A cylinder isolation device for sensors of an ethylene oxide sterilization device

Abstract

The present invention discloses a cylinder isolation device for a sensor of an ethylene oxide sterilization device, which includes a housing, two cylinders and two fixed flanges. The cylinders are fixedly connected to the top end of the housing through the fixed flanges. A sealing ring corresponding to the cylinders is arranged on the inner top wall of the housing. A cylinder piston rod is arranged inside the cylinder. The top end of the cylinder piston rod penetrates through the cylinder and is provided with a sensor structure. The bottom end of the cylinder piston rod sequentially penetrates through the cylinder, the housing and the sealing ring and is fixedly connected with a bottom plate. A first sealing structure is arranged between the sealing ring and the bottom plate. By utilizing the principle characteristics of the cylinder, the invention directly reforms the two ends of the cylinder to form an isolation chamber and a sealing function, avoiding the direct contact between the monitoring instrument and ethylene oxide, ensuring that the measurement accuracy of the monitoring instrument is not affected by the corrosion of ethylene oxide, prolonging the service life of the monitoring instrument, and at the same time greatly simplifying the mechanism of the isolation device and reducing the manufacturing cost of the isolation device.

Description

Technical Field

[0001] The present invention belongs to the technical field of sterilizer equipment, and more specifically, it relates to a cylinder isolation device for sensors of an ethylene oxide sterilization device. Background Art

[0002] The ethylene oxide sterilization device is a key device for disposable sterile medical device production enterprises. Its installation operation and use management have special requirements. Ethylene oxide is used as a sterilizing agent. Ethylene oxide is a broad-spectrum sterilizing agent that can kill various microorganisms at room temperature, including spores, mycobacterium tuberculosis, bacteria, viruses, fungi, etc.

[0003] During the sterilization process of the ethylene oxide sterilizer, some monitoring instruments (such as temperature sensors and humidity sensors) are directly in contact with ethylene oxide, resulting in the loss of authenticity of the sensor measurement values. At the same time, ethylene oxide will corrode the sensor measurement chip (especially the humidity sensing), causing damage to the sensor. In view of this phenomenon, monitoring instruments (such as temperature sensors and humidity sensors) need to avoid contact with ethylene oxide, so they are isolated from the sterilizer wall at the necessary stage. Therefore, those skilled in the art have provided a cylinder isolation device for sensors of an ethylene oxide sterilization device to solve the problems raised in the above background art. Summary of the Invention

[0004] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a cylinder isolation device for sensors of an ethylene oxide sterilization device. By using the principle characteristics of the cylinder, direct transformation is carried out at both ends of the cylinder to form an isolation chamber and a sealing function, avoiding the direct contact between the monitoring instrument and ethylene oxide, ensuring that the measurement accuracy of the monitoring instrument is not affected by ethylene oxide corrosion, extending the service life of the monitoring instrument, and at the same time greatly simplifying the structure of the isolation device and reducing the manufacturing cost of the isolation device.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A cylinder isolation device for sensors of an ethylene oxide sterilization device, comprising a housing, two cylinder bodies and two fixed flanges. The cylinder bodies are fixedly connected to the top end of the housing through the fixed flanges. A sealing ring corresponding to the cylinder bodies is provided on the inner top wall of the housing. A cylinder piston rod is arranged in the cylinder body. The top end of the cylinder piston rod penetrates through the cylinder body and is provided with a sensor structure. The bottom end of the cylinder piston rod sequentially penetrates through the cylinder body, the housing and the sealing ring and is fixedly connected with a bottom plate. A first sealing structure is arranged between the sealing ring and the bottom plate. A second sealing structure is arranged at the bottom end of the sealing ring. A third sealing structure is arranged on the inner wall of the sealing ring. A switch structure is arranged on the inner wall of the cylinder body;

[0007] Through the above technical solution, in the test state, the cylinder block is fixed to the outer shell through the fixed flange, and the sensor structure is arranged on the piston rod of the cylinder. When the upper part of the cylinder block is ventilated, the piston rod of the cylinder descends, the bottom plate and the sealing ring are separated, and the switch structure conducts induction control. After moving to a suitable position, the through ventilation groove and the sensor probe are exposed inside the device. The sensor probe is communicated with the inside of the device through the through ventilation groove and is in the same environment, and the test related to the requirements can be carried out; in the isolation state, the bottom of the cylinder block is ventilated, the piston rod of the cylinder ascends, the first sealing structure is completed and fitted, and at the same time, it will drive the second sealing structure and the third sealing structure to operate synchronously. When the sealing ring and the bottom plate are closely fitted, the three sealing structures will also complete the sealing operation, and the through ventilation groove and the sensor probe will be lifted and isolated from the inside of the device.

[0008] Further, the sensor structure includes a sensor connection part and a sensor probe. The sensor connection part is arranged at the top end of the piston rod of the cylinder. A through ventilation groove is opened at the lower end surface of the piston rod of the cylinder. The sensor probe is arranged in the through ventilation groove;

[0009] Through the above technical solution, the sensor probe and the through ventilation groove cooperate with each other, and the isolation and test states can be completed through the cooperation between the cylinder block and the piston rod of the cylinder, making the test more convenient. At the same time, it plays a role in protecting the sensor structure, improving the detection accuracy and prolonging the service life of the sensor structure.

[0010] Further, the first sealing structure includes a sealing plate. The sealing plate is fixedly installed at the top end of the bottom plate. A ring is arranged at the top end of the sealing plate. A first sealing gasket is arranged at the top end of the ring. A sealing groove is opened at the bottom end of the sealing ring. An installation groove communicated with the sealing groove is opened inside the sealing ring. A first spring is fixedly connected to the inner top wall of the installation groove. The bottom end of the first spring is fixedly connected to a moving ring;

[0011] Through the above technical solution, when the piston rod of the cylinder moves upward, the bottom plate will drive the sealing plate to move upward synchronously. After the ring passes through the sealing groove and enters the installation groove, the first sealing gasket will first contact the moving ring, and the first spring will be bent under force. When the piston rod of the cylinder continues to rise, the sealing plate will complete the fitting with the sealing groove, and the first sealing operation between the sealing ring and the bottom plate will be completed, avoiding damage to the sensor structure caused by ethylene oxide.

[0012] Further, the second sealing structure includes a piston plate and two first air bags. Both of the two first air bags are arranged on the inner top wall of the installation groove. A bottom groove is opened at the bottom end of the sealing ring. The piston plate is arranged in the bottom groove. A second spring is evenly distributed between the inner top wall of the bottom groove and the piston plate. A first air pipe is arranged between one of the first air bags and the bottom groove;

[0013] Through the above technical solution, when the movable ring rises, the first airbag will be squeezed, and the gas inside one of the first airbags will enter the upper end of the bottom groove through the first air pipe. The gas pushes the piston plate to move downward, and the second spring is stretched by force to complete the second sealing operation between the sealing ring and the bottom plate, avoiding ethylene oxide. The gas enters the sealing ring from the connection between the sealing ring and the bottom plate.

[0014] Further, the third sealing structure includes a second airbag, the inner wall of the sealing ring is provided with an annular groove, the second airbag is provided in the annular groove, and a second air delivery pipe is provided between the second airbag and another of the first airbags;

[0015] Through the above technical solution, during the rising process of the moving ring, the two first airbags will be squeezed, and the other first airbag will transport the gas to the second airbag through the second air pipe. The air pressure inside the second airbag will increase, and a collision will occur. It will automatically wrap around the lower end of the cylinder piston rod surface, completing the third sealing operation and further improving the isolation effect.

[0016] Furthermore, the switch structure includes an upward magnetic travel switch and a downward magnetic travel switch, and the upward magnetic travel switch and the downward magnetic travel switch are vertically distributed on one side of the inner wall of the cylinder body;

[0017] Through the above technical solution, the upward magnetic travel switch is used during isolation operations to limit the upper end movement position of the cylinder piston rod, and the downward magnetic travel switch is used during testing operations to limit the descending position of the cylinder piston rod.

[0018] Further, the sealing plate is in the shape of a hollow truncated cone, and the sealing plate matches the sealing groove;

[0019] Through the above technical solution, the hollow frustum-shaped sealing plate and the sealing groove are used in combination to further enhance the performance between the bottom plate and the sealing ring, thereby improving the sealing effect.

[0020] Furthermore, a second sealing gasket is provided at the bottom end of the piston plate, the second sealing gasket is annular, and the second sealing gasket is a rubber material component;

[0021] Through the above technical solution, when the piston plate moves downward, the second sealing gasket will contact the top of the bottom plate, thereby enhancing the sealing performance between the piston plate and the bottom plate.

[0022] Furthermore, a heat-insulating layer is provided around the shell, and the fixing flange is fixedly installed on the surface of the heat-insulating layer;

[0023] Through the above technical solution, the insulation layer plays a role in insulating the outer shell, reducing energy loss and lowering production costs.

[0024] In summary, the present invention has the following beneficial effects:

[0025] 1. During the test state, the cylinder block is fixed to the outer shell through the fixed flange, and the sensor structure is arranged on the piston rod of the cylinder. When the upper part of the cylinder block is ventilated, the piston rod of the cylinder moves downward, the bottom plate and the sealing ring are separated, and the switch structure performs induction control. After moving to a suitable position, the through ventilation groove and the sensor probe are exposed inside the equipment. The sensor probe is communicated with the inside of the equipment through the through ventilation groove and is in the same environment, and tests related to the requirements can be carried out; in the isolation state, the bottom of the cylinder block is ventilated, the piston rod of the cylinder moves upward, and the through ventilation groove and the sensor probe are lifted and isolated from the inside of the equipment. This method utilizes the principle characteristics of the cylinder, directly modifies both ends of the cylinder to form an isolation chamber and a sealing function, avoiding the direct contact between the monitoring instrument and ethylene oxide, ensuring that the measurement accuracy of the monitoring instrument is not affected by the corrosion of ethylene oxide, extending the service life of the monitoring instrument, and at the same time greatly simplifying the mechanism of the isolation device and reducing the manufacturing cost of the isolation device.

[0026] 2. By setting the first sealing structure, the second sealing structure and the third sealing structure, when the piston rod of the cylinder moves upward, the bottom plate will drive the sealing plate to move upward synchronously. After the circular ring passes through the sealing groove and enters the installation groove, the first sealing gasket will first contact the moving ring, and the first spring will be bent under force. As the piston rod of the cylinder continues to rise, the sealing plate will complete the fitting with the sealing groove, completing the first sealing operation between the sealing ring and the bottom plate, avoiding damage to the sensor structure caused by ethylene oxide. At the same time, when the moving ring rises, it will squeeze the first airbag. The gas inside one of the first airbags will enter the upper end of the bottom groove through the first air pipe, and the gas will push the piston plate downward, and the second spring will be stretched under force, completing the second sealing operation between the sealing ring and the bottom plate, avoiding ethylene oxide gas from entering the sealing ring from the connection between the completed sealing ring and the bottom plate. During this process, both first airbags will be squeezed, and the other first airbag will transport the gas to the second airbag through the second air pipe. The air pressure inside the second airbag increases and collides, and it will automatically wrap around the lower end of the piston rod of the cylinder, completing the third sealing operation and further improving the isolation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is the perspective view of this embodiment;

[0028] Figure 2 is the schematic structural diagram of the isolation state of the device in this embodiment;

[0029] Figure 3 is the schematic structural diagram of the test state of the device in this embodiment;

[0030] Figure 4 is the connection schematic diagram of the sealing ring and the sealing plate of this embodiment;

[0031] Figure 5 is a connection schematic diagram of the first sealing structure, the second sealing structure, and the third sealing structure of this embodiment;

[0032] Figure 6 is a connection schematic diagram of the sealing ring and the first sealing structure of this embodiment;

[0033] Figure 7 is a connection schematic diagram of the cylinder block and the switch structure of this embodiment.

[0034] Explanation of reference numerals: 1. Outer shell; 101. Thermal insulation layer; 2. Cylinder block; 3. Fixed flange; 4. Cylinder piston rod; 5. Through ventilation groove; 6. Sensor structure; 601. Sensor connection part; 602. Sensor probe; 7. Sealing ring; 701. Installation groove; 702. Bottom groove; 703. Circular ring groove; 704. Sealing groove; 8. Bottom plate; 9. First sealing structure; 901. Sealing plate; 902. Circular ring; 903. First sealing gasket; 904. Moving ring; 905. First spring; 10. Second sealing structure; 1001. First airbag; 1002. First air pipe; 1003. Second spring; 1004. Piston plate; 1005. Second sealing gasket; 11. Third sealing structure; 1101. Second airbag; 1102. Second air pipe; 12. Switch structure; 1201. Upward magnetic travel switch; 1202. Downward magnetic travel switch. Detailed implementation manners

[0035] Embodiment:

[0036] The following further elaborates on the present invention in conjunction with the attached Figure 1-7 drawings.

[0037] A cylinder isolation device for a sensor of an ethylene oxide sterilization device, comprising a housing 1, two cylinder bodies 2 and two fixed flanges 3. The cylinder bodies 2 are fixedly connected to the top end of the housing 1 through the fixed flanges 3. A sealing ring 7 corresponding to the cylinder bodies 2 is arranged on the inner top wall of the housing 1. A cylinder piston rod 4 is arranged in the cylinder body 2. The top end of the cylinder piston rod 4 penetrates through the cylinder body 2 and is provided with a sensor structure 6. The bottom end of the cylinder piston rod 4 sequentially penetrates through the cylinder body 2, the housing 1 and the sealing ring 7 and is fixedly connected with a bottom plate 8. A first sealing structure 9 is arranged between the sealing ring 7 and the bottom plate 8. A second sealing structure 10 is arranged at the bottom end of the sealing ring 7. A third sealing structure 11 is arranged on the inner wall of the sealing ring 7. A switch structure 12 is arranged on the inner wall of the cylinder body 2. In the test state, the cylinder body 2 is fixed on the housing 1 through the fixed flange 3, and the sensor structure 6 is arranged on the cylinder piston rod 4. When the upper part of the cylinder body 2 is ventilated, the cylinder piston rod 4 moves downward, and the bottom plate 8 and the sealing ring 7 are separated. The switch structure 12 performs induction control. After moving to a suitable position, the through ventilation groove 5 and the sensor probe 602 are exposed inside the device. The sensor probe 602 is communicated with the inside of the device through the through ventilation groove 5 and is in the same environment, and tests related to the requirements can be carried out. In the isolation state, the bottom of the cylinder body 2 is ventilated, the cylinder piston rod 4 moves upward, the first sealing structure 9 is completed and fitted, and at the same time, it will drive the second sealing structure 10 and the third sealing structure 11 to operate synchronously. When the sealing ring 7 and the bottom plate 8 are closely fitted, the three sealing structures will also complete the sealing operation, and the through ventilation groove 5 and the sensor probe 602 will be lifted and isolated from the inside of the device. (Both of the two detection devices are arranged on the top end of the housing 1 and are diagonally distributed to improve the accuracy of the detection results) The sensor structure 6 includes a sensor connection part 601 and a sensor probe 602. The sensor connection part 601 is arranged at the top end of the cylinder piston rod 4. A through ventilation groove 5 is opened at the lower end of the surface of the cylinder piston rod 4. The sensor probe 602 is arranged in the through ventilation groove 5. The sensor probe 602 and the through ventilation groove 5 cooperate with each other, and can complete the isolation and test states through the cooperation between the cylinder body 2 and the cylinder piston rod 4, making the test more convenient. At the same time, it plays a role in protecting the sensor structure 6, improving the detection accuracy and prolonging the service life of the sensor structure 6 (at the same time, the sensor structure 6 can be freely selected according to the specific aspects to be detected, such as a pressure sensor, a temperature sensor, etc.).

[0038] The first sealing structure 9 includes a sealing plate 901 which is fixedly installed at the top end of the bottom plate 8. A circular ring 902 is arranged at the top end of the sealing plate 901, and a first sealing gasket 903 is arranged at the top end of the circular ring 902. A sealing groove 704 is formed at the bottom end of the sealing ring 7, and an installation groove 701 communicating with the sealing groove 704 is formed inside the sealing ring 7. The inner top wall of the installation groove 701 is fixedly connected with a first spring 905, and the bottom end of the first spring 905 is fixedly connected with a moving ring 904. When the piston rod 4 of the air cylinder moves upward, the bottom plate 8 will drive the sealing plate 901 to move upward synchronously. After the circular ring 902 passes through the sealing groove 704 and enters the installation groove 701, the first sealing gasket 903 will first contact the moving ring 904, and the first spring 905 will be bent under force. When the piston rod 4 of the air cylinder continues to rise, the sealing plate 901 will complete the fitting with the sealing groove 704, completing the first sealing operation between the sealing ring 7 and the bottom plate 8, and preventing ethylene oxide from damaging the sensor structure 6. The second sealing structure 10 includes a piston plate 1004 and two first air bags 1001. Both of the two first air bags 1001 are arranged on the inner top wall of the installation groove 701. A bottom groove 702 is formed at the bottom end of the sealing ring 7, and the piston plate 1004 is arranged in the bottom groove 702. A plurality of second springs 1003 are evenly distributed between the inner top wall of the bottom groove 702 and the piston plate 1004. A first air pipe 1002 is arranged between one of the first air bags 1001 and the bottom groove 702. When the moving ring 904 rises, it will squeeze the first air bag 1001. The gas inside one of the first air bags 1001 will enter the upper end of the bottom groove 702 through the first air pipe 1002, and the gas will push the piston plate 1004 to move downward, and the second springs 1003 will be stretched under force, completing the second sealing operation between the sealing ring 7 and the bottom plate 8, and preventing ethylene oxide gas from entering the sealing ring 7 from the connection between the sealing ring 7 and the bottom plate 8. The third sealing structure 11 includes a second air bag 1101. A circular ring groove 703 is arranged on the inner wall of the sealing ring 7, and the second air bag 1101 is arranged in the circular ring groove 703. A second air pipe 1102 is arranged between the second air bag 1101 and the other first air bag 1001. During the rising process of the moving ring 904, both of the two first air bags 1001 will be squeezed. The other first air bag 1001 will transport the gas to the second air bag 1101 through the second air pipe 1102. The air pressure inside the second air bag 1101 increases and it will collide and automatically wrap around the lower end surface of the piston rod 4 of the air cylinder, completing the third sealing operation and further improving the isolation effect.

[0039] The switch structure 12 includes an upward magnetic travel switch 1201 and a downward magnetic travel switch 1202. The upward magnetic travel switch 1201 and the downward magnetic travel switch 1202 are vertically distributed on one side of the inner wall of the cylinder block 2. The upward magnetic travel switch 1201 is used during isolation operation to limit the moving position of the upper end of the cylinder piston rod 4. The downward magnetic travel switch 1202 is used during test operation to limit the descending position of the cylinder piston rod 4. The sealing plate 901 is in the shape of a hollow frustum of a cone and matches the sealing groove 704. The hollow frustum-shaped sealing plate 901 and the sealing groove 704 are used in combination to further enhance the performance between the bottom plate 8 and the sealing ring 7, thereby improving the sealing effect. A second sealing gasket 1005 is provided at the bottom end of the piston plate 1004. The second sealing gasket 1005 is in a circular ring shape and is a rubber material component, which strengthens the sealing performance between the piston plate 1004 and the bottom plate 8. Heat insulation layers 101 are provided around the outer shell 1, and the fixed flange 3 is fixedly installed on the surface of the heat insulation layer 101.

[0040] Working principle: In the test state, the cylinder block 2 is fixed to the outer shell 1 through the fixed flange 3, and the sensor structure 6 is arranged on the cylinder piston rod 4. When the upper part of the cylinder block 2 is ventilated, the cylinder piston rod 4 descends, the bottom plate 8 and the sealing ring 7 are separated, and the switch structure 12 performs induction control. After moving to a suitable position, the through ventilation groove 5 and the sensor probe 602 are exposed inside the equipment. The sensor probe 602 is connected to the inside of the equipment through the through ventilation groove 5 and is in the same environment, and tests related to the requirements can be carried out; in the isolation state, the bottom of the cylinder block 2 is ventilated, the cylinder piston rod 4 ascends, the bottom plate 8 will drive the sealing plate 901 to move upward synchronously, the circular ring 902 passes through the sealing groove 704 and enters the installation groove 701, the first sealing gasket 903 will first contact the moving ring 904, and the first spring 905 will be bent under force. The cylinder piston rod 4 continues to rise, and the sealing plate 901 will complete the fitting with the sealing groove 704, completing the first sealing operation between the sealing ring 7 and the bottom plate 8, avoiding damage to the sensor structure 6 by ethylene oxide. At the same time, when the moving ring 904 rises, it will squeeze the first airbag 1001. The gas inside one of the first airbags 1001 will enter the upper end of the bottom groove 702 through the first air pipe 1002, and the gas will push the piston plate 1004 to move downward, and the second spring 1003 will be stretched under force, completing the second sealing operation between the sealing ring 7 and the bottom plate 8, avoiding ethylene oxide gas from entering the sealing ring 7 from the connection between the sealing ring 7 and the bottom plate 8. During this process, both first airbags 1001 will be squeezed, and the other first airbag 1001 will transport the gas to the second airbag 1101 through the second air pipe 1102. The air pressure inside the second airbag 1101 increases and collides, and it will automatically wrap around the lower end of the surface of the cylinder piston rod 4, completing the third sealing operation, further improving the isolation effect, and raising the through ventilation groove 5 and the sensor probe 602 from inside the equipment for isolation.

[0041] This specific embodiment is only an interpretation of the present invention and is not a limitation thereof. After reading this specification, those skilled in the art may make modifications to this embodiment that do not contribute creatively, but as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A cylinder isolation device for a sensor of an ethylene oxide sterilization device, comprising a housing (1), two cylinder bodies (2) and two fixed flanges (3), characterized in that: The cylinder block (2) is fixedly connected to the top end of the outer shell (1) through the fixed flange (3). A sealing ring (7) corresponding to the cylinder block (2) is provided on the inner top wall of the outer shell (1). A cylinder piston rod (4) is arranged inside the cylinder block (2). The top end of the cylinder piston rod (4) penetrates through the cylinder block (2) and is provided with a sensor structure (6). The sensor structure (6) includes a sensor connection part (601) and a sensor probe (602). The sensor connection part (601) is arranged at the top end of the cylinder piston rod (4). A through ventilation groove (5) is opened at the lower end of the surface of the cylinder piston rod (4). The sensor probe (602) is arranged in the through ventilation groove (5). The bottom end of the cylinder piston rod (4) sequentially penetrates through the cylinder block (2), the outer shell (1) and the sealing ring (7) and is fixedly connected with a bottom plate (8). A first sealing structure (9) is arranged between the sealing ring (7) and the bottom plate (8). The first sealing structure (9) includes a sealing plate (901). The sealing plate (901) is fixedly installed at the top end of the bottom plate (8). A circular ring (902) is arranged at the top end of the sealing plate (901). A first sealing gasket (903) is arranged at the top end of the circular ring (902). A sealing groove (704) is opened at the bottom end of the sealing ring (7). An installation groove (701) communicated with the sealing groove (704) is opened inside the sealing ring (7). A first spring (905) is fixedly connected to the inner top wall of the installation groove (701). The bottom end of the first spring (905) is fixedly connected with a moving ring (904). A second sealing structure (10) is arranged at the bottom end of the sealing ring (7). The second sealing structure (10) includes a piston plate (1004) and two first air bags (1001). Both of the two first air bags (1001) are arranged on the inner top wall of the installation groove (701). A bottom groove (702) is opened at the bottom end of the sealing ring (7). The piston plate (1004) is arranged in the bottom groove (702). A uniformly distributed second spring (1003) is arranged between the inner top wall of the bottom groove (702) and the piston plate (1004). A first air pipe (1002) is arranged between one of the first air bags (1001) and the bottom groove (702). A third sealing structure (11) is arranged on the inner wall of the sealing ring (7). The third sealing structure (11) includes a second air bag (1101). A circular ring groove (703) is arranged on the inner wall of the sealing ring (7). The second air bag (1101) is arranged in the circular ring groove (703). A second air pipe (1102) is arranged between the second air bag (1101) and the other first air bag (1001). A switch structure (12) is arranged on the inner wall of the cylinder block (2). The switch structure (12) includes an upward magnetic travel switch (1201) and a downward magnetic travel switch (1202).The upward magnetic travel switch (1201) and the downward magnetic travel switch (1202) are vertically distributed on one side of the inner wall of the cylinder block (2).

2. The cylinder isolation device for a sensor of an ethylene oxide sterilization device according to claim 1, characterized in that: The sealing plate (901) is in the shape of a hollow frustum of a cone, and the sealing plate (901) matches the sealing groove (704).

3. The cylinder isolation device for a sensor of an ethylene oxide sterilization device according to claim 1, characterized in that: A second sealing gasket (1005) is provided at the bottom end of the piston plate (1004). The second sealing gasket (1005) is circular in shape and is made of rubber material.

4. The cylinder isolation device for a sensor of an ethylene oxide sterilization device according to claim 1, characterized in that: Heat insulation layers (101) are provided around the outer shell (1), and the fixed flange (3) is fixedly installed on the surface of the heat insulation layer (101).

Images