CN112095473B - Double-guide-beam bridge girder erection machine turning method - Google Patents

Double-guide-beam bridge girder erection machine turning method Download PDF

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Publication number
CN112095473B
CN112095473B CN202010948315.4A CN202010948315A CN112095473B CN 112095473 B CN112095473 B CN 112095473B CN 202010948315 A CN202010948315 A CN 202010948315A CN 112095473 B CN112095473 B CN 112095473B
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supporting leg
auxiliary
leg
bridge girder
erection machine
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CN112095473A (en
Inventor
姚笛
黄丰
孙家林
汪嘉伟
罗晓兵
廖昭
郗永磊
郑瑜
刘昌义
熊伟
付少华
周平
唐积
陈贤俊
郑强
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CCCC Second Harbor Engineering Co
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CCCC Second Harbor Engineering Co
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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01DCONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D21/00Methods or apparatus specially adapted for erecting or assembling bridges

Abstract

The invention discloses a method for turning a double-guide-beam bridge girder erection machine, which comprises the following steps: s1: arranging an auxiliary middle supporting leg at the bottom of the main beam between the front supporting leg and the middle supporting leg; s2: the front supporting leg, the auxiliary middle supporting leg and the rear supporting leg lift up and raise the bridge girder erection machine, so that the middle supporting leg is emptied and the middle supporting leg is heightened; s3: retracting and emptying the front supporting leg to enable the auxiliary middle supporting leg, the rear supporting leg and the middle supporting leg to support a bridge girder erection machine; s4: disassembling the front supporting leg, hoisting the front supporting leg to the rear part of the rear supporting leg through the hoisting crown block, and mounting the front supporting leg on the lower part of the main beam; s5: and disassembling the front auxiliary supporting leg and hoisting the front auxiliary supporting leg to the rear end of a bridge girder erection machine through the hoisting crown block, and installing the front auxiliary supporting leg on the lower part of the main girder. The invention does not need other auxiliary equipment such as a crane and the like, realizes the in-situ turning of the bridge girder erection machine, comprehensively improves the turning work efficiency, and can be widely applied to the technical field of bridge girder erection machine operation.

Description

Double-guide-beam bridge girder erection machine turning method
Technical Field
The invention relates to the technical field of bridge girder erection machine operation. More particularly, the invention relates to a method for turning a double-guide beam bridge erecting machine.
Background
The bridge girder erection machine is applied to the construction of the upper structures of a plurality of bridges, and a bridge girder is a widely used structural form, and the bridge girder erection machine mainly comprises the following components: the foundation, the pier, the precast beam and the bridge floor are respectively arranged from bottom to top. The bridge girder erection machine is key equipment in the construction process, has the function of hoisting a poured precast beam to a specified installation position on an abutment, and needs to turn around for many times due to complex erection line and variable erection direction.
At present, a turning method mainly adopted by bridge girder erection machines at home and abroad in erection construction and the defects exist:
1. the method for dismantling the bridge girder erection machine and reinstalling has large requirements on the field, complex operation, large-scale hoisting equipment, high cost, long time consumption for retrying evidence and the like;
2. the original rotary turning method has the advantages of large requirement on site, complex operation, low work efficiency and long time consumption by utilizing the clearance between the support leg transverse moving system of the bridge girder erection machine and the track and the clearance between the support leg and the anti-rolling wheel group of the main girder;
3. the main truss of the bridge girder erection machine is supported by the support frame, the support legs of the bridge girder erection machine are released, the exchange of the front and middle support legs, the front and rear guide beams and the like is realized, and finally the turning method has higher requirements on sites, needs the assistance of hoisting equipment, has lower work efficiency and consumes longer time;
therefore, the bridge girder erection machine needs to be properly modified and a turning method needs to be innovated, so that the influence factors of a field, hoisting equipment and the like during turning of the bridge girder erection machine are solved, the turning work efficiency of the bridge girder erection machine is improved, and the construction period is saved.
Disclosure of Invention
The invention provides a method for turning a double-guide-beam bridge girder erection machine, wherein a front crane and a rear crane are arranged at the upper part of a main girder of the bridge girder erection machine, and a front auxiliary supporting leg, a front supporting leg, a middle supporting leg and a rear supporting leg are sequentially arranged at the lower part of the main girder, and the method is characterized by comprising the following steps of:
s1: arranging an auxiliary middle supporting leg at the bottom of the main beam between the front supporting leg and the middle supporting leg;
s2: the front supporting leg, the auxiliary middle supporting leg and the rear supporting leg lift up and raise the bridge girder erection machine, so that the middle supporting leg is emptied and the middle supporting leg is heightened;
s3: retracting and emptying the front supporting leg to enable the auxiliary middle supporting leg, the rear supporting leg and the middle supporting leg to support a bridge girder erection machine;
s4: disassembling the front supporting leg, hoisting the front supporting leg to the rear part of the rear supporting leg through the hoisting crown block, and mounting the front supporting leg on the lower part of the main beam;
s5: and disassembling the front auxiliary supporting leg and hoisting the front auxiliary supporting leg to the rear end of a bridge girder erection machine through the hoisting crown block, and installing the front auxiliary supporting leg on the lower part of the main girder.
Preferably, the auxiliary center leg is the same size and structure as the rear leg.
Preferably, the front supporting leg, the auxiliary middle supporting leg and the rear supporting leg are provided with telescopic sleeve columns and jacking oil cylinders, and the jacking oil cylinders are used for jacking the telescopic sleeve columns to control the telescopic length.
Preferably, the telescopic sleeve column comprises a column core and a column sleeve, a plurality of pin shaft holes are formed in the lower portion of the column core and are arranged in a double-row mode in the vertical direction, and the column core and the column sleeve are locked through a pin shaft.
Preferably, the middle supporting leg is of a segmented structure with an upper section and a lower section, and further comprises a heightening section, wherein the heightening section is detachably connected with the upper section and the lower section of the middle supporting leg respectively through bolts.
Preferably, the upper surfaces of all connecting surfaces between the heightening section and the upper section and the lower section of the middle supporting leg are provided with concentric annular grooves, the lower surfaces of the heightening section and the lower section of the middle supporting leg are provided with concentric annular bulges, and the concentric annular grooves are matched with the concentric annular bulges.
Preferably, the main beam comprises two rows of trusses with the same structure and a pair of upper cross beams, the pair of upper cross beams are symmetrically arranged between the ends of the two rows of trusses, and the two rows of trusses are assembled into a whole.
Preferably, the front guide beam and the rear guide beam which are the same in structure are arranged at two ends of the main beam respectively, and connectors of the front auxiliary supporting legs are arranged below the front guide beam and the rear guide beam.
Preferably, the step S4 includes the steps of:
a1: a front hoisting crown block moves above the front supporting leg, and a rear hoisting crown block moves above the space between the middle supporting leg and the rear supporting leg;
a2: retracting and emptying the front supporting leg, detaching the front supporting leg from the main beam, hoisting the front supporting leg by using the front hoisting crown block and rotating the front supporting leg by 90 degrees;
a3: the front hoisting crown block is used for placing the front supporting leg on the bridge surface between the auxiliary middle supporting leg and the middle supporting leg, and then the front hoisting crown block is moved to the position above the auxiliary middle supporting leg;
a4: the rear hoisting crown block moves to the position above the front supporting leg and lifts the front supporting leg to be conveyed to the rear part of the rear supporting leg, and the front supporting leg rotates for 90 degrees and is then installed below the main beam.
Preferably, a U-shaped horizontal observation instrument is arranged below the middle part of the main beam, liquid with the volume ratio of 2/3 is filled in the U-shaped horizontal observation instrument, colored particle floating objects are arranged on the liquid level, a separation filter screen is arranged in a pipeline at the bottom of the U-shaped horizontal observation instrument, and pipelines at two sides of the U-shaped horizontal observation instrument are provided with liquid level scale marks.
The invention at least comprises the following beneficial effects:
1. the turning method has simple steps, is convenient to realize, consumes short time and is convenient to construct, because the auxiliary middle supporting leg and the auxiliary rear supporting leg have the same structure, the functions can be mutually replaced, when the bridge girder erection machine is turned, only the front supporting leg and the front auxiliary supporting leg of the bridge girder erection machine are required to be hoisted to the rear end of the bridge girder erection machine, the steps of dismounting and replacing the rear supporting leg are omitted, and the turning efficiency of the bridge girder erection machine is improved;
2. practical value is high and economic benefits is good, because the front and back nose girder structure is the same, and the symmetry sets up in the girder both ends, saves the transposition step of nose girder around among the bridge crane tune process, has eliminated the large-scale structure hoist and mount and the installation potential safety hazard that exist when equipment is disassembled.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic diagram of a double-guide bridge erecting machine before turning around;
FIG. 2 is a schematic diagram of a double-guide bridge erecting machine according to the present invention after turning around;
FIG. 3 is a schematic view of the front leg of the present invention;
FIG. 4 is a schematic view of the auxiliary middle leg structure according to the present invention;
FIG. 5 is a schematic view of a middle leg structure according to the present invention;
FIG. 6 is a schematic view of the rear leg structure of the present invention;
FIG. 7 is a schematic view of a level according to the present invention;
FIG. 8 is a top view of the raised section joint face of the present invention;
FIG. 9 is a schematic view of the lower surface of the raised section joint surface according to the present invention;
description of reference numerals:
1. the main beam, 2, front supporting leg, 3, auxiliary middle supporting leg, 4, middle supporting leg, 5, rear supporting leg, 6, front auxiliary supporting leg, 7, front crane, 8, rear crane, 9, front guide beam, 10, rear guide beam, 11, column core, 12, column sleeve, 13, lifting oil cylinder, 14, pin shaft hole, 15, heightening section, 16, gradienter, 17, concentric annular groove, 18, bolt, 19, concentric annular bulge, 20, middle supporting leg upper section, 21, middle supporting leg lower section, 22, liquid level scale mark, 23, color particle floater, 24 and separation filter screen.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
In the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1 and fig. 2, the invention provides a method for turning a double-guide bridge girder erection machine, comprising the following steps:
s1: arranging an auxiliary middle supporting leg 3 at the bottom of the main beam 1 between the front supporting leg 2 and the middle supporting leg 4;
s2: the front supporting legs 2, the auxiliary middle supporting legs 3 and the rear supporting legs 5 lift up and raise the bridge girder erection machine, so that the middle supporting legs 4 are emptied and the middle supporting legs 4 are heightened;
s3: retracting and emptying the front support leg 2, so that the auxiliary middle support leg 3, the rear support leg 5 and the middle support leg 4 support a bridge girder erection machine;
s4: disassembling the front support leg 2, hoisting the front support leg 2 to the rear of the rear support leg 5 through the hoisting crown block, and installing the front support leg 2 at the lower part of the main beam 1;
s5: disassembling the front auxiliary supporting leg 6, hoisting the front auxiliary supporting leg 6 to the rear end of a bridge girder erection machine through the hoisting crown block, and installing the front auxiliary supporting leg 6 at the lower part of the main girder 1;
the auxiliary middle supporting leg 3 and the rear supporting leg 5 are identical in size and structure.
In the above technical solution, in step S1, the structure of the auxiliary middle support leg 3 added to the bridge girder erection machine is completely the same as that of the rear support leg 5, and the functions can be interchanged after the bridge girder erection machine is turned around, so as to avoid exchanging the rear support leg 5 and improve the turning efficiency of the bridge girder erection machine; in the step S3, the bridge girder erection machine is supported by the rear support leg 5, the middle support leg 4 and the auxiliary middle support leg 3, so that the problem of the overall stability of the structure of the bridge girder erection machine when the front support leg 2 is replaced is solved; in steps S4 to S5, the front outrigger 2 and the front auxiliary outrigger 6 are hoisted by using the hoisting crown block of the bridge girder erection machine itself, and other hoisting equipment is not needed, thereby saving the construction cost.
As shown in fig. 3, 4 and 6, in another technical scheme, the front support leg 2, the auxiliary middle support leg 3 and the rear support leg 5 are respectively provided with a telescopic sleeve column and a jacking cylinder 13, and the jacking cylinder 13 is used for jacking the telescopic sleeve column to control the telescopic length. The telescopic sleeve column comprises a column core 11 and a column sleeve 12, a plurality of pin shaft holes 14 are formed in the lower portion of the column core 11, the pin shaft holes 14 are arranged in a double-row mode in the vertical direction, and the column core 11 and the column sleeve 12 are locked through a pin shaft.
In the technical scheme, the telescopic sleeve column is limited and locked through the pin shaft hole 14, and the telescopic length of the telescopic sleeve column is accurately controlled.
As shown in fig. 5, 8 and 9, in another technical solution, the center leg is a segmented structure with an upper section and a lower section, and the center leg further includes a heightening section 15, and the heightening section 15 is detachably connected to the upper section 20 and the lower section 21 of the center leg respectively through bolts 18. The upper surfaces of all connecting surfaces between the heightening sections 15 and the upper section 20 and the lower section 21 of the middle supporting leg are provided with concentric annular grooves 17, the lower surfaces of all connecting surfaces are provided with concentric annular bulges 19, and the concentric annular grooves 17 are matched with the concentric annular bulges 19.
In the above technical solution, the concentric annular groove 17 and the concentric annular protrusion 19 on the connecting surface increase the contact area of the connecting surface, and further improve the stability of the sectional structure of the middle leg 4.
In another technical scheme, a front guide beam 9 and a rear guide beam 10 with the same structure are respectively arranged at two ends of the main beam 1, and interfaces of the front auxiliary supporting legs 6 are respectively arranged below the front guide beam 9 and the rear guide beam 10.
In the technical scheme, the front and rear guide beams 10 and the main beam 1 of the bridge girder erection machine are designed in an equal strength symmetry mode, so that the problems that the rigidity of the front guide beam 9 turned back to form the rear guide beam 10 is insufficient and the requirement of feeding the tail part of the bridge girder erection machine cannot be met are solved; the front guide beam 9 and the rear guide beam 10 of the bridge girder erection machine are both provided with the connecting positions of the front auxiliary supporting legs 6, so that the front guide beam 10 and the rear guide beam 10 do not need to be replaced during turning construction, and the bridge girder erection machine is convenient and quick.
In another technical solution, the step S4 includes the following steps:
a1: a front crane 7 moves above the front leg 2 and a rear crane 8 moves above between the middle leg 4 and the rear leg 5;
a2: retracting and emptying the front support leg 2, detaching the front support leg 2 from the main beam 1, hoisting the front support leg 2 by using the front hoisting crown block 7 and rotating for 90 degrees;
a3: the front crane carriage 7 suspends the front leg 2 on the bridge deck between the auxiliary middle leg 3 and the middle leg 4, and then the front crane carriage 7 moves above the auxiliary middle leg 3;
a4: the back jack-up overhead traveling crane 8 moves to preceding landing leg 2 top and will preceding landing leg 2 is hoisted and is transported to back landing leg 5 rear, preceding landing leg 2 gyration 90 degrees, then install under girder 1.
In the above technical solution, in step a1, the front crane crown block 7 and the rear crane crown block 8 are moved to specific positions to trim the bridge girder erection machine, so as to improve stability and prepare for the hoisting and replacing of the front leg 2; in the step A2, the front supporting leg 2 rotates 90 degrees to change from a transverse posture to a longitudinal posture so as to conveniently stride other supporting legs in the lifting process of the front supporting leg 2; in the step A3 and the step a4, the front crane crown block 7 and the rear crane crown block 8 hoist the front support leg 2 in a relay manner, so that the problem that the front support leg 2 hoisting process stability is influenced because the bridge girder erection machine cannot be balanced when the front crane crown block 7 hoists the front support leg 2 alone is avoided.
As shown in fig. 7, a U-shaped horizontal observation instrument 16 is arranged below the middle part of the main beam 1, liquid with a volume ratio of 2/3 is filled in the U-shaped horizontal observation instrument 16, a colored particle floating object 23 is arranged on the liquid level, a separation filter screen 24 is arranged in a pipeline at the bottom of the U-shaped horizontal observation instrument, and liquid level scale marks 22 are arranged on pipelines at two sides of the U-shaped horizontal observation instrument.
In the technical scheme, the jacking height of each supporting leg in the step S2 is adjusted according to the height difference of the liquid level scale marks 22 by reading the liquid level scale marks 22 of the colored particle floats 23 on the two sides, so that the main beam 1 is ensured to be always in a horizontal state, the main beam 1 is effectively supported in the jacking process of each supporting leg, and the stability of the main beam 1 in the jacking process is improved; the color particle floating objects 23 are distinguished by colors, so that liquid level scales can be read by naked eyes conveniently; the separation filter screen 24 is used for separating the color particle floaters 23 at two sides of the U-shaped pipe, so that the color particle floaters 23 are prevented from being mixed and concentrated to the same side.
The first embodiment is as follows:
the method for turning the bridge girder erection machine with the double guide girders comprises the following steps:
the method comprises the following steps: erecting a beam plate with a frame of 40m, installing an auxiliary middle supporting leg 3 between a front supporting leg 2 and a middle supporting leg 4, and preparing to turn around;
step two: removing bolts below 1m heightened joints of the middle supporting legs 4, jacking the front supporting legs 2, the auxiliary middle supporting legs 3 and the rear supporting legs 5, and enabling the main beam 1 to rise by 50 cm;
step three: a middle supporting leg 4 is added with a height section of 44cm and is moved forwards to a position which is about 30m away from the auxiliary middle supporting leg 3 to support and bear force;
step four: the rear supporting leg 5 moves forwards to a position close to the middle supporting leg 4 and 5m to support and bear force;
step five, the front crane crown block 7 moves to the position above the front supporting leg 2, and the rear crane crown block 8 moves to the position above the balancing bridge girder erection machine between the middle supporting leg 4 and the rear supporting leg 5;
step six, the front supporting legs 2 are contracted and disassembled from the main beam 1, and the front lifting crown block 7 lifts the front supporting legs 2 and rotates for 90 degrees;
seventhly, the front hoisting crown block 7 carries the front support leg 2 to move to the midspan position of the middle support leg 4 and the auxiliary middle support leg 3, the front support leg 2 is placed on the bridge floor, and then the front hoisting crown block 7 moves to the position above the auxiliary middle support leg 3;
step eight, the front supporting legs 2 are lifted by the rear hoisting crown block 8 and hoisted to the rear of the rear supporting legs 5, and then the front supporting legs 2 are rotated by 90 degrees and installed at the lower parts of the main beams 1;
step nine, repeating the steps six to eight, dismantling the front auxiliary supporting legs 6, and lifting the front auxiliary supporting legs to the rear end of the main beam 1 for installation;
step ten, the middle supporting leg 4 is disassembled from 1m of heightened section and moved to the rear of the auxiliary middle supporting leg 3 to support and bear force, the auxiliary middle supporting leg 3 replaces the original function of the rear supporting leg 5, the rear supporting leg 5 replaces the original function of the auxiliary middle supporting leg 3, and the turning of the bridge girder erection machine is completed.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.

Claims (9)

1. The utility model provides a two-guide beam bridging machine turn around method, the girder upper portion of bridging machine is equipped with preceding crane and back crane, and the lower part of girder sets gradually preceding auxiliary leg, preceding landing leg, well landing leg, back landing leg, its characterized in that includes following steps:
s1: arranging an auxiliary middle supporting leg at the bottom of the main beam between the front supporting leg and the middle supporting leg;
s2: the front supporting leg, the auxiliary middle supporting leg and the rear supporting leg lift up and raise the bridge girder erection machine, so that the middle supporting leg is emptied and the middle supporting leg is heightened;
s3: retracting and emptying the front supporting leg to enable the auxiliary middle supporting leg, the rear supporting leg and the middle supporting leg to support a bridge girder erection machine;
s4: disassembling the front supporting leg, hoisting the front supporting leg to the rear part of the rear supporting leg through a hoisting crown block, and mounting the front supporting leg on the lower part of the main beam;
s5: the front auxiliary supporting leg is disassembled and hoisted to the rear end of the bridge girder erection machine through a hoisting crown block, and the front auxiliary supporting leg is installed on the lower part of the main girder;
the auxiliary middle supporting leg and the auxiliary rear supporting leg are identical in size and structure, the auxiliary middle supporting leg replaces the original function of the rear supporting leg, and the auxiliary middle supporting leg replaces the function of the rear supporting leg.
2. The method of claim 1, wherein the front support leg, the auxiliary middle support leg and the rear support leg are provided with a telescopic sleeve column and a jacking cylinder, and the jacking cylinder is used for jacking the telescopic sleeve column to control the telescopic length.
3. The method for turning around a double-guide bridge girder erection machine according to claim 2, wherein said telescopic sleeve column comprises a column core and a column sleeve, a plurality of pin shaft holes are arranged at the lower part of said column core, the pin shaft holes are arranged in a double row along the vertical direction, and said column core and said column sleeve are locked by a pin shaft.
4. The method for turning around a double-guide bridge girder erection machine according to claim 1, wherein the middle supporting leg is of a segmented structure with an upper section and a lower section, and the middle supporting leg further comprises heightening joints which are detachably connected with the upper section and the lower section of the middle supporting leg respectively through bolts.
5. The method as claimed in claim 4, wherein the upper surface of all the connecting surfaces between the heightening section and the upper and lower sections of the middle leg is provided with a concentric annular groove, the lower surface is provided with a concentric annular protrusion, and the concentric annular groove and the concentric annular protrusion are engaged.
6. The method of claim 1, wherein the main girder comprises two rows of trusses having the same structure and a pair of upper cross beams symmetrically disposed between the two rows of truss ends, and the two rows of trusses are assembled together.
7. The method for turning around a double-guide-beam bridge erecting machine according to claim 1, wherein a front guide beam and a rear guide beam which are identical in structure are respectively arranged at two ends of the main beam, and connectors of front auxiliary support legs are arranged below the front guide beam and the rear guide beam.
8. The method for turning around a double-guide bridge girder erection machine according to claim 1, wherein said step S4 comprises the steps of:
a1: a front hoisting crown block moves above the front supporting leg, and a rear hoisting crown block moves above the space between the middle supporting leg and the rear supporting leg;
a2: retracting and emptying the front supporting leg, detaching the front supporting leg from the main beam, hoisting the front supporting leg by using the front hoisting crown block and rotating the front supporting leg by 90 degrees;
a3: the front hoisting crown block is used for placing the front supporting leg on the bridge surface between the auxiliary middle supporting leg and the middle supporting leg, and then the front hoisting crown block is moved to the position above the auxiliary middle supporting leg;
a4: the rear hoisting crown block moves to the position above the front supporting leg and lifts the front supporting leg to be conveyed to the rear part of the rear supporting leg, and the front supporting leg rotates for 90 degrees and is then installed below the main beam.
9. The method for turning around the double-guide-beam bridge crane according to claim 1, wherein a U-shaped horizontal observation instrument is arranged below the middle part of the main beam, liquid with the volume ratio of 2/3 is filled in the U-shaped horizontal observation instrument, a colored particle floating object is arranged on the liquid level, a separation filter screen is arranged in a pipeline at the bottom of the U-shaped horizontal observation instrument, and liquid level scale marks are arranged on pipelines at two sides of the U-shaped horizontal observation instrument.
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