Online viscosity detection device for polyurethane adhesive production

Abstract

The invention discloses an on-line viscosity detection device for polyurethane adhesive production, which relates to the technical field of polyurethane adhesive production, and comprises a vertical plate welded on the outer wall of the rear side of a hollow base, a sampling container placed on the top of the hollow base, a height adjusting mechanism, an on-line viscosity detection mechanism and a centering positioning mechanism, the online viscosity detection mechanism comprises a viscosity detector, a fixed cover, a shaft body, a detection probe, a stirring rod and a variable-speed driving assembly. In the detection process, the rotating speed of the variable frequency motor is changed by inputting different rotating speed values on the viscosity detector, so that the stirring speed of the stirring rod can be flexibly adjusted, and the problem that the fixed rotating speed possibly cannot adapt to the large-range change of the viscosity of the material is solved. And the measurement result is not accurate. The quick-release connecting structure is arranged, so that the detection probe can be conveniently disassembled and assembled, and the detection probe can be conveniently disassembled, cleaned and maintained at regular intervals.

Description

Technical Field

[0001] The invention relates to the technical field of polyurethane adhesive production, and in particular to an online viscosity detection device for polyurethane adhesive production. Background Art

[0002] During the production process of polyurethane adhesives, viscosity testing is required to ensure that the viscosity of polyurethane adhesives meets the standards. At present, the detection method of online viscosity testers is mainly that the rotor rotates in the fluid and is affected by the resistance of the fluid. This resistance is proportional to the viscosity of the fluid. The sensor inside the detection probe converts the rotational resistance of the rotor into an electrical signal, which is transmitted to the detection instrument for processing, and finally the viscosity value of the fluid is obtained. However, the existing online viscosity detection device still has the following problems in actual operation:

[0003] First, the rotor is usually in use at a fixed speed, which may not be able to adapt to the wide range of changes in material viscosity, resulting in inaccurate measurement results;

[0004] Secondly, the detection probe is not easy to disassemble and assemble, and thus it is impossible to regularly disassemble, clean and maintain the detection probe. It is also not easy to flexibly adjust the detection depth of the detection probe, so there is a problem of incomplete detection. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides an online viscosity detection device for the production of polyurethane adhesives, which effectively solves the problem that the rotor of the existing online viscosity detection device usually has a fixed rotation speed when in use, which may not be able to adapt to a large range of changes in the viscosity of the material, resulting in inaccurate measurement results. It also solves the problem that the detection probe of the existing online viscosity detection device is not easy to disassemble and assemble, and thus the detection probe cannot be disassembled, cleaned and maintained regularly, and it is also not easy to flexibly adjust the detection depth of the detection probe, resulting in the problem of insufficient detection.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] An online viscosity detection device for polyurethane adhesive production, comprising a vertical plate welded to the rear outer wall of a hollow base, a sampling container placed on the top of the hollow base, a height adjustment mechanism, an online viscosity detection mechanism and a centering positioning mechanism;

[0008] The online viscosity detection mechanism comprises a viscosity detector, a fixed cover fixedly mounted on the outer wall of the bottom of the viscosity detector, a shaft body rotatably mounted on the bottom of the fixed cover, a detection probe connected to the bottom end of the shaft body through a quick-release connection structure, a stirring rod fixedly connected to the outer wall of the shaft body, and a variable speed drive assembly arranged on the fixed cover;

[0009] The variable speed drive assembly includes a variable frequency motor fixedly mounted on the side wall of the fixed cover, a driving bevel gear fixedly sleeved on the output shaft of the variable frequency motor, and a driven bevel gear fixedly sleeved on the top end of the shaft body;

[0010] The quick-release connection structure comprises a connecting sleeve concentrically fixed to the bottom end of the shaft body, a positioning head concentrically fixed to the top end of the detection probe, two pressed-in ball head plungers installed in the positioning head and two positioning grooves opened in the connecting sleeve.

[0011] Preferably, the output shaft of the variable frequency motor passes through one side of the fixed cover, and the driving bevel gear and the driven bevel gear are meshed with each other and are both located inside the fixed cover.

[0012] Preferably, the variable frequency motor is electrically connected to the viscosity detector, and the detection probe is electrically connected to the viscosity detector by wireless transmission.

[0013] Preferably, a heat dissipation fan is fixedly installed on the top of the viscosity tester, and evenly distributed heat dissipation ports are opened on one side of the viscosity tester.

[0014] Preferably, the height adjustment mechanism includes a servo control component, a lifting channel opened in front of the vertical plate, an adjustment screw rotatably installed in the lifting channel and an adjustment seat screwed to the upper part of the adjustment screw, and the viscosity tester is fixedly installed on the front outer wall of the adjustment seat.

[0015] Preferably, the outer wall of the adjustment seat is slidably connected to the inner wall of the lifting channel.

[0016] Preferably, the servo control assembly includes a motor support welded to the upper outer wall of the rear side of the vertical plate, a servo motor fixedly mounted on the top outer wall of the motor support, a worm fixedly mounted on the output shaft of the servo motor, and a worm wheel fixedly mounted on the top of the adjusting screw and meshing with the worm.

[0017] Preferably, the centering positioning mechanism includes a driver, a guide structure, a bidirectional screw rotatably installed in a hollow base, two sliding members symmetrically threaded on two opposite threaded ends of the bidirectional screw, and two V-shaped positioning blocks symmetrically fixed to the outer walls of adjacent sides of the two sliding members.

[0018] Preferably, the driver includes a mounting shell fixed to the side wall of the hollow base, a stepper motor fixedly mounted on the side wall of the mounting shell, a driving pulley fixedly mounted on the output shaft of the stepper motor, and a driven pulley fixedly mounted on one end of the bidirectional screw, and the driving pulley and the driven pulley are connected by the same transmission belt.

[0019] Preferably, the guide structure includes two guide shafts symmetrically fixed in the hollow base and two guide openings symmetrically opened on the top of the hollow base. Two guide holes are opened on the two sliding members. The inner walls of the two guide holes are respectively slidably connected to the outer walls of the two guide shafts, and the two sliding members are slidably connected to the two guide openings.

[0020] The beneficial effects of the present invention are:

[0021] 1. In the detection process, the present invention changes the speed of the variable frequency motor by inputting different speed values ​​on the viscosity tester, and then can flexibly adjust the stirring speed of the stirring rod, thereby solving the problem that a fixed speed may not be able to adapt to a large range of changes in material viscosity, resulting in inaccurate measurement results;

[0022] 2. The present invention is provided with a quick-release connection structure, which can facilitate the disassembly and assembly of the detection probe, thereby facilitating the regular disassembly, cleaning and maintenance of the detection probe. In addition, through the cooperation of the heat dissipation fan and the heat dissipation port, the heat dissipation performance of the viscosity tester during operation can be effectively improved, ensuring the normal internal operating temperature of the viscosity tester;

[0023] 3. The present invention is provided with a height adjustment mechanism, which enables the entire online viscosity detection mechanism to perform lifting and lowering movements, so as to facilitate flexible adjustment of the detection depth of the detection probe to improve the comprehensiveness of the detection;

[0024] 4. The present invention is provided with a centering positioning mechanism, which can effectively position sampling containers of different specifications through two centering V-shaped positioning blocks, thereby avoiding accidental movement of the sampling containers and facilitating stability during viscosity testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0026] Figure 1 It is a schematic diagram of the overall front-view three-dimensional structure of the present invention;

[0027] Figure 2 It is a three-dimensional enlarged structural schematic diagram of the online viscosity detection mechanism in the present invention;

[0028] Figure 3 It is a three-dimensional enlarged structural schematic diagram of the bottom view of the viscosity detector in the present invention;

[0029] Figure 4It is a three-dimensional enlarged structural schematic diagram after the front edge of the fixed cover in the present invention is cut off;

[0030] Figure 5 It is a three-dimensional enlarged structural schematic diagram of the positioning head and the connecting sleeve in the separated state in the present invention;

[0031] Figure 6 It is a three-dimensional enlarged structural schematic diagram of the servo control component in the present invention;

[0032] Figure 7 It is a three-dimensional enlarged structural schematic diagram of the top area of ​​the hollow base of the present invention;

[0033] Figure 8 It is a three-dimensional enlarged structural schematic diagram of the inner area of ​​the hollow base of the present invention;

[0034] Fig. 9 It is a three-dimensional enlarged structural schematic diagram of some parts of the centering and positioning mechanism in the present invention.

[0035] In the figure: 1. hollow base; 2. vertical plate; 3. sampling container; 4. viscosity tester; 5. fixed cover; 6. shaft; 7. detection probe; 8. stirring rod; 9. frequency conversion motor; 10. active bevel gear; 11. driven bevel gear; 12. connecting sleeve; 13. positioning head; 14. press-fit ball plunger; 15. positioning groove; 16. lifting channel; 17. adjusting screw; 18. adjusting seat; 19. motor support; 20. servo motor; 21. worm; 22. worm wheel; 23. bidirectional screw; 24. sliding part; 25. V-shaped positioning block; 26. mounting shell; 27. stepping motor; 28. active pulley; 29. ​​driven pulley; 30. transmission belt; 31. guide shaft; 32. guide port; 33. cooling fan; 34. cooling port. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be described clearly and completely 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, rather than all the embodiments.

[0037] Example 1, reference Figure 1-5 , an online viscosity detection device for polyurethane adhesive production, comprising a vertical plate 2 welded to the rear outer wall of a hollow base 1, a sampling container 3 placed on the top of the hollow base 1 and an online viscosity detection mechanism, wherein the sampling container 3 is used for the presence of a polyurethane adhesive fluid to be detected;

[0038] Specifically, the online viscosity detection mechanism includes a viscosity detector 4, a fixed cover 5 fixedly mounted on the outer wall of the bottom of the viscosity detector 4, a shaft body 6 rotatably mounted on the bottom of the fixed cover 5, a detection probe 7 connected to the bottom end of the shaft body 6 through a quick-release connection structure, a stirring rod 8 fixedly connected to the outer wall of the shaft body 6, and a variable speed drive assembly provided on the fixed cover 5;

[0039] Furthermore, the variable speed drive assembly includes a variable frequency motor 9 fixedly mounted on the side wall of the fixed cover 5, a driving bevel gear 10 fixedly sleeved on the output shaft of the variable frequency motor 9, and a driven bevel gear 11 fixedly sleeved on the top end of the shaft body 6;

[0040] Furthermore, the quick-release connection structure includes a connection sleeve 12 concentrically fixed to the bottom end of the shaft body 6, a positioning head 13 concentrically fixed to the top end of the detection probe 7, two press-fit ball head plungers 14 installed in the positioning head 13, and two positioning grooves 15 provided in the connection sleeve 12. The quick-release connection structure can facilitate the disassembly and assembly of the detection probe 7, and facilitate the regular disassembly, cleaning and maintenance of the detection probe 7.

[0041] Furthermore, the output shaft of the variable frequency motor 9 passes through one side of the fixed cover 5, the active bevel gear 10 and the driven bevel gear 11 mesh with each other and are both located in the fixed cover 5, the variable frequency motor 9 is electrically connected to the viscosity detector 4, and the detection probe 7 is electrically connected to the viscosity detector 4 by wireless transmission;

[0042] Furthermore, a heat dissipation fan 33 is fixedly installed on the top of the viscosity tester 4, and evenly distributed heat dissipation ports 34 are opened on one side of the viscosity tester 4. Through the cooperation of the heat dissipation fan 33 and the heat dissipation ports 34, the heat dissipation performance of the viscosity tester 4 during operation can be effectively improved, and the normal operating temperature inside the viscosity tester 4 can be ensured;

[0043] In the specific implementation of this embodiment: the active bevel gear 10 is driven to rotate by the variable frequency motor 9, and then the driven bevel gear 11 meshing with the active bevel gear 10 drives the stirring rod 8 on the shaft body 6 and the detection probe 7 to rotate in the sampling container 3, and then the stirring rod 8 rotates in the polyurethane adhesive fluid and is affected by the resistance of the fluid. This resistance is proportional to the viscosity of the fluid. The sensor in the detection probe 7 converts the rotational resistance into an electrical signal and transmits it to the viscosity tester 4 for processing, and finally the viscosity value of the polyurethane adhesive fluid is obtained. In the detection process, the speed of the variable frequency motor 9 is changed by inputting different speed values ​​on the viscosity tester 4, so that the stirring speed of the stirring rod 8 can be flexibly adjusted, thereby solving the problem that a fixed speed may not be able to adapt to a large range of changes in the viscosity of the material, resulting in inaccurate measurement results.

[0044] Example 2, reference Figure 1 , Figure 3 and Figure 6 , This embodiment is optimized on the basis of embodiment 1, specifically: an online viscosity detection device for polyurethane adhesive production, further comprising a height adjustment mechanism;

[0045] Specifically, the height adjustment mechanism includes a servo control assembly, a lifting channel 16 opened in front of the vertical plate 2, an adjustment screw 17 rotatably installed in the lifting channel 16, and an adjustment seat 18 screwed to the upper part of the adjustment screw 17, and the viscosity detector 4 is fixedly installed on the front outer wall of the adjustment seat 18;

[0046] Furthermore, the outer wall of the adjustment seat 18 is slidably connected to the inner wall of the lifting channel 16, and the servo control assembly includes a motor support 19 welded to the upper outer wall of the rear side of the vertical plate 2, a servo motor 20 fixedly mounted on the top outer wall of the motor support 19, a worm 21 fixedly mounted on the output shaft of the servo motor 20, and a worm wheel 22 fixedly mounted on the top of the adjustment screw 17 and meshing with the worm 21;

[0047] In the specific implementation of this embodiment: the servo motor 20 drives the worm 21 to rotate forward or reverse, and then the worm wheel 22 engaged with the worm 21 will drive the adjusting screw 17 to rotate forward or reverse, and then under the limit of the lifting channel 16, the adjusting seat 18 threadedly connected to the adjusting screw 17 will drive the entire online viscosity detection mechanism to perform lifting and lowering movements, so that it is convenient to flexibly adjust the detection depth of the detection probe 7 to improve the comprehensiveness of the detection.

[0048] Example 3, reference Figure 1 and Figure 7-9 , This embodiment is optimized on the basis of embodiment 1, specifically: an online viscosity detection device for polyurethane adhesive production, further comprising a centering positioning mechanism;

[0049] Specifically, the centering and positioning mechanism includes a driver, a guide structure, a bidirectional screw 23 rotatably installed in the hollow base 1, two sliding members 24 symmetrically screwed on two opposite threaded ends of the bidirectional screw 23, and two V-shaped positioning blocks 25 symmetrically fixed to the outer walls of the adjacent sides of the two sliding members 24;

[0050] Furthermore, the driver includes a mounting shell 26 fixed to the side wall of the hollow base 1, a stepper motor 27 fixedly mounted on the side wall of the mounting shell 26, a driving pulley 28 fixedly mounted on the output shaft of the stepper motor 27, and a driven pulley 29 fixedly mounted on one end of the bidirectional screw 23, and the driving pulley 28 and the driven pulley 29 are connected by the same transmission belt 30;

[0051] Furthermore, the guide structure includes two guide shafts 31 symmetrically fixed in the hollow base 1 and two guide openings 32 symmetrically opened on the top of the hollow base 1. Two guide holes are opened on the two sliding members 24. The inner walls of the two guide holes are respectively slidably connected to the outer walls of the two guide shafts 31. The two sliding members 24 are slidably connected to the two guide openings 32. The guide structure can ensure the stability of the linear motion of the two sliding members 24.

[0052] During the specific implementation of this embodiment: the driving pulley 28 is driven to rotate by the stepping motor 27, and then under the transmission effect of the transmission belt 30, the driven pulley 29 will drive the bidirectional screw 23 to rotate, and then under the guidance of the guide structure, the two sliding members 24 threadedly connected to the bidirectional screw 23 will drive the two V-shaped positioning blocks 25 to align and clamp the sampling container 3 placed on the hollow base 1, thereby avoiding accidental movement of the sampling container 3, which is beneficial to ensuring stability during the viscosity detection process.

[0053] The use process of the present invention is as follows: first, the driving pulley 28 is driven to rotate by the stepping motor 27, and then the driven pulley 29 drives the bidirectional screw 23 to rotate under the transmission effect of the transmission belt 30, and then under the guidance of the guide structure, the two sliding members 24 threadedly connected with the bidirectional screw 23 drive the two V-shaped positioning blocks 25 to center and clamp the sampling container 3 placed on the hollow base 1, thereby avoiding the accidental movement of the sampling container 3, which is conducive to ensuring the stability during the viscosity detection process;

[0054] Secondly, the servo motor 20 drives the worm 21 to rotate forward or reverse, and then the worm wheel 22 meshing with the worm 21 drives the adjusting screw 17 to rotate forward or reverse, and then under the limit of the lifting channel 16, the adjusting seat 18 threadedly connected with the adjusting screw 17 drives the entire online viscosity detection mechanism to perform lifting and lowering movements, so that the detection depth of the detection probe 7 can be flexibly adjusted to improve the comprehensiveness of the detection;

[0055] Finally, the active bevel gear 10 is driven to rotate by the variable frequency motor 9, and then the driven bevel gear 11 meshing with the active bevel gear 10 drives the stirring rod 8 on the shaft 6 and the detection probe 7 to rotate in the sampling container 3. Then, the stirring rod 8 rotates in the polyurethane adhesive fluid and is affected by the resistance of the fluid. This resistance is proportional to the viscosity of the fluid. The sensor in the detection probe 7 converts the rotational resistance into an electrical signal, which is transmitted to the viscosity tester 4 for processing, and finally the viscosity value of the polyurethane adhesive fluid is obtained.

[0056] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end", etc. are 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, rather than indicating or implying 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 limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0057] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An online viscosity detection device for polyurethane adhesive production, comprising a vertical plate (2) welded to the rear outer wall of a hollow base (1) and a sampling container (3) placed on the top of the hollow base (1), characterized in that: It also includes a height adjustment mechanism, an online viscosity detection mechanism and a centering and positioning mechanism; The online viscosity detection mechanism comprises a viscosity detector (4), a fixed cover (5) fixedly mounted on the outer wall of the bottom of the viscosity detector (4), a shaft (6) rotatably mounted on the bottom of the fixed cover (5), a detection probe (7) connected to the bottom end of the shaft (6) via a quick-release connection structure, a stirring rod (8) fixedly connected to the outer wall of the shaft (6), and a variable speed drive assembly provided on the fixed cover (5); The variable speed drive assembly comprises a variable frequency motor (9) fixedly mounted on the side wall of the fixed cover (5), a driving bevel gear (10) fixedly sleeved on the output shaft of the variable frequency motor (9), and a driven bevel gear (11) fixedly sleeved on the top end of the shaft body (6); The quick-release connection structure comprises a connection sleeve (12) coaxially fixed to the bottom end of the shaft body (6), a positioning head (13) coaxially fixed to the top end of the detection probe (7), two pressed-in ball head plungers (14) installed in the positioning head (13), and two positioning grooves (15) provided in the connection sleeve (12).

2. The online viscosity detection device for polyurethane adhesive production according to claim 1, characterized in that: The output shaft of the variable frequency motor (9) passes through one side of the fixed cover (5), and the driving bevel gear (10) and the driven bevel gear (11) are meshed with each other and are both located inside the fixed cover (5).

3. The online viscosity detection device for polyurethane adhesive production according to claim 1, characterized in that: The variable frequency motor (9) is electrically connected to the viscosity detector (4), and the detection probe (7) is electrically connected to the viscosity detector (4) by wireless transmission.

4. The online viscosity detection device for polyurethane adhesive production according to claim 1, characterized in that: A heat dissipation fan (33) is fixedly installed on the top of the viscosity detector (4), and evenly distributed heat dissipation ports (34) are opened on one side of the viscosity detector (4).

5. The online viscosity detection device for polyurethane adhesive production according to claim 1, characterized in that: The height adjustment mechanism comprises a servo control component, a lifting channel (16) opened in front of the vertical plate (2), an adjustment screw (17) rotatably installed in the lifting channel (16) and an adjustment seat (18) screwed to the upper part of the adjustment screw (17), and the viscosity detector (4) is fixedly installed on the front outer wall of the adjustment seat (18).

6. An online viscosity detection device for polyurethane adhesive production according to claim 5, characterized in that: The outer wall of the adjustment seat (18) is slidably connected to the inner wall of the lifting channel (16).

7. The online viscosity detection device for polyurethane adhesive production according to claim 1, characterized in that: The servo control assembly comprises a motor support (19) welded to the upper outer wall of the rear side of the vertical plate (2), a servo motor (20) fixedly mounted on the top outer wall of the motor support (19), a worm (21) fixedly mounted on the output shaft of the servo motor (20), and a worm wheel (22) fixedly mounted on the top of the adjusting screw (17) and meshing with the worm (21).

8. The online viscosity detection device for polyurethane adhesive production according to claim 1, characterized in that: The centering and positioning mechanism comprises a driver, a guide structure, a bidirectional screw (23) rotatably mounted in a hollow base (1), two sliding members (24) symmetrically threadedly connected to two opposite threaded ends of the bidirectional screw (23), and two V-shaped positioning blocks (25) symmetrically fixed to the outer walls of adjacent sides of the two sliding members (24).

9. An online viscosity detection device for polyurethane adhesive production according to claim 8, characterized in that: The driver comprises a mounting shell (26) fixed to the side wall of the hollow base (1), a stepping motor (27) fixedly mounted on the side wall of the mounting shell (26), a driving pulley (28) fixedly mounted on the output shaft of the stepping motor (27), and a driven pulley (29) fixedly mounted on one end of a bidirectional screw (23), and the driving pulley (28) and the driven pulley (29) are connected in transmission via the same transmission belt (30).

10. An online viscosity detection device for polyurethane adhesive production according to claim 8, characterized in that: The guide structure comprises two guide shafts (31) symmetrically fixed in the hollow base (1) and two guide openings (32) symmetrically opened at the top of the hollow base (1); two guide holes are opened on the two sliding members (24); the inner walls of the two guide holes are respectively slidably connected to the outer walls of the two guide shafts (31), and the two sliding members (24) are slidably connected to the two guide openings (32).

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