CN108253735B - Safety device for vacuum drying tank and vacuum drying tank - Google Patents
Safety device for vacuum drying tank and vacuum drying tank Download PDFInfo
- Publication number
- CN108253735B CN108253735B CN201710982637.9A CN201710982637A CN108253735B CN 108253735 B CN108253735 B CN 108253735B CN 201710982637 A CN201710982637 A CN 201710982637A CN 108253735 B CN108253735 B CN 108253735B
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- magnet
- vacuum drying
- isolation cover
- tank
- tank body
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/04—Heating arrangements using electric heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
- F26B9/06—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Sustainable Development (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention provides a safety device for a vacuum drying tank and the vacuum drying tank, and relates to the technical field of vacuum drying. The vacuum drying tank body is provided with a through hole, and the safety device comprises an isolation cover, a first magnet, a pull rope, a first magnetic induction component and a controller. The isolation cover is provided with an open end and a closed end, the open end is connected with the through hole in a sealing way, the closed end is positioned outside the tank body, and the isolation cover is made of non-magnetic conduction materials. The first magnet is movably arranged in the isolation cover. One end of the pull rope is connected with the first magnet, and the other end of the pull rope is positioned in the tank body. The first magnetic induction component is arranged outside the isolation cover, can be triggered when the first magnet moves out of the first preset area, and sends out a first trigger signal. And the controller is used for controlling the vacuum drying tank to stop working when receiving the first trigger signal.
Description
Technical Field
The invention relates to the technical field of vacuum drying, in particular to a safety device for a vacuum drying tank and the vacuum drying tank.
Background
Vacuum drying tanks are commonly used for gas phase drying, hot air drying, pressure swing drying, and the like, and generally include a tank body and a tank door. When the workpiece is dried by the vacuum drying tank, the workpiece is firstly placed into the tank body and the tank body is sealed by the tank door. Subsequently, the vacuum drying tank may be placed in a vacuum state by a vacuum pumping device. Meanwhile, the tank body needs to be pressurized and heated, so that the pressure in the tank body is about 10Pa and the temperature is 100-140 ℃, the workpiece is dried, and the pressure and the temperature need to be maintained for a long time so as to ensure the drying effect.
However, when handling workpieces or operating vacuum drying tanks, operators often need to enter the tank; if the working negligence or equipment failure occurs, operators can be trapped in the tank body, and after the tank body is sealed, the operators cannot contact with the outside; at this time, if the drying process is directly started, operations such as vacuumizing, pressurizing, heating and the like are performed, the environment in the tank body makes the trapped personnel difficult to survive, so that the life safety of the trapped operators is seriously threatened.
The above information disclosed in the background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is already known to a person of ordinary skill in the art.
Disclosure of Invention
The present invention has been made to overcome the above-mentioned drawbacks of the prior art, and an object of the present invention is to provide a safety device for a vacuum drying pot and a vacuum drying pot capable of stopping the vacuum drying pot in the vacuum drying pot.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
According to one aspect of the invention, a safety device for a vacuum drying tank having a tank body with a through hole includes an isolation cover, a first magnet, a pull rope, a first magnetic induction component, and a controller. The isolation cover is provided with an open end and a closed end, the open end is hermetically arranged in the through hole, the closed end is positioned outside the tank body, and the isolation cover is made of non-magnetic conduction materials. The first magnet is movably arranged in the isolation cover. One end of the pull rope is connected with the first magnet, and the other end of the pull rope is positioned in the tank body. The first magnetic induction component is arranged outside the isolation cover, can be triggered when the first magnet moves out of a first preset area, and sends out a first trigger signal. And the controller is used for controlling the vacuum drying tank to stop working when receiving the first trigger signal.
According to an embodiment of the present invention, the safety device further includes a second magnetic induction component, where the second magnetic induction component is disposed outside the isolation cover and can be triggered when the first magnet moves out of the first preset area, and sends out a second trigger signal. And the controller is also used for controlling the vacuum drying tank to stop working when receiving the second trigger signal.
According to an embodiment of the invention, the safety device further comprises a baffle and an elastic member. The baffle is arranged in the isolation cover and is positioned at one side of the first magnet, which is close to the open end, and is provided with a through hole for the pull rope to pass through, and the baffle is made of non-magnetic conduction materials. One end of the elastic piece is abutted against the first magnet, the other end of the elastic piece is abutted against the baffle, and the elastic piece can be compressed when the first magnet moves from the first preset area to the baffle.
According to one embodiment of the invention, the first magnetic induction component is a magnetic switch, and the magnetic switch is arranged on the end face of the closed end; the second magnetic induction component is a magnetic ball switch, and the magnetic ball switch is arranged on the side wall of the isolation cover.
According to one embodiment of the present invention, the second magnetic induction assembly includes a housing, a guide rod, a float ball, a second magnet, and a trigger assembly. The shell is vertically arranged and provided with a top end part and a bottom end part, the top end part is connected with the isolation cover, and the shell is made of non-magnetic conduction materials. One end of the guide rod is arranged in the shell, the other end of the guide rod penetrates out of the bottom end part, and the guide rod is made of non-magnetic conduction materials. The floating ball is arranged in the shell and can be sleeved outside the guide rod in a sliding manner. The second magnet is fixed on the floating ball, when the first magnet is located in the first preset area, the second magnet is attracted to the second preset area by the first magnet, and when the first magnet moves out of the first preset area, the second magnet can slide downwards along the guide rod along with the floating ball so as to move out of the second preset area. The trigger assembly is arranged on the guide rod and used for sending out the second trigger signal when the second magnet is sensed to move out of the second preset area.
According to an embodiment of the present invention, the second magnetic induction assembly further includes a blocking piece, which is fixed to the guide rod and located between the floating ball and the bottom end portion, for blocking the floating ball from contacting the bottom end portion.
According to an embodiment of the invention, the tip end portion is detachably connected to the shield.
According to one embodiment of the invention, the safety device further comprises a plurality of guide wheels, the guide wheels are arranged on the inner wall of the tank body, and the part of the pull rope positioned in the tank body is sequentially matched with and bypasses each guide wheel.
According to an embodiment of the invention, the safety device further comprises an alarm assembly, which is connected to the controller. The controller is also used for controlling the alarm component to give an alarm when the first trigger signal and/or the second trigger signal are received.
According to one aspect of the invention, a vacuum drying tank comprises a tank body capable of enclosing a closed space, wherein a through hole is formed in the tank body, and the vacuum drying tank further comprises the safety device, and the safety device is mounted in the through hole in a sealing mode.
According to the technical scheme, the invention has at least one of the following advantages and positive effects:
in the initial state, the first magnet is positioned in a first preset area, and at the moment, the first magnetic induction component can sense the first magnet; an operator trapped in the tank body can move the first magnet out of the first preset area by pulling the pull rope, so that the first magnetic induction component cannot sense the first magnet to be triggered, and a first trigger signal is sent out; the controller can control the vacuum drying tank to stop working after receiving the first trigger signal. Therefore, operators trapped in the tank body can stop the vacuum drying tank from working in the tank body, and timely stop the drying process, so that safety accidents caused by negligence of working or equipment failure are prevented, and the safety of the vacuum drying tank is improved.
Meanwhile, the isolation cover is in sealing connection with the tank body, so that the sealing performance of the tank body can be guaranteed, the vacuum environment in the tank body is prevented from being influenced by the through hole of the tank body, and the drying work can be smoothly carried out.
Drawings
The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.
FIG. 1 is a schematic view of a first magnet of a security device according to an exemplary embodiment of the present invention in a first predetermined area;
fig. 2 is an enlarged view of a portion a in fig. 1;
FIG. 3 is a schematic view of a first magnet of a security device according to an exemplary embodiment of the present invention moving out of a first predetermined area;
FIG. 4 is a schematic diagram of a vacuum drying tank according to an exemplary embodiment of the present invention;
fig. 5 is an enlarged view of the portion B in fig. 4.
In the figure: 1. an isolation cover; 2. a baffle; 21. a via hole; 3. a first magnet; 4. an elastic member; 5. a pull rope; 6. a guide wheel; 7. a first magnetically susceptible component; 8. a second magnetically susceptible component; 81. a housing; 82. a guide rod; 83. a floating ball; 84. a second magnet; 85. a baffle; 86. a connector lug; 9. a tank body; 10. a tank door.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of an icon to another component, these terms are used in this specification for convenience only, such as in terms of the orientation of the examples described in the figures. It will be appreciated that if the device of the icon is flipped upside down, the recited "up" component will become the "down" component. Other relative terms such as "top," "bottom," and the like are also intended to have similar meanings. When a structure is "on" another structure, it may mean that the structure is integrally formed with the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure through another structure. The terms "a," "an," "the," and "said" are used to indicate the presence of one or more elements/components/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. in addition to the listed elements/components/etc.; the terms "first," "second," and the like are used merely as labels, and are not intended to limit the number of their objects.
In an exemplary embodiment of the present invention, a safety device for a vacuum drying tank is provided, which may be used for kerosene gas drying, hot air drying, or pressure swing drying, etc., as shown in fig. 4, the vacuum drying tank may include a tank body 9 and a tank door 10, one end of the tank body 9 has a tank opening, a workpiece may be moved into and out of the tank body 9 from the tank opening, and a through hole is formed in the tank body 9. The pod door 10 may be sealingly coupled to the pod door. Meanwhile, the drying vacuum tank can further comprise a vacuum pump, a heating assembly, a breaking valve, a tank door driving assembly and the like, wherein: a vacuum pump may be used to evacuate the canister 9. The heating assembly may be used to raise the temperature within the tank 9. The empty breaking valve can be arranged on the tank body 9, and after the empty breaking valve is opened, the tank body 9 can be communicated with the outside so as to break the vacuum environment in the tank body 9. The tank door driving assembly may be a hydraulic cylinder, an air cylinder, a motor, or the like for driving the tank door 10 to move to open or close the tank opening of the tank 9. Reference is made in particular to existing drying vacuum tanks, which are not described in detail here.
As shown in fig. 1 to 5, the safety device of the present exemplary embodiment may include a cage 1, a barrier 2, a first magnet 3, an elastic member 4, a pulling rope 5, a guide wheel 6, a first magnetic induction assembly 7, a second magnetic induction assembly 8, and a controller.
In the present exemplary embodiment, the shielding cover 1 may have a tubular structure, and the cross-sectional shape thereof may be circular, rectangular or other shapes, without being particularly limited thereto. Meanwhile, the isolation cover 1 can be provided with an open end and a closed end, so that the isolation cover 1 can be communicated with the outside through the open end, the open end can be arranged in the through hole on the tank body 9 and is in sealing connection with the through hole, and the closed end can be positioned outside the tank body 9, so that the through hole is plugged through the isolation cover 1, and the sealing performance of the tank body 9 is ensured. The sealing connection between the isolation cover 1 and the tank 9 may be a welding method, or a sealing ring is provided between the isolation cover 1 and the through hole, which is not described herein. In addition, the material of the isolation cover 1 may be aluminum, but not limited to this, and may also be non-magnetic metal such as copper or stainless steel; of course, the shield 1 is not limited to a non-magnetic metal material, and may be a non-metal material such as plastic, as long as it is a non-magnetic material.
In the present exemplary embodiment, as shown in fig. 2, the baffle 2 may be disposed in the isolation cover 1, and may be fixedly connected to the isolation cover 1 in a detachable manner, for example: the outer edge of the baffle plate 2 can be provided with external threads, the inner wall of the isolation cover 1 can be provided with internal threads, the baffle plate 2 can be fixed in the isolation cover 1 in a threaded connection mode, and the position of the baffle plate 2 can be adjusted by rotating the baffle plate 2; or the baffle plate 2 can be directly clamped in the isolation cover 1. Of course, the baffle 2 may be fixedly connected to the shielding case 1 by welding, bonding, or the like.
The baffle 2 may be located on the side of the first magnet 3 adjacent the open end of the cage 1 to prevent the first magnet 3 from sliding out of the open end. Meanwhile, the baffle plate 2 may be provided with a via hole 21, and the diameter of the via hole 21 may be larger than that of the pull rope 5, so that the pull rope 5 may pass through the via hole 21 to be connected with the first magnet 3. In addition, the baffle 2 may be made of the same material as the shield 1 or other non-magnetic material, which is not described in detail herein.
In the present exemplary embodiment, the shape and size of the first magnet 3 may be matched to the inner wall of the cage 1, for example, the cage 1 is rectangular parallelepiped, and the first magnet 3 is rectangular parallelepiped; the cage 1 is cylindrical and the first magnet 3 is cylindrical. Meanwhile, the first magnet 3 may be a high temperature resistant magnet, and may be specifically selected according to the working temperature of the first magnet 3, for example, the first magnet 3 may be a magnet that can work at 120-130 ℃ and has no magnetic property, such as an alnico magnet or ferrite magnet. Of course, the first magnet 3 may be a magnet whose operating temperature is not within the range of 120 ℃ to 130 ℃, which is not shown here.
The first magnet 3 is provided in the isolation cover 1 and can reciprocate linearly in the isolation cover 1. Specifically, in the initial state, the first magnet 3 may be located in a first predetermined area within the shield 1, at which time the first magnet 3 abuts against the end face of the closed end of the shield 1. The first magnet 3 may be moved from the first preset area to the baffle plate 2 by an external force to move out of the first preset area, and of course, the first magnet 3 may be moved into the first preset area again by an external force.
In this exemplary embodiment, the elastic member 4 may be a spring, one end of which may abut against the first magnet 3, the other end may abut against the baffle 2, and the spring may be sleeved outside the pull cord 5. When the first magnet 3 is in the first preset area, the elastic piece 4 is in a compressed state, and the first magnet 3 is tightly propped against the closed end, so that the first magnet is prevented from moving randomly. When the first magnet 3 moves towards the baffle plate 2 under the action of external force, the elastic piece 4 can be further compressed by the first magnet 3; when the external force disappears, the elastic piece 4 can push the first magnet 3 to reset, namely, the first magnet returns to the first preset area, so that manual reset is avoided. Of course, the elastic member 4 is not limited to a spring, but may be a rubber column, a compressible air cushion, or the like, which is not illustrated herein. In addition, the elastic member 4 may be fixedly connected with the first magnet 3 and the baffle 2 while abutting against the first magnet 3 and the baffle 2, and the specific connection manner is not particularly limited herein.
In the present example embodiment, the pull cord 5 may be a wire rope, nylon rope, or other flexible connection that can be used for pulling. One end of the pull rope 5 can be connected with the first magnet 3, and the other end can pass through the through hole 21 on the baffle plate 2 and extend into the tank body 9. An operator trapped in the tank 9 can move the first magnet 3 out of the first predetermined area by pulling the pull cord 5. The portion of the pull cord 5 located in the tank 9 may be located on the side wall of the tank 9, or may be directly placed on the bottom surface of the tank 9, and the length of the portion is not particularly limited herein. The manner of connecting the pull cord 5 to the first magnet 3 may include: the pull rope 5 is directly bound on the first magnet 3; a pull ring is fixed on the first magnet 3, and the pull rope 5 is fixedly connected with the hanging ring; alternatively, the pull cord 5 is passed through the first magnet 3 and a stopper is bound at one end passed through the first magnet 3 to prevent the pull cord 5 from being pulled out of the first magnet 3. Of course, the pull cord 5 may be connected to the first magnet 3 in other ways, which are not shown here.
In the present exemplary embodiment, as shown in fig. 4, the number of the guide wheels 6 may be two, three, four or more. The guide wheels 6 can be arranged on the inner wall of the tank 9. The part of the pull rope 5 positioned in the tank 9 can be sequentially matched and bypass each guide wheel 6, so that the pull rope 5 can be positioned and guided by the plurality of guide wheels 6, the pull rope 5 is prevented from being scattered in the tank 9, interference to the workpiece in/out is prevented, and the pull is convenient for operators to pull. Meanwhile, the side surface of the inner wall of the tank body 9 and the corner of the adjacent side surface can be provided with guide wheels 6 so as to guide the pull rope 5 to turn.
For example, each guiding wheel 6 may include a wheel frame and a wheel body, the wheel body may be rotatably connected with the wheel frame, and the outer circumferential surface of the wheel body is provided with a wheel groove matched with the pull rope 5. The guide wheels 6 and the isolation cover 1 can be arranged in the same horizontal plane, the wheel frames of the guide wheels 6 can be respectively fixed on the side surfaces of the inner wall of the tank body 9 in a welding or bolt connection mode, the wheel bodies of the guide wheels 6 are horizontally arranged, and the rotation axes of the wheel bodies are vertically arranged. The part of the pull rope 5 positioned in the tank body 9 can sequentially bypass each wheel body and be matched with the wheel grooves of each wheel body, so that the pull rope 5 can be distributed around the inner wall of the tank body 9. When the pull rope 5 is pulled, each wheel body can rotate along with the pull rope.
In this exemplary embodiment, the first magnetic induction component 7 may be a magnetic switch, which may be disposed outside the isolation cover 1 and opposite to the end surface of the closed end of the isolation cover 1, and the first magnetic induction component 7 may be fixedly connected to the tank 9 or may be fixedly connected to the isolation cover 1. The first magnetic induction component 7 can sense the first magnet 3, specifically, as shown in fig. 1, when the first magnet 3 is located in the first preset area, the first magnetic induction component 7 can sense the first magnet 3, and at this time, the first magnetic induction component 7 is in an unactuated state; as shown in fig. 3, when the first magnet 3 moves out of the first preset area under the pulling of the pull cord 5, the first magnetic induction component 7 cannot sense the first magnet 3, and at this time, the first magnetic induction component 7 is triggered and sends out a first trigger signal. The specific structure of the magnetic switch may refer to the existing magnetic switch, which is not described in detail herein, and the first magnetic induction component 7 may also be a magnetic induction sensor, etc., so long as the first magnetic induction component can send the first trigger signal when the first magnet 3 moves out of the second preset area, which is not described herein.
In the present exemplary embodiment, the second magnetic induction component 8 may be disposed outside the isolation cover 1 and fixed to an outer sidewall of the isolation cover 1. As shown in fig. 1, when the first magnet 3 is located in the first preset area, the second magnetic induction component 8 can sense the first magnet 3, and at this time, the second magnetic induction component 8 is in an unactuated state; as shown in fig. 3, when the first magnet 3 moves out of the first preset area under the pulling of the pull cord 5, the second magnetic induction component 8 cannot sense the first magnet 3, and at this time, the second magnetic induction component 8 is triggered and sends out a second trigger signal.
The second magnetic induction component 8 may be a magnetic ball switch, a magnetic switch, or a magnetic induction sensor, for example, the second magnetic induction component 8 may be a magnetic ball switch, which may include a housing 81, a guide rod 82, a float 83, a second magnet 84, a baffle 85, a connector lug 86, and a trigger component, wherein:
the housing 81 may have a vertically disposed cylindrical structure having a top end portion and a bottom end portion, and the top end portion may have an open structure or a closed structure, and the bottom end portion may have a closed structure. The top end portion of the housing 81 may be provided with external threads and may be opposite to the above-mentioned first preset area, and the area on the sidewall of the isolation cover 1 corresponding to the housing 81 may be provided with a screw hole or a groove provided with internal threads, so that the top end portion may be screwed with the screw hole, thereby detachably connecting the housing 81 with the isolation cover 1. Of course, the side walls of the housing 81 and the isolation cover 1 may be fixedly connected by a detachable manner such as a snap connection or a bolt connection. Meanwhile, the housing 81 may be made of the same non-magnetic material as the isolation cover 1, or may be made of a non-magnetic material different from the isolation cover 1, which will not be described in detail herein.
The guide rod 82 may be vertically disposed, one end of the guide rod may be disposed in the housing 81 and not in contact with the isolation cover 1, the other end may penetrate out of the bottom end of the housing 81, and the guide rod 82 and the housing 81 may be fixedly connected by welding, clamping or threaded connection. Meanwhile, the guide rod 82 may be made of the same non-magnetic material as the isolation cover 1, or may be made of a non-magnetic material different from the isolation cover 1, which will not be described in detail herein. In addition, the guide rod 82 may have a tubular structure with a receiving space therein, or the guide rod 82 may have a solid structure.
The floating ball 83 can be arranged in the shell 81, sleeved outside the guide rod 82 and can slide back and forth along the guide rod 82. The float 83 may be made of non-magnetic material or magnetic material, and specific reference is made to the material of the isolation cover 1, which will not be described in detail herein.
The second magnet 84 may also be disposed within the housing 81 and secured to the top or other location of the float 83. Meanwhile, the second magnet 84 may be sleeved outside the guide rod 82 and may slide reciprocally along the guide rod 82, and of course, the second magnet 84 may also be located at one side of the guide rod 82. When the first magnet 3 is located in the first preset area, the second magnet 84 may be fixed in the second preset area under the attraction of the first magnet 3, and at this time, the positions of the second magnet 84 and the floating ball 83 remain unchanged; when the first magnet 3 moves out of the first preset area, the second magnet 84 loses the attraction of the first magnet 3, and the second magnet 84 and the floating ball 83 can slide down along the guide rod 82 under the action of the gravity of the second magnet 84 and the floating ball 83, so as to leave the second preset area. When the first magnet 3 returns to the first preset area, the first magnet 3 may re-attract the second magnet 84 to the second preset area, so as to reset the second magnet 84. The material of the second magnet 84 may be the same as that of the first magnet 3, and of course, a material different from that of the first magnet 3 may be used, and will not be described in detail.
The baffle 85 can be arranged in the shell 81 and fixed on the guide rod 82 by welding or threaded connection, and the baffle 85 can be positioned between the floating ball 83 and the bottom end of the shell 81, and the baffle 85 can prevent the floating ball 83 from sliding downwards to collide with the bottom end of the shell 81.
The trigger assembly may be disposed on the guide rod 82 and may sense the second magnet 84, and may output a second trigger signal when the second magnet 84 slides down and moves out of the second predetermined area. For example, the triggering component may include a magnetic reed switch, and the guide rod 82 may have a tubular structure, and the magnetic reed switch may be disposed in the guide rod 82 and sense the second magnet 84. When the first magnet 3 is in the first preset area, the second magnet 84 is positioned in the second preset area and kept fixed under the attraction of the first magnet 3. When the first magnet 3 moves out of the first preset area, the second magnet 84 loses the attraction of the first magnet 3 and slides down until moving out of the second preset area, and the magnetic reed switch can be triggered to output a second trigger signal. The principle of triggering the reed switch by the movement of the magnet can be referred to as the existing principle of operation of the reed switch, and will not be described in detail here. Of course, the triggering assembly may also be used with magnetic induction sensors, etc., which are not further illustrated herein.
The connector lug 86 may be provided at an end of the pull rod 82 extending out of the housing 81 to connect the trigger assembly to the controller, and the structure of the connector lug 86 is not particularly limited herein.
In the present exemplary embodiment, the controller may be a microcontroller such as a single-chip microcomputer or a PLC (Programmable Logic Controller ), or the controller may be a control device such as an industrial computer. The controller can receive the first trigger signal and the second trigger signal, and when the first trigger signal or the second trigger signal or one of the first trigger signal and the second trigger signal is received, the controller can control the vacuum drying tank to stop working. For the safety device with the first magnetic induction component 7 and the second magnetic induction component 8, even if one of the first magnetic induction component 7 and the second magnetic induction component 8 is damaged, the safety device can control the vacuum drying tank to stop working, so that the safety is further improved.
The vacuum drying tank stopping operation may include stopping vacuum pumping, stopping heating, breaking vacuum, opening the tank door 10, etc. For example, the vacuum pump, the heating assembly, the emptying valve and the tank door driving assembly of the vacuum drying tank may be connected to the controller, and when the controller receives the first trigger signal and/or the second trigger signal, the control assembly may control the vacuum pump to stop vacuumizing, control the heating assembly to stop heating, control the emptying valve to open, and control the tank door driving device to open the tank door 10, thereby ensuring the safety of the trapped operator and facilitating timely evacuation. Of course, the vacuum drying tank may be stopped by stopping the vacuum pumping, stopping the heating, breaking the vacuum state, and opening only a part of the operations among the tank door 10.
In this example embodiment, the alarm assembly may be provided outside the tank 9, which may be an audible and visual alarm, a buzzer, an indicator light, or the like. The controller can be connected with the alarm component, and when the first trigger signal and/or the second trigger signal are received, the alarm component can be controlled to give an alarm so as to remind personnel outside the tank body 9 to carry out emergency treatment in time. The manner in which the alarm is raised may depend on the type of alarm assembly, for example: if the alarm component is an audible and visual alarm, the alarm is sent in a mode of sending out alarm sound and sending out alarm light; if the alarm component is a buzzer, the alarm is sent in a mode of sending out alarm sound.
The exemplary embodiment of the present invention also provides a vacuum drying tank, as shown in fig. 4 and 5, which may include a tank body 9 and the safety device in any of the above-described exemplary embodiments.
In this embodiment, the tank 9 can enclose a closed space, and the tank 9 has a tank opening, and a through hole may be formed on a sidewall of the tank 9, and the closed end of the isolation cover 1 of the safety device may be disposed in the through hole and connected with the through hole in a sealing manner.
It should be noted that the vacuum drying tank according to the exemplary embodiment of the present invention may further include other components, and reference may be made to the vacuum drying tank according to the foregoing exemplary embodiment and the existing vacuum drying tank, which will not be described in detail herein.
The working principle of the safety device according to the exemplary embodiment of the present invention is as follows:
in the initial state, the first magnet 3 is located in a first preset area, and at this time, the first magnetic induction component 7 and the second magnetic induction component 8 are both in an un-triggered state, so that the vacuum drying tank can work normally.
When the operator is trapped in the tank 9 of the vacuum drying tank, the pull rope 5 can be pulled to drive the first magnet 3 to move from the first preset area to the baffle plate 2. When the first magnet 3 moves out of the first preset area, the first magnetic induction component 7 and the second magnetic induction component 8 cannot sense the first magnet 3, so that the first magnet is triggered, and a first trigger signal and a second trigger signal are respectively sent out. When the controller receives the first trigger signal and/or the second trigger signal, the controller can control the vacuum drying tank to stop working so as to ensure the safety of operators. Meanwhile, the controller can also control the alarm assembly to give out an alarm to remind operators outside the tank body 9 of timely rescue and overhaul.
According to the safety device and the vacuum drying tank of the example embodiment of the invention, as the first magnet 3 is moved out of the first preset area by pulling the pull rope 5, the vacuum drying tank can be controlled by the controller to stop working, so that an operator trapped in the tank body 9 can operate in the tank body 9, the drying process of the vacuum drying tank can be stopped in time, safety accidents caused by negligence of working or equipment failure are prevented, and the safety of the vacuum drying tank is improved. Meanwhile, the isolation cover 1 is in sealing connection with the tank body 9, so that the sealing performance of the tank body 9 can be guaranteed, the vacuum environment in the tank body 9 is prevented from being influenced by the through hole of the tank body 9, and the drying work can be smoothly carried out.
It should be understood that the invention is not limited in its application to the details of construction and the arrangement of components set forth in the specification. The invention is capable of other embodiments and of being practiced and carried out in various ways. The foregoing variations and modifications are intended to fall within the scope of the present invention. It should be understood that the invention disclosed and defined in this specification extends to all alternative combinations of two or more of the individual features mentioned or evident from the text and/or drawings. All of these different combinations constitute various alternative aspects of the present invention. The embodiments described in this specification illustrate the best mode known for carrying out the invention and will enable those skilled in the art to make and use the invention.
Claims (6)
1. A safety device for a vacuum drying tank, characterized in that a tank body of the vacuum drying tank is provided with a through hole, the safety device comprising:
the isolation cover is provided with an open end and a closed end, the open end is hermetically arranged in the through hole, the closed end is positioned outside the tank body, and the isolation cover is made of non-magnetic conduction materials;
the first magnet is movably arranged in the isolation cover;
one end of the pull rope is connected with the first magnet, and the other end of the pull rope is positioned in the tank body;
the first magnetic induction component is arranged outside the isolation cover, can be triggered when the first magnet moves out of a first preset area and sends out a first trigger signal;
the controller is used for controlling the vacuum drying tank to stop working when the first trigger signal is received;
the second magnetic induction component is arranged outside the isolation cover, can be triggered when the first magnet moves out of the first preset area and sends out a second trigger signal, and the controller is further used for controlling the vacuum drying tank to stop working when receiving the second trigger signal;
the baffle is arranged in the isolation cover and is positioned at one side of the first magnet close to the open end, the baffle is provided with a through hole for the pull rope to pass through, and the baffle is made of a non-magnetic conduction material; and
an elastic member having one end abutting against the first magnet and the other end abutting against the shutter, and being compressible when the first magnet moves from the first preset area to the shutter;
the first magnetic induction component is a magnetic switch, and the magnetic switch is arranged on the end face of the closed end; the second magnetic induction component is a magnetic ball switch which is arranged on the side wall of the isolation cover,
wherein the second magnetically susceptible component comprises:
the shell is vertically arranged and provided with a top end part and a bottom end part, the top end part is connected with the isolation cover, and the shell is made of non-magnetic conduction materials;
one end of the guide rod is arranged in the shell, the other end of the guide rod penetrates out of the bottom end part, and the guide rod is made of non-magnetic conduction materials;
the floating ball is arranged in the shell and is sleeved outside the guide rod in a sliding manner;
the second magnet is fixed on the floating ball, when the first magnet is positioned in the first preset area, the second magnet is attracted to the second preset area by the first magnet, and when the first magnet moves out of the first preset area, the second magnet can slide downwards along the guide rod along with the floating ball so as to move out of the second preset area; and
and the trigger assembly is arranged on the guide rod and used for sending out the second trigger signal when the second magnet is sensed to move out of the second preset area.
2. The security device of claim 1 wherein the second magnetically susceptible component further comprises:
and the baffle is fixed on the guide rod and positioned between the floating ball and the bottom end part and used for blocking the contact of the floating ball and the bottom end part.
3. The safety device of claim 1, wherein the top end of the housing is detachably connected to the cage.
4. The security device of claim 1, further comprising:
the guide wheels are arranged on the inner wall of the tank body, and the part of the pull rope positioned in the tank body is sequentially matched with and bypasses the guide wheels.
5. The security device of claim 1, further comprising:
the alarm assembly is connected with the controller;
the controller is also used for controlling the alarm component to give an alarm when the first trigger signal and/or the second trigger signal are received.
6. A vacuum drying tank comprising a tank body capable of enclosing a closed space, the tank body being provided with a through hole, characterized in that the vacuum drying tank further comprises a safety device according to any one of claims 1-5, the safety device being sealingly mounted in the through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710982637.9A CN108253735B (en) | 2017-10-20 | 2017-10-20 | Safety device for vacuum drying tank and vacuum drying tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710982637.9A CN108253735B (en) | 2017-10-20 | 2017-10-20 | Safety device for vacuum drying tank and vacuum drying tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108253735A CN108253735A (en) | 2018-07-06 |
| CN108253735B true CN108253735B (en) | 2023-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710982637.9A Active CN108253735B (en) | 2017-10-20 | 2017-10-20 | Safety device for vacuum drying tank and vacuum drying tank |
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| CN (1) | CN108253735B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101211492A (en) * | 2006-12-26 | 2008-07-02 | 乐金电子(中国)研究开发中心有限公司 | Article anti-theft method, burglar proof mobile communication terminal and theftproof system |
| CN201421804Y (en) * | 2009-03-06 | 2010-03-10 | 崔志君 | Balance type displacement sensor |
| CN203444624U (en) * | 2013-07-16 | 2014-02-19 | 山东众泰达工业装备有限公司 | Safe apparatus for calling for help in autoclave |
| CN207365558U (en) * | 2017-10-20 | 2018-05-15 | 中山凯旋真空科技股份有限公司 | safety device and vacuum drying tank for vacuum drying tank |
-
2017
- 2017-10-20 CN CN201710982637.9A patent/CN108253735B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101211492A (en) * | 2006-12-26 | 2008-07-02 | 乐金电子(中国)研究开发中心有限公司 | Article anti-theft method, burglar proof mobile communication terminal and theftproof system |
| CN201421804Y (en) * | 2009-03-06 | 2010-03-10 | 崔志君 | Balance type displacement sensor |
| CN203444624U (en) * | 2013-07-16 | 2014-02-19 | 山东众泰达工业装备有限公司 | Safe apparatus for calling for help in autoclave |
| CN207365558U (en) * | 2017-10-20 | 2018-05-15 | 中山凯旋真空科技股份有限公司 | safety device and vacuum drying tank for vacuum drying tank |
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| Publication number | Publication date |
|---|---|
| CN108253735A (en) | 2018-07-06 |
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Inventor after: Zheng Zhihai Inventor after: Li Changan Inventor after: Luo Zhenjiang Inventor after: Zeng Maosong Inventor before: Li Changan Inventor before: Luo Zhenjiang Inventor before: Zeng Maosong Inventor before: Zheng Qingqiang |
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