Pressure switch suitable for cover opening device of sterilizer

Abstract

The utility model relates to the technical field of sterilizers, and discloses a pressure switch suitable for a cover opening device of a sterilizer, which comprises a microswitch and a separation blade arranged on the microswitch, and further comprises a safety pin outer sleeve arranged below the separation blade, the upper end and the lower end of the safety pin outer sleeve are both provided with external threads, and the safety pin outer sleeve is provided with external threads. The upper end of the safety pin outer sleeve is in threaded connection with a first nut, a pin shaft and a corrugated pipe are placed in the safety pin outer sleeve, the upper end of the pin shaft extends out of the safety pin outer sleeve, the pin shaft is located below the blocking piece, and the lower end of the pin shaft is fixedly connected with the corrugated pipe. The lower end of the corrugated pipe is communicated with an air inlet connector, the air inlet connector is located in a second nut, and the second nut is in threaded connection with the lower end of the safety pin outer sleeve. The utility model solves the problem that a traditional mechanical interlocking mode is not suitable for a novel sterilizer with an upward flip type door opening mode.

Description

TECHNICAL FIELD

[0001] The utility model relates to sterilizer technical field, specifically be applicable to the pressure switch of sterilizer uncovering device. BACKGROUND

[0002] Pressure steam sterilizer is the equipment that utilizes saturated steam to sterilize and disinfect articles rapidly and reliably, and is widely used in medical and health industry and scientific research institutions, and is suitable for sterilizing and disinfecting medical instruments, dressings, glassware, solution culture medium and the like, and is an ideal sterilizing and disinfecting equipment. However, the conventional sterilizer adopts a side opening type uncovering mode, and is matched with a mechanical interlocking, but this interlocking mode is not suitable for the new type of sterilizer with an upturned cover type door opening mode, and therefore a new type of interlocking mode is required to ensure the uncovering safety of the upturned cover type uncovering mode. SUMMARY

[0003] In order to solve the above problems of the prior art, the utility model provides a pressure switch applicable to a sterilizer uncovering device, which solves the problem that the conventional mechanical interlocking mode is not suitable for the new type of sterilizer with an upturned cover type door opening mode.

[0004] To achieve the above object, the utility model provides the following technical scheme: a pressure switch applicable to a sterilizer uncovering device, comprising a micro switch and a baffle arranged on the micro switch, further comprising an insurance pin sleeve arranged below the baffle, the upper end and the lower end of the insurance pin sleeve are provided with external threads, the upper end of the insurance pin sleeve is threadedly connected with a first nut, the inside of the insurance pin sleeve is placed with a pin shaft and a bellows, the upper end of the pin shaft extends out of the insurance pin sleeve, the pin shaft is located below the baffle, the lower end of the pin shaft is fixedly connected with the bellows, the lower end of the bellows is connected in communication with a gas inlet joint, the gas inlet joint is located in a second nut, and the second nut is threadedly connected with the lower end of the insurance pin sleeve.

[0005] With the above structure design, the device is installed on the sterilizer, the inside of the sterilizer is connected in communication with the gas inlet joint, the gas pressure enters the closed space of the bellows in the insurance pin sleeve from the gas inlet joint, under the action of a certain pressure, the bellows moves from below to above, the pin shaft extends out of the insurance pin sleeve, the baffle of the micro switch is touched, the micro switch will disconnect the return circuit of the electromagnet on the sterilizer, the electromagnet cannot perform the uncovering action, and the sterilization cavity cover cannot be opened, so that the safety of sterilization uncovering is ensured, and the possibility of opening the upper cover due to human error is avoided.

[0006] Preferably, the upper end of the gas inlet joint is fixedly sleeved with a limiting disc on the side, the outer diameter of the limiting disc is greater than the inner diameter of the lower through hole of the second nut.

[0007] With the above structure design, the air inlet joint is fixed at the lower end of the safety pin sleeve through cooperation of the second nut and the limiting disc.

[0008] Preferably, the upper end and the lower end of the bellows are fixedly connected with a first fixing disc and a second fixing disc respectively, the upper end of the second fixing disc is fixedly connected with a limiting column, the upper end of the limiting column passes through the first fixing disc and is fixedly connected with a stop block, and the upper end of the air inlet joint is threadedly connected with the second fixing disc.

[0009] With the above structure design, the limiting column is arranged to prevent the bellows from being damaged due to excessive expansion caused by excessive internal pressure of the sterilizer.

[0010] Preferably, the upper end of the first fixing disc is fixedly connected with a limiting block, and the lower end of the pin shaft is clamped in the limiting block.

[0011] With the above structure design, the pin shaft is fixed at the upper end of the bellows through the limiting block.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] The device is installed on the sterilizer, the inside of the sterilizer is communicated with the air inlet joint, the gas pressure enters the closed space of the bellows in the safety pin sleeve from the air inlet joint, under the action of certain pressure, the bellows moves from the lower end to the upper end, the pin shaft is stretched out of the safety pin sleeve, touches the stop piece of the micro switch, and the contact of the micro switch is disconnected. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is a structural schematic view of the utility model;

[0015] Fig. 2 It is a three-dimensional exploded view of the utility model;

[0016] Fig. 3 It is an internal sectional view of the utility model. DETAILED DESCRIPTION

[0017] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0018] Please refer to Figs. 1 to 3 The utility model provides a technical scheme: a pressure switch suitable for sterilizer uncovering device, including micro -switch 8 and setting micro -switch 8 on the baffle 9, micro -switch 8 is installed on mounting bracket 10, still including the safety pin outer sleeve 6 of setting in the baffle 9 below, the upper end and the lower end of safety pin outer sleeve 6 all are provided with outer thread, the upper end of safety pin outer sleeve 6 is connected with mounting bracket 10 through first nut 7, the inside of safety pin outer sleeve 6 places pin shaft 5 and bellows 4, the upper end of pin shaft 5 is out of safety pin outer sleeve 6, pin shaft 5 is located baffle 9 below, the lower end of pin shaft 5 is connected with bellows 4, the lower end of bellows 4 is connected with the communication of air inlet connector 2, air inlet connector 2 is located in the second nut 1, the second nut 1 is connected with the lower end of safety pin outer sleeve 6 thread.

[0019] The upper end of the air inlet connector 2 is fixedly sleeved with a limiting disc 201 on the side, and the outer diameter of the limiting disc 201 is greater than the inner diameter of the lower through hole of the second nut 1.

[0020] The upper end and the lower end of the bellows 4 are respectively fixedly connected with a first fixed disc 401 and a second fixed disc 402, the upper end of the second fixed disc 402 is fixedly connected with a limiting column 403, the upper end of the limiting column 403 passes through the first fixed disc 401 and is fixedly connected with a stop block 405, and the upper end of the air inlet connector 2 is screw-connected with the second fixed disc 402.

[0021] The upper end of the first fixed disc 401 is fixedly connected with a limiting block 404, and the lower end of the pin shaft 5 is clamped in the limiting block 404.

[0022] Working principle: install the device on the sterilizer, the inside of the sterilizer is communicated with the gas inlet joint 2, the gas pressure enters the closed space of the bellows 4 in the safety pin sleeve 6 from the gas inlet joint 2, under the action of certain pressure, the bellows 4 moves from bottom to top, the pin shaft 5 extends from the safety pin sleeve 6, touches the baffle 9 of the micro switch 8, the micro switch 8 will disconnect the return circuit of the electromagnet on the sterilizer, the electromagnet cannot implement the opening cover action, the sterilization cavity cover cannot be opened, thereby ensuring the safety of the sterilization opening cover, with the decrease of the pressure in the sterilizer, because the downward restoring force of the pin shaft 5 is greater than the pressure of the residual gas, the bellows 4 starts to shrink, at this time, the pin shaft 5 is driven to move downward, helps the pin shaft 5 to return to the original position, and the sterilization cavity cover can be opened.

[0023] The contents not described in detail in the specification belong to the prior art known to those skilled in the art. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A pressure switch suitable for use in an autoclave door opening device, comprising a microswitch (8) and a baffle (9) arranged on the microswitch (8), characterized in that: The safety pin sleeve (6) is arranged below the baffle (9), the upper end and the lower end of the safety pin sleeve (6) are provided with external threads, the upper end of the safety pin sleeve (6) is threadedly connected with a first nut (7), the safety pin sleeve (6) internally accommodates a pin shaft (5) and a bellows (4), the upper end of the pin shaft (5) extends out of the safety pin sleeve (6), the pin shaft (5) is located below the baffle (9), the lower end of the pin shaft (5) is fixedly connected with the bellows (4), the lower end of the bellows (4) is in communication with an air inlet joint (2), the air inlet joint (2) is located in a second nut (1), and the second nut (1) is threadedly connected with the lower end of the safety pin sleeve (6).

2. A pressure switch for use in a sterilizer decap apparatus according to claim 1, wherein: The upper end of the air inlet joint (2) is peripherally fixedly provided with a limiting disc (201), and the limiting disc (201) has an outer diameter greater than the inner diameter of the lower through hole of the second nut (1).

3. A pressure switch for use in an unscrambler door opening device according to claim 1, wherein: The upper end and the lower end of the bellows (4) are fixedly connected with a first fixed disc (401) and a second fixed disc (402), respectively, the upper end of the second fixed disc (402) is fixedly connected with a limiting column (403), the upper end of the limiting column (403) penetrates through the first fixed disc (401) and is fixedly connected with a stop block (405), and the upper end of the air inlet joint (2) is threadedly connected with the second fixed disc (402).

4. A pressure switch for use in an unscrambler door opening device according to claim 3, characterized in that: The upper end of the first fixed disc (401) is fixedly connected with a limiting block (404), and the lower end of the pin shaft (5) is clamped in the limiting block (404).

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