Pipeline pressure stabilizing type pressure tank

Abstract

The invention relates to the technical field of water conveying pipeline systems, and discloses a pipeline pressure stabilizing type pressure tank which comprises a container and a liquid level control switch device, the container is provided with an air suction hole and a pipeline communicating opening which are communicated with an inner cavity of the container, the position of the air suction hole is higher than that of the pipeline communicating opening, and the liquid level control switch device is arranged in the inner cavity of the container. When the height of the liquid level in the container is above the first position, the liquid level control switch device enables the air suction port to be normally sealed and closed, and when the height of the liquid level in the container is lower than the first position, the liquid level control switch device opens the air suction port. Compared with a water hammer eliminating tank, the pipeline pressure stabilizing type pressure tank is not provided with an inner container, the risk that the inner container is broken is avoided, but the pipeline pressure reducing and water supplementing capacity is still high, the structure is simple, and reliability is high; compared with a pressure regulating tower, the pipeline pressure stabilizing type pressure tank has air mass with pressure, the pressure reducing and water supplementing capacity is greatly improved, and the pipeline pressure stabilizing type pressure tank can have smaller size and height.

Description

Technical Field

[0001] The present invention relates to the technical field of water delivery pipeline systems, and more specifically to a pipeline pressure-stabilizing pressure tank. Background Art

[0002] Usually, in a water pipe system, when a pump suddenly stops or a valve is suddenly closed, a transient state of rapid changes in flow and pressure will occur, which is called water hammer. When water hammer occurs, due to the propagation of pressure waves caused by the sudden change in flow in the pipe, the pressure in the pipe rises rapidly, or the pressure in the pipe drops, and the pipe may collapse or be damaged due to the shock wave.

[0003] In order to prevent losses caused by water hammer hazards, water hammer protection devices such as water hammer elimination tanks or two-way pressure regulating towers are generally installed in the pump water pipeline system to replenish water to the pipeline or absorb excessive pressure in the pipeline, so as to reduce the water hammer phenomenon caused by changes in fluid flow in the pipeline.

[0004] In the prior art, a water hammer eliminator is usually a pressure tank with an inner liner, which compresses the capsule inner liner with pre-filled compressed gas to offset the pressure fluctuation of water entering the capsule inner liner from the pipeline. Due to the effect of high-pressure gas, compared with a normal pressure regulating tower, under the same pipeline pressure condition, the water hammer eliminator can have a smaller volume and height. However, when the capsule inner liner absorbs the positive pressure of the pipeline, there is a risk of capsule rupture and damage, and it is necessary to design an inlet pipeline with throttling and energy dissipation to reduce the positive pressure peak. Whether it is a regulating tower or a water hammer eliminator, other valves or accessories are required to realize their functions in conjunction, and their application sites are also subject to certain restrictions. Summary of the invention

[0005] The present invention provides a pipeline pressure-stabilizing pressure tank, the purpose of which is to overcome the above-mentioned problems existing in the prior art.

[0006] In order to achieve the above object, the technical solution provided by the present invention is:

[0007] A pipeline pressure-stabilizing pressure tank, comprising:

[0008] The container is provided with an air suction port and a pipeline connecting port connected to the inner cavity thereof, wherein the air suction port is located higher than the pipeline connecting port;

[0009] A liquid level control switch device is arranged in the inner cavity of the container. When the liquid level height in the container is above a first position, the liquid level control switch device keeps the air intake port normally sealed and closed. When the liquid level height in the container is lower than the first position, the liquid level control switch device opens the air intake port.

[0010] The pipeline pressure-stabilizing pressure tank is connected to the water pipeline through the pipeline connecting port. When the water in the pipeline enters the container and reaches a height above the first position, the liquid level control switch device closes the air intake port, and the air in the container cannot be discharged. A pressure gas mass can be formed in the inner cavity of the container, which can balance the pressure fluctuation in the water pipeline, thereby preventing the pipeline from generating water hammer hazards. The pressure tank has no inner liner, low cost, high safety, and good water hammer resistance.

[0011] Furthermore, the liquid level control switch device includes a switch element and a float; the switch element is arranged at the air suction port for opening or closing the air suction port; the float is placed in the inner cavity of the container and is connected to the switch element through a connecting element, when the float rises with the liquid level in the container to above a first position, the float links the switch element to close the air suction port, and when the float drops with the liquid level to below the first position, the float links the switch element to open the air suction port.

[0012] Through the above technical scheme, the float is used to respond to the change of liquid level in the container, so that the switch can be automatically controlled to open or close the suction port. The structure is simple and reliable, the response is fast, no electric control is required, no frequent maintenance is required, and it has better safety.

[0013] As a further feature, the floating body comprises a hollow floating ball or a hollow buoy structure. The floating body structure adopting the floating ball or buoy structure has better stability.

[0014] As a further feature, the connecting member includes a connecting rod, which can be movably inserted into a guide bracket, the guide bracket is fixed to the inner wall of the container, one end of the connecting rod is connected to the floating body, and the other end is connected to the switch. The floating body and the switch are connected by a connecting rod, and the length of the connecting rod can be selected and set according to the actual needs of the pipeline working pressure. The set length of the connecting rod will affect the height of the first position, ensuring that a sufficiently large volume of compressed air can be formed in the container to meet the pipeline pressure requirements of different working conditions.

[0015] As a further feature, the switch element comprises a valve plate, the valve plate can be matched with the air intake port, and a sealing pair is provided between the valve plate and the air intake port. The switch element has a simple structure and good stability and sealing performance.

[0016] As a further feature, the pipe connection port of the container is connected with an elbow connecting pipe. By providing the elbow connecting pipe, the peak pressure when the pipeline water pressure generates a positive pressure wave impact can be reduced, and the impact effect of the water pressure on the container can be reduced, which can play a certain protective role.

[0017] As a further feature, a dustproof filter cover is installed on the container and covers the outer end of the air inlet opening. The dustproof filter cover can prevent external impurities and debris from entering the container through the air inlet opening, thereby avoiding water pollution.

[0018] As a further feature, the pipeline pressure-stabilizing pressure tank further comprises a pressure detection device connected to the inner cavity of the container. The pressure detection device can monitor the pressure in the container in real time to ensure safety.

[0019] As a further feature, the container is provided with a safety valve connected to its inner cavity, which can be opened when the pressure in the inner cavity of the container exceeds a preset value, and then closed after releasing the pressure to the outside, thereby ensuring the safety of the equipment operation.

[0020] As a further feature, the pipeline pressure-stabilizing pressure tank further comprises a liquid level monitoring device connected to the container. The liquid level in the pressure tank can be observed in real time through the liquid level monitoring device, so that people can monitor and know whether the operation of the pressure tank is normal.

[0021] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0022] The pipeline pressure-stabilizing pressure tank of the present invention has a certain amount of water in the container during the normal water delivery operation of the pipeline, and the liquid level control switch keeps the air intake port normally closed. Since the container is closed, the air in the inner cavity of the container cannot be discharged, and a pressure air mass is formed in the container, which can balance the pressure fluctuation in the water delivery pipeline. When the pipeline pressure increases, water will flow into the container to continue to squeeze the air mass, and the air mass can offset the impact of the water, and the pipeline pressure will decrease. Under the action of the air mass pressure, water will be replenished into the pipeline, so that the negative pressure generated in the pipeline can be eliminated at the source, playing a role in protecting against water hammer. Compared with the water hammer elimination tank, the pipeline pressure-stabilizing pressure tank has no inner liner and no risk of inner liner rupture, but the ability to reduce pressure and replenish water in the pipeline is still very strong, and the structure is simple and the reliability is high; and compared with the pressure regulating tower, the pipeline pressure-stabilizing pressure tank has a pressurized air mass, and the ability to reduce pressure and replenish water is greatly improved, and it can have a smaller volume and height. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a pipeline pressure-stabilizing pressure tank in an embodiment when the air suction port is closed;

[0024] Figure 2 It is a structural schematic diagram of a pipeline pressure-stabilizing pressure tank in an embodiment with the air intake port opened.

[0025] Description of labels:

[0026] 1-container, 11-air intake port, 12-pipeline connection port, 13-tank body, 14-top cover, 15-elbow connecting pipe, 16-dust filter cover; 2-liquid level control switch device, 21-switch member, 22-float, 23-connecting rod, 24-guide bracket; 3-pressure detection device; 4-safety valve; 5-liquid level detection device, a-first position. DETAILED DESCRIPTION

[0027] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.

[0028] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention.

[0029] At the same time, the terms such as "upper", "lower", "left", "right", "middle" etc. cited in this specification are only for the convenience of description, and are not used to limit the scope of implementation. Changes or adjustments in their relative relationships should also be regarded as the scope of implementation of the present invention without substantially changing the technical content. In addition, in addition to being used to indicate orientation or positional relationships, some of the above terms may also be used to express other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so as to describe the embodiments of the present application described herein.

[0031] like Figure 1-2 As shown, a pipeline pressure-stabilizing pressure tank of this embodiment is mainly used in water pipelines. When the water in the pipeline generates pressure fluctuations, it can balance the pressure, replenish water in the pipeline when the pressure drops, and buffer and offset the positive pressure when the pressure rises, thereby playing a role in water hammer protection. It is worth noting that the pressure tank is not limited to water pipelines. In other fields of pipeline transportation of liquids or liquid mixtures, if there is a pressure fluctuation of the fluid medium, the pressure tank can also be used to protect against pressure shock.

[0032] The pipeline pressure-stabilizing pressure tank comprises a container 1 and a liquid level control switch device 2, wherein the container 1 is provided with an air suction port 11 and a pipeline connection port 12 connected to its inner cavity, the pipeline connection port 12 is used to be directly or indirectly connected to a water pipeline, and the position of the air suction port 11 is higher than the pipeline connection port 12. The liquid level control switch device 2 is arranged in the inner cavity of the container 1, when the liquid level height in the container 1 is above a first position a, the liquid level control switch device 2 keeps the air suction port 11 normally sealed and closed, and when the liquid level height in the container 1 is lower than the first position a, the liquid level control switch device 2 opens the air suction port. It is worth noting that the first position a is not a fixed position, but a concept indicating the critical position of the liquid level control switch device 2 to open and close the air intake port. It can be flexibly set according to different actual working conditions. However, the first position a is located between the height difference between the air intake port 11 and the pipeline connecting port 12. In this way, when the liquid level in the container 1 is higher than the first position a, the air intake port 11 remains normally closed, and a compressed air mass will be formed in the inner cavity of the container 1 above the liquid level. The compressed air mass can buffer the positive pressure generated in the water pipeline, and can also squeeze and replenish water when the pressure of the water pipeline drops. In addition, according to different working conditions, the pipeline operating pressure is different. Therefore, in order to balance the pipeline operating pressure, on the pipeline with high operating pressure, a pressure tank is required to provide a compressed air mass with a larger volume and pressure, while on the pipeline with low pressure, the pressure and volume of the compressed air mass can be smaller. Therefore, the specific position of the first position a can be flexibly selected and set.

[0033] In this embodiment, the container 1 is a hollow structure of normal pressure or pressure-bearing. The specific material of the container 1 is not limited. The container 1 can be an integrally formed structure, or an integral structure formed by welding, casting, etc., or a structure in which two or more separate parts are assembled together by screws to form an integral structure. Figure 1 The schematic diagram of the structure of a pipeline pressure-stabilizing pressure tank is shown, the container 1 includes a tank body 13, the top and bottom of the tank body 13 are provided with flange openings, the top flange opening can be used as a manhole, the top of the tank body 13 is fixedly connected to the top cover 14, the air intake port 11 is provided on the top cover 14, the flange opening at the bottom of the tank body 13 is the pipeline connecting port 12, and a ladder can also be fixedly connected to the outer wall of the tank body 13. The container 1 is convenient for production and processing, and is also convenient for installation and maintenance of internal parts.

[0034] The liquid level control switch device 2 in this embodiment is a device that performs a switch action in response to the change of the liquid level in the inner cavity of the container 1, as long as the liquid level control switch device 2 can keep the air suction port 11 normally closed when the liquid level reaches above the preset first position a, and open the air suction port 11 when the liquid level is lower than the first position a. It can be understood that the liquid level control switch device 2 can be a device that generates mechanical linkage with the change of the liquid level to control the switch of the air suction port 11, or a device that generates electrical control with the change of the liquid level to open or close the air suction port 11, both of which are within the protection scope of the present invention.

[0035] like Figure 1 The structural schematic diagram of a pipeline pressure-stabilizing pressure tank shown in the figure provides a preferred implementation of a liquid level control switch device 2, wherein the liquid level control switch device 2 includes a switch element 21 and a float 22, and is a device that generates mechanical linkage with changes in the liquid level to control the switching of the suction port 11.

[0036] Among them, the switch member 21 is arranged at the air inlet opening 11 for opening or closing the air inlet opening 11. The material and shape of the switch member 21 are not limited, as long as it can close the air inlet opening 11 when it cooperates with the air inlet opening 11. For example, the switch member 21 includes a valve plate, which can cooperate with the air inlet opening 11. The shape and size of the valve plate are adapted to the air inlet opening 11, and a sealing pair can be arranged between the valve plate and the air inlet opening 11. The sealing pair can include a rubber sealing ring arranged on the valve plate and / or the inner wall of the air inlet opening 11, so as to ensure the sealing of the valve plate when closing the air inlet opening 11. The switch member 21 has a simple structure and good stability and sealing.

[0037] The float 22 is placed in the inner cavity of the container 1 and connected to the switch 21 through a connector. When the float 22 rises to above the first position a along with the liquid level in the container 1, the float 22 links the switch 21 to close the air intake port 11. When the float 22 drops to below the first position a along with the liquid level, the float 22 links the switch 21 to open the air intake port 11. The float 22 can be a hollow floating ball or a hollow buoy structure. The float 22 with a floating ball or buoy structure has better structural stability. Of course, the float 22 can also be other components that can float with the liquid surface and have sufficient structural strength, as long as it can meet the condition that it will not be deformed or damaged when the pipeline working pressure changes. Since there is a certain height difference between the floating body 22 and the switch element 21, the floating body 22 and the switch element 21 need to be connected by a connecting piece, which can be a connecting rod 23. The material of the connecting rod 23 is not limited, as long as it has sufficient structural strength. The connecting rod 23 can be movably inserted on the guide bracket 24, and the guide bracket 24 is fixed to the inner wall of the container 1. One end of the connecting rod 23 is connected to the floating body 22, and the other end is connected to the switch element 21. The set length of the connecting rod 23 will affect the height of the first position a. Therefore, the length of the connecting rod 23 can be selected and set according to the actual needs of the pipeline working condition pressure, as long as it can ensure that a sufficiently large volume of compressed air mass can be formed in the container 1 to meet the pipeline pressure requirements of different working conditions.

[0038] According to the liquid level control switch device 2 of this embodiment, the float 22 is used to respond to the liquid level changes in the container 1, and the switch component 21 can be automatically controlled to open or close the suction port 11. It has a simple and reliable structure, a quick response, no need for electric control, no need for frequent maintenance, and better safety.

[0039] According to the pipeline pressure-stabilizing pressure tank with the liquid level control switch of this embodiment, the working principle and technical effect thereof are explained by example. Figure 2 As shown, when the pipeline pressure-stabilizing pressure tank is used in a water pipeline system, the pipeline connecting port 12 is connected to the water pipeline, and when the water pump fills water into the pipeline, the water in the pipeline enters the container 1 through the pipeline connecting port 12; Figure 1As shown, when the float 22 rises to the first position a with the liquid level, the switch 21 also rises and closes the air intake port 11. After that, the air intake port 11 is normally sealed and closed, and the gas in the container 1 cannot be discharged. As the gas is continuously compressed, a pressure gas mass is formed in the container 1. During the operation of the pipeline, when the water flow generates a pressure drop wave, under the action of the pressure gas mass, the water in the container 1 will be squeezed into the pipeline by the pressure, eliminating the pressure drop of the pipeline water flow and preventing the generation of pressure drop / negative pressure water hammer. As long as the water level in the container 1 does not drop below the first position a, the air intake port 11 will not be opened, and the pressure gas mass can play a role in squeezing and replenishing water. When the liquid level drops below the first position a, the switch 21 opens the air intake port 11, and the water and gas in the container 1 can also be replenished into the water pipeline to eliminate the negative pressure generated in the water pipeline. When the water flow generates a pressure-boosting wave, container 1 acts as a buffer space. Water can continue to enter container 1 and compress the air mass. The reaction force of the air mass can buffer the positive pressure wave and reduce the pressure peak, thereby preventing pressure-boosting / positive pressure water hammer.

[0040] In some embodiments, the pipe connecting port 12 of the container 1 is also connected to an elbow connecting pipe 15, which is a pipe with a 90° bend and can be connected through a flange. Since the elbow connecting pipe 15 is bent, when the water pressure in the pipeline increases, the pressure wave enters the container 1 through the elbow connecting pipe 15, which can reduce the peak pressure when the pipeline water pressure generates a positive pressure wave impact, reduce the impact effect of the water pressure on the container 1, and can play a certain protective role.

[0041] In some embodiments, the container 1 is also equipped with a dust filter cover 16 covering the outer end of the air intake port 11. The dust filter cover 16 includes a filter screen covering the air intake port. The filter screen can be set in a cylindrical shape. A gland is fixed on the top of the filter screen to cover the air intake port 11. The filter screen is located on the circumferential surface, and the dustproof effect is better. By setting a suitable mesh size, the dust filter cover 16 can prevent external impurities and debris from entering the container 1 through the air intake port 11, thereby avoiding water pollution. The dust filter cover 16 only needs to be able to filter and prevent dust, and the specific installation structure and shape are not limited.

[0042] In some embodiments, the pipeline-stabilized pressure tank also includes a pressure detection device 3 connected to the inner cavity of the container 1. The pressure detection device 3 can be a pressure sensor or a pressure gauge, which is mainly used to detect the pressure in the container 1 to ensure the safe operation of the equipment. The detection end of the pressure detection device 3 is preferably closer to the top of the container 1. In order to facilitate the installation of the pressure detection device 3, a detection tube can be connected from a position close to the top of the container 1, one end of the detection tube extends downward, and a pressure sensor or a pressure gauge can be installed on the detection tube. By setting the pressure detection device 3, the pressure in the container 1 can be monitored in real time to ensure safety.

[0043] In some embodiments, a safety valve 4 connected to the inner cavity of the container 1 is installed on the container 1. The safety valve 4 can be opened when the pressure in the inner cavity of the container 1 exceeds a preset value, and then closed after releasing the pressure to the outside, thereby ensuring the safety of the operation of the equipment.

[0044] In some embodiments, the container 1 of the pipeline pressure-stabilizing pressure tank is also provided with a liquid level monitoring device 5, through which the liquid level in the pressure tank can be observed in real time, so that people can monitor and know whether the operation of the pressure tank is normal. The liquid level monitoring device 5 can be a liquid level meter, such as Figure 1 The liquid level gauge of the pipeline pressure-stabilizing pressure tank shown in the figure is a magnetic flap liquid level gauge, and its two ends are respectively connected to the top and bottom of the container 1, so that the liquid level height in the container 1 can be visually seen. In some other embodiments, the liquid level monitoring device 5 can also be a liquid level sensor, for example, the liquid level sensor can be any one or more combinations of a magnetostrictive liquid level detector, a photoelectric liquid level sensor, an ultrasonic liquid level sensor, and a float liquid level sensor.

[0045] The terms "installed", "set", "provided with", and "connected" referred to herein should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0046] The present invention and its embodiments are described schematically above, and the description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and designs a structural method and an embodiment similar to the technical solution without creativity without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

Claims

1. A pipeline pressure-stabilizing pressure tank, characterized in that: include: The container (1) is provided with an air intake port (11) and a pipe connection port (12) which are connected to the inner cavity thereof, wherein the air intake port (11) is located higher than the pipe connection port (12); A liquid level control switch device (2) is arranged in the inner cavity of the container (1); when the liquid level in the container (1) is above a first position (a), the liquid level control switch device (2) keeps the air intake port (11) normally sealed and closed; when the liquid level in the container (1) is below the first position (a), the liquid level control switch device (2) opens the air intake port.

2. The pipeline pressure-stabilizing pressure tank according to claim 1, characterized in that: The liquid level control switch device (2) comprises a switch element (21) and a float (22); The switch element (21) is arranged at the air intake opening (11) and is used to open or close the air intake opening (11); The float (22) is placed in the inner cavity of the container (1) and is connected to the switch component (21) via a connecting piece. When the float (22) rises with the liquid level in the container (1) to above a first position (a), the float (22) links with the switch component (21) to close the air intake port (11). When the float (22) drops with the liquid level to below the first position (a), the float (22) links with the switch component (21) to open the air intake port (11).

3. The pipeline pressure-stabilizing pressure tank according to claim 2, characterized in that: The floating body (22) comprises a hollow floating ball or a hollow buoy structure.

4. The pipeline pressure-stabilizing pressure tank according to claim 2, characterized in that: The connecting member comprises a connecting rod (23), the connecting rod (23) being movably inserted into a guide bracket (24), the guide bracket (24) being fixed to the inner wall of the container (1), one end of the connecting rod (23) being connected to the floating body (22), and the other end being connected to the switch member (21).

5. The pipeline pressure-stabilizing pressure tank according to claim 2, characterized in that: The switch element (21) comprises a valve plate, the valve plate can be matched with the air intake port (11), and a sealing pair is provided between the valve plate and the air intake port (11).

6. The pipeline pressure-stabilizing pressure tank according to any one of claims 1 to 5, characterized in that: The pipeline connecting port (12) of the container (1) is connected to an elbow connecting pipe (15).

7. The pipeline pressure-stabilizing pressure tank according to any one of claims 1 to 5, characterized in that: The container (1) is provided with a dustproof filter cover (16) covering the outer end of the air intake opening (11).

8. The pipeline pressure-stabilizing pressure tank according to any one of claims 1 to 5, characterized in that: It also includes a pressure detection device (3) connected to the inner cavity of the container (1).

9. The pipeline pressure-stabilizing pressure tank according to any one of claims 1 to 5, characterized in that: The container (1) is provided with a safety valve (4) connected to its inner cavity.

10. The pipeline pressure-stabilizing pressure tank according to any one of claims 1 to 5, characterized in that: It also comprises a liquid level monitoring device (5) connected to the container (1).

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