Liquid ring type medical negative pressure system
By introducing an automatic liquid level and temperature monitoring system into the liquid ring medical negative pressure system, the problem of negative pressure instability caused by manual monitoring and temperature changes has been solved, achieving automated control and extending equipment life, while reducing human resource waste and bacterial contamination.
Patent Information
- Application Number
- CN202423177837.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-12-23
AI Technical Summary
In existing liquid ring medical negative pressure systems, the working fluid of the gas-liquid separator requires manual monitoring and compensation, and temperature changes affect the performance of the vacuum pump, resulting in unstable negative pressure and a lack of effective cooling measures.
The system uses level transmitters and temperature transmitters in conjunction with solenoid valves and an electrical control cabinet to automatically monitor and regulate the liquid level and temperature in the gas-liquid separator. Automatic control of liquid level and temperature is achieved through an external water supply device. Combined with a bacterial filter and an exhaust sterilizer, it reduces manpower waste and performance degradation.
It enables automatic monitoring and regulation of the liquid level and temperature of the gas-liquid separator, reducing the waste of human resources, maintaining stable negative pressure, extending the life of the vacuum pump, and reducing bacterial contamination.
Smart Images
Figure CN223511111U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of creating negative pressure environments, and more specifically, to a liquid ring medical negative pressure system. Background Technology
[0002] A medical negative pressure system is a widely used device in medical environments, primarily used to provide negative pressure (or a vacuum environment) to assist in various medical procedures and treatments, such as drainage and expulsion of surgical wounds. This system helps remove fluid, pus, or blood from wounds by establishing negative pressure around them, promoting wound healing; it can also help clear secretions, phlegm, and other foreign objects from a patient's airway.
[0003] Medical negative pressure systems typically employ liquid ring negative pressure systems. These systems generally include a liquid ring vacuum pump and a gas-liquid separator. The liquid ring negative pressure system removes air from the hospital's negative pressure pipelines, creating negative pressure within the pipelines. Medical devices used for suction in the hospital are connected to the negative pressure pipelines to utilize this negative pressure. The gas-liquid separator is connected to the exhaust pipe of the liquid ring vacuum pump and also to its inlet pipe, enabling gas-liquid separation of the gas discharged from the liquid ring vacuum pump and recycling the liquid back into the liquid ring vacuum pump to provide working fluid for the negative pressure pump.
[0004] The aforementioned technologies have the following drawbacks: 1. The working fluid of the vacuum pump in the gas-liquid separator requires manual monitoring and replenishment, which is a waste of human resources. 2. The working fluid of the vacuum pump in the gas-liquid separator is prone to temperature rise due to environmental influences. When the high-temperature working fluid is introduced into the vacuum pump, it will cause a decrease in the pump's performance and result in unstable negative pressure. Currently, there are no corresponding cooling measures in the gas-liquid separator to cool the working fluid of the vacuum pump. Utility Model Content
[0005] To address the shortcomings in related technologies, this application provides a liquid ring type medical negative pressure system.
[0006] A liquid ring medical negative pressure system includes a liquid ring vacuum pump, a gas-liquid separator, and an electrical control cabinet. The vacuum pump has a suction pipe connected to its suction end and an exhaust pipe connected to its exhaust end. The exhaust pipe is connected to the input end of the gas-liquid separator. The gas-liquid separator is equipped with a level transmitter, a temperature transmitter, solenoid valve A, and solenoid valve B. All three are connected to a liquid storage chamber within the gas-liquid separator and are signal-connected to the electrical control cabinet. Solenoid valve A is connected to the bottom of the liquid storage chamber, and solenoid valve B is connected to the top of the liquid storage chamber. The gas-liquid separator also has a water outlet pipe, with one end connected to the bottom of the liquid storage chamber and the other end connected to the inlet of the liquid ring vacuum pump.
[0007] Preferably, it also includes a bacterial filter, which is disposed on the air extraction pipe.
[0008] Preferably, it also includes a vacuum tank, which is connected to the suction pipe and the suction pipe is connected to the interior of the vacuum tank, and the vacuum tank is provided with a negative pressure pipe that connects to its interior.
[0009] Preferably, it also includes an exhaust sterilizer, which is provided with a connecting pipe that is connected to the exhaust end of the gas-water separator.
[0010] Preferably, there are two liquid ring vacuum pumps, and the exhaust ends of the two liquid ring vacuum pumps are connected to the same exhaust pipe and the exhaust ends of the two liquid ring vacuum pumps are connected to the same water outlet pipe.
[0011] Preferably, the suction pipe is equipped with an electromagnetic vacuum inflation valve, which is signal-connected to the electrical control cabinet.
[0012] In summary, this application includes at least one of the following beneficial technical effects:
[0013] 1. Connect solenoid valve B to an external water supply device. The liquid storage chamber of the gas-liquid separator stores water, which serves as the working fluid for the liquid ring vacuum pump. Water from the storage chamber is introduced into the liquid ring vacuum pump through the outlet pipe, supplying water to the pump. The gas drawn by the liquid ring vacuum pump is introduced into the gas-liquid separator, where water is separated from the gas, allowing the water to enter the storage chamber, thus achieving water recycling and saving water resources. The gas is discharged from the exhaust end of the gas-liquid separator. A level transmitter senses the water level in the storage chamber and transmits the information to the electrical control cabinet via an electrical signal, enabling water level monitoring in the gas-liquid separator. When the water level drops, the control cabinet opens solenoid valve B, allowing the external water supply device to supply water to the storage chamber of the gas-liquid separator to compensate for the reduced storage level. The water in the chamber ensures the water supply to the liquid ring vacuum pump. The water in the gas-water separator does not require manual monitoring, reducing the waste of human resources. A temperature transmitter senses the temperature of the water in the gas-water separator's storage chamber and transmits the temperature information to the electrical control cabinet via an electrical signal to monitor the water temperature in the gas-water separator. When the water temperature is too high, the electrical control cabinet controls solenoid valve B to open and controls solenoid valve A to open, allowing the external water supply equipment to supply water to the gas-water separator. At the same time, the water in the gas-water separator is discharged from solenoid valve A. The external low-temperature water is used to cool down the high-temperature water in the gas-water separator, and the water is discharged to maintain the water level in the gas-water separator at the required level. This ensures that the water temperature in the gas-water separator is automatically maintained within the normal range, reducing the possibility of a decrease in vacuum pump performance.
[0014] 2. Setting up a vacuum tank helps reduce the starting frequency of the liquid ring vacuum pump and extends its service life.
[0015] 3. Installing bacterial filters and exhaust sterilizers can help reduce the contamination of external air by gases containing contaminated bacteria discharged from the hospital's negative pressure pipes. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of a liquid ring medical negative pressure system according to this embodiment.
[0017] Reference numerals in the attached diagram: 1. Liquid ring vacuum pump; 2. Gas-liquid separator; 21. Liquid level transmitter; 22. Temperature transmitter; 23. Solenoid valve A; 24. Solenoid valve B; 3. Electrical control cabinet; 4. Vacuum pipe; 41. Electromagnetic vacuum charging valve; 5. Exhaust pipe; 6. Bacterial filter; 7. Vacuum tank; 71. Negative pressure pipe; 72. Manifold; 8. Exhaust sterilizer; 81. Connecting pipe. Detailed Implementation
[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0019] Reference Figure 1A liquid ring medical negative pressure system includes a liquid ring vacuum pump 1, a gas-liquid separator 2, and an electrical control cabinet 3. Two liquid ring vacuum pumps 1 are included, each connected to a suction pipe 4 at its suction end. Each suction pipe 4 is equipped with an electromagnetic vacuum inflation valve 41. The electromagnetic vacuum inflation valve 41 maintains the internal air pressure within the suction pipe 4 within a safe and stable range, preventing system malfunctions or dangers due to excessively high or low pressure. The exhaust ends of the two liquid ring vacuum pumps 1 are connected to a common exhaust pipe 5. Specifically… One end of the exhaust pipe 5 is connected to the exhaust end of a liquid ring vacuum pump 1, and the other end of the exhaust pipe 5 is connected to the exhaust end of another liquid ring vacuum pump 1. The input end of the gas-water separator 2 is connected to the middle of the exhaust pipe 5. The gas-water separator 2 is usually a tank. A high-speed rotating centrifuge is installed in the upper part of the tank, and a liquid storage chamber is located in the lower part of the tank. The gas input end is located at the top of the tank, and the exhaust end is located at the position of the centrifuge. In the gas-water separation process, the gas enters the centrifuge through the gas inlet end. Due to the density difference between gas and water... The difference lies in the fact that water droplets, under the influence of centrifugal force, deposit into the storage chamber, achieving gas-liquid separation, while the gas is discharged from the exhaust end. The gas-liquid separator 2 is existing technology and will not be described in detail in this embodiment. The gas separator is equipped with a level transmitter 21, a temperature transmitter 22, a solenoid valve A23, and a solenoid valve B24. The level transmitter 21, temperature transmitter 22, solenoid valve A23, and solenoid valve B24 are all connected to the storage chamber within the gas-liquid separator 2 and are also connected to the electrical control cabinet 3 via signal connections. Solenoid valve A23 connects to the storage chamber of the gas-liquid separator 2. At the bottom of the liquid chamber, solenoid valve B24 connects to the top of the liquid storage chamber of gas-water separator 2. Solenoid valve B24 is connected to an external water supply device. Opening solenoid valve B24 allows the external water supply device to supply water to the liquid storage chamber of gas-water separator 2. Opening solenoid valve A23 allows the water in the liquid storage chamber of gas-water separator 2 to flow out to the outside. Gas-water separator 2 is also equipped with a water outlet pipe, the end of which is closed. The inlets of the two liquid ring vacuum pumps 1 are connected to the water outlet pipe through conduits and are connected to each other. Both liquid ring vacuum pumps 1 are connected to the electrical control cabinet 3 via signal.
[0020] Reference Figure 1Furthermore, a liquid ring medical negative pressure system also includes a bacterial filter 6, a vacuum tank 7, and an exhaust sterilizer 8. There are two vacuum tubes. Each vacuum tank 7 is equipped with a negative pressure tube 71 connecting to its interior and connected to a hospital negative pressure pipe 71. Both vacuum tanks 7 share a common manifold 72, and the interior of each vacuum tank 7 is connected to the manifold 72. Two extraction pipes 4 are connected to and communicate with the manifold 72. A liquid ring vacuum pump 1 extracts gas from the vacuum tank 7 to create a negative pressure environment. This negative pressure environment in the vacuum tank 7 extracts gas from the negative pressure tube 71 and the connected hospital negative pressure pipe 71, creating a negative pressure environment in the hospital negative pressure pipe 71. The vacuum tank 7 stores the extracted gas and maintains the negative pressure environment until the gas pressure reaches equilibrium with the external gas pressure. This configuration helps reduce the starting frequency of the liquid ring vacuum pump 1 and extends its service life. The two liquid ring vacuum pumps 1 are configured as one in standby mode.
[0021] Reference Figure 1 There are two bacterial filters 6, which are respectively installed on two suction pipes 4. The bacterial filters 6 are used to filter bacteria in the gas. Since the gas drawn by the liquid ring vacuum pump 1 is the gas in the medical negative pressure pipeline, which contains a lot of bacteria, the bacterial filters 6 installed on the suction pipes 4 can reduce the amount of bacteria discharged into the outside air through the liquid ring vacuum pump 1 and pollute the air.
[0022] Reference Figure 1 The exhaust sterilizer 8 is equipped with a connecting pipe 81, which is connected to the exhaust end of the gas-water separator 2. The exhaust sterilizer 8 is connected to the exhaust end of the gas-water separator 2 to achieve the discharge of gas from the gas-water separator 2 to the outside and to kill bacteria in the gas before discharge. This further reduces the contamination of the outside gas by the gas containing contaminated bacteria discharged from the hospital negative pressure pipe 71. The exhaust sterilizer 8 and the bacterial filter 6 are both existing technologies and will not be described in detail in this embodiment.
[0023] The implementation principle of the liquid ring medical negative pressure system disclosed in this application is as follows: Water is stored in the storage chamber of the gas-water separator 2. The liquid ring vacuum pump 1 and vacuum inflation valve are opened via the control cabinet. The gas-water separator introduces the water into the liquid ring vacuum pump 1 through the water outlet pipe, causing the liquid ring vacuum pump 1 to pump air. Through the air extraction pipe 4, the collecting pipe, and the air in the vacuum tank 7, a negative pressure is generated in the vacuum tank 7. The negative pressure environment in the vacuum tank 7 extracts gas from the negative pressure pipe 71 and the hospital negative pressure pipe 71 connected to it, thus improving the hospital's negative pressure system. The negative pressure environment generated by the pressure pipe 71 supports the operation of the hospital's suction equipment. The gas in the negative pressure pipe 71 is drawn into the suction pipe 4 and filtered by the bacterial filter 6. The gas then enters the gas-liquid separator through the exhaust pipe 5. The gas-liquid separator 2 removes water from the gas and allows the water to enter the storage chamber, realizing water recycling and saving water resources. The gas is then discharged from the exhaust end of the gas-liquid separator 2 to the exhaust sterilizer 8. The exhaust sterilizer 8 kills the bacteria in the gas before discharging it to the outside.
[0024] Solenoid valve B24 is connected to an external water supply device. The level transmitter 21 senses the water level in the storage chamber and transmits the information to the control cabinet 3 via an electrical signal to monitor the water level in the gas-water separator 2. When the water level drops, the control cabinet 3 controls solenoid valve B24 to open, allowing the external water supply device to supply water to the storage chamber of the gas-water separator 2 to compensate for the water level and ensure the water supply from the liquid ring vacuum pump 1. The water in the gas-water separator 2 does not require manual monitoring, reducing the waste of manpower. Temperature transmitter 22 senses the temperature of the water in the storage chamber of the gas-water separator 2 and transmits the temperature information. Information is transmitted to the electrical control cabinet 3 via electrical signals to monitor the water temperature in the gas-water separator 2. When the water temperature is too high, the electrical control cabinet 3 controls the solenoid valve B24 to open and the solenoid valve A23 to open, so that the external water supply equipment supplies water to the gas-water separator 2. At the same time, the water in the gas-water separator 2 is discharged from the solenoid valve A23. The external low-temperature water is used to cool down the high-temperature water in the gas-water separator 2. At the same time, the water is discharged to keep the water level in the gas-water separator 2 at the required level, so that the water temperature in the gas-water separator 2 is automatically kept within the normal range, reducing the possibility of a decrease in the performance of the vacuum pump.
[0025] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A liquid ring type medical negative pressure system, characterized in that: The system includes a liquid ring vacuum pump, a gas-liquid separator, and an electrical control cabinet. The pumping end of the liquid ring vacuum pump is connected to a pumping pipe, and the exhaust end of the pump is connected to an exhaust pipe. The exhaust pipe is connected to the input end of the gas-liquid separator. The gas-liquid separator is equipped with a level transmitter, a temperature transmitter, solenoid valve A, and solenoid valve B. The level transmitter, temperature transmitter, solenoid valve A, and solenoid valve B are all connected to the liquid storage chamber inside the gas-liquid separator and are all signal-connected to the electrical control cabinet. Solenoid valve A is connected to the bottom end of the liquid storage chamber of the gas-liquid separator, and solenoid valve B is connected to the top end of the liquid storage chamber of the gas-liquid separator. The gas-liquid separator is also equipped with a water outlet pipe. One end of the water outlet pipe is connected to the liquid storage chamber of the gas-liquid separator, and the other end is connected to the inlet of the liquid ring vacuum pump.
2. The liquid ring type medical negative pressure system according to claim 1, characterized in that: It also includes a bacterial filter, which is disposed on the air extraction tube.
3. The liquid ring type medical negative pressure system according to claim 1, characterized in that: It also includes a vacuum tank, which is connected to the suction pipe and the suction pipe is connected to the interior of the vacuum tank, and the vacuum tank is provided with a negative pressure pipe that connects to its interior.
4. The liquid ring type medical negative pressure system according to claim 1, characterized in that: It also includes an exhaust sterilizer, which is provided with a connecting pipe that is connected to the exhaust end of the gas-water separator.
5. The liquid ring type medical negative pressure system according to claim 1, characterized in that: The liquid ring vacuum pumps are of two types, and the exhaust ends of the two liquid ring vacuum pumps are connected to the same exhaust pipe and the exhaust ends of the two liquid ring vacuum pumps are connected to the same water outlet pipe.
6. The liquid ring type medical negative pressure system according to claim 1, characterized in that: An electromagnetic vacuum inflation valve is installed on the air extraction pipe, and the electromagnetic vacuum inflation valve is connected to the electrical control cabinet via a signal connection.