A precast concrete drainage pipe connection structure and a method of using the same

Abstract

The application provides a precast concrete drainage pipe connecting structure and a use method thereof, and belongs to the technical field of concrete pipes. The precast concrete drainage pipe connecting structure comprises a pipe A, a connecting groove arranged on the inner side of one end of the pipe A, a pipe B connected to one end of the pipe A, the pipe B being provided with a connecting ring on one side, two reinforcing grooves arranged on the inner surfaces of the connecting groove, two bases arranged in the two reinforcing grooves respectively, two sliding grooves arranged on the reinforcing grooves respectively, and two springs, one end of each of the two springs being fixed to the inner walls of the two sliding grooves. In the application, the pipes A and B are embedded and connected, so that the sealing between the pipes A and B can be effectively ensured, the gap between the pipes A and B is not easy to be generated after connection, and the leakage is not easy to be generated during the drainage process.

Description

Technical Field

[0001] This invention belongs to the field of concrete pipe technology, specifically relating to a precast concrete drainage pipe connection structure and its usage method. Background Technology

[0002] Precast concrete drainage pipes are manufactured in advance, transported to designated pits, and then buried and assembled to gradually form a complete underground drainage system. The main advantages of precast concrete drainage pipes are reliable structure, high pipe hardness, high seismic stability, strong corrosion resistance, and the ability to meet special requirements. Currently, the largest diameter of precast concrete drainage pipes can reach DN4000, meeting the requirement of an internal test pressure of 0.3 MPa. They are widely used in municipal public works, stormwater and sewage culverts, and power pipelines.

[0003] A search revealed a Chinese patent with authorization announcement number "CN 108824595A" that discloses an underground pipeline connection device for a wastewater treatment plant. The device includes precast concrete pipes and cast iron joints. The cast iron joint is fitted onto the interface of two precast concrete pipes. The cast iron joint has a tubular structure with an annular casting groove on its inner wall and a casting hole connected to the casting groove. This invention involves fitting a cast iron joint over the interface of a precast concrete pipe. The cast iron joint has a casting port and a casting groove. Two mating precast concrete pipes are inserted into the cast iron joint, and concrete is poured into the joint through the casting port. The concrete fills the casting groove and the gap between the cast iron joint and the precast concrete pipes. After the concrete solidifies, the cast iron joint is connected and fixed to the precast concrete pipes. The cast iron joint protects the interface of the precast concrete pipes, effectively preventing plant roots from penetrating the precast concrete pipes at the interface.

[0004] However, in order to ensure a tight connection between the two pipes after long-term use and prevent gaps from forming, the above technical solution involves casting a protective layer at the connection point. While this method effectively prevents the two pipes from loosening and forming gaps after long-term use, it is extremely troublesome to dismantle. Since the pipes are cast together, multiple pipes need to be damaged and replaced, which is very inconvenient. Summary of the Invention

[0005] The purpose of this invention is to provide a precast concrete drainage pipe connection structure and its usage method, aiming to solve the problem that the removal of drainage pipes in the prior art is extremely troublesome, and because the pipes are cast together, multiple pipes need to be damaged and replaced.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A precast concrete drainage pipe connection structure, comprising:

[0008] Pipe A;

[0009] A connecting groove is formed on the inner side of one end of the pipe A;

[0010] Pipe B is connected to one end of pipe A, and a connecting ring is provided on one side of pipe B;

[0011] Two reinforcing grooves are provided, both of which are formed on the inner surface of the connecting groove;

[0012] The base has two parts, each disposed within one of the two reinforcing grooves;

[0013] Two sliding grooves are provided, which are respectively opened on the two bases 6;

[0014] Two springs are provided, and one end of each spring is fixed to the inner wall of the two grooves respectively;

[0015] The card block has two parts, which are respectively fixed to the other end of the two springs and slidably connected in the two grooves;

[0016] Two slots are provided, both formed on the circumferential surface of the connecting ring, and the slots match the locking blocks; and

[0017] An unlocking mechanism is provided inside the connecting ring to allow pipe A to be disconnected from pipe B.

[0018] In a preferred embodiment of the present invention, the connecting ring is integrally formed on one side of the pipe B, and the connecting ring is embedded in the connecting groove.

[0019] In a preferred embodiment of the present invention, two positioning grooves are formed on the circumferential surface of the connecting ring, and two positioning blocks are fixed on the inner surface of the connecting grooves, with the two positioning blocks slidably connected to the two positioning grooves respectively.

[0020] As a preferred embodiment of the present invention, both of the card blocks have an arc-shaped surface on one side.

[0021] As a preferred embodiment of the present invention, the unlocking mechanism includes:

[0022] Two pressure blocks are provided, each fixed in one of the two slots;

[0023] An annular groove is formed on the inner side of the circumferential surface of the connecting ring;

[0024] The separation groove has two sections, both of which begin on the circumferential surface of the connecting ring and communicate with the annular groove.

[0025] As a preferred embodiment of the present invention, a water-retaining rubber pad is fixedly provided on one side of the inner wall of the connecting groove.

[0026] As a preferred embodiment of the present invention, limit grooves are formed on both sides of the inner walls of the two sliding grooves, and limit blocks are fixed on both sides of the two locking blocks, and the two limit blocks are slidably connected in the two limit grooves respectively.

[0027] As a preferred embodiment of the present invention, both springs are provided with telescopic sleeves.

[0028] As a preferred embodiment of the present invention, both pipe A and pipe B are fixed with flow-blocking ring plates on their circumferential surfaces, and both pipe A and pipe B have multiple force-bearing grooves on their circumferential inner walls.

[0029] A method for using a precast concrete drainage pipe connection structure includes the following steps:

[0030] S1. First, place pipe A and pipe B horizontally and align the two positioning blocks and two positioning grooves respectively. Then push pipe B towards pipe A so that the connecting ring is embedded in the connecting groove.

[0031] S2. When the connecting ring slides, it will squeeze the locking block. The arc surface allows the connecting ring to smoothly press the locking block into the groove. When the groove and the locking block match, the elasticity of the spring can reset the locking block and embed it into the groove to lock the connecting ring. This makes it difficult for pipe A and pipe B to loosen after connection. At this time, there is a gap between the pressing block and the locking block.

[0032] S3. When pipe B needs to be separated from pipe A, continue to push pipe B into the connecting groove, so that the connecting ring continues to move. At the same time, the positioning block is pushed into the annular groove. At this time, the pressure block on the connecting ring contacts the locking block, and the locking block is squeezed again by the arc surface, so that the clockwise side of the locking block is pressed into the sliding groove. At this time, rotating pipe A clockwise can smoothly squeeze the locking block into the sliding groove. Rotate until the positioning block matches the separation groove, and pull it outward to remove pipe B.

[0033] Compared with the prior art, the beneficial effects of the present invention are:

[0034] 1. In this invention, the embedded connection between pipe A and pipe B can effectively ensure the sealing between pipe A and pipe B, making it less likely for gaps to form between them after connection, and less likely for leakage to occur during drainage and other processes.

[0035] 2. In this invention, when pipe A and pipe B are connected, the connecting ring is embedded in the connecting groove. By embedding the locking block into the locking groove, the connecting ring can be further locked in the connecting groove, making it difficult for pipe A and pipe B to separate. This makes the connection between pipe A and pipe B more secure and less prone to loosening.

[0036] 3. In this invention, the positioning block and positioning groove enable better alignment of the slot and the block when the connecting ring is embedded in the connecting groove, making it easier for the block to be inserted into the slot to fix the connecting ring, thus making the connection between pipe A and pipe B more convenient.

[0037] 4. In this invention, the unlocking mechanism allows the locking force of the locking block on the slot to be released after the pipe B is pushed and rotated, thus making it easy to remove the pipe B. This replaces the previous method of fixing the pipe A and pipe B by pouring concrete. It does not require damage to the main body of the pipe A and pipe B, and can not only strengthen the connection between the pipe A and pipe B, but also facilitate the disassembly of the pipe A and pipe B.

[0038] 5. In this invention, the limiting block and limiting groove ensure that when the card block slides in the groove, the side of the arc surface near the spring is always inside the groove and is not easy to slide out of the groove. This allows the connecting ring to smoothly press the card block into the groove when it abuts against the arc surface of the card block, and at the same time makes it difficult for the card block to fall off the groove. Attached Figure Description

[0039] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0040] Figure 1 This is a first-view perspective perspective view of the present invention;

[0041] Figure 2 This is a partial perspective view of pipe A in this invention;

[0042] Figure 3 This is a partial perspective view of pipe B in this invention;

[0043] Figure 4 This is a partial exploded view of pipe A in this invention;

[0044] Figure 5 In this invention Figure 4 A magnified view of a section at point A in the middle;

[0045] Figure 6 This is a partial exploded view of pipe B in this invention;

[0046] Figure 7 This is a cross-sectional view of the present invention;

[0047] Figure 8 This is a side view of pipe A in this invention;

[0048] Figure 9 This is a second-view perspective perspective view of the present invention.

[0049] In the diagram: 1. Pipe A; 2. Pipe B; 3. Connecting groove; 4. Connecting ring; 5. Reinforcing groove; 6. Base; 7. Sliding groove; 8. Limiting groove; 9. Spring; 10. Telescopic sleeve; 11. Locking block; 12. Arc-shaped surface; 13. Limiting block; 14. Locking groove; 15. Pressure block; 16. Positioning groove; 17. Separation groove; 18. Annular groove; 19. Positioning block; 20. Water-blocking rubber pad; 21. Force-bearing groove; 22. Flow-stopping ring plate; 23. Sealing ring. Detailed Implementation

[0050] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0051] Example 1

[0052] Please see Figures 1-9 The present invention provides the following technical solutions:

[0053] A precast concrete drainage pipe connection structure, comprising:

[0054] Pipe A1;

[0055] Connection groove 3 is located on the inner side of one end of pipe A1;

[0056] Pipe B2 is connected to one end of pipe A1, and a connecting ring 4 is provided on one side of pipe B2;

[0057] Two reinforcing grooves 5 are provided, both of which are opened on the inner surface of the connecting groove 3;

[0058] The base 6 has two parts, which are respectively set in two reinforcing grooves 5;

[0059] Two slides 7 are provided, each opened on one of the two bases 6;

[0060] Two springs 9 are provided, and one end of each spring 9 is fixed to the inner wall of the two slide grooves 7 respectively;

[0061] Two locking blocks 11 are provided, which are respectively fixed to the other end of two springs 9 and slidably connected in two sliding grooves 7;

[0062] Two slots 14 are provided, both formed on the circumferential surface of the connecting ring 4, and the slots 14 match the locking block 11; and

[0063] The unlocking mechanism is located inside the connecting ring 4 to disconnect pipe A1 from pipe B2.

[0064] In a specific embodiment of the present invention, pipe A1 and pipe B2 are connected to form a connecting water pipe for drainage. Pipe B2 is located downstream of pipe A1. When pipe A1 and pipe B2 are connected, a connecting ring 4 is embedded in the connecting groove 3. The connecting ring 4 is integrally formed with pipe B2, and the outer diameter of the connecting ring 4 matches the inner diameter of the connecting groove 3. The base 6 is welded into the reinforcing groove 5. The base 6 allows the parts in the sliding groove 7 to be prefabricated on the outside and then installed in the reinforcing groove 5. Two bases 6 are provided, respectively... The diagonally opposite positions within the connecting groove 3 also cause the two sliding grooves 7 to be located diagonally opposite. The two locking blocks 11 are connected to the sliding grooves 7 by springs 9. Because the two sliding grooves 7 are diagonally opposite, the two locking blocks 11 are symmetrically distributed. This results in one side of the clockwise locking block 11 being more fully embedded in the sliding groove 7, and the other side being less fully embedded. When the connecting ring 4 is embedded in the connecting groove 3, it contacts the locking block 11, pressing the locking block 11 into the sliding groove 7 and compressing the spring 9. The locking groove 14 on the connecting ring 4 then engages with the locking block 11. When block 11 is matched, the elasticity of spring 9 allows block 11 to reset, embedding it into slot 14 and hooking the connecting ring 4, thus securing it better. At this time, pressure block 15 in slot 14 does not contact block 11, allowing the connecting ring 4 to be better fixed within the connecting groove 3, resulting in a more secure connection between pipe A1 and pipe B2. When connecting ring 4 and connecting groove 3 are connected, the end of connecting ring 4 does not contact one side of the inner wall of connecting groove 3, leaving room for movement. To separate pipes A1 and B2, pipe B2 is pushed further into pipe A1, causing the connecting ring 4 to continue to compress. The unlocking mechanism prevents the locking block 11 from being located in the slot 14. Pipe B2 can then be rotated to remove it. This method replaces the previous method of fixing pipes A1 and B2 by pouring concrete, without damaging the main body of pipes A1 and B2. It not only strengthens the connection between pipes A1 and B2 but also facilitates the disassembly of pipes A1 and B2.

[0065] Please refer to the details. Figure 1 The connecting ring 4 is integrally formed on one side of the pipe B2 and is embedded in the connecting groove 3.

[0066] In this embodiment: the connecting ring 4 and the pipe B2 are integrally formed, making it more robust. When the connecting ring 4 is embedded in the connecting groove 3 and the locking block 11 is located in the locking groove 14, a section of the surface of the connecting ring 4 is still outside the connecting groove 3, so the connecting ring 4 can still slide forward. Since the pipe B2 is located downstream of the pipe A1, this makes it difficult for the pipe B2 to slide automatically into the pipe A1.

[0067] Please refer to the details. Figure 1 and Figure 8 Two positioning grooves 16 are formed on the circumferential surface of the connecting ring 4, and two positioning blocks 19 are fixed on the inner surface of the connecting groove 3. The two positioning blocks 19 are slidably connected to the two positioning grooves 16 respectively.

[0068] In this embodiment: with the provided positioning block 19 and positioning groove 16, when the connecting ring 4 is embedded in the connecting groove 3, the slot 14 and the block 11 can be better aligned, making it easier for the block 11 to be inserted into the slot 14 to fix the connecting ring 4, making the connection between pipe A1 and pipe B2 more convenient.

[0069] Please refer to the details. Figure 5 Both of the two card blocks 11 have an arc-shaped surface 12 on one side.

[0070] In this embodiment: by setting the arc surface 12, the connecting ring 4 will first contact the arc surface 12 when it is pushed into the connecting groove 3 and when the pressure block 15 squeezes the card block 11. In this way, without external force, the card block 11 can be squeezed into the slide groove 7 by the squeezing force, without the need for an external hole in the pipe A1. This not only increases the sealing performance, but also makes it more convenient.

[0071] Please refer to the details. Figure 3 The unlocking mechanisms include:

[0072] Two pressure blocks 15 are provided, each fixed in one of the two slots 14;

[0073] An annular groove 18 is formed on the inner side of the circumferential surface of the connecting ring 4;

[0074] There are two separation grooves 17, both of which start at the circumferential surface of the connecting ring 4 and communicate with the annular groove 18.

[0075] In this embodiment: When it is necessary to separate pipe A1 and pipe B2, before separation, the positioning block 19 is located in the positioning groove 16. During separation, pipe B2 is pushed into pipe A1, and the connecting ring 4 continues to enter the connecting groove 3. The locking block 11 is embedded in the locking groove 14. At this time, there is space between the end of the connecting ring 4 and the inner wall of the connecting groove 3, and the pressure block 15 is not under force with the connecting ring 4. Therefore, the connecting ring 4 can continue to be pushed. When pushed, the connecting ring 4 drives the pressure block 15 to squeeze the locking block 11. Since the two locking blocks 11 are located diagonally opposite each other in the connecting groove 3, taking the upper right locking block 11 as an example, at this time, the clockwise side of the locking block 11 is more in the sliding groove 7, and the lower side is more in the sliding groove 7. Similarly, the side of the locking block 11 located on the lower left side has more space inside the sliding groove 7 in the clockwise direction, while the side on the upper side has less space inside the sliding groove 7. Under the pressure of the pressing block 15, the side with more space is squeezed into the sliding groove 7 and embedded in the sliding groove 7. When the pipe B2 is rotated, the pipe B2 drives the connecting ring 4 to rotate clockwise. The edge of the locking groove 14 is not obstructed by the locking block 11, and the locking block 11 can continue to be completely compressed into the sliding groove 7. When the positioning block 19 matches the separation groove 17, the pipe B2 can be pulled out to effectively separate the pipe A1 and the pipe B2 without easily damaging the pipe A1 and the pipe B2.

[0076] Please refer to the details. Figure 5 A water-blocking rubber pad 20 is fixedly installed on one side of the inner wall of the connecting groove 3.

[0077] In this embodiment: because the material of the water-blocking rubber pad 20 is elastic and has good sealing performance, when the connecting ring 4 is inserted into the connecting groove 3, and the locking block 11 is embedded in the locking groove 14 to fix the connecting ring 4, the water-blocking rubber pad 20 can effectively seal the connection between the inner wall of the connecting groove 3 and the end of the connecting ring 4 by abutting against the end of the connecting ring 4 through its elasticity. At the same time, due to the elasticity of the water-blocking rubber pad 20, it will not affect the connecting ring 4 from continuing to move into the connecting groove 3, so that when the pipe A1 and the pipe B2 are separated, the connecting ring 4 can also be well inserted into the connecting groove 3 to squeeze the water-blocking rubber pad 20, which can compress the water-blocking rubber pad 20 so that the pressure block 15 contacts and squeezes the locking block 11, without affecting the removal of the pipe B2.

[0078] Please refer to the details. Figure 5 Limiting grooves 8 are provided on both sides of the inner wall of the two sliding grooves 7, and limiting blocks 13 are fixed on both sides of the two locking blocks 11. The two limiting blocks 13 are slidably connected in the two limiting grooves 8 respectively.

[0079] In this embodiment: the limiting block 13 and the limiting groove 8 ensure that when the locking block 11 slides in the slide groove 7, the side of the arc surface 12 near the spring 9 is always inside the slide groove 7 and is not easy to slide out of the slide groove 7. This allows the connecting ring 4 to smoothly press the locking block 11 into the slide groove 7 when it abuts against the arc surface 12 on the locking block 11, and at the same time makes it difficult for the locking block 11 to fall off the slide groove 7.

[0080] Please refer to the details. Figure 5 Both springs 9 have telescopic sleeves 10 inside.

[0081] In this embodiment: by providing telescopic sleeves 10 inside both springs 9, the springs 9 are not prone to elastic deformation when compressed or reset, and the telescopic sleeves 10 can extend and retract without affecting the compression of the springs 9. The two ends of the telescopic sleeves 10 are fixed to the bottom wall of the slide groove 7 and the end of the locking block 11, respectively.

[0082] Please refer to the details. Figure 1 and Figure 2 Both pipe A1 and pipe B2 have flow-cutting ring plates 22 fixed on their circumferential surfaces, and both pipe A1 and pipe B2 have multiple force-bearing grooves 21 on their circumferential inner walls.

[0083] In this embodiment: the intercepting ring plate 22, due to its structure, can enhance the interception and seepage prevention effect of pipes passing under dams and cofferdams and drainage and sewage pipes when used in municipal and water conservancy and hydropower projects, or in drainage and sewage pipes in daily life. It can also reduce serious soil loss caused by long-term water seepage in the "water gap channel" and avoid deformation and instability of the soil around the pipe. The multiple force-bearing grooves 21 can be used to embed pipes B2 and A1 into the force-bearing grooves 21 when they move, through the internal clamping tools, so that they can better bear the force.

[0084] Please refer to the details. Figure 1 A sealing ring 23 is fixed to the end surface of pipe B2. The inner diameter of the sealing ring 23 matches the outer diameter of pipe A1. When the connecting ring 4 is embedded in the connecting groove 3, it can wrap around pipe A1 to achieve a further sealing effect.

[0085] It should be noted that this invention only illustrates the connection between two pipes. The end of pipe A1 furthest from pipe B2 is the same as the end of pipe B2 closest to pipe A1, and the end of pipe B2 furthest from pipe A1 is the same as the end of pipe A1 closest to pipe B2. Therefore, the specific structural diagrams of the furthest ends of pipes A1 and B2 are not shown, but the connection method is the same and does not affect the connection between multiple pipes.

[0086] Example 2

[0087] This embodiment provides a method for using a precast concrete drainage pipe connection structure, which further explains the principle and working method of the precast concrete drainage pipe connection structure provided in Example 1, as follows:

[0088] A method for using a precast concrete drainage pipe connection structure includes the following steps:

[0089] S1. First, place pipe A1 and pipe B2 horizontally, and align the two positioning blocks 19 and the two positioning grooves 16 respectively. Then push pipe B2 toward pipe A1 so that the connecting ring 4 is embedded in the connecting groove 3.

[0090] S2. When the connecting ring 4 slides, it will squeeze the locking block 11. The arc surface 12 allows the connecting ring 4 to smoothly press the locking block 11 into the sliding groove 7. When the groove 14 matches the locking block 11, the elasticity of the spring 9 can reset the locking block 11 and embed it into the groove 14 to lock the connecting ring 4, so that the connection between pipe A1 and pipe B2 is not easy to loosen. At this time, there is a gap between the pressing block 15 and the locking block 11.

[0091] S3. When pipe B2 needs to be separated from pipe A1, continue pushing pipe B2 into the connecting groove 3, causing the connecting ring 4 to continue moving. Simultaneously, the positioning block 19 is pushed into the annular groove 18. At this time, the pressure block 15 on the connecting ring 4 contacts the locking block 11, and the arc-shaped surface 12 presses the locking block 11 again, causing one side of the locking block 11 to be pressed into the sliding groove 7 clockwise. Rotating pipe A1 clockwise at this time allows the locking block 11 to be fully squeezed into the sliding groove 7. Rotating until the positioning block 19 matches the separation groove 17, and then pulling it outwards, pipe B2 can be removed. In this invention, the embedded connection between pipe A1 and pipe B2... This design effectively ensures the sealing between pipes A1 and B2, preventing gaps from forming after connection and reducing the likelihood of leakage during drainage. Simultaneously, the included unlocking mechanism allows pipe B2 to be easily removed by pushing and rotating, releasing the locking force of the locking block 11 on the locking groove 14. This replaces the previous method of fixing pipes A1 and B2 by pouring concrete, without damaging the main body of pipes A1 and B2. It not only strengthens the connection between pipes A1 and B2 but also facilitates their disassembly.

[0092] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A precast concrete drainage pipe connection structure, characterized in that, include: Pipeline A (1); A connecting groove (3) is provided on the inner side of one end of the pipe A (1); Pipe B (2) is connected to one end of pipe A (1), and a connecting ring (4) is provided on one side of pipe B (2). Two reinforcing grooves (5) are provided, both of which are opened on the inner surface of the connecting groove (3); The base (6) has two parts, which are respectively located in the two reinforcing grooves (5); Two slides (7) are provided, which are respectively opened on the two bases (6); Two springs (9) are provided, and one end of each spring (9) is fixed to the inner wall of the two grooves (7); Two locking blocks (11) are provided, which are respectively fixed to the other end of the two springs (9) and respectively slidably connected in the two sliding grooves (7); Two slots (14) are provided, both of which are formed on the circumferential surface of the connecting ring (4), and the slots (14) match the locking block (11); and An unlocking mechanism is provided within the connecting ring (4) to disengage the pipe A (1) from the pipe B (2); the unlocking mechanism includes: Two pressure blocks (15) are provided, which are respectively fixed in the two slots (14); An annular groove (18) is formed on the inner side of the circumferential surface of the connecting ring (4); Two separation grooves (17) are provided, both of which start at the circumferential surface of the connecting ring (4) and communicate with the annular groove (18); The connecting ring (4) has two positioning grooves (16) on its circumferential surface. The inner surface of the connecting groove (3) has two positioning blocks (19) fixed, and the two positioning blocks (19) are slidably connected to the two positioning grooves (16). First, place pipe A (1) and pipe B (2) horizontally, and align the two positioning blocks (19) and the two positioning grooves (16) respectively. Then push pipe B (2) toward pipe A (1) so that the connecting ring (4) is embedded in the connecting groove (3). When pipe B (2) needs to be separated from pipe A (1), continue to push pipe B (2) into the connecting groove (3) so that the connecting ring (4) continues to move. At the same time, the positioning block (19) is pushed into the annular groove (18). At this time, the pressure block (15) on the connecting ring (4) contacts the locking block (11) and squeezes the locking block (11) again through the arc surface (12), so that the clockwise side of the locking block (11) is pressed into the sliding groove (7). At this time, rotate pipe A (1) clockwise, and the locking block (11) can be squeezed into the sliding groove (7) smoothly. Rotate until the positioning block (19) matches the separation groove (17) and pull it outward to remove pipe B (2).

2. The precast concrete drainage pipe connection structure according to claim 1, characterized in that, The connecting ring (4) is integrally formed on one side of the pipe B (2), and the connecting ring (4) is embedded in the connecting groove (3).

3. The precast concrete drainage pipe connection structure according to claim 2, characterized in that, Both of the card blocks (11) have an arc-shaped surface (12) on one side.

4. The precast concrete drainage pipe connection structure according to claim 3, characterized in that, A water-blocking rubber pad (20) is fixedly installed on one side of the inner wall of the connecting groove (3).

5. A precast concrete drainage pipe connection structure according to claim 4, characterized in that, Limiting grooves (8) are provided on both sides of the inner walls of the two sliding grooves (7), and limiting blocks (13) are fixed on both sides of the two locking blocks (11). The two limiting blocks (13) are slidably connected in the two limiting grooves (8).

6. The precast concrete drainage pipe connection structure according to claim 5, characterized in that, Both springs (9) are provided with telescopic sleeves (10).

7. A precast concrete drainage pipe connection structure according to claim 6, characterized in that, Both pipe A (1) and pipe B (2) have flow-blocking ring plates (22) fixed on their circumferential surfaces, and both pipe A (1) and pipe B (2) have multiple force-bearing grooves (21) on their circumferential inner walls.

8. A method of using a precast concrete drainage pipe connection structure, applied to the precast concrete drainage pipe connection structure described in claim 7, characterized in that, Includes the following steps: S1. First, place pipe A (1) and pipe B (2) horizontally, and align the two positioning blocks (19) and the two positioning grooves (16) respectively. Then push pipe B (2) toward pipe A (1) so that the connecting ring (4) is embedded in the connecting groove (3). S2. When the connecting ring (4) slides, it will squeeze the block (11). The arc surface (12) allows the connecting ring (4) to press the block (11) into the groove (7). When the groove (14) matches the block (11), the elasticity of the spring (9) allows the block (11) to reset and embed into the groove (14) to lock the connecting ring (4). This makes it difficult for the pipe A (1) and pipe B (2) to loosen after connection. At this time, there is a gap between the pressure block (15) and the block (11). S3. When pipe B (2) needs to be separated from pipe A (1), continue to push pipe B (2) into the connecting groove (3) so that the connecting ring (4) continues to move. At the same time, the positioning block (19) is pushed into the annular groove (18). At this time, the pressure block (15) on the connecting ring (4) contacts the locking block (11) and squeezes the locking block (11) again through the arc surface (12), so that the clockwise side of the locking block (11) is pressed into the sliding groove (7). At this time, rotate pipe A (1) clockwise, and the locking block (11) can be squeezed into the sliding groove (7) smoothly. Rotate until the positioning block (19) matches the separation groove (17) and pull it outward to remove pipe B (2).

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