Vacuum infusion liquid level control method and vacuum infusion device thereof

Abstract

The invention discloses a vacuum infusion liquid level control method and a vacuum infusion device thereof, and the method comprises the steps: 1, placing a capacitor to be infused into a vacuum main body, and enabling a liquid outlet pipe of an auxiliary tank body to be communicated with the capacitor; 2, the vacuum main body and the auxiliary tank body are vacuumized through a vacuum pump, so that the vacuum main body and the auxiliary tank body have the same negative pressure; 3, the height of the auxiliary tank body is adjusted, so that the upper end face of the overflow pipe is flush with the planned perfusion liquid level; 4, liquid to be poured is injected into the auxiliary tank body; step 5, filling until the liquid level in the capacitor is flush with the upper end face of the overflow pipe, wherein the liquid level does not change any more to form balance; and 6, closing the valve of the liquid outlet pipe to complete vacuum infusion. According to the vacuum infusion liquid level control method and the vacuum infusion device thereof, the auxiliary tank body with the same negative pressure as the vacuum main body is arranged, the upper end face of the overflow pipe is adjusted to be flush with the planned infusion liquid level face, the vacuum environment metering problem is solved, and the infusion consistency of batch products is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of capacitors, and more particularly to a vacuum infusion liquid level control method and a vacuum infusion device thereof. Background Art

[0002] When manufacturing capacitors, insulating oil needs to be poured into them. Capacitors generate heat during operation. Insulating oil has good thermal conductivity. It can absorb the heat generated by the capacitor and transfer the heat to prevent the capacitor from degrading or even being damaged due to overheating. Insulating oil can also stabilize the electric field distribution inside the capacitor and reduce the concentration of the electric field. This is because the dielectric constant of insulating oil is relatively stable, which enables the capacitor to maintain good performance under different working conditions.

[0003] In order to improve the insulation performance, the insulating oil needs to be poured openly in a vacuum environment to effectively remove the air inside the capacitor. The dielectric constant of air is low and it is easily ionized under high voltage, resulting in partial discharge, which may damage the capacitor. These problems can be avoided by vacuum pouring insulating oil to ensure good insulation effect.

[0004] Since the pouring is carried out in a vacuum environment, the pouring metering is difficult and it is difficult to ensure the consistency of the insulating oil liquid level of batch capacitors. Summary of the invention

[0005] An object of the present invention is to solve at least the above problems and / or disadvantages and to provide at least the advantages which will be described hereinafter.

[0006] In order to achieve these purposes and other advantages of the present invention, a vacuum perfusion liquid level control method is provided, the method comprising: Step 1: Place the capacitor to be filled into the vacuum body, and connect the liquid outlet pipe of the auxiliary tank to the capacitor; Step 2: Close the sealing door of the vacuum main body, and use the vacuum pump to evacuate the vacuum main body and the auxiliary tank so that both have the same negative pressure; Step 3: Adjust the height of the auxiliary tank through the lifting mechanism so that the upper end surface of the overflow pipe is flush with the planned filling liquid level; Step 4: Inject the liquid to be filled into the auxiliary tank body, and the liquid flows into the capacitor through the liquid outlet pipe, so that the auxiliary tank body is flush with the liquid level line of the capacitor; Step 5: Pour until the liquid level in the capacitor is flush with the upper end surface of the overflow pipe, and when the flow rates of the liquid inlet pipe and the overflow pipe of the auxiliary tank are equal, the liquid level no longer changes and forms a balance; Step 6: Close the valve of the liquid outlet pipe to complete the vacuum infusion.

[0007] Preferably, in step 2, the method for closing the sealing door of the vacuum body comprises: S1. Move the sealing door close to the vacuum main door frame; S2. Input compressed air into the area enclosed by the U-shaped sealing groove of the sealing door and the sealing ring through the air supply pipe, so that the two sides of the sealing ring are in close contact with the two sides of the U-shaped sealing groove, and the sealing ring is pushed to move and be in close contact with the vacuum main door frame; S3. Start the vacuum pump to evacuate the vacuum body, form negative pressure in the vacuum body, make the sealing door fit tightly against the vacuum body, and complete the closing of the sealing door.

[0008] A vacuum infusion device comprises a vacuum main body capable of placing at least one capacitor, and further comprises: an auxiliary tank body for containing a liquid to be infused; A lifting mechanism for controlling the height of the auxiliary tank space; Wherein, the auxiliary tank is connected to the vacuum main body through a vacuum tube, and one end of the vacuum tube is connected to a vacuum pump; The lower part of the auxiliary tank is provided with a liquid outlet pipe connected to the capacitor in the vacuum main body; The auxiliary tank body is provided with a liquid inlet pipe and an overflow pipe connected to an external liquid reservoir; The diameter of the overflow pipe is larger than the diameter of the liquid inlet pipe; The overflow pipe is placed vertically in the auxiliary tank body, and the upper opening end surface of the overflow pipe is horizontal and higher than the height of the liquid outlet pipe; The auxiliary tank body side wall is provided with an observation window at a height matching the opening of the upper end of the overflow pipe; The liquid outlet pipe is provided with at least one valve.

[0009] Preferably, the opening at the upper end of the overflow pipe is configured to be funnel-shaped.

[0010] Preferably, the vacuum body is provided with a sealing door; A U-shaped sealing groove is provided at the contact portion between the sealing door and the vacuum body, and a sealing ring is provided in the sealing groove; The sealing ring is configured as a hemispherical shape on the side close to the vacuum body, and an arc-shaped groove is provided on the side close to the sealing door, and its two ends are closely attached to the inner wall of the U-shaped sealing groove; The surfaces on both sides of the U-shaped sealing groove are configured as smooth surfaces, and the bottom surface of the U-shaped sealing groove is provided with an air supply pipe for inputting compressed air into the area enclosed by the U-shaped sealing groove and the sealing ring; The other end of the air delivery pipe is provided with an air compressor or an air storage tank communicated therewith.

[0011] Preferably, the overflow pipe, the liquid inlet pipe, the vacuum pipe and the liquid outlet pipe are all configured with pipe sections containing anti-negative pressure hoses; The anti-negative pressure hose comprises: a sealing hose, a spiral anti-compression strip embedded on the outside of the sealing hose, a corrugated tube sleeved on the outside of the sealing hose, and a connecting strip arranged between the spiral anti-compression strip and the corrugated tube; Wherein, the two sides of the connecting strip are respectively connected to the outer side of the spiral compression strip and the inner side of the corrugated pipe.

[0012] Preferably, the connecting strip is configured in a spiral shape; The pitch of the connecting strip is much greater than the pitch of the spiral compression-resistant strip.

[0013] The present invention includes at least the following beneficial effects: by setting an auxiliary tank body with the same negative pressure as the vacuum main body, and raising and lowering it, adjusting it until the upper end surface of its overflow pipe is flush with the planned filling liquid level surface, connecting the auxiliary tank body with the capacitor in the vacuum main body through the liquid outlet pipe for filling, while ensuring the filling speed, the metering difficulty problem in a vacuum environment is solved, the consistency of the filling amount of batch products is ensured, and a new method for liquid level control of vacuum filling is provided.

[0014] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of a vacuum perfusion device in one embodiment of the present invention; Figure 2 for Figure 1 The cross-sectional view at the mark A in the figure; Figure 3 It is a cross-sectional view of an anti-negative pressure hose in one embodiment of the present invention.

[0016] Markings in the figure: 1. Vacuum body, 11. Sealing door, 111. U-shaped sealing groove, 112. Sealing ring, 113. Gas pipe, 12. Capacitor, 2. Auxiliary tank, 21. Overflow pipe, 22. Liquid inlet pipe, 23. Liquid outlet pipe, 24. Observation window, 3. Lifting mechanism, 4. Infusion pump, 5. Vacuum pump, 51. Vacuum tube, 6. Valve, 7. Anti-negative pressure hose, 71. Sealing hose, 72. Spiral anti-pressure strip, 73. Connecting strip, 74. Bellows, 8. Motor. DETAILED DESCRIPTION

[0017] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0018] It should be understood that terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0019] It should be noted that in the description of the present invention, the orientation or positional relationship indicated by the term is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or an indirect connection through an intermediate medium. It can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] Figure 1 The embodiment of a vacuum infusion device according to the present invention is shown, which comprises: a vacuum main body 1 capable of placing at least one capacitor 12, and also comprises: an auxiliary tank 2 for containing liquid to be infused; A lifting mechanism 3 for controlling the spatial height of the auxiliary tank 2; The auxiliary tank 2 is connected to the vacuum main body 1 through a vacuum tube 51, and one end of the vacuum tube 51 is connected to a vacuum pump 5; The lower part of the auxiliary tank body 2 is provided with a liquid outlet pipe 23 connected to the capacitor 12 in the vacuum body 1; The auxiliary tank body 2 is provided with a liquid inlet pipe 22 and an overflow pipe 21 which are connected to the external liquid reservoir; The diameter of the overflow pipe 21 is larger than the diameter of the liquid inlet pipe 22; The overflow pipe 21 is placed vertically in the auxiliary tank 2, and the upper opening end surface of the overflow pipe 21 is horizontal and higher than the liquid outlet pipe 23; The side wall of the auxiliary tank body 2 is provided with an observation window 24 at a height matching the opening of the upper end of the overflow pipe 21; At least one valve 6 is disposed on the liquid outlet pipe 23 .

[0022] Vacuum infusion level control methods include: Step 1: Place the capacitor 12 to be filled into the vacuum body 1, and connect the liquid outlet pipe 23 of the auxiliary tank 2 to the capacitor 12; Step 2: Close the sealing door 11 of the vacuum main body 1, and evacuate the vacuum main body 1 and the auxiliary tank body 2 through the vacuum pump 5 so that the two have the same negative pressure; Step 3: Adjust the height of the auxiliary tank 2 by means of the lifting mechanism 3 so that the upper end surface of the overflow pipe 21 is flush with the planned filling liquid level; Step 4: inject the liquid to be filled into the auxiliary tank body 2, and the liquid flows into the capacitor 12 through the liquid outlet pipe 23, so that the liquid level line of the auxiliary tank body 2 is flush with that of the capacitor 12; Step 5: Pour until the liquid level in the capacitor 12 is flush with the upper end surface of the overflow pipe 21, and when the flow rates of the liquid inlet pipe 22 of the auxiliary tank 2 and the overflow pipe 21 are equal, the liquid level no longer changes and forms a balance; Step 6: Close the valve 6 of the liquid outlet pipe 23 to complete the vacuum perfusion.

[0023] Since the vacuum main body 1 and the auxiliary tank body 2 have the same negative pressure, there is no pressure difference and transportation resistance when the liquid to be injected is transported. When the liquid enters the auxiliary tank body 2, since the liquid outlet pipe 23 is thicker than the liquid inlet pipe 22, it can be ensured that when the liquid is initially injected, the liquid will not stay in the auxiliary tank but will be completely injected into each product; when the liquid in the product is injected to the required liquid level one after another, under the influence of gravity, the product liquid level will form a balance with the overflow port liquid level. At this time, even if the flow rate of the liquid to be injected into the tank remains unchanged, since the liquid inlet pipe 22 and the overflow pipe 21 are both connected to the liquid reservoir through the infusion pump 4, and the overflow pipe 21 has a thicker diameter, the excess liquid whose liquid level exceeds the upper end surface of the overflow pipe 21 will directly flow into the opening of the overflow pipe 21 and be transported back to the liquid reservoir through the infusion pump 4, instead of continuing to inject liquid into the product to form a new higher liquid level, thereby realizing liquid level control under vacuum conditions.

[0024] A lifting mechanism 3 is provided to vertically move the auxiliary tank body 2. The motor 8 of the lifting mechanism 3 controls the rotation of the screw rod, thereby controlling the auxiliary tank body 2 to move up and down, and adjusting the upper opening of the overflow pipe 21 to be consistent with the liquid level height of the capacitor 12 to be filled in the vacuum body 1. Since the auxiliary tank body 2 has the same vacuum negative pressure as the vacuum body 1, the filling liquid level height of the product to be filled can be controlled by adjusting the opening position height of the overflow pipe 21, and thereby the liquid level of the product to be filled in the entire vacuum body 1 can be controlled without being restricted by the internal volume of the capacitor 12, thereby ensuring the consistency of the filling liquid level of the capacitors 12 of the same batch.

[0025] The opening at the upper end of the overflow pipe 21 is configured to be funnel-shaped, which can improve the stability of the device and avoid changes in the liquid level caused by excess liquid not flowing into the overflow pipe 21 in time.

[0026] Generally, the sealing door 11 has a large area and a high thickness, and is difficult to manufacture and move. The overall flatness of the sealing part is difficult to ensure. When closing the door, there are a few parts where the sealing ring 112 cannot contact the vacuum body 1, resulting in the problem that the vacuum negative pressure inside the vacuum body 1 cannot meet the technical requirements. Therefore, in general, in order to ensure that the sealing ring 112 of various parts of the sealing door 11 is in contact with the vacuum body 1, it is necessary to set a plurality of hydraulic cylinders along the laying position of the sealing ring 112 of the sealing door 11 to push the sealing door 11, so that the sealing door 11 is deformed, and various parts of the sealing ring 112 are in contact with the vacuum body 1 to complete the sealing. The equipment and operation are relatively complicated, the cost is high, and the energy consumption is high.

[0027] like Figure 1-2 As shown, the vacuum body 1 is provided with a sealing door 11; a U-shaped sealing groove 111 is provided at the contact portion between the sealing door 11 and the vacuum body 1, and a sealing ring 112 is provided in the sealing groove; the sealing ring 112 is configured as a hemispherical shape on the side close to the vacuum body 1, and is configured as a side close to the vacuum body 1 with an arc-shaped groove in the middle and both ends close to the inner wall of the U-shaped sealing groove 111; the surfaces on both sides of the U-shaped sealing groove 111 are configured as smooth surfaces, and its bottom surface is provided with an air pipe 113 connected to the air compressor.

[0028] The method for closing the sealing door 11 of the vacuum body 1 comprises: S1, moving the sealing door 11 close to the door frame of the vacuum body 1; S2. Compressed air is input into the area enclosed by the U-shaped sealing groove 111 and the sealing ring 112 of the sealing door 11 through the air delivery pipe 113, so that the two sides of the sealing ring 112 are in close contact with the two sides of the U-shaped sealing groove 111, and the sealing ring 112 is pushed to move and be in close contact with the door frame of the vacuum body 1; S3 , starting the vacuum pump 5 to evacuate the vacuum body 1 , forming a negative pressure in the vacuum body 1 , so that the sealing door 11 is closely attached to the vacuum body 1 , and the sealing door 11 is closed.

[0029] In actual use, the sealing door 11 of the vacuum body 1 is opened and closed mainly by being lifted and lowered by the motor 8 due to its large size.

[0030] The sealing part of the sealing door 11 ensures that both sides of the U-shaped sealing groove 111 are smooth and easy to process. The frame around the sealing door 11 is provided with a U-shaped sealing groove 111 with smooth sides. The bottom of the groove is provided with an air pipe 113 or an air hole connected with the air pipe 113 to deliver compressed air. The sealing ring 112 is designed to be round at the top and double-winged at the tail. After being placed in the U-shaped sealing groove 111, the double wings are closely attached to both sides of the U-shaped sealing groove 111. When the heavy-load sealing door 11 moves to the door frame of the vacuum main body 1, it is in contact with the vacuum main body. 1 The door frame naturally forms an uneven gap. At this time, compressed air can be input into the area enclosed by the U-shaped sealing groove 111 and the sealing ring 112 to make the two sides of the sealing ring 112 close to the two sides of the U-shaped sealing groove 111, and push the sealing ring 112 to move and close to the door frame of the vacuum body 1; start the vacuum pump 5 to evacuate the vacuum body 1, form a negative pressure in the vacuum body 1, and under the action of the vacuum negative pressure, make the sealing door 11 close to the vacuum body 1, complete the closing and final sealing of the sealing door 11.

[0031] The method of opening the sealing door 11 of the vacuum body 1 is opposite to the steps and manner of the closing method.

[0032] When the sealing door 11 is closed, regardless of whether the sealing ring 112 contacts the vacuum body 1 at this time, just start the air compressor and input compressed air (the compressed air pressure is 0.6-1.0MPa) into the area enclosed by the U-shaped sealing groove 111 and the sealing ring 112 through the air pipe 113 to push the sealing ring 112 to move toward the side of the vacuum body 1 until the hemispherical heads of various parts of the sealing ring 112 are in close contact with the vacuum body 1. The hemispherical head on one side of the sealing ring 112 is in close contact with the vacuum body 1, and the two ends of the arc groove on the other side are in close contact with the inner wall of the U-shaped sealing groove 111, so as to achieve an overall reliable full-sealed structure.

[0033] By redesigning the structure of the sealing ring 112, during use, the compressed air is pressurized to ensure that all parts of the sealing ring 112 are in contact with the vacuum main body 1, thereby achieving reliable sealing of the vacuum main body 1. This avoids the problem that the sealing ring 112 cannot contact with the vacuum main body 1 to complete the sealing at a small part after the door is closed due to the large and heavy sealing door 11, and the flatness of the sealing part is difficult to ensure, resulting in the vacuum negative pressure inside the vacuum main body 1 not meeting the technical requirements. The structure is simple and the operation is easy.

[0034] like Figure 3 As shown, the overflow pipe 21, the liquid inlet pipe 22, the vacuum pipe 51 and the liquid outlet pipe 23 are all configured with a pipe section containing an anti-negative pressure hose 7; The anti-negative pressure hose 7 comprises: a sealing hose 71, a spiral anti-compression strip 72 embedded on the outside of the sealing hose 71, a corrugated tube 74 sleeved on the outside of the sealing hose 71, and a connecting strip 73 arranged between the spiral anti-compression strip 72 and the corrugated tube 74; wherein the two sides of the connecting strip 73 are respectively connected to the outside of the spiral anti-compression strip 72 and the inside of the corrugated tube 74. The connecting strip 73 is configured as a spiral shape opposite to the spiral direction of the spiral anti-compression strip 72; the pitch of the connecting strip 73 is much larger than the pitch of the spiral anti-compression strip 72.

[0035] The sealing hose 71 is arranged at the innermost side to ensure the seal inside the pipeline; the spiral anti-compression strip 72 is arranged to support the pipeline to prevent the inner side of the pipeline from being deformed inward and damaged due to negative pressure; the bellows 74 is arranged to protect the inner pipe fittings to prevent them from being worn, which can effectively prevent the sealing hose 71 from being damaged and aging, thereby extending the service life; the spiral connecting strip 73 is arranged to prevent the spiral anti-compression strip 72 and the bellows 74 from relative displacement during use, and connecting the spiral anti-compression strip 72 and the bellows 74 can enhance the pipeline's ability to resist negative pressure, and the connecting strip 73 forms a spiral connecting line on the surface of the spiral anti-compression strip 72, which ensures the bending characteristics of the spiral anti-compression strip 72 while enhancing the overall connection strength of the spiral anti-compression strip 72 to avoid damage.

[0036] The present invention arranges an auxiliary tank body 2 having the same negative pressure as the vacuum main body 1, and raises and lowers it to adjust the upper end surface of the overflow pipe 21 thereof to be flush with the planned filling liquid level surface for filling. While ensuring the filling speed, the problem of difficult metering in a vacuum environment is solved, and the consistency of the filling liquid level of batch products is ensured. The structure is simple, reliable and easy to promote.

[0037] The above solution is only an illustration of a preferred embodiment, but is not limited thereto. When implementing the present invention, appropriate replacement and / or modification can be performed according to user needs.

[0038] The number of devices and processing scales described here are used to simplify the description of the present invention. Applications, modifications and variations of the present invention will be obvious to those skilled in the art.

[0039] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and the embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily realized. Therefore, without departing from the general concept defined by the claims and equivalent scope, the present invention is not limited to the specific details and the illustrations shown and described here.

Claims

1. A vacuum perfusion liquid level control method, characterized in that: The method comprises: Step 1: Place the capacitor to be filled into the vacuum body, and connect the liquid outlet pipe of the auxiliary tank to the capacitor; Step 2: Close the sealing door of the vacuum main body, and use the vacuum pump to evacuate the vacuum main body and the auxiliary tank so that both have the same negative pressure; Step 3: Adjust the height of the auxiliary tank through the lifting mechanism so that the upper end surface of the overflow pipe is flush with the planned filling liquid level; Step 4: Inject the liquid to be filled into the auxiliary tank body, and the liquid flows into the capacitor through the liquid outlet pipe, so that the auxiliary tank body is flush with the liquid level line of the capacitor; Step 5: Pour until the liquid level in the capacitor is flush with the upper end surface of the overflow pipe, and when the flow rates of the liquid inlet pipe and the overflow pipe of the auxiliary tank are equal, the liquid level no longer changes and forms a balance; Step 6: Close the valve of the liquid outlet pipe to complete the vacuum infusion.

2. The vacuum perfusion liquid level control method according to claim 1, characterized in that: In step 2, the method of closing the sealing door of the vacuum body includes: S1. Move the sealing door close to the vacuum main door frame; S2. Input compressed air into the area enclosed by the U-shaped sealing groove of the sealing door and the sealing ring through the air supply pipe, so that the two sides of the sealing ring are in close contact with the two sides of the U-shaped sealing groove, and the sealing ring is pushed to move and be in close contact with the vacuum main door frame; S3. Start the vacuum pump to evacuate the vacuum body, forming a negative pressure in the vacuum body. Under the action of the negative pressure in the vacuum body, the sealing door is tightly attached to the vacuum body, completing the closing of the sealing door and the final sealing.

3. A vacuum infusion device, which is used in the vacuum infusion liquid level control method according to claim 1, comprising a vacuum body in which at least one capacitor can be placed, characterized in that: Also includes: Auxiliary tank for holding the liquid to be poured; A lifting mechanism for controlling the height of the auxiliary tank space; Wherein, the auxiliary tank is connected to the vacuum main body through a vacuum tube, and one end of the vacuum tube is connected to a vacuum pump; The lower part of the auxiliary tank is provided with a liquid outlet pipe connected to the capacitor in the vacuum main body; The auxiliary tank body is provided with a liquid inlet pipe and an overflow pipe connected to an external liquid reservoir; The diameter of the overflow pipe is larger than the diameter of the liquid inlet pipe; The overflow pipe is placed vertically in the auxiliary tank body, and the upper opening end surface of the overflow pipe is horizontal and higher than the height of the liquid outlet pipe; The auxiliary tank body side wall is provided with an observation window at a height matching the opening of the upper end of the overflow pipe; The liquid outlet pipe is provided with at least one valve.

4. The vacuum infusion device according to claim 3, characterized in that: The opening at the upper end of the overflow pipe is configured in a funnel shape.

5. The vacuum infusion device according to claim 3, characterized in that: The vacuum body is provided with a sealing door; A U-shaped sealing groove is provided at the contact portion between the sealing door and the vacuum body, and a sealing ring is provided in the sealing groove; The sealing ring is configured as a hemispherical shape on the side close to the vacuum body, and an arc-shaped groove is provided on the side close to the sealing door, and its two ends are closely attached to the inner wall of the U-shaped sealing groove; The surfaces on both sides of the U-shaped sealing groove are configured as smooth surfaces, and the bottom surface of the U-shaped sealing groove is provided with an air supply pipe for inputting compressed air into the area enclosed by the U-shaped sealing groove and the sealing ring; The other end of the air delivery pipe is provided with an air compressor or an air storage tank communicated therewith.

6. The vacuum infusion device according to claim 3, characterized in that: The overflow pipe, liquid inlet pipe, vacuum pipe and liquid outlet pipe are all configured with pipe sections containing anti-negative pressure hoses; The anti-negative pressure hose comprises: a sealing hose, a spiral anti-compression strip embedded on the outside of the sealing hose, a corrugated tube sleeved on the outside of the sealing hose, and a connecting strip arranged between the spiral anti-compression strip and the corrugated tube; Wherein, the two sides of the connecting strip are respectively connected to the outer side of the spiral compression strip and the inner side of the corrugated pipe.

7. The vacuum infusion device according to claim 6, characterized in that: The connecting strip is configured in a spiral shape; The pitch of the connecting strip is much greater than the pitch of the spiral compression-resistant strip.

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