Falling flow sampler of coal feeder

Abstract

The invention relates to a falling flow sampler of a coal feeder, a sampling device reciprocates along the section direction of coal flow through a reciprocating driving mechanism, and the inner wall of one side of the sampling device is obliquely arranged; the sample containing device is arranged below the sampling device and located on the outer side of the vertical direction of coal flow; the connecting space of the sample containing device and the sampling device is opened and closed through a first isolation door, the connecting space of the sample containing device and the outside is opened and closed through a second isolation door, and the first isolation door and the second isolation door are interlocked through a linkage mechanism; according to the invention, the standard of coal sample collection is ensured, and meanwhile, the equipment is sealed to prevent pulverized coal from being thrown and polluting the environment. The sampling device reciprocates for multiple times in a short time through the reciprocating driving mechanism along the cross section direction of the coal flow, so that multiple times of quick sampling in the short time is realized on the basis of completely sampling the whole cross section of the coal flow.

Description

Technical Field

[0001] The invention relates to the technical field of coal quality sample extraction, and in particular to a coal feeder falling flow sampler. Background Art

[0002] Currently, coal sampling products and equipment on the market vary in form and use case. With the increasing sophistication of power generation, refined coal blending and combustion has become widespread across power companies. Combining coal from different coal qualities stored in various coal bunkers, tailored to boiler characteristics, has become common practice. Incoming coal sampling devices cannot provide accurate information on the actual coal quality of each feeder over a short period of time. This uneven coal quality poses a significant risk to the stable operation of the boiler. There is an urgent need for a sampling device that can capture the instantaneous coal flow at each feeder to facilitate inspection and verification of coal blending and combustion progress.

[0003] The existing sampling method usually involves opening temporary sampling holes in the raw coal bunker and manually sampling with a sampling shovel. Due to the dynamic coal flow in the bunker, sampling cannot be completed in a standard manner, the coal samples collected are not representative, and there is a significant pollution to the environment. This is not conducive to the company's refined management.

[0004] Alternatively, patent number CN119827237A discloses a "coal conveyor and fall flow sampling device," which includes a coal conveying mechanism, a splitter conveyor mechanism, a sampling mechanism, and a discarded sample collection mechanism. Coal flows through a sampling port onto a sampling belt, collecting samples from the entire fall flow cross-section and effectively preventing sampling bias. The collected coal samples are then transported via the sampling belt for subsequent testing.

[0005] However, the existing technology cannot achieve multiple rapid sampling in a short period of time based on complete sampling of the entire cross-section of the coal flow. At the same time, the coal is under positive pressure during transportation, which easily causes coal overflow during the coal sampling process. Summary of the Invention

[0006] In view of the deficiencies in the prior art, the present invention provides a coal feeder falling flow sampler to solve the above problems.

[0007] The present invention provides the following technical solutions: A coal feeder falling flow sampler, comprising: A sampling device, the sampling device is reciprocated along the cross-sectional direction of the coal flow by a reciprocating drive mechanism, and the inner wall of one side of the sampling device is inclined; A sample container, which is arranged below the sampling device and outside the coal flow in a vertical direction; The connection space between the sample container and the sampling container is opened and closed by a first isolation door, and the connection space between the sample container and the outside is opened and closed by a second isolation door. The first isolation door and the second isolation door are interlocked by a linkage mechanism.

[0008] Preferably, the linkage mechanism includes a conveyor belt assembly, in which the front conveyor belt and the rear conveyor belt moving in opposite directions are respectively provided with a first connecting part and a second connecting part, the first connecting part is connected to the first isolation door, and the second connecting part is connected to the second isolation door.

[0009] Preferably, the first isolation door is fixed on the first connecting part and moves linearly to open and close the connection space between the sample container and the sampling container, and the second isolation door opens and closes the connection space between the sample container and the outside by rotation. The rotation part of the second isolation door is provided with a first limiting tooth, and also includes a first rack moving along the axis of the first limiting tooth. The first rack tends to maintain engagement with the first rack through a reset spring, and the movement of the second connecting part pushes the abutting first rack to separate from the first limiting tooth.

[0010] Preferably, a second limiting tooth is coaxially arranged at the reel in the conveyor belt assembly, a guide column is eccentrically arranged on one side of the first limiting tooth, and also includes a second rack that moves linearly along the axis perpendicular to the second limiting tooth and approaches the second limiting tooth, and a guide block is movably connected to the second rack along the axis of the second limiting tooth, and the guide column is movably fitted in a slide groove on the guide block.

[0011] Preferably, a guide rail is further included, and the sampling device is provided with a guide wheel rolling on the guide rail.

[0012] Preferably, the guide rail includes an upper guide rail and a lower guide rail distributed up and down, the outer diameter of the guide wheel is smaller than the distance between the upper guide rail and the lower guide rail, and a convex point is provided on the side of the lower guide rail close to the upper guide rail.

[0013] Preferably, the inner cavity of the sample container is divided into a plurality of independent storage spaces along the axial direction of the guide wheel, and the sampling container is connected to the guide wheel via a multi-stage telescopic assembly.

[0014] Preferably, it also includes a first switch, a second switch and a third switch, the first switch is electrically connected to the multi-stage telescopic assembly, and the first switch is triggered when the sampling instrument moves back and forth to the initial position; the second switch and the third switch are located on opposite sides of the sampling instrument, and are respectively used to control the two extreme positions of the sampling instrument moving along the telescopic direction of the multi-stage telescopic assembly.

[0015] Preferably, the second switch and the third switch are both electrically connected to the conveyor belt assembly.

[0016] Preferably, a partition is provided between the sampling device and the reciprocating drive mechanism.

[0017] The present invention has the following beneficial technical effects: The present invention ensures the standardization of coal sample collection and simultaneously seals the equipment to prevent coal powder from being scattered and polluting the environment.

[0018] The sampling device of the present invention performs multiple reciprocating movements along the cross-section of the coal flow in a short time through a reciprocating driving mechanism, thereby realizing multiple rapid samplings in a short time on the basis of complete sampling of the entire cross-section of the coal flow.

[0019] The first isolation door and the second isolation door of the present invention are interlocked. At the same time, only one of the first isolation door and the second isolation door is in an open state, and the other isolation door is in a closed state, thereby preventing the overflow of coal dust caused by the automatic positive pressure of the coal sample conveyor during the sampling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a partial structural diagram of the present invention; Figure 2 This is a complete structural diagram of the present invention; Figure 3 A cross-sectional view of the sampling device of the present invention and its matching components; Figure 4 for Figure 2 A magnified schematic diagram of a local area A; Figure 5 Schematic diagram of the linkage mechanism of the present invention; Figure 6 for Figure 5 A partial enlarged schematic diagram; Figure 7 This is a schematic diagram of the cooperation between the first limiting tooth and the second limiting tooth of the present invention; Figure 8 Schematic diagram of the sampling device and guide rail of the present invention.

[0021] The reference numerals in the figures are: 1. Coal sample conveyor; 2. Coal flow; 3. Reciprocating drive mechanism; 4. Sampling device; 41. Guide wheel; 42. Multi-stage telescopic assembly; 43. First switch; 44. Second switch; 45. Third switch; 5. Guide rail; 51. Upper guide rail; 52. Lower guide rail; 53. Bump; 6. Sample container; 7. Partition; 81. First isolation door; 82. Second isolation door; 821. First limit tooth; 822. Guide column; 83. Conveyor belt assembly; 84. First connecting part; 85. Second connecting part; 86. First rack; 87. Return spring; 88. Second limit tooth; 89. Second rack; 891. Sliding column; 892. Guide block. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0023] The coal sample conveyor 1 is located in a first space isolated from the external space and is used to convey coal. The first space where the coal sample conveyor 1 is located is under positive pressure. The coal sample conveyor 1 conveys coal to form a coal flow 2.

[0024] Example 1: A coal feeder falling flow sampler, such as Figure 1-4 As shown: it includes a reciprocating drive mechanism 3, a sampling device 4, a guide rail 5 and a sample container 6.

[0025] The reciprocating drive mechanism 3 can be composed of a wheel and an eccentric push rod mounted on the wheel. The rotation of the wheel and the eccentric push rod cooperate to push the connected sampling device 4 in horizontal reciprocating linear motion guided by the guide rail 5. The sampling device 4 moves along the cross section of the coal flow 2. The eccentric push rod's movable space is offset from the coal flow 2.

[0026] like Figure 4 As shown, the guide rail 5 includes an upper guide rail 51 and a lower guide rail 52 arranged horizontally, and the top wall of the lower guide rail 52 is evenly provided with multiple groups of convex points 53 with smaller curvatures along the cross section of the coal flow 2; Figure 3 As shown, a guide wheel 41 is rotatably connected to one side wall of the sampling device 4. The guide wheel 41 rolls between the upper guide rail 51 and the lower guide rail 52. Baffles are provided on both sides of the guide wheel 41 to prevent it from escaping from between the upper guide rail 51 and the lower guide rail 52. The outer diameter of the guide wheel 41 is slightly smaller than the distance between the upper guide rail 51 and the lower guide rail 52. When the sampling device 4 moves horizontally between the upper guide rail 51 and the lower guide rail 52 via the guide wheel 41 , the guide wheel 41 is bumped and vibrated by the convex point 53 , thereby preventing the coal in the sampling device 4 from adhering to the inner wall thereof.

[0027] One side inner wall of the sampling device 4 is arranged to be inclined from top to bottom, and the top opening of the sampling device 4 is narrowed toward the bottom opening thereof through the inclined inner wall.

[0028] like Figure 1 As shown, under normal circumstances, the sampling device 4 is located on the horizontal side of the coal flow 2 and is in a stationary and non-working state. When the coal flow 2 on the coal sample conveyor 1 falls, the sampling device 4 and the sample container 6 do not affect the normal operation of the coal flow 2. The coal flow 2 enters the next stage of the system through the drop port below.

[0029] The coal sample conveyor 1, the coal flow 2 and the sample container 6 are relatively located in the first space, and the reciprocating drive mechanism 3 is located in the second space. Figure 2 The first space and the second space are separated by a partition 7, which can prevent most dusty coal from entering the second space and affecting the reciprocating drive mechanism 3, and a through groove is provided on the partition 7 for the eccentric push rod to pass through.

[0030] The sample container 6 is relatively located in the third space, and a first isolation door 81 is provided at the connection between the third space and the first space. The movement of the first isolation door 81 realizes the connection or closure between the third space and the first space; a second isolation door 82 is provided at the connection between the third space and the external space. The movement of the second isolation door 82 realizes the connection or closure between the third space and the external space.

[0031] The first isolation door 81 and the second isolation door 82 are interlocked through a linkage mechanism.

[0032] Working principle: During use, the second isolation door 82 is opened, the sample container 6 is placed in the third space, and the second isolation door 82 is closed. The reciprocating drive mechanism 3 is then activated to propel the sample container 4 back and forth along the cross-section of the coal flow 2, returning it to its original position. This completes a single coal flow sampling operation. When the sample container 4 reaches the position of the coal flow 2, it guides the collected coal through its bottom opening into the sample container 6.

[0033] The characteristics of the reciprocating drive mechanism 3 can perform multiple reciprocating motions within a short period of time (eg, 15 seconds), thereby enabling multiple sampling of the coal flow 2 within a short period of time.

[0034] When the sampling device 4 needs to be taken out, the first isolation door 81 is closed, and the second isolation door 82 is opened to take out the sampling device 4 with the coal sample.

[0035] Example 2: Contains all the contents of Example 1, except that Figure 5-Figure 7 As shown: The linkage mechanism includes a horizontally arranged conveyor belt assembly 83. The front conveyor belt and the rear conveyor belt of the conveyor belt assembly 83 are respectively provided with a first connecting portion 84 and a second connecting portion 85. The movement of the conveyor belt assembly 83 causes the first connecting portion 84 and the second connecting portion 85 to move synchronously in opposite directions. The first connecting portion 84 is fixedly connected to the first isolation door 81. The first isolation door 81 moves horizontally and linearly to open or close the connection between the third space and the first space; the second isolation door 82 rotates relatively to open or close the connection between the third space and the external space; like Figure 6As shown, the rotation point of the second isolation door 82 is coaxially connected to the first limiting tooth 821. In the third space, a first rack 86 is linearly connected and slides along the axis of the first limiting tooth 821. A return spring 87 is provided between the first rack 86 and the inner wall of the third space. The elastic force of the return spring 87 pushes the first rack 86 toward engagement with the first limiting tooth 821. When the first rack 86 and the first limiting tooth 821 are engaged, the second isolation door 82 cannot rotate. The end of the first limiting tooth 821 is chamfered to facilitate engagement with the first rack 86, and one end of the first rack 86 is relatively located on the movement path of the second connecting portion 85. A second limiting tooth 88 is provided at the end of the conveyor belt assembly 83. During the movement of the conveyor belt assembly 83, the second limiting tooth 88 is driven to rotate accordingly. The axes of the first limiting tooth 821 and the second limiting tooth 88 are perpendicular to each other. Figure 7 As shown, a guide column 822 is provided at the eccentric position of the first limiting tooth 821; a sliding column 891 is fixedly provided in the third space, and the sliding column 891 is linearly slidably connected to the second rack 89. Under the guidance of the sliding column 891, the second rack 89 approaches or moves away from the second limiting tooth 88 in the radial direction of the second limiting tooth 88, so that the second rack 89 is engaged or separated from the second limiting tooth 88; a guide block 892 is axially slidably connected to the second limiting tooth 88 on the second rack 89, and a sliding groove is provided on the guide block 892. The guide column 822 slides linearly relative to the sliding groove of the guide block 892 (along the axis of the second limiting tooth 88).

[0036] Working principle: like Figure 5 As shown, when the first isolation door 81 is in a state of closing the connection between the third space and the first space, the second connection portion 85 moves to the right limit position, and the second connection portion 85 pushes the abutting first rack 86 and the first limit tooth 821 to separate, and then the external user can manually drive the second isolation door 82 to rotate; When the conveyor belt assembly 83 drives the first connecting portion 84 to move leftward so that the first isolation door 81 is in the connection between the closed third space and the first space, the second connecting portion 85 just abuts against the first rack 86. Then the conveyor belt assembly 83 drives the first connecting portion 84 to move a short distance to the left to the left limit position. During this process, the second connecting portion 85 continues to move a short distance to push the abutting first rack 86 away from the first limit tooth 821. The conveyor belt assembly 83 drives the first connecting part 84 to move to the right to the right limit, so that the first isolation door 81 is in a state of opening the connection between the third space and the first space. At this time, the sampling device 4 can guide the sampled coal flow 2 to the sample holding device 6. At this time, the second connecting part 85 moves to the left to the left limit, and the first rack 86 engages with the first rack 86 under the elastic force of the return spring 87, realizing a closed connection state between the third space and the external space.

[0037] like Figure 7 As shown, the conveyor belt assembly 83 can only move when the connection between the third space and the external space is in a closed state, at which time the second rack 89 and the second limiting tooth 88 are in a separated state.

[0038] When the second isolation door 82 rotates to the state of opening the connection between the third space and the external space, the rotation of the second isolation door 82 drives the guide column 822 to rotate through the first limiting tooth 821, and the rotation of the guide column 822 drives the second rack 89 to approach the second limiting tooth 88 and engage through the guide block 892.

[0039] Through the cooperation of the above-mentioned components, it can be achieved that when the first isolation door 81 is in the open state, the second isolation door 82 is in the closed state. At this time, the first limit tooth 821 and the first rack 86 engage with each other to prevent the second isolation door 82 from being opened by external force; and only after the second isolation door 82 is in the closed state can the first isolation door 81 be controlled to open; thereby preventing the positive pressure in the space where the coal sample conveyor 1 is located from causing the powdered coal to overflow.

[0040] Example 3: Contains all the contents of Example 2, except that Figure 8 As shown: The inner cavity of the sample container 6 is divided into multiple independent storage spaces along the axial direction of the guide wheel 41. The sampling container 4 is connected to the guide wheel 41 through a multi-stage telescopic component 42. The telescopic direction of the multi-stage telescopic component 42 is consistent with the axial direction of the guide wheel 41. The multi-stage telescopic component 42 can adopt an electric telescopic rod or an electric multi-stage telescopic cylinder structure. The eccentric push rod in the reciprocating drive mechanism 3 is movably connected to the sampling apparatus 4 along the axial direction of the guide wheel 41; a first switch 43, a second switch 44 and a third switch 45 are also provided in the first space, and the first switch 43, the second switch 44 and the third switch 45 are all electrically connected to the multi-stage telescopic assembly 42, and the second switch 44 and the third switch 45 are used together to control the front and rear limit of the axial movement of the sampling apparatus 4 along the guide wheel 41.

[0041] When the reciprocating drive mechanism 3 drives the sampling apparatus 4 to move back and forth once to its initial position, it triggers the first switch 43 once. This triggering of the first switch 43 controls the multi-stage telescopic assembly 42 to extend a predetermined distance, thereby driving the sampling apparatus 4 to move a predetermined distance axially along the guide wheel 41 until the sampling apparatus 4 moves to the point where the second switch 44 is triggered and the reciprocating drive mechanism 3 stops. At this point, the sampling apparatus 4 moves to its initial position. The multi-stage telescopic assembly 42 then shortens until the third switch 45 is triggered by the sampling apparatus 4 to its initial state. This allows the reciprocating drive mechanism 3 to propel the sampling apparatus 4 to rapidly sample the coal flow multiple times in a short period of time.

[0042] The bottom opening of the sampling device 4 is aligned with one of the storage spaces of the sample container 6. The sampling device 4 moves a set distance axially along the guide wheel 41, and the bottom opening of the sampling device 4 is controlled to move to align with another adjacent storage space of the sample container 6, so that the sampling device 4 moves back and forth to guide the coal flow to different storage spaces of the sample container 6.

[0043] The above-described embodiments merely represent specific implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, and all such variations and improvements fall within the scope of protection of the present invention.

Claims

1. A coal feeder falling flow sampler, characterized in that: include: A sampling device (4), wherein the sampling device (4) is reciprocated along the cross-sectional direction of the coal flow by a reciprocating drive mechanism (3), and an inner wall of one side of the sampling device (4) is arranged obliquely; A sample container (6), the sample container (6) being arranged below the sampling container (4) and located outside the coal flow in a vertical direction; The connection space between the sample container (6) and the sampling container (4) is opened and closed by a first isolation door (81), and the connection space between the sample container (6) and the outside is opened and closed by a second isolation door (82). The first isolation door (81) and the second isolation door (82) are interlocked by a linkage mechanism.

2. A coal feeder falling flow sampler according to claim 1, characterized in that: The linkage mechanism includes a conveyor belt assembly (83), wherein the front conveyor belt and the rear conveyor belt moving in opposite directions in the conveyor belt assembly (83) are respectively provided with a first connecting portion (84) and a second connecting portion (85), wherein the first connecting portion (84) is connected to the first isolation door (81), and the second connecting portion (85) is connected to the second isolation door (82).

3. A coal feeder falling flow sampler according to claim 2, characterized in that: The first isolation door (81) is fixed on the first connecting portion (84) and moves linearly to open and close the connection space between the sample container (6) and the sampling device (4). The second isolation door (82) opens and closes the connection space between the sample container (6) and the outside by rotating. The second isolation door (82) is provided with a first limiting tooth (821) at the rotation point, and also includes a first rack (86) that moves along the axis of the first limiting tooth (821). The first rack (86) tends to maintain engagement with the first rack (86) through a reset spring (87), and the movement of the second connecting portion (85) pushes the abutting first rack (86) to separate from the first limiting tooth (821).

4. A coal feeder falling flow sampler according to claim 3, characterized in that: A second limiting tooth (88) is coaxially arranged at the reel in the conveyor belt assembly (83), a guide column (822) is eccentrically arranged on one side of the first limiting tooth (821), and a second rack (89) is also included that moves in a straight line along the axis perpendicular to the second limiting tooth (88) and approaches the second limiting tooth (88), a guide block (892) is movably connected to the second rack (89) along the axis of the second limiting tooth (88), and the guide column (822) is movably engaged in a slide groove on the guide block (892).

5. A coal feeder falling flow sampler according to claim 2, characterized in that: It also includes a guide rail (5), and the sampling device (4) is provided with a guide wheel (41) that rolls on the guide rail (5).

6. A coal feeder falling flow sampler according to claim 5, characterized in that: The guide rail (5) comprises an upper guide rail (51) and a lower guide rail (52) distributed up and down, the outer diameter of the guide wheel (41) is smaller than the distance between the upper guide rail (51) and the lower guide rail (52), and a convex point (53) is provided on one side of the lower guide rail (52) close to the upper guide rail (51).

7. A coal feeder falling flow sampler according to claim 5, characterized in that: The inner cavity of the sample container (6) is divided into a plurality of mutually independent storage spaces along the axial direction of the guide wheel (41), and the sampling container (4) is connected to the guide wheel (41) via a multi-stage telescopic assembly (42).

8. A coal feeder falling flow sampler according to claim 7, characterized in that: The sampling apparatus (4) further comprises a first switch (43), a second switch (44) and a third switch (45), wherein the first switch (43) is electrically connected to the multi-stage telescopic assembly (42), and the first switch (43) is triggered when the sampling apparatus (4) moves back and forth to the initial position; the second switch (44) and the third switch (45) are located on opposite sides of the sampling apparatus (4), and are respectively used to control the two limit positions of the sampling apparatus (4) moving along the telescopic direction of the multi-stage telescopic assembly (42).

9. A coal feeder falling flow sampler according to claim 8, characterized in that: The second switch (44) and the third switch (45) are both electrically connected to the conveyor belt assembly (83).

10. A coal feeder falling flow sampler according to claim 1, characterized in that: A partition (7) is provided between the sampling device (4) and the reciprocating drive mechanism (3).

Images