Device for measuring critical rolling angle of inner surface of hydrophobic pipe

Abstract

The utility model discloses a device for measuring the critical rolling angle of the inner surface of a hydrophobic pipe. The device comprises a handle rotating mechanism, a crank swing block transmission mechanism, a test platform and an angle measuring mechanism, wherein the handle rotating mechanism comprises a first rotating shaft, a second rotating shaft, a third rotating shaft, a transmission gear, a driven gear set, a driven gear and a rack; the crank and swing block transmission mechanism comprises a rotating rod, a sliding rod, a swing block and a center shaft. Wherein the rotating rod is fixedly connected with the third rotating shaft, and the rotating rod is rotationally connected with one end of the sliding rod; the other end of the sliding rod is fixedly connected with the swinging block; the swing block is arranged on the rack through the central shaft, rotates along the central shaft and is fixedly connected with the test platform; and one side of the central shaft is fixedly connected to the angle measuring mechanism. According to the utility model, the slide bar and the swing block are designed through the crank swing block transmission mechanism, so that the angle deflection process of the angle measurement mechanism is stable and controllable, and the test error is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe measurement, in particular to a device for measuring the critical rolling angle of the inner surface of a hydrophobic pipe. Background Art

[0002] Pipeline transportation is a transportation method with strong continuity, large carrying capacity and good economy. With the continuous expansion of its application field, it has been more and more widely used in the integrated supply of agricultural water and fertilizer and the material distribution in the chemical food industry. At the same time, it also requires the pipeline to have surface hydrophobicity and self-cleaning functions. Pipes with hydrophobic surfaces have a large contact angle between water and the material surface and are not easy to infiltrate. This brings advantages such as small flow resistance, impurities are not easy to adhere, and good self-cleaning effect. This can be judged by measuring the contact angle and critical rolling angle of the material surface.

[0003] The contact angle refers to the angle between the solid-liquid interface, the interior of the liquid and the gas-liquid interface, at the junction of solid, liquid and gas phases on the horizontal surface of the material; the critical rolling angle refers to the angle between the inclined surface and the horizontal plane when the droplet starts to roll on the inclined surface of the material; the larger the contact angle and the smaller the critical rolling angle, the better the hydrophobicity and self-cleaning effect of the material.

[0004] At present, the contact angle testing technology is relatively mature. Automatic shooting and analysis and measurement can be achieved using fully automatic contact angle testing equipment. However, there is no mature and professional equipment for rolling angle testing.

[0005] Prior art 201921112285.2 "A multifunctional roll angle measuring mechanism", through the rotation of the linear motor, and the bevel gear is connected to the rotating shaft of the flat plate through a multi-stage bevel gear transmission mechanism, the tilt angle of the flat plate can be adjusted, thereby obtaining a device that can freely adjust the tilt angle, which is used to measure the roll angle of the sample material surface. Although the smaller the pitch of the cylindrical bevel gear, the higher the accuracy of the flat plate angle, the start and stop of the motor has inertia, which is not conducive to the stability of the platform and affects the determination of the final tilt angle.

[0006] Prior art 202320145244.3 "A device for quickly testing the rolling angle of a droplet" uses a motor to slowly pull the traction rope at a constant speed to adjust the tilt angle of the test plate, and reads the tilt value through an angle scale to accurately measure the rolling angle of the droplet. However, this method has no transmission amplification effect, and the angle adjustment accuracy is low, which affects the measurement accuracy. Utility Model Content

[0007] The utility model provides a device for measuring the critical rolling angle of the inner surface of a hydrophobic pipe, which is used to solve the problems of unstable adjustment process and low test accuracy in the rolling angle test process of the prior art.

[0008] To achieve the above purpose, the technical solution of the utility model is as follows:

[0009] A device for measuring the critical rolling angle of the inner surface of a hydrophobic pipe comprises a handle rotating mechanism, a crank rocker transmission mechanism, a test platform and an angle measuring mechanism; wherein:

[0010] The handle rotating mechanism includes a first rotating shaft, a second rotating shaft, a third rotating shaft, a transmission gear, a driven gear set, a driven gear and a frame; wherein,

[0011] The first rotating shaft, the second rotating shaft and the third rotating shaft are parallel to each other and fixedly arranged on the frame, the transmission gear is installed on the first rotating shaft; the driven gear set is installed on the second rotating shaft, the driven gear is installed on the third rotating shaft, and the third rotating shaft is fixed on the frame to realize coaxial rotation; the driven gear set is meshed with the transmission gear and the driven gear respectively; a hand-held part is arranged on the side of the first rotating shaft away from the transmission gear;

[0012] The crank rocker transmission mechanism includes a rotating rod, a sliding rod, a rocker and a central shaft; wherein,

[0013] The rotating rod is fixedly connected to the third rotating shaft, and the rotating rod is rotatably connected to one end of the sliding rod; the other end of the sliding rod is fixedly connected to the rocking block; the rocking block is set on the frame through the central axis and rotates along the central axis, and the rocking block and the test platform are fixedly connected; one side of the central axis is fixedly connected to the angle measuring mechanism.

[0014] As a preferred technical solution of the utility model, the hand-held part is a handle.

[0015] As a preferred technical solution of the utility model, the handle rotating mechanism further includes a positioning screw, which abuts against the first rotating shaft through a threaded hole preset in the frame to lock the first rotating shaft.

[0016] As a preferred technical solution of the utility model, the frame is provided with a limiting platform near the rocking block.

[0017] As a preferred technical solution of the utility model, the crank rocker transmission mechanism also includes a hinge, and the rotating rod and the sliding rod are connected by the hinge.

[0018] As a preferred technical solution of the utility model, a through hole is provided in the middle of the rocker, and the other end of the slide rod is placed in the through hole.

[0019] As a preferred technical solution of the utility model, the test platform includes a stage and a positioning block; the stage is connected to a rocker, the central axis rotates, the rocker is located at the geometric center of the stage, and the positioning block is fixed on one side of the stage.

[0020] As a preferred technical solution of the utility model, a curved groove is provided in the middle of the positioning block.

[0021] As a preferred technical solution of the utility model, the angle measuring mechanism includes a pointer and an angle dial; the pointer is fixedly connected to the central shaft and rotates with the central shaft, and the angle dial is fixedly arranged on the frame.

[0022] As a preferred technical solution of the utility model, the angle dial is provided with scales at intervals along the circumferential direction; the pointer points to the scales, which are used together to display the rotation angle of the central axis.

[0023] Compared with the prior art, the beneficial effects of the technical solution of the utility model are:

[0024] The utility model uses a crank rocker transmission mechanism to design a slide bar and a rocker, so that the angle deflection process of the angle measuring mechanism is stable and controllable, reducing the test error. The handle rotation mechanism and the crank rocker transmission mechanism realize multi-level proportional transmission control, improving the angle deflection accuracy of the test platform. The angle measurement mechanism realizes the visualization of the angle data of the test platform deflection, which is convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings are only used for illustrative purposes and should not be construed as limitations on the present invention. In order to better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the drawings.

[0026] Figure 1 It is a schematic diagram of the overall structure of an embodiment of a device for measuring the critical rolling angle of the inner surface of a hydrophobic pipe according to the utility model;

[0027] Figure 2 It is a structural schematic diagram of a handle transmission mechanism in an embodiment of the utility model;

[0028] Figure 3 It is a structural schematic diagram of a crank rocker transmission mechanism in one embodiment of the utility model;

[0029] Figure 4 It is a structural schematic diagram of a test platform in one embodiment of the utility model;

[0030] Figure 5 This is a structural schematic diagram of an angle measuring mechanism in one embodiment of the utility model;

[0031] Figure 6 This is a schematic diagram of the structure of the pipe test in one embodiment of the utility model;

[0032] Figure 7 It is a schematic structural diagram of the central axis and the limit platform in one embodiment of the utility model.

[0033] Explanation of the accompanying drawings: 1. handle rotation mechanism; 11. handle; 12. first rotating shaft; 13. second rotating shaft; 14. third rotating shaft; 15. transmission gear; 16. driven gear set; 17. driven gear; 18. positioning screw; 19. frame; 1901. limit table; 2. crank rocker transmission mechanism; 21. rotating rod; 22. hinge; 23. sliding rod; 24. rocker; 25. center axis; 3. test platform; 31. loading platform; 32. positioning block; 4. angle measuring mechanism; 41. pointer; 42. angle dial; 5. pipe to be tested. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Example 1

[0039] For easier understanding, see Figure 1 , is an embodiment of a critical rolling angle measuring device for the inner surface of a hydrophobic pipe provided by the utility model, comprising: a handle rotating mechanism 1, a crank rocker transmission mechanism 2, a test platform 3 and an angle measuring mechanism 4; wherein:

[0040] like Figure 2 As shown, the handle rotating mechanism 1 includes a first rotating shaft 12, a second rotating shaft 13, a third rotating shaft 14, a transmission gear 15, a driven gear set 16, a driven gear 17 and a frame 19; wherein,

[0041] The first rotating shaft 12, the second rotating shaft 13, and the third rotating shaft 14 are parallel to each other and fixedly arranged on the frame 19, the transmission gear 15 is installed on the first rotating shaft 12; the driven gear set 16 is installed on the second rotating shaft 13, the driven gear 17 is installed on the third rotating shaft 14, and the third rotating shaft 14 is fixed on the frame 19 to realize coaxial rotation; the driven gear set 16 is meshed with the transmission gear 15 and the driven gear 17 respectively; a hand-held part is arranged on the side of the first rotating shaft 12 away from the transmission gear 15;

[0042] like Figure 3 As shown, the crank rocker transmission mechanism 2 includes a rotating rod 21, a sliding rod 23, a rocker 24 and a central shaft 25; wherein,

[0043] The rotating rod 21 is fixedly connected to the third rotating shaft 14, and the rotating rod 21 is rotatably connected to one end of the sliding rod 23; the other end of the sliding rod 23 is fixedly connected to the rocking block 24; the rocking block 24 is set on the frame 19 through the central axis 25, and rotates along the central axis 25, and the rocking block 24 and the test platform 3 are fixedly connected; one side of the central axis 25 is fixedly connected to the angle measuring mechanism 4.

[0044] Example 2

[0045] The solution in Example 1 is further optimized in combination with a specific working method.

[0046] like Figure 1 As shown, as a preferred implementation, based on Example 1, further, the hand-held part is a handle 11.

[0047] like Figure 2 As shown, as a preferred embodiment, based on the above-mentioned manner, further, the handle rotation mechanism 1 also includes a positioning screw 18, and the positioning screw 18 abuts against the first rotation shaft 12 through a preset threaded hole of the frame 19 to lock the first rotation shaft 12.

[0048] like Figure 7 As shown, as a preferred implementation, on the basis of the above-mentioned implementation, further, the frame 19 is provided with a limiting platform 1901 near the rocker 24 , and the limiting platform 1901 is provided on the frame 19 .

[0049] like Figure 3 As shown, as a preferred embodiment, on the basis of the above-mentioned embodiment, further, the crank rocker transmission mechanism 2 also includes a hinge 22, and the rotating rod 21 and the sliding rod 23 are connected through the hinge 22.

[0050] like Figure 3 As shown, as a preferred embodiment, on the basis of the above-mentioned manner, further, a through hole is provided in the middle of the rocker 24, and the other end of the slide rod 23 is placed in the through hole.

[0051] like Figure 4 As shown, as a preferred embodiment, on the basis of the above method, further, the test platform 3 includes a stage 31 and a positioning block 32; the stage 31 is connected to the rocker 24, the central axis 25 rotates, the rocker 24 is located at the geometric center of the stage 31, and the positioning block 32 is fixed on one side of the stage 31.

[0052] like Figure 4 As shown, as a preferred embodiment, on the basis of the above-mentioned manner, further, a curved groove is provided in the middle of the positioning block 32, and the curved groove is used to place the pipe 5 to be tested, and the pipe 5 to be tested is a cylindrical pipe.

[0053] Example 3

[0054] The schemes in Example 1 and Example 2 are further optimized in combination with specific working methods:

[0055] like Figure 5 As shown, as a preferred embodiment, on the basis of the above method, further, the angle measuring mechanism 4 includes a pointer 41 and an angle dial 42; the pointer 41 is fixedly connected to the central shaft 25 and rotates with the central shaft 25, and the angle dial 42 is fixedly set on the frame 19.

[0056] like Figure 5 As shown, as a preferred embodiment, based on the above method, further, the angle dial 42 is provided with scales at intervals along the circumferential direction; the pointer 41 points to the scales, which are used together to display the rotation angle of the central axis 25.

[0057] The deflection angle range of the test platform 3 is 0-20°, which is related to the length of the rotating rod 21 . The longer the length of the rotating rod 21 , the greater the deflection angle of the test platform 3 .

[0058] In the specific implementation process, when the handle 11 rotates one circle (360°), the driven gear set 16 is magnified four times, the driven gear 17 rotates about 90°, and the slide bar 23 drives the stage 31 to deflect by about 15°, that is, for every 10 degree rotation of the handle 11, the stage 31 deflects by 0.4°. Therefore, the utility model can greatly improve the measurement accuracy of the roll angle.

[0059] It should be noted that the implementation process of the utility model is:

[0060] The pipe 5 to be tested is cut in half and placed in the arc-surface groove of the positioning block 32 , with the end surface of the pipe abutting against the end surface of the arc-surface groove.

[0061] Initial position adjustment: Figure 6 , 7 As shown, the frame 19 is provided with a limit platform 1901 at the center axis 25. The handle 11 is rotated clockwise. Under the deceleration effect of the gear group, the rotating rod 21 rotates slowly clockwise along the third rotating axis 14, driving the slide bar 23 and the rocking block 24 to move relative to each other. The rocking block 24 is restricted by the center axis 25 and cannot move horizontally, causing the rocking block 24 to rotate counterclockwise along the center axis 25, and the loading platform 31 tends to be horizontal. The handle 11 is continuously rotated clockwise, and the lower end surface of the rocking block 24 contacts the limit platform 1901 and cannot rotate. At this time, the loading platform 31 reaches a horizontal state.

[0062] Operation process: Figure 6 As shown, a droplet is placed at the arrow position in the figure, i.e., the geometric center of the stage 31, i.e., the center of the pipe 5 to be tested, and the handle 11 is rotated counterclockwise. The process is opposite to that of the above embodiment. The stage 31 starts to rotate clockwise along the central axis 25, and the pointer 41 connected to the central axis 25 also rotates clockwise. The rolling state of the droplet is observed. When the rolling starts, the handle 11 is stopped, the positioning screw 18 is rotated to lock the first rotating axis 12, and the position of the pointer 41 on the angle dial 42 is observed to complete the measurement of the critical rolling angle.

[0063] Beneficial effects of the utility model:

[0064] The utility model proposes a critical rolling angle measuring device for the inner surface of a hydrophobic pipe. The gear reduction mechanism design can greatly reduce the angle transmission ratio and improve the platform deflection accuracy. A crank rocker structure is set up to use the relative movement of the slide bar and the rocker to bring about angle changes. The operation process is stable and the test error is reduced.

[0065] By using handle + gear transmission and referring to the principle of reduction box, the transmission angle is proportionally reduced to improve the accuracy of platform angle deflection. A crank rocker mechanism is designed to use the slide bar to drive the platform angle deflection for stable operation. A pointer is set at the center fixed point of the rocker, and the rolling angle value can be easily read with the angle dial. This measuring device has stable adjustment, high test accuracy and easy reading.

[0066] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A device for measuring the critical rolling angle of the inner surface of a hydrophobic pipe, characterized in that: It comprises a handle rotating mechanism (1), a crank rocker transmission mechanism (2), a test platform (3) and an angle measuring mechanism (4); wherein: The handle rotating mechanism (1) comprises a first rotating shaft (12), a second rotating shaft (13), a third rotating shaft (14), a transmission gear (15), a driven gear set (16), a driven gear (17) and a frame (19); wherein: The first rotating shaft (12), the second rotating shaft (13) and the third rotating shaft (14) are parallel to each other and fixedly arranged on the frame (19); the transmission gear (15) is installed on the first rotating shaft (12); the driven gear set (16) is installed on the second rotating shaft (13), the driven gear (17) is installed on the third rotating shaft (14), and the third rotating shaft (14) is fixed on the frame (19) to realize coaxial rotation; the driven gear set (16) is meshed with the transmission gear (15) and the driven gear (17) respectively; a hand-held portion is arranged on the side of the first rotating shaft (12) away from the transmission gear (15); The crank rocker transmission mechanism (2) comprises a rotating rod (21), a sliding rod (23), a rocker (24) and a central shaft (25); wherein: The rotating rod (21) is fixedly connected to the third rotating shaft (14), and the rotating rod (21) is rotatably connected to one end of the sliding rod (23); the other end of the sliding rod (23) is fixedly connected to the rocking block (24); the rocking block (24) is arranged on the frame (19) through the central axis (25) and rotates along the central axis (25), and the rocking block (24) and the test platform (3) are fixedly connected; one side of the central axis (25) is fixedly connected to the angle measuring mechanism (4).

2. A device for measuring the critical rolling angle of the inner surface of a hydrophobic pipe according to claim 1, characterized in that: The hand-held part is a handle (11).

3. The device for measuring the critical rolling angle of the inner surface of a hydrophobic pipe according to claim 1, characterized in that: The handle rotating mechanism (1) further comprises a positioning screw (18), wherein the positioning screw (18) abuts against the first rotating shaft (12) through a preset threaded hole of the frame (19) and is used to lock the first rotating shaft (12).

4. The device for measuring the critical rolling angle of the inner surface of a hydrophobic pipe according to claim 1, characterized in that: The frame (19) is provided with a limiting platform (1901) near the rocking block (24).

5. The device for measuring the critical rolling angle of the inner surface of a hydrophobic pipe according to claim 1, characterized in that: The crank rocker transmission mechanism (2) also includes a hinge (22), and the rotating rod (21) and the sliding rod (23) are connected via the hinge (22).

6. The device for measuring the critical rolling angle of the inner surface of a hydrophobic pipe according to claim 1, characterized in that: A through hole is provided in the middle of the rocker (24), and the other end of the slide rod (23) is placed in the through hole.

7. The device for measuring the critical rolling angle of the inner surface of a hydrophobic pipe according to claim 1, characterized in that: The test platform (3) comprises a stage (31) and a positioning block (32); the stage (31) is connected to a rocking block (24), the central axis (25) rotates, the rocking block (24) is located at the geometric center of the stage (31), and the positioning block (32) is fixed on one side of the stage (31).

8. The device for measuring the critical rolling angle of the inner surface of a hydrophobic pipe according to claim 7, characterized in that: A curved groove is provided in the middle of the positioning block (32).

9. The device for measuring the critical rolling angle of the inner surface of a hydrophobic pipe according to claim 1, characterized in that: The angle measuring mechanism (4) comprises a pointer (41) and an angle dial (42); the pointer (41) is fixedly connected to the central shaft (25) and rotates along with the central shaft (25); the angle dial (42) is fixedly arranged on the frame (19).

10. A device for measuring the critical rolling angle of the inner surface of a hydrophobic pipe according to claim 9, characterized in that: The angle scale (42) is provided with scales at intervals along the circumferential direction; the pointer (41) points to the scales, which are used to display the rotation angle of the central axis (25).

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