A filtering sampling device for marine environment monitoring

Abstract

The present invention provides a filtering sampling device for marine environment monitoring, which relates to the technical field of marine environment monitoring, including: a sampling sleeve; the sampling sleeve is a rectangular box-shaped structure that penetrates from left to right, the lower end of the sampling sleeve is vertically connected with a collection box, the upper part of the sampling sleeve corresponding to the collection box is vertically connected with a water inlet pipe box, the water inlet pipe box, the sampling sleeve and the inner cavity of the collection box are connected through a connecting structure, a filter box is slidably provided along the inner cavity in the sampling sleeve, the upper end of the filter box is an open end, and the four side walls of the filter box are tangent to the four side walls of the inner cavity of the sampling sleeve. The present invention can realize that the self-unloading door is closed when the filter box is built into the sampling sleeve, and when the filter box pops out, the self-unloading door can be automatically opened, and the floating debris collected inside can automatically slide out, so as to realize the effect of automatic cleaning after the sampling is completed, which is convenient and quick.

Description

Technical Field

[0001] The invention relates to the technical field of marine environment monitoring, and in particular to a filtering sampling device for marine environment monitoring. Background Art

[0002] The main function of marine environment monitoring equipment is to collect a certain amount of seawater samples and conduct subsequent monitoring and analysis to facilitate the understanding of the degree of pollution in the marine environment.

[0003] Usually, in the process of seawater sampling, the device is directly inserted into the water and the seawater is allowed to automatically flow in. Floating debris such as garbage in the seawater will also enter the sampling device. If it is poured out directly, part of the water sample will be lost. If too much is poured out, the water sample will not meet the requirements for detection. If it is taken out manually, the water quality will inevitably be affected in the process of taking out. Summary of the invention

[0004] The invention relates to a filtering sampling device for marine environment monitoring, which can realize that when a filter box is built into a sampling sleeve, a self-unloading door is closed, and when the filter box is ejected, the self-unloading door can be automatically opened, and floating impurities collected inside can automatically slide out, thereby realizing the effect of automatic cleaning after sampling is completed, which is convenient and quick.

[0005] The present invention provides a filtering sampling device for marine environment monitoring, specifically comprising: a sampling sleeve; the sampling sleeve is a rectangular box-shaped structure penetrating from left to right, the lower end of the sampling sleeve is vertically connected to a collecting box, and the upper part of the sampling sleeve is vertically connected to a water inlet pipe box at a position corresponding to the collecting box, and a through-connecting structure is formed between the water inlet pipe box, the sampling sleeve and the inner cavity of the collecting box, a filter box is slidably provided in the sampling sleeve along the inner cavity, the upper end of the filter box is an open end, and the four side walls of the filter box are slidably tangent to the four side walls of the inner cavity of the sampling sleeve; a limiting sleeve is vertically provided on the sampling sleeve on one side of the water inlet pipe box, and two mutually parallel supporting pull rods are vertically provided on the sampling sleeve on the other side of the water inlet pipe box, a lifting handle rod is fixedly connected between the upper ends of the two supporting pull rods, and the end of the lifting handle rod close to the water inlet pipe box extends horizontally to be connected to a rectangular connecting end block, and the upper end of the limiting sleeve is connected to the bottom of the connecting end block.

[0006] Optionally, water-breaking sinkers are fixedly provided on the bottom plane of the sampling kit on both sides of the collecting box, and the water-breaking sinkers are isosceles triangular prism structures that are wide at the upper end and narrow at the lower end, and the lowermost tip of the water-breaking sinker is a lead block structure with rounded corners; a directional fixing plate is provided at a position close to one side of the lifting handle in the inner cavity of the sampling kit, and the upper end of the directional fixing plate is vertically fixedly connected to the top of the inner cavity of the sampling kit, and a gap is left between the lower end of the directional fixing plate and the bottom surface of the inner cavity of the sampling kit.

[0007] Optionally, a liquid level window is vertically embedded in the front end side wall of the collecting box, a sampling tube port is provided in the collecting box below the liquid level window, a water holding chamber is vertically opened in the collecting box and passes through from top to bottom, the upper end of the water holding chamber is connected to the inner cavity of the sampling sleeve box, a drain plug is provided at the lower end of the water holding chamber, the upper end of the drain plug is threadedly connected to the thread of the lower end of the water holding chamber through an internal threaded joint; an inverted cone-shaped water-breaking cone block is provided at the lower end of the drain plug.

[0008] Optionally, the upper end of the water inlet pipe box is provided with a water control pipe block penetrating from top to bottom, and the upper end of the water control pipe block is annularly distributed with a semicircular overflow weir.

[0009] Optionally, a finger groove is provided at the upper end of the connecting end block at a position corresponding to the limiting sleeve, and the front and rear ends of the finger groove are both downwardly beveled structures, and triangular indicating positioning marks are respectively provided on the connecting end block in the middle of the groove walls at the left and right ends of the finger groove.

[0010] Optionally, a fixed sleeve is fixedly provided with a fixed sleeve block in the middle of the limit sleeve, an upper limit rod is vertically slidably inserted in the fixed sleeve block, the upper end of the upper limit rod passes upward through the middle of the finger groove, a limit baffle is fixedly provided at the uppermost end of the upper limit rod, a marking block is fixedly provided at the upper edge of the limit baffle, the lower end of the upper limit rod passes through the fixed sleeve block and is fixedly connected downwardly to a lower limit rod that can slide vertically in the limit sleeve, the lower end of the lower limit rod passes downward through the sampling sleeve box to stop one end of the filter box, a spring is mounted on the upper limit rod between the lower limit rod and the fixed sleeve block, and vertical observation strip holes are annularly distributed on the limit sleeve at the position of the spring. An adjustment limit hole is spirally opened 180 degrees on the limit sleeve, and horizontal bending sections are provided at the upper and lower ends of the adjustment limit hole. A limit stop column is vertically provided on the lower limit rod, and the limit stop column passes through the adjustment limit hole. When the limit stop column is in the adjustment limit hole at the lower end, the lower end of the lower limit rod is in a state of stopping the filter box, and the marking block on the limit stop disk rotates clockwise through the indicating positioning mark on the outside, and when the limit stop column is in the adjustment limit hole at the upper end, the lower end of the lower limit rod will be in the top plate of the sampling box, and the filter box can pass freely, while the marking block on the limit stop disk passes counterclockwise through the indicating positioning mark on the inside.

[0011] The filter element is a filter element having a plurality of filter elements, each of which is a plurality of filter elements having a plurality of filter elements, and a plurality of filter elements having a plurality of filter elements.

[0012] The present invention provides a filtering sampling device for marine environment monitoring, which has the following beneficial effects:

[0013] When the filter cartridge is in the uppermost position, the filter cartridge is in the state of being blocked by the filter cartridge, and the marking block on the limiting baffle plate rotates clockwise to pass through the indicating positioning mark on the outer side, and when the limiting baffle plate is in the uppermost position, the lower end of the limiting rod will be in the top plate of the sampling sleeve box, and the filter cartridge can pass freely, while the marking block on the limiting baffle plate passes through the indicating positioning mark on the inner side counterclockwise. The lower limiting rod in the two states can realize the stopping and blocking of the filter cartridge. When sampling is being carried out, the filter cartridge is in the state of being stuck in the sampling sleeve box, and the sampled water can be filtered and sampled at this time. When the sampling is completed and the filter cartridge is pulled upward from the water, the lower limiting rod can be rotated to be pulled up so that the filter cartridge is unsealed and popped out from the stopping state, and the upper end cavity opening of the water holding chamber of the collecting box is closed by the sealing plate. At this time, the taken water sample will not leak out, thereby ensuring the cleanliness of the taken water sample and the sufficiency of the taken water sample.

[0014] 2. The present invention can realize that the self-unloading door is closed when the filter box is built into the sampling box, and when the filter box is ejected, the self-unloading door can be automatically opened, and the floating debris collected inside can automatically slide out, achieving the effect of automatic cleaning after sampling, which is convenient and quick.

[0015] 3. The present invention can be provided with a water control pipe block penetrating up and down through the upper end of the water inlet pipe box. The upper end of the water control pipe block is annularly distributed with a semicircular overflow weir, which can facilitate the entry of water samples. The water control pipe block and the overflow weir can avoid the generation of tension film at the pipe mouth position, which helps to ensure the normal entry of water. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0017] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0018] In the attached picture:

[0019] Figure 1 A schematic diagram of the first axial view of the present invention is shown;

[0020] Figure 2 The present invention shows Figure 1 A is a schematic diagram of the structure of the enlarged part;

[0021] Figure 3 A second axial structural schematic diagram of the present invention is shown;

[0022] Figure 4 It shows a schematic diagram of the axial structure of the sampling box of the present invention in a state where the front side plate is moved out;

[0023] Figure 5 It shows a schematic diagram of the axial structure of the sampling kit of the present invention in a state where the front end side plate is removed;

[0024] Figure 6 It shows a schematic diagram of the axial structure of the filter box of the present invention in a withdrawn state;

[0025] Figure 7 A partial axial structural schematic diagram of the filter box of the present invention is shown;

[0026] Figure 8 It shows a schematic diagram of the axial structure of the filter box of the present invention in a state where the self-unloading door is slid down;

[0027] Fig. 9 It shows a schematic diagram of the axial structure of the collection box of the present invention in a half-cut classification state;

[0028] Fig.10 It shows a schematic structural diagram of the first axis view of the limiting sleeve of the present invention in a half-cut and separated state of the housing;

[0029] Fig.11 The second axial structural schematic diagram of the limiting sleeve of the present invention in a half-cut and separated state of the shell is shown.

[0030] Reference numerals list

[0031] 1. Sampling box; 101. Water-breaking sinker; 102. Directional fixing plate; 2. Collection box; 201. Liquid level window; 202. Sampling tube port; 203. Vent plug; 20301. Water-breaking cone block; 20302. Internal screw joint; 204. Water chamber; 3. Water inlet box; 301. Water control pipe block; 302. Overflow weir; 4. Lifting handle; 401. Support pull rod; 5. Connecting end block; 501. Finger groove; 502. Positioning mark; 6. Limit sleeve; 601. Upper limit Rod; 602, limit baffle; 603, marking block; 604, fixed sleeve block; 605, spring; 606, adjustment limit hole; 607, lower limit rod; 60701, limit baffle column; 608, observation bar hole; 7, filter box; 701, filter grid column; 702, sealing plate; 70201, limit end block; 703, directional guide rod; 704, spring; 705, dump door; 70501, card edge; 706, end top plate; 70601, end support column; 70602, inner card slot. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment 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.

[0033] Example 1: Please refer to Figures 1 to 11 :

[0034] The present invention proposes a filtering sampling device for marine environment monitoring, comprising: a sampling case 1; the sampling case 1 is a rectangular box-shaped structure that penetrates from left to right, a collecting box 2 is vertically connected to the lower end of the sampling case 1, a water inlet pipe box 3 is vertically connected to the upper part of the sampling case 1 corresponding to the collecting box 2, and a through-connected structure is formed between the water inlet pipe box 3, the sampling case 1 and the inner cavity of the collecting box 2, a filter box 7 is slidably provided in the sampling case 1 along the inner cavity, the upper end of the filter box 7 is an open end, and the four side walls of the filter box 7 are in contact with the four inner cavities of the sampling case 1. The side walls slide tangently; a limiting sleeve 6 is vertically provided on the sampling sleeve box 1 on one side of the water inlet pipe box 3, and two supporting pull rods 401 parallel to each other are vertically provided on the sampling sleeve box 1 on the other side of the water inlet pipe box 3. A lifting handle bar 4 is fixedly connected between the upper ends of the two supporting pull rods 401. Sampling can be carried out into the sea on a small boat through the lifting handle bar 4, which is safe and convenient. One end of the lifting handle bar 4 close to the water inlet pipe box 3 is horizontally extended and connected to a rectangular connecting end block 5, and the upper end of the limiting sleeve 6 is connected to the bottom of the connecting end block 5.

[0035] Among them, water-breaking sinkers 101 are fixedly provided on the bottom plane of the sampling sleeve 1 on both sides of the collecting box 2. The water-breaking sinkers 101 are isosceles triangular prism structures with a wide upper end and a narrow lower end, and the tip of the lowest end of the water-breaking sinker 101 is a lead block structure with rounded corners. The water-breaking sinker 101 can break the water surface when the device enters the water to facilitate the device to enter quickly, destroy the surface tension layer, and reduce the upward push resistance of the device during the sampling process; a directional fixing plate 102 is provided at a position close to one side of the lifting handle 4 in the inner cavity of the sampling sleeve 1, and the upper end of the directional fixing plate 102 is vertically fixedly connected to the top of the inner cavity of the sampling sleeve 1, and a gap is left between the lower end of the directional fixing plate 102 and the bottom surface of the inner cavity of the sampling sleeve 1.

[0036] Among them, a liquid level window 201 is vertically embedded in the front end side wall of the collecting box 2, and the sampled water volume can be observed through the liquid level window 201. A sampling tube port 202 is provided in the collecting box 2 below the liquid level window 201. After the sampling is completed, the required water sample can be released through the sampling tube port 202. A water holding chamber 204 is vertically opened in the collecting box 2 and runs through it from top to bottom. The upper end of the water holding chamber 204 is connected to the inner cavity of the sampling sleeve 1, and the lower end of the water holding chamber 204 is provided with a drain plug 203. The upper end of the drain plug 203 is screwed with the thread of the lower end of the water holding chamber 204 through an internal screw joint 20302, and the remaining water sample can be released and cleaned through the drain plug 203; the lower end of the drain plug 203 is provided with an inverted cone-shaped water-breaking cone block 20301.

[0037] Among them, the upper end of the water inlet pipe box 3 is provided with a water control pipe block 301 which passes through from top to bottom. The upper end of the water control pipe block 301 is annularly distributed with a semicircular overflow weir 302, which can facilitate the entry of water samples. The water control pipe block 301 and the overflow weir 302 can avoid the generation of tension film at the pipe mouth position, which helps to ensure the normal entry of water.

[0038] Among them, a finger groove 501 is provided at the upper end of the connecting end block 5 at the position corresponding to the limiting sleeve 6, and the front and rear ends of the finger groove 501 are both downwardly beveled structures. Triangular indicating positioning marks 502 are respectively provided on the connecting end block 5 in the middle of the groove walls at the left and right ends of the finger groove 501, and the limiting baffle 602 can be lifted and rotated by clamping the finger in the finger groove 501.

[0039] Among them, a fixed sleeve block 604 is fixed in the middle of the limiting sleeve 6, and an upper limit rod 601 is vertically slidably inserted in the fixed sleeve block 604. The upper end of the upper limit rod 601 passes upward through the middle of the finger groove 501, and a limit stopper 602 is fixed at the uppermost end of the upper limit rod 601. A marking block 603 is fixed at the upper edge of the limit stopper 602. The lower end of the upper limit rod 601 passes through the fixed sleeve block 604 and is fixedly connected downward to a lower limit rod 607 that can slide vertically in the limiting sleeve 6. The lower end of the lower limit rod 607 passes downward. The sampling sleeve 1 stops one end of the filter box 7, and a spring 605 is installed on the upper limit rod 601 between the lower limit rod 607 and the fixed sleeve block 604. A vertical observation bar hole 608 is distributed in an annular shape on the limit sleeve 6 where the spring 605 is located. An adjustment limit hole 606 is spirally opened 180 degrees on the limit sleeve 6 below the observation bar hole 608. The upper and lower ends of the adjustment limit hole 606 are provided with horizontal bending sections. A limit stop column 60701 is vertically provided on the lower limit rod 607. The limit stop column 60701 passes through the adjustment limit hole 60 6, when the limit stop post 60701 is in the adjustment limit hole 606 at the lowest end, the lower end of the lower limit rod 607 is in a state of stopping the filter box 7, and the marking block 603 on the limit stop plate 602 rotates clockwise through the indicating positioning mark 502 on the outside, and when the limit stop post 60701 is in the adjustment limit hole 606 at the highest end, the lower end of the lower limit rod 607 will be in the top plate of the sampling box 1, and the filter box 7 can pass freely, and the marking block 603 on the limit stop plate 602 rotates counterclockwise through the indicating positioning mark 502 on the inside. The positioning mark 502 can realize the stop and blockage of the filter box 7 through the lower limit rod 607 in two states. When sampling, the filter box 7 is in a state of being stuck in the sampling sleeve 1. At this time, the sampled water can be filtered and sampled. When the sampling is completed and it is pulled upward from the water, the lower limit rod 607 can be rotated and pulled up to make the filter box 7 unblocked and popped out from the stop state. The upper end cavity of the water holding cavity 204 of the collecting box 2 is closed by the sealing plate 702. At this time, the water sample will not leak out, thereby ensuring the cleanliness of the water sample and the sufficiency of the water sample taken.

[0040] Embodiment 2, based on embodiment 1, as Figure 4-Figure 8As shown, the front, rear and bottom surfaces of the filter box 7 are all provided with filter grid columns 701 with uniform horizontal intervals. The bottom of one end of the filter box 7 close to the directional fixing plate 102 is fixedly connected with a sealing plate 702 extending outward along the bottom surface of the inner cavity of the sampling sleeve 1. The sealing plate 702 slides through the gap between the lower end of the directional fixing plate 102 and the bottom surface of the inner cavity of the sampling sleeve 1. The end of the sealing plate 702 is vertically provided with a limiting end block 70201. A directional guide rod 703 is vertically provided in the middle of the filter box 7 at the end where the sealing plate 702 is located. One end of the directional guide rod 703 vertically passes through the directional fixing plate 102. A spring 704 is mounted on the directional guide rod 703 between the directional fixing plate 102 and the filter box 7. The other end of the filter box 7 is vertically slidably plugged in There is a self-unloading door 705, and the left and right sides of the upper end of the self-unloading door 705 are respectively provided with protruding card edges 70501, and the tops of the left and right ends of the filter box 7 are respectively fixed with end top plates 706, and the end of the end top plate 706 opposite to the self-unloading door 705 is provided with an inner card groove 70602 that can be connected with the card edge 70501, and the two corners on the inner side of the end top plate 706 are respectively fixed vertically downward with end support columns 70601, and the lower ends of the end support columns 70601 are fixedly connected to the bottom plate of the filter box 7, so that the self-unloading door 705 can be closed when the filter box 7 is built into the sampling kit 1, and when the filter box 7 is ejected, the self-unloading door 705 can be automatically opened, and the floating debris collected inside can automatically slide out, so as to achieve the effect of automatic cleaning after the sampling is completed, which is convenient and quick.

[0041] The working principle of this embodiment is as follows: during use, the lifting handle 4 can be held by hand to allow the device to enter the seawater for sampling. At first, the directional fixing plate 102 is passed through, and a spring 704 is mounted on the directional guide rod 703 between the directional fixing plate 102 and the filter box 7. When the limit stop column 60701 is in the adjustment limit hole 606 at the lower end, the lower end of the lower limit rod 607 is in a state of stopping the filter box 7, and the marking block 603 on the limit stop plate 602 rotates clockwise through the indicating positioning mark 502 on the outside, and when the limit stop column 60701 is in the adjustment limit hole 606 at the upper end, the lower end of the lower limit rod 607 will be in a state of stopping the filter box 7. In the top plate of the sampling sleeve 1, the filter box 7 can pass freely, and the marking block 603 on the limit baffle 602 passes the indicating positioning mark 502 on the inside counterclockwise, and the filter box 7 can be stopped and blocked by the lower limit rod 607 in two states. When sampling, the filter box 7 is in a state of being stuck in the sampling sleeve 1. At this time, the sampled water can be filtered and sampled. When the sampling is completed and it is pulled upward from the water, the lower limit rod 607 can be rotated and pulled up to make the filter box 7 unblocked and popped out from the stop state, and the upper cavity opening of the water holding chamber 204 of the collecting box 2 is closed by the sealing plate 702. At this time, the collected water sample will not leak out, and the sampling is completed.

[0042] In this article, there are a few points to note:

[0043] 1. The drawings of the embodiments of the present disclosure only involve structures related to the embodiments of the present disclosure, and other structures may refer to general designs.

[0044] 2. In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0045] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A filtering sampling device for marine environment monitoring, comprising: The sampling sleeve (1) is a rectangular box-shaped structure that penetrates from left to right, characterized in that the lower end of the sampling sleeve (1) is vertically connected to a collecting box (2), and the upper part of the sampling sleeve (1) is vertically connected to a water inlet pipe box (3) at a position corresponding to the collecting box (2). The inner cavities of the water inlet pipe box (3), the sampling sleeve (1) and the collecting box (2) are connected through a through structure. A filter box (7) is slidably provided along the inner cavity of the sampling sleeve (1), and the upper end of the filter box (7) is an open end. The four side walls of the filter box (7) are slidably tangent to the four side walls of the inner cavity of the sampling sleeve (1); the water inlet pipe box (3) A limiting sleeve (6) is vertically provided on the sampling sleeve (1) on one side, and two mutually parallel supporting rods (401) are vertically provided on the sampling sleeve (1) on the other side of the water inlet pipe box (3). A hanging handle rod (4) is fixedly connected between the upper ends of the two supporting rods (401). One end of the hanging handle rod (4) close to the water inlet pipe box (3) extends horizontally and is connected to a rectangular connecting end block (5). The upper end of the limiting sleeve (6) is connected to the bottom of the connecting end block (5). Water-breaking sinkers (101) are fixedly provided on the bottom planes of the sampling sleeves (1) on both sides of the collecting box (2). The block (101) is an isosceles triangular prism structure with a wide upper end and a narrow lower end, and the tip of the lower end of the water-breaking sinker (101) is a lead block structure with rounded corners; a directional fixing plate (102) is provided at a position in the inner cavity of the sampling sleeve (1) close to one side of the lifting handle (4), the upper end of the directional fixing plate (102) is vertically fixedly connected to the top of the inner cavity of the sampling sleeve (1), and a gap is left between the lower end of the directional fixing plate (102) and the bottom surface of the inner cavity of the sampling sleeve (1); a finger groove (501) is provided at the upper end of the position corresponding to the limiting sleeve (6), and the finger groove (501) ) has a downwardly beveled structure at both front and rear ends, and triangular indicating positioning marks (502) are respectively provided on the connecting end blocks (5) in the middle of the groove walls at the left and right ends of the finger groove (501); a fixed sleeve block (604) is fixedly provided in the middle of the limiting sleeve (6), and an upper limit rod (601) is vertically slidably inserted in the fixed sleeve block (604), and the upper end of the upper limit rod (601) passes upward through the middle of the finger groove (501), and a limiting stopper (602) is fixedly provided at the uppermost end of the upper limit rod (601), and a marking block (603) is fixedly provided at the upper edge of the limiting stopper (602);The lower end of the upper limit rod (601) passes through the fixed sleeve (604) and is fixedly connected downward to a lower limit rod (607) that can slide vertically in the limit sleeve (6). The lower end of the lower limit rod (607) passes downward through the sampling sleeve (1) to stop one end of the filter box (7). A spring (605) is sleeved on the upper limit rod (601) between the lower limit rod (607) and the fixed sleeve (604). Vertical observation holes (608) are distributed in an annular shape on the limit sleeve (6) at the position of the spring (605). An adjustment limit hole (606) is spirally opened 180 degrees on the limit sleeve (6) below the observation hole (608). Horizontal bending sections are provided at the upper and lower ends of the adjustment limit hole (606). A limit stop post (60701) is vertically arranged on the rod (607), and the limit stop post (60701) passes through the adjustment limit hole (606). When the limit stop post (60701) is in the adjustment limit hole (606) at the lower end, the lower end of the lower limit rod (607) is in a state of stopping the filter box (7), and the marking block (603) on the limit stop plate (602) rotates clockwise to pass through the indicating positioning mark (502) on the outside. When the limit stop post (60701) is in the adjustment limit hole (606) at the upper end, the lower end of the lower limit rod (607) will be in the top plate of the sampling box (1), and the filter box (7) can pass freely, while the marking block (603) on the limit stop plate (602) rotates counterclockwise. The filter box (7) is provided with uniformly spaced filter grid columns (701) at the front, rear and bottom surfaces thereof, and a sealing plate (702) extending outward is fixedly connected to the bottom of the inner cavity of the sampling casing (1) at one end of the filter box (7) close to the directional fixing plate (102). The sealing plate (702) slides through the gap between the lower end of the directional fixing plate (102) and the bottom surface of the inner cavity of the sampling casing (1). A limiting end block (70201) is vertically provided at the end of the sealing plate (702). A directional guide rod (703) is vertically provided in the middle of the filter box (7) at the end where the sealing plate (702) is located. One end of the directional guide rod (703) passes vertically through the directional fixing plate (102). A spring (704) is mounted on the directional guide rod (703) between the directional fixing plate (102) and the filter box (7). A self-unloading door (705) is vertically slidably inserted at the other end of the filter box (7). The upper and left sides of the self-unloading door (705) are respectively provided with outwardly protruding clamping edges (70501). The tops of the left and right ends of the filter box (7) are respectively fixed with end top plates (706). The end of the end top plate (706) opposite to the self-unloading door (705) is provided with an inner clamping groove (70602) that can be clamped with the clamping edge (70501). The two corners on the inner side of the end top plate (706) are respectively fixed with end support columns (70601) vertically downward. The lower end of the end support column (70601) is fixedly connected to the bottom plate of the filter box (7). ; 2. A filtering sampling device for marine environment monitoring according to claim 1, characterized in that: A liquid level window (201) is vertically embedded in the front end side wall of the collecting box (2), a sampling tube opening (202) is provided in the collecting box (2) below the liquid level window (201), a water storage chamber (204) is vertically opened in the collecting box (2) and penetrates from top to bottom, the upper end of the water storage chamber (204) is connected to the inner chamber of the sampling sleeve box (1), a drain plug (203) is provided at the lower end of the water storage chamber (204), the upper end of the drain plug (203) is screwed to the thread of the lower end of the water storage chamber (204) through an internal screw joint (20302); and an inverted cone-shaped water-breaking cone block (20301) is provided at the lower end of the drain plug (203).

3. A filtering sampling device for marine environment monitoring according to claim 1, characterized in that: The upper end of the water inlet pipe box (3) is provided with a water control pipe block (301) penetrating from top to bottom, and the upper end of the water control pipe block (301) is annularly provided with a semicircular overflow weir (302).

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