Butyronitrile glove finished product water leakage testing device based on pressure sensing monitoring and testing method thereof

Abstract

The invention relates to the related technical field of water leakage testing, in particular to a water leakage testing device and method for a butyronitrile glove finished product based on pressure sensing monitoring, and the device comprises a cabinet body and a box body disposed in the cabinet body, and also comprises an inflation pipeline, a pressure sensor, a pressure sensor, and a controller. The air inflation pipeline is arranged above the box body and used for being connected with gloves to be tested, the air inflation pipeline can drive the gloves to enter the box body, a pressure sensor is arranged on the air inflation pipeline, and a vacuum pump used for conducting air exhaust treatment on the box body is further arranged in the cabinet body; during testing, the shifting rods are sequentially inserted into finger seams of the gloves, and then the pulling mechanism drives the shifting rods to shift hand parts on the gloves, so that the finger seams of the gloves can be enlarged, and the situation that leakage points in the finger seams of the gloves are squeezed due to expansion of the gloves, gas in the gloves cannot be exhausted, and the gloves are damaged is avoided. And inaccurate test results are caused.

Description

Technical Field

[0001] The present invention relates to the technical field of leak testing, and specifically to a leak testing device and a testing method for finished nitrile gloves based on pressure sensor monitoring. Background Technique

[0002] Nitrile gloves are disposable gloves made of nitrile rubber, which have advantages such as being thin, light, soft, having a high degree of fit, and a skin-like touch. They have particularly good elasticity, fit the hand better, and are very comfortable to use. Nitrile gloves rarely cause allergies, and at the same time have puncture resistance, antibacterial permeability, and chemical resistance, and are widely used in the field of medical protection. To prevent the penetration of harmful substances during use and protect the safety of users, it is crucial to conduct leak testing on nitrile gloves during production. Strict leak testing helps enterprises meet high-standard service industry regulations and more precise industrial production requirements, and enhance market competitiveness.

[0003] Nowadays, when testing gloves for leaks, the gloves are usually inflated, left standing for a period of time, and then the pressure inside the gloves before and after standing is measured. By comparing the two pressure values, it is determined whether the gloves are leaking air to achieve leak testing. This method is theoretically feasible, but in actual testing, if there are only tiny leakage points on the gloves, in order to detect an obvious pressure change, the standing time needs to be extended, which makes the testing efficiency low. In this regard, more gas is usually filled, causing the gloves to expand significantly. However, this may cause stress concentration and rupture at local positions on the gloves, especially at the connection between the finger roots and the palm of the gloves, thereby increasing the defective rate of the products. Summary of the Invention

[0004] The purpose of the present invention is to provide a leak testing device and a testing method for finished nitrile gloves based on pressure sensor monitoring to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the present invention provides the following technical solutions: A leak testing device for finished nitrile gloves based on pressure sensor monitoring, including a cabinet body and a box body arranged in the cabinet body, and further including: An inflation pipeline, arranged above the box body, for connecting the gloves to be tested. The inflation pipeline can drive the gloves into the box body, and a pressure sensor is arranged on the inflation pipeline. A vacuum pump for evacuating the box body is also arranged in the cabinet body; A sealing mechanism, arranged in the box body, for tightly sealing the connection between the gloves and the inflation pipeline after the gloves enter the box body; A lever is movably arranged in the box body, and the lever can be inserted into the finger gap of the glove and driven by a pulling mechanism arranged in the box body to perform a shifting action on the finger part of the glove.

[0006] As a further solution of the present invention: the inflation pipeline includes an inflation pipeline connected to an inflation pump and a vertical pipe sealed and rotatably connected to the inflation pipeline, and the vertical pipe is connected to an angle control mechanism capable of driving the glove to deflect; The pressure sensor is installed on the inflation pipe, and a control valve is also provided on the inflation pipe. The control valve is connected to a lifting mechanism provided in the cabinet. The bottom end of the vertical pipe is provided with a cylindrical head for gloves to be put on.

[0007] As a further solution of the present invention: a guide rail is fixedly provided in the cabinet, and the lifting mechanism includes an assembly plate slidably engaged on the guide rail and a first hydraulic cylinder installed in the cabinet, and a movable end of the first hydraulic cylinder is fixed to the assembly plate; Wherein, the assembly plate is connected to the control valve, and the angle adjustment mechanism is installed on the assembly plate.

[0008] As a further solution of the present invention: the angle adjustment mechanism includes a driving motor installed at the bottom of the assembly plate, the output shaft of the driving motor is connected to the vertical tube through a gear set, and the output shaft of the driving motor can drive the vertical tube to rotate through the gear set to change the direction of the glove; A through opening for gloves to enter is arranged on the top of the box body, and a sealing cover capable of sealing the through opening is arranged on the vertical pipe.

[0009] As a further solution of the present invention: the sealing mechanism includes a ring body arranged in the box body, the ring body is concentric with the vertical pipe, the outer wall of the ring body is provided with a guide groove, a plurality of fixed blocks connected to the inside of the box body are slidably embedded in the guide groove, and a plurality of groups of clamping units are provided on the ring body along its own axial direction.

[0010] As a further solution of the present invention: multiple groups of the clamping units are staggered, and a single group of the clamping units includes at least two clamping members equidistantly distributed along the circumference of the ring body, and the clamping members include an electric push rod installed radially along the ring body and a clamping block fixed to the movable end of the electric push rod and arranged in an arc shape.

[0011] As a further solution of the present invention: the pulling mechanism includes a second hydraulic cylinder installed in the box body and a cross arm connected to the movable end of the second hydraulic cylinder through two sets of relative sliding structures, and the shifting rod is movably arranged on the cross arm and can move along the length direction of the cross arm.

[0012] As a further solution of the present invention: a movable plate is slidably provided on the cross arm, the shifting rod is movably provided on the movable plate through a threaded driving member, and the threaded driving member can drive the shifting rod to move along the length direction of the movable plate.

[0013] As a further solution of the present invention: the relative sliding structure comprises a cross bar connected to the cross arm and a cylinder slidably sleeved on the cross bar and connected to the movable end of the second hydraulic cylinder, a connecting rod is provided between the cylinder and the movable plate, and the two ends of the connecting rod are respectively hinged to the movable plate and the cylinder; Wherein, a truncated cone located inside the cylinder is fixedly provided on the cross bar, and a cylindrical spring is sleeved on the outer circumference of the cross bar, and two ends of the cylindrical spring are respectively connected to the inner wall of the cylinder and the truncated cone.

[0014] A method for testing water leakage of finished nitrile gloves, using the testing device, comprises the following steps: Step 1: Put the glove to be tested on the inflation pipeline; Step 2: The inflation pipe and the glove are moved downward until the glove enters the box; Step 3: The sealing mechanism seals and tightens the mouth of the glove; Step 4: The vacuum pump evacuates the box, and the air pump inflates the gloves through the air pipeline, so that there is a pressure difference between the gloves and the box, and the pressure sensor obtains the pressure value in the air pipeline at this time; Step 5: The pulling mechanism works to cause the lever to be inserted into the finger gaps of the glove in sequence and to perform a pulling action on the finger portion of the glove; Step 6: The pressure sensor obtains the pressure value in the inflation pipeline again. If it is lower, the glove fails the water leakage test.

[0015] Compared with the prior art, the present invention has the following beneficial effects: When testing nitrile gloves, the gloves are placed in a box. The box is evacuated by a vacuum pump and the gloves are inflated by an air pump, forming a significant pressure difference. This pressure difference causes the gas to flow from the high-pressure area of ​​the glove to the low-pressure area of ​​the box. If there is a small leak in the glove, the gas will escape from this point, causing a pressure change. The pressure difference accelerates the gas flow, making small leaks easier to detect, and speeds up the detection of pressure changes, thereby shortening the test time and improving efficiency; Secondly, the box is evacuated by a vacuum pump to form a low-pressure environment inside the box, which can effectively isolate interference factors such as pressure fluctuations and temperature changes in the external environment. In this way, the pressure changes inside the glove during the test are more stable and reliable, and the test results are more accurate. In addition, during the test, the lever is inserted into the finger gaps of the glove in turn, and the pulling mechanism drives the lever to move the glove's hand area. Through this operation, the glove's finger gaps are expanded, thereby preventing the leakage points in the finger gaps from being squeezed and closed due to the expansion of the glove. This design ensures that the gas in the glove can be discharged smoothly, avoiding the problem of inaccurate test results caused by the inability of gas to escape, thereby improving the reliability and accuracy of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The present invention is a structural schematic diagram of an embodiment of a water leakage testing device for finished nitrile gloves based on pressure sensing monitoring.

[0017] Figure 2 This is a schematic structural diagram from another angle of an embodiment of a water leakage testing device for finished nitrile gloves based on pressure sensing monitoring.

[0018] Figure 3 This is a structural schematic diagram of another angle of an embodiment of a water leakage testing device for finished nitrile gloves based on pressure sensing monitoring.

[0019] Figure 4 This is a schematic diagram of the structure of the inflation pipeline in one embodiment of a water leakage testing device for finished nitrile gloves based on pressure sensing monitoring.

[0020] Figure 5 This is a schematic structural diagram of another angle of the inflation pipeline in one embodiment of a water leakage testing device for finished nitrile gloves based on pressure sensor monitoring.

[0021] Figure 6 for Figure 5 A magnified view of the structure at center.

[0022] Figure 7 This is a schematic diagram of the internal structure of a box in an embodiment of a water leakage testing device for finished nitrile gloves based on pressure sensing monitoring.

[0023] Figure 8 This is a schematic structural diagram of another angle inside the box of an embodiment of a water leakage testing device for finished nitrile gloves based on pressure sensor monitoring.

[0024] Figure 9 for Figure 8 A magnified view of the structure at point B.

[0025] Figure 10 This is a structural explosion diagram of the pulling mechanism in one embodiment of a water leakage testing device for finished nitrile gloves based on pressure sensing monitoring.

[0026] Figure 11Schematic structural diagram of a sealing structure in an embodiment of a water leakage test device for finished nitrile gloves based on pressure sensing monitoring.

[0027] Figure 12 Top view of a sealing mechanism in an embodiment of a water leakage test device for finished nitrile gloves based on pressure sensing monitoring.

[0028] In the figure: 1, cabinet; 2, box body; 3, vacuum pump; 4, control valve; 5, pressure sensor; 6, inflation pipeline; 7, riser pipe; 8, cylindrical head; 9, sealing cover; 10, drive motor; 11, gear set; 12, assembly plate; 13, first hydraulic cylinder; 14, sealing ring; 15, ring body; 16, fixed block; 17, electric push rod; 18, clamping block; 19, second hydraulic cylinder; 20, cylinder; 21, cross bar; 2101, frustum; 22, cylindrical spring; 23, cross arm; 24, movable plate; 25, lever; 26, connecting rod. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] In addition, an element in the present invention is referred to as being "fixed to" or "disposed on" another element, and it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manners.

[0031] Please refer to Figures 1-12 , in an embodiment of the present invention, a water leakage test device for finished nitrile gloves based on pressure sensing monitoring includes a cabinet 1 and a box body 2 disposed in the cabinet 1, and further includes: An inflation pipeline, disposed above the box body 2 and used to connect the glove to be tested. The inflation pipeline can drive the glove into the box body 2, and a pressure sensor 5 is disposed on the inflation pipeline. A vacuum pump 3 for evacuating the box body 2 is further disposed in the cabinet 1; A sealing mechanism, disposed in the box body 2 and used to tightly seal the connection between the glove and the inflation pipeline after the glove enters the box body 2; The lever 25 is movably disposed in the box body 2. The lever 25 can be inserted into the finger gaps of the glove and driven by the pulling mechanism disposed in the box body 2 to perform a shifting action on the finger portion of the glove.

[0032] It should be noted that, in the specific implementation, an air pump is also provided in the cabinet 1, and the air pump is connected to the air charging pipeline. During the test, the staff puts the gloves to be tested on the air charging pipeline, and then the air charging pipeline moves down, so that the gloves enter the box 2. Then, the vacuum pump 3 works and starts to extract the gas inside the box 2, so that the inside of the box 2 is in a negative pressure state. During this process, the gloves will expand. Then, the air pump inflates the gloves through the air charging pipeline, so that the gloves further expand, so that a significant pressure difference is formed between the inside of the gloves and the box 2. This pressure difference prompts the gas to flow from the high-pressure area inside the glove to the low-pressure area of ​​the box 2. If there is a small leak in the glove, the gas will flow through this leak, thereby generating a pressure change. Due to the existence of the pressure difference, the speed of gas flow will be accelerated, and the pressure change will be more obvious, making it easier to test small leaks, and because the pressure difference accelerates the flow of gas, the pressure change will be tested faster. This means that the test process can be completed in a shorter time, thereby improving the test efficiency. Secondly, the vacuum pump 3 evacuates the box 2, so that a low-pressure environment can be formed inside the box 2, which can effectively isolate interference factors such as pressure fluctuations and temperature changes in the external environment. In this way, the pressure changes inside the glove during the test are more stable and reliable, and the test results are more accurate.

[0033] Specifically, whenever the vacuum pump 3 completes evacuating the box 2 and the air pump completes inflating the glove through the air charging pipeline, the pressure sensor 5 will record the pressure data at this time. If there is a leak on the glove, the gas in the glove will escape into the box 2 under the action of the pressure difference, so that the pressure data monitored by the pressure sensor 5 will drop significantly. If there is no leak on the glove, the pressure difference between the glove and the box 2 can be maintained, and the pressure data monitored by the pressure sensor 5 will not change. It should also be noted that during the test, the lever 25 is inserted into the finger gaps of the glove in sequence, and then the pulling mechanism drives the lever 25 to move the hand part of the glove, so that the finger gaps of the glove can be enlarged, thereby preventing the leakage points existing in the finger gaps of the glove from being squeezed due to the expansion of the glove, making it impossible for the gas in the glove to be discharged, and causing the problem of inaccurate test results.

[0034] It should be emphasized that, since the glove is in an expanded state, the lever 25 will rub against the glove when it is inserted into the finger gap and when the finger part of the glove is moved. In order to avoid the problem that the glove is broken due to friction, and the test cannot be continued normally, the lever 25 is polished and has a smooth surface with a low friction coefficient.

[0035] Please refer again Figure 6 and Figure 7 The inflation pipeline includes an inflation pipe 6 connected to an inflation pump and a vertical pipe 7 sealed and rotatably connected to the inflation pipe 6, and the vertical pipe 7 is connected to an angle control mechanism capable of driving the glove to deflect; the pressure sensor 5 is installed on the inflation pipe 6, and the inflation pipe 6 is also provided with a control valve 4, and the control valve 4 is connected to a lifting mechanism arranged in the cabinet 1, and the bottom end of the vertical pipe 7 is provided with a cylindrical head 8 for the glove to be put on.

[0036] The control valve 4 may be a ball valve; During the test, the glove is put on the cylindrical head 8, and then the lifting mechanism drives the inflation pipe 6 and the vertical pipe 7 to move downward until the glove enters the box 2. The cylindrical head 8 is at the same height as the sealing mechanism. The sealing mechanism will apply pressure to the cylindrical head 8 to ensure the sealing of the connection between the glove and the cylindrical head 8, so as to avoid the gas in the glove escaping through the connection during the test, resulting in inaccurate test results.

[0037] Please refer again Figure 4 and Figure 5 A guide rail is fixedly provided in the cabinet 1, and the lifting mechanism includes an assembly plate 12 slidably engaged on the guide rail and a first hydraulic cylinder 13 installed in the cabinet 1, and the movable end of the first hydraulic cylinder 13 is fixed to the assembly plate 12; the assembly plate 12 is connected to the control valve 4, and the angle adjustment mechanism is installed on the assembly plate 12.

[0038] The angle control mechanism includes a drive motor 10 installed at the bottom of the assembly plate 12, and the output shaft of the drive motor 10 is connected to the vertical pipe 7 through a gear set 11. The output shaft of the drive motor 10 can drive the vertical pipe 7 to rotate through the gear set 11 to change the direction of the glove; a through hole for gloves to enter is provided at the top of the box body 2, and a sealing cover 9 capable of sealing the through hole is provided on the vertical pipe 7.

[0039] In detail, the gear set 11 includes a first gear fixedly mounted on the end of the output shaft of the driving motor 10 and a second gear fixedly mounted on the standpipe 7, and the first gear meshes with the second gear; During operation, after the glove is put on the cylindrical head 8, the first hydraulic cylinder 13 works to drive the assembly plate 12 to move downward, and accordingly, the glove enters the box body 2 until the sealing cover 9 reaches the opening at the top of the box body 2 to seal the opening; Specifically, a sealing ring 14 adapted to the sealing cover 9 is provided in the through port. Under the pressure of the first hydraulic cylinder 13, the sealing cover 9 will fit tightly with the sealing ring 14 to ensure the sealing performance. Of course, sealing gaskets are provided on both the sealing cover 9 and the sealing ring 14. Whenever the vacuum pump 3 completes evacuating the box body 2 and the air pump completes inflating the gloves through the air charging pipeline, in order to ensure that the lever 25 can be accurately inserted into the finger gaps of the gloves, so as to move the fingers of the gloves and expand the finger gaps of the gloves to avoid missed test points, the drive motor 10 works, and its output shaft can drive the vertical pipe 7 to rotate through the gear set 11 to adjust the direction of the gloves. In this regard, in order to facilitate the control of the positional relationship between the lever 25 and the gloves, during the actual test, a high-definition camera can be set in the box body 2 to monitor the position of the gloves to ensure that the lever 25 can be smoothly and accurately inserted into the finger gaps of the gloves.

[0040] It should be emphasized that the sealing ring 14 is rotatably installed in the through opening. Since the reliability of the seal needs to be ensured, during testing, the first hydraulic cylinder 13 will cause the sealing cover 9 to apply a certain pressure to the sealing ring 14. In order to prevent the riser 7 from being difficult to rotate smoothly due to the pressure between the sealing cover 9 and the sealing ring 14, the sealing ring 14 is rotatably arranged in the through opening.

[0041] Please refer again Figure 8 , Figure 11 as well as Figure 12 The sealing mechanism comprises a ring body 15 disposed in the housing 2, the ring body 15 is concentric with the riser 7, a guide groove is disposed on the outer wall of the ring body 15, a plurality of fixed blocks 16 connected to the interior of the housing 2 are slidably engaged in the guide groove, and a plurality of groups of clamping units are disposed along the axial direction of the ring body 15. The plurality of groups of clamping units are staggered, and a single group of the clamping units comprises at least two clamping members equidistantly distributed along the circumference of the ring body 15, and the clamping members comprise an electric push rod 17 radially mounted along the ring body 15 and a clamping block 18 fixed to the movable end of the electric push rod 17 and disposed in an arc shape.

[0042] Furthermore, during operation, after the glove enters the box body 2, the cylindrical head 8 is located exactly at the center of the ring body 15. At this time, the electric push rod 17 drives the clamping block 18 to move closer to the cylindrical head 8 until the clamping block 18 exerts a certain pressure on the cylindrical head 8. Therefore, the glove part sleeved on the outer wall of the cylindrical head 8 is pressed tightly, ensuring the sealing performance at the connection between the glove and the cylindrical head 8 and preventing the gas inside the glove from escaping during the test, which may lead to inaccurate test results. Since the clamping block 18 exerts pressure on the cylindrical head 8, when the riser pipe 7 rotates, the ring body 15 will rotate, avoiding the problem of distortion of the part of the glove sleeved on the cylindrical head 8 caused by the fixed setting of the ring body 15, which may affect the sealing performance. During specific implementation, balls are arranged in the guide groove on the outer wall of the ring body 15 to reduce the friction between the ring body 15 and the fixed block 16. It should be noted that before the start of the test work, when the staff sleeves the glove on the cylindrical head 8, it is necessary to check whether the inner wall of the glove is completely attached to the outer wall of the cylindrical head 8, and gaps between the two should be avoided. If there are gaps, it will be difficult to ensure the sealing performance at the connection between the glove and the cylindrical head 8 when the clamping block 18 exerts pressure subsequently.

[0043] For the multi-group clamping units arranged in a staggered manner, taking Figure 12 as an example, that is, the structures of the multi-group clamping units are the same, but the placement angles are different. The connecting lines between the centers of the clamping blocks 18 in the multi-group clamping units and the center of the ring body 15 do not coincide. If only one group of clamping units is used, after the multiple clamping blocks 18 are retracted, the acting force of the connection between two adjacent clamping blocks 18 on the cylindrical head 8 is relatively weak. In this regard, in this application, by arranging the multi-group clamping units in a staggered manner, after the cylindrical head 8 is clamped, the clamping force received by the cylindrical head 8 can be made more uniform, thereby effectively ensuring the sealed connection between the glove and the cylindrical head 8.

[0044] Please refer to Figure 8 again, Figure 9 and Figure 10 , the pulling mechanism includes a second hydraulic cylinder 19 installed in the box body 2 and a cross arm 23 connected to the movable end of the second hydraulic cylinder 19 through two sets of relative sliding structures. The lever 25 is movably arranged on the cross arm 23 and can move along the length direction of the cross arm 23. A movable plate 24 is slidably arranged on the cross arm 23, and the lever 25 is movably arranged on the movable plate 24 through a threaded driving member, and the threaded driving member can drive the lever 25 to move along the length direction of the movable plate 24.

[0045] Furthermore, the threaded driving member includes a screw rod rotatably mounted on the movable plate 24 and a connecting block provided on the screw rod and slidably connected to the movable plate 24. The connecting block is threadedly connected to the screw rod, and the lever 25 is fixed to the connecting block. When working, the screw rod is driven by a servo motor to cause the connecting block to threadably engage with the screw rod, thereby adjusting the position of the lever 25, and then cooperating with the rotation of the vertical tube 7 to ensure that the lever 25 is aligned with the finger gap of the glove. The threaded engagement driving method has high precision, thereby facilitating the control of the adjustment precision of the lever 25.

[0046] The relative sliding structure includes a cross bar 21 connected to the cross arm 23 and a cylinder 20 slidably mounted on the cross bar 21 and connected to the movable end of the second hydraulic cylinder 19, a connecting rod 26 is provided between the cylinder 20 and the movable plate 24, and the two ends of the connecting rod 26 are respectively hinged to the movable plate 24 and the cylinder 20; a table 2101 located inside the cylinder 20 is also fixedly provided on the cross bar 21, and a cylindrical spring 22 is sleeved on the outer periphery of the cross bar 21, and the two ends of the cylindrical spring 22 are respectively connected to the inner wall of the cylinder 20 and the table 2101.

[0047] During operation, the movable end of the second hydraulic cylinder 19 retracts, so that the cylinder 20, the cross bar 21, the cross arm 23 and the movable plate 24 move until the lever 25 is inserted into the finger gap of the glove. Then, the end of the cross bar 21 away from the cross arm 23 abuts against the inner wall of the box body 2. As the movable end of the second hydraulic cylinder 19 continues to retract, the cylinder 20 will slide on the cross bar 21, and the cylindrical spring 22 will be gradually compressed. At the same time, the cylinder 20 pulls the movable plate 24 on the cross arm 23 toward the cross bar 21 through the connecting rod 26. Then, the lever 25 will translate and move the finger part of the glove, so that the finger gap of the glove becomes larger, thereby avoiding the leakage point existing in the finger gap of the glove due to the expansion of the glove from being squeezed, so that the gas in the glove cannot be discharged, causing the problem of inaccurate test results.

[0048] Specifically, as the finger parts on the glove are moved, the overall shape of the glove will change. At this time, the pressure data monitored by the pressure sensor 5 may fluctuate. It should be noted that this data fluctuation is not used as a reference. During the test, the lever 25 should be inserted into each finger gap one by one and perform the moving action. After the finger gap is expanded, the expanded state should be maintained for a period of time. Then the active end of the second hydraulic cylinder 19 is extended and each component is reset, that is, the glove will return to its original shape. At this time, the pressure sensor 5 monitors the data again. If the pressure value is reduced, it indicates that there is a leak on the glove and the water leakage test fails.

[0049] It is also necessary to explain that, from the above description, it can be seen that there are a second hydraulic cylinder 19 and a servo motor in the box body 2. Because during the test, the vacuum pump 3 will evacuate the box body 2 to form an obvious pressure difference between the glove and the box body 2. The working pair of the second hydraulic cylinder 19 and the servo motor may cause pressure fluctuations in the box body 2 due to heat dissipation, which may further cause corresponding pressure fluctuations in the glove, but this fluctuation is negligible. In actual testing, the second hydraulic cylinder 19 and the servo motor can also be equipped with their own sealing covers (the sealing covers are connected to the outside world) to isolate them from the negative pressure environment in the box body 2.

[0050] As another embodiment of the present invention, a method for testing water leakage of finished nitrile gloves is also proposed, using the testing device, comprising the following steps: Step 1: Put the glove to be tested on the inflation pipeline; Step 2: The inflation pipe and the glove are moved downward until the glove enters the interior of the box 2; Step 3: The sealing mechanism seals and tightens the mouth of the glove; Step 4: The vacuum pump 3 evacuates the box 2, and the air pump inflates the glove through the air inflating pipeline, so that there is a pressure difference between the glove and the box 2, and the pressure sensor 5 obtains the pressure value in the air inflating pipeline at this time; Step 5: The pulling mechanism works to cause the lever 25 to be inserted into the finger gaps of the glove in sequence and to perform a pulling action on the finger portion of the glove; Step 6: The pressure sensor 5 obtains the pressure value in the inflation pipeline again. If it decreases, the glove fails the water leakage test.

[0051] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0052] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A water leakage test device for finished nitrile gloves based on pressure sensing monitoring, comprising a cabinet and a box disposed in the cabinet; It is characterized in that Also includes: An air-filling pipeline is arranged above the box and is used to connect the gloves to be tested. The air-filling pipeline can drive the gloves into the box, and a pressure sensor is arranged on the air-filling pipeline. The cabinet is also provided with a vacuum pump for evacuating the box; A sealing mechanism is provided in the box body, and is used to seal and tighten the connection between the glove and the inflation pipeline after the glove enters the box body; A lever is movably arranged in the box body, and the lever can be inserted into the finger gap of the glove and driven by a pulling mechanism arranged in the box body to perform a shifting action on the finger part of the glove.

2. A water leakage testing device for finished nitrile gloves based on pressure sensing monitoring according to claim 1, characterized in that: The inflation pipeline includes an inflation pipeline connected to an inflation pump and a vertical pipe connected to the inflation pipeline in a sealed and rotatable manner, and the vertical pipe is connected to an angle control mechanism capable of driving the glove to deflect; The pressure sensor is installed on the inflation pipe, and a control valve is also provided on the inflation pipe. The control valve is connected to a lifting mechanism provided in the cabinet. The bottom end of the vertical pipe is provided with a cylindrical head for gloves to be put on.

3. A water leakage testing device for finished nitrile gloves based on pressure sensing monitoring according to claim 2, characterized in that: A guide rail is fixedly arranged in the cabinet, and the lifting mechanism comprises an assembly plate slidably engaged with the guide rail and a first hydraulic cylinder installed in the cabinet, wherein the movable end of the first hydraulic cylinder is fixed to the assembly plate; Wherein, the assembly plate is connected to the control valve, and the angle adjustment mechanism is installed on the assembly plate.

4. A water leakage testing device for finished nitrile gloves based on pressure sensing monitoring according to claim 3, characterized in that: The angle adjustment mechanism includes a driving motor installed at the bottom of the assembly plate, the output shaft of the driving motor is connected to the vertical tube through a gear set, and the output shaft of the driving motor can drive the vertical tube to rotate through the gear set to change the direction of the glove; A through opening for gloves to enter is arranged on the top of the box body, and a sealing cover capable of sealing the through opening is arranged on the vertical pipe.

5. A water leakage testing device for finished nitrile gloves based on pressure sensing monitoring according to claim 4, characterized in that: The sealing mechanism includes a ring body arranged in the box body, the ring body is concentric with the vertical pipe, the outer wall of the ring body is provided with a guide groove, a plurality of fixed blocks connected to the inside of the box body are slidably embedded in the guide groove, and a plurality of groups of clamping units are provided on the ring body along its own axial direction.

6. A water leakage testing device for finished nitrile gloves based on pressure sensing monitoring according to claim 5, characterized in that: The multiple groups of clamping units are staggered, and a single group of clamping units includes at least two clamping members equidistantly distributed along the circumference of the ring body. The clamping members include an electric push rod installed radially along the ring body and a clamping block fixed to the movable end of the electric push rod and arranged in an arc shape.

7. The water leakage testing device for finished nitrile gloves based on pressure sensing monitoring according to claim 1, characterized in that: The pulling mechanism includes a second hydraulic cylinder installed in the box body and a cross arm connected to the movable end of the second hydraulic cylinder through two sets of relative sliding structures. The shifting rod is movably arranged on the cross arm and can move along the length direction of the cross arm.

8. The water leakage testing device for finished nitrile gloves based on pressure sensing monitoring according to claim 7, characterized in that: A movable plate is slidably provided on the cross arm, and the shifting rod is movably provided on the movable plate through a threaded driving member, and the threaded driving member can drive the shifting rod to move along the length direction of the movable plate.

9. The water leakage testing device for finished nitrile gloves based on pressure sensing monitoring according to claim 8, characterized in that: The relative sliding structure comprises a cross bar connected to the cross arm and a cylinder slidably sleeved on the cross bar and connected to the movable end of the second hydraulic cylinder, a connecting rod is provided between the cylinder and the movable plate, and two ends of the connecting rod are respectively hinged to the movable plate and the cylinder; Wherein, a truncated cone located inside the cylinder is fixedly provided on the cross bar, and a cylindrical spring is sleeved on the outer circumference of the cross bar, and two ends of the cylindrical spring are respectively connected to the inner wall of the cylinder and the truncated cone.

10. A method for testing water leakage of finished nitrile gloves, using the testing device as claimed in claim 1, characterized in that: The following steps are involved: Step 1: Put the glove to be tested on the inflation pipeline; Step 2: The inflation pipe and the glove are moved downward until the glove enters the box; Step 3: The sealing mechanism seals and tightens the mouth of the glove; Step 4: The vacuum pump evacuates the box, and the air pump inflates the gloves through the air pipeline, so that there is a pressure difference between the gloves and the box, and the pressure sensor obtains the pressure value in the air pipeline at this time; Step 5: The pulling mechanism works to cause the lever to be inserted into the finger gaps of the glove in sequence and to perform a pulling action on the finger portion of the glove; Step 6: The pressure sensor obtains the pressure value in the inflation pipeline again. If it is lower, the glove fails the water leakage test.

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