Railway freight car relief valve tie rod hanging seat device and railway freight car

Abstract

The invention discloses a railway freight car relief valve tie rod hanger device and a railway freight car, comprising: at least one relief valve tie rod, one end of which is used to be connected to the relief valve, at least one tie rod hanger structure, the tie rod hanger structure comprising: a hanger, which is L-shaped, one end of which is connected to the inner groove of the side beam, and the other end is provided with a special-shaped hole, the other end of the relief valve tie rod passes through the special-shaped hole and is exposed, a clamping seat is arranged above the special-shaped hole and is used to provide a force to push the relief valve tie rod downward, and a wear-resistant pad is arranged below the special-shaped hole and is used to support the relief valve tie rod so that it is located in the middle of the special-shaped hole. The railway freight car relief valve tie rod hanger limits the relief valve tie rod through the special-shaped hole on the hanger, and the relief valve tie rod is located in the middle of the special-shaped hole through the clamping seat and the wear-resistant pad, so as to prevent the relief valve tie rod from colliding and wearing with the inner periphery of the special-shaped hole due to shaking during the operation of the vehicle.

Description

Technical Field

[0001] The present invention belongs to the technical field of railway freight car relief valve tie rod hangers, and more specifically, relates to a railway freight car relief valve tie rod hanger seat device and a railway freight car. Background Art

[0002] The 120-type air control valve is the control center of the railway freight car brake system. The release valve lever is the main operating part for manual release in the vehicle air brake system. It is directly connected to the release valve handle of the 120-type air control valve to realize the manual release function of the vehicle. The layout of the release valve lever should not only facilitate the safe operation of the ground staff, but also avoid the poor release phenomenon caused by blockage during operation.

[0003] The layout and design of the existing relief valve tie rod are mainly based on the structure of railway freight cars. They are arranged in the middle of the freight car body structure or at the end of the freight car body structure and fixed by accessories such as the relief valve tie rod hanger. Due to the limitations of the car body structure, most models of railway freight cars such as general open cars, flat cars, box cars, tank cars, etc., have 120 type air control valves (see Figure 1 Serial number 10') is installed on the middle beam in the middle of the vehicle body chassis through its mounting seat (see Figure 1 No. 11') on the lower side (see Figure 1 ), the corresponding long end is inconsistent with the left relief valve pull rod made of 10mm diameter round steel (see Figure 1 , 3 No. 4') and the right relief valve lever (see Figure 1 , 3 The mounting hole of the flat end of the serial number 12') facing the inside of the vehicle is connected to the 120 type air control valve (see Figure 1 No. 10') relief valve handle (see Figure 1 , 3 Middle serial number 8') with split pin (see Figure 1 , 3 After the connection is made, the other ends of the left and right relief valve pull rods facing the outside of the vehicle extend to the side beams on both sides of the vehicle chassis (see Figure 1 To prevent the release valve pull rod from falling off, insert the ends of the release valve pull rod handles on the left and right sides of the vehicle into the L-shaped anti-falling plates (see Figure 1 After the mounting hole below the serial number 3' is opened, the handle is then simmered into a closed trapezoidal structure with a straight side length of 200mm, and its interface is sealed and welded by electric welding, and then two special rivets (see Figure 1 No. 5') and special rivet ring (see Figure 1 No. 6') Install the anti-drop plate (see Figure 1 The two holes above the serial number 3') are welded to the side beam (see Figure 1No. 7') inner mounting base (see Figure 1 , 2 No. 1') on the hanger (see Figure 1 , 2 The two mounting holes set at the bottom of No. 2' are aligned and tightened with special riveting equipment to facilitate the operator to stand on either side of the car body to manually release the railway freight car 120 type air control valve by pushing and pulling the release valve lever handle to ensure that the vehicle braking and release working conditions are good.

[0004] However, the existing relief valve tie rod hanger and other fixed accessories and relief valve tie rods have problems such as deformation, open welding, cracking, wear, falling off and loss, inconvenient maintenance, low manufacturing and repair efficiency and high cost. Figure 1 Abnormal wear of the contact parts (No. 3') not only affects driving safety, but also affects the maintenance cost and efficiency of railway freight cars.

[0005] Due to the serpentine motion of railway freight cars during high-speed operation, the car body generates a violent shaking force. The lateral component of the shaking force in the car body will cause the relief valve pull rod to move toward the mounting hole at the inner end of the car to overcome the gap between the mounting pin hole at the relief valve handle and produce a lateral reciprocating movement for a distance. This reciprocating movement will cause the relief valve pull rod to move toward the handle at the outer end of the car and the L-shaped anti-slip plate (see Figure 1 The vertical mounting long hole set below serial number 3') and the contact part of the anti-detachment plate produce sawing-like movement and friction. As the mileage of railway freight cars continues to increase, the sawing-like movement and friction will cause abnormal wear at the contact part between the relief valve lever handle and the L-shaped anti-detachment plate. The above-mentioned wear also occurs when the relief valve lever handle is manually pulled to perform manual relief operation of the vehicle. If the wear exceeds the limit, the relief valve lever will break and fall off, which may hit railway signals and other facilities. Therefore, the abnormal wear of the relief valve lever not only affects its performance but also poses a potential safety hazard to driving.

[0006] The relevant maintenance regulations for railway freight cars require that the relief valve pull rod must be replaced when its diameter is less than φ7mm. Therefore, the abnormal wear of the relief valve pull rod not only affects the maintenance efficiency of the railway freight car brake device, but also increases the maintenance cost due to the frequent replacement and replenishment of the new relief valve pull rod. In particular, when the L-shaped anti-slip plate and the hanger are connected with special rivets and rings, they need to be completely replaced during maintenance, so the maintenance cost will increase even more. Summary of the invention

[0007] The purpose of the present invention is to provide a railway freight car relief valve tie rod hanger device in view of the deficiencies in the prior art, so as to solve the problem that abnormal wear of the contact part between the relief valve tie rod handle and the L-shaped anti-drop plate not only affects driving safety, but also affects the maintenance cost and maintenance efficiency of railway freight cars.

[0008] In order to achieve the above object, the present invention provides a railway freight car relief valve tie rod hanger device, comprising:

[0009] At least one relief valve tie rod, one end of which is used to connect with the relief valve;

[0010] At least one tie rod hanger structure, the tie rod hanger structure comprising:

[0011] The hanger is L-shaped, one end of which is connected to the inner groove of the side beam, and the other end of which is provided with a special-shaped hole, and the other end of the relief valve pull rod passes through the special-shaped hole and is exposed;

[0012] A pressing seat, arranged above the special-shaped hole, for providing a force to push the pull rod of the relief valve downward;

[0013] A wear-resistant pad is arranged below the special-shaped hole and is used to support the relief valve pull rod so that it is located in the middle of the special-shaped hole.

[0014] Optionally, the other end of the hanger is provided with an oblong hole and a hanging ring in sequence from top to bottom, the hanging ring is located between the oblong hole and the special-shaped hole, and both sides of the oblong hole are connected with positioning pins through positioning pin connecting holes respectively;

[0015] The pressing seat comprises:

[0016] The base comprises a bottom plate and two webs, wherein the two webs are respectively located on both sides of the bottom plate and are in a U-shaped structure, wherein the bottom plate is provided with a second hole-bolt connection hole and two guide holes matched with the positioning pins, wherein the two guide holes are respectively located on both sides of the second hole-bolt connection hole, and the two webs are provided with a second round pin assembly hole;

[0017] A second round pin, both ends of which are rotatably connected to the two second round pin assembly holes, and an outer circumference is sleeved with a second sleeve for slidingly connecting with the relief valve pull rod;

[0018] A second bolt with a hole, the threaded end of which passes through the second bolt hole and the oblong hole in sequence and is exposed, and the exposed end is connected with a third elastic washer and a third nut in sequence;

[0019] A spring has one end connected to the hanging ring and the other end connected to the exposed end of the second eyelet bolt.

[0020] Optionally, the positioning pin includes a head, a positioning portion and a tail portion which are cylindrical and concentrically connected in sequence, the diameters of the head, the positioning portion and the tail portion decrease in sequence, the outer periphery of the positioning portion cooperates with the inner periphery of the guide hole, the outer periphery of one end of the tail portion close to the positioning portion is smooth, and the outer periphery of one end of the tail portion away from the positioning portion is provided with a thread and a cotter pin hole.

[0021] Optionally, the relief valve pull rod includes a Z-shaped rod body, one end of which is provided with a rod head that matches the relief valve, and the other end of which is provided with a handle.

[0022] Optionally, the handle is arranged horizontally, and the rod head is arranged vertically in a ring shape.

[0023] Optionally, the special-shaped hole includes a vertical long waist hole and a horizontal long waist hole, and one end of the vertical long waist hole is connected to the middle of the horizontal long waist hole in a T shape.

[0024] Optionally, it also includes a first bolt with a hole, the wear-resistant pad is upwardly provided with a groove matching the lower end of the special-shaped hole, the lower part of the other end of the hanger is provided with a first bolt connecting hole, the wear-resistant pad is provided with a countersunk hole, the threaded end of the first bolt with a hole passes through the countersunk hole and the first bolt connecting hole in sequence and is exposed, and the exposed end is sequentially provided with a second elastic washer, a second nut and a second cotter pin.

[0025] Optionally, a protective structure is provided in the gap at the other end of the hanger, and the protective structure comprises:

[0026] A protective seat is provided at the lower end of the side beam, and forms an open box structure with the side beam, and the other end of the relief valve tie rod is located in the box structure;

[0027] An elastic pad is arranged at one end of the protection seat away from the relief valve tie rod;

[0028] A process hole passes through the protective seat and the elastic pad, and the handle of the relief valve pull rod can pass through the process hole.

[0029] Optionally, a rib plate is provided between the protective seat and the side beam.

[0030] A railway freight car, comprising:

[0031] A relief valve, the relief valve being arranged on one side of the center line of the railway freight car;

[0032] Two of the above-mentioned railway freight car relief valve tie rod hanging seat devices;

[0033] Two tie rod suspension seat structures are symmetrically arranged on both sides of the railway freight car;

[0034] Two relief valve pull rods, the two relief valve pull rods have different lengths.

[0035] The present invention provides a railway freight car relief valve tie rod hanger device, which has the following beneficial effects:

[0036] 1. The railway freight car relief valve tie rod hanger device limits the relief valve tie rod through the special-shaped hole on the hanger, and the relief valve tie rod is located in the middle of the special-shaped hole through the clamping seat and the wear-resistant pad, so as to prevent the relief valve tie rod from colliding and wearing with the inner periphery of the special-shaped hole due to shaking during the operation of the vehicle.

[0037] 2. The protective seat and the elastic pad connected thereto serve to block and buffer accidental collisions with external forces such as cargo or loaders, and prevent the valve tie rod and its hanger and other accessories from being directly damaged or cracked by the above-mentioned external forces, thereby improving the safety of railway transportation.

[0038] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0040] Figure 1 The present invention shows a structural schematic diagram of a railway freight car relief valve tie rod hanging seat device in the prior art.

[0041] Figure 2 The present invention shows a structural schematic diagram of a hanger of a railway freight car relief valve tie rod hanger device in the prior art.

[0042] Figure 3 A diagram showing a prior art railway freight car relief valve tie rod hanger device Figure 1 Schematic diagram of the A-direction structure.

[0043] DESCRIPTION OF RELATED ART

[0044] 1', base; 2', hanger; 3', anti-drop plate; 4', left relief valve pull rod; 5', special rivet; 6', special rivet ring; 7', side beam in the chassis assembly; 8', relief valve handle; 9', cotter pin; 10', 120 type air control valve; 11', middle beam in the chassis assembly; 12', right relief valve pull rod.

[0045] Figure 4 A schematic structural diagram of a railway freight car relief valve tie rod hanger device according to an embodiment of the present invention is shown.

[0046] Figure 5 A railway freight car relief valve tie rod hanger device according to an embodiment of the present invention is shown. Figure 4 Left view of .

[0047] Figure 6A schematic structural diagram of a railway freight car relief valve tie rod hanging seat device according to an embodiment of the present invention is shown when a relief valve tie rod handle is pulled to perform relief operation.

[0048] Figure 7 A railway freight car relief valve tie rod hanger device according to an embodiment of the present invention is shown. Figure 6 Left view of .

[0049] Figure 8 A schematic structural diagram of a hanger of a railway freight car relief valve tie rod hanger device according to an embodiment of the present invention is shown.

[0050] Fig. 9 A railway freight car relief valve tie rod hanger device according to an embodiment of the present invention is shown. Figure 8 Left view of .

[0051] Fig.10 An expanded view of a hanger of a railway freight car relief valve tie rod hanger seat device according to an embodiment of the present invention is shown.

[0052] Fig.11 A schematic structural diagram of a clamping seat of a railway freight car relief valve tie rod hanging seat device according to an embodiment of the present invention is shown.

[0053] Fig.12 A railway freight car relief valve tie rod hanger device according to an embodiment of the present invention is shown. Fig.11 Left view of .

[0054] Fig.13 A schematic structural diagram of a base of a railway freight car relief valve tie rod hanger device according to an embodiment of the present invention is shown.

[0055] Fig.14 A railway freight car relief valve tie rod hanger device according to an embodiment of the present invention is shown. Fig.13 Left view of .

[0056] Fig.15 A schematic structural diagram of a relief valve tie rod of a relief valve tie rod hanging seat device for a railway freight car according to an embodiment of the present invention is shown.

[0057] Fig.16 A railway freight car relief valve tie rod hanger device according to an embodiment of the present invention is shown. Fig.15 Top view of the .

[0058] Fig.17 A schematic structural diagram of a protective seat of a railway freight car relief valve tie rod hanging seat device according to an embodiment of the present invention is shown.

[0059] Fig.18 A railway freight car relief valve tie rod hanger device according to an embodiment of the present invention is shown. Fig.17 Right view of .

[0060] Fig.19 A schematic structural diagram of an elastic pad of a railway freight car relief valve tie rod hanger device according to an embodiment of the present invention is shown.

[0061] Fig. 20 A schematic structural diagram of a wear-resistant pad of a railway freight car relief valve tie rod hanger device according to an embodiment of the present invention is shown.

[0062] Fig.21 A railway freight car relief valve tie rod hanger device according to an embodiment of the present invention is shown. Fig. 20 Left view of .

[0063] Fig. 22 A schematic structural diagram of a positioning pin of a railway freight car relief valve tie rod hanger device according to an embodiment of the present invention is shown.

[0064] Fig.23 A railway freight car relief valve tie rod hanger device according to an embodiment of the present invention is shown. Figure 4 Schematic diagram of the B-direction structure.

[0065] Description of reference numerals:

[0066] 1. Hanger; 2. Spring; 3. Clamping seat; 4. Wear-resistant pad; 5. Relief valve pull rod; 6. Protective seat; 7. Elastic pad; 8. Special rivet; 9. Special rivet collar; 10. Positioning pin; 11. Positioning sleeve; 12. First elastic washer; 13. First nut; 14. First cotter pin; 15. First bolt with hole; 16. Second elastic washer; 17. Second nut; 18. Second cotter pin; 19. First round pin; 20. First sleeve; 21. First flat washer; 22. Third cotter pin;

[0067] 1.1, upper part; 1.2, middle part; 1.3, oblong hole; 1.4, locating pin connection hole; 1.5, hanging ring; 1.6, special-shaped hole; 1.7, lower part; 1.8, first hole for bolt connection;

[0068] 3.1, base; 3.2, second sleeve; 3.3, second round pin; 3.4, fourth cotter pin; 3.5, second flat washer; 3.6, second bolt with hole; 3.7, third elastic washer; 3.8, third nut;

[0069] 3.1.1, bottom plate; 3.1.2, web plate; 3.1.3, guide hole; 3.1.4, second round pin assembly hole; 3.1.5, second bolt connection hole with hole;

[0070] 5.1, handle; 5.2, shaft; 5.3, head;

[0071] 6.1, seat plate; 6.2, rib plate;

[0072] 7.1. Countersunk hole; 7.2. Process hole;

[0073] 10.1, cap portion; 10.2, positioning portion; 10.3, tail portion; 10.4, cotter pin hole. DETAILED DESCRIPTION

[0074] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0075] like Figure 4-23 As shown, a railway freight car relief valve tie rod hanging seat device comprises:

[0076] At least one relief valve pull rod 5, one end of which is used to connect with the relief valve;

[0077] At least one tie rod hanger structure, the tie rod hanger structure comprising:

[0078] The hanger 1 is L-shaped, one end of which is connected to the inner groove of the side beam, and the other end is provided with a special-shaped hole 1.6, and the other end of the relief valve tie rod 5 passes through the special-shaped hole 1.6 and is exposed;

[0079] The pressing seat 3 is arranged above the special-shaped hole 1.6 and is used to provide a force to push the relief valve pull rod 5 downward;

[0080] The wear-resistant pad 4 is arranged below the special-shaped hole 1.6 and is used to support the relief valve pull rod 5 so that it is located in the middle of the special-shaped hole 1.6.

[0081] Specifically, the relief valve rod 5 is limited by the special-shaped hole 1.6 on the hanger 1, and the relief valve rod 5 is located in the middle of the special-shaped hole 1.6 through the clamping seat 3 and the wear-resistant pad 4 to prevent the relief valve rod 5 from colliding and wearing with the inner periphery of the special-shaped hole due to shaking during the operation of the vehicle. If the wear exceeds the limit, it must be replaced with a new part during maintenance for safety reasons.

[0082] In this embodiment, the other end of the hanger 1 is provided with an oblong hole 1.3 and a hanging ring 1.5 in sequence from top to bottom, the hanging ring 1.5 is located between the oblong hole 1.3 and the special-shaped hole 1.6, and the two sides of the oblong hole 1.3 are connected with positioning pins 10 through positioning pin connecting holes 1.4 respectively;

[0083] The pressing seat 3 comprises:

[0084] The base 3.1 comprises a bottom plate 3.1.1 and two webs 3.1.2, the two webs 3.1.2 are respectively located on both sides of the bottom plate 3.1.1 and are in a U-shaped structure, the bottom plate 3.1.1 is provided with a second hole-bolt connection hole 3.1.5 and two guide holes 3.1.3 matched with the positioning pin 10, the two guide holes 3.1.3 are respectively located on both sides of the second hole-bolt connection hole, and the two webs 3.1.2 are provided with a second round pin assembly hole;

[0085] The second round pin has two ends rotatably connected to the two second round pin assembly holes, and the outer periphery is sleeved with a second sleeve for slidingly connecting with the relief valve pull rod 5;

[0086] The threaded end of the second bolt with a hole first passes through the second bolt hole and is then connected to a third elastic washer and a third nut in sequence, and then the threaded end connected to the third elastic washer and the third nut is exposed through the oblong hole 1.3, and the third elastic washer and the third nut can be partially or completely embedded in the oblong hole 1.3;

[0087] One end of the spring 2 is connected to the hanging ring 1.5, and the other end is connected to the exposed end of the second eyelet bolt.

[0088] Specifically, the hanger 1 is an important component of the relief valve tie rod 5 installation hanger, and is formed into a U-shaped closed structure by bending or pressing a high-strength, atmospheric corrosion-resistant steel plate, and is composed of an upper part 1.1, a middle part 1.2, and a lower part 1.7. In order to minimize the welding workload, reduce welding fume pollution, and avoid the occurrence of shedding caused by welding quality problems, the hanger 1 is formed by bending or pressing an integral steel plate or steel, which minimizes the weld length and welding workload. Fig.10As shown, after the hanger 1 is pressed into a U-shaped part, V-shaped notches are set at the webs on both sides where the upper part 1.1 and the middle part 1.2 meet, and the webs on both sides of the lower part 1.7 are cut off to the bottom plate, and then the V-shaped notch and the bottom plate 1.7 of the lower part are bent inward by 90 degrees, and finally only the four butt welds at the above-mentioned local interfaces are welded; during assembly, the upper opening of the U-shaped hanger 1 faces downward so that its ends are welded to the inner webs of the side beams on both sides of the vehicle body chassis and the lower wing edges to form a box-type structure with sufficient strength and rigidity to ensure the fixation of the hanger 1, the support of the clamping seat 3, the wear-resistant pad 4 and the relief valve pull rod 5 and other accessories; to avoid interference with the arc between the web of the cold-bent press-formed side beam and the lower wing edge, a process chamfer larger than the above-mentioned arc is set at the lower corners of the web on both sides of the end 1.1 of the hanger 1 facing the side beam; a process oblong hole 1.3 and a special-shaped hole through which the relief valve rod 5 passes are arranged from top to bottom on the bottom plate of the middle part 1.2, a locating pin 10 is arranged on both sides of the oblong hole 1.3 to connect the round through hole, and a hanging ring 1.5 for connecting the spring 2 is arranged just above the center of the special-shaped hole; two first holed bolt connection holes 1.8 are symmetrically arranged on the bottom plate of the lower part 1.7 along the transverse center line.

[0089] The process oblong hole 1.3 must have a certain length in the vertical direction so that when the clamping seat 3 moves up and down along the bottom plate of the hanger 1, the second hole bolt 3.6 installed thereon and connected to the spring 2 has space to move. In order to facilitate the second hole bolt 3.6 and nut assembled on the clamping seat 3 to move flexibly up and down, the width of the process oblong hole 1.3 must leave a certain gap with the nut of the second hole bolt 3.6.

[0090] In order to facilitate the installation and positioning of the relief valve pull rod 5 and to enable it to move horizontally a certain distance to the left and right sides along the vertical center of the hanger 1, so as to avoid the relief valve pull rod 5 from getting stuck due to large installation errors of the hanger 1 and affecting the braking and relief performance of the relief valve, a special-shaped hole 1.6 is provided at the lower part of the bottom plate in the middle of the hanger 1 without affecting its strength and rigidity, and a horizontal oblong hole is provided above the hole, so that when the handle 5.1 of the relief valve pull rod 5 is lifted upward by hand, the rod body 5.2 of the relief valve pull rod 5 can be moved to the horizontal oblong hole and can swing left and right, avoiding the jamming caused by the two relief valve pull rods 5 heads 5.3 being assembled in the relief valve handle 8' groove without distinguishing between left and right and the large assembly position error of the hanger 1, so as to facilitate the flexible and labor-saving operation of pulling or pushing the relief valve pull rod 5 handle 5.1, and a vertical oblong hole with a certain length is provided below the hole, and the horizontal width dimension of the oblong hole is larger than the diameter dimension of the relief valve pull rod 5 by 0.5-2mm, which plays a role in guiding the relief valve pull rod 5. In order to facilitate the relief valve rod 5 to slide smoothly from the upper horizontal oblong hole to the lower vertical oblong hole, an arc transition structure is used at the intersection of the two holes. In order to facilitate the flexible operation of the relief valve rod 5 handle 5.1, the diameter of the horizontal oblong hole must be larger than the diameter of the vertical oblong hole.

[0091] The base 3.1 mainly plays the role of pressing the self-locking relief valve tie rod 5 to prevent the relief valve tie rod 5 from jumping up frequently and rubbing against the edge of the special-shaped hole to cause excessive wear. At the same time, the relief valve tie rod 5 increases the friction resistance under the combined action of the second sleeve 3.2 at the bottom of the pressing seat 3 and the support force of the wear-resistant pad 4 assembled at the bottom 1.7 of the hanger 1, which can reduce the frequency of free lateral movement caused by shaking during vehicle operation, thereby reducing the wear of the contact part of the relief valve tie rod 5. In order to reduce the welding workload and avoid the occurrence of welding defects, and at the same time to improve the strength and rigidity, the base 3.1 adopts the steel plate blanking and the overall pressing into a U-shaped structure, which avoids the welding quality defects existing in the existing hanger 1 and the occurrence of smoke and dust gas pollution caused by welding. The base 3.1 is composed of a bottom plate 3.1.1 and a web 3.1.2. When assembled, the U-shaped opening of the base 3.1 faces the outside of the vehicle, and its bottom plate 3.1.1 is closely installed on the bottom plate surface of the hanger 1 facing the outside of the vehicle.

[0092] In order to enable the base 3.1 to move up and down and be guided along the bottom plate of the hanger 1, a guide hole 3.1.3 consisting of two oblong holes is symmetrically arranged along the vertical center line above the bottom plate 3.1.1 of the base 3.1. The guide hole 3.1.3 must have a certain length in the vertical direction and a reasonable guide gap must be left between the width of the guide hole 3.1.3 and the outer diameter of the positioning sleeve 11, so that the bottom plate 3.1.1 of the base 3.1 can be guided and moved up and down along the positioning sleeve 11 assembled at the guide end of the positioning pin 10 that is clamped and fastened on the bottom plate of the hanger 1; a second bolt connection hole 3.1.5 with a hole is arranged at the vertical center line above the bottom plate 3.1.1 of the base 3.1 to facilitate the connection and fastening of the second bolt with a hole 3.6, the third elastic washer 3.7 and the third nut 3.8.

[0093] In order to further facilitate the precise positioning and support of the relief valve tie rod 5 and prevent the rod body 5.2 of the relief valve tie rod 5 from frequently hitting the edge of the movable hole of the relief valve tie rod 5 in the horizontal direction above the special-shaped hole 1.6 on the bottom plate of the hanger 1 due to the shaking of the vehicle during the operation of the vehicle, thereby causing excessive wear, a second round pin assembly hole 3.1.4 is provided at the lower part of the web 3.1.2 on both sides of the base 3.1, so that the second sleeve 3.2 of the relief valve tie rod 5 can be assembled and compressed thereon with the second round pin 3.3, the fourth cotter pin 3.4 and the second flat washer 3.5.

[0094] The second sleeve 3.2 adopts a tubular structure with a certain wall thickness and length, and is assembled in the middle of the second round pin 3.3 corresponding to the assembly hole below the two webs 3.1.2 of the base 3.1, and has certain strength, rigidity and wear resistance. In order to facilitate the support of the relief valve pull rod 5, improve its own wear resistance and enable the relief valve pull rod 5 to move flexibly under the action of the manual or relief valve handle 8' restoring force, the second sleeve 3.2 is made of wear-resistant nylon and other materials with good self-lubrication and wear resistance. The cylindrical structure that can rotate around the second round pin 3.3 is made of a material hardness that is softer than the relief valve pull rod 5 connected and in contact with it, and has the advantages of self-lubrication and good wear resistance, ensuring that the parts in contact with it will not wear out after long-term use. In subsequent maintenance, if the second sleeve 3.2 is worn beyond the limit, it is only necessary to replace the rolling sleeve, which can improve the maintenance efficiency of the vehicle and reduce the maintenance cost. Therefore, the second sleeve 3.2 has the characteristics of good self-lubrication, good wear resistance, long service life, low manufacturing cost and easy replacement.

[0095] The spring 2 is subjected to tensile force and is connected between the cotter pin hole at the end of the second eyelet bolt 3.6 installed on the clamping seat 3 and the hanging ring 1.5 of the hanger 1. It mainly plays the role of overcoming friction and avoiding jamming and rapid reset after the clamping seat 3 moves upward under the action of external force.

[0096] The clamping seat 3 is mainly composed of a base 3.1, a second sleeve 3.2, a second round pin 3.3, a fourth cotter pin 3.4, a second flat washer 3.5, a second bolt with a hole 3.6, a third elastic washer 3.7 and a third nut 3.8. The clamping seat 3 can move upwards for a certain distance on the bottom plate of the hanger 1 under the action of an external force, and after the external force is removed, the second sleeve 3.2 arranged at the bottom of the clamping seat 3 is in the role of clamping the relief valve tie rod 5 under the action of its own weight and the tension of the spring 2, so as to prevent the relief valve tie rod 5 from jumping upwards to the horizontal oblong hole above the special-shaped hole 1.6 on the bottom plate 1.2 of the middle part of the hanger 1 due to shaking during the operation of the vehicle, and the rod body 5.2 of the relief valve tie rod 5 will be worn after contacting the periphery of the special-shaped hole for a long time and frequently. If the wear exceeds the limit, it must be replaced with a new part during maintenance for safety reasons. The purpose of using the second sleeve 3.2 is to reduce the wear and friction resistance of the relief valve tie rod 5. If the relief valve rod 5 has a pulling and pulling interference force, you can grab the relief valve rod 5 handle 5.1 by hand to move the relief valve rod 5 rod body 5.2 to drive the pressing seat 3 and the second sleeve 3.2 in contact with it upward to the horizontal long hole set above the special-shaped hole 1.6 set on the bottom plate of the hanger 1, and then swing the relief valve rod 5 rod body 5.2 left and right to eliminate the interference force and then implement the relief operation of the relief valve. After the operation is completed, release the handle 5.1, and at this time, the relief valve rod 5 will quickly fall to the lower part of the vertical long hole set below the special-shaped hole 1.6 under the action of its own weight, the weight of the pressing seat 3 and the pulling force of the spring 2.

[0097] In this embodiment, the positioning pin 10 includes a cap portion 10.1, a positioning portion 10.2 and a tail portion 10.3 which are cylindrical and concentrically connected in sequence. The diameters of the cap portion 10.1, the positioning portion 10.2 and the tail portion 10.3 decrease in sequence. The outer periphery of the positioning portion cooperates with the inner periphery of the guide hole 3.1.3. The outer periphery of one end of the tail portion 10.3 close to the positioning portion 10.2 is smooth, and the outer periphery of one end of the tail portion 10.3 away from the positioning portion 10.2 is provided with a thread and a cotter pin hole 10.4.

[0098] Specifically, the positioning pin 10 is used in conjunction with the positioning sleeve 11, and mainly serves to connect the clamping seat 3 and the hanger 1 and guide the clamping seat 3 relative to the bottom plate of the hanger 1 in the vertical direction. The positioning pin 10 is mainly composed of a cap 10.1, a positioning portion 10.2 and a tail 10.3. The cap 10.1 adopts a large-diameter cylindrical structure, and mainly serves as a sleeve and connects the clamping seat 3 and the hanger 1. In order to facilitate the use of a special wrench to tighten the positioning pin 10, a hexagonal countersunk hole with a certain depth is set at the center of the outer end of the cap 10.1; the positioning portion 10.2 is a cylindrical step structure with a certain length L4 and an outer diameter φB. One end of the positioning portion 10.2 is connected to the cap 10.1 to clamp the outer side periphery of the guide hole 3.1.3 of the base 3.1 of the clamping seat 3, and the other end of the positioning portion 10.2 is clamped on the outer side periphery of the positioning pin connection hole 1.4 on the bottom plate of the hanger 1. In order to facilitate the vertical flexible movement of the clamping seat 3, the length L4 must be greater than the thickness dimension of the base 3.1 of the clamping seat 3 and leave a reasonable gap. In order to facilitate the positioning sleeve 11 assembled at the outer surface of the positioning part 10.2 of the positioning pin 10 to rotate flexibly in the guide hole 3.1.3 of the base 3.1 of the clamping seat 3 and play a guiding role, the length L4 must be greater than the length dimension of the positioning sleeve 11, and the inner diameter and outer diameter of the positioning sleeve 11 must leave a reasonable gap with the outer diameter φB of the positioning part 10.2 and the width dimension of the guide hole 3.1.3 of the base 3.1 of the clamping seat 3 respectively; the tail 10.3 is an external thread structure with a certain length, and an open pin hole 10.4 is set at its end, which is convenient for using the first elastic washer 12, the first nut 13 and the first open pin 14 to connect it to the positioning pin connecting hole 1.4 at the bottom plate of the hanger 1.

[0099] In this embodiment, the relief valve pull rod 5 comprises a Z-shaped rod body 5.2, one end of which is provided with a rod head matched with the relief valve, and the other end of which is provided with a handle 5.1.

[0100] In this embodiment, the handle 5.1 is arranged horizontally, and the rod head is arranged vertically in a ring shape.

[0101] Specifically, the relief valve rod 5 is composed of a handle 5.1, a rod body 5.2 and a head 5.3. The handle 5.1 is arranged on the tail of the relief valve rod 5. In order to facilitate manual operation and improve the degree of humanization, the handle 5.1 adopts a closed elliptical ring structure and is in a horizontal state. The handle 5.1 is assembled and welded under the vehicle and then inserted from the outside to the inside to be assembled in the corresponding hole of the special shape of the bottom plate of the hanger 1, avoiding the welding defects existing after the electric spot welding of the existing vehicle fasteners and the occurrence of over-electric pitting corrosion accidents caused by improper operation. In addition, the space occupied by the handle 5.1 in the vertical direction is relatively small, which can reduce the length of the protective seat 6 and improve the rigidity of the protective seat 6 compared with the existing vehicle. The relief valve rod 5 of the closed elliptical ring structure handle 5.1 directly penetrates into the long hole of the hanger 1, replacing the existing trapezoidal closed welded handle 5.1 of the relief valve rod 5 and the rivet connection fastening structure adopted by the hanger, which has the advantages of simple assembly and maintenance process, good economy, high efficiency and low cost. In order to prevent the handle 5.1 from falling off the hanger 1, the size of the handle 5.1 is larger than the size of the movable hole of the relief valve pull rod 5 on the hanger 1.

[0102] In order to facilitate production and manufacturing and reduce procurement costs, the relief valve pull rod 5 is still made of existing automotive materials, namely, round steel with a diameter of 10 mm.

[0103] In order to prevent the round hole of the flat head 5.3 of the relief valve tie rod 5 from being excessively worn and falling off, and without affecting the connection functions and the rotation of the head 5.3 of the relief valve tie rod 5, in order to increase the wear resistance of the round hole of the head 5.3, the thickness e of the flat part of the head 5.3 is increased on the existing basis, and at the same time, the inner diameter g of the round hole of the head 5.3 of the relief valve tie rod 5 and the outer diameter f of the head 5.3 are increased accordingly on the existing basis. During assembly, the first sleeve 20 is assembled in the round holes of the flat head 5.3 of the relief valve rod 5 on both sides at the same time, and then the first sleeve 20 is inserted into the groove of the relief valve handle 8', and the position of the first sleeve 20 is adjusted so that its inner hole is aligned with the round holes on both sides of the relief valve handle 8', and finally the first round pin 19, the first flat washer 21 and the third cotter pin 22 are used to hinge the relief valve rod 5 head 5.3 and the relief valve handle 8' into an integrated anti-detachment structure. After assembly, the tail of the cotter pin is split 60°. The first sleeve 20 is made of wear-resistant materials such as nylon, and its material hardness is lower than that of the parts it connects and contacts, and it has the advantage of good wear resistance, ensuring that the parts in contact with it will not wear. In subsequent maintenance, if the wear of the first sleeve 20 exceeds the limit, only the first sleeve 20 needs to be replaced, which improves the maintenance efficiency and reduces the maintenance cost.

[0104] Furthermore, since the type 120 air control valve is arranged on one side of the middle beam of the railway freight car chassis, and the relief valve and its handle 5.1 are installed on the valve, in order to facilitate manual pulling of the relief valve rod 5 on both sides of the car body chassis to operate the relief valve, the relief valve rod 5 still adopts a structure with inconsistent lengths on the left and right and a Z-shaped structure with a certain height difference.

[0105] In this embodiment, the special-shaped hole 1.6 includes a vertical long waist hole and a horizontal long waist hole, and one end of the vertical long waist hole is connected to the middle of the horizontal long waist hole in a T shape.

[0106] In this embodiment, it also includes a first bolt with a hole, and the wear-resistant pad 4 is upwardly provided with a groove matching the lower end of the special-shaped hole 1.6. A first bolt connecting hole is provided on the lower part of the other end of the hanger 1, and the wear-resistant pad 4 is provided with a countersunk hole. The threaded end of the first bolt with a hole passes through the countersunk hole and the first bolt connecting hole in sequence and is exposed, and the exposed end is sequentially provided with a second elastic washer, a second nut and a second cotter pin.

[0107] Specifically, the wear-resistant pad 4 is a rectangular structure and is made of wear-resistant materials such as nylon. For the needs of installation and fastening, two circular through holes with countersunk holes are symmetrically arranged on both sides of its transverse center. It is assembled above the bent edge 1.7 of the lower part of the hanger 1 through a first holed bolt 15, a second elastic washer 16, a second nut 17 and a second cotter pin 18. In order to increase the contact area with the relief valve tie rod 5, reduce the movement frequency of the relief valve tie rod 5 caused by the shaking of the vehicle during vehicle operation, avoid excessive wear of the relief valve tie rod 5 and excessive wear caused by friction between the relief valve tie rod 5 and the edge of the vertical long hole 1.6 of the special-shaped hole in the bottom plate of the hanger 1, a full-length groove is set at the horizontal center above the wear-resistant pad 4, and an arc surface matching the diameter of the relief valve tie rod 5 is adopted at the lower part of the groove, and the arc surface must be higher than the lower edge of the vertical long hole 1.6 of the special-shaped hole 1.6 of the bottom plate of the hanger 1 after assembly. The width L3 of the arcs on both sides of the upper part of the groove must be smaller than the width of the vertical long hole 1.6 of the special-shaped hole 1.6 of the bottom plate of the hanger 1, and the upper and bottom arcs of the groove adopt tangent transition to ensure that when the rod body 5.2 of the relief valve tie rod 5 is in the non-working position after the manual relief operation working position, it automatically slides to and is at the bottom of the groove of the wear-resistant pad 4 under the action of its own weight and the clamping force of the clamping seat 3.

[0108] In this embodiment, a protective structure is provided in the gap at the other end of the hanger 1, and the protective structure includes:

[0109] The protective seat 6 is provided at the lower end of the side beam, and forms an open box structure with the side beam, and the other end of the relief valve tie rod 5 is located in the box structure;

[0110] An elastic pad 7 is arranged at one end of the protection seat 6 away from the relief valve pull rod 5;

[0111] The process hole 7.2 penetrates the protective seat 6 and the elastic pad 7, and the handle 5.1 of the relief valve pull rod 5 can pass through.

[0112] In this embodiment, a rib plate 6.2 is provided between the protection seat 6 and the side beam.

[0113] Specifically, the protective seat 6 is composed of a seat plate 6.1 and a rib plate 6.2, which is arranged under the side beam of the hanger 1 facing the outside of the vehicle chassis, and is welded to the lower plane of the lower wing edge of the side beam. The seat plate 6.1 is made of corrosion-resistant thick-walled steel plate bent or pressed into an integral structure with webs on both sides and folded edges on the lower side, which has certain strength and rigidity. When loading and unloading railway freight cars, the protective seat 6 and the elastic pad 7 connected thereto mainly play the role of blocking and buffering accidental collisions with external forces such as cargo or loaders, preventing the valve tie rod 5 and its hanger 1 and other accessories from being directly damaged or cracked by the above-mentioned external force collision, thereby improving the safety of railway transportation. In order to facilitate the operation of the handle 5.1 of the relief valve rod 5, a horizontal process oblong hole 7.2 with a certain length is set at the center of the seat plate 6.1 of the protective seat 6 and the elastic pad 7 connected thereto, and the process oblong hole 7.2 must have a certain width to ensure that the hand will not be hurt when the relief valve handle 8' is pulled up by hand to a certain distance to the horizontal long hole above the special-shaped hole 1.6 of the bottom plate of the hanger 1. The elastic pad 7 is made of materials such as polyurethane with a certain thickness that is impact-resistant, wear-resistant and has excellent elasticity. In order to facilitate the connection and prevent loosening and falling off, a number of connecting round through holes are set on the base 6.1 of the protective seat 6 and the elastic pad 7, and the special rivet 8 and the special rivet ring 9 with the head facing the outside of the chassis are used for tightening and cold riveting assembly. In order to prevent the above-mentioned external force from hitting the rivet head and improve the appearance quality, the outermost end of the round through hole of the elastic pad 7 facing the outside of the railway truck adopts a countersunk hole 7.1 structure with a certain depth.

[0114] A railway freight car, comprising:

[0115] Relief valve, which is set on the side of the center line of the railway freight car;

[0116] Two of the above-mentioned railway freight car relief valve tie rod hanger devices;

[0117] Two tie rod suspension seat structures are symmetrically arranged on both sides of the railway freight car;

[0118] Two relief valve pull rods 5 have different lengths.

[0119] Specifically, the relief valve rod hanger device of the railway freight car is arranged symmetrically on the left and right sides near the lower inner side of the side beams on both sides of the vehicle body chassis, and the left and right sets of the device are completely the same in structure, size and accessories except that the length of the relief valve rod 5 is different. Each set of the device is mainly composed of a hanger 1, a clamping seat 3, a spring 2, a wear-resistant pad 4, a relief valve rod 5, a protective seat 6, an elastic pad 7, a special rivet 8, a special rivet ring 9, a positioning pin 10, a positioning sleeve 11 and fasteners.

[0120] When operating and pulling the relief valve pull rod 5 on one side, the round pin hinged at the relief valve handle 8' which is commonly connected to the relief valve pull rods 5 on both sides can drive the relief valve pull rod 5 on the other side to move, which will not affect the function of operating the relief valve on either side, and after the manual operation is canceled, the relief valve handle 8' can pull the relief valve pull rods 5 on both sides hingedly connected to it under the action of its reset spring 2 so that the relief valve handle 8' can be quickly reset, which will not affect the vehicle's braking and relief performance.

[0121] Furthermore, when the device of the invention is hit by external forces from the outside of the vehicle such as cargo, loaders and forklifts during loading and unloading, it will first contact the outermost protective seat 6 and elastic pad 7 installed under the chassis side beam. Since the protective seat 6 has a certain strength and rigidity, and the elastic pad 7 has a certain elasticity and buffering effect, it can play a role in blocking and buffering accidental collisions with external forces such as cargo or loaders, thereby avoiding the occurrence of bending, deformation, damage or cracking of the hanger 1 by the relief valve tie rod 5 and its hanger 1 installed on the inner side of the protective seat 6 due to the collision of the above-mentioned external forces, thereby improving the safety of railway transportation. The device of the invention solves the problem that the relief valve tie rod hanger 2' of the existing railway freight car is easily hit by cargo, loaders and forklifts during loading and unloading, causing the relief valve tie rod hanger 2' to be welded, cracked, broken or severely bent and deformed from the welding point, affecting the vehicle's braking relief performance and driving safety.

[0122] b. The hanger 1 is formed into a U-shaped closed structure by bending or pressing the steel plate as a whole, and only four relatively short butt joints at the two bent web interfaces are welded. Compared with the existing hanger 2', the welding workload is reduced, the welding fume pollution is reduced, and the occurrence of falling off caused by welding quality problems is avoided. In addition, the partial welding of the hanger 1 replaces the full welding connection structure of the existing vehicle hanger 2', reducing the probability of open welding, cracking and welding defects at the welding point of the hanger 2'. It solves the problem that the existing relief valve tie rod hanger and the base 1' adopt full welding connection when assembling, which causes a high probability of cracks, open welding and other defects at the welding point due to the large number of welds, affects the strength, and is easy to cause driving safety accidents.

[0123] c The protective seat 6 and the hanger 1 of the invention both adopt an integral corrugated structure of thick-walled steel plates with high strength and resistance to atmospheric corrosion, which improves their corrosion resistance, strength and rigidity, prolongs their service life and maintenance cycle, improves their reliability and safety performance, and reduces maintenance costs. It solves the problem that the existing relief valve rod hanger 2' and base 1' are made of ordinary materials, which cause their strength and rigidity to be insufficient to support the combined force of their cantilever force, the self-gravity of the relief valve rod and the swaying force of the vehicle after corrosion, causing deformation and cracking of the relief valve rod hanger 2' and the base 1'; at the same time, it solves the problem that the existing base 1' and hanger 2' need to be removed after factory repair due to severe corrosion, and new parts need to be added during assembly, affecting the maintenance cost and efficiency.

[0124] d. To facilitate manual operation and improve the degree of humanization, the handle 5.1 of the relief valve rod 5 adopts an elliptical ring-shaped closed structure and is in a horizontal state. After being welded under the vehicle, the handle 5.1 is inserted from the outside to the inside and assembled in the corresponding hole of the special shape of the bottom plate of the hanger 1, avoiding the welding defects existing after the electric spot welding of the existing vehicle fasteners and the occurrence of over-electric pitting accidents caused by improper operation. In addition, the space occupied by the handle 5.1 in the vertical direction is relatively small, which can reduce the length of the protective seat 6 of the invention device compared with the existing vehicle, and improve the rigidity of the protective seat 6. The relief valve rod 5 of the closed elliptical ring structure handle 5.1 directly penetrates into the long hole of the hanger 1, replacing the existing trapezoidal closed welded handle 5.1 of the relief valve rod 5 and the rivet connection fastening structure adopted by the hanger, which has the advantages of simple assembly and maintenance process, good economy, high efficiency and low cost.

[0125] e. Without affecting the connection functions and the rotation of the head 5.3 of the relief valve tie rod 5, by increasing the size of the head 5.3 of the relief valve tie rod 5 and the installation hole, and using wear-resistant sleeves with good self-lubrication and wear resistance to assemble in the round holes of the head 5.3 of the relief valve tie rod 5 on both sides and the corresponding pin holes of the relief valve handle 8' and connected with round pins, washers and cotter pins to form an integrated anti-drop structure, the wear resistance of the head 5.3 is improved, and the occurrence of the relief valve tie rod 5 head 5.3 due to excessive wear and tear is avoided. In subsequent maintenance, if the wear-resistant sleeve is worn beyond the limit, it is only necessary to replace the wear-resistant sleeve, which improves the maintenance efficiency and reduces the maintenance cost. It solves the problem that when the existing relief valve tie rod 5 has a large processing deviation and excessive wear on the head 5.3 of the vehicle, such as when the hanger 1 at the handle 5.1 of the relief valve tie rod 5 is also broken and falls off at the same time, it will cause the relief valve tie rod 5 to fall off and be lost.

[0126] f. To reduce the wear and friction resistance of the relief valve tie rod 5, it is convenient to limit the relief valve tie rod 5, improve its own wear resistance and the relief valve tie rod 5 can be flexibly moved under the action of manual or relief valve handle 8' restoring force. If the relief valve tie rod 5 has a pulling and pulling interference force, you can grab the relief valve tie rod 5 handle 5.1 by hand to drive the relief valve tie rod 5 rod body 5.2 to drive the pressing seat 3 and the second sleeve 3.2 in contact with it to move upward to the horizontal long hole set above the special-shaped hole 1.6 set on the bottom plate of the hanger 1, and then swing the relief valve tie rod 5 rod body 5.2 left and right to eliminate the interference force and then implement the relief operation of the relief valve. After the operation is completed, release the handle 5.1, and at this time, the relief valve tie rod 5 quickly falls to the lower part of the vertical long hole set below the special-shaped hole 1.6 under the action of its own weight, the weight of the pressing seat 3 and the pulling force of the spring 2. The second sleeve 3.2 arranged below the clamping seat 3 is made of a cylindrical structure made of wear-resistant nylon and other materials with good self-lubrication and wear resistance, which can rotate around the second round pin 3.3. Its material hardness is softer than the material of the relief valve pull rod 5 connected and in contact with it, and has the advantages of self-lubrication and good wear resistance, ensuring that the parts in contact with it will not wear out after long-term use. In subsequent maintenance, if the second sleeve 3.2 is worn beyond the limit, it is only necessary to replace the rolling sleeve, which can improve the maintenance efficiency of the vehicle and reduce the maintenance cost. Therefore, the second sleeve 3.2 has the characteristics of good self-lubrication, good wear resistance, long service life, low manufacturing cost and easy replacement.

[0127] When disassembling the relief valve pull rod 5, it is only necessary to remove the cotter pin, flat washer, wear-resistant sleeve and round pin connected to the head 5.3 of the relief valve handle 8', so that the relief valve pull rod 5 can be pulled out from the movable hole of the relief valve pull rod 5 on the outside of the hanger, thereby solving the problem that when dealing with the failure of the left relief valve pull rod 4' and the right relief valve pull rod 12', it is time-consuming and laborious to disassemble the L-shaped anti-drop plate and the relief valve pull rod handle from the hanger as a whole; the invention has the advantages of convenient assembly and maintenance, high efficiency, low cost and good safety, and solves the problem that the existing L-shaped anti-drop plate and the relief valve pull rod hanger are fastened with special rivets, rings or bolts and nuts and then spot welded to prevent them from falling off, which requires special riveting equipment to assemble or spot welding with an electric welder, resulting in on-site It is difficult to disassemble quickly, and it is difficult to saw bolts or pull rivets with a saw blade, which is labor-intensive. Disassembly is time-consuming and labor-intensive, and the processing cycle is long. It is difficult to complete within the technical inspection time, which affects the timely processing of faults such as excessive wear of the valve tie rod. There are not only many parts, many manufacturing and maintenance processes, high costs and low efficiency, but also safety hazards and inconvenience in handling temporary faults. At the same time, it also solves the problem that other disassembly tools used in existing structures are inconvenient to carry, and are restricted by factors such as space and sparks during processing, which poses certain safety hazards. The mismatch of on-site maintenance tools increases the difficulty of processing, and to a certain extent also restricts the enthusiasm for on-site processing of faulty vehicles, which is not conducive to improving the overall operating quality of vehicles;

[0128] The wear-resistant pad 4 with a groove on the upper part is adopted to increase the contact area with the relief valve pull rod 5. The arc surface at the lower part of the groove is higher than the lower side of the vertical long hole of the special-shaped hole in the bottom plate of the hanger 1 after assembly, ensuring that when the rod body 5.2 of the relief valve pull rod 5 is in the non-working position after the manual relief operation working position, it automatically slides to and is located at the bottom of the groove of the wear-resistant pad 4 under the action of its own weight and the clamping force of the clamping seat 3. The wear-resistant pad 4 is used in conjunction with the clamping device to reduce the relief valve pull rod 5 caused by the shaking of the vehicle during vehicle operation. The movement frequency of the valve release rod 5 is reduced, so as to avoid excessive wear of the valve release rod 5 and excessive wear caused by friction between the valve release rod 5 and the edge of the vertical long hole of the special-shaped hole in the bottom plate of the hanger 1, thereby extending the service life and maintenance cycle of the valve release rod 5, improving the maintenance efficiency of the valve release rod 5, reducing the maintenance cost and improving the safety performance, and solving the problem that the abnormal wear of the contact part between the existing valve release rod handle and the L-shaped anti-drop plate causes the breakage of the valve release rod 5 handle, affecting driving safety, maintenance cost and maintenance efficiency.

[0129] The relief valve pull rod 5 adopts a limiting structure of the clamping force of the clamping seat 3 and the supporting force of the wear-resistant pad 4, avoiding the problems existing in the existing riveting or spot welding of fasteners after assembly, and will not damage the accessories during disassembly, with the advantages of simple disassembly, high efficiency and low cost, and solves the problem that the installation bolts or rivets of the left relief valve pull rod 4' and the right relief valve pull rod 12' need to be cut before maintenance, which easily burns the installation holes, causing the L-shaped anti-slip plate and the hanger 2' to need to be welded or scrapped, resulting in high maintenance costs.

[0130] g. If the relief valve pull rod 5 is pulled by the force due to assembly and manufacturing errors, first lift the handle 5.1 of the relief valve pull rod 5 upward, so that the rod body 5.2 of the relief valve pull rod 5 is lifted upward along the vertical long hole set below the special-shaped hole 1.6 set below the bottom plate of the hanger 1 to the horizontal long hole set above it, so that it swings left and right and up and down in a certain range in the horizontal direction to eliminate the force, and then pull the handle 5.1 of the relief valve pull rod 5 to operate. After the operation is completed, when the relief valve pull rod 5 handle 5.1 is released, the relief valve pull rod 5 quickly moves and resets under the action of the relief valve handle 8' reset spring 2, and at the same time, the relief valve pull rod 5 quickly slides down to the vertical long hole below the special-shaped hole 1.6 under the action of its own weight, the self-weight of the pressing seat 3 and the restoring tension of the pressing seat 3 spring 2, and finally falls on the bottom of the arc of the groove set on the upper surface of the wear-resistant pad 4. The device is provided with a swing function of the relief valve pull rod 5 within a certain range, and because the force is eliminated, it is more labor-saving when the relief valve pull rod 5 is pulled. The invention solves the problems that the relief valve pull rod of the existing railway freight car is stuck, causing the relief valve handle 8' to be unable to be reset and further causing the railway freight car to have poor braking and relief failures.

[0131] h Since the base 3.1 and the hanger 1 are both formed by integrally pressing steel plates of the same material and thickness, the existing relief valve tie rod base 1' and hanger 2' welded structure needs to involve multiple manufacturing processes such as cutting, bending and welding of multiple pieces of steel and plates, and there are problems such as cumbersome raw material procurement and storage and retrieval, time-consuming and labor-intensive, long manufacturing cycle, low production efficiency, difficult quality assurance and high manufacturing or maintenance costs.

[0132] i The clamping seat 3 on the bottom plate of the hanger 1 can move upward a certain distance under the action of external force, and after the external force is cancelled, the second sleeve 3.2 arranged at the bottom is in the role of clamping the relief valve tie rod 5 under the action of its own weight and the pulling force of the spring 2, so as to prevent the relief valve tie rod 5 from frequently jumping upward to the horizontal direction above the special-shaped hole 1.6 on the bottom plate 1.2 of the middle part of the hanger 1 and falling back to the long circular hole in the vertical direction below due to the shaking of the vehicle body during the operation of the vehicle. If the rod body 5.2 of the relief valve tie rod 5 is in contact with the periphery of the special-shaped hole 1.6 for a long time and frequently, it will cause wear, and when the wear exceeds the limit, it must be replaced with a new part during maintenance for safety reasons.

[0133] j The hanger 1 and the protective seat 6 of the device of the invention have a simple structure, are easy to manufacture, have relatively large strength and rigidity, are highly reliable, and do not affect the assembly and maintenance of other components.

[0134] k The device of the invention meets the requirements of anti-loosening, anti-falling and protection. The disassembly and assembly tools of the relief valve rod 5 are easy to carry, which meets the requirements of field operations without large tools. The device is easy to manufacture, repair and inspect, and meets the requirements of high reliability and high safety. The main active contact parts are made of wear sleeves and wear-resistant pads 7 and other materials with strong wear and corrosion resistance, which prolongs the maintenance cycle and reduces the maintenance cost. When assembling and disassembling the relief valve rod 5, the device will not damage the installation holes.

[0135] The device of the invention will not affect the components and functions of the braking device, and is convenient for factories and vehicle depots to retrofit and repair existing railway freight cars.

[0136] The device has a symmetrical structure with good stress, high strength, high rigidity, long service life, light weight, good processability, easy manufacturing and maintenance, and saves time. It has the characteristics of high assembly and disassembly efficiency of the relief valve tie rod 5, low cost, and good economy. It effectively solves the problems of low assembly and disassembly efficiency and high manufacturing and repair cost of the relief valve tie rod 5 of the existing device. The symmetrical structural design of the device improves the processability, aesthetics, and commercialization.

[0137] The relief valve pull rod 5 of the device of the invention does not need to be connected with fasteners, which avoids the problem that the existing vehicle depot and other units, due to the lack of special riveting equipment, use bolts and nuts to connect and then use electric welding for spot welding instead of rivets and collars to connect and fasten the solution, and the existing special rivets, collars or bolts and nuts cannot be reused, the manufacturing and maintenance costs are high, and the overall economic benefits are poor; because the movable parts of the device of the invention are not connected or spot-fastened by electric welding in the subsequent maintenance, it completely solves the problem that when the existing steel relief valve pull rod 5 handle 5.1 is assembled with the hanging assembly and then connected with welding or bolts, nuts and other fasteners and then use electric welding for spot welding instead of rivets and collars, when the ground line is improperly processed, there is a problem that pitting corrosion of the relief valve and the bogie bearing due to the passage of current affects the driving safety.

[0138] oThe device has a simple structure. The main parts such as the protective seat 6 and the hanger 1 are manufactured by bending or pressing high-strength and corrosion-resistant steel plates, which is convenient for batch manufacturing. All wear parts are made of self-lubricating and wear-resistant nylon and other materials. They are easy to assemble and disassemble, have good economy, and have a high reuse rate during maintenance, which can effectively reduce procurement and transportation costs, is conducive to improving assembly quality, and saves manufacturing costs.

[0139] The device has high reliability, long service life, safety, better protection performance, and meets the requirements of anti-loosening and anti-falling. The technology can be applied in batches on new general-purpose open wagons, flat wagons, box wagons, tank wagons, etc., which have 120-type control valves installed under the chassis, and can also be modified and promoted on existing railway wagons mentioned above.

[0140] q The clamping seat 3 is connected to the hanger 1 by a positioning pin 10 with a positioning sleeve 11, so that it has the function of guiding and moving a certain distance upward along the hanger 1 under the action of external force while connected, and quickly resets under the action of its own weight and the restoring force of the spring 2 after the external force is removed.

[0141] When the railway freight car relief valve tie rod hanger device of this embodiment is used, take the railway freight car as an example:

[0142] The two sets of the device are arranged symmetrically on the left and right sides near the lower inner side of the side beams on both sides of the vehicle body chassis, and the left and right sets of the device are completely the same in structure, size and accessories except that the length of the relief valve pull rod 5 is different. Each set of the device is mainly composed of a hanger 1, a clamping seat 3, a spring 2, a wear-resistant pad 4, a relief valve pull rod 5, a protective seat 6, an elastic pad 7, at least 4 special rivets 8, at least 4 special rivet rings 9, 2 positioning pins 10, 2 positioning sleeves 11, 2 first elastic washers 12, 2 first nuts 13, 2 first cotter pins 14, 2 first bolts with holes 15, 2 second elastic washers 16, 2 second nuts 17, 2 second cotter pins 18, etc. The device is symmetrically mounted on the side beams on both sides of the chassis, and the heads 5.3 of the two relief valve pull rods 5 are installed on the relief valve handle 8' of the 120 type air control valve using a first round pin 19, a first sleeve 20, a first flat washer 21 and a third cotter pin 22.

[0143] The installation sequence and usage functions are as follows:

[0144] First, turn the U-shaped openings of the upper parts of the hangers 1 on both sides downward, align them with the corresponding lines on the side beams along the transverse center line of the vehicle body chassis, and weld their ends and the lower edges of the two webs to the inner webs and lower wing edges of the side beams to form a box structure. Then, use the second round pin 3.3, the fourth cotter pin 3.4 and the second flat washer 3.5 to assemble the second sleeve 3.2 in the middle of the second round pin assembly hole 3.1.4 set at the lower part of the webs 3.1.2 on both sides of the base 3.1 of the clamping seat 3, and then split the two legs of the cotter pin opening to 60°; insert the second hole bolt 3.6 from the outside to the inside into the second hole bolt connection hole 3.1.5 set at the vertical center line above the bottom plate 3.1.1 of the base 3.1 of the clamping seat 3, and use the third elastic washer 3.7 and the third nut 3.8 to tighten it. After tightening, the cotter pin hole at the end of the bolt is in a horizontal state for easy assembly with the spring 2; respectively insert the two positioning sleeves 11 into the positioning pin 1 0's positioning part 10.2, and then make the two positioning pins 10 successively penetrate into the two guide holes 3.1.3 of the bottom plate 3.1.1 of the clamping seat 3 and the corresponding positioning pin 10 connecting circular holes of the bottom plate of the hanger 1, use the first elastic washer 12, the first nut 13 and the first cotter pin 14 to connect the two positioning pins 10, and use the hexagonal wrench and the ordinary wrench to tighten the positioning pin 10 respectively, then split the two legs of the cotter pin opening to 60°, and then use the spring 2 to connect the cotter pin hole at the end of the second hole bolt 3.6 installed on the clamping seat 3 and between the hanging ring 1.5 of the hanger 1, at this time, the connection and assembly of the clamping seat 3 and the hanger 1 are completed; place the wear-resistant pad 4 with the groove facing up above the bending edge 1.7 of the lower part of the hanger 1, and align the mounting holes, use the first hole bolt 15, the second elastic washer 16, the second nut 17 and the second cotter pin 18 to connect them, and after tightening, split the two legs of the cotter pin opening to 60°.

[0145] Subsequently, the welded protective seat 6 is assembled with the belly plate facing the inside of the vehicle under the side beam of the hanger 1 facing the outside of the vehicle chassis, and after being welded to the lower plane of the lower wing edge of the side beam, the countersunk hole 7.1 of the elastic pad 7 is directed toward the outside of the vehicle chassis, and after it is aligned with the mounting hole of the protective seat 6, a special rivet 8 with its head facing the outside of the chassis and a special rivet ring 9 are tightened and cold riveted for assembly using a special riveting equipment.

[0146] In order to improve the assembly efficiency of the whole vehicle line, the clamping seat 3, spring 2, wear-resistant pad 4 and elastic pad 4 can be assembled in advance in the under-vehicle process, and then connected to the vehicle after they are assembled with the hanger 1 and the protective seat 6 under the vehicle. The assembly order of the clamping seat 3 and the wear-resistant pad 4 and the hanger 1 and the protective seat 6 can be adjusted. At this time, the assembly of the hanger 1, the clamping device and the protective device has been completed.

[0147] Then, the handles 5.1 of the relief valve pull rods 5 on both sides are respectively directed toward the outside of the vehicle body, and the heads 5.3 are successively inserted through the process holes 7.2 of the elastic pad 7, the protective seat 6 and the special-shaped holes 1.6 set below the bottom plate of the hanger 1. Before inserting into the special-shaped holes 1.6, the pressing seat 3 must be lifted by hand and moved upwards for a certain distance to expose the space for the head 5.3 of the relief valve pull rod 5 to penetrate between the second sleeve 3.2 set below and the wear-resistant pad 4. Finally, the first round pin 19, the first flat washer 21 and the third opening are used to tighten the pressure seat 3. The opening pin 22 connects the first sleeve 20 assembled in the circular hole of the head 5.3 of the relief valve pull rod 5 on both sides with the corresponding pin holes on both sides of the groove of the relief valve handle 8' to form an integrated anti-detachment structure. After assembly, the tail of the opening pin is split 60°. At the same time, the rod body 5.2 near the handle 5.1 end of the relief valve pull rod 5 is located in the bottom of the arc groove set in the middle of the upper part of the wear-resistant pad 4 set at the lower part 1.7 of the hanger 1 due to the combined action of its own weight, the own weight of the clamping seat 3 and the clamping force of the spring 2. At this time, the assembly of the relief valve pull rod 5 has been completed.

[0148] The disassembly process of the device to relieve the valve pull rod 5 is opposite to the installation process thereof. During maintenance, when the connecting round pins are intact and the wear is within the limit, there is no need to dismantle and replace them with new ones.

[0149] The device of the invention is easy to maintain, highly efficient, low cost and safe. It not only solves the problems of the existing relief valve hanger 2' and relief valve pull rod 5, but also solves the driving safety problems caused by the untimely handling of the existing faulty vehicle. The device adopts corrosion-resistant and wear-resistant materials to improve the corrosion and wear resistance, and improves its service life and the number of reuses. Compared with the existing hanger 2', the hanger 1 adopts a small amount of local welding to replace the existing full welding connection method, which reduces the welding workload and reduces the pollution of welding harmful gases to the atmosphere.

[0150] The anti-collision protection principle of the device is as follows:

[0151] For example, when the vehicle is hit by external forces from the outside of the vehicle such as cargo, loaders and forklifts during loading and unloading, it will first contact the outermost protective seat 6 and elastic pad 7 installed under the chassis side beam. Since the protective seat 6 has a certain strength and rigidity, and the elastic pad 7 has a certain elasticity and buffering effect, it can play a role in blocking and buffering accidental collisions with external forces such as cargo or loaders, thereby preventing the relief valve tie rod 5 and its hanger 1 and other accessories installed on the inner side of the protective seat 6 from being hit by the above-mentioned external forces, causing the hanger 1 to bend, deform, break or crack, thereby improving railway transportation safety. The invented device solves the problem that the existing railway freight car relief valve tie rod 5 hanger 1 is easily hit by cargo, loaders and forklifts during loading and unloading, causing the relief valve tie rod 5 hanger 1 to be welded, cracked, broken or severely bent and deformed from the welding position, affecting the vehicle's braking relief performance and driving safety.

[0152] A horizontal long circular hole 7.2 with a certain length is respectively arranged at the center of the seat plate 6.1 of the protective seat 6 and the elastic pad 7 connected thereto, so that there is enough space for manually pulling the relief valve handle 8' to perform manual relief operation. The problem that the existing railway freight car relief valve pull rod handle is easily hit by cargo, loaders and forklifts during loading and unloading, causing the relief valve pull rod handle to be welded open, cracked or severely bent and deformed from the welding position, affecting the vehicle's braking relief performance and driving safety is solved. The relief valve pull rod 5 of the annular handle 5.1 is directly inserted into the long hole of the hanger 1 to replace the existing relief valve pull rod trapezoidal closed welding handle and the rivet connection structure used in the hanger, and has the advantages of simple assembly and maintenance process, good economy, high efficiency, low cost and good safety.

[0153] The opening of the handle 5.1 of the relief valve lever 5 is welded under the vehicle to avoid the problems of high maintenance cost, inconvenience in maintenance and hidden dangers of driving safety in existing vehicles. The principle is as follows:

[0154] When disassembling the relief valve pull rod 5, it is only necessary to remove the cotter pin, flat washer, wear-resistant sleeve and round pin connected to the head 5.3 of the relief valve handle 8', so as to pull out the relief valve pull rod 5 from the movable hole of the relief valve pull rod on the outside of the hanger 1, thereby solving the problem that when dealing with the failure of the relief valve pull rod, it is necessary to remove the L-shaped anti-drop plate and the relief valve pull rod handle from the hanger 2' as a whole, which is time-consuming and laborious; the invention has the advantages of convenient assembly and maintenance, high efficiency, low cost and good safety, and solves the problem that the existing L-shaped anti-drop plate and the relief valve pull rod hanger 2' are fastened with special rivets, rings or bolts and nuts and then spot welded to prevent them from falling off, which requires special riveting equipment to assemble or spot welding with an electric welder, resulting in the inability to quickly disassemble on site It is difficult to saw bolts or rivets with saw blades, and the labor intensity is high. Disassembly is time-consuming and labor-intensive, and the processing cycle is long. It is difficult to complete within the technical inspection time, which affects the timely processing of faults such as excessive wear of the valve pull rod. There are not only many parts, many manufacturing and maintenance processes, high costs and low efficiency, but also safety hazards and inconvenience in handling temporary repairs. At the same time, it also solves the problem that other disassembly tools used in existing structures are inconvenient to carry, and are restricted by factors such as space and sparks during processing, which poses certain safety hazards. The mismatch of on-site maintenance tools increases the difficulty of processing, and to a certain extent also restricts the enthusiasm for on-site processing of faulty vehicles, which is not conducive to improving the overall operating quality of vehicles;

[0155] In order to facilitate manual operation and improve the degree of humanization, the handle 5.1 of the relief valve rod 5 adopts an elliptical ring-shaped and horizontally placed closed structure. After being welded under the vehicle, it is inserted from the outside to the inside and assembled in the corresponding hole of the relief rod hanger. Finally, the relief valve head 5.3 and the relief valve handle 8' are connected with a pin sleeve, avoiding the welding problem of the existing relief valve rod 5; the relief valve rod 5 does not need to be connected with fasteners, avoiding the existing vehicle depot and other units that do not have special riveting equipment and use bolts and nuts to connect and then use electric welding for spot welding instead of rivets and sleeves to connect the fastening method The existing problems in the case are that the special rivets, collars or bolts and nuts for installation cannot be reused, the manufacturing and maintenance costs are high, and the comprehensive economic benefits are poor. Since the movable parts of the device of the invention do not use electric welding or spot fixing in the subsequent maintenance, it completely solves the problem that when the existing steel relief valve pull rod handle is assembled with the hanging assembly and then connected with fasteners such as welding or bolts and nuts and then spot welding is used instead of rivets and collars, when the local line is not properly handled, there is a problem that the relief valve and the bogie bearings are corroded by over-current and cause driving accidents.

[0156] The principle of relieving the contact of the valve rod 5 to avoid excessive wear and tear on existing vehicles is as follows:

[0157] The clamping seat 3 can move upward a certain distance on the bottom plate of the hanger 1 under the action of external force, and after the external force is cancelled, the second sleeve 3.2 arranged at the lower part is in the role of clamping the relief valve rod 5 under the action of its own weight and the pulling force of the spring 2, preventing the relief valve rod 5 from frequently jumping upward to the horizontal direction above the special-shaped hole 1.6 on the bottom plate 1.2 of the middle part of the hanger 1 and falling back to the oblong hole in the vertical direction below due to the shaking of the vehicle body during the operation of the vehicle, thereby avoiding excessive wear of the contact part of the relief valve rod 5 with the hole after long-term and frequent peripheral contact, thereby shortening its service life.

[0158] In order to reduce the wear and friction resistance of the relief valve pull rod 5, facilitate the limiting of the relief valve pull rod 5, improve its own wear resistance and enable the relief valve pull rod 5 to move flexibly under the action of manual or relief valve handle 8' restoring force, if the relief valve pull rod 5 has pulling interference force, you can grab the relief valve pull rod 5 handle 5.1 by hand to drive the relief valve pull rod 5 rod body 5.2 to move the clamping seat 3 and the second sleeve 3.2 in contact with it upward to the horizontal long hole set above the special-shaped hole 1.6 set on the bottom plate of the hanger 1, and then swing the relief valve pull rod 5 rod body 5.2 left and right to eliminate the interference force and then implement the relief operation of the relief valve. The second sleeve 3.2 arranged below the clamping seat 3 is made of wear-resistant nylon and other materials with good self-lubrication and wear resistance. It has a cylindrical rolling friction structure that can rotate around the second round pin 3.3. Its material hardness is softer than the material of the relief valve pull rod 5 connected and in contact with it, and has the advantages of self-lubrication and good wear resistance, ensuring that the parts in contact with it will not wear out after long-term use. During subsequent maintenance, if the second sleeve 3.2 is worn beyond the limit, it is only necessary to replace the rolling sleeve, which can improve the maintenance efficiency of the vehicle and reduce the maintenance cost.

[0159] The wear-resistant pad 4 with a groove is adopted to increase the contact area with the relief valve pull rod 5. The arc surface at the bottom of the groove is higher than the lower side of the vertical long hole 1.6 of the special-shaped hole 1.6 of the bottom plate of the hanger 1 after assembly. The width of the arcs on both sides of the upper part of the groove is smaller than the width of the vertical long hole 1.6 of the special-shaped hole 1.6 of the bottom plate of the hanger 1, and the upper part of the groove and the bottom arc adopt a tangent transition to ensure that when the rod body 5.2 of the relief valve pull rod 5 is in the non-working position after the manual relief operation working position, it automatically slides to and is at the bottom of the groove of the wear-resistant pad 4 under the action of its own weight and the clamping force of the clamping seat 3. The wear-resistant pad 4 is used in conjunction with the clamping device to reduce The frequency of movement of the relief valve tie rod 5 due to the shaking of the vehicle during vehicle operation is reduced, thereby avoiding excessive wear of the relief valve tie rod 5 and excessive wear caused by friction between the relief valve tie rod 5 and the edge of the vertical long hole 1.6 of the special-shaped hole in the bottom plate of the hanger 1, extending the service life and maintenance cycle of the relief valve tie rod 5, improving the maintenance efficiency of the relief valve tie rod 5, reducing the maintenance cost and improving the safety performance, and solving the problem that the abnormal wear of the contact part between the existing relief valve tie rod handle and the L-shaped anti-drop plate causes the relief valve tie rod handle to break, affecting driving safety, maintenance cost and maintenance efficiency.

[0160] The relief valve pull rod 5 adopts a limiting structure of the clamping force of the clamping seat 3 and the supporting force of the wear-resistant pad 4, avoiding the problems existing in the existing rivets or spot welding after fasteners are assembled, and will not damage the accessories during disassembly. It has the advantages of simple disassembly, high efficiency and low cost, and solves the problem that the installation holes of the existing relief valve pull rod need to be burned when the installation bolts or rivets are cut before maintenance, resulting in the L-shaped anti-slip plate and the hanger 2' needing to be welded or scrapped, resulting in high maintenance costs.

[0161] The principle of relieving the valve rod 5 from falling off due to wear towards the head 5.3 in the vehicle is as follows:

[0162] Under the premise of not affecting the connection functions and the rotation of the head 5.3 of the relief valve tie rod 5: by increasing the width of the head 5.3 of the relief valve tie rod 5 and the size of the mounting hole; at the same time, a wear-resistant sleeve with good self-lubrication and wear resistance is assembled in the round holes of the head 5.3 of the relief valve tie rod 5 on both sides and connected with the corresponding pin holes, round pins, washers and cotter pins of the relief valve handle 8' to form an integrated anti-drop structure, thereby improving the wear resistance of the head 5.3 and avoiding the occurrence of the relief valve tie rod 5 head 5.3 falling off due to excessive wear of the round hole. In subsequent maintenance, if the wear-resistant sleeve is worn beyond the limit, it is only necessary to replace the wear-resistant sleeve, which improves the maintenance efficiency and reduces the maintenance cost. It solves the problem that when the existing relief valve tie rod has a large processing deviation and excessive wear on the head round hole facing the inside of the vehicle, such as when the hanger 2' at the relief valve tie rod handle is also broken and falls off at the same time, it will cause the relief valve tie rod to fall off and be lost.

[0163] Principle of preventing the valve lever 5 from getting stuck:

[0164] If the relief valve rod 5 is difficult to pull due to assembly and manufacturing errors, first lift the relief valve rod 5 handle 5.1 upwards, so that the relief valve rod 5 body 5.2 is lifted upwards along the vertical long hole set below the special-shaped hole 1.6 set below the bottom plate of the hanger 1 to the horizontal long hole set above it, so that it swings left and right and up and down to a certain range in the horizontal direction to eliminate the difficulty, and then pull the relief valve rod 5 handle 5.1 to operate. After the operation is completed, when the relief valve rod 5 handle 5.1 is released, the relief valve rod 5 quickly moves and resets under the action of the relief valve handle 8' reset spring 2, and at the same time, the relief valve rod 5 quickly slides down to the vertical long hole below the special-shaped hole 1.6 under the action of its own weight, the self-weight of the pressing seat 3 and the restoring tension of the pressing seat 3 spring 2, and finally falls on the bottom of the arc of the groove set on the upper surface of the wear-resistant pad 7. The device is provided with a swinging function of the relief valve rod 5 within a certain range. Since the special force is eliminated, it is more labor-saving to pull the relief valve rod 5, and the relief valve rod 5 will not be stuck. This solves the problem that the relief valve rod 5 of the existing railway freight car is stuck, causing the relief valve handle 8' to be unable to reset and further causing poor braking and relief failures of the railway freight car.

[0165] Principle of improving corrosion resistance:

[0166] The protective seat 6 and the hanger 1 are both formed by pressing high-strength, corrosion-resistant thick-walled steel plates, and have sufficient strength, rigidity and corrosion resistance, which can significantly extend the maintenance cycle, improve the manufacturing and repair efficiency and reduce the manufacturing and repair costs.

[0167] Wear-resistant sleeves and other wear accessories are made of self-lubricating, wear-resistant nylon and other materials. They are easy to assemble and disassemble, have good economy, and have a high reuse rate during maintenance. They can effectively reduce procurement and transportation costs, which is beneficial to improving assembly quality and efficiency and saving manufacturing costs.

[0168] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A railway freight car relief valve tie rod hanger device, characterized in that: include: At least one relief valve tie rod, one end of which is used to connect with the relief valve; At least one tie rod hanger structure, the tie rod hanger structure comprising: The hanger is L-shaped, one end of which is connected to the inner groove of the side beam, and the other end of which is provided with a special-shaped hole, and the other end of the relief valve pull rod passes through the special-shaped hole and is exposed; A pressing seat, arranged above the special-shaped hole, for providing a force to push the pull rod of the relief valve downward; A wear-resistant pad is arranged below the special-shaped hole and is used to support the relief valve pull rod so that it is located in the middle of the special-shaped hole; The other end of the hanger is provided with an oblong hole and a hanging ring in sequence from top to bottom, the hanging ring is located between the oblong hole and the special-shaped hole, and both sides of the oblong hole are connected with positioning pins through positioning pin connecting holes; The pressing seat comprises: A base, comprising a bottom plate and two webs, wherein the two webs are respectively located on both sides of the bottom plate and are in a U-shaped structure, wherein the bottom plate is provided with a second hole-bolt connection hole and two guide holes matched with the positioning pins, wherein the two guide holes are respectively located on both sides of the second hole-bolt connection hole, and the two webs are provided with a second round pin assembly hole; A second round pin, both ends of which are rotatably connected to the two second round pin assembly holes, and an outer circumference is sleeved with a second sleeve for slidingly connecting with the relief valve pull rod; A second bolt with a hole, the threaded end of which passes through the second bolt hole and the oblong hole in sequence and is exposed, and the exposed end is connected with a third elastic washer and a third nut in sequence; A spring has one end connected to the hanging ring and the other end connected to the exposed end of the second eyelet bolt.

2. A railway freight car relief valve tie rod hanger device according to claim 1, characterized in that: The positioning pin includes a columnar head, a positioning portion and a tail portion which are concentrically connected in sequence, the diameters of the head, the positioning portion and the tail portion decrease in sequence, the outer periphery of the positioning portion cooperates with the inner periphery of the guide hole, the outer periphery of one end of the tail portion close to the positioning portion is smooth, and the outer periphery of one end of the tail portion away from the positioning portion is provided with a thread and a cotter pin hole.

3. A railway freight car relief valve tie rod hanger device according to claim 1, characterized in that: The relief valve pull rod comprises a Z-shaped rod body, one end of which is provided with a rod head matched with the relief valve, and the other end of which is provided with a handle.

4. A railway freight car relief valve tie rod hanger device according to claim 3, characterized in that: The handle is arranged horizontally, and the rod head is arranged vertically in a ring shape.

5. A railway freight car relief valve tie rod hanger device according to claim 1, characterized in that: The special-shaped hole comprises a vertical long waist hole and a horizontal long waist hole, and one end of the vertical long waist hole is connected to the middle of the horizontal long waist hole in a T shape.

6. A railway freight car relief valve tie rod hanger device according to claim 5, characterized in that: It also includes a first bolt with a hole, the wear-resistant pad is upwardly provided with a groove matching the lower end of the special-shaped hole, the lower part of the other end of the hanger is provided with a first bolt connecting hole, the wear-resistant pad is provided with a countersunk hole, the threaded end of the first bolt with a hole passes through the countersunk hole and the first bolt connecting hole in sequence and is exposed, and the exposed end is sequentially provided with a second elastic washer, a second nut and a second cotter pin.

7. A railway freight car relief valve tie rod hanger device according to claim 3, characterized in that: A protective structure is provided in the gap at the other end of the hanger, and the protective structure comprises: A protective seat is provided at the lower end of the side beam, and forms an open box-like structure with the side beam, and the other end of the relief valve tie rod is located in the box-like structure; An elastic pad is arranged at one end of the protection seat away from the relief valve tie rod; A process hole passes through the protective seat and the elastic pad, and the handle of the relief valve pull rod can pass through the process hole.

8. A railway freight car relief valve tie rod hanger device according to claim 7, characterized in that: A rib plate is arranged between the protection seat and the side beam.

9. A railway freight car, characterized in that: include: A relief valve, the relief valve being arranged on one side of the center line of the railway freight car; Two railway freight car relief valve tie rod hanger devices according to any one of claims 1 to 8; Two tie rod suspension seat structures are symmetrically arranged on both sides of the railway freight car; Two relief valve pull rods, the two relief valve pull rods have different lengths.

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