Controllable automatic heating device for measuring relative molecular mass of PAM

Abstract

The utility model relates to the field of heating devices, in particular to a controllable automatic heating device for measuring the relative molecular mass of PAM (Polyacrylamide), which comprises a water bath for placing a Ubbelohde viscometer, a controller, a fixing mechanism, a stirring mechanism, an automatic timing mechanism and a circulating heating mechanism, a cover plate is fixedly arranged at the top of the inner side of the water bath, the fixing mechanism comprises a supporting basket, two lap joint plates and two limiting assemblies, the stirring mechanism comprises a driving assembly and two stirring plates, the automatic timing mechanism comprises an automatic timer and two non-contact photoelectric liquid level sensors, and the circulating heating mechanism comprises a heating cavity, a circulating pump and a heating assembly. According to the controllable automatic heating device for measuring the relative molecular mass of the PAM, disclosed by the utility model, the Ubbelohde viscometer and the water bath can be connected together, the stability is better, frequent disassembly and assembly are not needed, and the operation convenience of an experiment is improved.

Description

Technical Field

[0001] The utility model relates to the field of heating devices, in particular to a controllable automatic heating device for measuring the relative molecular mass of PAM. Background Art

[0002] The testing methods for polymer molecular weight mainly include end group analysis, boiling point elevation and freezing point depression, vapor phase osmosis (VPO), light scattering, gel permeation chromatography (GPC), osmotic pressure, viscosity, etc. These methods have their own characteristics and are suitable for different situations and needs.

[0003] Among them, the viscosity method is the most commonly used method to measure the viscosity-average molecular weight of polymers in the laboratory. The viscosity method calculates the molecular weight of a polymer by measuring its viscosity.

[0004] However, there are the following deficiencies in the current laboratory determination of molecular weight:

[0005] 1. During the experiment, the installation steps of the Ubbelohde viscometer and the water bath were complicated, and the stability after installation was poor. The use of the two together was very inconvenient, which made the experiment very complicated.

[0006] 2. When the test solution reaches the E, F timing line, manual observation and timing are required. Automatic timing cannot be achieved, which can easily cause experimental errors.

[0007] 3. The existing water bath has no stirring mechanism inside, which is not conducive to uniform heating of the test solution and improving the measurement effect. Utility Model Content

[0008] The utility model aims to provide a controllable automatic heating device for measuring the relative molecular mass of PAM.

[0009] To achieve this purpose, the utility model adopts the following technical solutions:

[0010] supply

[0011] A controllable automatic heating device for measuring the relative molecular mass of PAM, comprising a water bath for placing an Ubbelohde viscometer, wherein the water bath is arranged vertically;

[0012] It also includes a controller, a fixing mechanism, a stirring mechanism, an automatic timing mechanism and a circulating heating mechanism;

[0013] The controller is fixed on the outer wall of the water bath;

[0014] A cover plate is fixedly provided on the inner top of the water bath, a fixing mechanism is inserted on the cover plate, the fixing mechanism comprises a support basket, two lap plates and two limit assemblies, a circular hole is opened on the top of the cover plate, the support basket is vertically inserted inside the circular hole, and the top of the support basket is overlapped with the top of the circular hole through a convex edge, the two lap plates are fixedly provided on the outer wall of the Ubbelohde viscometer, and the two limit assemblies are respectively provided between the inner wall of the support basket and the outer walls of the two lap plates;

[0015] The stirring mechanism is inserted on the cover plate, and the stirring mechanism includes a driving assembly and two stirring plates, each stirring plate is rotatably arranged on the outer wall of the cover plate through a rotating shaft, and the driving assembly is arranged between the two rotating shafts;

[0016] The automatic timing mechanism is arranged on the outer wall of the Ubbelohde viscometer, and the automatic timing mechanism includes an automatic timer and two non-contact photoelectric liquid level sensors, the two non-contact photoelectric liquid level sensors are fixedly arranged on the outer wall of the Ubbelohde viscometer, and the automatic timer is fixedly arranged on the outer wall of the water bath;

[0017] The circulating heating mechanism is arranged beside the water bath, and comprises a heating chamber, a circulating pump and a heating component. The heating component is arranged beside the water bath, and the heating chamber is arranged at the inner bottom of the water bath through a partition. The circulating pump is fixed between the heating chamber and the heating component. The automatic timer, the circulating pump, the driving component, the heating component and each non-contact photoelectric liquid level sensor are electrically connected to the controller.

[0018] Preferably, the driving assembly includes a micromotor, a belt, a driving wheel and two driven wheels. The micromotor is fixed on the top of the cover plate, the driving wheel is fixed on its output end, each driven wheel is fixed on a rotating shaft, a clamping wheel is rotatably provided on the top of the cover plate, the belt sleeve is arranged between the driving wheel, the clamping wheel and the two driven wheels, and the micromotor is electrically connected to the controller.

[0019] Preferably, the heating assembly includes an oil storage tank and an electric heating pipe, an extraction pipe and a delivery pipe are fixedly provided on the two output ends of the circulating pump, the end of the extraction pipe away from the oil storage tank is fixedly connected to the heating chamber, the oil storage tank is fixedly arranged at the end of the delivery pipe away from the circulating pump, the electric heating pipe is fixedly arranged inside the oil storage tank, and the electric heating pipe is electrically connected to the controller.

[0020] Preferably, each limiting assembly comprises a protrusion, an insertion rod and a docking block, the protrusion is fixed on the outer wall of the lap plate, the insertion rod is fixed on the bottom of the protrusion, the docking block is fixed on the inner wall of the support basket, and the insertion rod is plugged into the docking block.

[0021] Preferably, a sleeve rod is fixedly provided at the bottom of the support basket, a limiting rod is fixedly provided inside the water bath, and the limiting rod is plugged into the sleeve rod.

[0022] Preferably, a water pump is fixedly provided at the outer bottom of the water bath, two water pipes are symmetrically provided at both ends of the water pump, and the water pump is electrically connected to the controller.

[0023] Preferably, a heat-conducting block is fixedly provided at the center of the partition, and the heat-conducting block is made of metal material.

[0024] Beneficial effects of the utility model:

[0025] 1. The utility model designs a fixing mechanism, namely a support basket, two lap plates and two limit assemblies, so that the Ubbelohde viscometer and the water bath can be connected together with good stability, without the need for frequent disassembly and assembly, thereby improving the convenience of experimental operation.

[0026] 2. The utility model designs an automatic timing mechanism, namely, an automatic timer and two non-contact photoelectric liquid level sensors. The upper and lower non-contact photoelectric liquid level sensors represent the E and F timing lines respectively. When the outflow liquid level reaches the upper non-contact photoelectric liquid level sensor, the automatic timer starts timing, and when it reaches the lower non-contact photoelectric liquid level sensor, the automatic timer stops timing. Therefore, the test solution can achieve the automatic timing effect, improve the determination accuracy of the relative molecular mass of PAM, and avoid experimental errors caused by inadequate observation of the experimenter.

[0027] 3. The utility model designs a stirring mechanism, namely a driving assembly and two stirring plates, and while heating the low-temperature water above the partition, starts the micromotor through a controller, thereby driving the stirring plates on the two rotating shafts to rotate through a belt, a driving wheel and two driven wheels, stirring the water in the water bath, so that the heated water passes through the support basket to evenly heat the Ubbelohde viscometer, which is beneficial to improving the measurement effect.

[0028] 4. The utility model designs a circulating heating mechanism, namely a heating chamber, a circulating pump and a heating component, which can heat the low-temperature oil to hot oil, and exchange heat with the cold water in the water bath through the heat conduction block, so that the cold water is heated and the test solution in the Ubbelohde viscometer is heated to meet the experimental needs. After the hot oil in the heating chamber exchanges heat with the low-temperature water in the water bath through the heat conduction block each time, the low-temperature water is converted into hot water, and the hot oil is converted into cold oil. The cold oil is then sucked into the oil storage tank through the circulating pump for reheating to meet the next water bath heating operation, thereby achieving a circulation effect, saving heating costs, and thus helping to reduce measurement costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings in the embodiment of the present invention are briefly introduced below.

[0030] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0031] Figure 2 for Figure 1 A in the enlarged view;

[0032] Figure 3 It is a top view of the utility model;

[0033] Figure 4 for Figure 3 The plane section view along the BB line;

[0034] Figure 5 for Figure 4 The enlarged view of point C in the figure;

[0035] Figure 6 for Figure 4 The enlarged view of D in the figure;

[0036] Figure 7 It is a three-dimensional structural schematic diagram of the utility model without the water bath and the circulating heating mechanism;

[0037] Figure 8 for Figure 7 The enlarged view of point E in the figure;

[0038] In the figure: water bath 1, controller 2, cover plate 3, support basket 4, lap plate 5, limit assembly 6, round hole 7, convex edge 8, drive assembly 9, stirring plate 10, rotating shaft 11, automatic timer 12, non-contact photoelectric liquid level sensor 13, heating chamber 14, circulating pump 15, heating assembly 16, partition 17, micromotor 18, belt 19, driving wheel 20, driven wheel 21, tightening wheel 22, oil storage tank 23, electric heating pipe 24, extraction pipe 25, delivery pipe 26, protrusion 27, insertion rod 28, docking block 29, sleeve rod 30, limit rod 31, water pump 32, water pipe 33, heat conduction block 34. DETAILED DESCRIPTION

[0039] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0040] Among them, the drawings are only used for illustrative purposes and represent only schematic diagrams rather than actual pictures, and should not be understood as limitations on this patent; in order to better illustrate the embodiments of the present invention, some parts of the drawings will be omitted, enlarged or reduced, and do not represent the size of the actual product.

[0041] Reference Figures 1 to 8 As shown, a controllable automatic heating device for determining the relative molecular mass of PAM comprises a water bath 1 for placing an Ubbelohde viscometer, wherein the water bath 1 is arranged vertically;

[0042] It also includes a controller 2, a fixing mechanism, a stirring mechanism, an automatic timing mechanism and a circulating heating mechanism;

[0043] The controller 2 is fixed on the outer wall of the water bath 1;

[0044] A cover plate 3 is fixedly provided on the inner top of the water bath 1, and a fixing mechanism is inserted on the cover plate 3. The fixing mechanism includes a support basket 4, two lap plates 5 and two limit assemblies 6. A circular hole 7 is opened on the top of the cover plate 3. The support basket 4 is vertically inserted inside the circular hole 7, and the top of the support basket 4 is overlapped with the top of the circular hole 7 through a convex edge 8. The two lap plates 5 are fixed on the outer wall of the Ubbelohde viscometer, and the two limit assemblies 6 are respectively arranged between the inner wall of the support basket 4 and the outer walls of the two lap plates 5;

[0045] The stirring mechanism is inserted on the cover plate 3, and the stirring mechanism includes a driving assembly 9 and two stirring plates 10. Each stirring plate 10 is rotatably arranged on the outer wall of the cover plate 3 through a rotating shaft 11, and the driving assembly 9 is arranged between the two rotating shafts 11;

[0046] The automatic timing mechanism is arranged on the outer wall of the Ubbelohde viscometer, and the automatic timing mechanism includes an automatic timer 12 and two non-contact photoelectric liquid level sensors 13. The two non-contact photoelectric liquid level sensors 13 are fixedly arranged on the outer wall of the Ubbelohde viscometer, and the automatic timer 12 is fixedly arranged on the outer wall of the water bath 1;

[0047] The circulating heating mechanism is arranged beside the water bath 1, and the circulating heating mechanism includes a heating chamber 14, a circulating pump 15 and a heating component 16. The heating component 16 is arranged beside the water bath 1, and the heating chamber 14 is arranged at the inner bottom of the water bath 1 through a partition 17. The circulating pump 15 is fixed between the heating chamber 14 and the heating component 16. The automatic timer 12, the circulating pump 15, the driving component 9, the heating component 16 and each non-contact photoelectric liquid level sensor 13 are electrically connected to the controller 2.

[0048] Reference Figures 1 to 8As shown, the drive assembly 9 includes a micro motor 18, a belt 19, a driving wheel 20 and two driven wheels 21. The micro motor 18 is fixed on the top of the cover plate 3, the driving wheel 20 is fixed on its output end, each driven wheel 21 is fixed on a rotating shaft 11, and a tightening wheel 22 is rotatably provided on the top of the cover plate 3. The belt 19 is sleeved between the driving wheel 20, the tightening wheel 22 and the two driven wheels 21. The micro motor 18 is electrically connected to the controller 2. While heating the low-temperature water above the partition 17, The controller 2 starts the micromotor 18, thereby driving the stirring plates 10 on the two rotating shafts 11 to rotate through the belt 19, the driving wheel 20 and the two driven wheels 21, stirring the water in the water bath 1, so that the heated water passes through the support basket 4 to evenly heat the Ubbelohde viscometer, which is beneficial to improving the measurement effect. It should be noted that the viscosity method is a prior art, that is, common knowledge. This application only designs an automatic heating device for the Ubbelohde viscometer, and does not elaborate on the specific operation of the viscosity method. It is only necessary to observe that the test liquid naturally falls into the Ubbelohde viscometer. In the tube of the Ubbelohde viscometer, the time for the outflow liquid level to flow from the upper non-contact photoelectric liquid level sensor 13 to the lower non-contact photoelectric liquid level sensor 13 can be used to measure the relative molecular mass of PAM. The specific operation is as follows: when the test liquid passes through the non-contact photoelectric liquid level sensor 13 below the small ball of the Ubbelohde viscometer, the non-contact photoelectric liquid level sensor 13 senses that the test liquid has arrived, and sends a signal to the controller 2, thereby starting the automatic timer 12 through the controller 2 to start timing; when the test liquid passes through the non-contact photoelectric liquid level sensor 13 below the large ball of the Ubbelohde viscometer, the non-contact photoelectric liquid level sensor 13 detects that the test liquid has arrived, and sends a signal to the controller 2, thereby powering off the automatic timer 12 through the controller 2, and then reading the time count on the automatic timer 12 can measure the viscosity of PAM, and then determine the relative molecular mass of PAM. The upper and lower non-contact photoelectric liquid level sensors represent the E and F timing lines respectively, thereby achieving an automatic timing effect to avoid experimental errors caused by inadequate observation of the experimenter.

[0049] Reference Figures 1 to 8As shown, the heating assembly 16 includes an oil storage tank 23 and an electric heating pipe 24. An extraction pipe 25 and a delivery pipe 26 are fixedly arranged on the two output ends of the circulating pump 15, respectively. The end of the extraction pipe 25 away from the oil storage tank 23 is fixedly connected to the heating chamber 14. The oil storage tank 23 is fixedly arranged at the end of the delivery pipe 26 away from the circulating pump 15. The electric heating pipe 24 is fixedly arranged inside the oil storage tank 23. The electric heating pipe 24 is electrically connected to the controller 2. When the operation is good, the electric heating pipe 24 is started by the controller 2 to heat the low-temperature oil in the oil storage tank 23 until it is heated to a temperature that meets the experimental requirements. The circulating pump 15 is then started by the controller 2 to deliver the hot oil to the inside of the heating chamber 14 through the extraction pipe 25 and the delivery pipe 26. After each time the hot oil in the heating chamber 14 exchanges heat with the low-temperature water in the water bath 1 through the heat conducting block 34, the low-temperature water is converted into hot water, and the hot oil is converted into cold oil. The cold oil is then sucked into the oil storage tank 23 by the circulating pump 15 for reheating to meet the next water bath heating operation and achieve a circulation effect.

[0050] Reference Figures 1 to 8 As shown, each limiting assembly 6 includes a protrusion 27, an insertion rod 28 and a docking block 29. The protrusion 27 is fixed on the outer wall of the lap plate 5, the insertion rod 28 is fixed at the bottom of the protrusion 27, and the docking block 29 is fixed on the inner wall of the support basket 4. The insertion rod 28 is plugged into the docking block 29. When the support basket 4 and the cover plate 3 are installed, the Ubbelohde viscometer is manually inserted vertically into the interior of the support basket 4, and the insertion rod 28 at the bottom of the protrusion 27 on the outer wall of each lap plate 5 is kept plugged into a docking block 29 on the inner wall of the support basket 4, thereby realizing the fixed connection between the Ubbelohde viscometer and the device. It should be noted that the two limiting assemblies 6 are vertically distributed up and down, which can ensure that the Ubbelohde viscometer can be smoothly inserted into the interior of the support basket 4.

[0051] Reference Figures 1 to 8 As shown, a sleeve rod 30 is fixedly provided at the bottom of the support basket 4, and a limit rod 31 is fixedly provided inside the water bath 1. The limit rod 31 is plugged into the sleeve rod 30. When cold water is injected into the water bath 1, the support basket 4 is first vertically inserted into the water bath 1 from the circular hole 7, and the sleeve rod 30 is kept sleeved on the outer wall of the limit rod 31 until the bottom of the convex edge 8 on the top of the support basket 4 fits with the top of the circular hole 7, thereby realizing the installation of the support basket 4 and the cover plate 3.

[0052] Reference Figures 1 to 8 As shown, a water pump 32 is fixedly provided at the outer bottom of the water bath 1, and two water pipes 33 are symmetrically provided at both ends of the water pump 32. The water pump 32 is electrically connected to the controller 2. When the relative molecular mass of PAM is measured, the water pump 32 is first started by the controller 2, and cold water is introduced into the water bath 1 through the water pump 32 and the two water pipes 33. The liquid level of the cold water is slightly lower than the cover plate 3. When the water in the water bath 1 is dirty, the water is discharged through the water pump 32 and the two water pipes 33, and a clean water source is replaced.

[0053] Reference Figures 1 to 8 As shown, a heat conductive block 34 is fixedly provided at the center of the partition 17. The heat conductive block 34 is made of metal material. When the hot oil is transported to the inside of the heating chamber 14, the heat of the hot oil is transferred to the top of the partition 17 through the heat conductive block 34, and the low-temperature water above the partition 17 is heated to meet the experimental requirements.

Claims

1. A controllable automatic heating device for determining the relative molecular mass of PAM, comprising a water bath (1) for placing an Ubbelohde viscometer, the water bath (1) being arranged vertically, characterized in that: It also includes a controller (2), a fixing mechanism, a stirring mechanism, an automatic timing mechanism and a circulating heating mechanism; The controller (2) is fixedly mounted on the outer wall of the water bath (1); A cover plate (3) is fixedly provided on the inner top of the water bath (1), a fixing mechanism is inserted on the cover plate (3), the fixing mechanism comprises a support basket (4), two lap plates (5) and two limit assemblies (6), a circular hole (7) is opened on the top of the cover plate (3), the support basket (4) is vertically inserted inside the circular hole (7), and the top of the support basket (4) is overlapped with the top of the circular hole (7) through a convex edge (8), the two lap plates (5) are fixed on the outer wall of the Ubbelohde viscometer, and the two limit assemblies (6) are respectively arranged between the inner wall of the support basket (4) and the outer walls of the two lap plates (5); The stirring mechanism is inserted on the cover plate (3), and comprises a driving assembly (9) and two stirring plates (10). Each stirring plate (10) is rotatably arranged on the outer wall of the cover plate (3) via a rotating shaft (11), and the driving assembly (9) is arranged between the two rotating shafts (11); The automatic timing mechanism is arranged on the outer wall of the Ubbelohde viscometer, and the automatic timing mechanism comprises an automatic timer (12) and two non-contact photoelectric liquid level sensors (13). The two non-contact photoelectric liquid level sensors (13) are both fixedly arranged on the outer wall of the Ubbelohde viscometer, and the automatic timer (12) is fixedly arranged on the outer wall of the water bath (1); The circulating heating mechanism is arranged beside the water bath (1), and comprises a heating chamber (14), a circulating pump (15) and a heating component (16). The heating component (16) is arranged beside the water bath (1). The heating chamber (14) is arranged at the inner bottom of the water bath (1) through a partition (17). The circulating pump (15) is fixedly arranged between the heating chamber (14) and the heating component (16). The automatic timer (12), the circulating pump (15), the driving component (9), the heating component (16) and each non-contact photoelectric liquid level sensor (13) are all electrically connected to the controller (2).

2. A controllable automatic heating device for determining the relative molecular mass of PAM according to claim 1, characterized in that: The drive assembly (9) comprises a micromotor (18), a belt (19), a driving wheel (20) and two driven wheels (21); the micromotor (18) is fixedly arranged on the top of the cover plate (3); the driving wheel (20) is fixedly arranged on its output end; each driven wheel (21) is fixedly arranged on a rotating shaft (11); a retaining wheel (22) is rotatably arranged on the top of the cover plate (3); the belt (19) is sleeved between the driving wheel (20), the retaining wheel (22) and the two driven wheels (21); and the micromotor (18) is electrically connected to the controller (2).

3. A controllable automatic heating device for determining the relative molecular mass of PAM according to claim 2, characterized in that: The heating assembly (16) comprises an oil storage tank (23) and an electric heating pipe (24); an extraction pipe (25) and a delivery pipe (26) are fixedly provided at two output ends of the circulation pump (15), respectively; one end of the extraction pipe (25) away from the oil storage tank (23) is fixedly connected to the heating chamber (14); the oil storage tank (23) is fixedly arranged at one end of the delivery pipe (26) away from the circulation pump (15); the electric heating pipe (24) is fixedly arranged inside the oil storage tank (23); and the electric heating pipe (24) is electrically connected to the controller (2).

4. A controllable automatic heating device for determining the relative molecular mass of PAM according to claim 3, characterized in that: Each limiting assembly (6) comprises a protrusion (27), an insertion rod (28) and a docking block (29); the protrusion (27) is fixedly arranged on the outer wall of the lap plate (5); the insertion rod (28) is fixedly arranged on the bottom of the protrusion (27); the docking block (29) is fixedly arranged on the inner wall of the support basket (4); and the insertion rod (28) is plugged into the docking block (29).

5. A controllable automatic heating device for determining the relative molecular mass of PAM according to claim 4, characterized in that: A sleeve rod (30) is fixedly provided at the bottom of the support basket (4), and a limit rod (31) is fixedly provided inside the water bath (1), wherein the limit rod (31) is plugged into the sleeve rod (30).

6. A controllable automatic heating device for determining the relative molecular mass of PAM according to claim 5, characterized in that: A water pump (32) is fixedly provided on the outer bottom of the water bath (1), two water pipes (33) are symmetrically provided at both ends of the water pump (32), and the water pump (32) is electrically connected to the controller (2).

7. A controllable automatic heating device for determining the relative molecular mass of PAM according to claim 6, characterized in that: A heat conducting block (34) is fixedly provided at the center of the partition (17), and the heat conducting block (34) is made of a metal material.

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