CN110779650A - Expansive force testing mechanism - Google Patents
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- CN110779650A CN110779650A CN201911240175.9A CN201911240175A CN110779650A CN 110779650 A CN110779650 A CN 110779650A CN 201911240175 A CN201911240175 A CN 201911240175A CN 110779650 A CN110779650 A CN 110779650A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The invention discloses an expansion force testing mechanism which comprises a support and a reaction frame, wherein a platen is arranged on the support, a reaction barrel with an opening at the top is fixedly arranged on the platen, a grouting opening is formed in the bottom end of the reaction barrel, a valve is arranged on the grouting opening, a piston moving along the axial direction of the reaction barrel is arranged in the reaction barrel, a first connecting rod is arranged on the piston, a force value measuring element and a displacement measuring element are arranged on the first connecting rod, the top end of the first connecting rod extends to the reaction frame and is connected with the reaction frame, the lower part of the reaction frame movably penetrates through the platen, and a load adding device is arranged at the lower part of the reaction frame. The expansion force of the expansion object under different loads can be measured, and the measurement accuracy is high. The invention is applied to the technical field of geotechnical engineering.
Description
Technical Field
The invention relates to the technical field of geotechnical engineering, in particular to an expansion force testing mechanism.
Background
In recent years, with the continuous development of civil and hydraulic engineering in China, aiming at various 'water-soil' engineering diseases, a batch of novel civil engineering materials suitable for different diseases and assisting in strengthening and rescuing are developed. The foaming high polymer grouting material has the characteristics of no water reaction, early strength, large expansibility, strong durability and the like, and is widely applied to engineering emergency rescue and repair reinforcement caused by water-soil diseases. The diseases such as subsidence of a road surface, an airport pavement, an underground pipeline, a channel plate and a high-speed rail pavement are the most common diseases among a plurality of water-soil diseases, the traditional method is to perform high polymer conduit grouting lifting on the disease position, but the expansion force parameter of the high polymer is obtained in advance. However, the existing measuring method is to perform grouting in a closed container, and the soil pressure cell is installed in the upper cover of the reaction container to measure the expansion force of the high polymer, so that the constraint of the upper load is neglected, the actual engineering situation is not met, and the precision of the existing soil pressure cell and the accuracy of the measuring result are both considered. Therefore, a device capable of accurately measuring the expansion force of the polymer under the action of the fixed constraint is needed.
The patent document with the authorization number of CN205748755U discloses a multichannel rock-soil expansive force automatic testing system, which comprises a group of expansive force testers with the same structure, wherein the expansive force testers are electrically connected with a central control system and comprise an anti-deformation frame consisting of a base, a top plate and two upright posts for connecting the base and the top plate, an S-shaped force transducer is arranged below the top plate, a lead screw lifting device is arranged on the base, a tray is arranged at the end part of a top rod of the lead screw lifting device, and a sample container is clamped between the S-shaped force transducer and the tray; the signal output end of the S-shaped force sensor is electrically connected with the input end of the analog-to-digital converter, the output end of the analog-to-digital converter is electrically connected with the signal input end of the PLC, and the signal output end of the PLC is electrically connected with the signal input end of the central control system.
The solution in the above patent document does not have any technical suggestion on how to measure the expansion force under different loads, and the measurement accuracy is not high.
Disclosure of Invention
The invention mainly aims to provide an expansion force testing mechanism which can measure the expansion force of an expansion object under different loads and has high measurement precision.
In order to achieve the purpose, the invention provides an expansion force testing mechanism which comprises a support and a reaction frame, wherein a platen is arranged on the support, a reaction barrel with an opening at the top is fixedly arranged on the platen, a grouting opening is formed in the bottom end of the reaction barrel, a valve is arranged on the grouting opening, a piston moving along the axial direction of the reaction barrel is arranged in the reaction barrel, a first connecting rod is arranged on the piston, a force value measuring element and a displacement measuring element are arranged on the first connecting rod, the top end of the first connecting rod extends to the reaction frame and is connected with the reaction frame, the lower part of the reaction frame movably penetrates through the platen, and a load adding device is arranged at the lower part of the reaction frame.
Preferably, the dilatant tested according to the invention is a high polymer; the support can be a plurality of support legs arranged at the bottom end of the bedplate, and the support and the bedplate form the structure of the working platform.
The force measuring device is characterized in that the force value measuring element is a force measuring ring, the displacement measuring element comprises an electronic dial indicator and a data acquisition instrument, the force measuring ring is embedded in the first connecting rod, the electronic dial indicator is arranged in the force measuring ring, and the electronic dial indicator and the data acquisition instrument are electrically connected. The first connecting rod is divided into two sections, one section of the first connecting rod is connected to the top end of the force measuring ring, the other section of the first connecting rod is connected to the bottom end of the force measuring ring, force values and displacement can be accurately tested through the force measuring ring and the electronic dial indicator, the data acquisition instrument is used for reading the reading of the electronic dial indicator, the electronic dial indicator and the data acquisition instrument are connected through data lines, and the electronic dial indicator transmits data to the data display instrument through the data lines. After the reading of the data acquisition instrument is stable, an expansion force change curve (expansion force is equal to (reading variation of an electronic dial indicator is multiplied by a measurement force ring coefficient is multiplied by 10)/the average stress area of the calculus body at the contact position of the high polymer calculus body and the piston) and a vertical displacement curve (displacement is equal to reading variation of the dial indicator) in the reaction process can be obtained, the steps are repeated by changing the number of grouting guns and the load, and then the relation between the expansion force, the fixed constraint force and the high polymer density can be obtained.
In a further improvement, the piston is provided with an exhaust hole, and the inside of the reaction barrel is communicated with the outside through the exhaust hole. The exhaust hole is used for exhausting gas generated in the reaction process of the high polymer, and the expansion force of the high polymer can be more accurately measured after the gas generated in the reaction of the high polymer is exhausted.
In a further improvement, the inner wall of the reaction barrel is provided with a step, the inner diameter of the upper part of the step is larger than that of the lower part of the step in the reaction barrel, and the piston is movably arranged on the upper part of the step. Because of the high polymer reaction needs certain space, the step can block the piston, and the high polymer reaction prevents the piston from falling to the bottom of the reaction barrel, so that the high polymer can be fully reacted.
Further improved, the inner wall of the reaction barrel is coated with lubricating oil, so that the piston can smoothly slide on the inner wall of the reaction barrel.
Further improved, the piston is sleeved with a sealing ring, and the sealing ring can seal between the piston and the reaction barrel, so that good tightness is guaranteed.
Further improved, the edge of the top of the reaction barrel is bent outwards, the edge of the top of the reaction barrel is connected with the bedplate through a first bolt, and the reaction barrel is convenient to disassemble and assemble and is convenient to clean and maintain.
The reaction frame comprises a plurality of upper cross beams and a plurality of lower cross beams, the ends of the upper cross beams are sequentially connected to form a first frame structure, the ends of the lower cross beams are sequentially connected to form a second frame structure, the upper cross beams and the lower cross beams are connected through second bolts, the upper cross beams are located above the bedplate, the second bolts penetrate through the bedplate movably, the lower cross beams are located below the bedplate, the top ends of the first connecting rods extend to the upper cross beams and are connected with the upper cross beams, and the load adding device is arranged on the lower cross beams. The vertical position of entablature, bottom end rail all can pass through the second bolt and adjust, during the test, can adjust the height of entablature and bottom end rail according to specific condition, can adapt to multiple reaction condition.
In a further improvement, the load adding device comprises a second connecting rod and a lever beam, the second connecting rod is connected to the bedplate, the first end of the lever beam is rotatably hung on the second connecting rod, a weight plate is arranged at the second end of the lever beam, and the middle part of the lever beam is movably hung at the bottom end of the reaction frame. Specifically, the middle part of the lever beam is provided with a hanging ring, the bottom end of the reaction frame, namely the lower beam is provided with a hook, the middle part of the lever beam is movably hung on the hook through the hanging ring, and when the hanging ring is hung on the hook, the load added on the weight plate can be transmitted to the piston through the lower beam, the second bolt, the upper beam and the first connecting rod. Of course, the hook can also be arranged on the lever beam, and correspondingly, the hanging ring is arranged on the lower beam.
In a further improvement, the first end of the lever beam is further provided with a fine adjustment weight, a connection point of the lever beam and the second connecting rod is located between the fine adjustment weight and the weight tray, and the fine adjustment weight is arranged in a sliding manner along the length direction of the lever beam. The fine setting weight is used for the fine setting, makes the interpolation and the regulation of load more accurate convenient.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
when the expansion force of the expansion object is measured, the valve is opened firstly, the expansion object is injected into the reaction barrel from the grouting port, and the valve is closed after the injection is finished. Slowly expanding the object to be expanded, adding a load on the load adding device, transmitting the load added by the load adding device to a first connecting rod through a reaction frame, and transmitting the load to a piston through the first connecting rod; the force value measuring element is used for measuring the acting force of the expansion object on the first connecting rod in the expansion process, and the displacement measuring element can detect the displacement of the piston in the expansion process of the expansion object. By applying different loads to the load applying means and repeating the above steps, the expansion force of the dilatant under different loads can be measured, i.e. displacement force/piston area.
The invention acts on the reaction frame through the load adding device, and the reaction frame acts on the piston in a reverse direction through the first connecting rod, so that the expansion force of the expansion object is tested under the fixed constraint action; the expansion force is measured through the force value measuring element, the displacement is measured through the displacement measuring element, the size of the expansion force can be accurately measured, and the device is simple to operate, economical and practical.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an expansion force testing mechanism.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indications such as up, down, left, right, front and rear … … in the embodiment of the present invention are only used to explain the relative positional relationship, movement, etc. between the components in a specific posture as shown in the drawings, and if the specific posture is changed, the directional indication is changed accordingly.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Referring to fig. 1, an expansive force testing mechanism includes a support 1 and a reaction frame 2, a platen 3 is disposed on the support 1, a reaction barrel 4 with an open top is fixedly disposed on the platen 3, a grouting port 41 is disposed at a bottom end of the reaction barrel 4, a valve 42 is disposed on the grouting port 41, a piston 5 axially moving along the reaction barrel 4 is disposed in the reaction barrel 4, a first connecting rod 51 is disposed on the piston 5, a force value measuring element 52 and a displacement measuring element 53 are disposed on the first connecting rod 51, a top end of the first connecting rod 51 extends to the reaction frame 2 and is connected with the reaction frame 2, a lower portion of the reaction frame 2 movably penetrates through the platen 3, and a load adding device 6 is disposed at a lower portion of the reaction frame 2.
In this embodiment, when the expansion force of the expandable material is measured, the valve 42 is first opened to inject the expandable material into the reaction tank 4 through the injection port 41, and the valve 42 is closed after the injection. The object to be expanded is slowly expanded, a load is added on the load adding device 6, the load added on the load adding device 6 is transmitted to the first connecting rod 51 through the reaction frame 2, and the first connecting rod 51 is transmitted to the piston 5; the displacement measuring element 53 can detect the displacement of the piston 5 during the expansion of the expansion object by measuring the force applied to the first connecting rod 51 by the expansion object during the expansion by the force value measuring element 52. By applying different loads to the load applying means 6 and repeating the above steps, the expansion force of the expansion object under different loads can be measured, i.e. displacement force/area of the piston 5.
In the embodiment, the load adding device 6 acts on the reaction frame 2, and the reaction frame 2 reversely acts on the piston 5 through the first connecting rod 51, so that the expansion force of the expansion object is tested under the fixed constraint action; the expansion force is measured by the force value measuring element 52, the displacement is measured by the displacement measuring element 53, the expansion force can be accurately measured, and the device is simple to operate, economical and practical.
Preferably, the dilatant tested in this example is a high polymer; the support 1 can be a plurality of support legs arranged at the bottom end of the bedplate 3, and the support 1 and the bedplate 3 form the structure of a working platform.
In this embodiment, as a further improvement of the above technical solution, the force measuring element 52 is a force measuring ring, the displacement measuring element 53 includes an electronic dial indicator 531 and a data acquisition instrument 532, the force measuring ring is embedded in the first connecting rod 51, the electronic dial indicator 531 is arranged in the force measuring ring, and the electronic dial indicator 531 is electrically connected to the data acquisition instrument 532. The first connecting rod 51 is divided into two sections, one section of the first connecting rod is connected to the top end of the force measuring ring, the other section of the first connecting rod is connected to the bottom end of the force measuring ring, force values and displacement can be accurately tested through the force measuring ring and the electronic dial indicator 531, the data acquisition instrument 532 is used for reading the readings of the electronic dial indicator 531, the electronic dial indicator 531 and the data acquisition instrument 532 are connected through a data line, and the electronic dial indicator 531 transmits data to the data display instrument through the data line. After the data acquisition instrument 532 has stable readings, an expansion force change curve (expansion force is (the reading variation of the electronic dial indicator 531 is multiplied by the measurement force loop coefficient is multiplied by 10)/the average stress area of the stone body at the contact part of the high polymer stone body and the piston 5) and a vertical displacement curve (displacement is the reading variation of the dial indicator) in the reaction process can be obtained, the number of grouting guns and the load are changed, and the steps are repeated, so that the relation between the expansion force, the fixed constraint force and the high polymer density can be obtained.
In this embodiment, as a further improvement of the above technical solution, the piston 5 is provided with an exhaust hole 54, and the inside of the reaction barrel 4 is communicated with the outside through the exhaust hole 54. The vent 54 is used for exhausting gas generated in the reaction process of the high polymer, and the expansion force of the high polymer can be more accurately measured after the gas generated in the reaction of the high polymer is exhausted.
In this embodiment, as a further improvement of the above technical solution, a step 43 is disposed on an inner wall of the reaction barrel 4, an inner diameter of an upper portion of the step 43 in the reaction barrel 4 is larger than an inner diameter of a lower portion of the step 43, and the piston 5 is movably disposed on the upper portion of the step 43. Because a certain space is needed in the reaction of the high polymer, the step 43 can block the piston 5, and the piston 5 is prevented from falling to the bottom of the reaction barrel 4 in the reaction of the high polymer, so that the high polymer can be fully reacted.
In this embodiment, as a further improvement of the above technical solution, the inner wall of the reaction barrel 4 is coated with lubricating oil, so that the piston 5 can smoothly slide on the inner wall of the reaction barrel 4.
In this embodiment, as the further improvement of above-mentioned technical scheme, the cover is equipped with sealing washer 55 on the piston 5, and sealing washer 55 can be sealed between piston 5 and the reaction barrel 4, guarantees good leakproofness.
In this embodiment, as the further improvement of above-mentioned technical scheme, 4 top edges of reaction barrel buckle outwards, link to each other through first bolt 44 between 4 top edges of reaction barrel and the platen 3, 4 easy dismounting of reaction barrel is convenient for wash the maintenance.
In this embodiment, as a further improvement of the above technical solution, the reaction frame 2 includes an upper beam 21 and a lower beam 22, the upper beam 21 and the lower beam 22 are connected through a second bolt 23, the upper beam 21 is located above the bedplate 3, the second bolt 23 is movably inserted into the bedplate 3, the lower beam 22 is located below the bedplate 3, the top end of the first connecting rod 51 extends to the upper beam 21 and is connected with the upper beam 21, and the load adding device 6 is arranged on the lower beam 22. The vertical position of entablature 21, bottom end rail 22 all can be adjusted through second bolt 23, during the test, can adjust the height of entablature 21 and bottom end rail 22 according to specific condition, can adapt to multiple reaction condition.
In the embodiment, as a further improvement of the above technical solution, the load adding device 6 includes a second connecting rod 61 and a lever beam 62, the second connecting rod 61 is connected to the bedplate 3, a first end 621 of the lever beam 62 is rotatably hung on the second connecting rod 61, a second end 622 of the lever beam 62 is provided with a weight tray 63, and a middle portion of the lever beam 62 is also movably hung on the bottom end of the reaction frame 2. Specifically, the middle of the lever beam 62 is provided with a hanging ring 64, the bottom end of the reaction frame 2, i.e., the lower beam 22, is provided with a hook 221, the middle of the lever beam 62 is movably hung on the hook 221 through the hanging ring 64, and when the hanging ring 64 is hung on the hook 221, the load added on the weight tray 63 can be transmitted to the piston 5 through the lower beam 22, the second bolt 23, the upper beam 21 and the first connecting rod 51. Of course, the hook 221 can also be arranged on the lever cross member 62, and correspondingly, the hanging ring 64 is arranged on the lower cross member 22.
In this embodiment, as a further improvement of the above technical solution, the first end 621 of the lever beam 62 is further provided with a fine adjustment weight 65, a connection point between the lever beam 62 and the second connection rod 61 is located between the fine adjustment weight 65 and the weight tray 63, the fine adjustment weight 65 is slidably disposed along the length direction of the lever beam 62, and the lever beam 62 is further provided with a weight measuring meter. The fine-tuning weight 65 is used for fine tuning, so that the addition and adjustment of the load are more accurate and convenient.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The expansive force testing mechanism is characterized by comprising a support and a reaction frame, wherein a platen is arranged on the support, a reaction barrel with an open top is fixedly arranged on the platen, a grouting opening is formed in the bottom end of the reaction barrel, a valve is arranged on the grouting opening, a piston moving along the axial direction of the reaction barrel is arranged in the reaction barrel, a first connecting rod is arranged on the piston, a force value measuring element and a displacement measuring element are arranged on the first connecting rod, the top end of the first connecting rod extends to the reaction frame and is connected with the reaction frame, the lower portion of the reaction frame movably penetrates through the platen, and a load adding device is arranged on the lower portion of the reaction frame.
2. The expansive force testing mechanism of claim 1, wherein the force measuring element is a force measuring ring, the displacement measuring element comprises an electronic dial indicator and a data acquisition instrument, the force measuring ring is embedded in the first connecting rod, the electronic dial indicator is arranged in the force measuring ring, and the electronic dial indicator and the data acquisition instrument are electrically connected.
3. The expansive force testing mechanism of claim 1, wherein the piston is provided with an exhaust hole, and the interior of the reaction barrel is communicated with the outside through the exhaust hole.
4. The expansive force testing mechanism of claim 1, wherein a step is formed on the inner wall of the reaction barrel, the inner diameter of the upper part of the step in the reaction barrel is larger than that of the lower part of the step, and the piston is movably arranged on the upper part of the step.
5. The expansive force testing mechanism of claim 1, wherein the inner wall of the reaction barrel is coated with a lubricating oil.
6. The expansion force testing mechanism of claim 1, wherein a sealing ring is sleeved on the piston.
7. The expansive force testing mechanism of claim 1, wherein the top edge of the reaction barrel is bent outwards, and the top edge of the reaction barrel is connected with the platen through a first bolt.
8. The expansive force testing mechanism of claim 1, wherein the reaction frame comprises an upper cross beam and a lower cross beam, the upper cross beam and the lower cross beam are connected through a second bolt, the upper cross beam is located above the bedplate, the second bolt is movably arranged on the bedplate in a penetrating mode, the lower cross beam is located below the bedplate, the top end of the first connecting rod extends to the upper cross beam and is connected with the upper cross beam, and the load adding device is arranged on the lower cross beam.
9. The expansion force testing mechanism according to any one of claims 1 to 8, wherein the load adding device comprises a second connecting rod and a lever beam, the second connecting rod is connected to the bedplate, a first end of the lever beam is rotatably hung on the second connecting rod, a second end of the lever beam is provided with a weight tray, and the middle part of the lever beam is also movably hung on the bottom end of the reaction frame.
10. The expansive force testing mechanism of claim 9, wherein the first end of the lever beam is further provided with a fine adjustment weight, the connection point of the lever beam and the second connecting rod is located between the fine adjustment weight and the weight tray, and the fine adjustment weight is slidably arranged along the length direction of the lever beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911240175.9A CN110779650A (en) | 2019-12-06 | 2019-12-06 | Expansive force testing mechanism |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911240175.9A CN110779650A (en) | 2019-12-06 | 2019-12-06 | Expansive force testing mechanism |
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| CN110779650A true CN110779650A (en) | 2020-02-11 |
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| CN201911240175.9A Pending CN110779650A (en) | 2019-12-06 | 2019-12-06 | Expansive force testing mechanism |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112050983A (en) * | 2020-09-25 | 2020-12-08 | 核工业西南物理研究院 | Large expansion bolt expansion force testing device and method |
| CN113777276A (en) * | 2021-09-15 | 2021-12-10 | 郑州大学 | Device and method for testing expansion acting force of high polymer grouting material on soil body |
| CN114323934A (en) * | 2021-11-25 | 2022-04-12 | 广东粤海水务投资有限公司 | Expansive force testing system based on contact surface of high polymer and concrete pipeline |
-
2019
- 2019-12-06 CN CN201911240175.9A patent/CN110779650A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112050983A (en) * | 2020-09-25 | 2020-12-08 | 核工业西南物理研究院 | Large expansion bolt expansion force testing device and method |
| CN113777276A (en) * | 2021-09-15 | 2021-12-10 | 郑州大学 | Device and method for testing expansion acting force of high polymer grouting material on soil body |
| CN113777276B (en) * | 2021-09-15 | 2023-10-03 | 郑州大学 | Device and method for testing expansion acting force of high polymer grouting material on soil body |
| CN114323934A (en) * | 2021-11-25 | 2022-04-12 | 广东粤海水务投资有限公司 | Expansive force testing system based on contact surface of high polymer and concrete pipeline |
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