CN113479175B - But braking system device of self-propelled fire control trailer - Google Patents

But braking system device of self-propelled fire control trailer Download PDF

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Publication number
CN113479175B
CN113479175B CN202110965900.XA CN202110965900A CN113479175B CN 113479175 B CN113479175 B CN 113479175B CN 202110965900 A CN202110965900 A CN 202110965900A CN 113479175 B CN113479175 B CN 113479175B
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air
brake
pipeline
trailer
valve
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CN113479175A (en
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张志祥
罗军
蒋群力
张伟明
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Guangzhou Langqing Electric Car Co ltd
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Guangzhou Langqing Electric Car Co ltd
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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
    • B60T7/20—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger specially for trailers, e.g. in case of uncoupling of or overrunning by trailer
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C27/00—Fire-fighting land vehicles
    • 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
    • B60T13/24—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 the fluid being gaseous
    • B60T13/26—Compressed-air systems
    • 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
    • B60T15/18—Triple or other relay valves which allow step-wise application or release and which are actuated by brake-pipe pressure variation to connect brake cylinders or equivalent to compressed air or vacuum source or atmosphere
    • B60T15/181—Trailer control valves
    • 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
    • B60T15/18—Triple or other relay valves which allow step-wise application or release and which are actuated by brake-pipe pressure variation to connect brake cylinders or equivalent to compressed air or vacuum source or atmosphere
    • B60T15/182—Trailer brake valves

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Regulating Braking Force (AREA)

Abstract

The invention provides a braking system device of a self-propelled fire trailer, and relates to the technical field of towing trailers. The braking system device of the fire trailer comprises a chassis, wherein two composite braking air chambers are fixedly connected to the middle position of the top of the chassis, a wound air inlet pipeline is arranged at the front end of the right side of the top of the chassis, one end of the air inlet pipeline is fixedly connected with a braking release valve, an emergency relay valve is arranged on an inflation pipeline, and an ABS combination valve is fixedly connected to the rear end of the braking release valve. Air pressure is input into the air storage tank through the air return pipeline and the air inlet pipeline through the work of the air pump, under the condition that the air supply of the main tractor is lack, the trailer can conveniently and quickly unlock and brake through the air pressure, the manual unlocking of mechanical modes such as the air exhaust of the brake pipeline and the screwing-out of a parking unlocking bolt is not needed, the response time of the fire trailer can be effectively shortened, and the safety performance of the trailer in the running and moving process can be greatly improved through the brake release valve.

Description

But braking system device of self-propelled fire control trailer
Technical Field
The invention relates to the technical field of towing trailers, in particular to a braking system device of a self-propelled fire trailer.
Background
With the specialization and specialization of trailer use, a kind of special purpose trailers only executing a certain specified transportation task are widely used, such as fire trailers, mobile police service room trailers, generator trailers and the like, and the special purpose trailers all have a common point when in use, or are rapidly moved from a parking point to a working point, or are moved to another place nearby after being parked for a certain time to continue working.
The existing trailer with special purpose is generally a traction rod trailer, a braking system adopts air braking, braking air pressure and braking control signals are both provided by a traction main vehicle, the trailer and the traction main vehicle are separated and then automatically enter a braking state, when the placement position of the trailer is required to be adjusted or short-distance movement is required, the trailer is troublesome under the conditions of lack of unlocking and traction of the main vehicle, and due to the fact that the self weight of the trailer is large, the trailer lacks of a braking function in the moving process, and effective braking can not be implemented under the emergency condition, so that great potential safety hazard exists.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a braking system device of a self-propelled fire trailer, which solves the problem that the towing trailer lacks a braking function in the moving process.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a but braking system device of self-propelled fire trailer, includes the chassis, both ends all are provided with the rear wheel around leaning on the left side position in the middle of the chassis bottom, both ends all are provided with the front wheel around leaning on the right side position in the middle of the chassis bottom, chassis right side intermediate position fixedly connected with trailer frame, the chassis top fixedly connected with cover body, two composite brake air chambers of chassis top intermediate position fixedly connected with.
Preferably, the front end of the right side of the top of the chassis is provided with a winding air inlet pipeline, one end of the air inlet pipeline is fixedly connected with a brake release valve, the air inlet pipeline is connected with an air inlet of the brake release valve, an air outlet of the brake release valve is fixedly connected with an inflation pipeline, the inflation pipeline is provided with an emergency relay valve, the inflation pipeline is connected with an inflation port of the emergency relay valve, one end of the inflation pipeline penetrates through and is fixedly connected with an air storage tank, and the rear end of the brake release valve is fixedly connected with an ABS combination valve, and the ABS combination valve is communicated with the inflation pipeline.
Preferably, the middle position of the rear end of the gas storage tank penetrates through and is fixedly connected with a parking pipeline, the parking pipeline is a three-way hose, the middle position of the right side of the composite brake air chamber penetrates through and is provided with a parking brake interface, the other two ends of the parking pipeline are fixedly connected with the parking brake interface respectively, a wheel brake is arranged between the middle positions of the composite brake air chamber, and a brake spring is fixedly connected between the middle positions of the left side of the composite brake air chamber.
Preferably, the middle of the top of the chassis close to the right side is fixedly connected with a front brake chamber, an air outlet of the ABS combination valve is respectively and fixedly connected with a front brake pipeline and a parking pipeline, and one end of the front brake pipeline is communicated with the front brake chamber.
Preferably, the rear wheel middle position fixedly connected with ring gear, the left side position fixedly connected with speed sensor and ABS combination valve pass through controller electric connection in the middle of the chassis top.
Preferably, brake release valve rear end bottom gas outlet fixedly connected with return air pipe way, fixedly connected with pressure sensor on the inner wall of gas holder top left side, gas holder rear end fixedly connected with air pump, electric connection between air pump right side fixedly connected with power and the air pump, electric connection between air pump top fixedly connected with controller and the pressure sensor, electric connection between controller and the power, fixed connection between the gas outlet of air pump and the return air pipe way.
Preferably, the control method of the brake system device of the self-propelled fire trailer comprises the following modes:
A) when the trailer runs, if the air inlet pipeline or the inflation pipeline is suddenly broken or leaked, the air pressure at the inflation interface of the emergency relay valve is suddenly reduced, the pressure of the air storage tank interface of the trailer is higher than the inflation pressure, and at the moment, the air storage tank inflates the air outlet and the ABS combined valve pipeline through the main air supply port of the emergency relay valve, so that the trailer automatically brakes, and the braking strength of the trailer depends on the degree of air leakage of the pipeline. If the air charging pipeline is completely broken and the air pressure at the air charging interface is reduced to zero, the full emergency braking can be generated. The air inlet pipeline is separated from the main vehicle after the trailer stops, the air pressure at the air inflation interface is zero, and the trailer automatically generates braking; if the trailer stops for a long time, the air pressure of the air storage tank and the parking pipeline is reduced to a certain degree, when the air pressure of the composite brake air chamber is not enough to overcome the elastic force of a brake spring, the wheel brake automatically enters a parking brake state, and the valve rod of the brake release valve is controlled to be pulled outwards in the process of short-distance self-running or pulled movement through the brake release valve, so that emergency brake is generated;
B) connecting an air inlet pipeline to a corresponding air pressure pipeline of the towing main vehicle, enabling compressed air to enter an air inlet pipeline of the trailer, enabling the air inlet pipeline to be connected with an air inlet of a brake release valve and automatically distributed through the brake release valve to enter an inflation pipeline from an air outlet, enabling the inflation pipeline to be connected with an inflation port of an emergency relay valve, enabling the compressed air to enter the inflation pipeline from a main air supply port of the emergency relay valve through the interior of the emergency relay valve to inflate an air storage tank, and enabling the inflation pipeline to be simultaneously communicated with the air storage tank, the emergency relay valve and an ABS combination valve; the air storage tank is communicated with a parking pipeline, compressed air enters the parking pipeline, the parking pipeline is connected with parking brake interfaces of a left composite brake air chamber and a right composite brake air chamber of the rear axle, and when air pressure reaches a certain degree, the elasticity of a brake spring is overcome, so that a wheel brake is released;
C) when the trailer brakes in the process of traction running when encountering the main trailer, a brake air pressure signal is transmitted to a control port of the emergency relay valve through a front brake pipeline, the emergency relay valve synchronously generates brake with the same strength according to the brake air pressure signal, the brake air pressure enters a control pipeline of the ABS combination valve through an air outlet of the emergency relay valve and is connected to a control port of the ABS combination valve, the ABS combination valve synchronously generates brake with the same strength according to the brake air pressure strength, the brake air pressure respectively enters the front brake pipeline and a parking pipeline through the air outlet of the ABS combination valve, the front brake pipeline inflates two front brake air chambers of a front axle of the trailer to generate brake, the parking pipeline inflates two composite brake air chambers of a rear axle of the trailer to generate brake, a rotating speed sensor transmits the rotating speed of a gear ring on a rear wheel to the ABS combination valve, and the ABS combination valve immediately adjusts the brake air pressure output of the parking pipeline according to a feedback signal of the rotating speed sensor, the rear wheel is prevented from being locked;
D) when the trailer is separated from the main vehicle, the air inlet pipeline and the inflation pipeline lose pressure, the trailer automatically generates brake, if the brake of the trailer needs to be released, only a valve rod of a brake release valve needs to be pressed inwards to be in place, at the moment, the brake release valve communicates the air return pipeline with the inflation pipeline, the air pressure of an air storage tank reenters an inflation interface of an emergency relay valve, the brake of the trailer is naturally released, if the air pressure in the air storage tank of the trailer is too low to unlock the brake, a pressure sensor in the air storage tank transmits a low-pressure alarm signal to a controller, the controller automatically triggers and switches on a power supply, the air storage tank is inflated by compressed air of an air pump through the air return pipeline, the pressure sensor transmits a signal to the controller when the pressure of the air storage tank reaches a rated value, the controller automatically switches off the power supply to stop the air supply, and in the process that the trailer moves in a short distance depending on a self traveling system, the valve rod of the brake release valve can be pulled outwards if the emergency brake is needed, at the moment, the air inlet pipeline is communicated with the inflation pipeline through the brake release valve, the air pressure of the inflation pipeline is exhausted, the air pressure at the inflation interface of the emergency relay valve is zero, and the trailer brakes maximally; similarly, when the trailer needs to be normally parked, the valve rod of the brake release valve can be pulled outwards, and the trailer automatically brakes and parks.
The working principle is as follows: connecting an air inlet pipeline to a corresponding air pressure pipeline of the towing main vehicle, enabling compressed air to enter an air inlet pipeline of the trailer, enabling the air inlet pipeline to be connected with an air inlet of a brake release valve, enabling the compressed air to enter an inflation pipeline from an air outlet through automatic distribution of the brake release valve, enabling the inflation pipeline to be connected with an inflation port of an emergency relay valve, enabling the compressed air to enter the inflation pipeline from a main air supply port of the emergency relay valve through the interior of the emergency relay valve to inflate an air storage tank, and enabling the inflation pipeline to be simultaneously communicated with the air storage tank, the emergency relay valve and an ABS combination valve; the air storage tank is communicated with a parking pipeline, compressed air enters the parking pipeline, the parking pipeline is connected with parking brake interfaces of a left composite brake air chamber and a right composite brake air chamber of the rear axle, when air pressure reaches a certain degree, the elasticity of a brake spring is overcome, a wheel brake is released, and the trailer starts. When the trailer brakes in the process of traction running when encountering the main trailer, a brake air pressure signal is transmitted to the emergency relay valve through a brake pipeline, the emergency relay valve synchronously generates brake with the same strength according to the brake air pressure signal, the brake air pressure enters the ABS combination valve through an air outlet of the emergency relay valve, the ABS combination valve synchronously generates brake with the same strength according to the brake air pressure strength, the brake air pressure respectively enters the front brake pipeline and the parking pipeline through an air outlet of the ABS combination valve, the front brake pipeline inflates two front brake air chambers of a front axle of the trailer to generate brake, the parking pipeline inflates two composite brake air chambers of a rear axle of the trailer to generate brake, the rotating speed sensor transmits the rotating speed of a gear ring on a rear wheel to the ABS combination valve, and the ABS combination valve immediately adjusts the brake air pressure output of the parking pipeline according to a feedback signal of the rotating speed sensor to prevent the rear wheel from being seized. When the trailer runs, if the air inlet pipeline or the inflation pipeline is suddenly broken or leaked, the air pressure at the inflation interface of the emergency relay valve is suddenly reduced, the pressure of the air storage tank interface of the trailer is higher than the inflation pressure, and at the moment, the air storage tank inflates the air outlet and the ABS combination valve pipeline through the main air supply port of the emergency relay valve, so that the trailer automatically brakes, and the braking strength depends on the degree of air leakage of the pipeline. If the air charging pipeline is completely broken and the air pressure at the air charging interface is reduced to zero, the full emergency braking can be generated. The air inlet pipeline is separated from the main vehicle after the trailer stops, the air pressure at the inflation interface is zero, and the trailer automatically brakes; if the trailer is parked for a long time, the air pressure of the air storage tank and the parking pipeline is reduced to a certain degree, and when the air pressure of the composite brake air chamber is not enough to overcome the elastic force of the brake spring, the rear wheel brake automatically enters a parking brake state.
(III) advantageous effects
The invention provides a braking system device of a self-propelled fire trailer. The method has the following beneficial effects:
1. according to the invention, air pressure is input into the air storage tank through the air return pipeline and the air inlet pipeline by the operation of the air pump, so that the trailer can be conveniently and rapidly unlocked and braked through the air pressure under the condition of lacking air supply of the towing main vehicle, and manual unlocking in mechanical modes such as exhausting through the brake pipeline and screwing out a parking unlocking bolt is not needed, and the response time of the fire trailer can be effectively reduced.
2. The trailer can be pulled by a self-walking system or a common tractor which only has a traction device and has no air supply function under the condition that the trailer lacks a matched main tractor, and can even be pushed by manpower to move for a short distance; can make the trailer arrive the operating point fast, very big promotion operating efficiency except can be used in the fire control trailer on, can also be used in generator trailer, special purpose trailers such as mobile police room trailer that have power energy storage device, the suitability is more extensive.
3. The invention controls the valve rod of the brake release valve to be pulled out outwards to generate emergency braking in the process of short-distance self-running or pulled movement through the brake release valve, and can greatly improve the safety performance of the trailer in the running movement process.
Drawings
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a perspective view of the internal structure of the present invention;
FIG. 3 is a bottom view of the internal structure of the present invention;
FIG. 4 is a front view of the internal structure of the present invention;
fig. 5 is a top view of the internal structure of the present invention.
Wherein, 1, a chassis; 2. an air intake line; 3. a brake release valve; 4. an emergency relay valve; 5. an inflation line; 6. a gas storage tank; 7. an ABS combination valve; 8. parking the pipeline; 9. a parking brake interface; 10. a composite brake chamber; 11. a wheel brake; 12. a brake spring; 13. a front brake chamber; 14. a front brake pipe; 15. a rotational speed sensor; 16. a rear wheel; 17. a ring gear; 18. a gas return line; 19. a pressure sensor; 20. a controller; 21. an air pump; 22. a power source; 23. a front wheel; 24. a trailer frame; 25. a cover body.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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 of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example (b):
as shown in fig. 1-5, an embodiment of the invention provides a braking system device of a self-propelled fire trailer, which comprises a chassis 1, wherein rear wheels 16 are arranged at the front end and the rear end of the bottom of the chassis 1 near the left side, front wheels 23 are arranged at the front end and the rear end of the bottom of the chassis 1 near the right side, a trailer frame 24 is fixedly connected at the middle position of the right side of the chassis 1, a cover body 25 is fixedly connected at the top of the chassis 1, and two composite braking air chambers 10 are fixedly connected at the middle position of the top of the chassis 1.
The chassis 1 top right side front end is provided with winding air inlet pipeline 2, air inlet pipeline 2 one end fixedly connected with brake release valve 3 and air inlet pipeline 2 link to each other with brake release valve 3's air inlet, brake release valve 3's gas outlet fixedly connected with gas charging line 5, be provided with urgent relay valve 4 on the gas charging line 5 and gas charging line 5 links to each other with urgent relay valve 4's charging port, gas charging line 5 one end runs through and fixedly connected with gas holder 6, 3 rear end fixedly connected with ABS combination valve 7 of brake release valve and communicate between ABS combination valve 7 and the gas charging line 5.
6 rear end intermediate positions of gas holder run through and fixedly connected with parking pipeline 8 and parking pipeline 8 are the tee bend hose, and composite brake chamber 10 right side intermediate position all runs through and is provided with parking braking interface 9, and fixed connection between the other both ends of parking pipeline 8 respectively and the parking braking interface 9 is provided with wheel brake 11 between the composite brake chamber 10 intermediate position, fixedly connected with brake spring 12 between the composite brake chamber 10 left side intermediate position.
The middle of the top of the chassis 1 close to the right side is fixedly connected with a front brake air chamber 13, and the air outlet of the ABS combination valve 7 is respectively and fixedly connected with a front brake pipeline 14 and a parking pipeline 8.
The middle position of the rear wheel 16 is fixedly connected with a gear ring 17, and the middle position close to the left side of the top of the chassis 1 is fixedly connected with a rotating speed sensor 15, and the rotating speed sensor 15 is electrically connected with the ABS combined valve 7 through a controller 20.
3 rear end bottom gas outlets fixedly connected with return air pipeline 18 of brake release valve, fixedly connected with pressure sensor 19 on the inner wall of 6 tops left sides of gas holder, 6 rear end fixedly connected with air pumps 21 of gas holder, electric connection between air pump 21 right side fixedly connected with power 22 and the air pump 21, electric connection between air pump 21 top fixedly connected with controller 20 and pressure sensor 19, electric connection between controller 20 and power 22, fixed connection between the gas outlet of air pump 21 and return air pipeline 18.
A control method of a brake system device of a self-propelled fire trailer comprises the following modes:
A. when the trailer runs, if the air inlet pipeline 2 or the inflation pipeline 5 is suddenly broken or leaked, the air pressure at the inflation interface of the emergency relay valve 4 is suddenly reduced, the pressure at the interface of the air storage tank 6 of the trailer is higher than the inflation pressure, and at the moment, the air storage tank 6 inflates the air outlet and the pipeline of the ABS combination valve 7 through the main air supply port of the emergency relay valve 4, so that the trailer automatically brakes, and the braking strength of the trailer depends on the degree of air leakage of the pipeline. If the air charging pipeline 5 is completely broken and the air pressure at the air charging interface is reduced to zero, the full emergency braking can be generated. The rear air inlet pipeline 2 is separated from the main vehicle after the trailer stops, the air pressure at the air inflation interface is zero, and the trailer automatically generates braking; if the trailer stops for a long time, the air pressure of the air storage tank 6 and the parking pipeline 8 is reduced to a certain degree, when the air pressure of the composite brake air chamber 10 is not enough to overcome the elasticity of the brake spring 12, the wheel brake 11 automatically enters a parking brake state, and the valve rod of the brake release valve 3 is controlled to be pulled outwards in the short-distance self-running or traction moving process through the brake release valve 3, so that the emergency brake is generated, and the safety performance of the trailer in the running moving process can be greatly improved;
B. connecting an air inlet pipeline 2 to a corresponding air pressure pipeline of a towing main vehicle, enabling compressed air to enter the air inlet pipeline 2 of the trailer, enabling the air inlet pipeline 2 to be connected with an air inlet of a brake release valve 3, enabling the compressed air to enter an inflation pipeline 5 from an air outlet through automatic distribution of the brake release valve 3, enabling the inflation pipeline 5 to be connected with an inflation port of an emergency relay valve 4, enabling the compressed air to enter the inflation pipeline 5 from a main air supply port of the emergency relay valve 4 through the interior of the emergency relay valve 4 to inflate an air storage tank 6, and enabling the inflation pipeline 5 to be simultaneously communicated with the air storage tank 6, the emergency relay valve 4 and an ABS combination valve 7; the air storage tank 6 is communicated with a parking pipeline 8, compressed air enters the parking pipeline 8, the parking pipeline 8 is connected with parking brake interfaces 9 of a left composite brake air chamber 10 and a right composite brake air chamber 10 of a rear axle, when air pressure reaches a certain degree, the elasticity of a brake spring 12 is overcome, a wheel brake 11 is released for braking, a trailer starts, and the trailer can be pulled by a self-walking system or a common tractor which only has a traction device and has no air supply function under the condition of lacking of a matched traction main tractor, and can even be pushed by manpower to move for a short distance; the trailer can quickly reach a working point, and the working efficiency is greatly improved;
C. when the trailer is braked by a main vehicle in the process of traction running, a brake air pressure signal is transmitted to a control port of an emergency relay valve 4 through a front brake pipeline 14, the emergency relay valve 4 synchronously generates brake with the same strength according to the brake air pressure signal, the brake air pressure enters a control pipeline of an ABS combination valve 7 through an air outlet of the emergency relay valve 4 and is connected to the control port of the ABS combination valve 7, the ABS combination valve 7 synchronously generates brake with the same strength according to the brake air pressure strength, the brake air pressure respectively enters the front brake pipeline 14 and a parking pipeline 8 through an air outlet of the ABS combination valve 7, the front brake pipeline 14 inflates two front brake air chambers 13 of a front axle of the trailer to generate brake, the parking pipeline 8 inflates two composite brake air chambers 10 of a rear axle of the trailer to generate brake, a rotating speed sensor 15 transmits the rotating speed of a gear ring 17 on a rear wheel 16 to the ABS combination valve 7, the ABS combination valve 7 immediately adjusts the brake air pressure output of the parking pipeline 8 according to a feedback signal of the rotating speed sensor 15, preventing the rear wheel 16 from locking;
D. when the trailer is separated from the main vehicle, the air inlet pipeline 2 and the inflation pipeline 5 lose pressure, the trailer automatically generates brake, if the trailer brake needs to be relieved, only a valve rod of a brake release valve 3 needs to be pressed inwards to be in place, at the moment, the brake release valve 3 communicates an air return pipeline 18 with the inflation pipeline 5, the air pressure of an air storage tank 6 enters an inflation interface of an emergency relay valve 4 again, the trailer brake is relieved naturally, if the air pressure in the air storage tank 6 of the trailer is too low to relieve the brake, a pressure sensor 19 in the air storage tank 6 transmits a low-pressure alarm signal to a controller 20, the controller 20 automatically triggers to switch on a power supply 22, compressed air of an air pump 21 inflates the air storage tank 6 through the air return pipeline 18, when the pressure of the air storage tank 6 reaches a rated value, the pressure sensor 19 transmits a signal to the controller 20, the controller 20 automatically switches off the power supply 22 to stop air supply, and the trailer automatically cuts off the power supply 22 to perform short-distance running movement by depending on a self-running system of the trailer, if emergency braking is needed, a valve rod of the brake release valve 3 can be pulled outwards, the brake release valve 3 communicates the air inlet pipeline 2 with the air charging pipeline 5 at the moment, the air pressure of the air charging pipeline 5 is exhausted, the air pressure at the air charging interface of the emergency relay valve 4 is zero, and the trailer generates maximum braking; similarly, when the trailer needs to be normally parked, a valve rod of the brake release valve 3 can be pulled outwards, the trailer automatically brakes and parks, under the condition that the air supply of the towing main vehicle is lacked, the trailer can conveniently and quickly unlock the brake through air pressure without manual unlocking through mechanical modes such as exhaust of a brake pipeline and screwing out of a parking unlocking bolt, the response time of the fire trailer can be effectively reduced, the trailer can conveniently unlock a trailer brake system manually under the self-walking working condition besides the functions of service brake, emergency brake and parking brake when the trailer meets the towed working condition, and the trailer is ensured to have the emergency brake function in the whole moving and driving process; meanwhile, the normal pressure of the air storage tank 6 is ensured through the air pump 21, parking braking unlocking is greatly facilitated, and the problem of potential safety hazard of no braking force in the process of being moved or driving by oneself is solved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. A braking system device of a self-propelled fire trailer, comprising a chassis (1), characterized in that: rear wheels (16) are arranged at the front end and the rear end of the middle of the bottom of the chassis (1) close to the left side, front wheels (23) are arranged at the front end and the rear end of the middle of the bottom of the chassis (1) close to the right side, a trailer frame (24) is fixedly connected to the middle of the right side of the chassis (1), a cover body (25) is fixedly connected to the top of the chassis (1), and two composite brake air chambers (10) are fixedly connected to the middle of the top of the chassis (1);
chassis (1) top right side front end is provided with winding air inlet pipeline (2), and air inlet pipeline (2) and the separation of owner's car after the trailer berths, and it is zero to aerify kneck atmospheric pressure, and the trailer is automatic to produce the braking, air inlet pipeline (2) one end fixedly connected with brake release valve (3) and air inlet pipeline (2) link to each other with the air inlet of brake release valve (3), the gas outlet fixedly connected with gas tube (5) of brake release valve (3), if gas tube (5) break completely, aerify kneck atmospheric pressure and descend to zero, then can produce full emergency braking, it links to each other with the charging port of emergency relay valve (4) to be provided with emergency relay valve (4) and gas tube (5) on gas tube (5), gas tube (5) one end runs through and fixedly connected with gas holder (6), it communicates between ABS combination valve (7) and the gas tube (5) to brake release valve (3) rear end fixedly connected with ABS combination valve (7) When the trailer runs, if the air inlet pipeline (2) or the air charging pipeline (5) is suddenly broken and leaked, the air pressure at the air charging interface of the emergency relay valve (4) is suddenly reduced, the interface pressure of the air storage tank (6) of the trailer is higher than the air charging pressure, and at the moment, the air storage tank (6) charges air to the air outlet and the pipeline of the ABS combination valve (7) through the main air supply port of the emergency relay valve (4), so that the trailer automatically generates braking, and the braking strength of the trailer depends on the air leakage degree of the pipeline;
the parking brake device is characterized in that the middle position of the rear end of the air storage tank (6) penetrates through and is fixedly connected with a parking pipeline (8), the parking pipeline (8) is a three-way hose, the middle position of the right side of the composite brake air chamber (10) penetrates through and is provided with a parking brake interface (9), the other two ends of the parking pipeline (8) are respectively and fixedly connected with the parking brake interface (9), a wheel brake (11) is arranged between the middle positions of the composite brake air chamber (10), a brake spring (12) is fixedly connected between the middle positions of the left side of the composite brake air chamber (10), the air storage tank (6) is communicated with the parking pipeline (8), compressed air enters the parking pipeline (8), the parking brake interface (9) of the left composite brake air chamber (10) and the right composite brake air chamber (10) of a rear axle is connected with the parking pipeline (8), and when air pressure reaches a certain degree, the elasticity of the brake spring (12) is overcome, the wheel brake (11) is released from braking.
2. The brake system arrangement of a self-propelled fire trailer of claim 1, wherein: the middle of the top of the chassis (1) close to the right side is fixedly connected with a front brake air chamber (13), an air outlet of the ABS combination valve (7) is respectively fixedly connected with a front brake pipeline (14) and a parking pipeline (8), and one end of the front brake pipeline (14) is communicated with the front brake air chamber (13).
3. The braking system arrangement of a self-propelled fire trailer of claim 1, wherein: rear wheel (16) intermediate position fixedly connected with ring gear (17), be close to left side position fixedly connected with speed sensor (15) and pass through controller (20) electric connection between ABS combination valve (7) in the middle of chassis (1) top, when the trailer meets the main car braking in the process of drawing the travel, the brake air pressure signal passes through preceding brake pipe way (14) and transmits the control port to emergency relay valve (4), emergency relay valve (4) will produce the braking of equivalent intensity according to brake air pressure signal is synchronous, brake air pressure gets into the control pipe way of ABS combination valve (7) and inserts the control port of ABS combination valve (7) through emergency relay valve (4) gas outlet, ABS combination valve (7) will produce the braking of equivalent intensity according to brake air pressure intensity is synchronous.
4. The brake system arrangement of a self-propelled fire trailer of claim 2, wherein: the air outlet at the bottom of the rear end of the brake release valve (3) is fixedly connected with an air return pipeline (18), the inner wall of the left side of the top of the air storage tank (6) is fixedly connected with a pressure sensor (19), the rear end of the air storage tank (6) is fixedly connected with an air pump (21), the right side of the air pump (21) is fixedly connected with a power supply (22), the power supply (22) is electrically connected with the air pump (21), the top of the air pump (21) is fixedly connected with a controller (20), the controller (20) is electrically connected with the pressure sensor (19), the controller (20) is electrically connected with the power supply (22), the air outlet of the air pump (21) is fixedly connected with the air return pipeline (18), if emergency braking is needed, a valve rod of the brake release valve (3) can be pulled out, and the brake release valve (3) communicates the air inlet pipeline (2) with the air charging pipeline (5), the air pressure of the inflation pipeline (5) is exhausted, the air pressure at the inflation interface of the emergency relay valve (4) is zero, and the trailer brakes maximally; similarly, when the trailer needs to be normally parked, the valve rod of the brake release valve (3) can be pulled outwards, and the trailer automatically brakes and parks.
5. The control method of the brake system device of the self-propelled fire trailer according to claim 1, characterized in that: the method comprises the following steps:
A) if the trailer stops for a long time, the air pressure of the air storage tank (6) and the parking pipeline (8) is reduced to a certain degree, when the air pressure of the composite brake air chamber (10) is not enough to overcome the elastic force of the brake spring (12), the wheel brake (11) automatically enters a parking brake state, and the valve rod of the brake release valve (3) is controlled to be pulled outwards to generate emergency braking in the process of self running or traction movement in a short distance through the brake release valve (3);
B) connecting an air inlet pipeline (2) to a corresponding air pressure pipeline of a tractor, allowing compressed air to enter the air inlet pipeline (2) of the trailer, connecting the air inlet pipeline (2) with an air inlet of a brake release valve (3), allowing the compressed air to enter an inflation pipeline (5) from an air outlet through automatic distribution of the brake release valve (3), allowing the inflation pipeline (5) to be connected with an inflation port of an emergency relay valve (4), allowing the compressed air to enter the inflation pipeline (5) from a main air supply port of the emergency relay valve (4) through the interior of the emergency relay valve (4) to inflate an air storage tank (6), and allowing the inflation pipeline (5) to be simultaneously communicated with the air storage tank (6), the emergency relay valve (4) and an ABS combination valve (7);
C) the braking air pressure respectively enters a front braking pipeline (14) and a parking pipeline (8) through an air outlet of an ABS combined valve (7), the front braking pipeline (14) inflates two front braking air chambers (13) of a front axle of the trailer to generate braking, the parking pipeline (8) inflates two composite braking air chambers (10) of a rear axle of the trailer to generate braking, a rotating speed sensor (15) transmits the rotating speed of a gear ring (17) on a rear wheel (16) to the ABS combined valve (7), and the ABS combined valve (7) immediately adjusts the braking air pressure output of the parking pipeline (8) according to a feedback signal of the rotating speed sensor (15) to prevent the rear wheel (16) from locking;
D) when the trailer is separated from the main vehicle, the air inlet pipeline (2) and the inflation pipeline (5) lose pressure, the trailer automatically brakes, if the trailer brake needs to be relieved, only a valve rod of a brake release valve (3) needs to be pressed inwards to be in place, at the moment, the brake release valve (3) communicates the air return pipeline (18) with the inflation pipeline (5), the air pressure of the air storage tank (6) reenters an inflation interface of the emergency relay valve (4), the trailer brake is naturally relieved, if the air pressure in the air storage tank (6) of the trailer is too low to unlock the brake, a pressure sensor (19) in the air storage tank (6) transmits a low-pressure alarm signal to a controller (20), the controller (20) automatically triggers and is connected with a power supply (22), the air pump (21) compresses air to inflate the air storage tank (6) through the air return pipeline (18), and when the pressure of the air storage tank (6) reaches a rated value, the pressure sensor (19) transmits the signal to the controller (20), the controller (20) automatically cuts off the power supply (22) to stop supplying air, and the trailer depends on the self walking system to do short-distance running movement.
CN202110965900.XA 2021-08-23 2021-08-23 But braking system device of self-propelled fire control trailer Active CN113479175B (en)

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