Pipeline pressure stabilizing type pressure tank

Abstract

The utility model 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 utility model relates to water pipeline system technical field more specifically, relate to a pipeline pressure stabilizing type pressure tank. BACKGROUND

[0002] Generally, in the water pipe system, when the pump stops suddenly or the valve closes suddenly, etc. The transient state of rapid change of flow and pressure will appear, which is called water hammer. When water hammer occurs, due to the sudden change of flow in the pipe, the propagation of pressure wave, the pressure in the pipe rises rapidly, or the pressure in the pipe drops, the pipeline may collapse or be damaged due to the shock wave.

[0003] In order to prevent the problem of water hammer damage, a water hammer elimination tank or a water hammer protection device such as a two-way pressure regulating tower is generally provided in the pump water pipeline system to supplement water to the pipeline or absorb the excessive pressure in the pipeline, so as to reduce the water hammer phenomenon caused by the change of fluid flow in the pipeline.

[0004] In the prior art, the water hammer elimination tank is usually a pressure tank with an inner container, which can offset the pressure fluctuation of the water entering the capsule inner container by pre-charging compressed gas, so as to have smaller volume and height under the same pipeline pressure condition compared with the normal pressure regulating tower. However, the capsule inner container has the risk of capsule rupture when absorbing the positive pressure of the pipeline, and the entering pipeline needs to be designed to have a throttling energy dissipation function to reduce the positive pressure peak. Whether it is a pressure regulating tower or a water hammer elimination tank, other valves or accessories are needed to realize its function, and its application site is also limited by certain factors. UTILITY MODEL CONTENTS

[0005] The utility model provides a pipeline pressure stabilizing type pressure tank, which aims to overcome the above-mentioned problems existing in the prior art.

[0006] In order to achieve the above-mentioned purpose, the technical scheme provided by the utility model is as follows:

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

[0008] A container is provided with an air inlet hole and a pipeline communication port communicating with the inner cavity thereof, and the position of the air inlet hole is higher than that of the pipeline communication 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 the first position, the liquid level control switch device keeps the air inlet hole normally sealed and closed, when the liquid level height in the container is below the first position, the liquid level control switch device opens the air inlet hole.

[0010] The pipeline pressure stabilizing pressure tank is communicated with the water delivery pipeline through a pipeline communication port. When water in the pipeline enters the container and reaches above the first position height, the liquid level control switch device closes the air suction port, air in the container cannot be discharged, a pressure air mass can be formed in the inner cavity of the container, pressure fluctuation in the water delivery pipeline can be balanced, and water hammer damage of the pipeline can be prevented. The pressure tank has no inner container, is low in cost, high in safety, and good in water hammer prevention performance.

[0011] Further, the liquid level control switch device comprises a switch part and a float. The switch part is arranged at the air suction port for opening or closing the air suction port. The float is arranged in the inner cavity of the container and connected with the switch part through a connecting part. When the float rises with the liquid level in the container to above the first position, the float links the switch part to close the air suction port. When the float drops with the liquid level below the first position, the float links the switch part to open the air suction port.

[0012] Through the above technical scheme, the float responds to the liquid level change in the container, the switch part can be automatically controlled to open or close the air suction port, the structure is simple and reliable, response is rapid, electric control is not needed, frequent maintenance is not needed, and better safety is achieved.

[0013] Further, the float comprises a hollow floating ball or a hollow floating cylinder structure. The floating ball or the floating cylinder structure has better stability.

[0014] Further, the connecting part comprises a connecting rod, the connecting rod is movably inserted on a guide support, the guide support is fixed to the inner wall of the container, one end of the connecting rod is connected with the float, and the other end of the connecting rod is connected with the switch part. The connecting rod connects the float and the switch part, the length of the connecting rod can be selected and set according to actual needs of pipeline working pressure, the length of the set connecting rod affects the height of the first position, sufficient compressed air mass can be formed in the container to meet pipeline pressure requirements of different working conditions.

[0015] Further, the switch part comprises a valve plate, the valve plate can be matched with the air suction port, and a sealing pair is arranged between the valve plate and the air suction port. The switch part has simple structure, good stability and good sealing performance.

[0016] Further, the pipeline communication port of the container is connected with an elbow connecting pipe. The elbow connecting pipe can slow down the peak pressure when the water pressure of the pipeline produces a positive pressure wave impact, slow down the impact effect of the water pressure on the container, and has a certain protection effect.

[0017] As further, the container is provided with a dustproof filter cover covering the outer end of the air suction hole, which prevents impurities and sundries from entering the container through the air suction hole, thereby avoiding water pollution.

[0018] As further, the pipeline pressure stabilizing pressure tank further comprises a pressure detection device connected to the inner cavity of the container.

[0019] As further, the container is provided with a safety valve connected to the inner cavity of the container.

[0020] As further, the pipeline pressure stabilizing pressure tank further comprises a liquid level monitoring device connected to the container.

[0021] Compared with the prior art, the technical scheme has the following beneficial effects:

[0022] The pipeline pressure stabilizing pressure tank has a certain amount of water in the container during normal water conveying operation of the pipeline, and the liquid level control switch keeps the air suction hole normally closed. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 FIG. 1 is a structure schematic view of a pipeline pressure stabilizing pressure tank in a closed state of an air suction hole according to an embodiment of the present application;

[0024] Figure 2 FIG. 2 is a structure schematic view of a pipeline pressure stabilizing pressure tank in an open state of an air suction hole according to an embodiment of the present application.

[0025] LABEL EXPLANATION

[0026] 1 - container, 11 - air inlet, 12 - pipeline communication port, 13 - tank, 14 - top cover, 15 - elbow connecting pipe, 16 - dustproof filter cover; 2 - liquid level control switch device, 21 - switch part, 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 application, the present application will be described in detail in combination with the drawings and examples.

[0028] The structure, proportion, size and the like shown in the drawings of the present application are only used to cooperate with the content disclosed in the description, for understanding and reading by those skilled in the art, and are not used to limit the implementation conditions of the present application, so they do not have substantial technical significance. Any modification of structure, change of proportion relationship or adjustment of size, without affecting the effects and purposes that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application.

[0029] At the same time, the terms such as "upper", "lower", "left", "right", "middle" and the like referred to in the present specification are only for the convenience of clear description, and are not used to limit the implementation range, and the change or adjustment of the relative relationship is also considered as the implementation range of the present application without substantial change of technical content. Moreover, in addition to being used to indicate the orientation or position relationship, the above-mentioned terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. For ordinary skilled persons in the art, the specific meanings of these terms in the present application can be understood according to the specific circumstances.

[0030] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein.

[0031] As Figures 1-2 shown, the pipeline pressure stabilizing pressure tank of the present embodiment is mainly applied to a water conveying pipeline, and can balance the pressure when the water in the pipeline produces pressure fluctuation, supplement water into the pipeline when the pressure drops, and buffer and offset the positive pressure when the pressure rises, thereby playing a water hammer protection role. It should be noted that the pressure tank is not limited to be applied to the water conveying pipeline, and in other liquid or liquid mixture pipeline conveying fields, if there is fluid medium pressure fluctuation, the pressure impact can also be protected by the pressure tank.

[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 orifice 11 and a pipeline communication port 12, the pipeline communication port 12 is used for direct or indirect communication with the water conveying pipeline, and the air suction orifice 11 is located higher than the pipeline communication port 12. The liquid level control switch device 2 is arranged in the inner cavity of the container 1, and when the liquid level in the container 1 is higher than the first position a, the liquid level control switch device 2 keeps the air suction orifice 11 normally sealed and closed, and when the liquid level in the container 1 is lower than the first position a, the liquid level control switch device 2 opens the air suction orifice. It is worth noting that the first position a is not a fixed position, but a concept representing the critical position of the liquid level control switch device 2 opening and closing the air suction orifice, which can be flexibly set according to different actual working conditions, but the first position a is located between the height difference between the air suction orifice 11 and the pipeline communication port 12, so that when the liquid level in the container 1 is higher than the first position a, the air suction orifice 11 is normally closed, and a compressed gas group is formed in the inner cavity of the container 1 above the liquid level, which can buffer the positive pressure generated in the water conveying pipeline and can extrude water when the pressure of the water conveying pipeline decreases. In addition, the pipeline operating pressure is different according to different working conditions, so in order to balance the pipeline operating pressure, a larger volume and pressure of the compressed gas group needs to be provided by the pressure tank on the pipeline with large operating pressure, and the pressure and volume of the compressed gas group can be smaller on the pipeline with small pressure, so the specific position of the first position a can be flexibly selected and set.

[0033] In the embodiment, the container 1 is a hollow structure under normal pressure or pressure-bearing, and the specific material of the container 1 is not limited. The container 1 can be an integrally formed structure, an integral structure processed by welding, casting or the like, or a structure formed by assembling two or more separate components together by using threaded parts. Referring to the structural schematic view of a pipeline pressure stabilizing pressure tank shown in the drawing, the container 1 comprises a tank body 13, the top and bottom of the tank body 13 are provided with flange openings, the flange opening at the top can be used as a manhole, the top of the tank body 13 is fixedly connected with a top cover 14, the air suction orifice 11 is arranged on the top cover 14, and the flange opening at the bottom of the tank body 13 is the pipeline communication port 12. The outer wall of the tank body 13 can also be fixedly connected with a ladder. The container 1 is convenient for production and processing, and also convenient for installation and maintenance of internal parts. Figure 1

[0034] ​In this embodiment, the liquid level control switch 2 is a device that responds to changes in the liquid level inside the container 1 by switching on and off. It is sufficient that the liquid level control switch 2 can keep the suction port 11 normally closed when the liquid level reaches or exceeds a preset first position a, and open the suction port 11 when the liquid level is below the first position a. It is understood that the liquid level control switch 2 can be a device that mechanically controls the opening and closing of the suction port 11 in response to changes in the liquid level, or it can be a device that electrically controls the opening or closing of the suction port 11 in response to changes in the liquid level; both are within the scope of protection of this utility model.

[0035] like Figure 1 The schematic diagram of a pipeline pressure-stabilizing pressure tank shows a preferred embodiment of the liquid level control switch device 2. The liquid level control switch device 2 includes a switch element 21 and a float 22, and is the aforementioned device that generates mechanical linkage with changes in liquid level to control the switching of the air intake port 11.

[0036] The switch element 21 is located at the intake port 11 and is used to open or close the intake port 11. The material and shape of the switch element 21 are not limited, as long as it can cooperate with the intake port 11 to close the intake port 11. For example, the switch element 21 includes a valve plate that can cooperate with the intake port 11. The shape and size of the valve plate are adapted to the intake port 11, and a sealing pair can be provided between the valve plate and the intake port 11. The sealing pair may include a rubber sealing ring provided on the valve plate and / or the inner wall of the intake port 11, thereby ensuring the sealing performance of the valve plate when the intake port 11 is closed. This switch element 21 has a simple structure and good stability and sealing performance.

[0037] The float 22 is placed in the inner cavity of the container 1 and is connected with the switch piece 21 through a connecting piece. When the float 22 rises with the liquid level in the container 1 to above the first position a, the float 22 links the switch piece 21 to close the air suction orifice 11. When the float 22 drops with the liquid level below the first position a, the float 22 links the switch piece 21 to open the air suction orifice 11. The float 22 can be a hollow floating ball or a hollow floating cylinder structure. The float 22 with the floating ball or floating cylinder 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 the conditions of not being deformed and damaged under the pressure change of the pipeline working condition can be met. Since there is a certain height difference between the float 22 and the switch piece 21, the connecting piece is needed to connect the float 22 and the switch piece 21. The connecting piece can be a connecting rod 23. The material of the connecting rod 23 is not limited and has sufficient structural strength. The connecting rod 23 is movably inserted on a guide bracket 24. The guide bracket 24 is fixed to the inner wall of the container 1. One end of the connecting rod 23 is connected with the float 22, and the other end is connected with the switch piece 21. The 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 pressure. As long as a sufficient volume of compressed gas group can be formed in the container 1 to meet the pipeline pressure demand of different working conditions, the length of the connecting rod 23 can be selected and set.

[0038] The liquid level control switch device 2 according to the embodiment can automatically control the switch piece 21 to open or close the air suction orifice 11 in response to the change of the liquid level in the container 1 by using the float 22. The structure is simple and reliable, the response is rapid, no electric control is needed, no frequent maintenance is needed, and better safety is achieved.

[0039] The pipeline pressure stabilizing pressure tank with the liquid level control switch device according to the embodiment is used to illustrate the working principle and technical effects. For example, as shown in Figure 2 When the pipeline pressure stabilizing pressure tank is applied to a water conveying pipeline system, the pipeline communication port 12 is connected with the water conveying pipeline, and the water pump fills water into the pipeline. The water in the pipeline enters the container 1 through the pipeline communication port 12. As shown in Figure 1As shown, when the float 22 rises to the first position a with the liquid level, the switch piece 21 also rises and closes the air inlet hole 11, and thereafter the air inlet hole 11 is normally closed, and the gas in the container 1 cannot be discharged, and as the gas is continuously compressed, a pressure group is formed in the container 1; during pipeline operation, when the water flow generates a pressure drop wave, the water in the container 1 is pressed into the pipeline under the action of the pressure group, eliminating the pressure drop of the pipeline water flow, preventing the generation of pressure drop / negative pressure water hammer, and as long as the water level in the container 1 does not drop below the first position a, the air inlet hole 11 will not be opened, and the pressure group can play a role in pressing the water. When the liquid level drops below the first position a, the switch piece 21 opens the air inlet hole 11, and the water and gas in the container 1 can also be supplemented into the water conveying pipeline to eliminate the negative pressure generated in the water conveying pipeline. When the water flow generates a pressure wave, the container 1 acts as a buffer space, and water can continue to enter the container 1 and compress the gas group, and the reaction force of the gas group can buffer the positive pressure wave, reduce the peak pressure, and thus prevent the generation of pressure wave / positive pressure water hammer.

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

[0041] In some embodiments, the container 1 is also provided with a dustproof filter cover 16 covering the outer end of the air inlet hole 11. The dustproof filter cover 16 includes a filter screen covering the air inlet hole, and the filter screen can be in a cylindrical shape and provided with a gland fixed on the top of the filter screen to cover the air inlet hole 11. The filter screen is located on the circumferential surface, which has a better dustproof effect. By setting a proper mesh size, the dustproof filter cover 16 can prevent external impurities and sundries from entering the container 1 through the air inlet hole 11, thereby avoiding water pollution. The dustproof filter cover 16 only needs to have a filtering and dustproof effect, and the specific installation structure and shape are not limited.

[0042] In some embodiments, the pipeline pressure stabilizing pressure tank also includes a pressure detection device 3 connected with 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 for detecting 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 pipe can be connected from the position close to the top of the container 1, and a pressure sensor or a pressure gauge is installed on the detection pipe. Through 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 is installed on the container 1 and communicates with its inner cavity. The safety valve 4 can open when the pressure in the inner cavity of the container 1 exceeds a preset value, release pressure to the outside, and then close, thereby ensuring the safety of equipment operation.

[0044] In some embodiments, the container 1 of the pipeline pressure-stabilizing pressure tank is further equipped with a liquid level monitoring device 5. The liquid level monitoring device 5 allows for real-time observation of the liquid level in the pressure tank, facilitating monitoring and understanding of whether the pressure tank is operating normally. The liquid level monitoring device 5 can be a level gauge, such as... Figure 1 The liquid level gauge of the pipeline pressure-stabilizing tank shown is a magnetic flap level gauge, with its two ends connected to the top and bottom of container 1 respectively, allowing a direct view of the liquid level in container 1. In some other embodiments, the liquid level monitoring device 5 can also be a liquid level sensor, for example, any one or more combinations of a magnetostrictive liquid level detector, a photoelectric liquid level sensor, an ultrasonic liquid level sensor, and a float-type liquid level sensor.

[0045] The terms “installation,” “setup,” “equipped with,” and “connection” used herein should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0046] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should 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 (11) and a pipe connection (12) communicating with its inner cavity, wherein the air intake (11) is positioned higher than the pipe connection (12); A liquid level control switch device (2) is provided in the inner cavity of the container (1). When the liquid level in the container (1) is above the first position (a), the liquid level control switch device (2) keeps the air intake port (11) sealed and closed under normal conditions. 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) includes a switch element (21) and a float (22); The switch (21) is located at the air intake (11) and is used to open or close the air intake (11); 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 above the first position (a) with the liquid level in the container (1), the float (22) is linked to the switch (21) to close the air intake port (11). When the float (22) falls below the first position (a) with the liquid level, the float (22) is linked to the switch (21) to open the air intake port (11).

3. The pipeline pressure stabilizing pressure tank according to claim 2, characterized in that: The float (22) includes a hollow buoy or a hollow pontoon structure.

4. The pipeline pressure stabilizing pressure tank according to claim 2, characterized in that: The connector includes a connecting rod (23), which is movably inserted into a guide bracket (24). 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 float (22), and the other end is connected to the switch (21).

5. The pipeline pressure stabilizing pressure tank according to claim 2, characterized in that: The switch (21) includes a valve plate that can cooperate 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 1-5, characterized in that: The container (1) has a pipe connection port (12) connected to an elbow connecting pipe (15).

7. The pipeline pressure stabilizing pressure tank according to any one of claims 1-5, characterized in that: The container (1) is equipped with a dust filter cover (16) that covers the outside of the air intake (11).

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

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

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

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