Water hammer eliminating tank and water conveying pipeline system
The water hammer elimination tank with a linerless design uses a liquid level detection device and a control unit to control the valve and automatically adjust the pipeline pressure, solving the problems of high cost and liner rupture of existing water hammer elimination tanks, and achieving safe and reliable pipeline pressure regulation.
Patent Information
- Application Number
- CN202422671872.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-04
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-11-04
AI Technical Summary
Existing water hammer elimination tanks are costly and pose a risk of inner tank rupture, and cannot effectively alleviate pipeline pressure fluctuations.
The water hammer elimination tank, which adopts a tankless design, controls the opening and closing of valves through a liquid level detection device and a control unit. It also uses the air chamber inside the tank to automatically regulate the pipeline pressure and prevent the inner tank from rupturing.
It achieves automatic response to pipeline pressure fluctuations, reduces costs, improves reliability, avoids inner tank rupture, and ensures pipeline safety.
Smart Images
Figure CN223564017U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to water pipeline technical field especially a kind of water hammer elimination tank and the water pipeline system with the water hammer elimination tank of having. BACKGROUND
[0002] In water pipeline system, when unexpected situation such as sudden pump stop of delivery pump or sudden closing of valve in pipeline occurs, transient state of sharp change of flow and pressure of fluid in pipeline appears, which is called water hammer. When water hammer occurs, sharp change of flow of fluid in pipe causes propagation of pressure wave, leading to rapid rise / fall of pressure in pipe, and even pipe may collapse or be damaged due to pressure wave.
[0003] In order to reduce or avoid loss caused by water hammer hazard, water hammer protection device such as water hammer elimination tank or bidirectional pressure regulating tower is generally arranged in pump water pipeline system, to relieve excessive pressure in pipeline by supplementing pressure to pipeline and absorbing water in pipeline, so as to alleviate water hammer phenomenon caused by sharp change of flow of fluid in pipeline.
[0004] Among them, the existing water hammer elimination tank is generally a pressure tank with elastic inner container, which can expand and absorb water when external pipeline pressure is too high by pre-charging pressure compression gas between inner container and tank body to extrude elastic inner container, and can supplement water and pressurize to external pipeline when external pipeline pressure is low by compression gas extruding inner container to offset pressure fluctuation of water in external pipeline. However, on the one hand, elastic pressure-bearing material needs to be used for inner container, which is expensive, leading to high cost of water hammer elimination tank, and on the other hand, inner container has risk of rupture and damage when absorbing excessive pressure in pipeline, leading to invalidation of water hammer elimination tank for pipeline protection. SUMMARY
[0005] The utility model provides a kind of water hammer elimination tank and water pipeline system, which aims to overcome the above problems existing in the prior art.
[0006] To achieve this purpose, the utility model adopts the following technical solutions:
[0007] The utility model provides a kind of water hammer elimination tank in the first aspect, including tank body, valve, liquid level detection device and control unit. Among them, tank body has first through-hole and second through-hole, first through-hole is higher than second through-hole, and second through-hole is used to communicate with external pipeline, and tank body is sealed when first through-hole and second through-hole are closed. Valve is arranged corresponding to first through-hole, liquid level detection device is used to detect the liquid level height in tank body, control unit is communicated with liquid level detection device and valve, receives the detection result of liquid level detection device, and according to the detection result of liquid level detection device, control valve opens / closes first through-hole.
[0008] It should be noted that the skilled in the art can understand that the "valve" in the utility model can be any valve structure with the function of opening and closing the first through hole, for example, it can be a single valve structure with the function of opening and closing, or it can also be a valve group structure formed by combining multiple valve structures of the same type or different types, which is not limited here.
[0009] As an optional technical solution, the control unit is configured to: when the liquid level detection device detects that the liquid level in the tank body reaches the first liquid level height, control the valve to close the first through hole; and when the liquid level detection device detects that the liquid level in the tank body is lower than the first liquid level height, control the valve to open the first through hole, and the height of the first liquid level is not higher than the lowest point of the first through hole.
[0010] When the pressure in the external pipeline is too large, the fluid in the external pipeline enters the tank body through the second through hole, the liquid level rises, and the control unit obtains the detection signal of the liquid level detection device in real time or at a fixed time, when the liquid level detection device detects that the liquid level in the tank body rises to the first liquid level height, the control unit generates and sends an instruction to close the first through hole, and the valve receives the instruction sent by the control unit and closes the first through hole. At this time, the first through hole is closed, the second through hole is submerged by the fluid, so that an enclosed air cavity is formed above the liquid level, and the air in the air cavity can be continuously compressed to balance the excess pressure in the pipeline.
[0011] When the pressure in the external pipeline decreases or even negative pressure occurs, the compressed air extrudes the fluid in the tank body, and the fluid quickly flows out through the second through hole to supplement the pressure of the external pipeline, the control unit obtains the detection signal of the liquid level detection device in real time or at a fixed time, when the liquid level detection device detects that the liquid level in the tank body drops below the first liquid level height, the control unit generates and sends an instruction to open the first through hole. The valve receives the instruction sent by the control unit and opens the first through hole, and the gas enters the tank body to ensure the air pressure in the tank body, so that the fluid can continuously flow out to supplement the pressure of the external pipeline.
[0012] Only one liquid level height needs to be detected to realize control of the two cases of external fluid overpressure and pressure reduction, the number of liquid level detection devices is smaller, the cost is saved, and the air pressure in the tank body can be reduced to atmospheric pressure just to introduce external air for pressure compensation, which can maximize the use of the pressure of the compressed air in the tank body, while ensuring that the fluid can continuously and smoothly flow out of the tank body.
[0013] As an optional technical solution, the water hammer elimination tank further comprises a safety valve arranged at the top end of the tank body and communicating with the inside of the tank body. The safety valve can be opened when the pressure in the tank body is too large to release the excessive pressure in the tank body and avoid the tank body from being broken due to excessive pressure.
[0014] As an optional technical solution, the control unit is also in communication connection with the safety valve, and the control unit is further configured to: when the liquid level detection device detects that the liquid level in the tank body reaches a second liquid level height, control the safety valve to open; and when the liquid level detection device detects that the liquid level in the tank body is lower than the second liquid level height, control the safety valve to close, the second liquid level height being greater than the first liquid level height.
[0015] When the pressure in the external pipeline is too large and the first through hole is closed, the liquid level in the tank body still keeps rising, and the air cavity in the tank body is continuously compressed. In this case, if the air pressure in the air cavity in the tank body is too large, it may cause the tank body to overpressure or even rupture. Generally, when the pressure in the tank body exceeds a critical value, the safety valve will automatically open, but the pressure detection in the tank body also has a certain failure risk. On this basis, in order to further ensure the safety of the tank body and avoid the overpressure of the tank body, in combination with the liquid level detection device, when the liquid level detection device detects that the liquid level in the tank body is higher than the second liquid level height, it is considered that the compressed gas pressure in the air cavity has reached the critical value, and the control unit controls the safety valve to open, so that the safety operation of the tank body can be ensured through the double determination of pressure and liquid level height.
[0016] As an optional technical solution, the liquid level detection device includes a liquid level meter arranged on one side outside the tank body, the upper part of the liquid level meter being in communication with the upper part of the tank body, and the lower part of the liquid level meter being in communication with the lower part of the tank body. The liquid level meter can truly reflect the liquid level height in the tank body, and the external liquid level meter enables the user to more intuitively see the liquid level height condition in the tank body.
[0017] As an optional technical solution, the liquid level detection device further includes a liquid level sensor arranged in the tank body or the liquid level meter, which can more accurately detect and send the liquid level height information in the tank body.
[0018] As an optional technical solution, the liquid level sensor is a displacement sensor. The liquid level sensor is any one or a combination of a magnetostrictive liquid level detector, an optical liquid level sensor, an ultrasonic liquid level sensor, and a float ball type liquid level sensor.
[0019] As an optional technical solution, the liquid level detection device further includes a liquid level sensor arranged on the top inner wall of the tank body and / or the liquid level meter, and the emitting end of the liquid level sensor faces downward. Thus, only one liquid level sensor is needed to detect the change of the liquid level in the tank body at multiple heights.
[0020] As an optional technical solution, the valve is an electric butterfly valve, which can more quickly open / close the first through hole in response to the instruction of the control unit.
[0021] The utility model discloses a second aspect still provides a kind of water pipeline system, which has the water hammer elimination tank in the water pipeline system of any technical solution described above.
[0022] The utility model discloses the beneficial effect of:
[0023] According to the water hammer elimination tank and the water pipeline system provided by the utility model, when the pressure in the external pipeline is too large, the fluid in the external pipeline enters the tank body through the second through hole, the liquid level rises, according to the detection result of the liquid level detection device, the control unit can generate and send an instruction to close the first through hole, and the valve receives the instruction sent by the control unit and closes the first through hole. At this time, the first through hole is closed, and the second through hole is flooded by the fluid, so that a closed air cavity is formed above the liquid level, and the air in the air cavity can be continuously compressed to balance the excess pressure in the pipeline.
[0024] When the pressure in the external pipeline decreases or even negative pressure occurs, the compressed air extrudes the fluid in the tank body, the fluid rapidly flows out through the second through hole to supplement the pressure of the external pipeline, the liquid level in the tank body decreases, and according to the detection result of the liquid level detection device, the control unit can generate and send an instruction to open the first through hole. The valve receives the instruction sent by the control unit and opens the first through hole, and the gas enters the tank body to ensure the air pressure in the tank body, so that the fluid can continuously flow out to supplement the pressure of the external pipeline. The water hammer elimination tank can automatically and rapidly respond to the overpressure and pressure reduction of the external pipeline, without manual operation, and due to the adoption of the inner container-free design, the cost is lower, the safety problems such as rupture of the inner container are avoided, and the reliability is higher. BRIEF DESCRIPTION OF DRAWINGS
[0025] Figure 1 is a structure schematic view of a water hammer elimination tank provided by the first embodiment of the utility model.
[0026] Figure 2 is a control module schematic view of the control unit in the second embodiment of the utility model.
[0027] Figures 3-6 is a state change schematic view of a water hammer elimination tank provided by the second embodiment of the utility model.
[0028] Figure 7 is a structure schematic view of a water hammer elimination tank provided by the third embodiment of the utility model.
[0029] Figure 8 is a structure schematic view of a water hammer elimination tank provided by the fourth embodiment of the utility model.
[0030] Figure 9 is a structure schematic view of another water hammer elimination tank provided by the fourth embodiment of the utility model.
[0031] Reference numerals:
[0032] 100-external pipeline;
[0033] 1-tank body; 11-first through hole; 12-second through hole; 13-air cavity; 2-valve; 3-liquid level detection device; 31-liquid level meter; 32-liquid level sensor; 4-control unit; 41-receiving module; 42-comparison module; 43-instruction module; 5-safety valve. DETAILED DESCRIPTION
[0034] The utility model will be described in further detail below in combination with the drawings and examples. It can be understood that the specific examples described herein are only used to explain the utility model and are not limited to the utility model. In addition, it should be noted that only the parts related to the utility model are shown in the drawings for ease of description, not all the structures.
[0035] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0036] In the utility model, unless otherwise explicitly specified and limited, the first feature "on" or "below" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0037] In the description of the embodiment, the terms "up", "down", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the utility model. In addition, the terms "first", "second" are only used to distinguish in description, and have no special meaning.
[0038] First embodiment
[0039] Figure 1 is a structural schematic view of a water hammer elimination tank provided by the first embodiment of the present application. As shown in the figure, the water hammer elimination tank comprises a tank body 1, a valve 2, a liquid level detection device 3 and a control unit 4. The valve 2 is used for controlling the opening and closing of the through hole at the upper part of the tank body 1, the liquid level detection device 3 is used for detecting the liquid level in the tank body 1, and the control unit 4 is in communication connection with the valve 2 and the liquid level detection device 3, and controls the opening and closing of the valve 2 according to the detection structure of the liquid level detection device 3. Figure 1
[0040] Among them, the tank body 1 is a hollow normal pressure or pressure-bearing container, and the material and structure of the tank body 1 are not limited here, and the person skilled in the art can select according to the needs, for example, the tank body 1 can be a cast iron tank body, a stainless steel tank body, a resin tank body, etc., and can also be vertical, horizontal or other irregular shapes, all of which belong to the protection scope of the present application.
[0041] The tank body 1 has a first through hole 11 and a second through hole 12, and the second through hole 12 can be in communication with the external pipeline 100. The setting position, opening shape and size of the first through hole 11 and the second through hole 12 are not limited here, and only the first through hole 11 needs to be higher than the second through hole 12. The figures exemplarily show that the first through hole 11 and the second through hole 12 are both arranged on one side of the tank body 1, which is more convenient for processing and operation of the user.
[0042] In addition, when the first through hole 11 and the second through hole 12 are both closed, the tank body 1 is sealed, and the person skilled in the art can understand that this is not limited to the tank body 1 having only the two openings of the first through hole 11 and the second through hole 12. In other embodiments, the tank body 1 can also have other openings provided with sealing measures. In some embodiments, the tank body 1 can also have an inspection hole provided with a sealing flange. In this case, as long as the first through hole 11 and the second through hole 12 are both closed, the tank body 1 can be sealed. Or in other embodiments, the tank body 1 can also have a safety hole provided with a safety valve, which is normally closed in normal use. As long as the first through hole 11 and the second through hole 12 are both closed, the tank body 1 can be sealed, all of which belong to the protection scope of the present application.
[0043] Generally speaking, when the external pipeline 100 maintains normal pressure, a certain amount of fluid (generally liquid or solid-liquid mixture) is stored in the tank body 1 to submerge the second through hole 12, so as to conveniently supply water to the external pipeline 100 to supplement pressure when the pressure of the external pipeline 100 is reduced. When the first through hole 11 is closed and the second through hole 12 is submerged by the fluid, the air at the upper part of the tank body 1 cannot be discharged, forming a closed air cavity 13 (see the figure). Figure 4
[0044] The valve 2 is arranged corresponding to the first through hole 11, and is used for controlling the opening and closing of the first through hole 11. The valve 2 can be directly arranged at the first through hole 11, or can be arranged on a pipeline extending from the first through hole 11. In the above two cases, the valve 2 can control the opening and closing of the first through hole 11, and belongs to the protection scope of the utility model. In the embodiment, the valve 2 can be any valve 2 structure having the function of opening and closing the first through hole 11, can be a single valve 2 structure having the function of automatic opening and closing (for example, a gate valve, a butterfly valve, an air valve, a check valve, etc.), or can be a valve group structure formed by combination of multiple same type or different type valves (for example, combination of an electrically operated cut-off valve and a check valve, etc.), which is not limited herein. Preferably, the valve 2 can be an electrically operated butterfly valve, which can more quickly open / close the first through hole 11 in response to the instruction of the control unit 4.
[0045] The liquid level detection device 3 is used for detecting the liquid level in the tank body 1. A person skilled in the art can freely select the type of the liquid level detection device 3 according to the needs, for example, can include any one or a combination of multiple of a magnetostrictive liquid level detector, a photoelectric liquid level detector, an ultrasonic liquid level detector, and a float ball type liquid level detector. The liquid level detection device 3 can be arranged outside the tank body 1, so as to facilitate the user to more intuitively observe the liquid level condition in the tank body 1, or in another embodiment, the liquid level detection device 3 can also be arranged inside the tank body 1, which can avoid being damaged by bad weather, and the detection result is more accurate and reliable.
[0046] The control unit 4 is in communication connection with the liquid level detection device 3 and the valve 2. The control unit 4 can be carried on the water hammer elimination tank, or can be separately arranged from the tank body 1, which is not limited herein. The control unit 4 can receive the detection result of the liquid level detection device 3 in real time or at a fixed time, compare the detection result of the liquid level detection device 3 with a preset value, generate a control instruction of “opening the first through hole 11” or “closing the first through hole 11” according to the comparison result, and send the control instruction to the valve 2. After receiving the control instruction, the valve 2 executes the opening or closing of the first through hole 11.
[0047] For example, the control unit 4 stores a preset liquid level value, and the control unit 4 acquires the detection result of the liquid level detection device 3 every 5 seconds. When the detection result of the liquid level detection device 3 is greater than or equal to the preset liquid level value, the control unit 4 generates a control instruction of "closing the first through hole 11" and sends the control instruction to the valve 2. The valve 2 receives the control instruction and closes the first through hole 11. When the detection result of the liquid level detection device 3 is less than the preset liquid level value, the control unit 4 generates a control instruction of "opening the first through hole 11" and sends the control instruction to the valve 2. The valve 2 receives the control instruction and opens the first through hole 11.
[0048] For another example, the control unit 4 stores two preset liquid level values (a first height and a second height, and the size relationship between the two is not limited), and the control unit 4 acquires the detection result of the liquid level detection device 3 every 5 seconds. In the open state of the valve 2, the control unit 4 compares the detection result with the preset first height. When the detection result of the liquid level detection device 3 is greater than or equal to the first height, the control unit 4 generates a control instruction of "closing the first through hole 11" and sends the control instruction to the valve 2. The valve 2 receives the control instruction and closes the first through hole 11. In the closed state of the valve 2, the control unit 4 compares the detection result with the preset second height. When the detection result of the liquid level detection device 3 is less than the second height, the control unit 4 generates a control instruction of "opening the first through hole 11" and sends the control instruction to the valve 2. The valve 2 receives the control instruction and opens the first through hole 11.
[0049] The above two examples of the control process of the control unit 4 belong to the protection scope of the utility model.
[0050] Specifically, in the use process of the water hammer elimination tank provided by the embodiment, when the pressure in the external pipeline 100 is too large, the fluid in the external pipeline 100 enters the tank body 1 through the second through hole 12, and the liquid level rises. According to the detection result of the liquid level detection device 3, the control unit 4 can generate and send an instruction of closing the first through hole 11, and the valve 2 receives the instruction sent by the control unit 4 and closes the first through hole 11. At this time, the first through hole 11 of the tank body 1 is closed, the second through hole 12 is flooded by the fluid, so that an enclosed air cavity 13 is formed above the liquid level, and the air in the air cavity 13 can be continuously compressed by the fluid entering the tank body 1, thereby balancing the excess pressure in the external pipeline 100 until the pressure in the external pipeline 100 returns to normal.
[0051] When the pressure in the external pipeline 100 decreases or even becomes negative, the compressed air in the air cavity 13 in the tank body 1 extrudes the fluid in the tank body 1, and the fluid quickly flows out through the second through hole 12 to supplement the pressure of the external pipeline 100, the liquid level in the tank body 1 is lowered, and according to the detection result of the liquid level detection device 3, the control unit 4 can generate and send an instruction to open the first through hole 11. The valve 2 receives the instruction sent by the control unit 4, and opens the first through hole 11, so that the gas enters the tank body 1, ensures the air pressure in the tank body 1, and enables the fluid to continuously flow out to supplement the pressure of the external pipeline 100 until the pressure of the external pipeline 100 returns to normal.
[0052] In this embodiment, the water hammer elimination tank can automatically respond to the overpressure and pressure reduction of the external pipeline 100 without manual control, which is more convenient, and the cost is lower due to the use of the inner container-free design, the safety problems such as the rupture of the inner container are avoided, and the reliability is higher.
[0053] Second embodiment
[0054] The second embodiment of the utility model provides a more specific control process of the control unit 4 on the basis of the first embodiment.
[0055] Figure 2 It is the control module schematic view of the control unit in the second embodiment of the utility model. In combination with Figure 1 and Figure 2 , the control unit 4 at least includes: receiving module 41, comparison module 42 and instruction module 43. Among them, receiving module 41 is connected with liquid level detection device 3 in communication, for real-time or timing to obtain the detection result H1 of liquid level detection device 3. Comparison module 42 stores the preset first liquid level height H2, for comparing detection result H1 and first liquid level height H2. Instruction module 43 generates control instruction according to the comparison result of comparison module 42, specifically, when the detection result is greater than or equal to the first liquid level height (H1≥H2), sends the control instruction of closing the first through hole 11 to valve 2, when the detection result is less than the first liquid level height (H1<H2), sends the control instruction of opening the first through hole 11 to valve 2.
[0056] In the following, the structural changes of the water hammer elimination tank provided by the embodiment in the water hammer prevention process are described in detail in combination with Figure 1 and Figures 3-6 .
[0057] Specifically, in the use process of the water hammer elimination tank provided by the embodiment, first, as shown in Figure 1 , when the pressure in the external pipeline 100 is too large, the fluid in the external pipeline 100 enters the tank body 1 through the second through hole 12, and the liquid level rises, at this time, the valve 2 keeps the first through hole 11 open. As shown in Figure 3As shown, when the liquid level rises to the first liquid level, the control unit 4 generates and sends an instruction to close the first through hole 11, and the valve 2 receives the instruction sent by the control unit 4 and closes the first through hole 11. At this time, the first through hole 11 is closed, the second through hole 12 is submerged by the fluid, so that an enclosed air cavity 13 is formed above the liquid level, as shown in Figure 4 As shown, the air in the air cavity 13 can be continuously compressed to balance the excess pressure in the pipeline.
[0058] As shown in Figure 4 And Figure 5 As shown, when the pressure in the external pipeline 100 decreases or even negative pressure occurs, the compressed air extrudes the fluid in the tank 1, and the fluid quickly flows out through the second through hole 12 to supplement the pressure of the external pipeline 100, as shown in Figure 5 And Figure 6 As shown, when the liquid level detection device 3 detects that the liquid level in the tank 1 drops below the first liquid level, the control unit 4 generates and sends an instruction to open the first through hole 11, and the valve 2 receives the instruction sent by the control unit 4 and opens the first through hole 11, and the gas enters the tank 1, ensuring the air pressure in the tank 1, so that the fluid can continuously flow out to supplement the pressure of the external pipeline 100.
[0059] In this embodiment, only one liquid level is detected to realize control of the external fluid overpressure and decrease, the number of liquid level detection devices 3 is less, the cost is saved, and the air pressure in the tank 1 can be reduced to atmospheric pressure when the external air is introduced for pressure compensation. The pressure of the compressed air in the tank 1 can be utilized to the maximum extent, and the fluid can continuously and smoothly flow out of the tank 1.
[0060] Third embodiment
[0061] The third embodiment of the utility model further provides a water hammer elimination tank with a safety valve 5 on the basis of the first embodiment or the second embodiment, and the remaining structures are the same as those of the first embodiment or the second embodiment, which will not be repeated here.
[0062] When the pressure in the external pipeline 100 is too large and the first through hole 11 is closed, the liquid level in the tank 1 still rises continuously, and the air cavity 13 in the tank 1 is continuously compressed. In this case, if the air pressure in the air cavity 13 in the tank 1 is too large, the tank 1 may be overpressured or even broken.
[0063] For this purpose, Figure 7 is a structural schematic view of the water hammer elimination tank provided by the third embodiment of the utility model. As shown in Figure 7As shown, the water hammer elimination tank further comprises a safety valve 5 arranged at the top end of the tank body 1 and in communication with the inside of the tank body 1, and the safety valve 5 can be opened when the pressure in the tank body 1 is too large to release the excessive pressure in the tank body 1 and avoid the tank body 1 from being broken due to the excessive pressure.
[0064] Generally, the safety valve 5 will be opened automatically when the pressure in the tank body 1 exceeds the critical value, but there is a certain risk of failure in the pressure detection in the tank body 1. On this basis, in order to further ensure the safety of the tank body 1 and avoid the overpressure of the tank body 1, the control unit 4 is further in communication with the safety valve 5, and further, the control unit 4 is further configured to: when the liquid level detection device 3 detects that the liquid level in the tank body 1 reaches a second liquid level height H3, control the safety valve 5 to open; and when the liquid level detection device 3 detects that the liquid level in the tank body 1 is lower than the second liquid level height H3, control the safety valve 5 to close, and the second liquid level height H3 is greater than the first liquid level height H2.
[0065] In the embodiment, when the liquid level detection device 3 detects that the liquid level in the tank body 1 is higher than the second liquid level height, it is considered that the compressed gas pressure in the air chamber 13 has reached the critical value, and the control unit 4 controls the safety valve 5 to open, so that the safety operation of the tank body 1 can be ensured through the double determination of the pressure and the liquid level height.
[0066] Fourth embodiment
[0067] The fourth embodiment of the utility model provides a water hammer elimination tank structure with more preferred liquid level detection device on the basis of the first embodiment, the second embodiment or the third embodiment, and the rest of the structure is the same as the first embodiment, the second embodiment or the third embodiment, and will not be repeated here.
[0068] Figure 8 It is a structural schematic diagram of a water hammer elimination tank provided by the fourth embodiment of the utility model. As shown, Figure 8 The liquid level detection device comprises a liquid level meter 31 and a liquid level sensor 32. Among them, the liquid level meter 31 is arranged at one side outside the tank body 1, the upper part of the liquid level meter 31 is in communication with the upper part of the tank body 1, the lower part of the liquid level meter 31 is in communication with the lower part of the tank body 1, and the liquid level sensor 32 can be arranged in the tank body, or in some preferred embodiments, the liquid level sensor 32 can be arranged in the liquid level meter 31.
[0069] In the embodiment, the liquid level meter 31 can truly reflect the liquid level height in the tank body 1, and the external liquid level meter 31 enables the user to more intuitively see the liquid level height condition in the tank body 1, and the liquid level sensor 32 arranged in the liquid level meter 31 is also more convenient for maintenance and replacement of the liquid level sensor 32.
[0070] The liquid level sensor 32 can be any one or a combination of magnetostrictive liquid level detector, photoelectric liquid level sensor, ultrasonic liquid level sensor, and float type liquid level sensor. In some preferred embodiments, as shown in FIG. 1, the liquid level sensor 32 can be a photoelectric liquid level sensor or an ultrasonic liquid level sensor, which can be arranged on the inner wall of the top of the tank 1 and / or the liquid level gauge 31 with the emitting end downward. The photoelectric liquid level sensor or the ultrasonic liquid level sensor is more accurate in dynamic monitoring of the rising and falling of the liquid level, can quickly capture the rising and falling of the liquid level, and only one photoelectric liquid level sensor or ultrasonic liquid level sensor is needed to detect all the liquid level changes in the liquid level gauge 31, i.e., the changes of the liquid level in the tank 1 at multiple heights can be obtained. Figure 9
[0071] In other embodiments of the present application, a water pipeline system with the water hammer elimination tank of any one of the above embodiments is also provided.
[0072] For example, the water pipeline system can include a water suction pipe, a pre-pump valve, a water suction pump, a post-pump valve, a water delivery pipe, and a water delivery valve connected in sequence. The second through hole 12 of the water hammer elimination tank is in communication with the downstream of the water suction pump.
[0073] In some cases, for example, in the case of accidental pump stop of the water suction pump, the pressure in the water delivery pipe drops suddenly, the fluid stored in the water hammer elimination tank is supplemented into the water delivery pipe through the second through hole 12 to compensate for the pressure drop caused by the pump stop, and the liquid level in the water hammer elimination tank also continuously decreases. When the liquid level decreases to the first liquid level height H2, the air in the air chamber 13 is almost equal to the atmospheric pressure, the control unit 4 controls the valve 2 to open the second through hole 12, and air is supplemented to ensure that the fluid can be continuously supplied to the water delivery pipe.
[0074] In other cases, for example, in the case of sudden closing of the water delivery valve, the pressure in the water delivery pipe rises suddenly, and the fluid in the water delivery pipe enters the water hammer elimination tank through the second through hole 12 to absorb the pressure increase in the water delivery pipe caused by the sudden closing of the valve, and the liquid level in the water hammer elimination tank also rises. When the liquid level rises to the first liquid level height H2, the control unit 4 controls the valve 2 to close the second through hole 12, and the air chamber 13 inside the tank 1 is formed to be closed, and the subsequent air chamber 13 can be continuously compressed to further absorb the excess pressure in the water delivery pipe.
[0075] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the present application. Here, it is not necessary and also impossible to enumerate all the implementation modes. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application claim.
Claims
1. A water hammer elimination tank, characterized in that, include: The tank (1) has a first through hole (11) and a second through hole (12), the first through hole (11) being higher than the second through hole (12), the second through hole (12) being used to communicate with an external pipeline (100), and the tank (1) being sealed when both the first through hole (11) and the second through hole (12) are closed; A valve (2) is provided corresponding to the first through hole (11); A liquid level detection device (3) is used to detect the liquid level height inside the tank (1); The control unit (4) is communicatively connected to the liquid level detection device (3) and the valve (2), receives the detection result of the liquid level detection device (3), and controls the valve (2) to open / close the first through hole (11) according to the detection result of the liquid level detection device (3).
2. The water hammer elimination tank according to claim 1, characterized in that, The control unit (4) is configured to: When the liquid level detection device (3) detects that the liquid level in the tank (1) has reached the first liquid level height, it controls the valve (2) to close the first through hole (11). When the liquid level detection device (3) detects that the liquid level in the tank (1) is lower than the first liquid level height, it controls the valve (2) to open the first through hole (11). The height of the first liquid level is not higher than the lowest point of the first through hole (11).
3. The water hammer elimination tank according to claim 2, characterized in that, Also includes: A safety valve (5) is located at the top of the tank (1) and is in communication with the inside of the tank (1).
4. The water hammer elimination tank according to claim 3, characterized in that, The control unit (4) is also communicatively connected to the safety valve (5), and the control unit (4) is further configured to: When the liquid level detection device (3) detects that the liquid level in the tank (1) has reached the second liquid level height, it controls the safety valve (5) to open. When the liquid level detection device (3) detects that the liquid level in the tank (1) is lower than the second liquid level height, it controls the safety valve (5) to close. The second liquid level is greater than the first liquid level.
5. The water hammer elimination tank according to any one of claims 1-4, characterized in that, The liquid level detection device includes: a liquid level gauge (31), which is disposed on one side outside the tank (1), the upper part of the liquid level gauge (31) is connected to the upper part of the tank (1), and the lower part of the liquid level gauge (31) is connected to the lower part of the tank (1).
6. The water hammer elimination tank according to claim 5, characterized in that, The liquid level detection device further includes a liquid level sensor (32), which is installed inside the tank (1) or the liquid level gauge (31).
7. The water hammer elimination tank according to claim 6, characterized in that, The liquid level sensor (32) is any one or a combination of magnetostrictive liquid level detector, photoelectric liquid level sensor (32), ultrasonic liquid level sensor (32), and float liquid level sensor (32).
8. The water hammer elimination tank according to claim 5, characterized in that, The liquid level detection device further includes a liquid level sensor (32), which is disposed on the top inner wall of the tank (1) and / or the liquid level gauge (31), and the transmitting end of the liquid level sensor (32) faces downward.
9. The water hammer elimination tank according to any one of claims 1-4, characterized in that, The valve (2) is an electric butterfly valve.
10. A water supply pipeline system, characterized in that, It has a water hammer elimination tank as described in any one of claims 1-9.