Bolt type anti-falling device for corrugated pipe

Abstract

The utility model relates to the technical field of corrugated pipe connection, and aims at solving the problems that an existing corrugated pipe connection structure is poor in limiting effect and still prone to falling off when axial tension exists. The utility model provides a plug pin type anti-falling device for corrugated pipes. The plug pin type anti-falling device comprises a first corrugated pipe, a second adapting pipe, a plug pin assembly and a limiting assembly. The limiting assembly comprises a cylinder body and an L-shaped annular plate; the L-shaped annular plate is externally arranged on the outer side of the cylinder body; an annular space is reserved between the cylinder body and the L-shaped annular plate; the first corrugated pipe is embedded into the socket end of the second adapting pipe; the socket end of the second socket pipe is embedded into the annular space; the plug pin assembly penetrates into the second adapting pipe and the first corrugated pipe from the L-shaped annular plate and sequentially penetrates through the second adapting pipe and the first corrugated pipe. According to the utility model, the stability after the first corrugated pipe and the second adapting pipe are connected can be effectively ensured, and the first corrugated pipe and the second adapting pipe are prevented from falling off in the process of generating axial tension.

Description

Technical Field

[0001] The utility model relates to the technical field of bellows connection, in particular to a latch-type anti-dropping device for bellows. Background Art

[0002] A bellows is a tubular elastic sensitive element formed by connecting foldable corrugated sheets along the folding and stretching direction. When working, it stretches along the length of the tube under the action of internal pressure, causing the movable end to produce a displacement that is related to the pressure. However, when the bellows is in use, or in special circumstances caused by natural disasters such as crushing and dislocation, its connection often deviates and is damaged, resulting in leakage.

[0003] In the prior art, bellows are connected by inserting the bellows into the bellows, and a sealing ring is further arranged between the bellows to enhance the sealing effect; for example, the double-walled bellows disclosed in the patent with the announcement number CN213900256U, specifically, the socket of the second bellows is inserted into the socket of the first bellows by external force, and a clamping block is further arranged, and the elastic clamping block is clamped between the corrugated strips for reinforcement;

[0004] However, although the elastic clamping block is convenient for adjusting the clamping position and for disassembly and assembly, its limiting and fixing effect is still limited. When there is axial tension, the connection is still easy to fall off.

[0005] Based on the above description, there is an urgent need for a latch-type anti-falling device for a corrugated pipe with good limiting effect and high stability. Utility Model Content

[0006] The utility model aims to provide a latch-type anti-dropping device for a bellows, aiming to solve the technical problem that the existing bellows connection structure has poor limiting effect and is still easy to drop out when there is axial tension.

[0007] The embodiments of the present invention are implemented by the following technical solutions:

[0008] A latch-type anti-dropping device for a corrugated pipe comprises a first corrugated pipe, a second connecting pipe, a latch assembly and a limit assembly; the limit assembly comprises a cylinder and an L-shaped ring plate; the L-shaped ring plate is arranged on the outside of the cylinder; an annular gap is left between the cylinder and the L-shaped ring plate; the first corrugated pipe is embedded in the socket end of the second connecting pipe; the socket end of the second connecting pipe is embedded in the annular gap; the latch assembly penetrates from the L-shaped ring plate and passes through the second connecting pipe and the first corrugated pipe in sequence.

[0009] Preferably, the latch assembly comprises a plurality of first limiting pins; the plurality of first limiting pins penetrate into the L-shaped ring plate at intervals along the circumferential direction and pass through the second receiving tube and the first corrugated tube in sequence.

[0010] Preferably, the insertion end of the first limiting pin extends toward the center of the L-shaped ring plate.

[0011] Preferably, the latch assembly also includes a plurality of second limit pins; the plurality of second limit pins are inserted into the L-shaped ring plate at intervals along the circumferential direction and pass through the second receiving tube and the first corrugated tube in sequence; the second limit pin is inserted into the L-shaped ring plate at an angle to the first limit pin.

[0012] Preferably, the second limiting pin and the first limiting pin are staggered and penetrated through the L-shaped ring plate.

[0013] Preferably, a puncture pad is provided on a side of the cylinder away from the L-shaped ring plate and extends toward the corrugated groove of the first corrugated tube; the first limiting pin and the second limiting pin both pass through the puncture pad.

[0014] Preferably, one end of the second receiving tube embedded in the annular gap is provided with a plurality of wide-pitch trough grooves; the first limit pin and the second limit pin are inclined to pass through the groove cavities of the L-shaped ring plate and the wide-pitch trough grooves in sequence.

[0015] The technical solution of the embodiment of the utility model has at least the following advantages and beneficial effects:

[0016] The utility model is implemented by sleeved a cylinder body on the end of the first bellows, then the end is passed through the tube cavity of the second receiving tube, then the cylinder body is pushed and clamped between the first bellows and the second receiving tube, at the same time, the second receiving tube is passed through the annular gap between the cylinder body and the L-shaped ring plate, and then the first bellows, the second receiving tube and the limit assembly are further connected as a whole by inserting a latch assembly, which can effectively ensure the stability of the first bellows and the second receiving tube after being connected and avoid falling off in the process of generating axial tension, and can also reduce the situation in which the insertion connection is directly inserted by the latch assembly and the tearing damage is caused to the insertion connection during the pulling process of the tube body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is the front view of the utility model;

[0019] Figure 2 for Figure 1 A cross-sectional view of

[0020] Figure 3 for Figure 2 An enlarged schematic diagram of the local structure A;

[0021] Figure 4 It is a first side sectional view of the utility model;

[0022] Figure 5 It is a second side sectional view of the utility model;

[0023] Figure 6 for Figure 4 Schematic diagram of the second state.

[0024] Icons: 1-first bellows, 2-second receiving tube, 21-wide-spaced trough groove, 3-pin assembly, 31-first limiting pin, 32-second limiting pin, 4-limiting assembly, 41-cylinder, 42-L-shaped ring plate, 5-puncture pad. DETAILED DESCRIPTION

[0025] Example 1

[0026] See also Figures 1 to 6 The utility model provides the following technical solutions: a latch-type anti-dropping device for a corrugated pipe, which is suitable for the situation of corrugated pipe connection.

[0027] Specifically, Figures 1 to 4 As shown, a latch type anti-dropping device for a bellows comprises a first bellows 1, a second receiving tube 2, a latch assembly 3 and a limit assembly 4; the limit assembly 4 comprises a cylinder 41 and an L-shaped ring plate 42; the L-shaped ring plate 42 is externally arranged on the outer side of the cylinder 41; an annular gap is left between the cylinder 41 and the L-shaped ring plate 42; the first bellows 1 is embedded in the socket end of the second receiving tube 2; the socket end of the second receiving tube 2 is embedded in the annular gap; the latch assembly 3 penetrates from the L-shaped ring plate 42 and passes through the second receiving tube 2 and the first bellows 1 in sequence.

[0028] In this embodiment, the cylinder 41 is firstly put on the end of the first bellows 1, and then the end is inserted into the inner cavity of the second receiving tube 2, and then the cylinder 41 is pushed and clamped between the first bellows 1 and the second receiving tube 2. At the same time, the second receiving tube 2 is inserted into the annular gap between the cylinder 41 and the L-shaped ring plate 42, and then the first bellows 1, the second receiving tube 2, and the limit assembly 4 are further connected as a whole by inserting the latch assembly 3, which can effectively ensure the stability of the first bellows 1 and the second receiving tube 2 after connection and avoid falling off during the process of generating axial tension, and can also reduce the situation where the insertion connection is directly inserted by the latch assembly 3, which may cause tearing damage to the insertion connection during the pulling process of the tube body.

[0029] Specifically, Figures 1 to 6As shown, the latch assembly 3 includes a plurality of first limiting pins 31 ; the plurality of first limiting pins 31 penetrate into the L-shaped ring plate 42 at intervals along the circumferential direction and pass through the second receiving tube 2 and the first corrugated tube 1 in sequence.

[0030] The insertion end of the first limiting pin 31 extends toward the center of the L-shaped ring plate 42 (see FIG. Figure 6 shown).

[0031] Specifically, Figures 1 to 6 As shown, the latch assembly 3 further includes a plurality of second limiting pins 32; the plurality of second limiting pins 32 are inserted into the L-shaped ring plate 42 at intervals along the circumferential direction and sequentially pass through the second receiving tube 2 and the first corrugated tube 1; the second limiting pins 32 are inserted into the L-shaped ring plate 42 at an angle with the first limiting pin 31. The second limiting pins 32 and the first limiting pins 31 are inserted into the L-shaped ring plate 42 in a staggered manner.

[0032] In this embodiment, the first limiting pin 31 can also be arranged obliquely and cooperate with the second limiting pin 32, so as to form a reaction force to overcome the bidirectional pulling at the connection between the first corrugated pipe 1 and the second receiving pipe 2, thereby fully ensuring that the connection is not easy to fall off regardless of the axial pulling force in which direction, and avoiding the risk of misalignment and breakage of the limiting pins in the same direction during the reciprocating pulling process;

[0033] Furthermore, by staggering and obliquely interlacing the second limit pin 32 and the first limit pin 31, it is possible to avoid tearing of the interlacing point caused by the second limit pin 32 and the first limit pin 31 being too close; wherein the horizontal angle between the second limit pin 32 and the first limit pin 31 is an acute angle.

[0034] Specifically, Figures 1 to 6 As shown, a puncture pad 5 is provided on one side of the cylinder 41 away from the L-shaped ring plate 42 and extending toward the corrugated groove of the first corrugated tube 1 ; both the first limiting pin 31 and the second limiting pin 32 pass through the puncture pad 5 .

[0035] In this embodiment, the puncture pad 5 is made of elastic silicone material, which is convenient for puncture and disassembly, and has a certain sealing performance.

[0036] Specifically, Figures 1 to 6 As shown, one end of the second receiving pipe 2 embedded in the annular gap is provided with a plurality of wide-pitch trough grooves 21; the first limiting pin 31 and the second limiting pin 32 are inclined to pass through the L-shaped ring plate 42 and the groove cavity of the wide-pitch trough groove 21 in sequence.

[0037] In this embodiment, the wide-pitch trough groove 21 is used to facilitate the rapid installation of the first limiting pin 31 and the second limiting pin 32. During the pulling process of the pipe section, the groove wall of the wide-pitch trough groove 21 can also buffer and limit it.

[0038] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A bolt-type anti-dropping device for a corrugated pipe, comprising a first corrugated pipe (1) and a second receiving pipe (2), characterized in that: It also comprises a latch assembly (3) and a limit assembly (4); the limit assembly (4) comprises a cylinder (41) and an L-shaped ring plate (42); the L-shaped ring plate (42) is arranged outside the cylinder (41); an annular gap is left between the cylinder (41) and the L-shaped ring plate (42); the first bellows (1) is embedded in the socket end of the second socket tube (2); the socket end of the second socket tube (2) is embedded in the annular gap; the latch assembly (3) penetrates from the L-shaped ring plate (42) and passes through the second socket tube (2) and the first bellows (1) in sequence.

2. The latch-type anti-dropping device for a corrugated pipe according to claim 1, characterized in that: The latch assembly (3) comprises a plurality of first limiting pins (31); the plurality of first limiting pins (31) penetrate the L-shaped ring plate (42) at intervals along the circumferential direction and pass through the second receiving tube (2) and the first corrugated tube (1) in sequence.

3. The latch-type anti-dropping device for a corrugated pipe according to claim 2, characterized in that: The insertion end of the first limiting pin (31) extends towards the center of the L-shaped ring plate (42).

4. The latch-type anti-dropping device for a corrugated pipe according to claim 2, characterized in that: The latch assembly (3) further comprises a plurality of second limit pins (32); the plurality of second limit pins (32) are inserted into the L-shaped ring plate (42) at intervals along the circumferential direction and pass through the second receiving tube (2) and the first corrugated tube (1) in sequence; the second limit pin (32) is inserted into the L-shaped ring plate (42) at an angle with the first limit pin (31).

5. The latch-type anti-dropping device for a corrugated pipe according to claim 4, characterized in that: The second limiting pin (32) and the first limiting pin (31) are staggered and penetrate the L-shaped ring plate (42).

6. The latch-type anti-dropping device for a corrugated pipe according to claim 5, characterized in that: A puncture pad (5) is provided on the side of the cylinder (41) away from the L-shaped ring plate (42) and extending toward the corrugated groove of the first corrugated tube (1); the first limiting pin (31) and the second limiting pin (32) both pass through the puncture pad (5).

7. The latch-type anti-dropping device for a corrugated pipe according to any one of claims 4 to 6, characterized in that: One end of the second receiving pipe (2) embedded in the annular gap is provided with a plurality of wide-pitch trough grooves (21); the first limiting pin (31) and the second limiting pin (32) are both inclined to pass through the L-shaped ring plate (42) and the groove cavity of the wide-pitch trough groove (21) in sequence.

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