Pulp pressurized screen

Abstract

The utility model belongs to the technical field of paper manufacturing, and particularly relates to a paper pulp pressurized screen which comprises a base, a screen barrel is arranged above the base, a screen drum is arranged in the screen barrel, a stirring structure is rotatably arranged in the screen drum, and the stirring structure is in contact with the inner wall of the screen drum. The cover body is arranged at the top of the screen barrel, and the inner wall of the cover body is connected with the top end of the screen drum; a discharging pipe, a feeding pipe and a pulp outlet pipe, the discharging pipe and the feeding pipe are arranged on the outer wall of the screening barrel, the feeding pipe is arranged above the discharging pipe, and the pulp outlet pipe is arranged at the top of the cover body and used for discharging paper pulp; the cleaning structure is rotationally arranged in the screen barrel and makes contact with the outer wall of the screen drum. And the effects of cleaning the outer wall of the screen cylinder and improving the filtering efficiency of the screen cylinder when the equipment works are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of paper manufacturing, and in particular relates to a pulp pressure screen. Background Art

[0002] Pulp is made from certain plants and is the basic raw material for papermaking. Pressure screens are used during the processing of pulp. Pressure screens are often used to screen and grade pulp and are suitable for a variety of pulps. Therefore, it can be said that pressure screens are one of the indispensable equipment in papermaking equipment.

[0003] Chinese utility model patent CN219430384U discloses a pulp pressure screen, comprising a base, on which a screen barrel and a motor are arranged, the screen barrel comprising a barrel body and a barrel cover, the barrel body and the barrel cover are detachably connected, a pulp inlet pipe for passing pulp, a pulp outlet pipe for passing pulp, and a heavy residue outlet pipe for removing impurities are arranged on the side wall of the barrel body, a screen drum and a rotor driven by a motor are arranged in the barrel body, a plurality of screen holes are evenly spaced on the screen drum, the rotor is arranged on the inner side of the screen drum, a rotor facing the screen drum is arranged on the rotor, a spray mechanism for discharging water toward the screen drum is arranged on the side of the barrel cover facing the barrel body, pulp enters the screen barrel through the pulp inlet pipe, the rotor cooperates with the screen drum to filter and screen the pulp, and the pulp that has passed the initial screening can be discharged from the pulp outlet pipe, and the spray mechanism arranged on the barrel cover can spray and rinse the screen drum when the work stops, so as to clean the impurities adhering to the screen drum.

[0004] The pulp is filtered through the screen drum to separate the pulp from impurities. The impurities on the outer wall of the screen drum can only be washed away by the spray structure after the work is completed. However, during the operation of the pressure screen, the impurities in the pulp adhere to the screen drum, which will affect the screening efficiency of the device. Utility Model Content

[0005] The purpose of the utility model is to provide a pulp pressure screen in view of the above-mentioned technical problems, so as to achieve the effect of cleaning the outer wall of the screen drum when the equipment is working, thereby improving the filtering efficiency of the screen drum.

[0006] In view of this, the utility model provides a pulp pressure screen, characterized in that it includes:

[0007] A base, wherein a sieve barrel is arranged above the base, a sieve drum is arranged inside the sieve barrel, a stirring structure is arranged inside the sieve drum for rotation, and the stirring structure is in contact with the inner wall of the sieve drum;

[0008] A cover body, wherein the cover body is arranged on the top of the screen drum, and the inner wall of the cover body is connected to the top of the screen drum;

[0009] A discharge pipe, a feed pipe, and a pulp discharge pipe, wherein the discharge pipe and the feed pipe are respectively arranged on the outer wall of the screen barrel, and the feed pipe is arranged above the discharge pipe, and the pulp discharge pipe is arranged on the top of the cover body to discharge the pulp;

[0010] The cleaning structure is rotatably arranged inside the screen barrel and contacts the outer wall of the screen drum.

[0011] In the present technical solution, pulp is transported to the screen drum through a feed pipe, and the pulp is separated from impurities through the cooperation between the stirring structure and the screen drum, and the filtered pulp is discharged from the screen drum through a pulp outlet pipe. During the processing, the impurities adhered to the outer wall of the screen drum can be cleaned by rotating the cleaning structure, which is beneficial to improving the filtering efficiency of the screen drum.

[0012] In the above technical solution, further, the cleaning structure includes:

[0013] A cavity, wherein the cavity is arranged below the base, and a first motor is arranged above the base, and an output shaft of the first motor passes through the base and extends into the cavity;

[0014] A rotating shaft, the rotating shaft passes through the base and the bottom surface of the screen barrel, and a horizontal plate is fixedly arranged on the upper end surface of the rotating shaft;

[0015] A first pulley and a second pulley, wherein the first pulley and the second pulley are respectively arranged on the output shaft of the first motor and the rotating shaft, and a transmission belt is sleeved on the first pulley and the second pulley;

[0016] The vertical rods are symmetrically arranged above the horizontal plate, and brushes are arranged on the sides of the vertical rods close to the outer wall of the screen drum, and a quick-release structure is arranged between the brushes and the vertical rods.

[0017] In the present technical solution, the first motor drives the first pulley to rotate, so that the transmission belt drives the second pulley and the rotating shaft to rotate. The rotating shaft can rotate the horizontal plate and the vertical plate, so that the brush can rotate. The rotating brush can contact the outer wall of the screen drum, thereby achieving the effect of cleaning the outer wall of the screen drum and improving the efficiency of pulp filtration.

[0018] In the above technical solution, further, the quick-release structure includes:

[0019] The air avoidance groove is symmetrically arranged on the side of the vertical rod close to the screen drum, and a chute is arranged below the air avoidance groove, and a channel is arranged on the side of the chute close to the brush;

[0020] A card block, which is fixedly arranged on the back of the brush in a "convex" shape, and the narrow end of the card block is slidably arranged in the channel;

[0021] A fixing plate, which is arranged on the top of the brush and extends to the top of the vertical rod, and the fixing plate is fixed to the top of the vertical rod by screws;

[0022] The pushing structure is arranged below the slide slot and is used to push the card block out of the slide slot.

[0023] In the present technical solution, the card block is placed in the air avoidance groove and the brush is pushed downward so that the narrow end of the card block slides into the channel, and the fixing plate and the top of the vertical plate are locked by screws to fix the brush. When removing the brush, the screws are unscrewed and the card block can be pushed out of the slide groove through the set pushing structure, which is convenient for maintenance personnel to replace the brush and helps to improve maintenance efficiency.

[0024] In the above technical solution, further, the push-out structure includes:

[0025] A lifting slot, which is arranged at the bottom of the slide slot, and the width of the lifting slot is greater than the width of the slide slot;

[0026] A lifting block, wherein the lifting block is slidably arranged in the lifting slot and is slidably connected to the lifting slot. Ear plates are symmetrically arranged at the bottom of the lifting block, and the ear plates are used to limit the moving distance of the lifting block;

[0027] A spring is arranged between the bottom surface of the lifting block and the bottom surface of the lifting slot to push the lifting block to move.

[0028] In the technical solution, the block can be pushed out of the slide slot through the cooperation among the spring, the lifting block, the lifting slot and the ear plate, so that it is convenient for maintenance personnel to replace the brush, which is beneficial to improving the efficiency of maintenance.

[0029] In the above technical solution, further, inclined surfaces are provided on both sides of the channel close to the air avoidance groove.

[0030] In the technical solution, the symmetrically arranged inclined surfaces can facilitate the narrow end of the card block to enter the channel, which is beneficial to improving the efficiency of installation.

[0031] In the above technical solution, further, the cover body and the screen barrel and the cover body and the top of the screen drum are connected by bolts, and lifting structures are provided on both sides of the cover body.

[0032] In the above technical solution, further, the lifting structure includes:

[0033] A shell, wherein the shell is symmetrically arranged on both sides of the screen barrel and is provided with an opening away from the side of the screen barrel;

[0034] A guide rod and a lifting screw rod, wherein the guide rod and the lifting screw rod are respectively arranged in the housing on both sides, and the lifting screw rod passes through the bottom surface of the housing and the base;

[0035] A second motor, which is arranged below the housing and whose output shaft is connected to the lower end face of the lifting screw rod;

[0036] A lifting plate, which is in a "C" shape, with its top fixedly connected to the cover body and its lower end slidably arranged in the housing;

[0037] Wherein, both the lifting screw rod and the guide rod penetrate through the lower end of the lifting plate, and the bidirectional screw rod is threadedly connected to the lifting plate.

[0038] In this technical solution, by removing the bolts fixing the cover body, driving the second motor to drive the lifting screw rod to rotate, and through the cooperation of the guide rod, the cover body can drive the sieve drum to move upward together, facilitating maintenance personnel to maintain the inside of the sieve barrel.

[0039] The beneficial effects of the present utility model are:

[0040] 1. Pulp is conveyed to the sieve barrel through the feed pipe. Through the cooperation between the stirring structure and the sieve drum, the pulp is separated from impurities, and the filtered pulp is discharged from the sieve barrel through the pulp outlet pipe. During the processing, through the rotationally arranged cleaning structure, the impurities adhered to the outer wall of the sieve drum can be cleaned, which is beneficial to improving the filtering efficiency of the sieve drum.

[0041] 2. By placing the block in the clearance groove and pushing the brush downward, the narrow end of the block slides into the channel, and the fixing plate and the top of the vertical plate are locked by screws to fix the brush. When removing the brush, unscrew the screws, and through the arranged pushing structure, the block can be pushed out of the chute, facilitating the maintenance personnel to replace the brush and being beneficial to improving the maintenance efficiency.

[0042] 3. By removing the bolts fixing the cover body, driving the second motor to drive the lifting screw rod to rotate, and through the cooperation of the guide rod, the cover body can drive the sieve drum to move upward together, facilitating maintenance personnel to maintain the inside of the sieve barrel. Description of the Drawings

[0043] Figure 1 is the three-dimensional schematic diagram of the present utility model;

[0044] Figure 2 is the three-dimensional sectional view of the present utility model;

[0045] Figure 3 is the sectional view of the present utility model;

[0046] Figure 4 is the present utility model Figure 2 the enlarged view of area A;

[0047] Figure 5 is the partial exploded view of the quick-release structure of the present utility model;

[0048] Figure 6 It is a schematic diagram of the quick-disassembly structure of the utility model;

[0049] The symbols in the figure are:

[0050] 1. Base; 2. Screen barrel; 3. Cover; 4. Discharge pipe; 5. Feed pipe; 6. Slurry discharge pipe; 7. Stirring structure; 701. Drive motor; 702. Stirring shaft; 703. Stirring rod; 704. Fin plate; 8. Cleaning structure; 801. Cavity; 802. First motor; 803. Rotating shaft; 804. First pulley; 805. Second pulley; 806. Transmission belt; 807. Horizontal plate; 808. Vertical rod; 809. Brush; 9. , quick-release structure; 901, air avoidance groove; 902, slide groove; 903, channel; 904, block; 10, ejection structure; 1001, lifting groove; 1002, lifting block; 1003, ear plate; 1004, spring; 11, screen drum; 12, inclined surface; 13, lifting structure; 1301, shell; 1302, opening; 1303, guide rod; 1304, lifting screw rod; 1305, lifting plate; 1306, second motor. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0052] In the description of the present application, it should be noted that the terms used here are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0053] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0054] It should be noted that, in the description of the present application, the orientation or positional relationship indicated by terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the orientation words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0055] It should be noted that, in the present application, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0056] Embodiment 1:

[0057] Depend on Figure 1-Figure 4As shown, this embodiment provides a pulp pressure screen, including: a base 1, a screen barrel 2 is arranged above the base 1, a screen drum 11 is arranged inside the screen barrel 2, a stirring structure 7 is rotatably arranged inside the screen drum 11, and the stirring structure 7 is in contact with the inner wall of the screen drum 11; a cover body 3, the cover body 3 is arranged on the top of the screen barrel 2, and the inner wall of the cover body 3 is connected to the top of the screen drum 11; a discharge pipe 4, a feed pipe 5, and a pulp discharge pipe 6, the discharge pipe 4 and the feed pipe 5 are respectively arranged on the outer wall of the screen barrel 2, and the feed pipe 5 is arranged above the discharge pipe 4, and the pulp discharge pipe 6 is arranged on the top of the cover body 3 for discharging pulp; a cleaning structure 8, the cleaning structure 8 is rotatably arranged inside the screen barrel 2 and in contact with the outer wall of the screen drum 11. Among them, the stirring structure 7 includes a stirring shaft 702 rotatably arranged in the screen drum 11, a driving motor 701 is arranged on the top of the stirring shaft 702, and the driving motor 701 is installed on the top surface of the cover body 3, and a plurality of stirring rods 703 are staggered on the outer wall of the stirring shaft 702, and a fin plate 704 is arranged on the outer end surface of the stirring rod 703, and the fin plate 704 is in contact with the inner wall of the screen drum 11.

[0058] The pulp is transported to the screen barrel 2 through the feed pipe 5, and the stirring shaft 702 is driven by the driving motor 701 to drive the stirring rod 703 and the fin plate 704 to rotate, so that the fin plate 704 cooperates with the screen drum 11 to separate the pulp from impurities, and the filtered pulp is discharged from the screen barrel 2 through the pulp outlet pipe 6. During the processing, the impurities adhered to the outer wall of the screen drum 11 can be cleaned by rotating the cleaning structure 8, which is beneficial to improving the filtration efficiency of the screen drum 11.

[0059] Furthermore, the cleaning structure 8 includes: a cavity 801, which is arranged below the base 1, and a first motor 802 is arranged above the base 1, and the output shaft of the first motor 802 passes through the base 1 and extends into the cavity 801; a rotating shaft 803, which passes through the base 1 and the bottom surface of the screen barrel 2, and a horizontal plate 807 is fixedly arranged on the upper end surface of the rotating shaft 803; a first pulley 804 and a second pulley 805, which are respectively arranged on the output shaft of the first motor 802 and the rotating shaft 803, and a transmission belt 806 is sleeved on the first pulley 804 and the second pulley 805; a vertical rod 808, which is symmetrically arranged above the horizontal plate 807, and a brush 809 is arranged on the vertical rod 808 near the outer wall side of the screen drum 11, and a quick-release structure 9 is arranged between the brush 809 and the vertical rod 808.

[0060] The first motor 802 drives the first pulley 804 to rotate, so that the transmission belt 806 drives the second pulley 805 and the rotating shaft 803 to rotate. The rotating shaft 803 can rotate the horizontal plate 807 and the vertical plate, so that the brush 809 rotates. The rotating brush 809 can contact the outer wall of the screen drum 11, thereby achieving the effect of cleaning the outer wall of the screen drum 11 and improving the efficiency of pulp filtration.

[0061] Embodiment 2:

[0062] Depend on Figure 1-Figure 6 As shown, this embodiment provides a pulp pressure screen, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0063] Furthermore, the quick-release structure 9 includes: an air avoidance groove 901, which is symmetrically arranged on the side of the vertical rod 808 close to the screen drum 11, and a slide groove 902 is arranged below the air avoidance groove 901, and a channel 903 is arranged on the side of the slide groove 902 close to the brush 809; a clamping block 904, which is fixedly arranged on the back of the brush 809 and is a "convex" type arrangement, and the narrow end of the clamping block 904 is slidably arranged in the channel 903; a fixed plate, which is arranged on the top of the brush 809 and extends to the top of the vertical rod 808, and the fixed plate is fixed to the top of the vertical rod 808 by screws; a pushing structure 10, which is arranged below the slide groove 902, and is used to push the clamping block 904 out of the slide groove 902.

[0064] By placing the block 904 in the air avoidance groove 901 and pushing the brush 809 downward, the narrow end of the block 904 slides into the channel 903, and the fixing plate and the top of the vertical plate are locked by screws to fix the brush 809. When removing the brush 809, the screws are unscrewed, and the block 904 can be pushed out of the slide groove 902 through the set pushing structure 10, which is convenient for maintenance personnel to replace the brush 809, which is beneficial to improving maintenance efficiency.

[0065] Furthermore, the ejection structure 10 includes: a lifting groove 1001, which is arranged at the bottom of the slide groove 902, and the width of the lifting groove 1001 is greater than the width of the slide groove 902; a lifting block 1002, which is slidably arranged in the lifting groove 1001 and is slidably connected to the lifting groove 1001, and the bottom of the lifting block 1002 is symmetrically provided with ear plates 1003, and the ear plates 1003 are used to limit the moving distance of the lifting block 1002; a spring 1004, which is arranged between the bottom surface of the lifting block 1002 and the bottom surface of the lifting groove 1001, and is used to push the lifting block 1002 to move.

[0066] Through the cooperation among the spring 1004, the lifting block 1002, the lifting groove 1001, and the ear plate 1003, the clamping block 904 can be pushed out of the sliding groove 902, which is convenient for maintenance personnel to replace the brush 809 and is conducive to improving the maintenance efficiency.

[0067] Further, inclined surfaces 12 are provided on both sides of the channel 903 close to the clearance groove 901.

[0068] The symmetrically arranged inclined surfaces 12 can facilitate the entry of the narrow end of the clamping block 904 into the channel 903, which is conducive to improving the installation efficiency.

[0069] Embodiment III:

[0070] As Figure 1-Figure 4 shown, this embodiment provides a pulp pressure screen. In addition to including the technical solutions of the above embodiments, it also has the following technical features.

[0071] Further, between the cover body 3 and the screen barrel 2 and at the top of the cover body 3 and the screen drum 11 are both connected by bolts, and lifting structures 13 are provided on both sides of the cover body 3. The lifting structure 13 includes: a housing 1301, which is symmetrically arranged on both sides of the screen barrel 2 and has an opening 1302 on the side far from the screen barrel 2; a guide rod 1303 and a lifting screw rod 1304, which are respectively arranged in the housings 1301 on both sides, and the lifting screw rod 1304 penetrates the bottom surface of the housing 1301 and is connected to the base 1; a second motor 1306, which is arranged below the housing 1301 and the output shaft is connected to the lower end surface of the lifting screw rod 1304; a lifting plate 1305, which is in an "L" shape, and the top is fixedly connected to the cover body 3, and the lower end is slidably arranged in the housing 1301; wherein, both the lifting screw rod 1304 and the guide rod 1303 penetrate the lower end of the lifting plate 1305, and the bidirectional screw rod is threadedly connected with the lifting plate 1305.

[0072] By removing the bolts fixing the cover body 3, driving the second motor 1306 to drive the lifting screw rod 1304 to rotate, and through the cooperation of the guide rod 1303, the cover body 3 can drive the screen drum 11 to move upward together, which is convenient for maintenance personnel to maintain the inside of the screen barrel 2.

[0073] The embodiments of the present application have been described above in conjunction with the accompanying drawings. Without conflict, the embodiments and the features in the embodiments in the present application can be combined with each other. The present application is not limited to the above specific embodiments. The above specific embodiments are only illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all belong to the protection scope of the present application.

Claims

1. A pulp pressure screen, characterized in that ,include: A base (1), a sieve barrel (2) is arranged above the base (1), a sieve drum (11) is arranged inside the sieve barrel (2), a stirring structure (7) is rotatably arranged inside the sieve drum (11), and the stirring structure (7) is in contact with the inner wall of the sieve drum (11); A cover body (3), wherein the cover body (3) is arranged on the top of the sieve barrel (2), and the inner wall of the cover body (3) is connected to the top of the sieve drum (11); A discharge pipe (4), a feed pipe (5), and a pulp discharge pipe (6), wherein the discharge pipe (4) and the feed pipe (5) are respectively arranged on the outer wall of the screen barrel (2), and the feed pipe (5) is arranged above the discharge pipe (4), and the pulp discharge pipe (6) is arranged on the top of the cover body (3) for discharging pulp; A cleaning structure (8) is rotatably arranged inside the screen barrel (2) and in contact with the outer wall of the screen drum (11).

2. A pulp pressure screen according to claim 1, characterized in that: The cleaning structure (8) comprises: A cavity (801), wherein the cavity (801) is arranged below the base (1), and a first motor (802) is arranged above the base (1), and an output shaft of the first motor (802) passes through the base (1) and extends into the cavity (801); A rotating shaft (803), wherein the rotating shaft (803) passes through the base (1) and the bottom surface of the sieve barrel (2), and a horizontal plate (807) is fixedly provided on the upper end surface of the rotating shaft (803); A first pulley (804) and a second pulley (805), wherein the first pulley (804) and the second pulley (805) are respectively arranged on the output shaft of the first motor (802) and the rotating shaft (803), and a transmission belt (806) is sleeved on the first pulley (804) and the second pulley (805); A vertical rod (808) is symmetrically arranged above the horizontal plate (807), and a brush (809) is arranged on the side of the vertical rod (808) close to the outer wall of the screen drum (11), and a quick-release structure (9) is arranged between the brush (809) and the vertical rod (808).

3. A pulp pressure screen according to claim 2, characterized in that: The quick-release structure (9) comprises: A void avoidance groove (901), wherein the void avoidance groove (901) is symmetrically arranged on the side of the vertical rod (808) close to the screen drum (11), and a chute (902) is arranged below the void avoidance groove (901), and a channel (903) is arranged on the side of the chute (902) close to the brush (809); A card block (904), the card block (904) is fixedly arranged on the back of the brush (809) and is arranged in a "convex" shape, and the narrow end of the card block (904) is slidably arranged in the channel (903); A fixing plate, the fixing plate being arranged on the top of the brush (809) and extending to the top of the vertical rod (808), the fixing plate being fixed to the top of the vertical rod (808) by screws; The pushing structure (10) is arranged below the slide groove (902) and is used to push the block (904) out of the slide groove (902).

4. A pulp pressure screen according to claim 3, characterized in that: The push-out structure (10) comprises: A lifting groove (1001), wherein the lifting groove (1001) is arranged at the bottom of the slide groove (902), and the width of the lifting groove (1001) is greater than the width of the slide groove (902); Lifting block (1002), the lifting block (1002) is slidably arranged in the lifting groove (1001) and is slidably connected to the lifting groove (1001). The bottom of the lifting block (1002) is symmetrically provided with ear plates (1003), and the ear plates (1003) are used to limit the moving distance of the lifting block (1002). Spring (1004), the spring (1004) is arranged between the bottom surface of the lifting block (1002) and the bottom surface of the lifting groove (1001) and is used to push the lifting block (1002) to move.

5. A pulp pressure screen according to claim 3, characterized in that: Both sides of the channel (903) close to the clearance groove (901) are provided with inclined surfaces (12).

6. A pulp pressure screen according to claim 1, characterized in that: The cover body (3) and the sieve barrel (2) and the top end of the cover body (3) and the sieve drum (11) are both connected by bolts, and lifting structures (13) are arranged on both sides of the cover body (3).

7. A pulp pressure screen according to claim 6, characterized in that: The lifting structure (13) includes: Shell (1301), the shell (1301) is symmetrically arranged on both sides of the sieve barrel (2), and an opening (1302) is arranged on the side away from the sieve barrel (2). Guide rod (1303), lifting screw rod (1304), the guide rod (1303) and the lifting screw rod (1304) are respectively arranged in the shells (1301) on both sides, and the lifting screw rod (1304) penetrates through the bottom surface of the shell (1301) and the base (1). Second motor (1306), the second motor (1306) is arranged below the shell (1301), and the output shaft is connected to the lower end surface of the lifting screw rod (1304). Lifting plate (1305), the lifting plate (1305) is in an "L" shape, and the top end is fixedly connected to the cover body (3), and the lower end is slidably arranged in the shell (1301). Among them, both the lifting screw rod (1304) and the guide rod (1303) penetrate through the lower end of the lifting plate (1305), and the bidirectional screw rod and the lifting plate (1305) are in threaded connection.

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