Three-sided air bag area paper stabilizing blower

Abstract

The present invention provides a three-sided air supply bag area paper stabilization blow box, comprising a blow box body, a constant pressure chamber is formed inside the blow box body, and profile bodies are respectively provided on the three sides of the blow box body, a steady flow chamber is formed inside the profile body, one side of the steady flow chamber is connected to the constant pressure chamber, and a tapering channel is formed on the other side of the steady flow chamber, and the outlet of the tapering channel is connected to the atmosphere, so that the air flow passes through the constant pressure chamber, the steady flow chamber, and the tapering channel in sequence and is blown out; in the first profile body, the profile body is located at the paper feed end of the dry mesh running section; in the second profile body, the profile body is located at the paper discharge end of the dry mesh running section; in the third profile body, the profile body is located between the dry mesh guide roller and the dry mesh drying cylinder. The present application adopts a three-cavity steady flow structure to increase the effect of the blow box air supply and paper stabilization, reduce wind pressure loss, and at the same time realize supplementary air supply in the bag area, reduce air volume loss, and improve energy utilization.

Description

Technical Field

[0001] The invention relates to the field of papermaking equipment, in particular to a paper stabilizing blowing box with three-sided air supply bag areas. Background Art

[0002] The relatively enclosed area consisting of the dryer fabric, paper web, and drying cylinder is called the "pocket area." A typical paper stabilization blow box has two main air outlets: the primary outlet supplies air to the pocket area, while the secondary outlet creates negative pressure at the paper web entrance, allowing the web to adhere to the dryer fabric. Because both outlets share the same box cavity, the air supply pressure is uneven, resulting in uneven negative pressure. Furthermore, when only one negative pressure outlet generates limited negative pressure, the negative pressure required for paper stabilization increases as vehicle speed increases. This is especially true at high vehicle speeds (e.g., exceeding 1000 m / s), where the required negative pressure may reach 1000 Pa. Continuing to use a single negative pressure outlet can cause the paper web to fold or flutter.

[0003] Therefore, it is necessary to redesign a blow box that can be used in one box even at high vehicle speeds, taking into account the dual needs of air supply to the bag area and paper stabilization. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the present invention provides a three-sided air supply bag area paper stabilization blow box, which adopts a three-cavity flow stabilization structure to enhance the air supply and paper stabilization effect of the blow box, reduce wind pressure loss, and simultaneously achieve supplementary air supply in the bag area, reduce air volume loss, and improve energy utilization. The technical solution adopted by the present invention is:

[0005] A three-sided air supply bag area stabilizing paper blow box, arranged in a bag area formed by a paper feed side drying cylinder, a dryer wire guide roller, and a dryer wire drying cylinder; the paper web path between the paper feed side drying cylinder and the dryer wire guide roller is a dryer wire running section; the two ends of the dryer wire running section are respectively a paper feed end and a paper discharge end; the blow box body comprises a blow box body, a constant pressure chamber is formed inside the blow box body, and profile bodies are respectively provided on three sides of the blow box body, a stabilizing flow chamber is formed inside the profile bodies, one side of the stabilizing flow chamber is connected to the constant pressure chamber, and the other side of the stabilizing flow chamber forms a tapering channel, the outlet of the tapering channel is connected to the atmosphere, so that the airflow passes through the constant pressure chamber, the stabilizing flow chamber, and the tapering channel in sequence and is blown out;

[0006] In the first profile body, the profile body corresponds to the paper feed end of the dryer fabric running section, the air flow direction of the outlet of the tapered channel is opposite to the feeding direction of the drying cylinder on the paper feed side, and a negative pressure area at the paper feed end is formed between the profile body and the paper feed end;

[0007] In the second profile body, the profile body corresponds to the paper discharge end of the dryer fabric running section, the air flow direction of the tapered channel outlet is opposite to the feeding direction of the dryer fabric guide roller, and a negative pressure area at the paper discharge end is formed between the profile body and the paper discharge end;

[0008] In the third profile body, the profile body corresponds to the dryer wire guide roller and the dryer wire drying cylinder, the air flow direction of the tapered channel outlet is opposite to the feed direction of the dryer wire drying cylinder, and a pocket air supply area is formed between the profile body, the dryer wire guide roller and the dryer wire drying cylinder;

[0009] Among them, the negative pressure area at the paper outlet end is connected with the air supply area of ​​the bag area.

[0010] Furthermore, the profile body includes a first stopper, a second stopper, a third stopper, a fourth stopper, and a fifth stopper;

[0011] One end of the first stopper is connected to the second stopper, the third stopper, and the fourth stopper in sequence, and the other end of the first stopper is connected to the fifth stopper. The first stopper, the second stopper, the third stopper, and the fourth stopper form a steady flow cavity.

[0012] The first stopper is provided with a contraction hole to accelerate the airflow from the constant pressure chamber into the steady flow chamber;

[0013] The third stopper and the fifth stopper are located on the same side of the first stopper and are arranged opposite to each other;

[0014] One end of the fifth stop portion extends toward a side of the third stop portion away from the first stop portion, so that a tapering channel communicating with the flow stabilization cavity is formed between the third stop portion and the fifth stop portion;

[0015] The outer surface of the third stopper and the inner surface of the fifth stopper are both arc-shaped, so that the airflow flows tangentially along the inner surface of the fifth stopper to the outer surface of the third stopper.

[0016] Furthermore, the fourth stop portion extends toward the first stop portion, and an extension line thereof intersects with the first stop portion.

[0017] Furthermore, the blow box body also includes

[0018] Three side panels are alternately connected to the three profile bodies to form the side surfaces of the blow box body;

[0019] Two end plates are respectively arranged at both ends of the side plate to form the end faces of the blowing box body;

[0020] an air inlet pipe connected to one of the end plates and communicating with the constant pressure chamber;

[0021] The fixed pipe is connected to the other end plate and is coaxially arranged with the air inlet pipe.

[0022] Furthermore, the profile body further includes

[0023] a first positioning portion, provided on a side of the second stop portion away from the first stop plate, for connecting to one of the side plates adjacent to the profile body;

[0024] The second positioning portion is arranged on a side of the fifth stop portion away from the first stop portion, and is used to connect to another of the side panels adjacent to the profile body.

[0025] Furthermore, the edge of the end plate is configured as an arc edge, and the center of the arc edge is located on the axis of the dryer wire guide roller.

[0026] Furthermore, a side area air volume regulating assembly is provided at the side areas at both ends of the constant pressure chamber and close to the side of the drying net cylinder. The side area air volume regulating assembly includes:

[0027] The cover is located at the edge of the constant pressure chamber, with one end covering the profile body and the other end abutting the end plate, and the cover is provided with an air volume adjustment port;

[0028] A rotating shaft is rotatably connected to the end plate, one end of which extends along the cover;

[0029] A windshield is located in the air volume regulating port and is connected to the rotating shaft;

[0030] The handle is located on the outside of the end plate and connected to the rotating shaft.

[0031] Furthermore, the side area air volume adjustment component also includes

[0032] The cover plate is located outside the blowing box body and fixed to the end plate, and the rotating shaft passes through the cover plate;

[0033] Two limiting posts are provided, and the cover plate is away from the side of the blow box body and distributed on both sides of the rotating shaft. The handle can swing between the two limiting posts.

[0034] Furthermore, a duct is provided at the air volume regulating port of the cover shell and on the side away from the profile body.

[0035] Furthermore, the end plate is provided with a sealing plate on one side of the paper feeding side drying cylinder and / or on one side of the dryer network drying cylinder.

[0036] Advantages of the present invention:

[0037] After the airflow passes through the constant pressure chamber for initial stabilization and the steady flow chamber for further stabilization, it is blown out from the tapering channel at an accelerated speed, thus enhancing the effect of air supply and stabilizing paper.

[0038] Profiles are provided at the paper feeding end and paper discharging end on the paper feeding side, which provide better negative pressure adsorption for the paper web, making the paper web adhere tightly to the dryer fabric and preventing the paper web from being folded or fluttered.

[0039] The air outlet of the profile body at the dryer cylinder forms an air knife to prevent the hot air from escaping upward and increasing the temperature of the bag area. At the same time, the air outlet of the profile body at the dryer cylinder is mixed with the air outlet of the profile body at the dryer cylinder and blown to the bag area, realizing the secondary utilization of air flow and reducing energy loss.

[0040] The blow box body is assembled, easy to assemble, and the independent shape of the profile body has the effect of turbulence and airflow guidance, so that the airflow flows out of the tapering channel at a faster and more stable speed;

[0041] The side air volume adjustment component reduces the side air outlet speed on the side of the dryer cylinder, increases the air volume in the middle section of the profile body, and removes moisture from the middle section of the paper web. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a schematic diagram of the use state of the present invention.

[0043] Figure 2 This is a cross-sectional view of the present invention.

[0044] Figure 3 It is a cross-sectional view of the profile body of the present invention.

[0045] Figure 4 It is a perspective view of the present invention.

[0046] Figure 5 It is a plan view of the present invention.

[0047] Figure 6 This is a schematic diagram of the assembly of the side area air volume adjustment component, the profile body, and the end plate in the present invention.

[0048] Figure 7 This is a structural diagram of the side area air volume adjustment component from the first perspective of the present invention.

[0049] Figure 8 This is a structural diagram of the side area air volume adjustment component from the second perspective of the present invention.

[0050] In the figure: 10-blowing box body, 100-constant pressure chamber, 110-steady flow chamber, 120-tapered channel, 130-contraction hole, 11-profile body, 12-side plate, 13-end plate, 14-inlet pipe, 15-fixed pipe, 16-edge air volume adjustment component, 17-sealing plate, 131-arc edge, 111-first block part, 112-second block part, 113-third block part, 114-inlet pipe, 115-fixed pipe, 116-first positioning part, 117-second positioning part, 118-positioning groove, 161-cover, 162-rotating shaft, 163-wind shield, 164-handle, 165-cover plate, 166-limiting column, 167-duct. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0052] Please see the attached Figure 1-3 The present invention provides a three-sided air supply bag area stabilizing paper blow box, which is arranged in a bag area formed by a paper feed side drying cylinder, a dryer mesh guide roller, and a dryer mesh drying cylinder. The paper web path between the paper feed side drying cylinder and the dryer mesh guide roller is a dryer mesh running section, and the two ends of the dryer mesh running section are respectively a paper feed end and a paper discharge end. The three-sided air supply bag area stabilizing paper blow box includes a blow box body 10, a constant pressure chamber 100 is formed inside the blow box body 10, and profile bodies 11 are respectively provided on three sides of the blow box body 10, and a steady flow chamber 110 is formed inside the profile body 11, one side of the steady flow chamber 110 is communicated with the constant pressure chamber 100, and a tapering channel 120 is formed on the other side of the steady flow chamber 110, and the outlet of the tapering channel 120 is communicated with the atmosphere, so that the airflow passes through the constant pressure chamber 100, the steady flow chamber 110, and the tapering channel 120 in sequence and is blown out;

[0053] In the first profile body 11, the profile body 11 corresponds to the paper feed end of the dryer fabric running section, the airflow direction of the outlet of the tapered channel 120 is opposite to the feeding direction of the drying cylinder on the paper feed side, and a negative pressure area at the paper feed end is formed between the profile body 11 and the paper feed end;

[0054] In the second profile body 11, the profile body 11 corresponds to the paper discharge end of the dryer fabric running section, the airflow direction at the outlet of the tapered channel 120 is opposite to the feeding direction of the dryer fabric guide roller, and a negative pressure area at the paper discharge end is formed between the profile body 11 and the paper discharge end;

[0055] In the third profile body 11, the profile body 11 corresponds to the dryer wire guide roller and the dryer wire drying cylinder, the air flow direction at the outlet of the tapered channel 120 is opposite to the feed direction of the dryer wire drying cylinder, and a pocket air supply area is formed between the profile body 11, the dryer wire guide roller and the dryer wire drying cylinder;

[0056] Among them, the negative pressure area at the paper outlet end is connected with the air supply area of ​​the bag area.

[0057] In a specific embodiment, as shown in the attached Figure 1 As shown, the hot gas entering the constant pressure chamber 100 flows out in three parts;

[0058] The first part of the hot air is discharged upward from the paper feed end on the upper side of the paper feed side dryer, preventing the air running with the paper web from entering the gap between the blow box body 10 and the paper web, thereby forming a paper feed end negative pressure zone in the gap, so that the paper web and the dryer fabric are in a close contact state when the paper feed end runs downward; the second part of the hot air is discharged to the right from the paper discharge end on the lower side of the paper feed side dryer, preventing the air running with the dryer fabric guide roller from entering the gap between the paper web and the blow box body 10, thereby forming a paper discharge end negative pressure zone in the gap, so that the paper web and the dryer fabric are in a close contact state when the paper discharge end runs downward; thus, the double air outlet of the paper feed side dryer is realized by utilizing the paper feed end negative pressure zone and the paper discharge end negative pressure zone, meeting the paper stabilization requirement at high vehicle speeds;

[0059] The third part of the hot air is discharged downward from the right side of the blow box body 10, firstly forming an air knife seal to prevent the hot air from flowing upward and running out of the bag area. Secondly, the hot air flows downward to form the bag area air supply area to increase the temperature of the dryer fabric and prevent the generation of condensation water due to the low temperature of the bag area air supply area.

[0060] At the same time, since the negative pressure area at the paper outlet is connected to the bag area air supply area, the second part of the air flow is directed toward the bag area air supply area, so it is driven by the third part of the air flow and merges with the third part of the air flow downward, realizing the secondary utilization of part of the hot air and reducing energy loss.

[0061] In another specific embodiment, as shown in the attached Figure 2 and 3 As shown, the present application realizes the three-chamber steady flow of hot air by designing the structure of the profile body. The gas entering the constant pressure chamber 100 is initially mixed in the constant pressure chamber 100, and then divided into three parts to enter the independent steady flow chambers 110 for another steady flow, and finally blown out of the blow box body 10 from the tapering channel 120 for the third steady flow. The space of the steady flow chamber 110 is independent and separated from the constant pressure chamber 110. The hot air is mixed twice in the constant pressure chamber 100 and the steady flow chamber 110, reducing the wind pressure loss; the tapering channel 120 gradually narrows, and the hot air after pressure stabilization is accelerated from the tapering channel 120 to blow out of the blow box body 10, increasing the air supply pressure of the hot air, thereby increasing the negative pressure to meet the paper web attachment requirements at high vehicle speeds.

[0062] Please refer to the attached Figure 3 The profile body 11 includes a first stopper 111, a second stopper 112, a third stopper 113, a fourth stopper 114, and a fifth stopper 115; one end of the first stopper 111 is connected to the second stopper 112, the third stopper 113, and the fourth stopper 114 in sequence, and the other end of the first stopper 111 is connected to the fifth stopper 115. The first stopper 111, the second stopper 112, the third stopper 113, and the fourth stopper 114 form a steady flow cavity 110; a contraction hole 130 is provided on the first stopper 111 to allow the airflow to flow from the constant pressure cavity 100 to the constant pressure cavity 100. Accelerate into the stabilizing chamber 110; the third stopper 113 and the fifth stopper 115 are located on the same side of the first stopper 111 and are arranged opposite to each other; one end of the fifth stopper 115 extends toward the side of the third stopper 113 away from the first stopper 111, so that a tapering channel 120 connected to the stabilizing chamber 110 is formed between the third stopper 113 and the fifth stopper 115; the outer surface of the third stopper 113 and the inner surface of the fifth stopper 115 are respectively arc-shaped, so that the airflow flows tangentially along the inner surface of the fifth stopper 115 toward the outer surface of the third stopper 113.

[0063] It can be understood that the profile body 11 is an integrated structure, and the flow stabilization cavity 110 exists independently inside the profile body 11; the hot air that is accelerated into the flow stabilization cavity 110 through the contraction hole 130 is mixed again, making the hot air flow velocity more uniform and reducing the wind pressure loss; after the hot air is mixed, it is accelerated to be discharged along the tapered channel 120 formed between the arc-shaped inner surface of the fifth stop 115 and the arc-shaped outer surface of the third stop 113; the contraction hole 130 of the present application corresponds to the fifth stop 115, and the arc-shaped inner surface of the fifth stop 115 also has a guiding function, reducing the turbulence to the hot air, so that the hot air is accelerated and evenly discharged from the blow box body 10.

[0064] Furthermore, the profile body 11 is an integrally formed aluminum structure; if carbon steel material is selected, the carbon steel needs to be welded together in multiple sections under wide width, the width of the gap channel 120 at the weld is easily affected, and the welded profile is easily deformed. The use of aluminum profiles can ensure that the width of the tapering channel 120 is uniform even if it does not need to be welded like carbon steel and other profiles under wide width, thereby achieving uniform air outlet. At the same time, it is light in texture and reduces the difficulty of assembly.

[0065] In a specific embodiment, the contraction hole 130 is a trumpet hole or a conical hole, with a larger opening on the side close to the constant pressure chamber 100 and a smaller opening on the side close to the steady flow chamber 110, which is conducive to the hot air entering the steady flow chamber 110; the width of the tapering channel 120 is smaller than the minimum diameter of the contraction hole 130, so that the hot air in the steady flow chamber 110 is accelerated and pressurized and quickly discharged from the tapering channel 120.

[0066] In order to improve the structural strength of the profile body 11 at the tapering channel 120, the fourth baffle 114 extends toward the first baffle 111, and its extension line intersects with the first baffle 111; the fourth baffle 114 can block part of the airflow, allowing most of the airflow to be discharged directly from the tapering channel 120, preventing the hot air from flowing in a spiral shape in the stabilizing flow cavity 110, reducing the movement path of the hot air, and reducing heat loss.

[0067] In this application, please see the attached Figure 4 and 5 The specific structure of the blowing box body 10 is as follows: the blowing box body 10 also includes three side panels 12, two end panels 13, an air inlet pipe 14, and a fixed pipe 15; the three side panels 12 are alternately connected to the three profile bodies 11 to surround the side of the blowing box body 10; the two end panels 13 are respectively arranged at both ends of the side panels 12 to form the end faces of the blowing box body 10; the air inlet pipe 14 is connected to one of the end panels 13 and is connected to the constant pressure chamber 10; the fixed pipe 15 is connected to the other end panel 13 and is coaxially arranged with the air inlet pipe 14.

[0068] As can be seen, the blow box body 10 is a spliced ​​structure, while the profile body 11, as an integrally formed independent structure, is more convenient to combine with other components. Furthermore, the flow stabilization chamber 110 is not restricted by the shape of the blow box body 10, ensuring a stable flow. In one embodiment, the three side panels 12 have different shapes because the space in the bag area of ​​the blow box body 10 is limited. They need to coordinate with the position of the paper feed side dryer cylinder, the position of the dryer wire guide roller, and the position of the dryer wire dryer cylinder. Therefore, in principle, the shape of the side panels 12 can be modified to suit different space constraints, but the profile body 11 must be installed in a consistent position in the bag area.

[0069] Specifically, when implementing the installation, it can be understood that the blow box body 10 is laid along the axial direction of the paper feeding side drying cylinder, and the shrinkage holes 130 are arranged at equal intervals along the length direction of the profile body 11. The hot air enters the steady flow cavity 110 through the equally spaced shrinkage holes 130 and is then discharged through the tapering channel 120 along the length direction of the entire profile body 11.

[0070] In addition, in order to facilitate the connection between the profile body 11 and the side plate 12, please refer to the attached Figure 2 and 3 The profile body 11 also includes a first positioning portion 116 and a second positioning portion 117; the first positioning portion 116 is arranged on the side of the second stop portion 112 away from the first baffle 11, and is used to connect one of the side panels 12 adjacent to the profile body 11; the second positioning portion 117 is arranged on the side of the fifth stop portion 115 away from the first baffle 111, and is used to connect another one of the side panels 12 adjacent to the profile body 11.

[0071] Specifically, it is understood that in the profile body 11 and its two adjacent side panels 12, the first positioning portion 116 is provided with a plurality of positioning holes at intervals along the length direction of the profile body 11, and one side of the side panel 12 is connected to the plurality of positioning holes in sequence by a plurality of bolts to realize the fixed connection between the profile body 11 and one of the side panels 12; the second positioning portion 117 is provided with a plurality of positioning grooves 118 at intervals along the length direction of the profile body 11, and the positioning grooves 118 are T-shaped for hiding the placement of bolts, and a plurality of positioning holes are opened on the other adjacent side panel 12. By placing a plurality of bolts into the positioning grooves 118, the profile body 11 and the other adjacent side panel 12 are fixed with nuts until the side splicing of the entire blow box body 10 is completed.

[0072] As a specific embodiment of the present application, in order to make the end plate 13 more suitable for the dryer wire guide roller, the blow box body 10 can be located on the dryer wire guide roller to achieve convenient positioning of the blow box body 10, please refer to the attached Figure 2 and 4 The edge of the end plate 13 is configured as an arc edge 131, and the center of the arc edge 131 is located on the axis of the dryer guide roller.

[0073] Please see the attached Figure 6-8 , a side area air volume regulating assembly 16 is provided at the side areas at both ends of the constant pressure chamber 100, near the side of the dryer net drying cylinder, and the side area air volume regulating assembly 16 includes a cover 161, a rotating shaft 162, a windshield 163, a handle 164, a cover 165, and two limiting columns 166; the cover 161 is located in the side area of ​​the constant pressure chamber 100, one end of which covers the profile body 11 and the other end abuts the end plate 13, and an air volume regulating port is provided on the cover 161; the rotating shaft 162 is rotatably connected to the end plate 13, and its One end extends along the cover shell 161; the wind shield 163 is located in the air volume adjustment port and is connected to the rotating shaft 162; the handle 164 is located on the outside of the end plate 13 and is connected to the rotating shaft 162; the cover plate 165 is located on the outside of the blow box body 10 and is fixed on the end plate 13, and the rotating shaft 162 passes through the cover plate 165; two limiting columns 166 are set to place the cover plate 165 away from the side of the blow box body 13 and distributed on both sides of the rotating shaft 162, and the handle 164 can swing between the two limiting columns 166.

[0074] When using a guide roller that generates deflection, the sides are subjected to the greatest pressure during the pressing nip, while the middle section is subject to little or no pressure due to a gap between the middle section and the paper web. This results in a problem where the moisture content in the middle of the paper web is high and the moisture content on the sides is low. To address the problem of uneven moisture content in the paper web and deformation of the paper web when the guide roller is applied, the air volume in the side sections is adjusted to meet the drying requirements of different sections, achieving uniform moisture content across the paper web before it exits the bagging area. By adjusting the air volume in the side sections at both ends of the constant pressure chamber 100, the profile body 11 on the side close to the dryer net cylinder experiences high air volume in the middle of the tapered channel 120 and low air volume on the sides, thereby accelerating the evaporation of moisture in the middle section of the paper web and addressing the uneven moisture content in the paper web.

[0075] In a specific embodiment, the handle rotates the shaft 162 to drive the wind shield 163 to rotate and adjust the size of the air volume adjustment port. The limit column 166 limits the swing amplitude of the handle 164. A small amount of hot air enters the cover 161 from the air volume adjustment port and then enters the stabilizing chamber 110. A large part of the hot air directly enters the stabilizing chamber 110. Finally, the hot air flowing out of the tapering channel 120 is small on both sides and large in the middle, corresponding to the situation where the moisture content in the middle of the paper web is large and the moisture content on both sides is small, thereby accelerating the evaporation of moisture in the middle of the paper web.

[0076] Furthermore, in order to further achieve hot air diversion, a duct 167 is provided at the air volume adjustment port of the cover shell 161 and on the side away from the profile body 11.

[0077] Furthermore, in order to achieve sealing between the two ends of the blow box body 10 and the paper feed side drying cylinder and the dryer mesh drying, the end plate 13 is located on one side of the paper feed side drying cylinder and / or on one side of the dryer mesh drying cylinder. A sealing plate 17 is provided; the sealing plate 17 is a composite of a silicone rubber pad and a Teflon plate with a thickness of 5mm-10mm, and is fixed to the end plate 13 by screws to prevent heat from escaping from the gap between the end plate 13 and the drying cylinders on both sides.

[0078] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A three-sided air supply bag area paper stabilization blow box, arranged in a bag area formed by a paper feed side drying cylinder, a dryer fabric guide roller, and a dryer fabric drying cylinder. The paper web path between the paper feed side drying cylinder and the dryer fabric guide roller is a dryer fabric running section, and the two ends of the dryer fabric running section are the paper feed end and the paper discharge end, respectively. Characteristics: The invention comprises a blow box body (10), wherein a constant pressure chamber (100) is formed inside the blow box body (10), and profile bodies (11) are respectively provided on three sides of the blow box body (10), wherein a steady flow chamber (110) is formed inside the profile body (11), wherein one side of the steady flow chamber (110) is communicated with the constant pressure chamber (100), and the other side of the steady flow chamber (110) forms a tapering channel (120), and the outlet of the tapering channel (120) is communicated with the atmosphere, so that the airflow passes through the constant pressure chamber (100), the steady flow chamber (110), and the tapering channel (120) in sequence and is blown out; In the first profile body (11), the profile body (11) corresponds to the paper feed end of the dryer mesh running section, the air flow direction of the outlet of the tapered channel (120) is opposite to the feeding direction of the drying cylinder on the paper feed side, and a negative pressure area at the paper feed end is formed between the profile body (11) and the paper feed end; In the second profile body (11), the profile body (11) corresponds to the paper outlet end of the dryer mesh running section, the air flow direction of the outlet of the tapered channel (120) is opposite to the feeding direction of the dryer mesh guide roller, and a negative pressure area at the paper outlet end is formed between the profile body (11) and the paper outlet end; In the third profile body (11), the profile body (11) corresponds to the dryer mesh guide roller and the dryer mesh drying cylinder, the air flow direction of the outlet of the tapered channel (120) is opposite to the feed direction of the dryer mesh drying cylinder, and a pocket air supply area is formed between the profile body (11), the dryer mesh guide roller, and the dryer mesh drying cylinder, and the negative pressure area at the paper outlet is connected to the pocket air supply area; The profile body (11) comprises a first stopper (111), a second stopper (112), a third stopper (113), a fourth stopper (114), and a fifth stopper (115); One end of the first stopper (111) is connected to the second stopper (112), the third stopper (113), and the fourth stopper (114) in sequence, and the other end of the first stopper (111) is connected to the fifth stopper (115). The first stopper (111), the second stopper (112), the third stopper (113), and the fourth stopper (114) form a steady flow cavity (110). The first blocking portion (111) is provided with a contraction hole (130) to accelerate the airflow from the constant pressure chamber (100) into the steady flow chamber (110); The third stopper (113) and the fifth stopper (115) are located on the same side of the first stopper (111) and are arranged opposite to each other; One end of the fifth stopper (115) extends toward a side of the third stopper (113) away from the first stopper (111), so that a tapering channel (120) communicating with the steady flow cavity (110) is formed between the third stopper (113) and the fifth stopper (115); The outer surface of the third stopper (113) and the inner surface of the fifth stopper (115) are respectively arc-shaped, so that the airflow flows tangentially along the inner surface of the fifth stopper (115) toward the outer surface of the third stopper (113).

2. The three-sided air bag area stabilizing blow box according to claim 1, characterized in that: The fourth stop portion (114) extends toward the first stop portion (111), and an extension line thereof intersects with the first stop portion (111).

3. The three-sided air supply bag area paper stabilization blowing box according to claim 1 is characterized in that: The blowing box body (10) also includes Three side panels (12) are alternately connected to the three profile bodies (11) to enclose the side surfaces of the blowing box body (10); Two end plates (13) are respectively arranged at both ends of the side plate (12) to form end surfaces of the blowing box body (10); An air inlet pipe (14) connected to one of the end plates (13) and communicating with the constant pressure chamber (100); The fixed pipe (15) is connected to the other end plate (13) and is coaxially arranged with the air inlet pipe (14).

4. The three-sided air supply bag area paper stabilization blowing box according to claim 3 is characterized by: The profile body (11) also includes A first positioning portion (116) is provided on a side of the second stop portion (112) away from the first stop portion (111), and is used to connect to one of the side panels (12) adjacent to the profile body (11); The second positioning portion (117) is provided on a side of the fifth stop portion (115) away from the first stop portion (111) and is used to connect to another of the side panels (12) adjacent to the profile body (11).

5. The three-sided air supply bag area paper stabilization blow box according to claim 3, characterized in that: The edge of the end plate (13) is configured as an arc edge (131), and the center of the arc edge (131) is located on the axis of the dryer wire guide roller.

6. The three-sided air supply bag area paper stabilization blowing box according to claim 3, characterized in that: A side area air volume regulating assembly (16) is provided at the side areas at both ends of the constant pressure chamber (100) and on one side close to the drying net drying cylinder. The side area air volume regulating assembly (16) includes A cover (161) is located at the edge of the constant pressure chamber (100), with one end covering the profile body (11) and the other end abutting against the end plate (13), and an air volume regulating port is provided on the cover (161); A rotating shaft (162) is rotatably connected to the end plate (13), one end of which extends along the cover (161); A windshield (163) is located in the air volume regulating port and is connected to the rotating shaft (162); The handle (164) is located outside the end plate (13) and is connected to the rotating shaft (162).

7. The three-sided air supply bag area paper stabilization blowing box according to claim 6, characterized in that: The side area air volume regulating component (16) also includes A cover plate (165) is located outside the blowing box body (10) and fixed on the end plate (13), and the rotating shaft (162) passes through the cover plate (165); Two limiting posts (166) are provided, and the cover plate (165) is arranged away from the side of the blow box body (13) and distributed on both sides of the rotating shaft (162). The handle (164) can swing between the two limiting posts (166).

8. The three-sided air supply bag area paper stabilization blowing box according to claim 6, characterized in that: A duct (167) is provided at the air volume regulating port of the cover shell (161) and on the side away from the profile body (11).

9. The three-sided air supply bag area paper stabilization blowing box according to claim 3, characterized in that: The end plate (13) is located on one side of the paper feed side drying cylinder and / or is located on one side of the dryer network drying cylinder and is provided with a sealing plate (17).

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