Pipe penetrating equipment for water pipe

Abstract

The utility model discloses pipe penetrating equipment for a water pipe, which comprises a rack, a first positioning structure, a second positioning structure, a third positioning structure and a driving mechanism, and the first positioning structure comprises a first mounting arm and a first positioning component; the second positioning structure comprises a second mounting arm and a second positioning assembly; the third positioning structure comprises a third mounting arm and a third positioning assembly; the driving mechanism is used for driving the first positioning assembly and the second positioning assembly to reciprocate, the third positioning assembly is sleeved with the sleeve, and the sleeve can reciprocate along with the first positioning assembly and the second positioning assembly. The relative distance between the first positioning assembly and the second positioning assembly at the completion position is smaller than or equal to the relative distance between the first positioning assembly and the second positioning assembly at the initial position. According to the pipe penetrating equipment, manual pipe penetrating can be replaced by machine pipe penetrating, and the labor intensity of workers and the labor cost of water pipe manufacturers are greatly reduced.

Description

Technical Field

[0001] The utility model relates to the field of pipe threading machines, in particular to a pipe threading device for water pipes. Background Art

[0002] Water pipes are often used in garden watering and car washing. Such water pipes usually include an inner pipe and a sleeve arranged outside the inner pipe. The inner pipe is generally made of plastic, rubber, silicone and other materials and is used to divert water. The sleeve is generally made of cloth and is mainly used to improve the wear resistance and aesthetics of the water pipe.

[0003] At present, in the process of producing such water pipes, water pipe manufacturers generally adopt manual pipe threading to thread the inner pipe into the casing. The pipe threading tools used for manual pipe threading are such as a telescopic water pipe processing device (China Invention Announcement No.: CN104669204B), which includes a roller fixed on the fixing device, a hook-shaped connecting rod hooked on the roller, a diamond-shaped locking head connected to the head of the hook-shaped connecting rod, and an inner sleeve sleeved on the diamond-shaped locking head. When in use, the end of the inner pipe is clamped and positioned between the diamond-shaped locking head and the inner sleeve, the head end of the casing is sleeved outside the hook-shaped connecting rod, and the inner pipe is threaded into the casing by the worker holding the head ends of the inner pipe and the casing and walking in a preset pipe threading direction. However, since the length of such water pipes is often more than 10m, and most of them exceed 30m or 50m, workers are required to hold the first end of the inner pipe and the first end of the casing and walk a pipe-threading distance of about 10m, 30m, or 50m when threading the pipe manually. After completing the threading operation of a group of inner pipes and casings, workers are required to hold the first end of the inner pipe and the first end of the casing and walk a pipe-threading distance of about 10m, 30m, or 50m to return to the initial position in order to store the semi-finished water pipes that have been threaded and to carry out the next threading operation. The labor intensity of the workers is high, and the labor cost of the water pipe manufacturers is high. Summary of the invention

[0004] The utility model aims at the deficiencies in the prior art and provides a pipe threading device for water pipes, which can replace manual pipe threading with machine pipe threading, thus greatly reducing the labor intensity of workers and the labor cost of water pipe manufacturers.

[0005] The utility model provides a pipe threading device, comprising a frame, a first positioning structure, a second positioning structure, a third positioning structure and a driving mechanism, wherein the frame comprises a machine body and a machine head arranged at one end of the machine body; the first positioning structure comprises a first mounting arm arranged on the machine body along the width direction of the machine body, and a first positioning component arranged on the first mounting arm and used for positioning the head end of the connecting sleeve; the second positioning structure comprises a second mounting arm arranged on the machine body along the width direction of the machine body, and a second positioning component arranged on the second mounting arm and used for positioning the head end of the connecting inner pipe; the third positioning structure comprises a third mounting arm arranged on the machine head along the width direction of the machine body, and a second positioning component arranged on the third mounting arm and used for positioning the head end of the connecting inner pipe The third positioning assembly at the end; a driving mechanism is connected to the first mounting arm and the second mounting arm respectively, and is used to drive the first positioning assembly and the second positioning assembly to reciprocate along the length direction of the machine body between an initial position close to the machine head and a completion position away from the machine head. The sleeve is sleeved outside the third positioning assembly, and can move toward the completion position with the first positioning assembly and the second positioning assembly so that the inner tube is inserted into the sleeve, and can move toward the initial position with the first positioning assembly and the second positioning assembly so that the sleeve head end and the inner tube head end return to the initial position. At the completion position, the relative distance between the first positioning assembly and the second positioning assembly is less than or equal to the relative distance between the first positioning assembly and the second positioning assembly at the initial position.

[0006] Preferably, when in the completion position, the first positioning component and the second positioning component are close to each other, and a first position sensor for detecting the proximity of the first positioning component relative to the second positioning component is arranged between the first mounting arm and the second mounting arm; the reciprocating motion has a first stroke from the initial position to the completion position, and a second stroke from the completion position to the initial position, in which, in the first stroke, the distance between the first positioning component and the second positioning component at the completion position is smaller than the relative distance between the first positioning component and the second positioning component at the initial position; in the second stroke, the distance between the first positioning component and the second positioning component at the completion position is equal to the relative distance between the first positioning component and the second positioning component at the initial position.

[0007] Preferably, the machine body is provided with a second position sensor for detecting that the first mounting arm is located at one end of the machine body near the nose, a third position sensor for detecting that the second mounting arm is located at one end of the machine body near the nose, and a fourth position sensor for detecting that the second mounting arm is located at one end of the machine body away from the nose, and the third position sensor is located on the side of the second sensor away from the nose.

[0008] Preferably, the driving mechanism includes a first driving structure for driving the first positioning component to reciprocate between an initial position and a finishing position, and a second driving structure for driving the second positioning component to reciprocate between an initial position and a finishing position. In the first stroke, the relative distance between the first positioning component and the second positioning component at the initial position can be adjusted by the first driving structure and the second driving structure.

[0009] Preferably, the first driving structure includes a first conveying member arranged on the machine body along the length direction of the machine body, and a first driving member used to drive the first conveying member to reciprocate between an initial position and a completion position along the length direction of the machine body, the first mounting arm is positioned and connected to the first conveying member, the sleeve can move toward the completion position with the first conveying member so that the inner tube is inserted into the sleeve, and can move toward the initial position with the first conveying member so that the head end of the sleeve returns to the initial position; the second driving structure includes a second conveying member arranged on the machine body along the length direction of the machine body, and a second driving member used to drive the second conveying member to reciprocate along the length direction of the machine body, the second conveying member is arranged parallel to the first conveying member and spaced apart, the second mounting arm is positioned and connected to the second conveying member, the head end of the inner tube can move toward the completion position or the initial position with the second conveying member to move in coordination with the head end of the sleeve; the driving mechanism also includes a control panel arranged on the machine head, the first driving member and the second driving member are electrically connected to the control panel respectively, and the relative distance between the first positioning component and the second positioning component is adjusted by controlling the first driving member and the second driving member through the control panel.

[0010] Preferably, slide rails arranged along the length direction of the body are respectively provided on both sides of the body, and two first sliding blocks slidably connected to the slide rails on both sides are respectively provided on the first mounting arm, and a first positioning block positioned and connected to the first conveying member is also provided on the first mounting arm, the first positioning block is arranged between the two first sliding blocks, and the first conveying member is arranged as a synchronous belt, and the first driving structure also includes a first driving wheel group respectively sleeved on the inner sides of the two ends of the first conveying member, and the first driving member is transmission connected to one of the first driving wheel groups; two second sliding blocks slidably connected to the slide rails on both sides are respectively provided on the second mounting arm, and a second positioning block positioned and connected to the second conveying member is also provided on the second mounting arm, the second positioning block is arranged between the two second sliding blocks, and the second conveying member is arranged as a synchronous belt, and the second driving structure also includes a second driving wheel group respectively sleeved on the inner sides of the two ends of the second conveying member, and the second driving member is transmission connected to one of the second driving wheel groups.

[0011] Preferably, the first positioning assembly includes a first positioning member arranged on the first mounting arm, a first main clamp and a first auxiliary clamp arranged relatively to the first positioning member, a sleeve member arranged between the first main clamp and the first auxiliary clamp, and a first switch member arranged on the first mounting arm and / or the first positioning member, the first switch member being used to control the first main clamp and the first auxiliary clamp to move relatively away from each other to an open state, and relatively close to each other to a use state, and when in the use state, the first end of the sleeve can be clamped and positioned between the sleeve member, the first main clamp and the first auxiliary clamp; the second positioning assembly includes a second positioning member arranged on the second mounting arm, a second main clamp and a second auxiliary clamp arranged relatively to the second positioning member, and a second switch member arranged on the second mounting arm and / or the second positioning member, the second switch member being used to control the second main clamp and the second auxiliary clamp to move relatively away from each other to an open state, and relatively close to each other to a use state, and when in the use state, the first end of the inner tube can be clamped and positioned between the second main clamp and the second auxiliary clamp.

[0012] Preferably, the first main clamp and the first auxiliary clamp are arranged on a side close to the machine head below the first mounting arm through a first positioning member, and a accommodating area is formed between the lower side of the first mounting arm and the first main clamp and the first auxiliary clamp, and the second positioning member includes a second positioning portion arranged below the second mounting arm and extending toward the first positioning member, and the second main clamp and the second auxiliary clamp are arranged on one end of the second positioning portion close to the first positioning member, and when in the completed position, the second positioning portion can extend into the accommodating area to allow the second main clamp and the second auxiliary clamp to approach the first main clamp and the first auxiliary clamp.

[0013] Preferably, the third mounting arm includes a positioning shaft and a positioning wheel connected to the positioning shaft, the outer periphery of the positioning wheel is recessed with a traction groove along its circumferential direction, the third positioning assembly includes a traction member, and a clamp connected to the head end of the traction member, the traction member is configured to be in a hook shape and hung on the traction groove, the end of the inner tube can be positioned and connected to the clamp, the head end of the sleeve can be sleeved toward the head end of the traction member through the end of the traction member, and clamped and positioned between the first main clamp and the first auxiliary clamp, and when the sleeve moves toward the completion position with the first positioning structure, the positioning wheel can rotate around the axis of the positioning shaft to guide the sleeve to move along the traction groove.

[0014] Preferably, the first mounting arm is provided with a plurality of first positioning components, and the first mounting arm is also provided with a first power source structure, each of the first positioning components is connected to the first power source structure through a first power tube, and the power medium in the first power source structure can enter the first positioning component along the first medium channel in the first power tube to drive the first main clamp and the first auxiliary clamp to be relatively close to each other until they are in use, and the first switch is connected to the first power tube to open or close the first medium channel in the first power tube; the second mounting arm is provided with a plurality of second positioning components arranged one-to-one corresponding to the first positioning components, and the second mounting arm is provided with a second power source structure, each of the second positioning components is connected to the second power source structure through a second power tube, and the power medium in the second power source structure can enter the second positioning component along the second medium channel in the second power tube to drive the second main clamp and the second auxiliary clamp to be relatively close to each other until they are in use, and the second switch is connected to the second power tube to open or close the second medium channel in the second power tube; the positioning shaft is provided with a plurality of positioning wheels arranged one-to-one corresponding to the first positioning components, and a third positioning component hung on the positioning wheels.

[0015] The pipe threading device provided by the utility model can position and connect the head end of the inner pipe to the second positioning component, position and connect the rear end of the inner pipe to the third positioning component, sleeve the sleeve outside the third positioning component, and position and connect the head end of the sleeve to the first positioning component, and drive the first positioning structure and the second positioning structure to move toward the completed position along the length direction of the machine body through the driving mechanism, so that the inner pipe positioned and connected to the second positioning component is penetrated into the sleeve positioned and connected to the first positioning component, and the first positioning structure and the second positioning structure are driven by the driving mechanism to move toward the initial position along the length direction of the machine body, so as to store the semi-finished water pipe with the threaded pipe and carry out the next pipe threading operation. Compared with the method in the prior art in which the worker holds the head end of the inner pipe and the head end of the sleeve and walks back and forth a pipe threading distance, in the utility model, the first positioning structure and the second positioning structure are driven by the driving mechanism between the initial position and the completed position By moving back and forth, the sleeve head end and the inner tube head end can be driven to move back and forth between the initial position and the finished position, so that machine threading can replace manual threading, which greatly reduces the labor intensity of workers and the labor cost of water pipe manufacturers; in addition, because the relative distance between the first positioning component and the second positioning component at the finished position is less than or equal to the relative distance between the first positioning component and the second positioning component at the initial position, that is, the relative distance between the sleeve head end and the inner tube head end when the threading is completed is less than or equal to the relative distance between the sleeve head end and the inner tube head end when preparing for threading or returning to the initial position, the sleeve head end can be closer to the inner tube head end or maintain the initial distance when the threading is completed, and the integrity of the threading is high compared to setting the relative distance between the first positioning component and the second positioning component at the finished position to be greater than the relative distance between the first positioning component and the second positioning component at the initial position.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0018] Figure 1 It is a structural schematic diagram of a pipe threading device according to one embodiment of the utility model.

[0019] Figure 2 A schematic diagram of the structure of a pipe threading device according to an embodiment of the present invention Figure 1 .

[0020] Figure 3 A schematic diagram of the structure of a pipe threading device according to an embodiment of the present invention Figure 2 .

[0021] Figure 4 A schematic diagram of the structure of a pipe threading device according to an embodiment of the present invention Figure 3 .

[0022] Figure 5 It is a structural schematic diagram of a first positioning structure of an embodiment of the utility model.

[0023] Figure 6 It is a structural schematic diagram of a second positioning structure of an embodiment of the utility model.

[0024] Figure 7 It is a structural schematic diagram of a third positioning structure and a machine head according to an embodiment of the utility model. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0027] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0029] Unless otherwise defined, the technical or scientific terms used herein shall have the common meanings understood by persons with ordinary skills in the field to which the utility model belongs. The words "first", "second" and similar words used in the patent application specification and claims of the utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "a" do not indicate a quantity limitation, but indicate the existence of at least one.

[0030] like Figure 1-7As shown, as an embodiment of the utility model, a pipe threading device for water pipes is disclosed, including a first positioning structure 1, a second positioning structure 2, a third positioning structure 3, a frame 4 and a driving mechanism 5. The frame 4 includes a body 41 and a head 42 arranged at one end of the body 41. The first positioning structure 1 includes a first mounting arm 12 arranged on the body 41 along the width direction of the body 41, and a first positioning assembly 11 arranged on the first mounting arm 12 for positioning the head end of the connecting sleeve. The second positioning structure 2 includes a second mounting arm 22 arranged on the body 41 along the width direction of the body 41, and a second positioning assembly 21 arranged on the second mounting arm 22 for positioning the head end of the connecting inner pipe. The third positioning structure 3 includes a third mounting arm 32 arranged on the head 42 along the width direction of the body 41, and a third positioning assembly 31 arranged on the third mounting arm 32 for positioning the end of the connecting inner pipe. The driving mechanism 5 is connected to the first mounting arm 12 and the second mounting arm 22 respectively, and is used to drive the first positioning component 11 and the second positioning component 21 to reciprocate along the length direction of the body 41 between an initial position A close to the machine head 42 and a completion position B away from the machine head 42. The sleeve is sleeved outside the third positioning component 31, and can move toward the completion position B with the first positioning component 11 and the second positioning component 21 so that the inner tube is inserted into the sleeve, and can move toward the initial position A with the first positioning component 11 and the second positioning component 21 so that the head end of the sleeve and the head end of the inner tube return to the initial position A. At the completion position B, the relative distance between the first positioning component 11 and the second positioning component 12 is less than or equal to the relative distance between the first positioning component 11 and the second positioning component 21 at the initial position A.The pipe threading equipment of this embodiment can position and connect the head end of the inner pipe to the second positioning component 21, position and connect the tail end of the inner pipe to the third positioning component 31, sleeve the sleeve outside the third positioning component 31, and position and connect the head end of the sleeve to the first positioning component 11, and drive the first positioning structure 1 and the second positioning structure 2 to move toward the completed position B along the length direction of the machine body 41 through the driving mechanism 5, so that the inner pipe positioned and connected to the second positioning component 21 is inserted into the sleeve positioned and connected to the first positioning component 11, and drive the first positioning structure 1 and the second positioning structure 2 to move toward the initial position A along the length direction of the machine body 41 through the driving mechanism 5, so as to store the semi-finished water pipe with the threaded pipe and carry out the next pipe threading operation. Compared with the method in the prior art in which the worker holds the head end of the inner pipe and the head end of the sleeve and walks back and forth a pipe threading distance, in this embodiment, the driving mechanism 5 drives the first positioning structure 1 and the second positioning structure 2 between the initial position A and the completed position B The back-and-forth movement can drive the first end of the sleeve and the first end of the inner tube to move back and forth between the initial position A and the completed position B, so that machine pipe threading can replace manual pipe threading, which greatly reduces the labor intensity of workers and the labor cost of water pipe manufacturers; in addition, since the relative distance between the first positioning component 11 and the second positioning component 21 at the completed position B is less than or equal to the relative distance between the first positioning component 11 and the second positioning component 21 at the initial position A, that is, the relative distance between the first end of the sleeve and the first end of the inner tube when the pipe threading is completed is less than or equal to the relative distance between the first end of the sleeve and the first end of the inner tube when preparing for pipe threading or returning to the initial position, so that the first end of the sleeve can be closer to the first end of the inner tube or maintain the initial distance when the pipe threading is completed, compared with setting the relative distance between the first positioning component 11 and the second positioning component 21 at the completed position B to be greater than the relative distance between the first positioning component 11 and the second positioning component 21 at the initial position A, the integrity of the pipe threading is high.

[0031] In some specific embodiments, the first positioning assembly 11 and the second positioning assembly 21 are close to each other at the completion position B, so that the first end of the casing is close to the first end of the inner tube when the pipe is inserted, so as to improve the integrity of the pipe insertion. Figure 2 As shown, a first position sensor 61 for detecting the approach of the first positioning component 11 relative to the second positioning component 21 is provided between the first mounting arm 12 and the second mounting arm 22, so as to timely obtain the position information of the first positioning component 11 and the second positioning component 21 approaching each other.

[0032] In some specific embodiments, the reciprocating motion has a first stroke from an initial position A to a completed position B, and a second stroke from the completed position B to the initial position A. In the first stroke, at the completed position B, the distance between the first positioning component 11 and the second positioning component 21 is smaller than the distance between the first positioning component 11 and the second positioning component 21 at the initial position A. That is to say, the relative distance between the first end of the sleeve and the first end of the inner tube when the pipe threading is completed is smaller than the relative distance between the first end of the sleeve and the first end of the inner tube when the pipe threading is ready. This allows the first end of the sleeve to be as close as possible to the first end of the inner tube when the pipe threading is completed to improve the integrity of the pipe threading, and also allows sufficient distance to be reserved for the inner tube to bend and deform for smooth pipe threading when the pipe threading is ready. In the second stroke, the distance between the first positioning component 11 and the second positioning component 21 at the completion position B is equal to the relative distance between the first positioning component 11 and the second positioning component 21 at the initial position A, that is, the relative distance between the first end of the sleeve and the first end of the inner tube when the pipe threading is completed is equal to the relative distance between the first end of the sleeve and the first end of the inner tube when returning to the initial position A, so that the relative distance between the first end of the sleeve and the first end of the inner tube after returning to the initial position A can be as close as possible, so as to facilitate workers to collect the semi-finished water pipes with the threaded pipes.

[0033] like Figure 2As shown, in some specific embodiments, the body 41 is provided with a second position sensor 62 for detecting that the first mounting arm 12 is located at one end of the body 41 close to the machine head 42, a third position sensor 63 for detecting that the second mounting arm 22 is located at one end of the body 41 close to the machine head 42, and a fourth position sensor 64 for detecting that the second mounting arm 22 is located at one end of the body 41 away from the machine head 42. The third position sensor 63 is located on the side of the second sensor 62 away from the machine head 42. During specific operation, in the first stroke, at the initial position A, the first positioning structure 1 and the second positioning structure 2 can be driven by the driving mechanism 5 to move from the initial position A to the completion position B at the same time. When the fourth position pipe threader 64 obtains that the second mounting arm 22 is located at the completion position B on the machine body 41 away from the end of the machine head 42, the second mounting arm 22 is driven to stop moving by the driving mechanism 5, while the first mounting arm 12 continues to move. When the first position sensor 61 obtains that the first positioning component 11 moves to a preset close position relative to the second positioning component 21, the first mounting arm 12 is driven to stop moving by the driving mechanism 5, so that the first end of the sleeve and the first end of the inner tube are as close as possible to improve the pipe threading. completeness; in the second stroke, when the position B is completed, the first mounting arm 12 and the second mounting arm 22 can be driven simultaneously by the driving mechanism 5 to move toward the initial position A, and when the second position sensor 62 obtains that the first mounting arm 12 moves to the initial position A on the relative body 41 close to the end of the machine head 42, the first mounting arm 12 and the second mounting arm 22 are driven simultaneously by the driving mechanism 5 to stop moving, and / or when the third position sensor 63 obtains that the second mounting arm 22 moves to the initial position A on the relative body 41 close to the end of the machine head 42, the first mounting arm 12 and the second mounting arm 22 are driven simultaneously by the driving mechanism 5 to stop moving, so as to facilitate the workers to store the semi-finished water pipes that have been threaded.

[0034] like Figure 2As shown, in some specific embodiments, the driving mechanism 5 includes a first driving structure 51 for driving the first positioning component 11 to reciprocate between the initial position A and the completion position B, and a second driving structure 52 for driving the second positioning component 21 to reciprocate between the initial position A and the completion position B. In the first stroke, the relative distance between the first positioning component 11 and the second positioning component 21 at the initial position A can be adjusted by the first driving structure 51 and the second driving structure 52. For example, the second driving structure 52 drives the second mounting arm 22 toward the direction of the machine body 41 away from the machine head 42 The second mounting arm 22 is moved away from the machine body 41 to increase the distance between the first end of the inner tube connected to the second positioning assembly 21 and the first end of the sleeve connected to the first positioning assembly 11, and the second driving structure 52 drives the second mounting arm 22 to move away from the machine body 41 in the direction close to the machine head 42 to reduce the distance between the first end of the inner tube connected to the second positioning assembly 21 and the first end of the sleeve connected to the first positioning assembly 11, so as to adapt to the spacing distance required for the bending deformation of inner tubes of different softness between the first positioning assembly 11 and the second positioning assembly 21, and adapt to the pipe threading operation of inner tubes of different softness, and has a wide range of applications. In this embodiment, the first mounting arm 12 or the second mounting arm 22 is driven to move by a separate driving structure, which has a simple structure and is convenient for installation and debugging. In other embodiments, the first mounting arm 12 and the second mounting arm 22 can also be driven to move by the same driving structure, or by three or more driving structures.

[0035] like Figure 3As shown, in some specific embodiments, the first driving structure 51 includes a first conveying member 511 arranged on the body 41 along the length direction of the body 41, and a first driving member 512 for driving the first conveying member 511 to reciprocate between an initial position A and a finished position B along the length direction of the body 41. The first mounting arm 12 is positioned and connected to the first conveying member 511. The sleeve can move toward the finished position B with the first conveying member 511 to allow the inner pipe to be inserted into the sleeve to complete the pipe insertion operation, and can move toward the initial position A with the first conveying member 511 to return the head end of the sleeve to the initial position A to accommodate the semi-finished water pipe that has been inserted and to perform the next pipe insertion operation. The second driving structure 52 includes a second conveying member 521 arranged on the body 41 along the length direction of the body 41, and a second driving member 522 for driving the second conveying member 521 to reciprocate along the length direction of the body 41. The second conveying member 521 is arranged in parallel and spaced apart from the first conveying member 511. The second mounting arm 22 is positioned and connected to the second conveying member 521. The head end of the inner tube can move toward the completion position B or the initial position A with the second conveying member 521 to move in coordination with the head end of the sleeve, assist the inner tube to be inserted into the sleeve, prevent excessive insertion from causing the head end of the inner tube to shrink into the sleeve, and return to the initial position A together with the sleeve. The driving mechanism 5 also includes a control panel 421 arranged at the head of the machine 42. The first driving member 512, the second driving member 522, the first position sensor 61, the second position sensor 62, the third position sensor 63, and the fourth position sensor 64 are electrically connected to the control panel 421 respectively. The relative distance between the first positioning component 11 and the second positioning component 21 is adjusted by controlling the first driving member 512 and the second driving member 522 through the control panel 421, which is convenient for operation.

[0036] like Figure 3As shown, in some specific embodiments, slide rails 43 arranged along the length direction of the body 41 are respectively provided on both sides of the body 41, and two first sliders 123 slidingly connected to the slide rails 43 on both sides are respectively provided on the first mounting arm 12. When the first mounting arm 12 reciprocates along the length direction of the body 41, it is guided by the first slider 123 to move along the slide rail 43. The first mounting arm 12 is also provided with a first positioning block 122 which is positioned and connected with the first conveying member 511. The first positioning block 122 is arranged between the two first sliding blocks 123. The first conveying member 511 is configured as a synchronous belt. The first driving structure 51 also includes a first driving wheel group 513 which is respectively sleeved on the inner sides of both ends of the first conveying member 511. The first driving member 512 is transmission-connected to a first driving wheel group 513 which is close to the machine head 42. The first driving member 512 is configured as a driving motor, which can drive the first conveying member 511, the first mounting arm 12 which is positioned and connected to the first conveying member 511 through the first positioning block 122, the first positioning assembly 11 arranged on the first mounting arm 12, and the head end of the sleeve which is positioned and connected to the first positioning assembly 11 to reciprocate along the length direction of the track 43 by driving the first driving wheel group 513 to rotate. The second mounting arm 22 is respectively provided with two second sliding blocks 223 slidably connected to the slide rails 43 on both sides, and the second mounting arm 22 is also provided with a second positioning block 222 positioned and connected to the second conveying member 521. The second positioning block 222 is arranged between the two second sliding blocks 223, and the second conveying member 521 is configured as a synchronous belt. The second driving structure 52 also includes a second driving wheel group 523 respectively sleeved on the inner sides of the two ends of the second conveying member 521, and the second driving member 522 is transmission-connected to a second driving wheel group 523 close to the machine head 42. The second driving member 522 is configured as a driving motor, which can drive the second conveying member 521, the second mounting arm 22 positioned and connected to the second conveying member 521 through the second positioning block 222, the second positioning assembly 21 arranged on the second mounting arm 22, and the head end of the inner tube positioned and connected to the second positioning assembly 21 to reciprocate along the length direction of the track 43 by driving the second driving wheel group 523 to rotate. In other embodiments, the first conveying member 511 or the second conveying member 521 may also be configured as a synchronous chain or other structure that can be used to drive the first mounting arm 12 and the second mounting arm 22 to reciprocate. The first driving member 512 may also be connected to a first driving wheel group 513 away from the machine head 42, or the second driving member 522 may be connected to a second driving wheel group 523 away from the machine head 42, both of which can drive the first mounting arm 12 or the second mounting arm 22 to reciprocate along the length direction of the track 43.

[0037] like Figure 4As shown, in some specific embodiments, the cross-section of the slide rail 43 includes a rail base 431, a rail neck 432 connected to the upper side of the rail base 431, and a rail head 433 connected to the upper side of the rail neck 432, and the width of the rail head 433 is greater than the width of the rail neck 432. The first slider 123 includes a first neck slot 1231 matched with the narrow neck 432 of the track, and a first head slot 1232 matched with the track head 433, the width of the first head slot 1232 is greater than the width of the first neck slot 1231, the second slider 223 includes a second neck slot 2231 matched with the narrow neck 432 of the track, and a second head slot 2232 matched with the track head 433, the width of the second head slot 2232 is greater than the width of the second neck slot 2231, so that when the first mounting arm 12 and the second mounting arm 22 reciprocate along the length direction of the body 41, the first slider 123 and the second slider 223 can be guided to move along the slide rail 43, and the first neck slot 1231 and the second mounting arm 22 can be stably connected to the body 41 and prevented from falling off through the cooperation between the first neck slot 1231 and the narrow neck 432 of the track, and the cooperation between the first head slot 1232 and the track head 433. The cross section of the rail head 433 is set to a circular structure, the first head chute 1232 and the second head chute 2232 are set to a circular groove structure, and the first slider 123 and the second slider 223 are set to the same structure, which is convenient for processing and assembly. The first positioning block 122 includes a first upper positioning plate 1221 connected to the first positioning structure 1, and a first lower positioning plate 1222 detachably connected to the lower side of the first upper positioning plate 1221, the second positioning block 222 includes a second upper positioning plate 2221 connected to the second positioning structure 2, and a second lower positioning plate 2222 detachably connected to the lower side of the second upper positioning plate 2221, the upper side strip of the first conveying member 511 is clamped and positioned between the first upper positioning plate 1221 and the first lower positioning plate 1222, and the upper side strip of the second conveying member 521 is clamped and positioned between the second upper positioning plate 2221 and the second lower positioning plate 2222, which is convenient for assembly.

[0038] like Figure 5 , 6As shown, in some specific embodiments, the first positioning component 11 includes a first positioning member 114 arranged on the first mounting arm 12, a first main clamp 111 and a first auxiliary clamp 112 relatively arranged on the first positioning member 114, a sleeve 113 arranged between the first main clamp 111 and the first auxiliary clamp 112, and a first switch 115 arranged on the first mounting arm 12. The first switch 115 is used to control the first main clamp 111 and the first auxiliary clamp 112 to move relatively away from each other to an open state, and relatively close to each other to a use state. In the use state, the head end of the sleeve can be clamped and positioned between the sleeve 113, the first main clamp 111 and the first auxiliary clamp 112, so as to facilitate the quick installation of the head end of the sleeve on the first positioning component 11, or the quick removal from the first positioning component 11. The second positioning assembly 21 includes a second positioning member 213 arranged on the second mounting arm 22, a second main clamp 211 and a second auxiliary clamp 212 arranged relatively on the second positioning member 213, and a second switch member 214 arranged on the second mounting arm 22. The second switch member 214 is used to control the second main clamp 211 and the second auxiliary clamp 212 to move relatively away from each other to an open state, and relatively close to each other to a use state. In the use state, the head end of the inner tube can be clamped and positioned between the second main clamp 211 and the second auxiliary clamp 212, so as to facilitate the quick installation of the head end of the inner tube on the second positioning assembly 21, or the quick removal from the second positioning assembly 21.

[0039] In some specific embodiments, the first main clamp 111 and the first auxiliary clamp 112 are arranged on a side of the machine head 42 below the first mounting arm 12 through the first positioning member 114, and a receiving area is formed between the lower side of the first mounting arm 12 and the first main clamp 111 and the first auxiliary clamp 112. The second positioning member 213 includes a second positioning portion arranged below the second mounting arm 22 and extending toward the first positioning member 114. The second main clamp 211 and the second auxiliary clamp 212 are arranged on one end of the second positioning portion close to the first positioning member 114. When the second positioning portion B is completed, the second positioning portion can extend into the receiving area to make the second main clamp 211 and the second auxiliary clamp 212 close to the first main clamp 111 and the first auxiliary clamp 112, so that the head end of the inner tube and the head end of the casing can be closer after the pipe threading is completed, and the pipe threading operation is more complete.

[0040] like Figure 2As shown, in some specific embodiments, the third mounting arm 32 includes a positioning shaft 321 and a positioning wheel 322 connected to the positioning shaft 321, the outer periphery of the positioning wheel 322 is concavely provided with a traction groove 3221 along its circumferential direction, the third positioning assembly 31 includes a traction member 311, and a clamp 312 connected to the head end of the traction member 311, the traction member 311 is configured in a hook shape and is hung on the traction groove 3221, the end of the inner tube can be positioned and connected to the clamp 312, and the head end of the sleeve can be pulled through the traction member The end of the guide member 311 is sleeved toward the head end of the traction member 311 and clamped and positioned between the first main clamp 111 and the first auxiliary clamp 112. When the sleeve moves toward the completion position B with the first positioning structure 1, the positioning wheel 322 can rotate around the axis of the positioning shaft 321 to guide the sleeve to move along the traction groove 3221, so as to keep the traction member 311 hung on the traction groove 3221 while allowing the sleeve sleeved outside the traction member 311 to move relative to the traction groove 3221 to be sleeved outside the inner tube.

[0041] In some specific embodiments, a plurality of first positioning components 11 are provided on the first mounting arm 12, and a first power source structure (not shown in the figure) is also provided on the first mounting arm 12. Each first positioning component 11 is connected to the first power source structure through a first power tube (not shown in the figure), and the power medium such as gas and liquid in the first power source structure can enter the first positioning component 11 along the first medium channel in the first power tube to drive the first main clamp 111 and the first auxiliary clamp 112 to be relatively close to a use state. The first switch 115 is connected to the first power tube for opening or closing the first medium channel in the first power tube, so that the first main clamp 111 and the first auxiliary clamp 112 can be driven relatively close to or away from each other through a control system such as a pneumatic control system or a hydraulic control system, so that the first positioning component 11 can be easily switched between the use state and the open state, and it is convenient for workers to replace the sleeve. The second mounting arm 22 is provided with a plurality of second positioning components 21 arranged one-to-one corresponding to the first positioning component 11, and the second mounting arm 22 is provided with a second power source structure (not shown in the figure), and each second positioning component 21 is connected to the second power source structure (not shown in the figure) through a second power tube (not shown in the figure), and the gas, liquid and other power media in the second power source structure can enter the second positioning component 21 along the second medium channel in the second power tube to drive the second main clamp 211 and the second auxiliary clamp 212 to be relatively close to the use state, and the second switch 214 is connected to the second power tube, which is used to open or close the second medium channel in the second power tube, so that the second main clamp 211 and the second auxiliary clamp 212 can be driven to be relatively close or away from each other through a control system such as a pneumatic control system or a hydraulic control system, so that the second positioning component 21 can be easily switched between the use state and the open state, and it is convenient for workers to replace the inner tube. The positioning shaft 321 is provided with a plurality of positioning wheels 322 arranged one-to-one corresponding to the first positioning component 11, and a third positioning component 31 hung on the positioning wheel 322. In this embodiment, the first positioning assembly 11, the second positioning assembly 21 and the third positioning assembly 31 are set to eight respectively, which can complete the pipe threading operation of eight groups of inner pipes and casings at one time, further improving the pipe threading efficiency and reducing the time cost invested by the water pipe manufacturer. The moving speed of the first positioning structure 1 and the second positioning structure 2 can be set faster than the walking speed of workers in the prior art, so that the machine pipe threading speed is faster than the manual pipe threading speed, which can also further improve the pipe threading efficiency and reduce the time cost invested by the water pipe manufacturer. The spacing distance between two adjacent first positioning assemblies 11, the spacing distance between two adjacent second positioning assemblies 21, and the spacing distance between two adjacent third positioning assemblies 31 are set to 10cm-30cm, preferably 15cm-20cm, which can ensure the complementary interference of the pipe threading operation of the inner pipe and casing in the adjacent stations while making the adjacent stations compactly arranged, greatly reducing the floor space occupied by the entire pipe threading site and reducing the pipe threading site cost of the water pipe manufacturer.In other embodiments, the first positioning component 11, the second positioning component 21 and the third positioning component 31 can also be set to one or other numbers respectively, so that the pipe threading equipment can complete the pipe threading operation of one group or other number of groups of inner pipes and casings at one time.

[0042] like Figure 5 As shown, in some specific embodiments, a pipe threading channel 1131 is formed inside the sleeve 113 for the inner tube to pass through, and the head end of the sleeve can be sleeved outside the sleeve 113, so that the head end of the sleeve is supported outside the sleeve 113, and the inner tube moves relative to the sleeve by moving along the pipe threading channel 1131, which is conducive to the movement of the inner tube relative to the sleeve for pipe threading. A positioning groove 1111 is recessed on one side of the first main clamp 111 close to the first auxiliary clamp 112, and a positioning groove 2 1121 is recessed on one side of the first auxiliary clamp 112 close to the first main clamp 111 and arranged opposite to the positioning groove 1111. When the first main clamp 111 and the first auxiliary clamp 112 are in use, a clamping channel for clamping and positioning the head end of the sleeve can be formed between the sleeve 113, the positioning groove 1111 and the positioning groove 2 1121.

[0043] In some specific embodiments, the socket is made of hard materials such as metal and rubber and has a certain supporting strength so as to stably support the head end of the sleeve outside the socket 113, which is beneficial for the inner tube to move freely and smoothly along the tube passage 1131 and is beneficial for the head end of the sleeve to be more stably clamped and positioned in the clamping channel. The shape of the tube threading channel 1131 is matched with the shape of the inner tube. In the present embodiment, the tube threading channel 1131 is set as a circular structure, which is suitable for the tube threading operation with a circular inner tube. The socket 113 is set as a cylindrical structure. At this time, the positioning groove 1111 and the positioning groove 2 1121 can be respectively set as arc groove structures matching the cylindrical structure, so as to stably clamp and position the head end of the sleeve in the clamping channel; as another embodiment of the present invention, the tube threading channel can also be set as an elliptical structure, which is suitable for the tube threading operation with an oblate inner tube. At this time, the socket 113 can be set as an elliptical cylinder structure, and the positioning groove 1 1111 and the positioning groove 2 1121 can be respectively set as elliptical arc groove structures matching the elliptical cylinder structure, so as to stably clamp and position the head end of the sleeve in the clamping channel; in other embodiments, the tube threading channel can also be set as square, triangle or other shaped structures to be suitable for the tube threading operation with inner tubes of other shapes such as square and triangle.

[0044] like Figure 7As shown, in some specific embodiments, the clamp 312 includes a connector 3121, a mounting kit 3122 and a telescopic kit 3123, and the connector 3121 has a positioning end that can extend into the inner end of the inner tube, and a connecting end away from the positioning end. The mounting kit 3122 is connected to the head end of the traction member 311, and the connector 3121 is sleeved in the mounting kit 3122 and connected to the mounting kit 3122 through the connecting end. The telescopic kit 3123 is sleeved in the mounting kit 3122 and outside the connector 3121, and can telescopically move relative to the mounting kit 3122 and the connector 3121 between a use state close to the positioning end and an open state away from the positioning end. When it is in the use state, the inner tube end can be clamped and positioned between the positioning end and the telescopic kit 3123, so that the inner tube end can be quickly installed on the third positioning assembly 31 or quickly removed from the third positioning assembly 31, further improving the pipe threading efficiency. A reset member (not shown in the figure) is arranged between the telescopic kit 3123 and the installation kit 3122. The reset member may be an elastic member such as a spring or elastic silicone, which can provide an operating force to keep the telescopic kit 3123 in a use state, and facilitate the quick installation of the inner tube end between the positioning end and the telescopic kit 3123. The installation kit 3122 and the head end of the traction member 311 are detachably connected, and the installation kit 3122 and the connecting end are detachably connected. The detachable connection structure may be a threaded connection structure or a snap connection structure, etc., to facilitate the replacement of the clamp 312. In other embodiments, the head end or the connecting end of the traction member 311 and the installation kit 3122 may also be set as an integral structure or fixedly connected as a whole by welding or other methods to improve the stability of the connection between the clamp 312 and the traction member 311. In other embodiments, the connecting end may also be directly connected to the head end of the traction member 311, or simultaneously connected to the installation kit 3122 and the head end of the traction member 311. As another embodiment of the present invention, the clamp 312 may also only include the connecting head 3121 and the telescopic kit 3123 , and the end of the inner tube may be staggered and positioned between the connecting end and the telescopic kit 3123 .

[0045] In some specific embodiments, the cross section of the traction member 311 is set to a circular structure, which is suitable for the pipe-threading operation of a circular inner pipe. As another embodiment of the present invention, the cross section of the traction member 311 can also be set to an elliptical structure or a combined structure composed of at least two circular structures connected side by side, so as to be suitable for the pipe-threading operation of an oblate inner pipe. In other embodiments, the cross section of the traction member 311 can also be set to other shapes such as square and triangle to adapt to the pipe-threading operation of inner pipes of other shapes such as square and triangle.

[0046] In other specific embodiments, a spherical expansion portion with a width greater than that of the traction member 311 is further provided at the end of the traction member 311 to expand the interior of the sleeve when the sleeve is sleeved outside the traction member 311, thereby preventing the sleeve from moving smoothly relative to the traction member 311 due to the inner walls of the sleeve sticking together.

[0047] like Figure 7 As shown, in some specific embodiments, the third positioning structure 3 also includes a third driving assembly 33 for driving the positioning shaft 321 to rotate around the axis of the positioning shaft 321. The connecting portion 3211 is rotatably connected to the machine head 42, and the positioning wheel 322 is relatively fixedly connected to the positioning shaft 321, and can rotate relative to the machine head 42 around the axis of the positioning shaft 321 as the positioning shaft 321 rotates. The third driving assembly 33 includes a third conveying member 331, a third driving member 332, and a third driving wheel group 333. The third conveying member 331 is set as a synchronous belt, and the inner sides of the two ends of the third conveying member 331 are respectively sleeved with third driving wheel groups 333, one of which is relatively fixedly connected to the connecting portion 3211, and the third driving member 332 is set as a driving motor, and is in transmission connection with another third driving wheel group 333, and can drive the third driving wheel group 333 to rotate to drive the positioning shaft 321 to rotate, so as to cooperate with the sleeve to move toward the preset pipe-threading direction, which is more conducive to guiding the sleeve to move smoothly toward the preset pipe-threading direction. In other embodiments, the third drive assembly 33 may not be provided, and the positioning wheel 322 may be directly rotatably connected to the positioning shaft 321, so that the positioning wheel 322 can rotate relative to the axis of the positioning shaft 321 in coordination with the movement of the sleeve when the sleeve moves toward the end of the body 41 away from the head 42.

[0048] like Figure 2As shown, in some specific embodiments, the first mounting arm 12 includes a first mounting frame 121 arranged along the width direction of the body 41, and the first mounting frame 121 is configured as a horizontally arranged plate structure, including a first sliding portion 1211 and a first mounting portion 1212 respectively connected to both ends of the first sliding portion 1211, and the two first mounting portions 1212 are respectively protruded out of the side of the body 41, the first positioning block 122 and the first sliding block 123 are connected to the lower side of the first sliding portion 1211, the first position sensor 61 is connected to the upper side of the first sliding portion 1211, the first switch member 115 is connected to the upper side of the first mounting portion 1212, the first positioning member 114 is connected to the side of the first mounting portion 1212 close to the third positioning structure 3, the first main clamp 111 and the first auxiliary clamp 112 are installed on the first positioning member 114, and are arranged below the first mounting portion 1212 and on the side of the first positioning member 114 away from the body 41. The second mounting arm 22 includes a second mounting frame 221 arranged along the width direction of the machine body 41. The second mounting frame 221 is set as a horizontally arranged plate structure, including a second sliding portion 2211 and second mounting portions 2212 respectively connected to both ends of the second sliding portion 2211. The two second mounting portions 2212 are respectively protruded out of the side of the machine body 41. The second positioning block 222 and the second slider 223 are connected to the lower side of the second sliding portion 2211. The second switch member 214 is connected to the upper side of the second mounting portion 2212. The second positioning member 213 is connected to the lower side of the second mounting portion 2212 and extends in a direction close to the first positioning member 114. The second main clamp 211 and the second auxiliary clamp 212 are installed on the second positioning member 214 at one end close to the first positioning member 114. The positioning shaft 321 has a connecting portion 3211 connected to the machine head 42, and a third mounting portion 3212 protruding out of the side of the machine head 42. The third positioning assembly 31 is arranged on the third mounting portion 3212. In this embodiment, by setting the first positioning component 11 on the first mounting portion 1212 protruding outside the side of the body 41, setting the second positioning component 21 on the second mounting portion 2212 protruding outside the side of the body 41, and setting the third positioning component 31 on the third mounting portion 3212 protruding outside the side of the head 42, the work station is arranged outside the side of the body 41, and an open area required for the inner pipe and sleeve to be threaded and moved during the pipe threading is directly formed outside the side of the frame 4, thereby saving the pipe threading site occupation, and the open area is convenient for workers to replace the sleeve and the inner pipe. In other embodiments, the first mounting portion 1212 and the second mounting portion 2212 can also be set inside the frame 4, so that the work station is arranged inside the frame 4 and the pipe threading operation can also be carried out.

[0049] like Figure 2As shown, in some specific embodiments, the body 41 includes support frames 411 respectively arranged on both sides of the body 41 along its length direction, and a plurality of upper frames 412 connected between the two support frames 411 and a middle frame 413 arranged below the upper frames 412. The first conveying member 511 and the second conveying member 521 are arranged between the two support frames 411 and are sleeved outside the upper frames 412. The first conveying member 511 and the second conveying member 521 respectively include an upper side strip arranged above the upper frame 412 and a lower side strip arranged between the upper frame 412 and the middle frame 413. The upper frame 412 can be used to support the upper side strip, and the middle frame 413 can be used to support the lower side strip, so as to assist the first conveying member 511 or the second conveying member 521 of lengths of 10m, 30m, 50m, etc. to remain in a relatively horizontal arrangement state as a whole, thereby improving the stability of the arrangement of the first conveying member 511 or the second conveying member 521. The upper bracket 412 includes an upper bracket body and an upper roller arranged on the upper side of the upper bracket body along the width direction of the body 41, and the upper roller can be used to support the upper side strip. The middle bracket 413 includes a middle bracket body and a middle roller arranged on the upper side of the middle bracket body along the width direction of the body 41, and the middle roller can be used to support the lower side strip, so that when the first conveying member 511 and the second conveying member 521 move along the length direction of the body 41, they can be supported on the upper roller and the middle roller, and roll and rub with the upper roller and the middle roller to move relative to the upper bracket 412. Compared with the method of directly moving relative to the body 41 through sliding friction between the first conveying member 511 and the second conveying member 521 and the upper bracket body and the middle bracket body, the friction force is smaller, which is beneficial to the movement of the first conveying member 511 and the second conveying member 521 relative to the body 41 and prolonging the service life of the first conveying member 511 and the second conveying member 521.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the various embodiments of the utility model.

[0051] In short, the above is only a preferred embodiment of the present utility model, and all equivalent changes and modifications made according to the scope of the patent application of the present utility model should fall within the scope of the present utility model patent.

Claims

1. A pipe threading device for water pipes, characterized in that: include: A frame, comprising a body and a head arranged at one end of the body; The first positioning structure comprises a first mounting arm arranged on the machine body along the width direction of the machine body, and a first positioning assembly arranged on the first mounting arm and used for positioning the head end of the connecting sleeve; The second positioning structure comprises a second mounting arm arranged on the machine body along the width direction of the machine body, and a second positioning assembly arranged on the second mounting arm and used for positioning the head end of the connecting inner tube; A third positioning structure, comprising a third mounting arm arranged on the nose along the width direction of the machine body, and a third positioning assembly arranged on the third mounting arm and used for positioning the end of the connecting inner tube; A driving mechanism is connected to the first mounting arm and the second mounting arm respectively, and is used to drive the first positioning assembly and the second positioning assembly to reciprocate along the length direction of the machine body between an initial position close to the machine head and a completion position away from the machine head. The sleeve is sleeved outside the third positioning assembly, and can move toward the completion position with the first positioning assembly and the second positioning assembly so that the inner tube is inserted into the sleeve, and can move toward the initial position with the first positioning assembly and the second positioning assembly so that the head end of the sleeve and the head end of the inner tube return to the initial position. At the completion position, the relative distance between the first positioning assembly and the second positioning assembly is less than or equal to the relative distance between the first positioning assembly and the second positioning assembly at the initial position.

2. The pipe threading device according to claim 1, characterized in that: When in the completion position, the first positioning assembly and the second positioning assembly are close to each other, and a first position sensor for detecting the closeness of the first positioning assembly relative to the second positioning assembly is provided between the first mounting arm and the second mounting arm; The reciprocating motion has a first stroke from the initial position to the finished position, and a second stroke from the finished position to the initial position. In the first stroke, the distance between the first positioning component and the second positioning component at the finished position is smaller than the relative distance between the first positioning component and the second positioning component at the initial position. In the second stroke, the distance between the first positioning component and the second positioning component at the finished position is equal to the relative distance between the first positioning component and the second positioning component at the initial position.

3. The pipe threading device according to claim 2, characterized in that: The machine body is provided with a second position sensor for detecting that the first mounting arm is located at one end of the machine body close to the machine head, a third position sensor for detecting that the second mounting arm is located at one end of the machine body close to the machine head, and a fourth position sensor for detecting that the second mounting arm is located at one end of the machine body away from the machine head. The third position sensor is located on the side of the second sensor away from the machine head.

4. The pipe threading device according to claim 2, characterized in that: The driving mechanism includes a first driving structure for driving the first positioning component to reciprocate between an initial position and a finished position, and a second driving structure for driving the second positioning component to reciprocate between an initial position and a finished position. In the first stroke, the relative distance between the first positioning component and the second positioning component at the initial position can be adjusted by the first driving structure and the second driving structure.

5. The pipe threading device according to claim 4, characterized in that: The first driving structure includes a first conveying member arranged on the machine body along the length direction of the machine body, and a first driving member used to drive the first conveying member to reciprocate between an initial position and a completion position along the length direction of the machine body, the first mounting arm is positioned and connected to the first conveying member, the sleeve can move toward the completion position with the first conveying member so that the inner tube is inserted into the sleeve, and can move toward the initial position with the first conveying member so that the head end of the sleeve returns to the initial position; The second driving structure includes a second conveying member arranged on the machine body along the length direction of the machine body, and a second driving member used to drive the second conveying member to reciprocate along the length direction of the machine body, the second conveying member is arranged parallel and spaced apart from the first conveying member, the second mounting arm is positioned and connected to the second conveying member, and the head end of the inner tube can move toward the completion position or the initial position with the second conveying member to move in coordination with the head end of the sleeve; The driving mechanism also includes a control panel arranged on the machine head, the first driving member and the second driving member are electrically connected to the control panel respectively, and the relative distance between the first positioning component and the second positioning component is adjusted by controlling the first driving member and the second driving member through the control panel.

6. The pipe threading device according to claim 5, characterized in that: The two sides of the machine body are respectively provided with slide rails arranged along the length direction of the machine body, the first mounting arm is respectively provided with two first sliders slidably connected to the slide rails on the two sides, the first mounting arm is also provided with a first positioning block positioned and connected to the first conveying member, the first positioning block is arranged between the two first sliders, the first conveying member is configured as a synchronous belt, the first driving structure further comprises first driving wheel groups respectively sleeved on the inner sides of the two ends of the first conveying member, and the first driving member is drivingly connected to one of the first driving wheel groups; The second mounting arm is respectively provided with two second sliding blocks slidably connected to the slide rails on both sides, and the second mounting arm is also provided with a second positioning block positioned and connected to the second conveying member, the second positioning block is arranged between the two second sliding blocks, the second conveying member is configured as a synchronous belt, and the second driving structure also includes second driving wheel groups respectively sleeved on the inner sides of both ends of the second conveying member, and the second driving member is drivingly connected to one of the second driving wheel groups.

7. The pipe threading device according to any one of claims 1 to 6, characterized in that: The first positioning assembly includes a first positioning member arranged on the first mounting arm, a first main clamp and a first auxiliary clamp arranged on the first positioning member, a sleeve member arranged between the first main clamp and the first auxiliary clamp, and a first switch member arranged on the first mounting arm and / or the first positioning member, wherein the first switch member is used to control the first main clamp and the first auxiliary clamp to move away from each other to an open state and move closer to each other to a use state, and in the use state, the first end of the sleeve can be clamped and positioned between the sleeve member, the first main clamp and the first auxiliary clamp; The second positioning assembly includes a second positioning member arranged on the second mounting arm, a second main clamp and a second auxiliary clamp arranged relatively on the second positioning member, and a second switch member arranged on the second mounting arm and / or the second positioning member, the second switch member is used to control the second main clamp and the second auxiliary clamp to move relatively away from each other to an open state, and relatively close to each other to a use state, and in the use state, the head end of the inner tube can be clamped and positioned between the second main clamp and the second auxiliary clamp.

8. The pipe threading device according to claim 7, characterized in that: The first main clamp and the first auxiliary clamp are arranged on a side close to the machine head below the first mounting arm through the first positioning member, and a accommodating area is formed between the lower side of the first mounting arm and the first main clamp and the first auxiliary clamp, and the second positioning member includes a second positioning portion arranged below the second mounting arm and extending toward the first positioning member, and the second main clamp and the second auxiliary clamp are arranged on an end of the second positioning portion close to the first positioning member, and when in the completed position, the second positioning portion can extend into the accommodating area to allow the second main clamp and the second auxiliary clamp to approach the first main clamp and the first auxiliary clamp.

9. The pipe threading device according to claim 8, characterized in that: The third mounting arm includes a positioning shaft and a positioning wheel connected to the positioning shaft, the outer periphery of the positioning wheel is recessed with a traction groove along its circumferential direction, the third positioning assembly includes a traction member, and a clamp connected to the head end of the traction member, the traction member is configured in a hook shape and hung on the traction groove, the end of the inner tube can be positioned and connected to the clamp, the head end of the sleeve can be sleeved toward the head end of the traction member through the end of the traction member, and clamped and positioned between the first main clamp and the first auxiliary clamp, and when the sleeve moves toward the completion position with the first positioning structure, the positioning wheel can rotate around the axis of the positioning shaft to guide the sleeve to move along the traction groove.

10. The pipe threading device according to claim 9, characterized in that: The first mounting arm is provided with a plurality of first positioning components, and the first mounting arm is also provided with a first power source structure, each of the first positioning components is connected to the first power source structure through a first power tube, and the power medium in the first power source structure can enter the first positioning component along the first medium channel in the first power tube to drive the first main clamp and the first auxiliary clamp to be relatively close to each other until they are in use, and the first switch is connected to the first power tube for opening or closing the first medium channel in the first power tube; The second mounting arm is provided with a plurality of second positioning components arranged one by one corresponding to the first positioning components, and the second mounting arm is provided with a second power source structure, each of the second positioning components is connected to the second power source structure through a second power tube, and the power medium in the second power source structure can enter the second positioning component along the second medium channel in the second power tube to drive the second main clamp and the second auxiliary clamp to be relatively close to each other until they are in use, and the second switch is connected to the second power tube for opening or closing the second medium channel in the second power tube; The positioning shaft is provided with a plurality of positioning wheels arranged one-to-one corresponding to the first positioning components, and a third positioning component hung on the positioning wheels.

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