Self-sealing one-way valve for large-flow mold temperature zero cooling system and control method of self-sealing one-way valve

Abstract

The self-sealing one-way valve comprises an outer shell, a one-way valve element, a guide column and a reset spring, the one-way valve element is arranged in the outer shell, a sliding connection hole is formed in the center of the one-way valve element, and the guide column is installed in the sliding connection hole in a sliding mode; the side, away from the water inlet end of the one-way connecting cavity, of the guide column is provided with an external thread, the guide column is provided with a limiting piece connected with the external thread of the guide column in a matched mode, a guide block is arranged on the outer ring face of the limiting piece, and a guide groove in sliding fit with the guide block is formed in the outer shell. The guide column between the limiting piece and the one-way valve element is sleeved with a reset spring, the guide column penetrates through the limiting piece and then extends to the outside of the outer shell, a screwing part is arranged at the end, at the extending position of the guide column, of the outer shell, and the relative distance between the limiting piece and the one-way valve element is adjusted by screwing the screwing part. The elasticity of the spring is adjustable, and the sealing strength of the valve element is adjustable.

Description

Technical Field

[0001] This invention relates to the field of check valves, and particularly to a self-sealing check valve and its control method for a high-flow-rate zero-temperature cooling system. Background Technology

[0002] Mold temperature controllers are devices used for controlling the temperature of molds. Their circulation structure requires the use of check valves. Existing check valves are devices that prevent liquid backflow by detecting and controlling backflow. Existing check valves can only achieve backflow prevention control. There is a type of check valve that uses a spring to control the tightness of the valve core's closure. If the valve core is closed too tightly, the pumped liquid will not be able to open the valve core. If the valve core is closed too loosely, some liquid will flow back, and a complete seal cannot be achieved. Summary of the Invention

[0003] The main objective of this invention is to provide a self-sealing check valve and its control method for a high-flow-rate mold temperature zero-cooling system, which solves the problem of adjustable spring tension.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] A self-sealing check valve for a high-flow-rate mold temperature zero-cooling system includes an outer shell, a check valve core, a guide post, and a return spring. The outer shell is L-shaped and has a one-way connecting cavity inside. The one-way valve core is movably connected to the water inlet end of the one-way connecting cavity. A sliding connecting hole is provided at the center of the one-way valve core, and a guide post is slidably installed in the sliding connecting hole. The guide post has an external thread on the side away from the water inlet end of the one-way connecting cavity. The guide post has a limiting member that mates with the external thread of the guide post. A guide block is provided on the outer ring surface of the limiting member. A guide groove that slidably mates with the guide block is opened inside the outer shell. A return spring is fitted on the guide post between the limiting member and the check valve core. The guide post extends beyond the limiting member to the outside of the outer shell, and a turning part is provided at one end of the outer shell where the guide post extends. The relative distance between the limiting member and the check valve core is adjusted by turning the turning part.

[0006] Furthermore, the outer shell includes a first shell, a second shell, and a third shell. The two ends of the second shell are fixedly connected to the first shell and the third shell, respectively. The connection end between the second shell and the first shell has a one-way connection cavity inside. The inner circumferential surface of the other end of the first shell is provided with a quick-connect fitting. The third shell is an L-shaped shell and is also provided with a rotary connection hole. A rotary seal is fitted on the guide post and is connected to the rotary connection hole through the rotary seal.

[0007] Furthermore, the connection between the one-way connecting cavity and the one-way valve core is provided with a first inclined surface, and the one-way valve core is also provided with a second inclined surface that matches the first inclined surface. The maximum diameter of the second inclined surface is smaller than the maximum diameter of the first inclined surface.

[0008] Furthermore, the limiting member is plate-shaped, and has evenly distributed drainage holes. The number of limiting blocks on the outer ring surface of the limiting member is not less than two.

[0009] Furthermore, when the limiting member and the one-way valve core are at their maximum distance, the return spring is still in a compressed state.

[0010] Furthermore, the gap between the outer ring surface of the one-way valve core and the inner wall of the outer shell varies depending on the valve core's stroke. The gap is largest when the valve core moves to its maximum stroke, and smallest when it moves to its minimum stroke.

[0011] Furthermore, a control method for a self-sealing check valve in a high-flow-rate mold temperature zero-cooling system includes the following steps: S1, during operation, the check valve core and the inlet are initially in a closed state, and the limiting component keeps the return spring within its shortest stroke, i.e., the pressure of the return spring on the check valve core is at its maximum value in the closed state; S2, a flow and pressure monitoring device is installed at the inlet end of the check valve. When insufficient flow and pressure are detected, the guide column is turned by an external power device, causing the limiting component to move away from the check valve core, thereby reducing the pressure of the return spring on the check valve core and achieving a stable water intake effect;

[0012] S3. When the water intake stops, turn the guide column in the opposite direction to restore the position of the limiting component and prevent backflow.

[0013] Furthermore, in one application, the method can be used to achieve real-time control of the water flow rate and its stability via a one-way valve.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] This invention adjusts the position of the limiting component to make the pressure of the spring squeezing the valve core of the one-way valve adjustable, and further makes the tightness of the valve core closure adjustable. This allows for normal water intake when the inlet pressure is different, especially when the pressure is insufficient, by reducing the spring squeezing force. After water intake is completed, the limiting component is restored to its original position, thereby restoring the valve core closure force and preventing backflow and leakage.

[0016] This structure allows for the regulation of flow rate by adjusting the closing force of the check valve core, based on the flow rate data detected at both ends of the check valve. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0018] Figure 2 This is a schematic cross-sectional view of the present invention;

[0019] Figure 3 This is a partial cross-sectional schematic diagram of the present invention.

[0020] Reference numerals: 1. Outer shell; 2. One-way valve core; 3. Guide post; 4. Return spring; 5. One-way connecting cavity; 6. Limiting component; 7. Guide block; 8. Guide groove; 9. Tightening part; 10. First housing; 11. Second housing; 13. Third housing; 14. Quick-connect component; 15. First inclined surface; 16. Second inclined surface. Detailed Implementation

[0021] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention. See also Figure 1-3 As shown, a self-sealing check valve for a high-flow-rate mold temperature zero-cooling system includes an outer shell, a check valve core, a guide post, and a return spring. The outer shell is L-shaped and has a one-way connecting cavity inside. The one-way valve core is movably connected to the water inlet end of the one-way connecting cavity. A sliding connecting hole is provided at the center of the check valve core, and a guide post is slidably installed in the sliding connecting hole. The guide post has an external thread on the side away from the water inlet end of the one-way connecting cavity. The guide post has a limiting member that mates with the external thread of the guide post. A guide block is provided on the outer ring surface of the limiting member. A guide groove that slidably mates with the guide block is opened inside the outer shell. A return spring is fitted on the guide post between the limiting member and the check valve core. The guide post extends to the outside of the outer shell after passing through the limiting member, and a turning part is provided at one end of the outer shell where the guide post extends. The relative distance between the limiting member and the check valve core is adjusted by turning the turning part.

[0022] The outer shell includes a first shell, a second shell, and a third shell. The two ends of the second shell are fixedly connected to the first shell and the third shell, respectively. The connection end between the second shell and the first shell has a one-way connection cavity inside. The other end of the first shell has a quick-connect fitting on its inner ring surface. The third shell is an L-shaped shell and also has a rotary connection hole. A rotary seal is fitted on the guide post and is connected to the rotary connection hole through the rotary seal.

[0023] The one-way connecting cavity is provided with a first inclined surface at the connection between it and the one-way valve core. The one-way valve core is also provided with a second inclined surface that matches the first inclined surface. The maximum diameter of the second inclined surface is smaller than the maximum diameter of the first inclined surface.

[0024] The limiting member is plate-shaped, and has evenly distributed drainage holes. The number of limiting blocks on the outer ring surface of the limiting member is not less than two.

[0025] When the limiting component and the one-way valve core are at their maximum distance, the return spring remains compressed. The gap between the outer ring surface of the one-way valve core and the inner wall of the outer casing varies depending on the valve core's stroke; the gap is largest when the valve core reaches its maximum stroke, and smallest when it reaches its minimum stroke.

[0026] During operation, monitoring sensors are installed at both the inlet and outlet ends of the check valve. These sensors monitor the flow rate at the inlet and outlet ends. By adjusting the distance between the limiting component and the check valve core, the closing force of the check valve core is adjusted. Real-time adjustments are made based on real-time flow data. A rotating device, such as a motor, drives the guide column to rotate, thereby adjusting the position of the limiting component. This maintains a stable flow rate at the outlet end of the check valve, resulting in better product processing.

[0027] A control method for a self-sealing check valve in a high-flow-rate mold temperature zero-cooling system includes the following steps:

[0028] S1. During operation, the check valve core and inlet are initially in a closed state, and the limiting component keeps the return spring within its shortest stroke, i.e., the pressure of the return spring on the check valve core is at its maximum value in the closed state; S2. A flow and pressure monitoring device is installed at the inlet end of the check valve. When insufficient flow and pressure are detected, the guide column is turned by an external power device, causing the limiting component to move away from the check valve core, thereby reducing the pressure of the return spring on the check valve core and achieving a stable water intake effect;

[0029] S3. When the water intake stops, turn the guide column in the opposite direction to restore the position of the limiting component and prevent backflow.

[0030] The above description is only a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. Any equivalent modifications or changes made by those skilled in the art based on the content disclosed in the present invention should be included within the scope of protection set forth in the claims.

Claims

1. A self-sealing check valve for a large-flow mold temperature zero cooling system, comprising an outer shell (1), a check valve spool (2), a guide column (3) and a return spring (4), the outer shell (1) is L-shaped, the inner part of the outer shell (1) is provided with a one-way connecting cavity (5), the water inlet end of the one-way connecting cavity (5) is movably connected with the check valve spool (2), the center of the check valve spool (2) is provided with a sliding connection hole, the guide column (3) is slidably installed in the sliding connection hole, the side of the guide column (3) away from the water inlet end of the one-way connecting cavity (5) is provided with external threads, the guide column (3) is provided with a limiting piece (6) connected with the external threads of the guide column (3), the outer ring surface of the limiting piece (6) is provided with a guide block (7), the inner part of the outer shell (1) is provided with a guide groove (8) slidably connected with the guide block (7), the return spring (4) is sleeved on the guide block (7) between the limiting piece (6) and the check valve spool (2), the guide column (3) extends to the outside of the outer shell (1) after passing through the limiting piece (6), and one end of the outer shell (1) where the guide column (3) extends is provided with a rotating part (9), and the relative distance between the limiting piece (6) and the check valve spool (2) is adjusted by rotating the rotating part (9).

2. The self-sealing check valve for a large flow mold temperature zero cooling system of claim 1, wherein: The outer shell (1) comprises a first shell (10), a second shell (11) and a third shell (13), the two ends of the second shell (11) are fixedly connected with the first shell (10) and the third shell (13) respectively, the inner part of the connecting end of the second shell (11) and the first shell (10) is a one-way connecting cavity (5), the other end of the first shell (10) is provided with a quick connecting piece (14), the third shell (13) is an L-shaped shell, and the third shell (13) is further provided with a rotating connection hole, the guide column (3) is sleeved with a rotating sealing piece and connected with the rotating connection hole through the rotating sealing piece.

3. The self-sealing check valve for a large flow mold temperature zero cooling system of claim 2, wherein: The connecting part between the one-way connecting cavity (5) and the check valve spool (2) is provided with a first inclined surface (15), the check valve spool (2) is also provided with a second inclined surface (16) matched with the first inclined surface (15), and the maximum diameter of the second inclined surface (16) is smaller than that of the first inclined surface (15).

4. The self-sealing check valve for a large flow mold temperature zero cooling system of claim 1, wherein: The limiting piece (6) is plate-shaped, a plurality of drainage through holes are uniformly arranged on the limiting piece (6), and the number of limiting blocks arranged on the outer ring surface of the limiting piece (6) is not less than two.

5. The self-sealing check valve for a large flow mold temperature zero cooling system of claim 1, wherein: When the limiting piece (6) and the check valve spool (2) are at the maximum distance, the return spring (4) is still in a compressed state.

6. The self-sealing check valve for a large flow mold temperature zero cooling system of claim 1, wherein: The gap between the outer ring surface of the check valve spool (2) and the inner wall of the outer shell (1) is different when the check valve spool (2) is at different strokes, the gap is the largest when the check valve spool (2) moves to the maximum stroke, and vice versa.

7. A control method of the self-sealing check valve for the large flow mold temperature zero cooling system according to any one of claims 1 to 6, characterized by: The method comprises the following steps: S1, when working, the check valve spool (2) and the water inlet are initially in a closed state, and the limiting piece (6) makes the return spring (4) be in the shortest stroke, that is, the pressure of the return spring (4) on the check valve spool (2) is the maximum value in the closed state. S2, set flow and pressure monitoring device at the water inlet end of the one-way valve, when the flow and pressure are insufficient, twist the guide column (3) by external power device, make the limiting part (6) away from the one-way valve core (2), reduce the pressure of the reset spring (4) on the one-way valve core (2), so as to realize the effect of stable water inlet; S3, when the water inlet stops, reverse twist the guide column (3), make the position of the limiting part (6) restore, prevent backflow.

8. The application of the method of claim 7, through which the size of water flow and the stability of water flow can be controlled in real time through the one-way valve.

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