Anti-blocking metal tube float flowmeter

Abstract

The utility model provides an anti-blocking metal tube float flowmeter, relates to the technical field of auxiliary devices of metal tube float flowmeters, and aims to solve the problems that an existing metal tube float flowmeter is not provided with an anti-blocking auxiliary device structure, so that the flowmeter is prone to local blocking after being used for a long time, the measuring precision of the flowmeter is affected, and the measuring accuracy is affected. The flow meter comprises a measuring pipe, flange plates are installed at the upper end and the lower end of the measuring pipe, a rectangular plate is fixedly connected to the right end of the measuring pipe, a metering box is fixedly connected to the rectangular plate, the metering box is connected with the measuring pipe through a backflow pipe, and a stop valve is installed on the backflow pipe. A rectangular plate is arranged in the measuring box, a conical pipe penetrates through the bottom of the rectangular plate, the conical pipe is communicated with the interior of the measuring box, a frame is movably connected with the interior of a measuring pipe above a flange plate at the lower end, and the measuring pipe is connected with the conical pipe through a conveying pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of auxiliary devices of metal tube float flowmeters, in particular to an anti-clogging metal tube float flowmeter. Background Art

[0002] Metal tube float flowmeters are variable area flow measurement instruments commonly used in industrial automation process control. They feature a compact size, a wide detection range, and ease of use. They can be used to measure the flow of liquids, gases, and steam, and are particularly suitable for measuring low-velocity and low-flow media.

[0003] The main components of a metal float flowmeter include a vertically tapered tube that expands upward from bottom to top and a float that moves freely up and down along the axis of the tube. It also includes a dial or scale and a readout pointer for reading the flow rate. As the measured fluid flows upward through the annular gap formed by the tapered tube and the float, the flow creates a pressure differential between the upper and lower ends of the float. This pressure differential is due to the change in static pressure caused by the change in flow velocity as the fluid passes through the annular gap. According to Bernoulli's equation, as flow velocity increases, static pressure decreases. Therefore, the lower end of the float (where the flow is faster) experiences lower static pressure, while the upper end (where the flow is slower or stagnant) experiences higher static pressure. This pressure differential creates a force that causes the float to rise. As the float rises, the buoyant force on it increases because the volume of fluid displaced by the float increases. Simultaneously, the float is affected by its own weight and fluid resistance. When the buoyant force balances with the weight and fluid resistance, the float stabilizes at a certain height, which reflects the flow rate. The above is a brief description of the working principle of the metal float flowmeter.

[0004] The existing metal tube float flowmeter is not equipped with an anti-clogging auxiliary device structure, which leads to local blockage in the flowmeter after long-term use, affecting the measurement accuracy of the flowmeter and shortening the service life of the flowmeter. Therefore, it is particularly important to design an anti-clogging metal tube float flowmeter to solve the above technical problems. Utility Model Content

[0005] The purpose of the utility model is to solve the problem that the existing metal tube float flowmeter is not provided with an anti-clogging auxiliary device structure, which leads to local blockage in the flowmeter after long-term use, affecting the measurement accuracy of the flowmeter and shortening the service life of the flowmeter. The utility model proposes an anti-clogging metal tube float flowmeter.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solution: a blockage-proof metal tube float flowmeter, comprising a measuring tube, flanges are installed at the upper and lower ends of the measuring tube, the right end of the measuring tube is fixedly connected to a rectangular plate, a metering box is fixedly connected to the rectangular plate, the metering box and the measuring tube are connected by a return pipe, a stop valve is installed on the return pipe, a conical tube is passed through the bottom of the rectangular plate, the conical tube is connected to the interior of the metering box, a frame is movably connected to the inside of the measuring tube above the flange at the lower end, and the measuring tube and the conical tube are connected by a delivery pipe.

[0007] Preferably, the abutting position between the frame and the measuring tube is sealed, and positioning plates are symmetrically mounted on the inner wall of the measuring tube, and the frame is overlapped on the positioning plates.

[0008] Preferably, a sealing block is fixedly connected to the frame, a handle hole is provided on the frame, and a plurality of groups of filter screens are filled on the frame.

[0009] Preferably, a solenoid valve is fixedly connected to the delivery pipe, and the left end of the delivery pipe is a tapered mouth structure.

[0010] Preferably, a display pointer is provided on the meter box.

[0011] Preferably, two air inlet pipes are installed on the top of the metering box, and an anti-back-suction barrier net is fixedly connected to the inner position of the upper end of the measuring tube.

[0012] Compared with the prior art, the advantages and positive effects of the present invention are:

[0013] 1. In the utility model, during use, a frame structure is installed on the inner wall of the lower end of the measuring tube, and multiple groups of filter mesh structures are filled on the frame to perform preliminary filtration on the liquid to be measured entering the measuring tube. The measuring tube and the tapered tube are connected by a delivery pipe, and then an electromagnetic valve structure is installed on the delivery pipe to control the start and stop of the delivery pipe, so that large particles of impurities in the measured liquid entering the metering box are greatly reduced, thereby reducing the probability of clogging the pipeline components in the meter. Compared with the conventional anti-blocking auxiliary device not designed for the flowmeter, the technical solution adopted by the utility model reduces the probability of large particles of impurities in the liquid to be measured clogging the relevant pipeline components of the flowmeter, improves the measurement accuracy, and also prolongs the service life of the flowmeter. The overall structure is compact and can be directly installed on the flowmeter, optimizing the existing working space, and solving the problem that the existing metal tube float flowmeter is not provided with an anti-blocking auxiliary device structure, resulting in local blockage in the flowmeter after long-term use, affecting the measurement accuracy of the flowmeter and shortening the service life of the flowmeter.

[0014] 2. In the present invention, during use, the measuring tube is also equipped with an anti-back-absorption barrier net structure to prevent large particles of impurities in the measuring tube from being back-absorbed into the metering box. The auxiliary pressure supply equipment is connected to the air port pipe to assist in controlling the air pressure inside the metering box to be in a relatively stable state. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is an overall diagram of the anti-clogging metal tube float flowmeter of the utility model;

[0016] Legend: 1. Measuring tube; 101. Flange; 102. Rectangular plate; 2. Measuring box; 201. Return pipe; 202. Stop valve; 3. Conical tube; 4. Frame; 401. Delivery pipe; 402. Positioning plate; 403. Sealing block; 404. Handle hole; 405. Filter; 406. Solenoid valve; 5. Display pointer; 6. Air port connecting pipe; 7. Anti-backflow barrier net. DETAILED DESCRIPTION

[0017] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0018] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0019] The utility model provides an anti-clogging metal tube float flowmeter, comprising a measuring tube 1, wherein flanges 101 are installed at the upper and lower ends of the measuring tube 1, the right end of the measuring tube 1 is fixedly connected to a rectangular plate 102, a metering box 2 is fixedly connected to the rectangular plate 102, the metering box 2 and the measuring tube 1 are connected through a return pipe 201, a stop valve 202 is installed on the return pipe 201, a tapered tube 3 is passed through the bottom of the rectangular plate 102, the tapered tube 3 is connected to the interior of the metering box 2, a frame 4 is movably connected to the interior of the measuring tube 1 above the flange 101 at the lower end, the measuring tube 1 and the tapered tube 3 are connected through a delivery pipe 401, the abutment position of the frame 4 and the measuring tube 1 is sealed, a positioning plate 402 is symmetrically installed on the inner wall of the measuring tube 1, the frame 4 is overlapped on the positioning plate 402, a display pointer 5 is provided on the metering box 2,

[0020] When the anti-clogging metal tube float flowmeter is actually used, the measuring tube 1 and the metering assembly are installed on the pipe to be measured. The liquid to be measured enters the measuring tube 1 position from the flange 101 at the lower end. First, the multiple groups of filter screens 405 on the frame 4 filter the liquid to be measured. The liquid to be measured entering the measuring tube 1 is filtered to prevent large particles of impurities from clogging the flow metering assembly. Then the solenoid valve 406 is controlled to open, and the delivery pipe 401 delivers the filtered liquid to the position of the tapered tube 3, and then the tapered tube 3 delivers it to the position of the metering box 2. At the position, the auxiliary component for flow metering in the metering box 2 measures the liquid to be tested transported at the position of the tapered tube 3, and finally the display pointer 5 shows the flow rate inside the measured pipeline. After the test is completed, the staff manually closes the solenoid valve 406, and then manually opens the stop valve 202, so that the measured liquid in the metering box 2 flows back into the measuring tube 1, and the flange 101 at the lower end of the measuring tube 1 stops delivering liquid, and the liquid in the metering box 2 flows back into the measuring tube 1. The measuring tube 1 is also equipped with an anti-back suction barrier net 7 structure to prevent the liquid in the measuring tube 1 from being sucked back. Large particles of impurities are sucked back into the metering box 2. At the same time, two air port pipes 6 structures are installed on the top of the metering box 2. The auxiliary pressure supply equipment is connected to the air port pipe 6 to assist in controlling the air pressure inside the metering box 2 to be in a relatively stable state. A frame 4 structure is installed on the inner wall of the lower end of the measuring tube 1, and multiple groups of filter mesh 405 structures are filled on the frame 4 to perform preliminary filtration on the liquid to be measured entering the measuring tube 1. The measuring tube 1 and the tapered tube 3 are connected by a delivery pipe 401, and a solenoid valve 406 structure is installed on the delivery pipe 401 to control the start and stop of the delivery pipe 401, so that the large particles of impurities in the measured liquid entering the metering box 2 are greatly reduced, thereby reducing the probability of clogging the pipeline components in the meter. Compared with the conventional anti-blocking auxiliary device not designed for the flow meter, the technical solution adopted by the utility model reduces the probability of clogging the flow meter-related pipeline components due to large particles of impurities in the liquid to be measured, improves the measurement accuracy, and also extends the service life of the flow meter. The overall structure is compact and can be directly installed on the flow meter to optimize the existing working space.

[0021] like Figure 1 As shown, a sealing block 403 is fixedly connected to the frame 4, a handle hole 404 is provided on the frame 4, and multiple groups of filter screens 405 are filled on the frame 4. A solenoid valve 406 is fixedly connected to the delivery pipe 401. The left end of the delivery pipe 401 has a tapered mouth structure. Two air port pipes 6 are installed on the top of the metering box 2. An anti-backflow barrier net 7 is fixedly connected to the inner position of the upper end of the measuring tube 1.

[0022] The effect achieved by the entire embodiment 1 is that, during use, the measuring tube 1 is also installed with an anti-back-absorption barrier net 7 structure to prevent large particles of impurities in the measuring tube 1 from being back-absorbed into the metering box 2, and the auxiliary pressure supply equipment is connected to the air port pipe 6 to assist in controlling the air pressure inside the metering box 2 to be in a relatively stable state.

[0023] Working principle: The measuring tube and metering components are installed on the pipe to be measured. The liquid to be measured enters the measuring tube through the flange at the lower end. First, the liquid to be measured is filtered by multiple groups of filters on the frame. The liquid to be measured entering the measuring tube is filtered to prevent large particles from clogging the flow metering components. Then the solenoid valve is controlled to open, and the delivery pipe delivers the filtered liquid to the tapered tube. The tapered tube then delivers it to the metering box. The auxiliary components for flow metering in the metering box measure the liquid to be measured at the tapered tube, and finally the display shows the flow rate. The pointer displays the flow rate inside the measured pipeline. After the test is completed, the staff manually closes the solenoid valve and then manually opens the stop valve to allow the measured liquid in the metering box to flow back into the measuring tube. The liquid delivery is stopped at the flange position at the lower end of the measuring tube, and the liquid in the metering box flows back into the measuring tube. The measuring tube is also equipped with an anti-backflow barrier net structure to prevent large particles of impurities in the measuring tube from being backflowed into the metering box. At the same time, two air port pipe structures are installed on the top of the metering box, and the auxiliary pressure supply equipment is connected to the air port pipe to assist in controlling the air pressure inside the metering box to be in a relatively stable state.

Claims

1. A metal tube float flowmeter with an anti-clogging function, comprising a measuring tube (1), wherein flanges (101) are installed at the upper and lower ends of the measuring tube (1), characterized in that: The right end of the measuring tube (1) is fixedly connected to a rectangular plate (102), and a metering box (2) is fixedly connected to the rectangular plate (102). The metering box (2) and the measuring tube (1) are connected via a return pipe (201), and a stop valve (202) is installed on the return pipe (201). A conical tube (3) is passed through the bottom of the rectangular plate (102), and the conical tube (3) is connected to the inside of the metering box (2). A frame (4) is movably connected to the inside of the measuring tube (1) above the flange (101) at the lower end, and the measuring tube (1) and the conical tube (3) are connected via a delivery pipe (401).

2. The anti-clogging metal tube float flowmeter according to claim 1, characterized in that: The abutting position between the frame (4) and the measuring tube (1) is sealed, a positioning plate (402) is symmetrically mounted on the inner wall of the measuring tube (1), and the frame (4) is overlapped on the positioning plate (402).

3. The anti-clogging metal tube float flowmeter according to claim 1, characterized in that: A sealing block (403) is fixedly connected to the frame (4), a handle hole (404) is provided on the frame (4), and a plurality of groups of filter screens (405) are filled on the frame (4).

4. The anti-clogging metal tube float flowmeter according to claim 1, characterized in that: The delivery pipe (401) is fixedly connected to a solenoid valve (406), and the left end of the delivery pipe (401) is a tapered mouth structure.

5. The anti-clogging metal tube float flowmeter according to claim 1, characterized in that: The metering box (2) is provided with a display pointer (5).

6. The anti-clogging metal tube float flowmeter according to claim 1, characterized in that: Two air inlet pipes (6) are installed on the top of the metering box (2), and an anti-back-suction barrier net (7) is fixedly connected to the inner position of the upper end of the measuring tube (1).

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