Belt conveying as-fired coal sample automatic sampler

Abstract

The utility model belongs to the technical field of sampling, and particularly relates to an automatic coal sample sampler for coal as fired conveyed by a belt, which comprises a support plate, and a support plate, a sampling machine, a primary screw feeder, a single-bucket elevator, a secondary screw feeder, a crusher, a divider, a sample collector and a temporary storage hopper are sequentially arranged on the support plate from left to right. The device has the functions of sampling, crushing, division, sample collection, residual coal return and the like, and is in a full-sealing design, so that gun ash and coal leakage are avoided. In addition, operation of the sampling device is not affected by wet coal with the surface water content smaller than 15%. And the sampling device is not easy to block coal in the operation process.

Description

Technical Field

[0001] The utility model relates to the technical field of sampling, in particular to an automatic sampling device for the coal sample of the belt-conveyed coal fed into the furnace. Background Technique

[0002] In 2020, the power plant completed the transformation of the second-phase sludge project. The sludge was incorporated into the coal conveying system at the belt conveyors 6A / B. The original sampling device for the coal fed into the furnace was installed at 8A / B. Due to the uneven mixing of coal powder and sludge, when the sampling device at this location sampled, the coal sample was affected by the sludge, and the measured value of the coal sample composition fluctuated greatly. Now it is necessary to transform the original sampling device. The main reasons are as follows: There will be phenomena of coal scattering and coal leakage during the operation of the existing sampling device, and the reliability is low. Therefore, an automatic sampling device for the coal sample of the belt-conveyed coal fed into the furnace is invented. Content of the Utility Model

[0003] In view of the above and / or existing problems in an automatic sampling device for the coal sample of the belt-conveyed coal fed into the furnace, the present utility model is proposed.

[0004] Therefore, the purpose of the present utility model is to provide an automatic sampling device for the coal sample of the belt-conveyed coal fed into the furnace, which can solve the above-mentioned existing problems.

[0005] To solve the above technical problems, according to one aspect of the present utility model, the following technical solutions are provided:

[0006] An automatic sampling device for the coal sample of the belt-conveyed coal fed into the furnace, which includes a support plate. On the support plate, there are successively arranged a support plate, a sampling machine, a primary screw feeder, a single-bucket elevator, a secondary screw feeder, a crusher, a splitter, a sample collector and a temporary storage hopper from left to right. The discharge port of the sampling machine corresponds to the feed port of the primary screw feeder. The discharge port of the primary screw feeder corresponds to the feed port of the single-bucket elevator. The discharge port of the single-bucket elevator corresponds to the feed port of the secondary screw feeder. The discharge port of the secondary screw feeder corresponds to the feed port of the crusher. The discharge port of the crusher corresponds to the feed port of the splitter. One side discharge port of the splitter corresponds to the feed port of the sample collector. The other side discharge port of the splitter corresponds to the feed port of the temporary storage hopper.

[0007] As a preferred scheme of an automatic sampling device for the coal sample of the belt-conveyed coal fed into the furnace according to the present utility model, wherein: the single-bucket elevator includes:

[0008] A bottom frame;

[0009] A middle frame, which is arranged on the top of the bottom frame;

[0010] An upper frame, which is arranged on the top of the middle frame;

[0011] An outer sealing plate assembly, which is fixedly installed on the left sides of the bottom frame body, the middle frame body and the upper frame body.

[0012] As a preferred solution of an automatic sampling device for belt-conveyed coal samples entering the furnace of the present utility model, wherein: the single-bucket elevator further includes:

[0013] A feed inlet assembly, which is arranged on the left side of the bottom frame body;

[0014] A feeding outlet, which is arranged on the right side of the upper frame body.

[0015] As a preferred solution of an automatic sampling device for belt-conveyed coal samples entering the furnace of the present utility model, wherein: the single-bucket elevator further includes:

[0016] A steel wire rope;

[0017] A driving device capable of winding or releasing the steel wire rope, which is arranged on the top left side of the outer sealing plate assembly. One end of the steel wire rope is connected to the driving device, and the other end of the driving device is fixedly connected to the feed inlet assembly through a pulley on the top of the upper frame body.

[0018] As a preferred solution of an automatic sampling device for belt-conveyed coal samples entering the furnace of the present utility model, wherein: the single-bucket elevator further includes:

[0019] A guide rail assembly, which is arranged on the bottom frame body, the middle frame body and the upper frame body, and the feed inlet assembly is slidably connected to the guide rail assembly;

[0020] A hopper reset device, which is arranged at the end of the guide rail assembly.

[0021] As a preferred solution of an automatic sampling device for belt-conveyed coal samples entering the furnace of the present utility model, wherein: the temporary storage hopper includes:

[0022] A hopper with a discharge opening at its bottom;

[0023] A cover plate, which is arranged on the top of the hopper;

[0024] A rotating door with a U-shaped shape, both ends of the hopper are rotatably connected to the rotating door through pedestal bearings, and the bottom end of the rotating door is in contact with the bottom of the hopper to block the discharge opening;

[0025] A push rod bracket, which is fixedly installed on one side of the hopper;

[0026] An electric push rod, which is fixedly installed on the push rod bracket through a push rod mounting seat;

[0027] A locking shaft, which is rotatably connected in the revolving door, and the push rod of the electric push rod is fixedly connected to the locking shaft.

[0028] As a preferred solution of the automatic sampling device for belt-conveyed furnace coal samples of the present utility model, wherein: the temporary storage hopper further includes:

[0029] A limit switch, which is fixedly installed on the outer side of the hopper through a limit switch seat;

[0030] A dial, which is fixedly installed on the outer side of the revolving door, and the revolving door is located on one side of the limit switch.

[0031] Compared with the prior art:

[0032] The present utility model has functions such as sampling, crushing, splitting, sample collection and return of remaining coal, and is fully sealed, without dust flying and coal leakage. In addition, the operation of the sampling device is not affected by wet coal with a surface moisture content less than 15%. Moreover, the sampling device is not prone to coal blockage during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a front view schematic diagram of the structure of the present utility model;

[0034] Figure 2 It is a front view schematic diagram of the structure of the single-bucket elevator of the present utility model;

[0035] Figure 3 It is a side view schematic diagram of the structure of the single-bucket elevator of the present utility model;

[0036] Figure 4 It is a front view schematic diagram of the temporary storage hopper of the present utility model;

[0037] Figure 5 It is a side view schematic diagram of the temporary storage hopper of the present utility model.

[0038] In the figure: support plate 100, sampler 110, primary screw feeder 120, single-bucket elevator 130, secondary screw feeder 140, crusher 150, splitter 160, sample collector 170, temporary storage hopper 180, upper frame body 1, feeding outlet 2, steel wire rope 3, hopper reset device 4, guide rail assembly 5, drive device 6, middle frame body 7, outer sealing plate assembly 8, bottom frame body 9, feeding port assembly 10, hopper 11, cover plate 12, push rod support 13, push rod mounting seat 14, electric push rod 15, locking shaft 16, pedestal bearing 17, revolving door 18, limit switch seat 19, limit switch 20, dial 21. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0039] To make the objectives, technical solutions, and advantages of the present utility model clearer, the following will further describe in detail the embodiments of the present utility model in conjunction with the accompanying drawings.

[0040] The present utility model provides an automatic sampling device for coal samples of belt-conveyed coal fed into a furnace. Please refer to Figures 1 - 5 , which includes a support plate 100. On the support plate 100, there are successively arranged from left to right a support plate 100, a sampling machine 110, a primary screw feeder 120, a single-bucket elevator 130, a secondary screw feeder 140, a crusher 150, a splitter 160, a sample collector 170, and a temporary storage hopper 180. The discharge port of the sampling machine 110 corresponds to the feed port of the primary screw feeder 120. The discharge port of the primary screw feeder 120 corresponds to the feed port of the single-bucket elevator 130. The discharge port of the single-bucket elevator 130 corresponds to the feed port of the secondary screw feeder 140. The discharge port of the secondary screw feeder 140 corresponds to the feed port of the crusher 150. The discharge port of the crusher 150 corresponds to the feed port of the splitter 160. One side discharge port of the splitter 160 corresponds to the feed port of the sample collector 170. The other side discharge port of the splitter 160 corresponds to the feed port of the temporary storage hopper 180.

[0041] Among them:

[0042] Regarding the sampling machine 110: The sampling machine collects the full cross-section from the middle of the conveyor belt with a flow rate of 1500 t / h at the time intervals set on the timer, so that the collected samples are representative. When setting the time intervals, it can be set arbitrarily according to user requirements. By changing the set value, the sampling frequency of the sampling machine per unit time can be changed, thereby changing the collection amount of the system.

[0043] Regarding the primary screw feeder 120: The primary screw feeder can adopt a U-shaped structure, so that the upper cover can be conveniently opened for maintenance. Good sealing can effectively prevent the loss of moisture and the leakage of dust, and can control the uniformity of feeding, so that the samples enter the single-bucket elevator evenly, thereby preventing the possibility of blockage of subsequent equipment due to too fast or too fierce feeding. Its feed port and discharge port are hermetically connected by flanges.

[0044] Regarding the single-bucket elevator 130: The single-bucket elevator is a vertical conveying device, belonging to the single-bucket lifting and discharging type, suitable for conveying granular materials. This device is small in size, beautiful in appearance, large in conveying capacity, good in sealing, preventing coal from spilling, and has the functions of coal blockage alarm and shutdown. Its transmission device adopts an axle-mounted suspended reducer and coupling transmission, with a compact structure, reliable transmission, and good anti-reverse performance. The single-bucket elevator is used to lift and convey the coal samples.

[0045] Regarding the secondary screw feeder 140: The secondary screw feeder can adopt a U-shaped structure, and its inlet and outlet are both hermetically connected by flanges, which has the same structure as the primary feeder.

[0046] Regarding the crusher 150: The crusher is used to crush the material into coal particles of 13 mm. The crusher operates at a constant speed to obtain products with consistent specifications. By adjusting the position of the ring hammers, the rotation direction, and installing screening bars with different apertures and shapes, the size of the products can be changed. The crushing components are wear-resistant, and the service life of the crushing plates and hammers is not less than 8000 hours. It is easy to disassemble and there will be no coal blockage even when the moisture content is relatively high. The crusher is equipped with a foreign matter removal chamber, and the non-easily crushed foreign matters are removed to the foreign matter removal chamber for treatment by opening the casing. The crusher is provided with a protection device. To ensure the normal operation of the system, when large and non-easily crushed materials enter the crusher, the equipment will not be damaged, which further ensures the safety of personnel.

[0047] Regarding the splitter 160: The splitter is a horizontal rotary splitter with relatively high splitting accuracy and few errors. When splitting the sample coal with a total moisture content ≤ 16%, there will be no adhesion, blockage, etc. inside the machine. The splitting drum evenly cuts the falling material flow during rotation, and the material falling into the receiving hopper is the material collected after splitting for use in the next process, while the uncollected material is called waste material.

[0048] Regarding the sample collector 170: The sample collector consists of a motor, a reducer, a rotating platform, sample cans, etc., and is equipped with a can position identification device. It is made of stainless steel with a capacity of 30 L. The connection between the sample collector and the coal dropping pipe is designed to be sealed without gaps and no dust leakage, which can effectively prevent moisture loss. The sample collector has the characteristics of large capacity, light weight, corrosion resistance, wear resistance, and long service life. This device adopts manual can taking according to the site requirements, and the operation and maintenance are simple, safe and reliable. Six sample cans are placed on the track, which is convenient for the sampling personnel to load and unload. The sample cans adopt an external handle in terms of structure, which is convenient for the handling of the sample cans. The sample cans have a large opening, which is convenient for the staff to take samples.

[0049] Regarding the temporary storage hopper 180: The waste temporary storage hopper is a material temporary storage device that temporarily stores the coal samples discarded by the splitter in the hopper and then automatically sends the coal samples into the belt feeder. The hopper wall is processed from steel plates, and an electric push rod is used to open and close the door below it.

[0050] The working principle is as follows: The sampling machine 110 scrapes the coal sample of the full cross-section horizontally from the main coal conveyor belt. At this time, the sample will flow into the primary spiral feeder 120, and is transported to the crusher 150 by the single-bucket elevator 130 and the secondary spiral feeder 140 for crushing. After crushing, the crushed sample will be reduced in size by the splitter 160. Part of the coal sample after reduction will be sent into the sample collector 170 for coal sample analysis, and the other part of the coal sample will enter the temporary storage hopper 180 for storage. In addition, when not sampling, the remaining coal returns to the main conveyor belt.

[0051] The single-bucket elevator 130 includes: an upper frame body 1, a feeding outlet 2, a steel wire rope 3, a hopper reset device 4, a guide rail assembly 5, a driving device 6 capable of winding or releasing the steel wire rope 3, a middle frame body 7, an outer sealing plate assembly 8, a bottom frame body 9, and a feeding port assembly 10;

[0052] The middle frame body 7 is arranged on the top of the bottom frame body 9, the upper frame body 1 is arranged on the top of the middle frame body 7, the outer sealing plate assembly 8 is fixedly installed on the left sides of the bottom frame body 9, the middle frame body 7 and the upper frame body 1, the feeding port assembly 10 is arranged on the left side of the bottom frame body 9, the feeding outlet 2 is arranged on the right side of the upper frame body 1, the driving device 6 is arranged on the top left side of the outer sealing plate assembly 8, one end of the steel wire rope 3 is connected to the driving device 6, and the other end of the driving device 6 is fixedly connected to the feeding port assembly 10 through an I-shaped pulley on the top of the upper frame body 1. The guide rail assembly 5 is arranged on the bottom frame body 9, the middle frame body 7 and the upper frame body 1, and the feeding port assembly 10 is slidably connected to the guide rail assembly 5. The hopper reset device 4 is arranged at the end of the guide rail assembly 5. Among them, the driving device 6 includes but is not limited to a motor and a drum. The drum is rotatably connected to the outer sealing plate assembly 8, the motor is connected to the drum, and one end of the steel wire rope 3 is fixedly installed on the drum. In addition, the feeding port assembly 10 is set as the first hopper.

[0053] The temporary storage hopper 180 includes: a hopper 11 with a discharge port at its bottom, a cover plate 12, a push rod support 13, a push rod mounting seat 14, an electric push rod 15, a locking shaft 16, a pedestal bearing 17, a rotating door 18 with a U-shaped shape, a limit switch seat 19, a limit switch 20, and a dial 21;

[0054] The cover plate 12 is provided at the top end of the hopper 11. Both ends of the hopper 11 are rotatably connected to the rotary door 18 through the pedestal bearings 17, and the bottom end of the rotary door 18 is in contact with the bottom of the hopper 11 to be able to block the discharge opening. The push rod bracket 13 is fixedly installed on one side of the hopper 11. The electric push rod 15 is fixedly installed on the push rod bracket 13 through the push rod mounting seat 14. The locking shaft 16 is rotatably connected in the rotary door 18, and the push rod of the electric push rod 15 is fixedly connected to the locking shaft 16. The limit switch 20 is fixedly installed on the outside of the hopper 11 through the limit switch seat 19. The dial 21 is fixedly installed on the outside of the rotary door 18, and the rotary door 18 is located on one side of the limit switch 20.

[0055] The working principle of the temporary storage hopper 180: The electric push rod 15 is used to make the rotary door 18 rotate around the pedestal bearing 17 as the center point to control the closing of the discharge opening.

[0056] Although the present invention has been described above with reference to the embodiments, various improvements can be made to it and components therein can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the disclosed embodiments of the present invention can be combined with each other in any way. The exhaustive description of these combinations is not given in this specification only for the sake of saving space and resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An automatic sampler for taking coal samples from a furnace by conveying the coal into the furnace by a belt, comprising a support plate (100), characterized in that: The support plate (100), a sampler (110), a primary screw feeder (120), a single bucket elevator (130), a secondary screw feeder (140), a crusher (150), a reducer (160), a sample collector (170) and a temporary storage hopper (180) are arranged on the support plate (100) from left to right. The discharge port of the sampler (110) corresponds to the feed port of the primary screw feeder (120), and the discharge port of the primary screw feeder (120) corresponds to the feed port of the single bucket elevator (130). Correspondingly, the discharge port of the single-bucket elevator (130) corresponds to the feed port of the secondary screw feeder (140), the discharge port of the secondary screw feeder (140) corresponds to the feed port of the crusher (150), the discharge port of the crusher (150) corresponds to the feed port of the reducer (160), a discharge port on one side of the reducer (160) corresponds to the feed port of the sample collector (170), and a discharge port on the other side of the reducer (160) corresponds to the feed port of the temporary storage hopper (180).

2. The automatic sampler for sampling coal transported by belt into furnace according to claim 1 is characterized in that: The single bucket elevator (130) comprises: Bottom frame (9); A middle frame (7), wherein the middle frame (7) is arranged on the top of the bottom frame (9); An upper frame (1), the upper frame (1) being arranged on the top of the middle frame (7); An outer sealing plate assembly (8) is fixedly mounted on the left side of the bottom frame (9), the middle frame (7) and the upper frame (1).

3. The automatic sampler for sampling coal transported by belt into furnace according to claim 2 is characterized in that: The single bucket elevator (130) further comprises: A feed inlet assembly (10), wherein the feed inlet assembly (10) is arranged on the left side of the bottom frame (9); A loading outlet (2), wherein the loading outlet (2) is arranged on the right side of the upper frame (1).

4. The automatic sampler for sampling coal transported by belt into furnace according to claim 3 is characterized in that: The single bucket elevator (130) further comprises: Steel wire rope (3); A drive device (6) capable of winding or releasing a steel wire rope (3), the drive device (6) being arranged on the left side of the top end of an outer sealing plate assembly (8), one end of the steel wire rope (3) being connected to the drive device (6), and the other end of the drive device (6) being fixedly connected to a feed port assembly (10) via an I-shaped wheel at the top of an upper frame (1).

5. The automatic sampler for sampling coal transported by belt into furnace according to claim 4 is characterized in that: The single bucket elevator (130) further comprises: A guide rail assembly (5), wherein the guide rail assembly (5) is arranged on the bottom frame (9), the middle frame (7) and the upper frame (1), and the feed port assembly (10) is slidably connected to the guide rail assembly (5); A hopper resetting device (4) is provided on the end of the guide rail assembly (5).

6. The automatic sampler for sampling coal transported into the furnace by a belt according to claim 1, characterized in that: The temporary storage hopper (180) comprises: A hopper (11) having a discharge port at its bottom; A cover plate (12), wherein the cover plate (12) is arranged on the top of the hopper (11); The shape of the revolving door (18) is set to be U-shaped, and both ends of the hopper (11) are rotatably connected to the revolving door (18) through seat bearings (17), and the bottom end of the revolving door (18) contacts the bottom of the hopper (11) so as to block the discharge port; A push rod bracket (13), wherein the push rod bracket (13) is fixedly mounted on one side of the hopper (11); An electric push rod (15), wherein the electric push rod (15) is fixedly mounted on the push rod bracket (13) via a push rod mounting seat (14); A lock shaft (16) is rotatably connected to the revolving door (18), and a push rod of the electric push rod (15) is fixedly connected to the lock shaft (16).

7. The automatic sampler for sampling coal transported by belt into furnace according to claim 6, characterized in that: The temporary storage hopper (180) further comprises: A limit switch (20), wherein the limit switch (20) is fixedly mounted on the outer side of the hopper (11) via a limit switch seat (19); A paddle (21) is fixedly mounted on the outer side of a revolving door (18), and the revolving door (18) is located on one side of the limit switch (20).

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