WO2016019865A1 - Superposition-preventing valve, brake cylinder assembly having same, and brake control method thereof - Google Patents

Abstract

Provided is a superposition-preventing valve, used for vehicle braking and comprising a valve body (1); the valve body (1) is internally provided with a service brake air supply path (1-a); a parking brake air supply path (1-b); a slider chamber (1-c) capable of communication with the service brake air supply path (1-a) and the parking brake air supply path (1-b); a brake air supply extension path (1-e), the first end of which is provided with an air inlet (1-c-2) in communication with the slider chamber (1-c), and the second end of which is provided with an air outlet (1-e-1), said air outlet (1-e-1) being located on the outer surface of the valve body (1); and a slider (2) capable of moving between the first end section and the second end section of the slider chamber (1-c); when the slider (2) is located at the first end section, the brake air supply extension path (1-e) is capable of communication only with the parking brake air supply path (1-b), and the brake air supply extension path (1-e) is isolated from the service brake air supply path (1-a); when the slider (2) is located at the second end section, the brake air supply extension path (1-e) is capable of communication only with the service brake air supply path (1-a), and the brake air supply extension path (1-e) is isolated from the parking brake air supply path (1-b). Also disclosed is a superposition-preventing valve brake cylinder assembly and brake control method thereof. The superposition-preventing valve effectively solves the problem of a train driver releasing the compressed gas in the parking brake cylinder early owing to improper operation or error, and avoids the superposition of the force of the service brake and the force of the parking brake, ensuring the safe operation of the vehicle and improving the service life of the basic braking apparatus.

Description

Anti-superimposition valve, brake cylinder assembly therewith and brake control method thereof Technical field

The present invention relates to the field of rail transit basic braking, and more particularly to an anti-superimposition valve for a basic brake device and a brake cylinder assembly therewith and a brake control method therefor.

Background technique

The basic brake device is a key component of rail transit. The brake force is applied by the basic brake device to enable the train to stop at a specified distance. In order to achieve the usual braking and parking brakes of the train, the basic brakes are usually provided with a common brake cylinder and a parking brake cylinder. The parking brake cylinder adopts the spring storage capacity (energy). When the train is running normally, the parking brake cylinder is filled with air. The compressed air compresses the spring against the spring force to store energy for the spring. When the train brakes, the air is filled into the common brake cylinder to decelerate the train. When the train stops, the air in the common brake cylinder and the parking brake cylinder is exhausted, and the stored energy of the spring is released to realize the parking. brake.

The common brake cylinder and the parking brake cylinder are respectively operated, and their respective pipelines are also separately connected. During the train brake stop, the common brake and the parking brake are not allowed to be simultaneously implemented. However, due to improper operation or mistakes of the driver, the parking switch may be activated when the common brake is not over, and the air in the parking brake cylinder is released in advance, so that the common brake and the parking brake act simultaneously. If the common brake and the parking brake act at the same time, the common braking force and the parking brake force will be superimposed. When the train braking force exceeds the wheel-rail adhesion force, the train will produce a sliding phenomenon, which will affect the safety of the driving. At the same time, due to the superposition of the common braking force and the parking brake force, the wear of the internal components of the basic brake device is accelerated, thereby affecting the service life of the basic brake device.

Summary of the invention

It is an object of the present invention to provide an anti-stacking valve for vehicle braking.

Another object of the present invention is to provide a brake cylinder assembly for vehicle braking.

It is still another object of the present invention to provide a control method for vehicle braking.

It is still another object of the present invention to provide another control method for vehicle braking.

To achieve the above object or other objects, the present invention provides the following technical solutions.

According to an aspect of the present invention, an anti-stacking valve for vehicle braking is provided, The valve body includes: a common brake air supply passage; a parking brake air supply passage; a slider chamber capable of connecting the common brake air supply passage and the parking brake air supply passage And a brake air supply extension, the first end of which is provided with an air inlet communicating with the slider chamber, and the second end thereof is provided with an exhaust port, the exhaust port being located at an outer surface of the valve body; Also included is a slider movable between a first end and a second end within the slider cavity; wherein the brake supply extends when the slider is at the first end The track can only be in communication with the parking brake air supply passage, and the brake air supply extension is isolated from the common brake air supply passage; when the slider is located at the second end portion, The brake air supply extension can only communicate with the common brake air supply passage, and the brake air supply extension is isolated from the parking brake air supply passage.

According to another aspect of the present invention, a brake cylinder assembly for vehicle braking is provided, comprising a brake cylinder block and an anti-superposition valve as described above; the brake cylinder block is intermediate Separating from the inside, and forming a common brake cylinder block and a parking brake cylinder block on both sides; the common brake cylinder block and the parking brake cylinder block and the intermediate body respectively Forming a common brake cylinder piston chamber and a parking brake cylinder piston chamber; the anti-superposition valve communicates with the common brake cylinder piston chamber through the common brake air supply passage, and extends through the brake air supply The passage is in communication with the piston chamber of the parking brake cylinder.

According to still another aspect of the present invention, a control method for vehicle braking is provided, wherein when the vehicle does not need to brake, the compressed gas enters the slider chamber via the parking brake air supply passage; moving the slider up to The first end portion blocks the common brake air supply passage; at this time, the parking brake air supply passage communicates with the brake air supply extension passage, and the common brake air supply passage and the brake air supply extension passage Isolating; the compressed gas enters the parking brake cylinder piston chamber through the brake supply air extension passage and stores energy in the parking brake cylinder piston chamber; and/or when the vehicle performs a common braking step, compresses The gas enters the air outlet of the common brake air supply passage through the common brake air supply passage, and enters the common brake cylinder piston chamber to provide braking force; at this time, the compressed air in the parking brake air supply passage The air pressure is greater than the air pressure of the compressed air in the common brake air supply passage, and the slider is held at the first end portion and blocks the common brake air supply passage, so that the parking brake air supply passage is connected with the brake air supply extension passage. And the common brake air supply passage is isolated from the brake air supply extension passage, The compressed gas continues to store energy in the piston chamber of the parking brake cylinder; and/or the compression in the piston chamber of the common brake cylinder and the parking brake cylinder when the vehicle performs the parking brake step The gas is discharged successively, and the energy stored in the piston chamber of the parking brake cylinder The amount is released to achieve parking brake, at which point the slider moves to the second end and blocks the parking brake air supply.

According to still another aspect of the present invention, a control method for a vehicle brake is provided, wherein when the parking brake step of the vehicle is executed when the usual braking step has not been completed, the parking brake cylinder is in the piston chamber The compressed gas is released in advance, and the air pressure in the piston chamber of the parking brake cylinder is lower than the air pressure in the piston chamber of the common brake cylinder, so that the slider moves down to the second end and blocks the parking brake air supply passage. The common brake air supply passage is connected with the brake air supply extension passage, and the parking brake air supply passage is isolated from the brake air supply extension passage, and the compressed gas is re-calculated to store energy in the piston cavity of the parking brake cylinder. , release the parking brake.

The invention provides a simple anti-superimposition valve. The common brake air supply channel of the anti-superimposition valve is connected with a common brake cylinder, and the brake air supply extension channel is in communication with the parking brake cylinder. If the train driver mishandles or fails, the air in the parking brake cylinder is released in advance. At this time, the air in the brake air supply passage enters the parking brake cylinder through the slider chamber and the brake air supply extension passage. The brake cylinder air pressure relieves the force of the parking brake cylinder, avoids the superposition of the common braking force and the parking brake force, ensures the safe operation of the vehicle, and improves the service life of the basic brake device. The common brake air supply passage of the present invention may have two air inlets, and the two air inlets are respectively disposed on different faces of the valve body, and the parking brake air supply passage may have two air inlets, two The air inlets are also respectively arranged on different faces of the valve body. When installing, according to the specific position, one of the air inlets is selected, and the other air inlet is blocked, on the one hand, the pipeline connection is ensured, and the supply is ensured. The flexibility of the gas, on the other hand, facilitates the processing of the valve body.

DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view of an anti-stacking valve of one embodiment of the present invention.

Figure 2 is a side elevational view of the anti-stacking valve of Figure 1 in a longitudinal direction.

Figure 3 is a front elevational view of the anti-stacking valve of Figure 1 in a longitudinal direction.

Figure 4 is a cross-sectional view of the rear side of the anti-stacking valve of Figure 1 in the longitudinal direction with the slider at the first end.

Figure 5 is a cross-sectional view of the rear side of the anti-stacking valve of Figure 1 in the longitudinal direction with the slider at the second end.

Figure 6 is a cross-sectional view of the rear side of the anti-stacking valve of Figure 1 in the longitudinal direction, wherein the mounting position of the screw plug changes.

Figure 7 is a cross-sectional view of the rear side of the anti-stacking valve in the longitudinal direction of another embodiment of the present invention, wherein the slider is at the second end.

Figure 8 is a cross-sectional view of the rear side of the anti-stacking valve of Figure 7 in the longitudinal direction, wherein the mounting position of the plug is varied and the slider is at the first end.

Figure 9 is a cross-sectional view of the rear side of the anti-superposition valve in the longitudinal direction of still another embodiment of the present invention, wherein the slider is at the second end.

Figure 10 is a cross-sectional view of the rear side of the anti-stacking valve of Figure 9 in the longitudinal direction, wherein the mounting position of the screw plug changes and the slider is at the first end.

Figure 11 is a cross-sectional view of the anti-superposition valve in the longitudinal direction of the rear side of the still further embodiment of the present invention, wherein the slider is at the second end.

Figure 12 is a cross-sectional view of the rear side of the anti-stacking valve of Figure 11 in the longitudinal direction, wherein the mounting position of the screw plug changes and the slider is at the first end.

Figure 13 is a front elevational view of the brake cylinder assembly of one embodiment of the present invention.

Figure 14 is a perspective view of the brake cylinder block of Figure 13;

Figure 15 is a side view of the brake cylinder block of Figure 13;

Figure 16 is a front elevational view of the brake cylinder block of Figure 13;

1	Valve body
		1-a	Common brake air supply channel
1-a-1	The first air inlet of the common brake air supply passage
		1-a-2	The second air inlet of the common brake air supply passage
1-a-3	Commonly used brake air supply port
		1-a-4	The second section of the common brake air supply passage
1-a-5	The first section of the common brake air supply passage
		1-b	Parking brake air supply
1-b-1	The first air inlet of the parking brake air supply passage
		1-b-2	The second air inlet of the parking brake air supply passage
1-b-4	The first section of the parking brake air supply duct
		1-b-5	The second section of the parking brake air supply passage
1-c	Slider cavity

1-d	First bottom hole
		1-e	Brake air supply extension
1-e-1	Exhaust port of brake air supply extension
		1-e-2	Air intake of brake air supply extension
1-f-1	First vent
		1-f-2	Second vent
1-1	Body part
		1-2	Pillar block
2	Slider
		3	Upper thread plug
4	Seal ring
		5	Lower thread plug
10	Brake cylinder
		10-a	Common brake cylinder air inlet
10-b	Parking brake cylinder inlet
		10-1	Common brake cylinder block
10-2	Parking brake cylinder block
		10-3	Intermediate
10-4	platform
		11	bolt
20	Anti-superimposition valve

detailed description

Figures 1 through 12 illustrate several embodiments of the anti-stacking valve of the present invention, which differ only in a number of detail configurations, most of which are versatile. For the first embodiment, it has a valve body 1 in which a slider chamber 1-c, a common brake air supply passage 1-a, and a parking brake air supply passage 1-b are provided. Taking the illustration as a coordinate reference, the common brake air supply passage 1-a and the parking brake air supply passage 1-b are respectively located on the upper and lower sides of the slider chamber 1-c. The common brake air supply passage 1-a and the parking brake air supply passage 1-b can communicate with the slider chamber 1-c, and the brake air supply is arranged on the valve body 1 near the middle of the slider chamber 1-c. The extension lane 1-e, one end of the brake air supply extension lane 1-e is provided with an air inlet 1-e-2 communicating with the slider chamber 1-c, and the other end is provided with a row The air port 1-e-1, the exhaust port 1-e-1 is located on the outer surface of the valve body 1.

In addition, the slider chamber 1-c is further provided with a slider 2, and the disposed slider 2 can reciprocate between the first end portion and the second end portion in the slider chamber 1-c, and when it moves to At the first end, the intake port 1-e-2 of the brake air supply extension 1-e communicating with the slider chamber 1-c can be exposed, and the brake air supply extension 1-e and the parking can be made. The brake air supply passage 1-b is connected, and the common brake air supply passage 1-a is isolated from the brake air supply extension passage 1-e (see Fig. 4); when it moves to the second end portion, it can be exposed and slipped. The brake air supply passage of the block chamber 1-c is connected to the intake port 1-e-2 of the extension lane 1-e, and the brake air supply extension passage 1-e is connected to the common brake air supply passage 1-a, and The parking brake air supply passage 1-b is isolated from the brake air supply extension 1-e (see Figure 5).

In one embodiment, the slider 2 is a hollow metal cylinder with an elastomer embedded therein. Such an embodiment applies the end face of the slider 2 for sealing, which enables a better sealing effect and at the same time has a small sliding resistance.

Wherein, the elastic body can be pressed into the hollow metal cylinder by means of interference fit. And the elastomer has a length greater than that of the hollow metal cylinder, that is, it can protrude from both ends of the hollow metal cylinder to ensure sealing contact with the vent holes at the upper and lower ends. However, such an implementation is relatively difficult and places higher demands on the flatness of the end faces.

The elastomer described herein may be composed of a resilient material such as rubber or elastomer. Preferably, the elastomer may be a columnar vulcanized rubber body.

Preferably, the upper and lower end faces of the elastic body are provided with grooves, and the arrangement of the grooves is mainly used to increase the contact area of the intake air, and the effect is particularly prominent when the air is laterally inhaled. Specifically, when the compressed gas does not push the slider 2 vertically, but flows to the slider at an angle (even at 90°), it can enter the groove first; and the slider is realized by the compressed gas entering the groove. 2 moves.

In addition, referring to FIG. 7 to FIG. 8, in still another embodiment, the slider 2 is a metal cylinder, and an outer circumference thereof is provided with an elastic ring (including a vulcanized rubber ring). During the reciprocating motion of the slider 2, this embodiment mainly applies the cylindrical outer surface of the slider 2 for sealing. Such a structure in which the cylindrical outer surface of the slider 2 is sealed will be slightly inferior to the structural form in which the end face seal is applied, and will bring about greater running resistance, but it has an advantage of being easy to realize.

In addition, referring to FIG. 9 to FIG. 10, in another embodiment, the slider 2 is a metal cylinder. And an elastic pad (including a vulcanized rubber pad) is disposed on the upper and lower end faces of the metal cylinder; wherein the diameter of the elastic pad is less than or equal to the outer diameter of the metal cylinder. This embodiment also applies a better end face seal with a small sliding resistance and a relatively simple implementation.

Furthermore, referring to FIGS. 11 to 12, it is of course also possible to provide a certain number of annular grooves at the outer circumference of the metal column, an elastic sealing ring (including a vulcanized rubber ring) or a wave-shaped elastic shape on the annular groove. Seals can achieve the purpose of reducing running resistance.

Of course, it is also possible to use a cylindrical body having grooves on the upper and lower end faces, and at the same time, an annular elastic material layer (including a vulcanized rubber layer) is provided on the end faces thereof.

Therefore, the structural form of the appropriate slider 2 can be selected according to the actual application.

In addition, since the slider chamber 1-c is formed inside the valve body 1, in order to facilitate machining, a long hole may be directly formed in the longitudinal direction of the bottom surface of the valve body 1, and the portion of the long hole near the middle of the valve body 1 is a slider. The cavity 1-c, and the portion near the bottom of the valve body 1 is the first bottom hole 1-d. The first bottom hole 1-d is blocked by the column block 1-2, and the column block 1-2 penetrates into the first bottom hole 1-d and passes through the parking brake air supply passage 1-b. A seal ring 4 is provided between the orifice of the first bottom hole 1-d and the column block 1-2. The plug 1-2 can also be regarded as a part of the valve body, and the valve body is divided into upper and lower parts at the position where the slider cavity is set, so as to facilitate the installation of the slider, and the sealing ring is provided after the completion of the slider installation. The components are used to re-engage the upper and lower portions of the valve body (not shown).

The first vent hole 1-f-1 is disposed on the valve body portion 1-1 between the common brake air supply passage 1-a and the slider chamber 1-c, and the first vent hole 1-f-1 will be commonly used. The air supply passage 1-a is in communication with the slider chamber 1-c. In addition, the aperture of the first vent hole 1-f-1 should be selected within a range that satisfies both the requirements of the anti-superposition valve for sealing and the inflation speed during operation. The former requires that it cannot be too large, while the latter requires that it cannot be too small.

A second vent hole 1-f-2 is disposed on the valve body portion 1-1 between the parking brake air supply passage 1-b and the slider chamber 1-c, and the second vent hole 1-f-2 is stationed The brake air supply passage 1-b is in communication with the slider chamber 1-c. It should be understood that when the valve body portion includes the column block 1-2 inserted therein, the second vent hole 1-f-2 includes a through hole disposed in the column block 1-2 in the longitudinal direction and disposed in the lateral direction a through hole in the column block 1-2, the second vent hole 1-f-2 causes the parking brake air supply passage 1-b to communicate with the slider chamber 1-c in the column block 1-2, thereby The parking brake air supply passage 1-b can communicate with the slider chamber 1-c through the column block 1-2. It should be understood that the second vent hole 1-f-2 should also satisfy the anti-superposition valve for sealing and inflating during operation with respect to the aperture. Select within the range of speed requirements. The former requires that it cannot be too large, while the latter requires that it cannot be too small.

In addition, as an alternative, the vent hole may not be provided between the slider chamber 1-c and the common brake air supply passage 1-a, but in the slider chamber 1-c and the common brake air supply passage 1-a The communication portion is fixed with a design stop or a boss along the inner circumferential surface of the slider chamber, or a stopper or a boss is provided on the inner circumferential surface of the lateral through hole of the common brake air supply passage 1-a. This alternative also achieves the effect of communicating the slider chamber 1-c with the usual brake air supply passage 1-a, and can also limit the slider from coming out of the slider chamber 1-c.

The common brake air supply passage 1-a has at least one air inlet and one air outlet 1-a-3. For example, in the present embodiment, it has a first intake port 1-a-1 and a second intake port 1-a-2. In this case, you need to choose to open one of the air inlets and close the other air inlet.

Specifically, in the illustrated embodiment, the first intake port 1-a-1 and the second intake port 1-a-2 of the common brake air supply passage 1-a are respectively disposed on the front side I of the valve body 1 On the top surface of the upper and the valve body 1, the air outlet 1-a-3 of the brake air supply passage 1-a is disposed on the right side surface II of the valve body 1. The common brake air supply passage 1-a adopts the first intake port 1-a-1 intake air, and the second intake port 1-a-2 is blocked by the upper screw plug 3, the blocked aperture and the upper snail A sealing ring 4 is arranged between the plugs 3.

The upper portion of the valve body 1 is provided with a first section 1-a-5 and a second section 1-a-4 of a common brake air supply passage. The first section 1-a-5 of the common brake air supply passage includes a top hole provided on a top surface of the valve body 1 and a first horizontal hole provided at a side of the valve body, and the first horizontal hole is connected to the top hole . The second section 1-a-4 of the conventional brake air supply passage includes a second transverse hole provided at the side of the valve body 1. The first transverse hole of the common brake air supply passage forms a bend with the second horizontal hole of the common brake air supply passage, and the two together with the top hole form a common brake air supply passage 1-a. The second transverse hole of the common brake air supply passage 1-a communicates with the external opening to be the air outlet 1-a-3. The first transverse hole and the top hole of the common brake air supply passage 1-a are respectively connected to the first air inlet 1-a-1 and the second air inlet 1-a-2. The first vent hole 1-f-1 is located between the first section 1-a-5 of the common brake air supply passage and the slider chamber 1-c.

The parking brake air supply passage 1-b has at least one air inlet. For example, in the present embodiment, it has a first intake port 1-b-1 and a second intake port 1-b-2. In this case, you need to choose to open one of the air inlets and close the other air inlet.

Specifically, in the illustrated embodiment, the first intake port 1-b-1 and the second intake port 1-b-2 of the parking brake air supply passage 1-b are respectively disposed on the bottom surface of the valve body 1 and Brake for front side I The exhaust port 1-e-1 of the gas extension passage is provided on the right side surface II of the valve body 1. The parking brake air supply passage 1-b adopts the first intake port 1-b-1 intake air, and the second intake port 1-b-2 is blocked by the lower screw plug 5, and the blocked port is parked. A seal ring 4 is provided between the orifice of the second section 1-b-5 of the brake air supply passage and the lower screw plug 5.

The lower portion of the valve body 1 is provided with a first section 1-b-4 and a second section 1-b-5 of the parking brake air supply passage 1-b. The first section 1-b-4 of the parking brake air supply passage includes a second bottom hole provided on the bottom surface of the valve body 1, and the second section 1-b-5 of the parking brake air supply passage includes a third transverse hole is disposed on a side surface of the valve body 1; wherein a boundary between the third horizontal hole and the second bottom hole forms a bend. The third transverse hole and the second bottom hole of the parking brake air supply passage constitute a parking brake air supply passage 1-b. The second bottom hole and the third horizontal hole of the parking brake air supply passage respectively communicate with the first air inlet 1-b-1 and the second air inlet 1-b of the parking brake air supply passage 1-b -2.

When the column block and the valve body are in a split structure, the column block 1-2 penetrates the second section 1-b-5 of the parking brake air supply passage on the valve body, and the second vent hole 1-f- 2 An inverted T-shaped hole is formed in the column block 1-2 between the second section 1-b-5 of the parking brake air supply passage and the slider chamber 1-c. Specifically, the second vent hole 1-f-2 at this time includes an elongated hole in the longitudinal direction inside the column block 1-2 and a through hole in the lateral direction.

When the column plug and the valve body are of a one-piece structure, the second vent hole only includes the elongated hole in the longitudinal direction of the column block 1-2, and does not include the through hole in the lateral direction. The hole in the lateral position at this time will exist as part of the second section 1-b-5 of the parking brake air supply passage.

The air outlet 1-a-3 of the common brake air supply passage of the anti-superimposition valve 20 and the exhaust port 1-e-1 of the brake air supply passage are both disposed on the right side surface II of the valve body 1, the valve body The right side face 1 of 1 is the machined plane.

In addition, referring to Figures 13-16, an embodiment of the brake cylinder assembly of the present invention is provided having a brake cylinder 10 and an anti-superposition valve 20 through which the cavity of the brake cylinder block 10 passes. 3 separated, the cylinder parts on both sides of the intermediate body 10-3 are the common brake cylinder block 10-1 and the parking brake cylinder block 10-2, the common brake cylinder block 10-1 and the parking The two chambers formed by the brake cylinder block 10-2 and the intermediate body are respectively a common brake cylinder piston chamber and a parking brake cylinder piston chamber. A platform 10-4 is disposed on one side of the brake cylinder block 10. The platform 10-4 is provided with a common brake cylinder intake port 10-a communicating with a common brake cylinder piston chamber, and a parking brake cylinder. The parking cylinder intake port 10-b of the piston chamber is connected. In the drawing, the brake cylinder 10 The intermediate body 10-3 is provided with a hole for mounting the member, and a sealing ring is arranged in the hole to ensure that the common brake cylinder piston chamber and the parking brake cylinder piston chamber are isolated.

The anti-superimposition valve A is connected to the platform 10-4 of the brake cylinder block 10 through three bolts 11, and the right side plane of the valve body 1 is attached to the platform 10-4 of the brake cylinder block 10, and the brake is commonly used. The air outlet 1-a-3 of the air supply passage coincides with the common brake cylinder air inlet 10-a on the brake cylinder block platform 10-4, and the exhaust port 1-e-1 of the brake air supply extension passage It coincides with the parking brake cylinder intake port 10-b on the brake cylinder block platform 10-4.

In addition, a brake control method for use with the anti-stacking valve and/or brake cylinder assembly of the present invention is also provided. One embodiment of the method will now be described with reference to Figures 1-5.

When the vehicle is running normally (not braking), the first intake port 1-b-1 of the parking brake air supply passage is filled with compressed gas to the parking brake air supply passage 1-b, and the compressed gas passes through the first The second vent hole 1-f-2 enters the slider chamber 1-c, and the air pressure pushes the slider 2 upward to the first end portion, and blocks the first vent hole 1-f-1 (see FIG. 4), thereby The parking brake air supply passage 1-b is connected to the brake air supply extension passage 1-e, and the compressed gas enters the parking vehicle via the brake air supply extension passage 1-e and the parking brake cylinder intake port 10-b. In the brake cylinder, the compressed gas compresses the spring disposed therein against the spring force to store energy for the spring.

When the vehicle performs the usual braking step, the compressed air is filled into the common brake air supply passage 1-a through the first intake port 1-a-1 of the common brake air supply passage, and the compressed gas is supplied through the common brake air supply. The air outlet 1-a-3 of the lane 1-a and the common brake cylinder air inlet 10-a enter the common brake cylinder.

The air pressure is converted into the piston thrust, and the piston thrust is transmitted through a series of complicated forces inside the basic brake device, and finally converted into the common braking force of the vehicle to realize the brake parking. Because the parking brake air pressure provided by the train is usually greater than the common brake air pressure, that is, the air pressure in the parking brake air supply passage 1-b is greater than the air pressure in the common brake air supply passage 1-a, so the slider 2 is always at The first end portion of the slider chamber 1-c blocks the first vent hole 1-f-1, and the compressed gas of the parking brake air supply passage 1-b is supplied to the brake chamber via the slider chamber 1-c. The extension lane 1-e and the parking brake cylinder intake port 10-b enter the parking brake cylinder, so that the parking brake cylinder is in the compression spring energy storage state.

When the vehicle performs the parking brake step, the compressed gas in the common brake cylinder and the parking brake cylinder is exhausted, and the energy stored in the parking brake cylinder spring is released to realize the parking brake. Wherein, before the compressed gas in the common brake cylinder and the parking brake cylinder is exhausted, the slider 2 is always at the first end in the slider chamber 1-c and blocks the first vent hole 1-f-1; After the compressed gas is exhausted, Due to its potential energy, the slider 2 drops to the second end of the lower portion of the slider chamber 1-c.

If the driver does not operate properly or makes mistakes, the compressed air in the parking brake cylinder is released in advance when the brake is not finished. When the air pressure of the parking brake cylinder is lower than the air pressure of the common brake cylinder, it is in the slider chamber 1- The slider 2 at the upper end of c falls to the second end of the lower portion of the slider chamber 1-c and blocks the second vent hole 1-f-2. At this time, the brake air supply passage 1-a and the brake supply are commonly used. The gas extension passage 1-e is connected, and the compressed gas enters through the common brake air supply passage 1-a, the slider chamber 1-c, the brake air supply extension lane 1-e, and the parking brake cylinder intake port 10-b. The parking brake cylinder re-energizes the spring to release the parking brake, thus avoiding the simultaneous action of the common brake cylinder and the parking brake cylinder.

Fig. 6 shows another embodiment of the anti-stacking valve 20 of the present invention. On the one hand, the first intake port is intakeed by the second intake port 1-a-2 of the common brake air supply passage 1-a. 1-a-1 is blocked by the upper screw plug 3, and a sealing ring 4 is arranged between the blocked orifice and the upper screw plug 3. On the other hand, the second intake port 1-b-2 of the parking brake air supply passage 1-b is intakeed, and the first intake port 1-b-1 is blocked by the lower screw plug 5, blocked. A sealing ring 4 is provided between the mouth and the lower plug 5 . The rest is the same as the first embodiment of the present invention.

A third embodiment (omitted view) of the anti-stacking valve 20 of the present invention is also provided, which uses the second intake port 1-a-2 of the common brake air supply passage 1-a for intake, the first intake air The port 1-a-1 is blocked by the upper screw block 3, the parking brake air supply channel 1-b adopts the first air inlet 1-b-1 intake, and the second air inlet 1-b-2 Blocked by the lower screw plug 5.

A fourth embodiment (omitted view) of the anti-stacking valve 20 of the present invention is provided, which uses the first intake port 1-a-1 of the common brake air supply passage 1-a for intake, the second intake port 1-a-2 is blocked by the upper screw block 3. The second intake port 1-b-2 of the parking brake air supply passage 1-b is intakeed, and the first intake port 1-b-1 is blocked by the lower screw plug 5.

Claims (23)

1. An anti-superimposition valve for vehicle braking, characterized in that it comprises a valve body (1); the valve body (1) is provided with:

   Common brake air supply (1-a);

   Parking brake air supply (1-b);

   a slider chamber (1-c) capable of communicating the common brake air supply passage (1-a) and the parking brake air supply passage (1-b);

   And a brake air supply extension (1-e), the first end of which is provided with an air inlet (1-e-2) communicating with the slider chamber (1-c), and the second end thereof is provided An exhaust port (1-e-1), the exhaust port (1-e-1) being located on an outer surface of the valve body (1);

   Also included is a slider (2) movable between a first end and a second end within the slider cavity (1-c);

   Wherein, when the slider (2) is located at the first end, the brake air supply extension (1-e) can only communicate with the parking brake air supply passage (1-b) And the brake air supply extension (1-e) is isolated from the common brake air supply passage (1-a);

   When the slider (2) is located at the second end, the brake air supply extension (1-e) can only communicate with the common brake air supply passage (1-a), and The brake air supply extension (1-e) is isolated from the parking brake air supply passage (1-b).
2. The anti-stacking valve according to claim 1, wherein a first portion of the valve body portion between the common brake air supply passage (1-a) and the slider chamber (1-c) is provided a vent hole (1-f-1), the first vent hole (1-f-1) communicating the common brake air supply passage (1-a) and the slider chamber (1-c); And/or a valve body portion between the parking brake air supply passage (1-b) and the slider chamber (1-c) is provided with a second vent hole (1-f-2), The second vent hole (1-f-2) communicates the parking brake air supply passage (1-b) with the slider chamber (1-c).
3. The anti-stacking valve according to claim 1, wherein said common brake air supply passage (1-a) is provided with at least one air inlet and one air outlet; said at least one air inlet is disposed at The side or top surface of the valve body.
4. The anti-stacking valve according to claim 3, wherein said common brake air supply passage (1-a) is provided with a first intake port (1-a-1) and a second which can be opened or closed. Intake Port (1-a-2); and one of them is on and the other is off.
5. The anti-stacking valve according to claim 4, wherein a first intake port (1-a-1) of said common brake air supply passage (1-a) is disposed in said valve body (1) a second intake port (1-a-2) of the common brake air supply passage (1-a) is disposed on a top surface of the valve body (1); the common brake air supply passage The air outlet (1-a-3) is disposed at a side of the valve body (1) and with the first air inlet (1-a-1) of the common brake air supply passage (1-a) Different directions on the side.
6. The anti-stacking valve according to claim 5, wherein said common brake air supply passage includes a first intake port (1-a-1) and a second intake port (1-a-2) a first section connected, and a second section communicating with the air outlet (1-a-3); the first section includes a top hole provided on a top surface of the valve body (1) and is disposed at the valve a first transverse hole of the body side, the first horizontal hole is in communication with the top hole; the second section includes a second horizontal hole disposed at a side of the valve body; wherein the first horizontal hole and the second horizontal hole Form a bend between them.
7. The anti-stacking valve according to claim 6, wherein the first intake port (1-a-1) and the second intake port (1-1) of the common brake air supply passage (1-a) A-2) respectively disposed on the front side (I) of the valve body (1) and the top surface of the valve body (1), the air outlet of the common brake air supply passage (1-a-3) ) is placed on the right side (II) of the valve body (1).
8. The anti-stacking valve according to claim 1, wherein said parking brake air supply passage (1-b) is provided with at least one air inlet; said at least one air inlet is disposed at said valve body Side or bottom.
9. The anti-stacking valve according to claim 8, wherein a first intake port (1-b-1) and a second intake port (1-b-2) capable of opening or closing are provided; and One of them is on and the other is off.
10. The anti-stacking valve according to claim 9, wherein:

    a first intake port (1-b-1) of the parking brake air supply passage (1-b) is disposed at a bottom surface of the valve body (1); the parking brake air supply passage (1) The second intake port (1-b-2) of -b) is disposed on the side of the valve body (1).
11. The anti-stacking valve according to claim 10, wherein said parking brake air supply passage (1-b) includes a first section that communicates with said first intake port (1-b-1) ( 1-b-4), And a second section (1-b-5) communicating with the second intake port (1-b-2), the first section including a second bottom provided on a bottom surface of the valve body (1) The second section includes a third transverse hole disposed at a side of the valve body; wherein the intersection of the third horizontal hole and the second bottom hole forms a bend.
12. The anti-stacking valve according to claim 11, wherein the first intake port (1-b-1) and the second intake port of the parking brake air supply passage (1-b) -b-2) is placed on the bottom surface of the valve body (1) and the front side (I) of the valve body (1), and the air outlet of the parking brake air supply extension (1-b-0) (1- B-3) is placed on the right side (II) of the valve body (1).
13. The anti-stacking valve according to any one of claims 1 to 12, characterized in that the slider chamber (1-c) is respectively associated with the common brake air supply passage on both sides extending in the longitudinal direction thereof (1) -a) is in communication with the parking brake air supply passage (1-b).
14. The anti-superimposition valve of the rail vehicle base brake device according to any one of claims 1 to 12, characterized in that: the bottom of the valve body (1) is provided with a long hole in a longitudinal direction; the long hole is close to the a portion in the middle of the valve body (1) forms the slider chamber (1-c), and a portion of the elongated hole near the bottom of the valve body (1) forms a first bottom hole (1-d), and The parking brake air supply passage (1-b) is connected; further comprising a column block (1-2), the column block (1-2) penetrating into the first bottom hole (1-d) and passing through The parking brake air supply passage (1-b).
15. The anti-stacking valve for a rail vehicle base brake device according to any one of claims 1 to 12, wherein the slider (2) includes a slider body and a sealing member, and the sealing member is mounted on the On the slider body and for providing a seal with the end of the slider cavity or the inner circumferential surface.
16. The anti-stacking valve of the rail vehicle base brake device according to claim 15, wherein the slider body is a hollow metal cylinder, and the sealing member is an elastic body; wherein the elastic body is embedded in In the hollow metal cylinder, both ends of the elastic body protrude from the hollow metal cylinder.
17. The anti-stacking valve of the rail vehicle base brake device according to claim 15, wherein the slider body is a metal cylinder, and the sealing member is an elastic mat; wherein the elastic body is disposed in the On both end faces of the metal cylinder.
18. The anti-stacking valve of the rail vehicle base brake device according to claim 15, The slider body is a metal cylinder, and the sealing component is an elastic ring; wherein the metal cylinder is sleeved around the outer circumference of the metal cylinder.
19. The anti-stacking valve of the rail vehicle base brake device according to claim 15, wherein the slider body is a metal cylinder having a plurality of annular grooves on the outer circumference, and the sealing member comprises a plurality of elastic rings; A plurality of the elastic rings are respectively pressed into a plurality of the annular grooves.
20. A brake cylinder assembly for vehicle braking, comprising: a brake cylinder block (10) and an anti-stacking valve (20) according to any one of claims 1 to 19; The cylinder block (10) is separated from the inner body by the intermediate body (10-3), and forms a common brake cylinder block (10-1) and a parking brake cylinder block (10-2) on both sides. The common brake cylinder block (10-1) and the parking brake cylinder block (10-2) respectively form a common brake cylinder piston chamber and parking with the intermediate body (10-3); a brake cylinder piston chamber; the anti-superimposition valve (20) communicates with the common brake cylinder piston chamber through the common brake air supply passage (1-a), and through the brake air supply extension passage and The parking brake cylinder piston chamber is in communication.
21. A brake cylinder assembly according to claim 20, wherein

    A platform (10-4) is disposed on an outer side of the brake cylinder block (10), and a common brake cylinder connected to the piston chamber of the common brake cylinder is respectively disposed on the platform (10-4). a port (10-a) and a parking brake cylinder intake port (10-b) communicating with the parking brake cylinder piston chamber; the anti-superposition valve (20) is disposed on the platform (10- 4) upper, which communicates with the common brake cylinder intake port (10-a) through a common brake air supply passage (1-a), and through the brake air supply extension passage and the parking system The cylinder inlet (10-b) is connected.
22. A control method for vehicle braking, characterized in that:

    When the vehicle does not need to brake, the compressed gas enters the slider cavity through the parking brake air supply passage; the slider is moved up to the first end portion to block the common brake air supply passage; The brake air supply passage is in communication with the brake air supply extension passage, and the common brake air supply passage is isolated from the brake air supply extension passage; the compressed gas enters the parking brake cylinder piston through the brake air supply extension passage a cavity and storing energy in the piston chamber of the parking brake cylinder; and/or

    When the vehicle performs the usual braking step, the compressed gas enters the air outlet of the common brake air supply passage via the common brake air supply passage, and enters the common brake cylinder piston chamber to provide braking force; The compressed gas pressure in the vehicle brake air supply passage is greater than the common brake air supply The compressed gas pressure in the channel, the slider is held at the first end and blocks the common brake air supply passage; the parking brake air supply passage is connected with the brake air supply extension passage, and the common brake supply The air passage is isolated from the brake air supply extension, and the compressed gas continues to store energy in the piston chamber of the parking brake cylinder; and/or

    When the vehicle performs the parking brake step, the common brake cylinder and the compressed gas in the piston chamber of the parking brake cylinder are sequentially discharged, and the energy stored in the piston chamber of the parking brake cylinder is released. Parking brake, at this time the slider moves to the second end and blocks the parking brake air supply.
23. A control method for vehicle braking, characterized in that:

    When the parking brake step of the vehicle is executed when the common braking step has not been completed, the compressed gas in the piston chamber of the parking brake cylinder is released in advance, and the air pressure in the piston chamber of the parking brake cylinder is smaller than that of the common brake cylinder. The air pressure in the piston chamber moves the slider downward to the second end portion and blocks the parking brake air supply passage, and the common brake air supply passage communicates with the brake air supply extension passage, and the parking brake The air supply passage is isolated from the brake air supply extension passage, and the energy is stored in the piston chamber of the parking brake cylinder to release the parking brake.

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