CN216744893U

CN216744893U - Constant temperature water tank does not have apron heat preservation device

Info

Publication number: CN216744893U
Application number: CN202122899503.5U
Authority: CN
Inventors: 孙建军; 李海文; 邢宾
Original assignee: Baoding Taiwei Electromechanical Technology Co ltd
Current assignee: Baoding Taiwei Electromechanical Technology Co ltd
Priority date: 2021-11-24
Filing date: 2021-11-24
Publication date: 2022-06-14
Anticipated expiration: 2031-11-24

Abstract

The utility model provides a cover plate-free heat preservation device of a constant-temperature water tank, which comprises a constant-temperature water tank body, wherein a heat preservation cavity is arranged at the upper part of the inner side of the constant-temperature water tank body, a heating cavity is arranged at the lower part of the inner side of the constant-temperature water tank body, a first circulation mechanism is arranged at the bottom of the heat preservation cavity, a second circulation mechanism is arranged in the heating cavity, a heater is arranged at the center of the second circulation mechanism, the heat preservation cavity is communicated with the heating cavity through a third water through hole and a plurality of first water through holes, the third water through hole is positioned below the first circulation mechanism, the plurality of first water through holes are positioned at the bottom edge of the heat preservation cavity, the bottom of the heating cavity is communicated with a water inlet, temperature sensors are respectively connected above and below the inner side wall of the constant-temperature water tank body, the temperature sensors and the heater are electrically connected with a PLC controller, and the PLC controller is electrically connected with the first circulation mechanism. The utility model can keep the water temperature uniform, quickly carry out hot water circulation and realize the effect of high-efficiency temperature rise.

Description

Constant temperature water tank does not have apron heat preservation device

Technical Field

The utility model belongs to the technical field of heat preservation devices, and particularly relates to a cover plate-free heat preservation device of a constant-temperature water tank.

Background

The constant-temperature water tank has a wide application range, is suitable for being used for the precise constant-temperature direct heating or auxiliary heating in the science of biology, chemistry, physics, plants, chemical engineering and the like, and finally achieves the constant-temperature effect. A constant temperature water tank for battery high temperature water bath is experimental, the battery is when carrying out high temperature water bath experiment, water in the constant temperature water tank often needs the moisturizing because reasons such as evaporation, thereby it is inhomogeneous to cause temperature in the constant temperature water tank, probably cause the temperature out of control, make the experimental battery tympanites among them warp, cause experimental failure, often waste a large amount of manpower and materials, water temperature is inhomogeneous in the constant temperature water tank, mainly embody near the temperature of heating pipe height, the local temperature of keeping away from the heating pipe is low, the temperature is inhomogeneous, the circulation effect is poor. Therefore, there is a need for a cover-less thermal insulation device for a constant temperature water tank to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a cover-plate-free heat preservation device of a constant-temperature water tank, which aims to solve the problems.

In order to achieve the purpose, the utility model provides the following scheme: a cover plate-free heat preservation device of a constant temperature water tank comprises a constant temperature water tank body, wherein a heat preservation cavity is arranged at the upper part of the inner side of the constant temperature water tank body, a heating cavity is arranged at the lower part of the inner side of the constant-temperature water tank body, a first circulating mechanism is arranged at the bottom of the heat preservation cavity, a second circulating mechanism is arranged in the heating cavity, a heater is arranged in the center of the second circulating mechanism, the heat preservation cavity is communicated with the heating cavity through a third water through hole and a plurality of first water through holes, the third water through hole is positioned below the first circulating mechanism, the plurality of first water through holes are positioned at the bottom edge of the heat preservation cavity, the bottom of the heating cavity is communicated with a water inlet, the upper part and the lower part of the inner side wall of the constant-temperature water tank body are respectively connected with a temperature sensor, the temperature sensor and the heater are electrically connected with a PLC (programmable logic controller), and the PLC is electrically connected with the first circulating mechanism;

the second circulation mechanism is including being located the flight in the heating chamber, flight bottom fixed connection be in the inboard bottom of constant temperature water tank body, the flight inboard is provided with a plurality of rotatory promotion oars, the heater is located the inboard center of flight and connection are in the inboard bottom of constant temperature water tank body, rotatory promotion oar with PLC controller electric connection.

Preferably, the spiral plate outside-in spirals in proper order and extends, form helical coiled passage between the spiral plate, keep away from the heater the helical coiled passage in-connection has a plurality of rotatory promotion oar, the spiral plate be close to the one end at center with be provided with the clearance between the heater, helical coiled passage's center with the third through mouth of a river corresponds the setting, helical coiled passage's top with the heating chamber intercommunication, the bottom side limit portion of spiral plate is in through a plurality of fixed block fixed connection the inboard bottom of constant temperature water tank body, the bottom side center of spiral plate with the inboard bottom fixed connection of constant temperature water tank body.

Preferably, the centers of the side walls of the spiral plates are sequentially recessed outwards.

Preferably, the heat preservation chamber with be provided with the baffle between the heating chamber, baffle fixed connection be in on the inside wall of constant temperature basin body, the third water gap is seted up the central point of baffle puts, and is a plurality of first water gap is located the limit portion of baffle.

Preferably, the first circulation mechanism comprises a plurality of guide plates which are circumferentially arranged at equal intervals on the edge of the partition plate, any one of the first water through holes is located between the adjacent guide plates, the center positions of the plurality of guide plates are connected with a driving unit for pushing water, a second water through hole is arranged at the bottom of the inner side of the third water through hole, and the inner diameter of the second water through hole is smaller than that of the third water through hole.

Preferably, the driving unit comprises a hot water channel fixedly connected to the upper portion of the partition plate, a spiral convex plate is fixedly connected to the inner side wall of the hot water channel, a motor is fixedly connected to the inner side of the hot water channel through a plurality of fixing rods, a telescopic impeller is connected to the lower portion of the motor in a transmission mode, the telescopic impeller corresponds to a third water through opening, the third water through opening is located at the bottom of the inner side of the hot water channel, and the motor is electrically connected with the PLC.

Preferably, the telescopic impeller comprises a first rotating shaft located below the motor, the first rotating shaft is in shaft connection with a transmission shaft of the motor, a telescopic shell is fixedly connected to the outer side of the lower end of the first rotating shaft, a second rotating shaft is vertically and slidably connected to the lower portion of the first rotating shaft and penetrates through the bottom of the telescopic shell, an impeller is fixedly connected to the bottom end of the second rotating shaft, the impeller is located in the third water port, and a spring is arranged between the second rotating shaft and the top of the inner side of the telescopic shell.

Preferably, the top of second rotation axis with the bottom inner chamber sliding connection of first rotation axis, the lateral wall of second rotation axis with flexible casing diapire sliding connection, a plurality of slides have vertically been seted up in the flexible casing, be located in the flexible casing second rotation axis lateral wall circumference equidistant connection has a plurality of sliders, the slider with slide looks adaptation, the top of slider is connected the bottom of spring, the top of spring is connected the inboard top of flexible casing, the spring housing is established the top of second rotation axis.

Preferably, rotatory promotion oar includes driving motor, driving motor's transmission shaft coupling has the blade, driving motor with PLC controller electric connection.

The utility model has the following technical effects: under the action of the first circulating mechanism and the second circulating mechanism, water in the constant-temperature water tank body forms a circulating state; the low-temperature water in the heat preservation cavity flows into the heating cavity through the first water through ports, the low-temperature water flows to the center direction along the spiral plate under the pushing action of the rotary pushing paddle and reaches the heater, the proper-temperature water passes through the third water through port after the low-temperature water is heated, and the proper-temperature water enters the heat preservation cavity under the action of the first circulating mechanism; the low-temperature water and the suitable-temperature water are sequentially circulated, so that the water temperature of the constant-temperature water tank body can be quickly stabilized; after the temperature sensor senses the change of the water temperature, the water temperature signal is transmitted to the PLC controller, the PLC controller converts the water temperature signal into a starting signal and transmits the starting signal to the heater, the first circulating mechanism and the rotary pushing paddle, and the adjustment of the water temperature is completed; the spiral plate is used for enabling low-temperature water to sequentially approach the heater, and the low-temperature water is rapidly heated to reach the specified temperature by utilizing the radiant heat of the heater.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic sectional view showing the internal structure of an incubator;

FIG. 2 is a schematic top view of a spiral plate;

FIG. 3 is an enlarged view of a portion of FIG. 1;

wherein, 1, a constant temperature water tank body; 2. a heat preservation cavity; 3. a baffle; 4. a partition plate; 5. a first water passage port; 6. a heating cavity; 7. a spiral plate; 8. a fixed block; 9. rotating the pushing paddle; 10. a heater; 11. a second water vent; 12. a third water through hole; 13. a water inlet; 14. an impeller; 15. a motor; 16. fixing the rod; 17. a hot water passage; 18. a spiral convex plate; 19. a first rotating shaft; 20. a telescopic housing; 21. a slideway; 22. a spring; 23. a slider; 24. a second rotation axis.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

Referring to fig. 1-3, the utility model provides a cover plate-free heat preservation device of a constant temperature sink, which comprises a constant temperature sink body 1, wherein a heat preservation cavity 2 is arranged at the upper part of the inner side of the constant temperature sink body 1, a heating cavity 6 is arranged at the lower part of the inner side of the constant temperature sink body 1, a first circulation mechanism is arranged at the bottom of the heat preservation cavity 2, a second circulation mechanism is arranged in the heating cavity 6, a heater 10 is arranged at the center of the second circulation mechanism, the heat preservation cavity 2 is communicated with the heating cavity 6 through a third water through hole 12 and a plurality of first water through holes 5, the third water through hole 12 is arranged below the first circulation mechanism, the plurality of first water through holes 5 are arranged at the bottom edge of the heat preservation cavity 2, a water inlet 13 is communicated with the bottom of the heating cavity 6, temperature sensors (not shown in the figures) are respectively connected above and below the inner side wall of the constant temperature sink body 1, and the temperature sensors and the heater 10 are electrically connected with a PLC controller (not shown in the figures), the PLC controller is electrically connected with the first circulating mechanism;

the second circulation mechanism comprises a spiral plate 7 located in the heating cavity 6, the bottom of the spiral plate 7 is fixedly connected to the bottom of the inner side of the constant-temperature water tank body 1, a plurality of rotary pushing paddles 9 are arranged on the inner side of the spiral plate 7, the heater 10 is located at the center of the inner side of the spiral plate 7 and connected to the bottom of the inner side of the constant-temperature water tank body 1, and the rotary pushing paddles 9 are electrically connected with the PLC.

Under the action of the first circulating mechanism and the second circulating mechanism, water in the constant-temperature water tank body 1 forms a circulating state; the low-temperature water in the heat preservation cavity 2 flows into the heating cavity 6 through the first water through ports 5, the low-temperature water flows to the center direction along the spiral plate 7 under the pushing action of the rotary pushing paddle 9 until reaching the heater 10, the proper-temperature water passes through the third water through port 12 after the low-temperature water is heated, and the proper-temperature water enters the heat preservation cavity 2 under the action of the first circulating mechanism; the low-temperature water and the moderate-temperature water are circulated in sequence, and the water temperature of the constant-temperature water tank body 1 is quickly stabilized; after the temperature sensor senses the change of the water temperature, the water temperature signal is transmitted to the PLC controller, the PLC controller converts the water temperature signal into a starting signal and transmits the starting signal to the heater 10, the first circulating mechanism and the rotary pushing paddle 9, and the adjustment of the water temperature is completed; the spiral plate 7 is used for bringing low-temperature water to the heater 10 in sequence, and rapidly heating the low-temperature water to a specified temperature by using the radiant heat of the heater 10.

Further optimize the scheme, spiral plate 7 outside-in is the spiral in proper order and is extended, form helical coiled passage between the spiral plate 7, the helical coiled passage in-connection who keeps away from heater 10 has a plurality of rotatory promotion oar 9, be provided with the clearance between one end that spiral plate 7 is close to the center and the heater 10, helical coiled passage's center and third through mouth of a river 12 correspond the setting, helical coiled passage's top and heating chamber 6 intercommunication, the bottom side limit portion of spiral plate 7 passes through the inboard bottom of a plurality of fixed blocks 8 fixed connection at constant temperature basin body 1, the bottom side center of spiral plate 7 and the inboard bottom fixed connection of constant temperature basin body 1.

After low-temperature water enters the heating cavity 6 from the first water through opening 5, the low-temperature water flows along the spiral channel under the pushing of the rotary pushing paddle 9, on one hand, more low-temperature water can be enabled to be quickly close to the heater 10, on the other hand, the low-temperature water can be heated in advance in the spiral moving process by utilizing the radiation temperature of the heater 10, and on the other hand, the heated water can form an upward flowing trend around the heater 10 under the pushing of the low-temperature water; after the water is close to the heater 10, the water temperature is raised, and the raised water temperature enters the heat preservation cavity 2 through the third water through hole 12.

In a further optimized scheme, the centers of the side walls of the spiral plates 7 are sequentially sunken outwards. The low-temperature water moves spirally in the spiral plate 7 under the pushing action of the rotary pushing paddle 9, centrifugal force is formed in the moving process, the middle part of the spiral plate 7 is sunken outwards, and the situation that the low-temperature water is separated from the spiral channel, moves to the upper part of the spiral plate 7 and cannot move smoothly to the periphery of the heater 10 can be effectively avoided; after the hot water in the center of the spiral plate 7 is separated from the side wall of the spiral plate 7, the hot water continuously moves spirally due to inertia, and the hot water is continuously pushed into the third water passing opening 12.

Further optimization scheme is provided with baffle 4 between heat preservation chamber 2 and the heating chamber 6, and baffle 4 fixed connection is on the inside wall of constant temperature water tank body 1, and the central point at baffle 4 is seted up to third through-flow gate 12 puts, and a plurality of first through-flow gate 5 are located the limit portion of baffle 4.

According to the further optimization scheme, the first circulating mechanism comprises a plurality of guide plates 3 which are circumferentially arranged at the edges of the partition plates 4 at equal intervals, any one first water through opening 5 is located between the adjacent guide plates 3, the center positions of the guide plates 3 are connected with a driving unit for pushing water, a second water through opening 11 is arranged at the bottom of the inner side of the third water through opening 12, and the inner diameter of the second water through opening 11 is smaller than that of the third water through opening 12.

The guide plate 3 can guide low-temperature water to move in the first water passage opening 5 on the one hand, and on the other hand can form the separation, prevents that hot water from causing the water fluctuation range in the constant temperature water tank body 1 to be big after coming out from the drive unit, can reach the effect of stabilizing water circulation.

Further optimize the scheme, drive unit includes hot water passageway 17 of fixed connection in 4 tops of baffle, fixedly connected with spiral flange 18 on the hot water passageway 17 inside wall, and hot water passageway 17 is inboard through 16 fixedly connected with motors 15 of a plurality of dead levers, and the below transmission of motor 15 is connected with flexible impeller, and flexible impeller corresponds the setting with third through-flow gate 12, and third through-flow gate 12 is located the inboard bottom of hot water passageway 17, motor 15 and PLC controller electric connection.

After the motor 15 is started, the telescopic impeller is driven to rotate, water on the edge of the telescopic impeller moves into the hot water channel 17 from the third water passing port 12 under the action of centrifugal force, negative pressure is generated in the center of the telescopic impeller, the hot water moves to the center of the telescopic impeller under the combined action of upward movement of the hot water, and then the hot water moves into the hot water channel 17 under the action of the centrifugal force; the hot water moves in the spiral convex plate 18 to generate centrifugal force, and simultaneously, the hot water rises spirally until the hot water is separated from the hot water channel 17, and the hot water moves towards the edge of the constant-temperature water tank body 1 under the centrifugal action and then enters the first water through opening 5 to form a circulation process.

Further optimize the scheme, flexible impeller is including being located the first rotation axis 19 of motor 15 below, first rotation axis 19 and the transmission shaft coupling of motor 15, the lower extreme outside fixedly connected with flexible casing 20 of first rotation axis 19, the vertical sliding connection in below of first rotation axis 19 has second rotation axis 24 and passes flexible casing 20 bottom, the bottom fixedly connected with impeller 14 of second rotation axis 24, impeller 14 is located third water passing opening 12, be provided with spring 22 between second rotation axis 24 and the inboard top of flexible casing 20.

In an initial state, the impeller 14 blocks at the outlet of the third water passing port 12 to form a relative seal, when hot water moves towards the impeller 14, thrust is generated on the impeller 14, so that the impeller 14 slides upwards, the impeller 14 is separated upwards from the third water passing port 12, at this time, the spring 22 is compressed, and the hot water moves into the hot water channel 17 from a gap between the impeller 14 and the third water passing port 12; the telescopic impeller 14 can effectively prevent water from moving from the hot water channel 17 to the heating chamber 6 and affecting the water circulation process.

Further optimize the scheme, the top of second rotation axis 24 and the bottom inner chamber sliding connection of first rotation axis 19, the lateral wall and the 20 diapire sliding connection of telescopic housing of second rotation axis 24, a plurality of slides 21 have vertically been seted up in telescopic housing 20, the equidistant a plurality of sliders 23 that are connected in second rotation axis 24 lateral wall circumference that are located telescopic housing 20, slider 23 and slide 21 looks adaptation, the top of slider 23 is connected spring 22's bottom, the inboard top at telescopic housing 20 is connected on spring 22's top, spring 22 cover is established on the top of second rotation axis 24.

In a further optimized scheme, the rotary pushing paddle 9 comprises a driving motor (not shown in the figure), a transmission shaft of the driving motor is coupled with a blade (not marked in the figure), and the driving motor is electrically connected with the PLC controller.

According to the further optimized scheme, the constant-temperature water tank body 1 is a metal shell, and the metal shell is filled with a heat-insulating material.

The working process of the embodiment is as follows: in the initial state, the spring 22 is in a free state, the impeller 14 is positioned in the third water through opening 12, and the heater 10 is in a stable temperature state; when the temperature sensor senses that the water temperature is lower than the temperature requirement, the PLC responds to the water temperature signal, transmits a starting signal to the motor 15, the driving motor and the heater 10, drives the low-temperature water to move to the heater 10 through the driving motor, improves the heating temperature of the heater 10, and drives the hot water to exchange with the low-temperature water in the heat preservation cavity 2 through the motor 15 to form a circulation process; when the water temperature reaches the specified required range, the motor 15 and the driving motor are stopped, and the heating temperature of the heater 10 is reduced.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.

Claims

1. The utility model provides a constant temperature basin does not have apron heat preservation device which characterized in that: comprises a constant-temperature water tank body (1), a heat preservation cavity (2) is arranged on the upper portion of the inner side of the constant-temperature water tank body (1), a heating cavity (6) is arranged on the lower portion of the inner side of the constant-temperature water tank body (1), a first circulation mechanism is arranged at the bottom of the heat preservation cavity (2), a second circulation mechanism is arranged in the heating cavity (6), a heater (10) is arranged at the center of the second circulation mechanism, the heat preservation cavity (2) is communicated with the heating cavity (6) through a third water through hole (12) and a plurality of first water through holes (5), the third water through hole (12) is arranged below the first circulation mechanism, the first water through holes (5) are arranged at the edge of the bottom of the heat preservation cavity (2), the bottom of the heating cavity (6) is communicated with a water inlet (13), and the upper portion and the lower portion of the inner side wall of the constant-temperature water tank body (1) are respectively connected with a temperature sensor, the temperature sensor and the heater (10) are electrically connected with a PLC (programmable logic controller), and the PLC is electrically connected with the first circulating mechanism;

the second circulation mechanism is including being located spiral plate (7) in heating chamber (6), spiral plate (7) bottom fixed connection be in the inboard bottom of constant temperature basin body (1), spiral plate (7) inboard is provided with a plurality of rotatory promotion oar (9), heater (10) are located the inboard center of spiral plate (7) is just connected the inboard bottom of constant temperature basin body (1), rotatory promotion oar (9) with PLC controller electric connection.

2. The cover-less thermal insulation device for a thermostatic water tank according to claim 1, wherein: spiral plate (7) outside-in is the spiral in proper order and is extended, form helical coiled passage between spiral plate (7), keep away from heater (10) the internal connection of helical coiled passage is a plurality of rotatory promotion oar (9), helical coiled plate (7) be close to the one end at center with be provided with the clearance between heater (10), helical coiled passage's center with third through mouth of a river (12) corresponds the setting, helical coiled passage's top with heating chamber (6) intercommunication, the bottom side limit portion of helical coiled plate (7) is in through a plurality of fixed block (8) fixed connection the inboard bottom of constant temperature water tank body (1), the bottom side center of helical coiled plate (7) with the inboard bottom fixed connection of constant temperature water tank body (1).

3. The cover-less thermal insulation device for a thermostatic water tank according to claim 2, wherein: the centers of the side walls of the spiral plates (7) are sequentially sunken outwards.

4. The cover-less thermal insulation device for a thermostatic water tank according to claim 1, wherein: heat preservation chamber (2) with be provided with baffle (4) between heating chamber (6), baffle (4) fixed connection be in on the inside wall of constant temperature basin body (1), set up in third through-flow mouth (12) the central point of baffle (4) puts, and is a plurality of first through-flow mouth (5) are located the limit portion of baffle (4).

5. The cover-less thermal insulation device for a thermostatic water tank according to claim 4, wherein: the first circulation mechanism comprises a plurality of guide plates (3) which are circumferentially arranged at the edge of the partition plate (4) at equal intervals, any one of the first water through openings (5) is located between the adjacent guide plates (3), the central positions of the guide plates (3) are connected with a driving unit for pushing water, a second water through opening (11) is arranged at the bottom of the inner side of the third water through opening (12), and the inner diameter of the second water through opening (11) is smaller than that of the third water through opening (12).

6. The cover-less thermal insulation device for a thermostatic water tank according to claim 5, wherein: the drive unit includes fixed connection and is in hot water passageway (17) of baffle (4) top, fixedly connected with spiral flange (18) on hot water passageway (17) inside wall, hot water passageway (17) inboard is through a plurality of dead levers (16) fixedly connected with motor (15), the below transmission of motor (15) is connected with flexible impeller, flexible impeller with third delivery port (12) correspond the setting, third delivery port (12) are located hot water passageway (17) inboard bottom, motor (15) with PLC controller electric connection.

7. The cover-less thermal insulation device for a thermostatic water tank according to claim 6, wherein: the telescopic impeller comprises a first rotating shaft (19) located below the motor (15), the first rotating shaft (19) is in shaft connection with a transmission shaft of the motor (15), a telescopic shell (20) is fixedly connected to the outer side of the lower end of the first rotating shaft (19), a second rotating shaft (24) is vertically and slidably connected to the lower portion of the first rotating shaft (19) and penetrates through the bottom of the telescopic shell (20), an impeller (14) is fixedly connected to the bottom end of the second rotating shaft (24), the impeller (14) is located in the third water through opening (12), and a spring (22) is arranged between the second rotating shaft (24) and the inner top of the telescopic shell (20).

8. The cover-less thermal insulation device for a thermostatic water tank according to claim 7, wherein: the top of second rotation axis (24) with the bottom inner chamber sliding connection of first rotation axis (19), the lateral wall of second rotation axis (24) with flexible casing (20) diapire sliding connection, a plurality of slides (21) have vertically been seted up in flexible casing (20), are located in flexible casing (20) second rotation axis (24) lateral wall circumference equidistant connection has a plurality of sliders (23), slider (23) with slide (21) looks adaptation, the top of slider (23) is connected the bottom of spring (22), the top of spring (22) is connected flexible casing (20) inboard top, spring (22) cover is established the top of second rotation axis (24).

9. The cover-less thermal insulation device for a thermostatic water tank according to claim 7, wherein: rotatory promotion oar (9) include driving motor, driving motor's transmission shaft coupling has the blade, driving motor with PLC controller electric connection.