Visual headbox return pipe

Abstract

The utility model belongs to the technical field of papermaking, and relates to a visual headbox return pipe which comprises a headbox, the left end and the right end of the headbox are connected with return pipes through balance adjusting valves, and visual assemblies are arranged in the middles of the return pipes. The visual assembly comprises an observation cover and an outer sleeve, a through groove is formed in the backflow pipe, the observation cover covers the through groove, a fixing hole is formed in the outer sleeve, the outer sleeve is fixed to the backflow pipe through the fixing hole, and an observation opening corresponding to the observation cover and the through groove is formed in the outer sleeve. The visual component is mounted on the headbox, so that an operator can check the fiber flowing direction of the headbox at any time, the flowing state in the balance pipe is adjusted by adjusting the opening degree of the pulp valve of the headbox, the stable fiber flowing speed and direction are ensured, the pressure values on the two sides of the headbox are balanced, the longitudinal and transverse arrangement of the fibers is improved, and the quality of the fibers is improved. Fibers are longitudinally distributed as far as possible, the transverse proportion is reduced, and the distortion risk is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of papermaking and relates to a visual headbox return pipe. Background Art

[0002] In recent years, with the continuous development of the cigarette card market, the quality of cigarette packs has been continuously improved. At the same time, due to the large demand for cigarette cards and the special printing requirements, cigarette card users have increasingly strict quality requirements for cigarette cards. Therefore, cigarette card manufacturers and users have formulated a series of relevant indicators to ensure the suitability of cigarette cards. However, since the white card paper for cigarette packs is mainly printed by roll-fed high-speed gravure printing machines, the processing speed is fast, and the paper absorbs and loses water rapidly due to frequent printing and rapid drying, and the fiber swells and shrinks. Due to the high-speed printing machine, there is no time for the paper to balance, so the problem of cigarette card distortion is prone to occur. The distortion of cigarette cards will lead to poor printing and reduced customer printing efficiency. This is a problem currently encountered by various domestic manufacturers. Chinese patent CN214423007U discloses a headbox feeding system, including a dilution tank for supplying PEO dispersant dilution liquid to the headbox, and a pulping tank, a sizing pump, a high-level box and a flushing pump connected to the headbox in sequence along the pulp flow direction. An overflow hole is provided on the side wall of the high-level box, and a liquid level regulating valve and a reflux pipe are provided in sequence between the overflow hole and the pulping tank along the pulp reflux direction. The liquid level regulating valve and the overflow hole are arranged at the same height, and include a valve body, a liquid inlet channel and a liquid outlet channel provided in the valve body, a valve core rotatably provided between the liquid inlet channel and the liquid outlet channel, and a drive assembly connected to the valve core in transmission. A plurality of liquid level regulating holes are provided through the valve core, and the plurality of liquid level regulating holes are spirally arranged in sequence from top to bottom, so that when the valve core rotates, each liquid level regulating hole can be individually connected to the liquid inlet channel and the liquid outlet channel. The reflux pipe is a stainless steel pipe

[0003] The prior art has the following technical defects:

[0004] The fundamental reason for the distortion of cigarette cards lies in the ratio of the vertical and horizontal arrangement of fibers in the paper. A large ratio of the horizontal arrangement of fibers will cause distortion, and the key position affecting the vertical and horizontal arrangement of fibers is the headbox. The fiber arrangement can be optimized by adjusting the headbox return pipe. The headbox return pipes currently used are all made of stainless steel. The slurry in them is not easy to check and control the reflux state, which leads to uneven pressure values ​​on both sides of the headbox, thereby affecting the vertical and horizontal ratio of fibers and causing the paper to distort. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a visual headbox return pipe.

[0006] The visualized flow box return pipe of the utility model comprises a flow box, and both left and right ends of the flow box are connected with the return pipe through a balance regulating valve, and a visualization component is provided in the middle of the return pipe; the visualization component comprises an observation cover and an outer sleeve, a through groove is provided on the return pipe, the observation cover covers the through groove, a fixing hole is provided on the outer sleeve, the outer sleeve is fixed to the return pipe through the fixing hole, and an observation port corresponding to the observation cover and the through groove is provided on the outer sleeve.

[0007] Working process or working principle:

[0008] During operation, the operator can observe the fiber flow direction and flow rate in the return pipe through the observation cover, and control and adjust the flow state in the return pipe through the balance regulating valves at both ends of the headbox to ensure the stability of the fiber direction and flow rate, so that the pressure at both ends of the headbox is balanced, thereby improving the longitudinal and transverse arrangement of the fibers and reducing the risk of distortion of the cigarette card.

[0009] The reflux pipe is provided with a stopper matched with the observation cover, which can ensure that the observation cover will not move during installation and use, thereby preventing the reflux pipe from leaking.

[0010] The outer sleeve is provided with a tightening hole, and the observation cover is provided with a tightening rubber corresponding to the tightening hole. The observation cover is fixed to the return pipe through the outer sleeve, and the observation cover is tightened to the return pipe by a tightening bolt passing through the outer sleeve. The tightening rubber on the observation cover protects the observation cover from damage when it is tightened.

[0011] The inner wall of the outer sleeve is provided with a slide groove matched with the observation cover, which is convenient for installation.

[0012] The observation cover is made of glass, which can visually observe the internal situation of the reflux pipe. Other transparent materials can also be used.

[0013] A sealing member is provided between the reflux pipe and the observation cover, and the sealing member includes but is not limited to a rubber pad, a rubber ring, a sealing glue, etc.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model installs a visual component in the headbox so that the operator can check the fiber flow direction of the headbox at any time, and adjusts the flow state in the balance pipe by adjusting the opening of the headbox slurry valve to ensure the stability of the fiber flow rate and direction, so that the pressure values ​​on both sides of the headbox are balanced, and at the same time, the pulp-net speed difference is used to improve the longitudinal and transverse arrangement of the fibers, so that the fibers are distributed in the longitudinal direction as much as possible, the transverse proportion is reduced, and the distortion risk is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.

[0017] Figure 2 It is a schematic diagram of the inner wall structure of the outer sleeve in one embodiment of the utility model.

[0018] Figure 3 It is a working assembly schematic diagram of an embodiment of the utility model.

[0019] In the figure: 1. headbox; 2. balance regulating valve; 3. return pipe; 4. observation port; 5. through slot; 6. stopper; 7. observation cover; 8. fixing hole; 9. tightening hole; 10. outer sleeve; 11. slide groove; 12. tightening rubber. DETAILED DESCRIPTION

[0020] Example 1

[0021] like Figure 1 to Figure 3 As shown, the visualized flow box 1 return pipe 3 described in the utility model comprises a flow box 1, both left and right ends of the flow box 1 are connected to the return pipe 3 through a balance regulating valve 2, and a visualization component is provided in the middle of the return pipe 3; the visualization component comprises an observation cover 7 and an outer sleeve 10, a through groove 5 is provided on the return pipe 3, the observation cover 7 covers the through groove 5, a fixing hole 8 is provided on the outer sleeve 10, the outer sleeve 10 is fixed to the return pipe 3 through the fixing hole 8, and an observation port 4 corresponding to the observation cover 7 and the through groove 5 is provided on the outer sleeve 10; the return pipe 3 is provided with a stopper 6 adapted to the observation cover 7, which can ensure that the observation cover 7 will not move during installation and use, thereby causing leakage of the return pipe 3 ; A tightening hole 9 is provided on the outer sleeve 10, and a tightening rubber 12 corresponding to the tightening hole 9 is provided on the observation cover 7. The observation cover 7 is fixed to the reflux pipe 3 through the outer sleeve 10, and the observation cover 7 is tightened to the reflux pipe by a tightening bolt passing through the outer sleeve 10. The tightening rubber 12 on the observation cover 7 protects the observation cover 7 from damage when being tightened; A slide groove 11 adapted to the observation cover 7 is provided on the inner wall of the outer sleeve 10 for easy installation; The observation cover 7 is made of glass, which can intuitively observe the internal situation of the reflux pipe 3, and other transparent materials can also be used; A sealing member is provided between the reflux pipe 3 and the observation cover 7, and the sealing member includes but is not limited to a rubber pad, a rubber ring, a sealant, etc.

[0022] Working process or working principle:

[0023] During operation, the operator can observe the fiber flow direction and flow velocity in the return pipe 3 through the observation cover 7, and control and adjust the flow state in the return pipe 3 through the balance regulating valve 2 at both ends of the headbox 1 to ensure the stability of the fiber direction and flow velocity, so that the pressure at both ends of the headbox 1 is balanced, thereby improving the longitudinal and transverse arrangement of the fibers and reducing the risk of distortion of the cigarette card. The size of the observation port 4 on the outer sleeve 10 and the through groove 5 on the return pipe 3 are both smaller than the size of the observation cover 7, so as to prevent the observation cover 7 from falling off from the observation port 4 and squeezing into the return pipe 3 to cause production accidents.

[0024] The utility model installs a visual component on the headbox 1 so that the operator can check the fiber flow direction of the headbox 1 at any time, and adjusts the flow state in the balance pipe by adjusting the opening of the slurry valve of the headbox 1, thereby ensuring the stability of the fiber flow rate and direction, and making the pressure values ​​on both sides of the headbox 1 balanced. At the same time, the pulp-net speed difference is used to improve the longitudinal and transverse arrangement of the fibers, so that the fibers are distributed in the longitudinal direction as much as possible, the transverse proportion is reduced, and the distortion risk is reduced.

[0025] The description of the direction and relative position relationship of the structure in the present invention, such as the description of front, back, left, right, up, and down, does not constitute a limitation of the present invention, but is only for the convenience of description.

Claims

1. A visualized headbox return pipe, comprising a headbox (1), wherein both left and right ends of the headbox (1) are connected to a return pipe (3) via a balance regulating valve (2), and characterized in that: A visualization component is provided in the middle of the reflux pipe (3); The visualization component comprises an observation cover (7) and an outer sleeve (10); a through groove (5) is provided on the return pipe (3); the observation cover (7) covers the through groove (5); a fixing hole (8) is provided on the outer sleeve (10); the outer sleeve (10) is fixed to the return pipe (3) through the fixing hole (8); and an observation port (4) corresponding to the observation cover (7) and the through groove (5) is provided on the outer sleeve (10).

2. The visualized headbox return pipe according to claim 1, characterized in that: The reflux pipe (3) is provided with a stopper (6) matched with the observation cover (7).

3. The visualized headbox return pipe according to claim 2, characterized in that: The outer sleeve (10) is provided with a tightening hole (9), and the observation cover (7) is provided with a tightening rubber (12) corresponding to the tightening hole (9).

4. The visualized headbox return pipe according to claim 3 is characterized in that: The inner wall of the outer sleeve (10) is provided with a slide groove (11) which is matched with the observation cover (7).

5. The visualized headbox return pipe according to any one of claims 1 to 4, characterized in that: The observation cover (7) is made of glass.

6. The visualized headbox return pipe according to claim 5, characterized in that: A sealing member is provided between the reflux pipe (3) and the observation cover (7).

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