Double-probe anti-seismic vortex shedding flowmeter

Abstract

The utility model discloses a double-probe anti-seismic vortex shedding flowmeter, and particularly relates to the technical field of vortex shedding flowmeters, the double-probe anti-seismic vortex shedding flowmeter comprises a measuring tube, flanges fixedly installed at the two ends of the measuring tube and a vortex generating body arranged in the measuring tube, a fixed seat is fixedly installed on the outer top surface of the measuring tube, and a supporting cylinder is fixedly installed on the top surface of the fixed seat. The end, away from the fixing base, of the supporting cylinder is fixedly provided with a flow displayer, and the outer surface of the measuring pipe is sleeved with two damping sleeves. According to the double-probe anti-seismic vortex shedding flowmeter, in actual work, the two damping sleeves are arranged on the outer surface of the measuring pipe in a sleeving mode and fixed through the bolts, then the piston rod and the piston are pushed, nitrogen in the adjusting cylinder is conveyed into the air bag through the connecting pipe, the air bag is expanded, and the measuring pipe is fixed through the connecting pipe. And the air bag absorbs high-frequency vibration energy through elastic deformation, the vibration transmission efficiency is reduced, a user can conveniently observe the pressure in the air bag through the pressure sensor, and therefore vibration resistance is conveniently conducted on pipeline vibration.

Description

Technical Field

[0001] This utility model relates to the field of vortex flow meter technology, and in particular to a dual-probe anti-vibration vortex flow meter. Background Technology

[0002] A vortex flow meter is a flow measurement instrument without moving parts. It has the advantages of wide application range, high measurement accuracy, low wear, linear output signal and long-distance transmission. When the fluid being measured passes through the generator set in the pipe, a vortex street is formed. The probe set in the pipe will sense the frequency signal synchronized with the vortex street, which is then processed by the transmitter and displayed as flow data.

[0003] Searching, for example, reveals a utility model with announcement number CN222379133U, which discloses a dual-probe vortex flow meter with redundancy, including a measuring tube, a first vortex probe, and a second vortex probe. Flanges are provided on both sides of the measuring tube, and a vortex generator is provided inside the measuring tube. This utility model uses the second vortex probe to compensate for the problems of small measurement range and poor vibration resistance when only the first vortex probe is installed. However, the probe can not only sense the vortex force generated by the fluid, but also the pipe vibration caused by fluid scouring the pipe or other external factors. Pipe vibration will also act on the probe, interfering with the accuracy of the vortex flow meter. In severe cases, the vortex flow meter may not work. This utility model is not convenient for resisting pipe vibration. Therefore, in order to solve the above defects, the inventors propose a dual-probe vibration-resistant vortex flow meter. Utility Model Content

[0004] The main purpose of this invention is to provide a dual-probe anti-vibration vortex flow meter, which can effectively solve the problem that existing vortex flow meters are not convenient for resisting pipeline vibration.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A dual-probe anti-vibration vortex flow meter includes a measuring tube, flanges fixedly installed at both ends of the measuring tube, and a vortex generator located inside the measuring tube. A mounting base is fixedly installed on the outer top surface of the measuring tube, and a support cylinder is fixedly installed on the top surface of the mounting base. A flow display is fixedly installed at the end of the support cylinder away from the mounting base. Two shock-absorbing sleeves are fitted on the outer surface of the measuring tube. Air bladders are fixedly installed on the inner walls of both shock-absorbing sleeves, and both air bladders are in contact with the outer surface of the measuring tube. Pressure sensors are fixedly installed on the outer surfaces of both shock-absorbing sleeves, and an adjusting cylinder is fixedly installed on one side of the outer surfaces of both shock-absorbing sleeves.

[0007] Preferably, a connecting pipe with a valve is fixedly installed on one side of the outer surface of the regulating cylinder, and the connecting pipe passes through the shock-absorbing sleeve and is fixedly connected to the airbag. An air inlet pipe with a one-way valve is fixedly installed on one side of the outer surface of the regulating cylinder.

[0008] Preferably, a piston is slidably connected inside the adjusting cylinder, and a piston rod is fixedly installed on the middle of one side of the piston. A part of the piston rod is located inside the adjusting cylinder, and another part is located outside the adjusting cylinder. A push plate is fixedly installed on the end of the piston rod located outside the adjusting cylinder.

[0009] Preferably, two fastening plates are fixedly installed on the upper and lower sides of the outer surfaces of the two shock absorbers, and support rods are fixedly installed on the lower sides of the outer surfaces of the two shock absorbers. A fixing rod is fixedly installed on one side of the two support rods, and a limit hole is opened on the other side of the two support rods. The end of the fixing rod away from the support rod is rotatably connected to the limit plate.

[0010] Preferably, two probes are fixedly installed inside the measuring tube, and one end of one of the probes extends through the measuring tube to the vortex generator.

[0011] Preferably, the cross-sectional shape of the limiting plate and the cross-sectional shape of the limiting hole are both rectangular.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This utility model discloses a dual-probe anti-vibration vortex flow meter. By setting two damping sleeves, in actual operation, the two damping sleeves are fitted onto the outer surface of the measuring tube and fixed with bolts. Then, the piston rod and piston are pushed to transmit nitrogen gas in the regulating cylinder to the inside of the air bladder through the connecting pipe, causing the air bladder to expand. The air bladder absorbs high-frequency vibration energy through elastic deformation, reducing vibration transmission efficiency. The pressure sensor allows the user to easily observe the pressure inside the air bladder, thus facilitating the anti-vibration of the pipeline. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the shock-absorbing sleeve structure of this utility model;

[0016] Figure 3 This is a cross-sectional view of the adjusting cylinder of this utility model;

[0017] Figure 4 This is a schematic diagram of the support rod structure of this utility model;

[0018] Figure 5 This is a cross-sectional view of the measuring tube of this utility model.

[0019] In the diagram: 1. Measuring tube; 2. Flange; 3. Fixing base; 4. Support cylinder; 5. Flow indicator; 6. Shock absorber sleeve; 601. Airbag; 602. Pressure sensor; 603. Adjusting cylinder; 604. Connecting pipe; 605. Inlet pipe; 606. Piston; 607. Piston rod; 608. Push plate; 6011. Fastening plate; 6012. Support rod; 6013. Fixing rod; 6014. Limiting hole; 6015. Limiting plate; 101. Probe; 102. Vortex generator. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0021] This utility model discloses a dual-probe anti-vibration vortex flow meter, such as... Figure 1-5 As shown, the device includes a measuring tube 1, flanges 2 fixedly installed at both ends of the measuring tube 1, and a vortex generator 102 located inside the measuring tube 1. A mounting base 3 is fixedly installed on the outer top surface of the measuring tube 1, and a support cylinder 4 is fixedly installed on the top surface of the mounting base 3. A flow display 5 is fixedly installed at the end of the support cylinder 4 away from the mounting base 3. Two probes 101 are fixedly installed inside the measuring tube 1, and one end of one probe 101 extends through the measuring tube 1 to the vortex generator 102.

[0022] When the fluid passes through the measuring tube 1, it flows through the specially designed vortex generator 102, which periodically generates vortices on both sides downstream. The vortex shedding frequency is related to the flow velocity. The vortex shedding causes periodic changes in local flow velocity and pressure. This change is detected by the probe 101 installed after the vortex generator 102 and converted into an electrical signal. After the electrical signal is amplified and filtered, the vortex frequency is calculated by a counter or digital circuit. Finally, the calculated data is displayed by the flow display 5.

[0023] By setting up two probes 101, the problems of small measurement range and poor seismic resistance when only one probe 101 is installed are compensated.

[0024] Two shock-absorbing sleeves 6 are fitted on the outer surface of the measuring tube 1. Airbags 601 are fixedly installed on the inner walls of the two shock-absorbing sleeves 6, and both airbags 601 are in contact with the outer surface of the measuring tube 1. The airbags 601 are made of high-temperature resistant and corrosion-resistant silicone or fluororubber material, and the airbags 601 are filled with inert gas such as nitrogen.

[0025] The airbag 601 absorbs high-frequency vibration energy through elastic deformation, reducing vibration transmission efficiency. Furthermore, the airbag 601 requires no mechanical moving parts, has a long lifespan, and low maintenance costs.

[0026] Pressure sensors 602 are fixedly installed on the outer surfaces of both shock-absorbing sleeves 6. The dielectric material of the pressure sensor 602 is located inside the airbag 601. The pressure of the airbag 601 acts on the dielectric material of the pressure sensor 602, causing a change in the electrode spacing or dielectric constant. The change in capacitance is proportional to the pressure, thus the air pressure of the airbag 601 can be detected. The pressure sensor 602 can monitor the air pressure of the airbag 601 in real time to ensure that the shock-absorbing airbag 601 works within the preset pressure range. An adjusting cylinder 603 is fixedly installed on one side of the outer surface of both shock-absorbing sleeves 6.

[0027] A connecting pipe 604 with a valve is fixedly installed on one side of the outer surface of the regulating cylinder 603. The connecting pipe 604 passes through the shock-absorbing sleeve 6 and is fixedly connected to the air bag 601. Nitrogen gas in the regulating cylinder 603 can be transferred to the air bag 601 through the connecting pipe 604. An air inlet pipe 605 with a one-way valve is fixedly installed on one side of the outer surface of the regulating cylinder 603. Nitrogen gas from the outside can enter the regulating cylinder 603 through the air inlet pipe 605. The one-way valve achieves unidirectional controllable flow of the medium through the coordinated action of the valve disc and the reset mechanism. The one-way valve allows nitrogen gas to enter the regulating cylinder 603 through the air inlet pipe 605, but nitrogen gas cannot be discharged through the air inlet pipe 605.

[0028] A piston 606 is slidably connected inside the regulating cylinder 603. The piston 606 fits tightly inside the regulating cylinder 603, and a sealing ring is provided on the edge of the piston 606. A piston rod 607 is fixedly installed on the middle of one side of the piston 606. When the piston rod 607 moves, it will drive the piston 606 to move. When the user pulls the piston rod 607 backward, it will drive the piston 606 to move towards the tail of the regulating cylinder 603. The external atmospheric pressure will force nitrogen into the cylinder until the desired amount is reached.

[0029] The user pushes the piston rod 607 forward, and the piston 606 moves toward the connecting pipe 604. Nitrogen is squeezed out, so as to transfer external nitrogen to the airbag 601 or extract nitrogen from the airbag 601 to control the air pressure inside the airbag 601.

[0030] A portion of the piston rod 607 is located inside the adjusting cylinder 603, and another portion is located outside the adjusting cylinder 603. A push plate 608 is fixedly installed at the end of the piston rod 607 located outside the adjusting cylinder 603. The user can move the piston rod 607 and the piston 606 by holding and moving the push plate 608.

[0031] Two fastening plates 6011 are fixedly installed on the upper and lower sides of the outer surface of the two shock-absorbing sleeves 6, and each of the four fastening plates 6011 has a through hole on one side. When the two shock-absorbing sleeves 6 are fitted together, the bolts are inserted into the overlapping through holes and nuts are used to assemble the two shock-absorbing sleeves 6.

[0032] Support rods 6012 are fixedly installed on the lower outer surface of both shock absorber sleeves 6, and a fixing rod 6013 is fixedly installed on one side of each support rod 6012. A limiting hole 6014 is opened on the other side of each support rod 6012. The end of the fixing rod 6013 away from the support rod 6012 is rotatably connected to a limiting plate 6015. When the two shock absorber sleeves 6 are in contact, the limiting plate 6015 will pass through the limiting hole 6014. Then, the limiting plate 6015 is rotated so that it does not coincide with the limiting hole 6014, and the limiting plate 6015 cannot be pulled out from the limiting hole 6014. This makes it easy to assemble or disassemble the two shock absorber sleeves 6 for maintenance of the airbag 601.

[0033] The cross-sectional shape of the limiting plate 6015 and the cross-sectional shape of the limiting hole 6014 are both rectangular.

[0034] The working principle of this utility model is as follows: The user places two shock-absorbing sleeves 6 on the outer surface of the measuring tube 1, and the limiting plate 6015 passes through the limiting hole 6014. Then, the limiting plate 6015 is rotated so that it does not coincide with the limiting hole 6014. Then, the bolt is inserted into the through hole after the coincidence, and with the nut, the two shock-absorbing sleeves 6 can be installed on the outer surface of the measuring tube 1. The user pulls the piston rod 607 backward, which drives the piston 606 to move towards the tail of the adjusting cylinder 603. The external atmospheric pressure forces the external nitrogen gas into the adjusting cylinder 603 through the air inlet pipe 605. Then, the user pushes the piston rod 607 forward, and the piston 606 moves towards the connecting pipe 604. The nitrogen gas is squeezed out and enters the air bag 601 through the connecting pipe 604. The air bag 601 will then inflate. The air bag 601 absorbs high-frequency vibration energy through elastic deformation, reduces vibration transmission efficiency, and facilitates vibration resistance of the pipeline.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. Double probe anti-vibration vortex flowmeter, comprising a measuring tube (1), flanges (2) fixedly installed at both ends of the measuring tube (1) and a vortex generator (102) arranged inside the measuring tube (1), characterized in that: The outer top surface of the measuring pipe (1) is fixedly installed with a fixing seat (3), the top surface of the fixing seat (3) is fixedly installed with a supporting cylinder (4), one end of the supporting cylinder (4) away from the fixing seat (3) is fixedly installed with a flow display (5), the outer surface of the measuring pipe (1) is sleeved with two shock-absorbing sleeves (6), the inner walls of the two shock-absorbing sleeves (6) are fixedly installed with air bags (601), the two air bags (601) are in contact with the outer surface of the measuring pipe (1), the outer surfaces of the two shock-absorbing sleeves (6) are fixedly installed with pressure sensors (602), and the outer surfaces of the two shock-absorbing sleeves (6) are fixedly installed with adjusting cylinders (603) on one side.

2. The dual-probe anti-vibration vortex flowmeter of claim 1, wherein: The outer surface of the adjusting cylinder (603) is fixedly installed with a connecting pipe (604) with a valve on one side, and the connecting pipe (604) is fixedly connected with the air bag (601) through the shock-absorbing sleeve (6), and the outer surface of the adjusting cylinder (603) is fixedly installed with an air inlet pipe (605) with a one-way valve on one side.

3. The dual probe anti-vibration vortex flowmeter of claim 2, wherein: The inside of the adjusting cylinder (603) is slidably connected with a piston (606), one side of the piston (606) is fixedly installed with a piston rod (607), part of the piston rod (607) is located in the inside of the adjusting cylinder (603), and the other part is located outside the adjusting cylinder (603), and one end of the piston rod (607) located outside the adjusting cylinder (603) is fixedly installed with a push plate (608).

4. The dual probe anti-vibration vortex flowmeter of claim 1, wherein: The outer surfaces of the two shock-absorbing sleeves (6) are fixedly installed with two fastening plates (6011) on the upper and lower sides, the outer surfaces of the two shock-absorbing sleeves (6) are fixedly installed with supporting rods (6012) on the lower sides, one side of the two supporting rods (6012) is fixedly installed with a fixing rod (6013), the other side of the two supporting rods (6012) is provided with a limiting hole (6014), and one end of the fixing rod (6013) away from the supporting rod (6012) is rotatably connected with a limiting plate (6015).

5. The dual probe anti-vibration vortex flowmeter of claim 1, wherein: The inside of the measuring pipe (1) is fixedly installed with two probes (101), and one end of one of the probes (101) extends through the measuring pipe (1) to the vortex generator (102).

6. The dual probe anti-vibration vortex flowmeter of claim 4, wherein: The cross-sectional shape of the limiting plate (6015) and the limiting hole (6014) are both rectangular.

Images