Release valve pull rod for railway wagon

Abstract

The utility model relates to a release valve pull rod for a railway wagon. The problems that an existing release valve pull rod of the railway wagon cannot reset automatically, and release valve pull rods on the two sides cannot be operated independently are mainly solved. Which comprises two handle rods (11) which are bilaterally symmetrical along a release valve handle (103), and is characterized in that a reset mechanism (1) is arranged outside each handle rod (11), one end, close to the release valve handle (103), of each handle rod (11) is connected with a transmission chain mechanism (3) through a connecting mechanism (2), and the transmission chain mechanisms (3) are connected with the release valve handle (103). The release valve pull rod for the railway wagon can automatically reset, the release valve pull rods on the two sides can be operated independently and do not affect each other, and resetting of a handle seat of the release valve cannot be affected.

Description

Technical Field

[0001] The utility model relates to the field of railway freight car accessories, in particular to a relief valve pull rod for railway freight cars. Background Art

[0002] The relief valve pull rod is a simple accessory in the braking system of railway freight cars. It is usually made of round steel, one end is bent into a handle shape, and the other end is forged into a ring shape. It is connected to the handle of the relief valve through a round pin, and the pull rod handle is pulled to operate the relief valve for brake relief. The main problem currently exists is that the relief valve pull rod and the hanger seat are difficult to operate due to corrosion, wear, deformation, etc., or the relief valve handle seat cannot be reset. In addition, the relief valve pull rod of railway freight cars is generally arranged in the middle of the side beam, and the end rings of the relief valve pull rods on both sides of the car body are connected to the end of the relief valve handle by round pins. When the relief valve pull rod on one side is pulled, the pull rod on the other side will be driven to move at the same time. In this way, if the relief valve pull rod on one side is stuck due to a fault, the relief valve pull rod on the other side cannot work at the same time. Since the reset force of the handle seat of the relief valve is limited, if the relief valve pull rod is stuck, it may cause the relief valve to fail to reset, causing a brake system failure and delaying driving. Therefore, this relief valve pull rod cannot meet the current railway freight car's requirements for driving reliability, and needs to be improved to meet the reliability requirements of railway freight cars. Summary of the invention

[0003] In order to overcome the problems that the existing railway freight car relief valve pull rod cannot be automatically reset and the relief valve pull rods on both sides cannot be operated independently, the utility model provides a relief valve pull rod for railway freight car, which can be automatically reset, and the relief valve pull rods on both sides can be operated independently without affecting each other, and will not affect the reset of the handle seat of the relief valve.

[0004] The technical solution of the utility model is: a relief valve pull rod for a railway freight car, comprising two handle rods, the two handle rods are symmetrical along the relief valve handle, a reset mechanism is provided on the outside of the handle rod, one end of the handle rod close to the relief valve handle is connected to a transmission chain mechanism through a connecting mechanism, and the transmission chain mechanism is connected to the relief valve handle.

[0005] The reset mechanism comprises a box body, which is connected to the vehicle body through an upper vertical plate; a handle rod passes through the box body, a spring is arranged outside the handle rod, and when the spring is in a free state, the handle rod is located at one end of the relief valve handle.

[0006] The handle rod is connected with a handle retaining ring through rivets, and the handle retaining ring is located at one end of the spring close to the relief valve handle.

[0007] The contact points between the two end plates of the box body and the handle bar are respectively provided with a first sliding bearing and a second sliding bearing.

[0008] A locking seat is fixed on the right end plate of the box body, a through slot perpendicular to the handle rod is opened in the middle of the locking seat, and a radial locking pin is fixed on the handle rod.

[0009] The transmission chain mechanism includes a first link and a second link, the first link and the second link are connected by a connecting pin, the other end of the first link is connected to the connecting mechanism, and the other end of the second link is connected to the relief valve handle.

[0010] Furthermore, the connecting mechanism includes a connecting plate, one end of which is connected to the handle rod, and the other end of which is connected to the connecting rod, and the other end of the connecting rod is connected to the first chain link.

[0011] The transmission chain mechanism comprises a suspension chain, and two ends of the suspension chain are respectively connected to the connection mechanism and the relief valve handle through suspension chain terminals.

[0012] Furthermore, the connecting mechanism includes a connecting plate, one end of which is connected to the handle bar, and the other end of which is connected to the ear plate, and the other end of the ear plate is connected to the suspension chain terminal through an ear plate connecting pin.

[0013] The utility model has the following beneficial effects: due to the adoption of the above scheme, 1. The relief valve pull rod is automatically reset after operation through the handle reset mechanism, and a sliding bearing is provided to prevent the handle rod from being damaged due to wear and corrosion and causing the jamming phenomenon. Due to the action of the spring, the relief valve pull rod has a limit as a whole to avoid wear caused by the vibration of the vehicle operation. 2. A transmission chain structure is applied between the handle rod and the relief valve handle, so that the relief valve pull rods on both sides of the vehicle body can be pulled and worked separately without affecting each other, and it can be ensured that the relief valve handle seat is not affected by the lateral force when resetting. 3. The connection mechanism adopts welding between several parts, which is convenient to change the vertical and horizontal dimensions according to the actual needs of different models, and other accessories do not need to change the size to adapt to most railway freight cars. 4. Since the two mounting through holes on the neutral plate of the handle reset mechanism and the mounting hole of the transmission chain mechanism are the same as the installation size of the relief valve hanger and the installation size of the relief valve handle of the original railway freight car body, it can be more economical to be used for the improvement and transformation of the relief valve pull rod of the existing railway freight car. 5. Due to the change in the position of the locking seat of the box body and the locking pin on the handle rod, when the handle rod is pulled out and rotated more than 120°, the locking pin is stuck in the locking seat, so that the handle rod has a stable relief working position, which is conducive to improving the efficiency of train inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is an axonometric drawing of the utility model;

[0015] Figure 2 It is the front view of the utility model;

[0016] Figure 3 It is a top view of the utility model;

[0017] Figure 4 This is the front view when the transmission chain mechanism is a suspension chain;

[0018] Figure 5 It is a top view when the transmission chain mechanism is a suspension chain;

[0019] Figure 6 It is a schematic diagram of the utility model connected to the vehicle body (the transmission chain mechanism is a double straight chain);

[0020] Figure 7 This is a schematic diagram of the relief valve when the relief valve is pulled by the left relief valve lever;

[0021] Figure 8 This is a schematic diagram of the left slow-lock seat when it is locked;

[0022] Fig. 9 It is a schematic diagram of the utility model connected to a vehicle body (the transmission chain mechanism is a suspension chain).

[0023] In the figure, 1-reset mechanism, 2-connecting mechanism, 3-transmission chain mechanism, 10-box body, 11-handle rod, 12-first sliding bearing, 13-spring, 15-second sliding bearing, 16-handle retaining ring, 17-rivet, 18-nut, 19-vertical plate, 21-connecting rod head, 22-connecting plate, 23-connecting rod, 24-connecting rod head, 26-ear plate, 27-ear plate connecting pin, 30-first chain link, 31-connecting pin, 32-second chain link, 33-chain link pin hole, 34-relief valve handle connecting pin, 41-suspension chain, 42-suspension chain terminal, 43-suspension chain pin hole, 44-locking seat, 45-locking pin, 100-car body, 101-relief valve hanging seat, 102-screw, 103-relief valve handle, 104-handle connecting pin, 105-relief valve handle seat. DETAILED DESCRIPTION

[0024] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments, and the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by "up", "down", "left", "right", "inside", "outside", "top" and "bottom" are all based on the directions or positional relationships shown in the accompanying drawings. The purpose is only to facilitate the description of the present invention and simplify the description. It does not indicate or imply that the referred parts must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0026] Depend on Figures 1 to 9 As shown, a relief valve pull rod for a railway freight car includes two handle rods 11, and the two handle rods 11 are symmetrical along the relief valve handle 103. The structure of the relief valve pull rod is introduced below by taking the handle rod 11 on the left as an example. A reset mechanism 1 is provided on the outside of the handle rod 11, and the end of the handle rod 11 close to the relief valve handle 103 is connected to the transmission chain mechanism 3 through the connecting mechanism 2, and the transmission chain mechanism 3 is connected to the relief valve handle 103 through the handle connecting pin 104. The upper end of the relief valve handle 103 is connected to the relief valve handle seat 105, and the relief valve handle seat 105 is fixed on the car body 100. Pulling the handle rod 11 can drive the relief valve handle 103 to move through the connecting mechanism 2 and the transmission chain mechanism 3 in turn. After releasing the handle rod 11, the handle rod 11 returns to its original position under the action of the reset mechanism 1.

[0027] The reset mechanism 1 includes a box body 10, a vertical plate 19 is fixed on the upper part of the box body 10, and the vertical plate 19 is connected to the relief valve hanger 101 by screws 102, and the relief valve hanger 101 is fixed to the vehicle body 100. The handle rod 11 passes through the box body 10, and the handle rod 11 is connected to the handle retaining ring 16 by rivets 17. A spring 13 is provided outside the handle rod 11 on the left side of the handle retaining ring 16. The spring 13 pushes the handle rod 11 to the right in a free state, so that the handle rod 11 is located at one end of the relief valve handle 103. The end plates on both sides of the box body 10 are respectively provided with a first sliding bearing 12 and a second sliding bearing 15 at the contact points with the handle rod 11. The handle rod 11 passes through the two sliding bearings, so that the handle rod moves left and right more smoothly. The spring 13 is located between the two sliding bearings, and a boss is provided at the right end of the first sliding bearing 12 and the left end of the second sliding bearing 15, respectively, for fixing the spring 13 to prevent spring wear. The right end of the handle rod 11 is connected to the connecting mechanism 2 , and the end of the handle rod 11 is fixed by a nut 18 .

[0028] The front and rear side plates of the box body 10 are provided with round holes at positions corresponding to the handle retaining ring 16, which are used for the riveting process of the handle rod 11 and the handle retaining ring 16. During installation, the right end of the handle rod 11 passes through the first sliding bearing 12, the spring 13, the handle retaining ring 16, and the second sliding bearing 15 in sequence, and the spring 13 and the handle retaining ring 16 are inserted into the inner cavity of the box body 10, and then the handle retaining ring 16 and the handle rod 11 are riveted together and positioned with rivets 17.

[0029] The locking seat 44 is fixed on the right end plate of the box body 10. The locking seat 44 is hollow inside, and a through slot perpendicular to the handle rod 11 is opened in the middle of the right side to form two symmetrical and fixed L shapes. A radial locking pin 45 is fixed on the handle rod 11, and both ends of the locking pin 45 extend out of the handle rod 11. When the handle rod 11 is pulled to rotate it more than 120 degrees, the handle rod 11 can make the locking pin 45 enter the locking seat 44 to lock the relief valve.

[0030] The transmission chain mechanism 3 can be divided into a double straight chain structure and a suspension chain structure, wherein the double straight chain structure includes a first link 30 and a second link 32, both of which are straight chains, and the first link 30 and the second link 32 are connected by a connecting pin 31, and a nylon gasket is provided at the connection of the two links to reduce the wear between the links. The left end of the first link 30 is connected to the connecting mechanism 2 through a connecting pin, and the right end of the second link 32 is connected to the relief valve handle 103 through a handle connecting pin 104. The connecting mechanism 2 corresponding to the double straight chain structure includes a connecting plate 22, which is L-shaped and is formed by cutting and bending a steel plate. The left side of the connecting plate 22 is a connecting rod head 21, and the right side is connected to a connecting rod 23, and the connecting rod head 21 and the connecting rod 23 are both welded to the connecting plate 22. The connecting rod head 21 is connected to the right end of the handle rod 11, and the connecting rod head 24 at the right end of the connecting rod 23 is connected to the first link 30. The overall vertical height and length of the connecting mechanism 2 can be determined according to the needs of different vehicle models.

[0031] After the relief valve rod is installed as a whole, the two links of the transmission chain mechanism 3 are in a "V"-shaped relaxed state. After the handle rod 11 is pulled a certain distance, the two links are in a "-"-shaped tightened state. If the handle rod 11 is pulled further, the movable chain link 30 transmits the pulling force to the relief valve handle 103, so that the relief valve handle seat 105 works.

[0032] When the transmission chain mechanism 3 is a suspension chain structure, it includes a suspension chain 41, which can be a steel wire rope, a metal chain link or a high-strength polymer material harness, etc., which can withstand axial tension and droop naturally in a free state. Suspension chain terminals 42 are respectively provided at both ends of the suspension chain 41, the suspension chain terminal 42 on the left is connected to the connecting mechanism 2, and the suspension chain terminal 42 on the right is connected to the relief valve handle 103 through the handle connecting pin 104. The connecting mechanism 2 corresponding to the suspension chain structure includes a connecting plate 22, the left side of the connecting plate 22 is a connecting rod head 21, the connecting rod head 21 is connected to the handle rod 11, the right end of the connecting plate 22 is connected to the ear plate 26, and the other end of the ear plate 26 is connected to the suspension chain terminal 42 through the ear plate connecting pin 27.

[0033] When the suspension chain 41 is installed, the difference between the straight-line distance between the pin holes 43 of the connecting terminals 42 at both ends of the suspension chain 41 and the center distance between the pin hole center of the right end of the connecting ear plate 26 and the center distance of the relief valve handle installation hole is 40mm-50mm, so that the suspension chain 41 naturally droops in a free state. After the handle rod 11 is pulled a certain distance, the suspension chain 41 is in a "-" shape tension state. If the handle rod 11 is pulled further, the suspension chain 41 transmits the tension to the relief valve handle 103, so that the handle seat 105 of the relief valve works.

[0034] The relief valve pull rod is a bilaterally symmetrical structure, symmetrically connected to the relief valve handle 103. When the relief valve pull rods on both sides of the vehicle body are in a non-working state, under the action of the spring 13 of the reset mechanism 1, the handle rod 11 and the connecting mechanism 2 are integrally inward, so that the transmission chain mechanisms 3 on both sides are in a "V" shape or a naturally drooping relaxed state. When the handle rod 11 on one side is pulled to move a certain distance, the transmission chain mechanism 3 connected thereto is in a "-"-shaped tightened state, while the transmission chain mechanism 3 at the other end is still in a "V" shape or a naturally drooping relaxed state. When the handle rod 11 is continued to be pulled to move, the pulling force is transmitted to the handle 103 of the relief valve through the handle rod 11, the connecting mechanism 2, and the straightened transmission chain mechanism 3, so that the handle seat 105 of the relief valve works. At this time, the transmission chain mechanism 3 at the other end is still in a "V" shape or a naturally drooping relaxed state, and the force will not be transmitted to the connecting mechanism 2 and the handle rod 11 at the other end. In this way, the relief valve pull rods on both sides do not affect each other during operation, and when an accident such as jamming occurs on one side, it will not affect the normal operation of the other side.

[0035] Since the relief valve pull rods on both sides are provided with a handle reset mechanism 1 and a transmission chain mechanism 3, the handle seat 105 of the relief valve is normally in a state of not being acted upon by lateral forces, thereby ensuring that the relief valve can be reset normally.

[0036] 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 of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein.

Claims

1. A relief valve pull rod for a railway freight car, comprising two handle rods (11), the two handle rods (11) being symmetrical along a relief valve handle (103), characterized in that: A reset mechanism (1) is provided on the outside of the handle rod (11); one end of the handle rod (11) close to the relief valve handle (103) is connected to a transmission chain mechanism (3) via a connection mechanism (2); and the transmission chain mechanism (3) is connected to the relief valve handle (103).

2. The relief valve pull rod for railway freight car according to claim 1, characterized in that: The reset mechanism (1) comprises a box body (10), wherein the box body (10) is connected to a vehicle body (100) via an upper vertical plate (19); a handle bar (11) passes through the box body (10), a spring (13) is provided outside the handle bar (11), and when the spring (13) is in a free state, the handle bar (11) is located at one end of a relief valve handle (103).

3. The relief valve pull rod for railway freight car according to claim 2, characterized in that: The handle rod (11) is connected to a handle retaining ring (16) via a rivet (17), and the handle retaining ring (16) is located at one end of the spring (13) close to the relief valve handle (103).

4. The relief valve pull rod for railway freight car according to claim 3, characterized in that: A first sliding bearing (12) and a second sliding bearing (15) are respectively provided at the contact points between the two end plates of the box body (10) and the handle bar (11).

5. The relief valve pull rod for railway freight car according to claim 4, characterized in that: A locking seat (44) is fixed on the right end plate of the box body (10), a through slot perpendicular to the handle rod (11) is opened in the middle of the locking seat (44), and a radial locking pin (45) is fixed on the handle rod (11).

6. The relief valve pull rod for a railway freight car according to any one of claims 1 to 5, characterized in that: The transmission chain mechanism (3) comprises a first chain link (30) and a second chain link (32), wherein the first chain link (30) and the second chain link (32) are connected via a connecting pin (31), and the other end of the first chain link (30) is connected to the connecting mechanism (2), and the other end of the second chain link (32) is connected to the relief valve handle (103).

7. The relief valve pull rod for railway freight car according to claim 6, characterized in that: The connection mechanism (2) comprises a connection plate (22), one end of the connection plate (22) is connected to the handle bar (11), the other end of the connection plate (22) is connected to the connecting rod (23), and the other end of the connecting rod (23) is connected to the first chain link (30).

8. The relief valve pull rod for a railway freight car according to any one of claims 1 to 5, characterized in that: The transmission chain mechanism (3) comprises a suspension chain (41), and two ends of the suspension chain (41) are respectively connected to the connection mechanism (2) and the relief valve handle (103) through suspension chain terminals (42).

9. The relief valve pull rod for railway freight car according to claim 8, characterized in that: The connection mechanism (2) comprises a connection plate (22), one end of the connection plate (22) being connected to the handle bar (11), and the other end being connected to the ear plate (26), and the other end of the ear plate (26) being connected to the suspension chain terminal (42) via an ear plate connection pin (27).

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