Rapid pulling-out device for thin-wall pipe fitting

Abstract

According to the rapid pulling-out device for the thin-wall pipe fitting, through cooperation of a handheld part and a pulling-out part, the pulling-out part comprises a conical head bolt and a bolt sleeve coaxially sleeved with the conical head bolt, an opening is formed in the upper end of the bolt sleeve, the opening side faces the thin-wall pipe fitting during installation, and an external thread and a clamping end are sequentially arranged at the lower end of the conical head bolt; after the fastening nut and the conical head bolt are sleeved, the external threads and the square end are exposed, it is guaranteed that counter torque can still be applied when the friction force between the fastening nut and the conical head bolt in the bolt sleeve and the inner wall of the thin-wall pipe fitting is invalid through a wrench, and the opening portion of the bolt sleeve is expanded tightly; the gravity centers of the two ends of the guide rod are kept relatively balanced, and the device drives the thin-wall pipe to be taken out of the drawing die through impact force.

Description

Technical Field

[0001] The utility model belongs to the technical field of through - ground wire construction, and particularly relates to a device for quickly pulling out thin - wall pipe fittings. Background Technique

[0002] In the process of continuous drawing of through - ground wires, the fracture of brass tubes is a common fault during the drawing process. When the fractured brass tube gets stuck in the die, the length of the handling time is directly related to the production efficiency. Additionally, if not handled properly, it may even cause damage to the die, affecting product quality and safety.

[0003] To deal with the fracture of brass tubes, as an emergency measure, the applicability of the device (tool) for pulling out brass tubes plays a crucial role.

[0004] When dealing with the problem of brass tube fracture, it is necessary to pay attention to the impact of handling time on production efficiency and attach importance to the applicability of the pulling - out device (tool). By optimizing the pulling - out device, the handling time can be effectively shortened and the production efficiency can be improved.

[0005] According to the investigation of existing devices in use, currently, when on - site operators deal with the problem of brass tube fracture, they mainly use wire cutters for operation. The specific operation process is as follows:

[0006] Using wire cutters: Operators first use the cutting edge of the wire cutters to flatten the brass tube.

[0007] Selecting a fulcrum: Subsequently, select the edge of the equipment as the fulcrum because the edge provides stable support, which helps with the subsequent pulling - out operation.

[0008] Applying lateral force: After determining the fulcrum, the operator applies lateral force and tries to pull out the fractured brass tube from the die using the lever principle.

[0009] However, this operation method has several significant problems:

[0010] (1) Difficult to master the force: When pulling out the brass tube using the lever action, the operator needs to precisely control the force. Excessive force may cause damage to the equipment or wire cutters, while too little force may cause slipping and the brass tube cannot be successfully pulled out.

[0011] (2) The cutting edge is easily damaged: The cutting edge of the wire cutters is easily worn and damaged when it comes into contact with the brass tube and attempts to flatten it. This not only affects the pulling - out efficiency but also increases the operation cost and maintenance work.

[0012] In summary, although using a cable cutter to pull out the brass tube is a feasible method, due to problems such as difficulty in controlling the force and easy damage of the blade edge, this method has certain limitations and challenges in actual operation. Therefore, it is necessary to explore a more efficient and safe pulling-out method to improve production efficiency and reduce maintenance costs.

[0013] The utility model with the publication number CN209222901U discloses a brass tube drawing device. The key points of its technical solution include a lifting device and a clamping device. The clamping device is fixedly installed at the bottom of the lifting device. During use, the motor drives the rotating rod to rotate, causing the rope drum to rotate. The clamping device descends, the first electric telescopic rod drives the connecting rod to rise, the rotating shaft rises, driving the left plate and the right plate to rise. The pressing wheel causes the top of the left plate and the top of the right plate to rotate on the rotating shaft to clamp the brass tube. Two second electric telescopic rods drive two rotating blocks to contract. The clamping plate rotates at the bottom through the movable shaft, and the clamping plate clamps the top of the brass tube. The motor drives the rotating rod to rotate in the reverse direction, the rope drum rotates in the reverse direction, and the steel wire rope drives the clamping device to rise to draw out the brass tube. It mainly uses two layers of clamping devices to clamp the brass tube with a thinner upper part and a thicker lower part. However, its pulling effect on the broken brass tube in the ground wire co-drawing process is not good. Utility Model Content

[0014] The purpose of the present utility model is to address the deficiencies of the above-mentioned existing technologies and provide a rapid pulling-out device for thin-walled pipe fittings to solve the problem that thin-walled pipe fittings are difficult to remove when stuck in the drawing die.

[0015] To solve the above technical problems, the technical solution adopted by the present utility model is:

[0016] A rapid pulling-out device for thin-walled pipe fittings includes a handheld part and a pulling-out part arranged at the front end of the handheld part. The pulling-out part includes a tapered head bolt and a bolt sleeve coaxially sleeved therewith, and an opening is provided at the upper end of the bolt sleeve, with the opening side facing the thin-walled pipe fitting during installation;

[0017] The lower end of the tapered head bolt is successively provided with an external thread and a clamping end. The bolt sleeve is sleeved on the tapered head bolt and limited by a configured fastening nut. After being sleeved, the external thread and the clamping end of the tapered head bolt are exposed;

[0018] The front end of the handheld part is threadedly connected to the tapered head bolt through a configured reduced-diameter connecting piece.

[0019] The handheld part includes a grip, a guide rod, and a slider slidably sleeved on the guide rod, and the front end of the guide rod is threadedly connected to the reduced-diameter connecting piece.

[0020] The outer diameter of the fastening nut is larger than the inner diameter of the brass tube to be drawn.

[0021] A plurality of openings are circumferentially provided at the upper end opening of the bolt sleeve.

[0022] The inner hole of the diameter-changing connecting piece is provided with an internal thread and is threadedly connected to the front end of the guide rod.

[0023] Both the slider and the gripping part of the grip are provided with surface knurling structures.

[0024] The clamping end is a square end and is fixedly arranged at the end of the tapered head bolt.

[0025] Both ends of the slider are provided with hand guard structures arranged in an outwardly spreading manner.

[0026] The side of the grip facing the slider is also provided with a hand guard structure.

[0027] The beneficial effects of the present utility model are as follows:

[0028] (1) For the rapid pulling-out device of the thin-walled pipe fitting, through the cooperation of the handheld part and the pulling-out part, the pulling-out part includes a tapered head bolt and a bolt sleeve coaxially sleeved therewith, and an opening is provided at the upper end of the bolt sleeve. When installing, the opening side faces the thin-walled pipe fitting. The lower end of the tapered head bolt is successively provided with an external thread and a clamping end, and after being sleeved, the external thread and the square end are exposed, ensuring that when the frictional force between the fastening nut and the tapered head bolt on the inner wall of the bolt sleeve and the thin-walled pipe fitting fails, a counter torque can still be applied by using a wrench, so that the opening part of the bolt sleeve expands and tightens. The front end of the handheld part is threadedly connected to the tapered head bolt through a diameter-changing connecting piece, maintaining the relative balance of the center of gravity at both ends of the guide rod, and using the impact force to drive the device to take out the thin-walled pipe fitting from the drawing die.

[0029] (2) For this device, different connecting parts can be selected according to thin-walled products of different specifications and models to provide special handling tools, which can be used for emergency handling in the processing of thin-walled products.

[0030] (3) This device represents the latest achievement in the technology of pulling out brass pipes, greatly improving the pulling-out efficiency and quality and reducing the consumption of human resources.

[0031] (4) Ensure operation safety. There are potential safety hazards in the original pulling-out method, such as injuries or equipment damage caused by improper operation. However, this rapid pulling-out device is more suitable for the working site usage scenario and is safe and effective. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is the structural explosion diagram of the present utility model;

[0033] Figure 2 is the assembly diagram of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0034] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification.

[0035] Please refer to Figure 1 . It should be noted that the structures, proportions, sizes, etc. shown in the drawings of this specification are only used to match the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the implementation conditions of the present utility model. Therefore, they do not have substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the efficacy that the present utility model can produce and the purpose that can be achieved, should still fall within the scope that the technical content disclosed by the present utility model can cover.

[0036] The present utility model provides a device for quickly pulling out thin-walled pipe fittings, as shown in Figure 1 and Figure 2 .

[0037] A device for quickly pulling out thin-walled pipe fittings includes a handheld part and a pulling-out part arranged at the front end of the handheld part. The pulling-out part includes a tapered head bolt 3 and a bolt sleeve 6 coaxially sleeved therewith. An opening is provided at the upper end of the bolt sleeve 6, and the opening side faces the thin-walled pipe fitting 8 during installation; the lower end of the tapered head bolt 3 is sequentially provided with an external thread and a clamping end. For convenient clamping, the clamping end is a square end and is fixed at the end of the tapered head bolt 3; the bolt sleeve 6 is sleeved on the tapered head bolt 3 and is limited by a configured fastening nut 7. After being sleeved, the external thread and the square end are exposed, ensuring that a reverse torque can still be applied by using a wrench to the fastening nut 7 and the tapered head bolt 3 when the frictional force between the bolt sleeve 6 and the inner wall of the thin-walled pipe fitting 8 fails, so that the opening part of the bolt sleeve 6 expands, and the front end of the handheld part is threadedly connected to the tapered head bolt 3 through a configured reducing connector 2.

[0038] The reducing connector 2, the fastening nut 7, the bolt sleeve 6 and the tapered head bolt 3 are adjusted to corresponding specifications according to the inner diameter range of the thin-walled pipe fitting 8; and the outer diameter of the fastening nut 7 is larger than the inner diameter of the thin-walled pipe fitting 8 to be pulled. During sleeving, the tapered head bolt 3 and the bolt sleeve 6 enter the thin-walled pipe fitting 8, while the outer diameter of the fastening nut 7 is large and is located outside the thin-walled pipe fitting 8. By using two wrenches, reverse torques are respectively applied to the fastening nut 7 and the square end until the bolt sleeve 6 is tightened; then the reducing connector 2 is sleeved on. The reducing connector 2 is threadedly connected to the exposed external thread through an internal thread. After assembly, the square end is located inside the reducing connector 2.

[0039] For sufficient tensioning, a plurality of openings are provided along the circumferential direction at the upper end opening of the bolt sleeve 6.

[0040] In this embodiment, the thin-walled pipe fitting 8 is a brass pipe. The handheld part includes a grip 5, a guide rod 1, and a slider 4 slidably sleeved on the guide rod 1. The front end of the guide rod 1 is threadedly connected to the variable-diameter connecting piece 2; an internal thread is provided in the inner hole of the variable-diameter connecting piece 2 and is threadedly connected to the front end of the guide rod 1. The grip 5 is arranged on the side away from the brass pipe, and the front-end expansion effect is used as the distal support for applying force. When the slider 4 slides along the guide rod 1 for hammering operation, the relative balance of the center of gravity at both ends of the guide rod 1 can be maintained.

[0041] Preferably, at both ends of the slider 4 and in the reciprocating impact area of the grip 5 towards the slider 4 along the guide rod 1, a handguard structure is provided according to the human hand to avoid accidental operation in the working area and prevent the hand from being injured; both the slider 4 and the grip part of the grip 5 are provided with surface knurling structures to prevent slipping and improve the pressure borne by the hand, and avoid finger pinching.

[0042] The guide rod 1 is connected to the variable-diameter connecting piece 2, the slider 4 is slidably sleeved on the guide rod, and the grip 5 is sleeved on the top end of the guide rod 1. Then, hold the grip 5 with one hand and hold the middle part of the slider 4 with the other hand, and repeatedly impact the grip 5 with the slider 4 to drive the device to take out the thin-walled pipe fitting from the drawing die by using the impact force.

[0043] When drawing the thin-walled pipe fitting, its working process is as follows:

[0044] The bolt sleeve 6 is sleeved on the tapered bolt 3 and enters the thin-walled pipe fitting, and the fastening nut 7 is located outside the thin-walled pipe fitting 8. Then, use two wrenches to apply reverse torques to the fastening nut 7 and the square end respectively until the bolt sleeve 6 is tightened; then sleeve on the variable-diameter connecting piece 2. The variable-diameter connecting piece 2 is threadedly connected to the external thread exposed on the tapered bolt 3, and the square end passes through the variable-diameter connecting piece and is located in its inner hole. Then connect the handheld part to the variable-diameter connecting piece, the slider is slidably sleeved on the guide rod, and the grip is sleeved on the top end of the guide rod. The working state diagram after assembly is as Figure 2 shown.

[0045] Hold the grip 5 with one hand and hold the middle part of the slider 4 with the other hand, and repeatedly impact the grip 5 with the slider 4. The grip 5 is arranged on the side away from the brass pipe, and the front-end expansion effect is used as the distal support for applying force. When the slider 4 slides along the guide rod for hammering operation, the relative balance of the center of gravity at both ends of the guide rod can be maintained, and the device is driven to take out the thin-walled pipe fitting from the drawing die by using the impact force.

[0046] If terms such as "first" and "second" are used to limit components in this patent, those skilled in the art should understand that the use of "first" and "second" is only for the convenience of describing the present invention and simplifying the description, and these terms have no special meanings.

[0047] The foregoing has shown and described the basic principles, principal features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not restricted by the above-described embodiments, which are only used to illustrate the principles of the present utility model. Without departing from the spirit and scope of the present utility model, various changes and modifications can be made, and all such changes and modifications fall within the scope of the utility model claimed. The scope of protection claimed for the present utility model is defined by the appended claims and their equivalents.

[0048] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "front", "rear", "left", "right", "center", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present utility model.

Claims

1. A rapid extraction device for thin-walled pipe fittings, characterized in that: It includes a handheld part and a pulling-out part arranged at the front end of the handheld part. The pulling-out part includes a tapered head bolt and a bolt sleeve coaxially sleeved therewith, and an opening is provided at the upper end of the bolt sleeve, and the opening side faces the thin-walled pipe fitting during installation; The lower end of the tapered head bolt is successively provided with an external thread and a clamping end. The bolt sleeve is sleeved on the tapered head bolt and limited by a configured fastening nut, and after the two are sleeved, the external thread and the clamping end of the tapered head bolt are exposed; The front end of the handheld part is threadedly connected to the tapered head bolt through a configured reduced-diameter connecting piece.

2. The rapid extraction device for thin-walled pipe fittings according to claim 1, wherein: The handheld part includes a grip, a guide rod, and a slider slidably sleeved on the guide rod, and the front end of the guide rod is threadedly connected to the reduced-diameter connecting piece.

3. A rapid extraction device for thin-walled pipe fittings according to claim 1, characterized in that: The outer diameter of the fastening nut is larger than the inner diameter of the brass pipe to be pulled.

4. A rapid extraction device for thin-walled pipe fittings according to claim 1, characterized in that: A plurality of openings are formed in the circumferential direction of the upper end opening of the bolt sleeve.

5. The rapid extraction device for thin-walled pipe fittings according to claim 2, characterized in that: The inner hole of the reduced-diameter connecting piece is provided with an internal thread and is threadedly connected to the front end of the guide rod.

6. A rapid extraction device for thin-walled pipe fittings according to claim 2, characterized in that: Both the slider and the gripping part of the grip are provided with a surface knurling structure.

7. A rapid extraction device for thin-walled pipe fittings according to any one of claims 1 to 6, characterized in that: The clamping end is a square end and is fixed at the end of the tapered head bolt.

8. A rapid extraction device for thin-walled pipe fittings according to claim 2, characterized in that: The two ends of the slider are provided with a handguard structure arranged in an outward extension.

9. A rapid extraction device for thin-walled pipe fittings according to claim 8, characterized in that: The grip is also provided with a handguard structure on the side facing the slider.

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