Torsion-resistant limiting bellow expansion joint

Abstract

The utility model relates to the technical field of corrugated expansion joints, in particular to a torsion-resistant limiting corrugated expansion joint which comprises a connecting flange, a corrugated pipe is fixedly connected to one side of the connecting flange, a protruding block is fixedly connected to the edge of the connecting flange, a connecting rod is inserted into the protruding block, and the connecting rod is fixedly connected with the connecting flange. Threads are arranged at the left end and the right end of the connecting rod, the outer surfaces of the threads are in threaded connection with positioning nuts, and a positioning hole is formed in the side, close to the threads, of the connecting rod. The positioning ring has the advantages that the positioning ring can be connected to the position of the positioning hole in the connecting rod in a sleeved mode, the positioning ring can be rapidly connected with the connecting rod through the positioning screw, the installation speed of the positioning ring is effectively improved, the positioning ring is installed more rapidly and conveniently compared with a positioning nut in traditional threaded connection, and the purpose that the positioning ring is convenient to install and detach is achieved; the three connecting rods can be connected through the reinforcing plates, the torsional strength of the corrugated pipe can be improved, and the situation that the connecting rods deform due to torsion of the corrugated pipe is avoided.

Description

Technical Field

[0001] This utility model relates to the field of corrugated expansion joint technology, and in particular to a corrugated expansion joint with torsional limiting function. Background Technology

[0002] Corrugated expansion joints are expansion joints that rely on bellows to achieve expansion and contraction. The function and strength design of corrugated expansion joints mainly depend on the design of the bellows. Different designs and combinations of bellows can stretch, compress, or bend the bellows, thus forming three basic types of corrugated expansion joints: axial, transverse, and angular.

[0003] A corrugated expansion joint is disclosed in Chinese Patent CN214368512U. Research on existing technology and the aforementioned patent reveals that most existing corrugated expansion joints use a limiting device consisting of a screw and a nut. While this limiting device prevents excessive stretching and compression of the corrugated pipe, and the nuts at both ends are easy to install, the two internal nuts require many rotations due to distance, significantly increasing installation speed and making it time-consuming and labor-intensive. Therefore, this utility model proposes a corrugated expansion joint with anti-torsional limiting capability. Utility Model Content

[0004] The purpose of this invention is to at least solve one of the aforementioned technical defects.

[0005] The purpose of this invention is to overcome the shortcomings of the prior art, solve the problems mentioned in the background art, and provide a corrugated expansion joint with torsion resistance and limiting.

[0006] The purpose of this utility model is achieved through the following technical solution: a corrugated expansion joint with anti-torsion limiting, including a connecting flange, a bellows fixedly connected to one side of the connecting flange, a protrusion fixedly connected to the edge of the connecting flange, a connecting rod inserted into the inside of the protrusion, threads on both the left and right ends of the connecting rod, a positioning nut threadedly connected to the outer surface of the threads, a positioning hole on the side of the connecting rod near the threads, a positioning ring sleeved on the outer surface of the connecting rod near the positioning hole, a flat surface on one side of the positioning ring, a threaded hole inside the positioning ring, and a positioning screw threadedly connected to the inside of the threaded hole;

[0007] A reinforcing plate is snapped into the middle of the connecting rod. The reinforcing plate has slots at both ends. A connecting plate is fixedly connected to the side of the reinforcing plate near the slots. A connecting screw is threaded into the inside of the connecting plate.

[0008] Preferably, there are two connecting flanges, which are welded to the left and right sides of the bellows respectively. A sleeve is welded to one side of the inside of the bellows, and the outer diameter of the sleeve is adapted to the inner diameter of the bellows.

[0009] By adopting the above technical solution, the other end of the sleeve is not welded to the bellows, so that the installation of the sleeve does not affect the expansion and contraction of the bellows. The water inlet end of the sleeve is welded to the bellows, so that the installation of the sleeve can prevent debris from entering the interior of the bellows.

[0010] Preferably, the protrusion is an isosceles trapezoidal plate, and there are three protrusions. The three protrusions are welded in a circumferential array to the edge of the connecting flange. A circular hole is opened inside the protrusion, and the inner diameter of the circular hole is adapted to the diameter of the connecting rod.

[0011] By adopting the above technical solution, the connecting rod can connect the two connecting flanges. The positioning nut and positioning ring on the connecting rod can limit the expansion and contraction length of the bellows, thus preventing the bellows from being damaged due to excessive expansion and contraction.

[0012] Preferably, the inner diameter of the positioning ring is adapted to the diameter of the connecting rod, the diameter of the positioning hole is adapted to the diameter of the positioning screw, and the positioning screw is threadedly connected to the center of the positioning ring near the plane.

[0013] By adopting the above technical solution, the positioning ring can be quickly connected to the connecting rod via positioning screws.

[0014] Preferably, the reinforcing plate is an arc-shaped plate, and there are three reinforcing plates. The slot is a semi-circular slot, and the diameter of the slot is adapted to the diameter of the connecting rod. The left and right ends of the reinforcing plate are respectively engaged with the outer surfaces of the two connecting rods.

[0015] By adopting the above technical solution, the reinforcing plate can connect the three connecting rods, which can increase the torsional strength of the corrugated pipe and prevent the connecting rods from deforming due to the torsion of the corrugated pipe.

[0016] Preferably, the connecting plate is a rectangular plate, which is welded to the top side of the reinforcing plate near the slot. A through hole is provided in the center of the connecting plate, and a connecting nut is threaded to one end of the connecting screw.

[0017] By adopting the above technical solution, the connecting screws and connecting nuts can connect the three reinforcing plates into one unit.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] 1. This anti-torsion and limiting corrugated expansion joint features a positioning ring. Both ends of the connecting rod are threaded, and a positioning nut is threaded onto the outer surface of the thread. A positioning hole is provided on the side of the connecting rod near the thread, and a positioning ring is fitted onto the outer surface of the connecting rod near the positioning hole. In use, the positioning ring can be fitted onto the positioning hole on the connecting rod. The positioning ring can be quickly connected to the connecting rod via a positioning screw, effectively improving the installation speed of the positioning ring. The positioning ring is faster and more convenient to install than the traditional threaded positioning nut, thus facilitating the installation and removal of the positioning ring.

[0020] 2. This torsion-resistant and limiting corrugated expansion joint features reinforcing plates. A reinforcing plate is snapped into the middle of the connecting rod, and slots are provided at both ends of the reinforcing plate. A connecting plate is fixedly connected to the side of the reinforcing plate closest to the slots. Connecting screws are threaded into the internal parts of the connecting plate, allowing the three reinforcing plates to be snapped onto the outer surface of the connecting rod. The connecting screws and nuts connect the three reinforcing plates into one unit. The reinforcing plates connect the three connecting rods, increasing the torsion resistance of the corrugated pipe and preventing deformation of the connecting rods due to the torsion of the corrugated pipe. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the connecting rod of this utility model;

[0023] Figure 3 This is a schematic diagram of the positioning ring of this utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the reinforcing plate of this utility model.

[0025] In the diagram: 1-Connecting flange, 2-Bellows, 3-Protrusion, 4-Connecting rod, 5-Thread, 6-Locking hole, 7-Locking ring, 8-Flat surface, 9-Threaded hole, 10-Locking screw, 11-Reinforcing plate, 12-Slot, 13-Connecting plate, 14-Connecting screw, 15-Sleeve, 16-Locking nut, 17-Connecting nut. Detailed Implementation

[0026] Additional aspects and advantages of this invention will be further set forth in the description which follows in conjunction with the accompanying drawings, and in part will be obvious from the description or may be learned by practice of the invention.

[0027] like Figure 1-3As shown, a torsion-resistant and limiting corrugated expansion joint includes a connecting flange 1, a bellows 2 welded to one side of the connecting flange 1, a protrusion 3 welded to the edge of the connecting flange 1, a connecting rod 4 inserted into the protrusion 3, threads 5 on both the left and right ends of the connecting rod 4, a positioning nut 16 threadedly connected to the outer surface of the thread 5, a positioning hole 6 on the side of the connecting rod 4 near the thread 5, a positioning ring 7 sleeved on the outer surface of the connecting rod 4 near the positioning hole 6, a flat surface 8 on one side of the positioning ring 7, a threaded hole 9 inside the positioning ring 7, and a positioning screw 10 threadedly connected to the inside of the threaded hole 9.

[0028] With the above settings, when in use, the positioning ring 7 can be sleeved on the positioning hole 6 on the connecting rod 4. The positioning ring 7 can be quickly connected to the connecting rod 4 through the positioning screw 10, which effectively improves the installation speed of the positioning ring 7. The positioning ring is faster and more convenient to install than the positioning nut of the traditional threaded connection, thus achieving the purpose of facilitating the installation and disassembly of the positioning ring 7.

[0029] like Figure 1 and Figure 4 As shown, a reinforcing plate 11 is snapped into the middle of the connecting rod 4. The left and right ends of the reinforcing plate 11 are provided with slots 12. A connecting plate 13 is welded to the side of the reinforcing plate 11 near the slots 12. A connecting screw 14 is threaded into the inside of the connecting plate 13.

[0030] With the above setup, three reinforcing plates 11 can be snapped onto the outer surface of the connecting rod 4. The connecting screw 14 and the connecting nut 17 can connect the three reinforcing plates 11 into one piece. The reinforcing plates 11 can connect the three connecting rods 4 together, which can increase the torsional strength of the bellows 2 and prevent the connecting rod 4 from deforming due to the torsion of the bellows 2.

[0031] As a preferred technical solution of this utility model, there are two connecting flanges 1, which are welded to the left and right sides of the bellows 2 respectively. A sleeve 15 is welded to one side of the inside of the bellows 2, and the outer diameter of the sleeve 15 is matched with the inner diameter of the bellows 2.

[0032] As a preferred technical solution of this utility model, the protrusion 3 is an isosceles trapezoidal plate, and there are three protrusions 3. The three protrusions 3 are welded in a circumferential array to the edge of the connecting flange 1. A circular hole is opened inside the protrusion 3, and the inner diameter of the circular hole is adapted to the diameter of the connecting rod 4.

[0033] As a preferred technical solution of this utility model, the inner diameter of the positioning ring 7 is adapted to the diameter of the connecting rod 4, the diameter of the positioning hole 6 is adapted to the diameter of the positioning screw 10, and the positioning screw 10 is threadedly connected to the center of the positioning ring 7 near the plane 8.

[0034] As a preferred technical solution of this utility model, the reinforcing plate 11 is an arc-shaped plate, and there are three reinforcing plates 11. The slot 12 is a semi-circular slot, and the diameter of the slot 12 is adapted to the diameter of the connecting rod 4. The left and right ends of the reinforcing plate 11 are respectively attached to the outer surfaces of the two connecting rods 4.

[0035] As a preferred technical solution of this utility model, the connecting plate 13 is a rectangular plate. The connecting plate 13 is welded to the top side of the reinforcing plate 11 near the slot 12. A through hole is opened at the center of the connecting plate 13, and a connecting nut 17 is threaded to one end of the connecting screw 14.

[0036] The working process of this utility model is as follows:

[0037] S1. After the connecting rod 4 passes through a protrusion 3, the positioning ring 7 is fitted onto the positioning hole 6 on the connecting rod 4. The positioning ring 7 can be quickly connected to the connecting rod 4 through the positioning screw 10.

[0038] S2. After the two positioning rings 7 are installed, the connecting rod 4 can be passed through another protrusion 3 and threaded to both ends of the connecting rod 4 through two positioning nuts 16.

[0039] S3. The three reinforcing plates 11 are snapped onto the outer surface of the connecting rod 4. The connecting screws 14 and the connecting nuts 17 can connect the three reinforcing plates 11 into a single reinforcing plate 11.

[0040] S4 can connect the three connecting rods 4 together, which can increase the torsional strength of the corrugated pipe 2.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A torsionally limited bellows expansion joint characterized by: The system includes a connecting flange (1), a bellows pipe (2) is fixedly connected to one side of the connecting flange (1), a protrusion (3) is fixedly connected to the edge of the connecting flange (1), a connecting rod (4) is inserted into the protrusion (3), threads (5) are provided at both ends of the connecting rod (4), a positioning nut (16) is threaded to the outer surface of the thread (5), a positioning hole (6) is provided on the side of the connecting rod (4) near the thread (5), a positioning ring (7) is sleeved on the outer surface of the connecting rod (4) near the positioning hole (6), a flat surface (8) is provided on one side of the positioning ring (7), a threaded hole (9) is provided inside the positioning ring (7), and a positioning screw (10) is threaded to the inside of the threaded hole (9). A reinforcing plate (11) is snapped into the middle of the connecting rod (4). The reinforcing plate (11) has slots (12) at both ends. A connecting plate (13) is fixedly connected to the side of the reinforcing plate (11) near the slots (12). A connecting screw (14) is threaded into the inside of the connecting plate (13).

2. The torsion-limiting corrugated expansion joint of claim 1, wherein: There are two connecting flanges (1), which are welded to the left and right sides of the bellows (2) respectively. A sleeve (15) is welded to one side of the inside of the bellows (2), and the outer diameter of the sleeve (15) is adapted to the inner diameter of the bellows (2).

3. The corrugated expansion joint with torsion resistance and limiting according to claim 1, characterized in that: The protrusion (3) is an isosceles trapezoidal plate. There are three protrusions (3). The three protrusions (3) are welded in a circumferential array to the edge of the connecting flange (1). A circular hole is opened inside the protrusion (3). The inner diameter of the circular hole is adapted to the diameter of the connecting rod (4).

4. The torsion-limiting corrugated expansion joint of claim 1, wherein: The inner diameter of the positioning ring (7) is adapted to the diameter of the connecting rod (4), the diameter of the positioning hole (6) is adapted to the diameter of the positioning screw (10), and the positioning screw (10) is threadedly connected to the center of the positioning ring (7) near the plane (8).

5. The torsion-limiting corrugated expansion joint of claim 1, wherein: The reinforcing plate (11) is an arc-shaped plate, and there are three reinforcing plates (11). The slot (12) is a semi-circular slot, and the diameter of the slot (12) is adapted to the diameter of the connecting rod (4). The left and right ends of the reinforcing plate (11) are respectively attached to the outer surfaces of the two connecting rods (4).

6. The torsion-limiting corrugated expansion joint of claim 1, wherein: The connecting plate (13) is a rectangular plate. The connecting plate (13) is welded to the top side of the reinforcing plate (11) near the slot (12). A through hole is provided at the center of the connecting plate (13).

7. The torsion-limiting corrugated expansion joint of claim 1, wherein: One end of the connecting screw (14) is threaded with a connecting nut (17).

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