Self-sealing high-temperature and high-pressure stop valve

Abstract

The utility model relates to a self-sealing high-temperature high-pressure stop valve, which relates to the technical field of valves and comprises an inflow pipe, an outflow pipe, a valve body, a driving mechanism and a pressure reducing mechanism, the inflow pipe and the outflow pipe are both communicated with the valve body, and the pressure reducing mechanism comprises a valve clack, a pressure reducing plate and a limiting column. The pressure reducing plate is fixedly installed at the joint of the inflow pipe and the valve body, a plurality of pressure relief holes are formed in the pressure reducing plate, the limiting column is arranged on the pressure reducing plate, a limiting hole is formed in the valve clack, the valve clack is slidably connected to the limiting column through the limiting hole, the driving mechanism is arranged on the valve body, and the valve clack is arranged on the valve body. And the driving mechanism is used for driving the valve clack to move in the valve body. Impact force of media on the valve body mechanism can be weakened, closing torque of the valve body mechanism is reduced, and the valve body mechanism is convenient to use.

Description

Technical Field

[0001] This application relates to the field of valve technology, and in particular to a self-sealing high-temperature and high-pressure shut-off valve. Background Technology

[0002] Gate valves are widely used in media conveying pipelines in industries such as petroleum, chemical, and power. They generally consist of a valve body, valve seat, valve disc, valve stem, valve cover, and transmission device. The valve seat is fixedly installed between the inlet and outlet channels of the valve body. The lower end of the valve stem connects to the back of the valve disc, and the upper end connects to the transmission device. The transmission device drives the valve disc to rise or fall via the valve stem, thus achieving the closing or opening operation of the valve disc and valve seat. Under high-pressure conditions, to reduce the torque when the valve closes, the valve body generally adopts a high-inlet, low-outlet structure. That is, the valve body inlet channel is located on the upper side of the valve seat, and the outlet channel is located on the lower side of the valve seat, allowing the medium to enter from the upper side of the valve disc. When the valve disc closes, the valve stem pressure and the medium pressure act simultaneously on the back of the valve disc, pressing the valve disc and valve seat together to seal, increasing the sealing specific pressure, and reducing the closing torque.

[0003] A type of gate valve in related technology, currently disclosed in Chinese utility model patent application CN213871132U (publication date August 13, 2021), is a high-temperature and high-pressure gate valve, comprising a main pipe and a mounting bracket. The main pipe has a left channel on its inner left side and a right channel on its inner right side. A connecting seat is connected to the upper middle part of the main pipe, and a reinforcing block is provided on the side of the connecting seat. A valve block is placed in the middle inner part of the connecting seat, and a valve stem is connected to the upper end of the valve block. A sealing sleeve is provided on the outer side of the valve stem. The mounting bracket is connected to the upper end of the connecting seat. A bearing is connected to the upper end of the valve stem, and a threaded rod is placed on the upper end of the bearing. A turntable is installed on the upper end of the threaded rod. A lubrication sleeve is provided on the inner side of the upper end of the mounting bracket, and a small screw is connected to the middle right side of the mounting bracket. A rubber block is installed on the left end of the small screw.

[0004] However, the valve stem and valve seat of this type of gate valve are connected by a movable structure. The valve stem can move up and down through the movable structure between the valve stem and the valve seat, which facilitates the control of the valve disc. However, when the valve disc of the gate valve is opened, the pressure of the medium in the inlet channel acts on the back of the valve disc, which makes the closing torque of the handle large and inconvenient to use. Therefore, it needs to be improved. Utility Model Content

[0005] This application provides a self-sealing high-temperature and high-pressure shut-off valve, which can improve the technical problem in related technologies where the pressure of the medium in the inlet channel acts on the back of the valve disc, resulting in a large closing torque of the handle and inconvenience in use.

[0006] This application provides a self-sealing high-temperature and high-pressure shut-off valve, comprising:

[0007] The valve body comprises an inlet pipe, an outlet pipe, a valve body, a drive mechanism, and a pressure reducing mechanism. Both the inlet pipe and the outlet pipe are connected to the valve body. The pressure reducing mechanism includes a valve disc, a pressure reducing plate, and a limiting post. The pressure reducing plate is fixedly installed at the connection between the inlet pipe and the valve body. The pressure reducing plate has multiple pressure relief holes. The limiting post is disposed on the pressure reducing plate. The valve disc has a limiting hole and is slidably connected to the limiting post through the limiting hole. The drive mechanism is disposed on the valve body and is used to drive the valve disc to move within the valve body.

[0008] The technical solutions described above in this application embodiment have at least the following technical effects: When the user opens the shut-off valve, the medium flows into the valve body mechanism through the inlet hole and acts on the valve body mechanism through the pressure relief hole. When it needs to be closed, when the filling block closes the pressure relief hole, the internal pressure of the shut-off valve decreases and the closing torque decreases. At the same time, the filling block is hemispherical, and the pressure of the medium is dispersed on the surface of the sphere, which can also reduce the closing torque and make it convenient to use.

[0009] The self-sealing high-temperature and high-pressure shut-off valve provided in this application embodiment can reduce the impact force of the medium on the valve body mechanism, thereby reducing the opening torque. At the same time, the valve disc moves along the limiting rod, ensuring that the center of the valve disc is always aligned with the center of the valve body during the up-and-down movement. In this way, even if the valve stem is bent due to pressure for a long time, the swing of the valve stem will only cause the limiting ring to swing in the limiting groove, without affecting the normal up-and-down movement of the valve disc, thus improving the service life of the valve body mechanism.

[0010] In some embodiments, the valve disc is provided with a number of filling blocks equal to the number of pressure relief holes on the side near the pressure reducing plate, and the filling blocks are provided with rounded corners on the side near the pressure reducing plate.

[0011] In some embodiments, a sealing block is provided on the side of the valve disc near the pressure reducing plate, the sealing block is fixedly connected to the valve disc, and a sealing groove is provided on the side of the pressure reducing plate near the valve disc, and a sealing gasket is provided in the sealing groove.

[0012] In some embodiments, the drive mechanism includes a connecting bracket, a valve stem, a valve cover, and a rotating assembly. The valve cover is disposed on the valve body, the connecting bracket is disposed on the valve cover, the connecting bracket has a threaded hole, the valve cover has a through hole, one end of the valve stem is threaded to the connecting bracket, and the other end of the valve stem passes through the through hole and is connected to the pressure reducing plate via the rotating assembly.

[0013] In some embodiments, the rotating assembly includes a connecting block and a limiting ring. The connecting block is disposed on the side of the valve disc away from the pressure reducing plate, and a limiting groove is formed in the connecting block. The limiting ring is disposed on the end of the valve stem near the valve disc, and the limiting ring is located in the limiting groove.

[0014] In some embodiments, a rotating handle is provided at the end of the valve stem away from the connecting block. The rotating handle is coaxially connected to the valve stem, and anti-slip texture is provided on the rotating handle.

[0015] In some embodiments, a flange is provided at the end of the inlet pipe and the outlet pipe away from the valve body, and the flange has a plurality of flange holes. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A three-dimensional structural schematic diagram of a self-sealing high-temperature and high-pressure shut-off valve provided for an embodiment of this application;

[0018] Figure 2 A schematic diagram of the internal structure of a self-sealing high-temperature and high-pressure shut-off valve provided for the embodiments of the application;

[0019] Figure 3 A schematic diagram of a pressure reducing device for a self-sealing high-temperature and high-pressure shut-off valve provided in the application embodiment;

[0020] Figure 4 A schematic diagram of the valve disc structure of a self-sealing high-temperature and high-pressure shut-off valve provided for the embodiments of the application;

[0021] Figure 5 for Figure 2 Enlarged view of section A.

[0022] The following are the labeling elements in the figure:

[0023] 100. Inlet pipe; 200. Outlet pipe; 300. Valve body; 410. Connecting bracket; 420. Valve stem; 430. Valve cover; 441. Connecting block; 442. Limiting ring; 443. Limiting groove; 510. Valve disc; 511. Limiting hole; 512. Filler block; 513. Sealing block; 520. Pressure reducing plate; 521. Pressure relief hole; 530. Limiting post; 540. Sealing groove; 541. Sealing gasket; 600. Rotary handle; 710. Flange; 720. Flange hole. Detailed Implementation

[0024] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application. The terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0026] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0027] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0029] In this application, "and / or" is merely a way of describing the relationship between related objects, indicating that three relationships can exist; for example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0030] It should be noted that in this application, the words "in some embodiments," "exemplarily," and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "in some embodiments," "exemplarily," or "for example" should not be construed as being more preferred or advantageous than other embodiments or design solutions. Specifically, the use of words such as "in some embodiments," "exemplarily," and "for example" is intended to present related concepts in a specific manner, meaning that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of this application. The appearance of the above words in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0031] Gate valves are widely used in media conveying pipelines in industries such as petroleum, chemical, and power. They generally consist of a valve body, valve seat, valve disc, valve stem, valve cover, and transmission device. The valve seat is fixedly installed between the inlet and outlet channels of the valve body. The lower end of the valve stem connects to the back of the valve disc, and the upper end connects to the transmission device. The transmission device drives the valve disc to rise or fall via the valve stem, thus achieving the closing or opening operation of the valve disc and valve seat. Under high-pressure conditions, to reduce the torque when the valve closes, the valve body generally adopts a high-inlet, low-outlet structure. That is, the valve body inlet channel is located on the upper side of the valve seat, and the outlet channel is located on the lower side of the valve seat, allowing the medium to enter from the upper side of the valve disc. When the valve disc closes, the valve stem pressure and the medium pressure act simultaneously on the back of the valve disc, pressing the valve disc and valve seat together to seal, increasing the sealing specific pressure, and reducing the closing torque.

[0032] However, the valve stem and valve seat of this type of gate valve are connected by a movable structure. The valve stem can move up and down through the movable structure between the valve stem and the valve seat, which facilitates the control of the valve disc. However, when the valve disc of the gate valve is opened, the pressure of the medium in the inlet channel acts on the back of the valve disc, which makes the opening torque of the handle large and inconvenient to use. Therefore, it needs to be improved.

[0033] Based on this, in order to improve the problem in related technologies where the pressure of the medium in the inlet channel acts on the back of the valve disc, resulting in a large closing torque of the handle and inconvenience in use, the embodiments of this application provide the following solution.

[0034] Please refer to the following: Figures 1 to 5This application provides a self-sealing high-temperature and high-pressure shut-off valve, including an inflow pipe 100, an outflow pipe 200, a valve body 300, a drive mechanism, and a pressure reducing mechanism. The inflow pipe 100 and the outflow pipe 200 are both connected to the valve body 300. The pressure reducing mechanism includes a valve disc 510, a pressure reducing plate 520, and a limiting post 530. The pressure reducing plate 520 is fixedly installed at the connection between the inflow pipe 100 and the valve body 300. The pressure reducing plate 520 has multiple pressure relief holes 521. The limiting post 530 is disposed on the pressure reducing plate 520. The valve disc 510 has a limiting hole 511 and is slidably connected to the limiting post 530 through the limiting hole 511. The drive mechanism is disposed on the valve body 300 and is used to drive the valve disc 510 to move within the valve body 300.

[0035] As can be seen from the above, when the user opens the shut-off valve, the medium flows into the valve body 300 through the inlet hole. The medium force acts on the valve disc 510 through the pressure relief hole 521. When it needs to be closed, when the filling block 512 closes in the pressure relief hole 521, the internal pressure of the shut-off valve decreases and the closing torque decreases. At the same time, a limiting hole 511 is also provided on the valve disc 510. The valve disc 510 moves up and down in the limiting hole 511 with the limiting pin 530, ensuring that the center of the valve disc 510 is always aligned with the center of the valve body 300 during the up and down movement and will not be offset.

[0036] In some embodiments, please refer to the following: Figures 1 to 5 The valve disc 510 is provided with a number of filling blocks 512 on the side near the pressure reducing plate 520, the same number as the pressure relief holes 521. The filling blocks 512 are provided with rounded corners on the side near the pressure reducing plate 520.

[0037] With this configuration, when the user closes the shut-off valve, the filling block 512 is hemispherical, and the pressure of the medium is distributed on the surface of the ball, which reduces the closing torque and makes it easier to use.

[0038] Optionally, please refer to Figures 2 to 4 A sealing block 513 is provided on the side of the valve disc 510 near the pressure reducing plate 520. The sealing block 513 is fixedly connected to the valve disc 510. A sealing groove 540 is provided on the side of the pressure reducing plate 520 near the valve disc 510. A sealing gasket 541 is provided in the sealing groove 540.

[0039] With this configuration, when the valve disc 510 moves down, the sealing block 513 on the valve disc 510 is inserted into the sealing groove 540 on the pressure reducing plate 520. At the same time, a sealing gasket 541 is set in the sealing groove 540. All of these can improve the sealing effect between the valve disc 510 and the pressure reducing plate 520, and prevent the shut-off valve from leaking when it is closed.

[0040] In some embodiments, please refer to Figures 2 to 4 The driving mechanism includes a connecting bracket 410, a valve stem 420, a valve cover 430, and a rotating assembly. The valve cover 430 is disposed on the valve body 300, and the connecting bracket 410 is disposed on the valve cover 430. The connecting bracket 410 has a threaded hole, and the valve cover 430 has a through hole. One end of the valve stem 420 is threaded to the connecting bracket 410, and the other end of the valve stem 420 passes through the through hole and is connected to the pressure reducing plate 520 via the rotating assembly.

[0041] With this configuration, the valve cover 430 is placed on the valve body 300, ensuring that the medium inside the shut-off valve will not flow out. At the same time, the connecting bracket 410 can play a certain role in fixing the valve stem 420, preventing the valve stem 420 from shifting during displacement.

[0042] Optionally, in some embodiments, please refer to Figure 2 and Figure 5 The rotating assembly includes a connecting block 441 and a limiting ring 442. The connecting block 441 is disposed on the side of the valve disc 510 away from the pressure reducing plate 520. A limiting groove 443 is formed in the connecting block 441. The limiting ring 442 is disposed on the end of the valve stem 420 near the valve disc 510, and the limiting ring 442 is located in the limiting groove 443.

[0043] With this configuration, a connecting block 441 is provided, allowing the valve stem 420 to rotate within the connecting block 441. The valve stem 420 engages with the limiting groove 443 in the connecting block 441 via a limiting ring 442. The valve stem 420 can deviate within a certain range in the connecting block 441 without affecting the normal up-and-down movement of the valve disc 510. Furthermore, during the downward movement, the valve disc 510 does not rotate with the valve stem 420, preventing additional frictional loss during the sealing process between the valve disc 510 and the pressure reducing plate 520, thus effectively extending the service life of the valve disc 510.

[0044] Optionally, please refer to Figures 1 to 5 The valve stem 420 is provided with a rotating handle 600 at the end away from the connecting block 441. The rotating handle 600 is coaxially connected to the valve stem 420, and anti-slip texture is provided on the rotating handle 600.

[0045] With this design, the valve stem 420 will rise and fall under the action of the rotating handle 600, making it convenient to open or close the shut-off valve. At the same time, anti-slip textures are made on the surface of the rotating handle 600 to increase the friction between the user's palm and the rotating handle 600 and prevent slippage.

[0046] Optionally, please refer to Figures 1 to 5The inflow pipe 100 and the outflow pipe 200 are provided with a flange 710 at the end away from the valve body 300, and the flange 710 is provided with a plurality of flange holes 720.

[0047] With this configuration, the flange 710 is welded and fixed to the inlet pipe 100 and the outlet pipe 200, and several flange holes 720 are provided on the flange 710 to facilitate the connection of the outlet pipe 200 with external pipes for drainage and gas transmission.

[0048] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A self-sealing high-temperature and high-pressure shut-off valve, characterized in that: The device includes an inflow pipe (100), an outflow pipe (200), a valve body (300), a drive mechanism, and a pressure reducing mechanism. Both the inflow pipe (100) and the outflow pipe (200) are connected to the valve body (300). The pressure reducing mechanism includes a valve disc (510), a pressure reducing plate (520), and a limiting post (530). The pressure reducing plate (520) is fixedly installed at the connection between the inflow pipe (100) and the valve body (300). The pressure reducing plate (520) has multiple pressure relief holes (521). The limiting post (530) is set on the pressure reducing plate (520). The valve disc (510) has a limiting hole (511). The valve disc (510) is slidably connected to the limiting post (530) through the limiting hole (511). The drive mechanism is set on the valve body (300) and is used to drive the valve disc (510) to move within the valve body (300).

2. The self-sealing high-temperature and high-pressure shut-off valve according to claim 1, characterized in that: The valve disc (510) has a number of filler blocks (512) on the side near the pressure reducing plate (520) that are the same as the number of pressure relief holes (521), and the filler blocks (512) have rounded corners on the side near the pressure reducing plate (520).

3. The self-sealing high-temperature and high-pressure shut-off valve according to claim 2, characterized in that: A sealing block (513) is provided on the side of the valve disc (510) near the pressure reducing plate (520). The sealing block (513) is fixedly connected to the valve disc (510). A sealing groove (540) is provided on the side of the pressure reducing plate (520) near the valve disc (510). A sealing gasket (541) is provided in the sealing groove (540).

4. A self-sealing high-temperature and high-pressure shut-off valve according to any one of claims 1-3, characterized in that: The drive mechanism includes a connecting bracket (410), a valve stem (420), a valve cover (430), and a rotating assembly. The valve cover (430) is mounted on the valve body (300), and the connecting bracket (410) is mounted on the valve cover (430). The connecting bracket (410) has a threaded hole, and the valve cover (430) has a through hole. One end of the valve stem (420) is threaded to the connecting bracket (410), and the other end of the valve stem (420) passes through the through hole and is connected to the pressure reducing plate (520) via the rotating assembly.

5. The self-sealing high-temperature and high-pressure shut-off valve according to claim 4, characterized in that: The rotating assembly includes a connecting block (441) and a limiting ring (442). The connecting block (441) is located on the side of the valve disc (510) away from the pressure reducing plate (520). A limiting groove (443) is formed in the connecting block (441). The limiting ring (442) is located on the end of the valve stem (420) near the valve disc (510) and is located in the limiting groove (443).

6. The self-sealing high-temperature and high-pressure shut-off valve according to claim 5, characterized in that: A rotating handle (600) is provided at one end of the valve stem (420) away from the connecting block (441). The rotating handle (600) is coaxially connected to the valve stem (420), and anti-slip texture is provided on the rotating handle (600).

7. The self-sealing high-temperature and high-pressure shut-off valve according to claim 6, characterized in that: The inflow pipe (100) and the outflow pipe (200) are provided with a flange (710) at the end away from the valve body (300), and the flange (710) has a plurality of flange holes (720).

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