Self-cleaning spraying device of drum screen and drum screen

Abstract

The utility model relates to a rotary drum screen, in particular to a rotary drum screen self-cleaning spraying device and a rotary drum screen, which comprise a liquid inlet pipe and conveying spraying mechanisms, the liquid inlet pipe is provided with a liquid inlet, the two ends of the liquid inlet pipe are provided with the conveying spraying mechanisms, and each conveying spraying mechanism comprises a main conveying pipe, a branch conveying pipe and a spraying pipe. The self-cleaning spraying device comprises a main conveying pipe, one end of the main conveying pipe is communicated with the end of a liquid inlet pipe through a reducing joint, the main conveying pipe is connected with at least one branch conveying pipe, each branch conveying pipe is connected with a spraying pipe, and each branch conveying pipe is provided with a flux adjusting valve. Omnibearing dead-corner-free spraying of the drum screen can be achieved, and cleaning of pipelines is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to a drum cylinder screen, especially to a drum cylinder screen self-cleaning spraying device and a drum cylinder screen. BACKGROUND

[0002] The drum cylinder screen mainly comprises a cylinder part, a supporting roller device, a transmission device, a shroud, a water spraying system and a pulp tank. The cylinder part can be placed on the two supporting roller devices at an angle of 1°-10°, and the screen holes are arranged from large to small from the feeding end to the pulp tank to make the pulp enter the pulp tank as soon as possible and reduce the load of the cylinder part. In addition, a certain number of lifting plates, inclined support plates and partition plates are evenly distributed inside the cylinder part to support and reinforce the cylinder part, which greatly reduces the deformation of the cylinder part during operation. The gear transmission part adopts a tooth holder integrated structure, which reduces the equipment installation and maintenance time. The shroud adopts a spraying structure with double-side water inlet and double-row staggered arrangement, which makes the cylinder part easier to clean and the dilution and cleaning effect more complete. The pulp tank is provided with a guide wall, and the internal pulp circulates and moves along the guide wall under the action of the stirring device to realize secondary rubbing and loosening of the internal pulp and separate the impurities again to reduce the fiber loss rate.

[0003] However, the existing spraying structure has certain defects, such as dead angle inside, slag accumulation, easy clogging of the spraying water holes, and the need for regular cleaning, which not only increases the cost but also affects the production efficiency during shutdown maintenance. Therefore, the existing spraying structure cannot meet the production requirements. CONTENT OF THE UTILITY MODEL

[0004] The utility model solves the technical problem to provide a drum cylinder screen self-cleaning spraying device, which can realize full-range and dead-angle-free spraying of the drum cylinder screen.

[0005] To solve the above technical problems, the utility model adopts the technical scheme of a drum cylinder screen self-cleaning spraying device, which comprises a liquid inlet pipe and a conveying and spraying mechanism. The liquid inlet pipe is provided with a liquid inlet, and the two ends of the liquid inlet pipe are provided with the conveying and spraying mechanism. The conveying and spraying mechanism comprises a total conveying pipe, a branch conveying pipe and a spraying pipe. The diameter of the total conveying pipe is smaller than that of the liquid inlet pipe. One end of the total conveying pipe is connected to the end of the liquid inlet pipe through a reducer. The branch conveying pipe is provided with a flux adjusting valve. One end of each branch conveying pipe is connected to the total conveying pipe, and the other end of each branch conveying pipe is connected to the spraying pipe. The spraying pipe is provided with a plurality of spraying holes on the wall.

[0006] The liquid medicine entering the liquid inlet pipe from the liquid inlet is divided into two parts and flows into the two conveying and spraying mechanisms. The liquid medicine flows from the total conveying pipe into each branch conveying pipe and then flows into the designated spraying pipe from each branch conveying pipe, which realizes full-range spraying of the drum cylinder screen. The amount of liquid distributed in each spraying pipe can be adjusted to make full use of the liquid medicine.

[0007] As an optional solution, the end of the spray pipe is provided with a switch valve. When spraying the liquid medicine, the switch valve is closed, and the liquid medicine is sprayed from the spray holes of each spray pipe into the drum cylinder screen. When pipeline cleaning is needed, the switch valve can be opened, and the liquid medicine and cleaning water are discharged from the end of the spray pipe.

[0008] As an optional solution, the diameter of the spray pipe is larger than the diameter of the channel in the switch valve, and the spray pipe is connected with the switch valve through a reducing joint.

[0009] As an optional solution, the total delivery pipe of each delivery and spraying mechanism is coaxial with the liquid inlet pipe, and each spray pipe is parallel to the liquid inlet pipe.

[0010] As an optional solution, the end of the total delivery pipe is provided with a 90° elbow pipe, and the end of the total delivery pipe is connected with a branch delivery pipe through the 90° elbow pipe.

[0011] As an optional solution, one end of the spray pipe communicates with the branch delivery pipe, and the other end of the spray pipe faces the direction of the other delivery and spraying mechanism.

[0012] Based on the same inventive concept, the utility model also provides a technical scheme: a drum cylinder screen comprising the self-cleaning spray device.

[0013] Beneficial effects: 1. The self-cleaning spray device can realize no-dead-angle liquid medicine spraying, and the liquid medicine circulates smoothly, the pipelines and spray holes are not easy to be blocked, the equipment maintenance period is reduced, and the production efficiency is increased; 2. When the liquid medicine is replaced, the self-cleaning spray device can clean the pipelines more conveniently, and only needs to open the switch valve at the end of the spray pipe, thereby saving labor and time. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0015] Figure 1 It is a structural schematic view of the self-cleaning spray device.

[0016] In the figure: 1, liquid inlet pipe, 2, liquid inlet, 3, total delivery pipe, 4, branch delivery pipe, 5, spray pipe, 6, flux regulating valve, 7, switch valve. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be clearly and completely described 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. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative effort belong to the scope of the present application.

[0018] Please refer to Figure 1 To solve the technical problems in the background art, the embodiment 1 of the present application provides a self-cleaning spraying device for drum cylinder screen, which comprises a liquid inlet pipe 1 and a conveying and spraying mechanism. The liquid inlet pipe 1 is provided with a liquid inlet 2. The two ends of the liquid inlet pipe 1 are provided with the conveying and spraying mechanism. The conveying and spraying mechanism comprises a total conveying pipe 3, a branch conveying pipe 4 and a spraying pipe 5. The diameter of the total conveying pipe 3 is smaller than that of the liquid inlet pipe 1. One end of the total conveying pipe 3 is communicated with the end of the liquid inlet pipe 1 through a reducer. The branch conveying pipe 4 is provided with a flux adjusting valve 6. One end of each branch conveying pipe 4 is communicated with the total conveying pipe 3. The other end of each branch conveying pipe 4 is connected with the spraying pipe 5. The wall of the spraying pipe 5 is provided with a plurality of spraying holes.

[0019] Specifically, the liquid inlet 2 on the liquid inlet pipe 1 is used to connect a liquid medicine supply system. The liquid medicine enters the liquid inlet pipe 1 through the liquid inlet 2 and is then divided into two ends of the liquid inlet pipe 1, so as to be dispersed into the two conveying and spraying systems. In some embodiments, the liquid inlet pipe 1 comprises a three-way joint and two pipe bodies. One joint of the three-way joint is the liquid inlet 2. The other two joints of the three-way joint are connected with one end of the two pipe bodies respectively.

[0020] The conveying and spraying system comprises the total conveying pipe 3, the branch conveying pipe 4 and the spraying pipe 5. The diameter of the total conveying pipe 3 is smaller than that of the liquid inlet pipe 1. One end of the total conveying pipe 3 is communicated with the end of the liquid inlet pipe 1 through a reducer. From the liquid inlet pipe 1 to the reducer and then to the total conveying pipe 3, the diameter gradually decreases. The liquid medicine in the liquid inlet pipe 1 is pressurized to a certain extent after entering the total conveying pipe 3. The total conveying pipe 3 is provided with at least one branch conveying pipe 4. When the branch conveying pipe 4 is one, one end of the branch conveying pipe 4 is communicated with the end of the total conveying pipe 3. When the branch conveying pipe 4 is two or more, one end of one of the branch conveying pipes 4 is communicated with the end of the total conveying pipe 3. One end of each of the rest branch conveying pipes 4 is communicated with the joint on the pipe body of the total conveying pipe 3. Each branch conveying pipe 4 is provided with a flux adjusting valve. The flux adjusting valve is used to adjust the liquid medicine flow flux of the branch conveying pipe 4. The other end of each branch conveying pipe 4 is provided with the spraying pipe 5. The wall of the spraying pipe 5 is provided with a plurality of spraying holes. The liquid medicine in the total conveying pipe 3 is divided into each branch conveying pipe 4. The liquid medicine flows into the spraying pipe 5 from the branch conveying pipe 4 and is finally sprayed out from each spraying hole of the spraying pipe 5.

[0021] The self-cleaning spraying device of the embodiment is installed in the screen cylinder of the rotary drum screen during use. The liquid inlet 2 is communicated with the liquid supply system. The liquid provided by the liquid supply system is divided into two streams after entering the liquid inlet pipe 1 and then flows into the two delivery spraying systems. The liquid entering the delivery spraying system first enters the total delivery pipe 3, is divided into each branch delivery pipe 4 from the total delivery pipe 3, and is finally sprayed from the spraying pipe 5 connected with each branch delivery pipe 4. By reasonably arranging the positions of the spraying pipes 5, the rotary drum screen can be cleaned in all directions without dead angle. The branch delivery pipe 4 is provided with a flow regulating valve. The liquid supply amount of the corresponding spraying pipe 5 can be adjusted according to the state of each part of the rotary drum screen.

[0022] When the liquid is replaced, the pipes of the self-cleaning spraying device need to be cleaned. In some embodiments, the end of the spraying pipe 5 is provided with an on-off valve 7 to facilitate the cleaning of the pipes. Specifically, the on-off valve 7 is installed at the end of the spraying pipe 5. The on-off valve 7 is preferably a spherical valve. When the liquid is sprayed, the on-off valve 7 is in a closed state. When the pipes need to be cleaned, the on-off valve 7 is opened, which saves labor and time.

[0023] As a further embodiment, the diameter of the spraying pipe 5 is greater than the diameter of the inner passage of the on-off valve 7, and the spraying pipe 5 is connected with the on-off valve 7 through a reducing joint. Specifically, the diameter of the spraying pipe 5 is greater than the diameter of the inner passage of the on-off valve 7, and the spraying pipe 5 is connected with the on-off valve 7 through a reducing joint, which can improve the pressure in the spraying pipe 5 and improve the cleaning effect of the spraying pipe 5 during pipe cleaning.

[0024] As a preferred embodiment, please refer to Figure 1 , the total delivery pipe 3 of each delivery spraying mechanism is coaxial with the liquid inlet pipe 1, and each spraying pipe 5 is parallel to the liquid inlet pipe 1. Specifically, the total delivery pipe 3 of each delivery spraying mechanism is coaxial with the liquid inlet pipe 1 at the two ends of the liquid inlet pipe 1, which facilitates the direct entry of the liquid from the liquid inlet pipe 1 into the delivery spraying system under the pressure of the liquid supply system. In order to fully spray the rotary drum screen, the liquid inlet pipe 1 is generally arranged along the axial direction of the rotary drum screen, and each spraying pipe 5 is parallel to the liquid inlet pipe 1, which facilitates the full-range and dead-angle-free spraying of the liquid inlet pipe 1 to the rotary drum screen.

[0025] As a further embodiment, one end of the spraying pipe 5 is communicated with the branch delivery pipe 4, and the other end of the spraying pipe 5 faces the direction of the other delivery spraying mechanism.

[0026] In order to improve the stability of the delivery spraying system during operation and reduce the impact effect when the liquid enters the branch delivery pipe 4 from the total delivery pipe 3, in some embodiments, the end of the total delivery pipe 3 is provided with a 90° elbow pipe, and the end of the total delivery pipe 3 is connected with the branch delivery pipe 4 through the 90° elbow pipe.

[0027] Based on the same inventive concept as the technology in Embodiment 1, embodiments of the present application also provide a rotary drum cylinder screen comprising the self-cleaning spraying device of the rotary drum cylinder screen described in Embodiment 1.

[0028] In the description of the present application, the description of the terms "one embodiment", "an example", "a specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0029] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art, according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, can make equivalent replacement or change, which should be covered within the protection scope of the present application.

Claims

1. A self-cleaning spray device for a trommel screen, characterised in that: The device comprises a liquid inlet pipe (1) and a delivery spray mechanism, the liquid inlet pipe (1) is provided with a liquid inlet (2), both ends of the liquid inlet pipe (1) are provided with the delivery spray mechanism, the delivery spray mechanism comprises a total delivery pipe (3), a branch delivery pipe (4) and a spray pipe (5), the diameter of the total delivery pipe (3) is smaller than that of the liquid inlet pipe (1), one end of the total delivery pipe (3) is communicated with the end of the liquid inlet pipe (1) through a reducing joint, the branch delivery pipe (4) is provided with a flux adjusting valve (6), one end of each branch delivery pipe (4) is communicated with the total delivery pipe (3), the other end of each branch delivery pipe (4) is connected with the spray pipe (5), the pipe wall of the spray pipe (5) is provided with a plurality of spray holes.

2. A self-cleaning spray device for a rotary drum cylinder screen according to claim 1, characterized in that: The end of the spray pipe (5) is provided with an on-off valve (7).

3. A self-cleaning spray device for a rotary drum cylinder screen according to claim 1, characterized in that: The diameter of the spray pipe (5) is larger than that of the inner passage of the on-off valve (7) and the spray pipe (5) is connected with the on-off valve (7) through a reducing joint.

4. A self-cleaning spray device for a rotary drum cylinder screen according to claim 2, characterized in that: The total delivery pipe (3) of each delivery spray mechanism is coaxial with the liquid inlet pipe (1), and each spray pipe (5) is parallel to the liquid inlet pipe (1).

5. A self-cleaning spray device for a rotary drum cylinder screen according to claim 4, characterized in that: The end of the total delivery pipe (3) is provided with a 90° elbow pipe, and the branch delivery pipe (4) is connected with the end of the total delivery pipe (3) through the 90° elbow pipe.

6. A self-cleaning spray device for a rotary drum cylinder screen according to claim 4, characterized in that: One end of the spray pipe (5) is communicated with the branch delivery pipe (4), and the other end of the spray pipe (5) is directed to the direction of another delivery spray mechanism.

7. A trommel screen characterised in that: The device comprises the self-cleaning spray device of the rotary drum cylinder screen according to any one of claims 1-6.

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