A device for measuring moisture content of coal

Abstract

The present invention relates to the field of coal moisture content detection, and specifically to a coal moisture content measuring device, comprising: an auxiliary unit, the auxiliary unit comprising a tube body, the two ends of the tube body are open and hollow, and the outer wall of the lower half of the tube body is arranged as a spiral structure; a detection unit, the detection unit comprising an insertion rod, the lower end of the insertion rod is provided with a moisture sensor, and the moisture sensor transmits detection data through a wire; the insertion rod can be inserted into the tube body, and the moisture sensor is extended to the outside of the end of the tube body; in the present invention, the coal moisture content measuring device is aimed at measuring the moisture content of the surface of coal inside a coal pile, by rotating the tube body, so that the tube body can quickly realize rotary drilling of holes on the coal pile, and the insertion rod can be smoothly inserted into the hole. Compared with the existing method for measuring the moisture content of the surface of coal in the coal pile, it is not necessary to dig a pit or bury the moisture sensor on the insertion rod, and the measured data is accurate.

Description

Technical Field

[0001] The invention relates to the technical field of coal moisture content detection, in particular to a coal moisture content measuring device. Background Art

[0002] The moisture content of coal is an important quality indicator, which reflects the proportion of moisture contained in coal during mining, transportation and storage. The moisture content of coal can be divided into intrinsic moisture and extrinsic moisture. The intrinsic moisture is the moisture naturally contained in the coal during its formation, while the extrinsic moisture is the moisture attached to the surface of the coal due to mining, transportation and other processes.

[0003] External moisture refers to the water sprinkled during the mining or transportation process, which is used to suppress coal dust and reduce the pollution of dust to the surrounding environment and on-site personnel and equipment. The amount of water sprinkled directly affects the dust suppression effect, and will also affect the subsequent use of coal. If the amount of water sprinkled is too low, the dust suppression effect is poor; if the amount of water sprinkled is too high, it can effectively suppress dust, but the moisture content on the surface of coal increases, which will affect the subsequent use of coal, such as reducing its calorific value and combustion efficiency. Therefore, it is very important to control the amount of water sprinkled. The existing method of controlling the amount of water sprinkled generally uses some measuring equipment to measure the moisture content on the surface of coal, and then controls the amount of water sprinkled according to the measured data.

[0004] To measure the surface moisture content of coal, it is necessary not only to measure the surface moisture content of coal on the surface of the coal pile, but also to measure the surface moisture content of coal inside the coal pile. However, the current measuring equipment has limitations. The probe of the measuring equipment can successfully measure the surface moisture content of coal on the surface of the coal pile, but the surface moisture content data of coal inside the coal pile is difficult to measure. In order to measure the surface moisture content data of coal inside the coal pile, it is necessary to dig a pit on the surface of the coal pile, and then extend the probe of the measuring equipment into the pit. This method is inefficient. If there are multiple measuring points on the coal pile, it is difficult to complete the measuring operation within the specified time. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the problem of inconvenience and low efficiency in checking the surface moisture content of coal blocks in a coal pile in the prior art.

[0006] In order to solve the above technical problems, the present invention provides a device for measuring the moisture content of coal, comprising:

[0007] An auxiliary unit, the auxiliary unit comprising a tube body, both ends of the tube body are open and hollow, and the outer wall of the lower half of the tube body is arranged in a spiral structure;

[0008] A detection unit, the detection unit includes an insertion rod, a moisture sensor is provided at the lower end of the insertion rod, and the moisture sensor transmits detection data through a wire;

[0009] Furthermore, the insertion rod can be inserted into the tube body and extend the moisture sensor to the outside of the end of the tube body.

[0010] In one embodiment of the present invention, the outer ring of the tube body is provided with a cylinder, the two ends of the cylinder are open and hollow, the lower end of the cylinder is vertically located at the measuring point on the coal pile, and the upper end of the cylinder is provided with a driving assembly;

[0011] The driving assembly comprises a plurality of support blocks uniformly fixed to the upper port of the cylinder, the end of each support block extends in the axial direction of the cylinder, a ring body is provided at the axial position of the upper port of the cylinder, an annular groove is provided on the outer ring, and the end of each support block is slidably connected to the annular groove;

[0012] The inner ring of the ring body penetrates a tube body, and the outer ring of the upper half of the tube body is evenly provided with a plurality of guide strips, which are slidably connected one by one in a plurality of limit grooves evenly arranged on the side wall of the inner ring of the ring body.

[0013] In one embodiment of the present invention, a rotation groove is provided on the inner side wall of each of the limiting grooves, a roller body is rotatably connected in each rotation groove, and the guide strip is slidably connected in the limiting groove through the roller body.

[0014] In one embodiment of the present invention, the lower end of the cylinder is fixedly connected to a base plate, and the lower port of the cylinder passes through the base plate; strip openings are opened on both sides of the upper surface of the base plate, each strip opening is provided with a cross bar, and each cross bar is symmetrically slidably connected with a rectangular frame.

[0015] In one embodiment of the present invention, a pull rod is fixedly connected to the upper ends of two adjacent rectangular frames, and the lower end of each of the rectangular frames is arranged in a pointed shape.

[0016] In one embodiment of the present invention, a plurality of groups of protrusions adapted to the crossbar are provided on the inner side wall of each rectangular frame, and each group of protrusions is respectively arranged at a position close to the upper end and the lower end of the rectangular frame.

[0017] In one embodiment of the present invention, a blocking assembly is provided in the tube body, and the blocking assembly includes a vertical rod, the lower end of which is conical and threadedly connected to the inner wall of the lower end of the tube body, and the upper end of the vertical rod protrudes from the upper port of the tube body.

[0018] In one embodiment of the present invention, a plurality of moisture sensors are evenly arranged on the insertion rod, and the moisture sensors are arranged along the axis direction of the insertion rod.

[0019] In one embodiment of the present invention, a plurality of protection components are arranged on the insertion rod, each of which is arranged one by one at the lower side of the moisture sensor, and each of the protection components is used to protect the moisture sensor;

[0020] Each protection assembly includes a cylindrical protection shell, a cross-shaped top plate is provided at the lower end of the protection shell, and an upper end of the protection shell is sleeved at the lower edge of the moisture sensor;

[0021] A cross-shaped expansion groove is provided at the axial position of the insertion rod where it coincides with the protective shell. The expansion groove radially penetrates to the outer surface of the insertion rod. A top plate is slidably connected in the expansion groove. A compression spring is provided on the upper surface of the top plate. The compression spring presses against the top surface of the expansion groove, and the top plate can move in the expansion groove along the axial direction of the insertion rod. Multiple outer surfaces of the protective shells are connected in series by steel wires.

[0022] In one embodiment of the present invention, the portion of the steel wire not connected to the protective shell passes through the interior of the insertion rod and extends to the upper end of the insertion rod, and a pull ring is fixed to the end of the steel wire, which is sleeved on the outer ring of the wire at the upper end of the insertion rod.

[0023] The above technical solution of the present invention has the following advantages compared with the prior art:

[0024] 1. In the present invention, the coal moisture content measuring device is used to measure the moisture content of the coal surface inside the coal pile. By rotating the tube body, the tube body can quickly realize rotary drilling of holes on the coal pile, and the insertion rod can be smoothly inserted into the hole. Compared with the existing method for measuring the moisture content of the coal surface inside the coal pile, it does not require digging a pit or burying the moisture sensor on the insertion rod, and the measured data is accurate.

[0025] 2. In the present invention, a driving assembly is provided. When there are multiple measuring points on the surface of the coal pile, the pipe body cooperates with the setting of the driving assembly to effectively reduce the labor of on-site operators and improve the measuring efficiency, so as to complete the measuring operation within the specified time. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0027] Figure 1 This is a first-view stereoscopic diagram of the coal moisture content measuring device of the present invention;

[0028] Figure 2 A second perspective stereoscopic diagram of the coal moisture content measuring device of the present invention;

[0029] Figure 3 It is a third perspective stereogram of the coal moisture content measuring device of the present invention;

[0030] Figure 4 It is a three-dimensional diagram of the cooperation between the base plate and the cylinder in the present invention;

[0031] Figure 5 It is a three-dimensional diagram of the matching of the ring body and the gear ring in the present invention;

[0032] Figure 6 A top view of a device for measuring moisture content in coal according to the present invention;

[0033] Figure 7 It is a three-dimensional diagram of the matching of the pull rod and the rectangular frame in the present invention;

[0034] Figure 8 is a three-dimensional diagram of the tube body of the present invention;

[0035] Fig. 9 It is a three-dimensional diagram of the cooperation between the insertion rod and the moisture sensor in the present invention;

[0036] Fig.10 is a cross-sectional view of the protection component in the present invention;

[0037] Fig.11 A three-dimensional diagram of the insertion rod in the present invention;

[0038] Fig.12 is a three-dimensional diagram of the protection component in the present invention;

[0039] Fig.13 It is a three-dimensional diagram of the protective shell in the present invention.

[0040] In the figure: 1. tube body; 2. plug rod; 3. moisture sensor; 4. wire; 5. cylinder body; 6. support block; 7. ring body; 8. annular groove; 9. guide strip; 10. limit groove; 11. roller body; 12. base plate; 13. strip mouth; 14. cross bar; 15. rectangular frame; 16. pull rod; 17. protrusion; 18. vertical rod; 19. protective shell; 20. top plate; 21. telescopic groove; 22. compression spring; 23. steel wire; 24. pull ring; 25 motor; 26. gear; 27. gear ring. DETAILED DESCRIPTION

[0041] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0042] Reference Figure 1 - Fig. 9A coal moisture content determination device includes an auxiliary unit and a detection unit, wherein the auxiliary unit includes a tube body 1, the two ends of the tube body 1 are open and hollow, and the outer wall of the lower half of the tube body 1 is arranged as a spiral structure; the detection unit includes an insertion rod 2, the lower end of the insertion rod 2 is provided with a moisture sensor 3, and the moisture sensor 3 transmits detection data through a wire; and the insertion rod 2 can be inserted into the tube body 1, and the moisture sensor 3 is extended to the outside of the end of the tube body 1;

[0043] The coal moisture content measuring device designed in this embodiment has a specific operation process of placing the lower end of the tube body 1 against the measuring point position on the coal pile, and then rotating the tube body 1. Since the lower half outer circle of the tube body 1 is arranged in a spiral structure, when the tube body 1 rotates, the tube body 1 can be screwed into the coal pile. When the tube body 1 drills into the specified depth in the coal pile, the end of the plunger 2 with the moisture sensor 3, that is, the lower end of the plunger 2, is inserted into the interior of the coal pile from the upper end of the tube body 1, and then the plunger 2 moves down to the lower end position of the tube body 1, and then the tube body 1 is rotated in the opposite direction to take the tube body 1 out of the coal pile, and the plunger 2 stays in the coal pile, that is, the plunger 2 fills the hole drilled by the tube body 1. During the process of the tube body 1 being moved up and taken out, the coal in the hole is vibrated and attached to the moisture sensor 3 on the plunger 2, and then the measuring instrument is operated to output the data collected by the moisture sensor 3 through a wire, and the specific wire can be set on the outside of the plunger 2; after the data collection is completed, the plunger 2 is pulled up and separated from the coal pile;

[0044] The moisture sensor 3 used in this embodiment can use a microwave moisture sensor 3. The working principle of the microwave moisture sensor 3 is: using the propagation characteristics of microwaves in different media, the moisture content is determined by measuring the propagation speed and attenuation degree of microwaves in the material, and the moisture content of the coal surface can be accurately measured;

[0045] The device for measuring the moisture content of coal is used for measuring the moisture content of the surface of coal in a coal pile. By rotating the tube body 1, the tube body 1 can quickly realize rotary drilling of holes on the coal pile, and the rod 2 can be smoothly inserted into the holes. Compared with the existing method for measuring the moisture content of the surface of coal in a coal pile, there is no need to dig a pit or bury the moisture sensor 3 on the rod 2, and the measured data is accurate. If a pit is dug and the moisture sensor 3 is buried, there is a possibility that part of the coal on the surface will roll into the pit, affecting the accuracy of the measurement of the moisture content on the coal surface. In the present embodiment, the rod 2 is directly inserted into the rotary drilling hole, which can directly avoid the problem of mixing the surface coal with the coal in the rotary drilling hole.

[0046] Reference Figure 1 - Figure 6The outer ring of the tube body 1 is provided with a cylinder body 5, and the two ends of the cylinder body 5 are open and hollow. The lower end of the cylinder body 5 is vertically located at the measuring point position on the coal pile, and the upper end of the cylinder body 5 is provided with a driving assembly; the driving assembly includes a plurality of support blocks 6 evenly fixed to the upper end of the cylinder body 5, and the end of each support block 6 extends in the axial direction of the cylinder body 5. A ring body 7 is provided at the axial position of the upper end of the cylinder body 5, and an annular groove 8 is provided on the outer ring of the ring body 7, and the end of each support block 6 is slidably connected to the annular groove 8; the inner ring of the ring body 7 penetrates the tube body 1, and the outer ring of the upper half of the tube body 1 is evenly provided with a plurality of guide strips 9, and the plurality of guide strips 9 are slidably connected one by one to a plurality of limit grooves 10 evenly provided on the side wall of the inner ring of the ring body 7;

[0047] In this embodiment, the driving assembly further includes a motor 25 that can rotate forward and reverse. The end shell of the motor 25 is fixedly connected to one side of the upper end of the cylinder 5. The output end of the motor 25 is fixedly connected to a gear 26. The gear 26 is meshed with a gear ring 27. The gear ring 27 is fixedly connected to the upper end surface of the ring body 7, and the gear ring 27 is coaxially arranged with the ring body 7.

[0048] When the insertion rod 2 needs to be placed inside the coal pile, the driving motor 25 rotates forward, the motor 25 drives the gear 26 to rotate, the gear 26 drives the gear ring 27 to rotate, the gear ring 27 drives the ring body 7 to rotate, the limit groove 10 of the inner ring of the ring body 7 is constrained by the guide bar 9, then the ring body 7 will drive the tube body 1 to rotate forward through the guide bar 9, the tube body 1 rotates and screws into the coal pile, and then the insertion rod 2 is inserted into the tube body 1;

[0049] When the pipe body 1 needs to be taken out from the coal pile, the driving motor 25 is reversed, the motor 25 drives the gear 26 to rotate, the gear 26 drives the gear ring 27 to rotate, the gear ring 27 drives the ring body 7 to rotate, the limit groove 10 of the inner ring of the ring body 7 is constrained by the guide bar 9, then the ring body 7 drives the pipe body 1 to rotate in the opposite direction through the guide bar 9, the pipe body 1 rotates and rotates out from the coal pile, and then the moisture content of the coal surface is measured;

[0050] When there are multiple measuring points on the surface of the coal pile, the pipe body 1 cooperates with the setting of the driving assembly to effectively reduce the labor of on-site operators and improve the measuring efficiency, so as to complete the measuring operation within the specified time.

[0051] Reference Figure 1 - Figure 5 A rotation groove is provided on the inner side wall of each of the limiting grooves 10, a roller body 11 is rotatably connected in each rotation groove, and the guide bar 9 is slidably connected in the limiting groove 10 through the roller body 11;

[0052] A rotation groove is opened, and a roller body 11 is arranged in the rotation groove, so that the sliding friction between the guide bar 9 and the limit groove 10 is converted into rolling friction between the guide bar 9 and the roller body 11, thereby reducing the relative movement resistance between the guide bar 9 and the ring body 7, reducing the wear between the guide bar 9 and the limit groove 10, and also facilitating the smooth rotation of the pipe body 1 to extend into the coal pile.

[0053] Reference Figure 1 - Figure 7 The lower end of the cylinder 5 is fixedly connected to a base plate 12, and the lower end of the cylinder 5 passes through the base plate 12; strip openings 13 are provided on both sides of the upper surface of the base plate 12, and a cross bar 14 is provided in each strip opening 13, and a rectangular frame 15 is symmetrically slidably connected to each cross bar 14;

[0054] A base plate 12 is arranged at the lower end of the cylinder 5, and the cylinder 5 can be stably placed on the surface of the coal pile through the base plate 12. When operating the coal moisture content measuring device, no operator support is required. At the same time, a rectangular frame 15 is arranged on the base plate 12. When the base plate 12 is placed on the surface of the coal pile, the rectangular frame 15 is inserted into the coal pile to improve the overall stability of the coal moisture content measuring device. Even if the base plate 12 is placed on a slope on the surface of the coal pile, the coal moisture content measuring device can be stabilized. The cross bar 14 is arranged to constrain the rectangular frame 15 in the strip opening 13 to prevent the rectangular frame 15 from escaping from the strip opening 13.

[0055] Reference Figure 1 - Figure 7 , a pull rod 16 is fixedly connected to the upper ends of two adjacent rectangular frames 15, and the lower end of each rectangular frame 15 is set in a pointed shape; the lower end of the rectangular frame 15 is set in a pointed shape, which is convenient for pressing the lower end of the rectangular frame 15 into the inside of the coal pile, and quickly fixing the substrate 12 on the surface of the coal pile, thereby improving the measurement efficiency; a pull rod 16 is fixedly connected to the upper ends of two adjacent rectangular frames 15. When the coal moisture content measuring device is not in use, the pull rod 16 is pulled up to pull the rectangular frame 15 out of the coal pile. While pulling up the pull rod 16, the coal moisture content measuring device can also be grasped as a whole, taken away and placed in the next measuring point, which is easy to operate and helps to improve the coal measurement efficiency.

[0056] Reference Figure 7 A plurality of groups of protrusions 17 adapted to the cross bar 14 are provided on the inner side wall of each rectangular frame 15, and each group of protrusions 17 is respectively arranged near the upper end and the lower end of the rectangular frame 15; after the rectangular frame 15 is pressed down into the coal pile, the protrusions 17 at the upper end of the rectangular frame 15 are squeezed on the cross bar 14, and the cross bar 14 stabilizes the rectangular frame 15, so that the rectangular frame 15 can be stably embedded in the coal pile, and the coal moisture content measuring device is further stabilized.

[0057] Reference Figure 1 - Figure 2The pipe body 1 is provided with a plugging assembly, which includes a vertical rod 18, the lower end of which is conical, and the lower end of which is threadedly connected to the inner side wall of the lower end of the pipe body 1, and the upper end of which protrudes from the upper port of the pipe body 1;

[0058] During the process of the pipe body 1 rotating and extending into the coal pile, some granular coal will enter along the lower end of the pipe body 1 and block the lower end of the pipe body 1. When the plunger 2 is inserted into the pipe body 1 at a later stage, the granular coal inside the pipe body 1 will hinder the insertion of the plunger 2, that is, hinder the lower end of the plunger 2 from protruding from the lower end of the pipe body 1, so that the moisture sensor 3 on the plunger 2 cannot extend into the hole of the rotary excavated coal pile. To address this problem, a blocking component is provided in the pipe body 1, which is used to block the position of the lower end of the pipe body 1. Specifically, When in use, before the lower end of the tube body 1 is rotated and extended into the coal pile, the conical end of the vertical rod 18 is first inserted into the tube body 1, and the lower end of the vertical rod 18 is moved to the threaded position on the inner wall of the lower end of the tube body 1, and then the upper end of the vertical rod 18 is rotated. The vertical rod 18 is rotated, and the lower end of the vertical rod 18 is threadedly connected to the inner wall of the lower end of the tube body 1. Then the tube body 1 is rotated to extend into the coal pile. During the extension process, the lower end of the vertical rod 18 blocks the lower end of the tube body 1 to prevent granular coal from entering the tube body 1 and hindering the subsequent insertion of the insertion rod 2.

[0059] Reference Fig. 9 A plurality of moisture sensors 3 are evenly arranged on the plug rod 2, and the moisture sensors 3 are arranged along the axial direction of the plug rod 2; a plurality of moisture sensors 3 are arranged on the plug rod 2, which can be used to measure the surface moisture content of coal blocks at different depths in the rotary drilling hole, so that the coal surface moisture content measurement data is more representative and can provide reliable data for the subsequent watering amount.

[0060] Reference Fig. 9 - Fig.13 , a plurality of protection components are arranged on the insertion rod 2, each of which is arranged one by one at the lower side of the moisture sensor 3, and each of the protection components is used to protect the moisture sensor 3;

[0061] Each protection component includes a cylindrical protection shell 19, the lower end of the protection shell 19 is provided with a cross-shaped top plate 20, and the upper end of the protection shell 19 is sleeved on the lower edge of the moisture sensor 3; a cross-shaped expansion groove 21 is provided at the axial position of the portion of the insertion rod 2 that coincides with the protection shell 19, the expansion groove 21 radially penetrates to the outer surface of the insertion rod 2, the expansion groove 21 is slidably connected to the top plate 20, the upper surface of the top plate 20 is provided with a compression spring 22, the compression spring 22 is pressed against the top surface position of the expansion groove 21, and the top plate 20 can move in the expansion groove 21 along the axial direction of the insertion rod 2; the outer surfaces of multiple protection shells 19 are connected in series by steel wires 23;

[0062] After the rod 2 is placed in the hole drilled by the tube body 1 and the moisture sensor 3 completes the measurement of the moisture content of the coal surface, the rod 2 is pulled out from the coal pile together with the moisture sensor 3. During the pulling out process, the edges and corners on the coal surface will squeeze and damage the moisture sensor 3, resulting in the inability to continue to use the moisture sensor 3. For this reason, a protection component for protecting the moisture sensor 3 is provided. The protection component is used before the rod 2 is pulled out from the coal pile. During the specific operation, the steel wire 23 is pulled up, and the steel wire 23 simultaneously drives all the protective shells 19 to move along the axial direction of the rod 2, and the top plate 20 at the bottom of the protective shell 19 moves toward the moisture sensor 3. At the same time, the protective shell 19 is sleeved on the outer surface of the moisture sensor 3. At this time, the protective shell 19 wraps the moisture sensor 3, and then the rod 2 and the steel wire 23 are pulled up to pull the rod 2 together with the moisture sensor 3 out of the coal pile;

[0063] After the insertion rod 2 is pulled out, the top plate 20 is retracted and reset due to the elastic force of the compression spring 22 to which it is connected, and the moisture sensor 3 is exposed again and can be used subsequently.

[0064] Reference Fig. 9 The portion of the steel wire 23 not connected to the protective shell 19 penetrates into the interior of the plug rod 2 and extends to the upper end of the plug rod 2, and a pull ring 24 is fixed to the end of the steel wire 23, and the pull ring 24 is sleeved on the outer ring of the wire at the upper end of the plug rod 2;

[0065] A plurality of steel wires 23 are provided, and each steel wire 23 connects a plurality of protective shells 19 in series, and the portions of the steel wires 23 that are not connected to the protective shells 19 all penetrate into the insertion rod 2 and are slidably connected inside the insertion rod 2, playing the role of the steel wires 23, so as to prevent the coal from squeezing and wearing the surface of the steel wires 23 after repeated use, thereby reducing the possibility of the steel wires 23 being worn and broken, and a pull ring 24 is fixed to the upper end of the steel wires 23, so that the pull ring 24 can be pulled, and the pulling of multiple steel wires 23 can be realized, so that the protective shell 19 can be smoothly slidably connected to the moisture sensor 3.

[0066] Working principle: The cylinder 5 is stably placed on the surface of the coal pile at the measuring point through the base plate 12. When the insertion rod 2 needs to be placed inside the coal pile, the motor 25 is driven to rotate forward, the motor 25 drives the gear 26 to rotate, the gear 26 drives the gear ring 27 to rotate, the gear ring 27 drives the ring body 7 to rotate, the limit groove 10 of the inner ring of the ring body 7 is constrained by the guide bar 9, and the ring body 7 will drive the tube body 1 to rotate forward through the guide bar 9, the tube body 1 rotates and screws into the coal pile, and then the insertion rod 2 is inserted into the tube body 1;

[0067] When the pipe body 1 needs to be taken out from the coal pile, the driving motor 25 is reversed, the motor 25 drives the gear 26 to rotate, the gear 26 drives the gear ring 27 to rotate, the gear ring 27 drives the ring body 7 to rotate, the limit groove 10 of the inner ring of the ring body 7 is constrained by the guide bar 9, then the ring body 7 drives the pipe body 1 to rotate in the opposite direction through the guide bar 9, the pipe body 1 rotates and rotates out from the coal pile, and then the moisture content of the coal surface is measured;

[0068] After the measurement is completed, the rod 2 is pulled out of the coal pile. Before pulling it out, the pull ring 24 is pulled up, and the pull ring 24 pulls the steel wire 23. The steel wire 23 simultaneously drives all the protective shells 19 to move axially along the rod 2. The top plate 20 at the bottom of the protective shell 19 moves toward the moisture sensor 3. At the same time, the protective shell 19 is sleeved on the outer surface of the moisture sensor 3. At this time, the protective shell 19 wraps the moisture sensor 3, and then the rod 2 and the steel wire 23 are pulled up to pull the rod 2 together with the moisture sensor 3 out of the coal pile.

[0069] Obviously, the above embodiments are merely examples for clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the protection scope of the invention.

Claims

1. A device for measuring the moisture content of coal, characterized in that: include: An auxiliary unit, the auxiliary unit comprising a tube body (1), the two ends of the tube body (1) being open and hollow, and the outer wall of the lower half of the tube body (1) being a spiral structure; A detection unit, the detection unit comprising an insertion rod (2), a moisture sensor (3) being provided at the lower end of the insertion rod (2), the moisture sensor (3) transmitting detection data via a wire; Furthermore, the insertion rod (2) can be inserted into the tube body (1) and the moisture sensor (3) can be extended to the outside of the end of the tube body (1); A plurality of moisture sensors (3) are evenly arranged on the insertion rod (2), and the moisture sensors (3) are arranged along the axis direction of the insertion rod (2); A plurality of protection components are arranged on the insertion rod (2), each protection component is arranged one by one at a lower position of the moisture sensor (3), and each protection component is used to protect the moisture sensor (3); Each protection assembly comprises a cylindrical protection shell (19), a cross-shaped top plate (20) is provided at the lower end of the protection shell (19), and an upper end of the protection shell (19) is sleeved at the lower end edge of the moisture sensor (3); A cross-shaped telescopic groove (21) is provided at the axial position of the portion where the insertion rod (2) overlaps with the protective shell (19), the telescopic groove (21) radially penetrates to the outer surface of the insertion rod (2), a top plate (20) is slidably connected in the telescopic groove (21), a compression spring (22) is provided on the upper surface of the top plate (20), the compression spring (22) is pressed against the top surface position in the telescopic groove (21), and the top plate (20) can move in the telescopic groove (21) along the axial direction of the insertion rod (2); The outer surfaces of the plurality of protective shells (19) are connected in series via a steel wire (23); The portion of the steel wire (23) not connected to the protective shell (19) passes through the interior of the insertion rod (2) and extends to the upper end of the insertion rod (2), and a pull ring (24) is fixedly connected to the end of the steel wire (23), and the pull ring (24) is sleeved on the outer ring of the wire at the upper end of the insertion rod (2).

2. A coal moisture content measuring device according to claim 1, characterized in that: The outer ring of the tube body (1) is provided with a cylinder (5), the two ends of the cylinder (5) are open and hollow, the lower end of the cylinder (5) is vertically located at a measuring point on the coal pile, and the upper end of the cylinder (5) is provided with a driving assembly; The driving assembly comprises a plurality of support blocks (6) uniformly fixed to the upper port of the cylinder (5), the end of each support block (6) extending in the axial direction of the cylinder (5), a ring body (7) is provided at the axial position of the upper port of the cylinder (5), an annular groove (8) is provided on the outer ring of the ring body (7), and the end of each support block (6) is slidably connected to the annular groove (8); The inner ring of the ring body (7) penetrates the tube body (1), and a plurality of guide strips (9) are evenly arranged on the outer ring of the upper half of the tube body (1), and each guide strip (9) is slidably connected to a plurality of limit grooves (10) evenly arranged on the side wall of the inner ring of the ring body (7).

3. A coal moisture content measuring device according to claim 2, characterized in that: A rotation groove is provided on the inner side wall of each of the limiting grooves (10), a roller body (11) is rotatably connected in each rotation groove, and the guide strip (9) is slidably connected in the limiting groove (10) through the roller body (11).

4. A coal moisture content measuring device according to claim 2, characterized in that: The lower end of the cylinder (5) is fixedly connected to a base plate (12), and the lower end of the cylinder (5) passes through the base plate (12); strip openings (13) are provided on both sides of the upper surface of the base plate (12), and a cross bar (14) is provided in each strip opening (13), and a rectangular frame (15) is symmetrically slidably connected to each cross bar (14).

5. A coal moisture content measuring device according to claim 4, characterized in that: A pull rod (16) is fixedly connected to the upper ends of two adjacent rectangular frames (15), and the lower end of each rectangular frame (15) is arranged in a pointed shape.

6. A coal moisture content measuring device according to claim 5, characterized in that: A plurality of groups of protrusions (17) adapted to the crossbar (14) are provided on the inner side wall of each rectangular frame (15), and each group of protrusions (17) is respectively arranged at a position close to the upper end and the lower end of the rectangular frame (15).

7. A coal moisture content measuring device according to claim 2, characterized in that: A plugging assembly is provided in the tube body (1), the plugging assembly comprising a vertical rod (18), the lower end of the vertical rod (18) being in a conical shape, the lower end of the vertical rod (18) being threadedly connected to the inner side wall of the lower end of the tube body (1), and the upper end of the vertical rod (18) protruding from the upper end of the tube body (1).

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