Sampling device for secondary water supply pollution detection

Abstract

The invention discloses a sampling device for secondary water supply pollution detection, and relates to the technical field of sampling equipment.The sampling device comprises a water tank body and a positioning frame, a sampling assembly for extracting water in the water tank body is installed at one end of the water tank body, and the sampling assembly comprises a connecting pipe, a telescopic rod and an electromagnetic pump; and a connecting assembly for extending the telescopic rod is installed at one end of the connecting pipe, a first connecting rod is installed at one end of the positioning frame, the telescopic rod is arranged at one end of the first connecting rod, a material taking cup is placed at the bottom of the electromagnetic pump, and a moving assembly for moving the material taking cup is installed at the bottom of the material taking cup. By arranging the sampling assembly and the connecting assembly, synchronous sampling is conducted on multiple points in the water tank body, the uniformity of water quality detection is improved, by arranging the moving assembly and the pressing assembly, a material taking cup after sampling is sealed, the working efficiency is improved, and water samples can be automatically collected according to the set time interval.

Description

Technical Field

[0001] The invention relates to the technical field of sampling equipment, in particular to a sampling device for secondary water supply pollution detection. Background Art

[0002] Secondary water supply refers to a water supply method in which urban public water supply or water supplied by self-built facilities is stored and pressurized, and then supplied to users or for self-use through pipelines. In the urban water supply system, the pressure of the urban water supply network is limited, and it cannot meet the water demand of some high-rise buildings or areas far away from water sources. In order to solve these problems, secondary water supply facilities are needed to pressurize and store water again to ensure that users can obtain sufficient water pressure and water volume.

[0003] The secondary water supply link may cause water pollution problems due to improper equipment maintenance and untimely water tank cleaning. For example, bacteria and algae may grow inside the water tank, and rusted pipes may also cause excessive metal ions such as iron and manganese in the water, affecting the water quality and the health of residents. Therefore, it is necessary to regularly use sampling equipment to test the water quality in the water tank to avoid affecting the water quality and the health of residents. For the existing sampling of water tanks, the sampler is first tied with a rope and slowly placed in the designated position in the water tank. If water samples are collected at multiple depths, they should be collected from the bottom layer to avoid stirring the upper water samples. When collecting water samples, the water sample should fill the sampling container to avoid residual bubbles.

[0004] Currently, when sampling a larger secondary water supply tank, samples should be taken from different parts of the tank, including the upper, middle and lower parts, to understand the uniformity of the water quality in the tank. However, in real life, when staff take samples from the water in the tank, if they want to achieve uniformity in the tank sampling, the work efficiency will be greatly reduced. Summary of the invention

[0005] Based on this, the purpose of the present invention is to provide a sampling device for secondary water supply pollution detection to solve the technical problems mentioned in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a sampling device for secondary water supply pollution detection, comprising a water tank body and a positioning frame, one end of the water tank body is equipped with a sampling component for extracting water quality in the water tank body, the sampling component comprises a connecting pipe, a telescopic rod and an electromagnetic pump, one end of the connecting pipe is equipped with a connecting component for extending the telescopic rod, one end of the positioning frame is equipped with a first connecting rod, and one end of the first connecting rod is provided with a telescopic rod, a material collection cup is placed at the bottom of the electromagnetic pump, and a moving component for displacing the material collection cup is installed at the bottom of the material collection cup, the moving component comprises a moving rod, a push block and a rack, and one end of the moving component is also provided with a pressing component.

[0007] By adopting the above technical scheme, multiple points in the water tank body are sampled synchronously, and at the same time, the upper, middle and lower parts of the water tank are sampled. The telescopic rod is extended by the connecting component so that the sampling component can achieve multi-point sampling in the water tank body, thereby improving the authenticity of water quality detection. By setting the moving component and the pressing component, the material cup is moved, and the material cup after sampling is sealed to improve work efficiency. Water samples can be automatically collected at set time intervals, and water samples can be continuously collected for multiple time periods to analyze the dynamic changes of water quality, thereby effectively improving the supervision and detection of secondary water supply water quality.

[0008] The present invention is further configured such that a telescopic rod is installed at one end of the connecting pipe, and the telescopic rod is located in the water tank body. The connecting pipes and telescopic rods are in three groups, and the three groups of connecting pipes and telescopic rods are evenly distributed from top to bottom in the water tank body.

[0009] Preferably, the upper, middle and lower parts of the water tank are sampled at the same time, and the telescopic rod is extended through a connecting assembly so that the sampling assembly can achieve multi-point sampling in the water tank body.

[0010] The present invention is further configured such that a protective frame is provided at one end of the connecting pipe, and a driving motor is installed on the inner wall of the protective frame, and a bevel gear group is installed at the output end of the driving motor, a second connecting rod is provided at both ends of the bevel gear group, and bevel gear groups are also provided at both ends of the second connecting rod, and one end of the first connecting rod is connected to the bevel gear group on the outer wall of the water tank body.

[0011] Preferably, the telescopic rod is moved by the first connecting rod to synchronously sample multiple points in the water tank body, and then the inner wall of the protective frame is connected to the driving motor.

[0012] The present invention is further configured as follows: the first connecting rod is a screw rod, and a positioning ring is sleeved on the outer wall of the first connecting rod in the water tank body, and the positioning ring is threadedly connected to the first connecting rod, the other end of the positioning ring is sleeved with a telescopic rod, and a fixing card is installed at one end of the telescopic rod close to the connecting pipe, and one end of the fixing card is connected to the positioning frame, and the first connecting rod and the positioning ring are made of stainless steel.

[0013] As a preferred embodiment, the provision of the fixing card effectively improves the stability of the telescopic rod during movement, and the positioning ring is movably connected to the positioning frame, and the positioning frame limits the position of the positioning ring, thereby improving the stability of the positioning ring during movement.

[0014] The present invention is further configured such that a fixing plate and a limiting plate are installed on the outer wall of the water tank body, and the fixing plate and the limiting plate are movably connected, and a shift rod is installed on the bottom of the limiting plate, one end of the shift rod is connected to the output end of the electric push rod, and a rack is installed on the outer wall of the shift rod, and a full gear is provided on the outer wall of the rack, and the full gear and the rack are meshed.

[0015] Preferably, the electric push rod drives the movement of the shift rod to drive the rotation of the full gear and then the belt to rotate, thereby transmitting kinetic energy and reducing the energy consumption of the device.

[0016] The present invention is further configured such that a push block is installed at one end of the electric push rod, and the push block is in contact with the outer wall of the limit plate, and the push block is sleeved on the outer wall of the shift rod, a plurality of groups of positioning blocks are fixedly installed on the bottom of the limit plate, and the shift rod is movably installed on the inner wall of the positioning block.

[0017] Preferably, the installation of multiple groups of positioning blocks effectively improves the stability of the shifting rod during movement.

[0018] The present invention is further configured such that a belt is sleeved on the central shaft of the full gear, and a driven wheel is sleeved on the other end of the belt, a rotating rod is installed on the top of the driven wheel, and a sleeve is sleeved on the outer wall of the rotating rod.

[0019] Preferably, the fixing plate is movably connected to the rotating rod, and the fixing plate effectively limits the position of the rotating rod.

[0020] The present invention is further configured such that the rotating rod is a screw rod, and the rotating rod is meshed with the inner wall of the sleeve, and a contact block is provided at one end of the sleeve, a discharge bin is provided at one end of the contact block, and a plurality of cup covers are movably installed on the inner wall of the discharge bin.

[0021] Preferably, the discharge bin limits the position of the cup cover, reducing the staff's placement of the cup cover, thereby improving the connection between the cup cover and the material collection cup. The cup cover is sleeved on the outer wall of the material collection cup, and the cup cover is made of rubber. Secondly, the end of the sleeve close to the water tank body is movably connected to the outer wall of the water tank body.

[0022] The present invention is further configured such that a spring is provided at one end of the contact block close to the cup cover, and the spring is connected to the bottom of the contact block.

[0023] Preferably, the spring facilitates adjustment of the length of the contact block, thereby effectively improving the flexibility of the contact block.

[0024] The present invention is further configured such that an impeller may be provided on one end of the inner wall of the telescopic rod close to the water suction port, and an adsorption tube is sleeved on the outer wall of the telescopic rod.

[0025] Preferably, an impeller and an adsorption tube may be provided on one end of the inner wall of the telescopic rod close to the water suction port to effectively expand the adsorption space at each part.

[0026] In summary, the present invention mainly has the following beneficial effects: The present invention synchronously samples multiple points in the water tank body through the arrangement of the sampling component and the connecting component, and simultaneously samples the upper, middle and lower parts of the water tank. The telescopic rod is extended through the connecting component so that the sampling component can realize multi-point sampling in the water tank body, thereby improving the authenticity of water quality detection.

[0027] The present invention moves the material collection cup and seals the material collection cup after sampling through the arrangement of a moving component and a pressing component, thereby improving work efficiency. Water samples can be automatically collected at set time intervals, and water samples for multiple time periods can be continuously collected to analyze dynamic changes in water quality, thereby effectively improving the supervision and detection of secondary water supply quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a perspective schematic diagram of a side sectional view of a water tank body of the present invention; Figure 2 It is a schematic diagram of the position of the sampling component of the present invention; Figure 3 It is a structural distribution diagram of the sampling assembly of the present invention; Figure 4 It is a schematic diagram of the structure of the connection assembly of the present invention; Figure 5 It is a schematic diagram of the structure of the mobile component of the present invention; Figure 6 It is a schematic diagram of the connection between the moving component and the pressing component of the present invention; Figure 7 For the present invention Figure 5 A magnified image of point A; Figure 8 It is a schematic diagram of the positions of the impeller and adsorption tube of the present invention.

[0029] Description of reference numerals: 1. Water tank body; 2. Positioning frame; 3. Sampling assembly; 30. Connecting pipe; 31. Telescopic rod; 310. Impeller; 312. Adsorption tube; 32. Fixing card; 33. Positioning ring; 34. Electromagnetic pump; 4. Connecting assembly; 40. Protective frame; 41. Bevel gear set; 42. First connecting rod; 422. Second connecting rod; 5. Moving assembly; 50. Electric push rod; 51. Fixed plate; 52. Limiting plate; 53. Shifting rod; 54. Positioning block; 55. Push block; 56. Rack; 57. Full gear; 58. Belt; 59. Driven wheel; 6. Material cup; 7. Pressing assembly; 70. Material discharge bin; 71. Rotating rod; 72. Sleeve; 73. Contact block; 8. Cup cover. DETAILED DESCRIPTION

[0030] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0031] The following describes an embodiment of the present invention based on its overall structure.

[0032] See also Figure 1-Figure 7 , including a water tank body 1, a positioning frame 2, a sampling assembly 3 for extracting water quality in the water tank body 1 is installed at one end of the water tank body 1, the sampling assembly 3 includes a connecting pipe 30, a telescopic rod 31 and an electromagnetic pump 34, a connecting assembly 4 for extending the telescopic rod 31 is installed at one end of the connecting pipe 30, a first connecting rod 42 is installed at one end of the positioning frame 2, and the telescopic rod 31 is arranged at one end of the first connecting rod 42, a material collection cup 6 is placed at the bottom of the electromagnetic pump 34, and a moving assembly 5 for displacing the material collection cup 6 is installed at the bottom of the material collection cup 6, the moving assembly 5 includes a moving rod 53, a pushing block 55 and a rack 56, and a pressing assembly is also arranged at one end of the moving assembly 5 Component 7, through the setting of sampling component 3 and connecting component 4, synchronously samples multiple points in the water tank body 1, and at the same time, the upper, middle and lower parts of the water tank are sampled, and the telescopic rod 31 is extended by connecting component 4 so that the sampling component 3 can realize multi-point sampling in the water tank body 1, thereby improving the authenticity of water quality detection, and through the setting of moving component 5 and pressing component 7, the material cup 6 is moved, and the material cup 6 after sampling is sealed to improve work efficiency. Water samples can be automatically collected at set time intervals, and water samples can be continuously collected for multiple time periods to analyze the dynamic changes of water quality, thereby effectively improving the supervision and detection of secondary water supply water quality.

[0033] In the above embodiments, please refer to Figure 1-Figure 3 A telescopic rod 31 is installed at one end of the connecting pipe 30, and the telescopic rod 31 is located in the water tank body 1. The number of the connecting pipes 30 and the telescopic rod 31 is three groups, and the three groups of connecting pipes 30 and the telescopic rod 31 are evenly distributed from top to bottom in the water tank body 1. At the same time, the upper, middle and lower parts of the water tank are connected, and the telescopic rod 31 is extended by the connecting component 4 so that the sampling component 3 can achieve multi-point sampling in the water tank body 1.

[0034] In the above embodiments, please refer to Figure 1-Figure 4A protective frame 40 is provided at one end of the connecting pipe 30, and a driving motor is installed on the inner wall of the protective frame 40, and a bevel gear group 41 is installed at the output end of the driving motor, and second connecting rods 422 are provided at both ends of the bevel gear group 41, and bevel gear groups 41 are also provided at both ends of the second connecting rod 422. One end of the first connecting rod 42 is connected to the bevel gear group 41 on the outer wall of the water tank body 1, and the telescopic rod 31 is driven to move by the first connecting rod 42 to synchronously sample multiple points in the water tank body 1. Secondly, the inner wall of the protective frame 40 is connected to the driving motor.

[0035] In the above embodiments, please refer to Figure 1-Figure 4 The first connecting rod 42 is a screw rod, and the outer wall of the first connecting rod 42 in the water tank body 1 is sleeved with a positioning ring 33, and the positioning ring 33 is threadedly connected to the first connecting rod 42, and the other end of the positioning ring 33 is sleeved with a telescopic rod 31, and a fixing card 32 is installed at one end of the telescopic rod 31 close to the connecting pipe 30, and one end of the fixing card 32 is connected to the positioning frame 2, the first connecting rod 42 and the positioning ring 33 are made of stainless steel, and the setting of the fixing card 32 effectively improves the stability of the telescopic rod 31 during movement, and the positioning ring 33 is movably connected to the positioning frame 2, and the positioning frame 2 limits the position of the positioning ring 33 to improve the stability of the positioning ring 33 during movement.

[0036] In the above embodiments, please refer to Figure 3-Figure 7 A fixing plate 51 and a limiting plate 52 are installed on the outer wall of the water tank body 1, and the fixing plate 51 and the limiting plate 52 are movably connected, and a shift rod 53 is installed at the bottom of the limiting plate 52, one end of the shift rod 53 is connected to the output end of the electric push rod 50, and a rack 56 is installed on the outer wall of the shift rod 53, and a full gear 57 is provided on the outer wall of the rack 56, and the full gear 57 and the rack 56 are meshed, and the movement of the shift rod 53 driven by the electric push rod 50 drives the rotation of the full gear 57 and then the belt 58 rotates, so that the kinetic energy is transmitted, and the energy consumption of the device is reduced.

[0037] In the above embodiments, please refer to Figure 1-Figure 6 A push block 55 is installed at one end of the electric push rod 50, and the push block 55 is in contact with the outer wall of the limit plate 52, and the push block 55 is sleeved on the outer wall of the shift rod 53. A plurality of positioning blocks 54 are fixedly installed at the bottom of the limit plate 52, and the shift rod 53 is movably installed on the inner wall of the positioning block 54. The installation of the plurality of positioning blocks 54 effectively improves the stability of the shift rod 53 during movement.

[0038] In the above embodiments, please refer to Figure 5-Figure 7A belt 58 is provided on the central shaft sleeve of the full gear 57, and a driven wheel 59 is provided on the other end of the belt 58. A rotating rod 71 is installed on the top of the driven wheel 59, and a sleeve 72 is provided on the outer wall of the rotating rod 71. The fixed plate 51 is movably connected with the rotating rod 71, and the fixed plate 51 effectively limits the position of the rotating rod 71.

[0039] In the above embodiments, please refer to Figure 5-Figure 7 The rotating rod 71 is a screw rod, and the rotating rod 71 is meshed with the inner wall of the sleeve 72, and a contact block 73 is provided at one end of the sleeve 72, and a discharge bin 70 is provided at one end of the contact block 73, and a plurality of cup covers 8 are movably installed on the inner wall of the discharge bin 70, and the discharge bin 70 limits the position of the cup covers 8, reducing the placement of the cup covers 8 by the staff, thereby improving the connection between the cup covers 8 and the material taking cup 6, and the cup covers 8 are sleeved on the outer wall of the material taking cup 6, and the cup covers 8 are made of rubber, and secondly, one end of the sleeve 72 close to the water tank body 1 is movably connected to the outer wall of the water tank body 1.

[0040] In the above embodiments, please refer to Figure 5-Figure 7 A spring is provided at one end of the contact block 73 close to the cup cover 8 , and the spring is connected to the bottom of the contact block 73 . The spring facilitates adjustment of the length of the contact block 73 , thereby effectively improving the flexibility of the contact block 73 .

[0041] See also Figure 1 , Figure 3 and Figure 8 The difference between the second embodiment and the first embodiment is that on the basis of retaining the first embodiment, an impeller 310 and an adsorption tube 312 can be provided on the inner wall of the telescopic rod 31 near the water suction port, so as to effectively expand the adsorption space of each part.

[0042] The inner wall of the telescopic rod 31 is movably mounted with an impeller 310, and the outer wall of the telescopic rod 31 is sleeved with an adsorption tube 312. The electromagnetic pump 34 drives the impeller 310 to rotate so that the adsorption tube 312 rotates with the impeller 310, thereby expanding the area of ​​water adsorption and further expanding the range of water quality detection. Secondly, when the water tank body 1 does not need to be cleaned, disinfectant needs to be added regularly. The disinfectant can kill bacteria, viruses and other harmful microorganisms in the water, prevent the growth and reproduction of microorganisms, ensure that the water supply meets the hygiene standards, and ensure the safety of drinking water for residents. Secondly, the electromagnetic pump 34 also It can be a solenoid valve type two-way air intake pump (for example, the solenoid valve type two-way air intake pump of the brand Otus), which is composed of a solenoid valve, a pump body and a connecting pipe 30, etc. The solenoid valve controls the forward and reverse flow channels of the gas respectively. The pump body is a key component for realizing gas compression and transportation. The staff can dissolve an appropriate amount of disinfectant with water and then inject water into the connecting pipe 30 and the telescopic rod 31 in turn through the electromagnetic pump 34, and then the adsorption tube 312 can be driven by the impeller 310 to expand the release range of the disinfectant, thereby improving the practicality of the sampling component 3 and the connecting component 4.

[0043] The present invention is in specific operation: When the water quality in the water tank body 1 needs to be tested, the staff first starts the driving motor and the electromagnetic pump 34 through the control button, so that the electromagnetic pump 34 drives the connecting pipe 30 and the telescopic rod 31 to extract water from the water tank body 1. At the same time, the output end of the driving motor drives the bevel gear set 41 to rotate, so that the first connecting rod 42 drives the other two sets of bevel gear sets 41 to rotate, thereby making the multiple sets of first connecting rods 42 in the water tank body 1 rotate synchronously. The rotation of the first connecting rod 42 makes the positioning ring 33 drive the telescopic rod 31 to move, thereby expanding the sampling range of the telescopic rod 31, thereby realizing multi-point and multi-level sampling of the water quality in the water tank body 1, and improving the uniformity of the sampled water quality. Secondly, an impeller 310 is movably installed at one end of the inner wall of the telescopic rod 31 close to the water suction port, and an adsorption tube 312 is sleeved on the outer wall of the telescopic rod 31. The electromagnetic pump 34 drives the impeller 310 to rotate so that the adsorption tube 312 rotates with the impeller 310, thereby expanding the area of ​​water adsorption, thereby expanding the range of water quality detection. Further, when the sampling assembly 3 completes sampling in the water tank body 1, the material cup 6 at the bottom of the electromagnetic pump 34 collects the water quality. At this time, the electric push rod 50 drives the shift rod 53 to move at the bottom of the limit plate 52, and the push block 55 pushes the limit plate 52, so that the material cup 6 is located at the bottom of the cup cover 8, and another group of material cups 6 is located at the water outlet at the bottom of the electromagnetic pump 34. When the shift rod 53 moves, it drives the rack 56 to rotate the full gear 57. The full gear 57 is provided with a belt 58, and the other end of the belt 58 is installed with a rotating rod 71, which drives the rotating rod 71 to rotate so that the sleeve 72 moves downward, thereby driving the contact block 73 to press down the top of the cup cover 8, so that the cup cover 8 seals the top of the material cup 6, reducing impurities in the air from entering the material cup 6; Furthermore, the cup cover 8 is placed on the inner wall of the discharge bin 70, and a spring and a block are provided at one end of the discharge bin 70 close to the contact block 73 to limit the position of the cup cover 8, thereby facilitating the downward pressing of the contact block 73. Secondly, the shift rod 53 is fixedly connected to the electric push rod 50. When the electric push rod 50 is retracted inward, the shift rod 53 is driven to reset, but the position of the limit plate 52 remains unchanged. The positioning block 54 is movably connected to the shift rod 53, and the positioning block 54 is fixedly connected to the limit plate 52.

[0044] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contributions as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A sampling device for secondary water supply pollution detection, comprising a water tank body (1) and a positioning frame (2), characterized in that: A sampling assembly (3) for extracting water quality in the water tank body (1) is installed at one end of the water tank body (1); the sampling assembly (3) comprises a connecting pipe (30), a telescopic rod (31) and an electromagnetic pump (34); a connecting assembly (4) for extending the telescopic rod (31) is installed at one end of the connecting pipe (30); a first connecting rod (42) is installed at one end of the positioning frame (2); and the telescopic rod (31) is arranged at one end of the first connecting rod (42); a material collection cup (6) is placed at the bottom of the electromagnetic pump (34); and a moving assembly (5) for moving the material collection cup (6) is installed at the bottom of the material collection cup (6); the moving assembly (5) comprises a moving rod (53), a push block (55) and a rack (56); and a pressing assembly (7) is also arranged at one end of the moving assembly (5).

2. A sampling device for secondary water supply pollution detection according to claim 1, characterized in that: A telescopic rod (31) is installed at one end of the connecting pipe (30), and the telescopic rod (31) is located in the water tank body (1). The connecting pipe (30) and the telescopic rod (31) are provided in three groups, and the three groups of connecting pipes (30) and the telescopic rod (31) are evenly distributed from top to bottom in the water tank body (1).

3. A sampling device for secondary water supply pollution detection according to claim 1, characterized in that: A protective frame (40) is provided at one end of the connecting pipe (30), a driving motor is installed on the inner wall of the protective frame (40), and a bevel gear set (41) is installed at the output end of the driving motor; second connecting rods (422) are provided at both ends of the bevel gear set (41), and bevel gear sets (41) are also provided at both ends of the second connecting rod (422); one end of the first connecting rod (42) is connected to the bevel gear set (41) on the outer wall of the water tank body (1).

4. A sampling device for secondary water supply pollution detection according to claim 3, characterized in that: The first connecting rod (42) is a threaded rod, and a positioning ring (33) is sleeved on the outer wall of the first connecting rod (42) in the water tank body (1), and the positioning ring (33) is threadedly connected to the first connecting rod (42), the other end of the positioning ring (33) is sleeved with a telescopic rod (31), and a fixing card (32) is installed at one end of the telescopic rod (31) close to the connecting pipe (30), and one end of the fixing card (32) is connected to the positioning frame (2), and the first connecting rod (42) and the positioning ring (33) are made of stainless steel.

5. A sampling device for secondary water supply pollution detection according to claim 1, characterized in that: A fixing plate (51) and a limiting plate (52) are installed on the outer wall of the water tank body (1), and the fixing plate (51) and the limiting plate (52) are movably connected. A shift rod (53) is installed at the bottom of the limiting plate (52), one end of the shift rod (53) is connected to the output end of the electric push rod (50), and a rack (56) is installed on the outer wall of the shift rod (53), and a full gear (57) is provided on the outer wall of the rack (56), and the full gear (57) and the rack (56) are meshed.

6. A sampling device for secondary water supply pollution detection according to claim 5, characterized in that: A push block (55) is installed at one end of the electric push rod (50), and the push block (55) is in contact with the outer wall of the limit plate (52), and the push block (55) is sleeved on the outer wall of the shift rod (53). A plurality of groups of positioning blocks (54) are fixedly installed at the bottom of the limit plate (52), and the shift rod (53) is movably installed on the inner wall of the positioning block (54).

7. A sampling device for secondary water supply pollution detection according to claim 5, characterized in that: The central shaft sleeve of the full gear (57) is provided with a belt (58), and the other end of the belt (58) is sleeved with a driven wheel (59), a rotating rod (71) is installed on the top of the driven wheel (59), and the outer wall of the rotating rod (71) is sleeved with a sleeve (72).

8. A sampling device for secondary water supply pollution detection according to claim 7, characterized in that: The rotating rod (71) is a screw rod, and the rotating rod (71) is meshed with the inner wall of the sleeve (72). A contact block (73) is provided at one end of the sleeve (72), and a discharge bin (70) is provided at one end of the contact block (73). A plurality of cup covers (8) are movably mounted on the inner wall of the discharge bin (70).

9. A sampling device for secondary water supply pollution detection according to claim 8, characterized in that: A spring is provided at one end of the contact block (73) close to the cup cover (8), and the spring is connected to the bottom of the contact block (73).

10. A sampling device for secondary water supply pollution detection according to claim 8, characterized in that: An impeller (310) may also be provided on one end of the inner wall of the telescopic rod (31) close to the water suction port, and an adsorption tube (312) is sleeved on the outer wall of the telescopic rod (31).

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