Full-automatic water injection type vacuum unit

Abstract

The utility model belongs to the technical field of water jet type vacuum units, and particularly relates to a full-automatic water jet type vacuum unit which comprises a PLC, a water tank, a circulating pump and a water jet type vacuum pump, the water jet type vacuum pump and the circulating pump are both electrically connected with the PLC, and a tail gas exhaust pipe is installed on the water tank. The lower portion of the water tank is communicated with the circulating pump through a pipeline, the circulating pump is communicated with the water jet type vacuum pump through a middle pipe, the water jet type vacuum pump is communicated with the upper portion of the water tank through a pipeline, the water jet type vacuum pump is communicated with a vacuum buffering air inlet set, a condensation cooling set is installed on the middle pipe, and a temperature transmitter is installed on the water tank. The temperature transmitter and the condensation cooling set are electrically connected with the PLC. Condensation and regular water changing can be automatically completed in the using process, so that it is guaranteed that the vacuum degree generated by the water jet type vacuum pump is within the requirement range of process production, long-term stable operation of a vacuum unit is guaranteed, and manual operation is reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of water jet vacuum units, and particularly relates to a fully automatic water jet vacuum unit. Background Art

[0002] At present, water jet vacuum units are suitable for occasions with acidic gases. They have a simple structure and low price, and are widely used in the production process of chemical synthetic bulk drugs.

[0003] However, affected by the environmental temperature and gas phase temperature, the water temperature in the vacuum unit is too high, thus reducing the vacuum degree of the unit. During use, condensation and regular water replacement are required, and the frequency of manual operation is relatively high. If not operated in time, it will affect the normal operation of production and the stability of the long-term operation of the vacuum unit. Summary of the Utility Model

[0004] The purpose of this utility model is to provide a fully automatic water jet vacuum unit, which can automatically complete condensation and regular water replacement during use, so as to ensure that the vacuum degree generated by the water jet vacuum pump is within the required range of process production, ensure the long-term stable operation of the vacuum unit, and reduce manual operation.

[0005] The technical solutions adopted by this utility model are specifically as follows:

[0006] A fully automatic water jet vacuum unit includes a PLC controller, a water tank, a circulation pump, and a water jet vacuum pump. The water jet vacuum pump and the circulation pump are both electrically connected to the PLC controller. A tail gas discharge pipe is installed on the water tank. The lower part of the water tank and the circulation pump are connected through a pipeline. The circulation pump and the water jet vacuum pump are connected through an intermediate pipe. The upper part of the water jet vacuum pump and the water tank are connected through a pipeline. The water jet vacuum pump is connected to a vacuum buffer air intake group.

[0007] A condensation and cooling group is installed on the intermediate pipe. A temperature transmitter is installed on the water tank. The temperature transmitter and the condensation and cooling group are both electrically connected to the PLC controller.

[0008] An automatic water replacement group electrically connected to the PLC controller is installed on the water tank.

[0009] Further, the vacuum buffer air intake group includes a vacuum buffer tank and an air chamber. The vacuum buffer tank, the air chamber, and the water jet vacuum pump are sequentially connected through pipelines.

[0010] Further, the condensation and cooling group includes a condenser installed on the intermediate pipe. A first refrigerant cut-off valve is installed at the water inlet end of the condenser. A second refrigerant cut-off valve is installed at the water outlet end of the condenser. The first refrigerant cut-off valve and the second refrigerant cut-off valve are both electrically connected to the temperature transmitter.

[0011] Further, the automatic water changing group includes a process water cut-off valve and a waste water cut-off valve both electrically connected to the PLC controller. The waste water cut-off valve is communicated with the bottom of the water tank through a pipeline, and the process water cut-off valve is communicated with the upper part of the water tank through a pipeline.

[0012] Further, an online pH meter is installed on the pipe body of the intermediate pipe between the circulating pump and the condenser, and the online pH meter is electrically connected to the PLC controller.

[0013] Further, the circulating pump is electrically connected with a remote start-stop module, and the remote start-stop module is signal-connected with a remote control host.

[0014] The technical effects achieved by this utility model are as follows:

[0015] By setting a condensation and cooling group to automatically cool the water flow and an automatic water changing group to perform automatic water change, the fully automatic water jet vacuum unit of this utility model can automatically complete condensation and regular water change during use, reduce the water temperature inside the water jet vacuum pump, thereby ensuring that the vacuum degree generated by the water jet vacuum pump is within the required range of process production, ensuring the long-term stable operation of the vacuum unit, and reducing manual operation. Description of the Drawings

[0016] Figure 1 is the structural schematic diagram of this utility model.

[0017] In the drawings, the list of components represented by each reference numeral is as follows:

[0018] 1, vacuum buffer tank; 2, air chamber; 3, water tank; 4, water jet vacuum pump; 5, circulating pump; 6, condenser; 7, temperature transmitter; 8, first refrigerant cut-off valve; 9, online pH meter; 10, process water cut-off valve; 11, waste water cut-off valve; 12, second refrigerant cut-off valve; 13, tail gas discharge pipe. Specific Embodiments

[0019] In order to make the purpose and advantages of this utility model clearer, the following specifically describes this utility model with reference to the embodiments. It should be understood that the following text is only used to describe one or several specific implementation manners of this utility model, and does not strictly limit the specific protection scope claimed by this utility model.

[0020] As Figure 1 shown, a fully automatic water jet vacuum unit includes a PLC controller, a water tank 3, a circulating pump 5 and a water jet vacuum pump 4. Both the water jet vacuum pump 4 and the circulating pump 5 are electrically connected to the PLC controller;

[0021] An exhaust gas discharge pipe 13 is installed at the upper part of the water tank 3. The lower part of the water tank 3 is connected to the circulation pump 5 through a pipeline. The circulation pump 5 and the water jet vacuum pump 4 are connected through an intermediate pipe. The water jet vacuum pump 4 and the upper part of the water tank 3 are connected through a pipeline. When the circulation pump 5 and the water jet vacuum pump 4 are started, the water at the bottom of the water tank 3 will be pumped out and conveyed to the inside of the water tank 3 from the top of the water tank 3.

[0022] Moreover, the water jet vacuum pump 4 is connected to a vacuum buffer air intake group. The vacuum buffer air intake group is connected to the vacuum main pipe. Through the vacuum buffer air intake group and the vacuum main pipe, the water jet vacuum pump 4 can be supplied with gas.

[0023] Specifically, the vacuum buffer air intake group includes a vacuum buffer tank 1 and an air chamber 2. The vacuum buffer tank 1 is connected to the vacuum main pipe through a pipeline. The vacuum buffer tank 1, the air chamber 2 and the water jet vacuum pump 4 are sequentially connected through pipelines. When admitting air, the vacuum buffer tank 1 and the air chamber 2 can absorb the instantaneous impact of gas explosion and stabilize the pressure fluctuation of the system to maintain pressure stability.

[0024] In order to achieve the purpose of cooling the inside of the water tank 3 and the water jet vacuum pump 4, a condensation cooling group is installed on the intermediate pipe. A temperature transmitter 7 is installed on the water tank 3. Both the temperature transmitter 7 and the condensation cooling group are electrically connected to the PLC controller. When the temperature transmitter 7 monitors that the temperature inside the water tank 3 exceeds the set value, the PLC controller starts the condensation cooling group to cool the water flow inside the intermediate pipe. The cooled water is re-conveyed to the inside of the water tank 3 through the water jet vacuum pump 4, and then the cooling treatment of the inside of the water tank 3 and the water jet vacuum pump 4 can be completed, and the temperature of the water tank 3 can be controlled within the required range. By reducing the temperature of the water source of the water jet vacuum pump 4, the internal temperature of the water jet vacuum pump 4 can be reduced, so as to ensure that the vacuum degree generated by the water jet vacuum pump 4 is within the required range of process production.

[0025] As Figure 1 shown, one structure of the condensation cooling group is introduced here. The condensation cooling group includes a condenser 6 installed on the intermediate pipe. A first refrigerant cut-off valve 8 is installed at the water inlet end of the condenser 6, and a second refrigerant cut-off valve 12 is installed at the water outlet end of the condenser 6. Both the first refrigerant cut-off valve 8 and the second refrigerant cut-off valve 12 are electrically connected to the temperature transmitter 7. When the first refrigerant cut-off valve 8 is started, the refrigerant can be conveyed into the inside of the condenser 6 to cool the water flow inside the intermediate pipe. When the second refrigerant cut-off valve 12 is opened, the ineffective refrigerant inside the condenser 6 will flow back.

[0026] As Figure 1As shown in the figure, an automatic water changing group electrically connected to the PLC controller is installed on the water tank 3. The automatic water changing group includes a process water cut-off valve 10 and a waste water cut-off valve 11 that are electrically connected to the PLC controller. The waste water cut-off valve 11 is communicated with the bottom of the water tank 3 through a pipeline. After the waste water cut-off valve 11 is opened, the waste water inside the water tank 3 can be discharged into the waste water tank. After the drainage is completed, the waste water cut-off valve 11 is automatically closed, and the process water cut-off valve 10 is opened. The process water cut-off valve 10 is communicated with the process water, and the process water cut-off valve 10 is communicated with the upper part of the water tank 3 through a pipeline. After the process water cut-off valve 10 is opened, water can be supplied to the water tank 3 to complete the water changing work of the water tank 3.

[0027] Moreover, an on-line pH meter 9 is installed on the pipe body of the intermediate pipe between the circulating pump 5 and the condenser 6. The on-line pH meter 9 is electrically connected to the PLC controller. When the on-line pH meter 9 detects that the pH value of the water inside the intermediate pipe is lower than the set value, the process water cut-off valve 10 is opened through the PLC controller to supply water into the water tank 3. When the on-line pH meter 9 detects that the pH value of the water inside the intermediate pipe reaches the process requirement range, the process water cut-off valve 10 is closed.

[0028] The circulating pump 5 is electrically connected with a remote start-stop module, and the remote start-stop module is signal-connected with a remote control host. Thus, the remote start-stop of the circulating pump 5 can be realized through the remote control host, and the state of the circulating pump 5 can be remotely monitored through the remote control host.

[0029] The working principle of this utility model is as follows: By starting the water jet vacuum pump 4 and the circulating pump 5, the water at the bottom of the water tank 3 is pumped out and transported to the inside of the water tank 3 from the top of the water tank 3. During the flow of the water, the temperature transmitter 7 monitors the water flow temperature inside the water tank 3. When the temperature transmitter 7 monitors that the temperature inside the water tank 3 exceeds the set value, the PLC controller starts the first refrigerant cut-off valve 8. After the first refrigerant cut-off valve 8 is started, the refrigerant can be transported into the condenser 6 to cool the water flow inside the intermediate pipe. The cooled water is re-transported into the water tank 3 through the water jet vacuum pump 4, and thus the cooling treatment of the inside of the water tank 3 and the water jet vacuum pump 4 can be completed.

[0030] When the on-line pH meter 9 detects that the pH value of the water inside the intermediate pipe is lower than the set value, the process water cut-off valve 10 is opened through the PLC controller to supply water into the water tank 3. When the on-line pH meter 9 detects that the pH value of the water inside the intermediate pipe reaches the process requirement range, the process water cut-off valve 10 is closed.

[0031] When water replacement is required, open the waste water cut-off valve 11. After the waste water cut-off valve 11 is opened, the waste water inside the water tank 3 can be discharged into the waste water tank. After the drainage is completed, the waste water cut-off valve 11 is automatically closed, and the process water cut-off valve 10 is opened. After the process water cut-off valve 10 is opened, water can be supplied to the water tank 3 to complete the water replacement work for the water tank 3.

[0032] In summary, in this technical solution, the condensation cooling group is set to automatically cool the water flow, and the automatic water replacement group is set to perform automatic water replacement, so that condensation and regular water replacement can be automatically completed during use, the water temperature inside the water jet vacuum pump 4 can be reduced, thereby ensuring that the vacuum degree generated by the water jet vacuum pump 4 is within the requirements of the process production, ensuring the long-term stable operation of the vacuum unit, and reducing manual operation.

[0033] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model. The structures, devices, and operation methods not specifically described and explained in the present utility model, unless otherwise specified and limited, are implemented according to the conventional means in this field.

Claims

1. A fully automated water jet vacuum unit, characterized in that: The invention comprises a PLC controller, a water tank (3), a circulation pump (5) and a water jet vacuum pump (4), wherein the water jet vacuum pump (4) and the circulation pump (5) are both electrically connected to the PLC controller, an exhaust gas discharge pipe (13) is installed on the water tank (3), the lower part of the water tank (3) and the circulation pump (5) are connected through a pipeline, the circulation pump (5) and the water jet vacuum pump (4) are connected through an intermediate pipe, the water jet vacuum pump (4) and the upper part of the water tank (3) are connected through a pipeline, and the water jet vacuum pump (4) is connected to a vacuum buffer air intake group; A condensation and cooling group is installed on the intermediate pipe, a temperature transmitter (7) is installed on the water tank (3), and both the temperature transmitter (7) and the condensation and cooling group are electrically connected to a PLC controller; The water tank (3) is equipped with an automatic water changing group electrically connected to the PLC controller.

2. A fully automated water jet vacuum unit according to claim 1, characterized in that: The vacuum buffer air intake group comprises a vacuum buffer tank (1) and an air chamber (2); the vacuum buffer tank (1), the air chamber (2) and a water jet vacuum pump (4) are connected in sequence via a pipeline.

3. A fully automated water jet vacuum unit according to claim 1, characterized in that: The condensation and cooling group includes a condenser (6) installed on an intermediate tube, a first refrigerant shut-off valve (8) is installed at the water inlet end of the condenser (6), and a second refrigerant shut-off valve (12) is installed at the water outlet end of the condenser (6), and the first refrigerant shut-off valve (8) and the second refrigerant shut-off valve (12) are both electrically connected to a temperature transmitter (7).

4. A fully automated water jet vacuum unit according to claim 1, characterized in that: The automatic water exchange group comprises a process water shut-off valve (10) and a waste water shut-off valve (11) electrically connected to the PLC controller; the waste water shut-off valve (11) is connected to the bottom of the water tank (3) through a pipeline; and the process water shut-off valve (10) and the upper part of the water tank (3) are connected through a pipeline.

5. A fully automated water jet vacuum unit according to claim 4, characterized in that: An online pH meter (9) is installed on the pipe body of the intermediate pipe located between the circulation pump (5) and the condenser (6), and the online pH meter (9) is electrically connected to the PLC controller.

6. A fully automated water jet vacuum unit according to claim 1, characterized in that: The circulation pump (5) is electrically connected to a remote start-stop module, and the remote start-stop module signal is connected to a remote control host.

Images