CN115402278A - Gravity sensing valve and coal mine hydrostatic drive vehicle safety parking control system - Google Patents

Gravity sensing valve and coal mine hydrostatic drive vehicle safety parking control system Download PDF

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Publication number
CN115402278A
CN115402278A CN202211206530.2A CN202211206530A CN115402278A CN 115402278 A CN115402278 A CN 115402278A CN 202211206530 A CN202211206530 A CN 202211206530A CN 115402278 A CN115402278 A CN 115402278A
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CN
China
Prior art keywords
valve
gravity sensing
port
brake
control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202211206530.2A
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Chinese (zh)
Inventor
马艳卫
王治伟
韦建龙
王晓
范江鹏
赵瑞萍
贾二虎
陈利东
仇博
杨建勇
程玉军
田舒
闫晓刚
高东漓
张国栋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Taiyuan Institute of China Coal Technology and Engineering Group
Shanxi Tiandi Coal Mining Machinery Co Ltd
Original Assignee
Taiyuan Institute of China Coal Technology and Engineering Group
Shanxi Tiandi Coal Mining Machinery Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Taiyuan Institute of China Coal Technology and Engineering Group, Shanxi Tiandi Coal Mining Machinery Co Ltd filed Critical Taiyuan Institute of China Coal Technology and Engineering Group
Priority to CN202211206530.2A priority Critical patent/CN115402278A/en
Publication of CN115402278A publication Critical patent/CN115402278A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T7/00—Brake-action initiating means
    • B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
    • B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
    • B60T11/103—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic in combination with other control devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/18—Safety devices; Monitoring
    • B60T17/22—Devices for monitoring or checking brake systems; Signal devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D1/00—Steering controls, i.e. means for initiating a change of direction of the vehicle
    • B62D1/02—Steering controls, i.e. means for initiating a change of direction of the vehicle vehicle-mounted
    • B62D1/12—Hand levers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
    • B62D5/07—Supply of pressurised fluid for steering also supplying other consumers ; control thereof

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)

Abstract

The invention belongs to the technical field of parking of coal mine hydrostatic drive vehicles, and solves the problem of potential safety hazards such as vehicle sliding and the like caused by the fact that a driver does not park according to the regulations. The gravity sensing valve comprises a valve seat, a valve core, a valve body and a reset spring, wherein the top of the valve core is connected with a gravity sensing rod, the gravity sensing rod receives a load action, and the stroke range of the gravity sensing rod under the load action is more than or equal to the reversing stroke of the valve core; the coal mine hydrostatic drive vehicle safety parking control system comprises a gravity sensing valve, wherein the gravity sensing valve is connected with a brake control valve in series, and an A port of the gravity sensing valve is connected with a control end of a brake reversing valve, a left reversing valve and a right reversing valve of a vehicle. The invention can realize the function that the driver leaves the vehicle and the brake system of the vehicle automatically brakes.

Description

Gravity sensing valve and coal mine hydrostatic drive vehicle safety parking control system
Technical Field
The invention belongs to the technical field of parking of coal mine hydrostatic drive vehicles, and particularly relates to a gravity sensing valve and a coal mine hydrostatic drive vehicle safety parking control system.
Background
In recent years, with the increase of the mining thickness of coal seams and the modernized construction of mines, the explosion-proof rubber-tyred vehicle is used as a main auxiliary transport vehicle under the mines and plays an important role in the transportation of underground workers, equipment and materials. However, drivers have good quality and are unsmooth, and the following potential safety hazards are exposed along with the mass use of vehicles in the underground:
1. when a vehicle driver leaves a vehicle, the phenomenon that the driver does not operate a parking valve of the vehicle to a parking position occasionally occurs, and if the vehicle stops on an underground slope, vehicle sliding is bound to occur, so that the hidden danger of injury to the driver and other underground workers exists;
2. when some drivers leave the vehicle, the parking brake is operated to the parking position according to the operation instructions, but the direction handle of the vehicle is not placed to the middle position, the vehicle is in a braking state at the moment, and the closed pump still drives the motor device, so that the vehicle tends to walk. However, the torque of the parking brake of the vehicle is generally large, which causes the closed pump and the motor to be in a vehicle holding state, and causes certain damage to the closed pump and the motor, thereby affecting the service life;
3. under the well, a driver often operates the direction handle to the forward or backward position without operating the parking brake handle after getting on the vehicle, so that the vehicle is still braked, and is oiled and driven to travel; or the driver directly operates the steering, the tire can not roll, and under the action of the steering force, the tire can only slide with the ground, so that the abrasion of the tire is aggravated.
Although the coal mine enterprises have strict regulations and regulations to restrict the operation behaviors of drivers of explosion-proof vehicles and train the drivers regularly, the cultural quality of the drivers and the reasons of underground special operating environments cannot completely prevent the illegal operation caused by the human negligence, and vehicle damage or casualty accidents happen occasionally.
Disclosure of Invention
The invention solves at least one problem in the prior art and provides a gravity sensing valve and a coal mine hydrostatic drive vehicle safety parking control system.
In order to achieve the purpose, the invention adopts the following technical scheme that the gravity sensing valve comprises a valve seat, a valve core, a valve body and a return spring, wherein the top of the valve core is connected with a gravity sensing rod, the gravity sensing rod receives the load action, and the stroke range of the gravity sensing rod under the load action is more than or equal to the stroke of the valve core reversing.
Preferably, the gravity sensing valve is installed below the bottom of a vehicle driver seat, and the load of the seat is transmitted to the gravity sensing rod to overcome the spring force generated by the return spring, so that the gravity sensing valve is controlled to change.
Preferably, the top of the gravity sensing rod is in threaded connection with an adjusting block.
Preferably, the gravity sensing valve is arranged in a seat damping spring, the seat damping spring is installed on the installation base, a limiting cover plate is arranged at the top of the seat damping spring, the valve cover is lapped on the limiting cover plate, and an upper limiting block is fixedly connected to the upper end of the limiting cover plate;
the limiting cover plate is connected with the mounting base through a locking cover sleeved on the outer side of the limiting cover plate and the mounting base, the inner side of the lower portion of the locking cover is lapped on the mounting base, the upper end of the locking cover 22 limits a limiting ring of the limiting cover plate, the limiting cover plate can slide along the inner cavity of the locking cover under the action of the seat, and the rigidity of the seat damping spring is greater than that of the reset spring.
The invention also provides a safety parking control system of the coal mine hydrostatic drive vehicle, which comprises a gravity sensing valve, wherein the gravity sensing valve is connected with the brake control valve in series, and the A port of the gravity sensing valve is connected with the control ends of the brake reversing valve, the left reversing valve and the right reversing valve of the vehicle.
Preferably, the port P of the brake control valve is connected with an air source, and the brake control valve, the brake reversing valve, the left reversing valve and the right reversing valve are all pneumatically controlled and are a pneumatic control valve, a pneumatic control brake reversing valve, a left pneumatic control reversing valve and a right pneumatic control reversing valve.
Preferably, the hydraulic brake system further comprises a hydraulic oil tank, a left closed pump, a left direction control handle, a left pressure gauge, a pneumatic indicator lamp, a brake pressure gauge, a brake energy accumulator, a right pressure gauge, a right direction control handle, a right closed pump, a right driving motor and a left driving motor;
the hydraulic oil tank is connected with a left closed pump and a right closed pump, the left closed pump is connected with a left direction control handle and a left driving motor, the right closed pump is connected with a right direction control handle and a right driving motor, a P port of the left direction control handle is connected with an A port of a left pneumatic control reversing valve and is provided with a left pressure gauge in a pipeline, a P port of the right direction control handle is connected with an A port of a right pneumatic control reversing valve and is provided with a right pressure gauge in a pipeline, an A port of the gravity sensing valve is simultaneously connected with the left pneumatic control reversing valve, a control end of the right pneumatic control reversing valve and the pneumatic control reversing valve and is provided with a pneumatic indicator lamp in a pipeline, the P port of the gravity sensing valve is connected with the A port of the pneumatic control valve, and the P port of the pneumatic control reversing valve is connected with the brake energy accumulator and is provided with the brake pressure gauge in the pipeline.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention realizes the non-electric control automatic braking function, because of the special explosion-proof requirement under the coal mine, no electric part is used in the invention, but the weight of the seat is changed due to the fact that a driver gets up and leaves the seat when leaving the vehicle, the seat damping device has displacement change, the gravity sensing valve is designed, the function that the driver leaves the vehicle and the braking system of the vehicle can automatically brake is realized, and the potential safety hazard that the driver slides the vehicle due to human negligence is eliminated.
2. When the gravity sensing valve is designed, jolting when a vehicle runs is considered, the impact of the seat on the gravity sensing valve is reduced by designing the upper limiting block on the limiting cover plate, the impact of the seat on the valve core is reduced, the gravity sensing valve is fixed on the installation base with the seat damping spring, the valve can move along with the seat, the impact damage to a shell of the valve can not be caused, and the reliability of the valve is improved.
3. The design of the pneumatic indicating lamp is used for reminding a driver of the state of the vehicle, so that the driver can operate the vehicle on the next step, if the vehicle is not braked, the pneumatic indicating lamp can inform the driver of the state, and the driver can make correct operation to stop the vehicle safely.
4. The invention relates to a brake operation and an oil supply circuit of a direction control handle, realizes that the oil supply of the direction control handle is automatically returned to an oil tank when a vehicle is operated for braking, the variable of a closed pump can not be controlled no matter the direction control handle is in a forward or backward position, the closed pump can not drive a motor, and the phenomenon of motor blockage caused by the rotation of an oil supply driving motor of the closed pump due to the braking of a speed reducer is eliminated.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a functional schematic of the control system of the present invention;
FIG. 2 is a schematic view of the installed position of the gravity-sensitive valve of the present invention;
fig. 3 is a schematic view of the gravity-sensitive valve of the present invention.
In the figure: 1-hydraulic oil tank, 2-oil absorption filter core, 3-left closed pump, 4-left direction control handle, 5-left pressure gauge, 6-pneumatic control valve, 7-left pneumatic control reversing valve, 8-pneumatic indicator lamp, 9-gravity sensing valve, 9.1-valve seat, 9.2-reset spring, 9.3-valve core, 9.4-valve body, 9.5-valve cover, 9.6-gravity sensing rod, 9.7-adjusting block, 10-pneumatic control brake reversing valve, 11-brake pressure gauge, 12-brake energy accumulator, 13-right pressure gauge, 14-right direction control handle, 15-right pneumatic control reversing valve, 16-right closed pump, 17-right driving motor, 18-left driving motor, 19-installation base, 20-seat damping spring, 21-limit cover plate, 21.1-limit ring, 22-locking cover and 23-upper limit block.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described in conjunction with the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any creative effort, shall fall within the protection scope of the present invention.
It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for understanding and reading the present disclosure, and are not used for limiting the limit of the present disclosure, which is not a technical meaning, and any structural modifications, ratio changes, or size adjustments may still fall within the scope of the present disclosure without affecting the function and the achievable effect of the present disclosure.
The present invention provides an embodiment:
as shown in fig. 3, the gravity sensing valve 9 is composed of a valve seat 9.1, a return spring 9.2, a valve core 9.3, a valve body 9.4, a valve cover 9.5 and a gravity sensing rod 9.6, and the gravity sensing valve 9 is provided with an air inlet P, an air outlet T and a working air port a. Have the recess that is used for installing reset spring 9.2 in the disk seat 9.1, case 9.3 slides and sets up in the inner chamber of valve body 9.4, it is spacing that valve body 9.4 is passed through to case 9.3's upper end, reset spring 9.2 is connected between disk seat 9.1 and case 9.3, air inlet P, gas vent T, work gas port A sets up on valve body 9.4, can form between case 9.3 and the valve body 9.4 and be used for communicateing air inlet P and work gas port A, the cavity of gas vent T and work gas port A, gravity-sensitive pole 9.6 passes valve gap 9.5 and links firmly in case 9.3 upper end.
When the seat is unloaded, the valve core 9.3 in the gravity sensing valve 9 is in an initial state under the action of the spring force of the return spring 9.2, the port A of the gravity sensing valve 9 is communicated with the port T, and the port P is blocked by the valve core 9.3; when the seat is loaded, the gravity sensing rod 9.5 moves downwards under the action of pressure, meanwhile, the valve core 9.3 is driven to move downwards by overcoming the spring force generated by the return spring 9.2, the reversing of the gravity sensing valve 9 is completed through the position change of the valve core 9.3, at the moment, the port P of the gravity sensing valve 9 is communicated with the port A, and the port T is blocked by the valve core 9.3.
As shown in fig. 2, the gravity sensing valve 9 is installed below the bottom of a vehicle driver seat, the gravity sensing valve 9 is disposed in a seat damping spring 20, the seat damping spring 20 is installed on an installation base 19, a limit cover plate 21 is disposed at the top of the seat damping spring 20, the limit cover plate 21 is flush with the top of a valve body 9.4, a valve cover 9.5 is lapped on the limit cover plate 21, an upper limit block 23 is fixedly connected to the upper end of the limit cover plate 21, an adjusting block 9.7 is in threaded connection with the top of a gravity sensing rod 9.6, the diameter of the bottom end of the adjusting block 9.7 is larger than that of a gravity sensing rod through hole in the valve cover 9.5, when an air inlet P of the gravity sensing valve 9 is completely communicated with an operating air inlet a, the upper end of the adjusting block 9.7 is higher than the upper limit block 23 by about the height of a valve core stroke of the gravity sensing valve, the limit cover plate 21 is connected with the installation base 19 through a locking cover 22 sleeved on the outer sides of the limit cover plate 21 and the installation base 19, the inner side of the lower portion of the locking cover 22 is lapped on the installation base 19, the inner side of the upper portion of the limiting ring 21 of the limiting cover plate 21, the limiting spring cover plate 21 can limit the inner cavity of the seat under the effect of the seat, and limit spring 20, and limit the pre-load of the seat.
The relative length specification of the gravity sensing rod 9.6 of the gravity sensing valve 9 can be adjusted according to the screwing depth of the adjusting block 9.7, so that the stroke of the relative movement between the seat and the valve core 9.3 can be conveniently adjusted during installation, and the gravity sensing valve can be used together with the upper limiting block 23; when the seat moves downwards and the valve core 9.3 of the gravity sensing valve 9 is completely reversed, the upper limiting block 23 is contacted with the seat, the downward force of the seat on the valve body 9.4 is transmitted to the seat damping spring 20 through the upper limiting block 23 and the limiting cover plate 21, so that the gravity sensing valve 9 is not influenced by the seat pressure, namely the gravity sensing valve 9 moves together with the seat along with the bumping of a vehicle, and the valve core 9.3 of the gravity sensing valve 9 is protected.
The rigidity of a return spring 9.2 of the gravity sensing valve 9 meets the requirement that the valve core 9.3 can be quickly reset under the condition that the seat is not loaded, the working air port A is communicated with the exhaust port T, when the seat is loaded, the valve core 9.3 can be reversed, and the air inlet P is communicated with the working air port A. The stiffness of the return spring 9.2 is less than the stiffness of the seat damping spring 20, i.e. the gravity sensing valve 9 remains in the reversing position when the seat is damped. The seat damping spring 20 can also enable the gravity sensing valve 9 to move along with the seat while playing a role in damping, so that the situation that the valve core 9.3 is impacted due to seat vibration and the performance of the valve is damaged is avoided, and the reliability of the gravity sensing valve 9 can be improved.
The invention also provides a safe parking control system of the coal mine hydrostatic drive vehicle, which comprises a hydraulic oil tank 1, an oil absorption filter element 2, a left closed pump 3, a left direction control handle 4, a left pressure gauge 5, a brake control valve 6, a left pneumatic control reversing valve 7, a pneumatic indicator lamp 8, a gravity sensing valve 9, a pneumatic control brake reversing valve 10, a brake pressure gauge 11, a brake energy accumulator 12, a right pressure gauge 13, a right direction control handle 14, a right pneumatic control reversing valve 15, a right closed pump 16, a right drive motor 17 and a left drive motor 18; the hydraulic oil tank 1 is connected with a left closed pump 3 and a right closed pump 16 through an oil absorption filter core 2, the left closed pump 3 is connected with a left direction control handle 4 and a left driving motor 18, the right closed pump 16 is connected with a right direction control handle 14 and a right driving motor 17, a port P of the left direction control handle 4 is connected with a port A of a left pneumatic control reversing valve 7, a left pressure gauge 5 is arranged on a pipeline, a port P of the right direction control handle 14 is connected with a port A of a right pneumatic control reversing valve 15, a right pressure gauge 13 is arranged on the pipeline, the left pneumatic control reversing valve 7 and the right pneumatic control reversing valve 15 are simultaneously connected with a port A of a gravity sensing valve 9 and a pneumatic control dynamic reversing valve 10, a pneumatic indicator lamp 8 is arranged on the pipeline, a port P of the gravity sensing valve 9 is connected with a port A of a control valve 6, a port P of the control valve is connected, a port P of the pneumatic control dynamic control reversing valve 10 is connected with a brake energy accumulator 12, and a brake pressure gauge 11 is arranged on the pipeline.
The coal mine hydrostatic drive vehicle safe parking control system utilizes the existing brake accumulator 12 and brake pressure gauge 11 in the brake system on the vehicle, and connects the high-pressure air source on the vehicle into the system to drive the action of the related pneumatic control valve; the left direction control handle 4 and the right direction control handle 14 are respectively used for controlling variable mechanisms inside a left closed type pump 3 and a right closed type pump 16 of the vehicle, and finally control over forward or backward movement of the vehicle is achieved.
The specific working principle is as follows: after getting on the vehicle, a driver can firstly sit to driveAfter the vehicle is started on a seat of a cab, a liquid charging valve of the vehicle charges the brake accumulator 12, and the brake pressure gauge 11 can directly read the hydraulic oil pressure in the brake accumulator 12. A gravity sensing valve 9 is arranged below a seat of a cab, when a driver sits on the seat, the gravity sensing valve 9 automatically reverses, and at the moment, a port P of the gravity sensing valve 9 is communicated with a port A. When a driver wants to operate the vehicle to walk, the pneumatic brake control valve 6 is pulled out, the valve core of the pneumatic brake control valve 6 is reversed, the port P of the pneumatic brake control valve 6 is communicated with the port A, a high-pressure air source on the vehicle enters the pneumatic indicator lamp 8 through the pneumatic brake control valve 6 and the gravity sensing valve 9 to drive the pneumatic indicator lamp to turn green, the high-pressure air source simultaneously reaches the control end of the pneumatic brake reversing valve 10 to push the valve core of the pneumatic brake reversing valve 10 to reverse, high-pressure oil in the brake energy accumulator 12 reaches the port A through the port P of the pneumatic brake reversing valve 10, and the brake devices of all brakes of the vehicle are released through the port A. Meanwhile, a high-pressure air source also enters a control cavity of the left pneumatic control reversing valve 7 and a control cavity of the right pneumatic control reversing valve 15, respective ports P of the left pneumatic control reversing valve 7 and the control cavity of the right pneumatic control reversing valve 15 are communicated with a port A, walking control oil provided by the left closed pump 3 and the right closed pump 16 respectively reaches the ports P of the left direction control handle 4 and the right direction control handle 14 through the ports P and A of the left pneumatic control reversing valve 7 and the right pneumatic control reversing valve 15, and a left pressure gauge 5 and a right pressure gauge 13 display the pressure of the control oil; when the driver operates the left direction control handle 4 and the right direction control handle 14 to move forward, the control oil enters K through a port P of the direction control handle 1 The port reaches the control port X of the closed pump through a pipeline 1 The vehicle travels forwards; when the hydraulic control device is operated in a retreating mode, oil is controlled to enter the K through a P port of the direction control handle 2 The port reaches the control port X of the closed pump through a pipeline 2 And the vehicle backs up backwards.
When the driver leaves the vehicle, the pneumatic control valve 6 should be pressed according to the operating rules, so that the vehicle can be braked and the vehicle is ensured not to slide. However, it often happens that the driver leaves the vehicle but does not press the pneumatic control valve 6, the vehicle is not braked, and particularly when the vehicle is not turned off, the vehicle has a safety hazard of rolling. A gravity sensing valve 9 is additionally arranged in the safety parking control system of the coal mine hydrostatic drive vehicle, when a driver gets up and leaves a seat, the gravity sensing valve 9 enables a valve core 9.3 to be reversed under the action of a return spring 9.2, an A port of the gravity sensing valve 9 is communicated with a T port, control gases in a pneumatic indicator lamp 8, a pneumatic control brake reversing valve 10, a left pneumatic control reversing valve 7 and a right pneumatic control reversing valve 15 are all exhausted, and the pneumatic indicator lamp 8 is changed into red. The valve core of the pneumatic control brake reversing valve 10 is reversed, high-pressure oil in the brake energy accumulator 12 reaches the port B through the port P of the pneumatic control brake reversing valve 10 for plugging, the high-pressure oil for releasing a brake of a vehicle reaches the port T through the port A of the pneumatic control brake reversing valve 10 and returns to an oil tank, and the brake is in a braking state. Valve cores of the left pneumatic control reversing valve 7 and the right pneumatic control reversing valve 15 are reversed, traveling control oil liquid provided by the left closed pump 3 and the right closed pump 16 is blocked at ports P of the two valves respectively, and high-pressure oil liquid in the left direction control handle 4 and the right direction control handle 14 flows to a T port oil return tank through ports A of the left pneumatic control reversing valve 7 and the right pneumatic control reversing valve 15 which are connected respectively. The variable displacement mechanisms in the left closed pump 3 and the right closed pump 16 make the swash plates of the closed pumps return to the middle position under the action of spring force, and the pumps do not output oil any more. In this case, even if the left and right direction handles 4 and 14 are in the forward or backward movement state, the closed pump does not drive the left and right drive motors 18 and 17 to rotate, and the vehicle is ensured to be in the brake stationary state.
In another embodiment, the port P of the brake control valve is connected with a pressure oil source, and the brake reversing valve, the gravity sensing valve 9, the left reversing valve and the right reversing valve are controlled by oil.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (7)

1. The utility model provides a gravity-sensing valve, includes disk seat (9.1), case (9.3), valve body (9.4) and reset spring (9.2), its characterized in that: the top of the valve core (9.3) is connected with a gravity sensing rod (9.6), the gravity sensing rod (9.6) receives a load action, and the stroke range of the gravity sensing rod (9.6) under the load action is more than or equal to the stroke of the valve core (9.3) for reversing.
2. A gravity sensitive valve according to claim 1, wherein: the gravity sensing valve is arranged below the bottom of a vehicle driver seat, and the load of the seat is transmitted to the gravity sensing rod (9.6) to overcome the spring force generated by the reset spring (9.2) so as to control the gravity sensing valve to change direction.
3. A gravity sensitive valve according to claim 1, wherein: the top of the gravity sensing rod (9.6) is in threaded connection with an adjusting block (9.7).
4. A gravity sensitive valve according to claim 3, wherein: the gravity sensing valve is arranged in a seat damping spring (20), the seat damping spring (20) is installed on an installation base (19), a limiting cover plate (21) is arranged at the top of the seat damping spring (20), a valve cover (9.5) is lapped on the limiting cover plate (21), and an upper limiting block (23) is fixedly connected to the upper end of the limiting cover plate (21);
the limiting cover plate (21) is connected with the mounting base (19) through a locking cover (22) sleeved on the outer sides of the limiting cover plate and the mounting base, the inner side of the lower portion of the locking cover (22) is lapped on the mounting base (19), the upper end of the locking cover (22) is limited to a limiting ring (21.1) of the limiting cover plate (21), the limiting cover plate (21) can slide along the inner cavity of the locking cover (22) under the action of the seat, and the rigidity of the seat damping spring (20) is greater than that of the reset spring (9.2).
5. The utility model provides a colliery hydrostatic drive vehicle safety parking control system which characterized in that: the gravity sensing valve (9) is connected with the brake control valve in series, and an A port of the gravity sensing valve (9) is connected with control ends of a brake reversing valve, a left reversing valve and a right reversing valve of a vehicle.
6. The safety parking control system for the coal mine hydrostatic drive vehicle as claimed in claim 5, wherein: the port P of the brake control valve is connected with an air source, and the brake control valve, the brake reversing valve, the left reversing valve and the right reversing valve are all pneumatically controlled and are a pneumatic control valve (6), a pneumatic control brake reversing valve (10), a left pneumatic control reversing valve (7) and a right pneumatic control reversing valve (15).
7. The safety parking control system for the coal mine hydrostatic drive vehicle as claimed in claim 6, wherein: the hydraulic brake system is characterized by further comprising a hydraulic oil tank (1), a left closed pump (3), a left direction control handle (4), a left pressure gauge (5), a pneumatic indicator lamp (8), a brake pressure gauge (11), a brake energy accumulator (12), a right pressure gauge (13), a right direction control handle (14), a right closed pump (16), a right driving motor (17) and a left driving motor (18);
the hydraulic oil tank (1) is connected with a left closed pump (3) and a right closed pump (16), the left closed pump (3) is connected with a left direction control handle (4) and a left driving motor (18), the right closed pump (16) is connected with a right direction control handle (14) and a right driving motor (17), a port P of the left direction control handle (4) is connected with a port A of a left pneumatic control reversing valve (7) and is provided with a left pressure gauge (5) in a pipeline, a port P of the right direction control handle (14) is connected with a port A of a right pneumatic control reversing valve (15) and is provided with a right pressure gauge (13) in the pipeline, a port A of a gravity sensing valve (9) is simultaneously connected with a port A of the pneumatic control valve (6) and a control end of the left pneumatic control reversing valve (7), a control end of the right pneumatic control reversing valve (15) and the pneumatic control end of the pneumatic control reversing valve (10), and is provided with a pneumatic indicator lamp (8) in the pipeline, a port P of the gravity sensing valve (9) is connected with a port A of the pneumatic control valve (6), and a port P of the pneumatic control reversing valve (10) is connected with a brake accumulator (12) and a brake pressure gauge (11) in the pipeline.
CN202211206530.2A 2022-09-30 2022-09-30 Gravity sensing valve and coal mine hydrostatic drive vehicle safety parking control system Pending CN115402278A (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN200945861Y (en) * 2005-08-09 2007-09-12 杨铭域 Carriage safe full-automatic parking brake system
CN204403262U (en) * 2015-01-09 2015-06-17 旭卡机电（启东）有限公司 A kind of straight-tube shape seat damping device peculiar to vessel
CN206615110U (en) * 2017-03-09 2017-11-07 安徽锦晟汽车工业有限公司 A kind of shock-absorbing type automobile front seat
CN206615111U (en) * 2017-03-09 2017-11-07 安徽锦晟汽车工业有限公司 A kind of shock-absorbing type automobile rear seat
CN108556825A (en) * 2018-06-20 2018-09-21 常熟理工学院 A kind of driver disseats car slipping occurs in the case of automobile automatic tension parking brake device
CN113212397A (en) * 2021-06-22 2021-08-06 中国煤炭科工集团太原研究院有限公司 Vehicle flameout braking device based on clean combustion power control and system thereof
CN215513360U (en) * 2021-08-12 2022-01-14 冯建明 Parking system for driver after leaving seat

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN200945861Y (en) * 2005-08-09 2007-09-12 杨铭域 Carriage safe full-automatic parking brake system
CN204403262U (en) * 2015-01-09 2015-06-17 旭卡机电（启东）有限公司 A kind of straight-tube shape seat damping device peculiar to vessel
CN206615110U (en) * 2017-03-09 2017-11-07 安徽锦晟汽车工业有限公司 A kind of shock-absorbing type automobile front seat
CN206615111U (en) * 2017-03-09 2017-11-07 安徽锦晟汽车工业有限公司 A kind of shock-absorbing type automobile rear seat
CN108556825A (en) * 2018-06-20 2018-09-21 常熟理工学院 A kind of driver disseats car slipping occurs in the case of automobile automatic tension parking brake device
CN113212397A (en) * 2021-06-22 2021-08-06 中国煤炭科工集团太原研究院有限公司 Vehicle flameout braking device based on clean combustion power control and system thereof
CN215513360U (en) * 2021-08-12 2022-01-14 冯建明 Parking system for driver after leaving seat

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