Pneumatic control one-way valve

Abstract

The utility model relates to the technical field of pneumatic control one-way valves, and discloses a pneumatic control one-way valve which comprises a valve deck, a valve element is fixedly connected to one side of the valve deck, a shaft check ring is fixedly connected to the inner side of the valve element, a first O-shaped ring is fixedly connected to one side of the valve element, a pneumatic piston is fixedly connected to one side of the first O-shaped ring, and a valve body is fixedly connected to the lower side of the pneumatic piston. After oil enters from the oil inlet, the valve core drives the air piston to move upwards under the action of oil pressure; along with the rise of oil pressure, under the action of oil pressure, the spring is compressed, the sealing mounting seat, the small screw and the self-made seal move downwards, the one-way valve is opened, and hydraulic oil flows to the outlet until the oil cylinder is filled with the hydraulic oil; when air pressure is larger than oil pressure and spring force borne by the sealing installation base, the small screw and the self-made sealing assembly, the sealing assembly moves downwards and is separated from the sealing ring, and hydraulic oil flows back to the oil tank from the oil cylinder.

Description

Technical Field

[0001] The utility model relates to the technical field of air-controlled one-way valves, in particular to an air-controlled one-way valve. Background Art

[0002] In the field of stamping automation, the hydraulic clamp of the mold has extremely high requirements for its holding capacity after clamping; the pneumatic one-way valve can ensure that the customer can still maintain the clamping capacity when the machine is shut down for a long time, the gas is cut off, the power is cut off, or the hydraulic pipeline leaks or is damaged.

[0003] The application number is CN202322725297.5, which discloses an air-controlled one-way valve, including an end closing cover, a piston top block, a liquid inlet channel and a supporting shell. The left end of the supporting shell is provided with a piston cavity, and the interior of the piston cavity is provided with a piston top block. Two sealing structures are provided between the outer side of the piston top block and the inner side of the piston cavity. The outer side of the left end of the supporting shell is provided with an end closing cover that closes the piston cavity, and a sealing structure is provided between the end closing cover and the outer side of the supporting shell. A liquid outlet hole is provided in the middle of the right side of the supporting shell, and the inner right end of the liquid outlet hole is a conical structure. The liquid outlet hole is communicated with the piston cavity, and a partition assembly is provided inside the liquid outlet hole. A slidingly connected push rod is provided in the middle of the partition assembly. The valve switch can be controlled by air pressure, and the valve is not easy to be damaged and has a long service life, which overcomes the situation that ordinary valves cannot be used due to spring damage, and is connected to the external air pressure. The valve can be opened only when the air pressure reaches the set value.

[0004] However, there are some shortcomings. Although the valve switch can be controlled by air pressure, the valve is not easy to be damaged and has a long service life, which overcomes the situation that ordinary valves cannot be used due to spring damage, and the valve can only be opened when the air pressure reaches the set value when it is connected to the external air pressure, the device is expensive and not convenient for mass production. Utility Model Content

[0005] The purpose of the utility model is to provide a pneumatically controlled one-way valve to solve the problem raised in the above-mentioned background technology that although the valve opening and closing can be controlled by air pressure, the valve is not easily damaged and has a long service life, thus overcoming the situation that ordinary valves cannot be used due to spring damage, and the valve can only be opened when the air pressure reaches a set value when connected to the external air pressure, the device has a high cost and is not convenient for mass production.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model is a pneumatically controlled one-way valve, comprising a valve cover, one side of the valve cover is fixedly connected to a valve core, the inner side of the valve core is fixedly connected to a shaft retaining ring, one side of the valve core is fixedly connected to a first O-ring, one side of the first O-ring is fixedly connected to an air piston, and the lower side of the air piston is fixedly connected to a valve body.

[0008] Furthermore, a combined seal is provided on one side of the valve body.

[0009] Furthermore, a sealing ring is fixedly connected to the lower side of the valve body, and a second O-ring is provided on the inner side of the sealing ring.

[0010] Furthermore, a hexagon socket flat-end set screw is fixedly connected to the lower side of the sealing ring, and a steel ball is fixedly connected to one side of the hexagon socket flat-end set screw.

[0011] Furthermore, a valve seat is fixedly connected to the lower side of the sealing ring, and a third O-ring is provided on one side of the valve seat.

[0012] Furthermore, a spring is fixedly connected to the upper side of the valve seat, and a sealing mounting seat is fixedly connected to one side of the spring.

[0013] Furthermore, one side of the sealing mounting seat is fixedly connected with a small screw.

[0014] Furthermore, a self-made seal is fixedly connected to one side of the small screw, and a fourth O-ring is fixedly connected to one side of the valve seat.

[0015] The utility model has the following beneficial effects:

[0016] (1) The utility model is provided with a configuration in which after oil is introduced into the oil inlet, the valve core drives the gas piston to move upward under the action of the oil pressure; as the oil pressure increases, under the action of the oil pressure, the spring is compressed, the seal mounting seat, the small screw, and the homemade seal move downward, the one-way valve opens, and the hydraulic oil flows to the outlet until the oil cylinder is filled. When the oil pressures of the one-way valve 2 composed of the seal mounting seat, the small screw, and the homemade seal are close to the same, the one-way valve moves upward under the action of the spring compression force until it fits tightly with the sealing ring, completing the closing and pressure-maintaining action. After the air inlet is introduced, as the air pressure increases, when the air pressure is greater than the oil pressure and spring force exerted on the seal mounting seat, the small screw, and the homemade seal assembly, the seal assembly moves downward and separates from the seal ring, and the hydraulic oil flows from the oil cylinder back to the oil tank.

[0017] (2) The utility model is equipped with an air-controlled one-way valve with a pressure resistance of 40MPa; the valve core responds quickly, and the opening air pressure is only 0.2MPa. When the oil pressure is 24.5MPa, the working pressure can be maintained for 30 days or more in the event of air or power failure in the power unit, burst or leakage of the external oil pipe, etc., to ensure that the oil cylinder continues to clamp the mold and there is no risk of the mold falling.

[0018] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the valve core connection of the utility model;

[0022] Figure 3 This is a schematic diagram of the sealing ring connection of the utility model;

[0023] Figure 4 This is a schematic diagram of the spring connection of the utility model;

[0024] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0025] In the figure: 1. Valve cover; 2. Valve core; 3. Shaft retaining ring; 4. First O-ring; 5. Air piston; 6. Valve body; 7. Combined seal; 8. Sealing ring; 9. Second O-ring; 10. Hexagon socket flat-end set screw; 11. Steel ball; 12. Valve seat; 13. Third O-ring; 14. Spring; 15. Seal mounting seat; 16. Small screw; 17. Homemade seal; 18. Fourth O-ring; DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-Figure 4 As shown, the utility model is a gas-controlled one-way valve, including a valve cover 1, a valve core 2 is fixedly connected to one side of the valve cover 1, a shaft retaining ring 3 is fixedly connected to the inner side of the valve core 2, a first O-ring 4 is fixedly connected to one side of the valve core 2, a gas piston 5 is fixedly connected to one side of the first O-ring 4, and a valve body 6 is fixedly connected to the lower side of the gas piston 5.

[0028] By adopting the above technical solution, in this solution, a combined seal 7 is provided on one side of the valve body 6 .

[0029] By adopting the above technical solution, in this solution, a sealing ring 8 is fixedly connected to the lower side of the valve body 6 , and a second O-ring 9 is provided on the inner side of the sealing ring 8 .

[0030] By adopting the above technical solution, in this solution, a hexagon socket flat-end set screw 10 is fixedly connected to the lower side of the sealing ring 8, and a steel ball 11 is fixedly connected to one side of the hexagon socket flat-end set screw 10.

[0031] By adopting the above technical solution, in this solution, the lower side of the sealing ring 8 is fixedly connected with the valve seat 12 , and a third O-ring 13 is provided on one side of the valve seat 12 .

[0032] By adopting the above technical solution, in this solution, a spring 14 is fixedly connected to the upper side of the valve seat 12 , and a sealing mounting seat 15 is fixedly connected to one side of the spring 14 .

[0033] By adopting the above technical solution, in this solution, a small screw 16 is fixedly connected to one side of the sealing mounting seat 15 .

[0034] By adopting the above technical solution, in this solution, a self-made seal 17 is fixedly connected to one side of a small screw 16 , and a fourth O-ring 18 is fixedly connected to one side of the valve seat 12 .

[0035] When in use, after the oil is admitted through the oil inlet, the valve core 2 drives the gas piston 5 to move upward under the action of the oil pressure; as the oil pressure increases, under the action of the oil pressure, the spring 14 is compressed, the sealing mounting seat 15, the small screw 16, and the homemade seal 17 move downward, the one-way valve opens, and the hydraulic oil flows to the outlet until the oil cylinder is filled. When the oil pressure measured by the one-way valve 2 composed of the sealing mounting seat 15, the small screw 16, and the homemade seal 17 is almost the same, the one-way valve moves upward under the action of the compression force of the spring 14 until it fits tightly with the sealing ring 8, completing the closing and pressure maintaining action. After the air inlet is admitted, as the air pressure increases, when the air pressure is greater than the oil pressure and the spring 14 force exerted on the sealing mounting seat 15, the small screw 16, and the homemade seal 17 assembly, the sealing assembly moves downward and separates from the sealing ring 8, and the hydraulic oil flows from the oil cylinder back to the oil tank. The utility model is provided with a pneumatically controlled one-way valve with a pressure resistance of 40MPa; the valve core 2 has a fast response speed, and the opening air pressure is only 0.2MPa. When the oil pressure is 24.5MPa, the working pressure can be maintained for 30 days or more in the event of air or power failure in the power unit, burst or leakage of the external oil pipe, etc., to ensure that the oil cylinder continuously clamps the mold without the risk of the mold falling.

[0036] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A pneumatically controlled one-way valve, comprising a valve cover (1), characterized in that: A valve core (2) is fixedly connected to one side of the valve cover (1), a shaft retaining ring (3) is fixedly connected to the inner side of the valve core (2), a first O-ring (4) is fixedly connected to one side of the valve core (2), a gas piston (5) is fixedly connected to one side of the first O-ring (4), and a valve body (6) is fixedly connected to the lower side of the gas piston (5).

2. The gas-controlled one-way valve according to claim 1, characterized in that: A combined seal (7) is provided on one side of the valve body (6).

3. The gas-controlled one-way valve according to claim 2, characterized in that: A sealing ring (8) is fixedly connected to the lower side of the valve body (6), and a second O-ring (9) is provided on the inner side of the sealing ring (8).

4. The gas-controlled one-way valve according to claim 3, characterized in that: A hexagon socket flat-end set screw (10) is fixedly connected to the lower side of the sealing ring (8), and a steel ball (11) is fixedly connected to one side of the hexagon socket flat-end set screw (10).

5. The gas-controlled one-way valve according to claim 4, characterized in that: The lower side of the sealing ring (8) is fixedly connected to a valve seat (12), and one side of the valve seat (12) is provided with a third O-ring (13).

6. The gas-controlled one-way valve according to claim 5, characterized in that: A spring (14) is fixedly connected to the upper side of the valve seat (12), and a sealing mounting seat (15) is fixedly connected to one side of the spring (14).

7. The gas-controlled one-way valve according to claim 6, characterized in that: One side of the sealing mounting seat (15) is fixedly connected with a small screw (16).

8. The gas-controlled one-way valve according to claim 7, characterized in that: A self-made seal (17) is fixedly connected to one side of the small screw (16), and a fourth O-ring (18) is fixedly connected to one side of the valve seat (12).

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