Clamping device for testing performance of flow sensor and testing method

Abstract

The invention relates to the technical field of flow sensor clamps, and particularly discloses a clamping device for performance testing of a flow sensor, the clamping device comprises a rack, a sliding block assembly and a cover plate assembly, the cover plate assembly comprises a cover plate and four connecting columns, one end of each connecting column is fixedly connected with the cover plate, and the other end of each connecting column is movably connected with the sliding block assembly; a first groove matched with the flow sensor is formed in the bottom of the cover plate, the sliding block assembly comprises a sliding block and a gear assembly, a second groove used for installing the flow sensor is formed in the upper portion of the sliding block, and the gear assembly can drive the cover plate to be close to or away from the sliding block through the connecting column when the sliding block slides. According to the locking clamp, the first groove in the cover plate can be matched with the second groove in the sliding block to clamp or loosen the flow sensor, the locking clamp is simple in structure, one-hand operation can be achieved, the flow sensor can be rapidly clamped and fixed, and the time-saving and labor-saving effect is achieved under the condition that the flow sensor needs to be fixed frequently.

Description

Technical Field

[0001] The invention belongs to the technical field of flow sensor fixtures, and in particular relates to a clamping device and a testing method for flow sensor performance testing. Background Art

[0002] The flow sensor is a precision flow measuring instrument that can be widely used for measuring the flow of blast furnace gas, compressed air, steam and other liquids and gases. It can be used to measure the flow and total amount of liquids when matched with corresponding flow totalizing instruments. It is widely used in measurement and control systems in the fields of petroleum, chemical industry, metallurgy, scientific research, etc.

[0003] The basic function of the flow sensor flow measurement and control experimental system is to conduct characteristic test experiments on various flow measurement instruments (CMF, turbine flowmeter, ultrasonic flowmeter, electromagnetic flowmeter, etc.). Its working principle is fundamentally the black box test principle, that is, to apply excitation to the experimental object (flowmeter) from the outside, observe and obtain its response, and establish an external characteristic model based on the excitation-response relationship. To realize this principle, the entire system consists of five subsystems: flow generation device, object measurement device, flow calibration device, control system and strong power distribution system. The experimental device mainly consists of the designed flow sensor, booster pump, water valve, measuring cylinder and water pool. In the current common flow sensor test, the volume of water flowing through a certain time is measured with a measuring cylinder. The water valve needs to be adjusted to change the flow rate and the operation is repeated continuously. Therefore, the fixation of the flow sensor is very cumbersome and time-consuming. In actual operation, because the opening and closing degree of the water valve needs to be adjusted frequently, the fixed flow sensor can only be operated with one hand. Therefore, there is an urgent need for a fixture that can be operated with one hand and can quickly clamp and fix the flow sensor. Summary of the invention

[0004] The object of the present invention is to provide a clamping device and a testing method for flow sensor performance testing, so as to solve the problem that the existing flow sensor fixing steps are complicated and cannot be clamped by one hand.

[0005] The present invention is achieved through the following technical solutions: A clamping device for flow sensor performance testing, comprising a rack, a slider assembly and a cover assembly; The cover plate assembly includes a cover plate and four connecting columns, which are respectively arranged at four corners of the cover plate, one end of the connecting column is fixedly connected to the cover plate, and the other end is movably connected to the slider assembly, so that the cover plate can be lifted and lowered in the vertical direction on the slider, and a first groove cooperating with the flow sensor is provided at the bottom of the cover plate; The slider assembly includes a slider and a gear assembly. A slide groove that cooperates with the rack is provided at the bottom of the slider, and a second groove for installing the flow sensor is provided at the upper part of the slider. The gear assembly can drive the cover plate to move closer to or away from the slider through the connecting column when the slider slides, so that the first groove on the cover plate can cooperate with the second groove on the slider to clamp or loosen the flow sensor.

[0006] In some embodiments, the gear assembly includes a first gear, a worm and a second gear. The worm is arranged on the slider for rotation in a vertical direction. The first gear is coaxially fixed on the worm and meshed with the side of the rack. The connecting column is provided with gear teeth that cooperate with the second gear. The second gear meshes with the worm and the connecting column respectively.

[0007] In some embodiments, a mounting hole is provided on the slider at a position corresponding to the connecting column. The connecting column is inserted into the mounting hole and can slide in the mounting hole. An opening is provided on the side wall of the mounting hole for the second gear to engage with the connecting column.

[0008] In some embodiments, a plurality of protrusions are disposed on the inner side wall of the mounting hole, and the vertices of the protrusions are in contact with the outer side wall of the connecting column inserted into the mounting hole.

[0009] In some embodiments, a plurality of cams are disposed on the inner side wall of the mounting hole, and the cams abut against the outer side wall of the connecting column inserted into the mounting hole.

[0010] In some embodiments, a locking assembly is further included. When the slider and the cover plate are close to each other and clamp the flow sensor, the locking assembly can lock the slider to prevent the slider from sliding on the rack.

[0011] In some embodiments, the locking assembly includes a locking plate and a support frame, the support frame is fixed on the slider, the locking plate and the support frame are rotatably connected to form a lever structure, one end of the locking plate is in contact with the rack, and a locking button is provided on the front of the other end, and a spring is provided on the back.

[0012] In some embodiments, buffer pads are disposed in both the first groove and the second groove.

[0013] A flow sensor testing method, using the above-mentioned clamping device, comprises the following steps: Placing the flow sensor in the first groove on the slider; Press the locking button by hand and push the slider to slide on the rack, so that the cover moves toward the slider and clamps the flow sensor; Release the locking button.

[0014] In some embodiments, the steps of disassembling and replacing the flow sensor are also included: Press the locking button by hand and push the slider to move the cover away from the slider; Release the locking button, remove the flow sensor, and replace it with a new one; Press the locking button by hand and push the slider to clamp the cover and the slider on the flow sensor, then release the locking button.

[0015] Compared with the prior art, the present invention has the following advantages and beneficial effects: 1. The locking clamp adopts a combination of a rack and a slider, and through a gear assembly, the sliding of the slider on the rack is converted into the rotation of the gear assembly, thereby moving the connecting column engaged with the gear assembly downward, and the connecting column drives the cover plate toward the slider, clamping and fixing the flow sensor in the first groove and the second groove, thereby realizing the rapid clamping of the flow sensor; the locking clamp has a simple structure and can be operated with one hand, and can quickly clamp and fix the flow sensor, which saves time and effort when the flow sensor needs to be frequently fixed.

[0016] 2. The locking assembly of the locking clamp cleverly uses the lever principle. When the slider needs to slide left and right on the rack, you only need to press the locking button to separate the locking plate from the rack, and then you can easily slide the slider. When the slider stays at any position on the rack, release the locking button, and the locking plate contacts the rack under the action of the spring, so that the slider can be stationary on the rack, making the locking clamp hold the flow sensor more firmly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a structural schematic diagram of a locking clamp in an embodiment of the present invention; Figure 2 It is a structural schematic diagram of the slider assembly and the cover assembly of the locking fixture in an embodiment of the present invention being separated; Figure 3 It is a schematic diagram of the structure of the locking clamp and the rack in the embodiment of the present invention; Figure 4 It is a schematic diagram of the structure of the clamping of the slider assembly and the cover assembly of the locking clamp in the embodiment of the present invention; Figure 5 It is a schematic diagram of the structure of the gear assembly and the connecting column in the embodiment of the present invention; Figure 6 Schematic diagram of the structure of the first gear and the worm in the embodiment of the present invention; Figure 7This is a schematic diagram of the structure of the connecting column in an embodiment of the present invention; Figure 8 It is a structural schematic diagram of a locking assembly in an embodiment of the present invention; Fig. 9 Schematic diagram of the structure of the rack in the embodiment of the present invention.

[0019] Wherein: 1, cover plate assembly, 11, cover plate, 12, connecting column, 121, gear teeth, 13, first groove; 2. Slider assembly, 21. Slider, 22. Second groove, 23. Slide groove, 24. Mounting hole, 25. Protrusion; 3. gear assembly, 31. first gear, 32. worm, 33. second gear; 4. locking assembly, 41. locking button, 42. locking plate, 43. supporting frame, 44. spring; 5. Rack. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0021] Example 1 like Figures 1 to 9 As shown, a clamping device for flow sensor performance testing includes a rack 5, a slider assembly 2 and a cover assembly 1; The cover plate assembly 1 includes a cover plate 11 and four connecting columns 12, which are respectively arranged at the four corners of the cover plate 11 and one end of the connecting column 12 is fixedly connected to the cover plate 11, and the other end is movably connected to the slider assembly 2, so that the cover plate 11 can be lifted and lowered in the vertical direction on the slider 21. A first groove 13 cooperating with the flow sensor is provided at the bottom of the cover plate 11; The slider assembly 2 includes a slider 21 and a gear assembly 3. A slide groove 23 cooperating with the rack 5 is provided at the bottom of the slider 21. A second groove 22 for installing the flow sensor is provided at the upper portion of the slider 21. The gear assembly 3 can drive the cover plate 11 to move closer to or away from the slider 21 through the connecting column 12 when the slider 21 slides, so that the first groove 13 on the cover plate 11 can cooperate with the second groove 22 on the slider 21 to clamp or loosen the flow sensor.

[0022] The locking clamp adopts a combination of a rack 5 and a slider 21, and through the gear assembly 3, the sliding of the slider 21 on the rack 5 is converted into the rotation of the gear assembly 3, thereby causing the connecting column 12 meshing with the gear assembly 3 to move downward, and the connecting column 12 drives the cover plate 11 to approach the slider 21, clamping and fixing the flow sensor in the first groove 13 and the second groove 22, thereby realizing rapid clamping of the flow sensor; the locking clamp has a simple structure and can be operated with one hand, and can quickly clamp and fix the flow sensor, achieving the effect of saving time and effort when the flow sensor needs to be frequently fixed.

[0023] Example 2 like Figure 5 , Figure 6 and Figure 7 As shown, the gear assembly 3 includes a first gear 31, a worm 32 and a second gear 33. The worm 32 is rotatably arranged on the slider 21 along the vertical direction. The first gear 31 is coaxially fixed on the worm 32 and meshed with the side of the rack 5. The connecting column 12 is provided with gear teeth 121 that cooperate with the second gear 33. The second gear 33 meshes with the worm 32 and the connecting column 12 respectively. When the slider 21 slides, the first gear 31 will rotate accordingly, thereby driving the worm 32 to rotate, the worm 32 drives the second gear 33 to rotate, and the second gear 33 drives the connecting column 12 to move up and down, thereby driving the cover plate 11 and the slider 21 to move closer to or away from each other.

[0024] A mounting hole 24 is provided on the slider 21 at a position corresponding to the connecting column 12. The connecting column 12 is inserted into the mounting hole 24. The mounting hole 24 serves as a limit for the connecting column 12. The connecting column 12 can slide in the mounting hole 24. An opening is provided on the side wall of the mounting hole 24 for the second gear 33 to engage with the connecting column 12.

[0025] In some embodiments, reference Figure 5 A plurality of protrusions 25 are provided on the inner wall of the mounting hole 24 , and the apex of the protrusion 25 contacts the outer wall of the connecting column 12 inserted in the mounting hole 24 . The protrusion 25 is made of a relatively smooth material, so that the connecting column 12 can slide more smoothly in the mounting hole 24 .

[0026] In some embodiments, a plurality of cams are disposed on the inner wall of the mounting hole 24 , and the cams abut against the outer wall of the connecting column 12 inserted into the mounting hole 24 , which facilitates the sliding of the connecting column 12 in the mounting hole 24 .

[0027] Example 3 like Figures 1 to 4As shown, a clamping device for flow sensor performance testing also includes a locking assembly 4. When the slider 21 and the cover plate 11 are close to each other and clamp the flow sensor, the locking assembly 4 can lock the slider 21 to prevent the slider 21 from sliding on the rack 5.

[0028] like Figure 8 As shown, the locking assembly 4 includes a locking plate 42 and a support frame 43. The support frame 43 is fixed on the slider 21. The locking plate 42 and the support frame 43 are rotatably connected to form a lever structure. One end of the locking plate 42 is in contact with the rack 5, and a locking button 41 is provided on the front of the other end, and a spring 44 is provided on the back.

[0029] The locking assembly 4 of the locking clamp cleverly uses the lever principle. When the slider 21 needs to slide left and right on the rack 5, it is only necessary to press the locking button 41 to separate the locking piece 42 from the rack 5, and the slider 21 can be easily slid; when the slider 21 stays at any position on the rack 5, release the locking button 41, and the locking piece 42 contacts the rack 5 under the action of the spring 44, so that the slider 21 can be stationary on the rack 5, so that the locking clamp can clamp the flow sensor more firmly.

[0030] Example 4 Buffer pads are provided in the first groove 13 and the second groove 22 to provide a certain buffering effect on the clamped flow sensor and prevent the flow sensor from being damaged.

[0031] In some embodiments, the cushion includes but is not limited to one or more of rubber, sponge, and cotton.

[0032] A flow sensor testing method comprises the following steps: The flow sensor is placed in the first groove 13 on the slider 21; Press the locking button 41 by hand and push the slider 21 to slide on the rack 5, so that the cover plate 11 moves closer to the slider 21 and clamps the flow sensor; Release the locking button 41.

[0033] A flow sensor testing method also includes the steps of disassembling and replacing the flow sensor: Press the locking button 41 by hand and push the slider to move the cover away from the slider; Release the locking button 41, remove the flow sensor, and replace it with a new flow sensor; Press the locking button 41 by hand and push the slider 21 so that the cover plate and the slider clamp the flow sensor, and release the locking button 41 .

[0034] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. used to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship commonly placed when the product of the invention is used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0035] In addition, if the terms "horizontal" or "vertical" appear in the description of the present invention, it does not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0036] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A clamping device for flow sensor performance testing, characterized in that: It comprises a rack (5), a slider assembly (2) and a cover assembly (1); The cover plate assembly (1) comprises a cover plate (11) and four connecting columns (12), wherein the four connecting columns (12) are respectively arranged at four corners of the cover plate (11), one end of the connecting column (12) is fixedly connected to the cover plate (11), and the other end is movably connected to the slider assembly (2), so that the cover plate (11) can be raised and lowered in a vertical direction on the slider (21), and a first groove (13) cooperating with a flow sensor is provided at the bottom of the cover plate (11); The slider assembly (2) comprises a slider (21) and a gear assembly (3); a slide groove (23) cooperating with a rack (5) is provided at the bottom of the slider (21); a second groove (22) for mounting a flow sensor is provided at the top of the slider (21); and the gear assembly (3) can drive the cover plate (11) to move closer to or farther from the slider (21) via the connecting column (12) when the slider (21) slides, so that the first groove (13) on the cover plate (11) can cooperate with the second groove (22) on the slider (21) to clamp or loosen the flow sensor.

2. A clamping device for flow sensor performance testing according to claim 1, characterized in that: The gear assembly (3) comprises a first gear (31), a worm (32) and a second gear (33); the worm (32) is rotatably arranged on the slider (21) in the vertical direction; the first gear (31) is coaxially fixed to the worm (32) and meshingly connected with the side of the rack (5); the connecting column (12) is provided with gear teeth (121) that cooperate with the second gear (33); and the second gear (33) meshes with the worm (32) and the connecting column (12) respectively.

3. A clamping device for flow sensor performance testing according to claim 1, characterized in that: A mounting hole (24) is provided on the slider (21) at a position corresponding to the connecting column (12); the connecting column (12) is inserted into the mounting hole (24) and is able to slide in the mounting hole (24); and an opening for the second gear (33) to mesh with the connecting column (12) is provided on a side wall of the mounting hole (24).

4. A clamping device for flow sensor performance testing according to claim 3, characterized in that: A plurality of protrusions (25) are provided on the inner side wall of the mounting hole (24), and the vertices of the protrusions (25) are in contact with the outer side wall of a connecting column (12) inserted into the mounting hole (24).

5. The clamping device for flow sensor performance testing according to claim 3, characterized in that: A plurality of cams are arranged on the inner side wall of the mounting hole (24), and the cams abut against the outer side wall of a connecting column (12) inserted into the mounting hole (24).

6. A clamping device for flow sensor performance testing according to claim 1, characterized in that: It also comprises a locking assembly (4), and when the slider (21) and the cover plate (11) are brought close to each other and clamp the flow sensor, the locking assembly (4) can lock the slider (21) to prevent the slider (21) from sliding on the rack (5).

7. A clamping device for flow sensor performance testing according to claim 6, characterized in that: The locking assembly (4) comprises a locking plate (42) and a support frame (43), wherein the support frame (43) is fixed on the slider (21), and the locking plate (42) and the support frame (43) are rotatably connected to form a lever structure, wherein one end of the locking plate (42) is in contact with the rack (5), and a locking button (41) is provided on the front side of the other end, and a spring (44) is provided on the back side.

8. The clamping device for flow sensor performance testing according to claim 1, characterized in that: Buffer pads are provided in both the first groove (13) and the second groove (22).

9. A flow sensor testing method, characterized in that: The clamping device according to any one of claims 1 to 8 comprises the following steps: Placing the flow sensor in the first groove (13) on the slider (21); Press the locking button (41) by hand and push the slider (21) to slide on the rack (5), so that the cover plate (11) moves toward the slider (21) and clamps the flow sensor; Release the locking button (41).

10. The flow sensor testing method according to claim 9, characterized in that: It also includes the steps for disassembling and replacing the flow sensor: Press the locking button (41) by hand and push the slider in a direction to move the cover away from the slider; Release the locking button (41), remove the flow sensor, and replace it with a new one; Press the locking button (41) by hand and push the slider (21) so that the cover plate and the slider clamp the flow sensor, and release the locking button (41).

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