Automatic switching valve and using method thereof

Abstract

The invention relates to the technical field of switching valves, in particular to an automatic switching valve and a using method thereof, and the automatic switching valve comprises a valve body, a valve core and an automatic switching mechanism; the valve body comprises an upper shell, a lower shell and two opening and closing mechanisms, the upper shell and the lower shell are arranged up and down, a supporting plate and a plurality of liquid outlet connecting pipes are arranged in the lower shell, and the opening and closing mechanisms are used for controlling the distance between the upper shell and the lower shell; a plurality of flow guide holes and a plurality of interception channels are formed in the valve element at equal intervals, the two ends of each flow guide hole extend to the upper shell and the lower shell respectively, the flow guide holes are connected with the liquid outlet connecting pipe, the interception channels correspond to the flow guide holes one to one, and the interception channels are perpendicular to and communicated with the flow guide holes. The plurality of automatic switching mechanisms are respectively arranged in the plurality of interception channels; the upper shell, the lower shell, the opening and closing mechanism, the valve element and the automatic switching mechanism are arranged, so that the valve element is disassembled, assembled and cleaned.

Description

Technical Field

[0001] The present invention relates to the technical field of switching valves, and in particular to an automatic switching valve, and in particular to a method for using the automatic switching valve. Background Art

[0002] Switching valves are widely used in mass spectrometry. As an important accessory in mass spectrometry instruments, switching valves can realize automatic switching of samples and improve analysis efficiency and accuracy. In multiple liquid phase mass spectrometry analysis technology, multiple independent liquid chromatography systems are connected to the mass spectrometer in sequence through switching valves, achieving efficient separation and detection of samples.

[0003] The patent with announcement number CN221054358U is a switching valve for a mass spectrometer, and its working principle is as follows: a sealing cover fixed in the valve body is rotatably connected to the rotating shaft, and when the first bevel gear rotates, it can drive the switching valve plate installed on the end of the rotating shaft to rotate, and the angle of the guide hole on the switching valve plate can be quickly adjusted to facilitate the switching of the flow path of the detected object and improve the mass spectrometry analysis efficiency of the detected object. Three connecting pipes are mounted on the first sealing cover. When the diverter plate fixed at the ends of the three connecting pipes is connected to the guide hole on the switching valve plate, multiple flow paths can be switched according to the flow direction of the detected object of the mass spectrometer. The sealing ring fixed in the guide hole improves the flow sealing performance of the detected object during switching. The elastic member used can firmly press the diverter plate against the surface of the switching valve plate to reduce the gap, further improve the sealing performance of the flow path switching, and avoid leakage.

[0004] The above patent still has the following problems:

[0005] 1. The transmission shaft penetrates from the outside of the valve body into the inside of the valve body and is connected to the second bevel gear. The first bevel gear is connected to the switching valve plate through the rotating shaft, so that the components used to switch the flow path of the test fluid are fixed inside the valve body, which is not convenient for cleaning these components;

[0006] 2. When switching the flow path of the detected object, the switching valve plate is rotated, and the overlapping part between the guide hole on the switching valve plate and the connecting pipe gradually decreases, and the change of the overlapping part is nonlinear. Before the connecting pipe is completely closed, the unit flow rate of the detected object cannot be controlled, which may easily lead to too much or too little detected object flowing out of the connecting pipe. Summary of the invention

[0007] In view of the above problems, an automatic switching valve is provided. The present invention is provided with an upper shell, a lower shell, an opening and closing mechanism, a valve core and an automatic switching mechanism, so as to realize the disassembly, assembly and cleaning of the valve core.

[0008] In order to solve the problems of the prior art, the present invention provides an automatic switching valve, comprising a valve body, a valve core and an automatic switching mechanism; the valve body comprises an upper shell, a lower shell and two opening and closing mechanisms, the upper shell and the lower shell are arranged up and down, a sealing cover plate is arranged at the upper end of the upper shell, a support plate is arranged inside the lower shell, a plurality of liquid outlet connecting pipes are arranged at equal intervals on the support plate, and the two opening and closing mechanisms are respectively arranged at both ends of the lower shell, and the opening and closing mechanisms are used to control the distance between the upper shell and the lower shell; the valve core is arranged between the upper shell and the lower shell, a plurality of guide holes and a plurality of intercepting channels are opened at equal intervals on the valve core, the two ends of the guide holes extend to the upper shell and the lower shell respectively, and the guide holes are connected to the liquid outlet connecting pipes, the plurality of intercepting channels correspond to the plurality of guide holes one by one, and the intercepting channels are perpendicular to and connected with the guide holes; there are a plurality of automatic switching mechanisms, and the plurality of automatic switching mechanisms are respectively arranged in the plurality of intercepting channels, and the automatic switching mechanisms are used to control the guide holes to participate in the guide.

[0009] Preferably, the automatic switching mechanism includes a mounting sleeve, two sealing structures and a driving mechanism; the mounting sleeve is arranged in the intercepting channel, the middle part of the mounting sleeve is connected to the guide hole, and the inner diameter of the mounting sleeve is larger than the inner diameter of the guide hole, and end cover plates are arranged at both ends of the mounting sleeve; the two sealing structures are respectively arranged at the two ends inside the mounting sleeve, the sealing structure includes a sealing block, a driving shaft, a limiting plate and a rebound structure, the outer diameter of the sealing block is the same as the inner diameter of the mounting sleeve, the driving shaft and the mounting sleeve are coaxially arranged, one end of the driving shaft is connected to the sealing block, and the other end of the driving shaft extends out of the end cover plate, the limiting plate is sleeved on the driving shaft, and the limiting plate is fixedly connected to the mounting sleeve, the rebound structure is arranged on one side of the limiting plate, and the rebound structure is used to apply a force on the driving shaft away from the middle of the valve core; the driving mechanism is arranged in the upper shell body, and the driving mechanism is used to drive the two sealing structures to move toward the middle of the valve core at the same time.

[0010] Preferably, the driving mechanism includes a rectangular box, a hanging plate, two first driving components, a lifting driving structure and two balancing guide structures; the rectangular box is arranged inside the upper shell body, and both ends of the rectangular box extend out of the upper shell body; the hanging plate is arranged inside the rectangular box, and both ends of the hanging plate extend out of the upper shell body; the two first driving components are respectively arranged at both ends of the hanging plate, and the first driving component includes a first wedge block and a second wedge block, the first wedge block is connected to the hanging plate, and the second wedge block is connected to the driving shaft; the lifting driving structure is arranged between the hanging plate and the rectangular box, and the lifting driving structure is used to drive the hanging plate to translate in the rectangular box; the two balancing guide structures are respectively arranged at both ends of the rectangular box, and the two balancing guide structures are used to keep the two ends of the hanging plate moving synchronously.

[0011] Preferably, the automatic switching mechanism further comprises a first sealing component, and the first sealing component is arranged between the two sealing blocks.

[0012] Preferably, the automatic switching mechanism further comprises two second sealing assemblies, and the two second sealing assemblies are respectively arranged on the opposite sides of the two sealing blocks.

[0013] Preferably, the automatic switching mechanism also includes two folding structures, which are respectively arranged at both ends of the hanging plate, and the folding structure includes a rectangular frame, a pressure rod, two rebound extrusion structures and two plug-in structures; the rectangular frame is fixed at one end of the hanging plate; one end of the pressure rod passes through the middle of the frame of the rectangular frame and penetrates into the interior of the rectangular frame; the two rebound extrusion structures are respectively arranged on both sides of the pressure rod, and the rebound extrusion structure is used to apply a force to the plug-in structure toward the middle of the rectangular frame; the two plug-in structures are respectively arranged at both ends of the rectangular frame, and the two plug-in structures are respectively connected to the two rebound extrusion structures.

[0014] Preferably, the automatic switching mechanism also includes two fixed structures, which correspond to the two folding structures respectively, and the fixed structures include a pull rod, a U-shaped fixing plate and a second connecting plate; the pull rod is arranged in parallel with the pressure rod, and a cross bar is arranged at one end of the pull rod, and the cross bar is perpendicular to the pull rod; the U-shaped fixing plate is fixed on the first wedge block, and a guide groove corresponding to the pull rod is opened on the U-shaped fixing plate; the two ends of the second connecting plate are respectively connected to the pull rod and the pressure rod.

[0015] Preferably, the opening and closing mechanism includes two connecting arm assemblies, two first moving blocks, an opening and closing drive assembly and a first guide structure; the two connecting arm assemblies are symmetrically arranged about the middle surface of the lower shell, and one end of the connecting arm assembly is axially connected to the lower shell; the two first moving blocks are respectively arranged at the same end of the two connecting arm assemblies, and the first moving blocks and the connecting arm assemblies are axially connected; the opening and closing drive assembly is arranged on the side wall of the upper shell, and the opening and closing drive assembly is used to drive the two first moving blocks to move closer to and away from each other; the first guide structure is arranged at one end of the lower shell, and the first guide structure guides the movement of the upper shell.

[0016] Preferably, the connecting arm assembly includes a first connecting arm, a second connecting arm and a first spring; one end of the first connecting arm is axially connected to the lower shell; one end of the second connecting arm is axially connected to the first movable block, and the other end of the second connecting arm and the other end of the first connecting arm are plugged into each other; the first spring is sleeved on the overlapping part of the first connecting arm and the second connecting arm, and the two ends of the first spring are respectively abutted against the end of the first connecting arm and the end of the second connecting arm.

[0017] A method for using an automatic switching valve comprises the following steps:

[0018] S1, the two opening and closing mechanisms adjust the distance between the upper shell and the lower shell so that the distance between the two matches the thickness of the valve core;

[0019] S2, placing the valve core on the lower housing, the two opening and closing mechanisms drive the upper housing to move smoothly toward the lower housing, the upper housing and the lower housing clamp and fix the valve core, and connect several liquid outlet connecting pipes in the lower housing to several guide holes;

[0020] S3, the automatic switching mechanism closes a number of guide holes, separates the upper shell and the lower shell, and injects the test sample into the upper shell;

[0021] S4, when one of the liquid outlet connecting tubes needs to guide the sample flow, the two sealing structures in the corresponding installation sleeve are simultaneously moved away from each other, so that the guide hole is opened.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The present invention is provided with an upper shell, a lower shell, an opening and closing mechanism, a valve core and an automatic switching mechanism. The opening and closing mechanism moves toward each other at a steady and uniform speed, thereby ensuring that the upper shell and the lower shell can be accurately aligned and clamp the valve core, thereby avoiding damage to the valve core or poor sealing due to excessive extrusion or misalignment, and ensuring the overall performance of the valve body. The automatic switching mechanism can quickly and accurately open or close the corresponding guide holes, thereby realizing rapid switching of multiple paths. The opening and closing mechanism drives the upper shell and the lower shell to separate smoothly and release the valve core, making it convenient for the staff to remove the valve core from the valve body for cleaning, thereby realizing the disassembly and cleaning of the valve core and preparing for the next use.

[0024] 2. The present invention is provided with an installation sleeve, a sealing structure and a driving mechanism. The second spring maintains a natural state in the initial state, provides an initial outward force for the sealing block, ensures the initial open state of the guide hole, and synchronously drives the two sealing blocks through the driving mechanism, which not only reduces the moving path required for a single sealing block to close and open the guide hole, but also significantly shortens the flow time of the test sample in the process of changing the diameter of the guide hole, which means that the amount of the test sample flowing into the liquid outlet connecting pipe under the uncontrollable flow state is greatly reduced, thereby improving the precise control of the release amount of the test sample.

[0025] 3. The present invention is provided with a hanging plate, a driving assembly, a lifting driving structure and a balancing guide structure. When the first wedge block contacts the second wedge block, the thrust generated by the wedge principle is used to effectively push the two sealing blocks to move toward each other on the middle surface of the mounting sleeve. The two balancing guide structures ensure the synchronization of both ends of the hanging plate during the movement through the cooperation of the guide rod and the third moving block, thereby ensuring that the two sealing blocks can move toward each other simultaneously and evenly, so that the two opposite surfaces of the two sealing blocks can move to the middle surface of the mounting sleeve at the same time, so that the two sealing blocks can be closely abutted. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a stereogram of an automatic switching valve.

[0027] Figure 2 It is the front view of an automatic switching valve.

[0028] Figure 3 yes Figure 2 Stereoscopic cross-sectional view at AA in the middle.

[0029] Figure 4 The present invention is a stereoscopic diagram of an automatic switching mechanism in an automatic switching valve.

[0030] Figure 5 The present invention is a stereoscopic diagram of a sealing structure, a first sealing component and a second sealing component in an automatic switching valve.

[0031] Figure 6 The invention is a stereoscopic diagram of a drive shaft, a lifting plate, a drive assembly, a lifting drive structure and a balance guide structure in an automatic switching valve.

[0032] Figure 7 The invention is a stereoscopic diagram of a sealing block and a first sealing ring in an automatic switching valve.

[0033] Figure 8 The present invention is a stereoscopic diagram of a sealing block, a drive shaft, a limit plate and a second sealing component in an automatic switching valve.

[0034] Fig. 9 The invention discloses a stereoscopic diagram of a lifting plate, a first wedge block, a folding structure and a fixing structure in an automatic switching valve.

[0035] Fig.10 The present invention is a stereoscopic diagram of a first wedge block, a folding structure and a fixed structure in an automatic switching valve.

[0036] Fig.11 It is a three-dimensional diagram of the opening and closing mechanism in an automatic switching valve.

[0037] Fig.12 It is a stereoscopic view of a connecting arm assembly in an automatic switching valve.

[0038] The numbers in the figure are: 1, valve body; 11, upper shell; 111, sealing cover plate; 1111, feed port; 12, lower shell; 121, support plate; 122, liquid outlet connecting pipe; 13, opening and closing mechanism; 131, connecting arm assembly; 1311, first connecting arm; 1312, second connecting arm; 1313, first spring; 132, first moving block; 133, opening and closing drive assembly; 134, first guide structure; 1341, first Cover body; 1342, second cover body; 1343, telescopic connecting column; 2, valve core; 21, guide hole; 22, interception channel; 3, automatic switching mechanism; 31, installation sleeve; 311, end cover plate; 32, sealing structure; 321, sealing block; 322, driving shaft; 323, limit plate; 324, rebound structure; 3241, fixing ring; 3242, second spring; 33, driving mechanism; 331, rectangular box; 332, lifting plate; 333, first driving assembly; 3331, first wedge block; 3332, second wedge block; 334, lifting driving structure; 3341, guide beam; 3342, second moving block; 3343, first driving plate; 335, balance guide structure; 3351, guide rod; 3352, third moving block; 34, first sealing assembly; 341, first sealing ring; 35, second sealing assembly; 351, second sealing ring; 35 2. The third spring; 36. The folding structure; 361. The rectangular frame; 362. The pressure rod; 363. The rebound extrusion structure; 3631. The telescopic rod; 3632. The fourth spring; 3633. The second drive plate; 364. The plug-in structure; 3641. The plug-in rod; 3642. The first connecting plate; 37. The fixing structure; 371. The pull rod; 3711. The cross bar; 372. The U-shaped fixing plate; 3721. The guide groove; 373. The second connecting plate. DETAILED DESCRIPTION

[0039] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0040] Reference Figures 1 to 12As shown: an automatic switching valve, including a valve body 1, a valve core 2 and an automatic switching mechanism 3; the valve body 1 includes an upper shell 11, a lower shell 12 and two opening and closing mechanisms 13, the upper shell 11 and the lower shell 12 are arranged up and down, the upper end of the upper shell 11 is provided with a sealing cover plate 111, the sealing cover plate 111 is provided with a feed port 1111, the lower shell 12 is provided with a support plate 121 inside, and a plurality of liquid outlet connecting pipes 122 are arranged on the support plate 121 at equal intervals, and the two opening and closing mechanisms 13 are respectively arranged at both ends of the lower shell 12, and the opening and closing mechanisms 13 are used to control the distance between the upper shell 11 and the lower shell 12, and the lower end surface of the upper shell 11 and The upper end surface of the lower shell 12 is provided with a sealing strip; the valve core 2 is arranged between the upper shell 11 and the lower shell 12, and a plurality of guide holes 21 and a plurality of interception channels 22 are opened on the valve core 2 at equal intervals, and the two ends of the guide holes 21 extend to the upper shell 11 and the lower shell 12 respectively, and the guide holes 21 are connected to the liquid outlet connecting pipe 122, and the plurality of interception channels 22 correspond to the plurality of guide holes 21 one by one, and the interception channels 22 are perpendicular to and connected with the guide holes 21; there are a plurality of automatic switching mechanisms 3, and the plurality of automatic switching mechanisms 3 are respectively arranged in the plurality of interception channels 22, and the automatic switching mechanisms 3 are used to control the guide holes 21 to participate in the guide.

[0041] First, the staff will accurately place the cleaned valve core 2 between the assembled upper shell 11 and lower shell 12. The upper shell 11 and the lower shell 12 are preset at a certain distance through the opening and closing mechanism 13 to ensure that the valve core 2 can be installed smoothly and not squeezed. Then, the two opening and closing mechanisms 13 are started at the same time, moving toward each other at a steady and uniform speed, driving the upper shell 11 and the lower shell 12 to gradually approach and finally clamp the valve core 2. In this process, the sealing strips on the end faces of the upper shell 11 and the lower shell 12 are effectively compressed to form a tight fit, which greatly enhances the overall sealing performance of the valve body 1 and ensures that there is no liquid leakage during subsequent operations. The default state of all automatic switching mechanisms 3 is to close the corresponding guide holes 21, that is, the valves in the interception channel 22 are in a closed state. At this time, the entire valve body 1 is in a standby state, ready to go. The test sample is received and injected through the feed port 1111 at the top of the upper shell 11 to fill the interior of the upper shell 11. When mass spectrometry analysis is required, the corresponding automatic switching mechanism 3 quickly and accurately opens the corresponding guide hole 21, allowing the test sample to enter the liquid outlet connecting pipe 122 in the lower shell 12 through the guide hole 21, and then flow to the subsequent mass spectrometry analysis equipment. Since each automatic switching mechanism 3 independently controls a guide hole 21, rapid switching of multiple paths can be achieved, which greatly improves the efficiency and flexibility of mass spectrometry analysis. After the analysis is completed, the opening and closing mechanism 13 is started again to smoothly separate the upper shell 11 and the lower shell 12, releasing the valve core 2, so that the staff can remove the valve core 2 from the valve body 1 for cleaning, thereby realizing the disassembly and cleaning of the valve core 2 and preparing for the next use.

[0042] Reference Figure 3 , Figure 4 and Figure 5 As shown: the automatic switching mechanism 3 includes a mounting sleeve 31, two sealing structures 32 and a driving mechanism 33; the mounting sleeve 31 is arranged in the intercepting channel 22, the middle part of the mounting sleeve 31 is connected to the guide hole 21, and the inner diameter of the mounting sleeve 31 is larger than the inner diameter of the guide hole 21, and both ends of the mounting sleeve 31 are provided with end cover plates 311; the two sealing structures 32 are respectively arranged at the two ends inside the mounting sleeve 31, and the sealing structure 32 includes a sealing block 321, a driving shaft 322, a limiting plate 323 and a rebound structure 324, the outer diameter of the sealing block 321 is the same as the inner diameter of the mounting sleeve 31, the driving shaft 322 and the mounting sleeve 31 are coaxially arranged, one end of the driving shaft 322 is connected to the sealing block 321, and the other end of the driving shaft 322 is connected to the sealing block 321. An end cover plate 311 extends from one end, a limit plate 323 is sleeved on the drive shaft 322, and the limit plate 323 is fixedly connected to the mounting sleeve 31, a rebound structure 324 is arranged on one side of the limit plate 323, and the rebound structure 324 is used to apply a force away from the middle of the valve core 2 to the drive shaft 322, and the rebound structure 324 includes a fixing ring 3241 and a second spring 3242, the fixing ring 3241 is fixed on the drive shaft 322, the second spring 3242 is sleeved on the drive shaft 322, and the two ends of the second spring 3242 are respectively abutted against the fixing ring 3241 and the limit plate 323; a driving mechanism 33 is arranged in the upper shell 11, and the driving mechanism 33 is used to drive the two sealing structures 32 to move toward the middle of the valve core 2 at the same time.

[0043] Initially, the second spring 3242 is in a natural state, exerting an outward force on the drive shaft 322 to move the sealing block 321 away from the center of the installation sleeve 31. The spacing between the two sealing blocks 321 is large enough to ensure that the guide hole 21 is fully open and the fluid can pass freely. When the valve core 2 is installed in the valve body 1, all automatic switching mechanisms 3 work, and the driving mechanism 33 simultaneously drives the two driving shafts 322 to move toward the center of the installation sleeve 31. As the driving shaft 322 moves, the two sealing blocks 321 gradually move toward the center of the installation sleeve 31. The second spring 3242 is compressed in this process, storing elastic potential energy and providing necessary resistance to ensure the smooth progress of the sealing process. When the two sealing blocks 321 are in contact with each other When they abut against each other, the flow guide hole 21 is closed to prevent the flow of the test sample. If the flow guide hole 21 needs to be opened, the driving mechanism 33 works in the reverse direction, and the driving shaft 322 returns to the initial position under the action of the rebound structure 324. The sealing block 321 then moves away from the center of the mounting sleeve 31 to restore the open state of the flow guide hole 21. By synchronously driving the two sealing blocks 321, the moving path required for a single sealing block 321 to close and open the flow guide hole 21 is reduced, and the response time is significantly shortened. The rapid movement of the sealing block 321 reduces the flow time of the test sample in the process of the flow guide hole 21 changing its diameter, and reduces the amount of the test sample flowing into the liquid outlet connecting pipe 122 when the flow is uncontrollable, thereby improving the precise control of the release amount of the test sample.

[0044] Reference Figure 3 , Figure 4 river Figure 6As shown in the figure, the driving mechanism 33 includes a rectangular box 331, a hanging plate 332, two first driving components 333, a lifting driving structure 334 and two balancing guide structures 335; the rectangular box 331 is arranged inside the upper shell 11, and both ends of the rectangular box 331 extend out of the upper shell 11; the hanging plate 332 is arranged inside the rectangular box 331, and both ends of the hanging plate 332 extend out of the upper shell 11; the two first driving components 333 are respectively arranged on both ends of the hanging plate 332. The first driving assembly 333 includes a first wedge block 3331 and a second wedge block 3332. The first wedge block 3331 is connected to the hanging plate 332, and the second wedge block 3332 is connected to the driving shaft 322. The inclined surface of the first wedge block 3331 corresponds to the inclined surface of the second wedge block 3332. The lifting driving structure 334 is arranged between the hanging plate 332 and the rectangular box 331. The lifting driving structure 334 is used to drive the hanging plate 332 to translate in the rectangular box 331. The descending drive structure 334 includes a guide beam 3341, a second moving block 3342 and a first driving plate 3343. The guide beam 3341 is connected to the rectangular box 331, and the guide beam 3341 is parallel to the intercepting channel 22. The second moving block 3342 is slidably set on the guide beam 3341. The two ends of the first driving plate 3343 are respectively hinged to the second moving block 3342 and the middle part of the hanging plate 332; two balancing guide structures 335 are respectively arranged at the two ends of the rectangular box 331. The two balancing guide structures 335 are used to keep the two ends of the hanging plate 332 moving synchronously. The balancing guide structure 335 includes two guide rods 3351 and two third moving blocks 3352. The two guide rods 3351 are respectively arranged on both sides of the hanging plate 332, and the guide rods 3351 are perpendicular to the hanging plate 332. The two third moving blocks 3352 are respectively slidably set on the two guide rods 3351, and the third moving blocks 3352 are fixedly connected to the hanging plate 332.

[0045] When the valve core 2 is installed in the valve body 1, the hanging plate 332 and the first wedge block 3331 thereon are in the initial position, the second wedge block 3332 is connected to the driving shaft 322 for lifting, the lifting driving structure 334 is started, and the second moving block 3342 begins to slide on the guide beam 3341, and moves from the end of the guide beam 3341 toward the middle. With the movement of the second moving block 3342, force is transmitted through the middle hinge point of the first driving plate 3343 and the hanging plate 332, so that the hanging plate 332 is smoothly translated downward in the rectangular box 331, and the hanging plate 332 drives the two first wedge blocks 3331 to move toward the two second wedge blocks 3332 respectively. Since the first wedge block 3331 is only It can move in the direction of the lifting plate 332. When the two inclined surfaces are in contact, according to the wedge principle, the first wedge block 3331 applies a thrust to the second wedge block 3332 toward the middle direction of the mounting sleeve 31. The two balancing guide structures 335 play a key role in this process. Through the cooperation of the guide rod 3351 and the third moving block 3352, it is ensured that the two ends of the lifting plate 332 remain synchronized during the movement, which effectively prevents the lifting plate 332 from tilting or twisting, thereby ensuring that the two sealing blocks 321 can move toward each other simultaneously and evenly, so that the two opposite surfaces of the two sealing blocks 321 can move to the middle surface of the mounting sleeve 31 at the same time, so that the two sealing blocks 321 can be tightly abutted.

[0046] Reference Figure 3 , Figure 5 and Figure 7 As shown: the automatic switching mechanism 3 also includes a first sealing component 34, which is arranged between the two sealing blocks 321. The first sealing component 34 includes two first sealing rings 341. The two opposite sides of the two sealing blocks 321 are both provided with annular grooves for placing the first sealing rings 341, and the two first sealing rings 341 are respectively arranged in the two annular grooves.

[0047] In order to prevent the test sample from flowing out from between the two abutting surfaces of the two sealing blocks 321, the two abutting surfaces of the two sealing blocks 321 require higher processing accuracy, and the abutting surfaces need to be kept clean during use. By setting the first sealing component 34, when the two sealing blocks 321 are completely abutted, the two first sealing rings 341 also press against each other. This pressing occurs not only between the two first sealing rings 341, but also between the outer wall of the first sealing ring 341 and the inner wall of the mounting sleeve 31, forming a multiple sealing structure 32. With the further compression and deformation of the first sealing ring 341, the two first sealing rings 341 effectively fill the tiny gaps between the sealing blocks 321 and the sealing blocks 321 and between the sealing blocks 321 and the mounting sleeve 31, thereby ensuring that both the sealing blocks 321 and the sealing blocks 321 and the sealing blocks 321 and the mounting sleeve 31 are in a strictly sealed state, effectively preventing leakage of the test sample.

[0048] Reference Figure 3 , Figure 5 and Figure 8 As shown: the automatic switching mechanism 3 also includes two second sealing assemblies 35, and the two second sealing assemblies 35 are respectively arranged on the side away from the two sealing blocks 321, and the second sealing assembly 35 includes a second sealing ring 351 and a third spring 352. The outer diameter of the second sealing ring 351 is the same as the inner diameter of the mounting sleeve 31, and the third spring 352 is sleeved on the driving shaft 322, and the two ends of the third spring 352 are respectively abutted against the second sealing ring 351 and the limit plate 323.

[0049] The two first sealing rings 341 cannot completely close the guide hole 21. The test sample may contact the side of the sealing block 321 and try to flow in from the gap between the side wall and the inner wall of the mounting sleeve 31. By setting the second sealing structure 32, the outer diameter of the second sealing ring 351 matches the inner diameter of the mounting sleeve 31 to ensure good sealing. The third spring 352 is sleeved on the driving shaft 322. The two ends of the third spring 352 are respectively connected to the second sealing ring 351 and the limit plate 323 to maintain a certain pre-tightening force. When the sealing block 321 is in the action of the driving shaft 322, the second sealing ring 351 is in the action of the second sealing ring 351 and the limit plate 323 to ensure good sealing. When starting to move, the sealing block 321 drives the second sealing ring 351 to move, and the third spring 352 always applies a force on the second sealing ring 351 in the direction of the sealing block 321. This force not only helps to maintain the close contact between the second sealing ring 351 and the sealing block 321, but also overcomes the friction between the second sealing ring 351 and the inner wall of the mounting sleeve 31, preventing the second sealing ring 351 from accidentally detaching from the sealing block 321 during the movement, thereby ensuring that the test sample cannot flow out from any gap between the sealing block 321 and the mounting sleeve 31.

[0050] Reference Figure 4 , Fig. 9 and Fig.10As shown: the automatic switching mechanism 3 also includes two folding structures 36, which are respectively arranged at both ends of the hanging plate 332, and the folding structure 36 includes a rectangular frame 361, a pressure rod 362, two rebound extrusion structures 363 and two plug-in structures 364; the rectangular frame 361 is fixed to one end of the hanging plate 332; one end of the pressure rod 362 passes through the middle of the frame of the rectangular frame 361 and penetrates into the interior of the rectangular frame 361; the two rebound extrusion structures 363 are respectively arranged on both sides of the pressure rod 362, and the rebound extrusion structure 363 is used to apply a force toward the middle of the rectangular frame 361 to the plug-in structure 364, and the rebound extrusion structure 363 includes a telescopic rod 3631, a fourth spring 3632 and a second driving plate 3633, one end of the telescopic rod 3631 extends out of the rectangular frame 361 from the middle of the rectangular frame 361, and the fourth spring 3632 is sleeved On the telescopic rod 3631, two ends of the fourth spring 3632 are respectively abutted against the end of the telescopic rod 3631 and the inner wall of the rectangular frame 361, and two ends of the second driving plate 3633 are respectively hinged to the end of the telescopic rod 3631 and the end of the pressure rod 362; two plug-in structures 364 are respectively arranged at the two ends of the rectangular frame 361, and the two plug-in structures 364 are respectively connected to the two rebound extrusion structures 363, and the plug-in structure 364 includes a first connecting plate 3642 and an insertion rod 3641, one end of the first connecting plate 3642 is connected to the telescopic rod 3631, one end of the insertion rod 3641 is connected to the first connecting plate 3642, and the other end of the insertion rod 3641 faces the middle of the rectangular frame 361, the first wedge block 3331 and the hanging plate 332 are connected by a hinge, and the two side surfaces of the first wedge block 3331 are provided with insertion holes corresponding to the insertion rod 3641.

[0051] When the lowest point of the first wedge block 3331 is lower than the lower end of the upper shell 11, the first wedge block 3331 may interfere with the process of installing the valve core 2 into the valve body 1. By setting the two folding structures 36, when installing the valve core 2, the staff applies a force toward the middle of the rectangular frame 361 to the pressure rod 362, and the pressure rod 362 moves toward the middle of the rectangular frame 361. The pressure rod 362 pushes the two telescopic rods 3631 to move toward the outside of the rectangular frame 361 through the two second driving plates 3633. The two fourth springs 3632 are compressed, and the two telescopic rods 3631 simultaneously drive the two insertion rods 3641 to move away from each other, so that the two insertion rods 3641 The shortest distance between them meets the width of the first wedge block 3331, and then the first wedge block 3331 is rotated upward so that the sockets on the two sides of the first wedge block 3331 correspond to the two plug rods 3641 respectively. Then the staff releases the force on the pressure rod 362, and the two fourth springs 3632 rebound. The fourth spring 3632 pushes the telescopic rod 3631 to move toward the middle of the rectangular frame 361, and the telescopic rod 3631 drives the plug rod 3641 to be inserted into the socket through the first connecting plate 3642, so that the lower end of the first wedge block 3331 is higher than the lower end of the upper shell body 11, thereby avoiding the first wedge block 3331 from interfering with the installation of the valve core 2.

[0052] Reference Figure 4 , Fig. 9 and Fig.10 As shown: the automatic switching mechanism 3 also includes two fixed structures 37, the two fixed structures 37 correspond to the two folding structures 36 respectively, the fixed structure 37 includes a pull rod 371, a U-shaped fixed plate 372 and a second connecting plate 373; the pull rod 371 is arranged in parallel with the pressure rod 362, and a cross bar 3711 is arranged at one end of the pull rod 371, and the cross bar 3711 is perpendicular to the pull rod 371; the U-shaped fixed plate 372 is fixed on the first wedge block 3331, and a guide groove 3721 corresponding to the pull rod 371 is opened on the U-shaped fixed plate 372; the two ends of the second connecting plate 373 are respectively connected to the pull rod 371 and the pressure rod 362.

[0053] After the valve core 2 is installed in the valve body 1, the staff presses the pressure rod 362, and the pressure rod 362 drives the insertion rod 3641 to be pulled out of the insertion hole through the two rebound extrusion structures 363. At the same time, the pressure rod 362 drives the pull rod 371 to move downward through the second connecting plate 373, and the pull rod 371 drives the cross bar 3711 to move downward. Then the staff rotates the first wedge block 3331 downward, and the first wedge block 3331 drives the U-shaped fixing plate 372 to move. The guide groove 3721 on the U-shaped fixing plate 372 corresponds to the pull rod 371. When the cross bar 371 When the first wedge block 3331 is located inside the U-shaped fixing plate 372, the staff removes the force applied to the pressure rod 362, and the pressure rod 362 drives the pull rod 371 to move upward through the second connecting plate 373. The pull rod 371 pulls the cross bar 3711 to abut against the inner wall of the U-shaped fixing plate 372, so that the U-shaped fixing plate 372 is subjected to an upward force, and the first wedge block 3331 is therefore subjected to an upward pulling force, so that the position of the first wedge block 3331 remains unchanged after it rotates downward, thereby achieving that both states of the first wedge block 3331 can be controlled by the pressure rod 362.

[0054] Reference Figure 3 and Fig.11 As shown, the opening and closing mechanism 13 includes two connecting arm assemblies 131, two first moving blocks 132, an opening and closing driving assembly 133 and a first guide structure 134; the two connecting arm assemblies 131 are symmetrically arranged about the middle surface of the lower shell 12, and one end of the connecting arm assembly 131 is axially connected to the lower shell 12; the two first moving blocks 132 are respectively arranged at the same end of the two connecting arm assemblies 131, and the first moving blocks 132 are axially connected to the connecting arm assemblies 131; the opening and closing driving assembly 133 is arranged on the side wall of the upper shell 11, and the opening and closing driving assembly 133 is used to drive the two first moving blocks 132 to move closer to and away from each other; the first guide structure 134 is Placed at one end of the lower shell 12, the first guide structure 134 guides the movement of the upper shell 11. The first guide structure 134 includes a first cover body 1341, a second cover body 1342 and a telescopic connecting column 1343. The first cover body 1341 is connected to the side wall of the lower shell 12, and the second cover body 1342 is connected to the side wall of the upper shell 11. When the first cover body 1341 and the second cover body 1342 are close to each other, the two connecting arm assemblies 131, the two first moving blocks 132 and the opening and closing driving assembly 133 are completely covered. The two ends of the telescopic connecting column 1343 are respectively connected to the end of the first cover body 1341 and the end of the second cover body 1342.

[0055] The staff places the valve core 2 on the lower shell 12, and then the two opening and closing mechanisms 13 work simultaneously. The opening and closing drive assembly 133 drives the two first moving blocks 132 to approach each other, and the first moving block 132 drives the connecting arm assembly 131 to rotate around the axial connection between the connecting arm assembly 131 and the lower shell 12. Since the length of the connecting arm assembly 131 remains unchanged, the connecting end of the connecting arm assembly 131 and the first moving block 132 will apply a downward force to the first moving block 132. The first movement transmits the force to the upper shell 11 through the opening and closing drive structure. The upper shell 11 moves toward the lower shell 12 under the guidance of the telescopic connecting column 1343, thereby achieving the clamping of the valve core 2.

[0056] Reference Fig.11 and Fig.12 As shown: the connecting arm assembly 131 includes a first connecting arm 1311, a second connecting arm 1312 and a first spring 1313; one end of the first connecting arm 1311 is axially connected to the lower shell 12; one end of the second connecting arm 1312 is axially connected to the first moving block 132, and the other end of the second connecting arm 1312 and the other end of the first connecting arm 1311 are plugged into each other; the first spring 1313 is sleeved on the overlapping part of the first connecting arm 1311 and the second connecting arm 1312, and the two ends of the first spring 1313 are respectively abutted against the end of the first connecting arm 1311 and the end of the second connecting arm 1312.

[0057] In the initial state, the first spring 1313 has a force to shorten the length of the first connecting arm 1311 and the second connecting arm 1312. When the upper shell 11 and the lower shell 12 clamp the valve core 2, the opening and closing drive assembly 133 continues to drive the two first moving blocks 132 to approach each other. The first moving block 132 pulls the second connecting arm 1312 and the first connecting arm 1311 to slide relative to each other. The first spring 1313 is compressed, so that the total length of the connecting arm assembly 131 increases. The first spring 1313 applies a force toward the first connecting arm 1311 to the second connecting arm 1312. The force is decomposed into a vertical downward force at the connection between the second connecting arm 1312 and the first moving block 132, so that the force applied by the upper shell 11 and the lower shell 12 to the valve core 2 is increased, thereby improving the sealing between the upper shell 11, the lower shell 12 and the valve core 2.

[0058] A method for using an automatic switching valve comprises the following steps:

[0059] S1, the two opening and closing mechanisms 13 adjust the distance between the upper shell 11 and the lower shell 12 so that the distance between the two matches the thickness of the valve core 2;

[0060] S2, the valve core 2 is placed on the lower housing 12, and the two opening and closing mechanisms 13 drive the upper housing 11 to move smoothly toward the lower housing 12. The upper housing 11 and the lower housing 12 clamp and fix the valve core 2, and connect the plurality of liquid outlet connecting pipes 122 in the lower housing 12 to the plurality of guide holes 21;

[0061] S3, the automatic switching mechanism 3 closes the plurality of flow guide holes 21, separates the upper shell 11 from the lower shell 12, and injects the test sample into the upper shell 11;

[0062] S4, when one of the liquid outlet connecting tubes 122 needs to guide the sample flow, the two sealing structures 32 in the corresponding mounting sleeve 31 are simultaneously moved away from each other, so that the guide hole 21 is opened.

[0063] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. An automatic switching valve, characterized in that: It comprises a valve body (1), a valve core (2) and an automatic switching mechanism (3); The valve body (1) comprises an upper shell (11), a lower shell (12) and two opening and closing mechanisms (13); the upper shell (11) and the lower shell (12) are arranged up and down; a sealing cover plate (111) is arranged at the upper end of the upper shell (11); a support plate (121) is arranged inside the lower shell (12); a plurality of liquid outlet connecting pipes (122) are arranged at equal intervals on the support plate (121); the two opening and closing mechanisms (13) are respectively arranged at two ends of the lower shell (12); the opening and closing mechanisms (13) are used to control the distance between the upper shell (11) and the lower shell (12); The valve core (2) is arranged between the upper shell (11) and the lower shell (12); a plurality of flow guide holes (21) and a plurality of interception channels (22) are provided on the valve core (2) at equal intervals; two ends of the flow guide holes (21) extend toward the upper shell (11) and the lower shell (12), respectively; the flow guide holes (21) are connected to the liquid outlet connecting pipe (122); the plurality of interception channels (22) correspond to the plurality of flow guide holes (21) one by one, respectively; and the interception channels (22) are perpendicular to and communicate with the flow guide holes (21); There are a plurality of automatic switching mechanisms (3), and the plurality of automatic switching mechanisms (3) are respectively arranged in a plurality of interception channels (22). The automatic switching mechanisms (3) are used to control the diversion holes (21) to participate in diversion.

2. An automatic switching valve according to claim 1, characterized in that: The automatic switching mechanism (3) comprises a mounting sleeve (31), two sealing structures (32) and a driving mechanism (33); The mounting sleeve (31) is arranged in the interception channel (22), the middle part of the mounting sleeve (31) is connected to the guide hole (21), the inner diameter of the mounting sleeve (31) is larger than the inner diameter of the guide hole (21), and end covers (311) are arranged at both ends of the mounting sleeve (31); Two sealing structures (32) are respectively arranged at two ends inside the mounting sleeve (31), and the sealing structure (32) comprises a sealing block (321), a driving shaft (322), a limiting plate (323) and a rebound structure (324). The outer diameter of the sealing block (321) is the same as the inner diameter of the mounting sleeve (31). The driving shaft (322) and the mounting sleeve (31) are coaxially arranged. One end of the driving shaft (322) is connected to the sealing block (321), and the other end of the driving shaft (322) extends out of an end cover plate (311). The limiting plate (323) is sleeved on the driving shaft (322), and the limiting plate (323) is fixedly connected to the mounting sleeve (31). The rebound structure (324) is arranged on one side of the limiting plate (323), and the rebound structure (324) is used to apply a force to the driving shaft (322) away from the middle of the valve core (2); The driving mechanism (33) is arranged in the upper housing (11), and is used to drive the two sealing structures (32) to move towards the middle of the valve core (2) at the same time.

3. An automatic switching valve according to claim 2, characterized in that: The driving mechanism (33) comprises a rectangular box (331), a hanging plate (332), two first driving components (333), a lifting driving structure (334) and two balancing guide structures (335); The rectangular box (331) is arranged inside the upper shell (11), and both ends of the rectangular box (331) extend out of the upper shell (11); The hanging plate (332) is arranged inside the rectangular box (331), and both ends of the hanging plate (332) extend out of the upper shell (11); Two first drive assemblies (333) are respectively arranged at two ends of the hanging plate (332), and the first drive assembly (333) includes a first wedge block (3331) and a second wedge block (3332), the first wedge block (3331) is connected to the hanging plate (332), and the second wedge block (3332) is connected to the driving shaft (322); The lifting drive structure (334) is arranged between the hanging plate (332) and the rectangular box (331), and the lifting drive structure (334) is used to drive the hanging plate (332) to translate in the rectangular box (331); Two balancing guide structures (335) are respectively arranged at two ends of the rectangular box (331), and the two balancing guide structures (335) are used to keep the two ends of the hanging plate (332) moving synchronously.

4. The automatic switching valve according to claim 2, characterized in that: The automatic switching mechanism (3) further comprises a first sealing component (34), wherein the first sealing component (34) is arranged between the two sealing blocks (321).

5. The automatic switching valve according to claim 2, characterized in that: The automatic switching mechanism (3) further comprises two second sealing assemblies (35), wherein the two second sealing assemblies (35) are respectively arranged on the opposite sides of the two sealing blocks (321).

6. An automatic switching valve according to claim 2, characterized in that: The automatic switching mechanism (3) further comprises two folding structures (36), the two folding structures (36) being respectively arranged at two ends of the hanging plate (332), the folding structure (36) comprising a rectangular frame (361), a pressure rod (362), two rebound extrusion structures (363) and two plug-in structures (364); The rectangular frame (361) is fixed to one end of the hanging plate (332); One end of the pressure rod (362) passes through the middle of the frame of the rectangular frame (361) and penetrates into the interior of the rectangular frame (361); Two rebound extrusion structures (363) are respectively arranged on both sides of the pressure rod (362), and the rebound extrusion structures (363) are used to apply a force toward the middle of the rectangular frame (361) to the plug-in structure (364); The two plug-in structures (364) are respectively arranged at two ends of the rectangular frame (361), and the two plug-in structures (364) are respectively connected to the two rebound extrusion structures (363).

7. An automatic switching valve according to claim 6, characterized in that: The automatic switching mechanism (3) further comprises two fixed structures (37), the two fixed structures (37) respectively corresponding to the two folding structures (36), and the fixed structure (37) comprises a pull rod (371), a U-shaped fixed plate (372) and a second connecting plate (373); The pull rod (371) is arranged in parallel with the pressure rod (362), a cross bar (3711) is arranged at one end of the pull rod (371), and the cross bar (3711) is perpendicular to the pull rod (371); The U-shaped fixing plate (372) is fixed on the first wedge-shaped block (3331), and a guide groove (3721) corresponding to the pull rod (371) is formed on the U-shaped fixing plate (372); Two ends of the second connecting plate (373) are respectively connected to the pull rod (371) and the pressure rod (362).

8. The automatic switching valve according to claim 1, characterized in that: The opening and closing mechanism (13) comprises two connecting arm assemblies (131), two first moving blocks (132), an opening and closing driving assembly (133) and a first guiding structure (134); The two connecting arm assemblies (131) are symmetrically arranged with respect to the middle surface of the lower shell (12), and one end of the connecting arm assembly (131) is axially connected to the lower shell (12); The two first moving blocks (132) are respectively arranged at the same end of the two connecting arm assemblies (131), and the first moving blocks (132) and the connecting arm assemblies (131) are axially connected; The opening and closing driving assembly (133) is arranged on the side wall of the upper shell (11), and the opening and closing driving assembly (133) is used to drive the two first moving blocks (132) to move closer to and away from each other; The first guide structure (134) is arranged at one end of the lower shell (12), and the first guide structure (134) plays a guiding role in the movement of the upper shell (11).

9. An automatic switching valve according to claim 8, characterized in that: The connecting arm assembly (131) includes a first connecting arm (1311), a second connecting arm (1312) and a first spring (1313); One end of the first connecting arm (1311) is axially connected to the lower housing (12); One end of the second connecting arm (1312) is axially connected to the first moving block (132), and the other end of the second connecting arm (1312) and the other end of the first connecting arm (1311) are plugged into each other; The first spring (1313) is sleeved on the overlapping part of the first connecting arm (1311) and the second connecting arm (1312), and the two ends of the first spring (1313) are respectively abutted against the end of the first connecting arm (1311) and the end of the second connecting arm (1312).

10. A method for using an automatic switching valve, applied to an automatic switching valve according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, the two opening and closing mechanisms (13) adjust the distance between the upper shell (11) and the lower shell (12) so that the distance between the two is consistent with the thickness of the valve core (2); S2, placing the valve core (2) on the lower housing (12), the two opening and closing mechanisms (13) drive the upper housing (11) to move smoothly toward the lower housing (12), the upper housing (11) and the lower housing (12) clamp and fix the valve core (2), and connect a plurality of liquid outlet connecting pipes (122) in the lower housing (12) to a plurality of guide holes (21); S3, the automatic switching mechanism (3) closes the plurality of flow guide holes (21), separates the upper shell (11) from the lower shell (12), and injects the test sample into the upper shell (11); S4, when one of the liquid outlet connecting tubes (122) needs to guide the flow of the sample, the two sealing structures (32) in the corresponding mounting sleeve (31) move away from each other at the same time, so that the guide hole (21) is opened.

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