An instrument and detection method for detecting leakage of vacuum container using deformation force feedback

Abstract

The present invention belongs to the technical field of water cup manufacturing, and in particular, relates to an instrument for detecting vacuum container leakage using deformation force feedback and a detection method thereof, wherein the instrument comprises a machine base, on which a placement seat, a pressing assembly and a pressure sensor are arranged. The placement seat is used to place the container to be tested; the pressing assembly is arranged above the placement seat, and the pressing assembly can be close to the placement seat and press against the container on the placement seat or away from the placement seat; the pressure sensor is arranged at the end of the pressing assembly facing the placement seat, and the pressure sensor is used to detect the deformation resistance of the container when the pressing assembly is pressed down to the container. The instrument does not consume additional heating energy, has low energy consumption, a simple detection method, and reliable measurement results.

Description

Technical Field

[0001] The invention belongs to the technical field of water cup manufacturing, and in particular relates to an instrument for detecting leakage of a vacuum container by using deformation force feedback and a detection method thereof. Background Art

[0002] Existing metal insulation containers, such as thermos cups and flasks, all adopt a double-layer structure, and then evacuate the double-layer structure to form a vacuum interlayer, which achieves the insulation function. The vacuum degree of the metal insulation container is the key factor to ensure the insulation performance. The higher the vacuum degree of the insulation container, the better its insulation performance. Therefore, the detection of vacuum degree (i.e. insulation performance) is very important for metal insulation containers.

[0003] Currently, the industry uses the principles of thermodynamics to detect the vacuum leakage of metal insulation containers. The specific detection method is as follows: by spraying hot air at a certain temperature into the container, the inner side of the insulation container is continuously heated. After heating for a certain period of time, the operator touches the outer surface of the insulation container and manually senses the temperature of the outer surface of the insulation container to determine whether the vacuum degree (insulation performance) of the insulation container meets the standard; when the vacuum degree of the insulation container does not meet the standard, there will be more air in the vacuum interlayer, so the heat on the inside of the insulation container will quickly transfer to the outer surface of the insulation container, causing the outer surface of the insulation container to reach a higher temperature. Therefore, the higher the temperature of the outer surface of the insulation container, the worse the vacuum degree (insulation performance) of the insulation container.

[0004] The existing detection method requires manual subjective judgment, resulting in large detection errors. In addition, hot air or hot water is required during the detection process, and hot air or hot water is generated by heating the air with electric energy, which consumes a lot of electric energy. Summary of the invention

[0005] The purpose of the present invention is to provide an instrument and a detection method for detecting leakage of a vacuum container using deformation force feedback in order to solve the above-mentioned technical problems, so as to achieve the effects of low energy consumption, simple detection method and reliable measurement results.

[0006] In view of this, the present invention provides an instrument for detecting leakage of a vacuum container using deformation force feedback and a detection method thereof, comprising a machine base, on which is disposed:

[0007] A placement seat, the placement seat is used to place the container to be tested;

[0008] A pressing component, which is arranged above the placement seat, and can be close to the placement seat to press the container on the placement seat or away from the placement seat;

[0009] The pressure sensor is arranged at the end of the pressing component facing the placement seat, and the pressure sensor is used to detect the deformation resistance of the container when the pressing component is pressed down onto the container.

[0010] In this technical solution, the instrument has no additional heating energy consumption, low energy consumption, simple detection method, and reliable measurement results.

[0011] Furthermore, the pressing assembly includes a pressing head and an electric cylinder, the electric cylinder is fixedly arranged on the machine base, the pressing head is connected to the output end of the electric cylinder, and the pressure sensor is connected to one end of the pressing head away from the electric cylinder.

[0012] Furthermore, the placement seat is a V-shaped block, and the container to be tested is cylindrically arranged on the V-shaped block.

[0013] Furthermore, the instrument also includes a position switching component, and the position switching component is used to change the position of the container to be tested facing the pressure sensor.

[0014] In this technical solution, different positions of the container to be tested are made to face the pressure sensor, and multiple pressure measurements are performed to obtain multiple sets of data, thereby improving the reliability of the test results.

[0015] Furthermore, the position switching component includes:

[0016] Two transverse slides are provided, which are respectively located on both sides of the placement seat, and transverse sliders are slidably provided on the transverse slides;

[0017] Two longitudinal slides are provided, which are respectively located on both sides of the placement seat, and longitudinal sliders are slidably provided on the longitudinal slides;

[0018] Pneumatic fingers, the pneumatic fingers are fixedly arranged on the machine base, and the pneumatic fingers include two clamping fingers that can move closer to or farther away from each other;

[0019] A rotary cylinder, wherein the rotary cylinder is fixedly mounted on one of the longitudinal sliders, the rotary axis of the rotary cylinder is perpendicular to the sliding direction of the longitudinal slider, a first clamping plate is mounted on the output end of the rotary cylinder, and a second clamping plate is mounted on the other longitudinal slider;

[0020] A lifting cylinder, wherein the lifting cylinder is fixedly arranged on the machine base, a lifting block is fixedly connected to the output end of the lifting cylinder, a lifting shaft is horizontally passed through the lifting block, two ends of the lifting shaft pass through two longitudinal sliders respectively, two connecting sleeves are slidably connected to the lifting shaft, and the two connecting sleeves are fixedly connected to the two longitudinal sliders respectively;

[0021] The two clamping fingers of the pneumatic finger are respectively fixedly connected to the two transverse sliders, and the two longitudinal slide seats are respectively arranged on the top of the two transverse sliders and are fixedly connected to the transverse sliders.

[0022] In the present technical scheme, after the pressing component is pressed down once, the first data is obtained, and then the pressing component is lifted up away from the placement seat. Then the data of the next position needs to be detected, and the pneumatic fingers are started to make the first clamping plate and the second clamping plate close to each other to clamp the container to be tested, and then the lifting cylinder is started to make the lifting shaft move upward with the two longitudinal sliders, and move the container to be tested clamped by the first clamping plate and the second clamping plate upward away from the placement seat, and then the rotary cylinder is started to rotate the container to be tested by a preset angle, and then the lifting cylinder piston rod is extended to make the two longitudinal sliders move downward and reset so that the container to be tested is re-placed on the placement seat, and then the clamping fingers of the pneumatic fingers are reset away from each other, so that the two transverse sliders slide away from each other with the first clamping plate and the second clamping plate, and the container to be tested is released, and then the next data can be measured. Lifting the container to be tested and then rotating it a certain angle can prevent the container to be tested from being scratched when it rotates directly on the placement seat.

[0023] Furthermore, limiting components are arranged on both sides of the placement seat, and the limiting components are used to reduce the elastic deformation of the entire container along the direction perpendicular to the downward pressure when the container to be tested is pressed downward by the downward pressure component.

[0024] In the technical solution, the container is a water cup in a cylindrical shape. Pressing down on the container from the top will cause the entire container to deform outward as a whole along the diameter direction. The deformation thus produced is the sum of the deformation on the overall contour of the container and the deformation on the interlayer. The limiting component is used to limit and reduce the deformation within the overall range of the container, eliminating the overall deformation factor of the container, so that when the container is pressed, deformation mainly occurs within the interlayer, thereby improving the accuracy of interlayer vacuum leakage detection.

[0025] Furthermore, the restriction component includes:

[0026] A driving sleeve, wherein the driving sleeve is fixedly connected to the pressure head, and two L-shaped rods are symmetrically extended outward from the driving sleeve, and the ends of the L-shaped rods away from the pressure head are connected to driving blocks, and the opposite surfaces of the two driving blocks are inclined first inclined surfaces;

[0027] A limiting slide seat, wherein two limiting slide seats are provided and are respectively arranged on both sides of the placement seat;

[0028] There are two limiting sliders, which are slidably set on two limiting slides respectively. A circular arc-shaped limiting plate matching the outer circumferential surface of the container to be tested is fixedly set on the surface of the limiting slider facing the other limiting slider. A limiting groove is also opened on the limiting slider, and one side wall of the limiting groove is a second inclined surface that can match the first inclined surface.

[0029] Furthermore, a baffle is vertically arranged on the limiting slide, and the limiting slide is slidably arranged between the baffle and the container to be tested. A connecting hole is opened on the baffle along the sliding direction of the limiting slide, and a reset rod slides through the connecting hole. One end of the reset rod is fixedly connected to the limiting slide, and the other end extends out of the baffle. A reset spring is sleeved on the reset rod between the baffle and the end of the reset rod away from the limiting slide, and the reset spring always has a movement tendency to push the reset rod to move in the direction away from the container to be tested.

[0030] In this technical solution, when the pressure sensor obtains pressure data, the pressure head moves up, the first inclined surface no longer presses the second inclined surface, and the compressed reset spring will stretch to make the reset rod slide and reset with the limiting slider.

[0031] Furthermore, the detection method of the instrument comprises the following steps:

[0032] S1: Press down. The pressing assembly presses down and carries the pressure sensor downward to move the empty stroke first, until the pressure sensor feedbacks a value that is the same as the preset value in the instrument, and then calibrates the detection zero position. The pressing assembly continues to press down and moves a fixed distance to make the wall of the container to be tested produce elastic deformation. At this time, the value detected by the pressure sensor is the deformation resistance feedback value. In the process of the elastic deformation of the wall of the container to be tested, the two arc-shaped limiting plates of the limiting assembly also gradually press the container to be tested, limiting the elastic deformation of the container to be tested as a whole along the direction perpendicular to the downward pressure;

[0033] S2: Position switching. After obtaining the first feedback value, the pressing component is lifted and away from the container to be tested. The position switching component clamps the container to be tested through the pneumatic fingers and lifts the container to be tested through the lifting cylinder. Then, the container to be tested is rotated 120° through the rotary cylinder and the container to be tested is relocated to the placement seat.

[0034] S3: Repeat the measurement, repeat steps S2-S3 three times to obtain three feedback values;

[0035] S4: judgement: if two or more of the three feedback values ​​exceed the standard value, it is judged as NG; if one or less of the three feedback values ​​exceed the standard value, it is judged as OK.

[0036] The beneficial effects of the present invention are:

[0037] 1. This instrument has no additional heating energy consumption, low energy consumption, simple detection method, and reliable measurement results.

[0038] 2. The position switching component is used to change the position of the container to be tested facing the pressure sensor. Multiple pressure measurements can be performed to obtain multiple sets of data, thereby improving the reliability of the test results.

[0039] 3. Lifting the container to be tested and then rotating it at a certain angle can prevent the container to be tested from being scratched by rotating directly on the mounting seat.

[0040] 4. The restriction component reduces the elastic deformation of the entire container along the direction perpendicular to the downward pressure when the container is pressed by the downward pressure component, so that the container is mainly deformed within the interlayer when it is pressed, rather than being pressed into an ellipse as a whole, eliminating the overall deformation factor of the container and improving the accuracy of interlayer vacuum leakage detection.

[0041] 5. The two arc-shaped limiting plates of the limiting assembly are gradually fed together with the pressure head to be tested, so that the limiting deformation is synchronously generated with the downward pressure, which can make the limiting action more controllable and improve the accuracy of interlayer vacuum leakage detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a three-dimensional diagram when the pressure head of the instrument is not pressed down;

[0043] Figure 2 It is the front view of the present invention;

[0044] Figure 3 It is a schematic diagram of the deformation of the container when it is compressed;

[0045] Figure 4 It is a three-dimensional picture after the pressure head of the instrument is pressed down;

[0046] Figure 5 It is a cross-sectional view of the container after the pressure head of the instrument is pressed down;

[0047] Figure 6 It is a schematic diagram when the limiting component is away from the container;

[0048] Figure 7 yes Figure 6 Half-section of

[0049] Figure 8 This is a schematic diagram of when the limiting component limits the container;

[0050] The symbols in the figure are:

[0051] 1. Machine base; 2. Placement seat; 3. Container to be tested; 4. Pressure sensor; 5. Pressure head; 6. Electric cylinder; 7. Horizontal slide; 8. Horizontal slider; 9. Longitudinal slide; 10. Longitudinal slider; 11. Pneumatic finger; 12. Clamp finger; 13. Rotary cylinder; 14. First clamping plate; 15. Second clamping plate; 16. Lifting cylinder; 17. Lifting block; 18. Lifting shaft; 19. Connecting sleeve; 20. Limiting assembly; 21. Driving sleeve; 22. L-shaped rod; 23. Driving block; 24. First inclined plane; 25. Limiting slide; 26. Limiting slider; 27. Limiting plate; 28. Limiting groove; 29. ​​Second inclined plane; 30. Baffle; 31. Connecting hole; 32. Reset rod; 33. Reset spring; 34. Interlayer. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0053] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0054] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0055] It should be noted that, in the description of the present application, the orientation or positional relationship indicated by terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the orientation words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0056] It should be noted that, in the present application, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0057] Example 1

[0058] like Figure 1-2 As shown, an instrument for detecting leakage of a vacuum container using deformation force feedback and a detection method thereof, comprising a machine base 1, on which a seating seat 2, a pressing assembly and a pressure sensor 4 are arranged. The seating seat 2 is used to place a container 3 to be tested; the seating seat 2 is a V-shaped block, and the container 3 to be tested is cylindrically arranged on the V-shaped block. The pressing assembly is arranged above the seating seat 2, and the pressing assembly can be close to the seating seat 2 and press toward the container on the seating seat 2 or away from the seating seat 2. The pressing assembly comprises a pressure head 5 and an electric cylinder 6, and the electric cylinder 6 is fixedly arranged on the machine base 1. The output end of the electric cylinder 6 is connected to the pressure head 5, and the pressure sensor 4 is connected to the end of the pressure head 5 away from the electric cylinder 6. The pressure sensor 4 is used to detect the deformation resistance of the container when the pressing assembly is pressed down to the container.

[0059] When adjusting the machine, a container with a vacuum degree at the qualified value limit is used as an adjusting part, and the standard value of the pressure sensor 4 is debugged. The container is placed on the mounting seat 2. The pressing component first takes the pressure sensor 4 to move downward in an empty stroke until the pressure sensor 4 feeds back a fixed value and then stops. This fixed value is a set value. The meaning of this stop logic is to ensure that the pressure is pressed on the outer surface of the container every time. The stop position is the detection zero position, and then continue to press down for a fixed distance, such as 0.5 mm, to make the container wall produce elastic deformation. At this time, the value detected by the pressure sensor 4 is the deformation resistance feedback value. If the value measured by the pressure sensor 4 is greater than the standard value, it is NG. If the value measured by the pressure sensor 4 is less than the standard value, it is OK. For the same batch of products, the materials used for the container walls are all produced in the same batch. Therefore, the strength difference between the container walls produced in the same batch can be basically ignored. The different forces sensed by the contacts of the pressure sensor 4 each time can basically be considered to be caused by different pressures in the interlayer 34. The principle is: after the empty stroke, when the downward pressure and downward pressure stroke detected each time are the same, the pressure inside the vacuum interlayer 34 of the leaking container, i.e., the container whose vacuum degree does not meet the requirements, is too high, so the resistance to the downward pressure becomes greater, and the force fed back to the contact of the pressure sensor 4 will be large. If the measured value is greater than the standard value, it is NG. From the deformation point of view, the pressure inside the leaking container, i.e., the container whose vacuum degree does not meet the requirements, is too high, and the deformation of the container is small when under pressure, and the contact of the pressure sensor 4 will be more compressed, which will make the measured value greater than the standard value, which is NG. This instrument does not consume additional heating energy, has low energy consumption, simple detection method, and reliable measurement results.

[0060] Example 2

[0061] like Figure 1-2 As shown, the instrument further includes a position switching component, which is used to change the position of the container 3 to be tested facing the pressure sensor 4. By making different positions of the container 3 to be tested face the pressure sensor 4 and performing multiple downward pressure measurements, multiple sets of data can be obtained, thereby improving the reliability of the test results.

[0062] The position switching assembly includes a transverse slide 7, a longitudinal slide 9, a pneumatic finger 11, a rotary cylinder 13 and a lifting cylinder 16. There are two transverse slides 7, which are respectively located on both sides of the placement seat 2, and a transverse slider 8 is slidably arranged on the transverse slide 7; there are two longitudinal slides 9, which are respectively located on both sides of the placement seat 2, and a longitudinal slider 10 is slidably arranged on the longitudinal slide 9; the pneumatic finger 11 is fixedly arranged on the machine base 1, and the pneumatic finger 11 includes two clamping fingers 12 that can move closer to or away from each other; the rotary cylinder 13 is fixedly arranged on one of the longitudinal sliders 10, and the rotary axis of the rotary cylinder 13 is perpendicular to the sliding direction of the longitudinal slider 10, and a first clamping plate is arranged on the output end of the rotary cylinder 13. 14, a second clamping plate 15 on the other longitudinal slider 10; the lifting cylinder 16 is fixedly arranged on the machine base 1, and a lifting block 17 is fixedly connected to the output end of the lifting cylinder 16, and a lifting shaft 18 is crossed on the lifting block 17, and both ends of the lifting shaft 18 pass through the two longitudinal sliders 10 respectively, and two connecting sleeves 19 are slidably connected to the lifting shaft 18, and the two connecting sleeves 19 are respectively fixedly connected to the two longitudinal sliders 10; the two clamping fingers 12 of the pneumatic finger 11 are respectively fixedly connected to the two transverse sliders 8, and the two longitudinal slides 9 are respectively arranged on the top of the two transverse sliders 8 and fixedly connected to the transverse sliders 8.

[0063] After the pressing assembly is pressed down once, the first data is obtained, and then the pressing assembly is lifted up and away from the placement seat 2. Then the data of the next position needs to be detected, and the pneumatic finger 11 is started to make the first clamping plate 14 and the second clamping plate 15 close to each other to clamp the container 3 to be tested, and then the lifting cylinder 16 is started to make the lifting shaft 18 move upward with the two longitudinal sliders 10, and move the container 3 to be tested clamped by the first clamping plate 14 and the second clamping plate 15 upward away from the placement seat 2, and then the rotary cylinder 13 is started to rotate the container 3 to be tested by a preset angle, and then the piston rod of the lifting cylinder 16 is extended to make the two longitudinal sliders 10 move downward and reset so that the container 3 to be tested is re-placed on the placement seat 2, and then the clamping fingers 12 of the pneumatic finger 11 are reset away from each other, so that the two transverse sliders 8 slide away from each other with the first clamping plate 14 and the second clamping plate 15, and release the container 3 to be tested, and then the next data can be measured. Lifting the container 3 to be tested and then rotating it by a certain angle can prevent the container 3 to be tested from being scratched directly when it rotates on the placement seat 2.

[0064] Example 3

[0065] like Figure 3-8 As shown, the two sides of the placement seat 2 are provided with limiting components 20, which are used to reduce the elastic deformation of the container 3 to be tested along the direction perpendicular to the downward pressure when the downward pressure component presses down. Figure 3As shown, the container is a water cup in a cylindrical shape. Pressing down on the container from the top will cause the entire container to deform outward as a whole along the diameter direction. The deformation thus generated is the sum of the deformation on the overall contour of the container and the deformation on the interlayer 34, that is, the comprehensive deformation within the range of H and h. The deformation of the interlayer 34, that is, the deformation within the range of h when being pressed, is related to the leakage of the interlayer 34. Therefore, the deformation within the range of H of the entire container will affect the accuracy of the vacuum leakage detection of the interlayer 34. The limiting component 20 is used to limit and reduce the deformation within the range of H of the entire container, eliminates the overall deformation factor of the container, and makes the container mainly produce deformation within the range of h when being pressed, thereby improving the accuracy of the vacuum leakage detection of the interlayer 34.

[0066] like Figure 4-8 As shown, the limiting assembly 20 includes a driving sleeve 21, a limiting slide 25 and a limiting slider 26. The driving sleeve 21 is fixedly connected to the pressure head 5, and two L-shaped rods 22 are symmetrically extended outward from the driving sleeve 21. The end of the L-shaped rod 22 away from the pressure head 5 is connected to a driving block 23, and the opposite surfaces of the two driving blocks 23 are inclined first inclined surfaces 24; two limiting slides 25 are provided and are respectively arranged on both sides of the placement seat 2; two limiting sliders 26 are provided, which are slidably arranged on the two limiting slides 25, and a circular arc-shaped limiting plate 27 matching the outer peripheral surface of the container 3 to be tested is fixedly arranged on the surface of the limiting slider 26 facing the other limiting slider 26, and a limiting groove 28 is also provided on the limiting slider 26, and one side wall of the limiting groove 28 is a second inclined surface 29 that can match the first inclined surface 24.

[0067] As the pressure head 5 moves downward, when the pressure head 5 enters the limiting groove 28, the continued downward movement will cause the first inclined surface 24 of the driving block 23 to squeeze the second inclined surface 29, thereby driving the limiting slider 26 to slide on the limiting slide 25, so that the two limiting sliders 26 gradually approach each other and the limiting plate 27 approaches the container 3 to be tested. When adjusting the machine, the adjustment parts are used as standard parts to set the position of the limiting slider 26, so that when the pressure head 5 is pressed to the surface of the container 3 to be tested, the two arc-shaped limiting plates 27 are also basically attached to the surface of the container 3 to be tested, and there is a little gap. After testing, when the inclination angle of the first inclined surface 24 is 30°, the size of the gap is about 0.15mm. Then, when the pressure head 5 continues to press the container 3 to be tested downward to cause it to produce elastic deformation, the two arc-shaped limiting plates 27 also gradually approach, and the limiting container as a whole produces elastic deformation along the direction perpendicular to the downward pressure. This method of gradually feeding together with the pressure head 5 to be tested makes the limiting deformation occur synchronously with the downward pressure, which can make the limiting action more controllable and improve the accuracy of the vacuum leakage detection of the interlayer 34.

[0068] A baffle 30 is vertically arranged on the limiting slide 25, and the limiting slide 26 is slidably arranged between the baffle 30 and the container 3 to be tested. A connecting hole 31 is opened on the baffle 30 along the sliding direction of the limiting slide 26, and a reset rod 32 slides through the connecting hole 31. One end of the reset rod 32 is fixed to the limiting slide 26, and the other end extends out of the baffle 30. A reset spring 33 is sleeved on the reset rod 32 between the baffle 30 and the end of the reset rod 32 away from the limiting slide 26. The reset spring 33 always has a movement tendency to push the reset rod 32 to move away from the container 3 to be tested. When the pressure sensor 4 obtains the pressure data, the pressure head 5 moves up, and the first inclined surface 24 no longer presses the second inclined surface 29, and the compressed reset spring 33 will stretch to make the reset rod 32 slide and reset with the limiting slide 26.

[0069] The detection method of the instrument includes the following steps:

[0070] S1: Press down. The pressing assembly presses down and brings the pressure sensor 4 down to an empty stroke first. After the pressure sensor 4 feeds back a value that is the same as the preset value in the instrument, the detection zero position is calibrated. The pressing assembly continues to press down and travels a fixed distance to cause the wall of the container 3 to produce elastic deformation. At this time, the value detected by the pressure sensor 4 is the deformation resistance feedback value. In the process of the elastic deformation of the wall of the container 3 to be tested, the two arc-shaped limiting plates 27 of the limiting assembly 20 also gradually press the container 3 to be tested, limiting the elastic deformation of the container 3 as a whole along the direction perpendicular to the downward pressure.

[0071] S2: Position switching. After obtaining the first feedback value, the pressing component is lifted and away from the container 3 to be tested. The position switching component clamps the container 3 to be tested through the pneumatic fingers 11, and lifts the container 3 to be tested through the lifting cylinder 16. Then, the container 3 to be tested is rotated 120° by the rotary cylinder 13, and the container 3 to be tested is relocated to the placement seat 2.

[0072] S3: Repeat the measurement, repeat steps S2-S3 three times to obtain three feedback values;

[0073] S4: judgement: if two or more of the three feedback values ​​exceed the standard value, it is judged as NG; if one or less of the three feedback values ​​exceed the standard value, it is judged as OK.

[0074] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. An instrument for detecting leakage of a vacuum container using deformation force feedback, characterized in that , comprising a base (1), on which is disposed: A placement seat (2), the placement seat (2) being used to place the container to be tested (3); A pressing component, the pressing component being arranged above the placement seat (2), and the pressing component being able to approach the placement seat (2) and press toward the container on the placement seat (2) or to move away from the placement seat (2); A pressure sensor (4), the pressure sensor (4) being arranged at the end of the pressing component facing the placement seat (2), the pressure sensor (4) being used to detect the deformation resistance of the container when the pressing component is pressed down onto the container; The pressing assembly comprises a pressing head (5) and an electric cylinder (6), wherein the electric cylinder (6) is fixedly arranged on the machine base (1), the output end of the electric cylinder (6) is connected to the pressing head (5), and the pressure sensor (4) is connected to an end of the pressing head (5) away from the electric cylinder (6); The placement seat (2) is a V-shaped block, and the container to be tested (3) is cylindrically arranged on the V-shaped block; Limiting components (20) are arranged on both sides of the placement seat (2), and the limiting components (20) are used to reduce the elastic deformation of the entire container (3) to be tested along a direction perpendicular to the downward pressure when the downward pressure component presses the container downward; The limiting component (20) comprises: A driving sleeve (21), wherein the driving sleeve (21) is fixedly connected to the pressure head (5), and two L-shaped rods (22) are symmetrically extended outward from the driving sleeve (21), and the ends of the L-shaped rods (22) away from the pressure head (5) are connected to driving blocks (23), and the opposing surfaces of the two driving blocks (23) are inclined first inclined surfaces (24); A limiting slide seat (25), wherein two limiting slide seats (25) are provided and are respectively arranged on both sides of the placement seat (2); The limiting sliders (26) are provided with two limiting sliders (26), which are respectively slidably arranged on the two limiting slide seats (25). A circular arc limiting plate (27) matching the outer peripheral surface of the container (3) to be tested is fixedly arranged on the surface of the limiting slider (26) facing the other limiting slider (26). The limiting slider (26) is also provided with a limiting groove (28). One side wall of the limiting groove (28) is a second inclined surface (29) that can match the first inclined surface (24).

2. The instrument for detecting vacuum container leakage using deformation force feedback according to claim 1, characterized in that: The instrument further comprises a position switching component, wherein the position switching component is used to change the position of the container (3) to be tested facing the pressure sensor (4).

3. The instrument for detecting vacuum container leakage using deformation force feedback according to claim 2, characterized in that: The position switching component comprises: A transverse slide seat (7), wherein two transverse slide seats (7) are provided, and are respectively located on both sides of the placement seat (2), and a transverse slider (8) is slidably provided on the transverse slide seat (7); A longitudinal slide seat (9), wherein two longitudinal slide seats (9) are provided, and are respectively located on both sides of the placement seat (2), and a longitudinal slider (10) is slidably provided on the longitudinal slide seat (9); A pneumatic finger (11), wherein the pneumatic finger (11) is fixedly arranged on the machine base (1), and the pneumatic finger (11) comprises two clamping fingers (12) that can move closer to or farther away from each other; A rotary cylinder (13), wherein the rotary cylinder (13) is fixedly arranged on one of the longitudinal sliders (10), the rotary axis of the rotary cylinder (13) is perpendicular to the sliding direction of the longitudinal slider (10), a first clamping plate (14) is arranged on the output end of the rotary cylinder (13), and a second clamping plate (15) is arranged on the other longitudinal slider (10); A lifting cylinder (16), wherein the lifting cylinder (16) is fixedly arranged on the machine base (1), a lifting block (17) is fixedly connected to the output end of the lifting cylinder (16), a lifting shaft (18) is horizontally passed through the lifting block (17), two ends of the lifting shaft (18) respectively pass through two longitudinal sliders (10), two connecting sleeves (19) are slidably connected to the lifting shaft (18), and the two connecting sleeves (19) are respectively fixedly connected to the two longitudinal sliders (10); The two clamping fingers (12) of the pneumatic finger (11) are respectively fixedly connected to the two transverse sliders (8), and the two longitudinal slide seats (9) are respectively arranged on the top of the two transverse sliders (8) and are fixedly connected to the transverse sliders (8).

4. The instrument for detecting vacuum container leakage using deformation force feedback according to claim 3, characterized in that: A baffle (30) is vertically arranged on the limiting slide (25), and the limiting slide (26) is slidably arranged between the baffle (30) and the container (3) to be tested. A connecting hole (31) is opened on the baffle (30) along the sliding direction of the limiting slide (26), and a reset rod (32) slides through the connecting hole (31). One end of the reset rod (32) is fixedly connected to the limiting slide (26), and the other end extends out of the baffle (30). A reset spring (33) is sleeved on the reset rod (32) between the baffle (30) and the end of the reset rod (32) away from the limiting slide (26), and the reset spring (33) always has a movement tendency of pushing the reset rod (32) to move in a direction away from the container (3) to be tested.

5. A detection method for an instrument for detecting leakage of a vacuum container using deformation force feedback as claimed in claim 4, characterized in that: The following steps are involved: S1: Pressing down, the pressing assembly presses down and the pressure sensor (4) moves downward for an empty stroke first, until the pressure sensor (4) feeds back a value that is the same as the preset value in the instrument, calibrates the detection zero position, and the pressing assembly continues to press down, moving a fixed distance to cause the wall of the container (3) to be tested to produce elastic deformation. At this time, the value detected by the pressure sensor (4) is the deformation resistance feedback value. In the process of the wall of the container (3) to be tested to produce elastic deformation, the two arc-shaped limiting plates (27) of the limiting assembly (20) also gradually press the container (3) to be tested, limiting the overall elastic deformation of the container (3) to be tested in a direction perpendicular to the downward pressure; S2: Position switching. After obtaining the first feedback value, the pressing component is lifted and moved away from the container to be tested (3). The position switching component clamps, lifts, and rotates the container to be tested (3) to a preset angle, and then re-places the container to be tested (3) on the placement seat (2); S3: Repeat the measurement, repeat steps S2-S3 three times to obtain three feedback values; S4: judgement: if two or more of the three feedback values ​​exceed the standard value, it is judged as NG; if one or less of the three feedback values ​​exceed the standard value, it is judged as OK.

6. The instrument for detecting vacuum container leakage using deformation force feedback and the detection method thereof according to claim 5, characterized in that: In step S2, the position switching component controls the container (3) to be tested to rotate 120° each time.

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