Wood chip sieve

Abstract

The utility model relates to a wood chip sieve, including: frame, roller, drive mechanism, fixing mechanism and gasket, said roller is equipped with the roller tooth, said roller passes through the fixing mechanism and is installed said frame, the surface of roller is equipped with the roller tooth; a roller tooth gap is formed between the roller teeth of every two adjacent rollers, and the roller tooth gaps are used for screening wooden sticks; the distance between every two adjacent rollers is changed by additionally arranging the gaskets at the connecting positions of the rack and the rollers, so that the roller tooth gaps are changed, unqualified wood chips and qualified wood sticks are effectively separated, fine adjustment of the roller tooth gaps is achieved through the arrangement of the gaskets, and the problems that the machining difficulty of roller teeth of a wood chip screen is large, and the machining efficiency is high are solved. And the size of the screened wood chips cannot be flexibly adjusted. The wood chip sieve provided by the utility model is particularly suitable for screening out wood chips larger than 3mm and is used for the subsequent cooking process, the wood chips smaller than 3mm are filtered through the wood chip sieve to serve as biomass fuel and do not enter the cooking process, and the utilization rate of wood chips is improved.

Description

Technical Field

[0001] The utility model relates to the technology of wood chip roller screens, in particular to a wood chip screen. Background Art

[0002] In the wood chip mass after being screened by the preliminary wood chip screening equipment, there are not only sand grains, fine grains and other impurities, but also some wooden sticks that can be used as raw materials for pulping. Therefore, re-screening the above-mentioned wood chip mass can separate the available wooden sticks from the wood chips, save production raw materials and have certain economic benefits.

[0003] There is a diamond roller screen on the current market. By arranging galvanized solid shafts with the surfaces of the screen rollers cut into diamond-shaped patterns side by side, it can push the wood chip mass to move from one roller to another through the feed inlet and run towards the discharge outlet, so that the wood chip mass passes through the gaps between the rollers multiple times. Sand grains, fine grains and other impurities fall onto the conveyor below through the gaps between the diamond-shaped roller shafts and are sent to the storage bin for stacking, and then can be used as biomass fuel to generate heat energy. The diamond-shaped roller shafts convey the large-sized wooden sticks received to the outlet chute, and this part can be directly used as qualified wood chips for pulping raw materials, thus improving the utilization rate of wood and reducing production costs. However, there are problems such as the complex surface shape of the roller shafts, difficult processing and maintenance, and inability to adjust the roller spacing as needed to adjust the size of the screened wooden sticks, especially for screening out wood chips larger than 3 mm. Summary of the Utility Model

[0004] Aiming at the above defects, the purpose of the utility model is to provide a wood chip screen, which solves the technical problems of the large processing difficulty of the roller teeth of the wood chip screen and the inability to flexibly adjust the size of the screened wood chips. The wood chip screen proposed by the utility model is especially suitable for the requirement of screening out wood chips larger than 3 mm and is used for the subsequent cooking process. The wood chips smaller than 3 mm are filtered through the wood chip screen and used as biomass fuel without entering the cooking process, thus improving the utilization rate of wood chips.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A wood chip screen includes: a frame, a plurality of roller cylinders, a driving mechanism, a fixing mechanism and gaskets;

[0007] The roller cylinders are installed on the frame through the fixing mechanism;

[0008] Both ends of the roller cylinders are provided with mounting rollers, and the surfaces of the roller cylinders are provided with roller teeth;

[0009] Roller tooth gaps are formed between the roller teeth of two adjacent roller cylinders, and the roller tooth gaps are used for screening wooden sticks;

[0010] The driving mechanism is used to drive the rotation of the roller cylinders;

[0011] The gasket is used to adjust the distance between adjacent rollers.

[0012] Furthermore, the frame is provided with a plurality of installation grooves for installing the rollers and the gaskets. The lower part of the gasket is provided with a clamping groove which is detachably installed in the installation groove. The installation of the gasket is used to adjust the lateral width in the installation groove.

[0013] Furthermore, it further includes a speed indicator which is installed on the last roller of each section of the wood chip sieve, and the speed indicator is communicatively connected with the driving mechanism.

[0014] Furthermore, the roller is a hollow pipe circular tube, and the surface of the roller is provided with a chromium plating layer.

[0015] Furthermore, the fixing mechanism is a flange type bearing seat.

[0016] Furthermore, the roller teeth protrude from the outer surface of the roller, and the protruding direction of the roller teeth is perpendicular to the axis direction of the roller.

[0017] Furthermore, a plurality of convex rings are arranged at intervals along the axial direction of the roller. The outer periphery of the convex ring is provided with the roller teeth. A dislocation groove is provided between adjacent convex rings. The dislocation groove is used to be directly opposite to the convex ring of the adjacent roller. The distance from the side wall of the convex ring of the roller to the side walls of the two adjacent convex rings of the adjacent roller is the first screening gap and the second screening gap. The distance from the end of the roller teeth of one roller to the bottom of the dislocation groove of the adjacent roller is the third screening gap. The sizes of the first screening gap, the second screening gap and the third screening gap are equal.

[0018] Furthermore, the first screening gap, the second screening gap and the third screening gap are all 3 mm.

[0019] Compared with the prior art, the technical solution provided by the present utility model may include the following beneficial effects:

[0020] A kind of wood chip sieve in the technical solution provided by the embodiment of the present utility model includes: a frame, a roller, a driving mechanism, a fixing mechanism and a gasket. The roller is provided with roller teeth, and the roller is fixed to the frame through the fixing mechanism; the installation directions of two adjacent rollers are opposite, so roller teeth gaps are generated between two adjacent rollers, and the roller teeth gaps are used for screening wooden sticks. The rollers rotate in the same direction under the drive of the driving mechanism. Raw materials enter from the feed port. Wooden sticks with a size larger than the set value will be sent to the discharge port through the rollers, and wood chips with a size smaller than the set value will fall from the roller teeth gaps to the wood chip collection place. By adding the gasket at the connection between the frame and the roller, the distance between two adjacent rollers is changed, so as to change the roller teeth gaps, effectively separating unqualified wood chips and qualified wooden sticks, saving raw materials. Through the setting of the gasket, fine adjustment of the roller teeth gaps is realized, solving the technical problems that the processing difficulty of the roller teeth of the wood chip sieve is large and the screening size of wood chips cannot be flexibly adjusted. The wood chip sieve proposed by the present utility model is especially suitable for the requirement of screening out wood chips larger than 3 mm, for the subsequent cooking process, filtering out wood chips smaller than 3 mm through the wood chip sieve and using them as biomass fuel without entering the cooking process, improving the utilization rate of wood chips. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a structural schematic diagram of the present utility model;

[0022] Figure 2 is Figure 1 an enlarged view of area A of

[0023] Figure 3 is a structural schematic diagram of the vehicle frame of the present utility model;

[0024] Figure 4 is a structural schematic diagram of the fixing mechanism of the present utility model;

[0025] Figure 5 is a structural schematic diagram of the tooth pitch gap of the present utility model;

[0026] Figure 6 is a sectional view of the roller of the present utility model;

[0027] Figure 7 is a structural schematic diagram of the gasket and the machine tool of the present utility model;

[0028] Wherein: frame 1, installation groove 11, roller 2, roller teeth 21, first screening gap 22, second screening gap 23, third screening gap 24, installation roller 25, driving mechanism 3, driving unit 31, transmission unit 32, fixing mechanism 4, gasket 5, clamping groove 51 and speed indicator 6. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0030] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features, which are used to distinguish and describe features, without order or importance.

[0031] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0032] The technical solution of the present utility model will be further described below with reference to the accompanying drawings and through specific embodiments.

[0033] A preferred embodiment in the present application is as Figures 1 to 7 shown. A wood chip sieve includes: a frame 1, a plurality of rollers 2, a driving mechanism 3, a fixing mechanism 4, and a gasket 5;

[0034] The roller 2 is installed on the frame 1 through the fixing mechanism 4;

[0035] Both ends of the roller 2 are provided with mounting rollers 25, and the surface of the roller 2 is provided with roller teeth 21;

[0036] Roller teeth gaps are formed between the roller teeth 21 of two adjacent rollers 2, and the roller teeth gaps are used for screening wooden sticks;

[0037] The driving mechanism 3 is used to drive the roller 2 to rotate;

[0038] The gasket 5 is used to adjust the distance between adjacent rollers 2.

[0039] Specifically, the rollers 2 are of the same size, shape, and processing method. The rollers 2 rotate in the same direction under the drive of the drive mechanism 3. The raw materials enter from the feed port. The wooden sticks with dimensions larger than the set value will be sent to the discharge port through the rollers 2, and the wood chips with dimensions smaller than the set value will fall from the gaps between the roller teeth to the wood chip collection area. The mounting roller 25 is installed on the frame 1. By adding the gasket 5 at the connection between the frame 1 and the mounting roller 25, the distance between two adjacent rollers 2 is changed. For example, by adding a gasket on the left side of the connection between the roller 2 and the frame 1, the mounting roller 25 is moved to the right side of the connection of the frame 1, so that the whole roller 2 moves to the right, reducing the gaps between the roller teeth. Conversely, the gaps between the roller teeth can be increased, effectively separating unqualified wood chips and qualified wooden sticks, saving raw materials. Through the setting of the gasket 5, fine adjustment of the gaps between the roller teeth is achieved, solving the technical problems of the large processing difficulty of the roller teeth of the wood chip sieve and the inability to flexibly adjust the screening size of the wood chips. The wood chip sieve proposed by the present utility model is particularly suitable for the requirement of screening out wood chips larger than 3 mm, which is used for the subsequent cooking process. The wood chips smaller than 3 mm are filtered through the wood chip sieve and used as biomass fuel without entering the cooking process, improving the utilization rate of the wood chips.

[0040] In an alternative embodiment, the frame 1 is provided with a plurality of mounting grooves 11 for mounting the rollers 2 and the gaskets 5. The lower part of the gasket 5 is provided with a clamping groove 51, and the clamping groove 51 is detachably installed in the mounting groove 11. The installation of the gasket 5 is used to adjust the lateral width in the mounting groove 11.

[0041] Specifically, the mounting groove 11 is U-shaped. If a certain roller is worn and needs to be maintained or replaced, only the fixing mechanisms 4 at both ends of this roller need to be disassembled, and the corresponding roller can be taken out separately, which is convenient for assembly and maintenance. The mounting roller 25 is installed in the mounting groove 11, and the gasket 5 is installed between the mounting groove 11 and the mounting roller 25. The gasket 5 is installed on the mounting groove 11 through the clamping groove 51, and the number of the gaskets 5 can be increased or decreased as needed to change the relative positions of the adjacent rollers 2, thereby changing the size of the gaps between the adjacent rollers.

[0042] In an alternative embodiment, it further includes a speed indicator 6. The speed indicator 6 is installed on the last roller 2 of each section of the wood chip sieve, and the speed indicator 6 is communicatively connected with the drive mechanism 3.

[0043] Specifically, the wood chip sieve is composed of several roller groups. Each group has multiple rollers 2 and one driving mechanism 3. The driving mechanism 3 includes a driving unit 31 and a transmission unit 32. In each group, one of the rollers 2 is directly connected to the driving unit 31, and the driving unit 31 drives the roller 2 to rotate actively. The remaining rollers 2 are connected to the actively rotating roller 2 through the transmission unit 32. The speed indicator 6 is installed on the last roller 2 in each group. The speed indicator 6 is used to display the rotation speed of the current roller 2. When the roller 2 stops rotating or the rotation speed is lower than the set speed, the driving mechanism 3 will stop conveying materials to the wood chip sieve.

[0044] In an alternative embodiment, the roller 2 is a hollow pipe round tube, and the surface of the roller 2 is provided with a chromium plating layer.

[0045] Specifically, using a hollow round tube can reduce the overall weight of the roller 2, reduce material costs, and at the same time can also reduce the input power of the motor and lower energy consumption. The entire roller 2 is chromium-plated to increase surface hardness and extend service life.

[0046] In an alternative embodiment, the fixing mechanism 4 is a flange type bearing seat.

[0047] Specifically, the mounting roller 25 is installed on the frame 1 through a flange type bearing seat. The flange type bearing seat has higher support stiffness, better fixes the bearing and increases the stability of the bearing, and can withstand impacts from heavy loads in different directions, ensuring that the roller 2 can rotate at high speed.

[0048] In an alternative embodiment, the roller teeth 21 protrude from the outer surface of the roller 2, and the protruding direction of the roller teeth 21 is perpendicular to the axis direction of the roller 2.

[0049] Specifically, the roller teeth 21 on the roller 2 are distributed at equal intervals, which reduces the processing difficulty and is convenient for ensuring processing accuracy.

[0050] In an alternative embodiment, a number of convex rings are arranged at intervals along the axial direction of the roller 2. The outer circumference of the convex ring is provided with roller teeth. A dislocation groove is provided between adjacent convex rings. The dislocation groove is used to be directly opposite to the convex rings of adjacent rollers. The distance from the side wall of the convex ring of one roller to the side walls of the two adjacent convex rings of the adjacent roller is the first screening gap 22 and the second screening gap 23. The distance from the end of the roller teeth of one roller to the bottom of the dislocation groove of the adjacent roller is the third screening gap 24. The sizes of the first screening gap 22, the second screening gap 23, and the third screening gap 24 are equal.

[0051] Specifically, both the convex ring and the roller teeth are formed by machining on the roller 2, and the convex ring and the roller teeth are integral. The specific processing sequence is to first uniformly machine the convex ring on the surface of the roller, and then process the roller with the convex ring to machine the roller teeth on the outer periphery of the convex ring. The roller is formed with a plurality of convex rings arranged at intervals to form a roller tooth gap, which is easy to design and simple to process. Different rollers can be quickly designed and produced according to different requirements for the size of wood chips. Moreover, by making the sizes of the first screening gap 22, the second screening gap 23, and the third screening gap 24 equal, it is ensured that wood chips of the target size are screened out, realizing the grading of small-size wood chips.

[0052] In an alternative embodiment, the first screening gap 22, the second screening gap 23, and the third screening gap 24 are all 3 mm.

[0053] The technical principle of the present utility model has been described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present utility model and cannot be construed in any way as a limitation on the protection scope of the present utility model. Based on the explanations herein, those skilled in the art can readily conceive of other specific embodiments of the present utility model without creative efforts, and these embodiments will all fall within the protection scope of the present utility model.

Claims

1. A wood chip screen, characterized in that: include: A frame, a number of rollers, a driving mechanism, a fixing mechanism and a gasket; The roller is mounted on the frame via a fixing mechanism; Mounting rollers are provided at both ends of the roller, and roller teeth are provided on the surface of the roller; The roller teeth of two adjacent rollers form a roller tooth gap, and the roller tooth gap is used to screen wooden sticks; The driving mechanism is used to drive the roller to rotate; The spacer is used to adjust the distance between adjacent rollers.

2. A wood chip screen according to claim 1, characterized in that: The frame is provided with a plurality of mounting grooves for mounting the roller and the gasket. A clamping groove is provided at the lower part of the gasket, and the clamping groove is detachably mounted in the mounting groove. The installation of the gasket is used to adjust the lateral width in the mounting groove.

3. A wood chip screen according to claim 1, characterized in that: It also includes a speed indicator, which is installed on the last roller of each section of the wood chip screen and is communicatively connected with the driving mechanism.

4. A wood chip screen according to claim 1, characterized in that: The roller is a hollow round tube, and a chrome-plated layer is provided on the surface of the roller.

5. A wood chip screen according to claim 1, characterized in that: The fixing mechanism is a flange type bearing seat.

6. A wood chip screen according to claim 1, characterized in that: The roller teeth are protrudingly arranged on the outer surface of the roller, and the protruding direction of the roller teeth is perpendicular to the axial direction of the roller.

7. A wood chip screen according to claim 1, characterized in that: The roller is provided with a plurality of convex rings arranged at intervals along its axial direction, the outer circumference of the convex ring is provided with the roller teeth, and offset grooves are provided between adjacent convex rings, and the offset grooves are used to be directly opposite to the convex rings of adjacent rollers. The distance from the side wall of the convex ring of the roller to the side walls of two adjacent convex rings of the adjacent roller is the first screening gap and the second screening gap, and the distance from the end of the roller teeth of the roller to the bottom of the offset groove of the adjacent roller is the third screening gap, and the first screening gap, the second screening gap and the third screening gap are equal in size.

8. A wood chip screen according to claim 7, characterized in that: The first screening gap, the second screening gap and the third screening gap are all 3 mm.

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