Ethylene oxide vaporization addition device

Abstract

The utility model discloses an ethylene oxide vaporization adding device, including vaporization chamber subassembly and solenoid valve subassembly that link to each other in proper order. Vaporization chamber subassembly includes vaporization chamber and the plug post of being worn in its inside, and the clearance that supplies liquid to pass between both. Be equipped with the heating rod that surrounds the clearance and arranges in the vaporization chamber. The utility model discloses through solenoid valve accurate control liquid inlet, utilize annular clearance and even heating promotion vaporization effect and control precision, and the vaporization chamber adopts the pressure bearing structure and can bear the vacuum environment, and adopt detachable connection between each subassembly and be convenient for dismouting debugging.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, and in particular to an ethylene oxide vaporization and addition device. Background Technology

[0002] The development of ethylene oxide sterilization resistance meters stems from the need for standardization and quality control of ethylene oxide sterilization processes. As the medical device industry increasingly demands reliable sterilization results, there is a need to accurately measure the D-value (time required to kill 90% of microorganisms) of biological indicators to verify the effectiveness of the sterilization process. The equipment simulates reagent sterilization conditions in a precisely controlled ethylene oxide sterilization environment to test the resistance characteristics of biological indicators. The equipment can precisely control key parameters such as temperature, humidity, ethylene oxide concentration, and exposure time, providing standardized conditions for the resistance determination of biological indicators. Modern ethylene oxide sterilization resistance meters are developing towards automation and digitalization, featuring one-button heating, automatic leak detection, automatic sterilization, and automatic residue removal. With continuously improving data traceability and real-time monitoring capabilities, more reliable technical support is provided for the verification and validation of the sterilization process.

[0003] However, when current ethylene oxide vaporization equipment is integrated into ethylene oxide sterilization resistance instruments that require a pre-vacuuming process, the following problems usually still exist: ① Existing vaporization chamber components are often not specifically designed for vacuum environments, and their structural strength and overall sealing are insufficient. When connected to a sterilization chamber with a vacuum level of less than 10 kPa, there is a risk of deformation or leakage. ② The existing vaporization chamber is directly connected to the liquid inlet pipe, which makes it impossible to accurately control the amount of ethylene oxide introduced, and thus makes it difficult to accurately control the concentration and temperature. ③ The sealing performance of the vaporization chamber is generally poor, making it difficult to quickly cut off the supply of ethylene oxide when leakage occurs.

[0004] ④ The core components inside the vaporization chamber are fixed in a complicated way, and the connection with the external valve body is mostly integrated, which is not convenient for disassembly, maintenance and debugging. Utility Model Content

[0005] The purpose of this invention is to provide a device that not only improves the vaporization concentration and temperature control accuracy of ethylene oxide, but also reliably withstands vacuum environments and is easy to disassemble and debug.

[0006] To solve the above-mentioned technical problems, this utility model provides an ethylene oxide vaporization and addition device, including a vaporization chamber assembly and a solenoid valve assembly connected in sequence. The vaporization chamber assembly includes a vaporization chamber and a plug inserted inside the vaporization chamber. There is a gap between the plug and the vaporization chamber so that liquid at the solenoid valve assembly can pass through the gap into the vaporization chamber. A plurality of heating rods are arranged circumferentially inside the vaporization chamber, and the plurality of heating rods are arranged around the circumference of the gap.

[0007] Furthermore, a liquid inlet channel is provided extending from the side of the vaporization chamber near the solenoid valve assembly, and the liquid inlet channel is connected to the gap inside the vaporization chamber.

[0008] Furthermore, a temperature sensor is connected to the vaporization chamber to detect the temperature inside the vaporization chamber.

[0009] Furthermore, a pressure plate is detachably provided on the side of the vaporization chamber away from the solenoid valve assembly, and the plunger is connected to the pressure plate.

[0010] Furthermore, the solenoid valve assembly includes a solenoid valve and a first adapter connected between the solenoid valve and the vaporization chamber, so that when the solenoid valve is opened, the liquid sequentially enters the vaporization chamber through the solenoid valve and the first adapter.

[0011] Furthermore, an extension rod is connected between the first adapter and the solenoid valve to increase the distance between the solenoid valve and the vaporization chamber.

[0012] Furthermore, the solenoid valve is connected to a second adapter for docking with the inlet pipe on the side away from the first adapter, and the second adapter is connected to the extension rod.

[0013] Furthermore, the vaporization chamber is a sealed pressure-bearing structure used to connect to a sterilization chamber in a vacuum environment and can withstand a vacuum pressure of less than 10 kPa.

[0014] Furthermore, the vaporization chamber assembly and the solenoid valve assembly, as well as the interior of the solenoid valve assembly, are connected by detachable connectors.

[0015] Furthermore, the pressure plate is connected to the vaporization chamber via detachable fasteners to facilitate the removal of the plunger.

[0016] The beneficial effects of this utility model are as follows: High control precision: The on- and off-flow of ethylene oxide liquid is precisely controlled by the solenoid valve assembly, which allows for precise adjustment of the ethylene oxide flow rate. After the ethylene oxide enters the vaporization chamber, it is uniformly heated by the circumferentially distributed heating rods. Furthermore, the gap formed between the plug and the vaporization chamber increases the contact area of ​​ethylene oxide in the vaporization chamber, thereby increasing the heat absorption area and improving the vaporization effect.

[0017] Strong vacuum adaptability: The vaporization chamber component adopts a closed pressure-bearing structure design, which can be directly and reliably connected to the sterilization chamber in a vacuum environment, and can withstand vacuum pressure of less than 10 kPa without leakage or deformation, thus meeting the requirements of the ethylene oxide sterilization resistance instrument for the pre-vacuum process.

[0018] Easy to disassemble and debug: The vaporization chamber and the solenoid valve assembly adopt a modular, detachable connection (such as adapters and extension rods). At the same time, a detachable pressure plate is set on the side of the vaporization chamber away from the solenoid valve to fix the plunger. This design makes the installation, maintenance, and replacement and debugging of the core component (plunger) of the entire device very simple, improving the maintainability and flexibility of the equipment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Figure 2 This is a schematic diagram showing the connection between the vaporization chamber assembly and the solenoid valve assembly in this utility model.

[0021] Figure 3 This is a schematic diagram of the pressure plate position of the vaporization chamber component in this utility model.

[0022] Figure 4 This is a schematic diagram of the liquid inlet channel of the vaporization chamber component in this utility model.

[0023] Figure 5 This is an internal schematic diagram of the vaporization chamber component in this utility model.

[0024] Figure 6 This is a schematic diagram of the structure of the solenoid valve assembly in this utility model.

[0025] Reference numerals: 1. Vaporization chamber assembly; 11. Vaporization chamber; 12. Heating rod; 13. Temperature sensor; 14. Plug; 15. Pressure plate; 16. Liquid inlet channel; 2. Solenoid valve assembly; 21. First adapter; 22. Extension rod; 23. Solenoid valve; 24. Second adapter. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0027] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as a limitation of this utility model.

[0028] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0029] like Figures 1-6 The present invention provides an ethylene oxide vaporization and addition device, comprising a vaporization chamber assembly 1 and a solenoid valve assembly 2 connected in sequence. The vaporization chamber assembly 1 includes a vaporization chamber 11 and a plug 14 passing through the interior of the vaporization chamber 11. There is a gap between the plug 14 and the vaporization chamber 11 so that the liquid at the solenoid valve assembly 2 passes through the gap into the vaporization chamber 11. A plurality of heating rods 12 are arranged circumferentially inside the vaporization chamber 11, and the plurality of heating rods 12 are arranged around the circumference of the gap.

[0030] The vaporization chamber assembly 1 is the main body of the entire ethylene oxide vaporization heating device, providing the space for the vaporization and heating of ethylene oxide. Its internal cavity is filled with insulating sand to ensure temperature stability in the intermediate heating section. The solenoid valve assembly 2 is used to control the injection of ethylene oxide. Preferably, the vaporization chamber 11 is made of high-strength stainless steel and is a sealed welded pressure-bearing shell structure, ensuring that it can stably withstand the negative pressure (typically below 10 kPa) generated by the connected sterilization chamber during vacuuming.

[0031] Preferably, the vaporization chamber assembly 1 and the solenoid valve assembly 2, as well as the interior of the solenoid valve assembly 2, are connected by detachable connectors.

[0032] Furthermore, the precise control of the flow of ethylene oxide liquid through the solenoid valve assembly allows for accurate adjustment of the ethylene oxide flow rate. After the ethylene oxide enters the vaporization chamber, it is uniformly heated by the circumferentially distributed heating rods. Moreover, the gap formed between the plug and the vaporization chamber increases the contact area of ​​ethylene oxide in the vaporization chamber, thereby increasing the heat absorption area and improving the vaporization effect.

[0033] Specifically, the outer diameter of the plug is smaller than the inner diameter of the vaporization chamber, which creates an annular gap between the plug and the inner wall of the vaporization chamber. The gap has a long and narrow cavity structure to increase the heating area of ​​the liquid as it passes through the vaporization chamber.

[0034] The heating rod can be electrically heated.

[0035] Preferably, the vaporization chamber 11 is provided with a liquid inlet channel 16 extending from the side near the solenoid valve assembly 2, and the liquid inlet channel 16 is connected to the gap inside the vaporization chamber 11.

[0036] Specifically, the liquid inlet channel is connected to the vaporization chamber, allowing ethylene oxide liquid to enter the annular gap through the liquid inlet channel. Heating rods distributed circumferentially along the gap can uniformly heat the liquid flowing through the gap, improving the vaporization effect.

[0037] Preferably, a temperature sensor 13 is connected to the vaporization chamber 11 to detect the temperature inside the vaporization chamber 11.

[0038] Specifically, the temperature sensor detects the internal temperature in real time and feeds it back to the control system to adjust the heating power of the heating rod, ensuring that the vaporization process proceeds stably.

[0039] Preferably, a pressure plate 15 is detachably provided on the side of the vaporization chamber 11 away from the solenoid valve assembly 2, and the plunger 14 is connected to the pressure plate 15.

[0040] Specifically, the detachable design of the pressure plate facilitates the installation and positioning of the plunger, while ensuring the stable fixation of the plunger in the vaporization chamber, avoiding positional displacement caused by vibration or thermal expansion and contraction, and further ensuring the uniformity of the annular gap.

[0041] The pressure plate can be connected to the outside of the vaporization chamber via bolts or other connecting parts.

[0042] Preferably, the pressure plate 15 is connected to the vaporization chamber 11 by a detachable fastener to facilitate the installation, removal and maintenance of the plunger 14.

[0043] Preferably, the solenoid valve assembly 2 includes a solenoid valve 23 and a first adapter 21 connected between the solenoid valve 23 and the vaporization chamber 11, so that when the solenoid valve 23 is opened, the liquid enters the vaporization chamber 11 sequentially through the solenoid valve 23 and the first adapter 21.

[0044] Specifically, the solenoid valve controls the on / off path of ethylene oxide inlet. By controlling the on / off time, the amount of ethylene oxide inlet is controlled, allowing the liquid to flow precisely into the annular gap in the vaporization chamber, ensuring a continuous and stable vaporization process. The first adapter is made of corrosion-resistant metal material, which can effectively withstand the chemical corrosion of ethylene oxide and the high-temperature environment, extending the service life of the component.

[0045] Preferably, an extension rod 22 is connected between the first adapter 21 and the solenoid valve 23 to increase the distance between the solenoid valve 23 and the vaporization chamber 11, thereby preventing interference between the solenoid valve 23 and the vaporization chamber 11.

[0046] Specifically, the extension rod can effectively reduce the risk of the solenoid valve being affected by the high temperature of the vaporization chamber, improve the stability and life of the valve body, and facilitate the overall system layout and maintenance.

[0047] Preferably, the solenoid valve 23 is connected to a second adapter 24 for docking with the inlet pipe on the side away from the first adapter 21, and the second adapter 24 is connected to the extension rod 22.

[0048] Specifically, the inlet pipe is connected to the solenoid valve via an extension rod to achieve a stable connection between the inlet pipe and the solenoid valve, ensuring the sealing and reliability of the liquid delivery channel; the second adapter is also made of corrosion-resistant materials to adapt to the working environment of ethylene oxide.

[0049] Furthermore, the detachable pressure plate 15, the first adapter 21, the extension rod 22, and the second adapter 24 together form a modular connection system. This design allows the entire vaporization addition device to be easily disassembled and reassembled or maintained in sections. When it is necessary to clean the vaporization chamber or replace the plunger 14, only the pressure plate 15 needs to be removed, which greatly facilitates the debugging and maintenance work.

[0050] This utility model is not limited to the above-described preferred embodiments. Anyone can derive other forms of products under the guidance of this utility model. However, regardless of any changes made in their shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this utility model.

Claims

1. An ethylene oxide vaporization and addition device, characterized in that: The device includes a vaporization chamber assembly (1) and a solenoid valve assembly (2) connected in sequence. The vaporization chamber assembly (1) includes a vaporization chamber (11) and a plug (14) inserted inside the vaporization chamber (11). There is a gap between the plug (14) and the vaporization chamber (11) so that the liquid at the solenoid valve assembly (2) passes through the gap into the vaporization chamber (11). A plurality of heating rods (12) are arranged circumferentially inside the vaporization chamber (11), and the plurality of heating rods (12) are arranged around the gap.

2. The ethylene oxide vaporization and addition device according to claim 1, characterized in that: The vaporization chamber (11) has a liquid inlet channel (16) extending from the side near the solenoid valve assembly (2), and the liquid inlet channel (16) is connected to the gap inside the vaporization chamber (11).

3. The ethylene oxide vaporization and addition device according to claim 1, characterized in that: A temperature sensor (13) is connected to the vaporization chamber (11) to detect the temperature inside the vaporization chamber (11).

4. The ethylene oxide vaporization and addition device according to claim 1, characterized in that: A pressure plate (15) is detachably provided on the side of the vaporization chamber (11) away from the solenoid valve assembly (2), and the plunger (14) is connected to the pressure plate (15).

5. The ethylene oxide vaporization and addition device according to claim 1, characterized in that: The solenoid valve assembly (2) includes a solenoid valve (23) and a first adapter (21) connected between the solenoid valve (23) and the vaporization chamber (11) so that when the solenoid valve (23) is opened, the liquid enters the vaporization chamber (11) sequentially through the solenoid valve (23) and the first adapter (21).

6. The ethylene oxide vaporization and addition device according to claim 5, characterized in that: An extension rod (22) is connected between the first adapter (21) and the solenoid valve (23) to increase the distance between the solenoid valve (23) and the vaporization chamber (11).

7. The ethylene oxide vaporization and addition device according to claim 6, characterized in that: The solenoid valve (23) is connected to a second adapter (24) for docking with the inlet pipe on the side away from the first adapter (21), and the second adapter (24) is connected to the extension rod (22).

8. The ethylene oxide vaporization and addition device according to claim 1, characterized in that: The vaporization chamber (11) is a sealed pressure-bearing structure used to connect to the sterilization chamber in a vacuum environment and can withstand a vacuum pressure of less than 10 kPa.

9. The ethylene oxide vaporization and addition device according to claim 5, characterized in that: The vaporization chamber assembly (1) and the solenoid valve assembly (2), as well as the interior of the solenoid valve assembly (2), are connected by detachable connectors.

10. The ethylene oxide vaporization and addition device according to claim 4, characterized in that: The pressure plate (15) is connected to the vaporization chamber (11) by a detachable fastener to facilitate the removal of the plunger (14).

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