STR relay valve

Abstract

The utility model discloses an STR relay valve, relates to relay valve technical field, including upper casing, relay piston and lower casing, the inside of said upper casing is provided with relay piston, and the side wall of relay piston is provided with first O-shaped seal ring, one side of said upper casing is provided with control air port, and the other side is provided with second O-shaped seal ring. A lower shell is fixedly arranged below the upper shell through a bolt, a second O-shaped sealing ring attached to the inner wall of the upper shell is arranged on the outer wall of the lower shell, an air inlet valve assembly is arranged in the lower shell, a spring seat is installed on one side of the air inlet valve assembly, a return spring is arranged in the spring seat, and the air inlet valve assembly is connected with the return spring. According to the device, the glass fiber reinforced plastic is additionally arranged on the outer wall of the upper shell, so that the device not only has the properties of hardness, high temperature resistance and corrosion resistance of glass, but also has the function of being hard and not broken like steel, and the device has the advantages of wear resistance and corrosion resistance by coating the outer wall of the glass fiber reinforced plastic with the macromolecular ceramic polymer coating.

Description

TECHNICAL FIELD

[0001] The utility model relates to relay valve technical field, concretely is a kind of STR relay valve. BACKGROUND

[0002] Relay valve is part of automobile air brake system, in the braking system of truck, relay valve plays the role of shortening reaction time and pressure establishment time, relay valve inlet is connected with air reservoir, and outlet is connected with brake chamber.When stepping on brake pedal, the output air pressure of brake valve is input as control pressure of relay valve, under the action of control pressure, it will push away, then compressed air directly enters brake chamber through inlet from air reservoir, without flowing through brake valve, which greatly shortens the charging pipeline of brake chamber, accelerates the charging process of chamber.Therefore, relay valve is also called acceleration valve.

[0003] However, the existing STR relay valve has the following problems in the process of use: the conventional relay valve is used, the air supply of air brake valve is small, and the installation position is far away from each axle, so that only relying on air supply will inevitably lead to slow response of each force pump, and the strength requirement is higher in the process of increasing and releasing pressure, the existing valve body is low in strength, thereby affecting service life. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of STR relay valve to solve the relevant problems in the above background.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of STR relay valve, including upper shell, relay piston and lower shell, the inside of the upper shell is provided with relay piston, and the side wall of relay piston is provided with first O-shaped sealing ring, the side of the upper shell is provided with control gas opening, the lower of the upper shell is provided with lower shell by bolt fixed, and the outer wall of lower shell is provided with the second O-shaped sealing ring that is in line with the inner wall of upper shell, the inside of the lower shell is provided with inlet valve assembly, and the side of inlet valve assembly is installed spring seat, the inside of spring seat is provided with return spring, the side of the lower shell is provided with air inlet, and the inside of air inlet is provided with filter screen, the inside of the lower shell is provided with lower valve seat, and the outer wall of lower valve seat is provided with fourth O-shaped sealing ring, the bottom of lower valve seat is provided with stop ring that is in contact with lower shell, the bottom of inlet valve assembly is provided with third O-shaped sealing ring that is in line with lower valve seat, the lower of lower valve seat is installed exhaust hood, and the bottom of exhaust hood is provided with exhaust port.

[0006] The STR relay valve provided by the technical solution, the outer wall of the upper shell and the lower shell is provided with glass steel, and the glass steel is externally sprayed with wear-resistant paint.

[0007] The STR relay valve provided by the technical scheme has the advantages that the wear-resistant coating is made of a high-molecular ceramic polymer coating.

[0008] The STR relay valve provided by the technical scheme has the advantages that the front wall of the upper shell is provided with a gas outlet, and a three-way connector is arranged in the gas outlet.

[0009] The STR relay valve provided by the technical scheme has the advantages that the outer wall of the lower shell is provided with a nameplate.

[0010] The STR relay valve provided by the technical scheme has the advantages that the bottom end of the gas outlet is provided with a silencer through screwing.

[0011] Compared with the prior art, the STR relay valve provided by the technical scheme has the following advantages.

[0012] 1、The air pressure in the control valve enters the control air port, pushes the relay piston to move downward, and thus opens the valve at the air outlet, opens the air cylinder, and the air pressure in the air cylinder enters the brake chamber through the air outlet, and when the air pressure in the control air port is removed, the relay piston moves up and down under the action of the air pressure, the valve at the air outlet resets, the air outlet is opened, the air pressure in the brake chamber is discharged into the atmosphere through the air outlet, and the structure can be used to shorten the charging and discharging time of the large-capacity brake chamber at the end of the long pipeline, can accelerate and quickly discharge, the air supply of the air brake valve is small, and the installation position is far away from each vehicle axle, so that only the air supply can inevitably lead to slow response of each booster pump, and thus the air in the air cylinder is directly supplied to improve the response speed and shorten the vehicle braking distance.

[0013] 2、The outer wall of the upper shell is additionally provided with glass fiber reinforced plastic, so that the glass fiber reinforced plastic has the hardness, high temperature resistance and corrosion resistance of glass and the hardness and unbreakability of steel, and the high-molecular ceramic polymer coating is coated on the outer wall of the glass fiber reinforced plastic, so that the glass fiber reinforced plastic has the advantages of wear resistance and corrosion resistance.

[0014] 3、The bottom end of the air outlet is provided with a silencer through screwing, so that the air outlet has the advantages of rapid air exhaust, dust prevention and silencing after air exhaust.

[0015] 4、The inner part of the air inlet is provided with a filter screen, so that the filter screen can increase the filtering effect of large particles in the air source, effectively ensure the cleanliness of the valve body and the pipeline, improve the service life of the product, and have the effect of increasing the durability of the product.

[0016] 5. The utility model is provided with an air pressure alarm sensor, which has the effect of rapid inflation and exhaust. The sensor is transmitted to an external host computer, so that it can be known at any time whether the rapid exhaust effect is effectively achieved in the pipeline, and can effectively judge whether the rear cavity gas is completely discharged, so as to achieve the effect of warning and reminder. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the main half-section structure of the utility model;

[0018] Figure 2 This is a left-side structural schematic diagram of the present utility model;

[0019] Figure 3 This is a schematic diagram of the bottom-up structure of the present invention;

[0020] Figure 4 It is a schematic diagram of the main cross-sectional structure of the present utility model.

[0021] In the figure: 1. Upper housing; 2. Relay piston; 3. First O-ring; 4. Inlet valve assembly; 5. Second O-ring; 6. Spring seat; 7. Return spring; 8. Third O-ring; 9. Lower housing; 10. Fourth O-ring; 11. Retaining ring; 12. Lower valve seat; 13. Exhaust hood; 14. Bolt; 15. Inlet port; 16. Control port; 17. Exhaust port; 18. Outlet port; 19. Nameplate; 20. Filter; 21. Muffler; 22. Three-way adapter; 23. Air pressure alarm sensor. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Example 1, as Figures 1-2As shown, the utility model provides a technical solution: an STR relay valve, comprising an upper shell 1, a relay piston 2 and a lower shell 9, the upper shell 1 is provided with a relay piston 2, and the side wall of the relay piston 2 is provided with a first O-ring 3, a control air port 16 is opened on one side of the upper shell 1, the lower shell 9 is fixedly provided with a bolt 14 below the upper shell 1, and the outer wall of the lower shell 9 is provided with a second O-ring 5 that fits with the inner wall of the upper shell 1, the outer walls of the upper shell 1 and the lower shell 9 are provided with glass fiber reinforced plastics, and the outside of the glass fiber reinforced plastics is sprayed with a wear-resistant coating, and the wear-resistant coating adopts a high-molecular ceramic polymer coating. By adding glass fiber reinforced plastics to the outer wall of the upper shell 1, it has the hardness, high-temperature resistance and corrosion resistance of glass, and has the same hard and unbreakable effect as steel, and the high-molecular ceramic polymer coating is coated on the outer wall of the glass fiber reinforced plastics, which has the advantages of wear resistance and corrosion resistance.

[0024] Example 2, as Figures 1-4 As shown, the utility model provides a technical solution: an STR relay valve, comprising an intake valve assembly 4 arranged inside a lower housing 9, and a spring seat 6 is installed on one side of the intake valve assembly 4, a return spring 7 is arranged inside the spring seat 6, an intake port 15 is opened on one side of the lower housing 9, a lower valve seat 12 is arranged inside the lower housing 9, and a fourth O-ring 10 is arranged on the outer wall of the lower valve seat 12, a retaining ring 11 is provided at the bottom end of the lower valve seat 12 in contact with the lower housing 9, a third O-ring 8 is provided at the bottom end of the intake valve assembly 4 in contact with the lower valve seat 12, an exhaust cover 13 is installed below the lower valve seat 12, and the bottom end of the exhaust cover 13 is provided with an exhaust port 17, and the front wall of the upper housing 1 is opened. An air outlet 18 is provided, and a nameplate 19 is provided on the outer wall of the lower shell 9. After the air pressure enters the control air port 16 through the control valve, the relay piston 2 is pushed to move downward, thereby opening the valve at the air outlet 18 and opening the air reservoir. Since the air inlet 15 is connected to the air outlet 18, the air pressure through the air reservoir enters the brake chamber through the air outlet 18. When the air pressure in the control air port 16 is released, the relay piston 2 moves up and down under the action of the air pressure, and the valve at the air outlet 18 returns to its position, then the exhaust port 17 is opened, and the exhaust port 17 is connected to the air outlet 18. The air pressure in the brake chamber will be discharged into the atmosphere through the exhaust port 17. This structure can be used to shorten the filling and deflation time of a large-volume brake chamber located at the end of a longer pipeline, and can accelerate and release it quickly.

[0025] Example 2, as Figures 1-4The utility model provides a technical scheme: a STR relay valve, the front wall of upper casing 1 is equipped with gas outlet 18, and the inside of gas outlet 18 is provided with three -way conversion joint 22, one side of three -way conversion joint 22 is provided with air pressure alarm sensor 23 through thread, and air pressure alarm sensor 23 output end and host computer input end are electrically connected through wire, the bottom of exhaust port 17 is provided with silencer 21 through thread, the exhaust port 17 of lower casing 9 is equipped with silencer 21, so that it has the effect of quick exhaust, and also has the advantages of dustproof and silencing after exhaust. When using, the whole vehicle exhaust sound is small, the advantages of protecting the cleanliness of pipeline, the inside of air inlet 15 is provided with filter screen 20, the effect of increasing the filtration of large particles of gas source is increased, the cleanliness of valve body and pipeline can be effectively ensured, the service life of the product is improved, the effect of increasing the durability of the product is achieved, the air pressure alarm sensor 23 is provided, so that it has the effect of quick inflation and exhaust, the sensor is delivered to the external host computer, and then whether the pipeline effectively reaches the effect of quick exhaust can be known at any time, whether the rear cavity gas is completely discharged can be effectively judged, the effect of warning and reminding is achieved.

[0026] Working principle: first, connect the external power supply, after the air pressure of control valve enters control gas port 16, push the relay piston 2 to move downwards, thereby opening the valve at the gas outlet 18, opening the air cylinder, because the air inlet 15 is connected with the gas outlet 18, the air pressure of the air cylinder enters the brake chamber through the gas outlet 18, when the air pressure of control gas port 16 is removed, the relay piston 2 moves up and down under the action of air pressure, then the valve at the gas outlet 18 resets, then the exhaust port 17 is opened, and the exhaust port 17 is connected with the gas outlet 18, the air pressure in the brake chamber is discharged into the atmosphere through the exhaust port 17, the structure can be used to shorten the inflation and deflation time of the large volume brake chamber located at the end of the long pipeline, and can accelerate and quickly discharge, because the air brake valve has small air supply, and the installation position is far away from each vehicle bridge, so only relying on the air supply will inevitably lead to the slow response of each force pump, therefore the air in the air cylinder is directly supplied to improve the response speed and shorten the braking distance of the vehicle, the exhaust port 17 of lower casing 9 is equipped with silencer 21, so that it has the effect of quick exhaust, and also has the advantages of dustproof and silencing after exhaust. When using, the whole vehicle exhaust sound is small, the advantages of protecting the cleanliness of pipeline, the inside of air inlet 15 is provided with filter screen 20, the effect of increasing the filtration of large particles of gas source is increased, the cleanliness of valve body and pipeline can be effectively ensured, the service life of the product is improved, the effect of increasing the durability of the product is achieved, the air pressure alarm sensor 23 is provided, so that it has the effect of quick inflation and exhaust, the sensor is delivered to the external host computer, and then whether the pipeline effectively reaches the effect of quick exhaust can be known at any time, whether the rear cavity gas is completely discharged can be effectively judged, the effect of warning and reminding is achieved.

[0027] The upper shell 1 is additionally provided with a glass fiber reinforced plastic, so that the upper shell 1 has the hardness, high temperature resistance and corrosion resistance of glass and the hardness and unbreakability of steel, and the glass fiber reinforced plastic is coated with a high polymer ceramic polymer coating, so that the upper shell 1 has the advantages of wear resistance and corrosion resistance.

[0028] Finally, it should be noted that the above content is only used to illustrate the technical solutions of the present application, and is not a limitation on the scope of protection of the present application. Simple modifications or equivalent replacements of the technical solutions of the present application by those skilled in the art do not deviate from the essence and scope of the technical solutions of the present application.

Claims

1. A STR relay valve comprising an upper housing (1), a relay piston (2) and a lower housing (9), characterized in that: The inside of the upper shell (1) is provided with a relay piston (2), and the side wall of the relay piston (2) is provided with a first O-shaped sealing ring (3), one side of the upper shell (1) is provided with a control air port (16), the lower side of the upper shell (1) is fixedly provided with a lower shell (9) through a bolt (14), and the outer wall of the lower shell (9) is provided with a second O-shaped sealing ring (5) which is in close contact with the inner wall of the upper shell (1), the inside of the lower shell (9) is provided with an air inlet valve assembly (4), and one side of the air inlet valve assembly (4) is provided with a spring seat (6), the inside of the spring seat (6) is provided with a return spring (7), one side of the lower shell (9) is provided with an air inlet (15), and the inside of the air inlet (15) is provided with a filter screen (20), the inside of the lower shell (9) is provided with a lower valve seat (12), and the outer wall of the lower valve seat (12) is provided with a fourth O-shaped sealing ring (10), the bottom end of the lower valve seat (12) is provided with a stop ring (11) which is in contact with the lower shell (9), the bottom end of the air inlet valve assembly (4) is provided with a third O-shaped sealing ring (8) which is in close contact with the lower valve seat (12), the lower side of the lower valve seat (12) is provided with an exhaust cover (13), and the bottom end of the exhaust cover (13) is provided with an exhaust port (17).

2. A STR relay valve according to claim 1, characterized in that: The outer walls of the upper shell (1) and the lower shell (9) are provided with glass steel, and the glass steel is externally sprayed with wear-resistant paint.

3. A STR relay valve according to claim 2, characterized in that: The wear-resistant paint is a high-molecular ceramic polymer paint.

4. A STR relay valve according to claim 1, characterized in that: The front wall of the upper shell (1) is provided with an air outlet (18), and the inside of the air outlet (18) is provided with a three-way conversion joint (22), one side of the three-way conversion joint (22) is provided with a gas pressure alarm sensor (23) through threads, and the output end of the gas pressure alarm sensor (23) is electrically connected with the input end of the upper computer through wires.

5. A STR relay valve according to claim 1, characterized in that: The outer wall of the lower shell (9) is provided with a nameplate (19).

6. A STR relay valve according to claim 1, characterized in that: The bottom end of the exhaust port (17) is provided with a silencer (21) through threads.

Images