Multi-layer pipe sleeve internal detection wire threading device
The design of the conical pusher head and the push block limiting device solves the problem of difficulty in threading pipe fittings inside the insulation layer, realizing safe and efficient installation of leakage detection lines, reducing the labor intensity of workers and the risk of damage to the insulation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WEIFANG WARMPIPES ANTI CORROSIVE & HEAT INSULATEDCO
- Filing Date
- 2025-07-31
- Publication Date
- 2026-06-19
AI Technical Summary
When installing leak detection lines, in existing technologies, the front end of the pipe is difficult to enter between two adjacent layers of insulation cotton, which can easily injure workers' fingers, increase resistance, and potentially damage the insulation cotton.
A multi-layer pipe sleeve internal inspection wire threading device was designed, which adopts a conical push head and a hemispherical front end, combined with a sliding push block and a limiting device, to facilitate the separation of two adjacent layers of insulation cotton, avoiding tool use and damage to the insulation cotton.
It reduces the labor intensity of workers, avoids damage to the insulation cotton and increased resistance, and improves the convenience and safety of threading.
Smart Images
Figure CN224384922U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pipe threading technology, and in particular to a device for detecting threading inside a multi-layer pipe sleeve. Background Technology
[0002] Steel-jacketed insulated pipes are a type of pipeline used in industries such as heating, cooling, hot oil transportation, and chemical processing for insulation and cold protection. A steel-jacketed insulated pipe mainly consists of an outer steel pipe, an insulation layer, and an inner steel pipe. The insulation layer is typically a multi-layered structure made of single pieces of insulation cotton rolled up. A leak detection line is usually installed inside the insulation layer of the steel-jacketed pipe to detect leaks in the inner steel pipe.
[0003] When installing a leak detection line inside the insulation layer, a pipe fitting needs to be installed inside the insulation layer first. Then, the leak detection line is inserted into the pipe fitting. After fixing one end of the leak detection line, the pipe fitting is pulled out, leaving the leak detection line inside the insulation layer to complete the installation.
[0004] When installing pipe fittings, the flat end face of the fitting is not easy to enter between two adjacent layers of insulation. Often, workers need to manually pry open the two adjacent layers of insulation to create a gap before the fitting can be easily inserted. If the worker does not operate properly when prying open the insulation, the fitting can easily squeeze and injure the worker's fingers. Using tools is troublesome and difficult to remove. At the same time, when the flat end face of the fitting moves within the insulation layer, it is easy to scratch and damage the insulation and encounter greater resistance. Utility Model Content
[0005] To address the aforementioned shortcomings, the purpose of this utility model is to provide a multi-layer pipe sleeve internal detection line threading device, which facilitates pipe fitting installation and thus facilitates the threading of the leakage detection line within the insulation layer. The conical push head can easily separate adjacent layers of insulation cotton as it advances within the insulation layer; the hemispherical push head tip prevents the tip from piercing into a single layer of insulation cotton, thereby avoiding increased resistance to pipe advancement; the push block facilitates the separation of adjacent layers of insulation cotton, eliminating the need for workers to separate adjacent layers in advance, thus reducing the difficulty of the push head entering the insulation layer.
[0006] To achieve the above objectives, this utility model provides a multi-layer tube sleeve internal inspection wire threading device, including a tube fitting and a driving device for moving the tube fitting. One end of the tube fitting is detachably connected to a push head, and the front end of the push head is hemispherical.
[0007] The propulsion head is provided with a receiving groove, and a slidable push block is elastically connected in the receiving groove. The propulsion head is provided with a limiting device to restrict the movement of the push block.
[0008] According to the multi-layer tube sleeve internal inspection wire threading device of this utility model, the limiting device includes a limiting pin, the pushing block is provided with a limiting hole that cooperates with the limiting pin, and the pushing head is provided with a positioning hole that cooperates with the limiting pin.
[0009] According to the multi-layer tube sleeve internal detection wire threading device of this utility model, the push block is fixedly connected to the push rod, and a plurality of elastic elements are arranged inside the receiving groove. One end of each elastic element is fixedly connected to the push rod, and the other end of each elastic element is fixedly connected to the push head.
[0010] According to the multi-layer tube sleeve internal inspection wire threading device of this utility model, the push head is fixedly connected to several buckles, and the front end of the tube fitting is provided with a buckle groove that cooperates with the buckles.
[0011] According to the multi-layer tube sleeve internal inspection wire threading device of this utility model, the driving device is an electric push rod.
[0012] According to the present invention, the multi-layer tube sleeve internal inspection wire threading device has a cavity inside the tube for threading, and a reinforcing rod that fits with the inner wall of the tube is fixedly connected to the push head.
[0013] According to the multi-layer tube sleeve internal inspection wire threading device of this utility model, the push head is conical and the front end of the push block is triangular.
[0014] This utility model provides a device for threading a leak detection wire inside a multi-layered pipe sleeve, including a pipe fitting and a driving device for moving the pipe fitting. The pipe fitting facilitates the threading of the leak detection wire inside, preventing the wire from breaking inside the insulation layer due to dragging. The driving device provides power for moving the pipe fitting, reducing the labor intensity of workers. One end of the pipe fitting is detachably connected to a push head, which is conical in shape with a hemispherical front end. The conical push head easily separates adjacent layers of insulation when advancing within the insulation layer, while the hemispherical front end prevents puncture into a single layer of insulation. This design helps avoid increasing the resistance of the propulsion head's forward movement. The propulsion head is equipped with a receiving groove, within which a sliding push block is installed. The front end of the push block is triangular. The receiving groove facilitates the placement of the push block, preventing the front end of the push block from puncturing the single layer of insulation cotton when moving within the insulation layer. The triangular front end of the push block allows it to better insert into the gap between two adjacent layers of insulation cotton, eliminating the need for workers to separate the two adjacent layers of insulation cotton beforehand. The propulsion head is equipped with a limiting device to restrict the movement of the push block, preventing it from being pushed into the receiving groove as soon as it contacts the insulation cotton layer. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of this utility model;
[0016] Figure 2 This is a cross-sectional view of the structure after the limiting pin limits the push block;
[0017] Figure 3 yes Figure 2 Schematic diagram of Part A;
[0018] Figure 4 This is a cross-sectional view of the structure after the push block retracts into the receiving groove;
[0019] In the diagram: 1-pipe fitting, 2-push head, 3-receiving groove, 4-pushing block, 5-hand push rod, 6-limiting pin, 7-buckle, 8-elastic element, 9-buckle groove, 10-limiting hole, 11-reinforcing rod. Detailed Implementation
[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present utility model and are not intended to limit the present utility model.
[0021] See Figure 1 , Figure 2 , Figure 4 This utility model provides a device for threading a leak detection wire inside a multi-layered pipe sleeve. The device includes a pipe fitting 1 and a driving device for moving the pipe fitting 1. The pipe fitting 1 has an internal cavity for threading the wire. This design facilitates the threading of the leak detection wire inside the pipe fitting, avoiding the problem of the leak detection wire breaking due to being dragged directly by a solid pipe fitting. The driving device moves the pipe fitting 1, reducing the labor intensity of workers. A push head 2 is detachably connected to the front end of the pipe fitting 1. The push head 2 is conical, with a hemispherical front end. The conical shape allows the push head 2 to easily advance between adjacent layers of insulation cotton, while the hemispherical shape helps prevent puncture into a single layer of insulation cotton.
[0022] The push head 2 is equipped with a receiving groove 3, which facilitates the storage of the push block 4 and prevents the triangular tip of the push block 4 from puncturing and damaging the insulation cotton. The push block 4 is slidable inside the receiving groove 3. The front end of the push block 4 is triangular, and the tip of the triangular push block 4 can better separate two adjacent layers of insulation cotton. It is only necessary to align the tip with the gap that naturally forms between the two layers of insulation cotton, without the need for workers to separate the two adjacent layers of insulation cotton separately. The push head 2 is equipped with a limiting device to restrict the movement of the push block 4. The limiting device can prevent the push block 4 from retracting into the receiving groove 3 when in use, which is beneficial for limiting the movement of the push block 4.
[0023] See Figure 1 , Figure 2 , Figure 4Furthermore, the limiting device of this utility model includes a limiting pin 6, a pushing block 4 with a limiting hole 10 that cooperates with the limiting pin 6, and a pushing head 2 with a positioning hole that cooperates with the limiting pin 6. Before inserting the pipe 1 into the insulation layer, the pushing block 4 is pushed to a suitable position by hand, and then the limiting pin 6 is inserted into the positioning hole and the limiting hole 10 in sequence to limit the pushing block 4. The driving device drives the pipe 1 forward. After the pushing block 4 and part of the pushing head 2 enter between two adjacent layers of insulation, the driving device is turned off, the limiting pin 6 is pulled out and removed, and the driving device is restarted to insert the pipe 1 into the insulation layer.
[0024] The push block 4 is fixedly connected to the push rod 5. Several elastic elements 8 are set inside the receiving groove 3. The elastic elements 8 are springs. One end of the elastic element 8 is fixedly connected to the push rod 5, and the other end of the elastic element 8 is fixedly connected to the push head 2. The push rod 5 allows the worker to push the push block 4 to a designated position and then limit the push block 4. The elastic elements 8 allow the push block 4 to actively retract into the receiving groove 3, avoiding incomplete retraction of the push block 4. The push block 4 moves in a straight line within the receiving groove 3 and will not detach from the receiving groove 3.
[0025] See Figures 1-4 Furthermore, the push head 2 of this utility model is fixedly connected to several buckles 7. The buckles 7 themselves are elastic. The front end of the pipe fitting 1 is provided with a buckle groove 9 that cooperates with the buckles 7. The cooperation between the buckles 7 and the buckle groove 9 makes it easy for workers to disassemble the push head 2. The buckle groove 9 is used to limit the buckles 7 while also accommodating the buckle arms of the buckles 7, preventing the buckle arms from protruding outside the pipe fitting 1. The driving device is an electric push rod (not shown in the figure). The electric push rod can push the pipe fitting 1 forward, reducing the labor intensity of workers. The buckles 7 are evenly distributed circumferentially. The push head 2 is fixedly connected to a reinforcing rod 11 that cooperates with the inner wall of the pipe fitting 1. The reinforcing rod 11 can be inserted into the pipe fitting 1. The cooperation between the reinforcing rod 11 and the inner wall of the pipe fitting 1 can prevent the buckles 7 from being over-stressed and detaching from the buckle groove 9 when the push head 2 is subjected to an upward force, and at the same time, it helps to prevent the buckles 7 from breaking.
[0026] In summary, this utility model provides a device for threading a leak detection line inside a multi-layered pipe sleeve, including a pipe fitting and a driving device for moving the pipe fitting. The pipe fitting facilitates the threading of the leak detection line inside, preventing the line from breaking inside the insulation layer due to dragging. The driving device provides the power to move the pipe fitting, reducing the labor intensity of workers. One end of the pipe fitting is detachably connected to a push head, which is conical in shape with a hemispherical front end. The conical push head can easily separate adjacent layers of insulation when it advances within the insulation layer, while the hemispherical front end prevents puncture into a single layer of insulation. This helps to avoid increasing the resistance of the propulsion head. The propulsion head is equipped with a receiving groove, and a sliding push block is installed in the receiving groove. The front end of the push block is triangular. The receiving groove can easily accommodate the push block and prevent the front end of the push block from puncturing the single layer of insulation cotton when it moves in the insulation cotton layer. The triangular front end of the push block can better insert into the gap between two adjacent layers of insulation cotton, without the need for workers to separate two adjacent layers of insulation cotton in advance. The propulsion head is equipped with a limiting device to restrict the movement of the push block. The limiting device can restrict the movement of the push block and prevent the push block from being pushed into the receiving groove when it just comes into contact with the insulation cotton layer.
[0027] Of course, there may be other embodiments of this utility model. Without departing from the spirit and essence of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, but these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model.
Claims
1. A wire threading device for internal inspection of multi-layer tubing, characterized in that, It includes a pipe fitting and a drive device for moving the pipe fitting, wherein one end of the pipe fitting is detachably connected to a push head, and the front end of the push head is hemispherical; The propulsion head is provided with a receiving groove, and a slidable push block is elastically connected in the receiving groove. The propulsion head is provided with a limiting device to restrict the movement of the push block.
2. The multi-layer tubing internal inspection wire threading device according to claim 1, characterized in that, The limiting device includes a limiting pin, the push block is provided with a limiting hole that cooperates with the limiting pin, and the push head is provided with a positioning hole that cooperates with the limiting pin.
3. The multi-layer tubing internal inspection wire threading device according to claim 2, characterized in that, The push block is fixedly connected to the push rod, and a number of elastic elements are provided inside the receiving groove. One end of each elastic element is fixedly connected to the push rod, and the other end of each elastic element is fixedly connected to the push head.
4. The multi-layer tubing internal inspection wire threading device according to claim 1, characterized in that, The push head is fixedly connected to several buckles, and the front end of the pipe fitting is provided with a buckle groove that cooperates with the buckles.
5. The multi-layer tubing internal inspection wire threading device according to claim 1, characterized in that, The driving device is an electric push rod.
6. The multi-layer tubing internal inspection wire threading device according to claim 1, characterized in that, The tube has an internal cavity for threading, and a reinforcing rod that fits into the inner wall of the tube is fixedly connected to the push head.
7. The multi-layer tubing internal inspection wire threading device according to claim 1, characterized in that, The propulsion head is conical, and the front end of the push block is triangular.