CN113042123B - Flow passage structure for improving temperature field index of thermostatic bath - Google Patents
Flow passage structure for improving temperature field index of thermostatic bath Download PDFInfo
- Publication number
- CN113042123B CN113042123B CN202110281153.8A CN202110281153A CN113042123B CN 113042123 B CN113042123 B CN 113042123B CN 202110281153 A CN202110281153 A CN 202110281153A CN 113042123 B CN113042123 B CN 113042123B
- Authority
- CN
- China
- Prior art keywords
- spiral
- flow guide
- paddle
- stirring
- cavity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L7/00—Heating or cooling apparatus; Heat insulating devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L7/00—Heating or cooling apparatus; Heat insulating devices
- B01L7/50—Cryostats
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K15/00—Testing or calibrating of thermometers
- G01K15/002—Calibrated temperature sources, temperature standards therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K15/00—Testing or calibrating of thermometers
- G01K15/005—Calibration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2300/00—Additional constructional details
- B01L2300/18—Means for temperature control
- B01L2300/1838—Means for temperature control using fluid heat transfer medium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2300/00—Additional constructional details
- B01L2300/18—Means for temperature control
- B01L2300/1838—Means for temperature control using fluid heat transfer medium
- B01L2300/185—Means for temperature control using fluid heat transfer medium using a liquid as fluid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2300/00—Additional constructional details
- B01L2300/18—Means for temperature control
- B01L2300/1894—Cooling means; Cryo cooling
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
Landscapes
- Health & Medical Sciences (AREA)
- Clinical Laboratory Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Abstract
The runner structure for improving the temperature field index of the thermostatic bath comprises a bath cavity inner container, a stirring unit, a flow guide unit and a heater, wherein the bath cavity inner container is divided into a stirring cavity and a working cavity by a vertically arranged middle partition plate, a gap for a heat transfer medium to pass through is reserved between the upper end and the lower end of the middle partition plate and the upper end and the lower end of the bath cavity inner container, the main parts of the stirring unit and the heater are positioned in the stirring cavity, and the flow guide unit is arranged in the working cavity and is arranged on the middle partition plate; the flow guide unit comprises a preposed flow guide cylinder and a spiral flow guide cover, wherein the preposed flow guide cylinder is integrally arranged up and down, the spiral flow guide cover is fixed at the lower end of the preposed flow guide cylinder, a spiral blade mechanism is arranged in the spiral flow guide cover, when the spiral flow guide unit works, a part of heat transfer medium enters the preposed flow guide cylinder after spirally rising through the spiral blade mechanism, and the other part of heat transfer medium enters an interlayer between the preposed flow guide cylinder and the wall of the working inner cavity through a flow guide hole at the top end outside the spiral flow guide cover.
Description
Technical Field
The invention relates to the technical field of thermostatic baths, in particular to a flow channel structure for improving the temperature field index of a thermostatic bath.
Background
The constant temperature bath is used for providing equipment with a constant temperature test environment and is often used for verifying various temperature sensors. With the development of society, new requirements are made on the calibration of a temperature sensor, and the existing thermostatic bath has poor temperature field indexes and is difficult to meet market demands. Current thermostatic bath structure is mostly the side stirring structure, and the main part is single vallecular cavity inner bag, and the vallecular cavity inner bag divide into two cavitys, working chamber and stirring chamber through intermediate bottom. The flowing direction of the medium is from top to bottom in the stirring cavity and from bottom to top in the working cavity. The circulating flow channel used by the existing thermostatic bath has a simple structure, the uniformity of a heat transfer medium in the thermostatic bath is poor, the temperature uniformity and the volatility index of the thermostatic bath are low, and the temperature calibration work with high standard requirements cannot be met.
Chinese patent application CN 101116835 a discloses a thermostatic bath for constant temperature experiment, in this patent, the bath body is divided into two cavities, one of which is used as the working area, and the stirring paddle is installed in the other cavity to form a single circulation of a medium, but the flow direction of the medium in the working area is still one-way flow in this patent, which cannot ensure the effective mixing of the medium.
Chinese patent application CN 101284251 a discloses a thermostatic bath based on cold and hot liquid mixing temperature control, in this patent, the thermostatic bath is divided into a working area and a temperature adjusting area, the middle is separated by a metal partition plate with holes, a stirrer is provided with stirring paddles in the temperature adjusting area and the working area, the temperature adjusting area carries out horizontal stirring, the working area carries out a stirring working area in the vertical direction and is provided with an annular heat exchanger, and the heat exchanger surrounds the stirring paddles. However, the working area of the patent is annular, the structure is complex, and high-temperature liquid and low-temperature liquid need to be injected from the outside, so that the working area is inconvenient to use.
Chinese patent CN 208852797U discloses a thermostatic bath capable of improving temperature uniformity, this patent includes thermostatic bath cell body and capping, the thermostatic bath cell body includes a cavity that is used for packing into liquid, the top of thermostatic bath cell body extends towards the center of cavity and forms suddenly along, suddenly along the cavity internal symmetry of below be provided with first guide plate and second guide plate, be equipped with the runner between two guide plates and the cavity inner wall respectively, the runner internal fixation has the stirring subassembly, the cell body bottom still is equipped with the heating pipe, utilize the heating pipe to heat inside liquid. Be provided with the baffle between this patent heating portion and the heat transfer medium, only provide the interchange passageway of cold and hot medium through the drainage hole, heating efficiency is low, is not convenient for carry out effective control to the temperature moreover.
Chinese patent CN 206372851U discloses a thermostatic bath rabbling mechanism, including thermostatic bath, motor and water conservancy diversion subassembly, the output shaft of motor vertically stretches into in the thermostatic bath and has the extension axle through the coupling joint, is fixed with the fan blade on the extension axle, has strengthened the stirring intensity to heat transfer medium, but all fan blades are the inclination 45 °, can only carry out axial propulsion, increase the velocity of flow to heat transfer medium, can not realize radial mixture to heat transfer medium well.
Therefore, a device capable of effectively improving the temperature uniformity and the fluctuation index of the thermostatic bath is urgently needed to provide a good constant-temperature working test environment and meet the increasing market demand for calibrating the high-precision thermometer.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the flow channel structure for improving the temperature field index of the thermostatic bath, which has the advantages of simple structure, reasonable design, effective improvement of temperature uniformity and fluctuation in the thermostatic bath and extremely high practical use value.
In order to achieve the purpose, the invention adopts the following technical scheme:
the runner structure for improving the temperature field index of the thermostatic bath comprises a bath cavity inner container, a stirring unit, a flow guide unit and a heater, wherein the bath cavity inner container is divided into a stirring cavity and a working cavity by a vertically arranged middle partition plate, a gap for a heat transfer medium to pass through is reserved between the upper end and the lower end of the middle partition plate and the upper end and the lower end of the bath cavity inner container, the main parts of the stirring unit and the heater are positioned in the stirring cavity, and the flow guide unit is arranged in the working cavity and is arranged on the middle partition plate;
the flow guide unit comprises a front flow guide cylinder and a spiral flow guide cover, wherein the front flow guide cylinder is of an integrated structure, the spiral flow guide cover is fixed at the lower end of the front flow guide cylinder, a spiral blade mechanism is installed in the spiral flow guide cover, when the spiral flow guide unit works, a part of heat transfer medium enters the front flow guide cylinder through the spiral blade mechanism and then spirally rises, and the other part of heat transfer medium enters an interlayer between the front flow guide cylinder and the wall of the working inner cavity through a flow guide hole at the top end of the outer part of the spiral flow guide cover.
The front guide cylinder comprises a cylinder body with an upper opening and a lower opening, a working test cavity is arranged in the cylinder body, horizontal connecting plates are fixed on the outer edges of the upper end and the lower end of the cylinder body, a plurality of through holes are formed in the horizontal connecting plates, the cylinder body is installed on the intermediate partition plate through the horizontal connecting plates and fasteners, guide plates with the direction and the angle consistent with those of the propeller blades are arranged on the inner side surface and the outer side surface of the cylinder body, the heat transfer medium is screwed upwards by the guide plates, and the uniformity of the heat transfer medium is effectively improved.
The spiral guide cover comprises a guide cylinder with an upper opening and a lower opening and the same inner diameter as the cylinder body, and a spiral blade mechanism fixedly installed in the guide cylinder, the tail end of a blade of the spiral blade mechanism is fixed on the inner wall of the guide cylinder, a guide plate matched with the horizontal connecting plate is fixed on the outer edge of the top of the guide cylinder, a plurality of guide holes corresponding to the through holes in the horizontal connecting plate are formed in the guide plate, and a plurality of fasteners penetrate through part of the guide holes and the corresponding through holes to connect and fix the guide plate and the horizontal connecting plate.
When the spiral blade mechanism is applied, the spiral blade mechanism is fixed relative to the guide cylinder, and a part of heat transfer medium enters the cylinder body through the spiral lifting of the spiral blade in the guide cylinder and spirally rises along the guide plate on the inner side surface of the cylinder body; the other part of the heat transfer medium enters an interlayer between the cylinder and the wall of the working inner cavity through the flow guide holes on the flow guide plate outside the flow guide cylinder and spirally rises along the guide plate outside the cylinder, so that the heat transfer medium in the interlayer is uniformly mixed and has consistent temperature, and the heat transfer medium in the cylinder can be better insulated.
The propeller blade mechanism comprises a screw shaft positioned in the center and at least two propeller blades which are uniformly distributed on the screw shaft, and the propeller blades are in spiral circular arc transition and incline upwards.
The lower end of the spiral shaft is conical, semi-spherical or polygonal, the side wall of the spiral shaft is provided with spiral upward guide grooves, and the number, angle and direction of the guide grooves are consistent with those of the spiral blades.
The spiral guide cover comprises a guide cylinder with an upper opening and a lower opening and the inner diameter of the guide cylinder is the same as that of the cylinder body, and a spiral blade mechanism fixedly installed in the guide cylinder, wherein the spiral blade mechanism comprises a spiral shaft and a spiral blade, the spiral shaft is fixed on the guide cylinder, and the spiral blade can rotate by taking the spiral shaft as the center.
The stirring unit comprises a stirring motor, a stirring paddle and a blade flow guide piece, the stirring motor is fixed on a plug-in disc seat at the top of the tank cavity liner, the stirring paddle is connected with an output shaft of the stirring motor through a coupler, the stirring paddle is vertically inserted into the stirring cavity and surrounded by a heater, a plurality of layers of blades are arranged on the stirring paddle, and the blade flow guide piece is fixed on the side face, facing the stirring cavity, of the middle partition plate.
The number of the blades of each layer is at least two, and the diameter of each blade is 0.5-0.8 time of that of the stirring cavity; the blade is divided into a first blade surrounded by the heater and a second blade located inside the blade guide member according to the position of the blade.
The first blades are provided with at least one layer, the first blades are hinge-type blades, the angle of each blade is 90 degrees, the blades of the first blades in different layers are arranged in a staggered manner, and the distance between the first blades in different layers is positive integral multiple of the diameter of each blade; the first paddle can realize the function of radially mixing the heat transfer medium, accelerate the heat exchange rate of the heat transfer medium and the heater, uniformly mix the heat transfer medium, improve the heat transfer efficiency and ensure the uniform temperature of the heat transfer medium.
The second paddle is provided with at least one layer, the second paddle is a propelling paddle, the angle of the paddle is 25-30 degrees, the blades of the second paddles on different layers are arranged in a staggered mode, and the distance between the second paddles on different layers is 0.5-0.8 time of the diameter of the paddle; the second paddle can realize the function of axially propelling the heat transfer medium, the flow velocity of the heat transfer medium is effectively increased by matching with the paddle flow guide pieces arranged around the second paddle, and the liquid flows among the second paddles are overlapped to enhance the propelling effect.
The paddle guide piece is the same as the stirring cavity in shape and plugs the lower part of the stirring cavity integrally, a fluid channel which is matched with the second paddle in size and completely surrounds the second paddle is arranged in the middle of the paddle guide piece, the fluid channel is vertically arranged, the upper end and the lower end of the fluid channel are funnel-shaped, and the drift diameter of the fluid channel from the outside to the inside is reduced in a smooth transition mode.
And a refrigerator is also fixed in the stirring cavity, so that the device is conveniently applied to a low-temperature scene.
When the stirring device is used, the stirring motor and the heater are turned on, so that the heat transfer medium is driven by the stirring paddle to enter the working cavity from the bottom of the stirring cavity, spirally rises at the working cavity under the action of the front guide cylinder and the spiral guide cover, is secondarily mixed and then enters the stirring cavity from the top of the working cavity, and the temperature stability of the heat transfer medium is effectively improved.
The invention has the beneficial effects that:
1. the spiral flow guide cover can enable the heat transfer medium entering the working test area to spirally rise for secondary mixing, so that the uniformity and the volatility of a temperature field of the working test area are effectively improved;
2. the first and second blades are matched for stirring, so that the stirring heat exchange efficiency is greatly improved;
3. the paddle flow guide piece is matched with the second paddle, so that the propelling effect of the heat transfer medium in the circulating flow channel is greatly improved;
4. the guide plate fixed in the front guide cylinder further ensures that the heat transfer medium in the working test area is in a spiral flow direction, and the temperature uniformity and the volatility of the thermostatic bath are further improved. The guide plate fixed outside the front guide cylinder enables heat transfer media in the interlayer to be uniformly mixed and have consistent temperature, and the heat transfer media in the cylinder can be better insulated.
Drawings
FIG. 1 is a schematic structural view of the present flow channel structure;
FIG. 2 is a schematic structural view of a stirring paddle;
FIG. 3 is a top view of the paddle;
FIG. 4 is a schematic view of a blade inducer in cooperation with a second blade;
FIG. 5 is an axial view of the spiral pod;
FIG. 6 is a view of the third paddle in cooperation with the screw shaft;
FIG. 7 is a schematic structural view of a front guide shell;
FIG. 8 is a schematic view of the spiral dome in cooperation with the front guide shell;
FIG. 9 is a schematic flow diagram of the heat transfer medium inside the present flow channel structure;
FIG. 10 is a top view of the present device;
FIG. 11 is a schematic view of a thermostatic bath test point;
FIG. 12 is a graph comparing the measured volatility of an oil bath at 300 ℃;
wherein, 1, a stirring motor; 2. a groove cavity inner container; 3. a heater; 4. a stirring paddle; 5. a blade inducer; 6. a spiral air guide sleeve; 7. a front guide cylinder; 8. a first blade; 9. a second blade; 10. a screw shaft; 11. a baffle; 12. a propeller blade; 13. a draft tube; 14. a diversion trench; 15. a flow guide hole; 16. a horizontal connecting plate; 17. a barrel; 18. a guide plate.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
The structures, proportions, sizes, and other dimensions shown in the drawings and described in the specification are for understanding and reading the present disclosure, and are not intended to limit the scope of the present disclosure, which is defined in the claims, and are not essential to the art, and any structural modifications, changes in proportions, or adjustments in size, which do not affect the efficacy or achievement of the intended purposes of the present disclosure, are intended to be included within the scope of the present disclosure. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
Example 1:
as shown in fig. 1-8 and 10, the flow channel structure for improving the temperature field index of the thermostatic bath comprises a tank cavity liner 2, a stirring unit, a flow guide unit and a heater 3, wherein the tank cavity liner 2 is divided into a stirring cavity and a working cavity by a vertically arranged middle partition plate, a gap for a heat transfer medium to pass through is reserved between the upper end and the lower end of the middle partition plate and the upper end and the lower end of the tank cavity liner 2, main parts of the stirring unit and the heater 3 are positioned in the stirring cavity, and the flow guide unit is arranged in the working cavity and is arranged on the middle partition plate; the flow guide unit comprises a front flow guide cylinder 7 and a spiral flow guide cover 6, wherein the front flow guide cylinder 7 is integrally arranged up and down, the spiral flow guide cover 6 is fixed at the lower end of the front flow guide cylinder, a spiral blade mechanism is arranged in the spiral flow guide cover 6, when the spiral flow guide unit works, a part of heat transfer medium passes through the spiral blade mechanism and then spirally rises to enter the front flow guide cylinder 7, and the other part of heat transfer medium enters an interlayer between the front flow guide cylinder 7 and the wall of a working inner cavity through a flow guide hole at the top end outside the spiral flow guide cover 6.
The stirring unit comprises a stirring motor 1, a stirring paddle 4 and a blade flow guide piece 5, the stirring motor 1 is fixed on a plug-in disc seat at the top of the tank cavity inner container 2, the stirring paddle 4 is connected with an output shaft of the stirring motor 1 through a coupler, the stirring paddle 4 is vertically inserted into the stirring cavity and is surrounded by a heater 3, a plurality of layers of blades are arranged on the stirring paddle 4, and the blade flow guide piece 5 is fixed on the side face of the middle partition plate facing the stirring cavity. The number of the blades of each layer is at least two, and the diameter of each blade is 0.5-0.8 times of that of the stirring cavity; the blade is divided into a first blade 8 surrounded by the heater 3 and a second blade 9 located inside the blade guide 5 according to the position of the blade.
The first blades 8 are provided with at least one layer, the first blades are of a hinge type, the angle of the blades is 80-90 degrees, preferably 90 degrees, the blades of the first blades 8 in different layers are arranged in a staggered mode, and the distance between the first blades 8 in different layers is positive integral multiple of the diameter of the blades; the first blades 8 can realize the function of radially mixing the heat transfer medium, accelerate the heat exchange rate of the heat transfer medium and the heater 3, uniformly mix the heat transfer medium, improve the heat transfer efficiency and ensure the uniform temperature of the heat transfer medium; the second blades 9 are provided with at least one layer, the second blades 9 are propulsion blades, the angle of the blades is 25-30 degrees, the blades of the second blades 9 on different layers are arranged in a mutually staggered mode, and the distance between the second blades 9 on different layers is 0.5-0.8 time of the diameter of each blade; the second blades 9 can realize the function of pushing the heat transfer medium in the axial direction, the flow velocity of the heat transfer medium is effectively increased by matching with the blade flow guide pieces 5 arranged around the second blades 9, and the pushing effect is enhanced by liquid flow superposition among the second blades 9 in multiple layers.
The paddle flow guide piece 5 is the same as the stirring cavity in shape and integrally plugs the lower part of the stirring cavity, a fluid channel which is matched with the second paddle 9 in size and completely surrounds the second paddle 9 is arranged in the middle of the paddle flow guide piece 5, the fluid channel is vertically arranged, the upper end and the lower end of the fluid channel are funnel-shaped, and the drift diameter of the fluid channel from the outside to the inside is reduced in a smooth transition mode, the paddle flow guide piece 5 can effectively ensure that a heat transfer medium intensively and regularly passes through the second paddle 9, and the paddle flow guide piece is matched with the second paddle 9 to generate large thrust to the heat transfer medium, so that the propelling efficiency of the second paddle 9 is improved.
The front guide cylinder 7 comprises a cylinder body 17 with an upper opening and a lower opening, a working test cavity is arranged inside the cylinder body 17, horizontal connecting plates 16 are fixed on the outer edges of the upper end and the lower end of the cylinder body 17, a plurality of through holes are formed in the horizontal connecting plates 16, the cylinder body 17 is installed on a middle partition plate through the horizontal connecting plates 16 and fasteners, guide plates 18 with the direction and the angle consistent with those of the propeller blades 12 are arranged on the inner side surface and the outer side surface of the cylinder body 17, the heat transfer medium is screwed upwards by the guide plates 18, and the uniformity of the heat transfer medium is effectively improved. The spiral guide cover 6 comprises a guide cylinder 13 with an upper opening and a lower opening and the same inner diameter as the cylinder body 17, and a spiral blade mechanism fixedly installed in the guide cylinder 13, the tail end of a blade of the spiral blade mechanism is fixed on the inner wall of the guide cylinder 13, a guide plate 11 matched with a horizontal connecting plate 16 is fixed at the outer edge of the top of the guide cylinder 13, a plurality of guide holes 15 corresponding to through holes in the horizontal connecting plate 16 are formed in the guide plate 11, and a plurality of fasteners penetrate through part of the guide holes 15 and the corresponding through holes to connect and fix the guide plate 11 and the horizontal connecting plate 16. The propeller blade mechanism comprises a central screw shaft 10 and at least two propeller blades 12 uniformly distributed on the screw shaft 10, the propeller blades 12 are in spiral arc transition and incline upwards, and the pitch of the spiral line is 100 mm; the lower end of the screw shaft 10 is conical, semi-spherical, polygonal or other shapes determined according to actual needs, the side wall of the screw shaft 10 is provided with guide grooves 14 which are upward spirally, and the number, the angle and the direction of the guide grooves 14 are consistent with those of the screw blades 12.
When the device is used specifically, the whole device is installed according to a drawing 1, the stirring motor 1 and the heater 3 are turned on, so that the heat transfer medium is driven by the first paddle and the second paddle to flow inside the tank cavity inner container 2, the flow direction of the heat transfer medium in the tank cavity inner container 2 is as shown in a drawing 9, the heat transfer medium spirally rises at a working cavity, the heat transfer medium is mixed uniformly for the second time, and the temperature uniformity of the heat transfer medium is effectively improved. The multiple layers of blades in the stirring cavity respectively play their roles, so that the heat transfer medium is mixed in the stirring cavity to the maximum extent, the heat exchange rate is increased, and the stirring cavity is powerful. The good propulsion effect of the second paddle is matched with the spiral air guide sleeve, so that the heat transfer medium spirally rises after reaching the working test cavity. The guide plate 11 arranged on the inner side of the front guide cylinder 7 continues the spiral rising trend of the heat transfer medium in the internal test area, ensures the uniform mixing of the medium, ensures the temperature uniformity to the maximum extent and finally provides a constant temperature environment meeting the requirements.
Taking the practical data of the oil groove at the high temperature of 300 ℃ as an example, the temperature difference between the inside and the outside of the thermostatic bath in the temperature range is larger, so that the advantages and the disadvantages of the circulating flow passage structure are more easily embodied. The test is carried out according to the requirements of JJF1030-2010 constant temperature bath technical performance test specification. Table one is measured data comparison:
data index comparison of Meter-oil groove (300 deg.C)
The specific steps and calculation are as follows:
as shown in fig. 11, the depth of the second-class standard platinum resistance thermometer inserted into the working test area 1/2 is used as a constant temperature bath test fixed reference point O, the second-class standard platinum resistance thermometer is used, and eight points of a typical position A, B, C, D, E, F, G, H uniformly distributed on the upper horizontal plane and the lower horizontal plane of the constant temperature bath working test area are selected as constant temperature bath test moving reference points.
And (3) testing temperature fluctuation: after the temperature field of the thermostatic bath equipment at 300 ℃ is stabilized, reading the readings of a second-class standard platinum resistance thermometer at a fixed point O, and reading the readings at uniform intervals of 6 times per minute for 30 min. And taking the temperature difference between the maximum value and the minimum value, namely the fluctuation of the constant temperature tank at the temperature point of 300 ℃. A specific example is shown in fig. 12.
And (3) testing the temperature uniformity: and after the temperature field of the thermostatic bath equipment at 300 ℃ is stable, the temperature uniformity test can be carried out after the temperature fluctuation test is finished. Each moving point was stabilized for 10min to start reading, and A, B, C, D, E, F, G, H moving reference points were read sequentially in sequence. Take point A as an example, press the fixed point O → moveThe measurement sequence of the point A → the moving point A → the fixed point O → the moving point A → the fixed point O sequentially obtains the indication value
Calculating the average value of the indication values of the fixed thermometers:
calculating the average value of the indication values of the mobile thermometers:
the indication difference of point a with respect to point O is:
by analogy, the indication value difference R of each moving point relative to the fixed point can be obtained according to the method B-O 、R C-O 、R D-O 、R E-O 、R F-O 、R G-O 、R H-O . In the 8 sets of the indicated value differences, the difference between the maximum value and the minimum value is converted into the temperature, and the temperature is the maximum temperature difference of the working area.
Table two and table three are the original test data table records:
TABLE II 300 ℃ oil groove data (unadjusted)
Oil groove data of 300 ℃ C. table III (after optimization)
Example 2:
in this embodiment, the spiral guide cover 6 includes a guide cylinder with an upper opening and a lower opening and the same inner diameter as the cylinder, and a propeller blade mechanism fixedly installed in the guide cylinder, the propeller blade mechanism includes a spiral shaft and a propeller blade, the spiral shaft is fixed on the guide cylinder, and the propeller blade can rotate around the spiral shaft. The propeller blades may be planar blades or curved blades that scan along a helical path. Other technical points and embodiments are the same as those of example 1.
Example 3:
in this embodiment, the spiral guide cover 6 includes a guide shell having an upper opening and a lower opening and having the same inner diameter as the cylinder, and propeller blades fixedly installed in the guide shell, each propeller blade is uniformly and independently fixed on the inner wall of the guide shell, and there is no connection between the propeller blades. Other technical points and embodiments are the same as those of example 1.
Example 4:
in this embodiment, the spiral air guide sleeve 6 includes an air guide cylinder with an upper opening and a lower opening and the same inner diameter as the cylinder body, and at least two fixed blades are fixedly installed in the air guide cylinder, the fixed blades are inclined upwards at a fixed angle, and each fixed blade is uniformly fixed on the inner wall of the air guide cylinder and connected into a whole at the central position. Other technical details are the same as those of embodiment 1.
Example 5:
in this embodiment, a refrigerator is further fixed in the stirring cavity, and the refrigerator may be helical with the heater 3, located inside or outside the heater 3, or may be a plate-type refrigerator or other shapes. Other technical points in this embodiment are the same as those in embodiment 1.
When the constant temperature tank is in a low-temperature state, the refrigerator is started to cool the heat transfer medium, so that the application field of the invention is effectively widened.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (6)
1. A runner structure for improving the temperature field index of a thermostatic bath is characterized by comprising a bath cavity liner, a stirring unit, a flow guide unit and a heater, wherein the bath cavity liner is internally divided into a stirring cavity and a working cavity by a vertically arranged middle partition plate, gaps for heat transfer media to pass through are reserved between the upper end and the lower end of the middle partition plate and the upper end and the lower end of the bath cavity liner, the stirring unit and the heater are mainly positioned in the stirring cavity, and the flow guide unit is arranged in the working cavity and is arranged on the middle partition plate;
the flow guide unit comprises a preposed flow guide cylinder and a spiral flow guide cover, wherein the preposed flow guide cylinder is integrally arranged up and down, the spiral flow guide cover is fixed at the lower end of the preposed flow guide cylinder, and a spiral blade mechanism is arranged in the spiral flow guide cover;
the preposed guide cylinder comprises a cylinder body with an upper opening and a lower opening, a working test cavity is arranged in the cylinder body, horizontal connecting plates are fixed on the outer edges of the upper end and the lower end of the cylinder body respectively, a plurality of through holes are formed in the horizontal connecting plates, the cylinder body is arranged on the middle partition plate through the horizontal connecting plates and fasteners, and guide plates with the direction and the angle consistent with those of the propeller blades are arranged on the inner side surface and the outer side surface of the cylinder body respectively;
the spiral guide cover comprises a guide cylinder with an upper opening and a lower opening and the inner diameter of the guide cylinder is the same as that of the cylinder body, and a spiral blade mechanism fixedly arranged in the guide cylinder, the tail ends of blades of the spiral blade mechanism are fixed on the inner wall of the guide cylinder, a guide plate matched with the horizontal connecting plate is fixed on the outer edge of the top of the guide cylinder, a plurality of guide holes corresponding to the through holes in the horizontal connecting plate are formed in the guide plate, and a plurality of fasteners penetrate through part of the guide holes and the corresponding through holes to connect and fix the guide plate and the horizontal connecting plate; the spiral blade mechanism comprises a spiral shaft positioned in the center and at least two spiral blades uniformly distributed on the spiral shaft, and the spiral blades are in spiral arc transition and incline upwards; the lower end of the spiral shaft is conical, semi-spherical or polygonal, the side wall of the spiral shaft is provided with spiral upward guide grooves, and the number, angle and direction of the guide grooves are consistent with those of the spiral blades.
2. The flow channel structure for improving the temperature field index of the thermostatic bath according to claim 1, wherein the stirring unit comprises a stirring motor, a stirring paddle and a blade flow guide piece, the stirring motor is fixed on a plug-in tray seat at the top of the tank cavity liner, the stirring paddle is connected with an output shaft of the stirring motor through a coupler, the stirring paddle is vertically inserted into the stirring cavity and surrounded by the heater, the stirring paddle is provided with a plurality of layers of blades, and the blade flow guide piece is fixed on the side surface of the middle partition plate facing the stirring cavity.
3. The flow channel structure for improving the temperature field index of the thermostatic bath according to claim 2, wherein the number of the blades in each layer is at least two, and the diameter of each blade is 0.5 to 0.8 times of that of the stirring cavity; the blade is divided into a first blade surrounded by the heater and a second blade located inside the blade guide member according to the position of the blade.
4. A flow channel structure for improving the temperature field index of a thermostatic bath according to claim 3, wherein the first paddle is provided with at least one layer, the first paddle is a flap-type paddle, the angle of the paddle is 80-90 degrees, the blades of the first paddles in different layers are arranged in a staggered manner, and the distance between the first paddles in different layers is a positive integral multiple of the diameter of the paddle; the second paddle is provided with at least one layer, the second paddle is a propelling paddle, the angle of the paddle is 25-30 degrees, the blades of the second paddles on different layers are arranged in a staggered mode, and the distance between the second paddles on different layers is 0.5-0.8 times of the diameter of the paddle.
5. The flow channel structure for improving the temperature field index of the thermostatic bath according to claim 2, wherein the paddle flow guide piece has the same shape as the stirring cavity and integrally plugs the lower part of the stirring cavity, a fluid channel matched with the second paddle in size and completely surrounding the second paddle is formed in the middle of the paddle flow guide piece, the fluid channel is vertically arranged, and the upper end and the lower end of the fluid channel are funnel-shaped and the diameter of the fluid channel is reduced through smooth transition from the outside to the inside.
6. The flow passage structure for improving the temperature field index of the constant temperature bath as claimed in claim 1, wherein a refrigerator is further fixed in the stirring chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110281153.8A CN113042123B (en) | 2021-03-16 | 2021-03-16 | Flow passage structure for improving temperature field index of thermostatic bath |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110281153.8A CN113042123B (en) | 2021-03-16 | 2021-03-16 | Flow passage structure for improving temperature field index of thermostatic bath |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113042123A CN113042123A (en) | 2021-06-29 |
| CN113042123B true CN113042123B (en) | 2022-09-20 |
Family
ID=76512742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110281153.8A Active CN113042123B (en) | 2021-03-16 | 2021-03-16 | Flow passage structure for improving temperature field index of thermostatic bath |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113042123B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3822776A1 (en) * | 1988-07-06 | 1990-01-11 | Peter Huber | Device for damping temperature fluctuations in thermostats |
| CN2621801Y (en) * | 2002-11-11 | 2004-06-30 | 虞培清 | Bottom diversion, high efficiency and energy saving agitating device |
| CN101116835A (en) * | 2006-07-31 | 2008-02-06 | 陈坚 | Constant temperature oven |
| CN205517843U (en) * | 2016-01-21 | 2016-08-31 | 中国计量学院 | Thermotank with compound heat transfer bottom plate |
| CN206064243U (en) * | 2016-08-19 | 2017-04-05 | 湖北雪飞化工有限公司 | Water conservancy diversion confuses groove |
| CN209127355U (en) * | 2018-10-25 | 2019-07-19 | 安徽济生元药业有限公司 | A kind of heat preservation glue bucket |
| CN211837922U (en) * | 2020-03-06 | 2020-11-03 | 枣庄市金科化工有限公司 | Modified starch's reation kettle device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH033436U (en) * | 1989-05-30 | 1991-01-14 | ||
| CN207342615U (en) * | 2017-09-12 | 2018-05-11 | 湖州光博生物科技有限公司 | A kind of agitating device for Cosmetic Manufacture |
-
2021
- 2021-03-16 CN CN202110281153.8A patent/CN113042123B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3822776A1 (en) * | 1988-07-06 | 1990-01-11 | Peter Huber | Device for damping temperature fluctuations in thermostats |
| CN2621801Y (en) * | 2002-11-11 | 2004-06-30 | 虞培清 | Bottom diversion, high efficiency and energy saving agitating device |
| CN101116835A (en) * | 2006-07-31 | 2008-02-06 | 陈坚 | Constant temperature oven |
| CN205517843U (en) * | 2016-01-21 | 2016-08-31 | 中国计量学院 | Thermotank with compound heat transfer bottom plate |
| CN206064243U (en) * | 2016-08-19 | 2017-04-05 | 湖北雪飞化工有限公司 | Water conservancy diversion confuses groove |
| CN209127355U (en) * | 2018-10-25 | 2019-07-19 | 安徽济生元药业有限公司 | A kind of heat preservation glue bucket |
| CN211837922U (en) * | 2020-03-06 | 2020-11-03 | 枣庄市金科化工有限公司 | Modified starch's reation kettle device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113042123A (en) | 2021-06-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Rathod et al. | Experimental investigations on latent heat storage unit using paraffin wax as phase change material | |
| CN104226207B (en) | Double-sided cooled concentric locking collar tubular sulfonator | |
| CN207649417U (en) | A kind of novel heat exchange water tank | |
| CN102059163B (en) | Liquid thermostat tank without stirrer | |
| CN113042123B (en) | Flow passage structure for improving temperature field index of thermostatic bath | |
| CN106840464A (en) | A kind of water-cooled Gordon calorimeter | |
| Rao et al. | Experimental study of heat transfer and pressure loss in channels with miniature V rib-dimple hybrid structure | |
| CN105327628A (en) | Low-flow-resistance swirling diffusion gas-liquid mixer | |
| CN206325570U (en) | A kind of reactor of homogeneous heating | |
| Japikse et al. | Single-phase transport processes in the closed thermosyphon | |
| CN2560428Y (en) | Low-temperature liquid thermostat | |
| CN106050746B (en) | A kind of high-temperature pump radiator | |
| JP2016537598A (en) | Geothermal probe with mixing element | |
| CN112050470B (en) | Heating power pond subassembly and contain its water heater | |
| CN116123815A (en) | Cooling device | |
| CN205607904U (en) | High accuracy's fuel gas heat value measurement system's combustion testing device | |
| CN214553676U (en) | Spiral flow guiding device of thermostatic bath | |
| CN211177449U (en) | Burner assembly, heat exchanger assembly and hot water equipment | |
| CN208606394U (en) | Interlayer oil tank high-frequency induction heating apparatus | |
| CN204107483U (en) | Double-sided cooled concentric locking collar tubular sulfonator | |
| CN209952834U (en) | Reaction kettle | |
| CN208817453U (en) | Electrode boiler water admixing device | |
| CN100436959C (en) | Environmental-protection instant-heating water-storage electric water-heater | |
| CN221242579U (en) | Double-air-duct cooling milk regulator | |
| CN211514410U (en) | Mixer with cooling function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |