CN220251091U

CN220251091U - Differential pressure flowmeter

Info

Publication number: CN220251091U
Application number: CN202321765081.5U
Authority: CN
Inventors: 伍正辉; 侯飞; 陈明
Original assignee: SHANGHAI ZHAOHUI PRESSURE APPARATUS CO Ltd
Current assignee: SHANGHAI ZHAOHUI PRESSURE APPARATUS CO Ltd
Priority date: 2023-07-06
Filing date: 2023-07-06
Publication date: 2023-12-26
Anticipated expiration: 2033-07-06

Abstract

The utility model discloses a differential pressure flowmeter, which relates to the technical field of flowmeters and comprises a flowmeter body, wherein a probe seat is arranged at the top of the flowmeter body, two probes and a platinum resistor are arranged in the probe seat, a retainer ring is arranged at the bottom end of the probe, a diaphragm is fixedly connected between the retainer ring and the probes, a first O-shaped ring is arranged between the inner wall of the probe seat and the probes, a diffusion silicon base is arranged in the probe seat, a second O-shaped ring is arranged on a step of the diffusion silicon base, a third O-shaped ring is arranged between the probe seat and the flowmeter body, a shell is arranged at the top of the probe seat, a fourth O-shaped ring is arranged between the top of the probe seat and the shell, an inclined gauge head is arranged at the top of the shell, and a fifth O-shaped ring is arranged between the inclined gauge head and the shell. The differential pressure flowmeter has high dustproof and waterproof capability, can prevent dust or water mist from entering the product to affect the stability of the circuit, ensures long-term stable and reliable operation of the product, and prolongs the service life of the product.

Description

Differential pressure flowmeter

Technical Field

The utility model relates to the technical field of flowmeters, in particular to a differential pressure flowmeter.

Background

The differential pressure flowmeter is an intelligent digital display flow pressure measurement and control product integrating instantaneous flow, accumulated flow, differential pressure, temperature, display, output and control, an output signal is processed by a microprocessor with high precision, high speed and low time delay, the relation between the flow and the differential pressure is calculated through calibration, the generated flow can be calculated through the differential pressure, the signal subjected to operation processing is remotely monitored and controlled, the system flow is measured and controlled, the tightness of the differential pressure flowmeter is not ideal in the prior art, dust and water mist enter the stability of an internal influence circuit easily, and therefore the service life is not ideal.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides the differential pressure flowmeter, and solves the problems that the sealing performance of the differential pressure flowmeter is not ideal enough, dust and water mist easily enter into the interior to influence the stability of a circuit, and the service life is not ideal enough.

In order to achieve the above purpose, the utility model is realized by the following technical scheme: the differential pressure flowmeter comprises a flowmeter body, flowmeter body top is equipped with the probe seat, the inside two probes and the platinum resistance of being equipped with of probe seat, the probe bottom is equipped with the retaining ring, fixedly connected with diaphragm between retaining ring and the probe, be equipped with first O shape circle between probe seat inner wall and the probe, the inside diffusion silicon base that is equipped with of probe seat, be equipped with the second O shape circle on the step of diffusion silicon base, be equipped with the third O shape circle between probe seat and the flowmeter body, probe seat top is equipped with the shell, be equipped with the fourth O shape circle between probe seat top and the shell, the shell top is equipped with the meter head that inclines, be equipped with the fifth O shape circle between meter head and the shell to one side is equipped with the sixth O shape circle in the flowmeter body.

Preferably, the retainer ring and the probe are welded along the circumference of the gap through argon arc welding equipment, and the probe seat are welded along the circumference of the end face gap through argon arc welding equipment.

Preferably, the probe seat is fixedly connected with the flowmeter body through an inner hexagonal cylindrical head screw, and the shell is fixedly connected with the probe seat through an inner hexagonal cone end set screw.

Preferably, the diffusion silicon base is provided with a diffusion silicon core body, and the diffusion silicon core body is internally provided with an oil filling hole.

Preferably, a compensating plate is welded on the contact pin of the diffusion silicon base, an adapter plate is inserted on the compensating plate, an amplifying circuit is welded on the adapter plate, and the amplifying circuit is welded with an outgoing line of the platinum resistor.

Preferably, the display circuit board is fixedly connected to the inclined gauge outfit through a tapping screw, the gauge outfit connecting seat is rotationally connected to the shell, the gauge outfit connecting seat is connected with the inclined gauge outfit in a clamping mode through a notch, the plug-in mounting seat is welded to the shell, the four-core plug-in is installed on the plug-in mounting seat, the silica gel wire is welded to the end portion of the four-core plug-in, and the silica gel wire is welded to the amplifying circuit.

Preferably, the amplifying circuit is connected with the display circuit board through a flexible wire, and the shell is welded with a cylindrical pin.

Advantageous effects

The utility model provides a differential pressure flow meter. Compared with the prior art, the method has the following beneficial effects:

1. the differential pressure flowmeter gauge outfit adopts rotatable display gauge outfit structural design, has 320 rotation function, can observe the display screen by different angles.

2. The differential pressure flowmeter display screen adopts the design of inclination angle, so that eyes can be better protected by being parallel to the display screen in terms of ergonomics.

3. The differential pressure flowmeter display circuit adopts a backlight display screen, can ensure that data is observed under weak light, and has stronger adaptability.

4. The differential pressure flowmeter display screen button adopts the capacitive touch design, and the purpose is to reach the waterproof effect.

5. The differential pressure flowmeter has high dustproof and waterproof capacity, the protection level can reach IP66, dust or water mist can be prevented from entering the product to influence the stability of the circuit, long-term stable and reliable operation of the product is ensured, and the service life of the product is prolonged.

6. The differential pressure flowmeter adopts a thermocouple temperature sensor, and can monitor the environmental temperature change condition of the medium in real time.

7. The differential pressure flowmeter is made of 316L stainless steel, so that the differential pressure flowmeter is corrosion-resistant and can meet the requirements of the industry with high sanitary standards.

8. The differential pressure flowmeter adopts a nozzle structure, so that pressure difference is generated between the front probe end and the rear probe end, and the real-time flow can be calculated.

9. The differential pressure flowmeter adopts a silicone oil filling technology, and the silicone oil has excellent heat resistance, electrical insulation, weather resistance, hydrophobicity, physiological inertia, small surface tension, low viscosity-temperature coefficient, high compression resistance, radiation resistance and the like.

10. The differential pressure flowmeter adopts a corrugated diaphragm with the thickness of 0.05mm as a pressure sensing element, and the diaphragm is a circular membranous elastic sensing element and has super-strong pressure sensing capability and elastic capability.

11. The adoption of the imported high-precision diffusion silicon core body can improve the measurement precision to 0.1% F.S.

12. The shell is welded with a cylindrical pin, so that the inclined gauge outfit is prevented from rotating 360 degrees to cause the line to be twisted off, and the inclined gauge outfit can only rotate 320 degrees.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic side view of the present utility model;

fig. 3 is a schematic top view of the present utility model.

In the figure: 1. a flowmeter body; 2. a probe seat; 3. a retainer ring; 4. a membrane; 5. a probe; 6. the inner hexagonal cone end is tightly fixed with a screw; 7. diffusing the silicon core; 8. a diffused silicon base; 9. a platinum resistance; 10. a fourth O-ring; 11. a second O-ring; 12. a first O-ring; 13. a third O-ring; 14. a sixth O-ring; 15. a nozzle; 16. a hexagon socket head cap screw; 17. a compensation plate; 18. an adapter plate; 19. an amplifying circuit; 20. a four-core insert; 21. an insert mounting base; 22. a silica gel wire; 23. a fifth O-ring; 24. a flexible wire; 25. a display circuit board; 26. self-tapping screw; 27. an inclined gauge outfit; 28. a gauge outfit connecting seat; 29. a cylindrical pin; 30. a housing.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-2, the present utility model provides a technical solution: the differential pressure flowmeter comprises a flowmeter body 1, which is made of 316L stainless steel, is corrosion-resistant and can meet the requirements of high-sanitation standard industry, a probe seat 2 is arranged at the top of the flowmeter body 1, the probe seat 2 and the flowmeter body 1 are fixedly connected through a hexagon socket head cap screw 16, two probes 5 and a platinum resistor 9 are arranged in the probe seat 2, a retainer ring 3 is arranged at the bottom end of the probe 5, the retainer ring 3 and the probe 5 are welded along the circumference of a gap through argon arc welding equipment, a diaphragm 4 is fixedly connected between the retainer ring 3 and the probe 5 through the argon arc welding equipment along the circumference of an end face gap, a corrugated diaphragm 4 with the thickness of 0.05mm is adopted as a pressure sensing element, the diaphragm 4 is a circular membranous elastic sensitive element and has super-strong pressure sensing capability and elasticity, a first O-shaped ring 12 is arranged between the inner wall of the probe seat 2 and the probe 5, the inside of the probe seat 2 is provided with a diffusion silicon base 8, the diffusion silicon base 8 is provided with a diffusion silicon core 7, the high-precision diffusion silicon core 7 is adopted, the measurement precision can be improved to 0.1 percent F.S, the inside of the diffusion silicon core 7 is provided with an oil filling hole, the silicon oil filling technology is adopted, the silicon oil has excellent heat resistance, electrical insulation, weather resistance, hydrophobicity, physiological inertia and smaller surface tension, in addition, the silicon oil has low viscosity temperature coefficient, higher compression resistance, radiation resistance and other performances, the step of the diffusion silicon base 8 is provided with a second O-shaped ring 11, a third O-shaped ring 13 is arranged between the probe seat 2 and the flowmeter body 1, the top of the probe seat 2 is provided with a shell 30, the shell 30 and the probe seat 2 are fixedly connected through an inner hexagonal pyramid end set screw 6, a fourth O-shaped ring 10 is arranged between the top of the probe seat 2 and the shell 30, the top of the shell 30 is provided with an inclined gauge head 27, a fifth O-shaped ring 23 is arranged between the inclined gauge head 27 and the shell 30, a nozzle 15 is arranged in the flowmeter body 1, a nozzle 15 structure is adopted, so that pressure difference is generated between the front probe 5 end and the rear probe 5 end, real-time flow can be calculated, a sixth O-shaped ring 14 is arranged on one side of the nozzle 15, an argon arc welding device can be started to weld along the gap circumference of the retainer ring 3 and the probe 5 by clamping the diaphragm 4 between the retainer ring 3 and the probe 5, the first O-shaped ring 12 is placed in a sealing groove on the probe 5 after cooling, the probe 5 is placed in a hole of the probe seat 2, the argon arc welding device is started to weld along the gap circumference of the end surfaces of the probe 5 and the probe seat 2, compressed gas is used for cooling quickly after welding is finished, the other probe 5 is identical, the second O-shaped ring 11 is sleeved on the step of the diffusion silicon base 8, the diffusion silicon base 8 is placed in the hole of the probe seat 2, the argon arc welding is started to weld along the circumference of the gap between the diffusion silicon base 8 and the end face of the probe seat 2, compressed gas is used for cooling rapidly after the welding is finished, the argon arc welding is started to weld and plug the processing hole of the probe seat 2, then the silicone oil filling operation is carried out from the silicone oil filling hole of the diffusion silicon core 7, after the silicone oil filling is finished, the silicone oil filling hole is plugged by using steel ball spot welding, a third O-shaped ring 13 is placed in the sealing groove of the probe seat 2, then the probe seat 2 is fixed on the flowmeter body 1 by using an inner hexagonal cylindrical head screw 16, a fourth O-shaped ring 10 is arranged between the outer shell 30 and the probe seat 2 for sealing, a fifth O-shaped ring 23 is arranged between the inclined gauge head 27 and the outer shell 30, a sixth O-shaped ring 14 is arranged between the nozzle 15 and the inner wall of the flowmeter body 1 for sealing, multiple sealing is formed, dust and water mist can be effectively prevented from entering the inside to influence the circuit stability, and long-term stable and reliable operation of the product is ensured, the service life of the product is prolonged.

Referring to fig. 1-3, a compensating plate 17 is welded on a contact pin of a diffusion silicon base 8, an adapter plate 18 is inserted on the compensating plate 17, an amplifying circuit 19 is welded on the adapter plate 18, the amplifying circuit 19 is welded with an outgoing line of a platinum resistor 9, a display circuit board 25 is fixedly connected on an inclined gauge outfit 27 through a tapping screw 26, the display screen adopts an inclined angle design, eyes can be better protected by parallel eyes and the display screen from the perspective of ergonomics, and a backlight display screen is adopted, so that data can be observed under very weak light, stronger adaptability is achieved, a capacitive touch design is adopted for a display screen button, a good waterproof effect can be achieved, a gauge outfit connecting seat 28 is rotationally connected on a shell 30, a rotatable display gauge outfit structural design is adopted, a 320-degree rotating function is achieved, the display screen can be observed at different angles, the gauge outfit connecting seat 28 is clamped with the inclined gauge outfit 27 through a notch, an insert mounting seat 21 is welded on the shell 30, a four-core insert 20 is mounted on the insert mounting seat 21, a wire 22 is welded at the end of the four-core insert 20, the wire 22 is connected with the amplifying circuit 19 through the amplifying circuit 19, and the amplifying circuit 19 can be welded with the cylindrical pin 25 through the inclined circuit 29, and the cylindrical pin can be prevented from being rotated by 360 degrees, and the cylindrical pin can be welded by the cylindrical pin joint of the display screen 30.

During operation, the diaphragm 4 is clamped between the retainer ring 3 and the probe 5, argon arc welding equipment is started to weld along the circumference of a gap between the retainer ring 3 and the probe 5, the first O-shaped ring 12 is placed in a sealing groove on the probe 5 after cooling, the probe 5 is placed in a hole of the probe seat 2, the argon arc welding equipment is started to weld along the circumference of a gap between the probe 5 and the end face of the probe seat 2, compressed gas is used for cooling after welding is completed, the other probe 5 is used for cooling down, the second O-shaped ring 11 is sleeved on a step of the diffusion silicon base 8, the diffusion silicon base 8 is placed in the hole of the probe seat 2, argon arc welding is started to weld along the circumference of a gap between the diffusion silicon base 8 and the end face of the probe seat 2, compressed gas is used for cooling down after welding is completed, the argon arc welding is started to weld and plug the processing hole of the probe seat 2, then the silicone oil filling operation is carried out from the silicone oil filling hole of the diffusion silicon core 7, after the silicone oil filling operation is finished, the silicone oil filling hole is plugged by using a steel ball spot welding, the third O-shaped ring 13 is placed in the sealing groove of the probe seat 2, then the probe seat 2 is fixed on the flowmeter body 1 by using the hexagon socket head cap screw 16, the fourth O-shaped ring 10 is arranged between the shell 30 and the probe seat 2 for sealing, the fifth O-shaped ring 23 is arranged between the bevel gauge head 27 and the shell 30, the sixth O-shaped ring 14 is arranged between the nozzle 15 and the inner wall of the flowmeter body 1 for sealing, multiple sealing is formed, dust and water mist can be effectively prevented from entering the inside to influence the circuit stability, the long-term stable and reliable operation of the product is ensured, and the service life of the product is prolonged;

the method comprises the steps of filling a proper amount of silicone heat-conducting glue into a platinum resistor 9 probe hole, inserting the platinum resistor 9 into the hole, adopting a thermocouple temperature sensor, monitoring the environmental temperature change condition of a medium in real time, welding a compensation plate 17 onto a plug pin of a diffusion silicon base 8, inserting an adapter plate 18 onto the compensation plate 17 through a pin header, welding a platinum resistor 9 outgoing line onto an amplifying circuit 19, inserting the amplifying circuit 19 onto the adapter plate 18 through the pin header, welding a silica gel wire 22 onto the amplifying circuit 19, inserting one end of a flexible wire 24 onto a clamping groove of the amplifying circuit 19, welding an insert mounting seat 21 onto a shell 30 through argon arc welding, welding a cylindrical pin 29 onto the shell 30 through argon arc welding, penetrating a silica gel wire 22 onto a four-core insert 20 through a hole of the insert mounting seat 21, installing the four-core insert 20 into the hole of the insert mounting seat 21, fixing a display circuit board 25 onto a bevel gauge head 27 through a self-tapping screw 26, clamping a gauge head connecting seat 28 onto a positioning block on the bevel gauge head 27 through a notch, welding the flexible wire 24 on the amplifying circuit 19 onto the amplifying circuit 19, welding the flexible wire 24 onto the clamping groove 25 onto the bevel gauge head 27, and then installing a seal groove 23 into a seal groove 15, and installing a seal groove 15 into a meter body 15, and completing a meter assembly.

And all that is not described in detail in this specification is well known to those skilled in the art.

Claims

1. Differential pressure flowmeter, including flowmeter body (1), its characterized in that: the utility model discloses a flowmeter, including flowmeter body (1), probe seat (2) are inside to be equipped with two probes (5) and platinum resistance (9), probe (5) bottom is equipped with retaining ring (3), fixedly connected with diaphragm (4) between retaining ring (3) and the probe (5), be equipped with first O shape circle (12) between probe seat (2) inner wall and the probe (5), inside diffusion silicon base (8) that are equipped with of probe seat (2), be equipped with second O shape circle (11) on the step of diffusion silicon base (8), be equipped with third O shape circle (13) between probe seat (2) and flowmeter body (1), probe seat (2) top is equipped with shell (30), be equipped with fourth O shape circle (10) between probe seat (2) top and shell (30), be equipped with oblique gauge outfit (27) on the top (30), be equipped with fifth O shape circle (23) between oblique gauge outfit (27) and the shell (30), flowmeter body (1) is inside to be equipped with nozzle (15), sixth side is equipped with nozzle (14).

2. The differential pressure flow meter of claim 1, wherein: the check ring (3) and the probe (5) are welded along the circumference of the gap through argon arc welding equipment, and the probe (5) and the probe seat (2) are welded along the circumference of the end face gap through argon arc welding equipment.

3. The differential pressure flow meter of claim 1, wherein: the probe seat (2) is fixedly connected with the flowmeter body (1) through an inner hexagonal cylindrical head screw (16), and the shell (30) is fixedly connected with the probe seat (2) through an inner hexagonal cone end set screw (6).

4. The differential pressure flow meter of claim 1, wherein: the diffusion silicon base (8) is provided with a diffusion silicon core body (7), and an oil filling hole is formed in the diffusion silicon core body (7).

5. The differential pressure flow meter of claim 1, wherein: the contact pin of the diffusion silicon base (8) is welded with a compensation plate (17), the compensation plate (17) is inserted with an adapter plate (18), the adapter plate (18) is welded with an amplifying circuit (19), and the amplifying circuit (19) is welded with an outgoing line of the platinum resistor (9).

6. The differential pressure flow meter of claim 5, wherein: the utility model discloses a meter, including four core plug-in components, shell (30), plug-in components mount pad (21), display circuit board (25) is fixedly connected with through self tapping screw (26) on oblique gauge outfit (27), rotate on shell (30) and be connected with gauge outfit connecting seat (28), gauge outfit connecting seat (28) pass through breach and oblique gauge outfit (27) joint, the welding has plug-in components mount pad (21) on shell (30), install four core plug-in components (20) on plug-in components mount pad (21), four core plug-in components (20) tip welding has silica gel wire (22), silica gel wire (22) and amplifier circuit (19) welding.

7. The differential pressure flow meter of claim 6, wherein: the amplifying circuit (19) is connected with the display circuit board (25) through a flexible wire (24), and a cylindrical pin (29) is welded on the shell (30).