Paper machine blowing box and paper machine

Abstract

The utility model discloses a blowing box of a paper machine and the paper machine, and the blowing box of the paper machine comprises a blowing box body located between the upstream side and the downstream side of a dry net; a baffle is arranged on the edge of the side, close to the upstream side, of the air blowing box body. The baffle extends in the direction close to the uplink side of the dry net. Negative pressure can be formed between the blowing box and the upward side of the dry net, so that paper on the upward side can be attached to the dry net under the action of the negative pressure, speed increase of the paper machine is facilitated, and paper breakage of the paper machine is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of paper machine parts, in particular to a paper machine blowing box and a paper machine. Background Art

[0002] The blow box is an important component of the paper machine. It is installed at the vacuum roller and located between the drying cylinders on both sides. The two sides of the blow box are the upper side dryer mesh and the lower side dryer mesh respectively.

[0003] In the prior art, the YMRUN blow box is designed to be open on the upper side. Due to the open design of the upper side, the paper on the upper side does not stick to the dryer net, causing difficulties in speeding up the paper machine and paper breaks in the paper machine.

[0004] How to avoid the difficulty in speeding up and paper breaks on the paper machine caused by the upstream side paper not sticking to the dryer wire is one of the important issues to be solved urgently in this field. Utility Model Content

[0005] The utility model aims to provide a paper machine blow box and a paper machine to solve the problems in the prior art, and can form a negative pressure between the blow box and the upstream side of the dryer network, so that the paper at the upstream side can be attached to the dryer network under the action of the negative pressure, which is beneficial to speeding up the paper machine and avoiding paper breaks in the paper machine.

[0006] The utility model provides a paper machine blowing box, which includes:

[0007] A blow box body is located between the upstream side and the downstream side of the dryer net; a baffle is provided at the edge of the blow box body on one side close to the upstream side;

[0008] The baffle extends toward an upward side of the dryer fabric.

[0009] As described above, in the paper machine blow box, optionally, the baffle extends out of the blow box body on a side close to the upstream side by a length of 3 to 7 centimeters.

[0010] As described above, in the paper machine blow box, optionally, the baffle extends out of the blow box body by a length of 5 centimeters on a side close to the upstream side.

[0011] As described above, in the paper machine blow box, optionally, the baffle is bolted or welded to the blow box body.

[0012] The paper machine blow box as described above, wherein, optionally, the baffle comprises a top baffle and a side baffle;

[0013] The top baffle is arranged at the top of the blowing box body near the edge of the upward side;

[0014] The side baffle is arranged on the edge of the side plate of the blowing box body close to the upward side.

[0015] As described above, in the paper machine blow box, optionally, there are two side baffles, and the two side baffles extend from the two ends of the top baffle from top to bottom along the length direction of the upward side.

[0016] As described above, in the paper machine blow box, optionally, the air outlet of the blow box body is arranged on a side close to the downstream side.

[0017] As described above, in the paper machine blow box, optionally, the air inlet of the blow box body is arranged on a side of the blow box body close to the upstream side.

[0018] The utility model also provides a paper machine, which comprises the paper machine blowing box described in any one of the above items.

[0019] The paper machine as described above, wherein it further comprises at least two drying cylinders and a vacuum roll;

[0020] The center lines of the two drying cylinders and the vacuum roller are arranged in parallel;

[0021] The blow box body is located between the two drying cylinders, and the vacuum roller is located below the blow box body;

[0022] The dryer fabric sequentially passes around the drying cylinder on one side of the blow box body, the vacuum roller and the drying cylinder on the other side of the blow box body;

[0023] The baffle is used to form a negative pressure space between the upstream side of the dryer net and the blow box body.

[0024] Compared with the prior art, the present invention has at least the following beneficial effects:

[0025] The utility model provides a baffle plate at the top of the blow box body near the edge of the upward side of the dryer net, so that the gap between the blow box body and the dryer net can be reduced, which is beneficial to increase the negative pressure between the upward side of the dryer net and the blow box body, so that the paper on the upward side can still be attached to the dryer net, so that the paper can smoothly enter the next drying cylinder after being attached to the dryer net. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall structure of the paper machine blowing box proposed by the utility model;

[0027] Figure 2 It is a partial enlarged schematic diagram of the blowing box body proposed by the utility model.

[0028] Figure 3 It is a schematic diagram of the utility model.

[0029] Description of reference numerals:

[0030] 1-drying net, 2-upward side, 3-downward side, 4-blow box body, 5-top baffle, 6-side baffle, 7-drying cylinder, 8-vacuum roller. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be interpreted as limiting the present invention.

[0032] Aiming at the problems in the background technology, the reason for the difficulty in speeding up the paper machine and the paper breaking of the paper machine is that the paper is not attached to the dryer net on the upstream side of the dryer net. In order to make the paper on the upstream side stick to the dryer net, the utility model makes the following improvements.

[0033] Example 1

[0034] Please refer to Figures 1 to 3 , this embodiment provides a paper machine blow box, which includes a blow box body 4 located between the upstream side 2 and the downstream side 3 of the dryer fabric 1; a baffle is provided at the edge of the blow box body 4 on the side close to the upstream side 2. Specifically, the dryer fabric 1 sequentially bypasses the drying cylinder 7 on one side, the vacuum roller 8 and the drying cylinder 7 on the other side. The portion of the dryer fabric 1 located between the vacuum roller 8 and the drying cylinders 7 on both sides is divided into an upstream side 2 and a downstream side 3 according to its running direction, and the blow box body 4 is located between the upstream side 2 and the downstream side 3. It should be pointed out that, Figure 1 In order to facilitate the understanding of the arrangement of the baffle in the present application, only the baffle on the top of the blowing box body 4 is shown.

[0035] In the prior art, an air outlet is provided on the side of the blow box body 4 facing the downstream side 3. The air outlet is along the side close to the downstream side 3. When the gas from the air outlet is blown upward, it drives the gas flow below, thereby forming a negative pressure between the downstream side 3 and the blow box body 4, so that the paper and the dryer net 1 are attached, thereby avoiding wrinkles when the paper enters the vacuum roller 8 with the dryer net 1. Since the blow box body 4 is open-type on the side close to the upstream side 2, it is difficult to form a negative pressure, resulting in the separation of the paper entering the upstream side 2 from the vacuum roller 8 and the dryer net, thereby causing difficulties in speeding up the paper machine and paper breaking in the paper machine. In this embodiment, by adding a baffle on the side of the blow box body 4 close to the upstream side 2, the gap between the upstream side of the dryer net 1 and the blow box body 4 can be reduced, thereby forming a vacuum chamber between the blow box body 4 and the upstream side of the dryer net 1, so that the paper can be attached to the dryer net 1.

[0036] The baffle extends toward the direction of the upstream side 2 of the dryer net 1. Such a setting can reduce the gap between the dryer net 1 and the baffle, so as to increase the air intake resistance, which is conducive to forming a negative pressure between the upstream side of the dryer net 1 and the blow box body 4. In specific implementation, the gap between the baffle and the dryer net should preferably be no larger than 1 cm. In specific implementation, the distance between the baffle and the dryer net 1 can be set small enough to achieve the required vacuum degree while avoiding interference between the baffle and the dryer net 1. It should be pointed out that, at the upstream side, the smaller the distance between the baffle and the dryer net 1, the easier it is to form a higher vacuum degree. In actual implementation, the distance between the baffle and the dryer net 1 can be set as needed. For example, the gap between the baffle and the dryer net 1 can be 0.1 cm, 0.2 cm, 0.3 cm, 0.4 cm, 0.5 cm, 0.6 cm, 0.7 cm, 0.8 cm, 0.9 cm, etc.

[0037] In some implementations, the length of the baffle extending from the side of the blow box body 4 close to the upstream side 2 is 3 to 7 centimeters. In a specific implementation, the length of the baffle extending from the side of the blow box body 4 close to the upstream side 2 can be 4 centimeters, 5 centimeters, or 6 centimeters. In a preferred implementation, the length of the baffle extending from the side of the blow box body 4 close to the upstream side 2 is 5 centimeters.

[0038] In the specific implementation, in order to be connected together, the baffle is bolted or welded to the blow box body 4. In practical applications, the connection between the baffle and the blow box body 4 is a fixed connection, which can be connected to the blow box body 4 close to the upstream side 2, or to the side and top of the blow box body 4 adjacent to the side facing the upstream side 2.

[0039] In a specific implementation, the baffle includes a top baffle 5 and a side baffle 6; the top baffle 5 is arranged at the top of the blowing box body 4 near the edge of the upward side 2; the side baffle 6 is arranged at the edge of the side plate of the blowing box body 4 near the upward side 2. The top baffle 5 and the side baffle 6 can be integrally formed or split. When the top baffle 5 and the side baffle 6 are split structures, the top baffle 5 and the side baffle 6 can be mutually abutted or have a small gap, such as a gap with a width of no more than 1 cm.

[0040] In a specific implementation, there are two side baffles 6, and the two side baffles 6 extend from the two ends of the top baffle 5 from top to bottom along the length direction of the upward side 2. In this way, through the top baffle 5 and the side baffles 6, the side of the blow box body 4 close to the upward side 2 can be modified from an open design to an air intake through a narrow gap, which is conducive to forming a vacuum area between the blow box body 4 and the upward side 2, thereby making the paper stick to the dryer mesh 1.

[0041] The air outlet of the blow box body 4 is arranged on a side close to the downstream side 3. Specifically, the air from the air outlet blows upward along the side of the blow box body 4 close to the downstream side 3. Driven by the airflow, the gas between the downstream side 3 and the blow box body 4 flows upward with the airflow, thereby forming a negative pressure between the downstream side 3 and the blow box body 4, so that the paper is attached to the dryer net 1. The air inlet of the blow box body 4 is arranged on a side of the blow box body 4 close to the upstream side 2. By setting a baffle, a negative pressure can be formed at the upstream side 2 of the blow box body 4 close to the dryer net 1, so that the paper at the upstream side 2 is attached to the dryer net, which can avoid problems such as difficulty in speeding up the paper machine and paper breakage in the paper machine.

[0042] Example 2

[0043] This embodiment is a specific application of embodiment 1, and the similarities are not repeated here, and only the differences are described below.

[0044] Please refer to Figure 1 This embodiment proposes a paper machine, which includes the paper machine blow box described in Example 1.

[0045] The drying machine further comprises at least two drying cylinders 7 and a vacuum roller 8; specifically, the center lines of the two drying cylinders 7 and the vacuum roller 8 are arranged in parallel.

[0046] The blow box body 4 is located between the two drying cylinders 7 , and the vacuum roller 8 is located below the blow box body 4 .

[0047] The dryer fabric 1 sequentially passes over the drying cylinder 7 on one side of the blow box body 4, the vacuum roller 8, and the drying cylinder 7 on the other side of the blow box body 4. The baffle is used to form a negative pressure space between the upstream side 2 of the dryer fabric 1 and the blow box body 4. By providing the baffle, a negative pressure space can be formed at the upstream side 2, so that the paper on the upstream side is attached to the dryer fabric 1.

[0048] The above describes in detail the structure, features and effects of the utility model based on the embodiments shown in the drawings. The above is only a preferred embodiment of the utility model, but the utility model is not limited to the scope of implementation shown in the drawings. Any changes made in accordance with the concept of the utility model, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the description and the drawings, should be within the protection scope of the utility model.

Claims

1. A paper machine blow box, characterized in that: include, A blow box body (4) is located between the upward side (2) and the downward side (3) of the dryer net (1); a baffle is provided at the edge of the blow box body (4) on one side close to the upward side (2); The baffle plate extends in a direction close to the upstream side (2) of the dryer net (1).

2. The paper machine blow box according to claim 1, characterized in that: The length of the baffle extending from the side of the blowing box body (4) close to the upward side (2) is 3 to 7 centimeters.

3. The paper machine blow box according to claim 2, characterized in that: The length of the baffle extending from the side of the blowing box body (4) close to the upward side (2) is 5 centimeters.

4. The paper machine blow box according to claim 1, characterized in that: The baffle is connected to the blowing box body (4) by bolts or welding.

5. The paper machine blow box according to claim 1, characterized in that: The baffle comprises a top baffle (5) and a side baffle (6); The top baffle (5) is arranged at the top of the blowing box body (4) near the edge of the upward side (2); The side baffle (6) is arranged on the edge of the side plate of the blowing box body (4) close to the upward side (2).

6. The paper machine blow box according to claim 5, characterized in that: The number of the side baffles (6) is two, and the two side baffles (6) extend from the two ends of the top baffle (5) from top to bottom along the length direction of the upstream side (2).

7. The paper machine blow box according to claim 1, characterized in that: The air outlet of the blowing box body (4) is arranged on a side close to the downstream side (3).

8. The paper machine blow box according to claim 1, characterized in that: The air inlet of the blowing box body (4) is arranged on a side of the blowing box body (4) close to the upward side (2).

9. A paper machine, characterized in that: A paper machine blow box comprising any one of claims 1-8.

10. The paper machine according to claim 9, characterized in that Also includes at least two drying cylinders (7) and a vacuum roller (8); The center lines of the two drying cylinders (7) and the vacuum roller (8) are arranged in parallel; The blowing box body (4) is located between the two drying cylinders (7), and the vacuum roller (8) is located below the blowing box body (4); The dryer net (1) sequentially passes around the drying cylinder (7) on one side of the blow box body (4), the vacuum roller (8), and the drying cylinder (7) on the other side of the blow box body (4); The baffle is used to form a negative pressure space between the upstream side (2) of the dryer net (1) and the blow box body (4).

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