A precisely controlled pinch proportional valve

Abstract

The present invention relates to a precisely controlled pipe-pinch proportional valve, comprising a housing, an electromagnetic component, a base, an upper cover, a valve core, an elastic member, a slide plate and a hose; the electromagnetic component is arranged in the housing, the base is arranged on the housing, the upper cover is arranged on the base, and the slide plate is inserted into the upper cover; the hose passes through the upper cover, the upper side of the hose is relatively fixed to the slide plate, and the lower side of the hose is relatively fixed to the upper end of the valve core; the valve core is slidably engaged with the base, and the electromagnetic component drives the valve core to move through electromagnetic induction; the elastic member cooperates with the valve core so that the upper end of the valve core supports the hose; in this solution, the upper and lower sides of the hose are respectively fixed to the slide plate and the valve core, so that the hose can be fixed relative to the pipe-pinch valve, the hose will not move, and the repeatability accuracy is high; and when the valve core is opening and closing, it drives the lower side of the hose to move synchronously, ensuring that the hose is deformed in time without delay, thereby improving the control accuracy of the pipe-pinch proportional valve for flow.

Description

Technical Field

[0001] The invention relates to a precisely controlled pinch proportional valve, belonging to the technical field of pinch valves. Background Art

[0002] The tube of a traditional pinch valve is generally in a semi-free state, fixed by the gas and liquid connection components at both ends. The valve only clamps the tube and controls the flow when it is working; therefore, the position accuracy of the tube is poor each time it is reused.

[0003] Moreover, the pipes are generally soft tubes. When they are not used for a long time, the valve is in a state of clamping the pipe, causing the pipe to deform. At this time, if the pinch valve is opened, it takes a certain amount of time for the pipe to recover, which will lead to poor flow control accuracy.

[0004] To address this problem, the existing solution is generally to install a mechanical control structure on the other two sides of the tube to link it with the valve core. When the valve core is loosened, the mechanical control structure is pushed synchronously to accelerate the recovery of the hose's deformation, such as patent CN201821599324.1 "Pinch Valve".

[0005] However, this structure will lead to a significant increase in the cost of the pinch valve, and the mechanical control structures on both sides will exert force on the valve core to a certain extent, increasing the difficulty of precise control of the valve. Summary of the Invention

[0006] The present invention aims to overcome the deficiencies of the prior art and provide a precisely controlled pinch proportional valve.

[0007] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: a precisely controlled pipe-pinch proportional valve, comprising a housing, an electromagnetic component, a base, an upper cover, a valve core, an elastic member, a slide plate, and a hose; the electromagnetic component is disposed in the housing, the base is disposed on the housing, the upper cover is disposed on the base, and the slide plate is inserted into the upper cover; the hose passes through the upper cover, the upper side of the hose is relatively fixed to the slide plate, and the lower side of the hose is relatively fixed to the upper end of the valve core; the valve core is slidably engaged with the base, and the electromagnetic component drives the valve core to move through electromagnetic induction; the elastic member cooperates with the valve core so that the upper end of the valve core presses against the hose.

[0008] Preferably, the upper side of the hose is bonded to the slide plate, and the lower side of the hose is bonded to the upper end of the valve core.

[0009] Preferably, a sliding slot is provided on the upper cover, and the slide plate is slidably engaged with the sliding slot.

[0010] Preferably, the valve core is a cylindrical structure, the elastic member is a spring, and the elastic member is sleeved on the valve core.

[0011] Preferably, a fixed core is provided in the housing, the lower end of the fixed core is fixed to the housing through a locking nut, and the upper end of the fixed core is matched with the lower end of the valve core.

[0012] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0013] The precisely controlled pinch proportional valve of the present invention fixes the upper and lower sides of the hose relative to the slide and the valve core, respectively, so that the position of the hose relative to the pinch valve is fixed and the hose does not move, with high repeatability. Moreover, when the valve core is opening and closing, it drives the lower side of the hose to move synchronously, ensuring that the hose deforms in a timely manner without delay, thereby improving the control accuracy of the pinch proportional valve over the flow rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The technical solution of the present invention will be further described below with reference to the accompanying drawings:

[0015] Attachment Figure 1 Schematic diagram of a precisely controlled pinch proportional valve according to the present invention;

[0016] Attachment Figure 2 for Figure 1 AA section view. DETAILED DESCRIPTION

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] like Figure 1 、 2 As shown, the precisely controlled pinch proportional valve of the present invention comprises a housing 1 , an electromagnetic component 2 , a base 3 , an upper cover 4 , a valve core 5 , an elastic member 6 , a slide plate 7 and a hose 8 .

[0019] The electromagnetic component 2 is generally an electromagnetic coil, which is arranged in the shell 1. The base 3 is installed on the shell 1. The lower part of the base 3 is inserted into the shell 1 from the upper end of the shell 1. The upper cover 4 is installed on the base 3 and is fixed to the base 3 by screw locking or interference fit. The upper cover 4 and the base 3 can also be processed into an integrated structure.

[0020] This solution is designed to fix the hose 8 up and down by means of colloid bonding. Due to the complex shape of the upper cover 4, after the upper cover 4 and the hose 8 are relatively fixed, it is impossible to fix them to the valve core 5 in the accurate position; therefore, a slide plate 7 is added, and a sliding slot is provided on the upper cover 4. The slide plate 7 slides in conjunction with the sliding slot. The sliding slot can be a full-length structure, so that the slide plate 7 can be inserted from either end of the upper cover 4, and can be selectively locked by screws after insertion.

[0021] The hose 8 passes through the upper cover 4, and the upper end of the valve core 5 and the slide 7 are made of existing adhesive materials. The upper side of the hose 8 is bonded to the slide 7 by a colloid. After the hose 8 is bonded to the slide 7, it is sent to a specific position through the slide 7, and then the lower side of the hose 8 is bonded to the upper end of the valve core 5 by a colloid, so that the hose 8 is accurately positioned relative to the upper cover 4 and the valve core 5 and cannot move.

[0022] The lower end of the valve core 5 is inserted into the base 3 and slides with the base 3. The electromagnetic component 2 drives the valve core 5 to move up and down slightly through electromagnetic induction; the valve core 5 can control the deformation of the hose 8, change the flux of the hose 8, and thus precisely control the flow.

[0023] The valve core 5 is a columnar structure, and the elastic member 6 is a spring. The elastic member 6 is sleeved on the valve core 5. When the electromagnetic component 2 is not energized, the valve core 5 presses against the hose 8 under the action of the spring, closing the hose 8 and preventing the medium from flowing.

[0024] The housing 1 is provided with a fixed core 9, the lower end of which is fixed to the housing 1 by a locking nut 10. When the electromagnetic coil is energized, the fixed core 9 generates magnetism, which generates a magnetic attraction force on the valve core 5. The valve core 5 is the dynamic core; and the upper end of the fixed core 9 cooperates with the lower end of the valve core 5 to limit the maximum downward distance of the valve core 5, thereby preventing the valve core 5 from over-traveling and causing problems such as colloid tearing.

[0025] This solution uses a colloid bonding method as an embodiment to fix the hose 8; in fact, the above effect can also be achieved by designing a special structure of the upper cover 4, the valve core 5, and the slide plate 7 so that these components clamp the hose 8 through interference fit or other methods, or by fixing them through other methods such as mechanical or hot melting; that is, as long as the upper side of the hose 8 is fixed relative to the upper cover 4 and the lower side of the hose 8 is fixed relative to the valve core 5, the requirements of this solution can be met.

[0026] The above are only specific application examples of the present invention and do not constitute any limitation on the scope of protection of the present invention. Any technical solutions formed by equivalent transformation or equivalent replacement shall fall within the scope of protection of the present invention.

Claims

1. A precisely controlled pinch proportional valve, characterized by: The invention comprises a housing (1), an electromagnetic component (2), a base (3), an upper cover (4), a valve core (5), an elastic member (6), a slide plate (7) and a hose (8); the electromagnetic component (2) is arranged in the housing (1), the base (3) is arranged on the housing (1), the upper cover (4) is arranged on the base (3), and the slide plate (7) is inserted into the upper cover (4); the hose (8) passes through the upper cover (4), the upper side of the hose (8) is bonded to the slide plate (7), and the lower side of the hose (8) is bonded to the upper end of the valve core (5); the valve core (5) is slidably matched with the base (3), and the electromagnetic component (2) drives the valve core (5) to move through electromagnetic induction; the elastic member (6) is matched with the valve core (5) so that the upper end of the valve core (5) supports the hose (8); a sliding slot is provided on the upper cover (4), and the slide plate (7) is slidably matched with the sliding slot.

2. The precisely controlled pinch proportional valve according to claim 1, characterized in that: The valve core (5) is a columnar structure, the elastic member (6) is a spring, and the elastic member (6) is sleeved on the valve core (5).

3. The precisely controlled pinch proportional valve according to claim 1, characterized in that: A fixed core (9) is provided in the housing (1), the lower end of the fixed core (9) is fixed to the housing (1) via a locking nut (10), and the upper end of the fixed core (9) is engaged with the lower end of the valve core (5).

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