Pipeline flange blind plate structure under action of water hammer

Abstract

The utility model is suitable for the field of pipeline engineering, and discloses a pipeline flange blind plate structure under the action of a water hammer, which comprises a blind plate used for blocking a pipeline outlet, a lap joint flange assembly used for fixing the blind plate on a pipeline, and a connecting assembly used for connecting and fixing the blind plate and the lap joint flange assembly, a pipe orifice flange connecting pipe fitting is arranged at an outlet of the pipeline; a through hole is formed in the blind plate; when the blind plate blocks the pipeline, the through hole is communicated with the space in the pipeline; the lap joint flange assembly is connected to the pipeline in a sleeving mode and abuts against the pipe opening flange connecting type pipe fitting, and the lap joint flange assembly and the blind plate are connected and fixed through the connecting assembly.

Description

Technical Field

[0001] This utility model relates to the field of pipeline engineering, and in particular to a pipeline flange blind plate structure subjected to water hammer. Background Technology

[0002] Currently, the inlet and outlet main pipes of the water pumps in the domestic water supply network of nuclear power plants are all made of PE material. There is an air accumulation section in the water pump outlet main pipe. The original pipeline design did not set up an venting point, and it is impossible to vent the air when the pipeline is emptied and put back into operation. Therefore, when the water pump starts, the high pressure liquid and the accumulated air will generate water hammer in the pipeline system. The pressure generated by the water hammer is higher than the system design pressure. The original pipeline design did not take into account the water hammer condition. The water pumps start and stop frequently on site, the water hammer force at the sealing blind flange of the water pipe increases, and the flange fixing the blind flange is prone to deformation under the water hammer, resulting in the potential for leakage.

[0003] Furthermore, because the PE flange connector and PE pipe are integrally molded, the flange sleeve cannot be removed. Replacing the flange or adding an venting point requires replacing the entire PE flange connector and PE pipe, which is a large-scale replacement, affects the plant's water supply, and is extremely costly. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a pipe flange blind plate structure subjected to water hammer.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: A pipe flange blind plate structure subjected to water hammer is constructed, comprising: a blind plate for sealing the pipe outlet, a loose flange assembly for fixing the blind plate to the pipe, and a connecting assembly for connecting and fixing the blind plate and the loose flange assembly; a pipe flange connection type pipe fitting is provided at the outlet of the pipe; a through hole is provided on the blind plate; wherein, when the blind plate seals the pipe, the through hole communicates with the internal space of the pipe; the loose flange assembly is sleeved on the pipe and abuts against the pipe flange connection type pipe fitting, and the connecting assembly connects and fixes the loose flange assembly to the blind plate.

[0006] In some embodiments, the blind flange has a drain pipe on the side away from the pipe, and the drain pipe is connected to the through hole.

[0007] In some embodiments, the loose flange assembly includes two semi-circular flanges, which are combined to form a circular flange that fits onto the pipe.

[0008] In some embodiments, the loose flange assembly consists of two or more sets, and several pairs of semi-circular arc flanges are combined and fitted onto the pipeline. After fitting, the semi-circular arc flanges are staggered from the semi-circular arc flanges fitted on both sides, and the ends of the semi-circular arc flanges are stacked perpendicularly to the ends of the adjacent semi-circular arc flanges.

[0009] In some embodiments, the semi-circular flange is provided with a plurality of evenly distributed fixing holes, and the blind plate is provided with a plurality of connecting holes that match the positions of the fixing holes.

[0010] In some embodiments, the fixing hole is located outside the coverage area of ​​the pipe flange connection type fitting.

[0011] In some embodiments, the connecting assembly includes a bolt and a nut, the bolt passing through the connecting hole and the fixing hole and the nut abutting against the semi-circular flange and locking it in place.

[0012] In some embodiments, a spring and a washer are provided at the contact point between the nut and the semi-circular flange, the washer abutting against the semi-circular flange, and the spring is disposed between the nut and the washer.

[0013] In some embodiments, the outer diameter of the circular flange formed by the two semi-circular flanges is the same as the outer diameter of the blind flange.

[0014] In some embodiments, the inner diameter of the semi-circular flange matches the outer diameter of the pipe.

[0015] The present invention provides a pipe flange blind plate structure subjected to water hammer, which has the following advantages: by setting through holes in the blind plate, when liquid mixed with gas impacts the blind plate, the gas and liquid will be discharged in time, and water hammer will not be generated on the entire pipeline. In addition, the blind plate is fixed to the pipeline by the loose flange assembly, which is convenient to install, has a simple structure, and allows for quick replacement of the blind plate and the loose flange assembly. Attached Figure Description

[0016] To more clearly illustrate the technical solution of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show some embodiments of this utility model and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort. In the drawings:

[0017] Figure 1 This is an overall view of a pipe flange blind plate structure subjected to water hammer in one embodiment of this utility model;

[0018] Figure 2This is a structural diagram of a pipe flange blind plate structure subjected to water hammer in one embodiment of this utility model, with the semi-circular arc flange removed;

[0019] Figure 3 This is a rear view of a pipe flange blind plate structure subjected to water hammer in one embodiment of this utility model;

[0020] Figure 4 This is a pipe diagram of a pipe flange blind plate structure subjected to water hammer in one embodiment of this utility model;

[0021] Figure 5 This is a structural diagram of a pipe flange blind plate structure subjected to water hammer in one embodiment of this utility model, with one connecting component removed.

[0022] Figure Labels

[0023] 100. Pipe; 110. Pipe fittings with flange connections; 200. Loose flange assembly; 210. Semi-circular flange; 220. Fixing hole; 300. Connection assembly; 310. Bolt; 320. Nut; 330. Spring; 340. Gasket; 400. Blind flange; 410. Through hole; 420. Connection hole. Detailed Implementation

[0024] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "upper," "inner," and "outer" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or component referred to must have a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0025] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "fixing," and "setting" 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. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0026] Figures 1 to 4 Some preferred embodiments of this utility model are shown. The blind flange structure of the pipe fitting 110 subjected to water hammer can be used to mitigate the water hammer effect in sections of the piping system 100 where air accumulates.

[0027] Figures 1 to 5 This invention illustrates a blind flange structure for a pipe fitting 110 subjected to water hammer in one embodiment of the present invention. It may include a blind flange 400 for sealing the outlet of a pipe 100, a loose flange assembly 200 for fixing the blind flange 400 to the pipe 100, and a connecting assembly 300 for connecting and fixing the blind flange 400 and the loose flange assembly 200. The pipe fitting 110 is provided at the outlet of the pipe 100. The blind flange 400 has a through hole 410. When the blind flange 400 seals the pipe 100, the through hole 410 communicates with the internal space of the pipe 100. The loose flange assembly 200 is sleeved on the pipe 100 and abuts against the pipe fitting 110. The connecting assembly 300 connects and fixes the loose flange assembly 200 to the blind flange 400. By setting through holes 410 in the blind flange 400, when liquid-gas mixture impacts the blind flange 400, the gas and liquid will be discharged in time, and water hammer will not be generated on the entire pipeline 100. In addition, the blind flange 400 is fixed to the pipeline 100 through the loose flange assembly 200, which is easy to install, has a simple structure, and allows for quick replacement of the blind flange and loose flange assembly.

[0028] In one specific embodiment, the pipe 100 and the flange connection fitting 110 are both made of polypropylene (PE), and the loose flange assembly 200 and the blind flange 400 are made of Q235 material.

[0029] In one specific embodiment, an elastic sealing gasket is provided between the blind flange 400 and the pipe flange connection fitting 110 for sealing.

[0030] Furthermore, the elastic sealing gasket material is EPDM rubber.

[0031] In one specific embodiment, the size of the through hole 410 depends on the amount of air in the gas accumulation section inside the gate and the size of the pipe 100. If it is too small, it is easy to cause noise; if it is too large, it is easy to cause leakage.

[0032] Figure 3 The blind flange 400, as shown in one embodiment, may include a drain pipe on the side of the blind flange 400 away from the conduit 100. The drain pipe is connected to the through hole 410 and is used to drain water and air overflowing from the through hole 410 to a designated place to avoid wetting other places.

[0033] Figures 1 to 3 The loose flange assembly 200 is shown in one embodiment and may include two semi-circular flanges 210. The two semi-circular flanges 210 are combined to form a circular flange that is fitted onto the pipe 100. Because the existing pipe flange connection type pipe fitting 110 and pipe 100 are integrated and cannot be fixed by welding or gluing, the loose flange assembly 200 needs to be disassembled into two parts and combined on the pipe 100 and fixed to the blind flange 400.

[0034] Figure 2 The loose flange assembly 200 shown in one embodiment may include two or more sets of the loose flange assembly 200, and several pairs of semi-circular arc flanges 210 are combined and fitted onto the pipe 100. After fitting, the semi-circular arc flanges 210 are staggered from the semi-circular arc flanges 210 fitted on both sides. The ends of the semi-circular arc flanges 210 are stacked perpendicularly to the ends of the adjacent semi-circular arc flanges 210 and staggered from each other. Because only one set of semi-circular arc flanges 210 is prone to deformation to both sides due to force, making it impossible for the blind flange 400 to seal the pipe 100, adding multiple sets of semi-circular arc flanges 210 can ensure that the force is balanced in all directions and will not deform.

[0035] Figure 1 and Figure 2 The semi-circular flange 210 shown in one embodiment may include a plurality of evenly distributed fixing holes 220 on the semi-circular flange 210, and a plurality of connecting holes 420 on the blind plate 400 that match the positions of the fixing holes 220, with the fixing holes 220 and the connecting holes 420 cooperating with each other.

[0036] Figure 1In one embodiment, the fixing hole 220 may be located outside the coverage area of ​​the pipe flange connection type fitting 110 to prevent the connector from being interfered with by the pipe flange connection type fitting 110, which would prevent the semi-circular flange 210 and the blind plate 400 from being fixed.

[0037] Figure 1 The connecting assembly 300 is shown in one embodiment to include a bolt 310 and a nut 320, the bolt 310 passing through the connecting hole 420 and the fixing hole 220 and the nut 320 abutting against the semi-circular flange 210 and locking it in place.

[0038] Figure 1 The connecting assembly 300, in one embodiment, may include a spring 330 and a gasket 340 at the contact point between the nut 320 and the semi-circular flange 210. The gasket 340 abuts against the semi-circular flange 210. The spring 330 is disposed between the nut 320 and the gasket 340. The spring 330 and the gasket 340 can provide a rebound force on the nut 320, preventing the nut 320 from easily loosening.

[0039] Figures 1 to 5 The semi-circular flange 210 is shown in one embodiment, which may include two of the semi-circular flanges 210 forming a circular flange with the same outer diameter as the blind flange 400.

[0040] In one specific embodiment, the dimensions of the blind flange 400 and the loose flange assembly 200 are both determined by the actual external dimensions of the pipe 100.

[0041] Furthermore, the outer diameter of the blind flange 400 and the loose flange assembly 200 is φ340±0.2, and the inner diameter of the loose flange assembly 200 is φ226±0.2.

[0042] It is understood that the above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. A pipe flange blind plate structure subjected to water hammer, characterized in that, include: A blind flange (400) for sealing the outlet of a pipe (100), a loose flange assembly (200) for fixing the blind flange (400) to the pipe (100), and a connecting assembly (300) for connecting and fixing the blind flange (400) and the loose flange assembly (200). The outlet of the pipe (100) is provided with a flange-type pipe fitting (110); The blind plate (400) is provided with a through hole (410); When the blind flange (400) blocks the pipe (100), the through hole (410) connects to the space inside the pipe (100); the loose flange assembly (200) is sleeved on the pipe (100) and abuts against the pipe flange connection fitting (110); the connecting assembly (300) connects and fixes the loose flange assembly (200) to the blind flange (400).

2. The pipe flange blind plate structure subjected to water hammer according to claim 1, characterized in that, The blind plate (400) has a drain pipe on the side away from the pipe (100), and the drain pipe is connected to the through hole (410).

3. The pipe flange blind plate structure subjected to water hammer according to claim 1, characterized in that, The loose flange assembly (200) includes two semi-circular flanges (210), which are combined to form a circular flange that fits onto the pipe (100).

4. A pipe flange blind plate structure subjected to water hammer according to claim 3, characterized in that, The slip-on flange assembly (200) consists of two or more sets, and several pairs of the semi-circular arc flanges (210) are combined and fitted onto the pipe (100). After fitting, the semi-circular arc flanges (210) are staggered from the semi-circular arc flanges (210) fitted on both sides, and the ends of the semi-circular arc flanges (210) are stacked perpendicularly to the ends of the adjacent semi-circular arc flanges (210).

5. A pipe flange blind plate structure subjected to water hammer according to claim 4, characterized in that, The semi-circular flange (210) is provided with a number of evenly distributed fixing holes (220), and the blind plate (400) is provided with a number of connecting holes (420) that match the positions of the fixing holes (220).

6. A pipe flange blind plate structure subjected to water hammer according to claim 5, characterized in that, The fixing hole (220) is located outside the coverage area of ​​the pipe flange connection type fitting (110).

7. A pipe flange blind plate structure subjected to water hammer according to claim 5, characterized in that, The connecting assembly (300) includes a bolt (310) and a nut (320), the bolt (310) passing through the connecting hole (420) and the fixing hole (220) and the nut (320) abutting against the semi-circular flange (210) and locking it in place.

8. A pipe flange blind plate structure subjected to water hammer according to claim 7, characterized in that, A spring piece (330) and a gasket (340) are provided at the contact point between the nut (320) and the semi-circular flange (210). The gasket (340) abuts against the semi-circular flange (210), and the spring piece (330) is disposed between the nut (320) and the gasket (340).

9. A pipe flange blind plate structure subjected to water hammer according to claim 3, characterized in that, The outer diameter of the circular flange formed by the two semi-circular flanges (210) is the same as the outer diameter of the blind plate (400).

10. A pipe flange blind plate structure subjected to water hammer according to claim 3, characterized in that, The inner diameter of the semi-circular flange (210) matches the outer diameter of the pipe (100).

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