A sealing detection device and detection method for large-volume injection

Abstract

The present invention relates to the technical field of injection seal detection, and proposes a seal detection device and detection method for large-capacity injections, including: a first roller, having two, the two first rollers move relative to each other; a second roller, located beside the first roller, having two, the two second rollers move relative to each other, a receiving area between the two first rollers and between the two second rollers, the receiving area is used to place an infusion bag, the first roller and the second roller are used to abut against the bag body of the infusion bag, the axial direction of the first roller is perpendicular to the axial direction of the interface of the infusion bag, and the first roller and the second roller are staggered to drive the interface of the infusion bag to swing. Through the above technical solution, the problem that the existing method of squeezing the bag body cannot effectively realize the seal detection and there is a problem of missed detection is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of injection sealing detection, and in particular to a sealing detection device and a detection method for large-volume injection. Background Art

[0002] After large-volume injections are filled and sterilized, the infusion bags also need to be tested for sealing.

[0003] The infusion bag includes a bag body and an interface. The interface is a sealed connection position and is the main leak detection position. However, the bag body itself also needs to be tested for sealing. During the detection, the existing detection device uses two pressure plates to clamp the bag body of the infusion bag to increase the internal pressure. If there is a leak, the solution inside the infusion bag will be sprayed out. However, this single pressurization detection cannot achieve comprehensive detection. Some small leaks on the bag body or at the connection between the interface and the bag body are prone to unidirectional leakage, such as liquid flowing out of the infusion bag or air intake from the outside of the infusion bag. There is a problem that the infusion bag may be closed by unidirectional pressure in the non-leakage direction, or it may directly adhere to other surfaces after being subjected to high pressure, resulting in the inability to effectively detect the sealing. During long-term transportation and storage, it leaks slowly or gradually expands and leaks, causing solution contamination.

[0004] The existing method of squeezing the bag body cannot effectively realize the sealing detection, and there is a problem of missed detection that needs to be solved. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a sealing detection device and method for large-volume injections in response to the above-mentioned technical deficiencies, which solves the problem that the existing method of squeezing the bag body cannot effectively realize sealing detection and there is a problem of missed detection.

[0006] The technical solution adopted by the present invention is to provide a sealing detection device for large-volume injections, comprising:

[0007] There are two first pressing rollers, and the two first pressing rollers move relatively;

[0008] The second pressing roller is located beside the first pressing roller, and has two of them. The two second pressing rollers move relative to each other. There is a accommodating area between the two first pressing rollers and between the two second pressing rollers. The accommodating area is used to place the infusion bag. The first pressing roller and the second pressing roller are used to abut against the bag body of the infusion bag. The axial direction of the first pressing roller is perpendicular to the axial direction of the interface of the infusion bag. After the first pressing roller and the second pressing roller are staggered, the interface of the infusion bag is driven to swing.

[0009] Further optimization of this technical solution also includes:

[0010] There are two sealing covers, which move relative to each other. After the two sealing covers abut against each other, a closed space is formed inside. The interface of the infusion bag is located between the two sealing covers, and the two sealing covers are clamped on the bag body of the infusion bag on one side close to the infusion bag;

[0011] A boosting pipe is connected to an external boosting device, is arranged on one of the sealing covers, is connected to the enclosed space, and is used to increase the pressure of the enclosed space.

[0012] To further optimize the technical solution, a testing portion is provided on one side of the sealing cover close to the interface of the infusion bag, and the interface of the infusion bag abuts against the testing portion after being swung.

[0013] Further optimization of this technical solution also includes:

[0014] A negative pressure tube is connected to an external negative pressure device, is arranged on one of the sealing covers, and is connected to the enclosed space to reduce the pressure in the enclosed space.

[0015] Further optimization of this technical solution also includes:

[0016] The third pressure roller has two parts, and the two third pressure rollers move relative to each other. The accommodating area is located between the two third pressure rollers. The third pressure roller is used to abut against the bag body of the infusion bag. The third pressure roller is located between the first pressure roller and the second pressure roller.

[0017] Further optimization of this technical solution also includes:

[0018] Workbench;

[0019] There are several movable racks, and the movable racks are movably arranged on the workbench. The first pressing roller and / or the second pressing roller and / or the third pressing roller are rotatably arranged on the movable racks and move with the movable racks.

[0020] A method for detecting the sealing performance of a large-volume injection is further proposed, wherein the sealing performance of an infusion bag is detected by using the device for detecting the sealing performance of a large-volume injection, and the method is characterized in that the method comprises the following steps:

[0021] The first step is to position the infusion bag, place the infusion bag in the accommodation area, and position the interface of the infusion bag between the two sealing covers. The two second pressing rollers clamp the bag body of the infusion bag and keep it still, and the two first pressing rollers clamp the side of the bag body of the infusion bag close to the interface.

[0022] The second step is to conduct a pressurized drop test on the infusion bag. The two first pressing rollers and the two second pressing rollers clamp the bag body of the infusion bag. The bag body stores a solution, and the inside of the bag body is pressurized. When the seal is insufficient, leakage will occur. The two first pressing rollers move back and forth synchronously in the same direction, so that one side of the interface of the infusion bag forms a reciprocating swing. When the interface swings, it hits the test part of the sealing cover to conduct a drop test.

[0023] The third step is to perform a pressurization and decompression test. The two sealing covers clamp the bag body of the infusion bag, part of the solution in the bag body is located in the closed space, and the interface is located in the closed space inside the two sealing covers. The closed space is pressurized by the pressurization pipe, and the sealing is tested by pressurizing the outside of the interface; after stopping the pressurization, the closed space is negatively pressurized by the negative pressure pipe, and the sealing is tested by forming a negative pressure outside the interface. Finally, the pressure inside and outside the closed space is balanced, and the two sealing covers are separated from each other.

[0024] The fourth step is to perform a surface test on the bag body. Initially, the two third pressure rollers are away from the bag body of the infusion bag, the two first pressure rollers and the two second pressure rollers clamp the bag body of the infusion bag and remain stationary, then the two second pressure rollers clamp the middle part of the bag body of the infusion bag, and the two third pressure rollers move back and forth synchronously in the same direction to bend the bag body of the infusion bag, perform a bending pressure test, and finally complete the sealing test.

[0025] The beneficial effects of the present invention are:

[0026] 1. The first pressing roller and the second pressing roller clamp the bag body of the infusion bag from two places, and can perform pressure test on the sealing. Two clamping and pressurizing positions are set, and the clamping and pressurizing can be performed separately to avoid squeezing the bag body so that it cannot or cannot be effectively tested for leakproofness.

[0027] 2. The first pressing roller is close to the interface of the infusion bag. The two first pressing rollers move back and forth synchronously, clamping one side of the interface to make the interface swing back and forth. The activity of the interface is enhanced by swinging, which is conducive to exposing hidden tiny leaks or unstable seals, achieving more effective sealing detection, and avoiding leakage in the later transportation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the present invention;

[0029] Figure 2 It is a front view structural schematic diagram of the present invention (without the workbench);

[0030] Figure 3 This is a schematic diagram of the structure of the interface of the present invention being located in a confined space;

[0031] Figure 4It is a schematic diagram of the structure of the infusion bag with staggered bending of the pressing rollers of the present invention;

[0032] Explanation of the markings in the figure: 1. Workbench; 101. Mobile frame; 102. Linear drive unit; 201. First pressure roller; 202. Second pressure roller; 203. Third pressure roller; 204. Accommodation area; 3. Sealing cover; 301. Enclosed space; 302. Booster pipe; 303. Negative pressure pipe; 304. Testing section; 4. Infusion bag; 401. Interface; 402. Bag body. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0034] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0035] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0037] like Figure 1-4 As shown, a sealing detection device for large-volume injections includes: a first pressing roller 201, having two, the two first pressing rollers 201 move relative to each other; a second pressing roller 202, located beside the first pressing roller 201, having two, the two second pressing rollers 202 move relative to each other, between the two first pressing rollers 201 and between the two second pressing rollers 202 is a receiving area 204, the receiving area 204 is used to place an infusion bag 4, the first pressing roller 201 and the second pressing roller 202 are used to abut against the bag body 402 of the infusion bag 4, the axial direction of the first pressing roller 201 is perpendicular to the axial direction of the interface 401 of the infusion bag 4, and after the first pressing roller 201 and the second pressing roller 202 are staggered, the interface 401 of the infusion bag 4 is driven to swing.

[0038] When in use, taking the two first rollers 201 as an example of being relatively distributed up and down, they can be lifted and lowered on the workbench 1, and the first roller 201 and the second roller 202 can be independently lifted and lowered by the linear drive unit 102 such as the cylinder drive assembly. The infusion bag 4 includes a bag body 402 and an interface 401 sealed and connected to the head of the bag body 402, and the interface 401 is in a sealed state. Taking the example of the interface 401 being close to the first roller 201 after the infusion bag 4 is placed in the accommodating area 204, the two second rollers 202 clamp the tail or middle of the bag body 402 without falling off, or completely clamp it, so that the bag body 402 is pressurized inside, and the bag body 402 is in a relatively expanded and tight state, and then the two first rollers 201 clamp one side of the head of the bag body 402 from the upper and lower sides, and then move up and down synchronously, driving the head of the bag body 402, that is, the interface 401, to swing up and down, and improve the activity by swinging to perform leak detection. The first roller 201 can pressurize the infusion bag 4 or just push it to abut.

[0039] The first pressure roller 201 and the second pressure roller 202 can also rotate to perform a pressure test on the bag body 402 of the infusion bag 4. For example, the two first pressure rollers 201 clamp the bag body 402 to increase the internal pressure, and the second pressure rollers 202 are away from the bag body 402. Then they are switched, and the two second pressure rollers 202 clamp the bag body 402 to increase the internal pressure, and the first pressure rollers 201 are away from the bag body 402. Rotating the positions can avoid the position where the pressure rollers are clamped on the bag body 402 and cannot be effectively leak-proof detected.

[0040] Both the first pressing roller 201 and the second pressing roller 202 can be rubber rollers with deformation capability, which cause little damage to the infusion bag 4 and can clamp and pressurize the infusion bag 4 over a larger area through deformation and fitting.

[0041] Furthermore, it also includes: a sealing cover 3, which has two sealing covers 3. The two sealing covers 3 move relative to each other. After the two sealing covers 3 abut against each other, a closed space 301 is formed inside. The interface 401 of the infusion bag 4 is located between the two sealing covers 3. The two sealing covers 3 are clamped on the bag body 402 of the infusion bag 4 on one side close to the infusion bag 4; a boosting pipe 302, which is connected to an external boosting device, is arranged on one of the sealing covers 3, is connected to the closed space 301, and is used to pressurize the closed space 301.

[0042] When in use, the sealing cover 3 is located beside the first pressing roller 201. Figure 3As shown, after the two sealing covers 3 move toward the middle and abut against each other, a closed structure is formed, the interior is a closed space 301, a part of the head of the bag body 402 and the interface 401 are wrapped inside, and the external boosting device is connected to the closed space 301 through the boosting pipe 302, and the closed space 301 is pressurized to perform a pressure test. The part of the bag body 402 located in the closed space 301 can be in a taut state, and the sealing cover 3 can be abutted against the head of the bag body 402 when the first roller 201 or the second roller 202 presses and pressurizes the bag body 402, so that a part of the liquid is retained in the part of the bag body 402 in the closed space 301, which is in a relatively taut state. If leakage occurs, a small amount of liquid will be sprayed out, which can reduce the leakage of the solution and facilitate later processing; at the same time, the head of the bag body 402 is in a taut state, which is conducive to reducing the possibility of leakage at the connection of the interface 401 due to external pressure after the external instantaneous boost, and the situation that the leakage is directly attached and closed due to external pressure cannot be effectively detected.

[0043] The external pressurizing device can be liquid pressurizing or gas pressurizing, which is a prior art. When there is a seal leakage, it can be observed through the leakage phenomenon or the expansion of the bag body 402.

[0044] The sealing cover 3 may be a semi-cylindrical or hemispherical structure, and two sealing covers 3 may be butted up and down to form a circular tube or a sphere.

[0045] Furthermore, a testing portion 304 is provided on one side of the sealing cover 3 close to the interface 401 of the infusion bag 4 , and the interface 401 of the infusion bag 4 abuts against the testing portion 304 after being swung.

[0046] When in use, the side wall of the sealing cover 3 close to the interface 401 can be the testing part 304. When the interface 401 swings up and down, it abuts and collides with the inner wall of the sealing cover 3 to perform a drop test, which can expose hidden unstable connections and improve sealing safety.

[0047] The two sealing covers 3 can adjust the relative distance with the interface 401 by moving so that the interface 401 can effectively impact the test part 304. The impact is not a violent test. By adjusting the lifting speed of the first pressure roller 201 and controlling the expansion and tightness of the bag body 402, the pressure of the interface 401 impacting the test part 304 can be changed, and a slight impact is sufficient.

[0048] Furthermore, it also includes: a negative pressure pipe 303, which is connected to an external negative pressure device, is arranged on one of the sealing covers 3, and is connected to the enclosed space 301, so as to reduce the pressure of the enclosed space 301.

[0049] When in use, the external negative pressure equipment can put the enclosed space 301 in a negative pressure state, and perform a sealing test on the connection of the interface 401. By changing the high pressure and negative pressure in the enclosed space 301, sealing tests can be performed in both the outside-to-inside and inside-to-outside directions, and the high pressure and negative pressure can be converted multiple times to improve the effectiveness of the detection.

[0050] The boosting pipe and the negative pressure pipe 303 can be arranged on one sealing cover 3 at the same time, or one sealing cover 3 can be connected to the boosting pipe, and the other negative pressure pipe 303 can be connected to the negative pressure pipe 303 .

[0051] Furthermore, it also includes: a third pressure roller 203, which has two, the two third pressure rollers 203 move relative to each other, the accommodating area 204 is located between the two third pressure rollers 203, the third pressure roller 203 is used to abut against the bag body 402 of the infusion bag 4, and the third pressure roller 203 is located between the first pressure roller 201 and the second pressure roller 202.

[0052] When in use, by adding a third pressure roller 203, the pressure rollers at three different positions are used in conjunction with each other, so that a more effective bending test can be performed on the infusion bag 4, and a higher-strength leak-proof test can be performed on the surface of the bag body 402 and the sealing of the connection of the interface 401.

[0053] The first pressing roller 201, the second pressing roller 202 and the third pressing roller 203 can be rotated one by one to abut and clamp the bag body 402 of the infusion bag 4, or can be rotated two by two to abut and clamp the bag body 402, and the clamping and pressurizing effect is better. For example, the first pressing roller 201 and the second pressing roller 202 clamp the bag body 402, and the third pressing roller 203 moves away. Then, the first pressing roller 201 and the third pressing roller 203 clamp the bag body 402, and the second pressing roller 202 moves away.

[0054] like Figure 4 As shown, the bag body 402 can also be bent into a "V" shape, the two first rollers 201 and the two second rollers 202 clamp the head and tail of the bag body 402 respectively (not clamped to death), and then the two third rollers 203 clamp the middle of the bag body 402, move upward, lift the middle of the bag body 402, and then descend to make the middle of the bag body 402 convex downward, and the bending is achieved by reciprocating lifting and lowering, which effectively detects possible defects on the surface of the bag body 402. At this time, the interface 401 of the infusion bag 4 is also in an up and down swinging state, and the anti-fall test can be carried out at the same time.

[0055] Furthermore, it also includes: a workbench 1; a plurality of movable frames 101, wherein the movable frames 101 are movably arranged on the workbench 1, and the first pressing roller 201 and / or the second pressing roller 202 and / or the third pressing roller 203 are rotatably arranged on the movable frame and move with the movable frame.

[0056] When in use, the movement of the first pressing roller 201, the second pressing roller 202, the third pressing roller 203 and the sealing cover 3 can be driven by an independent cylinder assembly or a hydraulic assembly or a screw structure to drive the moving frame 101 to reciprocate, which is a prior art. The first pressing roller 201, the second pressing roller 202, and the third pressing roller 203 can be rotatably arranged with the moving frame 101, which can reduce friction and wear on the surface of the bag body 402.

[0057] A method for detecting the sealing performance of a large-volume injection, using the above-mentioned large-volume injection sealing performance detection device to perform sealing detection on an infusion bag 4, comprises the following steps:

[0058] The first step is to position the infusion bag 4, place the infusion bag 4 in the accommodation area 204, and position the interface 401 of the infusion bag 4 between the two sealing covers 3. The two second rollers 202 clamp the bag body 402 of the infusion bag 4 and keep it still, and the two first rollers 201 clamp the bag body 402 of the infusion bag 4 on one side close to the interface 401.

[0059] The second step is to conduct a pressurized anti-fall test on the infusion bag 4. The two first rollers 201 and the two second rollers 202 clamp the bag body 402 of the infusion bag 4. The bag body 402 stores a solution, so that the inside of the bag body 402 is pressurized. When the seal is insufficient, leakage will occur. The two first rollers 201 move back and forth synchronously in the same direction, so that one side of the interface 401 of the infusion bag 4 forms a reciprocating swing. When the interface 401 swings, it hits the test part 304 of the sealing cover 3 to conduct an anti-fall test.

[0060] The third step is to perform a pressurization and decompression test. The two sealing covers 3 clamp the bag body 402 of the infusion bag 4. Part of the solution in the bag body 402 is located in the closed space 301. The interface 401 is located in the closed space 301 inside the two sealing covers 3. The closed space 301 is pressurized through the boosting pipe 302, and the sealing is tested by applying pressure outside the interface 401. After stopping the pressurization, the closed space 301 is negatively pressurized through the negative pressure pipe 303, and a negative pressure is formed outside the interface 401 to test the sealing. Finally, the pressure inside and outside the closed space 301 is balanced, and the two sealing covers 3 are away from each other.

[0061] The fourth step is to perform a surface test on the bag body 402. Initially, the two third rollers 203 are away from the bag body 402 of the infusion bag 4. The two first rollers 201 and the two second rollers 202 clamp the bag body 402 of the infusion bag 4 and remain stationary. Then, the two second rollers 202 clamp the middle part of the bag body 402 of the infusion bag 4, and the two third rollers 203 move back and forth synchronously in the same direction to bend the bag body 402 of the infusion bag 4. A bending pressure test is performed, and finally the sealing test is completed.

[0062] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A sealing detection device for large-volume injections, characterized in that: include: There are two first pressing rollers (201), and the two first pressing rollers (201) move relative to each other; The second pressing roller (202) is located beside the first pressing roller (201), and has two of them. The two second pressing rollers (202) move relative to each other. A receiving area (204) is provided between the two first pressing rollers (201) and between the two second pressing rollers (202). The receiving area (204) is used to place an infusion bag (4). The first pressing roller (201) and the second pressing roller (202) are used to abut against a bag body (402) of the infusion bag (4). The axial direction of the first pressing roller (201) is perpendicular to the axial direction of the interface (401) of the infusion bag (4). After the first pressing roller (201) and the second pressing roller (202) are staggered, the interface (401) of the infusion bag (4) is driven to swing.

2. A sealing detection device for large-volume injection according to claim 1, characterized in that: Also includes: The sealing covers (3) are provided with two of them. The two sealing covers (3) are relatively movable. When the two sealing covers (3) are in contact with each other, a closed space (301) is formed inside. The interface (401) of the infusion bag (4) is located between the two sealing covers (3). The sides of the two sealing covers (3) close to the infusion bag (4) are clamped on the bag body (402) of the infusion bag (4); A pressurizing pipe (302) is connected to an external pressurizing device, is arranged on one of the sealing covers (3), is connected to the enclosed space (301), and is used to pressurize the enclosed space (301).

3. A sealing detection device for large-volume injection according to claim 2, characterized in that: The sealing cover (3) has a testing portion (304) on one side close to the interface (401) of the infusion bag (4), and the interface (401) of the infusion bag (4) abuts against the testing portion (304) after swinging.

4. A sealing detection device for large-volume injection according to claim 3, characterized in that: Also includes: A negative pressure pipe (303) is connected to an external negative pressure device, is arranged on one of the sealing covers (3), is connected to the enclosed space (301), and is used to reduce the pressure in the enclosed space (301).

5. A sealing detection device for large-volume injection according to claim 4, characterized in that: Also includes: The third pressing roller (203) has two parts, the two third pressing rollers (203) move relative to each other, the accommodating area (204) is located between the two third pressing rollers (203), the third pressing roller (203) is used to abut against the bag body (402) of the infusion bag (4), and the third pressing roller (203) is located between the first pressing roller (201) and the second pressing roller (202).

6. A sealing detection device for large-volume injection according to claim 5, characterized in that: Also includes: Workbench (1); A plurality of movable frames (101) are provided, wherein the movable frames (101) are movably arranged on the workbench (1), and the first pressing roller (201) and / or the second pressing roller (202) and / or the third pressing roller (203) are rotatably arranged on the movable frames (101) and move along with the movable frames (101).

7. A method for testing the sealing performance of a large-volume injection, using the device for testing the sealing performance of a large-volume injection as claimed in claim 5 to test the sealing performance of an infusion bag (4), characterized in that: The following steps are involved: The first step is to position the infusion bag (4), place the infusion bag (4) in the containing area (204), and position the interface (401) of the infusion bag (4) between the two sealing covers (3). The two second pressing rollers (202) clamp the bag body (402) of the infusion bag (4) and remain stationary, and the two first pressing rollers (201) clamp the bag body (402) of the infusion bag (4) on one side close to the interface (401); The second step is to conduct a pressurized drop resistance test on the infusion bag (4). The two first pressing rollers (201) and the two second pressing rollers (202) clamp the bag body (402) of the infusion bag (4). The bag body (402) stores a solution, so that the inside of the bag body (402) is pressurized. When the seal is insufficient, leakage will occur. The two first pressing rollers (201) move back and forth synchronously in the same direction, so that one side of the interface (401) of the infusion bag (4) forms a reciprocating swing. When the interface (401) swings, it hits the test part (304) of the sealing cover (3), and the drop resistance test is performed; The third step is to perform a pressurization and decompression test. The two sealing covers (3) clamp the bag body (402) of the infusion bag (4). Part of the solution in the bag body (402) is located in the closed space (301). The interface (401) is located in the closed space (301) inside the two sealing covers (3). The closed space (301) is pressurized through the pressurization tube (302), and the sealing performance is tested by pressurizing the outside of the interface (401). After the pressurization is stopped, the closed space (301) is made to have a negative pressure through the negative pressure tube (303), and a negative pressure is formed outside the interface (401) to test the sealing performance. Finally, the pressure inside and outside the closed space (301) is balanced, and the two sealing covers (3) are moved away from each other. The fourth step is to conduct a surface test on the bag body (402). Initially, the two third pressure rollers (203) are away from the bag body (402) of the infusion bag (4). The two first pressure rollers (201) and the two second pressure rollers (202) clamp the bag body (402) of the infusion bag (4) and remain stationary. Then, the two second pressure rollers (202) clamp the middle of the bag body (402) of the infusion bag (4), and the two third pressure rollers (203) move back and forth synchronously in the same direction to bend the bag body (402) of the infusion bag (4). A bending pressure test is conducted, and finally, a sealing test is completed.

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