CN212461337U

CN212461337U - Oil injection system of differential pressure transmitter

Info

Publication number: CN212461337U
Application number: CN202021245821.9U
Authority: CN
Inventors: 豆延磊; 于洋; 张春巧; 孙亮; 韩虎; 陈会勇
Original assignee: LUXI INDUSTRY EQUIPMENT CO LTD
Current assignee: LUXI INDUSTRY EQUIPMENT CO LTD
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2021-02-02
Anticipated expiration: 2030-06-30

Abstract

The utility model belongs to the differential pressure transmitter field specifically provides a differential pressure transmitter oiling system. Including the one-level vacuum pump that links to each other with the oil tank, second grade diffusion pump, the oiling unit is parallelly connected with second grade diffusion pump with vacuum regulation unit, the oiling unit includes differential pressure transmitter, differential pressure transmitter includes the diaphragm of both sides, has the cavity to form the diaphragm grease chamber in the diaphragm, and the diaphragm grease chamber passes through the capillary and presses the clamp splice to be connected, presses to include the oil pocket in the clamp splice, and capillary and oil pocket exit end intercommunication. The inlet end of the oil cavity is connected with the oil injection joint, and all the oil injection joints are connected with the oil mass bottle. The vacuum regulating unit is connected with an oil pumping bottle vacuum electromagnetic valve, an oil pumping bottle, an oil filling and discharging valve, a second atmosphere valve and a vacuumizing electromagnetic valve in a closed mode. And a branch is connected with the oil measuring bottle between the atmospheric valve and the vacuumizing electromagnetic valve, and a branch is connected with the secondary diffusion pump between the vacuumizing electromagnetic valve and the oil bottle vacuum electromagnetic valve. The differential pressure transmitter oiling system does not need to use a large vacuum cover.

Description

Oil injection system of differential pressure transmitter

Technical Field

The utility model belongs to the differential pressure transmitter field specifically provides a differential pressure transmitter oiling system.

Background

The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.

A differential pressure transmitter is a meter used to measure differential pressure, flow, and liquid level. The structure of the device mainly comprises a display gauge outfit, a shell, a sensor module, a sensor connecting piece, a blind cover, a wiring terminal and the like.

The differential pressure transmitter has the phenomena of zero drift, poor linearity and low precision, and in order to solve the phenomena and search the cause for analysis, the oil injection effect of the transmitter is directly related to the quality. The original oil injection process adopts single-side vacuumizing oil injection. When the diaphragm is subjected to the acting force of internal vacuum and external atmospheric pressure during vacuumizing, the diaphragm deforms and is tightly pressed on the inner arc surface of the flange diaphragm seat, and the elasticity of the diaphragm is influenced after the diaphragm deforms within 2-5 hours; only one side of the clamping block is vacuumized, and the vacuum degree of the flange diaphragm seat side cannot reach absolute vacuum no matter how long the clamping block is vacuumized, so residual atmosphere still exists in the diaphragm oil chamber after oil is injected, and the oil quantity is not full; after oil injection is finished, a person needs to feel the amount of injected oil by hand, and the human factors are large, so that the oil amount on the two sides of high and low pressure is unbalanced, and the quality of the transmitter is influenced.

Therefore, the flange type differential pressure transmitter oil injection tool is provided in the prior art, double-side oil injection of the differential pressure transmitter can be achieved, however, the inventor finds that structures such as an overflow bottle and a pressure-variable clamping block in the oil injection tool are covered by the whole vacuum cover, the vacuum degree is difficult to accurately control in the using process, the liquid level of the overflow bottle is further difficult to accurately control, the vacuum cover covers a plurality of devices integrally, and the requirement on the sealing degree of the vacuum cover is high.

SUMMERY OF THE UTILITY MODEL

To flange type differential pressure transmitter oiling frock among the prior art be difficult to the accurate control oil gauge bottle liquid level, to the higher problem of vacuum cover degree of seal requirement, the utility model provides a differential pressure transmitter oiling system, include the one-level vacuum pump, the second grade diffusion pump that link to each other in proper order with the oil tank to and parallelly connected oiling unit and the vacuum regulation unit with the second grade diffusion pump, the oiling unit includes differential pressure transmitter, differential pressure transmitter includes the diaphragm of both sides, has the cavity in the diaphragm, the cavity is the diaphragm grease chamber, and the diaphragm grease chamber passes through the capillary and presses the clamp splice to be connected, presses and to include the oil pocket in the clamp splice, capillary and oil pocket exit end intercommunication. The inlet end of the oil cavity is connected with the oil injection joints through the capillary tube 21, and all the oil injection joints are connected with the oil mass bottle.

The vacuum regulating unit is a closed loop and is sequentially connected with an oil pumping bottle vacuum electromagnetic valve, a filtering bottle, an oil filling and draining valve, a second atmosphere valve and a vacuumizing electromagnetic valve. And a branch is connected with the oil measuring bottle between the atmospheric valve and the vacuumizing electromagnetic valve, and a branch is connected with the secondary diffusion pump between the vacuumizing electromagnetic valve and the oil bottle vacuum electromagnetic valve.

One of the above technical solutions has the following advantages or beneficial effects:

1) differential pressure transmitter oiling system only need seal whole for the oiling unit vacuum cover through adjusting the liquid level of a plurality of vacuum solenoid valve regulation oil measuring flask, lower to the equipment requirement, and vacuum regulation unit and oiling unit are parallelly connected, the vacuum of reasonable regulation oil measuring flask, the oiling is convenient.

2) The utility model discloses keep the advantage of two side oiling when need not the vacuum cover confined, and the oil mass bottle need not the overflow oiling, and equipment need not frequent maintenance.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the disclosure and, together with the description, serve to explain the disclosure and not to limit the disclosure.

Fig. 1 is a structure diagram of an oiling system of a differential pressure transmitter in embodiment 1.

Fig. 2 is a structure diagram of the oil injection system of the differential pressure transmitter in embodiment 2.

Wherein: 1. a suction flask; 2. an oil filling and discharging valve; 3. a second atmospheric valve; 4. an oil measuring bottle; 5. an oil pumping bottle vacuum electromagnetic valve; 6. a primary vacuum pump; 7. a secondary diffusion pump; 8. a control program; 9. vacuumizing an electromagnetic valve; 10. compressing the tool electromagnetic valve; 11. a reverse vacuumizing electromagnetic valve; 12. a first atmospheric valve; 13. pressing the tool; 14. reversely drawing the tool; 15. a flange diaphragm seat; 16. a diaphragm oil chamber; 17. a membrane; 18. a membrane; 19. a bolt; 20. pressing and changing the clamping block; 21. a capillary tube; 22. a sensor; 23. an oil chamber.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The differential pressure transmitter of the present disclosure is a conventional differential pressure transmitter in the prior art, such as a flanged differential pressure transmitter.

As described in the background art, the problems that the oil filling tool of the flange differential pressure transmitter in the prior art is difficult to accurately control the liquid level of an oil measuring bottle and has higher requirement on the sealing degree of a vacuum cover

In one or some embodiments of this disclosure, provide a differential pressure transmitter oiling system, include the one-level vacuum pump, the second grade diffusion pump that link to each other in proper order with the oil tank to and the oiling unit and the vacuum regulation unit parallelly connected with the second grade diffusion pump, the oiling unit includes differential pressure transmitter, differential pressure transmitter includes the diaphragm of both sides, has the cavity in the diaphragm, the cavity is the diaphragm grease chamber, and the diaphragm grease chamber passes through the capillary and presses the clamping block to be connected, presses to include the oil pocket in the clamping block, and capillary and oil pocket exit end intercommunication. The inlet end of the oil cavity is connected with the oil injection joint through a capillary tube, and all the oil injection joints are connected with the oil mass bottle.

Furthermore, a sensor is fixed on the pressing and changing clamping block in an extruding mode.

Furthermore, the oil chamber is tightly attached to the sensor.

Furthermore, press and become the clamp splice number and be 2 or 2 multiples, and both sides figure is equal, and every 2 press to become the fixed sensor of clamp splice to with the sensor fixed in the middle of.

Furthermore, the number of the oil injection joints corresponds to that of the pressing and variable clamping blocks.

Furthermore, the diaphragm is fixed on the flange diaphragm seat.

Furthermore, a pressing tool is arranged on the flange diaphragm seat and presses two sides of the diaphragm.

Furthermore, the opposite side of the diaphragm and the pressing tool is further provided with a reverse pumping tool, the reverse pumping tool is connected with a secondary diffusion pump, and a reverse pumping electromagnetic valve and a first atmosphere valve are arranged on a connecting pipeline of the secondary diffusion pump and the reverse pumping tool. The compressing tools are all connected with the secondary diffusion pump, and compressing tool electromagnetic valves are arranged on connecting pipelines of the compressing tools and the secondary diffusion pump.

Furthermore, the differential pressure transmitter oil injection system also comprises a control program, the control program is connected with a secondary diffusion pump, and the vacuum adjusting unit and the oil injection unit are connected with the secondary diffusion pump in parallel.

Furthermore, the control program is a PLC control program.

Example 1

As shown in fig. 1, the present embodiment provides a differential pressure transmitter oil injection system, which includes a primary vacuum pump 6, a secondary diffusion pump 7, and an oil injection unit and a vacuum regulation unit connected in parallel with the secondary diffusion pump 7.

Oiling unit includes differential pressure transmitter, differential pressure transmitter includes the diaphragm 17 of both sides, has the cavity in the diaphragm 17, the cavity is diaphragm grease chamber 16, and diaphragm grease chamber 16 passes through capillary 21 and presses the clamp splice 20 to be connected, presses and includes oil pocket 23 in the clamp splice 20, presses the clamp splice 20 extrusion to be fixed with sensor 22, oil pocket 23 hugs closely with sensor 22, and capillary 21 communicates with oil pocket 23 exit end. The inlet end of the oil chamber 23 is connected with the oil filling joints 18 through the capillary tube 21, and all the oil filling joints 18 are connected with the oil mass bottle 4.

The two pressing and variable clamping blocks 20 are provided, one sensor 22 is fixed on the two pressing and variable clamping blocks 20, the sensor 22 is fixed in the middle, and the two pressing and variable clamping blocks 20 are connected through bolts 19. The number of the oil injection joints 18 is two corresponding to the pressing and changing clamping blocks. The number of the pressure-variable clamping blocks 20 and the number of the oil injection joints 18 are set to be two so as to be adapted to the number of the diaphragms 17, and in order to increase the oil injection amount, the number of the pressure-variable clamping blocks and the number of the oil injection joints can be set to be a multiple of 2 on the premise of keeping the sensitivity of the sensor, and the number of the two sides is kept equal.

The diaphragm 17 is fixed on the flange diaphragm seat, the flange diaphragm seat is provided with a pressing tool 13, and the pressing tool 13 presses two sides of the diaphragm 17. The diaphragm 17 still sets up anti-frock 14 of taking out with the offside that compresses tightly frock 13, anti-frock 14 of taking out is connected with second grade diffusion pump 7, there are anti-vacuum solenoid valve 11 and first atmosphere valve 12 of taking out on the connecting line of second grade diffusion pump 7 and anti-frock of taking out. The pressing tools 13 are all connected with the secondary diffusion pump 7, and pressing tool electromagnetic valves 10 are arranged on connecting pipelines of the pressing tools 13 and the secondary diffusion pump 7.

The vacuum regulating unit is a closed loop and is sequentially connected with an oil pumping bottle vacuum electromagnetic valve 5, a filtering bottle 1, an oil filling and discharging valve 2, a second atmosphere valve 3 and a vacuumizing electromagnetic valve 9. And a branch is connected with the oil measuring flask 4 between the atmospheric valve 3 and the vacuumizing electromagnetic valve 9, and a branch is connected with the secondary diffusion pump 7 between the vacuumizing electromagnetic valve 5 and the vacuumizing electromagnetic valve 9.

Differential pressure transmitter oiling system just need not to seal whole for the oiling unit vacuum cover through the liquid level of adjusting a plurality of vacuum solenoid valve regulation oil measuring flask, lower to equipment requirement, and vacuum regulation unit and oiling unit are parallelly connected, the vacuum of reasonable regulation oil measuring flask, the oiling is convenient.

Example 2

The difference between the differential pressure transmitter oiling system provided by the embodiment and the embodiment 1 is that the differential pressure transmitter oiling system further comprises a control program 8, the control program 8 is connected with a secondary diffusion pump 7, and the vacuum adjusting unit and the oiling unit are both connected in parallel with the secondary diffusion pump 7.

The control program 8 is a PLC control program.

Example 3

The embodiment provides a differential pressure transmitter oiling method which is carried out in the differential pressure transmitter oiling system in the embodiment 1.

Firstly, the silicone oil in the oil bottle 4 is vacuumized, and the steps are as follows: closing the electromagnetic valve 5 of the oil pumping bottle, opening the electromagnetic valve 10 of the compaction tool for 2 seconds, opening the vacuum electromagnetic valve 9 of the pumping system and the inverse vacuum electromagnetic valve 11, keeping the vacuum degree of the system for 5 minutes after reaching 6.0E-1, opening the vacuum electromagnetic valve 5 of the oil pumping bottle, and setting the vacuum pumping time according to the length of the capillary tube 21. Thereby adjusting the liquid level in the oil measuring flask 4.

And when the vacuum value is higher than 6.0E-1, the electric shock output is carried out, the vacuum electromagnetic valve 5, the vacuumizing electromagnetic valve 9 and the anti-vacuumizing electromagnetic valve 11 are closed at the same time, 2 seconds later, the first atmosphere valve 12 is opened, the pressing tool electromagnetic valve 10 is closed, the oil injection and oil discharge valve 2 is opened, oil injection is started, the liquid level is observed, and the oil injection and oil discharge valve 2 is closed after the oil injection is finished. After 5 minutes, the system vacuum solenoid valve 9 is closed, and after 2 seconds, the second atmosphere valve 3 is opened. And (3) closing the reverse vacuumizing electromagnetic valve 11, opening the atmospheric valve 12 after 2 seconds, and closing the pressing tool 13. The delay time is set for balancing the oil injection amount of the positive and negative pressure chambers of the differential pressure transmitter after oil injection is finished, and ensuring that the oil amount on two sides is uniform.

Example 4

The embodiment provides a differential pressure transmitter oiling method which is carried out in the differential pressure transmitter oiling system in the embodiment 2.

After the control program 8 is powered on, the oil pumping bottle vacuum electromagnetic valve 5 is opened, the touch screen is clicked to operate, the silicon oil in the oil mass bottle 4 is vacuumized, the oil pumping bottle electromagnetic valve 5 is closed, the compaction tool electromagnetic valve 10 is opened, after 2 seconds, the system vacuum electromagnetic valve 9 and the reverse vacuum electromagnetic valve 11 are opened, when the system vacuum degree reaches 6.0E < -1 >, the system vacuum electromagnetic valve 5 is kept for 5 minutes, and the vacuum time is set according to the length of the capillary tube 21. Thereby adjusting the liquid level in the oil measuring flask 4.

And when the vacuum value is higher than 6.0E-1, the electric shock output is carried out, the vacuum electromagnetic valve 5, the vacuumizing electromagnetic valve 9 and the anti-vacuumizing electromagnetic valve 11 are closed at the same time, 2 seconds later, the first atmosphere valve 12 is opened, the pressing tool electromagnetic valve 10 is closed, the oil injection and discharge valve 2 is opened, oil injection is started, and the oil injection and discharge valve 2 is closed after the oil injection is finished. After 5 minutes, the system vacuum solenoid valve 9 is closed, and after 2 seconds, the second atmosphere valve 3 is opened. And (3) closing the reverse vacuumizing electromagnetic valve 11, opening the atmospheric valve 12 after 2 seconds, and closing the pressing tool 13.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, therefore, the invention is not limited thereto.

Claims

1. The oil injection system of the differential pressure transmitter is characterized by comprising a primary vacuum pump, a secondary diffusion pump, an oil injection unit and a vacuum adjusting unit, wherein the primary vacuum pump and the secondary diffusion pump are sequentially connected with an oil tank;

the vacuum regulating unit is a closed loop and is sequentially connected with an oil pumping bottle vacuum electromagnetic valve, a filtering bottle, an oil filling and draining valve, a second atmosphere valve and a vacuumizing electromagnetic valve, a branch is connected between the atmosphere valve and the vacuumizing electromagnetic valve and is connected with an oil measuring bottle, and a branch is connected between the oil pumping bottle vacuum electromagnetic valve and the vacuumizing electromagnetic valve and is connected with a secondary diffusion pump.

2. The differential pressure transmitter oiling system of claim 1, wherein the pressure variable clamp block is extruded with a sensor fixed thereto.

3. The differential pressure transmitter oiling system of claim 2, wherein the oil chamber is in close proximity to the sensor.

4. The differential pressure transmitter oiling system of claim 1, wherein the number of the pressure variable clamping blocks is 2 or a multiple of 2, the number of the two sides is equal, and each 2 pressure variable clamping blocks are fixed with one sensor and fix the sensors in the middle.

5. The differential pressure transmitter oiling system of claim 4, wherein the oiling joints correspond to the number of the pressure variable clamping blocks.

6. The differential pressure transmitter oiling system of claim 1, wherein the diaphragm is fixed to a flanged diaphragm seat.

7. The differential pressure transmitter oiling system of claim 6, wherein the flange diaphragm seat has a hold down fixture that holds down both sides of the diaphragm.

8. The differential pressure transmitter oil injection system according to claim 7, wherein a reverse pumping tool is further arranged on the opposite side of the diaphragm and the compressing tool, the reverse pumping tool is connected with a secondary diffusion pump, a reverse pumping solenoid valve and a first atmosphere valve are arranged on a connecting pipeline of the secondary diffusion pump and the reverse pumping tool, the compressing tools are both connected with the secondary diffusion pump, and a compressing tool solenoid valve is arranged on a connecting pipeline of the compressing tool and the secondary diffusion pump.

9. The differential pressure transmitter oiling system of claim 1, further comprising a control program, wherein the control program is connected to a secondary diffusion pump, and the vacuum regulation unit and the oiling unit are both connected in parallel to the secondary diffusion pump.

10. The differential pressure transmitter oiling system of claim 9, wherein the control program is a PLC control program.