Box-type bidirectional pressure regulating tower for eliminating water hammer

Abstract

The utility model provides a water hammer elimination box type two-way pressure regulating tower which comprises a lower tower body, an upper tower body and a control valve, the lower tower body is communicated to a main pipeline, the upper tower body is arranged above the lower tower body, the lower tower body is provided with a water replenishing valve clack, the water replenishing valve clack is used for connecting and disconnecting a passage between the upper tower body and the lower tower body, one side of the lower tower body is provided with a pressure relief channel, and the pressure relief channel is communicated with the control valve. A control valve is installed on the pressure relief channel, the pressure relief channel can be communicated with the upper tower body through the control valve, and medium pressure in the pressure relief channel can control on-off of the control valve. The water hammer eliminating box type two-way pressure regulating tower can be installed at the position where a water column can be snapped in the transition process, such as the starting point of a pump station outlet water collecting pipe and the hump position where a pipeline fluctuates, and through the arrangement of the control valve, the upper tower body and the lower tower body, the water hammer eliminating box type two-way pressure regulating tower has the two functions of overpressure pressure relief and low-pressure pressure supplement. The water hammer protection effect can be greatly improved, the size of a water hammer protection facility is reduced, and engineering investment is reduced.

Description

Technical Field

[0001] The utility model belongs to the field of pipeline water transportation, in particular to a box-type bidirectional pressure regulating tower for eliminating water hammer. Background Art

[0002] Water hammer protection for existing pipeline water supply systems can be broadly categorized into two types based on their function: overpressure relief and underpressure boosting. Typical water hammer protection devices only perform one function, requiring separate devices for each. This not only occupies a large space and requires significant engineering investment, but is also complex and inconvenient to install and use. Utility Model Content

[0003] In view of this, the utility model aims to propose a water hammer elimination box-type bidirectional pressure regulating tower to solve the problems of the existing water hammer protection facilities having single functions, large space occupied by functional components and high engineering investment in order to meet usage requirements.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the utility model is achieved as follows:

[0005] A water hammer elimination box-type bidirectional pressure regulating tower comprises a lower tower body, an upper tower body and a control valve. The lower tower body is connected to a main pipeline. The upper tower body is arranged above the lower tower body, and a water supply valve disc is arranged on the lower tower body. The water supply valve disc is used to open and close the passage between the upper tower body and the lower tower body. A pressure relief channel is arranged on one side of the lower tower body, and a control valve is installed on the pressure relief channel. The pressure relief channel can be connected to the upper tower body through the control valve, and the medium pressure in the pressure relief channel can control the opening and closing of the control valve.

[0006] Furthermore, a central axis is provided on the water supply valve disc, and the central axis is rotatably sleeved onto the lower tower body, and a heavy hammer is fixedly installed on one end of the central axis.

[0007] Furthermore, the control valve includes a valve body, both ends of which are respectively connected to one end of the pressure relief channel and one end of the upper tower body. A pressure relief valve disc is arranged in the valve body, and one end of the pressure relief valve disc can be sealed and connected to the inner ring of one end of the pressure relief channel. The other end of the pressure relief valve disc is installed in the control component through the shaft rod, and a control chamber is provided in the control component. The control chamber is connected to the pressure relief channel through the pressure compensation channel, and the medium pressure in the pressure relief channel can drive the pressure relief valve disc to slide axially through the control component.

[0008] Furthermore, the control component includes an upper shell and a lower shell, and a diaphragm is installed between the upper shell and the lower shell, an upper control chamber is provided between the upper end of the diaphragm and the interior of the upper shell, a lower control chamber is provided between the lower end of the diaphragm and the lower shell, and a limiting hole is provided on the lower shell, the outer periphery of the shaft rod is slidably connected to the limiting hole, the interior of the valve body is connected to the lower control chamber, the upper control chamber is connected to the pressure relief channel through the pressure compensation channel, a pressure plate is installed on the diaphragm, and the pressure plate and the shaft rod are fixedly connected.

[0009] Furthermore, the outer diameter of the diaphragm is greater than the outer diameter of the pressure relief valve disc.

[0010] Furthermore, a pressure relief pilot valve is installed on the upper shell, a return pipe is provided on the upper shell, and the return pipe is connected to the upper control chamber, the pressure relief pilot valve includes a pressure relief shell, the outlet end of the return pipe is connected to the pressure relief shell, a spring is installed in the pressure relief shell, a piston is provided at one end of the spring, and a support rod is provided at one end of the piston, a valve needle is installed at one end of the support rod, the end of the valve needle can be plugged into the inner edge of the outlet end of the return pipe, the valve needle is used to open and close the passage between the return pipe and the pressure relief shell, a partition plate is installed on the periphery of the support rod, the periphery of the partition plate is slidably connected to the inner ring of the pressure relief shell, a pressure relief control chamber is provided between one end of the piston and the partition plate, and the pressure relief control chamber is connected to the pressure relief channel through the first channel.

[0011] Furthermore, a reflux chamber is provided at the bottom of the pressure relief shell, and the reflux chamber is connected to the upper tower body through the second channel. The reflux pipe can be connected to the second channel through the reflux chamber.

[0012] Furthermore, a water tank is provided on one side of the upper tower body, and the interior of the water tank is connected to the upper tower body.

[0013] Furthermore, a drain pipe is installed on the upper tower body, and the water inlet end of the drain pipe is located at the upper part of the upper tower body.

[0014] Compared with the prior art, the water hammer elimination box-type bidirectional pressure regulating tower described in the utility model has the following beneficial effects: it can be installed at the location where the water column will be broken during the transition process, such as the starting point of the water collection pipe at the outlet of the pump station and the hump of the undulating pipeline. Through the configuration of the control valve, the upper tower body and the lower tower body, it has two functions of "overpressure relief" and "low-pressure replenishment", which can greatly improve the water hammer protection effect, reduce the volume of water hammer protection facilities, and reduce project investment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 This is a front view structural diagram of a water hammer elimination box-type bidirectional surge tower according to an embodiment of the present utility model;

[0017] Figure 2 This is a side structural diagram of a water hammer elimination box-type bidirectional surge tank according to an embodiment of the present utility model;

[0018] Figure 3 This is a schematic cross-sectional structure diagram of a water hammer elimination box-type bidirectional surge tower according to an embodiment of the present utility model;

[0019] Figure 4 for Figure 3 A partial enlarged view of middle A.

[0020] Description of reference numerals:

[0021] 1-lower tower body; 11-water supply valve disc; 12-weight; 13-middle axis; 2-upper tower body; 3-control valve; 31-valve body; 32-pressure relief valve disc; 33-shaft; 34-pressure supply channel; 35-upper shell; 36-lower shell; 37-diaphragm; 38-upper control chamber; 39-lower control chamber; 310-pressure plate; 4-pressure relief pilot valve; 41-return pipe; 42-pressure relief shell; 43-spring; 44-piston; 45-support rod; 46-partition plate; 47-valve needle; 48-pressure relief control chamber; 49-first channel; 410-return chamber; 411-second channel; 5-water tank; 6-drain pipe; 7-main pipeline; 8-pressure relief pipeline. DETAILED DESCRIPTION

[0022] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0024] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0025] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0026] like Figure 1-Figure 4 As shown, a water hammer elimination box-type bidirectional pressure regulating tower includes a lower tower body 1, an upper tower body 2 and a control valve 3. The lower tower body 1 is connected to the main pipeline 7. The upper tower body 2 is arranged above the lower tower body 1, and a water supply valve disc 11 is arranged on the lower tower body 1. The water supply valve disc 11 is used to open and close the passage between the upper tower body 2 and the lower tower body 1. A pressure relief channel is arranged on one side of the lower tower body 1, and a control valve 3 is installed on the pressure relief channel. The pressure relief channel can be connected to the upper tower body 2 through the control valve 3, and the medium pressure in the pressure relief channel can control the opening and closing of the control valve 3. It can be installed at a location where the water column will be broken during the transition process, such as the starting point of the water collection pipe at the outlet of the pump station or the hump of the pipeline. Through the configuration of the control valve 3, the upper tower body 2 and the lower tower body 1, it has two functions of "overpressure relief" and "low-pressure replenishment", which can greatly improve the water hammer protection effect, reduce the volume of water hammer protection facilities, and reduce project investment.

[0027] A central axis 13 is provided on the water supply valve disc 11, and the central axis 13 is rotatably sleeved on the lower tower body 1, and a heavy hammer 12 is fixedly installed at one end of the central axis 13. The heavy hammer 12 can provide the initial opening and closing power for the water supply valve disc 11. Figure 3 As shown, the control valve 3 includes a valve body 31, both ends of the valve body 31 are respectively connected to one end of the pressure relief channel and one end of the upper tower body 2, and a pressure relief valve flap 32 is arranged in the valve body 31, one end of the pressure relief valve flap 32 can be sealed and connected to the inner ring of one end of the pressure relief channel, and the other end of the pressure relief valve flap 32 is installed in the control component through the shaft 33, and a control chamber is provided in the control component, which is connected to the pressure relief channel through the pressure compensation channel 34. The medium pressure in the pressure relief channel can drive the pressure relief valve flap 32 to slide axially through the control component.

[0028] The control assembly includes an upper shell 35 and a lower shell 36, and a diaphragm 37 is installed between the upper shell 35 and the lower shell 36. An upper control chamber 38 is provided between the upper end of the diaphragm 37 and the interior of the upper shell 35, and a lower control chamber 39 is provided between the lower end of the diaphragm 37 and the lower shell 36. A limiting hole is provided on the lower shell 36, and the outer periphery of the shaft rod 33 is slidably connected to the limiting hole. The interior of the valve body 31 is connected to the lower control chamber 39, and the upper control chamber 38 is connected to the pressure relief channel through the pressure compensation channel 34. A pressure plate 310 is installed on the diaphragm 37, and the pressure plate 310 is fixedly connected to the shaft rod 33. The outer diameter of the diaphragm 37 is larger than the outer diameter of the pressure relief valve disc 32 to ensure that the lower medium pressure provided by the upper control chamber 38 to the diaphragm 37 is higher than the upper medium pressure provided by the pressure relief pipe 8 to the pressure relief valve disc 32.

[0029] A pressure relief pilot valve 4 is installed on the upper shell 35. A return pipe 41 is provided on the upper shell 35, and the return pipe 41 is connected to the upper control chamber 38. The pressure relief pilot valve 4 includes a pressure relief shell 42. The outlet end of the return pipe 41 is connected to the pressure relief shell 42. A spring 43 is installed in the pressure relief shell 42. A piston 44 is provided at one end of the spring 43, and a support rod 45 is provided at one end of the piston 44. A valve needle 47 is installed at one end of the support rod 45. The end of the valve needle 47 can be inserted into the inner edge of the outlet end of the return pipe 41. The valve needle 47 is used to open and close the passage between the return pipe 41 and the pressure relief shell 42. A partition plate 46 is installed on the periphery of the support rod 45. The periphery of the partition plate 46 is slidably connected to the inner ring of the pressure relief shell 42. A pressure relief control chamber 48 is provided between one end of the piston 44 and the partition plate 46. The pressure relief control chamber 48 is connected to the pressure relief channel through the first channel 49.

[0030] A reflux chamber 410 is provided at the bottom of the pressure relief shell 42, and the reflux chamber 410 is connected to the upper tower body 2 through the second channel 411. The reflux pipe 41 can be connected to the second channel 411 through the reflux chamber 410. A water tank 5 is provided on one side of the upper tower body 2, and the interior of the water tank 5 is connected to the upper tower body 2. A drain pipe 6 is installed on the upper tower body 2, and the water inlet end of the drain pipe 6 is located at the upper part of the upper tower body 2.

[0031] Working principle of water hammer elimination box-type two-way pressure regulating tower:

[0032] During implementation, the pressure in the main pipeline 7 is P1, the pressure in the upper tower body 2 is P2, the pressure in the pressure relief valve control chamber is P3, and the area of ​​the diaphragm 37 is larger than the area of ​​the pressure relief valve disc 32.

[0033] 1. During normal operation, the pressure P1 in the main pipeline 7 is greater than the pressure P2 in the upper tower body 2. Due to the force of the weight 12, the pressure relief valve disc 32 is closed. The pressure relief pilot valve 4 is closed, the pressure P3 in the upper control chamber 38 is equal to the pressure P1 in the main pipeline 7, and the area of ​​the diaphragm 37 is larger than that of the pressure relief valve disc 32. The pressure relief valve disc 32 disconnects the passage between the pressure relief pipeline 8 and the valve body 31.

[0034] 2. During the transient process of stopping the pump, the pressure in the main pipeline 7 drops. When the pressure P1 of the main pipeline 7 is lower than the pressure P2 of the upper tower body 2, the force acting on the water supply valve disc 11 is greater than the force of the weight 12, the water supply valve disc 11 opens, and the water in the upper tower body 2 is replenished into the main pipeline 7, preventing the negative pressure damage caused by the pressure drop of the main pipeline 7;

[0035] 3. When the water hammer returns, the pressure in the main pipeline 7 rises, and the pressure relief valve disc 32 closes under the force of the weight 12. When the pressure in the main pipeline 7 exceeds the set pressure, the pressure relief pilot valve 4 opens, and the pressure P3 in the upper control chamber 38 is approximately equal to 0. The pressure relief valve disc 32 opens under the pressure upstream of the valve, releasing excess medium and preventing a destructive pressure rise in the main pipeline 7.

[0036] 4. When the pressure in the main pipeline 7 returns to normal, the pressure relief pilot valve 4 closes, and the water in the main pipeline 7 enters the upper control chamber 38. The pressure P3 in the upper control chamber 38 equals the pressure P1 in the main pipeline 7. The area of ​​the diaphragm 37 is larger than the area of ​​the pressure relief valve disc 32. The pressure relief valve disc 32 disconnects the passage between the pressure relief pipeline 8 and the valve body 31. At this time, the water hammer is eliminated and the box-type bidirectional pressure regulating tower returns to its initial state.

[0037] 5. The pressure value for starting water replenishment can be achieved by adjusting the force of the weight 12 and the liquid level of the upper tower body 2. The smaller the force of the weight 12, the higher the liquid level of the upper tower body 2, and the greater the pressure value for starting water replenishment; the greater the force of the weight 12, the lower the liquid level of the upper tower body 2, and the smaller the pressure value for starting water replenishment;

[0038] 6. The relief pressure value can be achieved by adjusting the spring 43 of the pressure relief pilot valve 4. The greater the force of the spring 43, the greater the relief pressure value, and the smaller the force of the spring 43, the smaller the relief pressure value;

[0039] 7. When the initially designed water replenishment volume is insufficient, it can be compensated by increasing the volume of the water tank 5 connected to the upper tower body 2 of the box-type two-way pressure regulating tower to eliminate water hammer;

[0040] 8. When the main pipeline 7 is over-pressured and the discharged water volume exceeds the loading capacity of the upper tower body 2 and the water tank 5 of the water hammer elimination box-type two-way pressure regulating tower, the excess water can be discharged through the drain pipe 6.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. Water hammer elimination box-type bidirectional surge tank, characterized by: The invention comprises a lower tower body (1), an upper tower body (2) and a control valve (3); the lower tower body (1) is connected to a main pipeline (7); the upper tower body (2) is arranged above the lower tower body (1); and a water supply valve flap (11) is arranged on the lower tower body (1); the water supply valve flap (11) is used to open and close the passage between the upper tower body (2) and the lower tower body (1); a pressure relief channel is arranged on one side of the lower tower body (1); a control valve (3) is installed on the pressure relief channel; the pressure relief channel can be connected to the upper tower body (2) through the control valve (3), and the medium pressure in the pressure relief channel can control the opening and closing of the control valve (3).

2. The water hammer elimination box-type bidirectional surge tower according to claim 1, characterized in that: A central shaft (13) is provided on the water supply valve disc (11), and the central shaft (13) is rotatably sleeved onto the lower tower body (1), and a heavy hammer (12) is fixedly installed on one end of the central shaft (13).

3. The water hammer elimination box-type bidirectional pressure regulating tower according to claim 1, characterized in that: The control valve (3) includes a valve body (31), two ends of the valve body (31) are respectively connected to one end of the pressure relief channel and one end of the upper tower body (2), a pressure relief valve disc (32) is arranged in the valve body (31), one end of the pressure relief valve disc (32) can be sealed and connected to the inner ring of one end of the pressure relief channel, the other end of the pressure relief valve disc (32) is installed in the control component through a shaft (33), and a control chamber is provided in the control component, the control chamber is connected to the pressure relief channel through a pressure compensation channel (34), and the medium pressure in the pressure relief channel can drive the pressure relief valve disc (32) to slide axially through the control component.

4. The water hammer elimination box-type bidirectional pressure regulating tower according to claim 3, characterized in that: The control assembly includes an upper shell (35) and a lower shell (36), and a diaphragm (37) is installed between the upper shell (35) and the lower shell (36), an upper control chamber (38) is provided between the upper end of the diaphragm (37) and the interior of the upper shell (35), a lower control chamber (39) is provided between the lower end of the diaphragm (37) and the lower shell (36), and a limiting hole is provided on the lower shell (36), the outer periphery of the shaft (33) is slidably connected to the limiting hole, the interior of the valve body (31) is connected to the lower control chamber (39), the upper control chamber (38) is connected to the pressure relief channel through the pressure compensation channel (34), a pressure plate (310) is installed on the diaphragm (37), and the pressure plate (310) and the shaft (33) are fixedly connected.

5. The water hammer elimination box-type bidirectional pressure regulating tower according to claim 4, characterized in that: The outer diameter of the diaphragm (37) is larger than the outer diameter of the pressure relief valve disc (32).

6. The water hammer elimination box-type bidirectional pressure regulating tower according to claim 4, characterized in that: The pressure relief pilot valve (4) is installed on the upper shell (35), a return pipe (41) is provided on the upper shell (35), and the return pipe (41) is connected to the upper control chamber (38), the pressure relief pilot valve (4) includes a pressure relief shell (42), the outlet end of the return pipe (41) is connected to the pressure relief shell (42), a spring (43) is installed in the pressure relief shell (42), a piston (44) is provided at one end of the spring (43), and a support rod (45) is provided at one end of the piston (44), and a valve needle (45) is installed at one end of the support rod (45). 7), the end of the valve needle (47) can be inserted into the inner edge of the outlet end of the return pipe (41), the valve needle (47) is used to open and close the passage between the return pipe (41) and the pressure relief shell (42), a partition plate (46) is installed on the periphery of the support rod (45), and the periphery of the partition plate (46) is slidably connected to the inner ring of the pressure relief shell (42), and a pressure relief control chamber (48) is provided between one end of the piston (44) and the partition plate (46), and the pressure relief control chamber (48) is connected to the pressure relief channel through the first channel (49).

7. The water hammer elimination box-type bidirectional pressure regulating tower according to claim 6, characterized in that: A reflux chamber (410) is provided at the bottom of the pressure relief shell (42). The reflux chamber (410) is connected to the upper tower body (2) through a second channel (411). The reflux pipe (41) can be connected to the second channel (411) through the reflux chamber (410).

8. The water hammer elimination box-type bidirectional surge tank according to claim 1, characterized in that: A water tank (5) is provided on one side of the upper tower body (2), and the interior of the water tank (5) is connected to the upper tower body (2); A drain pipe (6) is installed on the upper tower body (2), and the water inlet end of the drain pipe (6) is located at the upper part of the upper tower body (2).

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