Leather film type pressure gas-liquid conversion device for emergency cut-off valve
By designing a membrane-type pressure gas-liquid conversion device in a wellhead self-operated emergency shutoff valve, the combination of hydraulic oil and membrane is used to solve the problem of pressure sensor failure due to water freezing in extreme weather, ensuring the safety of equipment and pipelines.
Patent Information
- Application Number
- CN202421578096.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-05
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-07-05
AI Technical Summary
The existing wellhead self-operated emergency shutoff valve is prone to failure due to water filling and freezing in the pressure sensor, resulting in the loss of protection function for downstream equipment and pipelines.
A membrane-type pressure gas-liquid conversion device is designed to avoid the problem of water freezing through the intervention of hydraulic oil and the deformation of the membrane, ensuring that the pressure sensor works normally in extremely low temperature environments.
It effectively avoids the failure of the pressure sensor due to water freezing, ensures the control function of the wellhead emergency shutdown valve, and ensures the safety of downstream equipment and pipelines.
Smart Images
Figure CN222760353U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of natural gas pipelines, in particular to a membrane type pressure gas-liquid conversion device for a wellhead emergency cut-off valve. Background Art
[0002] Emergency shut-off valves are highly reliable and safe shut-off valves widely used in gas transmission and distribution systems, gas pipeline networks, and industrial gas pressure regulating systems. Wellhead self-operated emergency shut-off valves are one type of emergency shut-off valves. They detect pressure changes in the pipeline through pressure sensors, and then control the wellhead self-operated emergency shut-off valves in real time through the system, effectively controlling the supply of natural gas and thus preventing the occurrence of serious accidents in a timely manner. Wellhead self-operated emergency shut-off valves are usually installed outdoors, and their working environment is relatively harsh, often subject to extreme weather such as severe cold and heat. The natural gas flowing through the wellhead self-operated emergency shut-off valve contains water and sand. The water and sand in the natural gas will flow to the pressure sensor through the stainless steel pressure pipe. Especially in severe cold weather, the water in the pressure sensor will freeze, causing the failure of the pressure sensor, which will lead to the loss of control of the wellhead self-operated emergency shut-off valve and the loss of the function of protecting downstream equipment and pipelines. Utility Model Content
[0003] In order to make up for the deficiencies of the prior art, the utility model provides a diaphragm type pressure gas-liquid conversion device for a wellhead emergency shut-off valve, which has a reasonable structural design and is easy to install, and can effectively avoid the failure of the pressure sensor due to ice formed in the pressure sensor, thereby ensuring that the pressure sensor can still work normally under extremely low temperature environmental conditions, thereby not losing control of the emergency shut-off valve, ensuring the safety of downstream equipment and pipelines, and solving the problems existing in the prior art.
[0004] The technical solution adopted by the utility model to solve the above technical problems is:
[0005] A diaphragm pressure gas-liquid conversion device for an emergency shut-off valve comprises a base and a positioning boss arranged in the center of the base surface, a lower groove is arranged in the center of the positioning boss surface, an air inlet through-hole penetrating the base is vertically arranged in the lower groove, and a natural gas interface arranged below the base is connected to the air inlet through-hole; a holder is arranged above the base, a clamping boss is arranged at the bottom of the holder corresponding to the outer position of the positioning boss, a plurality of locking bolts are arranged along the circumferential direction of the holder surface corresponding to the position of the clamping boss, the bottom of the locking bolt passes through the holder and the clamping boss in turn and is connected to the base, an upper groove is arranged in the center of the bottom of the holder corresponding to the position of the lower groove, a liquid outlet through-hole penetrating the holder is vertically arranged in the upper groove, a hydraulic oil interface arranged above the holder is connected to the liquid outlet through-hole, a diaphragm is arranged at the bottom of the holder inside the clamping boss, the bottom of the diaphragm abuts against the positioning boss of the base, a liquid inlet through-hole connected to the upper groove is arranged on one side of the holder, and a hydraulic quick connector arranged on the outer side of the holder is connected to the liquid inlet through-hole.
[0006] Optionally, a diaphragm bolt is provided in the lower groove, the screw of the diaphragm bolt passes upward through the center of the diaphragm and is connected to a thin nut provided in the upper groove, and a diaphragm disk is provided between the thin nut and the diaphragm and is sleeved on the screw of the diaphragm bolt.
[0007] Optionally, an inner upper annular groove is provided along the circumferential direction of the bottom of the diaphragm disk, and an inner lower annular groove is provided along the circumferential direction of the diaphragm bolt at a position corresponding to the bottom of the diaphragm.
[0008] Optionally, an outer upper ring groove is provided along the circumferential direction of the bottom of the clamping seat corresponding to the clamping membrane position, and an outer lower ring groove is provided along the circumferential direction of the positioning boss surface corresponding to the clamping membrane position.
[0009] The utility model adopts the above technical solution, and has the advantages of reasonable structural design, easy installation, and effective avoidance of failure of the pressure sensor due to freezing of water in the pressure sensor, ensuring that the pressure sensor can still work normally under extremely low temperature environmental conditions, thereby not losing control of the emergency shut-off valve, and ensuring the safety of downstream equipment and pipelines. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;
[0011] Figure 2 for Figure 1 A schematic diagram of a top view structure;
[0012] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure in the middle AA direction;
[0013] Figure 4 is a schematic diagram of the three-dimensional structure of the base;
[0014] Figure 5 It is a schematic diagram of the three-dimensional structure of the card seat;
[0015] Figure 6 It is a three-dimensional structural schematic diagram of the membrane, membrane bolts, and membrane disk;
[0016] In the figure, 1, base; 2, positioning boss; 3, lower groove; 4, air inlet hole; 5, natural gas interface; 6, socket; 7, clamping boss; 8, locking bolt; 9, upper groove; 10, liquid outlet hole; 11, hydraulic oil interface; 12, diaphragm; 13, liquid inlet hole; 14, hydraulic quick connector; 15, diaphragm bolt; 16, thin nut; 17, diaphragm disk; 18, inner upper ring groove; 19, inner lower ring groove; 20, outer upper ring groove; 21, outer lower ring groove. DETAILED DESCRIPTION
[0017] In order to clearly illustrate the technical features of the present solution, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings. In the following description, many specific details are described to facilitate a full understanding of the present application. However, the present application can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below.
[0018] In addition, in the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.
[0019] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, they can be fixedly connected, detachably connected, or integrated. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" and the like mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.
[0020] like Figure 1-6 As shown, in this embodiment, a membrane type pressure gas-liquid conversion device for an emergency shut-off valve includes a base 1 and a positioning boss 2 arranged in the center of the surface of the base 1, a lower groove 3 is arranged in the center of the surface of the positioning boss 2, an air intake hole 4 penetrating the base is vertically arranged in the lower groove 3, and a natural gas interface 5 arranged below the base 1 is connected to the air intake hole; a clamping seat 6 is arranged above the base 1, a clamping boss 7 is arranged at the bottom of the clamping seat 6 at a position corresponding to the outer side of the positioning boss 2, and a plurality of locking bolts 8 are respectively arranged on the surface of the clamping seat 6 at the position corresponding to the clamping boss 7 along its circumferential direction, and the locking bolts 8 The bottom of the card seat 6 passes through the card seat 6 and the card connection boss 7 in sequence and is connected to the base 1. An upper groove 9 is provided in the center of the bottom of the card seat 6 corresponding to the position of the lower groove 3. A liquid outlet hole 10 that passes through the card seat 6 is vertically provided in the upper groove 9. A hydraulic oil interface 11 arranged above the card seat 6 is connected to the liquid outlet hole 10. A membrane 12 is provided at the bottom of the card seat 6 on the inner side of the card connection boss 7. The bottom of the membrane 12 abuts against the positioning boss 2 of the base 1. A liquid inlet hole 13 connected to the upper groove 9 is provided on one side of the card seat 6. A hydraulic quick connector 14 arranged on the outside of the card seat 6 is connected to the liquid inlet hole 13.
[0021] Optionally, a membrane bolt 15 is provided in the lower groove 3, and the screw of the membrane bolt 15 passes upward through the center of the membrane 12 and is connected to the thin nut 16 provided in the upper groove 9, and a membrane plate 17 sleeved on the screw of the membrane bolt 15 is provided between the thin nut 16 and the membrane 12. After the membrane bolt 15 penetrates the membrane 12, the membrane plate 17 and the membrane bolt 15 clamp the membrane 12 by twisting the thin nut 16. On the one hand, when the pressure difference is too large, the membrane 12 is not torn by increasing the deformation of the membrane 12; on the other hand, it can prevent the sand contained in the natural gas from directly impacting the membrane, play a certain defensive role, and thus extend the service life of the membrane.
[0022] Optionally, an inner upper annular groove 18 is provided along the circumferential direction of the bottom of the diaphragm plate 17, and an inner lower annular groove 19 is provided along the circumferential direction of the diaphragm bolt 15 at the bottom position of the diaphragm 12. The functions of the inner upper annular groove 18 and the inner lower annular groove 19 are, firstly, to increase the friction between the diaphragm 12, so that the diaphragm bolt 15 and the diaphragm plate 17 clamp the diaphragm more firmly; secondly, to increase the sealing performance, prevent the penetration of natural gas or low-temperature hydraulic oil, and ensure the normal use of the device.
[0023] Optionally, an outer upper ring groove 20 is provided along its circumferential direction at the bottom of the holder 6 corresponding to the position of the clamping membrane 12, and an outer lower ring groove 21 is provided along its circumferential direction on the surface of the positioning boss 2 corresponding to the position of the clamping membrane 12. The functions of the outer upper ring groove 20 and the outer lower ring groove 21 are, firstly, to increase the friction between the membrane 12, so that the base 1 and the holder 6 clamp the membrane more firmly; secondly, to increase the sealing performance, prevent the natural gas or low-temperature hydraulic oil from leaking out, and ensure the normal use of the device.
[0024] Before using the device, it is necessary to use a pressure pipe to connect the pressure sensor and the hydraulic oil interface 11, and the pressure sensor is set above the device, and then the pressure pipe drawn from the gas supply pipeline is connected to the natural gas interface 5. Finally, the low-temperature hydraulic oil is injected into the upper groove 9 of the base 6 through the hydraulic quick connector 14, and the low-temperature hydraulic oil is filled in the pressure pipe and the pressure sensor. When exposed to severe cold weather, the low-temperature hydraulic oil will not condense, thereby ensuring the normal operation of the pressure sensor. When in use, when the pressure in the pressure pipe becomes larger, the gas will be filled into the lower groove 3 through the air inlet hole 4, and as the gas is continuously filled, the membrane 12 will deform and arch upward. With the deformation of the membrane 12, the low-temperature hydraulic oil filled in the upper groove 9 is squeezed into the pressure sensor, and a one-way valve is provided in the hydraulic quick connector 14, which effectively blocks the low-temperature hydraulic oil in the upper groove 9 from being squeezed out through the hydraulic oil structure 11. After the pressure sensor senses the pressure, it transmits the signal to the control device, thereby closing the wellhead self-powered emergency shut-off valve. It has a reasonable structural design and is easy to install. It can effectively avoid the failure of the pressure sensor due to water freezing in the pressure sensor, ensure that the pressure sensor can still work normally under extremely low temperature conditions, thereby not losing control of the emergency shut-off valve, ensuring the safety of downstream equipment and pipelines, and solving the problems existing in the prior art.
[0025] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention. For those skilled in the art, any replacement improvements or changes made to the implementation methods of the present invention are within the protection scope of the present invention.
[0026] The matters not described in detail in the present invention are all known technologies to those skilled in the art.
Claims
1. A membrane type pressure gas-liquid conversion device for an emergency shut-off valve, characterized in that: The cam is provided with a plurality of locking bolts at the bottom of the base and a plurality of locking bolts at the bottom of the base, and the locking bolts are provided with a plurality of locking bolts at the bottom of the base and a plurality of locking bolts at the bottom of the base. The locking bolts are provided with a plurality of locking bolts at the bottom of the base and a plurality of locking bolts at the bottom of the base. The locking bolts are provided with a plurality of locking bolts at the bottom of the base and a plurality of locking bolts at the bottom of the base. The locking bolts are provided with a plurality of locking bolts at the bottom of the base and a plurality of locking bolts at the bottom of the base. The locking bolts are provided with a plurality of locking bolts at the bottom of the base and a plurality of locking bolts at the bottom of the base. The locking bolts are provided with a plurality of locking bolts at the bottom of the base and a plurality of locking bolts at the bottom of the base. The locking bolts are provided with a plurality of locking bolts at the bottom of the base and a plurality of locking bolts at the bottom of the base. The locking bolts are provided with a plurality of locking bolts at the bottom of the base and a plurality of locking bolts at the bottom of the base. The locking bolts are provided with a plurality of locking bolts at the bottom of the base and a plurality of locking bolts at the bottom of the base. The locking bolts are provided with a plurality of locking bolts at the bottom of the base and a plurality of locking bolts at the bottom of the base.
2. The membrane type pressure gas-liquid conversion device for an emergency shut-off valve according to claim 1, characterized in that: A membrane bolt is arranged in the lower groove, and a screw rod of the membrane bolt passes upward through the center of the membrane and is connected with a thin nut arranged in the upper groove. A membrane disk sleeved on the screw rod of the membrane bolt is arranged between the thin nut and the membrane.
3. The membrane type pressure gas-liquid conversion device for an emergency shut-off valve according to claim 2, characterized in that: An inner upper ring groove is arranged along the circumferential direction at the bottom of the diaphragm disc, and an inner lower ring groove is arranged along the circumferential direction on the diaphragm bolt at the position corresponding to the bottom of the diaphragm.
4. A membrane type pressure gas-liquid conversion device for an emergency shut-off valve according to claim 1 or 2, characterized in that: An outer upper ring groove is arranged on the bottom of the clamping seat corresponding to the clamping membrane position along its circumferential direction, and an outer lower ring groove is arranged on the surface of the positioning boss corresponding to the clamping membrane position along its circumferential direction.