Upper cover of pressure screen and pressure screen

Abstract

The utility model relates to the technical field of pressurized screens, in particular to an upper cover of a pressurized screen and the pressurized screen, the top end and the bottom end of the upper cover are provided with a slag outlet and a slag inlet respectively, the slag outlet and the slag inlet are communicated with the interior of the upper cover to form a slag outlet channel, and a spiral guide-out strip is arranged on the inner wall of the upper cover. The rotating direction of the spiral guide-out strip is the same as the rotating direction of a rotor of the pressure screen, light slag entering the upper cover can quickly pass through the slag outlet channel under the inertia of the light slag, and is discharged from the slag outlet, the upper cover is further provided with a flushing water pipe, and the flushing water pipe is connected with water supply equipment and flushes water into the slag outlet channel in the direction tangent to the outer circle of the upper cover. And the flushing direction is also along the rotating direction of the rotor of the pressure screen, so that the light slag in the slag discharging channel is further driven to be quickly discharged along the spiral guide-out strip.

Description

TECHNICAL FIELD

[0001] The utility model relates to pressure screen technical field, concretely relates to a pressure screen's upper cover and a pressure screen. BACKGROUND

[0002] At present, pressure screen is the most widely used screening equipment in the pulping line of domestic papermaking industry, its technology is increasingly mature, and domestic manufacturers gradually transit from the initial technology introduction to technological innovation, and make adjustment to the pressure screen from various aspects to make it more suitable for domestic papermaking enterprises.

[0003] Because there are many light and heavy impurities in the pulp, especially in the coarse screening stage of waste paper pulping, these light and heavy impurities need to be screened and discharged from the screen body as soon as possible, otherwise the screen drum is easy to be blocked and the parts are easy to be worn, which accelerates the reduction of the service life of the product. Therefore, we design and develop a conical upper cover with a spiral discharge strip, so as to accelerate the discharge of light slag and reduce the occurrence of light slag blocking the pressure screen. SUMMARY

[0004] The technical problem to be solved by the utility model is to provide a pressure screen upper cover which can quickly discharge light slag in the pressure screen and reduce screen body wear caused by untimely light slag discharge.

[0005] To solve the above technical problems, the utility model adopts the technical scheme of a pressure screen upper cover, the upper cover is a hollow right circular conical cover body, the top end and the bottom end of the upper cover are respectively provided with a slag discharge port and a slag inlet, the slag discharge port and the slag inlet are both in communication with the inside of the upper cover and form a slag discharge channel, the inner wall of the upper cover is provided with a spiral discharge strip, the two ends of the spiral discharge strip are respectively located at the slag inlet and the slag discharge port, and the rotation direction of the spiral discharge strip is the same as that of the rotor of the pressure screen, a flushing water pipe is further arranged on the upper cover, the water outlet end of the flushing water pipe extends into the slag discharge channel and flushes water into the slag discharge channel, the flushing water pipe flushes water along the rotation direction of the rotor of the pressure screen, and the water outlet direction is tangent to the outer circle of the upper cover.

[0006] The inside of the upper cover is provided with a slag discharge channel, the inner wall of the upper cover is provided with a spiral discharge strip, the flushing water pipe is connected with a water supply device, the flushing water pipe guides flushing water into the slag discharge channel, and the flushing water is flushed into the slag discharge channel along the tangent direction of the outer circle of the upper cover. Under the driving of the flushing water, the light slag entering the slag discharge channel can be quickly discharged from the slag discharge port along the spiral guide strip.

[0007] As a preferred scheme, the top end and the bottom end of the upper cover are both provided with a connecting flange, which facilitates the connection of the upper cover with the pressure screen and the slag discharge pipeline.

[0008] As a preferred scheme, the spiral discharge strip is at least two, and each spiral discharge strip is distributed along the circumference around the central axis of the upper cover.

[0009] Based on the same inventive concept, the utility model still provides a scheme: a pressure screen, including the upper cover of a pressure screen above-mentioned.

[0010] Compared with prior art, the utility model has the beneficial effects that: the upper cover is internally provided with a spiral guide-out strip, the light slag entering the slag discharge channel from the pressure screen is cooperated with the spiral guide-out strip and discharged under the guidance of the spiral guide-out strip under the action of its inertia, the upper cover is further provided with a flushing water pipe, the water outlet end of the flushing water pipe extends into the upper cover, the flushing water pipe is used in cooperation with a water supply device, the flushing water pipe flushes water along the rotation direction of the rotor of the pressure screen and the water outlet direction is tangent to the outer circle of the upper cover, further driving the light slag in the slag discharge channel to be rapidly discharged along the spiral guide-out strip. BRIEF DESCRIPTION OF DRAWINGS

[0011] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or 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 utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0012] Figure 1 It is the internal structure schematic diagram of upper cover;

[0013] Figure 2 It is the installation distribution schematic diagram of spiral guide-out strip;

[0014] In the drawing: 1, upper cover, 2, spiral guide-out strip, 3, flushing water pipe, 4, slag outlet, 5, slag inlet. DETAILED DESCRIPTION

[0015] The technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model, obviously, the described embodiments are only some embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the utility model.

[0016] The embodiment of the utility model provides an upper cover of a pressure screen, please refer to Figure 1 And Figure 2The upper cover 1 is a hollow right circular conical cover body, the top end and the bottom end of the upper cover 1 are respectively provided with a slag outlet 4 and a slag inlet 5, the slag outlet 4 and the slag inlet 5 are communicated with the inside of the upper cover 1 and form a slag discharge channel, the inner wall of the upper cover 1 is provided with a spiral guide strip 2, two ends of the spiral guide strip 2 are respectively located at the slag inlet 5 and the slag outlet 4, and the rotation direction of the spiral guide strip 2 is the same as that of the rotor of the pressure screen, and the upper cover 1 is further provided with a flushing water pipe 3, the water outlet end of the flushing water pipe 3 extends into the slag discharge channel and flushes water into the slag discharge channel, the flushing water pipe 3 flushes water along the rotation direction of the rotor of the pressure screen and the water outlet direction is tangent to the outer circle of the upper cover 1.

[0017] Specifically, the upper cover 1 is a right circular conical cover body structure, the inside of the upper cover 1 is a conical cavity, the bottom end of the upper cover 1 is provided with a slag inlet 5, and the top end of the upper cover 1 is provided with a slag outlet 4, the slag inlet 5 and the slag outlet 4 are communicated with the inside of the upper cover 1, and the inside of the upper cover 1 forms a slag discharge channel. The inner wall of the upper cover 1 is provided with a spiral guide strip 2, one end of the spiral guide strip 2 is located at the slag outlet 4, and the other end is located at the slag inlet 5, the spiral guide strip 2 is connected with the inner wall of the upper cover 1 and spirally arranged around the central axis of the upper cover 1, and the rotation direction of the spiral guide strip 2 is the same as that of the rotor of the pressure screen, and the light slag entering the slag discharge channel under the centrifugal force of the pressure screen is discharged from the slag discharge channel under the self inertia and the guidance of the spiral guide strip.

[0018] The flushing water pipe 3 is arranged on the upper cover 1, the water outlet end of the flushing water pipe 3 extends into the inside of the upper cover 1, the flushing water pipe 3 is used for being connected with a flushing water supply device and guiding flushing water into the slag discharge channel, the water outlet direction of the flushing water pipe 3 is along the rotation direction of the rotor of the pressure screen and is tangent to the outer circle of the upper cover 1, and the flushing water enters the slag discharge channel and drives the light slag to move along the spiral guide strip to the slag outlet 4.

[0019] The upper cover 1 of the embodiment is provided with the spiral guide strip and the flushing water pipe 3, the flushing water pipe 3 flushes flushing water into the slag discharge channel along the specified direction after being connected with the water supply device, and the flushing water cooperates with the spiral guide strip to make the light slag quickly pass through the slag discharge channel and be discharged, thereby effectively avoiding the screen body abrasion caused by the light slag not being discharged in time.

[0020] In some embodiments, the top end and the bottom end of the upper cover 1 are both provided with a connecting flange. The connecting flange at the top end of the upper cover 1 is used for connecting the upper cover 1 with a slag discharge pipe and other devices, thereby facilitating the treatment of the light slag, and the connecting flange at the bottom end of the upper cover 1 is used for connecting the upper cover 1 with the pressure screen.

[0021] In some embodiments, the spiral guide strip is at least two, and each spiral guide strip is distributed along the circumference around the central axis of the upper cover 1. The spiral guide strip is preferably two or more, and each spiral guide strip is distributed along the axis around the central axis of the upper cover 1, and the light slag entering the slag discharge channel quickly passes through the slag discharge channel under the guidance of the adjacent spiral guide strip.

[0022] Based on the same inventive concept, the utility model also provides an embodiment, which is a pressure screen, comprising the upper cover 1 described in embodiment 1, the upper cover 1 is installed at the slag outlet 4 of the pressure screen and quickly guides the light slag in the pressure screen to export.

[0023] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the present specification, 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.

[0024] The above is only the preferred specific implementation of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model.

Claims

1. An upper cover for a pressure screen, characterized by: The upper cover (1) is a hollow right circular conical cover body, the top end and the bottom end of the upper cover (1) are respectively provided with a slag outlet (4) and a slag inlet (5), the slag outlet (4) and the slag inlet (5) are in communication with the inside of the upper cover (1) and form a slag channel, the inner wall of the upper cover (1) is provided with a spiral guide-out strip (2), the two ends of the spiral guide-out strip (2) are respectively located at the slag inlet (5) and the slag outlet (4), and the spiral direction of the spiral guide-out strip (2) is the same as the spiral direction of the rotor of the pressure screen, the upper cover (1) is further provided with a flushing water pipe (3), the water outlet end of the flushing water pipe (3) extends into the slag channel and flushes water into the slag channel, the flushing water pipe (3) flushes water along the spiral direction of the rotor of the pressure screen, and the water outlet direction is tangent to the outer circle of the upper cover (1).

2. A top cover for a pressure screen according to claim 1, characterized in that: The top end and the bottom end of the upper cover (1) are both provided with a connecting flange.

3. A top cover for a pressure screen according to claim 1, characterized in that: The spiral guide-out strip is at least two, and each spiral guide-out strip is distributed in the circumferential direction around the central axis of the upper cover (1).

4. A pressure screen, characterized by: The upper cover of the pressure screen comprises any one of claims 1-3.

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