Pressure measuring interface assembly of induced draft fan and induced draft fan applying pressure measuring interface assembly

Abstract

The pressure measuring interface assembly of the induced draft fan is arranged on a volute, a pressure measuring through hole communicated with an inner cavity of the volute and the outside is formed in the pressure measuring interface assembly, and the pressure measuring through hole is communicated with the inner cavity of the volute and the outside. The pressure measuring connector assembly comprises an air pipe installation section located on the outer side of the volute and an airflow leading-in section located in an inner cavity of the volute, the airflow leading-in section comprises a curved boss arranged on the periphery of the pressure measuring through hole, an airflow leading-in opening is formed between the head end and the tail end of the curved boss, and airflow in the inner cavity of the volute penetrates through the airflow leading-in opening to enter the pressure measuring through hole. The airflow lead-in port is more favorable for leading airflow in the inner cavity of the volute into the pressure measuring through hole, so that the range of measured static pressure data is larger than that of static pressure data measured by a pressure measuring interface in the prior art, and the development difficulty is reduced.

Description

Technical Field

[0001] The utility model relates to a pressure measuring interface assembly of an induced draft fan and an induced draft fan to which the pressure measuring interface assembly is applied. Background Art

[0002] The current induced draft fan includes a volute and a wind wheel installed in the inner cavity of the volute. A pressure measuring interface assembly for testing the air pressure in the inner cavity of the volute is provided on the volute. The pressure measuring interface assembly includes an air pipe installation pipe located outside the volute. A pressure measuring through hole communicating the inside and outside of the volute is provided in the air pipe installation pipe. Since the distance from the inner wall of the volute to the wind wheel is small and the available space for development and design is less, usually no design is made around the periphery of the pressure measuring through hole opening located inside the volute. However, the static pressure data measured by such a structure are often not accurate enough. Content of the Utility Model

[0003] The utility model provides a pressure measuring interface assembly of an induced draft fan and an induced draft fan to which the pressure measuring interface assembly is applied, so as to solve the problem that the static pressure data measured by the pressure measuring interface assembly in the prior art are not accurate enough.

[0004] The technical solution of the utility model is realized as follows:

[0005] The first object of the utility model is to provide a pressure measuring interface assembly of an induced draft fan. The pressure measuring interface assembly is arranged on the volute. A pressure measuring through hole communicating the inner cavity of the volute with the outside is provided in the pressure measuring interface assembly. The pressure measuring interface assembly includes an air pipe installation section located outside the volute and an air flow guiding section located in the inner cavity of the volute. The air flow guiding section includes a curved convex platform arranged around the pressure measuring through hole. An air flow guiding port is formed between the head and the tail ends of the curved convex platform. The air flow in the inner cavity of the volute passes through the air flow guiding port and enters the pressure measuring through hole.

[0006] The side of the curved convex platform facing the pressure measuring through hole is the inner side, and the inner side wall of the curved convex platform is arc-shaped.

[0007] Chamfers are provided at the top of the head and tail ends of the curved convex platform.

[0008] The pressure measuring interface assembly and the volute are integrally formed.

[0009] The air pipe installation section is of a cylindrical structure, and a reinforcing rib is provided between the air pipe installation section and the volute.

[0010] The second object of the utility model is to provide an induced draft fan, including a pressure measuring interface assembly, and the pressure measuring interface assembly is the pressure measuring interface assembly described above.

[0011] Compared with the prior art, the utility model has the following advantages:

[0012] 1. The pressure measurement interface assembly of the induced draft fan is arranged on the volute. A pressure measurement through hole communicating the inner cavity of the volute with the outside is provided in the pressure measurement interface assembly. The pressure measurement interface assembly includes an air pipe installation section located outside the volute and an air flow introduction section located in the inner cavity of the volute. The air flow introduction section includes a curved convex platform arranged around the pressure measurement through hole. An air flow inlet is formed between the head and the tail ends of the curved convex platform. The air flow in the inner cavity of the volute passes through the air flow inlet and enters the pressure measurement through hole. The air flow inlet is more conducive to introducing the air flow in the inner cavity of the volute into the pressure measurement through hole, so that the measured static pressure data has a larger range than the static pressure data measured by the existing pressure measurement interface, thereby reducing the development difficulty.

[0013] 2. Other advantages of the present utility model are described in detail in the embodiment part. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 FIG. 1 is a schematic structural diagram of the pressure measurement interface assembly of the induced draft fan provided in Embodiment 1 of the present utility model;

[0015] Figure 2 is Figure 1 an enlarged view of part A in FIG. 1;

[0016] Figure 3 FIG. 2 is a schematic structural diagram of the pressure measurement interface assembly of the induced draft fan from another angle;

[0017] Figure 4 is Figure 3 an enlarged view of part B in FIG. 2;

[0018] Figure 5 FIG. 3 is a front view of the pressure measurement interface assembly of the induced draft fan;

[0019] Figure 6 is Figure 5 a sectional view taken along line C-C in FIG. 3;

[0020] Figure 7 is Figure 6 an enlarged view of part D in FIG. 4. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0022] Embodiment 1:

[0023] As shown in Figures 1 to 7As shown in the figure, the present embodiment provides a pressure measuring interface assembly for a induced draft fan, which is arranged on the volute 2. A pressure measuring through hole 11 communicating the inner cavity 21 of the volute 2 with the outside is provided in the pressure measuring interface assembly. The pressure measuring interface assembly includes an air pipe installation section 12 located outside the volute 2 and an air flow introduction section located in the inner cavity 21 of the volute 2. The air flow introduction section includes a curved convex platform 13 arranged around the pressure measuring through hole 11. An air flow inlet 14 is formed between the head and the tail ends of the curved convex platform 13. The air flow in the inner cavity 21 of the volute 2 passes through the air flow inlet 14 and enters the pressure measuring through hole 11.

[0024] For the pressure measuring interface assembly of the induced draft fan, the air flow inlet 14 is more conducive to guiding the air flow in the inner cavity 21 of the volute 2 into the pressure measuring through hole 11, making the measured static pressure data more accurate, and the design of the air flow introduction section is not restricted by space. In addition, the size and orientation of the air flow inlet 14 can be changed according to the position of the pressure measuring interface assembly and the distance between the inner wall of the volute 2 and the impeller, so as to detect different static pressure data. The air flow inlet is more conducive to guiding the air flow in the volute inner cavity into the pressure measuring through hole 11, making the range of the static pressure data measured by the pressure measuring interface larger than that measured by the existing technology pressure measuring interface, thereby reducing the development difficulty.

[0025] For the above-mentioned curved convex platform 13, the side facing the pressure measuring through hole 11 is the inner side, and the inner side wall 131 of the curved convex platform 13 is arc-shaped. The arc-shaped inner side wall 131 has a better flow guiding effect.

[0026] As an optional item, the cross-section of the above-mentioned inner side wall 131 is semi-circular arc-shaped.

[0027] For the above-mentioned curved convex platform 13, chamfers are provided at the top of the head and tail ends, which can reduce the disturbance of the pressure measuring interface to the air flow inside the volute and reduce the eddy current around the pressure measuring interface.

[0028] The above-mentioned pressure measuring interface assembly 1 and the volute 2 are integrally formed. It is convenient for processing and has lower cost.

[0029] The above-mentioned air pipe installation section 12 is of a cylindrical structure, and a reinforcing rib 22 is provided between the air pipe installation section 12 and the volute 2.

[0030] Embodiment Two:

[0031] The second object of the present utility model is to provide an induced draft fan, which includes a pressure measuring interface assembly 100, and the pressure measuring interface assembly 100 is the pressure measuring interface assembly described in Embodiment One.

[0032] Through the improvement of the structure of the pressure measuring interface assembly 100, the pressure measurement of the pressure measuring interface assembly 100 is more accurate, and the design of the air flow introduction section of the pressure measuring interface assembly 100 is better.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A pressure measuring interface assembly of an induced draft fan is arranged on a volute (2). A pressure measuring through hole (11) communicating the inner cavity (21) of the volute (2) with the outside is arranged in the pressure measuring interface assembly. It is characterized in that: The pressure measurement interface assembly includes a trachea installation section (12) located outside the volute (2) and an air flow introduction section located in the inner cavity (21) of the volute (2). The air flow introduction section includes a curved boss (13) provided around the pressure measurement through hole (11). An air flow inlet (14) is formed between the head and the tail ends of the curved boss (13). The air flow in the inner cavity (21) of the volute (2) passes through the air flow inlet (14) and enters the pressure measurement through hole (11).

2. The pressure measuring interface assembly of a induced draft fan according to claim 1, characterized in that: The side of the curved boss (13) facing the pressure measurement through hole (11) is the inner side, and the inner side wall (131) of the curved boss (13) is arc-shaped.

3. The pressure measuring interface assembly of a induced draft fan according to claim 1 or 2, characterized in that: Chamfers (132) are provided at the tops of the head and the tail ends of the curved boss (13).

4. The pressure measuring interface assembly of a induced draft fan according to claim 3, wherein: The pressure measurement interface assembly (1) and the volute (2) are integrally formed.

5. The pressure measuring interface assembly of a induced draft fan according to claim 4, characterized in that: The trachea installation section (12) is of a cylindrical structure, and a reinforcing rib (22) is provided between the trachea installation section (12) and the volute (2).

6. A induced draft fan, comprising a pressure measuring interface assembly (100), characterized in that: The pressure measurement interface assembly (100) is the pressure measurement interface assembly according to any one of claims 1 to 5.

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