Long-life non-contact pump

Abstract

This invention relates to a non-contact pump that includes a pump cylinder having a predetermined pumping space, an inlet valve and an outlet valve located in a part of the pump cylinder to prevent backflow of the fluid and allow the fluid to flow in and out, a bellows that is provided in the pumping space of the pump cylinder and changes the volume of the pumping space so that the fluid flowing in / out along the inlet and outlet can be pumped, and a reciprocating drive unit that is provided on the outside of the cylinder cover and drives a piston reciprocally along a connected reciprocating rod. This relates to a long-life non-contact pump that maintains airtightness through pumping operation without friction between parts, prevents the generation of foreign matter in the fluid due to friction, and aims to improve the replacement life of consumables.

Description

[Technical field]

[0001] The present invention relates to a non-contact pump, and more particularly to a long-life non-contact pump that maintains airtightness through pumping without friction between parts, prevents the generation of foreign matter in fluid due to friction, improves the replacement life of consumables and reduces replacement costs, increases the operating rate of equipment, and makes it easier to replace consumables compared to conventional pumps, and is expected to be applicable to various industrial fields. [Background technology]

[0002] Generally, as shown in FIG. 1, a piston reciprocating pump includes an inlet where liquid flows into the pump, an inlet valve 1 for preventing backflow of the liquid at the inlet, an outlet where liquid can be discharged from the pump, an outlet valve 2 for preventing backflow of the liquid at the outlet, a pump cylinder 3 for forming a space in the pump into which liquid can be put, a piston 4 for expanding and contracting the space so that liquid can enter and leave the pump cylinder 3, a sealing member 5 for sealing between the pump cylinder 3 and the piston 4 to prevent the liquid from leaking out, a sealing guide 6, a liquid injection tube 7 for injecting liquid to reduce wear of the sealing member 5, and a pumping driver 8 for allowing the piston 4 to reciprocate.

[0003] When the volume inside the pump cylinder 3 increases, the liquid enters the pump through the inlet valve 1, and when the volume inside the pump cylinder 3 decreases, the liquid is discharged outside the pump through the outlet valve 2.

[0004] In the case of the existing reciprocating piston pump, the material used for sealing is worn down due to the reciprocating motion and friction between the piston 4 and the pump cylinder 3, and must be replaced with a consumable item after a certain number of operations.

[0005] Therefore, as the production capacity of the equipment is improved and the number of operations increases, the replacement cycle of related consumables is getting shorter and shorter. Depending on the production capacity of the equipment, there are some production lines where the consumables are replaced once every 1 to 2 weeks.

[0006] In other words, in a structure such as a reciprocating piston pump in which the space between the pump cylinder 3 and the piston 4 is sealed to prevent liquid from leaking out and the piston 4 reciprocates while friction is generated by the sealing member 5, the surface where the piston 4 and the sealing member 5 rub against each other must be made smoother, or a material with less friction and wear must be selected for the sealing member 5, thereby extending the replacement cycle of consumables.

[0007] However, depending on the processing of the contact surface and the way the sealing member 5 is modified, there is a limit to how much the life of consumables can be extended by several times in a structure that performs material friction operation.

[0008] In addition, as the replacement period becomes shorter, the equipment operation is stopped and the period during which workers must replace consumables becomes shorter, resulting in losses for the manufacturing company, such as increased consumable costs, downtime of the equipment, and labor costs.

[0009] Furthermore, when disassembling the machine for replacing consumables, there are many parts that need to be replaced and repaired, such as the injection of lubricant into the sealing member 5, the sealing guide 6, and the liquid injection tube 7. In the assembly of the sealing member 5 and the sealing guide 6, if the sealing member 5 is damaged or not properly assembled, it is difficult to replace or maintain the machine, depending on the worker's level of skill.

[0010] In particular, Korean Patent Publication No. 10-1449047 uses a resin material for the bellows and includes an incompressible indirect medium made of a liquid such as oil to maintain pressure within the bellows in order to prevent the bellows from being significantly deformed by external pressure.

[0011] That is, in a structure for pumping a small amount of fluid, when using a resin-based fluid, deformation occurs when the fluid is compressed, and in order to compensate for this, a non-compressible medium must be filled for 48 hours.

[0012] In addition, since a complex structure is required to apply an incompressible indirect medium inside the bellows, the manufacturing cost is increased, and the product price is also increased.

[0013] In addition, piston reciprocating pumps have the disadvantage that foreign matter may be generated due to friction of the sealing material during reciprocating motion, and the foreign matter may flow into the fluid. In addition, the structure is unreasonable for pumping liquids such as medical liquids or chemical fluids whose purity must be maintained.

[0014] Therefore, as the productivity of existing battery manufacturing processes improves, the replacement cycle of consumables for related equipment is becoming shorter, and the period during which equipment operation must be stopped to replace consumables is becoming shorter, creating a need for products that can address this. Summary of the Invention [Problem to be solved by the invention]

[0015] In order to solve the above problems, the present invention proposes a pump structure using bellows, which maintains airtightness during pumping without friction between parts, prevents the generation of foreign matter in the fluid due to friction, improves the replacement life of consumables, reduces replacement costs, increases the equipment operating rate, and makes it easier to replace consumables compared to conventional pumps, and has an object to provide a long-life non-contact pump which can be expected to be effective in various industrial fields. [Means for solving the problem]

[0016] In order to achieve the above-mentioned object, the present invention provides a pump cylinder having a predetermined pumping space in which the inflowing fluid is accommodated, the pump cylinder including an outlet valve provided on the outlet side to prevent backflow of the discharged fluid when the fluid flows in along the inlet, and an inlet valve provided on the inlet side to prevent the fluid from flowing in when the fluid is discharged along the outlet, and a pump valve provided in the pumping space of the pump cylinder to pump the fluid flowing in and out along the inlet and outlet. a piston that terminates one end of the bellows and moves together with the bellows; a reciprocating rod that is integrally connected to the piston, extends outside the pump cylinder, and reciprocates together with the movement of the piston to expand and contract the bellows; a cylinder cover that terminates a part of the pump cylinder, fixes the other end of the bellows, and through which the reciprocating rod passes; and a reciprocating drive unit that is provided on the outside of the cylinder cover and drives the piston reciprocally along the connected reciprocating rod.

[0017] Here, the bellows includes a first bellows tube made of rubber, which can be expanded or contracted to change its volume and has a vacuum space therein, and a second bellows tube made of a metal sheet and formed on the outside of the first bellows tube to maintain rigidity during repeated volume changes of the first bellows tube.

[0018] The cylinder cover may further include a vacuum line for forming a vacuum in a vacuum space formed inside the bellows.

[0019] In addition, the drain hole of the cylinder cover may further include a leak sensor coupled to the drain hole for detecting fluid entering the vacuum space when the bellows is broken, so that the fluid entering the vacuum space can be checked from the outside and the intruding fluid can be removed.

[0020] The pump cylinder may further include a temperature sensor at any one location thereof for detecting a temperature of a fluid flowing into / discharged from the pumping space by pumping of the bellows.

[0021] The pump cylinder may further include a pressure sensor at any one location thereof for detecting a pressure of a fluid flowing into / discharging from the pumping space by pumping of the bellows. Effect of the Invention

[0022] By providing the present invention configured as described above, the following effects can be expected.

[0023] First, the structure has been improved to perform pumping by using metal bellows to perform contraction and expansion without friction of parts that maintain airtightness, which has the effect of improving the replacement life of consumables so that the replacement period of consumables of existing products can be changed every few months instead of once a week or every few weeks.

[0024] Secondly, it will complement the short replacement cycle of consumables currently available, resolve inconveniences, reduce loss costs due to replacement of consumables, and increase the operating rate of equipment.

[0025] Third, compared to existing pumps, the number of replacements required is smaller, the replacement method is simple, and replacement can be easily carried out.

[0026] Fourth, in addition to battery manufacturing, the technology can be easily applied to various industrial fields such as semiconductors, displays, and chemicals. [Brief description of the drawings]

[0027] [Figure 1] FIG. 1 is a diagram showing the configuration of an existing reciprocating piston pump. [Diagram 2] FIG. 1 is a diagram showing the configuration of a long-life non-contact pump according to the present invention. [Diagram 3]FIG. 2 is an operating state diagram showing a long-life non-contact pump according to the present invention. [Figure 4] FIG. 2 is an operating state diagram showing a long-life non-contact pump according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0028] The specific aspects and technical features of the present invention will be more apparent from the following specific contents and embodiments, which are related to the accompanying drawings. In this specification, when referring to components in each drawing, it should be noted that the same components are given the same reference numerals as much as possible, even if they are displayed in different drawings.

[0029] In addition, in describing the embodiments of the present invention, if it is determined that a detailed description of related known configurations or functions may make the gist of the present invention unclear, the detailed description will be omitted.

[0030] Furthermore, in describing the components of the present invention, the terms are used only to distinguish the components from other components, and are not intended to limit the essence, order, or sequence of the components. When a component is described as being "coupled," "bonded," or "connected" to another component, it should be understood that the component may be directly coupled or connected to the other component, but that other components may also be "coupled," "bonded," or "connected" between each of the components.

[0031] The following describes the embodiments of the present invention in detail with reference to the accompanying drawings.

[0032] As shown in Figures 2 to 4, the long-life non-contact pump of the present invention may include a pump cylinder 100 that injects fluid (electrolyte or battery fluid) into a battery, a bellows 200 that is provided inside the pump cylinder 100 and performs pumping through expansion and contraction, a reciprocating drive unit 400 that pumps the bellows 200, and a cylinder cover 300 that connects the pump cylinder 100 and the bellows 200 to prevent leakage of battery fluid.

[0033] The pump cylinder 100 has a predetermined pumping space 101 in which a fluid is contained, and is formed on both sides with an inlet 103 having an inlet valve 110 that allows the fluid to flow in but prevents the fluid from flowing back, and an outlet 105 having an outlet valve 120 that allows the fluid to flow out but prevents the fluid from flowing back.

[0034] In other words, the pump cylinder 100 flows in and out of the fluid through pumping action along the inlet 103 and outlet 105 formed on both sides, but includes an outlet valve 120 on the outlet 105 side when the fluid flows in along the inlet 103 to prevent the discharged fluid from flowing back, and an inlet valve 110 on the inlet 103 side to prevent the fluid from flowing in when the fluid is discharged along the outlet 105, and is desirably a cylinder having a predetermined pumping space 101 in which the flowed in fluid is accommodated.

[0035] The bellows 200 is provided in the pumping space 101 of the pump cylinder 100 and can vary the volume of the pumping space 101 so as to pump the fluid flowing in / out through the inlet 103 and the outlet 105.

[0036] That is, the bellows 200 is made of rubber, and constitutes a first bellows tube 200a having a vacuum space 201 therein, the first bellows tube 200a being made of rubber and capable of freely adjusting its volume by expansion and contraction. The bellows tube 200 also includes a second bellows tube 200b made of a thin metal plate and formed on the outside of the first bellows tube 200a so as to maintain the rigidity of the first bellows tube 200a against repeated volume adjustments.

[0037] Although the second bellows tube 200b is made of metal, if it is possible to replace it with a material that is elastic and has airtight properties like the first bellows tube 200a, the bellows 200 can be formed using only the second bellows tube 200b.

[0038] At this time, the second bellows pipe 200b, which uses a metal sheet welded bellows to allow sufficient volumetric variation of the pumping space 101 and minimize stress due to repeated operations, can enhance the effects of sufficient fluid volume and repeated operation life.

[0039] In this case, it is preferable that the bellows 200 includes a second bellows tube 200b that is extendable and contractible into the pumping space 101, a piston 410 that terminates one end of the second bellows tube 200b, and a fixing flange 210 that terminates the other end of the second bellows tube 200b and is fixed to the inside of the cylinder cover 300.

[0040] That is, the piston 410 terminates one end of the bellows 200 and is movable together with the bellows 200 .

[0041] A reciprocating rod 420 is integrally connected to the piston 410 and extends outside the pump cylinder 100, and reciprocates with the movement of the piston 410 to cause the bellows 200 to expand and contract.

[0042] The cylinder cover 300 terminates a part of the pump cylinder 100, fixes the other end of the bellows 200, and may be configured so that the reciprocating rod 420 passes through it.

[0043] At this time, it is preferable that the cylinder cover 300 further includes a vacuum line 310 for forming a vacuum in the vacuum space 201 formed inside the bellows 200 .

[0044] The reciprocating drive unit 400 is provided on the outside of the cylinder cover 300 and can reciprocate the piston 410 along the connected reciprocating rod 420 .

[0045] A reciprocating rod 420 is connected between the piston 410 of the bellows 200 and the reciprocating drive unit 400, and one end of the rod is fixed to the piston 410 of the bellows 200, thereby enabling the bellows 200 to be expanded and contracted.

[0046] The reciprocating drive unit 400 is coupled to the outside of the cylinder cover 300 and is connected to a reciprocating rod 420 to drive the piston 410 to reciprocate.

[0047] In addition, a temperature sensor 130 for sensing the temperature of the fluid flowing into / out of the pumping space 101 is also included at one location of the pump cylinder 100 .

[0048] Finally, the pump cylinder 100 also includes a pressure sensor 140 at one location that senses the pressure of the fluid entering / exhausting the pumping space 101 .

[0049] That is, an inlet 103 through which fluid flows into the pumping space 101 of the pump cylinder 100 and an inlet valve 110 for preventing backflow of the fluid are provided on one side of the inlet 103, and an outlet 105 through which fluid can be discharged from the pumping space 101 of the pump cylinder 100 and an outlet valve 120 for preventing backflow of the fluid are provided on one side of the outlet 105, so that the fluid can be continuously pumped to the battery.

[0050] A bellows 200 is provided which can expand and contract to allow fluid to enter and exit the pumping space 101 of the pump cylinder 100, and a vacuum line 310 is formed which connects the inside of the bellows 200 to the outside of the cylinder cover 300 via a hole of a certain size to form a vacuum in the vacuum space 201 of the bellows 200.

[0051] In addition, a rod guide 220 may be further provided in the center of the cylinder cover 300, which is connected to the reciprocating rod 420 by a bushing and guides the precise reciprocation of the reciprocating rod 420 during the pumping operation of the bellows 200.

[0052] Here, a reciprocating rod 420 is fixed to the piston 410 of the bellows 200 and driven to reciprocate in response to the contraction and expansion of the bellows 200, and a rod guide 220 for guiding the reciprocating rod 420 so that it reciprocates precisely is provided in the center of the cylinder cover 300.

[0053] Therefore, a leak sensor 330 may be provided to sense fluid leaking into the vacuum space 201 of the bellows 200 when the bellows 200 reaches the end of its life and is broken.

[0054] Here, the leak sensor 330 may be provided in the drain hole 320 of the cylinder cover 300 to close the drain hole 320 that discharges fluid entering the vacuum space 201 when the bellows 200 is broken, and to remove the fluid from the vacuum space 201 based on a sensing signal from the leak sensor 330.

[0055] In addition, when the temperature of the fluid being pumped changes, the discharged volume changes due to the change in density of the fluid, so the temperature sensor 130 can sense the temperature of the fluid and send an alarm or correct the volume change.

[0056] The pressure sensor 140 measures and manages the pressure of the internal fluid of the pump cylinder 100 when the fluid is sucked in and discharged, and can manage optimal pumping conditions when the fluid is sucked in and discharged.

[0057] A cylinder cover 300 that connects the bellows 200, the rod guide 220, and the reciprocating drive unit 400, and a sealing member 240 that is assembled between the pump cylinder 100, the bellows 200, and the cylinder cover 300 for airtightness may be proposed.

[0058] Here, the sealing member 240 also includes a first sealing 241 provided between the pump cylinder 100 and the fixed flange 210, a second sealing 243 provided between the fixed flange 210 and the cylinder cover 300, and a third sealing 245 provided between the cylinder cover 300 and the reciprocating rod 420.

[0059] In the case of the long-life non-contact pump of the present invention configured as described above, the structure and connection relationship will be described as follows.

[0060] First, the pumping space 101 between the pump cylinder 100 and the bellows 200 is filled with fluid.

[0061] Thus, fluid may enter the interior of the pump cylinder 100 through the inlet valve 110 and be discharged through the outlet valve 120, where the fluid may be pumped by the bellows 200.

[0062] Here, it is preferable that the inlet valve 110 and the outlet valve 120 each have a built-in check valve to prevent backflow of the fluid.

[0063] A sealing member 240 is provided between the pump cylinder 100 and the bellows 200 and between the pump cylinder 100 and the cylinder cover 300 to keep the joints airtight and prevent fluid leakage.

[0064] A vacuum line 310 is connected to the vacuum space 201 of the bellows 200 to constantly maintain a constant vacuum state. When the reciprocating rod 420 is in the forward position during operation of the reciprocating drive unit 400, the piston 410 is positioned to the side of the inlet valve 110 and the outlet valve 120.

[0065] At this time, when the piston 410 of the bellows 200 is in the maximum forward state, the bellows 200 is maximally extended, and the pumping space 101 of the pump cylinder 100 has a minimum volume.

[0066] On the other hand, before the fluid flows in, in the standby state, when the reciprocating rod 420 moves backward by the drive of the reciprocating drive unit 400, the piston 410 of the bellows 200 begins to move backward in the direction away from the inlet valve 110 and the outlet valve 120, opening the inlet valve 110 and allowing the fluid to flow into the pump cylinder 100.

[0067] When the reverse movement is completed, the inlet valve 110 closes, and the piston 410 of the bellows 200 is moved backward to the maximum extent, and the pumping space 101 of the pump cylinder 100 forms the maximum volume space with the bellows 200 being minimally contracted.

[0068] In addition, when the fluid inflow operation is completed and before the fluid is discharged, in the standby state, when the reciprocating rod 420 is moved forward by the reciprocating drive unit 400, the piston 410 of the bellows 200 moves toward the inlet valve 110 and the outlet valve 120, and when the forward operation begins, the outlet valve 120 is opened and the fluid is discharged from the pumping space 101 of the pump cylinder 100 through the outlet valve 120.

[0069] At this time, when the forward movement is completed, the pump outlet valve 120 maintains the closed state, and returns to the closed state after the fluid is completely discharged.

[0070] The long-life non-contact pump of the present invention can pump the fluid by repeatedly performing reciprocating motion between a standby state before discharging a fluid and a standby state before inflowing the fluid, by the operation of the reciprocating drive unit 400.

[0071] In the case of the vacuum space 201 of the bellows 200, by maintaining the vacuum state, a leak sensor 330, one side of which is sealed, is provided at the bottom of the cylinder cover 300.

[0072] In addition, as the bellows 200 undergoes repeated variable expansion and contraction movements, fatigue may accumulate in the metal plates of the bellows 200 .

[0073] In this case, if fatigue accumulates in the metal plates of the bellows 200 and reaches the end of its life, gaps will appear where the metal plates are welded or where fatigue has accumulated, and even if fluid leaks into the pumping space 101 of the pump cylinder 100, which is in a vacuum state, once gaps begin to appear in the metal plates of the bellows 200 and a small amount of fluid begins to leak, the fluid will begin to fill the lower part of the vacuum space 201 of the bellows 200, and the leaked fluid will fill the drain hole 320.

[0074] On the other hand, if the drain hole 320 is filled with fluid, the leak sensor 330 checks for any gaps in the bellows 200 and sends an alarm to the equipment, preventing damage to the equipment due to damage to the bellows 200 and informing the user when it is time to replace expendable items.

[0075] The fixed amount of fluid discharged can be determined by the change in volume of the pumping space 101 of the pump cylinder 100 when the bellows 200 is in the forward and backward positions.

[0076] It can be seen that the density of the fluid changes due to a change in the temperature of the fluid, and the discharge weight changes based on the same volume. If the weight of the volume of the fluid whose density has changed due to a change in temperature conditions is corrected or an alarm setting function for temperature changes is provided, the quality of the product can be improved.

[0077] In addition, the pump cylinder 100 includes a temperature sensor 130 for measuring the temperature of the fluid in the pumping space 101, and can measure the temperature of the fluid being filled, calculate the amount of change in volume due to a change in temperature, and compensate and control the amount of reciprocating movement of the bellows 200, thereby detecting temperature changes in the equipment and identifying dangerous situations.

[0078] The pressure sensor 140 measures and manages the pressure of the internal fluid of the pump cylinder 100 when the fluid is sucked in and discharged, and can manage optimal pumping conditions when the fluid is sucked in and discharged.

[0079] In other words, it is possible to check whether the suction / discharge pressure is constant during each discharge, whether the amount of fluid flowing into the pump is constant, and whether the inlet check valve 110 and outlet check valve 120, which act to prevent backflow at the inlet 103 and outlet 105 through which the fluid is sucked in and discharged, are operating properly.

[0080] Therefore, by maintaining a constant pressure each time the pump is inhaled or discharged, a precise amount of fluid can be pumped; if the inhalation and discharge pressures change, the amount of fluid being inhaled or discharged may be altered or an inspection of the inlet 103 and outlet 105 check valves may be indicated.

[0081] In the case of the long-life non-contact pump of the present invention, the fluid pumping action for supplying fluid to the battery is developed in a structure that can apply bellows 200 to prevent wear due to contact and friction, which is a problem in the life of existing pumps, and the life of consumables can be extended to a long life.

[0082] Therefore, the design life of the bellows 200 is several million times, which is a remarkable improvement of the lifespan by more than 10 times compared to the existing product, and the production capacity of the production line that injects fluid into the battery can be extended by 6 to 12 months compared to the existing product.

[0083] Therefore, in order to minimize deformation of bellows 200 when bellows 200 is in an expanded or stationary state, a vacuum is applied inside, and when the pressure in vacuum space 201 of bellows 200 is the same as the external pressure, when bellows 200 is installed horizontally, it is possible to minimize the warping of the center of bellows 200 due to its own weight and the shaking of bellows 200 due to the reciprocating motion of bellows 200.

[0084] Meanwhile, by maintaining a vacuum condition in the vacuum space 201 of the bellows 200, the bellows 200 can minimize deformation due to a pressure difference with the outside, improve the accuracy of the inflow / outflow of fluid through its shape, and control a more stable pumping amount.

[0085] Furthermore, even if the bellows 200 is damaged and fluid leaks into the interior, the leak sensor 330 can prevent damage caused by the load of the equipment body.

[0086] Therefore, by applying the bellows 200 to the long-life non-contact pump of the present invention, the pumping structure is dramatically improved, and the structure performs pumping action of contraction and expansion using the bellows 200 without friction of parts that maintain airtightness, so the replacement cycle of consumables can be improved from hundreds of thousands of times to millions of times compared to the conventional system, and the replacement cycle of consumables that currently must be replaced every week or several weeks can be improved by several months or more.

[0087] Furthermore, when replacing consumables, it is only necessary to replace one bellows 200 or a small number of parts, making the replacement process relatively simple compared to existing methods; the number of parts to be replaced is small, and the replacement method is simple compared to existing pumps; operators can easily become familiar with the replacement method and replace consumables in a short time.

[0088] In the long-life non-contact pump of the present invention, when a gap begins to form in the metal plate of the bellows 200 and a small amount of fluid begins to leak, the leakage is immediately detected by the leak sensor 330, and it is possible to know when to replace the pump before the fluid leaks outside the pump, which has a great advantage in that it is possible to prevent equipment contamination and safety accidents such as fires.

[0089] In addition, the fluid can be applied to various industrial fields such as semiconductors, displays, chemicals, and pharmaceutical companies through pumping in addition to the fluid injection process for automobiles, and the material of the bellows 200 can be made of non-metallic resin and special materials to suit the characteristics of each fluid.

[0090] By providing the present invention configured as described above, in the manufacturing process, a product with a longer replacement cycle for consumables is required, but there is no suitable product, so a piston-operated pump can be applied, and the replacement cycle for consumables can be dramatically extended by utilizing a different conceptual structure other than the contact-type airtightness that is a disadvantage of piston pumps.

[0091] First, it is characterized by a structure that uses bellows to perform pumping action of contraction and expansion without friction of parts that maintain airtightness during pumping action, and the number of pumping times can be increased from hundreds of thousands to millions, so the replacement cycle of consumables can be further extended compared to the existing system.

[0092] Secondly, the replacement cycle of consumables can be changed from once every few weeks to once every few months.

[0093] Thirdly, it can complement the short replacement cycle of consumables, resolve inconveniences, dramatically reduce the loss costs caused by the replacement of consumables for manufacturers, and increase the uptime of equipment.

[0094] Fourth, when replacing consumables, only one bellows or a small number of parts need to be replaced, making the replacement process easier than with existing methods; the number of parts to be replaced is small, and the replacement method is simpler than with existing pumps. Operators can easily become familiar with the replacement method and can replace consumables in a short time.

[0095] The terms and words used in the above-described specification and claims should not be interpreted in a limited manner to their general or dictionary meanings, but should be interpreted in a manner that corresponds to the technical idea of ​​the present invention, based on the principle that the inventor can appropriately define the concept of the term in order to best describe his / her invention.

[0096] Therefore, it should be understood that the configurations illustrated in the drawings and embodiments described in this specification are merely the most preferred embodiment of the present invention and do not represent the technical ideas of the present invention, and that there may be various equivalents and modifications that can replace them at the time of this application. [Industrial Applicability]

[0097] Pumping fluids using the long-life non-contact pump can be applied to various industrial fields such as semiconductors, displays, chemicals, pharmaceuticals, food, and cosmetics through pumping, in addition to the battery fluid injection process in the battery manufacturing process, and can be expected to be effective. The bellows material can be made of non-metallic resins and special materials to suit the characteristics of each fluid.

Claims

1. a pump cylinder (100) having a predetermined pumping space (101) for receiving the inflowing fluid, the pump cylinder including an inlet (103) and an outlet (105) formed on both sides thereof, an outlet valve (120) provided on the outlet (105) side for preventing backflow of the discharged fluid when the fluid flows in along the inlet (103), and an inlet valve (110) provided on the inlet (103) side for preventing the inflow of the fluid when the fluid is discharged along the outlet (105); a bellows (200) provided in the pumping space (101) of the pump cylinder (100) for varying the volume of the pumping space (101) so as to pump the fluid flowing in / out through the inlet (103) and the outlet (105); a piston (410) that terminates one end of the bellows (200) and floats together with the bellows (200); a reciprocating rod (420) that is integrally connected to the piston (410), extends outside the pump cylinder (100), and reciprocates with the movement of the piston (410) to expand and contract the bellows (200); a cylinder cover (300) that terminates a part of the pump cylinder (100), fixes the other end of the bellows (200), and through which the reciprocating rod (420) passes; a reciprocating drive unit (400) that is provided on the outside of the cylinder cover (300) and drives the piston (410) to reciprocate along a reciprocating rod (420) connected thereto, A long-life non-contact pump, characterized in that a vacuum space (201) is formed inside the bellows (200), and this vacuum space (201) is maintained by evacuating the inside of the bellows (200) through a vacuum line (310) formed in the cylinder cover (300).

2. The bellows (200) A first bellows tube (200a) made of rubber, capable of varying its volume by expansion and contraction, and having a vacuum space (201) therein; 2. The long-life non-contact pump according to claim 1, further comprising: a second bellows tube (200b) made of a metal sheet and formed on the outside of the first bellows tube (200a) so as to maintain the rigidity of the first bellows tube (200a) against repeated volume changes.

3. The cylinder cover (300) is formed with a drain hole (320) for discharging fluid that has entered the vacuum space (201), 2. The long-life non-contact pump as claimed in claim 1, further comprising a leak sensor (330) coupled to the drain hole (320) for detecting fluid entering the vacuum space (201) when the bellows (200) is broken, so that the fluid entering the vacuum space (201) can be confirmed from the outside and the invading fluid can be removed.

4. At any one of the pump cylinders (100), 2. The long-life non-contact pump according to claim 1, further comprising a temperature sensor (130) for sensing the temperature of the fluid flowing into / discharging from the pumping space (101) by pumping of the bellows (200).

5. At any one of the pump cylinders (100), 2. The long-life non-contact pump according to claim 1, further comprising a pressure sensor (140) for sensing the pressure of the fluid flowing into / discharging from the pumping space (101) by pumping the bellows (200).

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