CN114368723B - Quantitative oil filling method for base diaphragm capsule - Google Patents
Quantitative oil filling method for base diaphragm capsule Download PDFInfo
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- CN114368723B CN114368723B CN202111327676.8A CN202111327676A CN114368723B CN 114368723 B CN114368723 B CN 114368723B CN 202111327676 A CN202111327676 A CN 202111327676A CN 114368723 B CN114368723 B CN 114368723B
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- filling
- transmitter
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000002775 capsule Substances 0.000 title claims abstract description 16
- 238000006073 displacement reaction Methods 0.000 claims abstract description 61
- 238000009434 installation Methods 0.000 claims abstract description 11
- 230000008961 swelling Effects 0.000 claims abstract description 5
- 230000005484 gravity Effects 0.000 claims abstract description 4
- 238000005086 pumping Methods 0.000 claims description 56
- 238000007789 sealing Methods 0.000 claims description 14
- 238000004891 communication Methods 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 239000012528 membrane Substances 0.000 description 9
- 229920002545 silicone oil Polymers 0.000 description 5
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 3
- 229910052731 fluorine Inorganic materials 0.000 description 3
- 239000011737 fluorine Substances 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000008602 contraction Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/04—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes for transferring fuels, lubricants or mixed fuels and lubricants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
- B67D7/36—Arrangements of flow- or pressure-control valves
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
- B67D7/58—Arrangements of pumps
- B67D7/62—Arrangements of pumps power operated
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
- B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
- B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
- B67D7/06—Details or accessories
- B67D7/78—Arrangements of storage tanks, reservoirs or pipe-lines
Abstract
The invention discloses a quantitative oil filling method for a base diaphragm capsule, which comprises the following steps: a. preparing installation; b. vacuumizing: vacuumizing an internal pipeline of the transmitter base to be less than 1Pa by using a vacuum pump and maintaining for more than 2 hours; c. pre-filling oil: closing the vacuum pump, opening an oil filling valve below the oil tank, and filling the filling oil in the oil tank into an inner pipeline and an oil filling pipeline of the transmitter base under the action of gravity; d. and (3) accurate oil filling: closing an oil filling valve, pushing an oil cylinder on an oil filling pipeline, extruding filling oil into a transmitter base under the pressure effect, slowly swelling a base diaphragm, stopping the oil cylinder when the displacement reaches a set value, and optimally displacing the base diaphragm at the moment, wherein the linearity of the base diaphragm at the position is best; e. and taking out the base. The invention provides a quantitative oil filling method for a base diaphragm capsule, which utilizes a displacement sensor to accurately control the displacement of the bulge of a base diaphragm, thereby realizing quantitative control of filling oil in a transmitter base.
Description
Technical Field
The invention relates to the technical field of base diaphragm capsule oil filling, in particular to a base diaphragm capsule quantitative oil filling method.
Background
In the field of pressure transmitters, filling oil (such as silicone oil, fluorine oil and the like) is generally used for conducting pressure, so that the pressure of an object to be measured is conducted to a pressure core, and the filling oil is required to be in a closed environment. The closed space in the field of pressure transmitter consists of diaphragm, base, capillary tube, etc. Because the filling oil is influenced by the external environment temperature and has expansion and contraction, the filling oil has uncertain internal pressure in the closed space, and the measurement accuracy and stability of the pressure transmitter can be influenced. Therefore, quantitative oil filling is required to be carried out on the filling oil in the closed space, so that the internal stress of the filling oil can be effectively estimated, and the batch consistency and the product stability are improved. Because the length of the capillary tube has various specifications, under the condition of the same specification, the essence of controlling the oil filling quantity is controlling the oil filling quantity in the base diaphragm capsule, and the volume of the oil filling quantity is small and is about 1000mm 3 Therefore, how to quantitatively control the oil filling amount becomes a difficult problem. Currently, the main quantitative oil filling scheme is mainly controlled by a quantitative pump, and the high-precision quantitative pump of the scheme has extremely high cost. Still other solutions control the volume of the oil filling by squeezing a fixed length of fine-filled tubing, but with poor accuracy. Aiming at the problems existing in the oil filling of the transmitter, the invention provides a quantitative oil filling method of a base diaphragm capsule. The method monitors the displacement of the base diaphragm in real time through an accurate displacement sensor, and controls the actual oil filling quantity in the diaphragm box through controlling the bulge displacement of the diaphragm.
Chinese patent application publication No. CN206705662U, publication day is 2017 12 month 05 day, the name is "an automatic quantitative oil filling machine", discloses an fluid processing equipment field, and is multi-purpose in fluid filling, specifically provides an automatic quantitative oil filling machine, including the frame with locate the batch oil tank of frame top, its characterized in that: the frame is provided with a first conveying mechanism, an oil filling device, a second conveying mechanism and an electronic automatic control system, a positioning oil guide barrel device is further arranged on the roller conveyor, a quantifying device and a temperature sensor are arranged in the oil storage tank, and the oil filling device is connected with the quantifying device through an oil guide pipe; the first conveying mechanism, the oil filling device and the positioning oil guiding barrel device are all connected with an electronic automatic control system. The oil filling device comprises a mounting bracket, an oil guide pipe and two or more filling nozzles; the quantitative device comprises a driving device, a push rod, a frame, a rocker arm and a quantitative cup, wherein the driving device controls the quantitative cup to reciprocate up and down in the oil storage tank, the quantitative cup comprises a cup body, a partition board and a cavity formed by the cup body are arranged at the bottom of the quantitative cup, a cylinder is driven at the back of the partition board, and the partition board is driven to move up and down so as to change the volume. According to the scheme, although the oil filling quantity can be adjusted by adjusting the position of the quantitative cup, the accuracy is poor. In addition, the oil loss exists on the inner wall of the pipeline in the oil filling process of the transmitter, and the amount of oil discharged from the oil tank cannot be completely discharged into the inner space of the transmitter.
Disclosure of Invention
The invention provides a quantitative oil filling method for a base diaphragm capsule, which aims to solve the problem of inaccurate oil filling control in the base diaphragm capsule in the prior art, and utilizes a displacement sensor to accurately control the bulged displacement of the base diaphragm, so as to realize quantitative control of filling oil in a transmitter base.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a quantitative oil filling method for a base diaphragm capsule comprises the following steps:
a. mounting preparation: mounting the assembled transmitter base on an installation tool, wherein the installation tool is provided with a displacement sensor which can detect the displacement of the base diaphragm at a position corresponding to the base diaphragm of the base body on the transmitter base;
b. vacuumizing: vacuumizing an internal pipeline of the transmitter base to be less than 1Pa by using a vacuum pump and maintaining for more than 2 hours;
c. pre-filling oil: closing the vacuum pump, opening an oil filling valve below the oil tank, and filling the filling oil in the oil tank into an inner pipeline and an oil filling pipeline of the transmitter base under the action of gravity;
d. and (3) accurate oil filling: closing an oil filling valve, pushing an oil cylinder on an oil filling pipeline, extruding filling oil into a transmitter base under the action of pressure, and slowly swelling a base diaphragm, wherein in the process, a displacement sensor is always used for recording the swelling displacement of the base diaphragm, when the displacement reaches a set value, the oil cylinder stops moving, the base diaphragm is at the optimal displacement, and the linearity of the base diaphragm at the position is the best;
e. and (3) taking out the base: and sealing an oil sealing port on the transmitter base, and detaching the transmitter base.
In the technical scheme, the filling oil comprises but is not limited to silicone oil, high-temperature silicone oil and fluorine oil, and an oil sealing port is formed in the transmitter base. The displacement sensor in the method can detect the displacement of the base diaphragm, and the displacement sensor is utilized to accurately control the bulge displacement of the base diaphragm, so that the quantitative control of the filling oil in the base of the transmitter can be realized.
Preferably, a back-pumping pipe is further arranged on one side, provided with the displacement sensor, of the mounting tool, the back-pumping pipe is externally connected with a back-pumping valve and a back-pumping pump, and the back-pumping pump and the back-pumping valve are simultaneously opened when the back-pumping pipe is vacuumized in the step b, so that the space outside the diaphragm is vacuumized by the back-pumping pipe, the inner side and the outer side of the diaphragm are both in a vacuum state, and the diaphragm is not tightly attached to the base body under the action of internal stress; and c, before pre-filling oil, closing the back pumping valve, so that the air pressure of the space outside the diaphragm is larger than the air pressure of the inner side of the base diaphragm, and closing the vacuum valve after the base diaphragm is tightly attached to the base body.
In the technical scheme, after the base diaphragm clings to the base body, the displacement sensor resets to zero. The space outside the diaphragm can be vacuumized through the back-pumping pump, so that the pressure borne by the base diaphragm in the vacuumization process is reduced, the air between the base diaphragm and the base body can be fully discharged, and the influence of the internal air on the oil filling quantity precision is reduced.
Preferably, a back-pumping pipe is further arranged on one side of the mounting tool, provided with the displacement sensor, and is externally connected with a back-pumping valve and a back-pumping pump, when the back-pumping pipe is vacuumized in the step b, the back-pumping valve and the back-pumping valve are opened first to vacuumize the space outside the diaphragm, and then the vacuum pump is opened to ensure that the air pressure of the space outside the diaphragm is always lower than the air pressure of the inner side of the base diaphragm; and c, before pre-filling oil, closing the back pumping valve, so that the air pressure of the space outside the diaphragm is larger than the air pressure of the inner side of the base diaphragm, and closing the vacuum pump after the base diaphragm is tightly attached to the base body.
In the technical scheme, after the base diaphragm clings to the base body, the displacement sensor resets to zero. The back-pumping and back-pumping valve is opened firstly when the back-pumping pump is used for vacuumizing the space outside the diaphragm, so that the back-pumping pipe is used for vacuumizing the space outside the diaphragm, then the vacuum pump is opened, the air pressure of the space outside the diaphragm is always lower than the air pressure of the inner side of the base diaphragm, the base diaphragm can always keep away from the base body, if the base diaphragm is always clung to the base body, some bubbles can be generated between the base diaphragm and the base body at the beginning, and because the base diaphragm is always clung to the base body, air in the bubbles cannot be absorbed, so that the exhaust is incomplete, the oil filling accuracy is affected, the air between the base diaphragm and the base body can be fully exhausted, and the influence of the internal air on the oil filling accuracy is reduced.
Preferably, the mounting tool comprises a main support shaft, a displacement sensor, a base mounting plate, a base, a corner cylinder, a cylinder chuck and a back-pumping pipe; the base mounting plate is connected with the main support shaft, the base is detachably connected with the base mounting plate, the corner cylinder is fixed with the base mounting plate, the cylinder chuck is fixed with the rotating arm of the corner cylinder, the base and the cylinder chuck clamp the transmitter base, the displacement sensor is fixed with the base mounting plate, and one end of the displacement sensor penetrates through the base and is close to the base diaphragm on the transmitter base.
The installation fixture can be used for installing the transmitter base, and the corner cylinder can drive the cylinder chuck to rotate and also can enable the cylinder chuck to translate for a certain distance (such as an ACK cylinder). When the transmitter is used, the transmitter base is placed on the base seat, the corner cylinder drives the cylinder chuck to rotate to the outer side of the transmitter base, and the cylinder chuck is pressed against the transmitter base. The base is detachably connected with the base mounting plate, different base bases can be replaced according to the needs, and different transmitter bases are adapted.
Preferably, a sealed diaphragm outer space is formed by enclosing among the base mounting disc, the base and the base diaphragm on the clamping transmitter base, one end of the back suction pipe is communicated with the diaphragm outer space, and the other end of the back suction pipe is communicated with the back suction pump.
The structure can also vacuumize the outer space of the diaphragm, so that air between the base diaphragm and the base body can be fully discharged, and the influence of internal air on the oil filling quantity precision is reduced.
Preferably, the displacement sensor is aligned to the center position of the base diaphragm on the base of the tight transmitter, a communication gap is arranged between the displacement sensor and the base, and the back suction pipe is communicated with the space outside the diaphragm through the communication gap. The displacement sensor is aligned with the center position of the base diaphragm on the base of the tight transmitter, so that the detection of the displacement sensor can be more accurate.
Preferably, the base mounting plate is rotatably connected with the main support shaft through a bearing structure. The base mounting plate adopts rotary design, and the oil sealing port on the base body of the transmitter is enabled to be upwards all the time through rotation.
Preferably, the base seat and the base mounting plate are detachably connected through a threaded structure.
Preferably, the device further comprises an oil filling pipeline system, the oil filling pipeline system comprises a vacuum pump, a vacuum valve, a pre-pumping valve, an oil tank, an oil filling valve and an oil cylinder, one end of the vacuum valve is communicated with the vacuum pump, the other end of the vacuum valve is respectively communicated with one end of the pre-pumping valve and one end of the oil tank through a three-way pipe, the other end of the pre-pumping valve is communicated with an oil filling port, the other end of the oil tank is communicated with the oil filling valve, the other end of the oil filling valve is respectively communicated with the oil filling port and one end of the oil cylinder through a three-way pipe, and an oil sealing port on a transmitter base of the oil filling port is communicated.
The beneficial effects of the invention are as follows: (1) The displacement sensor is utilized to precisely control the bulge displacement of the base diaphragm, so that the quantitative control of the filling oil in the transmitter base can be realized; (2) The back pumping pump can be used for vacuumizing the outer space of the diaphragm, so that the inner space and the outer space of the base diaphragm are in a vacuum state, the base diaphragm can be kept far away from the base body of the transmitter all the time due to internal stress, air between the base diaphragm and the base body of the transmitter can be fully discharged, and the influence of internal air on the oil filling quantity precision is reduced; (3) The back pumping pump can be used for vacuumizing the space outside the diaphragm, so that the air pressure of the space outside the base diaphragm is always lower than the air pressure of the inner side of the base diaphragm, the base diaphragm can be always kept away from the base body of the transmitter, air between the base diaphragm and the base body of the transmitter can be fully discharged, and the influence of the internal air on the oil filling quantity precision is reduced; (4) The base is detachably connected with the base mounting plate, different base bases can be replaced according to the needs, and different transmitter bases are adapted.
Drawings
FIG. 1 is a schematic view of a mounting fixture according to the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
fig. 3 is a schematic structural diagram of the oil filling pipe system in the present invention.
In the figure: the installation fixture 1, a main support shaft 1.1, a displacement sensor 1.2, a base mounting disc 1.3, a base seat 1.4, a corner cylinder 1.5, a cylinder chuck 1.6, a back suction pipe 1.7, a transmitter base 2, a base body 2.1, a base diaphragm 2.2, a diaphragm outer space 2.3, an oil filling pipeline system 3, a vacuum pump 3.1, a vacuum valve 3.2, a pre-suction valve 3.3, an oil tank 3.4, an oil filling valve 3.5, an oil cylinder 3.6 and an oil filling interface 3.7.
Description of the embodiments
The invention is further described below with reference to the drawings and specific embodiments.
Example 1:
as shown in fig. 1, 2 and 3, a base bellows quantitative oil filling method includes the following steps:
a. mounting preparation: the assembled transmitter base 2 is installed on an installation tool 1, and a displacement sensor 1.2 capable of detecting the displacement of the base diaphragm 2.2 is arranged on the installation tool 1 at a position corresponding to the base diaphragm 2.2 of the base body 2.1 on the transmitter base 2;
b. vacuumizing: firstly, opening a back-pumping valve and a back-pumping valve to enable a back-pumping pipe 1.7 to vacuumize a space 2.3 outside a diaphragm, and then vacuumizing an inner pipeline of a transmitter base 2 to be below 1Pa by utilizing a vacuum pump 3.1 and maintaining the pressure of the space 2.3 outside the diaphragm to be lower than the pressure of the inner side of the base diaphragm 2.2 all the time;
c. pre-filling oil: firstly, closing a back-pumping valve, enabling the air pressure of a space 2.3 outside a diaphragm to be larger than the air pressure of the inner side of a base diaphragm 2.2, enabling the base diaphragm 2.2 to be clung to a base body 2.1, then closing a vacuum pump 3.1, opening an oil filling valve 3.5 below an oil tank 3.4, and filling the filling oil in the oil tank 3.4 into an inner pipeline and an oil filling pipeline of a transmitter base 2 under the action of gravity;
d. and (3) accurate oil filling: closing the oil filling valve 3.5, pushing the oil cylinder 3.6 on the oil filling pipeline, extruding the filling oil into the transmitter base 2 under the pressure effect, so that the base diaphragm 2.2 slowly bulges, in the process, recording the bulged displacement of the base diaphragm 2.2 by the displacement sensor 1.2 all the time, stopping the motion of the oil cylinder 3.6 when the displacement reaches a set value, and enabling the base diaphragm 2.2 to be in optimal displacement, wherein the linearity of the base diaphragm 2.2 is optimal;
e. and (3) taking out the base: the transmitter base 2 is disassembled, and an oil sealing port on the transmitter base 2 is sealed.
In the above technical scheme, the filling oil includes but is not limited to silicone oil, high temperature silicone oil and fluorine oil, and the transmitter base 2 is provided with an oil sealing port. The displacement sensor 1.2 in the method can detect the displacement of the base diaphragm 2.2, and the displacement sensor 1.2 is used for precisely controlling the bulge displacement of the base diaphragm 2.2, so that the quantitative control of filling oil in the transmitter base 2 can be realized. The membrane outside space 2.3 can be vacuumized through the back-pumping pump, when the step b vacuumizes, the back-pumping valve and the back-pumping valve are opened firstly, the back-pumping pipe 1.7 vacuumizes the membrane outside space 2.3, then the vacuum pump 3.1 is opened, the air pressure of the membrane outside space 2.3 is always lower than the air pressure of the inner side of the base membrane 2.2, the base membrane 2.2 can be always kept away from the base body 2.1, (if the base membrane 2.2 is always tightly attached to the base body 2.1, some bubbles can be generated between the base membrane 2.2 and the base body 2.1 at the beginning, and the air in the bubbles can not be absorbed due to the fact that the base membrane 2.2 is always tightly attached to the base body 2.1, so that the air exhaust is not thorough and the oil filling accuracy is affected, the air between the base membrane 2.2 and the base body 2.1 can be fully discharged, and the influence of the internal air on the oil filling accuracy is reduced.
Example 2:
as shown in fig. 1 and 2, on the basis of embodiment 1, the installation tool 1 comprises a main support shaft 1.1, a displacement sensor 1.2, a base installation plate 1.3, a base 1.4, a corner cylinder 1.5, a cylinder chuck 1.6 and a back suction pipe 1.7; the base mounting plate 1.3 is rotatably connected with the main support shaft 1.1 through a bearing structure, the base 1.4 is detachably connected with the base mounting plate 1.3 through a threaded structure, the base 1.4 is sealed with the base mounting plate 1.3 through an O-shaped sealing ring, a sealing groove is arranged on the base 1.4, the base 1.4 is sealed with the base body 2.1 through the O-shaped sealing ring, the corner cylinder 1.5 is fixed with the base mounting plate 1.3, the cylinder chuck 1.6 is fixed with a rotating arm of the corner cylinder 1.5, the base 1.4 and the cylinder chuck 1.6 clamp the transmitter base 2, the displacement sensor 1.2 is fixed with the base mounting plate 1.3, and one end of the displacement sensor 1.2 penetrates the base 1.4 and is close to the base diaphragm 2 on the transmitter base 2. The base mounting plate 1.3, the base 1.4 and the base diaphragm 2.2 on the clamping transmitter base 2 enclose a sealed diaphragm outside space 2.3, one end of the back suction pipe 1.7 is communicated with the diaphragm outside space 2.3, and the other end of the back suction pipe 1.7 is communicated with the back suction pump. The displacement sensor 1.2 is aligned to the central position of the base diaphragm 2.2 on the tight transmitter base 2, a communication gap is arranged between the displacement sensor 1.2 and the base 1.4, and the back suction pipe 1.7 is communicated with the diaphragm outer space 2.3 through the communication gap. A conical groove is arranged on one side of the base 1.4 close to the base body 2.1, so that the base diaphragm 2.2 has a movable space,
when the transmitter base 2 is used, the transmitter base 2 is placed on the base 1.4, the corner cylinder 1.5 drives the cylinder chuck 1.6 to rotate to the outer side of the transmitter base 2, and the cylinder chuck 1.6 is pressed against the transmitter base 2. The base seat 1.4 is detachably connected with the seat mounting plate 1.3, and different base seats 1.4 can be replaced according to the needs to adapt to different transmitter bases 2.
Example 3:
as shown in fig. 3, on the basis of embodiment 1, the device further comprises an oil filling pipeline system 3, the oil filling pipeline system 3 comprises a vacuum pump 3.1, a vacuum valve 3.2, a pre-pumping valve 3.3, an oil tank 3.4, an oil filling valve 3.5 and an oil cylinder 3.6, one end of the vacuum valve 3.2 is communicated with the vacuum pump 3.1, the other end of the vacuum valve 3.2 is respectively communicated with one end of the pre-pumping valve 3.3 and one end of the oil tank 3.4 through a three-way pipe, the other end of the pre-pumping valve 3.3 is communicated with an oil filling port 3.7, the other end of the oil tank 3.4 is communicated with the oil filling valve 3.5, the other end of the oil filling valve 3.5 is respectively communicated with one ends of the oil filling port 3.7 and the oil cylinder 3.6 through a three-way pipe, and an oil sealing port on a transmitter base 2 of the oil filling port 3.7 is communicated.
The beneficial effects of the invention are as follows: (1) The displacement sensor 1.2 is utilized to precisely control the bulge displacement of the base diaphragm 2.2, so that the quantitative control of the filling oil in the transmitter base 2 can be realized; (2) The back pumping pump can be used for vacuumizing the outer space of the diaphragm, so that the inner space and the outer space of the base diaphragm are in a vacuum state, the base diaphragm can be kept far away from the base body of the transmitter all the time due to internal stress, air between the base diaphragm and the base body of the transmitter can be fully discharged, and the influence of internal air on the oil filling quantity precision is reduced; (3) The back pumping pump can be used for vacuumizing the space 2.3 outside the diaphragm, so that the air pressure of the space outside the base diaphragm 2.2 is always lower than the air pressure inside the base diaphragm 2.2, the base diaphragm 2.2 can be always kept away from the body of the transmitter base 2, the air between the base diaphragm 2.2 and the body of the transmitter base 2 can be fully discharged, and the influence of the internal air on the oil filling quantity precision is reduced; (4) The base seat 1.4 is detachably connected with the seat mounting plate 1.3, and different base seats 1.4 can be replaced according to the needs to adapt to different transmitter bases 2.
Claims (8)
1. The quantitative oil filling method for the base diaphragm capsule is characterized by comprising the following steps of:
a. mounting preparation: mounting the assembled transmitter base on an installation tool, wherein the installation tool is provided with a displacement sensor which can detect the displacement of the base diaphragm at a position corresponding to the base diaphragm of the base body on the transmitter base;
b. vacuumizing: vacuumizing an internal pipeline of the transmitter base to be less than 1Pa by using a vacuum pump and maintaining for more than 2 hours;
c. pre-filling oil: closing the vacuum pump, opening an oil filling valve below the oil tank, and filling the filling oil in the oil tank into an inner pipeline and an oil filling pipeline of the transmitter base under the action of gravity;
d. and (3) accurate oil filling: closing an oil filling valve, pushing an oil cylinder on an oil filling pipeline, extruding filling oil into a transmitter base under the action of pressure, and slowly swelling a base diaphragm, wherein in the process, a displacement sensor is always used for recording the swelling displacement of the base diaphragm, and when the displacement reaches a set value, the oil cylinder stops moving, and the base diaphragm is at the optimal displacement;
e. and (3) taking out the base: sealing an oil sealing port on the transmitter base, and detaching the transmitter base;
the mounting tool is characterized in that a back-pumping pipe is further arranged on one side of the mounting tool, provided with the displacement sensor, and is externally connected with a back-pumping valve and a back-pumping pump, and the back-pumping pump and the back-pumping valve are simultaneously opened when the mounting tool is used for vacuumizing in the step b, so that the back-pumping pipe vacuumizes the space outside the diaphragm, the inner side and the outer side of the diaphragm are in a vacuum state, and the diaphragm is not tightly attached to the base body under the action of internal stress; and c, before pre-filling oil, closing the back pumping valve, so that the air pressure of the space outside the diaphragm is larger than the air pressure of the inner side of the base diaphragm, and closing the vacuum valve after the base diaphragm is tightly attached to the base body.
2. The quantitative oil filling method of a base diaphragm capsule according to claim 1, wherein in the step b, when the vacuum is pumped, the back-pumping valve is opened first, so that the back-pumping pipe pumps the space outside the diaphragm, and then the vacuum pump is opened, so that the air pressure of the space outside the diaphragm is always lower than the air pressure inside the base diaphragm.
3. The method for quantitatively filling oil into a base diaphragm capsule according to claim 1 or 2, wherein the mounting fixture comprises a main support shaft, a displacement sensor, a base mounting plate, a base, a corner cylinder, a cylinder chuck and a back-pumping pipe; the base mounting plate is connected with the main support shaft, the base is detachably connected with the base mounting plate, the corner cylinder is fixed with the base mounting plate, the cylinder chuck is fixed with the rotating arm of the corner cylinder, the base and the cylinder chuck clamp the transmitter base, the displacement sensor is fixed with the base mounting plate, and one end of the displacement sensor penetrates through the base and is close to the base diaphragm on the transmitter base.
4. A method of quantitatively filling oil into a base bellows according to claim 3, wherein a sealed diaphragm outer space is defined between the base mounting plate, the base and the base diaphragm on the base of the clamping transmitter, one end of the back-pumping pipe is communicated with the diaphragm outer space, and the other end of the back-pumping pipe is communicated with the back-pumping pump.
5. The quantitative oil filling method of a base diaphragm capsule of claim 4, wherein the displacement sensor is aligned to the center position of a base diaphragm on a base of the tight transmitter, a communication gap is arranged between the displacement sensor and the base, and the back suction pipe is communicated with the space outside the diaphragm through the communication gap.
6. A method of quantitatively filling a base bellows according to claim 3, wherein the base mounting plate is rotatably coupled to the main support shaft by a bearing structure.
7. A method of quantitatively filling a base bellows according to claim 3, wherein the base mount is detachably connected to the base mount plate by a threaded structure.
8. The quantitative oil filling method of the base diaphragm capsule according to claim 1 or 2, further comprising an oil filling pipeline system, wherein the oil filling pipeline system comprises a vacuum pump, a vacuum valve, a pre-pumping valve, an oil tank, an oil filling valve and an oil cylinder, one end of the vacuum valve is communicated with the vacuum pump, the other end of the vacuum valve is respectively communicated with one end of the pre-pumping valve and one end of the oil tank through a three-way pipe, the other end of the pre-pumping valve is communicated with an oil filling interface, the other end of the oil tank is communicated with the oil filling valve, the other end of the oil filling valve is respectively communicated with the oil filling interface and one end of the oil cylinder through a three-way pipe, and an oil sealing port on a base of an oil filling interface transmitter is communicated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111327676.8A CN114368723B (en) | 2021-11-10 | 2021-11-10 | Quantitative oil filling method for base diaphragm capsule |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111327676.8A CN114368723B (en) | 2021-11-10 | 2021-11-10 | Quantitative oil filling method for base diaphragm capsule |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114368723A CN114368723A (en) | 2022-04-19 |
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| CN214121486U (en) * | 2021-01-20 | 2021-09-03 | 深圳市特安电子有限公司 | Remote transmission differential pressure transmitter |
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| US6450369B1 (en) * | 1999-05-08 | 2002-09-17 | Imi Cornelius Inc. | Beverage dispenser |
| JP2005331385A (en) * | 2004-05-20 | 2005-12-02 | Yokogawa Electric Corp | Pressure transmitting apparatus and method of enclosing oil for transmitting pressure |
| CN201203805Y (en) * | 2008-05-16 | 2009-03-04 | 中国石油兰州石油化工公司 | Dosing device for measuring bellows pressure transmitting medium pouring amount using flange intelligent transmitter |
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| CN114368723A (en) | 2022-04-19 |
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