CN205517855U - Thermostatic water bath device - Google Patents

Abstract

The utility model relates to the technical field of experimental equipment, in particular to a constant temperature water bath device, which includes a heating water tank, a water pump, a water bath tank, and a PLC controller with a time and temperature control module. The heating water tank is provided with an electric heater and The first temperature controller, the first temperature controller is connected with the electric heater to control the work of the electric heater. The water bath box is provided with a water bath and a water inlet channel arranged around the upper part of the outer wall of the water bath tank. A number of water inlet holes connected to the inside of the water bath are evenly distributed. The water inlet channel is connected with the outlet pipe of the water pump. The outlet pipe of the water pump is provided with an inlet valve for controlling the on-off of the water inlet channel. The water inlet pipe of the water pump is connected with the heating The water tank is connected, the lower part of the water bath is connected with the external drain pipe, and the external drain pipe is provided with a drain valve for controlling the drainage of the water bath. The electric heater, the first temperature controller, the water pump, the water inlet valve and the drain valve are respectively Connect with PLC controller.

Description

A constant temperature water bath device

technical field

The utility model relates to the technical field of experimental equipment, in particular to a constant temperature water bath device.

Background technique

The constant temperature water bath device is mainly used for distillation, drying, concentration, and incubation of chemicals and biological products in the laboratory. It can also be used for constant temperature heating and other temperature experiments. Laboratory, analysis room, education and scientific research and other necessary equipment, including water bath pot, water bath box, water bath tank, etc., the water level and temperature have a great influence on the test. The existing constant temperature water bath device usually integrates the heating source and the constant temperature water bath into one body. Although it has a compact structure, it needs someone to guard and add water from time to time during the whole water bath process. Hidden dangers, troublesome operation, time-consuming and laborious, low measurement efficiency, and because the water in the water bath is directly heated, it is difficult to control the temperature and keep it constant, and the error is large. In addition, it usually enters the water from one position, which is easy The water temperature distribution is uneven and the temperature control accuracy is low.

Contents of the invention

The purpose of this utility model is to provide a constant temperature water bath device with reasonable design, simple structure, multi-position water inlet, more uniform and stable water temperature, high temperature control precision and easy control of water level in view of the deficiencies of the prior art.

In order to achieve the above object, the utility model adopts the following technical solutions:

A constant temperature water bath device, which includes a heating water tank, a water pump, a water bath tank, and a PLC controller with a time and temperature control module, the heating water tank is provided with an electric heater and a first temperature controller, and the first temperature controller The instrument is connected with the electric heater to control the work of the electric heater. The water bath box is equipped with a water bath and a water inlet channel surrounding the upper part of the outer wall of the water bath. A water inlet hole, the water inlet channel is connected with the outlet pipe of the water pump, and the outlet pipe of the water pump is provided with a water inlet valve for controlling the on-off of the water inlet channel, the water inlet pipe of the water pump is connected with the heating water tank, and the lower part of the water bath is connected with the external drain pipe Connected, the external drain pipe is provided with a drain valve for controlling the on-off drain of the water bath, and the electric heater, the first temperature controller, the water pump, the water inlet valve and the drain valve are respectively connected with the PLC controller.

The lower part of the outer wall of the water bath is provided with a drainage channel connected with the external drain pipe, and several drainage holes connected with the interior of the water bath are evenly distributed on the drainage channel. The design uses multiple drainage holes to drain water, which makes the drainage more uniform and minimizes the impact on the water environment of the water bath.

A low water level sensor and a high water level sensor are provided in the water bath corresponding to the low water level and the high water level respectively, and the low water level sensor and the high water level sensor are respectively connected with the PLC controller for controlling the start and stop of the water pump. This design makes it possible for the low water level sensor to transmit the low water level information to the PLC controller when the low water level sensor senses that the water bath is at a preset low water level. When the high water level sensor senses that the water bath is at a preset high water level, it can transmit the high water level information to the PLC controller, and the PLC controller controls to close the water inlet valve and the water pump, thereby automatically stopping adding water.

A second temperature controller connected to the PLC controller is arranged in the water bath. This design facilitates real-time monitoring of the temperature in the water bath, and transmits the temperature information to the PLC controller to determine whether to replace the constant temperature water.

When using, first set the parameters such as electric heater, first temperature controller, water pump, water inlet valve and drain valve temperature control or action time on the PLC controller, and then control and close the drain valve and open the water inlet through the PLC controller. The valve and the water pump add water. The water pump pumps the constant temperature water heated to the first preset temperature in the heating water tank into the water inlet channel. The constant temperature water flows into the water bath from several water inlet holes. The PLC controller controls and closes the water inlet valve and the water pump, thereby completing the automatic water addition operation, and then places the experimental container that needs to be tested in the water bath tank in the water bath box. As a preference, the water bath box is a box that can be opened and closed; The second temperature controller in the water bath monitors the water temperature in the water bath in real time and transmits the information to the PLC controller. When the water temperature in the water bath is lower than the second preset temperature, the PLC controller controls to open the drain valve for drainage, and at the same time Turn on the water inlet valve and water pump to add water to the water bath until the water temperature in the water bath reaches the second preset temperature or when the low water level sensor senses that the water bath is at a preset low water level, the PLC controller controls to close the drain valve. When the high water level When the sensor senses that the water bath is at a preset high water level, the PLC controller controls to close the water inlet valve and the water pump, thereby completing the operation of automatically replacing the constant temperature water according to the temperature change of the constant temperature water in the water bath; during this period, the first temperature controller real-time Monitor the water temperature in the heating water tank. When it is lower than the first preset temperature, start the electric heater for heating. When it reaches the first preset temperature, turn off the electric heater to stop heating, so that there is always constant temperature water in the heating water tank.

The utility model adopts the above technical scheme, separates the traditional heating source from the constant temperature water bath and independently sets it, and provides constant temperature water with a certain temperature to the water bath, greatly reducing the influence of the heating source on the direct heating of the water bath, and can Avoid safety hazards such as dry heating of the water bath. At the same time, use a number of water inlet holes evenly distributed on the water inlet channel on the outer wall of the water bath to provide constant temperature water for the water bath, which can effectively avoid water temperature stratification caused by uneven water temperature distribution. It has an impact on the test and greatly improves the temperature control accuracy. In addition, the water level in the water bath is strictly controlled by using the low water level sensor and the high water level sensor, which effectively reduces the influence of the water level on the test; the design of the water inlet channel and drainage channel, The water bath is kept insulated by using its surrounding arrangement on the outer wall of the water bath. The utility model has reasonable design, simple structure, porous water inlet, more uniform and stable water temperature, can automatically complete temperature and water level control, and has high temperature control precision and precise water level control, which is conducive to maintaining a constant temperature and stable test environment, and has little influence on the test. Etc.

Description of drawings

Now in conjunction with accompanying drawing, the utility model is further elaborated:

Fig. 1 is the utility model constant temperature water bath device structural representation;

Fig. 2 is the structural representation of water bath box;

Fig. 3 is a schematic diagram of the circuit connection of the utility model.

detailed description

As shown in one of Figures 1-3, the utility model includes a heating water tank 1, a water pump 2, a water bath tank 3, and a PLC controller 6 with a time and temperature control module. The heating water tank 1 is provided with an electric heater 11 and the first temperature controller 12, the first temperature controller 12 is connected with the electric heater 11 to control the operation of the electric heater 11, the water bath box 3 is provided with a water bath 31 and the upper part of the outer wall surrounding the water bath 31 The water inlet channel 32, the water inlet channel 32 is evenly distributed with several water inlet holes 33 communicated with the inside of the water bath 31, the water inlet channel 32 communicates with the water outlet pipe of the water pump 2, and the water outlet pipe of the water pump 2 is provided with for controlling The water inlet valve 51 for turning on and off the water inlet channel, the water inlet pipe of the water pump 2 is connected with the heating water tank 1, the lower part of the water bath 31 is connected with the external drain pipe 4, and the external drain pipe 4 is provided with a drain for controlling the water bath 31 to drain on and off. The valve 52 , the electric heater 11 , the first temperature controller 12 , the water pump 2 , the water inlet valve 51 and the drain valve 52 are respectively connected with the PLC controller 6 .

The lower part of the outer wall of the water bath 31 is provided with a drainage channel 36 communicating with the external drain pipe 4 , and several drainage holes 37 communicating with the interior of the water bath 31 are evenly distributed on the drainage channel 36 . This design adopts a plurality of drainage holes 37 for drainage, so that the drainage is more uniform, and the water environment affecting the water bath 31 is reduced as much as possible.

The water bath 31 is provided with a low water level sensor 34 and a high water level sensor 35 respectively corresponding to the low water level and the high water level, and the low water level sensor 34 and the high water level sensor 35 are respectively connected with the PLC controller 6 for controlling the start and stop of the water pump 2 . This design makes when the low water level sensor 34 senses that the water bath 31 is at a preset low water level, the low water level information can be transmitted to the PLC controller 6, and the PLC controller 6 controls to close the drain valve 52, and open the water inlet valve 51 and The water pump 2 automatically adds water, and when the high water level sensor 35 senses that the water bath 31 is at a preset high water level, it can transmit the high water level information to the PLC controller 6, and the PLC controller 6 controls to close the water inlet valve 51 and the water pump 2, Thereby automatically stop adding water.

The water bath 31 is provided with a second temperature controller 38 connected to the PLC controller 6 . This design facilitates real-time monitoring of the temperature in the water bath 31, and transmits the temperature information to the PLC controller 6 so as to determine whether to replace the constant temperature water.

During use, first set parameters such as temperature control or action time of the electric heater 11, the first temperature controller 12, the water pump 2, the water inlet valve 51 and the drain valve 52 on the PLC controller 6, and control them by the PLC controller 6. Close the drain valve 52, open the water inlet valve 51 and the water pump 2 to add water, the water pump 2 pumps the constant temperature water heated to the first preset temperature in the heating water tank 1 into the water inlet channel 32, and the constant temperature water flows from several water inlet holes 33 After flowing into the water bath 31 and continuing to add water to the preset time, the PLC controller 6 controls the closing of the water inlet valve 51 and the water pump 2, thereby completing the automatic water addition operation, and then placing the experimental containers that need to be tested in the water in the water bath 3. In the bath 31, as preferably, the water bath 3 is an openable and closed sealed casing; the second temperature controller 38 in the water bath 31 monitors the water temperature in the water bath 31 in real time and transmits the information to the PLC controller 6, when When the water temperature in the water bath 31 is lower than the second preset temperature, the PLC controller 6 controls to open the drain valve 52 to drain water, and simultaneously opens the water inlet valve 51 and the water pump 2 to add water to the water bath 31 until the water temperature in the water bath 31 reaches When the second preset temperature or low water level sensor 34 senses that the water bath 31 is at a preset low water level, the PLC controller 6 controls to close the drain valve 52, and when the high water level sensor 35 senses that the water bath 31 is at a preset high water level , the PLC controller 6 controls and closes the water inlet valve 51 and the water pump 2 again, thereby completing the operation of changing the constant temperature water automatically according to the temperature change of the constant temperature water in the water bath tank 31; during the period, the first temperature controller 12 monitors the water temperature in the heating water tank 1 in real time, When it is lower than the first preset temperature, the electric heater 11 is started for heating, and when the first preset temperature is reached, the electric heater 11 is turned off to stop heating, so that there is constant temperature water in the heating water tank 1 all the time.

The utility model adopts the above technical scheme, separates the traditional heating source from the constant temperature water bath and independently sets it, and provides constant temperature water with a certain temperature to the water bath 31, greatly reducing the influence of the heating source on the direct heating of the water bath 31 , can avoid safety hazards such as dry burning of the water bath 31, and at the same time, use a number of water inlet holes 33 evenly distributed on the water inlet channel 32 on the outer wall of the water bath 31 to provide constant temperature water for the water bath 31, which can effectively avoid water temperature stratification etc. lead to uneven distribution of water temperature and affect the test, which greatly improves the temperature control accuracy. In addition, the water level in the water bath 31 is strictly controlled by using the low water level sensor 34 and the high water level sensor 35, which effectively reduces the influence of the water level on the test. ; The design of the water inlet channel 32 and the drainage channel 36 utilizes its surrounding arrangement on the outer wall of the water bath 31 to insulate the water bath 31 . The utility model has reasonable design, simple structure, porous water inlet, more uniform and stable water temperature, can automatically complete temperature and water level control, and has high temperature control precision and precise water level control, which is conducive to maintaining a constant temperature and stable test environment, and has little influence on the test. Etc.

The above description should not limit the protection scope of the present utility model in any way.

Claims (4)

1. null1. a constant temperature water bath apparatus，Including heating water tank、Water pump、Water bath，It is characterized in that: it also includes the PLC having the time with temperature control modules，Electric heater and the first temperature controller it is provided with in described heating water tank，First temperature controller and electric heater are connected to control electric heater work，Water bath and the intake tunnel arranged around top, water bath lateral wall it is provided with in described water bath，Several inlet openings of connecting internal with water bath it are evenly equipped with on intake tunnel，Intake tunnel connects with the outlet pipe of water pump，The outlet pipe of water pump is provided with the water intaking valve for controlling intake tunnel break-make，The water inlet pipe of water pump connects with heating water tank，Water bath bottom and external connection row cross current，External connection row water pipe is provided with the drain valve for controlling water bath draining break-make，Described electric heater、First temperature controller、Water pump、Water intaking valve and drain valve are connected with PLC respectively.
2. A kind of constant temperature water bath apparatus the most according to claim 1, it is characterised in that: bottom, described water bath lateral wall is provided with and the drainage channel of external connection row cross current, and drainage channel is evenly equipped with several osculums of connecting internal with water bath.
3. A kind of constant temperature water bath apparatus the most according to claim 1, it is characterized in that: be provided with low water level sensor and high water level sensor, low water level sensor and high water level sensor at corresponding low water level and high water level respectively in described water bath and be connected to PLC respectively control water pump start and stop.
4. A kind of constant temperature water bath apparatus the most according to claim 1, it is characterised in that: it is provided with the second temperature controller being connected with PLC in described water bath.