A new gas spring structure

Abstract

The utility model belongs to vacuum pump technical field especially relates to a new air town structure, can effectively prevent the liquefaction of condensable gas, is applicable to medical negative pressure suction system and so on high requirement scene. The air town structure includes air town structure ontology, filter cotton and metal powder metallurgy block. Air town structure ontology is equipped with air inlet, air outlet and internal passage, and the air outlet is connected with the vacuum pump import end, and the air inlet end is sequentially provided with filter cotton and metal powder metallurgy block. Its simple structure, easy to manufacture and maintain, prevent the liquefaction of condensable gas through double filtration, ensure the stable operation of pump, and have the advantages such as small volume, low cost, corrosion resistance, can significantly improve the precision and service life of vacuum pump.

Description

Technical Field

[0001] This utility model relates to a novel gas ballast structure, belonging to the field of vacuum pump technology, and particularly to a gas ballast structure for preventing the liquefaction of condensable gases. Background Technology

[0002] Vacuum pumps typically contain a mixture of condensable gases and other gases in their working fluid. During the pump's compression phase, this mixture decreases in volume and increases in pressure. If the partial pressure of the condensable gas reaches its saturated vapor pressure, it will liquefy and mix into the working fluid. This not only affects the purity and lubrication properties of the working fluid but also leads to internal corrosion and reduced efficiency within the pump body. Medical negative pressure suction systems have extremely high requirements for the stability and contamination-free operation of vacuum pumps; therefore, effectively preventing the liquefaction of condensable gases has become an important research direction in this field.

[0003] Currently, the commonly used solutions in the industry include the following: 1. Traditional gas ballast structure: This method involves setting up a gas ballast chamber inside the pump body and introducing dry air to dilute condensable gases and reduce their partial pressure. The disadvantage of this method is that the gas ballast structure is relatively large, increasing the overall size of the pump body and maintenance costs.

[0004] 2. Heating method: Heating the pump body or the gas to raise its temperature and prevent liquefaction. This method consumes a lot of energy, and uneven heating may lead to localized overheating or decreased efficiency.

[0005] 3. Adsorbent method: Adsorbents are used to adsorb condensable gases, but the adsorbents need to be replaced regularly, resulting in high maintenance costs and the potential introduction of secondary pollution.

[0006] In summary, traditional gas ballasts are bulky and have high maintenance costs; heating methods are energy-intensive and suffer from uneven heating; and adsorbent methods require frequent maintenance and may introduce secondary pollution. These drawbacks limit the application of existing technologies in demanding scenarios such as medical negative pressure suction. Utility Model Content

[0007] This invention overcomes the shortcomings of existing technologies and provides a novel gas ballast structure that is small in size, easy to maintain, and has low maintenance costs. It solves the problem of internal corrosion and damage to the pump body caused by the liquefaction of condensable gases, and is made of corrosion-resistant materials, making it suitable for a variety of working gases.

[0008] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a novel gas ballast structure, comprising a gas ballast structure body, filter cotton, and metal powder metallurgy block. The gas ballast structure body includes an air inlet, an air outlet, and an internal channel. The internal channel connects the air inlet and the air outlet. The air outlet is connected to the inlet end of a vacuum pump. The air inlet end of the gas ballast structure body is provided with filter cotton and metal powder metallurgy block arranged sequentially from the outside to the inside.

[0009] Furthermore, the structure of the gas ballast structure body is as follows: a gas ballast shell and an end cap. The gas ballast shell is a cylindrical structure, and the end cap is a through-axis structure. The end cap is matched and disposed at the air inlet end of the gas ballast shell. The filter cotton is filled inside the end cap, and the metal powder metallurgy block is disposed inside the gas ballast shell.

[0010] Furthermore, a connecting pipe is fitted into the outlet end of the gas ballast shell. One end of the connecting pipe is inserted and fixed inside the outlet end of the gas ballast shell, and the other end of the connecting pipe is connected to the inlet end of the vacuum pump. The metal powder metallurgy block is disposed inside the connecting pipe located inside the gas ballast shell.

[0011] Furthermore, the outlet end of the gas ballast shell is a narrow-mouth structure, and the connecting pipe is a flexible pipe. The connecting pipe is squeezed into the narrow-mouth structure of the gas ballast shell to prevent the connecting pipe from falling off.

[0012] Furthermore, the end cap inserted into the gas ballast housing has a narrow opening structure, which facilitates the replacement of the filter cotton and prevents the filter cotton from being sucked into the gas ballast housing.

[0013] Furthermore, the end cap and the gas ballast housing are connected together by threads.

[0014] Furthermore, the gas ballast structure body is made of a corrosion-resistant material.

[0015] The gas ballast structure of this utility model includes an air inlet, an air outlet, and an internal channel, which is the main frame of the entire gas ballast structure. It is used to guide the gas from the air inlet through the internal channel to the air outlet and is connected to the inlet end of the vacuum pump.

[0016] The filter cotton of this utility model is set at the air inlet end of the gas ballast structure body to filter impurities in the air entering the gas ballast structure, prevent metal powder metallurgy blocks from being blocked, and ensure that the gas entering the gas ballast structure is relatively pure. It is a part that is regularly maintained and is filled in the end cover.

[0017] The metal powder metallurgy block of this utility model is a porous, high-density stainless steel sintered part located at the air inlet end of the gas ballast structure body, inside the filter cotton. It has a certain air permeability and can introduce dry gas to break the liquefaction conditions of condensable gas, thereby protecting the pump body and maintaining the stability of the vacuum system. It is set inside the gas ballast shell and located inside the connecting pipeline.

[0018] The connecting pipe of this utility model has one end inserted into the gas outlet end of the gas ballast shell and the other end connected to the inlet end of the vacuum pump. It is used to connect the gas outlet of the gas ballast structure body to the inlet end of the vacuum pump, so that the gas treated by the gas ballast structure can smoothly enter the vacuum pump. It is a flexible tube that is squeezed into the narrow opening structure of the gas ballast shell to prevent the connecting pipe from falling off.

[0019] The outer shell of this utility model is a cylindrical structure, which constitutes the main body of the gas ballast structure. It has an internal channel for accommodating metal powder metallurgy blocks and connecting pipes and other components. Its gas outlet end has a narrow opening structure to facilitate the installation and fixing of connecting pipes.

[0020] The end cap of this utility model has a through-axis structure and is matched and installed at the air inlet end of the gas ballast housing. It is used to seal the air inlet end of the gas ballast housing and at the same time provide filling space for filter cotton. The end of the end that is inserted into the gas ballast housing has a narrow opening structure, which facilitates the replacement of filter cotton and prevents filter cotton from being sucked into the gas ballast housing. The end cap and the gas ballast housing are connected together by threads, which facilitates disassembly and maintenance.

[0021] Compared with the prior art, the advantages of this utility model are: the gas ballast structure of this utility model is simple, easy to manufacture and maintain, and through the dual filtration of filter cotton and metal powder metallurgy block, it effectively prevents the liquefaction of condensable gas and ensures the stable operation of the pump. This utility model is small in size, low in cost, and corrosion resistant, and is suitable for high-requirement scenarios such as medical negative pressure suction. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] Figure 1 This is a cross-sectional structural diagram of the present invention.

[0024] Figure 2 This is a schematic diagram of the exploded structure of this utility model.

[0025] Figure 3 This is a three-dimensional structural diagram of the present invention.

[0026] In the diagram: 1 is the main body of the gas ballast structure, 11 is the outer shell of the gas ballast, 12 is the end cap, 2 is the filter cotton, 3 is the metal powder metallurgy block, and 4 is the connecting pipeline. Detailed Implementation

[0027] The present invention will be further described below with reference to specific embodiments.

[0028] like Figure 1 , Figure 2 and Figure 3 As shown, this embodiment illustrates the application of a gas ballast structure in a vacuum pump within a medical negative pressure suction system.

[0029] In hospital operating rooms, medical negative pressure suction systems are used to promptly remove blood, tissue debris, and other contaminants generated during surgery, maintaining a clear surgical field and ensuring the smooth progress of the procedure. The core component of this system is the vacuum pump, whose stable operation and pollution-free operation are crucial. Since the gases generated during surgery may contain condensable gases, if these gases liquefy and mix into the working fluid of the vacuum pump, it can lead to internal corrosion of the pump body, reduced efficiency, and even compromise surgical safety.

[0030] In this embodiment, a suitable location is selected to install the gas ballast structure body 1 at the inlet end of the vacuum pump. The gas outlet of the gas ballast structure body 1 is tightly connected to the inlet end of the vacuum pump via a connecting pipe 4. The connecting pipe 4 is a flexible tube, which is squeezed into the narrow opening structure of the gas ballast shell 11 to ensure a firm connection and prevent it from falling off.

[0031] The gas ballast housing 11 has a cylindrical structure, and the end cap 12 has a through-axis structure. The end cap 12 is installed at the air inlet end of the gas ballast housing 11, and the two are connected together by threads, which facilitates disassembly and maintenance.

[0032] The end cap 12 is filled with a filter cotton 2 made of high-density fiber material to filter impurities in the air entering the gas ballast structure and prevent the metal powder metallurgy block from being blocked.

[0033] A porous, high-density stainless steel sintered metal powder metallurgy block 3 is placed inside the gas ballast shell 11, located inside the connecting pipe 4, to ensure that the drying gas can pass smoothly and enter the vacuum pump.

[0034] When the vacuum pump is started, relatively dry outside gas enters through the air inlet of the gas ballast structure. It first passes through filter cotton 2, which filters out dust, particles and other impurities from the air.

[0035] The filtered dry gas continues to pass through the metal powder metallurgy block 3. The porous structure of the metal powder metallurgy block 3 ensures that the gas is evenly distributed and enters the inlet of the vacuum pump with a stable airflow.

[0036] These dry gases mix with the relatively moist, condensable working gas in the pump fluid inside the vacuum pump. The introduction of the dry gas breaks the liquefaction conditions of the condensable gas, thus preventing the condensable gas from liquefying and mixing into the working fluid.

[0037] During the surgery in this embodiment, the vacuum pump operated stably, without any issues such as pump corrosion or efficiency reduction due to liquefaction of condensable gases. The medical negative pressure suction system worked efficiently and stably, promptly removing surgical waste and ensuring the smooth progress of the surgery.

[0038] In this embodiment, the working fluid of the vacuum pump remains pure, providing excellent lubrication and extending the pump's service life. Furthermore, because the gas ballast structure is externally located within the vacuum pump, it is small in size, low in cost, and easy to maintain, saving the hospital both cost and effort in equipment maintenance.

[0039] This embodiment effectively solves the problem caused by the liquefaction of condensable gases by applying this novel gas ballast structure to a medical negative pressure suction system, improves the stability and reliability of the vacuum pump, and provides strong protection for the safety and reliability of the medical environment.

[0040] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A novel gas spring structure, characterized by, The gas ballast structure includes a gas ballast body (1), a filter cotton (2), and a metal powder metallurgy block (3). The gas ballast body (1) includes an air inlet, an air outlet, and an internal channel. The internal channel connects the air inlet and the air outlet. The air outlet is connected to the inlet of a vacuum pump. The air inlet end of the gas ballast body (1) is provided with a filter cotton (2) and a metal powder metallurgy block (3) from the outside to the inside.

2. A novel gas suspension structure according to claim 1, characterized in that, The structure of the gas ballast structure body (1) is as follows: gas ballast shell (11) and end cap (12). The gas ballast shell (11) is a cylindrical structure, and the end cap (12) is an axial through structure. The end cap (12) is matched and set at the air inlet end of the gas ballast shell (11). The filter cotton (2) is filled in the end cap (12), and the metal powder metallurgy block (3) is set in the gas ballast shell (11).

3. A novel gas suspension structure according to claim 2, characterized in that, The gas ballast housing (11) has a connecting pipe (4) installed at the outlet end. One end of the connecting pipe (4) is inserted and fixed inside the outlet end of the gas ballast housing (11), and the other end of the connecting pipe (4) is connected to the inlet end of the vacuum pump. The metal powder metallurgy block (3) is located inside the connecting pipe (4) inside the gas ballast housing (11).

4. A novel gas suspension structure according to claim 3, characterized in that, The gas ballast shell (11) has a narrow-mouth structure at the outlet end, and the connecting pipe (4) is a flexible pipe. The connecting pipe (4) is squeezed into the narrow-mouth structure of the gas ballast shell (11) to prevent the connecting pipe (4) from falling off.

5. A novel gas suspension structure according to claim 4, characterized in that, The end cap (12) inserted into the gas ballast housing (11) has a narrow opening structure, which facilitates the replacement of the filter cotton (2) and prevents the filter cotton (2) from being sucked into the gas ballast housing (11).

6. A novel gas suspension structure according to claim 5, characterized in that, The end cap (12) and the gas ballast housing (11) are connected together by threads.

7. A novel gas suspension structure according to claim 1, characterized in that, The gas ballast structure body (1) is made of corrosion-resistant material.

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