Cement pipe joint

Abstract

The utility model discloses a cement pipe joint, which belongs to the technical field of cement pipe connection, realizes the butt joint precision of a main joint and an auxiliary joint and reduces manual adjustment through the physical guide of a guide strip and a guide groove and the forced limit of an angle calibration block and an angle calibration groove. The self-adaptive sealing ring in the annular sealing cavity forms dynamic pressure compensation to ensure no leakage; the main joint and the auxiliary joint are quickly assembled through the thread part I and the thread part II to meet the requirements of different pipe diameters, so that the inventory cost is reduced; through the design of a circular mounting cylinder and a fastening screw rod, the cement pipe body can be fixed by the joint body, and the connection stability is guaranteed; according to the cement pipe joint, the problem that a traditional cement pipe joint is poor in sealing performance can be solved, tight and reliable sealing connection between cement pipes is achieved, the durability of a pipeline system is improved, and the cement pipe joint has the advantages that the problem that the traditional cement pipe joint is poor in sealing performance is solved, tight and reliable sealing connection between cement pipes is achieved, and the durability of the pipeline system is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to cement pipe connecting technical field, more specifically, it relates to a cement pipe joint. BACKGROUND

[0002] In all kinds of infrastructure construction, cement pipe becomes widely used pipeline material by virtue of its high strength, corrosion resistance, low cost and other advantages.

[0003] And the existing cement pipe adopts flat mouth joint, although the gap is filled by cement mortar, but due to the lack of elasticity of cement mortar after solidification, cracks are prone to produce when the pipeline is deformed under stress, thereby losing sealing effect. It is difficult to guarantee the reliability and stability of sealing, not only will cause water resource waste, environmental pollution, but also can affect the normal operation of pipeline system, increase the later maintenance cost. UTILITY MODEL CONTENT

[0004] In view of the deficiencies in the prior art, the utility model aims at providing a cement pipe joint, which has the advantages of solving the problem of poor sealing performance of traditional cement pipe joints, realizing tight and reliable sealing connection between cement pipes and improving the durability of pipeline system.

[0005] To achieve the above object, the utility model provides the following technical scheme:

[0006] A cement pipe joint, comprising a cement pipe body and a joint body, the joint body comprising a main joint and an auxiliary joint, the side end face of the main joint and the auxiliary joint in contact with each other is respectively provided with a socket and a spigot, the inner wall of the socket is provided with a plurality of guide strips, and the outer wall of the spigot is provided with a guide groove matched with the guide strips.

[0007] The inner wall of the socket is circumferentially uniformly distributed with a plurality of angle calibration blocks, and the outer wall of the spigot is correspondingly provided with an angle calibration groove matched with the angle calibration blocks.

[0008] The inner wall of the socket and the outer wall of the spigot are provided with an annular sealing cavity, and a self-adaptive sealing ring is embedded in the sealing cavity.

[0009] The outer wall of the end of the main joint and the auxiliary joint close to each other is respectively and symmetrically provided with a plurality of threaded portions one and threaded portions two.

[0010] The side end face of the main joint and the auxiliary joint away from each other is fixedly installed with a circular mounting cylinder, the inner diameter of the circular mounting cylinder is same with the inner diameter of the main joint and the auxiliary joint, and the outer peripheral wall of the circular mounting cylinder is threadedly connected with a plurality of fastening screws.

[0011] According to the advantages of the scheme, at least the physical guidance of the guide strip and the guide groove, the forced limiting of the angle calibration block and the angle calibration groove, the docking precision of the main joint and the auxiliary joint, the reduction of manual adjustment, the dynamic pressure compensation of the adaptive sealing ring in the annular sealing cavity, the guarantee of no leakage, the quick assembly of the main joint and the auxiliary joint through the threaded parts one and two, the adaptation to different pipe diameter requirements, the reduction of inventory cost, the design of the circular mounting cylinder and the fastening screw rod, the fixation of the joint body to the cement pipe body, the stability of the connection, the solution to the poor sealing performance of the traditional cement pipe joint, the tight and reliable sealing connection between the cement pipes, and the durability of the pipeline system are realized.

[0012] The utility model further sets up: angle calibration block is trapezoidal boss.

[0013] According to the advantages of the scheme, at least the shape design of the trapezoidal boss makes it easier to insert the angle calibration groove structure, and the accurate angle control is easier to realize in the processing process, the docking angle is forced to correct, the axial deviation is limited, and the stability of the structure is enhanced.

[0014] The utility model further sets up: adaptive sealing ring is stepped multilip structure.

[0015] According to the advantages of the scheme, at least the stepped multilip structure can effectively improve the sealing performance through the synergies of multiple sealing lips, can continue to play a key role in the case of plane sealing failure, and prevent leakage from occurring.

[0016] The utility model further sets up: the outer wall of cement pipe body both ends is equipped with annular positioning circular groove.

[0017] According to the advantages of the scheme, at least through the positioning circular groove, the cement pipe body can be well positioned, the axial sliding of the cement pipe body in the inner wall of the main joint and the auxiliary joint during installation is prevented, the circumferentially distributed positioning circular grooves can also disperse the locking force of the screw rod, and local crushing of the cement pipe body wall is avoided.

[0018] The utility model further sets up: the end of fastening screw rod is connected with rubber gasket.

[0019] According to the advantages of the scheme, at least through the rubber gasket, the elastic deformation of the rubber gasket compensates for the loss of pre-tightening force caused by vibration, prevents the fastening screw rod from retracting, avoids direct contact of the fastening screw rod with the cement pipe body, reduces the abrasion and stress concentration on the surface of the cement pipe body, and absorbs high-frequency vibration caused by water impact, reducing noise.

[0020] The utility model further sets up: the inner wall of main joint and auxiliary joint all is equipped with installation groove, be equipped with round rubber sealing ring in the installation groove.

[0021] According to the advantages of this scheme at least in: by setting installation groove and round rubber sealing ring, installation groove provides fixed installation position for round rubber sealing ring, ensure that sealing ring is even when under pressure and is pasted to the inner wall of main joint and auxiliary joint, fill the gap because of processing tolerance or slight deformation. The elasticity of rubber material can adapt to the internal pressure fluctuation of pipeline, such as water flow impact, temperature change, still keep sealing under high pressure, prevent liquid or gas leakage.

[0022] Summarized above, the utility model has at least the following advantages:

[0023] 1, by setting the positioning circular groove, can good to the cement pipe body is positioned, prevent the cement pipe body from axial sliding in the inner wall of main joint and auxiliary joint when installing; The circumferential uniform distribution positioning circular groove still can disperse screw locking force, avoid the local crushing of cement pipe body wall;

[0024] 2, by setting rubber pad, the elastic deformation of rubber pad compensates the loss of pre-tightening force caused by vibration, prevents the back of solid screw; Still can avoid solid screw directly contact cement pipe body, reduce the abrasion and stress concentration of cement pipe body surface; And absorb high-frequency vibration caused by water flow impact, reduce noise;

[0025] 3, by setting installation groove and round rubber sealing ring, installation groove provides fixed installation position for round rubber sealing ring, ensure that sealing ring is even when under pressure and is pasted to the inner wall of main joint and auxiliary joint, fill the gap because of processing tolerance or slight deformation. The elasticity of rubber material can adapt to the internal pressure fluctuation of pipeline, such as water flow impact, temperature change, still keep sealing under high pressure, prevent liquid or gas leakage. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is the overall schematic view of one preferred embodiment in the utility model;

[0027] Figure 2 It is the overall sectional view schematic diagram of one preferred embodiment in the utility model;

[0028] Figure 3 It is the explosion schematic diagram of main joint and auxiliary joint in the utility model;

[0029] Figure 4 It is the explosion schematic diagram of main joint and auxiliary joint in the utility model;

[0030] Figure 5 It is the main joint and auxiliary joint cooperation overall schematic diagram of one preferred embodiment in the utility model;

[0031] Figure 6 This is a cross-sectional schematic diagram of the main connector and auxiliary connector of a preferred embodiment of the present invention.

[0032] Reference numerals: 1. Cement pipe body; 2. Joint body; 201. Main joint; 202. Auxiliary joint; 3. Socket; 4. Spiral; 5. Guide strip; 6. Guide groove; 7. Angle calibration block; 8. Angle calibration groove; 9. Annular sealing cavity; 10. Adaptive sealing ring; 11. Threaded part one; 12. Threaded part two; 13. Circular mounting cylinder; 14. Fastening screw; 15. Annular positioning groove; 16. Rubber gasket; 17. Mounting groove; 18. Circular rubber sealing ring. Detailed Implementation

[0033] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0034] A type of cement pipe joint, such as Figure 1 As shown, the device includes a cement pipe body 1 and a connector body 2. The connector body 2 includes a main connector 201 and an auxiliary connector 202. The end faces of the main connector 201 and the auxiliary connector 202 that are in contact with each other are respectively provided with sockets 3 (see reference). Figure 3 ) and socket 4 (reference) Figure 3 The inner wall of the socket 3 is provided with several guide strips 5 (see reference). Figure 3 The outer wall of the socket 4 is provided with a guide groove 6 that matches the guide strip 5 (see reference). Figure 4 );

[0035] Several angle calibration blocks 7 are evenly distributed circumferentially on the inner wall of socket 3 (for reference). Figure 3 The outer wall of the socket 4 is provided with an angle calibration groove 8 that matches the angle calibration block 7, and an annular sealing cavity 9 is provided between the inner wall of the socket 3 and the outer wall of the socket 4 (see reference). Figure 6 The sealing cavity is embedded with an adaptive sealing ring 10 (reference). Figure 2), the outer wall of the proximal end of the main joint 201 and the auxiliary joint 202 is respectively symmetrically provided with a plurality of threaded portions one 11 and threaded portions two 12, and the side end face of the main joint 201 and the auxiliary joint 202 away from each other is fixedly installed with a circular mounting cylinder 13, the inner diameter of the circular mounting cylinder 13 is the same as the inner diameter of the main joint 201 and the auxiliary joint 202, and the outer peripheral wall of the circular mounting cylinder 13 is threadedly connected with a plurality of fastening screws 14. The physical guidance of the guide strip 5 and the guide groove 6, combined with the forced limiting of the angle calibration block 7 and the angle calibration groove 8, realizes the butt joint precision of the main joint 201 and the auxiliary joint 202, reduces manual adjustment; the self-adaptive sealing ring 10 in the annular sealing cavity 9 forms dynamic pressure compensation, ensuring no leakage; the main joint 201 and the auxiliary joint 202 are quickly assembled through the threaded portion one 11 and the threaded portion two 12, which adapts to different pipe diameter requirements and reduces inventory costs; the design of the circular mounting cylinder 13 and the fastening screw 14 can fix the joint body 2 to the cement pipe body 1, ensuring the connection stability; it can solve the problem of poor sealing performance of traditional cement pipe joints, realize the tight and reliable sealing connection between the cement pipes, and improve the durability of the pipeline system.

[0036] As shown in Figure 3 , the angle calibration block 7 is a trapezoidal boss. The shape design of the trapezoidal boss makes it easier to insert into the angle calibration groove 8 structure, and it is easier to achieve accurate angle control during processing, forcibly correct the butt joint angle, limit the axial offset, and enhance the stability of the structure.

[0037] As shown in Figure 2 , the self-adaptive sealing ring 10 is a stepped multi-lip structure. The stepped multi-lip structure can effectively improve the sealing performance through the synergistic effect of multiple sealing lips. In the case of plane sealing failure, it can continue to play a key role by relying on the annular seal, thereby preventing leakage.

[0038] As shown in Figure 1 , the outer wall of both ends of the cement pipe body 1 is provided with an annular positioning circular groove 15. By providing the annular positioning circular groove 15, the cement pipe body 1 can be well positioned to prevent the cement pipe body 1 from sliding axially in the inner wall of the main joint 201 and the auxiliary joint 202 during installation; the circumferentially distributed annular positioning circular grooves 15 can also disperse the locking force of the screw, avoiding local crushing of the wall of the cement pipe body 1.

[0039] As shown in Figure 2 , the end of the fastening screw 14 is threadedly connected with a rubber gasket 16. By providing the rubber gasket 16, the elastic deformation of the rubber gasket 16 compensates for the loss of pre-tightening force caused by vibration, preventing the fastening screw 14 from retracting; it can also avoid direct contact between the fastening screw 14 and the cement pipe body 1, reducing the wear and stress concentration on the surface of the cement pipe body 1; and it can absorb high-frequency vibration caused by water impact and reduce noise.

[0040] AsFigure 2 As shown, the inner wall of the main joint 201 and the auxiliary joint 202 is provided with a mounting groove 17, and a circular rubber sealing ring 18 is arranged in the mounting groove 17. By arranging the mounting groove 17 and the circular rubber sealing ring 18, the mounting groove 17 provides a fixed mounting position for the circular rubber sealing ring 18, and ensures that the circular rubber sealing ring 18 uniformly adheres to the inner wall of the main joint 201 and the auxiliary joint 202 when under pressure, and fills the gap caused by the machining tolerance or slight deformation. The elasticity of the rubber material enables it to adapt to the internal pressure fluctuations of the pipeline, such as water flow impact and temperature change, and still maintain sealing under high pressure to prevent liquid or gas leakage.

[0041] The working process and beneficial effects of the utility model are as follows: firstly, the circular mounting cylinder 13 and the cement pipe body 1 provided with the main joint 201 and the auxiliary joint 202 are connected, then the cement pipe body 1 is adjusted, so that the annular positioning circular groove 15 provided with the outer wall of the cement pipe body 1 is aligned with the clamping screw 14, and then the clamping screw 14 is tightened to fix the cement pipe body 1; the guide groove 6 of the spigot 4 is aligned with the guide strip 5 of the socket 3, and the angle calibration block 7 is preliminarily aligned with the angle calibration groove 8. The spigot 4 is pushed along the guide strip 5, and the angle calibration block 7 forcibly corrects the butt joint angle until the spigot 4 is completely embedded in the socket 3; the threaded portion one 11 and the threaded portion two 12 are fixed by bolts, and the fixed connection between the main joint 201 and the auxiliary joint 202 is completed. When the joint body 2 needs to be maintained and disassembled, the bolt is rotated in the opposite direction to come out of the threaded portion one 11 and the threaded portion two 12, and the spigot 4 is pulled out in the opposite direction along the guide strip 5.

[0042] The above is only a preferred embodiment of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement, improvement, etc. within the design concept of the utility model should be included in the protection scope of the utility model.

Claims

1. A cement joint comprising a cement body (1) and a joint body (2), characterized in that: The joint body (2) comprises a main joint (201) and an auxiliary joint (202), the side end faces of the main joint (201) and the auxiliary joint (202) in contact with each other are respectively provided with a socket (3) and a spigot (4), the inner wall of the socket (3) is provided with a plurality of guide strips (5), and the outer wall of the spigot (4) is provided with a guide groove (6) matched with the guide strips (5); The inner wall of the socket (3) is circumferentially uniformly distributed with a plurality of angle calibration blocks (7), and the outer wall of the spigot (4) is correspondingly provided with an angle calibration groove (8) adapted to the angle calibration blocks (7); The inner wall of the socket (3) and the outer wall of the spigot (4) are provided with an annular sealing cavity (9), and a self-adaptive sealing ring (10) is embedded in the sealing cavity; The outer walls of the mutually close ends of the main joint (201) and the auxiliary joint (202) are respectively and symmetrically provided with a plurality of threaded portions one (11) and threaded portions two (12); The side end faces of the mutually distant ends of the main joint (201) and the auxiliary joint (202) are both fixedly installed with a circular mounting cylinder (13), the inner diameter of the circular mounting cylinder (13) is the same as the inner diameter of the main joint (201) and the auxiliary joint (202), and the outer peripheral wall of the circular mounting cylinder (13) is threadedly connected with a plurality of fastening screws (14).

2. A cement joint as defined in claim 1, characterized in that: The angle calibration block (7) is a trapezoidal boss.

3. A cement joint as defined in claim 1, wherein: The self-adaptive sealing ring (10) is a stepped multi-lip structure.

4. A cement joint as defined in claim 1, wherein: The outer walls of both ends of the cement pipe body (1) are provided with annular positioning circular grooves (15).

5. A cement joint as defined in claim 1, wherein: The distal end of the fastening screw (14) is threadedly connected with a rubber gasket (16).

6. A cement joint as defined in claim 1, wherein: The inner walls of the main joint (201) and the auxiliary joint (202) are both provided with mounting grooves (17), and the mounting grooves (17) are provided with circular rubber sealing rings (18).

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