A pressure tank for water pump based on closed water circulation

Abstract

The utility model discloses a pressure tank for water pump based on closed water circulation relates to pressure tank technical field, including jar body, inside air bag and the end cap fixed in the open end of jar body. Air bag neck portion is connected with jar body through a integral type locking ring structure, and the open end inner wall of jar body is equipped with annular card station, and air bag neck portion is equipped with the conical annular piece with annular card groove, and the integral type locking ring is embedded between the open end of jar body and air bag neck portion, and is cooperated with the first taper surface of conical annular piece through the second taper surface of its inboard bottom. The end cap is connected with jar body through thread, and the inboard top surface is pressed tightly locking ring when screwing, so that the conical annular piece of air bag neck portion is tightly clamped between annular card station and locking ring. The device saves traditional flange bolt, realizes the quick assembly and reliable sealing of air bag, improves production efficiency and reduces the risk of leakage.

Description

Technical Field

[0001] This utility model relates to the field of pressure tank technology, specifically a pressure tank for a water pump based on closed-loop water circulation. Background Technology

[0002] In a closed-loop water circulation system, the pressure tank is a crucial auxiliary device. Its core function is to separate the water chamber from the air chamber using an internal air bladder. By compressing the pre-filled gas inside the air bladder, it absorbs system pressure fluctuations, thereby stabilizing system pressure, reducing frequent pump start-ups and shutdowns, protecting the system, and saving energy.

[0003] Currently, most airbag-type pressure tanks on the market use traditional flange bolt structures for the connection and sealing between the airbag and the tank body. During assembly, the airbag neck needs to be aligned with the flange, and then multiple bolts need to be tightened one by one. This process is cumbersome, has low production efficiency, and requires a certain level of technical skill from the operators. Uneven tightening of the bolts can also directly lead to poor sealing. Therefore, this utility model proposes a pressure tank for water pumps based on closed-loop water circulation. Utility Model Content

[0004] The purpose of this invention is to provide a pressure tank for a water pump based on a closed-loop water circulation system, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a pressure tank for a water pump based on a closed-loop water circulation system, comprising a tank body, an air bladder disposed inside the tank body, and an end cap fixed to the opening end of the tank body; the neck of the air bladder is sealed to the opening of the tank body through a fixing structure, the fixing structure including an integral locking ring; the inner wall of the opening end of the tank body is provided with an inwardly protruding annular retaining platform; the neck of the air bladder is provided with an outwardly protruding conical annular block, the side of the conical annular block being provided with an annular retaining groove for locking the annular retaining platform; the integral locking ring is embedded between the neck of the air bladder and the inner wall of the opening end of the tank body, and its inner bottom is provided with a second conical surface that mates with the first conical surface of the conical annular block; the inner wall of the end cap is threadedly connected to the opening end of the tank body, and when the end cap is tightened, the inner top surface of the end cap presses against the top of the integral locking ring, thereby axially pressing the integral locking ring, so that the conical annular block of the neck of the air bladder is tightly clamped between the annular retaining platform and the integral locking ring.

[0006] Preferably, the first conical surface and the second conical surface are rough surfaces.

[0007] Preferably, a sealing rubber gasket is fixedly provided on the top end face of the integral locking ring.

[0008] Preferably, the bottom center of the airbag is provided with an inwardly recessed positioning groove, and the bottom inner wall center of the canister is provided with a protrusion that matches the positioning groove.

[0009] Preferably, the end cap is provided with a valve core for inflating or deflating gas into the airbag, and a water inlet connector connected to a water pump, through which water flows into and out of the chamber formed between the airbag and the tank.

[0010] Preferably, a groove is provided at the center of the inner top surface of the end cap, the size of which matches the top of the airbag neck, and the valve core is coaxially arranged with the groove; when the end cap is tightened, the top of the airbag is squeezed, and the elasticity of the rubber airbag forms a sealing structure in the groove.

[0011] Preferably, the integral locking ring is made of engineering plastic.

[0012] Preferably, the integral locking ring has an annular groove that connects the upper and lower parts inside.

[0013] Preferably, an annular connecting plate is fixedly provided inside the annular groove, the annular connecting plate is fixedly connected to the two side walls of the annular groove, and the annular connecting plate is provided with first water passage holes distributed circumferentially.

[0014] Preferably, the annular card platform is provided with a second water passage hole distributed circumferentially.

[0015] Compared with traditional technologies, the beneficial effects of this utility model are:

[0016] This device simplifies the assembly process by replacing the traditional flange bolt connection with an integral locking ring structure. During assembly, simply insert the conical annular block at the neck of the airbag into the annular locking platform at the opening end of the tank, and then insert the integral locking ring. Finally, tighten the end cap to fix and seal the airbag. This eliminates the need to tighten multiple bolts one by one, reducing operational difficulty and time, improving production efficiency, and reducing reliance on the operator's skill level.

[0017] The sealing reliability of the device is improved by using a conical surface fit and an axial clamping mechanism. The second conical surface of the integral locking ring fits tightly with the first conical surface of the airbag neck, and axial pressure is generated when the end cap is tightened, so that the airbag neck is firmly clamped between the annular clamp and the integral locking ring, forming a multiple sealing effect. This avoids the problem of poor sealing caused by uneven bolt tightening, and ensures complete isolation between the water chamber and the air chamber, thereby enhancing the stability and safety of the system operation.

[0018] By setting the positioning groove at the bottom of the airbag to cooperate with the protrusion at the bottom of the tank, the centering stability of the airbag in the tank is ensured, reducing the risk of lateral displacement or torsion of the airbag; at the same time, the design of the integral locking ring and the first and second water passage holes on the annular locking platform promotes the uniform distribution of water flow in the chamber, which helps to absorb system pressure fluctuations more efficiently, reduce the frequent start and stop of the water pump, extend the service life of the equipment, and achieve energy saving. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a cross-sectional view of the overall structure of this utility model;

[0021] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0022] Figure 4 This is a schematic diagram of the structure below the end cap of this utility model;

[0023] Figure 5 This is a cross-sectional schematic diagram of the integral locking ring and conical annular block structure of this utility model;

[0024] Figure 6 This is a schematic diagram of the airbag structure of this utility model.

[0025] In the diagram: 1-Tank body; 2-Airbag; 3-End cap; 4-Integral locking ring; 5-Annular locking platform; 6-Conical annular block; 7-Annular groove; 8-First conical surface; 9-Second conical surface; 10-Sealing rubber gasket; 11-Positioning groove; 12-Protrusion; 13-Valve core; 14-Water inlet connector; 15-Settling groove; 16-Annular groove; 17-Annular connecting plate; 18-First water passage hole; 19-Second water passage hole. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example 1:

[0028] Please see Figures 1-5The diagram shows a pressure tank for a water pump based on a closed-loop water circulation system, comprising a tank body 1, an air bladder 2 disposed inside the tank body 1, and an end cap 3 fixed to the opening end of the tank body 1. The neck of the air bladder 2 is sealed to the opening of the tank body 1 by a fixing structure, which includes an integral locking ring 4. The inner wall of the opening end of the tank body 1 is provided with an inwardly protruding annular retaining plate 5, which provides a key axial support point. The neck of the air bladder 2 is provided with an outwardly protruding conical annular block 6, and the side of the conical annular block 6 is provided with an annular groove 7 for locking the annular retaining plate 5, forming preliminary positioning and support. The integral locking ring 4 is embedded between the neck of the air bladder 2 and the inner wall of the opening end of the tank body 1, and its inner bottom is provided with a second conical surface 9 that mates with the first conical surface 8 of the conical annular block 6. The inner wall of the end cap 3 is threadedly connected to the opening end of the tank body 1. When the end cap 3 is tightened, its inner top surface presses against the top of the integral locking ring 4, generating a downward axial pressure. This pressure is transmitted through the integral locking ring 4, which ultimately clamps the conical annular block 6 of the airbag 2's neck tightly between the annular locking platform 5 and the integral locking ring 4, thus achieving a boltless connection with excellent sealing performance and easy assembly.

[0029] Among them, the first conical surface 8 and the second conical surface 9 are rough surfaces, which increases the friction between the two conical contact surfaces and prevents relative sliding or loosening between the integral locking ring 4 and the neck of the airbag 2 under system pressure fluctuation or vibration conditions, thus ensuring the long-term stability and reliability of the fixed structure.

[0030] Meanwhile, the bottom center of the airbag 2 is provided with an inwardly recessed positioning groove 11, and the bottom inner wall center of the tank body 1 is provided with a protrusion 12 that matches the positioning groove 11. The positioning groove 11 and the protrusion 12 cooperate with each other to ensure that the airbag 2 always maintains a centered position during the filling and draining of water, preventing it from shifting or twisting laterally, thereby avoiding unnecessary friction between the airbag 2 and the inner wall of the tank body 1 and extending the service life of the airbag 2.

[0031] In addition, the end cap 3 is provided with a valve core 13 for inflating or deflating gas into the airbag 2. The pressure of the pre-inflated gas in the airbag 2 can be easily adjusted through the valve core 13. There is also a water inlet connector 14 connected to the water pump. The system water flows through the water inlet connector 14 into and out of the chamber formed between the airbag 2 and the tank 1, completing the energy exchange and buffering between the water circulation system and the pressure tank.

[0032] In this technical solution, a groove 15 is provided at the center of the inner top surface of the end cap 3. The size of the groove 15 matches the top of the neck of the airbag 2. The valve core 13 is coaxially arranged with the groove 15. When the end cap 3 is tightened, it will squeeze the top of the airbag 2. Utilizing the elasticity of the rubber material used to manufacture the airbag 2, the top of the airbag 2 will deform and embed into the groove 15, thereby forming an additional and effective secondary sealing structure in the groove 15 area, further eliminating the possibility of leakage between the water cavity and the air cavity.

[0033] It is worth noting that the integral locking ring 4 is made of engineering plastic. Engineering plastic is lightweight and easy to assemble; it has a certain degree of self-lubrication, which can reduce friction when tightening the end cap 3; it is corrosion resistant and can adapt to complex water quality environments; and its hardness is moderate, which can provide sufficient clamping force when clamping the airbag 2, without easily cutting or wearing the neck of the airbag 2 like metal.

[0034] In this technical solution, the integral locking ring 4 has an annular groove 16 that connects the upper and lower parts inside. This effectively reduces the weight and saves materials while ensuring the structural strength of the integral locking ring 4. More importantly, this annular groove 16 provides a smooth channel for water flow, ensuring that water can flow smoothly into the space above and below the integral locking ring 4, promoting uniform water distribution and pressure balance within the tank 1. An annular connecting plate 17 is fixedly installed inside the annular groove 16, connecting the two side walls of the annular groove 16. This enhances the overall structural strength and rigidity of the integral locking ring 4 after slotting, preventing deformation or breakage under pressure. Simultaneously, to avoid affecting water flow, circumferentially distributed first water passage holes 18 are opened on the annular connecting plate 17, ensuring unobstructed water flow through the integral locking ring 4. In addition, the annular platform 5 is provided with a second water passage hole 19 distributed circumferentially, which allows water to flow freely through the area of ​​the annular platform 5 and form a continuous circulation between the neck of the airbag 2 and the bottom area of ​​the tank 1, ensuring the timeliness and consistency of the pressure response of the entire water chamber, thereby effectively playing the role of the pressure tank in absorbing pressure fluctuations and buffering water hammer effects.

[0035] The working principle of the device is as follows:

[0036] Before the equipment is put into operation, gas at a certain pressure is first injected into the airbag 2 through the valve core 13 on the end cover 3 to form a pre-charge pressure. At this time, since the external water pressure is zero, the airbag 2 expands under its own air pressure, occupying most of the space inside the tank 1. At the same time, the positioning groove 11 at the bottom of the airbag 2 cooperates with the protrusion 12 at the bottom of the tank 1 to ensure that the airbag 2 is centered in the tank 1, providing a stable and centered initial state for subsequent work.

[0037] When the closed-loop water circulation system starts, the water pump begins to operate, pressurizing water into the pressure tank. The water flows through the water inlet connector 14 on the end cap 3 and enters the chamber (i.e., the water cavity) formed between the outer wall of the air bladder 2 and the inner wall of the tank body 1. As water is continuously injected, the volume of the water cavity increases, and the pressure rises. This pressure acts on the surface of the air bladder 2, compressing it and reducing its volume. The gas inside the air bladder 2 is compressed, and the pressure rises accordingly. This process continues until the pressure in the water cavity and the pressure of the gas inside the air bladder 2 reach equilibrium. At this point, the system pressure tends to stabilize.

[0038] During normal system operation, when the system pressure rises instantaneously due to temperature changes, the opening or closing of water points, or other reasons, high-pressure water quickly enters the water chamber of the pressure tank, further compressing the air bladder 2. The air bladder 2 absorbs this excess water and pressure energy through the compression and deformation of its internal gas, suppressing the rapid rise in system pressure and protecting equipment such as pipes and pumps. Conversely, when the system pressure drops instantaneously, the compressed air bladder 2 expands, pushing its stored water back into the system pipeline to replenish pressure promptly, preventing excessively low system pressure and reducing the frequency of pump starts and stops due to frequent responses to minor pressure changes.

[0039] Throughout the entire operation, the fixed structure ensures reliable sealing. The end cap 3, through the axial pressure applied by the threads, forces the second conical surface 9 of the integral locking ring 4 to tightly fit against the first conical surface 8 of the airbag 2's neck, firmly locking the conical annular block 6 onto the annular locking platform 5, ensuring absolute isolation between the air chamber and water chamber under high pressure. The first water passage hole 18 and the second water passage hole 19 on the integral locking ring 4 and the annular locking platform 5 ensure that water flows smoothly and evenly throughout the water chamber, making the pressure response more sensitive and consistent. The system will maintain this dynamic balance until the water pump stops operating. After the system is depressurized, the airbag 2 will rely on the pressure of its internal gas to return to its initial inflated state, ready for the next working cycle.

[0040] Example 2:

[0041] This embodiment is an optimization of the structure in Embodiment 1. Specifically, a sealing rubber pad 10 is fixedly provided on the top end face of the integral locking ring 4.

[0042] The integral locking ring 4 is pressed against the inside of the end cover 3 by the sealing rubber gasket 10, which improves the sealing performance between the integral locking ring 4 and the end cover 3 and further prevents water from flowing out between the integral locking ring 4 and the end cover 3.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pressure tank for a water pump based on a closed-loop water circulation, comprising a tank body (1), an air bladder (2) disposed inside the tank body (1), and an end cap (3) fixed to the open end of the tank body (1); Its features are: The neck of the airbag (2) is sealed to the opening of the tank (1) by a fixing structure, the fixing structure including an integral locking ring (4); The inner wall of the opening end of the tank (1) is provided with a ring-shaped bracket (5) that protrudes inward; The airbag (2) has a cone-shaped annular block (6) protruding outward from the neck, and the cone-shaped annular block (6) has an annular groove (7) on its side for locking the annular locking platform (5); The integral locking ring (4) is embedded between the neck of the airbag (2) and the inner wall of the opening end of the tank (1), and its inner bottom is provided with a second conical surface (9) that cooperates with the first conical surface (8) of the conical annular block (6); The inner wall of the end cap (3) is threaded to the opening end of the tank body (1). When the end cap (3) is tightened, the inner top surface of the end cap (3) presses against the top of the integral locking ring (4), thereby axially pressing the integral locking ring (4) so ​​that the conical annular block (6) of the neck of the airbag (2) is tightly clamped between the annular locking platform (5) and the integral locking ring (4).

2. The pressure tank for a water pump based on a closed-loop water circulation system according to claim 1, characterized in that: The first conical surface (8) and the second conical surface (9) are rough surfaces.

3. A pressure tank for a water pump based on a closed-loop water circulation system according to claim 1, characterized in that: The top end face of the integral locking ring (4) is fixed with a sealing rubber pad (10).

4. A pressure tank for a water pump based on a closed-loop water circulation as described in claim 1, characterized in that: The airbag (2) has an inwardly recessed positioning groove (11) at the center of its bottom, and the tank (1) has a protrusion (12) at the center of its bottom inner wall that matches the positioning groove (11).

5. A pressure tank for a water pump based on a closed-loop water circulation as described in claim 1, characterized in that: The end cap (3) is provided with a valve core (13) for inflating or deflating gas into the airbag (2), and a water inlet connector (14) connected to a water pump. Water flows through the water inlet connector (14) into and out of the chamber formed between the airbag (2) and the tank (1).

6. A pressure tank for a water pump based on a closed-loop water circulation as described in claim 5, characterized in that: The end cap (3) has a recessed groove (15) at the center of the inner top surface. The size of the recessed groove (15) matches the top of the neck of the airbag (2). The valve core (13) is coaxially arranged with the recessed groove (15). When the end cap (3) is tightened, the top of the airbag (2) is squeezed, and the elasticity of the rubber material of the airbag (2) forms a sealing structure in the recessed groove (15).

7. A pressure tank for a water pump based on a closed-loop water circulation as described in claim 1, characterized in that: The integral locking ring (4) is made of engineering plastic.

8. A pressure tank for a water pump based on a closed-loop water circulation system according to claim 1, characterized in that: The integral locking ring (4) has an annular groove (16) that is connected vertically inside.

9. A pressure tank for a water pump based on a closed-loop water circulation as described in claim 8, characterized in that: An annular connecting plate (17) is fixedly provided inside the annular groove (16). The annular connecting plate (17) is fixedly connected to the two side walls of the annular groove (16), and the annular connecting plate (17) is provided with circumferentially distributed first water passage holes (18).

10. A pressure tank for a water pump based on a closed-loop water circulation system according to claim 1, characterized in that: The annular card platform (5) is provided with a second water passage (19) distributed circumferentially.

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