A multi-position multi-way PH valve

Abstract

The present invention relates to the field of valve technology, and specifically to a multi-position multi-way PH valve, comprising an upper valve cover, a PH probe, a sealing ring, a housing, a rotating shaft and a connecting ring, wherein a plurality of liquid flow channels are circumferentially provided on the end face of the upper valve cover, and an annular sealing groove is provided at one end of the upper valve cover, and the annular sealing groove extends along the axis of the upper valve cover. The present invention is provided with a transmission assembly, and when it is necessary to adjust the connecting groove connected to the liquid flow channel, the sealing ring is first rotated by a preset angle through the transmission assembly, and the liquid flow channel is blocked by the sealing ring, and then the connecting ring is rotated relative to the sealing ring through the transmission assembly so that the sealing ring and the connecting ring no longer maintain surface contact, so that in the process of adjusting the position of the connecting groove, the sealing surface of the sealing ring and the connecting ring is prevented from being damaged due to large-scale relative rotation friction, which is beneficial to ensuring the sealing performance of the PH valve and extending the service life of the PH valve.

Description

Technical Field

[0001] The invention relates to the technical field of valves, in particular to a multi-position multi-way PH valve. Background Art

[0002] Multi-position multi-way PH valve is an advanced control valve, mainly used in complex fluid control systems that require precise adjustment and control of fluid flow direction and flow rate. "Multi-position" means that the valve has more than two switch positions, such as two-position (open / closed), three-position (open / closed / bypass), etc., and "multi-way" means that the valve structure design allows the fluid to pass through more than two inlets and outlets. Common multi-way switching functions include two-way, three-way, four-way, etc. This type of valve is usually used in conjunction with an automatic control system. It can automatically adjust the flow path according to preset conditions such as pH value. It is widely used in chemical, water treatment, biopharmaceutical and other industries to achieve flexible control of the flow direction of the medium and precise adjustment of the pH value.

[0003] When the existing multi-position multi-way PH valve is in use, the motor usually drives the rotating shaft to rotate, and the rotating shaft drives the lower pad to rotate. The rotation of the lower pad controls the connection between different ports, thereby controlling the location of different test liquids flowing through the PH probe, so as to detect the PH value of the test liquid through the PH probe. However, the existing multi-position multi-way PH valve has the following defects when in use: when switching the flow path of the test liquid, the two sealing surfaces of the PH valve will rotate relative to each other due to friction. In the long run, the sealing surface of the PH valve will be damaged and the sealing performance will be reduced. Summary of the invention

[0004] Based on this, it is necessary to provide a multi-position multi-way PH valve to address the problems existing in the current multi-position multi-way PH valve, so as to solve the problem that when the existing multi-position multi-way PH valve switches the detection liquid flow channel, the two sealing surfaces of the PH valve will rotate relative to each other due to friction. In the long run, the sealing surface of the PH valve will be damaged and the sealing performance will be reduced.

[0005] The above purpose is achieved through the following technical solutions:

[0006] A multi-position multi-way PH valve comprises:

[0007] An upper valve cover, the end surface of which is provided with a plurality of liquid flow channels in the circumferential direction, an annular sealing groove is provided at one end of the upper valve cover, the annular sealing groove extends along the axis of the upper valve cover, and the liquid flow channel penetrates inward from the outer end of the upper valve cover to the bottom of the annular sealing groove;

[0008] A PH probe is arranged on the upper valve cover, and the probe area of ​​the PH probe can be connected with a preset liquid flow channel;

[0009] A sealing ring, wherein a plurality of liquid communication holes are opened in the circumferential direction of the end surface of the sealing ring, and the liquid communication holes correspond to the liquid flow passages one by one. The sealing ring is coaxially rotatably arranged in the annular sealing groove, and the sealing ring can rotate at a preset angle relative to the upper valve cover, so that the end of the liquid flow passage close to the sealing ring is blocked by the sealing ring;

[0010] The outer shell is coaxially fixedly connected with the upper valve cover;

[0011] A rotating shaft is rotatably disposed in the housing and can rotate around its axis and relatively move along its axis;

[0012] A connecting ring, the connecting ring and the rotating shaft can rotate synchronously, and the connecting ring is coaxially arranged in the housing;

[0013] A plurality of connecting grooves are provided on the end surface of the connecting ring;

[0014] A transmission assembly is provided between the connecting ring and the sealing ring, and the transmission assembly is used to make the connecting ring and the sealing ring maintain surface contact and rotate synchronously before the sealing ring rotates relative to the upper valve cover by a preset angle, and to make the connecting ring rotate relative to the sealing ring and no longer maintain surface contact after the sealing ring rotates relative to the upper valve cover by a preset angle, and to make the connecting ring and the sealing ring contact surface again and make the sealing ring rotate in the opposite direction to reset after the connecting ring stops rotating.

[0015] In one embodiment, the transmission assembly includes an elastic protrusion and an oblique guide groove. The elastic protrusion is arranged on an end face of the connecting ring close to the sealing ring. The sealing ring includes a large diameter ring and a small diameter ring. The large diameter ring and the small diameter ring are coaxially arranged. The oblique guide groove is opened on the outer peripheral surface of the small diameter ring, and the elastic protrusion can slide and abut against the oblique guide groove.

[0016] In one embodiment, the transmission assembly further includes a blocking piece and a blocking arc groove, wherein the blocking piece is arranged on the circumferential surface of the large diameter ring, the blocking arc groove is opened on the circumferential surface of the annular sealing groove, and the blocking piece is located in the blocking arc groove.

[0017] In one of the embodiments, an annular mounting groove is further provided in the outer shell, a bearing sleeve is coaxially arranged at the bottom of the annular mounting groove, a second bearing is arranged in the bearing sleeve, a first bearing is rotatably arranged in the annular mounting groove, the first bearing is in coaxial surface contact with the annular mounting groove, the rotating shaft passes through the first bearing and the second bearing, and the transmission assembly also includes an annular spring leaf, which is located between the rotating shaft and the first bearing and outside the rotating shaft.

[0018] In one of the embodiments, a guide ring is detachably provided in the annular installation groove, the outer circumference of the guide ring is in surface contact with the inner circumference of the annular installation groove, and the inner circumference of the guide ring is in surface contact with the rotating shaft.

[0019] In one of the embodiments, a negative pressure suction component is provided between the upper valve cover and the sealing ring, and the negative pressure suction component is used to suck the residual liquid in the liquid connecting hole into the interior of the negative pressure suction component after the liquid flow channel is sealed by the sealing ring.

[0020] In one embodiment, the negative pressure suction component includes a guide groove, a piston, and a ball head connecting rod. There are multiple guide grooves, and multiple guide grooves are opened at the bottom of the annular sealing groove, and multiple guide grooves correspond one-to-one to the liquid flow channels. Multiple negative pressure suction cavities are opened inside the sealing ring, and multiple negative pressure suction cavities correspond one-to-one to the liquid connecting holes. The piston is arranged in the negative pressure suction cavity, and the piston divides the negative pressure suction cavity from the outside to the inside into a first area and a second area, and the second area is connected to the corresponding liquid connecting hole. The piston is fixedly connected to the ball head connecting rod, and the ball head connecting rod passes through the first area and can be slidably connected to the guide groove. A first compression spring is provided in the second area, and one end of the first compression spring is fixedly connected to the bottom of the second area, and the other end of the first compression spring is fixedly connected to the piston.

[0021] In one embodiment, the connecting groove includes a first through groove, a second through groove and a third through groove, there are two first through grooves, two second through grooves and two third through grooves, the first through groove is in the shape of a circular hole, and the two first through grooves are connected.

[0022] In one of the embodiments, a plurality of connecting columns are provided on the circumference of the end surface of the rotating shaft, and a connecting hole is provided on the circumference of the end surface of the connecting ring, and the connecting columns are coaxially inserted into the connecting holes.

[0023] In one of the embodiments, an elastic sealing ring is provided at the connection between the outer shell and the upper valve cover.

[0024] The beneficial effects of the present invention are:

[0025] The present invention is provided with a transmission component. When it is necessary to adjust the connecting groove connected to the liquid flow channel, the sealing ring is first rotated by a preset angle through the transmission component, and the liquid flow channel is blocked by the sealing ring. Then, the connecting ring is rotated relative to the sealing ring through the transmission component so that the sealing ring and the connecting ring no longer maintain surface contact. Therefore, in the process of adjusting the position of the connecting groove, the sealing surface of the sealing ring and the connecting ring is prevented from being damaged due to large-scale relative rotation friction, which is beneficial to ensuring the sealing performance of the PH valve and extending the service life of the PH valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is an overall schematic diagram of a multi-position multi-way PH valve of the present invention;

[0027] Figure 2 It is a side view of a multi-position multi-way PH valve of the present invention;

[0028] Figure 3 for Figure 2 Middle AA section view;

[0029] Figure 4 This is an exploded view of a multi-position multi-way PH valve of the present invention;

[0030] Figure 5 This is a schematic structural diagram of an upper valve cover in a multi-position multi-way PH valve of the present invention;

[0031] Figure 6 This is a schematic structural diagram of a sealing ring in a multi-position multi-way PH valve of the present invention;

[0032] Figure 7 It is a structural schematic diagram of a negative pressure suction component in a multi-position multi-way PH valve of the present invention;

[0033] Figure 8 This is a schematic structural diagram of an inclined guide groove in a multi-position multi-way PH valve of the present invention;

[0034] Fig. 9 This is a schematic structural diagram of a connecting ring in a multi-position multi-way PH valve of the present invention;

[0035] Fig.10 This is a schematic diagram of the circumferential arrangement of liquid flow channels in a multi-position multi-way PH valve of the present invention;

[0036] Fig.11 It is a structural schematic diagram of a connecting groove in a multi-position multi-way PH valve of the present invention;

[0037] Fig.12 This is a schematic diagram of a first state of a multi-position multi-way PH valve of the present invention;

[0038] Fig.13 This is a schematic diagram of a second state of a multi-position multi-way PH valve of the present invention;

[0039] Fig.14 It is a schematic diagram of a third state of a multi-position multi-way PH valve of the present invention;

[0040] Fig.15 It is a schematic diagram of a fourth state of a multi-position multi-way PH valve of the present invention;

[0041] Fig.16 This is a schematic diagram of a fifth state of a multi-position multi-way PH valve according to the present invention.

[0042] in:

[0043] 100, upper valve cover; 110, liquid flow channel; 120, annular sealing groove; 130, fixing nut; 140, long ring groove; 200, pH probe; 300, sealing ring; 310, liquid communication hole; 320, large diameter ring; 330, small diameter ring; 340, blocking piece; 350, blocking arc groove; 360, negative pressure suction cavity; 361, first area; 362, second area; 370, first compression spring; 380, probe connection groove; 400, housing; 410, annular mounting groove; 420, bearing sleeve; 430, second bearing ; 440, first bearing; 450, annular spring; 460, guide ring; 470, lower pad; 500, rotating shaft; 510, connecting column; 520, latch; 530, retaining spring; 600, connecting ring; 610, connecting groove; 611, first through groove; 612, second through groove; 613, third through groove; 620, connecting hole; 700, transmission assembly; 710, elastic protrusion; 720, inclined guide groove; 800, negative pressure suction assembly; 810, guide groove; 820, piston; 830, ball head connecting rod; 900, elastic sealing ring. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0045] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0046] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0047] like Figure 1-Figure 16 As shown, a multi-position multi-way PH valve includes an upper valve cover 100, a PH probe 200, a sealing ring 300, a housing 400, a rotating shaft 500 and a connecting ring 600. The end surface of the upper valve cover 100 is circumferentially provided with a plurality of liquid flow channels 110. An annular sealing groove 120 is provided at one end of the upper valve cover 100. The annular sealing groove 120 extends along the axis of the upper valve cover 100. The liquid flow channel 110 is passed inward from one end of the outer side of the upper valve cover 100 to the bottom of the annular sealing groove 120. The PH probe 200 is provided at the bottom of the annular sealing groove 120. The PH probe 200 is arranged on the upper valve cover 100, and the probe area of ​​the PH probe 200 can be connected with the preset liquid flow path 110. The end surface of the sealing ring 300 is circumferentially provided with a plurality of liquid communication holes 310, and the liquid communication holes 310 correspond to the liquid flow path 110 one by one. The sealing ring 300 is coaxially rotatably arranged in the annular sealing groove 120, and the sealing ring 300 can be rotated by a preset angle relative to the upper valve cover 100, so that the liquid flow path 110 is close to one side of the sealing ring 300. The end is blocked by the sealing ring 300, the shell 400 is coaxially fixedly connected with the upper valve cover 100, the rotating shaft 500 is rotatably arranged in the shell 400, the rotating shaft 500 can rotate around its axis and move relatively along its axis, the connecting ring 600 and the rotating shaft 500 can rotate synchronously, the connecting ring 600 is coaxially arranged in the shell 400, a plurality of connecting grooves 610 are opened on the end surface of the connecting ring 600, and a transmission assembly 700 is arranged between the connecting ring 600 and the sealing ring 300. The transmission assembly 700 is used to make the connecting ring 600 and the sealing ring 300 keep surface contact and rotate synchronously before the sealing ring 300 rotates relative to the upper valve cover 100 by a preset angle, and to make the connecting ring 600 rotate relative to the sealing ring 300 and no longer keep surface contact after the sealing ring 300 rotates relative to the upper valve cover 100 by a preset angle, and to make the connecting ring 600 and the sealing ring 300 face contact again after the connecting ring 600 stops rotating and make the sealing ring 300 rotate in the opposite direction to reset.

[0048] Under normal working conditions, the liquid connecting holes 310 on the sealing ring 300 correspond one-to-one with and are connected to the liquid flow channels 110 on the upper valve cover 100. At this time, the sealing surface of the sealing ring 300 maintains surface contact with the sealing surface of the connecting ring 600, and the detection liquid in one liquid flow channel 110 flows out from the other liquid flow channel 110 after passing through the connecting groove 610.

[0049] When it is necessary to adjust the connection position of the liquid flow channel 110, the staff drives the rotating shaft 500 to rotate through the motor, and the rotating shaft 500 drives the connecting ring 600 to rotate synchronously. The connecting ring 600 drives the sealing ring 300 through the transmission assembly 700. Specifically, the connecting ring 600 first drives the sealing ring 300 to rotate synchronously by a preset angle through the transmission assembly 700, so that the sealing ring 300 rotates by a preset angle. At this time, the end of the liquid flow channel 110 close to the sealing ring 300 is blocked by the sealing ring 300, and the detection liquid in the liquid flow channel 110 will not overflow. After the sealing ring 300 rotates by a preset angle relative to the upper valve cover 100, the rotating shaft 500 drives the connecting ring 600 to rotate synchronously by a preset angle. Continue to rotate, specifically, the transmission assembly 700 makes the connecting ring 600 and the sealing ring 300 move away from each other from the maintaining surface contact to the maximum spacing position, and then move closer to each other from the maximum spacing position to the maintaining surface contact. After the connecting ring 600 and the sealing ring 300 are in surface contact again, the transmission assembly 700 makes the sealing ring 300 rotate in the opposite direction by a preset angle to complete the resetting of the sealing ring 300. At this time, the liquid connecting hole 310 on the sealing ring 300 corresponds to the liquid flow channel 110 on the upper valve cover 100 one by one and is connected. At this time, the adjustment of the connecting position of the liquid flow channel 110 is completed. At this time, the liquid flow channel 110 is connected to the corresponding connecting groove 610 after adjustment.

[0050] The present invention is provided with a transmission assembly 700. When it is necessary to adjust the connecting groove 610 connected to the liquid flow channel 110, the sealing ring 300 is first rotated to a preset angle through the transmission assembly 700, and the liquid flow channel 110 is blocked by the sealing ring 300. Then, the connecting ring 600 is rotated relative to the sealing ring 300 through the transmission assembly 700 so that the sealing ring 300 and the connecting ring 600 no longer maintain surface contact. Therefore, in the process of adjusting the position of the connecting groove 610, the sealing surfaces of the sealing ring 300 and the connecting ring 600 are prevented from being damaged due to large-scale relative rotational friction, which is beneficial to ensuring the sealing performance of the PH valve and extending the service life of the PH valve.

[0051] It should also be noted that, in the existing PH valve, when switching the connecting groove 610 connected to the liquid flow channel 110, the two sealing surfaces are in direct rotational friction contact, and the greater the rotation angle of the connecting ring 600, the greater the rotational friction distance. In the present invention, only when the sealing ring 300 rotates by a preset angle, the sealing surfaces of the sealing ring 300 and the connecting ring 600 are in direct rotational friction contact. After the sealing ring 300 rotates by the preset angle, the sealing ring 300 and the connecting ring 600 are no longer in rotational friction contact, but the rotational friction is transferred to between the transmission assembly 700 and the sealing ring 300. Therefore, the sealing surfaces of the sealing ring 300 and the connecting ring 600 are avoided from being damaged due to large-scale relative rotational friction, which is beneficial to ensure the sealing performance of the PH valve.

[0052] In a further embodiment, Figure 4 , Figure 5 , Figure 8 and Fig. 9 As shown, the transmission assembly 700 includes an elastic protrusion 710 and an oblique guide groove 720. The elastic protrusion 710 is arranged on an end face of the connecting ring 600 close to the sealing ring 300. The sealing ring 300 includes a large diameter ring 320 and a small diameter ring 330. The large diameter ring 320 and the small diameter ring 330 are coaxially arranged. The oblique guide groove 720 is opened on the outer peripheral surface of the small diameter ring 330. There are multiple oblique guide grooves 720, and the multiple oblique guide grooves 720 are arranged at circumferential intervals around the small diameter ring 330. The elastic protrusion 710 can slide and abut against the oblique guide groove 720. The transmission assembly 700 also includes a blocking piece 340 and a blocking arc groove 350. The blocking piece 340 is arranged on the peripheral surface of the large diameter ring 320, and the blocking arc groove 350 is opened on the peripheral surface of the annular sealing groove 120. The blocking piece 340 is located in the blocking arc groove 350.

[0053] It should be supplemented that, under normal working conditions, the blocking plate 340 is located in the middle of the blocking arc groove 350, and elastic members (not shown in the figure) are provided at both ends of the blocking arc groove 350, and the end of the elastic member (such as an elastic damping rod) away from the end of the blocking arc groove 350 is fixedly connected to the blocking plate 340.

[0054] It should also be noted that if Figure 4As shown, the housing 400 is further provided with an annular mounting groove 410, a bearing sleeve 420 is coaxially arranged at the bottom of the annular mounting groove 410, a second bearing 430 is arranged in the bearing sleeve 420, a first bearing 440 is rotatably arranged in the annular mounting groove 410, the first bearing 440 is in coaxial surface contact with the annular mounting groove 410, the rotating shaft 500 passes through the first bearing 440 and the second bearing 430, and the transmission assembly 700 further includes an annular spring 450, which is located between the rotating shaft 500 and the first bearing 440 and outside the rotating shaft 500. It can be understood that the first bearing 440 and the second bearing 430 are provided to guide and support the rotation of the rotating shaft 500, and the annular spring 450 is provided to axially reset the connecting ring 600 after the connecting ring 600 is axially away from the sealing ring 300.

[0055] When in use, the rotating shaft 500 drives the connecting ring 600 to rotate synchronously. Before the driving force between the elastic protrusion 710 and the inclined guide groove 720 is greater than the elastic force of the elastic member, the connecting ring 600 drives the sealing ring 300 to rotate synchronously. In this process, the blocking piece 340 gradually approaches the end of the blocking arc groove 350, and the elastic member is gradually compressed. When the elastic force of the elastic member is greater than the driving force between the elastic protrusion 710 and the inclined guide groove 720, the connecting ring 600 can no longer drive the sealing ring 300 to rotate synchronously. At this time, the sealing ring 300 just rotates a preset angle. At this time, the liquid flow channel 110 is blocked by the sealing ring 300. Next, as the connecting ring 600 continues to rotate, the elastic protrusion 710 moves along the inclined surface of the inclined guide groove 720 in a direction away from the sealing ring 300, and the elastic protrusion 710 drives the connecting ring 600 synchronously in a direction away from the sealing ring 300. The annular spring 450 moves and is gradually compressed. At this time, the sealing surfaces of the connecting ring 600 and the sealing ring 300 are no longer in contact, and the elastic protrusion 710 is tightly against the sealing ring 300. Therefore, when the connecting ring 600 continues to rotate, the connecting ring 600 applies a friction force in the same direction of rotation to the sealing ring 300 through the elastic protrusion 710 to overcome the elastic force of the elastic member. When the elastic protrusion 710 slides to the position of the other inclined guide groove 720, the elastic protrusion 710 is no longer in contact with the sealing ring 300. Under the elastic reset action of the annular spring 450, the elastic protrusion 710 slides onto the inclined guide groove 720. At the same time, under the elastic force of the elastic member, the sealing ring 300 rotates in the opposite direction to reset. At this time, the adjustment of the connecting position of the liquid flow channel 110 is completed. At this time, the liquid flow channel 110 is connected to the corresponding connecting groove 610 after adjustment.

[0056] It should be additionally explained that a lower pad 470 is provided between the connecting ring 600 and the rotating shaft 500 , so as to enable the connecting ring 600 and the rotating shaft 500 to move synchronously along the axis of the rotating shaft 500 through the lower pad 470 .

[0057] It should also be noted that if Figure 4 As shown, an annular groove is provided on the circumference of the rotating shaft 500 near the end thereof, a retaining spring 530 is provided in the annular groove, and a latch pin 520 is detachably mounted on the end of the rotating shaft 500 .

[0058] In a further embodiment, Figure 3 As shown, a guide ring 460 is detachably provided in the annular installation groove 410 , and the outer circumference of the guide ring 460 is in surface contact with the inner circumference of the annular installation groove 410 , and the inner circumference of the guide ring 460 is in surface contact with the rotating shaft 500 .

[0059] The guide ring 460 is provided to guide the rotating shaft 500 to prevent the rotation axis of the rotating shaft 500 from deviating.

[0060] In a further embodiment, Figure 6 As shown, a negative pressure suction component 800 is provided between the upper valve cover 100 and the sealing ring 300 . The negative pressure suction component 800 is used to suck the residual liquid in the liquid connecting hole 310 into the negative pressure suction component 800 after the liquid flow channel 110 is sealed by the sealing ring 300 .

[0061] Since the liquid connecting hole 310 is connected to the liquid flow channel 110 before rotating the preset angle, a certain amount of detection liquid will remain in the liquid connecting hole 310 after the liquid connecting hole 310 rotates the preset angle. In order to avoid liquid leakage, a negative pressure suction component 800 is required to be provided. After the liquid flow channel 110 is sealed by the sealing ring 300, the residual liquid in the liquid connecting hole 310 is sucked into the negative pressure suction component 800.

[0062] In a further embodiment, Figure 5 , Figure 6 and Figure 7 As shown, the negative pressure suction component 800 includes a guide groove 810, a piston 820, and a ball head connecting rod 830. There are multiple guide grooves 810, and the multiple guide grooves 810 are opened at the bottom of the annular sealing groove 120, and the multiple guide grooves 810 correspond to the liquid flow channel 110 one by one. The sealing ring 300 is provided with multiple negative pressure suction cavities 360, and the multiple negative pressure suction cavities 360 correspond to the liquid connecting holes 310 one by one. The piston 820 is arranged in the negative pressure suction cavity 360, and the piston 820 connects the negative pressure suction cavity 360 to the negative pressure suction cavity 360. 60 is divided into a first area 361 and a second area 362 from the outside to the inside, the second area 362 is connected to the corresponding liquid connecting hole 310, the piston 820 is fixedly connected to the ball head connecting rod 830, the ball head connecting rod 830 passes through the first area 361 and can be slidably connected to the guide groove 810, and a first compression spring 370 is provided in the second area 362, one end of the first compression spring 370 is fixedly connected to the bottom of the second area 362, and the other end of the first compression spring 370 is fixedly connected to the piston 820.

[0063] Before the sealing ring 300 rotates to a preset angle, the ball head connecting rod 830 abuts against the bottom of the annular sealing groove 120. After the sealing ring 300 rotates to a preset angle, the ball head connecting rod 830 moves from the position abutting against the bottom of the annular sealing groove 120 to the guide groove 810. At this time, the ball head connecting rod 830 drives the piston 820 to move in the direction close to the annular sealing groove 120. At this time, the volume in the second area 362 increases and the air pressure decreases. Under the action of negative pressure, the residual liquid in the liquid connecting hole 310 is sucked into the second area 362, thereby avoiding leakage of the detection liquid. When the sealing ring 300 rotates to reset, the ball head connecting rod 830 moves from the guide groove 810 to the position abutting against the bottom of the annular sealing groove 120. At this time, the volume of the second area 362 decreases, and the liquid in the second area 362 is squeezed into the liquid connecting hole 310 again, thereby avoiding the detection liquid remaining in the second area 362.

[0064] In a further embodiment, Fig. 9 As shown, the connecting groove 610 includes a first connecting groove 611, a second connecting groove 612 and a third connecting groove 613. There are two first connecting grooves 611, two second connecting grooves 612 and three third connecting grooves 613. The first connecting groove 611 is a circular hole, and the two first connecting grooves 611 are connected.

[0065] It should be added that if Fig.10 As shown, in the present invention, taking the number of six liquid flow channels 110 as an example, the six liquid flow channels 110 are numbered 1, 2, 3, 4, 5 and 6 respectively.

[0066] It should also be noted that if Figure 5 , Figure 6 and Figure 8 As shown, a long annular groove 140 is provided at the bottom of the annular sealing groove 120 , and the probe of the PH probe 200 is located in the long annular groove 140 . In addition, a probe connecting groove 380 is provided on the sealing ring 300 , and the probe connecting groove 380 can be connected to the long annular groove 140 .

[0067] like Fig.12As shown, at this time, the angle of rotation of the connecting ring 600 relative to the sealing ring 300 is 0°, and at this time, the liquid flow channels 110 No. 1 and No. 3 are connected to the probe connecting groove 380 through the third through groove 613. At this time, the detection liquid can flow in through the liquid flow channel No. 1, and flow into the third through groove 613 through the long ring groove 140 connected to the liquid flow channel No. 1, and then flow into the probe connecting groove 380 through the third through groove 613, and then flow into the long ring groove 140 connected to the liquid flow channel No. 3 through the probe connecting groove 380, and finally flow out from the liquid flow channel No. 3 through the long ring groove 140 connected to the liquid flow channel No. 3. At this time, the probe of the pH probe 200 can perform pH detection on the flowing detection liquid.

[0068] like Fig.13 As shown, after the rotating shaft 500 rotates 67.5°, the angle of rotation of the connecting ring 600 relative to the sealing ring 300 is 67.5°. At this time, the liquid flow channels 110 of No. 4 and No. 6 are connected to the probe connecting groove 380 through the third through groove 613. At this time, the detection liquid can flow in through the No. 4 liquid flow channel 110, flow into the third through groove 613 through the long ring groove 140 connected to the No. 4 liquid flow channel 110, and then flow into the probe connecting groove 380 through the third through groove 613, and then flow into the long ring groove 140 connected to the No. 6 liquid flow channel 110 through the probe connecting groove 380, and finally flow out from the No. 6 liquid flow channel 110 through the long ring groove 140 connected to the No. 6 liquid flow channel 110. At this time, the probe of the pH probe 200 can perform pH detection on the flowing detection liquid.

[0069] like Fig.14 As shown, after the rotating shaft 500 rotates 90°, the connecting ring 600 rotates 90° relative to the sealing ring 300. At this time, liquid flow channel No. 1 10 is connected to liquid flow channel No. 5, and liquid flow channel No. 2 110 is connected to liquid flow channel No. 3 110. The details are not repeated here.

[0070] like Fig.15 As shown, after the rotating shaft 500 rotates 202.5°, the connecting ring 600 rotates 202.5° relative to the sealing ring 300. At this time, the No. 1 liquid flow channel 110 and the No. 3 liquid flow channel 110 are connected, and the details are not repeated.

[0071] like Fig.16 As shown, after the rotating shaft 500 rotates 247.5°, the connecting ring 600 rotates 247.5° relative to the sealing ring 300. At this time, liquid flow channel No. 1 10 is connected to liquid flow channel No. 5 110, and liquid flow channel No. 2 110, the probe connecting groove 380 and liquid flow channel No. 3 110 are connected.

[0072] It can be understood that when the liquid flow channel 110 is connected to the probe connecting groove 380, it is used to detect the pH of the test liquid. When the liquid flow channel 110 is not connected to the probe connecting groove 380, the two liquid flow channels 110 are connected to each other for flushing the two current liquid flow channels 110.

[0073] In a further embodiment, Figure 4 and Fig. 9 As shown, a plurality of connection columns 510 are provided on the circumference of the end surface of the rotating shaft 500 , and a connection hole 620 is provided on the circumference of the end surface of the connecting ring 600 , and the connection columns 510 are coaxially inserted into the connection hole 620 .

[0074] The connection column 510 and the connection hole 620 are provided to enable the communication ring 600 and the rotating shaft 500 to rotate synchronously.

[0075] In a further embodiment, Figure 3 As shown, an elastic sealing ring 900 is provided at the connection between the housing 400 and the upper valve cover 100 .

[0076] The elastic sealing ring 900 is provided to improve the sealing performance of the connection between the housing 400 and the upper valve cover 100 .

[0077] In a further embodiment, Figure 4 As shown, the pH probe 200 is fixedly connected to the upper valve cover 100 via a fixing nut 130 .

[0078] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0079] The above-described embodiments only express several implementation methods 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 a person of ordinary skill in the art, several modifications 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. A multi-position multi-way PH valve, characterized in that: include: An upper valve cover, the end surface of which is provided with a plurality of liquid flow channels in the circumferential direction, an annular sealing groove is provided at one end of the upper valve cover, the annular sealing groove extends along the axis of the upper valve cover, and the liquid flow channel penetrates inward from the outer end of the upper valve cover to the bottom of the annular sealing groove; A PH probe is arranged on the upper valve cover, and the probe area of ​​the PH probe can be connected with a preset liquid flow channel; A sealing ring, wherein a plurality of liquid communication holes are opened in the circumferential direction of the end surface of the sealing ring, and the liquid communication holes correspond to the liquid flow passages one by one. The sealing ring is coaxially rotatably arranged in the annular sealing groove, and the sealing ring can rotate at a preset angle relative to the upper valve cover, so that the end of the liquid flow passage close to the sealing ring is blocked by the sealing ring; The outer shell is coaxially fixedly connected with the upper valve cover; A rotating shaft is rotatably disposed in the housing and can rotate around its axis and relatively move along its axis; A connecting ring, the connecting ring and the rotating shaft can rotate synchronously, and the connecting ring is coaxially arranged in the housing; A plurality of connecting grooves are provided on the end surface of the connecting ring; A transmission assembly is provided between the connecting ring and the sealing ring, and the transmission assembly is used to make the connecting ring and the sealing ring maintain surface contact and rotate synchronously before the sealing ring rotates relative to the upper valve cover by a preset angle, and to make the connecting ring rotate relative to the sealing ring and no longer maintain surface contact after the sealing ring rotates relative to the upper valve cover by a preset angle, and to make the connecting ring and the sealing ring contact with each other again and make the sealing ring rotate in the opposite direction and reset after the connecting ring stops rotating; the transmission assembly includes an elastic protrusion and an inclined guide groove, the elastic protrusion is arranged on an end face of the connecting ring close to the sealing ring, the sealing ring includes a large diameter ring and a small diameter ring, the large diameter ring and the small diameter ring are coaxially arranged, the inclined guide groove is provided on the outer peripheral surface of the small diameter ring, and the elastic protrusion can slide and abut against the inclined guide groove; the transmission assembly also includes a blocking piece and a blocking arc groove, the blocking piece is arranged on the peripheral surface of the large diameter ring, the blocking arc groove is provided on the peripheral surface of the annular sealing groove, and the blocking piece is located in the blocking arc groove.

2. A multi-position multi-way PH valve according to claim 1, characterized in that: The shell is also provided with an annular mounting groove, a bearing sleeve is coaxially arranged at the bottom of the annular mounting groove, a second bearing is arranged in the bearing sleeve, a first bearing is rotatably arranged in the annular mounting groove, the first bearing is in coaxial surface contact with the annular mounting groove, the rotating shaft passes through the first bearing and the second bearing, and the transmission assembly also includes an annular spring leaf, which is located between the rotating shaft and the first bearing and outside the rotating shaft.

3. A multi-position multi-way PH valve according to claim 2, characterized in that: A guide ring is detachably arranged in the annular installation groove, the outer circumference of the guide ring is in surface contact with the inner circumference of the annular installation groove, and the inner circumference of the guide ring is in surface contact with the rotating shaft.

4. A multi-position multi-way PH valve according to claim 1, characterized in that: A negative pressure suction component is provided between the upper valve cover and the sealing ring. The negative pressure suction component is used to suck the residual liquid in the liquid connecting hole into the negative pressure suction component after the liquid flow channel is sealed by the sealing ring.

5. A multi-position multi-way PH valve according to claim 4, characterized in that: The negative pressure suction component includes a guide groove, a piston, and a ball head connecting rod. There are multiple guide grooves, and the multiple guide grooves are opened at the bottom of the annular sealing groove, and the multiple guide grooves correspond one-to-one to the liquid flow channels. A multiple negative pressure suction chambers are opened inside the sealing ring, and the multiple negative pressure suction chambers correspond one-to-one to the liquid connecting holes. The piston is arranged in the negative pressure suction chamber, and the piston divides the negative pressure suction chamber from the outside to the inside into a first area and a second area, and the second area is connected to the corresponding liquid connecting hole. The piston is fixedly connected to the ball head connecting rod, and the ball head connecting rod passes through the first area and can be slidably connected to the guide groove. A first compression spring is arranged in the second area, and one end of the first compression spring is fixedly connected to the bottom of the second area, and the other end of the first compression spring is fixedly connected to the piston.

6. A multi-position multi-way PH valve according to claim 1, characterized in that: The communicating grooves include a first through groove, a second through groove and a third through groove. There are two first through grooves, two second through grooves and two third through grooves. The first through groove is in a circular hole shape, and the two first through grooves are connected.

7. The multi-position multi-way PH valve according to claim 1, characterized in that: A plurality of connection columns are provided on the circumference of the end surface of the rotating shaft, a connection hole is provided on the circumference of the end surface of the connecting ring, and the connection columns are coaxially inserted into the connection holes.

8. The multi-position multi-way PH valve according to claim 1, characterized in that: An elastic sealing ring is arranged at the connection between the shell and the upper valve cover.

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