A wear-resistant sealing pressure screen and pressure screen upper cover

Abstract

The present invention discloses a wear-resistant sealed pressure screen and a pressure screen upper cover. The pressure screen comprises an upper cover, a cylinder and a screen drum. The upper cover is provided with an upper cover flange, a light residue pipe and a dilution water pipe. The cylinder is provided with a cylinder flange, and the screen drum is provided with a screen drum flange. The upper cover flange is connected to the cylinder flange, and the cylinder flange is connected to the screen drum flange. An upper cover flange protection structure is provided between the inner wall of the upper cover and the screen drum flange, and a cylinder flange protection structure is provided between the screen drum flange and the upper cover flange. The pressure screen upper cover sets the light residue pipe as a horizontal pipe, and sets the inlet of the dilution water pipe along the tangent direction of the upper cover, and the guide plate extends into the light residue bend pipe, which accelerates the removal of light residue impurities and slows down the wear rate. In addition, the upper cover flange protection structure prevents the slurry from contacting the upper cover flange, and the lower plane of the upper cover flange is lower than the upper plane of the screen drum flange, and the outer circle of the screen drum flange forms a close fit with the upper cover flange, which can avoid the contact between the cylinder flange and the slurry, protect the sealing groove from wear, and extend the service life of the super screen cylinder.

Description

Technical Field

[0001] The invention belongs to the technical field of waste paper processing equipment, and particularly relates to a wear-resistant sealed pressure screen and a pressure screen upper cover. Background Art

[0002] In the currently widely used super screen equipment, light residue impurities in the pulp are removed from the upper cover. The existing upper cover structure is as follows: Figure 3 and 4 As shown, the assembly diagram of the upper cover, cylinder and screen drum is as shown in Figure 1 and 2 As shown, the pulp rotates in the upper cover and hits the inner wall and flange of the upper cover. The pulp also impacts the cylinder flange. The upper cover flange and the cylinder flange are easily worn out after long-term use, and the overall service life is short. Summary of the Invention

[0003] In view of the above-mentioned deficiencies in the prior art, the present invention provides a wear-resistant sealed pressure screen and a pressure screen upper cover.

[0004] The technical solution adopted in the present invention is:

[0005] A wear-resistant sealed pressure screen comprises an upper cover, a cylinder and a screen drum. The upper cover is provided with an upper cover flange, a light residue pipe and a dilution water pipe. The cylinder is provided with a cylinder flange and the screen drum is provided with a screen drum flange. The upper cover flange is connected to the cylinder flange, which is connected to the screen drum flange. An upper cover flange protection structure is provided between the inner wall of the upper cover and the screen drum flange, and a cylinder flange protection structure is provided between the screen drum flange and the upper cover flange. The protection structure is provided to prevent the pulp from directly contacting and rubbing with the upper cover flange or the cylinder flange, thereby extending the service life.

[0006] As a preferred solution of the present invention, the inner wall of the upper cover is provided with a guide plate, the guide plate is provided with a shielding portion, the outer wall of the shielding portion is connected to the inner wall of the upper cover flange, and the bottom surface of the shielding portion is close to the bottom of the upper cover flange, the lower end surface of the upper cover flange is lower than the upper end surface of the sieve drum flange, the shielding portion and the sieve drum flange constitute an upper cover flange protection structure, the shielding portion and the sieve drum flange shield the upper cover flange to prevent light slag from contacting it.

[0007] As a preferred solution of the present invention, the upper end face of the sieve drum flange is higher than the upper end face of the cylinder flange, and the outer circumferential wall of the sieve drum flange is tightly matched with the inner wall of the upper cover flange, the outer circumferential wall of the sieve drum flange and the inner wall of the upper cover flange constitute a cylinder flange protection structure, the upper end face of the sieve drum flange is higher than the upper end face of the cylinder flange, the lower end face of the upper cover flange is lower than the upper end face of the sieve drum flange, and the outer circumferential wall of the raised part of the sieve drum flange is in close contact with the inner wall of the upper cover flange, which makes the cylinder flange wrapped in the protection structure formed by the sieve drum flange and the upper cover flange, and the light slag cannot touch the cylinder flange, thereby avoiding wear of the cylinder flange.

[0008] As a preferred solution of the present invention, a sealing ring is provided at the contact point between the upper cover flange and the cylinder flange, and a sealing groove is provided on the cylinder flange. The sealing ring is installed in the sealing groove and is sealed with the upper cover flange to further prevent the slurry from contacting the cylinder flange. Moreover, the cylinder flange protection structure formed by the screen drum flange and the upper cover flange can also protect the sealing groove and extend the service life of the cylinder.

[0009] As a preferred solution of the present invention, the upper end of the guide plate extends into the light residue pipe of the upper cover. The extended guide plate can prevent the gap between the cylinder and the upper cover from being easily worn out by the vortex, and the guide pipe is arranged along the tangential rotation of the light residue pipe, which has a pulp gathering effect on the pulp, accelerates the outflow of the slurry, slows down the rotation and effectively improves the use of the upper cover component.

[0010] As a preferred solution of the present invention, the light slag pipe includes a light slag elbow and a horizontal pipe, and the horizontal pipe is connected to the light slag outlet of the upper cover through the light slag elbow.

[0011] As a preferred solution of the present invention, the injection direction of the dilution water pipe is the tangential direction of the inner wall of the upper cover. Combining the horizontal pipe and the light slag bend pipe and the dilution water entering along the tangential direction can enhance the flushing effect.

[0012] The present invention also provides a pressure screen upper cover, including an upper cover, the upper cover is provided with an upper cover flange, a light slag pipe and a dilution water pipe, the inner wall of the upper cover is provided with a guide plate, the light slag pipe includes a light slag bend pipe and a horizontal pipe, the horizontal pipe is connected with the light slag outlet of the upper cover through the light slag bend pipe, the upper part of the guide plate extends into the light slag bend pipe and the lower part of the guide plate is provided with a shielding part, the outer wall of the shielding part is connected to the inner wall of the upper cover flange and the injection direction of the dilution water pipe is the tangent direction of the inner wall of the upper cover, the dilution water pipe enters along the tangent direction to enhance the flushing effect and accelerate the discharge of the slurry.

[0013] The present invention sets the light slag pipe as a horizontal pipe and connects it to the upper cover through a bend, and sets the water inlet of the dilution water pipe to the tangential direction of the upper cover, and the guide plate is extended to extend into the light slag bend, which can speed up the removal of light slag impurities and slow down the wear rate, and the shielding part of the upper cover flange and the guide plate constitutes a protective structure of the upper cover flange, the slurry will not contact the upper cover flange, and the lower plane of the upper cover flange is lower than the upper plane of the screen drum flange, and the outer circle of the screen drum flange forms a tight fit with the upper cover flange, which can avoid the cylinder flange from contacting the slurry, protect the sealing groove from wear, and extend the service life of the super screen cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 It is a structural diagram of a pressure screen in the prior art.

[0016] Figure 2 for Figure 1 A partial enlarged view of part A.

[0017] Figure 3 It is a structural schematic diagram of the pressure screen upper cover in the prior art.

[0018] Figure 4 for Figure 3 Middle AA section view.

[0019] Figure 5 It is a structural schematic diagram of the pressure screen of the present invention.

[0020] Figure 6 for Figure 5 A partial enlarged view of part B.

[0021] Figure 7 It is a structural schematic diagram of the pressure screen upper cover of the present invention.

[0022] Figure 8 for Figure 7 Middle BB cross-section view. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0024] Example 1:

[0025] A wear-resistant sealed pressure screen, such as Figure 5 and 6 As shown, it includes an upper cover 1, a cylinder 2 and a screen drum 3. Figure 7 and 8 As shown, the upper cover 1 is provided with an upper cover flange 11 , a light slag pipe 13 and a dilution water pipe 14 . The light slag pipe 13 includes a light slag elbow 131 and a horizontal pipe 132 . The horizontal pipe 132 is connected to the light slag outlet of the upper cover via the light slag elbow 131 .

[0026] The injection direction of the dilution water pipe 14 is the tangential direction of the inner wall of the upper cover. Combining the horizontal pipe and the light slag bend pipe and the dilution water entering along the tangential direction can enhance the flushing effect.

[0027] The cylinder 2 is provided with a cylinder flange 21, and the sieve drum 3 is provided with a sieve drum flange 31; the upper cover flange 11 and the cylinder flange 21 are fixedly connected by bolts, and a sealing ring is provided at the contact point between the upper cover flange 11 and the cylinder flange, and a sealing groove is provided on the cylinder flange. The sealing ring is installed in the sealing groove and is sealed with the upper cover flange.

[0028] The cylinder flange 21 and the screen drum flange 31 are fixedly connected by bolts, and an upper cover flange protection structure is provided between the inner wall of the upper cover 1 and the screen drum flange 31. Specifically, the inner wall of the upper cover 1 is provided with a guide plate 12, and the upper end of the guide plate 12 extends into the light residue pipe 13 of the upper cover. The guide plate 12 is provided with a shielding portion 121, and the outer wall of the shielding portion 121 is connected to the inner wall of the upper cover flange 11, and the bottom surface of the shielding portion 121 is close to the bottom of the upper cover flange 11, and the lower end surface of the upper cover flange is lower than the upper end surface of the screen drum flange. The shielding portion 121 and the screen drum flange 31 constitute an upper cover flange protection structure, and the shielding portion and the screen drum flange shield the upper cover flange to prevent light residue from contacting it. The extended guide plate can prevent the gap between the cylinder and the upper cover from being easily worn through by the vortex, and the guide pipe is arranged along the tangential rotation of the light residue pipe, which has a pulping effect on the pulp, accelerates the outflow of slurry, and slows down the rotation.

[0029] A cylinder flange protection structure is provided between the sieve drum flange 31 and the upper cover flange 11. Specifically, the upper end face of the sieve drum flange 31 is higher than the upper end face of the cylinder flange 21, and the outer circumferential wall of the sieve drum flange 31 is tightly matched with the inner wall of the upper cover flange 11. The outer circumferential wall of the sieve drum flange 31 and the inner wall of the upper cover flange constitute the cylinder flange protection structure. The upper end face of the sieve drum flange is higher than the upper end face of the cylinder flange, and the lower end face of the upper cover flange is lower than the upper end face of the sieve drum flange, and the outer circumferential wall of the raised part of the sieve drum flange is in close contact with the inner wall of the upper cover flange. This makes the cylinder flange wrapped in the protection structure formed by the sieve drum flange and the upper cover flange, and the light slag cannot touch the cylinder flange, thereby avoiding wear of the cylinder flange.

[0030] Example 2:

[0031] A pressure screen cover, such as Figure 7 and 8As shown, it includes an upper cover 1, which is provided with an upper cover flange 11, a light slag pipe 13 and a dilution water pipe 14. The inner wall of the upper cover 1 is provided with a guide plate 12, and the light slag pipe 13 includes a light slag bend pipe 131 and a horizontal pipe 132. The horizontal pipe 132 is connected to the light slag outlet of the upper cover through the light slag bend pipe 131. The upper part of the guide plate 12 extends into the light slag bend pipe 131 and the lower part of the guide plate 12 is provided with a shielding part 121. The outer wall of the shielding part 121 is connected to the inner wall of the upper cover flange 11 and the injection direction of the dilution water pipe 14 is the tangential direction of the inner wall of the upper cover. The dilution water pipe enters along the tangential direction to enhance the flushing effect and accelerate the discharge of the slurry.

[0032] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0033] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A wear-resistant sealed pressure screen, comprising an upper cover (1), a cylinder (2) and a screen drum (3), wherein the upper cover (1) is provided with an upper cover flange (11), a light residue pipe (13) and a dilution water pipe (14), the cylinder (2) is provided with a cylinder flange (21), and the screen drum (3) is provided with a screen drum flange (31); the upper cover flange (11) is connected to the cylinder flange (21), and the cylinder flange (21) is connected to the screen drum flange (31), characterized in that: An upper cover flange protection structure is provided between the inner wall of the upper cover (1) and the screen drum flange (31), and a cylinder flange protection structure is provided between the screen drum flange (31) and the upper cover flange (11); the light slag pipe (13) comprises a light slag elbow pipe (131) and a horizontal pipe (132), and the horizontal pipe (132) is connected to the light slag outlet of the upper cover via the light slag elbow pipe (131); A guide plate (12) is provided on the inner wall of the upper cover (1), the upper part of the guide plate extends into the light slag bend pipe and a shielding portion is provided on the lower part of the guide plate, the outer wall of the shielding portion (121) is connected to the inner wall of the upper cover flange (11), and the bottom surface of the shielding portion (121) is close to the bottom of the upper cover flange (11), the lower end surface of the upper cover flange is lower than the upper end surface of the sieve drum flange, and the shielding portion (121) and the sieve drum flange (31) form an upper cover flange protection structure; the upper end surface of the sieve drum flange (31) is higher than the upper end surface of the cylinder flange (21), and the outer circumferential wall of the sieve drum flange (31) is tightly matched with the inner wall of the upper cover flange (11), and the outer circumferential wall of the sieve drum flange (31) and the inner wall of the upper cover flange form a cylinder flange protection structure.

2. The wear-resistant sealing pressure screen according to claim 1, characterized in that: A sealing ring is provided at the contact point between the upper cover flange (11) and the cylinder flange.

3. The wear-resistant sealing pressure screen according to claim 1, characterized in that: The injection direction of the dilution water pipe (14) is the tangent direction of the inner wall of the upper cover.

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