CN111827376A - Device and method for detecting sealing pressure resistance of acoustic pipe for cast-in-place pile - Google Patents
Device and method for detecting sealing pressure resistance of acoustic pipe for cast-in-place pile Download PDFInfo
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- CN111827376A CN111827376A CN202010820367.3A CN202010820367A CN111827376A CN 111827376 A CN111827376 A CN 111827376A CN 202010820367 A CN202010820367 A CN 202010820367A CN 111827376 A CN111827376 A CN 111827376A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
Abstract
The invention provides a device for detecting the sealing pressure resistance of an acoustic pipe for a cast-in-place pile and a method for using the device, wherein the device comprises a sealed container, an end cover assembly and a hydraulic lifting mechanism; the end cover assembly is connected to the top end opening of the sealed container in a sealing mode, and the lower surface of the end cover assembly is provided with an elastic gasket; the end cover assembly and the elastic gasket are also provided with air vents communicated with the interior of the sounding pipe; the hydraulic lifting mechanism is arranged in the inner cavity and positioned below the elastic gasket, and comprises an oil-filled shell and a lifting platform; the oil-filled shell is provided with an oil-filled cavity for containing hydraulic oil, and the oil-filled shell is also connected with an oil pipeline; the lifting platform or the oil-filled shell is used for abutting against the end part of the sound measuring tube; when the oil charging chamber is continuously filled with hydraulic oil through the oil pipeline, the lifting platform and the oil charging shell can be pushed to move upwards until the end part of the sounding pipe is in close contact with the elastic gasket. Compared with the prior art, the welding operation is not needed, the workload is reduced, and the detection efficiency is improved.
Description
Technical Field
The invention belongs to the field of performance detection of a sound-measuring tube for a cast-in-place concrete pile, and particularly relates to a device and a method for detecting the sealing pressure resistance of the sound-measuring tube for the cast-in-place concrete pile.
Background
The steel thin-wall acoustic pipe for the concrete cast-in-place pile is an indispensable acoustic detection pipe, the integrity of the pile body of one pile can be detected by using the acoustic pipe, and the acoustic pipe is a channel for a probe to enter the pile body when the cast-in-place pile is subjected to ultrasonic detection. The method is an important component of an ultrasonic detection system of the cast-in-place pile, and the detection result can be directly influenced by the pre-embedding mode of the method in the pile and the arrangement mode of the method on the cross section of the pile.
The self sealing pressure resistance of the sounding pipe is particularly important for ultrasonic detection of a subsequent cast-in-place pile, and the accuracy of an ultrasonic detection result of the cast-in-place pile is directly influenced. Therefore, the self-sealing pressure resistance of the acoustic pipe needs to be detected in advance.
The detection device in the prior art is shown in fig. 4, and comprises a sealed container 1 with an opening at the top end and a flange 6 for plugging the opening at the top end of the sealed container 1, wherein hydraulic oil is filled in the sealed container 1, and a connecting pipe 61 is arranged on the flange 6; during detection, the sound detection tube 5 needs to be hermetically arranged in the sealed container 1. In order to achieve the purpose, before detection, one end of the sound measuring tube 5 is welded on the connecting tube 61, the other end of the sound measuring tube 5 is welded with the bottom plate 51, then the sound measuring tube 5 is placed in the sealed container 1, and then the flange 6 is fixed at the opening of the sealed container 1; during detection, pressurizing the inside of the sealed container 1 to ensure that the internal pressure of the sealed container 1 is twice of the designed maximum working pressure of the sound detection tube 5 and keeps for 1min, and finally observing whether the sound detection tube 5 leaks or not; if no leakage exists, the sound testing pipe 5 is in accordance with the requirement of the external pressure test, otherwise, the sound testing pipe is not in accordance with the requirement of the external pressure test. After the detection is completed, the sounding pipe 5 is knocked out from the connecting pipe 61 so as to detect the next sounding pipe 5.
Before the above-mentioned testing process, need weld the sounding pipe on the connecting pipe, detect the completion back, still will knock out the sounding pipe from the ring flange for work load is big, and detection efficiency is low, leads to this detection device to use very inconveniently.
Disclosure of Invention
The invention aims to provide a device for detecting the sealing pressure resistance of an acoustic pipe for a cast-in-place pile, and aims to solve the problems of large workload and low detection efficiency caused by the fact that the acoustic pipe needs to be welded on a connecting pipe in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a sound survey pipe seals pressure resistance detection device for bored concrete pile, includes:
the inner cavity of the sealed container is used for containing hydraulic oil, and the top end of the sealed container is provided with an opening; the sealed container is also provided with a pressurizing port communicated with the inner cavity and a pressure gauge for monitoring the pressure of the inner cavity;
the end cover assembly is connected to the opening at the top end of the sealed container in a sealing mode, an elastic gasket is arranged on the lower surface of the end cover assembly and is used for being in sealing abutting joint with one end of the sounding pipe; the end cover assembly and the elastic gasket are also provided with air vents communicated with the interior of the sounding pipe;
the hydraulic lifting mechanism is arranged in the inner cavity and positioned below the elastic gasket, and comprises an oil-filled shell and a lifting platform positioned in the oil-filled shell; the oil-filled shell is provided with an oil-filled cavity for containing hydraulic oil, and is also connected with an oil pipeline which is communicated with the oil-filled cavity and penetrates through the side wall of the sealed container; the lifting platform or the oil-filled shell is used for being abutted against the other end of the sounding pipe;
when the oil filling cavity is continuously filled with hydraulic oil through the oil pipeline, the lifting platform and the oil filling shell are pushed by the hydraulic oil to move upwards until the end part of the sounding pipe is in airtight abutting joint with the elastic gasket.
As another embodiment of the present invention, the oil-filled housing includes a first housing and a second housing located below the first housing;
the first shell is made of a telescopic material, and the top of the first shell is closed; a lifting plate is arranged in the first shell; the lifting platform is positioned in the first shell, the bottom end of the lifting platform is connected with the lifting plate, and the top end of the lifting platform is connected with the inner wall of the top of the first shell; the outer wall of the top of the first shell is abutted against the end part of the sounding pipe;
the second shell, the part of the first shell, which is positioned below the lifting plate, and the lifting plate enclose the oil-filled cavity; the oil line is connected to the second housing.
As another embodiment of the present invention, the elevating platform includes:
the bottom end of the lifting shell is fixedly connected with the lifting plate, and the top end of the lifting shell is provided with an opening;
the cover plate is connected to the opening at the top end of the lifting shell and is connected with the inner wall of the top of the first shell;
an elastic piece is arranged in the lifting shell, the bottom end of the elastic piece is abutted against the bottom wall of the lifting shell, and the top end of the elastic piece is abutted against the cover plate; the elastic piece is used for buffering the downward pulling force of the sounding pipe when the lifting platform and the first shell fall downwards.
As another embodiment of the present invention, an annular connecting plate is further disposed between the lifting housing and the cover plate, and a first sealing gasket is embedded in the annular connecting plate.
As another embodiment of the present invention, the top outer wall of the first casing abuts against the end of the sounding pipe through an abutting block; the abutting block is used for abutting against the central part of the sounding pipe;
and a supporting plate for enabling the sounding pipe to penetrate through and supporting the sounding pipe is further arranged in the inner cavity.
As another embodiment of the present invention, the end cap assembly includes:
the end cover body is positioned at the opening at the top end of the sealed container and used for plugging the inner cavity; and
and the tightly-pushing assembly is arranged between the end cover body and the sealed container, is respectively abutted against the upper surface of the end cover body and the side wall of the sealed container, and is used for tightly pushing the end cover body at the top end opening of the sealed container.
As another embodiment of the invention, the lower surface of the end cover body is provided with a press-fitting part and a clamping part which are sequentially connected from top to bottom; the outer edge of the end cover body protrudes outwards in the radial direction relative to the press-fitting part, and the outer edge of the press-fitting part protrudes outwards in the radial direction relative to the clamping part; the elastic gasket is arranged on the lower surface of the clamping part;
the top end of the sealed container is provided with a connecting part which protrudes outwards along the radial direction, and the connecting part is also provided with an annular press-mounting groove;
the lower surface of the part of the end cover body, which protrudes out of the press-mounting part, is abutted against the upper surface of the connecting part; the outer peripheral surface of the press-mounting part is abutted against the side wall of the press-mounting groove, and the lower surface of the part of the press-mounting part, which protrudes out of the clamping part, is abutted against the bottom wall of the press-mounting groove; the outer peripheral surface of the clamping portion abuts against the inner wall surface of the sealed container.
As another embodiment of the present invention, an upper surface of the press-fitting portion and an upper surface of the connecting portion are coplanar, and a sealing gasket is further disposed between the press-fitting portion, the connecting portion and the end cap body;
and a second sealing washer is arranged between the press-mounting part and the bottom wall of the press-mounting groove.
As another embodiment of the invention, at least two jacking assemblies are arranged at intervals along the circumferential direction of the end cover body; the tight subassembly in top includes:
the abutting shell is provided with an accommodating groove and an accommodating cavity which is communicated with the accommodating groove and is positioned above the accommodating groove, and the opening of the accommodating groove faces the end cover assembly; the bottom wall of the accommodating groove is abutted against the outer peripheral surface of the connecting part and the outer peripheral surface of the end cover body, and the lower groove side wall of the accommodating groove is abutted against the lower surface of the connecting part;
the lower surface of the I-shaped jacking piece is abutted against the upper surface of the end cover body, and the upper part of the I-shaped jacking piece upwards penetrates through the accommodating groove and is arranged in the accommodating cavity; a jacking spring arranged along the up-down direction is arranged between the upper part of the I-shaped jacking piece and the cavity wall of the accommodating cavity; and
the cam is located in the containing cavity and connected with a handle, and the handle penetrates out of the jacking shell.
The sound-detecting tube sealing pressure resistance detection device for the cast-in-place pile has the beneficial effects that: the sound measuring tube is arranged in the sealed container during detection, the end part of the sound measuring tube is abutted against the oil-filled shell (or the lifting platform), hydraulic oil is continuously introduced into the oil-filled cavity through the oil pipeline, the lifting platform and the oil-filled shell are pushed to move upwards by the added hydraulic oil until the end part of the sound measuring tube is abutted against the elastic gasket in a sealed manner, and therefore the purpose of connecting the sound measuring tube in the sealed container in a sealed manner is achieved. Compared with the prior art, the sounding pipe does not need to be connected with the end cover assembly in a manual welding mode, so that a welding procedure is avoided, the workload is reduced, and the detection efficiency is improved.
The invention also provides a method for detecting the sealing pressure resistance of the acoustic pipe for the cast-in-place pile, which comprises the following steps:
placing a sounding pipe in the sounding pipe sealing pressure resistance detection device for the cast-in-place pile, and connecting one end of the sounding pipe with the lifting platform or the oil-filled shell;
hermetically connecting the end cover assembly to the top end opening of the sealed container;
hydraulic oil is continuously introduced into the oil-filled cavity through the oil pipeline, the hydraulic oil pushes the lifting platform and the oil-filled shell to move upwards until the other end of the sounding pipe is in close abutting joint with the elastic gasket;
pressurizing the inside of the sealed container through a pressurizing port, so that the internal pressure of the sealed container is twice of the designed maximum working pressure of the sounding pipe and is kept for 1 min;
observing whether the vent hole leaks the hydraulic oil; if no leakage exists, the sound testing pipe is in accordance with the requirement of the external pressure test, otherwise, the sound testing pipe is not in accordance with the requirement of the external pressure test.
According to the method for detecting the sealing pressure resistance of the acoustic pipe for the cast-in-place pile, provided by the invention, the acoustic pipe is subjected to sealing external pressure resistance detection by using the device for detecting the sealing pressure resistance of the acoustic pipe for the cast-in-place pile, so that the workload of the airtight connection of the acoustic pipe, the sealed container and the end cover assembly can be reduced, and the detection efficiency can be improved.
Drawings
Fig. 1 is a schematic structural diagram of a device for detecting sealing pressure resistance of an acoustic pipe for a cast-in-place pile according to an embodiment of the present invention;
FIG. 2 is an enlarged schematic view of circle A in FIG. 1;
FIG. 3 is an enlarged schematic view of the structure of FIG. 1 at circle B;
fig. 4 is a schematic structural diagram of a device for detecting sealing pressure resistance of an acoustic pipe for a cast-in-place pile in the prior art.
In the figure: 1. sealing the container; 10. an inner cavity; 11. a pressurizing port; 12. a pressure gauge; 13. a butting block; 14. a support plate; 15. a connecting portion; 150. pressing and assembling the groove; 2. an end cap assembly; 20. a vent; 21. an end cap body; 22. a press-fitting section; 23. a clamping part; 24. jacking the assembly; 241. tightly pushing the shell; 2410. a containing groove; 2411. an accommodating cavity; 2412. a partition plate; 242. an I-shaped top fastening piece; 243. the spring is tightly propped; 244. a cam; 245. a handle; 25. sealing gaskets; 26. a second sealing gasket; 3. an elastic pad; 4. a hydraulic lifting mechanism; 41. an oil-filled housing; 410. an oil-filled chamber; 411. a first housing; 412. a second housing; 42. a lifting platform; 421. lifting the housing; 422. a cover plate; 423. an annular connecting plate; 424. a first sealing gasket; 43. an oil pipeline; 44. a lifting plate; 45. an elastic member; 5. a sound detection tube; 51. a base plate; 6. a flange plate; 61. and (4) connecting the pipes.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 to fig. 3, the sealing pressure resistance detection device for an acoustic pipe for a cast-in-place pile according to the present invention will now be described. The sound-detecting tube sealing pressure resistance detection device for the cast-in-place pile comprises a sealing container 1, an end cover assembly 2 and a hydraulic lifting mechanism 4.
The inner cavity 10 of the sealed container 1 is used for containing hydraulic oil, and the top end of the sealed container is provided with an opening; the sealed container 1 is further provided with a pressurizing port 11 communicating with the inner chamber 10, and a pressure gauge 12 for monitoring the pressure of the inner chamber 10.
The end cover assembly 2 is connected to the top opening of the sealed container 1 in a sealing mode, the lower surface of the end cover assembly is provided with an elastic gasket 3, and the elastic gasket 3 is used for being in sealing abutting joint with one end of the sounding pipe 5; the end cap assembly 2 and the resilient pad 3 are further provided with a vent 20 for communicating with the interior of the acoustic pipe 5.
The hydraulic lifting mechanism 4 is arranged in the inner cavity 10 and below the elastic gasket 3, and comprises an oil-filled shell 41 and a lifting platform 42 positioned in the oil-filled shell 41; the oil-filled housing 41 is provided with an oil-filled chamber 410 for containing hydraulic oil, and the oil-filled housing 41 is also connected with an oil pipeline 43 which is communicated with the oil-filled chamber 410 and penetrates through the side wall of the sealed container 1; the elevating table 42 or the oil-filled casing 41 is adapted to abut against the other end of the acoustic pipe 5.
When the oil-filled chamber 410 is continuously filled with hydraulic oil through the oil pipeline 43, the hydraulic oil pushes the lifting table 42 and the oil-filled housing 41 to move upward until the end of the sounding pipe 5 is in close contact with the elastic gasket 3.
The use process of the acoustic pipe sealing pressure resistance detection device for the cast-in-place pile provided by the invention is as follows:
before detection, firstly welding a bottom plate 51 at one end of the sound measuring tube 5, placing the sound measuring tube 5 in the sealed container 1, and connecting the bottom plate 51 with the lifting table 42 or the oil-filled shell 41; the end cover component 2 is hermetically connected to the opening at the top end of the sealed container 1; when the oil-filled chamber 410 is continuously filled with hydraulic oil through the oil pipeline 43, the added hydraulic oil pushes the lifting table 42 and the oil-filled housing 41 to move upwards until the other end of the sounding pipe 5 is in close contact with the elastic gasket 3.
During detection, the inside of the sealed container 1 is pressurized through the pressurizing port 11, so that the internal pressure of the sealed container 1 is twice of the designed maximum working pressure of the sounding pipe 5 and is kept for 1 min; observing whether the hydraulic oil leakage phenomenon occurs at the air vent 20; if no leakage exists, the sound testing pipe 5 is in accordance with the requirement of the external pressure test, otherwise, the sound testing pipe is not in accordance with the requirement of the external pressure test.
After the detection is finished, oil is drained through the oil pipeline 43, so that the liquid level of hydraulic oil in the oil filling cavity 410 is lowered, the lifting platform 42 and the oil filling shell 41 move downwards, and the sound measuring tube 5 is not connected with the elastic gasket 3 in a sealing mode any more. And finally, opening the end cover assembly 2, taking out the sounding pipes 5, and detecting the sealing pressure resistance of the next group of sounding pipes 5.
In this embodiment, the sealing pressure resistance of the plurality of acoustic pipes 5 can be simultaneously detected. The sound tubes 5 are arranged on the oil-filled housing 41 at intervals, as shown in fig. 1.
In addition, the sounding pipe 5 needs to be always in a vertical state during detection, and in order to achieve the above purpose, a structure for keeping the sounding pipe 5 in the vertical state may be provided on the outer wall of the top of the oil-filled housing 41, and/or a structure for keeping the sounding pipe 5 in the vertical state may be provided in the inner cavity 10.
According to the device for detecting the sealing pressure resistance of the sounding pipe for the cast-in-place pile, provided by the invention, during detection, the sounding pipe 5 is arranged in the sealed container 1, the end part of the sounding pipe 5, which is connected with the bottom plate 51, is abutted against the oil-filled shell 41 (or the lifting platform 42), hydraulic oil is continuously introduced into the oil-filled cavity 410 through the oil pipeline 43, the lifting platform 42 and the oil-filled shell 41 are pushed to move upwards by the added hydraulic oil, and the end part of the sounding pipe 5 is abutted against the elastic gasket 3 in a sealing manner, so that the purpose of connecting the sounding pipe 5 in the sealed container 1 in a sealing manner is realized. Compared with the prior art, the sounding pipe 5 is not required to be connected with the end cover assembly 2 in a manual welding mode, so that the welding procedure is avoided, the workload is reduced, and the detection efficiency is improved.
As the oil-filled housing 41 needs to complete the lifting function and the oil-filled chamber 410 needs to be filled with hydraulic oil, in order to achieve the above function, referring to fig. 1, as a specific embodiment of the apparatus for detecting the sealing pressure resistance of the sounding pipe for a bored concrete pile provided in the present invention, the oil-filled housing 41 includes a first housing 411 and a second housing 412 located below the first housing 411.
The first shell 411 is made of a scalable material, and the top of the first shell 411 is closed; a lifting plate 44 is arranged in the first shell 411; the lifting platform 42 is positioned in the first shell 411, the bottom end of the lifting platform is connected with the lifting plate 44, and the top end of the lifting platform is connected with the inner wall of the top part of the first shell 411; the top outer wall of the first housing 411 abuts against the end of the sound tube 5.
The second housing 412, the portion of the first housing 411 below the lifting plate 44, and the lifting plate 44 enclose the oil-filled chamber 410; the oil line 43 is connected to the second housing 412.
The lifting plate 44 separates the oil-filled chamber 410 and the lifting platform 42 into different spaces, that is, the hydraulic oil in the oil-filled chamber 410 cannot permeate into the space where the lifting platform 42 is located; the top of the first housing 411 is closed, and hydraulic oil in the sealed container 1 can be isolated. Therefore, there is no hydraulic oil in the space enclosed by the lifting plate 44 and the first housing 411, and the lifting platform 42 can be prevented from being polluted by hydraulic oil, and the lifting platform 42 can only receive the thrust in the up-down direction, and the side surface can not receive pressure, so that the lifting platform 42 can be ensured to be lifted stably.
When the oil-filled cavity 410 is continuously filled with hydraulic oil or drained of hydraulic oil through the oil pipeline 43, the hydraulic oil pushes the lifting plate 44 to complete the lifting action, and further pushes the lifting table 42 to lift, because the first shell 411 is made of a telescopic material, and the top end of the lifting table 42 is connected with the inner wall of the top of the first shell 411, the lifting table 42 can also push the first shell 411 to extend or shorten when lifting, and thus the lifting action of the sounding pipe 5 is completed.
Specifically, the side wall of the first housing 411 is made of a rubber material, and the rubber housing has a certain extensibility and can be extended or shortened. The function of the rubber housing to provide ductility is well known in the art and will not be described further herein.
When the hydraulic oil in oil charge cavity 410 is drained, if the draining speed is too fast, it may cause lifter plate 44, elevating platform 42 and first casing 411 to descend fast, drive sounding pipe 5 to descend fast, if sounding pipe 5 descends too fast, there is sounding pipe 5 to damage, influences the problem of subsequent use. In order to solve the problem of rapid descending of the sounding pipe 5, referring to fig. 1 and fig. 2, on the basis of the above embodiment, the structure of the lifting table 42 is disassembled, and the elastic member 45 is disposed in the lifting table 42.
Specifically, the lifting platform 42 comprises a lifting housing 421 and a cover plate 422, the bottom end of the lifting housing 421 is fixedly connected with the lifting plate 44, and the top end has an opening; the cover 422 is connected to the top opening of the lifting housing 421 and connected to the top inner wall of the first housing 411; wherein, the lifting shell 421 is provided with an elastic element 45, and the bottom end of the elastic element 45 is abutted with the bottom wall of the lifting shell 421; the top end of the elastic member 45 abuts against the cover 422.
When the hydraulic oil in the oil-filled chamber 410 is discharged, even if the oil drainage speed is fast, the lifting plate 44 and the lifting housing 421 are fast lowered, however, because the elastic member 45 is arranged in the lifting housing 421, under the action of the elastic member 45, the detached part of the elastic member 45 pulls the cover plate 422 and the first housing 411 downwards, that is, the elastic member 45 buffers the downward pulling force on the sounding pipe 5 when the lifting table 42 and the first housing 411 are lowered downwards, so as to achieve the purpose of slowly lowering the sounding pipe 5.
Specifically, an annular connecting plate 423 is further disposed between the lifting housing 421 and the cover plate 422, and a first sealing gasket 424 is further disposed between the annular connecting plate 423 and the lifting housing 421.
Referring to fig. 1 and fig. 2, as an embodiment of the apparatus for detecting sealing pressure resistance of a sounding pipe for a bored concrete pile according to the present invention, the top outer wall of the first housing 411 is abutted to the end of the sounding pipe 5 through the abutting block 13, that is, abutted to the bottom plate 51; the abutting block 13 is used for abutting against the central part of the acoustic pipe 5; in addition, in order to ensure that the sounding pipe 5 is always in a vertical state, a supporting plate 14 for allowing the sounding pipe 5 to pass through and supporting the sounding pipe 5 is further arranged in the inner cavity 10.
Specifically, the size of the abutting block 13 is much smaller than that of the bottom plate 51, so that the contact area between the abutting block 13 and the bottom plate 51 can be reduced, that is, the part of the bottom plate 51 connected with the sounding pipe 5 is not interfered by other components, and the detection result can be more accurate.
Referring to fig. 1 and fig. 3, as an embodiment of the apparatus for detecting sealing pressure resistance of an acoustic pipe for a bored concrete pile according to the present invention, an end cover assembly 2 includes an end cover body 21 and a tightening assembly 24. The end cover body 21 is positioned at the opening at the top end of the sealed container 1 and used for plugging the inner cavity 10; the tightly-pushing assembly 24 is disposed between the end cover body 21 and the sealed container 1, and is respectively abutted against the upper surface of the end cover body 21 and the side wall of the sealed container 1, so as to tightly push the end cover body 21 against the top end opening of the sealed container 1.
In the prior art, the flange plate 6 is used for plugging the sealed container 1, as shown in fig. 4, the flange plate 6 is connected with the sealed container 1 by bolts, and a plurality of bolts are mounted on the flange plate 6 to ensure the tightness of the flange plate 6, so that the workload of assembling the flange plate 6 and the sealed container 1 is increased undoubtedly, and the detection efficiency is reduced.
The invention uses the end cap body 21 to seal the sealed container 1, and the end cap body 21 is pressed on the top opening of the sealed container 1 by the tightening component 24. The tightening assembly 24 is manually operated, so that the opening or closing of the end cap body 21 can be conveniently and quickly completed.
In order to increase the tightening effect, a connecting portion 15 protruding outward in the radial direction is provided at the top end of the hermetic container 1, and a tightening member 24 abuts against the bottom wall of the connecting portion 15.
Specifically, the jacking assembly 24 includes a jacking housing 241, an I-shaped jacking member 242, and a cam 244.
The tightly-pushing shell 241 is provided with a containing groove 2410 and a containing cavity 2411 which is communicated with the containing groove 2410 and is positioned above the containing groove 2410, and the opening of the containing groove 2410 faces the end cover assembly 2; the bottom wall of the accommodation groove 2410 abuts against the outer peripheral surface of the connection portion 15 and the outer peripheral surface of the end cover body 21, and the lower groove side wall of the accommodation groove 2410 abuts against the lower surface of the connection portion 15. Specifically, a partition 2412 is arranged in the tightening housing 241, the partition 2412 divides the cavity of the tightening housing 241 into an accommodating groove 2410 and an accommodating cavity 2411, and since the accommodating cavity 2411 needs to contain components such as the cam 244 and the i-shaped tightening piece 242, in order to avoid the components from being polluted by the external environment, the accommodating cavity 2411 is designed into a rectangular cavity structure with cavity walls on six surfaces.
The lower surface of the I-shaped top fastening piece 242 abuts against the upper surface of the end cover body 21, and the upper portion of the I-shaped top fastening piece upwards penetrates through the accommodating groove 2410 and is arranged in the accommodating cavity 2411; a jacking spring 243 arranged along the up-down direction is arranged between the upper part of the I-shaped jacking piece 242 and the cavity wall of the accommodating cavity 2411 (namely the upper surface of the partition plate 2412).
The cam 244 is located in the accommodating cavity 2411, and is connected with a handle 245, one end of the handle 245 is connected with the cam 244, and the other end penetrates through the tightening housing 241.
Of course, in order to make the sealing performance of the end cap body 21 and the sealed container 1 more excellent, at least two tightening assemblies 24 are provided at intervals along the circumferential direction of the end cap body 21 in the present embodiment.
The operation of the tightening unit 24 of the present embodiment is as follows:
by pressing down or pulling up the handle 245, the cam 244 can be rotated, and different portions of the cam 244 contact the i-shaped urging member 242, so that the pressing distance of the i-shaped urging member 242 to the cap body 21, that is, the pressing force of the cap body 21 to the sealed container 1 can be changed.
When the handle 245 is pressed or pulled, the maximum outer diameter part of the cam 244 is contacted with the upper surface of the I-shaped top clamping piece 242, the cam 244 presses down the I-shaped top clamping piece 242 and the end cover body 21, and the end cover body 21 is tightly buckled at the top opening of the sealed container 1; when the handle 245 is pressed or pulled again, the minimum outer diameter part of the cam 244 is in contact with the upper surface of the i-shaped propping member 242, and the contact distance between the center point of the cam 244 and the upper surface of the i-shaped propping member 242 is reduced, the i-shaped propping member 242 can move upwards under the driving of the propping spring 243, so that the end cap body 21 is driven to move upwards, and the airtight connection between the end cap body 21 and the sealed container 1 is released. After the tightening component 24 is removed, the end cover body 21 can be removed.
When the end cover body 21 is buckled, the end cover body 21 and the sealed container 1 can be hermetically connected only by placing the end cover body 21 at the top end of the sealed container 1, then clamping the jacking assembly 24 between the end cover body 21 and the connecting part 15, and finally pulling the handle 245; when the end cover body 21 is removed, the handle 245 is firstly pulled to remove the airtight connection between the end cover body 21 and the sealed container 1, then the jacking assembly 24 is removed, and finally the end cover body 21 can be removed. The dismounting process does not use bolts, so that the assembly time is greatly shortened, the workload is reduced, and the detection efficiency is improved.
In addition, the structure and the position of the cam 244, the I-shaped jacking piece 242 and the partition plate 2412 are skillfully utilized, so that the jacking assembly 24 has a simple structure and is convenient to operate.
In order to further increase the sealing performance between the end cover body 21 and the sealed container 1, please refer to fig. 3, as a specific embodiment of the device for detecting the sealing pressure resistance of the acoustic pipe for a bored concrete pile according to the present invention, the lower surface of the end cover body 21 is provided with a press-fitting portion 22 and a clamping portion 23 which are sequentially connected from top to bottom; the outer edge of the end cover body 21 protrudes radially outward relative to the press-fitting portion 22, and the outer edge of the press-fitting portion 22 protrudes radially outward relative to the snap-fit portion 23; the elastic pad 3 is disposed on the lower surface of the catching portion 23.
The top end of the sealed container 1 is provided with a connecting part 15 which protrudes outwards along the radial direction, the connecting part 15 is also provided with an annular press-fitting groove 150, and the press-fitting groove 150 is arranged by penetrating through the inner side wall and the top wall of the connecting part 15.
When the tightening assembly 24 tightens the end cap body 21 against the sealed container 1, the lower surface of the portion of the end cap body 21 protruding out of the press-fitting portion 22 abuts against the upper surface of the connecting portion 15; the peripheral surface of the press-fitting part 22 is abutted against the groove side wall of the press-fitting groove 150, and the lower surface of the part of the press-fitting part 22 protruding out of the clamping part 23 is abutted against the groove bottom wall of the press-fitting groove 150; the outer peripheral surface of the engagement portion 23 abuts against the inner wall surface of the sealed container 1.
Specifically, the upper surface of the press fitting portion 22 is coplanar with the upper surface of the connecting portion 15, and a sealing gasket 25 is further disposed between the press fitting portion 22 and the end cover body 21, and between the connecting portion 15 and the end cover body 21. A second sealing washer 26 is provided between the press-fitting portion 22 and the bottom wall of the press-fitting groove 150.
The invention also provides a method for detecting the sealing pressure resistance of the acoustic pipe for the cast-in-place pile, which comprises the following steps:
s1: placing the sounding pipe 5 in the sounding pipe sealing pressure resistance detection device for the cast-in-place pile, and connecting a bottom plate 51 of the sounding pipe 5 with the lifting table 42 or the oil-filled shell 41;
s2: the end cover component 2 is hermetically connected to the opening at the top end of the sealed container 1;
s3: hydraulic oil is continuously introduced into the oil-filled cavity 410 through the oil pipeline 43, the hydraulic oil pushes the lifting platform 42 and the oil-filled shell 41 to move upwards until the other end of the sounding pipe 5 is in close contact with the elastic gasket 3;
s4: pressurizing the inside of the sealed container 1 through a pressurizing port 11, so that the internal pressure of the sealed container 1 is twice of the designed maximum working pressure of the sounding pipe 5 and is kept for 1 min;
s5: observing whether the hydraulic oil leakage phenomenon occurs at the air vent 20; if no leakage exists, the sound testing pipe 5 is in accordance with the requirement of the external pressure test, otherwise, the sound testing pipe is not in accordance with the requirement of the external pressure test.
According to the method for detecting the sealing pressure resistance of the acoustic pipe for the cast-in-place pile, the acoustic pipe 5 is subjected to sealing external pressure resistance detection by using the device for detecting the sealing pressure resistance of the acoustic pipe for the cast-in-place pile, so that the workload of the airtight connection of the acoustic pipe 5, the sealed container 1 and the end cover assembly 2 can be reduced, and the detection efficiency can be improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. Bored concrete pile is with sound detection pipe sealing pressure resistance detection device, its characterized in that includes:
the inner cavity of the sealed container is used for containing hydraulic oil, and the top end of the sealed container is provided with an opening; the sealed container is also provided with a pressurizing port communicated with the inner cavity and a pressure gauge for monitoring the pressure of the inner cavity;
the end cover assembly is connected to the opening at the top end of the sealed container in a sealing mode, an elastic gasket is arranged on the lower surface of the end cover assembly and is used for being in sealing abutting joint with one end of the sounding pipe; the end cover assembly and the elastic gasket are also provided with air vents communicated with the interior of the sounding pipe;
the hydraulic lifting mechanism is arranged in the inner cavity and positioned below the elastic gasket, and comprises an oil-filled shell and a lifting platform positioned in the oil-filled shell; the oil-filled shell is provided with an oil-filled cavity for containing hydraulic oil, and is also connected with an oil pipeline which is communicated with the oil-filled cavity and penetrates through the side wall of the sealed container; the lifting platform or the oil-filled shell is used for being abutted against the other end of the sounding pipe;
when the oil filling cavity is continuously filled with hydraulic oil through the oil pipeline, the lifting platform and the oil filling shell are pushed by the hydraulic oil to move upwards until the end part of the sounding pipe is in airtight abutting joint with the elastic gasket.
2. The apparatus for detecting the sealing pressure resistance of an acoustic pipe for a bored concrete pile according to claim 1, wherein the oil-filled casing includes a first casing and a second casing located below the first casing;
the first shell is made of a telescopic material, and the top of the first shell is closed; a lifting plate is arranged in the first shell; the lifting platform is positioned in the first shell, the bottom end of the lifting platform is connected with the lifting plate, and the top end of the lifting platform is connected with the inner wall of the top of the first shell; the outer wall of the top of the first shell is abutted against the end part of the sounding pipe;
the second shell, the part of the first shell, which is positioned below the lifting plate, and the lifting plate enclose the oil-filled cavity; the oil line is connected to the second housing.
3. The apparatus for detecting the sealing pressure resistance of an acoustic pipe for a bored concrete pile according to claim 2, wherein the elevating platform includes:
the bottom end of the lifting shell is fixedly connected with the lifting plate, and the top end of the lifting shell is provided with an opening;
the cover plate is connected to the opening at the top end of the lifting shell and is connected with the inner wall of the top of the first shell;
an elastic piece is arranged in the lifting shell, the bottom end of the elastic piece is abutted against the bottom wall of the lifting shell, and the top end of the elastic piece is abutted against the cover plate; the elastic piece is used for buffering the downward pulling force of the sounding pipe when the lifting platform and the first shell fall downwards.
4. A device for detecting the sealing pressure resistance of an acoustic pipe for a bored concrete pile according to claim 3, wherein an annular connection plate is further provided between the elevating casing and the cover plate, and a first sealing washer is fitted in the annular connection plate.
5. The apparatus for detecting the sealing pressure resistance of an acoustic pipe for a cast-in-place pile according to claim 2, wherein the top outer wall of the first casing abuts against the end of the acoustic pipe through an abutting block; the abutting block is used for abutting against the central part of the sounding pipe;
and a supporting plate for enabling the sounding pipe to penetrate through and supporting the sounding pipe is further arranged in the inner cavity.
6. An apparatus for testing the sealing pressure resistance of an acoustic pipe for a bored concrete pile according to claim 1, wherein the end cap assembly includes:
the end cover body is positioned at the opening at the top end of the sealed container and used for plugging the inner cavity; and
and the tightly-pushing assembly is arranged between the end cover body and the sealed container, is respectively abutted against the upper surface of the end cover body and the side wall of the sealed container, and is used for tightly pushing the end cover body at the top end opening of the sealed container.
7. The apparatus for testing the sealing pressure resistance of an acoustic pipe for a bored concrete pile according to claim 6, wherein the lower surface of the end cap body is provided with a press-fitting portion and a clamping portion which are connected in sequence from top to bottom; the outer edge of the end cover body protrudes outwards in the radial direction relative to the press-fitting part, and the outer edge of the press-fitting part protrudes outwards in the radial direction relative to the clamping part; the elastic gasket is arranged on the lower surface of the clamping part;
the top end of the sealed container is provided with a connecting part which protrudes outwards along the radial direction, and the connecting part is also provided with an annular press-mounting groove;
the lower surface of the part of the end cover body, which protrudes out of the press-mounting part, is abutted against the upper surface of the connecting part; the outer peripheral surface of the press-mounting part is abutted against the side wall of the press-mounting groove, and the lower surface of the part of the press-mounting part, which protrudes out of the clamping part, is abutted against the bottom wall of the press-mounting groove; the outer peripheral surface of the clamping portion abuts against the inner wall surface of the sealed container.
8. The apparatus for testing the sealing pressure resistance of an acoustic pipe for a bored concrete pile according to claim 7, wherein the upper surface of the press-fitting portion is coplanar with the upper surface of the connecting portion, and sealing gaskets are further provided between the press-fitting portion and the end cap body;
and a second sealing washer is arranged between the press-mounting part and the bottom wall of the press-mounting groove.
9. The acoustic pipe sealing pressure resistance detection apparatus for a bored concrete pile according to claim 7, wherein at least two of the abutting assemblies are provided at intervals in a circumferential direction of the end cover body; the tight subassembly in top includes:
the abutting shell is provided with an accommodating groove and an accommodating cavity which is communicated with the accommodating groove and is positioned above the accommodating groove, and the opening of the accommodating groove faces the end cover assembly; the bottom wall of the accommodating groove is abutted against the outer peripheral surface of the connecting part and the outer peripheral surface of the end cover body, and the lower groove side wall of the accommodating groove is abutted against the lower surface of the connecting part;
the lower surface of the I-shaped jacking piece is abutted against the upper surface of the end cover body, and the upper part of the I-shaped jacking piece upwards penetrates through the accommodating groove and is arranged in the accommodating cavity; a jacking spring arranged along the up-down direction is arranged between the upper part of the I-shaped jacking piece and the cavity wall of the accommodating cavity; and
the cam is located in the containing cavity and connected with a handle, and the handle penetrates out of the jacking shell.
10. The method for detecting the sealing pressure resistance of the acoustic pipe for the cast-in-place pile is characterized by comprising the following steps of:
placing a sounding pipe in the sounding pipe sealing pressure resistance detection device for the cast-in-place pile according to any one of claims 1 to 9, and connecting one end of the sounding pipe with the lifting platform or the oil-filled shell;
hermetically connecting the end cover assembly to the top end opening of the sealed container;
hydraulic oil is continuously introduced into the oil-filled cavity through the oil pipeline, the hydraulic oil pushes the lifting platform and the oil-filled shell to move upwards until the other end of the sounding pipe is in close abutting joint with the elastic gasket;
pressurizing the inside of the sealed container through a pressurizing port, so that the internal pressure of the sealed container is twice of the designed maximum working pressure of the sounding pipe and is kept for 1 min;
observing whether the vent hole leaks the hydraulic oil; if no leakage exists, the sound testing pipe is in accordance with the requirement of the external pressure test, otherwise, the sound testing pipe is not in accordance with the requirement of the external pressure test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010820367.3A CN111827376A (en) | 2020-08-14 | 2020-08-14 | Device and method for detecting sealing pressure resistance of acoustic pipe for cast-in-place pile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010820367.3A CN111827376A (en) | 2020-08-14 | 2020-08-14 | Device and method for detecting sealing pressure resistance of acoustic pipe for cast-in-place pile |
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| CN111827376A true CN111827376A (en) | 2020-10-27 |
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| CN202010820367.3A Pending CN111827376A (en) | 2020-08-14 | 2020-08-14 | Device and method for detecting sealing pressure resistance of acoustic pipe for cast-in-place pile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112796312A (en) * | 2020-12-31 | 2021-05-14 | 郑州大学建设工程质量研究检测有限公司 | Spiral drilling pouring pile forming structure for CFG pile |
-
2020
- 2020-08-14 CN CN202010820367.3A patent/CN111827376A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112796312A (en) * | 2020-12-31 | 2021-05-14 | 郑州大学建设工程质量研究检测有限公司 | Spiral drilling pouring pile forming structure for CFG pile |
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