CN113865982A - Device and method for detecting anti-pushing capacity of handrail - Google Patents
Device and method for detecting anti-pushing capacity of handrail Download PDFInfo
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0041—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress
- G01M5/005—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress by means of external apparatus, e.g. test benches or portable test systems
- G01M5/0058—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress by means of external apparatus, e.g. test benches or portable test systems of elongated objects, e.g. pipes, masts, towers or railways
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
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Abstract
A device and a method for detecting the anti-pushing capability of a railing belong to the field of railing detection, and the device comprises a thrust system, a sensor and an auxiliary claw system, wherein the thrust system is used for generating forward thrust on the detected railing, the thrust system is provided with the sensor, and the sensor is used for detecting displacement and thrust generated by the thrust system; the auxiliary claw systems are symmetrically connected to two sides of the thrust system, and grab the detected railing and generate a reverse acting force of the forward thrust under the action of the thrust system; the invention takes the whole handrail as a test object under the condition of keeping the original shape of the handrail, does not damage the structure of the handrail, reduces the time and cost for preparation and repair, and has more real and reliable evaluation result.
Description
Technical Field
The invention relates to the field of measurement, in particular to a device and a method for detecting the anti-pushing capacity of a handrail.
Background
The truncation method is the most common method for detecting the anti-pushing capability of the current handrail. When the method is adopted for detection, the handrail is cut off from the upright post at the selected test position, and the handrail detection unit with the length of about 1m is obtained for carrying out a thrust test. Because the handrail of the detected section after being cut off is independent of surrounding handrails, the horizontal thrust can be conveniently applied according to the standard, the direct deformation data can be obtained, the anti-thrust capability of the handrail can be directly calculated according to the standard, and the qualification judgment can be carried out. However, the method increases the work of test preparation, railing breakage and recovery, and more importantly, the stress condition of the railing is different from the real condition during testing, and the individual qualified objects can be misjudged as unqualified objects.
At present, the rail nondestructive testing device is also provided, but the force application device needs to be placed on the ground, in order to prevent the device from retreating due to the reaction force, the force application device needs to be drilled on site and fastened on the ground by using a ground foot screw, the detection workload is increased, the ground is damaged, and the devices of the types are complex in structure and difficult to install.
Disclosure of Invention
Based on the technical problems, the invention provides a device and a method for detecting the anti-pushing capacity of a handrail.
The technical scheme of the invention is as follows:
a device for detecting the anti-pushing capability of a railing comprises a pushing system, a sensor and an auxiliary claw system,
the thrust system is used for generating positive horizontal thrust to the detected railing, and a sensor is arranged on the thrust system and used for detecting displacement and thrust generated by the thrust system;
the auxiliary claw systems are symmetrically connected to two sides of the thrust system, the auxiliary claw systems grab the detected railing and generate reverse acting force of the forward horizontal thrust under the action of the thrust system.
Further, the thrust system includes frame, thrust structure and flexible claw, the thrust structure sets up in the frame, flexible claw is connected the thrust structure, flexible claw acts on thrust under the effect of thrust structure and is surveyed the railing.
Furthermore, the thrust structure comprises a rotating arm, a handle, a rotating nut, a fixed structure, a movable lead screw and an anti-rotation sliding block, wherein one end of the rotating nut is connected with the rotating arm, the handle is arranged on the rotating arm, the other end of the rotating nut is connected with the rack through the fixed structure, one end of the movable lead screw is in threaded connection with the rotating nut, the other end of the movable lead screw is connected with the anti-rotation sliding block, and the anti-rotation sliding block is connected with the telescopic claw;
the rack is provided with a sliding groove, and the anti-rotation sliding block slides in the sliding groove to prevent the movable screw rod from rotating.
Further, fixed knot constructs including bearing, bearing frame and end cover, the bearing housing is established rotate on the nut, the bearing passes through bearing frame fixed connection and is in the frame, the end cover with the bearing frame is connected.
Furthermore, the sensor comprises a displacement sensor and a pressure sensor, the displacement sensor is sleeved on the rotating nut and used for detecting the number of rotating turns of the rotating nut, and a sleeve is arranged between the displacement sensor and the fixed structure;
the pressure sensor is arranged between the movable screw rod and the anti-rotation sliding block and used for detecting the forward thrust generated by the thrust system.
Furthermore, the auxiliary claw system comprises a pair of supporting structures and a pair of auxiliary claws, the auxiliary claws are symmetrically arranged on two sides of the thrust system through the supporting structures, each supporting structure comprises a supporting long arm and a supporting short arm, one end of each supporting long arm is hinged to the fixed structure, the other end of each supporting long arm is hinged to the auxiliary claw, one end of each supporting short arm is hinged to the corresponding supporting long arm, the other end of each supporting short arm is hinged to the rack, and the auxiliary claws and the telescopic claws are located on the same straight line.
Furthermore, the telescopic claw is in V-shaped contact with the detected railing; the auxiliary claw is also in V-shaped contact with the railing to be measured.
A detection method based on the anti-pushing capacity detection device comprises the following steps:
step 1: reversing the handle to enable the telescopic claw to retract to the initial end, and initializing the sensor;
step 2: the handle is rotated forwards to enable the telescopic claw to abut against the detected handrail, the handle is rotated forwards continuously, when the reading of the pressure sensor reaches the equivalent thrust value, the handle is stopped to rotate, and the reading of the displacement sensor is recorded;
the equivalent calculation formula of the reading of the pressure sensor and the equivalent thrust value is as follows:
wherein q represents an equivalent thrust value, 2F represents the reading number of the pressure sensor, L represents the distance between the tested railing column and the telescopic claw, and a represents the distance between the auxiliary claw and the telescopic claw;
and step 3: and judging whether the handrail is qualified or not according to the indication number of the displacement sensor.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
under the condition of keeping the original shape of the handrail, the invention takes the whole handrail as a test object, applies local concentrated load to the handrail by using the detection device disclosed by the invention and detects the deformation of the handrail, thereby judging whether the handrail is qualified. The structure of the handrail is not damaged, the time and cost for preparation and repair are reduced, more importantly, the detection state is consistent with the use state, and the evaluation result is more real and reliable.
The structure of the invention is bow-shaped, the bow-shaped structure can provide supporting counter force by the detected handrail, and has forward force and reverse force, compared with single-side concentrated force detection, the forward force and the reverse force can effectively reduce the damage of the handrail caused by the stress concentration of the single-side concentrated force on the partial handrail.
In addition, the bow-shaped structure also has the following advantages: firstly, on the basis of meeting the detection standard, the required power is smaller, and the device is more suitable for single-person or double-person manual force application detection; secondly, the applicable scene of railing detection is enlarged, and the requirement on the detection site environment is reduced; thirdly, the arch arm structure is a detachable structure, and portability is improved.
The invention adopts the screw rod nut transmission to provide forward thrust, and completes the detection work by converting the rotary motion into the linear motion. Compared with the direct linear motion, the screw rod nut requires less power for transmission, and is more suitable for single or double people; meanwhile, the detection deformation is small, and the detection deformation quantity can be amplified through the transmission of the screw rod nut, so that the detection precision is improved. The screw rod nut transmission has the advantages of compact structure, high structural rigidity and the like.
The telescopic claw, the auxiliary claw and the railing are in V-shaped contact, so that the stress center is on the same straight line, and the detection precision is improved.
The device need not with ground or wall fixed connection, only before applying forward thrust to make supplementary claw and the grasping railing of flexible claw, needs the user to fix the device, after grasping the railing, then does not need the user to fix, only need apply forward thrust can, convenient operation, labour saving and time saving.
The device is not only limited to the situation of applying the thrust in the horizontal direction, but also can be used for applying the vertical direction or other situations with included angles with the vertical direction, and the measurement is more flexible; simultaneously not only be applicable to the condition that detects in the railing, still be applicable to and detect complex conditions such as outside the railing, require lowly to the detection ring border.
Drawings
FIG. 1 is an overall configuration view of a detecting device;
FIG. 2 is a cross-sectional view of a detection device;
FIG. 3 is a front view of the detection device;
FIG. 4 is a top view of the detection device;
FIG. 5 is an overall view of the inspection device with a horizontal support structure;
FIG. 6 is an equivalent diagram A of the detection method;
FIG. 7 is an equivalent diagram B of the detection method;
reference numerals:
1-moving screw rod, 2-rotating nut, 3-bearing seat, 4-bearing, 5-rotating arm, 6-handle shaft, 7-handle, 8-frame, 9-pressure sensor, 10-auxiliary claw, 11-first connecting flange plate, 12-second connecting flange plate, 13-anti-rotating slide block, 14-telescopic claw, 15-horizontal support plate, 16-supporting long arm, 17-supporting short arm, 18-end cover, 19-ground supporting circular tube, 20-base, 21-adjusting structure, 22-displacement sensor and 23-sleeve.
Detailed Description
All features disclosed in this specification may be combined in any combination, except features and/or steps that are mutually exclusive.
The present invention will be described in detail with reference to the accompanying drawings.
Example 1
A device for detecting the anti-pushing capability of a railing comprises a pushing system, a sensor and an auxiliary claw system,
the thrust system is used for producing forward thrust to being surveyed the railing, and thrust system produces forward thrust promptly and makes being surveyed railing atress and produce deformation, and this thrust system need set up at being surveyed railing middle part, the mid point of railing between the coexistence post promptly, not only can be forward horizontal thrust, can also be forward vertical thrust etc..
The thrust system is provided with a sensor, and the sensor is used for detecting displacement and thrust generated by the thrust system.
The auxiliary claw systems are symmetrically connected to two sides of the thrust system, the auxiliary claw systems grab the detected railing and generate reverse acting force of the forward thrust under the action of the thrust system.
This detection device adopts bow type structure, and when thrust system produced forward thrust to being surveyed the railing, supplementary claw system produced reverse acting force, and bow type structure can provide the support counter-force with the help of being examined railing self, has forward force and counter-force, and unilateral concentrated power relatively detects, and forward force and counter-force can effectively reduce the railing destruction that unilateral concentrated power leads to the stress concentration of local railing. On the basis of meeting the detection standard, compared with a ground support type detection instrument, the power required is smaller, and the detection instrument is more suitable for single-person or double-person manual force application detection; the applicable scene of railing detection is enlarged, and the requirement on the detection site environment is reduced.
Example 2
The present embodiment further describes the thrust system.
In this embodiment, the thrust system includes frame 8, thrust structure and flexible claw 14, the thrust structure sets up in the frame 8, flexible claw 14 is connected the thrust structure, flexible claw 14 acts on thrust under the effect of thrust structure by the railing of being surveyed. The thrust structure can adopt screw-nut transmission, rack and pinion transmission and the like, and the preferred spiral transmission that adopts has following advantage:
first, compared with the direct use of linear motion, the screw transmission requires less power and is more suitable for single or double use; meanwhile, the detection deformation is small, and the detection deformation quantity can be amplified through spiral transmission, so that the detection precision is improved. And secondly, compared with gear and rack transmission, the spiral transmission has the advantages of compact structure, high structural rigidity and the like.
Thrust structure includes rotor arm 5, handle 7, handle axle 6, swivel nut 2, fixed knot construct, removes lead screw 1 and prevents changeing slider 13, the one end of rotating nut 2 is connected rotor arm 5, the periphery of rotating nut 2 is square, rotor arm 5 one end is provided with corresponding quad slit, makes rotor arm 5 detachable cover is established rotate on the nut 2, the rotor arm 5 other end passes through handle axle 6 and connects handle 7 rotates handle 7 can make and rotate nut 2 and rotate.
The other end of the rotating nut 2 passes through the fixing structure and is connected with the frame 8, the fixing structure comprises a bearing 4, a bearing seat 3 and an end cover 18, the bearing 4 is sleeved on the rotating nut 2, the bearing 4 is fixedly connected with the frame 8 through the bearing seat 3, and the end cover 18 is connected with the bearing seat 3. In this embodiment, the bearing 4 is an angular contact ball bearing 4, the bearing seat 3 is a square bearing seat 3, the end cover 18 is also a square bearing end cover 18, and the bearing seat 3 is fixed on the frame 8 through a screw and a nut.
One end of the movable lead screw 1 is in threaded connection with the rotating nut 2, the working stroke of the movable lead screw 1 needs to be larger than the standard deformation of the handrail, when the preset thrust value is reached, the deformation of the handrail exceeds the standard deformation, and the handrail is unqualified. The other end of the movable screw rod 1 is connected with the anti-rotation sliding block 13, the anti-rotation sliding block 13 is connected with the rack 8, and the anti-rotation sliding block 13 is connected with the telescopic claw 14. A sliding groove is formed in the rack 8, and the anti-rotation sliding block 13 slides in the sliding groove to prevent the movable screw rod 1 from rotating.
The working process of the thrust system is as follows: the handle 7 is rotated, the handle 7 drives the rotating nut 2 to rotate under the action of the rotating arm 5, and the rotating sliding block 13 is arranged on the moving screw rod 1, so that the moving screw rod 1 can move back and forth in the rack 8 relative to the rotating nut 2, the moving screw rod 1 is connected with a telescopic claw 14, and the thrust is transmitted to the detected railing through the telescopic claw 14.
Example 3
In this embodiment, a sensor is specifically explained based on embodiment 2.
The sensor comprises a displacement sensor 22 and a pressure sensor 9, the displacement sensor 22 is sleeved on the rotating nut 2, and a sleeve 23 is arranged between the displacement sensor 22 and the fixed structure; displacement sensor 22 is used for detecting 2 pivoted turns of swivel nut, is provided with the arch on this swivel nut 2, is provided with corresponding recess on the displacement sensor 22, and displacement sensor 22 selects the circle calibrated scale in this embodiment, and the cover is established on swivel nut 2, when swivel nut 2 rotates, can drive the circle calibrated scale rotates, through the registration on the circle calibrated scale, can reachd this swivel nut 2 pivoted turns, and then calculates the displacement volume that removes lead screw 1 according to the pitch of swivel nut 2, and this displacement volume is the deflection of railing promptly.
The pressure sensor 9 is arranged between the movable screw rod 1 and the anti-rotation sliding block 13 and is used for detecting the forward thrust generated by the thrust system. One side of the pressure sensor 9 is connected with the movable screw rod 1 through a first connecting flange plate 11, and the other side of the pressure sensor 9 is connected with the anti-rotation sliding block 13 through a second connecting flange plate 12. The pressure sensor 9 can detect the forward thrust applied to the handrail.
Example 4
This embodiment will further explain the auxiliary jaw system based on embodiment 3.
The auxiliary jaw system comprises a pair of supporting structures and a pair of auxiliary jaws 10, the auxiliary jaws 10 are symmetrically arranged on two sides of the thrust system through the supporting structures, each supporting structure comprises a long supporting arm 16 and a short supporting arm 17, and one end of each long supporting arm 16 is hinged to the bearing block 3 of the fixed structure;
one end of the short supporting arm 17 is hinged to the long supporting arm 16, and the other end of the short supporting arm 17 is hinged to the rack 8. The short support arm 17 can not only fix the long support arm 16 during measurement, but also increase the strength of the long support arm 16.
The auxiliary claws 10 and the telescopic claws 14 are located on the same straight line, and the distance between the two auxiliary claws 10 is 1 meter in this embodiment. The telescopic claw 14 is in V-shaped contact with the railing to be detected; that is, the telescopic claw 14 includes two force-bearing surfaces, and the force-bearing point and the force-bearing center of the force-bearing surfaces are V-shaped. The auxiliary claw 10 is also in V-shaped contact with the railing to be measured, and the auxiliary claw 10 is hexagonal without a lower edge due to the fact that the auxiliary claw 10 generates reverse thrust, and comprises two V-shaped structures, so that the stress center of the stress center telescopic claw 14 of the auxiliary claw 10 can be kept on the same straight line, and the measuring accuracy is improved.
Example 5
This embodiment is used to measure the forward horizontal thrust, keep the measuring device horizontal and provide a certain support, a horizontal support structure is therefore provided below the thrust system, said horizontal support structure comprising a horizontal support plate 15, a ground support circular tube 19, an adjustment structure 21 and a base 20, the thrust system is connected above the horizontal support plate 15, the lower part of the horizontal support plate 15 is connected to the upper end of a ground support circular tube 19, an adjusting structure 21 is arranged on the ground support circular tube 19, the adjusting structure 21 can be adjusted by using a nut, the lower end of the ground supporting round tube 19 is connected with the base 20, since the thrust system is only placed on the horizontal support plate 15, the horizontal support structure is only used for ensuring that the measuring device is horizontal, and plays a certain supporting role, so that the base 20 does not need to be fixedly connected with the ground.
Example 6
The embodiment provides a thrust resistance detection method based on embodiments 1 to 5, in which a telescopic claw 14 of the detection device is located at the midpoint of a rail to be detected, auxiliary claws 10 are distributed on both sides of the telescopic claw 14, and the detection method includes the following steps:
step 1: reversing the handle 7 to retract the telescopic claw 14 to the initial end and initializing the sensor;
step 2: the handle 7 is rotated forward, so that the telescopic claw 14 is abutted against the detected railing, and the displacement sensor 22 indicates a number a _ 0; continuously and positively rotating the handle 7, stopping rotating the handle 7 when the reading of the pressure sensor 9 reaches the equivalent thrust value, recording the reading of the displacement sensor 22, and recording the reading a _1 of the displacement sensor 22;
wherein, because pressure sensor 9 detects concentrated force, and thrust is the distributed force in the standard, consequently need convert pressure sensor 9 registration into distributed force (equivalent thrust value), the computational formula is:
wherein q represents the equivalent thrust value, 2F represents the reading number of the pressure sensor 9, L represents the distance between the tested railing post and the telescopic claw 14, and a represents the distance between the auxiliary claw 10 and the telescopic claw 14;
and step 3: according to the indication numbers a _0 and a _1 of the displacement sensor 22, whether the handrail is qualified or not can be judged.
The method is not only suitable for judging whether the handrail is qualified or not by judging whether the indication of the displacement sensor exceeds the standard value when the indication of the pressure sensor reaches the standard value. When the reading of the displacement sensor reaches the standard value, whether the handrail is qualified or not is judged by judging whether the reading of the pressure sensor exceeds the standard value or not.
Example 7
This embodiment is based on embodiment 6, and is used to specifically describe a calculation method for converting a concentrated force into a distributed force.
Because the handrail works in the elastic range, the deflection of the handrail at the point A in the figure 6 is the maximum deformation of the model according to the elastic stability theory, and the corner of the point A shown in the figure 6 is necessarily zero according to the symmetry principle. Consider the right half segment, as shown in FIG. 7; after the force application is finished, the middle point A is regarded as a fixed end, the downward acting force of the right-end hinge C point is F, and the acting force of the auxiliary claw at the position B point is also F.
In FIG. 7, the deflection w of the point CCComprises the following steps:
where EI denotes the bending stiffness.
Deflection w at BθComprises the following steps:
relative deflection w between BCBCComprises the following steps:
deflection w of B relative to ABComprises the following steps:
according to the principle of equal deformation, i.e. | wq|＝|wAI, have
After finishing, has
Since L, a is a constant, the concentrated load and the distributed load are in a linear relationship, which can improve the measurement accuracy of the detecting instrument and facilitate the subsequent data processing and the deep analysis of the stress-deformation condition.
Example 8
The embodiment is based on the above embodiment, wherein the displacement sensor selects an encoder, preferably is a photoelectric rotary encoder, the encoder and the pressure sensor are directly connected to the computer through corresponding interfaces, the computer collects displacement data and thrust data, so that the computer can calculate and display the deformation amount of the handrail and the distribution force load obtained through conversion in real time, a user only needs to pay attention to the data displayed by the computer, simultaneously rotates the handle, stops rotating the handle after reaching the standard distribution force load (deformation amount), judges whether the deformation amount (distribution force load) exceeds the standard value, if the deformation amount (distribution force load) exceeds the standard value, the handrail is unqualified, and if not, the handrail is qualified. The computer can set functions such as alarming and prompting at the same time, corresponding results can be obtained without manual calculation or table lookup of a user, and the computer is high in universality and convenient and fast to operate.
The above description is an embodiment of the present invention. The present invention is not limited to the above embodiments, and any structural changes made under the teaching of the present invention shall fall within the protection scope of the present invention, which is similar or similar to the technical solutions of the present invention.
Claims (8)
1. A device for detecting the anti-pushing capability of a railing is characterized by comprising a pushing system, a sensor and an auxiliary claw system,
the thrust system is used for generating positive thrust to the detected handrail, and a sensor is arranged on the thrust system and used for detecting displacement and thrust generated by the thrust system;
the auxiliary claw systems are symmetrically connected to two sides of the thrust system, the auxiliary claw systems grab the detected railing and generate reverse acting force of the forward thrust under the action of the thrust system.
2. The device for detecting the pushing resistance of the handrail as claimed in claim 1, wherein the pushing system comprises a frame (8), a pushing structure and a telescopic claw (14), the pushing structure is arranged in the frame (8), the telescopic claw (14) is connected with the pushing structure, and the telescopic claw (14) applies a pushing force to the handrail to be detected under the action of the pushing structure.
3. The detection device for the anti-pushing capacity of the handrail as claimed in claim 2, wherein the pushing structure comprises a rotating arm (5), a handle (7), a rotating nut (2), a fixed structure, a movable lead screw (1) and an anti-rotating slider (13), one end of the rotating nut (2) is connected with the rotating arm (5), the handle (7) is arranged on the rotating arm (5), the other end of the rotating nut (2) is connected with the frame (8) through the fixed structure, the movable lead screw (1) is in threaded connection with the rotating nut (2), the other end of the movable lead screw (1) is connected with the anti-rotating slider (13), and the anti-rotating slider (13) is connected with the telescopic claw (14);
a sliding groove is formed in the rack (8), and the anti-rotation sliding block (13) slides in the sliding groove to prevent the movable screw rod (1) from rotating.
4. The device for detecting the pushing resistance of the handrail as claimed in claim 3, wherein the fixing structure comprises a bearing (4), a bearing seat (3) and an end cap (18), the bearing (4) is sleeved on the rotating nut (2), the bearing (4) is fixedly connected to the frame (8) through the bearing seat (3), and the end cap (18) is connected to the bearing seat (3).
5. A device for detecting the pushing resistance of a handrail as claimed in claim 3, wherein the sensor comprises a displacement sensor (22) and a pressure sensor (9), the displacement sensor (22) is sleeved on the rotating nut (2), the displacement sensor (22) is used for detecting the number of turns of the rotating nut (2), and a sleeve (23) is arranged between the displacement sensor (22) and the fixed structure;
the pressure sensor (9) is arranged between the movable screw rod (1) and the anti-rotation sliding block (13) and used for detecting the forward thrust generated by the thrust system.
6. A handrail anti-push capability detection device according to claim 3, wherein the auxiliary claw system comprises a pair of support structures and a pair of auxiliary claws (10), the auxiliary claws (10) are symmetrically arranged at two sides of the thrust system through the support structures, the support structures comprise a long support arm (16) and a short support arm (17), one end of the long support arm (16) is hinged to the fixed structure, the other end of the long support arm (16) is hinged to the auxiliary claw (10), one end of the short support arm (17) is hinged to the long support arm (16), the other end of the short support arm (17) is hinged to the frame (8), and the auxiliary claw (10) and the telescopic claw (14) are positioned on the same straight line.
7. The device for detecting the pushing resistance of the handrail as claimed in claim 6, wherein the telescopic claw (14) is in V-shaped contact with the handrail to be detected; the auxiliary claw (10) is in V-shaped contact with the railing to be detected.
8. A detection method based on the thrust resistance detection device of any one of claims 1 to 7, characterized by comprising the following steps:
step 1: reversing the handle (7) to enable the telescopic claw (14) to retract to the initial end and initialize the sensor;
step 2: the handle (7) is rotated forwards, the telescopic claw (14) abuts against the detected railing, the handle (7) is rotated forwards continuously, when the reading of the pressure sensor (9) reaches the equivalent thrust value, the handle (7) stops rotating, and the reading of the displacement sensor (22) is recorded;
the equivalent calculation formula of the reading of the pressure sensor (9) and the equivalent thrust value is as follows:
wherein q represents an equivalent thrust value, 2F represents the reading number of the pressure sensor (9), L represents the distance between the tested railing post and the telescopic claw (14), and a represents the distance between the auxiliary claw (10) and the telescopic claw (14);
and step 3: and judging whether the railing is qualified or not according to the indication number of the displacement sensor (22).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114654219A (en) * | 2022-05-26 | 2022-06-24 | 山东建筑大学 | Mechanical hand for screwing special-shaped nut |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114654219A (en) * | 2022-05-26 | 2022-06-24 | 山东建筑大学 | Mechanical hand for screwing special-shaped nut |
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