CN208206745U - It is a kind of for evaluating the device of crack plugging effect under pressure water action - Google Patents
It is a kind of for evaluating the device of crack plugging effect under pressure water action Download PDFInfo
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- CN208206745U CN208206745U CN201820787334.1U CN201820787334U CN208206745U CN 208206745 U CN208206745 U CN 208206745U CN 201820787334 U CN201820787334 U CN 201820787334U CN 208206745 U CN208206745 U CN 208206745U
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Abstract
The utility model discloses a kind of for evaluating the device of crack plugging effect under pressure water action, including cabinet, demarcation plate is fixedly connected between the two sides of the cabinet inner wall, hydraulic fluid tank is fixedly connected at the top of the demarcation plate, the two sides of the cabinet inner wall and be located at demarcation plate basal sliding be connected with lifter plate, the two sides of cabinet inner wall bottom pass through bearing and are rotatably connected to threaded rod, the top of the threaded rod runs through lifter plate and extends to the top of lifter plate, is related to underwater concrete engineering crack blocking technology field.The device and method for being used to evaluate crack plugging effect under pressure water action, fracture simulation test specimen is realized well to be fixedly clamped well, it avoids and the case where tester has test fluid from results of fracture simulation test specimen with the leakage of hydraulic pressure interface in carrying out test process occurs, the detection accuracy for preventing from influencing fracture plugging effect ensure that crack blocks the accuracy of recruitment evaluation.
Description
Technical field
The present invention relates to underwater concrete engineering crack blocking technology fields, specially a kind of for evaluating pressure water action
The device and method of lower crack plugging effect.
Background technique
Concrete structure crack is concrete works Common Diseases, for structures such as dam, water tunnel, water pipelines,
Once there is crack in concrete, and water flow will be leaked largely from crack under the action of water pressure, causes bigger structure safety wind
Danger and social safety risk, the reparation in this crack are generally required to implement in the case where hydraulic pressure normal presence, generally be used
Scheme is high-pressure slip-casting etc., then repairs personnel and needs to carry out check and evaluation to the underwater plugging effect for repairing crack, to guarantee
Crack repairing is intact, therefore people need the plugging effect of fracture to test progress simulated experiment.
People are the water directly by simulation subsurface water current mostly when testing concrete plugging effect at present
With hydraulic pressure effect, aperture on fracture simulation test specimen is needed, however, such test mode can not achieve fracture simulation test specimen
It is fixedly clamped well, tester often occur has test fluid from results of fracture simulation test specimen and water in carrying out test process
The case where pressure interface leaks out, to seriously affect the detection accuracy of fracture plugging effect, not can guarantee Crack Sealing
The accuracy of stifled recruitment evaluation brings great inconvenience to the crack plugging effect evaluation work of tester.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides a kind of for evaluating crack plugging effect under pressure water action
Device and method, solve existing test mode can not achieve fracture simulation test specimen be fixedly clamped well, often
Tester occur has test fluid to happen from results of fracture simulation test specimen and the leakage of hydraulic pressure interface in carrying out test process
Problem.
(2) technical solution
In order to achieve the above object, the present invention is achieved by the following technical programs: one kind is for evaluating pressure water action
The device of lower crack plugging effect, including cabinet are fixedly connected with demarcation plate, the separation between the two sides of the cabinet inner wall
It is fixedly connected with hydraulic fluid tank at the top of plate, two sides of the cabinet inner wall and basal sliding for being located at demarcation plate is connected with lifting
Plate, the two sides of cabinet inner wall bottom pass through bearing and are rotatably connected to threaded rod, and the top of the threaded rod is through lifting
Plate and the top for extending to lifter plate, the threaded rod extend to the bottom that one end at the top of lifter plate passes through bearing and demarcation plate
Rotation connection, the outer surface that the threaded rod is located at the top of lifter plate are fixedly connected with first bevel gear, the lifter plate it is interior
Portion is fixedly connected with screw shell compatible with threaded rod, and the two sides of the hydraulic chamber interior wall bottom are fixed by fixed frame
Be connected with drive socket, and the internal whorl of drive socket is connected with screw rod, one end of the screw rod sequentially pass through hydraulic fluid tank and
Cabinet and the outside for extending to cabinet, the other end of the screw rod are rotatably connected to crushing block by bearing, in the hydraulic fluid tank
The bottom of wall and the top of demarcation plate offer the through-hole being mutually adapted, and the inside of through-hole is fixedly connected with rubber gasket
Piece.
Preferably, the side of the crushing block offers dashpot, and the inner wall of the dashpot is fixed by squeezing spring
It is connected with extrusion head, the extrusion head runs through crushing block far from the side for squeezing spring and extends to the side of crushing block, described
Extrusion head extends to the surface of crushing block side and a side contacts of rubber sheet gasketing.
Preferably, the two sides of the cabinet inner wall pass through bearing and are rotatably connected to drive rod, one end of the drive rod
It is fixedly connected with the second bevel gear being meshed with first bevel gear, the other end of the drive rod through cabinet and extends to machine
The outside of case, one end that the drive rod extends to outside cabinet are fixedly connected with rotating handle.
Preferably, the top of the lifter plate is connected with results of fracture simulation test specimen by limited block, and results of fracture simulation is tried
The top of part runs through through-hole and extends to the inside of through-hole.
Preferably, the bottom of the cabinet is fixedly connected with out water tank, and the bottom of water tank is fixedly connected with water draining beak out,
The bottom of the cabinet is fixedly connected with bottom plate by support frame, and the top movable of bottom plate be connected with it is compatible with water draining beak
Catchment measuring cup.
Preferably, be fixedly connected with water tank at the top of the cabinet, and the inside of water tank be fixedly connected with hydraulic pressure can
Water pump is controlled, the hydraulic pressure can control the water outlet of water pump to be communicated with outlet pipe, and the outlet pipe can control water pump far from hydraulic pressure
One end sequentially pass through cabinet and hydraulic fluid tank and extend to the inside of hydraulic fluid tank, the inside of the outlet pipe is fixedly connected with hydraulic
Sensor.
Preferably, the front of the cabinet is hinged with chamber door by hinge, and the positive top of cabinet is respectively fixedly connected with
There are control switch and display.
The invention also discloses a kind of methods for evaluating the device of crack plugging effect under pressure water action, specific to wrap
Include following steps:
S1, first the results of fracture simulation test specimen of pending test will be placed in the limiting slot of limited block formation by opening chamber door, so
Tester, which can be rotated rotating handle, afterwards makes drive rod pass through second bevel gear and first bevel gear drive threaded rod rotation respectively,
Threaded rod can drive results of fracture simulation test specimen to rise by screw shell and lifter plate respectively；
S2, when the top of results of fracture simulation test specimen is through through-hole and when being inserted into hydraulic fluid tank, the rotatable screw rod of tester makes
Screw rod passes through drive socket respectively and crushing block drives internal motion of the extrusion head to hydraulic fluid tank, makes extrusion head by rubber gasket
Piece is extruded in well on the surface of results of fracture simulation test specimen, so both installment works of achievable fracture simulation test specimen；
S3, chamber door is closed later, hydraulic fluid tank is filled into water, opening hydraulic pressure can control water pump to adjust water tank feed liquor flow,
It realizes and the water pressure of constant 50 meters~400 meters heads is provided into hydraulic fluid tank, hydrostatic sensor can be to the water pumped out from water tank
Pressure is detected, and the structure that will test is shown over the display, and the water in hydraulic fluid tank can be under pressure along splitting
Slit die intends test specimen and flows into out water tank；
S4, the valve in water draining beak is kept to open later, water under the action of water pressure, in results of fracture simulation test specimen gap
It is flowing, drills on results of fracture simulation test specimen, and implement slip casting until slip casting is completed, crack is substantially impermeable or small at this time
Leakage, continues 1 hour；
S5, the later valve on closing water draining beak, empty the liquid to catchment in measuring cup, adjust hydraulic pressure controllable type water pump and make
In hydraulic fluid tank constant pressure 50 meters~400 meters heads water pressure, constant pressure 24 hours；
S6, the controllable water pump of hydraulic pressure is finally closed, sheds the pressure in hydraulic fluid tank, opens the valve in water draining beak, will gone out
The liquid leaked in water tank is put into seepage flow into the measuring cup that catchments, and weighs the volume of liquid body exudate, pressure water action is quantitatively evaluated
The effect that lower crack blocks.
(3) beneficial effect
The present invention provides a kind of device and method for evaluating crack plugging effect under pressure water action.Have following
The utility model has the advantages that
(1), device and method for being used to evaluate crack plugging effect under pressure water action, by the two of cabinet inner wall
The side and basal sliding for being located at demarcation plate is connected with lifter plate, and the two sides of cabinet inner wall bottom are rotatably connected to by bearing
Threaded rod, then it is close by first bevel gear, drive rod, screw shell, drive socket, screw rod, crushing block, through-hole and rubber respectively
Gasket be equipped with, it can be achieved that by sealing ring well with the surface of results of fracture simulation test specimen carry out contact fitting well,
It realizes fracture simulation test specimen well in this way to be fixedly clamped well, avoids and tester occur and testing
There is the case where test fluid is leaked out from results of fracture simulation test specimen and hydraulic pressure interface in the process, prevents from influencing fracture plugging effect
Detection accuracy, ensure that crack block recruitment evaluation accuracy, thus greatly facilitate tester crack block effect
Fruit appraisal.
(2), device and method for being used to evaluate crack plugging effect under pressure water action, by solid in the bottom of cabinet
Surely it is connected with out water tank, and the bottom of water tank is fixedly connected with water draining beak out, then by solid by support frame in the bottom of cabinet
Surely it is connected with bottom plate, and the top movable of bottom plate is connected with the measuring cup that catchments compatible with water draining beak, it can be achieved that letting out in test
The water of leakage carries out centralized collection and measurement, to realize that fracture plugging effect carries out quantitative assessment well.
(3), device and method for being used to evaluate crack plugging effect under pressure water action, by solid at the top of cabinet
Surely it is connected with water tank, and the inside of water tank is fixedly connected with the controllable water pump of hydraulic pressure, then by can control water pump in hydraulic pressure
Water outlet be communicated with outlet pipe, and the inside of outlet pipe is fixedly connected with hydrostatic sensor, it can be achieved that inside to hydraulic fluid tank
Discharge pressure is detected and controlled, to ensure that results of fracture simulation test specimen can be detected under corresponding water pressure conditions.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention；
Fig. 2 is the cross-sectional view of structure of the invention；
Fig. 3 is the partial enlarged view in Fig. 2 of the present invention at A；
Fig. 4 is the partial enlarged view in Fig. 2 of the present invention at B；
Fig. 5 is the top view of lifter plate structure of the present invention.
In figure, 1 cabinet, 2 demarcation plates, 3 hydraulic fluid tanks, 4 lifter plates, 5 threaded rods, 6 first bevel gears, 7 screw shells, 8 are passed
Moving sleeve, 9 screw rods, 10 crushing blocks, 11 through-holes, 12 rubber sheet gasketings, 13 dashpots, 14 extrusion heads, 15 drive rods, 16
Two bevel gears, 17 rotating handles, 18 results of fracture simulation test specimens, 19 go out water tank, 20 water draining beaks, 21 bottom plates, 22 catchment measuring cup, 23 water storages
Case, 24 hydraulic pressure can control water pump, 25 outlet pipes, 26 hydrostatic sensors, 27 chamber doors, 28 control switches, 29 displays.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 1-5 is please referred to, the embodiment of the present invention provides a kind of technical solution: one kind is for evaluating crack under pressure water action
The device of plugging effect, including cabinet 1, the bottom of cabinet 1 are fixedly connected with out water tank 19, and water tank 19 has the work of water storage out
With, the bottom of water tank 19 is fixedly connected with water draining beak 20 out, and the bottom of cabinet 1 is fixedly connected with bottom plate 21 by support frame, and
The top movable of bottom plate 21 is connected with the measuring cup 22 that catchments compatible with water draining beak 20, is carved with scale, purpose on the measuring cup 22 that catchments
It is that people is facilitated to read the volume for collecting water in the measuring cup 22 that catchments, is fixedly connected with demarcation plate 2 between the two sides of 1 inner wall of cabinet,
The top of demarcation plate 2 is fixedly connected with hydraulic fluid tank 3, and the top of cabinet 1 is fixedly connected with water tank 23, and the top of water tank 23 connects
It is connected with water inlet pipe, it is therefore an objective to facilitate and add water into water tank 23, and the inside of water tank 23 is fixedly connected with the controllable water of hydraulic pressure
Pump 24, it is controllable type water pump that hydraulic pressure, which can control water pump 24, can be controlled the hydraulic pressure pumped out, and hydraulic pressure can control going out for water pump 24
The mouth of a river is communicated with outlet pipe 25, and outlet pipe 25 can control one end of water pump 24 to sequentially pass through cabinet 1 and hydraulic fluid tank 3 simultaneously far from hydraulic pressure
The inside of hydraulic fluid tank 3 is extended to, the inside of outlet pipe 25 is fixedly connected with hydrostatic sensor 26, the model of hydrostatic sensor 26
It is connected with lifter plate 4 for BP800, the two sides of 1 inner wall of cabinet and positioned at the basal sliding of demarcation plate 2, the top of lifter plate 4 is opened
Equipped with leak circular hole, it is therefore an objective to facilitate leak, the two sides of 1 inner wall bottom of cabinet pass through bearing and are rotatably connected to threaded rod 5, spiral shell
The top of rasp bar 5 runs through lifter plate 4 and extends to the top of lifter plate 4, and one end that threaded rod 5 extends to 4 top of lifter plate is logical
It crosses bearing to connect with the lower rotation of demarcation plate 2, the outer surface that threaded rod 5 is located at 4 top of lifter plate is fixedly connected with the first cone
Gear 6, the two sides of 1 inner wall of cabinet pass through bearing and are rotatably connected to drive rod 15, one end of drive rod 15 be fixedly connected with
The other end of the second bevel gear 16 that first bevel gear 6 is meshed, drive rod 15 through cabinet 1 and extends to the outer of cabinet 1
Portion, one end that drive rod 15 extends to outside cabinet 1 are fixedly connected with rotating handle 17, and the inside of lifter plate 4 is fixedly connected with
Screw shell 7 compatible with threaded rod 5, the two sides of 3 inner wall bottom of hydraulic fluid tank pass through fixed frame and are fixedly connected with drive sleeve
Cylinder 8, and the internal whorl of drive socket 8 is connected with screw rod 9, one end of screw rod 9 sequentially passes through hydraulic fluid tank 3 and cabinet 1 and extends
To the outside of cabinet 1, the other end of screw rod 9 is rotatably connected to crushing block 10 by bearing, the bottom of 3 inner wall of hydraulic fluid tank and point
The top of partition 2 offers the through-hole 11 being mutually adapted, and the top of lifter plate 4 is connected with results of fracture simulation by limited block
Test specimen 18, and the top of results of fracture simulation test specimen 18 runs through through-hole 11 and extends to the inside of through-hole 11, and the inside of through-hole 11 is solid
Surely it is connected with rubber sheet gasketing 12, the side of crushing block 10 offers dashpot 13, and the inner wall of dashpot 13 is by squeezing bullet
Spring is fixedly connected with extrusion head 14, and extrusion head 14 runs through crushing block 10 far from the side for squeezing spring and extends to crushing block 10
Side, extrusion head 14 extend to the surface of 10 side of crushing block and a side contacts of rubber sheet gasketing 12, and the front of cabinet 1 is logical
It crosses hinge and is hinged with chamber door 27, and the positive top of cabinet 1 is fixedly connected with control switch 28 and display 29 respectively.
The invention also discloses a kind of methods for evaluating the device of crack plugging effect under pressure water action, specific to wrap
Include following steps:
S1, the limiting slot that the results of fracture simulation test specimen 18 of pending test will be placed on limited block formation by chamber door 27 is first opened
Interior, then tester, which can be rotated rotating handle 17, makes drive rod 15 respectively by 6 band of second bevel gear 16 and first bevel gear
Dynamic threaded rod 5 rotates, and threaded rod 5 can drive results of fracture simulation test specimen 18 to rise by screw shell 7 and lifter plate 4 respectively；
S2, when the top of results of fracture simulation test specimen 18 is through through-hole 11 and when being inserted into hydraulic fluid tank 3, the rotatable silk of tester
Bar 9 makes screw rod 9 drive internal motion of the extrusion head 14 to hydraulic fluid tank 3 by drive socket 8 and crushing block 10 respectively, makes to squeeze
First 14 are extruded in rubber sheet gasketing 12 well on the surface of results of fracture simulation test specimen 18, so both achievable fracture simulations
The installment work of test specimen 18；
S3, close chamber door 27 later, hydraulic fluid tank 3 filled into water, open hydraulic pressure can control water pump 24 adjust water tank 23 into
Flow quantity realizes and provides the water pressure of constant 50 meters~400 meters heads into hydraulic fluid tank 3, and hydrostatic sensor 26 can be to from water storage
The hydraulic pressure that case 23 pumps out is detected, and the structure that will test is shown on display 29, and the water in hydraulic fluid tank 3 can press
Water tank is flowed into out along results of fracture simulation test specimen 18 under power effect；
S4, the valve in water draining beak 20 is kept to open later, under the action of water pressure, in 18 gap of results of fracture simulation test specimen
Water be flowing, drill on results of fracture simulation test specimen 18, and implement slip casting until slip casting complete, crack is substantially impermeable at this time
Or minor leakage, continue 1 hour；
S5, the later valve on closing water draining beak 20, empty the liquid to catchment in measuring cup 22, adjust hydraulic pressure controllable type water pump
24 make constant pressure in hydraulic fluid tank 3 in the water pressure of 50 meters~400 meters heads, and constant pressure 24 hours；
S6, the controllable water pump 24 of hydraulic pressure is finally closed, sheds the pressure in hydraulic fluid tank 3, opens the valve in water draining beak 20
Door, is put into seepage flow into the measuring cup 22 that catchments for the liquid leaked in water tank 19 out, the volume of liquid body exudate is weighed, to be quantitatively evaluated
The effect that crack blocks under pressure water action.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (7)
1. a kind of for evaluating the device of crack plugging effect under pressure water action, including cabinet (1), it is characterised in that: described
It is fixedly connected with demarcation plate (2) between the two sides of cabinet (1) inner wall, is fixedly connected with hydraulic fluid tank at the top of the demarcation plate (2)
(3), the two sides of cabinet (1) inner wall and be located at demarcation plate (2) basal sliding be connected with lifter plate (4), the cabinet (1)
The two sides of inner wall bottom pass through bearing and are rotatably connected to threaded rod (5), and lifter plate (4) are run through on the top of the threaded rod (5)
And the top of lifter plate (4) is extended to, the threaded rod (5) extends to one end at the top of lifter plate (4) by bearing and separates
The lower rotation of plate (2) connects, and the threaded rod (5) is located at the outer surface at the top of lifter plate (4) and is fixedly connected with the first cone tooth
It takes turns (6), the inside of the lifter plate (4) is fixedly connected with and threaded rod (5) compatible screw shell (7), the hydraulic fluid tank
(3) two sides of inner wall bottom pass through fixed frame and are fixedly connected with drive socket (8), and the internal whorl of drive socket (8) connects
It being connected to screw rod (9), one end of the screw rod (9) sequentially passes through hydraulic fluid tank (3) and cabinet (1) and the outside for extending to cabinet (1),
The other end of the screw rod (9) is rotatably connected to crushing block (10) by bearing, the bottom of hydraulic fluid tank (3) inner wall and separation
The top of plate (2) offers the through-hole (11) being mutually adapted, and the inside of through-hole (11) is fixedly connected with rubber sheet gasketing
(12)。
2. according to claim 1 a kind of for evaluating the device of crack plugging effect under pressure water action, feature exists
In: the side of the crushing block (10) offers dashpot (13), and the inner wall of the dashpot (13) is fixed by squeezing spring
It is connected with extrusion head (14), the extrusion head (14) runs through crushing block (10) far from the side for squeezing spring and extends to crushing block
(10) side, the extrusion head (14) extend to the surface of crushing block (10) side and the one of rubber sheet gasketing (12) and flank
Touching.
3. according to claim 1 a kind of for evaluating the device of crack plugging effect under pressure water action, feature exists
In: the two sides of cabinet (1) inner wall pass through bearing and are rotatably connected to drive rod (15), and one end of the drive rod (15) is solid
Surely it is connected with the second bevel gear (16) being meshed with first bevel gear (6), the other end of the drive rod (15) runs through cabinet
(1) and the outside of cabinet (1) is extended to, the drive rod (15) extends to the external one end of cabinet (1) and is fixedly connected with rotation
Handle (17).
4. according to claim 1 a kind of for evaluating the device of crack plugging effect under pressure water action, feature exists
In: the top of the lifter plate (4) is connected with results of fracture simulation test specimen (18) by limited block, and results of fracture simulation test specimen (18)
Top through through-hole (11) and extend to the inside of through-hole (11).
5. according to claim 1 a kind of for evaluating the device of crack plugging effect under pressure water action, feature exists
In: the bottom of the cabinet (1) is fixedly connected with out water tank (19), and the bottom of water tank (19) is fixedly connected with water draining beak out
(20), the bottom of the cabinet (1) is fixedly connected with bottom plate (21) by support frame, and the top movable of bottom plate (21) is connected with
The compatible measuring cup that catchments (22) with water draining beak (20).
6. according to claim 1 a kind of for evaluating the device of crack plugging effect under pressure water action, feature exists
In: it is fixedly connected with water tank (23) at the top of the cabinet (1), and to be fixedly connected with hydraulic pressure controllable for the inside of water tank (23)
Water pump (24) processed, the hydraulic pressure can control the water outlet of water pump (24) to be communicated with outlet pipe (25), and the outlet pipe (25) is separate
Hydraulic pressure can control one end of water pump (24) to sequentially pass through cabinet (1) and hydraulic fluid tank (3) and the inside for extending to hydraulic fluid tank (3), institute
The inside for stating outlet pipe (25) is fixedly connected with hydrostatic sensor (26).
7. according to claim 1 a kind of for evaluating the device of crack plugging effect under pressure water action, feature exists
In: the front of the cabinet (1) is hinged with chamber door (27) by hinge, and cabinet (1) positive top is fixedly connected with respectively
Control switch (28) and display (29).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820787334.1U CN208206745U (en) | 2018-05-23 | 2018-05-23 | It is a kind of for evaluating the device of crack plugging effect under pressure water action |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820787334.1U CN208206745U (en) | 2018-05-23 | 2018-05-23 | It is a kind of for evaluating the device of crack plugging effect under pressure water action |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108867555A (en) * | 2018-05-23 | 2018-11-23 | 新疆北方建设集团有限公司 | A kind of device and method for evaluating crack plugging effect under pressure water action |
| CN111998988A (en) * | 2020-08-28 | 2020-11-27 | 杭州西非电子信息技术有限公司 | Water pressure monitoring device capable of automatically repairing underwater cracks of dam |
| CN116922625A (en) * | 2023-09-19 | 2023-10-24 | 天津市永康食品有限公司 | Plastic packaging high-precision forming die for egg barrels |
-
2018
- 2018-05-23 CN CN201820787334.1U patent/CN208206745U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108867555A (en) * | 2018-05-23 | 2018-11-23 | 新疆北方建设集团有限公司 | A kind of device and method for evaluating crack plugging effect under pressure water action |
| CN111998988A (en) * | 2020-08-28 | 2020-11-27 | 杭州西非电子信息技术有限公司 | Water pressure monitoring device capable of automatically repairing underwater cracks of dam |
| CN116922625A (en) * | 2023-09-19 | 2023-10-24 | 天津市永康食品有限公司 | Plastic packaging high-precision forming die for egg barrels |
| CN116922625B (en) * | 2023-09-19 | 2023-11-28 | 天津市永康食品有限公司 | Plastic packaging high-precision forming die for egg barrels |
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