Squeezing joint with firm connection

Abstract

The utility model provides an extrusion joint firm in connection, which comprises a shell, an extrusion ring and a bushing, the shell is a hollow cylinder, the outer side wall of the shell is provided with an outer step, the inner side wall of the shell is provided with an inner step, the inner step is arranged in the middle of the shell, and the shell is divided into two sections by the inner step. The bushings are connected into the openings in the two ends of the shell respectively, the bushings abut against the inner steps, gaps are formed between the bushings and the inner wall of the shell, and the pipe fittings at the two ends stretch into the gaps. The extrusion ring sleeves the outer side of the shell to form a clamping part, the extrusion ring abuts against the outer step, and the extrusion ring extrudes the two ends of the shell. According to the extrusion joint, the outer step and the inner step provide a reference for installation, connection convenience is improved, professional requirements for operators are reduced, meanwhile, the connection stability and the installation stability of the extrusion joint are high, the sealing performance is good, and the connection part of a pipeline can be protected.

Description

TECHNICAL FIELD

[0001] The utility model belongs to pipeline connecting piece technical field, concretely relates to a kind of extrusion joint of firm connection. BACKGROUND

[0002] Extrusion joint is a kind of mechanical joint that makes connecting piece produce plastic deformation by extrusion, and is tightly connected with connected pipe, which can withstand large tension, pressure and shear force, and can ensure that the connection part will not be easily damaged during use, while the installation is relatively simple, without complex equipment and technology, saving construction time and labor cost. However, in the case of pipeline connection, its sealing and connection strength cannot meet the demand of high-pressure sealing connection, and the installation process requires special extrusion equipment, which is high in purchase, maintenance and maintenance cost, and requires high installation level of operating personnel, so the connection quality is difficult to guarantee.

[0003] Therefore, the above problems need to be solved. INVENTION CONTENT

[0004] The utility model aims at overcoming the above-mentioned defects, and provides an extrusion joint with firm connection, high connection strength, strong sealing, convenient connection, no need for professional training of installation personnel, and high connection stability and installation stability.

[0005] Technical scheme: in order to achieve the above-mentioned purpose, the utility model provides an extrusion joint with firm connection, which comprises a shell, an extrusion ring and a bushing. The shell is a hollow cylinder, the outer side wall of the shell is provided with an outer step, the inner side wall of the shell is provided with an inner step, the inner step is arranged in the middle part of the shell, and the inner step divides the shell into two sections. The bushing is connected to the opening at both ends of the shell, the bushing and the inner step form abutment, the bushing and the inner wall of the shell form a gap, and the pipe at both ends extends into the gap. The extrusion ring is sleeved into the outer side of the shell to form a clamping part, the extrusion ring and the outer step form abutment, and the extrusion ring extrudes the two ends of the shell. When connecting the pipeline, first, the bushing is inserted into the opening of the pipeline to be connected, then the extrusion ring is sleeved outside the pipeline, then the pipeline is inserted into the opening at both ends of the shell until the bushing and the inner step abut, then the extrusion ring is moved towards the outer step until the extrusion ring and the outer step abut, and the extrusion ring extrudes the opening at both ends of the shell, so that the opening at both ends of the shell is plastically deformed towards the center of the shell, and then the pipeline is extruded and fixed between the inner side wall of the shell and the outer side wall of the bushing, so as to connect the pipeline. The utility model sets the outer step and the inner step as a reference for installation, improves the convenience of connection, reduces the professional requirements for operating personnel, and has high connection stability and installation stability, which can protect the connected part of the pipeline.

[0006] Further, the above-mentioned firmly connected extrusion joint, the outer side wall of the shell at both ends is respectively provided with a sliding part, and the inner side wall of the extrusion ring is provided with an extrusion part. The cross-sectional diameter of the extrusion part is smaller than that of the sliding part. During the movement of the extrusion ring to the outer step direction, the extrusion part moves along the sliding part and extrudes the sliding part, and the sliding part uniformly deforms plastically, and the pipeline is uniformly extruded, so that the pipeline is sealingly connected to the shell and the bushing, and the sealing of the connection is improved. At the same time, the cross-sectional shape of the extrusion part and the sliding part is correspondingly arranged, which can avoid the sliding of the extrusion ring and improve the stability of the connection.

[0007] Further, the above-mentioned firmly connected extrusion joint, the sliding part includes a first guide surface, an inclined surface and a second guide surface, the cross-sectional diameter of the first guide surface is smaller than that of the second guide surface, and the inclined surface is transitionally connected to the first guide surface and the second guide surface. The extrusion part includes a first extrusion plane, a guide surface and a second extrusion plane, which are sequentially arranged along the axis direction of the extrusion ring, the guide surface is transitionally connected to the first extrusion plane, the guide surface and the second extrusion plane, and the cross-sectional diameter of the first extrusion plane is smaller than that of the second extrusion plane. The inclined surface guides the extrusion ring to be sleeved into the second guide surface, reducing the installation difficulty.

[0008] Further, the above-mentioned firmly connected extrusion joint, the shell is provided with a locking groove near the outer step, and the extrusion ring is provided with a locking boss near one end of the outer step. When the shell and the extrusion ring are sleeved, the locking boss is clamped in the locking groove. The locking boss and the locking groove are arranged to improve the connection strength of the shell and the extrusion ring, avoid the disengagement of the extrusion ring caused by pipeline vibration or excessive pressure, and improve the connection strength.

[0009] Further, the above-mentioned firmly connected extrusion joint, the bushing is provided with a limiting boss near one end of the inner step, and the limiting boss abuts against the inner step. The outer side wall of the bushing is provided with a first clamping groove, and the first clamping groove is provided with two or more. When the extrusion ring extrudes the shell and then extrudes the pipeline, the pipeline deforms plastically, and the pipeline is extruded into the first clamping groove, improving the engagement force of the pipeline and the bushing, improving the connection strength, and ensuring the connection stability.

[0010] Further, the above-mentioned firmly connected extrusion joint, the inner side wall of the shell is provided with a second clamping groove, and the second clamping groove is provided with two or more. The width of the second clamping groove is greater than that of the first clamping groove. The shell is extruded by the extrusion ring, and the shell deforms plastically, thereby extruding the pipeline, and the pipeline deforms plastically, and part of the pipeline is embedded in the second clamping groove, improving the engagement force of the pipeline and the shell, improving the connection strength, and ensuring the connection stability.

[0011] Further, the first clamping groove and the second clamping groove are staggered, so that the pipeline is plastically deformed in a wave shape, the pipeline is embedded into the first clamping groove and the second clamping groove respectively, the connection strength and the connection stability of the pipeline are improved, and the connection sealing property of the pipeline and the extrusion joint is improved.

[0012] Further, the first clamping groove and the second clamping groove are staggered, so that the pipeline is plastically deformed in a wave shape, the pipeline is embedded into the first clamping groove and the second clamping groove respectively, the connection strength and the connection stability of the pipeline are improved, and the connection sealing property of the pipeline and the extrusion joint is improved.

[0013] Further, the first clamping groove and the second clamping groove are staggered, so that the pipeline is plastically deformed in a wave shape, the pipeline is embedded into the first clamping groove and the second clamping groove respectively, the connection strength and the connection stability of the pipeline are improved, and the connection sealing property of the pipeline and the extrusion joint is improved.

[0014] The extrusion joint has the following beneficial effects: the extrusion joint provides a reference for installation through the outer step and the inner step, the connection convenience is improved, the professional requirement for the operator is reduced, the connection stability and the installation stability of the extrusion joint are high, the connection part of the pipeline is protected, the locking boss and the locking groove are arranged, the connection strength of the shell and the extrusion ring is improved, the extrusion ring is prevented from being separated due to pipeline vibration or excessive pressure, and the connection strength is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a front view of the extrusion joint;

[0016] Figure 2 is Figure 1 the A-A sectional view shown in the figure;

[0017] Figure 3 is Figure 2 the explosion diagram.

[0018] In the figure: 1, shell, 11, outer step, 12, inner step, 13, sliding part, 131, first guide surface, 132, inclined surface, 133, second guide surface, 14, locking groove, 15, second clamping groove, 21, extrusion part, 211, first extrusion plane, 212, guide surface, 213, second extrusion plane, 22, locking boss, 2, extrusion ring, 3, bushing, 31, limiting boss, 32, first clamping groove, 33, guide inclined surface. DETAILED DESCRIPTION

[0019] Example 1

[0020] As Figures 1-2 shown in a kind of firm extrusion joint, including shell 1, extrusion ring 2 and bushing 3, shell 1 is provided as hollow cylinder, shell 1 outer side wall is equipped with outer step 11, shell 1 inner side wall is equipped with inner step 12, inner step 12 is located in the middle of shell 1, inner step 12 will shell 1 be divided into two sections. Bushing 3 is connected in the opening of shell 1 two ends respectively, bushing 3 and inner step 12 form abutment, bushing 3 and shell 1 inner wall form gap, two end pipe is inserted into gap. Extrusion ring 2 is sleeved into the outer side of shell 1 and forms clamping part, extrusion ring 2 and outer step 11 form abutment, extrusion ring 2 forms extrusion to the two ends of shell 1. Extrusion ring 2 and bushing 3 material hardness is greater than the material hardness of shell 1.

[0021] As Figure 3The shown firm connection extrusion joint, the outer side wall of the shell 1 is respectively provided with a sliding part 13, and the inner side wall of the extrusion ring 2 is provided with an extrusion part 21. The extrusion part 21 is provided with a smaller cross-sectional diameter than the cross-sectional diameter of the sliding part 13. The sliding part 13 comprises a first guide surface 131, an inclined surface 132 and a second guide surface 133, the cross-sectional diameter of the first guide surface 131 is smaller than the cross-sectional diameter of the second guide surface 133, and the inclined surface 132 is transitionally connected to the first guide surface 131 and the second guide surface 133. The extrusion part 21 comprises a first extrusion plane 211, a guide surface 212 and a second extrusion plane 213, which are sequentially arranged along the axis direction of the extrusion ring 2, the guide surface 212 is transitionally connected to the first extrusion plane 211, the guide surface 212 and the second extrusion plane 213, and the cross-sectional diameter of the first extrusion plane 211 is smaller than the cross-sectional diameter of the second extrusion plane 213. The shell 1 is provided with a locking groove 14 near the outer step 11, and the extrusion ring 2 is provided with a locking boss 22 near one end of the outer step 11. When the shell 1 and the extrusion ring 2 are sleeved, the locking boss 22 is clamped in the locking groove 14. The bushing 3 is provided with a limiting boss 31 near one end of the inner step 12, and the limiting boss 31 abuts against the inner step 12. The outer side wall of the bushing 3 is provided with a first clamping groove 32, and the first clamping groove 32 is provided with two or more. The inner side wall of the shell 1 is provided with a second clamping groove 15, and the second clamping groove 15 is provided with two or more. The width of the second clamping groove 15 is greater than the width of the first clamping groove 31. The first clamping groove 31 and the second clamping groove 15 are staggered. The bushing 3 is provided with a guide inclined surface 33 away from one end of the inner step 12, and the guide inclined surface 33 is inclinedly arranged towards the axis direction of the bushing 3.

[0022] When connecting the pipes, first, the bushing 3 is inserted into the opening of the pipe to be connected, the extrusion ring 2 is sleeved outside the pipe, then the pipe is inserted into the opening of one end of the shell 1 until the bushing 3 abuts against the inner step 12, then the extrusion ring 2 is moved towards the outer step 11 until the extrusion ring 2 abuts against the outer step 11. In this process, the extrusion ring 2 extrudes the opening end of the shell 1, so that the opening of the shell 1 is plastically deformed towards the center of the shell 1, the pipe is extruded into the first clamping groove 31 and the second clamping groove 15 in a wave shape, and then the pipe is fixed between the inner side wall of the shell 1 and the outer side wall of the bushing 3. The above steps are repeated at the other end until the two pipes are connected.

[0023] The above embodiments are exemplary, and the purpose is to illustrate the technical concept and characteristics of the utility model, so that those skilled in the art can understand the content of the utility model and implement it, and the protection scope of the utility model cannot be limited thereby. Any equivalent changes or modifications made according to the spirit and essence of the utility model should be covered within the protection scope of the utility model.

Claims

1. A firmly connected extrusion joint, characterized in that: The device includes a shell (1), a compression ring (2), and a bushing (3). The shell (1) is a hollow cylinder. The outer side wall of the shell (1) is provided with an outer step (11), and the inner side wall of the shell (1) is provided with an inner step (12). The inner step (12) is located in the middle of the shell (1) and divides the shell (1) into two sections. The bushing (3) is connected to the openings at both ends of the shell (1). The bushing (3) and the inner step (12) form an abutment. The bushing (3) and the inner wall of the shell (1) form a gap, and the pipes at both ends extend into the gap. The compression ring (2) is fitted into the outer side of the shell (1) to form a clamping part. The compression ring (2) and the outer step (11) form an abutment. The compression ring (2) compresses the two ends of the shell (1).

2. The firmly connected extrusion joint according to claim 1, characterized in that: The outer walls at both ends of the housing (1) are provided with sliding parts (13), and the inner wall of the extrusion ring (2) is provided with extrusion parts (21); the cross-sectional diameter of the extrusion part (21) is smaller than the cross-sectional diameter of the sliding part (13).

3. The firmly connected extrusion joint according to claim 2, characterized in that: The sliding part (13) includes a first guide surface (131), an inclined surface (132), and a second guide surface (133). The first guide surface (131), the inclined surface (132), and the second guide surface (133) are arranged sequentially along the axial direction of the housing (1). The cross-sectional diameter of the first guide surface (131) is smaller than the cross-sectional diameter of the second guide surface (133). The inclined surface (132) is transitionally connected to the first guide surface (131) and the second guide surface (133). The extrusion part (21) includes a first extrusion plane (211), a guide surface (212), and a second extrusion plane (213). The first extrusion plane (211), the guide surface (212), and the second extrusion plane (213) are arranged sequentially along the axial direction of the extrusion ring (2). The guide surface (212) is transitionally connected to the first extrusion plane (211), the guide surface (212), and the second extrusion plane (213). The cross-sectional diameter of the first extrusion plane (211) is smaller than the cross-sectional diameter of the second extrusion plane (213).

4. The firmly connected extrusion joint according to claim 1, characterized in that: The housing (1) is provided with a locking groove (14) near the outer step (11), and the compression ring (2) is provided with a locking boss (22) at one end near the outer step (11); when the housing (1) and the compression ring (2) are sleeved together, the locking boss (22) is engaged in the locking groove (14).

5. The firmly connected extrusion joint according to claim 1, characterized in that: The bushing (3) has a limiting boss (31) at one end near the inner step (12), and the limiting boss (31) and the inner step (12) abut against each other; the outer wall of the bushing (3) has a first slot (32), and there are two or more first slots (32).

6. The firmly connected extrusion joint according to claim 5, characterized in that: The inner wall of the housing (1) is provided with a second slot (15), and there are two or more second slots (15); the width of the second slot (15) is greater than the width of the first slot (32).

7. The firmly connected extrusion joint according to claim 6, characterized in that: The first card slot (32) and the second card slot (15) are arranged alternately.

8. The firmly connected extrusion joint according to claim 1, characterized in that: The bushing (3) is provided with a guide slope (33) at the end away from the inner step (12), and the guide slope (33) is inclined in the direction of the bushing (3) axis.

9. The firmly connected extrusion joint according to claim 1, characterized in that: The material hardness of the extrusion ring (2) and bushing (3) is greater than that of the shell (1).

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