A paper stabilizer

Abstract

The utility model provides a paper stabilizer, which is arranged in the area surrounded by the first drying cylinder, the second drying cylinder and the vacuum roller, and the paper stabilizer includes: a main structure; an exhaust duct, the first end of the exhaust duct is a closed port, and the second end of the exhaust duct is an exhaust port; an air supply duct, the air supply duct is spaced from the exhaust duct, and the first end of the air supply duct is an air supply port; a negative pressure balance duct, along the transverse direction of the paper stabilizer, the negative pressure balance duct connects the first inner cavity and the second inner cavity. By setting a negative pressure balance duct to connect the first inner cavity corresponding to the downward zone of the paper stabilizer and the second inner cavity corresponding to the upward zone, the negative pressure between the first inner cavity and the second inner cavity is balanced, which improves the stability of the paper stabilizer during operation and reduces the shaking of the paper web. Such uniform negative pressure can keep the paper web flat and reduce the local warping or depression of the paper web.

Description

Technical Field

[0001] The utility model relates to the technical field of papermaking, in particular to a paper stabilizer. Background Art

[0002] During the paper web production process, the paper web needs to go through multiple processes, such as pressing, drying, calendering, etc. A paper stabilizer is usually set up during the transmission of the paper web. The paper stabilizer can help fix the paper web and prevent the paper web from displacement, wrinkles or ripples during movement, thereby ensuring that each process can be carried out accurately.

[0003] Although the existing paper stabilizer can reduce the displacement of the paper web during movement, in order to reduce the occurrence of paper breaks and paper defects during the transmission of the paper web, the high vacuum degree of the downward zone of the paper web of the paper stabilizer can be increased. However, as the high vacuum degree of the downward zone increases, the high vacuum degree of the upward zone of the paper web of the paper stabilizer is insufficient, which is prone to jitter, resulting in poor stability during the operation of the paper stabilizer. Utility Model Content

[0004] The main purpose of the utility model is to provide a paper stabilizer, aiming to solve the problem that the existing paper stabilizer has poor stability during operation.

[0005] To achieve the above object, the utility model provides a paper stabilizer, which is arranged in an area surrounded by a first drying cylinder, a second drying cylinder and a vacuum roller, and comprises:

[0006] A main structure, the main structure comprising a first side box, a second side box, a first sealing plate, a second sealing plate and a third sealing plate, the first side box being arranged between the first drying cylinder and the vacuum roller, the second side box being arranged between the second drying cylinder and the vacuum roller, the first sealing plate being arranged at the front end of a triangular area surrounded by the first drying cylinder, the second drying cylinder and the vacuum roller, the second sealing plate being arranged at the top of a paper guiding partition inside the vacuum roller, and the second sealing plate being adapted to the vacuum roller, the third sealing plate being arranged at the rear end of a triangular area surrounded by the first drying cylinder, the second drying cylinder and the vacuum roller, the first side box, the second side box, the first sealing plate, the second sealing plate and the third sealing plate being matched to form an inner cavity, the inner cavity comprising a first inner cavity close to the first side box and a second inner cavity close to the second side box, the first inner cavity corresponding to a paper web descending area of ​​the paper stabilizer, and the second inner cavity corresponding to a paper web ascending area of ​​the paper stabilizer;

[0007] an exhaust duct, along the longitudinal direction of the paper stabilizer, the exhaust duct runs through the main structure and is located between the first inner cavity and the second inner cavity, the first end of the exhaust duct is a closed opening, the second end of the exhaust duct is an exhaust opening, the exhaust duct includes a first sub-exhaust duct and a second sub-exhaust duct, the first sub-exhaust duct is located in the lower half of the exhaust duct, the second sub-exhaust duct is located in the upper half of the exhaust duct, and the first sub-exhaust duct and the second sub-exhaust duct are arranged at intervals;

[0008] an air supply duct, along the longitudinal direction of the paper stabilizer, the air supply duct runs through the main structure and is located between the first inner cavity and the second inner cavity, the air supply duct is spaced apart from the exhaust duct, the first end of the air supply duct is an air supply port, and the first end of the air supply duct runs through the closed port of the first end of the exhaust duct, and the second end of the air supply duct extends and runs through the sealing plate of the main structure;

[0009] A negative pressure balance pipeline is arranged along the lateral direction of the paper stabilizer, and the negative pressure balance pipeline is connected with the first inner cavity and the second inner cavity.

[0010] Optionally, at least two negative pressure balancing pipelines are arranged along the longitudinal direction of the paper stabilizer.

[0011] Optionally, the spacing between adjacent negative pressure balance pipelines is the same.

[0012] Optionally, the paper stabilizer further comprises:

[0013] a first valve, the first valve being arranged on the first sub-exhaust pipe;

[0014] A second valve is provided on the second sub-exhaust pipe.

[0015] Optionally, end face air nozzles are also provided on the first side box body and the second side box body.

[0016] Optionally, a paper guiding sealing strip is provided on the second side box body.

[0017] Optionally, a scraper clamp and a scraper matched with the scraper clamp are further provided on the side of the second side box facing the vacuum roller.

[0018] Optionally, two sealing members are stacked at the first side box body, and when the sealing members are in a sealed state, the interior of a region of the paper stabilizer close to a peeling point in the descending zone is isolated from external airflow.

[0019] Optionally, the sealing element is a double-layer Teflon sealing strip.

[0020] Optionally, the paper stabilizer further includes an exhaust fan, which is arranged at the air exhaust port, and / or the paper stabilizer further includes an air supply fan, which is arranged at the air supply port.

[0021] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0022] The utility model provides a paper stabilizer, which is arranged in an area surrounded by a first drying cylinder, a second drying cylinder and a vacuum roller, and the paper stabilizer comprises: a main structure, the main structure comprises a first side box, a second side box, a first sealing plate, a second sealing plate and a third sealing plate, the first side box is arranged between the first drying cylinder and the vacuum roller, the second side box is arranged between the second drying cylinder and the vacuum roller, the first sealing plate is arranged at the front end of a triangular area surrounded by the first drying cylinder, the second drying cylinder and the vacuum roller, the second sealing plate is arranged at the top of a paper guiding partition inside the vacuum roller, and the second sealing plate is adapted to the vacuum roller, the third sealing plate is arranged at the rear end of the triangular area surrounded by the first drying cylinder, the second drying cylinder and the vacuum roller, the first side box, the second side box, the first sealing plate, the second sealing plate and the third sealing plate cooperate to form an inner cavity, the inner cavity comprises a first inner cavity close to the first side box and a second inner cavity close to the second side box, and the first inner cavity corresponds to a paper web descending area of ​​the paper stabilizer , the second inner cavity corresponds to the paper web upward area of ​​the paper stabilizer; an exhaust duct, along the longitudinal direction of the paper stabilizer, the exhaust duct runs through the main structure and is located between the first inner cavity and the second inner cavity, the first end of the exhaust duct is a closed port, the second end of the exhaust duct is an exhaust port, the exhaust duct includes a first sub-exhaust duct and a second sub-exhaust duct, the first sub-exhaust duct is located in the lower half of the exhaust duct, the second sub-exhaust duct is located in the upper half of the exhaust duct, the first sub-exhaust duct and the second sub-exhaust duct The invention provides an air supply duct along the longitudinal direction of the paper stabilizer, the air supply duct runs through the main structure and is located between the first inner cavity and the second inner cavity, the air supply duct is spaced from the exhaust duct, the first end of the air supply duct is an air supply port, and the first end of the air supply duct runs through the closed port of the first end of the exhaust duct, and the second end of the air supply duct extends and runs through the sealing plate of the main structure; the negative pressure balance duct along the transverse direction of the paper stabilizer, the negative pressure balance duct connects the first inner cavity and the second inner cavity. In the embodiment of the utility model, air can be exhausted through the exhaust duct to generate negative pressure or vacuum in the inner cavity, so that the paper web can be adsorbed on the upward and downward areas of the paper stabilizer, reducing the displacement of the paper web during the transmission process; at the same time, air is supplied through the air supply duct, and support is provided by directional airflow, so that the paper is supported during the transmission process, reducing the situation where the paper web directly contacts the paper stabilizer and causes damage or wrinkles to the paper web. In addition, a negative pressure balance pipeline is provided to connect the first inner cavity corresponding to the downward zone of the paper stabilizer and the second inner cavity corresponding to the upward zone, so that the negative pressure between the first inner cavity and the second inner cavity is balanced, thereby improving the stability of the paper stabilizer during operation and reducing the jitter of the paper web. Such uniform negative pressure can keep the paper web flat and reduce local warping or depression of the paper web. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the scheme in the present application, a brief introduction is given below to the drawings required for use in the description of the embodiments of the present application. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 This is one of the structural schematic diagrams of a paper stabilizer provided in an embodiment of the utility model;

[0025] Figure 2 This is the second structural schematic diagram of a paper stabilizer provided by an embodiment of the utility model;

[0026] Figure 3 This is a third structural schematic diagram of a paper stabilizer provided by an embodiment of the utility model;

[0027] Figure 4 This is the fourth structural schematic diagram of a paper stabilizer provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0028] All technical and scientific terms used herein have the same meanings as those commonly understood by technicians in the technical field of the present application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" and any variations thereof in the specification and claims of the present application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0029] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0030] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0031] The utility model provides a paper stabilizer, such as Figures 1 to 4 As shown, the paper stabilizer 10 is arranged in an area surrounded by the first drying cylinder 20, the second drying cylinder 30 and the vacuum roller 40, and the paper stabilizer 10 includes:

[0032] The main structure includes a first side box 101, a first sealing plate 102, a second side box 103, a second sealing plate and a third sealing plate. The first side box 101 is arranged between the first drying cylinder 20 and the vacuum roller 40, the second side box 103 is arranged between the second drying cylinder 30 and the vacuum roller 40, the first sealing plate 102 is arranged at the front end of the triangular area surrounded by the first drying cylinder 20, the second drying cylinder 30 and the vacuum roller 40, the second sealing plate is arranged on the top of the paper guiding partition inside the vacuum roller, and the second The sealing plate is adapted to the vacuum roller 40, the third sealing plate is arranged at the rear end of the triangular area surrounded by the first drying cylinder 20, the second drying cylinder 30 and the vacuum roller 40, the first side box 101, the second side box 103, the first sealing plate 102, the second sealing plate and the third sealing plate cooperate to form an inner cavity, the inner cavity includes a first inner cavity close to the first side box 101 and a second inner cavity close to the second side box 103, the first inner cavity corresponds to the paper web descending area A of the paper stabilizer, and the second inner cavity corresponds to the paper web ascending area B of the paper stabilizer;

[0033] The exhaust duct 104, along the longitudinal direction of the paper stabilizer, passes through the main structure and is located between the first inner cavity and the second inner cavity, the first end of the exhaust duct 104 is a closed opening, and the second end of the exhaust duct 104 is an exhaust opening; the exhaust duct 104 includes a first sub-exhaust duct 1041 and a second sub-exhaust duct 1042, the first sub-exhaust duct 1041 is located in the lower half of the exhaust duct 104, the second sub-exhaust duct 1042 is located in the upper half of the exhaust duct 104, and the first sub-exhaust duct 1041 and the second sub-exhaust duct 1042 are spaced apart by a partition;

[0034] An air supply pipeline 105, along the longitudinal direction of the paper stabilizer, the air supply pipeline 105 passes through the main structure and is located between the first inner cavity and the second inner cavity, the air supply pipeline 105 and the exhaust pipeline 104 are spaced apart and do not interfere with each other, the first end of the air supply pipeline 105 is an air supply port, and the first end of the air supply pipeline 105 passes through the closed port of the first end of the exhaust pipeline 104, and the second end of the air supply pipeline 105 extends and passes through the sealing plate of the main structure, and enters the first end air nozzle opening 1051 and the second end air nozzle opening 1052;

[0035] A negative pressure balance pipeline 106 is provided along the lateral direction of the paper stabilizer, and the negative pressure balance pipeline 106 connects the first inner cavity and the second inner cavity.

[0036] In the embodiment of the utility model, the exhaust pipe 104 can be used to extract air to generate negative pressure or vacuum in the inner cavity, so that the paper web can be adsorbed on the upward and downward areas of the paper stabilizer, reducing the displacement of the paper web during the transmission process; at the same time, the air supply pipe 105 is used to supply air, and support is provided by directional airflow, so that the paper web is supported during the transmission process, reducing the situation where the paper web directly contacts the paper stabilizer and causes damage or wrinkles to the paper web. In addition, by setting a negative pressure balance pipe 106 to connect the first inner cavity corresponding to the downward area of ​​the paper stabilizer 10 and the second inner cavity corresponding to the upward area, the negative pressure between the first inner cavity and the second inner cavity is balanced, which improves the stability of the paper stabilizer 10 during operation and reduces the shaking of the paper web. Such uniform negative pressure can keep the paper web flat and reduce local warping or depression of the paper web.

[0037] Optionally, at least two negative pressure balancing pipelines 106 are arranged along the longitudinal direction of the paper stabilizer 10 .

[0038] In this embodiment, at least two negative pressure balancing pipelines 106 are arranged along the longitudinal direction of the paper stabilizer 10. For example, four negative pressure balancing pipelines 106 can be arranged along the longitudinal direction of the paper stabilizer 10 to open four channels between the first inner cavity and the second inner cavity. The vacuum degree can be quickly adjusted in different working stages of the paper stabilizer (for example, the paper feeding stage or the paper stabilizing stage, and different stages have different requirements for the vacuum degree). The negative pressure between the first inner cavity and the second inner cavity is balanced through the negative pressure balancing pipeline 106, thereby enhancing the response efficiency of the negative pressure balance and further improving the stability of the paper stabilizer 10 during operation.

[0039] Optionally, the spacings between adjacent negative pressure balance pipelines 106 are the same.

[0040] When a plurality of negative pressure balancing pipelines 106 are provided in the paper stabilizer 10, the spacings between adjacent negative pressure balancing pipelines 106 can be the same. Thus, along the longitudinal direction of the paper stabilizer 10, a plurality of negative pressure balancing pipelines 106 are arranged in an array, so that the negative pressure between the first inner cavity and the second inner cavity is balanced, thereby enhancing the response efficiency of the negative pressure balance and further improving the stability of the paper stabilizer 10 during operation.

[0041] Optionally, the paper stabilizer 10 further includes:

[0042] A first valve 107, wherein the first valve 107 is disposed on the first sub-exhaust pipe 1041;

[0043] A second valve 108, wherein the second valve 108 is disposed on the second sub-exhaust pipe 1042;

[0044] Among them, when the first valve 107 is in a closed state, the first sub-chamber is connected to the exhaust port, and the second sub-chamber is not connected to the exhaust port. When the first valve 107 is in an open state, both the first sub-chamber and the second sub-chamber are connected to the exhaust port. The first sub-chamber corresponds to the paper feeding area of ​​the paper stabilizer, and the second sub-chamber corresponds to the paper stabilizing area of ​​the paper stabilizer.

[0045] Optionally, the second valve 108 is a manual or electric regulating valve, and the opening and closing size of the second valve 108 controls the vacuum degree of the high vacuum stripping area, so as to adjust the negative pressure size of the high vacuum stripping area;

[0046] The air supply port, the first end tuyere port 1051 and the second end tuyere port 1052 are connected.

[0047] In this embodiment, the paper stabilizer 10 can be installed in the triangular area surrounded by the first drying cylinder 20, the second drying cylinder 30 and the vacuum roller 40. In an optional example, the paper stabilizer can also include a cylinder and a solenoid valve, the cylinder is connected to the first valve 107 to control the opening or closing of the first valve 107, and the solenoid valve is connected to the second valve 108 to control the opening or closing of the second valve 108. The cylinder can control the first valve 107 to be in a closed state to form a paper feeding area and a paper stabilizing area in the longitudinal direction of the vacuum roller 40; the solenoid valve can control the second valve 108 to be in a closed state to form a paper feeding area and a paper stabilizing area in the transverse direction in the peeling down area (i.e., the area corresponding to the first side box 101).

[0048] During the paper feeding stage, the first valve 107 is controlled to be in an open state, and the second valve 108 is controlled to be adjusted to a suitable opening state through the electromagnetic valve. The vacuum roller 40 at the bottom of the paper stabilizer 10 only exhausts air near the paper feeding area on the operating side, and a closed state is formed near the downward peeling point of the paper stabilizer 10, generating negative pressure, so that the paper web is close to the dryer net when it leaves the second drying cylinder 30. During paper feeding, the exhaust air volume of the exhaust port is concentrated on the paper feeding area of ​​the paper stabilizer 10, and the first inner cavity is connected when the first valve 107 is in an open state. The air supply volume can be sent to the end face air nozzle through the air supply pipeline to form an air knife, and a closed state is formed between the first sealing plate and the third sealing plate, so that the paper web can be close to the dryer net and the lower vacuum roller 40, thereby improving the success rate of paper feeding. In addition, by setting a negative pressure balance pipeline 106 to connect the first inner cavity corresponding to the downward area of ​​the paper stabilizer 10 and the second inner cavity corresponding to the upward area, the negative pressure between the first inner cavity and the second inner cavity is balanced, thereby improving the stability of the paper stabilizer 10 during operation.

[0049] In the paper stabilizing stage, the first valve 107 is controlled to be in a closed state, and the second valve 108 is controlled to be adjusted to a suitable open state through the solenoid valve, the air supply port is connected to the first end closed port of the exhaust pipe 104, and the vacuum roller 40 at the lower part of the paper stabilizer 10 exhausts the entire web; when stabilizing the paper, the exhaust air volume of the exhaust port is dispersed to act on the first inner cavity and the second inner cavity, and the first inner cavity is connected to the second inner cavity through the negative pressure balance pipe 106, so that the wind pressure in the upward and downward areas can be evenly acted on the paper stabilizing area of ​​the paper stabilizer 10, balancing the negative pressure in the upward and downward areas, thereby improving the stability of paper transportation.

[0050] Optionally, the paper stabilizer further comprises an exhaust fan, which is arranged at an exhaust port. The exhaust fan may be a negative pressure fan, which works similarly to a vacuum cleaner, and absorbs air by generating negative pressure, thereby fixing the paper web. The exhaust fan can be used to increase the air pressure inside the paper stabilizer, ensuring that a stable and suitable negative pressure level is maintained, so that the paper web can be reliably fixed at a specified position. The exhaust port may be arranged at the operating side of the paper stabilizer to reduce the interference of the pipeline.

[0051] And / or, the paper stabilizer further comprises an air blower, which is arranged at an air supply port, and the air blower may be a blower to generate a strong and uniform airflow. The air blower may adjust the air volume and air pressure as required. The air blower blows out air through an air supply pipeline, and sends the air into the end face seals on the first sealing plate and the third sealing plate to form an air knife, thereby forming a sealing area for the entire paper stabilizer, effectively forming a negative pressure area, and reducing wear on the dryer network. In particular, when it is necessary to change the paper web path or handle soft paper webs, this air support can effectively prevent the paper web from being folded or damaged. The air supply port may be installed on the transmission side of the paper stabilizer to reduce pipeline interference.

[0052] Optionally, end face air nozzles are further provided on the first side box 101 and the second side box 103. The end face air nozzles are provided to enhance the sealing performance of the paper stabilizer and reduce the wear of the mechanical hard sealing plate on the drying network. The end face air nozzles can also blow out hot air to accelerate the drying process of the paper web and increase the production speed.

[0053] Optionally, a paper drawing sealing strip is provided on the second side box. The paper web may deviate due to inertia or mechanical problems. By providing the paper drawing sealing strip, a closed paper drawing area is formed on the side of the paper stabilizer during paper drawing, so that the paper web is closely attached to the dryer net under the action of negative pressure when it leaves the second drying cylinder 30, thereby avoiding wrinkles or breaks in the paper web, ensuring that the paper web can be accurately transferred to the next step, and improving the continuity and efficiency of the production line.

[0054] Optionally, a scraper clamp and a scraper adapted to the scraper clamp are also provided on the side of the second side box 103 facing the vacuum roller 40. The scraper rotates close to the surface of the roller or dryer, and removes pulp residues, impurities or other sediments adhering to it by physical cutting or peeling. This helps to keep the roller surface clean and ensure the smooth progress of subsequent processes. By keeping the roller clean, the scraper reduces the friction and tension fluctuations of the paper sheet caused by surface impurities, thereby reducing the possibility of paper sheet damage or breakage and improving the stability of the overall operation of the production line. The scraper clamp is used to accurately fix and support the scraper to ensure that the scraper can be close to the surface of the roller or dryer to provide effective and consistent scraping pressure. By adjusting the position and pressure of the scraper clamp, the contact angle and force of the scraper with the working surface can be changed, thereby accurately controlling the scraping effect to meet different process requirements.

[0055] Optionally, two seals 109 are stacked at the first side box 101 , and when the seals 109 are in a sealed state, the interior of the area of ​​the paper stabilizer 10 close to the peeling point of the descending zone is isolated from the external airflow.

[0056] In the present embodiment, both ends of the paper stabilizer 10 and the side paper feeding area adopt an air supply type airflow sealing method, and two sealing members 109 are stacked at the position of the first side box 101, so that the interior of the area of ​​the entire paper stabilizer 10 close to the peeling point of the descending area is isolated from the outside, ensuring the negative pressure at the peeling point of the entire paper stabilizer, so that the paper web is affected by the negative pressure and closely adheres to the dryer network when it leaves the second drying cylinder 30, ensuring the smooth operation of the paper web.

[0057] Optionally, the seal 109 is a double-layer Teflon sealing strip to improve the sealing performance. The seal 109 adopts a rotary seal, which is simple and convenient to operate, and the dryer net and the sealing strip can be quickly replaced. The seal adopts a double-layer Teflon sealing material, which is more wear-resistant and has better sealing performance, ensuring that the paper web leaves the upper drying cylinder and enters the negative pressure of the descending zone, thereby increasing the adsorption force between the paper sheet and the dryer net.

[0058] Optionally, the paper stabilizer 10 further includes a wind pressure sensor, which is disposed in the inner cavity. Different measuring points are provided in different areas inside the paper stabilizer, and the vacuum pressure is automatically transmitted to the distributed control system (DCS) through the hollow tube, without manual measurement. This improves the convenience of using the paper stabilizer.

[0059] Obviously, the embodiments described above are only some embodiments of the present application, rather than all embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to perform equivalent replacement of some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of this application, directly or indirectly used in other related technical fields, is similarly within the scope of patent protection of this application.

Claims

1. A paper stabilizer, characterized in that: The paper stabilizer is arranged in an area surrounded by the first drying cylinder, the second drying cylinder and the vacuum roller, and the paper stabilizer comprises: A main structure, the main structure comprising a first side box, a second side box, a first sealing plate, a second sealing plate and a third sealing plate, the first side box being arranged between the first drying cylinder and the vacuum roller, the second side box being arranged between the second drying cylinder and the vacuum roller, the first sealing plate being arranged at the front end of a triangular area surrounded by the first drying cylinder, the second drying cylinder and the vacuum roller, the second sealing plate being arranged at the top of a paper guiding partition inside the vacuum roller, and the second sealing plate being adapted to the vacuum roller, the third sealing plate being arranged at the rear end of a triangular area surrounded by the first drying cylinder, the second drying cylinder and the vacuum roller, the first side box, the second side box, the first sealing plate, the second sealing plate and the third sealing plate being matched to form an inner cavity, the inner cavity comprising a first inner cavity close to the first side box and a second inner cavity close to the second side box, the first inner cavity corresponding to a paper web descending area of ​​the paper stabilizer, and the second inner cavity corresponding to a paper web ascending area of ​​the paper stabilizer; an exhaust duct, along the longitudinal direction of the paper stabilizer, the exhaust duct runs through the main structure and is located between the first inner cavity and the second inner cavity, the first end of the exhaust duct is a closed opening, the second end of the exhaust duct is an exhaust opening, the exhaust duct includes a first sub-exhaust duct and a second sub-exhaust duct, the first sub-exhaust duct is located in the lower half of the exhaust duct, the second sub-exhaust duct is located in the upper half of the exhaust duct, and the first sub-exhaust duct and the second sub-exhaust duct are arranged at intervals; an air supply duct, along the longitudinal direction of the paper stabilizer, the air supply duct runs through the main structure and is located between the first inner cavity and the second inner cavity, the air supply duct is spaced apart from the exhaust duct, the first end of the air supply duct is an air supply port, and the first end of the air supply duct runs through the closed port of the first end of the exhaust duct, and the second end of the air supply duct extends and runs through the sealing plate of the main structure; A negative pressure balance pipeline is arranged along the lateral direction of the paper stabilizer, and the negative pressure balance pipeline is connected with the first inner cavity and the second inner cavity.

2. The paper stabilizer according to claim 1, characterized in that: At least two negative pressure balance pipelines are arranged along the longitudinal direction of the paper stabilizer.

3. The paper stabilizer according to claim 2, characterized in that: The spacings between adjacent negative pressure balance pipelines are the same.

4. The paper stabilizer according to claim 1, characterized in that: The paper stabilizer also includes: a first valve, the first valve being arranged on the first sub-exhaust pipe; A second valve is provided on the second sub-exhaust pipe.

5. The paper stabilizer according to claim 1, characterized in that: End face air nozzles are also arranged on the first side box body and the second side box body.

6. The paper stabilizer according to claim 1, characterized in that: A paper guiding sealing strip is arranged on the second side box body.

7. The paper stabilizer according to claim 1, characterized in that: A scraper clamp and a scraper matched with the scraper clamp are also arranged on the side of the second side box facing the vacuum roller.

8. The paper stabilizer according to claim 1, characterized in that: Two sealing members are stacked at the first side box body, and when the sealing members are in a sealed state, the interior of the area of ​​the paper stabilizer close to the peeling point of the descending zone is isolated from the external airflow.

9. The paper stabilizer according to claim 8, characterized in that: The sealing element is a double-layer Teflon sealing strip.

10. The paper stabilizer according to claim 1, characterized in that: The paper stabilizer further includes an exhaust fan, which is arranged at the exhaust port, and / or the paper stabilizer further includes an air supply fan, which is arranged at the air supply port.

Images