Valve structure suitable for high-temperature and high-pressure working conditions

Abstract

The valve structure comprises a valve body and a valve rod, a reinforcing rod portion is arranged in the middle of the valve rod, conventional rod portions are arranged at the two ends of the valve rod, a valve plate base assembly is installed on the periphery of the reinforcing rod portion, a medium hole is formed in the middle of the valve body, valve body holes are formed in the two sides of the medium hole, and the valve plate base assembly is located in the medium hole. The conventional rod part is rotationally installed in a valve body hole, a sealing surface is arranged between the valve body and the valve plate base assembly, and the valve plate base assembly is of a split structure and is composed of a valve plate base, a sealing gasket and a base pressing plate; a valve rod hole is formed in the valve plate base, the base pressing plate is installed on the side face of the valve plate base, and the sealing gasket is installed between the valve plate base and the base pressing plate in a pressing mode. By reducing the diameter of the valve rod of the conventional rod part, the integral torque of the valve can be effectively reduced, and at the moment, a small-sized actuating mechanism can be selected, so that the cost is saved.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology and relates to a valve structure suitable for high temperature and high pressure conditions. Background Technology

[0002] Valves are widely used in oil and gas, petrochemical, environmental protection, power, and metallurgy industries, including many high-temperature and high-pressure applications. In such scenarios, the middle of the valve stem bears the strongest operating pressure, while the ends experience less stress. Using a cylindrical valve stem would result in higher costs. Summary of the Invention

[0003] The purpose of this invention is to provide a valve structure suitable for high temperature and high pressure conditions, which can solve the above problems and allows for the selection of a smaller actuator.

[0004] According to the technical solution provided by this utility model: a valve structure suitable for high temperature and high pressure conditions includes a valve body and a valve stem. The middle part of the valve stem is a reinforcing rod, and the two ends of the valve stem are conventional rods. A valve plate base assembly is installed on the outer periphery of the reinforcing rod. The middle of the valve body is a medium hole, and the two sides of the medium hole are valve body holes. The valve plate base assembly is located in the medium hole. The conventional rod is rotatably installed in the valve body hole. A sealing surface is provided between the valve body and the valve plate base assembly.

[0005] As a further improvement of this utility model, the valve plate base assembly adopts a split structure, consisting of a valve plate base, a sealing gasket, and a base pressure plate; the valve plate base is provided with a valve stem hole, the base pressure plate is installed on the side of the valve plate base, and the sealing gasket is press-fitted between the valve plate base and the base pressure plate.

[0006] As a further improvement of this utility model, a sealing boss is provided in the medium hole, and a matching sealing bevel is provided on the sealing boss and the sealing gasket.

[0007] As a further improvement of this utility model, a limiting ring is installed in the valve body.

[0008] As a further improvement of this utility model, the valve body is provided with an installation groove, the limiting ring is placed in the installation groove, and the valve plate base is provided with a limiting boss on the outer periphery.

[0009] As a further improvement of this utility model, the outer periphery of the reinforcing rod is connected to the valve plate base via a flat key.

[0010] As a further improvement of this utility model, an installation notch is provided in the middle of the valve plate base.

[0011] As a further improvement of this utility model, a bearing and a packing assembly are installed in the valve body hole, and the bearing and packing assembly are sleeved on the outer periphery of the conventional rod.

[0012] As a further improvement of this utility model, when the valve stem is made of the same material, the size of the reinforced stem is larger than that of the conventional stem.

[0013] The positive and progressive effects of this application are as follows:

[0014] 1. By reducing the diameter of the valve stem in the conventional stem section, this utility model can effectively reduce the overall torque of the valve, allowing for the selection of a smaller actuator and saving costs;

[0015] 2. By reducing the diameter of the conventional rods at both ends, this utility model can appropriately reduce the overall wall thickness at the upper and lower shaft ends of the valve while ensuring the minimum wall thickness, thus saving valve casting materials;

[0016] 3. Under high temperature and high pressure conditions, the allowable stress of the material will be significantly reduced due to temperature. Therefore, by appropriately thickening the reinforcing rod, the valve stem can be ensured to have sufficient material strength. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0018] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0020] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this utility model described herein. Furthermore, terms such as "comprising" and "having" mean that in addition to those already listed in "comprising" and "having," other unlisted contents may also be included; for example, a process, method, system, product, or device may include a series of steps or units, not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products, or devices.

[0021] Due to the angle of the drawing, some parts may not be drawn, but their positions and connections can be understood from the text descriptions.

[0022] like Figure 1 As shown, this utility model is a valve structure suitable for high temperature and high pressure conditions, including a valve body 1 and a valve stem 3. The valve stem 3 has a reinforcing rod 3-1 in the middle and conventional rods 3-2 at both ends. A valve plate base assembly 2 is installed on the outer periphery of the reinforcing rod 3-1. The valve body 1 has a medium hole in the middle and valve body holes on both sides of the medium hole. The valve plate base assembly 2 is located in the medium hole. The conventional rod 3-2 is rotatably installed in the valve body hole. A sealing surface is provided between the valve body 1 and the valve plate base assembly 2.

[0023] The valve plate base assembly 2 adopts a split structure, consisting of a valve plate base 2-1, a sealing gasket 2-2, and a base pressure plate 2-3. The valve plate base 2-1 has a valve stem hole, and the base pressure plate 2-3 is installed on the side of the valve plate base 2-1. The sealing gasket 2-2 is press-fitted between the valve plate base 2-1 and the base pressure plate 2-3.

[0024] A sealing boss 1-1 is provided in the medium hole, and a matching sealing bevel is provided on the sealing boss 1-1 and the sealing gasket 2-2.

[0025] To ensure the sealing performance between the sealing boss 1-1 and the sealing gasket 2-2, a limiting ring 4 is installed in the valve body 1. Specifically, the valve body 1 has an installation groove, in which the limiting ring 4 is placed, and a limiting boss is provided on the outer periphery of the valve plate base 2-1. In this embodiment, the valve stem 3 is vertically arranged, and the limiting ring 4 is located below the limiting boss. Under the action of gravity, the limiting boss abuts against the limiting ring 4 on the valve plate base 2-1. When the valve stem 3 is horizontally arranged, the limiting boss is tightly attached to the limiting ring 4, preventing the valve plate base 2-1 from moving horizontally.

[0026] The outer periphery of the reinforcing rod 3-1 is connected to the valve plate base 2-1 via a flat key 5. To facilitate the installation of the flat key 5, an installation notch 2-11 is provided in the middle of the valve plate base 2-1.

[0027] Bearing 6 and packing assembly 7 are installed in the valve body hole. Bearing 6 and packing assembly 7 are sleeved on the outer periphery of the conventional stem 3-2. Bearing 6 ensures that the valve stem 3 rotates smoothly in the valve body 1, and packing assembly 7 ensures the sealing between the valve stem 3 and the valve body 1.

[0028] When the valve stem 3 is made of the same material, the reinforced stem 3-1 is larger than the conventional stem 3-2, ensuring that the conventional stem 3-2 of the valve stem 3 can use a smaller actuator, saving costs. The reinforced stem 3-1 ensures sufficient material strength in the high-temperature medium orifice.

[0029] During installation, first install the limiting ring 4 at the corresponding position on the valve body 1. Then, place the valve plate base assembly 2 in a suitable position, aligning it with the limiting ring 4. Pass the valve stem 3 sequentially through the valve body 1, valve plate base assembly 2, and limiting ring 4. The valve stem 3 and valve plate base assembly are connected by a key 5. Finally, insert the packing 7 and bearing 6 sequentially to complete the overall installation. This structure achieves a sealing function by rotating the valve stem 3, which in turn moves the valve plate assembly 2.

[0030] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of this utility model, and the utility model is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of this utility model, and these modifications and improvements are also considered to be within the protection scope of this utility model.

Claims

1. A valve structure suitable for high temperature and high pressure conditions, characterized in that, The valve includes a valve body (1) and a valve stem (3). The middle part of the valve stem (3) is a reinforcing rod (3-1), and the two ends of the valve stem (3) are conventional rods (3-2). The valve plate base assembly (2) is installed on the outer periphery of the reinforcing rod (3-1). The middle of the valve body (1) is a medium hole, and the two sides of the medium hole are valve body holes. The valve plate base assembly (2) is located in the medium hole. The conventional rod (3-2) is rotatably installed in the valve body hole. A sealing surface is provided between the valve body (1) and the valve plate base assembly (2).

2. The valve structure as described in claim 1, suitable for high temperature and high pressure conditions, is characterized in that, The valve plate base assembly (2) adopts a split structure, consisting of a valve plate base (2-1), a sealing gasket (2-2), and a base pressure plate (2-3). The valve plate base (2-1) is provided with a valve stem hole, and the base pressure plate (2-3) is installed on the side of the valve plate base (2-1). The sealing gasket (2-2) is press-fitted between the valve plate base (2-1) and the base pressure plate (2-3).

3. The valve structure as described in claim 2, suitable for high temperature and high pressure conditions, is characterized in that... A sealing boss (1-1) is provided in the medium hole, and a matching sealing bevel is provided on the sealing boss (1-1) and the sealing gasket (2-2).

4. The valve structure as described in claim 1, suitable for high temperature and high pressure conditions, is characterized in that, A limit ring (4) is installed in the valve body (1).

5. The valve structure as described in claim 4, suitable for high temperature and high pressure conditions, is characterized in that... The valve body (1) is provided with an installation groove, the limiting ring (4) is placed in the installation groove, and the valve plate base (2-1) is provided with a limiting boss on its outer periphery.

6. The valve structure as described in claim 2, suitable for high temperature and high pressure conditions, is characterized in that, The outer periphery of the reinforcing rod (3-1) is connected to the valve plate base (2-1) via a flat key (5).

7. The valve structure as described in claim 1, suitable for high temperature and high pressure conditions, is characterized in that, The valve plate base (2-1) has an installation notch (2-11) in the middle.

8. The valve structure as described in claim 1, suitable for high temperature and high pressure conditions, is characterized in that, A bearing (6) and a packing assembly (7) are installed in the valve body hole. The bearing (6) and the packing assembly (7) are fitted around the outer periphery of the conventional rod (3-2).

9. The valve structure as described in claim 1, suitable for high temperature and high pressure conditions, characterized in that, When the valve stem (3) is made of the same material, the size of the reinforcing stem (3-1) is larger than that of the conventional stem (3-2).

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