A hydraulic automatic locking device and locking method for detecting a union pressure transmitter

Abstract

The present invention proposes a hydraulic automatic locking device for detecting a union-type pressure transmitter, comprising: a bracket, in which a working pressure connecting pipe, a pressure standard, a pressure gauge, a manual hydraulic pump and a mounting seat for an instrument to be inspected are arranged, and a hydraulic locking interface and a working pressure interface are arranged on the mounting seat for the instrument to be inspected; one end of the working pressure connecting pipe is connected to a pressure generating device, and the other end is connected to the working pressure interface and the pressure standard of the mounting seat for the instrument to be inspected through a plurality of branch pipelines; the outlet of the manual hydraulic pump is connected to the pressure gauge and the hydraulic locking interface in the mounting seat for the instrument to be inspected through a hydraulic pipeline. The present invention also proposes a method for detecting a hydraulic automatic locking device for detecting a union-type pressure transmitter, which is implemented by using the above-mentioned union-type pressure transmitter to detect a hydraulic automatic locking device.

Description

Technical Field

[0001] The invention belongs to the field of union type pressure transmitter detection devices, and in particular relates to a union type pressure transmitter detection hydraulic automatic locking device and a locking method thereof. Background Art

[0002] The union pressure transmitter is difficult to load and unload during calibration. Due to its size, a customized sleeve tool must be used during calibration to lock the pressure transmitter by rotating and hammering the sleeve. Long-term hammering will affect the stability of the device, which is unsafe and inconvenient. For this reason, a union pressure transmitter detection device with a hydraulic automatic locking device is designed to simplify the installation of the union pressure transmitter through hydraulic locking. Summary of the invention

[0003] In view of this, an object of the present invention is to provide a union-type pressure transmitter to detect a hydraulic automatic locking device and a locking method thereof, so as to overcome the above problems or at least partially solve or alleviate the above problems.

[0004] A union type pressure transmitter detects a hydraulic automatic locking device, comprising:

[0005] A bracket, wherein a working pressure connecting pipe, a pressure standard, a pressure gauge, a manual hydraulic pump and a mounting seat for the instrument to be inspected are arranged in the bracket, and a hydraulic locking interface and a working pressure interface are arranged on the mounting seat for the instrument to be inspected;

[0006] One end of the working pressure connecting pipe is connected to the pressure generating device, and the other end is connected to the working pressure interface and the pressure standard of the mounting seat of the instrument to be tested respectively through a plurality of branch pipelines;

[0007] The outlet of the manual hydraulic pump is connected to the pressure gauge and the hydraulic locking interface in the mounting seat of the instrument to be inspected through a hydraulic pipeline.

[0008] The present invention also has the following optional features.

[0009] Optionally, a pressure relief valve is further included, and the pressure relief valve is connected to the working pressure connecting pipe.

[0010] Optionally, it also includes a pressure-stabilizing stop valve, one end of which is connected to the outlet of the manual hydraulic pump through a pipeline, and the other end of which is connected to the hydraulic locking interface in the mounting base of the instrument under test through a pipeline.

[0011] Optionally, a liquid return stop valve is further included, and the liquid return stop valve is connected to the back pressure pipeline of the manual hydraulic pump.

[0012] Optionally, the installation base of the instrument under inspection includes:

[0013] A detection base, the detection base is fixed on the bracket, a first pressure channel is provided in the middle of the detection base, and a lower end of the first pressure channel is connected to the working pressure interface;

[0014] A piston seat, wherein a piston rod is disposed at the lower part of the piston seat, wherein the lower end of the piston rod is threadedly connected to the upper port of the pressure channel in the detection base, and a second pressure channel is disposed in the piston seat, and the second pressure channel is connected to the first pressure channel;

[0015] A piston cylinder, the upper end of which is open, the piston cylinder is sleeved on the outer side of the piston seat, the piston cylinder and the piston rod are slidably sealed, a hydraulic locking channel is provided on the piston cylinder, the outer end of the hydraulic locking channel is connected to the hydraulic locking interface, and the inner end of the hydraulic locking channel leads to between the lower side of the piston seat and the inner end of the piston cylinder;

[0016] A fixed flange, the fixed flange is connected to the upper end of the piston cylinder, and a plurality of L-shaped grooves are circularly symmetrically arranged on the inner side wall of the fixed flange;

[0017] A limiting ring, wherein the outer periphery of the lower end of the limiting ring is provided with a plurality of clamping edges, and each of the clamping edges cooperates with one of the L-shaped grooves.

[0018] Optionally, a disc spring is provided between the piston cylinder and the detection base.

[0019] Optionally, an annular sealing ring is arranged in the upper port of the second pressure channel in the piston seat.

[0020] The present invention also proposes a method for detecting hydraulic automatic locking by a union type pressure transmitter, which is implemented by using the union type pressure transmitter to detect the hydraulic automatic locking device described above, and includes the following steps:

[0021] S001: Place the pressure transmitter into the fixed flange and tighten the upper limit ring;

[0022] S002: Open the pressure-stabilizing stop valve and close the liquid return stop valve;

[0023] S003: Operate the manual hydraulic pump to pressurize the hydraulic locking interface, so that the mounting seat of the instrument under test is locked to the pressure transmitter under test, and then close the pressure stabilizing stop valve;

[0024] S004: After the pressure transmitter is calibrated, first open the pressure relief valve to reduce the working pressure to zero, then open the pressure stabilizing stop valve, and then open the liquid return stop valve to make the pressure indication zero;

[0025] S005: Open the limit ring and take out the limit ring and pressure transmitter.

[0026] The hydraulic automatic locking device for detecting a union-type pressure transmitter of the present invention and the testing method thereof introduce hydraulic oil into the hydraulic locking interface of the mounting seat of the instrument to be tested by a manual hydraulic pump, so that the mounting seat of the instrument to be tested performs hydraulic automatic locking on the pressure transmitter, and then connects the working pressure generating device through the working pressure connecting pipe to introduce the working pressure into the mounting seat of the instrument to be tested, and provides pressure to the pressure transmitter and the pressure standard, thereby testing the pressure transmitter. The hydraulic automatic locking device for detecting a union-type pressure transmitter of the present invention and the testing method thereof do not require striking the sleeve for locking, will not affect the stability of the device, and are safe and convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural diagram of an embodiment of the present invention in which a union-type pressure transmitter detects a hydraulic automatic locking device;

[0028] Figure 2 yes Figure 1 A schematic diagram of the full cross-section structure of the mounting base of the instrument under test;

[0029] Figure 3 hour Figure 2 Top view of the mounting base of the instrument under test.

[0030] In the above figure: 1 bracket; 2 working pressure connecting pipe; 3 pressure standard; 4 manual hydraulic pump; 5 tested instrument mounting base; 501 hydraulic locking interface; 502 working pressure interface; 503 detection base; 504 piston seat; 505 piston rod; 506 piston cylinder; 507 fixing flange; 508 L-shaped groove; 509 limit ring; 510 clamping edge; 511 butterfly spring; 512 annular sealing ring; 6 pressure relief valve; 7 pressure stabilizing stop valve; 8 return liquid stop valve; 9 pressure transmitter; 10 pressure gauge.

[0031] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0032] Example 1

[0033] refer to Figure 1An embodiment of the present invention proposes a hydraulic automatic locking device for detecting a union type pressure transmitter, comprising: a bracket 1, wherein the bracket 1 is provided with a working pressure connecting pipe 2, a pressure standard 3, a pressure gauge 10, a manual hydraulic pump 4 and a tested instrument mounting seat 5, wherein the tested instrument mounting seat 5 is provided with a hydraulic locking interface 501 and a working pressure interface 502; one end of the working pressure connecting pipe 2 is connected to a pressure generating device, and the other end is connected to the working pressure interface 502 and the pressure standard 3 of the tested instrument mounting seat 5 through a plurality of branch pipelines; the outlet of the manual hydraulic pump 4 is connected to the pressure gauge 10 and the hydraulic locking interface 501 in the tested instrument mounting seat 5 through a hydraulic pipeline.

[0034] When in use, place the pressure transmitter 9 in the mounting seat 5 of the instrument to be inspected, then pressurize the hydraulic locking interface 501 of the mounting seat 5 of the instrument to be inspected through the manual hydraulic pump 4, and determine the locking pressure through the pressure gauge 10; then make the pressure generating device pass the hydraulic oil of determined pressure to the pressure standard 3 and the working pressure interface 502 on the mounting seat 5 of the instrument to be inspected through the working pressure connecting pipe 2, and check whether the pressure transmitter 9 is accurate by comparing the pressure detection values ​​of the pressure standard 3 and the pressure transmitter 9.

[0035] Example 2

[0036] refer to Figure 1 On the basis of Example 1, it further includes a pressure relief valve 6 , and the pressure relief valve 6 is connected to the working pressure connecting pipe 2 .

[0037] The pressure relief valve 6 can release the pressure in the working pressure connecting pipe 2, making it convenient for the tester to fix or remove the pressure transmitter 9 on the mounting base 5 of the instrument under test.

[0038] Example 3

[0039] refer to Figure 1 On the basis of Example 1, it also includes a pressure-stabilizing stop valve 7, one end of the pressure-stabilizing stop valve 7 is connected to the outlet of the manual hydraulic pump 4 through a pipeline, and the other end of the pressure-stabilizing stop valve 7 is connected to the hydraulic locking interface 501 in the inspected instrument mounting base 5 through a pipeline.

[0040] The pressure-stabilizing stop valve 7 can keep the pressure behind the valve within a certain range, protecting other equipment on the pressure pipeline behind the valve from being damaged. The pressure-stabilizing stop valve 7 plays a cut-off role after being closed.

[0041] Example 4

[0042] refer to Figure 1 On the basis of Example 1, it further includes a liquid return stop valve 8, and the liquid return stop valve 8 is connected to the back pressure pipeline of the manual hydraulic pump 4.

[0043] After the liquid return stop valve 8 is closed, the manual hydraulic pump 4 can pump hydraulic oil into the hydraulic locking interface 501 to provide locking pressure. When the liquid return stop valve 8 is opened, the hydraulic oil flows back and the pressure in the hydraulic locking interface 501 disappears.

[0044] Example 5

[0045] refer to Figure 2 On the basis of Example 1, the tested instrument mounting base 5 includes: a detection base 503, a piston seat 504, a piston cylinder 506, a fixing flange 507 and a limiting ring 509; the detection base 503 is fixed on the bracket 1, and a first pressure channel is arranged in the middle of the detection base 503, and the lower end of the first pressure channel is connected to the working pressure interface 502; a piston rod 505 is arranged at the lower part of the piston seat 504, and the lower end of the piston rod 505 is connected to the upper port of the pressure channel in the detection base 503 through a thread, and a second pressure channel is arranged in the piston seat 504, and the second pressure channel is connected to the first pressure channel; the upper end of the piston cylinder 506 The piston cylinder 506 is sleeved on the outer side of the piston seat 504, and the piston cylinder 506 and the piston rod 505 are slidably sealed. A hydraulic locking channel is provided on the piston cylinder 506, and the outer end of the hydraulic locking channel is connected to the hydraulic locking interface 501, and the inner end of the hydraulic locking channel leads to between the lower side of the piston seat 504 and the inner end of the piston cylinder 506; the fixing flange 507 is connected to the upper port of the piston cylinder 506, and a plurality of L-shaped grooves 508 are circularly symmetrically provided on the inner side wall of the fixing flange 507; a plurality of clamping edges 510 are provided on the outer periphery of the lower end of the limiting ring 509, and each of the clamping edges 510 is matched with one of the L-shaped grooves 508.

[0046] The hydraulic oil output by the manual hydraulic pump 4 enters between the piston seat 504 and the inner end of the piston cylinder 506 through the hydraulic locking interface 501 and the hydraulic locking channel, which can push the piston cylinder 506 to move downward, and then the fixed flange 507 connected to the upper end of the piston cylinder 506 squeezes the limit ring 509 downward, thereby hydraulically locking the pressure transmitter 9 placed on the piston seat 504.

[0047] Among them, the diameter of the pressure transmitter 9 is smaller than the inner diameter of the piston cylinder 506. After the pressure transmitter 9 is placed on the piston seat 504 in the piston cylinder 506, the limiting ring 509 is then placed in the fixed flange 507. When lowering, the clamping edge 510 on the limiting ring 509 is lowered to the bottom along the vertical section of the L-shaped groove 508 on the inner wall of the fixed flange 507, and then the limiting ring 509 is twisted horizontally so that the clamping edge 510 is clamped into the horizontal section of the L-shaped groove 508.

[0048] Example 6

[0049] refer to Figure 3 On the basis of any of the above embodiments, a disc spring 511 is provided between the piston cylinder 506 and the detection base 503 .

[0050] The butterfly spring 511 surrounds the outside of the piston rod 505 and is fixed between the piston cylinder 506 and the detection base 503 to support the piston cylinder 506 and pre-tighten the connection between the lower end of the piston rod 505 and the detection base 503.

[0051] Example 7

[0052] refer to Figure 1 On the basis of Example 1, an annular sealing ring 512 is provided in the upper port of the second pressure channel in the piston seat 504 .

[0053] The upper port of the second pressure channel is provided with a countersunk hole, and an annular sealing ring 512 is provided in the countersunk hole. After the lower part of the pressure transmitter 9 contacts the upper part of the piston seat 504 and is hydraulically locked, the hydraulic oil in the working pressure connecting pipe 2 enters the second pressure channel and the countersunk hole to perform pressure detection on the pressure transmitter 9. The annular sealing ring 512 can prevent the hydraulic oil in the second pressure channel from leaking from the edge of the countersunk hole.

[0054] Example 8

[0055] refer to Figure 1 , Figure 2 and Figure 3 The implementation of the present invention also proposes a method for detecting a hydraulic automatic locking of a union type pressure transmitter, which is implemented by using the union type pressure transmitter detection hydraulic automatic locking device described in any of the above embodiments, and includes the following steps: S001: placing the pressure transmitter 9 in the fixed flange 507, and then tightening the limit ring 509; S002: opening the pressure stabilizing stop valve 7, and closing the liquid return stop valve 8; S003: operating the manual hydraulic pump 4 to pressurize the hydraulic locking interface 501, so that the pressure transmitter 9 is locked after the installation seat 5 of the instrument to be inspected is closed; S004: after the pressure transmitter calibration work is performed, first open the pressure relief valve 6 to unload the working pressure to zero, open the pressure stabilizing stop valve 7, and then open the liquid return stop valve 8 to make the pressure gauge 10 read zero; S005: open the limit ring 509, and take out the limit ring 509 and the pressure transmitter 9.

[0056] In S001, first place the pressure transmitter 9 and the limit ring 509 into the piston cylinder 506 and the fixed flange 507 of the mounting seat 5 of the instrument to be inspected according to the markings, and screw the clamping edge 510 on the limit ring 509 into the horizontal section of the L-shaped groove 508 on the inner side of the fixed flange 507, that is, rotate until it reaches the marked point "off" position and cannot be rotated any further; in S002, open the pressure-stabilizing stop valve 7 counterclockwise, and then close the return liquid stop valve 8 clockwise; in S003, operate the pressure rod of the manual hydraulic pump 4 until the pressure gauge 10 shows a reading between 30MPa and 50MPa, and then rotate clockwise. Close the pressure-stabilizing stop valve 7 and the pressure transmitter calibration can be carried out; in S004, first open the pressure relief valve 6 to reduce the working pressure to zero, then open the pressure-stabilizing stop valve 7 counterclockwise, and then open the liquid return stop valve 8 counterclockwise to make the indication of the pressure gauge 10 zero; in S005, rotate the limit ring 509 counterclockwise to the marked point "open" position, that is, screw the clamping edge 510 on the limit ring 509 to the straight section of the L-shaped groove 508, then remove the limit ring 509 from the fixed flange 507, and then remove the pressure transmitter 9 from the piston cylinder 506 to complete the calibration.

[0057] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims. The components and structures not described in detail in this embodiment are well-known components and common structures or common means in the industry, and are not described here one by one.

Claims

1. A hydraulic automatic locking device for detecting a union pressure transmitter, characterized in that: include: A support (1), wherein the support (1) is provided with a working pressure connecting pipe (2), a pressure standard (3), a pressure gauge (10), a manual hydraulic pump (4) and a mounting seat (5) for an instrument to be inspected, and the mounting seat (5) for the instrument to be inspected is provided with a hydraulic locking interface (501) and a working pressure interface (502); One end of the working pressure connecting pipe (2) is connected to the pressure generating device, and the other end is respectively connected to the working pressure interface (502) of the tested instrument mounting seat (5) and the pressure standard (3) through a plurality of branch pipelines; The outlet of the manual hydraulic pump (4) is connected to the pressure gauge (10) and the hydraulic locking interface (501) in the test instrument mounting seat (5) through a hydraulic pipeline; The tested instrument mounting base (5) comprises: A detection base (503), the detection base (503) being fixed on the bracket (1), a first pressure channel being provided in the middle of the detection base (503), and a lower end of the first pressure channel being connected to the working pressure interface (502); A piston seat (504), wherein a piston rod (505) is disposed at the lower portion of the piston seat (504), wherein the lower end of the piston rod (505) is connected to the upper port of the pressure channel in the detection base (503) via a thread, and a second pressure channel is disposed in the piston seat (504), wherein the second pressure channel is connected to the first pressure channel; A piston cylinder (506), the upper end of the piston cylinder (506) is open, the piston cylinder (506) is sleeved on the outer side of the piston seat (504), the piston cylinder (506) and the piston rod (505) are slidingly sealed, a hydraulic locking channel is provided on the piston cylinder (506), the outer end of the hydraulic locking channel is connected to the hydraulic locking interface (501), and the inner end of the hydraulic locking channel leads to between the lower side of the piston seat (504) and the inner end of the piston cylinder (506); A fixed flange (507), the fixed flange (507) being connected to the upper end of the piston cylinder (506), and a plurality of L-shaped grooves (508) being circularly symmetrically arranged on the inner side wall of the fixed flange (507); A limiting ring (509), wherein the outer periphery of the lower end of the limiting ring (509) is provided with a plurality of clamping edges (510), and each of the clamping edges (510) is matched with one of the L-shaped grooves (508).

2. The hydraulic automatic locking device for detecting a union type pressure transmitter according to claim 1, characterized in that: It also comprises a pressure relief valve (6), wherein the pressure relief valve (6) is connected to the working pressure connecting pipe (2).

3. The hydraulic automatic locking device for detecting a union type pressure transmitter according to claim 1, characterized in that: It also includes a pressure-stabilizing stop valve (7), one end of which is connected to the outlet of the manual hydraulic pump (4) through a pipeline, and the other end of which is connected to the hydraulic locking interface (501) in the installation seat (5) of the instrument to be inspected through a pipeline.

4. The hydraulic automatic locking device for detecting a union type pressure transmitter according to claim 1, characterized in that: It also comprises a liquid return stop valve (8), wherein the liquid return stop valve (8) is connected to the return pressure pipeline of the manual hydraulic pump (4).

5. The hydraulic automatic locking device for detecting a union type pressure transmitter according to claim 1, characterized in that: A disc spring (511) is provided between the piston cylinder (506) and the detection base (503).

6. The hydraulic automatic locking device for detecting a union type pressure transmitter according to claim 1, characterized in that: An annular sealing ring (512) is arranged in the upper port of the second pressure channel in the piston seat (504).

7. A method for detecting hydraulic automatic locking by a union pressure transmitter, implemented by using the union pressure transmitter detecting hydraulic automatic locking device as claimed in any one of claims 1 to 6, characterized in that: The following steps are involved: S001: Place the pressure transmitter into the fixed flange and tighten the upper limit ring; S002: Open the pressure-stabilizing stop valve and close the liquid return stop valve; S003: Operate the manual hydraulic pump to pressurize the hydraulic locking interface, so that the mounting seat of the instrument under test is locked to the pressure transmitter under test, and then close the pressure stabilizing stop valve; S004: After the pressure transmitter is calibrated, first open the pressure relief valve to reduce the working pressure to zero, then open the pressure stabilizing stop valve, and then open the liquid return stop valve to make the pressure indication zero; S005: Open the limit ring and take out the limit ring and pressure transmitter.

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