Connecting device for smoke tube and centrifugal fan

Abstract

The utility model discloses a connecting device for a smoke pipe and a centrifugal fan. The connecting device comprises a connecting pipe and a rubber expansion joint, a pair of rubber expansion joints is arranged, and the two rubber expansion joints are detachably connected to the two ends of the connecting pipe respectively; the two rubber expansion joints are connected with the connecting pipe to form a whole connecting device, one end of the whole connecting device is connected with a smoke outlet of the centrifugal fan, and the other end of the whole connecting device is connected with the smoke pipe. Compared with the prior art, the rubber expansion joint has the advantages that the rubber expansion joint can absorb and isolate vibration caused by a fan, so that the stability of the whole system is protected, and meanwhile, the noise level is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to centrifugal fan technical field, specifically point to a kind of connecting device for smoke pipe and centrifugal fan. BACKGROUND

[0002] In industrial production and heating ventilation air conditioning system, centrifugal fan is often used to transport air or exhaust gas. In order to realize effective gas transmission, centrifugal fan is usually connected with smoke pipe (air duct).

[0003] However, the traditional connection method such as direct welding or using simple flange connection may cause poor sealing due to material aging, vibration and other reasons after long-term use, and then cause gas leakage, for example, the vibration generated when the fan is running can be transmitted to the whole pipeline system through hard connection, which may cause structural damage and even noise pollution; Once there is a problem, maintenance work is difficult, especially in narrow space operation is more difficult;

[0004] Therefore, a connecting device for smoke pipe and centrifugal fan with convenient maintenance and shock absorption effect is needed. UTILITY MODEL CONTENT

[0005] The utility model solves the technical problem that long-term use is easy to be damaged due to vibration and other reasons, and is not easy to maintain, and provides a connecting device for smoke pipe and centrifugal fan with convenient maintenance and shock absorption effect.

[0006] To solve the above technical problems, the utility model provides a connecting device for smoke pipe and centrifugal fan, which comprises a connecting pipe and a rubber expansion joint.

[0007] The rubber expansion joint is provided with a pair of rubber expansion joints, which are respectively detachably connected to the two ends of the connecting pipe.

[0008] The two rubber expansion joints and the connecting pipe form a connecting device whole after connection, one end of the connecting device whole is connected with the smoke outlet of the centrifugal fan, and the other end is connected with the smoke pipe.

[0009] As an improvement, the connecting pipe is provided with a fixed flange plate at each end, and the two rubber expansion joints are provided with a first flange plate and a second flange plate at each end.

[0010] The first flange plate is arranged close to the fixed flange plate, a plurality of fixed bolts pass through a plurality of groups of flange holes in the first flange plate and the second flange plate, and the first flange plate and the second flange plate are connected and limited by the cooperation of the fixed nut, and the second flange plate of the two rubber expansion joints is connected with the centrifugal fan or the smoke pipe.

[0011] As an improvement, a sealing washer is arranged between the two rubber expansion joints and the connecting pipe to improve the shock absorption and sealing effect.

[0012] As an improvement, the second flange is fixedly provided with a sealing rubber ring, improving the tightness of the connection.

[0013] As an improvement, the connecting pipe is a stainless steel bellows pipe with expansion capability, allowing the adaptation of different diameter smoke pipes and fan inlets and outlets.

[0014] The utility model has the advantages compared with the prior art in that:

[0015] 1. By setting up the rubber expansion joint, and increasing the first flange and the second flange at both ends, cooperating with the sealing washer and the sealing rubber ring, it can ensure that even after a long time of operation, it can maintain a high sealing standard, preventing gas leakage;

[0016] 2. The rubber expansion joint can absorb and isolate the vibration caused by the fan, thereby protecting the stability of the entire system, while reducing the noise level

[0017] 3. The connecting pipe is designed with a stainless steel bellows pipe with expansion capability, allowing the adaptation of different diameter smoke pipes and fan inlets and outlets, improving the compatibility between equipment. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 is a perspective view of a connecting device for a smoke pipe and a centrifugal fan.

[0019] Fig. 2 is a connecting pipe schematic diagram of a connecting device for a smoke pipe and a centrifugal fan.

[0020] Fig. 3 is a rubber expansion joint schematic diagram of a connecting device for a smoke pipe and a centrifugal fan.

[0021] As shown in the figure: 1, connecting pipe; 2, rubber expansion joint; 3, fixed flange; 4, first flange; 5, second flange; 6, fixing bolt; 7, sealing washer; 8, sealing rubber ring. DETAILED DESCRIPTION

[0022] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "transverse", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or positional relationship shown based on the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can be explicitly or implicitly included one or more features. In the description of the utility model, unless otherwise specified, the meaning of "multiple" is two or more. In addition, the term "includes" and any variation thereof is intended to cover non-exclusive inclusion.

[0023] The utility model will be further described in detail below in combination with the drawings.

[0024] A connecting device for a smoke pipe and a centrifugal fan, in combination with the drawings Figs. 1-3 As shown, it comprises a connecting pipe 1 and a rubber expansion joint 2; the rubber expansion joint 2 is provided in pairs, and the two rubber expansion joints 2 are respectively detachably connected at the two ends of the connecting pipe 1; the connecting pipe 1 is respectively provided with a fixed flange plate 3 at the two ends, and the two rubber expansion joints 2 are respectively provided with a first flange plate 4 and a second flange plate 5 at the two ends; the first flange plate 4 is arranged in close contact with the fixed flange plate 3, a plurality of fixed bolts 6 respectively pass through a plurality of groups of flange holes on the first flange plate 4 and the second flange plate 5, and the first flange plate 4 and the second flange plate 5 are limitingly connected under the cooperation of fixed nuts; the second flange plate 5 of the two rubber expansion joints 2 is connected with the centrifugal fan or the smoke pipe, and a sealing rubber ring 8 is fixedly arranged on the second flange plate 5 to improve the tightness of the connection;

[0025] The sealing washer 7 is arranged between the two rubber expansion joints 2 and the connecting pipe 1, and is convenient to replace, thereby improving the damping and sealing effect;

[0026] The two rubber expansion joints 2 and the connecting pipe 1 are connected to form a connecting device whole, one end of the connecting device whole is connected with the smoke outlet of the centrifugal fan, and the other end is connected with the smoke pipe; the connecting pipe 1 is a stainless steel corrugated pipe with expansion capability, which allows the smoke pipe and the fan inlet and outlet of different diameters to be adapted.

[0027] The utility model discloses a kind of connecting devices for centrifugal fan and smoke pipe, comprising connecting pipe 1, rubber expansion joint 2, first flange plate 4, second flange plate 5 and sealing washer 7, wherein connecting pipe 1 is connected with rubber expansion joint 2, and rubber expansion joint 2 is connected with first flange plate 4 and second flange plate 5, and sealing washer 7 is inserted between first flange plate 4 and second flange plate 5.

[0028] The end of the assembled connecting device is connected with the smoke outlet of the centrifugal fan, and the corresponding fixing bolt 6 and nut are used for fastening, and the other end is connected with the smoke pipe and fastened, the rubber expansion joint 2 can absorb and isolate the vibration caused by the fan, so as to protect the stability of the whole system, and reduce the noise level.

[0029] The above describes the utility model and its implementation, which is not limited, and the drawings shown are only one of the embodiments of the utility model, and the actual structure is not limited. In general, if a person skilled in the art is inspired, without departing from the purpose of the utility model, without creative design, similar structure and examples of the technical solution, which should belong to the protection scope of the utility model.

Claims

1. A connection device for a smoke duct and a centrifugal fan, characterized by: The connecting pipe (1) and the rubber expansion joint (2) are connected. The rubber expansion joint (2) is provided with a pair of rubber expansion joints (2), which are respectively detachably connected to the two ends of the connecting pipe (1). The two rubber expansion joints (2) and the connecting pipe (1) are connected to form a connecting device as a whole, one end of which is connected to the smoke outlet of the centrifugal fan, and the other end is connected to the smoke pipe.

2. A connection device for a flue with a centrifugal fan according to claim 1, characterized in that: The connecting pipe (1) is provided with a fixed flange (3) at both ends, and the two rubber expansion joints (2) are respectively provided with a first flange (4) and a second flange (5) at both ends. The first flange (4) is arranged close to the fixed flange (3), a plurality of fixed bolts (6) pass through a plurality of groups of flange holes on the first flange (4) and the second flange (5), and the first flange (4) and the second flange (5) are connected by the cooperation of the fixed nuts, and the second flange (5) of the two rubber expansion joints (2) is connected to the centrifugal fan or the smoke pipe.

3. A connection device for a flue with a centrifugal fan according to claim 2, characterized in that: It also includes a sealing washer (7) between the two rubber expansion joints (2) and the connecting pipe (1).

4. A connection device for a flue with a centrifugal fan according to claim 2, characterized in that: The second flange (5) is fixedly provided with a sealing rubber ring (8), and after the second flange (5) is connected to the centrifugal fan or the smoke pipe, the sealing rubber ring (8) is tightly attached to the inner wall of the centrifugal fan or the smoke pipe.

5. A connection device for a flue with a centrifugal fan according to claim 1, characterized in that: The connecting pipe (1) is a stainless steel bellows with stretchability.

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