Inner container type water hammer eliminating tank

Abstract

The utility model discloses an inner container type water hammer eliminating tank, and relates to the field of pressure pipeline equipment. The water hammer eliminating tank comprises a tank body, a top cover and an elastic inner container, an upper opening in the top of the elastic inner container is concentrically arranged in an upper access hole in the top of the tank body in a sleeved mode, a lower opening in the bottom of the elastic inner container is concentrically arranged in a lower access hole in the bottom of the tank body in a sleeved mode, and a connecting pipe communicated with the lower opening is arranged at the bottom of the lower access hole. By means of the well-designed tank body structure, the elastic inner container structure, the top cover type and the protector configuration, efficient elimination of the pipeline water hammer phenomenon and long-term stable operation are achieved. The water hammer eliminating tank not only has excellent water hammer resistance, but also has the advantages of being long in service life and convenient to maintain, and provides powerful guarantee for safe operation of a pressure pipeline system.

Description

Technical Field

[0001] The utility model relates to the field of pressure pipeline equipment, in particular to an inner-liner type water hammer elimination tank. Background Art

[0002] Water hammer is a persistent and difficult-to-ignore problem in pressure piping systems. Water hammer, defined as pressure fluctuations caused by sudden changes in water velocity in a pipe, not only subjects the piping system to immense pressure but can also lead to serious consequences such as pipe ruptures, valve damage, and equipment failure, severely impacting both industrial production and the normal operation of residents' lives. Water hammer is particularly prominent in industries such as water supply, heating, petroleum, and chemical engineering, where pressure piping networks are complex and extensive, posing a significant challenge to the safety and stability of the piping system.

[0003] Traditionally, the engineering community has employed various methods to mitigate water hammer, such as installing slow-closing valves, air valves, and surge tanks. However, these methods often suffer from high maintenance costs, slow response times, and inconsistent effectiveness. Especially in high-pressure, high-flow piping systems, traditional measures often struggle to effectively address sudden water hammer incidents and fail to fundamentally resolve the problem.

[0004] With the advancement of materials science and engineering technology, researchers are exploring more efficient and reliable water hammer mitigation solutions. As a new type of pipeline safety protection device, water hammer eliminators (WAITs) are gaining industry attention and recognition for their unique structural design and operating principles. These WAITs utilize a built-in elastic liner and are pre-charged with pressurized gas. These WAITs automatically adjust to pipeline pressure fluctuations, effectively slowing the rise and fall of pressure and thereby mitigating or eliminating water hammer.

[0005] However, existing water hammer arresters still have some shortcomings in their design and application. For example, factors such as the design of the elastic liner and its corresponding structure, and the control of the pre-charge gas pressure, directly affect the performance and service life of the water hammer arrester. Therefore, how to further optimize the structural design of water hammer arresters and improve their reliability and practicality has become a pressing issue. Utility Model Content

[0006] To address the shortcomings of the existing technology, the present invention aims to provide a liner-type water hammer eliminator. Through its meticulously designed tank structure, elastic liner structure, top cover, and protector configuration, this new device achieves highly effective elimination of pipeline water hammer and long-term stable operation. This new water hammer eliminator not only exhibits excellent water hammer resistance but also boasts a long service life and easy maintenance, effectively safeguarding the safe operation of pressure piping systems. Furthermore, the present invention's technical solutions offer valuable insights and references for technological innovation and product upgrades in related fields.

[0007] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0008] The utility model provides an inner-liner type water hammer elimination tank, comprising a tank body, a top cover and an elastic inner liner, wherein an upper opening of the top of the elastic inner liner is concentrically sleeved in an upper inspection opening on the top of the tank body, and a lower opening of the bottom of the elastic inner liner is concentrically sleeved in a lower inspection opening on the bottom of the tank body, and a connecting pipe communicating with the lower opening is provided at the bottom of the lower inspection opening.

[0009] Preferably, the top cover includes a flange cover for connecting to the tank body, a conical cylinder section is provided at the bottom of the flange cover, a first head is provided at the bottom of the conical cylinder section, an exhaust valve is provided on the flange cover, and openings are provided on the conical cylinder section and the first head.

[0010] Preferably, a gasket is sandwiched between the flange cover and the upper inspection port, the edge of the upper opening is sandwiched between the gasket and the flange cover, the flange cover, the upper opening, the gasket and the upper inspection port are fixedly connected by a first fastener, the flange cover, the upper opening and the gasket are fixedly connected by a second fastener, and a lifting ear is provided on the top of the flange cover.

[0011] More preferably, the following conditions need to be met:

[0012] ∠A≤30°; φB-φC≥3t; φB-φC≤10t; φB≥2φD; the opening diameter on the cone section and the first head ≤t;

[0013] Among them, ∠A is the angle of the cone section, φB is the diameter of the upper inspection port, φC is the maximum diameter of the cone section, φD is the outer diameter of the first head, and t is the thickness of the elastic liner.

[0014] Preferably, a protector for protecting the elastic inner liner is installed in the lower inspection port, and the protector includes a flange edge for connecting with the tank body, a straight cylindrical section is provided on the top of the flange edge, a second head is provided on the top of the straight cylindrical section, and openings are provided on the straight cylindrical section and the second head.

[0015] Preferably, the edge of the lower opening is sandwiched between the lower inspection port and the flange edge, the lower inspection port, the lower opening and the flange edge are fixedly connected by a second fastener, and the lower inspection port, the lower opening, the flange edge and the connecting pipe are fixedly connected by a first fastener.

[0016] More preferably, the following conditions need to be met:

[0017] The diameter of the openings on the straight section and the second head is ≤t; the total effective flow area of ​​all openings on the protector is S≥S φF ×80%; φE-φF≥3t; φE-φF≤10t;

[0018] Among them, φE is the diameter of the lower inspection port, φF is the outer diameter of the straight section, and t is the thickness of the elastic liner.

[0019] Preferably, the elastic inner liner includes a straight cylinder, the upper and lower ends of the straight cylinder are respectively connected to an upper conical cylinder section and a lower conical cylinder section, the top of the upper conical cylinder section is connected to an upper neck cylinder, and the bottom of the lower conical cylinder section is connected to a lower neck cylinder, and the outlet edges of the upper neck cylinder and the lower neck cylinder are both provided with curling edges, and fixing holes are provided on the curling edges.

[0020] Preferably, the inner bottom of the tank body is provided with a conical base, and the conical base is provided with an opening.

[0021] Preferably, the side of the tank body is provided with an air filling port, a pressure sensor and a liquid level gauge, the top of the tank body is provided with a lifting lug, and the bottom of the tank body is provided with a medium sensor and a support foot.

[0022] Compared with the existing technology, the liner-type water hammer elimination tank of the utility model has the following significant advantages and beneficial effects:

[0023] (1) Through the built-in elastic liner design, the water hammer elimination tank of the utility model can respond to pressure fluctuations in the pipeline in real time. Whether the pressure rises or falls suddenly, it can effectively delay the pressure change, thereby significantly alleviating or completely eliminating the water hammer phenomenon and protecting the pipeline system from impact damage.

[0024] (2) The top cover adopts a conical section and a head design. When the elastic inner liner gradually shrinks inward, it is close to the conical section. The pressure of the external compressed air is borne by the conical section and the head. When the entire elastic inner liner shrinks, there is no upward movement trend. The elastic inner liner only needs to bear its own gravity and is not prone to rupture. This effectively alleviates the stress state of the elastic inner liner, avoids the elastic inner liner from being torn, and improves the reliability and service life of the equipment.

[0025] (3) The top cover and the tank body are fixed in multiple ways using pads and fasteners, ensuring the stability and sealing of the connection between the elastic liner and preventing gas leakage and water infiltration. In addition, the top cover, pads and elastic liner are fixed separately, making it easy to directly lift out the top cover, pads and elastic liner as a whole through the lifting lugs on the top of the top cover. The removal and installation process of the elastic liner is simple and quick. It can be lifted out as a whole by simply removing a few fasteners and lifting lugs, greatly reducing maintenance costs and time.

[0026] (4) A protector is set in the lower inspection port. When there is no water inside the tank or the water is completely discharged under pressure, the elastic liner can directly adhere to the surface of the protector to prevent the elastic liner from being blown out and ruptured. The reasonable opening design also ensures the smooth passage of water flow, further improving the water hammer elimination effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the utility model of the inner liner type water hammer elimination tank.

[0028] Figure 2 It is a structural schematic diagram of the tank body of the utility model.

[0029] Figure 3 It is a structural schematic diagram of the elastic liner of the utility model.

[0030] Figure 4 It is a structural schematic diagram of the top cover of the utility model.

[0031] Figure 5 It is a structural diagram of the protector of the utility model.

[0032] Figure 6 It is a structural diagram of the stress state of the elastic inner liner when the top cover is designed as a flat structure.

[0033] Figure 7 This is a schematic diagram of the force analysis of the elastic liner when the top cover is designed as a flat structure.

[0034] Figure 8 It is a structural schematic diagram of the stress state of the elastic inner liner when the top cover is designed as the structure of the utility model.

[0035] Figure 9 It is a schematic diagram of the connection structure of the top cover, elastic liner and tank body of the utility model.

[0036] Figure 10 This is a schematic diagram of the structure of the elastic liner of the utility model when it is hung out.

[0037] Figure 11 It is a schematic diagram of the connection structure of the protector, elastic liner and tank body of the utility model.

[0038] Figure 12 This is a schematic diagram of the state structure of the inner tank type water hammer elimination tank of the utility model. Figure 1 .

[0039] Figure 13 This is a schematic diagram of the state structure of the inner tank type water hammer elimination tank of the utility model. Figure 2 .

[0040] Figure 14 This is a schematic diagram of the state structure of the inner tank type water hammer elimination tank of the utility model. Figure 3 .

[0041] Figure 15 This is a schematic diagram of the state structure of the inner tank type water hammer elimination tank of the utility model. Figure 4 .

[0042] Figure markings: 1. Tank body; 101. Upper inspection port; 102. Lower inspection port; 103. Conical bottom support; 104. Inflation port; 105. Pressure sensor; 106. Liquid level gauge; 107. Medium sensor; 108. Support leg; 2. Top cover; 201. Flange cover; 202. Conical section; 203. First head; 204. Lifting ear; 205. Exhaust valve; 3. Elastic liner; 301. Upper opening; 302. Lower opening; 303. Straight cylinder; 304. Upper conical section; 305. Lower conical section; 306. Curled edge; 4. Connecting pipe; 5. Opening; 6. Pad; 7. First fastener; 8. Second fastener; 9. Protector; 901. Flange edge; 902. Straight cylinder; 903. Second head. DETAILED DESCRIPTION

[0043] In order to enable those skilled in the art to better understand the technical solution of the present invention, the preferred embodiments of the present invention are described below in conjunction with specific embodiments. However, it should be understood that the drawings are for illustrative purposes only and are not to be construed as limiting this patent. To better illustrate this embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the dimensions of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are for illustrative purposes only and are not to be construed as limiting this patent.

[0044] This specific embodiment aims to describe in detail the inner-liner water hammer elimination tank of the utility model and its application in eliminating water hammer, and further illustrate its structural composition, working principle and technical features in the preferred embodiment.

[0045] like Figure 1As shown, a liner-type water hammer suppression tank includes the following main components: a tank body 1, a top cover 2, an elastic liner 3, and a protector 9. The upper opening 301 at the top of the elastic liner 3 is concentrically sleeved within the upper inspection port 101 at the top of the tank body 1, and the lower opening 302 at the bottom of the elastic liner 3 is concentrically sleeved within the lower inspection port 102 at the bottom of the tank body 1. The bottom of the lower inspection port 102 is provided with a connecting pipe 4 that communicates with the lower opening 302.

[0046] like Figure 2 As shown, in some examples, the tank body 1 is a vertical structure and is arranged vertically. The inner bottom of the tank body 1 is provided with a conical base 103, and the conical base 103 is provided with an opening 5; the side of the tank body 1 is provided with an air filling port 104, a pressure sensor 105 and a liquid level gauge 106, the top of the tank body 1 is provided with a lifting lug 204, and the bottom of the tank body 1 is provided with a medium sensor 107 and a support leg 108. The upper and lower inspection ports 102 adopt a standard flange structure, which is mainly used to fix the elastic liner 3, and is also a manhole for installation and maintenance. All welds and sharp corners on the inner surface of the tank body 1 need to be polished flat or polished to a rounded corner. The configuration of the pressure sensor 105 and the medium sensor 107 can monitor the pressure and medium status in the tank in real time, provide data support for preventive maintenance, and enhance the intelligent management level of the system.

[0047] like Figure 3 As shown, in some examples, the elastic inner liner 3 includes a straight cylinder 303, the upper and lower ends of the straight cylinder 303 are respectively connected to an upper conical cylinder section 304 and a lower conical cylinder section 305, the top of the upper conical cylinder section 304 is connected to an upper neck cylinder, and the bottom of the lower conical cylinder section 305 is connected to a lower neck cylinder, and the outlet edges of the upper neck cylinder and the lower neck cylinder are both provided with a curling edge 306, and a fixing hole is provided on the curling edge 306 to facilitate fixation.

[0048] Specifically, the elastic liner 3 is made of a rubber material with excellent elasticity. Common materials include: nitrile rubber, EPDM rubber, neoprene rubber, and polyurethane rubber. When using highly elastic rubbers such as nitrile rubber, EPDM rubber, and neoprene rubber, the size of the elastic liner 3 is slightly smaller than the volume of the tank body 1, generally 60-100% smaller. When using polyurethane rubber, the elastic liner 3 should be 100% equal to the volume of the tank body 1. Note: The volume of the elastic liner 3 refers to the volume of the elastic liner 3 when it is naturally expanded. Using a highly elastic and airtight rubber material as the elastic liner 3, and adjusting the size of the elastic liner 3 according to the characteristics of different rubber materials, not only ensures a good cushioning effect, but also takes into account economy and practicality.

[0049] like Figure 4As shown, in some examples, the top cover 2 is a steel structure and includes a lifting lug 204, a flange cover 201, a conical section 202, and a first end cap 203. The flange cover 201 is provided with a circle of flange holes and countersunk holes for connection to the tank body 1. The conical section 202, the first end cap 203, and the flange cover 201 are welded together, and the welds are polished to be smooth and free of burrs. The flange cover 201 is provided with an exhaust valve 205, and both the conical section 202 and the first end cap 203 are provided with an opening 5.

[0050] Specifically, a backing plate 6 is sandwiched between the flange cover 201 and the upper inspection opening 101. The edge of the upper opening 301 is sandwiched between the backing plate 6 and the flange cover 201. The flange cover 201, the upper opening 301, the backing plate 6, and the upper inspection opening 101 are fixedly connected by a first fastener 7. The flange cover 201, the upper opening 301, and the backing plate 6 are fixedly connected by a second fastener 8. A lifting lug 204 is provided on the top of the flange cover 201. The addition of the backing plate 6 and the specific connection method make replacement of the elastic liner 3 simple and quick, reducing maintenance costs and downtime, and improving the maintainability of the equipment.

[0051] The type and structural size requirements of the top cover are as follows:

[0052] (1) Structural type

[0053] During the operation of the water hammer suppressor, water will be at the bottom of the tank under the action of gravity. The elastic liner 3 has a certain elasticity. Therefore, if the top cover 2 is a flat structure, the elastic liner 3 will tend to move downward under the action of the water and the elastic liner 3's gravity; while the pressure of the compressed gas will tend to flatten the elastic liner 3, pressing it against the top cover 2, and moving it upward. The final state of the elastic liner 3 is as follows: Figure 6 and Figure 7 As shown. In this state, the elastic liner 3 is subjected to two sets of large pulling forces, upward and downward, and the bent part is prone to tearing. In order to avoid the elastic liner 3 from tearing, the top cover 2 is added with a cone section 202 structure, which can effectively alleviate the stress state of the elastic liner 3. Figure 8 At this time, the elastic liner 3 gradually shrinks inwards, close to the conical section 202. The pressure of the external compressed air is borne by the conical section 202 and the head section. When the elastic liner 3 shrinks, there is no upward movement trend. The elastic liner 3 only needs to bear its own gravity and is not prone to rupture.

[0054] (2) Dimensions

[0055] To achieve this effect, the smaller the angle of the conical section 202, the more conducive it is to the implementation of this structure. The smaller the outer diameter of the head, the more conducive it is to the implementation of this structure. In addition, the difference between the outer diameter of the conical section 202 and the diameter of the inspection port 101 on the tank body 1 should be reasonable. Therefore, the following requirements should be met as much as possible:

[0056] ∠A≤30°; φB-φC≥3t; φB-φC≤10t; φB≥2φD; the diameter of the openings on the conical cylinder section 202 and the first head 203 ≤t;

[0057] Wherein, ∠A is the angle of the conical cylinder section 202 , φB is the diameter of the upper inspection port 101 , φC is the maximum diameter of the conical cylinder section 202 , φD is the outer diameter of the first head 203 , and t is the thickness of the elastic liner 3 .

[0058] (3) Easy maintenance

[0059] During the use of the water hammer suppression tank, the elastic liner 3 needs to be replaced due to damage or expiration of its service life. If the top bead 306 of the elastic liner 3 is directly clamped by the flanges of the tank body 1 and the top cover 2, it is easy for the elastic liner 3 to fall into the tank due to gravity when the cover is removed and cannot be removed. By adding a pad 6 between the tank body 1 and the top cover 2, replacement can be facilitated. Its structure is as follows Figure 9 shown.

[0060] like Figure 10 As shown, the backing plate 6 is located between the top cover 2 and the tank body 1. The large bolts between the tank body 1 and the top cover 2 pass through the backing plate 6. At the same time, there is a circle of threaded holes on the backing plate 6, which is locked with the top cover 2 with small screws. The top curling edge 306 of the elastic liner 3 is clamped between the top cover 2 and the backing plate 6. A sealing ring is provided between the backing plate 6 and the tank body 1. When the elastic liner 3 needs to be taken out, the large bolts are first removed, and then the top cover 2, the backing plate 6 and the elastic liner 3 can be directly lifted out as a whole through the lifting ears 204 on the top of the top cover 2. Figure 10 shown.

[0061] like Figure 5 As shown, in some examples, a protector 9 is sleeved within the lower access opening 102 to protect the elastic liner 3. The protector 9 includes a flange 901 for connection to the tank body 1. A straight section 902 is disposed on top of the flange 901. A second end cap 903 is disposed on top of the straight section 902. Both the straight section 902 and the second end cap 903 are provided with openings 5. The edge of the lower opening 302 is sandwiched between the lower access opening 102 and the flange 901. The lower access opening 102, the lower opening 302, and the flange 901 are fixedly connected by a second fastener 8. The lower access opening 102, the lower opening 302, the flange 901, and the connecting pipe 4 are fixedly connected by a first fastener 7.

[0062] Specifically, the flange 901, the straight section 902, and the second end cap 903 are welded together, and the welds are polished smooth and burr-free. The straight section 902 and the second end cap 903 should be made of stainless steel. The flange is surrounded by a circle of flange holes and countersunk holes for connecting to the tank body 1 and securing the elastic liner 3. The second end cap 903 can be replaced with a flat plate.

[0063] In the above-mentioned structural design, the conical section 202 of the top cover 2 and the design of the protector 9 effectively improve the stress state of the elastic liner 3, avoiding the risk of tearing the elastic liner 3, while the protector ensures the stability of the bottom of the elastic liner 3 when there is no water or when the water level is low, preventing damage to the elastic liner 3. These designs improve the reliability and durability of the entire device.

[0064] Type and structural dimensions of the protector.

[0065] (1) Structural type

[0066] The bottom flange of the tank body 1 is connected to the flanged short tube via large studs, sandwiching the bottom bead 306 of the elastic liner 3 and the protector 9. Small screws are also provided between the protector 9 and the tank body 1 to initially secure the bead 306 of the elastic liner 3. When the tank body 1 is free of water or the water has been completely drained under pressure, the elastic liner 3 can adhere to the surface of the protector 9, preventing the elastic liner 3 from being blown out and rupturing.

[0067] (2) Dimensions

[0068] like Figure 11 As shown, the upper part of the straight section 902 of the protector 9 and the second head are provided with evenly arranged flow holes to prevent the elastic liner 3 from being damaged by pressure. The following parameters should be guaranteed:

[0069] The diameter of the opening on the straight section 902 and the second head 903 is ≤ t; the total effective flow area of ​​all openings 5 ​​on the protector 9 is S ≥ S φF ×80%; φE-φF≥3t; φE-φF≤10t;

[0070] Wherein, φE is the diameter of the lower inspection port 102 , φF is the outer diameter of the straight section 902 , and t is the thickness of the elastic liner 3 .

[0071] In some examples, the water hammer suppression tank is connected to the pressure pipe via a bottom connection port. The top and bottom of the elastic liner 3 are fixed to the tank body 1. Thus, the interior of the elastic liner 3 forms a container connected to the pipe, and a sealed space is formed between the elastic liner 3 and the tank body 1.

[0072] Water hammer elimination methods include:

[0073] (1) Before the water hammer eliminator is put into use, it is necessary to pre-fill the tank body 1 with pressurized gas (nitrogen or air). The gas pressure is 1 / 3 to 1 / 2 of the pipeline operating pressure. A pressurized air bag is formed in the enclosed space between the elastic liner 3 and the tank body 1. Figure 12 The status shown.

[0074] (2) When the water hammer elimination tank is put into operation, since the pre-filled gas pressure is lower than the normal operating pressure of the pipeline, water will enter the elastic inner liner 3 and gradually support the elastic inner liner 3. Since the elastic inner liner 3 is elastic rubber, under the action of water pressure and gravity, the pressure of gas and water reaches the same level, forming a liquid level in the tank. Figure 13 The status shown.

[0075] (3) When the pressure in the pressure pipe suddenly rises, the water pressure inside the water hammer eliminator rises rapidly along with the pipe pressure, but the pressure of the pressurized gas inside the tank body 1 does not change immediately. Therefore, a pressure difference is formed on the elastic inner liner 3, compressing the gas and causing water to enter the water hammer eliminator from the pipe, thus delaying the process of pipe pressure rising. At the same time, the gas volume is compressed in this process, and the pressure rises until it is consistent with the pipe water pressure again. Figure 14 The status shown.

[0076] (4) When a sudden pressure drop occurs in the pressure pipe, the water pressure inside the water hammer eliminator drops rapidly along with the pipe pressure, but the pressure of the pressurized gas inside the tank body 1 does not change immediately. Therefore, a pressure difference is formed on the elastic liner 3, compressing the elastic liner 3, causing water to enter the pipe to compensate for the pressure drop in the pipe, thereby delaying the process of pipe pressure drop. At the same time, during this process, the gas volume expands and the pressure drops until it is consistent with the pipe water pressure again. Figure 15 The status shown.

[0077] (5) The water hammer elimination tank can automatically respond to pipeline pressure fluctuations in real time, delay the rise and fall of pipeline pressure, and alleviate or completely eliminate water hammer.

[0078] This design instantly responds to pressure fluctuations in the pipeline. The pre-inflated air bladder (the enclosed space between the elastic liner and the tank body) effectively absorbs and disperses the effects of water hammer, protecting the piping system from damage caused by water hammer and extending its service life. Whether the pipeline pressure suddenly rises or falls, the water hammer eliminator automatically adjusts, compressing and expanding the gas to balance the instantaneous pressure changes, maintaining stable system operation and reducing equipment damage and safety accidents caused by water hammer.

[0079] In summary, the liner-type water hammer elimination tank of the utility model not only technically realizes the effective control and protection of pipeline water hammer, but also has significant improvements in structural design, material application, maintenance convenience and intelligent management. It is an efficient and reliable pipeline protection solution.

[0080] According to the description and drawings of the present invention, those skilled in the art can easily manufacture or use the inner liner type water hammer elimination tank of the present invention, and can produce the positive effects recorded in the present invention.

[0081] Unless otherwise specified, in this utility model, if there are terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicating orientation or positional relationships, they are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the orientation or positional relationships in this utility model are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, they can understand the specific meanings of the above terms in conjunction with the accompanying drawings and according to specific circumstances.

[0082] Unless otherwise specified or limited, the terms "disposed," "connected," and "connected" in this utility model should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediary, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0083] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A liner type water hammer elimination tank, comprising a tank body (1), a top cover (2) and an elastic liner (3), characterized in that: The upper opening (301) at the top of the elastic inner liner (3) is coaxially sleeved in the upper inspection opening (101) at the top of the tank body (1), and the lower opening (302) at the bottom of the elastic inner liner (3) is coaxially sleeved in the lower inspection opening (102) at the bottom of the tank body (1). A connecting pipe (4) communicating with the lower opening (302) is provided at the bottom of the lower inspection opening (102).

2. The inner liner type water hammer elimination tank according to claim 1 is characterized in that: The top cover (2) comprises a flange cover (201) for connecting to the tank body (1); a conical cylinder section (202) is arranged at the bottom of the flange cover (201); a first sealing head (203) is arranged at the bottom of the conical cylinder section (202); an exhaust valve (205) is arranged on the flange cover (201); and openings (5) are arranged on the conical cylinder section (202) and the first sealing head (203).

3. The inner liner type water hammer elimination tank according to claim 2 is characterized in that: A gasket (6) is sandwiched between the flange cover (201) and the upper inspection opening (101), and an edge of the upper opening (301) is sandwiched between the gasket (6) and the flange cover (201). The flange cover (201), the upper opening (301), the gasket (6) and the upper inspection opening (101) are fixedly connected by a first fastener (7), and the flange cover (201), the upper opening (301) and the gasket (6) are fixedly connected by a second fastener (8). A lifting ear (204) is provided on the top of the flange cover (201).

4. The inner liner type water hammer elimination tank according to claim 2 or 3, characterized in that: The following conditions need to be met: ∠A≤30°; φB-φC≥3t; φB-φC≤10t; φB≥2φD; the opening diameters on the conical cylinder section (202) and the first end cap (203)≤t; Wherein, ∠A is the angle of the conical cylinder section (202), φB is the diameter of the upper inspection port (101), φC is the maximum diameter of the conical cylinder section (202), φD is the outer diameter of the first end cap (203), and t is the thickness of the elastic liner (3).

5. The inner liner type water hammer elimination tank according to claim 1 is characterized in that: A protector (9) for protecting the elastic liner (3) is sleeved in the lower inspection port (102), the protector (9) comprising a flange (901) for connecting with the tank body (1), a straight section (902) being arranged on the top of the flange (901), a second sealing head (903) being arranged on the top of the straight section (902), and openings (5) being arranged on both the straight section (902) and the second sealing head (903).

6. The inner liner type water hammer elimination tank according to claim 5 is characterized in that: An edge of the lower opening (302) is sandwiched between the lower inspection port (102) and the flange edge (901); the lower inspection port (102), the lower opening (302) and the flange edge (901) are fixedly connected via a second fastener (8); and the lower inspection port (102), the lower opening (302), the flange edge (901) and the connecting pipe (4) are fixedly connected via a first fastener (7).

7. The inner liner type water hammer elimination tank according to claim 5 or 6, characterized in that: The following conditions need to be met: The diameter of the openings on the straight section (902) and the second end cap (903) is ≤ t; the total effective flow area of ​​all the openings on the protector (9) is S ≥ S φF ×80%; φE-φF≥3t; φE-φF≤10t; Wherein, φE is the diameter of the lower inspection port (102), φF is the outer diameter of the straight tube section (902), and t is the thickness of the elastic liner (3).

8. The inner liner type water hammer elimination tank according to claim 1 is characterized in that: The elastic liner (3) comprises a straight cylinder (303), the upper and lower ends of the straight cylinder (303) are respectively connected to an upper cone cylinder section (304) and a lower cone cylinder section (305), the top of the upper cone cylinder section (304) is connected to an upper neck cylinder, and the bottom of the lower cone cylinder section (305) is connected to a lower neck cylinder, and the outlet edges of the upper neck cylinder and the lower neck cylinder are both provided with curling edges (306), and the curling edges (306) are provided with fixing holes.

9. The inner liner type water hammer elimination tank according to claim 1, characterized in that: The inner bottom of the tank body (1) is provided with a conical base (103), and the conical base (103) is provided with an opening (5).

10. The liner type water hammer elimination tank according to claim 1 or 9, characterized in that: The side of the tank body (1) is provided with an air filling port (104), a pressure sensor (105) and a liquid level meter (106), the top of the tank body (1) is provided with a lifting lug (204), and the bottom of the tank body (1) is provided with a medium sensor (107) and a support foot (108).

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