Detachable pipeline strain double-channel measuring device

Abstract

The utility model discloses a detachable pipeline strain double-channel measuring device, which comprises a fixing clamp, a measuring device, a measuring device and a measuring device, wherein the fixing clamp is of an arc-shaped sheet-shaped structure; the test fixture is provided with a cambered surface matched with the outer wall surface of the pipe fitting to be tested, the test fixture is connected with the end part of the fixed fixture and matched with the end part of the fixed fixture to form two groups of hoop structures, and the outer wall surface of the test fixture is provided with a plurality of hole seats; the testing beam is located between the two sets of hoop structures, the two ends of the testing beam are fixedly connected with the hole seats at the corresponding ends respectively, the middle of the testing beam is fixedly connected with a strain gauge, the strain gauge is used for being in electric signal connection with external data analysis equipment, and a gap is formed between the testing beam and the outer wall face of the to-be-tested pipe fitting; the strain gauge is simple in structure, the strain gauge does not need to be pasted on the pipe fitting to be tested, disassembly and assembly are convenient, and testing efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to pipeline detection technical field, concretely relates to a detachable pipeline strain double channel measuring device. BACKGROUND

[0002] The hydraulic system has a very key role to the safe normal operation of equipment and the guarantee of design performance, especially in large equipment maintenance work, the cause of most hydraulic pipeline failure is abnormal vibration, so the vibration stress monitoring and analysis of power hydraulic and other pipelines are particularly important for avoiding catastrophic accidents caused by structural failure, reducing maintenance cost and prolonging service life. In order to measure the stress and strain of the pipeline, the most widely selected method is strain measurement.

[0003] In large equipment maintenance, there are many hydraulic pipelines, which are widely distributed and complex in structure. The traditional wired strain test system needs to paste strain gauges at each measuring point, and then connect the wires with the acquisition equipment after solidification. Once the pasting is not firm or there is damage, the process needs to be operated again. Under the measurement workload of hundreds of measuring points, the whole operation is low in work efficiency, high in labor intensity and time-consuming. In addition, due to the large number of measuring points, the connection lines between the strain gauges and the acquisition equipment are also numerous. In addition to the high construction cost, the current complex software and hardware support has high power consumption. Once there is a problem with individual wiring or sensor, it is difficult to troubleshoot.

[0004] Therefore, how to provide a detachable pipeline strain double channel measuring device which is convenient and efficient is a problem to be solved by those skilled in the art. UTILITY MODEL CONTENTS

[0005] Therefore, the utility model provides a detachable pipeline strain double channel measuring device, which can realize convenient operation of pipeline strain measurement, does not need to paste strain gauges directly on the measured pipe, and can be quickly disassembled, reused and improve detection efficiency.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme: a detachable pipeline strain double channel measuring device, which comprises:

[0007] The fixing clamp is an arc-shaped sheet structure.

[0008] The test clamp is provided with an arc surface matched with the outer wall surface of the measured pipe, and the test clamp is connected with the end of the fixing clamp and matched to form a hoop structure, the hoop structure has two groups, and the outer wall surface of the test clamp is provided with a plurality of hole seats.

[0009] The test beam is located between two groups of hoop structures, and the two ends of the test beam are fixedly connected with the hole seats of the corresponding ends respectively, the middle part of the test beam is fixedly connected with a strain gauge, the strain gauge is used for electrical signal connection with an external data analysis device, and the test beam has a gap with the outer wall surface of the pipe to be tested.

[0010] The utility model discloses the beneficial effects are: test fixture and fixed clamp constitute the hoop structure, and two hoop structures cooperate and clamp test beam, when testing, the stress is transferred through test fixture, and the stress strain condition of the part to be measured of cylindrical component is indirectly measured, and the strain condition of the pipe to be tested is collected by strain gauge through test fixture and test beam, and is analyzed out through external analysis equipment, and the detection is efficient, compared with that strain gauge is directly fixed in the part to be measured in traditional strain measurement, a large amount of time is spent in pasting and fixing and subsequent dismounting, the utility model discloses convenient installation, can be quickly dismounted, and need not pretreatment and other operations to the component to be measured, not only protect strain gauge, but also save corresponding cost, need not paste multiple strain gauges on the pipe to be tested, and the detection is efficient.

[0011] Preferably, one end of the fixed clamp is pivotally connected with one end of the test fixture, the fixed clamp and the test fixture are connected together on the outer circumferential side of the pipe to be tested, and the other end of the fixed clamp is fixedly connected with the other end of the test fixture through a fastener.

[0012] The technical effects generated thereby are that the fixed clamp provides a support base, the fixed clamp and the test fixture are connected together in a clamping manner, are convenient to dismount, have high reusability, and only need to dismount and mount the fastener.

[0013] Preferably, the hole seat on the test fixture is a rectangular hole seat, a rectangular jack for inserting the test beam is arranged on the hole seat, there are two groups of hole seats on the test fixture, and the rectangular jacks on the two groups of hole seats are arranged vertically, the two rectangular jacks form two test channels and cooperate with the test beam and the strain gauge to test the strain of the pipe to be tested in two mutually perpendicular directions, and the axial direction of the rectangular jack is parallel to the axial direction of the pipe to be tested.

[0014] The technical effects generated thereby are that the rectangular jacks on the hole seats provide a fixed mounting base for the test beam, two test channels are matched with two test beams, data measurement errors can be reduced, and the accuracy of test results can be improved.

[0015] Preferably, a fastening hole penetrating through the rectangular jack is arranged on the hole seat, and a fastening nail for fixing the test beam is connected in the fastening hole.

[0016] The technical effects generated thereby are that the fastening hole is used for connecting the fastening nail, and the test beam is fixed with the corresponding hole seat through the fastening nail.

[0017] Preferably, the fastener is a high-strength bolt, a self-tapping screw or a buckle.

[0018] The resulting technical effect is that the fasteners have various structural forms and can be reasonably selected according to specific usage conditions.

[0019] Preferably, an axial hole is provided on one end edge of the test fixture, and a fixing hole is provided on the other end edge of the test fixture. The axial direction of the fixing hole is perpendicular to the axial direction of the axial hole. A connecting shaft for hingedly connecting one end of the fixing fixture is connected in the axial hole, and a fastener for fixing the other end of the fixing fixture is provided in the fixing hole.

[0020] The resulting technical effect is that the opening and closing directions of the test fixture and the fixing fixture correspond to the radial direction of the pipe to be tested, which facilitates assembly and disassembly.

[0021] Preferably, the test beam is made of metal elastic material.

[0022] The resulting technical effect is that metal elastic parts can better transmit strain. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Fig. 1 This is the overall structure diagram of a detachable dual-channel pipe strain measurement device of the utility model;

[0024] Fig. 2 This is a structural diagram of a test fixture for a detachable dual-channel pipe strain measurement device of the utility model;

[0025] Fig. 3 This is a structural diagram of a fixing fixture of a detachable dual-channel pipe strain measuring device of the utility model;

[0026] Fig. 4 This is a schematic diagram of the installation of a test beam and strain gauge of a detachable dual-channel pipeline strain measurement device of the utility model;

[0027] Fig. 5 This is a test application diagram of a detachable dual-channel pipeline strain measurement device of the utility model.

[0028] 1 Fixing fixture, 2 Test fixture, 3 Hole seat, 4 Rectangular socket, 5 Test beam, 6 Strain gauge, 7 Fastener, 8 Fastening nail. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Referring to the drawings of the utility model Figs. 1 to 5 , according to the utility model embodiment a detachable pipe strain double-channel measuring device, it includes:

[0031] Fixed clamp 1, fixed clamp 1 is arc sheet structure, it is convenient to cooperate with the clamping of the pipe to be measured,

[0032] Test clamp 2, test clamp 2 is equipped with the arc surface of the cooperation outer wall surface of pipe to be measured 9, to better the transmission pipe to be measured strain, test clamp 2 and the end of fixed clamp 1 are connected and cooperate to form the hoop structure, the hoop structure has two groups, and the outer wall surface of test clamp 2 is equipped with two hole seats 3;

[0033] Test beam 5, test beam 5 is located between two hoop structures, and the both ends of test beam 5 are fixedly connected with the hole seat 3 of corresponding end respectively, and the middle part of test beam 5 is fixedly connected with strain gauge 6, in actual use process, according to the measurement requirement, corresponding strain gauge 6 is selected, and it is solidified on test beam 5;Strain gauge 6 can be solidified by conventional strain gauge solidification procedure and be operated by pressurization, solidification, stabilization and sealing protection, after strain gauge 6 is installed at the center position of test beam 5 according to the above procedure, strain gauge 6 is fixed at the center position of test beam 5, the influence of structure on strain gauge 6 measurement is reduced, stress-strain transmission model is more accurate, strain gauge 6 is used for electrical signal connection with external data analysis equipment, and test beam 5 and the outer wall surface of pipe to be measured have a gap, and strain is not measured by the direct contact of test beam and pipe to be measured.

[0034] The distance between test clamp 2 arc surface and test beam 5 is 0.5mm~2.5mm, and the distance is too large to affect strain transmission ratio, and the distance is too small, and test beam 5 will contact the measurement area, causing unnecessary error.

[0035] In some other embodiments, one end of fixed clamp 1 is pivotally connected with one end of test clamp 2, fixed clamp 1 and test clamp 2 are connected in the outer circumferential side of pipe to be measured 9, and the other end of fixed clamp 1 is fixedly connected with the other end of test clamp 2 through fastener 7. The structural form of fastener 7 is not limited to high-strength bolt, self-tapping, buckle and the like.

[0036] In some other specific embodiments, the hole seat 3 on test clamp 2 is rectangular hole seat, and the rectangular jack 4 for inserting test beam is arranged on the hole seat 3, the hole seat on test clamp 2 has two groups, and the rectangular jacks 4 on the two groups of hole seats are vertically arranged, two rectangular jacks form two test channels and cooperate with test beam and strain gauge to test the strain of pipe to be measured in two mutually perpendicular directions, and the axial direction of rectangular jack 4 is parallel to the axial direction of pipe to be measured 9.

[0037] In some other embodiments, the hole seat 3 is provided with a fastening hole penetrating through the rectangular insertion hole, and a fastening pin 8 for fixing the test beam is connected in the fastening hole.

[0038] Specifically, one side edge of the test clamp 2 is provided with an axle hole 21, and the other end edge of the test clamp 2 is provided with a fixing hole, the axial direction of which is perpendicular to the axial direction of the axle hole 21, the axle hole 21 is connected with a connecting axle 10 for hingedly fixing one end of the clamp, and the fixing hole is provided with a fastener for fixing the other end of the clamp 1.

[0039] The test clamp 2 and the fixing clamp 1 are both formed of 1Cr18Ni10Ti alloy material.

[0040] The test beam 5 is a metal elastic material piece, which vibrates with the same frequency as the pipe to be tested, and is easy to transmit stress, and specifically can be a 304 stainless steel piece. The thickness of the test beam 5 is 0.1mm-0.5mm, and the length is 20mm-50mm, so as to ensure that the installation of the test beam 5 will not affect the vibration mode and modal of the pipe to be tested, and improve the strain transmission ratio.

[0041] When the pipe to be tested is detected, the fixing clamp, the test clamp, the test beam and the strain gauge are assembled according to the installation requirements. After the installation is completed, the strain gauge 6 is connected with the external circuit module through the wire, the resistance change of the strain gauge 6 is converted into voltage change, and after being amplified by the amplification circuit, the analog signal is converted into digital signal. After the terminal processes the data such as noise reduction and analysis, the strain value of the test beam 5 can be obtained, a mathematical calculation model is established according to the strain mapping relationship between the test beam 5 and the tested part after calibration, and finally the real strain value of the corresponding test pipe is calculated according to the model.

[0042] For the device and the use method disclosed in the embodiments, since they correspond to the method disclosed in the embodiments, the description is relatively simple, and the related parts can be referred to the method part.

[0043] The above description of the disclosed embodiments enables a person skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A detachable dual-channel pipe strain measurement device, characterized in that: include: A fixing fixture (1), wherein the fixing fixture (1) is an arc-shaped sheet structure; A test fixture (2), wherein the test fixture (2) is provided with an arc surface that matches the outer wall surface of the pipe to be tested (9), the test fixture (2) is connected to the end of the fixing fixture (1) and cooperates to form a clamp structure, the clamp structure has two groups, and a plurality of hole seats (3) are provided on the outer wall surface of the test fixture (2); A test beam (5) is provided, wherein the test beam (5) is located between the two sets of hoop structures and both ends of the test beam (5) are respectively fixedly connected to the hole seats (3) at the corresponding ends; a strain gauge (6) is fixedly connected to the middle portion of the test beam (5); the strain gauge (6) is used for connecting an electrical signal to an external data analysis device; and a gap is provided between the test beam (5) and the outer wall surface of the pipe to be tested.

2. The detachable dual-channel pipe strain measurement device according to claim 1, characterized in that: One end of the fixing fixture (1) is pivotally connected to one end of the test fixture (2); the fixing fixture (1) and the test fixture (2) are connected together on the outer peripheral side of the pipe to be tested (9); and the other end of the fixing fixture (1) and the other end of the test fixture (2) are fixedly connected via a fastener (7).

3. The detachable dual-channel pipe strain measurement device according to claim 2, characterized in that: The hole seat (3) on the test fixture (2) is a rectangular hole seat, and a rectangular jack (4) for plugging in a test beam is provided on the hole seat (3). The test fixture (2) has two groups of hole seats, and the rectangular jacks (4) on the two groups of hole seats are arranged vertically. The two rectangular jacks form two test channels and cooperate with the test beam and the strain gauge to test the strain of the pipe to be tested in two mutually perpendicular directions. The axial direction of the rectangular jack (4) is parallel to the axial direction of the pipe to be tested (9).

4. The detachable dual-channel pipe strain measurement device according to claim 3, characterized in that: The hole seat (3) is provided with a fastening hole that passes through the rectangular insertion hole, and a fastening nail (8) for fixing the test beam is connected in the fastening hole.

5. The detachable dual-channel pipe strain measurement device according to claim 4, characterized in that: The fasteners (7) are high-strength bolts, self-tapping threads, and snap fasteners.

6. The detachable dual-channel pipe strain measurement device according to claim 2, characterized in that: An axial hole (21) is provided on one end edge of the test fixture (2), and a fixing hole is provided on the other end edge of the test fixture (2). The axial direction of the fixing hole is perpendicular to the axial direction of the axial hole (21). A connecting shaft (10) for hingedly connecting one end of the fixing fixture is connected in the axial hole (21), and a fastener for fixing the other end of the fixing fixture (1) is provided in the fixing hole.

7. The detachable dual-channel pipe strain measurement device according to claim 1, characterized in that: The test beam (5) is made of metal elastic material.

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