A collision-resistant railway freight car relief valve tie rod connection device

Abstract

The invention discloses an impact-resistant railway freight car relief valve tie rod connecting device, which relates to the technical field of railway freight car brakes, and comprises: at least one tie rod installation mechanism, the tie rod installation mechanism comprises a base structure and a handle, the base structure is connected to the inner side of the side beam of the car body, the handle comprises a hand ring, the hand ring is in an oblong shape, the hand ring is connected to the base structure through a hanging ring, and the handle can be driven to swing along the longitudinal direction and the transverse direction of the car body through the hanging ring; at least one relief valve pulling structure, one end of which is sleeved on the side of the handle, and the other end of the relief valve pulling structure is hinged to the relief valve handle; the problem that the existing railway freight car relief valve tie rod hanging seat and relief valve tie rod handle are easily impacted by goods, loaders and forklifts during loading and unloading, causing the relief valve tie rod hanging seat and the relief valve tie rod handle to be welded, cracked, broken or severely bent and deformed from the welding position, affecting the vehicle braking relief performance and driving safety.

Description

Technical Field

[0001] The invention belongs to the technical field of railway freight car braking, and more specifically, relates to an impact-resistant railway freight car relief valve tie rod connecting device. Background Art

[0002] The 120-type air control valve is the core component of the railway freight car brake system. It mainly realizes the braking and release of the vehicle and is the control center of the brake system. The release valve pull rod 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 pull rod 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 relief valve tie rod hangers. Most types of railway freight cars, such as general open cars, flat cars, box cars, tank cars, etc., are limited by the car body structure. Figures 1 to 3 As shown, the 120-type air control valve 10' is installed under one side of the middle beam 11' in the middle of the vehicle body chassis through its mounting seat, and the mounting holes of the left relief valve tie rod 4' and the right relief valve tie rod 12' made of round steel with a diameter of 10mm with inconsistent long ends facing the flat end inside the vehicle are connected to the relief valve handle 8' of the 120-type air control valve 10' with a cotter pin 9', and the other ends of the left and right relief valve tie rods facing outside the vehicle are respectively extended to under the side beams 7' on both sides of the vehicle body chassis. In order to prevent the relief valve pull rod from falling off, the ends of the relief valve pull rod handles on the left and right sides are respectively inserted into the mounting holes below the L-shaped anti-slip plate 3' under the vehicle, and then the handles are annealed into a closed trapezoidal structure with a straight side length of 200mm, and the interface is sealed and welded by electric welding. Then, two special rivets 5' and special rivet rings 6' are used to align the two holes on the top of the anti-slip plate 3' installed on the relief valve handle end with the two mounting holes on the lower part of the hanger 2' welded on the first base 1' installed on the inner side of the side beam 7', and then tightened and fixed with special riveting equipment, so that the operator can stand on either side of the car body to manually relieve the railway freight car 120 type air control valve by pushing and pulling the relief valve pull rod handle, so as to ensure that the vehicle braking and relief working conditions are good.

[0004] Due to the deformation, open welding, cracking, wear, falling and other faults of the relief valve rod hanger, base and relief valve rod of the existing railway freight cars, it has become one of the main faults for the safe operation of freight trains in recent years. With the rapid development of my country's railway freight cars and the improvement of the overall design and manufacturing level of vehicles, the traditional relief valve rod hanger and relief valve rod structure can no longer meet the requirements of high manufacturing and repair efficiency, low cost, convenient disassembly and installation, and commercialization. Therefore, it is expected to develop a new type of relief valve rod connection device and relief valve rod technology for railway freight cars. Summary of the invention

[0005] The purpose of the present invention is to provide an impact-resistant railway freight car relief valve tie rod connecting device in view of the deficiencies in the prior art, so as to solve the problem that the existing railway freight car relief valve tie rod hanging seat and relief valve tie rod handle are easily impacted by cargo, loaders and forklifts during loading and unloading, causing the relief valve tie rod hanging seat and relief valve tie rod handle to be welded, cracked, broken or severely bent and deformed at the welding point, affecting the vehicle's braking relief performance and driving safety.

[0006] In order to achieve the above-mentioned object, the present invention provides an impact-resistant railway freight car relief valve tie rod connection device, comprising:

[0007] At least one pull rod installation mechanism, the pull rod installation mechanism includes a base structure and a handle, the base structure is connected to the inner side of the side beam of the vehicle body, the handle includes a hand ring, the hand ring is oblong, the hand ring is connected to the base structure through a hanging ring, and the handle can be driven to swing along the longitudinal direction and the transverse direction of the vehicle body through the hanging ring;

[0008] At least one relief valve pulling structure has one end sleeved on the side of the handle and the other end of the relief valve pulling structure is hinged to the relief valve handle.

[0009] Optionally, the base structure comprises:

[0010] A first seat plate, wherein the first seat plate is Z-shaped, a horizontal end of the first seat plate facing the outer side of the side beam is welded to a lower wing edge of the side beam, and a horizontal end of the first seat plate facing the inner side of the side beam is provided with a longitudinal oblong hole;

[0011] a first rib plate, disposed between the first seat plate and the web plate of the side beam;

[0012] A ring bolt comprises an upper screw portion and a lower circular ring portion, wherein the upper screw portion is connected to the longitudinal oblong hole through a nut, and the lower circular ring portion is connected to the lifting ring.

[0013] Optionally, the base structure comprises:

[0014] A second seat plate, the second seat plate is L-shaped, and a long end of the second seat plate is vertically welded to the web of the side beam;

[0015] A hanging plate, vertically connected to the long end of the second seat plate, and a receiving groove is formed between one side of the hanging plate and the short end of the second seat plate;

[0016] A second rib plate, the outer periphery of which is respectively connected to the lower wing plate of the side beam, the web plate of the side beam, the long end of the second seat plate and the other side of the hanging plate;

[0017] A chain ring, the upper end of which is arranged in the receiving groove through a round pin, and the lower end of which is connected to the lifting ring.

[0018] Optionally, the base structure comprises:

[0019] A third seat plate, the third seat plate is L-shaped, the long end of the third seat plate is vertically welded to the web of the side beam, and the short end of the third seat plate is connected to the lifting ring through a first round through hole;

[0020] A third rib plate, the outer periphery of which is respectively connected to the lower wing plate of the side beam, the web plate of the side beam, the long end of the second seat plate and the short end of the second seat plate.

[0021] Optionally, the hanging ring includes an upper ring, a rod and a lower ring, the two ends of the rod are respectively provided with the upper ring and the lower ring perpendicular to each other, the upper ring is connected to the base structure, and the lower ring is arranged on the upper part of the bracelet and connected thereto.

[0022] Optionally, the handle also includes a sleeve and two connecting plates, the sleeve is sleeved on the straight section of the hand ring toward the outside of the side beam, one end of the connecting plate is connected to the straight section of the hand ring toward the inside of the side beam, and the other end of the connecting plate is hinged to the relief valve pulling structure through a first round pin.

[0023] Optionally, the relief valve pulling structure is a relief valve pull rod, which includes a tail, a first rod shaft and a head, the first rod shaft is Z-shaped, the tail and the head are respectively provided with a second circular through hole and a third circular through hole, the second circular through hole is hinged to the side of the handle, and the third circular through hole is hinged to the relief valve handle.

[0024] Optionally, the relief valve pulling structure is a relief valve pull rope, and the relief valve pull rope includes a steel wire rope, and the steel wire rope is hinged to the side of the handle and the relief valve handle through rings at both ends.

[0025] Optionally, an assembly groove is provided on the relief valve handle, a round through hole is provided on the side wall of the assembly groove, and the end of the relief valve pulling structure is connected to the round through hole via a second round pin.

[0026] Optionally, the lower portion of the ring bolt is not lower than the lower wing edge of the side beam.

[0027] The present invention provides an impact-resistant railway freight car relief valve tie rod connecting device, which has the following beneficial effects: a wristband in the connecting device is an oblong structure, a base structure is connected to the wristband to realize rotation and horizontal swinging at a certain angle in the car, so as to alleviate the indirect destructive effect of external force collision on the handlebar and the relief valve pulling structure, and the flexible connection structure of the relief valve pulling structure and its connecting device has the functions of micro-adjustment in the horizontal, longitudinal and vertical directions, and in addition, the handlebar can also swing up and down, front and back and in other directions relative to the base structure, avoiding deformation or damage caused by direct impact of external force, improving railway transportation safety, and solving the problem that the existing railway freight car relief valve tie rod hanging seat is easily impacted by goods, loaders and forklifts during loading and unloading, causing the relief valve tie rod hanging seat to be welded, cracked, broken or severely bent and deformed from the welding position, affecting the vehicle braking relief performance and driving safety.

[0028] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] 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.

[0030] Figure 1 A schematic diagram of the existing railway freight car relief valve pull rod and hanger structure is shown.

[0031] Figure 2 The enlarged schematic diagram of the local structure of the existing railway freight car relief valve pull rod and hanger is shown.

[0032] Figure 3 Shows Figure 1 Schematic diagram of the connection structure between the left and right relief valve pull rod heads and the relief valve handle in the A-direction view.

[0033] Figure 4 A schematic structural diagram of a railway freight car relief valve tie rod connection device that is impact-resistant according to Embodiment 1 of the present invention is shown.

[0034] Figure 5 Shows Figure 4 Right view of .

[0035] Figure 6 A schematic structural diagram of a first base according to an embodiment of the present invention is shown.

[0036] Figure 7 Shows Figure 6 Top view of the .

[0037] Figure 8 A schematic structural diagram of a ring bolt according to an embodiment of the present invention is shown.

[0038] Fig. 9 A structural schematic diagram of a lifting ring structure according to an embodiment of the present invention is shown.

[0039] Fig.10 Shows Fig. 9 Right view of .

[0040] Fig.11 A schematic structural diagram of a handle according to an embodiment of the present invention is shown.

[0041] Fig.12 Shows Fig.11 Top view of the .

[0042] Fig.13 A schematic structural diagram of a wristband according to an embodiment of the present invention is shown.

[0043] Fig.14 A schematic structural diagram of a connecting plate according to an embodiment of the present invention is shown.

[0044] Fig.15 A schematic structural diagram of a relief valve pull rod according to an embodiment of the present invention is shown.

[0045] Fig.16 Shows Fig.15 Top view of the .

[0046] Fig.17 Shows Figure 4 Schematic diagram of the B-direction structure.

[0047] Fig.18 A schematic diagram showing the swing angle of the lifting ring when a manual relief operation is performed by pulling the handle by hand according to an embodiment of the present invention.

[0048] Fig.19 A schematic diagram showing the swing angle of the handle when an external force hits the hanging ring according to an embodiment of the present invention.

[0049] Fig. 20 A schematic diagram showing the swing angle of the hanging ring when an external force hits the handle according to an embodiment of the present invention.

[0050] Fig.21A schematic diagram showing the swing angle of a tie rod connection device for a relief valve of a collision-resistant railway freight car along the longitudinal direction of the vehicle according to an embodiment of the present invention.

[0051] Fig. 22 A schematic structural diagram of a railway freight car relief valve tie rod connection device that is impact-resistant according to Embodiment 2 of the present invention is shown.

[0052] Fig.23 Shows Fig. 22 Schematic diagram of the structure of the relief valve pull rope.

[0053] Fig.24 A schematic structural diagram of a railway freight car relief valve tie rod connection device that is impact-resistant according to Embodiment 3 of the present invention is shown.

[0054] Fig.25 Shows Fig.24 NN section view.

[0055] Fig.26 Shows Fig.24 Schematic diagram of the structure of the single connection plate handle.

[0056] Fig. 27 Shows Fig.26 Top view of the .

[0057] Fig.28 Shows Fig.24 Schematic diagram of the structure of the pull rod of the relief valve with ring.

[0058] Fig.29 Shows Fig.28 Top view of the .

[0059] Fig.30 A schematic structural diagram of a railway freight car relief valve tie rod connection device that is impact-resistant according to a fourth embodiment of the present invention is shown.

[0060] Fig.31 Shows Fig.30 Right view of .

[0061] Fig.32 Shows Fig.30 Schematic diagram of the structure of the second base.

[0062] Fig.33 Shows Fig.32 Right view of .

[0063] Fig.34 Shows Fig.30 Schematic diagram of the structure of the chain link in .

[0064] Fig.35A schematic structural diagram of a railway freight car relief valve tie rod connection device that is impact-resistant according to Embodiment 5 of the present invention is shown.

[0065] Fig.36 Shows Fig.35 Right view of .

[0066] Fig.37 Shows Fig.35 Schematic diagram of the structure of the third base.

[0067] Fig.38 Shows Fig.37 Right view of .

[0068] Figures 1 to 3 Description of reference numerals:

[0069] 1', base; 2', hanging seat; 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.

[0070] Figures 4 to 38 Description of reference numerals:

[0071] 1. First base; 1.1. First seat plate; 1.2. First rib plate; 2. Ring bolt; 3. Lifting ring; 4. Handle; 4.1. Hand ring; 4.2. Sleeve; 4.3. Connecting plate; 5. Relief valve pull rod; 5.1. Tail; 5.2. First rod shaft; 5.3. Head; 6. First round pin; 7. First flat washer; 8. First cotter pin; 9. Second flat washer; 10. Self-locking nut; 11. Third flat washer; 12. Elastic washer; 13. Fastening nut; 14. Second cotter pin; 15. Second round pin; 16. Fourth flat washer; 17. Third cotter pin; 18. Relief valve pull rope; 18.1. Wire rope; 18.2. Ring; 19. Relief valve pull rod with ring; 20. Handle of single connecting plate; 21. Second base; 21.1. Second seat plate; 21.2. Hanging plate; 21.3. Second rib plate; 22. Chain link; 23. Third round pin; 24. Fifth flat washer; 25. Fourth cotter pin; 26. Third base; 26.1. Third seat plate; 26.2. Third rib plate; 27. Side beam; 28. Relief valve handle. DETAILED DESCRIPTION

[0072] 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.

[0073] Example 1

[0074] like Figure 4 and Figure 5 As shown, when the base structure of the impact-resistant railway freight car relief valve pull rod connection device is composed of a first seat plate 1.1, a first rib plate 1.2 and a ring bolt 2, the base structure is symmetrically arranged near the lower inner side of the side beams 27 on both sides of the vehicle body chassis, and the left and right sets of relief valve pulling structures adopt relief valve pull rods 5. Except for the inconsistent length, the rest of the structure, size and accessories are exactly the same. The heads of the two relief valve pull rods 5 are installed on the relief valve handle 28 of the 120 type air control valve using a second round pin 15, a fourth flat washer 16 and a third open pin 17.

[0075] like Figure 6 and Figure 7As shown, the first base 1 is an important part of the connection device, which is composed of a first seat plate 1.1 and a rib plate 1.2. In order to improve the strength, rigidity and corrosion resistance of the first seat plate 1.1, minimize the welding workload and reduce the pollution of electric welding smoke, and avoid the occurrence of falling off caused by welding quality problems, the first seat plate 1.1 is made of high-strength, atmospheric corrosion-resistant steel plate bent or pressed into a Z-shaped structure. In order to facilitate the connection with the ring bolt 2 and enable it to be adjusted along the length direction of the vehicle to eliminate the influence of the assembly error of the first base 1 on the device, a longitudinal oblong hole parallel to the side beam is set at the horizontal end of the first seat plate 1.1 facing the inner end of the vehicle; during assembly, the first base 1 is welded to the lower wing edge of the side beam 27 on both sides of the vehicle body frame in the horizontal end facing the outer side, and the first rib plate 1.2 is connected between the side beam web and the first seat plate 1.1, which plays a reinforcing role, so that the first base 1 has sufficient strength and rigidity, meeting the needs of fixing the relevant accessories of the relief valve tie rod connection device and the relief valve tie rod suspension support. The base is made of steel plate that is bent or pressed as a whole and connected to the rib plate as an integral structure. It has a light weight and can be connected by partial segment welding. Compared with the existing suspension seat, it reduces the welding workload and reduces the pollution of electric welding smoke. It solves the problem that the existing relief valve tie rod suspension seat and the base are heavy and are connected by full welding during assembly. Due to the large number of welds, the probability of defects such as cracks and open welding at the welding joint is high, which affects the strength of the suspension seat and is easy to cause driving safety accidents. In addition, the base adopts an overall corrugated structure of high-strength thick-walled steel plates that are resistant to atmospheric corrosion, which improves its corrosion resistance, strength and rigidity, extends its service life and maintenance cycle, improves reliability and safety performance, and reduces maintenance costs. It solves the problem that the existing relief valve rod hanger and base are made of ordinary materials and their strength and rigidity are insufficient to support the combined force of the 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 and the base; at the same time, it solves the problem that the existing base and hanger need to be removed during factory repair due to severe corrosion, and new parts need to be added during assembly, affecting maintenance costs and efficiency.

[0076] like Figure 8As shown, the ring bolt 2 is made of round steel, and mainly consists of an upper screw portion and a lower circular ring portion. A split pin hole is set in the upper screw portion. If the diameter of the round steel is relatively large, the closed opening of the lower circular ring portion can be connected without welding. The ring bolt 2 mainly connects the first base 1 and the lifting ring 3, and enables the lifting ring 3 to swing flexibly around its lower circular ring portion in the horizontal and longitudinal direction of the vehicle body within a certain range. In addition, the lower circular ring portion also plays the following roles: (1) When assembling and tightening the upper screw portion and the nut of the ring bolt 2, the lower circular ring portion can be clamped with a wrench or other tools to prevent the screw from rotating, which is convenient for adjustment and the opening of the lower circular ring portion is directed toward the side beam 27 or parallel to the side beam; (2) The inner diameter of the lower circular ring portion must be set to a circular hole larger than the diameter of the shaft of the lifting ring 3. When an external force hits the lifting ring 3, the upper circular ring of the lifting ring 3 can move vertically upward within the gap distance relative to the lower circular ring portion, which can buffer the impact of the external force on the lifting ring 3. If the vertical position of the handle 4 does not meet the requirements, the upper end screw portion of the ring bolt 2 and the position of the upper and lower nuts can be slightly adjusted, so the ring bolt 2 has a certain range of fine adjustment function, but it must be ensured that the lower part of the ring bolt 2 does not exceed the lower wing edge of the side beam 27 after assembly to prevent it from being damaged by external forces. In order to facilitate assembly and improve appearance performance, the opening of the lower end circular ring portion of the ring bolt 2 faces the side beam 27 or is parallel to the side beam 27 after assembly. During assembly, first, the second flat washer 9 and the self-locking nut 10 are sequentially arranged on the upper screw portion of the ring bolt 2 below the first seat plate 1.1, which mainly play the role of vertically limiting the screw and preventing the nut from loosening. Then, the third flat washer 11, the elastic washer 12, and the fastening nut 13 are sequentially assembled on the upper screw portion of the ring bolt 2 above the first seat plate 1.1, which play the role of positioning, fixing and preventing the ring bolt and the nut from loosening. In order to avoid the accident that the fastening nut loosens due to the shaking of the vehicle and causes the ring bolt to fall off and affect driving safety, after the ring bolt 2 is assembled, the second cotter pin 14 is inserted into the hole of the upper screw portion, and the tail of the cotter pin is split at a certain angle.

[0077] like Fig. 9 and Fig.10 As shown, the lifting ring 3 is an integrated structure of an upper ring, a rod and a lower ring made of round steel of a certain diameter, which mainly serves to connect the ring bolt 2 and the handle 4, and under the premise of ensuring normal manual operation of the relief valve, it has the function of swinging along the vehicle body in the horizontal and longitudinal directions within a certain range when it and the handle 4 collide with external forces or interfere with other forces. When the lower end ring portion of the ring bolt 2 opens toward the side beam 27 after assembly, the opening directions of the upper ring and the lower ring are vertically arranged, and when the lower end ring portion of the ring bolt 2 opens parallel to the side beam 27, the opening directions of the upper ring and the lower ring are parallelly arranged. The length of the rod is set according to the structural requirements. When the diameter of the round steel is relatively large, since the upper ring and the lower ring have sufficient strength and rigidity, the closed openings of the upper ring and the lower ring can be fixed without welding.

[0078] like Fig.11 and Fig.12 As shown, the handle 4 is composed of a wristband 4.1, a sleeve 4.2 and two symmetrically arranged connecting plates 4.3, which mainly connects the lifting ring 3 and the relief valve pull rod 5, and is convenient for holding the hand to perform manual relief operation of the vehicle. In addition, when an external force hits, there is a certain connection activity gap to facilitate buffering the impact force.

[0079] like Fig.13 As shown, the wristband 4.1 is made of round steel with a diameter of φF, which is bent into a runway-shaped closed ring structure with a radius of R at both ends and a straight section length of L in the middle. In order to reduce the weight of the wristband, the diameter of the round steel used to make the wristband 4.1 is as small as possible without affecting the strength and rigidity. When assembled on the vehicle, the opening direction of the wristband 4.1 is parallel to the side beam 27 (or along the length direction of the vehicle), and the arc part of the wristband 4.1 is assembled vertically. In order to improve assembly efficiency and quality, the upper arc of the wristband 4.1 can be connected to the lower ring of the hanging ring under the vehicle in advance.

[0080] In order to facilitate manual operation and improve the humanization level, and to prevent the wristband 4.1 from being strangled by excessive pressure when the wristband 4.1 is pulled by hand to operate the straight section contact surface, a sleeve 4.2 with a certain outer diameter is inserted into the straight section facing the outside of the vehicle before the wristband 4.1 is bent. The sleeve 4.2 is made of a round tube with a certain wall thickness and outer diameter, which is less than the length of the straight side of the wristband and has an inner diameter greater than the diameter of the wristband round steel. The round tube can be made of steel pipe or nylon and other materials. After the wristband 4.1 is assembled with the lifting ring 3, under the action of the self-weight of the connecting plate 4.3 assembled on the wristband 4.1 and the relief valve pull rod 5 hinged thereto, and after overcoming the friction generated by the upper arc of the wristband 4.1 rotating on the contact surface of the lower ring of the lifting ring 3, the upper arc of the wristband 4.1 will rotate around the contact surface with the lower ring of the lifting ring 3 as a fulcrum until it is balanced. At this time, the lower part of the wristband 4.1 is inclined at a certain angle toward the outside of the vehicle body. Therefore, by adjusting the length and wall thickness of the sleeve 4.2, the above-mentioned eccentric force is also balanced, and the upper and lower arcs of the wristband 4.1 are kept in a vertical state, which can ensure the assembly size of the relief valve pull rod 5 and improve the appearance quality and performance of the invention.

[0081] After the contact surface between the upper arc of wristband 4.1 and the lower ring of lifting ring 3 is worn beyond the limit, in order to save costs, the handle can be turned upside down before continuing to use. After removing the round pin that hinges the handle and the tail of the relief valve tie rod, pass the lower ring of the lifting ring through the sleeve set on the straight section outside the handle, then remove the split pin and loosen the fastening nut to adjust the rotation of the lower ring of the ring bolt connected to the lifting ring. Rotate 180° on the base so that the connecting plate faces the inside of the car, then tighten the nut and assemble the split pin. Finally, insert the flat end of the tail of the relief valve tie rod between the connecting plates on the handle, and then use the round pin, washer and split pin to complete the assembly. If the open end of the lower ring of the lifting ring adopts a gap connection, the lower ring of the lifting ring can also be disassembled to a certain degree by using a wrench or other tools, and then pass through the lower ring of the handle, and then the ring is closed and connected. The assembly and disassembly sequence of the relief valve tie rod is the same as above.

[0082] like Fig.14 As shown, the connecting plate 4.3 is made of steel plate and processed into a triangular arc structure, and a horizontal oblong hole connected to the first round pin 6 is set in the center of the connecting plate 4.3. The connecting plates 4.3 are symmetrically arranged in pairs on both sides of the center of the straight section of the hand ring 4.1 facing the inner end of the vehicle, and the oblong holes on both sides are aligned, and the distance between the inner sides of the two connecting plates 4.3 is ensured before they are connected by electric welding. The function of the horizontal oblong hole set in the center of the connecting plate 4.3 is: when an external force hits the handle, the handle 4 swings a certain distance into the vehicle, and at the same time, the round pin that hinges the handle 4 and the relief valve pull rod 5 can move a certain distance, so it can buffer the impact of the external force and prevent the handle from deforming due to impact.

[0083] The handle 4 is welded under the vehicle and then connected to the lifting ring 3, avoiding the welding defects existing after the existing vehicle fasteners are assembled and spot-welded and the occurrence of over-electric pitting corrosion accidents caused by improper operation, and the problem that the spring of the relief valve or the bearing on the bogie is over-electrically corroded, affecting the braking relief or operation of the railway freight car and bringing hidden dangers to driving safety. The relief valve pull rod 5 of the closed runway-shaped annular connection structure handle 4 replaces the existing relief valve pull rod trapezoidal closed welding handle and the rivet connection fastening structure used in the suspension, and has the advantages of simple assembly and maintenance process, good economy, high efficiency and low cost.

[0084] like Fig.15 and Fig.16 As shown, the relief valve pull rod 5 is composed of a tail 5.1, a first rod 5.2 and a head 5.3. In order to facilitate production and manufacturing and reduce procurement costs, the relief valve pull rod 5 is still made of round steel with a diameter of 10 mm used in existing trucks. The tail 5.1 and the head 5.3 are both flat structures in the shape of an arc and a round through hole is respectively set at the center of the arc. The flat end of the tail can be set longer than the head end as needed.

[0085] The flexible sliding limiting structure of the handle 4 and the relief valve rod 5 reduces the wear of the contact surface, avoids the wear of the relief valve rod body of the existing vehicle, extends the service life and maintenance cycle of the relief valve rod, improves the maintenance efficiency of the relief valve rod, reduces the maintenance cost and improves the safety performance, and solves the problem of abnormal wear of the contact part between the existing relief valve rod handle and the L-shaped anti-detachment plate, causing the relief valve rod handle to break, affecting driving safety, maintenance cost and maintenance efficiency.

[0086] The handle 4, the lifting ring 3, the relief valve pull rod 5, etc. are equipped with a hinged limiting structure, which avoids the problems of existing rivets or spot welding after fastener assembly, and will not damage the accessories and mounting holes during disassembly. It has the advantages of simple disassembly, high efficiency and low cost, and solves the problem that the mounting holes may be easily burned when the mounting bolts or rivets are cut before disassembling the relief valve pull rod for maintenance, resulting in the need to weld and process the holes of the L-shaped anti-slip plate and the suspension seat or scrapping, resulting in high maintenance costs.

[0087] In order to reduce the wear and friction resistance of the handle 4 and the relief valve rod 5, facilitate the limiting of the handle 4 and the relief valve rod 5, improve their own wear resistance and enable the handle 4 and the relief valve rod 5 to move flexibly under the action of manual or relief valve handle 28 restoring force, the connection method between the handle 4 and the lifting ring 3, and the lifting ring 3 and the ring bolt 2 can all be synchronized and freely swung, and each synchronized swinging contact part adopts a connection method mainly based on sliding or rolling friction. Compared with the existing vehicle's relief valve rod that moves horizontally along the vehicle body in a sawing-like structure, the wear of the relief valve rod is correspondingly reduced, the service life of the relief valve rod and its accessories is extended, the replacement frequency is reduced, the manufacturing and repair cost is reduced, and the inspection and replacement are convenient.

[0088] Under the premise of not affecting the connection functions and the rotation of the head 5.3 of the relief valve tie rod 5, round pins, washers and cotter pins are used to connect the head 5.3 of the relief valve tie rod 5 assembled on both sides and the relief valve handle 28 into an integrated anti-detachment structure, which improves the anti-detachment safety performance of the head and avoids the occurrence of the existing relief valve tie rod 5 head 5.3 falling off due to excessive wear of the round hole. The use of round pins to replace the existing cotter pin connection structure not only improves the shear force on the pin shaft, but also reduces the wear of each connection hole and round pin. In subsequent maintenance, if the round pin is worn beyond the limit, only the round pin needs to be replaced, which improves the maintenance efficiency and reduces the maintenance cost. The problem of the relief valve tie rod falling off and losing when the round hole of the head of the existing relief valve tie rod facing the inside of the vehicle is solved.

[0089] Since the 120-type 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 are installed on the valve, in order to facilitate manual pulling of the relief valve rod on both sides of the car body chassis to operate the relief valve, the first rod body 5.2 of the relief valve rod still adopts a Z-shaped structure with inconsistent lengths on the left and right and a certain height difference.

[0090] like Figure 4 and Fig.17 As shown, during assembly, the flat end of the tail 5.1 of the relief valve tie rod 5 is inserted between the connecting plates 4.3 of the handle 4, and the round through hole set at the flat end of the tail 5.1 of the relief valve tie rod 5 is adjusted and aligned with the round through hole set on the connecting plate 4.3, and then the first round pin 6, the first flat washer 7 and the first cotter pin 8 are hinged, and then the flat end of the head 5.3 of the relief valve tie rod 5 is inserted into the assembly groove of the relief valve handle 28, and the round through hole set at the flat end of the head 5.3 of the relief valve tie rod 5 is adjusted and aligned with the round through hole of the relief valve handle 28, and then the second round pin 15, the fourth flat washer 16 and the third cotter pin 17 are hinged, and after assembly, the tail of each cotter pin is split at an angle of 60°. In addition, during assembly, the assembly order of the tail 5.1 and the head 5.3 of the relief valve tie rod 5 can be adjusted according to actual conditions.

[0091] like Fig.18 As shown, the anti-collision railway freight car relief valve rod connection device will not affect the manual relief function. When the handle 4 on one side of the car body is pulled, the handle 4 on this side drives the lifting ring 3 connected to the upper arc thereof to swing around the upper ring of the lifting ring 3 and the lower end ring part of the ring bolt 2 to the outside of the car at a certain angle a°. At the same time, through the round pin hinged at the relief valve handle 28 connected to the relief valve rods 5 on both sides, the handle 4 on the other side can be pulled to drive the lifting ring 3 connected to it to swing around the lower end ring part of the ring bolt 2 to the inside of the car at a certain angle a°, which will not affect the function of the relief valve to be manipulated on either side. After the manual operation is canceled, the handles on both sides respectively drive the lifting rings and relief valve rods connected thereto to make reverse swinging motions under the action of their own weight and the restoring force of the relief valve handle reset spring, until the handles 4 on both sides, the lifting rings 3, the relief valve rods 5 and the relief valve handle 28 connected in the middle are all in a drooping balanced and stable state. Because the relief valve handle 28 can pull the relief valve pull rods 5 hingedly connected to it on both sides under the action of its reset spring, the relief valve handle 28 can be quickly reset without affecting the vehicle's braking and relief performance.

[0092] like Fig.19 and Fig. 20As shown, when the vehicle is hit by external forces from the outside of the vehicle such as cargo, loaders and forklifts during loading and unloading, since the ring bolt 2 does not extend beyond the lower wing edge of the side beam, the external force can only hit the two accessories of the lifting ring 3 and the handle 4. If the external force hits the lifting ring 3, the lifting ring 3 drives the handle 4 connected below to rotate along the contact surface between its upper part and the circular ring part of the lower end of the ring bolt 2 and swing horizontally to the inside of the vehicle at a certain angle b°. At this time, the connecting plate 4.3 on the handle 4 is provided with an oblong hole, which is relative to the relief valve pull rod. 5 is hingedly moved laterally for a distance into the vehicle to relieve the indirect damaging effect of the external force collision on the handle 4 and the relief valve pull rod 5; if the external force hits the handle 4, the handle 4 drives the upper connected ring 3 to rotate along the contact surface between the upper ring of the ring and the lower end ring part of the ring bolt 2 and swing laterally to the vehicle at a certain angle c°. In addition, there is a certain gap between the upper arc of the handle 4 and the lower ring of the ring 3, so that the handle 4 can also swing up and down, front and back and in other directions relative to the ring 3. The above-mentioned lifting ring 3 and handle 4 have the function of swinging toward the inside and outside of the vehicle. When loading and unloading goods, the collision kinetic energy generated by the external force such as the loader on one side is converted into the potential energy of the lifting ring 3 and the handle 4 swinging toward the inside of the vehicle at a certain angle with the same initial velocity generated when the external force collides, and the potential energy of the relief valve rod 5, the lifting ring 3 and the handle 4 on the other side connected by the relief valve rod 5 and the relief valve handle 28 swinging toward the outside of the vehicle at the same angle, and the elastic potential energy generated by the restoring spring at the relief valve handle; after the external force is cancelled, the lifting ring 3 and the handle 4 and the relief valve rod 5 on both sides are restored to the initial drooping and relatively stable equilibrium state under the joint action of their own weight and the restoring force generated by the restoring spring at the relief valve handle; if the above-mentioned collision external force is not directly against the side beam of the chassis, but hits at a certain angle, the invention still has a certain adjustment range and collision buffering function. The lifting rings 3 and handles 4 on both sides can swing and rotate toward the inside and outside of the vehicle, and the two can also overcome the connection gap to achieve a flexible connection function that allows relative movement up and down, front and back, and in other directions, thereby avoiding deformation or damage caused by direct impact from external forces and improving railway transportation safety.

[0093] like Fig.21As shown, the connection between the relief valve rod 5 and the handle 4, the handle 4 and the lifting ring 3, and the lifting ring 3 and the ring bolt 2 can all swing freely, and each swing contact part adopts a connection method mainly based on sliding or rolling friction. The synchronous swinging function of the relief valve rod and the handle is compared with the relief valve rod of the existing vehicle that moves with its bracket in a sawing manner along the lateral direction of the vehicle body, which correspondingly reduces the wear of the relief valve rod, prolongs the service life of the relief valve rod and its accessories, reduces the replacement frequency, and the relief valve rod 5, the handle 4 This flexible connection structure of the lifting ring 3 can produce micro-adjustments. When assembly and manufacturing errors cause the relief valve rod 5 to be out of alignment, when the handle 4 is pulled, under the action of the horizontal component of the external force of the out-alignment, the handle 4 drives the relief valve rod 5 through the lifting ring 3 connected to its upper part to swing forward or backward along the longitudinal direction of the vehicle at a certain angle d° around the lifting ring 3 and the circular ring part at the lower end of the ring bolt 2 until the force balance is reached. This can avoid the occurrence of existing out-alignment and solve the problem of the out-alignment of the existing structure causing effort and difficulty in pulling.

[0094] In addition, the relief valve pull rod 5 does not need to be connected with fasteners, which avoids the problems of the existing vehicle depots 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 rings to connect and prevent falling off, such as the installation of special rivets, rings or bolts and nuts cannot be reused, the manufacturing and maintenance costs are high, and the overall economic benefits are poor; since the movable parts of the connecting device are not connected or spot-fastened by electric welding in subsequent maintenance, the existing steel relief valve pull rod handle is completely solved. When the existing steel relief valve pull rod is assembled with welding or bolts, nuts and other fasteners and then connected with electric welding for spot welding instead of rivets and rings, when the line is improperly processed, there is a problem of pitting corrosion of the relief valve and the bogie bearing due to the passage of current, which affects driving safety.

[0095] If there is a large assembly error in the longitudinal direction of the vehicle body after the first base 1 is installed, the installation position of the ring bolt 2 in the longitudinal oblong hole of the first seat plate 1 can be adjusted longitudinally; if there is a large assembly error in the vertical direction of the vehicle body after the first base 1 is installed, the distance between the upper end screw part of the ring bolt 2 and the installation hole of the first seat plate 1.1 can be adjusted by adjusting the upper and lower nut positions of the ring bolt 2, which indirectly ensures the installation size of the handle 4 and the relief valve rod 5; if there is a large assembly error in the lateral direction of the vehicle body after the first base 1 is installed, the round pin hinged between the handle 4 and the relief valve rod 5 can produce a certain range of adjustment movement in the lateral direction in the oblong hole set in the connecting plate 4.3. Through the adjustment functions in the above three directions, the influence of the assembly errors of the first base 1, the relief valve rod 5 and each connecting part on the device can be eliminated. When operating the impact-resistant railway freight car relief valve rod connection device, when pulling the relief valve rod 5 on one side, the relief valve rod 5 on the other side can be driven to move through the round pin hinged at the relief valve handle 28 connected to the relief valve rods 5 on both sides, without affecting the function of the relief valve being manipulated on either side, and after the manual operation is canceled, the relief valve handle 28 can pull the relief valve rods 5 hingedly connected to it on both sides under the action of its reset spring so that the relief valve handle 28 can be quickly reset, without affecting the vehicle's braking and relief performance.

[0096] The ring bolt 2 is connected to the longitudinal oblong hole of the first base 1 through the upper end screw portion, and has the function of adjusting the position in both longitudinal and vertical directions. If the assembly size error of the relevant accessories in the vertical and horizontal longitudinal directions is relatively large, the vertical and longitudinal connection position between the ring bolt 2 and the first base 1 can be adjusted so that the handle 4 and the relief valve pull rod 5 can be adjusted to the ideal size position, thereby reducing unnecessary rework and repair, thereby improving the assembly quality and efficiency of the invention.

[0097] The impact-resistant railway freight car relief valve tie rod connection device has a light weight, which is conducive to meeting the lightweight design requirements of railway freight cars. The device has a simple structure, and the first base is manufactured by bending or pressing high-strength, corrosion-resistant steel plates, which is convenient for batch production. The weight of each connected accessory is smaller than that of existing vehicles, so compared with existing vehicles, the base bearing capacity of the invention is reduced, the weight is lighter, the structure is simpler, and it is easy to manufacture, with high reliability, and will not affect the assembly and maintenance of other components.

[0098] The device also meets the requirements of anti-loosening and anti-falling. The disassembly and assembly tools of the relief valve rod and the connecting device are easy to carry, and can meet the requirements of field operations without large tools. The device is easy to manufacture, maintain, and inspect, and meets the requirements of high reliability and high safety. The various accessories of the relief valve rod connecting device have a relatively small weight, and flexible connections are used between the accessories to achieve synchronous swing and relative rotation. A linear contact friction structure with sliding friction as the main feature is adopted at each active contact point. Combined with the application of lubricating oil on each contact surface, the friction resistance of each rotating part can be reduced, and the wear of the connecting contact surfaces between the accessories can be reduced. The maintenance period of each accessory can be extended, and the maintenance cost can be reduced. It will not affect the components and usage functions of the device, and is convenient for factories and vehicle depots to install, modify and repair existing railway freight cars.

[0099] In addition, the structure of the impact-resistant railway freight car relief valve tie rod connection device is symmetrical, has good force bearing capacity, high strength, high rigidity, good processability, is easy to manufacture and maintain, and is easy to assemble and disassemble. It has good economy and a high reuse rate during maintenance, which can effectively reduce procurement and transportation costs, is beneficial to improving assembly quality, and saves manufacturing and maintenance costs. It has the characteristics of high assembly and disassembly efficiency, low cost, good economy, aesthetics, and high degree of commercialization. It effectively solves the problems of low assembly and disassembly efficiency and high manufacturing and repair costs of the relief valve tie rods of existing vehicles.

[0100] This embodiment also provides a railway vehicle, including: a 120-type air control valve and a relief valve, which are arranged on one side of the center beam of the railway vehicle, and a relief valve handle is arranged on the relief valve; the above-mentioned railway vehicle relief valve pull rod mounting hanger device; two pull rod mounting mechanisms are provided, and the two pull rod mounting mechanisms are symmetrically arranged and respectively connected to the two side beams of the railway vehicle; two relief valve pulling structures are provided, and the lengths of the two relief valve pulling structures are different.

[0101] Example 2

[0102] like Fig. 22 and Fig.23As shown, the relief valve pulling structures of the left and right sets in the connection device use flexible relief valve pull ropes 18 to replace the relief valve pull rods in Example 1, and the other accessories still use the same accessories as in Example 1. The relief valve pull rope 18 is mainly composed of a steel wire rope 18.1 of a certain length and rings 18.2 at both ends. The steel wire rope 18.1 is a stainless steel wire rope with a diameter of φ3mm-φ3.5mm, which has strong corrosion resistance, high tensile strength, good fatigue resistance and long service life. Since the assembly position of the relief valve is biased towards one side of the vehicle chassis, the lengths of the relief valve pull ropes 18 on both sides are inconsistent. The collar 18.2 is replaced by a double-hole 8-shaped aluminum sleeve or a stainless steel pipe; when the relief valve pull rope 18 is made, the collars 18.2 at both ends are first inserted into the vicinity of the two ends of the wire rope 18.1, and then the two ends of the wire rope 18.1 are respectively wound back into closed loops and inserted into the holes of the collars 18.2 inserted in advance, and then the end length of the wire rope 18.1 is adjusted so that the end of the wire rope 18.1 is exposed from the collar for a distance, and finally the collar is clamped or flattened with special tools such as pliers, so that the wire rope 18.1 is fixedly connected to the collars 18.2 at both ends as an integrated structure; during assembly, the closed rings at both ends of the relief valve pull rope 18 are respectively connected to the oblong holes of the connecting plate 4.3 on the handle 4 and the round holes of the relief valve handle 28 by round pins, washers and cotter pins. For example, when operating the manual relief valve of the vehicle, the relief valve pull rope 18 is driven by the handle to pull the relief valve handle 28 to swing, so as to realize the function of the existing relief valve pull rod to pull the relief valve handle outward to release the brake valve. In this way, the impact resistance of the device can be further improved, and the weight of the relief valve pull rod can be reduced, machining can be avoided, and the manufacturing and repair costs can be reduced. The relief valve pull rope 18 adopts a flexible steel wire rope 18.1 connected between the handle 4 and the relief valve handle 28, and has a certain amount of slack, which will produce a certain range of up and down and left and right swinging movements, so the structure will not have a stuck phenomenon. It solves the problem that the existing relief valve pull rod is stuck after manual relief, resulting in the inability to reset the relief valve handle, causing poor braking and relief failures of railway freight cars, and also avoids the machining of the relief valve pull rod, improves the manufacturing and repair efficiency, reduces costs, and has a light weight and can further reduce the weight of the vehicle.

[0103] Example 3

[0104] like Figure 24 to Figure 29As shown, the connection device adopts a relief valve rod 19 with a ring and a handle 20 with a single connection plate to replace the relief valve rod 5 and the handle 4 in Example 1 respectively, and the other accessories are still the same accessories as in Example 1. The relief valve rod 19 with a ring is connected to the oblong hole on the connection plate 4.3 by a horizontally arranged circular ring. When the relief valve rod 19 adopts a relatively large diameter and the circular ring has a certain strength and rigidity, the circular ring of the relief valve rod 19 can be closed or not connected by electric welding; the single connection plate handle adopts a single connection plate welded to the straight section of the hand ring 4.1 facing the inside of the vehicle and the horizontal and vertical center line of the side facing the inside of the vehicle, and then connected by electric welding; the rest of the structure and size of the relief valve rod 19 with a ring and the single connection plate handle are the same as those in Example 1.

[0105] Example 4

[0106] like Fig.30 and Fig.34 As shown, the second base 21, chain link 22, third round pin 23, fifth flat washer 24 and fourth cotter pin 25 are used in the connection device to replace the base, ring bolt and fastener in embodiment 1 respectively, and the other accessories are still the same accessories as those in embodiment 1. The second base 21 is composed of a second seat plate 21.1, a hanging plate 21.2 and a second rib plate 21.3. The second seat plate 21.1 is made of a steel plate bent into an L-shaped structure, and a round through hole is provided at the lower end of its short end. The hanging plate 21.2 with the round through hole is used to have an inner distance dimension E with the short end of the second seat plate 21.1 and the two round through holes are aligned, and the hanging plate 21.2 is welded to the long end of the second seat plate 21.1, and then the second rib plate 21.3 is used to assemble on the center line of the inner side of the second seat plate 21.1 and the hanging plate 21.2. At this time, the second base is completed. The second rib plate 21.3 mainly plays the role of strengthening the second seat plate 21.1 and the hanging plate 21.1 and positioning the height of the second base. When assembling the second base, the center lines of the two prefabricated base holes are aligned with the corresponding line centers of the side beams of the chassis on both sides of the vehicle, and then the second seat plate 21.1 and the second rib plate 21.3 of the second base are spot welded to the inner web and lower wing edge of the side beam respectively by electric welding, and finally the welding is completed. The chain ring 22 is made of round steel and made into a long ring structure with a certain length, and the interface of the chain ring 22 is connected by electric welding, which improves its safety performance. In order to prevent damage by external force, the lower part of the chain ring 22 shall not exceed the lower wing edge of the side beam during assembly. The arc at one end of the chain ring 22 is connected to the lifting ring 3, and the other end of the chain ring 22 is hinged to the circular hole of the base by the third round pin 23, the fifth flat washer 24 and the fourth cotter pin 25. Under the premise of ensuring the normal manual relief operation of the vehicle, the above structure has the function of flexible swinging along the vehicle body in the horizontal and longitudinal directions within a certain range when the lifting ring and the handle are collided with external forces or interfered with by other forces.

[0107] Example 5

[0108] like Figures 35 to 38 As shown, the connection device adopts a third base 26 directly connected to the lifting ring 3 to replace the connection structure of the base, ring bolts and fasteners with the lifting ring in the embodiment, and the remaining accessories are still the same as those in embodiment 1. The third base 26 is mainly composed of a third seat plate 26.1 and a third rib plate 26.2. The third seat plate 26.1 is made of a high-strength thick-walled steel plate resistant to atmospheric corrosion and bent into an L-shaped structure. The short end of the third seat plate 26.1 is located in a drooping position. In order to facilitate connection with the lifting ring, a round through hole connected to the lifting ring is arranged at the short end of the third seat plate 26.1. The long end of the third seat plate 26.1 is in a horizontal position. The third rib plate 26.2 is connected to the inner center line of the short end and the long end of the third seat plate 26.1 of the base, mainly playing the role of strengthening the third seat plate 26.1 and positioning the height of the third seat plate 26.1. When the third seat plate 26.1 is assembled, the center lines of the round holes of the two prefabricated third seat plates 26.1 are respectively aligned with the corresponding marking centers of the side beams of the chassis on both sides of the vehicle, and then the third seat plate 26.1 and the third rib plate 26.2 are respectively spot-welded to the inner web of the side beam and the lower wing edge by electric welding, and finally the welding is completed. However, this solution is only applicable when the diameter of the round steel used to make the lifting ring is relatively large, and the closed open ends of the rings at both ends of the lifting ring cannot be connected by welding, but when a small gap is used to connect, it has sufficient strength and rigidity to support the hanging of various accessories, and the closed ring can be manually opened or restored with simple tools such as pliers and wrenches. Compared with Example 1, this embodiment simplifies the structure, reduces the number of accessories, improves assembly efficiency, and reduces manufacturing and repair costs without affecting its anti-collision, anti-interference and use functions.

[0109] In addition, in order to improve the versatility and interchangeability of parts and components and reduce manufacturing and maintenance costs, the round pins, washers and cotter pins in the impact-resistant railway freight car relief valve tie rod connection device use standard parts, which improves the vehicle manufacturing and repair efficiency while reducing the vehicle manufacturing and repair costs, and eliminates the hidden danger of the existing vehicle relief valve tie rod and hanger falling off and affecting driving safety.

[0110] The device is designed as a symmetrical structure, which improves the processability and aesthetics. At the same time, the relief valve pulling structure in the device is connected to the relief valve handle in the same way as the existing vehicle, which improves the assembly efficiency of the relief valve pulling structure and reduces the manufacturing cost. The base structure in the device adopts a profiled structure with a very small amount of welding, which is light in weight. It is more convenient to assemble and position than the relief valve pull rod hanger of the existing vehicle, with high efficiency and low cost. It avoids the occurrence of cracks and detachments caused by existing welding quality defects, reduces welding workload, welding strength and cost, avoids environmental pollution caused by a large amount of welding smoke, and improves the working environment of assembly workers.

[0111] The installation steps of the impact-resistant railway freight car relief valve tie rod connection device of the structure of Example 1 are as follows: first, the two ends of the manufactured lifting ring 3 are respectively passed through the lower end circular ring portion of the ring bolt 2 and the upper arc of the handle 4, and then the two ends of the lifting ring 3 are bent into a closed circular ring structure to form an upper circular ring and a lower circular ring. If the diameter of the round steel is relatively large and the circular ring has sufficient strength and rigidity to withstand the lower hanging accessories, the closed mouth of the circular ring can be connected without electric welding. At this time, the connection and assembly of the ring bolt 2, the lifting ring 3 and the handle 4 are completed; then the first bases 1 on both sides are placed close to the lower wing edge and the web corresponding to the side beam, so that the center of the oblong hole on the first seat plate 1.1 is aligned with the corresponding line on the side beam along the transverse center line of the vehicle body chassis, and the end and lower side of the first seat plate 1.1 are respectively welded to the inner web and the lower wing edge of the side beam 27 to form an integrated structure; then the upper end screw rod part of the ring bolt 2 is screwed into the self-locking nut 10 and the second flat washer 9 in sequence, and then passed under the oblong hole of the first seat plate 1.1, and then the third flat washer 11, the elastic washer 12, and the fastening nut 13 are assembled on the upper end screw rod part in sequence, and the horizontal longitudinal position of the handle 4 along the vehicle is indirectly adjusted by moving the upper end screw rod part of the ring bolt 2 in the direction of the oblong hole on the first seat plate 1.1, and then the vertical position of the handle 4 is indirectly adjusted by rotating the lower end circular ring part on the ring bolt 2. After the adjustment is appropriate, each nut is tightened, and finally the handle 4 is tightened. After the second cotter pin 14 is passed through the circular hole of the upper end screw portion of the ring bolt 2, its tail is split to an angle of 60°; then the tail 5.1 of the relief valve pull rod 5 is converted into a flat end and inserted between the connecting plates 4.3, and the round through hole set at the flat end of the tail of the relief valve pull rod 5 is aligned with the round through hole set on the connecting plate of the handle 4, and after adjustment and alignment, the first round pin 6, the first flat washer 7 and the first cotter pin 8 are used for hinge connection, and then the heads of the relief valve pull rods 5 on both sides are converted into flat ends and inserted into the assembly groove of the relief valve handle 28 at the same time, and the round through hole set at the flat end of the head of the relief valve pull rod 5 is adjusted to align with the round through hole of the relief valve handle 28, and the second round pin 15, the fourth flat washer 16 and the third cotter pin 17 are used for hinge connection, and after assembly, the tail of each cotter pin is split to an angle of 60°. In addition, during assembly, the assembly order of the tail 5.1 and the head 5.3 of the relief valve pull rod can be adjusted according to actual conditions. At this time, the assembly of the relief valve pull rod connecting device has been completed.

[0112] In order to improve the assembly efficiency of the whole vehicle line, the ring bolt 2, the lifting ring 3, the handle 4, the tail 5.1 of the relief valve rod 5, the first round pin 6, the first flat washer 7 and the first cotter pin 8 can be assembled in advance in the process under the vehicle. After the assembly under the vehicle is completed, the heads 5.3 of the relief valve rods 5 on both sides are inserted into the assembly grooves of the relief valve handle 28 at the same time, and the round through holes set at the flat ends of the heads of the relief valve rods 5 on both sides are adjusted to align with the round through holes of the relief valve handle 28, and then the second round pin 15, the fourth flat washer 16 and the third cotter pin 17 are used for hinge connection, and then the relief valve rods 5 are assembled with the lifting ring 3. The upper end screw of the ring bolt 2, which is connected as one with the ring 3, the handle 4 and the tail of the relief valve pull rod 5, is screwed into the self-locking nut 10 and the second flat washer 9 in sequence, and then passes through the bottom of the oblong hole of the first seat plate. Then, the third flat washer 11, the elastic washer 12, and the fastening nut 13 are assembled in sequence on the upper end screw. After the ring bolt 2 is properly adjusted in the vertical and longitudinal directions, the ring bolts 2 on both sides are assembled on the corresponding first base 1 and fastened. Finally, a split pin is used to pass through the split pin hole set at the end of the upper end screw of the ring bolt 2 and then the tail is split 60°. The installation steps of the structure of the connection device in Example 2 are basically the same as those in Example 1.

[0113] The installation steps of the connection device of the structure of Example 3 are as follows: when the closed ring mouth of the tail of the ring relief valve rod 19 is not connected by electric welding but by clearance fit, the closed ring is manually opened with simple tools such as pliers and wrenches to make it an opening of a certain width, and the closed ring is manually restored after the open end is inserted into the oblong hole on the single connecting plate on the handle 4; if the closed ring mouth of the tail of the ring relief valve rod 19 needs to be connected by electric welding, it is necessary to pass the tail ring through the oblong hole of the single connecting plate on the handle 4 in advance before manufacturing, and then bend the ring and seal the port by welding. The rest of the assembly and disassembly process of this scheme is basically the same as that of Example 1.

[0114] The installation steps of the connecting device of the structure of embodiment 4 are as follows: the ring bolt 2 is replaced by the chain ring 22, one end of which is connected to the second base 21 by the third round pin 23, the fifth flat washer 24 and the fourth cotter pin 25, and the other end is closed and connected to the lifting ring 3. The rest of the assembly and disassembly process of this scheme is basically the same as that of embodiment 1.

[0115] The installation steps of the connection device of the structure of Example 5 are as follows: after manually opening the upper ring of the lifting ring 3 with a gap of a certain opening with simple tools such as pliers and a wrench, pass its end through the round hole of the third base, and finally restore the upper ring of the lifting ring 3 with simple tools such as pliers and a wrench. The rest of the assembly and disassembly process of this scheme is basically the same as that of Example 1. The anti-impact railway freight car relief valve tie rod connection device is easy to use and maintain, has high efficiency, light weight, and low manufacturing and repair costs. It adopts a flexible connection method to prevent deformation and damage caused by external force impact, so it has good safety. It not only solves the problems of the existing relief valve hanger and relief valve tie rod, but also solves the existing driving safety problems caused by the untimely handling of the faulty car.

[0116] 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. An impact-resistant railway freight car relief valve tie rod connection device, characterized in that: include: At least one pull rod installation mechanism, the pull rod installation mechanism includes a base structure and a handle, the base structure is connected to the inner side of the side beam of the vehicle body, the handle includes a hand ring, the hand ring is oblong, the hand ring is connected to the base structure through a hanging ring, and the handle can be driven to swing along the longitudinal direction and the transverse direction of the vehicle body through the hanging ring; At least one relief valve pulling structure, one end of which is sleeved on the side of the handle, and the other end of which is hinged to the relief valve handle; The hanging ring comprises an upper ring, a rod and a lower ring, the two ends of the rod are respectively provided with the upper ring and the lower ring which are perpendicular to each other, the upper ring is connected to the base structure, and the lower ring is arranged on the upper part of the bracelet and connected thereto.

2. The impact-resistant railway freight car relief valve tie rod connection device according to claim 1 is characterized in that: The base structure comprises: A first seat plate, wherein the first seat plate is Z-shaped, a horizontal end of the first seat plate facing the outer side of the side beam is welded to a lower wing edge of the side beam, and a horizontal end of the first seat plate facing the inner side of the side beam is provided with a longitudinal oblong hole; a first rib plate, disposed between the first seat plate and the web plate of the side beam; A ring bolt comprises an upper screw portion and a lower circular ring portion, wherein the upper screw portion is connected to the longitudinal oblong hole through a nut, and the lower circular ring portion is connected to the lifting ring.

3. The impact-resistant railway freight car relief valve tie rod connection device according to claim 1, characterized in that: The base structure comprises: A second seat plate, the second seat plate is L-shaped, and a long end of the second seat plate is vertically welded to the web of the side beam; A hanging plate, vertically connected to the long end of the second seat plate, and a receiving groove is formed between one side of the hanging plate and the short end of the second seat plate; A second rib plate, the outer periphery of which is respectively connected to the lower wing plate of the side beam, the web plate of the side beam, the long end of the second seat plate and the other side of the hanging plate; A chain ring, the upper end of which is arranged in the receiving groove through a round pin, and the lower end of which is connected to the lifting ring.

4. The impact-resistant railway freight car relief valve tie rod connection device according to claim 1, characterized in that: The base structure comprises: A third seat plate, the third seat plate is L-shaped, the long end of the third seat plate is vertically welded to the web of the side beam, and the short end of the third seat plate is connected to the lifting ring through a first round through hole; A third rib plate, the outer periphery of which is respectively connected to the lower wing plate of the side beam, the web plate of the side beam, the long end of the third seat plate and the short end of the third seat plate.

5. The impact-resistant railway freight car relief valve tie rod connection device according to claim 1, characterized in that: The handle also includes a sleeve and two connecting plates, wherein the sleeve is sleeved on a straight section of the hand ring toward the outside of the side beam, one end of the connecting plate is connected to the straight section of the hand ring toward the inside of the side beam, and the other end of the connecting plate is hinged to the relief valve pulling structure through a first round pin.

6. The impact-resistant railway freight car relief valve tie rod connection device according to claim 1, characterized in that: The relief valve pulling structure is a relief valve pull rod, which includes a tail, a first rod shaft and a head. The first rod shaft is Z-shaped, and the tail and the head are respectively provided with a second circular through hole and a third circular through hole. The second circular through hole is hinged to the side of the handle, and the third circular through hole is hinged to the relief valve handle.

7. The impact-resistant railway freight car relief valve tie rod connection device according to claim 1, characterized in that: The relief valve pulling structure is a relief valve pull rope, and the relief valve pull rope includes a steel wire rope. The steel wire rope is hinged to the side of the handle and the relief valve handle through rings at both ends.

8. The impact-resistant railway freight car relief valve tie rod connection device according to claim 1, characterized in that: An assembly groove is provided on the relief valve handle, a round through hole is provided on the side wall of the assembly groove, and the end of the relief valve pulling structure is connected to the round through hole through a second round pin.

9. The impact-resistant railway freight car relief valve tie rod connection device according to claim 2, characterized in that: The lower portion of the ring bolt is not lower than the lower wing edge of the side beam.

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