A pressure reducing valve and water purification system

Abstract

The present invention relates to a pressure reducing valve, comprising: a base body, having a first water passage, a second water passage, and a first water passage hole connecting the two; a piston shaft rod, movably arranged in the first water passage, the piston shaft rod comprising a long rod portion passing through the first water passage hole, and a pressure reducing portion arranged on the long rod portion; and an elastic component, elastically compressed between the base body and the piston shaft rod; the piston shaft rod is configured to: move in a direction opposite to the water flow when the water pressure passing through the first water passage is greater than a preset initial pressure value, so that the pressure reducing portion moves relative to the first water passage hole to reduce the water flow cross-sectional area of ​​the first water passage hole, thereby achieving the purpose of reducing and regulating the water pressure.

Description

Technical Field

[0001] The invention relates to the field of pressure reducing valves, and in particular to a pressure reducing valve and a water purification system. Background Art

[0002] A water purifier is a small filter used for household use, also known as a water purifier. Currently, water purifiers on the market are all equipped with a pressure reducing valve, but the types of structures are not rich enough, the structure is complex, and the assembly process is cumbersome. In view of the above problems, the inventor proposed this application. Summary of the invention

[0003] Based on the above problems, the present invention provides a pressure reducing valve and a water purification system, aiming to at least provide a pressure reducing valve with a simple structure.

[0004] The present invention is implemented in this way. In a first aspect, the present invention provides a pressure reducing valve, comprising:

[0005] The base body has a first water passage, a second water passage, and a first water hole connecting the first water passage and the second water passage;

[0006] A piston shaft rod is movably disposed in the first water passage, the piston shaft rod comprising a long rod portion passing through the first water passage hole and a pressure relief portion disposed on the long rod portion; and

[0007] An elastic component elastically compressed between the base and the piston shaft;

[0008] The piston shaft is configured to move in a direction opposite to the water flow when the water pressure passing through the first water passage is greater than a preset initial pressure value, so that the pressure reducing portion moves relative to the first water passage hole to reduce the water flow cross-sectional area of ​​the first water passage hole.

[0009] Preferably, the piston shaft divides the first water passage into a first chamber and a second chamber, and includes a second water hole connecting the two; in the direction of water flow, the water pressure area of ​​the first end face of the piston shaft close to the first water hole is greater than the water pressure area of ​​the second end face opposite to the end face.

[0010] Preferably, the initial preload force of the elastic component supporting the base and the piston shaft is the product of the difference between the area of ​​the first end face and the area of ​​the second end face and the preset initial pressure value; wherein, the elastic coefficient of the elastic component is K, the initial compression amount is X1, and the initial preload force is K*X1.

[0011] Preferably, a closing piece is arranged on the piston shaft, and when the water pressure passing through the first water passage is not less than a preset limit pressure value, the closing piece abuts against the base and closes the first water hole; wherein, when the water pressure is less than the preset limit pressure value, the elastic component pushes the piston shaft to move to open the first water hole.

[0012] Preferably, when the closing member abuts against the base, the limit elastic force value of the elastic component is the product of the difference between the area of ​​the first end face and the area of ​​the second end face and the preset limit pressure value; wherein, the elastic coefficient of the elastic component is K, the limit compression amount is X2, then the limit elastic force value is K*X2.

[0013] Preferably, the end edge of the first water passage hole is configured as a flange portion protruding toward the closing member, and the closing member abuts against the flange portion.

[0014] Preferably, the pressure reducing portion is arranged in the second water passage and is constructed as a structure whose radial dimension gradually increases in the direction away from the first water passage hole. When the water pressure pushes the piston shaft to move, the pressure reducing portion moves into the first water passage hole and gradually reduces the water passage cross-sectional area of ​​the first water passage hole during the movement.

[0015] Preferably, the substrate comprises:

[0016] The upper valve housing has a convex ring forming the first water hole, the piston shaft abuts against the convex ring under the pressure of the elastic component and the outer periphery is slidably matched with the upper valve housing through a first sealing member, and an active chamber for accommodating the elastic component is formed between the piston shaft and the upper valve housing;

[0017] A fixed seat, one end of the outer periphery of which abuts against the upper valve housing, and has a wall portion, and the inner peripheral surface of the piston shaft is slidably matched with the wall portion through a second sealing member to form a sealed first water passage; and

[0018] The lower valve housing is detachably connected to the upper valve housing and fixes the fixing seat, and the elastic component abuts between the fixing seat and the piston shaft.

[0019] Preferably, the upper valve shell is provided with an air hole communicating with the active chamber and the external space.

[0020] In a second aspect, the present invention further provides a water purification system, comprising any of the above-mentioned pressure reducing valves, wherein the pressure reducing valve comprises a water inlet connected to a first water passage and a water outlet connected to a second water passage, and the water outlet is used to connect to a water purifier.

[0021] By adopting the above technical solution, the present invention can achieve the following technical effects:

[0022] The pressure reducing valve provided in the above scheme of the present invention is matched by arranging a piston shaft, an elastic component, a pressure reducing part and a base body, has a simple structure and is easy to install, so as to achieve the purpose of automatically adjusting the water pressure when the water pressure changes. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the exploded structure of the pressure reducing valve of the present invention;

[0024] Figure 2 It is a schematic cross-sectional structure diagram of the pressure reducing valve of the present invention;

[0025] Figure 3 It is a schematic diagram of the cross-sectional structure of the pressure reducing valve of the present invention, wherein the diagram shows a state when the water pressure is greater than P1 and less than P2;

[0026] Figure 4 It is a schematic diagram of the cross-sectional structure of the pressure reducing valve of the present invention, wherein the diagram shows a state when the water pressure is greater than P2.

[0027] Figure ID

[0028] 1. Base; 2. Upper valve shell; 21. First water passage; 211. Second chamber; 212. First chamber; 22. Second water passage; 23. First water hole; 24. Air hole; 3. Lower valve shell; 4. Fixed seat; 5. Piston shaft; 51. Sliding component; 511. First sliding part; 512. Second sliding part; 52. Long rod part; 53. Closed mounting part; 54. Closing part; 55. Second water hole; 56. Pressure reducing part; 6. Elastic component; 7. Third sealing component. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention.

[0030] In the description of the present invention, it needs to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "upper end", "lower end", "upper section", "lower section", "upper side", "lower side", "middle", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0031] Now combined Figures 1 to 4 The structure and function of the solution of this application are described in detail.

[0032] The present invention provides a water purification system (not shown) and a pressure reducing valve, wherein the water purification system comprises the pressure reducing valve and a water purifier. The water inlet of the pressure reducing valve is connected to a water source, and the water outlet of the pressure reducing valve is connected to the water purifier. The pressure reducing valve is arranged between the water source and the water purifier to provide a water flow with a suitable water pressure for the water purifier.

[0033] refer to Figure 1 and Figure 2 The pressure reducing valve includes a base 1, a piston shaft 5 and an elastic component 6. The base 1 includes an upper valve shell 2, a lower valve shell 3 and a fixed seat 4. The lower valve shell 3 has a water inlet, and the upper valve shell has a water outlet for connecting to a water purifier. The piston shaft 5 is arranged on the upper valve shell 2 and is axially movable relative to the upper valve shell 2. The upper valve shell 2 has a first water passage 21 and a second water passage 22, and the two water passages are connected through a first water passage hole 23. The fixed seat 4 is arranged on the upper valve shell 2, and is used to support the piston shaft 5 in the first water passage 21. The lower valve shell 3 is detachably connected to the upper valve shell 2, and fixedly supports the fixed seat 4 after installation, wherein the lower valve shell 3 and the fixed seat 4 are abutted by a third sealing member 7.

[0034] A convex ring is arranged on the inner side of the upper valve shell 2, and the convex ring forms the first water passage hole 23. The piston shaft 5 has a sliding component 51, a long rod portion 52 and a pressure relief portion 56. The sliding component 51 includes a first sliding portion 511 and a second sliding portion 512, and the first sliding portion 511 is slidably matched with the inner peripheral side of the upper valve shell 2 through a first seal. The second sliding portion 512 is slidably matched with the fixed seat 4 through a second seal, wherein the fixed seat 4 has a wall portion for slidably matching with the second seal. Among them, the sliding component 51 has a sliding wall, and the inner peripheral surface of the sliding wall constitutes the second sliding portion 512. An active chamber is formed between the outer peripheral surface of the sliding wall and the upper valve shell 2 for loading the elastic component 6, and the two ends of the elastic component 6 along the axial direction are respectively abutted on the convex ring and the fixed seat 4. Among them, an air hole 24 connecting the active chamber and the external space is opened on the upper valve shell 2 to prevent excessive changes in the air pressure of the active chamber when the piston shaft 5 moves.

[0035] The sliding part 51 and the long rod part 52 of the piston shaft 5 are connected by a plate-like barrel bottom structure, and the plate-like structure divides the first water passage 21 into a first chamber 212 and a second chamber 211. At least one second water passage hole 55 is provided on the plate-like structure, and the first chamber 212 and the second chamber 211 are connected through the second water passage hole 55. The long rod part 52 extends axially through the first water passage hole 23 and is partially in the second water passage 22. In the direction of water flow, the water pressure area of ​​the first end face of the plate-like structure of the piston shaft 5 close to the first water passage hole 23 is larger than the water pressure area of ​​the second end face opposite to the end face, so that the piston shaft 5 can be pushed from the first end face side to the second end face side under water pressure.

[0036] Initially, the elastic component 6 is pre-compressed between the piston shaft 5 and the base 1. The initial preload force of the elastic component 6 supporting the base 1 and the piston shaft 5 is the product of the difference between the area of ​​the first end face and the area of ​​the second end face and the preset initial pressure value. Wherein, the elastic coefficient of the elastic component 6 is K, the initial compression amount is X1, and the initial preload force is K*X1. That is, the initial preload force F1=K*X1=(S1-S2)*P1, where P1 is the preset initial pressure value, that is, the pressure value that makes the piston shaft 5 move, S1 is the area of ​​the first end face, S2 is the area of ​​the second end face, and when the water pressure is greater than the preset initial pressure value P1, the piston shaft 5 moves under the push of the water pressure.

[0037] refer to Figure 3A pressure reducing portion 56 is provided on the long rod portion 52. The pressure reducing portion 56 is arranged in the second water passage 22 and is configured as a structure whose radial dimension gradually increases in the direction away from the first water passage hole 23. When the water pressure is greater than P1 and pushes the piston shaft 5 to move, the pressure reducing portion 56 moves into the first water passage hole 23 and gradually reduces the water passage cross-sectional area of ​​the first water passage hole 23 during the movement. At this time, the flow velocity increases and the water pressure decreases.

[0038] refer to Figure 4 , the long rod 52 has a closed mounting portion 53 on the downstream side of the pressure reducing portion 56, on which a closing member 54 is arranged. When the water pressure passing through the first water passage is not greater than or equal to the preset limit pressure value, the closing member 54 abuts against the base 1 and closes the first water passage 23. When the closing member 54 abuts against the base 1, the limit elastic force value of the elastic member 6 is the product of the difference between the area of ​​the first end face and the area of ​​the second end face and the preset limit pressure value; wherein the elastic coefficient of the elastic member 6 is K, and the limit compression amount is X2, then the limit elastic force value is K*X2. That is, the limit elastic force value F2 of the elastic member 6 = K*X2 = (S1-S2)*P2, wherein P2 is the maximum allowable pressure of the water pressure, the limit elastic force value is the elastic force value corresponding to the elastic member 6 when the maximum allowable pressure is reached, and the limit compression amount X2 is the maximum compression amount of the elastic member 6 when the closing member 54 abuts against the first water passage 23, wherein the elastic member 6 can be one or more compression springs. When the water pressure is less than the preset limit pressure value, the elastic component 6 pushes the piston shaft 5 to return to its original position, thereby opening the first water hole 23 .

[0039] The end edge of the first water hole is formed as a flange portion protruding toward the sealing member, and the sealing member abuts against the flange portion to reduce the contact area between the sealing member and the flange portion, thereby achieving a complete sealing effect. The sealing member can be made of silicone rubber material.

[0040] The solution of the present invention can automatically achieve the purpose of regulating water pressure by cooperating the piston shaft 5, the elastic component 6, the pressure reducing portion 56 and the base 1, with a simple structure and easy installation.

[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pressure reducing valve, characterized in that: include: The base body has a first water passage, a second water passage, and a first water hole connecting the first water passage and the second water passage; A piston shaft rod is movably disposed in the first water passage, the piston shaft rod comprising a long rod portion passing through the first water passage hole and a pressure relief portion disposed on the long rod portion; and An elastic component elastically compressed between the base and the piston shaft; The piston shaft is configured to move in a direction opposite to the water flow when the water pressure passing through the first water passage is greater than a preset initial pressure value, so that the pressure reducing portion moves relative to the first water passage hole to reduce the water flow cross-sectional area of ​​the first water passage hole; the base body includes: The upper valve housing has a convex ring forming the first water hole, the piston shaft abuts against the convex ring under the pressure of the elastic component and the outer periphery is slidably matched with the upper valve housing through a first sealing member, and an active chamber for accommodating the elastic component is formed between the piston shaft and the upper valve housing; A fixed seat, one end of the outer periphery of which abuts against the upper valve housing, and has a wall portion, and the inner peripheral surface of the piston shaft is slidably matched with the wall portion through a second sealing member to form a sealed first water passage; and The lower valve housing is detachably connected to the upper valve housing and fixes the fixing seat, and the elastic component abuts between the fixing seat and the piston shaft.

2. The pressure reducing valve according to claim 1, characterized in that: The piston shaft divides the first water passage into a first chamber and a second chamber, and includes a second water hole connecting the two; in the direction of water flow, the water pressure area of ​​the first end face of the piston shaft close to the first water hole is greater than the water pressure area of ​​the second end face opposite to the end face.

3. The pressure reducing valve according to claim 2, characterized in that: The initial preload force of the elastic component supporting the base and the piston shaft is the product of the difference between the area of ​​the first end face and the area of ​​the second end face and the preset initial pressure value; wherein, the elastic coefficient of the elastic component is K, the initial compression amount is X1, and the initial preload force is K*X1.

4. The pressure reducing valve according to claim 2, characterized in that: A closing piece is arranged on the piston shaft, and when the water pressure passing through the first water passage is not less than a preset limit pressure value, the closing piece abuts against the base and closes the first water passage hole; wherein, when the water pressure is less than the preset limit pressure value, the elastic component pushes the piston shaft to move to open the first water passage hole.

5. The pressure reducing valve according to claim 4, characterized in that: When the closing member abuts against the base, the limit elastic force value of the elastic component is the product of the difference between the area of ​​the first end face and the area of ​​the second end face and the preset limit pressure value; wherein, the elastic coefficient of the elastic component is K, the limit compression amount is X2, and the limit elastic force value is K*X2.

6. The pressure reducing valve according to claim 4, characterized in that: The end edge of the first water passage hole is configured as a flange portion protruding toward the closing member, and the closing member abuts against the flange portion.

7. The pressure reducing valve according to claim 1, characterized in that: The pressure reducing portion is arranged in the second water passage and is configured as a structure whose radial dimension gradually increases in the direction away from the first water passage hole. When the water pressure pushes the piston shaft to move, the pressure reducing portion moves into the first water passage hole and gradually reduces the water passage cross-sectional area of ​​the first water passage hole during the movement.

8. The pressure reducing valve according to claim 1, characterized in that: The upper valve shell is provided with an air hole communicating with the active chamber and the external space.

9. A water purification system, characterized in that: It comprises the pressure reducing valve according to any one of claims 1 to 8, wherein the pressure reducing valve comprises a water inlet connected to a first water passage and a water outlet connected to a second water passage, and the water outlet is used to connect to a water purifier.

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