High-pressure gate valve

Abstract

The high-pressure gate valve comprises a gate valve body and a pressure release valve, the gate valve body comprises a first valve body and a first valve element, a first valve cavity, a first inflow channel and a first outflow channel are formed in the first valve body, the first inflow channel and the first outflow channel communicate with the first valve cavity, and the first valve element is movably arranged in the first valve cavity; the first valve element is connected with the first valve element so as to be switched between a first communication position and a first disconnection position, in the first communication position, the first inflow channel is communicated with the first outflow channel, and in the first disconnection position, the first valve element blocks the first inflow channel and / or the first outflow channel; the pressure release valve is fixed to the first valve body, and a flow inlet of the pressure release valve communicates with the first valve cavity. According to the high-pressure gate valve, through the pressure release valve communicated with the first valve cavity, when the pressure of fluid in the first valve cavity rises and the first valve element of the high-pressure gate valve is difficult to move, pressure in the first valve cavity can be reduced by controlling opening of the pressure release valve, and therefore the first valve element can move more easily.

Description

Technical Field

[0001] The present disclosure relates to the technical field of valves, and more particularly, to a high-pressure gate valve. Background Art

[0002] In power industries such as thermal power plants and nuclear power plants, the high-temperature and high-pressure feed water system pipelines have high pressure and large flow rate, and high-pressure gate valves are mostly used to achieve the switching function. However, the high-pressure gate valves often suffer from valve jamming and sticking, making it difficult to open. Summary of the Utility Model

[0003] The purpose of the present disclosure is to provide a high-pressure gate valve that can solve the technical problem that the existing high-pressure gate valves are difficult to open.

[0004] To achieve the above purpose, the present disclosure provides a high-pressure gate valve, including a gate valve body and a pressure relief valve. The gate valve body includes a first valve body and a first valve core. A first valve cavity, a first inlet flow channel and a first outlet flow channel communicating with the first valve cavity are provided in the first valve body. The first valve core is movably arranged in the first valve cavity to switch between a first connected position and a first disconnected position. In the first connected position, the first inlet flow channel communicates with the first outlet flow channel. In the first disconnected position, the first valve core blocks the first inlet flow channel and / or the first outlet flow channel. The pressure relief valve is fixed on the first valve body, and the inlet of the pressure relief valve communicates with the first valve cavity.

[0005] Optionally, the pressure relief valve includes a second valve body, a second valve core and an elastic member. A second valve cavity, a second inlet flow channel and a second outlet flow channel communicating with the second valve cavity are provided in the second valve body. One end of the second inlet flow channel forms the inlet. The second valve core is movably arranged in the second valve cavity to switch between a second connected position and a second disconnected position. In the second connected position, the second inlet flow channel and the second outlet flow channel communicate through the second valve cavity. In the second disconnected position, the second valve core blocks the other end of the first inlet flow channel. The elastic member is configured to drive the second valve core to move towards the second disconnected position.

[0006] Optionally, the second valve body includes a first valve portion and a second valve portion. A connection hole is provided at one end of the first valve portion. One end of the second valve portion is detachably and sealingly connected to the connection hole. The connection hole and the second valve portion enclose the second valve cavity. The other end of the second valve portion is fixed to the first valve body. Both the second inlet flow channel and the second outlet flow channel are provided in the second valve portion and penetrate through one end of the second valve portion located in the connection hole.

[0007] Optionally, an elastic sealing block is provided at one end of the second valve core facing the second inlet flow channel, and the elastic sealing block is used to seal one end of the second inlet flow channel communicating with the second valve cavity.

[0008] Optionally, a baffle is provided on the outer wall of the second valve core, one end of the elastic member is connected to the baffle, and the other end is connected to the bottom of the connection hole.

[0009] Optionally, the outer wall of the baffle is slidably and sealingly connected to the wall of the second valve cavity.

[0010] Optionally, the connection hole includes a first hole section, a second hole section, and a third hole section connected in sequence from the bottom of the hole to the orifice. The aperture of the third hole section is larger than that of the second hole section, the aperture of the second hole section is larger than that of the first hole section, the second valve part is sealingly connected to the third hole section, and the baffle is slidably sealed in the second hole section.

[0011] Optionally, the elastic member is a spring, and the spring is sleeved outside the second valve core.

[0012] Optionally, a through hole is provided at the bottom of the connection hole, the second valve core passes through the through hole and is sealingly connected to the through hole, and one end of the second valve core away from the second inlet flow channel is located outside the second valve body.

[0013] Optionally, the first valve part is provided with a plurality of threaded holes, and locking members are screwed into the threaded holes, and one end of the locking member abuts against the second valve part.

[0014] Through the above technical solution, when the fluid pressure in the first valve cavity rises and it is difficult for the first valve core of the high-pressure gate valve to move, the opening of the pressure relief valve can be controlled to connect the first valve cavity with the external environment through the pressure relief valve for pressure reduction, so that the high-pressure fluid in the first valve cavity is discharged outside the first valve cavity, the pressure in the first valve cavity is reduced, and then the first valve core is easier to move and the high-pressure gate valve is easier to open. After the high-pressure gate valve is opened, the first inlet flow channel and the first outlet flow channel are connected. At this time, the pressure relief valve can be controlled to close to reduce the leakage of fluid from the pressure relief valve.

[0015] Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation section. Description of the Drawings

[0016] The drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification. Together with the following specific implementation, they are used to explain the present disclosure, but do not constitute a limitation to the present disclosure. In the drawings:

[0017] Figure 1 is a schematic structural diagram of an existing high-pressure gate valve of the present disclosure;

[0018] Figure 2 It is a schematic structural diagram of an improved high-pressure gate valve provided by an exemplary embodiment of the present disclosure;

[0019] Figure 3 is Figure 2 The partial enlarged view at position A in

[0020] Description of the reference numerals

[0021] 100 - Gate valve body; 101 - First valve cavity; 102 - First inlet flow channel; 103 - First outlet flow channel; 110 - First valve body; 120 - First valve core; 130 - Valve seat;

[0022] 200 - Pressure relief valve; 201 - Inlet port; 202 - Second inlet flow channel; 203 - Second outlet flow channel; 210 - Second valve body; 211 - First valve part; 212 - Second valve part; 220 - Second valve core; 230 - Elastic member; 240 - Connection hole; 241 - First hole section; 242 - Second hole section; 243 - Third hole section; 250 - Elastic sealing block; 260 - Baffle; 270 - Locking member. Specific embodiments

[0023] The following will describe the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for the purpose of illustration and explanation of the present disclosure, and are not intended to limit the present disclosure.

[0024] In the description of the present disclosure, it should be understood that the terms "inner" and "outer" refer to the inside and outside of the corresponding structural contour. In addition, the terms "first", "second", etc. are only used to distinguish one element from another, and do not have sequentiality and importance.

[0025] In the description of the present disclosure, it should also be noted that unless otherwise clearly specified and limited, the terms "arranged", "connected", "coupled", "installed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific situations.

[0026] The inventor has found through research that the existing high-pressure gate valves usually have such as Figure 1The inlet flow channel a, the outlet flow channel b, and the valve cavity c shown. The reason why it is difficult to open a high-pressure gate valve is that when the high-pressure gate valve is closed, the inlet flow channel a, the outlet flow channel b, and the valve cavity c are not connected to each other. When the high-temperature and high-pressure fluid upstream enters the inlet flow channel a, the temperature and pressure of the medium in the inlet flow channel a will rise rapidly. Through heat transfer, the temperature of the medium in the valve cavity c will rise rapidly, and then the pressure in the valve cavity c will also rise rapidly, resulting in the valve core in the valve cavity c being unable to move under the action of the pressure after rising, making it difficult to open the high-pressure gate valve.

[0027] In view of this, as Figure 2 and Figure 3 shown, the present disclosure provides a high-pressure gate valve, including a gate valve body 100 and a pressure relief valve 200. The gate valve body 100 includes a first valve body 110 and a first valve core 120. A first valve cavity 101, a first inlet flow channel 102 communicating with the first valve cavity 101, and a first outlet flow channel are provided in the first valve body 110. The first valve core 120 is movably disposed in the first valve cavity 101 to switch between a first communication position and a first disconnection position. In the first communication position, the first inlet flow channel 102 communicates with the first outlet flow channel. In the first disconnection position, the first valve core 120 blocks the first inlet flow channel 102 and / or the first outlet flow channel. The pressure relief valve 200 is fixed on the first valve body 110, and the inlet port 201 of the pressure relief valve 200 communicates with the first valve cavity 101.

[0028] Through the above technical solution, when the fluid pressure in the first valve cavity 101 rises, making it difficult for the first valve core 120 to move and resulting in difficulty in opening the high-pressure gate valve, the pressure relief valve 200 can be controlled to open, so that the first valve cavity 101 communicates with the external environment through the pressure relief valve 200 for pressure reduction, enabling the high-pressure fluid in the first valve cavity 101 to be discharged outside the first valve cavity 101. The pressure in the first valve cavity 101 decreases, and then it is easier for the first valve core 120 to move, and it is easier to open the high-pressure gate valve. After the high-pressure gate valve is opened, the first inlet flow channel 102 and the first outlet flow channel communicate. At this time, the pressure relief valve 200 can be controlled to close to reduce fluid leakage from the pressure relief valve 200.

[0029] As Figure 2 and Figure 3As shown, in some alternative embodiments, the pressure relief valve 200 includes a second valve body 210, a second valve core 220, and an elastic member 230. A second valve chamber, a second inlet flow channel 202 communicating with the second valve chamber, and a second outlet flow channel 203 are provided in the second valve body 210. One end of the second inlet flow channel 202 forms an inlet port 201. The second valve core 220 is movably disposed in the second valve chamber to switch between a second communication position and a second disconnection position. In the second communication position, the second inlet flow channel 202 and the second outlet flow channel 203 are communicated through the second valve chamber. In the second disconnection position, the second valve core 220 blocks the other end of the first inlet flow channel 102. The elastic member 230 is configured to drive the second valve core 220 to move toward the second disconnection position.

[0030] By providing the elastic member 230, the elastic force of the elastic member 230 can be used as the driving force for the second valve core 220 to move toward the second disconnection position. When the force acting on the second valve core 220 in the direction opposite to the elastic force of the elastic member 230 is less than the elastic force of the elastic member 230, the second valve core 220 can reach the second disconnection position under the action of the elastic force of the elastic member 230 and block the second inlet flow channel 202. When the high-pressure gate valve generates a driving force, the increased fluid pressure will push the second valve core 220 away from the second disconnection position, so that the second inlet flow channel 202 is communicated with the first inlet flow channel 102 through the second valve chamber. After the second inlet flow channel 202 is communicated with the first inlet flow channel 102 through the second valve chamber, the fluid pressure in the second valve chamber will gradually decrease. When the fluid pressure is too small to push the second valve core 220, the second valve core 220 will move to the second disconnection position again under the action of the elastic force and block the second inlet flow channel 202 again. Thus, the automatic pressure relief of the pressure relief valve 200 is realized, and it automatically closes after the pressure relief.

[0031] It should be noted that the second valve body 210 is fixed on the first valve body 110 so that the pressure relief valve 200 can be fixed on the first valve body 110. The specific fixing methods of the second valve body 210 and the first valve body 110 include but are not limited to welding, integral molding, and threaded connection.

[0032] As Figure 2 and Figure 3 shown, in some alternative embodiments, there may be multiple second outlet flow channels 203 to improve the pressure relief efficiency.

[0033] As Figure 2 and Figure 3As shown, in some alternative embodiments, a valve seat 130 is provided within the first valve body 110. The valve seat 130 communicates with the first valve chamber 101, the first inlet flow channel 102, and the first outlet flow channel 103. At least a portion of the first valve element 120 is capable of sliding within the valve seat 130 such that when the first valve element 120 is in the first disconnected position, the first valve element 120 can block the first inlet flow channel 102 and / or the first outlet flow channel 103 by sealingly connecting with the valve seat 130.

[0034] As Figure 2 and Figure 3 As shown, in some alternative embodiments, the second valve body 210 includes a first valve portion 211 and a second valve portion 212. One end of the first valve portion 211 is provided with a connection hole 240, and one end of the second valve portion 212 is detachably and sealingly connected to the connection hole 240. A second valve chamber is formed between the connection hole 240 and the second valve portion 212. The other end of the second valve portion 212 is fixed to the first valve body 110. The second inlet flow channel 202 and the second outlet flow channel 203 are both provided in the second valve portion 212 and penetrate through one end of the second valve portion 212 located within the connection hole 240.

[0035] Setting the second valve body 210 as the first valve portion 211 and the second valve portion 212 enables convenient installation or replacement of the second valve element 220 and the elastic member 230 after disassembling the first valve portion 211 and the second valve portion 212, achieving rapid assembly of the pressure relief valve 200. Additionally, setting both the second inlet flow channel 202 and the second outlet flow channel 203 on the second valve portion 212 facilitates machining of the second inlet flow channel 202 and the second outlet flow channel 203, and at the same time can shorten the distance between the second inlet flow channel 202 and the second outlet flow channel 203, allowing the high-pressure fluid entering from the second inlet flow channel 202 to enter the second outlet flow channel 203 and be discharged more quickly. When the second valve element 220 switches to the second disconnected position, the second valve element 220 blocks one end of the second inlet flow channel 202 that penetrates through the second valve portion 212 and is located within the connection hole 240.

[0036] As Figure 2 and Figure 3 As shown, for the sealing connection between the second valve portion 212 and the connection hole 240, in some alternative embodiments, internal threads are provided within the connection hole 240, external threads are provided on the outer surface of the second valve portion 212, and a sealing tape is wound around the external threads. Sealing is achieved by threadedly connecting the second valve portion 212 with the connection hole 240. Of course, in other embodiments, it may also be achieved by providing an O-ring on the outer surface of the second valve portion 212 and pressing the O-ring between the outer surface of the second valve portion 212 and the hole wall of the connection hole 240 to seal the connection between the second valve body and the connection hole 240.

[0037] As Figure 2 and Figure 3As shown, in some alternative embodiments, an elastic sealing block 250 is provided at one end of the second valve core 220 facing the second inlet flow channel 202, and the elastic sealing block 250 is used to seal the second inlet flow channel 202. The elastic sealing block 250 has the ability to deform. When the second valve core 220 is switched to the second disconnected position, the elastic sealing block 250 can be compressed and deformed to block one end of the second inlet flow channel 202 communicating with the second valve cavity, achieving better sealing of the second inlet flow channel 202.

[0038] As Figure 2 and Figure 3 As shown, in some alternative embodiments, a baffle 260 is provided on the outer wall of the second valve core 220. One end of the elastic member 230 is connected to the baffle 260, and the other end is connected to the bottom of the connection hole 240. The provision of the baffle 260 is beneficial for the installation of the elastic member 230, enabling the elastic member 230 to be connected to the valve stem by connecting with the baffle 260.

[0039] As Figure 2 and Figure 3 As shown, in some alternative embodiments, the outer wall of the baffle 260 is slidably and sealingly connected to the wall of the second valve cavity.

[0040] Slidably and sealingly connecting the baffle 260 to the wall of the second valve cavity can partition the second valve cavity, such that the elastic member 230 is located on one side of the baffle 260, and the second inlet flow channel 202 and the second outlet flow channel 203 are located on the other side of the baffle 260. On the one hand, it reduces the activity space of the high-pressure fluid flowing into the second valve cavity from the second inlet flow channel 202, enabling the high-pressure fluid to enter the second outlet flow channel 203 more quickly and be discharged outside the pressure relief valve 200. On the other hand, it can also reduce the contact between the high-pressure fluid flowing into the second valve cavity from the second inlet flow channel 202 and the elastic member 230, reducing the corrosion of the elastic member 230 by the high-pressure fluid and increasing the service life of the elastic member 230.

[0041] As Figure 2 and Figure 3 As shown, in some alternative embodiments, the connection hole 240 includes a first hole section 241, a second hole section 242, and a third hole section 243 connected in sequence from the bottom of the hole to the hole opening. The aperture of the third hole section 243 is larger than that of the second hole section 242, and the aperture of the second hole section 242 is larger than that of the first hole section 241. The second valve portion 212 is sealingly connected to the third hole section 243, and the baffle 260 is sealingly slidable in the second hole section 242.

[0042] The aperture of the third hole section 243 is set to be larger than that of the second hole section 242. Since the second valve part 212 is sealingly connected to the third hole section 243, the second valve part 212 cannot enter the second hole section 242, and the connection between the second hole section 242 and the third hole section 243 can play a role in installing and limiting the second valve part 212. The aperture of the second hole section 242 is set to be larger than that of the first hole section 241, so that the connection between the second hole section 242 and the first hole section 241 can play a role in slidingly limiting the baffle 260, thereby restricting the size of the activity space of the high-pressure fluid flowing into the second valve cavity from the second inflow channel 202, enabling the high-pressure fluid to enter the second outflow channel 203 more quickly and be discharged outside the pressure relief valve 200.

[0043] As Figure 2 and Figure 3 shown, in some alternative embodiments, the elastic member 230 is a spring, and the spring is sleeved outside the second valve core 220. When the second valve core 220 switches to the second communication position, the spring undergoes axial compression deformation, which can reduce the space occupied by the deformation of the elastic member 230, facilitating the reduction of the aperture of the connection hole 240, and further contributing to the reduction of the overall volume of the pressure relief valve 200.

[0044] It should be noted that when the second valve core 220 is in the second disconnection position, the spring is still in a compressed state, so that the spring can provide sufficient driving force for the second valve core 220 to enable the second valve core 220 to seal the second inflow channel 202. Regarding the structure of the elastic member 230, in other embodiments, the elastic member 230 can also be a spring sheet.

[0045] As Figure 2 and Figure 3 shown, in some alternative embodiments, a through hole is provided at the bottom of the connection hole 240, and the second valve core 220 is inserted through the through hole and sealingly connected to the through hole. One end of the second valve core 220 away from the second inflow channel 202 is located outside the second valve body 210. The part of the second valve core 220 passing through the through hole and located outside the second valve body 210 can form a force application part, enabling an operator to manually open the pressure relief valve 200 by pulling the force application part, so that the second inflow channel 202 is communicated with the second outflow channel 203.

[0046] As Figure 2 and Figure 3 shown, in some alternative embodiments, the first valve part 211 is provided with a plurality of threaded holes, and locking members 270 are screwed into the threaded holes. One end of the locking member 270 abuts against the second valve part 212. Screwing the locking member 270 into the threaded hole and abutting it against the second valve part 212 can enhance the connection stability between the first valve part 211 and the second valve part 212.

[0047] The preferred embodiments of the present disclosure have been described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0048] In addition, it should be noted that, in the above specific embodiments, the various specific technical features described can be combined in any appropriate manner without conflict. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination methods.

[0049] Furthermore, any combination can be made between various different embodiments of the present disclosure, as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.

Claims

1. A high pressure gate valve, characterized in that: Including gate valve body and pressure relief valve, The gate valve body comprises a first valve body and a first valve core, wherein a first valve cavity and a first inlet channel and a first outlet channel communicating with the first valve cavity are arranged in the first valve body, and the first valve core is movably arranged in the first valve cavity to switch between a first communicating position and a first disconnecting position, wherein in the first communicating position, the first inlet channel is communicated with the first outlet channel, and in the first disconnecting position, the first valve core blocks the first inlet channel and / or the first outlet channel; The pressure relief valve is fixed on the first valve body, and the inlet of the pressure relief valve is communicated with the first valve cavity.

2. The high pressure gate valve according to claim 1, characterized in that: The pressure relief valve includes a second valve body, a second valve core and an elastic member. The second valve body is provided with a second valve cavity and a second inlet channel and a second outlet channel connected to the second valve cavity. One end of the second inlet channel constitutes the inlet port. The second valve core is movably arranged in the second valve cavity to switch between a second connected position and a second disconnected position. In the second connected position, the second inlet channel and the second outlet channel are connected through the second valve cavity. In the second disconnected position, the second valve core blocks the other end of the second inlet channel. The elastic member is configured to drive the second valve core to move to the second disconnected position.

3. The high pressure gate valve according to claim 2, characterized in that: The second valve body includes a first valve part and a second valve part, one end of the first valve part is provided with a connecting hole, one end of the second valve part is detachably sealed and connected to the connecting hole, the connecting hole and the second valve part form the second valve cavity, the other end of the second valve part is fixed to the first valve body, the second inlet channel and the second outlet channel are both provided in the second valve part and pass through one end of the second valve part located in the connecting hole.

4. The high pressure gate valve according to claim 3, characterized in that: An elastic sealing block is disposed at one end of the second valve core facing the second inlet channel, and the elastic sealing block is used to seal one end of the second inlet channel connected to the second valve cavity.

5. The high pressure gate valve according to claim 3, characterized in that: The outer wall of the second valve core is provided with a baffle, one end of the elastic member is connected to the baffle, and the other end is connected to the bottom of the connecting hole.

6. The high pressure gate valve according to claim 5, characterized in that: The outer wall of the baffle is slidably and sealingly connected to the cavity wall of the second valve cavity.

7. The high pressure gate valve according to claim 6, characterized in that: The connecting hole includes a first hole section, a second hole section and a third hole section which are connected in sequence from the bottom of the hole to the hole mouth, the aperture of the third hole section is larger than the aperture of the second hole section, the aperture of the second hole section is larger than the aperture of the first hole section, the second valve part is sealed and connected to the third hole section, and the baffle seal slides on the second hole section.

8. The high pressure gate valve according to claim 5, characterized in that: The elastic member is a spring, and the spring is sleeved outside the second valve core.

9. The high pressure gate valve according to claim 3, characterized in that: A through hole is provided at the bottom of the connecting hole, the second valve core is penetrated through the through hole and sealedly connected to the through hole, and one end of the second valve core away from the second inlet channel is located outside the second valve body.

10. The high pressure gate valve according to any one of claims 3 to 9, characterized in that: The first valve part is provided with a plurality of threaded holes, in which locking pieces are threadedly connected, and one end of the locking piece abuts against the second valve part.

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