A low energy consumption nozzle flow meter

Abstract

The utility model relates to the technical field of flow meters, and discloses a low-energy consumption nozzle flow meter, which solves the problem of poor connection stability of existing nozzle flow meters. The utility model comprises a pressure-bearing pipe, a positioning sleeve is welded inside the pressure-bearing pipe, a nozzle is inserted at one end of the positioning sleeve, and the nozzle, the positioning sleeve and the pressure-bearing pipe are all welded connection structures. A pressure-taking hole 1 and a pressure-taking hole 2 are opened at the top of the pressure-bearing pipe, a pressure-taking tube 1 is arranged at the top of the pressure-taking hole 1, a pressure-taking tube 2 is arranged at the top of the pressure-taking hole 2, and differential pressure sensors are fixedly arranged at the tops of the pressure-taking tubes 1 and 2. Through the nozzle flow meter, the stability of the overall connection can be improved, micro-vibration or cracking can be avoided, and the use effect can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of flow meters, in particular to a low-energy consumption nozzle type flow meter. Background Art

[0002] The measurement principle of the nozzle differential pressure flowmeter: According to the laws of fluid mechanics, when the fluid passes through the nozzle of the pipe, a static pressure difference is generated between the upstream side of the nozzle and the throat or downstream side of the nozzle because the diameters of different parts of the nozzle are different. The flow rate of the fluid is calculated by measuring the static pressure difference and based on factors such as the characteristics of the fluid and the conditions of use of the flowmeter.

[0003] The nozzle and the pressure shell tube of the existing nozzle flowmeter are generally connected by welding or pin connection. The current welding method usually only welds one or two welds at the contact position between the nozzle and the pressure shell tube. When the nozzle used is long, it is difficult to ensure the stability of the welding. The tail of the nozzle is easily squeezed by the fluid for a long time and vibrates, which can easily cause cracks at the welding position, affecting the effect of the flowmeter. Utility Model Content

[0004] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a low-energy consumption nozzle flow meter, which effectively solves the problem of poor connection stability of the existing nozzle flow meter.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a low-energy nozzle flowmeter, comprising a pressure-bearing tube, a positioning sleeve is welded inside the pressure-bearing tube, a nozzle is inserted at one end of the positioning sleeve, the nozzle, the positioning sleeve and the pressure-bearing tube are all welded connection structures, a pressure taking hole 1 and a pressure taking hole 2 are opened at the top of the pressure-bearing tube, a pressure taking tube 1 is arranged at the top of the pressure taking hole 1, a pressure taking tube 2 is arranged at the top of the pressure taking hole 2, and differential pressure sensors are fixedly arranged at the tops of the pressure taking tubes 1 and 2.

[0006] Preferably, a flange plate 1 is fixedly provided at one end of the pressure-bearing pipe, and a flange plate 2 is fixedly provided at the other end of the pressure-bearing pipe.

[0007] Preferably, a chamfered groove is provided on the outer side of the positioning sleeve near one end of the nozzle, a first annular weld is formed between the chamfered groove and the inner wall of the pressure tube, and a second annular weld is formed between the middle position of the outer surface of the positioning sleeve and the inner wall of the pressure tube.

[0008] Preferably, a third annular weld is formed between one end of the nozzle and the inner wall of the pressure pipe, a fourth annular weld is formed between one end of the inner surface of the nozzle and the inner surface of the positioning sleeve, and a plurality of arc welds are formed between the other end of the outer surface of the nozzle and the positioning sleeve.

[0009] Preferably, the positioning sleeve is composed of an annular sleeve body and a plurality of L-shaped limit clamps, the L-shaped limit clamps are fixedly connected to the side of one end of the annular sleeve body, the annular sleeve body and the L-shaped limit clamps are an integrated structure, and an annular groove matching the nozzle is provided at one end of the annular sleeve body away from the L-shaped limit clamps.

[0010] Preferably, a limiting clamp ring matching the annular groove is fixedly provided on one end of the outer surface of the nozzle, the limiting clamp ring and the nozzle are an integrated structure, and the limiting clamp ring is connected to the annular groove by interference fit.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] (1) During operation, by providing the first annular weld, the second annular weld, the third annular weld, the fourth annular weld and the arc weld, the nozzle can be firmly connected to the positioning sleeve and the pressure-bearing pipe, thereby improving the sealing of the connection, thereby improving the measurement accuracy. Since only a small amount of electrical energy is required by the differential pressure sensor during the measurement process, low energy consumption can be achieved in turn;

[0013] (2) By providing a positioning sleeve composed of an annular sleeve body and a plurality of L-shaped limit clamps, the installation stability of the nozzle can be improved. By using an annular groove and a limit clamp ring, the installation stability of the nozzle can be further improved, and the nozzle can be prevented from vibrating or loosening due to fluid pressure, thereby improving the stability and accuracy of the measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0015] In the attached picture:

[0016] Figure 1 This is a schematic diagram of the structure of the low-energy consumption nozzle flow meter of the utility model;

[0017] Figure 2 It is a schematic diagram of the local structure of the low-energy consumption nozzle flow meter of the utility model;

[0018] Figure 3 For this utility model Figure 2 A partial enlarged view of

[0019] Figure 4 This is a schematic diagram of the positioning sleeve structure of the utility model;

[0020] Figure 5 This is a cross-sectional view of the positioning sleeve of the utility model;

[0021] Figure 6 This is a schematic diagram of the nozzle structure of the utility model;

[0022] Figure 7 This is a cross-sectional view of the nozzle of the utility model;

[0023] In the figure: 1. pressure pipe; 2. positioning sleeve; 3. nozzle; 4. pressure hole 1; 5. pressure hole 2; 6. pressure tube 1; 7. pressure tube 2; 8. differential pressure sensor; 9. flange plate 1; 10. flange plate 2; 11. chamfered groove; 12. first annular weld; 13. second annular weld; 14. third annular weld; 15. fourth annular weld; 16. arc weld; 17. annular sleeve; 18. L-shaped limit clamp; 19. annular clamp groove; 20. limit clamp ring. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0025] Depend on Figures 1 to 3 The utility model provides a low-energy consumption nozzle flowmeter, comprising a pressure-bearing pipe 1, a positioning sleeve 2 is welded inside the pressure-bearing pipe 1, a nozzle 3 is inserted at one end of the positioning sleeve 2, the nozzle 3 and the positioning sleeve 2 and the pressure-bearing pipe 1 are all welded connection structures, a pressure-taking hole 1 4 and a pressure-taking hole 2 5 are opened at the top of the pressure-bearing pipe 1, a pressure-taking pipe 1 6 is arranged at the top of the pressure-taking hole 1 4, a pressure-taking pipe 2 7 is arranged at the top of the pressure-taking hole 2 5, a differential pressure sensor 8 is fixedly arranged at the top of the pressure-taking pipe 1 6 and the pressure-taking pipe 2 7, a flange plate 1 9 is fixedly arranged at one end of the pressure-bearing pipe 1, and a flange plate 2 10 is fixedly arranged at the other end of the pressure-bearing pipe 1;

[0026] By welding the nozzle 3 to the positioning sleeve 2 and the pressure-bearing pipe 1, the overall stability and sealing performance can be improved. The pressure-taking hole 1 4 and the pressure-taking hole 2 5 can be connected to the pressure-taking pipe 1 6 and the pressure-taking pipe 2 7 respectively, so that the pressure on the high-pressure side and the low-pressure side can be taken, and the differential pressure can be measured by the differential pressure sensor 8, and then the flow rate can be calculated by the differential pressure. The flange plate 1 9 and the flange plate 2 10 can be fixedly connected to the pipeline. Since the nozzle flowmeter only requires a small amount of electrical energy when in use, the differential pressure sensor 8 can achieve a low energy consumption effect.

[0027] Depend on Figures 1 to 7It is shown that a chamfered groove 11 is formed on the outer side of the positioning sleeve 2 near one end of the nozzle 3, a first annular weld 12 is formed between the chamfered groove 11 and the inner wall of the pressure pipe 1, a second annular weld 13 is formed between the middle position of the outer surface of the positioning sleeve 2 and the inner wall of the pressure pipe 1, a third annular weld 14 is formed between one end of the nozzle 3 and the inner wall of the pressure pipe 1, a fourth annular weld 15 is formed between one end of the inner surface of the nozzle 3 and the inner surface of the positioning sleeve 2, and a plurality of arc welds 16 are formed between the other end of the outer surface of the nozzle 3 and the positioning sleeve 2. The positioning sleeve 2 is composed of an annular sleeve body 17 and a plurality of L-shaped limiting clamping plates 18. The L-shaped limiting clamping plates 18 are fixedly connected to the side of one end of the annular sleeve body 17. The annular sleeve body 17 and the L-shaped limiting clamping plates 18 are an integrated structure. An annular groove 19 matching the nozzle 3 is provided at one end of the annular sleeve body 17 away from the L-shaped limiting clamping plates 18. A limiting clamping ring 20 matching the annular groove 19 is fixedly provided at one end of the outer surface of the nozzle 3. The limiting clamping ring 20 and the nozzle 3 are an integrated structure. The limiting clamping ring 20 is connected to the annular groove 19 by interference fit.

[0028] By setting the first annular weld 12, the second annular weld 13, the third annular weld 14, the fourth annular weld 15 and the arc weld 16, multi-pass sealing welding can be achieved to improve the stability of the installation of the positioning sleeve 2 and the nozzle 3. The L-shaped limiting clamp plate 18 can be used to cover the other end of the nozzle 3 to prevent the nozzle 3 from vibrating due to fluid impact, thereby preventing the nozzle 3 from loosening. By setting the limiting clamp ring 20 and the annular groove 19, the stability of the installation of the nozzle 3 can be further improved.

[0029] During operation, by providing a first annular weld, a second annular weld, a third annular weld, a fourth annular weld and an arc weld, the nozzle can be firmly connected to the positioning sleeve and the pressure pipe, thereby improving the sealing of the connection, and thereby improving the measurement accuracy. Since the differential pressure sensor only requires a small amount of electrical energy during the measurement process, low energy consumption can be achieved in turn; by providing a positioning sleeve composed of an annular sleeve body and a plurality of L-shaped limit clamps, the installation stability of the nozzle can be improved, and by means of annular grooves and limit clamps, the installation stability of the nozzle can be further improved, thereby preventing the nozzle from vibrating or loosening due to fluid pressure, and improving the stability and accuracy of the measurement.

Claims

1. A low energy consumption nozzle flow meter, comprising a pressure pipe (1), characterized in that: A positioning sleeve (2) is welded inside the pressure-bearing pipe (1), a nozzle (3) is inserted into one end of the positioning sleeve (2), and the nozzle (3), the positioning sleeve (2) and the pressure-bearing pipe (1) are all welded connection structures. A pressure-taking hole (4) and a pressure-taking hole (5) are opened at the top of the pressure-bearing pipe (1), a pressure-taking tube (6) is arranged at the top of the pressure-taking hole (4), a pressure-taking tube (7) is arranged at the top of the pressure-taking hole (5), and differential pressure sensors (8) are fixedly arranged at the tops of the pressure-taking tubes (6) and (7).

2. A low energy consumption nozzle flow meter according to claim 1, characterized in that: A flange plate 1 (9) is fixedly provided at one end of the pressure-bearing pipe (1), and a flange plate 2 (10) is fixedly provided at the other end of the pressure-bearing pipe (1).

3. A low energy consumption nozzle flow meter according to claim 1, characterized in that: A chamfered groove (11) is provided on the outer side of the positioning sleeve (2) near one end of the nozzle (3); a first annular weld (12) is formed between the chamfered groove (11) and the inner wall of the pressure-bearing pipe (1); and a second annular weld (13) is formed between the middle position of the outer surface of the positioning sleeve (2) and the inner wall of the pressure-bearing pipe (1).

4. A low energy consumption nozzle flow meter according to claim 1, characterized in that: A third annular weld (14) is formed between one end of the nozzle (3) and the inner wall of the pressure-bearing pipe (1), a fourth annular weld (15) is formed between one end of the inner surface of the nozzle (3) and the inner surface of the positioning sleeve (2), and a plurality of arc-shaped welds (16) are formed between the other end of the outer surface of the nozzle (3) and the positioning sleeve (2).

5. A low energy consumption nozzle flow meter according to claim 1, characterized in that: The positioning sleeve (2) is composed of an annular sleeve body (17) and a plurality of L-shaped limit clamping plates (18). The L-shaped limit clamping plates (18) are fixedly connected to the side of one end of the annular sleeve body (17). The annular sleeve body (17) and the L-shaped limit clamping plates (18) are an integrated structure. An annular clamping groove (19) matching the nozzle (3) is provided at one end of the annular sleeve body (17) away from the L-shaped limit clamping plates (18).

6. A low energy consumption nozzle flow meter according to claim 5, characterized in that: A limiting clamp ring (20) matching the annular clamp groove (19) is fixedly provided at one end of the outer surface of the nozzle (3); the limiting clamp ring (20) and the nozzle (3) are an integrated structure; the limiting clamp ring (20) and the annular clamp groove (19) are connected by interference fit.

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