A chemical sludge content detection device

Abstract

The invention discloses a chemical sludge content detection device, which is characterized in that it comprises a sampling mechanism and a gas collecting mechanism; the sampling mechanism comprises a sampling body, a sampling cavity is provided at the lower end of the sampling body, a containing cavity is provided at the upper end of the sampling body, a sampling port connected with the sampling cavity is provided at the bottom of the sampling body, a valve plate for controlling the opening and closing of the sampling port is rotatably provided in the sampling cavity, a sampling piston is movably provided in the sampling cavity, the upper end of the sampling piston movably penetrates into the containing cavity and is connected with a first spring between the bottom wall of the containing cavity, and the sampling piston is transmission-connected with the valve plate to drive the valve plate to rotate; the gas collecting mechanism is slidably arranged in the containing cavity and can be detachably connected with the sampling piston, the gas collecting mechanism is provided with a gas collecting cavity and a gas collecting hose, and the two ends of the gas collecting hose are respectively connected with the gas collecting cavity and the sampling cavity; thereby, the chemical sludge after sampling is prevented from contacting with the outside world, the sample preservation adjustment is optimized, and the VOC gas is prevented from volatilizing and escaping, which is beneficial to improving the accuracy and reliability of the detection result.

Description

Technical Field

[0001] The invention relates to the technical field of sampling and detection, in particular to a chemical sludge content detection device. Background Art

[0002] In the field of environmental protection and pollution control, the volatile organic compound (VOC) content in chemical sludge is an important detection indicator. Accurately measuring the VOC content in chemical sludge is crucial for evaluating its environmental hazards and formulating corresponding treatment measures.

[0003] However, existing detection methods usually use manual sampling and then transfer to external storage. During the sampling process of this detection method, the sample is in contact with the outside world for a long time, which can easily cause some VOCs to volatilize, thereby affecting the accuracy and reliability of the test results. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned shortcomings and provide a chemical sludge content detection device, thereby avoiding the contact of chemical sludge after sampling with the outside world, optimizing sample preservation and adjustment, and preventing VOC gas from volatilizing and escaping, thereby facilitating improving the accuracy and reliability of the detection results.

[0005] To achieve the above-mentioned purpose, the specific scheme of the present invention is as follows: A chemical sludge content detection device includes a sampling mechanism and a gas collection mechanism;

[0006] The sampling mechanism comprises a sampling body, a sampling cavity is provided at the lower end of the sampling body, a receiving cavity is provided at the upper end of the sampling body, a sampling port connected with the sampling cavity is provided at the bottom of the sampling body, a valve plate for controlling the opening and closing of the sampling port is rotatably provided in the sampling cavity, a sampling piston is movably provided in the sampling cavity, the upper end of the sampling piston movably penetrates into the receiving cavity and is connected with a first spring between the bottom wall of the receiving cavity, and the sampling piston is transmission-connected with the valve plate to drive the valve plate to rotate;

[0007] The gas collecting mechanism is slidably arranged in the accommodating cavity and can be detachably connected with the sampling piston. The gas collecting mechanism is provided with a gas collecting cavity and a gas collecting hose. The two ends of the gas collecting hose are respectively connected with the gas collecting cavity and the sampling cavity.

[0008] Optionally, the valve plate has a central axis; the sampling piston comprises a first piston, a first plug rod, and a first axial hole provided on the first piston and the first plug rod;

[0009] The central shaft is movably inserted into the first shaft hole, and a driving groove is provided on the outer wall of the central shaft. The driving groove includes a vertical section, a first spiral section connected to the upper end of the vertical section, and a second spiral section connected to the lower end of the vertical section; a driving pin is provided on the inner wall of the first shaft hole, and the driving pin is movably embedded in the driving groove.

[0010] Optionally, a heating plate is provided on the inner wall of the sampling cavity.

[0011] Optionally, a plurality of sampling ports are evenly distributed along the circumferential direction at the bottom of the sampling body, and the valve plate includes a plurality of valve sheets distributed along the circumferential direction; the valve sheets correspond to the sampling ports one by one, and the valve sheets are in contact with the bottom wall of the sampling cavity.

[0012] Optionally, a limit arc groove is provided on the bottom wall of the sampling cavity, wherein one of the valve plates is connected to a limit pin, and the limit pin is movably embedded in the limit arc groove.

[0013] Optionally, locking grooves are provided at both ends of the limit arc groove, the limit pin is slidably inserted on the valve plate and a limit spring is connected between the valve plate; the limit spring keeps the limit pin abutting against the limit arc groove;

[0014] When the limit pin cooperates with the locking groove under the elastic force of the limit spring, the limit pin can unlock and lock the valve plate.

[0015] Optionally, the gas collecting mechanism comprises a gas collecting body that can slide into the accommodating cavity, the gas collecting body is rotatably engaged with the top end of the first plug rod, the gas collecting body is provided with a gas collecting cavity, a gas collecting piston is movably provided in the gas collecting cavity, and a second spring is connected between the gas collecting piston and the gas collecting body;

[0016] A stirring rod is passed through the first piston, and a screw is connected to the top of the first plug rod. The screw is rotatably passed through the gas collecting body and is threadedly connected to the gas collecting piston; an annular groove connected to the first spiral is provided on the central axis above the driving groove.

[0017] Optionally, there are multiple stirring rods, and the multiple stirring rods are distributed on the first piston along the circumferential direction.

[0018] Optionally, a condenser is provided on the outer wall of the gas collecting body, and the condenser has a condensation chamber; the upper end of the gas collecting hose is spirally coiled in the condensation chamber, and the upper end of the gas collecting hose passes through the condenser and the gas collecting body and is connected to the gas collecting chamber. The gas collecting chamber is provided with an opening valve at the connection between the gas collecting hose and the gas collecting body to control the connection between the gas collecting hose and the gas collecting chamber.

[0019] Optionally, an avoidance hole is provided through the upper end of the sampling body, and the avoidance hole extends along the height direction of the gas collecting body; when the gas collecting mechanism slides downward into the accommodating cavity, the gas collecting hose is movably inserted into the avoidance hole.

[0020] The beneficial effects of the present invention are as follows: the present invention seals the chemical sludge after sampling in the sampling chamber, and uses a gas collecting hose to guide the VOC gas volatilized in the sampling chamber to the gas collecting chamber for storage, thereby avoiding the contact of the chemical sludge after sampling with the outside world, optimizing the sample preservation adjustment, and preventing the volatilization and escape of VOC gas, thereby facilitating improving the accuracy and reliability of the detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 It is a structural schematic diagram of another perspective of the present invention;

[0023] Figure 3 It is a cross-sectional schematic diagram of the present invention;

[0024] Figure 4 It is a structural schematic diagram of the sampling mechanism of the present invention;

[0025] Figure 5 It is a cross-sectional schematic diagram of the sampling mechanism of the present invention;

[0026] Figure 6 It is a schematic diagram of the structure of the sample object of the present invention;

[0027] Figure 7 It is a structural schematic diagram of the valve plate of the present invention;

[0028] Figure 8 is a cross-sectional schematic diagram of the sampling piston of the present invention;

[0029] Fig. 9 is a cross-sectional schematic diagram of the gas collecting mechanism of the present invention;

[0030] Explanation of reference numerals: 11, sampling body; 111, sampling cavity; 112, accommodating cavity; 113, sampling port; 114, limiting arc groove; 115, locking groove; 116, avoidance hole; 12, valve plate; 121, valve plate; 122, central axis; 123, vertical section; 124, first spiral section; 125, second spiral section; 126, limiting pin; 127, annular groove; 13, sampling piston; 131, first Piston; 132, first plug rod; 133, first axial hole; 134, drive pin; 14, first spring; 15, heating plate; 16, stirring rod; 17, screw; 21, gas collecting body; 22, gas collecting piston; 221, second piston; 222, second plug rod; 223, second axial hole; 23, second spring; 24, gas collecting hose; 25, gas collecting chamber; 26, opening valve; 3, condenser; 31, condensation chamber. DETAILED DESCRIPTION

[0031] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, but the implementation scope of the present invention is not limited thereto.

[0032] like Figures 1 to 9 As shown, a chemical sludge content detection device described in this embodiment includes a sampling mechanism and a gas collecting mechanism; the sampling mechanism includes a cylindrical sampling body 11, a sampling cavity 111 is provided at the lower end of the sampling body 11, a receiving cavity 112 is provided at the upper end of the sampling body 11, the upper end of the receiving cavity 112 is open, a sampling port 113 connected to the sampling cavity 111 is provided at the bottom of the sampling body 11, a valve plate 12 for controlling the opening and closing of the sampling port 113 is rotatably provided in the sampling cavity 111, and the sampling A sampling piston 13 is movably provided in the cavity 111, and the upper end of the sampling piston 13 is movably inserted into the accommodating cavity 112 and is connected to the bottom wall of the accommodating cavity 112 by a first spring 14, and the sampling piston 13 is drivingly connected to the valve plate 12 to drive the valve plate 12 to rotate; an air collecting mechanism is slidably provided in the accommodating cavity 112 and can be detachably connected to the sampling piston 13, and the air collecting mechanism is provided with an air collecting cavity 25 and an air collecting hose 24, and the two ends of the air collecting hose 24 are respectively connected to the air collecting cavity 25 and the sampling cavity 111.

[0033] When the chemical sludge content detection device of this embodiment is actually used, the gas collecting mechanism is disassembled and connected to the upper end of the sampling piston 13. In the natural state, the sampling piston 13 is in an extended state under the elastic force of the first spring 14, and the valve plate 12 closes the sampling port 113. When sampling is required, the gas collecting mechanism is pressed to apply downward pressure to the sampling piston 13, so that the sampling piston 13 overcomes the elastic force of the first spring 14 and moves downward. When the sampling piston 13 is pressed downward, the sampling piston 13 causes the valve plate 12 to open the sampling port 113 until the sampling piston 13 moves down to the bottom dead center position, and the sampling is performed. The piston 13 discharges the air in the sampling chamber 111 and causes the valve plate 12 to close the sampling port 113; after the sampling port 113 is placed in the sampling position, the air collecting mechanism is stopped from being pressed, and the sampling piston 13 is reset under the elastic force of the first spring 14 at this time, and the sampling piston 13 causes the valve plate 12 to open the sampling port 113. As the sampling piston 13 moves upward, the effective volume of the sampling chamber 111 gradually increases, and the chemical sludge at the sampling position is sucked into the sampling chamber 111, until the sampling piston 13 moves upward to the top dead center position, and the valve plate 12 closes the sampling port 113, completing the sample sampling process;

[0034] After the sample is taken, the VOC gas in the chemical sludge in the sampling chamber 111 is volatilized, and the volatilized VOC gas enters the gas collecting chamber 25 through the gas collecting hose 24 for storage, thereby fully collecting the VOC gas in the sampled chemical sludge, thus preventing the sampled chemical sludge from contacting the outside world.

[0035] In this embodiment, the chemical sludge after sampling is sealed in the sampling chamber 111, and the VOC gas volatilized in the sampling chamber 111 is guided to the gas collecting chamber 25 for storage by the gas collecting hose 24, thereby avoiding the contact of the chemical sludge after sampling with the outside world, optimizing the sample preservation adjustment, and preventing the volatilization and escape of VOC gas, thereby helping to improve the accuracy and reliability of the detection results.

[0036] like Figure 3 , Figure 5 , Figure 7 and Figure 8 As shown, a chemical sludge content detection device described in this embodiment, in some embodiments, the valve plate 12 has a central axis 122; the sampling piston 13 includes a first piston 131, a first plug rod 132 and a first axial hole 133 provided on the first piston 131 and the first plug rod 132; the central axis 122 movably penetrates into the first axial hole 133, and the outer wall of the central axis 122 is provided with a driving groove, and the driving groove includes a vertical section 123, a first spiral section 124 connected to the upper end of the vertical section 123 and a second spiral section 125 connected to the lower end of the vertical section 123; the inner wall of the first axial hole 133 is provided with a driving pin 134, and the driving pin 134 is movably embedded in the driving groove.

[0037] Specifically, initially, the sampling piston 13 is located at the top dead center position. As the sampling piston 13 moves downward, the driving pin 134 enters the first spiral section 124. At this time, under the cooperation of the driving pin 134 and the first spiral section 124, the sampling piston 13 drives the central shaft 122 to drive the valve plate 12 to rotate, thereby opening the sampling port 113, until the driving pin 134 enters the vertical section 123 from the first spiral section 124. At this time, the sampling port 113 remains in an open state, and the first piston 131 discharges the air in the sampling chamber 111 through the sampling port 113, until the driving pin 134 enters the second spiral section 125 from the vertical section 123. At this time, under the cooperation of the driving pin 134 and the second spiral section 125, the sampling piston 13 causes the central shaft 122 to drive the valve plate 12 to rotate, thereby closing the sampling port 113, until the sampling piston 13 moves downward to the bottom dead center position;

[0038] Then, the sampling piston 13 moves upward under the elastic force of the first spring 14, and the driving pin 134 moves along the trajectory of the second spiral section 125, so that the central axis 122 drives the valve plate 12 to rotate, and the sampling port 113 is opened until the driving pin 134 enters the vertical section 123. As the first piston 131 moves upward, the effective volume of the sampling chamber 111 gradually increases, so that the chemical sludge at the sampling position is sucked into the sampling chamber 111. As the driving pin 134 enters the first spiral section 124, the valve plate 12 closes the sampling port 113 until the first piston 131 moves to the top dead center position, thereby completing the sample sampling process. At this time, the sampled chemical sludge is stored in the closed sampling chamber 111, thereby avoiding the sampled chemical sludge from contacting the outside world, thereby effectively preventing the VOC gas from volatilizing and escaping.

[0039] like Figure 3 and Figure 5 As shown, in the chemical sludge content detection device described in this embodiment, in some embodiments, a heating plate 15 is installed on the inner wall of the sampling cavity 111. In this embodiment, the heating plate 15 is provided, so that the chemical sludge in the sampling cavity 111 is heated by the heating plate 15, so that the VOC gas in the sample can be fully volatilized, further improving the accuracy and reliability of the detection result.

[0040] Optimally, two heating plates 15 are disposed opposite to each other on the inner wall of the sampling chamber 111 , so that the sample in the sampling chamber 111 can be fully heated and the VOC gas can be volatilized more fully.

[0041] like Figure 2 and Figure 7 As shown, in some embodiments of a chemical sludge content detection device described in this embodiment, a plurality of sampling ports 113 are evenly distributed along the circumferential direction at the bottom of the sampling body 11, and the valve plate 12 includes a plurality of valve plates 121 distributed along the circumferential direction; the valve plates 121 correspond to the sampling ports 113 one by one, and the valve plates 121 are in contact with the bottom wall of the sampling cavity 111. In this embodiment, a plurality of sampling ports 113 and a plurality of valve plates 121 are provided to correspond to each other so that sampling can be completed quickly during sampling, that is, during sampling, the chemical sludge at the sampling position can enter the sampling cavity 111 through each sampling port 113. The number of sampling ports 113 and valve plates 121 can be freely set according to actual design needs.

[0042] like Figure 6 and Figure 7As shown, in the chemical sludge content detection device described in this embodiment, in some embodiments, the bottom wall of the sampling cavity 111 is provided with a limit arc groove 114, one of the valve plates 121 is connected to a limit pin 126, and the limit pin 126 is movably embedded in the limit arc groove 114. In this embodiment, the limit arc groove 114 and the limit pin 126 are provided to cooperate, thereby limiting the rotation angle of the valve plate 12, and the structure is more reliable.

[0043] like Figure 6 As shown, a chemical sludge content detection device described in this embodiment, in some embodiments, both ends of the limit arc groove 114 are provided with locking grooves 115, the limit pin 126 is slidably inserted on the valve plate 121 and a limit spring is connected between the valve plate 121; the limit spring keeps the limit pin 126 abutting against the limit arc groove 114; when the limit pin 126 cooperates with the locking groove 115 under the elastic force of the limit spring, the limit pin 126 can unlock and lock the valve plate 12.

[0044] In this embodiment, a locking groove 115 is provided, so that when the valve plate 121 is in a closed state, the limit pin 126 enters the locking groove 115 under the action of the limit spring, and cooperates with the locking groove 115 to lock the valve plate 12, so that the valve plate 121 remains in a closed state, thereby preventing the valve plate 12 from accidentally opening the sampling port 113; at the same time, when the valve plate 121 is in an open state, the limit pin 126, the limit spring and the locking groove 115 cooperate to keep the valve plate 121 in an open state, so that the chemical sludge can enter the sampling chamber 111.

[0045] For example, when the sampling piston 13 moves downward, the limit pin 126 overcomes the elastic force of the limit spring, so that the locking groove 115 enters the limit arc groove 114, thereby unlocking the valve plate 12 and opening the sampling port 113 until the limit pin 126 enters another locking groove 115. At this time, the limit pin 126 cooperates with the other locking groove 115 to keep the sampling port 113 in an open state.

[0046] like Figures 1 to 3 , Fig. 9As shown, a chemical sludge content detection device described in this embodiment, in some embodiments, the gas collecting mechanism includes a gas collecting body 21 that can slide into the accommodating cavity 112, the gas collecting body 21 is rotatably engaged with the top end of the first plug rod 132, the gas collecting body 21 is provided with a gas collecting cavity 25, a gas collecting piston 22 is movably provided in the gas collecting cavity 25, and a second spring 23 is connected between the gas collecting piston 22 and the gas collecting body 21; a stirring rod 16 is passed through the first piston 131, and a screw 17 is connected to the top end of the first plug rod 132, the screw 17 is rotatably passed through the gas collecting body 21 and is threadedly connected to the gas collecting piston 22; the central shaft 122 is provided with an annular groove 127 connected to the first spiral at the upper position of the driving groove.

[0047] Specifically, initially, the first piston 131 is located at the top dead center position, and the driving pin 134 is located in the annular groove 127. When the gas collecting body 21 is pressed, the gas collecting body 21 slides into the accommodating chamber 112, and the first piston 131 is pushed downward by the first plug rod 132. The driving pin 134 enters the first spiral section 124 from the annular groove 127, and then moves along the track of the driving groove, so that the effective volume of the sampling chamber 111 is reduced, so that the air in the sampling chamber 111 can be discharged;

[0048] After the sampling is completed, the first piston 131 is located at the top dead center position, that is, the driving pin 134 returns to the annular groove 127, and the VOC gas volatilized in the sampling chamber 111 enters the gas collecting chamber 25 through the gas collecting hose 24, so that the gas collecting chamber 25 gradually increases, thereby pushing the gas collecting piston 22 to compress the second spring 23 and move upward. At this time, during the upward movement of the gas collecting piston 22, due to the threaded connection between the gas collecting piston 22 and the screw 17, the gas collecting piston 22 drives the screw 17 to rotate, and the screw 17 drives the first piston 131 to rotate in the sampling chamber 111 through the first plug rod 132, and the driving pin 134 follows the rotation along the trajectory of the annular groove 127, and the first piston 131 drives the stirring rod 16 to rotate, thereby stirring the chemical sludge in the sampling chamber 111, so that the VOC gas volatilizes more fully, and at the same time prevents the outer layer of the sample from condensing into blocks and the internal sample from not being heated.

[0049] Specifically, the gas collecting piston 22 includes a second piston 221, a second plug rod 222 and a second axial hole 223 that penetrates the second piston 221 and the second plug rod 222. The second spring 23 is sleeved on the outer wall of the second plug rod 222. The second piston 221 is slidably disposed in the gas collecting cavity 25. The upper end of the second plug rod 222 movably penetrates the gas collecting body 21.

[0050] In some embodiments of the chemical sludge content detection device described in this embodiment, there are multiple stirring rods 16, and the multiple stirring rods 16 are distributed circumferentially on the first piston 131. In this embodiment, by providing multiple stirring rods 16, stirring is more sufficient, and VOC gas in the chemical sludge is more fully volatilized.

[0051] like Figures 1 to 3 As shown, a chemical sludge content detection device described in this embodiment, in some embodiments, the outer wall of the gas collecting body 21 is rotatably sleeved with a condenser 3, and the condenser 3 has a condensation chamber 31; the upper end of the gas collecting hose 24 is spirally coiled in the condensation chamber 31, and the upper end of the gas collecting hose 24 passes through the condenser 3 and the gas collecting body 21 and is connected to the gas collecting chamber 25, and the gas collecting chamber 25 is provided with an opening valve 26 for controlling the connection and disconnection of the gas collecting hose 24 and the gas collecting chamber 25 at the connection between the gas collecting hose 24 and the gas collecting body 21.

[0052] Specifically, the volatilized gas in the sampling chamber 111 enters the condensation chamber 31 through the gas collecting hose 24, and the condenser 3 condenses the gas located in the condensation chamber 31 and in the gas collecting hose 24, so that the volatilized water vapor condenses into liquid. Since the gas collecting hose 24 is spirally coiled in the condensation chamber 31, the liquid condensed from the water vapor can flow back to the sampling chamber 111 through the gas collecting hose 24, and the condensed VOC gas causes the opening valve 26 to open, and enters the gas collecting chamber 25 through the opening valve 26 for storage; the volatilized VOC gas is treated with gas impurities removal by condensation, which further helps to improve the accuracy and reliability of the detection results.

[0053] After the VOC gas in the chemical sludge in the sampling chamber 111 is completely volatilized, the condenser 3 is rotated so that the condenser 3 rotates relative to the gas collecting body 21, so that the gas collecting hose 24 is further wound and tightened in the condensation chamber 31, thereby squeezing the residual VOC gas in the gas collecting hose 24 into the gas collecting chamber 25, thereby reducing the loss of VOC gas and increasing the accuracy of the data.

[0054] like Figures 1 to 6 As shown, in some embodiments of the chemical sludge content detection device described in this embodiment, the upper end of the sampling body 11 is penetrated with an avoidance hole 116, and the avoidance hole 116 extends along the height direction of the gas collecting body 21; when the gas collecting mechanism slides downward into the accommodating cavity 112, the gas collecting hose 24 is movably inserted into the avoidance hole 116. In this embodiment, the avoidance hole 116 is provided so that when the gas collecting body 21 and the sampling piston 13 move up and down, the avoidance hole 116 is used to avoid the gas collecting hose 24, so that the volatilized VOC gas can smoothly enter the gas collecting cavity 25 through the gas collecting hose 24, and the structure is more reasonable.

[0055] like Figures 1 to 9 As shown, this embodiment also provides a detection method using the above detection device, which specifically includes the following steps:

[0056] Step S100: Sludge sampling: Press the gas collecting mechanism to exhaust the air inside the sampling chamber 111, keep the sampling piston 13 in a pressed state, put the sampling port 113 of the detection device into the sampling position, release the pressure on the gas collecting mechanism, and the sampling piston 13 moves upward, generating negative pressure inside the sampling chamber 111, so that the chemical sludge enters the sampling chamber 111 under the action of the pressure difference. After a certain volume of sample is taken, the valve plate 12 closes the sampling port 113 to ensure that the sample is stored in a closed state without sample loss. At this time, the mass of the weighing detection device is M1, and the mass of the gas collecting mechanism is M2. The mass of the detection device before sampling is M0, and the mass of the sample taken is M1-M0.

[0057] Step S200: gas impurity removal: the heating plate 15 starts to heat, and after the chemical sludge in the sampling chamber 111 is heated, the internal VOC gas volatilizes, and the VOC gas in the sampling chamber 111 is guided to the position of the condensation chamber 31 through the gas collecting hose 24, so that the water vapor in the VOC gas condenses into liquid at the position of the condensation chamber 31, and the condensed liquid flows back to the sampling chamber 111 through the gas collecting hose 24;

[0058] Step S300: Gas collection: After the VOC gas passes through the condenser 3 to remove impurities, it enters the gas collection cavity 25 from the gas collection hose 24. After the VOC gas in the sample is completely evaporated, the condenser 3 is rotated to roll up the gas collection hose 24. The VOC gas remaining in the gas collection hose 24 is squeezed into the gas collection cavity 25, thereby reducing the loss of VOC gas and increasing the accuracy of the data. At this time, the mass of the gas collection mechanism is measured as M3;

[0059] Step S400: Data analysis: According to the calculation formula (M3-M2) / (M1-M0), the percentage content of VOC gas in unit mass of sludge can be obtained, and then the VOC content in chemical sludge can be obtained.

[0060] The above is only a preferred embodiment of the present invention. Therefore, any equivalent changes or modifications made according to the structure, characteristics and principles described in the scope of the patent application of the present invention are included in the protection scope of the patent application of the present invention.

Claims

1. A chemical sludge content detection device, characterized in that: It includes sampling mechanism and gas collecting mechanism; The sampling mechanism comprises a sampling body, a sampling cavity is provided at the lower end of the sampling body, a receiving cavity is provided at the upper end of the sampling body, a sampling port connected with the sampling cavity is provided at the bottom of the sampling body, a valve plate for controlling the opening and closing of the sampling port is rotatably provided in the sampling cavity, a sampling piston is movably provided in the sampling cavity, the upper end of the sampling piston movably penetrates into the receiving cavity and is connected with a first spring between the bottom wall of the receiving cavity, and the sampling piston is transmission-connected with the valve plate to drive the valve plate to rotate; The gas collecting mechanism is slidably arranged in the accommodating cavity and can be detachably connected with the sampling piston. The gas collecting mechanism is provided with a gas collecting cavity and a gas collecting hose. The two ends of the gas collecting hose are respectively connected with the gas collecting cavity and the sampling cavity. The valve plate has a central axis; the sampling piston includes a first piston, a first plug rod, and a first axial hole provided on the first piston and the first plug rod; The central shaft is movably inserted into the first shaft hole, and a driving groove is provided on the outer wall of the central shaft. The driving groove includes a vertical section, a first spiral section connected to the upper end of the vertical section, and a second spiral section connected to the lower end of the vertical section; a driving pin is provided on the inner wall of the first shaft hole, and the driving pin is movably embedded in the driving groove.

2. A chemical sludge content detection device according to claim 1, characterized in that: The inner wall of the sampling cavity is provided with a heating plate.

3. A chemical sludge content detection device according to claim 1, characterized in that: The bottom of the sampling body is uniformly provided with a plurality of sampling ports along the circumferential direction, and the valve plate comprises a plurality of valve sheets distributed along the circumferential direction; the valve sheets correspond to the sampling ports one by one, and the valve sheets are in contact with the bottom wall of the sampling cavity.

4. A chemical sludge content detection device according to claim 3, characterized in that: A limit arc groove is arranged on the bottom wall of the sampling cavity, wherein one of the valve plates is connected to a limit pin, and the limit pin is movably embedded in the limit arc groove.

5. A chemical sludge content detection device according to claim 4, characterized in that: Both ends of the limit arc groove are provided with locking grooves, the limit pin is slidably inserted on the valve plate and a limit spring is connected between the valve plate; the limit spring keeps the limit pin abutting against the limit arc groove; When the limit pin cooperates with the locking groove under the elastic force of the limit spring, the limit pin can unlock and lock the valve plate.

6. A chemical sludge content detection device according to claim 1, characterized in that: The gas collecting mechanism comprises a gas collecting body which can slide into the accommodating cavity, the gas collecting body is rotatably engaged with the top end of the first plug rod, the gas collecting body is provided with a gas collecting cavity, a gas collecting piston is movably provided in the gas collecting cavity, and a second spring is connected between the gas collecting piston and the gas collecting body; A stirring rod is passed through the first piston, and a screw is connected to the top of the first plug rod. The screw is rotatably passed through the gas collecting body and is threadedly connected to the gas collecting piston; an annular groove connected to the first spiral section is provided on the central axis above the driving groove.

7. A chemical sludge content detection device according to claim 6, characterized in that: There are multiple stirring rods, and the multiple stirring rods are distributed on the first piston along the circumferential direction.

8. A chemical sludge content detection device according to claim 6, characterized in that: A condenser is rotatably sleeved on the outer wall of the gas collecting body, and the condenser has a condensation chamber; the upper end of the gas collecting hose is spirally coiled in the condensation chamber, and the upper end of the gas collecting hose passes through the condenser and the gas collecting body and is connected to the gas collecting chamber. The gas collecting chamber is provided with an opening valve at the connection between the gas collecting hose and the gas collecting body to control the connection and disconnection of the gas collecting hose and the gas collecting chamber.

9. A chemical sludge content detection device according to claim 1, characterized in that: An avoidance hole is provided through the upper end of the sampling body, and the avoidance hole extends along the height direction of the gas collecting body; when the gas collecting mechanism slides downward into the accommodating cavity, the gas collecting hose is movably inserted into the avoidance hole.

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