Threading assembly capable of being rapidly replaced for wire pipe flexible threading machine

Abstract

A threading assembly capable of being rapidly replaced for a wire pipe flexible threading machine comprises a wire spool, a shaft penetrating hole is formed in the center of the wire spool, a plurality of circles of pull wires are wound around the wire spool, a plurality of circles of tubular flexible bags are wound around the outer portions of the pull wires, the outer ends of the tubular flexible bags are open when the tubular flexible bags are inflated, the inner ends of the tubular flexible bags are closed, and the closed ends of the tubular flexible bags are connected with the outer ends of the pull wires. According to the utility model, the principle is scientific, compressed air is adopted to drive the tubular flexible bag to unfold and move along the threading pipe, the tubular flexible bag drives the pull wire to perform threading operation in the outward turning and rolling process, and then the pull wire pulls a wire or a cable to perform threading operation, so that the operation mode is more convenient, the cost is low, and the threading assembly is convenient to replace; the threading efficiency is high, the threading success rate is high, and the threading device is particularly suitable for threading operation of threading pipes with larger bending degree and turning direction.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of building construction, and particularly relates to a threading assembly of a flexible wire pipe threading machine which can be quickly replaced. BACKGROUND

[0002] In building construction, electrical wire pipes are usually arranged in walls or floors in a pre-buried manner. After the main body of the building is completed, electrical wires or cables are threaded into the electrical wire pipes. When threading the electrical wires or cables, a steel wire lead is first threaded into the electrical wire pipe, and the electrical wire is bound to one end of the lead, and the other end of the steel wire lead is pulled to make the electrical wire enter the electrical wire pipe. At present, the work of threading the lead into the electrical wire pipe is mostly completed by manual work, and the worker winds the front end of the steel wire lead with adhesive tape and then threads it into the wire pipe and slowly pushes the steel wire lead forward. Generally, the electrical wire pipe is long and may be curved, so there are many difficulties in manual threading, and the threading process is time-consuming and laborious. The utility model patent (patent application number 201811048348.2) applied by the applicant discloses a simple rotary threading machine driven by a hand drill. However, the threading machine has the disadvantages of complex structure, high manufacturing cost and complicated operation process, and therefore, it is urgent to improve the existing threading technology. SUMMARY

[0003] The utility model discloses in order to solve the deficiency in the prior art, provide a convenient operation, threading construction efficiency is high, the cost is low wire pipe flexible threading machine quick replacement threading assembly.

[0004] To solve the above technical problems, the utility model adopts the following technical scheme: the threading assembly of the flexible wire pipe threading machine which can be quickly replaced, comprising a winding reel, a through shaft hole is formed in the center of the winding reel, a plurality of turns of a traction line are wound on the winding reel, a plurality of turns of a tubular flexible bag are wound outside the traction line, the outer end of the tubular flexible bag is open and the inner end is closed when it is inflated, and the closed end of the tubular flexible bag is connected with the outer end of the traction line.

[0005] The traction line is woven from a plurality of thin wires, the closed end of the tubular flexible bag is a conical surface structure, the ends of the plurality of thin wires of the outer end of the traction line are uniformly divergent, and the uniformly divergent ends of the plurality of thin wires are simultaneously connected as a whole by ultrasonic welding with the conical surface structure.

[0006] The through shaft hole in the center of the winding reel is a conical hole structure with an outer thick and inner thin structure.

[0007] The inner end of the traction line is fixedly connected to the outer circle of the winding reel by ultrasonic welding.

[0008] Adopting the technical scheme, the wire pipe flexible threading machine further comprises a compressed air feeding system, a winding disc positioning and rotating assembly and a guide pipe assembly. The winding disc positioning and rotating assembly comprises a top-opened cylindrical shell, a fixed shaft is arranged at the bottom center of the cylindrical shell, a through shaft hole in the center of the winding disc is sleeved on the fixed shaft, a cover is arranged at the top of the cylindrical shell, the inner circle of the cover is threadedly connected to the outer circle of the upper port of the cylindrical shell, the cover is provided with an air inlet pipe joint connected with the compressed air feeding system, and the outer circle side of the cylindrical shell is provided with an air outlet pipe joint.

[0009] The guide pipe assembly comprises a flexible corrugated pipe, a crimped pipe joint and a locking nut. The outer circle of the crimped pipe joint is sequentially provided with an outer circle conical structure, a positioning ring and a cylindrical structure in the axial direction. The locking nut is threadedly connected to the air outlet pipe joint. The outer end of the locking nut is provided with a limiting ring sleeved on the cylindrical structure. The inner circle of the outer end of the air outlet pipe joint is an inner circle conical structure. The open end of the tubular flexible bag is sleeved on the outer circle of the outer circle conical structure. The limiting ring is positioned by pressing the positioning ring from the inside, so that the outer circle conical structure is inserted into the inside of the inner circle conical structure. The open end of the tubular flexible bag is crimped between the outer circle conical structure and the inner circle conical structure.

[0010] The cylindrical structure outer circle of the crimped pipe joint is glued to the port inner circle of the flexible corrugated pipe as a whole. The outer circle diameter of the flexible corrugated pipe is greater than the inner diameter of the limiting ring.

[0011] The specific working process of using the wire pipe flexible threading machine for threading operation comprises the following steps:

[0012] (1) The open end of the tubular flexible bag is sleeved on the outer circle of the outer circle conical structure of the crimped pipe joint. Then the outer circle conical structure of the crimped pipe joint is inserted into the air outlet pipe joint. The open end of the tubular flexible bag is located between the outer circle conical structure and the inner circle conical structure. Then the locking nut is rotated, so that the locking nut is screwed onto the air outlet pipe joint. The limiting ring is positioned by pressing the positioning ring from the inside, so that the outer circle conical structure moves towards the inside of the inner circle conical structure. The open end of the tubular flexible bag is crimped between the outer circle conical structure and the inner circle conical structure.

[0013] (2) The compressed air feeding system is connected to the air inlet pipe joint on the cover. The flexible corrugated pipe is inserted into one port of the threading pipe.

[0014] (3), start the compressed air supply system, compressed air through the air inlet pipe joint into the cylinder shell inside, compressed air in the closed cylinder shell can only be discharged through the gas outlet pipe joint of the outer side of the cylinder shell, because the tubular flexible bag will close the gas outlet pipe joint, at this time the compressed air can only push the tubular flexible bag along the pressure joint, flexible corrugated conduit into the threading pipe, and always along the threading pipe outside and rolling travel, the tubular flexible bag drives the reel around the fixed shaft, when the closed end of the tubular flexible bag is separated from the reel, the traction line wound on the reel is started to be pulled out of the reel by the closed end of the tubular flexible bag, until the closed end of the tubular flexible bag passes out of the other end of the threading pipe, at the same time, the end of the traction line is also taken out of the threading pipe, and the compressed air supply system is closed.

[0015] (4), the end of the traction line that passes out of the threading pipe is connected to a cable or other wire, and the cable or other wire is pulled through the traction line, so that the cable or other wire is smoothly threaded.

[0016] The working principle of the threading machine is that the compressed air pushes the tubular flexible bag to roll and advance in the threading pipe, that is, the folded position of the inner wall of the tubular flexible bag rolls and advances under the push of the compressed air, and at the same time, the inner wall of the flexible bag is turned to the outside, when the closed end of the tubular flexible bag corresponds to the fixed end, the closed end of the tubular flexible bag drives the traction line to advance together. This advancing mode will not scratch the flexible bag due to the sharp protrusions on the inner wall of the threading pipe, and after the tubular flexible bag and the traction line complete the pipe threading, the traction line can be used to pull the electric wire or cable for threading operation.

[0017] If the tubular flexible bag is driven to slide and advance, it will inevitably be damaged due to friction, and the sliding resistance will increase after long-distance pipe threading.

[0018] The tubular flexible bag is soft and flexible, and can automatically find the direction with low pressure when encountering the elbow of the threading pipe, that is, it can flexibly pass through various elbows. Before threading, the approximate length of the threading pipe is known, and a tubular flexible bag with a corresponding length is used for pipe threading. The length of the tubular flexible bag is generally slightly longer than the threading pipe.

[0019] The entire threading assembly of the utility model can be replaced once, only the cover is twisted off, and the reel can be taken out or installed on the fixed shaft. The tubular flexible bag is wound on the reel in the length direction before pipe threading, and is expanded in the length direction under the blowing of compressed air, so as to drive the traction line to perform pipe threading operation.

[0020] The locking nut is used to press-fit the outer conical structure and the inner conical structure of the pressure joint, and the open end of the tubular flexible bag is press-fitted between the outer conical structure and the inner conical structure. This structure and fastening mode not only make the air-tight seal more airtight, but also facilitate the installation and replacement of the tubular flexible bag.

[0021] The through shaft hole of the wire reel center is a conical hole structure with outer thick and inner thin, which plays a guiding role, so as to facilitate the insertion of the fixed shaft.

[0022] In summary, the utility model principle science, first adopt compressed air drive tubular flexible bag along the threading pipe unfolding movement, tubular flexible bag in the process of turning over rolling drive traction line to carry on the threading operation, then through the traction line to pull the wire or cable to carry on the threading operation, so that the operation mode is more convenient, low in cost, convenient to replace the threading assembly, so that the threading efficiency is high, the threading success rate is high, especially suitable for the threading operation of the threading pipe with greater bending degree and direction change. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is the axial sectional view structure schematic diagram of the wire reel positioning rotation assembly and the guide pipe assembly when installing the tubular flexible bag;

[0024] Figure 2 is Figure 1 the axial sectional view structure schematic diagram of the wire reel positioning rotation assembly and the guide pipe assembly in the middle;

[0025] Figure 3 is the external three-dimensional structure schematic diagram of the wire reel positioning rotation assembly and the guide pipe assembly;

[0026] Figure 4 is Figure 1 the A-A sectional view;

[0027] Figure 5 is the external three-dimensional structure schematic diagram of the utility model;

[0028] Figure 6 is the schematic diagram of the traction line and the closed end of the tubular flexible bag;

[0029] Figure 7 is the schematic diagram of the tubular flexible bag turning over and rolling in the threading pipe. DETAILED DESCRIPTION

[0030] As Figures 1-6 shown, the wire pipe flexible threading machine replaceable threading assembly includes a wire reel 5, a through shaft hole 17 is arranged in the center of the wire reel 5, a plurality of traction lines 2 are wound on the wire reel 5, a plurality of tubular flexible bags 1 are wound outside the traction lines 2, the outer end of the tubular flexible bag 1 is open and the inner end is closed when the tubular flexible bag 1 is inflated and expanded, and the closed end 15 of the tubular flexible bag 1 is connected with the outer end of the traction line 2.

[0031] The traction line 2 is woven by multiple thin lines, the closed end 15 of the tubular flexible bag 1 is a conical surface structure, the multiple thin line ends 18 of the outer end of the traction line 2 are uniformly divergent, and the uniformly divergent multiple thin line ends 18 are simultaneously connected as a whole with the conical surface structure by means of ultrasonic welding.

[0032] The through shaft hole 17 in the center of the winding disc 5 is a conical hole structure 19 with an outer thick and inner thin structure.

[0033] The inner end of the traction line 2 is fixedly connected on the outer circle of the winding disc 5 by means of ultrasonic welding.

[0034] The wire tube flexible threading machine further comprises a compressed air feeding system (not shown in the figure), a winding disc positioning and rotating assembly, and a guide pipe assembly. The winding disc positioning and rotating assembly comprises a top-opened cylindrical shell 3, a fixed shaft 4 is arranged at the bottom center of the cylindrical shell 3, the through shaft hole 17 in the center of the winding disc 5 is sleeved on the fixed shaft 4, a cover 6 is arranged at the top of the cylindrical shell 3, the inner circle of the cover 6 is threadedly connected on the outer circle of the upper port of the cylindrical shell 3, an air inlet pipe joint 7 connected with the compressed air feeding system is arranged on the cover 6, and an air outlet pipe joint 8 is arranged on the outer circle side of the cylindrical shell 3.

[0035] The guide pipe assembly comprises a flexible corrugated pipe 9, a crimped pipe joint, and a locking nut 10. The outer circle of the crimped pipe joint is sequentially provided with an outer conical structure 11, a positioning ring 12, and a cylindrical structure 13 in the axial direction. The locking nut 10 is threadedly connected on the air outlet pipe joint 8. The outer end of the locking nut 10 is provided with a limiting ring 14 sleeved on the cylindrical structure 13. The inner circle of the outer end of the air outlet pipe joint 8 is an inner conical structure. The open end of the tubular flexible bag 1 is sleeved on the outer circle of the outer conical structure 11. The limiting ring 14 is positioned by pressing the positioning ring 12 from the inside, so that the outer conical structure 11 extends into the inner conical structure. The open end of the tubular flexible bag 1 is crimped between the outer conical structure 11 and the inner conical structure.

[0036] The outer circle of the cylindrical structure 13 of the crimped pipe joint is glued as a whole with the port inner circle of the flexible corrugated pipe 9, and the outer circle diameter of the flexible corrugated pipe 9 is greater than the inner diameter of the limiting ring 14. The outer circle of the locking nut 10 is provided with an anti-skid rib structure.

[0037] The specific working process of using the wire tube flexible threading machine to perform threading operation includes the following steps:

[0038] (1) First, the open end of the tubular flexible bag 1 is sleeved outside the outer conical structure 11 of the compression pipe joint, and then the outer conical structure 11 of the compression pipe joint is inserted into the air outlet pipe joint 8, the open end of the tubular flexible bag 1 is located between the outer conical structure 11 and the inner conical structure, and then the locking nut 10 is rotated to make the locking nut 10 screwed onto the air outlet pipe joint 8, the inner side of the limiting ring 14 moves the outer conical structure 11 to the inside of the inner conical structure by pressing the positioning ring 12, and the open end of the tubular flexible bag 1 is compressed between the outer conical structure 11 and the inner conical structure;

[0039] (2) Connect the air inlet pipe joint 7 on the compression air supply system connecting cover 6, and the flexible corrugated pipe 9 is inserted into one port of the threading pipe 16;

[0040] (3) Start the compression air supply system, and the compressed air enters the inside of the cylindrical shell 3 through the air inlet pipe joint 7. The compressed air in the closed cylindrical shell 3 can only be discharged through the air outlet pipe joint 8 on the outer side of the cylindrical shell 3. Since the tubular flexible bag 1 seals the air outlet pipe joint 8, the compressed air can only push the tubular flexible bag 1 along the compression pipe joint, the flexible corrugated pipe 9 into the threading pipe 16, and keep rolling along the threading pipe 16 (as shown in Figure 7 , the arrow in the figure points to the outside turning direction), and the tubular flexible bag 1 drives the winding reel 5 to rotate around the fixed shaft 4. When the closed end 15 of the tubular flexible bag 1 is separated from the winding reel 5, the traction line 2 wound on the winding reel 5 is pulled out of the winding reel 5 by the closed end 15 of the tubular flexible bag 1, until the closed end 15 of the tubular flexible bag 1 passes out of the other port of the threading pipe 16, and at the same time, the end of the traction line 2 is also taken out of the threading pipe 16, and the compression air supply system is turned off;

[0041] (4) Connect the end of the traction line 2 taken out of the threading pipe 16 to a cable or other wire, and pull the cable or other wire through the traction line 2 to smoothly perform the threading operation.

[0042] The working principle of the threading machine is that the compressed air pushes the tubular flexible bag 1 to roll and advance in the threading pipe 16, that is, the folding position of the inner wall of the tubular flexible bag 1 rolls and advances under the push of the compressed air, and at the same time, the inner wall of the flexible bag is turned to the outside. When the closed end 15 of the tubular flexible bag 1 corresponds to the fixed end, the closed end 15 of the tubular flexible bag 1 drives the traction line 2 to advance together. This advancing mode will not scratch the flexible bag due to the sharp protrusions on the inner wall of the threading pipe 16. After the tubular flexible bag 1 and the traction line 2 complete the pipe threading, the traction line 2 can be used to pull the wire or cable to perform the threading operation.

[0043] If the tubular flexible bag 1 is driven to slide and advance, it will inevitably cause the flexible bag to be damaged due to friction, and the sliding resistance will increase after long-distance pipe threading.

[0044] The tubular flexible bag 1 is soft and flexible, and can automatically find the direction with low pressure to pass when encountering the elbow of the pipe 16, that is, it can pass through various elbows flexibly. Before the pipe is threaded, the approximate length of the pipe 16 to be threaded is known, and the tubular flexible bag 1 with the corresponding length is used to thread the pipe. The length of the tubular flexible bag 1 is generally slightly longer than the pipe 16 to be threaded.

[0045] The whole threading assembly of the utility model can be replaced once, and only the cover 6 is unscrewed, and the reel 5 is taken out or installed from the fixed shaft 4. The tubular flexible bag 1 is wound on the reel 5 in the length direction before the pipe is threaded, and is expanded along the length direction by the blowing of compressed air, so as to drive the traction line 2 to carry out the pipe threading operation.

[0046] The locking nut 10 is adopted to make the outer conical structure 11 and the inner conical structure of the compression joint matched, and the open end of the tubular flexible bag 1 is compressed between the outer conical structure 11 and the inner conical structure, and the structure and the fastening mode of operation not only make the air seal more tight, but also facilitate the installation and replacement of the tubular flexible bag 1.

[0047] The through shaft hole 17 in the center of the reel 5 is a conical hole structure 19 with thick outer and thin inner, which plays a guiding role, so that the fixed shaft 4 is conveniently threaded.

[0048] The embodiment is not any form of limitation on the shape, material, structure and the like of the utility model, and any simple modification, equivalent change and modification of the above embodiment according to the technical essence of the utility model are all within the protection scope of the technical scheme of the utility model.

Claims

1. A wire tube flexible threading machine with replaceable threading assembly, characterized in that: The reel is provided with a through shaft hole in the center, and a plurality of turns of traction lines are wound on the reel.

2. The quick change cable assembly of claim 1, wherein: The traction line is made of a plurality of thin wires, and the closed end of the tubular flexible bag is provided with a conical surface structure.

3. The quick-change threading assembly of claim 1 or 2, wherein: The through shaft hole in the center of the reel is provided with a conical hole structure with an outer thick and inner thin structure.

4. The quick-change wire threading assembly of claim 1 or 2, wherein: The inner end of the traction line is fixedly connected to the outer circle of the reel by ultrasonic welding.

Images