An offshore test platform for oil liquid mass flow meters

Abstract

The utility model relates to mass flowmeter test technical field, concretely is an offshore test platform for oil liquid mass flowmeter, including real ship clamping plate, the high accuracy oil liquid mass flowmeter is connected with through the bolt fastening of real ship clamping plate top, the high accuracy oil liquid mass flowmeter right -hand member is equipped with the connecting disc, the connecting disc inside is equipped with a plurality of adaptation groove, the connecting disc right -hand member is equipped with the oil liquid mass flowmeter of measuring, the oil liquid mass flowmeter of measuring is equipped with a group of stabilizing block in two ends, every stabilizing block inboard is equipped with the moving block, every moving block top is equipped with the clamping frame, every clamping frame one end is fixed with the front -and -back moving plate, every front -and -back moving plate is equipped with the clamping ring in one end close to the oil liquid mass flowmeter of measuring, the utility model discloses the measurement data of high accuracy oil liquid mass flowmeter is standard value to the convenience test oil liquid mass flowmeter of measuring to the guarantee oil liquid mass flowmeter of measuring test precision.

Description

Technical Field

[0001] This utility model belongs to the field of mass flow meter testing technology, specifically a marine test platform for an oil mass flow meter. Background Technology

[0002] With the rapid development of marine engineering technologies such as intelligent green ships and offshore oil and gas development, oil mass flow meters, as core metering equipment, are widely used in scenarios such as ship fuel consumption accounting, offshore platform oil transfer metering, and oil and gas trade handover. Their measurement accuracy and reliability directly affect the optimization of ship power efficiency, control of operating costs, and fairness of trade. Therefore, it is usually necessary to test the accuracy of oil mass flow meters of the same model before use.

[0003] However, most existing testing methods involve building a laboratory and simulating the required environment within the laboratory to conduct the test. This testing method has low accuracy, and the existing testing equipment is directly fixed to the oil pipeline during use, resulting in poor stability. To address these issues, this invention designs an offshore testing platform for an oil mass flow meter. Utility Model Content

[0004] In view of the above situation and to overcome the defects of the prior art, this utility model provides a marine test platform for an oil mass flow meter, which effectively solves the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a marine test platform for an oil mass flow meter, comprising a shipboard clamping plate, wherein a high-precision oil mass flow meter is bolted to the top of the shipboard clamping plate, a connecting plate is provided at the right end of the high-precision oil mass flow meter, the connecting plate has several adapter grooves inside, a sealing gasket is tightly fitted to the right end of the connecting plate, a connecting flange is tightly fitted to the right end of the sealing gasket, the oil mass flow meter to be tested is fixed to the right end of the connecting flange, a set of stabilizing blocks are provided at both the front and rear ends of the oil mass flow meter to be tested, each stabilizing block has a left and right moving screw inside, each left and right moving screw has a moving block inside, each moving block has a clamping frame at the top, a front and rear moving plate is fixed at one end of each clamping frame, each front and rear moving plate has a front and rear moving screw inside, and a clamping ring is provided at the end of each front and rear moving screw near the oil mass flow meter to be tested.

[0006] Preferably, a controller is fixed to the top of the solid ship clamping plate, an inlet pipe is fixed to the left end of the high-precision oil mass flow meter via a flange, a connecting pipe is fixed to the right end of the high-precision oil mass flow meter via a flange, the connecting pipe is fixedly connected to the connecting plate, an outlet pipe is fixed to the right end of the oil mass flow meter to be tested via a flange, an adapter block is slidably connected inside each adapter groove, a sealing screw is fixed to the right end of each adapter block, and each sealing screw is fastened to the connecting plate and the connecting flange by a nut.

[0007] Preferably, each of the stabilizing blocks has a stabilizing pad fixed to its bottom, each of the stabilizing blocks is fastened to the solid ship clamp plate by bolts, each group of stabilizing blocks is fixedly connected by a bottom stabilizing rod, each of the left and right moving screws has a bottom handle fixed to its outer end, each of the left and right moving screws is engaged with the internal thread of one of the stabilizing blocks, each of the left and right moving screws has a bottom bearing fixed to its inner side, the inner side of the outer ring of each bottom bearing is fixedly connected to the moving block, and each moving block is slidably connected to the bottom stabilizing rod inside it.

[0008] Preferably, each of the movable blocks has a vibration damping pad fixed at its bottom, a movable block bearing fixed at its top, a vertical moving screw fixed to the inner ring of each movable block bearing, a vertical moving handle fixed to the top of each vertical moving screw, a plurality of vertical moving positioning rods fixed to the top of each movable block, and a baffle fixed to the top of each group of vertical moving positioning rods.

[0009] Preferably, each of the vertical moving screws is threadedly connected to the internal thread of its external clamping frame, each of the clamping frames is slidably connected to the vertical moving positioning rod at one end of its frame, each of the front and rear moving screws is externally fixed with a front and rear moving handle, each of the front and rear moving screws is threadedly connected to the internal thread of its external front and rear moving plate, each of the front and rear moving screws is internally fixed with a front and rear moving bearing, the outer ring of the inner side of each front and rear moving bearing is fixedly connected to the clamping ring, each clamping ring is topped with a top vibration damping pad, and each clamping ring is externally fixed with a front and rear moving positioning rod, each of the front and rear moving positioning rods being slidably connected to the front and rear moving plate at one end of its frame.

[0010] Compared with the prior art, the beneficial effects of this utility model are: This invention uses high-precision oil mass flow meter measurements as standard values ​​to facilitate testing of the oil mass flow meter under test, thus ensuring the testing accuracy of the oil mass flow meter. The cooperation of the left and right moving screws, the moving block bearings, and the front and rear moving screws allows the moving block, clamping frame, and clamping ring to move, thereby ensuring that several top vibration damping pads are in close contact with the oil mass flow meter under test, thus ensuring the stability of the oil mass flow meter under test and reducing vibration. At the same time, the entire platform can be adapted to oil mass flow meters of different sizes and shapes, thereby improving the application range of the entire platform.

[0011] This invention uses a connecting plate to position the connecting flange, thereby ensuring the stability of the mass flow meter of the oil under test and thus guaranteeing the test results. The adapter groove allows the adapter block to move, thereby changing the position of the sealing screw and adapting to connecting flanges of different sizes, thus further improving the application range of the entire platform. At the same time, the sealing gasket ensures the sealing performance of the connecting plate and the connecting flange, thereby guaranteeing the test accuracy.

[0012] This utility model uses a clamping frame to position the front and rear moving plates, and a top vibration damping pad to ensure the stability of the oil mass flow meter under test, while also reducing vibration of the oil mass flow meter, thereby improving the service life of the entire platform and ensuring test accuracy. At the same time, the stabilizing pad and vibration damping pad can reduce the vibration of the moving block, thereby ensuring the stability of the moving block, thus ensuring the stability of the entire platform, and thus ensuring the stability of the oil mass flow meter under test. Attached Figure Description

[0013] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0014] In the attached diagram: Figure 1 This is a schematic diagram of the overall design of this utility model; Figure 2 This is a top view of the entire utility model; Figure 3 This is a schematic diagram of the right end of the entire utility model; Figure 4 This is a schematic diagram of the lower end of the clamping frame of this utility model; Figure 5 This is a schematic diagram of the rear end of the high-precision oil mass flow meter of this utility model; Figure 6 This is a schematic diagram of the top of the clamping frame of this utility model; Figure 7 This is a schematic diagram of the clamping ring of this utility model; Figure 8 This is a schematic diagram of the right end of the connecting plate of this utility model; Figure 9 This is a schematic diagram of the internal structure of the adapter slot of this utility model; Figure 10 This is a cross-sectional view of the connecting disc of this utility model.

[0015] In the diagram: 1-Solid ship clamping plate; 2-High-precision oil mass flow meter; 3-Connecting plate; 4-Oil mass flow meter to be measured; 5-Stabilizing block; 6-Moving block; 7-Clamping frame; 101-Controller; 201-Connecting pipe; 202-Inlet pipe; 301-Adapter groove; 302-Sealing gasket; 303-Adapter block; 304-Sealing screw; 401-Outlet pipe; 402-Connecting flange; 501-Stabilizing gasket; 502-Left and right moving screw; 503- Bottom handle; 504-Bottom stabilizer bar; 505-Bottom bearing; 601-Vibration damping pad; 602-Baffle; 603-Moving block bearing; 604-Vertical moving screw; 605-Vertical moving handle; 606-Vertical moving positioning rod; 701-Front and rear moving screw; 702-Front and rear moving handle; 703-Front and rear moving plate; 704-Front and rear moving positioning rod; 705-Clamping ring; 706-Top vibration damping pad; 707-Front and rear moving bearing. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0017] Example 1, by Figures 1-2 , Figures 4-5 , Figure 8The present invention includes a ship-mounted clamp plate 1, which supports the entire platform. A high-precision oil mass flow meter 2 is bolted to the top of the clamp plate 1. The high-precision oil mass flow meter 2 is a calibrated oil mass flow meter with high accuracy. The measurement data of the high-precision oil mass flow meter 2 is a standard value, which facilitates the testing of the oil mass flow meter 4 under test, thereby ensuring the testing accuracy of the oil mass flow meter 4 under test. A connecting plate 3 is provided on the right end of the high-precision oil mass flow meter 2. The connecting plate 3 is made of alloy material and is used to position the connecting flange. 402, thereby ensuring the stability of the oil mass flow meter 4 to be tested, thus ensuring the test effect. The connecting plate 3 has several adapter grooves 301 inside, which are used to position the adapter block 303. A sealing gasket 302 is tightly attached to the right end of the connecting plate 3. The sealing gasket 302 is made of rubber material. The sealing gasket 302 can ensure the sealing performance between the connecting plate 3 and the connecting flange 402. The right end of the sealing gasket 302 is tightly attached to the connecting flange 402. The connecting flange 402 is used to position the oil mass flow meter 4 to be tested. The oil mass flow meter 4 to be tested is fixed to the right end of the connecting flange 402. The flow meter 4 is the flow meter to be tested. A set of stabilizing blocks 5 are provided at both ends of the flow meter 4. The stabilizing blocks 5 are made of alloy material and are used to position the moving block 6. Each stabilizing block 5 has a left-right moving screw 502 inside. The left-right moving screw 502 can drive the moving block 6 to move by rotation. A moving block 6 is provided inside each left-right moving screw 502. The moving block 6 is made of alloy material and is used to support the vertical moving screw 604. Each moving block 6 has a clamping frame 7 at its top. The clamping frame 7 is made of alloy material and is used to position the moving block 6. A front and rear movable plate 703 is fixed at one end of each clamping frame 7. The front and rear movable plate 703 is made of alloy material. The front and rear movable plate 703 is used to position the front and rear movable screw 701. Each front and rear movable plate 703 is provided with a front and rear movable screw 701 inside. The front and rear movable screw 701 can drive the clamping ring 705 to move by rotation. Each front and rear movable screw 701 is provided with a clamping ring 705 at one end near the oil mass flow meter 4 to be tested. The clamping ring 705 adopts an arc structure and is made of alloy material. The clamping ring 705 is used to position the top vibration damping pad 706.

[0018] Example 2, based on Example 1, combined with... Figure 3 , Figures 6-7 , Figures 9-10As shown, a controller 101 is fixed to the top of the actual ship clamping plate 1. The controller 101 is used to record the data measured by the high-precision oil mass flow meter 2 and analyze the difference between the two to determine the accuracy of the oil mass flow meter 4 under test, thereby achieving the purpose of testing the oil mass flow meter 4 under test. An inlet pipe 202 is fixed to the left end of the high-precision oil mass flow meter 2 via a flange. The inlet pipe 202 facilitates the entry of oil into the high-precision oil mass flow meter 2. A connecting pipe 201 is fixed to the right end of the high-precision oil mass flow meter 2 via a flange. The connecting pipe 201 is made of alloy material and is used to supply the oil mass flow meter 4 under test. Flow meter 4 delivers oil. The connecting pipe 201 is fixedly connected to the connecting plate 3. The right end of the mass flow meter 4 for the oil to be measured is fixed with an outlet pipe 401 via a flange. The outlet pipe 401 facilitates the discharge of oil from the mass flow meter 4, thus completing the measurement of oil flow rate. Each adapter groove 301 has an adapter block 303 slidably connected inside. The adapter block 303 is made of alloy material and is used to position the sealing screw 304. A sealing screw 304 is fixed to the right end of each adapter block 303. The sealing screw 304 is used to position the connecting flange 402. Each sealing screw 304 is fastened to the connecting plate 3 and the connecting flange 402 by a nut. Each of the stabilizing blocks 5 has a stabilizing pad 501 fixed to its bottom. The stabilizing pad 501 is made of rubber material and can dampen vibrations for the entire platform, thus ensuring the stability of the entire platform. Each stabilizing block 5 is fastened to the solid ship clamping plate 1 by bolts. Each group of stabilizing blocks 5 is fixedly connected by a bottom stabilizing rod 504, which is made of alloy material and is used to position the moving block 6. Each left and right moving screw 502 has a bottom handle 503 fixed to its outer end. The bottom stabilizing rod 504 facilitates the rotation of the left and right moving screw 502 by the operator. Each left and right moving screw 502 is engaged with the internal thread of one end of the stabilizing block 5. A bottom bearing 505 is fixed to the inner side of the left and right moving screw 502. The bottom bearing 505 ensures that the moving block 6 can move while preventing the moving block 6 from rotating. The inner side of the outer ring of each bottom bearing 505 is fixedly connected to the moving block 6. Each moving block 6 is slidably connected to the bottom stabilizing rod 504 inside it. A vibration damping pad 601 made of rubber is fixed to the bottom of each moving block 6. The vibration damping pad 601 dampens the vibration of the moving block 6. A moving block bearing 603 is fixed to the top of each vibration damping pad 601. The moving block bearing 603 is used to position the vertical moving screw 604. The vertical moving screw 604 is fixed to the inner ring of each moving block bearing 603.The vertical moving screw 604 can drive the clamping frame 7 to rise and fall by rotating. Each vertical moving screw 604 has a vertical moving handle 605 fixed to its top, facilitating rotation of the screw. Each moving block 6 has several vertical moving positioning rods 606 fixed to its top. These vertical moving positioning rods 606 are made of alloy material and are used to position the clamping frame 7. Each set of vertical moving positioning rods 606 has a fixed top. A baffle 602, made of alloy material, ensures the stability of the vertical moving screw 604. Each vertical moving screw 604 is threadedly connected to its external clamping frame 7. Each clamping frame 7 is slidably connected to one end of its vertical moving positioning rod 606. Each front-to-back moving screw 701 is externally fixed with a front-to-back moving handle 702, which facilitates rotation of the front-to-back moving screw 701. The screw 701 is threadedly connected to the external front and rear moving plates 703. A front and rear moving bearing 707 is fixed to the inner side of each front and rear moving screw 701. The front and rear moving bearing 707 connects the front and rear moving screw 701 and the clamping ring 705. The outer ring of the inner side of each front and rear moving bearing 707 is fixedly connected to the clamping ring 705. A top vibration damping pad 706, made of rubber, is fixed to the top of each clamping ring 705. The pad 706 ensures the stability of the oil mass flow meter 4 under test and reduces vibration, thereby improving the service life of the entire platform and ensuring test accuracy. Each clamping ring 705 is also externally fixed with a front-to-back moving positioning rod 704, made of alloy material. The front-to-back moving positioning rod 704 is used to position the clamping ring 705, and each front-to-back moving positioning rod 704 is slidably connected to the front-to-back moving plate 703 at one end. When using this platform, the operator secures the high-precision oil mass flow meter 2 with bolts, further secures the inlet pipe 202 and the high-precision oil mass flow meter 2 with flanges, and further secures the connecting pipe 201 and the high-precision oil mass flow meter 2 with flanges. Then, the operator moves the adapter block 303 according to the dimensions of the connecting flange 402, thereby moving the sealing screw 304. At this time, the operator uses the sealing screw 304 and nut to tighten the connecting plate 3, the sealing gasket 302, and the connecting flange 402, thereby ensuring the sealing performance of the connecting flange 402 and the connecting plate 3. Further, the operator... The flange is used to fix the mass flow meter 4 of the oil to be tested and the outlet pipe 401. The cables of the high-precision mass flow meter 2 and the mass flow meter 4 of the oil to be tested are then connected to the controller 101, and power is supplied to both. Next, the operator uses bolts to tighten the stabilizing block 5 to the ship clamp 1. At this point, the operator rotates the bottom handle 503 according to the position and size of the mass flow meter 4 of the oil to be tested, thereby driving the left and right moving screw 502 to rotate, which in turn moves the moving block 6. Further rotation of the vertical moving handle 605 causes the mass flow meter 4 to move. The vertical moving screw 604 rotates, thereby driving the clamping frame 7 to move. Further rotation of the forward and backward moving screw 701 drives the clamping ring 705 to move, causing the top vibration damping pad 706 to press tightly against the oil mass flow meter 4 under test, thus ensuring the stability of the oil mass flow meter 4 and reducing vibration. At this time, the entire ship clamping plate 1 moves with the ship, ensuring test accuracy. The controller 101 then controls the entire platform to begin the test. At this time, oil is delivered to the high-precision oil mass flow meter 2 through the inlet pipe 202, allowing the high-precision oil mass flow meter 2 to measure the oil flow rate. The high-precision oil mass flow meter 2 transmits data to the controller 101. The oil is then transported through the connecting pipe 201 to the oil mass flow meter 4 under test, whereby the oil flow rate is measured. The oil mass flow meter 4 transmits the data back to the controller 101, and the oil flows out through the outlet pipe 401. At this point, the controller 101 can analyze the two sets of data to determine the accuracy of the oil mass flow meter 4 under test. Since the entire platform moves with the actual ship, there is no need to simulate the environment, ensuring that the oil mass flow meter 4 is in the required operating environment, thus further guaranteeing the test accuracy.

[0019] The working process of this utility model is as follows: When using this platform, the operator fixes the high-precision oil mass flow meter 2 with bolts, further fixes the inlet pipe 202 and the high-precision oil mass flow meter 2 with flanges, further fixes the connecting pipe 201 and the high-precision oil mass flow meter 2 with flanges, and then moves the adapter block 303 according to the size of the connecting flange 402, thereby moving the sealing screw 304. At this time, the operator uses the sealing screw 304 and nut to tighten the connecting plate 3, the sealing gasket 302 and the connecting flange 402, thereby ensuring the sealing performance of the connecting flange 402 and the connecting plate 3. Further, the operator secures the oil mass flow meter 4 to be tested and the outlet pipe 401 using a flange. Then, the cables of the high-precision oil mass flow meter 2 and the oil mass flow meter 4 to be tested are connected to the controller 101, and power is supplied to both. Next, the operator tightens the stabilizing block 5 to the ship clamp 1 using bolts. At this point, the operator rotates the bottom handle 503 according to the position and size of the oil mass flow meter 4 to drive the left and right moving screw 502 to rotate, thereby moving the moving block 6. Finally, the operator rotates the vertical moving handle 605. This causes the vertical moving screw 604 to rotate, thereby moving the clamping frame 7. Further rotation of the forward and backward moving screw 701 causes the clamping ring 705 to move, resulting in the top vibration damping pad 706 being in close contact with the oil mass flow meter 4 under test, thus ensuring the stability of the oil mass flow meter 4 and reducing vibration. At this time, the entire ship clamping plate 1 moves with the ship, ensuring test accuracy. Furthermore, the controller 101 controls the entire platform to start the test. At this time, the oil is delivered to the high-precision oil mass flow meter 2 through the inlet pipe 202, allowing the oil flow rate to be measured. The high-precision oil mass flow meter 2 transmits data to the controller 101. The oil is then transported through the connecting pipe 201 to the oil mass flow meter 4 under test, whereby the oil flow rate is measured. The oil mass flow meter 4 transmits data to the controller 101, and the oil flows out through the outlet pipe 401. At this point, the controller 101 can analyze the two sets of data to determine the accuracy of the oil mass flow meter 4 under test. Since the entire platform moves with the actual ship, there is no need to simulate the environment, ensuring that the oil mass flow meter 4 is in the required operating environment, thus further guaranteeing the test accuracy.

[0020] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A marine test platform for an oil mass flow meter, characterized in that: The system includes a ship clamp plate (1), on which a high-precision oil mass flow meter (2) is fastened to the top by bolts. A connecting plate (3) is located on the right end of the high-precision oil mass flow meter (2). The connecting plate (3) has several adapter slots (301) inside. A sealing gasket (302) is tightly fitted to the right end of the connecting plate (3). A connecting flange (402) is tightly fitted to the right end of the sealing gasket (302). An oil mass flow meter (4) to be tested is fixed to the right end of the connecting flange (402). The front of the oil mass flow meter (4)... Both ends are provided with a set of stabilizing blocks (5). Each stabilizing block (5) is provided with a left and right moving screw (502) inside. Each left and right moving screw (502) is provided with a moving block (6) inside. Each moving block (6) is provided with a clamping frame (7) on top. Each clamping frame (7) is fixed with a front and rear moving plate (703) at one end. Each front and rear moving plate (703) is provided with a front and rear moving screw (701) inside. Each front and rear moving screw (701) is provided with a clamping ring (705) at one end near the oil mass flow meter (4) to be tested.

2. The marine test platform for an oil mass flow meter according to claim 1, characterized in that: The top of the solid ship clamp (1) is fixed with a controller (101). The left end of the high-precision oil mass flow meter (2) is fixed with an inlet pipe (202) via a flange. The right end of the high-precision oil mass flow meter (2) is fixed with a connecting pipe (201) via a flange. The connecting pipe (201) is fixedly connected to the connecting plate (3). The right end of the oil mass flow meter to be tested (4) is fixed with an outlet pipe (401) via a flange. Each adapter groove (301) is slidably connected with an adapter block (303). Each adapter block (303) is fixed with a sealing screw (304) at its right end. Each sealing screw (304) is fastened to the connecting plate (3) and the connecting flange (402) by a nut.

3. The marine test platform for an oil mass flow meter according to claim 2, characterized in that: Each of the stabilizing blocks (5) has a stabilizing pad (501) fixed at its bottom. Each of the stabilizing blocks (5) is fastened to the solid ship clamp (1) by bolts. Each group of stabilizing blocks (5) is fixedly connected to each other by a bottom stabilizing rod (504). Each of the left and right moving screws (502) has a bottom handle (503) fixed at its outer end. Each of the left and right moving screws (502) is engaged with the internal thread of one end of the stabilizing block (5). Each of the left and right moving screws (502) has a bottom bearing (505) fixed on its inner side. The inner side of the outer ring of each bottom bearing (505) is fixedly connected to the moving block (6). Each moving block (6) is slidably connected to the bottom stabilizing rod (504) inside it.

4. The marine test platform for an oil mass flow meter according to claim 3, characterized in that: Each of the moving blocks (6) has a vibration damping pad (601) fixed at its bottom, a moving block bearing (603) fixed at its top, a vertical moving screw (604) fixed on the inner ring of each moving block bearing (603), a vertical moving handle (605) fixed at the top of each vertical moving screw (604), a plurality of vertical moving positioning rods (606) fixed at the top of each moving block (6), and a baffle (602) fixed at the top of each group of vertical moving positioning rods (606).

5. The marine test platform for an oil mass flow meter according to claim 4, characterized in that: Each of the vertical moving screws (604) is threadedly connected to the external clamping frame (7), each of the clamping frames (7) is slidably connected to the vertical moving positioning rod (606) at one end, each of the front and rear moving screws (701) is fixed with a front and rear moving handle (702) on the outside, each of the front and rear moving screws (701) is threadedly connected to the external front and rear moving plate (703), each of the front and rear moving screws (701) is fixed with a front and rear moving bearing (707) on the inside, the outer ring of the inner side of each of the front and rear moving bearings (707) is fixedly connected to the clamping ring (705), each of the clamping rings (705) is fixed with a top vibration damping pad (706) on the top, each of the clamping rings (705) is also fixed with a front and rear moving positioning rod (704) on the outside, and each of the front and rear moving positioning rods (704) is slidably connected to the front and rear moving plate (703) at one end.

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