CN109839060B - Steel cap installation centering deflection detection device based on capacitance change principle - Google Patents
Steel cap installation centering deflection detection device based on capacitance change principle Download PDFInfo
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Abstract
Steel cap installation centering deflection detection device based on electric capacity change principle relates to steel cap installation technical field, comprising a base plate, the middle part swing joint of bottom plate has the motion, the shape of bottom plate is circular, the positive swing joint of motion has driven screw thread subassembly, the inner wall of driven screw thread subassembly is provided with the screw thread, the middle part swing joint of driven screw thread subassembly has the screw rod, the screw rod is located the inside of driven screw thread subassembly and rather than the looks adaptation, the positive swing joint of bottom plate has three stopper. This steel cap installation centering deflection detection device based on capacitance change principle, when taking place position change between activity polar plate and the fixed polar plate, just can change the area between the two this moment, and then change the capacitance, the material has taken place the deflection this moment promptly, measures through the change to the capacitance, can be quick detect the position form of material, has improved the device's accuracy.
Description
Technical Field
The invention relates to the technical field of steel cap installation, in particular to a steel cap installation centering deflection detection device based on a capacitance change principle.
Background
The steel cap is generally used for carrying out the shutoff to the both ends of opening pipeline and seals, need fix both together through the welded mode in the installation, need guarantee the concentricity between steel cap and the pipeline at this in-process, if the concentricity is relatively poor between the two then probably cause to weld to have the clearance between the finished product, influence the leakproofness of product, lead to the risk that probably takes place to leak in the use, and simultaneously, if the steel cap takes place to deflect in the installation, then probably lead to the solder joint unstability or the welding seam is inhomogeneous, can cause the emergence of the condition of leaking welding even, stability in the follow-up use has caused certain influence.
In order to solve the problems, the inventor provides a steel cap installation centering deflection detection device based on a capacitance change principle, the steel cap installation centering deflection detection device has the advantages of self-centering and deflection detection, can ensure automatic centering between a material and an installation surface in the installation process, and can monitor and early warn the deflection conditions of the material and the steel cap in real time.
Disclosure of Invention
In order to achieve the purpose of the self-centering and deflection detection, the invention provides the following technical scheme: the steel cap installation centering deflection detection device based on the capacitance change principle comprises a bottom plate, a moving mechanism, a driven threaded assembly, a screw rod, a limiting block, a clamping column, a positioning seat, a fixing seat, a material, a cavity, a shaft sleeve, a transmission shaft, a movable polar plate and a fixed polar plate.
Wherein: the motion mechanism comprises a movable plate, a positioning claw and a positioning groove.
The position and connection relationship among the structures are as follows:
the middle part swing joint of bottom plate has the motion, the shape of bottom plate is circular, the positive swing joint of motion has driven screw assembly, driven screw assembly's inner wall is provided with the screw thread, driven screw assembly's middle part swing joint has the screw rod, the screw rod is located driven screw assembly's inside and rather than the looks adaptation, the positive swing joint of bottom plate has three stopper, and is three the shape specification homogeneous phase of stopper is the same, stopper position arc structure and the centre of a circle are the same point with the centre of a circle of bottom plate, and is three promptly the stopper is the same to the distance of bottom plate axis, and adjacent two interval between the stopper is the same, and is three promptly the stopper uses the axis of bottom plate to be evenly distributed for referring to.
The outer side of the movement mechanism is movably connected with three clamping columns, the shape and specification of the three clamping columns are the same, one end, far away from the movement mechanism, of each clamping column is of a curved surface structure, the curved surface degree of each clamping column is the same as that of each positioning seat, the three clamping columns correspond to the three positioning seats respectively, namely the distance between every two adjacent clamping columns is the same as that between every two adjacent positioning seats, the distance between the end points of the three clamping columns and the center of the movement mechanism is the same, and the three clamping columns are uniformly distributed by taking the middle point of the movement mechanism as a reference.
The outer sides of the clamping columns are movably connected with positioning seats, the three positioning seats are the same in shape and specification, one ends, far away from the center of the bottom plate, of the positioning seats are of curved surface structures, the curved surface degrees are the same as those of the top ends of the clamping columns, the distances between every two adjacent positioning seats are the same, namely the three positioning seats are uniformly distributed by taking the central axis of the bottom plate as reference, the distances from the end points of the three positioning seats to the middle point of the bottom plate are the same, the left side and the right side of each positioning seat are fixedly connected with the fixing seats, and the outer sides of the.
The utility model discloses a portable energy-saving device, including bottom plate, shaft sleeve, movable polar plate, transmission shaft, movable polar plate and transmission shaft, the back fixedly connected with cavity of bottom plate, the right side swing joint of cavity has the shaft sleeve, the inside swing joint of shaft sleeve has the transmission shaft, the axis of bottom plate, motion, driven screw thread subassembly, screw rod, cavity, shaft sleeve and transmission shaft is on same straight line, the outside swing joint of transmission shaft has movable polar plate, the outside swing joint of movable polar plate has fixed polar plate, movable polar plate and fixed polar plate all are located the inside of shaft sleeve, movable polar plate and transmission shaft swing joint, the inner wall fixed connection of fixed polar plate and shaft sleeve, movable polar plate and fixed polar plate are two concentric semicircle ring structures, the diameter of movable polar plate is the twice of fixed polar.
The moving mechanism comprises a movable plate, the bottom of the movable plate is fixedly connected with three positioning claws, the three positioning claws are uniformly distributed by taking the middle point of the movable plate as a reference, namely, the distances between every two adjacent positioning claws are the same, the distances from the three positioning claws to the middle point of the movable plate are the same, the three clamping columns respectively correspond to the three positioning claws, and positioning grooves are formed in the positioning claws.
Preferably, the distance between two adjacent limiting blocks is the same as the distance between two adjacent positioning seats, that is, the angle between two adjacent limiting blocks is equal to the angle between two adjacent positioning seats.
Preferably, the axle wire of the shaft sleeve, the transmission shaft, the movable polar plate and the fixed polar plate are on the same straight line.
Preferably, the depth of the cavity is greater than the sum of the heights of the movable plate and the positioning pawl.
Preferably, the screw rod is movably connected with the transmission shaft, the screw rod and the transmission shaft have the same diameter, the central axes of the screw rod and the transmission shaft are on the same straight line, and the transmission shaft penetrates through and extends to the outer side of the cavity.
Preferably, the limiting blocks are movably connected with the bottom plate through two bolts, three groups of strip-shaped screw holes are formed in the surface of the bottom plate, and the three groups of strip-shaped screw holes correspond to the three limiting blocks respectively.
Compared with the prior art and products, the invention has the beneficial effects that:
1. the steel cap installation centering deflection detection device based on the capacitance change principle comprises a bottom plate, can provide support for the whole device and maintain the stable connection among all structures, ensures that the use precision is not influenced due to the deflection of the structures in the working process, and has good stability and stability, the principle of the bolt and the nut can be utilized to drive the driven screw thread component to move through the rotation of the screw rod, the operability of the device is improved, the limiting blocks are movably connected with the bottom plate by two bolts, three groups of strip-shaped screw holes are arranged on the surface of the bottom plate, the three groups of strip-shaped screw holes respectively correspond to the three limiting blocks, when the diameter of the material is smaller than the minimum distance between the three positioning seats, the positions of the three limiting blocks are changed, the device is suitable for small-sized materials, the practicability and the applicability of the device are improved, and the utilization rate of the device is improved.
2. The steel cap installation centering deflection detection device based on the capacitance change principle can drive three clamping columns to move through a movement mechanism, because the three clamping columns have the same shape and specification, one end of each clamping column, which is far away from the movement mechanism, is of a curved surface structure, the curved surface degree of each clamping column is the same as that of each positioning seat, the three clamping columns respectively correspond to the three positioning seats, namely the distance between every two adjacent clamping columns is the same as that between every two adjacent positioning seats, the distance between the end points of the three clamping columns and the center of the movement mechanism is the same, namely the three clamping columns are uniformly distributed by taking the midpoint of the movement mechanism as a reference, the three positioning claws are uniformly distributed by taking the midpoint of a movable plate as a reference, namely the distance between every two adjacent positioning claws is the same, the distances between the three positioning claws and the midpoint of the movable plate are the same, the three clamping columns respectively correspond to the three positioning claws, and therefore, the self-centering device can achieve the self-centering purpose, avoid errors caused by non-centering in the installation process, and improve the use precision of the device.
3. The steel cap installation centering deflection detection device based on the capacitance change principle can accurately and visually detect whether materials deflect by utilizing the principle that the deflection is influenced by the change of the dead area, the movable polar plate and the fixed polar plate are both positioned in the shaft sleeve and are movably connected with the transmission shaft, the fixed polar plate is fixedly connected with the inner wall of the shaft sleeve, the movable polar plate and the fixed polar plate are of two concentric semicircular structures, the diameter of the movable polar plate is twice of that of the fixed polar plate, the movable polar plate is inserted in the middle of the fixed polar plate and is tightly attached to the fixed polar plate, the position between the movable polar plate and the fixed polar plate is relatively stable under the normal state, the dead area between the movable polar plate and the fixed polar plate is not changed, the capacitance is not changed at the moment, namely, the deflection of the materials is not generated, when the position between the movable polar plate and the fixed polar, the dead area between the two can change at this moment, and then change the electric capacity, and the material has deflected this moment promptly, through measuring the change of electric capacity, can be quick detect the position form of material, has improved the accuracy of device.
Drawings
FIG. 1 is a top view of the connection structure of the present invention, wherein the structures are in an initial state, i.e., the distance between the three posts is relatively stable;
FIG. 2 is a left side view of the connection structure of the present invention;
FIG. 3 is a top view of the connection structure of the three clamping columns and the positioning seat of the present invention, wherein the three clamping columns are at the initial positions, i.e. the distances between the three clamping columns are small;
FIG. 4 is a schematic diagram of the movement traces of the locking posts and the positioning seat according to the present invention, wherein the distances between the three locking posts are increased in the adjusted state between the structures;
FIG. 5 is a schematic view of a connection structure of the locking post and the positioning pawl of the present invention, wherein the locking post and the positioning pawl are both in original positions, and the distance between the three locking posts is small;
FIG. 6 is a schematic diagram of the movement traces of the locking posts and the positioning pawls, wherein the locking posts and the positioning pawls move, and the distances between the three locking posts increase;
FIG. 7 is a schematic view of a connection structure of a movable plate and a fixed plate according to the present invention, wherein the movable plate and the fixed plate are at an initial position, i.e., a facing area therebetween is stable, and capacitance is not changed, i.e., indicating that the material is not deflected;
FIG. 8 is a schematic diagram I of the movement traces of the movable polar plate and the fixed polar plate of the present invention, at this time, the movable polar plate and the fixed polar plate generate relative movement, the movable polar plate rotates clockwise, that is, the angle between the movable polar plate and the fixed polar plate is increased, the facing area is reduced, at this time, the capacitance is reduced, that is, the material deflects;
FIG. 9 is a schematic diagram of the moving traces of the movable plate and the fixed plate according to the present invention, in which the angle between the movable plate and the fixed plate is further increased, and the facing area is further decreased, i.e. the capacitance is further decreased than that of FIG. 8, which indicates that the material deflection amplitude is larger than that of FIG. 8;
FIG. 10 is a third schematic diagram of the movement traces of the movable polar plate and the fixed polar plate of the present invention, wherein the movable polar plate rotates counterclockwise, the principle and the process are the same as those of FIGS. 8 and 9, i.e., the material is deflected;
FIG. 11 is a top view of the connection structure of the limiting blocks and the bottom plate, at this time, the two are in the initial positions, and the distance between the three limiting blocks is small;
fig. 12 is a schematic diagram of the motion trajectory of the limiting blocks, at this time, the positions of the limiting blocks on the bottom plate are changed, that is, the distances between the three limiting blocks are increased.
In the figure: 1-bottom plate, 2-motion mechanism, 3-driven screw assembly, 4-screw, 5-limiting block, 6-clamping column, 7-positioning seat, 8-fixing seat, 9-material, 10-cavity, 11-shaft sleeve, 12-transmission shaft, 13-movable polar plate, 14-fixed polar plate, 21-movable plate, 22-positioning claw and 23-positioning groove.
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.
Please refer to fig. 1-12:
the steel cap installation centering deflection detection device based on the capacitance change principle comprises a bottom plate 1, a moving mechanism 2, a driven threaded component 3, a screw rod 4, a limiting block 5, a clamping column 6, a positioning seat 7, a fixing seat 8, a material 9, a cavity 10, a shaft sleeve 11, a transmission shaft 12, a movable polar plate 13 and a fixed polar plate 14.
Wherein: the moving mechanism 2 includes a movable plate 21, a positioning pawl 22, and a positioning groove 23.
Wherein:
a. activity polar plate 13 and fixed polar plate 14 all are located the inside of axle sleeve 11, activity polar plate 13 and transmission shaft 12 swing joint, the inner wall fixed connection of fixed polar plate 14 and axle sleeve 11, activity polar plate 13 and fixed polar plate 14 are two concentric semicircle ring structures, the diameter of activity polar plate 13 is the twice of fixed polar plate 14 diameter, activity polar plate 13 pegs graft at the middle part of fixed polar plate 14 and the two closely laminates, the distance between two adjacent stopper 5, the same with the distance between two adjacent positioning seats 7, the angle between two adjacent stopper 5 equals the angle between two adjacent positioning seats 7 promptly.
b. The three positioning claws 22 are uniformly distributed by taking the middle point of the movable plate 21 as a reference, namely, the distance between two adjacent positioning claws 22 is the same, the distance from the three positioning claws 22 to the middle point of the movable plate 21 is the same, the three clamping columns 6 correspond to the three positioning claws 22 respectively, the limiting blocks 5 are movably connected with the bottom plate 1 through two bolts, three groups of strip-shaped screw holes are formed in the surface of the bottom plate 1, and the three groups of strip-shaped screw holes correspond to the three limiting blocks 5 respectively.
c. The three clamping columns 6 are identical in shape and specification, one end, far away from the moving mechanism 2, of each clamping column 6 is of a curved surface structure, the curved surface degree of each clamping column 6 is identical to that of each positioning seat 7, the three clamping columns 6 correspond to the three positioning seats 7 respectively, namely the distance between every two adjacent clamping columns 6 is identical to that between every two adjacent positioning seats 7, the distances from the end points of the three clamping columns 6 to the center of the moving mechanism 2 are identical, and the three clamping columns 6 are evenly distributed by taking the middle point of the moving mechanism 2 as a reference.
Wherein:
d. screw rod 4 and transmission shaft 12 swing joint, the same and axis of diameter of screw rod 4 and transmission shaft 12 is on same straight line, and transmission shaft 12 runs through and extends to the outside of cavity 10, the shape specification of three positioning seat 7 is the same, the one end that bottom plate 1 center was kept away from to positioning seat 7 is the curved surface structure, and the curved surface degree is the same with the curved surface degree on card post 6 top, the interval between two adjacent positioning seats 7 is the same, three positioning seat 7 uses the axis of bottom plate 1 to be evenly distributed as the reference promptly, and the distance of the extreme point of three positioning seat 7 to bottom plate 1 mid point is the same.
e. The central axes of the bottom plate 1, the moving mechanism 2, the driven threaded component 3, the screw rod 4, the cavity 10, the shaft sleeve 11 and the transmission shaft 12 are on the same straight line, the shape of the bottom plate 1 is circular, the inner wall of the driven threaded component 3 is provided with threads, the screw rod 4 is positioned in the driven threaded component 3 and is matched with the screw rod, and the central axes of the shaft sleeve 11, the transmission shaft 12, the movable polar plate 13 and the fixed polar plate 14 are on the same straight line.
f. The degree of depth of cavity 10 is greater than the high sum of fly leaf 21 and locating pawl 22, and the shape specification of three stopper 5 is all the same, and 5 arc structures of stopper and the centre of a circle are the same point with the centre of a circle of bottom plate 1, and three stopper 5 is the same to the distance of bottom plate 1 axis promptly to interval between two adjacent stoppers 5 is the same, and three stopper 5 uses the axis of bottom plate 1 to be evenly distributed as the reference promptly.
In use, the initial positions and connections between the structures are as follows:
the transmission shaft 12 is inserted in the movable polar plate 13 and is rotatably connected with the movable polar plate, the movable polar plate 13 is inserted in the fixed polar plate 14 and is slidably connected with the fixed polar plate, the fixed polar plate 14 is located in the shaft sleeve 11 and is fixedly welded with the fixed polar plate, the transmission shaft 12 is movably connected with the screw rod 4 and the screw rod 4 is inserted in the driven threaded component 3, the driven threaded component 3 is movably connected with the movable plate 21 through screws, the three positioning claws 22 are movably hinged with the three clamping columns 6 respectively, the three positioning claws 22 are fixedly welded with the movable plate 21, the three clamping columns 6 are located in the three positioning seats 7 respectively and are movably inserted with the three clamping columns 6, and the three limiting blocks 5 are movably connected with the bottom plate 1 through.
The above structure and process are shown in fig. 1-2, fig. 5 and fig. 7.
The screw rod 4 can be driven to synchronously rotate by clockwise rotating the transmission shaft 12, and the principle of the bolt and the nut can drive the driven threaded component 3 to horizontally move rightwards when the screw rod 4 rotates clockwise, and the driven threaded component 3 is movably connected with the movable plate 21 through the connection relation, so that the movable plate 21 can be driven to synchronously move in the same direction when the driven threaded component 3 moves, namely the movable plate 21 horizontally moves rightwards at the moment.
When the movable plate 21 moves horizontally rightwards, the three positioning claws 22 and the positioning grooves 23 can be driven to synchronously move in the same direction, the three clamping columns 6 are respectively movably hinged with the three positioning claws 22, and the positioning grooves 23 are in inclined structures inclined inwards, so that the three clamping columns 6 contract synchronously inwards at the moment, namely, the distance between the three clamping columns 6 is reduced, and similarly, when the transmission shaft 12 rotates anticlockwise, the three clamping columns 6 can be driven to synchronously move outwards through the processes and the principle, namely, the distance between the three clamping columns 6 is increased.
Through making three card post 6 synchronous motion and making it be concentric state with bottom plate 1 under initial condition, can guarantee that three card post 6 contacts with material 9 inner wall simultaneously, and then guarantees through the state of chucking that it is concentric state between material 9 and the bottom plate 1.
The above structure and process are shown in FIGS. 3-6.
Because the three clamping columns 6 are in contact with the material 9, when the material 9 deflects, the movable plate 21 can be driven by the clamping columns 6 to move synchronously, and then the movable plate 21 can drive the screw 4 and the transmission shaft 12 to move synchronously, and according to the position and the connection relation, the movable plate 13 is connected with the transmission shaft 12, so that the transmission shaft 12 can drive the movable plate 13 to move synchronously.
According to the capacitor capacitance decision formula, when the movable polar plate 13 moves, the opposite area between the movable polar plate and the fixed polar plate 14 changes, at the moment, the capacitance changes, whether the material 9 deflects or not can be visually reflected by detecting the capacitance, and the larger the moving amplitude of the movable polar plate 13 is, the smaller the opposite area between the movable polar plate and the fixed polar plate is, the smaller the capacitance is, and the deflection degree of the material 9 can be monitored through the change of the capacitance.
The capacitance decision is as follows:
in the formula:
c: a capacitor;
: a dielectric constant;
s: the facing area, here the contact area between two semicircular polar plates;
k: an electrostatic force constant;
θ: angle of the two plates when moving.
A. If theta is increased, namely the contact area between the two semicircular pole plates is reduced, and the facing area S is reduced at the moment, then
The value of the medium capacitor C is reduced, namely the deflection of the material 9 is represented;
B. if theta is not changed, namely the contact area between the two semicircular polar plates is not changed, and the opposite area S is not changed at the moment, then
The value of the medium capacitance C is unchanged, i.e. the material 9 is deflected.
Please refer to fig. 7-10 for the above structural principle and process.
Attached:
the position of the limiting block 5 on the bottom plate 1 is adjusted, so that the device is suitable for the condition that the diameter of the material 9 is smaller than the minimum diameter of the positioning seat 7.
The above structure and process are shown in FIGS. 11-12.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. Steel cap installation centering deflection detection device based on electric capacity change principle, including bottom plate (1), its characterized in that: the middle part of the bottom plate (1) is movably connected with a movement mechanism (2), the front of the movement mechanism (2) is movably connected with a driven threaded component (3), the middle part of the driven threaded component (3) is movably connected with a screw rod (4), the front of the bottom plate (1) is movably connected with three limiting blocks (5), the outer side of the movement mechanism (2) is movably connected with three clamping columns (6), the outer side of each clamping column (6) is movably connected with a positioning seat (7), the left side and the right side of each positioning seat (7) are fixedly connected with a fixing seat (8), and the outer sides of the three clamping columns (6) are movably connected with materials (9);
the back of the bottom plate (1) is fixedly connected with a cavity (10), the right side of the cavity (10) is movably connected with a shaft sleeve (11), the inside of the shaft sleeve (11) is movably connected with a transmission shaft (12), the outer side of the transmission shaft (12) is movably connected with a movable polar plate (13), and the outer side of the movable polar plate (13) is movably connected with a fixed polar plate (14);
the moving mechanism (2) comprises a moving plate (21), the bottom of the moving plate (21) is fixedly connected with three positioning claws (22), and positioning grooves (23) are formed in the positioning claws (22).
2. The steel cap installation centering deflection detecting device based on capacitance change principle according to claim 1, characterized in that: the central axis of the bottom plate (1), the moving mechanism (2), the driven threaded component (3), the screw rod (4), the cavity (10), the shaft sleeve (11) and the transmission shaft (12) are on the same straight line, the shape of the bottom plate (1) is circular, the inner wall of the driven threaded component (3) is provided with threads, and the screw rod (4) is located inside the driven threaded component (3) and is matched with the screw rod.
3. The steel cap installation centering deflection detecting device based on capacitance change principle according to claim 1, characterized in that: it is three the shape specification of stopper (5) is all the same, stopper (5) are the centre of a circle of arc structure and centre of a circle and bottom plate (1) for the same point, three promptly stopper (5) are the same to the distance of bottom plate (1) axis, and adjacent two interval between stopper (5) is the same, three promptly stopper (5) use the axis of bottom plate (1) to be evenly distributed as referring to.
4. The steel cap installation centering deflection detecting device based on capacitance change principle according to claim 1, characterized in that: the three card post (6) shape specification all is the same, the one end that the motion (2) was kept away from in card post (6) is the curved surface structure and the curved surface degree is the same with the curved surface degree of positioning seat (7), and is three card post (6) respectively with three positioning seat (7) corresponding, the distance between two adjacent card posts (6) is the same with adjacent two distance between positioning seat (7), three the distance of the extreme point of card post (6) to motion (2) center is the same, three promptly card post (6) use the mid point of motion (2) to be for referring to and are evenly distributed.
5. The steel cap installation centering deflection detecting device based on capacitance change principle according to claim 1, characterized in that: the shape and specification of the three positioning seats (7) are the same, one end, far away from the center of the bottom plate (1), of each positioning seat (7) is of a curved surface structure, the curved surface degree is the same as that of the top end of the clamping column (6), the distance between every two adjacent positioning seats (7) is the same, namely the three positioning seats (7) are uniformly distributed by taking the central axis of the bottom plate (1) as a reference, and the distances from the end points of the three positioning seats (7) to the midpoint of the bottom plate (1) are the same.
6. The steel cap installation centering deflection detecting device based on capacitance change principle according to claim 1, characterized in that: the movable polar plate (13) and the fixed polar plate (14) are both located inside the shaft sleeve (11), the movable polar plate (13) is movably connected with the transmission shaft (12), the fixed polar plate (14) is fixedly connected with the inner wall of the shaft sleeve (11), the movable polar plate (13) and the fixed polar plate (14) are of two concentric semicircular ring structures, the diameter of the movable polar plate (13) is twice of that of the fixed polar plate (14), the movable polar plate (13) is inserted in the middle of the fixed polar plate (14), and the movable polar plate (13) and the fixed polar plate are tightly attached.
7. The steel cap installation centering deflection detecting device based on capacitance change principle according to claim 1, characterized in that: the three positioning claws (22) are uniformly distributed by taking the middle point of the movable plate (21) as a reference, namely the distances between two adjacent positioning claws (22) are the same, the distances from the three positioning claws (22) to the middle point of the movable plate (21) are the same, and the three clamping columns (6) respectively correspond to the three positioning claws (22).
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| CN110979899A (en) * | 2019-11-25 | 2020-04-10 | 魏治华 | Telescopic petroleum barrel capable of triggering leakage early warning based on capacitance change principle |
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| CN106404412B (en) * | 2016-09-28 | 2019-04-30 | 中国航空工业集团公司北京航空精密机械研究所 | It is a kind of for measuring the device of Aero-engine Bearing seat center displacement |
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