PFA one-way valve for fluid control
By designing PFA check valves, using PFA material and threaded connections, combined with anti-blocking structure, the reflow and corrosion problems of existing fluid check valves are solved, and the fluid control effect with stable operation and long life is achieved.
Patent Information
- Application Number
- CN202421156643.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-25
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-05-25
AI Technical Summary
Existing fluid check valves are prone to reflux and reverse overflow during use, and the product life is short due to corrosion problems caused by metal materials.
A PFA check valve is designed, made of PFA material, built-in piston and spring, which can achieve one-way flow through threaded connection and anti-blocking structure to avoid reflow, and use PFA parts to seal themselves to avoid metal corrosion.
It effectively prevents reflow and reverse overflow, improves system stability, extends product life, and has excellent sealing performance and high pressure resistance.
Smart Images
Figure CN222255155U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field related to one-way valves, in particular to a PFA one-way valve for fluid control. Background Art
[0002] A one-way valve is a valve that allows fluid to only flow along the inlet, but the medium at the outlet cannot flow back. It is commonly known as a one-way valve. A one-way valve is also called a check valve or a non-return valve. It is used in hydraulic systems to prevent oil from flowing in the opposite direction, or in pneumatic systems to prevent compressed air from flowing in the opposite direction. There are two types of one-way valves: straight-through and right-angle. Straight-through one-way valves are installed on the pipeline with a threaded connection, and right-angle one-way valves are available in three types: threaded connection, plate connection, and flange connection.
[0003] However, the fluid check valves currently in use often have the characteristics of unidirectional flow, and backflow, reverse overflow or other fluid phenomena often occur, which cannot guarantee the stable operation of the system. In addition, due to problems with the metal material, corrosion occurs after long-term use, resulting in a short product life. Utility Model Content
[0004] The purpose of the utility model is to provide a PFA one-way valve for fluid control, so as to solve the problem that the one-way valve currently used for fluid mentioned in the above background technology has the characteristics of one-way flow, backflow, reverse overflow or other fluid phenomena often occur, and the stable operation of the system cannot be guaranteed. In addition, due to the problem of metal material, corrosion occurs after long-term use, resulting in a short product life.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a PFA one-way valve for fluid control, comprising a PFA water inlet pipe, a piston and a spring are respectively installed on one side of the interior of the PFA water inlet pipe, one end of the piston and one end of the spring are in conflict with each other, the left and right ends of the PFA water inlet pipe are respectively connected to a PFA nut 1 and one end of a PFA water outlet pipe, the other end of the PFA water outlet pipe is connected to a PFA nut 2, and an anti-blocking structure is installed on the other side of the interior of the PFA water inlet pipe.
[0006] Preferably, the PFA water inlet pipe and the PFA nut are threadedly connected, and the outer wall surface of the connection between the PFA water inlet pipe and the PFA nut is threaded.
[0007] Preferably, the PFA water outlet pipe includes a front water outlet pipe, a rear water outlet pipe and a connecting head, the front water outlet pipe is integrally connected to the rear water outlet pipe, the outer wall of the rear water outlet pipe is provided with a connecting head, the front water outlet pipe and the PFA water inlet pipe, as well as the rear water outlet pipe and the PFA nut 2 are all threadedly connected, and the inner wall surface of the connection between the PFA water inlet pipe and the front water outlet pipe is threaded, and the diameter of the front water outlet pipe is larger than the diameter of the rear water outlet pipe, and the combined cross-section of the front water outlet pipe and the rear water outlet pipe is "Z" shaped.
[0008] Preferably, the other end of the spring conflicts with one end of the water outlet rear pipe.
[0009] Preferably, the anti-blocking structure includes a buckle, a clip strip, a filter screen 1 and a filter screen 2, the buckle is fixedly connected to the front end of the inner wall of the PFA water inlet pipe, and the buckle is set in an "L" shape, the buckle is connected to the clip strip, the buckle and the clip strip are symmetrically arranged with respect to the central axis of the PFA water inlet pipe, filter screen 1 and filter screen 2 are respectively installed between the clip strips, and filter screen 1 and filter screen 2 are arranged front and back, and the apertures of filter screen 1 and filter screen 2 are gradually reduced.
[0010] Compared with the prior art, the beneficial effects of the utility model are:
[0011] The PFA one-way valve used for fluid control can effectively prevent backflow, reverse overflow or other unnecessary fluid phenomena due to its one-way flow characteristics, thereby ensuring the stable operation of the system. It also relies on the self-sealing of PFA parts, without the need for sealing rings and metal springs, and can prevent the sealing rings from being corroded by acid and alkali liquids and leaking, and the metal from being corroded and immersed in the solution, making the product have a long service life, excellent sealing performance, and high pressure resistance. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is an explosion diagram of the utility model;
[0013] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;
[0014] Figure 3 This is a schematic diagram of the facade structure of the utility model;
[0015] Figure 4 For this utility model Figure 1 Schematic diagram of the enlarged structure of part A in the middle.
[0016] In the figure: 1. PFA water inlet pipe; 2. Piston; 3. Spring; 4. PFA water outlet pipe; 41. Front water outlet pipe; 42. Rear water outlet pipe; 43. Connector; 5. PFA nut one; 6. PFA nut two; 7. Anti-blocking structure; 71. Buckle; 72. Clip strip; 73. Filter one; 74. Filter two. DETAILED DESCRIPTION
[0017] 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.
[0018] See also Figure 1-4 The utility model provides a technical solution: a PFA one-way valve for fluid control, comprising a PFA water inlet pipe 1, a piston 2, a spring 3, a PFA water outlet pipe 4, a PFA nut 1 5, a PFA nut 2 6 and an anti-blocking structure 7. A piston 2 and a spring 3 are respectively installed on one side of the inner part of the PFA water inlet pipe 1, one end of the piston 2 and one end of the spring 3 are in conflict with each other, the PFA water inlet pipe 1 and the PFA nut 1 5 are threadedly connected, and the outer wall surface of the connection between the PFA water inlet pipe 1 and the PFA nut 1 5 is threaded, and the other end of the spring 3 is in conflict with one end of the water outlet rear pipe 42. The threaded connection method can realize the rapid disassembly and assembly between the water pipe and various parts, and through the telescopic function of the spring 3, the piston 2 can be controlled to move to the left or right, so that the entire PFA water inlet pipe 1 can realize the automatic water inlet and automatic water cut-off functions when there is water pressure or no water pressure;
[0019] The left and right ends of the PFA water inlet pipe 1 are respectively connected to the PFA nut 1 5 and one end of the PFA water outlet pipe 4. The PFA water outlet pipe 4 includes a water outlet front pipe 41, a water outlet rear pipe 42 and a connector 43. The water outlet front pipe 41 is integrally connected with the water outlet rear pipe 42. The outer wall of the water outlet rear pipe 42 is provided with a connector 43. The water outlet front pipe 41 and the PFA water inlet pipe 1 are threadedly connected, and the water outlet rear pipe 42 is threadedly connected to the PFA nut 2 6 through the connector 43. The inner wall surface of the connection between the PFA water inlet pipe 1 and the water outlet front pipe 41 is threaded, and the diameter of the water outlet front pipe 41 is larger than the diameter of the water outlet rear pipe 42. At the same time, the combined cross-section of the water outlet front pipe 41 and the water outlet rear pipe 42 is "Z"-shaped, which can facilitate the user to connect the PFA water inlet pipe 1, the water outlet front pipe 41 and the PFA nut, which is convenient, simple and practical.
[0020] The other end of the PFA water outlet pipe 4 is connected to the PFA nut 2 6, and an anti-blocking structure 7 is installed on the other side of the inside of the PFA water inlet pipe 1. The anti-blocking structure 7 includes a buckle 71, a clamping strip 72, a filter 1 73 and a filter 2 74. The buckle 71 is fixedly connected to the front end of the inner wall of the PFA water inlet pipe 1, and the buckle 71 is set in an "L" shape. The buckle 71 is connected to the clamping strip 72. The buckle 71 and the clamping strip 72 are symmetrically arranged with respect to the central axis of the PFA water inlet pipe 1. A filter 1 73 and a filter 2 74 are respectively installed between the clamping strips 72, and the filter 1 73 and the filter 2 74 are arranged front and back, and the apertures of the filter 1 73 and the filter 2 74 are gradually reduced. The arrangement of the buckle 71 and the clamping strip 72 can facilitate the user to disassemble and assemble the filter, so as to facilitate the user to clean the filter. At the same time, the filter can filter the water entering the PFA water inlet pipe 1 to avoid blockage of the PFA water inlet pipe 1 during operation.
[0021] Working principle: For this type of PFA one-way valve used for fluid control, firstly, the piston 2 and the spring 3 are both embedded in the front end of the PFA water inlet pipe 1, at which time one end of the piston 2 and one end of the spring 3 are in conflict with each other, and then the threaded groove of the inner wall at the rear end of the PFA water inlet pipe 1 is threadedly connected with the front water outlet pipe 41 in the PFA water outlet pipe 4, and then the rear water outlet pipe 42 is threadedly connected with the PFA nut 2 6 through the connector 43, and then the threaded end of the outer wall at the front end of the PFA water inlet pipe 1 is threadedly connected with the PFA nut 1 5;
[0022] Then water flows in from the PFA water inlet pipe 1. Under the impact of water pressure, the spring 3 is compressed, the piston 2 opens to the right, and the entire one-way valve flows water normally and works.
[0023] When water supply is required to be cut off, the PFA water inlet pipe 1 stops supplying water, the spring 3 will withdraw, and at the same time, the water in the PFA water inlet pipe 1 will flow back, pressing the piston 2 against the PFA water inlet pipe 1 to realize the automatic water supply cut-off function;
[0024] In the process of water inlet, the filter screen 1 73 and the filter screen 2 74 can filter the water entering the PFA water inlet pipe 1, and when the filter screen needs to be disassembled and cleaned, the locking nut on the outer side of the clamping strip 72 is screwed out, and then the clamping strip 72 is pulled out from the "L"-shaped buckle 71 to complete the disassembly and assembly of the filter screen;
[0025] Finally, after the filter screen is cleaned, the filter screen is installed with the PFA water inlet pipe 1 according to the above method to facilitate the next water inflow of the PFA water inlet pipe 1.
[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A PFA one-way valve for fluid control, comprising a PFA water inlet pipe (1), characterized in that: A piston (2) and a spring (3) are installed on one side of the interior of the PFA water inlet pipe (1), one end of the piston (2) and one end of the spring (3) are in contact with each other, the left and right ends of the PFA water inlet pipe (1) are connected to a PFA nut 1 (5) and one end of a PFA water outlet pipe (4), respectively, the other end of the PFA water outlet pipe (4) is connected to a PFA nut 2 (6), and an anti-blocking structure (7) is installed on the other side of the interior of the PFA water inlet pipe (1).
2. A PFA one-way valve for fluid control according to claim 1, characterized in that: The PFA water inlet pipe (1) and the PFA nut (5) are threadedly connected, and the outer wall surface of the connection between the PFA water inlet pipe (1) and the PFA nut (5) is threaded.
3. A PFA one-way valve for fluid control according to claim 1, characterized in that: The PFA water outlet pipe (4) comprises a water outlet front pipe (41), a water outlet rear pipe (42) and a connector (43); the water outlet front pipe (41) is integrally connected to the water outlet rear pipe (42); the outer wall of the water outlet rear pipe (42) is provided with a connector (43); the water outlet front pipe (41) and the PFA water inlet pipe (1) are threadedly connected, and the water outlet rear pipe (42) and the PFA nut (6) are threadedly connected via the connector (43); the inner wall surface of the connection between the PFA water inlet pipe (1) and the water outlet front pipe (41) is threadedly arranged; the diameter of the water outlet front pipe (41) is larger than the diameter of the water outlet rear pipe (42); and the combined cross section of the water outlet front pipe (41) and the water outlet rear pipe (42) is arranged in a "Z" shape.
4. A PFA one-way valve for fluid control according to claim 3, characterized in that: The other end of the spring (3) is in conflict with one end of the water outlet rear pipe (42).
5. A PFA one-way valve for fluid control according to claim 1, characterized in that: The anti-blocking structure (7) comprises a buckle (71), a clamping strip (72), a filter screen 1 (73) and a filter screen 2 (74); the buckle (71) is fixedly connected to the front end of the inner wall of the PFA water inlet pipe (1), and the buckle (71) is arranged in an "L" shape. The buckle (71) is connected to the clamping strip (72), and the buckle (71) and the clamping strip (72) are symmetrically arranged with respect to the central axis of the PFA water inlet pipe (1). The filter screen 1 (73) and the filter screen 2 (74) are respectively installed between the clamping strip (72), and the filter screen 1 (73) and the filter screen 2 (74) are arranged front and back, and the apertures of the filter screen 1 (73) and the filter screen 2 (74) are gradually reduced.