Throttle valve

Abstract

The throttle valve comprises a valve body shell, a valve rod is arranged at one end of the valve body shell in a screwed mode, a sealing ring is arranged in the middle of the valve rod, an air inlet connector is arranged at the other end of the valve body shell, a valve element matched with the valve rod to control air flow is arranged in the air inlet connector, and the outer end of the valve element is fixedly embedded in the inner wall of the air inlet connector. The inner end of the valve element is sleeved with a sealing piece sealed with the inner wall of the valve body shell, the end, located on the inner side of the valve body shell, of the valve rod is provided with taper, and flow adjustment is conducted through screwing-in and screwing-out. According to the utility model, the high-precision processing requirement is avoided; the valve core and the valve rod are matched for sealing, so that the processing is convenient; all accessories do not need high-precision machining, and high flatness is not needed; the rotatable adapter is adopted, so that the outlet can be conveniently swung in all directions; and the nut is arranged so that the position can be memorized and the state can be locked.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a device for controlling the flow of air or liquid. Background Art

[0002] The throttle valve adjusts the size of the airflow by changing the diameter of the fluid passing through. The existing conventional regulating valves include ball valves or flow regulating valves with the announcement number CN218063476U, which use the valve core 3 and set an eccentric slope on the side of the valve core 3 to adjust the cross section according to the rotation of the slope. All the above embodiments have high requirements on the flatness and precision of the workpiece, and the processing is difficult. In particular, the tool precision must be adjusted during the processing, and the production cost is too high. Utility Model Content

[0003] In order to solve the problem that the existing throttle valve has too high requirements for processing accuracy and surface flatness, the utility model provides a throttle valve that does not require too high precision after production and can also be produced by conventional processes such as injection molding and die casting. No high-precision CNC processing is required in the later stage.

[0004] The technical solution adopted by the utility model is: a throttle valve, including a valve body shell, a valve stem is screwed on one end of the valve body shell, a sealing ring is provided in the middle of the valve stem, an air inlet interface is provided at the other end of the valve body shell, a valve core is provided in the air inlet interface to cooperate with the valve stem to control the size of the air flow, the outer end of the valve core is embedded and fixed on the inner wall of the air inlet interface, the inner end extends into the valve body shell and is arranged concentrically with the valve stem, the inner end of the valve core is provided with a sealing member sealed with the inner wall of the valve body shell, and the valve stem is located at one end of the inner side of the valve body shell and has a taper, and the flow rate is adjusted by screwing in and out. The cross-sectional size adjustment is achieved by setting the valve core and the valve core (valve stem) to cooperate. The conical surface of the valve stem contacts the inner edge of the inner end of the valve core and wears the inner edge to achieve sealing. It avoids extremely high processing requirements. The sealing member is provided to seal the valve core and the inner wall of the valve body shell, which also eliminates the high-precision processing surface flatness requirements between the valve core and the valve body.

[0005] Further, as one of the preferred solutions of the throttle valve, an inner shoulder is provided on the inner edge of the air inlet interface, the outer end of the valve core is embedded in and fixed on the inner shoulder, and the outer end of the valve core extends inwardly to the inner end.

[0006] Further as one of the preferred solutions of the throttle valve, the sealing member includes a first ring fitted on the inner end side wall of the valve core, and a second ring connected to the inner end of the first ring and arranged obliquely and fitted on the inner wall of the valve body shell.

[0007] As one of the preferred solutions of the throttle valve, an opening is provided in the middle of the valve body shell, and sealing rings are provided on the valve body shell on both sides of the opening, and also includes an adapter sleeved on the sealing ring to receive the airflow at the opening, the adapter is rotatably fixed on the valve body shell, an air outlet is provided on the adapter, and the adapter and the valve body shell are sealed by the above-mentioned sealing ring. The air outlet of the adapter is a quick-connect interface.

[0008] As one of the preferred solutions of the throttle valve, a nut is fixed to the rear end of the valve stem, and an adjusting nut is screwed to the middle of the valve stem to mark or lock the position of the valve stem.

[0009] Further, as one of the preferred solutions for the throttle valve, the valve stem taper is divided into three sections, including a first taper, a second taper, and a third taper arranged in sequence from the head to the tail. The first taper is a guide taper to guide the direction of airflow, the second taper cooperates with the valve core to control the cross-sectional size, and the third taper cooperates with the inner edge of the valve core to achieve airflow cutoff.

[0010] The beneficial effects are: eliminating the need for high-precision processing; using the matching seal of the valve core and the valve stem, which is easy to process; all accessories do not require high-precision processing and high flatness; using a rotatable adapter to facilitate swinging the outlet in all directions; setting a nut can memorize the position and lock the state. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional diagram of the utility model.

[0012] Figure 2 It is a cross-sectional view of the utility model.

[0013] Figure 3 for Figure 2 Enlarged view of area A in the middle.

[0014] Among them: 1. valve body shell; 2. valve stem; 21. sealing ring; 11. air inlet interface; 3. valve core; 4. sealing; 12. inner shoulder, 41. first ring; 42. second ring; 13. opening; 5. adapter; 6. nut; 7. adjusting nut; 81. first taper; 82. second taper; 83. third taper. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical scheme and advantages of the scheme of the present application clearer, the technical scheme in the embodiment of the present application will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiment is a part of the embodiment of the present application, not all of the embodiments. The listing of all technical features in the dependent claims in a certain embodiment does not mean that this part is a necessary technical feature. This embodiment is for the purpose of simply and clearly describing the technical scheme. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. The utility model is further described below in conjunction with specific drawings.

[0016] like Figure 1 and Figure 2 As shown, a throttle valve comprises a valve body shell 1, a valve stem 2 is screwed on one end of the valve body shell 1, a sealing ring 21 is provided in the middle of the valve stem 2, an air inlet interface 11 is provided at the other end of the valve body shell 1, a valve core 3 is provided in the air inlet interface 11 to cooperate with the valve stem 2 to control the air flow, the outer end of the valve core 3 is embedded and fixed on the inner wall of the air inlet interface 11, the inner end extends into the valve body shell 1 and is arranged concentrically with the valve stem 2, a sealing member 4 is provided on the inner end of the valve core 3 to seal with the inner wall of the valve body shell 1, and the valve stem 2 is located at one end of the inner side of the valve body shell 1 and is provided with a taper, and the flow rate is adjusted by screwing in and out. The cross-sectional size adjustment is achieved by setting the valve core 3 to cooperate with the valve core (valve stem 2). The conical surface of the valve stem 2 contacts the inner edge of the inner end of the valve core 3 and wears the inner edge to achieve sealing. It avoids extremely high processing requirements. The sealing member 4 is provided to seal the valve core 3 and the inner wall of the valve body shell 1, which also eliminates the high-precision processing surface flatness requirements between the valve core 3 and the valve body.

[0017] In this embodiment, an inner shoulder is provided on the inner edge of the air inlet interface 11, and the outer end of the valve core 3 is embedded and fixed on the inner shoulder, and the outer end of the valve core 3 extends inward to the inner end. The valve core 3 is fixed by the inner shoulder, and the position of the valve core 3 and the valve body shell 1 is fixed.

[0018] In this embodiment, the sealing member 4 includes a first ring fitted on the inner end side wall of the valve core 3, and a second ring 42 connected to the inner end of the first ring and arranged obliquely and fitted on the inner wall of the valve body shell 1. The second ring 42 forms an angle with the first ring, and the second ring 42 can fit tightly with the inner wall of the valve body shell 1 under the action of air flow pressure.

[0019] In order to improve the scope of application, the air outlet interface is rotatably arranged in this embodiment. An opening 13 is arranged in the middle of the valve body shell 1, and sealing rings 21 are arranged on the valve body shell 1 on both sides of the opening 13. It also includes an adapter 5 which is sleeved on the sealing ring 21 to receive the airflow at the opening 13. The adapter 5 is rotatably fixed on the valve body shell 1, and an air outlet is arranged on the adapter 5. The adapter 5 and the valve body shell 1 are sealed by the above-mentioned sealing ring 21. The air outlet of the adapter 5 is a quick-connect interface.

[0020] In this embodiment, a nut 6 is fixed to the rear end of the valve stem 2, and an adjusting nut 7 is screwed on the middle of the valve stem 2. The position of the valve stem 2 is marked or locked by adjusting the nut 7. The position of the valve stem 2 can be limited by setting the nut and the position of the valve stem 2 can also be locked by the nut.

[0021] Embodiment 2, as Figure 3 As shown: This embodiment is a further improvement on the taper in the valve stem 2. The taper of the valve stem 2 is divided into three sections, including a first taper 81, a second taper 82, and a third taper 83 arranged in sequence from the head to the tail. The first taper 81 is a guide taper to guide the airflow direction, the second taper 82 cooperates with the valve core 3 to control the cross-sectional size, and the third taper 83 cooperates with the inner edge of the valve core 3 to realize airflow cutoff.

Claims

1. A throttle valve, comprising a valve body shell (1), a valve stem (2) being screwed onto one end of the valve body shell (1), a sealing ring (21) being disposed in the middle of the valve stem (2), an air inlet interface (11) being disposed at the other end of the valve body shell (1), a valve core (3) being disposed in the air inlet interface (11) for cooperating with the valve stem (2) to control the size of the air flow, characterized in that: The outer end of the valve core (3) is embedded and fixed in the inner wall of the air inlet interface (11), and the inner end extends into the valve body shell (1) and is arranged concentrically with the valve stem (2). The inner end of the valve core (3) is provided with a sealing member (4) that seals with the inner wall of the valve body shell (1). The valve stem (2) is provided with a taper at one end located on the inner side of the valve body shell (1), and flow rate is adjusted by rotating in and out.

2. The throttle valve according to claim 1, characterized in that: An inner shoulder is provided on the inner edge of the air inlet interface (11), the outer end of the valve core (3) is embedded in and fixed on the inner shoulder, and the outer end of the valve core (3) extends inwardly to the inner end.

3. The throttle valve according to claim 1, characterized in that: The sealing member (4) comprises a first ring which is arranged in close contact with the inner end side wall of the valve core (3), and a second ring (42) which is connected to the inner end of the first ring and is arranged in an inclined manner and in close contact with the inner wall of the valve body shell (1).

4. The throttle valve according to claim 1, characterized in that: The valve body shell (1) is provided with an opening (13) in the middle thereof, and sealing rings (21) are provided on the valve body shell (1) on both sides of the opening (13). The valve body shell (1) further comprises an adapter (5) which is sleeved on the sealing ring (21) and receives the airflow at the opening (13). The adapter (5) is rotatably fixed on the valve body shell (1), and an air outlet is provided on the adapter (5). The adapter (5) and the valve body shell (1) are sealed via the sealing ring (21).

5. The throttle valve according to claim 4, characterized in that: The air outlet of the adapter (5) is a quick-connect interface.

6. The throttle valve according to claim 1, characterized in that: A nut (6) is fixed to the rear end of the valve stem (2), and an adjusting nut (7) is screwed onto the middle of the valve stem (2), and the position of the valve stem (2) is marked or locked by the adjusting nut (7).

7. The throttle valve according to claim 1, characterized in that: The valve stem (2) has a taper of three sections, including a first taper (81), a second taper (82), and a third taper (83) arranged in sequence from the head to the tail. The first taper (81) is a guide taper for guiding the flow direction of the airflow, the second taper (82) cooperates with the valve core (3) to control the size of the cross section, and the third taper (83) cooperates with the inner edge of the valve core (3) to achieve airflow cutoff.

Images