Negative pressure paper stabilizing mechanism for paper machine

Abstract

The utility model relates to the technical field of papermaking equipment, in particular to a negative pressure paper stabilizing mechanism for a papermaking machine, which comprises a paper stabilizing box, the paper stabilizing box is of a hollow box body structure with a narrow upper part and a wide lower part, the left and right side walls of the paper stabilizing box are respectively parallel to paper surfaces on two sides, and the left and right side walls of the paper stabilizing box are also provided with adsorption ports; the number of the sealing strips is four, and the four sealing strips are located at the upper end and the lower end of the left side wall and the right side wall of the paper stabilizing box correspondingly and used for being attached to the dry net; according to the utility model, the paper stabilizing box is arranged, and negative pressure can be formed in the areas on the two sides of the paper stabilizing box, so that air between a paper surface and a dry net is adsorbed, the paper surface can be attached to the dry net, and wrinkles are reduced.

Description

Technical Field

[0001] This utility model relates to the field of papermaking equipment technology, specifically to a negative pressure paper stabilizing mechanism for a papermaking machine. Background Technology

[0002] In modern papermaking, the paper surface needs to be dried. However, there is a certain gap between adjacent drying cylinders in the drying section of a paper machine. When the wire carries the paper surface at high speed, air is introduced. This air enters the space between the paper surface and the wire, forming air bubbles. This eventually causes the paper to wrinkle, resulting in paper defects or breaks, thus reducing production efficiency.

[0003] Specifically, such as Figure 1 The diagram shows a schematic of an existing drying section, which has three drying cylinders arranged in a triangular shape. After the paper and wire leave the first drying cylinder, the high-speed movement introduces airflow, creating gaps between the paper and the wire. These gaps disrupt the tight fit between the paper and the wire, leading to reduced stability of the paper web as it moves between the two drying cylinders and making it prone to wrinkling. This process repeats itself as the paper continues to move, causing frequent wrinkling and severely impacting paper quality and production efficiency. Therefore, we propose a negative pressure paper stabilizing mechanism for paper machines to effectively address these drawbacks. Utility Model Content

[0004] The purpose of this invention is to provide a negative pressure paper stabilizing mechanism for a papermaking machine, which solves the problems mentioned in the background art.

[0005] This utility model is achieved through the following technical solution: a negative pressure paper stabilizing mechanism for a papermaking machine, comprising:

[0006] The paper box is a hollow box structure that is narrow at the top and wide at the bottom. The left and right side walls of the paper box are parallel to the paper surfaces on both sides, and the left and right side walls of the paper box also have suction ports.

[0007] The sealing strip consists of four pieces, which are located at the upper and lower ends of the left and right side walls of the cardboard box, respectively, for bonding with the dryer mesh.

[0008] The exhaust fan has its exhaust end connected to the interior of the cardboard box via a pipe.

[0009] Optionally, the inside of the paper box is provided with a negative pressure pipe, and the wall of the negative pressure pipe is evenly provided with a number of air holes. The top of the negative pressure pipe is also provided with an air inlet, which passes through the paper box and is connected to the air extraction end of the exhaust fan.

[0010] Optionally, the number of adsorption ports on both sides of the paper box is 2-5, and the adsorption ports are elongated, with the length direction of the adsorption port aligned with the width direction of the paper surface.

[0011] Optionally, the outer surface of the cardboard box is provided with blocking parts on both the front and rear sides, and the two blocking parts are respectively located on both sides of the paper surface.

[0012] Optionally, an air blowing section is provided between two blocking sections on the same side of the cardboard box. The air blowing section has a hollow structure, and air blowing holes are evenly opened on the side of the air blowing section facing the cardboard box. The air blowing section is also connected to the air outlet of the exhaust fan.

[0013] Optionally, the air blowing section between the two blocking sections on the same side of the cardboard box is two pieces, and the two air blowing sections are located at the upper and lower ends of the blocking section, respectively.

[0014] Compared with the prior art, this utility model provides a negative pressure paper stabilizing mechanism for a papermaking machine, which has the following beneficial effects:

[0015] 1. This utility model has a paper stabilizing box, which can form negative pressure in both sides, thereby adsorbing the air between the paper surface and the dry wire, allowing the paper surface to adhere to the dry wire, thereby reducing the occurrence of wrinkles;

[0016] 2. The same side of the stable cardboard box of this utility model has two sealing strips and two blocking parts, which help to form a relatively sealed area between the paper surface and the side wall of the stable cardboard box, thereby making full use of negative pressure to absorb the air in the dry net and paper surface parts, and further reducing the probability of wrinkles on the paper surface. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the current state of the drying section;

[0018] Figure 2 This is a schematic diagram of the structure of this utility model;

[0019] Figure 3 This is a cross-sectional view of the stable cardboard box structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the stable cardboard box structure of this utility model;

[0021] Figure 5 for Figure 3 Enlarged view of point A in the middle.

[0022] In the diagram: 100, cardboard box; 101, suction port; 102, blocking part; 103, air blowing part; 104, air blowing hole; 200, sealing strip; 300, exhaust fan; 400, negative pressure pipe; 500, first drying cylinder; 600, second drying cylinder; 700, third drying cylinder. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 2 - Figure 5 A negative pressure paper stabilizing mechanism for a papermaking machine includes a paper stabilizing box 100, a sealing strip 200, and an exhaust fan 300. The paper stabilizing box 100 is a hollow box structure that is narrow at the top and wide at the bottom. The left and right side walls of the paper stabilizing box 100 are parallel to the paper surfaces on both sides, and the left and right side walls of the paper stabilizing box 100 also have suction ports 101. The number of suction ports 101 on both sides of the paper stabilizing box 100 is 2 to 5, and the suction ports 101 are elongated, with the length direction of the suction ports 101 consistent with the width direction of the paper surface.

[0025] Specifically, the paper machine has a first drying cylinder 500, a second drying cylinder 600 and a third drying cylinder 700. The three drying cylinders are arranged in a triangular pattern, and the distance between the two drying cylinders at the top is smaller than the diameter of the bottom drying cylinder. The paper stabilizing box 100 is set between the three drying cylinders.

[0026] Furthermore, there are four sealing strips 200, located at the upper and lower ends of the left and right side walls of the paper stabilizing box 100, respectively, for bonding with the dryer wire. The exhaust end of the exhaust fan 300 is connected to the interior of the paper stabilizing box 100 via a pipe. The interior of the paper stabilizing box 100 is equipped with a negative pressure pipe 400, with several air holes evenly distributed on its wall. The top of the negative pressure pipe 400 also has an air inlet, which passes through the paper stabilizing box 100 and connects to the exhaust end of the exhaust fan 300. Therefore, under the suction of the exhaust fan 300, a negative pressure environment is generated inside the paper stabilizing box 100. Air in the sealed area between the side wall of the paper stabilizing box 100 and the dryer wire is also drawn away, as is air between the dryer wire and the paper. This results in better bonding between the paper and the dryer wire, reducing bubbles and effectively ensuring smooth paper movement and eliminating wrinkles.

[0027] The sealing strip 200 helps to form a relatively sealed area between the paper surface and the side wall of the cardboard box 100, thereby helping to remove air between the paper surface and the dry wire, so that the paper surface adheres to the dry wire.

[0028] In another embodiment of this application, the outer surface of the paper box 100 is provided with a blocking part 102 on both the front and rear sides. The two blocking parts 102 are respectively located on both sides of the paper surface, and the distance between the two blocking parts 102 is slightly larger than the width of the paper surface. Therefore, the setting of the blocking part 102 helps to form a sealed area between the paper surface and the side wall of the paper box 100.

[0029] Furthermore, an air blowing section 103 is provided between the two blocking sections 102 on the same side of the cardboard box 100. The air blowing section 103 has a hollow structure, and air blowing holes 104 are evenly distributed on the side of the air blowing section 103 facing the cardboard box 100. The air blowing section 103 is also connected to the air outlet of the exhaust fan 300. There are two air blowing sections 103 between the two blocking sections 102 on the same side of the cardboard box 100, and the two air blowing sections 103 are located at the upper and lower ends of the blocking sections 102, respectively. Specifically, a connecting pipe is provided on one of the blocking sections 102. The connecting pipe has three ports, two of which are connected to the two air blowing sections 103, and the other port is connected to the air outlet of the exhaust fan 300. Therefore, when the exhaust fan 300 is turned on, positive pressure can be formed in the air blowing section 103, which in turn causes the gas to be sprayed out from the air blowing hole 104 and act on the paper surface, so that the paper surface and the dry wire can fit more closely to the side wall of the paper box 100, which further helps to reduce the gaps formed between the paper surface and the dry wire.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A negative pressure sheeting mechanism for a paper machine, characterized in that, Include: Stable carton (100), the stable carton (100) is the hollow box structure of narrow top and wide bottom, the left and right two side walls of stable carton (100) are parallel to the paper surface of two sides respectively, and the left and right two side walls of stable carton (100) also have suction port (101) on it; Sealing strip (200), the sealing strip (200) has four pieces in common, and four sealing strips (200) are respectively located at the upper and lower ends of the left and right side walls of stable carton (100), for being attached with dry net; Suction fan (300), the suction end of suction fan (300) is communicated with the inside of stable carton (100) through pipeline.

2. A negative pressure sheeting mechanism for a paper machine as claimed in claim 1, characterized in that: The inside of the stable carton (100) is provided with a negative pressure pipe (400), a plurality of air holes are uniformly arranged on the pipe wall of the negative pressure pipe (400), and the top of the negative pressure pipe (400) is further provided with an air inlet end, which penetrates through the stable carton (100) and is connected with the suction end of the suction fan (300).

3. A negative pressure sheeting mechanism for a paper machine as claimed in claim 1, wherein: The number of suction ports (101) on both sides of the stable carton (100) is 2-5, and the suction port (101) is in the shape of a long strip, the length direction of the suction port (101) is consistent with the width direction of the paper surface.

4. A negative pressure sheeting mechanism for a paper machine as claimed in claim 1, wherein: The outer surface of the stable carton (100) is provided with blocking parts (102) on the front and rear sides, and the two blocking parts (102) are respectively located on both sides of the paper surface.

5. A negative pressure sheeting mechanism for a paper machine as claimed in claim 4, wherein: The blowing part (103) is provided between the two blocking parts (102) on the same side of the stable carton (100), the blowing part (103) is a hollow structure, the blowing part (103) is provided with blowing holes (104) on the side of the stable carton (100) uniformly, and the blowing part (103) is also connected with the air outlet end of the suction fan (300).

6. A negative pressure sheeting mechanism for a paper machine as claimed in claim 5, wherein: The blowing part (103) between the two blocking parts (102) on the same side of the stable carton (100) is two pieces, and the two blowing parts (103) are respectively located at the upper and lower ends of the blocking part (102).

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