CN116429209A

CN116429209A - Liquid level height measuring system for leachate pool

Info

Publication number: CN116429209A
Application number: CN202310458649.7A
Authority: CN
Inventors: 宁东阳; 陈绍敏; 胡代均; 刘雍; 姚进; 蒲佳杭; 赵阳; 赵红兵; 姚冰; 王康宁; 徐瑶; 胡耀文
Original assignee: Ohm (chongqing) Electronics Technology Ltd; Shanghai Haixi Industrial Communication Equipment Co ltd; Chongqing Electric Power College
Current assignee: Ohm (chongqing) Electronics Technology Ltd; Shanghai Haixi Industrial Communication Equipment Co ltd; Chongqing Electric Power College
Priority date: 2023-04-25
Filing date: 2023-04-25
Publication date: 2023-07-14

Abstract

The invention discloses a liquid level height measuring system of a leachate pool, which comprises a measuring device and a control device, wherein the measuring device comprises a telescopic measuring mechanism, a liquid level measuring instrument and a lifting mechanism; the telescopic measuring mechanism comprises a telescopic measuring cylinder and a filtering cover; the telescopic measuring cylinder is used for extending downwards into the leachate pool when measuring the liquid level height in the leachate pool, the filtering cover is used for filtering floating objects carried on the surface of the leachate, the liquid level measuring instrument is used for measuring the distance between the floating objects and the liquid level of the leachate, and measured distance data are sent to the control device; the control device obtains the liquid level height of the leachate according to the measured distance data and the distance between the liquid level measuring instrument and the bottom of the leachate pool; the invention can measure the real leachate liquid level without the influence of the floating pollutant height, and is provided with the control device in signal connection with the ultrasonic measuring instrument to control the liquid level at any time so as to avoid overflow of leachate, and the device has reasonable integral structure and convenient operation.

Description

Liquid level height measuring system for leachate pool

Technical Field

The invention relates to the field of liquid level measurement of leachate, in particular to a liquid level height measurement system of a leachate pool.

Background

Leachate, i.e. refuse, is produced in the course of stacking and landfilling, and under the influence of precipitation and groundwater seepage, a high concentration of organic or inorganic components is produced, which leachate is collected into a leachate bath, and the level of leachate is measured by the staff in order to better treat the leachate. In the prior art, a measuring head of a liquid level meter is usually directly placed into a liquid to be measured through a connecting wire or directly measured from the outside of the liquid level by using an ultrasonic liquid level meter. However, the connecting line may bend or swing to some extent, which may lead to inaccurate measurement results; the ultrasonic level meter directly measures from the liquid level and is possibly influenced by more floating dirt covered on the surface of the leachate pool, the dirt floats to have a certain thickness, and the ultrasonic level meter can measure the thickness of the dirt into the height of the leachate when measuring the liquid level, so that data deviating from an accurate value is obtained, a worker cannot grasp the actual height of the leachate level, namely, the leachate level in the leachate pool cannot be controlled within a proper range, and the leachate can overflow from the leachate pool.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to solve the technical problems that: the utility model provides a leachate pond liquid level height measurement system sets up ultrasonic measuring instrument, can follow the telescopic measuring cylinder of vertical direction downwardly extending and upwards shrink and with ultrasonic measuring instrument signal connection's controlling means mutually support and survey the liquid level height of leachate to be equipped with the filtration lid that is used for filtering the filth in the bottom of telescopic measuring cylinder, in order to avoid the filth to get into the measuring cylinder, set up simultaneously with telescopic measuring cylinder's use assorted fixing device and elevating system, make device overall structure more reasonable, convenient operation.

In order to solve the technical problems, the invention adopts a technical scheme that: the utility model provides a leachate liquid level height measurement system, including install in the measuring device of leachate pond top and with the controlling means of measuring device electricity connection, measuring device includes the flexible measuring mechanism who sets up in the leachate pond top, coaxial setting up in the liquid level measuring instrument of flexible measuring mechanism upper end and be used for driving flexible elevating system of flexible measuring mechanism along the vertical direction; the telescopic measuring mechanism comprises a telescopic measuring cylinder and a filtering cover arranged at the bottom of the telescopic measuring cylinder; the telescopic measuring cylinder is used for downwards extending into the leachate pool when measuring the liquid level height in the leachate pool, the filtering cover is used for filtering floating matters carried on the surface of the leachate when the telescopic measuring cylinder extends into the leachate pool, the liquid level measuring instrument is used for measuring the distance between the liquid level measuring cylinder and the liquid level of the leachate filtered by the filtering cover in the telescopic measuring cylinder, and the measured distance data are sent to the control device; and the control device obtains the liquid level height of the leachate according to the measured distance data and the distance between the liquid level measuring instrument and the bottom of the leachate pool.

Further, the liquid level measuring instrument is defined as an ultrasonic measuring instrument coaxially arranged at the upper end of the telescopic measuring tube, sound beam incident waves of the ultrasonic measuring instrument are emitted to the liquid level of the leachate in the filtering cover through the inner space of the telescopic measuring tube, the distance between the ultrasonic measuring instrument and the liquid level of the leachate is obtained through sound beam reflected waves generated after the sound beam incident waves and the sound beam incident waves contact the liquid level, and the obtained distance data are sent to the control device; the control device is used for obtaining the liquid level in the leaching liquid pool according to the distance data from the ultrasonic measuring instrument and the height from the ultrasonic measuring instrument to the bottom surface of the pool, which is obtained in advance.

Further, the telescopic measuring cylinder comprises a first section measuring cylinder, a middle measuring cylinder and a last section measuring cylinder which are sequentially arranged from top to bottom, the first section measuring cylinder is provided with an exhaust hole, the first section measuring cylinder is in sliding connection with the middle measuring cylinder, the middle measuring cylinder is in sliding connection with the last section measuring cylinder, and the filtering cover is arranged at the lower end of the last section measuring cylinder and provided with a filtering hole; the exhaust hole is used for balancing the air pressure in the telescopic measuring cylinder when the leachate enters the filtering cover, and the air pressure in the telescopic measuring cylinder is always consistent with the air pressure in the outside so that the liquid level in the telescopic measuring cylinder can be changed along with the lifting of the liquid level of the leachate pool, and the measuring result is more accurate and reliable; the filtering holes effectively shield dirt in the leachate and do not influence the ultrasonic measuring instrument to measure the liquid level.

Further, the ultrasonic measuring instrument is further used for measuring and obtaining the distance H between the ultrasonic measuring instrument and the bottom of the leachate pool before the leachate enters the leachate pool, and the liquid level height H in the leachate pool can be obtained according to the distance data between the ultrasonic measuring instrument and the liquid level, which is obtained by detection of the ultrasonic measuring instrument;

c, namely the propagation speed m/s of ultrasonic waves in the gas;

t-the time s of propagation of ultrasonic waves between the ultrasonic meter and the liquid level;

when the liquid level h of the leachate is obtained through the steps, the control device controls the sewage pump to stop or start to pump the leachate according to the upper limit and the lower limit of the liquid level of the leachate pool.

Further, the inner diameter of the cylindrical cavity of the end measuring cylinder is determined according to the sound beam angle and the measuring range of the ultrasonic measuring instrument, the high limit and the low limit of the monitored liquid level and the market plate staff gauge, and the radial size of the cylindrical cavity of the end measuring cylinder is reduced on the premise of meeting the measuring range;

wherein l represents the measuring range of the ultrasonic measuring instrument and is 0.450-15.000 m;

alpha represents the beam angle of the ultrasonic measuring instrument;

d represents the measured diameter of the ultrasonic wave under the constraint of the range and the beam angle.

Further, the lifting mechanism comprises a winch, two groups of traction ropes wound on the winch and a guiding mechanism used for guiding the two groups of traction ropes, one ends of the two groups of traction ropes are arranged on the winch, and the other ends of the two groups of traction ropes are connected with two opposite sides of the telescopic measuring cylinder after passing through the guiding mechanism.

Further, the guiding mechanism comprises a horizontal guiding mechanism for horizontally guiding the two groups of traction ropes, a vertical guiding mechanism for vertically guiding the two groups of traction ropes and a tensioning mechanism for tensioning the two groups of traction ropes, and the two groups of traction ropes sequentially penetrate through the horizontal guiding mechanism, the tensioning mechanism and the vertical guiding mechanism and then are connected with the telescopic measuring cylinder.

Further, the horizontal guiding mechanism is located between the winch and the telescopic measuring cylinder on the horizontal projection plane, the horizontal guiding mechanism comprises a left horizontal guiding component and a right horizontal guiding component which are symmetrically arranged left and right, the left horizontal guiding component and the right horizontal guiding component respectively comprise a first guiding wheel which is closer to the winch and a second guiding wheel which is closer to the telescopic measuring cylinder, and the two groups of traction ropes sequentially pass through the corresponding first guiding wheels and the second guiding wheels and then enter the vertical guiding mechanism.

Further, the horizontal guiding mechanism, the vertical guiding mechanism and the tensioning mechanism are all arranged on a guiding base, the guiding base comprises a middle support which is closer to the winch, a left support and a right support, wherein the left support and the right support are arranged at one end of the middle support which is closer to the telescopic measuring cylinder and are symmetrically arranged left and right, and the left support and the right support respectively comprise an inclined support, one end of which is connected with the middle support, the other end of which extends obliquely towards the direction of the telescopic measuring cylinder and towards the opposite direction, and a straight support, which is connected with the inclined support and is positioned at the outer side of the telescopic measuring cylinder; the first guide wheels are arranged on the middle support, the tensioning mechanism and the second guide wheels are arranged on the corresponding oblique support, and the vertical guide mechanism is arranged on the straight support.

Further, the vertical guiding mechanism is located on the horizontal projection plane at the left side and the right side of the telescopic measuring cylinder, and comprises a left vertical guiding component and a right vertical guiding component which are symmetrically arranged left and right, wherein the left vertical guiding component and the right vertical guiding component respectively comprise a fixing seat, a connecting rod horizontally arranged on the fixing seat and close to one side of the telescopic measuring cylinder, and a third guiding wheel which is arranged on the connecting rod and close to one end of the telescopic measuring cylinder and can vertically rotate.

The liquid level height measuring system of the leachate pool has at least the following beneficial effects: the device comprises an ultrasonic measuring instrument, a telescopic measuring cylinder capable of stretching downwards and shrinking upwards along the vertical direction and a filtering cover for filtering dirt, wherein the real leachate liquid level height is measured, the real leachate liquid level is not influenced by the height of floating dirt, a control device connected with the ultrasonic measuring instrument through signals is arranged to control the liquid level at any time, the leachate is prevented from overflowing, and a fixing device and a lifting mechanism which are matched with the telescopic measuring cylinder are arranged at the same time, so that the device is reasonable in integral structure and convenient to operate.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:

FIG. 1 is a schematic diagram of a system for measuring the height of a liquid level in a liquid-permeable pond according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the first measuring cylinder, the middle measuring cylinder, the last measuring cylinder and other structures of the liquid level height measuring system of the leachate pool;

FIG. 3 is a schematic diagram of the first measuring cylinder, the last measuring cylinder, the supporting frame and other structures of the liquid level height measuring system of the leachate pool;

FIG. 4 is a schematic view of the structure of the guide base, the winch, the left fixing seat and the like of the liquid level height measuring system of the leachate pool;

FIG. 5 is a schematic view of the left mounting base, left rotating plate, first adjusting bolt, etc. of the liquid level measuring system of the present invention;

FIG. 6 is a schematic view of the structure of the left rear bracket, the left first guide wheel and the annular groove of the liquid level height measuring system of the leachate pool;

FIG. 7 is a schematic view of the partial structure at A in FIG. 1;

FIG. 8 is a schematic view of the partial structure at B in FIG. 2;

FIG. 9 is a schematic view of the partial structure at C in FIG. 2;

FIG. 10 is a schematic view of the partial structure at D in FIG. 2;

FIG. 11 is a schematic view of the partial structure at E in FIG. 2;

FIG. 12 is a schematic view of the partial structure at F in FIG. 2;

FIG. 13 is a schematic view of the partial structure at G in FIG. 2;

FIG. 14 is a schematic view of the partial structure at H in FIG. 3;

FIG. 15 is a schematic view of the partial structure at I in FIG. 4;

FIG. 16 is a schematic view of the partial structure at J in FIG. 4;

FIG. 17 is a schematic diagram of the liquid level measurement of an ultrasonic tester of the system for measuring the liquid level of a leachate tank according to the present invention;

FIG. 18 is a schematic diagram of parameters of an ultrasonic tester of the system for measuring the liquid level of a percolate pool according to the present invention;

Fig. 19 is a schematic diagram confirming the diameter of the cylindrical cavity of the final measuring cylinder.

The meaning of the reference numerals in the drawings are:

the telescopic measuring mechanism 1, the filter cover 11, the upper circular ring 111, the conical cylinder 112, the hinge seat 113, the fixing piece 114, the limiting block 1141, the fixing screw 1142, the nut 1143, the filter hole 115, the head measuring cylinder 12, the air hole 121, the first outer edge 122, the first fixing part 123, the first fixing ring 1231, the first through cavity 1232, the middle measuring cylinder 13, the first middle measuring cylinder 131, the first cylindrical cavity 1311, the first inner edge 1312, the second outer edge 1313, the second fixing part 1314, the second middle measuring cylinder 132, the second cylindrical cavity 1321, the second inner edge 1322, the third outer edge 1323, the third fixing part 1324, the fourth fixing part 1325, the fourth fixing ring 1326, the fourth cavity 1327, the third middle measuring cylinder 133, the third cylindrical cavity 1331, the third inner edge 1332, the fourth outer edge 1333, the fifth fixing part 1334, the last measuring cylinder 14, the fourth cylindrical cavity 141, the fourth inner edge 142, the seventh fixing part 146, and the lower circular ring 144;

ultrasonic measuring instrument 2, clamping mechanism 3, support 31, first clamping assembly 32, first screw 321, first fixing clip 322, first handle 323, second screw 324, second fixing clip 325, second handle 326, second clamping assembly 33, third screw 331, third fixing clip 332, third handle 333, fourth screw 334, fourth fixing clip 335, fourth handle 336;

Lifting mechanism 4, hoist 41, traction rope 42, knot 421 and guide mechanism 43;

the horizontal guide mechanism 5, the upper-row guide roller 501, the lower-row guide roller 502, the support 503, the left first guide wheel 504, the left second guide wheel 505, the left rear bracket 506, the left front bracket 507, the annular groove 508, the right first guide wheel 509, the right second guide wheel 510, the right rear bracket 511 and the right front bracket 512;

the vertical guide mechanism 6, the left fixing seat 61, the left connecting rod 62, the left third guide wheel 63, the right fixing seat 64, the right connecting rod 65 and the right third guide wheel 66;

the tensioning mechanism 7, the left mounting seat 71, the left rotating plate 72, the left rotating block 73, the left fourth guide wheel 74, the left positioning piece 75, the first movable groove 751, the first limiting block 752, the first adjusting bolt 753, the first protruding block 7531, the first adjusting nut 754, the second movable groove 755, the second limiting block 756, the second adjusting bolt 757, the second protruding block 7571, the second adjusting nut 758, the right mounting seat 76, the right rotating block 77, the right fourth guide wheel 78 and the right positioning piece 79;

the guide base 8, the middle support 81, the left inclined support 82, the left straight support 83, the right inclined support 84 and the right straight support 85.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

As shown in fig. 1 to 19, the liquid level measuring system of the present invention is used for measuring the liquid level of the liquid seeping pool and controlling the liquid level to be within a reasonable range, and comprises a first platform installed above the liquid seeping pool, a second platform arranged above the first platform and connected with the first platform through a vertical ladder, a measuring device installed on the first platform and a control device electrically connected with the measuring device, wherein the measuring device comprises a telescopic measuring mechanism 1 arranged above the liquid seeping pool, a liquid level measuring instrument such as an ultrasonic measuring instrument 2 arranged at the upper end of the telescopic measuring mechanism 1 and coaxially arranged with the telescopic measuring mechanism, a clamping mechanism 3 arranged on the first platform and used for fixing the telescopic measuring mechanism 1, and a lifting mechanism 4 arranged on the second platform and used for driving the telescopic measuring mechanism 1 to stretch in a vertical direction, the first platform is provided with a through groove for the telescopic measuring mechanism to pass through, the lifting mechanism 4 comprises a winch 41, a set of traction ropes 42 arranged on the winch 41 and a set of traction ropes 42 arranged at two opposite ends of the traction mechanisms 42, and the traction ropes 43 are arranged at two opposite ends of the traction ropes 42.

The telescopic measuring mechanism 1 is used for extending downwards into the leachate pool when measuring the liquid level in the leachate pool, and comprises a telescopic measuring cylinder and a filtering cover 11 which is arranged at the bottom of the telescopic measuring cylinder and is used for filtering floating matters entrained in the leachate.

The telescopic measuring cylinder comprises a first section measuring cylinder 12, a middle measuring cylinder 13 and a last section measuring cylinder 14 which are sequentially sleeved in a sliding manner from top to bottom and from inside to outside, namely, the first section measuring cylinder 12 is in sliding connection with the middle measuring cylinder 13, and the middle measuring cylinder 13 is in sliding connection with the last section measuring cylinder 14. The first-section measuring cylinder 12, the middle measuring cylinder 13 and the last-section measuring cylinder 14 are hollow measuring cylinders provided with cylindrical cavities penetrating through the corresponding measuring cylinders along the length direction, and the diameters of the first-section measuring cylinder 12, the middle measuring cylinder 13 and the last-section measuring cylinder 14 are gradually arranged from small to large.

The first-stage measuring cylinder 12 includes a top wall and a side annular wall disposed around the lower end edge of the top wall, and the top wall is provided with a through hole for the sound velocity incident wave of the ultrasonic measuring instrument 2 to pass through, and the through hole may be defined as being disposed concentrically with the top wall. The top wall is provided with a fixing hole around the periphery of the through hole for fixing the ultrasonic measuring instrument 2, and the fixing hole can be defined as a screw hole, a riveting hole, a clamping hole and the like, so that the ultrasonic measuring instrument 2 can be detachably arranged on the top wall. The side annular wall is provided with a plurality of air holes 121 for balancing air pressure in the telescopic measuring cylinder, and the air holes 121 are circumferentially and uniformly distributed on the side annular wall at intervals by taking the center of the top wall as the center. It should be understood that the opening positions and the number of the air holes 121 are not limited to the above description, and in different embodiments, the air holes 121 may be set according to different requirements, so that they will not be described in detail herein. The lower end periphery of the side annular wall protrudes outwards to form a first outer edge 122 for enabling the head section measuring cylinder 12 and the middle measuring cylinder 13 which is close to the lower end of the head section measuring cylinder to slide in a sealing mode and not separate from each other, and the first outer edge 122 is used for blocking the upper end of the next middle measuring cylinder 13 to prevent the next middle measuring cylinder 13 from continuing to separate from the head section measuring cylinder 12 downwards. The inner peripheral wall of the side annular wall is provided with a first fixing part 123, and the first fixing part 123 is attached to the inner cavity wall of the cylindrical cavity at a position corresponding to the at least two groups of traction ropes 42. In the illustrated embodiment, the first fixing portion 123 is defined to include a first fixing ring 1231 disposed around the inner cavity wall of the cylindrical cavity, and at least two sets of first through cavities 1232 disposed on the first fixing ring 1231 at positions corresponding to the at least two sets of traction ropes 42, the first through cavities 1232 penetrating the first fixing ring 1231 along the length direction of the cylinder. It will be appreciated that the securing portion may in different embodiments also be defined as other structures, for example as at least two securing blocks provided on the inner cavity wall of the cylindrical cavity at a position corresponding to each traction rope 42, the through cavities being provided directly on the securing blocks.

The ultrasonic measuring instrument 2 is arranged on the top wall of the first section of measuring tube 12, and sound velocity incident wave of the ultrasonic measuring instrument is downwards injected into the telescopic measuring tube from the through hole to detect liquid level information of leachate filtered by the filtering cover 11 in the telescopic measuring tube, and the detected liquid level information is sent to the control device; the control device obtains the liquid level of the leachate according to the detected liquid level information and the distance between the ultrasonic measuring instrument 2 and the bottom of the leachate pool, and then controls a sewage pump connected with the sewage pump in a signal manner to adjust the liquid level of the leachate in the leachate pool.

In the embodiment shown, the intermediate measuring cylinders 13 are defined as a plurality of intermediate measuring cylinders 13 which are slidably sleeved together step by step. For convenience of description, an intermediate measuring cylinder 13 positioned at the uppermost end and sleeved with the first-stage measuring cylinder 12 is referred to herein as a first intermediate measuring cylinder 131, an intermediate measuring cylinder 13 positioned at the lowermost end and sleeved with the last-stage measuring cylinder 14 is referred to herein as a second intermediate measuring cylinder 132, and at least one intermediate measuring cylinder 13 positioned intermediate the first intermediate measuring cylinder 131 and the second intermediate measuring cylinder 132 is referred to generally as a third intermediate measuring cylinder 133.

The first middle measuring cylinder 131 has a first cylindrical cavity 1311 penetrating axially, a first inner edge 1312 in limit fit with the first outer edge 122 is formed at the upper end of the first cylindrical cavity 1311, the inner diameter of the first inner edge 1312 is larger than the outer diameter of the first section measuring cylinder 12, smaller than the outer diameter of the first outer edge 122, and smaller than the inner diameter of the first cylindrical cavity 1311, and the outer diameter of the first outer edge 122 is smaller than the inner diameter of the first cylindrical cavity 1311, namely, the outer diameter of the first section measuring cylinder 12 is smaller than the inner diameter of the first inner edge 1312, and the inner diameter of the first outer edge 122 is smaller than the inner diameter of the first cylindrical cavity 1311. When the first middle measuring cylinder 131 is assembled with the first middle measuring cylinder 12, the first middle measuring cylinder 12 can be arranged in the first cylindrical cavity 1311 in a penetrating way from bottom to top, the first middle measuring cylinder 12 is provided with a part penetrating out of the first inner edge 1312 upwards to be protruded upwards from the upper end of the first middle measuring cylinder 131, and the lower end and the first outer edge 122 of the first middle measuring cylinder 12 are limited in the first cylindrical cavity 1311 by the first inner edge 1312. When they are in the contracted state, the lower end of the head section measuring cylinder 12 is positioned at the lower end of the first intermediate measuring cylinder 131, and the upper end of the head section measuring cylinder 12 is protruded from the upper end of the first intermediate measuring cylinder 131; when they are in the extended state, the parts of the first section of the measuring cylinder 12 other than the first outer edge 122 are all exposed upwards to the upper end of the first intermediate measuring cylinder 131. The lower end periphery of the first middle measuring cylinder 131 is formed with a second outer edge 1313 for sealing and sliding connection of the first middle measuring cylinder 131 and the third middle measuring cylinder 133 located close to the lower end thereof up and down without mutual separation. A second fixing portion 1314 is provided on an inner peripheral wall of the first cylindrical cavity 1311.

The second middle measuring cylinder 132 has a second cylindrical cavity 1321 penetrating along the axial direction, a second inner edge 1322 in limit fit with the third middle measuring cylinder 133 is formed at the upper end of the second cylindrical cavity 1321, and the inner diameter of the second inner edge 1322 is larger than the outer diameter of the third middle measuring cylinder 133 at the upper end thereof and smaller than the inner diameter of the second cylindrical cavity 1321. The lower end periphery of the second middle measuring cylinder 132 protrudes outwards to form a third outer edge 1323 for enabling the second middle measuring cylinder 132 to slide with the final measuring cylinder 14 in a sealing manner and not separate from each other, and when the second middle measuring cylinder 132 is assembled with the final measuring cylinder 14, the third outer edge 1323 is used for blocking the upper end of the final measuring cylinder 14 so as to prevent the final measuring cylinder 14 from continuing to separate downwards from the second middle measuring cylinder 132. A third fixing portion 1324 is provided on an inner peripheral wall of the second cylindrical cavity 1321. The lower end of the outer circumference of the second middle measuring cylinder 132 is provided with a fourth fixing portion 1325, and the fourth fixing portion 1325 is attached to the outer wall of the second middle measuring cylinder 132 at a position corresponding to the at least two sets of traction ropes 42. In the illustrated embodiment, the fourth fixing portion 1325 is defined to include a fourth fixing ring 1326 looped around the outer wall of the second middle measuring cylinder 132 and at least two sets of fourth cavities 1327 provided opposite to the positions of the at least two sets of traction ropes 42, and the fourth cavities 1327 penetrate the fourth fixing ring 1326 along the length direction of the telescopic cylinder. It should be understood that the fixing portion may be defined in other configurations in different embodiments, for example, as at least two fixing blocks disposed on the outer wall of the second intermediate measuring cylinder 132 at positions corresponding to each traction rope 42, and the through cavities may be directly disposed on the fixing blocks.

The third middle measuring cylinders 133 each have a third cylindrical cavity 1331 penetrating in the axial direction, the upper ends of the third cylindrical cavities 1331 are each formed with a third inner edge 1332 in limit fit with a measuring cylinder located at the upper end of the third cylindrical cavities 1331, the inner diameter of the third inner edge 1332 is larger than the outer diameter of a measuring cylinder located at the upper end of the third inner edge 1332, smaller than the inner edge outer diameter of a measuring cylinder located at the upper end of the third inner edge 1332 and smaller than the inner diameter of the third cylindrical cavity 1331, and the outer diameter of the third inner edge 1332 of the third middle measuring cylinders 133 located at the upper end is smaller than the inner diameter of the third cylindrical cavity 1331 located at the lower end. When the third middle measuring cylinder 133 is assembled with a measuring cylinder at the upper end thereof, the upper end of the third middle measuring cylinder 133 can be arranged in the third cylindrical cavity 1331 in a penetrating manner from bottom to top, and a measuring cylinder at the upper end thereof is provided with a part penetrating upwards out of the third inner edge 1332 to be protruded upwards from the upper end of the third middle measuring cylinder 133, and the lower end of the upper end of the measuring cylinder and the outer edge of the measuring cylinder are limited in the third cylindrical cavity 1331 by the third inner edge 1332. When they are in the contracted state, the lower end of a measuring cylinder at the upper end thereof is positioned at the lower end of the third intermediate measuring cylinder 133, and the upper end of a measuring cylinder at the upper end thereof is protruded from the upper end of the third intermediate measuring cylinder 133; when they are in the extended state, the upper end of the third intermediate measuring cylinder 133 is exposed upward from the upper end of a measuring cylinder except for the outer edge thereof. The lower end of the third middle measuring cylinder 133 is outwardly protruded with a fourth outer edge 1333 for sealing and sliding connection between the third middle measuring cylinder 133 and a measuring cylinder located in close proximity to the lower end of the third middle measuring cylinder without mutual separation. A fifth fixing portion 1334 is provided on an inner peripheral wall of the third cylindrical cavity 1331.

The end measuring cylinder 14 has a fourth cylindrical cavity 141 penetrating along an axial direction thereof, an inner diameter of the fourth cylindrical cavity 141 is determined according to an acoustic beam angle, a measuring range, a high limit and a low limit of a monitored liquid level and a market plate scale of the ultrasonic measuring instrument 2, and a radial dimension of the fourth cylindrical cavity 141 is reduced on the premise of meeting a measuring range; the measured diameter D of the ultrasonic meter 2 can be calculated by the following equation:

alpha represents the beam angle of the ultrasonic measuring instrument 2;

as can be seen from the design conditions of the leachate pool in the embodiment, the upper limit and the lower limit of the detected liquid level are +178.00m to +184.00m; the liquid level fluctuation value between the two liquid level fluctuation values is 184.00m-178.00 m=6m; the range of the ultrasonic measuring instrument 2 is set to 10.00m <15.00m (the set value satisfies the range of 0.450m to 15.000 m) in consideration of the size of the immersed portion of the filter cover 11 and the increase in the long-term sewage treatment capacity;

d=2x10x0.04366=0.873m

Considering the surge effect of the leachate entering the leachate pool, the telescopic measuring tube is caused to swing to cause the sound beam wave to generate false reflection in the inner space of the telescopic measuring tube, and D is set to d=1m, that is, the diameter of the fourth cylindrical cavity 141 is greater than or equal to 1 m.

The upper end of the fourth cylindrical cavity 141 is formed with a fourth inner edge 142 in limit fit with the third outer edge 1323, the inner diameter of the fourth inner edge 142 is larger than the outer diameter of the second middle measuring cylinder 132, smaller than the outer diameter of the third outer edge 1323, and smaller than the inner diameter of the fourth cylindrical cavity 141, and the outer diameter of the third outer edge 1323 is smaller than the inner diameter of the fourth cylindrical cavity 141. When the end measuring cylinder 14 is assembled with the second intermediate measuring cylinder 132, the second intermediate measuring cylinder 132 may be inserted into the fourth cylindrical cavity 141 from bottom to top, and the second intermediate measuring cylinder 132 may have a portion that extends upward beyond the fourth inner edge 142 to protrude upward beyond the upper end of the end measuring cylinder 14, and the lower end of the second intermediate measuring cylinder 132 and the third outer edge 1323 may be limited in the fourth cylindrical cavity 141 by the fourth inner edge 142. The lower end of the second intermediate measuring cylinder 132 is positioned at the lower end of the final measuring cylinder 14 when they are in the contracted state, and the upper end of the second intermediate measuring cylinder 132 is protruded from the upper end of the final measuring cylinder 14; when they are in the extended state, the portions of the second intermediate measuring cylinder 132 other than the third outer edge 1323 are all exposed upward to the upper end of the final measuring cylinder 14. A sixth fixing portion 143 is provided on an inner peripheral wall of the fourth cylindrical cavity 141. A seventh fixing portion 144 is disposed on the periphery of the lower end of the end measuring cylinder 14. The lower end of the end measuring cylinder 14 protrudes downwards to form a cylinder 145, and a lower circular ring 146 on which the filter cover 11 is arranged at the lower end of the cylinder 145.

The structural arrangement and principle of the second fixing portion 1314, the third fixing portion 1324, the fifth fixing portion 1334, the sixth fixing portion 143 and the first fixing portion 123 are the same, and the structural arrangement and principle of the seventh fixing portion 144 and the fourth fixing portion 1325 are the same, so that they will not be repeated here.

The filtering cover 11 is configured to filter floating objects entrained on the surface of the leachate when the telescopic measuring cylinder stretches into the measuring leachate pool, and comprises an upper circular ring 111 and a conical cylinder 112 formed by downward protruding of the lower end of the upper circular ring 111, wherein the inner diameter and the outer diameter of the upper circular ring 111 are matched with those of the lower circular ring 146, and the cylinder 145, the lower circular ring 146, the upper circular ring 111 and the middle of the conical cylinder 112 are all communicated. A hinge seat 113 is commonly disposed between the corresponding positions of the upper ring 111 and the lower ring 146, and the other end of the upper ring 111 away from the hinge seat 113 is detachably connected with the lower ring 146 via a fixing member 114. The cone-shaped cylinder 112 is provided with a plurality of filtering holes 115 for filtering dirt in the leachate, the plurality of filtering holes 115 are uniformly distributed on the side wall of the cone-shaped cylinder 112 at intervals in a radial manner by taking the center of the lower circular ring 146 as the center, and the plurality of filtering holes 115 are distributed from dense to sparse along with the diameter of the cone-shaped cylinder 112 from small to large. It should be understood that the opening positions and the number of the filtering holes 115 are not limited to the above description, and in different embodiments, the filtering holes 115 may be set according to different requirements, so they are not described herein.

The fixing member 114 includes a limiting block 1141, a fixing screw 1142 disposed at an end of the limiting block 1141, and a nut 1143 screwed to an end of the fixing screw 1142. A jack penetrating through the upper ring 111 and the lower ring 146 is formed between the upper ring 111 and the lower ring 146, an inner diameter of the jack is matched with an outer diameter of the fixing screw 1142 for the fixing screw 1142 to penetrate therethrough, the fixing screw 1142 extends into one end of the jack and extends out of the other end of the jack, and the nut 1143 is screwed to a section of the fixing screw 1142 extending out of the jack.

The clamping mechanism 3 comprises a supporting frame 31 which is arranged at the upper end of the first platform and is positioned at the left and right sides of the telescopic measuring cylinder, and the two supporting frames 31 are oppositely arranged to form an installation space between the two supporting frames 31 for installing the clamping mechanism 3. The clamping mechanism 3 is installed in an installation space surrounded by the two supporting frames 31, the clamping mechanism 3 further comprises a first clamping component 32 for clamping the first section measuring cylinder 12 and a second clamping component 33 for clamping the last section measuring cylinder 14 in a contracted state, and the first clamping component 32 and the second clamping component 33 can move in opposite directions or move in opposite directions so as to respectively clamp and unclamp the first section measuring cylinder 12 and the last section measuring cylinder 14.

The first clamping components 32 are arranged at positions on the two supporting frames 31 corresponding to the salient sections of the head section measuring cylinder 12. The first clamping assembly 32 includes a first clamping member and a second clamping member respectively disposed on the two supporting frames 31, where the first clamping member and the second clamping member are disposed opposite left and right.

The first clamping member is disposed at an upper portion of the left support frame 31. The left side first screw hole has been seted up on support frame 31 upper portion, first holder include one with first screw hole size assorted and spiro union in first screw hole's first screw rod 321, rotation locate first screw rod 321 is close to first fixation clamp 322 of first section of measurement section of thick bamboo 12 one end and locate first screw rod 321 is kept away from first handle 323 of first section of thick bamboo 12 one end, first fixation clamp 322 is located the left side the right side of support frame 31, first handle 323 is located the left side of support frame 31. The second clamping member is disposed at the upper portion of the right supporting frame 31. The right side the second screw hole has been seted up on support frame 31 upper portion, the second holder include one with first screw hole size assorted and spiro union in first screw hole's second screw 324, locate second screw 324 is close to second fixation clamp 325 of first section measuring cylinder 12 one end and locate second screw 324 is kept away from second handle 326 of first section measuring cylinder 12 one end, second fixation clamp 325 is located the right side the left side of support frame 31, second handle 326 is located the right side of support frame 31. In the illustrated embodiment, the first fixing clip 322 and the second fixing clip 325 are both in a transverse V shape and are disposed opposite to each other, and the size of the openings of the first fixing clip 322 and the second fixing clip 325 is matched with the radian of the side annular wall of the head section measuring cylinder 12.

The second clamping assemblies 33 are arranged at positions on the two supporting frames 31 corresponding to the end section measuring cylinders 14, the second clamping assemblies 33 comprise a third clamping piece and a fourth clamping piece which are respectively arranged on the two supporting frames 31, and the third clamping piece and the fourth clamping piece are oppositely arranged left and right.

The third clamping member is disposed at the lower portion of the left support frame 31. The left side the third screw hole has been seted up to support frame 31 lower part, the third holder include one with third screw hole size assorted and spiro union in the third screw hole's third screw 331, rotate locate third screw 331 is close to the third fixation clamp 332 of last section of measurement section of thick bamboo 14 one end and locate third screw 331 is kept away from the third handle 333 of last section of thick bamboo 14 one end, third fixation clamp 332 is located the left side the right side of support frame 31, third handle 333 is located the left side of support frame 31. The fourth clamping member is disposed at the lower portion of the right supporting frame 31. The right side the fourth screw hole has been seted up to support frame 31 lower part, the fourth holder include one with fourth screw hole size assorted and spiro union in fourth screw hole in fourth screw 334, rotate locate fourth screw 334 is close to fourth fixation clamp 335 of last section of thick bamboo 14 one end and locate fourth screw 334 is kept away from fourth handle 336 of last section of thick bamboo 14 one end, fourth fixation clamp 335 is located the right side the left side of support frame 31, fourth handle 336 is located the right side of support frame 31. In the illustrated embodiment, the third fixing clip 332 and the fourth fixing clip 335 are both in a transverse V shape and have openings opposite to each other, and the size of the openings of the third fixing clip 332 and the fourth fixing clip 335 is matched with the size of the outer portion Zhou Hudu of the end measuring cylinder 14.

The guiding mechanism 43 is disposed at the upper end of the second platform through a guiding base 8, the guiding base 8 is disposed on the upper end face of the second platform and is located at the front side of the winding machine 41, the central axis of the winding machine 41 is collinear with the central axis of the guiding base 8, the guiding base 8 comprises a middle support 81 close to the winding machine 41, a left support and a right support, the middle support 81 is close to one end of the telescopic measuring cylinder and symmetrically disposed with the central axis L of the telescopic measuring cylinder as a symmetry axis, and the diameter of the end measuring cylinder 14 is smaller than the distance between the left support and the right support, so that the distance between two groups of traction ropes 42 passing through the guiding mechanism 43 can be matched with the diameter of the end measuring cylinder 14.

The left side support includes a left side oblique support 82 and a left side straight support 83, the plane of overlooking of left side oblique support 82 is a parallelogram that the upper and lower both sides are horizontal, left and right sides are from top to bottom to low slope, the rear end face of left side oblique support 82 with the left half of the preceding terminal surface of middle support 81 is connected, left side straight support 83 be a vertical set up in rectangular seat on the platform, left side straight support 83 rear end with left side oblique support 82 is connected. The right support comprises a right inclined support 84 and a right straight support 85, the top view of the right inclined support 84 is a parallelogram with two horizontal sides from top to bottom and two inclined sides from left to right from top to bottom, the rear end face of the right inclined support 84 is connected with the right half part of the front end face of the middle support 81, the right straight support 85 is a rectangular seat longitudinally arranged on the platform, and the rear end of the right straight support 85 is connected with the right inclined support 84.

The guiding mechanism 43 is arranged on the guiding base 8, and comprises a horizontal guiding mechanism 5 for horizontally guiding two groups of traction ropes 42, a vertical guiding mechanism 6 for vertically guiding the two groups of traction ropes 42 and a tensioning mechanism 7 for tensioning the two groups of traction ropes 42, wherein the two groups of traction ropes 42 sequentially penetrate through the horizontal guiding mechanism 5, the tensioning mechanism 7 and the vertical guiding mechanism 6 after extending out of the winch 41, and are connected with the telescopic measuring cylinder.

The horizontal guiding mechanism 5 is located between the winch 41 and the telescopic measuring cylinder on the horizontal projection plane, and comprises a left horizontal guiding component and a right horizontal guiding component which are symmetrically arranged left and right by taking the central axis L as a symmetry axis, and a guiding roller component for guiding the two groups of traction ropes 42 to the corresponding horizontal guiding components, wherein the guiding roller component is located at the front side of the winch 41 and located at the rear side of the left horizontal guiding component and the right horizontal guiding component.

The guide roller assembly is disposed on the middle support 81, and includes an upper guide roller 501 and a lower guide roller 502 disposed in a vertical direction, and two supports 503 for mounting the upper guide roller 501 and the lower guide roller 502. The two support frames 31 are symmetrically arranged left and right by taking the central axis L as a symmetry axis, the upper guide roller 501 and the lower guide roller 502 are arranged at the middle positions of the two supports 503 arranged from the left side and the right side, the two ends of the upper guide roller 501 and the lower guide roller 502 are respectively and rotatably connected with the two opposite sides of the supports 503, and the rotation directions of the upper guide roller 501 and the lower guide roller 502 are opposite and are in friction fit with two groups of traction ropes 42 to pass through.

The left horizontal guiding assembly comprises a left first guiding wheel 504 which is closer to the winch 41, a left second guiding wheel 505 which is closer to the telescopic measuring cylinder, and a left rear bracket 506 and a left front bracket 507 for installing the left first guiding wheel 504 and the left second guiding wheel 505. The left rear support 506 is disposed on the middle support 81 and located at the front side of the guiding roller assembly and located at the position where the upper guiding roller 501 and the lower guiding roller 502 are close to the left, the left first guiding wheel 504 is rotationally disposed at the upper end of the left rear support 506, the left front support 507 is disposed at the upper end of the left oblique support 82 and is matched with the penetrating position reserved by the telescopic measuring cylinder for the hauling rope 42, the left second guiding wheel 505 is rotationally disposed at the upper end of the left front support 507, the middle parts of the upper and lower surfaces of the left first guiding wheel 504 and the left second guiding wheel 505 are respectively provided with an annular groove 508 with a circumference and a side communicated with the outside so that the corresponding hauling rope 42 penetrates through the annular grooves, and the heights of the left first guiding wheel 504 and the left second guiding wheel 505 are matched with the penetrating position reserved by the telescopic measuring cylinder for the hauling rope 42, the contact surfaces of the upper guiding roller and the lower guiding roller 502 are flush with the left first guiding wheel 504, and the left second guiding wheel 505 enter the left guiding mechanism 6 in turn in a horizontal and vertical state.

The right horizontal guide assembly includes a right first guide wheel 509 closer to the hoist 41 and a right second guide wheel 510 closer to the telescopic measuring tube, and a right rear bracket 511 and a right front bracket 512 for mounting the right first guide wheel 509 and the right second guide wheel 510. The right rear side bracket 511 is arranged on the middle support 82 and is positioned at the front side of the guide roller assembly and at the position where the upper guide roller 501 and the lower guide roller 502 are close to the right, the right first guide wheel 509 is rotatably arranged at the upper end of the right rear side bracket 511, the right front side bracket 512 is arranged at the upper end of the right inclined support 84 and is matched with the penetrating position reserved by the telescopic measuring cylinder for the haulage rope 42, the right second guide wheel 510 is rotatably arranged at the upper end of the right front side bracket 512, and the heights of the right first guide wheel 509 and the right second guide wheel 510 are all flush with the contact surfaces of the upper guide roller 501 and the lower guide roller 502 so as to facilitate the haulage rope 42 to sequentially pass through the guide roller assembly, the right first guide wheel 509 and the right second guide wheel 510 in a horizontal state and then enter the vertical guide mechanism 6.

The distance between the left first guiding wheel 504 and the right first guiding wheel 509 is matched with the distance between the two groups of hauling ropes 42 on the winch 41, and the distance between the left second guiding wheel 505 and the right second guiding wheel 510 is matched with the outer diameter of the end measuring cylinder 14.

The vertical guiding mechanism 6 comprises a left vertical guiding component and a right vertical guiding component which are symmetrically arranged left and right by taking the central axis L as a symmetry axis, and the two groups of traction ropes 42 are respectively connected with the telescopic measuring cylinder after passing through the left vertical guiding component and the right vertical guiding component. The left vertical guiding component is arranged in the middle of the left straight support 83, and comprises a left fixing seat 61, a left connecting rod 62 horizontally arranged on the left fixing seat 61 and close to one side of the telescopic measuring tube, and a left third guiding wheel 63 rotatably arranged on the left connecting rod 62 and close to one end of the telescopic measuring tube and capable of rotating vertically, the rotation axis of the left third guiding wheel 63 is collinear with the center of the telescopic measuring tube, and the left traction rope 42 changes direction from horizontal direction to vertical direction after passing through the left third guiding wheel 63 and then is connected with the telescopic measuring tube. The right vertical guiding component is arranged in the middle of the right straight support 85, and comprises a right fixing seat 64, a right connecting rod 65 horizontally arranged on the right fixing seat 64 and close to one side of the telescopic measuring tube, and a right third guiding wheel 66 rotatably arranged on the right connecting rod 65 and close to one end of the telescopic measuring tube and capable of rotating vertically, the rotation axis of the right third guiding wheel 66 is collinear with the center of the telescopic measuring tube, and the direction of the traction rope 42 on the right is changed from the horizontal direction to the vertical direction after passing through the right third guiding wheel 66, and then the traction rope is connected with the telescopic measuring tube.

The tensioning mechanism 7 comprises a left tensioning assembly and a right tensioning assembly which are symmetrically arranged left and right by taking the central axis L as a symmetry axis. The left tensioning mechanism is arranged on the left inclined support 82 and located between the left first guide wheel 504 and the left second guide wheel 505, and comprises a left mounting seat 71, a left rotating plate 72 arranged on the upper portion of the left mounting seat 71 and capable of horizontally rotating around the axis of the left mounting seat, a left rotating block 73 arranged on the upper end of the left rotating plate 72, left fourth guide wheels 74 horizontally rotating on the two ends of the left rotating block 73, and a left positioning piece 75 for positioning the left rotating plate 72. The left mounting seat 71 is a rectangle with oblique installation and left and right sides parallel to the left and right side walls of the left oblique support 82, the left rotating plate 72 is disposed on a diagonal line between the leftmost corner and the rightmost corner of the left mounting seat 71, the left rotating block 73 is a shuttle-shaped and is disposed on the upper portion of the left rotating block 73 along the length direction of the left rotating plate 72, the center of the left rotating block is coincident with the center of the left rotating block 73, and the two left fourth guide wheels 74 are respectively and horizontally rotated on the two end corners of the left rotating block 73, and the height of the left fourth guide wheels is equal to the height of the left first guide wheels 504 so as to facilitate the traction rope 42 to horizontally pass through the left rotating block.

The left positioning member 75 includes a first positioning member corresponding to the left fourth guide wheel 74 positioned to the left and a second positioning member corresponding to the right fourth guide wheel 74. The first positioning member includes a first movable groove 751 formed in the left rotating plate 72 and corresponding to the left fourth guiding wheel 74, a first limiting block 752 formed on the right front side of the left fourth guiding wheel 74, a first adjusting bolt 753 formed on the first limiting block 752, and a first adjusting nut 754 rotatably formed in the notch of the first movable groove 751 and screwed with the first adjusting bolt 753. The first limiting block 752 is provided with a first slot which is obliquely distributed inside the first limiting block 752 and the extension line passes through the center of the corresponding left fourth guide wheel 74, the first adjusting nut 754 is rotationally arranged on the notch of the first slot far away from one end of the left rotating plate 72, the first adjusting bolt 753 penetrates from one end of the first slot and then penetrates from the other end, one end of the first adjusting bolt 753 close to the left rotating plate 72 stretches into the first movable groove 751 and penetrates through the first movable groove 751 to be fixedly provided with a first protruding block 7531 so as to prevent the first adjusting bolt 753 from being disconnected with the first movable groove 751, and the other end of the first adjusting bolt 753 stretches out of the first movable groove 751 and is in threaded connection with the first adjusting nut 754.

The second positioning member includes a second movable groove 755 formed on the left rotating plate 72 and corresponding to the right left fourth guiding wheel 74, a second limiting block 756 formed on the left rear side of the left fourth guiding wheel 74, a second adjusting bolt 757 formed on the second limiting block 756, and a second adjusting nut 758 rotatably formed in the notch of the second movable groove 755 and screwed with the second adjusting bolt 757. The second limiting block 756 is provided with a second slot which is obliquely distributed inside the second limiting block 756 and the extension line passes through the center of the corresponding left fourth guiding wheel 74, the second adjusting nut 758 is rotatably arranged on the notch of the second slot away from one end of the left rotating plate 72, the second adjusting bolt 757 penetrates from one end of the second slot to the other end of the second slot, one end of the second adjusting bolt 757, which is close to the left rotating plate 72, extends into the second movable groove 755 and penetrates through the second movable groove 755 to be fixedly provided with a second protruding block 7571 so as to prevent the second adjusting bolt 757 from being disconnected with the second movable groove 755, and the second adjusting bolt 757 extends out of the other end of the second movable groove 755 to be in threaded connection with the second adjusting nut 758.

The right tensioning mechanism 7 is disposed on the right inclined support 84 and located between the right first guide wheel 509 and the right second guide wheel 510, and comprises a right mounting seat 76, a right rotating plate disposed on the upper portion of the right mounting seat 76 and capable of horizontally rotating around the axis of the right mounting seat, a right rotating block 77 disposed on the upper end of the right rotating plate, right fourth guide wheels 78 horizontally rotating on the two ends of the right rotating block 77, and a right positioning member 79 for positioning the right rotating plate. The right mounting seat 76 is a rectangle with obliquely arranged top view and left and right sides parallel to the left and right side walls of the right oblique support 84, the right rotating plate is arranged on a diagonal line between the rightmost corner and the leftmost corner of the right mounting seat 76, the right rotating block 77 is a shuttle-shaped and is arranged on the upper part of the right rotating block 77 along the length direction of the right rotating plate, the center of the right rotating block is coincident with the center of the right rotating block 77, and the two right fourth guide wheels 78 are respectively and horizontally rotated on the two end corners of the right rotating block 77 and are equal to the right first guide wheels 509 in height so as to facilitate the traction rope 42 to horizontally pass through the traction rope.

The right positioning member 79 includes a third positioning member corresponding to the right fourth guiding wheel 78 located at the right side and a fourth positioning member corresponding to the right fourth guiding wheel 78 located at the left side, and principles and structures of the third positioning member and the first positioning member, and principles and structures of the fourth positioning member and the second positioning member are the same, so that they will not be repeated here.

The right first guiding wheel 509, the right second guiding wheel 510, the left third guiding wheel 63, the right third guiding wheel 66, the left fourth guiding wheel 74 and the right fourth guiding wheel 78 are provided with annular grooves 508 having the same structure as the left first guiding wheel 504 and the left second guiding wheel 505, so that the traction rope 42 can be threaded therethrough and limited by the traction rope 42.

One embodiment of the system for measuring the liquid level of a leachate pool according to the invention works as follows: the two groups of traction ropes 42 extend from the hoist 41, the left traction rope 42 passes through the middle of the upper row of guide rollers 501 and the lower row of guide rollers 502, and then sequentially passes through the left first guide wheel 504, the two left fourth guide wheels 74 and the left second guide wheel 505, and at this time, the left traction rope 42 extends horizontally and forwards from back to front. Then the left traction rope 42 passes through the left third guide wheel 63 and then is changed from horizontal to vertical; the traction rope 42 on the right side passes through the middle of the upper row of guide rollers 501 and the lower row of guide rollers 502, and then sequentially passes through the first right guide wheel 509, the two fourth right guide wheels 78 and the second right guide wheel 510, and at this time, the traction rope 42 on the right side extends horizontally and forwards from back to front. The traction rope 42 on the right side is changed from horizontal to vertical after passing through the third guide wheel 66 on the right side; the left hauling rope 42 and the right hauling rope 42 sequentially pass through the fourth fixing portion 1325 and the seventh fixing portion 144 from top to bottom, then bend upwards at the lower end of the outer side of the final-segment measuring cylinder 14, and then sequentially pass through the sixth fixing portion 143, the third fixing portion 1324, the fifth fixing portion 1334, the second fixing portion 1314 and the first fixing portion 123 from bottom to top, and then form a knot 421 at the upper end of the first fixing ring 1231.

Under the unused state, the haulage rope 42 is packed up by hoist 41, the telescopic measuring tube is in the shrink state under the pulling of haulage rope 42, at this moment first festival measuring tube 12 middle measuring tube and last festival measuring tube 14 cup joint from inside to outside layer by layer, at this moment first clamping piece with the second clamping piece all folds to the intermediate direction and will first festival measuring tube 12 centre gripping is fixed, the third clamping piece with the fourth clamping piece also folds to the intermediate direction will last festival measuring tube 14 centre gripping is fixed.

When it is desired to measure the level of the leachate bath, the clamping of the final measuring cylinder 14 is first released. The third handle 333 is rotated to drive the third screw 331 to rotate, so that the third screw 331 moves in the direction away from the distal measuring cylinder 14 relative to the left side of the supporting frame 31 in the third threaded hole, and drives the third fixing clip 332 to move away from the distal measuring cylinder 14. The fourth handle 336 is rotated to drive the fourth screw 334 to rotate, so that the fourth screw 334 can move in the direction away from the end measuring cylinder 14 relative to the right side of the supporting frame 31 in the fourth threaded hole, and the fourth fixing clip 335 is driven to move away from the end measuring cylinder 14. This releases the second clamp assembly 33 from the clamp on the stub measuring cylinder 14.

At this time, the winch 41 is started to pay out the traction rope 42, the telescopic measuring tube gradually stretches along with the extension of the traction rope 42, and the upper ends of the middle measuring tube 13 and the tail measuring tube 14 are limited at the lower ends of the upper section measuring tube respectively.

When the filtering cover 11 extends into the leachate, the leachate sewage enters the telescopic measuring tube from the inside of the leachate pool through the conical tube 112, and the telescopic measuring tube forms an atmospheric communicating tube under the effect of balancing air resistance because the side annular wall of the first measuring tube 12 is provided with a plurality of air holes 121. Because the cone 112 is provided with the plurality of filtering holes 115, when the leachate enters the telescopic measuring cylinder, the dirt floating cover layer is isolated outside the telescopic measuring cylinder by the cone 112, so that the telescopic measuring cylinder is effectively shielded. The liquid level of the leachate can fluctuate along with the insertion of the telescopic measuring cylinder, but the fluctuation of the liquid level can be restrained by the interaction between the internal friction force of the sewage and the balance air resistance, so that the liquid level in the telescopic measuring cylinder can change along with the lifting change of the liquid level of the leachate pool, the relative stability of the liquid level can be maintained, and the follow-up liquid level measurement of the liquid level by workers is facilitated.

When the lower portion of the filtering cover 11 contacts the bottom of the leachate tank, the measurement of the liquid level of the leachate tank can be started. Starting the ultrasonic measuring instrument 2, injecting an acoustic beam incident wave of the ultrasonic measuring instrument 2 into the inner space of the telescopic measuring tube from the through hole, generating reflection after the acoustic beam incident wave contacts the liquid level downwards, injecting the acoustic beam incident wave back to the ultrasonic measuring instrument 2 upwards, obtaining the time t of the transmitting and reflecting process by the ultrasonic measuring instrument 2 and sending the data to the control device, wherein the propagation speed of ultrasonic waves in gas is a known parameter c, then the distance between the ultrasonic measuring instrument 2 and the liquid level is x,

the distance H from the ultrasonic measuring instrument 2 to the bottom of the leachate tank can be measured and obtained by the same method before the leachate is introduced into the leachate tank, and the liquid level of the leachate tank can be obtained

After the liquid level is obtained by the control device, the sewage pump connected with the control device in a signal manner can be controlled to adjust the liquid level of the leachate in the leachate pool so as not to overflow from the leachate pool.

When the device is used for a period of time, the cone 112 may bind with a lot of dirt, which may clog the filter holes 115, affecting the normal use of the device, and thus requiring cleaning in time. When cleaning is needed, the power equipment is started to wind up the traction rope 42, so that the telescopic measuring cylinder is contracted to an initial state, and the whole telescopic measuring cylinder is not positioned in the leachate pool any more. The second clamping assembly 33 is operated in the reverse direction to the step of releasing the clamping of the final-segment measuring cylinder 14, so that the third clamping piece and the fourth clamping piece are folded towards the direction of the final-segment measuring cylinder 14 to clamp and fix the final-segment measuring cylinder 14.

At this time, the nut 1143 is turned to unscrew from the end of the fixed screw 1142, and then the stopper 1141 is held to draw the fixed screw 1142 out of the insertion hole, at this time, the fixing state of the fixing member 114 to the conical cylinder 112 is released, the conical cylinder 112 is rotated and opened with the hinge point of the hinge seat 113 as the center of a circle, and the dirt on the surface of the conical cylinder 112 is cleaned by the high-pressure water gun. After cleaning, the cone 112 is reversed and returned to its original position according to the procedure described above.

Since the telescopic measuring cylinder has a certain weight, as the service life of the hauling cable 42 increases, the hauling cable 42 may deform in the length direction, which may cause contact between the hauling cable 42 and the guiding wheel to have insufficient friction force, which affects the stability of the up-and-down movement of the telescopic measuring cylinder, and the hauling cable 42 needs to be tensioned by the tensioning mechanism 7.

When the left traction rope 42 needs to be tensioned, the left rotating plate 72 is firstly shifted to a position where the corresponding traction rope 42 can be tensioned, then the first adjusting nut 754 is rotated to drive the first adjusting bolt 753 to move in the first slot, the first protruding block 7531 is driven to move to be matched with the first movable slot 751 to fix the left rotating plate 72 from the lower end, the second adjusting nut 758 is rotated to drive the second adjusting bolt 757 to move in the second slot, and the second protruding block 7571 is driven to move to be matched with the second movable slot 755 to fix the left rotating plate 72 from the upper end. When the traction rope 42 on the left side needs to be tensioned, the third positioning member and the fourth positioning member are operated in the same steps as the above operation of the first positioning member and the second positioning member, and the traction rope 42 on the right side is tensioned.

Compared with the prior art, the liquid level height measuring system of the leachate pool is provided with the ultrasonic measuring instrument, the telescopic measuring cylinder capable of stretching downwards and shrinking upwards along the vertical direction and the filtering cover for filtering dirt, so that the real liquid level height of the leachate which is not influenced by the height of floating dirt is measured, the control device connected with the ultrasonic measuring instrument through signals is arranged to control the liquid level at any time so as to avoid overflow of the leachate, and meanwhile, the fixing device and the lifting mechanism matched with the telescopic measuring cylinder are arranged, so that the whole structure of the device is more reasonable and convenient to operate.

Claims

1. A system for measuring the liquid level of a leachate pool, which is characterized in that: the device comprises a measuring device arranged above a leachate pool and a control device electrically connected with the measuring device, wherein the measuring device comprises a telescopic measuring mechanism arranged above the leachate pool, a liquid level measuring instrument coaxially arranged at the upper end of the telescopic measuring mechanism and a lifting mechanism for driving the telescopic measuring mechanism to stretch along the vertical direction; the telescopic measuring mechanism comprises a telescopic measuring cylinder and a filtering cover arranged at the bottom of the telescopic measuring cylinder; the telescopic measuring cylinder is used for downwards extending into the leachate pool when measuring the liquid level height in the leachate pool, the filtering cover is used for filtering floating matters carried on the surface of the leachate when the telescopic measuring cylinder extends into the leachate pool, the liquid level measuring instrument is used for measuring the distance between the liquid level measuring cylinder and the liquid level of the leachate filtered by the filtering cover in the telescopic measuring cylinder, and the measured distance data are sent to the control device; and the control device obtains the liquid level height of the leachate according to the measured distance data and the distance between the liquid level measuring instrument and the bottom of the leachate pool.

2. The leachate pond level height measurement system of claim 1, wherein: the liquid level measuring instrument is defined as an ultrasonic measuring instrument coaxially arranged at the upper end of the telescopic measuring tube, sound beam incident waves of the ultrasonic measuring instrument are emitted to the liquid level of the leachate in the filtering cover through the inner space of the telescopic measuring tube, the distance between the ultrasonic measuring instrument and the liquid level of the leachate is obtained through sound beam reflected waves generated after the sound beam incident waves and the sound beam incident waves contact the liquid level, and the obtained distance data are sent to the control device; the control device is used for obtaining the liquid level in the leaching liquid pool according to the distance data from the ultrasonic measuring instrument and the height from the ultrasonic measuring instrument to the bottom surface of the pool, which is obtained in advance.

3. The leachate pond level height measurement system of claim 2, wherein: the telescopic measuring cylinder comprises a first section measuring cylinder, a middle measuring cylinder and a last section measuring cylinder which are sequentially arranged from top to bottom, the first section measuring cylinder is provided with an exhaust hole, the first section measuring cylinder is in sliding connection with the middle measuring cylinder, the middle measuring cylinder is in sliding connection with the last section measuring cylinder, and the filtering cover is arranged at the lower end of the last section measuring cylinder and provided with a filtering hole; the exhaust hole is used for balancing the air pressure in the telescopic measuring cylinder when the leachate enters the filtering cover, and the air pressure in the telescopic measuring cylinder is always consistent with the air pressure in the outside so that the liquid level in the telescopic measuring cylinder can be changed along with the lifting of the liquid level of the leachate pool, and the measuring result is more accurate and reliable; the filtering holes effectively shield dirt in the leachate and do not influence the ultrasonic measuring instrument to measure the liquid level.

4. The leachate pond level height measurement system of claim 2, wherein: the ultrasonic measuring instrument is also used for measuring the distance H between the ultrasonic measuring instrument and the bottom of the leachate pool before the leachate enters the leachate pool, and the liquid level height H in the leachate pool can be obtained according to the distance data between the ultrasonic measuring instrument and the liquid level, which is obtained by detection of the ultrasonic measuring instrument;

c, namely the propagation speed m/s of ultrasonic waves in the gas;

5. A leachate pond level height measurement system as claimed in claim 3 wherein: the inner diameter of the cylindrical cavity of the end measuring cylinder is determined according to the sound beam angle, the measuring range, the upper limit and the lower limit of the monitored liquid level and the scale of the market plate of the ultrasonic measuring instrument, and the radial size of the cylindrical cavity of the end measuring cylinder is reduced on the premise of meeting the measuring range;

Alpha represents the beam angle of the ultrasonic measuring instrument;

6. The leachate pond level height measurement system of claim 1, wherein: the lifting mechanism comprises a winch, two groups of traction ropes wound on the winch and a guiding mechanism used for guiding the two groups of traction ropes, one ends of the two groups of traction ropes are arranged on the winch, and the other ends of the two groups of traction ropes are connected with two opposite sides of the telescopic measuring cylinder after passing through the guiding mechanism.

7. The leachate pond level height measurement system of claim 6, wherein: the guiding mechanism comprises a horizontal guiding mechanism for horizontally guiding the two groups of traction ropes, a vertical guiding mechanism for vertically guiding the two groups of traction ropes and a tensioning mechanism for tensioning the two groups of traction ropes, wherein the two groups of traction ropes sequentially penetrate through the horizontal guiding mechanism, the tensioning mechanism and the vertical guiding mechanism and then are connected with the telescopic measuring cylinder.

8. The leachate pond level height measurement system of claim 7, wherein: the horizontal guiding mechanism is located between the winch and the telescopic measuring cylinder on the horizontal projection plane and comprises a left horizontal guiding component and a right horizontal guiding component which are symmetrically arranged left and right, the left horizontal guiding component and the right horizontal guiding component respectively comprise a first guiding wheel which is closer to the winch and a second guiding wheel which is closer to the telescopic measuring cylinder, and the two groups of traction ropes sequentially pass through the corresponding first guiding wheels and the second guiding wheels and then enter the vertical guiding mechanism.

9. The leachate pond level height measurement system of claim 8, wherein: the horizontal guide mechanism, the vertical guide mechanism and the tensioning mechanism are all arranged on a guide base, the guide base comprises a middle support which is closer to the winch, a left support and a right support, wherein the left support and the right support are arranged at one end of the middle support which is closer to the telescopic measuring cylinder and are symmetrically arranged left and right, and the left support and the right support respectively comprise an inclined support, one end of which is connected with the middle support, the other end of which extends obliquely towards the direction of the telescopic measuring cylinder and is opposite to the direction, and a straight support, which is connected with the inclined support and is positioned at the outer side of the telescopic measuring cylinder; the first guide wheels are arranged on the middle support, the tensioning mechanism and the second guide wheels are arranged on the corresponding oblique support, and the vertical guide mechanism is arranged on the straight support.

10. The leachate pond level height measurement system of claim 9, wherein: the vertical guide mechanism is located on the horizontal projection plane on the left side and the right side of the telescopic measuring cylinder, and comprises a left vertical guide component and a right vertical guide component which are symmetrically arranged left and right, wherein the left vertical guide component and the right vertical guide component all comprise a fixing seat, a connecting rod which is horizontally arranged on the fixing seat and is close to one side of the telescopic measuring cylinder, and a third guide wheel which is arranged on the connecting rod and is close to one end of the telescopic measuring cylinder and can vertically rotate.