A coal detection device for preventing coal blockage in coal conveying system

Abstract

The embodiment of the present invention discloses a coal transportation system anti-blocking coal detection device, which belongs to the field of coal powder transportation detection technology, including a fixed base, a movable door and a pin shaft, wherein the movable door is rotatably mounted on one side of the outside of the fixed base, and the pin shaft is installed through the connection position between the inner top of the movable door and the outer side of the fixed base, and the inner bottom surface of the movable door and one side of the outer wall of the fixed base are fixedly connected by a driving mechanism, and the driving mechanism includes a rotating worm, a movable support arm, a rotating hinge arm, a driving motor, a fixed gear ring and a transmission crawler, and the rotating worm is symmetrically rotatably mounted on both sides of the outer wall of the fixed base, and the rotating hinge arm is hingedly mounted at the connection position between the outer top of the movable support arm and the bottom surface of the movable door, which solves the problem of the device not sending an alarm signal after coal is blocked. It has the effect of preventing further coal blockage and coal overflow to achieve a scientific detection effect.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of coal powder transportation detection equipment, and specifically to a coal blocking prevention detection device for a coal transportation system. Background Art

[0002] For power plants, the problem of coal blockage in the coal transportation system has always troubled domestic and even foreign power generation companies. In recent years, with the rapid development of social economy, the demand for power resources has been increasing, and the supply of coal for thermal power plants has been increasing. Therefore, under the current situation, strengthening the research on the problem of coal blockage in the coal transportation system of power plants has very important practical significance.

[0003] The coal pipe blockage detector of the original first and second phase coal conveying system of our factory is a rotary resistance type, which is installed inside the coal pipe of the belt conveyor. When the system is loaded with coal, the mechanism starts to work, and the equipment actuator rotates. Once the coal blocking coal level reaches a certain position, it will prevent the equipment blades from rotating. The coal blocking detector sends a signal, and the lower belt stops running, achieving the effect of coal blockage detection and preventing large amounts of coal blockage and coal overflow. In actual applications, due to the humid environment, high dust, and vibration inside the coal pipe, each component is affected by the above factors, and the equipment components are relatively complex, and the equipment mechanical wear is serious, resulting in the actuator refusing to act, so that no alarm signal is sent after coal blockage. The maintenance cost is reflected in the maintenance process, and the workload of maintenance personnel is increased. It shows that the rotary resistance coal blocking device cannot better meet the needs of the production site. Summary of the invention

[0004] To this end, an embodiment of the present invention provides a coal transportation system anti-blockage detection device to solve the problem in the prior art that the internal environment of the coal drop pipe is humid, dusty, vibration and other factors affect each component, and the equipment components are relatively complex and the equipment mechanical wear is serious, resulting in the actuator refusing to move, and thus resulting in no alarm signal after coal blockage.

[0005] In order to achieve the above purpose, the embodiment of the present invention provides the following technical solutions:

[0006] According to a first aspect of an embodiment of the present invention (corresponding to the first independent right), a coal blocking detection device for a coal conveying system comprises a fixed base, a movable door and a pin shaft, wherein the movable door is rotatably mounted on one side of the outer side of the fixed base, the pin shaft is penetrated and installed at a connection position between the inner top of the movable door and the outer side of the fixed base, the inner bottom surface of the movable door and one side of the outer wall of the fixed base are fixedly connected by a driving mechanism, and the driving mechanism comprises a rotating worm, a movable support arm, a rotating hinge arm, a driving motor, a fixed gear ring and a transmission crawler, the rotating worm is symmetrically rotatably mounted on both sides of the outer wall of the fixed base, the movable support arm is sleeved on the outside of the rotating worm, the rotating hinge arm is hingedly mounted at the connection position between the outer top of the movable support arm and the bottom surface of the movable door, the driving motor is penetrated and installed in the middle of the outer wall of the fixed base, the fixed gear ring is sleeved on the outer top of the rotating worm, and the transmission crawler is sleeved between the fixed gear ring and the outside of the output shaft of the driving motor.

[0007] Furthermore, the inner wall of the movable support arm is meshed with the outer wall of the rotating worm through a threaded groove, the bottom end of the rotating hinge arm is rotationally hinged with the top end of the movable support arm through a fixed axis, and the maximum opening angle of the rotating hinge arm for the movable door is sixty degrees.

[0008] According to the second aspect of the embodiment of the present invention, which corresponds to the third sole right, a limiting mechanism is movably embedded in one side of the outer side of the pin shaft, and the limiting mechanism is used to limit and fix the top of the movable door and the fixed base after rotation. The limiting mechanism includes a limiting pin, a fixing gasket, a supporting spring, a fixing clamp ring and a tooth plate. The limiting pin is movably embedded in one side of the outer side of the pin shaft, and the fixing gasket is sleeved and covered at the connection position between the outer wall surface of the pin shaft and the inner wall of the movable door. The fixing clamp ring is fixedly installed at the outer bottom end of the limiting pin, and the supporting spring is sleeved and installed at the outer bottom end of the limiting pin and the outer wall surface of the pin shaft. The tooth plate is evenly arranged on the bottom end surface of the fixing clamp ring

[0009] Furthermore, slots are evenly opened on both sides of the outer wall of the pin shaft corresponding to the position of the fixed clamp ring, and the inner diameter of the slot is equal to the outer diameter of the tooth plate, and the fixed base, movable door and pin shaft are all made of stainless steel.

[0010] According to the third aspect of the embodiment of the present invention, which corresponds to the fifth claim, a magnetic switch is embedded and installed on one side of the outer wall surface of the fixed base, and a distance adjusting mechanism is installed inside the movable door at a position corresponding to the external top end of the magnetic switch, and the distance adjusting mechanism is used to adjust the distance sensed by the magnetic switch, and the distance adjusting mechanism includes a telescopic rod, a magnetic plate, a bearing clamp and a leveling side arm, the telescopic rod is embedded through one side of the outer side of the movable door, the magnetic plate is fixedly clamped and installed on the outer bottom end of the telescopic rod, the bearing clamp is sleeved and installed on the bottom end of the telescopic rod and the middle of the top surface of the magnetic plate, and the leveling side arms are embedded and installed on both sides of the outer side of the telescopic rod.

[0011] Furthermore, the outer wall surface of the telescopic rod is fixedly connected to the inner wall of the movable door by means of threads, and the working voltage of the magnetic switch is AC 110V-250V, the maximum current is 2.5A, the maximum power is 200W, the working temperature is -40°C to 70°C, and the switch life is 1 million times.

[0012] Furthermore, the fixed base and the movable door are both covered with EVA sealing pads, and the fixed base is evenly penetrated with fixing screw holes, and a pressure sensor is embedded and installed on one side of the outer wall surface of the movable door.

[0013] Furthermore, the dimensions of the movable door are 237 mm long×237 mm high×28 mm, the dimensions of the fixed base are 300 mm long×300 mm wide×40 mm high, and the dimensions of the pin shaft are Φ=6 mm, 258 mm long.

[0014] The embodiments of the present invention have the following advantages:

[0015] A driving mechanism is provided. When the drop pipe is blocked by coal and the coal level reaches the height of the movable door outside the fixed base, the pressure sensor at the movable door is subjected to the pressure of the accumulated coal, and the driving motor is controlled to start. The driving motor drives the transmission crawler to rotate, and the transmission connection between the transmission crawler and the fixed gear ring is coordinated, so that the movable support arm can move outside the rotating worm, and the movable support arm supports the rotation of the rotating hinge arm, so that the movable door can be propped up outside the fixed base, and the movable door is turned from a closed state to an open state. The movable door moves, and the sensing distance between the movable door, the fixed base and the magnetic switch changes. The device instantly sends a signal, and the signal node is connected to the start-stop circuit of the belt conveyor. All lower-level equipment stops running immediately, and the upper-level equipment keeps the original working state unchanged. After the accumulated coal is cleaned, the movable door is reset, and the operator performs a reset operation in the coal conveying program control configuration InTouch-WindowViewer operating system, and the equipment can resume normal operation, thereby preventing further coal blockage and coal overflow, and achieving a scientific detection effect. The reliable coal blockage detection device not only greatly reduces the labor intensity of the on-duty personnel, but also improves the reliability of the coal conveying system operation.

[0016] A limiting mechanism is provided. When the movable door is rotated and adjusted outside the fixed base, the limiting pin is inserted downward on both sides of the pin shaft through the supporting spring, and the tooth plate at the bottom end of the fixed clamp ring is engaged with the groove on the outer wall of the pin shaft in turn, so that the pin shaft is statically fixed to the movable door and the fixed base, and can also make relative movement with the movable door and the fixed base. The operation is reliable and the disassembly is convenient. At the same time, the device has a simple structure, low cost, and strong material interchangeability. It can be applied to various thermal power plants, coal mines and other industries, and has strong promotion potential.

[0017] A distance adjusting mechanism is provided, and the magnetic plate and the telescopic rod are connected and fixed via a bearing clamp ring, and the magnetic plate can be moved downward by rotating the telescopic rod, so that the distance between the magnetic plate at the bottom end of the movable door and the magnetic switch is changed, and the magnetic plate and the magnetic switch are placed horizontally in coordination with the leveling side arm indication, thereby realizing the adjustment and fixation of the distance between the magnetic plate and the magnetic switch, and satisfying the rapid adjustment and change of the sensing distance of the magnetic switch in different environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0019] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0020] Figure 1 It is a schematic diagram of the overall structure of the device in an embodiment of the present invention;

[0021] Figure 2 For the present invention Figure 1 A schematic diagram of the three-dimensional structure of the middle movable door installation;

[0022] Figure 3 For the present invention Figure 2 Schematic diagram of the three-dimensional structure of the central rotating worm installation;

[0023] Figure 4 For the present invention Figure 3 Schematic diagram of the three-dimensional structure of the middle transmission crawler installation;

[0024] Figure 5 For the present invention Figure 1 Schematic diagram of the three-dimensional structure of the center pin installation;

[0025] Figure 6 For the present invention Figure 5 A schematic diagram of the enlarged structure at A in the middle;

[0026] Figure 7 For the present invention Figure 6 Structural diagram of the installation of the middle fixed clamp ring;

[0027] Figure 8 For the present invention Figure 1 Schematic diagram of the three-dimensional structure of the magnetic plate installation;

[0028] In the figure: 1. fixed base; 2. movable door; 3. pin shaft; 4. driving mechanism; 401. rotating worm; 402. movable support arm; 403. rotating hinge arm; 404. driving motor; 405. fixed gear ring; 406. driving track; 5. limiting mechanism; 501. limiting pin; 502. fixed gasket; 503. supporting spring; 504. fixed clamp ring; 505. tooth plate; 6. magnetic switch; 7. distance adjustment mechanism; 701. telescopic rod; 702. magnetic plate; 703. bearing clamp ring; 704. leveling side arm; 8. pressure sensor; 9. fixing screw hole; 10. EVA sealing pad. DETAILED DESCRIPTION

[0029] The following is a description of the implementation of the present invention by specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Refer to the instruction manual Figure 1-8, a coal transportation system anti-blocking coal detection device comprises a fixed base 1, a movable door 2 and a pin shaft 3, the movable door 2 is rotatably mounted on one side of the outer side of the fixed base 1, the pin shaft 3 is penetrated and installed at the connection position between the inner top of the movable door 2 and the outer side of the fixed base 1, the inner bottom surface of the movable door 2 and one side of the outer wall of the fixed base 1 are fixedly connected through a driving mechanism 4, the driving mechanism 4 comprises a rotating worm 401, a movable support arm 402, a rotating hinge arm 403, a driving motor 404, a fixed gear ring 405 and a transmission crawler 406, the rotating worm 401 is symmetrically rotatably mounted on both sides of the outer wall of the fixed base 1, the movable support arm 402 is sleeved and installed on the outside of the rotating worm 401, the rotating hinge arm 403 is hingedly mounted at the connection position between the outer top of the movable support arm 402 and the bottom surface of the movable door 2, the driving motor 404 is penetrated and installed in the middle of the outer wall of the fixed base 1, and the fixed gear ring 405 is sleeved and installed on the rotating worm 401. At the top of the outside, the transmission crawler 406 is sleeved and installed on the outside of the fixed gear ring 405 and the output shaft of the driving motor 404. When the drop pipe is blocked by coal and the coal level reaches the height of the movable door 2 outside the fixed base 1, the pressure sensor 8 at the movable door 2 is subjected to the pressure of the accumulated coal, and the driving motor 404 is controlled to start. The driving motor 404 drives the transmission crawler 406 to rotate, and the transmission connection between the transmission crawler 406 and the fixed gear ring 405 is coordinated, so that the movable support arm 402 can move outside the rotating worm 401, and the movable support arm 402 supports the rotation of the rotating hinge arm 403, so that the movable door 2 can be propped up outside the fixed base 1, and the movable door 2 is turned from a closed state to an open state. The movable door 2 moves, and the sensing distance between the movable door 2, the fixed base 1 and the magnetic switch 6 changes. The device instantly sends a signal, and the signal node is connected to the start-stop circuit of the belt conveyor, and all the lower-level equipment stops running immediately. The upper equipment keeps its original working state unchanged. After the accumulated coal is cleaned, the movable door 2 is reset. The operator performs the reset operation in the coal conveying programmable control configuration InTouch-WindowViewer operating system, and the equipment can resume normal operation, thereby preventing further coal blockage and coal overflow, and achieving scientific detection effects. The reliable coal blockage detection device not only greatly reduces the labor intensity of the on-duty personnel, but also improves the reliability of the coal conveying system operation, and plays a very important role in improving the safe and economical operation of thermal power plants. At the same time, the device has a simple structure, low cost, and strong material interchangeability. It can be applied to various thermal power plants, coal mines and other industries, and has strong promotion.

[0031] In order to ensure the stability and reliability of the movable support arm 402 in the operation outside the rotating worm gear 401, the inner wall of the movable support arm 402 and the outer wall of the rotating worm gear 401 are meshed and connected by a threaded groove. In order to ensure the firmness of the connection between the rotating hinge arm 403 and the movable support arm 402, the bottom end of the rotating hinge arm 403 and the top end of the movable support arm 402 are rotatably hinged by a fixed axis, and the maximum opening angle of the rotating hinge arm 403 for the movable door 2 is sixty degrees.

[0032] A limiting mechanism 5 is movably embedded and installed on one side of the outer side of the pin shaft 3. The limiting mechanism 5 is used to limit and fix the top of the movable door 2 and the fixed base 1 after rotation. The limiting mechanism 5 includes a limiting bayonet 501, a fixing gasket 502, a supporting spring 503, a fixing clamp ring 504 and a tooth plate 505. The limiting bayonet 501 is movably embedded and installed on one side of the outer side of the pin shaft 3. The fixing gasket 502 is sleeved and covered on the connecting position between the outer wall surface of the pin shaft 3 and the inner wall of the movable door 2. The fixing clamp ring 504 is fixedly installed on the outer bottom end of the limiting bayonet 501. The supporting spring 503 It is sleeved and installed on the outer bottom end of the limit pin 501 and the outer wall surface of the pin shaft 3, and the tooth plate 505 is evenly arranged on the bottom end surface of the fixed clamp ring 504. When the movable door 2 is rotated and adjusted outside the fixed base 1, the limit pin 501 is inserted downward on both sides of the pin shaft 3 through the support spring 503, and the tooth plate 505 at the bottom end of the fixed clamp ring 504 is engaged with the groove on the outer wall of the pin shaft 3 in turn, so that the pin shaft 3 can be statically fixed to the movable door 2 and the fixed base 1, and can also make relative movement with the movable door 2 and the fixed base 1, which is reliable in operation and easy to disassemble.

[0033] In order to ensure the tightness of the engagement between the slot at the fixed clamp ring 504 and the tooth plate 505, slots are evenly opened on both sides of the outer wall of the pin shaft 3 corresponding to the position of the fixed clamp ring 504, and the inner diameter of the slot is equal to the outer diameter of the tooth plate 505. In order to ensure the strength, toughness and corrosion resistance of the fixed base 1, the movable door 2 and the pin shaft 3 and extend the actual service life of the fixed base 1, the movable door 2 and the pin shaft 3, the fixed base 1, the movable door 2 and the pin shaft 3 are all made of stainless steel.

[0034] A magnetic switch 6 is embedded and installed on one side of the outer wall surface of the fixed base 1, and a distance adjustment mechanism 7 is installed at the top position of the outer surface of the magnetic switch 6 inside the movable door 2. The distance adjustment mechanism 7 is used to adjust the distance sensed by the magnetic switch 6. The distance adjustment mechanism 7 includes a telescopic rod 701, a magnetic plate 702, a bearing clamping ring 703 and a leveling side arm 704. The telescopic rod 701 is embedded through one side of the outer surface of the movable door 2, the magnetic plate 702 is fixedly clamped and installed at the bottom end of the outer surface of the telescopic rod 701, the bearing clamping ring 703 is sleeved and installed at the bottom end of the telescopic rod 701 and the middle of the top surface of the magnetic plate 702, and the leveling side arm 704 is embedded and installed on both sides of the outside of the telescopic rod 701, and the magnetic plate 702 and the telescopic rod 701 are connected and fixed through the bearing clamp 703. The telescopic rod 701 can be rotated to move the magnetic plate 702 downward, so that the distance between the magnetic plate 702 and the magnetic switch 6 at the bottom of the movable door 2 is changed, and the magnetic plate 702 and the magnetic switch 6 are placed horizontally in coordination with the indication of the leveling side arm 704, thereby realizing the adjustment and fixation of the distance between the magnetic plate 702 and the magnetic switch 6, and meeting the rapid adjustment and change of the sensing distance of the magnetic switch 6 in different environments.

[0035] In order to ensure the firmness of the installation of the telescopic rod 701 after adjustment, and at the same time ensure the stability and durability of the use of the magnetic switch 6, the outer wall surface of the telescopic rod 701 and the inner wall of the movable door 2 are fixedly connected by threads, and the working voltage of the magnetic switch 6 is AC110V-250V, the maximum current is 2.5A, the maximum power is 200W, the working temperature is -40℃ to 70℃, and the switch life is 1 million times.

[0036] In order to increase the tightness of the contact between the fixed base 1 and the outer wall of the movable door 2 and the coal drop pipe to avoid leakage of coal powder when the device is working, the fixed base 1 and the movable door 2 are both covered with EVA sealing pads 10 on the outside. In order to install and fix the fixed base 1 on the outside of the coal drop pipe, fixing screw holes 9 are evenly opened inside the fixed base 1. In order to sense the accumulated coal outside the movable door 2, a pressure sensor 8 is embedded and installed on one side of the outer wall surface of the movable door 2.

[0037] In order to ensure the applicability of the device components to the coal drop pipe, the dimensions of the movable door 2 are 237mm long × 237mm × 28mm high, the dimensions of the fixed base 1 are 300mm long × 300mm wide × 40mm high, and the dimensions of the pin shaft 3 are Φ=6mm, 258mm long.

[0038] The use process of the embodiment of the present invention is as follows: First, when the drop pipe is blocked by coal, when the coal level reaches the height of the movable door 2 outside the fixed base 1, the pressure sensor 8 at the movable door 2 is subjected to the pressure of the accumulated coal, and the drive motor 404 is controlled to start, and the drive motor 404 drives the transmission crawler 406 to rotate, and the transmission connection between the transmission crawler 406 and the fixed gear ring 405 is coordinated, so that the movable support arm 402 can move outside the rotating worm 401, and the movable support arm 402 supports the rotation of the rotating hinge arm 403, so that the movable door 2 can be propped up outside the fixed base 1, and the movable door 2 is turned from a closed state to an open state, and the movable door 2 moves, and the sensing distance between the movable door 2, the fixed base 1 and the magnetic switch 6 changes. The device instantly sends a signal, and the signal node is connected to the start-stop circuit of the belt conveyor. All lower-level equipment stops running immediately, and the upper-level equipment keeps the original working state unchanged. After the accumulated coal is cleaned, the movable door 2 is reset, and the operator performs a reset operation in the coal conveying program control configuration InTouch-WindowViewer operating system, and the equipment can resume normal operation.

[0039] Next, when the movable door 2 is rotated and adjusted outside the fixed base 1, the limit pin 501 is inserted downward on both sides of the pin shaft 3 through the support spring 503, and the tooth plate 505 at the bottom end of the fixed clamp ring 504 is engaged with the groove on the outer wall of the pin shaft 3 in turn, so that the pin shaft 3 can be statically fixed to the movable door 2 and the fixed base 1, and can also make relative movement with the movable door 2 and the fixed base 1, which is reliable in operation and easy to disassemble.

[0040] Finally, the magnetic plate 702 and the telescopic rod 701 are connected and fixed via the bearing clamp 703, and the telescopic rod 701 is rotated to move the magnetic plate 702 downward, so that the distance between the magnetic plate 702 and the magnetic switch 6 at the bottom of the movable door 2 is changed, and the magnetic plate 702 and the magnetic switch 6 are placed horizontally in coordination with the indication of the leveling side arm 704, thereby realizing the adjustment and fixation of the distance between the magnetic plate 702 and the magnetic switch 6, and satisfying the rapid adjustment and change of the sensing distance of the magnetic switch 6 in different environments.

[0041] Although the present invention has been described in detail above by general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

[0042] The terms such as "upper", "lower", "left", "right", "middle", etc. cited in this specification are only for the convenience of description and are not intended to limit the scope of implementation of the present invention. Changes or adjustments to their relative relationships should be regarded as within the scope of implementation of the present invention without substantially changing the technical content.

Claims

1. A coal transportation system anti-blocking coal detection device, comprising a fixed base (1), a movable door (2) and a pin (3), wherein the movable door (2) is rotatably mounted on the outer side of the fixed base (1), and the pin (3) is installed through the inner top of the movable door (2) and the outer side of the fixed base (1), characterized in that: The inner bottom surface of the movable door (2) is fixedly connected to one side of the outer wall of the fixed base (1) via a driving mechanism (4), wherein the driving mechanism (4) comprises a rotating worm (401), a movable support arm (402), a rotating hinge arm (403), a driving motor (404), a fixed gear ring (405) and a transmission crawler (406), wherein the rotating worm (401) is symmetrically rotatably mounted on both sides of the outer wall of the fixed base (1), and the movable support arm (402) is sleeved and mounted on the rotating worm (401). The rotating hinge arm (403) is hingedly mounted on the outside of the rotating worm (401) at the connection position between the external top of the movable support arm (402) and the bottom surface of the movable door (2), the driving motor (404) is installed through the middle of the outer wall of the fixed base (1), the fixed gear ring (405) is sleeved on the external top of the rotating worm (401), and the driving crawler (406) is sleeved on the fixed gear ring (405) and the outside of the output shaft of the driving motor (404); A magnetic switch (6) is embedded and installed on one side of the outer wall surface of the fixed base (1); a distance adjustment mechanism (7) is installed inside the movable door (2) at a position corresponding to the outer top end of the magnetic switch (6); the distance adjustment mechanism (7) is used to adjust the distance sensed by the magnetic switch (6); the distance adjustment mechanism (7) comprises a telescopic rod (701), a magnetic plate (702), a bearing clamping ring (703) and a leveling side arm (704); the telescopic rod (701) is embedded through one side of the outer side of the movable door (2); the magnetic plate (702) is fixedly clamped and installed on the outer bottom end of the telescopic rod (701); the bearing clamping ring (703) is sleeved and installed on the bottom end of the telescopic rod (701) and the middle part of the top end surface of the magnetic plate (702); and the leveling side arm (704) is embedded and installed on both sides of the outer side of the telescopic rod (701); The fixed base (1) and the movable door (2) are both covered with EVA sealing pads (10) on their exteriors, and the fixed base (1) is evenly penetrated with fixing screw holes (9), and a pressure sensor (8) is embedded and installed on one side of the outer wall surface of the movable door (2).

2. A coal transportation system anti-blocking coal detection device according to claim 1, characterized in that: The inner wall of the movable support arm (402) is meshed with the outer wall of the rotating worm (401) via a threaded groove, the bottom end of the rotating hinge arm (403) is rotationally hinged with the top end of the movable support arm (402) via a fixed axis, and the maximum opening angle of the rotating hinge arm (403) for the movable door (2) is sixty degrees.

3. A coal transportation system anti-blocking coal detection device according to claim 1, characterized in that: The outer wall surface of the telescopic rod (701) is fixedly connected to the inner wall of the movable door (2) via threads, and the magnetic switch (6) has an operating voltage of AC110V-250V, a maximum current of 2.5A, a maximum power of 200W, an operating temperature of -40°C to 70°C, and a switch life of 1 million times.

4. A coal transportation system anti-blocking coal detection device as claimed in claim 1, characterized in that: The dimensions of the movable door (2) are 237 mm long × 237 mm wide × 28 mm high, the dimensions of the fixed base (1) are 300 mm long × 300 mm wide × 40 mm high, and the dimensions of the pin shaft (3) are Φ=6 mm and 258 mm long.

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