Saw blade and paste crushing and screening machine adopting same
By designing a saw blade with circumferential saw teeth and axial cut-off, the problems of poor crushing effect and low efficiency caused by the flat structure of the existing paste mud crushing screening machine are solved, and a more efficient paste mud crushing effect is achieved.
Patent Information
- Application Number
- CN202421283074.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-05
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-06-05
AI Technical Summary
The flat saw blade used in existing paste mud crushing screening machines has poor crushing effect and low crushing efficiency, making it difficult to effectively deal with block paste mud.
A saw blade including circumferential saw teeth and axial cutout is designed. The saw blade body is a circular plate-like structure, and the circumferential saw teeth are arranged on the outer circumference. The axial cutout protrudes from both ends of the saw blade for further cutting paste mud sliced by circumferential sawtooth.
Through the combined design of circumferential sawtooth and axial cutout, the crushing effect and crushing efficiency of paste mud are significantly improved, and the block paste mud can be effectively processed, which improves the performance of the crusher.
Smart Images
Figure CN222918778U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of crushing, in particular to a saw blade and a paste crushing and screening machine using the saw blade, in particular to a saw blade for crushing paste and a paste crushing and screening machine using the saw blade. Background Art
[0002] Coal slime, calcium carbide slime and other paste muds are easy to clump during storage. With the advancement of filter press technology, the dehydration rate of paste mud has been greatly improved, but the dehydrated paste mud is in block form. These blocky paste muds bring great inconvenience to the subsequent pipeline transportation and disposal. It must be crushed.
[0003] In the prior art, the saw blade used in the paste crushing and screening machine is a flat structure, which has poor crushing effect and low crushing efficiency. Utility Model Content
[0004] The utility model aims to provide a saw blade and a paste crushing and screening machine using the same to improve the crushing effect and crushing efficiency.
[0005] To this end, the utility model provides a saw blade, which includes a saw blade body and axial cutting teeth. The saw blade body is a circular plate-like structure, and circumferential cutting teeth are arranged on the outer circumference of the saw blade body. The axial cutting teeth are fixedly connected to the saw blade body and protrude axially from the end faces of both ends of the saw blade body.
[0006] Preferably, the axial pick comprises an outer peripheral axial pick and an inner peripheral axial pick, and the distance between the outer peripheral axial pick and the center of the saw blade body is greater than the distance between the inner peripheral axial pick and the center of the saw blade body.
[0007] Preferably, an anti-sticking hole is opened on the saw blade body, and the anti-sticking hole penetrates the saw blade body, which is used to prevent mud from adhering to the end surface of the saw blade body.
[0008] Preferably, the number of the peripheral axial cutting teeth is more than three, and they are evenly distributed on the same circumference with the center of the saw blade body as the center.
[0009] The utility model also provides a paste crushing and screening machine, which comprises a screen shaft and a plurality of saw blades arranged on the screen shaft, wherein at least one of the saw blades is the saw blade described above.
[0010] Preferably, there are at least two screen shafts, which are arranged parallel to each other; the saw blades on adjacent screen shafts are staggered in the axial direction, and the distance between the central axes of adjacent screen shafts is less than the diameter of the saw blades and greater than half of the diameter of the saw blades.
[0011] Preferably, the paste crusher and screen also includes a material blocking gate installed above the saw blade for blocking the movement of the paste in the discharging direction so that the saw blade can saw the paste. The mud blocking surface of the material blocking gate is a stepped structure. The discharging direction intersects or is substantially perpendicular to the axial direction of the screen shaft. The axial direction of the screen shaft is substantially coincident with the axial direction of the saw blade or the saw blade body.
[0012] Preferably, the material blocking gate can be switched between an open position and a closed position. When the material blocking gate is in the closed position, it blocks the movement of the paste in the discharging direction; when the material blocking gate is in the open position, it allows the paste or large broken impurities to pass through.
[0013] Preferably, the number of the material blocking gates is two, which divide the sawing and screening working area into two areas.
[0014] Preferably, the rotation directions and speeds of all the screen shafts are the same.
[0015] In addition to the circumferential saw teeth provided on the outer circumference of the saw blade body, the saw blade of the present invention further includes axially extending axial cutting teeth which can further cut the paste sliced by the circumferential saw teeth, thereby improving the crushing effect and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 is a schematic perspective view of a saw blade according to an embodiment of the present invention.
[0017] Figure 2 is Figure 1 the schematic front view of the saw blade shown.
[0018] Figure 3 is the Figure 1 schematic perspective view of the screen shaft assembly of the paste crusher and screen using the saw blade shown.
[0019] Figure 4 is Figure 3 the schematic top view of the screen shaft assembly shown.
[0020] Figure 5 is the schematic top view of the paste crusher and screen.
[0021] Figure 6 is the Figure 5 schematic cross-sectional view taken along line A-A in
[0022] In the figure: 1 saw blade, 11 saw blade body, 12 outer peripheral axial cutting teeth, 13 inner peripheral axial cutting teeth, 2 screen shaft, 3 material blocking gate. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0023] In the accompanying drawings, the same or similar reference numerals are used to denote the same or similar elements or elements having the same or similar functions. The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
[0024] Figure 1 The shown saw blade is used for sawing paste and crushing it into small pieces. The saw blade can be used in a paste crushing and screening machine, thereby greatly improving the crushing effect and crushing efficiency of the paste.
[0025] As Figure 1 and Figure 2 shown, the saw blade according to an embodiment of the present invention includes a saw blade body 11, outer peripheral axial cutting teeth 12, and inner peripheral axial cutting teeth 13. Circumferential saw teeth are provided on the outer circumferential circle of the saw blade body 11 in the radial direction. The outer peripheral axial cutting teeth 12 and the inner peripheral axial cutting teeth 13 are fixedly connected to the saw blade body 11 and axially protrude from the saw blade body 11. As shown in the figure, the distance between the outer peripheral axial cutting teeth 12 and the center of the saw blade body is greater than the distance between the inner peripheral axial cutting teeth 13 and the center of the saw blade body.
[0026] It should be noted that only one of the outer peripheral axial cutting teeth 12 and the inner peripheral axial cutting teeth 13 can be provided. That is to say, the saw blade according to an embodiment of the present invention includes a saw blade body 11 and axial cutting teeth. The saw blade body 11 is a circular plate-like structure. Circumferential saw teeth are provided on the outer circumferential circle of the saw blade body 11. The axial cutting teeth are fixedly connected to the saw blade body 11 and axially protrude from both end faces of the saw blade body 11. It should also be noted that the axial cutting teeth can also be provided to protrude only on one side.
[0027] The saw blade of the present invention, in addition to including the circumferential saw teeth provided on the outer circumferential circle of the saw blade body, also includes axially extending axial cutting teeth. The axial cutting teeth can further cut the paste sliced by the circumferential saw teeth, thereby improving the crushing effect and crushing efficiency.
[0028] In the illustrated embodiment, the outer peripheral axial cutting teeth 12 axially protrude from the saw blade body 11 in both directions; the inner peripheral axial cutting teeth 13 also axially protrude from the saw blade body 11 in both directions. Here, the two directions refer to the left and right sides of the saw blade body. In the illustrated embodiment, the protruding heights on the left and right sides are the same. According to needs, the protruding heights on the left and right sides can also be set to be different; or it can be set to protrude only on one side. The specific protruding height can be set according to needs. For example, the protruding height is set to 5 cm; 10 cm; 15 cm; 20 cm; 25 cm; 30 cm; or other appropriate heights (for the size of one side).
[0029] The axial picks can be fixedly connected to the saw blade body 11 in a suitable manner. For example, the axial picks pass through the corresponding mounting holes on the saw blade body 11 along a direction parallel to the axis and are welded to the saw blade body 11. Other methods can also be used to fix the outer peripheral axial picks 12 and the inner peripheral axial picks 13 to the saw blade body 11, such as using a detachable and replaceable connection method to replace the damaged outer peripheral axial picks 12 or inner peripheral axial picks 13. In an alternative embodiment, the protruding heights on both sides of the axial picks are the same.
[0030] The circumferential saw teeth are used to cut the paste into sections, or slices. Specifically, the circumferential saw teeth are used to saw the paste, and the fed paste is sawn into slices by the circumferential saw teeth and falls due to the action of gravity.
[0031] The outer peripheral axial picks 12 are used to cut the paste material that falls or penetrates due to the sawing of the circumferential saw teeth. The inner peripheral axial picks 13 are used to clean the paste material blocked on the sieve shaft or between the saw blades (i.e., the paste material that does not fall above the sieve shaft).
[0032] The distance between the outer peripheral axial pick 12 and the center of the saw blade body is greater than the distance between the inner peripheral axial pick 13 and the center of the saw blade body. The center of the saw blade body refers to the rotation center of the saw blade body, or the axis of the rotation center.
[0033] The outer peripheral axial picks 12 are arranged adjacent to the outermost periphery of the saw blade body. The inner peripheral axial picks 13 are generally arranged at an intermediate position between the outer peripheral axial picks 12 and the outer periphery of the center hole of the saw blade body.
[0034] In the illustrated embodiment, there are 7 outer peripheral axial picks 12, which are evenly distributed in the circumferential direction. The number of the outer peripheral axial picks 12 can be set as required and is not limited to the 7 shown in the figure. For example, in an alternative embodiment, the number of the outer peripheral axial picks 12 is set to be more than three; and they are evenly distributed on the same circumference with the center of the saw blade body as the center of the circle.
[0035] There is only 1 inner peripheral axial pick 13. This can reduce the number of the inner peripheral axial picks 13, and the same good cleaning effect can also be achieved. The number of the inner peripheral axial picks 13 can also be set to be multiple.
[0036] The falling sheet-shaped paste is cut into small segments by the outer peripheral axial picks 12. The sheet-shaped paste above the sieve shaft will hit the inner peripheral axial picks 13 when falling, and is cut or pushed by the inner peripheral axial picks 13 to partially or completely leave above the sieve shaft, and fall off from the blockage of the sieve shaft. Among them, part of the paste adhered to the inner peripheral axial picks 13 will be cut off by the outer peripheral axial picks 12 of the saw blade 1 on the adjacent sieve shaft 2 and be cleaned.
[0037] See Figure 1 and Figure 2, anti - sticking holes 14 are formed in the saw blade body 11. The anti - sticking holes 14 penetrate through the saw blade body 11 and are used to prevent the mud material from sticking to the end faces of the saw blade body 11. More specifically, in the illustrated embodiment, there are also 5 fan - shaped holes (anti - sticking holes 14) formed in the saw blade body 11. The anti - sticking holes 14 penetrate through the saw blade body 11 axially. The anti - sticking holes 14 are used to prevent the mud material from sticking to the two side end faces of the saw blade body 11. The shape, number and position of the anti - sticking holes 14 can be set as required. In an alternative embodiment, the total area of the anti - sticking holes 14 is greater than 75% of the total area of the plane of the saw blade body 11 (including the total area of the anti - sticking holes 14).
[0038] The paste - mud crushing and screening machine according to the embodiment of the present utility model includes a screen shaft 2 and a plurality of saw blades arranged on the screen shaft 2, and at least one of the saw blades is the saw blade as described above.
[0039] As Figure 3 and Figure 4 shown, the screen - shaft assembly of the paste - mud crushing and screening machine according to the embodiment of the present utility model includes a plurality of saw blades 1 ( Figure 4 exemplarily set to 18 in the figure) and a screen shaft 2. Each saw blade 1 is coaxially mounted on the screen shaft 2 and rotates integrally under the drive of the screen shaft 2. There is an axial gap between adjacent saw blades. The installation angles of all the saw blades 1 are the same, that is to say, all the saw blades 1 are arranged in parallel. The planes where the saw blade bodies 11 are located are all perpendicular to the central axis of the screen shaft 2. The paste - mud crushing and screening machine of the illustrated embodiment includes a plurality of screen - shaft assemblies and two baffle gates 3. Each screen - shaft assembly is parallel, and the saw blades 1 on adjacent screen shafts are inserted into the gaps of the saw blades 1 of each other. All the saw blades form a saw - blade screening surface. The two baffle gates 3 divide the sawing and screening working area into two areas.
[0040] That is to say, the number of the screen shafts 2 is at least two ( Figure 6 exemplarily set to 12 in the figure), and they are arranged in parallel; the saw blades on adjacent screen shafts 2 are arranged staggeredly axially, the distance between the central axes of adjacent screen shafts 2 is less than the diameter of the saw blade and greater than half of the diameter of the saw blade.
[0041] As shown in the figure, the baffle gate 3 is installed above the saw blade and is used to block the movement of the paste - mud in the discharging direction ( Figure 6 the right - hand direction in the figure), so that the saw blade can saw the paste - mud. The mud - blocking surface of the baffle gate 3 is a stepped structure. The discharging direction intersects with the axial direction of the screen shaft, or is approximately perpendicular to each other. The axial direction of the screen shaft is approximately coincident with the axial direction of the saw blade or the saw - blade body.
[0042] The baffle gate 3 can be switched between an open position and a closed position. When the baffle gate 3 is in the closed position, the baffle gate 3 blocks the movement of the paste in the discharge direction; when the baffle gate 3 is in the open position, the baffle gate 3 allows the paste or large impurities after crushing to pass through.
[0043] In an optional embodiment, all saw blades have the same rotation direction and rotation speed, that is, all screen shafts 2 have the same rotation direction and rotation speed. This allows the outer axial picks 12 and inner axial picks 13 on adjacent screen shaft assemblies to intersect each other without colliding. For example, a motor is used to drive a drive unit, and each screen shaft 2 has the same transmission ratio with the motor output shaft. Thus, all screen shafts 2 have the same rotation direction and rotation speed.
[0044] The paste mud falling on the screen surface is blocked by the material blocking gate plate 3 and moves relative to the saw blade 1 to be sawed. The sawn-off flaky paste mud falls along the gap between the saw blades 1 and is then cut into pieces by the peripheral axial pick teeth. The flaky paste mud above the screen shaft is cut or pushed away by the inner axial pick teeth during the falling process, and is further cut or pushed away by the peripheral axial pick teeth on the adjacent screen shaft. The accumulation of flaky paste mud above the screen shaft is prevented, and the sawing and crushing of the entire screen surface is achieved.
[0045] Due to the barrier effect of the screen surface composed of saw blades, the hard impurities in the paste that are difficult to break are screened out instead of forced crushing, which not only saves energy but also does not cause equipment overload and damage.
[0046] The peripheral axial cutting teeth 12 can cut the cake-like paste that moves downward due to sawing into small sections, which can prevent it from falling in the form of large cakes and affecting the crushing effect. The screened material is finer and more conducive to subsequent mixing and pipeline transportation.
[0047] The inner axial pick 13 can cut or push away the cake-like paste on the screen shaft 2, and then the outer axial pick 12 on the adjacent screen shaft cleans the area around the inner axial pick 13, avoiding partial or complete crushing and loss of screening function due to the paste material.
[0048] The paste adhered to the saw blade body 11 will fall off when sliding downward through the anti-sticking hole 14 because there is no attachment, thereby avoiding the sticking failure of the saw blade body 11.
[0049] When the material blocking gate 3 is closed (such as Figure 6 As shown in the figure, the paste can be blocked, so that it moves relative to the saw blade 1 and is cut. When the material blocking gate 3 is opened, the hard impurities on the saw blade that are difficult to break will be discharged. Through the coordinated and alternate opening and closing of the two material blocking gates 3, the front and rear crushing and screening chambers can alternately crush and discharge materials, which can not only discharge impurities in time, but also prevent the paste from being discharged by mistake, so that both sawing and screening can achieve good results.
[0050] To open the material retaining shutter 3, it can be lifted upward by a hydraulic cylinder to open it, so as to open a passage for discharging impurities (such as larger stones).
[0051] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting it. Those of ordinary skill in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some of the technical features can be equivalently replaced; these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A saw blade, characterized in that: The saw blade comprises a saw blade body (11) and axial cutting teeth. The saw blade body (11) is a circular plate-like structure. Circumferential cutting teeth are arranged on the outer circumference of the saw blade body (11). The axial cutting teeth are fixedly connected to the saw blade body (11) and protrude axially from the end faces of both ends of the saw blade body (11).
2. The saw blade according to claim 1, characterized in that The axial pick comprises an outer peripheral axial pick (12) and an inner peripheral axial pick (13), and the distance between the outer peripheral axial pick (12) and the center of the saw blade body is greater than the distance between the inner peripheral axial pick (13) and the center of the saw blade body.
3. The saw blade according to claim 1, characterized in that The saw blade body (11) is provided with an anti-sticking hole (14), which penetrates the saw blade body (11) and is used to prevent mud from sticking to the end surface of the saw blade body (11).
4. The saw blade according to claim 2, characterized in that: The number of the peripheral axial cutting teeth (12) is more than three, and they are evenly distributed on the same circumference with the center of the saw blade body as the center.
5. A paste crushing and screening machine, characterized in that: The paste crushing and screening machine comprises a screen shaft (2) and a plurality of saw blades arranged on the screen shaft (2), wherein at least one of the saw blades is a saw blade according to any one of claims 1 to 4.
6. The paste crushing and screening machine according to claim 5, characterized in that: The number of the sieve shafts (2) is at least two and they are arranged parallel to each other; the saw blades on adjacent sieve shafts (2) are staggered in the axial direction, and the distance between the central axes of adjacent sieve shafts (2) is less than the diameter of the saw blades and greater than half the diameter of the saw blades.
7. The paste crushing and screening machine according to claim 5, characterized in that: It also comprises a material blocking gate (3) which is installed above the saw blade and is used to block the movement of the paste in the material discharge direction so that the saw blade can saw the paste. The paste blocking surface of the material blocking gate (3) is a stepped structure.
8. The paste crushing and screening machine according to claim 7, characterized in that: The material blocking gate (3) can be switched between an open position and a closed position. When the material blocking gate (3) is in the closed position, the material blocking gate (3) blocks the movement of the paste in the discharge direction; when the material blocking gate (3) is in the open position, the material blocking gate (3) allows the paste or large impurities after crushing to pass through.
9. The paste crushing and screening machine according to claim 7 or 8, characterized in that: The number of the material blocking gates (3) is two, which divide the sawing and screening working area into two areas.
10. The paste crushing and screening machine according to any one of claims 5 to 8, characterized in that: The rotation direction and speed of all screen shafts (2) are the same.