CN111266447B - Manufacturing method of pressure measuring structure, pressure measuring structure and flow velocity sensor - Google Patents
Manufacturing method of pressure measuring structure, pressure measuring structure and flow velocity sensor Download PDFInfo
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- CN111266447B CN111266447B CN202010145764.5A CN202010145764A CN111266447B CN 111266447 B CN111266447 B CN 111266447B CN 202010145764 A CN202010145764 A CN 202010145764A CN 111266447 B CN111266447 B CN 111266447B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
- B21D11/10—Bending specially adapted to produce specific articles, e.g. leaf springs
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/08—Measuring devices for evaluating the respiratory organs
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- Heart & Thoracic Surgery (AREA)
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- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a manufacturing method of a pressure taking structure, the pressure taking structure and a flow velocity sensor; the manufacturing method of the pressure taking structure comprises the following steps: (S1) providing a coating piece and a screen, wherein the coating piece comprises a first limiting section, a middle section and a second limiting section, one end of the middle section is connected with the first limiting section, the other end of the middle section is connected with the second limiting section, the length of the second limiting section is greater than that of the first limiting section, the outer edge of the screen is arranged on a pressure-bearing surface of the second limiting section, the middle section is bent relative to the second limiting section, the first limiting section is bent relative to the middle section, so that the first limiting section and the second limiting section are arranged at intervals relatively to form a clamping part, and the clamping part is extruded to clamp and fix the outer edge of the screen; (S2) bending the extending part of the second limiting section relative to the first limiting section in the direction close to the screen mesh to enable the second limiting section to be abutted against the screen mesh and drive the screen mesh to bend; (S3), applying a tension force to the screen to tension the screen.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a manufacturing method of a pressure measuring structure, the pressure measuring structure and a flow velocity sensor.
Background
The application of the screen is very wide, and the screen is large in screening and washing of industrial mining industry, such as coal and rare earth ore, and small in filtering of food factories. The current research shows that the stainless steel screen mesh has good linearity in the lung function test and can be applied to a pressure taking structure in a lung function tester.
However, the traditional screen has low pressure taking precision in the pressure taking process, and the test of the lung function is influenced.
Disclosure of Invention
On the basis, the manufacturing method of the pressure taking structure, the pressure taking structure and the flow velocity sensor are provided for solving the problems that the traditional screen has low pressure taking precision and influences the test of the lung function in the pressure taking process; the manufacturing method of the pressure taking structure, the pressure taking structure and the flow velocity sensor can enable the screen to keep tensioned and not to fall off easily, so that the front pressure and the rear pressure of the screen are stable when the pressure taking structure is used, and the pressure taking accuracy is improved.
The specific technical scheme is as follows:
in one aspect, the present application relates to a method for manufacturing a pressure measurement structure, including:
(S1) providing a coating piece and a screen, wherein the coating piece comprises a first limiting section, a middle section and a second limiting section, one end of the middle section is connected with the first limiting section, the other end of the middle section is connected with the second limiting section, the length of the second limiting section is greater than that of the first limiting section, the outer edge of the screen is arranged on the pressure-bearing surface of the second limiting section, the middle section is bent relative to the second limiting section, the first limiting section is bent relative to the middle section, so that the first limiting section and the second limiting section are arranged at intervals relative to form a clamping part, and the clamping part is extruded to clamp and fix the outer edge of the screen;
(S2) bending the extending part of the second limiting section relative to the first limiting section along the direction close to the screen mesh to enable the second limiting section to be abutted against the screen mesh and drive the screen mesh to bend;
(S3), applying a tension force to the screen to tension the screen.
The technical solution is further explained below:
in one embodiment, the step of applying a tensioning force to the screen to tension the screen comprises:
and applying a tensioning force for tensioning the screen mesh to the protruding part of the second limiting section relative to the first limiting section.
In one embodiment, the step of pressing the clamping portion to clamp and fix the outer edge of the screen mesh comprises:
and extruding the clamping part along the thickness direction of the screen to enable the clamping part to clamp and fix the outer edge of the screen.
In one embodiment, the step of bending the middle section relative to the second limiting section comprises:
and bending the middle section relative to the second limiting section to enable the middle section to be bent relative to the second limiting section to enable an included angle between the middle section and the second limiting section to be a, wherein a is more than or equal to 85 degrees and less than or equal to 95 degrees.
In one embodiment, the step of bending the first limiting section relative to the middle section to allow the first limiting section and the second limiting section to be arranged at an interval relative to each other to form a clamping portion includes:
bending the first limiting section relative to the middle section to enable the first limiting section and the second limiting section to be arranged at intervals relatively to form a clamping part, wherein the included angle between the first limiting section and the middle section is b, and b is more than or equal to 85 degrees and less than or equal to 95 degrees.
In one embodiment, before bending the middle section relative to the second limiting section, the method further comprises:
and heating the screen and the cladding piece at the temperature of 40-60 ℃.
In one embodiment, the screen is a circular screen, and the applying direction of the tension force is radial to the circular screen.
In one embodiment, the overmold is annular.
On the other hand, the application also relates to a pressure-taking structure which is manufactured by the manufacturing method of the pressure-taking structure in any embodiment.
In another aspect, the present application also relates to a flow rate sensor including the pressure measurement structure in the above embodiment.
When the pressure measuring structure, the pressure measuring structure and the flow velocity sensor are used, the outer edge of the screen is arranged on the pressure bearing surface of the second limiting section, the middle section is bent relative to the second limiting section, the first limiting section is bent relative to the middle section, so that the first limiting section and the second limiting section are arranged at intervals relatively to form a clamping part, the clamping part is extruded to clamp and fix the outer edge of the screen, and at the moment, the screen and the cladding part are limited from falling off; further, bending the extending part of the second limiting section, which is opposite to the first limiting section, in the second limiting section along a direction close to the screen mesh so that the second limiting section is abutted against the screen mesh and drives the screen mesh to bend, and at the moment, mutually limiting the bent part of the screen mesh and the extending part of the second limiting section, which is opposite to the first limiting section, so as to further limit the screen mesh and the coating piece from falling off; and then, a tensioning force for tensioning the screen is applied to the part, corresponding to the first limiting section, of the second limiting section, so that the screen is kept in a tensioning state, the front and rear pressure of the screen is stable when the screen is used, and the pressure taking accuracy is improved.
Drawings
FIG. 1 is a flow chart of a method of fabricating a pressure measurement structure;
FIG. 2 is a schematic diagram of a method of fabricating a pressure measurement structure;
fig. 3 is a schematic structural diagram of a pressure measurement structure.
Description of reference numerals:
100. a pressure taking structure; 110. a covering member; 112. a first limiting section; 114. a middle section; 116. a second limiting section; 118. a clamping portion; 120. and (4) screening.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. It will be understood that when an element is referred to as being "secured to" another element, it can be integral with the other element or can be removably connected to the other element.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1 to 2, in an embodiment, a method for manufacturing a pressure obtaining structure may be used to manufacture the pressure obtaining structure 100 shown in fig. 3. The manufacturing method of the pressure taking structure comprises the following steps:
(S1) providing a wrapping piece 110 and a screen mesh 120, wherein the wrapping piece 110 comprises a first limiting section 112, an intermediate section 114 and a second limiting section 116, one end of the intermediate section 114 is connected with the first limiting section 112, the other end of the intermediate section is connected with the second limiting section 116, the length of the second limiting section 116 is larger than that of the first limiting section 112, the outer edge of the screen mesh 120 is arranged on the pressure-bearing surface of the second limiting section 116, the intermediate section 114 is bent relative to the second limiting section 116, the first limiting section 112 is bent relative to the intermediate section 114, so that the first limiting section 112 and the second limiting section 116 are arranged at intervals relatively to form a clamping part 118, and the clamping part 118 is extruded to clamp and fix the outer edge of the screen mesh 120;
specifically, as shown in fig. 3, the covering element 110 may be an annular structure, and the first position-limiting section 112, the middle section 114 and the second position-limiting section 116 may be an integrally formed structure or the first position-limiting section 112, the middle section 114 and the second position-limiting section 116 may be fixedly connected by corresponding fixing structures.
Specifically, when the outer edge of the screen 120 is disposed on the pressure-bearing surface of the second position-limiting section 116, the length of the screen 120 disposed on the pressure-bearing surface of the second position-limiting section 116 may be set as required, and the bending amount of the screen 120 may be controlled by controlling the length of the screen 120 disposed on the pressure-bearing surface of the second position-limiting section 116.
Specifically, the middle section 114 may be bent with respect to the second position-limiting section 116 by a punching device, the first position-limiting section 112 may be bent with respect to the middle section 114 by a punching device, and the clamping portion 118 may be pressed by a pressing device so that the clamping portion 118 clamps the outer edge of the fixed screen 120. As shown in fig. 2, in the present embodiment, the urging direction of the pressing nip 118 is shown as F1 in fig. 2.
(S2), bending the protruding part of the second position-limiting section 116 relative to the first position-limiting section 112 in the direction close to the screen 120, so that the second position-limiting section 116 abuts against the screen 120 and drives the screen 120 to bend.
Specifically, the protruding portion of the second position-limiting section 116 relative to the first position-limiting section 112 may be bent in a direction approaching the screen 120 by a punching device.
(S3), a tension force is applied to the screen cloth 120 to tension the screen cloth 120.
Specifically, the screen 120 may be pulled by a linear drive mechanism, and a tensioning force may be applied to the screen 120 to tension the screen 120.
It should be noted that the space between the screen 120 and the covering member 110 shown in fig. 2 is for convenience of illustrating the manufacturing method of the whole pressure extraction structure, and does not represent the space between the screen 120 and the covering member 110 in the manufactured pressure extraction structure 100.
When the manufacturing method of the pressure taking structure is used, the outer edge of the screen mesh 120 is arranged on the pressure bearing surface of the second limiting section 116, the middle section 114 is bent relative to the second limiting section 116, the first limiting section 112 is bent relative to the middle section 114, so that the first limiting section 112 and the second limiting section 116 are arranged at intervals relatively to form the clamping part 118, the clamping part 118 is extruded, so that the clamping part 118 clamps and fixes the outer edge of the screen mesh 120, and at the moment, the screen mesh 120 is limited from falling off from the cladding part 110; further, bending the extending portion of the second position-limiting section 116, which is opposite to the first position-limiting section 112, in the direction close to the screen 120, so that the second position-limiting section 116 abuts against the screen 120 and drives the screen 120 to bend, and at this time, the bent portion of the screen 120 and the extending portion of the second position-limiting section 116, which is opposite to the first position-limiting section 112, are mutually limited to further limit the falling-off between the screen 120 and the covering member 110; then, a tension force for tensioning the screen 120 is applied to the protruding portion of the second position-limiting section 116 opposite to the first position-limiting section 112, so that the screen 120 is kept in a tensioned state, and the pressure before and after the screen 120 is stable during use, thereby improving the accuracy of pressure measurement.
Specifically, the mesh number of the screen 120 is 300-500 mesh, and the thickness is 0.01-0.1 mm.
On the basis of the above embodiment, the step of applying a tension force to the screen 120 to tension the screen 120 includes: a tensioning force is applied to the extended portion of the second restraint section 116 opposite the first restraint section 112 to tension the screen 120.
Specifically, a tension force for tensioning the screen cloth 120 may be applied to the protruding portion of the second stopper segment 116 opposite to the first stopper segment 112 by a linear driving structure. Specifically, when the screen 120 is circular, the applying direction of the tension is a radial direction of the screen 120. As shown in fig. 2, in the present embodiment, the direction of application of the tension is shown as F2 in fig. 2.
Further, the step of pressing the clamping portion 118 to make the clamping portion 118 clamp the outer edge of the fixed screen 120 includes: pressing the clamp 118 in the thickness direction of the screen 120 causes the clamp 118 to clamp and fix the outer edge of the screen 120. In particular, the clamping portion 118 may be pressed by a pressing device, enabling the clamping portion 118 to grip the outer edge of the screen cloth 120. As shown in fig. 2, in the present embodiment, the urging direction of the pressing nip 118 is shown as F1 in fig. 2.
Further, on the basis of any of the above embodiments, the step of bending the middle section 114 relative to the second limiting section 116 includes: bending the middle section 114 relative to the second limiting section 116 to bend the middle section 114 relative to the second limiting section 116 to make an included angle between the middle section 114 and the second limiting section 116 be a, wherein a is more than or equal to 85 degrees and less than or equal to 95 degrees, so that the second limiting section 116 and the middle section 114 can limit the screen mesh 120 to fall off in the range. Specifically, a may be 85 °, 90 °, and 95 °.
Further, on the basis of any of the above embodiments, the step of bending the first position-limiting section 112 relative to the middle section 114 to allow the first position-limiting section 112 and the second position-limiting section 116 to be oppositely disposed at an interval to form the clamping portion 118 includes: bend the relative interlude 114 of first spacing section 112 and make first spacing section 112 and the relative interval setting of second spacing section 116 form clamping part 118, and the contained angle of first spacing section 112 and interlude 114 is b, and wherein, 85 degrees b is no less than or equal to 95, so, when this within range, the spacing section of second 116 and interlude 114 can restrict screen cloth 120 and drop. Specifically, b may be 85 °, 90 °, and 95 °. In this embodiment, the first position-limiting section 112 is perpendicular to the middle section 114, the second position-limiting section 116 is perpendicular to the middle section 114, and the first position-limiting section 112 and the second position-limiting section 116 are parallel.
As shown in fig. 1, on the basis of any of the above embodiments, before the bending of the middle section 114 relative to the second position-limiting section 116, the method further includes: the screen 120 and the covering member 110 are heated to a temperature of 40 ℃ to 60 ℃. Specifically, the screen 120 and the covering member 110 may be disposed on a corresponding mold, and the mold may be heated; further, in this temperature range, the screen 120 and the covering member 110 are more easily bent and deformed and have higher strength after bending, and in this temperature range, when the screen 120 is tensioned, the screen 120 can maintain a permanent tensioned state after the screen 120 is cooled; specifically, the heating temperature may be 40 ℃, 45 ℃, 50 ℃, 55 ℃ and 60 ℃.
In any of the above embodiments, the screen 120 is a circular screen 120, and the tensioning force is applied in a radial direction of the circular screen 120, so that the screen 120 is kept tensioned by applying the tensioning force to the circular screen 120 in the radial direction of the circular screen 120.
In any of the above embodiments, the covering member 110 has a circular ring shape, and the screen 120 has a circular shape, and the screen 120 can be completely covered by the circular ring-shaped covering member 110.
As shown in fig. 3, an embodiment further relates to a pressure tapping structure 100, which is manufactured by using the manufacturing method of the pressure tapping structure in any of the above embodiments.
An embodiment also relates to a flow rate sensor, which comprises the pressure tapping structure 100 in the above embodiment.
When the pressure measuring structure 100 and the flow rate sensor are used, the outer edge of the screen mesh 120 is arranged on the pressure bearing surface of the second limiting section 116, the middle section 114 is bent relative to the second limiting section 116, the first limiting section 112 is bent relative to the middle section 114, so that the first limiting section 112 and the second limiting section 116 are arranged at intervals relatively to form the clamping part 118, the clamping part 118 is extruded, so that the clamping part 118 clamps and fixes the outer edge of the screen mesh 120, and at this time, the screen mesh 120 and the cladding member 110 are prevented from falling off; further, bending the extending portion of the second position-limiting section 116, which is opposite to the first position-limiting section 112, in the direction close to the screen 120, so that the second position-limiting section 116 abuts against the screen 120 and drives the screen 120 to bend, and at this time, the bent portion of the screen 120 and the extending portion of the second position-limiting section 116, which is opposite to the first position-limiting section 112, are mutually limited to further limit the falling-off between the screen 120 and the covering member 110; then, a tension force for tensioning the screen 120 is applied to the protruding portion of the second position-limiting section 116 opposite to the first position-limiting section 112, so that the screen 120 is kept in a tensioned state, and the pressure before and after the screen 120 is stable during use, thereby improving the accuracy of pressure measurement. The flow rate sensor includes the above-described pressure measuring structure 100, and detects the flow rate of the gas by calculating the pressure difference across the screen 120.
Furthermore, it is to be understood that the terms "vertical," "horizontal," "left," "right," and the like as used herein are for purposes of illustration only and are not intended to represent the only embodiments. And the terms "lower", "upper", "front", "rear", "left", "right", "inner", "outer", "top", "bottom", "one side", "the other side", "one end", "the other end", etc. indicate positional relationships based on the positional relationships shown in the drawings; the terms "first," "second," and the like are used herein to distinguish one structural element from another. These terms are merely for convenience in describing the present invention and for simplicity in description, and are not to be construed as limiting the present invention.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A manufacturing method of a pressure taking structure is characterized by comprising the following steps:
(S1) providing a coating piece and a screen, wherein the coating piece comprises a first limiting section, a middle section and a second limiting section, one end of the middle section is connected with the first limiting section, the other end of the middle section is connected with the second limiting section, the length of the second limiting section is greater than that of the first limiting section, the outer edge of the screen is arranged on the pressure-bearing surface of the second limiting section, the middle section is bent relative to the second limiting section, the first limiting section is bent relative to the middle section, so that the first limiting section and the second limiting section are arranged at intervals relative to form a clamping part, and the clamping part is extruded to clamp and fix the outer edge of the screen;
(S2) bending the extending part of the second limiting section relative to the first limiting section along the direction close to the screen mesh to enable the second limiting section to be abutted against the screen mesh and drive the screen mesh to bend;
(S3), applying a tension force to the screen to tension the screen.
2. The method of manufacturing a pressure extraction structure according to claim 1, wherein the step of applying a tension force to the screen to tension the screen includes:
and applying a tensioning force for tensioning the screen mesh to the protruding part of the second limiting section relative to the first limiting section.
3. The method for manufacturing a pressure tapping structure according to claim 1, wherein the step of pressing the clamping portion to clamp and fix the outer edge of the screen by the clamping portion includes:
and extruding the clamping part along the thickness direction of the screen to enable the clamping part to clamp and fix the outer edge of the screen.
4. The method for manufacturing a pressure tapping structure according to claim 1, wherein the step of bending the middle section relative to the second limiting section comprises:
and bending the middle section relative to the second limiting section to enable the middle section to be bent relative to the second limiting section to enable an included angle between the middle section and the second limiting section to be a, wherein a is more than or equal to 85 degrees and less than or equal to 95 degrees.
5. The method for manufacturing a pressure tapping structure according to claim 1, wherein the step of bending the first limiting section relative to the middle section to allow the first limiting section and the second limiting section to be arranged at an interval relative to each other to form a clamping portion comprises:
bending the first limiting section relative to the middle section to enable the first limiting section and the second limiting section to be arranged at intervals relatively to form a clamping part, wherein the included angle between the first limiting section and the middle section is b, and b is more than or equal to 85 degrees and less than or equal to 95 degrees.
6. The method for manufacturing a pressure tapping structure according to claim 1, further comprising, before bending the middle section relative to the second limiting section:
and heating the screen and the cladding piece at the temperature of 40-60 ℃.
7. The method for manufacturing a pressure tapping structure according to claim 1, wherein the screen is a circular screen, and the direction of application of the tension force is a radial direction of the circular screen.
8. The method for manufacturing a pressure tapping structure according to any one of claims 1 to 7, wherein the covering member is annular.
9. A pressure tapping structure characterized by being produced by the method for producing a pressure tapping structure according to any one of claims 1 to 8.
10. A flow rate sensor comprising the pressure tapping structure according to claim 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010145764.5A CN111266447B (en) | 2020-03-05 | 2020-03-05 | Manufacturing method of pressure measuring structure, pressure measuring structure and flow velocity sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010145764.5A CN111266447B (en) | 2020-03-05 | 2020-03-05 | Manufacturing method of pressure measuring structure, pressure measuring structure and flow velocity sensor |
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| Publication Number | Publication Date |
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| CN111266447A CN111266447A (en) | 2020-06-12 |
| CN111266447B true CN111266447B (en) | 2021-06-18 |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3635214A (en) * | 1970-07-29 | 1972-01-18 | William A Rand | Visual pulmonary meter |
| CN2374282Y (en) * | 1999-04-08 | 2000-04-19 | 颜春夏 | screen frame |
| CN2381404Y (en) * | 1999-07-15 | 2000-06-07 | 淄博吉尔实业发展有限公司 | Prestressed tensioner of vibration screen |
| CN202033057U (en) * | 2011-01-29 | 2011-11-09 | 安钢集团自动化有限责任公司 | Plug-in type pressure acquiring mechanism |
| CN204892701U (en) * | 2015-06-15 | 2015-12-23 | 浙江海德曼过滤技术有限公司 | Outer protecting wire net is rolled up both ends and is connected with mould die head structure |
| CN209318568U (en) * | 2018-11-27 | 2019-08-30 | 保泰(佛冈)器材有限公司 | A kind of sieve buckling device |
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2020
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