Quick dismounting and fixing fixture for railway communication leaky coaxial cable

Abstract

This invention relates to a quick-release and fixing clamp for leaky coaxial cables used in railway communication. It comprises: a left clamping body, a right clamping body, a middle clamping body, and a base. The left clamping body includes a left curved clamping plate and a left connecting rod, the left curved clamping plate being fixed to one end of the left connecting rod. The right clamping body includes a right curved clamping plate and a right connecting rod, the right curved clamping plate being fixed to one end of the right connecting rod. The middle clamping body includes a middle curved clamping plate, a rack, and a rack cap, the middle curved clamping plate being fixed to one end of the rack, and the rack cap being fixed to the other end of the rack. The base is provided with a left support, a base hole, and a right support. The left support includes a left front support and a left rear support, and the right support includes a right front support and a right rear support. It can automatically clamp using the gravity of the leaky cable; it enables quick installation and removal of the leaky cable; the cable is clamped and fixed when placed in the clamping slot, and automatically released when lifted.

Description

Technical Field

[0001] Applications include quick-release and fixing clamps for leaky coaxial cables in railway communications. Background Technology

[0002] Leaky coaxial cables for railway communication are used to transmit wireless signals in railway communication systems and are mainly laid in tunnels. During leaky cable testing, the cable needs to be straightened and fixed, but existing fixing methods are inefficient and lack stability. This invention designs a quick-release fixing clamp that is easy to operate and provides good stability. Leaky coaxial cables for railway communication are used to transmit wireless signals in railway communication systems. This product has been included in the China State Railway Group's "Four Electrical Systems" (electrical, electrical, and electronic) material sampling inspection list, indicating a huge demand for testing. This invention has a promising market prospect after its implementation.

[0003] Leaky coaxial cables for railway communication are used to transmit wireless signals in railway communication systems and are mainly laid in tunnels, with a huge usage in railway construction. The testing standard is TB / T 3201-2015 "Leaky Coaxial Cables for Railway Communication". Leaky coaxial cables for railway communication are included in the China State Railway Group's (CSR) inspection catalog for supplied materials, and 10% of each batch of products entering the railway system must be inspected, resulting in a massive testing workload.

[0004] In the testing of leaky coaxial cables for railway communication, tests such as attenuation constant and coupling loss require straightening the cable and fixing it to a non-metallic bracket. Currently, there are two main fixing methods: one is using a construction-grade cable hanger, which is sturdy but cumbersome to operate and difficult to disassemble; the other method is using tape to wrap the cable, which is quick but less secure. There is an urgent need to design a quick-release and secure fixing clamp that balances efficiency and robustness to better complete the inspection and testing of leaky cables. Summary of the Invention

[0005] This utility model provides a quick-release and fixing clamp for leaky coaxial cables used in railway communication. It is characterized by comprising: a left clamp, a right clamp, a middle clamp, and a base. The left clamp includes: a left curved clamp plate and a left connecting rod, the left curved clamp plate being fixed to one end of the left connecting rod. The right clamp includes: a right curved clamp plate and a right connecting rod, the right curved clamp plate being fixed to one end of the right connecting rod. The middle clamp includes: a middle curved clamp plate, a rack, and a rack cap, the middle curved clamp plate being fixed to one end of the rack, and the rack cap being fixed to the other end of the rack. The base is provided with a left support, a base hole, and a right support. The left support includes a left front support and a left rear support, and the right support includes a right front support and a right rear support. Both the left front support and the left rear support have left support holes. A left pin is provided between the support and the left rear support. Both ends of the left pin are movably connected to the holes in the left support. A left gear is provided on the left pin. The other end of the left connecting rod is connected to the left pin. The left gear drives the left connecting rod to rotate around the left support via the left pin. Both the right front support and the right rear support have right support holes. A right pin is provided between the right front support and the right rear support. Both ends of the right pin are movably connected to the holes in the right support. A right gear is provided on the right pin. The other end of the right connecting rod is connected to the right pin. The right gear drives the right connecting rod to rotate around the right support via the right pin. The rack of the middle clamp passes through the hole in the base. The rack engages with the left gear and the right gear respectively.

[0006] Furthermore, the lifting and lowering motion of the rack drives the rotation of the left gear and the right gear, which in turn drives the rotation of the left arc clamping plate and the right arc clamping plate through the left connecting rod and the right connecting rod, and together with the middle arc clamping plate, forms the enclosure or opening of the arc groove.

[0007] Furthermore, the arcuate groove formed by the left arcuate clamping plate, the right arcuate clamping plate, and the middle arcuate clamping plate together has an arcuate degree greater than or equal to 180 degrees.

[0008] Using this new type of clamp, when the leaky cable is placed into the arc-shaped groove formed by the left, right, and middle arc clamps, the weight of the cable causes the middle clamp to sink. The rack drives the left and right gears to mesh, and the left and right connecting rods respectively rotate the left and right arc clamps towards the middle clamp, ultimately clamping the cable on both sides. The heavier the cable, the greater the clamping force, effectively securing it. After testing, simply lift the cable; as the load decreases, the left and right arc clamps rotate away from the middle clamp, and the clamp automatically releases.

[0009] Compared with existing technical solutions, the advantages of this new invention are as follows: when used for testing the attenuation coefficient and coupling loss of leaky cables, it balances efficiency and firmness in fixing the leaky cable, and can achieve automatic clamping by the gravity of the leaky cable; it can achieve quick assembly and disassembly of the leaky cable, which can be clamped and fixed by placing the leaky cable into the clamp slot, and can be automatically released by lifting it.

[0010] Other features of the present invention will become clear from the following description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0011] Figure 1 schematically shows a front view of the structure of a quick-release and fixing clamp for a leaky coaxial cable for railway communication according to an embodiment of the present invention.

[0012] Figure 2 schematically shows a perspective view of the structure of a quick-release and fixing clamp for a leaky coaxial cable for railway communication according to an embodiment of the present invention. Detailed Implementation

[0013] The following will describe in detail Embodiment 1 of the present invention with reference to the accompanying drawings.

[0014] As shown in Figures 1 and 2, this utility model provides a quick-release and fixing clamp for leaky coaxial cables used in railway communication, comprising: a left clamp 1, a right clamp 2, a middle clamp 3, and a base 4. The left clamp 1 includes: a left arc-shaped clamp plate 101 and a left connecting rod 102, with the left arc-shaped clamp plate 101 fixed to one end of the left connecting rod 102. The right clamp 2 includes: a right arc-shaped clamp plate 201 and a right connecting rod 202, with the right arc-shaped clamp plate 201 fixed to one end of the right connecting rod 202. The middle clamp 3 includes: a middle arc-shaped clamp plate 301, a rack 302, and a rack cap 303, with the middle arc-shaped clamp plate 301 fixed to one end of the rack 302 and the rack cap 303 fixed to the other end of the rack 302. The base 4 is provided with a left support 14, a base hole 401, and a right support 15. The left support 14... The system includes a left front support 141 and a left rear support 142. The right support 15 includes a right front support 151 and a right rear support 152. Both the left front support 141 and the left rear support 142 have left support holes. A left pin 18 is provided between the left front support 141 and the left rear support 142. Both ends of the left pin 18 are movably connected to the left support holes. A left gear 16 is provided on the left pin 18. The other end of a left connecting rod 102 is connected to the left pin 18. The left gear 16 drives the left connecting rod 102 to rotate around the left support via the left pin 18. Both the right front support 151 and the right rear support 152 have right support holes. A right pin 19 is provided between the right front support 151 and the right rear support 152. Both ends of the right connecting rod 202 are movably connected to the right support hole. A right gear 17 is provided on the right pin 19. The other end of the right connecting rod 202 is connected to the right pin 19. The right gear 17 drives the right connecting rod 202 to rotate around the right support through the right pin 19. The rack 302 of the middle clamp 3 passes through the base hole 401. The rack 302 is engaged with the left gear 16 and the right gear 17 respectively. The base hole 401 allows the rack 302 to pass through, and the two are movably connected. The base hole can limit the rack in the horizontal direction.

[0015] Furthermore, the lifting and lowering movement of the rack 302 drives the rotation of the left gear 16 and the right gear 17; thereby, through the left connecting rod 102 and the right connecting rod 202, the left arc clamping plate 101 and the right arc clamping plate 201 rotate, and together with the middle arc clamping plate 301, they form the enclosure or opening of the arc groove.

[0016] Furthermore, the arc of the arc groove formed by the left arc clamping plate 101, the right arc clamping plate 201, and the middle arc clamping plate 301 is greater than or equal to 180 degrees.

[0017] When the leaky cable is placed into the arc-shaped groove formed by the left arc clamp 101, right arc clamp 201, and middle arc clamp 301, the weight of the leaky cable will cause the middle clamp 3 to sink. The rack 302 will drive the left gear 16 and right gear 17 to mesh, and the left connecting rod 102 and right connecting rod 202 will respectively drive the left arc clamp 101 and right arc clamp 201 to rotate towards the middle clamp 3, ultimately clamping the leaky cable on both sides. The heavier the leaky cable, the greater the clamping force, which can effectively fix the leaky cable. After the test, simply lift the leaky cable. As the load decreases, the left arc clamp 101 and right arc clamp 201 will rotate away from the middle clamp 3, and the clamp will automatically release.

[0018] Meanwhile, the rack 302 can be raised and lowered by manually pulling the rack cap 303, thereby adjusting the relative positions of the left, middle and right arc plates of the clamp, that is, adjusting the opening and closing of the entire clamp and adjusting the tightness of the clamp when holding the leaky cable.

[0019] Although the present invention has been described with reference to exemplary embodiments, it should be understood that the present invention is not limited to the disclosed exemplary embodiments. The appended claims should be interpreted in the broadest possible sense to encompass all such variations and equivalent structures and functions.

Claims

1. A quick-release and fixing clamp for leaky coaxial cables used in railway communication, characterized in that, include: Left clamp, right clamp, middle clamp, base, among which, The left clamp includes: a left arc-shaped clamping plate and a left connecting rod, wherein the left arc-shaped clamping plate is fixed to one end of the left connecting rod; The right clamp includes: a right arc-shaped clamping plate and a right connecting rod, wherein the right arc-shaped clamping plate is fixed to one end of the right connecting rod; The middle clamp includes: a middle arc clamping plate, a rack, and a rack cap. The middle arc clamping plate is fixed to one end of the rack, and the rack cap is fixed to the other end of the rack. The base is provided with a left support, a base hole, and a right support. The left support includes a left front support and a left rear support, and the right support includes a right front support and a right rear support. Both the left front support and the left rear support have left support holes. A left pin is provided between the left front support and the left rear support. The two ends of the left pin are movably connected to the left support holes. A left gear is provided on the left pin. The other end of the left connecting rod is connected to the left pin. The left gear drives the left connecting rod to rotate around the left support through the left pin. Both the right front support and the right rear support are provided with right support holes. A right pin is provided between the right front support and the right rear support. Both ends of the right pin are movably connected to the right support holes. A right gear is provided on the right pin. The other end of the right connecting rod is connected to the right pin. The right gear drives the right connecting rod to rotate around the right support through the right pin. The rack of the middle clamp passes through the base hole; The rack engages with the left gear and the right gear respectively.

2. The quick-release and fixing clamp for leaky coaxial cables in railway communication according to claim 1, characterized in that: The lifting and lowering movement of the rack drives the rotation of the left gear and the right gear, which in turn drives the rotation of the left arc clamp and the right arc clamp through the left connecting rod and the right connecting rod, forming the enclosure or opening of the arc groove together with the middle arc clamp.

3. The quick-release and fixing clamp for leaky coaxial cables in railway communication according to claim 2, characterized in that: The arc of the arc groove formed by the left arc clamp, the right arc clamp, and the middle arc clamp together is greater than or equal to 180 degrees.

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