Valve rod type gas flow regulating valve

Abstract

The invention discloses a valve rod type gas flow regulating valve which comprises a main body and further comprises a valve rod seat, the main body is in threaded connection with the valve rod seat, the main body is matched with the valve rod seat, and the outer wall of the valve rod seat is in threaded connection with a nut; the valve rod is arranged in the valve rod seat, the valve rod seat is in threaded connection with the valve rod, and the valve rod seat is matched with the valve rod; when the gas flow regulating valve is used, gas flow can be conveniently and accurately regulated, the gas flow regulating range is small, the system flow can be manually and accurately regulated, the gas flow regulating valve is simple in structure, low in cost and high in applicability, and the gas flow regulating valve is suitable for popularization and application. The flow coefficient linearly changes along with the turn number of the rotary knob, the flow adjusting stability is good, meanwhile, the gas flow adjusting valve has a locking function, and the situation that after the fixed flow is adjusted, the rotary knob is mistakenly moved, and consequently the flow changes is effectively avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of gas flow regulating valves, and in particular to a valve stem type gas flow regulating valve. Background Art

[0002] The stem-type gas flow valve is a device commonly used to control gas flow. Its working principle is to control the gas flow through the valve body by adjusting the valve opening. It is widely used in chemical, energy, medical and other fields. Gas flow control valves are often used in natural gas pipeline systems to ensure the efficient use of natural gas and be more energy-saving and environmentally friendly.

[0003] In a stem-type gas flow control valve, the flow coefficient is one of the most important parameters of the flow control valve. It indicates the flow control valve's ability to hinder the liquid. It is an inherent parameter of the flow control valve and does not change with changes in working conditions. During operation, the flow control valve actuator changes the valve stem opening to form a certain flow area between the valve stem and the air inlet channel, thereby obtaining the required flow coefficient and then obtaining a certain outlet flow. In other words, a valve stem structure corresponds to a fixed flow coefficient-opening relationship, and the higher the linearity of the valve stem's flow coefficient-opening, the higher the control system's adjustment accuracy for the outlet flow. However, the existing flow control valve has a large adjustment range, making it difficult to achieve micro-flow control, or use sensors for precise adjustment. Its structure is complex and the cost is high. To this end, we propose a stem-type gas flow control valve to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to propose a valve stem type gas flow control valve in order to solve the problems that the existing flow control valve has a large adjustment range or uses a sensor for precise adjustment, has a complex structure and is high in cost.

[0005] In order to achieve the above objectives, the present invention adopts the following technology: a stem-type gas flow regulating valve: It includes a mother body and a valve stem seat, wherein the mother body is threadedly connected to the valve stem seat, and the mother body and the valve stem seat are adapted to each other, and the outer wall of the valve stem seat is threadedly connected with a nut; A valve stem, wherein the valve stem is disposed inside a valve stem seat, the valve stem seat is threadedly connected to the valve stem, and the valve stem seat and the valve stem are adapted to each other; A knob is provided with a set screw and a locking screw on one side of the knob. The knob is fixedly connected to the valve stem through the set screw, and the locking screw is used to lock the position of the knob.

[0006] As a further description of a valve stem type gas flow regulating valve of the above technology: an air outlet is provided on one side of the mother body, and an air inlet is provided on the other side of the mother body.

[0007] As a further description of a valve stem type gas flow regulating valve of the above technology: an air intake channel is opened inside the mother body, and the air intake channel is connected to the air inlet.

[0008] As a further description of a valve stem type gas flow regulating valve of the above technology: a sealing ring is installed inside the mother body for sealing the connection between the mother body and the valve stem seat.

[0009] As a further description of a valve stem type gas flow regulating valve of the above technology: an O-ring adapted to the valve stem is provided on the bottom fixed sleeve of the outer wall of the valve stem.

[0010] As a further description of a valve stem type gas flow regulating valve of the above technology: the outer wall of the knob is provided with anti-slip grooves, and the valve stem seat and the knob are fixedly connected by a locking screw.

[0011] In summary, due to the use of the above-mentioned technology, the stem-type gas flow control valve of the present invention has the following beneficial effects: When in use, the present invention facilitates precise adjustment of the gas flow, and the gas flow adjustment range is small. The system flow can be manually and precisely adjusted. It has a simple structure, low cost, strong applicability, and a flow coefficient that changes linearly with the number of knob turns. The flow adjustment stability is good. At the same time, the gas flow regulating valve has a locking function to prevent gas leakage, has good sealing, prevents gas leakage, improves safety, and effectively avoids accidental operation of the knob after adjusting to a fixed flow, resulting in a change in flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It shows a schematic diagram of the overall cross-sectional structure provided by an embodiment of the present invention; Figure 2 It shows a schematic diagram of the overall structure provided by an embodiment of the present invention; Figure 3 It shows a schematic structural diagram of valve stem position 1 provided in an embodiment of the present invention; Figure 4 It shows a schematic structural diagram of valve stem position 2 provided in an embodiment of the present invention; Figure 5 A schematic diagram showing the linear variation of the flow coefficient with the number of knob turns according to an embodiment of the present invention is shown.

[0013] Figure numerals: 1. mother body; 2. valve stem seat; 3. valve stem; 4. nut; 5. O-ring; 6. set screw; 7. sealing ring; 8. knob; 9. locking screw; 10. air outlet; 11. air inlet; 12. air inlet channel. DETAILED DESCRIPTION

[0014] The following will provide a clear and complete description of a stem-type gas flow control valve according to the present invention, in conjunction with the accompanying drawings. Obviously, the described embodiments are only a portion of the present invention, not all of the embodiments. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0015] The present invention provides a stem type gas flow regulating valve, please refer to Figure 1-5 As shown, it includes a mother body 1 and a valve stem seat 2. The mother body 1 is threadedly connected to the valve stem seat 2, and the mother body 1 and the valve stem seat 2 are adapted to each other. The outer wall of the valve stem seat 2 is threadedly connected with a nut 4. The valve stem 3 is arranged inside the valve stem seat 2, the valve stem seat 2 is threadedly connected to the valve stem 3, and the valve stem seat 2 and the valve stem 3 are adapted to each other; Knob 8, a set screw 6 and a locking screw 9 are provided on one side of the knob 8. The knob 8 is fixedly connected to the valve stem 3 by the set screw 6, and the locking screw 9 is used to lock the position of the knob 8. When in use, the valve stem seat 2 and the knob 8 are locked by the locking screw 9, so that the position of the knob 8 is fixed, effectively preventing the knob 8 from being accidentally touched, which causes the position of the valve stem 3 in the air intake channel 12 to change, thereby causing the flow rate to change.

[0016] In the embodiment of the present application, when in use, the knob 8 is manually rotated so that the knob 8 drives the valve stem 3 to rotate. Since the valve stem 3 is threadedly connected to the valve stem seat 2, the valve stem seat 2 is fixed to the mother body 1. As the valve stem 3 rotates, the upper and lower positions of the valve stem 3 and the valve stem seat 2 change, as shown in the attached figure. Figure 3 and attached Figure 4 At the two positions shown, the gap between the valve stem 3 and the air inlet channel 12 opened in the mother body 1 changes, which in turn causes the flow area to change, thereby affecting the flow change, and then performing flow regulation. At the same time, since the diameter of the air inlet channel 12 is fixed, and the shape of the valve stem 3 is conical and the angle is fixed, when the valve stem 3 rises to the same height, the gap between the valve stem 3 and the air inlet channel 12 opened in the mother body 1 changes by the same amount. Since the valve stem 3 is threadedly connected to the valve stem seat 2, the height of the valve stem 3 rising or falling is fixed when the knob 8 is turned one circle. Therefore, the corresponding flow change is the same for each additional turn of the knob 8, that is, the flow coefficient changes linearly with the number of knob turns, as shown in the attached figure. Figure 5 As shown, when the knob 8 is adjusted to a certain position, the knob 8 can be locked to the valve stem seat 2 by the locking screw 9, and the knob 8 is locked, thereby effectively avoiding accidental operation of the knob 8, which causes the flow rate to change. It has a simple structure, convenient operation, a small flow adjustment range, and can manually and accurately adjust the system flow, with strong adaptability.

[0017] Furthermore, an air outlet 10 is provided on one side of the mother body 1, and an air inlet 11 is provided on the other side of the mother body 1. When in use, the air outlet 10 and the air inlet 11 are provided to facilitate the inflow and outflow of gas.

[0018] Furthermore, an air inlet channel 12 is provided inside the mother body 1 , and the air inlet channel 12 is communicated with the air inlet 11 . By changing the position of the valve stem 3 and the air inlet channel 12 , the flow rate can be flexibly changed.

[0019] Furthermore, a sealing ring 7 is installed inside the mother body 1 for sealing the connection between the mother body 1 and the valve stem seat 2. The sealing ring 7 is provided to effectively enhance the connection sealing between the mother body 1 and the valve stem seat 2.

[0020] Furthermore, an O-ring 5 adapted to the valve stem 3 is fixedly sleeved on the bottom of the outer wall of the valve stem 3 to improve the sealing performance during use.

[0021] Furthermore, the outer wall of the knob 8 is provided with anti-slip grooves, and the valve stem seat 2 and the knob 8 are fixedly connected by a locking screw 9. When in use, the anti-slip grooves on the outer wall of the knob 8 facilitate the rotation of the knob 8.

[0022] The working principle of the present invention is as follows: when in use, the knob 8 is manually rotated to drive the valve stem 3 to rotate. Since the valve stem 3 is threadedly connected to the valve stem seat 2, the valve stem seat 2 is fixed to the mother body 1. As the valve stem 3 rotates, the upper and lower positions of the valve stem 3 and the valve stem seat 2 change, as shown in the attached figure. Figure 3 and attached Figure 4 At the two positions shown, the gap between the valve stem 3 and the air inlet channel 12 opened in the mother body 1 changes, which in turn causes the flow area to change, thereby affecting the flow change, and then performing flow regulation. At the same time, since the diameter of the air inlet channel 12 is fixed, and the shape of the valve stem 3 is conical and the angle is fixed, when the valve stem 3 rises to the same height, the gap between the valve stem 3 and the air inlet channel 12 opened in the mother body 1 changes by the same amount. Since the valve stem 3 is threadedly connected to the valve stem seat 2, the height of the valve stem 3 rising or falling is fixed when the knob 8 is turned one circle. Therefore, the corresponding flow change is the same for each additional turn of the knob 8, that is, the flow coefficient changes linearly with the number of knob turns, as shown in the attached figure. Figure 5 As shown, when the knob 8 is adjusted to a certain position, the knob 8 can be locked to the valve stem seat 2 by the locking screw 9, thereby locking the knob 8, thereby effectively avoiding accidental operation of the knob 8, which may cause a change in flow.

[0023] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field of the present invention, within the technical scope disclosed by the present invention, can make equivalent replacements or changes to a stem-type gas flow control valve and its inventive concept according to the technology of the present invention, which should be covered by the scope of protection of the present invention.

Claims

1. A stem-type gas flow regulating valve, comprising a body (1), characterized in that: It also includes a valve stem seat (2), the mother body (1) and the valve stem seat (2) are threadedly connected, and the mother body (1) and the valve stem seat (2) are adapted to each other, and the outer wall of the valve stem seat (2) is threadedly connected with a nut (4); A valve stem (3), wherein the valve stem (3) is arranged inside the valve stem seat (2), the valve stem seat (2) and the valve stem (3) are threadedly connected, and the valve stem seat (2) and the valve stem (3) are adapted to each other; A knob (8) is provided with a set screw (6) and a locking screw (9) on one side of the knob (8), the knob (8) is fixedly connected to the valve stem (3) via the set screw (6), and the locking screw (9) is used to lock the position of the knob (8).

2. A stem-type gas flow regulating valve according to claim 1, characterized in that: An air outlet (10) is provided on one side of the mother body (1), and an air inlet (11) is provided on the other side of the mother body (1).

3. The stem-type gas flow regulating valve according to claim 1, characterized in that: An air intake channel (12) is provided inside the mother body (1), and the air intake channel (12) is connected to the air intake port (11).

4. The stem-type gas flow regulating valve according to claim 1, characterized in that: A sealing ring (7) is installed inside the mother body (1) for sealing the connection between the mother body (1) and the valve stem seat (2).

5. The stem-type gas flow regulating valve according to claim 1, characterized in that: The bottom fixed sleeve of the outer wall of the valve stem (3) is provided with an O-ring (5) that matches the valve stem (3).

6. The stem-type gas flow regulating valve according to claim 1, characterized in that: The outer wall of the knob (8) is provided with anti-slip grooves, and the valve stem seat (2) and the knob (8) are fixedly connected via a locking screw (9).

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