A Venturi flow meter

Abstract

The utility model discloses a venturi flowmeter, specifically relates to the technical field of venturi flowmeters, including a flow tube, a flowmeter body is provided on the top of the flow tube, a first connecting flange is fixedly provided on both sides of the flow tube, an external connecting tube is fixedly provided on both sides of the flow tube, a second connecting flange is fixedly provided on the side of the external connecting tube close to the flow tube, a fixing mechanism for connecting the external connecting tube to the flow tube is provided on one side of the flow tube, the fixing mechanism includes two limit plates provided on one side of the flow tube, a placement groove is provided inside the limit plate, and a first connecting plate is provided on both sides of the limit plate. The utility model can fix the flow tube and the external connecting tube through the fixing mechanism, thereby extending the service life of the utility model, and can also protect the flowmeter body through the protection mechanism to prevent the flowmeter body from being damaged by collision.

Description

Technical Field

[0001] The utility model relates to the technical field of venturi flowmeters, in particular to a venturi flowmeter. Background Art

[0002] The Venturi flowmeter is a commonly used device for measuring the flow rate in a pressurized pipeline. It is a differential pressure flowmeter and is commonly used to measure the flow rate of fluids such as air, natural gas, coal gas, and water. It consists of three parts: the "contraction section", "throat" and "diffusion section" and is installed in the pipeline where the flow rate needs to be measured.

[0003] For example, a compact venturi flowmeter provided in a Chinese patent application with application number 202220964708.9 includes a flowmeter body and an external pipe, the external pipe is arranged at one end of the flowmeter body, and the two ends of the flowmeter body are respectively fixedly connected with flowmeter connecting flanges, and the end of the external pipe close to the flowmeter body is fixedly connected with the external connecting flange, and mounting holes are provided on the external connecting flange and the flowmeter connecting flange, and protective rings are respectively slidably connected at both ends of the flowmeter body. This technical solution can effectively prevent corrosion and rust caused by external rain and temperature difference, and prevent damage to it by external impurities, thereby ensuring that the overall hardness of the external connecting flange and the flowmeter connecting flange will not be damaged, thereby ensuring safety during use, and making it more convenient and quick to disassemble and repair later.

[0004] However, the following problem still exists in this technical solution: in this technical solution, the thrust is released by the reset spring so that the fixing rod is re-inserted into the interior of the limit groove, connecting the external pipe and the flow meter together. However, as the spring is used for a long time, the elastic potential energy of the spring gradually decreases, resulting in the external pipe and the flow meter being unable to be fixed together. Utility Model Content

[0005] The purpose of the utility model is to provide a Venturi flowmeter, which can fix the flow tube and the external connecting tube through a fixing mechanism to extend the service life of the utility model, and can also protect the flowmeter body through a protective mechanism to avoid damage to the flowmeter body due to collision, so as to solve the above-mentioned deficiencies in the technology.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a venturi flowmeter, including a flow tube, a flowmeter body is provided on the top of the flow tube, a first connecting flange is fixedly provided on both sides of the flow tube, an external connecting tube is provided on both sides of the flow tube, and a second connecting flange is fixedly provided on the side of the external connecting tube close to the flow tube.

[0007] Preferably, one side of the flow tube is provided with a fixing mechanism for connecting the external connecting tube to the flow tube, the fixing mechanism includes two limit plates provided on one side of the flow tube, a placement groove is provided inside the limit plate, and first connecting plates are provided on both sides of the limit plate, a first threaded hole is provided inside the first connecting plate, and the same first bolt is threadedly connected inside the two first threaded holes on the same side. The placement groove is adapted to the first connecting flange and the second connecting flange, and is used to connect the external connecting tube to the flow tube.

[0008] Preferably, a protection mechanism for protecting the flow meter body is provided on the outside of the flow tube, and the protection mechanism includes a protection cover arranged on the outside of the flow tube, fixing plates are fixedly provided at the four corners of the bottom of the protection cover, a second connecting plate is fixedly provided at the bottom of the fixing plate, a second threaded hole is provided on the second connecting plate, and the two second threaded holes on the same side are internally threadedly connected with the same second bolt, the flow meter body is located inside the protection cover, a baffle plate is movably connected to the front side of the protection cover through a hinge, two third connecting plates are fixedly provided on the front side of the baffle plate, a third threaded hole is provided on the third connecting plate, fourth threaded holes are provided on both sides of the protection cover, the third threaded holes and the fourth threaded holes that are connected are internally threadedly connected with the same third bolt, and a handle is fixed on the front side of the baffle plate for protecting the flow meter body.

[0009] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0010] 1. Put the first connecting flange on one side of the flow tube and the second connecting flange on one side of the external connecting tube together, then buckle the two limiting plates on the outside of the first connecting flange and the second connecting flange, the first connecting flange and the second connecting flange are located inside the placement groove of the limiting plate, and then rotate the first bolt to the inside of the first threaded hole, and fix the two limiting plates, so that the flow tube and the external connecting tube can be connected together. Compared with the method of fixing by springs in the prior art, the utility model has a longer service life and higher practicality;

[0011] 2. Put the fixing plate at the bottom of the protective cover on the outside of the flow tube, and the flow meter body on the flow tube is located inside the protective cover. Turn the second bolt and turn the second bolt to the inside of the second threaded hole to fix the protective cover on the flow tube. The utility model can protect the flow meter body through the protective mechanism to prevent the flow meter body from being damaged by collision. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0013] Figure 1 It is a front view of the utility model;

[0014] Figure 2 It is a schematic diagram of the structure in which the external connecting pipe of the utility model is connected to the flow pipe;

[0015] Figure 3 It is a structural schematic diagram of the fixing mechanism of the utility model;

[0016] Figure 4 It is a schematic diagram of the structure in which the protective cover of the utility model is fixed on the flow tube;

[0017] Figure 5 It is a schematic diagram of the structure of the protective cover of the utility model;

[0018] Figure 6 This is a schematic diagram of the structure of the utility model after the shielding plate is opened;

[0019] Figure 7 It is a structural schematic diagram of the protection mechanism of the utility model.

[0020] Description of reference numerals:

[0021] 1 flow tube, 2 flow meter body, 3 external connecting pipe, 4 first connecting flange, 5 second connecting flange;

[0022] 6 fixing mechanism, 601 limiting plate, 602 placement slot, 603 first connecting plate, 604 first threaded hole, 605 first bolt;

[0023] 7 protection mechanism, 701 protection cover, 702 fixing plate, 703 second connecting plate, 704 second threaded hole, 705 second bolt, 706 shielding plate, 707 third connecting plate, 708 third threaded hole, 709 fourth threaded hole, 710 third bolt, 711 handle. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0025] The utility model provides Figure 1-7A venturi flowmeter shown in the figure comprises a flow tube 1, a flow meter body 2 is provided on the top of the flow tube 1, first connecting flanges 4 are fixedly provided on both sides of the flow tube 1, external connecting pipes 3 are provided on both sides of the flow tube 1, and a second connecting flange 5 is fixedly provided on one side of the external connecting pipe 3 close to the flow tube 1;

[0026] like Figure 3 As shown, one side of the flow tube 1 is provided with a fixing mechanism 6 for connecting the external connecting tube 3 with the flow tube 1, and the fixing mechanism 6 includes two limit plates 601 provided on one side of the flow tube 1, and a placement groove 602 is provided inside the limit plate 601, and first connecting plates 603 are provided on both sides of the limit plate 601, and a first threaded hole 604 is provided inside the first connecting plate 603, and the two first threaded holes 604 on the same side are threadedly connected with the same first bolt 605. The placement groove 602 is adapted to the first connecting flange 4 and the second connecting flange 5;

[0027] Put the first connecting flange 4 on one side of the flow tube 1 and the second connecting flange 5 on one side of the external connecting tube 3 together, and then buckle the two limiting plates 601 on the outside of the first connecting flange 4 and the second connecting flange 5. The first connecting flange 4 and the second connecting flange 5 are located inside the placement groove 602 of the limiting plate 601. Then, rotate the first bolt 605, rotate the first bolt 605 to the inside of the first threaded hole 604, and fix the two limiting plates 601. In this way, the flow tube 1 and the external connecting tube 3 can be connected together. Compared with the method of fixing by springs in the comparative document, the utility model has a longer service life.

[0028] like Figure 4 , 5 As shown in , 6 and 7, the flow tube 1 is provided with a protection mechanism 7 for protecting the flow meter body 2 on the outside, and the protection mechanism 7 includes a protection cover 701 provided on the outside of the flow tube 1, and fixing plates 702 are fixedly provided at the four corners of the bottom of the protection cover 701, and a second connecting plate 703 is fixedly provided at the bottom of the fixing plate 702, and a second threaded hole 704 is provided on the second connecting plate 703, and the two second threaded holes 704 located on the same side are internally threadedly connected with the same second bolt 705, and the flow meter body 2 is located inside the protection cover 701, and the front side of the protection cover 701 is movably connected with a shielding plate 706 through a hinge;

[0029] like Figure 4 , 5As shown in FIGS. 6 and 7 , two third connecting plates 707 are fixedly provided on the front side of the shielding plate 706, and a third threaded hole 708 is provided on the third connecting plate 707. Fourth threaded holes 709 are provided on both sides of the protective cover 701. The third threaded holes 708 and the fourth threaded holes 709 that are connected are internally threadedly connected with the same third bolt 710, and a handle 711 is fixedly provided on the front side of the shielding plate 706;

[0030] The fixing plate 702 at the bottom of the protective cover 701 is put on the outside of the flow tube 1, and the flow meter body 2 on the flow tube 1 is located inside the protective cover 701. The second bolt 705 is rotated and the second bolt 705 is rotated into the second threaded hole 704, so that the protective cover 701 can be fixed on the flow tube 1. The utility model can protect the flow meter body 2 through the protective mechanism 7 to prevent the flow meter body 2 from being damaged by collision. When it is necessary to view the data on the flow meter body 2, the third bolt 710 is rotated to turn the third bolt 710 out from the fourth threaded hole 709 and the third threaded hole 708, and then the handle 711 is pulled, and the baffle plate 706 is pulled out from the inside of the protective cover 701, so that people can observe the data on the flow meter body 2 conveniently.

[0031] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A Venturi flowmeter, comprising a flow tube (1), characterized in that: A flow meter body (2) is provided on the top of the flow tube (1), first connecting flanges (4) are fixedly provided on both sides of the flow tube (1), external connecting pipes (3) are provided on both sides of the flow tube (1), and a second connecting flange (5) is fixedly provided on a side of the external connecting pipe (3) close to the flow tube (1); One side of the flow tube (1) is provided with a fixing mechanism (6) for connecting the external connecting tube (3) to the flow tube (1); The fixing mechanism (6) comprises two limit plates (601) arranged on one side of the flow tube (1), a placement groove (602) is provided inside the limit plates (601), first connecting plates (603) are provided on both sides of the limit plates (601), a first threaded hole (604) is provided inside the first connecting plates (603), and the two first threaded holes (604) located on the same side are internally threadedly connected with the same first bolt (605); The flow tube (1) is provided with a protection mechanism (7) outside for protecting the flow meter body (2).

2. A Venturi flowmeter according to claim 1, characterized in that: The placement groove (602) is compatible with the first connecting flange (4) and the second connecting flange (5).

3. A Venturi flowmeter according to claim 1, characterized in that: The protection mechanism (7) comprises a protection cover (701) arranged outside the flow tube (1), and fixing plates (702) are fixedly provided at the four corners of the bottom of the protection cover (701), and a second connecting plate (703) is fixedly provided at the bottom of the fixing plate (702), and a second threaded hole (704) is opened on the second connecting plate (703), and the two second threaded holes (704) located on the same side are internally threadedly connected with the same second bolt (705).

4. A Venturi flowmeter according to claim 3, characterized in that: The flow meter body (2) is located inside the protective cover (701).

5. A Venturi flowmeter according to claim 3, characterized in that: The front side of the protective cover (701) is movably connected to a shielding plate (706) via a hinge, and two third connecting plates (707) are fixedly provided on the front side of the shielding plate (706), and a third threaded hole (708) is provided on the third connecting plate (707). Fourth threaded holes (709) are provided on both sides of the protective cover (701), and the third threaded holes (708) and the fourth threaded holes (709) that are connected are internally threadedly connected with the same third bolt (710).

6. A Venturi flowmeter according to claim 5, characterized in that: A handle (711) is fixedly provided on the front side of the shielding plate (706).

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