Mounting and connecting tool for throttling orifice plate test

Abstract

The utility model relates to the technical field of throttling orifice plates, in particular to a mounting and connecting tool for a throttling orifice plate test. Comprising a pair of bent pipelines, an orifice plate clamping flange arranged at one end of each bent pipeline and used for clamping a throttling orifice plate, and a pipeline butt joint flange arranged at the other end of each bent pipeline and used for being in butt joint with a test pipeline on a flowmeter test bed. After the throttling orifice plate is clamped between the orifice plate clamping flanges of the pair of bent pipelines by the pair of bent pipelines, a U-shaped bent pipeline with a U-shaped bent part is integrally formed, and the U-shaped bent pipeline is connected in series in a test pipeline on the flow meter test bed through the pipeline butting flanges at the two ends of the U-shaped bent pipeline. According to the utility model, the test precision of the throttling orifice flowmeter is improved, and the test efficiency under the test condition of throttling orifices of multiple specifications is also improved at the same time.

Description

TECHNICAL FIELD

[0001] The utility model relates to throttle orifice plate technical field, specifically relates to a kind of installation connection tool for throttle orifice plate test. BACKGROUND

[0002] Throttle orifice plate flowmeter is a kind of widely used differential pressure flow measuring equipment, it is caused by installing a thin plate with specific opening (i.e. throttle orifice plate) in pipeline to cause local contraction of fluid flow, thereby generating pressure difference. The pressure difference is in certain relationship with the flow rate and flow of fluid, and the flow of fluid can be calculated by measuring the pressure difference.

[0003] After throttle orifice plate flowmeter is completed, it needs to be installed on flowmeter test bench to test performance (such as accuracy, range, etc.), to confirm whether it meets the specified performance requirements. However, the performance test method of existing throttle orifice plate flowmeter still has the following shortcomings:

[0004] First, in the experiment, throttle orifice plate is directly connected in the straight pipeline of test bench. This installation method may not completely meet the actual application occasion. For example, some throttle orifice plates need to be installed on curved pipeline, which may cause certain error between the performance of throttle orifice plate measured on the straight pipeline of flowmeter test bench and the performance of throttle orifice plate actually installed on curved pipeline.

[0005] Secondly, in order to achieve the best performance requirement of throttle orifice plate flowmeter, different throttle orifice sizes and arrangement structures of throttle orifice plate are usually designed and made to perform multiple tests during the development of throttle orifice plate. Therefore, different throttle orifice plates need to be repeatedly assembled and disassembled and replaced during the test, and the assembly and disassembly of throttle orifice plate is time-consuming, which greatly reduces the test efficiency of throttle orifice plate. UTILITY MODEL CONTENTS

[0006] In order to solve the above problems, the utility model provides an installation connection tool for throttle orifice plate test, which aims to improve the test accuracy of throttle orifice plate flowmeter and improve the test efficiency under the test condition of multiple specifications of throttle orifice plate. The specific technical scheme is as follows:

[0007] An installation connection tool for throttle orifice plate test includes a pair of curved pipelines, an orifice plate clamping flange arranged at one end of the curved pipeline for clamping throttle orifice plate, and a pipeline butt joint flange arranged at the other end of the curved pipeline for connecting with the test pipeline on the flowmeter test bench. After the pair of curved pipelines clamp the throttle orifice plate between the orifice plate clamping flanges of the pair of curved pipelines, a U-shaped curved pipeline with U-shaped curved part is formed, and the U-shaped curved pipeline is connected in the test pipeline on the flowmeter test bench through the pipeline butt joint flanges at both ends.

[0008] Preferably, the curved pipe is an S-shaped curved pipe formed by butting two 90-degree elbows.

[0009] In the utility model, the outer circle of the orifice plate clamping flange is larger than the outer circle of the throttling orifice plate, and a plurality of bolt holes are arranged on the orifice plate clamping flange at positions around the throttling orifice plate, and the orifice plate clamping flange realizes clamping of the throttling orifice plate through clamping bolts passing through the bolt holes on the orifice plate clamping flange.

[0010] Preferably, the number of the clamping bolts is four and they are arranged uniformly in the circumferential direction.

[0011] Preferably, the distance between the adjacent two clamping bolts is greater than the outer diameter of the throttling orifice plate, so that the throttling orifice plate can be replaced and tested quickly under different throttling orifice arrangements without disassembling the clamping bolts (the clamping bolts only need to be loosened but not removed).

[0012] As a further improvement of the utility model, the orifice plate clamping flange is a composite flange capable of realizing thickness contraction to facilitate assembly and disassembly of the throttling orifice plate, the composite flange comprises a reference flange, a rubber flange and a retreat flange which are connected in sequence by gluing, the reference flange is fixedly connected with one end of the curved pipe, the retreat flange is used for clamping the throttling orifice plate, and a tension screw is connected between the reference flange and the retreat flange for realizing approach of the retreat flange to the reference flange to leave a mounting gap for the throttling orifice plate.

[0013] Preferably, the number of the tension screws is four and they are arranged uniformly in the circumferential direction.

[0014] In the utility model, a gluing sealing gasket is arranged on one side of the retreat flange in contact with the throttling orifice plate and is fixed by gluing.

[0015] In order to prevent retreat of the retreat flange when clamping the throttling orifice plate, a retreat flange locking device is further arranged on the composite flange, the retreat flange locking device comprises a conical section outer circle which is arranged on a section of the tension screw close to the screw head and has a small outer diameter close to the screw head and a large outer diameter away from the screw head; and a locking screw is arranged on the reference flange and used for pressing the conical section outer circle of the tension screw.

[0016] By pressing the locking screw on the conical section outer circle of the tension screw, retreat of the tension screw can be prevented, and retreat of the retreat flange which cooperates with the tension screw is also prevented, thereby improving the reliability of the composite flange clamping the throttling orifice plate.

[0017] As a further improvement, the installation and connection tool for orifice plate test further comprises a positioning and dismounting device for center positioning and convenient dismounting during installation of the orifice plate, the positioning and dismounting device comprises a supporting plate fixedly arranged below the orifice plate, a servo electric push rod mounted on the supporting plate, and a V-shaped positioning piece arranged at the front end of the telescopic rod of the servo electric push rod, the V-shaped positioning piece is vertically arranged below the orifice plate and located between a pair of orifice plate clamping flanges.

[0018] Preferably, the thickness of the V-shaped positioning piece is less than the thickness of the orifice plate.

[0019] Preferably, the supporting plate is fixed between a pair of the curved pipes.

[0020] Preferably, the supporting plate is detachably fixed between a pair of the curved pipes by fastening bolts.

[0021] The above-mentioned retreat flange locking device and the positioning and dismounting device can be used jointly to facilitate installation, dismounting and replacement of the orifice plate.

[0022] (1) Preparation: adjust the height position of the V-shaped positioning piece by the servo electric push rod, so that the subsequent orifice plate is in contact with the V-shaped surface of the V-shaped positioning piece and is located in the coaxial position with the orifice plate clamping flange;

[0023] (2) Installation of the orifice plate: loosen the locking screw, then tighten the tensioning screw, so that the retreat flange approaches the reference flange under the action of the tensioning screw to overcome the elastic force of the rubber flange, thereby leaving an installation space for the orifice plate between a pair of retreat flanges (the distance between the rubber sealing gaskets on the pair of retreat flanges is greater than the thickness of the orifice plate); then insert the orifice plate from above between the rubber sealing gaskets on the pair of retreat flanges, and position the orifice plate on the V-shaped surface of the V-shaped positioning piece below, to realize automatic centering of the orifice plate and the orifice plate clamping flange; after positioning, loosen the tensioning screw in the reverse direction, so that the retreat flange resets under the action of the elastic restoring force of the rubber flange and abuts against the orifice plate, then tighten the locking screw to lock the tensioning screw (to prevent it from retreating), and then use the clamping bolt to clamp the orifice plate between the pair of orifice plate clamping flanges, thereby completing the installation of the orifice plate.

[0024] (3) Orifice plate installation, disassembly and replacement: loosen the locking screw, then tighten the tensioning screw, so that the retreat flange is close to the reference flange under the action of the tensioning screw, overcoming the elastic force of the rubber flange, thereby leaving the disassembly space of the orifice plate between the pair of retreat flanges (the distance between the glued sealing gaskets on the pair of retreat flanges is greater than the thickness of the orifice plate); then the extension rod of the servo electric push rod is raised upward, thereby driving the V-shaped positioning piece to move upward, thereby ejecting the orifice plate, realizing the disassembly of the orifice plate; the operator takes away the orifice plate, the extension rod of the servo electric push rod is reset, then the operator puts the new orifice plate with different orifice arrangement into the pair of orifice plate clamping flanges and positions it on the V-shaped surface of the lower V-shaped positioning piece, thereby realizing automatic centering and centering, after being in place, the tensioning screw is loosened in reverse rotation, so that the retreat flange is reset and pressed against the newly installed orifice plate under the action of the elastic restoring force of the rubber flange, then the locking screw is tightened to lock the tensioning screw (prevent it from retreating), and then the clamping bolt is used to clamp the newly installed orifice plate between the pair of orifice plate clamping flanges, thereby completing the replacement of the orifice plate.

[0025] The beneficial effects of the utility model are:

[0026] Firstly, the installation and connection tool for orifice plate test can meet the test requirements of orifice plate actually used on the curved pipeline by connecting the orifice plate together with the curved pipeline in the straight pipeline of the flowmeter test bench, which is more consistent with the actual application occasion, so that the calibration error of the orifice plate flowmeter can be reduced and the test precision of the orifice plate flowmeter can be improved.

[0027] Secondly, the installation and connection tool for orifice plate test can realize the retreat of the flange clamping surface by adopting the specially designed composite flange structure, so as to leave the installation space of the orifice plate, greatly facilitating the installation of the orifice plate and improving the test efficiency of the orifice plate.

[0028] Thirdly, the installation and connection tool for orifice plate test is provided with the positioning and dismounting device, the orifice plate can realize automatic centering by the V-shaped positioning piece thereon and can be automatically ejected when dismounting is needed, so that the test efficiency under the test condition of multiple specifications of orifice plates is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a schematic view of the installation and connection tool for orifice plate test of the utility model;

[0030] Figure 2 is Figure 1 a partial enlarged view of

[0031] Figure 3is a partial left cross-sectional view of 1.

[0032] In the figure: 1, curved pipe, 2, orifice plate, 3, orifice plate clamping flange (composite flange), 4, test pipe, 5, pipe butt flange, 6, U-shaped curved pipe, 7, 90-degree elbow, 8, clamping bolt, 9, reference flange, 10, rubber flange, 11, retreat flange, 12, tensioning screw, 13, rubber joint sealing gasket, 14, outer circle of conical section, 15, locking screw, 16, positioning and dismounting device, 17, support plate, 18, servo electric push rod, 19, V-shaped positioning piece. DETAILED DESCRIPTION

[0033] The specific embodiments of the utility model will be further described below in combination with the drawings and examples. The following examples are only used to more clearly illustrate the technical scheme of the utility model, and cannot be used to limit the protection scope of the utility model.

[0034] As Figures 1 to 3 shown is an embodiment of the utility model for the installation and connection tooling of orifice plate test, including a pair of curved pipes 1, the orifice plate clamping flange 3 for clamping the orifice plate 2 is arranged at one end of the curved pipe 1, the pipe butt flange 5 for being opposite to the test pipe 4 on the flowmeter test bench is arranged at the other end of the curved pipe 1;After the pair of curved pipes 1 clamps the orifice plate 2 between the orifice plate clamping flange 3 of the pair of curved pipes 1, the whole forms a U-shaped curved pipe 6 with U-shaped curved part, and the U-shaped curved pipe 6 is connected in series in the test pipe 4 on the flowmeter test bench through the pipe butt flange 5 at both ends.

[0035] Preferably, the curved pipe 1 is S-shaped curved pipe formed by the butt joint of two 90-degree elbows 7.

[0036] In the embodiment, the outer circle of the orifice plate clamping flange 3 is greater than the outer circle of the orifice plate 2, and a plurality of bolt holes are arranged on the orifice plate clamping flange 3 at the position of the periphery of the orifice plate 2, and the orifice plate clamping flange 3 realizes the clamping of the orifice plate 2 by the clamping bolt 8 passing through the bolt hole of the orifice plate clamping flange 3.

[0037] Preferably, the number of the clamping bolt 8 is four and is uniformly arranged along the circumference.

[0038] Preferably, the distance between the adjacent two clamping bolts 8 is greater than the outer circle diameter of the orifice plate 2, so as to facilitate the rapid replacement and test of the orifice plate 2 under different orifice arrangements without dismounting the clamping bolt 8 (the clamping bolt 8 only needs to be loosened without being removed).

[0039] As a further improvement of the embodiment, the orifice plate clamping flange 3 is a composite flange capable of thickness contraction to facilitate the mounting and dismounting of the orifice plate 2. The composite flange comprises a reference flange 9, a rubber flange 10 and a retreat flange 11 connected in sequence by gluing. The reference flange 9 is fixedly connected to one end of the curved pipeline 1. The retreat flange 11 is used to clamp the orifice plate 2. A tension screw 12 is connected between the reference flange 9 and the retreat flange 11 to realize the retreat flange 11 approaching the reference flange 9 to give a mounting gap for the orifice plate 2.

[0040] Preferably, the number of the tension screws 12 is four and they are arranged uniformly in the circumferential direction.

[0041] In the embodiment, a gluing sealing gasket 13 is arranged on the retreat flange 11 in contact with the orifice plate 2 by gluing.

[0042] In order to prevent the retreat of the retreat flange 11 when clamping the orifice plate 2, a retreat flange locking device is further arranged on the composite flange. The retreat flange locking device comprises a conical section outer circle 14 arranged on the tension screw 12 near the screw head, which has a small outer diameter near the screw head and a large outer diameter away from the screw head. A locking screw 15 is arranged on the reference flange 9 to press the conical section outer circle 14 of the tension screw 12.

[0043] By pressing the locking screw 15 on the conical section outer circle 14 of the tension screw 12, the retreat of the tension screw 12 can be prevented, which is equivalent to preventing the retreat of the retreat flange 11 threaded with the tension screw 12. Therefore, the reliability of the composite flange clamping the orifice plate 2 can be improved.

[0044] As a further improvement, a mounting and connecting tool for orifice plate test of the embodiment further comprises a positioning and dismounting device 16 for center positioning and facilitating dismounting when mounting the orifice plate 2. The positioning and dismounting device 16 comprises a support plate 17 fixedly arranged below the orifice plate 2, a servo electric push rod 18 mounted on the support plate 17, and a V-shaped positioning piece 19 arranged at the front end of the telescopic rod of the servo electric push rod 18. The V-shaped positioning piece 19 is vertically arranged below the orifice plate 2 and between a pair of the orifice plate clamping flanges 3.

[0045] Preferably, the thickness of the V-shaped positioning piece 19 is less than the thickness of the orifice plate 2.

[0046] Preferably, the support plate 17 is fixed between a pair of the curved pipelines 1.

[0047] Preferably, the support plate 17 is detachably fixed between the pair of curved pipes 1 by fastening bolts.

[0048] The retreat flange locking device and the positioning and dismounting device can be used jointly to facilitate the installation, dismounting and replacement of the orifice plate. The specific use method is as follows:

[0049] (1) Preparation: the height position of the V-shaped positioning piece 19 is adjusted by the servo electric push rod 18, so that the subsequent orifice plate 2 is in contact with the V-shaped surface of the V-shaped positioning piece 19 and is just located in the coaxial position with the orifice plate clamping flange 3;

[0050] (2) Installation of the orifice plate: loosen the locking screw 15, then tighten the tension screw 12, so that the retreat flange 11 approaches the reference flange 9 under the action of the tension screw 12 and overcomes the elastic force of the rubber flange 10, thereby leaving a mounting space for the orifice plate 2 between the pair of retreat flanges 11 (the distance between the rubber sealing gaskets 13 on the pair of retreat flanges 11 is greater than the thickness of the orifice plate 2); then the orifice plate 2 is inserted between the rubber sealing gaskets 13 on the pair of retreat flanges 11 from above, and the orifice plate 2 is positioned on the V-shaped surface of the V-shaped positioning piece 19 below, so as to realize the automatic centering of the orifice plate 2 and the orifice plate clamping flange 3; after positioning, the tension screw 12 is loosened in the reverse direction, so that the retreat flange 11 is reset under the action of the elastic restoring force of the rubber flange 10 and abuts against the orifice plate 2, then the locking screw 15 is tightened to lock the tension screw 12 (to prevent it from retreating), and then the orifice plate 2 is clamped between the pair of orifice plate clamping flanges 3 by using the clamping bolts 8, thereby completing the installation of the orifice plate 2;

[0051] (3) orifice plate installation, disassembly and replacement: loosen the locking screw 15, then tighten the tension screw 12, so that the retreat flange 11 is close to the reference flange 9 under the action of the tension screw 12, overcoming the elastic force of the rubber flange 10, thereby leaving a disassembly space of the orifice plate 2 between the pair of retreat flanges (the distance between the glued sealing gasket 13 on the pair of retreat flanges 11 is greater than the thickness of the orifice plate 2); then the extension rod of the servo electric push rod 18 is raised upward, thereby driving the V-shaped positioning piece 19 to move upward, thereby ejecting the orifice plate 2, realizing the disassembly of the orifice plate 2; the operator takes away the orifice plate 2, the extension rod of the servo electric push rod 18 is retracted and reset, then the operator puts the new orifice plate 2 with different orifice arrangement into the pair of orifice plate clamping flanges 3 and positions it on the V-shaped surface of the lower V-shaped positioning piece 19, thereby realizing automatic centering and centering, after being in place, the tension screw 12 is loosened in the reverse direction, so that the retreat flange 11 is reset and pressed against the newly installed orifice plate 2 under the action of the elastic restoring force of the rubber flange 10, then the locking screw 15 is tightened to lock the tension screw 12 (to prevent it from retracting), then the clamping bolt 8 is used to clamp the newly installed orifice plate 2 between the pair of orifice plate clamping flanges 3, thereby completing the replacement of the orifice plate 2.

[0052] The above only describes preferred embodiments of the present application, and it should be noted that for ordinary skilled persons in the technical field, without departing from the technical principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered within the protection scope of the present application.

Claims

1. An installation connecting tool for orifice plate testing, characterized in that, It includes a pair of curved pipes, an orifice plate clamping flange disposed at one end of the curved pipes for clamping the orifice plate, and a pipe docking flange disposed at the other end of the curved pipes for connecting with the test pipe on the flowmeter test bench; after the pair of curved pipes clamp the orifice plate clamping flanges between the pair of curved pipes, they form a U-shaped curved pipe with a U-shaped bend, and the U-shaped curved pipe is connected in series with the test pipe on the flowmeter test bench through the pipe docking flanges at both ends.

2. The mounting connection tool for orifice plate test according to claim 1, characterized in that, The curved pipe is an S-shaped curved pipe formed by the connection of two 90-degree bends.

3. The mounting connection tool for orifice plate test according to claim 1, characterized in that, The outer circle of the orifice plate clamping flange is larger than the outer circle of the throttling orifice plate, and a number of bolt holes are provided on the orifice plate clamping flange at a position on the periphery of the throttling orifice plate. The orifice plate clamping flange clamps the throttling orifice plate by clamping bolts passing through the bolt holes on the orifice plate clamping flange.

4. The mounting connection tool for orifice plate test according to claim 1, characterized in that, The orifice plate clamping flange is a composite flange that can achieve thickness shrinkage to facilitate the installation and removal of the orifice plate. The composite flange includes a base flange, a rubber flange, and a relief flange that are sequentially stacked and connected by adhesive bonding. The base flange is fixedly connected to one end of the curved pipe. The relief flange is used to clamp the orifice plate. A tensioning screw is connected between the base flange and the relief flange to move the relief flange toward the base flange to make room for the installation gap of the orifice plate.

5. The mounting connection tool for orifice plate test according to claim 4, characterized in that, An adhesive sealing gasket, which is fixed by adhesive bonding, is provided on the side of the relief flange that contacts the orifice plate.

6. The mounting connection tool for orifice plate test according to claim 4, characterized in that, The composite flange is also provided with a relief flange locking device, which includes setting a section of the outer circle on the tensioning screw near the screw head as a conical section with a smaller outer diameter near the screw head and a larger outer diameter away from the screw head; and a locking screw is provided on the reference flange for tightening the conical section of the outer circle on the tensioning screw.

7. The mounting connection tool for orifice plate test according to claim 1, characterized in that, The device also includes a positioning and disassembly device for centering and facilitating disassembly of the orifice plate during installation. The positioning and disassembly device includes a support plate fixedly disposed below the orifice plate, a servo electric push rod mounted on the support plate, and a V-shaped positioning piece disposed at the front end of the telescopic rod of the servo electric push rod. The V-shaped positioning piece is vertically disposed directly below the orifice plate and located between a pair of orifice plate clamping flanges.

8. The mounting connection tool for orifice plate test according to claim 7, characterized in that, The thickness of the V-shaped positioning plate is less than the thickness of the throttling orifice plate.

9. The mounting connection tool for orifice plate test according to claim 7, characterized in that, The support plate is fixed between the pair of curved pipes.

10. The mounting connection tool for orifice plate test according to claim 7, characterized in that, The support plate is detachably fixed between the pair of curved pipes by fastening bolts.

Images