A highly stable socket-type pipe joint with anchoring function and its installation method

Abstract

The present invention provides a high-stability spigot-and-socket pipe joint with an anchoring function, comprising a socket, a spigot and a retaining ring, wherein the inner wall of the socket is provided with a retaining ring bin and a sealing groove, wherein the retaining ring bin is provided with a retaining ring, wherein the retaining ring is a split structure, wherein the retaining ring is divided into a plurality of retaining rods, wherein the retaining rods are arc-shaped rod bodies, and guide slopes are formed radially inward at the outward ends, and fixing holes are provided on both end surfaces of the retaining rods, wherein elastic support blocks are installed in the fixing holes, and wherein the fixing holes are provided with openings for the elastic support blocks to enter laterally. The new retaining ring of the present invention facilitates the installation and fixation of the rubber support body, while the fixing hole of the old retaining ring structure does not have a step to prevent the support body from falling off, and the support body can easily fall off from the fixing hole; the new structure has higher strength than the old retaining ring, which can easily break from the position of the hole in the middle that fixes the support body.

Description

Technical Field

[0001] The invention belongs to the field of cast pipes, and specifically relates to a high-stability spigot-and-socket pipe interface with an anchoring function and an installation method. Background Art

[0002] The spigot-and-socket pipe joint with the anchor structure having a split stopper has a simple structure and is easy to install, and is widely used in the fields of municipal engineering, oil and gas transportation, etc. Among them, the spigot-and-socket pipe joint with the anchor structure being a stopper (or similar component) is favored by the majority of users because of its convenient construction and not easy to fall off.

[0003] This application is a further optimization based on Patent No. 201310565649.3. The original self-anchoring structure has insufficient compressive strength and is difficult to install. The support body is prone to falling off when encountering strong external impact or after several years of use. The retaining ring is also prone to breaking at the fixing hole in the middle of the support body, posing a major safety hazard. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings existing in the prior art. The present invention provides a high-stability spigot-and-socket pipe interface and an installation method which are easy to install and have a long service life.

[0005] The technical solution adopted by the present invention is: a high-stability socket-type pipe joint with an anchoring function, comprising a socket, a spigot and a retaining ring, the inner wall of the socket is provided with a retaining ring bin and a sealing groove, the retaining ring bin is provided with a retaining ring, the retaining ring is a split structure, the retaining ring is divided into a plurality of retaining rods, the retaining rod is an arc-shaped rod body, the outer wall of the spigot is provided with a circle of protrusions, fixing holes are provided on both ends of the retaining rod, an elastic support block is installed in the fixing hole, and the fixing hole is provided with an opening for allowing the elastic support block to enter laterally.

[0006] Furthermore, the opening is trumpet-shaped; the fixing hole is divided into an outer through hole and an inner through hole from the outer tube wall to the axial center of the tube body; the aperture of the outer through hole is smaller than the aperture of the inner through hole.

[0007] Furthermore, the elastic support block comprises a support portion and a mounting base, the support portion and the mounting base are an integrated structure; the mounting base cooperates with the fixing hole, and the mounting base is interference fit with the opening.

[0008] Furthermore, the support portion includes a first inclined surface, a second inclined surface and a support surface; the first inclined surface is slightly lower than the guide inclined surface of the gear rod along the radial outward direction, and the second inclined surface is gradually higher than the guide inclined surface along the radial outward direction, and the support surface is matched with the inner wall of the retaining ring warehouse.

[0009] Furthermore, a chamfered surface is provided at the end of the gear rod, and a V-shaped installation groove composed of the chamfered surface is formed between adjacent gear rods, and the opening of the V-shaped installation groove faces the outside of the socket.

[0010] Furthermore, the inner wall of the socket is provided with an arc groove that cooperates with the protrusion, and the arc groove is located between the retaining ring magazine and the sealing groove. The retaining ring is provided with a self-anchoring inclined surface that cooperates with the inner wall of the retaining ring magazine and an installation inclined surface that forms an acute angle with the outer wall of the socket during assembly toward the outside of the socket axis.

[0011] Furthermore, the number of the gear levers is 3-6; and the outer wall of the socket is provided with an indicator mark indicating the installation status.

[0012] A method for installing a high-stability spigot-and-socket pipe joint with an anchoring function comprises the following steps:

[0013] A. Clean the socket and install the sealing rubber ring into the sealing groove;

[0014] B. The elastic support block is installed in the fixing hole of the retaining ring, and then installed into the conical retaining ring bin, so that the supporting surface of the elastic support block fits with the inner wall of the retaining ring bin;

[0015] C. Insert one end of the installation card longitudinally into the bottom of the V-shaped installation groove, then rotate the installation card 90° and insert it into the socket, spread the levers so that multiple levers and the installation card form a ring with a radius slightly larger than the original retaining ring, and hang the other end of the installation card on the end of the socket to support the retaining ring;

[0016] D. Apply glue to the socket sealing rubber ring and the end of the plug, and install the plug into the socket;

[0017] E. When the retaining ring is lifted up at the end of the socket, pull out the installation card, and the socket continues to be pushed inward. The sealing rubber ring is lifted up at the end of the socket, and the installation slope on the radial outer bottom surface of the lever facilitates the retaining ring to pass through the outer wall of the socket;

[0018] F. When the protrusion of the socket is engaged between the retaining ring and the arc groove, the socket and the socket realize the plug-in function.

[0019] Furthermore, the installation card is J-shaped, and the installation card includes an inserting portion and a clamping portion.

[0020] Furthermore, step F also includes observing the installation position of the indicator mark, and the indicator mark is installed in place when it reaches the end of the socket, that is, the protrusion on the outer wall of the socket reaches the arc groove. At this time, the retaining ring has passed the protrusion and fallen down and is installed in place.

[0021] The beneficial effects obtained by the present invention are as follows: the new retaining ring of the present invention facilitates the installation and fixation of the rubber support body, while the fixing hole of the old retaining ring structure does not have a step to prevent the support body from falling off, and the support body can easily fall off from the fixing hole; the new structure has higher strength than the old retaining ring, and the old retaining ring can easily break from the position of the hole that fixes the support body in the middle.

[0022] In the present invention, 1. the retaining ring cooperates with the retaining ring warehouse to facilitate the positioning of the retaining ring during installation; 2. fixing holes are set on both sides of the retaining ring dividing line, that is, at the end of the retaining rod, to facilitate the installation of the rubber support body and the overall support; 3. The elastic support block base and the opening have an interference fit, which helps to prevent the elastic support block from falling off; 4. The size of the fixing hole limits the falling off of the elastomer, and also limits it from being squeezed into the fixing hole under pressure; 5. The setting of the first inclined surface of the elastic support block will not block the movement of the retaining ring with the socket, ensure the flexibility of the socket interface, and can produce a certain deflection angle; 6. The setting of the second inclined surface of the elastic support block can limit the retaining ring 7. The two elastic support blocks are arranged in parallel to increase the strength of the elastic body and avoid the failure of a single elastic body, which may cause the overall failure of the retaining ring. 8. The setting of the arc groove can improve the stability of the socket structure. When the socket is inserted deeper, the fulcrum between the corresponding socket and the socket is far away from the end of the socket, which avoids the deflection angle after non-axial overlap between the two adjacent pipes during the socket-spiking process (gravity factors can also cause asymmetry in this part), resulting in a large sealing groove space at one end and a small sealing groove space at the other end, affecting the compression ratio of the sealing rubber ring and reducing the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a partial cross-sectional view of the spigot-and-socket pipe joint of the present invention;

[0024] Figure 2 This is a cross-sectional view of the socket-and-spigot pipe joint of the present invention after installation;

[0025] Figure 3 It is a cross-sectional view during the plugging process of the present invention;

[0026] Figure 4 for Figure 3 Enlarged view of part A in the middle;

[0027] Figure 5 It is a schematic diagram of the structure when the retaining ring of the present invention is connected to the rubber support block;

[0028] Figure 6 It is a schematic diagram of the retaining ring structure of the present invention;

[0029] Figure 7 This is a schematic diagram of the structure of the rubber support body of the present invention;

[0030] Figure 8 This is a schematic diagram of the structure of the installation card of the present invention;

[0031] Fig. 9 It is a schematic diagram of the cross-sectional structure of the socket of the present invention;

[0032] Fig.10 for Figure 5 Enlarged view of middle part B;

[0033] Among them, 1 represents the socket, 2 represents the fixing hole, 3 represents the socket, 4 represents the gear rod, 5 represents the elastic support block, 6 represents the installation card, 7 represents the opening, 8 represents the guide slope, 9 represents the V-shaped installation groove, 10 represents the inclined surface, 11 represents the protrusion, 12 represents the arc groove, 13 represents the sealing rubber ring, 14 represents the installation slope, 15 represents the indicator mark, 31 represents the retaining ring warehouse, 32 represents the sealing groove, 51 represents the support part, 52 represents the installation base, 53 represents the first slope, 54 represents the second slope, 55 represents the support surface, 61 represents the insertion part, and 62 represents the clamping part. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] like Figure 1-10As shown, a high-stability spigot-and-socket pipe interface with an anchoring function comprises a socket 3, a spigot 1 and a retaining ring, wherein the inner wall of the socket 3 is provided with a retaining ring bin 31 and a sealing groove 32, wherein the retaining ring bin 31 is provided with a retaining ring, wherein the retaining ring is a split structure, wherein the retaining ring is divided into a plurality of retaining rods 4, wherein the retaining rods 4 are arc-shaped rod bodies, wherein the outer wall of the spigot 1 is provided with a circle of protrusions 11, wherein both ends of the retaining rods 4 are provided with fixing holes 2, wherein elastic support blocks 5 are installed in the fixing holes 2, wherein the fixing holes 2 are provided with openings 7 for the elastic support blocks 5 to enter laterally. The openings 7 are trumpet-shaped; wherein the fixing holes 2 are divided into an outer through hole and an inner through hole from the outer pipe wall to the axial direction of the pipe body; wherein the aperture of the outer through hole is smaller than the aperture of the inner through hole. The elastic support block 5 includes a support portion 51 and a mounting base 52, and the support portion 51 and the mounting base 52 are an integrated structure; the mounting base 52 cooperates with the fixing hole 2, and the mounting base 52 is interference fit with the opening 7. The support portion 51 includes a first inclined surface 53, a second inclined surface 54 and a support surface 55; the first inclined surface 53 is slightly lower than the guide inclined surface 8 of the gear rod 4 along the radial outward, and the second inclined surface 54 is gradually higher than the guide inclined surface 8 along the radial outward, and the support surface 55 is in line with the inner wall of the retaining ring warehouse 31. The end of the gear rod 4 is provided with a chamfered surface, and a V-shaped mounting groove 9 composed of chamfered surfaces is formed between adjacent gear rods 4, and the V-shaped mounting groove 9 opens toward the outside of the socket 3. The inner wall of the socket 3 is provided with an arc groove 12 matched with the protrusion 11, and the arc groove 12 is located between the retaining ring bin 31 and the sealing groove 32. The retaining ring is provided with a self-anchoring inclined surface 8 matched with the inner wall of the retaining ring bin 31 and an installation inclined surface 14 which forms an acute angle with the outer wall of the socket 1 during the assembly process, facing the outer side of the axis of the socket 3. The number of the shift rods 4 is 3-6; the outer wall of the socket 1 is provided with an indication mark 15 indicating the installation status.

[0036] In specific implementation: A method for installing a high-stability spigot-and-socket pipe joint with an anchoring function comprises the following steps:

[0037] A. Clean the socket 3 and install the sealing rubber ring 13 into the sealing groove 32;

[0038] B. The elastic support block 5 is installed in the fixing hole of the retaining ring, and the installation part of the elastic support block 5 is pushed into the opening 7 of the retaining rod 4. Due to the interference fit between the installation base 52 and the opening 7 and the design that the aperture of the outer through hole of the fixing hole 2 is smaller than the aperture of the inner through hole, the elastic support block 5 is firmly installed in the fixing hole, and then it is installed in the conical retaining ring warehouse 31. The supporting surface 55 of the elastic support block 5 fits with the inner wall of the retaining ring warehouse 31. The total radial height of the elastic support block 5 and the retaining rod 4 is equal to or slightly larger than the difference between the maximum inner diameter of the socket 3 and the outer diameter of the socket 1, so that the entire retaining ring and the elastic support block 5 are more firmly engaged in the retaining ring warehouse 31;

[0039] C. Insert the insertion portion 61 of the J-shaped mounting card 6 longitudinally into the bottom of the V-shaped mounting groove 9. The inclined surface design makes it smoother when inserted. Then rotate the mounting card 6 90°. The clamping portion 62 of the mounting card 6 is hung on the end of the socket 3 to support the retaining ring. The split retaining ring will not fall off.

[0040] D. Apply glue to the sealing rubber ring 13 of the socket 3 and the outer wall of the end of the socket 1, and install the socket 1 into the socket 3;

[0041] E. When the retaining ring is lifted up at the end of the socket 1, the installation card 6 is pulled out, and the socket continues to be pushed inward. The sealing rubber ring 7 is lifted up at the end of the socket 1. The inclined surface 10 of the radial outer bottom surface of the lever 4 facilitates the retaining ring to pass through the outer wall protrusion 11 of the socket 1, and the whole installation process is smoother and less stuck;

[0042] F. Observe the installation position of the indicator mark 15. The indicator mark 15 reaches the end of the socket 3 and is installed in place, that is, the protrusion 11 of the outer wall of the socket 1 reaches the arc groove 12. At this time, the retaining ring has passed over the protrusion 11 and fallen; the protrusion 11 of the socket 1 is engaged between the retaining ring and the arc groove 12, and the socket 1 and the socket 3 realize the plug-in function.

[0043] During the insertion and installation process, the inflection point of the first slope 53 and the second slope 54 of the elastic support block 5 is on the inner side of the guide slope 8, so the second slope 54 is slightly lower than the guide slope 8 near the first slope 53, and slightly higher than the guide slope 8 at the end far from the first slope 53. In addition, during the assembly process, because the elastomer has a certain compressibility, the rear end of the second slope 54 will tilt backward and be compressed backward, and the front end of the second slope 54 will be forced to bounce up. The second slope 54 will eventually form an inclined surface with the first slope 53 that cooperates with the retaining ring warehouse 31. The inclined surface will gradually become parallel to the self-anchoring surface of the socket 3. The elastic support block 5 generates an extrusion force in the radial direction of the cast pipe body to assist the retaining ring and the protrusion 11 of the socket 1 to complete the anchoring function and ensure the self-anchoring effect.

Claims

1. A high-stability spigot-and-socket pipe joint with an anchoring function, comprising a socket (3), a spigot (1) and a retaining ring, wherein the inner wall of the socket (3) is provided with a retaining ring bin (31) and a sealing groove (32), wherein the retaining ring bin (31) is provided with a retaining ring, wherein the retaining ring is a split structure, wherein the retaining ring is divided into a plurality of retaining rods (4), wherein the retaining rods (4) are arc-shaped rod bodies, and wherein the outer wall of the spigot (1) is provided with a circle of protrusions (11), wherein the characteristics are as follows: Both ends of the shift rod (4) are provided with fixing holes (2), an elastic support block (5) is installed in the fixing hole (2), and the fixing hole (2) is provided with an opening (7) for allowing the elastic support block (5) to enter laterally; The opening (7) is trumpet-shaped; the fixing hole (2) is divided into an outer through hole and an inner through hole from the outer tube wall to the axial center of the tube body; the aperture of the outer through hole is smaller than the aperture of the inner through hole; The elastic support block (5) comprises a support portion (51) and a mounting base (52); the support portion (51) and the mounting base (52) are an integrated structure; the mounting base (52) cooperates with the fixing hole (2), and the mounting base (52) is interference-fitted with the opening (7).

2. According to claim 1, a high-stability spigot-and-socket pipe joint with an anchoring function, characterized in that: The support portion (51) comprises a first inclined surface (53), a second inclined surface (54) and a support surface (55); the first inclined surface (53) is slightly lower than the guide inclined surface (8) of the retaining rod (4) when extending radially outward, the second inclined surface (54) is gradually higher than the guide inclined surface (8) when extending radially outward, and the support surface (55) is in contact with the inner wall of the retaining ring chamber (31).

3. According to claim 1, a high-stability spigot-and-socket pipe joint with an anchoring function, characterized in that: The end of the lever (4) is provided with a chamfered surface, and a V-shaped installation groove (9) formed by the chamfered surface is formed between adjacent levers (4), and the opening of the V-shaped installation groove (9) faces the outside of the socket (3).

4. According to claim 1, a high-stability spigot-and-socket pipe joint with an anchoring function, characterized in that: The inner wall of the socket (3) is provided with an arc groove (12) matching with the protrusion (11), and the arc groove (12) is located between the retaining ring bin (31) and the sealing groove (32). The retaining ring is provided with a guiding inclined surface (8) matching with the inner wall of the retaining ring bin (31) and a mounting inclined surface (14) forming an acute angle with the outer wall of the socket (1) during assembly, facing the outer side of the axis of the socket (3).

5. According to claim 1, a high-stability spigot-and-socket pipe joint with an anchoring function, characterized in that: The number of the shift levers (4) is 3-6; and an indication mark (15) indicating the installation status is provided on the outer wall of the socket (1).

6. A method for installing a high-stability spigot-and-socket pipe joint with an anchoring function, characterized in that: The high-stability spigot-and-socket pipe joint with an anchoring function comprises a socket (3), a spigot (1) and a retaining ring, the inner wall of the socket (3) being provided with a retaining ring bin (31) and a sealing groove (32), the retaining ring bin (31) being provided with a retaining ring, the retaining ring being a split structure, the retaining ring being divided into a plurality of retaining rods (4), the retaining rods (4) being arc-shaped rod bodies, the outer wall of the spigot (1) being provided with a circle of protrusions (11), both ends of the retaining rod (4) being provided with fixing holes (2), the fixing holes (2) being provided with elastic support blocks (5), the fixing holes (2) being provided with openings (7) for allowing the elastic support blocks (5) to enter laterally; The opening (7) is trumpet-shaped; the fixing hole (2) is divided into an outer through hole and an inner through hole from the outer tube wall to the axial center of the tube body; the aperture of the outer through hole is smaller than the aperture of the inner through hole; The elastic support block (5) comprises a support portion (51) and a mounting base (52), wherein the support portion (51) and the mounting base (52) are an integrated structure; the mounting base (52) cooperates with the fixing hole (2), and the mounting base (52) is interference-fitted with the opening (7); The end of the lever (4) is provided with a chamfered surface, and a V-shaped mounting groove (9) formed by the chamfered surface is formed between adjacent levers (4), and the opening of the V-shaped mounting groove (9) faces the outside of the socket (3); It also includes: a mounting card (6); the inner wall of the socket (3) is provided with an arc-shaped groove (12) matching with the protrusion (11), and the arc-shaped groove (12) is located between the retaining ring bin (31) and the sealing groove (32); The installation method comprises the following steps: A. Clean the socket (3) and install the sealing rubber ring (13) into the sealing groove (32); B. The elastic support block (5) is installed in the fixing hole of the retaining ring, and then installed in the conical retaining ring chamber (31), so that the supporting surface (55) of the elastic support block (5) fits with the inner wall of the retaining ring chamber (31); C. Insert one end of the mounting card (6) longitudinally into the bottom of the V-shaped mounting groove (9), then rotate the mounting card (6) 90° and insert it into the socket (3), spread the stopper rods (4), so that the multiple stopper rods (4) and the mounting card (6) form a circular ring with a radius slightly larger than the original stopper ring, and hang the other end of the mounting card (6) on the end of the socket (3) to support the stopper ring; D. Apply glue to the sealing rubber ring (13) of the socket (3) and the end of the plug (1), and install the plug (1) into the socket (3); E. When the end of the socket (1) lifts up the retaining ring, the installation card (6) is pulled out, and the socket continues to be pushed inward. The end of the socket (1) lifts up the sealing rubber ring (13), and the installation inclined surface (14) on the radial outer bottom surface of the retaining rod (4) facilitates the retaining ring to pass through the protrusion (11) on the outer wall of the socket (1); F. When the protrusion (11) of the socket (1) is engaged in the arc groove (12), the socket (1) and the socket (3) realize the plug-in function.

7. The installation method of a high-stability spigot-and-socket pipe joint with an anchoring function according to claim 6, characterized in that: The installation card (6) is J-shaped, and comprises an insertion portion (61) and a clamping portion (62).

8. The installation method of a high-stability spigot-and-socket pipe joint with an anchoring function according to claim 6, characterized in that: The step F also includes observing the installation position of the indicator mark (15), and the indicator mark reaches the end of the socket (3) and is installed in place, that is, the protrusion (11) on the outer wall of the socket (1) reaches the arc groove (12), at which time the retaining ring has passed the protrusion (11) and fallen down and is installed in place.

Images