Micro flow regulating valve

Abstract

The utility model belongs to the field of valves, and particularly relates to a micro flow regulating valve. The utility model provides a micro flow regulating valve. The micro flow regulating valve comprises a valve body, a valve seat and a valve core, the middle of the valve seat is provided with a channel communicated with an inlet and an outlet of the valve body. A blind hole is formed in the bottom of the valve element, a through hole communicated with the blind hole is formed in the side wall of the valve element, and the lower portion of the valve element is inserted into the channel. According to the micro flow regulating valve, progressive flow regulation can be achieved, the precision of flow regulation is improved, meanwhile, the abrasion resistance of the valve element and the valve seat is improved, and the situation of sealing failure is delayed.

Description

Technical Field

[0001] The utility model belongs to the field of valves, and particularly relates to a micro-flow regulating valve. Background Art

[0002] There are generally two problems with existing micro-flow regulating valves. One is poor regulation accuracy. Especially during the process from no flow to having flow, it is almost a jump-type regulation method and cannot achieve progressive regulation. Another problem is that the contact surface between the valve core and the valve seat is relatively narrow, and leakage is likely to occur after a long time. Summary of the Utility Model

[0003] A micro-flow regulating valve provided by the utility model can effectively solve the problems in the background art.

[0004] A micro-flow regulating valve provided by the utility model includes a valve body, a valve seat and a valve core; the valve seat is arranged in the cavity of the valve body, and a channel communicating with the inlet and outlet of the valve body is arranged in the middle of the valve seat; a blind hole is arranged at the bottom of the valve core, a through hole communicating with the blind hole is arranged on the side wall of the valve core, and the lower part of the valve core is inserted into the channel.

[0005] As a further optimization of the utility model, the channel is cylindrical.

[0006] As a further optimization of the utility model, the lower part of the valve core penetrates through the channel.

[0007] As a further optimization of the utility model, the cross-section of the through hole is fan-shaped and the arc end is located below.

[0008] As a further optimization of the utility model, the width of the through hole does not exceed the width of the blind hole.

[0009] As a further optimization of the utility model, in the closed state, the blind hole penetrates through the channel in the length direction.

[0010] As a further optimization of the utility model, it further includes a valve stem; the bottom end of the valve stem is connected to the top end of the valve core.

[0011] As a further optimization of the utility model, the valve stem and the valve core are integrally formed.

[0012] As a further optimization of the utility model, the blind hole penetrates through the through hole.

[0013] A micro-flow regulating valve provided by the utility model can achieve progressive flow regulation, improve the accuracy of flow regulation, and at the same time improve the wear resistance of the valve core and the valve seat, and delay the occurrence of seal failure. Brief Description of the Drawings

[0014] Figure 1 It is a schematic cross-sectional structure diagram of this embodiment;

[0015] Among them, there are valve body 1, inlet 1a, outlet 1b, cavity 1c, valve seat 2, valve core 3, blind hole 3a, through hole 3b, and valve rod 4. Detailed implementation manner

[0016] As Figure 1 shown, this embodiment includes valve body 1, valve seat 2, and valve core 3.

[0017] A cavity 1c is provided inside the valve body 1, and the cavity 1c communicates with the inlet 1a and the outlet 1b of the valve body 1.

[0018] The valve seat 2 is arranged inside the cavity 1c of the valve body 1 and is located between the passages of the inlet 1a and the outlet 1b of the valve body 1. A passage communicating the inlet 1a and the outlet 1b is provided in the middle of the valve seat 2. In this embodiment, the passage is in a cylindrical shape.

[0019] The lower part of the valve core 3 is in a cylindrical shape corresponding to the shape of the passage. The lower part of the valve core 3 is inserted into the passage and penetrates through the passage, so that the side wall of the valve core 3 completely covers the inner wall of the passage, maximizing the contact area. On the one hand, it can improve the sealing effect, and on the other hand, it reduces the wear of the contact surface caused by the back-and-forth separation and contact between the valve core 3 and the valve seat 2, and thus delays the time when the sealing fails due to wear.

[0020] A blind hole 3a is provided at the bottom of the valve core 3, and a through hole 3b communicating with the blind hole 3a is provided on the side wall of the valve core 3. In this embodiment, the width of the through hole 3b does not exceed that of the blind hole 3a, and the through hole 3b is in a shape with a sector-shaped cross-section and the arc end of the sector is located below. In this way, when the valve core 3 is slowly lifted, first the tip of the sector emerges from the upper surface of the valve seat 2, then the triangle gradually emerges, and finally the entire sector is exposed. The fluid first flows out from the tip of the sector, and then as the triangle is continuously exposed, the flow rate becomes larger and larger, thus playing the role of accurately controlling the flow rate and gradually controlling the flow rate.

[0021] In this embodiment, when the valve is in the closed state, the blind hole 3a penetrates the passage in the length direction. This setting can leave a reasonable space for the setting of the through hole 3b, so that when the valve is closed, the tip of the sector is exactly located on the upper surface of the valve seat 2, and at the moment when the valve core 3 is lifted, the fluid can flow through.

[0022] This embodiment further includes a valve rod 4, and the lower part of the valve rod 4 is directly made into the valve core 3. In other embodiments, the valve rod 4 and the valve core 3 can also be made into two parts, and the lower end of the valve rod 4 is used to connect the top end of the valve core 3 for connection and use.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than limiting the protection scope of the present utility model. Although the present utility model has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present utility model can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present utility model. The orientation terms such as "upper", "lower", "left", "right", "front", "rear", "bottom", "top", etc. described in this application are only for better explaining this application, rather than aiming to limit the scope of this application.

Claims

1. A micro flow control valve, characterized in that, It includes a valve body, a valve seat and a valve core; the valve seat is arranged in the cavity of the valve body, and a channel communicating with the inlet and outlet of the valve body is provided in the middle of the valve seat; a blind hole is provided at the bottom of the valve core, a through hole communicating with the blind hole is provided on the side wall of the valve core, and the lower part of the valve core is inserted into the channel.

2. The micro flow regulating valve according to claim 1, characterized in that, The channel is cylindrical.

3. A micro flow regulating valve according to claim 1, characterized in that, The lower part of the valve core penetrates through the channel.

4. A micro flow control valve according to claim 1, wherein, The cross-section of the through hole is fan-shaped and the arc end is located below.

5. A micro flow control valve according to claim 1, characterized in that, The width of the through hole does not exceed the width of the blind hole.

6. A micro flow control valve according to claim 1, characterized in that, In the closed state, the blind hole penetrates through the channel in the length direction.

7. A micro flow control valve according to claim 1, characterized in that, It further includes a valve stem; the bottom end of the valve stem is connected to the top end of the valve core.

8. A micro flow control valve according to claim 7, characterized in that, The valve stem and the valve core are integrally formed.

9. The micro flow regulating valve according to claim 1, characterized in that, The blind hole penetrates through the through hole.

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