A needle valve gate with easy flow adjustment

Abstract

The utility model relates to valve technical field, concretely is a needle valve convenient to adjust flow, including valve body, needle valve core, valve cover and adjusting handle, the just below of valve body is liquid inlet, the upper side of liquid inlet is liquid outlet, needle valve core is located the upper side of liquid inlet and can move up and down with adjusting handle, the valve cover is located the upper side of valve body, adjusting handle and needle valve core between pass through screw rod and locking screw fixed, needle valve core is equipped with limit sealing boss, flow limiting boss and optical axis, the valve body also is equipped with the hole cooperation, flow limiting boss blocks liquid outlet when the valve is closed, and realizes the flow control along with adjusting handle up and down movement. Its advantages: first, the distance between adjusting boss and liquid outlet is realized flow control, and is equipped with three sealing structures, avoids the leakage, second, relatively simple structure, low in production and manufacturing cost.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a needle valve that facilitates flow regulation. Background Technology

[0002] Needle valves are commonly used in vacuum systems. A typical needle valve operates in two states: open and closed. The valve plug is needle-shaped, and the seal between the needle-shaped sealing shaft and the valve seat is achieved through a tight fit between their conical surfaces. In existing technology, flow regulation of needle valves involves: the needle-shaped sealing shaft being connected to a drive rod via a thread; the drive rod rotates, causing the needle-shaped sealing shaft to reciprocate within the valve body. The flow rate is regulated by the distance the needle-shaped sealing shaft moves away from the valve seat. However, this method results in unstable flow control. Utility Model Content

[0003] To achieve the above objectives, this utility model provides the following technical solution: a needle valve for easy flow adjustment, comprising a valve body 1, a needle valve core 2, a valve cover 10, and an adjusting handle 11. The valve body 1 has an inlet 16 directly below it and an outlet 15 on one side above the inlet 16. The needle valve core 2 is positioned above the inlet 16 and can move up and down with the adjusting handle 11. The valve cover 10 is positioned above the valve body 1. The adjusting handle 11 and the needle valve core 2 are fixed together by a screw 13 and a locking screw 12. The needle valve core 2 is characterized by having a limiting sealing boss 3, a flow-limiting boss 6, and a light shaft 8. The valve body 1 also has a corresponding hole. The flow-limiting boss 6 blocks the outlet 15 when the valve is closed and adjusts the flow rate by moving up and down with the adjusting handle 11.

[0004] Furthermore, the valve body 1 is provided with a sealing step 4 that cooperates with the flow-limiting boss 6, and a sealing gasket 5 is provided below the flow-limiting boss 6.

[0005] Furthermore, a dynamic sealing ring 7 is provided above the flow-limiting protrusion 6, and the dynamic sealing ring 7 is located above the liquid outlet 15 when the valve is closed.

[0006] Furthermore, the valve body 1 is provided with a static sealing ring 9 at the top, which forms a seal with the optical axis 8.

[0007] Furthermore, the valve cover 10 is provided with a limiting hole 14, and the height of the limiting hole 14 is equal to the moving stroke of the flow limiting boss 6.

[0008] This utility model has the following advantages: First, it achieves flow control by adjusting the distance between the boss and the outlet, and has a three-seal structure to prevent leakage; second, it has a relatively simple structure and low production and manufacturing costs. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model.

[0010] In the diagram: 1. Valve body, 2. Needle valve core, 3. Limiting sealing boss, 4. Sealing step, 5. Sealing gasket, 6. Flow limiting boss, 7. Dynamic sealing ring, 8. Optical shaft, 9. Static sealing ring, 10. Valve cover, 11. Adjusting handle, 12. Locking screw, 13. Screw, 14. Limiting hole, 15. Liquid outlet, 16. Liquid inlet. Detailed Implementation

[0011] The technical solutions of the present utility model 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 utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0012] Please see Figure 1 This utility model provides a technical solution: including a valve body 1, a needle valve core 2, a valve cover 10, and an adjusting handle 11. The valve body 1 has an inlet 16 directly below it and an outlet 15 on one side above the inlet 16. The needle valve core 2 is located above the inlet 16 and can move up and down with the adjusting handle 11. The valve cover 10 is located above the valve body 1. The adjusting handle 11 and the needle valve core 2 are fixed together by a screw 13 and a locking screw 12.

[0013] The needle valve core 2 is provided with a limiting sealing boss 3, a flow limiting boss 6 and a light shaft 8. The valve body 1 is also provided with a hole that mates with it. The valve body 1 is provided with a sealing step 4 that mates with the flow limiting boss 6. A sealing gasket 5 is provided below the flow limiting boss 6 and a dynamic sealing ring 7 is provided above the flow limiting boss 6. When the valve is closed, the dynamic sealing ring 7 is located above the liquid outlet 15, forming a double seal to prevent leakage.

[0014] The top of the valve body 1 is provided with a static sealing ring 9, which forms a seal with the optical axis 8, thus forming a third seal.

[0015] The valve cover 10 is provided with a limiting hole 14, and the height of the limiting hole 14 is equal to the moving stroke of the flow limiting boss 6. When the valve is closed, the flow limiting boss 6 blocks the liquid outlet 15. The flow limiting boss 6 moves up and down with the adjusting handle 11. Adjusting the gap between the flow limiting boss 6 and the liquid outlet 15 can adjust the flow rate.

[0016] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A needle valve for easy flow regulation, comprising a valve body (1), a needle valve core (2), a valve cover (10), and an adjusting handle (11), wherein the valve body (1) has an inlet (16) directly below it and an outlet (15) above it; the needle valve core (2) is located above the inlet (16) and can move up and down with the adjusting handle (11); the valve cover (10) is located above the valve body (1); and the adjusting handle (11) and the needle valve core (2) are fixed together by a screw (13) and a locking screw (12), characterized in that: The needle valve core (2) is provided with a limiting sealing boss (3), a flow limiting boss (6) and an optical axis (8). The valve body (1) is also provided with a hole that matches it. The flow limiting boss (6) blocks the liquid outlet (15) when the valve is closed, and adjusts the flow rate by moving up and down with the adjusting handle (11).

2. The needle valve for easy flow adjustment according to claim 1, characterized in that: The valve body (1) is provided with a sealing step (4) that cooperates with the flow limiting boss (6), and a sealing gasket (5) is provided below the flow limiting boss (6).

3. The needle valve for easy flow adjustment according to claim 1, characterized in that: A dynamic sealing ring (7) is provided above the flow-limiting boss (6), and the dynamic sealing ring (7) is located above the liquid outlet (15) when the valve is closed.

4. The needle valve for easy flow adjustment according to claim 1, characterized in that: The valve body (1) is provided with a static sealing ring (9) at the top, and forms a seal with the optical axis (8).

5. A needle valve for easy flow adjustment according to claim 1, characterized in that: The valve cover (10) is provided with a limiting hole (14), and the height of the limiting hole (14) is equal to the travel of the flow limiting boss (6).

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