Anti-pulling embedded sleeve for railway

Abstract

The utility model discloses an anti-pulling embedded sleeve for railway, which comprises an inner pipe and an outer pipe sleeved on the outer side of the inner pipe, the inner pipe is made of metal, the outer pipe is made of insulating material, an inner thread groove I is arranged in the outer pipe, an outer thread is arranged outside the inner pipe, the inner pipe and the outer pipe are connected and fixed through the thread, and the inner pipe and the outer pipe are connected and fixed through the thread. A second inner threaded groove is formed in the inner pipe, a threaded spike is fixedly arranged in the inner pipe through threaded connection, the diameter of an outer ring of the outer pipe is gradually increased from top to bottom, a plurality of inner ring grooves are formed in the outer ring of the outer pipe at equal intervals, and annular inclined plates are fixedly arranged at the positions, located at the upper ends of the inner ring grooves, of the outer ring of the outer pipe. A fixing plate is arranged at the upper ends of the inner pipe and the outer pipe; the anti-pulling structure is high in anti-pulling performance.

Description

Technical Field

[0001] This utility model relates to the field of railway accessories technology, and more specifically to a pre-embedded sleeve for railway pull-out resistance. Background Technology

[0002] Railway bolt embedded sleeves are threaded sleeves pre-embedded in concrete sleepers. They can be threadedly connected to railway spike bolts. The connection strength between the threaded spike and the embedded sleeve, and the connection strength between the embedded sleeve and the sleeper, are very important. Effective pull-out resistance can make the threaded spike stable and not easy to loosen, thus making the rail more stable.

[0003] The existing Chinese utility model, CN203007737U, discloses an anti-loosening pre-embedded sleeve. This sleeve works by screwing a track spike into the threaded pre-embedded sleeve. Due to the special connection between the track spike thread and the pre-embedded sleeve thread, the protruding ridge at the end of the pre-embedded sleeve deforms, generating a clamping force to prevent the track spike from loosening. However, the connection strength between the pre-embedded sleeve and the sleeper is not improved. Furthermore, to ensure insulation, the pre-embedded sleeve is made of plastic and directly embedded in the sleeper. The plastic sleeve is in direct contact with the threaded track spike, and vibrations from the threaded track spike can easily damage the plastic sleeve, resulting in an unreliable connection strength. Therefore, this application proposes an anti-pull-out pre-embedded sleeve for railways. Utility Model Content

[0004] The purpose of this utility model is to provide a railway anti-pull-out pre-embedded sleeve with strong anti-pull-out performance.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A type of anti-pull-out pre-embedded sleeve for railways includes an inner tube and an outer tube sleeved outside the inner tube. The inner tube is made of metal, and the outer tube is made of insulating material. The outer tube has an internal threaded groove and the inner tube has an external thread. The inner tube and the outer tube are fixedly connected by threads. The inner tube has a second internal threaded groove and a threaded rail spike is fixedly connected to the inner tube by threads. The outer diameter of the outer tube gradually increases from top to bottom. The outer circle of the outer tube has several inner ring grooves at equal intervals. An annular inclined plate is fixedly installed at the upper end of the inner ring groove on the outer circle of the outer tube. A fixing plate is provided at the upper end of the inner tube and the outer tube.

[0007] By adopting the above technical solution, this utility model has the following advantages:

[0008] The design of the inner and outer tubes in this invention ensures that the insulating material of the outer tube provides insulation for the embedded sleeve itself, while the metal material of the inner tube prevents vibrations from the threaded spikes from affecting it, thus reducing the risk of damage. This increases the connection strength between the inner tube and the threaded spikes and effectively improves pull-out resistance. The gradually increasing diameter of the outer tube's outer ring from top to bottom prevents separation of the outer tube from the sleeper when it is embedded within the sleeper, further enhancing the connection strength. The inner ring groove and annular inclined plate further increase the contact area between the outer tube and the sleeper, effectively improving the pull-out resistance of the outer tube.

[0009] Furthermore, a number of protrusions are fixedly provided on the side of the internal thread groove that contacts the upper end face of the external thread of the inner tube.

[0010] By adopting the above technical solution, this utility model has the following advantages:

[0011] The protrusion in this invention can enhance the friction between the inner tube and the threaded spike, thereby further strengthening the connection between the inner tube and the threaded spike and achieving effective pull-out resistance.

[0012] Furthermore, a plurality of inner sealing rings are fixedly provided at equal intervals within the inner thread groove, and the inner side of the inner sealing ring abuts against the outer side of the inner tube.

[0013] By adopting the above technical solution, this utility model has the following advantages:

[0014] The sealing ring of this invention allows the elasticity of the sealing ring to compress the threaded spike after it is fixed, thereby further fixing the threaded spike and improving its pull-out resistance.

[0015] Furthermore, the fixing plate includes an annular plate and a ring plate fixed on the annular plate. The annular plate and the ring plate are sleeved on the outside of the threaded rail spike. The annular plate is fixedly connected to the upper end of the corresponding outer tube by screws, and the ring plate is fixedly connected to the corresponding threaded rail spike by screws.

[0016] By adopting the above technical solution, this utility model has the following advantages:

[0017] The annular plate and ring plate of this utility model serve to fix the outer tube, inner tube and threaded spikes, thereby further improving the pull-out resistance of the inner tube and threaded spikes. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the cross-sectional structure at the center of this utility model;

[0020] Figure 2 This utility model Figure 1 Enlarged structural diagram at point A in the middle.

[0021] Reference numerals: 1. Outer tube; 101. Internal thread groove one; 2. Inner tube; 201. Internal thread groove two; 202. External thread; 3. Annular plate; 301. Ring plate; 4. Threaded spike; 5. Inner annular groove; 6. Annular inclined plate; 7. Protrusion; 8. Inner sealing ring. Detailed Implementation

[0022] like Figure 1 As shown in this specific embodiment, a railway anti-pull-out pre-embedded sleeve includes an inner tube 2 and an outer tube 1 sleeved on the outside of the inner tube 2. The inner tube 2 is made of metal, and the outer tube 1 is made of insulating material. The outer tube 1 has an inner thread groove 101, and the inner tube 2 has an outer thread 202. The inner tube 2 and the outer tube 1 are fixed by threaded connection. The inner tube 2 has an inner thread groove 201, and a threaded rail spike 4 is fixed in the inner tube 2 by threaded connection. The outer diameter of the outer tube 1 gradually increases from top to bottom. The outer circle of the outer tube 1 has several inner ring grooves 5 at equal intervals. An annular inclined plate 6 is fixed at the upper end of the inner ring groove 5 on the outer circle of the outer tube 1. A fixing plate is provided at the upper end of the inner tube 2 and the outer tube 1.

[0023] Through the above configuration, the inner tube 2 and outer tube 1 of this utility model ensure that the insulating material of the outer tube 1 provides insulation for the embedded sleeve itself, and the metal material of the inner tube 2 prevents the vibration of the threaded spike 4 from affecting the inner tube 2, making the inner tube 2 less prone to damage. This increases the connection strength between the inner tube 2 and the threaded spike 4, effectively improving the pull-out resistance. The gradually increasing outer diameter of the outer tube 1 from top to bottom ensures that when the outer ring is embedded in the sleeper, the excessively large diameter at the lower end of the outer ring makes it difficult for the outer tube 1 to separate from the sleeper, further improving the connection strength between the outer tube 1 and the sleeper. The inner ring groove 5 and the annular inclined plate 6 further increase the contact area between the outer side of the outer tube 1 and the sleeper, thereby effectively improving the pull-out resistance of the outer tube 1.

[0024] like Figures 1 to 2 As shown, a number of protrusions 7 are fixedly provided on the side of the inner thread groove 101 that contacts the upper end face of the outer thread 202 of the inner tube 2; a number of inner sealing rings 8 are fixedly provided at equal intervals in the inner thread groove 101, and the inner side of the inner sealing ring 8 abuts against the outer side of the inner tube 2; the fixing plate includes an annular plate 3 and a ring plate 301 fixed on the annular plate 3. The annular plate 3 and the ring plate 301 are sleeved on the outer side of the threaded spike 4. The annular plate 3 is fixedly connected to the upper end of the corresponding outer tube 1 by screws, and the ring plate 301 is fixedly connected to the corresponding threaded spike 4 by screws.

[0025] Through the above settings, the protrusion 7 of this utility model can enhance the friction between the inner tube 2 and the threaded spike 4, thereby further strengthening the connection strength between the inner tube 2 and the threaded spike 4, and achieving effective pull-out resistance; the sealing ring of this utility model allows the elasticity of the sealing ring to compress the threaded spike 4 after the threaded spike 4 is fixed, further fixing the threaded spike 4 and improving the pull-out resistance of the threaded spike 4; the annular plate 3 and the ring plate 301 of this utility model serve to fix the outer tube 1, the inner tube 2 and the threaded spike 4, thereby further improving the pull-out resistance of the inner tube 2 and the threaded spike 4.

[0026] Working principle: During installation, the inner tube 2 is simply fixed inside the outer tube 1 via a threaded connection, and the outer tube 1 is then pre-embedded in the sleeper. When installing the threaded spike 4, the threaded spike 4 is simply passed through the ring plate 301 and the annular plate 3, and fixed to the inner tube 2 via a threaded connection. Then, the ring plate 301 and the annular plate 3 are fixed to the threaded spike 4 and the outer tube 1 respectively via screws. The inner annular groove 5, the annular inclined plate 6, and the gradually increasing diameter at the lower end of the outer tube 1 can all effectively prevent the outer tube 1 from detaching from the sleeper. The protrusion 7 and the inner sealing ring 8 can effectively prevent the inner tube 2 from detaching from the outer tube 1. The metal material of the inner tube 2 effectively strengthens the connection strength between the threaded spike 4 and the inner tube 2. The fixing of the annular plate 3 and the ring plate 301 can effectively prevent the threaded spike 4 from separating from the inner tube 2 and the outer tube 1, thereby effectively improving the pull-out resistance of the threaded spike 4. The threaded spike 4 and the pre-embedded sleeve are both publicly disclosed existing technologies, so they will not be described in detail here.

[0027] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within its protection scope.

Claims

1. A type of anti-pull-out embedded sleeve for railways, characterized in that, The device includes an inner tube (2) and an outer tube (1) sleeved on the outside of the inner tube (2). The inner tube (2) is made of metal and the outer tube (1) is made of insulating material. The outer tube (1) has an inner thread groove (101) and an outer thread (202) on the outside of the inner tube (2). The inner tube (2) and the outer tube (1) are fixed by threaded connection. The inner tube (2) has an inner thread groove (201) and a threaded rail spike (4) is fixed by threaded connection. The outer diameter of the outer tube (1) gradually increases from top to bottom. The outer circle of the outer tube (1) is provided with several inner ring grooves (5) at equal intervals. The outer circle of the outer tube (1) is fixed with an annular inclined plate (6) at the upper end of the inner ring groove (5). The upper ends of the inner tube (2) and the outer tube (1) are provided with fixing plates.

2. The anti-pull-out embedded sleeve for railways according to claim 1, characterized in that, Several protrusions (7) are fixedly provided on the side of the internal thread groove (101) that contacts the upper end face of the external thread (202) of the inner tube (2).

3. The anti-pull-out embedded sleeve for railways according to claim 2, characterized in that, A plurality of inner sealing rings (8) are fixedly provided at equal intervals in the inner thread groove (101), and the inner side of the inner sealing ring (8) abuts against the outer side of the inner tube (2).

4. The anti-pull-out embedded sleeve for railways according to claim 1, characterized in that, The fixing plate includes an annular plate (3) and a ring plate (301) fixed on the annular plate (3). The annular plate (3) and the ring plate (301) are sleeved on the outside of the threaded spike (4). The annular plate (3) is fixedly connected to the upper end of the corresponding outer tube (1) by screws, and the ring plate (301) is fixedly connected to the corresponding threaded spike (4) by screws.

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