Wear-resistant and anti-blocking small-flow regulating valve sealing structure

Abstract

The utility model relates to a wear-resistant anti-blocking small-flow regulating valve sealing structure which comprises a valve body, a flow channel is arranged in the valve body, an inlet and an outlet are formed in the two ends of the flow channel respectively, a valve seat is arranged in the middle of the flow channel, a valve deck is arranged on the valve body, a valve rod is arranged in the valve deck in a sliding mode, and a valve element is installed on the lower portion of the valve rod. A valve core sealing conical surface, a transition fillet, a valve core plugging section and a valve core taper adjusting section are sequentially arranged on the valve core; the valve seat is sequentially provided with a valve seat sealing inclined face, a valve seat receding hole and a valve seat throttling hole. The valve seat receding hole below the valve seat sealing face is utilized, deformation of the valve seat sealing face can be effectively prevented, and the sealing performance of the valve is improved; a valve seat avoiding hole structure below the sealing surface of the valve seat can prevent the valve seat from being deformed due to the influence of external conditions, so that the valve core and the valve seat are mutually rubbed, and the adjusting performance is influenced; and the valve core is provided with a non-adjusting surface matched with the avoiding hole of the valve seat, so that the curve of the valve core can control the flow more accurately and stably.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology and relates to a wear-resistant and anti-jamming sealing structure for a small flow regulating valve. Background Technology

[0002] With the rapid development of industries such as chemical engineering, the control requirements for micro-flow regulating valves are becoming increasingly stringent. Ordinary micro-flow regulating valves on the market suffer from poor flow control and short valve life due to their small adjustment gap, easy wear of the valve core, poor sealing performance, and poor regulation performance. Therefore, there is a need for a sealing structure for micro-flow regulating valves that is easy to process, prevents valve core wear and jamming, and ensures stable operation. Summary of the Invention

[0003] The purpose of this invention is to provide a wear-resistant and anti-jamming sealing structure for a small flow regulating valve, which can solve the problem and enable the valve core curve to control the flow more accurately and stably.

[0004] According to the technical solution provided by this utility model: a wear-resistant and anti-jamming small flow regulating valve sealing structure includes a valve body, a flow channel in the valve body, an inlet and an outlet at both ends of the flow channel, a valve seat in the middle of the flow channel, a valve cover on the valve body, a valve stem slidably disposed in the valve body and the valve cover, and a valve core installed at the lower part of the valve stem; the valve core is provided with a valve core sealing cone surface, a transition fillet, a valve core blocking section, and a valve core tapered adjustment section in sequence; the valve seat is provided with a valve seat sealing inclined surface, a valve seat clearance hole, and a valve seat throttling hole in sequence.

[0005] As a further improvement of this utility model, the valve seat clearance hole is divided into a vertical clearance section, a contraction section, and a rounded transition section in sequence, and the valve seat sealing slope and the valve core sealing cone surface are compatible.

[0006] As a further improvement of this utility model, the angle α1 of the valve seat sealing slope is greater than the angle α2 of the valve core sealing cone.

[0007] As a further improvement of this utility model, the orifice size D1 of the vertical clearance section is larger than the orifice size D2 of the valve seat throttling orifice.

[0008] As a further improvement of this utility model, the size D of the valve core sealing section is adapted to the orifice size D2 of the valve seat throttling hole.

[0009] As a further improvement of this utility model, a valve stem hole is provided inside the valve cover.

[0010] As a further improvement of this utility model, the valve stem slides within the valve stem hole.

[0011] As a further improvement of this utility model, a guide sleeve is installed at the lower part of the valve stem hole.

[0012] As a further improvement of this utility model, the valve core slides in the guide sleeve.

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

[0014] This invention utilizes a valve seat clearance hole beneath the valve seat sealing surface to effectively prevent deformation of the valve seat sealing surface and improve valve sealing performance. The clearance hole structure also prevents deformation of the valve seat due to external conditions, thus preventing friction between the valve core and the valve seat and affecting regulating performance. The valve core has a non-regulating surface that matches the clearance hole, allowing for more accurate and stable flow control. The valve core experiences less wear and has a longer service life, making it widely applicable to process control requiring minute flow regulation. This invention features a simple and robust overall structure, easy-to-process valve seat clearance hole structure, and more accurate and stable valve regulating performance. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 for Figure 1 Enlarged schematic diagram of region I in the middle.

[0017] Figure 3 for Figure 2 Schematic diagram of the middle valve seat.

[0018] Figure 4 for Figure 2 A schematic diagram of the middle valve core. Detailed Implementation

[0019] 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] like Figures 1-2 As shown, this utility model is a wear-resistant and anti-jamming small flow regulating valve sealing structure, including a valve body 1, a flow channel in the valve body 1, an inlet 1-1 and an outlet 1-2 at both ends of the flow channel, a valve seat 2 in the middle of the flow channel, a valve cover 6 on the valve body 1, a valve stem 5 slidably arranged in the valve body 1 and the valve cover 6, and a valve core 3 installed at the lower part of the valve stem 5.

[0024] like Figure 3 As shown, the valve seat 2 is sequentially provided with a valve seat sealing slope 21, a valve seat clearance hole, and a valve seat throttling hole 25; the valve seat clearance hole is sequentially divided into a vertical clearance section 22, a contraction section 23, and a rounded transition section 24. Figure 4 As shown, the valve core 3 is sequentially provided with a valve core sealing cone surface 34, a transition fillet 33, a valve core sealing section 32, and a valve core taper adjustment section 31. The valve seat sealing slope 21 and the valve core sealing cone surface 34 are adapted to each other. The angle α1 of the valve seat sealing slope 21 is greater than the angle α2 of the valve core sealing cone surface 34, so that the valve seat 2 and the valve core 3 sealing cone surface can have better contact, improving the sealing level; the valve seat 2 is provided with a valve seat clearance hole, which can avoid the transition fillet 33 under the valve core sealing cone surface 34, so that the valve has better sealing performance.

[0025] The orifice size D1 of the vertical clearance section 22 is larger than the orifice size D2 of the valve seat throttling orifice 25 to prevent the valve core from being scratched and deformed due to misalignment during installation, which would affect the valve's sealing performance.

[0026] The valve seat clearance hole can effectively prevent local temperature changes caused by the medium flowing through the valve seat throttling hole 25. Thermal expansion and contraction cause slight changes in the valve seat size, resulting in friction between the valve core 3 and the valve seat 2, scratching the surface of the valve core 3 and affecting the regulation performance.

[0027] The valve seat clearance hole can prevent the valve seat sealing slope 21 from deforming inward due to the thrust of the actuator, reducing the diameter of the hole, causing the valve core 3 to rub against the valve seat hole, scratching the valve core surface, and affecting the regulating performance.

[0028] The dimension D of the valve core sealing section 32 is adapted to the orifice dimension D2 of the valve seat throttling orifice 25, such as... Figure 2 As shown, when the valve seat sealing inclined surface 21 and the valve core sealing cone surface 34 come into contact, the bottom of the valve core blocking section 32 extends into the valve seat throttling hole 25, so that the valve core adjusting surface 31 starts to adjust from the valve seat throttling hole 25, and the valve core curve can control the flow more accurately and stably.

[0029] A valve stem hole 7 is provided inside the valve cover 6. The valve stem 5 slides in the valve stem hole 7. A guide sleeve 4 is installed at the lower part of the valve stem hole 7. The guide sleeve 4 plays a guiding role when the valve core 3 moves up and down.

[0030] The valve core taper adjustment section 31 uses a smaller flow taper, which can control the flow more accurately and stably.

[0031] The wear-resistant and anti-jamming sealing structure of the small flow regulating valve described above can effectively prevent valve core wear and jamming, giving the valve better sealing performance and enabling more accurate and stable flow control. It is simple to process and can be widely used in micro-flow regulating valve equipment.

[0032] 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 small flow regulating valve sealing structure resistant to wear and seizure, comprising a valve body (1) having a flow passage, an inlet (1-1) and an outlet (1-2) at both ends of the flow passage, and a valve seat (2) in the middle of the flow passage, a valve cover (6) being provided on the valve body (1), a valve stem (5) being slidably provided in the valve body (1) and the valve cover (6), and a valve core (3) being mounted on the lower part of the valve stem (5), characterized in that, A valve core (3) is sequentially provided with a valve core sealing taper surface (34), a transition round corner (33), a valve core plugging section (32), and a valve core taper adjusting section (31); a valve seat (2) is sequentially provided with a valve seat sealing bevel (21), a valve seat avoiding hole, and a valve seat throttling hole (25).

2. The wear resistant, anti-stiction, low flow regulator valve seal structure of claim 1, wherein, The valve seat avoiding hole is sequentially divided into a vertical avoiding section (22), a contraction section (23), and a round corner transition section (24), the valve seat sealing bevel (21) and the valve core sealing taper surface (34) are adapted to each other.

3. The wear resistant, anti-seizing, low flow regulator valve seal structure of claim 2, wherein, An angle α1 of the valve seat sealing bevel (21) is greater than an angle α2 of the valve core sealing taper surface (34).

4. The wear resistant, anti-seizing, low flow regulator valve seal of claim 2, wherein, An orifice size D1 of the vertical avoiding section (22) is greater than an orifice size D2 of the valve seat throttling hole (25).

5. The wear resistant, anti-seizing, low flow control valve seal of claim 1, wherein, A size D of the valve core plugging section (32) is adapted to the orifice size D2 of the valve seat throttling hole (25).

6. The wear resistant, anti-stiction, low flow regulator valve seal of claim 1, wherein, A valve cover (6) is provided with a valve rod hole (7) therein.

7. The wear resistant, anti-seizing, low flow regulator valve seal structure of claim 6 wherein, A valve rod (5) slides in the valve rod hole (7).

8. The wear resistant, anti-stiction, low flow regulator valve seal of claim 1, wherein, A guide sleeve (4) is installed at a lower part of the valve rod hole (7).

9. The wear resistant, anti-stiction, low flow regulator valve seal structure of claim 8, wherein, The valve core (3) slides in the guide sleeve (4).

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