Sliding valve device and manufacturing method thereof

Abstract

The present invention proposes a sliding valve device, which relates to the technical field of railway vehicle air brakes. It includes a sliding valve seat and a valve sleeve. The sliding valve seat includes a first seal and a seat body. The first seal is sealed to one side of the seat body. A sliding groove is provided on the inner hole wall of the valve sleeve. A second seal is sealed on the bottom surface of the sliding groove. The side of the first seal away from the seat body can fit with the side of the second seal. A first valve port group is provided on the first seal, and a second valve port group corresponding to the first valve port group is provided on the second seal. An air path group is provided inside the seat body, and the first valve port group and the air path group are connected. The first seal and the second seal are both made of high-strength and wear-resistant materials. Since the first seal and the second seal are hard and have excellent wear resistance, foreign matter is not likely to cause wear to the first seal and the second seal, thereby ensuring the sealing between the first seal and the second seal, and increasing the service life of the sliding valve device by more than ten times.

Description

Technical Field

[0001] The present invention relates to the technical field of railway vehicle air brake technology, and in particular to a slide valve device and a manufacturing method thereof. Background Art

[0002] Air control valves are a crucial component of railway vehicle air brakes, performing crucial functions such as inflation, release, partial pressure reduction, braking, and pressure maintenance. Typical air control valves used in railway vehicle air brakes (such as the Type 104 and Type 120 air control valves) primarily consist of an intermediate body, a main valve, and an emergency valve. The main valve primarily comprises a main piston, a sliding valve assembly, a control valve, and a main valve body. The main piston, installed within the main valve body, includes a pressure plate, a main piston diaphragm, seals, and a main piston rod.

[0003] The spool valve assembly comprises a spool seat, a spool spring, and a spool valve. The spool valve is pressed against the spool seat by the spool spring and integrally mounted between upper and lower shoulders on the main piston rod. Three rows of valve ports are arranged along one side of the spool seat, left and right. The right row of ports, from top to bottom, comprises the valve seat charging hole and the valve seat partial pressure chamber inlet. The middle row of ports, from top to bottom, comprises the valve seat air port and the valve seat brake port. The left row of ports, from top to bottom, comprises the valve seat partial pressure valve inlet and the valve seat partial pressure valve port. Correspondingly, three rows of valve ports are arranged on the bottom surface of the spool valve (i.e., the surface that contacts the spool seat). The right row of ports, from top to bottom, comprises the charging hole and the partial pressure chamber inlet. The middle row of ports, from top to bottom, comprises the relief liaison groove and the brake port. The left row of ports, from top to bottom, comprises the partial pressure valve inlet, the partial pressure valve port, and the partial pressure valve port. During use, the brake pipe is inflated or exhausted at a certain rate and in a certain amount, so that the main piston moves downward or upward due to the pressure difference on both sides, and moves the control valve relative to the slide valve to connect or cut off the relevant passages on the back of the slide valve, and moves the slide valve relative to the slide valve seat to connect or cut off the relevant passages between the bottom surface of the slide valve and the slide valve seat, thereby producing the effects of inflation, relief, local reduction, braking and pressure maintenance.

[0004] Based on the operating principle of the sliding valve assembly, the seal between the sliding valve seat and the bottom surface of the sliding valve plays a decisive role in the performance of the sliding valve assembly. Once the mating surface is worn, it will lead to uncontrolled communication between the different valve ports on the sliding valve bottom surface and the sliding valve seat, as well as between the valve ports on the sliding valve seat and the sliding valve bottom surface and the sliding valve chamber. The current consensus in the field regarding the primary cause of mating surface wear is foreign matter intrusion. Although, in order to prevent wear on the mating surface between the sliding valve seat and the bottom surface of the sliding valve, the existing technology adopts the method of adding an air filter device to block the entry of foreign matter, however, due to the influence of different regional climate conditions and the invasion of air compressor grease, which forms grease through expansion and cooling, the grease, dust in the air, and rust in the brake pipe and brake container can also enter the mating surface between the sliding valve bottom surface and the sliding valve seat, thereby wearing out the mating surface of the two after repeated relative sliding between the sliding valve bottom surface and the sliding valve seat.

[0005] In addition, the existing sliding valve seat is an integrated design. The traditional integrated design makes its production process complicated and requires high precision, resulting in high production costs and time costs. Summary of the Invention

[0006] The object of the present invention is to provide a sliding valve device that can solve the technical problems mentioned in the above background technology.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0008] A sliding valve device includes a sliding valve seat and a valve sleeve, wherein the sliding valve seat includes a first sealing member and a seat body, and the first sealing member is sealingly connected to one side of the seat body;

[0009] A sliding groove is provided on the inner hole wall of the valve sleeve, and a second sealing member is sealed on the bottom surface of the sliding groove. The side of the first sealing member away from the seat body can be in contact with the side surface of the second sealing member. A first valve port group is provided on the first sealing member, and a second valve port group corresponding to the first valve port group is provided on the second sealing member. The first sealing member and the second sealing member are slidably connected.

[0010] An air path group is provided on the seat body, and the first valve port group is connected to the air path group; the air path group includes a groove group provided on the side surface where the seat body is connected to the first sealing member, and a through hole group provided along the height of the seat body.

[0011] Furthermore, the first valve port group includes a train management bureau reduction hole, an air inlet hole, a resistance adjustment groove, a first through hole, a relief communication groove, a backflow hole, a first inflation hole, a second inflation hole, a second through hole and a third through hole;

[0012] The depth of the resistance adjustment groove and the relief communication groove is less than the thickness of the first seal, and the train management bureau reduction hole, air duct hole, first through hole, counterflow hole, first inflation hole, second inflation hole, second through hole and third through hole all pass through the first seal.

[0013] Further, the groove group includes a first groove, a second groove, a third groove, a fourth groove, a fifth groove and a sixth groove;

[0014] The through hole group includes a first through hole, a second through hole, a third through hole, a fourth through hole and a fifth through hole;

[0015] The second groove is communicated with the second through hole, the third groove is communicated with the first through hole, the fourth groove is communicated with the third through hole, the fifth groove is communicated with the fourth through hole, and the sixth groove is communicated with the fifth through hole.

[0016] Furthermore, when the first seal is installed in place on the seat body, the train management bureau reduction hole and the air inlet hole are connected through the first groove, the first through hole is connected to the third groove, the counterflow hole and the third through hole are both connected to the sixth groove, the first inflation hole and the second inflation hole are connected to the fourth groove, and the second through hole is connected to the fifth groove.

[0017] Furthermore, a third sealing member is provided on a side of the seat away from the first sealing member, and a relief hole communicating with the gas path assembly is formed on the third sealing member;

[0018] Furthermore, the first sealing member, the second sealing member and the third sealing member are made of ceramic, titanium alloy or diamond.

[0019] Furthermore, the first seal and the second seal are both made of high-strength and wear-resistant materials to adapt to the sealing and sliding connection between the first seal and the second seal; the contact surface of the first seal and the second seal is formed by the high-strength and wear-resistant material.

[0020] The present invention also provides a method for manufacturing a sliding valve device, comprising:

[0021] Cutting the metal block to obtain a seat body; slotting the side of the seat body connected to the first sealing member to obtain a groove group; drilling along the height direction of the seat body to obtain a through hole group, and the groove group and the through hole group together form an air path group;

[0022] Cutting a solid high-strength wear-resistant material to obtain a first seal and a second seal, and providing a first valve port group on the first seal, and providing a second valve port group on the second seal; polishing and metallizing the surfaces of the first seal and the second seal;

[0023] The first sealing member is sealingly installed on the side of the seat body where the groove group is opened to obtain a sliding valve seat; the second sealing member is sealingly installed on the bottom of the sliding groove.

[0024] Furthermore, the surface roughness parameter value of both sides where the first seal and the second seal are in contact is 0.05-0.1um; the surface roughness parameter value of the side where the first seal is connected to the seat body and the side where the second seal is connected to the slide groove is 0.3-0.5um.

[0025] Furthermore, the thickness of the surface metallization of the first sealing member and the second sealing member is 1-2 μm.

[0026] Furthermore, the first sealing member has a width of 26-27 mm, a length of 80-82 mm, and a thickness of 4-5 mm.

[0027] Compared with the prior art, the embodiments of the present invention have at least the following advantages or beneficial effects:

[0028] 1. The present invention provides a sliding valve device with a first seal disposed at the bottom of the seat body and a second seal disposed at the bottom of the slide groove. Both the first and second seals are made of high-strength, wear-resistant materials. During use, due to the high hardness and excellent wear resistance of the first and second seals, even if foreign matter intrudes between the first and second seals, it is unlikely to cause wear, thereby ensuring a tight seal between the first and second seals and increasing the service life of the sliding valve device by more than tenfold.

[0029] 2. This invention provides a method for manufacturing a sliding valve assembly. This method separates an existing integrated sliding valve seat into two parts: a seat body and a first sealing member, which are sealed together by welding. This structure replaces internal hole machining with flat surface grooving during gas circuit assembly creation. This allows for the application of established flat surface grooving technology for processing and testing, reducing the precision requirements and manufacturing difficulty of gas circuit assembly creation, improving the yield rate of the sliding valve seat, and lowering production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 A schematic structural diagram of a slide valve device provided by the present invention;

[0032] Figure 2 A schematic structural diagram of the sliding valve seat provided by the present invention;

[0033] Figure 3A schematic structural diagram of the seat provided by the present invention;

[0034] Figure 4 A schematic structural diagram of a first sealing member provided by the present invention;

[0035] Figure 5 A schematic structural diagram of the valve sleeve provided by the present invention;

[0036] Figure 6 A schematic diagram of the internal structure of a sliding valve device provided in another embodiment of the present invention.

[0037] Icons: 100-sliding valve seat; 110-first sealing element; 111-train administration reduction hole; 112-air duct hole; 113-resistance adjustment groove; 114-first through hole; 115-relief communication groove; 116-backflow hole; 117-first inflation hole; 118-second inflation hole; 119-second through hole; 121-third through hole; 130-seat body; 131-first groove; 132-second groove; 133-third groove; 134-fourth groove; 135-fifth groove; 136-sixth groove; 137-first through hole; 138-second through hole; 139-third through hole; 140-fourth through hole; 141-fifth through hole; 142-third sealing element; 143-first connecting piece; 145-second connecting piece; 200-valve sleeve; 201-slide groove; 210-second sealing element. DETAILED DESCRIPTION

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0040] Please refer to Figures 1 to 5A sliding valve assembly, comprising a sliding valve seat 100 and a valve sleeve 200, is suitable for use with existing 120-type air control units. The sliding valve seat 100 includes a first sealing member 110 and a seat body 130. The first sealing member 110 is sealed to one side of the seat body 130. In this embodiment, the connection is achieved through brazing, ensuring a strong and airtight connection between the first sealing member 110 and the seat body 130. A first valve port assembly is provided on the first sealing member 110, and an air path assembly is provided within the seat body 130, connecting the first valve port assembly and the air path assembly.

[0041] A chute 201 is defined within the inner wall of the valve sleeve 200. A delivery pipeline is housed within the valve sleeve 200, one end of which extends to the bottom of the chute 201. A second sealing member 210 is sealed against the bottom of the chute 201, and the second sealing member 210 and the groove surface of the chute 201 are also brazed together. A second valve port group is formed through the second sealing member 210, communicating with the delivery pipeline and corresponding to the first valve port group.

[0042] When the sliding valve seat 100 is properly installed on the valve sleeve 200, the bottom of the sliding valve seat 100 is located within the slide groove 201. The slide groove 201 limits the sliding valve seat 100, and the sliding valve seat 100 can only move along the length of the slide groove 201. At this time, the first sealing member 110 and the second sealing member 210 are in contact. By sliding the sliding valve seat 100, the first valve port group and the second valve port group can be aligned or offset, thereby controlling the air path connection by the relative position relationship of the two different valve port groups. It should be noted that the first sealing member 110 and the second sealing member 210 only need to ensure contact, and the contact surface between the two can be flat or curved.

[0043] Both the first seal 110 and the second seal 210 are made of a high-strength, wear-resistant material, such as ceramic, titanium alloy, and diamond. In this embodiment, the first and second seals 110 and 210 are made of ceramic. The physical properties of ceramic meet the manufacturing requirements of the first and second seals 110 and 210. Furthermore, ceramic is less expensive than titanium alloy and diamond, significantly reducing the manufacturing cost of the sliding valve assembly. Furthermore, this provides better coordination between the first and second valve port groups.

[0044] The slide valve is a key component of the main valve on freight trains. Due to its self-sealing and easy-to-process maintenance requirements, the industry currently generally chooses brass as the main material for its manufacturing. Although brass has good self-sealing properties and is easy to process, fine particles from poorly filtered outside air can enter the slide valve's friction surface with the air, severely damaging the brass surface. The relative movement of dust and the slide valve's friction surface can cause a scratch on the brass surface, ultimately leading to slide valve damage, leakage, and brake failure. This patent uses ceramic as the working surface for both friction surfaces of the slide valve, as ceramic's strength is second only to diamond. Even if dust enters the friction surface, it cannot damage it. Instead, it is ground into finer dust by the ceramic and ultimately carried out of the slide valve through the air.

[0045] Furthermore, freight trains are often parked outdoors for extended periods, subject to significant temperature fluctuations across China, with temperatures dropping as low as -50°C. Furthermore, due to the need for thawing, the cargo often requires thawing, leading to operating temperatures as high as 180°C. Brass has a thermal expansion coefficient of 19.8*10-6 / °C, which can cause deformation of the sealing surface and leakage. Therefore, when selecting materials for the first and second seals 110 and 210, attention should also be paid to the thermal expansion and contraction coefficients of the materials, preferably materials with low thermal expansion and contraction coefficients. The lower the thermal expansion and contraction coefficients of the first and second seals 110 and 210, the wider their applicability, allowing them to be used regardless of time of day, even in extremely cold regions such as western and northern my country. The ceramic used in this patent has a thermal expansion coefficient of approximately 6.5*10-6 / °C, one-third that of brass, effectively mitigating leakage caused by temperature fluctuations.

[0046] In this embodiment, the first valve port group includes a train management reduction hole 111, an air bleed hole 112, a resistance adjustment groove 113, a first through hole 114, a relief communication groove 115, a backflow hole 116, a first inflation hole 117, a second inflation hole 118, a second through hole 119, and a third through hole 121. The depth of the resistance adjustment groove 113 and the relief communication groove 115 is less than the thickness of the first sealing member 110. The train management reduction hole 111, the air bleed hole 112, the first through hole 114, the backflow hole 116, the first inflation hole 117, the second inflation hole 118, the second through hole 119, and the third through hole 121 all pass through the first sealing member 110. The position of the first valve port group is identical to that of the first valve port group provided on the existing 120-type sliding valve device, and the structure is identical. The structure of the seat body 130 is identical to that of the existing sliding valve seat. Therefore, the sliding valve seat 100 provided in this embodiment can be adapted for use in existing air control valves as long as the overall height of the seat body 130 and the first sealing member 110 is equal to the height of the existing sliding valve seat.

[0047] In another embodiment, the position of the gas circuit assembly is also optimized. The gas circuit assembly includes a groove assembly formed on the side surface of the base body 130 connected to the first sealing member 110 and a through hole assembly formed along the height of the base body 130 .

[0048] The groove group includes a first groove 131 , a second groove 132 , a third groove 133 , a fourth groove 134 , a fifth groove 135 and a sixth groove 136 .

[0049] The through-hole group includes a first through-hole 137 , a second through-hole 138 , a third through-hole 139 , a fourth through-hole 140 and a fifth through-hole 141 .

[0050] When the first seal 110 is installed in place on the base 130, the first seal 110 and the base 130 jointly seal the first groove 131, the second groove 132, the third groove 133, the fourth groove 134, the fifth groove 135, and the sixth groove 136, so that the above-mentioned grooves form a pipeline. At this time, the train management bureau reduction hole 111 and the air duct hole 112 are connected through the first groove 131. The first through-hole 114 is connected to the third groove 133 and is connected to the first through-hole 137 through the third groove 133. The backflow hole 116 and the third through-hole 121 are both connected to the sixth groove 136 and are connected to the fifth through-hole 141 through the sixth groove 136. The first inflation hole 117 and the second inflation hole 118 are both connected to the fourth groove 134 and are connected to the third through-hole 139 through the fourth groove 134. The second through-hole 119 is connected to the fifth groove 135 and is connected to the fourth through-hole 140 through the fifth groove 135.

[0051] In this embodiment, by setting the opening position of the air circuit group at the bottom of the seat body 130, the inner hole processing is changed to grooving on the plane, and the existing mature plane grooving technology can be applied for processing and testing, which reduces the accuracy requirements and manufacturing difficulty of the air circuit group opening, makes the manufacturing process of the sliding valve device simpler, and reduces the manufacturing cost.

[0052] Furthermore, since the side of the seat body 130 away from the first seal 110 needs to be in close contact with the control valve during operation, in order to prevent foreign matter from entering between the control valve and the seat body 130 during sliding, causing the seal between the control valve and the seat body 130 to fail, a third seal 142 is provided on the side of the seat body 130 away from the first seal 110. The third seal 142 is provided with a relief hole that communicates with the air circuit assembly. Specifically, a mounting groove is provided on the side of the seat body 130 away from the first seal 110, and the third seal 142 is placed in the mounting groove and connected to the seat body 130 by brazing. The material of the third seal 142 is the same as that of the first seal 110. By ensuring that the third seal 142 is in close contact with the control valve, seal failure caused by wear of the seat body 130 is avoided. Of course, the control valve can also be made of a high-strength, wear-resistant material.

[0053] In another embodiment, please refer to Figure 6 The sliding valve device provided in this application also includes a first connecting member 143 and a second connecting member 145. The first connecting member 143 and the second connecting member 145 are both plate-shaped structures and are both made of oxygen-free copper. The structure of the first connecting member 143 is the same as that of the third sealing member 142. The first connecting member 143 is located between the third sealing member 142 and the seat body 130. The first connecting member 143, the third sealing member 142 and the seat body 130 are all sealed and connected by a brazing process. The second connecting member 145 is located between the first sealing member 110 and the seat body 130. The second connecting member 145, the first sealing member 110 and the seat body 130 are also sealed and connected by a brazing process. A first valve port group is also provided on the second connecting member 145, and corresponds to the first valve port group provided on the first sealing member 110.

[0054] Because the expansion coefficients of the first and third sealing members 110 and 142 are low, the material of the seat body 130 should also be a metal with a low expansion coefficient, such as Kovar. However, Kovar is relatively expensive, which increases the cost of the slide valve. Therefore, the seat body 130 of the present application is made of stainless steel. By adding the first and second connecting members 143 and 145, the stress issues associated with the brazing of the first and third sealing members 110 and 142 to the seat body 130 can be resolved.

[0055] Furthermore, due to the special characteristics of the slide valve, the diameter of the connection between the counterflow hole 116 and the sixth groove 136 must be 0.2 mm. High-speed drilling is often used when drilling holes, and diamond tools are generally used due to the high hardness of ceramics. Directly drilling a 0.2 mm diameter hole in the first seal 110 is costly. The existing solution is to drill a 1 mm hole in the ceramic, which can be produced through die casting and sintering, with almost no cost. Conventional high-speed drilling can be used to drill a 0.2 mm diameter hole in the second connector 145, effectively reducing costs.

[0056] The present invention also provides a method for manufacturing a sliding valve device, comprising:

[0057] S100. Use a laser cutter or milling machine, or other processing tool, to cut the metal block into a predetermined shape to form a seat body. Then, use the milling machine to groove the side of the seat body that connects to the first seal to form a groove set. Then, drill holes at specified locations along the height of the seat body to form a through-hole set. Together, the groove set and the through-hole set form an air path set.

[0058] The groove group includes a first groove, a second groove, a third groove, a fourth groove, a fifth groove and a sixth groove. The depth of the above grooves is 2.5-3.5 mm and the width is 2-3 mm.

[0059] The through-hole group includes a first through-hole, a second through-hole, a third through-hole, a fourth through-hole, and a fifth through-hole. The first through-hole is a waist-shaped hole with a semicircular diameter of 3.5-4mm and a center-to-center distance of 6-7mm. The second, third, and fourth through-holes are all circular holes with a diameter of 1.8-2.2mm. The fifth through-hole is also a circular hole with a diameter of 0.7-0.9mm.

[0060] S200. Use laser cutting to obtain a first sealing member and a second sealing member from a solid high-strength wear-resistant material such as ceramics and diamonds, and open a first valve port group on the first sealing member and a second valve port group on the second sealing member.

[0061] The first seal has a width of 26-27 mm, a length of 80-82 mm, and a thickness of 4-5 mm. The specifications of the second seal are consistent with those of the first seal.

[0062] The first valve port group includes a train management reduction hole, an air intake hole, a resistance adjustment groove, a first through hole, a relief connection groove, a backflow hole, a first inflation hole, a second inflation hole, a second through hole and a third through hole. Among them, the train management reduction hole, the air intake hole, the backflow hole, the first inflation hole, the second through hole and the third through hole are divided into two parts: a large hole part and a small hole part. The depth of the multiple large hole parts is 2.8-3.2mm. The train management reduction hole includes two small hole parts, one of which has a diameter of 1-1.2mm and the other has a diameter of 2-2.5mm; the diameter of the small hole part of the air intake hole is 1-1.2mm; the diameter of the small hole part of the backflow hole is 0.2-0.25mm; the diameter of the small hole part of the first inflation hole, the second through hole and the third through hole are all 2-2.5mm.

[0063] The size of the second valve port group is the same as that of the second valve port group on the existing valve sleeve.

[0064] S300. Use a polishing machine to polish the surfaces of the first seal and the second seal. The parameter value of the surface roughness on both sides where the first seal and the second seal are in contact is 0.05-0.1um; the parameter value of the surface roughness on the side where the first seal is connected to the seat body and the side where the second seal is connected to the slide groove is 0.3-0.5um.

[0065] After polishing, the surfaces of the first and second seals are metallized. This involves applying a metallization process such as molybdenum manganese plating, gold plating, copper plating, tin plating, nickel plating, or LAP to adhere a thin metal film approximately 1-2 μm thick. This facilitates the connection between the first seal and the base, and the second seal and the bottom of the chute.

[0066] S400. Braze the first sealing member to the side of the seat body where the groove group is formed, forming the sliding valve seat. Braze the second sealing member to the bottom of the slide groove. During welding, ensure that the first valve port group is connected to the corresponding groove group. The second valve port group should correspond one-to-one with the valve ports on the bottom surface of the slide groove of the existing valve sleeve.

[0067] In other embodiments, a third seal may be provided on the chute seat. The manufacturing and installation methods of the third seal are as follows:

[0068] S500. Use laser cutting to obtain a third seal from solid high-strength wear-resistant materials such as ceramics and diamonds, and open multiple avoidance holes on the third seal. The multiple avoidance holes correspond one-to-one to the first through hole, the second through hole, the third through hole, the fourth through hole and the fifth through hole, and the shape and size of the avoidance holes are the same as the shape and size of the corresponding through holes.

[0069] Performing polishing and metallization on the third seal, with the same processing requirements as the first seal;

[0070] The third seal is installed on the side of the seat away from the first seal by brazing. During installation, it should be noted that the position of the avoidance hole should correspond to the position of the through hole group.

[0071] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A sliding valve device, characterized in that: It includes a sliding valve seat and a valve sleeve, wherein the sliding valve seat includes a first sealing member and a seat body, and the first sealing member is sealed and connected to one side of the seat body; A sliding groove is formed on the inner hole wall of the valve sleeve, and a second sealing member is sealed on the bottom surface of the sliding groove. The side of the first sealing member away from the seat body can be in contact with the side surface of the second sealing member. A first valve port group is formed on the first sealing member, and a second valve port group corresponding to the first valve port group is formed on the second sealing member. The first sealing member and the second sealing member are slidably connected. The seat body is provided with an air path group, the first valve port group is connected to the air path group; the air path group includes a groove group provided on the side surface of the seat body connected to the first sealing member and a through hole group provided along the height of the seat body; It also includes a second connecting piece, which is a plate-shaped structure and is made of oxygen-free copper. The second connecting piece is located between the first sealing piece and the seat body, and the second connecting piece, the first sealing piece and the seat body are sealed together. The second connecting piece is also provided with the first valve port group, which corresponds to the first valve port group provided on the first sealing piece.

2. A sliding valve device according to claim 1, characterized in that: The first valve port group includes a train management bureau reduction hole, an air inlet hole, a resistance adjustment groove, a first through hole, a relief communication groove, a backflow hole, a first inflation hole, a second inflation hole, a second through hole and a third through hole; The depths of the resistance adjustment groove and the relief communication groove are less than the thickness of the first seal, and the train management bureau reduction hole, air duct hole, first through hole, counterflow hole, first inflation hole, second inflation hole, second through hole and third through hole all pass through the first seal.

3. A sliding valve device according to claim 2, characterized in that: The groove group includes a first groove, a second groove, a third groove, a fourth groove, a fifth groove and a sixth groove; The through hole group includes a first through hole, a second through hole, a third through hole, a fourth through hole and a fifth through hole; The second groove is connected to the second through hole, the third groove is connected to the first through hole, the fourth groove is connected to the third through hole, the fifth groove is connected to the fourth through hole, and the sixth groove is connected to the fifth through hole.

4. A sliding valve device according to claim 3, characterized in that: When the first seal is installed in place on the seat body, the train administration reduction hole and the air duct hole are connected through the first groove, the first through hole is connected with the third groove, the counterflow hole and the third through hole are both connected with the sixth groove, the first inflation hole and the second inflation hole are connected with the fourth groove, and the second through hole is connected with the fifth groove.

5. The slide valve device according to claim 1, characterized in that: A third sealing member is provided on a side of the seat body away from the first sealing member, and a avoidance hole communicating with the gas path assembly is formed on the third sealing member.

6. A sliding valve device according to claim 5, characterized in that: The first sealing member, the second sealing member and the third sealing member are made of ceramic, titanium alloy or diamond.

7. A sliding valve device according to claim 1 or 2, characterized in that: The first seal and the second seal are both made of high-strength and wear-resistant materials to adapt to the sealing and sliding connection between the first seal and the second seal; the contact surface of the first seal and the second seal is formed by high-strength and wear-resistant materials.

8. The method for manufacturing a sliding valve device according to any one of claims 1 to 7, wherein: include: Cut the metal block to obtain the seat body; A groove group is formed on the side of the seat body connected to the first sealing member; holes are drilled along the height direction of the seat body to form a through hole group, and the groove group and the through hole group together form an air path group; Cutting a solid high-strength wear-resistant material to obtain a first seal and a second seal, and providing a first valve port group on the first seal, and providing a second valve port group on the second seal; polishing and metallizing the surfaces of the first seal and the second seal; The first sealing member is sealingly mounted on the side of the seat body where the groove group is formed, thereby obtaining a sliding valve seat; Install the second seal tightly on the bottom of the chute.

9. The method for manufacturing a slide valve device according to claim 8, wherein: The parameter value of the surface roughness on both sides where the first seal and the second seal are in contact is 0.05-0.1um; the parameter value of the surface roughness on the side where the first seal is connected to the seat body and the side where the second seal is connected to the slide groove is 0.3-0.5um.

10. The method for manufacturing a slide valve device according to claim 8, wherein: The thickness of the surface metallization of the first sealing member and the second sealing member is 1-2 μm.

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