Detachable V-cone flowmeter for test

Abstract

The utility model relates to a detachable V-cone flow meter for a test, which comprises a measuring tube provided with a positive pressure tapping tube and a negative pressure tapping tube; the supporting pipe is arranged corresponding to the negative pressure taking pipe; the negative pressure pipe is connected with the supporting pipe; the cone is arranged on the negative pressure pipe in a sleeving manner; the supporting and positioning assembly is used for supporting the cone; the locking component is used for being in locking fit with the negative pressure pipe, and the locking component is in abutting fit with the supporting and positioning assembly so as to limit the cone in the axial direction of the measuring pipe. By adopting the technical means shown in the application, in the test process, different cones can be conveniently disassembled and replaced through the locking part for performance test, after the test is completed, the finally used cone is selected, and the cone can be used for a long time by welding the supporting column with the inner wall of the measuring tube. According to the detachable V-cone flowmeter for the test, the manufacturing cost in the test process is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of flow measurement, in particular to a detachable V-cone flowmeter for testing. Background Art

[0002] The V-cone flowmeter is a differential pressure flowmeter, and its working principle is the same as that of the standard throttling device, that is, based on the fluid continuity equation and the Bernoulli equation. When the fluid flows through the V-shaped cone installed coaxially with the pipeline, the flow beam is locally contracted to accelerate the fluid flow rate, reaching the maximum at the maximum diameter of the V-shaped cone, so that the static pressure drops, and a low-pressure end is formed at the downstream end of the V-shaped cone. In this way, a pressure difference △P is generated before and after the V-shaped cone. According to the relationship that the square root of the differential pressure is proportional to the flow rate of the fluid, the differential pressure △P generated before and after the cone is measured to achieve the measurement of the fluid flow rate.

[0003] V-cone flowmeter is mainly used for flow measurement of gas, steam and liquid. Since the V-shaped structure is a fluid sweeping structure, it will not intercept any gas, liquid or solid contaminants entrained in the fluid. It is very suitable for flow measurement of dirty fluids, such as coke oven gas, wet gas, etc., especially for measuring blast furnace gas. It has a self-cleaning effect and the pressure pipe is not easy to be blocked.

[0004] At present, when assembling the existing V-cone flowmeter, the cone and the negative pressure tube are welded together. After welding, the negative pressure tube is aligned with the negative pressure hole of the V-cone measuring tube to complete the assembly and welding. The support plate is then welded to the V-cone cone and the inner surface of the V-cone measuring tube respectively to assemble into an integrated structure. For V-cone flowmeters used for experiments or tests, the cone needs to be disassembled and different cone structures installed for testing. However, the existing integrated V-cone flowmeter cannot disassemble and replace the cone and can only be dismantled and replaced destructively, resulting in high manufacturing costs. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a detachable V-cone flowmeter for testing, which is used to solve the problem that the cone of the existing integrated V-cone flowmeter cannot be disassembled and replaced and can only be dismantled and replaced destructively, resulting in high manufacturing costs.

[0006] In order to achieve the above-mentioned and other related purposes, the utility model provides a detachable V-cone flowmeter for testing, comprising:

[0007] A measuring tube having a fluid passage in the axial direction, and a positive pressure taking tube and a negative pressure taking tube are sequentially arranged on the side wall of the measuring tube along the flow direction of the fluid;

[0008] A support tube, arranged corresponding to the negative pressure taking tube, the support tube is located in the fluid channel, and the support tube extends along the radial direction of the measuring tube;

[0009] A negative pressure tube connected to the support tube, the extension direction of the negative pressure tube is the same as the flow direction of the fluid, and the negative pressure tube is provided with a first limiting portion;

[0010] A cone is sleeved on the negative pressure tube, and a first matching portion and a second matching portion are provided on the cone, wherein the first matching portion is used for limiting matching with the first limiting portion;

[0011] A support and positioning assembly, comprising a positioning sleeve and a plurality of support columns, wherein the plurality of support columns are evenly distributed on the side wall of the positioning sleeve along the circumferential direction, the support columns are used to cooperate with the inner wall of the measuring tube to support the cone, the positioning sleeve is provided with a through hole for penetrating the negative pressure tube along the axial direction, the positioning sleeve is provided with a second limiting portion around the through hole, and the second limiting portion is used to cooperate with the second matching portion in a limiting manner;

[0012] A locking component is used to be locked with the negative pressure tube, and the locking component is abutted with the supporting and positioning assembly to limit the axial position of the cone along the measuring tube.

[0013] Optionally, a plurality of pressure-taking holes are evenly formed on the side wall of the locking component along the circumferential direction, and the pressure-taking holes are connected to the fluid channel.

[0014] Optionally, four pressure-taking holes are evenly formed on the side wall of the locking component along the circumferential direction, and the pressure-taking holes extend along the radial direction of the locking component.

[0015] Optionally, the axis of the negative pressure tube coincides with the axis of the measuring tube.

[0016] Optionally, the negative pressure tube is provided with an external thread, the locking component is provided with an internal thread, and the locking component is threadedly connected to the negative pressure tube.

[0017] Optionally, the first matching portion is abuttingly matched with the first limiting portion, and the second matching portion is concave-convexly matched with the second limiting portion.

[0018] Optionally, three support columns are evenly distributed on the side wall of the positioning sleeve along the circumferential direction.

[0019] Optionally, a positive pressure measuring port and a negative pressure measuring port are sequentially provided on the side wall of the measuring tube along the flow direction of the fluid, and a first tube seat and a second tube seat are respectively provided on the outer wall of the measuring tube corresponding to the positive pressure measuring port and the negative pressure measuring port, wherein the first tube seat is used to install the positive pressure taking tube, and the second tube seat is used to install the negative pressure taking tube.

[0020] Optionally, the first tube seat and the second tube seat are both welded and fixed to the measuring tube, the positive pressure taking tube is welded and fixed to the first tube seat, the negative pressure taking tube is welded and fixed to the second tube seat, the support tube is welded and fixed to the measuring tube, and the negative pressure tube is welded and fixed to the support tube.

[0021] Optionally, both ends of the measuring tube in the axial direction are provided with positioning portions for positioning and installing the connecting flange.

[0022] As described above, the utility model has the following beneficial effects: the cone is sleeved on the negative pressure tube, and the first limiting portion provided on the negative pressure tube is limited and matched with the first matching portion on the cone, so as to limit the axial installation of the cone on the negative pressure tube; the support column is matched with the inner wall of the measuring tube to provide support for the cone structure; the second limiting portion provided on the positioning sleeve is limited and matched with the second matching portion on the cone, the locking portion is locked with the negative pressure tube, and the locking portion is abutted with the supporting positioning assembly, so as to apply matching pressure to the second limiting portion and the second matching portion, so as to achieve axial limiting of the cone along the measuring tube. By adopting the technical means shown in this application, during the test process, different cones can be conveniently disassembled and replaced by the locking portion for performance testing. After the test / test is completed, the final cone to be used is selected, and the support column is welded to the inner wall of the measuring tube, so that it can be used for a long time. The detachable V-cone flowmeter for testing proposed in this application effectively reduces the manufacturing cost during the test process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The cross-sectional structure diagram of a detachable V-cone flowmeter for testing shown in an embodiment of the present application is shown;

[0024] Figure 2 Display as Figure 1 Schematic diagram of the structure of the measuring tube;

[0025] Figure 3 Display as Figure 1 Schematic diagram of the structure of the mesocone;

[0026] Figure 4 Display as Figure 1 Schematic diagram of the structure of the medium negative pressure tube;

[0027] Figure 5 Display as Figure 1 A schematic diagram of the structure of the middle support positioning assembly;

[0028] Figure 6 Display as Figure 5 Schematic diagram of the AA section structure;

[0029] Figure 7 Display as Figure 1 Schematic diagram of the structure of the locking component.

[0030] Description of Reference Numerals

[0031] Measuring tube 1, fluid channel 101, positive pressure measuring port 102, negative pressure measuring port 103, positioning part 104, positive pressure taking tube 2, negative pressure taking tube 3, support tube 4, negative pressure tube 5, first limiting part 501, external thread 502, cone 6, first matching part 601, second matching part 602, support and positioning assembly 7, positioning sleeve 701, penetration hole 701a, second limiting part 701b, support column 702, locking component 8, pressure taking hole 801, internal thread 802, first tube seat 9, second tube seat 10, connecting flange 11. DETAILED DESCRIPTION

[0032] The following is an explanation of the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0033] See also Figures 1 to 7 . It should be noted that the illustrations provided in this embodiment only illustrate the basic concept of the utility model in a schematic manner, so the diagram only shows the components related to the utility model rather than being drawn according to the number, shape and size of the components during actual implementation. During actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated. The structure, proportion, size, etc. illustrated in the drawings attached to this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the restrictive conditions for the implementation of the utility model, so they have no technical substantive significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in the utility model without affecting the effect and purpose that can be achieved by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of the implementation of the present utility model. Changes or adjustments to their relative relationships should be regarded as the scope of the implementation of the present utility model without substantially changing the technical content.

[0034] Before describing the embodiments of the utility model in detail, the application environment of the utility model is described first. The technology of the utility model is mainly applied to the field of flow measurement technology. The utility model is used to solve the problem that the cone of the existing integrated V-cone flowmeter cannot be disassembled and replaced, and can only be disassembled and replaced destructively, resulting in high manufacturing costs.

[0035] Please combine Figures 1 to 7 As shown, the utility model provides a detachable V-cone flowmeter for testing.

[0036] In an exemplary embodiment of the present application, a detachable V-cone flowmeter for testing includes: a measuring tube 1, which has a fluid channel 101 along the axial direction, and a positive pressure taking tube and a negative pressure taking tube are sequentially arranged on the side wall of the measuring tube 1 along the flow direction of the fluid; a support tube 4 is arranged corresponding to the negative pressure taking tube, the support tube 4 is located in the fluid channel 101, and the support tube 4 extends along the radial direction of the measuring tube 1; a negative pressure tube 5 is connected to the support tube 4, the extension direction of the negative pressure tube 5 is the same as the flow direction of the fluid, and the negative pressure tube 5 is provided with a first limiting portion 501; a cone 6 is sleeved on the negative pressure tube 5, and the cone 6 is provided with a first matching portion 601 and a second matching portion 602, and the first matching portion 601 is used to match the first limiting portion Part 501 is limited and matched; the supporting and positioning assembly 7 includes a positioning sleeve 701 and multiple support columns 702, and the multiple support columns 702 are evenly distributed on the side wall of the positioning sleeve 701 along the circumferential direction. The support columns 702 are used to cooperate with the inner wall of the measuring tube 1 to support the cone 6. The positioning sleeve 701 is axially provided with a penetration hole 701a for penetrating the negative pressure tube 5, and the positioning sleeve 701 is provided with a second limiting portion 701b around the penetration hole 701a, and the second limiting portion 701b is used to cooperate with the second matching portion 602 for limiting; a locking component 8, the locking component 8 is used to lock and match with the negative pressure tube 5, and the locking component 8 is abutted and matched with the supporting and positioning assembly 7 to limit the cone 6 along the axial direction of the measuring tube 1.

[0037] In this embodiment, the cone 6 is sleeved on the negative pressure tube 5, and the first limiting portion 501 provided on the negative pressure tube 5 is limited and matched with the first matching portion 601 on the cone 6, so as to limit the axial installation of the cone 6 on the negative pressure tube 5; the support column 702 is matched with the inner wall of the measuring tube 1 to provide support for the cone 6; the second limiting portion 701b provided on the positioning sleeve 701 is limited and matched with the second matching portion 602 on the cone 6, the locking portion 8 is locked with the negative pressure tube 5, and the locking portion 8 is abutted with the support positioning assembly 7, so as to apply matching pressure to the second limiting portion 701b and the second matching portion 602, so as to achieve axial limiting of the cone 6 along the measuring tube 1. By adopting the technical means shown in this application, during the test process, the locking portion 8 can be used to conveniently disassemble and replace different cones 6 for performance testing. After the test / test is completed, the cone 6 to be used is selected, and the support column 702 is welded to the inner wall of the measuring tube 1, so that it can be used for a long time. The present application proposes a detachable V-cone flowmeter for testing, which effectively reduces the manufacturing cost during the test process.

[0038] In an exemplary embodiment of the present application, a plurality of pressure holes 801 are evenly formed on the side wall of the locking component 8 along the circumferential direction, and the pressure holes 801 are in communication with the fluid channel 101 .

[0039] In this embodiment, a multi-hole pressure taking method at the negative pressure end is realized by opening a plurality of pressure taking holes 801 on the locking component 8, which can effectively improve the measurement stability.

[0040] In an exemplary embodiment of the present application, four pressure-taking holes 801 are evenly formed on the side wall of the locking component 8 along the circumferential direction, and the pressure-taking holes 801 extend along the radial direction of the locking component 8 .

[0041] In an exemplary embodiment of the present application, the axis of the negative pressure tube 5 coincides with the axis of the measuring tube 1 .

[0042] In this embodiment, by arranging the axis of the negative pressure tube 5 to coincide with the axis of the measuring tube 1, the cone 6 can be installed in the middle position of the fluid channel 101, so that the static pressure at the tail end of the cone 6 is maintained stable, thereby improving the accuracy of the measurement result.

[0043] In an exemplary embodiment of the present application, the negative pressure tube 5 is provided with an external thread 502 , the locking component 8 is provided with an internal thread 802 , and the locking component 8 is threadedly connected to the negative pressure tube 5 .

[0044] In this embodiment, the internal thread 802 on the locking component 8 is locked and fixed with the external thread 502 on the negative pressure tube 5. When the locking component 8 is tightened, the locking component 8 abuts against the supporting and positioning assembly 7 to apply pressure to the supporting and positioning assembly 7 along the axial direction of the measuring tube 1, thereby pressing and fixing the supporting and positioning assembly 7 and the cone 6 to achieve axial limitation of the cone 6 along the measuring tube 1.

[0045] In an exemplary embodiment of the present application, the first matching portion 601 is abuttingly matched with the first limiting portion 501, and the second matching portion 602 is concave-convexly matched with the second limiting portion 701b.

[0046] In an exemplary embodiment of the present application, three support columns 702 are evenly distributed along the circumferential direction on the side wall of the positioning sleeve 701 .

[0047] In this embodiment, according to the stability of the triangle, three positioning columns are evenly distributed along the circumference on the side wall of the positioning sleeve 701 in the embodiment of the present application to ensure that the cone 6 can be stably supported in the fluid channel 101 of the measuring tube 1.

[0048] In an exemplary embodiment of the present application, a positive pressure measuring port 102 and a negative pressure measuring port 103 are provided on the side wall of the measuring tube 1 in sequence along the flow direction of the fluid, and a first tube seat 9 and a second tube seat 10 are provided on the outer wall of the measuring tube 1 corresponding to the positive pressure measuring port 102 and the negative pressure measuring port 103, respectively. The first tube seat 9 is used to install a positive pressure taking tube, and the second tube seat 10 is used to install a negative pressure taking tube.

[0049] In this embodiment, the positive pressure taking tube and the negative pressure taking tube are installed by providing the first tube seat 9 and the second tube seat 10 to ensure the accuracy of the installation position and direction of the positive pressure taking tube and the negative pressure taking tube.

[0050] In an exemplary embodiment of the present application, the first tube seat 9 and the second tube seat 10 are both welded and fixed to the measuring tube 1, the positive pressure taking tube is welded and fixed to the first tube seat 9, the negative pressure taking tube is welded and fixed to the second tube seat 10, the support tube 4 is welded and fixed to the measuring tube 1, and the negative pressure tube 5 is welded and fixed to the support tube 4.

[0051] In an exemplary embodiment of the present application, both ends of the measuring tube 1 in the axial direction are provided with positioning portions 104 for positioning and installing the connecting flange 11 .

[0052] In this embodiment, the connecting flange 11 and the measuring tube 1 can be quickly positioned and installed by the positioning portion 104 provided on the measuring tube 1 for positioning and installing the connecting flange 11. After the connecting flange 11 and the measuring tube 1 are positioned and installed, the connecting flange 11 and the measuring tube 1 are welded and fixed.

[0053] Working principle: cone 6 is sleeved on negative pressure tube 5, and the first limiting part 501 provided on negative pressure tube 5 is limited and matched with the first matching part 601 on cone 6, so as to limit the axial installation of cone 6 on negative pressure tube 5; support is provided for cone 6 by matching the support column 702 with the inner wall of measuring tube 1; second limiting part 701b provided on positioning sleeve 701 is limited and matched with the second matching part 602 on cone 6, locking part 8 is locked with negative pressure tube 5, and locking part 8 is abutted with support positioning assembly 7, so as to apply matching pressure to second limiting part 701b and second matching part 602, so as to limit the axial position of cone 6 along measuring tube 1. By adopting the technical means shown in the present application, different cones 6 can be conveniently disassembled and replaced by locking part 8 for performance testing during the test process. After the test / test is completed, the final cone 6 is selected, and the support column 702 is welded with the inner wall of measuring tube 1, so that it can be used for a long time. The present application proposes a detachable V-cone flowmeter for testing, which effectively reduces the manufacturing cost during the test. Since the fluid resistance in the measuring tube 1 of the V-cone flowmeter with a single pressure-taking hole 801 is unevenly distributed, it is easy to affect the stability of the measurement result. The present application opens multiple pressure-taking holes 801 on the locking component 8 and adopts a multi-hole pressure-taking method, which can effectively improve the stability of the measurement result.

[0054] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A detachable V-cone flowmeter for testing, characterized in that: include: A measuring tube having a fluid passage in the axial direction, and a positive pressure taking tube and a negative pressure taking tube are sequentially arranged on the side wall of the measuring tube along the flow direction of the fluid; A support tube, arranged corresponding to the negative pressure taking tube, the support tube is located in the fluid channel, and the support tube extends along the radial direction of the measuring tube; A negative pressure tube connected to the support tube, the extension direction of the negative pressure tube is the same as the flow direction of the fluid, and the negative pressure tube is provided with a first limiting portion; A cone is sleeved on the negative pressure tube, and a first matching portion and a second matching portion are provided on the cone, wherein the first matching portion is used for limiting matching with the first limiting portion; A support and positioning assembly, comprising a positioning sleeve and a plurality of support columns, wherein the plurality of support columns are evenly distributed on the side wall of the positioning sleeve along the circumferential direction, the support columns are used to cooperate with the inner wall of the measuring tube to support the cone, the positioning sleeve is provided with a through hole for penetrating the negative pressure tube along the axial direction, the positioning sleeve is provided with a second limiting portion around the through hole, and the second limiting portion is used to cooperate with the second matching portion in a limiting manner; A locking component is used to be locked with the negative pressure tube, and the locking component is abutted with the supporting and positioning assembly to limit the axial position of the cone along the measuring tube.

2. The detachable V-cone flowmeter for testing according to claim 1, characterized in that: The side wall of the locking component is evenly provided with a plurality of pressure taking holes along the circumferential direction, and the pressure taking holes are communicated with the fluid channel.

3. The detachable V-cone flowmeter for testing according to claim 2, characterized in that: The side wall of the locking component is evenly provided with four pressure-taking holes along the circumferential direction, and the pressure-taking holes extend along the radial direction of the locking component.

4. The detachable V-cone flowmeter for testing according to claim 1 is characterized in that: The axis of the negative pressure tube coincides with the axis of the measuring tube.

5. The detachable V-cone flowmeter for testing according to claim 1, characterized in that: The negative pressure pipe is provided with an external thread, the locking component is provided with an internal thread, and the locking component is threadedly connected to the negative pressure pipe.

6. The detachable V-cone flowmeter for testing according to claim 1, characterized in that: The first matching portion is in abutment with the first limiting portion, and the second matching portion is in concave-convex matching with the second limiting portion.

7. The detachable V-cone flowmeter for testing according to claim 1, characterized in that: The side wall of the positioning sleeve is evenly distributed with three supporting columns along the circumferential direction.

8. The detachable V-cone flowmeter for testing according to claim 1, characterized in that: A positive pressure measuring port and a negative pressure measuring port are sequentially arranged on the side wall of the measuring tube along the flow direction of the fluid, and a first tube seat and a second tube seat are respectively arranged on the outer wall of the measuring tube corresponding to the positive pressure measuring port and the negative pressure measuring port. The first tube seat is used to install the positive pressure taking tube, and the second tube seat is used to install the negative pressure taking tube.

9. The detachable V-cone flowmeter for testing according to claim 8, characterized in that: The first tube seat and the second tube seat are both welded and fixed to the measuring tube, the positive pressure taking tube is welded and fixed to the first tube seat, the negative pressure taking tube is welded and fixed to the second tube seat, the support tube is welded and fixed to the measuring tube, and the negative pressure tube is welded and fixed to the support tube.

10. The detachable V-cone flowmeter for testing according to claim 1, characterized in that: Both ends of the measuring tube in the axial direction are provided with positioning parts for positioning and installing the connecting flange.

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