CN107972650B - Hydraulic-pneumatic composite braking system with door protection for explosion-proof rubber-tyred vehicle - Google Patents
Hydraulic-pneumatic composite braking system with door protection for explosion-proof rubber-tyred vehicle Download PDFInfo
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- CN107972650B CN107972650B CN201710661125.2A CN201710661125A CN107972650B CN 107972650 B CN107972650 B CN 107972650B CN 201710661125 A CN201710661125 A CN 201710661125A CN 107972650 B CN107972650 B CN 107972650B
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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
- B60T13/12—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 liquid
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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
- B60T13/24—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
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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
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/70—Electrical control in fluid-pressure brake systems by fluid-controlled switches
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Regulating Braking Force (AREA)
- Braking Systems And Boosters (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
Abstract
The invention belongs to a braking system of a trackless rubber-tyred vehicle with an explosion-proof diesel engine in a coal mine, and particularly relates to a hydraulic-pneumatic composite braking system with door protection for an explosion-proof rubber-tyred vehicle. The anti-explosion rubber-tyred vehicle solves the problems that the conventional anti-explosion rubber-tyred vehicle has the defects that a transmission shaft is broken when the speed of the whole vehicle is high and emergency braking is used, the whole vehicle has no braking, and the vehicle slides due to the fact that the parking braking is not carried out or an engine is not shut off by negligence; the invention has the advantages that the brake system which can effectively and emergently brake by pulling up the emergency brake valve under the emergency situations of the explosion-proof rubber-tyred vehicle galloping or brake failure and the like is provided, so that the safety of personnel is ensured; provided is a brake system which can automatically shut down an engine and automatically stop an explosion-proof rubber-tyred vehicle when a cab door of the explosion-proof rubber-tyred vehicle is unintentionally opened.
Description
Technical Field
The invention belongs to a braking system of a trackless rubber-tyred vehicle with an explosion-proof diesel engine in a coal mine, and particularly relates to a hydraulic-pneumatic composite braking system with door protection for an explosion-proof rubber-tyred vehicle.
Background
The trackless rubber-tyred vehicle with the explosion-proof diesel engine is widely applied to transportation of underground personnel, materials and small equipment of a coal mine, has already formed a certain scale, and plays an important role in modern high-yield and high-efficiency mine construction. The underground road is narrow, the slope is large, even reaches 12-16 degrees, the slope is 5000 meters long, and the performance of the brake system is very important when the brake system is used as an important component of an explosion-proof diesel engine trackless rubber-tyred vehicle.
The conventional service brake system of the explosion-proof rubber-tyred vehicle is an independent brake system, service brakes are respectively arranged on the left and right wheel edges of a front axle and a rear axle of the explosion-proof rubber-tyred vehicle, a hydraulic brake spring release mode is adopted, and the service brake valves are used for controlling the service brake valves in a cab; the parking brake and the emergency brake share one set of brake system, are arranged between the front transmission shaft and the rear transmission shaft of the anti-explosion rubber wheel, adopt a spring brake hydraulic pressure release form, and are operated by a parking brake valve in a cab. The brake used for emergency braking of the explosion-proof rubber-tyred vehicle is arranged between the front transmission shaft and the rear transmission shaft, and when the emergency braking is used when the speed of the whole vehicle runs fast, the transmission shaft is broken, so that the whole vehicle is not braked, and accidents are caused.
After the explosion-proof rubber-tyred vehicle is stopped, a driver firstly pulls up the parking brake valve to enable the vehicle to be in a parking state, and then closes the engine to stop the vehicle. Because a driver opens the cab door to get off the vehicle without pulling up the parking brake valve or closing the engine due to negligence, vehicle sliding is easy to happen, personnel and property loss is caused, and potential safety hazards exist.
Disclosure of Invention
The invention provides a hydraulic-pneumatic composite braking system for protecting an explosion-proof rubber-tyred vehicle with a door, which aims to solve the problems that a transmission shaft is likely to be broken when the existing explosion-proof rubber-tyred vehicle runs at a higher speed and uses emergency braking, so that the whole vehicle is not braked and the vehicle slides due to the fact that parking braking is not carried out or an engine is not turned off due to negligence.
The invention is completed by adopting the following technical scheme:
the hydraulic-pneumatic composite braking system for protecting the explosion-proof rubber-tyred vehicle with a door comprises a hydraulic braking part and a pneumatic braking part;
the hydraulic braking part comprises four groups of multifunctional brakes, a service braking valve, a parking/emergency braking valve and a pneumatic liquid exchange valve, wherein the four groups of multifunctional brakes are respectively arranged at the left side and the right side of the front axle and the rear axle, each multifunctional brake is controlled by the service braking valve and the pneumatic liquid exchange valve, and the parking/emergency braking valve controls the pneumatic liquid exchange valve;
the pneumatic brake part comprises a pneumatic control emergency stop valve, the pneumatic control emergency stop valve comprises a button, the button is controlled by a cab door of the explosion-proof rubber-tyred vehicle in a closed state, and the pneumatic control liquid exchange valve is also controlled by the air hole emergency stop valve.
The pneumatic brake part also comprises an air storage tank, a pneumatic control switch valve, an explosion-proof electromagnetic valve, a pneumatic control starting valve, a starting motor, an air cut-off control cylinder and an oil cut-off control cylinder;
the pneumatic emergency stop valve is a two-position three-way reversing valve and is provided with three interfaces, wherein the three interfaces comprise an interface P7, an interface R2 and an interface A8, the interface R2 is respectively connected with an interface P12 of an oil-cut control cylinder, an interface P11 of an air-cut control cylinder and an interface P6 of the pneumatic liquid-changing valve, a muffler is installed at an interface A8, the air hole emergency stop valve is provided with a push rod type control button, and the inner side surface of the cab door acts on the push rod type control button in a closed state;
the explosion-proof electromagnetic valve is a normally closed two-position three-way reversing valve and is provided with an electric connection port L, a connector R3 and a connector P8, the electric connection port L is connected with an external power box, the connector R3 is connected with a connector P7 of a pneumatic control emergency stop valve and a connector P9 of a pneumatic control starting valve, and the connector P8 is connected with a connector R5 of a pneumatic control switch valve;
the pneumatic control starting valve is a two-position three-way reversing valve and is provided with three interfaces, wherein the three interfaces comprise an interface P9, an interface R4 and an interface A10, the interface P9 is connected with an interface R3 of the explosion-proof electromagnetic valve and an interface P7 of the pneumatic control emergency stop valve, the interface R4 is connected with one interface of the starting motor, and the muffler is installed on the interface A10.
The hydraulic braking part also comprises a hydraulic pump, a liquid charging valve, an energy accumulator for front braking, an energy accumulator for rear braking, an energy accumulator for parking/emergency and a hand pump;
the parking/emergency brake valve is an adjustable pressure reversing valve and is provided with four interfaces, wherein the four interfaces comprise an interface P5, an interface T3, an interface A5 and an interface A6, the interface P5 is connected with an interface R1 of a hand pump and an oil outlet of a one-way valve through a hydraulic rubber tube, an interface T3 is connected with a hydraulic oil tank, an interface A5 is connected with an interface A7 of a pneumatic liquid exchange valve, and an interface A6 is connected with a parking/emergency energy accumulator and a parking/emergency pressure gauge;
the service brake valve is a double-loop series adjustable brake valve, five interfaces are arranged on the valve group and comprise an interface P1, an interface P2, an interface A1, an interface A2 and an interface T1, the interface P1 is connected with a front brake energy accumulator and a front brake pressure gauge, the interface P2 is connected with a rear brake energy accumulator and a rear brake pressure gauge, the interface A1 is respectively connected with an interface X1 of a right front multifunctional brake and an interface X2 of a left front multifunctional brake, the interface A2 is respectively connected with an interface X3 of the right rear multifunctional brake and an interface X4 of the left rear multifunctional brake, and the interface T1 is connected with a hydraulic oil tank;
the pneumatic control liquid exchange valve is provided with five interfaces comprising an interface A7, an interface T4, an interface C, an interface D and an interface P6, wherein the interface A7 is connected with an interface A5 of the parking/emergency brake valve, the interface T4 is connected with a hydraulic oil tank, the interface C is respectively connected with an interface Z1 of the right front multifunctional brake and an interface Z2 of the left front multifunctional brake, the interface D is respectively connected with an interface Z3 of the right rear multifunctional brake and an interface Z4 of the left rear multifunctional brake 15, and the interface P6 is connected with the pneumatic control emergency stop valve, the fuel cut-off control cylinder and the gas cut-off control cylinder;
the two-way shuttle valve is integrated in the liquid filling valve, six interfaces are arranged, the two-way shuttle valve comprises an interface P3, an interface A3, an interface A4, an interface SW, an interface T2 and an interface O, and an interface P3 is a pressure port and is connected with an output port of the hydraulic pump; the interface A3 is connected with the front brake accumulator, the interface A4 is connected with the rear brake accumulator, the interface SW is connected with the interface R1 of the hand pump and the interface P5 of the parking/emergency brake valve, and the interface T2 and the interface O are connected with the hydraulic oil tank.
The multifunctional brake comprises a static shell, an intermediate shell, a movable shell, a bearing I, a bearing II, a static sheet, a movable sheet, a small piston and a large piston, wherein the static shell is connected with an axle housing fixing disc through a static shell bolt, the intermediate shell is connected with the static shell and an end cover through bolts, the movable shell is connected with a half shaft through a half shaft bolt, the bearing I and the bearing II are installed on a shaft tube, a tire rim is installed on the movable shell through a tire bolt, the static sheet is installed on the intermediate shell, the movable sheet is installed on the movable shell, the small piston and the large piston are installed on the intermediate shell, and the movable sheet and the movable shell rotate together with the tire rim.
Compared with the prior art, the invention has the advantages that the brake system which can effectively perform emergency braking by pulling up the emergency brake valve under emergency conditions such as galloping or brake failure of the explosion-proof rubber-tyred vehicle is provided, so that the safety of personnel is ensured; provided is a brake system which can automatically shut down an engine and automatically stop an explosion-proof rubber-tyred vehicle when a cab door of the explosion-proof rubber-tyred vehicle is unintentionally opened.
Drawings
FIG. 1 is a schematic diagram of the multi-functional wheel-side brake of the present invention;
FIG. 2 is a hydraulic braking schematic of the present invention;
FIG. 3 is a pneumatic control schematic of the present invention;
FIG. 4 is a schematic front view of the present invention;
FIG. 5 is a schematic top view of the present invention;
in the figure, 1-a hydraulic pump, 2-a liquid charging valve, 3-a rear brake pressure gauge, 4-a front brake pressure gauge, 5-a front brake energy accumulator, 6-a rear brake energy accumulator, 7-a service brake valve, 8-a parking/emergency brake pressure gauge, 9-a parking/emergency energy accumulator, 10-a parking/emergency brake valve, 11-a pneumatic liquid exchange valve, 12-a right front multifunctional brake, 13-a left front multifunctional brake, 14-a right rear multifunctional brake, 15-a left rear multifunctional brake, 16-a hand pump, 17-a hydraulic oil tank, 18-an air storage tank, 19-a pneumatic switch valve, 20-a flame-proof electromagnetic valve, 21-a pneumatic emergency stop valve, 22-an oil cut-off control cylinder and 23-an air cut-off control cylinder, 24-pneumatic control starting valve, 25-starting motor, 26-cab door, 27-tire rim, 28-tire bolt, 29-static shell bolt, 30-axle shell fixed disk, 31-static shell, 32-middle shell, 33-end cover, 34-movable shell, 35-bearing I, 36-bearing II, 37-axle tube, 38-axle shaft, 39-axle shaft bolt, 40-static piece, 41-movable piece, 42-small piston and 43-large piston.
Detailed Description
The invention is further explained with reference to the drawings.
As shown in FIG. 1, a stationary shell 31 of the multifunctional brake is connected with an axle housing fixed disk 30 through a stationary shell bolt 29, an intermediate shell 32 is connected with the stationary shell 31 and an end cover 33 through bolts, a movable shell 34 is connected with an axle shaft 38 through an axle shaft bolt 39, a bearing I35 and a bearing II 36 are installed on an axle tube 37, and a tire rim 27 is installed on the movable shell 34 through a tire bolt 28. The stationary plate 40 is mounted on the intermediate housing 32 and the movable plate 41 is mounted on the movable housing 34. A small piston 42 and a large piston 43 are mounted on the intermediate housing 32. The rotor 41 and the rotor shell 34 rotate together with the tire rim 27.
As shown in fig. 1, the right front multifunctional brake 12, the left front multifunctional brake 13, the right rear multifunctional brake 14, and the left rear multifunctional brake 15 are fail-safe wet multi-disc brakes. The right front multifunctional brake 12 and the left front multifunctional brake 13 are installed on the right side and the left side of the front axle fixed disk, and the right rear multifunctional brake 14 and the left rear multifunctional brake 15 are installed on the right side and the left side of the rear axle fixed disk.
As shown in fig. 2, it is a hydraulic brake schematic diagram. The brake system comprises four groups of multifunctional brakes, a service brake valve 7, a parking/emergency brake valve 10, a pneumatic liquid exchange valve 11, a hydraulic pump 1, a liquid charging valve 2, an energy accumulator 5 for front braking, an energy accumulator 6 for rear braking, an energy accumulator 9 for parking/emergency and a hand pump 16. The parking/emergency brake valve 10 is an adjustable pressure reversing valve and is provided with four interfaces, wherein the four interfaces comprise an interface P5, an interface T3, an interface A5 and an interface A6, the interface P5 is connected with an interface R1 of a hand pump 16 and an oil outlet of a one-way valve through a hydraulic rubber tube, an interface T3 is connected with a hydraulic oil tank 17, an interface A5 is connected with an interface A7 of a pneumatic liquid exchange valve 11, and an interface A6 is connected with a parking/emergency energy accumulator 9 and a parking/emergency pressure gauge 8.
When the parking/emergency brake valve 10 is pulled up, the port P5 is communicated with the port A5, and the port A5 is not communicated with the port T3. When the handle is lowered, the port P5 is not communicated with the port A5, and the port A5 is communicated with the port T3.
The service brake valve 7 is a double-loop series adjustable brake valve, five interfaces are arranged on the valve group, and the service brake valve comprises an interface P1, an interface P2, an interface A1, an interface A2 and an interface T1, wherein the interface P1 is connected with the front brake accumulator 5 and the front brake pressure gauge 4, an interface P2 is connected with the rear brake accumulator 6 and the rear brake pressure gauge 3, the interface A1 is respectively connected with an interface X1 of the front right multifunctional brake 12 and an interface X2 of the front left multifunctional brake 13, the interface A2 is respectively connected with an interface X3 of the rear right multifunctional brake 14 and an interface X4 of the rear left multifunctional brake 15, and the interface T1 is connected with the hydraulic oil tank 17.
When the brake pedal is pressed, the port P1 of the service brake valve 7 is communicated with the port A1, the port P2 is communicated with the port A2, the port T1 is not communicated with the port A1, and the port T1 is not communicated with the port A2. When the brake pedal is released, the port P1 is not communicated with the port A1, the port P2 is not communicated with the port A2, the port T1 is communicated with the port A1, and the port T1 is communicated with the port A2.
The pneumatic liquid-changing valve 11 is provided with five interfaces, including an interface A7, an interface T4, an interface C, an interface D and an interface P6, wherein the interface A7 is connected with an interface A5 of the parking/emergency brake valve 10, an interface T4 is connected with the hydraulic oil tank 17, the interface C is respectively connected with an interface Z1 of the right front multifunctional brake 12 and an interface Z2 of the left front multifunctional brake 13, the interface D is respectively connected with an interface Z3 of the right rear multifunctional brake 14 and an interface Z4 of the left rear multifunctional brake 15, and the interface P6 is connected with the pneumatic emergency stop valve 21, the oil-cut control cylinder 22 and the air-cut control cylinder 23.
When the port P6 of the pneumatic liquid-changing valve 11 is compressed gas, the port A7 is communicated with the port C and the port D, and the port T4 is not communicated with the port C and the port D. When the interface P6 has no compressed gas, the interface A7 is not communicated with the interface C and the interface D, and the interface T4 is communicated with the interface C and the interface D.
The two-way shuttle valve is integrated in the liquid filling valve 2, six interfaces are arranged, the two-way shuttle valve comprises a port P3, a port A3, a port A4, a port SW, a port T2 and a port O, and the port P3 is a pressure port and is connected with an output port of the hydraulic pump 1; the port A3 is connected to the front brake accumulator 5, the port a4 is connected to the rear brake accumulator 6, the port SW is connected to the port R1 of the hand pump 16 and the port P5 of the parking/emergency brake valve 10, and the port T2 and the port O are connected to the hydraulic tank 17.
The two-way shuttle valve is integrated in the liquid charging valve 2, the front braking energy accumulator 5 and the rear braking energy accumulator 6 can be charged with liquid independently without mutual influence, the liquid charging valve 2 is used for charging the front braking energy accumulator 5 and the rear braking energy accumulator 6 when the pressure value is lower than the lower limit pressure value and stopping charging when the pressure value is higher than the upper limit pressure value, the liquid charging valve 2 is internally throttled, and the liquid charging valve 2 is used for charging liquid at a certain flow value.
As shown in fig. 2, a port X1 of the right front multifunctional brake 12 and a port X2 of the left front multifunctional brake 13 are front wheel service brake ports and are connected with a port a1 of the service brake valve 7 through hydraulic hoses. The interface X3 of the right rear multifunctional brake 14 and the interface X4 of the left rear multifunctional brake 15 are rear wheel service brake interfaces and are connected with the interface A2 of the service brake valve 7 through hydraulic rubber pipes.
The interface Z1 of the right front multifunctional brake 12 and the interface Z2 of the left front multifunctional brake 13 are front wheel parking/emergency braking oil pipe interfaces and are connected with the interface C of the pneumatic control liquid exchange valve 11 through a hydraulic rubber pipe. The interface Z3 of the right rear multifunctional brake 14 and the interface Z4 of the left rear multifunctional brake 15 are rear wheel parking/emergency braking oil pipe interfaces and are connected with the interface D of the pneumatic control liquid exchange valve 11 through a hydraulic rubber pipe.
As shown in figure 2, the front brake accumulator 5, the rear brake accumulator 6 and the parking/emergency accumulator 9 are filled with nitrogen gas under certain pressure at the upper part and hydraulic oil at the lower part, and the hydraulic pump 1 charges the three accumulators through the charging valve 2.
When the oil pressure in any accumulator is lower than the specified pressure, the hydraulic oil enters the accumulator again through the charge valve 2 until the oil pressure in the accumulator reaches the specified pressure.
Fig. 3 shows a pneumatic control schematic. The pneumatic brake part also comprises an air storage tank 18, an air control switch valve 19, an explosion-proof electromagnetic valve 20, an air control starting valve 24, a starting motor 25, an air cut-off control cylinder 23 and an oil cut-off control cylinder 22.
The pneumatic control quick-stop valve 21 is a two-position three-way reversing valve and is provided with three interfaces, wherein the three interfaces comprise an interface P7, an interface R2 and an interface A8, the interface R2 is respectively connected with an interface P12 of the oil-cut control cylinder 22, an interface P11 of the air-cut control cylinder 23 and an interface P6 of the pneumatic control liquid-changing valve 11, a muffler is installed at an interface A8, the air hole quick-stop valve 21 is provided with a push rod type control button, and the inner side surface of the cab door acts on the push rod type control button in a closed state.
The pneumatic control quick-stop valve 21 is a two-position three-way reversing valve, when the cab door is closed, the button of the pneumatic control quick-stop valve 21 is pressed back, the port P7 is communicated with the port R2, and the air source is communicated; when the cab door is opened, the button of the pneumatic emergency stop valve 21 extends, the port P7 and the port R2 are not communicated, and the air source is blocked at the port P7. A pneumatic hard stop valve 21 is mounted inside the cab door.
The explosion-proof electromagnetic valve 20 is a normally closed two-position three-way reversing valve and is provided with an electric connection port L, a connector R3 and a connector P8, the electric connection port L is connected with an external power box, the connector R3 is connected with a connector P7 of the pneumatic control emergency stop valve 21 and a connector P9 of the pneumatic control starting valve 24, and the connector P8 is connected with a connector R5 of the pneumatic control switch valve 19; the explosion-proof electromagnetic valve 20 is installed on the frame.
The electric connection port L of the explosion-proof electromagnetic valve 20 is connected with an external power box through a cable, the interface R3 is connected with the interface P7 of the pneumatic emergency stop valve 21 and the interface P9 of the pneumatic start valve 24 through an air pipe, and the interface P8 is connected with the interface R5 of the pneumatic switch valve 19 through an air pipe.
The pneumatic control starting valve 24 is a two-position three-way reversing valve and is provided with three interfaces, wherein the three interfaces comprise an interface P9, an interface R4 and an interface A10, the interface P9 is connected with an interface R3 of the explosion-proof electromagnetic valve 20 and an interface P7 of the pneumatic control emergency stop valve 21, an interface R4 is connected with one interface of the starting motor 25, and a silencer is installed at the interface A10.
In the initial state, namely the explosion-proof engine stop state, the port P9 and the port R4 are not communicated. When a button of the pneumatic control starting valve 24 is pressed, the port P9 is communicated with the port R4, at the moment, compressed gas in the gas storage tank 18 reaches the inlet of the starting motor 25 through the pneumatic control switch valve 19, the explosion-proof electromagnetic valve 20 and the pneumatic control starting valve 24, and the high-pressure large-flow compressed gas pushes gears in the starting motor 25 to rotate at a high speed to drive a flywheel on the engine to rotate, so that the explosion-proof engine is started.
The starter motor 25 is mounted on the flywheel interface of the explosion-proof engine and is used for driving the engine flywheel to rotate.
The service braking working process: service braking is in a hydraulic braking spring release mode, a single double-circuit braking system is adopted for front braking and rear braking, each braking circuit uses a respective energy accumulator, a front wheel uses a front braking energy accumulator 5 for front wheel braking, and a rear wheel uses a rear braking energy accumulator 6 for rear wheel braking. When a driver steps on a service brake pedal, a port P1 and a port A1 of a service brake valve 7 are communicated, a port P2 and a port A2 are communicated, high-pressure oil of a front brake accumulator 5 flows out through a port A1 of the service brake valve 7 to enter a port X1 of a right front wheel multifunctional brake 12 and a port X2 of a left front wheel multifunctional brake 13, high-pressure oil of a rear brake accumulator 6 flows out through a port A2 of the service brake valve 7 to enter a port X3 of a right rear wheel multifunctional brake 14 and a port X4 of a right rear wheel multifunctional brake 15, and service braking or deceleration is carried out on the explosion-proof rubber-tyred vehicle. When the foot pedal is released, the port P1 and the port a1 of the service brake valve 7 are disconnected, the port P2 and the port a2 are disconnected, the port a1 and the port a2 are communicated with the port T1, high-pressure oil in the front-right multifunctional brake 12 and the front-left multifunctional brake 13 flows back to the hydraulic oil tank 17 from the port a1 of the service brake valve 7 through the port T1, high-pressure oil in the rear-right multifunctional brake 14 and the rear-left multifunctional brake 15 flows back to the hydraulic oil tank 17 from the port a2 of the service brake valve 7 through the port T1, and service braking is released.
Releasing the parking brake process: when the parking brake needs to be released, a driver releases a handle of the parking/emergency brake valve 10, a port P5 of the parking/emergency brake valve 10 is communicated with a port A5, a port A5 is not communicated with a port T3, high-pressure oil of the parking/emergency brake accumulator 9 flows out through the port A5 of the parking/emergency brake valve 10, enters a port A7 of the pneumatic control liquid exchange valve 11, enters a port Z1 of the right front wheel multifunctional brake 12 and a port Z2 of the left front multifunctional brake 13 through a port C, enters a port Z3 of the right rear wheel multifunctional brake 14 and a port Z4 of the left rear multifunctional brake 15 through a port D of the pneumatic control liquid exchange valve 11, and the parking brake of the vehicle is released.
The emergency braking working process comprises the following steps: the emergency brake adopts a spring brake hydraulic pressure release mode, and the multifunctional brake realizes front and rear emergency braking. When emergency braking is needed, a driver pulls up a handle of the parking/emergency braking valve 10, a port P5 and a port A5 of the parking/emergency braking valve 10 are not communicated, a port A5 and a port A6 are not communicated, a port A5 and a port T3 are communicated, high-pressure oil flowing to the parking/emergency braking valve 10 from the parking/emergency accumulator 9 is cut off, at the moment, high-pressure oil flows back to the hydraulic oil tank 17 through a port Z1 of the front right multifunctional brake 12 and a port Z2 of the front left multifunctional brake 13 through a port C and a port T4 of the pneumatic control fluid exchange valve 11, high-pressure oil flows back to the hydraulic oil tank 17 through a port D and a port T4 of the pneumatic control fluid exchange valve 11 from a port Z3 of the rear right multifunctional brake 14 and a port Z4 of the rear left multifunctional brake 15, and the multifunctional brake implements emergency.
The door protection automatic braking working process comprises the following steps: when the cab door 26 is in a closed state, the button of the pneumatic emergency stop valve 21 is in a compressed state, the port P7 is communicated with the port R2, the power supply master switch is turned on, the explosion-proof electromagnetic valve 20 is powered on, the port P8 is communicated with the port R3, the pneumatic switch valve 19 is turned on, the port P10 is communicated with the port R5, compressed gas in the gas storage tank 18 reaches the port P8 and the port R3 of the explosion-proof electromagnetic valve 20 through the port P10 and the port R5 of the pneumatic switch valve 19, the port P7 and the port R2 of the pneumatic emergency stop valve 21 reach the oil break control cylinder 22 and the air break control cylinder 23 and the port P6 of the pneumatic liquid exchange valve 11, the oil break control cylinder 22 and the air break control cylinder 23 are respectively opened, at this time, the port A7 of the pneumatic liquid exchange valve 11 is communicated with the port C, the port A7 is communicated with the port D, the handle of the emergency brake valve 10 is loosened, and high-pressure parking oil of the parking/emergency brake accumulator 9 is communicated with the pneumatic liquid, the parking brake is released from the ports C and D to the port Z1 of the front right multifunctional brake 12, the port Z2 of the front left multifunctional brake 13, the port Z3 of the rear right multifunctional brake 14, and the port Z4 of the rear left multifunctional brake 15, respectively. At this time, the pneumatic control starting valve 24 is pressed down, and the compressed gas reaches the starting motor 25, so that the starting of the anti-explosion rubber-tyred vehicle is completed.
When the cab door 26 is opened, the port P7 and the port R2 of the pneumatic control emergency stop valve 21 are disconnected, compressed air is cut off, air sources of the oil cut-off control cylinder 22 and the air cut-off control cylinder 23 are closed, an oil path and an air path of the explosion-proof engine are cut off, and the engine is shut off. Compressed gas cannot reach a port P6 of the pneumatic control liquid exchange valve 11, a port T4 of the pneumatic control liquid exchange valve 11 is communicated with a port C, a port T4 is communicated with a port D, and high-pressure oil respectively flows back to the hydraulic oil tank 17 through a port Z1 of the right front multifunctional brake 12, a port Z2 of the left front multifunctional brake 13, a port Z3 of the right rear multifunctional brake 14 and a port Z4 of the left rear multifunctional brake 15, so that the emergency stop of the anti-explosion rubber-tyred vehicle is completed.
Claims (3)
1. A hydraulic pressure-pneumatic composite braking system for protecting explosion-proof rubber-tyred car area door, its characterized in that: comprises a hydraulic braking part and a pneumatic braking part;
the hydraulic brake part comprises four groups of multifunctional brakes, a service brake valve (7), a parking/emergency brake valve (10) and a pneumatic liquid exchange valve (11), wherein the four groups of multifunctional brakes are respectively arranged at the left side and the right side of a front axle and a rear axle, each multifunctional brake is controlled by the service brake valve (7) and the pneumatic liquid exchange valve (11), and the parking/emergency brake valve (10) controls the pneumatic liquid exchange valve (11);
the pneumatic brake part comprises a pneumatic control quick-stop valve (21), the pneumatic control quick-stop valve (21) comprises a button, the button is controlled by a cab door of the explosion-proof rubber-tyred vehicle in a closed state, and the pneumatic control quick-stop valve (21) also controls the pneumatic control liquid-exchanging valve (11);
the pneumatic brake part also comprises an air storage tank (18), a pneumatic control switch valve (19), an explosion-proof electromagnetic valve (20), a pneumatic control starting valve (24), a starting motor (25), an air cut-off control cylinder (23) and an oil cut-off control cylinder (22);
the pneumatic emergency stop valve (21) is a two-position three-way reversing valve and is provided with three interfaces, wherein the three interfaces comprise an interface P7, an interface R2 and an interface A8, the interface R2 is respectively connected with an interface P12 of the fuel cut-off control cylinder (22), an interface P11 of the gas cut-off control cylinder (23) and an interface P6 of the pneumatic liquid change valve (11), the interface A8 is provided with a silencer, the pneumatic emergency stop valve (21) is provided with a push rod type control button, and the inner side surface of the cab door acts on the push rod type control button in a closed state;
the explosion-proof electromagnetic valve (20) is a normally closed two-position three-way reversing valve and is provided with an electric connection port L, a connector R3 and a connector P8, the electric connection port L is connected with an external power box, a connector R3 is connected with a connector P7 of the pneumatic control emergency stop valve (21) and a connector P9 of the pneumatic control starting valve (24), and a connector P8 is connected with a connector R5 of the pneumatic control switch valve (19);
the pneumatic control starting valve (24) is a two-position three-way reversing valve and is provided with three interfaces, wherein the three interfaces comprise an interface P9, an interface R4 and an interface A10, the interface P9 is connected with an interface R3 of the explosion-proof electromagnetic valve (20) and an interface P7 of the pneumatic control quick-stop valve (21), an interface R4 is connected with an interface of the starting motor (25), and a silencer is installed at the interface A10.
2. The hydraulic-pneumatic compound brake system for blast-proof rubber-tyred vehicle belt door protection according to claim 1, characterized in that: the hydraulic braking part also comprises a hydraulic pump (1), a liquid charging valve (2), an energy accumulator (5) for front braking, an energy accumulator (6) for rear braking, an energy accumulator (9) for parking/emergency and a hand pump (16);
the parking/emergency brake valve (10) is an adjustable pressure reversing valve and is provided with four interfaces, wherein the four interfaces comprise an interface P5, an interface T3, an interface A5 and an interface A6, the interface P5 is connected with an interface R1 of a hand pump (16) and an oil outlet of a one-way valve through a hydraulic rubber tube, an interface T3 is connected with a hydraulic oil tank (17), an interface A5 is connected with an interface A7 of a pneumatic liquid exchange valve (11), and an interface A6 is connected with a parking/emergency energy accumulator (9) and a parking/emergency pressure gauge (8);
the service brake valve (7) is a double-loop series adjustable brake valve, five interfaces are arranged on the valve group and comprise an interface P1, an interface P2, an interface A1, an interface A2 and an interface T1, the interface P1 is connected with the front brake energy accumulator (5) and the front brake pressure gauge (4), the interface P2 is connected with the rear brake energy accumulator (6) and the rear brake pressure gauge (3), the interface A1 is respectively connected with an interface X1 of the right front multifunctional brake (12) and an interface X2 of the left front multifunctional brake (13), the interface A2 is respectively connected with an interface X3 of the right rear multifunctional brake (14) and an interface X4 of the left rear multifunctional brake (15), and the interface T1 is connected with the hydraulic oil tank (17);
the pneumatic control liquid exchange valve (11) is provided with five interfaces comprising an interface A7, an interface T4, an interface C, an interface D and an interface P6, wherein the interface A7 is connected with an interface A5 of the parking/emergency brake valve (10), the interface T4 is connected with the hydraulic oil tank (17), the interface C is respectively connected with an interface Z1 of the right front multifunctional brake (12) and an interface Z2 of the left front multifunctional brake (13), the interface D is respectively connected with an interface Z3 of the right rear multifunctional brake (14) and an interface Z4 of the left rear multifunctional brake (15), and the interface P6 is connected with the pneumatic control emergency stop valve (21), the fuel cut-off control cylinder (22) and the fuel cut-off control cylinder (23);
the two-way shuttle valve is integrated in the liquid filling valve (2), six interfaces are arranged, the six interfaces comprise an interface P3, an interface A3, an interface A4, an interface SW, an interface T2 and an interface O, and the interface P3 is a pressure port and is connected with an output port of the hydraulic pump (1); the interface A3 is connected with the front brake accumulator (5), the interface A4 is connected with the rear brake accumulator (6), the interface SW is connected with the interface R1 of the hand pump (16) and the interface P5 of the parking/emergency brake valve (10), and the interface T2 and the interface O are connected with the hydraulic oil tank (17).
3. The hydraulic-pneumatic compound brake system for blast-proof rubber-tyred vehicle belt door protection according to claim 1 or 2, characterized in that: the multifunctional brake comprises a static shell (31), a middle shell (32), a movable shell (34), a bearing I (35), a bearing II (36), a static sheet (40), a movable sheet (41), a small piston (42) and a large piston (43), the novel wheel hub is characterized in that a static shell (31) is connected with an axle housing fixed disk (30) through a static shell bolt (29), an intermediate shell (32) is connected with the static shell (31) and an end cover (33) through bolts, a movable shell (34) is connected with a half shaft (38) through a half shaft bolt (39), a bearing I (35) and a bearing II (36) are installed on a shaft tube (37), a tire rim (27) is installed on the movable shell (34) through a tire bolt (28), a static sheet (40) is installed on the intermediate shell (32), a movable sheet (41) is installed on the movable shell (34), a small piston (42) and a large piston (43) are installed on the intermediate shell (32), and the movable sheet (41) and the movable shell (34) rotate together with the tire rim (27).
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| CN201710661125.2A CN107972650B (en) | 2017-08-04 | 2017-08-04 | Hydraulic-pneumatic composite braking system with door protection for explosion-proof rubber-tyred vehicle |
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| CN201710661125.2A CN107972650B (en) | 2017-08-04 | 2017-08-04 | Hydraulic-pneumatic composite braking system with door protection for explosion-proof rubber-tyred vehicle |
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| CN107972650B true CN107972650B (en) | 2020-07-03 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108591314B (en) * | 2018-06-29 | 2020-04-28 | 山推工程机械股份有限公司 | Composite braking system |
| CN109229134B (en) * | 2018-11-14 | 2024-05-07 | 粤水电轨道交通建设有限公司 | Bidirectional emergency anti-slip braking device for electric locomotive |
| CN110588617B (en) * | 2019-09-02 | 2021-11-12 | 中国煤炭科工集团太原研究院有限公司 | Control system for realizing driving and emergency parking braking functions of front wheels and rear wheels of explosion-proof vehicle |
| CN116161003A (en) * | 2022-12-31 | 2023-05-26 | 江苏天明特种车辆有限公司 | Automatic shutdown braking system of mining explosion-proof trackless rubber-tyred vehicle |
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