Coal crusher

Abstract

The coal crusher comprises a hollow crushing shell provided with a crushing cavity, a feeding opening is formed in the upper surface of the crushing shell, a base is arranged below the crushing shell, a receding cavity is formed in the position, corresponding to the crushing cavity, in the base, and a crushing mechanism is rotationally connected between the receding cavity and the crushing cavity; the crushing mechanism comprises a rotating shaft rotationally connected with the base, a crushing hammer is fixedly arranged at the position, corresponding to the receding cavity, of the rotating shaft, one end of the rotating shaft is connected with a power assembly, and a first scraping and sweeping plate and a second scraping and sweeping plate are rotationally connected to the two inner walls, parallel to the rotating shaft of the crushing mechanism, in the crushing shell. The crushing shell is provided with a first power piece and a second power piece which are used for controlling the first scraping and sweeping plate to rotate and controlling the second scraping and sweeping plate to rotate correspondingly. By arranging the first scraping and sweeping plate and the second scraping and sweeping plate, coal samples and Xinning adhered to the inner wall of the crushing shell can be cleaned, and the probability of blockage caused by adhesion and accumulation of the coal samples at the sieve plates is reduced through the anti-blocking sieve plate group.

Description

Technical Field

[0001] The invention relates to the technical field of coal sample preparation, in particular to a coal crusher. Background Art

[0002] In the commercial coal trade, both parties need to sample, prepare and test the coal, and settle the trade according to the test results. Coal sampling is to prepare a large number of large-particle samples into analytical test coal samples with smaller mass and smaller particle size without bias, and the error introduced by sample preparation is 16%. For port commercial coal sampling, coal with a nominal maximum particle size of 50mm is generally prepared into 13mm full moisture coal samples, 3mm storage coal samples and 0.2mm general analytical test coal samples. Coal sample crusher is a crushing device that reduces the sample mass and increases the number of sample particles during the coal sample preparation process.

[0003] Problems: In the process of preparing samples, the traditional coal crushing device is affected by the moisture and cohesiveness of the coal. The coal samples are very likely to adhere to the inner wall of the crushing device and the screen plate, thereby blocking the crushing device. At the same time, the adhered coal samples are likely to cause pollution to the subsequent preparation of coal samples, greatly affecting the efficiency and accuracy of sample preparation. The above problems are more likely to occur when preparing medium-moisture coal and above. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To achieve the above-mentioned purpose, the present invention proposes a coal crusher, comprising a crushing shell with a crushing cavity provided in the hollow part, a feed port provided on the upper surface of the crushing shell, a base provided under the crushing shell, a yield cavity provided in the base corresponding to the crushing cavity, a crushing mechanism rotatably connected between the yield cavity and the crushing cavity, the crushing mechanism comprising a rotating shaft rotatably connected to the base, a crushing hammer fixedly provided at a position of the rotating shaft corresponding to the yield cavity, a power assembly connected to one end of the rotating shaft, a first scraping plate and a second scraping plate rotatably connected on two inner walls of the crushing shell parallel to the rotating shaft of the crushing mechanism, and a first power member and a second power member for respectively controlling the rotation of the first scraping plate and the second scraping plate are provided on the crushing shell.

[0006] The present application can clean the coal samples and Xining adhered to the inner wall of the crushing shell by setting up the first scraping plate and the second scraping plate, and reduce the probability of blockage caused by the adhesion and accumulation of coal samples on the screen plate through the anti-blocking screen plate group.

[0007] Optionally, the crushing shell includes a top wall for feeding and a bottom frame fixed to the base, a rear side wall and a front fixing plate are fixedly connected between the top wall and the bottom frame, the area of ​​the front fixing plate is smaller than the rear side wall, and the rear side wall and the front fixing plate are arranged perpendicular to the rotation center of the crushing mechanism, two L-shaped door panels are buckled perpendicular to the rear side wall and the top wall, the door panels are hinged to the rear side walls, and the door panels include scraping sections and locking sections perpendicular to each other, the first scraping plate and the second scraping plate are respectively arranged on the inner walls of the scraping sections of the two door panels, and the locking sections of the two door panels form a front stop door parallel to the rear side wall when buckled.

[0008] Furthermore, the first power member is configured as a first motor disposed on the outer wall of the scraping section of the door panel corresponding to the first scraping plate, and the output end of the first motor passes through the crushing shell and is fixedly connected to the rotation center of the first scraping plate.

[0009] Furthermore, the second power member is configured as a second motor disposed on the outer wall of the scraping section of the door panel corresponding to the second scraping plate, and the output end of the second motor passes through the crushing shell and is fixedly connected to the rotation center of the second scraping plate.

[0010] Furthermore, locking ears are arranged at relative positions of the locking sections of the two door panels, a locking hole is arranged on each locking ear, and the two locking holes are arranged opposite to each other.

[0011] Furthermore, handles are provided on the locking sections of the two door panels.

[0012] Furthermore, the power assembly includes a third motor arranged at one end of the crushing shell corresponding to the rotating shaft, the output shaft of the third motor is connected to a reducer, and the reducer is arranged in driving connection with the rotating shaft.

[0013] Furthermore, bearing platforms are arranged on the base at positions corresponding to both ends of the rotating shaft, and a bearing assembly is fixedly arranged on each bearing platform to cooperate with the rotating shaft, and the rotating shaft is rotatably connected to the bearing assembly.

[0014] Furthermore, the anti-blocking sieve plate group includes a first sieve plate and a second sieve plate which are overlapped with each other, the first sieve plate is provided with a first sieve hole, the second sieve plate is provided with a second sieve hole, and the aperture of the first sieve hole is smaller than the aperture of the second sieve hole.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0017] Figure 1 A schematic diagram of the overall structure of a coal crusher according to the present invention;

[0018] Figure 2 is a schematic diagram of the internal structure of a coal crusher according to the present invention;

[0019] Figure 3 It is a schematic structural diagram of an anti-blocking screen plate group of a coal crusher according to the present invention.

[0020] Description of reference numerals:

[0021] 1. Crushing shell; 2. Base; 3. First motor; 4. Second motor; 5. Third motor; 6. Reducer; 7. Rotating shaft; 8. Crushing hammer head; 9. First scraping plate; 10. Second scraping plate; 11. Anti-blocking screen plate group; 111. First screen hole; 112. First screen plate; 113. Second screen hole; 114. Second screen plate. DETAILED DESCRIPTION

[0022] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0023] The present application provides a coal crusher, as shown below Figures 1 to 3 Elaborate in detail.

[0024] A coal crusher comprises a crushing shell 1 which is hollow and has a crushing chamber, a feed port is arranged on the upper surface of the crushing shell 1, a base 2 is arranged below the crushing shell 1, a yield chamber is arranged in the base 2 corresponding to the crushing chamber, a crushing mechanism is rotatably connected between the yield chamber and the crushing chamber, a discharge port is arranged below the yield chamber, a first scraping plate 9 and a second scraping plate 10 are rotatably connected on two inner walls of the crushing shell 1 which are parallel to the rotating axis of the crushing mechanism, a first power member and a second power member for respectively controlling the rotation of the first scraping plate 9 and the second scraping plate 10 are arranged on the crushing shell 1, and an anti-blocking screen plate group 11 is arranged in the yield chamber corresponding to the crushing mechanism below.

[0025] The crushing shell 1 is fixedly connected to the base 2. When crushing the coal body, the coal sample is put into the crushing shell 1 from the feed port. After entering the crushing shell 1, the coal body falls into the crushing mechanism under the action of gravity. After being crushed by the crushing mechanism, it enters the clearance cavity in the base 2 and is finally discharged from the discharge port. If the crushed coal sample adheres to the inner wall of the crushing cavity, the first scraping plate 9 and the second scraping plate 10 will scrape the adhered coal body from the inner wall of the crushing mechanism, and make the adhered coal sample enter the crushing mechanism again, so that the crushing mechanism can perform secondary crushing on the adhered coal sample and discharge it from the discharge port.

[0026] The present application can clean the coal samples and the coal dust adhering to the inner wall of the crushing shell 1 by setting the first scraping plate 9 and the second scraping plate 10, and reduce the probability of blockage caused by the adhesion and accumulation of coal samples on the screen plate by the anti-blocking screen plate group 11.

[0027] Considering that during the coal sample crushing process, the first scraper plate 9, the second scraper plate 10 and the crushing mechanism and other internal components involved in the crushing may be worn and need to be replaced in time, it is necessary to expose the first scraper plate 9, the second scraper plate 10 and the crushing mechanism to the external environment to facilitate maintenance and replacement by the staff.

[0028] Therefore, in some embodiments, the crushing shell 1 includes a top wall for feeding and a bottom frame fixed to the base 2, and a rear side wall and a front fixed plate are fixedly connected between the top wall and the bottom frame. The area of ​​the front fixed plate is smaller than that of the rear side wall. The front fixed plate and the rear side wall can ensure that the top wall and the bottom frame are stably connected, and the rear side wall and the front fixed plate are arranged perpendicular to the rotation center of the crushing mechanism, and two L-shaped door panels are buckled perpendicular to the rear side wall and the top wall. The door panels are hinged to the rear side walls, and the door panels include scraping sections and locking sections that are perpendicular to each other. The first scraping plate 9 and the second scraping plate 10 are respectively arranged on the inner walls of the scraping sections of the two door panels, and the locking sections of the two door panels form a front baffle parallel to the rear side wall when buckled, and the front fixed plate is located between the front baffle and the rear side wall. The front fixed plate can prevent the two door panels from excessive angular displacement, which will cause the internal crushing space of the crushing shell 1 to be occupied.

[0029] When the staff needs to clean the inside of the crushing shell 1 or maintain the first scraper plate 9, the second scraper plate 10 and the crushing mechanism, the staff can open the two door panels to expose the internal structure of the crushing shell 1 to the external environment, which is convenient for the staff to clean or maintain. In addition, an observation hole is opened on the front fixing plate for observing the crushing mechanism from more angles.

[0030] In some embodiments, the first power member is configured as a first motor 3 provided on the outer wall of the scraping section of the door panel corresponding to the first scraping plate 9, and the output end of the first motor 3 passes through the crushing shell 1 and is fixedly connected to the rotation center of the first scraping plate 9. A first recessed groove for accommodating the first motor 3 is provided on the outer wall of the scraping section to ensure that most of the first motor 3 is in the first recessed groove, reducing the volume of the first motor 3 protruding outside the protective shell, thereby reducing the contact between external factors and the first motor 3, and protecting the first motor 3 and nearby staff.

[0031] In some embodiments, the second power member is configured as a second motor 4 provided on the outer wall of the scraping section of the door panel corresponding to the second scraping plate 10, and the output end of the second motor 4 passes through the crushing shell 1 and is fixedly connected to the rotation center of the second scraping plate 10. A second recessed groove for accommodating the second motor 4 is provided on the outer wall of the scraping section to ensure that most of the second motor 4 is in the second recessed groove, reducing the volume of the second motor 4 protruding outside the protective shell, thereby reducing the contact between external factors and the second motor 4, and protecting the second motor 4 and nearby staff.

[0032] In some embodiments, in order to fix the two door panels, locking ears are provided at the relative positions of the locking sections of the two door panels, each locking ear is provided with a locking hole, and the two locking holes are arranged opposite to each other. The two door panels can be fixed by inserting a door lock or simply inserting a stick between the two locking holes.

[0033] In other embodiments, in order to facilitate the opening and closing control of the two door panels, handles are provided on the locking sections of the two door panels.

[0034] In some embodiments, an anti-blocking screen plate group 11 is arranged below the corresponding crushing mechanism in the give way cavity, and the anti-blocking screen plate group 11 includes a first screen plate 112 and a second screen plate 114 which are overlapped with each other. The first screen plate 112 and the second screen plate 114 are both arranged in a C shape, and the first screen plate 112 is provided with a first sieve hole 111, and the second sieve plate 114 is provided with a second sieve hole 113. The first sieve hole 111 and the second sieve hole 113 are both arranged as waist-shaped holes, and the aperture of the first sieve hole 111 is smaller than the aperture of the second sieve hole 113.

[0035] Compared with the sieve plate used in the crusher of the prior art, the overall thickness of the first sieve plate 112 and the second sieve plate 114 is less than or equal to the thickness of the sieve plate in the prior art, that is, the thickness of the first sieve plate 112 is less than the thickness of the sieve plate in the prior art. On the premise that the aperture of the first sieve hole 111 is smaller than the aperture of the second sieve hole 113, the crushed coal sample will be discharged directly from the discharge port after passing through the first sieve hole 111. The distance that the coal sample passes through the first sieve plate 112 is the thickness of the first sieve plate 112. The distance that the coal sample passes through the first sieve plate 112 is much smaller than the distance that passes through the sieve plate in the prior art, that is, the contact area between the coal sample and the sieve hole wall is reduced, thereby reducing the possibility of the coal sample sticking to the sieve hole wall, and further reducing the possibility of the coal sample clogging the sieve hole.

[0036] At the same time, by stacking the first sieve plate 112 and the second sieve plate 114 up and down and aligning the centers of the first sieve plate 112 and the second sieve plate 114, the overall strength of the anti-blocking sieve plate group 11 can be ensured, and the situation where the first sieve plate 112 is thin and causes the first sieve plate 112 to break can be avoided. In addition, the aperture of the second sieve hole 113 is larger than the first sieve hole 111, which can ensure the technical effect of reducing the contact distance between the coal sample and the sieve plate.

[0037] In some embodiments, the crushing mechanism includes a rotating shaft 7 rotatably connected to the base 2, a breaker hammer is fixedly arranged at the position of the rotating shaft 7 corresponding to the yield cavity, one end of the rotating shaft 7 is connected to a power assembly, and the power assembly includes a third motor 5 arranged at one end of the crushing shell 1 corresponding to the rotating shaft 7, and the output shaft of the third motor 5 is connected to a reducer 6, and the reducer 6 is arranged in transmission connection with the rotating shaft 7. The third motor 5 drives the reducer 6 to convert the speed into the speed required by the breaker hammer, thereby transmitting the power to the rotating shaft 7, and the rotating shaft 7 drives the breaker hammer to crush the coal body.

[0038] In some embodiments, in order to provide further fixed support for the rotating shaft 7 and reduce rotational friction, a bearing platform is provided on the base 2 corresponding to the two ends of the rotating shaft 7, and a bearing assembly is fixedly provided on each bearing platform to cooperate with the rotating shaft 7, and the rotating shaft 7 is rotatably connected to the bearing assembly.

[0039] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0040] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0041] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A coal crusher, characterized in that: The invention comprises a crushing shell with a crushing cavity provided in the hollow part, a feed port provided on the upper surface of the crushing shell, a base provided under the crushing shell, a yield cavity provided in the base corresponding to the crushing cavity, a crushing mechanism rotatably connected between the yield cavity and the crushing cavity, the crushing mechanism comprises a rotating shaft rotatably connected to the base, a crushing hammer is fixedly provided at a position of the rotating shaft corresponding to the yield cavity, a power assembly is connected to one end of the rotating shaft, a first scraping plate and a second scraping plate are rotatably connected on two inner walls of the crushing shell parallel to the rotating shaft of the crushing mechanism, and a first power member and a second power member for respectively controlling the rotation of the first scraping plate and the second scraping plate are provided on the crushing shell.

2. A coal crusher according to claim 1, characterized in that: The crushing shell includes a top wall for feeding and a bottom frame fixed to a base, a rear side wall and a front fixing plate are fixedly connected between the top wall and the bottom frame, the front fixing plate has an area smaller than the rear side wall, and the rear side wall and the front fixing plate are perpendicular to the rotation center of the crushing mechanism, two L-shaped door panels are buckled perpendicular to the rear side wall and the top wall, the door panels are hinged to the rear side wall, and the door panels include scraping sections and locking sections perpendicular to each other, the first scraping plate and the second scraping plate are respectively arranged on the inner walls of the scraping sections of the two door panels, and the locking sections of the two door panels form a front stop door parallel to the rear side wall when buckled.

3. A coal crusher according to claim 2, characterized in that: The first power member is configured as a first motor disposed on the outer wall of the scraping section of the door panel corresponding to the first scraping plate, and the output end of the first motor passes through the crushing shell and is fixedly connected to the rotation center of the first scraping plate.

4. A coal crusher according to claim 2, characterized in that: The second power member is configured as a second motor disposed on the outer wall of the scraping section of the door panel corresponding to the second scraping plate, and the output end of the second motor passes through the crushing shell and is fixedly connected to the rotation center of the second scraping plate.

5. A coal crusher according to claim 2, characterized in that: Locking ears are arranged at relative positions of the locking sections of the two door panels, each locking ear is arranged with a locking hole, and the two locking holes are arranged opposite to each other.

6. A coal crusher according to claim 2, characterized in that: The locking sections of the two door panels are both provided with handles.

7. A coal crusher according to claim 1, characterized in that: The power assembly includes a third motor arranged at one end of the crushing shell corresponding to the rotating shaft, the output shaft of the third motor is connected with a reducer, and the reducer is arranged in driving connection with the rotating shaft.

8. A coal crusher according to claim 7, characterized in that: The base is provided with bearing platforms at positions corresponding to both ends of the rotating shaft, and a bearing assembly is fixedly provided on each bearing platform to cooperate with the rotating shaft, and the rotating shaft is rotatably connected to the bearing assembly.

9. A coal crusher according to claim 1, characterized in that: An anti-blocking screen plate group is arranged below the crushing mechanism in the give way cavity, and the anti-blocking screen plate group includes a first screen plate and a second screen plate which are overlapped up and down. The first screen plate is provided with a first screen hole, and the second screen plate is provided with a second screen hole. The aperture of the first screen hole is smaller than the aperture of the second screen hole.

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