A needle valve that facilitates linear flow regulation

Abstract

This utility model relates to the field of gas valve technology and discloses a needle valve that facilitates linear flow regulation. It includes a valve body, a valve seat fixedly mounted on the valve body, and a valve stem movably inserted into the valve seat. The valve body has an inlet and an outlet at both ends. The inlet is connected to an inlet channel within the valve body, and the outlet is connected to an outlet channel within the valve body. The valve seat has a cavity that communicates with both the inlet and outlet channels. One end of the valve stem extends out of the valve seat, and the other end passes through the cavity and is inserted into the valve body. A needle-shaped adjusting post is provided at the end of the valve stem. An adjusting sealing cavity is provided within the valve body. The needle-shaped adjusting post is adapted to the adjusting sealing cavity. The outer circumferential surface of the needle-shaped adjusting post is conical. The needle-shaped adjusting post is inserted into the adjusting sealing cavity to seal the inlet and outlet channels.

Description

Technical Field

[0001] This utility model relates to the field of gas valve technology, and in particular to a needle valve that facilitates linear flow regulation. Background Technology

[0002] A needle valve is a type of fine-tuning valve with a needle-shaped valve plug, primarily used to regulate airflow. Fine-tuning valves require the valve opening to gradually increase, allowing for continuous and minute adjustments from closed to fully open. The needle-shaped valve plug achieves this function. The needle-shaped valve plug is typically made of a long, hardened steel needle, while the valve seat is made of soft materials such as tin or copper. The seal between the valve needle and the valve seat is achieved through a tight fit between their conical surfaces.

[0003] Traditional needle valve assemblies typically include a needle valve and a needle valve body with a valve port thrust structure that works with the needle valve to open and close the valve port. The needle valve body is equipped with only one needle valve, which, although it has a certain valve port opening adjustment function, cannot meet the more precise flow regulation requirements. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a needle valve that facilitates linear flow regulation, making it easy to linearly regulate the flow rate.

[0005] The technical solution of this utility model is as follows: a needle valve for easy linear flow regulation, comprising a valve body, a valve seat fixedly mounted on the valve body, and a valve stem movably inserted into the valve seat. The valve body has an inlet and an outlet at both ends. The inlet is connected to an inlet channel within the valve body, and the outlet is connected to an outlet channel within the valve body. The valve seat has a through cavity that communicates with both the inlet and outlet channels. One end of the valve stem extends out of the valve seat, and the other end passes through the through cavity and is inserted into the valve body. A needle-shaped adjusting post is provided at the end of the valve stem. An adjusting sealing cavity is provided within the valve body. The needle-shaped adjusting post is adapted to the adjusting sealing cavity. The outer circumferential surface of the needle-shaped adjusting post is conical. The needle-shaped adjusting post is inserted into the adjusting sealing cavity to seal the inlet and outlet channels.

[0006] As can be seen from the above scheme, the air inlet is used to realize air intake, the air outlet is used to realize gas exhaust, and the valve stem is movably inserted in the through cavity of the valve seat to control the gas flow. This utility model realizes the connection and closure of the air outlet channel and the air inlet channel through the feeding movement of the valve stem, thereby realizing the gas flow within the valve. The outer conical surface of the needle-shaped adjusting column facilitates the linear adjustment of the gas flow when the valve stem is manually fed back and forth.

[0007] The valve body is provided with a connector on the air inlet. Therefore, the connector is used to supply air from the air inlet into the valve body.

[0008] A nozzle is connected to the end of the gas outlet. Therefore, the nozzle is used to eject gas from the gas outlet.

[0009] The valve stem includes an adjusting rod and a gripping part. The gripping part has a limiting groove along its axis and an anti-slip groove at its end. Therefore, the limiting groove is used to connect the end of the valve stem to the rotating knob.

[0010] At least one set of limiting annular grooves is provided on the outer circumference of the adjusting rod, and a sealing ring is embedded in the limiting annular groove. The sealing ring is disposed between the valve seat and the adjusting rod. Therefore, the limiting annular grooves are used to install the sealing ring, thereby effectively preventing gas leakage.

[0011] The valve stem and the needle-shaped adjusting column are connected by a conical section, and the end of the passage cavity is provided with a conical cavity adapted to the conical section.

[0012] The taper of the outer circumference of the needle-shaped adjusting column is between 2° and 5°. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a cross-sectional view of the present invention;

[0015] Figure 3 This is a partial sectional view of the present invention;

[0016] Figure 4 This is a schematic diagram of the valve stem. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0018] like Figures 1 to 4As shown, this utility model is a needle valve for easy linear flow regulation, including a valve body 1, a valve seat 2 fixedly mounted on the valve body 1, and a valve stem 3 movably inserted into the valve seat 2. The valve body 1 has an air inlet 11 and an air outlet 12 at both ends. The air inlet 11 is connected to an air inlet channel 111 within the valve body 1, and the air outlet 12 is connected to an air outlet channel 121 within the valve body 1. The valve seat 2 has a through cavity 21, which is connected to both the air inlet channel 111 and the air outlet channel 121. The valve stem 3 is connected, with one end extending out of the valve seat 2 and the other end passing through the through cavity 21 and inserted into the valve body 1. A needle-shaped adjusting post 4 is provided at the end of the valve stem 3. An adjusting sealing cavity 6 is provided inside the valve body 1. The needle-shaped adjusting post 4 is adapted to the adjusting sealing cavity 6. The outer circumferential surface of the needle-shaped adjusting post 4 is conical, with a taper between 2° and 5°. The needle-shaped adjusting post 4 is inserted into the adjusting sealing cavity 6, thereby sealing the air inlet channel 111 and the air outlet channel 121. In this embodiment, the taper of the outer circumferential surface of the needle-shaped adjusting post 4 is 3°, and the taper of the conical portion 5 is greater than the taper of the needle-shaped adjusting post 4. The air inlet channel 111 and the air outlet channel 121 are inclined.

[0019] The valve body 1 is provided with a connector 8 on the air inlet 11. A nozzle 9 is connected to the end of the air outlet 12. In this embodiment, the connector 8 is provided with an air inlet hole, and the nozzle 9 is provided with an air outlet hole.

[0020] The valve stem 3 includes an adjusting rod 31 and a gripping portion 32. The gripping portion 32 has a limiting groove 321 along its axis and an anti-slip groove 322 at its end. The valve stem 3 and the needle-type adjusting column 4 are connected by a conical portion 5, and the end of the through cavity 21 has a conical cavity 7 adapted to the conical portion 5. In this embodiment, the diameter of the adjusting rod 31 is larger than the diameter of the needle-type adjusting column 4.

[0021] At least one set of limiting annular grooves 311 are provided on the outer circumference of the adjusting rod 31, and a sealing ring 10 is embedded in the limiting annular groove 311. The sealing ring 10 is disposed between the valve seat 2 and the adjusting rod 31. A fastening connector 13 is provided at the end of the valve seat 2 on the valve stem 3. In this embodiment, two sets of limiting annular grooves 311 are provided on the adjusting rod 31, and the fastening connector 13 is used to realize the connection between the valve seat 2 and the valve stem 3.

[0022] Finally, it should be emphasized that the above description is not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A needle valve facilitating linear flow regulation, comprising a valve body (1), a valve seat (2) fixedly arranged on the valve body (1), and a valve stem (3) movably arranged in the valve seat (2), characterized in that: The valve body (1) has an air inlet (11) and an air outlet (12) at both ends. The air inlet (11) is connected to an air inlet channel (111) inside the valve body (1), and the air outlet (12) is connected to an air outlet channel (121) inside the valve body (1). The valve seat (2) has a through cavity (21) inside, which is connected to the air inlet channel (111) and the air outlet channel (121) respectively. One end of the valve stem (3) extends out of the valve seat. 2) The other end passes through the through cavity (21) and is inserted into the valve body (1). The valve stem (3) is provided with a needle-shaped adjusting column (4). The valve body (1) is provided with an adjusting sealing cavity (6). The needle-shaped adjusting column (4) is adapted to the adjusting sealing cavity (6). The outer circumferential surface of the needle-shaped adjusting column (4) is set as a cone. The needle-shaped adjusting column (4) is inserted into the adjusting sealing cavity (6) to close the air inlet channel (111) and the air outlet channel (121).

2. The needle valve for easy linear flow regulation according to claim 1, characterized in that: The valve body (1) is provided with a connector (8) on the air inlet (11).

3. The needle valve for easy linear flow regulation according to claim 1, characterized in that: The air outlet (12) is connected to a nozzle (9) at its end.

4. The needle valve for easy linear flow regulation according to claim 1, characterized in that: The valve stem (3) includes an adjusting rod (31) and a gripping part (32). The gripping part (32) is provided with a limiting groove (321) along the axis and an anti-slip groove (322) is provided at the end of the gripping part (32).

5. A needle valve for easy linear flow regulation according to claim 4, characterized in that: At least one set of limiting ring grooves (311) are provided on the outer circumference of the adjusting rod (31), and a sealing ring (10) is embedded in the limiting ring groove (311). The sealing ring (10) is disposed between the valve seat (2) and the adjusting rod (31).

6. The needle valve for easy linear flow regulation according to claim 1, characterized in that: The valve stem (3) and the needle-type adjusting column (4) are connected by a conical part (5), and the end of the through cavity (21) is provided with a conical cavity (7) that is adapted to the conical part (5).

7. The needle valve for easy linear flow regulation according to claim 1, characterized in that: The taper of the outer circumference of the needle-shaped adjusting column (4) is between 2° and 5°.

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