A multi-stage sampling device for municipal sewage

Abstract

The present invention relates to a multi-stage sampling device for municipal sewage in the field of sewage sampling technology. It aims to solve the problem that the distribution position of sampling holes in sewage cannot be accurately determined when sewage is sampled. It includes a support column, the lower part of the support column is slidably connected with a sliding sleeve, and the side wall of the sliding sleeve is slidably connected with sliding rods distributed in a rectangular array, and the sliding rods distributed in the rectangular array are commonly slidably connected with mirror-image support slide rods, and the mirror-image support slide rods are commonly slidably connected with evenly distributed installation slide blocks, and the installation slide blocks are provided with through holes, and the installation slide blocks are fixedly connected with a sampling barrel connected with the through holes, and a piston straight rod is slidably connected in the sampling barrel. The present invention achieves the purpose of uniform distribution in sewage of different depths by moving the sliding rod and the support slide rod, and coordinating the mutual distance of the three installation slide blocks, thereby ensuring the stability and accuracy of the relative positions of the multi-stage sampling of sewage of different depths by the device.

Description

Technical Field

[0001] The invention relates to a multi-stage sampling device for municipal sewage in the technical field of sewage sampling. Background Art

[0002] Municipal sewage is wastewater from the lives of urban residents and commercial activities. Municipal sewage contains a large number of pathogens and various chemical substances. In order to ensure public health and environmental safety, it is necessary to sample and analyze municipal sewage to achieve the purpose of monitoring water quality, evaluating pollution load, and monitoring sewage treatment effects. When the existing sewage sampling device performs multi-stage sampling of municipal sewage in the sampling well in the city, the conventional operation is that the operator puts the sampling device with multiple sampling holes into the sampling well, and then inserts the sampling device into the sewage in the sewage pipe connected to the sampling well for sampling. However, the depth of sewage in the sewage pipe will change over time, and it is impossible to ensure that all sampling holes are always evenly distributed in the water. In particular, the sampling holes close to the sewage surface will only extract part of the sewage or cannot be extracted at all, which seriously interferes with the accuracy of the subsequent detection of pollutant content in sewage, and at the same time affects the operator's analysis of pollutant distribution and pollutant concentration change trends. For this reason, it is necessary to invent a multi-stage sampling device with accurate control of sewage sampling depth. Summary of the invention

[0003] In order to solve the shortcoming that the distribution positions of sampling holes in sewage cannot be accurately determined when sampling sewage, the present invention provides a multi-stage sampling device for municipal sewage.

[0004] The technical solution is: a multi-stage sampling device for municipal sewage, including a support column, a sliding sleeve is slidably connected to the lower part of the support column, and a sliding rod distributed in a rectangular array is slidably connected to the side wall of the sliding sleeve, and the sliding rods distributed in the rectangular array are commonly slidably connected to a mirror-image support slide rod, and the mirror-image support slide rods are commonly slidably connected to a uniformly distributed installation slide block, and tension springs are fixedly connected between two adjacent installation slide blocks, and the installation slide block is provided with a through hole, and a sampling cylinder connected to its through hole is fixedly connected to the side of the installation slide block close to the sliding sleeve, and a one-way valve is provided at the connection between the sampling cylinder and the corresponding through hole of the installation slide block, a piston straight rod is slidably connected in the sampling cylinder, and a tension spring is fixedly connected between the sampling cylinder and the corresponding piston straight rod, and the upper side of the sampling cylinder is connected to a discharge pipe through a valve, and a rotating mechanism for controlling the direction of the through holes of the uniformly distributed installation slide blocks is provided on the upper side of the support column, and a retracting mechanism for controlling the movement and reset of the uniformly distributed installation slide blocks is provided in the support column.

[0005] As a preferred embodiment of the present invention, the lower sides of the mirror-image support slide bars are both in an inclined state, so as to assist the sliding sleeve in locating the lowest point in the sewage pipe.

[0006] As a preferred embodiment of the present invention, the rotating mechanism includes a support ring, which is rotatably connected to the upper side of the support column, a guide plate is fixedly connected to the side wall of the sliding sleeve, a mirrored inclined surface is arranged on the guide plate, and a positioning component for positioning the support column in the sampling well is arranged on the lower side.

[0007] As a preferred embodiment of the present invention, the positioning assembly includes an extrusion cylinder, which is fixedly connected to the lower side of the support column, a piston support rod is slidably connected in the extrusion cylinder, a tension spring is fixedly connected between the extrusion cylinder and the piston support rod, a rotating ring is rotatably connected to the lower side of the sliding sleeve, a tension spring is fixedly connected between the rotating ring and the extrusion cylinder, the upper side of the extrusion cylinder is connected to a first liquid guide tube, a first liquid storage chamber connected to the first liquid guide tube is provided at the upper part of the support column, a fixed block is fixedly connected to the side wall of the support column, the first liquid guide tube penetrates the fixed block and is fixedly connected to the fixed block, and circumferentially and evenly distributed first hydraulic cylinders are fixedly connected to the side wall of the support column, and the circumferentially and evenly distributed first hydraulic cylinders are all connected to the first liquid storage chamber.

[0008] As a preferred embodiment of the present invention, the telescopic end of the first hydraulic cylinder is fixedly connected with an extrusion block, and a curved surface is provided on the side of the extrusion block on the telescopic end of the first hydraulic cylinder close to the inner wall of the detection well, and the curvature of the curved surface is the same as the curvature of the inner wall of the detection well, which is used to increase the contact area between the extrusion block on the telescopic end of the first hydraulic cylinder and the inner wall of the detection well.

[0009] As a preferred embodiment of the present invention, the retracting and releasing mechanism includes a pull rope, one end of which is fixedly connected to the mounting slider close to the extrusion cylinder side, the pull rope penetrates the other mounting sliders, the support column and the first liquid storage chamber, the sliding sleeve is provided with a rectangular hole on the side close to the mirror image of the support slide rod, a spring is fixedly connected between the support slide rod and the sliding sleeve, the pull rope passes through the rectangular hole of the sliding sleeve, the mounting slider away from the extrusion cylinder side is connected to an airbag through a fixed rope, the evenly distributed mounting sliders are jointly provided with a control component for controlling sampling, the mounting slider away from the extrusion cylinder side is provided with an anti-blocking component for preventing impurities in sewage from clogging its through hole, and the middle part of the support column is provided with a limiting component for assisting in positioning the sampling position of the evenly distributed mounting sliders.

[0010] As a preferred embodiment of the present invention, the control component includes evenly distributed second hydraulic cylinders, and the evenly distributed second hydraulic cylinders are respectively fixed to adjacent mounting slide blocks, and the telescopic end of the second hydraulic cylinder is fixed to a limit plate slidingly connected to the upper side of the adjacent sampling tube through a tension spring, and a limiting inclined surface is provided in the middle of the limit plate, and a groove is provided on the piston straight rod for limiting cooperation with the limiting inclined surface of the adjacent limit plate, and one side of the evenly distributed second hydraulic cylinders is commonly connected to a second liquid guide tube, and the end of the second liquid guide tube away from the evenly distributed second hydraulic cylinders is connected to a liquid storage bag.

[0011] As a preferred embodiment of the present invention, the anti-blocking component includes a guide filter plate, which is fixedly connected to the mounting slide block away from the side of the extrusion cylinder, and fixed filter plates are arranged at the evenly distributed through holes of the mounting slide block, and a filter cylinder slidably connected to an adjacent fixed filter plate is fixedly connected to the through hole of the mounting slide block close to the side of the extrusion cylinder, and a third hydraulic cylinder is fixedly connected to the side wall of the sampling cylinder close to the side of the extrusion cylinder, and the telescopic end of the third hydraulic cylinder is fixedly connected to the adjacent piston straight rod, and the third hydraulic cylinder is connected to a third liquid guide tube, and a fourth hydraulic cylinder connected to the third liquid guide tube is fixedly connected to the mounting slide block close to the side of the extrusion cylinder, and the telescopic end of the fourth hydraulic cylinder is fixedly connected to the adjacent fixed filter plate.

[0012] As a preferred embodiment of the present invention, the limit assembly includes a sliding plate, which is slidably connected to the middle part of the support column, the sliding plate penetrates the fixed block, a friction force is arranged between the sliding plate and the fixed block, the sliding plate is provided with a mirrored through hole, the mirrored through holes of the sliding plate are all communicated and cooperated with the first liquid guide tube, a one-way valve is arranged in the through hole on one side of the sliding plate, a second liquid storage cavity is provided in the middle part of the support column, a frustum block and a connecting slider are slidably connected in the second liquid storage cavity, the frustum block is extruded and fitted with the sliding plate, a spring is fixedly connected between the frustum block and the support column, the pull rope penetrates the second liquid storage cavity, the frustum block and the connecting slider, the pull rope is fixedly connected to the connecting slider, and the connecting slider is extruded and fitted with the frustum block.

[0013] As a preferred embodiment of the present invention, it also includes a stabilizing mechanism, which is arranged on the mirror image support slide bar, and the stabilizing mechanism is used to lock the relative position of the mirror image support slide bar and the evenly distributed mounting slide bar, and the stabilizing mechanism includes an elastic telescopic rod, which is fixedly connected to the upper side of the mirror image support slide bar, the elastic telescopic rod is connected to a first flow guide tube, the sliding sleeve is fixedly connected to a transmission hydraulic cylinder connected to the first flow guide tube, the telescopic end of the transmission hydraulic cylinder is fixedly connected to a first friction block slidably connected to the sliding sleeve through a spring, the first friction block is frictionally matched with the support column, and a double-headed hydraulic cylinder is fixedly connected to the evenly distributed mounting slide bar, the two telescopic ends of the double-headed hydraulic cylinder are fixedly connected to a second friction block which is squeezed and matched with an adjacent support slide bar, and the middle part of the double-headed hydraulic cylinder is connected to a second flow guide tube which is connected to an adjacent second hydraulic cylinder near a side of an adjacent sampling tube.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. The present invention achieves the purpose of uniform distribution in sewage at different depths by moving the sliding rod and the supporting sliding rod, in coordination with the mutual distance of the three mounting slide blocks, thereby ensuring the stability and accuracy of the relative positions of the multi-stage sampling of sewage at different depths by the device.

[0015] 2. The present invention achieves the purpose of locating the flow direction of sewage by impacting the guide plate in the rotating mechanism, so that the sampling position of the device is opposite to the flow direction of sewage, avoiding suspended matter and pollutants in the sewage from being carried away by the water flow due to downstream flow, making the sample more representative.

[0016] 3. The present invention filters large impurities in sewage through the guide filter plate, fixed filter plate and filter cartridge in the anti-blocking component to prevent large particles from clogging the sampling holes of the sampling device, thereby ensuring the normal operation of the device and the smoothness of the sampling process.

[0017] 4. The present invention fixes the sliding sleeve and the mounting slider by the first friction block and the second friction block in the stabilizing mechanism, thereby ensuring that the relative positions of the samples taken in sewage at different depths are the same each time, so that the sampled samples can more accurately reflect the water quality conditions at a specific location. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0019] Figure 2 It is a three-dimensional structural schematic diagram of the parts of the support ring and the first liquid guide tube of the present invention;

[0020] Figure 3 It is a three-dimensional structural schematic diagram of the parts of the extrusion cylinder and the piston support rod of the present invention;

[0021] Figure 4It is a three-dimensional structural schematic diagram of the sliding sleeve and the pull rope parts of the present invention;

[0022] Figure 5 It is a three-dimensional structural schematic diagram of the parts of the second hydraulic cylinder and the limit plate of the present invention;

[0023] Figure 6 It is a three-dimensional structural schematic diagram of the parts for fixing the filter plate and the filter cartridge of the present invention;

[0024] Figure 7 It is a three-dimensional structural schematic diagram of the truncated cone block and the parts connected to the sliding block of the present invention;

[0025] Figure 8 It is a three-dimensional structural schematic diagram of the sampling tube and the piston straight rod parts of the present invention;

[0026] Fig. 9 It is a three-dimensional structural schematic diagram of the parts of the elastic telescopic rod and the first guide pipe of the present invention;

[0027] Fig.10 It is a three-dimensional structural schematic diagram of the parts of the double-head hydraulic cylinder and the second friction block of the present invention.

[0028] Figure numbers: 1-support column, 2-sliding sleeve, 3-sliding rod, 4-supporting sliding rod, 5-installing slider, 6-sampling cylinder, 7-piston straight rod, 201-support ring, 202-guide plate, 301-extrusion cylinder, 302-piston support rod, 303-rotating ring, 304-first liquid guide tube, 305-fixing block, 306-first liquid storage chamber, 307-first hydraulic cylinder, 401-pull rope, 402-airbag, 501-second hydraulic cylinder, 502-limiting plate, 503-second liquid guide tube Tube, 504-liquid storage bag, 601-guide filter plate, 602-fixed filter plate, 603-filter cartridge, 604-third hydraulic cylinder, 605-third liquid guide tube, 606-fourth hydraulic cylinder, 701-sliding plate, 702-second liquid storage chamber, 703-truncated table block, 704-connecting slider, 801-elastic telescopic rod, 802-first guide tube, 803-transmission hydraulic cylinder, 804-first friction block, 805-double-head hydraulic cylinder, 806-second friction block, 807-second guide tube. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-Figure 10 , the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0030] Example 1: When the operator uses the existing sampling device to perform multi-stage sampling of sewage at different depths in the sewage pipe, since the depth of the sewage in the sewage pipe changes over time, it is impossible to ensure that all sampling holes remain evenly distributed in the water. In particular, the sampling holes close to the sewage surface may only extract part of the sewage or fail to extract at all, which seriously interferes with the subsequent accurate judgment of the distribution of pollutants in the sewage and the concentration change trend.

[0031] A multi-stage sampling device for municipal sewage, referring to Figure 1-Figure 5 As shown, it includes a support column 1, and the lower part of the support column 1 is limitedly slidably connected with a sliding sleeve 2, and the sliding sleeve 2 only slides in a small range on the lower side of the support column 1 and does not rotate relatively. Figure 1 The vertically distributed pipeline is the sampling well, and the horizontally distributed pipeline is the sewage pipe. The sewage flows from left to right in the sewage pipe. Four sliding rods 3 distributed in a rectangular array are slidably connected to the side wall of the sliding sleeve 2. The four sliding rods 3 are all located on the left side of the sliding sleeve 2. The four sliding rods 3 are commonly limited and slidably connected to two supporting sliding rods 4 with front and rear mirror images. A spring is fixedly connected between the supporting sliding rod 4 and the sliding sleeve 2. The spring is initially in a compressed state. The lower sides of the two supporting sliding rods 4 are both inclined from top to bottom to the right, which is used to assist the sliding sleeve 2 in locating the lowest point in the sewage pipe. Three mounting slide blocks 5 evenly distributed up and down are commonly slidably connected between the two supporting sliding rods 4. A weight block is arranged on the lower side of the lower mounting slide block 5. Tension springs are fixedly connected between two adjacent mounting slide blocks 5. A through hole is arranged in the middle of the mounting slide block 5. A sampling barrel 6 is fixedly connected to the right side of the mounting slide block 5. The sampling barrel 6 and the corresponding mounting slide block 5 The through hole is connected to the sampling tube 6, and a one-way valve is provided at the connection point between the sampling tube 6 and the corresponding mounting slide block 5 through hole, which is used to allow the sampled sewage to enter the sampling tube 6 for temporary storage only through the mounting slide block 5 through hole. A piston straight rod 7 is slidably connected in the sampling tube 6, and a tension spring is fixedly connected between the sampling tube 6 and the corresponding piston straight rod 7. The tension spring is initially in a stretched state, and a drain pipe is connected to the upper side of the sampling tube 6 through a valve, which is used to discharge the sampled sewage for detection and analysis. A rotating mechanism for controlling the direction of the through holes of the three mounting slide blocks 5 is provided on the upper side of the support column 1, and a retracting and releasing mechanism for controlling the movement and reset of the three mounting slide blocks 5 is provided in the support column 1. Through the movement of the sliding rod 3 and the supporting slide bar 4, in coordination with the movement of the three mounting slide blocks 5, the three mounting slide blocks 5 can quickly locate the same sampling position in sewage of different depths, thereby achieving the purpose of multi-stage sampling and ensuring the accuracy of the sampling position control of the device.

[0032] Reference Figure 1-Figure 3As shown, the rotating mechanism includes a support ring 201, which is rotatably connected to the upper side of the support column 1, so that the support column 1 can rotate freely under the support of the support ring 201. A guide plate 202 is fixedly connected to the side wall of the sliding sleeve 2, and the guide plate 202 is located on the right side of the sliding sleeve 2. A mirror image inclined surface is arranged on the guide plate 202, and the spacing between the two inclined surfaces gradually increases from left to right, so that the guide plate 202 drives the sliding sleeve 2 and the support column 1 to rotate to a state parallel to the sewage flow direction under the impact of sewage flow, thereby making the through holes of the three mounting sliders 5 face opposite to the sewage flow direction, and the lower side of the support column 1 is provided with a positioning component for locating its position in the sampling well, and the guide plate 202 and its upper inclined surface are impacted by the flowing sewage, so as to achieve the purpose of making the through holes of the three mounting sliders 5 face opposite to the sewage flow direction, thereby preventing suspended matter and pollutants in the sewage from being carried away by the water flow due to downstream, and making the sewage sample more representative.

[0033] Reference Figure 1-Figure 3 and Figure 7As shown, the positioning assembly includes an extrusion cylinder 301, which is fixed to the lower side of the support column 1, and a piston support rod 302 is slidably connected in the extrusion cylinder 301. The piston support rod 302 is pressed and matched with the bottom of the sampling well, and a tension spring is fixed between the extrusion cylinder 301 and the piston support rod 302. A rotating ring 303 is rotatably connected to the lower side of the sliding sleeve 2, and a tension spring is fixed between the rotating ring 303 and the extrusion cylinder 301. The upper side of the extrusion cylinder 301 is connected to a first liquid guide tube 304, and a first liquid storage is provided at the upper part of the support column 1. The first liquid storage cavity 306 is connected to the first liquid guide tube 304. A fixed block 305 is fixedly connected to the middle of the side wall of the support column 1. The first liquid guide tube 304 penetrates the fixed block 305 and is fixedly connected to it. Six first hydraulic cylinders 307 are fixedly connected to the side wall of the support column 1 and are evenly distributed in the circumferential direction. The distribution is shown as two groups, each group consisting of three first hydraulic cylinders 307 evenly distributed in the circumferential direction. The six first hydraulic cylinders 307 are all connected to the first liquid storage cavity 306. The six first hydraulic cylinders 307 are connected to the first liquid storage cavity 306. The telescopic end of 07 is synchronously retracted or extended to achieve the rapid positioning of the support column 1 in the sampling well, so that the axis of the support column 1 coincides with the axis of the sampling well. The telescopic end of the first hydraulic cylinder 307 is fixedly connected with an extrusion block. The extrusion block on the telescopic end of the first hydraulic cylinder 307 is provided with an arc surface on one side close to the inner wall of the detection well. The curvature of the arc surface is the same as the curvature of the inner wall of the detection well, which is used to increase the contact area between the extrusion block on the telescopic end of the first hydraulic cylinder 307 and the inner wall of the detection well, thereby improving the support column 1 through the extrusion block on the telescopic end of the first hydraulic cylinder 307. The stability of the block fixed in the sampling well is to prevent sewage from impacting the device and causing shaking. The upper side of the piston support rod 302 in the extrusion cylinder 301, the first liquid guide tube 304, the first liquid storage chamber 306 and the first hydraulic cylinder 307 are all filled with hydraulic oil. Through the squeezing effect of the piston support rod 302 and the bottom of the sampling well, the support column 1 is quickly fixed in the sampling well, and the vertical plane where the through holes of the three mounting sliders 5 are located coincides with the vertical mirror plane of the sewage pipe, ensuring the consistency of the sewage sampling position of the device in multiple stages.

[0034] Reference Figure 2-Figure 5 and Figure 7As shown, the retracting and releasing mechanism includes a pull rope 401, one end of which is fixedly connected to the mounting slider 5 on the lower side, and the pull rope 401 penetrates the other two mounting sliders 5, the support column 1 and the first liquid storage chamber 306. The upper end of the support column 1 is provided with a locking device (not shown in the figure) for controlling whether the pull rope 401 moves. Initially, the pull rope 401 is in a locked state. The springs between the support slide bar 4 and the sliding sleeve 2 and the springs between the three mounting sliders 5 are compressed and stored through the pull rope 401. A rectangular hole is provided on the left side of the sliding sleeve 2, and the pull rope 401 passes through the sliding sleeve 2. The upper mounting slider 5 is connected with an air bag 402 through a fixed rope, which is used to ensure that the upper mounting slider 5 always has a fixed depth from the sewage surface when sampling sewage. The three mounting sliders 5 are jointly provided with a control component for controlling the sampling process. The upper mounting slider 5 is provided with an anti-blocking component for preventing impurities in the sewage from clogging its through hole. The middle part of the support column 1 is provided with a limit component for assisting in positioning the sampling positions of the evenly distributed mounting sliders 5. By pulling and releasing the pull rope 401, the three mounting sliders 5 can be moved, positioned, sampled and retracted.

[0035] Reference Figure 1-Figure 5 and Figure 8 As shown, the control assembly includes three second hydraulic cylinders 501, and the three second hydraulic cylinders 501 are respectively fixed to the adjacent mounting slide blocks 5. The telescopic ends of the second hydraulic cylinders 501 are fixed to the limit plate 502 through tension springs. The tension springs are used to delay the reset of the limit plate 502 when the telescopic ends of the second hydraulic cylinders 501 are reset. The limit plate 502 is slidably connected to the upper side of the adjacent sampling tube 6. A limit inclined surface is arranged in the middle of the limit plate 502, and the inclined surface is inclined to the right from top to bottom. A groove is arranged on the piston straight rod 7, and the groove on the piston straight rod 7 is connected to the adjacent limit The plate 502 is limited by the inclined surface, and the left sides of the three second hydraulic cylinders 501 are commonly connected to the second liquid guiding tube 503, and the upper end of the second liquid guiding tube 503 is connected to the liquid storage bag 504. After the device is placed in the sampling well, the liquid storage bag 504 is always held in the hand of the operator. The second hydraulic cylinder 501, the second liquid guiding tube 503 and the liquid storage bag 504 are all filled with hydraulic oil. The movement of the limit plate 502 is controlled by the compression of the liquid storage bag 504, so as to achieve the purpose of controlling the sampling time of the device, thereby ensuring the controllability of the sewage sampling state of the device.

[0036] Reference Figure 4 and Figure 6As shown, the anti-blocking component includes a guide filter plate 601, the left part of the guide filter plate 601 is V-shaped, which is used to guide impurities flowing on the sewage surface to both sides, and the guide filter plate 601 is fixedly connected to the upper mounting slider 5, and fixed filter plates 602 are arranged at the through holes of the three mounting sliders 5, which are used to filter suspended impurities in the sewage to prevent the suspended impurities from entering the sampling cylinder 6 on the upper side, thereby reducing the total amount of sewage sampling, and a filter cartridge 603 is fixedly connected to the through hole of the lower mounting slider 5, and the filter cartridge 603 is slidably connected to the adjacent fixed filter plate 602, and the fixed filter plate 602 on the lower side slides left and right in the filter cartridge 603 to push away the sludge entering therein and increase the flow rate of sewage entering the sampling cylinder 6, and the side wall of the lower sampling cylinder 6 is fixedly connected to a third hydraulic cylinder 604, the telescopic end of the third hydraulic cylinder 604 is fixedly connected to the adjacent piston straight rod 7, the third hydraulic cylinder 604 is connected to the third liquid guide tube 605, and the fourth hydraulic cylinder 606 is fixedly connected to the lower mounting slide block 5, the fourth hydraulic cylinder 606 is connected to the third liquid guide tube 605, the telescopic end of the fourth hydraulic cylinder 606 is fixedly connected to the adjacent fixed filter plate 602, the third hydraulic cylinder 604, the third liquid guide tube 605 and the fourth hydraulic cylinder 606 are all filled with hydraulic oil, and the environmental sewage in the through hole of the mounting slide block 5 with different depths is filtered through the guide filter plate 601, the fixed filter plate 602 and the filter cartridge 603, thereby improving the stability of the sewage flow speed entering the through hole of the mounting slide block 5, ensuring the sampling speed of the work, and improving the working efficiency of sewage sampling of the device.

[0037] Reference Figure 2 and Figure 7As shown, the limiting assembly includes a sliding plate 701, which is slidably connected to the middle part of the support column 1, and the sliding plate 701 penetrates the fixed block 305. A friction force is set between the sliding plate 701 and the fixed block 305, so that the sliding plate 701 is relatively stationary with the fixed block 305 without being affected by external forces. Two through holes with left and right mirror images are set on the sliding plate 701. The two through holes on the sliding plate 701 are respectively connected and cooperated with the first liquid guide tube 304. A one-way valve is set in the through hole on the right side of the sliding plate 701, which is used to make the hydraulic oil in the first liquid guide tube 304 flow only upward, so as to ensure the stability of the six first hydraulic cylinders 307 in positioning and fixing the support column 1. A second liquid storage chamber 702 is set in the middle part of the support column 1, and the second liquid storage chamber 702 is located below the first liquid storage chamber 306. A truncated cone block 703 is slidably connected in the second liquid storage chamber 702. And the connecting slider 704, the truncated cone block 703 is located above the connecting slider 704, the truncated cone block 703 is squeezed and matched with the sliding plate 701, and is used to control the switching of the through hole on the sliding plate 701 that is connected to the first liquid guide tube 304. A spring is fixedly connected between the truncated cone block 703 and the support column 1, and the pull rope 401 penetrates the second liquid storage chamber 702, the truncated cone block 703 and the connecting slider 704. The pull rope 401 is fixedly connected to the connecting slider 704, and the connecting slider 704 is driven to move upward by the pull rope 401, so as to achieve the purpose of controlling the truncated cone block 703 to switch the through hole on the sliding plate 701 that is connected to the first liquid guide tube 304. The connecting slider 704 is squeezed and matched with the truncated cone block 703, and the coordinated movement of the truncated cone block 703 and the connecting slider 704 can quickly release the support column 1 from being fixed in the center of the sampling well, thereby ensuring the convenience of using the device.

[0038] When the operator uses the device to sample municipal sewage, the operator puts the device into the sampling well, and then inserts the lower side of the device into the sewage in the sewage pipe connected to the sampling well. The operator holds the support ring 201, and the guide plate 202 is impacted by the sewage flowing from left to right in the sewage. The sewage passes through the inclined surfaces on the front and rear sides of the guide plate 202. The impact of the guide plate 202 drives the support column 1 and the sliding sleeve 2 to rotate, and the support column 1 and the support ring 201 rotate relatively. When the guide plate 202 rotates to the right side of the sliding sleeve 2, the guide plate 202 is parallel to the flow direction of the sewage and maintains it. Then the operator presses the device downward through the support ring 201 and the support column 1, and the piston support rod 302 contacts the silt or the bottom of the well on the lower side of the extrusion sampling well, and the piston support rod 302 stops moving. As the support column 1 drives the extrusion cylinder 301 to move downward, the piston support rod 302 moves into the extrusion cylinder 301, and the tension spring connected to the piston support rod 302 is stretched.

[0039] During the movement of the piston support rod 302 into the extrusion cylinder 301, the hydraulic oil on the upper side of the piston support rod 302 in the extrusion cylinder 301 flows into the first liquid storage chamber 306 through the first liquid guide tube 304 and the one-way valve of the sliding plate 701, and the hydraulic oil in the first liquid storage chamber 306 simultaneously enters the six first hydraulic cylinders 307, the telescopic ends of the first hydraulic cylinders 307 extend, and the telescopic ends of the first hydraulic cylinders 307 contact the inner wall surface of the extrusion sampling well through the extrusion blocks, and the inner wall surface of the sampling well is squeezed by the extrusion blocks of the telescopic ends of the six first hydraulic cylinders 307, so as to achieve the purpose of fixing the support column 1 in the center of the sampling well, and cooperate with the guide plate 202 to rotate under the impact of sewage, so that the vertical plane where the three sampling cylinders 6 are located coincides with the vertical mirror plane of the sewage pipe, thereby ensuring the centered state of the sampling position of the device and improving the accuracy of continuous sampling of the device.

[0040] After the support column 1 is fixed in the sampling well by the six first hydraulic cylinders 307, the operator releases the support ring 201, and the device remains fixed in the sampling well without moving. Then the operator releases the locking device of the pull rope 401 at the upper end of the support column 1, and the pull rope 401 relaxes. The two support slide bars 4 drive the three mounting slide bars 5 and the parts connected to them to slide to the left under the elastic force of the springs connected to them. The three mounting slide bars 5 drive the pull rope 401 to slide in the support column 1. When the support slide bars 4 move to the limit on the corresponding two sliding bars 3, the two support slide bars 4 drive the four sliding bars 3 to move synchronously to the left.

[0041] When the two support slide bars 4 move to the left, the inclined surfaces on the lower sides of the two support slide bars 4 contact and squeeze the edge connected to the lower side of the sewage pipe and the sampling well, and the two support slide bars 4 drive the sliding sleeve 2 to move upward through the sliding rod 3. The sliding sleeve 2 slides upward relative to the support column 1, and the sliding sleeve 2 stretches the tension spring connected to it. When the upper side of the support slide bar 4 contacts the connecting part of the sewage pipe and the sampling well, the support slide bar 4 stops moving. Then, as the pull rope 401 relaxes, the upper mounting slide bar 5 moves upward under the buoyancy of the air bag 402 connected to it, and finally stops at a certain distance from the sewage surface. The lower mounting slide bar 5 moves downward under the action of the connected weight, and the mounting slide bar 5 drives the parts connected to it to move downward until they contact the sludge and stop. The three mounting slide bars 5 move away from each other, and the tension spring between two adjacent mounting slide bars 5 among the three mounting slide bars 5 is stretched. The middle mounting slide bar 5 maintains the same spacing as the mounting slide bars 5 on the upper and lower sides through the tension of the tension springs on its upper and lower sides. When the three mounting slide bars 5 are stable, the operator presses the liquid storage bag 504.

[0042] When the operator presses the liquid storage bag 504, the hydraulic oil in the liquid storage bag 504 flows into the left side of the three second hydraulic cylinders 501 through the second liquid guide tube 503, and the telescopic end of the second hydraulic cylinder 501 drives the corresponding limit plate 502 to move to the right through the tension spring, and the limit inclined surface of the limit plate 502 moves out from the groove of the corresponding piston straight rod 7, and the limit of the piston straight rod 7 is released. The piston straight rod 7 moves into the corresponding sampling tube 6 under the tension of the tension spring connected thereto, and the sewage of the corresponding depth in the sewage pipe enters the upper side of the piston straight rod 7 in the sampling tube 6 through the through hole on the mounting slide block 5 and the one-way valve, completing the sampling of the sewage at this position. The purpose of positioning the sewage sampling section is achieved by moving the sliding rod 3 and the supporting sliding rod 4. In conjunction with the three mounting slide blocks 5 and the tension springs connected thereto, the purpose of adaptively sampling sewage of different depths when the sewage depth in the sewage pipe changes is achieved, thereby ensuring the uniformity of the distribution of the sampling positions of the device in the sewage.

[0043] In the process of sewage passing through the through hole on the mounting slider 5 and entering the corresponding sampling tube 6, due to the presence of impurities in the sewage and the different compositions of impurities at different depths, for the through hole of the upper mounting slider 5, in the process of sewage flowing toward the upper mounting slider 5, large pieces of debris floating in the sewage are separated and guided by the guide filter plate 601 to flow away on the front and rear sides, and the sewage enters the through hole of the upper mounting slider 5 after being filtered by the fixed filter plate 602. There are fewer impurities suspended in the middle of the sewage, and the sewage only flows into the through hole of the middle mounting slider 5 after being filtered by the fixed filter plate 602. There is more silt at the position of the through hole of the lower mounting slider 5, and the lower piston straight rod 7 drives the telescopic end of the third hydraulic cylinder 604 to retract during the downward movement, and the hydraulic oil in the fourth hydraulic cylinder 606 flows into the third hydraulic cylinder 604 through the third liquid guide pipe 605. The telescopic end of 6 drives the lower fixed filter plate 602 to move leftward, and the lower fixed filter plate 602 slides leftward in the filter cartridge 603 to push away the silt, and the sewage on the lower side is filtered through the lower fixed filter plate 602 and the filter cartridge 603 and enters the lower side mounting slide block 5. When the corresponding piston straight rod 7 in the sampling cylinder 6 moves downward to the limit position, the piston straight rod 7 stops moving, and the sampled sewage is stored in the sampling cylinder 6. The device completes the sampling and storage of sewage. Then, the operator releases the liquid storage capsule 504, and the liquid storage capsule 504 recovers under the action of its own elasticity. The hydraulic oil in the second liquid guide tube 503 performs the above-mentioned reverse flow, and the telescopic end of the second hydraulic cylinder 501 is retracted. Since the limit plate 502 is in contact with the corresponding piston straight rod 7, the limit plate 502 cannot move, and the tension spring between the telescopic end of the second hydraulic cylinder 501 and the adjacent limit plate 502 is stretched.

[0044] When the operator releases the liquid storage bag 504, the operator pulls the pull rope 401 upwards, and the pull rope 401 drives the installation slide block 5 to move in the above-mentioned reverse direction and approach each other. At the same time, the pull rope 401 drives the support slide bar 4 to move to the right along the sliding rod 3 through the installation slide block 5, and the sliding rod 3 does not move. The support slide bar 4 moves to compress the spring connected to it. When the support slide bar 4 moves to the right on the corresponding sliding rod 3 to the limit, the support slide bar 4 drives the sliding rod 3 to move to the right synchronously. The sliding rod 3, the support slide bar 4 and the installation slide block 5 finally return to their initial positions. The support slide bar 4 releases contact with the sampling well, and the sliding sleeve 2 drives the parts connected to it to move downward and reset under the tension of the tension spring connected to the rotating ring 303. During the pulling process of the pull rope 401 In the process, when the pull rope 401 returns to its initial position and continues to be pulled, the pull rope 401 drives the truncated cone block 703 to move upward through the connecting slider 704, and the truncated cone block 703 compresses the spring connected to it. The truncated cone block 703 contacts and squeezes the sliding plate 701. The through hole of the sliding plate 701 is connected to the first liquid guide tube 304. The piston support rod 302 moves relative to the extrusion cylinder 301 and resets under the tension of the tension spring connected to it. The hydraulic oil in the first liquid guide tube 304 flows in the above-mentioned reverse direction, and the telescopic end of the first hydraulic cylinder 307 is retracted, and then the pull rope 401 is released for a distance, and the pull rope 401 returns to its initial position. At the same time, the truncated cone block 703 returns to its initial position under the elastic force of the connected spring, and finally the locking device is re-controlled to fix the pull rope 401.

[0045] When the fixation of the device is released, the operator takes the device out of the sampling well, opens the valves on the three sampling tubes 6, and manually pulls the piston rod 7 to reset it. The lower fixed filter plate 602 performs the above-mentioned reverse movement, and the telescopic ends of the third hydraulic cylinder 604 and the fourth hydraulic cylinder 606 are restored to their initial states. At the same time, the operator takes the sampled sewage from the discharge pipe. When the piston rod 7 returns to its initial position, the groove on the piston rod 7 is aligned with the limiting inclined surface of the limiting plate 502. The limiting plate 502 moves to re-limit the piston rod 7 under the tension of the tension spring connected thereto. Finally, the operator presses the sliding plate 701 into the support column 1 to restore it to its initial position, and the one-way valve on the sliding plate 701 is restored to the state of connection with the first liquid guide tube 304. At this point, all parts are restored to their initial states, and the device is cleaned and waits for the next use.

[0046] Example 2: When an operator uses an existing sewage sampling device to take samples through a sampling well, the sampling device will shake due to the impact of the sewage flow on the sampling probe, and the position of the sampling probe in the water is constantly changing, so that the sewage sample taken by the sampling device does not come from a fixed position in the sewage, which affects the effectiveness of the sewage samples taken by the device and reduces the accuracy of the pollutant concentration data detected by the sewage sampled by the device.

[0047] Based on Example 1, Figure 3 , Fig. 9 and Fig.10 As shown, it also includes a stabilizing mechanism, which is arranged on the two supporting slide bars 4, and the stabilizing mechanism is used to lock the relative positions of the two supporting slide bars 4 and the three mounting slide bars 5. The stabilizing mechanism includes an elastic telescopic rod 801, which is fixedly connected to the upper sides of the two supporting slide bars 4, and the length of the supporting slide bar 4 is greater than the inner diameter of the sewage pipe. The elastic telescopic rod 801 is connected to the first guide pipe 802, and a transmission hydraulic cylinder 803 is fixedly connected to the upper side of the sliding sleeve 2, and the transmission hydraulic cylinder 803 is connected to the first guide pipe 802. The telescopic end of the transmission hydraulic cylinder 803 is fixedly connected to the first friction block 804 through a spring, and the first friction block 804 is slidably connected to the sliding sleeve 2. The first friction block 804 is extruded and matched with the support column 1 to fix the relative sliding state of the support column 1 and the sliding sleeve 2. The three mounting slide bars 5 are all fixedly connected with a double-headed hydraulic cylinder 805, and the two ends of the double-headed hydraulic cylinder 805 The telescopic ends are fixedly connected with a second friction block 806, and the second friction block 806 is frictionally matched with the adjacent supporting slide bar 4 to relatively fix the installation slide block 5 and the two supporting slide bars 4. The middle part of the double-headed hydraulic cylinder 805 is connected with a second guide pipe 807, and the second guide pipe 807 is connected to the right side of the adjacent second hydraulic cylinder 501. The elastic telescopic rod 801, the first guide pipe 802, the transmission hydraulic cylinder 803, the double-headed hydraulic cylinder 805 and the second guide pipe 807 are all filled with hydraulic oil. Through the movement of the first friction block 804 and the second friction block 806, the support column 1 and the sliding sleeve 2 and the installation slide block 5 and the two supporting slide bars 4 are relatively fixed, which avoids the installation slide block 5 in the device from floating up and down during sewage sampling due to sewage flow, ensures that the sampling positions are evenly distributed in the sewage each time the sewage is sampled, and makes the sampled samples more accurately reflect the water quality conditions at a specific location.

[0048] The placement and sampling reset operations of the above-mentioned device are repeated. When the locking device releases the lock on the pull rope 401, the pull rope 401 relaxes, and the two supporting slide bars 4 drive the elastic telescopic rod 801 to move to the left. The telescopic end of the elastic telescopic rod 801 contacts the side wall of the extrusion sampling well, and the telescopic end of the elastic telescopic rod 801 is retracted. The hydraulic oil in the elastic telescopic rod 801 flows into the transmission hydraulic cylinder 803 through the first guide tube 802. The first guide tube 802 and the telescopic end of the transmission hydraulic cylinder 803 extend out and press the first friction block 804 on the support column 1 through the spring. The support column 1 and the sliding sleeve 2 are relatively fixed to prevent the sliding sleeve 2 from sliding during the sampling process of the device, resulting in a change in the sampling position of the device.

[0049] During the extension of the telescopic end of the second hydraulic cylinder 501, the hydraulic oil on the right side of the second hydraulic cylinder 501 flows into the corresponding double-headed hydraulic cylinder 805 through the corresponding second guide pipe 807. The two telescopic ends of the double-headed hydraulic cylinder 805 drive the corresponding two second friction blocks 806 to move away from each other. The second friction blocks 806 contact and squeeze the corresponding supporting slide bars 4. The mounting slide bar 5 is relatively fixed to the two supporting slide bars 4, which avoids the situation in which the sampling point of the device floats up and down due to unstable water flow during the sampling process of the device, so that the sewage sampling position remains unchanged during the sampling process of the device. When the telescopic end of the pressure cylinder 501 is reset, the related parts all return to their initial positions, the installation slide block 5 and the two supporting slide bars 4 are released from relative fixation, and at the same time, when the supporting slide bar 4 is reset, the telescopic end of the elastic telescopic rod 801 loses contact with the side wall of the sampling well, the telescopic end of the elastic telescopic rod 801 extends, and the telescopic end of the transmission hydraulic cylinder 803 drives the first friction block 804 to move and reset through the spring, and the support column 1 and the sliding sleeve 2 resume the state of free sliding against each other, and the above-mentioned related reset operations are repeated. After the parts in the device have returned to their initial positions, the device is cleaned and waits for the next use.

[0050] In addition, it should be understood that although the present specification is described in terms of implementation modes, not every implementation mode contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A multi-stage sampling device for municipal sewage, comprising a support column (1), characterized in that: The sliding sleeve (2) is also provided, wherein the sliding sleeve (2) is slidably connected to the lower part of the support column (1), and the sliding rods (3) distributed in a rectangular array are slidably connected to the side wall of the sliding sleeve (2), and the sliding rods (3) distributed in the rectangular array are jointly slidably connected to the mirror image support sliding rods (4), and the mirror image support sliding rods (4) are jointly slidably connected to evenly distributed installation sliding blocks (5), and tension springs are fixedly connected between two adjacent installation sliding blocks (5), and the installation sliding blocks (5) are provided with through holes, and the side of the installation sliding block (5) close to the sliding sleeve (2) is fixedly connected to a spring. A sampling cylinder (6) is connected to the through hole thereof, a one-way valve is provided at the connection point between the sampling cylinder (6) and the through hole corresponding to the mounting slide block (5), a piston straight rod (7) is slidably connected inside the sampling cylinder (6), a tension spring is fixedly connected between the sampling cylinder (6) and the corresponding piston straight rod (7), a discharge pipe is connected to the upper side of the sampling cylinder (6) through a valve, a rotating mechanism for controlling the orientation of the through holes of the evenly distributed mounting slide block (5) is provided on the upper side of the support column (1), and a retracting mechanism for controlling the movement and reset of the evenly distributed mounting slide block (5) is provided inside the support column (1); The lower sides of the mirror-image support slide bars (4) are both in an inclined state, so as to assist the slide sleeve (2) in locating the lowest point in the sewage pipe; The rotating mechanism comprises a support ring (201), the support ring (201) is rotatably connected to the upper side of the support column (1), a guide plate (202) is fixedly connected to the side wall of the sliding sleeve (2), a mirror-image inclined surface is provided on the guide plate (202), and a positioning component for locating the support column (1) in a sampling well is provided on the lower side of the support column (1); The positioning assembly comprises an extrusion cylinder (301), the extrusion cylinder (301) being fixedly connected to the lower side of the support column (1), a piston support rod (302) being slidably connected inside the extrusion cylinder (301), a tension spring being fixedly connected between the extrusion cylinder (301) and the piston support rod (302), a rotating ring (303) being rotatably connected to the lower side of the sliding sleeve (2), a tension spring being fixedly connected between the rotating ring (303) and the extrusion cylinder (301), and a first liquid guide being connected to the upper side of the extrusion cylinder (301). The support column (1) is provided with a first liquid storage cavity (306) in communication with the first liquid guide tube (304) at its upper portion, a fixing block (305) is fixedly connected to the side wall of the support column (1), the first liquid guide tube (304) penetrates the fixing block (305) and is fixedly connected thereto, and first hydraulic cylinders (307) distributed circumferentially and evenly are fixedly connected to the side wall of the support column (1), and the first hydraulic cylinders (307) distributed circumferentially and evenly are all in communication with the first liquid storage cavity (306); The telescopic end of the first hydraulic cylinder (307) is fixedly connected to an extrusion block, and a curved surface is provided on the side of the extrusion block on the telescopic end of the first hydraulic cylinder (307) close to the inner wall of the detection well, the curvature of the curved surface is the same as the curvature of the inner wall of the detection well, and is used to increase the contact area between the extrusion block on the telescopic end of the first hydraulic cylinder (307) and the inner wall of the detection well; The retractable mechanism comprises a pull rope (401), one end of the pull rope (401) is fixedly connected to the installation slider (5) on the side close to the extrusion cylinder (301), the pull rope (401) penetrates the rest of the installation slider (5), the support column (1) and the first liquid storage chamber (306), the sliding sleeve (2) is provided with a rectangular hole on the side close to the mirror image of the support slide rod (4), a spring is fixedly connected between the support slide rod (4) and the sliding sleeve (2), and the pull rope (401) passes through the sliding sleeve (2). The mounting slide block (5) on the side away from the extrusion cylinder (301) is connected to an air bag (402) via a fixing rope, the evenly distributed mounting slide blocks (5) are provided with a control component for controlling sampling, the mounting slide blocks (5) on the side away from the extrusion cylinder (301) are provided with an anti-blocking component for preventing impurities in sewage from blocking their through holes, and the middle part of the support column (1) is provided with a limiter component for assisting in positioning the sampling positions of the evenly distributed mounting slide blocks (5).

2. A multi-stage sampling device for municipal sewage according to claim 1, characterized in that: The control component comprises uniformly distributed second hydraulic cylinders (501), the uniformly distributed second hydraulic cylinders (501) are respectively fixedly connected to adjacent mounting slide blocks (5), the telescopic ends of the second hydraulic cylinders (501) are fixedly connected to a limit plate (502) slidably connected to the upper side of the adjacent sampling tube (6) through a tension spring, a limit inclined surface is arranged in the middle of the limit plate (502), the piston straight rod (7) is provided with a groove which cooperates with the limit inclined surface of the adjacent limit plate (502), one side of the uniformly distributed second hydraulic cylinders (501) is commonly connected to a second liquid guide tube (503), and one end of the second liquid guide tube (503) away from the uniformly distributed second hydraulic cylinders (501) is connected to a liquid storage bag (504).

3. A multi-stage sampling device for municipal sewage according to claim 2, characterized in that: The anti-blocking component comprises a guide filter plate (601), the guide filter plate (601) being fixedly connected to the mounting slide block (5) at a side away from the extrusion cylinder (301), fixed filter plates (602) being arranged at evenly distributed through holes of the mounting slide block (5), a filter cylinder (603) being slidably connected to an adjacent fixed filter plate (602) being fixedly connected to the through hole of the mounting slide block (5) at a side close to the extrusion cylinder (301), and a sampling filter plate (603) being arranged at a side close to the extrusion cylinder (301). A third hydraulic cylinder (604) is fixedly connected to the side wall of the cylinder (6), the telescopic end of the third hydraulic cylinder (604) is fixedly connected to the adjacent piston straight rod (7), the third hydraulic cylinder (604) is connected to a third liquid guide tube (605), and a fourth hydraulic cylinder (606) connected to the third liquid guide tube (605) is fixedly connected to the mounting slide block (5) on the side close to the extrusion cylinder (301), the telescopic end of the fourth hydraulic cylinder (606) is fixedly connected to the adjacent fixed filter plate (602).

4. A multi-stage sampling device for municipal sewage according to claim 3, characterized in that: The limit assembly comprises a sliding plate (701), the sliding plate (701) is slidably connected to the middle part of the support column (1), the sliding plate (701) penetrates the fixed block (305), a friction force is provided between the sliding plate (701) and the fixed block (305), the sliding plate (701) is provided with a mirror-image through hole, the mirror-image through holes of the sliding plate (701) are both connected and matched with the first liquid guide tube (304), a one-way valve is provided in the through hole on one side of the sliding plate (701), and a second liquid storage valve is provided in the middle part of the support column (1). The second liquid storage cavity (702) is slidably connected with a truncated cone block (703) and a connecting slider (704), the truncated cone block (703) and the sliding plate (701) are pressed together, a spring is fixedly connected between the truncated cone block (703) and the supporting column (1), the pull rope (401) penetrates the second liquid storage cavity (702), the truncated cone block (703) and the connecting slider (704), the pull rope (401) and the connecting slider (704) are fixedly connected, and the connecting slider (704) and the truncated cone block (703) are pressed together.

5. A multi-stage sampling device for municipal sewage according to claim 4, characterized in that: The invention also comprises a stabilizing mechanism, the stabilizing mechanism being arranged on the mirror image support slide bar (4), the stabilizing mechanism being used to lock the relative position of the mirror image support slide bar (4) and the evenly distributed mounting slide blocks (5), the stabilizing mechanism comprising an elastic telescopic rod (801), the elastic telescopic rod (801) being fixedly connected to the upper side of the mirror image support slide bar (4), the elastic telescopic rod (801) being connected to a first guide tube (802), the sliding sleeve (2) being fixedly connected to a transmission hydraulic cylinder (803) connected to the first guide tube (802), the transmission hydraulic cylinder (803) being The telescopic end is fixedly connected to a first friction block (804) slidably connected to the sliding sleeve (2) through a spring, the first friction block (804) is frictionally matched with the support column (1), and double-headed hydraulic cylinders (805) are fixedly connected to the evenly distributed mounting slide blocks (5), and the two telescopic ends of the double-headed hydraulic cylinder (805) are fixedly connected to a second friction block (806) that is extruded and matched with the adjacent supporting slide rod (4), and the middle part of the double-headed hydraulic cylinder (805) is connected to a second guide tube (807) that is connected to the adjacent second hydraulic cylinder (501) near the adjacent sampling tube (6).

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