A device for detecting the pH value of drinking water

Abstract

The application relates to the technical field of drinking water detection, in particular to a drinking water pH value detection device which is used for solving the problems that the existing detection means is inconvenient for large-batch detection, and continuous detection is prone to errors; the device comprises a conveying mechanism, a plurality of drinking water to be detected are placed in the conveying mechanism, a detection mechanism comprises two groups of vertical rods, a sleeve ring is slidably connected to the vertical rod, a pH value detection probe is arranged on the outer wall of the sleeve ring, a protrusion is arranged on the inner wall of the sleeve ring, a sliding groove matched with the protrusion is arranged on the side wall of the vertical rod, the upper section and the lower section of the sliding groove are vertically arranged, and the middle section of the sliding groove is obliquely arranged; the side of the vertical rod is provided with wiping cotton; when the protrusion slides on the inclined section of the sliding groove, the pH value detection probe is in contact with the wiping cotton; after one drinking water is detected, the device can wipe off the residual liquid of the pH value detection probe before another drinking water is detected, and the detection accuracy is improved.

Description

Technical Field

[0001] This invention relates to the field of drinking water testing technology, and in particular to a drinking water pH value testing device. Background Technology

[0002] Traditional methods for testing the pH value of drinking water mostly rely on manual operation, requiring testers to use handheld pH meters to test water samples one by one.

[0003] This method is inefficient, especially when dealing with a large number of water samples that need to be tested, as it incurs extremely high manpower and time costs.

[0004] Moreover, manual operation is easily affected by subjective factors, such as the operator's skill level and the accuracy of the readings, which can easily introduce measurement errors.

[0005] In addition, while some existing automated testing equipment has improved testing efficiency to a certain extent, it still has many shortcomings.

[0006] Some equipment has a complex structure and high cost, which is not conducive to large-scale promotion and application; some equipment cannot effectively solve the problem of cleaning the detection probe during the detection process, resulting in cross-contamination between different water samples and inaccurate measurement results.

[0007] For example, if acidic substances remain on the probe after testing a highly acidic water sample, these substances will mix into the new water sample during the next test, changing its original pH value and thus interfering with the measurement. Summary of the Invention

[0008] This invention provides a drinking water pH value detection device to solve the problems of inconvenience in large-scale detection and easy error in continuous detection by existing detection methods.

[0009] To alleviate the above-mentioned technical problems, the technical solution provided by the present invention is as follows:

[0010] A drinking water pH value testing device includes a testing mechanism, the testing mechanism including a pole, and a wiping cotton is provided on the side of the pole;

[0011] A collar is slidably connected to the upright post. A pH value detection probe is installed on the outer wall of the collar. A protrusion is provided on the inner wall of the collar. A sliding groove that mates with the protrusion is opened on the side wall of the upright post. The upper and lower sections of the sliding groove are vertical, and the middle section of the sliding groove is inclined. When the protrusion slides in the inclined section of the sliding groove, the collar rotates 90 degrees. When the protrusion slides from top to bottom in the inclined section of the sliding groove, the pH value detection probe comes into contact with the wiping cotton.

[0012] Preferably, it also includes a switching mechanism, which includes an electric telescopic rod. The output end of the electric telescopic rod is provided with a clamping arm assembly formed by two electric clamping arms. The two electric clamping arms correspond to the two uprights, with one upright as the working upright and the other upright as the spare upright.

[0013] When it is necessary to switch the pH detection probe, release the clamp on the working pole, and then the electric telescopic rod drives the clamp arm assembly to rise to the high position. Another electric clamp arm clamps the spare pole and then drives the pH detection probe on the spare pole to rotate and descend to the low position to perform the detection work.

[0014] Preferably, it further includes a calibration mechanism, which includes a rotating frame with a receiving component at its end, and the receiving component has openings on its side and bottom; the rotating frame reciprocates within a 90-degree range in the horizontal plane, and after the rotating frame rotates 90 degrees, the pH value detection probe to be calibrated rotates into the receiving component.

[0015] Preferably, a rotating rod is connected to the middle of the rotating frame, and a toothed ring is slidably connected to the rotating rod. Both of the electric clamping arms are connected to racks that mesh with the toothed rings. When the two electric clamping arms switch clamping states, the racks drive the rotating rod to rotate 90 degrees.

[0016] Preferably, each of the two racks is connected to a stop bar, and the two end faces of the toothed ring are respectively in contact with the two stop bars and the two electric clamping arms.

[0017] Preferably, the calibration mechanism further includes a piston cylinder for pumping flushing fluid into the housing component.

[0018] Preferably, a piston rod is slidably connected inside the piston cylinder, and an extension plate is connected to the top of the piston rod. The extension plate is connected to the electric clamping arm. When the electric telescopic rod rises and falls, it drives the extension plate to rise and fall, thereby driving the piston rod to slide back and forth inside the corresponding piston cylinder.

[0019] Preferably, a detection unit is formed by two of the uprights and one of the calibration mechanisms, and the drinking water pH detection device is provided with two detection units.

[0020] Preferably, it also includes a conveying mechanism; the conveying mechanism includes a worktable, on which two pulleys are symmetrically rotatably connected, a conveyor belt is drivingly connected between the two pulleys, and a placement frame is connected to the conveyor belt.

[0021] The beneficial effects of this invention are analyzed as follows:

[0022] A drinking water pH testing device includes a testing mechanism, which includes a pole with a wiping cotton on its side. A collar is slidably connected to the pole, and a pH testing probe is installed on the outer wall of the collar. A protrusion is provided on the inner wall of the collar. A groove that mates with the protrusion is formed on the side wall of the pole. The upper and lower sections of the groove are vertical, and the middle section of the groove is inclined. When the protrusion slides in the inclined section of the groove, the collar rotates 90 degrees. When the protrusion slides from top to bottom in the inclined section of the groove, the pH testing probe contacts the wiping cotton.

[0023] The drinking water to be tested moves in turn to the lower part of the pH detection probe. When the conveying mechanism transfers the drinking water to the position directly opposite the upright, the collar on the upright is at the top of the upright. Then the collar slides down the upright, and the protrusion inside the collar slides in the groove, allowing the collar to rotate 90 degrees after moving down, so that the pH detection probe can be inserted into the container holding the drinking water to detect the pH value of the drinking water. After the pH value of the drinking water in the current container is detected, the collar rises again. The wiping cotton fixed on the side of the upright can contact the pH detection probe when the collar rotates 90 degrees, thereby wiping away the drinking water from the previous container that is adhering to the pH detection probe, ensuring that the pH value measurement of the next drinking water will not be interfered with. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of the present invention, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the conveying mechanism structure of the present invention;

[0027] Figure 3 This is a schematic diagram of the structure at the column of the present invention;

[0028] Figure 4 This is a schematic diagram of the structure of the wiping cotton part of the present invention;

[0029] Figure 5 This is a schematic diagram of the structure of the electric telescopic pole of the present invention;

[0030] Figure 6 This is a schematic diagram of the structure of the electric clamping arm of the present invention;

[0031] Figure 7 This is a schematic diagram of the calibration mechanism of the present invention;

[0032] Figure 8 For the present invention Figure 7 A schematic diagram of the structure of part A;

[0033] Figure 9 This is a schematic diagram of the structure of the placement rack of the present invention.

[0034] icon:

[0035] 100. Conveying mechanism; 110. Workbench; 120. Water tank; 121. Partition; 130. Pulley; 140. Conveyor belt; 141. Placement rack; 150. Circulating pump; 200. Detection mechanism; 210. Upright pole; 211. Slide chute; 220. Collar; 221. Protrusion; 230. pH value detection probe; 240. Wiping cotton; 300. Switching mechanism; 310. Electric telescopic rod; 320. Electric clamping arm; 330. Arc-shaped gripper; 34. 0. Rotary ring; 400. Calibration mechanism; 410. Rotating rod; 420. Gear ring; 430. Rack; 431. Stop bar; 440. Rotating frame; 450. Receiving component; 451. Rubber baffle; 460. Drain pipe; 470. Piston cylinder; 471. Piston rod; 472. Extension plate; 473. Spring; 474. Extraction pipe; 475. Discharge pipe; 500. Sorting mechanism; 510. Neutral gripper; 520. Alkaline gripper; 530. Acidic gripper. Detailed Implementation

[0036] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0037] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0039] Furthermore, the terms “first,” “second,” and “third” are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections or indirect connections through an intermediate medium; and they can be internal connections between two components.

[0041] Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0042] like Figures 1-9 As shown, this application provides a drinking water pH testing device, including a conveying mechanism 100, on which multiple bottles of drinking water to be tested are placed. It also includes a testing mechanism 200, which includes two sets of uprights 210. A collar 220 is slidably connected to each upright 210. A pH testing probe 230 is mounted on the outer wall of the collar 220. A protrusion 221 is provided on the inner wall of the collar 220. A groove 211 that mates with the protrusion 221 is formed on the side wall of the upright 210. The upper and lower sections of 211 are both vertically arranged, and the middle section of the chute 211 is inclined. When the protrusion 221 slides in the inclined section of the chute 211, the collar 220 rotates 90 degrees. When the protrusion 221 slides from bottom to top in the inclined section of the chute 211, the conveying mechanism 100 conveys the drinking water to be tested to the testing position. The side of the upright 210 is provided with a wiping cotton 240. When the protrusion 221 slides in the inclined section of the chute 211, the pH value detection probe 230 contacts the wiping cotton 240.

[0043] The working principle of the drinking water pH detection device provided in this embodiment is as follows:

[0044] The various drinking water samples to be tested are placed in separate containers, such as glass test tubes. These test tubes are placed on a conveying mechanism 100, which transports the samples. The conveying mechanism 100 moves the distance between adjacent samples in turn, allowing the samples to alternately move to the lower part of the pH detection probe 230. When the conveying mechanism 100 transfers the drinking water to a position directly opposite the upright rod 210, the collar 220 on the rod 210 is at its uppermost position. The collar 220 then moves along the upright rod 210... As the collar 220 slides downwards, the protrusion 221 inside the collar 220 slides within the groove 211, allowing the collar 220 to rotate 90 degrees after moving downwards, thus inserting the pH value detection probe 230 into the container holding drinking water to detect the pH value of the drinking water. After the pH value of the drinking water in the current container is detected, the collar 220 rises again. When the pH value detection probe 230 is removed from the container holding drinking water, the conveying mechanism 100 conveys the drinking water to be tested again, so that the next drinking water to be tested moves to the position directly opposite the upright 210.

[0045] The chute 211 has a vertical section and an inclined section. When the protrusion 221 slides from the vertical section to the inclined section, the collar 220 can rotate 90 degrees. The wiping cotton 240 fixedly placed on the side of the upright 210 can contact the pH value detection probe 230 when the collar 220 rotates 90 degrees, so that the drinking water from the previous container adhering to the pH value detection probe 230 is wiped off, ensuring that the pH value measurement of the next drinking water will not be interfered with.

[0046] A groove is made in the middle of the wiping cotton 240, and the pH value detection probe 230 passes through the inside of this groove to ensure the wiping effect and avoid the residue of liquid droplets. The wiping cotton 240 is replaced or dried periodically according to the usage time and the characteristics of the materials used.

[0047] Both sets of uprights 210 are equipped with pH detection probes 230, which allows the pH value of the same drinking water to be measured twice, thereby reducing the possibility of measurement error.

[0048] Regarding the structure of the switching mechanism 300, specifically:

[0049] The switching mechanism 300 includes an electric telescopic rod 310. Two uprights 210 are grouped together, and two electric telescopic rods 310 are respectively positioned at the midpoint between the corresponding two uprights 210. Two electric clamping arms 320 are symmetrically connected to the output end of the electric telescopic rod 310. Arc-shaped clamping claws 330 are connected to the electric clamping arms 320, and a rotating ring 340 is rotatably connected to the collar 220. When one arc-shaped clamping claw 330 clamps the rotating ring 340, the corresponding pH value detection probe 230 is in working condition. The other arc-shaped clamping claw 330 is away from the rotating ring 340, thus driving one of the collars 220 to move vertically when the electric telescopic rod 310 extends or retracts. When the difference in detection values ​​between the two groups of working pH value detection probes 230 is large, the two electric clamping arms 320 switch clamping states after the electric telescopic rod 310 extends to its maximum length.

[0050] Only one of the two pH detection probes 230 in the same group is in working condition. That is, one of the two electric clamping arms 320 is in clamping state and the other is in releasing state. When the electric clamping arm 320 is in clamping state, the arc-shaped jaw 330 is engaged with the rotating ring 340, so the extension and retraction of the electric telescopic rod 310 can drive the clamped rotating ring 340 to rise and fall. Since the rotating ring 340 is rotatably connected to the collar 220, it will not interfere with the rotation of the collar 220.

[0051] Based on the interval between the two sets of detection mechanisms 200, the control system sets the interval time for the two sets of pH detection probes 230 to obtain the same pH value of drinking water, thereby corresponding the pH values ​​of the same drinking water in two tests. If the pH value difference is large after the two sets of pH detection probes 230 test the same drinking water, it indicates that the pH detection probes 230 need to be calibrated. At this time, the two pH detection probes 230 in the same set switch working states. After the electric telescopic rod 310 extends to its maximum length, the control system controls the electric clamping arm 320 in the current clamping state to release, and the other electric clamping arm 320 enters the clamping state. Thus, the other collar 220 is driven by the electric telescopic rod 310 to slide vertically. At this time, the pH detection probe 230 that was previously in the working state stops working, and the other pH detection probe 230 starts working. By switching the pH detection probes 230, the detection of the pH value of drinking water will not be interrupted due to the pH detection probes 230, thereby ensuring detection efficiency.

[0052] Regarding the structure of calibration mechanism 400, specifically:

[0053] The calibration mechanism 400 includes a rotating frame 440, with receiving components 450 at both ends of the rotating frame 440. The receiving components 450 have an upper port and a side port. Two rubber baffles 451 are connected to the side ports of the receiving components 450. The rotating frame 440 reciprocates within a 90-degree range. After the rotating frame 440 rotates 90 degrees, the pH value detection probe 230 in the direction of rotation of the rotating frame 440 pushes the rubber baffles 451 and moves into the corresponding receiving component 450.

[0054] After switching, the pH detection probe 230, which has stopped working, then enters the calibration state. The calibration mechanism 400 of this embodiment can perform immersion cleaning and activation treatment to eliminate the electrode memory effect of the pH detection probe 230. When the pH detection probe 230 is in a non-working state, the rotating frame 440 rotates toward the pH detection probe 230 in a non-working state. At this time, the pH detection probe 230 can push the two rubber baffles 451 of the receiving component 450 to deform and pass through the gap between the two rubber baffles 451 into the receiving component 450. After the pH detection probe 230 enters the receiving component 450, calibration can then be performed.

[0055] The rubber baffle 451 can also be replaced by other deformable and recoverable non-magnetic materials, as long as it can ensure that the pH value detection probe 230 enters and exits the housing component 450 and ensure that the rinsing liquid or other liquids in the housing component 450 do not splash out.

[0056] Among the optional methods in this embodiment, the more preferred one is:

[0057] A rotating rod 410 is connected to the middle of the rotating frame 440. A gear ring 420 is slidably connected to the rotating rod 410. A rack 430 that meshes with the gear ring 420 is connected to each of the two electric clamping arms 320. When the two electric clamping arms 320 switch clamping states, the rack 430 drives the rotating rod 410 to rotate ninety degrees.

[0058] Two pH detection probes 230 in the same group, one in working state and the other in calibration state. When the two electric clamping arms 320 switch clamping states, the relative position of the two electric clamping arms 320 drives the two racks 430 to move synchronously and in opposite directions. As a result, the two racks 430 drive the toothed ring 420 to rotate 90 degrees. At this time, the toothed ring 420 drives the rotating rod 410 to rotate, which in turn drives the rotating frame 440 to rotate 90 degrees, so that the replaced pH detection probe 230 can be in calibration state.

[0059] Among the optional methods in this embodiment, the more preferred one is:

[0060] Each of the two racks 430 is connected to a stop bar 431, and the two ends of the toothed ring 420 are respectively in contact with the two stop bars 431 and the two electric clamping arms 320.

[0061] Since the electric clamping arm 320 rises and falls in tandem with the extension and retraction of the electric telescopic rod 310, the extension and retraction of the electric telescopic rod 310 can drive the toothed ring 420 to slide on the rotating rod 410 via the electric clamping arm 320 and the stop bar 431, ensuring that the rack 430 can always be engaged with the toothed ring 420, so that it can respond in time when switching the pH detection probe 230. The toothed ring 420 is provided with a key, and the side wall of the rotating rod 410 is provided with a keyway that fits with the key gap, ensuring that the toothed ring 420 can slide relative to the rotating rod 410 without relative rotation.

[0062] Among the optional methods in this embodiment, the more preferred one is:

[0063] The calibration mechanism 400 also includes four piston cylinders 470 corresponding to four housing components 450. The piston cylinders 470 are connected to an extraction pipe 474 and a discharge pipe 475. Both the extraction pipe 474 and the discharge pipe 475 are equipped with a one-way valve. The extraction pipe 474 is connected to an external flushing fluid, and the discharge pipe 475 is connected to a nearby housing component 450. The bottom of the housing component 450 is connected to a drain pipe 460. A piston rod 471 is slidably connected inside the piston cylinder 470 by a spring 473. An extension plate 472 is connected to the top of the piston rod 471. After the electric clamping arm 320 moves away from the corresponding rotating ring 340, the electric telescopic rod 310 extends and retracts, driving the piston rod 471 to reciprocate and slide inside the corresponding piston cylinder 470 through the non-clamping electric clamping arm 320.

[0064] When the electric clamping arm 320 is not clamping, the corresponding pH detection probe 230 is in a calibration state. This pH detection probe 230 is located within the corresponding receiving component 450. When the electric clamping arm 320 ceases its clamping action, the overall width of the electric clamping arm 320 increases, allowing it to contact the extension plate 472 on the piston rod 471 corresponding to this receiving component 450. Thus, during the reciprocating extension and retraction of the electric telescopic rod 310, another pH detection probe 230 is activated, while the electric clamping arm 320 in its non-clamping state... The extension plate 472 can continuously push the corresponding piston rod 471, causing the piston rod 471 to slide back and forth in the corresponding piston cylinder 470. This allows the piston cylinder 470 to draw up the rinsing fluid through the extraction pipe 474 and discharge the rinsing fluid into the receiving component 450 through the discharge pipe 475. This allows the pH value detection probe 230 inside the receiving component 450 to be rinsed. The rinsing fluid after rinsing the pH value detection probe 230 is discharged from the receiving component 450 through the drain pipe 460, preventing excessive rinsing fluid from remaining in the receiving component 450 and overflowing.

[0065] Regarding the structure of the conveying mechanism 100, specifically:

[0066] The conveying mechanism 100 includes a workbench 110, on which two pulleys 130 are symmetrically rotatably connected. A conveyor belt 140 is connected between the two pulleys 130. A placement rack 141 is connected to the conveyor belt 140, and the drinking water to be tested is placed on the placement rack 141.

[0067] Two pulleys 130 are driven by a motor. When the pulleys 130 rotate, they can drive the conveyor belt 140 to move, thereby moving the drinking water containers on the placement rack 141 on the conveyor belt 140. The control system controls the motor to start and stop intermittently. Each time the motor runs, it transports the drinking water containers to the placement rack 141 at intervals. Then the motor stops running, and the electric telescopic rod 310 begins to shorten. When the electric telescopic rod 310 is shortened and then extended to its maximum length, the motor starts again and repeats the above actions.

[0068] Among the optional methods in this embodiment, the more preferred one is:

[0069] The conveying mechanism 100 also includes a water tank 120, with two pulleys 130 located inside the water tank 120, and the side wall of the container of drinking water to be tested is in contact with the inner wall of the water tank 120.

[0070] The water tank 120 is filled with constant temperature water, and a temperature control device, such as a heating wire or a cooling plate, can be installed in the water tank 120 to keep the water temperature in the water tank 120 constant, so that the temperature of the drinking water to be tested is maintained after it is placed in the water tank 120, thereby eliminating the error factor of temperature on the pH value detection result.

[0071] The side of the shelf 141 has a notch through which the drinking water container fits against the inner wall of the sink 120.

[0072] Among the optional methods in this embodiment, the more preferred one is:

[0073] A partition 121 is provided in the middle of the two pulleys 130 inside the water tank 120. A circulation pump 150 is connected to the workbench 110. The extraction end and the pumping end of the circulation pump 150 are respectively connected to the two sides of the partition 121. When the difference between the detection values ​​of the two sets of pH value detection probes 230 in working state is large, the pumping speed of the circulation pump 150 increases.

[0074] The circulation pump 150 and the baffle 121 ensure that the water in the water tank 120 is in a flowing state, thereby ensuring the temperature uniformity inside the water tank 120. When the pH value detection probe 230 switches to the working state, the pump speed of the circulation pump 150 increases, which speeds up the water flow in the water tank 120, ensuring the temperature uniformity everywhere. This eliminates the influence of temperature when measuring the water in the drinking water container again after switching the pH value detection probe 230.

[0075] Regarding the structure of classification agency 500, specifically:

[0076] The sorting mechanism 500 includes a neutral gripper 510, an alkaline gripper 520, and an acidic gripper 530 that slide on the worktable 110. All three grippers (neutral, alkaline, and acidic) are movable into the water tank 120. The distance between the neutral gripper 510 and the detection mechanism 200 on the same side is a first distance; the distance between the alkaline gripper 520 and the detection mechanism 200 on the same side is a second distance; and the distance between the acidic gripper 530 and the detection mechanism 200 on the same side is a third distance. After detection... If the drinking water is neutral, and the testing mechanism 200 moves a first distance towards the neutral gripper 510, the neutral gripper 510 will pick up the corresponding drinking water container. If the tested drinking water is alkaline, and the testing mechanism 200 moves a second distance towards the alkaline gripper 520, the alkaline gripper 520 will pick up the corresponding drinking water container. If the tested drinking water is acidic, and the testing mechanism 200 moves a third distance towards the acidic gripper 530, the acidic gripper 530 will pick up the corresponding drinking water container.

[0077] The sorting mechanism 500 can classify drinking water containers according to the measured pH value. If the pH value detection probe 230 does not switch after two measurements of the same drinking water, the sorting action is performed. The control system controls the neutral gripper 510, alkaline gripper 520 and acidic gripper 530 to grab and classify drinking water with different pH values, thereby facilitating subsequent work.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for detecting the pH of drinking water, characterized in that: Including detection mechanism (200), the detection mechanism (200) includes vertical rod (210), the side of vertical rod (210) is provided with wiping cotton (240); The outer wall of the sleeve ring (220) is provided with a pH value detection probe (230), the inner wall of the sleeve ring (220) is provided with a convex (221), the side wall of the vertical rod (210) is provided with a sliding groove (211) matched with the convex (221), the upper and lower sections of the sliding groove (211) are vertical, the middle section of the sliding groove (211) is inclined, the sleeve ring (220) rotates ninety degrees when the convex (221) slides in the inclined section of the sliding groove (211), and the pH value detection probe (230) contacts the wiping cotton (240) when the convex (221) slides from top to bottom in the inclined section of the sliding groove (211). It also includes a switching mechanism (300), the switching mechanism (300) includes an electric telescopic rod (310), the output end of the electric telescopic rod (310) is provided with a clamping arm group formed by two electric clamping arms (320), two electric clamping arms (320) correspond to two vertical rods, one of which is a working vertical rod, and the other is a standby vertical rod. When the pH value detection probe (230) needs to be switched, loosen the clamping of the working vertical rod, then the electric telescopic rod (310) drives the clamping arm group to rise to the high position, the other electric clamping arm (320) clamps the standby vertical rod and then drives the pH value detection probe (230) on the standby vertical rod to rotate and descend to the low position and then performs the detection work. It also includes a calibration mechanism (400), the calibration mechanism (400) includes a rotating frame (440), the end of the rotating frame (440) is provided with a receiving part (450), the side and bottom of the receiving part (450) are open; The rotating frame (440) reciprocates within ninety degrees in the horizontal plane, and after the rotating frame (440) rotates ninety degrees, the calibrated pH value detection probe (230) rotates into the receiving part (450); The middle part of the rotating frame (440) is connected with a rotating rod (410), the rotating rod (410) is connected with a gear ring (420) through key sliding, two electric clamping arms (320) are connected with a rack (430) engaged with the gear ring (420), when the two electric clamping arms (320) switch the clamping state, the rack (430) drives the rotating rod (410) to rotate ninety degrees.

2. The pH detecting device for drinking water according to claim 1, characterized in that: Two racks (430) are connected with a blocking bar (431), and the two end faces of the gear ring (420) are respectively attached to two blocking bars (431) and two electric clamping arms (320).

3. The pH detection device for drinking water according to claim 2, characterized in that: The calibration mechanism (400) also includes a piston cylinder (470), which is used to pump washing liquid to the receiving part (450).

4. The pH detection device for drinking water according to claim 3, characterized in that: The piston rod (471) is slidably connected in the piston cylinder (470), and the top of the piston rod (471) is connected with an extension plate (472), which is connected with the electric clamping arm (320), so that when the electric telescopic rod (310) is lifted, the extension plate (472) is lifted to drive the piston rod (471) to reciprocate in the corresponding piston cylinder (470).

5. The pH detection device for drinking water according to claim 4, characterized in that: Two of the vertical rods (210) and one of the calibration mechanism (400) form a detection unit, and the drinking water pH value detection device is provided with two detection units.

6. The pH detection device for drinking water according to claim 5, characterized in that: The conveying mechanism (100) comprises a workbench (110), two pulleys (130) are symmetrically and rotatably connected to the workbench (110), a conveying belt (140) is transmissionally connected between the two pulleys (130), and a placing rack (141) is connected to the conveying belt (140).

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