Pressure tank with built-in elastic filter material

Abstract

The invention provides a pressure tank with a built-in elastic filter material, which is characterized by comprising a tank body, an air bag, filter cotton and a wringing spring, and the air bag is arranged in the tank body. And the filter cotton is filled between the tank body and the air bag. The water squeezing spring is arranged in the filter cotton, one end of the water squeezing spring abuts against the tank body, and the other end of the water squeezing spring abuts against the air bag. When the air bag pushes the water squeezing spring to stretch out and draw back, the water squeezing spring can drive the filter cotton to be compressed or relaxed in the stretching-out and drawing-back direction of the spring. According to the design, the filter cotton does not need to depend on the elasticity of the material of the filter cotton to adapt to the change of the air bag, but elastic force is generated by the water squeezing spring, the dynamic adjustment is beneficial to keeping the tight filling state of the filter cotton, and the situation that the filter effect is influenced by excessive plastic deformation can be avoided even under continuous squeezing of the air bag.

Description

Technical Field

[0001] The present application relates to the field of environmental protection technology, and in particular to a pressure tank with built-in elastic filter material. Background Art

[0002] In the existing water treatment or air purification field, in order to improve the filtration efficiency and reduce the size of the equipment, a pressure tank with built-in elastic filter material is usually used as a filtration device. The basic structure of this type of device usually includes a tank body, an air bag is arranged in the tank body, and filter cotton filled between the tank body and the air bag. As the main filtration medium, the performance of the filter cotton directly affects the efficiency and effect of the entire filtration system.

[0003] Specifically, a typical design of a pressure tank with built-in elastic filter material is characterized in that an airbag is provided in the tank body, and filter cotton is filled between the airbag and the tank body. When the airbag contracts, the tank body is filled with liquid. When the airbag expands, water in the filter cotton is squeezed by the airbag, thereby passing through the filter cotton and being discharged from the water outlet of the pressure tank. Because the water passes through the filter cotton, it has a filtering effect.

[0004] However, in actual application, this design has a problem. When the airbag squeezes the filter cotton to discharge the water in it, the continuous squeezing will cause the filter cotton to undergo plastic deformation due to the elasticity and plasticity of the filter cotton itself. This deformation will make it impossible for the filter cotton to tightly fill the entire tank body, thereby forming gaps between the tank body and the filter cotton. These gaps will not only reduce the effective filtration area of ​​the filter cotton, but also allow unfiltered water or air to flow directly through these gaps, resulting in a significant decrease in the filtration effect. The current solution to the plastic deformation of the filter cotton is to directly replace the pressure tank. This method is not environmentally friendly and also increases the cost of using the equipment.

[0005] Therefore, how to ensure that the filter cotton is squeezed by the airbag while avoiding the impact of plastic deformation of the filter cotton due to the squeezing of the airbag, and thereby ensure that the filter cotton can always tightly fill the tank body, has become a technical problem that needs to be urgently solved in the design of this type of pressure tank with built-in elastic filter material. Summary of the invention

[0006] In view of this, it is necessary to provide a pressure tank with a built-in elastic filter material to solve the above problems.

[0007] The embodiment of the present application provides a pressure tank with a built-in elastic filter material, comprising:

[0008] Tank;

[0009] An air bag is arranged in the tank;

[0010] Filter cotton, filled between the tank body and the air bag;

[0011] A water squeezing spring is arranged in the filter cotton, one end of the water squeezing spring abuts against the tank body, and the other end of the water squeezing spring abuts against the air bag;

[0012] When the water squeezing spring is extended or retracted, the water squeezing spring drives the filter cotton to be compressed or expanded along the extension and retraction direction of the water squeezing spring.

[0013] In at least one embodiment of the present application, the tank body has a first surface and a second surface facing away from the first surface, the pressure tank with built-in elastic filter material also includes a water outlet connected to the tank body, the water outlet is located on the second surface, the airbag passes through the first surface and is connected to the outside world, and the pressure tank with built-in elastic filter material has a plurality of water squeezing springs, and the plurality of water squeezing springs are located between the first surface and the second surface.

[0014] In at least one embodiment of the present application, the water squeezing spring includes:

[0015] A spring body, one end of which is fixed to the tank body and the other end of which is in contact with the air bag;

[0016] A bellows, wherein the spring body is arranged in the bellows, and the two ends of the bellows are respectively fixed to the two ends of the spring body;

[0017] Drainage boards, a plurality of which are respectively fixed at a plurality of pipe joints of the corrugated pipe, and the drainage boards extend into the filter cotton;

[0018] The drainage plate has a first extrusion surface, the first extrusion surface is located in the filter cotton and the first extrusion surface is perpendicular to the expansion and contraction direction of the spring body.

[0019] In at least one embodiment of the present application, the drain plate includes a first plate body and two second plate bodies, the first plate body has two first extrusion surfaces, and the two first extrusion surfaces are located at two ends of the first plate body in the extension direction of the spring body;

[0020] Two second plates are symmetrically arranged on the side of the first plate away from the first surface and are respectively located on the two first extrusion surfaces. The second plate has a second extrusion surface, and the opening of the included angle a between the second extrusion surface on one second plate and the second extrusion surface on another second plate arranged on the same first plate faces away from the corrugated tube.

[0021] In at least one embodiment of the present application, the water squeezing spring further includes a fitting pad disposed at an end of the spring body away from the tank body, and the fitting pad fits with the airbag.

[0022] In at least one embodiment of the present application, the tank body is provided with supporting feet, and the supporting feet are located on the second surface.

[0023] In at least one embodiment of the present application, the pressure tank with built-in elastic filter material further includes a one-way valve, and the one-way valve is arranged between the water outlet and the tank body.

[0024] In at least one embodiment of the present application, the pressure tank with built-in elastic filter material further includes a vent provided on the tank body, the vent is communicated with the airbag and the vent is located on the first surface.

[0025] In at least one embodiment of the present application, the pressure tank with built-in elastic filter material further includes an air pump, and the air pump is disposed between the vent and the air bag.

[0026] In at least one embodiment of the present application, the pressure tank with built-in elastic filter material further includes a plurality of water inlets connected to the water outlet, the plurality of water inlets are arranged on the tank body and the plurality of water outlets are arranged around the vent.

[0027] The pressure tank with built-in elastic filter material provided above is designed with a water squeezing spring. As the airbag pushes the water squeezing spring to expand and contract, it drives the filter cotton to compress or expand along the expansion and contraction direction of the spring. This design makes the filter cotton not need to rely on the elasticity of its own material to adapt to the changes of the airbag, but the elastic force is generated by the water squeezing spring. This dynamic adjustment helps to maintain the tight filling state of the filter cotton, and even under the continuous squeezing of the airbag, it can avoid excessive plastic deformation that affects the filtering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a structural stereogram of a pressure tank with built-in elastic filter material;

[0029] Figure 2 This is a structural stereogram of a pressure tank with built-in elastic filter material;

[0030] Figure 3 It is a schematic diagram of the internal structure of the pressure tank airbag with built-in elastic filter material when it is not inflated;

[0031] Figure 4 A schematic diagram of the internal structure of a pressure tank airbag with built-in elastic filter material when it is inflated;

[0032] Figure 5 This is the structural exploded diagram of the water squeezing spring;

[0033] Figure 6 It is a schematic diagram of the structure when the water squeezing spring is arranged on the air bag and is not squeezed by the air bag;

[0034] Figure 7It is a schematic diagram of the structure when the water squeezing spring is arranged on the air bag and is squeezed by the air bag;

[0035] Figure 8 It is a three-dimensional diagram of the structure of the water squeezing spring when it is compressed;

[0036] Fig. 9 It is a schematic diagram of the structure of the water squeezing spring when it is compressed;

[0037] Fig.10 It is a structural diagram of the water squeezing spring when it is expanded.

[0038] Main component symbols

[0039] 100. Pressure tank with built-in elastic filter material; 10. Tank body; 11. Support foot; 20. Filter cotton; 30. Water squeezing spring; 31. Spring body; 32. Bellows; 321. Pipe joint; 33. Drain plate; 331. First plate body; 332. Second plate body; 333. First extrusion surface; 334. Second extrusion surface; 34. Fitting pad; 40. Water outlet; 50. Water inlet; 60. Vent; 70. Air pump; 80. One-way valve; 90. Air bag; b. First surface; c. Second surface. DETAILED DESCRIPTION

[0040] The embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0041] It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a central component at the same time. When a component is considered to be "located on" another component, it may be directly located on the other component or there may be a central component at the same time. The terms "top", "bottom", "upper", "lower", "left", "right", "front", "back", and similar expressions used herein are for illustrative purposes only.

[0042] The embodiment of the present application provides a pressure tank with a built-in elastic filter material, comprising:

[0043] Tank;

[0044] An air bag is arranged in the tank;

[0045] Filter cotton, filled between the tank body and the air bag;

[0046] A water squeezing spring is arranged in the filter cotton, one end of the water squeezing spring abuts against the tank body, and the other end of the water squeezing spring abuts against the air bag;

[0047] When the squeezing spring is extended or retracted, the squeezing spring drives the filter cotton to compress or relax along the extension direction of the squeezing spring. As the airbag pushes the squeezing spring to extend or retract, the squeezing spring drives the filter cotton to compress or relax along the extension direction of the spring. This design makes it unnecessary for the filter cotton to rely on the elasticity of its own material to adapt to the changes of the airbag, but the squeezing spring generates elastic force. This dynamic adjustment helps to maintain the tight filling state of the filter cotton, and can avoid excessive plastic deformation that affects the filtering effect even under the continuous squeezing of the airbag.

[0048] Some embodiments of the present application are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0049] See also Figure 1-Figure 10 The embodiment of the present application provides a pressure tank 100 with a built-in elastic filter material, characterized in that it includes a tank body 10, an airbag 90, filter cotton 20 and a water squeezing spring 30, and the airbag 90 is arranged in the tank body 10. The filter cotton 20 is filled between the tank body 10 and the airbag 90. The water squeezing spring 30 is arranged in the filter cotton 20, one end of the water squeezing spring 30 abuts on the tank body 10, and the other end of the water squeezing spring 30 abuts on the airbag 90. When the water squeezing spring 30 is extended or retracted, the water squeezing spring 30 drives the filter cotton 20 to compress or relax along the extension and retraction direction of the water squeezing spring 30.

[0050] Specifically, as the bearing structure of the entire filtering system, the airbag 90, the filter cotton 20 and the squeezing spring 30 are provided with installation space. The airbag 90 acts as an extrusion element in the pressure tank, and squeezes the water (or air) in the filter cotton 20 by expanding and contracting to achieve the filtering effect. The filter cotton 20, as the main filtering medium, intercepts and removes impurities in the fluid. The squeezing spring 30 is arranged in the filter cotton 20, with one end abutting on the tank body 10 and the other end abutting on the airbag 90. When the airbag 90 squeezes the filter cotton 20, the squeezing spring 30 can drive the filter cotton 20 to compress or relax along its telescopic direction, thereby avoiding plastic deformation of the filter cotton 20. Keep the filter cotton 20 tightly filled: through the elastic action of the squeezing spring 30, ensure that the filter cotton 20 always fills the tank body 10 tightly, avoid the formation of gaps, maintain the effective filtering area of ​​the filter cotton 20, ensure that the fluid is fully filtered, reduce the damage of the filter cotton 20 caused by plastic deformation, and reduce the replacement cost. When the airbag 90 expands, the squeezing spring 30 is squeezed by the airbag 90 and contracts, driving the filter cotton 20 to be compressed along the expansion and contraction direction of the squeezing spring 30. At this time, the water (or air) in the filter cotton 20 is squeezed out and discharged through the water outlet 40. When the airbag 90 contracts, the squeezing spring 30 returns to its original shape, driving the filter cotton 20 to relax, thereby restoring the filter cotton 20 to its original state and preparing for the next filtration.

[0051] In a specific example, the tank body 10 has a first surface b and a second surface c facing away from the first surface b. The pressure tank 100 with built-in elastic filter material also includes a water outlet 40 connected to the tank body 10, and the water outlet 40 is located on the second surface c. The airbag 90 passes through the first surface b and is connected to the outside. The pressure tank 100 with built-in elastic filter material has a plurality of water squeezing springs 30, and the plurality of water squeezing springs 30 are located between the first surface b and the second surface c.

[0052] Specifically, the tank body 10 has a first surface b and a second surface c facing away from the first surface b. The first surface b and the second surface c are two main surfaces of the tank body 10, which provide a basis for installation and positioning of other components (such as the airbag 90, the water outlet 40, the water squeezing spring 30, etc.). The first surface b is usually used to install components such as the airbag 90 and the vent 60, while the second surface c is used to set the water outlet 40 and possible support feet 11, etc. The water outlet 40 is a channel for the filtered liquid (such as water) to leave the tank body 10. Setting it on the second surface c can ensure that the filtered liquid can be discharged smoothly while avoiding interference with components such as the airbag 90 on the first surface b. The water outlet 40 is located on one side (the second surface c) of the tank body 10, which is convenient for connection with an external pipeline, thereby realizing the transportation and reuse of the liquid. Through the opening on the first surface b, the airbag 90 can be inflated and deflated, thereby controlling the expansion and contraction of the airbag 90. The pressure tank 100 with built-in elastic filter material has multiple squeezing springs 30, and the multiple squeezing springs 30 are located between the first surface b and the second surface c. During the expansion and contraction process, the squeezing springs 30 drive the filter cotton 20 to compress or relax along its expansion and contraction direction, thereby assisting the airbag 90 to squeeze the liquid in the filter cotton 20. The addition of the squeezing springs 30 makes the squeezing of the filter cotton 20 more uniform, reduces the occurrence of plastic deformation, and improves the filtering effect.

[0053] In a specific example, the squeezing spring 30 includes:

[0054] The spring body 31 has one end fixed to the tank body 10 and the other end abutting against the airbag 90;

[0055] A bellows 32, wherein the spring body 31 is disposed in the bellows 32, and two ends of the bellows 32 are respectively fixed to two ends of the spring body 31;

[0056] Drainage plates 33, wherein a plurality of the drainage plates 33 are respectively fixed at a plurality of pipe sections 321 of the corrugated tube 32, and the drainage plates 33 extend into the filter cotton 20;

[0057] The drainage plate 33 has a first extrusion surface 333 . The first extrusion surface 333 is located inside the filter cotton 20 and is perpendicular to the expansion and contraction direction of the spring body 31 .

[0058] Specifically, one end of the spring body 31 is fixed to the tank body 10, and the other end is in contact with the airbag 90. This design ensures that when the airbag 90 expands or contracts, the spring body 31 can expand and contract accordingly, thereby driving the compression or relaxation of the filter cotton 20. The expansion and contraction movement of the spring body 31 not only responds to the changes of the airbag 90, but also applies pressure to the filter cotton 20 through the drain plate 33 to help discharge the moisture or air therein. The bellows 32 is wrapped around the outer periphery of the spring body 31, and its two ends are respectively fixed to the two ends of the spring body 31. The design of the bellows 32 enables it to expand or contract flexibly with the expansion and contraction of the spring body 31. The drain plate 33 is fixed at multiple pipe sections 321 of the bellows 32 and extends into the filter cotton 20. This design ensures that the drain plate 33 can fit tightly on the filter cotton 20, thereby effectively draining water. The drain plate 33 has a first extrusion surface 333, which is located in the filter cotton 20 and is perpendicular to the expansion and contraction direction of the spring body 31. When the spring body 31 expands and contracts, the first extrusion surface 333 of the drainage plate 33 will compress or expand the filter cotton 20 accordingly, thereby squeezing out the water or air therein. The design of the drainage plate 33 not only improves the drainage efficiency, but also ensures that the filter cotton 20 is tightly filled and evenly stressed.

[0059] Further, the two ends of the bellows 32 are firmly fixed to the two ends of the spring body 31. This design ensures that when the spring body 31 is deformed (such as contracted), the bellows 32 can be deformed (such as contracted) synchronously. The drain plate 33 is cleverly installed at multiple pipe sections 321 of the bellows 32 and extends into the filter cotton 20. This means that any deformation of the bellows 32 will directly affect the position and state of the drain plate 33. When the bellows 32 contracts, the spacing between its various pipe sections 321 will be reduced accordingly. Since the drain plates 33 are fixed on the pipe sections 321, these drain plates 33 will also approach each other as the spacing between the pipe sections 321 is reduced. As the drain plates 33 approach each other, their squeezing effect on the filter cotton 20 will become more obvious. This enhanced squeezing not only helps to squeeze out more water or air in the filter cotton 20, but also ensures that the filter cotton 20 remains in a tightly filled state, thereby improving the filtering efficiency. During the contraction of the bellows 32, the drain plates 33 not only squeeze the filter cotton 20, but also generate a driving force toward the water outlet 40. This driving force helps to accelerate the discharge of water or air in the filter cotton 20. Since multiple drain plates 33 work simultaneously, their driving effect on the filter cotton 20 will be more significant. This synergistic effect not only improves the drainage efficiency, but also ensures that the filter cotton 20 maintains the best filtering state during the entire filtering process.

[0060] In a specific example, the drainage plate 33 includes a first plate body 331 and two second plate bodies 332, the first plate body 331 has two first extrusion surfaces 333, and the two first extrusion surfaces 333 are located at two ends of the first plate body 331 in the expansion and contraction direction of the spring body 31;

[0061] The two second plates 332 are symmetrically arranged on the side of the first plate 331 away from the first surface b and are respectively located on the two first extrusion surfaces 333. The second plate 332 has a second extrusion surface 334. The opening of the angle a between the second extrusion surface 334 on one second plate 332 and the second extrusion surface 334 on another second plate 332 arranged on the same first plate 331 is away from the bellows 32.

[0062] Specifically, the first plate body 331 of the drain plate 33 has two first extrusion surfaces 333, and the two extrusion surfaces are located at both ends of the spring body 31 in the direction of expansion and contraction. This means that when the spring body 31 expands and contracts, it will directly act on the two extrusion surfaces. The main function of the extrusion surfaces is to squeeze the liquid (such as water) between them. When the spring body 31 contracts, it pushes the two extrusion surfaces on the first plate body 331 toward each other, thereby forming an extrusion area. This extrusion area will apply pressure to the liquid located therein, forcing it to flow out. When the squeezing spring 30 contracts, it will apply pressure to the liquid through the two extrusion surfaces on the first plate body 331. The magnitude of this pressure depends on the degree of contraction of the spring body 31 and the elastic modulus of the material.

[0063] Furthermore, the main function of the second extrusion surface 334 is to press the liquid in the filter cotton 20 to between two adjacent first plates 331. When the spring body 31 contracts, it not only pushes the first extrusion surfaces 333 to approach each other, but also applies pressure to the filter cotton 20 through the second extrusion surface 334. This pressure forces the liquid in the filter cotton 20 to flow to the space between the two adjacent first plates 331, thereby achieving effective drainage. Angle a is formed between the second extrusion surfaces 334 on the two second plates 332, which are respectively located on both sides of the first plate 331 and are both connected to the first plate 331. The opening direction of angle a is away from the bellows 32, that is, the space between the two second extrusion surfaces 334 is opened in a direction away from the bellows 32. In the tank body 10, a plurality of drain plates 33 are arranged at a certain interval, and each drain plate 33 has a first plate 331 and two second plates 332. When the second plates 332 on two adjacent drain plates 33 are close to each other, an arched area is formed between them. This arched area is composed of the outer edge parts of the two second plates 332 and the space between them. Since the angle a deviates from the first surface b (i.e., the inner side of the tank body 10), this arched area has a certain depth in the vertical direction, providing space for the accumulation and discharge of liquid. When the spring body 31 is contracted by an external force, it will drive the drain plate 33 as a whole to move toward the inner side of the tank body 10. Since the second plate 332 is connected to the first plate 331, they will also move with the contraction of the spring. As the spring contracts, the arched area between adjacent drain plates 33 will change. Specifically, this arched area will shrink because the two second plates 332 will approach each other. Since the angle a deviates from the first surface b, the arched area has a certain depth in the vertical direction. When the spring contracts, this depth will decrease, thereby pressing the liquid accumulated in the arched area toward the second surface c (i.e., the outer side) of the tank body 10. Since the water outlet 40 is located on the second surface c, the liquid will eventually be discharged from the tank body 10 .

[0064] In a specific example, the squeezing spring 30 further includes a fitting pad 34 disposed at one end of the spring body 31 away from the tank body 10 , and the fitting pad 34 fits with the airbag 90 .

[0065] Specifically, the squeezing spring 30 is a complex assembly, including a spring body 31, a drain plate 33 (which may include a first plate body 331 and a second plate body 332), and other possible auxiliary components. The fitting pad 34 is located at one end of the spring body 31 away from the tank body 10. This means that this end of the spring body 31 does not directly contact the tank body 10, but is connected to another component (in this case, the air bag 90) through the fitting pad 34. The material selection of the fitting pad 34 is usually based on the fit between it and the air bag 90, wear resistance, corrosion resistance, and possible elasticity requirements. Common materials include rubber, silicone, or other polymer materials. The main function of the fitting pad 34 is to ensure a tight fit between the spring body 31 and the air bag 90. This fit helps prevent liquid or gas from leaking between them, thereby maintaining the integrity of the system. When the spring body 31 is extended and retracted, the fitting pad 34 can also play a buffering role, reduce the friction and wear between the spring and the air bag 90, and extend the service life.

[0066] In a specific example, a supporting foot 11 is disposed on the tank body 10, and the supporting foot 11 is located on the second surface c.

[0067] Specifically, the tank body 10 is the main structure that accommodates components such as the filter cotton 20, the spring, and the drain plate 33, and usually has a certain strength and sealing performance. The support foot 11 is located on the second side c of the tank body 10. The "second side c" here usually refers to the outer side or bottom of the tank body 10, which is opposite to the inner side (i.e., the first side b) of the tank body 10. The specific position of the support foot 11 may vary depending on the design, but it is usually located at the bottom of the tank body 10 to support the weight of the entire tank body 10. The material selection of the support foot 11 is usually based on its load-bearing capacity, wear resistance, corrosion resistance, and possible adjustability requirements. Common materials include metals (such as stainless steel, cast iron, etc.), plastics or rubber, etc. The main function of the support foot 11 is to support the weight of the tank body 10 and ensure that the tank body 10 can be stably placed on the ground or other supporting surfaces. This helps prevent the tank body 10 from tipping over or moving due to excessive weight or external factors (such as wind, earthquake, etc.).

[0068] In a specific example, the pressure tank 100 with built-in elastic filter material further includes a one-way valve 80 , and the one-way valve 80 is disposed between the water outlet 40 and the tank body 10 .

[0069] Specifically, the pressure tank 100 with built-in elastic filter material is a complex assembly, which usually includes a tank body 10, an elastic filter material (such as filter cotton 20), a drain plate 33, a spring, a support foot 11, etc. In addition, in order to optimize performance and function, other auxiliary components may also be included. The one-way valve 80 is arranged between the water outlet 40 and the tank body 10. This means that the water outlet 40 is not directly connected to the inside of the tank body 10, but is connected through the one-way valve 80. The one-way valve 80 is usually installed at or near the entrance of the water outlet 40 to ensure that the liquid can only flow from one direction. The material selection of the one-way valve 80 is usually based on its corrosion resistance, wear resistance, sealing and possible elasticity requirements. Common materials include rubber, plastic, metal (such as stainless steel) or composite materials. The main function of the one-way valve 80 is to control the flow direction of the liquid, ensuring that the liquid can only flow from the inside of the tank body 10 to the water outlet 40, but not in the opposite direction. This helps to prevent sewage or impurities from flowing back into the tank body 10, and keep the tank body 10 clean and filtering efficiency.

[0070] In a specific example, the pressure tank 100 with built-in elastic filter material further includes a vent 60 disposed on the tank body 10 , the vent 60 is communicated with the airbag 90 and the vent 60 is located on the first surface b.

[0071] Specifically, the vent 60 is provided on the tank body 10 and is located on the first side b. The "first side b" here generally refers to the inner side of the tank body 10 or the side facing the filter cotton 20. The specific position of the vent 60 may vary depending on the design, but it is generally located at the top or side of the tank body 10 so that the gas can smoothly enter and connect with the airbag 90. The vent 60 is connected to the airbag 90 through a pipe or other connector. This means that when the gas enters the tank body 10 through the vent 60, it can flow directly to the airbag 90 and inflate it or adjust the pressure. The main function of the vent 60 is to allow gas to enter the tank body 10 and inflate the airbag 90. This helps to maintain the expansion state of the airbag 90, thereby ensuring that it can fit tightly on the filter cotton 20 and improve the filtering efficiency.

[0072] In a specific example, the pressure tank 100 with built-in elastic filter material further includes an air pump 70 , and the air pump 70 is disposed between the vent 60 and the air bag 90 .

[0073] Specifically, the air pump 70 is arranged between the vent 60 and the airbag 90. This means that the air pump 70 is a key device connecting the vent 60 (which may be an interface outside the pressure tank for connecting to an external gas source) and the airbag 90. It is responsible for sucking in external gas through the vent 60 and sending it into the airbag 90 after compressing it. The air pump 70 is usually connected to the vent 60 and the airbag 90 through a pipe or a hose. These connectors ensure the smooth flow of gas and allow the air pump 70 to be flexibly configured and adjusted. The main function of the air pump 70 is to provide compressed gas to the airbag 90, so that it expands and fits tightly on the filter cotton 20. This helps to ensure the efficiency and stability of the filtration process.

[0074] In a specific example, the pressure tank 100 with built-in elastic filter material further includes a plurality of water inlets 50 connected to the water outlet 40 , the plurality of water inlets 50 are disposed on the tank body 10 and the plurality of water outlets 40 are disposed around the vent 60 .

[0075] Specifically, a plurality of water inlets 50 are provided on the tank body 10, and these water inlets 50 are connected with the water outlet 40, and together constitute the water flow channel of the pressure tank. The number of water inlets 50 may be determined according to the size of the tank body 10, the filtering requirements and the requirements of the water flow rate. A plurality of water outlets 40 are arranged around the vent 60. This means that the water outlets 40 are not randomly distributed on the tank body 10, but are arranged according to a certain layout rule, usually in a ring or radial distribution with the vent 60 as the center. This layout helps to ensure the uniformity and filtering efficiency of the water flow. When the water inlet 50 is arranged around, the water flow can enter the tank body 10 from multiple directions at the same time and be evenly distributed around the air bag 90. Since the water flow can flow evenly around the air bag 90, each filter unit on the elastic filter material can receive the same water flow and pressure. This helps to maintain consistency between the filter units and reduce the difference in filtering efficiency caused by uneven water flow.

[0076] The above is only an implementation method of the present application. It should be pointed out that a person skilled in the art can make improvements without departing from the inventive concept of the present application, but these improvements are within the scope of protection of the present application.

Claims

1. A pressure tank with a built-in elastic filter material, characterized in that: include: Tank; An air bag is arranged in the tank; Filter cotton, filled between the tank body and the air bag; A water squeezing spring is arranged in the filter cotton, one end of the water squeezing spring abuts against the tank body, and the other end of the water squeezing spring abuts against the air bag; When the water squeezing spring is extended or retracted, the water squeezing spring drives the filter cotton to be compressed or expanded along the extension and retraction direction of the water squeezing spring.

2. The pressure tank with built-in elastic filter material according to claim 1, characterized in that: The tank body has a first surface and a second surface facing away from the first surface. The pressure tank with built-in elastic filter material also includes a water outlet connected to the tank body, and the water outlet is located on the second surface. The airbag penetrates the first surface and is connected to the outside world. The pressure tank with built-in elastic filter material has a plurality of water squeezing springs, and the plurality of water squeezing springs are located between the first surface and the second surface.

3. The pressure tank with built-in elastic filter material according to claim 2, characterized in that: The water squeezing spring comprises: A spring body, one end of which is fixed to the tank body and the other end of which is in contact with the air bag; A bellows, wherein the spring body is arranged in the bellows, and the two ends of the bellows are respectively fixed to the two ends of the spring body; Drainage plates, wherein a plurality of the drainage plates are respectively fixed at a plurality of pipe joints of the corrugated pipe, and the drainage plates extend into the filter cotton; The drainage plate has a first extrusion surface, the first extrusion surface is located in the filter cotton and the first extrusion surface is perpendicular to the expansion and contraction direction of the spring body.

4. The pressure tank with built-in elastic filter material according to claim 3, characterized in that: The drainage plate comprises a first plate body and two second plate bodies, the first plate body is provided with two first extrusion surfaces, and the two first extrusion surfaces are located at two ends of the first plate body in the extension and contraction direction of the spring body; Two second plates are symmetrically arranged on the side of the first plate away from the first surface and are respectively located on the two first extrusion surfaces. The second plate has a second extrusion surface, and the opening of the included angle a between the second extrusion surface on one second plate and the second extrusion surface on another second plate arranged on the same first plate faces away from the corrugated tube.

5. The pressure tank with built-in elastic filter material according to claim 3, characterized in that: The water squeezing spring further comprises a fitting pad arranged at one end of the spring body away from the tank body, and the fitting pad fits with the airbag.

6. The pressure tank with built-in elastic filter material according to claim 2, characterized in that: The tank body is provided with supporting feet, and the supporting feet are located on the second surface.

7. The pressure tank with built-in elastic filter material according to claim 2, characterized in that: The pressure tank with built-in elastic filter material also includes a one-way valve, which is arranged between the water outlet and the tank body.

8. The pressure tank with built-in elastic filter material according to claim 2, characterized in that: The pressure tank with built-in elastic filter material further comprises a vent provided on the tank body, the vent is communicated with the air bag and the vent is located on the first surface.

9. The pressure tank with built-in elastic filter material according to claim 8, characterized in that: The pressure tank with built-in elastic filter material also includes an air pump, and the air pump is arranged between the vent and the air bag.

10. The pressure tank with built-in elastic filter material according to claim 8, characterized in that: The pressure tank with built-in elastic filter material also includes a plurality of water inlets communicated with the water outlets, the plurality of water inlets are arranged on the tank body, and the plurality of water outlets are arranged around the vent.

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