Double-probe vortex shedding flowmeter with redundancy function

Abstract

The utility model discloses a double-probe vortex shedding flowmeter with a redundancy function, which comprises a measuring tube, a first vortex shedding probe and a second vortex shedding probe, flanges are arranged on two sides of the measuring tube, a vortex generating body is arranged inside the measuring tube, a probe fixing seat is arranged on one side of the measuring tube, and the probe fixing seat is arranged on the other side of the measuring tube. A first probe hole and a second probe hole are respectively formed in the probe fixing seat, the first vortex street probe is fixedly inserted into the first probe hole, the second vortex street probe is fixedly inserted into the second probe hole, and a supporting cylinder is arranged on the probe fixing seat; the end portion of the first vortex street probe is arranged in the vortex generating body, the second vortex street probe is arranged outside the vortex generating body, the upper limit and the lower limit of the measuring range can be widened through the design of the second probe, and the problems that the measuring range is small and the shock resistance is poor when only the first vortex street probe is installed are solved through the second vortex street probe. The first vortex street probe and the second vortex street probe can be used alternately and do not need to be detached individually for replacement.

Description

Technical Field

[0001] The utility model relates to the technical field of instruments and meters, in particular to a double-probe vortex flowmeter with a redundant function. Background Art

[0002] The vortex flowmeter is a flow measuring instrument without moving parts. It has a wide range of applications, high measurement accuracy, low wear, linear output signals and can be transmitted over long distances. When the measured fluid passes through the generator in the pipeline, a vortex street will be formed. The probe installed in the pipeline will sense the frequency signal synchronized with the vortex street, which will be displayed as flow data after being processed by the transmitter.

[0003] At present, most of the existing vortex flowmeters are single-probe vortex flowmeters. If the probe is damaged, it cannot be used normally on site and needs to be removed and replaced. It is difficult to meet the requirements of chemical industry, nuclear power and other occasions with high reliability requirements for instruments. On the other hand, since the vortex flowmeter converts the detected vibration signal into an electrical signal, which is converted into the commonly used electrical signal or digital signal through the flow converter, it is greatly affected by the on-site installation conditions and installation environment, especially vibration interference is more common. The probe of one structure is very limited in the measurement range and working conditions, which will cause the problem of failure to measure or inaccurate measurement in some environments. Utility Model Content

[0004] The utility model aims to provide a double-probe vortex flowmeter with redundant function to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a dual-probe vortex flowmeter with redundant function, comprising a measuring tube, a first vortex probe and a second vortex probe, flanges are arranged on both sides of the measuring tube, a vortex generator is arranged inside the measuring tube, a probe fixing seat is arranged on one side of the measuring tube, a first probe hole and a second probe hole are respectively opened on the probe fixing seat, the first vortex probe is fixedly plugged into the first probe hole, the second vortex probe is fixedly plugged into the second probe hole, a supporting tube is arranged on the probe fixing seat, a flowmeter display is arranged at the end of the supporting tube, and a tightening nut is arranged between the supporting tube and the flowmeter display.

[0006] Preferably, one end of the first vortex probe passes through the measuring tube and extends to the vortex generating body.

[0007] Preferably, one end of the second vortex probe passes through the measuring tube and extends to the interior of the measuring tube.

[0008] Preferably, a first probe sealing ring is provided at the corner between the first vortex probe and the first probe hole.

[0009] Preferably, a second probe sealing ring is provided at the corner between the second vortex probe and the second probe hole.

[0010] Preferably, a fixing screw is provided between the probe fixing seat and the supporting tube, and an end of the fixing screw passes through the supporting tube and is threadedly connected to the probe fixing seat.

[0011] Preferably, the first vortex probe and the second vortex probe are electrically connected to the flow meter display respectively, and the vortex generator is perpendicular to the axis of the measuring tube.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model has the end of the first vortex street probe built into the vortex generating body, and the second vortex street probe is located outside the vortex generating body. The design of the second probe can widen the upper and lower limits of the measuring range. The second vortex street probe can compensate for the problems of small measuring range and poor shock resistance when only the first vortex street probe is installed. The first vortex street probe and the second vortex street probe can be used alternately without the need to disassemble them individually for replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of a double-probe vortex flowmeter with redundant function according to the utility model.

[0015] Figure 2 For this utility model Figure 1 Schematic diagram of the structure enlarged at point A in the middle.

[0016] Figure 3 It is a schematic diagram of the structure of the first probe hole and the second probe hole of the utility model.

[0017] In the figure: measuring tube 1; flange 2; probe fixing seat 3; first probe hole 31; second probe hole 32; support tube 4; flow meter display 5; vortex generating body 6; tightening nut 7; first vortex street probe 8; first probe sealing ring 81; second vortex street probe 9; second probe sealing ring 91; fixing screw 10. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figures 1 to 3The utility model provides a technical solution: a dual-probe vortex flowmeter with redundant function, including a measuring tube 1, a first vortex probe 8 and a second vortex probe 9, flanges 2 are fixed on both sides of the measuring tube 1, a vortex generator 6 is fixed inside the measuring tube 1, the vortex generator 6 is perpendicular to the axis of the measuring tube 1, the vortex generator 6 is used to generate a Karman vortex street, when the fluid flows through the vortex generator 6, two rows of vortices that change alternately are formed on both sides thereof, and these vortices are received by the detection probe and converted into electrical signals.

[0020] A probe fixing base 3 is fixedly installed on one side of the measuring tube 1, and a first probe hole 31 and a second probe hole 32 are respectively opened on the probe fixing base 3. The first vortex street probe 8 is fixedly plugged into the first probe hole 31, and the second vortex street probe 9 is fixedly plugged into the second probe hole 32. One end of the first vortex street probe 8 passes through the measuring tube 1 and extends to the vortex generating body 6, and one end of the second vortex street probe 9 passes through the measuring tube 1 and extends to the inside of the measuring tube 1.

[0021] The design of the second vortex probe 9 can widen the upper and lower limits of the measuring range, which is particularly evident for small-caliber and strong vibration interference occasions. The first vortex probe 8 and the second vortex probe 9 are probes of different structures and have different pressure taking methods. The measurement method of the second vortex probe 9 has a high local oscillation frequency and is more anti-interference. When the first vortex probe 8 and the second vortex probe 9 are working normally, the second vortex probe 9 can be used to detect the pipeline vibration model, and the first vortex probe 8 is used to detect the flow signal, and the vibration interference is analyzed and removed through the header program.

[0022] A first probe sealing ring 81 is bonded to the corner between the first vortex probe 8 and the first probe hole 31, and a second probe sealing ring 91 is bonded to the corner between the second vortex probe 9 and the second probe hole 32. The first probe sealing ring 81 prevents the fluid from escaping through the corner between the first vortex probe 8 and the first probe hole 31, and the second probe sealing ring 91 prevents the fluid from escaping through the corner between the second vortex probe 9 and the second probe hole 32.

[0023] A support tube 4 is fixed on the probe fixing seat 3, a fixing screw 10 is arranged between the probe fixing seat 3 and the support tube 4, the end of the fixing screw 10 passes through the support tube 4 and is screwed on the probe fixing seat 3, a flow meter display 5 is sleeved on the end of the support tube 4, a tightening nut 7 is installed between the support tube 4 and the flow meter display 5, and the first vortex probe 8 and the second vortex probe 9 are electrically connected to the flow meter display 5 respectively.

[0024] In short, the end of the first vortex probe 8 is built into the vortex generating body 6, and the end of the second vortex probe 9 is located outside the vortex generating body 9. The design of the second vortex probe 9 can widen the upper and lower limits of the measuring range. The second vortex probe 9 can compensate for the problems of small measuring range and poor shock resistance when only the first vortex probe 8 is installed. The first vortex probe 8 and the second vortex probe 9 can be used alternately without disassembling them individually for replacement.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dual-probe vortex flowmeter with redundant function, comprising a measuring tube (1), a first vortex probe (8) and a second vortex probe (9), characterized in that: Flanges (2) are provided on both sides of the measuring tube (1), a vortex generating body (6) is provided inside the measuring tube (1), a probe fixing seat (3) is provided on one side of the measuring tube (1), a first probe hole (31) and a second probe hole (32) are respectively provided on the probe fixing seat (3), a first vortex street probe (8) is fixedly plugged into the first probe hole (31), a second vortex street probe (9) is fixedly plugged into the second probe hole (32), a support tube (4) is provided on the probe fixing seat (3), and the support tube (4) A flow meter display (5) is provided at the end of the support tube (4), a tightening nut (7) is provided between the support tube (4) and the flow meter display (5), one end of the first vortex probe (8) passes through the measuring tube (1) and extends to the vortex generator (6), one end of the second vortex probe (9) passes through the measuring tube (1) and extends to the inside of the measuring tube (1), the first vortex probe (8) and the second vortex probe (9) are electrically connected to the flow meter display (5), respectively, and the axis of the vortex generator (6) is perpendicular to the axis of the measuring tube (1).

2. The dual-probe vortex flowmeter with redundant function according to claim 1, characterized in that: A first probe sealing ring (81) is provided at the corner between the first vortex probe (8) and the first probe hole (31).

3. The dual-probe vortex flowmeter with redundant function according to claim 1, characterized in that: A second probe sealing ring (91) is provided at the corner between the second vortex probe (9) and the second probe hole (32).

4. The dual-probe vortex flowmeter with redundant function according to claim 1, characterized in that: A fixing screw (10) is provided between the probe fixing seat (3) and the support tube (4), and an end of the fixing screw (10) passes through the support tube (4) and is screwed onto the probe fixing seat (3).

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