Automatic pH testing and cleaning device

Abstract

The invention relates to an automatic pH testing and cleaning device which comprises a three-dimensional moving unit, a sample liquid mixing unit and a cleaning unit, the three-dimensional moving unit comprises a Y-axis assembly, an X-axis assembly and a Z-axis assembly, and a pH electrode and a liquid adding pipe are both connected with a moving part of the Z-axis assembly and used for driving the pH electrode and the liquid adding pipe to move between the sample liquid mixing unit and the cleaning unit; the sample liquid uniform mixing unit comprises a motor I, a rotating seat and a safety cavity, and the motor I is connected with the rotating seat through a linkage assembly to drive the rotating seat and a sample tube in the rotating seat to rotate so as to promote uniform mixing of sample liquid; the cleaning unit comprises a waste liquid bin and a hollow cleaning pipe, the top of the cleaning pipe is provided with a water inlet connector and an air inlet connector, the waste liquid bin is provided with a water outlet and an air outlet, and the pH electrode can be inserted into the cleaning pipe to be cleaned and dried by blowing.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of pH automatic testing equipment, and particularly relates to a pH automatic testing cleaning device. BACKGROUND

[0002] In the field of testing and analysis technology, adjusting the pH value of a solution or a sample is a basic and important operation. For operations with high precision requirements, a pH electrode and its control device are generally used to test the pH value of a sample solution. At present, the operation of adjusting the pH value of a solution or a sample generally adopts manual operation, which is low in efficiency and has human errors. In addition, the rapid cleaning and drying of the pH electrode is also a problem. The field urgently needs an automatic and low-cost pH automatic testing cleaning device. SUMMARY

[0003] In view of the above problems, the application provides a pH automatic testing cleaning device, which comprises a three-dimensional moving unit, a sample solution mixing unit and a cleaning unit. The three-dimensional moving unit comprises a Y-axis assembly, an X-axis assembly and a Z-axis assembly. A pH electrode and a liquid adding pipe are connected to the moving part of the Z-axis assembly, so as to drive the pH electrode and the liquid adding pipe to move between the sample solution mixing unit and the cleaning unit.

[0004] The sample solution mixing unit comprises a motor one, a rotating seat and a safety cavity. The motor one is connected to the rotating seat through a linkage assembly, drives the rotating seat and the sample pipe inside the rotating seat to rotate, and promotes the sample solution to be mixed uniformly.

[0005] The cleaning unit comprises a waste liquid bin and a hollow cleaning pipe. The top of the cleaning pipe is provided with a water inlet joint and an air inlet joint. The waste liquid bin is provided with a water outlet and an air outlet. The pH electrode can be inserted into the cleaning pipe to receive cleaning and air drying.

[0006] The application integrates the functions of solution liquid adding, pH value detection and pH electrode cleaning into one. The three-dimensional moving unit drives the pH electrode and the liquid adding pipe to move in the three-dimensional space to realize the above functions. Specifically, after the sample pipe is inserted, the liquid adding pipe adds liquid into the sample pipe to adjust the pH value of the sample solution. At this time, the pH electrode is in a safe position. After the liquid is added, the motor one drives the mixing position and the sample pipe to rotate to promote the solution in the sample pipe to be mixed uniformly. After the mixing position and the sample pipe stop rotating, the pH electrode moves to the mixing position, extends into the sample pipe and detects the pH value. Then, the pH electrode moves into the cleaning pipe, is cleaned by water first and is dried by air blowing later. After cleaning, the pH electrode can be used for detection again.

[0007] Optionally, the Y-axis assembly comprises a bottom plate 1, two Y-axis tracks, two support columns and a motor 2, the bottom plate 1 is square-shaped and used for supporting the Y-axis assembly; the two Y-axis tracks are parallel to each other; the two support columns are vertical and respectively slidably connected to the two Y-axis tracks; the top portions of the two support columns are jointly connected to a bottom plate 2; one end of the bottom plate 1 is provided with the motor 2; the bottom rotating shaft of the motor 2 is connected to a driving gear 1; the driving gear 1 is connected to a driven gear 1 through a synchronous belt 1; the synchronous belt 1 between the driving gear 1 and the driven gear 1 is parallel to the Y-axis tracks; the outer side surface of the synchronous belt 1 is connected to the nearby one of the support columns, thereby driving the two support columns to move along the Y-axis tracks.

[0008] Further optionally, a support base 1 is arranged below the motor 2 and used for supporting the motor 2; the support base 1 is hollow at the bottom and can be provided with the driving gear 1; the driving gear 1 is arranged near one end of one Y-axis track; the driven gear 1 is arranged near the other end of the Y-axis track; the outer side surface of the synchronous belt 1 is connected to the side surface of the nearby support column through at least one connecting rod.

[0009] Optionally, the X-axis assembly comprises a bottom plate 2, two X-axis tracks, a sliding block 1 and an air cylinder, the bottom plate 2 is square-shaped and used for supporting the X-axis assembly; the two X-axis tracks are parallel to each other; the sliding block 1 is slidably connected to the two X-axis tracks; an air cylinder is arranged beside the X-axis tracks; the telescopic rod of the air cylinder is parallel to the X-axis tracks and connected to the sliding block 1 through a connecting block; the air cylinder can control the connecting block and the sliding block 1 to move along the X-axis tracks.

[0010] Further optionally, the air cylinder is parallel to the X-axis tracks; the outer side end of the telescopic rod is connected to the side surface of the connecting block; the bottom surface of the connecting block is detachably connected to the sliding block 1; the side surface of the sliding block 1 away from the air cylinder is provided with a positioning clamp;

[0011] The positioning clamp extends towards the direction of the sample solution mixing unit; the positioning clamp comprises a hollow positioning cylinder; the top end and the bottom end of the positioning cylinder are open; the pH electrode can penetrate through the positioning cylinder; the positioning cylinder can define the position of the pH electrode and make the pH electrode keep vertical.

[0012] Optionally, the Z-axis assembly comprises a vertical plate, a Z-axis track, a sliding block 2 and a motor 3; the vertical plate is arranged on the connecting block and used for supporting the Z-axis assembly; the Z-axis track is arranged on the side surface of the vertical plate facing the direction of the sample solution mixing unit; the top portion of the vertical plate is provided with the motor 3; the rotating shaft of the motor 3 faces downward and is connected to a lead screw; the lead screw penetrates through the sliding block 2; the sliding block 2 is slidably connected to the Z-axis track; the sliding block 2 is connected to the pH electrode through a connecting plate; the motor 3 drives the sliding block 2 and the connecting plate to move up and down along the Z-axis track through the lead screw; the vertical plate, the Z-axis track and the lead screw are all vertically arranged.

[0013] Further, the side of the second sliding block facing the direction of the sample solution mixing unit is connected with a connecting plate, and the other side is connected with a Z-axis track; the connecting plate is vertically arranged, the bottom of the connecting plate is provided with two clamping positions for detachably clamping the pH electrode and the liquid adding pipe respectively.

[0014] Further, the top of the vertical plate is provided with a limiting component, the limiting component has a groove facing the direction of the sample solution mixing unit, and a sensor is arranged on the side of the groove facing the direction of the sample solution mixing unit; the top of the side of the second sliding block corresponding to the side of the limiting component is provided with a baffle, the baffle is parallel to the connected side and has a gap with the connected side, so that the baffle can be inserted into the groove of the limiting component, the baffle can move together with the second sliding block, when the baffle enters the groove and is sensed by the sensor, the third motor stops working, and the second sliding block moves to the highest position at this time to avoid colliding with the third motor.

[0015] Optionally, the sample solution mixing unit further comprises a second support, which is mounted on the first bottom plate; the second support is divided into left and right parts; the right part comprises a safety cavity, a hollow cavity and a right bottom cavity from top to bottom; the safety cavity is used for containing a buffer solution; the first motor is arranged in the hollow cavity; the rotating shaft of the first motor vertically penetrates into the right bottom cavity and connects with a second driving gear in the right bottom cavity.

[0016] The left part comprises a rotating seat and a left bottom cavity; the rotating seat is beside the hollow cavity and has an inner cavity for placing a sample tube; the bottom of the rotating seat has a connecting shaft, which penetrates into the left bottom cavity and connects with a second driven gear in the left bottom cavity; the second driving gear and the second driven gear are connected with a second synchronous belt.

[0017] Optionally, the cleaning unit is arranged on the first bottom plate; the top of the cleaning pipe is in a cylindrical shape, facilitating the insertion of the pH electrode into the cleaning pipe; the other part of the cleaning pipe is in a vertical rectangular shape, facilitating the accommodation of the pH electrode and leaving a spare space; the side of the bottom of the cleaning pipe is provided with an opening communicating with the waste liquid bin, for discharging the waste liquid and waste gas in the cleaning pipe into the waste liquid bin. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 FIG. 1 is a structural schematic view of the pH automatic test cleaning device (1);

[0019] Figure 2 FIG. 2 is a structural schematic view of the pH automatic test cleaning device (2);

[0020] Figure 3 FIG. 3 is a schematic view of a Y-axis assembly;

[0021] Figure 4 FIG. 4 is a schematic view of an X-axis assembly;

[0022] Figure 5It is a schematic view of Z-axis assembly;

[0023] Figure 6 It is a schematic view of cleaning unit;

[0024] Figure 7 It is a schematic view of sample liquid mixing unit;

[0025] Figure 8 It is a schematic view of stabilizing assembly;

[0026] Figure 9 It is a schematic view of stabilizing assembly from side.

[0027] In the drawing, 1-pH electrode, 2-rotating seat, 3-safety chamber, 4-motor one, 5-motor two, 6-motor three, 7-waste liquid bin, 8-cleaning pipe, 9-water inlet joint, 10-air inlet joint, 11-water outlet, 12-air outlet, 13-bottom plate one, 14-bottom plate two, 15-Y-axis rail, 16-support column, 17-driving gear two, 18-synchronous belt one, 19-driven gear one, 20-driven gear two, 21-support one, 22-support two, 23-X-axis rail, 24-sliding block one, 25-sliding block two, 26-cylinder, 27-connecting block, 28-positioning cylinder, 29-vertical plate, 30-Z-axis rail, 31-screw rod, 32-connecting plate, 33-fixing block, 34-clamping position, 35-limiting component, 36-flap, 37-hollow chamber, 38-sample tube, 39-accepting block, 40-chain groove one, 41-hinge one, 42-chain groove two, 43-hinge two, 44-chain groove three, 45-hinge three, 46-supporting rod, 47-telescopic rod, 48-vertical rod, 49-roller. DETAILED DESCRIPTION

[0028] The embodiment provides a pH automatic test cleaning device, as shown in the drawing, comprising a three-dimensional moving unit, a sample liquid mixing unit and a cleaning unit, the three-dimensional moving unit comprises a Y-axis assembly, an X-axis assembly and a Z-axis assembly, a pH electrode 1 and a liquid adding pipe are connected to a moving part of the Z-axis assembly, and the moving part is used for driving the pH electrode 1 and the liquid adding pipe to move between the sample liquid mixing unit and the cleaning unit. Figures 1-9

[0029] The sample liquid mixing unit comprises a motor one 4, a rotating seat 2 and a safety chamber 3, the motor one 4 is connected to the rotating seat 2 through a linkage assembly, drives the rotating seat 2 and a sample tube 38 in the rotating seat 2 to rotate, and promotes the sample liquid to be mixed uniformly.

[0030] The cleaning unit comprises a waste liquid bin 7 and a cleaning pipe 8 which is hollow inside, the cleaning pipe 8 is provided with a water inlet joint 9 and an air inlet joint 10 at the top, the waste liquid bin 7 is provided with a water outlet 11 and an air outlet 12, and the pH electrode 1 can be inserted into the cleaning pipe 8 to receive cleaning and air drying.

[0031] ​Optionally, the Y-axis assembly comprises a bottom plate 13, two Y-axis tracks 15, two support columns 16 and a motor 5, the bottom plate 13 is square-shaped and used for supporting the Y-axis assembly; the two Y-axis tracks 15 are parallel to each other; the two support columns 16 are vertical and respectively slidingly connected to the two Y-axis tracks; the top portions of the two support columns are jointly connected to a bottom plate 14; one end of the bottom plate 13 is provided with the motor 5, the bottom portion of the shaft of the motor 5 is connected to a driving gear 1, the driving gear 1 is connected to a driven gear 19 through a synchronous belt 18, the synchronous belt 18 between the driving gear 1 and the driven gear 19 is parallel to the Y-axis tracks 15; the outer side of the synchronous belt 18 is connected to a nearby support column 16, thereby driving the two support columns to move along the Y-axis tracks 15.

[0032] Further optionally, the bottom plate 13 is rectangular-shaped and capable of supporting the pH automatic testing and cleaning device; the Y-axis tracks 15 are parallel to the long sides of the bottom plate 13, and the two Y-axis tracks are respectively arranged near the two long sides of the bottom plate 13; the motor 5 is arranged near one wide side of the bottom plate 13, and the motor 5 is arranged near one end of one Y-axis track 15, so that the synchronous belt 18 is connected to the support column near the Y-axis track.

[0033] Further optionally, a support 21 is arranged below the motor 5 and used for supporting the motor 5, the lower portion of the support 21 is hollowed out and capable of arranging the driving gear 1; the driving gear 1 is arranged near one end of one Y-axis track, and the driven gear 19 is arranged near the other end of the Y-axis track; the outer side of the synchronous belt 18 is connected to the side of the nearby support column through at least one connecting rod.

[0034] The motor 5 drives the driving gear 1 to rotate, the driving gear 1 drives the driven gear 19 to rotate through the synchronous belt 18, and the synchronous belt 18 drives the support columns to move along the Y-axis tracks through the connecting rods, and since the top portions of the two support columns are jointly connected and support the X-axis assembly, the two support columns can move synchronously.

[0035] Optionally, the X-axis assembly comprises a bottom plate 14, two X-axis tracks 23, a sliding block 24 and a pneumatic cylinder 26, the bottom plate 14 is square-shaped and used for supporting the X-axis assembly; the two X-axis tracks 23 are parallel to each other; the sliding block 24 is slidingly connected to the two X-axis tracks 23; a pneumatic cylinder 26 is arranged beside the X-axis tracks 23, the telescopic rod of the pneumatic cylinder 26 is parallel to the X-axis tracks 23, and the telescopic rod is connected to the sliding block 24 through a connecting block 27, and the pneumatic cylinder 26 can control the connecting block 27 and the sliding block 24 to move along the X-axis tracks 23.

[0036] Further, the bottom plate two 14 is rectangular, capable of supporting the X-axis assembly and the Z-axis assembly; the X-axis track 23 is parallel to the long side of the bottom plate two 14, and the X-axis track 23 is perpendicular to the Y-axis track, two X-axis tracks 23 are arranged close to one long side of the bottom plate two 14, and the air cylinder 26 is arranged close to the other long side of the bottom plate two 14.

[0037] Further, the air cylinder 26 is parallel to the X-axis track 23, the outer side end of the telescopic rod is connected to the side of the connecting block 27, and the bottom surface of the connecting block 27 is detachably connected to the sliding block one 24; the side of the sliding block one 24 away from the air cylinder 26 is provided with a positioning clamp;

[0038] The positioning clamp extends towards the direction of the sample solution mixing unit, and the positioning clamp comprises a hollow positioning cylinder 28, the top end and the bottom end of the positioning cylinder 28 are open, the pH electrode 1 can penetrate through the positioning cylinder 28, the positioning cylinder 28 can define the position of the pH electrode 1, and the pH electrode 1 is kept vertical.

[0039] Further, the inside of the connecting block 27 and the sliding block one 24 is provided with a plurality of vertical through holes, and the through holes of the connecting block 27 and the sliding block one 24 correspond one by one from top to bottom; a plurality of positioning holes are arranged on the X-axis track 23, and the plurality of positioning holes are evenly arranged along the length direction of the X-axis track 23; when the connecting block 27 and the sliding block one 24 move to the predetermined position on the X-axis track 23, a screw is penetrated through the through holes of the connecting block 27 and the sliding block one 24 and the positioning holes of the X-axis track 23 from top to bottom, so as to position the connecting block 27 and the sliding block one 24. The connecting block 27 can provide stable support for the Z-axis assembly.

[0040] Optionally, the Z-axis assembly comprises a vertical plate 29, a Z-axis track 30, a sliding block two 25 and a motor three 6, the vertical plate 29 is arranged on the connecting block 27 and used for supporting the Z-axis assembly; the Z-axis track 30 is arranged on the side of the vertical plate 29 facing the direction of the sample solution mixing unit, the top of the vertical plate 29 is provided with the motor three 6, the rotating shaft of the motor three 6 faces downward and is connected with a lead screw 31, the lead screw 31 penetrates through the sliding block two 25, the sliding block two 25 is slidingly connected with the Z-axis track 30, the sliding block two 25 is connected with the pH electrode 1 through a connecting plate 32, and the motor three 6 drives the sliding block two 25 and the connecting plate 32 to move up and down along the Z-axis track 30 through the lead screw 31; the vertical plate 29, the Z-axis track 30 and the lead screw 31 are vertically arranged.

[0041] Further, the bottom of the vertical plate 29 is connected with a fixing block 33, the fixing block 33 is pressed on the upper surface of the connecting block 27, one end of the fixing block 33 away from the vertical plate 29 is provided with a recessed groove, and the bottom end of the lead screw 31 is rotatably connected with the groove, so as to fix the position of the lead screw 31, and the fixing block 33 is beneficial to stabilize the vertical plate 29; the side of the vertical plate 29 facing away from the direction of the sample solution mixing unit is provided with a plurality of rib plates for supporting the vertical plate 29.

[0042] Further, the side of the slider 25 facing the sample solution mixing unit is connected to a connecting plate 32, and the other side is connected to the Z-axis track 30; the connecting plate 32 is vertically arranged, and the bottom of the connecting plate 32 is provided with two clamping positions 34 for detachably clamping the pH electrode 1 and the liquid feeding pipe, respectively.

[0043] The center of the clamping position of the pH electrode 1 is provided with a through hole, allowing the pH electrode 1 to pass through the through hole, and the protruding flange at the top of the pH electrode 1 can be clamped on the upper edge of the corresponding through hole, while the pH electrode 1 passes through the positioning ring, so as to fix the relative position of the pH electrode 1 and the connecting plate 32. The center of the clamping position of the liquid feeding pipe is provided with two or three through holes with small diameters, a thin stainless steel pipe is inserted through the small through holes, and the outer side of the stainless steel pipe can be clamped on the upper edge of the corresponding small through hole, so as to fix the relative position of the stainless steel pipe and the small through hole; the liquid feeding pipe is generally a transparent and soft thin plastic pipe, the top end of the liquid feeding pipe is connected to a liquid tank and an existing machine capable of controlling the dropping amount and dropping speed, the bottom end of the liquid feeding pipe penetrates the inside of the stainless steel pipe and then penetrates out of the bottom end of the stainless steel pipe, and can be used to supply liquid to the sample tube 38.

[0044] Further, the top of the vertical plate 29 is provided with a limiting component 35, the limiting component 35 has a groove facing the sample solution mixing unit, and the side of the groove facing the sample solution mixing unit is provided with a sensor, and the sensing surface of the sensor faces the sample solution mixing unit; the top of the side of the slider 25 corresponding to the limiting component 35 is provided with a baffle 36, the baffle 36 is parallel to the connected side and has a gap with the connected side, so that the baffle 36 can be inserted into the groove of the limiting component 35, and the baffle 36 can move together with the slider 25; when the baffle 36 enters the groove and is sensed by the sensor, the motor 6 stops working, and the slider 25 moves to the highest position at this time, avoiding collision with the motor 6.

[0045] The three-dimensional moving unit of the present application is more compact, and the X-axis assembly and the Z-axis assembly are directly placed on the top of the Y-axis assembly, and the support column of the Y-axis assembly can drive the X-axis assembly and the Z-axis assembly to move together; the Z-axis assembly is arranged on the connecting block of the X-axis assembly and can directly move on the X-axis track. However, the entire Z-axis assembly has a certain height due to the vertical arrangement, and there is a stability problem when the connecting block moves.

[0046] Optionally, the second bottom plate is provided with a stabilizing assembly, which comprises two inclined supporting rods 46 and two vertical telescopic rods 47. The two supporting rods are respectively arranged on the left and right sides of the vertical plate. The bottom ends of the supporting rods are hingedly connected to the second bottom plate, and the top ends of the supporting rods are slidably connected to the left or right side of the vertical plate. The supporting rods 46 can change the inclination angle with the movement of the vertical plate. The line connecting the bottom ends of the two supporting rods is parallel to the X-axis track. The bottom ends of the telescopic rods 47 are connected to the control device, and the top ends of the telescopic rods are connected to the lower part of the corresponding supporting rod. The inclination angle of the supporting rod is controlled by the extension and contraction of the telescopic rod. The front and back sides of the vertical plate are respectively provided with a Z-axis track and a reinforced plate. The directions of the two ends of the X-axis track are the left and right sides of the vertical plate.

[0047] Further optionally, the two control devices are arranged on the second bottom plate and between the bottom ends of the two supporting rods. The control device is arranged close to the corresponding supporting rod.

[0048] Further optionally, the left and right sides of the vertical plate are respectively provided with a secondary Z-axis track. The secondary Z-axis track comprises two vertical vertical rods 48. One vertical rod is arranged close to the front side of the vertical plate, and the other vertical rod is arranged close to the back side of the vertical plate. The vertical rod has a gap with the left or right side of the corresponding vertical plate.

[0049] The top end of the supporting rod is provided with a roller 49. The wheel shaft of the roller is parallel to the left and right sides of the vertical plate. The two ends of the wheel shaft are respectively inserted into the gap between the vertical rod and the left or right side of the vertical plate on the two sides of the roller, so that the roller can move up and down along the secondary Z-axis track.

[0050] As a specific embodiment, the left side of the vertical plate is provided with two vertical rods. The distance between the two vertical rods and the left side of the vertical plate is equal. The two ends of the vertical rod are connected to the left side of the vertical plate through a shorter horizontal rod, so that the two vertical rods are parallel to the left side of the vertical plate. The top end of the supporting rod on the left side of the vertical plate is provided with a roller. The supporting rod has a groove at the top. The roller is arranged in the groove, and the roller can protrude from the groove by a part to butt against the secondary Z-axis track. The width of the supporting rod is smaller than the distance between the two vertical rods on the left side of the vertical plate. The two ends of the wheel shaft of the roller are inserted into the gap between the two vertical rods and the left side of the vertical plate, and the two ends of the wheel shaft are rotatably connected to the two ends of the groove. The right side of the vertical plate is also provided with a secondary Z-axis track and a butt joint with the corresponding supporting rod in the above-mentioned form. The control device is arranged below the corresponding supporting rod. The top end of the telescopic rod is movably connected to the lower part of the supporting rod, so that when the inclination angle of the supporting rod changes, the telescopic rod can also be connected to the supporting rod. When the Z-axis assembly is moved to the left by the connecting block, the left telescopic rod is elongated, the left supporting rod is lifted, the angle between the left supporting rod and the second bottom plate is increased, and the top end of the left supporting rod rolls upward in the secondary Z-axis track on the left side of the vertical plate. At the same time, the right telescopic rod of the vertical plate is shortened, the right supporting rod is pulled down, the angle between the right supporting rod and the second bottom plate is reduced, and the top end of the right supporting rod rolls downward in the secondary Z-axis track on the right side of the vertical plate.

[0051] The stable assembly can support the left and right sides of the vertical plate and can be adjusted in real time with the movement of the vertical plate, so as to adapt to and support the vertical plate at any time. Although the top ends of the two supporting rods are slidably connected to the vertical plate, the telescopic rods on the two sides can adjust and fix the inclination angle of the two supporting rods. The supporting rod, the second bottom plate and the vertical plate form a triangle, and the telescopic rod, the second bottom plate and the supporting rod also form a triangle. The double triangles can provide stable support for the vertical plate.

[0052] Optionally, the sample liquid mixing unit further comprises a second support 22 mounted on the first bottom plate 13. The second support 22 is divided into left and right parts. The right part comprises, from top to bottom, a safety cavity 3, a hollow cavity 37 and a right bottom cavity. The safety cavity 3 is used to hold a buffer solution. When the pH electrode 1 is not in use, it is moved into the safety cavity 3 and soaked in the buffer solution. The motor 1 4 is arranged in the hollow cavity 37. The rotating shaft of the motor 1 4 penetrates the right bottom cavity vertically downward and is connected to the driving gear 2 17 in the right bottom cavity.

[0053] The left part comprises a rotating seat 2 and a left bottom cavity. The rotating seat 2 is beside the hollow cavity 37 and is hollow inside, used for placing a sample tube 38. The bottom of the rotating seat 2 has a connecting shaft which penetrates the left bottom cavity and is connected to the driven gear 2 20 in the left bottom cavity. The driving gear 2 17 and the driven gear 2 20 are connected by a synchronous belt 2. The central axes of the rotating seat 2 and the safety cavity 3 are vertical.

[0054] Further optionally, the linkage assembly comprises the driving gear 2 17, the driven gear 2 20 and the synchronous belt 2. The left bottom cavity and the right bottom cavity are in communication. The bottom of the driven gear 2 20 is provided with a receiving block 39 which is mounted on the first bottom plate 13. The connecting shaft of the rotating seat 2 is rotatably connected to the receiving block 39. The motor 1 4 drives the driving gear 2 17 to rotate. The driving gear 2 17 drives the driven gear 2 20 and the connecting shaft to rotate through the synchronous belt 2, thereby driving the rotating seat 2 and the sample tube 38 to rotate, so that the sample liquid is mixed uniformly.

[0055] As a specific embodiment, the top of the hollow cavity 37 is a flat plate with a concave circular groove. The safety cavity 3 is a hollow cylinder which is inserted into the circular groove. The top of the left bottom cavity is also a flat plate on which the rotating seat 2 is placed. Preferably, the rotating seat 2 is made of hard plastic. The lower half of the rotating seat 2 is integral, and the upper half is divided into two halves. After the sample tube 38 is inserted into the rotating seat 2, a rope with relatively large elasticity is used to tie the two halves of the upper half to make them close to each other, thereby clamping the sample tube 38. Other methods can also be used to make the two halves of the upper half close to each other. The sample liquid mixing unit is arranged between the two Y-axis tracks and close to the wide side of the first bottom plate 13 away from the motor 2 5.

[0056] Further, the flat surface on the top of the hollow cavity 37 is provided with a rotatable liquid adding adjusting plate, the tail of the liquid adding adjusting plate is connected to the corresponding flat surface through a rod, the head of the liquid adding adjusting plate is suspended and has a through hole, and the liquid adding adjusting plate is horizontal; the liquid adding pipe passes through the corresponding clamping position and then passes through the through hole of the liquid adding adjusting plate, the bottom end of the liquid adding pipe can be clamped on the liquid adding adjusting plate and moves with the liquid adding adjusting plate, the rod is vertical and has a certain height, so that the liquid adding adjusting plate is above the sample tube, and then the bottom end of the liquid adding pipe is above the tube opening of the sample tube, thereby facilitating the dropwise addition of liquid into the sample tube.

[0057] In use, the three-dimensional moving unit moves the pH electrode 1 to the inside of the sample tube, the liquid in the tube immerses the sensing head of the pH electrode, and the pH electrode is beside the central axis of the sample tube, leaving space for the liquid adding pipe to add liquid. After the liquid adding pipe is connected to the liquid adding adjusting plate, the position of the liquid adding adjusting plate can be adjusted according to the position of the pH electrode, so as to avoid that the added liquid drops on the pH electrode, the clamping position and the fixing ring. When no liquid is added, the liquid adding adjusting plate moves the liquid adding pipe away by rotating, the rotating seat drives the sample tube to rotate, at this time, the pH electrode can be left in the sample tube to serve as a stationary stirring rod, or can be moved into the cleaning tube to wait. After the pH electrode is cleaned and dried, it is moved out of the cleaning tube, the liquid adding adjusting plate moves the liquid adding pipe to above the tube opening of the cleaning tube, and the residual liquid in the liquid adding pipe is discharged through the cleaning tube and the waste liquid bin.

[0058] Optionally, the cleaning unit is arranged on the bottom plate 1 and between the two Y-axis tracks, and the cleaning unit is between the sample mixing unit and the motor 5. The top of the cleaning tube 8 is cylindrical, facilitating the insertion of the pH electrode 1 into the cleaning tube 8. The other part of the cleaning tube 8 is a vertical rectangular shape, facilitating the accommodation of the pH electrode 1 and leaving a surplus space. The side surface of the bottom of the cleaning tube 8 is provided with an opening communicating with the waste liquid bin 7, for discharging the waste liquid and waste gas in the cleaning tube 8 into the waste liquid bin 7.

[0059] After the pH electrode 1 completes detection, the three-dimensional moving unit moves and inserts the pH electrode 1 into the cleaning tube 8. The pipeline of the cleaning water is connected to the water inlet joint 9, for spraying water into the cleaning tube 8 to clean the pH electrode 1, and the waste liquid after washing flows into the waste liquid bin 7. The water outlet 11 of the waste liquid bin 7 is connected to a water pump, which can guide the waste liquid out. After cleaning, a compressed air or inert gas cylinder is connected to the air inlet joint 10 to blow and dry the pH electrode 1, and the air outlet 12 of the waste liquid bin 7 is connected to a fume hood or waste treatment device, and the gas is discharged from the air outlet 12 of the waste liquid bin 7. After the pH electrode 1 is dried, the three-dimensional moving unit moves and inserts the pH electrode 1 into the safety cavity 3, waiting for the next test. The water pump and the small gas cylinder and other auxiliary components are displayed on the bottom plate 1. Figure 1

[0060] ​Optionally, the side of the three-dimensional moving unit away from the sample solution mixing unit is provided with an electrical box, in which an electrical control device is placed, for controlling the operation of each motor, air cylinder 26, sensor, liquid pump and pH electrode 1.

[0061] Optionally, the upper side of the synchronous belt 18 is provided with a chain groove 40 parallel to the Y-axis track, and the chain groove 40 is internally provided with a hinge 41, one end of the hinge 41 being fixed in the chain groove 40 away from the motor 5, the hinge 41 being arranged along the length direction of the chain groove 40, and the other end of the hinge 41 being connected to the air cylinder 26 of the X-axis assembly, the chain groove 40 being capable of moving with the support column.

[0062] The electrical and pneumatic lines of the air cylinder 26 are arranged in the hinge 41 after extending from the electrical box, and are laid along the hinge 41, the lines being inserted from the end of the hinge 41, extending along the hinge 41, and then being taken out from the head of the hinge 41 to be connected to the air cylinder 26. The hinge 41 can drive the electrical and pneumatic lines to move with the support column, avoiding the entanglement of the lines.

[0063] Optionally, the bottom plate 14 is provided with a chain groove 42 parallel to the X-axis track 23, and the chain groove 42 is internally provided with a hinge 43 arranged along the length direction of the chain groove 42, the end of the hinge 43 being fixed in the chain groove 42, and the head of the hinge 43 being connected to the back of the vertical plate 29, so that the hinge 43 can move with the vertical plate 29 along the X-axis track 23.

[0064] The lines of the motor 6 are arranged in the hinge 43 after extending from the electrical box, and are laid along the hinge 43, the lines being inserted from the end of the hinge 43, extending along the hinge 43, and then being taken out from the head of the hinge 43 to be connected to the motor 6.

[0065] Optionally, the side of the vertical plate 29 is provided with a chain groove 44 parallel to the Z-axis track 30, and the chain groove 44 is internally provided with a hinge 45 arranged along the length direction of the chain groove 44, the end of the hinge 45 being fixed in the chain groove 44, and the head of the hinge 45 being fixedly connected to the connecting part provided on the side of the connecting plate 32 and capable of moving with the connecting plate 32.

[0066] The lines of the pH electrode 1 are arranged in the hinge 45 and laid along the hinge 45, the lines being inserted from the end of the hinge 45, extending along the hinge 45, and then being taken out from the head of the hinge 45 to be connected to the pH electrode 1.

Claims

1. An automatic pH testing and cleaning device, characterized by, The three-dimensional moving unit comprises a Y-axis assembly, an X-axis assembly and a Z-axis assembly, the pH electrode and the liquid feeding pipe are connected to the moving part of the Z-axis assembly, and are used to drive the pH electrode and the liquid feeding pipe to move between the sample liquid mixing unit and the cleaning unit; The sample liquid mixing unit comprises a motor one, a rotating seat and a safety cavity, the motor one is connected to the rotating seat through a linkage assembly, drives the rotating seat and the sample tube inside the rotating seat to rotate, and promotes the sample liquid to be mixed uniformly; The cleaning unit comprises a waste liquid bin and a hollow cleaning pipe, the top of the cleaning pipe is provided with a water inlet joint and an air inlet joint, the waste liquid bin is provided with a water outlet and an air outlet, the pH electrode can be inserted into the cleaning pipe to receive cleaning and air drying.

2. The pH auto-test cleaning device of claim 1, wherein, The Y-axis assembly comprises a bottom plate one, two Y-axis tracks, two support columns and a motor two, the bottom plate one is square-shaped and is used to support the Y-axis assembly; The two Y-axis tracks are parallel to each other, the two support columns are vertical and are respectively slidably connected to the two Y-axis tracks, and the top of the two support columns is connected to a bottom plate two; One end of the bottom plate one is provided with the motor two, the bottom rotating shaft of the motor two is connected to a driving gear one, the driving gear one is connected to a driven gear one through a synchronous belt one, the synchronous belt one between the driving gear one and the driven gear one is parallel to the Y-axis track; the outer side of the synchronous belt one is connected to a nearby support column, thereby driving the two support columns to move along the Y-axis track.

3. The pH auto test cleaning device of claim 2, wherein, A support one is arranged below the motor two and is used to support the motor two, the support one is hollow at the bottom and can be provided with the driving gear one; the driving gear one is arranged near one end of a Y-axis track, the driven gear one is arranged near the other end of the Y-axis track; the outer side of the synchronous belt one is connected to the side of the nearby support column through at least one connecting rod.

4. The pH auto-test cleaning device of claim 1, wherein, The X-axis assembly comprises a bottom plate two, two X-axis tracks, a sliding block one and a cylinder, the bottom plate two is square-shaped and is used to support the X-axis assembly; the two X-axis tracks are parallel to each other, and the sliding block one is slidably connected to the two X-axis tracks; a cylinder is arranged beside the X-axis track, the telescopic rod of the cylinder is parallel to the X-axis track, and the telescopic rod is connected to the sliding block one through a connecting block, and the cylinder can control the connecting block and the sliding block one to move along the X-axis track.

5. The pH auto-test cleaning device of claim 4, wherein, The cylinder is parallel to the X-axis track, the outer side of the telescopic rod is connected to the side of the connecting block, and the bottom surface of the connecting block is detachably connected to the sliding block one; the side of the sliding block one away from the cylinder is provided with a positioning clamp; The positioning clamp extends towards the sample liquid mixing unit, the positioning clamp comprises a hollow positioning cylinder, the top end and the bottom end of the positioning cylinder are open, the pH electrode can penetrate through the positioning cylinder, the positioning cylinder can define the position of the pH electrode, and the pH electrode can be kept vertical.

6. The pH auto-test cleaning device of claim 4, wherein, The Z-axis assembly comprises a vertical plate, a Z-axis track, a sliding block two and a motor three, the vertical plate is arranged on the connecting block and is used to support the Z-axis assembly; The Z-axis track is arranged on the side of the vertical plate facing the sample liquid mixing unit, the top of the vertical plate is provided with a motor three, the rotating shaft of the motor three faces downward and is connected to a lead screw, the lead screw penetrates through the sliding block two, the sliding block two is slidably connected to the Z-axis track, the sliding block two is connected to the pH electrode through a connecting plate, the motor three drives the sliding block two and the connecting plate to move up and down along the Z-axis track through the lead screw; the vertical plate, the Z-axis track and the lead screw are vertically arranged.

7. The pH auto-test cleaning device of claim 6, wherein, The side of the slider two facing the direction of the sample solution mixing unit is connected with a connecting plate, and the other side is connected with a Z-axis track in a sliding mode; the connecting plate is vertically arranged, and the bottom of the connecting plate is provided with two clamping positions for detachably clamping a pH electrode and a liquid adding pipe respectively.

8. The pH auto test cleaning device of claim 6, wherein, The top of the vertical plate is provided with a limiting part having a groove facing the direction of the sample solution mixing unit, and a sensor is arranged on the side of the groove facing the direction of the sample solution mixing unit, and the sensing surface of the sensor faces the direction of the sample solution mixing unit; the top of the side of the slider two corresponding to the side of the limiting part is provided with a baffle parallel to the connected side and having a gap with the connected side, so that the baffle can be inserted into the groove of the limiting part, and the baffle can move together with the slider two; when the baffle enters the groove and is sensed by the sensor, the motor three stops working, and the slider two moves to the highest position at this time, thereby avoiding collision with the motor three.

9. The pH auto test cleaning device of claim 2, wherein, The sample solution mixing unit further comprises a support two mounted on the bottom plate one, and the support two is divided into left and right parts; the right part comprises a safety cavity, a hollow cavity and a right bottom cavity from top to bottom in sequence, and the safety cavity is used for containing a buffer solution; the motor one is arranged in the hollow cavity, the rotating shaft of the motor one vertically penetrates into the right bottom cavity, and the driving gear two in the right bottom cavity is connected; the left part comprises a rotating seat and a left bottom cavity, the rotating seat is beside the hollow cavity and is hollow inside for placing a sample tube; the bottom of the rotating seat is provided with a connecting shaft penetrating into the left bottom cavity and connecting the driven gear two in the left bottom cavity; the driving gear two and the driven gear two are connected with the synchronous belt two.

10. The pH auto test cleaning device of claim 2, wherein, The cleaning unit is arranged on the bottom plate one, the top of the cleaning pipe is in a cylindrical shape, facilitating the insertion of the pH electrode into the cleaning pipe; the other part of the cleaning pipe is in a vertical rectangular shape, facilitating the accommodation of the pH electrode and leaving a spare space; the side of the bottom of the cleaning pipe is provided with an opening communicating with the waste liquid bin for discharging the waste liquid and waste gas in the cleaning pipe into the waste liquid bin.

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