CN215411081U - Underground closed conduit measuring equipment - Google Patents

Underground closed conduit measuring equipment Download PDF

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Publication number
CN215411081U
CN215411081U CN202122101344.XU CN202122101344U CN215411081U CN 215411081 U CN215411081 U CN 215411081U CN 202122101344 U CN202122101344 U CN 202122101344U CN 215411081 U CN215411081 U CN 215411081U
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China
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gear
fixedly connected
sealing member
cavity
aperture
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CN202122101344.XU
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Chinese (zh)
Inventor
周冬红
崔志勇
赵紫微
马金英
张楠
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Baoding Water Resources And Hydropower Survey And Design Institute
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Baoding Water Resources And Hydropower Survey And Design Institute
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Abstract

The application relates to underground underdrain measuring equipment which comprises a total station body and a base, wherein the base comprises a sponge sucker, an angle adjusting assembly and a connecting assembly, the sponge sucker comprises a sealing piece, independent valve body, the installation body, the accumulator, vacuum generator fixes the intercommunication has aspirating hole and air outlet valve, the air vent has been seted up on the installation body, set up a plurality of aperture cavitys in the independent valve body, the aperture cavity is close to sealing member one end and is cylindrically, the aperture cavity is kept away from sealing member one end and is the round platform type, the aperture cavity is close to sealing member one end area and is greater than and keeps away from sealing member one end area, aperture cavity bottom medial surface fixedly connected with annular limiting plate, be provided with the steel ball in the aperture cavity, the steel ball diameter is greater than the diameter that sealing member one end was kept away from to the aperture cavity, the steel ball diameter is less than the diameter that the aperture cavity is close to sealing member one end and is greater than the limiting plate internal diameter. This application has not only can be fixed in ground with the total powerstation body, can also be fixed in its advantage on wall, roof.

Description

Underground closed conduit measuring equipment
Technical Field
The application relates to the technical field of underdrain measuring devices, in particular to underground underdrain measuring equipment.
Background
The construction of aboveground buildings, underground tunnels and the like all needs precise engineering measurement. Wherein a total station is a common measuring device. The total station, i.e. the total station type electronic distance measuring instrument, is a high-tech measuring instrument integrating light, machine and electricity into one body, and is a surveying instrument integrating horizontal angle, vertical angle, distance (slant distance and flat distance) and height difference measuring functions into one body. The total station comprises a total station body and a base, wherein the total station body is often matched with a tripod base to be used together in the using process. However, the applicant has found that the tripod base can only be placed on the ground for use when constructing an underground underdrain, which is inconvenient to operate.
SUMMERY OF THE UTILITY MODEL
In order to make the total powerstation body can be fixed in on ground, roof, the wall to convenient to use, this application provides an underground underdrain measuring equipment, adopts following technical scheme:
an underground closed conduit measuring device comprises a total station body and a base, wherein the base comprises a sponge sucker, an angle adjusting component fixedly connected with the sponge sucker and a connecting component arranged between the angle adjusting component and the total station body, the sponge sucker comprises a sealing element, an independent valve body fixedly connected with the sealing element, an installation body fixedly connected with one end of the independent valve body far away from the sealing element, an energy accumulator fixedly installed on the installation body and a vacuum generator fixedly installed on the installation body, the vacuum generator is fixedly communicated with an air suction hole and an air outlet valve, the installation body is provided with an air vent communicated with the air suction hole, a plurality of aperture cavities are arranged in the independent valve body, one end of the aperture cavity close to the sealing element is cylindrical, one end of the aperture cavity far away from the sealing element is in a circular truncated cone shape, and the area of one end of the aperture cavity close to the sealing element is larger than the area of one end far away from the sealing element, the inner side surface of the bottom end of the aperture cavity is fixedly connected with a limiting plate, the limiting plate is annular, a steel ball is arranged in the aperture cavity, the diameter of the steel ball is larger than the diameter of the end, far away from the sealing element, of the aperture cavity, the diameter of the steel ball is smaller than the diameter of the end, close to the sealing element, of the aperture cavity, and the diameter of the steel ball is larger than the inner diameter of the limiting plate.
Through adopting the above-mentioned technical scheme, the position of sealing member and wall in close contact with, through vacuum generator, make in the independent valve body that corresponds be in vacuum state, and there is the clearance in the sealing member one end is kept away from with the aperture cavity to steel ball in the independent valve body, make the air current pass through the aperture cavity, and then make in the aperture cavity, all be in negative pressure state between sealing member and the wall, thereby adsorb on the wall, if porous on the wall, to the point that sealing member and wall can not in close contact with, under vacuum generator's effect, the steel ball can closely contradict and keep away from sealing member one end in the aperture cavity, make the air current can't pass through the aperture cavity, thereby make still be in vacuum state between aperture cavity and the vacuum generator, consequently, can be fixed in the wall with the total powerstation body through the sponge sucking disc on, thereby convenient to use.
Optionally, one end of the mounting body, which is far away from the sealing element, is fixedly connected with a protective cover, the protective cover is square with an opening at one end close to the mounting body and a hollow interior, and the energy accumulator and the vacuum generator are located in a cavity of the protective cover.
Through adopting above-mentioned technical scheme, energy memory, vacuum generator can be protected to the protection casing, reduces the pollution that energy memory, vacuum generator received, simultaneously, is convenient for install angle adjusting component, total powerstation body on the sponge sucking disc.
Optionally, the angle adjusting assembly includes two telescopic rods fixedly connected to the protective cover, and one end of each telescopic rod, which is far away from the protective cover, is hinged to the total station body.
Through adopting above-mentioned technical scheme, the total powerstation body articulates on two telescopic links, through adjusting the length of two telescopic links for the length of two telescopic links is different, thereby makes the angle between total powerstation body and the wall change, is convenient for operate.
Optionally, the telescopic link includes that fixed connection keeps away from the sleeve of protection casing one end, rotation connection in the sleeve and keeps away from the screw rod of sleeve one end, threaded connection in rotating the barrel and keeping away from sleeve one end, the sleeve is inside cavity, just the screw rod can stretch into in the sleeve, the screw rod articulates on the total powerstation body.
Through adopting above-mentioned technical scheme, can make the screw rod set up direction reciprocating motion along rotating a section of thick bamboo in rotating a section of thick bamboo through rotating a section of thick bamboo among the telescopic link to adjusting screw rod is in rotating the length outside the section of thick bamboo, and then the length of adjusting the telescopic link, simple structure, the operation of being convenient for.
Optionally, a driving assembly is arranged on the angle adjusting assembly, the driving assembly includes two first gears coaxially and fixedly connected to the rotating cylinder and a second gear engaged with the two first gears, the second gear is coaxially and fixedly connected with a first connecting rod, one end of the first connecting rod, which is far away from the second gear, is rotatably connected to the protective cover, and the threads on the two screws are opposite.
Through adopting above-mentioned technical scheme, can rotate the second gear through rotating the head rod, make two first gears rotate simultaneously, two first gear rotation directions are the same, make two rotating cylinder rotate simultaneously, and the direction of rotation is the same, because the screw thread on two screw rods is opposite, therefore, two telescopic links can an extension, a shortening, only need rotate the head rod just can adjust the length of two telescopic links simultaneously, need not to adjust the length of two telescopic links respectively, the operation of being convenient for reduces working strength.
Optionally, a third gear is coaxially and fixedly connected to the first connecting rod, the third gear is a bevel gear, the third gear is meshed with a fourth gear, the fourth gear is a bevel gear, the fourth gear is coaxially and fixedly connected to a second connecting rod, the second connecting rod is rotatably connected to a supporting plate, and the supporting plate is fixedly connected to the sponge sucker.
Through adopting above-mentioned technical scheme, through rotating the second connecting rod, can make the fourth gear, third gear revolve, and then make the head rod drive the second gear, first gear revolve, because the head rod is located between total powerstation body and the protection casing, be not convenient for operate, consequently, set up the third gear, the fourth gear, the direction of drive has been changed, the second connecting rod is located the easy handheld position of operator, can adjust the angle between total powerstation body and the wall through rotating the second connecting rod, the operation of being convenient for.
Optionally, a first connecting plate is arranged between the screw rod and the total station body, the two screw rods are hinged to the first connecting plate, the connecting assembly comprises a fixing plate fixedly connected to the first connecting plate and far away from the side face of the screw rod, a fixing block is fixedly connected to the total station body, and fasteners penetrate through the fixing plate and the fixing block.
Through adopting the above-mentioned technical scheme, be convenient for install the total powerstation body on angle adjusting component through setting up first connecting plate, and through coupling assembling, total powerstation body demountable installation is on the base, and can be through rotating the fixed block along the fixed plate axis, make total powerstation body perpendicular to ground, therefore, make the total powerstation body can be fixed in on the wall of various angles through the base, increase the range of application of total powerstation body, and when dismantling the total powerstation from the wall, can dismantle the total powerstation body from the base earlier, thereby make base convenient to detach, and simultaneously, when the base is maintained or is damaged, can dismantle the total powerstation body. The base is convenient to maintain and repair.
Optionally, the number of the fixing plates is two, a gap exists between the two fixing plates and a cavity is formed between the two fixing plates, the fixing blocks are matched with the cavity between the two fixing plates, and the fixing blocks are located between the two fixing plates.
Through adopting above-mentioned technical scheme, set up the fixed block between two fixed plates for it is more firm to be connected between total powerstation body and the base.
In summary, the present application includes at least one of the following beneficial technical effects:
1. by arranging the sponge sucker, the total station body can be adsorbed on the wall surface through the vacuum generator, when the wall surface is porous, because the sealing element of the sponge sucker is porous, and the independent valve body is provided with the plurality of aperture cavities and the steel balls in the aperture cavities, each pore on the sealing element can play the role of an independent vacuum sucker, and the pores can automatically sense whether the pore is in contact with the wall surface but not in contact with the wall surface;
2. by arranging the angle adjusting assembly, the lengths of the two telescopic rods can be adjusted to be different, so that the angle between the total station body and the wall surface can be adjusted;
3. through setting up drive assembly, can adjust the length of two telescopic links simultaneously through rotating the second connecting rod, the operation of being convenient for reduces working strength.
Drawings
Fig. 1 is a schematic structural view of the present invention fixed to a wall surface perpendicular to the ground.
Fig. 2 is a schematic view of the structure of the present embodiment fixed to the ground or roof.
Fig. 3 is an exploded schematic view of a sponge holder.
Fig. 4 is a partial cross-sectional view of the steel ball to show the aperture cavity.
Fig. 5 is an enlarged view of a portion a in fig. 4.
Fig. 6 is a schematic structural diagram for showing the angle adjusting assembly and the driving assembly.
Description of reference numerals: 1. a total station body; 2. a base; 21. a sponge sucker; 211. a seal member; 2111. a first opening; 212. an independent valve body; 213. an aperture cavity; 2131. a limiting plate; 214. steel balls; 215. an installation body; 2151. a vent hole; 216. an energy storage device; 217. a vacuum generator; 2171. an air exhaust hole; 2172. an air outlet valve; 218. a protective cover; 2181. a second opening; 22. an angle adjustment assembly; 221. a telescopic rod; 2211. a sleeve; 2212. a rotating cylinder; 2213. a screw; 222. a hinged block; 223. a hinge plate; 23. a first connecting plate; 24. a drive assembly; 241. a first gear; 242. a second gear; 243. a first connecting rod; 244. a third gear; 245. a fourth gear; 246. a second connecting rod; 247. a support plate; 248. a hand wheel; 25. a second connecting plate; 26. a connecting assembly; 261. a fixing plate; 262. a fixed block; 263. a fastener.
Detailed Description
The present application is described in further detail below with reference to figures 1-6.
The embodiment of the application discloses underground underdrain measuring equipment. Referring to fig. 1 and 2, the underground canal measuring apparatus includes a total station body 1, a base 2. Base 2 including can adsorb sponge sucking disc 21, fixed connection on the wall in sponge sucking disc 21 keep away from the angle adjusting part 22 of wall one end, articulate in angle adjusting part 22 and keep away from the first connecting plate 23 of sponge sucking disc 21 one end, total powerstation body 1 demountable installation is on first connecting plate 23.
Referring to fig. 3 and 4, the sponge suction cup 21 includes a sealing member 211, the sealing member 211 is square, and a plurality of first openings 2111 are uniformly formed on the sealing member 211. The top surface of the sealing member 211 is fixedly connected with an independent valve body 212, and the independent valve body 212 is square. Referring to fig. 5 again, a plurality of aperture cavities 213 are disposed on the independent valve body 212 along the height direction thereof, wherein one end of the aperture cavity 213 close to the sealing member 211 is cylindrical, and one end of the aperture cavity 213 far from the sealing member 211 is truncated cone-shaped. The aperture cavity 213 has an area away from the seal 211 that is smaller than an area near an end of the seal 211. Limiting plate 2131 is fixedly connected with the inside surface of aperture cavity 213 bottom, and limiting plate 2131 is the annular plate. The aperture cavity 213 is internally provided with a steel ball 214, the steel ball 214 is a sphere, the diameter of the steel ball 214 is larger than the end of the aperture cavity 213 far away from the sealing element 211, the diameter of the steel ball 214 is larger than the inner diameter of the limiting plate 2131, and the diameter of the steel ball 214 is smaller than the end of the aperture cavity 213 close to the sealing element 211.
Referring to fig. 3, an installation body 215 is fixedly connected to an end of the independent valve body 212 far from the sealing member 211, and the installation body 215 is square and has an opening facing the independent valve body 212 and a hollow interior. The side of the mounting body 215 away from the sealing member 211 is fixedly connected with a vacuum generator 217, and one end of the vacuum generator 217 is fixedly connected with an energy storage 216. The mounting body 215 is provided with a vent hole 2151 penetrating in the vertical direction, and the vacuum generator 217 is correspondingly provided with a suction hole 2171 communicated with the vent hole 2151. And an air outlet valve 2172 is fixedly connected to the vacuum generator 217, and the air outlet valve 2172 is communicated with the atmosphere. A protective cover 218 is fixedly connected to an end of the mounting body 215 away from the sealing member 211, and the protective cover 218 has a square shape with an opening facing one end of the independent valve body 212 and a hollow interior. The shield 218 defines a second opening 2181 adapted to the air outlet valve 2172, and the air outlet valve 2172 is disposed through the second opening 2181. An accumulator 216 and a vacuum generator 217 are located within the interior cavity of the shield 218.
Referring to fig. 6, the angle adjustment assembly 22 includes two telescoping rods 221 fixedly attached to the sides of the shield 218 away from the seal 211. Two extension rods 221 are respectively located at both ends of the shield 218 in the length direction thereof. The telescopic rod 221 includes a sleeve 2211 fixedly connected to the shield 218, the sleeve 2211 is perpendicular to the top surface of the shield 218, and the sleeve 2211 is a cylinder with a hollow interior. One end of the sleeve 2211 far away from the shield 218 is sleeved and rotatably connected with a rotating cylinder 2212. A screw 2213 is connected to one end of the rotating cylinder 2212 far away from the sleeve 2211 in a threaded manner, and the screw 2213 can extend into the cavity of the sleeve 2211. The screw threads on the screw 2213 of the two telescopic rods 221 are opposite. The end of the screw 2213 away from the rotary cylinder 2212 is fixedly connected with a hinge block 222, and the hinge block 222 is a U-shaped block opened toward one end of the first connecting plate 23. A hinge plate 223 is fixedly connected to the side surface of the first connecting plate 23 close to the screw 2213, and the hinge plate 223 is a square plate. Hinge plate 223 is hinged to hinge block 222.
Referring to fig. 6, a driving assembly 24 is disposed between the two telescopic rods 221. The driving assembly 24 includes two first gears 241 coaxially and fixedly connected to the rotary cylinder 2212, respectively. A second gear 242 is engaged between the two first gears 241. The second gear 242 is coaxially and fixedly connected with a first connecting rod 243, and the first connecting rod 243 is parallel to the rotary cylinder 2212. An end of the first connecting rod 243 remote from the second gear 242 is rotatably connected to the shield 218. The first connecting rod 243 is coaxially and fixedly connected with a third gear 244 on one side of the second gear 242 close to the protective cover 218, and the third gear 244 is a bevel gear. The third gear 244 is engaged with a fourth gear 245, and the fourth gear 245 is a bevel gear. A second connecting rod 246 is coaxially and fixedly connected to the fourth gear 245, and the second connecting rod 246 is parallel to the first connecting plate 23. The second connecting rod 246 is rotatably connected with a support plate 247, and one end of the support plate 247 away from the second connecting rod 246 is fixedly connected to the shield 218. A hand wheel 248 is fixedly connected to one end of the second connecting rod 246 away from the fourth gear 245.
Referring to fig. 2, two sets of connection assemblies 26 are provided between the first connection plate 23 and the total station body 1. The connecting assembly 26 includes two fixing plates 261 fixedly connected to the side of the first connecting plate 23 away from the angle adjusting assembly 22, and the fixing plates 261 are square plates. The width of the first connection plate 23 is the same as the length of the fixed plate 261. The two fixing plates 261 are parallel to each other at their sides close to each other, and a gap is formed between the two fixing plates 261 and a cavity is formed. The bottom surface fixedly connected with second connecting plate 25 of total powerstation body 1, second connecting plate 25 is square board. A fixed block 262 matched with the cavity between the two fixed plates 261 is fixedly connected to the side surface of the second connecting plate 25 close to the first connecting plate 23, and the fixed block 262 is square. The fixing plate 261 and the fixing block 262 are provided with fasteners 263 in a penetrating mode, the fasteners 263 are bolts, and spring bolts can be arranged as required. The total station body 1 is mounted on the first connection plate 23 by fasteners 263.
The implementation principle of underground underdrain measuring equipment of the embodiment of the application is as follows: when the total station body 1 needs to be fixed on a wall surface, a roof or the ground, the sealing member 211 is in close contact with the wall surface, the roof or the ground, and the sealing member 211 is adsorbed on the wall surface, the roof or the ground through the vacuum generator 217. The fixed block 262 on the second connecting plate 25 is then placed in the cavity between the two fixed plates 261, and the fixed block 262 is rotated along the axis of the fixed plate 261, so that the total station body 1 is perpendicular to the ground. Then, a fastener 263 is inserted, and the total station body 1 is mounted on the base 2 through the fastener 263.
When the total station body 1 is used, the total station body is always kept in a state of being perpendicular to the ground. Referring to fig. 1, when the base 2 is fixed to a wall surface perpendicular to the ground, the extension bar 221 is parallel to the ground, and the second connection plate 25 is parallel to the extension bar 221. Referring again to fig. 2, when the base 2 is fixed to the ground or the roof, the expansion link 221 is perpendicular to the ground, and the second connection plate 25 is perpendicular to the expansion link 221. By rotating the fixing block 262 along the axis of the fixing plate 261, the second connecting plate 25 is always in a state parallel to the ground, so that the total station body 1 is always in a state perpendicular to the ground.
The hand wheel 248 is rotated to drive the fourth gear 245 and the third gear 244 to rotate, and meanwhile, the first connecting rod 243 is driven to rotate, so that the second gear 242 and the first gear 241 are driven to rotate, the rotating directions of the two first gears 241 are the same, and the directions of the threads on the two screw rods 2213 are opposite, so that the two telescopic rods 221 are extended and shortened one by one, and the angle between the total station body 1 and the wall surface is adjusted. When the total station needs to be detached, the fastening pieces 263 are detached from the fixing plate 261 and the fixing block 262, and then the total station body 1 is detached. The vacuum generator 217 is turned off and the base 2 is removed from the wall. The utility model provides an underground underdrain measuring equipment not only can be fixed in ground to can be fixed in on wall, the roof, convenient to use.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. The utility model provides an underground underdrain measuring equipment, includes total powerstation body (1), base (2), its characterized in that: the base (2) comprises a sponge sucker (21), an angle adjusting assembly (22) fixedly connected with the sponge sucker (21) and a connecting assembly (26) arranged between the angle adjusting assembly (22) and the total station body (1), the sponge sucker (21) comprises a sealing element (211), an independent valve body (212) fixedly connected with the sealing element (211), a mounting body (215) fixedly connected with one end, far away from the sealing element (211), of the independent valve body (212), an energy storage device (216) fixedly mounted on the mounting body (215) and a vacuum generator (217) fixedly mounted on the mounting body (215), the vacuum generator (217) is fixedly communicated with an air suction hole (2171) and an air outlet valve (2172), the mounting body (215) is provided with an air vent hole (2151) communicated with the air suction hole (2171), and a plurality of aperture cavities (213) are arranged in the independent valve body (212), the aperture cavity (213) is close to sealing member (211) one end and is cylindrically, aperture cavity (213) keep away from sealing member (211) one end and be the round platform type, aperture cavity (213) are close to sealing member (211) one end area and are greater than and keep away from sealing member (211) one end area, aperture cavity (213) bottom medial surface fixedly connected with limiting plate (2131), limiting plate (2131) are the annular, be provided with steel ball (214) in aperture cavity (213), steel ball (214) diameter is greater than the diameter that sealing member (211) one end was kept away from in aperture cavity (213), steel ball (214) diameter is less than the diameter that aperture cavity (213) is close to sealing member (211) one end, steel ball (214) diameter is greater than limiting plate (2131) internal diameter.
2. The underground underdrain measurement apparatus of claim 1, wherein: the sealing device is characterized in that a protective cover (218) is fixedly connected to one end, far away from the sealing element (211), of the mounting body (215), the protective cover (218) is in a square shape with an opening close to one end of the mounting body (215) and a hollow interior, and the energy accumulator (216) and the vacuum generator (217) are located in a cavity of the protective cover (218).
3. The underground underdrain measurement apparatus of claim 2, wherein: the angle adjusting assembly (22) comprises two telescopic rods (221) fixedly connected to the protective cover (218), and one end, far away from the protective cover (218), of each telescopic rod (221) is hinged to the total station body (1).
4. The underground underdrain measurement apparatus of claim 3, wherein: the telescopic rod (221) comprises a sleeve (2211) fixedly connected to the protective cover (218), a rotating cylinder (2212) rotatably connected to one end, far away from the protective cover (218), of the sleeve (2211), and a screw rod (2213) in threaded connection with one end, far away from the sleeve (2211), of the rotating cylinder (2212, the sleeve (2211) is hollow, the screw rod (2213) can extend into the sleeve (2211), and the screw rod (2213) is hinged to the total station body (1).
5. The underground underdrain measurement apparatus of claim 4, wherein: be provided with drive assembly (24) on angle adjusting assembly (22), drive assembly (24) include two coaxial fixed connection first gear (241) on a rotary drum (2212), with two second gear (242) of first gear (241) meshing, second gear (242) coaxial fixed connection has head rod (243), the one end rotation of second gear (242) is kept away from in head rod (243) is connected on protection casing (218), two the screw thread on the screw rod (2213) is opposite.
6. The underground underdrain measurement apparatus of claim 5, wherein: the sponge suction cup is characterized in that a third gear (244) is coaxially and fixedly connected to the first connecting rod (243), the third gear (244) is a bevel gear, the third gear (244) is meshed with a fourth gear (245), the fourth gear (245) is a bevel gear, the fourth gear (245) is coaxially and fixedly connected with a second connecting rod (246), the second connecting rod (246) is rotatably connected to a supporting plate (247), and the supporting plate (247) is fixedly connected to the sponge suction cup (21).
7. The underground underdrain measurement apparatus of claim 4, wherein: be provided with first connecting plate (23) between screw rod (2213) and total powerstation body (1), two screw rod (2213) articulate on first connecting plate (23), coupling assembling (26) are including fixed plate (261) of fixed connection in first connecting plate (23) keeping away from screw rod (2213) side, fixedly connected with fixed block (262) on total powerstation body (1), wear to be equipped with fastener (263) on fixed plate (261), fixed block (262).
8. An underground underdrain measurement apparatus according to claim 7, wherein: the number of the fixing plates (261) is two, a gap exists between the two fixing plates (261) and a cavity is formed, the fixing blocks (262) are matched with the cavity between the two fixing plates (261), and the fixing blocks (262) are located between the two fixing plates (261).
CN202122101344.XU 2021-09-01 2021-09-01 Underground closed conduit measuring equipment Active CN215411081U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202122101344.XU CN215411081U (en) 2021-09-01 2021-09-01 Underground closed conduit measuring equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202122101344.XU CN215411081U (en) 2021-09-01 2021-09-01 Underground closed conduit measuring equipment

Publications (1)

Publication Number Publication Date
CN215411081U true CN215411081U (en) 2022-01-04

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ID=79664888

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202122101344.XU Active CN215411081U (en) 2021-09-01 2021-09-01 Underground closed conduit measuring equipment

Country Status (1)

Country Link
CN (1) CN215411081U (en)

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