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CN-121994549-A - Water pollution detection sampling device for hydraulic engineering

CN121994549ACN 121994549 ACN121994549 ACN 121994549ACN-121994549-A

Abstract

The invention relates to a water pollution detection sampling device for hydraulic engineering, which comprises a ground pile, wherein a sampler is arranged at the output end of the ground pile, a sampling valve and a sampling head are arranged at the outer side of the sampler, a counterweight ring is also arranged at the outer side of the bottom of the sampler, the sampling valve comprises a sampling pipe fixedly arranged at the outer side of the sampler, a plugging ring, a filtering ring and a fixing ring are sequentially arranged inside the sampling pipe from outside to inside, the plugging ring and the fixing ring are fixedly connected at the inner side of the sampling pipe, the filtering ring is slidably connected at the inner side of the sampling pipe, a plurality of filtering membranes are circumferentially arranged at the outer ring of the filtering ring, a plugging cone is rotatably connected at the inner side of the filtering ring, and rotary paddles are arranged at the outer side of the second half section of the plugging cone. The invention prevents the phenomena of water sample backflow and external water body leakage after the sampling is finished, solves the problems of easy blocking lag and sealing failure of the single sealing structure of the existing sampling valve, improves the sealing reliability of the sampling valve, and ensures the stability of the sampling process and the depth representativeness of the collected water sample.

Inventors

  • ZHANG FENG
  • ZHANG XIHUA
  • Bu Naibin
  • WANG GUANGTAO
  • LU DESHENG

Assignees

  • 山东得胜检测技术服务有限公司

Dates

Publication Date
20260508
Application Date
20260401

Claims (9)

  1. 1. The water pollution detection sampling device for the hydraulic engineering comprises a ground pile (1) for the hydraulic engineering, and is characterized in that a sampler (2) is arranged at the output end of the ground pile (1), a sampling valve (4) and a sampling head (5) are arranged at the outer side of the sampler (2), and a counterweight ring (3) is further arranged at the outer side of the bottom of the sampler (2); Sampling valve (4) are including fixed sampling tube (401) that sets up in the sampler (2) outside, the inside of sampling tube (401) has set gradually shutoff ring (402) from outside to inside, filter ring (403) and solid fixed ring (404), and shutoff ring (402) and solid fixed ring (404) fixed connection are in the inboard of sampling tube (401), filter ring (403) sliding connection is in the inboard of sampling tube (401), the outer loop circumference of filtration ring (403) is provided with a plurality of filter membranes, the inboard rotation of filtration ring (403) is connected with shutoff awl (405), the latter half section outside of shutoff awl (405) is provided with rotatory paddle, and the outside shape of shutoff awl (405) and the inboard shape looks adaptation of shutoff ring (402), the rear side fixedly connected with a plurality of movable rods (406) of filtration ring (403), be provided with reset spring (407) between the end of movable rod (406) and solid fixed ring (404).
  2. 2. The device of claim 1, wherein the inner side of the sample injection tube (401) is fixedly connected with a fixed frame (408), the inner end of the fixed frame (408) is fixedly connected with a limiting cylinder (409), the inner side of the limiting cylinder (409) is slidably connected with an inner threaded ring (410), the front end of the plugging cone (405) is fixedly connected with a transmission rod (412), the front end of the transmission rod (412) is in threaded connection with the inner side of the inner threaded ring (410), the outer side of the inner threaded ring (410) is fixedly connected with a plurality of sliding blocks (411) and the sliding blocks (411) are slidably connected with the inner side of the limiting cylinder (409), and the outer side of the inner threaded ring (410) is provided with an expansion ring (413).
  3. 3. The device for detecting and sampling water pollution for hydraulic engineering according to claim 2, wherein a plurality of water inlets are formed in the outer side of the expansion ring (413), and a partition groove (414) which is matched with the shape of the maximum deformation state of the expansion ring (413) is formed in the inner side of the sampling tube (401).
  4. 4. The device for detecting and sampling water pollution for hydraulic engineering according to claim 1, wherein the sampler (2) comprises a trigger piece (21), the trigger piece (21) is arranged at the bottommost end of the sampler (2), three sampling boxes (22) are arranged at the top of the trigger piece (21), sealing heads (23) are arranged at the tops of the sampling boxes (22), driving rods (24) are connected with the centers of the trigger piece (21) and the sampling boxes (22) in a sliding manner, and sealing connecting rings (25) are arranged between the trigger piece (21) and the outer sides of the sampling boxes (22).
  5. 5. The device for detecting and sampling water pollution for hydraulic engineering according to claim 4, wherein the trigger piece (21) comprises a housing (211), a pressure plug (212) is slidably connected in the housing (211), the bottom of the driving rod (24) is fixedly connected to the top of the pressure plug (212), two partition plates (213) are fixedly connected to the inner side of the housing (211), a three-layer spring set (214) is arranged between the housing (211) and the two partition plates (213), and the three spring rigidities of the three-layer spring set (214) are sequentially increased from the bottom to the top.
  6. 6. The hydraulic engineering water pollution detection sampling device according to claim 5, wherein the sampling box (22) comprises a sealing box body (221), a pressing plate (222) is connected between the sealing box body (221) and the driving rod (24) in a sliding mode, a locking groove (223) is formed in the pressing plate (222), a magnetic ball (224) is connected in the pressing plate (222) in a sliding mode, the magnetic ball (224) slides in the locking groove (223), a locking pile (225) is fixedly connected to the inner side of the top of the sealing box body (221), the shape of the locking pile (225) is matched with that of the locking groove (223), and a clamping groove matched with that of the magnetic ball (224) is formed in the outer side of the locking pile (225).
  7. 7. The hydraulic engineering water pollution detection sampling device according to claim 6, wherein the driving rod (24) comprises a smooth rod body (241), a group of attractive force grooves (242) are formed in the outer side of the smooth rod body (241), a group of repulsive force grooves (243) are formed in the outer side of the smooth rod body (241), the attractive force grooves (242) and the repulsive force grooves (243) are formed in positions corresponding to those of the magnetic balls (224), the magnetism of the magnetic balls (224) and the attractive force grooves (242) attract each other, the magnetism of the magnetic balls (224) and the repulsive force grooves (243) repel each other, the magnetism of the magnetic balls (224) and the magnetism of the clamping grooves attract each other, and the magnetism of the clamping grooves is smaller than that of the attractive force grooves (242).
  8. 8. The device of claim 7, wherein the driving rod (24) further comprises a rough surface rod head, the rough surface on the outer side of the rough surface rod head and the rough surface on the inner side of the sealing head (23) form a one-way friction structure, and friction force is increased when the rough surface rod head moves downwards, so that the driving rod (24) is prevented from automatically sliding downwards when the sampler (2) is recovered upwards.
  9. 9. The hydraulic engineering water pollution detection sampling device according to claim 1, wherein the ground pile (1) comprises a mounting table (101), a grounding plate (102) is fixedly connected to the inner side of the mounting table (101), a driving wheel (103) is rotatably connected to the top of the mounting table (101), a traction rope (104) is arranged on the outer side of the driving wheel (103), a connector (105) is fixedly connected to the other end of the traction rope (104), and the connector (105) is fixed to the top of the sampler (2).

Description

Water pollution detection sampling device for hydraulic engineering Technical Field The invention relates to the technical field of water pollution detection and sampling, in particular to a water pollution detection and sampling device for hydraulic engineering. Background In the hydraulic engineering construction operation, water resource protection and water pollution prevention and control work, surface water quality monitoring is a core basic link for carrying out water environment quality evaluation, pollution tracing and investigation, water ecological dispatching and management and environment law enforcement and evidence obtaining, and the water pollution detection sampling device is key special equipment for acquiring representative water samples and guaranteeing real and effective water quality detection data, and is widely applied to fixed-point and layered water quality sampling operation of hydraulic engineering scenes such as rivers, reservoirs, upstream and downstream of water-supply hubs, river-entering sewage outlets and the like, wherein a sampling valve is used as a core component for controlling water inflow on-off and preventing water sample backflow pollution, and the reliability and action linkage of backflow prevention blocking are directly determined. The current hydraulic engineering water pollution detection sampling device adopts negative pressure type sampling structure more, and the sampling valve case is opened through the negative pressure differential drive sampling valve that forms in the sample cavity, accomplishes the collection of target water, relies on single spring reset type seal structure to accomplish the shutoff of inlet channel after the sample is accomplished. But the existing structure only adopts a single-stage sealing structure to realize backflow prevention and plugging, so that the problem of delayed plugging action is solved, the conditions of backflow of collected water samples and leakage of external water bodies are easy to occur, and meanwhile, the single-stage sealing structure is easy to cause sealing failure under complex working conditions such as high sediment, rapid flow and the like of hydraulic engineering, the depth representativeness of the collected water samples and the accuracy of subsequent water quality detection data cannot be ensured, and the high-reliability sampling operation requirement under the complex water body environment of the hydraulic engineering is difficult to meet. Disclosure of Invention The invention aims to provide a water pollution detection sampling device for hydraulic engineering, and aims to solve the problem that the plugging action of a single-stage backflow-prevention plugging structure in the prior art is lagged and the situation that a collected water sample flows back and an external water body leaks easily occurs. The invention aims at realizing the technical scheme that the water pollution detection sampling device for the hydraulic engineering comprises a ground pile, wherein a sampler is arranged at the output end of the ground pile, a sampling valve and a sampling head are arranged at the outer side of the sampler, and a counterweight ring is arranged at the outer side of the bottom of the sampler; The sampling valve is including fixing the sampling tube that sets up in the sampler outside, the inside of sampling tube has set gradually the shutoff ring from outside to interior, filter ring and solid fixed ring, and shutoff ring and solid fixed ring fixed connection are in the inboard of sampling tube, filter ring sliding connection is in the inboard of sampling tube, the outer ring circumference of filter ring is provided with a plurality of filter membranes, the inboard rotation of filter ring is connected with the shutoff awl, the latter half section outside of shutoff awl is provided with rotatory paddle, and the outside shape of shutoff awl and the inboard shape looks adaptation of shutoff ring, the rear side fixedly connected with a plurality of movable levers of filter ring, be provided with reset spring between the terminal of movable lever and the solid fixed ring. As a further description of the above technical solution: The inner side of the sample injection tube is fixedly connected with a fixed frame, the inner end of the fixed frame is fixedly connected with a limiting cylinder, the inner side of the limiting cylinder is slidably connected with an internal thread ring, the front end of the plugging cone is fixedly connected with a transmission rod, the front end of the transmission rod is in threaded connection with the inner side of the internal thread ring, the outer side of the internal thread ring is fixedly connected with a plurality of sliding blocks which are slidably connected with the inner side of the limiting cylinder, and the outer side of the internal thread ring is provided with an expansion ring; As a further description of the above technical solution: the outer side of th