Anti-clamping half-tooth casing pipe

Abstract

The utility model discloses an anti-clamping half-tooth casing pipe, which belongs to the field of hardware fitting equipment and comprises an inner pipe, one side of the inner pipe is in threaded connection with a half-tooth part of a first casing pipe and extends into a second casing pipe, the second casing pipe is mounted on one side of the first casing pipe, and a third casing pipe is mounted on the right side of the second casing pipe. Two arc-shaped threaded rods are symmetrically arranged on the inner wall of the second sleeve, the first sleeve, the second sleeve and the third sleeve can be directly and rapidly detached and separated by adopting a movably-arranged combined sleeve structure, the situation that the maintenance work is affected due to the fact that an inner pipe is clamped is avoided, and the maintenance efficiency is improved due to the fact that a rotating structure is adopted to be matched with the arc-shaped threaded rods. When the inner pipe is taken out, the second sleeve can be directly rotated, so that friction is generated between the two arc-shaped threaded rods and threads of the inner pipe, the effect of removing internal rust is achieved, and the inner pipe is prevented from being clamped by the rusted part to be taken out.

Description

Technical Field

[0001] The utility model relates to the field of hardware fitting equipment, in particular to an anti-jamming semi-threaded sleeve. Background Art

[0002] A sleeve is an insulating device for introducing a live conductor into an electrical equipment or passing through a wall. The former is called an electrical sleeve, and the latter is called a wall-piercing sleeve. Sleeves are usually used in the basement of a building and are iron rings used to protect pipes or facilitate pipe installation. The sleeves are classified into rigid sleeves, flexible waterproof sleeves, steel pipe sleeves, iron sheet sleeves, etc. Among them, most of the steel pipe sleeves adopt semi-threaded sleeves.

[0003] At present, there are certain problems in the use of semi-threaded sleeves on the market. Since the part of the inner pipe passing through the semi-threads is not in close fit with the threads and is exposed to the air for a long time, it is easily rusted, so that the threaded part of the thread no longer matches the threaded part of the sleeve. When the inner pipe needs to be pulled out for maintenance, the inner pipe is likely to be stuck in the outer pipe and cannot be taken out smoothly, thus making it impossible to carry out the maintenance work. Content of the Utility Model

[0004] The main purpose of the utility model is to provide an anti-jamming semi-threaded sleeve, which can effectively solve the problems mentioned in the background art.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] An anti-jamming semi-threaded sleeve includes an inner pipe. One side of the inner pipe is threadedly connected to the semi-threaded part of a first sleeve and extends into a second sleeve. A second sleeve is movably installed on one side of the first sleeve, and a third sleeve is movably installed on the right side of the second sleeve. Two arc-shaped tooth strips are symmetrically arranged on the inner wall of the second sleeve.

[0007] Preferably, annular sliding grooves are formed in the two side pipe bodies of the second sleeve. Two symmetrically arranged sliding pieces are installed on the right side of the first sleeve. The first sleeve is slidably connected to the annular sliding groove of the second sleeve through the sliding pieces. Two symmetrically arranged sliding pieces are installed on the left side of the third sleeve. The third sleeve is slidably connected to the annular sliding groove of the second sleeve through the sliding pieces.

[0008] Preferably, four connecting locks are installed on the second sleeve. The four connecting locks are distributed at the joints of the four sliding pieces and the sliding grooves. Each connecting lock includes a lock seat. A pin penetrates through the middle of the lock seat. One end of the pin extends into the second sleeve and penetrates through the sliding piece. The bottom end of the pin is a soft part.

[0009] Preferably, a meshing cavity is formed in the middle of the lock seat. Two inserting blocks are meshed in the meshing cavity. Grooves adapted to the pin are formed in the middle of the two inserting blocks.

[0010] Preferably, the inner walls of the first sleeve and the third sleeve are also provided with arc-shaped tooth strips, and the arc-shaped tooth strips in the second sleeve and the arc-shaped tooth strips on the inner wall of the sleeve are arranged in a surrounding manner.

[0011] Preferably, the arc-shaped tooth strips in the first sleeve and the arc-shaped tooth strips in the third sleeve are of the same type. The end of the arc-shaped tooth strip is a soft strip, and the end of the arc-shaped tooth strip of the second sleeve is a scraping strip, and both sides of the arc-shaped tooth strip are friction plates.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] In the anti-jamming semi-tooth sleeve of the utility model, by adopting a combined sleeve structure arranged movably, the first sleeve, the second sleeve and the third sleeve can be directly and quickly disassembled and separated, avoiding the influence of the inner tube being jammed on the maintenance work. And because a rotating structure is adopted in cooperation with the arc-shaped tooth strips, the second sleeve can be directly rotated, so that the two arc-shaped tooth strips generate friction with the threads of the inner tube, realizing the function of removing rust inside, thereby avoiding the rusted part from jamming the removal of the inner tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 is a schematic diagram of the overall structure of the utility model;

[0016] Figure 3 is an exploded schematic diagram of the overall structure of the utility model;

[0017] Figure 4 is an exploded schematic diagram of the connection lock of the utility model;

[0018] Figure 5 is a schematic diagram of the arc-shaped tooth strip structure of the utility model;

[0019] Figure 6 is a schematic diagram of the arc-shaped tooth strip structure of the utility model.

[0020] In the figure: 1, inner tube; 2, first sleeve; 3, second sleeve; 4, arc-shaped tooth strip; 41, friction plate; 42, scraping strip; 43, soft strip; 5, third sleeve; 6, connection lock; 61, pin; 62, groove; 63, lock seat; 64, meshing cavity; 65, insertion block; 7, sliding piece; 8, semi-tooth part. DETAILED DESCRIPTION OF THE INVENTION

[0021] In order to make the technical means, creative features, achieving purposes and functions of the utility model easy to understand, the utility model will be further described below in conjunction with specific embodiments.

[0022] As shown Figure 1-3 in the figure, an anti-jamming semi-threaded casing includes an inner tube 1. One side of the inner tube 1 is threadedly connected to the semi-threaded part 8 of the first casing 2 and extends into the second casing 3. One side of the first casing 2 is movably installed with the second casing 3. The right side of the second casing 3 is movably installed with the third casing 5. Two arc-shaped tooth strips 4 are symmetrically arranged on the inner wall of the second casing 3. By adopting a combined casing structure with movable settings, the first casing 2, the second casing 3 and the third casing 5 can be directly and quickly disassembled and separated, avoiding the inner tube 1 being jammed and affecting the maintenance work. And because a rotating structure is adopted in cooperation with the arc-shaped tooth strips 4, the second casing 3 can be directly rotated, so that the two arc-shaped tooth strips 4 generate friction with the threads of the inner tube 1, realizing the function of removing rust inside, thus avoiding the rusted part from jamming the removal of the inner tube 1.

[0023] As shown Figure 1-4 in the figure, annular sliding grooves are opened in the tube bodies on both sides of the second casing 3. Two symmetric sliding pieces 7 are installed on the right side of the first casing 2. The first casing 2 is slidably connected to the annular sliding groove of the second casing 3 through the sliding pieces 7. Two symmetric sliding pieces 7 are installed on the left side of the third casing 5. The third casing 5 is slidably connected to the annular sliding groove of the second casing 3 through the sliding pieces 7. Through the arranged annular sliding grooves and sliding pieces 7, simple disassembly between the three casings is realized.

[0024] Furthermore, four connecting locks 6 are installed on the second casing 3. The four connecting locks 6 are distributed at the joints of the four sliding pieces 7 and the sliding grooves. The connecting lock 6 includes a lock seat 63. A pin 61 passes through the middle of the lock seat 63. One end of the pin 61 extends into the second casing 3 and passes through the sliding piece 7. The bottom end of the pin 61 is a soft part. By adopting the structure of the connecting lock 6, the three different casings can be locked to keep them stable, and with a simple structure, while ensuring stability, it also facilitates quick disassembly.

[0025] Furthermore, a meshing cavity 64 is opened in the middle of the lock seat 63. Two plug blocks 65 are meshed in the meshing cavity 64. Grooves 62 adapted to the pin 61 are opened in the middle of the two plug blocks 65. Relying on the plug blocks 65, the pin 61 can be fixed.

[0026] As shown Figure 1 、 Figure 5 、 Figure 6 in the figure, specifically:

[0027] Arc-shaped tooth strips 4 are also arranged on the inner walls of the first casing 2 and the third casing 5. The arc-shaped tooth strips 4 in the second casing 3 and the arc-shaped tooth strips 4 on the inner walls of the first casing 2 and the third casing 5 are all arranged in a surrounding manner on the inner walls of the casings. By adopting arc-shaped tooth strips 4 at different positions and the arc-shaped tooth strips 4 not being in the same horizontal space, rust cleaning from multiple angles is realized.

[0028] Further, the arc-shaped tooth strips 4 in the first sleeve 2 and the arc-shaped tooth strips 4 in the third sleeve 5 are of the same type. The end of the arc-shaped tooth strip 4 is a soft strip 43, and the end of the arc-shaped tooth strip 4 in the second sleeve 3 is a scraping strip 42. The two sides of the arc-shaped tooth strip 4 are friction plates 41. By using two types of arc-shaped tooth strips 4, different functions can be achieved. The arc-shaped tooth strip 4 in the second sleeve 3 can effectively remove rust relying on the friction plates 41 and the scraping strip 42, while the arc-shaped tooth strips 4 in the first sleeve 2 and the third sleeve 5 adopt soft strips 43, which can assist in wiping off the rust on the threads of the inner tube 1.

[0029] In actual use, by pulling apart the two insertion blocks 65, the two mutually magnetically attracted insertion blocks 65 are separated, thereby pulling out the bolt 61, so that the bolt 61 no longer abuts against the inner tube 1. Then, the second sleeve 3 is rotated, so that the second sleeve 3 rotates, and thus the arc-shaped tooth strip 4 starts to rotate around the threads of the inner tube 1. Then, the scraping strip 42 and the friction plates 41 start to rub against the threads of the inner tube 1, thereby wiping off the rust and dirt generated on the threads of the inner tube 1 and preventing the inner tube 1 from getting stuck during the process of pulling out the inner tube 1.

[0030] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-stuck semi-threaded cannula, comprising an inner tube (1), characterized in that: One side of the inner tube (1) is threadedly connected to a half threaded portion (8) of the first sleeve (2) and extends into the second sleeve (3); the second sleeve (3) is movably mounted on one side of the first sleeve (2); a third sleeve (5) is movably mounted on the right side of the second sleeve (3); and two arc-shaped threaded bars (4) are symmetrically arranged on the inner wall of the second sleeve (3).

2. The anti-stuck half-thread sleeve according to claim 1, characterized in that: Annular sliding grooves are provided in the tube bodies on both sides of the second sleeve (3); two symmetrical sliding plates (7) are installed on the right side of the first sleeve (2); the first sleeve (2) is slidably connected to the annular sliding grooves of the second sleeve (3) via the sliding plates (7); two symmetrical sliding plates (7) are installed on the left side of the third sleeve (5); the third sleeve (5) is slidably connected to the annular sliding grooves of the second sleeve (3) via the sliding plates (7).

3. The anti-stuck half-thread sleeve according to claim 2, characterized in that: Four connecting locks (6) are installed on the second sleeve (3), and the four connecting locks (6) are distributed at the connection points between the four slides (7) and the slide grooves. The connecting lock (6) comprises a lock seat (63), and a latch (61) penetrates the middle of the lock seat (63). One end of the latch (61) extends into the second sleeve (3) and penetrates the slide (7). The bottom end of the latch (61) is a soft part.

4. The anti-stuck half-thread sleeve according to claim 3, characterized in that: An engagement cavity (64) is provided in the middle of the lock seat (63), two plug blocks (65) are engaged in the engagement cavity (64), and grooves (62) matching the latch pin (61) are provided in the middle of the two plug blocks (65).

5. The anti-stuck half-thread sleeve according to claim 1, characterized in that: The inner walls of the first sleeve (2) and the third sleeve (5) are also provided with arc-shaped tooth bars (4), and the arc-shaped tooth bars (4) and the arc-shaped tooth bars (4) in the second sleeve (3) are both arranged on the inner walls of the sleeves in a circumferential manner.

6. The anti-stuck half-thread sleeve according to claim 5, characterized in that: The arc-shaped tooth bar (4) in the first sleeve (2) and the arc-shaped tooth bar (4) in the third sleeve (5) are the same type of tooth bars, the end of the arc-shaped tooth bar (4) is a soft bar (43), the end of the arc-shaped tooth bar (4) in the second sleeve (3) is a scraping bar (42), and both sides of the arc-shaped tooth bar (4) are friction plates (41).

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