Linear motion two-position eight-way motorized valve and method of using same

Abstract

The application discloses a linear motion two-position eight-way electric valve and a use method thereof, which comprises a valve body, a valve connecting rod, a connecting pipe and a motor. A plurality of pipeline interfaces are arranged on the valve body at intervals, the pipeline interfaces are communicated with the connecting pipe, and the connecting pipe is connected to each pipeline outside. The valve connecting rod is arranged in the valve body and has an I-shaped structure. The linear motion of the valve connecting rod in the valve body changes the communication among the pipeline interfaces. One side of the valve body is provided with the motor, and the motor is connected with the valve connecting rod. The pipeline interfaces are provided with V1-V8 interfaces. When the motor drives the valve connecting rod to move to close the V7 interface, the V1 interface is communicated with the V5 interface, the V2 interface is communicated with the V6 interface, and the V3 interface is communicated with the V4 interface and the V8 interface. When the motor drives the valve connecting rod to move to close the V8 interface, the V3 interface is communicated with the V5 interface, the V4 interface is communicated with the V6 interface, and the V1 interface is communicated with the V2 interface and the V7 interface. The switching of multiple channels is realized by controlling the flow of eight valve positions.

Description

Technical Field

[0001] This invention belongs to the technical field of ventilation duct system, specifically relating to a linear motion two-position eight-way electric valve and its usage method. Background Technology

[0002] A two-position eight-way electric valve is a valve that can achieve two position states and eight channel switching, and is electrically driven.

[0003] Currently, the valves used in ventilation ducts are mostly two-position two-way valves or two-position three-way valves. However, for a specific ventilation duct system, a two-position eight-way electric valve is required that is suitable for vacuum environments and has high leakage rate requirements, enabling switching and connection of different channels. The two-position eight-way valve used in chromatography systems for trace gas detection mainly has a disc rotation switching structure, which is simple in logic, can only adapt to simple pipeline connection relationships, and has a relatively small diameter. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention proposes a linear motion two-position eight-way electric valve, comprising: a valve body, a valve rod, a connecting pipe, and a motor;

[0005] The valve body is provided with multiple pipe interfaces spaced apart, and the pipe interfaces are connected to connecting pipes, which are connected to various external pipes. The valve connecting rod is disposed inside the valve body. The valve connecting rod has an I-shaped structure and moves linearly within the valve body. The linear movement of the valve connecting rod within the valve body changes the connectivity between the pipe interfaces. A motor is provided on one side of the valve body and is connected to the valve connecting rod.

[0006] The pipeline has 8 interfaces, which are V1 to V8 interfaces respectively;

[0007] When the motor drives the valve linkage to close the V7 interface, the V1 interface connects to the V5 interface, the V2 interface connects to the V6 interface, and the V3 interface connects to the V4 interface and then to the V8 interface.

[0008] When the motor drives the valve linkage to the closed V8 interface, the V3 interface connects to the V5 interface, the V4 interface connects to the V6 interface, and the V1 interface connects to the V2 interface and then to the V7 interface.

[0009] Preferably, the valve body has a U-shaped structure, comprising: a first chamber, a second chamber, a third chamber, and a fourth chamber connected end to end in sequence;

[0010] The first cavity and the third cavity are two cavities located on two opposite sides of the U-shaped structure. The V7 interface is located on the first cavity, and the V8 interface is located on the third cavity. The second cavity and the fourth cavity are two cavities located on the other two opposite sides of the U-shaped structure. The V2 interface, V6 interface, and V4 interface are located on the second cavity, and the V2 interface, V6 interface, and V4 interface are arranged sequentially from the first cavity to the third cavity. The V1 interface, V5 interface, and V3 interface are located on the fourth cavity, and the V1 interface, V5 interface, and V3 interface are arranged sequentially from the first cavity to the third cavity.

[0011] The valve connecting rods are arranged in two symmetrical sets, with the two sets of valve connecting rods located in the second chamber and the fourth chamber, respectively.

[0012] When one end of each of the two sets of valve connecting rods moves close to the first cavity, one end of the I-shaped structure of the valve connecting rod closes the connection between the V7 interface and the V2 and V1 interfaces, and the other end of the I-shaped structure of one valve connecting rod closes the connection between the V6 and V4 interfaces, so that the V1 interface is connected to the V5 interface and the V4 interface is connected to the V8 interface; the other end of the I-shaped structure of the other valve connecting rod closes the connection between the V5 and V3 interfaces, so that the V2 interface is connected to the V6 interface and the V3 interface is connected to the V8 interface.

[0013] When one end of each of the two sets of valve connecting rods moves close to the third chamber, one end of the I-shaped structure of the valve connecting rod closes the connection between the V8 interface and the V4 and V3 interfaces. The other end of one of the I-shaped structures of the valve connecting rod closes the connection between the V2 and V6 interfaces, so that the V3 interface is connected to the V5 interface and the V2 interface is connected to the V7 interface. The other end of the I-shaped structure of the other valve connecting rod closes the connection between the V1 and V5 interfaces, so that the V4 interface is connected to the V6 interface and the V1 interface is connected to the V7 interface.

[0014] Preferably, each of the V1 to V8 interfaces is provided with an O-ring at the connection point with the external vents V1 to V8 respectively.

[0015] Preferably, both the V7 and V8 interfaces are connected to a vacuum environment, with the V7 interface connected to an external vacuum V7 and the V8 interface connected to an external vacuum V8.

[0016] The V2 interface is connected to the external vent V2, the V4 interface is connected to the external vent V4, and the V6 interface is connected to the external vent V6.

[0017] The V1 interface is connected to the external vent V1, the V5 interface is connected to the external vent V5, and the V3 interface is connected to the external vent V3.

[0018] Preferably, the V2 interface and the V4 interface are located in the horizontal direction of the second cavity, and the V6 interface is located in the vertical direction of the second cavity.

[0019] Preferably, the V1 interface and the V3 interface are located in the horizontal direction of the fourth cavity, and the V5 interface is located in the vertical direction of the fourth cavity.

[0020] Preferably, a connecting rod is provided at one end of the valve linkage near the V8 interface, and the two sets of valve linkages are controlled to move simultaneously through the connecting rod.

[0021] Preferably, the valve connecting rod includes: a valve stem tail guide shaft, a valve stem head guide shaft, a connecting rod, and a sealing valve;

[0022] The sealing valves are provided in two sets at intervals. The two sets of sealing valves are connected by the connecting rod to form an I-shaped structure. The two ends of the two sets of sealing valves away from the connecting rod are respectively connected to the valve stem tail guide shaft and the valve stem head guide shaft. The end of the valve stem tail guide shaft away from the sealing valve is connected to an external V7 interface, and the end of the valve stem head guide shaft away from the sealing valve is connected to the connecting rod.

[0023] Preferably, the sealing valve includes a valve core and a spring; two sets of valve cores are symmetrically arranged, and the two sets of valve cores are connected by the spring.

[0024] Based on the same inventive concept, the present invention also provides a method of using a linear motion two-position eight-way electric valve, including:

[0025] When gas exchange is required between the connecting pipes, the motor is started to drive the valve rod in the valve body to move linearly.

[0026] When the motor drives one end of the valve connecting rod to move to the V7 interface, the other end of the valve connecting rod is located between the V6 interface and the V4 interface and the V5 interface and the V3 interface. The V7 interface is closed, the V1 interface is connected to the V5 interface, the V2 interface is connected to the V6 interface, and the V3 interface is connected to the V4 interface to the V8 interface.

[0027] When the motor drives one end of the valve connecting rod to move to the V8 interface, the other end of the valve connecting rod is located between the V2 interface and the V6 interface and the connection between the V1 interface and the V3 interface. The V8 interface is closed, the V3 interface is connected to the V5 interface, the V4 interface is connected to the V6 interface, and the V1 interface is connected to the V2 interface to the V7 interface.

[0028] The electric valve is a two-position eight-way electric valve with linear motion, as described above.

[0029] Compared with the closest existing technology, the present invention has the following beneficial effects:

[0030] This invention provides a linear motion two-position eight-way electric valve and its usage method, comprising: a valve body, a valve rod, a connecting pipe, and a motor; the valve body is provided with multiple pipe interfaces spaced apart, the pipe interfaces communicating with the connecting pipe and connected to various external pipes through the connecting pipe; the valve rod is disposed inside the valve body, the valve rod having an I-shaped structure, the valve rod performing linear motion within the valve body, changing the connectivity between the pipe interfaces through the linear motion of the valve rod within the valve body; a motor is disposed on one side of the valve body, the motor being connected to the valve rod; the eight pipe interfaces are provided, the eight pipe interfaces being designated as V1 to V8; when the motor drives the valve rod to move to the closed V7 position... When the interfaces are connected, interfaces V1 and V5 are connected, interfaces V2 and V6 are connected, and interfaces V3 and V4 are connected to interface V8. When the motor drives the valve linkage to close interface V8, interfaces V3 and V5 are connected, interfaces V4 and V6 are connected, and interfaces V1 and V2 are connected to interface V7. Currently, the valves used in ventilation ducts are two-position two-way valves or two-position three-way valves. This invention designs a two-position eight-way electric valve suitable for vacuum environments and with high leakage rate requirements. It is used for switching between two channels in a ventilation duct. By controlling the flow of the eight valve positions, the airflow in the valve body can achieve the switching and connection of different channels, realizing the channel switching function. It has been tested and operated on the system. Attached Figure Description

[0031] Figure 1 A front view of a linear motion two-position eight-way electric valve provided by the present invention.

[0032] Figure 2 A schematic diagram illustrating the working principle of a linear motion two-position eight-way electric valve with the valve body in the closed V7 interface state, provided by the present invention.

[0033] Figure 3 A schematic diagram illustrating the working principle of a linear motion two-position eight-way electric valve with its valve body closed at the V8 port, provided by the present invention.

[0034] Figure 4 A schematic diagram of the interface definition for a linear motion two-position eight-way electric valve provided by the present invention;

[0035] Figure 5 This invention provides a side view of a linear motion two-position eight-way electric valve.

[0036] Figure 6 A schematic diagram of a linear motion two-position eight-way electric valve closing the V7 interface, provided by the present invention;

[0037] Figure 7 Force diagram at the intermediate transition position of a linear motion two-position eight-way electric valve provided by the present invention;

[0038] Figure 8 A schematic diagram of the closed V8 interface of a linear motion two-position eight-way electric valve provided by the present invention;

[0039] Among them, 1-KF40 flange, 2-O-ring, 3-Tie rod, 4-Nut, 5-Micro switch. Detailed Implementation

[0040] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0041] Example 1:

[0042] This invention provides, for example Figure 1 As shown, a linear motion two-position eight-way electric valve includes: a valve body, a valve rod, a connecting pipe, and a motor;

[0043] The valve body is provided with multiple pipe interfaces spaced apart, and the pipe interfaces are connected to connecting pipes, which are connected to various external pipes. The valve connecting rod is disposed inside the valve body. The valve connecting rod has an I-shaped structure and moves linearly within the valve body. The linear movement of the valve connecting rod within the valve body changes the connectivity between the pipe interfaces. A motor is provided on one side of the valve body and is connected to the valve connecting rod.

[0044] The pipeline has 8 interfaces, which are V1 to V8 interfaces respectively;

[0045] When the motor drives the valve linkage to close the V7 interface, the V1 interface connects to the V5 interface, the V2 interface connects to the V6 interface, and the V3 interface connects to the V4 interface and then to the V8 interface.

[0046] When the motor drives the valve linkage to the closed V8 interface, the V3 interface connects to the V5 interface, the V4 interface connects to the V6 interface, and the V1 interface connects to the V2 interface and then to the V7 interface.

[0047] A two-position eight-way electric valve is a functional component of a ventilation duct system, primarily used to control the flow of gas. The valve is electrically controlled; commands are sent from a host computer, and the controller drives the valve to move, enabling two-position eight-way switching and outputting valve position signals.

[0048] As its principle Figure 2As shown, when V7 is closed, V2 and V6 are connected, V1 and V5 are connected, and V3 and V4 are connected and lead to V8;

[0049] As its principle Figure 3 As shown, when V8 is closed, V4 and V6 are connected, V3 and V5 are connected, and V1 and V2 are connected and lead to V7.

[0050] Specifically, the valve body has a U-shaped structure, including: a first chamber, a second chamber, a third chamber, and a fourth chamber connected end to end in sequence;

[0051] The first cavity and the third cavity are two cavities located on two opposite sides of the U-shaped structure. The V7 interface is located on the first cavity, and the V8 interface is located on the third cavity. The second cavity and the fourth cavity are two cavities located on the other two opposite sides of the U-shaped structure. The V2 interface, V6 interface, and V4 interface are located on the second cavity, and the V2 interface, V6 interface, and V4 interface are arranged sequentially from the first cavity to the third cavity. The V1 interface, V5 interface, and V3 interface are located on the fourth cavity, and the V1 interface, V5 interface, and V3 interface are arranged sequentially from the first cavity to the third cavity.

[0052] The valve connecting rods are arranged in two symmetrical sets, with the two sets of valve connecting rods located in the second chamber and the fourth chamber, respectively.

[0053] When one end of each of the two sets of valve connecting rods moves close to the first cavity, one end of the I-shaped structure of the valve connecting rod closes the connection between the V7 interface and the V2 and V1 interfaces, and the other end of the I-shaped structure of one valve connecting rod closes the connection between the V6 and V4 interfaces, so that the V1 interface is connected to the V5 interface and the V4 interface is connected to the V8 interface; the other end of the I-shaped structure of the other valve connecting rod closes the connection between the V5 and V3 interfaces, so that the V2 interface is connected to the V6 interface and the V3 interface is connected to the V8 interface.

[0054] When one end of each of the two sets of valve connecting rods moves close to the third chamber, one end of the I-shaped structure of the valve connecting rod closes the connection between the V8 interface and the V4 and V3 interfaces. The other end of one of the I-shaped structures of the valve connecting rod closes the connection between the V2 and V6 interfaces, so that the V3 interface is connected to the V5 interface and the V2 interface is connected to the V7 interface. The other end of the I-shaped structure of the other valve connecting rod closes the connection between the V1 and V5 interfaces, so that the V4 interface is connected to the V6 interface and the V1 interface is connected to the V7 interface.

[0055] like Figure 4As shown, both the V7 and V8 interfaces are connected to a vacuum environment. The V7 interface is connected to an external vacuum V7, and the V8 interface is connected to an external vacuum V8.

[0056] The V2 interface is connected to the external vent V2, the V4 interface is connected to the external vent V4, and the V6 interface is connected to the external vent V6.

[0057] The V1 interface is connected to the external vent V1, the V5 interface is connected to the external vent V5, and the V3 interface is connected to the external vent V3.

[0058] The pipeline interface is connected to the external ventilation opening via KF40 flange 1.

[0059] Specifically, O-rings are provided at the connection points between the V1 to V8 interfaces and the external vents V1 to V8 respectively.

[0060] The two-position eight-way electric valve is placed in a vacuum environment. O-rings are added to the connections between the V1 to V8 interfaces and the external vents V1 to V8 respectively. This can improve the sealing performance of the two-position eight-way valve during gas exchange and flow, meet the requirements of high leakage rate, and enable the switching and connection of different channels.

[0061] like Figure 5 As shown, the V2 interface and the V4 interface are located in the horizontal direction of the second cavity, and the V6 interface is located in the vertical direction of the second cavity.

[0062] Specifically, the V1 interface and the V3 interface are located in the horizontal direction of the fourth cavity, and the V5 interface is located in the vertical direction of the fourth cavity.

[0063] Specifically, a connecting rod is provided at one end of the valve connecting rod near the V8 interface, and the two sets of valve connecting rods are controlled to move simultaneously through the connecting rod.

[0064] The two-position eight-way valve achieves linear movement and can be used in ventilation ducts. The valve port has a diameter of about 40mm, low flow resistance, and enables switching between two channels from one.

[0065] Specifically, the valve connecting rod includes: a valve stem tail guide shaft, a valve stem head guide shaft, a connecting rod, and a sealing valve;

[0066] The sealing valves are provided in two sets at intervals. The two sets of sealing valves are connected by the connecting rod to form an I-shaped structure. The two ends of the two sets of sealing valves away from the connecting rod are respectively connected to the valve stem tail guide shaft and the valve stem head guide shaft. The end of the valve stem tail guide shaft away from the sealing valve is connected to an external V7 interface, and the end of the valve stem head guide shaft away from the sealing valve is connected to the connecting rod.

[0067] The end of the valve stem head guide shaft away from the connecting rod is fixed by a horizontal tie rod 3. The horizontal tie rod 3 is fixed to the valve stem head guide shaft by a nut 4. The horizontal tie rod is connected to a motor, and the motor is controlled by a micro switch 5.

[0068] After the sealing valve moves to its position, the valve stem triggers the micro switch 5 at the corresponding position, which displays the open or closed status of the valve and controls the start or stop of the motor through feedback signal.

[0069] Specifically, the sealing valve includes a valve core and a spring; two sets of valve cores are symmetrically arranged, and the two sets of valve cores are connected by the spring.

[0070] The two-position eight-way electric valve is an electrically controlled valve. To improve the valve's sealing and reliability, a fungal seal is used at the valve seat.

[0071] Example 2:

[0072] Based on the same inventive concept, the present invention also provides a method of using a linear motion two-position eight-way electric valve, including:

[0073] When gas exchange is required between the connecting pipes, the motor is started to drive the valve rod in the valve body to move linearly.

[0074] When the motor drives one end of the valve connecting rod to move to the V7 interface, the other end of the valve connecting rod is located between the V6 interface and the V4 interface and the V5 interface and the V3 interface. The V7 interface is closed, the V1 interface is connected to the V5 interface, the V2 interface is connected to the V6 interface, and the V3 interface is connected to the V4 interface to the V8 interface.

[0075] When the motor drives one end of the valve connecting rod to move to the V8 interface, the other end of the valve connecting rod is located between the V2 interface and the V6 interface and the connection between the V1 interface and the V3 interface. The V8 interface is closed, the V3 interface is connected to the V5 interface, the V4 interface is connected to the V6 interface, and the V1 interface is connected to the V2 interface to the V7 interface.

[0076] Among them, the two-position eight-way electric valve.

[0077] Working status 1:

[0078] When the motor drives the valve core to move to the position... Figure 6 At the positions shown, V1 is connected to V5, V2 is connected to V6, and V3 is connected to V4 to V8;

[0079] Intermediate working state:

[0080] When the motor drives the valve core to move to the position... Figure 7 At the positions shown, the channels are not interconnected.

[0081] Working Status 2:

[0082] When the motor drives the valve core to move to the position... Figure 8 At the positions shown, V1 and V2 are connected to V7, V3 and V5 are connected, and V4 and V6 are connected.

[0083] When a two-position eight-way valve is in operation, it mainly has the above three position states, among which... Figure 6 During the process of moving from the indicated position to the middle position, it is necessary to satisfy (F 弹2 -F 压 The friction force is greater than that of the O-ring 2, which is located at the connection between the valve core and the connecting rod.

[0084] F 压 The force generated by the pressure difference between the working gas at atmospheric pressure and the vacuum; F 弹1 and F 弹2 Let F be the spring force in two positions. 弹1 Greater than F 弹2 ;F 摩 This refers to the dynamic friction force of O-ring 2 during the valve stem's movement.

[0085] If the sealing force required for the vulcanized part is F 密封力 Therefore F 弹2 >F 压 +F 摩 +F 密封力 Only in this way can the sealing performance be guaranteed.

[0086] The channel switching function has been implemented and is running on the system.

[0087] The external leakage rate, as determined by the leakage rate test, is no greater than 5 × 10⁻⁶. -5 Pa·m 3 / s. The internal leakage rate can be satisfied to be no greater than 1×10 - 4 Pa·m 3 / s.

[0088] The flow resistance test results show that when the ventilation volume is 750 L / min, the flow resistance is approximately in the range of 200 to 400 Pa.

[0089] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit its scope of protection. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that after reading the present invention, they can still make various changes, modifications or equivalent substitutions to the specific implementation methods of the application, but these changes, modifications or equivalent substitutions are all within the scope of protection of the claims pending approval.

Claims

1. A two-position eight-way electric valve with linear motion, characterized in that, include: Valve body, valve rod, connecting pipe and motor; The valve body is provided with multiple pipe interfaces spaced apart, and the pipe interfaces are connected to connecting pipes, which are connected to various external pipes. The valve connecting rod is disposed inside the valve body. The valve connecting rod has an I-shaped structure and moves linearly within the valve body. The linear movement of the valve connecting rod within the valve body changes the connectivity between the pipe interfaces. A motor is provided on one side of the valve body and is connected to the valve connecting rod. The pipeline has 8 interfaces, which are V1 to V8 interfaces respectively; When the motor drives the valve linkage to close the V7 interface, the V1 interface connects to the V5 interface, the V2 interface connects to the V6 interface, and the V3 interface connects to the V4 interface and then to the V8 interface. When the motor drives the valve linkage to close the V8 interface, the V3 interface connects to the V5 interface, the V4 interface connects to the V6 interface, and the V1 interface connects to the V2 interface and then to the V7 interface. The valve body has a U-shaped structure, including: a first chamber, a second chamber, a third chamber and a fourth chamber connected end to end in sequence; The first cavity and the third cavity are two cavities located on two opposite sides of the U-shaped structure. The V7 interface is located on the first cavity, and the V8 interface is located on the third cavity. The second cavity and the fourth cavity are two cavities located on the other two opposite sides of the U-shaped structure. The V2 interface, V6 interface, and V4 interface are located on the second cavity, and the V2 interface, V6 interface, and V4 interface are arranged sequentially from the first cavity to the third cavity. The V1 interface, V5 interface, and V3 interface are located on the fourth cavity, and the V1 interface, V5 interface, and V3 interface are arranged sequentially from the first cavity to the third cavity. The valve connecting rods are arranged in two symmetrical sets, with the two sets of valve connecting rods located in the second chamber and the fourth chamber, respectively. When one end of each of the two sets of valve connecting rods moves close to the first cavity, one end of the I-shaped structure of the valve connecting rod closes the connection between the V7 interface and the V2 and V1 interfaces, and the other end of the I-shaped structure of one valve connecting rod closes the connection between the V6 and V4 interfaces, so that the V1 interface is connected to the V5 interface and the V4 interface is connected to the V8 interface; the other end of the I-shaped structure of the other valve connecting rod closes the connection between the V5 and V3 interfaces, so that the V2 interface is connected to the V6 interface and the V3 interface is connected to the V8 interface. When one end of each of the two sets of valve connecting rods moves close to the third chamber, one end of the I-shaped structure of the valve connecting rod closes the connection between the V8 interface and the V4 and V3 interfaces. The other end of one of the I-shaped structures of the valve connecting rod closes the connection between the V2 and V6 interfaces, so that the V3 interface is connected to the V5 interface and the V2 interface is connected to the V7 interface. The other end of the I-shaped structure of the other valve connecting rod closes the connection between the V1 and V5 interfaces, so that the V4 interface is connected to the V6 interface and the V1 interface is connected to the V7 interface.

2. The linear motion two-position eight-way electric valve as described in claim 1, characterized in that, Both the V7 and V8 interfaces are connected to a vacuum environment. The V7 interface is connected to an external vacuum V7, and the V8 interface is connected to an external vacuum V8. The V2 interface is connected to the external vent V2, the V4 interface is connected to the external vent V4, and the V6 interface is connected to the external vent V6. The V1 interface is connected to the external vent V1, the V5 interface is connected to the external vent V5, and the V3 interface is connected to the external vent V3.

3. The linear motion two-position eight-way electric valve as described in claim 2, characterized in that, O-rings are provided at the connection points between the V1 to V8 interfaces and the external vents V1 to V8 respectively.

4. A two-position eight-way electric valve with linear motion as described in claim 2, characterized in that, The V2 interface and the V4 interface are located in the horizontal direction of the second cavity, and the V6 interface is located in the vertical direction of the second cavity.

5. A two-position eight-way electric valve with linear motion as described in claim 4, characterized in that, The V1 interface and the V3 interface are located in the horizontal direction of the fourth cavity, and the V5 interface is located in the vertical direction of the fourth cavity.

6. A two-position eight-way electric valve with linear motion as described in claim 1, characterized in that, The valve linkage has a connecting rod at one end near the V8 interface, and the two sets of valve linkages are controlled to move simultaneously through the connecting rod.

7. A two-position eight-way electric valve with linear motion as described in claim 6, characterized in that, The valve connecting rod includes: a valve stem tail guide shaft, a valve stem head guide shaft, a connecting rod, and a sealing valve; The sealing valves are provided in two sets at intervals. The two sets of sealing valves are connected by the connecting rod to form an I-shaped structure. The two ends of the two sets of sealing valves away from the connecting rod are respectively connected to the valve stem tail guide shaft and the valve stem head guide shaft. The end of the valve stem tail guide shaft away from the sealing valve is connected to an external V7 interface, and the end of the valve stem head guide shaft away from the sealing valve is connected to the connecting rod.

8. A linear motion two-position eight-way electric valve as described in claim 7, characterized in that, The sealing valve includes a valve core and a spring; two sets of valve cores are symmetrically arranged, and the two sets of valve cores are connected by the spring.

9. A method of using a linear motion two-position eight-way electric valve, characterized in that, include: When gas exchange is required between the connecting pipes, the motor is started to drive the valve rod in the valve body to move linearly. When the motor drives one end of the valve connecting rod to move to the V7 interface, the other end of the valve connecting rod is located between the V6 interface and the V4 interface and the V5 interface and the V3 interface. The V7 interface is closed, the V1 interface is connected to the V5 interface, the V2 interface is connected to the V6 interface, and the V3 interface is connected to the V4 interface to the V8 interface. When the motor drives one end of the valve connecting rod to move to the V8 interface, the other end of the valve connecting rod is located between the V2 interface and the V6 interface and the connection between the V1 interface and the V3 interface. The V8 interface is closed, the V3 interface is connected to the V5 interface, the V4 interface is connected to the V6 interface, and the V1 interface is connected to the V2 interface to the V7 interface. The electric valve is a two-position eight-way electric valve with linear motion as described in any one of claims 1-8.

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