Sealing detection equipment and method for paper cup production

Abstract

The present invention relates to the technical field of paper cup sealing detection, and more specifically, to a sealing detection device and method for paper cup production. The device comprises a pair of negative pressure columns, a liquid injection cylinder, a gas injection cylinder, and a lifting assembly. The present invention simultaneously performs liquid sealing detection and gas sealing detection on a paper cup to be detected by means of the provided liquid injection cylinder and gas injection cylinder. After the detection is completed, the negative pressure column is reset to form a negative pressure at the inner end of the gas injection cylinder, and the gas after the detection is completed is recycled. At the same time, the lifting assembly is used to adjust the position of the paper cup to be detected. Liquid at different positions on the inner end of the paper cup to be detected can evenly contact the bottom end of the liquid injection cylinder. The liquid injection cylinder in a negative pressure state is used to extract the detection liquid at different positions, thereby reducing the cleaning work of the detection personnel in the later stage, and at the same time, the detection liquid can be recycled.

Description

Technical Field

[0001] The present invention relates to the technical field of paper cup sealing detection, and in particular to a sealing detection device and method for paper cup production. Background Art

[0002] A paper cup is a paper container made by mechanically processing and gluing base paper made from chemical wood pulp. It has a cup-shaped appearance.

[0003] Paper cups are widely used in daily life, especially in the food industry, where they are often used to hold liquid beverages. Therefore, the sealing performance of paper cups is a key criterion for evaluating their quality. Existing paper cup sealing tests are mostly divided into two methods: water test and air pressure test. The water test involves injecting liquid into the paper cup and observing whether it leaks. The air pressure test involves placing the paper cup in a sealed container, applying a certain pressure of gas, and observing whether the cup bulges or cracks. Both tests can be used to test the sealing performance of paper cups. Traditional testing methods mostly rely on manual liquid and gas injection, followed by observing the changes in the paper cup before and after, as a basis for judging the sealing performance of the paper cup. However, existing testing methods still have the following problems:

[0004] First, manual operation is performed manually, which is inefficient.

[0005] Second, even if liquid or gas is injected mechanically, in order to reduce liquid loss and waste, manual liquid recovery is still required, that is, the liquid after testing is poured back into the test cavity.

[0006] Third, conducting water test and air pressure test separately is difficult to adapt to actual usage. Manual replacement is required to replace the paper cups that have completed water test or air pressure test to other test positions. The paper cups need to be manually processed again, and the detection efficiency is low. In addition, the paper cups are soft after being soaked in liquid and are easily deformed after manual replacement, which will affect the subsequent air pressure test.

[0007] In order to address the above problems, the present invention provides a sealing detection device and method for paper cup production. Summary of the Invention

[0008] The object of the present invention is to provide a sealing detection device and method for paper cup production to solve the problems raised in the above background technology.

[0009] To achieve the above-mentioned object, one of the objects of the present invention is to provide a sealing detection device for paper cup production, comprising a steering assembly and a bracket mounted on the top of the steering assembly, wherein both sides of the top of the bracket are provided with paper cup holders for lifting and fixing paper cups, and further comprising a test frame, wherein both ends of the test frame are connected to negative pressure columns, and the bottom ends of the two negative pressure columns are respectively provided with a liquid injection cylinder for liquid injection and a gas injection cylinder for gas injection, and the liquid injection cylinder and the gas injection cylinder are respectively placed directly above the two paper cup holders, and a hydraulic rod is provided on the top of the test frame, and the two negative pressure columns are driven to move up and down along the inner ends of the liquid injection cylinder and the gas injection cylinder by the hydraulic rod and the hydraulic rod. In the downward state, the pressure at the inner ends of the liquid injection cylinder and the gas injection cylinder increases, and the contained liquid and gas are respectively injected into the paper cups to be tested at the corresponding positions;

[0010] A lifting assembly is provided at the bottom end of the test frame near the liquid injection cylinder. During the upward movement of the test frame, the paper cup holder is lifted to drive the paper cup containing liquid to move upward, so that the liquid at different positions in the cup gradually contacts the bottom end of the liquid injection cylinder under negative pressure, and the liquid that has been tested is extracted by the negative pressure liquid injection cylinder.

[0011] As a further improvement of the present technical solution, the steering assembly includes a base and an arc-shaped guide rail. A servo motor is provided at the top of the base. The top of the servo motor is connected to the bottom of the bracket to drive the bracket to turn and cooperate to adjust the positions of the two paper cup holders.

[0012] As a further improvement of the present technical solution, pads are provided on both sides of the top of the bracket, the two paper cup sleeves are respectively placed at the top of the two pads, and a plurality of side frames are arranged in an array on the side of the top of the pad, and a sliding space for the paper cup sleeve to move up and down is formed between the side frames.

[0013] As a further improvement of the present technical solution, a slide groove is provided on the side of each side frame, and a column is provided at the inner end of the slide groove, a baffle is provided at the top of the column, and the cross-sectional size of the baffle is larger than the cross-sectional size of the column. A plurality of sliders are provided in an array on the side of the bottom end of the paper cup sleeve rack, and the sliders extend into the slide grooves at corresponding positions and are sleeved on the outside of the column, sliding up and down along the inner end of the slide groove.

[0014] As a further improvement of the present technical solution, the lifting assembly includes a downwardly inclined inclined plate, and the inclined plate is inclined toward the bottom end of the paper cup holder, and an upwardly inclined hook plate is provided at the bottom end of the inclined plate, and the hook plate and the inclined plate form a V-shaped structure, and the hook plate is made of elastic metal material.

[0015] As a further improvement of the present technical solution, a plurality of exhaust pipes are provided at the bottom end of the gas injection cylinder. The exhaust pipe arrays are distributed at the bottom end of the gas injection cylinder and are all connected to the inner end of the gas injection cylinder.

[0016] As a further improvement of the present technical solution, the test stand is provided with a cover plate on one side close to the gas injection cylinder, and a corrugated ring is provided at the bottom end of the cover plate. The corrugated ring moves downward synchronously with the test stand and is sleeved on the top position of the gas injection cylinder, so that the inner end of the gas injection cylinder forms a sealed state.

[0017] A second object of the present invention is to provide a device for realizing a sealing detection device for paper cup production, comprising the following method steps:

[0018] S1. Place the two paper cups to be tested on the inner ends of the two paper cup holders, with their ports facing upwards, facing the bottom ends of the liquid injection cylinder and the air injection cylinder respectively;

[0019] S2. The test frame is synchronously moved downward by the hydraulic rod. At this time, two negative pressure cylinders extend into the inner ends of the liquid injection cylinder and the gas injection cylinder respectively, and the air pressure at the inner ends of the two ends is increased, so that the liquid in the inner ends of the liquid injection cylinders is injected from the inside to the inner ends of the corresponding positions of the test paper cups. At the same time, under the action of the negative pressure cylinders, the bottom end of the gas injection cylinder discharges gas with a certain pressure outward, so that it enters the corresponding position of the test paper cup inward. The conditions of the two test paper cups are observed;

[0020] S3. The test stand is driven upward by the hydraulic rod, and the two negative pressure cylinders are driven upward simultaneously, so that the inner ends of the two paper cup holders are in a negative pressure state. The air injection cylinder in the negative pressure state draws air inward, and the air that has completed the test work at the inner end of the paper cup to be tested at its bottom position is re-drawn into it;

[0021] S4. The test stand moves upward, driving the lifting assembly at the bottom to lift the paper cup holder at the corresponding position, so that it moves upward synchronously with the hydraulic rod. The paper cups that have completed the test and are placed at the inner end of the paper cup holder also move upward synchronously with the paper cup holder. The liquid at different positions at the inner end will gradually come into contact with the bottom end port of the liquid injection cylinder. The liquid at the contact position is drawn into the liquid injection cylinder by the negative pressure until the bottom end of the paper cup comes into contact with the bottom end port of the liquid injection cylinder.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] In the sealing test equipment and method for paper cup production, liquid sealing test and gas sealing test are simultaneously performed on the paper cup to be tested by means of the provided liquid injection cylinder and gas injection cylinder. After the test is completed, negative pressure is formed at the inner end of the gas injection cylinder by resetting the negative pressure column, and the gas after the test is completed is recycled. At the same time, the position of the paper cup to be tested is adjusted in conjunction with the lifting component. Liquid at different positions on the inner end of the paper cup to be tested can evenly contact the bottom end of the liquid injection cylinder. The liquid injection cylinder in a negative pressure state is used to extract the test liquid at different positions therein, thereby reducing the cleaning work of the test personnel in the later stage and at the same time the test liquid can be recycled. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the detection process of the present invention;

[0026] Figure 3 It is a schematic diagram of the recycling process of the present invention;

[0027] Figure 4 It is a schematic structural diagram of the steering assembly of the present invention;

[0028] Figure 5 This is a schematic diagram of the bracket structure of the present invention;

[0029] Figure 6 For the present invention Figure 5 A local enlarged view of point A;

[0030] Figure 7 This is a schematic diagram of the test stand structure of the present invention.

[0031] The meaning of each number in the figure is:

[0032] 10. Steering assembly; 110. Base; 120. Arc guide rail; 130. Servo motor;

[0033] 20, bracket; 210, pad; 220, side frame; 221, slide; 230, paper cup holder; 231, slider;

[0034] 30. Test stand; 310. Hydraulic rod; 320. Lifting assembly; 330. Liquid injection cylinder; 340. Negative pressure column; 350. Gas injection cylinder; 360. Cover plate; 361. Corrugated ring. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying 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 should not be understood as limiting the present invention.

[0037] See also Figure 1 As shown, one of the objectives of the present invention is to provide a sealing test device for paper cup production, comprising a steering assembly 10 and a bracket 20 installed at the top of the steering assembly 10. Paper cup holders 230 for lifting and fixing paper cups are provided on both sides of the top of the bracket 20. The test frame 30 also includes a test frame 30. Negative pressure columns 340 are connected to both ends of the test frame 30. The bottom ends of the two negative pressure columns 340 are respectively provided with a liquid injection cylinder 330 for liquid injection and a gas injection cylinder 350 for gas injection. The liquid injection cylinder 330 and the gas injection cylinder 350 are respectively placed directly above the two paper cup holders 230. A hydraulic rod 310 is provided at the top of the test frame 30. The hydraulic rod 310 cooperates with the hydraulic rod 310 to drive the two negative pressure columns 340 to move up and down along the inner ends of the liquid injection cylinder 330 and the gas injection cylinder 350. In the downward state, the pressure at the inner ends of the liquid injection cylinder 330 and the gas injection cylinder 350 increases, and the contained liquid and gas are respectively injected into the paper cups to be tested at the corresponding positions.

[0038] A lifting assembly 320 is provided at the bottom end of the test frame 30 near the liquid injection cylinder 330. When the test frame 30 moves upward, the paper cup holder 230 is lifted to drive the paper cup containing liquid to move upward, so that the liquid at different positions in the cup gradually contacts the bottom end of the liquid injection cylinder 330 under negative pressure, and the liquid that has been tested is extracted by using the negative pressure liquid injection cylinder 330.

[0039] In specific use, during the sealing test of paper cups, first, the two paper cups to be tested are placed on the inner ends of the two paper cup holders 230, with their ports facing upwards, facing the bottom ends of the liquid injection cylinder 330 and the gas injection cylinder 350, respectively. The inner end of the liquid injection cylinder 330 is filled with liquid for sealing test, and the inner end of the gas injection cylinder 350 is filled with gas for sealing test. The positions of the liquid injection cylinder 330 and the gas injection cylinder 350 remain unchanged. Figure 2 As shown, the test stand 30 is synchronously moved downward by the hydraulic rod 310. At this time, the two negative pressure cylinders 340 extend into the inner ends of the liquid injection cylinder 330 and the gas injection cylinder 350 respectively, and increase the air pressure at the inner ends of the two ends, so that the liquid at the inner end of the liquid injection cylinder 330 is injected from the inside to the inside of the corresponding position of the paper cup to be tested. At the same time, under the pressure of the negative pressure cylinder 340, the bottom end port of the gas injection cylinder 350 discharges gas with a certain air pressure outward, so that it enters inward along the port of the corresponding position of the paper cup to be tested. , let it stand for a while, observe the two paper cups to be tested, and determine whether the two paper cups to be tested have leakage, bulging or cracking. If none of the above phenomena occur, the hydraulic rod 310 drives the test frame 30 to move upward, and simultaneously drives the two negative pressure cylinders 340 to move upward, so that the inner ends of the two paper cup holders 230 are both in a negative pressure state. During this process, the gas injection cylinder 350 in the negative pressure state draws air inward, and the gas that has been tested at the inner end of the paper cup to be tested at its bottom position is re-drawn into it;

[0040] However, since the fluidity of liquid is poorer than that of gas, the liquid injection cylinder 330 whose bottom end is not in contact with the gas cannot be used to draw in liquid. Therefore, when the test rack 30 moves upward, it will drive the lifting assembly 320 provided at the bottom end to lift the paper cup sleeve rack 230 at the corresponding position, so that it moves upward synchronously with the hydraulic rod 310. Figure 3 As shown, during this process, the paper cup that has completed the inspection and is placed at the inner end of the paper cup holder 230 also moves upward synchronously with the paper cup holder 230, and the liquid at different positions of the inner end thereof will gradually contact the bottom end port of the liquid injection cylinder 330. The liquid at the contact position is drawn into the liquid injection cylinder 330 by utilizing the negative pressure until the bottom end of the paper cup contacts the bottom end port of the liquid injection cylinder 330, thereby completing the extraction of the inspection liquid in the paper cup and reusing the inspected liquid, thereby reducing the waste of liquid resources and facilitating the subsequent replacement of the inspection method, thereby improving the inspection efficiency.

[0041] In addition, by Figure 4 As shown, the steering assembly 10 includes a base 110 and an arc-shaped guide rail 120. A servo motor 130 is provided at the top of the base 110. The top of the servo motor 130 is connected to the bottom of the bracket 20 to drive the bracket 20 to steer and adjust the positions of the two paper cup holders 230.

[0042] Depend on Figure 5As shown, a pad 210 is provided on both sides of the top of the bracket 20, and two paper cup holders 230 are respectively placed on the top of the two pads 210, and a plurality of side frames 220 are arranged in an array on the side of the top of the pad 210, and a sliding space is formed between each side frame 220 for the paper cup holder 230 to move up and down;

[0043] Depend on Figure 5 As shown, each side frame 220 is provided with a slide groove 221 on its side, and a column is provided at the inner end of the slide groove 221. A baffle is provided at the top of the column, and the cross-sectional dimension of the baffle is larger than that of the column. A plurality of sliders 231 are arranged in an array on the side of the bottom end of the paper cup holder 230. The sliders 231 extend into the slide grooves 221 at corresponding positions and are sleeved on the outside of the column to slide up and down along the inner end of the slide groove 221.

[0044] Depend on Figure 6 As shown, the lifting assembly 320 includes a downwardly inclined inclined plate, and the inclined plate is inclined toward the bottom end of the paper cup holder 230. An upwardly inclined hook plate is provided at the bottom end of the inclined plate. The hook plate and the inclined plate form a V-shaped structure, and the hook plate is made of elastic metal material.

[0045] In specific use, during the process of testing the sealing of paper cups, due to the various application scenarios in the actual use of paper cups, a single test work is difficult to adapt to the actual testing needs. Therefore, the paper cups to be tested are placed in different positions after completing the water test or gas test. Figure 7 As shown, the servo motor 130 cooperates with the pad 210 to drive the two paper cup holders 230 to adjust their positions along the arc guide rail 120. At this time, the paper cup to be tested that has completed the water test is directly below the gas injection cylinder 350, and the paper cup to be tested that has completed the gas test is directly below the liquid injection cylinder 330. At this time, the water test and gas test processes are repeated, so that the paper cup to be tested can undergo secondary testing under different processing conditions, thereby improving the adaptability of the testing work and improving the testing effect.

[0046] After the inspection is completed, the liquid and gas in the paper cup need to be recycled for a second time. At this time, the test frame 30 is driven upward by the hydraulic rod 310, and the two negative pressure cylinders 340 move upward synchronously with the test frame 30, causing the inner ends of the liquid injection cylinder 330 and the gas injection cylinder 350 to be in a negative pressure state. At the same time, the inclined plate and the hook plate form a V-shaped structure at the bottom end of the test frame 30. Since the hook plate is made of elastic metal, such as an iron sheet, when the hook plate follows the test frame 30 to move downward, its bottom end contacts the bottom end of the paper cup sleeve rack 230. At this time, the bottom end of the paper cup sleeve rack 230 is supported by the top of the pad 210 and cannot move downward. Therefore, the hook plate after contact will be subjected to the reaction force exerted by the bottom end of the paper cup sleeve rack 230, causing the hook plate to deflect toward the inclined plate, so that the angle of the V-shaped structure formed by the two becomes smaller, until the hook plate follows the test frame 30 and separates from the bottom end of the paper cup sleeve rack 230. At this time, the hook plate loses the reaction force and recovers its own deformation until the inspection is completed. The plate moves up synchronously with the test rack 30, and the top of the hook plate will contact the bottom surface of the paper cup holder 230. The gravity formed by the paper cup holder 230 and the paper cup filled with liquid is not enough to cause deformation of the hook plate. At this time, the hook plate will drive the paper cup holder 230 to move up, and drive the paper cup filled with liquid upward, so that the internal liquid gradually contacts the bottom end of the injection cylinder 330 until the bottom end of the injection cylinder 330 contacts the bottom of the paper cup. The liquid at the inner end of the paper cup is extracted by the injection cylinder 330 under negative pressure. At this time, the top of the slider 231 provided on the side of the paper cup sleeve rack 230 just contacts the baffle, so that the paper cup sleeve rack 230 cannot move further. The hook plate is subjected to the reaction force exerted by the bottom surface of the paper cup sleeve rack 230, causing it to deform downward. The angle of the V-shaped structure formed by the hook plate and the hypotenuse increases until the bottom end of the hook plate is separated from the bottom end of the paper cup sleeve rack 230. At this time, the paper cup sleeve rack 230 loses its support and moves downward to its initial position under the action of its own gravity along the sliding space formed by each side frame 220.

[0047] Furthermore, a plurality of exhaust pipes are provided at the bottom end of the gas injection cylinder 350 . The exhaust pipe arrays are distributed at the bottom end of the gas injection cylinder 350 and are all connected to the inner end of the gas injection cylinder 350 .

[0048] A cover plate 360 ​​is provided on the side of the test frame 30 close to the gas injection cylinder 350, and a corrugated ring 361 is provided at the bottom end of the cover plate 360. The corrugated ring 361 moves downward synchronously with the test frame 30 and is provided on the top position of the gas injection cylinder 350, so that the inner end of the gas injection cylinder 350 forms a sealed state.

[0049] During specific use, since it is necessary to ensure uniform gas inflow during the gas detection process to prevent single-channel gas discharge, which will cause excessive force on some areas inside the paper cup, directly causing damage to the contact area and affecting the detection results. At the same time, if the port of the gas injection cylinder 350 is in an open state, part of the gas will escape from the port after flowing in, resulting in uneven gas pressure each time, which will still affect the detection results. Therefore, multiple exhaust pipes are set to guide the gas evenly and guide the discharged gas to different areas of the inner end of the paper cup to be tested, so that the gas can flow into the paper cup evenly, forming a slow and effective pressurization test. At the same time, the corrugated ring 361 at the top moves down synchronously with the test frame 30 and is sleeved on the top position of the paper cup sleeve 230. Since the corrugated ring 361 is an elastic structure, it will shrink and deform after contacting the paper cup sleeve 230, so that the paper cup to be tested is in a sealed state, thereby avoiding gas escape and ensuring that the amount of gas flowing in during each detection process is constant, thereby improving the accuracy of the gas detection results.

[0050] A second object of the present invention is to provide a water purification method for a sealing test device for paper cup production, comprising the following steps:

[0051] S1. Place the two paper cups to be tested on the inner ends of the two paper cup holders 230, with their ports facing upwards, facing the bottom ends of the liquid injection cylinder 330 and the gas injection cylinder 350, respectively;

[0052] S2. The test stand 30 is synchronously moved downward by the hydraulic rod 310. At this time, the two negative pressure cylinders 340 extend into the inner ends of the liquid injection cylinder 330 and the gas injection cylinder 350, respectively, and increase the air pressure at these inner ends. This causes the liquid in the inner end of the liquid injection cylinder 330 to be injected from the inside outward into the inner end of the corresponding position of the test paper cup. At the same time, under the pressure of the negative pressure cylinder 340, the bottom end of the gas injection cylinder 350 discharges gas with a certain pressure outward, which enters the corresponding position of the test paper cup inward. The conditions of the two test paper cups are observed.

[0053] S3. The test stand 30 is moved upward by the hydraulic rod 310, and the two negative pressure cylinders 340 are simultaneously moved upward, so that the inner ends of the two paper cup holders 230 are both in a negative pressure state. The gas injection cylinder 350 in the negative pressure state draws air inward, and the gas that has been tested at the inner end of the paper cup to be tested at its bottom position is re-drawn into the inner end;

[0054] S4. The test rack 30 moves upward, driving the lifting assembly 320 at the bottom to lift the paper cup holder 230 at the corresponding position, so that it moves upward synchronously with the hydraulic rod 310. The paper cups that have completed the testing and are placed at the inner end of the paper cup holder 230 also move upward synchronously with the paper cup holder 230. The liquid at different positions at the inner end will gradually contact the bottom end port of the liquid injection cylinder 330. The liquid at the contact position will be drawn into the liquid injection cylinder 330 by the negative pressure until the bottom end of the paper cup contacts the bottom end port of the liquid injection cylinder 330.

[0055] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A sealing test device for paper cup production, comprising a steering assembly (10) and a bracket (20) mounted on the top of the steering assembly (10), wherein both sides of the top of the bracket (20) are provided with a paper cup holder (230) for lifting and fixing the paper cup, characterized in that: The test frame (30) is also provided with a negative pressure column (340) at both ends of the test frame (30), and a liquid injection cylinder (330) for liquid injection and a gas injection cylinder (350) for gas injection are respectively provided at the bottom ends of the two negative pressure columns (340), and the liquid injection cylinder (330) and the gas injection cylinder (350) are respectively placed directly above the two paper cup sleeve racks (230). A hydraulic rod (310) is provided at the top end of the test frame (30), and the hydraulic rod (310) cooperates with the test frame (30) to drive the two negative pressure columns (340) to move up and down along the inner ends of the liquid injection cylinder (330) and the inner ends of the gas injection cylinder (350). In the downward state, the pressure at the inner ends of the liquid injection cylinder (330) and the gas injection cylinder (350) increases, and the contained liquid and gas are respectively injected into the paper cups to be tested at corresponding positions; A lifting assembly (320) is provided on one side of the bottom end of the test frame (30) close to the liquid injection cylinder (330), and when the test frame (30) moves upward, the paper cup holder (230) is lifted to drive the paper cup containing liquid to move upward, so that the liquid at different positions in the cup gradually contacts the bottom end of the liquid injection cylinder (330) under negative pressure, and the liquid that has been tested is extracted by using the negative pressure liquid injection cylinder (330).

2. The sealing detection equipment for paper cup production according to claim 1, characterized in that: The steering assembly (10) comprises a base (110) and an arc-shaped guide rail (120). A servo motor (130) is provided at the top end of the base (110). The top end of the servo motor (130) is connected to the bottom end of the bracket (20) and is used to drive the bracket (20) to steer and coordinate with adjusting the positions of the two paper cup holders (230).

3. The sealing detection equipment for paper cup production according to claim 2, characterized in that: Pads (210) are provided on both sides of the top of the bracket (20), the two paper cup sleeve racks (230) are respectively placed at the top of the two pads (210), and a plurality of side racks (220) are arranged in an array on the side of the top of the pad (210), and a sliding space for the paper cup sleeve racks (230) to move up and down is formed between the side racks (220).

4. The sealing detection device for paper cup production according to claim 3, characterized in that: Each side frame (220) is provided with a slide groove (221) on its side, and a column is provided at the inner end of the slide groove (221), and a baffle is provided at the top end of the column, and the cross-sectional size of the baffle is larger than the cross-sectional size of the column. A plurality of sliders (231) are provided in an array on the side of the bottom end of the paper cup holder (230), and the sliders (231) extend into the slide groove (221) at the corresponding position and are sleeved on the outside of the column to slide up and down along the inner end of the slide groove (221).

5. The sealing detection device for paper cup production according to claim 4, characterized in that: The lifting assembly (320) comprises a downwardly inclined inclined plate, and the inclined plate is inclined towards a position close to the bottom end of the paper cup sleeve rack (230). An upwardly inclined hook plate is provided at the bottom end of the inclined plate, and the hook plate and the inclined plate form a V-shaped structure. The hook plate is made of an elastic metal material.

6. The sealing detection equipment for paper cup production according to claim 1, characterized in that: A plurality of exhaust pipes are provided at the bottom end of the gas injection cylinder (350), and each exhaust pipe array is distributed at the bottom end of the gas injection cylinder (350) and is kept in a conductive state with the inner end of the gas injection cylinder (350).

7. The sealing detection device for paper cup production according to claim 6, characterized in that: A cover plate (360) is sleeved on one side of the test stand (30) close to the gas injection cylinder (350), and a corrugated ring (361) is provided at the bottom end of the cover plate (360). The corrugated ring (361) moves downward synchronously with the test stand (30) and is sleeved on the top end of the gas injection cylinder (350), so as to form a sealed state at the inner end of the gas injection cylinder (350).

8. A method for using the sealing detection device for paper cup production according to claim 1, characterized in that: The method comprises the following steps: S1. Place the two paper cups to be tested on the inner ends of the two paper cup holders (230) respectively, with their ports facing upwards, facing the bottom ends of the liquid injection cylinder (330) and the gas injection cylinder (350), respectively; S2, the test frame (30) is driven to move downward synchronously by the hydraulic rod (310), at which time the two negative pressure cylinders (340) are respectively extended into the inner end of the liquid injection cylinder (330) and the inner end of the gas injection cylinder (350), and the air pressure at the inner ends of the two are increased, so that the liquid at the inner end of the liquid injection cylinder (330) is injected from the inside to the outside into the inner end of the paper cup to be tested at the corresponding position, and at the same time, under the pressure of the negative pressure cylinder (340), the bottom end port of the gas injection cylinder (350) discharges gas with a certain air pressure outward, so that it enters inward along the port of the paper cup to be tested at the corresponding position, and the conditions of the two paper cups to be tested are observed; S3, driving the test frame (30) upward by the hydraulic rod (310), and simultaneously driving the two negative pressure columns (340) upward, so that the inner ends of the two paper cup holders (230) are both in a negative pressure state, and the gas injection cylinder (350) in the negative pressure state draws air inward, and the gas that has completed the test work at the inner end of the paper cup to be tested at its bottom position is re-drawn into it; S4. The test rack (30) moves upward, driving the lifting assembly (320) provided at the bottom end to lift the paper cup holder (230) at the corresponding position, so that the paper cup holder (230) moves upward synchronously with the hydraulic rod (310). The paper cups that have completed the testing work and are placed at the inner end of the paper cup holder (230) also move upward synchronously with the paper cup holder (230). The liquid at different positions at the inner end will gradually contact the bottom end port of the liquid injection cylinder (330). The liquid at the contact position is drawn into the liquid injection cylinder (330) by the negative pressure until the bottom end of the paper cup contacts the bottom end port of the liquid injection cylinder (330).

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