Telescopic joint

Abstract

The utility model relates to the technical field of pipe joint structural design, in particular to an expansion joint which comprises an upper joint and a lower joint, the upper joint comprises a first connecting part and a first main body, the lower joint comprises a second connecting part and a second main body, and the axis of the first connecting part is parallel to the axis of the first main body. When the first pipeline and the second pipeline are connected, the first main body and the second main body are aligned with the first pipeline and the second pipeline respectively, the first main body and the second main body are rotated to enable the first connecting part and the second connecting part to be aligned and connected, the first pipeline is connected with the first main body, and the second pipeline is connected with the second main body. And the second pipeline is connected with the second main body to finish the connection work of the first pipeline and the second pipeline.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipe joint structure design technical field, more specifically, it relates to a telescopic joint. BACKGROUND

[0002] When the pipeline needs to pass through the floor, the pipeline joint is pre-buried when the floor is poured, and the pipeline installation construction is carried out in the later period. When the pipeline installation is carried out between the floors, the center axes of the pipeline joints pre-buried in the upper and lower floors do not coincide, and some even have large deviation, the pipeline glued in the upper floor and the pipeline in the lower floor are not on the same center line, which leads to the upper and lower pipes unable to be connected. Therefore, a pipeline joint capable of connecting the pipelines with different axis lines is required. SUMMARY

[0003] The utility model aims at overcoming the deficiency that the pipeline joint in the prior art cannot connect the pipelines with different axis lines, and provides a telescopic joint capable of adjusting the axis line distance of both ends of the telescopic joint and connecting the pipelines with different axis lines.

[0004] To solve the above technical problems, the utility model adopts the technical scheme of:

[0005] A telescopic joint is provided, which comprises an upper joint and a lower joint, the upper joint is communicated with a first pipeline at one end and communicated with the lower joint at the other end, the lower joint is communicated with a second pipeline, characterized in that the upper joint comprises a first connecting part and a first main body connected with the first pipeline, the lower joint comprises a second connecting part and a second main body connected with the second pipeline, the axis line of the first connecting part is parallel to the axis line of the first main body, the axis line of the second connecting part is parallel to the axis line of the second main body, and the axis lines of the first connecting part and the second connecting part coincide when the first connecting part is connected with the second connecting part.

[0006] The telescopic joint of the utility model makes the axis lines of the first main body and the second main body coincide with the axis lines of the first pipeline and the second pipeline respectively when the first pipeline and the second pipeline are connected, rotates the first main body and the second main body to make the axis lines of the first connecting part and the second connecting part coincide, connects the first pipeline with the first main body, connects the second pipeline with the second main body, connects the first connecting part with the second connecting part, and completes the connection work of the first pipeline and the second pipeline; the axis line distance between the first connecting part and the first main body is recorded as L1, the axis line distance between the second connecting part and the second main body is recorded as L2, the first pipeline and the second pipeline with the axis line distance greater than the absolute value of L1-L2 and less than L1+L2 can be connected by rotating the first main body and the second main body.

[0007] Further, the distance between the axis of the first connecting part and the axis of the first main body is equal to the distance between the axis of the second connecting part and the axis of the second main body. When the axes of the first pipe and the second pipe coincide, the first main body and the second main body are rotated so that the axes of the first main body, the first connecting part, the second connecting part and the second main body are in the same plane, and the axes of the first main body and the second main body are on the same side of the axis of the first connecting part. At this time, the distance between the axes of the first main body and the second main body is L1-L2=0, the axes of the first main body and the second main body coincide, and the coaxial first pipe and the second pipe can be connected.

[0008] Further, the first connecting part is a bias socket, and the second connecting part is a bias spigot, or the first connecting part is a bias spigot, and the second connecting part is a bias socket. The second connecting part and the first connecting part are connected by the bias socket and the bias spigot. Taking the first connecting part as a bias socket and the second connecting part as a bias spigot as an example, when the upper connector and the lower connector are connected, the second connecting part is inserted into the first connecting part, and the first connecting part and the second connecting part are fixedly connected by means of glue or the like. The installation is simple and reliable.

[0009] Further, the inner diameter of the first main body is greater than the outer diameter of the first pipe, and the first pipe is inserted into the first main body. By changing the depth of the first pipe inserted into the first main body, the distance between the first pipe and the second pipe can be changed, achieving the effect of telescoping.

[0010] Further, the length of the first main body is greater than the axial distance between the first pipe and the second pipe. The first main body has sufficient length to ensure the telescoping length and the installation space of the lower connector.

[0011] Further, the first main body is provided with a first socket connected with the first pipe. The first main body and the first pipe are connected in a socket and spigot manner, which is simple and reliable.

[0012] Further, the first socket of the first main body is provided with a sealing ring, which abuts against the inner wall of the first socket and the outer wall of the first pipe, respectively. The sealing ring plays a sealing and fixing role.

[0013] Further, the inner side of the sealing ring is provided with an inner wing extending towards the axis of the sealing ring. When the pipe is inserted into the first main body, the inner wing can further extrude the outer wall of the first pipe, improving the sealing performance.

[0014] Further, the screw cap is provided with an inner thread on an inner hole, the first spout of the first body is provided with an outer thread matched with the inner thread, and the inner side of the screw cap is provided with a pressing part extending to the screw cap axis, the inner diameter of the pressing part is smaller than the outer diameter of the sealing ring and larger than the outer diameter of the first pipeline.

[0015] Further, the pressing part and the sealing ring are provided with a gasket, which can increase the stress area of the pressing part and the sealing ring, increase the friction, and make the installation of the screw cap and the sealing ring more stable.

[0016] Compared with the prior art, the utility model has the advantages that:

[0017] The telescopic joint has the advantages that: 1. the distance between the axis of the first body and the second body can be adjusted, so that the first body and the second body can be connected with the first pipeline and the second pipeline which are not coincident with the axis respectively; 2. the depth of the first pipeline inserted into the first body can be adjusted to change the distance between the first pipeline and the second pipeline, so that the telescopic function is realized; 3. the installation is simple; and 4. the sealing performance is good, and the leakage is less likely to occur. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 Fig. 1 is a first structural schematic view of the telescopic joint of the utility model;

[0019] Figure 2 Fig. 2 is a second structural schematic view of the telescopic joint of the utility model;

[0020] Figure 3 Fig. 3 is a third structural schematic view of the telescopic joint of the utility model;

[0021] Figure 4 Fig. 4 is a fourth structural schematic view of the telescopic joint of the utility model;

[0022] Figure 5 Fig. 5 is a structural schematic view of the screw cap of the telescopic joint of the utility model;

[0023] Figure 6 Fig. 6 is a structural schematic view of the sealing ring of the telescopic joint of the utility model;

[0024] Figure 7 Fig. 7 is a first schematic view of the installation of the upper joint;

[0025] Figure 8 second pipe is installed;

[0026] Figure 9 second pipe is installed;

[0027] Figure 10 first lower joint is installed;

[0028] Figure 11 second lower joint is installed;

[0029] Figure 12 upper joint and lower joint are connected;

[0030] Figure 13 installation is completed;

[0031] In the drawings: 1, upper joint; 11, first body; 111, first socket; 112, sealing ring; 1121, inner wing; 113, gasket; 114, nut; 1141, compression part; 12, first connecting part; 2, lower joint; 21, second body; 22, second connecting part; 3, first pipe; 4, second pipe; 5, upper floor; 6, lower floor. DETAILED DESCRIPTION

[0032] The utility model will be further explained in connection with specific implementation. Among them, the drawings are only for example explanation, and the representation is only schematic diagram, and not physical picture, and can not be understood as the limitation of the patent; in order to better illustrate the embodiment of the utility model, some components of the drawings will be omitted, enlarged or reduced, and not represent the size of actual product; for those skilled in the art, it is understandable that some well-known structures in the drawings and their description can be omitted.

[0033] The same or similar reference numerals in the drawings of the embodiment of the utility model correspond to the same or similar components; in the description of the utility model, it is understood that if the orientation or position relationship indicated by the terms "upper", "lower", "left", "right" etc. is based on the orientation or position relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the indicated device or element must have a particular orientation, a particular orientation and operation, therefore the position relationship description term in the drawings is only for example explanation, and can not be understood as the limitation of the patent, for the ordinary skilled in the art, the specific meaning of the above terms can be understood according to the specific situation.

[0034] Embodiment one

[0035] As Figures 1 to 4The utility model discloses a telescopic joint, including upper joint 1 and lower joint 2, the first pipeline 3 is communicated with one end of upper joint 1, and the other end is communicated with lower joint 2, and lower joint 2 is communicated with the second pipeline 4, and upper joint 1 includes first connecting portion 12 and the first body 11 connected with the first pipeline 3, and lower joint 2 includes second connecting portion 22 and the second body 21 connected with the second pipeline 4, the axis of first connecting portion 12 is parallel with the axis of first body 11, and the axis of second connecting portion 22 is parallel with the axis of second body 21, when first connecting portion 12 is connected with second connecting portion 22, the axis of first connecting portion 12 coincides with the axis of second connecting portion 22.

[0036] The utility model discloses a telescopic joint, connecting first pipeline 3 and second pipeline 4, make the axis of first body 11 and second body 21 coincide with the axis of first pipeline 3 and second pipeline 4 respectively, rotate first body 11 and second body 21 make the axis of first connecting portion 12 and second connecting portion 22 coincide, make first pipeline 3 connect with first body 11, second pipeline 4 connect with second body 21, first connecting portion 12 connect with second connecting portion 22, complete the connection work of first pipeline 3 and second pipeline 4, the axis distance of first connecting portion 12 and first body 11 is recorded as L1, and the axis distance between second connecting portion 22 and second body 21 is recorded as L2, through rotating first body 11 and second body 21, can realize the connection of first pipeline 3 and second pipeline 4, and the absolute value of axis distance is greater than L1-L2, and less than L1+L2.

[0037] In the embodiment, the distance between the axis of first connecting portion 12 and the axis of first body 11 is equal to the distance between the axis of second connecting portion 22 and the axis of second body 21, when the axis of first pipeline 3 coincides with the axis of second pipeline 4, rotate first body 11 and second body 21, make the axis of first body 11, first connecting portion 12, second connecting portion 22 and second body 21 all be located in the same plane, and the axis of first body 11 and second body 21 are located on the same side of the axis of first connecting portion 12, at this moment, the axis distance of first body 11 and second body 21 is L1-L2=0, the axis of first body 11 coincides with the axis of second body 21, can connect the first pipeline 3 and second pipeline 4 of coaxial.

[0038] As Figure 1 And Figure 2As shown, the first connecting part 12 is a bias socket, the second connecting part 22 is a bias plug, or the first connecting part 12 is a bias plug, and the second connecting part 22 is a bias socket; the second connecting part 22 and the first connecting part 12 are connected by the bias socket and the bias plug. Taking the first connecting part 12 as a bias socket and the second connecting part 22 as a bias plug as an example, when connecting the upper joint 1 and the lower joint 2, the second connecting part 22 is inserted into the first connecting part 12, and the first connecting part 12 and the second connecting part 22 are fixedly connected by means of glue bonding and the like, so that the installation is simple and the reliability is high.

[0039] In this embodiment, the first connecting part 12 is a bias socket, the second connecting part 22 is a bias plug, and the bias socket and the bias plug are bonded by glue.

[0040] The working principle of the expansion joint of this embodiment is as follows: when connecting the first pipeline 3 and the second pipeline 4, the axes of the first main body 11 and the second main body 21 coincide with the axes of the first pipeline 3 and the second pipeline 4 respectively, the first connecting part 12 and the second connecting part 22 are rotated to coincide with each other, the second connecting part 22 is inserted into the first connecting part 12, and the first connecting part 12 and the second connecting part 22 are bonded by glue, so that the first pipeline 3 is connected with the first main body 11, the second pipeline 4 is connected with the second main body 21, and the connection work of the first pipeline 3 and the second pipeline 4 is completed.

[0041] Since the distance between the axis of the first connecting part 12 and the axis of the first main body 11 is equal to the distance between the axis of the second connecting part 22 and the axis of the second main body 21, the distance between the axis of the first connecting part 12 and the axis of the first main body 11 is recorded as L1=L2=L.

[0042] As shown in the figure, Figure 3 When the axes of the first pipeline 3 and the second pipeline 4 are the same, the first main body 11 and the second main body 21 are rotated so that the axes of the first main body 11, the second main body 21 and the first connecting part 12 are located in the same plane, and the axes of the first main body 11 and the second main body 21 are located on the same side of the axis of the first connecting part 12, at this time, the distance between the axes of the first main body 11 and the second main body 21 is L-L=0, the axes of the first main body 11 and the second main body 21 coincide, and the coaxial first pipeline 3 and the second pipeline 4 can be connected; as shown in the figure, Figure 4As shown, when the distance between the axes of the first pipe 3 and the second pipe 4 is 2L, the first main body 11 and the second main body 21 are rotated so that the axes of the first main body 11, the second main body 21 and the first connecting part 12 are located in the same plane, and the axis of the first connecting part 12 is located between the axis of the first main body 11 and the axis of the second main body 21, and the distance between the axes of the first main body 11 and the second main body 21 is 2L; when the distance between the axes of the first pipe 3 and the second pipe 4 is between 0 and 2L, the axes of the first main body 11, the second main body 21 and the first connecting part 12 are not in the same plane.

[0043] Example 2

[0044] This embodiment is the second embodiment of the expansion joint of this utility model. This embodiment is similar to the first embodiment, except that, as Figures 1 to 4 As shown, the inner diameter of the first body 11 is larger than the outer diameter of the first pipe 3, and the first pipe is inserted into the first body 11. The distance between the first pipe 3 and the second pipe 4 can be changed by altering the depth to which the first pipe 3 is inserted into the first body 11, thus achieving a telescoping effect.

[0045] like Figure 11 As shown, the length of the first body 11 is greater than the axial distance between the first pipe 3 and the second pipe 4. The first body 11 has sufficient length to ensure the expansion joint length and the installation space for the lower connector 2.

[0046] like Figure 2 As shown, the first body 11 is provided with a first socket 111 for connecting to the first pipe 3. The first body 11 and the first pipe 3 are connected by a socket, which is simple to install and has high reliability.

[0047] The second main body 21 is provided with a second socket for connecting to the second pipe 4. When connecting the second pipe 4 and the lower connector 2, the second pipe 4 is inserted into the second socket, the second connecting part 22 is rotated to a suitable position, and the second pipe 4 is fixedly connected to the second socket by means of adhesive bonding or other methods.

[0048] The working principle of the expansion joint in this embodiment is as follows: Taking the connection between the first pipe 3 and the second pipe 4, which are respectively installed on two concrete floor slabs, as an example, the working steps are as follows: 1. As... Figure 7 and Figure 8 As shown, the first pipe 3 is installed in the pre-embedded joint of the upper floor slab 5 with glue. The first socket 111 of the upper connector 1 is fitted onto the first pipe 3. The upper connector 1 is moved upward until the bottom of the first body 11 reaches the bottom end face of the first pipe 3; 2. As shown Figure 9 As shown, the second pipe 4 is installed in the pre-embedded joint of the lower floor slab 6, ensuring that the distance between the bottom of the first connection part 12 and the top of the second pipe 4 is greater than the length of the lower joint 2; 3. As shown Figure 10As shown in FIG. 1, the second socket of the lower joint 2 is sleeved on the second pipeline 4, and the first body 11 and the second body 21 are rotated to make the axis of the first connecting part 12 coincide with the axis of the second connecting part 22. Figure 11 As shown in FIG. 2, the second socket and the second pipeline 4 are coated with glue, and the lower joint 2 is moved downward, so that the top of the second socket reaches the top of the second pipeline 4, and the second socket and the second pipeline 4 are bonded by the glue. Figure 12 As shown in FIG. 3, the first connecting part 12 and the second connecting part 22 are coated with glue, and the upper joint 1 is moved downward until the second connecting part 22 is inserted into the first connecting part 12 and bonded by the glue, thereby completing the connection of the first pipeline 3 and the second pipeline 4. Figure 13

[0049] Embodiment Three

[0050] The third embodiment of the telescopic joint of the utility model is similar to the second embodiment, and the difference lies in that the first socket 111 of the first body 11 is provided with a sealing ring 112, and the sealing ring 112 abuts against the inner wall of the first socket 111 and the outer wall of the first pipeline 3 respectively. The sealing ring 112 plays a sealing and fixing role.

[0051] As shown in FIG. 4, the inner side of the sealing ring 112 is provided with an inner wing 1121 extending to the axis of the sealing ring 112. When the pipeline is inserted into the first body 11, the inner wing 1121 can further extrude the outer wall of the first pipeline 3, thereby improving the sealing performance. The included angle between the inner wing 1121 and the wall surface of the sealing ring 112 located below the inner wing 1121 is an acute angle, which can improve the sealing performance while reducing the difficulty of inserting the first pipeline 3 into the upper joint 1. Figure 6 As shown in FIG. 5, the utility model further comprises a nut 114, the inner hole of the nut 114 is provided with an internal thread, the outer side of the first socket 111 of the first body 11 is provided with an external thread matched with the internal thread, the inner side of the nut 114 is provided with a pressing part 1141 extending to the axis of the nut 114, the inner diameter of the pressing part 1141 is smaller than the outer diameter of the sealing ring 112 and larger than the outer diameter of the first pipeline 3. When the first pipeline 3 is connected with the upper joint 1, the pipeline is sequentially inserted into the nut 114, the sealing ring 112 and the first body 11, the sealing ring 112 is pressed into the first socket 111, so that the upper joint 1 cannot fall, after the first body 11 and the second body 21 are rotated to align the first connecting part 12 and the second connecting part 22, the depth of the first pipeline 3 inserted into the first body 11 is adjusted, so that the first connecting part 12 and the second connecting part 22 can be connected, the nut 114 is rotated to move along the internal thread to the sealing ring 112, until the pressing part 1141 presses the sealing ring 112 tightly, thereby completing the fixing and sealing between the pipeline and the first body 11.

[0052] Figure 5 As shown in FIG. 5, the utility model further comprises a nut 114, the inner hole of the nut 114 is provided with an internal thread, the outer side of the first socket 111 of the first body 11 is provided with an external thread matched with the internal thread, the inner side of the nut 114 is provided with a pressing part 1141 extending to the axis of the nut 114, the inner diameter of the pressing part 1141 is smaller than the outer diameter of the sealing ring 112 and larger than the outer diameter of the first pipeline 3. When the first pipeline 3 is connected with the upper joint 1, the pipeline is sequentially inserted into the nut 114, the sealing ring 112 and the first body 11, the sealing ring 112 is pressed into the first socket 111, so that the upper joint 1 cannot fall, after the first body 11 and the second body 21 are rotated to align the first connecting part 12 and the second connecting part 22, the depth of the first pipeline 3 inserted into the first body 11 is adjusted, so that the first connecting part 12 and the second connecting part 22 can be connected, the nut 114 is rotated to move along the internal thread to the sealing ring 112, until the pressing part 1141 presses the sealing ring 112 tightly, thereby completing the fixing and sealing between the pipeline and the first body 11.

[0053] As​​Figure 2 As shown, the gasket is arranged between the compression part 1141 and the sealing ring 112. The force area of the compression part 1141 and the sealing ring 112 is increased, the friction is increased, and the installation of the nut 114 and the sealing ring 112 is more stable.

[0054] The working principle of the telescopic joint is as follows: when the first pipeline 3 is connected with the upper joint 1, the pipeline is sequentially inserted into the nut 114, the gasket 113, the sealing ring 112 and the first body 11, as shown in the figure. Figure 7 When the bottom of the first body 11 reaches the bottom end face of the first pipeline 3, the sealing ring 112 is pressed into the first socket 111, as shown in the figure. Figure 8 The inner wall and the inner wing 1121 of the sealing ring 112 are pressed against the outer wall of the first pipeline 3, and the friction generated makes the upper joint 1 not easy to fall; after rotating the first body 11 and the second body 21 to align the first connecting part 12 and the second connecting part 22, the depth of the first pipeline 3 inserted into the first body 11 is adjusted until the second connecting part 22 is inserted into the first connecting part 12, the second socket is connected with the second pipeline 4, and the first connecting part 12 is connected with the second connecting part 22, as shown in the figure. Figure 13 The nut 114 is rotated, and the nut 114 moves along the internal thread to the sealing ring 112 until the compression part 1141 compresses the gasket 113 and the sealing ring 112, and the fixing and sealing between the pipeline and the first body 11 are completed.

[0055] In the specific contents of the above specific embodiments, any combination of technical features can be combined without contradiction. In order to make the description simple, all possible combinations of the above technical features are not described, but as long as the combination of these technical features does not exist contradiction, it should be considered as the scope of the present application.

[0056] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not a limitation on the embodiments of the present application. For ordinary skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and impossible to exhaust all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A telescopic joint comprising an upper joint (1) and a lower joint (2), said upper joint (1) being in communication at one end with a first pipe (3) and at the other end with said lower joint (2), said lower joint (2) being in communication with a second pipe (4), characterized in that, The upper joint (1) comprises a first connecting part (12) and a first body (11) connected with the first pipeline (3), the lower joint (2) comprises a second connecting part (22) and a second body (21) connected with the second pipeline (4), the axis of the first connecting part (12) is parallel to the axis of the first body (11), the axis of the second connecting part (22) is parallel to the axis of the second body (21), and the axis of the first connecting part (12) coincides with the axis of the second connecting part (22) when the first connecting part (12) is connected with the second connecting part (22).

2. The expansion joint of claim 1, wherein, The distance between the axis of the first connecting part (12) and the axis of the first body (11) is equal to the distance between the axis of the second connecting part (22) and the axis of the second body (21).

3. The expansion joint of claim 1, wherein, The first connecting part (12) is a bias socket, the second connecting part (22) is a bias socket, or the first connecting part (12) is a bias socket, and the second connecting part (22) is a bias socket; the second connecting part (22) and the first connecting part (12) are connected by the bias socket and the bias socket.

4. The expansion joint of claim 1, wherein, The inner diameter of the first body (11) is greater than the outer diameter of the first pipeline (3), and the first pipeline (3) is inserted into the first body (11).

5. A telescopic joint according to claim 4, characterised in that The length of the first body (11) is greater than the axial distance between the first pipeline (3) and the second pipeline (4).

6. The expansion joint of claim 4, wherein, The first body (11) is provided with a first socket (111) connected with the first pipeline (3).

7. A telescopic joint according to claim 6, characterised in that The first socket (111) of the first body (11) is provided with a sealing ring (112), and the sealing ring (112) abuts against the inner wall of the first socket (111) and the outer wall of the first pipeline (3) respectively.

8. A telescopic joint according to claim 7, characterised in that The inner side of the sealing ring (112) is provided with an inner wing (1121) extending to the axis of the sealing ring (112).

9. The expansion joint of claim 7, wherein, Further comprising a nut (114), the inner hole of the nut (114) is provided with an internal thread, the outer side of the first socket (111) of the first body (11) is provided with an external thread matched with the internal thread, and the inner side of the nut (114) is provided with a pressing part (1141) extending to the axis of the nut (114), the inner diameter of the pressing part (1141) is smaller than the outer diameter of the sealing ring (112) and greater than the outer diameter of the first pipeline (3).

10. A telescopic section according to claim 9, characterised in that A gasket is arranged between the pressing part (1141) and the sealing ring (112).

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