Rail transit pipe joint

Abstract

The utility model relates to the technical field of rail transit pipe joints, in particular to a rail transit pipe joint which comprises a first connecting pipe, a second connecting pipe and a sealing device, the second connecting pipe is installed at one end of the first connecting pipe, the sealing device is arranged on the surface of the first connecting pipe and comprises a clamping groove, and the clamping groove is formed in the surface of the second connecting pipe. The clamping groove is located in the inner side of the first connecting pipe, a rubber ring is fixedly connected to the inner side of the first connecting pipe and placed on the surface of the clamping groove, a hollow groove is formed in the surface of the rubber ring, an air bag is placed on the surface of the hollow groove, and an air inlet pipe is fixedly connected to the surface of the air bag and placed on the surface of the first connecting pipe. A protection ring is fixedly connected to the surface of the first connecting pipe. According to the utility model, the sealing device is arranged, so that a gap between the joint and the pipeline can be effectively sealed, the situation that the sealing performance of the joint and the pipeline is reduced due to the influence of vibration is avoided, the sealing performance of the joint is further improved, and meanwhile, the buffering performance of the joint is also improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to rail transit pipe joint technical field especially relates to a rail transit pipe joint. BACKGROUND

[0002] Rail transit pipe joint refers to the components used to connect different pipes or pipes and equipment in the rail transit system, which plays a crucial role in the rail transit system, ensuring the stable connection and sealing of various pipe systems, thereby ensuring the normal operation and safety of rail transit. Rail transit pipe joints have various types, each with its specific application scenarios and technical characteristics: Ordinary rail joint: connecting the same type of rail with joint clamps and joint bolts, suitable for railway lines that need to change direction or turn, helping to achieve smooth connection of switches and curves. Special-shaped rail joint: connecting different types of rails with special-shaped joint clamps and joint bolts, usually used at the junction of different types of tracks, such as station yard access section line ends. Conductive rail joint: used in the traction current loop of subway lines, with steel strands welded on the outside of the rail joint to improve rail conductivity. Insulated rail joint: adding insulating material between the joint clamp, joint bolt, and rail to separate the track circuit of the signal system. Cemented rail joint: made using special adhesive materials to improve insulation performance and stress state, commonly used in new lines. Frozen rail joint: fixed with high-strength bolts and crescent-shaped washers to ensure that the rail joint does not change, suitable for elevated lines.

[0003] The existing device such as CN218644983U, rail transit pipe joint, relates to the technical field of rail transit pipe joint. It includes a first pipe and a second pipe. The utility model discloses a fixing assembly is set up, through the rotation of the friction wheel, the connecting rod and the moving rod are rotated, because the spring exerts force on the moving rod, the connecting rod is always in contact with the contour groove, but because the friction wheel rotates, the connecting rod has force in the rotation direction, through the design of the contour groove slope, when the connecting rod rotates, it will move, this movement makes the spring contract, the moving rod moves, and the contour groove has two different depths, the depth of the deep one makes the moving rod penetrate the inner wall of the rotating part, and the depth of the shallow one makes the moving rod contract in the rotating part, through the two states, the fixing between the rotating part and the second fixed pipe can be realized, so that the first pipe and the second pipe are fixed.

[0004] When the worker needs to connect the pipe, the worker connects the joint with the pipe so that the joint connects the pipe, but the existing joint usually adopts the close cooperation of threads and sealing rings for sealing during use, which causes the joint to loosen due to long-term vibration during use, thereby causing the sealing performance of the joint to decrease. UTILITY MODEL CONTENTS

[0005] The utility model discloses a rail transit pipe joint which solves the problem of reduced sealing performance of the joint in the prior art.

[0006] In order to achieve the above object, the utility model discloses a rail transit pipe joint, including first pipe joint, second pipe joint and sealing device, the second pipe joint is installed on the one end of first pipe joint, the sealing device sets up on the surface of first pipe joint, the sealing device includes the clamping slot, the clamping slot is set up on the surface of second pipe joint, the clamping slot is located the inside of first pipe joint, the inside of first pipe joint is fixedly connected with rubber ring, the rubber ring places on the surface of clamping slot, the surface of rubber ring is set up with the hollow slot, the surface of hollow slot is placed with air bag, the surface of air bag is fixedly connected with the air inlet pipe, the air inlet pipe places on the surface of first pipe joint, the surface of first pipe joint is fixedly connected with the protection ring, the air inlet pipe places in the inside of protection ring, the surface of protection ring is threadedly connected with the protective cover, the protective cover is located the top of first pipe joint, the top of protection ring is placed with sealing pad, the protective cover is covered on the surface of sealing pad, and sealing pad can cooperate with protection ring to reach the purpose of sealing air inlet pipe.

[0007] Preferably, the surface of the protection ring is provided with a leakage prevention device, the leakage prevention device comprises a support plate, the support plate is fixedly connected with the inside of the air inlet pipe, and a sliding hole is formed in the surface of the support plate.

[0008] Preferably, four air holes are formed in the surface of the support plate in a ring shape, a sliding rod is slidably connected to the surface of the sliding hole, and the sliding rod is located in the middle of the four air holes.

[0009] Preferably, the bottom end of the sliding rod is fixedly connected with a tray, a sealing block is fixedly connected to the surface of the tray, and the sealing block is inserted into the surface of the air hole.

[0010] Preferably, a return spring is fixedly connected between the sliding rod and the support plate, and the return spring is located in the middle of the four air holes.

[0011] Compared with the prior art, the utility model has the advantages and positive effects that:

[0012] In this invention, by setting a sealing device, rotating the protective cover causes it to detach from the protective ring, thus freeing it from binding the sealing gasket. The operator then uses a specially designed inflation device placed on the protective ring. The inflation device blows gas into the air inlet pipe, which guides the gas into the airbag. The airbag inflates, compressing the rubber ring, causing it to expand and abut against the groove. The sealing gasket is then placed on the protective ring. The protective cover is then placed on the protective ring and rotated, establishing a threaded connection between the protective cover and the protective ring. The protective cover presses down on the sealing gasket. By setting this sealing device, the gap between the joint and the pipe can be effectively sealed, preventing a decrease in sealing performance due to vibration. This improves the joint's sealing performance and also enhances its cushioning properties. Attached Figure Description

[0013] Figure 1 This utility model provides a schematic diagram of a sealing device for a rail transit pipe joint.

[0014] Figure 2 A three-dimensional structural schematic diagram of a rail transit pipe joint is provided for this utility model;

[0015] Figure 3 This utility model proposes a rail transit pipe joint. Figure 1 Schematic diagram of the structure at point A in the middle;

[0016] Figure 4 This utility model provides a schematic diagram of a leak-proof device for a rail transit pipe joint.

[0017] Figure 5 This utility model proposes a rail transit pipe joint. Figure 4 Schematic diagram of the structure at point B.

[0018] Legend:

[0019] 1. First connecting pipe; 2. Second connecting pipe; 3. Sealing device; 31. Protective cover; 32. Sealing gasket; 33. Protective ring; 34. Hollow groove; 35. Rubber ring; 36. Airbag; 37. Air inlet pipe; 38. Slot; 4. Leakage prevention device; 41. Sliding rod; 42. Return spring; 43. Sealing block; 44. Tray; 45. Support plate; 46. Sliding hole; 47. Air hole. Detailed Implementation

[0020] Please see Figures 1-5 This utility model provides a technical solution: a rail transit pipe connector, including a first connector 1, a second connector 2 and a sealing device 3, wherein the second connector 2 is installed on one end of the first connector 1 and the sealing device 3 is disposed on the surface of the first connector 1.

[0021] The specific settings and functions of the sealing device 3 and the leakage prevention device 4 will be described below.

[0022] In this embodiment, the sealing device 3 includes a clamping groove 38, which is arranged on the surface of the second connecting pipe 2 and located on the inner side of the first connecting pipe 1. The inner side of the first connecting pipe 1 is fixedly connected with a rubber ring 35, which is placed on the surface of the clamping groove 38. The surface of the rubber ring 35 is provided with a hollow groove 34, and the surface of the hollow groove 34 is placed with an air bag 36. The surface of the air bag 36 is fixedly connected with an air inlet pipe 37, which is placed on the surface of the first connecting pipe 1. The surface of the first connecting pipe 1 is fixedly connected with a protective ring 33, and the air inlet pipe 37 is placed on the inner side of the protective ring 33. The surface of the protective ring 33 is threadedly connected with a protective cover 31, which is located above the first connecting pipe 1.

[0023] Specifically, the top end of the protective ring 33 is placed with a sealing gasket 32, and the protective cover 31 is sleeved on the surface of the sealing gasket 32. The sealing gasket 32 can cooperate with the protective ring 33 to achieve the purpose of sealing the air inlet pipe 37.

[0024] Specifically, the surface of the protective ring 33 is provided with a leakage prevention device 4, which includes a support plate 45 fixedly connected with the inner side of the air inlet pipe 37. The surface of the support plate 45 is provided with a sliding hole 46.

[0025] In this embodiment, the support plate 45 can cooperate with the air inlet pipe 37 to achieve the purpose of guiding the sliding rod 41.

[0026] In this embodiment, the surface of the support plate 45 is provided with four annularly arranged air holes 47. The surface of the sliding hole 46 is slidingly connected with a sliding rod 41, which is located in the middle of the four air holes 47. The air holes 47 can cooperate with the support plate 45 to achieve the purpose of air inlet.

[0027] Specifically, the bottom end of the sliding rod 41 is fixedly connected with a tray 44, and the surface of the tray 44 is fixedly connected with a sealing block 43, which is inserted with the surface of the air hole 47.

[0028] In this embodiment, the support plate 45 can cooperate with the sliding rod 41 to achieve the purpose of guiding the sliding rod 41.

[0029] Specifically, a return spring 42 is fixedly connected between the sliding rod 41 and the support plate 45, and the return spring 42 is located in the middle of the four air holes 47.

[0030] In this embodiment, the return spring 42 can cooperate with the sliding rod 41 and the support plate 45 to achieve the purpose of adjusting the reset of the sliding rod 41.

[0031] Working principle: through the setting sealing device 3, rotate the protective cover 31, the protective cover 31 is separated from the protective ring 33, the protective cover 31 loses the restraint to the sealing gasket 32, the worker uses the special inflation equipment set in the protective ring 33, the inflation equipment blows gas into the air inlet pipe 37, the air inlet pipe 37 guides the gas into the air bag 36, the air bag 36 expands, the air bag 36 extrudes the rubber ring 35, the volume of the rubber ring 35 expands and is opposite to the clamping groove 38, the sealing gasket 32 is placed on the protective ring 33, the protective cover 31 is set on the protective ring 33 and is rotated, the protective cover 31 is connected with the surface of the protective ring 33 by screw thread, the protective cover 31 presses the sealing gasket 32, through the setting sealing device 3, the gap between the joint and the pipeline can be effectively sealed, the situation that the sealing property of the joint and the pipeline is reduced due to the influence of vibration is avoided, and the sealing property of the joint is improved, the buffering property of the joint is also improved, in addition, through the setting leakage prevention device 4, the worker installs the special inflation equipment on the protective ring 33, the inflation equipment will push the sliding rod 41 in the installation process, the sliding hole 46 guides the sliding rod 41, the sliding rod 41 pushes the tray 44, the tray 44 drives the sealing block 43, the sealing block 43 is separated from the air hole 47, when the special inflation equipment is installed, the air hole 47 will be in the open state for a long time, the worker uses the inflation equipment to inflate the air bag 36, when the inflation is completed, the inflation equipment is pulled out, the inflation equipment gradually moves away from the air inlet pipe 37, the reset spring 42 pushes the sliding rod 41, the sliding rod 41 pulls the tray 44, the tray 44 pushes the sealing block 43, the sealing block 43 slides and is inserted into the air hole 47, through the setting leakage prevention device 4, the situation that the gas leaks can be effectively reduced, the situation that the air inlet pipe 37 leaks when the worker pulls out the inflation equipment is avoided, and the sealing property of the sealing device 3 is improved.

Claims

1. A rail transit pipe joint comprising a first pipe (1), a second pipe (2) and a sealing device (3), characterized in that: The second connecting pipe (2) is installed on one end of the first connecting pipe (1), the sealing device (3) is arranged on the surface of the first connecting pipe (1), the sealing device (3) comprises a clamping groove (38), the clamping groove (38) is arranged on the surface of the second connecting pipe (2), the clamping groove (38) is located on the inner side of the first connecting pipe (1), the inner side of the first connecting pipe (1) is fixedly connected with a rubber ring (35), the rubber ring (35) is arranged on the surface of the clamping groove (38), a hollow groove (34) is arranged on the surface of the rubber ring (35), the surface of the hollow groove (34) is arranged with an air bag (36), the surface of the air bag (36) is fixedly connected with an air inlet pipe (37), the air inlet pipe (37) is arranged on the surface of the first connecting pipe (1), the surface of the first connecting pipe (1) is fixedly connected with a protective ring (33), the air inlet pipe (37) is arranged on the inner side of the protective ring (33), the surface of the protective ring (33) is screwedly connected with a protective cover (31), and the protective cover (31) is located above the first connecting pipe (1).

2. A rail transit pipe joint according to claim 1, characterized in that: The top end of the protective ring (33) is arranged with a sealing gasket (32), and the protective cover (31) is sleeved on the surface of the sealing gasket (32).

3. A rail transit pipe joint according to claim 2, characterised in that: The surface of the protective ring (33) is provided with a leakage prevention device (4), the leakage prevention device (4) comprises a supporting plate (45), the supporting plate (45) is fixedly connected with the inner side of the air inlet pipe (37), and the surface of the supporting plate (45) is provided with a sliding hole (46).

4. A rail transit pipe joint according to claim 3, characterised in that: Four annular air holes (47) are arranged on the surface of the supporting plate (45), a sliding rod (41) is slidably connected with the surface of the sliding hole (46), and the sliding rod (41) is located in the middle of the four air holes (47).

5. A rail transit pipe joint according to claim 4, characterised in that: The bottom end of the sliding rod (41) is fixedly connected with a tray (44), the surface of the tray (44) is fixedly connected with a sealing block (43), and the sealing block (43) is inserted with the surface of the air hole (47).

6. A rail transit pipe joint according to claim 5, characterised in that: A reset spring (42) is fixedly connected between the sliding rod (41) and the supporting plate (45), and the reset spring (42) is located in the middle of the four air holes (47).

Images