Switch valve with memory alloy wire protecting and controlling structure
By designing a purely physical structure control method in the switch valve, the conductive shrapnel and memory wire are used to achieve protection and control of memory alloy wire, the problems of excessive electromagnetic force and overheating of memory wire in the prior art are solved, and the switch valve with simple structure, quiet operation and long life are realized.
Patent Information
- Application Number
- CN202510306890.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-15
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2045-03-15
AI Technical Summary
Excessive electromagnetic switch valves cause noise and heat loss when the electromagnetic force is on the moment they are powered on. When using memory wires, circuit board and program logic need to be added to avoid overheating, resulting in cost increase and structural complexity.
A switch valve is designed that does not require additional chip hardware and program control, and control and protection of memory alloy wires are achieved through pure physical structures. A closed conductive loop is formed using conductive shrapnel and memory wire, and the channel is opened and closed by the deformation driving valve core of memory wires.
It realizes effective control and protection of memory wires, reduces the use of components, has simple structure, is easy to use and maintain, and avoids noise and heat loss of solenoid valves, is quiet to operate and has a long service life.
Smart Images
Figure CN119802255A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of valve technology, in particular to a switch valve with a protection and control memory alloy wire structure. Background Art
[0002] A switch valve is a valve used to control the flow of fluid (such as liquid, gas or steam). Its main function is to open or close the fluid channel. When working, the electromagnetic switch valve uses a special coil to generate magnetic force, causing the moving iron core assembly to reciprocate, thereby opening or closing the channel in the valve body.
[0003] The electromagnetic force of the solenoid switch valve will be relatively large at the moment of power-on, causing collision between the moving iron core assembly and other metal parts and generating noise. The electromagnetic coil is prone to heat up, and long-term use will lead to a decline in the function of the coil, causing the valve to open or close unexpectedly, posing a great safety risk.
[0004] There are also products in the existing switch valves that use memory metal wire (SMA wire) to control the moving iron core assembly; the diameter of the SMA wire is usually very small, usually less than 0.1mm. Therefore, when the power supply current level is relatively high, the SMA wire will quickly reach the threshold temperature, causing the SMA wire to overheat, so the power supply needs to be reduced to avoid overheating of the SMA wire; in order to solve the above problem, existing products usually use program control to intermittently supply power to the SMA wire, so it is necessary to add circuit boards (or chips) and program logic, resulting in increased production costs and a more complex structure. Summary of the invention
[0005] In view of this, it is necessary to provide a switch valve that can protect and control the memory alloy wire structure without the need for additional chip hardware and program control.
[0006] In order to solve the above technical problems, the technical solution of the present invention is: a switch valve with a structure for protecting and controlling a memory alloy wire, comprising: A valve body, wherein the valve body has a first channel, a second channel and a third channel, the first channel has a first connection hole connected to the third channel, and the second channel has a second connection hole connected to the third channel; the outer side wall of the valve body also has a first conductive contact and a second conductive contact, the first conductive contact is fixedly electrically connected to a conductive spring, and one end of the conductive spring always maintains electrical connection with the second conductive contact under the action of its own elastic force; A valve core, wherein the valve core is movably connected to the valve body, the lower end of the valve core is located in the third channel, the lower end of the valve core is connected to a sealing gasket, the upper end of the side wall of the valve core is sleeved with a spring, and the valve core always maintains a downward movement trend under the action of the spring; the upper end of the valve core is located directly below the conductive spring; A memory metal wire, wherein two ends of the memory metal wire are electrically connected to the first conductive contact and the second conductive contact respectively, and the memory metal wire, the first conductive contact, the second conductive contact, the conductive spring and an external power source together form a closed conductive loop; the middle portion of the memory metal wire is connected to the valve core, and after the memory metal wire is powered on and heated, the memory metal wire contracts to force the valve core to overcome the force of the spring and move upward; The switch valve has the following working states: When the external power supply is turned off and the memory wire is not energized, the valve core moves downward under the action of the spring until the sealing gasket seals the second connecting hole. At this time, the first channel is connected to the third channel, and one end of the conductive spring is electrically connected to the second conductive contact. An external power source is used to supply power, and the memory wire is energized and heated. The memory wire gradually contracts and forces the valve core to move upward until the sealing gasket seals the first connecting hole, and the upper end of the valve core lifts the conductive spring sheet so that one end of the conductive spring sheet is disconnected from the electrical connection with the second conductive contact. At this time, the second channel is connected to the third channel, and the memory wire is powered off; after the power is off, the memory wire cools down and gradually returns to its original shape. The force exerted by the deformation of the memory wire on the valve core is gradually less than the force exerted by the spring on the valve core, and the valve core gradually moves downward until one end of the conductive spring sheet recovers the electrical connection with the second conductive contact. The memory wire is energized and heated. The memory wire gradually contracts and forces the valve core to move upward, so that the second channel and the third channel always remain connected.
[0007] Furthermore, the side wall of the valve core has a slot, and the memory metal wire is embedded in the slot.
[0008] Furthermore, two ends of the memory metal wire are fastened to the first conductive contact and the second conductive contact respectively by screws.
[0009] Furthermore, the valve body also has a third conductive contact and a fourth conductive contact, the third conductive contact is electrically connected to the first conductive contact, the fourth conductive contact is electrically connected to the second conductive contact, one end of the conductive spring is fixedly electrically connected to the third conductive contact, and the other end of the conductive spring is elastically electrically connected to the fourth conductive contact.
[0010] Furthermore, the first conductive contact and the second conductive contact are located on the left and right sides of the valve body, and the third conductive contact and the fourth conductive contact are located on the front and back sides of the valve body.
[0011] Furthermore, the valve body is formed by an upper cover, a middle cover and a lower cover which are fixedly connected in sequence.
[0012] Furthermore, a sealing ring is provided at the connection between the middle cover and the lower cover.
[0013] Furthermore, the upper cover and the lower cover are fixedly connected by fasteners.
[0014] Compared with the prior art, the present invention has the following beneficial effects: The switch valve can protect and control the memory alloy wire without the need for additional chip hardware and program control. The control and protection of the memory metal wire is achieved through a purely physical structure, which reduces the use of components, has a simple structure, and is easy to use and maintain.
[0015] This switch valve has the same control ability as the solenoid valve, but overcomes the noise and vibration caused by the valve core colliding with other metal parts due to the excessive electromagnetic force of the solenoid valve. Since the deformation of the memory metal wire takes a certain amount of time, the movement of the valve core will not be as rapid as that of the solenoid valve. The valve core of this device moves quietly, runs quietly and has a long service life.
[0016] In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a stereogram of an embodiment of the present invention.
[0018] Figure 2 It is a top view of an embodiment of the present invention.
[0019] Figure 3 for Figure 2 Middle AA section view.
[0020] Figure 4 for Figure 2 Middle BB section view.
[0021] Figure 5 The schematic diagram of the structure of the conductive spring and the fourth conductive contact being disconnected from each other in an embodiment of the present invention.
[0022] In the figure: 1-valve body, 11-first conductive contact, 12-second conductive contact, 13-third conductive contact, 14-fourth conductive contact, 15-conductive spring, 16-upper cover, 17-middle cover, 18-lower cover, 2-first channel, 21-first connecting hole, 3-second channel, 31-second connecting hole, 4-third channel, 5-memory metal wire, 6-valve core, 61-spring, 62-sealing pad, 63-slot. DETAILED DESCRIPTION
[0023] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.
[0024] like Figure 1-4 As shown, a switch valve with a structure for protecting and controlling a memory alloy wire comprises: a valve body 1, a valve core 6 and a memory metal wire 5. The valve body 1 is formed by an upper cover 16, a middle cover 17 and a lower cover 18 which are fixedly connected in sequence, a sealing ring is further provided at the connection between the middle cover 17 and the lower cover 18, and the upper cover 16 and the lower cover 18 are fixedly connected by screws.
[0025] The valve body 1 has a first channel 2 , a second channel 3 and a third channel 4 . The first channel 2 has a first connecting hole 21 communicating with the third channel 4 . The second channel 3 has a second connecting hole 31 communicating with the third channel 4 .
[0026] The top of the valve body 1 has a first conductive contact 11, a second conductive contact 12, a third conductive contact 13 and a fourth conductive contact 14. The third conductive contact 13 is electrically connected to the first conductive contact 11, and the fourth conductive contact 14 is electrically connected to the second conductive contact 12. The third conductive contact 13 is fixedly electrically connected to a conductive spring 15, and one end of the conductive spring 15 always maintains an electrical connection with the fourth conductive contact 14 under the action of its own elastic force.
[0027] The valve core 6 is movably connected to the valve body 1, and the lower end of the valve core 6 is located in the third channel 4. The lower end of the valve core 6 is connected to a sealing gasket 62, and a spring 61 is sleeved on the upper end of the side wall of the valve core 6. Under the action of the spring 61, the valve core 6 always maintains a downward movement trend; the upper end of the valve core 6 is located directly below the conductive spring sheet 15.
[0028] The two ends of the memory metal wire 5 are electrically connected to the first conductive contact 11 and the second conductive contact 12 respectively. The memory metal wire 5, the first conductive contact 11, the second conductive contact 12, the third conductive contact 13, the fourth conductive contact 14, the conductive spring 15 and an external power supply together constitute a closed conductive circuit; the middle part of the memory metal wire 5 is connected to the valve core 6. After the memory metal wire 5 is powered on and heated, the memory metal wire 5 contracts and forces the valve core 6 to overcome the force of the spring and move upward.
[0029] In this embodiment, the side wall of the valve core 6 has a slot 63, and the memory metal wire 5 is embedded in the slot 63. The provision of the slot facilitates the installation and removal of the memory metal wire.
[0030] In this embodiment, two ends of the memory metal wire 5 are fastened to the first conductive contact 11 and the second conductive contact 12 respectively by screws.
[0031] In this embodiment, the first conductive contact 11 and the second conductive contact 12 are located on the left and right sides of the valve body 1, and the third conductive contact 13 and the fourth conductive contact 14 are located on the front and back sides of the valve body 1. The layout of the conductive contacts facilitates the arrangement of the conductive springs, avoids insufficient installation space, and further ensures that the conductive springs have sufficient displacement space.
[0032] This switch valve has the following working states: The external power supply is off and the memory wire is not powered. Figure 4 As shown, the valve core moves downward under the action of the spring until the sealing gasket seals the second connecting hole. At this time, the first channel is connected to the third channel, and one end of the conductive spring is electrically connected to the second conductive contact; When powered by an external power source, the memory wire is energized and heated. Figure 5 As shown, the memory wire gradually contracts and forces the valve core to move upward until the sealing gasket seals the first connecting hole, and the upper end of the valve core lifts the conductive spring sheet so that one end of the conductive spring sheet is disconnected from the electrical connection with the second conductive contact. At this time, the second channel is connected to the third channel, and the memory wire is powered off; after the power is off, the memory wire cools down and gradually returns to its original shape, and the force exerted by the deformation of the memory wire on the valve core gradually becomes smaller than the force exerted by the spring on the valve core, and the valve core gradually moves downward until one end of the conductive spring sheet recovers the electrical connection with the second conductive contact, and the memory wire is powered on and heated, and the memory wire gradually contracts and forces the valve core to move upward, so that the second channel and the third channel are always kept connected.
[0033] The memory wire is in a metal state with martensite properties at room temperature. When the memory wire is heated to a threshold of about 80°C, it transforms into an austenite structure. The length of the memory wire is shortened due to this transformation, and it can drive the valve core. The valve core continues to move until the conductive spring is pushed open, disconnecting the entire closed conductive circuit, and the memory wire is de-energized. The conductive spring is similar to a switch.
[0034] After the power is cut off, the memory metal wire slowly cools down and its length slowly increases. The force it exerts on the valve core gradually becomes smaller than the force exerted by the spring on the valve core. The valve core moves downward. Before the sealing gasket reaches the second connecting hole, the conductive spring is first electrically connected to the fourth conductive contact, and the conductive circuit is closed. The memory metal wire is energized again to generate heat and deform and shorten, and it pulls up the valve core again, and then repeats the above process.
[0035] The device can keep the valve core in this state (that is, the second channel and the third channel are always kept in a connected state). This state does not need to be controlled and protected by a circuit board and a program. A purely physical structure can achieve this function, thereby achieving a control and protection effect on the memory metal wire.
[0036] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.
Claims
1. A switch valve with a protection and control memory alloy wire structure, characterized in that: include: A valve body, wherein the valve body has a first channel, a second channel and a third channel, the first channel has a first connection hole connected to the third channel, and the second channel has a second connection hole connected to the third channel; the outer side wall of the valve body also has a first conductive contact and a second conductive contact, the first conductive contact is fixedly electrically connected to a conductive spring, and one end of the conductive spring always maintains electrical connection with the second conductive contact under the action of its own elastic force; A valve core, wherein the valve core is movably connected to the valve body, the lower end of the valve core is located in the third channel, the lower end of the valve core is connected to a sealing gasket, the upper end of the side wall of the valve core is sleeved with a spring, and the valve core always maintains a downward movement trend under the action of the spring; the upper end of the valve core is located directly below the conductive spring; A memory metal wire, wherein two ends of the memory metal wire are electrically connected to the first conductive contact and the second conductive contact respectively, and the memory metal wire, the first conductive contact, the second conductive contact, the conductive spring and an external power source together form a closed conductive loop; the middle portion of the memory metal wire is connected to the valve core, and after the memory metal wire is powered on and heated, the memory metal wire contracts to force the valve core to overcome the force of the spring and move upward; The switch valve has the following working states: When the external power supply is turned off and the memory wire is not energized, the valve core moves downward under the action of the spring until the sealing gasket seals the second connecting hole. At this time, the first channel is connected to the third channel, and one end of the conductive spring is electrically connected to the second conductive contact. An external power source is used to supply power, and the memory wire is energized and heated. The memory wire gradually contracts and forces the valve core to move upward until the sealing gasket seals the first connecting hole, and the upper end of the valve core lifts the conductive spring sheet so that one end of the conductive spring sheet is disconnected from the electrical connection with the second conductive contact. At this time, the second channel is connected to the third channel, and the memory wire is powered off; after the power is off, the memory wire cools down and gradually returns to its original shape. The force exerted by the deformation of the memory wire on the valve core is gradually less than the force exerted by the spring on the valve core, and the valve core gradually moves downward until one end of the conductive spring sheet recovers the electrical connection with the second conductive contact. The memory wire is energized and heated. The memory wire gradually contracts and forces the valve core to move upward, so that the second channel and the third channel always remain connected.
2. The switch valve with a protection and control memory alloy wire structure according to claim 1, characterized in that: The side wall of the valve core is provided with a slot, and the memory metal wire is embedded in the slot.
3. The switch valve with a protection and control memory alloy wire structure according to claim 1, characterized in that: Two ends of the memory metal wire are fastened to the first conductive contact and the second conductive contact respectively by screws.
4. The switch valve with a protection and control memory alloy wire structure according to claim 1, characterized in that: The valve body also has a third conductive contact and a fourth conductive contact, the third conductive contact is electrically connected to the first conductive contact, the fourth conductive contact is electrically connected to the second conductive contact, one end of the conductive spring is fixedly electrically connected to the third conductive contact, and the other end of the conductive spring is elastically electrically connected to the fourth conductive contact.
5. The switch valve with a protection and control memory alloy wire structure according to claim 4, characterized in that: The first conductive contact and the second conductive contact are located at left and right sides of the valve body, and the third conductive contact and the fourth conductive contact are located at front and back sides of the valve body.
6. The switch valve with a protection and control memory alloy wire structure according to claim 1, characterized in that: The valve body is formed by an upper cover, a middle cover and a lower cover which are fixedly connected in sequence.
7. The switch valve with a protection and control memory alloy wire structure according to claim 6, characterized in that: A sealing ring is also provided at the connection between the middle cover and the lower cover.
8. The switch valve with a protection and control memory alloy wire structure according to claim 6, characterized in that: The upper cover and the lower cover are fixedly connected by fasteners.
Citation Information
Patent Citations
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