Mechanical interlock device for pressure vessel door, interlocking method and pharmaceutical equipment

Abstract

The present invention discloses a mechanical interlocking device for a pressure vessel door, which includes an air inlet pipeline, an interlocking valve, and a pneumatic limiting member for restricting the opening of the door. The air inlet pipeline is connected to the pneumatic limiting member through the interlocking valve, and the interlocking valve is provided with an elastic diaphragm that can be deformed under the pressure inside the pressure vessel to open the interlocking valve. An interlocking method for the mechanical interlocking device of the pressure vessel door as described above. When the pressure of the pressure vessel is not sufficient to deform the elastic diaphragm to open the interlocking valve, the air inlet pipeline cannot supply gas to the pneumatic limiting member, and the door can be opened; when the pressure of the pressure vessel can deform the elastic diaphragm to open the interlocking valve, the air inlet pipeline can supply gas to the pneumatic limiting member, and the pneumatic limiting member acts, and the door cannot be opened. A pharmaceutical equipment includes a pressure vessel and a door, and also includes the mechanical interlocking device for the pressure vessel door as described above. The present invention has the advantages of being not affected by power failure and electronic component failures, and being safe and reliable.

Description

Technical Field

[0001] The present invention relates to food and drug packaging machinery, and particularly to a mechanical interlock device for a pressure vessel door and pharmaceutical equipment. Background Art

[0002] For pressure vessels such as sterilizers with quick-opening doors, accidents caused by quick-opening doors of pressure vessels (positive pressure) occur frequently, posing a great risk to the personal safety of relevant personnel. Currently, a simple automatic control system interlock device cannot effectively identify risks in the event of a power failure or a malfunction of electronic components. In addition, accidental injury may occur during the door-opening process due to excessive opening pressure during interlock pressure relief. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a mechanical interlock device for a pressure vessel door that is not affected by power failure and electronic component failures and is safe and reliable.

[0004] The present invention further provides a mechanical interlock device for the above-mentioned pressure vessel door.

[0005] The present invention further provides a pharmaceutical equipment including the above-mentioned mechanical interlock device for a pressure vessel.

[0006] To solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A mechanical interlock device for a pressure vessel door includes an intake pipeline, an interlock valve, and a pneumatic limit member for restricting door opening. The intake pipeline is connected to the pneumatic limit member through the interlock valve, and an elastic diaphragm capable of deforming and opening the interlock valve after being subjected to the pressure inside the pressure vessel is provided on the interlock valve.

[0008] As a further improvement of the above technical solution:

[0009] An installation seat communicated with the pressure vessel is provided on the pressure vessel. The interlock valve includes an intake cavity, an outlet cavity, an interlock cavity, and a valve core assembly for separating the intake cavity and the outlet cavity. The intake pipeline is communicated with the intake cavity, the outlet cavity is communicated with the pneumatic limit member, the valve core assembly extends into the interlock cavity, and the elastic diaphragm is arranged between the interlock cavity and the installation seat.

[0010] The valve core assembly includes a valve rod. One end of the valve rod is located in the intake cavity and is provided with a sealing portion, and the other end of the valve rod is located in the interlock cavity and is provided with a valve plate.

[0011] If the pressure-bearing area of the sealing portion is S1 and the pressure-bearing area of the valve plate is S2, then S1 is less than S2.

[0012] The intake cavity and the outlet cavity are communicated through a conical channel.

[0013] A sealing packing is further provided between the outlet cavity and the interlock cavity, and the valve stem penetrates through the sealing packing.

[0014] An elastic member for resetting the valve core assembly is provided in the intake cavity.

[0015] A pressure gauge is provided on the intake pipeline.

[0016] An interlock method for the mechanical interlock device of the pressure vessel door described above. When the pressure of the pressure vessel is not sufficient to deform the elastic diaphragm to open the interlock valve, the intake pipeline cannot provide gas for the pneumatic limit member, and the door can be opened; when the pressure of the pressure vessel can deform the elastic diaphragm to open the interlock valve, the intake pipeline can provide gas for the pneumatic limit member, and the pneumatic limit member acts, and the door cannot be opened.

[0017] A pharmaceutical equipment includes a pressure vessel and a door for sealing the pressure vessel, and also includes the mechanical interlock device of the pressure vessel door described above.

[0018] Compared with the prior art, the advantages of the present invention are as follows: The mechanical interlock device of the pressure vessel door disclosed by the present invention uses a pneumatic limit member to restrict the opening of the door. The intake pipeline is connected to the pneumatic limit member through the interlock valve. When the interlock valve is opened, the intake pipeline can provide the working medium for the pneumatic limit member, and the pneumatic limit member acts to restrict the opening of the door; on the contrary, if the interlock valve is closed, the intake pipeline cannot provide the working medium for the pneumatic limit member, and the pneumatic limit member does not act, and the door can be normally opened. The opening and closing of the interlock valve depend on whether the elastic diaphragm is deformed under the action of the pressure inside the pressure vessel. Therefore, the pneumatic limit member is related to the pressure magnitude inside the pressure vessel and is a pure mechanical structure, which can be normally used under power failure or when electronic components fail. When the pressure vessel is under pressure, the door is automatically locked, improving the safety performance of the equipment.

[0019] The interlock method of the mechanical interlock device of the pressure vessel door disclosed by the present invention can automatically lock the door when the pressure vessel is internally pressurized, which is simple, convenient, and has good reliability, and is not affected by power failure or equipment electronic component failures.

[0020] The pharmaceutical equipment disclosed by the present invention includes the mechanical interlock device of the pressure vessel described above, and thus has the above-mentioned advantages as well. Description of the Drawings

[0021] Figure 1 It is a structural schematic diagram of the mechanical interlock device of the pressure vessel door and the pharmaceutical equipment of the present invention.

[0022] Figure 2It is a schematic structural diagram of the interlocking valve in the closed state of the present invention.

[0023] Figure 3 It is a schematic structural diagram of the interlocking valve in the open state of the present invention.

[0024] Figure 4 It is a schematic side view structural diagram of the pneumatic limiting member in the present invention.

[0025] Figure 5 It is a schematic front view structural diagram of the pneumatic limiting member in the present invention.

[0026] Each label in the figure represents: 1, door; 2, pneumatic limiting member; 3, pressure vessel; 4, interlocking valve; 41, intake cavity; 42, outlet cavity; 43, interlocking cavity; 44, elastic diaphragm; 45, sealing packing; 46, elastic member; 47, valve plate limiting member; 5, intake pipeline; 51, pressure gauge; 6, mounting seat; 7, valve core assembly; 71, valve stem; 72, sealing part; 74, valve plate. Detailed implementation manners

[0027] The present invention will be further described in detail below in conjunction with the specification drawings and specific embodiments.

[0028] Figures 1 to 5 An embodiment of the mechanical interlocking device for the pressure vessel door of the present invention is shown. The mechanical interlocking device for the pressure vessel door in this embodiment includes an intake pipeline 5, an interlocking valve 4, and a pneumatic limiting member 2 for restricting the opening of the door 1. The intake pipeline 5 is connected to the pneumatic limiting member 2 through the interlocking valve 4. An elastic diaphragm 44 that can be deformed to open the interlocking valve 4 after being subjected to the pressure inside the pressure vessel 3 is provided on the interlocking valve 4. Among them, the door 1 can be, for example, a common quick-opening sliding door. The pneumatic limiting member 2 can be, for example, a cylinder, etc. The cylinder is installed on one side of the sliding door track. After the piston rod of the cylinder extends, it can restrict the sliding door from moving along the track, so that the sliding door cannot be opened. Of course, in other embodiments, the door 1 can also be a revolving door, etc., and the pneumatic limiting member 2 is correspondingly used to restrict the rotational opening of the door 1.

[0029] The mechanical interlock device for the pressure vessel door uses a pneumatic limit member 2 to restrict the opening of the door 1. The air inlet pipeline 5 is connected to the pneumatic limit member 2 through the interlock valve 4. When the interlock valve 4 is opened, the air inlet pipeline 5 can provide the working medium for the pneumatic limit member 2, and the pneumatic limit member 2 acts to restrict the opening of the door 1. On the contrary, when the interlock valve 4 is closed, the air inlet pipeline 5 cannot provide the working medium for the pneumatic limit member 2, and the pneumatic limit member 2 does not act, and the door 1 can be opened normally. The opening and closing of the interlock valve 4 depend on whether the elastic diaphragm 44 is deformed under the pressure inside the pressure vessel 3. Therefore, the pneumatic limit member 2 is related to the pressure inside the pressure vessel 3 and is a pure mechanical structure, which can be used normally during a power outage or when the electronic components of the equipment fail. When the pressure vessel 3 is pressurized, the door 1 is automatically locked, improving the safety performance of the equipment.

[0030] Further, in this embodiment, an installation seat 6 communicating with the pressure vessel 3 is provided on the pressure vessel 3. The interlock valve 4 includes an air inlet chamber 41, an air outlet chamber 42, an interlock chamber 43, and a valve core assembly 7 for separating the air inlet chamber 41 and the air outlet chamber 42. The air inlet pipeline 5 is communicated with the air inlet chamber 41, the air outlet chamber 42 is communicated with the pneumatic limit member 2, the valve core assembly 7 extends into the interlock chamber 43, and the elastic diaphragm 44 is arranged between the interlock chamber 43 and the installation seat 6. In the normal state, the air inlet pipeline 5 conveys gas to the air inlet chamber 41, and the gas pressure in the air inlet chamber 41 is used to make the valve core assembly 7 separate the air inlet chamber 41 and the air outlet chamber 42, and the gas cannot be conveyed to the pneumatic limit member 2 through the air outlet chamber 42, and the pneumatic limit member 2 does not act. When there is a certain positive pressure inside the pressure vessel 3, the elastic diaphragm 44 is compressed and deformed, pushing the valve core assembly 7 to move towards the side where the air inlet chamber 41 is located, the air inlet chamber 41 is communicated with the air outlet chamber 42, and the gas can be conveyed to the pneumatic limit member 2 through the air outlet chamber 42, and the pneumatic limit member 2 acts to lock the door 1, with a simple and reliable structure; while the elastic diaphragm 44 realizes the sealing of the pressure vessel 3, only elastic deformation occurs, avoiding the problem of particulate contamination of the clean environment inside the pressure vessel 3 caused by friction in dynamic sealing.

[0031] Further, in this embodiment, the valve core assembly 7 includes a valve rod 71. One end of the valve rod 71 is located in the air inlet chamber 41 and is provided with a sealing portion 72, that is, the air inlet chamber 41 and the air outlet chamber 42 are separated by the sealing portion 72. The other end of the valve rod 71 is located in the interlock chamber 43 and is provided with a valve plate 74, which is beneficial for the valve core assembly 7 to move towards the side where the air inlet chamber 41 is located under the action of the positive pressure inside the pressure vessel 3, with a simple and reliable structure.

[0032] As a preferred technical solution, in this embodiment, if the pressure-receiving area of the sealing portion 72 is S1 and the pressure-receiving area of the valve plate 74 is S2, then S1 is less than S2. Since pressure is equal to the product of air pressure and the acting area, the larger the area of the valve plate 74, the greater the pressure can be obtained under the positive pressure inside the pressure vessel 3, thus pushing the valve core assembly 7 to move towards the side where the air inlet chamber 41 is located, with higher sensitivity; or rather, the greater the difference between S2 and S1, the lower the requirement for the pressure difference between the pressure vessel 3 and the air inlet chamber 41 to push the valve core assembly 7 to act.

[0033] As a preferred technical solution, in this embodiment, the air inlet chamber 41 and the air outlet chamber 42 are connected through a tapered channel, which is conducive to ensuring the sealing performance between the sealing portion 72 and the tapered channel.

[0034] As a preferred technical solution, in this embodiment, a sealing packing 45 is further provided between the air outlet chamber 42 and the interlock chamber 43, and the valve stem 71 penetrates through the sealing packing 45. By providing the sealing packing 45, the valve core assembly 7 can penetrate through it and move, while ensuring the sealing performance between the air outlet chamber 42 and the interlock chamber 43.

[0035] As a preferred technical solution, in this embodiment, an elastic member 46 for resetting the valve core assembly 7, such as a helical spring, etc., is provided in the air inlet chamber 41. When there is positive pressure inside the pressure vessel 3 and the valve core assembly 7 moves towards the side where the air inlet chamber 41 is located, the elastic member 46 is compressed. After the pressure inside the pressure vessel 3 is relieved, the elastic member 46 expands to automatically reset the valve core assembly 7, with a simple structure and convenient use. Further, valve plate limit members 47 can be provided on both sides of the valve plate 74 to limit the maximum movement amount of the valve plate 74.

[0036] As a preferred technical solution, in this embodiment, a pressure gauge 51 is provided on the air inlet pipeline 5 to facilitate obtaining the intake pressure of the air inlet pipeline 5.

[0037] For the interlock method of the mechanical interlock device for the pressure vessel door in this embodiment, when the pressure of the pressure vessel 3 is not sufficient to deform the elastic diaphragm 44 to open the interlock valve 4, the air inlet pipeline 5 cannot supply gas to the pneumatic limiting member 2, and the door 1 can be opened; when the pressure of the pressure vessel 3 can deform the elastic diaphragm 44 to open the interlock valve 4, the air inlet pipeline 5 can supply gas to the pneumatic limiting member 2, and the pneumatic limiting member 2 acts, and the door 1 cannot be opened.

[0038] For the interlock method of this mechanical interlock device for the pressure vessel door, when the pressure vessel 3 is under pressure, the door 1 can be automatically locked, which is simple, convenient, and has good reliability, and is not affected by power outages or failures of equipment electronic components.

[0039] The pharmaceutical equipment (such as a sterilization cabinet, etc.) of this embodiment includes a pressure vessel 3 and a door 1 for sealing the pressure vessel, and also includes the above-mentioned mechanical interlocking device for the pressure vessel door.

[0040] This pharmaceutical equipment includes the above-mentioned mechanical interlocking device for the pressure vessel, and thus has the same advantages.

[0041] Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make many possible changes and modifications to the technical solution of the present invention by using the above-disclosed technical content, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention shall fall within the scope of protection of the technical solution of the present invention.

Claims

1. A mechanical interlock device for a pressure vessel door, characterized in that: It includes an intake pipeline (5), an interlock valve (4), and a pneumatic limit member (2) for restricting the opening of the door (1). The intake pipeline (5) is connected to the pneumatic limit member (2) through the interlock valve (4). An elastic diaphragm (44) that can be deformed to open the interlock valve (4) after being subjected to the pressure inside the pressure vessel (3) and a valve plate limit member (47) that can limit the maximum deformation of the elastic diaphragm (44) are provided on the interlock valve (4). An installation seat (6) communicating with the pressure vessel (3) is provided on the pressure vessel (3). The interlock valve (4) includes an intake cavity (41), an outlet cavity (42), an interlock cavity (43), and a valve core assembly (7) for separating the intake cavity (41) and the outlet cavity (42). The intake pipeline (5) is communicated with the intake cavity (41), the outlet cavity (42) is communicated with the pneumatic limit member (2), the valve core assembly (7) extends into the interlock cavity (43), the elastic diaphragm (44) is arranged between the interlock cavity (43) and the installation seat (6), the valve core assembly (7) includes a valve rod (71). One end of the valve rod (71) is located in the intake cavity (41) and is provided with a sealing portion (72), and the other end of the valve rod (71) is located in the interlock cavity (43) and is provided with a valve plate (74); when the pressure of the pressure vessel (3) is not sufficient to deform the elastic diaphragm (44) to open the interlock valve (4), the intake pipeline (5) cannot supply gas to the pneumatic limit member (2), and the door (1) can be opened; when the pressure of the pressure vessel (3) can deform the elastic diaphragm (44) to open the interlock valve (4), the intake pipeline (5) supplies gas to the pneumatic limit member (2), and the door (1) cannot be opened.

2. The mechanical interlock device for a pressure vessel door according to claim 1, characterized in that: If the pressure-bearing area of the sealing portion (72) is S1 and the pressure-bearing area of the valve plate (74) is S2, then S1 is less than S2.

3. The mechanical interlock device for a pressure vessel door according to claim 1, characterized in that: The intake cavity (41) and the outlet cavity (42) are communicated through a conical channel.

4. The mechanical interlock device for a pressure vessel door according to claim 1, characterized in that: A sealing packing (45) is further provided between the outlet cavity (42) and the interlock cavity (43), and the valve rod (71) penetrates through the sealing packing (45).

5. The mechanical interlock device for a pressure vessel door according to any one of claims 1 to 4, characterized in that: An elastic member (46) for resetting the valve core assembly (7) is provided in the intake cavity (41).

6. The mechanical interlock device for a pressure vessel door according to any one of claims 1 to 4, characterized in that: A pressure gauge (51) is provided on the intake pipeline (5).

7. A pharmaceutical equipment, including a pressure vessel (3) and a door (1) for sealing the pressure vessel, characterized in that: It further includes the mechanical interlock device for a pressure vessel door according to any one of claims 1 to 6.

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