A leak-proof valve disc and a two-position multi-way valve

Abstract

The present invention discloses a leak-proof movable valve plate and a two-position multi-way valve, relating to the technical field of connecting valves. The movable valve plate includes a valve plate body with a certain thickness. The valve body is in a cylindrical structure. Several through first communication holes are provided on the front surface of the valve body, and a sunken communication groove is provided on the back surface of the valve body. The two-position multi-way valve includes a rotating shaft, a valve body, a first positioning pin, a sealing gasket, a movable valve plate, a fixed valve plate and a fixed valve seat. The rotating shaft is arranged in the valve body and extends outward from one side of the valve body. The extending end of the rotating shaft is rotatably connected to the output shaft of the motor, and the other end of the rotating shaft is provided with a movable valve seat, and the movable valve plate is installed in the movable valve seat. The fixed valve plate is installed in the fixed valve seat, and the valve body is detachably and fixedly connected to the fixed valve seat. The present invention provides a movable valve plate that prevents liquid leakage by adopting a "hole-to-hole" connection method, and at the same time provides a two-position multi-way valve that can realize liquid inlet and sample mixing in one body.

Description

Technical Field

[0001] The present invention relates to the technical field of connecting valves, and particularly to a leak-proof moving valve plate and a two-position multi-way valve. Background Art

[0002] Multi-way valves can generally be divided into eight-way valves, ten-way valves, twelve-way valves, etc. according to the number of their holes. After installing a stepper motor, the valve position can be switched according to the control system to achieve the purpose of processing liquids. In traditional multi-way valves, the moving valve plate can generally rotate 360°. When the moving valve plate rotates to a certain angle, the flow channel on the moving valve plate communicates with the flow channel on the fixed valve plate to achieve the purpose of switching the sampling interface.

[0003] Most of the multi-way valves on the market now cannot achieve integration of sampling and mixing. Generally, only one kind of liquid can be sampled at the same time, making the processing of liquids less convenient and with low efficiency. Therefore, there is a need for a high-efficiency multi-way valve that can simultaneously achieve switching, sampling, and mixing.

[0004] At the same time, the moving valve plates used in multi-way valves in the prior art are generally designed with a connecting cavity or a connecting groove, and the adjacent two channels in the multi-way valve are directly connected through the connecting cavity or the connecting groove. This way of directly connecting two channels through the connecting cavity or the connecting groove, due to the "hole-to-groove" connection method, increases the gap at the contact position, and makes the liquid leak at the connection of the "hole-to-groove" when flowing.

[0005] The patent with the authorization announcement number: CN 101418865 B discloses a rotary integrated valve. In this patent, the fixed valve plate is divided into an upper fixed valve plate and a lower fixed valve plate, and a moving valve plate is arranged between the upper and lower fixed valve plates. The moving valve plate in it uses a directly penetrating through-hole, and a connecting groove is arranged on the lower fixed valve plate. The switching and connection of the channels on the upper and lower fixed valve plates are realized through the rotation of the moving valve plate. The main purpose of the moving valve plate in this device is to connect the switching of the channels between the upper and lower fixed valve plates, and does not realize the function of liquid reflux on the moving valve plate, that is, the liquid enters from the moving valve plate and exits from the moving valve plate.

[0006] The patent with the authorization announcement number: CN 202176761 U discloses a two-position multi-way valve. In this patent, a connecting cavity is arranged inside the moving valve plate (the valve core in this patent), and the connection of adjacent through-holes is realized through the rotation of the connecting cavity. Since the connecting cavity is arranged inside the moving valve plate, the process requirements in the production process are relatively high. At the same time, the through-hole and the connecting cavity are connected in the horizontal position, and there is no pressing device on both sides of the connection of the through-hole and the connecting cavity, making the connection of the through-hole and the connecting cavity prone to liquid leakage.

[0007] The patent with the authorization announcement number of CN 204828777 U discloses a two-position multi-way reversing valve. A communication groove is provided in the moving valve plate (the valve core in this patent), and adjacent two through holes are communicated through the communication groove. The direct adoption is the "hole-to-groove" communication method, which increases the gap at the connection, and makes the connection between the communication groove and the through hole prone to liquid leakage during use.

[0008] The patent with the authorization announcement number of CN 107940029 B discloses a two-position eight-way valve and an electric vehicle air conditioning system. The patent realizes the communication of different communication holes through the communication grooves (the grooves in this patent) spaced from each other on the moving valve plate (the sliding column in this patent), and realizes the communication between adjacent through holes by the up and down movement of the sliding column along the length direction of the sliding column. This method still adopts the "hole-to-groove" communication method and also has the problems in the above patent.

[0009] It can be known from the patents applied in different time periods above that there are two phenomena in the way of connecting the moving valve plate and the fixed valve plate in this industry: (1) The communication methods generally adopt the "hole-to-groove" or "hole-to-cavity" methods; (2) The communication positions are all in the axial direction of the moving valve plate (the diameter direction of the cross-section of the moving valve plate), rather than the radial direction of the moving valve plate (the direction perpendicular to the cross-section of the moving valve plate). This communication position cannot keep a pressing device added on both sides of the connection while being able to rotate, thus improving the tightness of the connection. The above two industry phenomena both make the liquid at the connection prone to leakage.

[0010] Therefore, to solve the above technical problems, a new technical solution needs to be proposed. In particular, a leak-proof moving valve plate for preventing liquid leakage and a two-position multi-way valve using the moving valve plate are provided. Summary of the Invention

[0011] The present invention provides a leak-proof moving valve plate for preventing liquid leakage and a two-position multi-way valve using the moving valve plate to solve the technical problems that the existing leak-proof moving valve plate in the market causes the multi-way valve to be prone to liquid leakage during use, and the existing multi-way valve cannot realize the simultaneous liquid inlet and mixing of multiple liquids.

[0012] To achieve the above object, the following technical solutions are provided: A leak-proof moving valve plate includes a valve plate body with a certain thickness. A first communication hole is provided through the valve plate body along the height direction of the valve plate body. The first communication holes are evenly distributed in a ring shape in the valve plate body, and the number of the first communication holes is an even number. One end of the valve plate body along the height direction of the valve plate body is provided with a communication groove. The communication groove has a structure sunken from the end plane of the valve plate body. The first communication hole is communicated with the adjacent first communication hole on one side through the communication groove.

[0013] Preferably, the valve plate body is cylindrical, the communication groove is in an arc shape, and the arc-shaped structure of the communication groove and the cross-sectional plane of the valve plate body share the same center of the circle; one end of the valve plate body where the communication groove is provided is also provided with a sealing gasket, and the sealing gasket is closely attached to the communication groove; the valve plate body is made of sapphire material, and the sealing gasket is made of a high-temperature resistant, corrosion-resistant, and flexible material.

[0014] Preferably, the number of the first communication holes is 8.

[0015] The present invention also provides a two-position multi-way valve containing the above-mentioned anti-leakage moving valve plate, which includes a valve body, a fixed valve seat, and a rotating shaft rotatably connected to the output shaft of the motor. The rotating shaft is arranged in the valve body and extends outward from one side of the valve body. The valve body is detachably and fixedly connected to the fixed valve seat. One end of the valve body is provided with an opening and the other end is provided with a through hole. A hollow rotating shaft accommodating cavity is arranged in the valve body, and an accommodating cavity wall is formed between the rotating shaft accommodating cavity and the outer surface of the valve body. Concave circular arc-shaped limiting grooves are symmetrically arranged on the accommodating cavity wall at the opening end of the valve body, and the radian of the limiting groove is N degrees. The rotating shaft includes a rotating rod and a moving valve seat fixedly connected to the rotating rod. A rotating limiting pin is arranged on the moving valve seat, and the rotating limiting pin is adapted to the limiting groove. The rotating shaft is arranged in the rotating shaft accommodating cavity and the rotating rod extends out from the through hole of the valve body. The moving valve plate is arranged in the moving valve seat. A hollow fixed valve plate accommodating cavity is arranged inside the fixed valve seat, and external liquid holes communicating with the fixed valve plate accommodating cavity are evenly distributed circumferentially on the side surface of the fixed valve seat. The present invention also includes a fixed valve plate with a certain thickness. A hole channel communicating with the external liquid hole is arranged on the fixed valve plate, and the hole channel is in close connection and communication with the first communication hole. The number of the first communication holes, the hole channels, and the external liquid holes is the same and is M, and they are all evenly distributed in a ring shape. M is an even number, and the relationship between M and N is that 360 divided by M is equal to N.

[0016] Preferably, a sealing gasket is further arranged between the moving valve plate and the moving valve seat, and the sealing gasket is made of a high-temperature resistant, corrosion-resistant, and flexible material.

[0017] Preferably, a deep groove ball bearing, a disc spring, a gasket, and a thrust ball bearing are sequentially arranged on the rotating shaft. The deep groove ball bearing is closely arranged behind the moving valve seat, and the deep groove ball bearing, the disc spring, and the thrust ball bearing are arranged in the rotating shaft accommodating cavity during installation.

[0018] Preferably, the hole channel includes a second communication hole and a third communication hole. The second communication hole is in close connection with the first communication hole, and the third communication hole is communicated with the external liquid hole; one end of the second communication hole extends to the upper surface of the fixed valve plate and the other end is connected to the third communication hole. The third communication hole is arranged inside the fixed valve plate and extends to the side surface of the fixed valve plate.

[0019] Preferably, the third communication hole includes an inner communication section and an outer communication section. The diameter of the outer communication section is larger than that of the inner communication section. The inner communication section communicates with the second communication hole, and the outer communication section communicates with the outer liquid hole.

[0020] Preferably, both the movable valve plate and the fixed valve plate are made of sapphire material.

[0021] Preferably, the valve body, the movable valve seat, the movable valve plate, the fixed valve plate, and the fixed valve seat are all cylindrical; the number M is 8, and the N is 45 degrees.

[0022] Advantages of the present invention:

[0023] (1) By means of "hole-to-hole", the through holes on the fixed valve plate communicate with the communication holes on the movable valve plate, and the communication return of the communication holes is realized through the communication groove arranged on the back of the movable valve plate, changing the traditional connection methods of "hole-to-groove" or "hole-to-cavity", reducing the gap at the connection, and thus reducing the possibility of liquid leakage.

[0024] (2) In addition, the "hole-to-hole" communication position is in the radial direction of the movable valve plate (the direction perpendicular to the cross-section of the movable valve plate). This method can add a pressing device at the rear side of the communication part, such as the disc spring and gasket devices in this two-position multi-way valve. This design method not only reduces the gap at the communication part, but also facilitates adding a pressing device on the side of the communication part, increasing the tightness of the communication part, enabling the movable valve plate and the fixed valve plate to be tightly pressed against each other even after wear occurs during long-term use, thereby reducing the possibility of liquid leakage during later use and extending the service life of the multi-way valve.

[0025] (3) Using sapphire material can be smoother and has the function of being wear-resistant during long-term rotation.

[0026] (4) The sealing gasket is closely attached above the communication groove to prevent the possibility of liquid leakage from the communication groove.

[0027] (5) The limiting groove can limit the rotation of the rotation limiting pin. When the rotation limiting pin is located at both ends of the limiting groove, they are two different states of this two-position multi-way valve. When in state one, the movable valve plate connects the pore channel on the fixed valve plate with the pore channel on the left / right side of this pore channel to achieve sample injection. When in state two, the movable valve plate connects the pore channel of the fixed valve plate with the pore channel on the right / left side of this pore channel, and at this time, sample mixing is realized. The same device realizes the integration of sample injection and mixing. When the pore channels adopt eight pore channels, the injection and mixing of four sample liquids can be simultaneously realized, improving the working efficiency.

[0028] (6) The movable valve plate has an arc-shaped communication groove on its back and is sealed with a corrosion-resistant soft material, which can reduce the gap when the movable valve plate and the fixed valve plate are in contact, greatly increasing the sealing performance of the multi-way valve and improving the accuracy of the multi-way valve.

[0029] (7) The movable valve plate and the fixed valve plate are made of sapphire material, which is not easy to wear and greatly improves the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0031] Figure 2 It is a schematic diagram of the internal structure of the present invention.

[0032] Figure 3 It is a schematic diagram of the structure of the valve body of the present invention.

[0033] Figure 4 It is a schematic diagram of the structure for limiting the rotation of the movable valve plate of the present invention.

[0034] Figure 5 It is a schematic diagram of the structure when the movable valve plate and the fixed valve plate of the present invention are engaged.

[0035] Figure 6 is Figure 5 A schematic diagram of the sectional structure along A-A.

[0036] Figure 7 It is the front view of the fixed valve plate of the present invention.

[0037] Figure 8 is Figure 7 A schematic diagram of the sectional structure along B-B.

[0038] Figure 9 It is the front view of the movable valve plate of the present invention.

[0039] Figure 10 It is the rear view of the movable valve plate of the present invention.

[0040] Figure 11 is Figure 10 A schematic diagram of the sectional structure along A-A.

[0041] Figure 12 is Figure 10 A schematic diagram of the sectional structure along B-B.

[0042] Figure 13 It is a schematic diagram of the structure in the use state at position 1 for filling two kinds of liquids of the present invention.

[0043] Figure 14 It is a schematic diagram of the structure in the use state at position 2 for filling two kinds of liquids of the present invention.

[0044] Figure 15It is a schematic structural diagram of the use state of position 1 for filling four liquids according to the present invention.

[0045] Figure 16 It is a schematic diagram of the structure of the use state of position 2 for filling four liquids of the present invention.

[0046] in:

[0047] 1. Rotating shaft; 10. Pin hole; 101. Motor rotating pin; 11. Thrust ball bearing; 12. Gasket; 13. Disc spring; 14. Deep groove ball bearing; 15. Moving valve seat; 151. Rotation limit pin; 2. Valve body; 21. Limit groove; 22. Rotating shaft accommodating chamber; 3. First positioning pin; 4. Sealing gasket; 5. Moving valve disc; 51. First communicating hole; 52. Connecting groove; 6. Fixed valve disc; 61. Second communicating hole; 62. Third communicating hole; 621. Inner through section; 622. Outer through section; 7. Fixed valve seat; 71. External liquid hole; 8. Second positioning pin. DETAILED DESCRIPTION

[0048] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0049] In the description of the present invention, it should be noted that terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" to indicate positions or locations are based on the positions or locations shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and are therefore not to be construed as limitations of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

[0050] In the description of the present invention, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on their specific circumstances.

[0051] like Figure 9 and Figure 10As shown in the figure, a leak-proof movable valve plate includes a valve plate body with a certain thickness, and the valve plate body is in a cylindrical structure. On the front surface of the valve plate body, several through first communication holes 51 are provided. On the back surface of the valve plate body, a concave communication groove 52 is provided, and the communication groove 52 connects the first communication hole 51 with another first communication hole 51 on the adjacent side. This leak-proof movable valve plate is preferably used as the movable valve plate of a rotary multi-way valve in a rotary multi-way valve assembly.

[0052] As Figure 11 shown in the figure, first communication holes 51 are provided through the valve plate body along the height direction of the valve plate body. The first communication holes 51 are evenly distributed in a circular ring shape in the valve plate body. The first communication holes 51 are even in number, and the number is not limited. Preferably, there are 8 first communication holes.

[0053] As Figure 12 shown in the figure, at one end of the valve plate body along the height direction of the valve plate body, a communication groove 52 is provided. The communication groove 52 is in a structure that is concave from the end plane of the valve plate body. The communication groove 52 is in an arc shape, and the arc-shaped structure of the communication groove 52 shares the same center of the circle with the cross-sectional plane of the valve plate body. The first communication hole 51 is connected to the first communication hole 51 on the adjacent side through the communication groove 52.

[0054] As Figure 2 shown in the figure, at the end of the valve plate body where the communication groove 52 is provided, a soft sealing gasket 4 ( Figures 9 to 12 not shown in the figure) is also provided. After the overall installation, the sealing gasket 4 can be closely attached to the communication groove 52 under the action of the rear pressing device. The pressing device is preferably a disc spring.

[0055] The connection groove of the movable valve plate is arranged on the back of the valve plate body, so that the movable valve plate and the fixed valve plate can be attached and connected in a hole-to-hole manner, reducing the contact gap at the connection and preventing liquid leakage. The valve plate body is made of sapphire material. On the one hand, when the movable valve plate is connected to the fixed valve plate, the smooth and close fit improves the accuracy of the movable valve plate and prevents liquid leakage at the connection. On the other hand, it is wear-resistant during rotation and improves the service life. The sealing gasket 4 is made of a soft material that is resistant to high temperature and corrosion. The material of the sealing gasket is preferably PTFE (polytetrafluoroethylene), which further increases the sealing performance.

[0056] As Figure 1 and Figure 2As shown in the figure, a two-position multi-way valve includes a rotating shaft 1, a valve body 2, a first positioning pin 3, a sealing gasket 4, a moving valve plate 5, a fixed valve plate 6, a fixed valve seat 7, and a second positioning pin 8. The rotating shaft 1 is arranged inside the valve body 2 and extends outward from one side of the valve body 2. The extended end of the rotating shaft 1 is rotatably connected to the output shaft of the motor (the motor rotating shaft drives the rotating shaft to rotate). The other end of the rotating shaft is provided with a moving valve seat 15, and the moving valve plate 5 is installed inside the moving valve seat 15. The fixed valve plate 6 is installed inside the fixed valve seat 7, and the valve body 2 is detachably and fixedly connected to the fixed valve seat 7. The moving valve plate 5 is tightly connected to the moving valve seat 15 through the first positioning pin 3, and the valve body 2 is tightly connected to the fixed valve seat 7 through the second positioning pin 8 to achieve preliminary fixation and is finally fixedly connected with a screw assembly.

[0057] By controlling the rotating shaft of the rotating shaft by the motor, the relative rotation of the moving valve plate and the fixed valve plate is realized, so that the moving valve body connects the pore channels on the fixed valve body with the pore channels on different sides of the pore channel, thereby realizing the functions of sample injection and sample mixing of this two-position multi-way valve.

[0058] As Figure 3 and Figure 4 shown, the valve body 2 is a cylindrical structure. One end of the valve body 2 is provided with an opening and the other end is provided with a through hole. A hollow rotating shaft accommodating cavity 22 is arranged inside the valve body 2, and an accommodating cavity wall is formed between the rotating shaft accommodating cavity 22 and the outer surface of the valve body 2. On the accommodating cavity wall at the opening end of the valve body, symmetrically arranged inwardly concave arc-shaped limiting grooves 21 are provided. The arc-shaped limiting grooves 21 share the same center of the circle with the cross-section of the cylinder of the valve body 2, and the two limiting grooves 21 are symmetrically arranged along the diameter direction of the cross-section circle of the cylinder. The radian of the limiting groove 21 is N degrees. If it is an eight-way valve, the radian of the limiting groove is 360 degrees divided by 8, which is 45 degrees. If it is a ten-way valve, the radian of the limiting groove is 360 degrees divided by 10, which is 36 degrees, and so on. In the present invention, an eight-way valve is preferably used.

[0059] As Figure 2 shown, the rotating shaft 1 includes a rotating rod and a moving valve seat 15 fixedly connected to the rotating rod. A rotating limiting pin 151 is provided on the moving valve seat 15, and the rotating limiting pin 151 is adapted to the limiting groove 21 provided on the valve body. As Figure 4 shown, the rotating limiting pin 151 can be rotated to both ends of the limiting groove 21 respectively, and each end of the limiting groove is a different working state of this two-position multi-way valve. The rotating shaft 1 is arranged inside the rotating shaft accommodating cavity 22 and the rotating rod extends out from the through hole of the valve body. The moving valve plate 5 is arranged inside the moving valve seat 15. A pin hole 10 is provided on the rotating rod of the rotating shaft extending out from the through hole, and a motor rotating pin 101 is inserted into the pin hole 10. Driven by the forward and reverse rotation of the motor, the rotating limiting pin 151 rotates, so as to switch between both ends of the limiting groove.

[0060] As Figure 2As shown, a deep groove ball bearing 14, a disc spring 13, a gasket 12 and a thrust ball bearing 11 are successively arranged on the rotating shaft 1. The deep groove ball bearing 14 is tightly arranged behind the moving valve seat 15. During installation, the deep groove ball bearing 14, the disc spring 13, the gasket 12 and the thrust ball bearing 11 are arranged in the rotating shaft accommodating cavity 22. The deep groove ball bearing 14, the disc spring 13 and the thrust ball bearing 11 respectively pass through the rotating rod of the rotating shaft and are successively arranged in the hollow rotating shaft accommodating cavity of the valve body. The deep groove ball bearing installed on the rotating shaft has a gap of only 0.02 - 0.03 mm between the deep groove ball bearing and the inner cavity of the valve body to ensure the perpendicularity between the rotating shaft and the fixed valve seat during rotation, thereby increasing the sealing performance of the plane fit between the valve plate and the fixed valve plate. Three disc springs are installed on the rotating shaft. After the valve body and the moving valve seat are fastened by hexagon socket head cap screws, the disc springs bear pressure. Even after the moving valve plate is worn after being used for a long time, the moving valve plate and the fixed valve plate can still be closely attached under the elastic force of the disc springs. A thrust ball bearing is installed at the uppermost end of the rotating shaft to reduce the frictional force between the valve body and the rotating shaft.

[0061] As Figure 2 and 4 shown, the moving valve plate 5 is fixedly connected to the moving valve seat 15 and is positioned by inserting a first positioning pin 3. One end of the moving valve plate provided with a first communication hole faces the opening of the valve body. On the one hand, the first positioning pin can ensure that the moving valve plate is fixed in the moving valve seat, and on the other hand, it can achieve quick installation and positioning to ensure that the hole channels of the moving valve plate and the fixed valve plate will not be misaligned after connection. During installation, a sealing gasket 4 made of a high-temperature and corrosion-resistant material with a thickness of 0.3 mm is added between the moving valve plate and the plane of the moving valve seat on the rotating shaft. After the valve body and the valve head (the fixed valve seat and the fixed valve plate assembled together are called the valve head) are fastened with screws, the sealing gasket can be closely attached to the side of the moving valve plate with an arc-shaped flow channel under the elastic force of the disc spring to achieve a sealing effect.

[0062] As Figure 2 shown, the fixed valve seat 7 is internally provided with a hollow fixed valve plate accommodating cavity. The side of the fixed valve seat 7 is evenly provided with external liquid holes 71 communicating with the fixed valve plate accommodating cavity in a circular ring shape. The number of the external liquid holes 71 is the same as the number of the first communication holes, preferably 8. The external liquid holes 71 penetrate from the inside of the fixed valve plate accommodating cavity to the side of the fixed valve seat 7. The external liquid holes 71 are communicated with the third communication holes 62 on the fixed valve plate 6.

[0063] As Figure 7 and Figure 8As shown, the fixed valve plate 6 is a cylindrical structure with a certain thickness. The fixed valve plate 6 is provided with a hole passage communicating with the outer liquid hole 71, and the hole passage is in fitting communication with the first communication hole 51. Any hole passage that can achieve the above functions is acceptable. In the present invention, preferably: the hole passage includes a second communication hole 61 and a third communication hole 62. The second communication hole 61 is in fitting connection with the first communication hole 51, and the third communication hole 62 is in communication with the outer liquid hole 71. One end of the second communication hole 61 extends to the upper surface of the fixed valve plate 6 and the other end is in communication with the third communication hole 62. The third communication hole 62 is arranged inside the fixed valve plate 6 and extends to the side surface of the fixed valve plate 6. The third communication hole 62 includes an inner through section 621 and an outer through section 622. The diameter of the outer through section 622 is larger than the diameter of the inner through section 621. The inner through section 621 is in communication with the second communication hole 61, and the outer through section 622 is in communication with the outer liquid hole 71. The diameters of the inner through sections of the first communication hole, the second communication hole and the third communication hole are the same. The second communication hole and the third communication hole are of an integral structure, and the third communication hole is arranged perpendicular to the second communication hole. The diameter of the outer through section of the third communication hole is larger than the diameter of the inner through section in order to make the diameter of the third communication hole match the diameter of the outer liquid hole, so that the device is tightly fitted and connected without liquid leakage. The fixed valve plate is tightly fitted and connected with the fixed valve seat through ball positioning, and the function of this ball positioning is the same as that of the first positioning pin.

[0064] As Figure 5 and Figure 6 shown, when the movable valve plate and the fixed valve plate are mutually fitted and cooperated, the first communication hole is connected with the second communication hole and is mutually communicated through the communication groove.

[0065] Both the movable valve plate 5 and the fixed valve plate 6 are made of sapphire material. On the one hand, it makes the smooth and tight fit when the movable valve plate and the fixed valve plate are connected to prevent liquid leakage at the connection. On the other hand, it is wear-resistant during the rotation process and improves the service life. The sealing gasket 4 is made of a soft material with high temperature resistance and corrosion resistance, further increasing the sealing performance and improving the accuracy of this two-position multi-way valve (preferably a two-position eight-way valve).

[0066] As Figures 13 to 16 shown are two typical application scenario diagrams of the present invention. The numbers of the first communication hole 51, the second communication hole 61, the third communication hole 62 and the outer liquid hole 71 are the same and are all M, and they are all arranged in a circumferential and uniform manner. M is an even number, and the relationship between M and N is that 360 divided by M is equal to N. In the present invention, the number of M is preferably eight for a two-position eight-way valve, and N is preferably 45 degrees.

[0067] Different from the traditional eight-way valve, this eight-way two-position valve can only rotate 45°. There is a 45° rotation limit design inside the valve body. A rotary positioning pin is installed on the rotating shaft, so that the rotating shaft cannot rotate anymore after rotating to a certain position and being blocked by the limit groove on the valve body. The control system can control the rotating shaft to rotate reversely by 45° to return to the original position. The rotating shaft can be swung clockwise and counterclockwise by an angle of 45° through the stepper motor and the control system.

[0068] As Figure 13 and 14 shown, positions 1 to 8 (a total of 8 interfaces) correspond to the external liquid input device and the external liquid storage device respectively. The arrow symbol in the digital direction indicates connection to the external input device, and the symbol with the arrow facing away from the digital direction indicates the liquid input to the external storage device. The following abbreviated liquid input refers to the liquid input to this external storage device, which is represented by the symbol with the arrow facing away from the digital direction. When only two liquids are extracted, sampling and mixing can be carried out simultaneously. When in position 1, liquid A is input at 1 and 3, and liquid B is input at 5 and 7. When rotated to position 2, 1 changes to input liquid B and mixes with the original liquid A, 5 changes to input liquid A and mixes with the original liquid B, 3 still inputs liquid A, and 7 still inputs liquid B. Taking a chromatograph as an example, after the detected liquid phase is sampled, through the 45° directional rotation design of the moving piece, mixing with the catalyst and discharging the liquid can be carried out while collecting, so as to react with the chromatographic column, greatly optimizing the detection steps and time of the liquid phase. And the two operating states can be switched at any time according to needs, which also plays a positive role in responding to the user's detection scheme.

[0069] As Figure 15 and 16As shown in the figure, positions 1 through 8 (a total of eight ports) correspond to external liquid input devices and external liquid storage devices, respectively. Arrows pointing in the direction of the number indicate connection to the external input device, while arrows pointing away from the number indicate liquid inflow into the external storage device. Hereinafter, "inflow" refers to the inflow into the external storage device, denoted by arrows pointing away from the number. This eight-way, two-position valve can simultaneously draw up to four samples for testing or simultaneously mix four liquids. For example, when this eight-way, two-position valve is used in water quality testing equipment, inlets 1, 3, 5, and 7 connect to the equipment's testing device, while inlets 2, 4, 6, and 8 can connect to water samples and reagents. In position 1, liquids A, B, C, and D can be simultaneously introduced. When moved to position 2, liquids AB, BC, CD, and AD can be mixed. Assuming that liquids A and C are two collected water samples, and liquids B and D are reagents that need to be mixed and reacted with the water samples, a certain proportion of water samples and reagents can be first extracted at position 1 and enter the four detection devices from interfaces 1, 3, 5, and 7. Then, move to position 2 and extract a certain proportion of water samples and reagents and enter the four detection devices from interfaces 1, 3, 5, and 7 again. In this way, water sample A is mixed with reagents B and D respectively and then tested, and water sample C is mixed with reagents B and D respectively and then tested. Therefore, 4 groups of data can be tested at the same time, which improves the efficiency of detection.

[0070] The present invention is a two-position multi-way valve that can collect and mix liquids. Currently, most chromatographs, water quality testers and medical equipment on the market use multi-way valves for collecting and mixing liquids.

[0071] The above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. Ordinary technicians in the relevant technical field may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions also fall within the scope of the present invention. The scope of patent protection of the present invention should be defined by the claims.

Claims

1. A two-position multi-way valve, including a leak-proof movable valve plate, the leak-proof movable valve plate includes a valve plate body with a certain thickness, and is characterized in that: A first communication hole (51) runs through the valve plate body in the height direction of the valve plate body. The first communication holes (51) are arranged in a ring shape evenly within the valve plate body. The number of the first communication holes (51) is an even number. One end of the valve plate body in the height direction of the valve plate body is provided with a communication groove (52). The communication groove (52) has a structure that is recessed from the end plane of the valve plate body. The first communication hole (51) is communicated with the adjacent first communication hole (51) on one side through the communication groove (52). The two-position multi-way valve further includes a valve body (2), a fixed valve seat (7), and a rotating shaft (1) rotatably connected to the output shaft of the motor. The rotating shaft (1) is arranged within the valve body (2) and extends outward from one side of the valve body (2). The valve body (2) is detachably and fixedly connected to the fixed valve seat (7). One end of the valve body (2) is provided with an opening and the other end is provided with a through hole. A hollow rotating shaft accommodating cavity (22) is arranged within the valve body (2). A accommodating cavity wall is formed between the rotating shaft accommodating cavity (22) and the outer surface of the valve body (2). Symmetrically arranged on the accommodating cavity wall at the opening end of the valve body are recessed arc-shaped limiting grooves (21). The radian of the limiting groove (21) is N degrees. The rotating shaft (1) includes a rotating rod and a moving valve seat (15) fixedly connected to the rotating rod. A rotating limiting pin (151) is arranged on the moving valve seat (15). The rotating limiting pin (151) is adapted to the limiting groove (21). The rotating shaft (1) is arranged within the rotating shaft accommodating cavity (22) and the rotating rod extends out from the through hole of the valve body. A moving valve plate (5) is arranged within the moving valve seat (15). A hollow fixed valve plate accommodating cavity is arranged within the fixed valve seat (7). Outer liquid holes (71) communicating with the fixed valve plate accommodating cavity are arranged in a ring shape evenly on the side surface of the fixed valve seat (7). It further includes a fixed valve plate (6) with a certain thickness. A hole passage communicating with the outer liquid hole (71) is arranged on the fixed valve plate (6). The hole passage is in fitting communication with the first communication hole (51). The number of the first communication holes (51), the hole passages, and the outer liquid holes (71) is the same, all being M, and they are all arranged in a ring shape evenly. M is an even number. The relationship between M and N is that 360 divided by M is equal to N.

2. The two-position multi-way valve according to claim 1, characterized in that: The valve plate body is in a cylindrical shape. The communication groove (52) has an arc-shaped structure. The arc-shaped structure of the communication groove (52) and the cross-sectional plane of the valve plate body share the same center of the circle. One end of the valve plate body provided with the communication groove (52) is further provided with a sealing gasket (4). The sealing gasket (4) is in close fit with the communication groove (52). The valve plate body is made of sapphire material. The sealing gasket (4) is made of a high-temperature resistant, corrosion resistant, and flexible material.

3. The two-position multi-way valve according to claim 2, characterized in that: The number of the first communication holes (51) is 8.

4. A two-position multi-way valve according to claim 1, characterized in that: A sealing gasket (4) is further arranged between the moving valve plate (5) and the moving valve seat (15). The sealing gasket (4) is made of a high-temperature resistant, corrosion resistant, and flexible material.

5. A two-position multi-way valve according to claim 1, characterized in that: A deep groove ball bearing (14), a disc spring (13), a gasket (12) and a thrust ball bearing (11) are sequentially arranged on the rotating shaft (1). The deep groove ball bearing (14) is tightly arranged behind the moving valve seat (15). When installed, the deep groove ball bearing (14), the disc spring (13) and the thrust ball bearing (11) are arranged in the rotating shaft accommodating cavity (22).

6. The two-position multi-way valve according to claim 1, characterized in that: The hole passage includes a second communication hole (61) and a third communication hole (62). The second communication hole (61) is in fit connection with the first communication hole (51), and the third communication hole (62) is communicated with the external liquid hole (71). One end of the second communication hole (61) extends to the upper surface of the fixed valve plate (6) and the other end is communicated with the third communication hole (62). The third communication hole (62) is arranged in the fixed valve plate (6) and extends to the side surface of the fixed valve plate (6).

7. The two-position multi-way valve according to claim 6, characterized in that: The third communication hole (62) includes an inner through section (621) and an outer through section (622). The diameter of the outer through section (622) is larger than that of the inner through section (621). The inner through section (621) is communicated with the second communication hole (61), and the outer through section (622) is communicated with the external liquid hole (71).

8. A two-position multi-way valve according to any one of claims 4 to 7, characterized in that: Both the moving valve plate (5) and the fixed valve plate (6) are made of sapphire material.

9. A two-position multi-way valve according to claim 8, characterized in that: The valve body (2), the moving valve seat (15), the moving valve plate (5), the fixed valve plate (6) and the fixed valve seat (7) are all cylindrical. The number M is 8, and the N is 45 degrees.

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