Adjustable micro-flow self-operated micro-pressure valve

Abstract

The utility model discloses an adjustable micro-flow self-operated micro-pressure valve, which comprises a valve body, a valve seat, a valve cover and a valve rod, wherein the valve seat is arranged in the valve body; the valve cover is arranged on the valve body; the valve rod is movably connected with the valve cover and one end of the valve rod is positioned in the valve body; the valve is characterized in that the valve element is arranged at the end, located in the valve body, of the valve rod and is in a conical shape, and the valve element is further provided with a spiral circulation groove which is formed along the central axis of the valve element and used for increasing fluid flow resistance so as to achieve the speed reduction and pressure reduction effects. According to the utility model, the valve core is provided with the spiral circulating groove which is arranged around the axis of the middle part of the valve core, and when the valve core is opened, the flow resistance of fluid is effectively increased through the spiral circulating groove, so that the speed reduction and pressure reduction effects are achieved; the sealing conical surface is arranged on the valve ring matched with the valve element, the fluid flow can be accurately adjusted through matching of the sealing conical surface and the conical surface of the valve element, and the sealing performance of the valve seat can be effectively improved during sealing.

Description

Technical Field

[0001] This utility model relates to a self-operated micro-pressure valve, specifically an adjustable micro-flow self-operated micro-pressure valve. Background Technology

[0002] Existing self-operated micro-pressure valves suffer from drawbacks such as large flow regulation deviations, severe flow fluctuations, and low control accuracy. Particularly when the flow rate in the pipeline system experiences significant periodic variations, the large pressure fluctuations before and after the valve cause frequent valve core opening and closing, resulting in severe vibration under high medium pressure fluctuations. This leads to excessive medium pressure on the valve core, making it impossible to meet the flow regulation accuracy requirements and thus failing to satisfy the increasingly demanding automatic control needs of low-flow-rate applications. Therefore, an adjustable low-flow self-operated micro-pressure valve is proposed. Utility Model Content

[0003] The purpose of this invention is to solve the above problems by proposing an adjustable micro-flow self-regulating micro-pressure valve.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an adjustable micro-flow self-operated micro-pressure valve, comprising a valve body, a valve seat installed inside the valve body, a valve cover installed on the valve body, and a valve stem movably connected to the valve cover with one end inside the valve body; characterized in that a valve core with a tapered end located inside the valve body is also provided, and the valve core is further provided with a spiral flow groove arranged along the central axis of the valve core to increase the fluid flow resistance and thus reduce pressure.

[0005] More preferably, it also includes a valve ring mounted on a valve seat and a pressure plate for mounting the valve ring on the valve seat, wherein the valve ring is provided with a sealing cone surface that mates with the valve core.

[0006] A further preferred embodiment includes a recess on the valve seat that defines the installation position of the valve ring.

[0007] Further preferably, it also includes a needle valve mounted on the valve body, the needle valve comprising a needle valve body mounted on the valve body, a needle valve stem movably mounted on the needle valve body, a needle valve core disposed at one end of the needle valve stem and cooperating with a valve seat, an adjusting member mounted on the needle valve stem, and a protective cover mounted on the needle valve body.

[0008] A further preferred embodiment includes a bracket mounted on the valve cover and an actuator mounted on the bracket and connected to the other end of the valve stem.

[0009] The beneficial effects of this utility model are as follows: by setting a spiral flow groove around the central axis of the valve core, the fluid flow resistance is effectively increased through the spiral flow groove when the valve core is opened, thereby achieving the effect of deceleration and pressure reduction.

[0010] By setting a sealing cone surface in the valve ring that mates with the valve core, the fluid flow rate can be precisely adjusted by the engagement of the sealing cone surface with the cone surface of the valve core. It can also effectively improve the sealing performance of the valve seat during sealing.

[0011] By installing a needle valve on the valve body, the flow area between the needle valve core and the valve seat can be adjusted to coarsely regulate the flow rate of the medium flowing through the throttling gap. When the flow rate of the pipeline system fluctuates significantly and the valve core can no longer meet the flow regulation needs, or when the opening and closing action is frequent and the vibration is severe, the flow area between the needle valve core and the valve seat can be adjusted to ensure that the medium pressure borne by the valve core is within a precisely adjustable range. This improves the overall adjustable range of the valve and expands its adaptability to flow fluctuations in the pipeline system. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a partial structural schematic diagram of the present invention;

[0014] Figure 3 This is a partial structural schematic diagram of the present invention.

[0015] Legend: 1. Valve body; 2. Valve seat; 21. Valve ring; 22. Pressure plate; 23. Sealing cone surface; 24. Recess; 3. Valve cover; 4. Valve stem; 5. Valve core; 51. Spiral flow groove; 6. Needle valve; 61. Needle valve body; 62. Needle valve stem; 63. Needle valve core; 64. Adjusting component; 65. Protective cover; 7. Bracket; 8. Actuator. Detailed Implementation

[0016] The adjustable micro-flow self-operated micro-pressure valve of this utility model will be further described below with reference to the accompanying drawings.

[0017] It should be noted that all directional indicators such as up, down, left, right, front, back, etc. in the embodiments of this utility model are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indicator will also change accordingly.

[0018] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly; for example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0019] See Figures 1-3 As shown, an adjustable micro-flow self-operated micro-pressure valve includes a valve body 1, a valve seat 2 installed in the valve body 1, a valve cover 3 installed on the valve body 1, and a valve stem 4 movably connected to the valve cover 3 and with one end inside the valve body 1; characterized in that a valve core 5 is also provided with a tapered end of the valve stem 4 inside the valve body 1, and the valve core 5 is also provided with a spiral flow groove 51 arranged along the central axis of the valve core 5 to increase the fluid flow resistance and play a role in deceleration and pressure reduction;

[0020] By providing a spiral flow groove 51 around the central axis of the valve core 5, the flow resistance of the fluid is effectively increased through the spiral flow groove 51 when the valve core 5 is opened, thereby achieving the effect of deceleration and pressure reduction.

[0021] In one embodiment, the valve ring 21 mounted on the valve seat 2 and a pressure plate 22 for mounting the valve ring 21 on the valve seat 2 are also included. The valve ring 21 is provided with a sealing cone surface 23 that cooperates with the valve core 5. By providing a sealing cone surface 23 on the valve ring 21 that cooperates with the valve core 5, the fluid flow rate can be precisely adjusted by the cooperation between the sealing cone surface 23 and the cone surface of the valve core 5. The sealing performance of the valve seat 2 can also be effectively improved during sealing.

[0022] In one embodiment, a recess 24 is also provided on the valve seat 2 to limit the installation position of the valve ring 21. The recess 24 limits the installation position of the valve ring 21. At the same time, the valve ring 21 can be used to limit the sealing position when the sealing cone surface 23 of the valve ring 21 is worn and the sealing performance is poor. Only the valve ring 21 needs to be replaced, without replacing the entire valve seat 2, thus saving costs.

[0023] In one embodiment, a needle valve 6 is also included on the valve body 1. The needle valve 6 includes a needle valve body 61 mounted on the valve body 1, a needle valve stem 62 movably mounted on the needle valve body 61, a needle valve core 63 disposed at one end of the needle valve stem 62 and cooperating with the valve seat 2, an adjusting member 64 mounted on the needle valve stem 62, and a protective cover 65 mounted on the needle valve body 61.

[0024] By setting a needle valve 6 on the valve body 1, the flow area between the needle valve core 63 and the valve seat 2 can be adjusted to coarsely adjust the flow rate of the medium flowing through the throttling gap. During adjustment, rotating the adjusting component 64 causes the needle valve stem 62 to move up and down on the needle valve body 61, thereby causing the needle valve core 63 to move up and down, thus adjusting the flow area between the needle valve core 63 and the valve seat 2, thereby coarsely adjusting the flow rate of the medium.

[0025] When the flow rate fluctuation range of the pipeline system undergoes large periodic changes, and the valve core 5 can no longer meet the flow regulation needs, or when the opening and closing actions are frequent and the vibration is severe, the flow area between the needle valve core 63 and the valve seat 2 can be adjusted so that the medium pressure borne by the valve core 5 is within the range that can be precisely adjusted, thereby improving the overall adjustable range of the valve, that is, expanding the range of adaptability to the flow rate fluctuation of the pipeline system.

[0026] In one embodiment, the device further includes a bracket 7 mounted on the valve cover 3 and an actuator 8 mounted on the bracket 7 and connected to the other end of the valve stem 4. The diaphragm cavity in the actuator 8 is connected to the pre-valve and post-valve pipelines of the pipeline system through a pipeline and then adjusts the position of the valve stem 4 and the valve core 5 by means of the pre-valve and post-valve pressures.

[0027] The scope of protection of this utility model is not limited to the above embodiments and their variations. Conventional modifications and substitutions made by those skilled in the art based on the content of these embodiments are all within the scope of protection of this utility model.

Claims

1. An adjustable micro-flow self-operated micro-pressure valve, comprising a valve body (1), a valve seat (2) installed inside the valve body (1), a valve cover (3) installed on the valve body (1), and a valve stem (4) movably connected to the valve cover (3) and having one end inside the valve body (1); characterized in that... A valve core (5) is also provided at one end of the valve stem (4) inside the valve body (1) in a conical shape. The valve core (5) is also provided with a spiral flow groove (51) along the central axis of the valve core (5) to increase the fluid flow resistance and play a role in deceleration and pressure reduction.

2. The adjustable micro-flow self-operated micro-pressure valve according to claim 1, characterized in that: It also includes a valve ring (21) mounted on the valve seat (2) and a pressure plate (22) for mounting the valve ring (21) on the valve seat (2), wherein the valve ring (21) is provided with a sealing cone surface (23) that cooperates with the valve core (5).

3. The adjustable micro-flow self-operated micro-pressure valve according to claim 2, characterized in that: It also includes a recess (24) on the valve seat (2) that limits the installation position of the valve ring (21).

4. The adjustable micro-flow self-operated micro-pressure valve according to claim 1, characterized in that: It also includes a needle valve (6) installed on the valve body (1), the needle valve (6) comprising a needle valve body (61) installed on the valve body (1), a needle valve stem (62) movably installed on the needle valve body (61), a needle valve core (63) disposed at one end of the needle valve stem (62) and cooperating with the valve seat (2), an adjusting member (64) installed on the needle valve stem (62), and a protective cover (65) installed on the needle valve body (61).

5. The adjustable micro-flow self-operated micro-pressure valve according to claim 1, characterized in that: It also includes a bracket (7) mounted on the valve cover (3) and an actuator (8) mounted on the bracket (7) and connected to the other end of the valve stem (4).

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