A clamping device

Abstract

The present application relates to the field of pipeline replacement, and discloses a clamping device, which comprises a main body, a slip assembly and a reset assembly, the slip assembly comprises two slips which are oppositely arranged and rotatably arranged on the main body, and the reset assembly comprises two reset devices which are arranged on the main body and connected with the two slips respectively, the first end and the second end of the slip are symmetrically provided with a first clamping surface and a second clamping surface, the gap between the two slips is smaller than the outer diameter of a connecting joint of a rod, in a rod feeding state, the slip rotates, the connecting joint passes through the two slips from the first end of the slip, and the two first clamping surfaces are in close contact with the outer surface of the rod, in a rod pulling state, the slip rotates, the connecting joint passes through the two slips from the second end of the slip, and the two second clamping surfaces are in close contact with the outer surface of the rod. The clamping device can realize feeding and pulling of the rod.

Description

Technical Field

[0001] This invention relates to the field of pipe replacement, and in particular to a clamping device. Background Technology

[0002] With the acceleration of urbanization in my country, sewage pipes buried underground for a long time can no longer meet the needs of sewage discharge. At present, the most common method for replacing old pipes is the trenchless in-situ replacement method.

[0003] As attached Figure 5 As shown, trenchless in-situ replacement refers to setting up entry pits and equipment pits at both ends of the pipeline. A linear expansion joint is installed in the equipment pit, and a breaking expansion head is installed in the entry pit, connected to the new pipeline. The static tensile force generated by the linear expansion joint is transmitted to the breaking expansion head through a rod, breaking up the old pipeline and squeezing it into the surrounding soil, while simultaneously pulling in the new pipeline. Trenchless in-situ replacement has the advantages of not affecting traffic and minimizing environmental damage. However, in current construction processes, there is a lack of equipment for inserting and pulling out the rods. Therefore, how to provide a device that can realize the insertion and pulling out of the rods has become a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] To solve the above technical problems, the present invention provides a clamping device capable of feeding and pulling out rods.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] This invention provides a clamping device, comprising a main body, a slip assembly, and a reset assembly. The slip assembly includes two oppositely arranged slips, each slip rotatably mounted on the main body. The reset assembly includes two reset devices, each reset device mounted on the main body, corresponding one-to-one with and connected to the two slips. The slips have symmetrically arranged first and second clamping surfaces at their first and second ends. A rod includes a rod body and two connecting joints at both ends of the rod body. The rod body and the connecting joints are coaxially arranged. The outer diameter of the connecting joints is larger than the outer diameter of the rod body. The gap between the two slips is smaller than the outer diameter of the connecting joints. In the rod-feeding state, the slips rotate, and the connecting joints pass through the gap between the two slips from their first ends, with both first clamping surfaces abutting the outer surface of the rod. In the rod-pulling state, the slips rotate, and the connecting joints pass through the gap between the two slips from their second ends, with both second clamping surfaces abutting the outer surface of the rod.

[0007] Preferably, the first clamping surface comprises a first arc surface, the second clamping surface comprises a second arc surface, in the rod feeding state, the two first arc surfaces are in close contact with the rod body, and in the rod pulling state, the two second arc surfaces are in close contact with the rod body.

[0008] Preferably, the rod further comprises two transition cone surfaces, the transition cone surfaces are coaxially arranged between the connecting joints and the rod body, the large end diameter of the transition cone surface is equal to the outer diameter of the connecting joint, the small end diameter of the transition cone surface is equal to the outer diameter of the rod body, the large end and the small end of the transition cone surface are connected with the connecting joint and the rod body respectively, the first clamping surface comprises a first inclined surface, the second clamping surface comprises a second inclined surface, in the rod feeding state, the two first inclined surfaces are in close contact with the transition inclined surface, and in the rod pulling state, the two second inclined surfaces are in close contact with the transition inclined surface.

[0009] Preferably, the clamping device further comprises two guide assemblies oppositely arranged at both ends of the slip assembly, each guide assembly comprises two oppositely arranged guide wheels, each guide wheel is rotatably arranged on the main body, and the gap for the rod to pass through is formed between the two guide wheels.

[0010] Preferably, the clamping device further comprises a support assembly, the support assembly comprises two support seats arranged at both ends of the slip assembly, and the support seats are used to support the rod.

[0011] Preferably, the main body comprises a bottom plate, an upper cover plate and a lower plate body oppositely arranged, an installation cavity with open ends is formed between the upper cover plate and the lower plate body, the slips are arranged in the installation cavity, and two guide grooves are symmetrically arranged on both sides of the lower plate body.

[0012] Preferably, the clamping device further comprises a connecting shaft and a slip shaft, the upper cover plate and the lower plate body are connected through the connecting shaft, the number of the slip shafts is two, the two slip shafts correspond to the two slips one by one, each slip is sleeved on the corresponding slip shaft, the two ends of the slip shaft are rotatably arranged on the upper cover plate and the lower plate body respectively, and the two ends of the slip shaft are provided with first wear-resistant sleeves.

[0013] Preferably, the lower plate body comprises a lower cover plate and a bottom plate, the lower cover plate is oppositely arranged with the upper cover plate and forms the installation cavity therebetween, the bottom plate is arranged below the lower cover plate, and inverted L-shaped recesses are symmetrically arranged at the bottom end of the lower cover plate, the guide grooves are formed between each recess and the upper end surface of the bottom plate.

[0014] Preferably, the clamping device further comprises two handles, and each of the handles is arranged on the slip.

[0015] Preferably, the reset device is a spring.

[0016] The present application has the following technical effects relative to the prior art:

[0017] The clamping device comprises a main body, a slip assembly and a reset assembly. The slip assembly comprises two oppositely arranged slips, each of which is rotatably arranged on the main body. The reset assembly comprises two reset devices, each of which is arranged on the main body. The two reset devices correspond to the two slips one by one and are connected. The first end and the second end of the slip are symmetrically provided with a first clamping surface and a second clamping surface. The rod member comprises a rod body and two connecting joints arranged at both ends of the rod body. The rod body and the connecting joints are coaxially arranged. The outer diameter of the connecting joint is larger than the outer diameter of the rod body. The gap between the two slips is smaller than the outer diameter of the connecting joint.

[0018] In the specific use process, the linear extension and contraction device is elongated and contracted to realize the rod pulling and rod feeding operations. In addition, when in the rod feeding state, the slip is rotated, one of the two connecting joints passes through the two slips from the first end of the slip, and the two first clamping surfaces are in close contact with the outer surface of the rod member. After the rod feeding is in place, the linear extension and contraction device is contracted, the slip is rotated to enable the other connecting joint to pass through the two slips, so that the separation of the rod member and the clamping device can be realized. When in the rod pulling state, the slip is rotated, one of the two connecting joints passes through the two slips from the second end of the slip, and the two second clamping surfaces are in close contact with the outer surface of the rod member. After the rod pulling is in place, the linear extension and contraction device is elongated, the slip is rotated to enable the other connecting joint to pass through the two slips, so that the separation of the rod member and the clamping device can be realized. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0020] Figure 1 The figure is a schematic view of the cooperation mode of the clamping device, the rod member and the linear extension and contraction device provided in the embodiment of the present application.

[0021] Figure 2 The figure is a structural schematic view of the clamping device provided in the embodiment of the present application.

[0022] Figure 3 The figure is a partial structural schematic view of the clamping device. Figure 2 ​

[0023] Figure 4 Structure diagram of the clamping device slip provided in the embodiment of the present application is shown in the figure.

[0024] Figure 5 The replacement mode diagram of replacing the pipeline by using the trenchless original position replacement method.

[0025] The figure mark explanation: 100, clamping device; 1, slip; 2, reset device; 3, first clamping surface; 301, first arc surface; 302, first inclined surface; 4, second clamping surface; 401, second arc surface; 402, second inclined surface; 5, rod body; 6, connecting joint; 7, transition conical surface; 8, guide wheel; 9, support seat; 10, bottom plate; 11, upper cover plate; 12, mounting cavity; 13, connecting shaft; 14, slip shaft; 15, rotating shaft; 16, guide groove; 17, handle; 18, ear plate; 19, straight line telescopic device; 20, pipe entering pit; 21, equipment pit; 22, broken expansion head; 23, old pipeline; 24, new pipeline. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0027] The purpose of the present application is to provide a clamping device capable of realizing rod feeding and pulling out.

[0028] In order to make the above-mentioned purpose, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0029] Reference Figures 1-5 As shown in the figure, the clamping device 100 provided in the embodiment includes a main body, a slip assembly and a reset assembly. The slip assembly includes two oppositely arranged slips 1, each of which is rotatably arranged on the main body. The reset assembly includes two reset devices 2, each of which is arranged on the main body. The two reset devices 2 correspond to the two slips 1 one by one and are connected. The first end and the second end of the slip 1 are symmetrically provided with the first clamping surface 3 and the second clamping surface 4. The rod member includes the rod body 5 and the two connecting joints 6 arranged at both ends of the rod body 5. The rod body 5 and the connecting joint 6 are coaxially arranged. The outer diameter of the connecting joint 6 is greater than the outer diameter of the rod body 5. The gap between the two slips 1 is smaller than the outer diameter of the connecting joint 6.

[0030] In the specific use process, the straight telescopic device 19 is extended and contracted to realize the rod pulling and rod feeding operations. In addition, in the rod feeding state, the slips are rotated, one of the two connecting joints 6 passes through the two slips 1 from the first end of the slip 1, the two first clamping surfaces 3 are in close contact with the outer surface of the rod, and after the rod is fed to the position, the straight telescopic device 19 is contracted, the other connecting joint 6 can pass through the two slips 1 by rotating the slip 1, and the rod and the clamping device 100 can be separated. In the rod pulling state, the slip is rotated, one of the two connecting joints 6 passes through the two slips 1 from the second end of the slip 1, the two second clamping surfaces 4 are in close contact with the outer surface of the rod, and after the rod is pulled to the position, the straight telescopic device 19 is extended, the other connecting joint 6 can pass through the two slips 1 by rotating the slip 1, and the rod and the clamping device 100 can be separated. The clamping device 100 can realize the feeding and pulling of the rod.

[0031] It should be noted that in the specific use process, multiple rods need to be fed and pulled out, and the multiple rods are connected to each other through the connecting joints 6. For example, the two connecting joints 6 of the two rods are provided with internal threads and external threads, respectively, and the external threads can be threadedly connected with the internal threads.

[0032] In this embodiment, as shown in Figure 4 The first clamping surface 3 includes a first arc surface 301, and the second clamping surface 4 further includes a second arc surface 401. In the rod feeding state, the two first arc surfaces 301 are in close contact with the rod body 5. In the rod pulling state, the two second arc surfaces 401 are in close contact with the rod body 5.

[0033] In this embodiment, as shown in Figure 1 The rod further includes two transition tapered surfaces 7, and the transition tapered surfaces 7 are coaxially arranged between the two connecting joints 6 and the rod body 5. The large end diameter of the transition tapered surface 7 is equal to the outer diameter of the connecting joint 6, the small end diameter of the transition tapered surface 7 is equal to the outer diameter of the rod body 5, the large end and the small end of the transition tapered surface 7 are connected with the connecting joint 6 and the rod body 5 respectively, the first clamping surface 3 includes a first inclined surface 302, and the second clamping surface 4 includes a second inclined surface 402. In the rod feeding state, the two first inclined surfaces 302 are in close contact with the transition inclined surface. In the rod pulling state, the two second inclined surfaces 402 are in close contact with the transition inclined surface.

[0034] In this embodiment, as shown in Figures 2-3 The clamping device 100 further includes two guide assemblies oppositely arranged at the two ends of the slip assembly. Each guide assembly includes two oppositely arranged guide wheels 8, each guide wheel 8 is rotatably arranged on the main body, and the two guide wheels 8 have a gap for the rod to pass through.

[0035] In the embodiment, the clamping device 100 further comprises a support assembly, which comprises two support seats 9 arranged at two ends of the slip assembly, and the support seats 9 are used for supporting the rod member.

[0036] In the embodiment, the main body comprises a bottom plate 10, and an upper cover plate 11 and a lower plate body arranged oppositely, and an installation cavity 12 with open ends is formed between the upper cover plate 11 and the lower plate body, the slips 1 are arranged in the installation cavity 12, and two guide grooves 16 are symmetrically arranged on two sides of the lower plate body. In the specific construction process, a guide rail is arranged in the equipment pit, and the guide rail is arranged in the guide groove 16 and is in sliding connection with the guide groove 16.

[0037] In the embodiment, as shown in the figure, Figures 2-3 the clamping device 100 further comprises a connecting shaft 13 and a slip shaft 14, the upper cover plate 11 and the lower plate body are connected through the connecting shaft 13, the number of the slip shafts 14 is two, the two slip shafts 14 correspond to the two slips 1 one by one, each slip 1 is sleeved on the corresponding slip shaft 14, and the two ends of the slip shaft 14 are rotatably arranged on the upper cover plate 11 and the lower plate body, and the two ends of the slip shaft 14 are provided with first wear-resistant sleeves.

[0038] In the embodiment, as shown in the figure, Figures 2-3 the clamping device 100 further comprises a rotating shaft 15, the number of the rotating shafts 15 is four, the rotating shafts 15 correspond to the guide wheels 8 one by one, each guide wheel 8 is sleeved on the corresponding rotating shaft 15, the two ends of the rotating shaft 15 are rotatably arranged on the upper cover plate 11 and the lower plate body, and the two ends of the rotating shaft 15 are provided with second wear-resistant sleeves.

[0039] In the embodiment, as shown in the figure, Figures 2-3 the lower plate body comprises a lower cover plate and the bottom plate 10, the lower cover plate is arranged opposite to the upper cover plate 11 and forms the installation cavity 12 with the upper cover plate 11, the bottom plate 10 is arranged below the lower cover plate, and the lower cover plate is symmetrically provided with inverted L-shaped recesses on both sides of the bottom end, and each recess and the upper end surface of the bottom plate 10 form a guide groove 16.

[0040] In the embodiment, as shown in the figure, Figures 1-3 in order to facilitate the rotation of the slip 1, the clamping device 100 further comprises two handles 17, and each slip 1 is provided with a handle 17. Further, one end of the reset device 2 is connected with the main body, and the other end is connected with one end of the handle 17. In addition, in the embodiment, the reset device 2 is connected with the upper cover plate 11. In the specific use process, the user rotates the handle to make the slip rotate, so as to realize the clamping and loosening of the rod member.

[0041] In the embodiment, the reset device 2 is a spring. It should be noted that the reset device 2 is not limited to the spring, and other elastic structures can also be selected.

[0042] In this embodiment, as Figures 1-2 As shown, both sides of the main body are provided with ear plates 18 for cooperating with the linear telescopic device 19. In actual construction, there are two linear telescopic devices 19 on the ear plates 18, and the two linear telescopic devices 19 are connected to the two ear plates 18 respectively. Further, the linear telescopic device 19 can be a hydraulic cylinder, and the cylinder rod of the hydraulic cylinder is connected to the ear plate 18.

[0043] This specification uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A clamping device, characterized in that The device comprises a main body, a slip assembly and a reset assembly. The slip assembly comprises two oppositely arranged slips, each of which is rotatably arranged on the main body. The reset assembly comprises two reset devices, each of which is arranged on the main body. The two reset devices correspond to the two slips one by one and are connected. The first end and the second end of the slip are symmetrically provided with a first clamping surface and a second clamping surface. The rod member comprises a rod body and two connecting joints arranged at both ends of the rod body. The rod body and the connecting joints are coaxially arranged. The outer diameter of the connecting joint is larger than the outer diameter of the rod body. The gap between the two slips is smaller than the outer diameter of the connecting joint. In the rod feeding state, the slip rotates, the connecting joint passes through the two slips from the first end of the slip, and the two first clamping surfaces are in contact with the outer surface of the rod member. In the rod pulling state, the slip rotates, the connecting joint passes through the two slips from the second end of the slip, and the two second clamping surfaces are in contact with the outer surface of the rod member. The rod member further comprises two transition cone surfaces arranged between the connecting joints and the rod body. The transition cone surfaces are coaxially arranged with the rod body. The large end diameter of the transition cone surface is equal to the outer diameter of the connecting joint, and the small end diameter of the transition cone surface is equal to the outer diameter of the rod body. The large end and the small end of the transition cone surface are connected with the connecting joint and the rod body respectively. The first clamping surface comprises a first inclined surface, and the second clamping surface comprises a second inclined surface. In the rod feeding state, the two first inclined surfaces are in contact with the transition inclined surface. In the rod pulling state, the two second inclined surfaces are in contact with the transition inclined surface. The main body comprises a bottom plate, an upper cover plate and a lower plate body arranged oppositely. An installation cavity with open ends is formed between the upper cover plate and the lower plate body. The slip is arranged in the installation cavity. Two guide grooves are symmetrically arranged on both sides of the lower plate body.

2. The clamping device of claim 1, wherein The first clamping surface comprises a first arc surface, and the second clamping surface further comprises a second arc surface. In the rod feeding state, the two first arc surfaces are in contact with the rod body. In the rod pulling state, the two second arc surfaces are in contact with the rod body.

3. The clamping device of claim 1, wherein Two guide assemblies are oppositely arranged at both ends of the slip assembly. Each guide assembly comprises two oppositely arranged guide wheels, each of which is rotatably arranged on the main body. The gap between the two guide wheels is used for the rod member to pass through.

4. The clamping device of claim 1, wherein A support assembly is further included. The support assembly comprises two support seats arranged at both ends of the slip assembly. The support seats are used for supporting the rod member.

5. The clamping device of claim 1, wherein The connecting shaft and the slip shaft are further included, the upper cover plate and the lower plate body are connected through the connecting shaft, the number of the slip shaft is two, two slip shafts correspond to two slips respectively, each slip is sleeved on the corresponding slip shaft, and the two ends of the slip shaft are rotatably arranged on the upper cover plate and the lower plate body respectively.

6. The clamping device of claim 1, wherein The lower plate body includes a lower cover plate and a bottom plate, the lower cover plate is arranged opposite to the upper cover plate, and the mounting cavity is formed between the lower cover plate and the upper cover plate, the bottom plate is arranged below the lower cover plate, and the bottom end of the lower cover plate is symmetrically provided with inverted L-shaped recesses on both sides, and the guide grooves are formed between each recess and the upper end surface of the bottom plate.

7. The clamping device of claim 1, wherein Two handles are further included, and each slip is provided with the handle.

8. The clamping device of claim 1, wherein The reset device is a spring.

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