Glass fiber reinforced plastic shell for centrifugal fan

Abstract

The utility model relates to the technical field of fan shells, and discloses a glass fiber reinforced plastic shell for a centrifugal fan, which comprises a first half shell and a second half shell which are mutually symmetrical, the outer wall of the first half shell is fixedly connected with a plurality of first half screws, and the outer wall of the second half shell is fixedly connected with a plurality of second half screws. The first half screw corresponds to the second half screw, the first half screw and the second half screw are spliced into a threaded rod, the outer wall of the threaded rod is in threaded connection with a threaded sleeve, a connecting insertion plate is fixedly connected to the side, close to the second half shell, of the first half shell, and a connecting insertion groove matched with the connecting insertion plate is formed in one side of the second half shell; the threaded sleeve is screwed on the outer wall of the threaded rod through the threads, so that the first half screw rod and the second half screw rod are limited, when the fan shell is assembled and disassembled, the threaded sleeve is screwed out of the threaded rod, a worker does not need to disassemble a large number of bolts, and the fan shell is convenient to disassemble and assemble.

Description

Technical Field

[0001] The utility model relates to the technical field of fan casings, in particular to a glass fiber reinforced plastic casing for a centrifugal fan. Background Art

[0002] A fan is a type of driven fluid machine that relies on input mechanical energy to increase gas pressure and transport the gas. The term "fan" is often used as a shorthand for gas compression and gas transport machinery, and typically includes ventilators, blowers, and wind turbines. Fans are widely used in factories, mines, tunnels, cooling towers, vehicles, ships, and buildings for ventilation, dust removal, and cooling, as well as for ventilation and draft control in boilers and industrial furnaces. Centrifugal fans are a common type of fan, and their casing is one of their key components. The fan casing is the outer shell that protects the fan's internal components and offers excellent durability and sealing properties.

[0003] For example, patent document CN217055699U discloses a spliced lightweight centrifugal fan housing, comprising a support base, a limiting jacket fixedly connected to the middle portion of the upper portion of the support base, an angular sleeve slide rail movably connected to the inner portion of the upper portion of the limiting jacket, a fastening bolt installed on the outer portion of one side of the limiting jacket, an external clamp fixedly connected to the upper portion of the angular sleeve slide rail, and a front protective frame movably connected to the front portion of the external clamp. The spliced lightweight centrifugal fan housing is configured such that the angle of the upper air outlet device connected to the external clamp is adjusted during use by movably connecting the limiting jacket to the outer portion of the lower portion of the angular sleeve slide rail, adjusting the relative position between the angular sleeve slide rail and the limiting jacket as needed, and rotating the fastening bolt to limit the position of the angular sleeve slide rail. This facilitates adjustment of the air outlet angle. However, this prior art still has many shortcomings, such as the need to install multiple screws when assembling the fan housing, which is cumbersome to operate, and inconvenient to disassemble when the fan housing needs to be inspected and cleaned. Utility Model Content

[0004] The purpose of the utility model is to provide a glass fiber reinforced plastic casing for a centrifugal fan to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a fiberglass reinforced plastic shell for a centrifugal fan, comprising a first half shell and a second half shell that are symmetrical to each other, the outer wall of the first half shell being fixedly connected to a plurality of first half screws, the outer wall of the second half shell being fixedly connected to a plurality of second half screws, the first half screws corresponding to the second half screws, the first half screws and the second half screws being spliced into a threaded rod, the outer wall of the threaded rod being connected to a threaded sleeve through a thread, a connecting plug plate being fixedly connected to a side of the first half shell close to the second half shell, and a connecting slot adapted to the connecting plug plate being opened on one side of the second half shell.

[0006] As a further improvement to the above solution, the bottom of the outer wall of the first half screw and the second half screw are fixedly connected to a fixed half ring, a limiting groove is opened on the top of the fixed half ring, and a movable ring is slidingly provided on the outer wall of the threaded sleeve, and the bottom of the movable ring is fixedly connected to two limiting plates adapted to the limiting groove.

[0007] As a further improvement to the above solution, sliding grooves are provided at both ends of the outer wall of the threaded sleeve, and a slider is slidably connected to the inner wall of the sliding groove, and the slider is fixedly connected to the movable ring.

[0008] As a further improvement to the above solution, an extrusion spring is fixedly connected between the slider and the slide groove, and two pull plates are fixedly connected to the circumferential outer wall of the movable ring.

[0009] As a further improvement to the above solution, a sealing gasket is fixedly provided on an inner wall of one side of the connecting slot, and the sealing gasket fits the connecting slot.

[0010] As a further improvement to the above solution, the tops of the first half shell and the second half shell are spliced to form an air outlet, an air inlet is opened on one side of the first half shell, and an installation opening is opened on one side of the second half shell.

[0011] As a further improvement to the above solution, an inlet bell is fixedly connected to the inner wall of the air inlet, and the first half shell, the second half shell and the inlet bell are all made of fiberglass.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The utility model is that the first half screw corresponds to the second half screw, and the first half screw and the second half screw are spliced into a threaded rod. The outer wall of the threaded rod is connected with a threaded sleeve through a thread. When assembling the first half shell and the second half shell, the connecting plate is first inserted into the connecting slot. At this time, the first half screw corresponds to the second half screw and is spliced into a threaded rod. The staff screws the threaded sleeve onto the outer wall of the threaded rod through the thread, thereby limiting the first half screw and the second half screw, and then limiting the first half shell and the second half shell to complete the assembly of the fan casing. When disassembling, the threaded sleeve can be unscrewed from the threaded rod, and the staff does not need to remove a large number of bolts, which facilitates the disassembly and assembly of the fan casing.

[0014] The utility model provides a limiting groove on the top of the fixed half ring, and a movable ring is slidably provided on the outer wall of the threaded sleeve. The bottom of the movable ring is fixedly connected to two limiting plates adapted to the limiting groove. When the threaded sleeve is connected to the threaded rod through threads, the movable ring is driven to move downward continuously. At this time, the movable ring is pulled to separate the movable ring from the fixed half ring. When the threaded sleeve is installed, the movable ring is loosened, and the limiting plate is pushed into the limiting groove under the elastic force of the extrusion spring. The threaded sleeve is limited by the slider and the sliding groove to prevent the fan from vibrating during operation and causing the threaded sleeve to loosen, thereby causing the first half shell to separate from the second half shell. When disassembling, the threaded sleeve can be taken out after pulling the movable ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model from a first viewing angle;

[0017] Figure 2 This is a schematic diagram of the three-dimensional structure of the utility model from a second viewing angle;

[0018] Figure 3 This is a schematic diagram of the exploded three-dimensional structure of the first half shell and the second half shell in the present invention;

[0019] Figure 4 Schematic diagram of the three-dimensional structure of the first half screw and the second half screw in the present invention;

[0020] Figure 5 It is a schematic diagram of the exploded three-dimensional structure of the slider and the slide groove in the utility model.

[0021] In the figure: 1. First half shell; 2. Second half shell; 3. Air inlet; 4. Air outlet; 5. Inlet bell; 6. Mounting port; 7. Connecting plug plate; 8. Connecting slot; 9. Sealing gasket; 10. First half screw; 11. Second half screw; 12. Fixed half ring; 13. Limiting groove; 14. Threaded sleeve; 15. Movable ring; 16. Limiting plate; 17. Pull plate; 18. Slider; 19. Extrusion spring; 20. Slide groove; 21. Threaded rod. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example 1

[0023] A glass fiber reinforced plastic shell for a centrifugal fan, such as Figures 1 to 4 As shown, it includes a first half shell 1 and a second half shell 2 that are symmetrical to each other. The outer wall of the first half shell 1 is connected to a plurality of first half screws 10 by bolts, and the outer wall of the second half shell 2 is connected to a plurality of second half screws 11 by bolts. The first half screws 10 correspond to the second half screws 11. The first half screws 10 and the second half screws 11 are spliced into a threaded rod 21. The outer wall of the threaded rod 21 is connected to a threaded sleeve 14 by thread. The side of the first half shell 1 close to the second half shell 2 is connected to a connecting plug plate 7 by bolts, and a connecting slot 8 adapted to the connecting plug plate 7 is opened on one side of the second half shell 2.

[0024] like Figure 3 As shown, a sealing gasket 9 is fixedly provided on the inner wall of one side of the connecting slot 8, and the sealing gasket 9 fits the connecting slot 8. Through the sealing gasket 9, after installation, the gap between the connecting plate 7 and the connecting slot 8 can be sealed to ensure the sealing of the fan casing.

[0025] like Figure 1 and Figure 2 As shown, the tops of the first half shell 1 and the second half shell 2 are spliced together to form an air outlet 4, an air inlet 3 is provided on one side of the first half shell 1, and an installation opening 6 is provided on one side of the second half shell 2. The drive motor and impeller of the fan are installed through the installation opening 6; the inner wall of the air inlet 3 is connected with an inlet bell 5 by bolts, and the first half shell 1, the second half shell 2 and the inlet bell 5 are all made of fiberglass. The inlet bell 5 ensures that air can enter the impeller of the fan with minimal loss, uniformly distributed pressure and speed. The fiberglass material can increase the overall corrosion resistance of the fan casing.

[0026] In Example 1, when assembling the first half shell 1 and the second half shell 2, first insert the connecting plug plate 7 into the connecting slot 8 so that the connecting plug plate 7 is in full contact with the sealing gasket 9. The gap between the connecting slot 7 and the connecting plug plate 8 is sealed by the sealing gasket 9. Since the shape of the connecting slot 8 and the connecting plug plate 7 is the same as that of the first half shell 1 and the second half shell 2, the first half screw 10 and the second half screw 11 correspond to each other and are spliced into a threaded rod 21. The staff screws the threaded sleeve 14 onto the outer wall of the threaded rod 21 through threads, thereby limiting the first half screw 10 and the second half screw 11, and then limiting the first half shell 1 and the second half shell 2, completing the assembly of the fan casing. When disassembling, the threaded sleeve 14 can be unscrewed from the threaded rod 21. There is no need for the staff to remove a large number of bolts, which facilitates the disassembly and assembly of the fan casing. Example 2

[0027] Example 2 is based on Example 1, as Figure 4 and Figure 5 As shown, the bottom of the outer wall of the first half screw rod 10 and the second half screw rod 11 are both connected by bolts with a fixed half ring 12, and a limiting groove 13 is opened on the top of the fixed half ring 12. The outer wall of the threaded sleeve 14 is slidably provided with a movable ring 15, and the bottom of the movable ring 15 is connected by bolts with two limiting plates 16 adapted to the limiting groove 13. The threaded sleeve 14 is limited by the limiting groove 13 and the limiting plates 16; the outer wall of the threaded sleeve 14 is provided with a sliding groove 20, and the inner wall of the sliding groove 20 is slidably connected with a slider 18, and the slider 18 is connected to the movable ring 15 by bolts. The sliding groove 20 and the slider 18 can make the movable ring 15 slide on the threaded sleeve 14, and at the same time, the movable ring 15 and the threaded sleeve 14 can rotate synchronously; an extrusion spring 19 is connected between the slider 18 and the sliding groove 20 by bolts, and the circumferential outer wall of the movable ring 15 is connected by bolts with two pulling plates 17, which are convenient for pulling the movable ring 15.

[0028] In Example 2, when the threaded sleeve 14 is connected to the threaded rod 21 through threads, the movable ring 15 will be driven to move downward continuously. At this time, the movable ring 15 is pulled to separate the movable ring 15 from the fixed half ring 12. When the threaded sleeve 14 is installed, the movable ring 15 is loosened. Under the elastic force of the extrusion spring 19, the limit plate 16 is pushed into the limit groove 13. The threaded sleeve 14 is limited by the slider 18 and the slide groove 20 to prevent the fan from vibrating during operation and causing the threaded sleeve 14 to loosen, thereby causing the first half shell 1 to separate from the second half shell 2. When disassembling, the threaded sleeve 14 can be taken out after pulling the movable ring 15.

[0029] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A glass fiber reinforced plastic housing for a centrifugal fan, comprising a first half housing (1) and a second half housing (2) that are symmetrical to each other, characterized in that: The outer wall of the first half shell (1) is fixedly connected to a plurality of first half screws (10), and the outer wall of the second half shell (2) is fixedly connected to a plurality of second half screws (11), the first half screws (10) and the second half screws (11) correspond to each other, the first half screws (10) and the second half screws (11) are spliced into a threaded rod (21), the outer wall of the threaded rod (21) is connected to a threaded sleeve (14) through a thread, a connecting plug plate (7) is fixedly connected to a side of the first half shell (1) close to the second half shell (2), and a connecting slot (8) adapted to the connecting plug plate (7) is opened on one side of the second half shell (2).

2. The fiberglass reinforced plastic housing for a centrifugal fan according to claim 1, characterized in that: The bottom of the outer wall of each of the first half screw (10) and the second half screw (11) is fixedly connected with a fixed half ring (12), a limiting groove (13) is provided on the top of the fixed half ring (12), and a movable ring (15) is slidably provided on the outer wall of the threaded sleeve (14), and the bottom of the movable ring (15) is fixedly connected with two limiting plates (16) adapted to the limiting groove (13).

3. The glass fiber reinforced plastic housing for a centrifugal fan according to claim 2, characterized in that: Slide grooves (20) are formed at both ends of the outer wall of the threaded sleeve (14), and a slider (18) is slidably connected to the inner wall of the slide groove (20), and the slider (18) is fixedly connected to the movable ring (15).

4. The glass fiber reinforced plastic housing for a centrifugal fan according to claim 3, characterized in that: An extrusion spring (19) is fixedly connected between the slider (18) and the slide groove (20), and two pull plates (17) are fixedly connected to the circumferential outer wall of the movable ring (15).

5. The fiberglass reinforced plastic housing for a centrifugal fan according to claim 1, characterized in that: A sealing gasket (9) is fixedly provided on an inner wall of one side of the connection slot (8), and the sealing gasket (9) fits the connection slot (8).

6. The glass fiber reinforced plastic housing for a centrifugal fan according to claim 1, characterized in that: The tops of the first half shell (1) and the second half shell (2) are spliced together to form an air outlet (4); an air inlet (3) is provided on one side of the first half shell (1); and a mounting opening (6) is provided on one side of the second half shell (2).

7. The glass fiber reinforced plastic housing for a centrifugal fan according to claim 6, characterized in that: An inlet bell (5) is fixedly connected to the inner wall of the air inlet (3); the first half shell (1), the second half shell (2) and the inlet bell (5) are all made of glass fiber reinforced plastic.

Images