Flow measuring device based on long-diameter nozzle

Abstract

The utility model relates to the technical field of long-diameter nozzle flow measuring devices, and discloses a long-diameter nozzle flow measuring device which comprises a measuring tube, one end of the measuring tube is fixedly connected with a connecting ring, a containing groove is formed in the connecting ring, a connecting bolt penetrates through the surface of the connecting ring, and the connecting bolt is fixedly connected with the measuring tube. An expansion mechanism is arranged in the containing groove, a fixing ring is fixedly connected to the inner wall of the measuring pipe, and a long-neck nozzle is connected to one side of the fixing ring in a contact mode. According to the flow measuring device based on the long-diameter nozzle, the caliber of an outlet of the nozzle can be conveniently adjusted by arranging the flow limiting piece and the fastening shell, so that various measuring requirements are met, meanwhile, the expanding mechanism is arranged so that the measuring device can select a fixing mode according to conditions when facing pipelines with different pressure intensities, and the device is not prone to loosening; therefore, the measuring process is more stable and higher in safety, and meanwhile, the expansion mechanism can be stored, so that the device is convenient to carry.

Description

Technical Field

[0001] The utility model relates to the technical field of long-radius nozzle flow measurement devices, in particular to a long-radius nozzle-based flow measurement device. Background Technique

[0002] In industries such as petroleum, chemical engineering, and electric power, precise measurement of various fluids is required during the production process. The long-radius nozzle flow measurement device, with its high precision, stability, and reliability, meets the requirements of these industries for fluid measurement. Its measurement principle is based on the throttling principle of fluid mechanics, and the flow rate is deduced by measuring the pressure difference generated by the fluid at the nozzle. It has advantages such as a large measurement range and high measurement accuracy.

[0003] After consulting the relevant patent document CN218628450U, there are still some problems with the existing long-radius nozzle-based flow measurement device. The current optimization solutions on the market mainly include: "comprising a measuring pipe and a long-radius nozzle body, the long-radius nozzle body is installed inside the measuring pipe, a pair of pressure-taking pipes are arranged on the measuring pipe, the connection point between the long-radius nozzle body and the measuring pipe is located between the pair of pressure-taking pipes, internal threads are provided inside the measuring pipe, external threads matching the internal threads are provided on the long-radius nozzle body, the long-radius nozzle body is threadedly connected inside the measuring pipe, and an internal regular polygon frame is provided on the inner wall of the long-radius nozzle body, which can conveniently and quickly install the long-radius nozzle body on the inner wall of the measuring pipe, with simple installation and disassembly, convenient for maintenance, and high stability". However, the diameter at the nozzle outlet of this kind of measuring device is relatively fixed. When the fluid flow rate is very slow, inaccurate measurement results will occur due to insufficient fluid pressure. Usually, it is necessary to replace the nozzle with a smaller diameter opening, resulting in high measurement costs. To address the above problems, by setting a flow-limiting piece and a fastening shell, the diameter of the nozzle outlet can be conveniently adjusted to meet various measurement requirements. At the same time, an expansion mechanism is set so that the measuring device can choose a fixed method according to the situation when facing pipes with different pressures, preventing the device from loosening easily, making its measurement process more stable and safer. At the same time, the expansion mechanism can be retracted, making the device convenient to carry. Summary of the Utility Model

[0004] To solve the above technical problems, the utility model provides a long-radius nozzle-based flow measurement device.

[0005] To achieve the above object, the present utility model provides the following technical solutions: A flow measurement device based on a long nozzle, comprising a measuring tube, one end of the measuring tube is fixedly connected with a connecting ring, a receiving groove is formed inside the connecting ring, a connecting bolt penetrates through the surface of the connecting ring, an expansion mechanism is arranged inside the receiving groove, a fixing ring is fixedly connected to the inner wall of the measuring tube, one side of the fixing ring is in contact connection with a long nozzle, one end of the long nozzle is in contact connection with a flow limiting plate, and a fastening shell is sleeved on the surface of the flow limiting plate.

[0006] As a further improvement of the above solution, the connecting bolt is rotatably connected to the inside of the connecting ring, the connecting bolts are symmetrically distributed around the connecting ring as the axis, the expansion mechanism is symmetrically distributed around the connecting ring as the axis, and the connecting lines between the two groups of connecting bolts and the two groups of expansion mechanisms are perpendicular to each other.

[0007] As a further improvement of the above solution, the long nozzle includes a mounting base, the mounting base is in contact connection with the side wall of the fixing ring and is connected to each other through fixing bolts, and the mounting base is slidably connected to the inner wall of the measuring tube.

[0008] As a further improvement of the above solution, a convex ring is fixedly connected to one end of the long nozzle away from the mounting base, the diameter of the convex ring is smaller than the diameter of the mounting base, and a filtering fence is fixedly connected to the inner wall of the mounting base.

[0009] As a further improvement of the above solution, the flow limiting plate is made of rubber material, the flow limiting plate is in contact connection with the convex ring, a fixing pin penetrates through one side of the fastening shell, the fixing pin is slidably connected to the side wall of the fastening shell, and the fixing pins are symmetrically distributed around the fastening shell as the axis.

[0010] As a further improvement of the above solution, a retaining ring is fixedly connected to one side of the fastening shell, the retaining ring is in contact connection with the surface of the flow limiting plate, one side of the fastening shell opposite to the retaining ring is buckled with the convex ring, the fastening shell is semi-circular, and the fastening shell is a total of two groups to form a whole.

[0011] As a further improvement of the above solution, the expansion mechanism includes an expansion block. Mounting holes are formed on the surface of the expansion block, and the mounting holes are symmetrically distributed with the expansion block as the axis. A sliding groove is formed inside the expansion block, and a limiting rod is slidably connected inside the sliding groove. One end of the limiting rod is fixedly connected to a support block, and the other end of the limiting rod away from the support block is fixedly connected in a storage groove. A return spring is fixedly connected to the surface of the support block, and the return spring generates a pulling force towards the middle to pull the expansion block into the storage groove. The other end of the return spring is fixedly connected to the inner wall of the expansion block. A limiting block is fixedly connected at the outlet of the sliding groove, and the diameter of the limiting block is the same as that of the support block.

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

[0013] 1. For this long diameter nozzle flow measurement device, by setting a current limiting piece and a fastening shell, the caliber at the outlet of the nozzle can be conveniently adjusted to meet various measurement requirements. At the same time, an expansion mechanism is set so that the measurement device can choose a fixed method according to the situation when facing pipelines with different pressures, making the device not easily loose, thus making its measurement process more stable and safer. At the same time, the expansion mechanism can be stored, making the device convenient to carry.

[0014] 2. For this long diameter nozzle flow measurement device, the device usually needs to be installed at the connection of the fluid pipeline during measurement. However, under normal pressure pipelines, usually only two groups of connection bolts need to be fixed to achieve the fixation of the device, reducing the installation time. However, when measuring pipelines with relatively large pressure or strong pressure, it is easy for the device to become loose by fixing with two groups of connection bolts. At this time, in order to improve the connection stability between the device and the pipeline, first pull the expansion block outwards so that the mounting hole is exposed from the storage groove, and then complete the fixation of the measuring pipe by matching the bolt with the mounting hole, improving the stability and safety of the device during measurement. Under the action of the return spring, the expansion block is reset to the inside of the storage groove, not occupying the space on the surface of the connection ring, making the device more convenient during the carrying process; when the flow rate in the fluid pipeline is very slow, at this time, the outlet of the long neck nozzle cannot be completely covered by the fluid, which will cause insufficient fluid pressure and inaccurate measurement results. At this time, pull out the fixed pin and remove the fastening shell, replace the current limiting piece with a smaller caliber model, then fix the current limiting piece to the convex ring again, and then connect the two groups of fastening shells. In this way, it is convenient to adjust the outlet caliber of the long neck nozzle, improving the measurement accuracy in the case of slow flow rate, and also avoiding damage to the long neck nozzle caused by frequent disassembly of the long neck nozzle. At the same time, the setting of the filter fence can block large foreign objects that may appear in the fluid without affecting the measurement results, avoiding damage to the long neck nozzle and improving its service life. Description of the Drawings

[0015] Figure 1 This is the front view of the present utility model;

[0016] Figure 2 This is the schematic internal sectional view of the present utility model;

[0017] Figure 3 This is the right-side explosion schematic diagram of the long-neck nozzle and the flow-limiting piece of the present utility model;

[0018] Figure 4 This is the left-side explosion schematic diagram of the long-neck nozzle and the flow-limiting piece of the present utility model;

[0019] Figure 5 This is the structural schematic diagram of the expansion mechanism of the present utility model.

[0020] Main symbol description:

[0021] 1. Measuring tube; 2. Connecting ring; 3. Receiving groove; 4. Connecting bolt; 5. Expansion mechanism; 501. Mounting hole; 502. Sliding groove; 503. Limiting rod; 504. Support block; 505. Return spring; 506. Limiting block; 507. Expansion block; 6. Fixed ring; 7. Long-neck nozzle; 701. Mounting base; 702. Convex ring; 703. Filter fence; 8. Flow-limiting piece; 9. Fastening shell; 901. Fixed pin; 902. Retaining ring. Specific implementation manner

[0022] Next, in combination with the accompanying drawings and specific implementation manners, the present utility model will be further described. It should be noted that on the premise of no conflict, the following-described embodiments or technical features can be arbitrarily combined with each other to form new embodiments.

[0023] Embodiment:

[0024] Please refer to Figures 1-5 , A flow measurement device based on a long-diameter nozzle in this embodiment includes a measuring tube 1. One end of the measuring tube 1 is fixedly connected with a connecting ring 2. An accommodating groove 3 is opened inside the connecting ring 2. A connecting bolt 4 penetrates through the surface of the connecting ring 2. An expansion mechanism 5 is arranged inside the accommodating groove 3. A fixed ring 6 is fixedly connected to the inner wall of the measuring tube 1. One side of the fixed ring 6 is in contact connection with a long-neck nozzle 7. One end of the long-neck nozzle 7 is in contact connection with a flow-limiting piece 8. A fastening shell 9 is sleeved on the surface of the flow-limiting piece 8.

[0025] The connecting bolt 4 is rotatably connected to the inside of the connecting ring 2. The connecting bolts 4 are symmetrically distributed with the connecting ring 2 as the axis. The expansion mechanisms 5 are symmetrically distributed with the connecting ring 2 as the axis. The connecting lines between the two groups of connecting bolts 4 and the two groups of expansion mechanisms 5 are perpendicular to each other.

[0026] The long-neck nozzle 7 includes a mounting base 701. The mounting base 701 is in contact connection with the side wall of the fixed ring 6 and is interconnected by fixing bolts. The mounting base 701 is slidably connected to the inner wall of the measuring tube 1.

[0027] One end of the long-neck nozzle 7 away from the mounting base 701 is fixedly connected with a convex ring 702. The diameter of the convex ring 702 is smaller than that of the mounting base 701. A filter fence 703 is fixedly connected to the inner wall of the mounting base 701.

[0028] The flow-limiting sheet 8 is made of rubber. The flow-limiting sheet 8 is in contact connection with the convex ring 702. One side of the fastening shell 9 is penetrated by a fixed pin 901. The fixed pin 901 is slidably connected to the side wall of the fastening shell 9. The fixed pins 901 are symmetrically distributed with the fastening shell 9 as the axis.

[0029] One side of the fastening shell 9 is fixedly connected with a retaining ring 902. The retaining ring 902 is in contact with the surface of the flow-limiting sheet 8. The side of the fastening shell 9 opposite to the retaining ring 902 is buckled with the convex ring 702. The fastening shell 9 is semi-circular, and there are two groups of the fastening shells 9 forming a whole.

[0030] The expansion mechanism 5 includes an expansion block 507. Mounting holes 501 are formed on the surface of the expansion block 507. The mounting holes 501 are symmetrically distributed with the expansion block 507 as the axis. A sliding groove 502 is formed inside the expansion block 507. A limiting rod 503 is slidably connected inside the sliding groove 502. One end of the limiting rod 503 is fixedly connected with a support block 504. The other end of the limiting rod 503 away from the support block 504 is fixedly connected in the storage groove 3. A return spring 505 is fixedly connected to the surface of the support block 504. The return spring 505 generates a pulling force towards the middle to pull the expansion block 507 into the storage groove 3. The other end of the return spring 505 is fixedly connected to the inner wall of the expansion block 507. A limiting block 506 is fixedly connected at the outlet of the sliding groove 502. The diameter of the limiting block 506 is the same as that of the support block 504.

[0031] In an embodiment of the present application, the working principle of a flow measurement device based on a long-diameter nozzle is as follows: When measuring, the device usually needs to be installed at the connection of the fluid pipeline. However, under normal pressure pipelines, usually only two sets of connecting bolts 4 need to be fixed to achieve the fixation of the device, reducing the installation time. However, when measuring pipelines with relatively large pressure or strong pressure, fixing with two sets of connecting bolts 4 is likely to cause the device to loosen. At this time, in order to improve the connection stability between the device and the pipeline, first, the expansion block 507 is pulled outwards, so that the installation hole 501 is exposed from the receiving groove 3. Then, the measuring tube 1 is fixed by cooperating with the installation hole 501 through bolts, improving the stability and safety of the device during measurement. During the process of pulling out the installation hole 501, the return spring 505 will be stretched. When the measurement is completed, after disassembling the measuring tube 1, since the installation hole 501 is released from the fixation with the bolt, under the action of the return spring 505, the expansion block 507 is reset to the inside of the receiving groove 3, not occupying the space on the surface of the connecting ring 2, making the device more convenient to carry; When the flow rate in the fluid pipeline is very slow, at this time, the outlet of the long-neck nozzle 7 cannot be completely covered by the fluid, which will cause insufficient fluid pressure and inaccurate measurement results. At this time, the fixing pin 901 is pulled out and the fastening shell 9 is removed, the flow-limiting piece 8 is replaced with a smaller-caliber model, then the flow-limiting piece 8 is fixed to the convex ring 702 again, and the two sets of fastening shells 9 are connected. In this way, it is convenient to adjust the outlet diameter of the long-neck nozzle 7, improving the measurement accuracy in the case of slow flow rate, and also avoiding damage to the long-neck nozzle 7 caused by frequent disassembly of the long-neck nozzle 7. At the same time, the setting of the filter fence 703 can block large foreign objects that may appear in the fluid without affecting the measurement results, avoiding damage to the long-neck nozzle 7 and improving its service life.

[0032] The above embodiments are only the preferred embodiments of the present invention, and cannot be used to limit the scope of protection of the present invention. Any non-substantive changes and substitutions made by those skilled in the art based on the present invention belong to the scope of protection required by the present invention.

Claims

1. A flow measurement device based on a long diameter nozzle, characterized in that: The measuring tube (1) comprises a measuring tube (1), one end of which is fixedly connected to a connecting ring (2), a receiving groove (3) is provided inside the connecting ring (2), a connecting bolt (4) is passed through the surface of the connecting ring (2), an expansion mechanism (5) is provided inside the receiving groove (3), a fixing ring (6) is fixedly connected to the inner wall of the measuring tube (1), one side of the fixing ring (6) is contact-connected to a long-neck nozzle (7), one end of the long-neck nozzle (7) is contact-connected to a limiting flow plate (8), and a fastening shell (9) is sleeved on the surface of the limiting flow plate (8).

2. A flow measurement device based on a long diameter nozzle as claimed in claim 1, characterized in that: The connecting bolts (4) are rotatably connected to the inside of the connecting ring (2); the connecting bolts (4) are symmetrically distributed with the connecting ring (2) as the axis; the expansion mechanism (5) is symmetrically distributed with the connecting ring (2) as the axis; and the connection line between the connecting bolts (4) and the expansion mechanism (5) is perpendicular to each other.

3. A flow measurement device based on a long-diameter nozzle as claimed in claim 1, characterized in that: The long-neck nozzle (7) comprises a mounting base (701), the mounting base (701) is in contact with and connected to the side wall of the fixing ring (6), and are connected to each other via fixing bolts, and the mounting base (701) is slidably connected to the inner wall of the measuring tube (1).

4. A flow measurement device based on a long-diameter nozzle as claimed in claim 3, characterized in that: A convex ring (702) is fixedly connected to one end of the long-neck nozzle (7) away from the mounting base (701); the diameter of the convex ring (702) is smaller than the diameter of the mounting base (701); and a filtering fence (703) is fixedly connected to the inner wall of the mounting base (701).

5. A flow measurement device based on a long-diameter nozzle as claimed in claim 4, characterized in that: The current limiting sheet (8) is made of rubber, the current limiting sheet (8) is in contact with and connected to the convex ring (702), a fixing pin (901) penetrates one side of the fastening shell (9), the fixing pin (901) is slidably connected to the side wall of the fastening shell (9), and the fixing pin (901) is symmetrically distributed with the fastening shell (9) as the axis.

6. A flow measurement device based on a long diameter nozzle as claimed in claim 5, characterized in that: A retaining ring (902) is fixedly connected to one side of the fastening shell (9); the retaining ring (902) is in contact with the surface of the current limiting plate (8); a side of the fastening shell (9) opposite to the retaining ring (902) is buckled with the convex ring (702); the fastening shell (9) is semicircular; and the fastening shell (9) consists of two groups formed into a whole.

7. A flow measurement device based on a long diameter nozzle as claimed in claim 1, characterized in that: The expansion mechanism (5) comprises an expansion block (507), a surface of the expansion block (507) is provided with mounting holes (501), the mounting holes (501) are symmetrically distributed with the expansion block (507) as the axis, a sliding groove (502) is provided inside the expansion block (507), the interior of the sliding groove (502) is slidably connected to a limiting rod (503), one end of the limiting rod (503) is fixedly connected to a support block (504), and one end of the limiting rod (503) is away from the support block (504). The end of the support block (504) is fixedly connected in the receiving groove (3); a return spring (505) is fixedly connected to the surface of the support block (504); the return spring (505) generates a pulling force toward the middle to pull the expansion block (507) into the receiving groove (3); the other end of the return spring (505) is fixedly connected to the inner wall of the expansion block (507); a limit block (506) is fixedly connected at the outlet of the sliding groove (502); and the diameter of the limit block (506) is the same as that of the support block (504).

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