A coal briquette falling strength tester

Abstract

The present invention belongs to the technical field of shaped coal detection test equipment, specifically a shaped coal falling strength tester. It includes a dust removal component and a screening and weighing component; the dust removal component includes a dustproof box, a dust monitor and a dust collector; the dustproof box is a rectangular box with a sealed door on one side, and the door frame is fixedly installed in the dustproof box; the dust monitor is fixedly installed on the dustproof box; the dust collector is connected to the dustproof box through a pipe body; the screening and weighing component includes a mounting plate, a weighing sensor, a weighing plate and a screening box; a telescopic drive is connected to the outer wall of one side of the screening box; the screening box is set below the material box; the telescopic drive and the weighing sensor are respectively connected to the control box wire. The dustproof component is provided to effectively solve the dust pollution problem during the test process, and eliminate the impact of dust pollution on the health of test personnel; the setting of the screening and weighing component solves the problem of time-consuming and labor-intensive manual screening and weighing.

Description

Technical Field

[0001] The invention belongs to the technical field of briquette detection and testing devices, in particular to a briquette falling strength tester. Background Art

[0002] When testing the falling strength of briquette: when the briquette sample falls instantly from a height of two meters, the briquette (clean briquettes) that do not meet the test requirements will be partially broken. In this process, dust will be generated due to the breaking of the briquette. In addition, the existing tester for measuring the falling strength of briquette is an open structure, and the instrument itself has no dustproof sealing device, which will cause coal dust to overflow and affect the health of the experimental operators.

[0003] Since the equipment is fully open, coal dust overflows during the experiment, polluting other equipment in the laboratory and causing dust occupational disease hazards to the test staff. It will also cause dust occupational disease hazards to the operators.

[0004] To obtain accurate and reliable data for the determination of briquette strength, a certain amount of briquette samples need to be freely dropped from a height of 2m onto a steel plate of a specified thickness; then the briquette blocks with a particle size greater than 13mm in the dropped briquette are dropped again for a total of three drops. The percentage of the mass of the briquette blocks with a particle size greater than 13mm after the third drop to the mass of the original briquette sample is used to represent the drop strength of the briquette. Internal calibration is based on the 13mm sieve.

[0005] However, the existing coal briquette drop strength tester does not have weighing and screening functions, and the weighing and screening operations after each drop are completely done manually by the test personnel. Therefore, it is time-consuming and laborious to use the existing experimental instruments to conduct coal briquette drop strength tests.

[0006] In summary, in order to solve the problems of dust pollution, harm to the health of test personnel and time-consuming and labor-intensive test process during the briquette strength drop test, it is worthwhile to improve the existing test instruments. Summary of the invention

[0007] The purpose of the present invention is to provide a briquette drop strength tester which can perform automatic weighing and screening and has a dust collection function, so as to solve the problems of dust pollution, harm to the health of test personnel and time-consuming and laborious test process when using existing testers for testing.

[0008] To achieve the above-mentioned purpose, the present invention provides a coal shape falling strength tester, including a portal frame, a control box and a material box, wherein the material box is connected to the portal frame and can slide up and down relative to the portal frame under the action of a winch, during the test, the material box slides to a position close to the top of the portal frame, and during loading, the material box slides down to a position suitable for loading, and also includes a dust removal component and a screening and weighing component; the dust removal component includes a dustproof box, a dust monitor and a dust collector; the dustproof box is a rectangular box body with a sealed door on one side, and the portal frame is fixedly installed in the dustproof box; the dust monitor is fixedly installed on the dustproof box; the dust collector is connected to the dustproof box through a pipe body; the screening and weighing component includes an installation Mounting plate, weighing sensor, weighing plate and screening box; the mounting plates are symmetrically fixedly connected on both sides of the portal frame, and the weighing sensors are respectively installed above the two mounting plates; the two ends of the weighing plate are respectively connected to the top of the weighing sensors on the corresponding sides; the weighing plate is provided with through holes; the screening box has an opening at the upper end and a bottom plate at the lower end, and the bottom plate is provided with screening holes; the screening box is slidably connected to the weighing plate and the screening box is arranged at the through holes; a telescopic drive is connected to the outer wall of one side of the screening box, and the movement direction of the telescopic drive is the same as the sliding direction of the screening box relative to the weighing plate; the screening box is arranged below the material box; the telescopic drive and the weighing sensor are respectively connected to the control box wires.

[0009] Compared with the prior art, the present invention has the following beneficial effects: the present invention effectively solves the dust pollution problem in the test process by providing a dustproof component, and eliminates the impact of dust pollution on the health of test personnel; through the setting of the screening and weighing components and under the action of the control box, the present invention realizes automatic weighing and screening functions, and solves the problem of time-consuming and labor-intensive manual screening and weighing.

[0010] The technical solution of the present invention can be further improved.

[0011] Furthermore, a lifting drive is provided on the portal frame base, and a dust collecting plate is fixedly connected to the top of the lifting drive; the lifting drive is connected to the control box wire.

[0012] Furthermore, a compensation plate is provided on the dust collection plate, and a column corresponding to the screening hole is provided on the upper end surface of the compensation plate, and the height of the column is equal to the thickness of the bottom plate of the screening box. Under the action of the lifting drive, the compensation plate completes the connection and separation with the screening box. When connected, the column is inserted into the corresponding screening hole and the upper surface of the column is aligned with the bottom surface of the screening box; when separated, a gap is formed between the column and the lower surface of the bottom plate of the screening box.

[0013] Furthermore, a mounting groove is provided on the dust collecting plate, and a plug for positioning the compensation plate is provided on the side of the mounting groove away from the sealing door; the compensation plate is inserted into the mounting groove and can be smoothly pulled out of the mounting groove.

[0014] Furthermore, the weighing plate and the screening box form a sliding connection structure through guide columns and slide seats; the guide columns are symmetrically arranged on both sides of the through hole in the weighing plate; the slide seats are symmetrically fixedly connected on both sides of the screening box, and the slide seats are respectively sleeved on the guide columns on the corresponding sides.

[0015] Furthermore, the telescopic drive is an electric push rod, and an electromagnet is provided at the head of the electric push rod. When the briquette falls and is screened, the electric push rod is adsorbed and connected to the screening box through the electromagnet; after the screening is completed, the electromagnet is powered off, and the electric push rod is disconnected from the screening box.

[0016] Furthermore, the tube body used to connect the vacuum cleaner and the dustproof box is a flexible tube; the vacuum cleaner is a box-type vacuum cleaner. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view and a cross-sectional view of an embodiment of the present invention.

[0018] Figure 2 It is a stereoscopic diagram of a dust removal assembly according to an embodiment of the present invention.

[0019] Figure 3 It is a three-dimensional diagram of the main structure of an embodiment of the present invention.

[0020] Figure 4 It is a top view of the main structure of the embodiment of the present invention.

[0021] Figure 5 It is a connection diagram and a partial cross-sectional view showing a screening and weighing assembly according to an embodiment of the present invention.

[0022] Figure 6 It is a schematic structural diagram of a dust collecting tray according to an embodiment of the present invention.

[0023] In the figure: door frame 1; base 2; material box 3; control box 4; fixed pulley 5; rope splitter 6; winch 7; dust removal component 8; dustproof box 8-1; sealing door 8-1-1; dust monitor 8-2; tube body 8-3; dust collector 8-4; mounting plate 9; weighing sensor 10; weighing plate 11; through hole 11-1; screening box 12; screening hole 12-1; dust collecting plate 13; compensation plate 14; column 14-1; lifting drive 15; guide column 16; slide seat 17; electromagnet 18; telescopic drive 19; support frame 20. DETAILED DESCRIPTION

[0024] The present invention will be described in detail below in combination with the prior art, drawings and embodiments.

[0025] First, let's introduce the related prior art. The coal-bearing falling strength tester in the prior art mainly consists of a portal frame 1, a control box 4 and a material box 3, etc. The two ends of the material box 3 are slidably connected to the portal frame 1, two fixed pulleys 5 are arranged at the top of the portal frame 1, and a rope splitter 6 is fixed at the upper end of a column on one side of the portal frame 1, and a small winch 7 is arranged at the lower end near the column on the side, and a steel wire rope is arranged on the winch 7, the upper end of the steel wire rope is connected to one end of the buckle, and two steel wire ropes are connected to the other end of the buckle, and the two steel wire ropes are respectively bypassed by the rope splitter 6, which are installed on the top of the portal frame 1 and are arranged on the left and right sides of the material box 3. After bypassing the fixed pulley 5, the steel wire rope goes vertically downward and is fixedly connected to the connecting frames on both sides of the material box 3. The material box 3 can slide up and down relative to the portal frame 1 under the action of the winch 7. During the test, the material box 3 slides to the position close to the top of the portal frame 1, and when loading, the material box 3 slides down to a position suitable for loading. The bottom end of the door frame 1 is fixed on the base 2, and the small hoist 7 is also installed on the base 2, and a control box 4 is provided on the base 2. By operating the corresponding button, the material box 3 can be raised or lowered correspondingly with the action of the hoist 7 under the action of the control box 4; and the bottom of the material box 3 can be opened by pressing the corresponding button in the control box 4 to complete the falling of the briquette.

[0026] Compared with the prior art, the innovation of the present invention is mainly that a dust removal component 8 is added on the basis of the prior art, and at the same time, a screening and weighing component is arranged at the bottom of the door frame 1.

[0027] The coal briquette falling strength tester provided by the present invention also includes a dust removal component 8 and a screening and weighing component.

[0028] The dust removal assembly 8 includes a dust box 8-1, a dust monitor 8-2 and a dust collector 8-4; the dust box 8-1 is a rectangular box with a sealing door 8-1-1 on one side, and the door frame 1 is fixedly installed in the dust box 8-1; the dust monitor 8-2 is fixedly installed on the dust box 8-1; the dust collector 8-4 is connected to the dust box 8-1 through a pipe body 8-3. The dust prevention assembly effectively solves the dust pollution problem during the test process and eliminates the impact of dust pollution on the health of test personnel.

[0029] The screening and weighing assembly includes a mounting plate 9, a weighing sensor 10, a weighing plate 11 and a screening box 12; the mounting plates 9 are symmetrically fixedly connected on both sides of the door frame 1, and the weighing sensors 10 are respectively installed above the two mounting plates 9; the two ends of the weighing plate 11 are respectively connected to the top of the weighing sensor 10 on the corresponding side; and a through hole 11-1 is provided on the weighing plate 11. The screening box 12 is open at the upper end, and is provided with a bottom plate at the lower end, and a screening hole 12-1 is provided on the bottom plate; the screening box 12 is slidably connected to the weighing plate 11 and the screening box 12 is arranged at the through hole 11-1, and the lower surface of the bottom plate of the screening box 12 is located below the weighing plate 11; a telescopic drive 19 is connected to the outer wall of one side of the screening box 12, and the telescopic drive 19 is fixedly mounted on a support frame 20, and the support frame 20 is fixed on the bottom plate, and the movement direction of the telescopic drive 19 is the same as the sliding direction of the screening box 12 relative to the weighing plate 11; the screening box 12 is arranged below the material box 3; the telescopic drive 19 and the weighing sensor 10 are respectively connected to the control box 4 by wire. Through the setting of the screening and weighing components and under the action of the control box 4, the present invention realizes the automatic weighing and screening functions, and solves the problem of time-consuming and labor-intensive manual screening and weighing.

[0030] The following describes a preferred structure that can be used when implementing the present invention.

[0031] As a preferred structure, a lifting drive 15 is provided on the base 2 of the portal frame 1, and a dust collecting plate 13 is fixedly connected to the top of the lifting drive 15; the lifting drive 15 is connected to the control box 4 by wires. The dust collecting plate 13 is arranged directly below the screening and weighing assembly and is arranged parallel to the weighing plate 11. Each side of the dust collecting plate 13 is wider than the weighing plate 11.

[0032] The dust collecting tray 13 is arranged below the screening and weighing assembly to collect the unqualified coal pieces or coal powder that are screened out after the coal pieces fall down, thus facilitating the collection of the screened coal pieces and coal powder.

[0033] As a preferred structure, a compensation plate 14 is provided on the dust collecting plate 13, and a column 14-1 corresponding to the screening hole 12-1 is provided on the upper end surface of the compensation plate 14, and the height of the column 14-1 is equal to the thickness of the bottom plate of the screening box 12. Under the action of the lifting drive 15, the compensation plate 14 completes the connection and separation with the screening box 12. When connected, the column 14-1 is inserted into the corresponding screening hole 12-1 and the upper surface of the column 14-1 is aligned with the bottom surface of the screening box 12 (i.e., the upper surface of the bottom plate of the screening box 12); when separated, the column 14-1 forms a gap with the lower surface of the bottom plate of the screening box 12, so that the screening box 12 completes the screening action in the through hole 11-1 of the weighing plate 11 under the action of the telescopic movement.

[0034] A compensation plate 14 is arranged on the dust collecting tray 13. Under the action of the lifting drive 15, the main body arranged on the compensation plate 14 is inserted into the corresponding screening hole 12-1, that is, the bottom plate of the screening box 12 is compensated to be a "hole-free flat plate", eliminating the influence of the screen holes on the falling and breaking of the briquette, so that the test results maintain the original accuracy.

[0035] As a preferred structure, a mounting groove is provided on the dust collecting tray 13, and a plug for positioning the compensation plate 14 is provided on the side of the mounting groove away from the sealing door 8-1-1; the compensation plate 14 is inserted into the mounting groove and can be smoothly pulled out of the mounting groove.

[0036] The compensation plate 14 is set to be independent from the dust collecting tray 13 and is a detachable plug-in structure with the dust collecting tray 13, which facilitates the removal of crushed coal and coal powder from the dust collecting tray 13.

[0037] As a preferred structure, the weighing plate 11 and the screening box 12 form a sliding connection structure through the guide column 16 and the slide 17; the guide column 16 is symmetrically arranged on both sides of the through hole 11-1 on the weighing plate 11; the slide 17 is symmetrically fixedly connected on both sides of the screening box 12, and the slide 17 is respectively sleeved on the guide column 16 on the corresponding side. The guide column 16 is fixedly installed on the weighing plate 11 through a support bearing.

[0038] As a preferred structure, the telescopic drive 19 is set as an electric push rod, and the head of the electric push rod is provided with an electromagnet 18. When the briquette falls and is screened, the electric push rod is adsorbed and connected to the screening box 12 through the electromagnet 18; after the screening is completed, the electromagnet 18 is powered off, and the electric push rod is disconnected from the screening box 12.

[0039] The telescopic drive 19 uses an electric push rod to simplify the complexity of the control system or program; the electromagnet 18 is used so that the telescopic drive 19 can be separated from the screening box 12 after the screening is completed, thereby eliminating the influence of the telescopic drive 19 on the weighing sensor 10 caused by the connection between the telescopic drive 19 and the screening box 12, thereby ensuring the accuracy of the weighing.

[0040] As a preferred structure, the tube body 8-3 used to connect the vacuum cleaner 8-4 and the dustproof box 8-1 is a flexible tube; the vacuum cleaner 8-4 is a box-type vacuum cleaner.

[0041] A flexible tube (such as an adjustable bellows, etc.) is used as the tube body 8-3 connecting the vacuum cleaner 8-4 and the dustproof box 8-1, so that the overall layout of the instrument is flexible and variable, and the overall layout of the instrument can be reasonably adjusted in the laboratory according to the layout conditions inside the laboratory.

[0042] In summary, compared with the prior art, the present invention has the following advantages: (i) a dustproof component is added to effectively solve the dust problem during the briquette falling test; by arranging a dust collector 8-4 connected to the dustproof box 8-1 in the dustproof component, the dust in the dustproof box 8-1 can be quickly collected in a short time, thereby reducing the operation waiting time; installing a dust monitor 8-2 on the dustproof box 8-1 can intuitively monitor the dust concentration in the equipment box and grasp the door opening time in real time and effectively; (ii) a screening and weighing component is arranged at the bottom of the door frame 1, and the screening box 12 and the telescopic drive 19 are arranged to replace the manual screening of the test samples, so that the screening process is clean and hygienic, and the work efficiency is improved; by arranging the weighing plate 11 and the weighing sensor 10, the manual weighing of the test samples is eliminated, thereby effectively saving the operation time.

[0043] Please refer to the attached Figures 1 to 6 As shown, a preferred embodiment of the present invention is introduced.

[0044] This preferred embodiment adds a dust removal component 8 on the basis of the existing technology, places the door frame 1 in the dustproof box 8-1, and the dustproof box 8-1 is connected to the portable box-type dust collector 8-4 through a bellows, and a dust monitor 8-2 for monitoring the dust concentration in the dustproof box 8-1 is installed on the dustproof box 8-1; and a lifting drive 15 is installed on the base 2 of the door frame 1, and a dust collection plate 13 is arranged above the lifting drive 15, and a mounting groove is arranged on the dust collection plate 13, and a compensation plate 14 is inserted in the mounting groove, and a column 14-1 for cooperating with the screening hole 12-1 is arranged on the compensation plate 14. The installation method, lifting and opening control method of the material box 3 are the same as the scheme adopted in the existing technology, and will not be repeated.

[0045] A screening and weighing assembly is arranged above the supplementary plate, and the screening and weighing assembly is provided with a case plate, a weighing sensor 10, a weighing plate 11, a screening box 12, a guide column 16, a slide 17 and a support bearing. Two mounting plates 9 are symmetrically welded on the columns on both sides of the portal frame 1, and weighing sensors 10 are respectively arranged on the mounting plates 9, and a weighing plate 11 is installed on the weighing sensor 10; a through hole 11-1 for screening is arranged on the weighing plate 11, and two mutually symmetrical guide columns 16 are respectively arranged on the two sides of the through hole 11-1 corresponding to the columns of the portal frame 1, and the guide columns 16 are installed on the weighing plate 11 through support bearings. A slide 17 is arranged on the guide column 16, and the slide 17 is symmetrically fixedly connected to both sides of the screening box 12; a support frame 20 is arranged on the bottom plate directly opposite and away from the sealing door 8-1-1, and an electric push rod is arranged on the support frame 20, and an electromagnet 18 is installed on the electric push rod.

[0046] The control system of this embodiment is integrated in the control box 4, which is mainly provided with a reset button, a start button, a display screen and a control circuit, etc. The display screen is used to display the values ​​collected by the dust detector and the weighing sensor 10. The lifting drive 15, the electric push rod, the weighing sensor 10 (a gravity weighing sensor 10 is used in this embodiment) and the dust monitor 8-2 of this embodiment are all connected to the control box 4, and realize the corresponding functions under the action of the control circuit.

[0047] The method for conducting a briquette drop strength test using an embodiment of the present invention is as follows.

[0048] Step one, press the reset button in the control box 4 to put all parts of the embodiment of the present invention into a reset state; in the reset state, the material box 3 is at the feeding height, the electromagnet 18 is energized and the telescopic drive 19 is connected to the screening box 12, and the screening box 12 is directly below the material box 3; at this time, under the action of the lifting drive 15, the dust collection plate 13 is connected to the bottom of the screening box 12, that is, the column 14-1 on the compensation plate 14 is inserted into the corresponding screening hole 12-1.

[0049] Step 2, open the sealed door 8-1-1, put the prepared clean coal balls in the material box 3, and close the sealed door 8-1-1; press the start button, the material box 3 rises to the specified drop height (the drop height is generally the distance from the bottom of the material box 3 to 2m above the bottom plate of the screening box 12).

[0050] Step three, after the material box 3 rises to the specified drop height, the bottom of the material box 3 automatically opens, and at the same time the vacuum cleaner 8 - 4 is started, and the coal balls fall from the material box 3 into the screening box 12 .

[0051] Step four, after the coal balls fall into the screening box 12, the lifting drive 15 drives the dust collecting plate 13 and the compensation plate 14 to descend until the column of the compensation plate 14 is completely separated from the screening hole 12-1; the telescopic drive 19 starts and drives the screening box 12 to screen in the through hole 11-1 of the weighing plate 11 (i.e., reciprocating linear motion). After the screening continues for a preset time, the screening movement stops and the screening box 12 is reset. At this time, the electromagnet 18 is powered off and the telescopic drive 19 is separated from the screening box 12.

[0052] Step five, after the above actions are completed, the vacuum cleaner 8-4 remains running until the dust concentration value on the display screen of the dust monitor 8-2 returns to normal, then the vacuum cleaner 8-4 stops running and records the value of the weighing sensor 10 on the display screen of the control box 4 at this time (that is, the coal blocks in the screening box 12 that meet the requirements); open the sealed door 8-1-1, and take out the coal blocks in the screening box 12 and the broken coal blocks and coal powder on the dust collection tray 13 respectively; use the broken coal blocks taken out as experimental objects, and repeat steps one to five.

[0053] Step 6: Repeat steps 1 to 5 for a specified number of times (generally not less than 3 times), and the test is completed after the corresponding values ​​are calculated according to the specified algorithm.

[0054] In this document, the "coal" mentioned refers to clean coal briquettes.

[0055] The present invention is further described above with the aid of specific embodiments. However, it should be understood that the specific description here should not be construed as limiting the essence and scope of the present invention. Various modifications made to the above embodiments by ordinary technicians in the field after reading this specification are all within the scope of protection of the present invention.

Claims

1. A coal briquette drop strength tester, comprising a gantry, a control box and a material box, wherein the material box is connected to the gantry and can slide up and down relative to the gantry under the action of a winch, the material box slides to a position close to the top of the gantry during testing, and slides down to a position suitable for loading during loading; it also comprises a dust removal component and a screening and weighing component; The dust removal assembly includes a dustproof box, a dust monitor and a dust collector; the dustproof box is a rectangular box with a sealed door on one side, and the door frame is fixedly installed in the dustproof box; the dust monitor is fixedly installed on the dustproof box; the dust collector is connected to the dustproof box through a pipe body; The screening weighing assembly comprises a mounting plate, a weighing sensor, a weighing plate and a screening box; the mounting plates are symmetrically fixedly connected on both sides of the door frame, and the weighing sensors are respectively installed above the two mounting plates; the two ends of the weighing plate are respectively connected to the top of the weighing sensors on the corresponding sides; and a through hole is provided on the weighing plate; The screening box has an opening at the upper end and a bottom plate at the lower end, and the bottom plate has screening holes; the screening box is slidably connected to the weighing plate and the screening box is arranged at the through hole; a telescopic drive is connected to the outer wall of one side of the screening box, and the movement direction of the telescopic drive is the same as the sliding direction of the screening box relative to the weighing plate; the screening box is arranged below the material box; the telescopic drive and the weighing sensor are respectively connected to the control box wires; A lifting drive is provided on the bottom plate of the portal frame, and a dust collecting plate is fixedly connected to the top of the lifting drive; the lifting drive is connected to the control box wire; Features: The dust collecting plate is provided with a compensation plate, the upper end surface of the compensation plate is provided with a column corresponding to the screening hole, and the height of the column is equal to the thickness of the bottom plate of the screening box; A mounting groove is arranged on the dust collecting plate, and a plug for positioning the compensation plate is arranged on the side of the mounting groove away from the sealing door; the compensation plate is inserted into the mounting groove and can be smoothly drawn out from the mounting groove.

2. The coal briquette drop strength tester according to claim 1, characterized in that: The weighing plate and the screening box form a sliding connection structure through guide pillars and slide seats; the guide pillars are symmetrically arranged on both sides of the through hole on the weighing plate; the slide seats are symmetrically fixedly connected on both sides of the screening box, and the slide seats are respectively sleeved on the guide pillars on the corresponding sides.

3. The coal briquette drop strength tester according to claim 1, characterized in that: The telescopic drive is provided as an electric push rod, and the head of the electric push rod is provided with an electromagnet.

4. The coal briquette drop strength tester according to claim 1, characterized in that: The pipe body used to connect the vacuum cleaner and the dustproof box is a flexible pipe; the vacuum cleaner is a box-type vacuum cleaner.

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