A rapid connecting device for subway fabricated comprehensive pipeline and a method for using the same

Abstract

The application relates to the technical field of pipeline connecting equipment, in particular to a quick connecting device for a subway assembled comprehensive pipeline and a use method thereof, which is composed of a limiting mechanism, a connecting mechanism and an extending mechanism. In the application, the existing pipeline can be conveniently connected with the first connecting pipe and the second connecting pipe through internal threads, then the second connecting pipe is moved to one end of the first connecting pipe, in the process, under the blocking and correcting of the first protective frame, one end of the second connecting pipe can quickly approach the first connecting pipe until one end of the second connecting pipe can extend to the inside of the connecting groove, meanwhile, one end of the second connecting pipe is extruded and attached to the second sealing ring, at this time, one end of the second protective frame and one end of the first protective frame are attached, meanwhile, one end of the moving piece can be inserted into the inside of the first protective frame, then under the support of the resisting rod, the supporting spring can support the moving piece to approach the clamping ring, then under the support of the moving piece, the clamping strip can be attached to the inner wall of the clamping ring.

Description

Technical Field

[0001] This invention belongs to the technical field of pipeline connection equipment, specifically a quick connection device for subway prefabricated integrated pipelines and its usage method. Background Technology

[0002] A subway is a type of urban rail transit system, referring to a high-speed, high-capacity rail transit system built in cities that uses electric traction.

[0003] However, in the existing technology, when installing prefabricated air ducts, water pipes and other pipelines on site in subway stations, the traditional flange bolt connection or welding method has problems such as difficulty in alignment, cumbersome operation, low efficiency, and safety risks when working in confined spaces and at heights, which makes it difficult to meet the needs of modern rapid construction. Summary of the Invention

[0004] The purpose of this invention is to provide a rapid connection device and its usage method for subway prefabricated integrated pipelines that can quickly and efficiently perform pipeline splicing, and can adjust its own structure according to actual use needs to meet the splicing needs of pipelines of different specifications.

[0005] The technical solution adopted in this invention is as follows: A quick connection device for prefabricated integrated pipelines in subways, comprising: a limiting mechanism for providing a foundation for quick pipeline connection; A connecting mechanism, used to cooperate with a limiting mechanism to provide a foundation for quick pipeline connection, wherein the connecting mechanism is disposed on the limiting mechanism; and An extension mechanism is used to adapt to the connection of pipelines of different specifications, and the extension mechanism is disposed on the limiting mechanism.

[0006] The limiting mechanism includes a first connecting pipe, a first protective frame, and a sealing component. One end of the first connecting pipe has a connecting groove, and two slots are formed on the outer surface of the first connecting pipe. The other end of the first connecting pipe has an internal thread. The first protective frame is fitted onto the outer surface of the first connecting pipe, and the sealing component is disposed on the first connecting pipe.

[0007] The sealing component includes a first sealing ring, a stop ring, and a second sealing ring. The first sealing ring, the stop ring, and the second sealing ring are all slidably inserted into the connecting groove. The outer surfaces of the first sealing ring, the stop ring, and the second sealing ring are all in contact with the inner wall of the connecting groove. The outer surfaces on both sides of the stop ring are respectively in contact with the first sealing ring and the second sealing ring.

[0008] Two locking blocks are fixedly connected to the outer surface of the abutment ring, and each locking block is slidably inserted into the corresponding locking slot.

[0009] The first protective frame is fixedly connected with a retaining ring inside.

[0010] The connecting mechanism includes a second connecting pipe, a second protective frame, and a limiting component. One end of the second connecting pipe is slidably inserted into the first protective frame, and the other end of the second connecting pipe extends into the connecting groove. One end of the second connecting pipe is in contact with the outer surface of the second sealing ring. The other end of the second connecting pipe is also provided with an internal thread. The second protective frame is rotatably connected to the outer surface of the second connecting pipe. The limiting component is provided on the second protective frame.

[0011] The limiting components are provided in multiple sets. Each set of the limiting components includes two limiting frames, a movable piece and multiple locking strips. The two limiting frames are fixedly connected inside the second protective frame. The movable piece is slidably inserted between the two limiting frames. The multiple locking strips are fixedly connected to the top of the movable piece at equal intervals.

[0012] Each of the movable pieces is fixedly connected to four support frames at its bottom. Each support frame has a push rod slidably inserted into its bottom surface. The bottom end of each push rod is in contact with the outer surface of the second connecting tube. Each support frame has a support spring slidably inserted inside its interior. The outer surface of the second protective frame is threaded with multiple limit bolts at equal intervals. The bottom end of each limit bolt is in contact with the top of the corresponding movable piece.

[0013] The extension mechanism includes a first extension ring, a second extension ring, and a third extension ring. The first extension ring is connected to a first connecting pipe thread via an internal thread. The second extension ring is threaded to one end of the first extension ring, and the third extension ring is threaded to one end of the second extension ring.

[0014] A method for using a quick connection device for prefabricated integrated pipelines in subway systems includes the following steps: S1. Pipeline Connection: Existing pipes can be easily connected to the first and second connecting pipes via internal threads. The second connecting pipe is then moved towards one end of the first connecting pipe. During this process, under the obstruction and correction of the first protective frame, one end of the second connecting pipe can quickly approach the first connecting pipe until it extends into the connecting groove. Simultaneously, one end of the second connecting pipe presses against the second sealing ring. At this point, one end of the second protective frame and one end of the first protective frame are in contact, allowing one end of the moving piece to insert into the first protective frame. Then, supported by the abutment rod, the support spring supports the moving piece as it approaches the retaining ring. Furthermore, under the support of the moving piece... This allows the locking strip to fit against the inner wall of the retaining ring. The meshing of the retaining ring and the locking strip then ensures a stable connection between the second and first protective frames. Simultaneously, the barrier between the second and first protective frames prevents external environmental influences on the connection between the first and second connecting pipes. When separation of the first and second connecting pipes is required, rotating the limiting bolt allows it to press and adjust the position of the moving piece under the constraint of the limiting frame. This allows the moving piece to move the locking strip away from the retaining ring, enabling rapid separation of the second and first protective frames and allowing the second connecting pipe to quickly separate from the first connecting pipe. S2. Specification Adjustment: For pipes of different specifications, by adding or subtracting the first extension ring, the second extension ring, and the third extension ring, the extension mechanism can be spliced ​​with pipes of different specifications. This allows pipes of different specifications to be stably connected with the first connecting pipe and the second connecting pipe in conjunction with the extension mechanism, enabling the equipment to be used for splicing pipes of different specifications. At the same time, the compression and adhesion of the first sealing ring, the abutment ring, and the second sealing ring can tightly seal the connection between the first connecting pipe and the second connecting pipe.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: (1) In this invention, when in use, the existing pipe can be easily connected to the first connecting pipe and the second connecting pipe through the internal thread. Then, the second connecting pipe is moved towards one end of the first connecting pipe. During this process, under the obstruction and correction of the first protective frame, one end of the second connecting pipe can quickly approach the first connecting pipe until one end of the second connecting pipe can extend into the connecting groove. At the same time, one end of the second connecting pipe presses against the second sealing ring. At this time, one end of the second protective frame and one end of the first protective frame are in contact. At the same time, one end of the moving piece can be inserted into the first protective frame. Then, under the support of the abutment rod, the support spring can support the moving piece to approach the retaining ring. Then, under the support of the moving piece, the retaining strip can be attached. The inner wall of the retaining ring is engaged, and the retaining ring and retaining strip mesh to ensure a stable connection between the second and first protective frames. The second and first protective frames also act as a barrier, preventing external environmental influences on the connection between the first and second connecting pipes. When separation of the first and second connecting pipes is required, rotating the limiting bolt allows it to press and adjust the position of the moving piece under the constraint of the limiting frame. This causes the moving piece to move the retaining strip away from the retaining ring, enabling rapid separation of the second and first protective frames. This allows the second connecting pipe to quickly separate from the first connecting pipe, ensuring the equipment can efficiently perform its intended functions.

[0016] (2) In this invention, for pipes of different specifications, by adding or subtracting the first extension ring, the second extension ring and the third extension ring, the extension mechanism can be spliced ​​with pipes of different specifications, thereby enabling pipes of different specifications to be stably connected with the first connecting pipe and the second connecting pipe in conjunction with the extension mechanism, so that the equipment can be spliced ​​with pipes of different specifications, thereby improving the wide applicability of the equipment. At the same time, under the compression and fit of the first sealing ring, the abutment ring and the second sealing ring, the connection between the first connecting pipe and the second connecting pipe can be tightly sealed, so that the equipment can efficiently perform its intended functions. Attached Figure Description

[0017] Figure 1 This is a perspective view of the invention in use; Figure 2 This is a first-view perspective perspective view of the present invention; Figure 3 This is a second-view perspective perspective view of the present invention; Figure 4 This is a first-view sectional perspective view of the present invention; Figure 5 This is a first-view sectional perspective view of the limiting mechanism of the present invention; Figure 6 For the present invention Figure 5 Enlarged view of point A in the middle; Figure 7 This is a second-view sectional perspective view of the limiting mechanism of the present invention. Figure 8 This is a sectional perspective view of the connecting mechanism portion of the present invention; Figure 9 For the present invention Figure 8 Enlarged view at point B in the middle; Figure 10 This is a perspective view of the extended mechanism of the present invention.

[0018] The markings in the diagram are as follows: 1. Limiting mechanism; 101. First connecting pipe; 102. First sealing ring; 103. Abutment ring; 104. Second sealing ring; 105. Locking block; 106. First protective frame; 107. Locking ring; 108. Connecting groove; 2. Connecting mechanism; 201. Second connecting pipe; 202. Second protective frame; 203. Limiting frame; 204. Moving piece; 205. Locking strip; 206. Support frame; 207. Support spring; 208. Abutment rod; 209. Limiting bolt; 3. Extension mechanism; 301. First extension ring; 302. Second extension ring; 303. Third extension ring. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention 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 illustrative and not intended to limit the invention.

[0020] For examples, please refer to [link / reference]. Figures 1-4 A quick connection device for prefabricated integrated pipelines in subways, consisting of a limiting mechanism 1, a connecting mechanism 2, and an extension mechanism 3.

[0021] The details are as follows: Please see Figures 5-7The limiting mechanism 1 is used to provide a foundation for quick pipeline connection. The limiting mechanism 1 includes a first connecting pipe 101, a first protective frame 106, and a sealing component. One end of the first connecting pipe 101 has a connecting groove 108, and two slots are formed on the outer surface of the first connecting pipe 101. The other end of the first connecting pipe 101 has an internal thread. The first protective frame 106 is fitted onto the outer surface of the first connecting pipe 101. The sealing component is disposed on the first connecting pipe 101 and includes a first sealing ring 102, a stop ring 103, and a second sealing ring 104. The first sealing ring 102, the stop ring 103, and the second sealing ring 104 are all slidably inserted into the connecting groove 108. The outer surfaces of the first sealing ring 102, the stop ring 103, and the second sealing ring 104 are all in contact with the inner wall of the connecting groove 108. The outer surfaces of both sides of the stop ring 103 are respectively in contact with the first sealing ring 102 and the second sealing ring 104. A fixed connection is made to the outer surface of the stop ring 103. Two locking blocks 105 are slidably inserted into the corresponding locking slots. A retaining ring 107 is fixedly connected inside the first protective frame 106. The existing pipe can be easily connected to the first connecting pipe 101 and the second connecting pipe 201 through the internal thread. Then, the second connecting pipe 201 is moved towards one end of the first connecting pipe 101. During this process, under the obstruction and correction of the first protective frame 106, one end of the second connecting pipe 201 can quickly approach the first connecting pipe 101 until one end of the second connecting pipe 201 can extend into the connecting groove 108. At the same time, one end of the second connecting pipe 201 presses against the second sealing ring 104. At this time, one end of the second protective frame 202 and one end of the first protective frame 106 are in contact. At the same time, one end of the moving piece 204 can be inserted into the first protective frame 106. Then, under the support of the abutment rod 208, the support spring 207 can support the moving piece 204 to approach the retaining ring 107. Please see Figure 8 and Figure 9The connecting mechanism 2 is used to cooperate with the limiting mechanism 1 to provide a foundation for quick pipeline connection. The connecting mechanism 2 is set on the limiting mechanism 1 and includes a second connecting pipe 201, a second protective frame 202, and a limiting component. One end of the second connecting pipe 201 is slidably inserted into the first protective frame 106, and the other end of the second connecting pipe 201 extends into the connecting groove 108. One end of the second connecting pipe 201 is in contact with the outer surface of the second sealing ring 104. The other end of the second connecting pipe 201 is also provided with an internal thread. The second protective frame 202 is rotatably connected to the outer surface of the second connecting pipe 201, limiting the connection. The components are mounted on the second protective frame 202. Multiple sets of limiting components are provided, each set including two limiting frames 203, a movable piece 204, and multiple retaining strips 205. The two limiting frames 203 are fixedly connected inside the second protective frame 202. The movable piece 204 is slidably inserted between the two limiting frames 203. Multiple retaining strips 205 are equidistantly fixedly connected to the top of the movable piece 204. Four support frames 206 are fixedly connected to the bottom of each movable piece 204. A stop rod 208 is slidably inserted into the bottom surface of each support frame 206. The bottom end of each stop rod 208 is connected to the second connecting pipe 200. The outer surfaces of the first and second protective frames are all fitted together. Each support frame 206 has a support spring 207 slidably inserted inside. The outer surface of the second protective frame 202 is threaded with multiple limit bolts 209 at equal intervals. The bottom end of each limit bolt 209 is fitted with the top of the corresponding moving piece 204. Under the support of the moving piece 204, the retaining strip 205 can fit against the inner wall of the retaining ring 107. Then, with the retaining ring 107 and the retaining strip 205 meshing and matching, the second protective frame 202 and the first protective frame 106 can be stably connected. At the same time, the second protective frame 202 and the first protective frame 106 are blocked by the barrier of the first protective frame, making it difficult for the external environment to affect the first protective frame 202. The connection between the connecting pipe 101 and the second connecting pipe 201 causes an impact. When it is necessary to separate the first connecting pipe 101 and the second connecting pipe 201, by rotating the limiting bolt 209, the limiting bolt 209 can squeeze the adjusting moving piece 204 under the position restriction of the limiting frame 203. This allows the moving piece 204 to drive the locking strip 205 away from the locking ring 107, thereby enabling the separation of the second protective frame 202 and the first protective frame 106 quickly. This allows the second connecting pipe 201 to be quickly separated from the first connecting pipe 101, enabling the equipment to efficiently perform its intended functions. Please see Figure 10The extension mechanism 3 is used to adapt to the connection of pipelines of different specifications. The extension mechanism 3 is set on the limiting mechanism 1. The extension mechanism 3 includes a first extension ring 301, a second extension ring 302, and a third extension ring 303. The first extension ring 301 is threaded to the first connecting pipe 101 via an internal thread. The second extension ring 302 is threaded to one end of the first extension ring 301, and the third extension ring 303 is threaded to one end of the second extension ring 302. For pipelines of different specifications, the first extension ring 301, the second extension ring 302, and the third extension ring 303 are used to connect the pipelines. The addition or subtraction of ring 303 allows the extension mechanism 3 to be used with pipes of different specifications, thereby enabling pipes of different specifications to be stably connected with the first connecting pipe 101 and the second connecting pipe 201 in conjunction with the extension mechanism 3. This allows the equipment to be used with pipes of different specifications, improving the versatility of the equipment in actual use. At the same time, the compression and adhesion of the first sealing ring 102, the abutment ring 103 and the second sealing ring 104 can tightly seal the connection between the first connecting pipe 101 and the second connecting pipe 201, enabling the equipment to efficiently perform its intended functions.

[0022] The following describes in detail the method of using a quick connection device for prefabricated integrated pipelines in subways provided by an embodiment of the present invention. The method of use includes the following steps: Step 1, Pipeline Connection: The existing pipes can be easily connected to the first connecting pipe 101 and the second connecting pipe 201 via internal threads. Then, the second connecting pipe 201 is moved towards one end of the first connecting pipe 101. During this process, under the obstruction and correction of the first protective frame 106, one end of the second connecting pipe 201 can quickly approach the first connecting pipe 101 until it extends into the connecting groove 108. Simultaneously, one end of the second connecting pipe 201 presses against the second sealing ring 104. At this point, one end of the second protective frame 202 and one end of the first protective frame 106 are in contact, allowing one end of the moving piece 204 to be inserted into the first protective frame 106. Then, supported by the abutment rod 208, the support spring 207 supports the moving piece 204 to approach the retaining ring 107. Finally, supported by the moving piece 204, the retaining strip 205 is able to fit against the retaining ring. The inner wall of 107, and then the engagement and matching of the retaining ring 107 and the retaining strip 205, make the second protective frame 202 and the first protective frame 106 firmly connected. At the same time, the barrier of the second protective frame 202 and the first protective frame 106 makes it difficult for the external environment to affect the connection between the first connecting pipe 101 and the second connecting pipe 201. When it is necessary to separate the first connecting pipe 101 and the second connecting pipe 201, by rotating the limiting bolt 209, the limiting bolt 209 can squeeze the adjustment moving piece 204 to use position under the position restriction of the limiting frame 203. Then, the moving piece 204 can drive the retaining strip 205 away from the retaining ring 107, and then the separation of the second protective frame 202 and the first protective frame 106 can be carried out quickly, so that the second connecting pipe 201 can be quickly separated from the first connecting pipe 101, and the equipment can efficiently realize its intended function. Step 2, Specification Adjustment: For pipes of different specifications, by adding or subtracting the first extension ring 301, the second extension ring 302, and the third extension ring 303, the extension mechanism 3 can be spliced ​​with pipes of different specifications. This allows pipes of different specifications to be stably connected with the first connecting pipe 101 and the second connecting pipe 201 in conjunction with the extension mechanism 3, enabling the equipment to be used with pipes of different specifications and improving the versatility of the equipment in actual use. At the same time, under the compression and adhesion of the first sealing ring 102, the abutment ring 103, and the second sealing ring 104, the connection between the first connecting pipe 101 and the second connecting pipe 201 can be tightly sealed, enabling the equipment to efficiently perform its intended functions.

[0023] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A quick connection device for prefabricated integrated pipelines in subway systems, characterized in that, include: Limiting mechanism (1) is used to provide a foundation for quick pipeline connection; A connecting mechanism (2) is used to cooperate with the limiting mechanism (1) to provide a foundation for quick pipeline connection. The connecting mechanism (2) is disposed on the limiting mechanism (1). as well as An extension mechanism (3) is used to adapt to the connection of pipelines of different specifications. The extension mechanism (3) is set on the limiting mechanism (1).

2. The quick connection device for prefabricated integrated pipelines in subways as described in claim 1, characterized in that: The limiting mechanism (1) includes a first connecting pipe (101), a first protective frame (106) and a sealing component. One end of the first connecting pipe (101) is provided with a connecting groove (108). Two slots are provided on the outer surface of the first connecting pipe (101). The other end of the first connecting pipe (101) is provided with an internal thread. The first protective frame (106) is sleeved on the outer surface of the first connecting pipe (101). The sealing component is provided on the first connecting pipe (101).

3. The quick connection device for prefabricated integrated pipelines in subways as described in claim 2, characterized in that: The sealing component includes a first sealing ring (102), a stop ring (103), and a second sealing ring (104). The first sealing ring (102), the stop ring (103), and the second sealing ring (104) are all slidably inserted into the connecting groove (108). The outer surfaces of the first sealing ring (102), the stop ring (103), and the second sealing ring (104) are all in contact with the inner wall of the connecting groove (108). The outer surfaces on both sides of the stop ring (103) are respectively in contact with the first sealing ring (102) and the second sealing ring (104).

4. The quick connection device for prefabricated integrated pipelines in subways as described in claim 3, characterized in that: Two locking blocks (105) are fixedly connected to the outer surface of the abutment ring (103), and each locking block (105) is slidably inserted into the corresponding slot.

5. The quick connection device for prefabricated integrated pipelines in subways as described in claim 4, characterized in that: The first protective frame (106) is fixedly connected with a retaining ring (107).

6. The quick connection device for prefabricated integrated pipelines in subways as described in claim 5, characterized in that: The connecting mechanism (2) includes a second connecting tube (201), a second protective frame (202) and a limiting component. One end of the second connecting tube (201) is slidably inserted into the first protective frame (106), and one end of the second connecting tube (201) extends into the connecting groove (108). One end of the second connecting tube (201) is attached to the outer surface of the second sealing ring (104). The other end of the second connecting tube (201) is also provided with an internal thread. The second protective frame (202) is rotatably connected to the outer surface of the second connecting tube (201). The limiting component is provided on the second protective frame (202).

7. The quick connection device for prefabricated integrated pipelines in subways as described in claim 6, characterized in that: The limiting components are provided in multiple sets. Each set of the limiting components includes two limiting frames (203), a movable piece (204), and multiple locking strips (205). The two limiting frames (203) are fixedly connected inside the second protective frame (202). The movable piece (204) is slidably inserted between the two limiting frames (203). The multiple locking strips (205) are fixedly connected at equal intervals to the top of the movable piece (204).

8. The quick connection device for prefabricated integrated pipelines in subways as described in claim 7, characterized in that: Each of the movable pieces (204) has four support frames (206) fixedly connected to its bottom. Each of the support frames (206) has a push rod (208) slidably inserted into its bottom surface. The bottom end of each push rod (208) is in contact with the outer surface of the second connecting tube (201). Each of the support frames (206) has a support spring (207) slidably inserted into its interior. The outer surface of the second protective frame (202) is threaded with multiple limit bolts (209) at equal intervals. The bottom end of each limit bolt (209) is in contact with the top of the corresponding movable piece (204).

9. A quick connection device for prefabricated integrated pipelines in subways as described in claim 8, characterized in that: The extension mechanism (3) includes a first extension ring (301), a second extension ring (302) and a third extension ring (303). The first extension ring (301) is threadedly connected to the first connecting pipe (101) through an internal thread. The second extension ring (302) is threadedly connected to one end of the first extension ring (301). The third extension ring (303) is threadedly connected to one end of the second extension ring (302).

10. A method for using a quick connection device for prefabricated integrated pipelines in subway systems, characterized in that... The quick connection device for a prefabricated integrated pipeline system for subways, as described in claim 9, includes the following steps: S1. Pipeline Connection: The existing pipeline can be easily connected to the first connecting pipe (101) and the second connecting pipe (201) through internal threads. Then, the second connecting pipe (201) is moved towards one end of the first connecting pipe (101). During this process, under the obstruction and correction of the first protective frame (106), one end of the second connecting pipe (201) can quickly approach the first connecting pipe (101) until one end of the second connecting pipe (201) can extend into the connecting groove (108). At the same time, one end of the second connecting pipe (201) presses against the second sealing ring (104). At this time, one end of the second protective frame (202) and one end of the first protective frame (106) are in contact. At the same time, one end of the moving piece (204) can be inserted into the first protective frame (106). Then, under the support of the abutment rod (208), the support spring (207) can support the moving piece (204) to approach the retaining ring (107). Then, under the support of the moving piece (204), the retaining strip (205) is moved towards the retaining ring (107). The retaining ring (107) can fit snugly against the inner wall of the retaining ring (107), and under the meshing and matching of the retaining ring (107) and the retaining strip (205), the second protective frame (202) and the first protective frame (106) can be stably connected. At the same time, under the barrier of the second protective frame (202) and the first protective frame (106), the external environment is not easily affected by the connection between the first connecting pipe (101) and the second connecting pipe (201). When it is necessary to connect the first connecting pipe (101) and the second connecting pipe (205), the connection between the first connecting pipe (101) and the second connecting pipe (205) can be made secure. 01) During separation, by rotating the limiting bolt (209), the limiting bolt (209) can squeeze the adjustment moving piece (204) to the position under the position restriction of the limiting frame (203), thereby enabling the moving piece (204) to drive the locking strip (205) away from the locking ring (107), and then the separation process of the second protective frame (202) and the first protective frame (106) can be carried out quickly, so that the second connecting pipe (201) can be quickly separated from the first connecting pipe (101); S2, Specification Adjustment: For pipes of different specifications, by adding or subtracting the first extension ring (301), the second extension ring (302) and the third extension ring (303), the extension mechanism (3) can be spliced ​​with pipes of different specifications, thereby enabling pipes of different specifications to be stably connected with the extension mechanism (3) and the first connecting pipe (101) and the second connecting pipe (201), so that the equipment can be spliced ​​with pipes of different specifications. At the same time, under the compression and adhesion of the first sealing ring (102), the abutment ring (103) and the second sealing ring (104), the connection between the first connecting pipe (101) and the second connecting pipe (201) can be tightly sealed.

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