CN114802148B - Hydraulic auxiliary braking control system of explosion-proof trackless rubber-tyred vehicle - Google Patents
Hydraulic auxiliary braking control system of explosion-proof trackless rubber-tyred vehicle Download PDFInfo
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- CN114802148B CN114802148B CN202210287291.1A CN202210287291A CN114802148B CN 114802148 B CN114802148 B CN 114802148B CN 202210287291 A CN202210287291 A CN 202210287291A CN 114802148 B CN114802148 B CN 114802148B
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- air inlet
- air
- gear switch
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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
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/58—Combined or convertible systems
- B60T13/581—Combined or convertible systems both hydraulic and pneumatic
-
- 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
- B60T15/00—Construction arrangement, or operation of valves incorporated in power brake systems and not covered by groups B60T11/00 or B60T13/00
- B60T15/02—Application and release valves
- B60T15/04—Driver's valves
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Braking Systems And Boosters (AREA)
Abstract
The invention discloses a hydraulic auxiliary braking control system of an explosion-proof trackless rubber-tyred vehicle, which is characterized in that a first interface of a manual gear switch is air inlet connected with compressed air of the vehicle, a second interface of the manual gear switch is connected with an air inlet of a first pressure regulating valve, a third interface of the manual gear switch is air outlet, a fourth interface of the manual gear switch is connected with a first air inlet of a second shuttle valve, an air outlet of the first pressure regulating valve is connected with the first air inlet of the first shuttle valve, a control port of a hydraulic control valve is connected with a braking hydraulic circuit, the first interface of the hydraulic control valve is air inlet connected with compressed air of the vehicle, a second interface of the hydraulic control valve is air outlet connected with a second air inlet of a second shuttle valve, an air outlet of the second shuttle valve is connected with the air inlet of the second pressure regulating valve, an air outlet of the second pressure regulating valve is connected with the second air inlet of the first shuttle valve, an air outlet of the first shuttle valve is connected with the air inlet of a quick release valve, and a control port of the quick release valve is connected with a hydraulic auxiliary braking device. Has the advantage of safe use.
Description
Technical Field
The invention relates to the technical field of vehicle braking, in particular to a hydraulic auxiliary braking control system of an explosion-proof trackless rubber-tyred vehicle.
Background
Along with the rapid development of the mining technology in China, the mining area of the near-horizontal coal seam is gradually reduced, the inclined coal seam is gradually increased, and the running gradient and the ramp length of the trackless auxiliary transport vehicle are gradually increased. At present, the explosion-proof vehicles used for underground auxiliary transportation of coal mines are divided into hinged explosion-proof vehicles and integral explosion-proof vehicles according to the form of frames, and the two explosion-proof vehicles are generally suitable for slopes with the gradient smaller than 10 degrees and the length not longer than 500 meters, however, in recent years, the gradient of auxiliary transportation slopes reaches 10-14 degrees, and some auxiliary transportation slopes reach 16 degrees, and the length of the slopes exceeds 2000 meters, so that the performance of a vehicle braking system is severely tested.
At present, a conventional explosion-proof vehicle usually relies on single mechanical friction braking, under the working condition of long distance and large gradient, the temperature rise of a brake is too fast and heat cannot be dissipated in time during braking, so that serious problems such as overheating, sealing failure, oil leakage, braking efficiency reduction and the like of the brake frequently occur, and potential safety hazards are brought to coal mine production and transportation. The hydraulic auxiliary braking system is arranged on a part of common vehicles, but at present, the hydraulic auxiliary braking system is controlled in an electric control mode, namely, a controller is used for controlling an electromagnetic valve, the electromagnetic valve controls output compressed air according to a control signal, the control mode of the hydraulic auxiliary braking system is based on potential safety hazards existing in an explosion-proof environment and is not suitable for being applied to an explosion-proof trackless rubber-tyred vehicle, and based on the potential safety hazards, how to safely use the hydraulic auxiliary braking system on the explosion-proof trackless rubber-tyred vehicle becomes a problem to be solved urgently.
Disclosure of Invention
The invention aims to solve the technical problem of providing the hydraulic auxiliary braking control system of the explosion-proof trackless rubber-tyred vehicle, which has the advantages of simple structure, safe use and meeting the explosion-proof requirement.
The technical scheme adopted for solving the technical problems is as follows:
the hydraulic auxiliary braking control system of the explosion-proof trackless rubber-tyred vehicle comprises a manual gear switch, a first pressure regulating valve, a second pressure regulating valve, a first shuttle valve, a second shuttle valve, a quick release valve and a hydraulic control valve, wherein a first interface of the manual gear switch is air inlet connected with compressed air of the vehicle, a second interface of the manual gear switch is connected with the air inlet of the first pressure regulating valve, a third interface of the manual gear switch is air outlet, a fourth interface of the manual gear switch is connected with a first air inlet of the second shuttle valve, an air outlet of the first pressure regulating valve is connected with a first air inlet of the first shuttle valve, a control port of the hydraulic control valve is connected with a brake hydraulic circuit, a first interface of the hydraulic control valve is air inlet connected with compressed air of the vehicle, a second interface of the hydraulic control valve is connected with a second air inlet of the second shuttle valve, a third interface of the hydraulic control valve is air outlet, an air outlet of the second shuttle valve is connected with a first air inlet of the second shuttle valve, a control valve is connected with a control port of the hydraulic control valve is connected with an air inlet of the quick release valve, and the control valve is connected with an air inlet of the quick release valve.
The hydraulic control valve is a multi-position and multi-way reversing valve. The gear can be specifically selected according to different gear numbers, for example, a two-position three-way reversing valve (corresponding to one air pressure gear and one closing gear) or a three-position four-way reversing valve (corresponding to two air pressure gears and one closing gear) can be adopted.
The manual gear switch is a multi-position and multi-way reversing valve. The gear number can be specifically selected according to different gear numbers, for example, a three-position four-way reversing valve (corresponding to two pneumatic gears and one closing gear) can be adopted, and a four-position five-way reversing valve (corresponding to three pneumatic gears and one closing gear) can be adopted.
The first pressure regulating valve and the second pressure regulating valve are pressure reducing valves with set output air pressure.
The quick release valve is a two-position three-way valve.
Compared with the prior art, the invention has the advantages that: the control system is used for driving the hydraulic auxiliary braking device through the manual gear switch, the first pressure regulating valve, the second pressure regulating valve, the first shuttle valve, the second shuttle valve, the quick release valve and the hydraulic control valve matched with compressed air of a vehicle, is a pure air circuit control system, has no electric explosion-proof problem, is simple in structure and safe to use, and is suitable for being used on an explosion-proof vehicle.
Drawings
Fig. 1 is a schematic diagram of the structure of the present invention in a default state.
Detailed Description
The invention is described in further detail below with reference to the embodiments of the drawings.
As shown in the figure, the hydraulic auxiliary braking control system of the explosion-proof trackless rubber-tyred vehicle comprises a manual gear switch A, a first pressure regulating valve B, a second pressure regulating valve C, a first shuttle valve D, a second shuttle valve E, a quick release valve F and a hydraulic control valve G, wherein a first interface A1 of the manual gear switch A is air inlet connected with compressed air of the vehicle, a second interface A2 of the manual gear switch A is connected with an air inlet B1 of the first pressure regulating valve B, a third interface A3 of the manual gear switch A is an air outlet, a fourth interface A4 of the manual gear switch A is connected with a first air inlet E1 of the second shuttle valve E, an air outlet B2 of the first pressure regulating valve B is connected with a first air inlet D1 of the first shuttle valve D, a control port of the hydraulic control valve G is connected with a brake hydraulic circuit, a first interface G1 of the hydraulic control valve G is air inlet connected with compressed air of the vehicle, a second interface G2 of the hydraulic control valve G is connected with a second air inlet E2 of the second shuttle valve E, a third interface G3 of the hydraulic control valve G is air outlet of the hydraulic control valve E is an air outlet, an air outlet of the second shuttle valve E3 is connected with an air outlet of the second air inlet C2 of the hydraulic control valve C is connected with an air outlet D of the second shuttle valve C2, and an auxiliary valve D is connected with an air outlet of the hydraulic control valve F2.
In this embodiment, the pilot operated valve G is a two-position three-way valve.
In this embodiment, the manual gear switch A is a multi-position, multi-way reversing valve. The gear can be specifically selected according to different gear numbers, for example, a three-position three-way reversing valve (corresponding to two pneumatic gears and one closing gear) can be adopted, and a four-position four-way reversing valve (corresponding to three pneumatic gears and one closing gear) can be adopted.
In this embodiment, the first pressure regulating valve B and the second pressure regulating valve C are both pressure reducing valves for which the output air pressure is set.
In this embodiment, the quick release valve F is a two-position three-way valve.
The specific working principle of the control system is divided into the following cases:
(1) In a default state, a first interface A1 of a manual gear switch A is in a closed state, a second interface A2 and a fourth interface A4 of the manual gear switch A are communicated with a third interface A3 of the manual gear switch A, compressed air in the second interface A2 and the fourth interface A4 of the manual gear switch A is discharged outwards through the third interface A3 of the manual gear switch A, at the moment, the second interface A2 and the fourth interface A4 of the manual gear switch A have no pressure, and compressed air in a second interface G2 of a hydraulic control valve G is discharged through an exhaust port of the hydraulic control valve G, at the moment, the second interface G2 of the hydraulic control valve G has no pressure;
(2) When the control hydraulic pressure exists, the first interface G1 of the hydraulic control valve G is communicated with the second interface G2 of the hydraulic control valve G, compressed air enters the second air inlet E2 of the second shuttle valve E through the second interface G2 of the hydraulic control valve G, the fourth interface A4 of the manual gear switch A has no pressure, namely the first air inlet E1 of the second shuttle valve E has no pressure, at the moment, the air outlet E3 of the second shuttle valve E outputs compressed air passing through the second air inlet E2 of the second shuttle valve E to the air inlet C1 of the second pressure regulating valve C, the air outlet C2 of the second pressure regulating valve C outputs compressed air with set air pressure and enters the second air inlet D2 of the first shuttle valve D, and the air outlet D3 of the first shuttle valve D outputs compressed air passing through the second air inlet D2 of the first shuttle valve D to the air inlet F1 of the quick release valve F at the moment, and the air outlet C2 of the quick release valve F is controlled to realize the control of the hydraulic braking device;
(3) When the first interface A1 of the manual gear switch A is communicated with the fourth interface A4 and the second interface A2 of the manual gear switch A is communicated with the third interface A3, compressed air enters the first air inlet E1 of the second shuttle valve E from the first interface A1 of the manual gear switch A through the fourth interface A4, compressed air in the second interface A2 of the manual gear switch A is discharged from the third interface A3, at the moment, under the condition of controlling hydraulic pressure, the first interface G1 of the hydraulic control valve G is communicated with the second interface G2 of the hydraulic control valve G, the compressed air enters the second air inlet E2 of the second shuttle valve E through the second interface G2 of the hydraulic control valve G, and at the moment, compressed air enters the first air inlet E1 of the second shuttle valve E from the fourth interface A4 of the manual gear switch A, compressed air entering from the two air inlets of the second shuttle valve E is discharged from the first air inlet E to the second air outlet C1 of the second shuttle valve E, namely the compressed air is discharged from the first air inlet C2 of the second shuttle valve D to the second air outlet C2 of the hydraulic control valve F, and the compressed air is discharged from the first air inlet F2 to the second shuttle valve D to the air outlet F2 through the second air outlet C2 of the hydraulic control valve D, and the compressed air is not discharged from the first air inlet F2 is discharged to the second air outlet D2 through the hydraulic valve D;
(4) When the first interface A1 of the manual gear switch A is communicated with the second interface A2, the third interface A3 of the manual gear switch A is communicated with the fourth interface A4, compressed air enters the air inlet B1 of the first pressure regulating valve B from the first interface A1 of the manual gear switch A through the second interface A2, compressed air in the fourth interface A4 of the manual gear switch A is discharged from the third interface A3, at the moment, under the condition of controlling hydraulic pressure, the first interface G1 of the hydraulic control valve G is communicated with the second interface G2 of the hydraulic control valve G, compressed air enters the second air inlet E2 of the second shuttle valve E through the second interface G2 of the hydraulic control valve G, and because the fourth interface A4 of the manual gear switch A has no pressure, that is, the first air inlet E1 of the second shuttle valve E has no pressure, the compressed air passing through the second air inlet E2 of the second shuttle valve E is output to the air inlet C1 of the second pressure regulating valve C, the air outlet C2 of the second pressure regulating valve C is set to be output to the first air inlet D of the second shuttle valve F, the compressed air is output to the air outlet D of the second shuttle valve F is output to the air inlet D of the second shuttle valve F, and the compressed air is output to the air inlet D of the first shuttle valve F, and the compressed air is output to the compressed air inlet D is output to the air inlet D and the compressed air valve E is compressed to the compressed air.
Claims (5)
1. The hydraulic auxiliary braking control system of the explosion-proof trackless rubber-tyred vehicle is characterized by comprising a manual gear switch, a first pressure regulating valve, a second pressure regulating valve, a first shuttle valve, a second shuttle valve, a quick release valve and a hydraulic control valve, wherein a first interface of the manual gear switch is air inlet connected with compressed air of the vehicle, a second interface of the manual gear switch is connected with an air inlet of the first pressure regulating valve, a third interface of the manual gear switch is air outlet, a fourth interface of the manual gear switch is connected with a first air inlet of the second shuttle valve, an air outlet of the first pressure regulating valve is connected with a first air inlet of the first shuttle valve, a control port of the hydraulic control valve is connected with a brake hydraulic circuit, a first interface of the hydraulic control valve is air inlet connected with compressed air of the vehicle, a second interface of the hydraulic control valve is connected with a second air inlet of the second shuttle valve, a third interface of the hydraulic control valve is air outlet, an air outlet of the second shuttle valve is connected with a first air inlet of the second shuttle valve, a control port of the hydraulic control valve is connected with a second air outlet of the hydraulic control valve is connected with an auxiliary brake valve, and a control valve is connected with a control valve;
in the initial state, a first interface of the manual gear switch is in a closed state, a second interface and a fourth interface of the manual gear switch are communicated with a third interface of the manual gear switch, compressed air in the second interface and the fourth interface of the manual gear switch is discharged outwards through the third interface of the manual gear switch, compressed air in the second interface of the hydraulic control valve is discharged through an exhaust port of the hydraulic control valve, and at the moment, the second interface and the fourth interface of the manual gear switch and the second interface of the hydraulic control valve are not pressurized;
when the control hydraulic pressure exists, the first interface of the hydraulic control valve is communicated with the second interface, compressed air enters the second air inlet of the second shuttle valve through the second interface of the hydraulic control valve, at the moment, because the first air inlet of the second shuttle valve and the first air inlet of the first shuttle valve have no pressure, the air outlet of the second shuttle valve outputs the compressed air passing through the second air inlet of the second shuttle valve to the air inlet of the second pressure regulating valve, the air outlet of the second pressure regulating valve outputs the compressed air with set air pressure and enters the second air inlet of the first shuttle valve, the air outlet of the first shuttle valve outputs the compressed air passing through the second air inlet of the first shuttle valve to the air inlet of the quick release valve, and the control of the hydraulic auxiliary braking device is realized by the compressed air output through the control opening of the quick release valve;
when the first interface of the manual gear switch is communicated with the fourth interface and the second interface of the manual gear switch is communicated with the third interface, compressed air enters the first air inlet of the second shuttle valve from the first interface of the manual gear switch through the fourth interface, compressed air in the second interface of the manual gear switch is discharged from the third interface, at the moment, under the condition of controlling hydraulic pressure, the first interface of the hydraulic control valve is communicated with the second interface of the hydraulic control valve, compressed air enters the second air inlet of the second shuttle valve through the second interface of the hydraulic control valve, at the moment, compressed air enters the first air inlet of the second shuttle valve from the fourth interface of the manual gear switch, compressed air with higher air pressure enters the air outlet of the second shuttle valve is output to the air inlet of the second pressure regulating valve through the air outlet of the second shuttle valve, the air outlet of the second pressure regulating valve outputs compressed air with set air pressure and enters the second air inlet of the first shuttle valve, and the second air inlet of the first shuttle valve is rapidly discharged through the air outlet of the hydraulic control valve, and the first shuttle valve is rapidly discharged through the air inlet of the hydraulic control valve is rapidly discharged through the air outlet of the second shuttle valve;
when the first interface of the manual gear switch is communicated with the second interface, the third interface of the manual gear switch is communicated with the fourth interface, compressed air enters the air inlet of the first pressure regulating valve from the first interface of the manual gear switch through the second interface, compressed air in the fourth interface of the manual gear switch is discharged from the third interface, at the moment, under the condition of controlling hydraulic pressure, the first interface of the hydraulic control valve is communicated with the second interface of the hydraulic control valve, the compressed air enters the second air inlet of the second shuttle valve through the second interface of the hydraulic control valve, and because the fourth interface of the manual gear switch has no pressure, the first air inlet of the second shuttle valve has no pressure, at the moment, the air outlet of the second shuttle valve outputs compressed air passing through the second air inlet of the second shuttle valve to the air inlet of the second pressure regulating valve, the air outlet of the second pressure regulating valve outputs compressed air with set air pressure to the second air inlet of the first shuttle valve, the compressed air with set air pressure is output to the first air inlet of the first shuttle valve under the condition, the compressed air is output from the first air inlet of the first shuttle valve to the air inlet of the first shuttle valve through the control valve, and the compressed air is output to the air outlet of the compressed air valve is rapidly discharged to the air inlet of the pneumatic valve through the air inlet of the first valve through the control valve.
2. The hydraulic auxiliary brake control system of the explosion-proof trackless rubber-tyred vehicle according to claim 1, wherein the hydraulic control valve is a multi-position and multi-way reversing valve.
3. The hydraulic auxiliary brake control system of the explosion-proof trackless rubber-tyred vehicle according to claim 1, wherein the manual gear switch is a multi-position and multi-way reversing valve.
4. The hydraulic auxiliary brake control system for an explosion-proof trackless rubber-tyred vehicle according to claim 1, wherein the first pressure regulating valve and the second pressure regulating valve are pressure reducing valves with set output air pressure.
5. The hydraulic auxiliary brake control system of the explosion-proof trackless rubber-tyred vehicle according to claim 1, wherein the quick release valve is a two-position three-way valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210287291.1A CN114802148B (en) | 2022-03-23 | 2022-03-23 | Hydraulic auxiliary braking control system of explosion-proof trackless rubber-tyred vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210287291.1A CN114802148B (en) | 2022-03-23 | 2022-03-23 | Hydraulic auxiliary braking control system of explosion-proof trackless rubber-tyred vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN114802148A CN114802148A (en) | 2022-07-29 |
| CN114802148B true CN114802148B (en) | 2023-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210287291.1A Active CN114802148B (en) | 2022-03-23 | 2022-03-23 | Hydraulic auxiliary braking control system of explosion-proof trackless rubber-tyred vehicle |
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| CN (1) | CN114802148B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1100374A (en) * | 1994-06-10 | 1995-03-22 | 王庭义 | Controlling system and method for braking apparatus of vehical |
| CN103612626A (en) * | 2013-12-02 | 2014-03-05 | 杭叉集团股份有限公司 | Pneumatic control system of large-tonnage forklift |
| CN110745121A (en) * | 2019-10-25 | 2020-02-04 | 中国煤炭科工集团太原研究院有限公司 | Hydraulic-mechanical combined braking control system for underground coal mine explosion-proof vehicle |
| CN210760727U (en) * | 2019-08-29 | 2020-06-16 | 山东临工工程机械有限公司 | Automatic gear-breaking system for brake of loader |
| CN211468413U (en) * | 2019-10-25 | 2020-09-11 | 中国煤炭科工集团太原研究院有限公司 | Hydraulic-mechanical combined braking control system for underground coal mine explosion-proof vehicle |
| CN112026724A (en) * | 2020-09-28 | 2020-12-04 | 徐工集团工程机械股份有限公司科技分公司 | Jointly controllable loader brake system |
| CN112283001A (en) * | 2020-10-28 | 2021-01-29 | 中国煤炭科工集团太原研究院有限公司 | Manual mechanical safety starting device for coal mine underground explosion-proof vehicle |
-
2022
- 2022-03-23 CN CN202210287291.1A patent/CN114802148B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1100374A (en) * | 1994-06-10 | 1995-03-22 | 王庭义 | Controlling system and method for braking apparatus of vehical |
| CN103612626A (en) * | 2013-12-02 | 2014-03-05 | 杭叉集团股份有限公司 | Pneumatic control system of large-tonnage forklift |
| CN210760727U (en) * | 2019-08-29 | 2020-06-16 | 山东临工工程机械有限公司 | Automatic gear-breaking system for brake of loader |
| CN110745121A (en) * | 2019-10-25 | 2020-02-04 | 中国煤炭科工集团太原研究院有限公司 | Hydraulic-mechanical combined braking control system for underground coal mine explosion-proof vehicle |
| CN211468413U (en) * | 2019-10-25 | 2020-09-11 | 中国煤炭科工集团太原研究院有限公司 | Hydraulic-mechanical combined braking control system for underground coal mine explosion-proof vehicle |
| CN112026724A (en) * | 2020-09-28 | 2020-12-04 | 徐工集团工程机械股份有限公司科技分公司 | Jointly controllable loader brake system |
| CN112283001A (en) * | 2020-10-28 | 2021-01-29 | 中国煤炭科工集团太原研究院有限公司 | Manual mechanical safety starting device for coal mine underground explosion-proof vehicle |
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| CN114802148A (en) | 2022-07-29 |
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