Can bottom arch deformation measuring device

Abstract

The present invention discloses a device for measuring the deformation of the bottom arch of a can, comprising a frame, a lifting cylinder installed on the frame, a measuring assembly, and a first bearing member fixed on the piston rod of the lifting cylinder. The measuring assembly comprises a second bearing member and a deformation measuring member fixed to the second bearing member, and the second bearing member is movably sleeved on the piston rod of the lifting cylinder and can be supported by the first bearing member and follow the first bearing member to make an upward movement. The deformation measuring member is used to detect the deformation of the bottom arch of a sample can. During measurement, after the sample can is clamped, the lifting cylinder drives the first bearing member to descend, so that the second bearing member descends due to gravity and the deformation measuring member contacts the sample can. After the measurement is completed, the lifting cylinder drives the first bearing member to rise, so that the deformation measuring member is supported by the first bearing member to rise and move away from the sample can. It is convenient to measure the deformation of the bottom arch of cans with different can heights, and the measurement efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of measuring devices, in particular to a device for measuring deformation of a bottom arch of a can. Background Art

[0002] Cans or other can bodies generally need to be tested for can lids, can bottoms, and pull rings to detect whether the cans meet the standards. In order to comprehensively test the safety of cans, it is necessary to measure the deformation of the bottom arch of the can bottom (the bottom arch of the can bottom is the outward arched connection between the can bottom and the can body. When cans are stacked in boxes, they rely on the bottom arch of the can bottom for support) (i.e., inject high-pressure gas into the can body and measure the deformation of the bottom arch). However, in the actual measurement process, the can height (can height is the height of the can) of cans of different specifications is inconsistent, and the measuring device needs to be adjusted repeatedly, resulting in low measurement efficiency. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, an object of the present invention is to provide a device for measuring the deformation of the bottom arch of cans, which is convenient for measuring the deformation of the bottom arch of cans with different can heights and has high measurement efficiency.

[0004] The purpose of the present invention is achieved by the following technical solutions:

[0005] A can bottom arch deformation measuring device comprises a frame, a lifting cylinder mounted on the frame, a measuring assembly, and a first bearing member fixed on a piston rod of the lifting cylinder;

[0006] The measuring assembly comprises a second bearing member and a deformation measuring member fixed to the second bearing member, wherein the second bearing member is movably sleeved with the piston rod of the lifting cylinder and can be supported by the first bearing member and follow the first bearing member to perform an ascending movement; the deformation measuring member is used to detect the deformation amount of the bottom arch of the sample tank;

[0007] During measurement, after the sample can is clamped, the lifting cylinder drives the first bearing member to descend, so that the second bearing member descends due to gravity and the deformation measuring member contacts the sample can;

[0008] After the measurement is completed, the lifting cylinder drives the first bearing member to rise, so that the first bearing member supports the deformation measuring member to rise and move away from the sample tank.

[0009] Furthermore, the can bottom arch deformation measuring device also includes: a pulley installed on the frame, a rope wrapped around the pulley and supported by the pulley, a guide column vertically fixed to the frame, and a counterweight block slidably connected to the guide column; one end of the rope is fixed to the counterweight block, and the other end is fixed to the first load-bearing member or the second load-bearing member.

[0010] Furthermore, the pulley is a fixed pulley, and at least two pulleys are provided, the two pulleys are arranged at the same height, and the rope is wound around the two pulleys and supported by the two pulleys.

[0011] Furthermore, the rope is a steel wire rope.

[0012] Further, the measuring assembly further comprises a telescopic cylinder hinged on the second bearing member and placed horizontally, a swing arm drivingly connected to the piston rod of the telescopic cylinder and driven by the piston rod of the telescopic cylinder to swing horizontally, a swing shaft fixed to the other end of the swing arm and placed vertically, and a horizontal beam fixedly connected to the swing shaft; the swing shaft is pivotally connected to the second bearing member; the telescopic cylinder is used to drive the horizontal beam to perform horizontal rotational motion and switch to different detection positions on the frame;

[0013] The deformation measuring member comprises a micrometer, which is vertically placed and fixed to the crossbeam, and is used to detect the deformation of the bottom arch of the sample tank.

[0014] Furthermore, a support column is provided on the frame, and the support column is located below the crossbeam, and the support column is used to support and limit the crossbeam.

[0015] Furthermore, the support columns are provided in plurality, and the plurality of support columns are respectively arranged at different detection positions on the frame.

[0016] Furthermore, the support column is threadedly connected to the frame.

[0017] Furthermore, the measuring assembly further comprises a telescopic cylinder hinged on the second bearing member and placed horizontally, a swing rod drivingly connected to the piston rod of the telescopic cylinder and driven by the piston rod of the telescopic cylinder to swing horizontally, and a swing shaft fixed to the other end of the swing rod and placed vertically; the swing shaft is pivotally connected to the second bearing member;

[0018] The deformation measuring member comprises a grating ruler and a measuring rod, the guide rail of the grating ruler is placed vertically, the slider of the grating ruler is slidably connected to the guide rail of the grating ruler and is fixed to the second bearing member, and the measuring rod is placed horizontally and fixed to the swing shaft;

[0019] The telescopic cylinder is used to drive the measuring rod to perform horizontal rotational movement and switch to different detection positions on the frame.

[0020] Furthermore, the piston rod of the telescopic cylinder is fixedly connected to an output rod, and the other end of the output rod is hinged to the swing rod and is used to drive the swing rod to swing horizontally.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] In the can bottom arch deformation measuring device of the present invention, a first bearing member is fixed on the piston rod of the lifting cylinder, and a second bearing member is movably sleeved on the piston rod of the lifting cylinder. In this way, the second bearing member can be lowered by gravity and raised by the first bearing member. It can be understood that in this way, the bottom arches of sample cans with different can heights can be measured; and when switching to measure sample cans with different can heights at any time, since the second bearing member is movably sleeved on the piston rod of the lifting cylinder, the second bearing member can be lowered until the deformation measuring member contacts the bottom arch of the sample can, thereby not only ensuring that the deformation measuring member reliably contacts the bottom arch of the sample can to make the measurement result accurate, but also simplifying the measurement process, greatly improving the measurement efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a second embodiment of the can bottom arch deformation measuring device of the present invention;

[0024] Figure 2 for Figure 1 A schematic diagram of the structure from another perspective is shown;

[0025] Figure 3 for Figure 1 The schematic diagram of the structure of the can bottom arch deformation measuring device (the first embodiment and the second embodiment) of the present invention is shown; wherein the measuring rod of the second embodiment is not shown, but the micrometer of the first embodiment is shown);

[0026] Figure 4 for Figure 3 A partial cross-sectional view of a device for measuring deformation of a can bottom arch is shown.

[0027] In the figure: 1, frame; 2, lifting cylinder; 3, first bearing member; 41, second bearing member; 42, telescopic cylinder; 43, rocker arm; 44, rocker shaft; 45, crossbeam; 46, micrometer; 47, supporting column; 48, grating ruler; 481, guide rail of grating ruler; 482, slider of grating ruler; 49, measuring rod; 51, pulley; 52, rope; 53, guide column; 54, counterweight. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0029] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "horizontal", "vertical", "top", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be fixedly connected, detachably connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internally connected between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] Embodiment 1:

[0032] Figure 3 and Figure 4 The first embodiment of the present invention is a can bottom arch deformation measuring device (in order to facilitate the understanding of the first embodiment, it is necessary to refer to Figure 1 and Figure 2 ), including a frame 1, a lifting cylinder 2 installed on the frame 1, a measuring component, and a first bearing member 3 fixed on the piston rod of the lifting cylinder 2.

[0033] The measuring assembly includes a second bearing member 41, a deformation measuring member fixed to the second bearing member 41 (it should be mentioned first that, for ease of understanding, in the first embodiment, the deformation measuring member includes a micrometer 46. Alternatively, in the second embodiment, the deformation measuring member is replaced by a grating ruler 48 and a measuring rod 49 instead of the micrometer 46). The second bearing member 41 is movably sleeved with the piston rod of the lifting cylinder 2, and can be supported by the first bearing member 3 and follow the first bearing member 3 to move upward. The deformation measuring member is used to detect the deformation of the bottom arch of the sample tank.

[0034] During measurement, after the sample can is clamped (there are various clamping methods, which are not directly related to the purpose and technical solution of the present invention, and will not be described in detail in this embodiment), the lifting cylinder 2 drives the first bearing member 3 to descend, so that the second bearing member 41 descends due to gravity, and the deformation measuring member contacts the sample can. At this time, the inner cavity of the sample can is sealed and pressurized by air in the prior art (refer to the patent application document with patent application number CN200720099158.4), so that the bottom arch of the sample can is compressed and deformed, so that the deformation measuring member detects the slight deformation of the bottom arch.

[0035] After the measurement is completed, the lifting cylinder 2 drives the first bearing member 3 to rise, so that the deformation measuring member supported by the first bearing member 3 rises and moves away from the sample can; so as to facilitate the removal of the sample can from the inspection station of the rack 1 and to facilitate the placement of another sample can on the inspection station of the rack 1.

[0036] The first bearing member 3 can be a disc or block structure, or other regular or irregular structured objects, as long as it is fixed on the piston rod (such as the output end of the piston rod) and can support the second bearing member 41, and can normally switch between separation and contact with the second bearing member 41. For example, when the deformation measuring member contacts the bottom arch of the can, the deformation measuring member is supported by the can, and the first bearing member 3 can continue to move downward under the drive of the output shaft of the piston rod, thereby separating from the second bearing member 41; and when the first bearing member 3 rises under the drive of the output shaft of the piston rod, it can re-contact the second bearing member 41 to support its rise.

[0037] Obviously, in the can bottom arch deformation measuring device of the present invention, the first bearing member 3 is fixed on the piston rod of the lifting cylinder 2, and the second bearing member 41 is movably sleeved with the piston rod of the lifting cylinder 2. In this way, the second bearing member 41 can be lowered by gravity and raised by the first bearing member 3. It can be understood that in this way, the bottom arches of sample cans with different can heights can be measured; and when switching to measure sample cans with different can heights at any time, since the second bearing member 41 is movably sleeved with the piston rod of the lifting cylinder 2, the second bearing member 41 can be lowered until the deformation measuring member contacts the bottom arch of the sample can, thereby not only ensuring that the deformation measuring member reliably contacts the bottom arch of the sample can to make the measurement result accurate, but also simplifying the measurement process, greatly improving the measurement efficiency.

[0038] See also Figure 2, since the cylinder driving process is fast, in order to avoid strong rigid impact, the deformation measuring piece is in soft contact with the sample can. Preferably, the can bottom arch deformation measuring device also includes: a pulley 51 installed on the frame 1, a rope 52 wrapped around the pulley 51 and supported by the pulley 51, a guide column 53 vertically fixed to the frame 1, and a counterweight 54 slidably connected to the guide column 53. One end of the rope 52 is fixed to the counterweight 54, and the other end is fixed to the first bearing member 3 or the second bearing member 41. It can be understood that in the first setting mode, one end of the rope 52 is fixed to the counterweight 54, and the other end is fixed to the first bearing member 3. With the pulley 51 as the support point, when the piston rod of the lifting cylinder 2 drives the first bearing member 3 to descend, the rope 52 pulls the counterweight 54 to make a vertical upward movement, thereby slowing down the running speed of the piston rod of the lifting cylinder 2, that is, reducing the descending speed of the first bearing member 3, and achieving the purpose of soft contact. Moreover, when the lifting cylinder 2 drives the first bearing member 3 to rise, the faster speed can improve the working efficiency of the equipment, that is, indirectly improve the measurement efficiency. Setting method two, one end of the rope 52 is fixed to the counterweight block 54, and the other end is fixed to the second bearing member 41. The lifting cylinder 2 is still driven very quickly. When the piston rod of the lifting cylinder 2 drives the first bearing member 3 to descend, since the total weight of the second bearing member 41 and the object fixed to the second bearing member 41 is slightly greater than the weight of the counterweight block 54, the rope 52 pulls the counterweight block 54 to perform a vertical upward movement, so that the first bearing member 3 is separated from the contact with the second bearing member 41 from the beginning of the descent, and the second bearing member 41 descends more slowly, which also achieves the purpose of soft contact.

[0039] Among them, as a support point, the pulley 51 can also be replaced by a cylinder, and in order to reduce friction, the pulley 51 is used in this embodiment. In addition, the pulley 51 can be a fixed pulley 51, a movable pulley 51, or a combination of a fixed pulley 51 and a movable pulley 51, and its setting method can be set according to normal mechanics, such as two fixed pulleys 51 are located between the movable pulleys 51, and the movable pulley 51 is controlled by a guide rail. In this embodiment, further, the pulley 51 is preferably a fixed pulley 51, and the fixed pulley 51 can be a larger fixed pulley 51 to ensure that the two ends of the rope 52 have enough horizontal distance to connect the counterweight block 54 and the first bearing member 3 or the second bearing member 41 respectively. Preferably, at least two pulleys 51 are provided, and the two pulleys 51 are arranged at the same height, and the rope 52 is wrapped around the two pulleys 51 and supported by the two pulleys 51. Such an arrangement can reduce the volume and mass of the pulley 51 and make the arrangement more flexible. For example, the distance between the two ends of the rope 52 can be adjusted by adjusting the horizontal distance between the two pulleys 51.

[0040] In addition, the rope 52 can be made of known conventional materials. In order to ensure the life and reliability of the rope 52, preferably, the rope 52 is a steel wire rope.

[0041] See also Figure 3 , special attention should be paid to increase the detection stations of the bottom arch deformation measuring device of the can, so that different detection stations are dedicated to placing sample cans of different can heights, and on this basis, the advantage of easy measurement is taken into account. Preferably, the measuring assembly also includes a telescopic cylinder 42 hinged on the second bearing member 41 and placed horizontally, a swing rod 43 connected to the piston rod of the telescopic cylinder 42 and driven by the piston rod of the telescopic cylinder 42 to swing horizontally, a swing shaft 44 fixed to the other end of the swing shaft 43 and placed vertically, and a crossbeam 45 fixedly connected to the swing shaft 44 and placed horizontally. The swing shaft 44 is pivotally connected to the second bearing member 41 to ensure that the swing shaft 44 can be supported and rotated normally. The telescopic cylinder 42 is used to drive the crossbeam 45 to make horizontal rotational movement and switch to different detection stations on the frame 1.

[0042] The deformation measuring part includes a micrometer 46, which is placed vertically and fixed to the crossbeam 45. The micrometer 46 is used to detect the deformation of the bottom arch of the sample tank (it needs to be explained here that the general micrometer 46 has a measuring stroke of 10 mm. When the micrometer 46 contacts the bottom arch of the sample tank, for example, assuming that it has been pre-compressed by 2 mm, there is a remaining measuring range of 8 mm. The micrometer 46 is automatically reset to zero to measure the deformation of the bottom arch of the sample tank after it is inflated).

[0043] During operation, since the telescopic cylinder 42 (preferably one end of the telescopic cylinder 42) is hinged to the second bearing member 41, the piston rod of the telescopic cylinder 42 drives the swing rod 43 to swing horizontally, thereby rotating the swing shaft 44 fixedly connected to the swing rod 43, and then causing the crossbeam 45 fixedly connected to the swing shaft 44 to rotate horizontally to different inspection stations. In actual products, two inspection stations are preferably provided, and the position can be controlled by the limit stroke of the telescopic cylinder 42.

[0044] See also Figure 3, more preferably, when the deformation measuring part adopts a micrometer 46. A support column 47 is provided on the frame 1, and the support column 47 is located below the crossbeam 45, and the support column 47 is used to support and limit the crossbeam 45. It should be noted here that when the support column 47 is not provided, when the first bearing member 3 descends, the first bearing member 3 needs to take into account the position of the second bearing member 41 (the first bearing member 3 cannot be excessively descended, that is, the second bearing member 41 needs to be supported), so as to prevent the second bearing member 41 from still descending after the micrometer 46 touches the bottom arch of the sample tank, thereby causing the measuring needle of the micrometer 46 to be compressed and resulting in insufficient measurement range (that is, assuming that the measuring needle of the micrometer 46 is compressed by 9.5mm, the remaining 0.5mm is insufficient to measure the deformation of the bottom arch). Therefore, after adding support columns 47 to the frame 1, during measurement, the lifting cylinder 2 drives the first bearing member 3 to descend, so that the second bearing member 41 descends due to gravity and the deformation measuring member contacts the sample can; when the deformation measuring member touches the sample can, it is just limited and supported by the support column 47, thereby preventing the first bearing member 3 from continuing to descend, so that the micrometer 46 can be measured normally without greatly compressing the micrometer 46 and causing the micrometer 46 to have insufficient range. It needs to be further explained that due to the setting of the support column 47, when the first bearing member 3 descends, the second bearing member 41 descends due to gravity; when the second bearing member 41 is limited by the support column 47, the first bearing member 3 can continue to descend; thereby ensuring that the first bearing member 3 does not support the second bearing member 41, so as to ensure that the micrometer 46 fixed on the second bearing member 41 contacts the bottom arch of the sample can, making the measurement result more reliable.

[0045] Obviously, when one support column 47 is used with multiple stations, the volume of the support column 47 needs to be large and occupy a large space. In order to reduce the volume of the support column 47, preferably, the support column 47 is provided with a plurality of support columns 47, and the plurality of support columns 47 are respectively arranged at different detection stations on the frame 1.

[0046] Preferably, since the heights of sample cans at different workstations may be inconsistent, the support column 47 is threadedly connected to the frame 1 so that the height of the support column 47 is adjustable to match the measurement needs at different positions, that is, the first carrier 3 and the second carrier 41 are separated in time.

[0047] Furthermore, in order to increase the output distance of the telescopic cylinder 42, thereby increasing the rotation amplitude of the crossbeam 45, to ensure that there is a sufficient distance between the measuring stations, so as to facilitate the placement and removal of the sample can, preferably, the piston rod of the telescopic cylinder 42 is fixedly connected to an output rod, and the other end of the output rod is hinged to the swing rod 43 and is used to drive the swing rod 43 to swing horizontally.

[0048] It should also be noted that the telescopic cylinder 42 and the lifting cylinder 2 are both common cylinders used to output linear motion.

[0049] Embodiment 2:

[0050] Figure 1 and Figure 2 The second embodiment of the present invention is a can bottom arch deformation measuring device (necessarily referring to Figure 3 and Figure 4 ), the second embodiment provides a can bottom arch deformation measuring device including the first embodiment, which is different from the first embodiment in that: it can be understood that the deformation measuring member can be the micrometer 46 of the first embodiment, and can also be replaced by a grating ruler 48 (the grating ruler 48 is a mature prior art, having a guide rail and a slider, and its reading head is fixed on the slider) and a measuring rod 49. The specific scheme is as follows:

[0051] Preferably, the measuring assembly further comprises a telescopic cylinder 42 hinged on the second bearing member 41 and placed horizontally, a swing rod 43 drivingly connected to the piston rod of the telescopic cylinder 42 and driven by the piston rod of the telescopic cylinder 42 to swing horizontally, and a swing shaft 44 fixed to the other end of the swing rod 43 and placed vertically. The swing shaft 44 is pivotally connected to the second bearing member 41 to ensure that the swing shaft 44 can be supported and rotated normally.

[0052] The deformation measuring part includes a grating scale 48 and a measuring rod 49. The guide rail 481 of the grating scale is placed vertically, the slider 482 of the grating scale is slidably connected to the guide rail 481 of the grating scale and fixed to the second carrier 41, and the measuring rod 49 is placed horizontally and fixed to the swing shaft 44 (that is, the beam 45 in the first embodiment is replaced by the measuring rod 49).

[0053] The telescopic cylinder 42 is used to drive the measuring rod 49 to perform horizontal rotational movement and switch to different detection positions on the frame 1.

[0054] It can be understood that, unlike the micrometer 46, in the second embodiment, when the first carrier 3 descends, it is not necessary to take into account the position of the second carrier 41, because when the second carrier 41 descends to the point where the measuring rod 49 touches the bottom arch of the sample tank, the measuring rod 49 squeezes the bottom arch of the sample tank (i.e., the measuring rod 49 is supported by the sample tank) and the second carrier 41 no longer follows the first carrier 3 to continue descending. This not only ensures that the second carrier 41 reliably contacts the bottom arch of the sample tank and makes the measurement result more accurate, but also reduces the design difficulty of the first carrier 3 and the lifting cylinder 2, and is more convenient to use. Moreover, there is no need to adjust the support column 47 in the first embodiment to complete the rapid and accurate measurement of sample tanks of different tank heights, and the measurement efficiency is higher.

[0055] It needs to be explained that, during measurement, after the sample tank is inflated and pressurized, the deformation of the bottom arch causes the displacement of the measuring rod 49. Since the measuring rod 49 moves up and down together with the second carrier 41, and the slider 482 of the grating scale is fixed to the second carrier 41, that is, the displacement of the measuring rod 49 is ultimately fed back as the displacement of the slider 482 of the grating scale, thereby the grating scale 48 completes the measurement of the deformation of the bottom arch of the sample tank.

[0056] In addition, it should be noted that the counterweight block 54 eliminates most of the weight of the second support member 41 and the object fixed to the second support member 41, so that the measuring rod 49 acts on the bottom of the tank with less gravity, and then the measuring rod 49 can be easily pushed upward when the bottom arch is deformed, thereby reducing the measurement error.

[0057] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. Can bottom arch deformation measuring device, characterized by: It includes a frame, a lifting cylinder installed on the frame, and a measuring A measuring assembly, a first bearing member fixed on the piston rod of the lifting cylinder; The measuring assembly includes a second bearing member and a deformation measuring member fixed to the second bearing member. The lifting member movably sleeves the piston rod of the lifting cylinder and can be supported by the first bearing member and follow the first bearing member The deformation measuring member is used to detect the deformation of the bottom arch of the sample tank; During measurement, after the sample can is clamped, the lifting cylinder drives the first bearing member to descend, thereby causing the second bearing member to The piece falls due to gravity, causing the deformation measuring piece to contact the sample tank; After the measurement is completed, the lifting cylinder drives the first bearing member to rise, so that the deformation measuring member is supported by the first bearing member to rise and move away from the sample tank; The measuring assembly further comprises a telescopic cylinder hinged on the second bearing member and placed horizontally, a swing arm drivingly connected to the piston rod of the telescopic cylinder and driven by the piston rod of the telescopic cylinder to swing horizontally, a swing shaft fixed to the other end of the swing arm and placed vertically, and a horizontal beam fixedly connected to the swing shaft; the swing shaft is pivotally connected to the second bearing member; the telescopic cylinder is used to drive the horizontal beam to perform horizontal rotational motion and switch to different detection positions on the frame; The deformation measuring member comprises a micrometer, which is vertically placed and fixed to the crossbeam, and is used to detect the deformation of the bottom arch of the sample tank; The frame is provided with a support column, the support column is located below the crossbeam, and the support column is used to support and limit the crossbeam; There are a plurality of support columns, and the plurality of support columns are respectively arranged at different detection positions on the frame; The support column is threadedly connected to the frame.

2. The can bottom arch deformation measuring device according to claim 1, characterized in that: The can bottom arch deformation measuring device also includes: a pulley installed on the frame, a rope wrapped around the pulley and supported by the pulley, a guide column vertically fixed to the frame, and a counterweight block slidably connected to the guide column; one end of the rope is fixed to the counterweight block, and the other end is fixed to the first bearing member or the second bearing member.

3. The can bottom arch deformation measuring device according to claim 2, characterized in that: The pulley is a fixed pulley, and at least two pulleys are provided, the two pulleys are arranged at the same height, and the rope is wound around the two pulleys and supported by the two pulleys.

4. The can bottom arch deformation measuring device according to claim 2, characterized in that: The rope is a steel wire rope.

5. The can bottom arch deformation measuring device according to claim 1, characterized in that: The measuring assembly further comprises a telescopic cylinder hinged on the second bearing member and placed horizontally, a swing rod drivingly connected to the piston rod of the telescopic cylinder and driven by the piston rod of the telescopic cylinder to swing horizontally, and a swing shaft fixed to the other end of the swing rod and placed vertically; the swing shaft is pivotally connected to the second bearing member; the deformation measuring member comprises a grating ruler and a measuring rod, the guide rail of the grating ruler is placed vertically, the slider of the grating ruler is slidably connected to the guide rail of the grating ruler and fixed to the second bearing member, and the measuring rod is placed horizontally and fixed to the swing shaft; The telescopic cylinder is used to drive the measuring rod to perform horizontal rotational movement and switch to different detection positions on the frame.

6. The device for measuring deformation of bottom arch of cans according to claim 1 or 5, characterized in that: The piston rod of the telescopic cylinder is fixedly connected to an output rod, and the other end of the output rod is hinged to the swing rod and is used to drive the swing rod to swing horizontally.

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