A pipe connector

Abstract

The utility model discloses a kind of pipe fittings connectors, comprising: connecting seat, being suitable for being set on the connecting end of pipe fitting;Sealing filler, sealingly arranged between the inner wall of connecting seat and the outer wall of pipe fitting, sealing filler is configured to axial compression deformation and radial expansion when it is subjected to axial extrusion, to carry out flexible sealing connection to connecting seat and pipe fitting;And telescopic compensation component, between connecting seat and pipe fitting, for limiting the axial telescopic amount of pipe fitting on connecting seat in preset range.The pipe fittings connector in the utility model can improve the connection sealing property of pipeline, and the length compensation of pipeline thermal expansion and cold shrink can be carried out, and simultaneously has higher versatility.

Description

Technical Field

[0001] This utility model relates to the field of pipe fitting connection technology, and in particular to a pipe fitting connector. Background Technology

[0002] There are various ways to connect pipes, the most common being flange connections, welding, metal-sealed connections, or threaded connections. For pipes requiring flange connections, during on-site construction, the flanges are first welded or threaded onto the pipes, and then the pipes are connected by butt joints between flanges.

[0003] The above-mentioned pipe connection method has the following defects: First, the pipe is rigidly fixed and installed. When the pipe is heated or cooled, the length of the pipe will expand or contract to a certain extent, which will lead to stress concentration on the pipe and even damage to the pipe. Second, the pipe is sometimes subjected to external vibrations. Over time, the bolts on the flange will loosen, reducing the sealing effect of the pipe. Third, ordinary pipe connectors have low versatility and are difficult to adapt to two pipes with different materials, thicknesses, and outer diameters. Utility Model Content

[0004] This utility model provides a pipe connector for improving the connection sealing of pipes and compensating for the length of pipes due to thermal expansion and contraction, while also having high versatility.

[0005] This utility model provides a pipe connector, which includes: A connector, suitable for being fitted onto the connecting end of a pipe fitting; A sealing filler is disposed between the inner wall of the connector and the outer wall of the pipe fitting. The sealing filler is configured to undergo axial compression deformation and radial expansion when subjected to axial compression, thereby providing a flexible sealing connection between the connector and the pipe fitting. An expansion and contraction compensation component is disposed between the connecting seat and the pipe fitting, and is used to limit the axial expansion and contraction of the pipe fitting on the connecting seat within a preset range.

[0006] As one embodiment, the connector includes: A sleeve is used to be fitted onto the connecting end of the pipe fitting. The sealing filler is disposed between the inner wall of the sleeve and the outer wall of the pipe fitting. A limit stop is provided inside the sleeve. A clamping element is installed on the sleeve, one end of which extends into the sleeve and axially presses the sealing packing against the limiting stop; the clamping element is configured to adjust the clamping force and radial expansion of the sealing packing by adjusting its axial length extending into the sleeve.

[0007] In one embodiment, the limiting stop is annular and is adapted to the annular sealing packing in radial width.

[0008] As one embodiment, a positioning step is formed on the inner wall of the sleeve for axially limiting the limiting stop; the radial depth of the positioning step is not greater than the radial width of the limiting stop.

[0009] In one embodiment, the limiting stop is welded to the positioning step inside the sleeve.

[0010] In one embodiment, the inner ring surface of the limiting stop is adapted to the outer wall of the pipe to be connected, and the outer ring surface of the limiting stop is adapted to the inner wall of the sleeve.

[0011] As one embodiment, the clamping member includes: A pressure tube is sleeved on the pipe fitting, and one axial end face of the pressure tube extends into the sleeve and is used to press the sealing packing onto the limiting stop. A first flange is formed on the pressure tube and located outside the sleeve; when the pressure tube is pressed onto the sealing packing, the first flange is connected to a second flange formed on the sleeve by a threaded connection.

[0012] As one implementation method, the telescopic compensation component includes: A compensation limiting groove is at least partially provided on the connecting seat and extends axially along the connecting seat; The limiting component has one end disposed on the outer wall of the pipe fitting, and the other end extends into the compensation limiting groove and can be displaced along the extension direction of the compensation limiting groove. When the pipe fitting moves axially to its limit position relative to the connecting seat, the limiting member can abut against the axial end face of the compensating limiting groove to restrict the pipe fitting from continuing to move, thereby limiting the axial extension and contraction of the pipe fitting on the connecting seat to a preset range.

[0013] In one embodiment, the limiting member is a limiting pin, and a pin hole is provided on the outer wall of the pipe near its connecting end, and the limiting pin is interference-fitted with the pin hole.

[0014] In one embodiment, the length of the compensation limiting groove along the axial direction of the connecting seat is greater than the width of the limiting member along the axial direction of the connecting seat.

[0015] As one embodiment, the expansion compensation component further includes a connecting nut, which is sleeved on the pipe fitting and threadedly connected to the connecting seat; A stepped hole extending axially along the connecting seat is formed on the connecting seat. When the connecting nut is threadedly connected to the connecting seat, the compensation limiting groove is jointly defined by the connecting nut and the stepped hole of the connecting seat.

[0016] Compared with the prior art, the advantages of this utility model are: In this embodiment, on the one hand, the sealing packing seals the connector and the pipe fitting. By changing the axial compressive force on the sealing packing, the radial expansion of the sealing packing can be altered, thereby improving the sealing effect. On the other hand, the sealing packing provides a flexible sealing connection between the connector and the pipe fitting, allowing the pipe fitting to expand and contract axially relative to the connector, accommodating the expansion and contraction of the pipe fitting in the length direction due to thermal expansion and contraction, and avoiding stress concentration in the pipe fitting. Furthermore, since the expansion and contraction compensation component limits the axial expansion and contraction of the pipe fitting on the connector to a preset range, it can prevent the pipe fitting from detaching from the connector during axial expansion and contraction, improving the reliability of the connection between the pipe fitting and the connector. In addition, by installing sealing packings of different radial dimensions, pipe fittings of different outer diameters can be adapted, improving the versatility of the pipe fitting connector. Attached Figure Description

[0017] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0018] Figure 1 This is an internal sectional view of the pipe fitting connector after it has been installed and connected to the pipe fitting; Figure 2 This is an exploded view of the pipe connector without the expansion joint installed.

[0019] Figure label: 1. Connecting seat; 11. Sleeve; 111. Positioning step; 112. Second flange; 12. Clamping component; 121. Pressing pipe; 122. First flange; 123. Expansion compensation unit; 2. Sealing filler; 3. Telescopic compensation component; 31. Connecting nut; 32. Compensation limiting groove; 33. Limiting component; 4. Limit stop; 5. Threaded connectors; 100. Pipe fitting; 101. First pipe fitting; 102. Second pipe fitting. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] This utility model provides a pipe connector, which includes a connecting seat 1, a sealing filler 2, and a telescoping compensation component 3.

[0022] The connecting seat 1 is used to be sleeved on the connecting end of the pipe fitting 100. The sealing filler 2 is sealed between the inner wall of the connecting seat 1 and the outer wall of the pipe fitting 100. The sealing filler 2 is annular and sleeved on the pipe fitting 100. The sealing filler 2 is configured to be axially compressed and undergo axial compression deformation and radial expansion when it is axially compressed, thereby providing a flexible sealing connection between the connecting seat 1 and the pipe fitting 100. The expansion compensation component 3 is disposed between the connecting seat 1 and the pipe fitting 100 and is used to limit the axial expansion and contraction of the pipe fitting 100 on the connecting seat 1 to a preset range.

[0023] In this embodiment, on the one hand, the sealing filler 2 seals the connecting seat 1 and the pipe fitting 100. By changing the axial compressive force on the sealing filler 2, the radial expansion amount of the sealing filler 2 can be changed, thereby improving the sealing effect. On the other hand, the sealing filler 2 provides a flexible sealing connection between the connecting seat 1 and the pipe fitting 100, allowing the pipe fitting 100 to expand and contract axially relative to the connecting seat 1, so as to adapt to the expansion and contraction of the pipe fitting 100 in the length direction during thermal expansion and contraction, and avoid stress concentration in the pipe fitting 100. On this basis, since the expansion and contraction compensation component 3 limits the axial expansion and contraction of the pipe fitting 100 on the connecting seat 1 to a preset range, it can prevent the pipe fitting 100 from detaching from the connecting seat 1 during axial expansion and contraction, thereby improving the connection reliability between the pipe fitting 100 and the connecting seat 1. In addition, by setting sealing fillers 2 with different radial dimensions, pipe fittings 100 with different outer diameters can be adapted, improving the versatility of the pipe fitting connector.

[0024] In this embodiment, the pipe connector can quickly connect pipe fittings 100 of various materials and diameters. The materials of pipe fittings 100 can be cast iron pipes, carbon steel pipes, cement ceramic pipes, PE pipes, PPR pipes, fiberglass pipes, etc.

[0025] The structure and installation connection of connector 1 are described below.

[0026] The connector 1 includes a separately mounted sleeve 11 and a clamping element 12.

[0027] The sleeve 11 has a through hole inside. The sleeve 11 is sleeved on the connecting end of the pipe fitting 100. A limit stop 4 is provided inside the sleeve 11. The sealing filler 2 is placed between the inner wall of the sleeve 11 and the outer wall of the pipe fitting 100, and one side of the sealing filler 2 along the axial direction is attached to the limit stop 4.

[0028] One end of the clamping member 12 extends into the sleeve 11 and presses against the other side of the sealing packing 2 along the axial direction, thereby axially pressing the sealing packing 2 against the limiting stop 4. After being axially compressed by the clamping member 12, the sealing packing 2 is axially compressed and deformed and radially expanded to provide a flexible sealing connection between the connecting seat 1 and the pipe fitting 100. After the clamping member 12 presses the sealing packing 2, the clamping member 12 is fixedly connected to the sleeve 11.

[0029] The clamping element 12 can adjust the clamping force and radial expansion of the sealing packing 2 by adjusting its axial length extending into the sleeve 11, thereby improving the sealing effect of the sealing packing 2.

[0030] In this embodiment, the sealing filler 2 is a packing made of acrylic fiber after pre-oxidation. The core process is to convert the acrylic fiber into carbon fiber through pre-oxidation treatment, and then weave it into shape. The surface is impregnated and lubricated with polytetrafluoroethylene emulsion and graphite particles, which has excellent thermal conductivity, wear resistance and chemical stability.

[0031] During actual installation, the packing is wrapped around the fitting 100 so that the inner ring surface of the packing fits the outer wall of the fitting 100 and the outer ring surface of the packing fits the inner wall of the sleeve 11, in order to accommodate fittings 100 with different outer diameters.

[0032] As an optional implementation, the shape and installation method of the limiting stop 4 are as follows: the limiting stop 4 is annular and matches the annular sealing packing 2 in radial width. This arrangement can increase the contact area between the limiting stop 4 and the sealing packing 2, thereby improving the reliability and stability of the limiting stop 4 in axially limiting the sealing packing 2.

[0033] A positioning step 111 is formed on the inner wall of the sleeve 11 to axially limit the limiting stop 4. The radial depth of the positioning step 111 is not greater than the radial width of the limiting stop 4.

[0034] During installation, first select a suitable limit stop 4 according to the outer diameter of the pipe fitting 100 to be connected, and then weld the limit stop 4 to the positioning step 111 inside the sleeve 11, thereby improving the installation reliability of the limit stop 4 inside the sleeve 11.

[0035] The inner ring surface of the limiting stop 4 is adapted to the outer wall of the pipe fitting 100 to be connected. Preferably, the inner ring diameter of the limiting stop 4 is 2mm larger than the outer diameter of the pipe fitting 100 to be connected, for ease of installation. The outer ring surface of the limiting stop 4 is adapted to the inner wall of the sleeve 11. Preferably, the outer diameter of the limiting stop 4 is 2mm smaller than the inner diameter of the sleeve 11, for ease of installation.

[0036] In a preferred embodiment, the clamping member 12 has the following specific structure: The clamping member 12 includes an integrally formed clamping tube 121 and a first flange 122 formed on the clamping tube 121. The clamping member 12 is sleeved on the pipe fitting 100 via the clamping tube 121, and one axial end face of the clamping tube 121 extends into the sleeve 11 and is used to press the sealing packing 2 against the limiting stop 4; the first flange 122 is located outside the sleeve 11. After the clamping tube 121 is pressed against the sealing packing 2, the first flange 122 and the second flange 112 formed on the sleeve 11 are connected by a threaded connector 5. The threaded connector 5 can be a bolt or a nut.

[0037] The telescopic compensation component 3 in the embodiments of this utility model will be described below.

[0038] The telescopic compensation component 3 includes a connecting nut 31, a compensation limiting groove 32, and a limiting member 33.

[0039] An expansion compensation portion 123 is integrally formed on the clamping member 12 at one axial end opposite to the sealing packing 2. The outer wall of the expansion compensation portion 123 is provided with external threads. The connecting nut 31 is sleeved on the pipe fitting 100 and screwed into the external threads on the expansion compensation portion 123. A stepped hole extending axially along the connecting seat 1 is formed on the expansion compensation portion 123 of the clamping member 12. When the connecting nut 31 is threadedly connected to the connecting seat 1, the compensation limiting groove 32 is jointly defined by the connecting nut 31 and the stepped hole of the connecting seat 1.

[0040] One end of the limiting member 33 is disposed on the outer wall of the pipe fitting 100, and the other end extends into the compensation limiting groove 32 and can be displaced along the extension direction of the compensation limiting groove 32. When the pipe fitting 100 moves axially to the limit position relative to the connecting seat 1, the limiting member 33 can abut against the axial end face of the compensation limiting groove 32 to limit the pipe fitting 100 from continuing to move, thereby limiting the axial expansion and contraction of the pipe fitting 100 on the connecting seat 1 within a preset range.

[0041] In this embodiment, the limiting member 33 can be a limiting pin, and a pin hole is provided on the outer wall of the pipe 100 near its connecting end, and the limiting pin and the pin hole are interference fit.

[0042] The length of the compensation limiting groove 32 along the axial direction of the connecting seat 1 is greater than the width of the limiting member 33 along the axial direction of the connecting seat 1.

[0043] The basic installation principle for connecting two pipe fittings, first pipe fitting 101 and second pipe fitting 102, using a pipe fitting connector is as follows: Install the first pipe fitting 101 on one side of the pipe fitting connector: First, select a limiting stop 4 with an equivalent inner diameter according to the outer diameter of the first pipe fitting 101, and weld the limiting stop 4 to the positioning step 111 inside the sleeve 11; then, sequentially attach the connecting nut 31, the clamping member 12, and the sealing filler 2 to the first pipe fitting 101, and insert the limiting member 33 into the pin hole of the first pipe fitting 101, so that the other end of the limiting member 33 is inserted into the step hole on the expansion compensation part 123; insert the first pipe fitting 101 into the sleeve 11, insert the pressure tube 121 on the clamping member 12 into the sleeve 11 and axially press it onto the sealing filler 2, and then connect and fix the first flange 122 on the clamping member 12 to the second flange 112 on the sleeve 11; then, screw the connecting nut 31 onto the expansion compensation part 123 to ensure that the limiting member 33 is at least partially located in the compensation limiting groove 32.

[0044] Following the steps described above, the second fitting 102 can be connected to the other side of the fitting connector; thereby connecting the first fitting 101 and the second fitting 102.

[0045] Although the present invention has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of the invention. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A pipe connector, characterized in that, include: A connector, suitable for being fitted onto the connecting end of a pipe fitting; A sealing filler is disposed between the inner wall of the connector and the outer wall of the pipe fitting. The sealing filler is configured to undergo axial compression deformation and radial expansion when subjected to axial compression, thereby providing a flexible sealing connection between the connector and the pipe fitting. An expansion and contraction compensation component is disposed between the connecting seat and the pipe fitting, and is used to limit the axial expansion and contraction of the pipe fitting on the connecting seat within a preset range.

2. The pipe connector according to claim 1, characterized in that, The connector includes: A sleeve is used to be fitted onto the connecting end of the pipe fitting. The sealing filler is disposed between the inner wall of the sleeve and the outer wall of the pipe fitting. A limit stop is provided inside the sleeve. A clamping element is installed on the sleeve, one end of which extends into the sleeve and axially presses the sealing packing against the limiting stop; the clamping element is configured to adjust the clamping force and radial expansion of the sealing packing by adjusting its axial length extending into the sleeve.

3. The pipe connector according to claim 2, characterized in that, The limiting stop is annular and is adapted to the annular sealing packing in radial width.

4. The pipe connector according to claim 3, characterized in that, A positioning step is formed on the inner wall of the sleeve for axially limiting the limiting stop; The radial depth of the positioning step is not greater than the radial width of the limiting stop.

5. The pipe connector according to claim 4, characterized in that, The limiting stop is welded to the positioning step inside the sleeve.

6. The pipe connector according to claim 2, characterized in that, The clamping element includes: A pressure tube is sleeved on the pipe fitting, and one axial end face of the pressure tube extends into the sleeve and is used to press the sealing packing onto the limiting stop; A first flange is formed on the pressure tube and located outside the sleeve; when the pressure tube is pressed onto the sealing packing, the first flange is connected to a second flange formed on the sleeve by a threaded connection.

7. The pipe connector according to any one of claims 1-6, characterized in that, The telescopic compensation component includes: A compensation limiting groove is at least partially provided on the connecting seat and extends axially along the connecting seat; The limiting component has one end disposed on the outer wall of the pipe fitting, and the other end extends into the compensation limiting groove and can be displaced along the extension direction of the compensation limiting groove. When the pipe fitting moves axially to its limit position relative to the connecting seat, the limiting member can abut against the axial end face of the compensating limiting groove to restrict the pipe fitting from continuing to move, thereby limiting the axial extension and contraction of the pipe fitting on the connecting seat to a preset range.

8. The pipe connector according to claim 7, characterized in that, The limiting component is a limiting pin, and a pin hole is provided on the outer wall of the pipe near its connecting end. The limiting pin is interference-fitted with the pin hole.

9. The pipe connector according to claim 7, characterized in that, The length of the compensation limiting groove along the axial direction of the connecting seat is greater than the width of the limiting member along the axial direction of the connecting seat.

10. The pipe connector according to claim 7, characterized in that, The expansion compensation assembly also includes a connecting nut, which is sleeved on the pipe fitting and threadedly connected to the connecting seat. A stepped hole extending axially along the connecting seat is formed on the connecting seat. When the connecting nut is threadedly connected to the connecting seat, the compensation limiting groove is jointly defined by the connecting nut and the stepped hole of the connecting seat.

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