Hot chamber shielding door

Abstract

The utility model provides a hot chamber shielding door, and particularly relates to the field of shielding and sealing. The hot chamber shielding door comprises a door body, a driving device, a conversion device, a transmission device, an encoder and an electric control cabinet. The door body is slidably mounted on a door frame of the hot chamber; the driving device drives the door body to slide along the bottom of the door frame; the conversion device comprises a first conversion piece, a second conversion piece and a conversion shaft, the first conversion piece is fixedly connected with an output shaft of the driving device, the second conversion piece is in transmission connection with the first conversion piece, and the conversion shaft penetrates through the second conversion piece and is fixedly connected with the second conversion piece; the input end of the transmission device is connected with the conversion shaft, and the output end is fixedly connected with the door body; the encoder is mounted at one end, deviating from the transmission device, of the conversion shaft; the electric control cabinet comprises a controller, and the driving device and the encoder are electrically connected with the controller. According to the hot chamber shielding door, the moving speed of the door body is controlled by controlling the running speed of the driving device, so that the opening and closing precision of the door body is improved, and the sealing performance of a hot chamber is improved.

Description

Technical Field

[0001] The utility model relates to the field of shielding and sealing, in particular to a hot room shielding door. Background Art

[0002] Nuclear power hot chamber is a special area in nuclear power plants and nuclear fuel reprocessing facilities. It provides a shielded, sealed, ventilated and isolated environment to meet the needs of workers to operate radioactive materials. Nuclear power hot chamber shielding door is an important safety barrier used in nuclear facilities to prevent the leakage of radioactive materials and radiation. It is usually installed inside the hot chamber to control the entry and exit of personnel and equipment, while providing necessary radiation protection. Sliding shielding doors are more common because they can slide and open and close smoothly on the track, which can reduce the mechanical stress of the door body during the opening and closing process, thereby improving its durability and reliability. However, due to the large size of the door body and the large stroke when opening and closing, the inertia generated during operation is large, and the precise positioning of the opening and closing is very difficult. Utility Model Content

[0003] In view of the above shortcomings of the prior art, the utility model provides a hot chamber shielding door to improve the problem that the shielding door has large inertia and is difficult to accurately position.

[0004] In order to achieve the above-mentioned purpose and other related purposes, the utility model provides a hot chamber shielding door, which includes a door body, a driving device, a conversion device, a transmission device, an encoder and an electric control cabinet. The door body is slidably mounted on the door frame of the hot chamber; the driving device drives the door body to slide along the bottom of the door frame; the conversion device includes a first conversion member, a second conversion member and a conversion shaft, the first conversion member is fixedly connected to the output shaft of the driving device, the second conversion member is transmission-connected to the first conversion member, the conversion shaft passes through the second conversion member and is fixedly connected to the second conversion member; the input end of the transmission device is connected to the conversion shaft, and the output end is fixedly connected to the door body; the encoder is mounted on the end of the conversion shaft away from the transmission device; the electric control cabinet includes a controller, and the driving device and the encoder are electrically connected to the controller respectively.

[0005] In an example of the present invention, a slide rail is disposed at the bottom of the door frame, and a pulley matched with the slide rail is disposed on the door body.

[0006] In one example of the utility model, the transmission device includes a screw-slider mechanism, a thread is provided at one end of the conversion shaft close to the screw, a worm gear matching the thread is provided at one end of the screw close to the conversion shaft, the worm gear is mounted on the screw and fixedly connected to the screw, the other end of the screw is threadedly connected to the slider, and the end of the slider facing away from the conversion shaft is fixedly connected to the door body.

[0007] In an example of the present invention, support members are further provided on both sides of the lead screw, and the support members are provided below the slider to support the slider.

[0008] In an example of the present invention, the driving device is an AC motor, and a frequency converter is connected in series to the power supply circuit of the AC motor.

[0009] In an example of the present invention, a limit switch is provided on the transmission device, and the limit switch is electrically connected to the controller.

[0010] In an example of the present invention, the limit switch includes a first switch and a second switch, and the outer side of the screw-slider mechanism is covered with a housing, and the first switch and the second switch are arranged side by side on the housing along the axial direction of the screw.

[0011] In an example of the present invention, a hand wheel is fixedly mounted on one end of the conversion shaft away from the conversion device.

[0012] In an example of the present invention, the first conversion member and the second conversion member are bevel gears, and the first conversion member is meshed with the second conversion member.

[0013] In an example of the present invention, the hot chamber shielding door further includes a control button, and the control button is electrically connected to the controller.

[0014] The heat chamber shielding door of the utility model connects the driving device with the transmission device through the conversion device, and an encoder electrically connected to the controller is arranged on the conversion shaft. The encoder detects the rotation rate and number of rotations of the conversion shaft in real time, and transmits the data to the controller, which converts the above data into the movement displacement of the door body, and controls the operation rate of the driving device according to the movement distance of the door body, so as to adjust the movement speed of the door body, reduce the inertia of the door body when opening and closing, improve the opening and closing accuracy of the door body, and further improve the sealing of the heat chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic structural diagram of a hot chamber shielding door in one embodiment of the present invention.

[0017] Component number description

[0018] 100, door body; 200, driving device; 210, output shaft; 220, hand wheel; 300, conversion device; 310, conversion shaft; 400, transmission device; 410, housing; 500, encoder; 600, limit switch; 610, first switch; 620, second switch. DETAILED DESCRIPTION

[0019] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and the features in the embodiments can be combined with each other without conflict. It should also be understood that the terms used in the embodiments of the present invention are intended to describe specific implementation schemes, rather than to limit the scope of protection of the present invention. The test methods for which specific conditions are not specified in the following examples are usually carried out under conventional conditions or under the conditions recommended by the manufacturers.

[0020] It should be noted that the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present utility model. Changes or adjustments to their relative relationships should be regarded as the scope of implementation of the present utility model without substantially changing the technical content.

[0021] See also Figure 1 The utility model provides a hot chamber shielding door, which includes a door body 100, a driving device 200, a conversion device 300, a transmission device 400, an encoder 500 and an electric control cabinet (not shown in the figure). A controller is arranged in the electric control cabinet, and the driving device 200 and the encoder 500 are electrically connected to the controller respectively. The controller realizes the opening and closing of the door body 100 by controlling the operation of the driving device 200, and the controller can monitor the moving distance of the door body 100 through the encoder 500, and further control the sliding speed of the door body 100 by controlling the operating speed of the driving device 200, so as to reduce the inertia of the door body 100 when opening and closing, and improve the opening and closing accuracy of the door body 100.

[0022] See also Figure 1 The door body 100 is slidably mounted on the door frame of the hot room to control the entry and exit of personnel and equipment and provide necessary radiation protection. The size of the door body 100 is not limited here and can be adjusted according to actual needs. The door body 100 can be mounted on the side wall of the hot room in any slidable manner. Exemplarily, a slide rail is provided at the bottom of the door frame, and a pulley matching the slide rail is provided on the door body 100.

[0023] The driving device 200 is used to drive the door body 100 to slide along the bottom of the door frame. The driving device 200 can be any device that can provide continuous torque output, for example, the driving device 200 can be a DC motor or an AC motor. In one embodiment, the driving device 200 is an AC motor. Furthermore, a frequency converter is connected in series to the power supply circuit of the AC motor, and the frequency converter adjusts the speed and torque of the AC motor by adjusting the voltage and frequency of the output power supply, thereby realizing the control of the opening and closing speed of the door body 100.

[0024] The conversion device 300 includes a first conversion member, a second conversion member and a conversion shaft 310. The first conversion member is fixedly connected to the output shaft 210 of the driving device 200, the second conversion member is drivingly connected to the first conversion member, and the conversion shaft 310 passes through the second conversion member and is fixedly connected to the second conversion member. The first conversion member and the second conversion member transmit the torque of the output shaft 210 of the driving device 200 to the conversion shaft 310. The angle between the output shaft 210 and the conversion shaft 310 is not limited here. In one embodiment, the conversion shaft 310 is perpendicular to the output shaft 210.

[0025] See also Figure 1 , the first conversion member and the second conversion member are any devices that can transfer the torque of the output shaft 210 to the conversion shaft 310. In one embodiment, the output shaft 210 and the conversion shaft 310 are gear-driven, the first conversion member and the second conversion member are bevel gears, and the first conversion member is meshed with the second conversion member. In other embodiments, it can also be a worm gear transmission between the output shaft 210 and the conversion shaft 310, then the first conversion member is a worm, and the second conversion member is a worm wheel matched with the worm. In the present application, there is no restriction on the transmission ratio between the output shaft 210 and the conversion shaft 310, and it is adjusted according to actual needs. Exemplarily, the transmission ratio between the output shaft 210 and the conversion shaft 310 is 1:1.

[0026] See also Figure 1, the transmission device 400 is used to transmit the driving force of the driving device 200 to the door body 100, so as to realize the sliding of the door body 100 along the bottom of the door frame. The input end of the transmission device 400 is connected to the conversion shaft 310, and the output end of the transmission device 400 is fixedly connected to the door body 100. In one embodiment, the transmission device 400 includes a lead screw-slider mechanism, and the lead screw and the conversion shaft 310 are threadedly transmitted. Specifically, the conversion shaft 310 is provided with a thread on the side close to the lead screw, and the end of the lead screw close to the conversion shaft 310 is provided with a worm gear matching the thread, the worm gear is sleeved on the lead screw and fixedly connected to the lead screw, and the end of the slider away from the conversion shaft 310 is fixedly connected to the door body 100. In other embodiments, the conversion shaft 310 and the lead screw can also be geared. There is no restriction on the transmission ratio between the conversion shaft 310 and the lead screw, and it is adjusted according to actual needs. For example, the transmission ratio between the conversion shaft 310 and the lead screw is 1:1. Furthermore, support members are provided on both sides of the lead screw, and the support members are provided below the slider to support the slider and prevent the slider from being deflected due to gravity.

[0027] See also Figure 1 In one embodiment, a human-machine interface is provided on the electric control cabinet, which is used to set the deceleration position and the stop position when the door body 100 is opened and closed. Specifically, the encoder 500 is installed at the end of the conversion shaft 310 away from the transmission device 400, and is used to detect the rotation speed of the conversion shaft 310 and the number of revolutions of the conversion shaft 310. The controller converts the number of revolutions of the conversion shaft 310 output by the encoder 500 into the slider stroke through the correspondence between the number of revolutions of the conversion shaft 310 and the moving distance of the slider. When controlling the opening and closing of the door body 100, the slider stroke when the door body 100 is decelerated and the slider stroke when the door body 100 is stopped are input on the human-machine interface, and the door body 100 can be decelerated or stopped at the corresponding position, and the inertia of the door body 100 is reduced by reducing the sliding speed of the door body 100. Here, the slider stroke corresponding to the deceleration and stop of the door body 100 is adjusted according to the weight and total stroke of the door body 100. For example, when the weight of the door body 100 is large, the deceleration can be performed when the distance from the fully opened and closed position of the door body 100 is large, so as to reduce the inertia when the door body 100 is fully opened and closed, and improve the opening and closing accuracy of the door body 100. Furthermore, the encoder 500 is an absolute encoder, and after power failure or restart, it can continue to control the opening or closing of the door body 100 at the current position without recalibration or returning to the starting point.

[0028] See also Figure 1In one embodiment, a limit switch 600 is provided on the transmission device 400, and the limit switch 600 is electrically connected to the controller to prevent the encoder 500 from malfunctioning when the door body 100 is opened and closed, resulting in excessive opening and closing of the door body 100. The limit switch 600 includes a first switch 610 and a second switch 620, and the outer side of the lead screw-slider mechanism is fitted with a housing 410, and the first switch 610 and the second switch 620 are arranged side by side on the housing 410 along the axial direction of the lead screw. There is no restriction on the type of limit switch 600 here, such as a mechanical limit switch, an electronic induction limit switch or a photoelectric limit switch. In this embodiment, the limit switch 600 uses a mechanical limit switch of a swing rod trigger type. Specifically, the limit switch 600 includes a swing rod, and a protrusion that matches the swing rod is provided on the slider. When the protrusion touches the swing rod, the movement of the swing rod triggers the action of the internal switch, and the controller receives the signal to disconnect the line, and the door body 100 stops running. The first switch 610 is a protection switch when the door body 100 is open, and the second switch 620 is a protection switch when the door body 100 is closed.

[0029] See also Figure 1 In one embodiment, the hot chamber shielding door further includes an alarm device, which is electrically connected to the controller. When a fault occurs in the drive device 200, the encoder 500 or the limit switch 600, the alarm device operates and the entire control circuit is powered off, and the drive device 200 stops operating. There is no restriction on the type of alarm device here, and the alarm device can be any device that can alert the operator. Exemplarily, the alarm device can be a warning light, and when there is a fault, the warning light flashes or changes color to alert the operator; the alarm device can also be a buzzer or an alarm, which emits a sound signal when a fault occurs, making it easier to attract the attention of the operator. There is no restriction on the installation location of the alarm device, as long as it is convenient for the operator to find the fault in time.

[0030] See also Figure 1 In one embodiment, the hot chamber shielding door further includes a control button, which can be installed on the outside of the hot chamber wall or on any convenient touch and press position such as an electric control cabinet. The control button includes a door opening button and a door closing button, which are electrically connected to the controller respectively. When the door opening button is pressed, the controller sends a door opening signal, and the driving device 200 opens the door body 100 through the transmission device 400; when the door closing button is pressed, the controller sends a door closing signal, and the driving device 200 closes the door body 100 through the transmission device 400.

[0031] Furthermore, the control buttons also include an emergency stop button. Pressing the emergency stop button can render all other operating buttons ineffective, thereby preventing accidents caused by accidental touches during actual operation.

[0032] Furthermore, a hand wheel 220 is fixedly mounted on one end of the output shaft 210 away from the conversion device 300. When the shielding door fails, the power supply is cut off and the hand wheel 220 is rotated to drive the door body 100, thereby repairing various components.

[0033] The operation process of the shielding door in the present application is as follows: when closing the door, pressing the door closing button triggers the controller to issue a door closing command, the driving device 200 starts to operate, and the output shaft 210 of the driving device 200 drives the lead screw to rotate through the conversion device 300. At this time, the slider moves along the lead screw toward the end close to the door body 100, and the encoder 500 monitors the rotation speed of the conversion shaft 310 and the number of turns of the conversion shaft 310 in real time and sends the data to the controller, which converts it into the moving distance of the door body 100. When the moving distance of the door body 100 reaches the preset deceleration position, the controller reduces the speed of the output shaft 210 through the frequency converter to achieve a decrease in the speed of the lead screw, further reducing the moving speed of the door body 100, thereby reducing the inertia of the door body 100. When the moving distance of the door body 100 reaches the preset stop position, the controller controls the driving device 200 to stop running. The operation process of opening the door is the same as that of closing the door, and will not be repeated here.

[0034] The heat chamber shielding door of the utility model is connected to the driving device and the transmission device through the conversion device, and an encoder electrically connected to the controller is arranged on the conversion shaft. The encoder detects the rotation rate and the number of rotations of the conversion shaft in real time, and transmits the data to the controller, which converts the above data into the movement displacement of the door body, and controls the operation rate of the driving device according to the movement distance of the door body, so as to adjust the movement speed of the door body, reduce the inertia of the door body when opening and closing, improve the opening and closing accuracy of the door body, and further improve the sealing of the heat chamber. Therefore, the utility model effectively overcomes some practical problems in the prior art and has high utilization value and use significance.

[0035] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A hot room shielding door, characterized in that: include: The door body is slidably mounted on the door frame of the hot chamber; A driving device, driving the door body to slide along the bottom of the door frame; The conversion device comprises a first conversion member, a second conversion member and a conversion shaft, wherein the first conversion member is fixedly connected to the output shaft of the driving device, the second conversion member is drivingly connected to the first conversion member, and the conversion shaft passes through the second conversion member and is fixedly connected to the second conversion member; A transmission device, the input end of which is connected to the conversion shaft, and the output end of which is fixedly connected to the door body; An encoder is mounted on an end of the conversion shaft away from the transmission device; The electric control cabinet comprises a controller, and the driving device and the encoder are electrically connected to the controller respectively.

2. The hot chamber shielding door according to claim 1, characterized in that: A slide rail is arranged at the bottom of the door frame, and a pulley matched with the slide rail is arranged on the door body.

3. The hot chamber shielding door according to claim 1, characterized in that: The driving device is an AC motor, and a frequency converter is connected in series to the power supply circuit of the AC motor.

4. The hot chamber shielding door according to claim 1, characterized in that: The transmission device is provided with a limit switch, and the limit switch is electrically connected to the controller.

5. The hot chamber shielding door according to claim 1, characterized in that: A hand wheel is fixedly mounted on one end of the conversion shaft away from the conversion device.

6. The hot chamber shielding door according to claim 1, characterized in that: The first conversion member and the second conversion member are bevel gears, and the first conversion member is meshed with the second conversion member.

7. The hot chamber shielding door according to claim 1, characterized in that: The hot chamber shielding door further comprises a control button, and the control button is electrically connected to the controller.

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