High-temperature-resistant and high-pressure-resistant hard sealing ball valve

Abstract

The utility model discloses a high-temperature-resistant and high-pressure-resistant hard sealing ball valve which comprises a valve shell, an opening and closing assembly capable of being locked is installed on the valve shell, a positioning assembly used for positioning the opening and closing assembly is installed at the position, corresponding to the opening and closing assembly, of the valve shell, and the opening and closing assembly comprises a valve plate matched with the valve shell. A valve rod used for driving the valve plate to turn over is installed at the top of the valve plate, and a detachable opening and closing handle is installed at the top of the valve rod. According to the utility model, innovative design is carried out aiming at the positioning problem of the valve rod, and by arranging the special clamping assembly, when the valve rod rotates to a required position, the valve rod can be accurately and stably positioned by clamping the positioning bolt into the corresponding positioning hole, so that the valve rod is effectively prevented from being mistakenly touched; the reliable valve rod positioning function ensures the stability of the valve in an opening or closing state, and prevents the state change of the valve caused by maloperation of the valve rod, so that the stability and the safety in the production process are ensured.

Description

Technical Field

[0001] This utility model relates to the field of ball valve technology, and in particular to a hard-seal ball valve resistant to high temperature and high pressure. Background Technology

[0002] In industrial production, especially in sectors like petrochemicals, power generation, and metallurgy, numerous high-temperature and high-pressure operating environments exist. In these environments, ball valves, as crucial fluid control devices, are widely used in pipeline systems for cutting off, connecting, distributing, or changing the flow direction of media. Traditional ball valves face many challenges under high-temperature and high-pressure conditions.

[0003] On the one hand, high temperatures can cause thermal expansion and deformation of the ball valve materials. For example, when the temperature exceeds a certain limit, the valve stem may elongate. In some common ball valve designs, elongated stems can easily jam the ball, causing valve malfunction and affecting the normal operation of the entire production process. Simultaneously, high temperatures can also adversely affect the sealing performance of the ball valve. The sealing material may soften and age due to high temperatures, leading to seal failure and media leakage. This not only wastes resources but may also pollute the environment and even cause safety accidents.

[0004] On the other hand, high-pressure conditions place higher demands on the structural strength and sealing performance of ball valves. Ball valves need to withstand enormous pressure; if the structural design is unreasonable or the material strength is insufficient, problems such as deformation and cracking can easily occur, making it impossible to guarantee the reliable operation of the valve. Moreover, under high pressure, the opening and closing operation of the valve requires greater torque, which also poses greater challenges to the valve's drive device and operating mechanism.

[0005] Furthermore, the positioning of the valve stem is a significant issue in the actual use of ball valves. Due to complex on-site environments and human operation factors, the valve stem is easily accidentally actuated after rotation, leading to changes in the valve's state and affecting production stability and safety. For example, in chemical production processes, if the ball valve stem is accidentally actuated, it may cause changes in parameters such as the flow rate and pressure of the medium in the pipeline, thereby affecting the process control of the entire production process and potentially leading to a decline in product quality or production accidents.

[0006] While some high-temperature and high-pressure resistant ball valves exist on the market, such as the Chinese patent CN211599602U, which discloses a hard-seal ball valve, comprising a valve body, two valve seats fixed in the valve body cavity, a valve ball abutting between the two valve seats, and a valve stem extending into the valve ball at one end. The valve ball has a through hole in its center for media flow, and the valve stem can drive the valve ball to rotate relative to the valve body. The surface of the valve ball has a fixing groove located on the side of the valve seat near and / or away from the valve stem. When the valve ball rotates, the sidewall of the fixing groove does not contact the valve seat or valve body. However, there are still shortcomings in valve stem positioning. Some ball valves lack effective valve stem positioning devices, or the positioning devices are complex in structure and have poor reliability, failing to meet the stability and safety requirements of industrial production for ball valves. Utility Model Content

[0007] The purpose of this invention is to provide a high-temperature and high-pressure resistant hard-seal ball valve. An innovative design addresses the valve stem positioning problem by incorporating a specialized locking assembly. When the valve stem is rotated to the desired position, it can be accurately and stably positioned by engaging the corresponding positioning hole with a positioning bolt. This effectively prevents accidental valve stem movement. This reliable valve stem positioning function ensures the stability of the valve in both open and closed states, preventing changes in valve status due to accidental valve stem movement, thereby guaranteeing the stability and safety of the production process.

[0008] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0009] A high-temperature, high-pressure resistant hard-seal ball valve, comprising:

[0010] A valve housing, on which a lockable opening and closing assembly is mounted, and a positioning assembly for positioning the opening and closing assembly is mounted on the valve housing at a position corresponding to the opening and closing assembly.

[0011] The aforementioned high-temperature and high-pressure resistant hard-seal ball valve includes an opening and closing assembly comprising a valve plate that matches the valve housing, a valve stem for driving the valve plate to rotate is mounted on the top of the valve plate, and a detachable opening and closing handle is mounted on the top of the valve stem.

[0012] In the aforementioned high-temperature and high-pressure resistant hard-seal ball valve, the top of the valve stem is fixedly connected to a mounting bolt, and the opening and closing handle is installed on the mounting bolt by a mounting nut.

[0013] In the aforementioned high-temperature and high-pressure resistant hard-seal ball valve, a sealing ring is installed on the top of the valve body at a position corresponding to the valve stem.

[0014] The aforementioned high-temperature and high-pressure resistant hard-seal ball valve includes a positioning assembly comprising a mounting shell fixedly connected to the top of the valve body, and snap-fit ​​assemblies for driving the valve stem installed on both sides of the mounting shell. A positioning disc is fixedly connected to the valve stem, and a plurality of positioning holes are equidistantly arranged at the edge of the positioning disc corresponding to the position of the snap-fit ​​assemblies.

[0015] In the aforementioned high-temperature and high-pressure resistant hard-seal ball valve, the snap-fit ​​assembly includes a threaded seat fixedly connected to the side of the mounting housing, and a positioning bolt that matches the positioning hole is threaded onto the threaded seat.

[0016] In the aforementioned high-temperature and high-pressure resistant hard-seal ball valve, a limiting bearing sleeve for limiting the valve stem is installed on the top of the mounting housing at a position corresponding to the valve stem.

[0017] This utility model has at least the following beneficial effects:

[0018] This invention presents a high-temperature and high-pressure resistant hard-seal ball valve. An innovative design addresses the valve stem positioning issue by incorporating a specialized locking assembly. Once the valve stem is rotated to the desired position, it engages with the corresponding positioning hole via a positioning bolt, ensuring accurate and stable positioning. This effectively prevents accidental valve stem movement. This reliable valve stem positioning function ensures the stability of the valve in both open and closed states, preventing changes in valve status due to accidental valve stem movement, thereby guaranteeing the stability and safety of the production process. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0020] Figure 1 This is a schematic diagram of the structure of the high temperature and high pressure resistant hard-seal ball valve of this utility model;

[0021] Figure 2 This is a cross-sectional structural diagram of the high-temperature and high-pressure resistant hard-seal ball valve of this utility model.

[0022] Figure 3 This is a schematic diagram of the opening and closing assembly in the high-temperature and high-pressure resistant hard-seal ball valve of this utility model.

[0023] Figure 4 This is a schematic diagram of the positioning component in the high-temperature and high-pressure resistant hard-seal ball valve of this utility model.

[0024] Figure 5 This is a schematic diagram of the snap-fit ​​assembly in the high-temperature and high-pressure resistant hard-seal ball valve of this utility model.

[0025] Explanation of icon numbers:

[0026] 1. Valve housing; 2. Opening and closing assembly; 3. Positioning assembly;

[0027] 201, Valve plate; 2011, Valve stem; 20111, Sealing ring;

[0028] 202. Opening / closing handle; 2021. Installing bolts; 2022. Installing nuts;

[0029] 301. Mounting housing; 302. Snap-fit ​​assembly; 3021. Positioning plate; 3022. Positioning hole;

[0030] 303, threaded seat; 3031, positioning bolt; 304, limit bearing sleeve. Detailed Implementation

[0031] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0032] Please refer to Figures 1 to 5 As shown, an embodiment of the present invention provides a high-temperature and high-pressure resistant hard-seal ball valve, comprising: a valve body 1, a lockable opening and closing assembly 2 installed on the valve body 1, and a positioning assembly 3 for positioning the opening and closing assembly 2 installed on the valve body 1 at a position corresponding to the opening and closing assembly 2.

[0033] Among them, the valve body 1 and the valve plate 201 are treated by supersonic spraying, nickel-based spray welding and special surface hardening process. The high hardness and high temperature resistance enable the ball valve to work stably under the harsh conditions of high temperature and high pressure, ensuring the sealing performance and structural strength of the valve.

[0034] The opening and closing assembly 2 includes a valve plate 201 that matches the valve housing 1. A valve stem 2011 for driving the valve plate 201 to flip is installed on the top of the valve plate 201. A detachable opening and closing handle 202 is installed on the top of the valve stem 2011.

[0035] By adopting the above technical solution, an innovative design was made to address the positioning problem of the valve stem 2011. By setting a special snap-fit ​​component 302, when the valve stem 2011 is rotated to the required position, it can be snapped into the corresponding positioning hole 3022 by the positioning bolt 3031, so as to accurately and stably position the valve stem 2011. This effectively avoids the valve stem 2011 being accidentally touched. This reliable valve stem 2011 positioning function ensures the stability of the valve in the open or closed state and prevents the valve state from changing due to accidental movement of the valve stem 2011, thereby ensuring the stability and safety of the production process.

[0036] To make the connection and disassembly of the opening / closing handle 202 and the valve stem 2011 extremely convenient, when it is necessary to install the opening / closing handle 202, simply tighten the mounting nut 2022 onto the mounting bolt 2021 to complete the installation; when it is necessary to replace or remove the opening / closing handle 202, simply unscrew the mounting nut 2022 to easily remove the opening / closing handle 202. This structure facilitates operation according to actual needs, and whether it is routine maintenance or replacement due to handle damage, it can be completed quickly, greatly improving work efficiency and reducing operational difficulty. In this embodiment, the top of the valve stem 2011 is fixedly connected to the mounting bolt 2021, and the opening / closing handle 202 is installed on the mounting bolt 2021 by the mounting nut 2022.

[0037] In order to effectively prevent the medium from leaking from the connection between the valve stem 2011 and the valve body 1, the valve stem 2011 needs to rotate frequently during the operation of the ball valve, and small gaps are easily generated at the connection, which can lead to medium leakage. The sealing ring 20111 has good elasticity and sealing performance, and can fit tightly between the valve stem 2011 and the valve body 1 to fill the possible gaps, ensure the sealing effect of the ball valve, and avoid resource waste, environmental pollution and potential safety hazards caused by medium leakage. In this embodiment, the sealing ring 20111 is installed on the top of the valve body 1 at the position corresponding to the valve stem 2011.

[0038] In order to accurately and stably position the valve stem 2011 after it is rotated to the desired position by the opening and closing handle 202, the positioning bolt 3031 can be turned and driven into the corresponding positioning hole 3022 by the thread action of the threaded seat 303, thereby effectively preventing the valve stem 2011 from being accidentally touched, in this embodiment: the positioning component 3 includes a mounting shell 301 fixedly connected to the top of the valve body 1. Both sides of the mounting shell 301 are equipped with a snap-fit ​​component 302 for driving the valve stem 2011. A positioning disc 3021 is fixedly connected to the valve stem 2011. Several positioning holes 3022 are evenly arranged at the edge of the positioning disc 3021 and at the position corresponding to the snap-fit ​​component 302. The snap-fit ​​component 302 includes a threaded seat 303 fixedly connected to the side of the mounting shell 301. The threaded seat 303 is threadedly connected to the positioning bolt 3031 that matches the positioning hole 3022.

[0039] In order to provide good limiting and support for the valve stem 2011 and reduce the shaking and offset of the valve stem 2011 during rotation, in this embodiment: a limiting bearing sleeve 304 for limiting the valve stem 2011 is installed on the top of the mounting shell 301 at the position corresponding to the valve stem 2011.

[0040] The working principle of this utility model is as follows: An innovative design addresses the positioning problem of the valve stem 2011. By setting a dedicated snap-fit ​​component 302, when the valve stem 2011 is rotated to the desired position via the opening / closing handle 202, the positioning bolt 3031 can be tightened. Under the action of the threaded seat 303, the positioning bolt 3031 is driven into the corresponding positioning hole 3022, thereby accurately and stably positioning the valve stem 2011. This effectively prevents the valve stem 2011 from being accidentally activated. This reliable valve stem 2011 positioning function ensures the stability of the valve in both open and closed states, preventing changes in the valve state due to accidental activation of the valve stem 2011, thus guaranteeing the stability and safety of the production process.

[0041] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A high temperature and high pressure resistant hard-seal ball valve comprising a valve housing (1), characterized in that, The valve shell (1) is provided with a lockable opening and closing assembly (2), and the valve shell (1) is provided with a positioning assembly (3) corresponding to the position of the opening and closing assembly (2) for positioning the opening and closing assembly (2).

2. The high temperature and high pressure resistant hard-sealed ball valve according to claim 1, characterized in that: The opening and closing assembly (2) comprises a valve plate (201) matched with the valve shell (1), and the top of the valve plate (201) is provided with a valve rod (2011) for driving the valve plate (201) to overturn, and the top of the valve rod (2011) is provided with a detachable opening and closing handle (202).

3. The high temperature and high pressure resistant hard-sealed ball valve according to claim 2, characterized in that: The top of the valve rod (2011) is fixedly connected with a mounting bolt (2021), and the opening and closing handle (202) is mounted on the mounting bolt (2021) through a mounting nut (2022).

4. The high temperature and high pressure resistant hard-sealed ball valve according to claim 3, characterized in that: The top of the valve shell (1) is provided with a sealing ring (20111) corresponding to the position of the valve rod (2011).

5. The high temperature and high pressure resistant hard-sealed ball valve according to claim 4, characterized in that: The positioning assembly (3) comprises a mounting shell (301) fixedly connected to the top of the valve shell (1), and both sides of the mounting shell (301) are provided with a clamping assembly (302) for driving the valve rod (2011), and the valve rod (2011) is fixedly connected with a positioning disc (3021), and the edge of the positioning disc (3021) is provided with a plurality of positioning holes (3022) arranged at equal distances corresponding to the position of the clamping assembly (302).

6. The high temperature and high pressure resistant hard-sealed ball valve according to claim 5, characterized in that: The clamping assembly (302) comprises a threaded seat (303) fixedly connected to the side of the mounting shell (301), and the threaded seat (303) is threadedly connected with a positioning bolt (3031) matched with the positioning hole (3022).

7. The high temperature and high pressure resistant hard-sealed ball valve according to claim 6, characterized in that: The top of the mounting shell (301) is provided with a limiting bearing sleeve (304) corresponding to the position of the valve rod (2011) for limiting the valve rod (2011).

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