Rake hammer mill

Abstract

A hammer pulverizer mainly comprises a feed inlet (1), a hammer (2), a rotor (3), a screen (9), a discharge port (7), a body (8), and a motor (6). The pulverizer is characterized in that a variable frequency belt conveyor (11) is provided on the feed inlet (1) of the pulverizer, a pressure roller (12) whose pressure is adjusted by a spring, a paper sheet guiding passage (13), two fixed hammers (14) at the lower outlet of the paper sheet guiding passage (13), the fixed hammers (14) having right-angled blades, connected to the waist holes at the lower outlet of the paper sheet guiding passage (13) by bolts, and the distance between the fixed hammers (14) and the hammer (2) is adjusted by the waist holes, the hammer (2) is a rake-type hammer, and the rake-type hammer pulverizer according to the above structure can crush raw pulp paper into uniform small pieces, with fluffy edges and no hard marks, and can solve the problem of uniform crushing of tailings.

Description

Technical Field

[0001] The invention relates to a pulverizing device used in papermaking, textile, medical, feed, food and other industries, in particular to a rake-type hammer pulverizer. Background Art

[0002] Usually, a hammer mill is composed of a feed port, a machine body, a rotor, a hammer, a screen, a motor, a discharge port, etc. When working, the motor drives the rotor to make the hammers on the rotor rotate. After the material enters, it is continuously crushed by the hammers. The material with qualified particle diameter passes through the sieve holes of the screen and is discharged from the discharge port of the mill.

[0003] The existing hammer mill has the following problems:

[0004] 1. After the raw pulp paper sheets enter the hammer mill, they are continuously crushed into pieces of varying sizes by the hammers. The particle size distribution of the products after the hammer crushing is random, and it is impossible to obtain uniform sheet products one by one.

[0005] 2. The tail of the original pulp paper is short, and the feeding roller cannot hold it down, so large pieces will suddenly enter the crusher, making the product more uneven.

[0006] 3. Although the screen of the hammer mill has a certain screening ability, the paper pieces are thin and large pieces of material are easily stuck to the surface of the screen and cannot be touched by the hammers. They cannot pass through the screen holes and will cause fire, so the machine can only be forced to stop for cleaning.

[0007] The special requirement for crushing raw pulp paper is to crush the raw pulp paper into uniform small pieces with fluffy edges and no hard marks. Especially when the tail of raw pulp paper is short and cannot be controlled, the whole tail will suddenly fall into the crusher or get stuck at the feed port, resulting in uneven products. After checking all technical information, no such crusher was found, nor was there a case with the same invention purpose. Summary of the invention

[0008] The invention aims to provide a rake-type hammer pulverizer, which can crush raw pulp paper sheets into uniform small pieces with fluffy edges and no hard marks, and can solve the problem of uniform crushing of tailings.

[0009] The object of the present invention is achieved by the following technical scheme: a hammer pulverizer, mainly comprising a feed inlet (1), a hammer (2), a rotor (3), a screen (9), a discharge port (7), a body (8), and a motor (6), characterized in that a variable frequency belt conveyor (11) is provided on the feed inlet (1) of the pulverizer, a pressure roller (12) whose pressure is adjusted by a spring, a paper sheet guiding channel (13), two fixed hammers (14) at the lower outlet of the paper sheet guiding channel (13), the fixed hammers (14) having right-angled blades, connected to the waist hole of the lower outlet of the paper sheet guiding channel (13) by bolts, and the distance between the fixed hammers (14) and the hammer (2) is adjusted by the waist hole, the hammer (2) is a rake-type hammer, one end of the hammer mother body (15) is provided with two pin holes (16), connected to the rotor (3) of the pulverizer by two pin rods, and the other end is a working end face (17), the middle of the working end face (17) is provided with a groove, and a rake-type scraper (18) is welded in the groove, The front end of the rake scraper (18) is provided with uniform rake teeth (19), and there are uniform grooves between the rake teeth (19), and the width of the rake teeth (19) and the grooves are the same. The other end of the rake scraper (18) is provided with a mounting groove, which is vertically embedded with the groove in the middle of the working end surface (17) of the hammer mother body (15) and then welded. The thickness of the rake teeth (19) is smaller than the width of the working end surface (17) of the hammer mother body (15), and the ratio between them is between 1 / 2 and 1 / 5. The hammers (2) are divided into four groups, which are symmetrical in pairs and arranged with one rake tooth (19) staggered. The inner cavity of the pulverizer has a screen frame (5), which is isolated from the machine body (8) by a spring structure. A vibration motor (10) is provided under the screen frame (5) to drive the screen (9) to vibrate, and the screen (9) and the rake hammer (2) do not collide with each other.

[0010] When the rake hammer pulverizer is working, the pulp sheet is pushed down by the pressure between the belt conveyor (11) and the pressure roller (12), and enters the pulverizer vertically through the paper sheet guide channel (13) and the fixed hammer (14). The two fixed hammers (14) have right-angled blades, and the even rake teeth (5) hammer the paper sheet in the tangential direction, producing a tearing hammering effect, so that the periphery of the small piece is plush and has no hard marks. The rotation speed of the rake hammer (2) and the feeding speed of the belt conveyor (11) are coordinated with each other to control the length of the small paper sheet. The distance between the fixed hammer (14) and the hammer (2) is adjusted through the waist hole to expose the head of the paper sheet. The hammer (2) hammers and drags on the inclined surface to prevent the tail material from being stuck in the paper sheet guide channel (13). Two pin holes (2) are provided at one end of the hammer mother body (1) to prevent the rake hammer from shaking when working, so that the small paper sheet is more uniform. The thickness of the rake teeth (19) is smaller than the width of the working end face (17) of the hammer mother body (15). This is a key technology for producing an intermittent feeding state and a technology for solving the problem of uniform crushing of tailings. When working, the front corner of the working end face (17) of the hammer mother body (15) first touches the front edge of the paper sheet. Due to the small contact surface, a groove is broken out of the paper sheet. Then, multiple rake teeth (19) hammer the paper sheet again. At this time, due to the long working end face (17), the paper sheet groove rides on the working end face (17), and the paper sheet is supported. After the working end face (17) passes, feeding starts again, forming a feed, stop, feed, stop working state, effectively preventing large tailings from being fed into the crusher at the same time. The ratio of the thickness of the rake teeth (19) to the width of the working end face (17) of the hammer mother body (15) is between 1 / 2 and 1 / 5. When it is greater than 1 / 2, large tailings will be fed into the crusher at the same time. When it is less than 1 / 5, the service life of the rake teeth (19) is short. The rake hammers (2) are installed in four groups, symmetrically arranged in pairs at 180 degrees, and staggered with one rake tooth (19) so that the paper pieces are evenly crushed without gaps. If the rake hammers (2) are worn or a small number of large pieces are accidentally generated, the vibrating screen (9) can eliminate the clogging of the screen holes and prevent fire. The vibrating screen (9) plays a safety role.

[0011] According to the above structure, a rake hammer crusher is provided, which can crush the original pulp paper into uniform small pieces, with fluffy edges and no hard marks, and can solve the problem of uniform crushing of tailings. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a front view of the present invention, excluding the belt conveyor (11) and the pressure roller (12).

[0013] Figure 2 It is a side view cross-sectional schematic diagram of the present invention.

[0014] Figure 3 It is a side cross-sectional schematic diagram of the second embodiment of the present invention.

[0015] Figure 4 The three-dimensional diagram of the rake hammer is shown in FIG. 1 , wherein the thickness of the rake teeth (19) is smaller than the width of the working end surface (17) of the hammer body (15).

[0016] Figure 5 The diagram is a development diagram of the arrangement of the real rake-type hammer pieces of the present invention. The hammer pieces (2) are installed in four groups, symmetrically arranged in pairs at 180 degrees, and staggered by one rake tooth (19). DETAILED DESCRIPTION

[0017] The specific implementation is described in detail below with reference to the accompanying drawings: Example

[0018] like Figure 1 , Figure 2 The hammer pulverizer shown is a hammer pulverizer, which mainly includes a feed inlet (1), a hammer (2), a rotor (3), a screen (9), a discharge port (7), a body (8), and a motor (6). The hammer pulverizer is characterized in that a variable frequency belt conveyor (11) is provided on the feed inlet (1) of the pulverizer, a pressure roller (12) whose pressure is adjusted by a spring, a paper sheet guiding channel (13), two fixed hammers (14) at the lower outlet of the paper sheet guiding channel (13), the fixed hammers (14) having right-angled blades, connected to the waist hole of the lower outlet of the paper sheet guiding channel (13) by bolts, and the distance between the fixed hammers (14) and the hammer (2) is adjusted by the waist hole. The hammer (2) is a rake-type hammer, and two pin holes (16) are provided at one end of the hammer mother body (15), which is connected to the rotor (3) of the pulverizer by two pin rods, and the other end is a working end face (17), and a groove is provided in the middle of the working end face (17), and a rake-type scraper (18) is welded in the groove. The front end of the rake scraper (18) has uniform rake teeth (19), and there are uniform grooves between the rake teeth (19) and the width of the rake teeth (19) and the grooves are the same. The other end of the rake scraper (18) has a mounting groove, which is vertically embedded with the groove in the middle of the working end face (17) of the hammer mother body (15) and then welded. The thickness of the rake teeth (19) is less than the width of the working end face (17) of the hammer mother body (15), and the ratio of each other is between 1 / 2 and 1 / 5. The hammer (2) is divided into four groups, 180 degrees symmetrical in pairs, and staggered by one rake tooth (19). Example

[0019] Figure 3 , which shows another embodiment of the present invention. Its basic structure is similar to Figure 1 , Figure 2 The embodiment shown in the figure is the same, except that the screen (9) is mounted on the screen press frame (5), but a vibration motor (10) is provided below the screen press frame (5), the vibration motor (10) is connected to the screen press frame (5), and the screen press frame (5) is separated from the machine body (8) by a spring vibration isolation device, so that the connected screen (9) and the screen press frame (5) can vibrate independently together, and the screen (9) and the rake hammer (2) do not collide with each other. Beneficial Effects

[0020] Beneficial effects of embodiment 1

[0021] When the rake hammer pulverizer is working, the pulp sheet is pushed down by the pressure between the belt conveyor (11) and the pressure roller (12), and enters the pulverizer vertically through the paper sheet guide channel (13) and the fixed hammer (14). The two fixed hammers (14) have right-angled blades, and the even rake teeth (5) hammer the paper sheet in the tangential direction, producing a tearing hammering effect, so that the periphery of the small piece is plush and has no hard marks. The rotation speed of the rake hammer (2) and the feeding speed of the belt conveyor (11) are coordinated with each other to control the length of the small paper sheet. The distance between the fixed hammer (14) and the hammer (2) is adjusted through the waist hole to expose the head of the paper sheet. The hammer (2) hammers and drags on the inclined surface to prevent the tail material from being stuck in the paper sheet guide channel (13). Two pin holes (2) are provided at one end of the hammer mother body (1) to prevent the rake hammer from shaking when working, so that the small paper sheet is more uniform. The thickness of the rake teeth (19) is smaller than the width of the working end face (17) of the hammer mother body (15). This is a key technology for producing an intermittent feeding state and a technology for solving the problem of uniform crushing of tailings. When working, the front corner of the working end face (17) of the hammer mother body (15) first touches the front edge of the paper sheet. Due to the small contact surface, a groove is broken out of the paper sheet. Then, multiple rake teeth (19) hammer the paper sheet again. At this time, due to the long working end face (17), the paper sheet groove rides on the working end face (17), and the paper sheet is supported. After the working end face (17) passes, feeding starts again, forming a feed, stop, feed, stop working state, effectively preventing large tailings from being fed into the crusher at the same time. The ratio of the thickness of the rake teeth (19) to the width of the working end face (17) of the hammer mother body (15) is between 1 / 2 and 1 / 5. When it is greater than 1 / 2, large tailings will be fed into the crusher at the same time. When it is less than 1 / 5, the service life of the rake teeth (19) is short. The rake hammers (2) are installed in four groups, symmetrically arranged in pairs at 180 degrees, and staggered with one rake tooth (19), so that the paper pieces are crushed evenly without gaps. According to the above structure, a rake hammer crusher is provided, which can crush the original pulp paper pieces into uniform small pieces, with fluffy edges and no hard marks, and can solve the problem of uniform crushing of tailings.

[0022] Beneficial effects of embodiment 2

[0023] If the rake hammer (2) is worn or a small amount of large pieces are accidentally produced, it is not necessary to stop the machine for cleaning. They can be discharged from the crusher through the vibrating screen (9) to prevent fire. The vibrating screen (9) serves as a safety insurance.

[0024] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification, equivalent change or modification made to the above embodiment based on the technical essence of the present invention belongs to the scope of the technical solution of the present invention.

Claims

1. A hammer mill, mainly comprising a feed inlet (1), a hammer (2), a rotor (3), a screen (9), a discharge port (7), a body (8), and a motor (6). Features The feed inlet (1) of the pulverizer is provided with a variable frequency belt conveyor (11), a pressure roller (12) with a spring for adjusting the pressure, and a paper sheet guide channel (13); two fixed hammers (14) are provided at the lower outlet of the paper sheet guide channel (13); the fixed hammers (14) have right-angled blades and are connected to the waist hole of the lower outlet of the paper sheet guide channel (13) through bolts; the distance between the fixed hammers (14) and the hammer (2) is adjusted through the waist hole; the hammer (2) is a rake-type hammer, and the hammer mother body (15) of the rake-type hammer is provided with two pin holes (16) at one end, and is connected to the rotor (3) of the pulverizer by two pin rods, and the other end is a working end face (17), and the working end face (17) has a groove in the middle, and a rake-type scraper (18) is welded in the groove. The front end of the rake scraper (18) is provided with uniform rake teeth (19), and uniform grooves are provided between the rake teeth (19) and the width of the rake teeth (19) is the same as that of the grooves. The other end of the rake scraper (18) is provided with a mounting groove, which is vertically embedded with the groove in the middle of the working end face (17) of the hammer sheet matrix (15) and then welded; the thickness of the rake teeth (19) is smaller than the width of the working end face (17) of the hammer sheet matrix (15). When working, the front corner of the working end face (17) of the hammer sheet matrix (15) first touches the front edge of the paper sheet. Due to the small contact surface, the paper sheet breaks out a groove, and then the plurality of rake teeth (19) hammer the paper sheet again. At this time, due to the long working end face (17), the paper sheet groove rides on the working end face (17), and the paper sheet is supported. After the working end face (17) passes, feeding starts again, forming a feed, stop, feed, stop working state, which effectively prevents large piece tails from being fed into the crusher at the same time.

2. A hammer mill as claimed in claim 1, Features The ratio of the thickness of the rake teeth (19) to the width of the working end surface (17) of the hammer matrix (15) is between 1 / 2 and 1 / 5.

3. A hammer mill as claimed in claim 1, Features The hammer pieces (2) are installed in four groups, symmetrically arranged in pairs at 180 degrees, and arranged with one rake tooth (19) staggered.

4. A hammer mill as claimed in claim 1, Features The inner cavity of the pulverizer has a screen frame (5) which is isolated from the machine body (8) by a spring structure. A vibration motor (10) is provided under the screen frame (5) to drive the screen (9) to vibrate, and the screen (9) and the rake hammer (2) do not collide with each other.

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