Valve port and pull rod structure of blow-off valve

Abstract

The utility model relates to the technical field of natural gas transportation and distribution, in particular to a relief valve port and pull rod structure which comprises a relief valve shell, a relief valve port is arranged in the relief valve shell, a guide component is fixedly installed in the middle of the relief valve port, and a relief pull rod is inserted in the guide component. A relief valve pad support is arranged in the relief valve shell, a relief valve port pad is arranged in the relief valve pad support, a relief membrane is arranged on the surface of the relief valve shell, through openings are formed in the surfaces of the relief membrane, the relief valve pad support and the relief valve port pad, one end of the relief pull rod penetrates through the multiple through openings, and the other end of the relief pull rod penetrates through the multiple through openings. And a fixing part is fixed with the blow-off valve port. On the basis of an original relief structure, the design of a relief valve port is modified, a guide structure is additionally arranged, and after the relief valve port is opened and the relief valve begins to perform relief work, the relief valve port pad and the relief valve port pad are limited to move in the radial direction and cannot make hard contact with the relief valve port to generate collision while the relief amount and product work are not affected.

Description

Technical Field

[0001] The utility model relates to the technical field of natural gas transmission and distribution, in particular to a blow-off valve orifice and tie rod structure. Background Art

[0002] During the design process of the current pressure regulating cabinet, in order to avoid the problem that the cut-off valve of the pressure regulator is frequently cut off due to pressure fluctuations, a blow-off valve needs to be installed to adjust the downstream pressure fluctuations.

[0003] During actual use, due to various reasons, the performance of the pressure regulator may be unstable, resulting in frequent instability of the downstream pressure and flow. The blow-off valve needs to work frequently, and even the blow-off diaphragm vibrates at a high frequency, leading to the loosening and falling off of the original component structure of the blow-off valve, and the collision between the valve pad support and the valve orifice. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the following disadvantages in the prior art. When the existing blow-off valve works frequently, the blow-off diaphragm vibrates at a high frequency, resulting in the loosening and falling off of the original component structure of the blow-off valve, and the collision between the valve pad support and the valve orifice. A blow-off valve orifice and tie rod structure is proposed.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A blow-off valve orifice and tie rod structure, including a blow-off valve housing, a blow-off valve orifice is arranged inside the blow-off valve housing, a guiding component is fixedly installed in the middle of the blow-off valve orifice, and a blow-off tie rod is inserted into the guiding component;

[0007] A blow-off valve pad support is arranged inside the blow-off valve housing, a blow-off valve orifice pad is arranged inside the blow-off valve pad support, a blow-off diaphragm is arranged on the surface of the blow-off valve housing, through holes are formed on the surfaces of the blow-off diaphragm, the blow-off valve pad support and the blow-off valve orifice pad, one end of the blow-off tie rod passes through a plurality of through holes and is fixed to the blow-off valve orifice through a fixing component, and the surface of the blow-off tie rod abuts against the surface of the blow-off valve orifice pad.

[0008] Preferably, the fixing component includes a locking nut, a thread is formed on the surface of one end of the blow-off tie rod, the locking nut is threadedly installed on the blow-off tie rod, and the surface abuts against the surface of the blow-off diaphragm.

[0009] Preferably, a plurality of sealing gaskets are fixedly installed on the surface of the blow-off valve orifice, and the plurality of sealing gaskets are arranged in a circumferential shape.

[0010] Preferably, both the blow-off valve orifice and the blow-off valve housing are made of stainless steel.

[0011] Preferably, the guiding component is a guiding sleeve fixedly installed in the blow-off valve port, and the blow-off pull rod is slidably inserted into the guiding sleeve.

[0012] Preferably, the guiding sleeve is made of polytetrafluoroethylene.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. On the basis of the original blow-off structure, the design of the blow-off valve port is modified, and a guiding structure is added. Without affecting the blow-off volume and the operation of the product, after the blow-off valve port opens and the blow-off valve starts to work, the movement of the blow-off valve port gasket and the blow-off valve port gasket in the radial direction is restricted, and hard contact with the blow-off valve port cannot occur, thus preventing knocking.

[0015] 2. A guiding sleeve made of polytetrafluoroethylene is added, and at the same time, the blow-off valve housing and the blow-off valve port are replaced with stainless steel materials to prevent sparks caused by friction and knocking during the operation of the blow-off valve, thus avoiding gas accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 FIG. is a front cross-sectional structure schematic diagram of a blow-off valve port and a pull rod structure proposed by the present utility model;

[0017] Figure 2 FIG. is a front cross-sectional structure schematic diagram of a blow-off valve port and a pull rod structure in the prior art;

[0018] Figure 3 FIG. is a front structure schematic diagram of a blow-off valve port in a blow-off valve port and a pull rod structure proposed by the present utility model;

[0019] Figure 4 FIG. is a side structure schematic diagram of a blow-off valve port in a blow-off valve port and a pull rod structure proposed by the present utility model;

[0020] Figure 5 FIG. is a side structure schematic diagram of a blow-off valve port in the prior art;

[0021] Figure 6 FIG. is a front structure schematic diagram of a blow-off pull rod in a blow-off valve port and a pull rod structure proposed by the present utility model.

[0022] In the figure: 1 blow-off valve housing, 2 blow-off valve gasket support, 3 blow-off valve port gasket, 4 blow-off valve port, 5 guiding sleeve, 6 blow-off pull rod, 7 blow-off diaphragm, 8 locking nut, 9 sealing gasket. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0024] In the present utility model, terms such as "upper", "lower", "left", "right", "middle" and "one" cited are only for the sake of clarity in narration, rather than used to limit the scope of implementation of the present utility model. The change or adjustment of their relative relationship, without substantial change in technical content, should also be regarded as the scope of implementation of the present utility model.

[0025] Refer to Figures 1 - 6 , a blow-off valve orifice and pull rod structure, including a blow-off valve housing 1, a blow-off valve orifice 4 is arranged inside the blow-off valve housing 1, a guiding component is fixedly installed in the middle of the blow-off valve orifice 4, a blow-off pull rod 6 is inserted into the guiding component, and burr removal processes are required for the sharp edges on the surfaces of the blow-off pull rod 6 and the blow-off valve orifice 4;

[0026] A blow-off valve gasket support 2 is arranged inside the blow-off valve housing 1, a blow-off valve orifice gasket 3 is arranged inside the blow-off valve gasket support 2, a blow-off diaphragm 7 is arranged on the surface of the blow-off valve housing 1, through openings are provided on the surfaces of the blow-off diaphragm 7, the blow-off valve gasket support 2 and the blow-off valve orifice gasket 3. One end of the blow-off pull rod 6 passes through a plurality of through openings and is fixed to the blow-off valve orifice 4 through a fixing component. The fixing component includes a locking nut 8. Threads are provided on the surface of one end of the blow-off pull rod 6, the locking nut 8 is threadedly installed on the blow-off pull rod 6, and its surface abuts against the surface of the blow-off diaphragm 7. The surface of the blow-off pull rod 6 abuts against the surface of the blow-off valve orifice gasket 3;

[0027] During the working process of the pressure regulating cabinet, gas flows in through the inlet pipeline, after the pressure is regulated by the pressure regulator, it flows out through the outlet to the downstream pipeline. Under normal circumstances, the blow-off valve is in a closed state. When the upstream gas pressure fluctuates, although the pressure regulator regulates the pressure, the downstream gas pressure will still fluctuate within a small range. When the pressure rises to the set blow-off pressure, the blow-off valve opens to appropriately reduce the pressure in the pipeline to prevent the downstream pressure from rising to the cut-off pressure and triggering the cut-off valve to cut off. When the downstream pressure rises due to the failure of the pressure regulator, the self-blowing of the blow-off valve cannot reduce the downstream pressure, and then the pressure rises to the cut-off pressure, triggering the cut-off valve to block the gas flow in the pipeline, thereby protecting downstream equipment and personnel and ensuring gas use safety;

[0028] On the original blow-off structure, the design of the blow-off valve orifice 4 is modified, and a guiding component is added. Without affecting the blow-off volume and the operation of the product, after the blow-off valve orifice 4 opens the blow-off valve to start the blow-off operation, the radial movement of the blow-off valve orifice gasket 3 and the blow-off valve gasket support 2 is restricted, and they cannot form a hard contact with the blow-off valve orifice 4 to cause knocking.

[0029] A plurality of sealing gaskets 9 are fixedly installed on the surface of the blow-off valve orifice 4, the plurality of sealing gaskets 9 are arranged in a circumferential shape, and the sealing gaskets 9 are made of elastic materials;

[0030] While multiple gaskets 9 achieve a sealing effect, they also have a certain buffering and shock-absorbing effect, reducing the acting force when the wall of the relief valve port 4 presses against the surface of the relief valve housing 1.

[0031] The guiding component is a guide sleeve 5 fixedly installed in the relief valve port 4. The relief valve rod 6 is slidably inserted into the guide sleeve 5, and the material of the guide sleeve 5 is polytetrafluoroethylene. Both the relief valve port 4 and the relief valve housing 1 are made of stainless steel;

[0032] Adding the guide sleeve 5 made of polytetrafluoroethylene and replacing the relief valve housing 1 and the relief valve port 4 with stainless steel can prevent sparks caused by friction and bumping during the operation of the relief valve, thus avoiding gas accidents.

[0033] In the present utility model, on the basis of the original relief structure, the design of the relief valve port 4 is modified, and a guiding component is added. Without affecting the relief volume and the operation of the product, after the relief valve port 4 opens and the relief valve starts to relieve, the movement of the relief valve port gasket 3 and the relief valve gasket support 2 in the radial direction is restricted, preventing hard contact and bumping with the relief valve port 4.

[0034] In the present utility model, unless otherwise clearly defined and limited, terms such as "installed", "connected", "connected to", "fixed" should be understood in a broad sense.

[0035] The above is only a preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, making equivalent replacements or changes, should be covered by the protection scope of the present utility model.

Claims

1. A relief valve port and pull rod structure, comprising a relief valve housing (1), characterized in that: A relief valve port (4) is provided in the relief valve housing (1), a guide component is fixedly installed in the middle of the relief valve port (4), and a relief pull rod (6) is inserted in the guide component; A relief valve pad bracket (2) is provided in the relief valve housing (1), a relief valve port pad (3) is provided in the relief valve pad bracket (2), a relief diaphragm (7) is provided on the surface of the relief valve housing (1), and openings are provided on the surfaces of the relief diaphragm (7), the relief valve pad bracket (2) and the relief valve port pad (3), one end of the relief rod (6) passes through the multiple openings and is fixed to the relief valve port (4) by a fixing component, and the surface of the relief rod (6) is in contact with the surface of the relief valve port pad (3).

2. A relief valve port and pull rod structure according to claim 1, characterized in that: The fixing component comprises a locking nut (8), one end surface of the release rod (6) is provided with a thread, the locking nut (8) is threadedly mounted on the release rod (6), and its surface abuts against the surface of the release diaphragm (7).

3. A relief valve port and pull rod structure according to claim 1, characterized in that: A plurality of sealing pads (9) are fixedly mounted on the surface of the relief valve port (4), and the plurality of sealing pads (9) are arranged in a circular shape.

4. A relief valve port and pull rod structure according to claim 1, characterized in that: The relief valve port (4) and the relief valve housing (1) are both made of stainless steel.

5. The relief valve port and pull rod structure according to claim 1, characterized in that: The guide component is a guide sleeve (5) fixedly installed in the relief valve port (4), and the relief pull rod (6) is slidably inserted in the guide sleeve (5).

6. A relief valve port and pull rod structure according to claim 5, characterized in that: The material of the guide sleeve (5) is polytetrafluoroethylene.

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