Integral wrapping type sealing structure of pressure regulator

Abstract

The utility model relates to the technical field of pressure regulators, and particularly discloses an integral wrapping type sealing structure of a pressure regulator, which comprises a valve body and an air cavity, the air cavity comprises a high-pressure air cavity and a low-pressure air cavity; the high-pressure air cavity is communicated with the low-pressure air cavity; a pressure sensor is arranged in the low-pressure air cavity, a pressure sensing air cavity is formed in the bottom of the pressure sensor, and the pressure sensing air cavity is communicated with an outlet pipe arranged in the low-pressure air cavity; a valve core is also arranged at the valve port; the valve element comprises a valve clack body and a first valve rod arranged in the valve clack body. The first valve rod is provided with a first spring covered by the valve clack body; the valve port is connected to the valve body through threads, and the valve port and the valve body are provided with O-shaped rings for sealing. A sealing gasket is arranged in the valve clack body; a sealing gasket pressing block is arranged on an inner hole of the sealing gasket; a closed space is formed in the sealing gasket, the valve clack body and the sealing gasket pressing block, and high-pressure gas in the pressure regulator is prevented from entering the closed space. And the long-term stability and safety of the sealing system are ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to pressure regulator technical field especially relates to pressure regulator whole package formula sealing structure. BACKGROUND

[0002] The gas pressure regulator is a kind of equipment specially designed for gas transmission and distribution system, its main function is to carry out pressure regulating and pressure stabilizing, to ensure that gas can be kept in a relatively stable low pressure state in the process of conveying. This kind of equipment has been widely used in gas transmission and distribution engineering, and its core function is to adjust the pressure of gas outlet, so that it is stabilized in a specific pressure range, to meet the specific needs of users for gas pressure. However, in the actual application process, the sealing part of gas pressure regulator usually adopts rubber sealing element. These rubber sealing elements need to bear the impact of high-pressure natural gas during work, and reduce high-pressure natural gas to low pressure state through throttling effect. However, if the structure design of rubber sealing element is unreasonable, it may cause the rubber element to be damaged in a short time. This damage not only brings safety hazards, but also may cause frequent replacement of sealing element, thereby increasing maintenance cost and resource waste. Therefore, when designing and manufacturing gas pressure regulator, the structural rationality of rubber sealing element must be fully considered to ensure the safe and stable operation of the equipment and economic benefits.

[0003] In the patent "a pressure regulator with sealing gasket" (announcement number CN217898853U, hereinafter referred to as prior art 1) discloses a sealing structure of pressure regulator, and the sealing gasket is made of hydrogenated nitrile rubber, and is made of steel material, and is made by high temperature quenching and tempering and high temperature tempering compound process. The sealing gasket and metal framework are treated by high temperature and high pressure vulcanization, and are bonded by adhesive, to achieve a more firm effect. This design can improve the sealing performance of pressure regulator, and solve the problems of existing technology, such as easy compression permanent deformation of sealing material, low strength, toughness and plasticity.

[0004] Although the sealing element adopted in prior art 1 has successfully solved the problems of easy compression permanent deformation of sealing material, insufficient strength, poor toughness and low plasticity. However, in the configuration process of sealing material, only the local sealing of pressure regulator working parts can be realized, and the overall sealing effect cannot be realized. Therefore, even with these improvements, gas may still damage the sealing material, thereby affecting its performance and service life. UTILITY MODEL CONTENTS

[0005] Therefore, the utility model embodiment provides a pressure regulator whole package formula sealing structure, to solve the problems that the sealing structure of pressure regulator in prior art is easy to cause the service life of rubber element to be short, cause safety hazards and waste of replacement.

[0006] The utility model discloses an overall wrapping type sealing structure of pressure regulator, including the valve body one in the air cavity of valve body, the air cavity includes high pressure air cavity and low pressure air cavity, high pressure air cavity and low pressure air cavity are communicated through valve port, the bottom of valve body is equipped with the pressure sensing air cavity, and the diaphragm is equipped in pressure sensing air cavity, pressure sensing air cavity is connected with the outlet pipe of low pressure air cavity setting, still be equipped with the valve core in valve port, the valve core includes valve flap body and the first valve rod of valve flap body, and is equipped with the first spring of valve flap body cover setting on the first valve rod, valve port is connected on valve body through screw thread, and valve port and valve body are equipped with " O " ring seal, the sealing washer is equipped in valve flap body, and the sealing washer pressure block is equipped on the inner hole of sealing washer, and the closed space is formed in sealing washer, valve flap body and sealing washer pressure block, prevents the high pressure gas in pressure regulator from entering into the closed space.

[0007] Preferably, the sealing washer and valve flap body contact end face are provided with a semicircular sealing ring; the valve flap body is provided with a sealing groove, and the sealing washer is clamped in the sealing groove of the valve flap body, so that the high pressure gas in the pressure regulator is prevented from entering the gap between the sealing washer and the valve flap body.

[0008] Preferably, the first valve rod connects the sealing washer pressure block and the valve flap body together; the sealing washer and the sealing washer pressure block are pressed together by a nut.

[0009] Preferably, the sealing washer pressure block and the valve flap body are sealed by an "O" ring, so that the high pressure gas in the pressure regulator is prevented from entering the gap between the sealing washer and the sealing washer pressure block.

[0010] Preferably, the high pressure air cavity and the low pressure air cavity are respectively provided with an air inlet and an air outlet communicated with the high pressure air cavity and the low pressure air cavity; the air inlet and the air outlet are respectively provided with an inlet pipe and an outlet pipe connected by bolts.

[0011] Preferably, the inlet pipe is used for introducing high pressure gas, and the outlet pipe is used for leading out low pressure gas.

[0012] Preferably, the pressure regulator is further provided with a cut-off assembly; the cut-off assembly is arranged on the machine body of the pressure regulator; the cut-off assembly further includes a cut-off valve body, and the cut-off valve body is arranged in the air cavity and can block the valve port.

[0013] Preferably, the cut-off valve body is provided with a valve cavity; the valve cavity is provided with a second valve rod and a cut-off piece; the cut-off piece can move in the valve cavity.

[0014] Preferably, the cutting member is arranged in steps, and a second spring and a third spring are arranged at the top and inner part of the cutting member respectively, and the second spring and the third spring are compressed in the valve cavity; the second valve rod is fixedly connected with the cutting member.

[0015] Preferably, the shape of the end of the cutting member is matched with the valve port, and when the second spring and the third spring are released, the cutting member drives to block the valve port.

[0016] The whole-wrapping type sealing structure of the pressure regulator has the following beneficial effects:

[0017] The gap between the sealing gasket and the valve body is blocked, so that the sealing gasket is protected and is not directly impacted by high-pressure gas, thereby avoiding damage of the gas to the sealing gasket, and especially preventing impact and breakdown of the vulcanized rubber in the sealing gasket. The closed space formed in the sealing gasket, the valve body and the sealing gasket pressing block prevents high-pressure gas from entering the space between the sealing gasket and the sealing gasket pressing block. In this way, the metal part on the sealing gasket is prevented from being in contact with the vulcanized rubber, the impact force of the gas is reduced, and the rubber part is protected from being damaged. Especially in a high-pressure environment, if the rubber sealing element is not effectively protected, it may be damaged due to the impact of high-pressure gas. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly introduced as follows. For those skilled in the art, other drawings can also be obtained without creative labor on the premise that these drawings are within the protection scope of the present application.

[0019] Figure 1 is a cross-sectional view of the whole-wrapping type sealing structure of the pressure regulator;

[0020] Figure 2 is a local structure view of the whole-wrapping type sealing structure of the pressure regulator;

[0021] Figure 3 is another local structure view of the whole-wrapping type sealing structure of the pressure regulator;

[0022] Parts and components in the drawings:

[0023] 100-pressure regulator;

[0024] 110-valve body;

[0025] 121-high-pressure gas cavity, 122-low-pressure gas cavity, 123-inlet, 124-outlet, 125-inlet pipe, 126-outlet pipe;

[0026] 131 - valve port, 132 - valve body, 133 - first valve rod, 134 - first spring, 135 - "O" ring, 136 - gasket, 137 - gasket retainer, 138 - seal, 139 - nut

[0027] 140 - pressure sensing air chamber

[0028] 151 - diaphragm, 152 - shut-off valve body, 153 - valve chamber, 154 - second valve rod, 155 - shut-off member, 156 - second spring, 157 - third spring, 158 - pressure sensing tube DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. It should be noted that, in this article, relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. In the description of the utility model, it should be understood that the orientation or position relationship indicated by terms such as "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitation, the elements defined by the statement "include" do not exclude the presence of other identical elements in the process, method, article or device including the elements. If not conflicting, the embodiments of the utility model and various features in the embodiments can be combined with each other, all within the protection scope of the utility model.

[0030] Embodiment 1

[0031] Please refer to Figure 1The utility model embodiment provides a kind of whole package formula sealing structure of pressure regulator;In actual application process, the sealing of gas pressure regulator 100 is usually realized by relying on rubber seal piece.This sealing mode involves throttling natural gas under high pressure through rubber seal piece, to reduce its pressure to safe low pressure level.However, if the design structure of rubber seal piece is unreasonable, then in short time, these rubber pieces can be damaged rapidly due to the continuous impact and wear of high-pressure natural gas.This damage not only leads to security risk in use process, but also increases the maintenance cost and resource waste of frequent replacement of rubber piece.Therefore, it is particularly important to reasonably design the structure of rubber seal piece, to ensure the long-term stable operation and use safety of gas pressure regulator 100.

[0032] Please see Figure 1 In the embodiment, the pressure regulator 100 includes a valve body 110, and the valve body 110 is internally provided with an air cavity. The air cavity is further divided into two parts, i.e., a high-pressure air cavity 121 and a low-pressure air cavity 122. The two air cavities are communicated with each other through a valve port 131, so as to realize the flow of gas. The entire air cavity constitutes the core structure of the pressure regulator 100, and is mainly responsible for the entry and discharge of gas. Through various components inside the pressure regulator 100, the gas is adjusted between the high-pressure air cavity 121 and the low-pressure air cavity 122, so as to finally ensure that the output gas is the required low-pressure gas. This design not only ensures the stability of the gas pressure, but also improves the reliability and safety of the pressure regulator 100.

[0033] Please see Figure 1 and Figure 3The bottom of the valve body 110 is provided with a pressure sensing air cavity 140, and a diaphragm 151 is arranged in the pressure sensing air cavity 140, which is used to sense the pressure change in the pressure sensing air cavity 140. The pressure sensing air cavity 140 is communicated with the outlet pipe 126 of the low pressure air cavity 122, and the pressure sensing air cavity 140 is communicated with the outlet pipe 126 through a pressure sensing pipe 158, so that the pressure signal can be transmitted. A valve core is arranged at the valve port 131, which comprises a valve flap body 132 and a first valve rod 133 arranged in the valve flap body 132. A first spring 134 is arranged on the first valve rod 133 and covered by the valve flap body 132, so as to provide necessary restoring force. The valve port 131 is threadedly connected to the valve body 110, and the valve port 131 and the valve body 110 are sealed by an "O" ring 135. A sealing gasket 136 is arranged in the valve flap body 132. A sealing gasket pressing block 137 is arranged on the inner hole of the sealing gasket 136. A closed space is formed in the sealing gasket 136, the valve flap body 132 and the sealing gasket pressing block 137, so as to prevent high pressure gas in the pressure regulator 100 from entering the closed space. The pressure of the outlet pipe 126 is fed back to the pressure sensing air cavity 140, and the diaphragm 151 is pressed by the gas pressure, so as to drive the first valve rod 133 and push the valve flap body 132 to adjust the opening size of the valve port 131. During the adjustment process, the gas may enter the gap in the valve flap body 132, which erodes the parts and shortens the service life of the sealing member arranged on the valve flap body 132. In this embodiment, the sealing gasket 136, the sealing ring 138 and the "O" ring 135 are wrapped around the valve flap body 132, so that the gas cannot enter the gap in the valve flap body 132, and the service life of the valve flap body 132 and the sealing member is increased. The closed space is formed in the sealing gasket 136, the valve flap body 132 and the sealing gasket pressing block 137, so as to prevent the high pressure gas in the pressure regulator 100 from entering the closed space, effectively solve the problem that the high pressure gas breaks the metal member and the vulcanized rubber on the sealing gasket 136, and ensure the stability and reliability of the entire pressure regulating system.

[0034] Please refer to Figure 3In this embodiment, the sealing gasket 136 is provided with a semicircular sealing ring 138 on the contact end surface of the valve disc 132. Such a setting can ensure good sealing effect between the sealing gasket 136 and the valve disc 132. In addition, the surface of the valve disc 132 is specially processed with a sealing groove matching the semicircular sealing ring 138. The sealing gasket 136 is clamped into the sealing groove of the valve disc 132 through the semicircular sealing ring 138, thereby realizing the sealing of high-pressure gas. This structural arrangement effectively isolates the high-pressure gas inside the pressure regulator 100, preventing it from entering the small gap between the sealing gasket 136 and the valve disc 132, ensuring the sealing performance and safety of the entire system. Through this unique design, high-pressure gas leakage can be effectively avoided, ensuring the stable and reliable operation of the pressure regulator 100 in a high-pressure environment.

[0035] Please refer to Figure 1 In this embodiment, the first valve rod 133 serves to tightly connect the sealing gasket block 137 and the valve disc 132 together, thereby ensuring that the valve disc 132 can be effectively moved synchronously when the first valve rod 133 is moved. This synchronous movement allows the operator to accurately adjust the opening degree of the valve port 131 to meet different gas control requirements. In addition, in order to ensure that the connection between the sealing gasket 136 and the sealing gasket block 137 is more firm and reliable, the two are fixed by pressing the nut 139. This design not only improves the overall sealing performance of the valve, but also enhances the stability and durability of the valve during long-term use.

[0036] Please refer to Figure 3 In this embodiment, the sealing gasket block 137 and the valve disc 132 use an "O" ring 135 as a sealing element. The purpose of this setting is to ensure that the high-pressure gas inside the pressure regulator 100 cannot penetrate into the gap between the sealing gasket 136 and the sealing gasket block 137 through any possible path. Through this "O" ring 135 sealing method, high-pressure gas can be effectively isolated to prevent it from entering the gap, thereby ensuring the sealing performance and safe operation of the entire pressure regulating system. This sealing structure is not only simple and reliable, but also easy to install and maintain, greatly improving the efficiency and service life of the pressure regulator 100.

[0037] Please refer to Figure 1In this embodiment, the high-pressure gas cavity 121 and the low-pressure gas cavity 122 are both equipped with gas inlets 123 and gas outlets 124 that communicate with them. These gas inlets 123 and gas outlets 124 are installed with inlet pipes 125 and outlet pipes 126 respectively through bolted connections. The main function of these pipes is to introduce and discharge gas. Through such a design, it can ensure the smooth flow of gas between the high-pressure gas cavity 121 and the low-pressure gas cavity 122, while maintaining the pressure difference between the two cavities, which is crucial for the normal operation of the entire system.

[0038] The main function of the inlet pipe 125 is to introduce high-pressure gas, which introduces high-pressure gas from the external environment into the high-pressure gas cavity 121. The outlet pipe 126 is responsible for discharging low-pressure gas from the low-pressure gas cavity 122. These low-pressure gases are usually processed by the system and may have completed certain specific functions or reached the desired conditions. Through such a gas flow path, efficient use of gas and stable operation of the system can be achieved.

[0039] Embodiment 2

[0040] See Figure 1 and Figure 2 Figure 2 The utility model provides a kind of overall wrapping type sealing structure of pressure regulator. In this embodiment, a kind of cut-off assembly of pressure regulator is provided, and the design purpose of this assembly is to enable immediate use in the case where the gas pressure of pressure regulator 100 cannot be effectively regulated by valve body 132, so as to realize the rapid cut-off of the communication state between high-pressure gas cavity 121 and low-pressure gas cavity 122. The introduction of this cut-off assembly ensures that the two cavities can be quickly isolated when the pressure regulator 100 fails or abnormally, preventing high-pressure gas from causing potential danger to the low-pressure area.

[0041] To achieve the above function, a cut-off assembly is added to the pressure regulator 100; the cut-off assembly is installed on the body of the pressure regulator 100 to ensure its stability and reliability. The core part of the cut-off assembly is the cut-off valve body 152, which is cleverly placed inside the gas cavity and has the ability to effectively block the valve port 131, so as to immediately cut off the passage between the two cavities when necessary.

[0042] In the structural design of the cut-off assembly, a valve cavity 153 is provided to make the internal structure of the cut-off assembly more efficient. Inside the valve cavity 153, a second valve rod 154 and a cut-off piece 155 are provided, which can move freely within the valve cavity 153 to achieve their functions. The cut-off piece 155 can move within the valve cavity 153 as needed to achieve the desired plugging effect.

[0043] In order to further improve the performance of the cutting member 155, the valve cavity 153 adopts a stepped structure design, so that the cutting member 155 is equipped with a second spring 156 and a third spring 157 at the top and inside respectively. The two springs are compressed inside the valve cavity 153, providing the necessary restoring force for the cutting member 155. The second valve rod 154 is combined with the cutting member 155 by fixed connection, ensuring their synchronization during operation.

[0044] At the end of the cutting member 155, a structure is provided that matches the shape of the valve port 131, so that when the second spring 156 and the third spring 157 are released, they can drive the cutting member 155 to move quickly into position, thereby achieving airtight sealing of the valve port 131. This design ensures that in an emergency, the cutting member 155 can respond quickly, effectively isolating the high-pressure gas cavity 121 and the low-pressure gas cavity 122, ensuring the safe operation of the entire system.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for part or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solution to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A voltage regulator integrally wrapped sealing structure, characterized in that: The valve body (110) comprises an air cavity provided in the valve body (110); the air cavity comprises a high-pressure air cavity (121) and a low-pressure air cavity (122); the high-pressure air cavity (121) and the low-pressure air cavity (122) are connected via a valve port (131); A pressure-sensitive air cavity (140) is provided at the bottom of the valve body (110), and a diaphragm (151) is provided in the pressure-sensitive air cavity (140); the pressure-sensitive air cavity (140) is communicated with an outlet pipe (126) provided in the low-pressure air cavity (122); a valve core is also provided at the valve port (131); the valve core includes a valve flap body (132) and a first valve stem (133) provided in the valve flap body (132); a first spring (134) is provided on the first valve stem (133) and is covered by the valve flap body (132); The valve port (131) is connected to the valve body (110) by a thread, and an O-ring (135) is provided between the valve port (131) and the valve body (110) for sealing; a sealing gasket (136) is provided in the valve flap body (132); a sealing gasket pressing block (137) is provided on the inner hole of the sealing gasket (136); a closed space is formed within the sealing gasket (136), the valve flap body (132) and the sealing gasket pressing block (137), so as to prevent the high-pressure gas in the pressure regulator (100) from entering the closed space.

2. The integrally wrapped sealing structure of the voltage regulator according to claim 1, characterized in that: A semicircular sealing ring (138) is provided on the contact end surface of the sealing gasket (136) and the valve flap body (132); a sealing groove is provided on the valve flap body (132), and the sealing gasket (136) clamps the sealing ring (138) in the sealing groove of the valve flap body (132), thereby preventing the high-pressure gas in the pressure regulator (100) from entering the gap between the sealing gasket (136) and the valve flap body (132).

3. The integrally wrapped sealing structure of the voltage regulator according to claim 1, characterized in that: The first valve stem (133) connects the sealing gasket pressing block (137) and the valve flap body (132) together; the sealing gasket (136) and the sealing gasket pressing block (137) are compressed by a nut (139).

4. The integrally wrapped sealing structure of the voltage regulator according to claim 3, characterized in that: An O-ring (135) is used to seal between the sealing gasket pressing block (137) and the valve flap body (132), thereby preventing high-pressure gas in the pressure regulator (100) from entering the gap between the sealing gasket (136) and the sealing gasket pressing block (137).

5. The integrally wrapped sealing structure of the voltage regulator according to claim 4, characterized in that: The high-pressure air cavity (121) and the low-pressure air cavity (122) are respectively provided with an air inlet (123) and an air outlet (124) communicating with the high-pressure air cavity (121) and the low-pressure air cavity (122); the air inlet (123) and the air outlet (124) are respectively provided with an inlet pipe (125) and an outlet pipe (126) connected by bolts.

6. The integrally wrapped sealing structure of the voltage regulator according to claim 5, characterized in that: The inlet pipe (125) is used to introduce high-pressure gas, and the outlet pipe (126) is used to lead out low-pressure gas.

7. The integrally wrapped sealing structure of the voltage regulator according to claim 1, characterized in that: The pressure regulator (100) is also provided with a cut-off assembly; the cut-off assembly is arranged on the body of the pressure regulator (100); the cut-off assembly also includes a cut-off valve body (152); the cut-off valve body (152) is arranged in the air cavity and can seal the valve port (131).

8. The integrally wrapped sealing structure of the voltage regulator according to claim 7, characterized in that: A valve cavity (153) is provided in the cut-off valve body (152); a second valve stem (154) and a cut-off member (155) are provided in the valve cavity (153); and the cut-off member (155) is movable in the valve cavity (153).

9. The integrally wrapped sealing structure of the voltage regulator according to claim 8, characterized in that: The cut-off piece (155) is arranged in a stepped manner, and a second spring (156) and a third spring (157) are respectively provided at the top and inside of the cut-off piece (155), and the second spring (156) and the third spring (157) are compressed in the valve cavity (153); the second valve stem (154) is fixedly connected to the cut-off piece (155).

10. The integrally wrapped sealing structure of the voltage regulator according to claim 9, characterized in that: The shape of the end of the cutting piece (155) matches the valve port (131), and when the second spring (156) and the third spring (157) are released, the cutting piece (155) is driven to block the valve port (131).

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