Soft sealing self-operated regulating valve

Abstract

The soft sealing self-operated regulating valve comprises a regulating screw rod, a spring box, a control spring, a valve membrane head, a valve membrane, a valve body, a valve rod, a valve core, a rubber gasket and a valve plug, wherein the adjusting screw rod penetrates through the top of the spring box and is in direct contact connection with the control spring arranged in the spring box; the control spring is connected with the valve membrane head through direct contact, the valve membrane is connected between the valve membrane head and the valve body through contact, and the valve membrane head is connected with two ends of the valve body respectively. The valve rod is in contact connection with the valve membrane, the valve rod sequentially penetrates through the valve element and the rubber gasket and is in direct contact connection with the valve plug, and the valve body is connected with the valve element. Therefore, the technical problems that an existing valve cannot reach the designed and used pressure adjusting requirement range, the sealing face of the valve is prone to being damaged, and the service cycle is short can be solved.

Description

Technical Field

[0001] The utility model relates to the field of machinery, in particular to a soft-sealing self-acting regulating valve. Background Art

[0002] Soft seal means using a relatively soft material as a sealing gasket. The existing MR95L type self-acting regulating valve is a hard seal and a direct contact seal between metal and metal. In the process of implementing the utility model, it is found that the existing structure has poor sealing effect, unstable regulating pressure, and the pressure regulating range can only be between 0KP - 35KP, which cannot reach the designed regulating range, resulting in unstable gas supply to the reactor gas rack, and the gas rack system cannot work properly, thus causing the reactor to fail to start smoothly, and the service life of the sealing surface is short. Content of the Utility Model

[0003] In view of this, the embodiment of the utility model provides an energy-saving rectification system, which can solve the technical problems that the existing valves cannot reach the designed regulating pressure requirement range, are prone to damage the sealing surface of the valves, and have a short service life.

[0004] To achieve the above object, according to the embodiment of the utility model, a soft-sealing self-acting regulating valve is provided, which includes an adjusting screw, a spring box, a control spring, a valve diaphragm head, a valve diaphragm, a valve body, a valve stem, a valve core, a rubber gasket and a valve plug; wherein, the adjusting screw passes through the top of the spring box and is directly in contact with the control spring placed inside the spring box; the control spring is connected to the valve diaphragm head by direct contact, the valve diaphragm is connected by contact between the valve diaphragm head and the valve body, and both ends of the valve diaphragm head and the valve body are respectively connected; the valve stem is connected to the valve diaphragm by contact, the valve stem passes through the valve core and the rubber gasket in sequence, and is directly in contact with the valve plug, and the valve body is connected to the valve core.

[0005] Optionally, it includes: the adjusting screw is threadedly connected to the top of the spring box.

[0006] Optionally, it includes: both ends of the valve diaphragm head and the valve body are respectively bolted by cap screws.

[0007] Optionally, it includes: a valve stem guide sleeve embedded in the valve body, and the valve stem passes through the valve stem guide sleeve.

[0008] Optionally, it includes: a valve plug guide sleeve directly in contact with the valve plug.

[0009] Optionally, it includes: the valve body is threadedly connected to the valve core and the valve plug guide sleeve.

[0010] Optionally, it includes: the rubber gasket is arranged between the valve core and the valve plug, and is respectively connected to the valve core and the valve plug by contact.

[0011] Optionally, the valve stem includes a first part with a round cake shape at the top, a second part with a cylindrical shape in the middle section, and a third part with a cylindrical shape at the bottom end.

[0012] Optionally, it includes: extending the second part of the valve stem to a preset length.

[0013] One embodiment of the above utility model has the following advantages or beneficial effects: The soft-sealed self-acting regulating valve provided by the present utility model can be used for regulating the gas source pressure in industrial production, providing a stable gas source for the system, with remarkable sealing effect, large adjustment range, long service life (for example, it can be extended to about six years), stable production, and reducing the transformation cost by repairing and reusing old parts; further, changing the self-acting regulating valve (for example, MR95L type) from hard seal to soft seal, the valve achieves a good sealing effect, and its adjustment range reaches 0KP - 200KP, meeting the process use requirements, providing a stable gas source for the gas rack in the ultra-pure silicon production department, and providing favorable conditions for the smooth start-up of the reactor.

[0014] The further effects of the above non-conventional optional methods will be described below in combination with specific embodiments. Description of the Drawings

[0015] The drawings are used to better understand the present utility model and do not constitute an improper limitation to the present utility model. Among them:

[0016] Figure 1 is a schematic structural diagram of a soft-sealed self-acting regulating valve according to an embodiment of the present utility model. Detailed Embodiments

[0017] The following describes exemplary embodiments of the present utility model in conjunction with the drawings. Various details of the embodiments of the present utility model are included to assist in understanding, and they should be considered merely exemplary. Therefore, those of ordinary skill in the art should recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present utility model. Similarly, for clarity and conciseness, descriptions of well-known functions and structures are omitted in the following description.

[0018] At least one embodiment of the present utility model provides a soft-sealed self-acting regulating valve, which is a main device required for gas source regulation and system gas supply in industrial production, such as Figure 1As shown, the soft-sealed self-acting regulating valve may include an adjusting screw 8, a spring box 2, a control spring 11, a valve diaphragm head 12, a valve diaphragm 9, a valve body 1, a valve stem 6, a valve core 3, a rubber gasket 13, and a valve plug 4. In an embodiment, the adjusting screw 8 passes through the top of the spring box 2 and is directly in contact with and connected to the control spring 11 placed inside the spring box 2. The control spring 11 is connected to the valve diaphragm head 12 by direct contact. The valve diaphragm 9 is connected by contact between the valve diaphragm head 12 and the valve body 1, and both ends of the valve diaphragm head 12 and the valve body 1 are connected respectively. The valve stem 6 is connected to the valve diaphragm 9 by contact. The valve stem 6 passes through the valve core 3 and the rubber gasket 13 in sequence and is directly in contact with and connected to the valve plug 4. The valve body 1 is connected to the valve core 3.

[0019] Exemplarily, it can be applied to the MR95L self-acting regulating valve, changing from a hard seal to a soft seal, effectively improving the valve sealing performance, making it more stable, saving costs, having a stable system, high production efficiency, and reducing valve damage.

[0020] It is worth noting that both ends of the valve diaphragm head 12 and the valve body 1 can be bolt-connected by cap screws 10 respectively. Additionally, the adjusting screw 8 and the top of the spring box 2 are thread-connected.

[0021] As some preferred embodiments, the rubber gasket 13 of the soft-sealed self-acting regulating valve of the present utility model is arranged between the valve core 3 and the valve plug 4 and is respectively connected to the valve core 3 and the valve plug 4 by contact. Thus, by adjusting the adjusting screw 8, the soft-seal design of the rubber gasket 13 can reach the working pressure required by the process.

[0022] As a preferred embodiment of the present utility model, the valve stem 6 of the soft-sealed self-acting regulating valve may include a first part with a round cake shape at the top, a second part with a cylindrical shape in the middle section, and a third part with a cylindrical shape at the bottom end. Further, the second part of the valve stem 6 is extended to a preset length.

[0023] Exemplarily, the valve stem 6 can be integrally machined from a stainless steel bar by a lathe. The valve stem 6 is mainly divided into three parts. The first part is the top of the valve stem with a round cake shape: φ25mm, thickness 3mm. The second part is the middle section of the valve stem with a cylindrical shape: φ3.5mm, length 36mm. The third part is the bottom end of the valve stem with a cylindrical shape: φ2.0mm, length 3mm.

[0024] As another embodiment of the present utility model, as Figure 1 shown, the soft-sealed self-acting regulating valve includes a valve plug guide sleeve 5 that is directly in contact with and connected to the valve plug 4. In a further embodiment, the valve body 1 is thread-connected to the valve core 3 and the valve plug guide sleeve 5.

[0025] In another embodiment, the soft-sealed self-acting regulating valve includes a valve stem guide sleeve 7 that is inlaid and connected to the valve body 1, and the valve stem 6 passes through the valve stem guide sleeve 7.

[0026] It should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "linkage", etc. may refer to fixed connection, detachable connection, or integral connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] The above specific implementation manners do not constitute a limitation to the protection scope of the present utility model. Those skilled in the art should understand that various modifications, combinations, sub - combinations, and substitutions can occur depending on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A soft-sealed self-operated regulating valve, characterized in that: Including adjusting screw, spring box, control spring, valve diaphragm head, valve diaphragm, valve body, valve stem, valve core, rubber gasket and valve plug; The adjusting screw passes through the top of the spring box and directly contacts and connects with the control spring placed inside the spring box; The control spring is connected to the valve diaphragm head by direct contact, the valve diaphragm is connected to the valve body by contact in the middle of the valve diaphragm head, and the valve diaphragm head is connected to both ends of the valve body respectively; The valve stem is connected to the valve diaphragm by contact, the valve stem passes through the valve core and the rubber gasket in sequence, and is connected to the valve plug by direct contact, and the valve body is connected to the valve core.

2. The soft-sealed self-operated regulating valve according to claim 1, characterized in that: include: The adjusting screw is connected to the top of the spring box through threads.

3. The soft-sealed self-operated regulating valve according to claim 1, characterized in that: include: The diaphragm head and both ends of the valve body are connected by cap screws and bolts.

4. The soft-sealed self-operated regulating valve according to claim 1, characterized in that: include: A valve stem guide sleeve is embedded in the valve body, and the valve stem passes through the valve stem guide sleeve.

5. The soft-sealed self-operated regulating valve according to claim 1, characterized in that: include: A valve plug guide that is directly connected to the valve plug.

6. The soft-sealed self-operated regulating valve according to claim 5, characterized in that: include: The valve body is connected to the valve core and the valve plug guide sleeve through threads.

7. The soft-sealed self-operated regulating valve according to claim 1, characterized in that: include: The rubber gasket is arranged between the valve core and the valve plug, and is respectively connected with the valve core and the valve plug through contact.

8. The soft-sealed self-operated regulating valve according to any one of claims 1 to 7, characterized in that: The valve stem comprises a first part with a top pancake shape, a second part with a middle section cylindrical shape and a third part with a bottom cylindrical shape.

9. The soft-sealed self-operated regulating valve according to claim 8, characterized in that: include: Extend the second portion of the valve stem to a predetermined length.

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