Vertical pipe expansion joint

Abstract

The utility model discloses a vertical pipe expansion joint. The stand pipe expansion joint comprises a main body (5), an upper pipe body (1) and a sealing mechanism, one end of the main body (5) is a socket end (501), the upper pipe body (1) comprises a first pipe section (102), a positioning section (103) and a second pipe section (101) which are sequentially connected, the second pipe section (101) is used for being inserted into the socket end (501), and the sealing mechanism is arranged at the socket end (501) and used for connecting the main body (5) and the second pipe section (101). The outer diameter of the positioning section (103) is larger than that of the second pipe section (101), and the outer diameter of the second pipe section (101) is not equal to that of the first pipe section (102). According to the vertical pipe telescopic energy-saving device, the installation depth is determined during installation.

Description

Technical Field

[0001] The utility model relates to the field of expansion joints, and more specifically, to a riser expansion joint. Background Art

[0002] PVC drainage pipes are widely used in building drainage projects. However, PVC pipes inherently expand and contract with temperature, which can affect the quality of installation. Therefore, expansion joints are widely used in construction projects to address this thermal expansion and contraction.

[0003] While many existing expansion joints can address the thermal expansion and contraction of pipes, it's difficult to determine the correct installation depth. If installed too deep, thermal expansion can cause the pipe end to push off other glued connections, leading to leaks. If installed too shallow, contraction can cause the pipe end to separate from the sealing rubber ring, causing leaks.

[0004] The prior art discloses a detachable threaded expansion joint, comprising an expansion joint body, a sealing ring, and a compression ring. The expansion joint body has an external thread at its upper end, while the compression ring has an internal thread. The external thread on the expansion joint body and the internal thread on the compression ring precisely engage with each other. This expansion joint does not take into account the pipe installation depth. Utility Model Content

[0005] The utility model aims to solve the defect in the prior art that it is difficult to determine the installation depth when installing the expansion joint, and provides a vertical pipe expansion joint, the installation depth of which can be determined during installation.

[0006] The primary purpose of this utility model is to solve the above technical problems. The technical solutions of this utility model are as follows:

[0007] A riser expansion joint comprises a main body, an upper tube body and a sealing mechanism, wherein one end of the main body is a socket end, the upper tube body comprises a first tube segment, a positioning segment and a second tube segment connected in sequence, the second tube segment is used to be inserted into the socket end, the sealing mechanism is provided at the socket end and is used to connect the main body and the second tube segment, the outer diameter of the positioning segment is larger than the outer diameter of the second tube segment, and the outer diameter of the second tube segment is not equal to the outer diameter of the first tube segment.

[0008] Furthermore, the outer diameter of the positioning section gradually decreases from the end where the positioning section is connected to the first pipe section to the end where the positioning section is connected to the second pipe section, so that the positioning section has a truncated cone structure.

[0009] Furthermore, the sealing mechanism includes a threaded cover and an rubber ring, the inner wall of the socket end is provided with a placement step, the rubber ring is located inside the socket end and on the placement step, the threaded cover includes an outer cover body and an inner cover body, the outer cover body and the inner cover body are both annular structures, the inner cover body is located inside the outer cover body, the inner cover body and the outer cover body are coaxially arranged, and the outer cover body and the inner cover body are connected by an intermediate cover body, so that a slot for the socket end to be inserted is formed between the outer cover body and the inner cover body, the outer cover body facing the side of the inner cover body is provided with an internal thread, the socket end is provided with an external thread, and the outer cover body and the socket end are threadedly connected by the internal thread and the external thread.

[0010] Furthermore, the top of the inner cover body is provided with a positioning surface that fits with the outer side wall of the positioning section.

[0011] Furthermore, the length of the external thread is greater than 25 mm.

[0012] Furthermore, the inner diameter of the rubber ring is smaller than the outer diameter of the second pipe section.

[0013] Furthermore, the sealing mechanism also includes a gasket, which is located inside the socket end and between the inner cover and the rubber ring.

[0014] Furthermore, the rubber ring includes an integrated first rubber part and a second rubber part, the first rubber part and the second rubber part are both annular structures, the first rubber part and the second rubber part are coaxially arranged, the outer side walls of the first rubber part and the second rubber part are flush, the inner diameter of the first rubber part is smaller than the inner diameter of the second rubber part, so that the thickness of the first rubber part is greater than the thickness of the second rubber part, and when the rubber ring is located at the socket end, the second rubber part is closer to the placement step relative to the first rubber part.

[0015] Furthermore, the socket end includes a first socket section and a second socket section connected to each other, the diameter of the first socket section is larger than the diameter of the second socket section, so that the connection between the first socket section and the second socket section forms the placement step.

[0016] Furthermore, the outer side wall of the outer cover is provided with anti-slip grooves.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] The utility model provides a positioning section on the upper tube body, and the outer diameter of the positioning section is larger than the outer diameter of the second tube section plugged into the main body, so that the positioning section and the second tube section are clearly distinguished, thereby ensuring that during installation, the operator inserts the second tube section completely into the main body. The length of the second tube section is the installation depth, which plays a role of distinction and prompt, thereby ensuring the installation depth of the telescopic joint and preventing the problem of falling off due to thermal expansion and contraction caused by insufficient installation depth. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 An exploded view of a riser expansion joint provided in an embodiment.

[0020] Figure 2 A schematic structural diagram of a threaded cover provided in an embodiment.

[0021] Figure 3 This is a diagram of the assembly structure of a riser expansion joint provided in an embodiment.

[0022] Figure 4 This is a schematic structural diagram of the rubber ring provided in the embodiment. DETAILED DESCRIPTION

[0023] The accompanying drawings are for illustrative purposes only and are not to be construed as limiting this patent;

[0024] In order to better illustrate this embodiment, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product size;

[0025] It is understandable to those skilled in the art that some well-known structures and descriptions thereof may be omitted in the drawings.

[0026] The technical solution of the present utility model is further described below with reference to the accompanying drawings and embodiments.

[0027] Example 1

[0028] like Figure 1 、 Figure 3 As shown, a riser expansion joint includes a main body 5, an upper tube body 1 and a sealing mechanism, one end of the main body 5 is a socket end 501, the upper tube body 1 includes a first pipe segment 102, a positioning segment 103 and a second pipe segment 101 connected in sequence, the second pipe segment 101 is used to be inserted into the socket end 501, the sealing mechanism is provided at the socket end 501 and is used to connect the main body 5 and the second pipe segment 101, the outer diameter of the positioning segment 103 is larger than the outer diameter of the second pipe segment 101, and the outer diameter of the second pipe segment 101 is not equal to the outer diameter of the first pipe segment 102.

[0029] It should be noted that the positioning section 103 is used for positioning, and no positioning auxiliary tools are required. The socket depth positioning can be achieved by using the pipe body. At the same time, the design of the sealing mechanism can achieve different contraction and extension control.

[0030] Furthermore, the outer diameter of the positioning section 103 gradually decreases from the end where the positioning section 103 is connected to the first pipe section 102 to the end where the positioning section 103 is connected to the second pipe section 101 , so that the positioning section 103 has a truncated cone structure.

[0031] Example 2

[0032] Based on the riser expansion joint described in Example 1, this embodiment uses the same riser expansion joint as that in Example 1. Figure 2 As shown, the sealing mechanism of the specific embodiment includes a threaded cover 2 and an apron 3. The inner wall of the socket end 501 is provided with a placement step. The apron is located inside the socket end 501 and on the placement step. The threaded cover 2 includes an outer cover body 204 and an inner cover body 203. The outer cover body 204 and the inner cover body 203 are both annular structures. The inner cover body 203 is located inside the outer cover body 204. The inner cover body 203 and the outer cover body 204 They are coaxially arranged, and the outer cover body 204 and the inner cover body 203 are connected by the middle cover body 205, so that a slot for the socket end 501 to be inserted is formed between the outer cover body 204 and the inner cover body 203, and the outer cover body 204 is provided with an internal thread 201 on the side facing the inner cover body 203, and the socket end 501 is provided with an external thread 502, and the outer cover body 204 and the socket end 501 are threadedly connected by the internal thread 201 and the external thread 502.

[0033] Furthermore, a positioning surface 202 is provided on the top of the inner cover 203 , which is in contact with the outer wall of the positioning section 103 .

[0034] Furthermore, the length of the external thread 502 is greater than 25 mm.

[0035] It should be noted that the threaded cover 2 is screwed down to extrude the rubber ring 3, so that the sealing effect of the riser expansion joint is better.

[0036] Furthermore, the inner diameter of the rubber ring 3 is smaller than the outer diameter of the second pipe section 101 .

[0037] Furthermore, the sealing mechanism further includes a gasket 4 , which is located inside the socket end 501 and between the inner cover 203 and the rubber ring 3 .

[0038] In a specific embodiment, the length of the second pipe section 101 is greater than 50 mm.

[0039] It should be noted that when the riser expansion joint is initially installed, the threaded cap 2 is placed at the socket end 501, and the positioning surface 202 is aligned with the positioning section 103, thereby creating a spacing greater than 25mm between the positioning section 103 and the socket end 501. When the riser expansion joint is fully installed, the threaded cap 2 is screwed down and threadedly connected to the external thread 502. At this time, the original spacing between the positioning section 103 and the socket end 501 is retained, preventing the positioning section 103 and the socket end 501 from contacting and squeezing the socket end 501 during thermal expansion. At the same time, the length of the second pipe section 101 is greater than 50mm, so that when the riser expansion joint is fully installed, the end of the second pipe section 101 away from the positioning section 103 is greater than 25mm away from the position where the second pipe section 101 contacts the rubber ring 3, thereby preventing the end of the second pipe section 101 away from the positioning section 103 from separating from the socket end 501 during cold contraction.

[0040] Example 3

[0041] Based on the riser expansion joint described in Example 2, this embodiment uses the same riser expansion joint as that in Example 2. Figure 4 As shown, the rubber ring 3 in this specific embodiment includes an integrated first rubber part 302 and a second rubber part 301, and the first rubber part 302 and the second rubber part 301 are both annular structures. The first rubber part 302 and the second rubber part 301 are coaxially arranged, and the outer walls of the first rubber part 302 and the second rubber part 301 are flush. The inner diameter of the first rubber part 302 is smaller than the inner diameter of the second rubber part 301, so that the thickness of the first rubber part 302 is greater than the thickness of the second rubber part 301, and when the rubber ring 3 is located at the socket end 501, the second rubber part 301 is closer to the placement step relative to the first rubber part 302.

[0042] Furthermore, the socket end 501 includes a first socket section and a second socket section connected to each other, and the diameter of the first socket section is larger than the diameter of the second socket section, so that the connection between the first socket section and the second socket section forms the placement step.

[0043] Furthermore, the outer sidewall of the outer cover 204 is provided with anti-slip grooves.

[0044] The same or similar reference numerals correspond to the same or similar components;

[0045] The terms used in the drawings to describe positional relationships are for illustrative purposes only and should not be construed as limiting this patent;

[0046] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. A person skilled in the art will be able to make other variations or modifications based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A riser expansion joint, characterized in that: The invention comprises a main body (5), an upper tube body (1) and a sealing mechanism, wherein one end of the main body (5) is a socket end (501), the upper tube body (1) comprises a first tube segment (102), a positioning segment (103) and a second tube segment (101) connected in sequence, the second tube segment (101) being used to be inserted into the socket end (501), the sealing mechanism being provided at the socket end (501) and being used to connect the main body (5) and the second tube segment (101), the outer diameter of the positioning segment (103) being larger than the outer diameter of the second tube segment (101), and the outer diameter of the second tube segment (101) being unequal to the outer diameter of the first tube segment (102).

2. A riser expansion joint according to claim 1, characterized in that: The outer diameter of the positioning section (103) gradually decreases from one end where the positioning section (103) is connected to the first pipe section (102) to one end where the positioning section (103) is connected to the second pipe section (101), so that the positioning section (103) is a truncated cone structure.

3. A riser expansion joint according to claim 2, characterized in that: The sealing mechanism comprises a threaded cover (2) and a rubber ring (3); the inner wall of the socket end (501) is provided with a placement step; the rubber ring is located inside the socket end (501) and on the placement step; the threaded cover (2) comprises an outer cover body (204) and an inner cover body (203); the outer cover body (204) and the inner cover body (203) are both annular structures; the inner cover body (203) is located inside the outer cover body (204); the inner cover body (203) and the outer cover body (204) are coaxially arranged, and the outer cover body (204) is provided with a placement step. The outer cover body (204) and the inner cover body (203) are connected via an intermediate cover body (205), so that a slot for the socket end (501) to be inserted is formed between the outer cover body (204) and the inner cover body (203), the outer cover body (204) is provided with an internal thread (201) on the side facing the inner cover body (203), and the socket end (501) is provided with an external thread (502), and the outer cover body (204) and the socket end (501) are threadedly connected via the internal thread (201) and the external thread (502).

4. A riser expansion joint according to claim 3, characterized in that: The top of the inner cover is provided with a positioning surface (202) that fits with the outer side wall of the positioning section (103).

5. The riser expansion joint according to claim 3, characterized in that: The length of the external thread (502) is greater than 25 mm.

6. A riser expansion joint according to claim 3, characterized in that: The inner diameter of the rubber ring (3) is smaller than the outer diameter of the second pipe section (101).

7. The riser expansion joint according to claim 3, characterized in that: The sealing mechanism further comprises a gasket (4), wherein the gasket (4) is located inside the socket end (501), and the gasket (4) is located between the inner cover (203) and the rubber ring (3).

8. The riser expansion joint according to claim 3, characterized in that: The rubber ring (3) comprises an integral first rubber portion (302) and a second rubber portion (301), the first rubber portion (302) and the second rubber portion (301) both being annular structures, the first rubber portion (302) and the second rubber portion (301) being coaxially arranged, the outer side walls of the first rubber portion (302) and the second rubber portion (301) being flush, the inner diameter of the first rubber portion (302) being smaller than the inner diameter of the second rubber portion (301), so that the thickness of the first rubber portion (302) is greater than the thickness of the second rubber portion (301), and when the rubber ring (3) is located at the socket end (501), the second rubber portion (301) is closer to the placement step relative to the first rubber portion (302).

9. The riser expansion joint according to claim 3, characterized in that: The socket end (501) comprises a first socket section and a second socket section connected to each other, wherein the diameter of the first socket section is greater than the diameter of the second socket section, so that the connection between the first socket section and the second socket section forms the placement step.

10. The riser expansion joint according to claim 3, characterized in that: The outer side wall of the outer cover (204) is provided with anti-slip grooves.

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