Sterilizer door lock limiting control method

Abstract

The application provides a sterilizer door lock limiting control method, and relates to the technical field of sterilizers, which aims to solve the technical problem that the limiting mode of the limiting mechanism of the door lock of the sterilizer cannot take into account the reliability of limiting the opening of the door lock and low cost in the prior art. The sterilizer door lock limiting control method comprises a vacuum pump, a first pipeline and a wastewater assembly, the vacuum pump is connected with the wastewater assembly through the first pipeline, further comprises a pressure lock, a second pipeline and a first valve body, the pressure lock is connected with the first pipeline through the second pipeline, a reset assembly is connected to the pressure lock, and the first valve body is connected in series on the second pipeline. The method further comprises the following steps: S1, the first valve body controls the second pipeline to be connected; S2, the vacuum pump provides positive pressure to the pressure lock through the second pipeline to make the lock core extend; S3, the first valve body controls the second pipeline to be disconnected and the vacuum pump stops outputting positive pressure to the pressure lock; and S4, the first valve body controls the second pipeline to be connected.

Description

Technical Field

[0001] This invention relates to the field of sterilizer technology, specifically to a sterilizer door lock limit control method. Background Technology

[0002] Sterilizers are one of the main sterilization equipment in the pharmaceutical industry, holding an important position in production. Their main working principle is to achieve sterilization by introducing high-pressure steam inside the sterilizer. They have wide applications in medical and pharmaceutical fields. Sterilizers are equipped with doors. When the door is closed, it is prevented from opening by manually moving a lock. The door can only be opened after the lock is released. Sterilizers generally generate high-pressure steam through heating. During the heating process, the inside of the sterilizer is under high temperature and pressure. Therefore, the sterilizer door cannot be opened arbitrarily. Thus, sterilizers are equipped with door lock limiting mechanisms, which generally restrict the opening of the door by limiting the lock's movement. Currently, some sterilizer door lock limiting mechanisms use pneumatic locks. These pneumatic locks are directly connected to the sterilizer body. The high pressure generated during the heating process causes the lock cylinder to extend, preventing the door from opening. However, when the sterilizer is under negative or low pressure during operation, the pneumatic lock cylinder cannot effectively prevent the door from opening. In this situation, the door can still be manually opened, posing a significant safety hazard. Furthermore, some sterilizer door lock limiting mechanisms use electromagnets. Electromagnets are expensive, and there are two types: general electromagnets and self-holding electromagnets. General electromagnets require continuous power to lock the door and are prone to burning out, while self-holding electromagnets have complex structures and often fail to operate, resulting in insufficient reliability. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the present invention aims to provide a sterilizer door lock limit control method, thereby solving the technical problem that the existing sterilizer door lock limit mechanism cannot simultaneously ensure the reliability of limiting door opening and reduce costs.

[0004] To solve the above-mentioned technical problems, the present invention provides a sterilizer door lock limit control method, including a vacuum pump, a first pipeline, and a wastewater assembly. The vacuum pump is connected to the wastewater assembly through the first pipeline. The method further includes a pressure lock, a second pipeline, and a first valve body. The pressure lock is connected to the first pipeline through the second pipeline and its lock core is extended by the vacuum pump. A reset component for retracting the lock core is connected to the pressure lock. The first valve body is connected in series on the second pipeline. The method also includes the following steps:

[0005] S1. Before the sterilizer starts working, the first valve body controls the connection of the second pipeline;

[0006] S2. The vacuum pump provides positive pressure to the pressure lock through the second pipeline, causing the lock cylinder to extend.

[0007] S3, The first valve body controls the second pipeline to disconnect and the vacuum pump stops outputting positive pressure to the pressure lock;

[0008] S4. After the sterilizer finishes working, the first valve body controls the connection of the second pipeline.

[0009] After adopting the above method, the sterilizer door lock limit control method of the present invention has the following advantages: the door lock is closed at the same time as the sterilizer door is closed to lock the door. Before the sterilizer starts working, the first valve body connects to the second pipeline, and the vacuum pump provides positive pressure to the pressure lock, causing the lock core to extend. The lock core restricts the opening of the sterilizer door lock. Afterwards, the first valve body disconnects the second pipeline, the pressure lock is maintained in a pressure state, and the lock core remains in the extended state. When the sterilizer finishes working and the door needs to be opened, the first valve body connects to the second pipeline again, and the pressure lock is depressurized to the wastewater component through the first and second pipelines. The reset component causes the lock core to reset and retract. At this time, the sterilizer door lock and door can be opened. When restricting the opening of the door, the present invention is not affected by the pressure of the sterilizer body. The pressure of the pressure lock is locked by the first valve body, ensuring that the door lock and door cannot be opened during the entire working process of the sterilizer, which greatly improves the safety and reliability of the sterilizer. Moreover, the vacuum pump, the first pipeline, and the wastewater component all directly utilize the structure of the sterilizer itself, and the overall structure is simple and the cost is low.

[0010] As an improvement, the vacuum pump is connected to a third pipeline that communicates with the atmosphere, and a second valve body is connected in series on the third pipeline; in step S1, the second valve body controls the connection of the third pipeline; in this way, since the vacuum pump is directly used to drain the wastewater from the sterilizer in the prior art, the setting of the third pipeline can not only ensure the start-up of the vacuum pump, but also discharge the condensate in the vacuum pump, thereby enabling the application of the vacuum pump in the prior art to reduce costs in this invention.

[0011] As an improvement, the pressure lock is connected to a detection switch for detecting the extension of the lock cylinder; in step S2, when the detection switch detects the extension of the lock cylinder, the process proceeds to step S3; in this way, the detection switch acts as a feedback device for the extension of the lock cylinder, ensuring that the sterilizer will only start working when the lock cylinder extends and limits the door body and door lock, thereby improving safety.

[0012] As an improvement, in step S2, the vacuum pump provides positive pressure to the pressure lock for a duration of t1 before proceeding to step S3. In this way, the vacuum pump provides positive pressure to the pressure lock for a period of time, ensuring that the lock cylinder extends to limit the door body and the door lock, thereby improving security.

[0013] As an improvement, the duration t1 ranges from 0.5s to 5s.

[0014] As an improvement, a third valve body is connected in series on the first pipeline, and the connection point between the second pipeline and the first pipeline is located between the vacuum pump and the third valve body; in step S1, the third valve body controls the first pipeline to disconnect; in step S4, the third valve body controls the first pipeline to connect. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0016] Reference numerals in the attached drawings: 1. Vacuum pump; 2. First pipeline; 3. Wastewater assembly; 4. Pressure lock; 5. Second pipeline; 6. First valve body; 7. Third pipeline; 8. Second valve body; 9. Third valve body. Detailed Implementation

[0017] The following is a detailed description of a sterilizer door lock limit control method according to the present invention, with reference to the accompanying drawings.

[0018] like Figure 1 As shown, a sterilizer door lock limit control method includes a vacuum pump 1, a first pipeline 2, and a wastewater assembly 3. The vacuum pump 1 is connected to the wastewater assembly 3 through the first pipeline 2. The vacuum pump 1, the first pipeline 2, and the wastewater assembly 3 are all existing sterilizer structures, and their specific structures and working principles are also existing technologies, which will not be described in detail here. In addition, the present invention also includes a pressure lock 4, a second pipeline 5, and a first valve body 6. The pressure lock 4 is connected to the first pipeline 2 through the second pipeline 5 and the lock core of the pressure lock 4 is driven to extend by the vacuum pump 1. A reset component for driving the lock core to retract is connected to the pressure lock 4. The first valve body 6 is connected in series on the second pipeline 5. The pressure lock 4 is a limit mechanism for the lock core to extend by air pressure, which can be a cylinder. In this embodiment, the pressure lock 4 includes a lock body, a lock core, and a diaphragm. After the vacuum pump 1 provides positive pressure to the pressure lock 4, the diaphragm deforms, causing the lock core to extend. The reset component is a spring sleeved on the lock core, and its specific structure is existing technology, which will not be described in detail here.

[0019] The present invention also includes the following steps:

[0020] S1. Before the sterilizer starts working, the first valve body 6 controls the connection of the second pipeline 5.

[0021] S2, Vacuum pump 1 provides positive pressure to pressure lock 4 through second pipeline 5, causing the lock cylinder to extend;

[0022] S3, the first valve body 6 controls the second pipeline 5 to disconnect and the vacuum pump 1 to stop outputting positive pressure to the pressure lock 4;

[0023] S4. After the sterilizer finishes working, the first valve body 6 controls the connection of the second pipeline 5.

[0024] In step S2 above, vacuum pump 1 inputs air from the sterilizer body and residual water vapor from the pipeline into pressure lock 4. In this embodiment, vacuum pump 1 is connected to a third pipeline 7 that communicates with the atmosphere, and a second valve body 8 is connected in series on the third pipeline 7. Therefore, in step S1 of this embodiment, the second valve body 8 controls the third pipeline 7 to be connected, and vacuum pump 1 draws in the atmosphere into pressure lock 4, and can also discharge condensate from vacuum pump 1.

[0025] The pressure lock 4 is connected to a detection switch for detecting the extension of the lock cylinder; in step S2, when the detection switch detects the extension of the lock cylinder, the process proceeds to step S3. Similarly, in step S4, after the first valve body 6 controls the second pipeline 5 to connect, the process is completed when the detection switch detects the retraction of the lock cylinder. In this embodiment, the detection switch is a micro switch.

[0026] In some other embodiments, instead of setting a detection switch, step S2 is performed where the vacuum pump 1 provides positive pressure to the pressure lock 4 for a duration of t1, and then the process proceeds to step S3. The duration t1 ranges from 0.5s to 5s. That is, the vacuum pump 1 continuously provides pressure to the pressure lock 4 for 0.5s to 5s to ensure that the lock cylinder extends. The specific time can be set according to the actual usage. Similarly, in step S4, after the first valve body 6 controls the second pipeline 5 to be connected, the state of the first valve body 6 remains unchanged for a duration of t2, which ranges from 0.5s to 5s.

[0027] In addition, a third valve body 9 is connected in series on the first pipeline 2, and the connection point between the second pipeline 5 and the first pipeline 2 is located between the vacuum pump 1 and the third valve body 9; in step S1, the third valve body 9 controls the first pipeline 2 to disconnect; in step S4, the third valve body 9 controls the first pipeline 2 to connect, and the third valve body 9 also utilizes the structure of the sterilizer in the prior art. The third valve body 9 is a two-position three-way solenoid valve, and its specific structure and working principle will not be described in detail here.

[0028] The door lock is closed simultaneously with the sterilizer door to prevent it from opening. Before the sterilizer starts working, the first valve body 6 connects to the second pipeline 5, and the vacuum pump 1 provides positive pressure to the pressure lock 4, causing the lock core to extend. The lock core restricts the opening of the sterilizer door lock. Afterward, the first valve body 6 disconnects the second pipeline 5, and the pressure lock 4 remains under pressure, with the lock core remaining in the extended state. When the sterilizer finishes working and the door needs to be opened, the first valve body 6 reconnects to the second pipeline 5, and the pressure lock 4 is depressurized to the wastewater assembly 3 via the first pipeline 2 and the second pipeline 5. The reset assembly resets the lock core, allowing the sterilizer door lock and door to open. This invention is not affected by the pressure of the sterilizer body when restricting the door from opening. The pressure of the pressure lock 4 is locked by the first valve body 6, ensuring that the door lock and door cannot be opened during the entire sterilizer operation, greatly improving the safety and reliability of the sterilizer. Moreover, the vacuum pump 1, the first pipeline 2, and the wastewater assembly 3 all directly utilize the structure of the sterilizer itself, resulting in a simple overall structure and low cost.

[0029] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above-described embodiment. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

Claims

1. A method for limiting the door lock of a sterilizer, comprising a vacuum pump (1), a first pipeline (2), and a wastewater assembly (3), wherein the vacuum pump (1) is connected to the wastewater assembly (3) through the first pipeline (2), characterized in that, It also includes a pressure lock (4), a second pipeline (5), and a first valve body (6). The pressure lock (4) is connected to the first pipeline (2) through the second pipeline (5) and the lock cylinder of the pressure lock (4) is driven to extend by the vacuum pump (1). A reset assembly for driving the lock cylinder to retract is connected to the pressure lock (4). The first valve body (6) is connected in series with the second pipeline (5). It also includes the following steps: S1. Before the sterilizer starts working, the first valve body (6) controls the second pipeline (5) to connect; S2, The vacuum pump (1) provides positive pressure to the pressure lock (4) through the second pipeline (5) so that the lock cylinder extends; S3, the first valve body (6) controls the second pipeline (5) to disconnect and the vacuum pump (1) to stop outputting positive pressure to the pressure lock (4); S4. After the sterilizer finishes working, the first valve body (6) controls the second pipeline (5) to connect.

2. The sterilizer door lock limit control method according to claim 1, characterized in that, The vacuum pump (1) is connected to a third pipeline (7) that communicates with the atmosphere, and a second valve body (8) is connected in series on the third pipeline (7); in step S1, the second valve body (8) controls the third pipeline (7) to be connected.

3. The sterilizer door lock limit control method according to claim 1, characterized in that, The pressure lock (4) is connected to a detection switch for detecting the extension of the lock cylinder; in step S2, when the detection switch detects the extension of the lock cylinder, the process proceeds to step S3.

4. The sterilizer door lock limit control method according to claim 1, characterized in that, After the vacuum pump (1) in step S2 provides positive pressure to the pressure lock (4) for a duration of t1, the process proceeds to step S3.

5. The sterilizer door lock limit control method according to claim 4, characterized in that, The duration t1 ranges from 0.5s to 5s.

6. The sterilizer door lock limit control method according to claim 1, characterized in that, A third valve body (9) is connected in series on the first pipeline (2), and the connection point between the second pipeline (5) and the first pipeline (2) is located between the vacuum pump (1) and the third valve body (9); in step S1, the third valve body (9) controls the first pipeline (2) to disconnect; in step S4, the third valve body (9) controls the first pipeline (2) to connect.

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