Needle valve capable of adjusting flow

Abstract

The utility model relates to the technical field of valves, in particular to a needle valve capable of adjusting flow, which comprises a lower valve body and an upper valve body fixed above the lower valve body, liquid inlets are uniformly distributed at the bottom of the needle valve, liquid outlets are uniformly distributed on the side surface above the needle valve, and a plunger capable of adjusting up and down is arranged in the center of the needle valve; the upper portion of the needle valve is connected with an adjusting valve rod through a bolt, an inner valve rod coaxial with the adjusting valve rod is arranged above the plunger, and flow adjustment is achieved by adjusting the inner valve rod. The utility model has the advantages that: 1, sealing opening or automatic flow regulation according to requirements can be realized, and two control methods can be selected; 2, the sealing performance is better, and the operation is simple; and thirdly, the structure is simple and the manufacturing cost is low.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a needle valve with adjustable flow rate. Background Technology

[0002] A needle valve is a precisely adjustable valve and an important component of instrumentation and measurement piping systems. It has a wide range of applications, primarily including gate valves and ball valves, and its function is to open or close pipeline passages. The valve core of a needle valve is a very sharp cone, inserted into the valve seat like a needle, hence its name. Needle valves can withstand higher pressures than other types of valves, so they are generally used for sealing gas or liquid media with relatively low flow rates and high pressures. In oilfield production, needle valves are often used in conjunction with pressure gauges in wellheads, processes, measurement rooms, pressure circuits, and pipeline passages requiring effective switching or precise control. However, current needle valves can only adjust the valve core to achieve sealing and opening, but cannot regulate the flow rate.

[0003] Therefore, this utility model provides an adjustable flow needle valve, which can adjust and control the flow rate. Utility Model Content

[0004] The purpose of this invention is to provide an adjustable flow needle valve to solve the problems existing in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an adjustable flow needle valve, comprising a lower valve body 1 and an upper valve body 8 fixed above it, wherein a needle valve 3 is disposed at the center of the lower valve body 1, characterized in that: the bottom of the needle valve 3 is provided with an evenly distributed inlet port 13, the upper side is provided with an evenly distributed outlet port 4, and the center is provided with an adjustable plunger 2; the needle valve 3 is connected to an adjusting valve rod 5 by bolts, and an inner valve rod 6 coaxial with the adjusting valve rod 5 is disposed above the plunger 2.

[0006] Furthermore, the top of the regulating valve stem 5 is fixedly connected to the regulating handle 9, and a central hole 10 is provided in the center to cooperate with the inner valve stem 6.

[0007] Furthermore, packing 7 is provided in the middle part of the central hole 10 and the lower part of the upper valve body 8.

[0008] Furthermore, the top of the central hole 10 and the inner valve stem 6 are both provided with threads 12.

[0009] Furthermore, the top of the inner valve stem 6 is provided with an adjustment port 11 for easy adjustment.

[0010] Furthermore, the liquid outlet holes 4 are uniformly layered, with more than 2 layers, and the distance between adjacent liquid outlet holes 4 is the same as the thickness of the plunger 2.

[0011] Compared with the prior art, the advantages of this utility model are: first, it can realize sealed opening or automatic flow adjustment according to needs, with two control methods to choose from; second, it has better sealing performance and is simple to operate; and third, it has a simple structure and low manufacturing cost. Attached Figure Description

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

[0013] Figure 2 for Figure 1 A magnified view of part A in the image.

[0014] In the diagram: 1. Lower valve body; 2. Plunger; 3. Needle valve; 4. Liquid outlet; 5. Adjusting valve stem; 6. Inner valve stem; 7. Packing; 8. Upper valve body; 9. Adjusting handle; 10. Center hole; 11. Adjusting port; 12. Thread; 13. Liquid inlet. Detailed Implementation

[0015] 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.

[0016] Please see Figure 1-2 This utility model provides a technical solution: an adjustable flow needle valve, including a lower valve body 1 and an upper valve body 8 fixed above it, with a needle valve 3 disposed at the center of the lower valve body 1.

[0017] The needle valve 3 has a groove in its center, and evenly spaced liquid inlets 13 are provided between the bottom and the groove. At the same time, evenly spaced liquid outlets 4 are provided on the upper side of the groove. The liquid outlets 4 are evenly layered, with more than two layers, and the distance between adjacent layers of liquid outlets 4 is the same as the thickness of the plunger 2. An adjustable plunger 2 is provided inside the groove. The needle valve 3 is connected to an adjusting valve rod 5 via bolts. The adjusting valve rod 5 passes through the upper valve body 8, and there is a matching adjusting thread between them. For easy adjustment, the top of the adjusting valve rod 5 is fixedly connected to the adjusting handle 9, and the center of the adjusting valve rod 5 has a central hole 10.

[0018] To regulate the flow rate, an inner valve stem 6 is provided above the plunger 2, coaxial with the center hole 10 of the regulating valve stem 5. Both the top of the center hole 10 and the inner valve stem 6 are provided with threads 12. At the same time, the top of the inner valve stem 6 is provided with an adjustment port 11 for easy adjustment. In this way, the inner valve stem 6 can be controlled to move up and down in the center hole 10 through the adjustment port 11, so that the plunger 2 can move up and down, thereby sealing the liquid inlet 13 or allowing liquid to be discharged through one or more layers of liquid outlet holes 4, thus controlling and regulating the flow rate.

[0019] To improve sealing performance, packing 7 is provided in the middle part of the central hole 10 and the lower part of the upper valve body 8.

[0020] 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. An adjustable flow needle valve comprising a lower valve body (1) and an upper valve body (8) fixed thereon, a needle valve (3) is arranged in the center of the lower valve body (1), characterized in that: The bottom of the needle valve (3) is provided with equally divided liquid inlet (13), the upper side is provided with equally divided liquid outlet hole (4), the center is provided with adjustable plunger (2); the upper side of the needle valve (3) is connected with the adjusting valve stem (5) through bolt, the upper side of the plunger (2) is provided with the inner valve stem (6) coaxial with the adjusting valve stem (5).

2. A flow-regulated needle valve according to claim 1, characterized in that: The top of the adjusting valve stem (5) is fixedly connected with the adjusting handle (9), and the center is provided with the center hole (10) matched with the inner valve stem (6).

3. A flow-regulated needle valve according to claim 2, wherein: The middle part of the center hole (10) and the lower part of the upper valve body (8) are both provided with packing (7).

4. A flow-regulated needle valve according to claim 2, wherein: The top of the center hole (10) and the inner valve stem (6) are both provided with thread (12).

5. A flow-regulated needle valve according to claim 4, wherein: The top of the inner valve stem (6) is provided with the adjusting port (11) for easy adjustment.

6. A flow-regulated needle valve according to claim 1, wherein: The liquid outlet hole (4) is evenly layered, the number of layers is greater than 2, and the distance between the adjacent layers of liquid outlet hole (4) is the same as the thickness of the plunger (2).

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