Water pH value detection device based on pH test paper

Abstract

The invention discloses a water pH value detection device based on pH test paper, and relates to the field of water quality detection.The water pH value detection device comprises a filter box, a lifting frame is installed at the top of the filter box, a detection frame is connected to the lower surface of the lifting frame, and a filter screen is connected to the interior of the filter box; a connecting base is connected to the top of the bottom frame, a storage box is installed at the top of the connecting base, and a collecting mechanism for collecting test paper is arranged on the side face of the connecting base. According to the water pH value detection device based on the pH test paper, the friction roller drives the test paper to move to the position between the first positioning block and the second positioning block through rotary motion for feeding, the automatic feeding function of the detection device is achieved, and the use convenience and efficiency of the detection device are improved; the second positioning block can be extruded and fixed through the first positioning block when moving to the side face of the test paper, on the contrary, the test paper can be loosened when the movable block rotates to the side face of the tensioning groove from the movable block, water at three different depths can be detected at the same time, and the detection efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of water quality detection, and in particular to a water quality acidity and alkalinity detection device based on pH test paper. Background Art

[0002] Water quality testing refers to the measurement and analysis of the physical, chemical and biological properties of water bodies through various methods and instruments to evaluate the quality and safety of water bodies. The test usually uses pH test paper, which is a simple tool for measuring the acidity and alkalinity of a solution. It usually consists of a paper strip coated with indicators that change color at different pH values, allowing users to intuitively read the pH value of the solution. The detection device is a device that uses pH test paper to perform water quality testing, thereby improving the efficiency of water quality testing.

[0003] At present, there are still some shortcomings in the water quality pH detection device, such as low detection efficiency, most processes require manual operation, and there are many impurities in the water quality, which affects the detection accuracy: In order to overcome the low detection efficiency, the Chinese patent of prior art 1 (publication number: CN115639148A) discloses a water quality pH high-efficiency determination device, which can achieve the effect of high-efficiency filtration of the water to be determined through a coarse filter, a fine filter, a glass fiber mesh, a second motor, a stirring rod and a stirring blade, and realizes automatic detection of the pH of water through a first motor, a driving wheel, a synchronous belt, a driven wheel, a roller and a moving block, thereby reducing manual labor, improving the efficiency of pH detection, and solving the problem of low detection efficiency mentioned above; In order to overcome the problem of more impurities in water quality, the Chinese patent of prior art 2 (publication number: CN212031453U) discloses an environmentally friendly intelligent water quality detection device, which uses multiple sensors to detect water quality instead of the traditional chemical method to detect water quality. The detection method is more environmentally friendly and does not require further treatment of wastewater after detection. At the same time, the detection results are more comprehensive and the work efficiency is higher, which solves the problem of more impurities in water quality mentioned above. However, the pH detection devices currently used still have certain shortcomings. Existing technology 1 reduces manual labor, but the clamping and loading of the test paper still requires manual operation, which is difficult for the machine to complete independently, thus affecting the detection efficiency. Secondly, although existing technology 2 has further improved the detection efficiency, it is difficult to detect water of different depths at the same time, and repeated tests are required, which will also affect the detection efficiency. Therefore, it is necessary to improve the existing structure. Summary of the invention

[0004] The purpose of the present invention is to provide a water quality acidity and alkalinity detection device based on pH test paper, so as to solve the problems proposed in the above background technology that the detection device is not convenient for collecting the test paper after detection, the test paper needs to be clamped manually, and it is not convenient to detect water quality at different depths at the same time.

[0005] To achieve the above object, the present invention provides the following technical solution: a water quality acidity and alkalinity detection device based on pH test paper, comprising a filter box, a lifting frame is installed on the top of the filter box, a detection frame is connected to the lower surface of the lifting frame, and a filter screen is connected inside the filter box; The top of the filter box is connected to a base frame, the top of the base frame is connected to a connecting seat, a storage box is installed on the top of the connecting seat, and a collecting mechanism for collecting test papers is arranged on the side of the connecting seat; Three sets of external blocks are fixed on the left side of the storage box, and a feeding mechanism for improving the efficiency of pH detection is arranged inside the external blocks; One side of the detection frame is rotatably connected to a first gear through a motor, the bottom of the first gear is meshedly connected to a second gear, and a clamping mechanism for improving the accuracy of pH detection is arranged inside the detection frame.

[0006] Furthermore, the collecting mechanism includes a fixed block, and the fixed block is fixed on the left side of the base frame. A rotating rod is rotated through the fixed block, and a first pulley is fixed to the left end of the rotating rod.

[0007] Furthermore, an extrusion rod is fixed to the right end of the rotating rod, an extrusion block is slidably arranged on the surface of the extrusion rod, a connecting block is fixed to a side of the extrusion block close to the connecting seat, and the connecting block is fixed to the side of the connecting seat.

[0008] Furthermore, the connecting blocks are symmetrically distributed about the center of the connecting seat, a second pulley is fixed on the outside of the second gear, a transmission belt is connected between the second pulley and the first pulley, the second pulley, the first pulley and the transmission belt are transmission connected, an electric push rod is installed on the top of the filter box near the base frame, an extrusion wheel is fixed on the top of the electric push rod, the extrusion wheel passes through the surface of the transmission belt, a guide rod is fixed on the side of the extrusion wheel close to the electric push rod, and the guide rod passes through and slides inside the filter box.

[0009] Furthermore, the upper surface of the base frame is symmetrically provided with sliding grooves, a sliding block slides through the inside of the sliding groove, the sliding block is fixed to the bottom of the connecting seat, the bottom of the sliding block is connected to a first roller, and the first roller is rollingly connected to the sliding groove.

[0010] Furthermore, the feeding mechanism includes a placement groove, which is opened on the left side of the external block. A push block is connected to the inside of the placement groove, a guide block is fixed inside the push block, and the guide block slides through the placement groove, a tension spring is connected between the guide block and the external block, a friction roller is connected to the inside of the external block through rotation of a motor, the friction roller is fitted with the test paper, and a guide groove is opened through the top of the placement groove.

[0011] Furthermore, the clamping mechanism includes a rotating roller, and the rotating roller rotates through the inside of the detection frame, the second gear is fixed to the end of the rotating roller close to the transmission belt, three first positioning blocks are fixed on the surface of the rotating roller, extrusion rings are fixed on both sides of the detection frame, and a rotating roller rotates through the inside of the extrusion ring.

[0012] Furthermore, a tensioning groove is provided on the inner side of the extrusion ring, a movable groove is provided inside the rotating roller, a movable rod slides through the movable groove, movable blocks are fixed at both ends of the movable rod, a second positioning block is fixed on the surface of the movable rod, the second positioning block slides through the movable groove, and three groups of second positioning blocks are provided.

[0013] Furthermore, a spring is connected between the second positioning block and the rotating roller, a second roller is connected to the surface of the movable block, the second roller is rollingly connected to the inner wall of the extrusion ring, and the second roller is centrally symmetrically distributed about the movable block.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. In the water quality acidity and alkalinity detection device based on PH test paper, the test paper can fall into the cavity of the storage box through the clamping mechanism, so that the test paper after the test is collected. The friction roller drives the test paper to move between the first positioning block and the second positioning block through rotational motion for loading, realizing the automatic loading function of the detection device, improving the convenience and efficiency of the detection device. When the second positioning block moves to the side of the test paper, it can be squeezed and fixed by the first positioning block. On the contrary, when the movable block rotates from the movable block to the side of the tensioning groove, the test paper can be loosened, and water at three different depths can be tested at the same time, improving the detection efficiency; 2. An extrusion rod is provided, through which the reciprocating motion of the connecting seat can be realized, effectively transmitting power, reducing the need for complex parts and reducing production costs; 3. A second pulley, a transmission belt and a first pulley are provided, and the transmission ratio of the second pulley to the first pulley is set, which can improve the adaptability of the components and reduce the difficulty of operation; 4. An electric push rod is provided, and the extension of the electric push rod can maintain the tension of the transmission belt between the second pulley and the first pulley, preventing the transmission belt from loosening when the test frame drives the test paper to move downward, thereby improving the operating efficiency; 5. A guide groove is provided, through which the test paper can be guided, so that the test paper can be stably inserted between the first positioning block and the second positioning block, without the need for multi-angle operation and loading, and is more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall front-view stereoscopic structure of the present invention; Figure 2 This is an enlarged three-dimensional structural schematic diagram of the filter box of the present invention; Figure 3 It is a schematic diagram of the enlarged three-dimensional structure of the lifting frame of the present invention; Figure 4 This is an enlarged three-dimensional structural schematic diagram of the storage box of the present invention; Figure 5 It is an enlarged three-dimensional structural schematic diagram of the transmission belt of the present invention; Figure 6 This is a schematic diagram of the split three-dimensional structure of the chassis of the present invention; Figure 7 It is a schematic diagram of the cross-sectional three-dimensional structure of the external connection block of the present invention; Figure 8 It is a schematic diagram of an enlarged three-dimensional structure of the rotating roller of the present invention; Fig. 9 It is a schematic diagram of the cross-sectional three-dimensional structure of the rotating roller of the present invention; Fig.10 It is a schematic diagram of an enlarged three-dimensional structure of an extrusion ring of the present invention; Fig.11 It is a schematic diagram of the enlarged three-dimensional structure of the second roller of the present invention.

[0016] In the figure: 1, filter box; 2, lifting frame; 3, filter screen; 4, detection frame; 101, bottom frame; 102, connecting seat; 103, storage box; 104, fixing block; 105, rotating rod; 106, first pulley; 107, extrusion rod; 108, extrusion block; 109, connecting block; 110, second pulley; 111, transmission belt; 112, electric push rod; 113, extrusion wheel; 114, guide rod; 115, sliding groove; 116, sliding block; 117 , first roller; 118, external block; 119, placement slot; 120, push block; 121, guide block; 122, tension spring; 123, friction roller; 124, guide slot; 401, first gear; 402, second gear; 403, rotating roller; 404, first positioning block; 405, extrusion ring; 406, movable slot; 407, movable rod; 408, movable block; 409, second positioning block; 410, spring; 411, tensioning slot; 412, second roller. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Embodiment 1:

[0019] like Figure 1-Figure 6 The technical solution shown in the figure, the present invention provides the following technical solution: In order to solve the problem that the detection device is inconvenient to collect the test paper after detection, which affects the detection efficiency, a collection mechanism is disclosed: The filter box 1 comprises a filter box 1, a lifting frame 2 is installed on the top of the filter box 1, a detection frame 4 is connected to the lower surface of the lifting frame 2, a filter screen 3 is connected inside the filter box 1, a bottom frame 101 is connected to the top of the filter box 1, a connecting seat 102 is connected to the top of the bottom frame 101, a storage box 103 is installed on the top of the connecting seat 102, a collecting mechanism for collecting test papers is arranged on the side of the connecting seat 102, three sets of external blocks 118 are fixed on the left side of the storage box 103, a feeding mechanism for improving the efficiency of pH detection is arranged inside the external blocks 118, and a side of the detection frame 4 is provided with a filter screen 3, a bottom frame 101 is connected to the top of the filter box 101, a connecting seat 102 is connected to the top of the connecting seat 102, a storage box 103 is installed on the top of the connecting seat 102, a collecting mechanism for collecting test papers is arranged on the side of the connecting seat 102, three sets of external blocks 118 are fixed on the left side of the storage box 103, a feeding mechanism for improving the efficiency of pH detection is arranged inside the external blocks 118, and a side of the detection frame 4 is provided with a filter screen 3, a bottom frame 101 is connected to the top of the bottom frame 101, a connecting seat 102 is connected to the top of the connecting seat 102, a storage box 103 is installed on the top of the connecting seat 102, a collecting mechanism for collecting test papers is arranged on the side of the connecting seat 102, and a collecting mechanism for collecting test papers is arranged on the left side of the storage box 103. A first gear 401 is connected to the rotation of the motor, and a second gear 402 is meshed at the bottom of the first gear 401. A clamping mechanism for improving the accuracy of pH detection is arranged on the inner side of the detection frame 4. The collecting mechanism includes a fixed block 104, and the fixed block 104 is fixed on the left side of the base frame 101. A rotating rod 105 is rotated through the fixed block 104. A first pulley 106 is fixed to the left end of the rotating rod 105. An extrusion rod 107 is fixed to the right end of the rotating rod 105. An extrusion block 108 slides on the surface of the extrusion rod 107. A connecting block 109 is fixed to one side of the connecting seat 108 near the connecting seat 102. The connecting block 109 is fixed to the side of the connecting seat 102. The connecting block 109 is symmetrically distributed about the center of the connecting seat 102. A second pulley 110 is fixed to the outside of the second gear 402. A transmission belt 111 is connected between the second pulley 110 and the first pulley 106. The second pulley 110, the first pulley 106 and the transmission belt 111 are transmission connected. An electric push rod 112 is installed on the top of the filter box 1 near the bottom frame 101. The electric push rod 112 An extrusion wheel 113 is fixed at the top of 12, and the extrusion wheel 113 penetrates the surface of the transmission belt 111. A guide rod 114 is fixed on the side of the extrusion wheel 113 close to the electric push rod 112. The guide rod 114 penetrates and slides inside the filter box 1. The upper surface of the bottom frame 101 is symmetrically provided with sliding grooves 115. A sliding block 116 slides through the sliding groove 115. The sliding block 116 is fixed at the bottom of the connecting seat 102. The bottom of the sliding block 116 is connected to a first roller 117, and the first roller 117 is connected to the sliding groove 115 in a rolling manner. When the detection device is in use, water of different depths is distributed and poured into different cavities of the filter box 1. The water can flow from the left side to the right side through the inclined surface at the bottom of the filter box 1, and then the impurities in the water are filtered through the same filtering method. After the filtration is completed, the test paper is placed in the water for detection. During the detection, the detection frame 4 can move downward under the action of the lifting frame 2. When the detection frame 4 moves downward, the positions of the second pulley 110 and the first pulley 106 will change. At this time, the electric push rod 112 can push the extrusion wheel 113 to move upward. When the extrusion wheel 113 moves, it can drive the guide rod 114 to slide through the filter box 1. When the extrusion wheel 113 slides to the inner side of the transmission belt 111, it can be squeezed. When the transmission belt 111 is squeezed, it passes through the second pulley 110 and the first pulley 106. The pulley 106 can be kept in a taut state to prevent the transmission belt 111 from loosening and falling off when the detection frame 4 moves down, thereby ensuring the transmission state. The second pulley 110 and the first pulley 106 of the detection device are set according to a transmission ratio of two to one. When the second pulley 110 rotates one circle, the first pulley 106 rotates half a circle. When the device is in use, the first gear 401 is driven to rotate through the output end of the motor. When the first gear 401 rotates, it can drive the second gear 402 to mesh and rotate. When the second gear 402 meshes and rotates, it can drive the rotating roller 403 to rotate. When the rotating roller 403 rotates, it can rotate through the detection frame 4. When the second gear 402 rotates, it can drive the second pulley 110 to rotate. When the second pulley 110 rotates, it can drive the second pulley 110 to rotate. 111 can drive the first pulley 106 to rotate, and when the first pulley 106 rotates, it can drive the rotating rod 105 to rotate. When the rotating rod 105 rotates, it can rotate through the fixed block 104. When the rotating rod 105 rotates, the pressure resistance drives the extrusion rod 107 to rotate. When the extrusion rod 107 rotates, it can squeeze the inner wall of the extrusion block 108. When the extrusion block 108 is squeezed, it can drive the connecting block 109 to move. When the connecting block 109 moves, it can pull the connecting seat 102 to move. When the connecting seat 102 moves, it can drive the sliding block 116 to move. When the sliding block 116 moves, it can drive the first roller 117 to move. When the first roller 117 moves, it can generate friction with the inner wall of the sliding groove 115. When the first roller 117 rubs, it can move on the sliding block 116. The internal rolling reduces the wear of the sliding block 116 and the sliding groove 115 during the rolling. When the connecting seat 102 slides, it can drive the storage box 103 to slide. When the storage box 103 slides, it can change the distance between the two inner cavities and the test paper. After the distance is changed, the rotating roller 403 can drive the test paper to rotate to the inside of a cavity of the storage box 103. At this time, the rotating roller 403 can lose the clamping force on the test paper through the characteristics of the clamping mechanism. After losing the clamping force, the test paper can fall into a cavity of the storage box 103 under the action of gravity. When the rotating roller 403 drives the test paper to rotate the second circle, the storage box 103 can move its position so that the test paper can fall into another inner cavity of the storage box 103. In this way, the test paper after the test is completed can be collected.Improves the convenience and efficiency of using the detection device.

[0020] Embodiment 2:

[0021] like Figure 3 and Figure 7 The technical solution shown in the figure, the present invention provides the following technical solution: In order to solve the problem that the test paper of the detection device needs to be manually clamped, which reduces the efficiency, a feeding mechanism is disclosed: The feeding mechanism includes a placement slot 119, which is arranged on the left side of the external block 118. A push block 120 is connected to the placement slot 119, a guide block 121 is fixed to the push block 120, and the guide block 121 penetrates and slides in the placement slot 119, a tension spring 122 is connected between the guide block 121 and the external block 118, a friction roller 123 is connected to the external block 118 through the rotation of the motor, the friction roller 123 and the test paper are in a fitting connection, a guide slot 124 is penetrated and arranged on the top of the placement slot 119, when the detection device is running, the rotating roller 403 drives the first positioning block 404 and the second positioning block 409 to rotate to the upper surface of the guide slot 124 in an open manner through the characteristics of the clamping mechanism, at this time, the friction roller 123 is driven to rotate through the output end of the motor, and when the friction roller 123 rotates, it can generate friction with the test paper in the placement slot 119, and the test paper can move upward when friction is applied, and the test paper moves up to the guide slot 124. When moving toward the inside of the groove 124, it can change its own angle and direction. After the direction is changed, the test paper can move between the first positioning block 404 and the second positioning block 409, and then the test paper can be clamped and fixed by the characteristics of the clamping mechanism. Finally, the test paper can be driven to move out of the external block 118 under the rotation of the rotating roller 403. After the test paper is moved out of the external block 118, the tension spring 122 can pull the guide block 121 to move by its own elastic force. When the guide block 121 moves, it can slide through the external block 118. When the guide block 121 slides, it can drive the push block 120 to move. When the push block 120 moves, it can push the test paper inside the placement groove 119. When the test paper is pushed to the side of the placement groove 119 close to the friction roller 123, it can be fitted. The friction roller 123 repeats the rotation movement to drive the test paper to be loaded, thereby realizing the automatic loading function of the detection device, and further improving the convenience and efficiency of the use of the detection device.

[0022] Embodiment three:

[0023] like Figure 1 , Figure 8 , Fig. 9 , Fig.10 and Fig.11 The technical solution shown in the figure, the present invention provides the following technical solution: In order to solve the problem that the detection device is inconvenient to detect water quality at different depths at the same time, a clamping mechanism is disclosed: The clamping mechanism includes a rotating roller 403, and the rotating roller 403 rotates through the detection frame 4, the second gear 402 is fixed to the end of the rotating roller 403 close to the transmission belt 111, and three first positioning blocks 404 are fixed on the surface of the rotating roller 403. Extrusion rings 405 are fixed on both sides of the detection frame 4, and the rotating roller 403 rotates through the extrusion ring 405. A tensioning groove 411 is provided on the inner side of the extrusion ring 405, and a movable groove 406 is provided inside the rotating roller 403. A movable rod 407 slides through the movable groove 406, and movable blocks 408 are fixed at both ends of the movable rod 407. The surface of the movable rod 407 is fixed with a first positioning block 404. The second positioning block 409 is slidable inside the movable groove 406, and the second positioning block 409 is provided with three groups, a spring 410 is connected between the second positioning block 409 and the rotating roller 403, a second roller 412 is connected to the surface of the movable block 408, the second roller 412 is rollingly connected to the inner wall of the extrusion ring 405, and the second roller 412 is centrally symmetrically distributed about the movable block 408. When the detection device is used, when the test paper is moved between the three groups of the first positioning block 404 and the second positioning block 409 through the feeding mechanism, the motor rotating roller 403 can be rotated, and the rotating roller 403 can be driven by the rotating roller 403. The movable block 408 rotates, and when the movable block 408 rotates to the inclined surface of the tensioning groove 411, it can be squeezed. When the movable block 408 is squeezed, it can drive the second roller 412 to squeeze the inner wall of the tensioning groove 411. The second roller 412 can rotate through the movable block 408 when squeezing. When the second roller 412 rotates, the smoothness of the squeeze between the movable block 408 and the tensioning groove 411 can be improved, and the wear of the components is reduced. When the movable block 408 is squeezed, it can slide through the movable groove 406. When the movable block 408 slides, it can drive the movable rod 407 to slide. When the movable rod 407 slides, it can drive the second positioning block 409 to move. The second When the positioning block 409 moves to the side of the test paper, it can be squeezed and fixed by the first positioning block 404, and the second positioning block 409 can squeeze the spring 410. On the contrary, when the movable block 408 rotates from the movable block 408 to the side of the tensioning groove 411, the test paper can be loosened. When the test paper is squeezed and fixed, the rotating roller 403 continues to rotate to drive the test paper to move out of the external block 118, and then the test paper is placed in the water for detection. Three water depths of different depths can be detected at the same time, which improves the detection efficiency. The feeding mechanism and the collection mechanism can reduce the manual operation process, which once again improves the convenience of using the detection device.

[0024] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A water quality acidity and alkalinity detection device based on pH test paper, comprising a filter box (1), a lifting frame (2) is installed on the top of the filter box (1), a detection frame (4) is connected to the lower surface of the lifting frame (2), and a filter screen (3) is connected inside the filter box (1). It is characterized by: The top of the filter box (1) is connected to a base frame (101), the top of the base frame (101) is connected to a connecting seat (102), a storage box (103) is installed on the top of the connecting seat (102), a collecting mechanism for collecting test papers is arranged on the side of the connecting seat (102), the collecting mechanism comprises a fixed block (104), and the fixed block (104) is fixed on the left side of the base frame (101), a rotating rod (105) is rotatably penetrated inside the fixed block (104), and a first pulley (106) is fixed to the left end of the rotating rod (105); Three groups of external blocks (118) are fixed on the left side of the storage box (103), and a feeding mechanism for improving the efficiency of pH detection is arranged inside the external blocks (118); One side of the detection frame (4) is rotatably connected to a first gear (401) via a motor, the bottom of the first gear (401) is meshingly connected to a second gear (402), and a clamping mechanism for improving the accuracy of pH detection is provided inside the detection frame (4).

2. A water quality acidity and alkalinity detection device based on pH test paper according to claim 1, characterized in that: An extrusion rod (107) is fixed to the right end of the rotating rod (105), an extrusion block (108) is slidably disposed on the surface of the extrusion rod (107), a connection block (109) is fixed to a side of the extrusion block (108) close to the connection seat (102), and the connection block (109) is fixed to a side of the connection seat (102).

3. A water quality acidity and alkalinity detection device based on pH test paper according to claim 2, characterized in that: The connecting block (109) is symmetrically distributed about the center of the connecting seat (102); a second pulley (110) is fixed on the outside of the second gear (402); a transmission belt (111) is connected between the second pulley (110) and the first pulley (106); the second pulley (110), the first pulley (106) and the transmission belt (111) are in transmission connection; an electric push rod (112) is installed on the top of the filter box (1) close to the base frame (101); an extrusion wheel (113) is fixed on the top of the electric push rod (112); the extrusion wheel (113) penetrates the surface of the transmission belt (111); a guide rod (114) is fixed on the side of the extrusion wheel (113) close to the electric push rod (112); the guide rod (114) penetrates and slides inside the filter box (1).

4. A water quality acidity and alkalinity detection device based on pH test paper according to claim 1, characterized in that: The upper surface of the base frame (101) is symmetrically provided with sliding grooves (115), a sliding block (116) is slidably penetrated inside the sliding groove (115), the sliding block (116) is fixed to the bottom of the connecting seat (102), the bottom of the sliding block (116) is connected to a first roller (117), and the first roller (117) is rollingly connected to the sliding groove (115).

5. A water quality acidity and alkalinity detection device based on pH test paper according to claim 1, characterized in that: The loading mechanism comprises a placement groove (119), wherein the placement groove (119) is opened on the left side of the external block (118), a push block (120) is connected to the inside of the placement groove (119), a guide block (121) is fixed inside the push block (120), and the guide block (121) passes through and slides inside the placement groove (119), a tension spring (122) is connected between the guide block (121) and the external block (118), a friction roller (123) is connected to the inside of the external block (118) through rotation by a motor, and the friction roller (123) is in close contact with the test paper, and a guide groove (124) is opened through the top of the placement groove (119).

6. A water quality acidity and alkalinity detection device based on pH test paper according to claim 1, characterized in that: The clamping mechanism comprises a rotating roller (403), and the rotating roller (403) passes through and rotates inside the detection frame (4); the second gear (402) is fixed to the end of the rotating roller (403) close to the transmission belt (111); three first positioning blocks (404) are fixed on the surface of the rotating roller (403); and extrusion rings (405) are fixed on both sides of the detection frame (4); and the rotating roller (403) passes through and rotates inside the extrusion ring (405).

7. A water quality acidity and alkalinity detection device based on pH test paper according to claim 6, characterized in that: A tensioning groove (411) is provided on the inner side of the extrusion ring (405), a movable groove (406) is provided inside the rotating roller (403), a movable rod (407) slides through the movable groove (406), movable blocks (408) are fixed at both ends of the movable rod (407), a second positioning block (409) is fixed on the surface of the movable rod (407), the second positioning block (409) slides through the movable groove (406), and three groups of second positioning blocks (409) are provided.

8. A water quality acidity and alkalinity detection device based on pH test paper according to claim 7, characterized in that: A spring (410) is connected between the second positioning block (409) and the rotating roller (403), a second roller (412) is connected to the surface of the movable block (408), the second roller (412) is rollingly connected to the inner wall of the extrusion ring (405), and the second roller (412) is centrally symmetrically distributed about the movable block (408).

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