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Electric-controlled micro valve implemented by shape memory alloy

A memory alloy, electronically controlled technology, used in lift valves, valve details, multi-way valves, etc., can solve the problems of difficult modification and complex structure, and achieve the effect of small size, reduced volume and weight, and large modification space.

Inactive Publication Date: 2009-08-19
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this traditional valve is difficult to meet these needs because of its precise structure and complex structure, and it is not easy to be refitted.

Method used

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  • Electric-controlled micro valve implemented by shape memory alloy
  • Electric-controlled micro valve implemented by shape memory alloy
  • Electric-controlled micro valve implemented by shape memory alloy

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0068] Specific implementation mode one: see Figure 9 ~ Figure 13, this embodiment is a common general application mode. The main structure includes liquid spray pipe body 1-1, valve ball 1-2, bias pressure spring 1-3, linkage wire 1-4, spout pipe 1-5, separation layer 2-1, terminal post 2-2, Thread hole 2-3, liquid hole 2-4, liquid inlet pipe body 3-1, shape memory alloy driver 3-2, liquid inlet branch pipe 3-3, exhaust branch pipe 3-4, exhaust pipe sealing bolt 4 -1, top fixing bolt 4-2, top fixing nut 4-3, sealing gasket 4-4. The liquid inlet pipe body 3-1 and the liquid spray pipe body 1-1 are connected to the upper and lower ends of the separation layer 2-1 by threads to form the valve body of the valve; the shape memory alloy driver 3-2 serves as the core driving force provider, and one end of it is passed through The top fixing bolt 4-2, the top fixing nut 4-3 and the sealing gasket 4-4 are fixed on the inner top of the liquid inlet pipe body 3-1, and the bottom ring...

specific Embodiment approach 2

[0072] Specific implementation mode two: see Figure 14 ~ Figure 18 , which is an improved solution for the design form in the first specific embodiment. Although the design in the specific embodiment 1 is simple and feasible, there is a problem of inflexibility in application. In this specific embodiment, the structure is as Figure 14 As shown, the main structure is basically the same as that described in Embodiment 1 and its connection method: it still includes a liquid spray pipe body 1-1, a valve ball 1-2, a biasing pressure spring 1-3, and a linkage wire 1- 4. Spout pipe 1-5, separation layer 2-1, terminal post 2-2), thread hole 2-3, liquid hole 2-4, liquid inlet pipe body 3-1, shape memory alloy driver 3-2 , liquid inlet branch pipe 3-3, exhaust branch pipe 3-4, exhaust pipe sealing bolt 4-1, top fixing bolt 4-2, top fixing nut 4-3, sealing gasket 4-4, but it also increases The liquid inlet pipe lower liquid branch pipe 7-1 and the liquid spray pipe upper liquid bran...

Embodiment approach

[0075] The second sub-implementation mode: as Figure 17 As shown, the feature of this method is that when the liquid is initially added, the way of liquid intake is different from that described in Embodiment 1. At this time, the exhaust branch pipe 3-4 on the liquid inlet pipe body 3-1 must be sealed Get up, and at the same time use bolts to tighten and seal the upper liquid branch pipe 7-2 of the liquid spray pipe. After the liquid flows in from the liquid inlet branch pipe 3-3, when there is liquid flowing out from the liquid inlet pipe lower liquid branch pipe 7-1, it means that the liquid has passed. The inner cavity of the entire spray pipe body 1-1 is filled, and the liquid hole 2-4 of the separation layer 2-1 is unblocked. Since the through hole of the liquid branch pipe 7-1 under the liquid inlet pipe is close to the separation layer 2-1, the water liquid will basically not submerge the shape memory alloy driver 3-2 at this time. Then fasten and seal the lower fluid...

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Abstract

An electronic control micro valve realized by shape memory alloy comprises a liquid inlet tube, a spacer layer, a sparge pipe, a shape memory alloy drive, a linkage piece, a valve ball and a bias pressure spring; wherein, the liquid inlet tube and the sparge pipe are connected by being respectively connected and fixed with the spacer layer; the valve ball is positioned in the sparge pipe and is over against a jet pipe; one side of the valve ball far away from the jet pipe is connected with the linkage piece; the other end of the linkage piece is connected with the shape memory alloy drive by passing through the spacer layer; the other end of the shape memory alloy drive is fixed at the top of the liquid inlet tube; one end of the bias pressure spring is against the spacer layer and the other end thereof is connected with the valve ball; under certain pressure state, the bias pressure spring presses the valve ball against the jet pipe to cause the jet pipe to close; the electric energy controls the shape memory alloy drive to act to drive the valve ball to further open and close the valve. The micro valve has low manufacturing cost, small volume, light weight, simple structure and simple and convenient assembly and disassembly and is easily suitable for certain specific industry and agriculture and life automation requirements by improving structures.

Description

technical field [0001] The invention relates to a controllable valve element device, in particular to an electric energy control valve realized by shape memory alloy. Background technique [0002] Traditional micro valves are usually controlled electromagnetically. This kind of micro-valve realizes the opening and closing of the valve through the magnetic force generated by the electromagnetic coil to drive the valve core and the clutch valve port. Usually this kind of valve has high cost, small flow coefficient, and is easily damaged by voltage shock. Moreover, its control voltage is usually 12V or 24V and above, which is not suitable for some applications that require a lower voltage drive. In addition, in some practical application scenarios, it is necessary to use the valve for some specific signal output to precisely control the flow of water to meet the needs of automatic control. However, this traditional valve is difficult to meet these requirements because of its...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/14F16K31/64F16K11/044
Inventor 何斌刘振黎明和
Owner TONGJI UNIV
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