Feed block device and method of controlling the same

Abstract

The application discloses a kind of feed blocking device and its control method, the device includes base, pivot, blocking piece, be equipped with first limit and second limit of rotary flange, including drive mechanism and first limit piece of limit mechanism, detection unit and control unit of the position of detecting rotary flange;When rotary flange is at upper locking point, first limit piece cooperates with first limit to limit rotary flange, so that blocking piece is lifted and ash inlet is opened;When rotary flange is at lower locking point, first limit piece cooperates with second limit to limit rotary flange, so that blocking piece falls and ash inlet is closed;When rotary flange is between upper locking point and lower locking point, first limit piece does not cooperate with first limit and second limit, so that blocking piece is automatically back under the action of gravity.Far from damaging connecting pipe, the application will not be burned due to locked-rotor of drive mechanism, and blocking rod will not be bent and deformed, which greatly improves safety.

Description

Technical Field

[0001] This invention belongs to the technical field of safe feeding equipment, and particularly relates to a feeding blocking device and its control method. Background Technology

[0002] A concrete batching plant is a combined unit used for centralized mixing of concrete, also known as a concrete precast yard. Due to its high degree of mechanization and automation, it has a high productivity and can ensure the quality of concrete and save cement. It is often used in large and medium-sized water conservancy, power, bridge and other projects with large concrete volumes, long construction periods and concentrated construction sites.

[0003] Concrete mixing plants are typically equipped with multiple powder silos for storing cement, mineral powder, fly ash, expanding agents, and other powdered materials. These powders are stored separately in different silos. When the powder in a silo is nearly depleted and needs replenishment, a cement truck connects to the silo's inlet pipe via a pipeline, and the powder is delivered to the silo using high-pressure gas conveying. Figure 1 As shown.

[0004] Because cement mixing plants are equipped with multiple powder silos, each storing different powders that cannot be mixed, cement truck drivers are prone to dispensing the wrong powder, rendering the entire silo unusable. To prevent this, some mixing plants install a key lock at the powder silo's ash inlet; the driver must unlock the key to open the inlet for dispensing. To better facilitate information management, electromechanical ash inlet barriers have gradually emerged. Common barriers use a rotary motor to move the inlet baffle. After the driver swipes their card, the baffle slowly opens under the motor's drive; after dispensing, the driver removes the card, and the baffle slowly closes under the motor's drive.

[0005] Examples include a dust inlet pipe access lock for powder silos with a rotating shaft designed to prevent dust ingress (publication number CN214404679U) and a new type of dust inlet pipe access lock for powder silos (publication number CN211520992U). This type of dust inlet pipe access lock is motor-driven. When there is an obstruction at the dust inlet (e.g., the connecting pipe is not disconnected), a malfunction in the motor could damage the connecting pipe, cause the motor to stall and burn out, and result in the bending and deformation of the baffle plate connected to the motor. The motor itself is relatively expensive, contains internal electromechanical components, and has a certain failure rate over long-term use, leading to increased maintenance costs. Furthermore, the motor requires explicit opening and closing commands (usually generated by swiping a card), and especially requires manual verification to ensure there are no obstructions before closing.

[0006] For example, a safety feeding system (publication number CN108750706A) essentially replaces the mechanical lock with an electronic lock. When the blocker is lowered, it blocks the ash inlet, and when it is raised, it opens the ash inlet. After the electronic lock is opened, the blocker can be raised or lowered manually or by a motor. Each step requires manual operation, and there is a possibility that the ash inlet may be forgotten to be closed. Summary of the Invention

[0007] The purpose of this invention is to provide a feeding blocking device and its control method to solve the problems of traditional motor-driven ash inlet pipe access locks, which are prone to damage to connecting pipes, motor burnout, and bending and deformation of the blocking plate connected to the motor due to motor malfunctions.

[0008] The present invention solves the above-mentioned technical problems through the following technical solution: a feed blocking device, fixed on the ash inlet pipe of a powder silo, the feed blocking device comprising:

[0009] Base;

[0010] A pivot is rotatably mounted on the base;

[0011] A blocking component, one end of which is fixed to the rotating shaft, and the other end of which is used to close or open the ash inlet;

[0012] A rotating flange is fixed on the rotating shaft, and the rotating flange is provided with at least a first limiting part and a second limiting part;

[0013] A limiting mechanism includes a driving mechanism and a first limiting member. The driving mechanism is disposed on the base and connected to the first limiting member. The first limiting member is disposed on the base and matches a first limiting part and a second limiting part.

[0014] A detection unit is used to detect the position of the rotating flange;

[0015] The control unit is electrically connected to the detection unit and the drive mechanism, respectively.

[0016] When the rotating flange is at the upper locking point, the control unit controls the first limiting member to cooperate with the first limiting part through the drive mechanism to restrict the rotating flange, causing the blocking member to lift and open the ash inlet; when the rotating flange is at the lower locking point, the control unit controls the first limiting member to cooperate with the second limiting part through the drive mechanism to restrict the rotating flange, causing the blocking member to fall and close the ash inlet; when the rotating flange is between the upper and lower locking points, the control unit controls the first limiting member to not cooperate with either the first or second limiting part through the drive mechanism, causing the blocking member to automatically fall back under the action of gravity.

[0017] Furthermore, the driving mechanism is an electromagnet driving mechanism or a motor driving mechanism.

[0018] Furthermore, the first limiting member is a rotating block, one end of which is rotatably disposed on the base, and the other end is movably connected to the driving mechanism. A third limiting part is provided on the rotating block to match the first limiting part and the second limiting part.

[0019] Furthermore, the first limiting member includes a guide sleeve and a pin; the guide sleeve is fixed on the base, the pin is inserted into the guide sleeve, and one end of the pin is connected to the driving mechanism, while the other end is matched with the first limiting part and the second limiting part.

[0020] Furthermore, the detection unit is an angle sensor, which is disposed on the rotating flange and used to detect the rotation angle of the rotating flange, so as to determine the position of the rotating flange based on the rotation angle.

[0021] Furthermore, the detection unit includes a first sensor, a second sensor, and a proximity sensor electrically connected to the control unit; the proximity sensor is disposed on the base, and the first sensor and the second sensor are respectively disposed on the rotating flange; when the first sensor activates the proximity sensor, the rotating flange is at the upper locking point, and when the second sensor activates the proximity sensor, the rotating flange is at the lower locking point.

[0022] Furthermore, a fourth limiting part is provided on the rotating flange, and a second limiting member is provided on the base. The second limiting member is located inside the fourth limiting part, and when the rotating flange is at the upper locking point, the second limiting member is located at the lower limit position of the fourth limiting part, and when the rotating flange is at the lower locking point, the second limiting member is located at the upper limit position of the fourth limiting part.

[0023] Furthermore, a one-way damper is provided between the base and the pivot to limit the falling speed of the blocking member.

[0024] Furthermore, a feed sensor electrically connected to the control unit is provided at the ash inlet to determine whether the material is being discharged based on the data collected by the feed sensor.

[0025] Furthermore, a protective cover is provided on the base, and the protective cover and the base form a sealed cavity, in which the rotating flange, the limiting mechanism and the detection unit are located.

[0026] Furthermore, an indicator light electrically connected to the control unit is provided on the protective cover.

[0027] Based on the same concept, the present invention also provides a control method for the feed blocking device as described above, the method including an ash inlet opening step and a closing step, the ash inlet opening step including:

[0028] The drive mechanism is controlled to move according to the received opening control command, so that the first limit member retracts and the first limit member disengages from / does not cooperate with the second limit part;

[0029] Manually raise the blocking component and acquire the position information of the rotating flange collected by the detection unit;

[0030] When the rotating flange is at the upper locking point, the drive mechanism causes the first limiting member to cooperate with the first limiting part to restrict the rotating flange, causing the blocking member to be lifted and the ash inlet to be opened.

[0031] When the material feeding state is not in operation or the feeding time exceeds the set time, the ash inlet closing step is executed, which includes:

[0032] The drive mechanism is controlled to move according to the received closing control command, so that the first limit member retracts and the first limit member disengages from / does not cooperate with the first limit part;

[0033] The blocking component automatically falls back under the action of gravity and acquires the position information of the rotating flange collected by the detection unit;

[0034] When the rotating flange is at the lower locking point, the drive mechanism causes the first limiting member to engage with the second limiting part to restrict the rotating flange, causing the blocking member to fall.

[0035] Beneficial effects

[0036] Compared with the prior art, the advantages of the present invention are as follows:

[0037] When the rotating flange of this invention is at the upper locking point, the first limiting member cooperates with the first limiting part of the rotating flange to lock the blocking rod and open the ash inlet. When the rotating flange is at the lower locking point, the first limiting member cooperates with the second limiting part of the rotating flange to lock the blocking rod and close the ash inlet. When the rotating flange is between the upper and lower locking points, the drive mechanism does not operate, the first limiting member does not restrict the rotating flange, and the blocking rod automatically falls back under gravity. Even if the connecting pipe is connected to the ash inlet pipe, the automatic fall of the blocking rod will not affect the feeding, will not damage the connecting pipe, will not cause the drive mechanism to burn out due to stalling, and will not bend or deform, greatly improving safety.

[0038] This invention is simple to use, robust and reliable, and inexpensive. Attached Figure Description

[0039] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only one embodiment of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a schematic diagram of the powder silo structure in the background art of this invention;

[0041] Figure 2 This is a perspective view of the feed blocking device in Embodiment 1 of the present invention;

[0042] Figure 3 This is a plan view of the feed blocking device in Embodiment 1 of the present invention;

[0043] Figure 4 This is a schematic diagram of the installation of the feed blocking device in Embodiment 1 of the present invention;

[0044] Figure 5 This is a schematic diagram of the rotating flange structure in Embodiment 1 of the present invention;

[0045] Figure 6 This is a schematic diagram of the feed blocking device structure when the rotating flange is at the upper locking point in Embodiment 1 of the present invention;

[0046] Figure 7 This is a schematic diagram of the feed blocking device structure when the rotating flange is at the lower locking point in Embodiment 1 of the present invention;

[0047] Figure 8 This is a schematic diagram of the protective cover structure in Embodiment 1 of the present invention;

[0048] Figure 9 This is a perspective view of the feed blocking device in Embodiment 2 of the present invention;

[0049] Figure 10 This is a perspective view of the feed blocking device when the rotating flange is at the upper locking point in Embodiment 2 of the present invention;

[0050] Figure 11 This is a plan view of the feed blocking device when the rotating flange is at the upper locking point in Embodiment 2 of the present invention;

[0051] Figure 12 This is a plan view of the feed blocking device when the rotating flange is at the lower locking point in Embodiment 2 of the present invention.

[0052] Among them, 100-Powder hopper, 200-Ash inlet pipe, 210-Ash inlet, 300-Feed blocking device, 310-Base, 311-Limiting block, 312-Clamp, 313-Protective cover, 314-Indicator light, 320-Blocking rod, 330-Electromagnetic drive mechanism, 331-Pin, 332-Iron core, 340-Rotating shaft, 350-Rotating flange, 351-First limiting part, 352-Second limiting part, 353-Fourth limiting part, 360-Rotating block, 361-Third limiting part, 370-Angle sensor, 380-Guide sleeve, 390-Pin, 391-Connecting block. Detailed Implementation

[0053] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0054] The technical solutions of this application will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0055] Example 1

[0056] like Figures 2-5 As shown, the feed blocking device 300 provided in this embodiment of the invention includes a base 310, a rotating shaft 340, a blocking rod 320, a rotating flange 350, a limiting mechanism, a detection unit, and a control unit. The base 310 is fixedly mounted on the ash inlet pipe 200 of the powder silo by a clamp 312. The rotating shaft 340 is rotatably mounted on the base 310. One end of the blocking rod 320 is fixed to the rotating shaft 340, and the other end is used to close or open the ash inlet. The rotating flange 350 is fixed to the rotating shaft 340, and the rotating flange 350 is provided with a first limiting part 351 and a second limiting part 352. The limiting mechanism includes a drive mechanism and a rotating block 360. The drive mechanism is mounted on the base 310 and is movably connected to one end of the rotating block 360 via a pin 331. The other end of the rotating block 360 is rotatably mounted on the base 310. A third limiting part 361 is provided on the rotating block 360 to match the first limiting part 351 and the second limiting part 352. The detection unit is an angle sensor 370, which is mounted on the rotating flange 350 and is used to detect the rotation angle of the rotating flange 350. The control unit is electrically connected to the angle sensor 370 and the drive mechanism, respectively.

[0057] Angle sensor 370 detects the rotation angle of rotary flange 350 and determines the position of rotary flange 350 based on the rotation angle. When rotary flange 350 is at the upper locking point (e.g.) Figure 6 When the rotating block 360 is in the lower locking position (as shown), the control unit controls the third limiting part 361 of the rotating block 360 to cooperate with the first limiting part 351 through the drive mechanism, thereby restricting the rotation of the rotating flange 350, thus restricting the rotation of the rotating shaft 340, causing the blocking rod 320 to be raised and the ash inlet to be opened; when the rotating flange 35 ... Figure 7 When the rotating block 360 is in the position shown, the control unit controls the third limiting part 361 of the rotating block 360 to cooperate with the second limiting part 352 through the drive mechanism, thereby restricting the rotation of the rotating flange 350, thus restricting the rotation of the rotating shaft 340, causing the blocking rod 320 to fall and close the ash inlet; when the rotating flange 350 is between the upper locking point and the lower locking point, the control unit controls the third limiting part 361 of the rotating block 360 to not cooperate with the first limiting part 351 and the second limiting part 352 through the drive mechanism, so that the blocking rod 320 automatically falls back under the action of gravity.

[0058] During the commissioning of the feed blocking device 300, raising the blocking rod 320 until the third limiting part 361 of the rotating block 360 engages with the first limiting part 351 of the rotating flange 350 determines the position of the upper locking point. Simultaneously, the angle sensor 370 detects the rotation angle of the rotating flange 350 when it is at the upper locking point, and stores this rotation angle as a first angle threshold in the control unit. Similarly, lowering the blocking rod 320 until the third limiting part 361 of the rotating block 360 engages with the second limiting part 352 of the rotating flange 350 determines the position of the lower locking point. Again, the angle sensor 370 detects the rotation angle of the rotating flange 350 when it is at the lower locking point, and stores this rotation angle as a second angle threshold in the control unit. When the feed blocking device 300 is in operation, the control unit compares the rotation angle collected by the angle sensor 370 with the first and second angle thresholds to determine whether the rotating flange 350 is at the upper locking point, the lower locking point, or between the upper and lower locking points.

[0059] When the device of this invention is working, the blocking rod 320 can be manually raised first. When the rotating flange 350 is at the upper locking point, the control unit uses the drive mechanism to make the third limiting part 361 of the rotating block 360 engage with the first limiting part 351 of the rotating flange 350, opening the ash inlet. The cement truck is then connected to the ash inlet pipe 200 through the connecting pipe, and the powder is sent into the powder silo (in the feeding state). When it is not in the feeding state or the statistical feeding time is longer than the set time, the control unit uses the drive mechanism to make the third limiting part 361 of the rotating block 360 disengage from the first limiting part 351 of the rotating flange 350. The blocking rod 320 automatically falls back under the action of gravity. When the blocking rod 320 falls back to the lower locking point, the control unit uses the drive mechanism to make the third limiting part 361 of the rotating block 360 engage with the second limiting part 352 of the rotating flange 350, closing the ash inlet and locking the blocking rod 320 to prevent illegal ash feeding. During the automatic retraction of the blocking rod 320 under gravity (i.e., when the rotating flange 350 is between the upper and lower locking points), the drive mechanism does not operate. Even if the connecting pipe is connected to the ash inlet pipe 200, the automatic retraction of the blocking rod 320 will not affect material feeding, nor will it damage the connecting pipe, nor will it cause the drive mechanism to burn out due to stalling. The blocking rod 320 will not bend or deform. When the connecting pipe is disengaged from the ash inlet pipe 200, and the blocking rod 320 retracts to the lower locking point, the drive mechanism then controls the third limiting part 361 of the rotating block 360 to engage with the second limiting part 352 of the rotating flange 350, closing the ash inlet and locking the blocking rod 320. The entire operation of the device is safe and reliable.

[0060] A feed sensor electrically connected to the control unit is installed at the ash inlet. The feed sensor contains an accelerometer or temperature sensor to detect vibration or temperature in the ash inlet pipe 200. When the cement truck feeds material into the ash inlet pipe 200, significant vibration is generated; this vibration is sensed to determine if feeding is in progress. Simultaneously, the temperature of the ash inlet pipe 200 rises noticeably, typically reaching 50-60°C; this temperature change on the surface of the ash inlet pipe 200 is also sensed to determine if feeding is in progress. The feeding time begins when the ash inlet opens. The control unit tracks the feeding time, and when the set time (e.g., 5 minutes) is reached, regardless of whether the device is authorized or unauthorized, and regardless of whether a connecting pipe is connected to the ash inlet, the control unit will automatically lower the stop bar 320, greatly improving safety. The stop bar 320 will automatically close regardless of whether the driver forgets to close it. This effect is not possible with other motor-driven stoppers; if a connecting pipe is connected, a forced closure by the motor could damage the motor, connecting pipe, or stop bar 320, requiring manual operation by the driver.

[0061] In one specific embodiment of the present invention, the driving mechanism is an electromagnet driving mechanism 330 or a linear motor driving mechanism, preferably an electromagnet driving mechanism 330. The control unit controls the operation of the electromagnet driving mechanism 330 through current. When the control unit outputs current to the electromagnet driving mechanism 330, the electromagnet driving mechanism 330 drives the rotating block 360 to move; when the control unit does not output current to the electromagnet driving mechanism 330, the electromagnet driving mechanism 330 does not move. The electromagnet driving mechanism 330 generates electromagnetic force by controlling the current, thereby causing its iron core 332 to extend or retract. When the iron core 332 extends, it drives the rotating block 360 to approach the rotating flange 350, thereby causing the third limiting part 361 of the rotating block 360 to cooperate with the first limiting part 351 or the second limiting part 352 of the rotating flange 350; when the iron core 332 retracts, it drives the rotating block 360 away from the rotating flange 350, and the blocking rod 320 falls freely back. The electromagnet driving mechanism 330 has the advantages of low cost, low failure rate, and low maintenance cost.

[0062] One implementation of the detection unit is an angle sensor 370, which can also be a non-contact Hall sensor, a magnetoresistive angle sensor 370, a photoelectric encoder, etc. Another implementation of the detection unit is as follows: the detection unit includes a first sensing element, a second sensing element, and a proximity sensor electrically connected to the control unit; the proximity sensor is disposed on the base 310, and the first and second sensing elements are respectively disposed on the rotating flange 350; when the first sensing element activates the proximity sensor, it indicates that the rotating flange 350 is at the upper locking point, and when the second sensing element activates the proximity sensor, it indicates that the rotating flange 350 is at the lower locking point, thereby determining the position of the rotating flange 350 based on the activation signal of the proximity sensor, and then controlling the operation of the drive mechanism.

[0063] In one specific embodiment of the present invention, a fourth limiting part 353 is provided on the rotating flange 350, and a limiting block 311 is provided on the base 310. The limiting block 311 is located within the fourth limiting part 353, and when the rotating flange 350 is at the upper locking point, the limiting block 311 is located at the lower limit position of the fourth limiting part 353 (e.g., Figure 6 As shown), when the rotary flange 350 is at the lower locking point, the limit block 311 is located at the upper limit position of the fourth limit part 353 (as shown). Figure 7 (As shown). The movement range of the blocking rod 320 is limited by the fourth limiting part 353 and the limiting block 311, ensuring that the movement of the blocking rod 320 does not exceed the upper locking point and the lower locking point, and ensuring that the automatic falling movement of the blocking rod 320 can be realized normally.

[0064] In one specific embodiment of the present invention, a one-way damper is provided between the base 310 and the rotating shaft 340 to limit the falling speed of the blocking rod 320. By limiting the falling speed of the blocking rod 320 by the one-way damper, the force of the blocking rod 320 falling on the connecting pipe is reduced when the connecting pipe is not disengaged from the ash inlet pipe 200, further avoiding damage to the connecting pipe; when the blocking rod 320 is raised, there is no damping, so it can be raised quickly.

[0065] In one specific embodiment of the present invention, such as Figure 8 As shown, a protective cover 313 is provided on the base 310. The protective cover 313 and the base 310 form a sealed cavity. The rotating flange 350, the limiting mechanism, and the detection unit are located in the sealed cavity. The protective cover 313 serves to prevent dust and provide protection. An indicator light 314 electrically connected to the control unit is provided on the protective cover 313. When the device is not authorized for use and the blocking rod 320 is at the lower locking point, the indicator light 314 is off. When the device is not authorized for use and the blocking rod 320 is at the upper locking point, it indicates an illegal state. The control unit automatically controls the iron core 332 to retract, the blocking rod 320 to automatically fall back, and the indicator light 314 flashes rapidly as a warning. When the device is authorized and the blocking rod 320 is at the lower locking point, the indicator light 314 flashes slowly, indicating that the device is authorized and can be started. When the device is authorized and leaves the lower locking point, the indicator light 314 remains on, indicating that the ash feeding operation is in progress.

[0066] Example 2

[0067] like Figure 9 As shown, the feed blocking device 300 provided in this embodiment of the invention includes a base 310, a rotating shaft 340, a blocking rod 320, a rotating flange 350, a limiting mechanism, a detection unit, and a control unit. The base 310 is fixedly mounted on the ash inlet pipe 200 of the powder silo by a clamp 312. The rotating shaft 340 is rotatably mounted on the base 310. One end of the blocking rod 320 is fixed to the rotating shaft 340, and the other end is used to close or open the ash inlet. The rotating flange 350 is fixed to the rotating shaft 340, and the rotating flange 350 is... The 50 is provided with a first limiting part 351 and a second limiting part 352; the limiting mechanism includes a driving mechanism, a guide sleeve 380 and a pin 390. The driving mechanism and the guide sleeve 380 are disposed on the base 310. The pin 390 is inserted into the guide sleeve 380, and one end of the pin 390 is connected to the driving mechanism through a connecting block 391, and the other end is matched with the first limiting part 351 and the second limiting part 352; the detection unit is used to detect the position of the rotating flange 350; the control unit is electrically connected to the detection unit and the driving mechanism respectively.

[0068] When the device of this invention is working, the blocking rod 320 can be manually raised first. When the rotating flange 350 is at the upper locking point, the control unit causes the pin 390 to extend through the drive mechanism and engage with the first limiting part 351 of the rotating flange 350, opening the ash inlet. The cement truck is then connected to the ash inlet pipe 200 through the connecting pipe, and the powder is sent into the powder silo (in the feeding state). When it is not in the feeding state or the statistical feeding time is longer than the set time, the control unit causes the pin 390 to retract through the drive mechanism and not engage with the first limiting part 351 of the rotating flange 350. The blocking rod 320 automatically falls back under the action of gravity. When the blocking rod 320 falls back to the lower locking point, the control unit causes the pin 390 to extend through the drive mechanism and engage with the second limiting part 352 of the rotating flange 350, closing the ash inlet. During the automatic retraction of the blocking rod 320 under gravity (i.e., when the rotating flange 350 is between the upper and lower locking points), the drive mechanism does not operate (the pin 390 is in a retracted state). Even if the connecting pipe is connected to the ash inlet pipe 200, the automatic retraction of the blocking rod 320 will not affect the material feeding, nor will it damage the connecting pipe, nor will it cause the drive mechanism to burn out due to stalling. The blocking rod 320 will not bend or deform. When the connecting pipe is disengaged from the ash inlet pipe 200, and the blocking rod 320 retracts to the lower locking point, the drive mechanism then controls the pin 390 to extend and engage with the second limiting part 352 of the rotating flange 350, closing the ash inlet and locking the blocking rod 320.

[0069] In one specific embodiment of the present invention, the detection unit is an angle sensor 370. The angle sensor 370 detects the rotation angle of the rotating flange 350 and determines the position of the rotating flange 350 based on the rotation angle. When the rotating flange 350 is at the upper locking point (e.g., Figure 10 , 11 When the control unit controls the pin 390 to approach the rotating flange 350 via the drive mechanism, it engages with the first limiting part 351 to restrict the rotation of the rotating flange 350, thereby restricting the rotation of the rotating shaft 340, causing the blocking rod 320 to lift and open the ash inlet; when the rotating flange 350 is at the lower locking point (as shown), the control unit controls the pin 390 to approach the rotating flange 350 via the drive mechanism, thereby engaging ... Figure 12 When the control unit controls the pin 390 to approach the rotating flange 350 via the drive mechanism, it engages with the second limiting part 352 to restrict the rotation of the rotating flange 350, thereby restricting the rotation of the rotating shaft 340, causing the blocking rod 320 to fall and close the ash inlet; when the rotating flange 350 is between the upper locking point and the lower locking point, the control unit controls the pin 390 to retract via the drive mechanism, thereby disengaging from both the first limiting part 351 and the second limiting part 352, causing the blocking rod 320 to automatically fall back under the action of gravity.

[0070] In another specific embodiment of the present invention, the detection unit includes a first sensing element, a second sensing element, and a proximity sensor electrically connected to the control unit; the proximity sensor is disposed on the base 310, and the first sensing element and the second sensing element are respectively disposed on the rotating flange 350; when the first sensing element activates the proximity sensor, it indicates that the rotating flange 350 is at the upper locking point, and when the second sensing element activates the proximity sensor, it indicates that the rotating flange 350 is at the lower locking point, thereby determining the position of the rotating flange 350 based on the activation signal of the proximity sensor, and then controlling the operation of the drive mechanism.

[0071] In one specific embodiment of the present invention, the driving mechanism is an electromagnet driving mechanism 330 or a linear motor driving mechanism, preferably an electromagnet driving mechanism 330. The control unit controls the operation of the electromagnet driving mechanism 330 through current. When the control unit outputs current to the electromagnet driving mechanism 330, the electromagnet driving mechanism 330 drives the pin 390 to move along the guide sleeve 380 through the connecting block 391; when the control unit does not output current to the electromagnet driving mechanism 330, the electromagnet driving mechanism 330 does not move. The electromagnet driving mechanism 330 generates electromagnetic force by controlling the current, thereby causing its pin 390 to extend or retract. When the pin 390 extends, it engages with the first limiting part 351 or the second limiting part 352 of the rotating flange 350; when the pin 390 retracts, it does not engage with the first limiting part 351 or the second limiting part 352 of the rotating flange 350, and the blocking rod 320 falls freely back. The electromagnet driving mechanism 330 has the advantages of low cost, low failure rate, and low maintenance cost.

[0072] In one specific embodiment of the present invention, a fourth limiting part 353 is provided on the rotating flange 350, and a limiting block 311 is provided on the base 310. The limiting block 311 is located within the fourth limiting part 353, and when the rotating flange 350 is at the upper locking point, the limiting block 311 is located at the lower limit position of the fourth limiting part 353 (e.g., Figure 10 , 11 As shown), when the rotary flange 350 is at the lower locking point, the limit block 311 is located at the upper limit position of the fourth limit part 353 (as shown). Figure 12 (As shown). The movement range of the blocking rod 320 is limited by the fourth limiting part 353 and the limiting block 311 (e.g., 0 to 90°), ensuring that the movement of the blocking rod 320 does not exceed the upper locking point and the lower locking point, and ensuring that the automatic falling movement of the blocking rod 320 can be realized normally.

[0073] Example 3

[0074] This invention also provides a control method for the feed blocking device as described in Embodiment 1 or Embodiment 2, the method including an ash inlet opening step and a closing step, the ash inlet opening step including:

[0075] Step 1.1: Control the drive mechanism to move according to the received opening control command, so that the first limit member (i.e., iron core or pin) retracts and the first limit member disengages from / does not cooperate with the second limit part;

[0076] Step 1.2: Manually raise the blocking component and acquire the position information of the rotating flange collected by the detection unit;

[0077] Step 1.3: When the rotating flange is at the upper locking point, the drive mechanism causes the first limiting member to cooperate with the first limiting part to restrict the rotating flange, causing the blocking member to lift and open the ash inlet.

[0078] Step 1.4: When not in feeding state or feeding time exceeds the set time, execute the ash inlet closing step.

[0079] The ash inlet closing step includes:

[0080] Step 1.5: Control the drive mechanism to move according to the received closing control command, so that the first limit member retracts and the first limit member disengages from / does not cooperate with the first limit part;

[0081] Step 1.6: The blocking component automatically falls back under the action of gravity and acquires the position information of the rotating flange collected by the detection unit;

[0082] Step 1.7: When the rotating flange is at the lower locking point, the drive mechanism causes the first limiting member to engage with the second limiting part to restrict the rotating flange, causing the blocking member to fall.

[0083] The above description only discloses specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or modifications that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A feed blocking device, fixed to the ash inlet pipe of a powder silo, characterized in that: The feed blocking device includes: Base; A pivot is rotatably mounted on the base; A blocking component, one end of which is fixed to the rotating shaft, and the other end of which is used to close or open the ash inlet; A rotating flange is fixed on the rotating shaft, and the rotating flange is provided with at least a first limiting part and a second limiting part; A limiting mechanism includes a driving mechanism and a first limiting member. The driving mechanism is disposed on the base and connected to the first limiting member. The first limiting member is disposed on the base and matches a first limiting part and a second limiting part. A detection unit is used to detect the position of the rotating flange; The control unit is electrically connected to the detection unit and the drive mechanism, respectively. When the rotating flange is at the upper locking point, the control unit controls the first limiting member to cooperate with the first limiting part through the drive mechanism to restrict the rotating flange, causing the blocking member to lift and open the ash inlet; when the rotating flange is at the lower locking point, the control unit controls the first limiting member to cooperate with the second limiting part through the drive mechanism to restrict the rotating flange, causing the blocking member to fall and close the ash inlet; when the rotating flange is between the upper and lower locking points, the control unit controls the first limiting member to not cooperate with either the first or second limiting part through the drive mechanism, causing the blocking member to automatically fall back under the action of gravity.

2. The feed blocking device according to claim 1, characterized in that: The driving mechanism is an electromagnet driving mechanism or a motor driving mechanism.

3. The feed blocking device according to claim 1, characterized in that: The first limiting member is a rotating block, one end of which is rotatably mounted on the base, and the other end is movably connected to the driving mechanism. A third limiting part is provided on the rotating block to match the first limiting part and the second limiting part.

4. The feed blocking device according to claim 1, characterized in that: The first limiting component includes a guide sleeve and a pin; the guide sleeve is fixed on the base, the pin is inserted into the guide sleeve, and one end of the pin is connected to the drive mechanism, and the other end is matched with the first limiting part and the second limiting part.

5. The feed blocking device according to claim 1, characterized in that: The detection unit is an angle sensor, which is installed on the rotating flange and used to detect the rotation angle of the rotating flange, so as to determine the position of the rotating flange based on the rotation angle.

6. The feed blocking device according to claim 1, characterized in that: The detection unit includes a first sensor, a second sensor, and a proximity sensor electrically connected to the control unit; the proximity sensor is disposed on the base, and the first sensor and the second sensor are respectively disposed on the rotating flange; when the first sensor activates the proximity sensor, the rotating flange is at the upper locking point, and when the second sensor activates the proximity sensor, the rotating flange is at the lower locking point.

7. The feed blocking device according to claim 1, characterized in that: A fourth limiting part is provided on the rotating flange, and a second limiting member is provided on the base. The second limiting member is located inside the fourth limiting part. When the rotating flange is at the upper locking point, the second limiting member is located at the lower limit position of the fourth limiting part, and when the rotating flange is at the lower locking point, the second limiting member is located at the upper limit position of the fourth limiting part.

8. The feed blocking device according to claim 1, characterized in that: A one-way damper is provided between the base and the pivot to limit the falling speed of the blocking component.

9. The feed blocking device according to claim 1, characterized in that: A feed sensor electrically connected to the control unit is provided at the ash inlet to determine whether the material is being fed based on the data collected by the feed sensor.

10. The feed blocking device according to claim 1, characterized in that: A protective cover is provided on the base, and the protective cover and the base form a sealed cavity. The rotating flange, the limiting mechanism and the detection unit are located in the sealed cavity.

11. The feed blocking device according to claim 10, characterized in that: An indicator light electrically connected to the control unit is provided on the protective cover.

12. A control method for the feed blocking device as described in any one of claims 1 to 11, characterized in that, The process includes an opening step and a closing step for the ash inlet, wherein the opening step for the ash inlet includes: The drive mechanism is controlled to move according to the received opening control command, so that the first limit member retracts and the first limit member disengages from / does not cooperate with the second limit part; Manually raise the blocking component and acquire the position information of the rotating flange collected by the detection unit; When the rotating flange is at the upper locking point, the drive mechanism causes the first limiting member to cooperate with the first limiting part to restrict the rotating flange, causing the blocking member to be lifted and the ash inlet to be opened. When the material feeding state is not in operation or the feeding time exceeds the set time, the ash inlet closing step is executed, which includes: The drive mechanism is controlled to move according to the received closing control command, so that the first limit member retracts and the first limit member disengages from / does not cooperate with the first limit part; The blocking component automatically falls back under the action of gravity and acquires the position information of the rotating flange collected by the detection unit; When the rotating flange is at the lower locking point, the drive mechanism causes the first limiting member to engage with the second limiting part to restrict the rotating flange, causing the blocking member to fall.

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