WO2020007053A1

WO2020007053A1 - Pressure measurement interface assembly used on volute casing and draught fan using same

Info

Publication number: WO2020007053A1
Application number: PCT/CN2019/076269
Authority: WO
Inventors: 林海奇; 肖佰显; 宋双喜; 陈梅霜
Original assignee: 中山大洋电机股份有限公司
Priority date: 2018-07-06
Filing date: 2019-02-27
Publication date: 2020-01-09
Also published as: CN208634102U

Abstract

A pressure measurement interface assembly used on a volute casing and a draught fan using same. The pressure measurement interface assembly comprises a pressure measurement interface (1) and a mounting metal sheet (2). A pressure measurement channel (10) is formed in the middle of the pressure measurement interface (1). The pressure measurement interface (1) comprises a main body section (11). An air pipe mounting section (12) axially extends out of the top end of the main body section (11). A flange (13) radially extends out of the bottom end of the main body section (11). The mounting metal sheet (2) is sleeved on the main body section (11) and forms a slot (14) with the flange (13). The pressure measurement interface assembly has a simple structure, is low in manufacturing costs, is easy to process, and is convenient to mount.

Description

Pressure measuring interface component used on volute and induced draft fan using same

Technical field:

The utility model relates to a pressure measuring interface component used on a volute and an induced draft fan using the same.

Background technique:

The existing induced draft fan is equipped with a pressure measuring interface assembly 100b on the volute 2b to detect the internal air pressure. The structure is shown in FIG. 1, and the structure of the pressure measuring interface assembly 100b is shown in FIGS. 2 to 3. 1a, intermediate connecting section 2a, barrel section 3a, and flange 4a, a slot 5a is formed between the barrel section 3a and the flange 4a, and the wall surface of the volute 2b is fitted into the slot 5a, so that the pressure measuring interface assembly 100b is fixed A pressure measurement channel 6a is formed in the middle of the pressure measurement interface assembly 100b. This structure has the following disadvantages: 1) complicated structure and troublesome installation; 2) complex processing technology and high processing cost. The current pressure measuring interface is processed by a lathe, and the wall thickness cannot be too thin, resulting in high material costs and processing costs. .

Summary of the invention:

The purpose of the utility model is to provide a pressure-measuring interface component used on a volute and an induced draft fan to solve the technical problems of the complex structure and high production cost of the pressure-measuring interface component in the background art described above.

The purpose of the utility model is achieved through the following technical solutions:

A pressure-measuring interface component used on a volute includes a pressure-measuring interface and a mounting metal sheet. A pressure-measuring channel is formed in the middle of the pressure-measuring interface. The pressure-measuring interface includes a main body section, and an air pipe installation section extends axially at the top of the main body section. A flange is extended radially at the bottom end of the main body section, and a metal sheet is installed on the main body section to form a slot with the flange.

The above-mentioned mounting metal sheet includes a pressing plate, a through hole is formed in the middle of the pressing plate, and barbs are protruded axially on the pressing plate. The barbs surround the through hole layout and protrude toward the top. The pressing plate and the flange form a card slot. The top of the spines rests on the outer surface of the body section.

In the above, a groove or a protrusion is provided on the main body section, and the top of the barbed is embedded in the groove or the top of the barbed is against the step.

There are two barbs described above, and the two barbs are symmetrically arranged around the through hole.

A V-shaped notch is formed in the barb described above, and the outer surface of the main body segment is caught inside the V-notch.

The diameter D1 of the main body section is larger than the diameter D2 of the air pipe installation section, and the main body section and the air pipe installation section form a circular arc transition section.

The above-mentioned pressure measuring interface is formed by punching and drawing from a metal sheet.

The mounting metal sheet described above is stamped and formed from a metal sheet.

An induced draft fan includes a volute, a motor, a wind wheel, and a pressure measurement interface component. A cavity for installing a wind wheel is formed in the volute, and a pressure measurement interface component is installed on the volute. The characteristics are as follows: It is the pressure-measuring interface component used on the volute described above. The wall surface of the volute is embedded in the clamping groove between the pressure plate and the flange, and the pressure-measuring channel is in communication with the cavity.

Compared with the prior art, the utility model has the following effects:

1) The pressure measuring interface assembly of the present utility model includes a pressure measuring interface and a mounting metal sheet. A pressure measuring channel is formed in the middle of the pressure measuring interface. The pressure measuring interface includes a main body section, and an air pipe installation section is axially extended at the top of the main body section. The bottom end of the main body section extends radially from the flange, and a metal sheet is installed on the main body section to form a slot with the flange, which simplifies the structure and does not need to be processed by a lathe, which greatly reduces the processing cost. Easy processing and easy installation.

2) The mounting metal sheet includes a pressure plate, a through hole is formed in the middle of the pressure plate, and barbs are protruded axially on the pressure plate. The barbs surround the through hole layout and protrude toward the top. The pressure plate and the flange form a card slot. The top rests on the outer surface of the main body section, and the structure is simple and easy to install.

3) A V-shaped notch is formed in the middle of the barb, and the outer surface of the main section is caught in the V-shaped notch, which is convenient to install and can effectively position the pressure measurement interface.

4) The pressure measuring interface is stamped and stretched from a metal sheet, and the wall thickness is uniform and can cause a thin wall thickness, which can greatly reduce the material cost and processing cost, and the processing efficiency is high. The mounting metal sheet described above is stamped and formed from a metal sheet, which has low processing cost and low material cost.

5) A groove or a projection is provided in the main body section, and the top of the barbed is embedded in the groove or the top of the barbed is against the step, so that the installation and positioning of the installation metal sheet is more reliable.

Brief description of the drawings:

1 is a schematic perspective view of a structure of a conventional induced draft fan;

FIG. 2 is a perspective view of the load cell interface assembly in FIG. 1; FIG.

FIG. 3 is a structural cross-sectional view of the pressure measurement interface assembly in FIG. 1; FIG.

4 is a perspective view of a pressure measuring interface assembly according to the first embodiment of the present invention;

5 is an exploded view of a pressure measuring interface component according to the first embodiment of the present invention;

6 is a structural cross-sectional view of a pressure measuring interface assembly according to the first embodiment of the present invention;

FIG. 7 is a perspective view of a pressure measuring interface assembly with an improved structure according to the first embodiment of the present invention; FIG.

8 is a perspective view of a draft fan according to a second embodiment of the present invention;

FIG. 9 is a front view of the connection between the volute and the pressure measurement interface assembly according to the second embodiment of the present invention; FIG.

Fig. 10 is a sectional view taken along A-A of Fig. 8;

Fig. 11 is a partially enlarged view of B-B in Fig. 9.

detailed description:

The present invention will be further described in detail through specific embodiments and the accompanying drawings.

Embodiment one:

As shown in FIG. 4 to FIG. 6, the first embodiment is a pressure-measuring interface assembly for a volute, which includes a pressure-measuring interface 1 and a mounting metal sheet 2. A pressure-measuring channel 10 is formed in the middle of the pressure-measuring interface 1. The pressure joint 1 includes a main body section 11, an air pipe installation section 12 extends axially at the top end of the main body section 11, a flange 13 extends radially at the bottom end of the main body section 11, and a mounting metal sheet 2 is sleeved on the main body section 11 and is connected with the main body section 11. The flange 13 forms a card slot 14. The mounting metal sheet 2 includes a pressure plate 22, a through hole 21 is formed in the middle of the pressure plate 22, a barb 23 is protruded axially on the pressure plate 22, and the barb 23 is arranged around the through hole 21 and protrudes toward the top. 13 forms a slot 14, and the top of the barb 23 abuts against the outer surface of the main body section 11. There are two barbs 23, and the two barbs 23 are symmetrically arranged around the through hole 21. A V-shaped notch 231 is formed in the middle of the barbs 23, and the outer surface of the main body section 11 is caught inside the V-shaped notch 231. The diameter D1 of the main body section 11 is larger than the diameter D2 of the air pipe installation section 12, and the main body section 11 and the air pipe installation section 12 form a circular arc transition section 15. The pressure measuring interface 1 is punched and stretched from a metal sheet, and the mounting metal sheet 2 is punched and formed from a metal sheet.

In order to make the installation and positioning of the mounting metal sheet 2 more reliable, the applicant has improved the structure of the main body section 11. As shown in FIG. 7, a groove 16 is provided in the main body section 11, and the top of the barb 23 is embedded in the groove 16. As a person of ordinary skill in the art, it is also easy to think that a bump is provided on the main body section 11 and the top of the barb 23 abuts on the step.

Embodiment two:

As shown in FIG. 8, FIG. 9, FIG. 10, and FIG. 11, a draft fan includes a volute 100, a motor 300, a wind wheel, and a pressure measuring interface assembly 200. The volute 100 forms a cavity in which a wind wheel is installed. A pressure-measuring interface component 200 is installed on the casing 100. The pressure-measuring interface component 200 is a pressure-measuring interface component used in a volute described in the first embodiment. The wall surface of the volute is embedded in the pressure plate 22 and the flange. The inside of the slot 14 is formed between 13 and the pressure measuring channel 10 communicates with the cavity.

During installation, the pressure measuring interface 1 first passes through the reserved mounting hole on the volute from the volute 100, and then uses the mounting metal sheet 2 to press the pressure measuring interface 1, because the width of the through hole 21 of the mounting metal sheet 2 is larger than the main body The diameter D1 of the segment 11 is small. The mounting metal sheet 2 will deform upward to form a barb 23. The wall surface of the volute is embedded between the pressure plate 22 and the flange 13 to form a groove 14. The barb 23 acts as a buckle to fix it. Pressure measuring interface 1, easy to install.

The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited thereto. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention are equivalent. The replacement methods are all included in the protection scope of the present invention.

Claims

A pressure measuring interface component used on a volute, which is characterized by comprising a pressure measuring interface (1) and a mounting metal sheet (2), a pressure measuring channel (10) is formed in the middle of the pressure measuring interface (1), and a pressure measuring interface (1) Including a main body section (11), an air pipe installation section (12) is axially extended at the top end of the main body section (11), a flange (13) is extended radially at the bottom end of the main body section (11), and metal is installed The sheet (2) is sleeved on the main body section (11) and forms a card slot (14) with the flange (13).
A pressure-measuring interface assembly for a volute according to claim 1, characterized in that the mounting metal sheet (2) includes a pressure plate (22), a through hole (21) is formed in the middle of the pressure plate (22), and A barb (23) is protruded axially on the pressure plate (22). The barb (23) is arranged around the through hole (21) and protrudes toward the top. The pressure plate (22) and the flange (13) form a slot (14). ), The top of the barb (23) rests on the outer surface of the main body section (11).
The pressure-measuring interface assembly for a volute according to claim 2, characterized in that a groove (16) or a projection is provided on the main body section (11), and the top of the barb (23) is embedded in the recess The inside of the groove (16) or the top of the barb (23) rests on the step.
The pressure-measuring interface assembly used on the volute according to claim 3, wherein the barbs (23) have two pieces, and the two barbs (23) are symmetrically arranged around the through hole (21).
The pressure-measuring interface assembly for a volute according to claim 4, characterized in that a V-shaped notch (231) is formed in the middle of the barbs (23), and the outer surface of the main body section (11) is stuck in a V-shape Inside the notch (231).
A pressure measuring interface assembly for a volute according to claim 1 or 2 or 3 or 4 or 5, characterized in that the diameter D1 of the main body section (11) is larger than the diameter D2 of the air pipe mounting section (12). The main body section (11) and the trachea installation section (12) form a circular arc transition section (15).
The pressure-measuring interface assembly used in a volute according to claim 6, characterized in that the pressure-measuring interface (1) is stamped and stretched from a metal sheet.
The pressure-measuring interface assembly for a volute according to claim 1 or 2 or 3 or 4 or 5, characterized in that the mounting metal sheet (2) is stamped and formed from a metal sheet.
An induced draft fan includes a volute (100), a motor (300), a wind wheel, and a pressure measuring interface assembly (200). A cavity for installing a wind wheel is formed in the volute (100), and a measurement is mounted on the volute (100). A pressure interface assembly (200), characterized in that the pressure measurement interface assembly (200) is a pressure measurement interface assembly used on a volute according to any one of claims 2 to 8, and a wall surface of the volute It is embedded in the clamping groove (14) formed between the pressure plate (22) and the flange (13), and the pressure measuring channel (10) is in communication with the cavity.