CN219830412U

CN219830412U - Sampling device for water quality monitoring

Info

Publication number: CN219830412U
Application number: CN202321070060.1U
Authority: CN
Inventors: 徐得智; 郑雁
Original assignee: Shandong Ecological Environment Monitoring Center
Current assignee: Shandong Ecological Environment Monitoring Center
Priority date: 2023-05-07
Filing date: 2023-05-07
Publication date: 2023-10-13
Anticipated expiration: 2033-05-07

Abstract

The utility model discloses a sampling device for water quality monitoring, which comprises a box body, wherein a sampling box, an electric push rod I, a connecting rod, a push plate, a supporting mechanism, a control mechanism, a motor and a storage battery are arranged in the box body; the storage battery is connected with the motor, the control mechanism and the electric push rod I through wires, the electric push rod I, the storage battery, the connecting rod and the push plate are arranged on one side of the inside of the box body, and the supporting mechanism and the sampling box are arranged on the other side of the inside of the box body; the top shaft of the electric push rod I is movably connected with a connecting rod, and one end of the connecting rod is movably connected with a push plate; the control mechanism is arranged at the bottom of the box body. According to the utility model, through arranging a plurality of sampling boxes and the replacement structure of the sampling boxes, the water source sampling at a plurality of depth positions can be completed by one-time submergence of the box body, and meanwhile, the sequential discharge, no disorder and easy resolution of the empty sampling boxes and the sampled sampling boxes can be ensured.

Description

Sampling device for water quality monitoring

Technical Field

The utility model belongs to the technical field of water quality sampling, and particularly relates to a sampling device for water quality monitoring.

Background

Aiming at the monitoring of the water resource environment and the water quality sampling device required by the monitoring, corresponding sampling devices exist in different environments in order to facilitate the rapid and efficient completion of water quality sampling; through retrieval, the water quality sampling device for the environmental pollution source has the application number 202223011795.5, the valve hole on the rotary valve plate is rotated to the position corresponding to the up-down penetration of the water inlet hole to finish water source sampling, and then the rotary valve plate is rotated to the initial position, so that the water inlet hole is plugged through the rotary valve plate, and the defect that water with different depths is easy to mix into the sampling device in the sampling process due to the fact that a sampling port is opened in the sampling process is overcome;

however, the device has a large disadvantage that only one depth position of water source sampling can be achieved through one time of submergence after complex operation, sampling at different depths is required to be carried out through repeated operation and extraction and submergence, and the process is tedious and low in efficiency.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provide a sampling device for water quality monitoring, by arranging a plurality of sampling boxes and the replacement structure of the sampling boxes, the water source sampling at a plurality of depth positions can be completed by one-time submergence of a box body, and meanwhile, the sequential discharge, no disorder and easy resolution of an empty sampling box and the sampled sampling boxes can be ensured.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

a sampling device for water quality monitoring comprises a box body, wherein a sampling box, an electric push rod I, a connecting rod, a push plate, a supporting mechanism, a control mechanism, a motor and a storage battery are arranged in the box body; the storage battery is connected with the motor, the control mechanism and the electric push rod I through wires, the electric push rod I, the storage battery, the connecting rod and the push plate are arranged on one side of the inside of the box body, and the supporting mechanism and the sampling box are arranged on the other side of the inside of the box body; the top shaft of the electric push rod I is movably connected with a connecting rod, and one end of the connecting rod is movably connected with a push plate; the control mechanism is arranged at the bottom of the box body.

The outside of the box body is provided with a sealing cover I and a sealing cover II which correspond to the opening I and the opening II respectively and are used for accommodating a sampling box; check mechanisms are arranged on two sides of the box body; a partition board I and a partition board II are arranged in the box body, and two sides of the partition board I are provided with through cavities for sequential discharge of the sampling boxes; the partition board II is provided with a through groove I and a through groove II; a guide groove I is formed in the inner wall of the box body on one side of the partition board II, and a chute I, a through hole and a guide groove II are formed in the bottom plate of the box body; the inner wall of the box body at the other side of the partition board II is provided with a through groove III, a guide groove III and a through groove X.

The non-return mechanism comprises a wedge block I, a guide column I, a fixed frame I and a spring I; the wedge block I is arranged in the through groove III, the fixed frame I is fixed on the side wall of the box body, one end of the guide post I is fixedly connected with the wedge block I, the other end of the guide post I is slidably connected with the fixed frame I, and the spring I is sleeved with the guide post I; the spring I pushes the wedge block I to slide in the through groove III for resetting.

One end of the push plate is provided with a push rod I, the push rod I corresponds to the through groove II, the other end of the push rod I is provided with a pair of push rods II, one end of the push rod II is provided with a push rod III which is rotationally connected, the end part of the push rod III is provided with a limiting shaft, and the shaft end of the limiting shaft is provided with a roller and is arranged in the guide groove III; the ejector rod II is arranged in the guide groove II; the push plate is arranged in the chute I; one side of the push plate is provided with a pin shaft II which is rotationally connected and is arranged in the guide groove I, and two ends of the pin shaft II are provided with bearings; the length of the ejector rod I is larger than the sum of the thickness of the partition board I and the width of the through cavity; the length of the ejector rod II is 3-4 times that of the ejector rod I, so that when the sampling box reaches the guide groove III, the ejector rod III is pulled to reset through the ejector rod II and is flush with the bottom surface of the box body.

The electric push rod I is fixed on the inner wall of the box body, a pin shaft I is arranged on the top shaft of the electric push rod I and is connected with each other in a rotating mode, and bearings are arranged at two ends of the pin shaft I and are arranged in the guide groove I.

One end of the connecting rod rotates a connecting pin shaft I, and the other end of the connecting rod is provided with a sliding groove II and is movably connected with the pin shaft II through the sliding groove II.

The motor is fixed on the side wall of the partition board II, and the shaft end of the motor is provided with a pressing plate and corresponds to the through groove I; the motor drives the pressing plate to rotate, so that the pressing plate passes through the through groove I and then cuts off the bottommost sampling box and the sampling box above the bottommost sampling box, and is fixed in a pressing mode.

The electric push rod I pushes the pin shaft I to slide downwards along the guide groove I, and then the top end of the connecting rod is driven to descend, so that the pin shaft II is pushed by the connecting rod to slide along the guide groove I towards the direction of the partition board I, the push plate is driven to slide along the chute I, and the push plate drives the ejector rod I and the ejector rod II to be respectively inserted into the through groove II and slide along the guide groove II; further, the ejector rod III is pulled through the ejector rod II, one end of the ejector rod III slides down along the guide groove III and then is flush with the bottom plate of the box body, and the ejector rod I continuously pushes the sampling box to move from the through cavity on one side of the partition board I to the through cavity on the other side and props against the supporting mechanism after penetrating through the through groove II.

The supporting mechanism comprises a supporting plate, a spring III and a guide shaft I; the supporting plate is arranged in the through groove X; one end of the guide shaft I is fixedly connected with the supporting plate, and the other end of the guide shaft I is slidably connected with the side wall of the box body; the spring III is sleeved with the guide shaft I; the spring III pushes the supporting plate to slide in the through groove X for resetting; in the continuous pushing process of the sampling box, the sampling box passes over the wedge-shaped block I in the check mechanism, and then the supporting plate is pushed to retract continuously, so that the sampling box is positioned in the through cavity on one side of the partition board I.

The top of the sampling box is provided with a water outlet, the bottom of the sampling box is provided with a water inlet, and a sealing cover III is arranged at the water inlet for sealing the water inlet; a guide post II is arranged on the sealing cover III, a spring II is sleeved on the guide post II, a fixed plate I is arranged in the sampling box, and the guide post II is connected with the fixed plate I in a sliding manner; the spring II pushes the sealing cover III to slide and reset along the guide post II.

The control mechanism comprises an electric push rod II, a fixed plate II, a spring X, a guide shaft II, a fixed frame II and a mounting box; the installation box is fixed at the bottom of the box body, the electric push rod II is arranged in the installation box and is connected with the storage battery through a circuit, the top shaft of the electric push rod II is slidably connected with the side wall of the installation box and is provided with a sealing gasket, the end part of the top shaft of the electric push rod II is provided with a wedge block II, the fixing plate II is arranged in the middle of the through hole and is fixedly connected with the fixing plate II, the fixing frame II is fixedly connected with the fixing plate II, the guide shaft II is slidably connected with the fixing plate II, one end of the guide shaft II is provided with a limiting plate, the end part of the guide shaft II is in contact with the wedge block II in a propping manner, and the spring X is sleeved with the guide shaft II; the wedge block II is pushed to move through the electric push rod II, the guide shaft II is jacked to penetrate through the through hole and continuously jacked up to cover the cover III, water flows into the sampling box through the water inlet, the electric push rod II is jacked to reset after water taking is completed, the spring X is used for pushing the guide shaft II to reset, and the spring II is used for pushing the cover III to reset to seal the water inlet.

Preferably, a fixed seat is arranged at the top of the box body and used for installing a telescopic shaft or connecting a pull rope; one side of the box body is provided with a balancing weight to make the weight of the box body uniform.

Compared with the prior art, the utility model has the beneficial effects that:

1) When the sampling box needs to be replaced after taking water, the connecting rod is pushed by the electric push rod I, so that the connecting rod pushes the push plate, the push plate pushes the sampling box by the push rod I, and the push rod II pulls the push rod III to reset; it is emphasized that when the ejector rod I does not contact the sampling box, the ejector rod III is pulled to perform reset action so as to ensure that the sampling box enters the through cavity at the other side of the partition board I and reaches the guide groove III, and the ejector rod III is completely reset and is flush with the bottom plate of the box body so as to avoid interference with the movement of the sampling box; continuing to push the sampling box to completely enter the through cavity;

the top shaft of the electric push rod I is reset, the pin shafts I and II connected with the two ends of the connecting rod are pulled to slide in the guide groove I, the push plate is pulled to drive the push rod I and the push rod II to slide and reset, the limiting shaft at one end of the push rod III is pulled to slide along the guide groove III in the reset process of the push rod II and gradually lift the sampling box along the through cavity, the check mechanism prevents the sampling box from sliding backwards, and when the sampling box is lifted to the upper part of the supporting mechanism, the supporting plate pushes ejection through the spring III and provides a supporting effect for the sampling box; the replacement of the sampling box is completed through ejection and resetting of the top shaft of the electric push rod I; the process can quickly realize the replacement of the sampling bottle, so that the full-purpose device can be submerged once to realize the collection of water sources at different depth positions, and the working efficiency is greatly improved;

2) Through the use of baffle I and logical chamber can guarantee that empty sampling box and sampling box after the sampling are discharged in proper order and not disordered, distinguish definitely.

Drawings

FIG. 1 is a schematic diagram of a sampling device for water quality monitoring according to the present utility model;

FIG. 2 is a schematic view of the return-to-suspension mechanism of FIG. 1;

FIG. 3 is a schematic view of the internal structure of the case of FIG. 1;

FIG. 4 is a schematic view of the side wall structure of the case of FIG. 3;

FIG. 5 is a schematic view of a portion of the structure of FIG. 3;

FIG. 6 is a schematic diagram of a replacement process for the sampling cartridge of FIG. 3;

FIG. 7 is a second schematic diagram of the replacement process of the sampling cassette of FIG. 3;

FIG. 8 is a schematic diagram showing the reset effect of the push plate, the ejector rod I and the ejector rod II in FIG. 3;

FIG. 9 is a schematic view of the sampling cartridge of FIG. 3;

FIG. 10 is a schematic view of the internal structure of the sampling cartridge of FIG. 3;

in the figure: 1. a case; 101. a sealing cover I; 1011. an opening I; 102. a sealing cover II; 1021. an opening II; 103. a fixing seat; 104. a non-return mechanism; 1041. wedge block I; 1042. a guide post I; 1043. a fixed frame I; 1044. a spring I; 105. a guide groove I; 106. a through groove I; 107. a through groove II; 108. a chute I; 109. a through hole; 110. a guide groove II; 111. a through groove III; 112. a guide groove III; 113. a through groove X; 114. a partition board I; 115. a cavity is communicated; 116. a partition II; 117. balancing weight; 2. a sampling box; 21. a water outlet; 22. a fixing plate I; 23. a cover III; 231. a guide column II; 24. a spring II; 25. a water inlet; 3. an electric push rod I; 31. a pin I; 311. a bearing; 4. a connecting rod; 41. a chute II; 5. a push plate; 51. a push rod I; 52. a push rod II; 53. ejector rod III; 54. a pin II; 531. a limiting shaft; 6. a support mechanism; 61. a support plate; 62. a spring III; 63. a guide shaft I; 7. a control mechanism; 71. an electric push rod II; 711. wedge block II; 72. a fixing plate II; 73. a spring X; 74. a guide shaft II; 741. a limiting plate; 75. a fixed frame II; 76. a mounting box; 8. a motor; 81. a pressing plate; 9. and a storage battery.

Detailed Description

The technical scheme of the present utility model will be further specifically described below with reference to fig. 1 to 10 for the convenience of understanding of those skilled in the art.

A sampling device for water quality monitoring comprises a box body 1, wherein a sampling box 2, an electric push rod I3, a connecting rod 4, a push plate 5, a supporting mechanism 6, a control mechanism 7, a motor 8 and a storage battery 9 are arranged in the box body 1; the storage battery 9 is connected with the motor 8, the control mechanism 7 and the electric push rod I3 through wires, the electric push rod I3, the storage battery 9, the connecting rod 4 and the push plate 5 are arranged on one side of the inside of the box body 1, and the supporting mechanism 6 and the sampling box 2 are arranged on the other side of the inside of the box body 1; the top shaft of the electric push rod I3 is movably connected with a connecting rod 4, and one end of the connecting rod 4 is movably connected with a push plate 5; the control mechanism 7 is arranged at the bottom of the box body 1.

The outside of the box body 1 is provided with a sealing cover I101 and a sealing cover II 102 which correspond to the opening I1011 and the opening II 1021 respectively and are used for accommodating the sampling box 2; the two sides of the box body 1 are provided with a non-return mechanism 104; the inside of the box body 1 is provided with a baffle I114 and a baffle II 116, and two sides of the baffle I114 are provided with through cavities 115 for sequential discharge of the sampling boxes 2; the baffle II 116 is provided with a through groove I106 and a through groove II 107; a guide groove I105 is formed in the inner wall of the box body 1 at one side of the partition plate II 116, and a sliding groove I108, a through hole 109 and a guide groove II 110 are formed in the bottom plate of the box body 1; the inner wall of the box body 1 at the other side of the partition plate II 116 is provided with a through groove III 111, a guide groove III 112 and a through groove X113.

The check mechanism 104 comprises a wedge block I1041, a guide column I1042, a fixed frame I1043 and a spring I1044; wedge block I1041 is arranged in through groove III 111, fixed frame I1043 is fixed on the side wall of box 1, one end of guide column I1042 is fixedly connected with wedge block I1041, the other end is slidingly connected with fixed frame I1043, and spring I1044 is sleeved with guide column I1042; the spring I1044 pushes the wedge block I1041 to slide in the through groove III 111 for resetting.

One end of the push plate 5 is provided with a push rod I51, the push rod I51 corresponds to the through groove II 107, the other end of the push plate is provided with a push rod II 52, the push rod II 52 is provided with a pair of push rods III 53 which are rotationally connected, one end of the push rod II 52 is provided with a limiting shaft 531, and the shaft end of the limiting shaft 531 is provided with a roller and is arranged in the guide groove III 112; the ejector rod II 52 is arranged in the guide groove II 110; the push plate 5 is arranged in the chute I108; one side of the push plate 5 is provided with a pin II 54 which is rotationally connected and is arranged in the guide groove I105, and two ends of the pin II 54 are provided with bearings; the length of the ejector rod I51 is larger than the sum of the thickness of the partition I114 and the width of the through cavity 115; the length of the ejector rod II 52 is 3-4 times that of the ejector rod I51, so that when the sampling box 2 reaches the guide groove III 112, the ejector rod III 53 is pulled to reset through the ejector rod II 52 and is flush with the bottom surface of the box body 1.

The electric putter I3 is fixed on the inner wall of box 1, is equipped with round pin axle I31 and mutual swivelling joint on the electric putter I3 top axle, and round pin axle I31 both ends are equipped with bearing 311 and locate in the guide way I105.

One end of the connecting rod 4 rotates a connecting pin I31, and the other end of the connecting rod 4 is provided with a sliding groove II 41 and is movably connected with a pin II 54 through the sliding groove II 41.

The motor 8 is fixed on the side wall of the partition plate II 116, and the shaft end of the motor 8 is provided with a pressing plate 81 and corresponds to the through groove I106; the motor 8 drives the pressing plate 81 to rotate, so that the pressing plate 81 passes through the through groove I106 to separate and compress the bottommost sampling box 2 from the sampling box 2 above the bottommost sampling box.

The electric push rod I3 pushes the pin shaft I31 to slide downwards along the guide groove I105, so that the top end of the connecting rod 4 is driven to descend, the connecting rod 4 pushes the pin shaft II 54 to slide along the guide groove I105 towards the direction of the partition board I114, the push plate 5 is driven to slide along the slide groove I108, and the push plate 5 drives the ejector rod I51 and the ejector rod II 52 to be respectively inserted into the through groove II 107 and slide along the guide groove II 110; further, the ejector rod III 53 is pulled by the ejector rod II 52, so that one end of the ejector rod III 53 slides down along the guide groove III 112 and is flush with the bottom plate of the box body 1, and the ejector rod I51 passes through the through groove II 107 and continuously pushes the sampling box 2 to move from the through cavity 115 on one side of the partition board I114 to the through cavity 115 on the other side and contact the supporting mechanism 6.

The supporting mechanism 6 comprises a supporting plate 61, a spring III 62 and a guide shaft I63; the support plate 61 is arranged in the through groove X113; one end of the guide shaft I63 is fixedly connected with the support plate 61, and the other end of the guide shaft I is slidably connected with the side wall of the box body 1; spring III 62 is sleeved with guide shaft I63; the spring III 62 pushes the supporting plate 61 to slide in the through groove X113 for resetting; during the continuous pushing of the sampling box 2, the sampling box 2 passes over the wedge-shaped block I1041 in the check mechanism 104, and then the supporting plate 61 is pushed continuously to retract, so that the sampling box 2 is positioned in the through cavity 115 at one side of the partition board I114.

The top of the sampling box 2 is provided with a water outlet 21, the bottom of the sampling box 2 is provided with a water inlet 25, and a sealing cover III 23 is arranged at the water inlet 25 for sealing the water inlet 25; the cover III 23 is provided with a guide post II 231, the guide post II 231 is sleeved with a spring II 24, a fixed plate I22 is arranged in the sampling box 2, and the guide post II 231 is connected with the fixed plate I22 in a sliding manner; the spring II 24 pushes the cover III 23 to slide along the guide post II 231 for resetting.

The control mechanism 7 comprises an electric push rod II 71, a fixed plate II 72, a spring X73, a guide shaft II 74, a fixed frame II 75 and a mounting box 76; the mounting box 76 is fixed at the bottom of the box body 1, the electric push rod II 71 is arranged in the mounting box 76 and is connected with the storage battery 9 through a circuit, the top shaft of the electric push rod II 71 is slidably connected with the side wall of the mounting box 76 and is provided with a sealing gasket, the top shaft end part of the electric push rod II 71 is provided with a wedge block II 711, the fixing plate II 72 is arranged in the middle of the through hole 109 and is fixedly connected with the fixing plate II 72, the fixing frame II 75 is fixedly connected with the fixing plate II 72, the guide shaft II 74 is slidably connected with the fixing plate II 72, one end of the guide shaft II 74 is provided with a limit plate 741, the end part of the guide shaft II 74 is in contact with the wedge block II 711 in a propping mode, and the spring X73 is sleeved with the guide shaft II 74; the wedge block II 711 is pushed by the electric push rod II 71 to move and lift the guide shaft II 74 to pass through the through hole 109 and continuously lift the sealing cover III 23, so that water flows into the sampling box 2 through the water inlet 25, the electric push rod II 71 is pushed to reset after water taking is completed, the guide shaft II 74 is pushed by the spring X73 to reset, and the sealing cover III 23 is pushed by the spring II 24 to reset to seal the water inlet 25.

A fixed seat 103 is arranged at the top of the box body 1 and used for installing a telescopic shaft or connecting a pull rope; one side of the case 1 is provided with a balancing weight 117 to make the weight of the case 1 uniform.

A sampling device for water quality monitoring, the working process is as follows:

firstly, the opening and closing of the water inlet 25 are controlled by the control mechanism 7 to sample, when the sampling box 2 needs to be replaced after taking water, the connecting rod 4 is pushed by the electric push rod I3, so that the connecting rod 4 pushes the push plate 5, the push plate 5 pushes the sampling box 2 by the push rod I51, and the push rod II 52 pulls the push rod III 53 to reset; it should be emphasized that when the ejector rod i 51 does not contact the sampling box, the ejector rod iii 53 has pulled the ejector rod iii 53 to perform a reset action, so as to ensure that before the sampling box 2 enters the through cavity 115 at the other side of the partition plate i 114 and reaches the guide groove iii 112, the ejector rod iii 53 has been completely reset and is flush with the bottom plate of the box body 1 to avoid interference with the movement of the sampling box 2; continuing to push the cartridge 2 completely into the through cavity 115.

The electric push rod I3 is reset by pushing the shaft, the pin shafts I31 and II 54 connected with the two ends of the connecting rod 4 are pulled to slide in the guide groove I105, the push plate 5 is pulled to drive the push rod I51 and II 52 to slide and reset, the limit shaft 531 at one end of the push rod III 53 is pulled to slide along the guide groove III 112 and gradually lift the sampling box 2 along the through cavity 115 in the reset process of the push rod II 52, the check mechanism 104 prevents the sampling box 2 from sliding backwards, and when the sampling box 2 is lifted to the upper side of the supporting mechanism 6, the supporting plate 61 pushes ejection through the spring III 62 and provides a supporting effect for the sampling box 2; the replacement of the sampling box 2 is completed through ejection and reset of the ejection shaft of the electric push rod I3; the sampling box 2 is sequentially put into the opening I1011, and the sampling box 2 is sequentially taken up by the opening II 1021.

The foregoing is merely illustrative and explanatory of the utility model, as it is well within the scope of the utility model as claimed, as it relates to various modifications, additions and substitutions for those skilled in the art, without departing from the inventive concept and without departing from the scope of the utility model as defined in the accompanying claims.

Claims

1. The sampling device for water quality monitoring comprises a box body and is characterized in that a sampling box, an electric push rod I, a connecting rod, a push plate, a supporting mechanism, a control mechanism, a motor and a storage battery are arranged in the box body; the storage battery is connected with the motor, the control mechanism and the electric push rod I through wires, the electric push rod I, the storage battery, the connecting rod and the push plate are arranged on one side of the inside of the box body, and the supporting mechanism and the sampling box are arranged on the other side of the inside of the box body; the top shaft of the electric push rod I is movably connected with a connecting rod, and one end of the connecting rod is movably connected with a push plate; the control mechanism is arranged at the bottom of the box body;

the outside of the box body is provided with a sealing cover I and a sealing cover II which correspond to the opening I and the opening II respectively and are used for accommodating a sampling box; check mechanisms are arranged on two sides of the box body; a partition board I and a partition board II are arranged in the box body, and two sides of the partition board I are provided with through cavities for sequential discharge of the sampling boxes; the partition board II is provided with a through groove I and a through groove II; a guide groove I is formed in the inner wall of the box body on one side of the partition board II, and a chute I, a through hole and a guide groove II are formed in the bottom plate of the box body; a through groove III, a guide groove III and a through groove X are formed in the inner wall of the box body at the other side of the partition plate II; the non-return mechanism comprises a wedge block I, a guide column I, a fixed frame I and a spring I; the wedge block I is arranged in the through groove III, the fixed frame I is fixed on the side wall of the box body, one end of the guide post I is fixedly connected with the wedge block I, the other end of the guide post I is slidably connected with the fixed frame I, and the spring I is sleeved with the guide post I;

the control mechanism comprises an electric push rod II, a fixed plate II, a spring X, a guide shaft II, a fixed frame II and a mounting box; the installation box is fixed in the bottom half, and electric putter II locates in the installation box and through the line connection battery, and electric putter II apical axis sliding connection installation box lateral wall and be equipped with sealed pad, and electric putter II apical axis tip is equipped with wedge II, fixed plate II locates in the middle of the through-hole and fixed connection, fixed frame II fixed connection fixed plate II, guiding axle II sliding connection fixed plate II, guiding axle II one end is equipped with the limiting plate, and guiding axle II tip apical touch wedge II, spring X cup joints guiding axle II.

2. The sampling device for water quality monitoring according to claim 1, wherein one end of the push plate is provided with a push rod I, the push rod I corresponds to a through groove II, the other end of the push plate is provided with a push rod II, one end of the push rod II is provided with a pair of push rods III which are rotationally connected, the end part of the push rod III is provided with a limiting shaft, and the shaft end of the limiting shaft is provided with a roller and is arranged in the guide groove III; the ejector rod II is arranged in the guide groove II; the push plate is arranged in the chute I; one side of the push plate is provided with a pin shaft II which is rotationally connected and is arranged in the guide groove I, and two ends of the pin shaft II are provided with bearings; the length of the ejector rod I is larger than the sum of the thickness of the partition board I and the width of the through cavity; the length of the ejector rod II is 3-4 times that of the ejector rod I, so that when the sampling box reaches the guide groove III, the ejector rod III is pulled to reset through the ejector rod II and is flush with the bottom surface of the box body.

3. The sampling device for water quality monitoring according to claim 1, wherein the electric push rod I is fixed on the inner wall of the box body, a pin shaft I is arranged on the top shaft of the electric push rod I and is connected with the electric push rod I in a rotating manner, and two ends of the pin shaft I are provided with bearings and are arranged in the guide groove I.

4. The sampling device for water quality monitoring according to claim 1, wherein one end of the connecting rod is rotatably connected with the pin I, and the other end of the connecting rod is provided with the chute II and is movably connected with the pin II through the chute II; the motor is fixed on the side wall of the partition board II, and the shaft end of the motor is provided with a pressing plate and corresponds to the through groove I; the motor drives the pressing plate to rotate, so that the pressing plate passes through the through groove I and then cuts off the bottommost sampling box and the sampling box above the bottommost sampling box, and is fixed in a pressing mode.

5. A sampling device for water quality monitoring according to claim 1, wherein the support mechanism comprises a support plate, a spring iii, a guide shaft i; the supporting plate is arranged in the through groove X; one end of the guide shaft I is fixedly connected with the supporting plate, and the other end of the guide shaft I is slidably connected with the side wall of the box body; the spring III is sleeved with the guide shaft I.

6. The sampling device for water quality monitoring according to claim 1, wherein the top of the sampling box is provided with a water outlet, the bottom of the sampling box is provided with a water inlet, and the water inlet is provided with a sealing cover III; be equipped with guide post II on the closing cap III, cup joint spring II on the guide post II, inside fixed plate I that is equipped with of sampling box, guide post II sliding connection fixed plate I.

7. The sampling device for water quality monitoring according to claim 1, wherein a fixing seat is arranged at the top of the box body; one side of the box body is provided with a balancing weight.