in a semi-braking state, and the pressure is reduced to zero after a period of time delay to realize complete braking. The braking mode can prevent the secondary braking from impacting a lifting system after the constant deceleration braking function fails, and the braking reliability is ensured.
Description
Technical Field
The utility model relates to a permanent speed reduction hydraulic pressure station of safe conversion braking suitable for lifting machine emergency braking, concretely relates to permanent speed reduction hydraulic system of lifting machine safe conversion braking and braking method belongs to mine winder technical field.
Background
In a coal mine production system, a mine hoisting system is an important component for ensuring the normal operation of a mine, and the reliability of a braking system directly influences the safe operation of mine hoisting equipment.
At present, a brake system used by the elevator is mostly a hydraulic disc brake, and braking is divided into working braking and safe braking. The working brake is realized by adjusting the oil pressure of the disc brake by adjusting the power supply voltage of the proportional overflow valve; the safety brake comprises a constant deceleration brake, a primary brake and a secondary brake, wherein the constant deceleration brake is used for adjusting the oil pressure of a disc brake by monitoring the speed closed-loop feedback of a hoist to adjust a proportional reversing valve or a proportional servo valve for reversing, so that a brake disc is slowly locked by a brake shoe, and the deceleration is maintained in a stable range; the first-stage braking is to adjust the oil pressure of the two groups of disc brakes to be zero and directly lock the brake discs with the maximum braking torque; the second-stage braking is to regulate the oil pressure of the disc brake to a second-stage braking pressure value, then reduce the oil pressure value to zero, and perform braking through two-stage oil pressure.
However, most of secondary braking oil pressure values are given when a hydraulic station is installed, after constant deceleration failure, no matter how large the oil pressure in a brake is, the secondary braking can stabilize the oil pressure at a set value, so that switching to the secondary braking process after the constant deceleration failure can be caused, the oil pressure can possibly rise due to the liquid supplementing effect of an energy accumulator, impact can be brought to a lifting system, the danger of rope breakage is increased, and safety accidents are brought.
Disclosure of Invention
In order to overcome various not enough that prior art exists, the utility model provides a permanent speed reduction hydraulic system of lifting machine safety conversion braking prevents that permanent speed reduction braking function inefficacy back second grade braking from leading to the fact the impact to lifting system, guarantees the reliability of braking.
In order to solve the problems, the utility model relates to a permanent speed reduction hydraulic system of lifting machine safety conversion braking, including the oil tank, including a motor, a variable pump, the energy storage ware, the solenoid directional valve group, brake group and pressure reducing valve group, the import of variable pump passes through the filter screen and links to each other with the oil tank, the export of variable pump passes through the filter screen and links to each other with the P mouth of solenoid directional valve G1, the T mouth of solenoid directional valve G1 links to each other with first energy storage ware through first check valve respectively, link to each other with the second energy storage ware through the second check valve, and link to each other with the B mouth of solenoid directional valve G6; a port P of the electromagnetic reversing valve G6 and a port P of the electromagnetic reversing valve G66 are connected with an oil inlet of a first brake valve in a brake bank, and a port P of the electromagnetic reversing valve G7 and a port P of the electromagnetic reversing valve G77 are connected with an oil inlet of a second brake valve in the brake bank; the port A of the electromagnetic directional valve G6 and the port A of the electromagnetic directional valve G66 are connected with the port P of the electromagnetic directional valve G2, the port P of the electromagnetic directional valve G22, the port P of the electromagnetic directional valve G3, the port P of the electromagnetic directional valve G33 and the port P of the electromagnetic directional valve G4; the port A of the electromagnetic directional valve G2 and the port A of the electromagnetic directional valve G22 are connected in parallel and then are connected with a first pressure reducing valve; the port A of the electromagnetic directional valve G3 and the port A of the electromagnetic directional valve G33 are connected in parallel and then are connected with a second pressure reducing valve; a third reducing valve is connected in parallel to an oil path communicated between the port P of the electromagnetic directional valve G4 and the port P of the electromagnetic directional valve G33; the set value of the first pressure reducing valve is smaller than the set value of the second pressure reducing valve, and the set value of the second pressure reducing valve is smaller than the set value of the third pressure reducing valve.
Furthermore, a T port of the electromagnetic directional valve G4 is connected with a P port of the electromagnetic directional valve G44, a T port of the electromagnetic directional valve G44 is connected with a B port of the electromagnetic proportional directional valve G5, the P port of the electromagnetic proportional directional valve G5 is connected in parallel with an oil path connected with the second energy accumulator and the second one-way valve, and the T port of the electromagnetic proportional directional valve G5 is connected with an oil tank through an electromagnetic overflow valve.
Further, the first accumulator is respectively connected with the port B of the electromagnetic directional valve G2 and the port B of the electromagnetic directional valve G22 through a first throttle valve, and is connected with the port B of the electromagnetic directional valve G3 and the port B of the electromagnetic directional valve G33 through a second throttle valve.
Furthermore, an oil inlet of an electromagnetic proportional overflow valve is connected in parallel to an oil path connected between an outlet of the variable displacement pump and a P port of the electromagnetic directional valve G1, and an oil outlet of the electromagnetic proportional overflow valve is connected with an oil tank through a radiator.
The electromagnetic directional valve G1, the electromagnetic directional valve G2, the electromagnetic directional valve G22, the electromagnetic directional valve G3, the electromagnetic directional valve G33, the electromagnetic directional valve G4, the electromagnetic directional valve G44, the electromagnetic directional valve G6, the electromagnetic directional valve G66, the electromagnetic directional valve G7 and the electromagnetic directional valve G77 are all provided with valve position monitoring sensors.
The T port of the electromagnetic directional valve G1, the inlets of the first energy accumulator and the second energy accumulator, the A port of the electromagnetic directional valve G and the oil inlet of the brake set are all provided with oil pressure sensors.
A braking method of a constant deceleration hydraulic system for safely switching braking of a hoist is characterized by comprising the following steps:
a) when the elevator brakes under the normal working state, the power supply voltage of the proportional overflow valve is gradually reduced from the working voltage to zero, the oil pressure is gradually reduced from the working oil pressure to residual pressure, the brake set is gradually switched on to reach the full braking state, and the elevator stops working;
b) when the lifting machine has a safety fault, the control motor 2 stops working, the electromagnetic directional valve G1 is powered off and is positioned on the right position, and the safety braking of the lifting machine is realized at different positions in the well according to different lifting containers, and the safety braking is as follows:
when the lifting container is positioned at a wellhead, the electromagnetic directional valve G7 and the electromagnetic directional valve G77 which are connected in parallel are immediately de-energized and switched to the right position, hydraulic oil of the brake group rapidly returns to the oil tank, the oil pressure rapidly drops to zero, a full braking state is achieved through primary braking, and immediate parking is achieved;
when the lifting container is positioned in a well, the electromagnetic directional valve G6 and the electromagnetic directional valve G66 which are connected in parallel are immediately de-energized and switched to the right position, the electromagnetic directional valve G7 and the electromagnetic directional valve G77 which are connected in parallel are not operated to maintain the left position state, the electromagnetic directional valve G2, the electromagnetic directional valve G22, the electromagnetic directional valve G3 and the electromagnetic directional valve G33 are not operated to maintain the left position state, and the oil pressure of a brake group is immediately reduced from the working oil pressure to the oil pressure set by the third reducing valve;
meanwhile, the electromagnetic directional valve G4 and the electromagnetic directional valve G44 lose power and are positioned at the right position, the electromagnetic proportional directional valve G5 continuously commutates left and right, when the electromagnetic proportional directional valve G5 is positioned at the right position, the second energy accumulator supplies liquid to the brake set to make up for overlarge deceleration value, when the electromagnetic proportional directional valve G5 is positioned at the left position, the oil liquid of the brake set flows back to the oil tank through the electromagnetic overflow valve to increase the deceleration value, so that the oil pressure of the brake set is linearly and slowly reduced, the deceleration of the lifting container is maintained in a stable range until the oil pressure is zero, and the lifting container is in a complete braking state;
c) the constant deceleration braking is realized by adjusting the power supply voltage of the electromagnetic proportional directional valve G5, and when the deceleration is too large or too small, the constant deceleration braking fails, the braking is immediately switched to the secondary braking: the electromagnetic directional valve G4 and the electromagnetic directional valve G44 are powered on and positioned at the left position, the system is blocked to perform constant deceleration braking, meanwhile, the electromagnetic directional valve G2 and the electromagnetic directional valve G22 are powered off or the electromagnetic directional valve G3 and the electromagnetic directional valve G33 are powered off and positioned at the right position, so that the oil pressure of a brake bank is reduced to be the set value of a first reducing valve or the set value of a second reducing valve, meanwhile, a first energy accumulator supplies liquid to the brake bank through a first throttle valve or a second throttle valve, the system is stabilized at a two-stage brake oil pressure value, the elevator is in a half-braking state, after 5 seconds of delay, the electromagnetic directional valve G7 and the electromagnetic directional valve G77 are powered off and positioned at the right position, so that the oil pressure of the brake bank is reduced to be zero, and the elevator.
Specifically, the secondary braking in the step c) is realized by the following two ways:
firstly, when the oil pressure value of the brake set is lower than the set value of the second reducing valve and higher than the set value of the first reducing valve, the electromagnetic directional valve G2 and the electromagnetic directional valve G22 are de-energized to execute low-oil-pressure secondary braking;
secondly, when the oil pressure value of the brake set is higher than the set value of the second reducing valve, the electromagnetic directional valve G3 and the electromagnetic directional valve G33 are de-energized, and high oil pressure secondary braking is executed.
The utility model avoids the impact of the energy accumulator on the lifting system caused by rapid pressure rise in the braking process through different commutations of the electromagnetic proportional directional valve, so that the oil pressure of the brake set is linearly and slowly reduced, and the lifting container is kept to be stably decelerated; when the constant deceleration fails, the system is immediately switched to secondary braking, the first pressure reducing valve and the second pressure reducing valve are arranged to ensure that the lifting system firstly reduces the pressure to a set secondary braking oil pressure value at a stable speed, so that the lifting machine is in a semi-braking state, and the pressure is reduced to zero after a period of time delay to realize complete braking. Compared with the conventional braking mode, the two-stage braking mode realized by the hydraulic system is safer and more reliable, the speed reduction process is more stable, the impact on a lifting system caused by too fast oil pressure reduction or sudden pressure supplement of an energy accumulator is avoided, and the two-stage braking oil pressure can be selectively braked after the constant pressure braking function fails.
Drawings
FIG. 1 is a schematic diagram of a hydraulic system of the present invention;
in the figure: 1. an oil tank; 2. a motor; 3. a variable displacement pump; 4. an electromagnetic proportional overflow valve; 5.1, a first one-way valve; 5.2, a second one-way valve; 6.1, a first accumulator; 6.2, a second accumulator; 7. an electromagnetic spill valve; 8.1, a first pressure reducing valve; 8.2, a second pressure reducing valve; 8.3, a third pressure reducing valve; 9.1 a first throttle valve; 9.2, a second throttle valve; 10. a valve position monitoring sensor; 11. an oil pressure sensor; 12. a brake set; the electromagnetic directional control valve comprises an electromagnetic directional valve G1, an electromagnetic directional valve G2, an electromagnetic directional valve G22, an electromagnetic directional valve G3, an electromagnetic directional valve G33, an electromagnetic directional valve G4, an electromagnetic directional valve G44, an electromagnetic proportional directional valve G5, an electromagnetic directional valve G6, an electromagnetic directional valve G66, an electromagnetic directional valve G7 and an electromagnetic directional valve G77.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, a constant deceleration hydraulic system for safety conversion braking of an elevator comprises an oil tank 1, a motor 2, a variable pump 3, an energy accumulator, an electromagnetic directional valve set, a brake set and a pressure reducing valve set, wherein an inlet of the variable pump 3 is connected with the oil tank 1 through a filter screen, an outlet of the variable pump 3 is connected with a port P of an electromagnetic directional valve G1 through a filter screen, an oil inlet of an electromagnetic proportional overflow valve 4 is connected in parallel to an oil path connected between an outlet of the variable pump 3 and the port P of the electromagnetic directional valve G1, and an oil outlet of the electromagnetic proportional overflow valve 4 is connected with the oil tank through a radiator;
the T port of the electromagnetic directional valve G1 is respectively connected with the first energy accumulator 6.1 through the first one-way valve 5.1, connected with the second energy accumulator 6.2 through the second one-way valve 5.2 and connected with the B port of the electromagnetic directional valve G6; a port P of the electromagnetic directional valve G6 and a port P of the electromagnetic directional valve G66 are connected with an oil inlet of a first brake valve in the brake bank 12, a port P of the electromagnetic directional valve G7 and a port P of the electromagnetic directional valve G77 are connected with an oil inlet of a second brake valve in the brake bank 12, and a port T of the electromagnetic directional valve G6, a port T of the electromagnetic directional valve G66, a port T of the electromagnetic directional valve G7 and a port T of the electromagnetic directional valve G77 all return oil to an oil tank; the port A of the electromagnetic directional valve G6 and the port A of the electromagnetic directional valve G66 are connected with the port P of the electromagnetic directional valve G2, the port P of the electromagnetic directional valve G22, the port P of the electromagnetic directional valve G3, the port P of the electromagnetic directional valve G33 and the port P of the electromagnetic directional valve G4; the port A of the electromagnetic directional valve G2 and the port A of the electromagnetic directional valve G22 are connected in parallel and then are connected with a first pressure reducing valve 8.1; the port A of the electromagnetic directional valve G3 and the port A of the electromagnetic directional valve G33 are connected in parallel and then are connected with a second pressure reducing valve 8.2; a third reducing valve 8.3 is connected in parallel to an oil path communicated between the port P of the electromagnetic directional valve G4 and the port P of the electromagnetic directional valve G33; the set value of the first reducing valve 8.1 is smaller than the set value of the second reducing valve 8.2, and the set value of the second reducing valve 8.2 is smaller than the set value of the third reducing valve 8.3;
the T port of the electromagnetic directional valve G4 is connected with the P port of the electromagnetic directional valve G44, the T port of the electromagnetic directional valve G44 is connected with the B port of the electromagnetic proportional directional valve G5, the P port of the electromagnetic proportional directional valve G5 is connected in parallel with an oil path of the second energy accumulator 6.2 connected with the one-way valve 5.2, and the T port of the electromagnetic proportional directional valve G5 is connected with an oil tank through an electromagnetic overflow valve 7.
The opening degree of the electromagnetic proportional reversing valve G5 is adjusted by adjusting the voltage of the electromagnetic proportional reversing valve G5, so that the braking speed is adjusted; through the different commutations of electromagnetism proportional reversing valve G5, prevent to step down too fast or boost suddenly and to the impact that the lift system caused, avoid the emergence of incident.
The first accumulator 6.1 is respectively connected with the port B of the electromagnetic directional valve G2 and the port B of the electromagnetic directional valve G22 through a first throttle valve 9.1, and is connected with the port B of the electromagnetic directional valve G3 and the port B of the electromagnetic directional valve G33 through a second throttle valve 9.2.
The first accumulator 6.1 supplies fluid to the brake set 12 through two sets of electromagnetic directional valves, so that the second-stage oil pressure brake can be selected in the second-stage braking process.
The electromagnetic directional valve G1, the electromagnetic directional valve G2, the electromagnetic directional valve G22, the electromagnetic directional valve G3, the electromagnetic directional valve G33, the electromagnetic directional valve G4, the electromagnetic directional valve G44, the electromagnetic directional valve G6, the electromagnetic directional valve G66, the electromagnetic directional valve G7 and the electromagnetic directional valve G77 are all provided with valve position monitoring sensors 10.
The T port of the electromagnetic directional valve G1, the inlets of the first energy accumulator 6.1 and the second energy accumulator 6.2, the A port of the electromagnetic directional valve G6 and the oil inlet of the brake set 12 are all provided with an oil pressure sensor 11.
Before normal work, the motor 2 is started, the electromagnetic directional valve G6 is powered off and is positioned at the right position, the electromagnetic directional valve G1, the electromagnetic directional valve G2, the electromagnetic directional valve G22, the electromagnetic directional valve G3, the electromagnetic directional valve G33, the electromagnetic directional valve G4, the electromagnetic directional valve G44, the electromagnetic directional valve G66, the electromagnetic directional valve G7 and the electromagnetic directional valve G77 are powered on and positioned at the left position, and the electromagnetic proportional directional valve G5 is positioned at the middle position and does not act; the pressure oil pumped by the variable pump 3 is regulated by the proportional overflow valve 4 and is respectively filled into the first energy accumulator 6.1 and the second energy accumulator 6.2 through the first check valve 5.1 and the second check valve 5.2 until the pressure oil reaches the size set by the oil pressure sensor 11, the opening of the proportional overflow valve 4 is opened to the maximum, the oil filling is finished, and the system can normally work.
When the electromagnetic proportional reversing valve G5 works normally, the electromagnetic reversing valve G1, the electromagnetic reversing valve G2, the electromagnetic reversing valve G22, the electromagnetic reversing valve G3, the electromagnetic reversing valve G33, the electromagnetic reversing valve G4, the electromagnetic reversing valve G44, the electromagnetic reversing valve G6, the electromagnetic reversing valve G66, the electromagnetic reversing valve G7 and the electromagnetic reversing valve G77 are all electrified and are in the left position, and the electromagnetic proportional reversing valve G5 is in the middle position and does not act; the power supply voltage of the proportional overflow valve 4 is gradually adjusted to the working voltage, the brake set 12 is slowly opened, the oil pressure gradually rises to the working oil pressure, and the system enters normal operation.
A braking method of a constant deceleration hydraulic system for safe switching braking of a hoist comprises the following steps:
a) when the elevator brakes in a normal working state, the power supply voltage of the proportional overflow valve 4 is gradually reduced from the working voltage to zero, the oil pressure is gradually reduced from the working oil pressure to residual pressure, the brake set 12 is gradually switched on to reach a full braking state, and the elevator stops working;
b) when the lifting machine has a safety fault, the control motor 2 stops working, the electromagnetic directional valve G1 is powered off and is positioned on the right position, and the safety braking of the lifting machine is realized at different positions in the well according to different lifting containers, and the safety braking is as follows:
when the lifting container is positioned at a wellhead, the electromagnetic directional valve G7 and the electromagnetic directional valve G77 which are connected in parallel are immediately de-energized and are switched to the right position, hydraulic oil of the brake group 12 rapidly returns to the oil tank, the oil pressure rapidly drops to zero, a full braking state is achieved through primary braking, and immediate parking is achieved;
when the lifting container is positioned in a well, the electromagnetic directional valve G6 and the electromagnetic directional valve G66 which are connected in parallel are immediately de-energized and switched to the right position, the electromagnetic directional valve G7 and the electromagnetic directional valve G77 which are connected in parallel are not operated to maintain the left position state, the electromagnetic directional valve G2, the electromagnetic directional valve G22, the electromagnetic directional valve G3 and the electromagnetic directional valve G33 are not operated to maintain the left position state, and the oil pressure of the brake group 12 is immediately reduced from the working oil pressure to the oil pressure set by the third reducing valve 8.3;
meanwhile, the electromagnetic directional valve G4 and the electromagnetic directional valve G44 lose power and are positioned at the right position, the electromagnetic proportional directional valve G5 continuously commutates left and right, when the electromagnetic proportional directional valve G5 is positioned at the right position, the second energy accumulator 6.2 supplies fluid to the brake set 12 to make up for overlarge deceleration value, when the electromagnetic proportional directional valve G5 is positioned at the left position, the fluid in the brake set 12 flows back to the oil tank through the electromagnetic overflow valve 7 to increase the deceleration value, so that the oil pressure of the brake set 12 is linearly and slowly reduced, the deceleration of the lifting container is maintained in a stable range until the oil pressure is zero, and the lifting container is in a complete braking state;
c) the constant deceleration braking is realized by adjusting the power supply voltage of the electromagnetic proportional directional valve G5, and when the deceleration is too large or too small, the constant deceleration braking fails, the braking is immediately switched to the secondary braking: the electromagnetic directional valve G4 and the electromagnetic directional valve G44 are powered on and positioned at the left position, a blocking system performs constant deceleration braking, meanwhile, the electromagnetic directional valve G2 and the electromagnetic directional valve G22 are powered off or the electromagnetic directional valve G3 and the electromagnetic directional valve G33 are powered off and positioned at the right position, so that the oil pressure of the brake bank 12 is reduced to the set value of the first reducing valve 8.1 or the set value of the second reducing valve 8.2, meanwhile, the first energy accumulator 6.1 supplies liquid to the brake bank 12 through the first throttle valve 9.1 or the second throttle valve 9.2, the system is stabilized at a two-stage brake oil pressure value, the elevator is in a half-braking state, after 5 seconds of delay, the electromagnetic directional valve G7 and the electromagnetic directional valve G77 are powered off and positioned at the right position, so that the oil pressure of the brake bank 12 is reduced to zero, and the elevator performs full braking.
Specifically, the secondary braking in the step c) is realized by the following two ways:
firstly, when the oil pressure value of the brake set 12 is lower than the set value of the second reducing valve 8.2 and higher than the set value of the first reducing valve 8.1, the electromagnetic directional valve G2 and the electromagnetic directional valve G22 are de-energized to execute low-oil pressure secondary braking;
secondly, when the oil pressure value of the brake set 12 is higher than the set value of the second reducing valve 8.2, the electromagnetic directional valve G3 and the electromagnetic directional valve G33 are de-energized, and high oil pressure secondary braking is executed.
Claims (6)
1. A constant deceleration hydraulic system for safety conversion braking of a hoist comprises an oil tank (1), a motor (2), a variable pump (3), an energy accumulator, an electromagnetic directional valve set and a brake gate set, and is characterized by further comprising a pressure reducing valve set, wherein an inlet of the variable pump (3) is connected with the oil tank (1) through a filter screen, an outlet of the variable pump (3) is connected with a port P of an electromagnetic directional valve (G1) through a filter screen, a port T of the electromagnetic directional valve (G1) is respectively connected with the first energy accumulator (6.1) through a first one-way valve (5.1), connected with the second energy accumulator (6.2) through a second one-way valve (5.2) and connected with a port B of the electromagnetic directional valve (G6); a port P of the electromagnetic directional valve (G6) and a port P of the electromagnetic directional valve (G66) are connected with oil inlets of a first brake valve in the brake bank (12), and a port P of the electromagnetic directional valve (G7) and a port P of the electromagnetic directional valve (G77) are connected with oil inlets of a second brake valve in the brake bank (12); the port A of the electromagnetic directional valve (G6), the port A of the electromagnetic directional valve (G66) are connected with the port P of the electromagnetic directional valve (G2), the port P of the electromagnetic directional valve (G22), the port P of the electromagnetic directional valve (G3), the port P of the electromagnetic directional valve (G33) and the port P of the electromagnetic directional valve (G4); the port A of the electromagnetic directional valve (G2) and the port A of the electromagnetic directional valve (G22) are connected in parallel and then are connected with the first pressure reducing valve (8.1); the port A of the electromagnetic directional valve (G3) and the port A of the electromagnetic directional valve (G33) are connected in parallel and then are connected with a second pressure reducing valve (8.2); a third reducing valve (8.3) is connected in parallel to an oil path communicated between the port P of the electromagnetic directional valve (G4) and the port P of the electromagnetic directional valve (G33); the set value of the first pressure reducing valve (8.1) is smaller than the set value of the second pressure reducing valve (8.2), and the set value of the second pressure reducing valve (8.2) is smaller than the set value of the third pressure reducing valve (8.3).
2. The constant deceleration hydraulic system for the safety conversion braking of the hoisting machine as claimed in claim 1, characterized in that the port T of the electromagnetic directional valve (G4) is connected with the port P of the electromagnetic directional valve (G44), the port T of the electromagnetic directional valve (G44) is connected with the port B of the electromagnetic proportional directional valve (G5), the port P of the electromagnetic proportional directional valve (G5) is connected in parallel with the oil path connecting the second accumulator (6.2) and the second check valve (5.2), and the port T of the electromagnetic proportional directional valve (G5) is connected with the oil tank through the electromagnetic overflow valve (7).
3. The elevator safety transition braking constant deceleration hydraulic system as claimed in claim 2, characterized in that the accumulator (6.1) is connected to port B of the electromagnetic directional valve (G2) and port B of the electromagnetic directional valve (G22) through the first throttle valve (9.1) and is connected to port B of the electromagnetic directional valve (G3) and port B of the electromagnetic directional valve (G33) through the second throttle valve (9.2), respectively.
4. The constant deceleration hydraulic system for the safe conversion braking of the hoisting machine as claimed in claim 3, characterized in that the oil inlet of the electromagnetic proportional relief valve (4) is connected in parallel to the oil path connected between the outlet of the variable displacement pump (3) and the port P of the electromagnetic directional valve (G1), and the oil outlet of the electromagnetic proportional relief valve (4) is connected with the oil tank through a radiator.
5. The constant deceleration hydraulic system for the safety conversion braking of the hoisting machine as claimed in any one of claims 1 to 4, characterized in that the electromagnetic directional valve (G1), the electromagnetic directional valve (G2), the electromagnetic directional valve (G22), the electromagnetic directional valve (G3), the electromagnetic directional valve (G33), the electromagnetic directional valve (G4), the electromagnetic directional valve (G44), the electromagnetic directional valve (G6), the electromagnetic directional valve (G66), the electromagnetic directional valve (G7) and the electromagnetic directional valve (G77) are all provided with a valve position monitoring sensor (10).
6. The constant deceleration hydraulic system for the safety conversion braking of the hoisting machine as claimed in claim 5, characterized in that the T port of the electromagnetic directional valve (G1), the inlets of the first accumulator (6.1) and the second accumulator (6.2), the A port of the electromagnetic directional valve (G6) and the oil inlet of the brake group (12) are provided with oil pressure sensors (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920858800.5U CN210565392U (en) | 2019-06-10 | 2019-06-10 | Safety conversion braking constant speed reduction hydraulic system of elevator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920858800.5U CN210565392U (en) | 2019-06-10 | 2019-06-10 | Safety conversion braking constant speed reduction hydraulic system of elevator |
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| CN210565392U true CN210565392U (en) | 2020-05-19 |
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| CN201920858800.5U Expired - Fee Related CN210565392U (en) | 2019-06-10 | 2019-06-10 | Safety conversion braking constant speed reduction hydraulic system of elevator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110219836A (en) * | 2019-06-10 | 2019-09-10 | 徐州大恒测控技术有限公司 | A kind of mine hoist safety switching brake perseverance deceleration hydraulic system and braking method |
| CN114889570A (en) * | 2022-05-07 | 2022-08-12 | 内蒙古北方重型汽车股份有限公司 | Electric control brake control system for mining vehicle and use method thereof |
-
2019
- 2019-06-10 CN CN201920858800.5U patent/CN210565392U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110219836A (en) * | 2019-06-10 | 2019-09-10 | 徐州大恒测控技术有限公司 | A kind of mine hoist safety switching brake perseverance deceleration hydraulic system and braking method |
| CN110219836B (en) * | 2019-06-10 | 2023-12-26 | 徐州大恒测控技术有限公司 | Safety switching braking constant-speed-reduction hydraulic system and braking method for elevator |
| CN114889570A (en) * | 2022-05-07 | 2022-08-12 | 内蒙古北方重型汽车股份有限公司 | Electric control brake control system for mining vehicle and use method thereof |
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