Negative pressure generation system and waste liquid collection equipment with same

Abstract

The utility model relates to a negative pressure generating system and waste liquid collecting equipment with the same, the negative pressure generating system comprises a communication control device, a filtering device and a vacuum pump, the communication control device is used for controlling the connection and disconnection of the negative pressure generating system and a tank body, the filtering device is arranged between the communication control device and the vacuum pump, and the vacuum pump is used for controlling the connection and disconnection of the negative pressure generating system and the tank body. The filter is used for filtering airflow pumped out by the vacuum pump; the filtering device comprises a shell, an air inlet, an air outlet, a first-stage filter element and a second-stage filter element, the air inlet and the air outlet are formed in the shell, the air inlet is communicated with the communication control device, the air outlet is communicated with the vacuum pump, an air flow channel for air flow to flow is formed in the shell, and the first-stage filter element is communicated with the second-stage filter element. The first-stage filter element and the second-stage filter element are sequentially arranged in the airflow channel in the airflow flowing direction. The negative pressure generating system can well prevent impurities and water vapor in the waste liquid collecting tank from entering the vacuum pump.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment technology, and in particular to a negative pressure generating system and a waste liquid collection device having the same. Background Technology

[0002] During certain surgical procedures, waste of various types, including liquids, semi-solids, and solids, is inevitably generated. Examples include bodily fluids such as blood, irrigation solutions introduced into the surgical site, fragments of human tissue, and small pieces of surgical materials. These wastes need to be collected promptly to prevent contamination of the surgical site and to avoid them becoming biohazardous materials in the operating room or other locations where surgical procedures are performed.

[0003] In existing technologies, waste materials are generally collected in waste liquid collection equipment. This equipment typically includes a waste liquid collection tank, a waste liquid filtration device, and a negative pressure generating system, both of which are connected to the waste liquid collection tank. During operation, one end of the suction tube is placed at the surgical site, and the other end is connected to the waste liquid filtration device. Then, the negative pressure generating system is activated, creating negative pressure within the waste liquid collection tank. Under this negative pressure, the waste liquid from the surgical site is filtered through the waste liquid filtration device before entering the waste liquid collection tank, thus completing the collection of the waste liquid.

[0004] However, in the existing technology, because the waste liquid collection tank needs a large negative pressure to absorb the waste liquid from the surgical site, during the process of generating negative pressure in the negative pressure generation system, impurities and water vapor in the waste liquid collection tank will enter the vacuum pump along with the airflow, which can easily damage the vacuum pump. Utility Model Content

[0005] This invention provides a negative pressure generating system and a waste liquid collection device having the same. The negative pressure generating system can effectively prevent impurities and water vapor in the waste liquid collection tank from entering the vacuum pump.

[0006] This utility model provides a negative pressure generating system, including a connection control device, a filter device, and a vacuum pump. The connection control device is used to control the connection and disconnection between the negative pressure generating system and the tank. The filter device is disposed between the connection control device and the vacuum pump and is used to filter the airflow extracted by the vacuum pump. The filter device includes a housing, an air inlet, an air outlet, a first-stage filter element, and a second-stage filter element. The air inlet and the air outlet are disposed on the housing. The air inlet is connected to the connection control device, and the air outlet is connected to the vacuum pump. An airflow channel for airflow is formed inside the housing. The first-stage filter element and the second-stage filter element are sequentially disposed in the airflow channel along the airflow direction.

[0007] Furthermore, the housing includes a first receiving shell, a second receiving shell, and a filter element fixing shell. The first receiving shell and the second receiving shell are detachably combined into one unit to form a receiving space. The filter element fixing shell is fixed in the receiving space, and the first-stage filter element and the second-stage filter element are disposed in the filter element fixing shell.

[0008] Furthermore, the filter element fixing shell includes a first accommodating portion and a second accommodating portion connected to the first accommodating portion, wherein the first-stage filter element is disposed in the first accommodating portion and the second-stage filter element is disposed in the second accommodating portion.

[0009] Furthermore, a filter element screen is provided at the end of the first accommodating portion away from the second accommodating portion to fix the first-stage filter element, and a fixing structure is provided in the second accommodating portion to fix the second-stage filter element.

[0010] Furthermore, the air inlet and the air outlet are located on the same side of the housing.

[0011] Furthermore, the communication control device includes a connecting cylinder and a one-way valve. One end of the connecting cylinder is connected to the tank body, and the other end is connected to the filter device. The one-way valve is disposed inside the connecting cylinder and is configured to open when negative pressure is generated by the vacuum pump and close when the negative pressure disappears.

[0012] Furthermore, the communication control device also includes a float and a float valve plate connected to the float. The float valve plate is disposed inside the connecting cylinder. When the float rises to a set height, the float valve plate closes the connecting cylinder to disconnect the negative pressure generating system from the inside of the tank.

[0013] Furthermore, the connecting cylinder includes a one-way valve fixing cylinder and a buffer cylinder connected to the one-way valve fixing cylinder. The one-way valve is fixed inside the one-way valve fixing cylinder. The end of the buffer cylinder away from the one-way valve fixing cylinder is used to connect to the tank body. A guide plate is provided at the bottom of the buffer cylinder, and a guide cylinder is provided on the guide plate. A first guide rod is formed on the float. A float valve plate is provided at the end of the first guide rod. The first guide rod is movably disposed inside the guide cylinder along its own axis. The size of the float valve plate is larger than the size of the top opening of the guide cylinder, so that when the float falls, the float valve plate supports the top of the guide cylinder and closes the top opening of the guide cylinder.

[0014] Furthermore, a second guide rod is provided on the float. One end of the second guide rod is connected to the float valve plate, and the other end extends into the one-way valve fixing cylinder. The size of the bottom opening of the one-way valve fixing cylinder is smaller than the size of the float valve plate, so that when the float rises to a set height, the float valve plate is supported on the bottom opening of the one-way valve fixing cylinder and the bottom opening of the one-way valve fixing cylinder is closed.

[0015] This utility model also provides a waste liquid collection device, including the above-mentioned negative pressure generating system.

[0016] This utility model also provides a waste liquid collection device, which includes the aforementioned negative pressure generating system. The connecting cylinder of the aforementioned negative pressure generating system can be fixedly installed on the cover plate of the waste liquid collection tank of the waste liquid collection device. For other technical features of this waste liquid collection device, please refer to the prior art, which will not be repeated here.

[0017] Furthermore, by setting a second elastic element on the guide rod, it is possible to better prevent the first support plate from tilting up at the end where the second elastic element is located, so as to better connect the various joints.

[0018] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0019] Figure 1 The diagram shown is a structural schematic of the negative pressure generating system provided in this embodiment of the present invention when it is installed on a waste liquid collection device.

[0020] Figure 2 As shown Figure 1 A schematic diagram of the structure of the filter device and the fixed base.

[0021] Figure 3 As shown Figure 1 A schematic diagram of the exploded structure of the filter device.

[0022] Figure 4 The diagram shown is a side view of the filter device.

[0023] Figure 5 As shown Figure 4 A schematic diagram of the cross-sectional structure in the VV direction.

[0024] Figure 6 The diagram shown is an axial side view of the internal communication control device of the negative pressure generating system provided in this embodiment of the present invention, located on the tank cover of the waste liquid collection tank.

[0025] Figure 7 As shown Figure 6 A top view of the related structures.

[0026] Figure 8 The diagram shown is a cross-sectional structural schematic of the communication control device.

[0027] Figure 9 The diagram shown is an exploded view of the connectivity control device.

[0028] Reference numerals: 10. Connecting control device; 11. Connecting cylinder; 111. One-way valve fixing cylinder; 112. Buffer cylinder; 113. Guide plate; 114. Guide cylinder; 12. One-way valve; 13. Float; 131. First guide rod; 132. Second guide rod; 14. Float valve plate; 15. Elbow joint; 151. Joint buckle; 20. Filter device; 21. Housing; 211. First receiving housing; 212. Filter element 2121, Fixed housing; 2122, First accommodating part; 2123, Second accommodating part; 2123, Filter element screen; 2124, Fixed structure; 213, Second accommodating housing; 22, Air inlet; 23, Air outlet; 24, First stage filter element; 25, Second stage filter element; 26, Sealing ring; 30, Vacuum pump; 40, Waste liquid collection tank; 50, Fixed base; 61, First pipeline; 62, Second pipeline; 70, Proportional valve. Detailed Implementation

[0029] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the present utility model will be described in detail below with reference to the accompanying drawings and preferred embodiments.

[0030] This invention provides a negative pressure generating system and a waste liquid collection device having the same. The negative pressure generating system can effectively prevent impurities and water vapor in the waste liquid collection tank from entering the vacuum pump.

[0031] Figure 1 The diagram shows a schematic representation of the negative pressure generating system provided in this embodiment of the invention when it is installed on a waste liquid collection device. Figure 1 As shown, the negative pressure generating system provided in this embodiment of the present invention includes a connection control device 10, a filter device 20, and a vacuum pump 30. The connection control device 10 is used to control the connection and disconnection between the negative pressure generating system and a tank, such as the waste liquid collection tank 40 of a waste liquid collection device. The filter device 20 is disposed between the connection control device 10 and the vacuum pump 30 and is used to filter the airflow extracted by the vacuum pump 30.

[0032] When generating negative pressure, the vacuum pump 30 is started, and the negative pressure generating system is connected to the tank via the connection control device 10. The negative pressure generating system then extracts air from the tank to create a vacuum. During the extraction process, the airflow passes through the filter device 20 to filter out impurities and moisture, thereby protecting the vacuum pump 30.

[0033] Figure 2 As shown Figure 1 A schematic diagram of the structure of the filter device and the fixed base. Figure 3 As shown Figure 1 Exploded view of the intermediate filtration device. Figure 4 The diagram shown is a side view of the filter device. Figure 5 As shown Figure 4 A schematic diagram of the cross-sectional structure in the VV direction. (See diagram below.) Figures 2 to 5 As shown, in this embodiment, the filter device 20 can be fixed to a stationary component, such as the bracket of a waste liquid collection device, via a fixed base 50.

[0034] The filtration device 20 may include a housing 21, an air inlet 22, an air outlet 23, a first-stage filter element 24, and a second-stage filter element 25. The air inlet 22 and the air outlet 23 are formed on the housing 21. An airflow channel for airflow is formed inside the housing 21. The first-stage filter element 24 and the second-stage filter element 25 are arranged sequentially in the airflow channel along the airflow direction.

[0035] In use, the air inlet 22 can be connected to the control device 10 through the first pipe 61, and the air outlet 23 can be connected to the vacuum pump 30 through the second pipe 62.

[0036] After the vacuum pump 30 is started, the airflow enters the filter device 20 through the air inlet 22, passes through the first-stage filter element 24 and the second-stage filter element 25 to filter impurities and moisture in the airflow, and the filtered airflow enters the vacuum pump 30 to avoid damage to the vacuum pump 30. The multi-stage filter element arrangement can better absorb impurities and moisture in the airflow.

[0037] Furthermore, in this embodiment, the first-stage filter element 24 can be filter paper to initially filter impurities in the airflow; the second-stage filter element 25 can be activated carbon and / or foam to further filter impurities in the airflow and absorb moisture in the airflow.

[0038] Please continue to refer to Figure 3 and Figure 5In this embodiment, the housing 21 includes a first receiving housing 211, a filter element fixing housing 212, and a second receiving housing 213. The first receiving housing 211 and the second receiving housing 213 are detachably combined into one unit to form a receiving space, and the filter element fixing housing 212 is fixed within this receiving space. The aforementioned first-stage filter element 24 and second-stage filter element 25 are disposed within the filter element fixing housing 212. In this embodiment, the second receiving housing 213 can exist in the form of an end cap, that is, the filter element fixing housing 212 is completely placed within the first receiving housing 211, and the second receiving housing 213 is disposed on the first receiving housing 211 as an end cap.

[0039] When replacing the first-stage filter element 24 and the second-stage filter element 25, the first receiving shell 211 and the second receiving shell 213 can be disassembled, and the filter element fixing shell 212 can be replaced directly to save the time of replacing the filter element, while ensuring the installation accuracy of the first-stage filter element 24 and the second-stage filter element 25.

[0040] Furthermore, a sealing ring 26 is provided between the first receiving shell 211 and / or the second receiving shell 213 and the filter element fixing shell 212 to increase the sealing performance.

[0041] Please continue to refer to Figure 3 and Figure 5 In this embodiment, the filter element fixing shell 212 includes a first accommodating portion 2121 and a second accommodating portion 2122 connected to the first accommodating portion 2121. The first-stage filter element 24 is disposed in the first accommodating portion 2121. A filter element screen 2123 is also provided at the end of the first accommodating portion 2121 away from the second accommodating portion 2122 to fix the first-stage filter element 24. A plurality of fixing structures 2124, such as fixing posts or partitions with gaps, are provided in the second accommodating portion 2122 to fix the second-stage filter element 25.

[0042] To facilitate the installation of pipelines and the connection with the control device 10 and the vacuum pump 30, in this embodiment, the air inlet 22 and the air outlet 23 can be located on the same side of the housing 21.

[0043] like Figure 5 As shown, the air inlet 22 is connected to the second accommodating portion 2122 via the first accommodating portion 2121, and the second accommodating portion 2122 is connected to the air outlet 23. In other words, the airflow channel within the housing 21 is U-shaped.

[0044] Furthermore, please continue to refer to Figure 1 In this embodiment, a proportional valve 70 is also provided between the communication control device 10 and the filter device 20 to facilitate the control of the airflow.

[0045] Figure 6The diagram shown is an axial side view of the internal communication control device of the negative pressure generating system provided in this embodiment of the invention, located on the tank cover of the waste liquid collection tank. Figure 7 As shown Figure 6 A top view of the relevant structures in the diagram. Figure 8 The diagram shown is a cross-sectional structural schematic of the communication control device. Figure 9 The diagram shown is an exploded view of the connectivity control device. Figures 6 to 9 As shown, the communication control device 10 includes a connecting cylinder 11 and a one-way valve 12. One end of the connecting cylinder 11 is connected to a tank, such as the waste liquid collection tank 40 of a waste liquid collection device, and the other end is connected to the filter device 20 through a first pipeline 61. The one-way valve 12 is disposed inside the connecting cylinder 11 and is configured to open when negative pressure is generated by the vacuum pump 30 and close when the negative pressure disappears.

[0046] In this embodiment, when the vacuum pump 30 generates negative pressure, the one-way valve 12 can open due to the negative pressure, so that the negative pressure generating system is connected to the inside of the tank, thereby generating negative pressure inside the tank; when the vacuum pump 30 stops working, the negative pressure disappears, the one-way valve 12 closes, cutting off the connection between the negative pressure generating system and the inside of the tank, so that the inside of the tank remains sealed.

[0047] More specifically, in this embodiment, the one-way valve 12 can be an umbrella valve.

[0048] Furthermore, please continue to refer to Figure 8 and Figure 9 The communication control device 10 also includes a float 13 and a float valve 14 connected to the float 13, with the float valve 14 disposed inside the connecting cylinder 11. When the float 13 rises to a set height, the float valve 14 closes the connecting cylinder 11 to isolate the negative pressure generating system from the interior of the tank.

[0049] With the float ball 13 and float valve plate 14 in place, when the liquid level in the tank rises, the float ball 13 will float due to buoyancy. When it reaches the set height, the float valve plate 14 will cut off the connection between the negative pressure generating system and the inside of the tank, that is, cut off the flow path of the airflow, so as to prevent the negative pressure generating system from sucking in liquid.

[0050] Further, in this embodiment, the connecting cylinder 11 includes a one-way valve fixing cylinder 111 and a buffer cylinder 112 connected to the one-way valve fixing cylinder 111. The one-way valve 12 is fixed inside the one-way valve fixing cylinder 111. One end of the buffer cylinder 112 away from the one-way valve fixing cylinder 111 is used to connect to the end cap of the tank body to form a buffer space inside the buffer cylinder 112. A guide plate 113 is provided at the bottom of the buffer cylinder 112, and a guide cylinder 114 is provided on the guide plate 113. A first guide rod 131 is formed on the float 13, and a float valve plate 14 is provided at the end of the first guide rod 131. The first guide rod 131 is movably disposed inside the guide cylinder 114 along its own axis. The size of the float valve plate 14 is larger than the size of the top opening of the guide cylinder 114, so that when the float 13 falls, the float valve plate 14 is supported on the top of the guide cylinder 114 and closes the top opening of the guide cylinder 114.

[0051] Furthermore, a second guide rod 132 is provided on the float 13. One end of the second guide rod 132 is connected to the float valve plate 14, and the other end extends into the one-way valve fixing cylinder 111 to further guide the float 13 during its ascent.

[0052] The size of the bottom opening of the one-way valve fixing cylinder 111 is smaller than the size of the float valve plate 14, so that when the float 13 rises to the set height, the float valve plate 14 is supported on the bottom opening of the one-way valve fixing cylinder 111 and the bottom opening of the one-way valve fixing cylinder 111 is closed.

[0053] After the vacuum pump 30 is started, the one-way valve 12 opens due to the negative pressure. At this time, the buffer space is also under negative pressure. The negative pressure in the buffer space will cause the float 13 to move slightly upward to form a gap between the float valve plate 14 and the top of the guide cylinder 114. At this time, the airflow will enter the filter device 20 through the gap between the float valve plate 14 and the top of the guide cylinder 114 and the one-way valve 12.

[0054] When the vacuum pump 30 is turned off, the one-way valve 12 closes, the float 13 falls downward due to gravity, and the float valve plate 14 is supported again on the top of the guide cylinder 114. The negative pressure generation system is isolated from the inside of the tank. At the same time, the float valve plate 14 restricts the fall of the float 13.

[0055] When the liquid level in the tank rises, the float 13 will rise accordingly. The first guide rod 131 and the second guide rod 132 guide the rising process of the float 13. When the float 13 rises to the set height, the float valve plate 14 will abut against the lower end face of the one-way valve fixing cylinder 111 to seal the one-way valve fixing cylinder 111, thereby connecting the negative pressure generating system with the interior of the tank.

[0056] Furthermore, in this embodiment, a bend joint 15 is also provided at the top of the connecting cylinder 11 to facilitate the connection of the first pipeline 61. The bend joint 15 can be fixedly connected to the connecting cylinder 11 through the connector buckle 151.

[0057] In summary, in this invention, the filter device 20 can filter the airflow extracted by the vacuum pump 30 to remove impurities and water vapor from the airflow; the multi-stage filter element can effectively filter impurities and water vapor; furthermore, the connection control device 10 can ensure the sealing of the tank when the vacuum pump 30 stops, and can also prevent the liquid in the tank from being sucked into the negative pressure generation system when the liquid level in the tank is high.

[0058] This utility model also provides a waste liquid collection device, which includes the aforementioned negative pressure generating system. The connecting cylinder 11 of the aforementioned negative pressure generating system can be fixedly installed on the cover plate of the waste liquid collection tank 40 of the waste liquid collection device. For other technical features of this waste liquid collection device, please refer to the prior art, which will not be repeated here.

[0059] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model's technical solution. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model's technical solution shall still fall within the scope of the present utility model's technical solution.

Claims

1. A negative pressure generating system, characterized in that: The system includes a connection control device, a filter device, and a vacuum pump. The connection control device controls the connection and disconnection between the negative pressure generating system and the tank. The filter device is located between the connection control device and the vacuum pump and is used to filter the airflow extracted by the vacuum pump. The filter device includes a housing, an air inlet, an air outlet, a first-stage filter element, and a second-stage filter element. The air inlet and the air outlet are located on the housing. The air inlet is connected to the connection control device, and the air outlet is connected to the vacuum pump. An airflow channel is formed inside the housing for airflow. The first-stage filter element and the second-stage filter element are sequentially arranged in the airflow channel along the airflow direction.

2. The negative pressure generating system according to claim 1, characterized in that: The housing includes a first receiving shell, a second receiving shell, and a filter element fixing shell. The first receiving shell and the second receiving shell are detachably combined into one unit to form a receiving space. The filter element fixing shell is fixed in the receiving space, and the first-stage filter element and the second-stage filter element are disposed in the filter element fixing shell.

3. The negative pressure generating system according to claim 2, characterized in that: The filter element fixing shell includes a first accommodating portion and a second accommodating portion connected to the first accommodating portion, wherein the first-stage filter element is disposed in the first accommodating portion and the second-stage filter element is disposed in the second accommodating portion.

4. The negative pressure generating system according to claim 3, characterized in that: A filter element screen is provided at the end of the first accommodating portion away from the second accommodating portion to fix the first-stage filter element, and a fixing structure is provided in the second accommodating portion to fix the second-stage filter element.

5. The negative pressure generating system according to claim 3, characterized in that: The air inlet and the air outlet are located on the same side of the housing.

6. The negative pressure generating system according to claim 1, characterized in that: The communication control device includes a connecting cylinder and a one-way valve. One end of the connecting cylinder is connected to the tank body, and the other end is connected to the filter device. The one-way valve is located inside the connecting cylinder and is configured to open when negative pressure is generated by the vacuum pump and close when the negative pressure disappears.

7. The negative pressure generating system according to claim 6, characterized in that: The communication control device also includes a float and a float valve plate connected to the float. The float valve plate is disposed inside the connecting cylinder. When the float rises to a set height, the float valve plate closes the connecting cylinder to isolate the negative pressure generating system from the inside of the tank.

8. The negative pressure generating system according to claim 7, characterized in that: The connecting cylinder includes a one-way valve fixing cylinder and a buffer cylinder connected to the one-way valve fixing cylinder. The one-way valve is fixed inside the one-way valve fixing cylinder. The end of the buffer cylinder away from the one-way valve fixing cylinder is used to connect to the tank body. A guide plate is provided at the bottom of the buffer cylinder, and a guide cylinder is provided on the guide plate. A first guide rod is formed on the float. A float valve plate is provided at the end of the first guide rod. The first guide rod is movably disposed inside the guide cylinder along its own axis. The size of the float valve plate is larger than the size of the top opening of the guide cylinder, so that when the float falls, the float valve plate supports the top of the guide cylinder and closes the top opening of the guide cylinder.

9. The negative pressure generating system according to claim 8, characterized in that: The float is provided with a second guide rod. One end of the second guide rod is connected to the float valve plate, and the other end extends into the one-way valve fixing cylinder. The size of the bottom opening of the one-way valve fixing cylinder is smaller than the size of the float valve plate, so that when the float rises to a set height, the float valve plate is supported on the bottom opening of the one-way valve fixing cylinder and the bottom opening of the one-way valve fixing cylinder is closed.

10. A waste liquid collection device, characterized in that: Includes the negative pressure generating system according to any one of claims 1 to 9.

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