Turbulent flow structure for headbox of paper machine

Abstract

The utility model belongs to the technical field of paper machines, and particularly relates to a turbulence structure for a paper machine headbox, which comprises a fixed pipe, a connecting pipe, a nozzle and a filter screen, the connecting pipe is mounted at the right end of the fixed pipe, the nozzle is fixedly connected to the left end of the fixed pipe, the filter screen is fixedly connected inside the fixed pipe, and a crushing device is arranged inside the fixed pipe. The crushing device comprises a fixing frame, a rotating shaft, an impeller and a blade. According to the turbulent flow structure for the headbox of the paper machine, an impeller is driven to rotate when paper pulp flows, so that a rotating shaft rotates to drive a blade to rotate to cut up accumulated paper residues and stir and mix the paper residues with the paper pulp to prevent a filter screen from being blocked, an outer gear ring is driven to rotate through the rotating shaft, and a gear and an inner gear ring rotate; and finally, the fixed pipe and the spray head are driven to rotate, so that the guniting range is wider and more uniform, the opening and closing degree of the spray head is controlled by rotating the adjusting cover, different guniting requirements are met, and unnecessary rotation of the adjusting cover is prevented through cooperation of a limiting block and a semicircular groove.

Description

TECHNICAL FIELD

[0001] The utility model relates to paper machine technical field, concretely is a kind of turbulent structure for paper machine flow box. BACKGROUND

[0002] The turbulent pipe is a component connected with the turbulent box in the papermaking equipment, is the last component through which the paper pulp is passed and sprayed, and has a relatively simple function, but can affect the forming effect of the paper pulp.

[0003] However, the paper residue in the filter hole of the filter screen can be pushed out by the insertion rod and fall on one side of the filter screen and gradually accumulate together, and if not cleaned in time, the turbulent pipe can be gradually blocked, affecting the subsequent flow of paper pulp.

[0004] For example, Chinese patent CN221118078U discloses a turbulent structure for a paper machine flow box, which includes a fixed pipe having a nozzle on the outside, the nozzle being movably connected to the inside of the fixed pipe, the nozzle and the fixed pipe having a connecting pipe at both ends, the connecting pipe being fixedly connected to the fixed pipe and the nozzle, and the connecting pipe being telescopic, the inside of the connecting pipe having a top plate movably arranged therein, one side of the top plate having a compression spring fixedly arranged in the connecting pipe, and the outside of the top plate having an insertion rod.

[0005] However, the paper residue in the filter hole of the filter screen can be pushed out by the insertion rod and fall on one side of the filter screen and gradually accumulate together, and if not cleaned in time, the turbulent pipe can be gradually blocked, affecting the subsequent flow of paper pulp. UTILITY MODEL CONTENTS

[0006] The utility model aims to provide a turbulent structure for a paper machine flow box to solve the problem that the insertion rod pushes out the paper residue in the filter hole of the filter screen and falls on one side of the filter screen and gradually accumulates together, and if not cleaned in time, the turbulent pipe can be gradually blocked, affecting the subsequent flow of paper pulp.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a turbulent structure for a paper machine flow box, comprising a fixed pipe, a connecting pipe, a nozzle and a filter screen, the connecting pipe being installed at the right end of the fixed pipe, the nozzle being fixedly connected to the left end of the fixed pipe, the filter screen being fixedly connected to the inside of the fixed pipe, and the inside of the fixed pipe being provided with a crushing device.

[0008] The crushing device comprises a fixed frame, a rotating shaft, an impeller and a blade, the fixed frame is fixedly connected to the inside of the connecting pipe, the rotating shaft is rotatably connected to the inner surface of the fixed frame, the impeller is fixedly connected to the outer surface of the rotating shaft, and the blade is fixedly connected to the outer surface of the rotating shaft and contacts the right side of the filter screen.

[0009] Preferably, the right end of the fixed pipe is provided with a limiting ring, the left end of the connecting pipe is provided with a limiting groove, the fixed pipe and the connecting pipe are rotatably connected through the limiting ring and the limiting groove, and the right end of the connecting pipe is connected with the output end of the pressurizing pump.

[0010] Preferably, the inner surface of the fixed pipe is fixedly connected with an inner ring gear near one end of the connecting pipe, a connecting shaft is rotatably connected to the inside of the fixed frame, the connecting shaft is fixedly connected with a gear near one end of the inner ring gear, the outer surface of the rotating shaft is fixedly connected with an outer ring gear, and the outer ring gear is meshed with the outer surface of the gear.

[0011] Preferably, the inside of the fixed pipe is provided with a connecting plate, the right side of the connecting plate is fixedly connected with a cleaning rod, the cleaning rod is matched with the filter hole in the inside of the filter screen, and the left side of the connecting plate is fixedly connected with one end of a cleaning spring.

[0012] Preferably, the inside of the fixed pipe is provided with a connecting plate, the right side of the connecting plate is fixedly connected with a cleaning rod, the cleaning rod is matched with the filter hole in the inside of the filter screen, and the left side of the connecting plate is fixedly connected with one end of a cleaning spring.

[0013] Preferably, the left side of the nozzle is provided with an adjusting cover, the inner surface of the adjusting cover is provided with a mounting groove, and the outer surface of the nozzle is fixedly connected with a mounting ring on the left side.

[0014] Preferably, the outer surface of the mounting ring is provided with a semicircular groove, the semicircular groove is provided with a limiting block, the limiting block is sleeved with a limiting spring away from the mounting ring, and the other end of the limiting spring is fixedly connected to the inside of the mounting groove.

[0015] Compared with the prior art, the paper pulp crushing device has the advantages that

[0016] 1. The turbulent flow structure for the headbox of papermaking machine, by rotating the impeller when the paper pulp flows, the rotating shaft is rotated to rotate the blade to cut the accumulated paper residue and mix with the paper pulp to prevent the filter screen from being blocked, the outer gear ring is rotated by the rotating shaft to rotate the gear and the inner gear ring, finally the fixed pipe and the nozzle are rotated to make the pulp spraying range wider and more uniform, when the filter hole is blocked, the paper pulp flow rate slows down, the cleaning spring drives the connecting plate and the cleaning rod to move to clean the inside of the filter hole, at this time the paper pulp flow rate increases to press the connecting plate to reset, the connecting plate moves more stably through the telescopic pipe.

[0017] 2. The turbulent flow structure for the headbox of papermaking machine, the size of the nozzle opening is controlled by rotating the adjusting cover to meet different pulp spraying requirements, the adjusting cover is prevented from unnecessary rotation by the cooperation of the limiting block and the semicircular groove. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the overall structure schematic view of the utility model;

[0019] Figure 2 It is the broken structure schematic view of the utility model;

[0020] Figure 3 It is the rotating structure schematic view of the utility model;

[0021] Figure 4 It is the cleaning structure schematic view of the utility model;

[0022] Figure 5 It is the nozzle adjusting structure schematic view of the utility model.

[0023] In the drawing: 1, fixed pipe; 101, connecting pipe; 102, nozzle; 2, fixed frame; 201, rotating shaft; 202, impeller; 203, blade; 3, adjusting cover; 301, mounting groove; 302, mounting ring; 303, limiting block; 304, limiting spring; 4, filter screen; 401, cleaning rod; 402, connecting plate; 403, cleaning spring; 404, fixed plate; 405, telescopic pipe; 5, inner gear ring; 501, gear; 502, connecting shaft; 503, outer gear ring. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0025] Embodiment one: based on the existing plug rod in the ejection located in the filter screen filter hole inside the paper residue will make it fall on the filter screen side and gradually accumulated together, not timely cleaning will gradually block the turbulent pipe, affect the follow-up pulp flow problems, the embodiment provides a turbulent structure for paper machine headbox, please refer to Figures 1-5 , the embodiment provides a turbulent structure for paper machine headbox, can cut the accumulated paper residue and mix with the pulp to prevent the filter screen from being blocked, and can make the pulp spraying range wider and more uniform. The turbulent structure for paper machine headbox, comprising a fixed pipe 1, a connecting pipe 101, a nozzle 102 and a filter screen 4, the connecting pipe 101 is installed at the right end of the fixed pipe 1, the nozzle 102 is fixedly connected to the left end of the fixed pipe 1, the filter screen 4 is fixedly connected to the inside of the fixed pipe 1, the inside of the fixed pipe 1 is provided with a crushing device;

[0026] The crushing device comprises a fixed frame 2, a rotating shaft 201, an impeller 202 and a blade 203, the fixed frame 2 is fixedly connected to the inside of the connecting pipe 101, the rotating shaft 201 is rotatably connected to the inner surface of the fixed frame 2, the impeller 202 is fixedly connected to the outer surface of the rotating shaft 201, the blade 203 is fixedly connected to the outer surface of the rotating shaft 201 and contacts the right side of the filter screen 4, the right end of the fixed pipe 1 is provided with a limiting ring, the left end of the connecting pipe 101 is provided with a limiting groove, the fixed pipe 1 and the connecting pipe 101 are rotatably connected through the limiting ring and the limiting groove, the right end of the connecting pipe 101 is connected with the output end of the pressure pump, the inner surface of the fixed pipe 1 close to one end of the connecting pipe 101 is fixedly connected with an inner gear ring 5, a connecting shaft 502 is rotatably connected in the fixed frame 2, the connecting shaft 502 is fixedly connected with a gear 501 close to one end of the inner gear ring 5 and the gear 501 meshes with the inner surface of the inner gear ring 5, the outer surface of the rotating shaft 201 is fixedly connected with an outer gear ring 503 and the outer gear ring 503 meshes with the outer surface of the gear 501;

[0027] The inside of the fixed pipe 1 is provided with a connecting plate 402, the right side of the connecting plate 402 is fixedly connected with a cleaning rod 401, the cleaning rod 401 is matched with the filter hole in the inside of the filter screen 4, the left side of the connecting plate 402 is fixedly connected with one end of a cleaning spring 403, the inside of the nozzle 102 is fixedly connected with a fixed plate 404, the right side of the fixed plate 404 is fixedly connected with a telescopic pipe 405 and the other end of the telescopic pipe 405 is fixedly connected with the connecting plate 402, the cleaning spring 403 is sleeved on the outer surface of the telescopic pipe 405 and the other end is fixedly connected with the right side of the fixed plate 404.

[0028] In this embodiment, the rotation of the impeller 202 driven by the pulp flow makes the rotating shaft 201 rotate and drive the blade 203 to rotate, which cuts the accumulated paper residues and mixes them with the pulp to prevent the filter screen 4 from being blocked. The rotation of the outer ring gear 503 driven by the rotating shaft 201 makes the gear 501 and the inner ring gear 5 rotate, which finally drives the fixed pipe 1 and the nozzle 102 to rotate to make the pulp spraying range wider and more uniform. When the filter holes are blocked, the pulp flow rate slows down, the cleaning spring 403 drives the connecting plate 402 and the cleaning rod 401 to move to clean the internal pulp of the filter holes. At this time, the pulp flow rate increases to press the connecting plate 402 to reset. The extension tube 405 makes the connecting plate 402 move more stably.

[0029] Example two: based on example one, please refer to Figures 1-5 , which can control the opening and closing size of the nozzle to meet different pulp spraying requirements. The left side of the nozzle 102 is provided with an adjusting cover 3, the inner surface of the adjusting cover 3 is provided with a mounting groove 301, the outer surface of the left side of the nozzle 102 is fixedly connected with a mounting ring 302, the outer surface of the mounting ring 302 is provided with a semicircular groove, a limiting block 303 is installed inside the semicircular groove, the end of the limiting block 303 away from the mounting ring 302 is sleeved with a limiting spring 304, and the other end of the limiting spring 304 is fixedly connected to the inside of the mounting groove 301.

[0030] In this embodiment, the rotation of the adjusting cover 3 controls the opening and closing size of the nozzle 102 to meet different pulp spraying requirements, and the limiting block 303 and the semicircular groove cooperate to prevent unnecessary rotation of the adjusting cover 3.

[0031] Working principle: the rotation of the impeller 202 driven by the pulp flow makes the rotating shaft 201 rotate and drive the blade 203 to rotate, which cuts the accumulated paper residues and mixes them with the pulp to prevent the filter screen 4 from being blocked. The rotation of the outer ring gear 503 driven by the rotating shaft 201 makes the gear 501 and the inner ring gear 5 rotate, which finally drives the fixed pipe 1 and the nozzle 102 to rotate to make the pulp spraying range wider and more uniform. When the filter holes are blocked, the pulp flow rate slows down, the cleaning spring 403 drives the connecting plate 402 and the cleaning rod 401 to move to clean the internal pulp of the filter holes. At this time, the pulp flow rate increases to press the connecting plate 402 to reset. The extension tube 405 makes the connecting plate 402 move more stably. The rotation of the adjusting cover 3 controls the opening and closing size of the nozzle 102 to meet different pulp spraying requirements, and the limiting block 303 and the semicircular groove cooperate to prevent unnecessary rotation of the adjusting cover 3.

[0032] It is to be noted that, as used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to "a component" can include a combination of two or more components. Additionally, the terms "comprise," "comprises," and "comprising," or any variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements is not necessarily limited to those elements, but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Furthermore, unless otherwise indicated herein, the terms "first," "second," "third," etc., are used herein merely as labels, and are not intended to impose ordinal import.

Claims

1. A turbulent flow structure for a headbox of a paper machine, comprising a stationary pipe (1), a connecting pipe (101), a nozzle (102) and a filter screen (4), characterized in that: The connecting pipe (101) is installed at the right end of the fixed pipe (1), the spray head (102) is fixedly connected to the left end of the fixed pipe (1), the filter screen (4) is fixedly connected to the inside of the fixed pipe (1), and the fixed pipe (1) is provided with a crushing device inside; The crushing device comprises a fixed frame (2), a rotating shaft (201), an impeller (202) and a blade (203), the fixed frame (2) is fixedly connected to the inside of the connecting pipe (101), the rotating shaft (201) is rotatably connected to the inner surface of the fixed frame (2), the impeller (202) is fixedly connected to the outer surface of the rotating shaft (201), and the blade (203) is fixedly connected to the outer surface of the rotating shaft (201) and in contact with the right side of the filter screen (4).

2. A turbulence structure for a headbox of a papermaking machine according to claim 1, characterized in that: The right end of the fixed pipe (1) is provided with a limiting ring, the left end of the connecting pipe (101) is provided with a limiting groove, the fixed pipe (1) and the connecting pipe (101) are rotatably connected through the limiting ring and the limiting groove, and the right end of the connecting pipe (101) is connected with the output end of the pressure pump.

3. A turbulence structure for a headbox of a papermaking machine according to claim 1, characterized in that: The inner surface of the fixed pipe (1) is fixedly connected with an inner gear ring (5) near one end of the connecting pipe (101), the fixed frame (2) is rotatably connected with a connecting shaft (502) inside, the connecting shaft (502) is fixedly connected with a gear (501) near one end of the inner gear ring (5), and the gear (501) is in mesh with the inner surface of the inner gear ring (5), and the outer surface of the rotating shaft (201) is fixedly connected with an outer gear ring (503), and the outer gear ring (503) is in mesh with the outer surface of the gear (501).

4. A turbulence structure for a headbox of a papermaking machine according to claim 1, characterized in that: The inside of the fixed pipe (1) is provided with a connecting plate (402), the right side of the connecting plate (402) is fixedly connected with a cleaning rod (401), the cleaning rod (401) is matched with the filter hole inside the filter screen (4), and the left side of the connecting plate (402) is fixedly connected with one end of a cleaning spring (403).

5. A turbulence structure for a headbox of a papermaking machine according to claim 4, characterized in that: The inside of the spray head (102) is fixedly connected with a fixed plate (404), the right side of the fixed plate (404) is fixedly connected with a telescopic pipe (405), and the other end of the telescopic pipe (405) is fixedly connected with the connecting plate (402), the cleaning spring (403) is sleeved on the outer surface of the telescopic pipe (405) and the other end is fixedly connected with the right side of the fixed plate (404).

6. A turbulence structure for a headbox of a papermaking machine according to claim 1, characterized in that: The left side of the spray head (102) is provided with an adjusting cover (3), the inner surface of the adjusting cover (3) is provided with a mounting groove (301), and the outer surface of the spray head (102) is fixedly connected with a mounting ring (302) on the left side.

7. A turbulence structure for a headbox of a papermaking machine according to claim 6, characterized in that: The outer surface of the mounting ring (302) is provided with a semicircular groove, the semicircular groove is provided with a limiting block (303) inside, one end of the limiting block (303) away from the mounting ring (302) is sleeved with a limiting spring (304), and the other end of the limiting spring (304) is fixedly connected to the inside of the mounting groove (301).

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