Safety warning device for municipal road pipeline construction

Abstract

The utility model discloses a safety warning device for municipal road pipeline construction, and relates to the technical field of municipal engineering construction safety equipment. The safety warning device for municipal road pipeline construction comprises a supporting connecting column, a swing warning board is arranged at the top end of the supporting connecting column, and a supporting tripod is arranged at the bottom end of the supporting connecting column; the position of a triangular foot support is adjusted by adjusting a rotating handle for supporting, meanwhile, the gravity center of the whole device can be adjusted by controlling a balance weight lead block to ascend and descend, the device is nailed into the ground in cooperation with a fixing nail, the device is helped to fix the road surface, and the whole stability of the device is enhanced; and the spring supporting plate and the reset spring at the two ends of the transmission rack play a role in buffering and returning, so that the warning board can continuously swing to attract the attention of the pedestrians and the vehicle drivers, and the effect of improving the warning distinguishing degree is achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of safety equipment for municipal engineering construction, specifically a safety warning device for municipal road pipeline construction. Background Technology

[0002] During the construction of pipelines on municipal roads, the environment is complex and there are many uncertainties. The construction area will change the original traffic conditions of the road. In order to ensure the safety of construction and the safety of pedestrians and vehicles, it is necessary to set up safety warning devices to indicate the existence of the construction area, guide pedestrians and vehicles to bypass the dangerous area, avoid safety accidents, and ensure the smooth progress of construction.

[0003] The existing technology has the following problems:

[0004] Existing warning devices typically include simple placement devices such as warning signs, traffic cones, and construction barriers. Ordinary fixed warning signs rely on their own weight or simple connections for fixation. When encountering external forces such as strong winds or vehicle collisions, they are prone to tipping over or shifting, thus failing to serve their warning purpose. Relying solely on their own weight results in a high center of gravity and poor stability, making it difficult to cope with complex construction sites and external interference. Furthermore, traditional fixed warning signs are stationary and are not easily noticed by pedestrians and drivers in busy municipal road environments. Stationary warning signs are easily overlooked and cannot promptly remind them of the construction area, posing a significant safety hazard. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a safety warning device for municipal road pipeline construction, which solves the problems of easy tipping over and low visibility.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a safety warning device for municipal road pipeline construction, comprising a supporting connecting column, a swing warning sign being provided at the top of the supporting connecting column, and a supporting tripod being provided at the bottom of the supporting connecting column.

[0007] Preferably, the supporting tripod includes an adjustable rotary handle, the inner side of which is rotatably connected to the lowest side of the outer surface of the supporting connecting column. A transmission threaded column is fixedly connected to the bottom end of the adjustable rotary handle. Both the inner and outer sides of the transmission threaded column are threaded. A triangular foot support is threadedly connected to the outer surface of the transmission threaded column. A supporting base is rotatably connected to the bottom end of the transmission threaded column. A counterweight base is fixedly connected to the bottom end of the supporting base. Several friction rubber strips are fixedly connected to the outer side of the bottom end of the counterweight base. The counterweight base and the supporting base share a through-hole in the middle. The fixing hole communicates with the inner side of the transmission threaded column. A ground-penetrating fixing component is provided inside the fixing hole.

[0008] Preferably, the triangular support includes a movable support ring, the inner side of which is threaded to the outer surface of a transmission threaded column. Three transmission support blocks are uniformly fixedly connected to the outer surface of the movable support ring. A support foot is rotatably connected to the end of each transmission support block away from the movable support ring. A support rubber head is fixedly connected to the end of each support foot away from the transmission support block. A connecting auxiliary support rod is rotatably connected to the middle of the outer surface of the support foot. The end of the connecting auxiliary support rod away from the support foot is rotatably connected to the inside of the support base. The connecting auxiliary support rod has a support foot storage groove that allows the support foot and the support rubber head to enter.

[0009] Preferably, the ground-penetrating fixing assembly includes a guide rod, which is square and slidably connected to the inside of the support connecting column. The bottom end of the guide rod extends to the inner outer side of the support base. A plurality of counterweight lead blocks are sleeved and connected to the outer surface of the guide rod. A displacement cylinder shell is fixedly connected to the outer surface of the counterweight lead blocks. The outer surface of the displacement cylinder shell is threaded to the inner side of the transmission thread column. A support plate is fixedly connected to the bottom end of the guide rod. A storage spring is fixedly connected to the outer side of the top end of the support plate. A storage support plate is fixedly connected to the top end of the storage spring and sleeved on the outer surface of the guide rod. A support spring is fixedly connected to the outer side of the bottom end of the support plate. The bottom end of the support spring is fixedly connected to the top end of the counterweight base. A fixing nail, which is inverted conical, is fixedly connected to the middle of the bottom end of the support plate.

[0010] Preferably, the swing warning sign includes a flow guide warning sign, with warning posts fixedly connected to both the left and right ends of the flow guide warning sign. Several vertically parallel reflective strips are fixedly connected to the outer surface of the warning posts. A support post is fixedly connected to the bottom end of the flow guide warning sign. A limit slot is provided on the lower side of the outer surface of the support post. A limit block is fixedly connected to the bottom end of the support post. A swing base is provided below the support post, and the middle of the bottom end of the swing base is fixedly connected to the top end of the support post.

[0011] Preferably, the rocking base includes a base body, the bottom center of which is fixedly connected to the top of a supporting column. A rocking gear is rotatably connected to the bottom center of the inner side of the base body. A transmission slot for a limiting block is opened at the top center of the rocking gear. Transmission racks are meshed on both the front and rear sides of the rocking gear. The transmission racks are slidably connected to the inner side of the base body. Spring support plates are fixedly connected to both the left and right ends of the transmission racks. A return spring is fixedly connected to the end of the spring support plate away from the transmission rack. The end of the return spring away from the spring support plate is fixedly connected to the inside of the base body. A connection port for simultaneous connection between the limiting block and the supporting column is opened at the top of the base body. A release port is opened at the front of the top of the base body. An L-shaped limiting buckle is slidably connected to the front of the inside of the base body. The vertical top of the limiting buckle extends to the outer side of the top of the base body through the release port. A fitting arc opening for entering the limiting slot is opened at the rear end of the limiting buckle in the horizontal direction. Two buckle springs are fixedly connected to the front end of the limiting buckle. The front ends of the buckle springs are fixedly connected to the inner side of the base body.

[0012] This utility model provides a swing warning sign and a supporting tripod. Compared with the prior art, it has the following advantages:

[0013] Beneficial effects:

[0014] 1. This safety warning device for municipal road pipeline construction enhances stability through a supporting tripod and ground-penetrating fixing components. By adjusting the position of the triangular foot support with the rotating handle, the device's overall center of gravity can be adjusted by controlling the rise and fall of the counterweight. In conjunction with the fixing nails driven into the ground, the device can break through the hard construction environment by using a storage spring to help fix the device to the road surface, thereby enhancing the overall stability of the device and improving its ability to resist external interference.

[0015] 2. This safety warning device for municipal road pipeline construction uses a swinging base and a guide warning sign to swing with the help of wind, attracting the attention of pedestrians and drivers. When the wind blows, the guide warning sign causes the support column to sway, which in turn drives the swinging gear to rotate. The swinging gear meshes with the transmission rack, causing the transmission rack to slide within the base body. The spring support plates and return springs at both ends of the transmission rack provide buffering and return functions, allowing the warning sign to swing continuously. This makes it more conspicuous in the busy environment of municipal roads with pedestrians and vehicles, making it easier to attract the attention of pedestrians and drivers and improving the warning recognition effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the tripod structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the ground-penetrating fixing component of this utility model;

[0019] Figure 4 This is a schematic diagram of the swing warning sign structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the swing base structure of this utility model;

[0021] Figure 6 This is a schematic diagram of the storage state of this utility model.

[0022] In the diagram: 1. Swinging warning sign; 11. Directional warning sign; 12. Warning post; 13. Reflective strip; 14. Support post; 15. Limiting slot; 16. Limiting block; 17. Swinging base; 171. Base body; 172. Transmission rack; 173. Spring support plate; 174. Return spring; 175. Transmission slot; 176. Swinging gear; 177. Limiting buckle; 178. Connecting socket; 179. Release port; 2. Support connecting post; 3. Support tripod; 31. Adjustable rotating handle; 32. Transmission screw 33. Patterned column; 34. Triangular foot support; 35. Moving support ring; 36. Transmission support block; 37. Support foot; 38. Linkage auxiliary support rod; 39. Support foot storage groove; 30. Support rubber head; 31. Support base; 32. Counterweight base; 33. Friction rubber strip; 34. Fixing hole; 35. Ground-penetrating fixing component; 36. Guide rod; 37. Counterweight lead block; 38. Displacement cylinder shell; 388. Energy storage plate; 39. Energy storage spring; 30. Support plate; 31. Support spring; 32. Fixing nail. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-5 This utility model provides a technical solution: a safety warning device for municipal road pipeline construction, including a supporting connecting column 2, a swing warning sign 1 at the top of the supporting connecting column 2, and a supporting tripod 3 at the bottom of the supporting connecting column 2.

[0025] During the construction of municipal road pipelines, the supporting connecting column 2 plays a connecting role, firmly connecting the swing warning sign 1 at the top and the supporting tripod 3 at the bottom. By operating the supporting tripod 3, it can adapt to different ground conditions, thereby providing a stable support foundation for the entire device, so that the device can stand firmly on the construction site. The swing warning sign 1 begins to swing under the action of natural wind, thereby attracting the attention of pedestrians and drivers and serving as a warning.

[0026] Please see Figure 2 The tripod 3 includes an adjustable rotary handle 31, which is rotatably connected to the bottom of the outer surface of the supporting connecting column 2. The bottom of the adjustable rotary handle 31 is fixedly connected to a transmission threaded column 32, which is threaded on both the inner and outer sides. A triangular foot support 33 is threaded on the outer surface of the transmission threaded column 32. The bottom of the transmission threaded column 32 is rotatably connected to a supporting base 34. The bottom of the supporting base 34 is fixedly connected to a counterweight base 35. Several friction rubber strips 36 are fixedly connected to the outer side of the bottom of the counterweight base 35. The counterweight base 35 and the supporting base 34 have a through-hole 37 in the middle. The through-hole 37 communicates with the inner side of the transmission threaded column 32. A ground-penetrating fixing component 38 is provided inside the through-hole 37.

[0027] Rotating the control handle 31 can drive the transmission threaded column 32 to rotate. The outer surface of the transmission threaded column 32 is threadedly connected to the triangular foot support 33. Its rotation will cause the triangular foot support 33 to move up and down along the transmission threaded column 32, thereby adjusting the position of the triangular foot support 33 for support. The counterweight base 35 can increase the overall stability of the device. The friction rubber strip 36 can increase the friction with the ground. The ground-penetrating fixing component 38, when the transmission threaded column 32 rotates, is driven by it and, through its own structural changes, further fixes the device, improves the overall stability, and ensures that the warning device is stable in complex construction environments.

[0028] Please see Figure 2 The triangular support 33 includes a movable support ring 331. The inner side of the movable support ring 331 is threaded to the outer surface of the transmission threaded column 32. Three transmission support blocks 332 are evenly fixedly connected to the outer surface of the movable support ring 331. A support foot 333 is rotatably connected to the end of the transmission support block 332 away from the movable support ring 331. A support rubber head 336 is fixedly connected to the end of the support foot 333 away from the transmission support block 332. A connecting auxiliary support rod 334 is rotatably connected to the middle of the outer surface of the support foot 333. The end of the connecting auxiliary support rod 334 away from the support foot 333 is rotatably connected to the inside of the support base 34. The connecting auxiliary support rod 334 has a support foot storage groove 335 that can enter the support foot 333 and the support rubber head 336.

[0029] When the movable support ring 331 moves, the three transmission support blocks 332 fixed on its outer surface move together, thereby driving the support foot 333 to move. The support rubber head 336 contacts the ground to provide support force. During the movement of the support foot 333, the linkage auxiliary support rod 334 will rotate to play an auxiliary support role. When the device needs to be stored, the support foot 333 and the support rubber head 336 can be put into the support foot storage slot 335 opened in the linkage auxiliary support rod 334, which facilitates the storage and transportation of the device.

[0030] Please see Figure 3 The ground-penetrating fixing component 38 includes a guide rod 381, which is square and slidably connected to the inside of the support connecting column 2. The bottom end of the guide rod 381 extends to the inner outer side of the support base 34. Several counterweight lead blocks 382 are sleeved and connected to the outer surface of the guide rod 381. A displacement cylinder shell 383 is fixedly connected to the outer surface of the counterweight lead blocks 382. The outer surface of the displacement cylinder shell 383 is threaded to the inner side of the transmission thread column 32. A support plate 386 is fixedly connected to the bottom end of the guide rod 381. A storage spring 385 is fixedly connected to the outer side of the top end of the support plate 386. A storage support plate 384 is fixedly connected to the top end of the storage spring 385. The storage support plate 384 is sleeved on the outer surface of the guide rod 381. A support spring 387 is fixedly connected to the outer side of the bottom end of the support plate 386. The bottom end of the support spring 387 is fixedly connected to the top end of the counterweight base 35. A fixing nail 388 is fixedly connected to the middle of the bottom end of the support plate 386. The fixing nail 388 is inverted conical.

[0031] When the control handle 31 is rotated, the transmission threaded column 32 rotates accordingly. The displacement cylinder 383, which is connected to the inner thread of the transmission threaded column 32, moves up and down under the restriction of the guide rod 381. The counterweight lead block 382 moves together with the displacement cylinder 383, ensuring the stability of the entire movement process. The counterweight lead block 382 pushes the energy storage plate 384, which in turn pushes the fixing nail 388 closer to the ground. When the fixing nail 388 contacts the ground, if the ground is hard and it is difficult to drive it in directly, the energy storage plate 384 will compress the energy storage spring 385 at the bottom. When the energy storage reaches a certain level, the energy storage spring 385 releases its elasticity to push the support plate 386, allowing the fixing nail 388 to be driven into the ground more forcefully, firmly fixing the device and improving the stability of the warning device at the construction site.

[0032] Please see Figure 4The swing warning sign 1 includes a guide warning sign 11. Both ends of the guide warning sign 11 are fixedly connected to warning posts 12. Several vertically parallel reflective strips 13 are fixedly connected to the outer surface of the warning posts 12. The bottom end of the guide warning sign 11 is fixedly connected to a support post 14. A limit slot 15 is opened on the lower side of the outer surface of the support post 14. A limit block 16 is fixedly connected to the bottom end of the support post 14. A swing base 17 is provided below the support post 14. The middle part of the bottom end of the swing base 17 is fixedly connected to the top end of the support connecting post 2.

[0033] When there is wind, the wind will blow the guide warning sign 11 of the swing warning sign 1. The guide warning sign 11 is under force and causes the warning column 12 to shake, which in turn causes the reflective strip 13 to shake to enhance the warning effect. The support column 14 will rotate with the shaking of the guide warning sign 11. The limit block 16 and the swing base 17 below cooperate to provide a lasting rotational force for the support column 14.

[0034] Please see Figure 5 The rocking base 17 includes a base body 171. The bottom center of the base body 171 is fixedly connected to the top of the support connecting column 2. A rocking gear 176 is rotatably connected to the bottom center of the inner side of the base body 171. A transmission slot 175 is provided at the top center of the rocking gear 176, which can enter the limiting block 16. A transmission rack 172 is meshed with both the front and rear sides of the rocking gear 176. The transmission rack 172 is slidably connected to the inner side of the base body 171. Spring support plates 173 are fixedly connected to both the left and right ends of the transmission rack 172. A return spring 174 is fixedly connected to the end of the spring support plate 173 away from the transmission rack 172. The return spring 174 is away from the spring support plate. One end of 173 is fixedly connected to the inside of the base body 171. The top of the base body 171 has a connection port 178 that can be connected to the support column 14 through the limiting block 16 at the same time. The front side of the top of the base body 171 has a release port 179. The front side of the inside of the base body 171 is slidably connected to an L-shaped limiting buckle 177. The top of the limiting buckle 177 extends through the release port 179 to the outside of the top of the base body 171. The rear end of the limiting buckle 177 in the horizontal direction has a fitting arc opening that can enter the limiting slot 15. The front end of the limiting buckle 177 is fixedly connected to two buckle springs, and the front end of the buckle springs is fixedly connected to the inside of the base body 171.

[0035] When the wind causes the support column 14 of the traffic guidance warning sign 11 to sway, the limiting block 16 is inserted into the transmission slot 175 at the top of the swing gear 176, causing the swing of the support column 14 to drive the swing gear 176 to rotate. The transmission racks 172 on the front and rear sides will mesh and slide inside the base body 171. The spring support plate 173 and the return spring 174 can buffer and return the transmission rack 172, allowing the transmission rack 172 to slide smoothly and return to the initial position after the swing stops, thereby maintaining the continuous rotation of the swing gear 176 and realizing the continuous swing of the swing warning sign 1.

[0036] To remove the swing warning sign 1, press the limit buckle 177 forward. The buckle spring fixed at the front end of the limit buckle 177 is compressed, and the fitting arc at the rear end of the limit buckle 177 in the horizontal direction disengages from the limit groove 15 on the outer surface of the support column 14. At this time, the support column 14 can be removed from the swing base 17.

[0037] Please see Figure 1-6 At work,

[0038] First, while holding the support connecting column 2, rotate the adjustment handle 31 to rotate the transmission threaded column 32, causing the moving support ring 331 of the triangular foot support 33 to move up and down along the transmission threaded column 32, adjusting the opening angle of the three support legs 333. At the same time, the counterweight lead block 382 pushes the fixing nail 388 into the ground, and the friction rubber strip 36 on the bottom of the counterweight base 35 enhances the anti-slip property. Align the limiting block 16 of the support column 14 with the connecting socket 178 and insert it, so that the limiting block 16 is engaged in the transmission slot 175. The limiting buckle 177 automatically engages with the limiting slot 15 at its fitting arc opening, thus fixing the swing warning sign 1. At this time, the reflective strip 13 and warning post 12 of the guide warning sign 11 are in a vertical state. Under the action of natural wind, the guide warning sign 11 drives the support post 14 to swing, and drives the swing gear 176 to rotate through the limiting block 16. The swing gear 176 meshes with the transmission rack 172, which drives the spring support plate 173 to slide back and forth under the action of the return spring 174, so that the swing warning sign 1 keeps in a continuous swinging state.

[0039] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A safety warning device for municipal road pipeline construction, comprising a supporting connecting column (2), characterized in that: A swing warning sign (1) is provided at the top of the supporting connecting column (2), and a supporting tripod (3) is provided at the bottom of the supporting connecting column (2). The supporting tripod (3) includes an adjustment rotating handle (31). The inner side of the adjustment rotating handle (31) is rotatably connected to the lowest side of the outer surface of the supporting connecting column (2). A transmission threaded column (32) is fixedly connected to the bottom of the adjustment rotating handle (31). The inner and outer sides of the transmission threaded column (32) are threaded. A triangular foot support is threaded on the outer surface of the transmission threaded column (32). (33) The bottom end of the transmission threaded column (32) is rotatably connected to a support base (34), the bottom end of the support base (34) is fixedly connected to a counterweight base (35), and a number of friction rubber strips (36) are fixedly connected to the outer side of the bottom end of the counterweight base (35). The counterweight base (35) and the support base (34) are provided with a through-hole (37) in the middle. The through-hole (37) communicates with the inner side of the transmission threaded column (32), and a ground-penetrating fixing component (38) is provided inside the through-hole (37).

2. The safety warning device for municipal road pipeline construction according to claim 1, characterized in that: The triangular support (33) includes a movable support ring (331). The inner side of the movable support ring (331) is threaded to the outer surface of the transmission threaded column (32). Three transmission support blocks (332) are evenly fixedly connected to the outer surface of the movable support ring (331). A support foot (333) is rotatably connected to one end of the transmission support block (332) away from the movable support ring (331). A support rubber head (336) is fixedly connected to one end of the support foot (333) away from the transmission support block (332). A connecting auxiliary support rod (334) is rotatably connected to the middle of the outer surface of the support foot (333). One end of the connecting auxiliary support rod (334) away from the support foot (333) is rotatably connected to the inside of the support base (34). The connecting auxiliary support rod (334) has a support foot storage groove (335) that can enter the support foot (333) and the support rubber head (336).

3. A safety warning device for municipal road pipeline construction according to claim 2, characterized in that: The ground-penetrating fixing assembly (38) includes a guide rod (381), which is square and slidably connected to the inside of the support connecting column (2). The bottom end of the guide rod (381) extends to the inside and outside of the support base (34). Several counterweight lead blocks (382) are sleeved and connected to the outer surface of the guide rod (381). A displacement cylinder shell (383) is fixedly connected to the outer surface of the counterweight lead blocks (382). The outer surface of the displacement cylinder shell (383) is threaded to the inside of the transmission threaded column (32). The bottom end of the guide rod (381) is fixed. A support plate (386) is connected, and a storage spring (385) is fixedly connected to the outer side of the top of the support plate (386). A storage support plate (384) is fixedly connected to the top of the storage spring (385). The storage support plate (384) is sleeved on the outer surface of the guide rod (381). A support spring (387) is fixedly connected to the outer side of the bottom end of the support plate (386). The bottom end of the support spring (387) is fixedly connected to the top of the counterweight base (35). A fixing nail (388) is fixedly connected to the middle of the bottom end of the support plate (386). The fixing nail (388) is inverted conical.

4. A safety warning device for municipal road pipeline construction according to claim 1, characterized in that: The swing warning sign (1) includes a flow guide warning sign (11). The left and right ends of the flow guide warning sign (11) are fixedly connected to warning posts (12). Several parallel reflective strips (13) are fixedly connected to the outer surface of the warning posts (12). The bottom end of the flow guide warning sign (11) is fixedly connected to a support post (14). A limit slot (15) is opened on the lower side of the outer surface of the support post (14). A limit block (16) is fixedly connected to the bottom end of the support post (14). A swing base (17) is provided below the support post (14). The middle part of the bottom end of the swing base (17) is fixedly connected to the top of the support connecting post (2).

5. A safety warning device for municipal road pipeline construction according to claim 4, characterized in that: The rocking base (17) includes a base body (171). The bottom center of the base body (171) is fixedly connected to the top of the support connecting column (2). A rocking gear (176) is rotatably connected to the bottom center of the inner side of the base body (171). A transmission slot (175) for entering the limiting block (16) is opened at the top center of the rocking gear (176). A transmission rack (172) is meshed with the front and rear sides of the rocking gear (176). The transmission rack (172) is slidably connected to the inner side of the base body (171). Spring support plates (173) are fixedly connected to the left and right ends of the transmission rack (172). A return spring (174) is fixedly connected to the end of the spring support plate (173) away from the transmission rack (172). The return spring (174) is away from the spring rack (172). One end of the spring support plate (173) is fixedly connected to the inside of the base body (171). The top of the base body (171) is provided with a connection port (178) that can be simultaneously connected to the support column (14) through the limiting block (16). The front side of the top of the base body (171) is provided with a release port (179). The front side of the inside of the base body (171) is slidably connected with an L-shaped limiting buckle (177). The top of the limiting buckle (177) in the vertical direction extends to the outside of the top of the base body (171) through the release port (179). The rear end of the limiting buckle (177) in the horizontal direction is provided with a fitting arc opening that can enter the limiting slot (15). The front end of the limiting buckle (177) is fixedly connected with two buckle springs. The front end of the buckle springs is fixedly connected to the inside of the base body (171).

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