Flange differential pressure transmitter field calibration tool

Abstract

The utility model relates to a flange differential pressure transmitter on-site calibration tool comprising a base plate, the top of the base plate is provided with a pressure pump, the pressure pump is connected with a pressure gauge, the output end of the pressure pump is communicated with a flexible pipe, one end of the flexible pipe far away from the pressure pump is connected with a companion flange, and the companion flange is connected with a transmitter flange through a bolt and a nut. A groove and a first sealing ring are arranged on the side, close to the transmitter flange, of the companion flange, the first sealing ring surrounds the periphery of an opening of the groove, the groove is matched with an induction diaphragm of the transmitter flange, the groove is communicated with the end, away from the pressurizing pump, of the hose, and self-locking universal wheels are arranged on the periphery of the bottom of the bottom plate. According to the utility model, during verification, the differential pressure transmitter can be verified on a construction site only by disassembling the transmitter flange, and the flange differential pressure transmitter does not need to be transported back to a plant for verification, so that time is saved, the construction progress is accelerated, and the construction efficiency is improved. And the condition that the capillary tube is abraded due to transportation of the flange differential pressure transmitter can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of flange differential pressure transmitter calibration, in particular to an on-site calibration tool for a flange differential pressure transmitter. Background Art

[0002] There is currently no unified calibration equipment for the calibration of single-flange differential pressure transmitters or double-flange differential pressure transmitters on site. The common calibration method is to dismantle the differential pressure transmitter and then transport it back to the factory, and use special calibration equipment to dock with the transmitter flange of the differential pressure transmitter and perform calibration. However, this calibration method requires dismantling the entire flange differential pressure transmitter and transporting the flange differential pressure transmitter back to the factory for calibration. This process is time-consuming and affects the construction progress, and the capillary of the flange differential pressure transmitter is easily worn during transportation. Utility Model Content

[0003] The purpose of the utility model is to design an on-site calibration tool for a flange differential pressure transmitter, so as to solve the problems mentioned in the background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A field calibration tool for a flange differential pressure transmitter comprises a base plate, a pressure pump is placed on the top of the base plate, the pressure pump is connected to a pressure gauge, the output end of the pressure pump is connected to a hose, the end of the hose away from the pressure pump is connected to a matching flange, the matching flange is connected to the transmitter flange through bolts and nuts, a groove and a first sealing ring are provided on the side of the matching flange close to the transmitter flange, the first sealing ring surrounds the opening of the groove, the groove is adapted to the sensing diaphragm of the transmitter flange, the groove is connected to the end of the hose away from the pressure pump, and self-locking universal wheels are provided around the bottom of the base plate.

[0006] Furthermore, two pressure pumps are provided.

[0007] Furthermore, the pressure pump is an air pump or an oil pump.

[0008] Furthermore, a side of the matching flange close to the hose is connected to a secondary connecting pipe connected to the groove, and an end of the hose away from the pressure pump is connected to a main connecting pipe, and the main connecting pipe and the secondary connecting pipe are detachably connected.

[0009] Furthermore, a plurality of main connecting blocks are distributed circumferentially on the outer wall of the main connecting tube, the main connecting blocks are provided with main screw holes, and the outer wall of the secondary connecting tube is provided with secondary connecting blocks corresponding to the main connecting blocks one by one, the secondary connecting blocks are provided with secondary screw holes aligned with the main screw holes, and the main screw holes and the secondary screw holes are connected by screws.

[0010] Furthermore, a second sealing ring is provided on a side of the main connecting pipe close to the auxiliary connecting pipe, and a sealing groove adapted to the second sealing ring is provided on the inner wall of the auxiliary connecting pipe.

[0011] Furthermore, a surrounding baffle is provided on the top of the bottom plate.

[0012] Furthermore, a push rod is provided on the outer wall of the bottom plate.

[0013] The beneficial effects of the utility model are:

[0014] When calibrating, there is no need to dismantle the entire flange differential pressure transmitter. You only need to dismantle the transmitter flange and connect the transmitter flange to the matching flange. Use a pressure pump to inject pressure medium into the groove so that the sensing diaphragm of the transmitter flange senses the pressure brought by the pressure medium. The differential pressure transmitter is calibrated according to the reading of the pressure gauge. The differential pressure transmitter can be calibrated at the construction site. There is no need to transport the flange differential pressure transmitter back to the factory for calibration, which saves time, speeds up the construction progress, and avoids the wear of the flange differential pressure transmitter due to capillary due to transportation.

[0015] By setting up a base plate and self-locking universal wheels, the tooling can be easily moved to the construction site for inspection, increasing practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is a schematic diagram of the structure of the utility model for calibrating a double flange differential pressure transmitter;

[0018] Figure 2 It is a cross-sectional view of the connection between the matching flange and the transmitter flange in the utility model;

[0019] Figure 3 It is an exploded view of the connection between the matching flange and the main connecting pipe in the utility model;

[0020] Figure 4 for Figure 3 Schematic diagram of the structure from another perspective.

[0021] The names of the components marked in the figure are as follows:

[0022] 1. Base plate; 2. Pressure pump; 3. Pressure gauge; 4. Hose; 5. Matching flange; 6. Bolts; 7. Nuts; 8. Groove; 9. First sealing ring; 10. Self-locking universal wheel; 11. Secondary connecting pipe; 12. Main connecting pipe; 13. Main screw hole; 14. Secondary screw hole; 15. Screw; 16. Secondary sealing ring; 17. Sealing groove; 18. Baffle; 19. Push rod; 20. Transmitter flange; 21. Induction diaphragm. DETAILED DESCRIPTION

[0023] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0024] like Figure 1-4 As shown, a flange differential pressure transmitter on-site calibration tool comprises a base plate 1, on the top of which are placed two pressure pumps 2, which are air pumps or oil pumps and can be selected according to the pressure measurement size of the flange differential pressure transmitter to be calibrated, thereby improving the calibration accuracy; the pressure pump 2 is connected to a pressure gauge 3 for displaying the pressure value output by the pressure pump 2; the output end of the pressure pump 2 is connected to a hose 4, and the end of the hose 4 away from the pressure pump 2 is connected to a matching flange 5, and the matching flange 5 is connected to the transmitter flange 20 through bolts 6 and nuts 7, and a groove 8 and a first sealing ring 9 are provided on the side of the matching flange 5 close to the transmitter flange 20, and the first sealing ring 9 surrounds the opening of the groove 8 to enhance the sealing effect between the matching flange 5 and the transmitter flange 20; the groove 8 is adapted to the sensing diaphragm 21 of the transmitter flange 20, and after the matching flange 5 is connected to the transmitter flange 20, the groove 8 can form a sealed cavity;

[0025] A secondary connecting pipe 11 connected to the groove 8 is connected to the side of the matching flange 5 close to the hose 4, and a main connecting pipe 12 is connected to the end of the hose 4 away from the pressure pump 2. A plurality of main connecting blocks are distributed circumferentially on the outer wall of the main connecting pipe 12, and a main screw hole 13 is provided on the main connecting block. A secondary connecting block corresponding to the main connecting block is provided on the outer wall of the secondary connecting pipe 11, and a secondary screw hole 14 aligned with the main screw hole 13 is provided on the secondary connecting block. The main screw hole 13 and the secondary screw hole 14 are connected by screws 15, so that the connection between the hose 4 and the matching flange 5 is a detachable structure, which is convenient for storing or replacing the matching flange 5; a second sealing ring 16 is provided on the side of the main connecting pipe 12 close to the secondary connecting pipe 11, and a sealing groove 17 adapted to the second sealing ring 16 is provided on the inner wall of the secondary connecting pipe 11. The second sealing ring 16 can enhance the sealing effect between the main connecting pipe 12 and the secondary connecting pipe 11, and the sealing effect can be further enhanced after the outer wall of the second sealing ring 16 is squeezed with the inner wall of the sealing groove 17;

[0026] Self-locking universal wheels 10 are provided around the bottom of the base plate 1 to facilitate the movement of the tooling; a surrounding baffle 18 is provided on the top of the base plate 1 to prevent the parts placed on the base plate 1 from falling; a push rod 19 is provided on the outer wall of the base plate 1 to facilitate pushing the base plate 1 to move.

[0027] Working principle:

[0028] like Figure 1-4 As shown, when it is necessary to calibrate the double flange differential pressure transmitter at the construction site, the base plate 1 is pushed to move to the construction site by pushing the push rod 19. A pressure pump 2, a hose 4, a matching flange 5, bolts 6, nuts 7 and screws 15 are placed on the base plate 1. First, the main connecting pipe 12 of the hose 4 is connected to the secondary connecting pipe 11 of the matching flange 5 through the screws 15, and then the groove 8 of the matching flange 5 is aligned with the sensing diaphragm 21 of the transmitter flange 20 and docked with the transmitter flange 20. After that, the connection between the matching flange 5 and the transmitter flange 20 is completed by bolts 6 and nuts 7. After both transmitter flanges 20 of the double flange differential pressure transmitter are connected to the matching flange 5, the two pressure pumps 2 can be pressured and output, and gas or liquid is pumped into the groove 8 by the pressure pump 2, so that the sensing diaphragm 21 of the transmitter flange senses the pressure brought by the body or liquid, and the difference between the readings of the two pressure gauges 3 is compared with the value displayed on the instrument head of the differential pressure transmitter, so as to perform calibration.

[0029] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A flange differential pressure transmitter on-site calibration tool, comprising a base plate (1), characterized in that: A pressure pump (2) is placed on the top of the base plate (1). The pressure pump (2) is connected to a pressure gauge (3). The output end of the pressure pump (2) is connected to a hose (4). The end of the hose (4) away from the pressure pump (2) is connected to a matching flange (5). The matching flange (5) is connected to a transmitter flange (20) through bolts (6) and nuts (7). A groove (8) and a first sealing ring (9) are provided on the side of the matching flange (5) close to the transmitter flange (20). The first sealing ring (9) surrounds the opening of the groove (8). The groove (8) is adapted to the sensing diaphragm (21) of the transmitter flange (20). The groove (8) is connected to the end of the hose (4) away from the pressure pump (2). Self-locking universal wheels (10) are provided around the bottom of the base plate (1).

2. The flange differential pressure transmitter on-site calibration tool according to claim 1 is characterized in that: Two pressure pumps (2) are provided.

3. The on-site calibration tool for flange differential pressure transmitter according to claim 1 is characterized in that: The pressure pump (2) is an air pump or an oil pump.

4. The on-site verification tool for flange differential pressure transmitter according to claim 1 is characterized in that: The side of the matching flange (5) close to the hose (4) is connected to a secondary connecting pipe (11) connected to the groove (8), and the end of the hose (4) away from the pressure pump (2) is connected to a main connecting pipe (12). The main connecting pipe (12) and the secondary connecting pipe (11) are detachably connected.

5. The on-site verification tool for flange differential pressure transmitter according to claim 4 is characterized in that: A plurality of main connection blocks are circumferentially distributed on the outer wall of the main connection pipe (12), and the main connection blocks are provided with main screw holes (13). The outer wall of the secondary connection pipe (11) is provided with secondary connection blocks corresponding to the main connection blocks one by one, and the secondary connection blocks are provided with secondary screw holes (14) aligned with the main screw holes (13). The main screw holes (13) and the secondary screw holes (14) are connected by screws (15).

6. The on-site verification tool for flange differential pressure transmitter according to claim 5 is characterized in that: A second sealing ring (16) is provided on one side of the main connecting pipe (12) close to the auxiliary connecting pipe (11), and a sealing groove (17) adapted to the second sealing ring (16) is provided on the inner wall of the auxiliary connecting pipe (11).

7. The on-site verification tool for flange differential pressure transmitter according to claim 1 is characterized in that: A surrounding baffle (18) is provided on the top of the bottom plate (1).

8. The on-site verification tool for flange differential pressure transmitter according to claim 1 is characterized in that: A push rod (19) is provided on the outer wall of the bottom plate (1).

Images