CN108827576B - Low-amplitude low-frequency horizontal vibration test device - Google Patents
Low-amplitude low-frequency horizontal vibration test device Download PDFInfo
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- CN108827576B CN108827576B CN201811065009.5A CN201811065009A CN108827576B CN 108827576 B CN108827576 B CN 108827576B CN 201811065009 A CN201811065009 A CN 201811065009A CN 108827576 B CN108827576 B CN 108827576B
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- 230000005540 biological transmission Effects 0.000 claims abstract description 33
- 238000007789 sealing Methods 0.000 claims abstract description 31
- 230000000149 penetrating effect Effects 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims 2
- 239000003638 chemical reducing agent Substances 0.000 claims 1
- 210000001503 joint Anatomy 0.000 claims 1
- 238000001514 detection method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/06—Multidirectional test stands
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Abstract
The invention relates to a low-amplitude low-frequency horizontal vibration test device which is provided with a test bed, a clamping device, a transverse vibration device and an end sealing device, wherein the clamping device comprises a first clamping device, a second clamping device and a third clamping device, the first clamping device and the second clamping device can fix a first pipe fitting on the table top of the test bed in an axially extending mode, the third clamping device can fix the pipe fitting on the table top of the test bed in an axially extending mode, and the first pipe fitting and the second pipe fitting are flexibly connected; the transverse vibration device further comprises a transverse vibration base and a transverse driving transmission device, wherein the transverse driving transmission device can drive one end of the transverse vibration base to horizontally rotate and drive the other end of the transverse vibration base to transversely vibrate along a first track hole formed in the test bed. The low-amplitude low-frequency horizontal vibration test device provided by the invention can be well used for detecting the sealing performance of the flexible interface between the first pipe fitting and the second pipe fitting.
Description
Technical Field
The invention relates to the field of vibration test tables, in particular to a low-amplitude low-frequency horizontal vibration test device.
Background
In the new standard implementation of GB/T12772-2016 flexible joint cast iron pipe, pipe fitting and accessories for drainage, a detection project is added, and a detection mechanism must be equipped with new detection test equipment, including vibration detection test.
However, most vibration test equipment is a vibration test bed with large amplitude and high frequency, but the vibration test bed does not meet the practical requirements for flexible joint cast iron pipes, pipe fittings, accessories and the like for drainage, which need low amplitude and low frequency.
Disclosure of Invention
The present invention has been made in view of the above-described problems, and an object thereof is to provide a low-amplitude low-frequency horizontal vibration test apparatus for solving the above-described problems.
The invention is realized by adopting the following technical scheme:
the invention of the first technical scheme is a low-amplitude low-frequency horizontal vibration test device which is used for detecting the sealing performance of a flexible interface between a first pipe fitting and a second pipe fitting and is provided with a test bed and an end sealing device used for sealing the end of the first pipe fitting or the end of the second pipe fitting.
Taking one direction in the horizontal plane of the test bed as a transverse direction, and taking the direction perpendicular to the transverse direction in the horizontal plane as an axial direction:
the low-amplitude low-frequency horizontal vibration test device is further provided with a clamping device and a transverse vibration device, and the clamping device comprises a first clamping device, a second clamping device and a third clamping device.
The first clamping device and the second clamping device can clamp and fix the first pipe fitting on the table top of the test table in an axially extending mode, the third clamping device can clamp and fix the second pipe fitting on the table top of the test table in an axially extending mode, and the first pipe fitting and the second pipe fitting are flexibly connected;
the transverse vibration device further comprises a transverse vibration base and a transverse driving transmission device, one end of the upper surface of the transverse vibration base is connected with the lower surface of the first clamping device along the axial direction, the other end of the upper surface of the transverse vibration base is connected with the lower surface of the second clamping device, and the transverse driving transmission device can drive one end of the transverse vibration base to horizontally rotate and drive the other end of the transverse vibration base to transversely vibrate along a first track hole formed in the test bed.
In addition, the low-amplitude low-frequency horizontal vibration test device of the second technical scheme is characterized in that on the basis of the low-amplitude low-frequency horizontal vibration test device of the first technical scheme, the transverse driving transmission device comprises a first gear motor and a crank rocker mechanism arranged in the test bed, two ends of the transverse vibration base are respectively connected with the crank rocker mechanism through connecting rods penetrating through the table top of the test bed along the axis direction, the first gear motor can drive the crank rocker mechanism to move, so that one end of the transverse vibration base is driven to horizontally rotate and the other end of the transverse vibration base is driven to transversely vibrate along a first track hole formed in the test bed.
In addition, the low-amplitude low-frequency horizontal vibration test device according to the third technical scheme is characterized in that on the basis of the low-amplitude low-frequency horizontal vibration test device according to the first or second technical scheme, the low-amplitude low-frequency horizontal vibration test device is further provided with an axial vibration device, the axial vibration device comprises an axial guiding vibration table and an axial driving transmission device, the upper surface of the axial guiding vibration table is connected with the lower surface of the third clamping device, and the axial driving transmission device can drive the axial guiding vibration table to vibrate axially along a second track hole formed in the test table.
In addition, the low-amplitude low-frequency horizontal vibration test device according to the fourth technical scheme is characterized in that on the basis of the low-amplitude low-frequency horizontal vibration test device according to the third technical scheme, the axial driving transmission device comprises a second gear motor and a crank block mechanism arranged in the test bench, the axial guiding vibration bench is connected with a slide block of the crank block mechanism through a connecting rod penetrating through a table top of the test bench, the second gear motor can drive the crank block mechanism to move, and the axial guiding vibration bench is driven to vibrate axially along a second track hole formed in the test bench.
In addition, the low-amplitude low-frequency horizontal vibration test device according to the fifth technical scheme is characterized in that on the basis of the low-amplitude low-frequency horizontal vibration test device according to the fourth technical scheme, the crank of the crank slider mechanism is an eccentric crank with adjustable eccentricity, the eccentric crank comprises a crank, an inner eccentric wheel, an outer eccentric wheel and a locking pin, the rotation center of the inner eccentric wheel is different from that of the outer eccentric wheel, the output shaft of the second gear motor, the inner eccentric wheel, the outer eccentric wheel and the crank are sequentially connected, and the locking pin is arranged between the inner eccentric wheel and the outer eccentric wheel and is used for locking the relative position between the outer eccentric wheel and the inner eccentric wheel.
In addition, according to a sixth technical aspect, based on the low-amplitude low-frequency horizontal vibration test device according to the first technical aspect, the end sealing device includes an end connection pipe with one end sealed, the other end connected with a first flange, a second flange butt-jointed with the first flange, a sealing gasket arranged between the first flange and the second flange, and a connecting piece for connecting the first flange and the second flange.
In addition, the low-amplitude low-frequency horizontal vibration test device according to the seventh technical scheme is characterized in that on the basis of the low-amplitude low-frequency horizontal vibration test device according to the first technical scheme, the first clamping device, the second clamping device and the third clamping device have the same structure, the first clamping device, the second clamping device and the third clamping device are respectively provided with a lower clamping seat and an upper clamping seat, and a clamping space capable of clamping the first pipe fitting or the second pipe fitting is formed between the upper clamping seat and the lower clamping seat.
In addition, in the low-amplitude low-frequency horizontal vibration test device according to the eighth aspect, on the basis of the low-amplitude low-frequency horizontal vibration test device according to the seventh aspect, the upper holder is connected to the lower holder through a height adjusting assembly that can adjust the height of the upper holder.
In addition, in the ninth technical means of the low-amplitude low-frequency horizontal vibration test apparatus, on the basis of the eighth technical means of the low-amplitude low-frequency horizontal vibration test apparatus, the height adjusting assembly includes a bolt and a nut,
the height adjusting assembly is used for fixing the upper clamping seat on the lower clamping seat in a mode that the rod part of the bolt sequentially penetrates through the lower clamping seat and the upper clamping seat and then is locked by the nut.
In addition, in the low-amplitude low-frequency horizontal vibration test device according to the tenth aspect, on the basis of the low-amplitude low-frequency horizontal vibration test device according to the seventh aspect, an inverted V-shaped upper notch is formed on the lower surface of the upper holder, a V-shaped lower notch is formed on the upper surface of the lower holder, and the upper notch and the lower notch correspond to each other to form the fastening space.
Compared with the prior art, the invention has the following beneficial effects.
The invention provides a low-amplitude low-frequency horizontal vibration test device which is used for detecting the sealing performance of a flexible interface between a first pipe fitting and a second pipe fitting and is provided with a test bed and an end sealing device used for sealing the end of the first pipe fitting or the end of the second pipe fitting.
Taking one direction in the horizontal plane of the test bed as a transverse direction, and taking the direction perpendicular to the transverse direction in the horizontal plane as an axial direction:
the low-amplitude low-frequency horizontal vibration test device is also provided with a clamping device and a transverse vibration device.
The clamping device comprises a first clamping device, a second clamping device and a third clamping device.
The first clamping device and the second clamping device can clamp and fix the first pipe fitting on the table top of the test bed in an axially extending mode, and the third clamping device can clamp and fix the second pipe fitting on the table top of the test bed in an axially extending mode, and the first pipe fitting and the second pipe fitting are flexibly connected;
the transverse vibration device also comprises a transverse vibration base and a transverse driving transmission device,
along the axial direction, one end of the upper surface of the transverse vibration base is connected with the lower surface of the first clamping device, and the other end of the upper surface of the transverse vibration base is connected with the lower surface of the second clamping device.
The transverse driving transmission device can drive one end of the transverse vibration base to horizontally rotate and drive the other end of the transverse vibration base to transversely vibrate along a first track hole formed in the test bed.
The low-amplitude low-frequency horizontal vibration test device provided by the invention can be well used for detecting the sealing performance of the flexible interface between the first pipe fitting and the second pipe fitting, and meets the national requirements for vibration detection tests.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view showing the overall structure of a low-amplitude low-frequency horizontal vibration test apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic diagram showing the structure of an eccentric crank of a low-amplitude low-frequency horizontal vibration test apparatus according to an embodiment of the present invention;
FIG. 3 is a schematic view showing the structure of an end seal device of a low-amplitude low-frequency horizontal vibration test apparatus according to an embodiment of the present invention;
fig. 4 is a schematic structural view showing a clamping device of a low-amplitude low-frequency horizontal vibration test device according to an embodiment of the present invention.
Reference numerals: 1-a test bed; 2-end sealing means; 201-end connection tube; 202-a connector; 203-a gasket; 204-a first flange; 205-a second flange; 3-sliding bearings; 41-a first clamping device; 42-a second clamping device; 43-a third clamping device; 401-lower clamping seat; 402-a height adjustment assembly; 403-upper clamp seat; 5-a transverse vibration base; 6-a first tube; 7-a transverse drive transmission; 8-a second tube; 9-axially pulling the vibrating table; 10-an axial drive transmission; 1001-locking pins; 1002-inner eccentric; 1003-outer eccentric.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the positional or positional relationship indicated by the terms such as "upper", "lower", "vertical", "horizontal", "inner", "outer", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The following describes specific embodiments of the overall structure of the low-amplitude low-frequency horizontal vibration test apparatus according to the present invention.
FIG. 1 is a schematic view showing the overall structure of a low-amplitude low-frequency horizontal vibration test apparatus according to an embodiment of the present invention; FIG. 2 is a schematic diagram showing the structure of an eccentric crank of a low-amplitude low-frequency horizontal vibration test apparatus according to an embodiment of the present invention; FIG. 3 is a schematic view showing the structure of an end seal device of a low-amplitude low-frequency horizontal vibration test apparatus according to an embodiment of the present invention; fig. 4 is a schematic structural view showing a clamping device of a low-amplitude low-frequency horizontal vibration test device according to an embodiment of the present invention.
As shown in fig. 1 to 4, the present embodiment provides a low-amplitude low-frequency horizontal vibration test apparatus for detecting the sealing performance of a flexible interface between a first pipe member 6 and a second pipe member 8, which has a test stand 1 and an end sealing device 2 for sealing an end of the first pipe member 6 or the second pipe member 8, with one direction in the horizontal plane of the test stand 1 being a lateral direction.
The direction perpendicular to the transverse direction in the horizontal plane is taken as the axial direction:
the low-amplitude low-frequency horizontal vibration test device is further provided with a clamping device and a transverse vibration device, the clamping device comprises a first clamping device 41, a second clamping device 42 and a third clamping device 43, the first clamping device 41 and the second clamping device 42 can clamp and fix the first pipe fitting 6 on the table top of the test table 1 in an axially extending mode, the third clamping device 43 can clamp and fix the second pipe fitting 8 on the table top of the test table 1 in an axially extending mode, and the first pipe fitting 6 and the second pipe fitting 8 are flexibly connected;
the transverse vibration device further comprises a transverse vibration base 5 and a transverse driving transmission device 7, one end of the upper surface of the transverse vibration base 5 is connected with the lower surface of the first clamping device 41 along the axial direction, the other end of the upper surface of the transverse vibration base 5 is connected with the lower surface of the second clamping device 42, and the transverse driving transmission device 7 can drive one end of the transverse vibration base 5 to horizontally rotate and drive the other end of the transverse vibration base 5 to transversely vibrate along a first track hole formed in the test bench 1.
Further, the transverse driving transmission device 7 comprises a first gear motor and a crank and rocker mechanism arranged in the test bed 1, and two ends of the transverse vibration base 5 are respectively connected with the crank and rocker mechanism through connecting rods penetrating through the table top of the test bed 1 along the axis direction.
Specifically, the portion of the connecting rod passing through the table top of the test stand 1 is provided with a sliding bearing 3.
The first speed reducing motor can drive the crank rocker mechanism to move, so that one end of the transverse vibration base 5 is driven to horizontally rotate and the other end of the transverse vibration base 5 is driven to transversely vibrate along a first track hole formed in the test bed 1.
In addition, the low-amplitude low-frequency horizontal vibration test device is further provided with an axial vibration device, the axial vibration device comprises an axial drawing vibration table 9 and an axial driving transmission device 10, the upper surface of the axial drawing vibration table 9 is connected with the lower surface of the third clamping device 43, and the axial driving transmission device 10 can drive the axial drawing vibration table 9 to axially vibrate along a second track hole formed in the test table 1.
Further, the axial driving transmission device 10 comprises a second gear motor and a crank block mechanism arranged in the test bed 1, the axial guiding vibration table 9 is connected with a slide block of the crank block mechanism through a connecting rod penetrating through the table top of the test bed 1, and the second gear motor can drive the crank block mechanism to move, so that the axial guiding vibration table 9 is driven to vibrate axially along a second track hole formed in the test bed 1.
Further, the crank of the crank slider mechanism is an eccentric crank with adjustable eccentricity, the eccentric crank comprises a crank, an inner eccentric wheel 1002, an outer eccentric wheel 1003 and a locking pin 1001, the rotation centers of the inner eccentric wheel 1002 and the outer eccentric wheel 1003 are different, an output shaft of the second speed reducing motor, the inner eccentric wheel 1002, the outer eccentric wheel 1003 and the crank are sequentially connected, and the locking pin 1001 is arranged between the inner eccentric wheel 1002 and the outer eccentric wheel 1003 and is used for locking the relative position between the outer eccentric wheel 1003 and the inner eccentric wheel 1002.
In addition, the end seal device 2 includes an end connection pipe 201 having one end plugged and the other end connected to a first flange 204, a second flange 205 butted against the first flange 204, a gasket 203 provided between the first flange 204 and the second flange 205, and a connection member 202 for connecting the first flange 204 and the second flange 205.
Specifically, the connector 202 is a bolt.
In addition, the first clamping device 41, the second clamping device 42 and the third clamping device 43 have the same structure, and the first clamping device 41, the second clamping device 42 and the third clamping device 43 respectively have a lower clamping seat 401 and an upper clamping seat 403, and a clamping space capable of clamping the first pipe fitting 6 or the second pipe fitting 8 is formed between the upper clamping seat 403 and the lower clamping seat 401.
Further, the upper holder 403 is connected to the lower holder 401 by a height adjusting assembly 402 capable of adjusting the height of the upper holder 403.
Further, the height adjusting assembly 402 includes a bolt and a nut, and the height adjusting assembly 402 fixes the upper holder 403 to the lower holder 401 in such a manner that a shaft portion of the bolt sequentially passes through the lower holder 401 and the upper holder 403 and is then locked by the nut.
In addition, an inverted V-shaped upper notch is formed on the lower surface of the upper holder 403, a V-shaped lower notch is formed on the upper surface of the lower holder 401, and the upper notch and the lower notch correspond to each other to form a fastening space.
In the above-described overall embodiment, the transverse vibration device and the axial vibration device are operated at the same time, and only one of them is operated.
The specific structure of the present invention is described above, and the mode of use thereof is described below.
When the device is used, the first pipe fitting is flexibly connected with the second pipe fitting, specifically, the flexible connection can be realized through flexible connection, then, the port of the second pipe fitting is sealed by the end sealing device, water is injected from the port of the first pipe fitting to the inside until the water surface is flush with the port surface of the first pipe fitting, then, the port of the first pipe fitting is sealed by the end sealing device, then, the first pipe fitting is horizontally fixed on a test bench through the first clamping device and the second clamping device, the second pipe fitting is horizontally fixed on the test bench through the third clamping device, and finally, the transverse vibration device is operated to observe the flexible interface between the first pipe fitting and the second pipe fitting.
If water seeps out from the flexible interface part, the sealing performance of the flexible interface is poor; if no water seeps out from the flexible joint part, the sealing performance of the flexible joint is good.
In addition, in the above specific embodiment, the transverse driving transmission device includes a first gear motor and a crank-rocker mechanism mounted in the test stand, and two ends of the transverse vibration base are respectively connected with the crank-rocker mechanism along the axial direction through connecting rods penetrating through the table top of the test stand, and the first gear motor can drive the crank-rocker mechanism to move, so that one end of the transverse vibration base is driven to horizontally rotate and the other end of the transverse vibration base is driven to transversely vibrate along a first track hole formed in the test stand.
Through this structure, reach the purpose of horizontal low frequency vibration first pipe fitting.
In addition, in the specific embodiment, the low-amplitude low-frequency horizontal vibration test device further comprises an axial vibration device, the axial vibration device comprises an axial guiding vibration table and an axial driving transmission device, the upper surface of the axial guiding vibration table is connected with the lower surface of the third clamping device, and the axial driving transmission device can drive the axial guiding vibration table to vibrate axially along the second track hole formed in the test table.
The axial driving transmission device comprises a second speed reducing motor and a crank block mechanism arranged in the test bed, the axial guiding vibration table is connected with a slide block of the crank block mechanism through a connecting rod penetrating through the table top of the test bed, and the second speed reducing motor can drive the crank block mechanism to move so as to drive the axial guiding vibration table to vibrate axially along a second track hole formed in the test bed.
Through the structure, the purpose of axially pulling and vibrating the second pipe fitting at low frequency is achieved.
In addition, in the above-mentioned concrete embodiment, the crank of slider-crank mechanism is the eccentric crank of adjustable eccentric distance, and eccentric crank includes crank, interior eccentric wheel, outer eccentric wheel and locking pin, and interior eccentric wheel is different with the rotation center of outer eccentric wheel, and output shaft, interior eccentric wheel, outer eccentric wheel and the crank of second gear motor connect gradually, and the locking pin sets up between interior eccentric wheel and outer eccentric wheel for lock the relative position between outer eccentric wheel and the interior eccentric wheel.
With the structure, the axial driving transmission device can adjust the vibration amplitude, and the axial amplitude modulation driving vibration device is formed.
In addition, in the above embodiment, the end sealing device includes an end connection pipe having one end sealed and the other end connected to the first flange, a second flange butted with the first flange, a gasket provided between the first flange and the second flange, and a connection member for connecting the first flange and the second flange.
Through such structure, reach the purpose that end sealing device can seal the tip of first pipe fitting or this second pipe fitting, avoid causing the influence to the monitoring result, improve experimental accuracy.
In addition, in the above specific embodiment, the first clamping device, the second clamping device and the third clamping device have the same structure, and the first clamping device, the second clamping device and the third clamping device respectively have a lower clamping seat and an upper clamping seat, and a clamping space capable of clamping the first pipe fitting or the second pipe fitting is formed between the upper clamping seat and the lower clamping seat.
Through such structure, make things convenient for the fixed and dismantlement of first pipe fitting and second pipe fitting on the test bench.
In addition, in the above-described embodiment, the upper holder is connected to the lower holder through a height adjusting assembly capable of adjusting the height of the upper holder.
Through this structure, be favorable to carrying out the test to the pipe fitting of different thickness degree.
In addition, in the above-described embodiment, the height adjusting assembly includes a bolt and a nut, and the height adjusting assembly fixes the upper holder to the lower holder in such a manner that a shaft portion of the bolt sequentially passes through the lower holder and the upper holder and is then locked by the nut.
Through the structure, the purpose of adjusting the height of the upper clamping seat is achieved.
In addition, in the above embodiment, an inverted V-shaped upper notch is formed on the lower surface of the upper holder, a V-shaped lower notch is formed on the upper surface of the lower holder, and the upper notch and the lower notch correspond to each other to form a fastening space.
Through such structure, be favorable to fixed firm with first pipe fitting and second pipe fitting on the test bench.
In the above embodiment, the specific configuration of the present invention has been described, but the present invention is not limited to this.
For example, in the above-mentioned specific embodiment, the transverse driving transmission device includes a first gear motor and a crank-rocker mechanism mounted inside the test stand, and two ends of the transverse vibration base are respectively connected with the crank-rocker mechanism along the axial direction through connecting rods penetrating the table top of the test stand, and the first gear motor can drive the crank-rocker mechanism to move, so that one end of the transverse vibration base is driven to horizontally rotate and the other end of the transverse vibration base is driven to transversely vibrate along a first track hole formed in the test stand.
However, the invention is not limited thereto, and the first gear motor may be omitted, and a revolving cylinder may be additionally provided to drive the crank-rocker mechanism to move, so that the purpose of vibrating the first pipe transversely at a low frequency may be achieved.
In addition, in the specific embodiment, the low-amplitude low-frequency horizontal vibration test device is further provided with an axial vibration device, the axial vibration device comprises an axial guiding vibration table and an axial driving transmission device, the upper surface of the axial guiding vibration table is connected with the lower surface of the third clamping device, and the axial driving transmission device can drive the axial guiding vibration table to vibrate axially along the second track hole formed in the test table.
However, the sealing performance of the flexible interface between the first pipe fitting and the second pipe fitting can be monitored only by transverse vibration without providing the axial vibration device, but according to the specific embodiment, the axial low-frequency vibration of the second pipe fitting can be generated by providing the axial vibration device, so that the test effect is more obvious, and the test result is more convincing.
In addition, in the specific embodiment, the axial driving transmission device comprises a second gear motor and a crank block mechanism arranged in the test bed, the axial guiding vibration bed is connected with a slide block of the crank block mechanism through a connecting rod penetrating through the table top of the test bed, and the second gear motor can drive the crank block mechanism to move, so that the axial guiding vibration bed is driven to vibrate axially along a second track hole formed in the test bed.
However, the invention is not limited thereto, but the second gear motor may be omitted, and a telescopic cylinder may be additionally provided to drive the slider-crank mechanism to reciprocate, so that the function of axially low-frequency pulling and vibrating the second pipe may be realized.
In addition, in the above-mentioned concrete embodiment, the crank of slider-crank mechanism is the eccentric crank of adjustable eccentric distance, and eccentric crank includes crank, interior eccentric wheel, outer eccentric wheel and locking pin, and interior eccentric wheel is different with the rotation center of outer eccentric wheel, and output shaft, interior eccentric wheel, outer eccentric wheel and the crank of second gear motor connect gradually, and the locking pin sets up between interior eccentric wheel and outer eccentric wheel for lock the relative position between outer eccentric wheel and the interior eccentric wheel.
However, the invention is not limited thereto, and instead, only one eccentric wheel connected to the output shaft of the second gear motor may be provided, so that the second pipe may vibrate at a low frequency in the axial direction.
In addition, in the above-described specific embodiment, the end seal device includes an end-connecting pipe having one end sealed, the other end connected to the first flange, a second flange butted with the first flange, a gasket provided between the first flange and the second flange, and a connecting member for connecting the first flange and the second flange.
However, the end sealing device is not limited to this, and may be a waterproof cloth tied to the port of the first pipe or the second pipe, and the function of sealing the port of the first pipe and the port of the second pipe may be achieved as well, but the port is not firmly sealed by using the waterproof cloth, and the waterproof effect is not good.
In addition, in the above specific embodiment, the first clamping device, the second clamping device and the third clamping device have the same structure, and the first clamping device, the second clamping device and the third clamping device respectively have a lower clamping seat and an upper clamping seat, and a clamping space capable of clamping the first pipe fitting or the second pipe fitting is formed between the upper clamping seat and the lower clamping seat.
However, the purpose of fixing the first pipe fitting and the second pipe fitting can be achieved as well by only providing the U-shaped elastic fastening seat instead of the upper clamping seat and the lower clamping seat, but the U-shaped elastic fastening seat has a poor fastening effect, and compared with the U-shaped elastic fastening seat, the lower clamping seat and the upper clamping seat are provided according to the specific embodiment, so that the fixing of the first pipe fitting and the second pipe fitting is more firm, and the influence on the test result is reduced.
In addition, in the above-described specific embodiment, the upper holder is connected to the lower holder through a height adjusting assembly capable of adjusting the height of the upper holder.
However, the height adjusting assembly is not limited thereto, and the height adjusting assembly may be fastened in the same manner, but according to the above embodiment, the height adjusting assembly is provided to facilitate the test of the pipe fitting with different thickness degree, and expand the application range of the device.
In addition, in the above specific embodiment, the height adjusting assembly includes a bolt and a nut, and the height adjusting assembly fixes the upper holder to the lower holder in such a manner that the shaft portion of the bolt sequentially passes through the lower holder and the upper holder and is then locked by the nut.
However, the height adjusting assembly is not limited thereto, and may include only a bolt, and the shaft portion of the bolt may be abutted against the upper holder after passing through the lower holder, without providing a nut, and the height of the upper holder may be adjusted.
In addition, in the above specific embodiment, an inverted V-shaped upper notch is formed on the lower surface of the upper holder, a V-shaped lower notch is formed on the upper surface of the lower holder, and the upper notch and the lower notch correspond to each other to form a fastening space.
However, the lower surface of the upper holder and the upper surface of the lower holder may be flat, and the function of fastening the first pipe and the second pipe may be achieved as well, but the flat may easily slide to affect the test result.
The low-amplitude low-frequency horizontal vibration test apparatus according to the present invention can be composed of various configurations of the above-described embodiments, and can exhibit the same effects as described above.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (8)
1. The utility model provides a low-amplitude low frequency horizontal vibration test device for detect the sealing performance of flexible interface between first pipe fitting and the second pipe fitting, its characterized in that:
an end sealing device having a test stand and an end for sealing the first or second pipe;
taking one direction in the horizontal plane of the test bed as a transverse direction, and taking the direction perpendicular to the transverse direction in the horizontal plane as an axial direction: the low-amplitude low-frequency horizontal vibration test device is also provided with a clamping device and a transverse vibration device;
the clamping device comprises a first clamping device, a second clamping device and a third clamping device; the first clamping device and the second clamping device can clamp and fix the first pipe fitting on the table top of the test table in an axially extending mode, the third clamping device can clamp and fix the second pipe fitting on the table top of the test table in an axially extending mode, and the first pipe fitting and the second pipe fitting are flexibly connected;
the transverse vibration device further comprises a transverse vibration base and a transverse driving transmission device; along the axial direction, one end of the upper surface of the transverse vibration base is connected with the lower surface of the first clamping device, and the other end of the upper surface of the transverse vibration base is connected with the lower surface of the second clamping device; the transverse driving transmission device can drive one end of the transverse vibration base to horizontally rotate and drive the other end of the transverse vibration base to transversely vibrate along a first track hole formed in the test bed;
the transverse driving transmission device comprises a first speed reducing motor and a crank rocker mechanism arranged in the test bed; along the axis direction, two ends of the transverse vibration base are respectively connected with the crank rocker mechanism through a connecting rod penetrating through the table top of the test table; the first speed reducer can drive the crank rocker mechanism to move, so that one end of the transverse vibration base is driven to horizontally rotate and the other end of the transverse vibration base is driven to transversely vibrate along a first track hole formed in the test bed;
the end sealing device comprises an end sealing block, an end connecting pipe, a second flange, a sealing gasket and a connecting piece, wherein the end connecting pipe is connected with the first flange at one end, the second flange is in butt joint with the first flange, the sealing gasket is arranged between the first flange and the second flange, and the connecting piece is used for connecting the first flange and the second flange.
2. The low-amplitude low-frequency horizontal vibration test apparatus according to claim 1, wherein: the low-amplitude low-frequency horizontal vibration test device is also provided with an axial vibration device;
the axial vibration device comprises an axial guiding vibration table and an axial driving transmission device;
the upper surface of the axial guiding and stirring vibration table is connected with the lower surface of the third clamping device, and the axial driving transmission device can drive the axial guiding and stirring vibration table to vibrate axially along a second track hole formed in the test table.
3. The low-amplitude low-frequency horizontal vibration test apparatus according to claim 2, wherein: the axial driving transmission device comprises a second speed reducing motor and a crank block mechanism arranged in the test bed;
the axial guiding vibration table is connected with a slide block of the crank slide block mechanism through a connecting rod penetrating through the table top of the test table;
the second speed reducing motor can drive the crank sliding block mechanism to move, so that the axial guiding vibration table is driven to vibrate axially along a second track hole formed in the test table.
4. A low amplitude, low frequency horizontal vibration testing apparatus according to claim 3, wherein: the crank of the crank slider mechanism is an eccentric crank with adjustable eccentricity;
the eccentric crank comprises a crank, an inner eccentric wheel, an outer eccentric wheel and a locking pin;
the rotation centers of the inner eccentric wheel and the outer eccentric wheel are different;
the output shaft of the second gear motor, the inner eccentric wheel, the outer eccentric wheel and the crank are sequentially connected;
the locking pin is arranged between the inner eccentric wheel and the outer eccentric wheel and used for locking the relative position between the outer eccentric wheel and the inner eccentric wheel.
5. The low-amplitude and low-frequency horizontal vibration test device according to claim 1, wherein the first clamping device, the second clamping device and the third clamping device have the same structure, and the first clamping device, the second clamping device and the third clamping device respectively have a lower clamping seat and an upper clamping seat, and a clamping space capable of clamping the first pipe fitting or the second pipe fitting is formed between the upper clamping seat and the lower clamping seat.
6. The low-amplitude low-frequency horizontal vibration test apparatus according to claim 5, wherein: the upper clamping seat is connected with the lower clamping seat through a height adjusting component capable of adjusting the height of the upper clamping seat.
7. The low-amplitude low-frequency horizontal vibration test apparatus according to claim 6, wherein: the height adjusting assembly comprises a bolt and a nut;
the height adjusting assembly is used for fixing the upper clamping seat on the lower clamping seat in a mode that the rod part of the bolt sequentially penetrates through the lower clamping seat and the upper clamping seat and then is locked by the nut.
8. The low-amplitude low-frequency horizontal vibration test apparatus according to claim 5, wherein an inverted V-shaped upper notch is formed in a lower surface of the upper holder, a positive V-shaped lower notch is formed in an upper surface of the lower holder, and the upper notch and the lower notch correspond to each other to form the clamping space.
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| CN110907297B (en) * | 2019-12-26 | 2021-03-26 | 北京航空航天大学 | Three-point bending fatigue test device applied to displacement loading |
| CN112683473B (en) * | 2020-12-09 | 2023-03-28 | 西安苏试广博环境可靠性实验室有限公司 | Low-frequency large-displacement jolting test bed with protection function |
| CN112934072A (en) * | 2021-01-29 | 2021-06-11 | 浙江中财管道科技股份有限公司 | Calcium carbonate mixed liquid shaking machine |
| CN113074891B (en) * | 2021-03-29 | 2022-07-26 | 上海交通大学 | Low-frequency double-shaft vibrating table |
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