Adjustable orifice plate flowmeter

Abstract

The utility model discloses an adjustable orifice plate flowmeter, which belongs to the technical field of auxiliary tools for flow metering, and comprises a seamless steel pipe, an orifice plate body, a firmware seat and a rotating body, a plurality of angle scales are carved at the top of the firmware seat, the angle scales are arranged at the radial position of the firmware seat, and the rotating body is arranged on the orifice plate body. A clamping sleeve is installed at the rotating body, a pointer corresponding to the angle scales is welded to the top of the clamping sleeve, a handle is installed on the outer wall of the clamping sleeve, the rotating angle of the pore plate body can be judged by observing the angle scales, corresponding to the top of the fixing piece base, of the pointer, meanwhile, a shaft rod is installed at the position of the handle through a threaded part, and therefore the rotating angle of the pore plate body can be judged. The second anti-skid rubber sleeve arranged at the bottom end of the shaft rod in a sleeving mode abuts against the inner wall of a positioning hole formed in the positioning plate, so that the friction force between the shaft rod and the positioning plate is increased, loosening of the handle can be effectively avoided, and then the adjusting precision of the pore plate body is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of auxiliary tools for flow measurement, and more specifically, to an adjustable orifice flowmeter. Background Technique

[0002] An orifice flowmeter is a high-range ratio differential pressure flow device composed of a standard orifice plate and a multi-parameter differential pressure transmitter, which can measure the flow of gases, steam, liquids, etc., and is widely used in the process control and measurement in fields such as petroleum, chemical industry, metallurgy, electric power, heating, and water supply. The throttling device, also known as a differential pressure flowmeter, is composed of a primary detection element (throttling element) and a secondary device (differential pressure transmitter and flow display instrument), and is widely used in the flow measurement of gases, steam, and liquids. The measurement principle is that the fluid flows through the throttling device in the pipeline, causing local contraction near the throttling element, i.e., the orifice plate. The flow rate increases, and a static pressure difference is generated on both sides of its upstream and downstream. The greater the flow rate, the greater the pressure difference. The differential pressure signal is converted into an analog signal output through a pipeline differential pressure transmitter, and then the measured flow rate is recorded, indicated, or adjusted by a secondary instrument or regulator to achieve the measurement of the fluid flow rate.

[0003] In modern industries, a flange is often used to fixedly connect the inlet horizontal pipe and the outlet horizontal pipe, which are connected by screws, and the orifice plate is clamped between the two for throttling to achieve the purpose of measuring the pressure difference. However, in the actual measurement and use process of this structure, especially when measuring steam media, there are often defects of insufficient airtightness, which easily affects the measurement accuracy. There is an existing patent for an adjustable orifice flowmeter, and the structure in the patent authorization number CN 211904249 U is simple, has high sealing performance, and is convenient to use.

[0004] However, in the patent with the authorization number CN 211904249 U, a handle is provided on the rotating body coaxially arranged with the first rotating shaft. When flow measurement is not required, the first rotating shaft is rotated by the handle to drive the vertical frame of the orifice plate to be arranged inside the seamless steel pipe, changing the cross-section. Since the rotation accuracy of the rotating body cannot be guaranteed when the rotating body is driven by the handle, the adjustment accuracy of the orifice plate cannot be guaranteed. Therefore, we propose an adjustable orifice flowmeter to solve the above existing problems. Content of the Utility Model

[0005] 1. Technical Problems to be Solved

[0006] In view of the problems existing in the prior art, the purpose of the present utility model is to provide an adjustable orifice flowmeter, which can judge the rotation angle of the orifice body by observing the angle scale set at the top of the pointer corresponding to the fixing seat, and at the same time, install a shaft rod at the handle through a threaded part, so that the second anti-slip rubber sleeve sleeved at the bottom end of the shaft rod abuts against the inner wall of the positioning hole opened at the positioning plate, thereby increasing the friction between the shaft rod and the positioning plate, effectively avoiding the loosening of the handle, and further ensuring the adjustment accuracy of the orifice body.

[0007] 2. Technical solution

[0008] To solve the above problems, the present utility model adopts the following technical solutions.

[0009] An adjustable orifice flowmeter includes a seamless steel pipe, an orifice body, a fixing seat and a rotating body. The top of the fixing seat is engraved with an angle scale, and a plurality of the angle scales are arranged at the radial position of the fixing seat;

[0010] A bushing is installed at the rotating body, a pointer corresponding to the angle scale is welded at the top of the bushing, and a handle is installed on the outer wall of the bushing;

[0011] A positioning plate arranged in a semi-circular structure is fixedly connected to the outer wall of the fixing seat close to the handle, and a positioning hole arranged in an arc structure is opened on the surface of the positioning plate;

[0012] A shaft rod whose bottom end extends to the inside of the positioning hole is installed through the part of the handle corresponding to the positioning hole. A threaded part that is screwed with the handle is opened on the outer wall of the shaft rod. A second anti-slip rubber sleeve is sleeved at the bottom end of the shaft rod, and the outer wall of the second anti-slip rubber sleeve abuts against the inner wall of the positioning hole.

[0013] Further, a first anti-slip rubber sleeve is sleeved on the outer wall of the handle, and anti-slip lines are arranged on the outer wall of the first anti-slip rubber sleeve.

[0014] Further, the inner diameter of the second anti-slip rubber sleeve is smaller than the outer diameter of the shaft rod, and anti-slip lines are arranged on the outer wall of the second anti-slip rubber sleeve.

[0015] Further, a vane is welded on the outer wall of the top end of the shaft rod, and two vanes are symmetrically arranged.

[0016] Further, a limiting block that abuts against the outer wall of the handle is integrally formed on the outer wall of the shaft rod below the vane.

[0017] Further, a screw hole is opened at the joint of the handle and the shaft rod, and the screw hole is screwed with the threaded part;

[0018] The limiting block is arranged in a circular structure, and the outer diameter of the limiting block is larger than the inner diameter of the screw hole.

[0019] 3. Beneficial effects

[0020] Compared with the prior art, the advantages of the present utility model are as follows:

[0021] (1) In this solution, when the staff drags the handle to drive the rotating body to drive the orifice plate body to rotate, the staff can judge the rotation angle of the orifice plate body by observing the angle scale set on the top of the pointer corresponding to the fixing seat. At the same time, the threaded part is used to install the shaft rod at the handle, so that the second anti-slip rubber sleeve sleeved at the bottom end of the shaft rod abuts against the inner wall of the positioning hole opened at the positioning plate, thereby increasing the friction force between the shaft rod and the positioning plate, effectively avoiding the loosening of the handle, and then ensuring the adjustment accuracy of the orifice plate body.

[0022] (2) In this solution, by sleeving the first anti-slip rubber sleeve on the handle and using the anti-slip lines provided on the outer wall of the first anti-slip rubber sleeve to increase the friction force with the hand of the operator, it is beneficial for the staff to operate the handle to drive the rotating body to rotate. Description of the drawings

[0023] Figure 1 is a three-dimensional structure schematic diagram of the present utility model;

[0024] Figure 2 is an enlarged schematic diagram of part A of the present utility model;

[0025] Figure 3 is a schematic diagram of the shaft rod structure of the present utility model;

[0026] Figure 4 is a schematic diagram of the internal structure of the seamless steel pipe of the present utility model.

[0027] Explanation of the reference numerals in the drawings:

[0028] 1. Seamless steel pipe; 2. Orifice plate body; 3. Fixing seat; 4. Rotating body; 5. Angle scale; 6. Card sleeve; 7. Pointer; 8. Handle; 9. First anti-slip rubber sleeve; 10. Positioning plate; 11. Positioning hole; 12. Shaft rod; 13. Threaded part; 14. Second anti-slip rubber sleeve; 15. Blade; 16. Limiting block. Specific implementation manners

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model; obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0030] Embodiment:

[0031] Please refer to Figures 1-4 , an adjustable orifice flowmeter, including a seamless steel pipe 1, an orifice plate body 2, a fixture seat 3 and a rotating body 4. Angular scales 5 are engraved on the top of the fixture seat 3, and a plurality of angular scales 5 are arranged in the radial position of the fixture seat 3;

[0032] A ferrule 6 is installed at the rotating body 4. A pointer 7 corresponding to the angular scale 5 is welded on the top of the ferrule 6, and a handle 8 is installed on the outer wall of the ferrule 6;

[0033] A positioning plate 10 arranged in a semicircular structure is fixedly connected to the outer wall of the fixture seat 3 close to the handle 8, and a positioning hole 11 arranged in an arc structure is opened on the surface of the positioning plate 10;

[0034] A shaft rod 12 with the bottom end extending to the inner side of the positioning hole 11 is installed through the part of the handle 8 corresponding to the positioning hole 11. A threaded part 13 screwed with the handle 8 is arranged on the outer wall of the shaft rod 12. A second anti-slip rubber sleeve 14 is sleeved on the bottom end of the shaft rod 12, and the outer wall of the second anti-slip rubber sleeve 14 abuts against the inner wall of the positioning hole 11;

[0035] It should be noted that during the use process after the installation of the adjustable orifice flowmeter, when the staff drags the handle 8 to drive the ferrule 6 to drive the rotating body 4 to drive the orifice plate body 2 to rotate, the staff can judge the rotation angle of the orifice plate body 2 by observing the angular scale 5 arranged on the top of the fixture seat 3 corresponding to the pointer 7. At the same time, the shaft rod 12 is installed at the handle 8 through the threaded part 13, so that the second anti-slip rubber sleeve 14 sleeved on the bottom end of the shaft rod 12 abuts against the inner wall of the positioning hole 11 opened at the positioning plate 10, thereby increasing the friction force between the shaft rod 12 and the positioning plate 10, effectively avoiding the loosening of the handle 8, and further ensuring the adjustment accuracy of the orifice plate body 2.

[0036] As Figure 1 shown, a first anti-slip rubber sleeve 9 is sleeved on the outer wall of the handle 8, and anti-slip lines are arranged on the outer wall of the first anti-slip rubber sleeve 9;

[0037] It should be noted that by sleeving the first anti-slip rubber sleeve 9 on the handle 8 and using the anti-slip lines arranged on the outer wall of the first anti-slip rubber sleeve 9 to increase the friction force with the operator's hand, it is beneficial for the staff to operate the handle 8 to drive the rotating body 4 to rotate.

[0038] As Figure 3As shown, a threaded hole is provided at the joint between the handle 8 and the shaft rod 12, and the threaded hole is screwed with the threaded portion 13. An outer wall of the shaft rod 12 below the vane 15 is integrally formed with a limiting block 16 that abuts against an outer wall of the handle 8. The limiting block 16 is arranged in a circular structure, and an outer diameter of the limiting block 16 is larger than an inner diameter of the threaded hole;

[0039] It should be noted that the shaft rod 12 is installed by using the threaded portion 13 provided on the shaft rod 12 to cooperate with the threaded hole provided on the handle 8, and at the same time, the shaft rod 12 is limited by the limiting block 16, so as to ensure that the bottom end of the shaft rod 12 exactly extends to the inside of the positioning hole 11.

[0040] As Figure 1 , Figure 3 shown, an inner diameter of the second anti-slip rubber sleeve 14 is smaller than an outer diameter of the shaft rod 12, and anti-slip lines are provided on an outer wall of the second anti-slip rubber sleeve 14;

[0041] It should be noted that the stability of the second anti-slip rubber sleeve 14 sleeved on the shaft rod 12 can be increased, and at the same time, the friction between the second anti-slip rubber sleeve 14 and the positioning hole 11 is increased, thereby ensuring the stability of the positioning of the handle 8.

[0042] As Figure 3 shown, vanes 15 are welded to an outer wall of a top end of the shaft rod 12, and two vanes 15 are symmetrically arranged.

[0043] It should be noted that by providing the vanes 15, it is convenient for manual driving of the shaft rod 12 to rotate, convenient for disassembling and assembling the shaft rod 12, and at the same time convenient for replacing the second anti-slip rubber sleeve 14 sleeved at the bottom end of the shaft rod 12.

[0044] During use: during the use process after the adjustable orifice flowmeter is installed, when a staff member drags the handle 8 to drive the ferrule 6 to drive the rotating body 4 to drive the orifice plate body 2 to rotate, the staff member observes the angle scale 5 provided on the top of the fixed seat 3 corresponding to the pointer 7, so as to be able to judge the rotation angle of the orifice plate body 2. At the same time, the shaft rod 12 is installed on the handle 8 through the threaded portion 13, so that the second anti-slip rubber sleeve 14 sleeved at the bottom end of the shaft rod 12 abuts against an inner wall of the positioning hole 11 provided on the positioning plate 10, thereby increasing the friction between the shaft rod 12 and the positioning plate 10, and effectively preventing the handle 8 from loosening.

[0045] The above is only a preferred specific embodiment of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent replacement or change, and should be covered by the protection scope of the present invention.

Claims

1. An adjustable orifice flowmeter, comprising a seamless steel pipe (1), an orifice body (2), a fastener seat (3) and a rotating body (4), characterized in that: An angular scale (5) is engraved on the top of the fixing base (3), and a plurality of angular scales (5) are arranged at radial positions of the fixing base (3); A ferrule (6) is installed at the rotating body (4), a pointer (7) corresponding to the angle scale (5) is welded on the top of the ferrule (6), and a handle (8) is installed on the outer wall of the ferrule (6); The fixing base (3) is fixedly connected to a positioning plate (10) arranged in a semicircular structure near the outer wall of the handle (8), and a positioning hole (11) arranged in an arc-shaped structure is provided on the surface of the positioning plate (10); A shaft rod (12) is installed through the portion of the handle (8) corresponding to the positioning hole (11), the bottom end of which extends to the inside of the positioning hole (11); the outer wall of the shaft rod (12) is provided with a threaded portion (13) threadedly connected to the handle (8); the bottom end of the shaft rod (12) is sleeved with a second anti-slip rubber sleeve (14), and the outer wall of the second anti-slip rubber sleeve (14) is in contact with the inner wall of the positioning hole (11).

2. An adjustable orifice flowmeter according to claim 1, characterized in that: The outer wall of the handle (8) is provided with a first anti-slip rubber sleeve (9), and the outer wall of the first anti-slip rubber sleeve (9) is provided with anti-slip patterns.

3. An adjustable orifice flowmeter according to claim 1, characterized in that: The inner diameter of the second anti-slip rubber sleeve (14) is smaller than the outer diameter of the shaft rod (12), and the outer wall of the second anti-slip rubber sleeve (14) is provided with anti-slip patterns.

4. An adjustable orifice flowmeter according to claim 1, characterized in that: A blade (15) is welded to the outer wall of the top end of the shaft rod (12), and two blades (15) are symmetrically arranged.

5. An adjustable orifice flowmeter according to claim 4, characterized in that: A limiting block (16) abutting against the outer wall of the handle (8) is integrally formed on the outer wall of the shaft rod (12) below the blade plate (15).

6. An adjustable orifice flowmeter according to claim 5, characterized in that: A screw hole is provided at the junction of the handle (8) and the shaft (12), and the screw hole is screwed to the threaded portion (13); The limiting block (16) is arranged in a circular structure, and the outer diameter of the limiting block (16) is greater than the inner diameter of the screw hole.

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