Box-type bidirectional pressure regulating tower for eliminating water hammer

Abstract

The invention provides a water hammer eliminating box type bidirectional 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 of pipeline fluctuation, the control valve, the upper tower body and the lower tower body are arranged, the two functions of overpressure pressure relief and low-pressure pressure supplement are achieved, the water hammer protection effect can be greatly improved, and the water hammer eliminating box type two-way pressure regulating tower is suitable for popularization and application. The size of a water hammer protection facility is reduced, and engineering investment is reduced.

Description

Technical Field

[0001] The invention belongs to the field of pipeline water transportation, and in particular relates to a water hammer elimination box-type bidirectional pressure regulating tower. Background Art

[0002] In the prior art, water hammer protection for pipeline water delivery systems can be roughly divided into two types according to the water hammer protection function: "overpressure relief" and "low-pressure supplementation". General water hammer protection facilities only have one function, and the functions of "overpressure relief" and "low-pressure supplementation" require different functional facilities, which not only occupy a large space and require a large engineering investment, but also are complicated and inconvenient to install and use. Summary of the invention

[0003] In view of this, the present invention aims to propose a water hammer elimination box-type bidirectional pressure regulating tower to solve the problems of single function of water hammer protection facilities in the prior art, large space occupied by functional components to meet usage requirements, and high engineering investment.

[0004] To achieve the above object, the technical solution of the present invention 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, wherein the lower tower body is connected to a main pipeline, an upper tower body is arranged above the lower tower body, and a water supply valve flap is arranged on the lower tower body, the water supply valve flap 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, 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 arranged on the water replenishment valve disc, and the central axis is rotatably sleeved on 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, one end of the pressure relief valve disc can be sealed and connected to an inner ring at one end of the pressure relief channel, the other end of the pressure relief valve disc is installed in the control component through a shaft rod, and a control chamber is arranged in the control component, the control chamber is connected to the pressure relief channel through a 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 a 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 arranged 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 arranged at one end of the spring, and a support rod is arranged 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 arranged 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, the reflux chamber is connected to the upper tower body through the second channel, and the reflux pipe can be connected to the second channel through the reflux chamber.

[0012] Furthermore, a water tank is arranged 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 present invention has the following beneficial effects: it can be installed at the position 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 pipeline. Through the configuration of the control valve, the upper tower body and the lower tower body, it has the 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 engineering investment. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] Figure 1 It is a front view structural schematic diagram of a water hammer elimination box-type bidirectional pressure regulating tower according to an embodiment of the present invention;

[0017] Figure 2 It is a side structural schematic diagram of a water hammer elimination box-type bidirectional pressure regulating tower according to an embodiment of the present invention;

[0018] Figure 3 It is a schematic cross-sectional structure diagram of a water hammer elimination box-type bidirectional pressure regulating tower according to an embodiment of the present invention;

[0019] Figure 4 for Figure 3A 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 in the embodiments may 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 positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like 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 the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

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

[0026] like Figure 1-Figure 4As shown, a water hammer elimination box-type bidirectional pressure regulating tower comprises 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 replenishment valve disc 11 is arranged on the lower tower body 1. The water replenishment 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. The pressure relief channel can be installed at a position where a 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 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 engineering investment.

[0027] A central axis 13 is arranged 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, and the heavy hammer 12 can provide the initial opening and closing power for the water supply valve disc 11, such as Figure 3 As shown, 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 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, the other end of the pressure relief valve flap 32 is installed in the control component through the shaft rod 33, and a control chamber is arranged in the control component, the control chamber is connected to the pressure relief channel through the pressure compensation channel 34, and 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, 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 rod 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 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, so as 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 pipeline 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 arranged 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 arranged at one end of the spring 43, and a support rod 45 is arranged 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 plugged 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 arranged 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 greater than the area of ​​the pressure relief valve disc 32.

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

[0034] 2. During the transition process such as stopping the pump, the pressure of the main pipeline 7 drops. When the pressure P1 of the main pipeline 7 is less 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 to prevent the negative pressure damage caused by the pressure drop of the main pipeline 7;

[0035] 3. Water hammer returns, the pressure in the main pipeline 7 rises, and the pressure relief valve flap 32 is closed under the force of the heavy hammer 12; the pressure in the main pipeline 7 exceeds the set pressure, the pressure relief pilot valve 4 opens, the pressure P3 in the upper control chamber 38 is approximately equal to 0, and the pressure relief valve flap 32 opens under the pressure before the valve to release excess medium and prevent the main pipeline 7 from a destructive pressure rise;

[0036] 4. When the pressure in the main pipeline 7 returns to normal pressure, the pressure relief pilot valve 4 is closed, and the water in the main pipeline 7 enters the upper control chamber 38. The pressure P3 in the upper control chamber 38 is equal to 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 two-way pressure regulating tower returns to the initial state;

[0037] 5. The pressure value for starting water replenishment can be achieved by adjusting the force of the heavy hammer 12 and the liquid level height of the upper tower body 2. The smaller the force of the heavy hammer 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 heavy hammer 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 for eliminating 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 substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. Water hammer elimination box-type two-way pressure regulating tower, 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); 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 pressure regulating tower according to claim 1 is characterized in that: A central shaft (13) is arranged on the water replenishment valve flap (11), and the central shaft (13) is rotatably sleeved onto the lower tower body (1), and a weight (12) is fixedly mounted 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) comprises a valve body (31), two ends of the valve body (31) are respectively connected to one end of a pressure relief channel and one end of an upper tower body (2), 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 an inner ring of one end of the pressure relief channel, the other end of the pressure relief valve flap (32) is installed in a control component through a shaft (33), and a control chamber is arranged 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 flap (32) to slide axially through the control component.

4. The water hammer elimination box-type bidirectional pressure regulating tower according to claim 3 is characterized in that: The control component comprises 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 rod (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 rod (33) are fixedly connected.

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

6. The water hammer elimination box-type bidirectional pressure regulating tower according to claim 4, characterized in that: A pressure relief pilot valve (4) is installed on the upper shell (35), a return pipe (41) is arranged on the upper shell (35), and the return pipe (41) is connected to the upper control chamber (38), the pressure relief pilot valve (4) comprises 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 arranged at one end of the spring (43), a support rod (45) is arranged 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), 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), 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 7, 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); and 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 pressure regulating tower according to claim 1, characterized in that: A water tank (5) is arranged 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 a water inlet end of the drain pipe (6) is located at the upper part of the upper tower body (2).

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