Negative pressure rubber joint
By using arc-shaped support strips, circumferential support strips, reinforcement ribs and annular metal mesh in the rubber joint, the problem of deformation and blockage of the rubber joint under a negative pressure environment is solved, and the efficient anti-negative pressure and fluid smoothness of the joint are achieved.
Patent Information
- Application Number
- CN202422054514.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-23
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-08-23
AI Technical Summary
Existing rubber joints are prone to deformation when subjected to negative pressure in the pipeline, resulting in blockage of the pipeline and affecting the normal flow of fluid.
A negative pressure rubber joint was designed, using arc-shaped support strips, circumferential support strips, reinforced ribs and annular metal mesh to effectively resist negative pressure deformation through these structures to ensure the stability and fluid smoothness of the joint.
It enhances the anti-negative pressure characteristics of the rubber joint, prevents deformation and blockage, ensures the normal circulation of fluid in the pipeline, and extends the service life of the joint.
Smart Images
Figure CN222911082U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pipeline joints, and particularly relates to a negative pressure rubber joint. Background Art
[0002] The flexible rubber joint is also called shock absorber, flexible joint, rubber flexible connection, pipeline shock absorber, etc. It can solve the problems of neck offset, axial expansion and non - concentricity of various pipelines, and is often used in the water supply and drainage projects of civil buildings, the connection of pipeline units in the fire protection pipe network pump house, the connection of sewage treatment pipelines, the transportation of high - pressure gas - liquid chemical media, etc. The existing rubber joint has a simple structure and single material used. When it is subjected to negative pressure in the pipeline, it is easy to deform, thus blocking the pipeline and affecting the normal flow of the fluid in the pipeline. Content of the Utility Model
[0003] Aiming at the problems existing above, the utility model specifically designs a negative pressure rubber joint to enhance the anti - negative pressure characteristics of the rubber joint.
[0004] To achieve the above object, the utility model provides a negative pressure rubber joint, which includes a joint body and a joint flange. The joint body includes an arc portion and a limiting portion. The limiting portions are symmetrically and fixedly arranged at both ends of the arc portion. The arc portion is fixedly connected with a first anti - negative pressure member. The limiting portion is provided with a limiting block, and the limiting block is clamped with a second anti - negative pressure member. The joint flange is sleeved outside the joint body, and the joint flange is provided with threaded holes and is fixedly connected with a pipeline through fasteners.
[0005] Preferably, the arc portion includes multiple layers of polytetrafluoroethylene rubber layers fixedly connected in sequence.
[0006] Preferably, the first anti - negative pressure member includes arc - shaped support bars and circumferential support bars. There are multiple groups of arc - shaped support bars, which are pressed between the polytetrafluoroethylene rubber layers. The circumferential support bars are arranged inside the arc portion, and each end point penetrates through the polytetrafluoroethylene rubber layer and is fixedly connected with the arc - shaped support bars.
[0007] Preferably, the circumferential support bars are fixedly connected with reinforcing rib bars.
[0008] Preferably, the second anti - negative pressure member is an annular metal mesh, and the limiting block is clamped in the grid of the annular metal mesh.
[0009] Preferably, the limiting portion is provided with an annular limiting groove, and the joint flange is provided with a limiting strip matching the annular limiting groove.
[0010] In summary, the utility model has the following advantages and beneficial technical effects:
[0011] 1. In the present utility model, the first anti-negative pressure member and the second anti-negative pressure member are utilized to enhance the anti-negative pressure characteristics of the rubber joint. Among them, the arc-shaped support strip has high strength, effectively resists the deformation negative pressure, and at the same time ensures that the rubber joint plays an axial shock-absorbing role; the circumferential support strip provides support force for the arc-shaped support strip, restricts the expansion range of the arc-shaped part, and further resists the deformation negative pressure; the reinforcing rib is used to increase the strength of the joint surface in the circumferential support strip and improve the structural stability; the cooperation of the annular metal mesh and the limit block effectively supports the pipe orifice of the limit part, reduces the deformation, and ensures the normal fluid transportation after the rubber joint is connected to the pipeline.
[0012] 2. In the present utility model, the cooperation of the annular limit groove and the limit strip is used to improve the stability of the connection between the joint body and the joint flange. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] The above and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:
[0014] Figure 1 is the usage state diagram of the present utility model;
[0015] Figure 2 is the cross-sectional schematic view in the main view direction of the present utility model;
[0016] Figure 3 is the structural schematic view of the first anti-negative pressure member in the present utility model;
[0017] Figure 4 is the partial cross-sectional schematic view in the top view direction of the present utility model;
[0018] Figure 5 is along Figure 4 the partial enlarged view taken at A in
[0019] The reference numerals in the drawings are:
[0020] 1, joint body; 11, arc-shaped part; 12, limit part; 13, limit block;
[0021] 2, joint flange; 21, threaded hole; 22, limit strip;
[0022] 3, first anti-negative pressure member; 31, arc-shaped support strip; 32, circumferential support strip; 33, reinforcing rib;
[0023] 4, second anti-negative pressure member; 5, pipeline. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0024] The following further describes the present utility model in detail in conjunction with the attached Figures 1 - 5 drawings:
[0025] As Figures 1 - 2As shown in the figure, this embodiment discloses a negative pressure rubber joint, which includes a joint body 1 and a joint flange 2. The joint body 1 includes an arc portion 11 and a limiting portion 12. There are two groups of limiting portions 12, which are symmetrically arranged and fixedly connected to both ends of the arc portion 11. The arc portion 11 is fixedly connected with a first negative pressure resistant member 3. A plurality of limiting blocks 13 are integrally formed on the outer wall of the limiting portion 12 by hot pressing. The limiting blocks 13 are clamped with a second negative pressure resistant member 4. The joint flange 2 is sleeved outside the limiting portion 12, and the joint flange 2 is provided with threaded holes 21, and a pipeline 5 is fixedly connected by using fastening bolts; the arc portion 11 includes three layers of polytetrafluoroethylene rubber layers formed by sequential hot pressing.
[0026] As Figure 3 shown, the first negative pressure resistant member 3 includes a metal arc support bar 31 and a metal circumferential support bar 32. There are six groups of arc support bars 31, which are evenly pressed between a group of adjacent polytetrafluoroethylene rubber layers and match the radian of the arc portion 11. The circumferential support bar 32 is arranged inside the arc portion 11, and six endpoints respectively penetrate the inner polytetrafluoroethylene rubber layer and are fixedly connected to the corresponding arc support bar 31; Metal reinforcing ribs 33 are welded between adjacent long strips in the circumferential support bar 32.
[0027] As Figures 4 - 5 shown, the second negative pressure resistant member 4 is an annular metal net. The annular metal net is sleeved on the outer wall of the limiting portion 12, and at the same time, the limiting blocks 13 are clamped in the meshes of the annular metal net; The limiting portion 12 is provided with an annular limiting groove, and the joint flange 2 is integrally formed and fixed with a limiting strip 22 matching the annular limiting groove.
[0028] The working principle of a negative pressure rubber joint of the present utility model is as follows:
[0029] In this joint, a polytetrafluoroethylene rubber layer is adopted. By virtue of the chemical stability, wear resistance, high temperature resistance and other characteristics of the polytetrafluoro material, the service life of the rubber joint is extended. When the pipeline 5 is in a negative pressure environment, the metal arc support bar 31 resists the negative pressure deformation of the arc portion 11, and at the same time, the circumferential support bar 32 supports the arc support bar 31, effectively limiting the expansion range of the arc portion 11; The annular metal net has a stable structure, effectively supports and pulls the limiting blocks 13, realizes the negative pressure resistance of the limiting portion 12, and ensures the normal flow of the fluid in the pipeline 5.
[0030] The above are all the preferred embodiments of the present utility model. The protection scope of the present utility model is not limited by this. Therefore, all equivalent changes made according to the structure, shape and principle of the present utility model should be covered within the protection scope of the present utility model.
Claims
1. A negative pressure rubber joint, characterized in that: It includes a joint body and a joint flange, the joint body includes an arc-shaped portion and a limiting portion, the limiting portions are symmetrically and fixedly arranged at both ends of the arc-shaped portion, the arc-shaped portion is fixedly connected with a first anti-negative pressure component, the limiting portion is additionally provided with a limiting block, the limiting block is clamped with a second anti-negative pressure component, the joint flange is sleeved outside the joint body, and the joint flange is provided with a threaded hole, and the connecting pipe is fixedly connected by a fastener.
2. A negative pressure rubber joint according to claim 1, characterized in that: The arc-shaped portion includes multiple layers of polytetrafluoroethylene rubber layers that are fixedly connected in sequence.
3. A negative pressure rubber joint according to claim 2, characterized in that: The first anti-negative pressure component includes arc support bars and circumferential support bars. The arc support bars have multiple groups and are crimped between the polytetrafluoroethylene rubber layers. The circumferential support bars are arranged on the inner side of the arc portion, and each end point passes through the polytetrafluoroethylene rubber layer to fix the arc support bars.
4. A negative pressure rubber joint according to claim 3, characterized in that: The circumferential support strips are fixedly connected to the reinforcing ribs.
5. The negative pressure rubber joint according to claim 4, characterized in that: The second anti-negative pressure member is an annular metal mesh, and the limiting block is clamped in the mesh of the annular metal mesh.
6. The negative pressure rubber joint according to claim 5, characterized in that: The limiting portion is provided with an annular limiting groove, and the joint flange is provided with a limiting strip matching the annular limiting groove.