Rotary screen
By introducing reinforced transverse ribs, longitudinal ribs, and spiral blades into the drum screen, the problems of easy clogging of the screen holes and difficult cleaning are solved, achieving efficient screening and convenient cleaning, and improving the pulp fiber separation effect and good pulp yield.
Patent Information
- Application Number
- CN202423321636.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2034-12-31
AI Technical Summary
The existing drum screens are prone to clogging, making cleaning difficult, which affects the quality of finished paper products and results in unsatisfactory screening performance.
The screen cylinder adopts a structure with reinforced horizontal and vertical ribs fixedly connected, combined with spiral blades and lifting plates. The screen bars are engaged with the slots. The screen cylinder is equipped with retaining rings and transmission parts at both ends, and return holes are arranged on the spiral blades. The screen holes are designed in a strip shape to prevent clogging and facilitate cleaning.
It improves screening efficiency, reduces manufacturing difficulty, prevents clogging, facilitates cleaning, increases the yield of good pulp, and reduces production costs.
Smart Images
Figure CN223706111U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to papermaking equipment technical field, concretely relates to a drum screen. BACKGROUND
[0002] In the papermaking industry, drum screen is needed to realize the screening and purification of pulp, and the good pulp rich in paper pulp fiber is separated from the tailings in the process, and the good pulp is used for papermaking, thereby ensuring the quality of the finished product.
[0003] The screening area of the drum screen cylinder used at present is a circular screen hole, and since the paper pulp fiber is small and thin, the screen hole of the screening area needs to be small enough to ensure the screening effect. Due to the processing limitation, the normal screen hole is φ10mm, and some impurities will pass through the screen hole in the screening process, and the screening effect is not ideal, thereby affecting the quality of the paper product. At the same time, the circular screen hole is difficult to clean during use, and the screen hole is easy to block, which brings inconvenience to use.
[0004] Therefore, a drum screen capable of effectively ensuring the screening effect and thereby ensuring the product quality, and having low manufacturing difficulty, being not easy to block and being convenient to clean, is an urgent problem to be solved at present. CONTENT OF THE UTILITY MODEL
[0005] The utility model aims at the deficiency of the prior art, and provides a drum screen to ensure the screening effect, and has low manufacturing difficulty, is not easy to block and is convenient to clean.
[0006] To achieve the above object, the utility model adopts the following technical scheme: a drum screen, comprising a screen cylinder, reinforcing horizontal ribs and reinforcing vertical ribs are fixedly arranged on the screen cylinder, the reinforcing horizontal ribs and the reinforcing vertical ribs are fixedly connected with each other, an inlet cylinder and an outlet cylinder are arranged at two ends of the screen cylinder respectively, a blocking ring and a transmission part are arranged on the inlet cylinder and the outlet cylinder respectively, the screen cylinder comprises screen bars and rib strips, the screen bars are in the form of a circular ring, clamping grooves are arranged on the outer periphery of the screen bars, clamping strips are arranged on the inner side of the rib strips, the clamping strips are tightly matched with the clamping grooves, the screen bars are fixedly connected with the reinforcing horizontal ribs, and the rib strips are fixedly connected with the reinforcing vertical ribs.
[0007] Further, spiral fins are arranged around the inside of the screen cylinder, and the two ends of the spiral fins extend into the inlet cylinder and the outlet cylinder respectively, and the spiral fins are fixedly connected with the screen cylinder, the inlet cylinder and the outlet cylinder.
[0008] Further, the spiral fins are arranged with material lifting plates between the pitches, the material lifting plates are arranged in the area corresponding to the spiral fins and the screen cylinder, and the material lifting plates are fixedly connected with the spiral fins and the screen cylinder respectively.
[0009] Further, the material lifting plates are "L" type plates.
[0010] Further, the outlet cylinder is in the shape of a converging bell mouth.
[0011] Further, the spiral piece at the joint of the screen cylinder and the outlet cylinder is provided with a backflow hole.
[0012] The embodiment of the present application has the following beneficial effects:
[0013] 1. The manufacturing is simple, the process is not easy to be blocked, the cleaning is convenient, the uniformity of the screen gap can be effectively ensured, and the quality of the screened pulp is positively affected.
[0014] 2. The backflow hole can realize the partial recovery of the pulp in the tailings, thereby improving the yield of the pulp, reducing the production cost, and facilitating the use in production. BRIEF DESCRIPTION OF DRAWINGS
[0015] Fig. 1 is a schematic diagram of the overall structure of the drum screen of the present application;
[0016] Fig. 2 is a schematic diagram of the longitudinal cross-sectional connection structure of the screen cylinder of the present application.
[0017] Corresponding names of the marks in the figure are as follows:
[0018] 1. Inlet cylinder; 2. Outlet cylinder; 3. Retaining ring; 4. Screen cylinder; 41. Screen bar; 411. Clamping groove; 42. Rib; 421. Clamping strip; 5. Reinforcing horizontal rib; 6. Reinforcing longitudinal rib; 7. Spiral piece; 71. Backflow hole; 8. Material lifting plate. DETAILED DESCRIPTION
[0019] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application belong to the scope of protection of the present application.
[0020] Embodiments of the present application:
[0021] As shown in the drawings, Figs. 1-2 In the drum screen of the present embodiment, a screen cylinder 4 is arranged, an inlet cylinder 1 is arranged at the front end of the screen cylinder 4, and an outlet cylinder 2 is arranged at the end of the screen cylinder 4. The outlet cylinder 2 is in the shape of a converging bell mouth, and retaining rings 3 are arranged on the inlet cylinder 1 and the outlet cylinder 2, respectively.
[0022] The reinforcing cross ribs 5 and the reinforcing longitudinal ribs 6 are welded and fixedly connected with each other, and the reinforcing cross ribs 5 and the reinforcing longitudinal ribs 6 are fixedly connected with the screen cylinder 4 through welding, and the spiral blades 7 are arranged in the interior of the screen cylinder 4, and the material lifting plates 8 are arranged at intervals between the spiral blades 7, and the backflow holes 71 are arranged on the spiral blades 7 at the outlet cylinder body 2.
[0023] The screen cylinder 4 comprises longitudinal screen strips 41 and axial rib strips 42, the screen strips 41 are circular annular, screen gaps are formed between adjacent screen strips, clamping grooves 411 are uniformly arranged on the outer sides of the screen strips 41, clamping strips 421 are arranged on the inner sides of the rib strips 42, the clamping strips 421 are matched with the clamping grooves 411, the screen strips 41 are welded and fixedly connected with the reinforcing cross ribs 5, and the rib strips 42 are welded and fixedly connected with the reinforcing longitudinal ribs 6.
[0024] The principle of the utility model is:
[0025] During manufacturing, a ring-shaped screen strip 41 is placed and fixed, and then the rib strip 42 is clamped on the periphery, the clamping groove 411 and the clamping strip 421 are tightly matched through clamping (the width of the clamping strip 421 is slightly larger than the width of the clamping groove 411, and the rib strip 42 needs to be hit by external force to be matched with the screen strip 41), at this time, the screen strips 41 are installed one by one from top to bottom, and the size of the screen gap between adjacent screen strips 21 is adjusted through hitting, when all the screen strips 41 are installed, the reinforcing cross ribs 5 and the reinforcing longitudinal ribs 6 are welded on the exterior of the screen cylinder 4, and then the entire screen cylinder 4 is manufactured.
[0026] After the screen cylinder 4 is manufactured, the inlet cylinder body 1 and the outlet cylinder body 2 are welded on both ends of the screen cylinder 4, and then the spiral blades 7 and the material lifting plates 8 are welded in the interior of the screen cylinder 4, at this time, the entire equipment has been manufactured.
[0027] During use, the screen cylinder 4 is installed obliquely, the height of the inlet cylinder body 1 is higher than the height of the outlet cylinder body 2, under the rotation of the screen cylinder 4, the spiral blades 7 can stably discharge the slurry from the outlet cylinder body 2, in the process of rotation of the screen cylinder 4, the material lifting plates 8 can lift the slurry to a high place and then drop, so that the slurry can be fully washed, in the process of washing the slurry, the paper pulp fibers in the slurry are screened out from the screen gap, so that the good slurry is formed, and then is used for papermaking.
[0028] The above process involves driving of the rolling screen, and there are many existing driving modes, such as motor driving and transmission belt driving, the transmission belt driving is shown in the embodiment, since the utility model does not involve improvement here, and it is not difficult for those skilled in the art to understand, and it will not be described in detail, but it is obvious that the transmission mode is changed on the basis of the core technical scheme of the utility model, which should also belong to the protection range of the utility model.
[0029] The slurry is left with tailings after elutriation and screening, and the tailings are discharged through the outlet cylinder 2, which is in the shape of a converging bell mouth, facilitating the collection of the tailings and allowing the tailings to be collected to a certain extent at the outlet cylinder 2. Under the action of the pressure between the materials, the residual good slurry in the tailings can be partially returned to the screening area through the return hole 71, thereby improving the yield of the good slurry. It should be noted that the return hole 71 is arranged to improve the yield of the good slurry. Due to the inclined arrangement of the drum screen, the return hole 71 relies on the extrusion between the materials to partially recover the good slurry, and will not achieve full return of the good slurry in the tailings.
[0030] Since the screen gap is in the shape of a strip in the utility model, it is not easy to block during use, and when cleaning is needed, only high-pressure water flushing and brushing are needed, which can quickly clean up and facilitate use in the production process.
Claims
1. A drum screen, comprising a screen cylinder (4), wherein reinforcing transverse ribs (5) and reinforcing longitudinal ribs (6) are fixedly provided on the screen cylinder (4), the reinforcing transverse ribs (5) and reinforcing longitudinal ribs (6) are fixedly connected to each other, an inlet cylinder (1) and an outlet cylinder (2) are respectively provided at both ends of the screen cylinder (4), and retaining rings (3) and transmission parts are respectively provided on the inlet cylinder (1) and the outlet cylinder (2), characterized in that: The screen cylinder (4) includes screen bars (41) and reinforcing bars (42). The screen bars (41) are circular. A groove (411) is provided on the outer periphery of the screen bars (41). A retaining strip (421) is provided on the inner side of the reinforcing bars (42). The retaining strip (421) and the groove (411) fit tightly together. The screen bars (41) are fixedly connected to the reinforcing transverse ribs (5), and the reinforcing bars (42) are fixedly connected to the reinforcing longitudinal ribs (6).
2. A drum screen according to claim 1, characterized in that: The screen cylinder (4) is surrounded by a spiral blade (7), with both ends of the spiral blade (7) extending into the inlet cylinder (1) and the outlet cylinder (2) respectively. The spiral blade (7) is fixedly connected to the screen cylinder (4), the inlet cylinder (1) and the outlet cylinder (2).
3. A drum screen according to claim 2, characterized in that: The spiral blade (7) has a lifting plate (8) arranged between the screw pitches. The lifting plate (8) is arranged in the area corresponding to the spiral blade (7) and the screen cylinder (4). The lifting plate (8) is fixedly connected to the spiral blade (7) and the screen cylinder (4) respectively.
4. A drum screen according to claim 3, characterized in that: The material lifting plate (8) is an "L" shaped plate.
5. A drum screen according to claim 2, characterized in that: The outlet cylinder (2) is in the shape of a closed trumpet.
6. A drum screen according to claim 5, characterized in that: The spiral blade (7) at the connection between the screen cylinder (4) and the outlet cylinder (2) is provided with a return hole (71).