A segmented dryer hood closure connection structure

Abstract

This utility model discloses a segmented airtight hood connection structure for the drying section of a paper machine, including a square-mouthed airtight hood section, a left end plate and a right end plate integrally formed on the outer walls of the left and right ends of the square-mouthed airtight hood section, and a grooved connection structure for connecting the left and right end plates. Internal threaded holes are provided at the corners of the right and left end plates, and bolts are installed in the internal threaded holes of the left end plate. A double-column anti-fall connection assembly is installed at the bottom end of the square-mouthed airtight hood section. This utility model, through the mutually cooperating structure of the square-mouthed airtight hood section, right end plate, left end plate, grooved connection structure, and double-column anti-fall connection assembly, allows the opposite ends of two adjacent square-mouthed airtight hood sections to slide together along the Z-axis via the grooved connection structure. The double-column anti-fall connection assembly self-supports the square-mouthed airtight hood sections to be connected until the two sections slide together, after which the bolts are used for final tightening.

Description

Technical Field

[0001] This utility model relates to the field of pipeline connection technology, specifically a segmented paper machine drying section sealed air hood connection structure. Background Technology

[0002] The enclosed air inlet hood design of the segmented paper machine drying section is designed to ensure uniform airflow distribution and efficient utilization during the drying process. Especially in multi-section air inlet pipe applications, its structure and connection method play a crucial role in the performance of the entire drying system. Multi-section air inlet pipes typically consist of several segments, each with a specific length and bending angle to accommodate the spatial layout and airflow path requirements of the drying section. Each pipe segment is equipped with an interface port; common connection methods include snap-fit, threaded, and flanged types. Each of these connection methods has its advantages and disadvantages, ensuring a tight and airtight connection to prevent airflow leakage, thereby guaranteeing airflow continuity and pressure stability. During the connection process, the pipe segments are usually finely machined to ensure smooth interfaces and reduce airflow resistance. It is also equipped with sealing gaskets or sealing rings to cope with thermal expansion and contraction and minor deformation, extending the service life of the system. In order to ensure smooth airflow and system stability, elastic seals or sealing rings are also set at the connection points to improve the sealing effect. At present, most of the air intake pipes of the sealed air intake hood are equipped with flanges at the ends. The connection between two adjacent air intake pipes is completed by bolting the flanges. Therefore, whether disassembling or installing, the air intake pipes to be installed need to be supported by the support frame. The construction and dismantling of the support frame requires additional time and manpower. Especially in places with limited space or complex structure, the arrangement and adjustment of the support frame becomes more difficult. In addition, the use of the support frame may affect the construction efficiency and increase the difficulty of on-site management. Utility Model Content

[0003] The purpose of this utility model is to provide a segmented paper machine drying section sealed air hood connection structure, which allows the opposite ends of two adjacent square-mouth air hood cylinder sections to be slidably connected along the Z-axis through a groove connection structure, and uses a double-column anti-fall connection assembly to support the square-mouth air hood cylinder sections to be connected until the two square-mouth air hood cylinder sections are slidably connected, and then uses bolts to completely tighten them, thereby solving the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a segmented paper machine drying section sealed air hood connection structure, including a square-mouth air hood section, a left end plate and a right end plate integrally formed on the outer walls of the left and right ends of the square-mouth air hood section, and a groove connection structure for connecting the left end plate and the right end plate. The right end plate and the left end plate are provided with internal threaded holes at their corner positions. A bolt is installed in the internal threaded hole of the left end plate. A double-column anti-fall connection assembly is installed at the bottom end of the square-mouth air hood section. The double-column anti-fall connection assembly is used to connect two adjacent square-mouth air hood sections.

[0005] Preferably, the square-mouth air hood section, the right end plate, and the left end plate are all made of aluminum alloy components, and triangular grooves are provided on the edge lines of the front and rear outer walls of the square-mouth air hood section.

[0006] Preferably, the groove connection structure includes a hollow steel disc fixed to the outer wall of one side of the left end plate and a lip plate integrally formed at the front and rear sides of the right end plate.

[0007] Preferably, ribs are provided at both the front and rear positions of the hollow steel disc, and a Z-direction connecting groove is provided between the lip plate and the square mouth air hood section for interference sliding insertion of the ribs.

[0008] Preferably, the double-column anti-fall connection assembly includes two support feet fixed to one side of the bottom end of the square-mouth air cover section and two externally threaded protrusions fixed to the other side of the bottom end of the square-mouth air cover section.

[0009] Preferably, the support foot has a through hole for an externally threaded protrusion to pass through, and a nut is installed at one end of the surface of the externally threaded protrusion.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: This segmented paper machine drying section sealed air hood connection structure, through the coordinated structure of square-mouth air hood cylinder sections, right end plate, left end plate, groove connection structure, and double-column anti-fall connection assembly, allows the opposite ends of two adjacent square-mouth air hood cylinder sections to be slidably connected along the Z-axis via the groove connection structure. The double-column anti-fall connection assembly self-supports the square-mouth air hood cylinder sections to be connected until the two sections are slidably connected, after which bolts are used for final tightening. The groove connection structure provides a convenient and reliable sliding docking method, enabling the two cylinder sections to achieve stable and precise docking in the Z-axis direction, compared to traditional rigid connections. This sliding connection effectively buffers minor deviations and errors during installation, reducing the difficulty of alignment during docking and thus improving the efficiency and precision of the overall assembly. Secondly, the double-column anti-fall connection assembly supports the cylinder sections to be connected during docking, further enhancing the safety and stability of the entire connection process. This design ensures that the two cylinder sections will not shift or fall due to gravity or external forces before the bolts are fully tightened, greatly reducing potential safety risks during construction. Furthermore, the double-column structure provides stable support points, maintaining the correct position of the cylinder sections during docking and preventing misalignment or falling due to improper human operation or uncertainties caused by changes in the site environment. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ;

[0012] Figure 2 This is a top view of the structure of this utility model;

[0013] Figure 3 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ;

[0014] Figure 4 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 3 ;

[0015] Figure 5 This is a three-dimensional structural diagram showing the connection state of the three square-mouthed air hood cylinder sections of this utility model. Figure 1 ;

[0016] Figure 6 This is a three-dimensional cross-sectional structural diagram of the three square-mouthed air hood cylinder sections of this utility model in their connected state.

[0017] Figure 7 This is a three-dimensional structural diagram showing the connection state of the three square-mouthed air hood cylinder sections of this utility model. Figure 2 .

[0018] In the diagram: 1. Square-mouth air hood cylinder section; 2. Right end plate; 3. Left end plate; 4. Lip platform; 401. Z-direction connecting groove; 5. Hollow steel disc; 501. Rib; 6. Bolt; 7. Double-column anti-fall connection assembly; 701. Support foot; 702. Through hole; 703. External threaded protrusion; 704. Nut. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0020] Please see Figure 1-7 An embodiment of this utility model provides a segmented paper machine drying section air hood connection structure, including a square-mouth air hood section 1, a left end plate 3 and a right end plate 2 integrally formed on the outer walls of the left and right ends of the square-mouth air hood section 1, and a groove connection structure for connecting the left end plate 3 and the right end plate 2. The right end plate 2 and the left end plate 3 are provided with internal threaded holes at their corner positions. A bolt 6 is installed in the internal threaded hole of the left end plate 3. A double-column anti-fall connection assembly 7 is installed at the bottom end of the square-mouth air hood section 1. The double-column anti-fall connection assembly 7 is used to connect two adjacent square-mouth air hood sections 1.

[0021] The square-mouth air hood cylinder section 1, right end plate 2, and left end plate 3 are all made of aluminum alloy. The right end plate 2 and left end plate 3 are made of aluminum alloy, which has good corrosion resistance and mechanical strength and can be used for a long time in harsh environments. Triangular grooves are provided on the edge lines of the front and rear outer walls of the square-mouth air hood cylinder section 1. The groove connection structure includes a hollow steel disc 5 fixed on one side of the outer wall of the left end plate 3 and a lip plate 4 integrally formed on the front and rear side positions of the right end plate 2.

[0022] Ribs 501 are provided at both the front and rear positions of the hollow steel disc 5. A Z-direction connecting groove 401 is provided between the lip plate 4 and the square mouth air hood cylinder section 1 for the ribs 501 to slide into with interference fit.

[0023] When the two opposite ends are connected by the groove connection structure, the hollow steel disc 5 on the outer wall of the left end plate 3 is slidably inserted into the lip plate 4 on the outer wall of the right end plate 2 through the rib 501. At this time, the rib 501 and the Z-direction connecting groove 401 slide and cooperate until the lower surfaces of the two square-mouth air cover cylinder sections 1 overlap each other, so that the two square-mouth air cover cylinder sections 1 are tightly connected, reducing the gap caused by deviation.

[0024] The double-column anti-fall connection assembly 7 includes two feet 701 fixed on one side of the bottom end of the square-mouth air cover section 1 and two external threaded protrusions 703 fixed on the other side of the bottom end of the square-mouth air cover section 1. The feet 701 are provided with through holes 702 for the external threaded protrusions 703 to pass through. A nut 704 is installed on one end of the surface of the external threaded protrusions 703.

[0025] After the two square-mouth air cover cylinder sections 1 are initially connected through the groove connection structure, the external threaded protrusion 703 at the bottom of one of the square-mouth air cover cylinder sections 1 is inserted into the through hole 702 of the other support foot 701. Finally, the external threaded protrusion 703 and the support foot 701 are locked with a nut 704. The double-column anti-fall connection assembly 7 prevents accidental falls during connection or disassembly, greatly improving the safety level of the construction site. The double-column design enhances the stability of the structure, distributes the load, and reduces the risk of single-point stress.

[0026] In this embodiment, the operator first performs preliminary preparation work on the two square-mouth air hood sections 1 to be connected, including checking whether the end faces are flat, whether the ports are clean, and whether the right end plate 2 and left end plate 3 are intact. The operator vertically aligns the corresponding ports of the two square-mouth air hood sections 1 and gradually aligns the slotted connection structure into place. The Z-axis sliding characteristic of the slotted connection structure is used to achieve precise alignment of the two square-mouth air hood sections 1. After the two square-mouth air hood sections 1 complete the Z-axis sliding connection, the double-column anti-fall connection assembly 7 actively supports one square-mouth air hood section 1, preventing it from falling or shifting due to gravity or deviation. After confirming that the two square-mouth air hood sections 1 are aligned... After the grooved connection structure is aligned and the position basically meets the requirements, the staff needs to insert the preset bolts 6 one by one into the internal threaded holes at the corners of the right end plate 2 and the left end plate 3. The bolts 6 pass through the corresponding internal threaded holes of the right end plate 2 and the left end plate 3 to ensure that the bolts 6 and the internal threaded holes fit tightly and correctly. During the bolt tightening process, the supporting role of the double-column anti-fall connection assembly 7 is still present to ensure that the two square-mouth air cover cylinder sections 1 will not shift during the tightening process. After the tightening is completed, the staff checks the tightness of all bolts 6 again to confirm that the bolts 6 have reached the predetermined tightening torque to ensure the firmness of the connection. Finally, the two square-mouth air cover cylinder sections 1 are further locked using the double-column anti-fall connection assembly 7.

Claims

1. A segmented paper machine drying section sealed air hood connection structure, characterized in that: The device includes a square-mouth air hood cylinder section (1), a left end plate (3) and a right end plate (2) integrally formed on the outer walls of the left and right ends of the square-mouth air hood cylinder section (1), and a groove connection structure for connecting the left end plate (3) and the right end plate (2). The right end plate (2) and the left end plate (3) are provided with internal threaded holes at their corners. A bolt (6) is installed in the internal threaded hole of the left end plate (3). A double-column anti-fall connection assembly (7) is installed at the bottom end of the square-mouth air hood cylinder section (1). The double-column anti-fall connection assembly (7) is used to connect two adjacent square-mouth air hood cylinder sections (1).

2. The segmented paper machine drying section sealed air hood connection structure according to claim 1, characterized in that: The square-mouth air hood cylinder section (1), right end plate (2), and left end plate (3) are all made of aluminum alloy. Triangular grooves are provided on the edge lines of the front and rear outer walls of the square-mouth air hood cylinder section (1).

3. The segmented paper machine drying section sealed air hood connection structure according to claim 1, characterized in that: The groove connection structure includes a hollow steel disc (5) fixed on the outer wall of one side of the left end plate (3) and a lip plate (4) integrally formed on the front and rear sides of the right end plate (2).

4. The segmented paper machine drying section sealed air hood connection structure according to claim 3, characterized in that: The hollow steel disc (5) is provided with ribs (501) at both the front and rear positions, and a Z-direction connecting groove (401) is provided between the lip plate (4) and the square mouth air hood cylinder section (1) for the ribs (501) to slide into with interference fit.

5. The segmented paper machine drying section sealed air hood connection structure according to claim 1, characterized in that: The double-column anti-fall connection assembly (7) includes two feet (701) fixed on one side of the bottom end of the square-mouth air cover section (1) and two externally threaded protrusions (703) fixed on the other side of the bottom end of the square-mouth air cover section (1).

6. The segmented paper machine drying section sealed air hood connection structure according to claim 5, characterized in that: The support foot (701) has a through hole (702) for the external threaded protrusion (703) to pass through, and a nut (704) is installed at one end of the surface of the external threaded protrusion (703).

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