CN209878347U - Hydraulic stretcher calibrating device - Google Patents
Hydraulic stretcher calibrating device Download PDFInfo
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- CN209878347U CN209878347U CN201920766665.1U CN201920766665U CN209878347U CN 209878347 U CN209878347 U CN 209878347U CN 201920766665 U CN201920766665 U CN 201920766665U CN 209878347 U CN209878347 U CN 209878347U
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Abstract
The application relates to the technical field of mechanical measurement and detection, in particular to a hydraulic stretcher calibrating device which comprises a first supporting plate, a force measuring sensor, a second supporting plate, a testing pull rod, a first fastener and a second fastener; the test pull rod sequentially penetrates through the first supporting plate, the force measuring sensor and the second supporting plate, and the first fastener and the second fastener are respectively positioned at two ends of the test pull rod and are locked relatively; the first end of the test pull rod extends out of the first fastener to form a stretcher connecting part for connecting the hydraulic stretcher, and a force unbalance load eliminating structure for correcting the acting force of the second support plate on the second fastener is further arranged between the second fastener and the second support plate, wherein the second fastener is located at the second end of the test pull rod. The application provides a hydraulic stretcher calibrating device, the connecting piece is few, portable can realize the field measurement calibration, and eliminates the structure through the power unbalance loading and has improved the unbalance loading phenomenon between second fastener and the second backup pad greatly.
Description
[ technical field ] A method for producing a semiconductor device
The application relates to the technical field of mechanical measurement detection, in particular to a hydraulic stretcher calibrating device.
[ background of the invention ]
The hydraulic bolt tensioner is called as a hydraulic tensioner for short and has the functions of fastening and dismounting bolts. The method can be widely applied to industries such as wind power generation, metallurgical mines, petrochemical industry, ship industry, nuclear power, rolling stock, heavy machinery and the like. The bolt is stretched in the elastic deformation area by the aid of hydraulic power provided by the ultra-high pressure pump and the elastic amplitude allowed by materials, and the purpose of fastening or detaching the bolt is achieved. In addition, the device can be used as a device for applying axial force by hydraulic interference connection to perform jacking installation. Especially in the working environment with serious pollution or limited space area, the hydraulic stretcher is difficult to replace by any other tool. Due to the specific characteristics of the working environment and the accurate force value, the calibration device is required to be capable of measuring the hydraulic stretcher with high accuracy.
There are generally three measurement modes for such calibration devices. Firstly, the direct measurement is carried out through a pulling force measuring sensor, the calibration device designed based on the mode has more connecting pieces and larger stress deformation, the internal leakage index cannot be well evaluated, and the portable measurement cannot be realized; secondly, the device has the problems of more connecting pieces, overlarge volume and the like by measuring through a reverse force measuring sensor, and cannot realize portable and high-precision measurement; thirdly, the measurement is directly carried out by an annular (cylindrical) force measuring sensor through an inherent bolt, the influence of factors such as unbalance loading and the like is easily caused in the measurement process, and the measurement precision is not high.
[ summary of the invention ]
An object of this application is to provide a hydraulic stretcher calibrating device, utilizes first backup pad with the second backup pad is relative the force cell extrusion is measured the tensile force of being surveyed hydraulic stretcher, and the connecting piece is few, and portable can realize the field measurement calibration, and passes through the structure is eliminated to power unbalance loading has improved greatly the second fastener with unbalance loading phenomenon between the second backup pad for measure the precision of calibration higher.
The application is realized by the following technical scheme:
a hydraulic stretcher calibration device comprises a first supporting plate, a force measuring sensor, a second supporting plate, a test pull rod, a first fastener and a second fastener;
the test pull rod sequentially penetrates through the first support plate, the force measuring sensor and the second support plate, and the first fastener and the second fastener are respectively positioned at two ends of the test pull rod and are locked relatively, so that the force measuring sensor is respectively attached to the first support plate and the second support plate tightly and detects the acting force of relative extrusion of the first support plate and the second support plate;
the first end of the test pull rod extends out of the first fastening piece to form a stretcher connecting part for connecting a hydraulic stretcher, and a force unbalance loading eliminating structure is arranged between the second fastening piece positioned at the second end of the test pull rod and the second supporting plate;
when the second fastener and the second support plate are in unbalance loading, the force unbalance loading eliminating structure is adjusted under the influence of unbalance loading force so that the load of the second fastener is uniformly transmitted to the second support plate all the time.
Optionally, in the above calibration device for a hydraulic tensioner, the force unbalance loading eliminating structure includes a spherical concave surface disposed on the second support plate and an unbalance loading eliminating block sleeved on the test pull rod, and the unbalance loading eliminating block has a spherical convex surface attached to the spherical concave surface and capable of sliding in an offsetting manner relative to the axis of the test pull rod, and a plane attached to the second fastening member;
when the upper surface of the second fastener inclines relative to the horizontal plane to cause the unbalance loading phenomenon between the upper surface of the second fastener and the second support plate, the spherical convex surface of the unbalance loading elimination block slides along the spherical concave surface of the test pull rod, so that the plane of the unbalance loading elimination block is attached to the upper surface of the second fastener, and the load of the second fastener is uniformly transmitted to the second support plate all the time.
Optionally, in the hydraulic tensioner calibration device as described above, a gap is provided between the offset load elimination block and the test pull rod, and the offset load elimination block slides in an offset manner with respect to an axis of the test pull rod.
Optionally, as for the calibration device for the hydraulic stretcher, a tapered recess is formed in the first support plate, and a tapered positioning block sleeved on the test pull rod is arranged in the tapered recess.
Optionally, a hydraulic tensioner calibration device as described above, the tapered locating block is threadedly connected to the test draw rod.
Optionally, in the calibration device for a hydraulic stretcher described above, the first support plate is provided with a first limit groove for covering the upper end of the load cell.
Optionally, the hydraulic tensioner calibration device as described above further includes a base fixed to an outer peripheral side of the second support plate, and a top of the base protrudes from the second support plate to form a second limit groove covering a lower end of the load cell.
Optionally, in a hydraulic tensioner calibration device as described above, the bottom of the base extends downward to form a support foot.
Optionally, in the above calibration device for the hydraulic tensioner, a first threaded section is provided at the upper end of the test pull rod, a second threaded section is provided at the lower end of the test pull rod, the first fastening member is in threaded connection with the first threaded section, and the second fastening member is in threaded connection with the second threaded section.
Optionally, as described above, the force sensor is provided with a data acquisition interface, and the hydraulic stretcher calibration device further includes a data transmission line electrically connected to the data acquisition interface and a data acquisition processing device electrically connected to the data transmission line.
Compared with the prior art, the method has the following advantages:
1. the hydraulic stretcher calibrating device utilizes first backup pad with the second backup pad is relative the tensile force of being surveyed hydraulic stretcher is measured in the force cell extrusion, and the connecting piece is few, and portable can realize the field measurement calibration, and passes through the structure is eliminated to power unbalance loading has improved greatly the second fastener with unbalance loading phenomenon between the second backup pad for the precision of measuring the calibration is higher.
2. Through the toper shrinkage pool with the yawing force can be eliminated to the cooperation of toper locating piece on the one hand, makes first backup pad with the coincidence of the axis of test pull rod guarantees that first backup pad and force cell's interact power is on same axial, and on the other hand can make first backup pad with have the clearance between the test pull rod, eliminate first backup pad is relative frictional force when testing pull rod axial motion improves the measuring accuracy.
3. Through the first limiting groove and the second limiting groove, the acting force among the first supporting plate, the force measuring sensor and the second supporting plate is ensured to be on the same axis, and the measuring precision of the force measuring sensor is improved.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a front elevational view, in full section, of a hydraulic tensioner calibration apparatus in accordance with an embodiment of the present application;
FIG. 2 is a schematic diagram illustrating the use of the hydraulic stretcher calibration device according to the embodiment of the present application;
fig. 3 is a schematic view of a connection structure of the second support plate and the offset load elimination block according to an embodiment of the present application;
fig. 4 is a schematic structural principle diagram of a force unbalance loading eliminating structure according to an embodiment of the present application.
[ detailed description ] embodiments
In order to make the technical problems, technical solutions and advantageous effects solved by the present application more clear and obvious, the present application 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 present application and are not intended to limit the present application.
As shown in fig. 1 to 4, the present embodiment provides a hydraulic tensioner calibration device, which includes a first support plate 1, a load cell 3, a second support plate 2, a test pull rod 4, a first fastener 5, and a second fastener 6.
The test pull rod 4 sequentially penetrates through the first supporting plate 1, the force measuring sensor 3 and the second supporting plate 2, the first fastener 5 and the second fastener 6 are respectively located at two ends of the test pull rod 4 and are locked relatively, so that the force measuring sensor 3 is respectively attached to and detects the first supporting plate 1 and the second supporting plate 2, and the first supporting plate 1 and the second supporting plate 2 are extruded relatively to exert force.
The first end of the test pull rod 4 extends out of the first fastening piece 5 to form a stretcher connecting part 41 for connecting a hydraulic stretcher, a force unbalance loading eliminating structure 7 is further arranged between the second fastening piece 6 and the second support plate 2, which are positioned at the second end of the test pull rod 4, and when the second fastening piece 6 and the second support plate 2 generate unbalance loading, the force unbalance loading eliminating structure 7 is adjusted under the influence of unbalance loading force so that the load of the second fastening piece 6 is uniformly transmitted to the second support plate 2 all the time.
Hydraulic stretching ware calibrating device utilizes first backup pad 1 with second backup pad 2 is relative force cell sensor 3 extrudees and measures the tensile force of being surveyed hydraulic stretching ware, and the connecting piece is few, and portable can realize the field measurement calibration, and passes through structure 7 has been improved greatly to power unbalance loading elimination second fastener 6 with unbalance loading phenomenon between the second backup pad 2 for measure the precision of calibration higher.
Specifically, the upper end of the test pull rod 4 is provided with a first threaded section 42, the stretcher connecting part 41 is arranged at the upper part of the first threaded section 42, the lower end of the test pull rod 4 is provided with a second threaded section 43, the first fastening piece 5 is in threaded connection with the first threaded section 42, and the second fastening piece 6 is in threaded connection with the second threaded section 43. The threaded connection is adopted, so that the structure is simple, the connection is reliable, and the disassembly and the assembly are convenient.
Correspondingly, the force unbalance loading eliminating structure 7 includes a spherical concave surface 71 disposed on the second supporting plate 2 and an unbalance loading eliminating block 72 sleeved on the testing pull rod 4, and the unbalance loading eliminating block 72 has a spherical convex surface 721 attached to the spherical concave surface 71 and capable of sliding in an offset manner relative to the axis of the testing pull rod 4, and a plane 722 attached to the second fastening member 6. When the upper surface of the second fastening member 6 is inclined with respect to the horizontal plane, which causes the unbalance loading phenomenon between the upper surface of the second fastening member 6 and the second support plate 2, the spherical convex surface 721 of the unbalance loading elimination block 72 slides along the spherical concave surface 71 of the test pull rod 4, so that the plane 722 of the unbalance loading elimination block 72 is attached to the upper surface of the second fastening member 6, and the load of the second fastening member 6 is uniformly transmitted to the second support plate 2 all the time. Of course, a gap for the offset load elimination block 72 to slide in an offset manner relative to the axis of the test pull rod 4 is provided between the offset load elimination block 72 and the test pull rod 4.
Due to the reasons of uneven force application, machining error, assembly error, threaded connection and the like in the using process, particularly due to the fact that the second fastening piece 6 inclines due to the spiral inclination of a thread line during threaded connection, the acting force of the second fastening piece 6 inclines to one side easily, namely, the acting force unbalance loading phenomenon, the plane 722 of the unbalance loading eliminating block 72 is attached to and slides with the spherical concave surface 71 through the spherical convex surface 721, so that the acting force unbalance loading phenomenon is greatly improved, and the measuring precision is improved.
In this embodiment, the first support plate 1 is provided with a conical recess 11, and the conical recess 11 is provided with a conical positioning block 8 sleeved on the test pull rod 4. The conical positioning block 8 is in threaded connection with the test pull rod 4 or the conical positioning block 8 is sleeved on the test pull rod 4 in a sliding connection manner. Through toper shrinkage pool 11 with the lateral force can be eliminated to the cooperation of toper locating piece 8 on the one hand, makes first backup pad 1 with the coincidence of the axis of test pull rod 4 guarantees that first backup pad 1 and force cell sensor 3's interact power is on same axial, and on the other hand can make first backup pad 1 with have the clearance between the test pull rod 4, eliminate first backup pad 1 is relative frictional force when testing pull rod 4 axial motion improves the measuring accuracy.
Preferably, the first support plate 1 is provided with a first limit groove 12 for covering the upper end of the load cell 3. And the base 9 is fixed on the outer periphery of the second support plate 2, and the top of the base 9 protrudes from the second support plate 2 to form a second limit groove 13 which covers the lower end of the load cell 3. Specifically, the first limit groove 12 and the second limit groove 13 are both circular grooves whose axes coincide with the axis of the load cell 3. Through the first limit groove 12 and the second limit groove 13, the acting force among the first support plate 1, the force measuring sensor 3 and the second support plate 2 is ensured to be on the same axis, and the measuring precision of the force measuring sensor 3 is improved.
In this embodiment, the base 9 is made of an aluminum alloy material, and the bottom of the base 9 extends downward to form a supporting leg. The hydraulic stretcher calibrating device can be conveniently fixed at the working position, and can play a role in safety protection.
In the present embodiment, the test tie bar 4 is a high-strength alloy steel bolt having a tensile strength rating of 12.9 or higher, and the first fastening member 5 and the second fastening member 6 are high-strength alloy steel nuts having a tensile strength rating of 12.9 or higher; the force measuring sensor 3 is an annular force measuring sensor, and annular force measuring sensors with different measuring ranges and sizes can be selected according to hydraulic stretchers with different models; the material of the unbalance loading eliminating block 72 is high-strength alloy steel
In this embodiment, the force sensor 3 is provided with a data acquisition interface 31, and the hydraulic stretcher calibration device further includes a data transmission line 32 electrically connected to the data acquisition interface 31 and a data acquisition processing device 33 electrically connected to the data transmission line 32. The data acquisition and processing device 33 can acquire and process the data measured by the load cell 3 to realize the operations of displaying, zeroing and the like.
For a better understanding of the present application, the measurement calibration process of the present application embodiment is set forth below:
it should be noted that the tested hydraulic stretcher comprises a stretcher supporting leg 10 and a hydraulic stretcher piston 20 embedded in the upper part of the stretcher supporting leg 10, a bolt connecting hole 201 is arranged on the hydraulic stretcher piston 20, and a hydraulic driving cavity 30 is arranged between the hydraulic stretcher piston 20 and the stretcher supporting leg 10.
The first supporting plate 1, the force measuring sensor 3, the second supporting plate 2, the test pull rod 4, the first fastener 5, the second fastener 6, the unbalance loading eliminating block 72, the conical positioning block 8 and the base 9 of the hydraulic stretcher calibrating device are in a modular design, and are assembled according to a connection relation when in use.
During measurement, the bolt connecting hole 201 of the hydraulic stretcher to be measured is in threaded connection with the stretcher connecting part 41, the lower part of the stretcher supporting leg 10 is abutted against the first supporting plate 1, at the moment, hydraulic liquid is pressed into the hydraulic driving cavity 30, the hydraulic stretcher piston 20 drives the test pull rod 4 to move upwards, so that the first supporting plate 1 moves downwards relative to the test pull rod 4 under the abutting pressure of the stretcher supporting leg 10, the second supporting plate 2 moves upwards relative to the test pull rod 4 under the abutting pressure of the second fastening piece 6, namely the first supporting plate 1 and the second supporting plate 2 are relatively extruded to generate acting force to the force measuring sensor 3, and the force measuring sensor 3 measures the acting force to serve as the stretching force of the hydraulic stretcher to be measured.
In summary, the present application has, but is not limited to, the following beneficial effects:
1. hydraulic stretching ware calibrating device utilizes first backup pad 1 with second backup pad 2 is relative force cell sensor 3 extrudees and measures the tensile force of being surveyed hydraulic stretching ware, and the connecting piece is few, and portable can realize the field measurement calibration, and passes through structure 7 has been improved greatly to power unbalance loading elimination second fastener 6 with unbalance loading phenomenon between the second backup pad 2 for measure the precision of calibration higher.
2. Through toper shrinkage pool 11 with the lateral force can be eliminated to the cooperation of toper locating piece 8 on the one hand, makes first backup pad 1 with the coincidence of the axis of test pull rod 4 guarantees that first backup pad 1 and force cell sensor 3's interact power is on same axial, and on the other hand can make first backup pad 1 with have the clearance between the test pull rod 4, eliminate first backup pad 1 is relative frictional force when testing pull rod 4 axial motion improves the measuring accuracy.
3. Through the first limit groove 12 and the second limit groove 13, the acting force among the first support plate 1, the force measuring sensor 3 and the second support plate 2 is ensured to be on the same axis, and the measuring precision of the force measuring sensor 3 is improved.
It should be understood that the terms "first", "second", etc. are used herein to describe various information, but the information should not be limited to these terms, and these terms are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present application. Furthermore, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
The foregoing is illustrative of one or more embodiments provided in connection with the detailed description and is not intended to limit the disclosure to the particular forms disclosed. Similar or identical methods, structures, etc. as used herein, or several technical inferences or substitutions made on the concept of the present application should be considered as the scope of the present application.
Claims (10)
1. A hydraulic stretcher calibration device is characterized by comprising a first support plate (1), a load cell (3), a second support plate (2), a test pull rod (4), a first fastener (5) and a second fastener (6);
the test pull rod (4) is sequentially arranged on the first support plate (1), the force measuring sensor (3) and the second support plate (2) in a penetrating mode, the first fastener (5) and the second fastener (6) are respectively located at two ends of the test pull rod (4) and are locked relatively, so that the force measuring sensor (3) is respectively attached to the first support plate (1) and the second support plate (2) tightly, and the acting force of relative extrusion of the first support plate (1) and the second support plate (2) is detected;
a first end of the test pull rod (4) extends out of the first fastening piece (5) to form a stretcher connecting part (41) for connecting a hydraulic stretcher, and a force unbalance loading eliminating structure (7) is arranged between the second fastening piece (6) at the second end of the test pull rod (4) and the second support plate (2);
when the second fastening piece (6) and the second support plate (2) are in unbalance loading, the force unbalance loading eliminating structure (7) is adjusted under the influence of unbalance loading force so that the load of the second fastening piece (6) is uniformly transmitted to the second support plate (2) all the time.
2. The hydraulic tensioner calibration device according to claim 1, wherein the force offset load elimination structure (7) comprises a spherical concave surface (71) arranged on the second support plate (2) and an offset load elimination block (72) sleeved on the test pull rod (4), and the offset load elimination block (72) is provided with a spherical convex surface (721) which is jointed with the spherical concave surface (71) and can slide in an offset way relative to the axis of the test pull rod (4) and a plane (722) which is jointed with the second fastening piece (6);
when the upper surface of the second fastener (6) inclines relative to the horizontal plane to cause the unbalance loading phenomenon between the second fastener and the second support plate (2), the spherical convex surface (721) of the unbalance loading elimination block (72) slides along the spherical concave surface (71) of the test pull rod (4), so that the plane (722) of the unbalance loading elimination block (72) is attached to the upper surface of the second fastener (6), and the load of the second fastener (6) is uniformly transmitted to the second support plate (2) all the time.
3. A hydraulic tensioner calibration device as claimed in claim 2, characterized in that a clearance is provided between the unbalance removal block (72) and the test draw bar (4) for the unbalance removal block (72) to slide in an offsetting manner with respect to the axis of the test draw bar (4).
4. A hydraulic tensioner calibration device as claimed in any one of claims 1 to 3, characterized in that the first support plate (1) is provided with a conical recess (11), and a conical positioning block (8) sleeved on the test pull rod (4) is provided in the conical recess (11).
5. A hydraulic tensioner calibration device as claimed in claim 4, characterized in that the conical locating block (8) is screwed to the test rod (4).
6. A hydraulic tensioner calibration device as claimed in claim 1, characterized in that the first support plate (1) is provided with a first limit groove (12) which covers the upper end of the load cell (3).
7. A hydraulic tensioner calibration device as claimed in claim 6, further comprising a base (9) fixed to the outer periphery of the second support plate (2), wherein the top of the base (9) protrudes from the second support plate (2) to form a second limit groove (13) for covering the lower end of the load cell (3).
8. A hydraulic tensioner calibration device as claimed in claim 7, characterized in that the bottom of the base (9) protrudes downwards to form a support foot.
9. A hydraulic tensioner calibration device as claimed in any one of claims 1 to 3, characterized in that the upper end of the test pull rod (4) is provided with a first threaded section (42), the tensioner connection part (41) is provided on the upper part of the first threaded section (42), the lower end of the test pull rod (4) is provided with a second threaded section (43), the first fastening member (5) is in threaded connection with the first threaded section (42), and the second fastening member (6) is in threaded connection with the second threaded section (43).
10. A hydraulic tensioner calibration device as claimed in any one of claims 1 to 3, characterized in that the load cell (3) is provided with a data acquisition interface (31), and the hydraulic tensioner calibration device further comprises a data transmission line (32) electrically connected to the data acquisition interface (31) and a data acquisition processing device (33) electrically connected to the data transmission line (32).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920766665.1U CN209878347U (en) | 2019-05-24 | 2019-05-24 | Hydraulic stretcher calibrating device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920766665.1U CN209878347U (en) | 2019-05-24 | 2019-05-24 | Hydraulic stretcher calibrating device |
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| CN209878347U true CN209878347U (en) | 2019-12-31 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110208021A (en) * | 2019-05-24 | 2019-09-06 | 广东省中山市质量计量监督检测所 | A kind of hydraulic elongator calibrating installation |
| CN113252494A (en) * | 2021-03-30 | 2021-08-13 | 湘潭市计量测试检定所 | Calibration method for hydraulic bolt tensioner |
-
2019
- 2019-05-24 CN CN201920766665.1U patent/CN209878347U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110208021A (en) * | 2019-05-24 | 2019-09-06 | 广东省中山市质量计量监督检测所 | A kind of hydraulic elongator calibrating installation |
| CN110208021B (en) * | 2019-05-24 | 2024-01-26 | 广东省中山市质量计量监督检测所 | Hydraulic stretcher calibrating device |
| CN113252494A (en) * | 2021-03-30 | 2021-08-13 | 湘潭市计量测试检定所 | Calibration method for hydraulic bolt tensioner |
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