Automatic sampling device for wastewater generated in preparation of 4-chlorobenzophenone

Abstract

The invention discloses a 4-chlorobenzophenone preparation wastewater automatic sampling device, and relates to the technical field of 4-chlorobenzophenone preparation, the 4-chlorobenzophenone preparation wastewater automatic sampling device comprises a sampling assembly, and the sampling assembly comprises a sampling tube. According to the automatic wastewater sampling device for 4-chlorobenzophenone preparation, through a multi-action linkage structure driven by a single stroke of the sampling pipe and a continuous downward stroke of the connecting pipe, four functions of opening a flushing inlet, blocking a reserved sample passage, introducing flushing fluid and recycling the flushing fluid are synchronously realized; an independent structure of a traditional device which needs to control flushing, plugging and recycling step by step is replaced, the operation process is greatly simplified, meanwhile, through the stroke type opening design of a flushing inlet in the side end of the piston ring, the sampling pipe moves downwards to the preset height, so that the flushing inlet is exposed out of an opening in the bottom end of the cylinder body and immersed below the liquid level of a flushing liquid bin; automatic introduction of the flushing fluid is achieved, an additional flushing fluid pump body is not needed, and equipment energy consumption and structural complexity are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of 4-chlorobenzophenone preparation, in particular to a kind of automatic sampling device for 4-chlorobenzophenone preparation wastewater. BACKGROUND

[0002] 4-chlorobenzophenone is widely used in the production process of fine chemical industry such as medicine, dye and pesticide as an important organic synthesis intermediate, its preparation process usually involves Friedel-Crafts acylation reaction of 4-chlorobenzoyl chloride and benzene, and subsequent water washing, alkali washing, purification and other processes, which produces a large amount of industrial wastewater.

[0003] The existing device is usually controlled by electromagnetic valve to realize the opening and closing of pipeline, but the 4-chlorobenzophenone preparation wastewater is strongly corrosive and contains solid residues, which can easily cause the corrosion and jam of electromagnetic valve core, resulting in the failure of sample reservation or pipeline blockage, at the same time, the sample reservation power is usually dependent on pressure or gravity, which not only increases the energy consumption of equipment, but also may cause the change of sample composition due to external disturbance, so it is difficult to ensure the accuracy and stability of sample reservation amount, and it is difficult to adapt to the sample reservation demand of high organic matter concentration wastewater, in addition, the pipeline flushing of existing device needs to be controlled by independent flushing pump, blocking valve and recovery device in steps, which has complex structure and cumbersome operation, high equipment failure rate and high maintenance cost, the flushing liquid is usually introduced by external power source, and there is no linkage design with sampling stroke, which causes the flushing to be not timely and not thorough, and the high concentration organic matter remaining in sampling pipeline can easily cause cross contamination of subsequent samples, affecting the authenticity of test results. SUMMARY

[0004] The present application aims to provide an automatic sampling device for 4-chlorobenzophenone preparation wastewater to solve the problems in the background art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: an automatic sampling device for 4-chlorobenzophenone preparation wastewater, comprising a sampling assembly, the sampling assembly comprises a sampling pipe, a piston ring is integrally fixed at the top end of the sampling pipe, the piston ring side end is in radial communication with the internal cavity of the sampling pipe through a flushing inlet, and a sealing ring is sleeved outside the piston ring, a filter screen is horizontally arranged at the top end of the sampling pipe cavity, and a connecting pipe is connected at the bottom end of the sampling pipe cavity, a flap type one-way valve is arranged at the bottom end of the connecting pipe, and a branch port is in radial communication with the side end of the connecting pipe.

[0006] Further, a flushing assembly is arranged outside the sampling pipe, the flushing assembly comprises a flushing liquid tank arranged outside the sampling pipe, the flushing liquid tank is fixed with external foundation support through supporting legs, the flushing liquid tank is filled with organic solvent flushing liquid, and a liquid supplementing pipe is communicated with the side surface of the flushing liquid tank.

[0007] Further, the flushing assembly further comprises a sleeve fixedly installed at the bottom end of the flushing liquid tank, a heating coil is arranged on the outer edge of the top end of the sleeve cavity, and the top end of the sleeve cavity is in axial sliding fit with the connecting pipe through a sealing bush and is sealed from the organic solution in the flushing liquid tank.

[0008] Further, the flushing assembly further comprises a sample bend in radial communication with the side end of the sleeve cavity, and the sample bend is in communication with a corrosion-resistant sample bottle at the end joint, a hollow structure plug-in switch is fixedly installed at the bottom end of the sleeve cavity, and the bottom end opening of the plug-in switch is in communication with a flushing liquid recovery tank.

[0009] Further, the sample bend is in communication with the branch at the preset height of the sampling pipe, and the plug-in switch opens the clapper type one-way valve at the preset height of the sampling pipe.

[0010] Further, a lifting assembly is installed at the side end of the flushing liquid tank, the lifting assembly comprises a guide rail fixedly installed at the side wall of the flushing liquid tank, a sliding block is slidingly installed on the guide rail, and the end of the sliding block is fixedly connected with the outer wall of the sampling pipe through a connecting ring.

[0011] Further, the lifting assembly further comprises a lead screw threadedly connected to the middle part of the sliding block, the lead screw is drivingly connected to the output end of a gear set, the input end of the gear set is fixedly connected to the rotating end of a motor, and the motor is bolted to the outer edge of the top end of the flushing liquid tank.

[0012] Further, a suction assembly is arranged on the flushing liquid tank, the suction assembly comprises a cylinder body embedded in the top end opening of the flushing liquid tank, the cross section of the cylinder body is in the shape of a "U" with an open bottom end, and the inner diameter of the cylinder body is in close fit with the outer diameter of a piston ring.

[0013] Further, the suction assembly further comprises a plurality of connecting arms fixedly arranged on the outer circle of the bottom end of the cylinder body, one end of the connecting arms away from the cylinder body is fixedly connected with the side wall of the flushing liquid tank, and a liquid level sensor is installed below the connecting arms.

[0014] Further, the suction assembly further comprises an access door rotatably installed at the middle part of the top end of the cylinder body through a hinge, a one-way suction pipe is in communication with one side of the top end of the cylinder body, one end of the one-way suction pipe away from the cylinder body is in communication with a wastewater reservoir, and a pressure relief valve is installed on the other side of the top end of the cylinder body.

[0015] The present application provides a kind of 4-chlorobenzophenone preparation wastewater automatic sampling device, with following beneficial effects: 1. In use, the application adopts mechanical transmission instead of electronic control, integrated design instead of dispersed components, and realizes the innovation of full-process mechanical linkage structure in three stages of sampling, sample reservation and flushing through the core structures of screw gear set transmission, piston ring double sealing and stroke type linkage, and builds a special sampling system fully adapted to the characteristics of 4-chlorobenzophenone preparation wastewater.

[0016] 2. In use, the application realizes the point-to-point precise connection of the branch and the sample reservation elbow pipe through the preset downward stroke of the connecting pipe, replaces the complex structure of the traditional device relying on electromagnetic valve control for sample reservation through mechanical positioning type connection design, ensures the stability and accuracy of the sample reservation amount, and avoids the interference of external driving on the sample composition.

[0017] 3. In use, the application realizes the opening of the flushing inlet, the blocking of the sample reservation passage, the introduction of the flushing liquid and the recovery of the flushing liquid through the continuous downward stroke of the connecting pipe, replaces the independent structure of the traditional device which needs to control flushing, blocking and recovery in steps, greatly simplifies the operation process, and through the stroke type opening design of the piston ring side end flushing inlet, the sampling pipe is lowered to the preset height to make the flushing inlet exposed to the cylinder bottom opening and immersed below the flushing liquid tank liquid level, realizing the automatic introduction of the flushing liquid without additional flushing liquid pump body, reducing the equipment energy consumption and structural complexity. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the device of the application; Figure 2 It is a schematic diagram of the half-section structure of the device of the application; Figure 3 It is a schematic diagram of the full-section structure of the device of the application; Figure 4 It is a schematic diagram of the split structure of the device of the application; Figure 5 It is a schematic diagram of the assembly structure of the flushing assembly and the lifting assembly of the application; Figure 6 It is a schematic diagram of the assembly structure of the sampling assembly and the suction assembly of the application; Figure 7 It is a schematic diagram of the sampling assembly structure of the application; Figure 8 It is a schematic diagram of the process flow of the application.

[0019] In the figure: 1, sampling assembly; 101, sampling tube; 102, piston ring; 103, flushing inlet; 104, sealing ring; 105, filter screen; 106, connecting pipe; 107, valve type one-way valve; 108, branch; 2, flushing assembly; 201, flushing liquid bin; 202, liquid supplementing pipe; 203, sleeve; 204, heating coil; 205, sample retention elbow; 206, plug-in switch; 3, lifting assembly; 301, guide rail; 302, sliding block; 303, connecting ring; 304, screw rod; 305, gear set; 306, motor; 4, suction assembly; 401, cylinder; 402, connecting arm; 403, liquid level sensor; 404, maintenance door; 405, one-way suction pipe; 406, pressure relief valve. DETAILED DESCRIPTION

[0020] The embodiments of the present application will be further described in detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present application, but cannot be used to limit the scope of the present application Please refer to Figures 1 to 8 The present application provides a technical solution: an automatic sampling device for wastewater prepared by 4-chlorobenzophenone, comprising a sampling assembly 1, the sampling assembly 1 comprising a sampling tube 101, the sampling tube 101 having a piston ring 102 integrally fixed at the top end, and the piston ring 102 being in radial communication with the inside cavity of the sampling tube 101 through a flushing inlet 103 at the side end, and the piston ring 102 being externally sleeved with a sealing ring 104, the sampling tube 101 cavity top end being horizontally transversely provided with a filter screen 105, and the sampling tube 101 cavity bottom end being communicated with a connecting pipe 106, the connecting pipe 106 bottom end being provided with a valve type one-way valve 107, and the connecting pipe 106 side end being in radial communication with a branch 108; The specific operation is as follows: in the completion stage of wastewater sampling, accompanied by the continuous downward movement of the sampling tube 101 in the cylinder 401, when the connecting pipe 106 is lowered to a preset height, the branch 108 provided on the side of the connecting pipe 106 is communicated with the sample retention elbow 205 at the corresponding height position of the sleeve 203, at this time the gas pressure in the sampling tube 101 is balanced, the wastewater temporarily stored in the connecting pipe 106 enters the sample retention elbow 205 through the branch 108 and is finally collected into the corrosion-resistant sample retention bottle, through the height precise fitting structure of the branch 108 of the connecting pipe 106 and the sample retention elbow 205, through the preset downward stroke of the connecting pipe 106, the point-to-point precise communication of the branch 108 and the sample retention elbow 205 is realized, through the mechanical positioning type communication design, the complex structure of the traditional device relying on the electromagnetic valve control of sample retention is replaced, both the stability and accuracy of the sample retention amount are ensured, and the interference of external driving on the sample composition is avoided; Please refer to Figures 2 to 5The sampling tube 101 is externally provided with a flushing assembly 2, the flushing assembly 2 comprises a flushing liquid bin 201 arranged outside the sampling tube 101, the flushing liquid bin 201 is fixedly supported by a support foot and an external base, and the flushing liquid bin 201 is filled with an organic solvent flushing liquid inside, and a liquid supplementing pipe 202 is communicated with the side of the flushing liquid bin 201, the flushing assembly 2 further comprises a sleeve 203 fixedly installed at the bottom end of the flushing liquid bin 201, the cavity top end of the sleeve 203 is axially slidably connected with the connecting pipe 106 through a sealing shaft sleeve and is sealed and isolated from the organic solution in the flushing liquid bin 201, and a heating coil 204 is arranged outside the top end of the sleeve 203, the flushing assembly 2 further comprises a sample retaining elbow 205 radially communicated with the side end of the cavity of the sleeve 203, and the end joint of the sample retaining elbow 205 is communicated with a corrosion-resistant sample retaining bottle, a hollow structure plug-in switch 206 is fixedly installed at the bottom end of the cavity of the sleeve 203, and the bottom opening of the plug-in switch 206 is communicated with a flushing liquid recovery tank, the sample retaining elbow 205 is communicated with the branch 108 when the sampling tube 101 is lowered to a preset height, and the plug-in switch 206 opens the clapper type one-way valve 107 when the sampling tube 101 is lowered to a preset height, a lifting assembly 3 is installed at the side end of the cavity of the flushing liquid bin 201, the lifting assembly 3 comprises a guide rail 301 fixedly installed on the side wall of the flushing liquid bin 201, a sliding block 302 is slidably installed on the guide rail 301, and the end portion of the sliding block 302 is fixedly connected with the outer wall of the sampling tube 101 through a connecting ring 303, the lifting assembly 3 further comprises a lead screw 304 screw-connected in the middle portion of the sliding block 302, the lead screw 304 is drivingly connected with the output end of a gear set 305, the input end of the gear set 305 is fixedly connected with the rotating end of a motor 306, and the motor 306 is bolted to the top end of the flushing liquid bin 201; The specific operation is as follows, the motor 306 is started and the screw rod 304 is driven to rotate through the gear set 305, and then the sliding block 302 threaded with the screw rod 304 is lowered on the side wall guide rail 301 of the flushing liquid bin 201, and finally the sampling pipe 101 is driven to move axially downward in the cylinder body 401 through the end connecting ring 303 of the sliding block 302, realizing the stable and controllable axial movement of the sampling pipe 101 in the cylinder body 401. In the pipeline flushing stage, the connection pipe 106 is lowered to the next preset height, the flushing inlet 103 provided on the side end of the piston ring 102 is exposed from the bottom opening of the cylinder body 401, and in the continuous descending stroke of the sampling pipe 101, on the one hand, the flushing inlet 103 is lowered below the liquid level of the flushing liquid bin 201, so that the organic solvent flushing liquid in the flushing liquid bin 201 enters the inside of the sampling pipe 101 through the flushing inlet 103, and on the other hand, the valve type one-way valve 107 at the end of the connection pipe 106 and the plug-in switch 206 at the bottom end of the sleeve 203 are opened at the same time, the plug-in switch 206 opens the valve type one-way valve 107 and makes the flushing liquid in the sampling pipe 101 pass through the hollow cavity of the plug-in switch 206 to the flushing liquid recovery tank, the multi-action linkage structure driven by the single stroke of the sampling pipe 101, through the continuous descending stroke of the connection pipe 106, synchronously realizes the opening of the flushing inlet 103, the blocking of the sampling passage, the introduction of the flushing liquid and the recovery of the flushing liquid, replaces the independent structure of the traditional device which needs to control flushing, blocking and recovery in steps, greatly simplifies the operation process, and through the stroke type opening design of the flushing inlet 103 at the side end of the piston ring 102, the flushing inlet 103 is exposed from the bottom opening of the cylinder body 401 and immersed below the liquid level of the flushing liquid bin 201 through the descending of the sampling pipe 101 to the preset height, realizing the automatic introduction of the flushing liquid, without additional flushing liquid pump body, reducing the equipment energy consumption and structural complexity; Please refer to Figures 6 to 7 , the suction assembly 4 is arranged above the flushing liquid bin 201, the suction assembly 4 comprises a cylinder body 401 embedded in the top opening of the flushing liquid bin 201, the cross section of the cylinder body 401 is a "U" shaped structure with a bottom opening, and the inner diameter of the cylinder body 401 is tightly matched with the outer diameter of the piston ring 102, the suction assembly 4 further comprises a connecting arm 402 fixedly arranged on the bottom end outer circle of the cylinder body 401, the connecting arm 402 is fixedly arranged on the side wall of the flushing liquid bin 201 away from the cylinder body 401, and a liquid level sensor 403 is arranged below the connecting arm 402, the suction assembly 4 further comprises an inspection door 404 rotatably arranged on the top middle part of the cylinder body 401, a one-way suction pipe 405 is communicated with one side of the top of the cylinder body 401, and the one-way suction pipe 405 is communicated with a wastewater reservoir away from the cylinder body 401, and a pressure relief valve 406 is arranged on the other side of the top of the cylinder body 401; The specific operation is as follows: In the initial stage of wastewater sampling, the piston ring 102 at the top of the sampling tube 101 is positioned above the cavity of the cylinder 401. Initially, the flushing inlet 103 on the side of the piston ring 102 is in a closed state, abutting against the inner wall of the cylinder 401. Similarly, the branch port 108 on the side of the connecting pipe 106 at the bottom of the sampling tube 101 is also in a closed state, abutting against the inner wall of the sleeve 203. Through this double sealing structure combined with the tight fit between the outer sealing ring 104 of the piston ring 102 and the inner wall of the cylinder 401, a negative pressure is generated inside the cylinder 401 during the downward movement of the piston ring 102. Industrial wastewater is drawn into the wastewater storage tank through a one-way suction pipe 405 at the top side of the cylinder 401. After entering the cavity of the sampling tube 101, the wastewater is filtered by the filter screen 105 to remove solid residues and is temporarily stored inside the connecting pipe 106. This application adopts the innovative idea of ​​replacing electronic control with mechanical transmission and replacing dispersed components with integrated design. Through the core structure of lead screw 304 gear set 305 transmission, piston ring 102 double sealing, stroke linkage and other core structures, the whole process mechanical linkage structure of sampling, sample retention and rinsing is innovated, and a special sampling system that is fully adapted to the characteristics of 4-chlorobenzophenone preparation wastewater is constructed.

[0021] In summary, when using the automatic wastewater sampling device prepared with 4-chlorobenzophenone: First, in the initial stage of wastewater sampling, the piston ring 102 at the top of the sampling tube 101 is positioned above the cavity of the cylinder 401. The motor 306 is activated, and through the gear set 305, the lead screw 304 is rotated. This, in turn, causes the slider 302, which is threaded onto the lead screw 304, to move downwards along the guide rail 301 on the side wall of the flushing liquid chamber 201. Finally, the connecting ring 303 at the end of the slider 302 drives the sampling tube 101 to move axially downwards within the cylinder 401, achieving smooth and controllable axial movement of the sampling tube 101 within the cylinder 401. In the initial stage, the flushing inlet 103 at the side end of the piston ring 102 is in a closed state, abutting against the inner wall of the cylinder 401. Similarly, the branch port 108 at the side end of the connecting pipe 106 at the bottom of the sampling tube 101 is also in a closed state, abutting against the inner wall of the sleeve 203. Through this double sealing... The sealing structure, combined with the tight fit between the outer sealing ring 104 of the piston ring 102 and the inner wall of the cylinder 401, creates a negative pressure inside the cylinder 401 during the downward movement of the piston ring 102. This pressure is then drawn into the wastewater storage tank through the one-way suction pipe 405 at the top side of the cylinder 401. After entering the cavity of the sampling tube 101, the wastewater is filtered by the filter screen 105 to remove solid residues and is temporarily stored inside the connecting pipe 106. This application adopts the innovative approach of replacing electronic control with mechanical transmission and replacing dispersed components with integrated design. Through the core structures such as the lead screw 304 gear set 305 transmission, double sealing of the piston ring 102, and stroke linkage, it realizes the innovative mechanical linkage structure of the entire process of sampling, sample retention, and rinsing, and constructs a special sampling system that is fully adapted to the characteristics of 4-chlorobenzophenone preparation wastewater. Secondly, at the end of the wastewater sampling stage, as the sampling tube 101 continues to move downward within the cylinder 401, when the connecting tube 106 descends to a preset height, the side port 108 of the connecting tube 106 is connected to the sample retention bend 205 at the corresponding height position on the side of the sleeve 203. At this time, the air pressure inside the sampling tube 101 is balanced, and the wastewater temporarily stored inside the connecting tube 106 enters the sample retention bend 205 through the side port 108 and is finally collected into the corrosion-resistant sample bottle. This application achieves precise point-to-point connection between the side port 108 and the sample retention bend 205 through a height-precision matching structure between the connecting tube 106 side port 108 and the sample retention bend 205 by pre-setting the downward stroke of the connecting tube 106. The mechanical positioning connection design replaces the complex structure of the traditional device that relies on solenoid valves to control the sample retention, which not only ensures the stability and accuracy of the sample quantity, but also avoids the possible interference of external force on the sample composition. Finally, during the pipeline flushing stage, as the wastewater inside the connecting pipe 106 is drained, when the connecting pipe 106 descends to the next preset height, the flushing inlet 103 on the side of the piston ring 102 is exposed from the bottom opening of the cylinder 401. During the continuous descent of the sampling tube 101, on the one hand, the flushing inlet 103 descends below the liquid level of the flushing liquid tank 201, allowing the organic solvent flushing liquid in the flushing liquid tank 201 to enter the sampling tube 101 through the flushing inlet 103. On the other hand, the valve-type check valve 107 at the end of the connecting pipe 106 and the plug-in switch 206 at the bottom of the sleeve 203, while blocking the original passage from the branch port 108 to the sample retention bend 205, open the valve-type check valve 107 through the plug-in switch 206 and allow the sampling tube 101 to enter. The flushing fluid flows through the hollow cavity of the plug-in switch 206 to the flushing fluid recovery tank. This application uses a multi-action linkage structure driven by a single stroke of the sampling tube 101. Through the continuous downward stroke of the connecting tube 106, it simultaneously realizes four functions: opening the flushing inlet 103, sealing the sample retention passage, introducing the flushing fluid, and recovering the flushing fluid. This replaces the independent structure of traditional devices that require step-by-step control of flushing, sealing, and recovery, greatly simplifying the operation process. Furthermore, through the stroke-type opening design of the flushing inlet 103 on the side of the piston ring 102, the sampling tube 101 moves down to a preset height, causing the flushing inlet 103 to be exposed at the bottom opening of the cylinder 401 and immersed below the liquid surface of the flushing fluid tank 201, thus realizing the automatic introduction of the flushing fluid. There is no need to add an additional flushing fluid pump, reducing the energy consumption and structural complexity of the equipment.

[0022] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0023] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, and the existence of an infinite number of specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. An automatic sampling device for wastewater from the preparation of 4-chlorobenzophenone, comprising a sampling component (1), characterized in that, The sampling assembly (1) includes a sampling tube (101), a piston ring (102) is integrally fixed at the top end of the sampling tube (101), and the side end of the piston ring (102) is radially connected to the internal cavity of the sampling tube (101) through a flushing inlet (103). A sealing ring (104) is sleeved on the outside of the piston ring (102). A filter screen (105) is horizontally placed at the top end of the cavity of the sampling tube (101), and a connecting tube (106) is connected to the bottom end of the cavity of the sampling tube (101). A valve-type one-way valve (107) is provided at the bottom end of the connecting tube (106), and a branch port (108) is radially connected to the side end of the connecting tube (106).

2. The automatic sampling device for wastewater preparation of 4-chlorobenzophenone according to claim 1, characterized in that, The sampling tube (101) is provided with a rinsing assembly (2) outside. The rinsing assembly (2) includes a rinsing liquid tank (201) outside the sampling tube (101). The rinsing liquid tank (201) is fixed to the external foundation by a support leg. The rinsing liquid tank (201) is filled with organic solvent rinsing liquid. The side of the rinsing liquid tank (201) is connected to a replenishment pipe (202).

3. The automatic sampling device for wastewater preparation of 4-chlorobenzophenone according to claim 2, characterized in that, The flushing assembly (2) also includes a sleeve (203) fixedly installed at the bottom of the flushing liquid tank (201). The top end of the sleeve (203) cavity is axially slidably fitted with the connecting pipe (106) through a sealing bushing and is sealed and isolated from the organic solution in the flushing liquid tank (201). A heating coil (204) is provided on the outer edge of the top end of the sleeve (203).

4. The automatic sampling device for wastewater preparation of 4-chlorobenzophenone according to claim 3, characterized in that, The flushing assembly (2) also includes a sample retention bend (205) that is radially connected to the side end of the sleeve (203) cavity, and the end connector of the sample retention bend (205) is connected to a corrosion-resistant sample bottle. A hollow plug-in switch (206) is fixedly installed at the bottom end of the sleeve (203) cavity, and the bottom opening of the plug-in switch (206) is connected to the flushing liquid recovery tank.

5. The automatic sampling device for wastewater preparation of 4-chlorobenzophenone according to claim 4, characterized in that, The sample retention bend (205) is connected to the branch port (108) when the sampling tube (101) descends to the preset height, and the plug-in switch (206) opens the valve-type one-way valve (107) when the sampling tube (101) descends to the preset height.

6. The automatic sampling device for wastewater preparation of 4-chlorobenzophenone according to claim 5, characterized in that, The flushing fluid tank (201) is equipped with a lifting assembly (3) on the side of the cavity. The lifting assembly (3) includes a guide rail (301) fixedly installed on the side wall of the flushing fluid tank (201). A slider (302) is slidably installed on the guide rail (301), and the end of the slider (302) is fixedly connected to the outer wall of the sampling tube (101) through a connecting ring (303).

7. The automatic sampling device for wastewater preparation of 4-chlorobenzophenone according to claim 6, characterized in that, The lifting assembly (3) also includes a lead screw (304) threaded to the middle of the slider (302), the lead screw (304) being driven to the output end of the gear set (305), the input end of the gear set (305) being fixedly connected to the rotating end of the motor (306), and the motor (306) being bolted to the outer edge of the top of the flushing liquid tank (201).

8. The automatic sampling device for wastewater preparation of 4-chlorobenzophenone according to claim 7, characterized in that, A suction assembly (4) is provided above the flushing fluid tank (201). The suction assembly (4) includes a cylinder (401) embedded inside the top opening of the flushing fluid tank (201). The cylinder (401) has a "U" shaped cross-section with an opening at the bottom, and the inner diameter of the cylinder (401) is tightly fitted with the outer diameter of the piston ring (102).

9. The automatic sampling device for wastewater preparation of 4-chlorobenzophenone according to claim 8, characterized in that, The suction assembly (4) also includes connecting arms (402) arrayed and fixed to the outer circle of the bottom end of the cylinder (401). The end of the connecting arm (402) facing away from the cylinder (401) is fixed to the side wall of the flushing liquid tank (201), and a liquid level sensor (403) is installed below the connecting arm (402).

10. The automatic sampling device for wastewater preparation of 4-chlorobenzophenone according to claim 9, characterized in that, The suction assembly (4) also includes a maintenance door (404) that is hinged and installed at the top center of the cylinder (401). A one-way suction pipe (405) is connected to one side of the top of the cylinder (401), and the one-way suction pipe (405) is connected to a wastewater storage tank at the end away from the cylinder (401). A pressure relief valve (406) is installed on the other side of the top of the cylinder (401).

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