CN213022122U - Pressure transmitter calibration device - Google Patents
Pressure transmitter calibration device Download PDFInfo
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- CN213022122U CN213022122U CN202021764047.2U CN202021764047U CN213022122U CN 213022122 U CN213022122 U CN 213022122U CN 202021764047 U CN202021764047 U CN 202021764047U CN 213022122 U CN213022122 U CN 213022122U
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- pressure transmitter
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- extension sleeve
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Abstract
The utility model discloses a pressure transmitter calibration device, which belongs to the field of pressure gauge calibration, and comprises an extension sleeve which can be covered on an extension body of a flange type convex membrane pressure transmitter in a sealing way, wherein the inner wall of the extension sleeve is matched with the inner wall of the extension body in a sealing way, the height of the extension sleeve is greater than that of the extension body, and an inflation cavity is formed between the top of the extension sleeve and the top of the extension body; the extension sleeve is also provided with a gas generator for inflating the inflation cavity and a precise digital display pressure gauge for the air pressure of the inflation cavity. The utility model has simple structure and fast stamping, thereby greatly improving the testing efficiency; meanwhile, the test device is convenient to install when in need of testing, so that the whole testing process is greatly shortened, and the testing time is saved.
Description
Technical Field
The utility model belongs to manometer check-up field particularly, relates to a pressure transmitter calibration equipment.
Background
The pressure transmitter is an indispensable pressure detection means in the petrochemical industry, and according to the relevant national laws and regulations, the pressure transmitter needs to be periodically checked to ensure the accuracy and reliability of pressure measurement, so that the safety production and the product quality of enterprises are further ensured.
Most of existing pressure transmitter diaphragms are flat membranes, when the pressure transmitter is checked, a gasket is added between a flange of the pressure transmitter and a check flange, the flange is fastened and then pressurized for checking, but when the flange type convex membrane pressure transmitter is checked by the method, pressurization is slow, so that the whole checking process is labor-consuming and time-consuming.
In order to solve the problems, the pressure transmitter calibration structure is specially designed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a pressure transmitter calibration equipment to solve above-mentioned problem.
For realizing the purpose of the utility model, the technical proposal adopted is that: a pressure transmitter calibration device comprises an extension sleeve which can be covered on an extension body of a flange type convex membrane pressure transmitter in a sealing mode, the inner wall of the extension sleeve is matched with the inner wall of the extension body in a sealing mode, the height of the extension sleeve is larger than that of the extension body, and an inflation cavity is formed between the top of the extension sleeve and the top of the extension body; the extension sleeve is also provided with a gas generator for inflating the inflation cavity and a precise digital display pressure gauge for the air pressure of the inflation cavity.
Furthermore, the lower end of the extension sleeve is also provided with a butt-clamping flange.
Furthermore, a flange boss is further arranged on the butt clamp flange, and the extension sleeve is fixedly inserted into the flange boss.
Further, the flange boss is in threaded connection with the extension sleeve.
Furthermore, a gasket is arranged on the pressing surface of the butt clamp flange.
Furthermore, the inner wall of the extension sleeve is also provided with a rubber sleeve.
Further, the rubber sleeve is made of airtight rubber materials.
Furthermore, an inflation tube is connected to the extension sleeve, and an outlet of the gas generator is connected with an inlet end of the inflation tube.
Furthermore, a VCR joint is arranged on the extension sleeve, and the outlet end of the inflation tube is connected with the VCR joint.
Furthermore, an emptying pipe is connected to the inflation pipe in parallel, and a pressure release valve is installed on the emptying pipe.
The utility model has the advantages that,
the air is filled into the inflation cavity through the gas generator, the pressure intensity in the inflation cavity is gradually increased along with the filling of the air, so that the convex membrane diaphragm is deformed, at the moment, the numerical value of the gauge head of the pressure transmitter of the flange type convex membrane pressure transmitter is changed, the numerical value of the precision digital display pressure gauge is changed according to the pressure intensity in the inflation cavity, and finally, whether the pressure transmitter is qualified or not can be judged by comparing the reading on the gauge head of the pressure transmitter with the reading on the precision digital display pressure gauge.
The utility model has simple structure and fast stamping, thereby greatly improving the testing efficiency; meanwhile, the test device is convenient to install when in need of testing, so that the whole testing process is greatly shortened, and the testing time is saved.
Drawings
FIG. 1 is a block diagram of a prior art flange-type diaphragm pressure transmitter;
FIG. 2 is a diagram of the operation status of the pressure transmitter calibration apparatus provided by the present invention;
fig. 3 is a cross-sectional view a-a of fig. 2.
Reference numbers and corresponding part names in the drawings:
1. a gauge head of the pressure transmitter; 2. capillary, 3, transmitter flange, 4, transmitter extension body, 5, inflation cavity, 6, convex membrane diaphragm, 7, butt clamp flange, 8, fastening bolt, 9, flange boss, 10, extension sleeve, 11, rubber sleeve, 12, VCR joint, 13, stop valve, 14, precision digital display manometer, 15, inflation tube, 16, relief valve, 17, gas generator, 18, evacuation pipe, 19, gasket.
Detailed Description
The present invention will be described in further detail below with reference to specific embodiments and with reference to the accompanying drawings.
As shown in fig. 1, a flange-type convex membrane pressure transmitter in the prior art includes a cylindrical extension body 4, one end of the extension body 4 is sealed by a convex membrane diaphragm 6, and the other end of the extension body 4 is sealed by a transmitter flange 3; the inner side surface of the convex membrane diaphragm 6 is also connected with a capillary tube 2, the capillary tube 2 penetrates through the transmitter flange 3 and extends outwards, the other end of the capillary tube 2 is connected with a pressure transmitter gauge outfit 1, and in the using process, when the convex membrane diaphragm 6 deforms, the pressure transmitter gauge outfit 1 detects the deformation of the convex membrane diaphragm 6 through the capillary tube 2, so that the pressure of a detected object is obtained.
As shown in fig. 2 and 3, the utility model provides a pressure transmitter calibration device, including the extension sleeve 10 that can seal the cover and establish on flange formula convex membrane pressure transmitter's extension body 4, the one end of extension sleeve 10 is for opening the form, and the central axis of extension sleeve 10 and extension body 4 is on the collinear, when flange formula convex membrane pressure transmitter needs to detect, insert extension body 4 and establish in extension sleeve 10, extension sleeve 10 inner wall and the sealed cooperation of extension body 4 inner wall, make the air that enters into extension sleeve 10 can not pass through between extension sleeve 10 inner wall and the extension body 4; meanwhile, the height of the extension sleeve 10 is greater than that of the extension body 4, so that after the extension body 4 is inserted into the extension sleeve 10, a certain distance is reserved between the convex membrane 6 on the extension body 4 and the top of the extension sleeve 10, and an inflation cavity 5 is formed between the top of the extension sleeve 10 and the top of the extension body 4.
The extension sleeve 10 is also provided with a gas generator 17 for inflating the inflation cavity 5, the gas generator 17 is a compressor, a blower fan and the like, and is mainly used for inflating air into the inflation cavity 5 to change the pressure in the extension body 4, so that the convex membrane diaphragm 6 is deformed; and the extension sleeve 10 is also provided with a precision digital display pressure gauge 14 for measuring the air pressure of the inflation cavity 5, and the precision digital display pressure gauge 14 is used for detecting the pressure in the inflation cavity 5.
When the flange type convex membrane pressure transmitter needs to be detected, the extension body 4 on the flange type convex membrane pressure transmitter is directly inserted into the extension sleeve 10, the gas generator 17 fills air into the inflation cavity 5, the pressure in the inflation cavity 5 is gradually increased along with the filling of the air, so that the convex membrane diaphragm 6 is deformed, and the pressure intensity of the convex membrane diaphragm 6 detected by the gauge head 1 of the pressure transmitter is detected; meanwhile, in the process of filling air into the air filling cavity 5, the precision digital display pressure gauge 14 detects the pressure intensity in the air filling cavity 5 in real time; and finally, comparing the reading on the gauge head 1 of the pressure transmitter with the reading on the precision digital display pressure gauge 14, and when the reading on the gauge head 1 of the pressure transmitter is consistent with the reading on the precision digital display pressure gauge 14, the flange type convex membrane pressure transmitter is qualified.
Extend sleeve 10 lower extreme and still be equipped with and to pressing from both sides flange 7, press from both sides the terminal surface parallel and level that the face and the extension sleeve 10 opened the end to pressing from both sides flange 7, the shape to pressing from both sides flange 7, the size all with the shape of the protruding membrane pressure transmitter's of flange formula changer on transmitter flange 3, the size cooperation, after extension body 4 inserts in extending sleeve 10, it is fixed through fastening bolt 8 to press from both sides flange 7 and transmitter flange 3, make and extend sleeve 10 and extension body 4 fixed, not only make the end of opening of extending sleeve 10 sealed, and prevent effectively that gas generator 17 from when aerifing to aerifing chamber 5, because the increase of the internal gas pressure of aerifing chamber 5 and promote extension body 4 and remove, make flange formula protruding membrane pressure transmitter's detection precision higher.
It is fixed fastening bolt 8 that butt clamp flange 7 and changer flange 3 fasten is a plurality of, and a plurality of fastening bolt 8 are arranged along the even interval of circumferencial direction of butt clamp flange 7, not only make the connection of butt clamp flange 7 and changer flange 3 more firm, and make butt clamp flange 7 and changer flange 3 when compressing tightly, and the pressure that gasket 19 received is more balanced to the leakproofness between messenger butt clamp flange 7 and the changer flange 3 improves greatly.
The butt clamp flange 7 is also provided with a flange boss 9, the extension sleeve 10 is fixedly inserted in the flange boss 9, the flange boss 9 is a circular pipe pile, the flange boss 9 and the butt clamp flange 7 are in an integral structure, and the pressing surface of the flange boss 9 and the butt clamp flange 7 are flush; through set up flange boss 9 on the flange of will family, make the length increase of the hole on the flange 7 of vice clamp, make the end of opening of extending sleeve 10 after inserting flange boss 9, the linkage segment that extends sleeve 10 increases, makes extension sleeve 10 install on the flange 7 of vice clamp more firm.
Flange boss 9 passes through threaded connection with extension sleeve 10, offers the internal thread on the inner wall of flange boss 9 promptly, extend and offer on the sleeve 10 with internal thread complex external screw thread, extend sleeve 10 when the installation directly twist in the flange boss 9 can, make the installation and the dismantlement that extend sleeve 10 more convenient, make flange formula convex membrane pressure transmitter's test more convenient, make flange formula convex membrane pressure transmitter's efficiency of software testing improve greatly.
The pressing surface of the butt clamp flange 7 is also provided with a gasket 19, so that when the butt clamp flange 7 and the transmitter flange 3 are fixed, the gasket 19 is pressed between the butt clamp flange 7 and the transmitter flange 3, the butt clamp flange 7 and the transmitter flange 3 are connected and fixed, the sealing performance between the butt clamp flange 7 and the transmitter flange 3 is better, and the test of the flange type convex membrane pressure transmitter is more accurate.
The inner wall of the extension sleeve 10 is also provided with a rubber sleeve 11, and the rubber sleeve 11 has certain elasticity, so that after the extension body 4 is inserted into the extension sleeve 10, the rubber sleeve 11 uniformly covers the outer wall of the extension body 4, and the attaching effect between the outer wall of the extension body 4 and the inner wall of the extension sleeve 10 is better; meanwhile, the rubber sleeve 11 has a sealing effect, so that after the extension body 4 is inserted into the extension sleeve 10, a sealing layer is formed between the outer wall of the extension body 4 and the inner wall of the extension sleeve 10, and the sealing performance between the extension body 4 and the extension sleeve 10 is better.
Still be connected with gas tube 15 on the extension sleeve 10, gas tube 15 and the inside intercommunication of inflation chamber 5, gas generator 17 export and 15 entrance connection of gas tube, for the convenience to carry out the pressurize to inflation chamber 5 after aerifing, can install stop valve 13 at the entrance point of gas tube 15, prevent effectively that inflation chamber 5 from needing the direct entrance point of following gas tube 15 of air escape of inflation chamber 5 under the circumstances of pressurize.
The precision digital display pressure gauge 14 is arranged on the inflation pipe 15, after the inflation of the extension body 4 is completed, the precision digital display pressure gauge 14 can detect the pressure in the 15 paths of the inflation pipe, and the 15 paths of the inflation pipe are communicated with the interior of the extension body 4, so that the pressure detected by the precision digital display pressure gauge 14 is the pressure after the inflation in the body pressing body, and the damage to the extension sleeve 10 caused by the installation of the precision digital display pressure gauge 14 is effectively avoided; meanwhile, in order to make the installation of the precision digital display pressure gauge 14 more spacious, a branch pipe can be connected in parallel to the gas filling pipe 15, and the precision digital display pressure gauge 14 is installed on the branch pipe.
The extension sleeve 10 is further provided with a VCR connector 12, the VCR connector 12 and the extension sleeve 10 are of an integral structure, and the outlet end of the inflation tube 15 is connected with the VCR connector 12, so that the extension sleeve 10 and the inflation tube 15 are more conveniently connected.
The air charging pipe 15 is also connected with an emptying pipe 18 in parallel, the emptying pipe 18 is communicated with the air charging pipe 15, the emptying pipe 18 is also provided with a pressure release valve 16, and the pressure release valve 16 is mainly used for discharging air in the air charging cavity 5 after the flange type convex membrane pressure transmitter is tested, so that the next test of the flange type convex membrane pressure transmitter is prepared.
When the flange type convex membrane pressure transmitter needs to be tested, the extension body 4 on the flange type convex membrane pressure transmitter is inserted into the extension sleeve 10, the butt-joint flange 7 is in butt joint with the transmitter flange 3, at the moment, the butt-joint flange 7 and the transmitter flange 3 are locked and fixed through the fastening bolt 8, the open end of the extension sleeve 10 is sealed, then the gas generator 17 acts, the gas generator 17 inflates the inflation cavity 5 through the inflation pipe 15, the pressure in the inflation cavity 5 is gradually increased, after the inflation cavity 5 is inflated, the gas generator 17 stops acting, the stop valve 13 at the inlet end of the inflation pipe 15 is closed, the pressure in the inflation cavity 5 is maintained, and the pressure in the inflation cavity 5 detected by the precision digital display pressure gauge 14 is gradually kept stable.
Meanwhile, when the gas generator 17 inflates the inflation cavity 5, the pressure intensity in the inflation cavity 5 acts on the convex membrane diaphragm 6 on the flange type convex membrane pressure transmitter to deform the convex membrane diaphragm 6, so that the reading on the gauge head 1 of the pressure transmitter is changed, when the inflation cavity 5 is in pressure maintaining action, the convex membrane diaphragm 6 stops continuously deforming, and at the moment, the reading of the gauge head 1 of the pressure transmitter is gradually kept unchanged.
And finally, comparing the reading of the gauge head 1 of the pressure transmitter with the reading of the precision digital display pressure gauge 14, wherein if the readings of the gauge head and the reading of the precision digital display pressure gauge are the same, the flange type convex membrane pressure transmitter is qualified, and if the readings of the gauge head and the reading of the precision digital display pressure gauge are different, the flange type convex membrane pressure transmitter is unqualified.
After the flange type convex membrane pressure transmitter finishes detection, the pressure release valve 16 on the emptying pipe 18 is opened, air in the inflation cavity 5 is discharged, normal pressure is kept in the inflation cavity 5, then the fastening bolt 8 is loosened, the butt clamp flange 7 and the transmitter flange 3 are loosened, and finally the extension body 4 is taken out of the extension sleeve 10.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The pressure transmitter calibration device is characterized by comprising an extension sleeve (10) which is covered on an extension body (4) of a flange type convex membrane pressure transmitter in a sealing manner, wherein the inner wall of the extension sleeve (10) is in sealing fit with the inner wall of the extension body (4), the height of the extension sleeve (10) is greater than that of the extension body (4), and an inflation cavity (5) is formed between the top of the extension sleeve (10) and the top of the extension body (4); the extension sleeve (10) is also provided with a gas generator (17) used for inflating the inflation cavity (5) and a precise digital display pressure gauge (14) used for the air pressure of the inflation cavity (5).
2. Pressure transmitter verification device according to claim 1, characterized in that the lower end of the extension sleeve (10) is further provided with a counter clamping flange (7).
3. The pressure transmitter verifying unit of claim 2, wherein the opposite clamping flange (7) is further provided with a flange boss (9), and the extension sleeve (10) is fixedly inserted in the flange boss (9).
4. Pressure transmitter verification device according to claim 3, characterized in that the flange boss (9) is screwed with the extension sleeve (10).
5. Pressure transmitter checking device according to claim 2, characterized in that the pressing surface of the counter clamp flange (7) is further provided with a gasket (19).
6. Pressure transmitter checking device according to claim 1, characterized in that the inner wall of the extension sleeve (10) is further provided with a rubber sleeve (11).
7. Pressure transmitter checking device according to claim 6, characterized in that said rubber sleeve (11) is a rubber sleeve (11) made of a gas-impermeable rubber material.
8. The pressure transmitter verifying device of claim 1, wherein an inflation tube (15) is further connected to the extension sleeve (10), and an outlet of the gas generator (17) is connected with an inlet end of the inflation tube (15).
9. Pressure transmitter calibrating device according to claim 8, characterized in that the extension sleeve (10) is further provided with a VCR connection (12) and that the outlet end of the inflation tube (15) is connected to the VCR connection (12).
10. The pressure transmitter checking device according to claim 8 or 9, wherein an emptying pipe (18) is further connected in parallel to the gas filling pipe (15), and a pressure relief valve (16) is further installed on the emptying pipe (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021764047.2U CN213022122U (en) | 2020-08-21 | 2020-08-21 | Pressure transmitter calibration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021764047.2U CN213022122U (en) | 2020-08-21 | 2020-08-21 | Pressure transmitter calibration device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213022122U true CN213022122U (en) | 2021-04-20 |
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ID=75467932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021764047.2U Active CN213022122U (en) | 2020-08-21 | 2020-08-21 | Pressure transmitter calibration device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213022122U (en) |
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2020
- 2020-08-21 CN CN202021764047.2U patent/CN213022122U/en active Active
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