Novel pipe pressure test clamp
By using a modular quick-release design and an adaptive sealing structure, the pipe pressure testing fixture solves the problems of cumbersome operation, bulky size, and unstable sealing of traditional fixtures, and achieves fast and flexible pipe pressure testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGSHA WEIZHONG CHEM MACHINERY
- Filing Date
- 2025-05-14
- Publication Date
- 2026-04-24
AI Technical Summary
Traditional pipe pressure testing fixtures are cumbersome to operate, bulky, and lack sufficient sealing stability, which affects testing efficiency and adaptability.
It adopts a modular quick-release design and an adaptive sealing structure, combined with a spring self-locking mechanism to achieve quick fixation and sealing with one hand, and uses standard sealing materials to adapt to different pipe diameters.
Significantly reduces clamping time by over 80%, reduces clamping volume, improves detection flexibility and accuracy, and reduces leakage risk and maintenance costs.
Smart Images
Figure CN224163465U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pipe pressure testing fixtures, and in particular to a novel pipe pressure testing fixture. Background Technology
[0002] In the installation, maintenance, and quality inspection of industrial pipeline systems, pressure resistance testing of pipe materials is a crucial step in ensuring their safety and reliability. Traditional pipe pressure testing fixtures typically employ methods such as bolt fastening, flange connection, or mechanical clamps, but these methods suffer from the following technical drawbacks:
[0003] 1. Cumbersome operation: Traditional fixtures require manual tightening of multiple bolts or adjustment of mechanical parts, which takes a long time to install and disassemble, affecting the testing efficiency.
[0004] 2. Bulky size: The structural design is redundant, making it particularly unsuitable for small spaces or complex working conditions, and its portability is insufficient.
[0005] 3. Insufficient sealing stability: Relies on manual force, which can easily lead to leakage during pressure testing due to uneven tightening, requiring repeated adjustments. Utility Model Content
[0006] In view of the above-mentioned problems in the existing technology, this utility model provides a novel pipe pressure testing fixture to solve the problems existing in the background technology.
[0007] To achieve the above-mentioned objectives, the technical solution adopted by this utility model is as follows:
[0008] A novel pipe pressure testing fixture includes an outer sleeve, an interface seat, and a self-locking clamp. The interface seat has a medium inlet channel at its left end and a pipe inlet channel at its right end, with the right end of the medium inlet channel communicating with the left end of the pipe inlet channel. A sealing ring is provided on the inner wall of the pipe inlet channel. A spring is fitted around the right end of the interface seat. The self-locking clamp is located on the right side of the interface seat, with the right end of the spring abutting against the left end of the self-locking clamp. The outer sleeve has a first through hole penetrating both its left and right ends, and is fitted around the self-locking clamp, the spring, and the right end of the interface seat. The self-locking clamp is truncated cone-shaped, with the outer diameter of its right end smaller than that of its left end. The self-locking clamp has a second through hole penetrating both its left and right ends. The self-locking clamp includes an upper part and a lower part, and the inner surface of the right end of the first through hole is an inner circumferential surface that can fit against the outer circumferential surface of the self-locking clamp.
[0009] In one embodiment, a first ring is provided at the right end of the self-locking jaw. The first ring is composed of an upper part and a lower part. The upper part of the first ring is integrally formed with the upper part of the self-locking jaw, and the lower part of the first ring is integrally formed with the lower part of the self-locking jaw.
[0010] In one embodiment, the inner diameter of the first ring is the same as the inner diameter of the self-locking clamp, and the outer diameter is the same as the outer diameter of the right end face of the self-locking clamp.
[0011] In one embodiment, the inner edge of the right end face of the first ring is chamfered.
[0012] In one embodiment, the outer wall of the interface seat is provided with a first step and a second step, the first step is located to the left of the second step, and the outer diameter of the first step is larger than the outer diameter of the second step. The spring is fitted outside the second step, and the left end of the outer sleeve is screwed to the outer circumferential surface of the first step.
[0013] In one embodiment, the inner wall of the medium inlet channel is provided with an internal thread that can be screwed into a pipe for inputting the medium, the inner wall of the left end of the outer sleeve is provided with an internal thread that can be screwed into the outer circumferential surface of the first step, and the outer circumferential surface of the first step is provided with an external thread.
[0014] In one embodiment, the pipe inlet channel is divided into at least two segments along the left-right direction, and the inner diameter of any segment of the pipe inlet channel is smaller than the inner diameter of the pipe inlet channel located on its right side, and the sealing ring is embedded on the inner wall of each segment of the pipe inlet channel.
[0015] In one embodiment, a second ring is provided on the right side of the outer casing, and a hinge seat is provided on the top of the outer casing. The top of the second ring is hinged to the hinge seat through a connecting plate and a pin. The inner diameter of the second ring is larger than the inner diameter of the first ring and smaller than the outer diameter of the first ring.
[0016] In one embodiment, a pull rod is provided at the bottom of the second ring in the left-right direction, the upper surface of the right end of the pull rod is connected to the outer surface of the bottom of the second ring, and the pull rod is located below the outer sleeve.
[0017] Compared with the prior art, the present invention provides a novel pipe pressure testing fixture, which significantly shortens the clamping time (by more than 80% compared with the traditional method) by adopting a modular quick-release design structure and an adaptive sealing structure, and also reduces the size of the fixture, thus making it more flexible to use.
[0018] It includes the following core innovations:
[0019] 1. Quick locking mechanism: The self-locking mechanism is achieved by using a spring and pressure testing, allowing for single-handed operation to fix and seal the pipe end;
[0020] 2. Simple flexible sealing unit: Adapts to different pipe diameters using standard sealing materials available on the market, reducing leakage risk and maintenance costs.
[0021] In summary, the novel pipe pressure testing fixture provided by this utility model is particularly suitable for scenarios such as municipal engineering and petrochemical industries that require frequent on-site pressure testing. While ensuring testing accuracy, it promotes the development of testing processes towards higher efficiency and greater convenience. Attached Figure Description
[0022] Figure 1 This is a partial cross-sectional view of the present invention.
[0023] Figure 2 This is a schematic diagram of the self-locking clamp in this utility model. Detailed Implementation
[0024] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0027] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0028] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0029] like Figure 1 and 2 As shown, for ease of description, the orientation references of "up", "down", "left", "right", "front" and "rear" in this utility model are attached. Figure 1 The directions shown are for reference only;
[0030] A novel pipe pressure testing fixture includes an outer casing 1, an interface seat 2, and a self-locking clamp 3. The interface seat 2 has a medium inlet channel 21 at its left end and a pipe inlet channel 22 at its right end, with the right end of the medium inlet channel 21 communicating with the left end of the pipe inlet channel 22. A sealing ring 4 is provided on the inner wall of the pipe inlet channel 22. A spring 5 is fitted onto the outer side of the right end of the interface seat 2. The self-locking clamp 3 is located on the right side of the interface seat 2, with the right end of the spring 5 connected to the left end of the self-locking clamp 3. The outer sleeve 1 is provided with a first through hole 11 that passes through its left and right ends. The outer sleeve 1 is fitted onto the outside of the self-locking clamp 3, the spring 5 and the right end of the interface seat 2. The self-locking clamp 3 is shaped like a frustum cone, and the outer diameter of the right end of the self-locking clamp 3 is smaller than the outer diameter of its left end. The self-locking clamp 3 is provided with a second through hole 31 that passes through its left and right ends. The self-locking clamp 31 includes an upper part and a lower part. The inner surface of the right end of the first through hole 11 is an inner circumferential surface that can fit with the outer circumferential surface of the self-locking clamp 3.
[0031] In this embodiment, a first ring 6 is provided at the right end of the self-locking jaw 3. The first ring 6 is composed of an upper part and a lower part. The upper part of the first ring 6 is integrally formed with the upper part of the self-locking jaw 3, and the lower part of the first ring 6 is integrally formed with the lower part of the self-locking jaw 3.
[0032] Furthermore, the inner diameter of the first ring 6 is the same as the inner diameter of the self-locking clamp 3, and the outer diameter of the right end face of the self-locking clamp 3 is the same.
[0033] Preferably, the inner edge of the right end face of the first ring 6 is chamfered. By setting the first ring 6 and chamfering the inner edge of the right end face of the first ring 6, the first ring 6 will be located outside the outer sleeve 1 before the pipe 100 to be tested for sealing performance is inserted into the self-locking clamp 3. At the same time, the chamfering of the inner edge of the right end face of the first ring 6 makes it easier for the pipe 100 to be inserted from the right end of the first ring 6 when it is inserted.
[0034] In this embodiment, a first step 23 and a second step 24 are provided on the outer side wall of the interface seat 2. The first step 23 is located to the left of the second step 24, and the outer diameter of the first step 23 is larger than the outer diameter of the second step 24. The spring 5 is fitted on the outside of the second step 24, and the left end of the outer sleeve 1 is screwed to the outer circumferential surface of the first step 23.
[0035] Specifically, the inner wall of the medium inlet channel 21 is provided with an internal thread that can be screwed into the pipe used for inputting the medium, and the inner wall of the left end of the outer sleeve 1 is provided with an internal thread that can be screwed into the outer circumferential surface of the first step 23. The outer circumferential surface of the first step 23 is provided with an external thread. By setting the first step 23 and the second step 24, not only is the installation of the spring 5 convenient, but the connection between the first step 23 and the outer sleeve 1 is also convenient.
[0036] In this embodiment, the pipe inlet channel 22 is divided into two sections along the left-right direction. The inner diameter of the pipe inlet channel 22 located on the left end is smaller than the inner diameter of the pipe inlet channel 22 located on its right side. Sealing rings 4 are embedded on the inner walls of both pipe inlet channels 22. Because the pipe inlet channel 22 is divided into two sections, it can be used for sealing tests of at least two different outer diameter pipes 100. As shown in the attached figure, the self-locking clamp 3 of this size is suitable for sealing the pipe inlet... For the sealing test of the pipe 100 with an inner diameter at the right end of channel 22, when it is necessary to perform a sealing test on the pipe 100 with an inner diameter at the left end of pipe inlet channel 22, the outer sleeve 1 needs to be unscrewed and the self-locking clamp 3 adapted to the inner diameter of the pipe inlet channel 22 needs to be replaced. Therefore, by replacing only one part, the pipe pressure testing fixture provided by this utility model can be adapted to the sealing test of two different pipe diameters of pipe 100, thereby improving the adaptability and versatility of the pipe pressure testing fixture.
[0037] In this embodiment, a second ring 7 is provided on the right side of the outer jacket 1, and a hinge seat 8 is provided on the top of the outer jacket 1. The top of the second ring 7 is hinged to the hinge seat 8 through a connecting plate and a pin. The inner diameter of the second ring 7 is larger than the inner diameter of the first ring 6 and smaller than the outer diameter of the first ring 6.
[0038] Furthermore, a pull rod 8 is provided at the bottom of the second ring 7 along the left-right direction. The upper surface of the right end of the pull rod 8 is connected to the outer surface of the bottom of the second ring 7, and the pull rod 8 is located below the outer sleeve 1.
[0039] After the sealing test of pipe 100 is completed, pull the lever 8 to the left. The second ring 7 will then exert a leftward pushing force on the first ring 6, which will push the self-locking clamp 3 to move to the left. This will increase the gap between the upper and lower parts of the self-locking clamp 3, thereby releasing the clamp on pipe 100. At this time, pull pipe 100 to the right to remove pipe 100 from the pipe pressure test fixture.
[0040] The working process of the novel pipe pressure testing fixture provided by this utility model is as follows: First, the left end of the pipe 100 is passed through the through hole on the second ring 7, and then inserted from the right end of the first ring 6. During the insertion of the pipe 100, the pipe 100 will generate a leftward pushing force on the first ring 6. Because the upper half of the first ring 6 is integrally formed with the upper half of the self-locking clamp 3, and the lower half of the first ring 6 is integrally formed with the lower half of the self-locking clamp 3, the thrust of the spring 5 is overcome, and the self-locking clamp 3 is moved to the left as a whole. The gap between the upper half and the lower half of the self-locking clamp 3... The gap will increase, making it easier for the left end of the pipe 100 to pass through the first ring 6 and the self-locking clamp 3 in sequence until it abuts against the left side wall of the pipe inlet channel 22 at the right end of the interface seat 2. Since the inner wall of the pipe inlet channel 22 is embedded with a sealing ring 4, the sealing ring 4 will seal the gap between the pipe inlet channel 22 and the pipe 100. At this time, under the rightward push of the spring 5, the self-locking clamp 3 is divided into upper and lower halves and its outer diameter at the left end is larger than its outer diameter at the right end. The upper half and the lower half of the self-locking clamp 3 come closer to each other, thereby achieving the clamping and fixing of the pipe 100.
[0041] Then, the pipe used for inputting the sealing test medium is screwed into the medium inlet channel 21, thereby realizing the connection between the sealing test equipment and the pipe 100. Finally, the sealing test equipment is used to complete the sealing test on the pipe 100. After the sealing test on the pipe 100 is completed, the pull rod 8 is pulled to the left, and the second ring 7 will generate a leftward push on the first ring 6, thereby pushing the self-locking clamp 3 to overcome the push of the spring 5 and move to the left as a whole. As a result, the tendency of the upper and lower parts of the self-locking clamp 3 to move closer to each other will disappear, so the clamping force of the self-locking clamp 3 on the pipe 100 will disappear, and the clamping of the pipe 100 will be released. At this time, pulling the pipe 100 to the right will pull the pipe 100 out of the pipe pressure test fixture.
[0042] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0043] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A novel pipe pressure testing fixture, characterized in that, The device includes an outer casing, an interface seat, and a self-locking clamp. The interface seat has a medium inlet channel at its left end and a pipe inlet channel at its right end, with the right end of the medium inlet channel communicating with the left end of the pipe inlet channel. A sealing ring is provided on the inner wall of the pipe inlet channel. A spring is fitted around the right end of the interface seat. The self-locking clamp is located on the right side of the interface seat, with the right end of the spring abutting against the left end of the self-locking clamp. The outer casing has a first through hole penetrating both its left and right ends, and is fitted over the self-locking clamp, the spring, and the right end of the interface seat. The self-locking clamp is truncated cone-shaped, with the outer diameter of its right end smaller than that of its left end. The self-locking clamp has a second through hole penetrating both its left and right ends. The self-locking clamp includes an upper part and a lower part, and the inner surface of the right end of the first through hole is an inner circumferential surface that can fit against the outer circumferential surface of the self-locking clamp.
2. The novel pipe pressure testing fixture according to claim 1, characterized in that, The right end of the self-locking clamp is provided with a first ring, which is composed of an upper part and a lower part. The upper part of the first ring is integrally formed with the upper part of the self-locking clamp, and the lower part of the first ring is integrally formed with the lower part of the self-locking clamp.
3. The novel pipe pressure testing fixture according to claim 2, characterized in that, The inner diameter of the first ring is the same as the inner diameter of the self-locking clamp, and the outer diameter is the same as the outer diameter of the right end face of the self-locking clamp.
4. A novel pipe pressure testing fixture according to claim 3, characterized in that, The inner edge of the right end face of the first ring is chamfered.
5. A novel pipe pressure testing fixture according to claim 1, characterized in that, The outer wall of the interface seat is provided with a first step and a second step. The first step is located to the left of the second step, and the outer diameter of the first step is larger than the outer diameter of the second step. The spring is fitted outside the second step, and the left end of the outer sleeve is screwed to the outer circumferential surface of the first step.
6. A novel pipe pressure testing fixture according to claim 5, characterized in that, The inner wall of the medium inlet channel is provided with an internal thread that can be screwed into a pipe used for inputting the medium. The inner wall of the left end of the outer sleeve is provided with an internal thread that can be screwed into the outer circumferential surface of the first step. The outer circumferential surface of the first step is provided with an external thread.
7. A novel pipe pressure testing fixture according to claim 5, characterized in that, The pipe inlet channel is divided into at least two sections along the left-right direction, and the inner diameter of any section of the pipe inlet channel is smaller than the inner diameter of the section of the pipe inlet channel located on its right side. The sealing ring is embedded on the inner wall of each section of the pipe inlet channel.
8. A novel pipe pressure testing fixture according to claim 2, characterized in that, A second ring is provided on the right side of the outer casing, and a hinge seat is provided on the top of the outer casing. The top of the second ring is hinged to the hinge seat through a connecting plate and a pin. The inner diameter of the second ring is larger than the inner diameter of the first ring and smaller than the outer diameter of the first ring.
9. A novel pipe pressure testing fixture according to claim 8, characterized in that, A pull rod is provided at the bottom of the second ring along the left-right direction. The upper surface of the right end of the pull rod is connected to the outer surface of the bottom of the second ring, and the pull rod is located below the outer sleeve.