A device for testing the corrosion resistance of a storage tank
By designing a corrosion resistance testing device for storage tanks, and utilizing the automated detection of mounting brackets and ultrasonic probes, the problem of conventional flaw detectors being unable to detect flaws in the upper part of the tank has been solved, improving testing efficiency and accuracy, and simplifying the operation process.
Patent Information
- Application Number
- CN202510244676.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-04
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2045-03-04
AI Technical Summary
When conducting corrosion resistance tests on existing storage tanks, conventional flaw detectors struggle to effectively inspect the upper half of the tank, resulting in low testing efficiency.
A corrosion resistance testing device for storage tanks was designed. By using a mounting bracket and an ultrasonic probe together, automatic flaw detection of the tank body can be achieved. The combination of power components and mounting components enables stable installation and movement of the ultrasonic probe. The design of elastic frame and ball bearings ensures that the probe fits snugly against the tank wall and reduces friction.
It improves the efficiency of corrosion resistance testing of storage tanks, enhances the stability and accuracy of testing, reduces the need for manual operation, and simplifies the movement and storage of the equipment.
Smart Images

Figure CN120064089B_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of storage tank testing, in particular to a storage tank corrosion resistance testing device. BACKGROUND
[0002] The storage tank is an industrial tool for storing liquid or gas, which is usually made of metal or plastic and has different designs and functions to meet various industrial applications and household needs. The interface of the storage tank adopts an international standard quick chuck type, selects imported 316L or 304 stainless steel, and the inner surface is mirror polished. It is equipped with various interfaces such as liquid level meter interface, respirator interface, thermometer interface, CIP cleaning port, sight glass, explosion-proof sight lamp, SIP sterilization port, liquid inlet and outlet port, and manhole.
[0003] At present, when the corrosion resistance of the storage tank is tested, the storage tank is filled with corrosion solution, and after a period of time, the solution is emptied, and the tank body is detected by using an ultrasonic flaw detector. Since the storage tank is large, the conventional flaw detector is small, and it is difficult to detect the upper half of the tank body by hand, resulting in low test efficiency. SUMMARY
[0004] Technical problems to be solved
[0005] In view of the defects in the prior art, the present application provides a storage tank corrosion resistance testing device, which mainly solves the problem of low test efficiency caused by the large size of the storage tank and the small size of the conventional flaw detector.
[0006] Technical scheme
[0007] To achieve the above-mentioned purpose, the present application provides the following technical scheme:
[0008] The utility model provides an anti -corrosion test device of storage tank, including the car body, the top of car body is located the position of center and is connected with the rotating plate through the mounting seat horizontal rotation, and rotating plate is fixed through screw locking, the top of rotating plate is located the position of edge and is connected with the rotating frame through the mounting seat inclined rotation, the top of rotating plate is integrative in rotating frame and is formed with two protrusions, two protrusions are equipped with the power component that drives rotating frame and rotates between, the top of rotating frame is equipped with two insertion hole, the top of rotating frame is equipped with the connecting frame, the bottom of rotating frame is fixedly connected with two and is inserted with the plug of insertion hole, the outside of plug is fixedly connected with the rubber ring, both ends of rotating frame are equipped with the mounting assembly, make rotating frame and connecting frame get assembled, one side of connecting frame is fixedly connected with multistage electric push rod, one end of multistage electric push rod telescopic part is fixedly connected with the mounting frame through connecting frame, one side of mounting frame is equipped with the rotating groove, the rotating block is rotatably connected in rotating groove, and the rotating block is fixed through screw locking, one side of rotating block is equipped with the sliding mouth, the sliding rod is slidably connected in sliding mouth, one end of sliding rod is fixedly connected with the elastic frame, one end of elastic frame is fixedly connected with the ultrasonic probe, the outside of sliding rod is sleeved with the spring, and the both ends of spring are fixed with rotating block and sliding rod respectively.
[0009] Further, the power component includes a lead screw rotatably connected between the two protrusions, one of the protrusions has a self-locking motor fixedly connected to one side thereof, and an output shaft of the self-locking motor is fixedly connected to the lead screw at one end thereof, the lead screw has a push plate threadedly connected to the outside thereof for moving along the horizontal plane of the rotating plate, the push plate has two force arms rotatably connected to the two ends thereof, and the two force arms are rotatably connected to the two sides of the rotating frame, respectively, and are in an inclined state.
[0010] Based on the foregoing scheme, the mounting assembly includes two insertion slots, the two insertion slots are formed in the two ends of the rotating frame, respectively, the two ends of the connecting frame are integrally formed with two insertion plugs matched with the insertion slots, and the insertion plugs are provided with a clamping assembly for auxiliary fixing of the connecting frame and the rotating frame.
[0011] As a further scheme of the utility model, the clamping assembly includes a sliding block, the insertion plug is provided with a sliding hole in the bottom thereof, the sliding block is slidably connected in the sliding hole, the insertion plug is provided with a avoiding slot in communication with the sliding hole, and the sliding block extends into the avoiding slot, the two sides of the avoiding slot are fixedly connected with two elastic cloths, and the elastic cloths are fixed with the sliding block, one side of the sliding block is provided with an arc-shaped recess, the bottom of the insertion slot is provided with a positioning hole, one side of the positioning hole is provided with a placing slot, and the placing slot is fixedly connected with an elastic ball.
[0012] Further, two sliding grooves are formed in the top of the rotating frame and the connecting frame, and the mounting frame is in sliding connection with the sliding grooves, the two sliding grooves on the rotating frame are in communication with the two insertion grooves respectively, and the two sliding grooves on the connecting frame are in penetration with the two insertion plugs respectively, and the avoiding grooves are below the sliding grooves and in communication with the sliding grooves.
[0013] On the basis of the foregoing solution, the elastic frame is fixedly connected with a limiting block, so that the deformation distance of the elastic frame is limited.
[0014] As a further solution of the present application, the outer side of the elastic frame is fixedly connected with a plurality of cylinders, one end of each of the plurality of cylinders is provided with a mounting groove, and a ball is in rolling connection in the mounting groove.
[0015] Advantages
[0016] Compared with the prior art, the present application provides a storage tank corrosion resistance testing device, which has the following advantages:
[0017] 1. By cooperating the mounting frame with the ultrasonic probe, the rotating frame and the connecting frame are assembled, then the rotating frame is rotated by 90 degrees, and then the ultrasonic probe is brought into contact with the outer wall of the tank, and then the ultrasonic probe is moved by the mounting frame to detect the tank, so that the staff does not need to hold the ultrasonic probe for detection, thereby facilitating the detection of the tank body and improving the testing efficiency.
[0018] 2. By setting the mounting assembly, the connecting frame and the rotating frame are set in a split structure, and when not in use, the connecting frame is placed on the mounting frame, so that the volume of the testing device can be reduced, and the testing device can be moved conveniently.
[0019] 3. By setting the clamping assembly, the connecting frame and the rotating frame are assembled, and under the action of the clamping assembly, the connecting frame and the rotating frame can be stably installed, so as to ensure the stability of the assembly of the connecting frame and the rotating frame, and improve the stability of the use of the testing device.
[0020] 4. By setting the elastic frame, when the ultrasonic probe is in contact with the outer wall of the tank, the angle of the ultrasonic probe can be changed under the action of the elastic frame, so as to make the ultrasonic probe fit the outer wall of the tank, and improve the accuracy of the detection of the ultrasonic probe.
[0021] 5. By setting the ball, when the ultrasonic probe is in contact with the outer wall of the tank, the ball will also be in contact with the tank, and when the ultrasonic probe moves, the ball will roll, so as to reduce the friction when the ultrasonic probe moves, and improve the use effect of the testing device. BRIEF DESCRIPTION OF DRAWINGS
[0022] Figure 1A three-dimensional structural schematic diagram of a storage tank corrosion resistance testing device is provided in the present application;
[0023] Figure 2 A partial enlarged structural schematic diagram of a storage tank corrosion resistance testing device is provided in the present application;
[0024] Figure 3 An enlarged structural schematic diagram of a connecting frame of a storage tank corrosion resistance testing device is provided in the present application;
[0025] Figure 4 An enlarged structural schematic diagram of an ultrasonic probe of a storage tank corrosion resistance testing device is provided in the present application;
[0026] Figure 5 A plug cross-sectional structural schematic diagram of a storage tank corrosion resistance testing device is provided in the present application;
[0027] Figure 6 An enlarged structural schematic diagram of an elastic ball of a storage tank corrosion resistance testing device is provided in the present application.
[0028] In the figure: 1, vehicle body; 2, rotating plate; 3, rotating frame; 4, connecting frame; 5, push plate; 6, insertion hole; 7, insertion slot; 8, sliding slot; 9, force arm; 10, screw rod; 11, self-locking motor; 12, plug; 13, insertion block; 14, spring; 15, sliding rod; 16, rotating groove; 17, mounting frame; 18, multi-stage electric push rod; 19, rotating block; 20, rubber ring; 21, elastic frame; 22, mounting groove; 23, ultrasonic probe; 24, ball bearing; 25, limit block; 26, avoidance slot; 27, sliding block; 28, elastic cloth; 29, arc-shaped groove; 30, sliding hole; 31, elastic ball; 32, placement slot; 33, positioning hole. DETAILED DESCRIPTION
[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0030] REFERENCE Figures 1-6The utility model provides a kind of storage tank corrosion resistance testing device, including vehicle body 1, the top of vehicle body 1 is located at the position of center and is horizontally rotatably connected with rotating plate 2 by mounting seat, and rotating plate 2 is fixed by screw locking, the top of rotating plate 2 is located at the position of edge and is obliquely rotatably connected with rotating frame 3 by mounting seat, the top of rotating plate 2 is integrally formed with two protrusions in rotating frame 3, power component for driving rotating frame 3 is arranged between the two protrusions, two insertion holes 6 are formed in the top of rotating frame 3, connecting frame 4 is arranged on the top of rotating frame 3, two plug blocks 13 are welded on the bottom of rotating frame 3 and are inserted into insertion hole 6, rubber ring 20 is attached to the outside of plug block 13, mounting assembly is arranged on both ends of rotating frame 3, so that rotating frame 3 and connecting frame 4 are assembled, multistage electric push rod 18 is fixed on one side of connecting frame 4 by bolt, mounting frame 17 is fixed on one end of telescopic part of multistage electric push rod 18 by bolt, rotating groove 16 is formed on one side of mounting frame 17, rotating block 19 is rotatably connected in rotating groove 16, and rotating block 19 is fixed by screw locking, sliding hole is formed on one side of rotating block 19, sliding rod 15 is slidably connected in sliding hole, elastic frame 21 is welded on one end of sliding rod 15, ultrasonic probe 23 is fixed on one end of elastic frame 21 by bolt, the model of ultrasonic probe 23 is 1-5P13X13K1K2K2.5K3, spring 14 is sleeved on the outside of sliding rod 15, and both ends of spring 14 are fixed with rotating block 19 and sliding rod 15 respectively, connecting frame 4 is taken out from rotating frame 3 and plug block 13 is separated from insertion hole 6, then connecting frame 4 and rotating frame 3 are assembled by mounting assembly, then rotating frame 3 is rotated by 90 degrees by power component, then rotating block 19 is rotated upward, rotating block 19 drives sliding rod 15 to rotate, sliding rod 15 drives ultrasonic probe 23 to rotate through elastic frame 21, when sliding rod 15 is rotated to 90 degrees with mounting frame 17, rotating block 19 is fixed by screw, then ultrasonic probe 23 is contacted with tank body by moving vehicle body 1, because the stress of spring 14 is greater than the stress of elastic frame 21, elastic frame 21 is extruded and deformed, so that ultrasonic probe 23 is attached to tank body, then mounting frame 17 is moved by multistage electric push rod 18, so that ultrasonic probe 23 moves along the surface of tank body, because tank body is arc-shaped, when ultrasonic probe 23 moves along the surface of tank body, sliding rod 15 moves and extrudes spring 14, so that ultrasonic probe 23 detects tank body, staff need not to hold for detection, so that tank body is detected conveniently, and testing efficiency is improved.
[0031] The power assembly comprises a screw rod 10, the screw rod 10 is rotationally connected between two protrusions, one side of one of the protrusions is fixed with a self-locking motor 11 through bolts, and one end of an output shaft of the self-locking motor 11 penetrates the protrusion and is fixed with the screw rod 10, the outer side of the screw rod 10 is threadedly connected with a push plate 5 which moves along the horizontal plane of the rotating plate 2, both ends of the push plate 5 are rotationally connected with force arms 9, the two force arms 9 are rotationally connected with the two sides of the rotating frame 3 respectively, and the two force arms 9 are in inclined states, the self-locking motor 11 is started, the self-locking motor 11 drives the screw rod 10 to rotate, the screw rod 10 drives the push plate 5 to move along the horizontal plane of the rotating plate 2 through the thread engagement between the screw rod 10 and the push plate 5, the push plate 5 drives the rotating frame 3 to rotate upwards through the force arms 9 in the moving process, the rotating frame 3 drives the connecting frame 4 to rotate, and the force arms 9 rotate relative to the push plate 5 and the rotating frame 3, when the rotating frame 3 rotates by 90 degrees, the self-locking motor 11 is turned off, the position of the push plate 5 is fixed through the thread engagement between the screw rod 10 and the push plate 5, so that the rotating frame 3 is fixed;
[0032] In particular, the mounting assembly comprises two slots 7 respectively formed at two ends of the rotating frame 3, the two ends of the connecting frame 4 are integrally formed with plug 12 matched with the slot 7, and the plug 12 is inserted into the slot 7, the bottom of the plug 12 is provided with a clamping assembly for assisting the fixation of the connecting frame 4 and the rotating frame 3, the clamping assembly comprises a sliding block 27, the bottom of the plug 12 is provided with a sliding hole 30, the sliding block 27 is slidingly connected in the sliding hole 30, the plug 12 is provided with a clearance groove 26 communicated with the sliding hole 30, and the sliding block 27 extends into the clearance groove 26, the two sides of the clearance groove 26 are bonded with two elastic cloths 28, and the elastic cloth 28 is fixed with the sliding block 27, one side of the sliding block 27 is provided with an arc-shaped groove 29, the bottom of the slot 7 is provided with a positioning hole 33, and the sliding block 27 is inserted into the positioning hole 33, one side of the positioning hole 33 is provided with a placing groove 32, and the placing groove 32 is bonded with an elastic ball 31, and the elastic ball 31 is clamped with the arc-shaped groove 29, the top of the rotating frame 3 and the connecting frame 4 is provided with two sliding grooves 8, and the mounting frame 17 is slidingly connected with the sliding groove 8, the two sliding grooves 8 on the rotating frame 3 are communicated with the two slots 7 respectively, the two sliding grooves 8 on the connecting frame 4 are respectively penetrated through the two plugs 12, and the clearance groove 26 is below the sliding groove 8 and communicated with the sliding groove 8, the sliding block 27 is pushed to move upward along the sliding hole 30, the sliding block 27 will stretch the elastic cloth 28 and make the elastic cloth 28 generate elastic force, then the plug 12 on the connecting frame 4 is inserted into the slot 7 on the rotating frame 3, because the shape of the slot 7 is convex, the plug 12 can avoid the connecting frame 4 from tilting when being inserted into the slot 7, when the plug 12 on the connecting frame 4 is completely inserted into the slot 7, the sliding block 27 will be aligned with the positioning hole 33, at this time, the elastic cloth 28 will pull the sliding block 27 to move downward to reset under the action of its own elastic force, so that the sliding block 27 is inserted into the positioning hole 33, at this time, the sliding block 27 will extrude the elastic ball 31 to make the elastic ball 31 deform, when the sliding block 27 is completely reset, the elastic ball 31 will be aligned with the arc-shaped groove 29, the elastic ball 31 will be restored by its own elastic force and clamped into the arc-shaped groove 29, thereby assisting the fixation of the connecting frame 4 and the rotating frame 3, the elastic frame 21 is fixed with a limiting block 25 through a bolt, so that the deformation distance of the elastic frame 21 is limited, the limiting block 25 can avoid the elastic frame 21 from being damaged due to excessive deformation, a plurality of cylinders are welded on the outside of the elastic frame 21, one end of each of the plurality of cylinders is provided with a mounting slot 22, a rolling ball 24 is rolling connected in the mounting slot 22, when the ultrasonic probe 23 contacts with the outer wall of the pot, the rolling ball 24 also contacts with the pot, when the ultrasonic probe 23 moves, the rolling ball 24 will roll, thereby reducing the friction when the ultrasonic probe 23 moves, and improving the use effect of the testing device.
[0033] The working principle of the embodiment is as follows: when in use, the connecting frame 4 is taken out from the rotating frame 3 and the plug 13 is separated from the socket 6, then the sliding block 27 is pushed to move upward along the sliding hole 30, the elastic cloth 28 is stretched and generates elastic force, then the plug 12 on the connecting frame 4 is inserted into the slot 7 on the rotating frame 3, since the slot 7 is in the shape of a convex letter, the plug 12 can be inserted into the slot 7 without tilting the connecting frame 4, when the plug 12 on the connecting frame 4 is completely inserted into the slot 7, the sliding block 27 is aligned with the positioning hole 33, at this time, the elastic cloth 28 pulls the sliding block 27 to move downward to reset under the action of its own elastic force, the sliding block 27 is inserted into the positioning hole 33, at this time, the sliding block 27 extrudes the elastic ball 31 to deform, when the sliding block 27 is completely reset, the elastic ball 31 is aligned with the arc-shaped groove 29, the elastic ball 31 is reset to be clamped into the arc-shaped groove 29 under the action of its own elastic force, thereby assisting in fixing the connecting frame 4 and the rotating frame 3, then the self-locking motor 11 is started, the self-locking motor 11 drives the lead screw 10 to rotate, the lead screw 10 drives the push plate 5 to move along the horizontal plane of the rotating plate 2 through the thread engagement between them, the push plate 5 drives the rotating frame 3 to rotate upward through the force arm 9 in the moving process, the rotating frame 3 drives the connecting frame 4 to rotate, at the same time, the force arm 9 rotates between the push plate 5 and the rotating frame 3, when the rotating frame 3 rotates by 90 degrees, the self-locking motor 11 is turned off, at this time, the position of the push plate 5 is fixed through the thread engagement between the lead screw 10 and the push plate 5, thereby fixing the rotating frame 3, then the rotating block 19 is rotated upward, the rotating block 19 drives the sliding rod 15 to rotate, the sliding rod 15 drives the ultrasonic probe 23 to rotate through the elastic frame 21, when the sliding rod 15 rotates to be 90 degrees with the mounting frame 17, the rotating block 19 is fixed through a screw, then the ultrasonic probe 23 is contacted with the tank body by moving the vehicle body 1, since the stress of the spring 14 is greater than that of the elastic frame 21, the elastic frame 21 is extruded to deform, thereby making the ultrasonic probe 23 adhere to the tank body, then the mounting frame 17 is moved by the multi-stage electric push rod 18, thereby making the ultrasonic probe 23 move along the surface of the tank body, since the tank body is arc-shaped, the ultrasonic probe 23 moves along the surface of the tank body to make the sliding rod 15 move and extrude the spring 14, thereby making the ultrasonic probe 23 detect the tank body, without the staff holding to detect, thereby facilitating the detection of the tank body and improving the test efficiency.
[0034] The electrical components in the text are all connected with the main controller and 220V mains electricity, and the main controller can be a conventional known device such as a computer.
[0035] In the description of the text, it is necessary to explain that the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.
[0036] Although embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A corrosion resistance testing device for storage tanks, comprising a vehicle body (1), characterized in that, The top of the vehicle body (1) is horizontally connected to a rotating plate (2) via a mounting base at its center, and the rotating plate (2) is fixed by screws. The top of the rotating plate (2) is tilted and connected to a rotating frame (3) via a mounting base at its edge. The top of the rotating plate (2) is integrally formed with two protrusions inside the rotating frame (3). A power component for driving the rotating frame (3) to rotate is provided between the two protrusions. The top of the rotating frame (3) has two insertion holes (6). The top of the rotating frame (3) is provided with a connecting frame (4). The bottom of the rotating frame (3) is fixedly connected with two plugs (13) that are inserted into the insertion holes (6). A rubber ring (20) is fixedly connected to the outside of the plugs (13). Both ends of the rotating frame (3) are provided with mounting components to assemble the rotating frame (3) and the connecting frame (4). A multi-stage electric push rod (18) is fixedly connected to one side of the connecting frame (4). One end of the telescopic part of the multi-stage electric push rod (18) passes through the connecting frame (4) and is fixedly connected to a... Mounting bracket (17), one side of which has a rotating groove (16), a rotating block (19) is rotatably connected in the rotating groove (16), and the rotating block (19) is locked and fixed by screws. One side of the rotating block (19) has a sliding opening, and a sliding rod (15) is slidably connected in the sliding opening. One end of the sliding rod (15) is fixedly connected to an elastic frame (21), and one end of the elastic frame (21) is fixedly connected to an ultrasonic probe (23). A spring (14) is sleeved on the outside of the sliding rod (15), and the spring... (14) is fixed to the rotating block (19) and the sliding rod (15) at both ends respectively. The top of the rotating frame (3) and the connecting frame (4) are provided with two sliding grooves (8), and the mounting frame (17) is slidably connected to the sliding grooves (8). The two sliding grooves (8) on the rotating frame (3) are connected to the two slots (7) respectively. The two sliding grooves (8) on the connecting frame (4) pass through the two plugs (12) respectively, and the clearance groove (26) is located below the sliding groove (8) and is connected to the sliding groove (8).
2. The corrosion resistance testing device for storage tanks according to claim 1, characterized in that, The power assembly includes a lead screw (10), which is rotatably connected between two protrusions. A self-locking motor (11) is fixedly connected to one side of one of the protrusions, and one end of the output shaft of the self-locking motor (11) passes through the protrusion and is fixed to the lead screw (10). A push plate (5) that moves along the horizontal plane of the rotating plate (2) is threaded to the outside of the lead screw (10). Both ends of the push plate (5) are rotatably connected to force arms (9). The two force arms (9) are rotatably connected to the two sides of the rotating frame (3), and both force arms (9) are in an inclined state.
3. The corrosion resistance testing device for storage tanks according to claim 1, characterized in that, The mounting assembly includes two slots (7), which are respectively opened at both ends of the rotating frame (3). Both ends of the connecting frame (4) are integrally formed with plugs (12) that are compatible with the slots (7). The bottom of the plugs (12) is provided with a locking assembly for auxiliary fixing of the connecting frame (4) and the rotating frame (3).
4. The corrosion resistance testing device for storage tanks according to claim 3, characterized in that, The engaging assembly includes a slider (27), and the bottom of the plug (12) is provided with a sliding hole (30). The slider (27) is slidably connected in the sliding hole (30). The plug (12) is provided with a relief groove (26) that communicates with the sliding hole (30), and the slider (27) extends into the relief groove (26). Two elastic cloths (28) are fixedly connected to both sides of the relief groove (26), and the elastic cloths (28) are fixed to the slider (27). An arc-shaped groove (29) is provided on one side of the slider (27). The bottom of the slot (7) is provided with a positioning hole (33), and a placement groove (32) is provided on one side of the positioning hole (33). An elastic ball (31) is fixedly connected in the placement groove (32).
5. The corrosion resistance testing device for storage tanks according to claim 1, characterized in that, The elastic frame (21) is fixedly connected to a limiting block (25) so that the deformation distance of the elastic frame (21) is limited.
6. The corrosion resistance testing device for storage tanks according to claim 5, characterized in that, Multiple cylinders are fixedly connected to the outer side of the elastic frame (21), and each of the multiple cylinders has an installation groove (22) at one end, with a ball bearing (24) rollingly connected in the installation groove (22).
Citation Information
Patent Citations
Glass fiber reinforced plastic fireproof grating cutting device with clamping function
CN117601182A
Engineering detection equipment calibration test block
CN209589944U