One-way valve with air pressure auxiliary closing function

Abstract

The one-way valve with the air pressure auxiliary closing function comprises a valve body, the valve body is provided with an installation cavity, and the installation cavity is communicated with an air inlet hole and an air outlet hole which are formed in the two sides of the valve body through a main flow channel. A valve seat is arranged at the top of the mounting cavity, a valve element is arranged in the valve seat, the valve element is movably connected with the valve seat and controls the main flow channel to be opened and closed by moving up and down along the valve seat, and a reset spring is arranged at the bottom of the mounting cavity; an auxiliary flow channel is formed in the valve element, the top end of the auxiliary flow channel communicates with the main flow channel through an auxiliary hole, the bottom end of the auxiliary flow channel communicates with the mounting cavity below the valve element, and when the valve element moves upwards to close the main flow channel communicating with the air inlet hole and the air outlet hole, compressed air in the main flow channel enters the mounting cavity below through the auxiliary flow channel. The auxiliary hole is formed above the upper end face of the step of the valve element, compressed air is guided into the lower cavity at the bottom of the valve element and acts on the bottom of the valve element, the valve element generates upward pushing force, the upward pushing force and spring force are overlapped, and therefore the valve element is rapidly pushed, and an air path is closed.

Description

Technical Field

[0001] The utility model relates to the field of one-way valves, in particular to a one-way valve with an air pressure-assisted closing function. Background Art

[0002] A one-way valve used in gas lines allows gas flow in one direction only, while preventing it from flowing in the opposite direction. It primarily consists of a valve body, a valve seat, and a valve core. One end of the valve body connects to the gas input, while the other end connects to a pipeline or other component. The flow of gas is controlled by controlling the position of the valve core within the valve seat.

[0003] For example, the patent document with patent number 202123439476.X discloses an air circuit one-way valve, in which an air outlet nozzle, a spring seat, a spring, a vulcanized rubber valve assembly and an air inlet nozzle are installed in sequence in the valve body; the air outlet mounting part of the air outlet nozzle is embedded in the valve body, and the air inlet mounting part of the air inlet nozzle is embedded in the valve body; one side end face of the spring seat rests on the end face of the air outlet nozzle located in the valve body, and the spring seat is provided with an air flow channel and a center seat for sleeve mounting the spring; the support part of the vulcanized rubber valve assembly is nested in the air flow hole of the air inlet mounting part, one end of the spring is sleeved on the center seat of the spring seat, and the other end is sleeved on the vulcanized rubber valve assembly, and pre-compression force is applied to the vulcanized rubber valve assembly so that the vulcanized end face of the vulcanized rubber valve assembly is pressed onto the annular cutting edge of the air inlet mounting part.

[0004] The defect of the above technical solution is that when the valve core moves upward under the spring force of the return spring, the spring force needs to overcome the friction resistance of the sealing ring and the force of the compressed air on the upper end face of the valve core step at the same time. Therefore, the spring force requirement is relatively large, and the spring force is usually positively correlated with the volume of the return spring. However, the internal installation space of the existing one-way valve is limited, so the valve core closing effect is poor.

[0005] Therefore, it is necessary for us to improve such a structure to overcome the above-mentioned defects. Utility Model Content

[0006] The purpose of the utility model is to provide a one-way valve with an air pressure-assisted closing function to solve the problems existing in the prior art.

[0007] The above technical objectives of the present invention are achieved through the following technical solutions:

[0008] A one-way valve with an air pressure-assisted closing function comprises a valve body, wherein the valve body is provided with an installation cavity, and the installation cavity is connected to an air inlet and an air outlet provided on both sides of the valve body through a main flow channel;

[0009] A valve seat is provided at the top of the installation cavity, a valve core is provided in the valve seat, the valve core is movably connected to the valve seat, and controls the on-off of the main flow channel by moving up and down along the valve seat, and a return spring is provided at the bottom of the installation cavity;

[0010] An auxiliary flow channel is provided inside the valve core, the top end of the auxiliary flow channel is connected to the main flow channel through the process hole, and the bottom end of the auxiliary flow channel is connected to the installation cavity below the valve core. When the valve core moves upward to close the main flow channel connecting the air inlet and the air outlet, the compressed air in the main flow channel enters the installation cavity below through the auxiliary flow channel.

[0011] Furthermore, the valve seat is provided with an axial through hole, and the valve core can move up and down along the through hole of the valve seat. The through hole has a limit step, which is the limit position for the upward movement of the valve core, and the bottom of the installation cavity is the limit position for the downward movement of the valve core.

[0012] Furthermore, when the valve core moves downward along the valve seat to switch the main channel to a conducting state, an upper cavity is formed at the limiting step of the valve seat and the valve core, and the main channel is connected to the air outlet through the upper cavity.

[0013] Furthermore, when the valve core moves upward along the valve seat to switch the main channel to a closed state, the valve core and the bottom of the installation cavity form a lower cavity, and the main channel is connected to the lower cavity through the process hole and the auxiliary channel in sequence.

[0014] Furthermore, a vent hole for connecting the valve body and the valve core connection surface is provided on the side of the valve body.

[0015] Furthermore, the contact surfaces of the valve body, valve seat and valve core are provided with sealing rings.

[0016] In summary, the present invention has the following beneficial effects:

[0017] By setting a process hole above the upper end face of the valve core step, compressed air is guided into the lower cavity at the bottom of the valve core, so that it acts on the bottom of the valve core, causing the valve core to generate an upward thrust, which is superimposed with the spring force, thereby quickly pushing the valve core and closing the air path. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the one-way valve with air pressure assisted closing function described in the present invention.

[0019] Figure 2 This utility model Figure 1 The AA cross-sectional view of the one-way valve is shown.

[0020] Figure 3 It is a schematic diagram of the conduction state of the one-way valve of the present invention.

[0021] Figure 4It is a schematic diagram of the closed state of the one-way valve of the present invention. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below with reference to illustrations and specific embodiments.

[0023] like Figures 1 to 4 As shown, the one-way valve with air pressure assisted closing function proposed by the present invention includes a valve body 1, wherein the valve body 1 is provided with a mounting cavity 11, and the mounting cavity 11 is connected to an air inlet 13 and an air outlet 14 provided on both sides of the valve body 1 through a main flow channel 12;

[0024] A valve seat 2 is provided at the top of the installation cavity 11, and a valve core 3 is provided in the valve seat 2. The valve core 3 is movably connected to the valve seat 2 and controls the opening and closing of the main flow channel 12 by moving up and down along the valve seat 2. A return spring 4 is provided at the bottom of the installation cavity 11;

[0025] An auxiliary flow channel 31 is provided inside the valve core 3. The top end of the auxiliary flow channel 31 is connected to the main flow channel 12 through the process hole 32, and the bottom end of the auxiliary flow channel 31 is connected to the installation cavity 11 below the valve core 3. When the valve core 3 moves upward to close the main flow channel connecting the air inlet hole 13 and the air outlet hole 14, the compressed air in the main flow channel 12 enters the installation cavity 11 below through the auxiliary flow channel 31.

[0026] The valve seat 2 is provided with an axial through hole, and the valve core 3 can move up and down along the through hole of the valve seat 2. The through hole has a limit step 33, and the limit step 33 is the limit position for the upward movement of the valve core 3. The bottom of the installation cavity 11 is the limit position for the downward movement of the valve core 3.

[0027] When the valve core 3 moves downward along the valve seat 2 to switch the main channel 12 to a conducting state, an upper cavity 15 is formed at the limiting step 33 of the valve seat 2 and the valve core 3, and the main channel 12 is connected to the air outlet 14 through the upper cavity 15.

[0028] When the valve core 3 moves upward along the valve seat 2 to switch the main channel 12 to a closed state, the valve core 3 and the bottom of the installation cavity 11 form a lower cavity 16, and the main channel 12 is connected to the lower cavity 16 through the process hole 32 and the auxiliary channel 31 in sequence.

[0029] The side surface of the valve body 1 is provided with an air leakage hole 17 for communicating with the connecting surface of the valve body 1 and the valve core 3.

[0030] The contact surfaces of the valve body 1 , the valve seat 2 and the valve core 3 are provided with a sealing ring 5 .

[0031] The principle of this utility model is as follows:

[0032] The two ends of the valve body 1 are connected to the pipeline through the air inlet 13 and the air outlet 14 respectively. A valve seat 2 and a valve core 3 are provided inside the valve body 1, and the main channel 12 is switched on and off by controlling the position of the valve core 3 in the valve seat 2.

[0033] When the valve core 3 moves downward along the valve seat 2 to switch the main channel 12 to the conducting state, an upper cavity 15 is formed at the limiting step 33 of the valve seat 2 and the valve core 3. After the compressed gas enters the main channel 12 through the air inlet 13, it flows through the upper cavity 15 connected to the main channel 12 and flows out through the air outlet 14.

[0034] When the main channel 12 needs to be switched to the closed state, the return spring 4 pushes the valve core 3 upward. During the upward movement of the valve core 3, the volume of the upper cavity 15 gradually decreases until the air inlet 13 and the air outlet 14 are no longer connected. At the same time, the volume of the lower cavity 16 gradually increases, and the process hole 32 is connected to the main channel 12. The compressed air in the main channel 12 flows through the process hole 32 and the auxiliary channel 31 in sequence and enters the lower cavity 16, causing it to act on the bottom of the valve core 3, generating an upward thrust that is superimposed on the spring force of the return spring 4, quickly pushing the valve core 3 to close.

[0035] In this document, the directions or positional relationships indicated by terms such as "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "vertical", and "horizontal" are based on the directions or positional relationships shown in the accompanying drawings and are only for the clarity of the technical solution and the convenience of description. Therefore, they should not be understood as limitations on the present invention.

[0036] As used herein, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion of elements other than the listed elements and may also include additional elements not specifically listed.

[0037] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements are possible without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A one-way valve with air pressure assisted closing function, characterized in that: The valve body (1) comprises a valve body (1), wherein the valve body (1) is provided with a mounting cavity (11), and the mounting cavity (11) is communicated with an air inlet (13) and an air outlet (14) provided on both sides of the valve body (1) through a main flow channel (12); A valve seat (2) is provided at the top of the installation cavity (11), a valve core (3) is provided in the valve seat (2), the valve core (3) is movably connected to the valve seat (2), and controls the opening and closing of the main flow channel (12) by moving up and down along the valve seat (2), and a return spring (4) is provided at the bottom of the installation cavity (11); An auxiliary flow channel (31) is provided inside the valve core (3), the top end of the auxiliary flow channel (31) is connected to the main flow channel (12) through a process hole (32), and the bottom end of the auxiliary flow channel (31) is connected to the installation cavity (11) below the valve core (3). When the valve core (3) moves upward to close the main flow channel connecting the air inlet hole (13) and the air outlet hole (14), the compressed air in the main flow channel (12) enters the installation cavity (11) below through the auxiliary flow channel (31).

2. The one-way valve with air pressure assisted closing function according to claim 1, characterized in that: The valve seat (2) is provided with an axially penetrating through hole, and the valve core (3) can move up and down along the through hole of the valve seat (2). The through hole has a limiting step (33), and the limiting step (33) is the limit position for the upward movement of the valve core (3). The bottom of the installation cavity (11) is the limit position for the downward movement of the valve core (3).

3. The one-way valve with air pressure assisted closing function according to claim 2, characterized in that: When the valve core (3) moves downward along the valve seat (2) to switch the main flow channel (12) to a conducting state, an upper cavity (15) is formed at the limiting step (33) of the valve seat (2) and the valve core (3), and the main flow channel (12) is communicated with the air outlet (14) through the upper cavity (15).

4. The one-way valve with air pressure assisted closing function according to claim 2, characterized in that: When the valve core (3) moves upward along the valve seat (2) to switch the main flow channel (12) to a closed state, the valve core (3) and the bottom of the installation cavity (11) form a lower cavity (16), and the main flow channel (12) is connected to the lower cavity (16) through the process hole (32) and the auxiliary flow channel (31) in sequence.

5. The one-way valve with air pressure assisted closing function according to claim 1, characterized in that: The side surface of the valve body (1) is provided with an air leakage hole (17) for communicating with the connecting surface of the valve body (1) and the valve core (3).

6. The one-way valve with air pressure assisted closing function according to claim 1, characterized in that: The contact surfaces of the valve body (1), the valve seat (2) and the valve core (3) are provided with a sealing ring (5).

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