Self-contained pressure steam biological indicator

Abstract

The utility model discloses a self-contained pressure steam biological indicator, and relates to the technical field of biological indicators, the self-contained pressure steam biological indicator comprises a bottle body, the bottle body is provided with a containing cavity, a bacterial contamination carrier plate and a culture medium tube are arranged in the containing cavity, the bottle body is provided with a bacterial blocking film, the bacterial blocking film is used for covering an opening of the containing cavity, and the bottle body is connected with a middle cover; the middle cover is provided with a channel communicated with the containing cavity, the middle cover is provided with an upper cover, the middle cover is provided with an installation part, the upper cover is provided with an installation groove used for being matched with the installation part, the upper cover is provided with an air inlet groove communicated with the installation groove, and a control structure is connected between the upper cover and the installation part and used for controlling connection and disconnection of the installation groove and the air inlet groove. The control structure controls the installation groove to be communicated with the air inlet groove, the indicator is placed in the pressure steam kettle for sterilization, after sterilization and before incubation, the control structure controls the installation groove to be separated from the air inlet groove, air is prevented from entering the containing cavity, and the accuracy of the detection result can be effectively guaranteed.

Description

Technical Field

[0001] This application relates to the technical field of biological indicators, and in particular to a self-contained pressure steam biological indicator. Background Technology

[0002] Self-contained pressure steam bioindicators are microbial detection tools used to verify the effectiveness of pressure steam sterilization processes. They are widely used in medical institutions, laboratories, pharmaceutical industries, and other fields requiring sterile environments to ensure that sterilization equipment can effectively kill all microorganisms, including bacterial spores.

[0003] Traditional self-contained steam sterilization biological indicators consist of a bottle, a bacterial substrate, ampoules, dialysis paper, and a cap. The bacterial substrate is placed at the bottom of the bottle, with the ampoules placed on top of the substrate. Dialysis paper and the cap are placed at the end of the bottle. These biological indicators typically have several small holes on the cap or side to allow high-temperature steam to flow into the bottle for sterilization. In use, the biological indicator is first placed in the sterilization chamber. After sterilization, the ampoules in the bottle are broken to allow the culture medium to saturate the bacterial substrate, incubating the spores within. After a certain time, if spores hatch on the substrate, sterilization is incomplete; otherwise, sterilization is complete.

[0004] Because of factors such as the lack of a seal between the bottle and the cap, and the presence of small holes in the cap, it is difficult to ensure a tight seal during the incubation process for this type of biological indicator, which affects the test results. Utility Model Content

[0005] The purpose of this application is to provide a self-contained pressure vapor biological indicator to ensure the detection results of the indicator.

[0006] This application provides a self-contained pressure steam biological indicator with the following technical solution: It includes a bottle body with a receiving cavity containing a contaminated carrier plate and a culture medium tube. The bottle body is also provided with a bacteriostatic membrane covering the opening of the receiving cavity. A middle cap is connected to the bottle body, and the middle cap has a channel communicating with the receiving cavity. The middle cap has a top cap with a mounting portion. The top cap has a mounting groove for engaging with the mounting portion and an air inlet groove communicating with the mounting groove. A control structure connects the top cap and the mounting portion, controlling the connection between the mounting groove and the air inlet groove.

[0007] By adopting the above technical solution, the control structure controls the installation slot and the air inlet slot to conduct electricity. The indicator is placed in the pressure steam boiler for sterilization. After sterilization and before incubation, the control structure controls the installation slot and the air inlet slot to be separated, which effectively prevents air from entering the installation slot through the air inlet slot, that is, prevents air from entering the containment cavity, and can effectively ensure the accuracy of the test results.

[0008] Optionally, the control structure includes a sealing ring disposed on the mounting portion and two annular grooves for engaging with the sealing ring. Both annular grooves are disposed on the upper cover and communicate with the mounting groove. The air intake groove communicates with one of the annular grooves. When the sealing ring is engaged in one of the annular grooves, the air intake groove communicates with the mounting groove; when the sealing ring is engaged in the other annular groove, the air intake groove is isolated from the mounting groove.

[0009] By adopting the above technical solution, a sealing ring is set on the mounting part, and two matching ring grooves are set on the top cover. When the sealing ring is engaged in one of the ring grooves, the air inlet groove is connected to the mounting groove, ensuring that high-temperature steam can smoothly enter the containment chamber to complete the sterilization process. When the sealing ring is engaged in the other ring groove, the air inlet groove is isolated from the mounting groove, effectively preventing external environment from contaminating the internal culture medium and contaminated carrier plate, thereby improving the reliability of the test results. This design significantly enhances the sealing and controllability of the biological indicator during use. The inner wall of the ring groove restricts the movement of the sealing ring, thereby improving the stability of the top cover installed on the middle cover.

[0010] Optionally, when the side of the mounting part away from the middle cover abuts against the bottom wall of the mounting groove, the sealing ring is engaged in one of the ring grooves, and the air inlet groove is separated from the mounting groove.

[0011] By adopting the above technical solution, when the side of the mounting part away from the middle cover abuts against the bottom wall of the mounting groove, the sealing ring is engaged in the ring groove, so that the sealing ring moves precisely to the corresponding position.

[0012] Optionally, four air intake slots are provided on the upper cover, and the four air intake slots are evenly distributed around the axis of the upper cover.

[0013] By adopting the above technical solution, the four air inlet slots are evenly distributed around the centerline of the top cover, ensuring that high-temperature steam enters the bottle evenly from multiple directions, improving the efficiency and uniformity of the sterilization process. This design also enhances the adaptability of the biological indicator at different placement angles, avoiding incomplete sterilization caused by a single air inlet direction.

[0014] Optionally, the mounting part is provided with a sealing ring, which surrounds the opening of the channel. When the air inlet groove is separated from the mounting groove, the sealing ring abuts against the top cover.

[0015] By adopting the above technical solution, when the air inlet slot and the mounting slot are separated, the sealing ring abuts against the top cover, which can effectively prevent gas from entering the bottle body from the gap between the top cover and the mounting part, thereby improving the sealing performance of the biological indicator, ensuring the stability of the internal environment during sterilization and incubation, and avoiding interference from external factors on the test results.

[0016] Optionally, the mounting portion is provided with a groove for engaging with the sealing ring.

[0017] By adopting the above technical solution, the mounting section is provided with a groove for mating with the sealing ring, ensuring a stable positioning structure for the sealing ring during installation, thereby improving sealing performance. The mating of the sealing ring and the groove increases the gas movement path, enhancing the sealing effect.

[0018] Optionally, the control structure includes an external thread provided on the mounting portion, the external thread being threadedly connected to the upper cover.

[0019] By adopting the above technical solution, the top cover and the mounting part are partially threaded, and the air inlet groove is connected to the mounting groove, ensuring that high-temperature steam can smoothly enter the containment cavity to complete the sterilization process; the top cover and the mounting part are fully threaded, and the side of the mounting part away from the middle cover abuts against the bottom wall of the mounting groove, and the air inlet groove is separated from the mounting groove, effectively preventing the external environment from contaminating the internal culture medium and the contaminated carrier plate, thereby improving the reliability of the test results.

[0020] Optionally, the outer peripheral surface of the bottle is provided with a clearance groove for cooperating with the antibacterial membrane.

[0021] By adopting the above technical solution, the antibacterial membrane and the clearance groove are matched to ensure that the antibacterial membrane is accurately installed in the corresponding position.

[0022] Optionally, the outer peripheral surface of the bottle body is provided with a snap-fit ​​part, and the inner peripheral surface of the middle cover is provided with a snap-fit ​​groove, wherein the snap-fit ​​part and the snap-fit ​​groove are snap-fitted together.

[0023] By adopting the above technical solution, a reliable connection is achieved between the bottle body and the middle cap through the snap-fit ​​part and snap-fit ​​groove, ensuring that the two will not easily separate during use.

[0024] Optionally, the snap-fit ​​portion is provided with an inclined surface, which is located on the side of the snap-fit ​​portion near the mounting portion.

[0025] By adopting the above technical solution, the inclined surface of the snap-fit ​​part makes the assembly of the snap-fit ​​part and the snap-fit ​​groove more convenient. The inclined surface is located on the side of the snap-fit ​​part closer to the mounting part, which plays a guiding role during the installation process, reduces the resistance during assembly, improves the assembly efficiency and reduces the risk of damage.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. The control structure connects the mounting slot and the air inlet slot. The indicator is placed in a pressure steam oven for sterilization. After sterilization and before incubation, the control structure separates the mounting slot and the air inlet slot to effectively prevent air from entering the mounting slot through the air inlet slot, thus preventing air from entering the containment cavity and ensuring the accuracy of the test results.

[0028] 2. When the sealing ring is engaged in one of the ring grooves, the air inlet groove is connected to the mounting groove, ensuring that high-temperature steam can smoothly enter the containment cavity to complete the sterilization process; when the sealing ring is engaged in the other ring groove, the air inlet groove is isolated from the mounting groove, effectively preventing the external environment from contaminating the internal culture medium and the contaminated carrier plate, thereby improving the reliability of the test results. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the channel being connected in Embodiment 1 of this application.

[0030] Figure 2 yes Figure 1 A sectional view.

[0031] Figure 3 yes Figure 2 An enlarged view of region A.

[0032] Figure 4 yes Figure 2 A magnified view of region B.

[0033] Figure 5 This is a schematic diagram of the overall structure of channel closure in Embodiment 1 of this application.

[0034] Figure 6 yes Figure 5 A sectional view.

[0035] Figure 7 yes Figure 6 A magnified view of region C.

[0036] Figure 8 This is a schematic diagram of the overall structure of the channel being connected in Embodiment 2 of this application.

[0037] Figure 9 yes Figure 8 A magnified view of region D.

[0038] Figure 10 This is a schematic diagram of the overall structure of channel closure in Embodiment 2 of this application.

[0039] Figure 11 yes Figure 10 A magnified view of region E.

[0040] Explanation of reference numerals in the attached drawings: 1. Bottle body; 11. Receiving cavity; 12. Snap-fit ​​part; 121. Inclined surface; 13. Clearance groove; 2. Infected substrate plate; 3. Culture medium tube; 4. Middle cover; 41. Snap-fit ​​groove; 42. Channel; 43. Mounting part; 431. Groove; 5. Antibacterial membrane; 6. Top cover; 61. Mounting groove; 62. Air inlet groove; 7. Control structure; 71. Sealing ring; 72. Ring groove; 8. Sealing ring. Detailed Implementation

[0041] The following is in conjunction with the appendix Figure 1 - Appendix Figure 11 This application will be described in further detail.

[0042] This application discloses a self-contained pressure steam biological indicator.

[0043] Example 1

[0044] Combination Figure 1 , Figure 2 and Figure 3 As shown, the device includes a bottle body 1 with a receiving cavity 11. A bacterial carrier plate 2 and a culture medium tube 3 are placed within the receiving cavity 11, with the culture medium tube 3 located between the bacterial carrier plate 2 and the opening of the receiving cavity 11. A middle cap 4 is attached to the outer surface of the bottle body 1. Two snap-fit ​​portions 12 are arranged opposite each other on the outer circumferential surface of the bottle body 1. The snap-fit ​​portions 12 are made of elastic material. A snap-fit ​​groove 41 for engaging with the snap-fit ​​portions 12 is formed on the inner circumferential surface of the middle cap 4. An inclined surface 121 is formed at the end of the snap-fit ​​portion 12 away from the bottle body 1, and the inclined surface 121 is located on the upper surface of the snap-fit ​​portion 12.

[0045] Combining him 2 and Figure 4 As shown, the bottle body 1 is connected to an antibacterial membrane 5. An annular groove 13 is formed on the outer circumferential surface of the bottle body 1 to mate with the antibacterial membrane 5. The antibacterial membrane 5 covers the opening of the receiving cavity 11. When the middle cover 4 is connected to the bottle body 1, the middle cover 4 covers the antibacterial membrane 5. The middle cover 4 has a channel 42 that communicates with the receiving cavity 11. The middle cover 4 is connected to an upper cover 6. An mounting part 43 is provided on the upper surface of the middle cover 4. The mounting part 43 is integrally formed with the middle cover 4. The channel 42 passes through the mounting part 43. The upper cover 6 has a mounting groove 61 that mates with the mounting part 43. Four air inlet grooves 62 communicating with the mounting groove 61 are formed on the inner wall of the mounting groove 61. The four air inlet grooves 62 are evenly distributed around the axis of the upper cover 6.

[0046] Combination Figure 4 , Figure 5 , Figure 6 and Figure 7A control structure 7 connects the upper cover 6 and the mounting part 43. The control structure 7 includes a sealing ring 71 disposed on the outer peripheral surface of the mounting part 43 and two annular grooves 72 for engaging with the sealing ring 71. The sealing ring 71 is located at the end of the mounting part 43 away from the middle cover 4, and the sealing ring 71 is integrally formed with the mounting part 43. The two annular grooves 72 are formed inside the upper cover 6 and are distributed along the thickness direction of the upper cover 6. Both annular grooves 72 are connected to the mounting groove 61. The air intake groove 62 is connected to one of the annular grooves 72. When the sealing ring 71 is engaged in one of the annular grooves 72, the air intake groove 62 is connected to the mounting groove 61. When the side of the mounting part 43 away from the middle cover 4 abuts against the bottom wall of the mounting groove 61, the sealing ring 71 is engaged in the other annular groove 72, and the air intake groove 62 is separated from the mounting groove 61. A sealing ring 8 is connected to the side of the mounting part 43 away from the middle cover 4. The sealing ring 8 surrounds the opening of the channel 42. Both the mounting part 43 and the upper cover 6 have grooves 431 for engaging with the sealing ring 8.

[0047] The implementation principle of a self-contained pressure steam biological indicator in this application embodiment is as follows:

[0048] When the sealing ring 71 is engaged in one of the ring grooves 72, the air inlet groove 62 is connected to the mounting groove 61, and the indicator is placed in the pressure steam boiler for sterilization, ensuring that high-temperature steam smoothly enters the containment chamber 11 to complete the sterilization process; after sterilization and before incubation, the top cover 6 is pressed down, and the sealing ring 71 is engaged in the other ring groove 72, separating the air inlet groove 62 from the mounting groove 61, effectively preventing the external environment from contaminating the internal culture medium and the contaminated carrier plate 2, thereby improving the reliability of the test results.

[0049] Example 2

[0050] The difference between this embodiment and Embodiment 1 is that, in combination with Figure 8 , Figure 9 , Figure 10 and Figure 11 As shown, the control structure 7 includes an external thread on the outer peripheral surface of the mounting part 43, and the external thread is threadedly connected to the upper cover 6.

[0051] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A self-contained pressure steam biological indicator, comprising a bottle (1), wherein the bottle (1) is provided with a receiving cavity (11), wherein a bacterial carrier plate (2) and a culture medium tube (3) are disposed in the receiving cavity (11), wherein the bottle (1) is provided with a bacteriostatic membrane (5), wherein the bacteriostatic membrane (5) is used to cover the opening of the receiving cavity (11), wherein the bottle (1) is connected to a middle cover (4), wherein the middle cover (4) is provided with a channel (42) communicating with the receiving cavity (11), and wherein the middle cover (4) is provided with a top cover (6), characterized in that: The middle cover (4) is provided with a mounting part (43), the upper cover (6) is provided with a mounting groove (61) for cooperating with the mounting part (43), the upper cover (6) is provided with an air intake groove (62) communicating with the mounting groove (61), and a control structure (7) is connected between the upper cover (6) and the mounting part (43). The control structure (7) is used to control the connection and disconnection between the mounting groove (61) and the air intake groove (62).

2. The self-contained pressure-steam biological indicator according to claim 1, wherein: The control structure (7) includes a sealing ring (71) disposed on the mounting part (43) and two annular grooves (72) for cooperating with the sealing ring (71). Both annular grooves (72) are disposed on the upper cover (6) and both annular grooves (72) are connected to the mounting groove (61). The air intake groove (62) is connected to one of the annular grooves (72). When the sealing ring (71) is inserted into one of the annular grooves (72), the air intake groove (62) is connected to the mounting groove (61); when the sealing ring (71) is inserted into the other annular groove (72), the air intake groove (62) is separated from the mounting groove (61).

3. The self-contained pressure-steam biological indicator according to claim 2, wherein: When the side of the mounting part (43) away from the middle cover (4) abuts against the bottom wall of the mounting groove (61), the sealing ring (71) is inserted into one of the ring grooves (72), and the air inlet groove (62) is separated from the mounting groove (61).

4. The self-contained pressure-steam biological indicator of claim 1, wherein: Four air intake slots (62) are provided on the upper cover (6), and the four air intake slots (62) are evenly distributed around the axis of the upper cover (6).

5. The self-contained pressure-steam biological indicator according to claim 2, wherein: The mounting part (43) is provided with a sealing ring (8), which surrounds the opening of the channel (42). When the air inlet groove (62) is separated from the mounting groove (61), the sealing ring (8) abuts against the top cover (6).

6. The self-contained pressure-steam biological indicator according to claim 5, wherein: The mounting part (43) is provided with a groove (431) for engaging with the sealing ring (8).

7. The self-contained pressure-steam biological indicator according to claim 1, wherein: The control structure (7) includes an external thread provided on the mounting part (43), which is threadedly connected to the upper cover (6).

8. The self-contained pressure-steam biological indicator according to claim 1, wherein: The outer peripheral surface of the bottle body (1) is provided with a clearance groove (13) for cooperating with the antibacterial membrane (5).

9. The self-contained pressure-steam biological indicator according to claim 1, wherein: The outer circumferential surface of the bottle body (1) is provided with a snap-fit ​​part (12), and the inner circumferential surface of the middle cover (4) is provided with a snap-fit ​​groove (41). The snap-fit ​​part (12) and the snap-fit ​​groove (41) are snap-fitted together.

10. The self-contained pressure-steam biological indicator according to claim 9, wherein: The snap-fit ​​portion (12) is provided with an inclined surface (121), which is located on the side of the snap-fit ​​portion (12) near the mounting portion (43).

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