TWM584855U - Dual rotor valve driving type pressure reducing valve structure - Google Patents

Abstract

A double-sub valve driven pressure reducing valve structure mainly includes a control mother valve, a first pressure reducing sub valve, and a second pressure reducing sub valve. The first pressure reducing valve and the second pressure reducing valve are connected at both ends. Connected to the primary and secondary sides of the control mother valve respectively for setting different fluid pressure values, where the first pressure reducing sub valve is a detection regulating valve and the second pressure reducing sub valve is low Bypass valve for preventing water pulsation. By using different fluid pressure setting values of the first pressure reducing sub-valve and the second pressure reducing sub-valve, the first pressure reducing sub-valve is used to detect the secondary side water pressure to adjust and control the opening and flow of the mother valve, so that the downstream pipe The feedwater pressure of the road is reduced and the water pressure is kept constant at a preset value. And the second pressure reducing sub-valve is used to urge the control mother valve to close at a small flow rate, and the bypass second sub-valve is used to supply the small flow demand to prevent the control mother valve from generating water pulsation when supplying water at a small flow rate, thereby preventing instantaneous high Water hammer caused by water pressure. As a result, the water supply pipeline not only reduces the water pressure of the downstream pipeline as required and keeps the water pressure constant at a preset value, but also maintains a stable water flow during small water supply without pulsating the water flow, thereby preventing instant high water pressure. Water hammer phenomenon.

Description

Twin valve driven pressure reducing valve structure

This creation is related to a twin-valve-driven pressure reducing valve structure, especially a water supply line that reduces the water supply pressure and keeps the downstream water supply pressure constant at a preset value, and can prevent pulsating water pressure from causing pipeline water hammer. Phenomenon valve-driven pressure reducing valve structure.

According to the previous design of water supply for high-rise buildings, as shown in Figure 5, a water tank 4 is provided at each stage or after a certain height to supply water for each stage. However, due to the complicated piping and high cost of this method, the new building code allows the use of a pressure reducing valve 5 instead of the intermediate water tank 4 to supply water (as shown in Figure 6). However, after the pressure of the water supply pipeline is reduced, if there are many residents in the same pipeline, it is inevitable that there is a period of peak water use and off-peak water use. For example, once only one person uses a small amount of water in the middle of the night, the flow of the pressure reducing valve will flow. When the pressure of the pressure reducing valve is lower than the minimum flow, water pulsation will occur, which will cause strong noise and water hammer effect. Therefore, this sub-valve control type pressure reducing valve must be equipped with a bypass pressure reducing valve to promote the control valve to close. Let the small flow of water only flow through the bypass pressure reducing valve, so that the feedwater pressure can be kept stable and no water pulsation occurs.

Because of the design factors of the conventional pressure reducing valve structure, the valve body of the control mother valve cannot stably control the water flow to a very small range. Therefore, when the control valve is used at a small flow, water pulsation will occur. The situation is as described above, but the bypass pressure reduction The valve piping requires a large space. The pressure setting of the pressure reducing valve and the bypass sub-valve is difficult to adjust and match at the scene. In view of this, the applicant has developed a sub-valve driven pressure reducing valve structure after continuous research and experiments. The sub-valve control type pressure reducing valve is a bypass sub-valve in one body. In addition to achieving the purpose of stable pressure reduction, it can also prevent the water hammer phenomenon caused by the instantaneous pulse water pressure at a small flow rate.

The main purpose of this creation is to provide a twin-valve-driven pressure reducing valve structure to reduce the water supply pressure in the water supply pipeline, and to maintain the constant water pressure at a preset water pressure regardless of the amount of water downstream of the pipeline, and Regardless of the amount of water used, it can prevent the water hammer of the pipeline caused by the instantaneous water pressure pulsation.

The aforementioned dual-valve-driven pressure reducing valve structure includes a control mother valve, a first pressure reducing valve, and a second pressure reducing valve. The two ends of the first pressure reducing valve and the second pressure reducing valve are connected together. Connected to the primary and secondary sides of the control mother valve respectively for setting different fluid pressure values. Among them, the first pressure reducing sub-valve is a detection regulating valve for detecting and controlling the secondary side of the mother valve. Water pressure, and adjust the opening of the control mother valve to make the flow meet the downstream requirements, while the water pressure is still maintained at a preset value. This second pressure reducing valve is a bypass valve for preventing low-water-volume pulsation. Through the operation of the first pressure reducing sub-valve and the second pressure reducing sub-valve at different set pressures, the opening and closing of the control mother valve is driven to maintain the downstream water pressure stably maintained at the set value. And by setting different fluid pressures of the first pressure reducing valve and the second pressure reducing valve, the control mother valve is closed and the second bypass valve is opened in a timely manner at a small flow rate to prevent water flow pulsation during water supply. Prevent water hammer caused by instantaneous high water pressure.

The aforementioned sub-valve driven pressure reducing valve structure, wherein the first pressure reducing valve and the second pressure reducing valve are provided with a body composed of an upper cover, a lower cover and a base, and a primary side passage and On the secondary side channel, a spring, a diaphragm, a shaft center, a valve plug and other components are sequentially arranged inside the body from top to bottom. By using these actuating elements to adjust the fluid flow rate, when the water supply pressure on the secondary side of the control mother valve is lower than the pressure setting value of the first decompression sub-valve, the spring moves the internal components downward synchronously, and the sub-valve is connected to the control valve. The three-way joint on the valve cover drains the water above the diaphragm of the control mother valve, and the diaphragm rises to achieve the function of opening the control mother valve. When the water pressure on the secondary side of the control mother valve is higher than the set pressure of the first sub-valve, the water pressure synchronously displaces these internal components and the sub-valves are closed. The aforementioned three-way joint fills the water above the diaphragm of the control mother valve and compresses it. The diaphragm is lowered to achieve the function of closing the control mother valve. To achieve the purpose of adjusting the secondary side water flow and pressure. When the secondary side of the pressure reducing valve supplies water at a small flow rate, the second pressure reducing valve is set slightly higher than the first pressure reducing valve, so the first pressure reducing valve is closed, and at the same time, the control mother valve is closed, and only the second pressure reducing valve is closed. The pressure reducing valve opens the water supply, so there is no impact of the current pulsation.

Please refer to Figure 1 and Figure 2 at the same time, and cooperate with Figure 3, this is a perspective view of this creation and a sectional view of the pressure reducing valve. As shown in the figure, this creative system includes a control mother valve 1, a first pressure reducing sub valve 2 and a second pressure reducing sub valve 3. Among them, the control mother valve 1 has a primary side 11 (water inlet end) and a secondary side 12 (water outlet end). The two ends of the two pressure reducing sub-valves 2 are respectively connected to the primary side 11 and two of the control mother valve 1. Secondary side 12.

In this embodiment, the first pressure reducing sub-valve 2 is a valve for pressure detection and adjustment control of the opening degree of the mother valve 1, and the second pressure reducing sub-valve 3 is a bypass valve for preventing low-volume pulsation. The first The pressure reducing valve 2 and the second pressure reducing valve 3 are provided with a body composed of an upper cover 21, 31, a lower cover 22, 32, and a base 23, 33. A primary side passage 21 is provided in the lower cover 21, 31. , 311 and secondary side channels 212, 312. Inside the body, a spring 24, 34, a diaphragm 25, 35, an axis 26, 36, and a valve plug 27, 37 are sequentially arranged from top to bottom. The upper covers 21 and 31 are provided with pressure adjusting bolts 28 and 38.

The first pressure reducing sub-valve 2 and the second pressure reducing sub-valve 3 are connected to the primary side 11 and the secondary side 12 of the control mother valve 1 by the primary side channels 211, 311 and the secondary side channels 212, 312, respectively. The pressure setpoints are adjusted appropriately by the pressure adjusting bolts 28 and 38. The secondary side 312 of the second pressure reducing valve 3 is connected in parallel to the three-way joint 6 on the upper cover of the control mother valve 1. When water is controlled at the downstream end of main valve 1 (reducing valve) and the water supply pressure at the secondary side 12 of control valve 1 is lower than the pressure setting value of the first pressure reducing valve 2, the pressure in the first pressure reducing valve 2 is reduced. These components are displaced downward to increase the flow rate, so that the water in the upper cover of the control mother valve 1 is discharged through the three-way joint 6, and thus the diaphragm is opened at the same time to achieve the effect of opening the control mother valve 1. When the water consumption at the downstream end of the control valve 1 (pressure reducing valve) is reduced, the water pressure at the secondary side 12 of the control valve 1 rises above the pressure setting value of the first pressure reducing sub valve 2 to make the first pressure reduction. These components in the sub-valve 2 are shifted upward synchronously to reduce the flow rate, which causes the diaphragm of the control mother valve 1 to drop due to the water in the three-way joint 6, thereby achieving the effect of closing the control mother valve 1.

The combination of the aforementioned components constitutes a sub-valve driven pressure reducing valve structure. The opening degree of the control mother valve 1 is automatically adjusted by the first pressure reducing sub-valve 2 to keep the downstream water pressure fixed at a preset value regardless of the amount of water output. The second pressure reducing valve 3 uses a slightly different pressure setting value than the first pressure reducing valve 2 to automatically close the control valve 1 at a small flow rate, and is opened only by the second pressure reducing valve 3 Water supply to prevent the pulsation of the control mother valve 1 at a small flow rate, and even a water hammer phenomenon caused by instantaneous high water pressure.

Please refer to Figure 4, which is the action state diagram for this creation. As shown in the figure, because the pressure setting values of the first pressure reducing sub valve 2 and the second pressure reducing sub valve 3 connected in parallel to the control mother valve 1 are different, when the water supply pressure on the secondary side 12 of the control mother valve 1 is lower than When the pressure setting value of the second pressure reducing valve 3 is higher than the pressure setting value of the first pressure reducing valve 2, the control mother valve 1 therein cannot be opened, and the required flow is passed by the second pressure reducing valve 3 . When the downstream water demand increases, the pressure of the second pressure reducing valve 3 decreases due to the increase of the flow rate, that is, the pressure of the water supply on the secondary side 12 of the control valve 1 decreases. If the pressure drops to the pressure of the first pressure reducing valve 2 Below the set value, the effect of opening control valve 1 is achieved. This means that the different pressure setting values of the two pressure reducing sub-valves of the first pressure reducing sub-valve 2 and the second pressure reducing sub-valve 3 are used to prevent the control valve 1 from generating water pulsation when the water is supplied at a small flow rate. A water hammer phenomenon of instantaneous high water pressure occurs.

The foregoing embodiments are only for explaining the preferred implementation of the creation, rather than limiting the scope of the creation. Any slight modification or change still retains the essence of the creation and does not depart from the spirit of the creation.

To sum up, in this work, two pressure reducing sub-valves with spring, diaphragm, shaft center and valve plug and other components are connected in parallel to a control mother valve to form a double-valve driving pressure reducing valve structure. It is used to reduce the water supply pressure in the water supply pipeline and keep the water supply pressure downstream of the pipeline constant at a preset value. At the same time, it prevents the control valve from pulsating when supplying water at a small flow rate, and avoids instantaneous high-pressure water hammer. phenomenon. For a practical design, it is a creation of all novelty. The patent application is filed according to law, and the Bureau will examine it, and grant the patent as soon as possible.

‧‧‧ Control mother valve 11‧‧‧ primary side 12‧‧‧ secondary side 2‧‧‧ first pressure reducing valve 21‧‧‧ upper cover 2111‧‧‧ primary side passage 2122‧‧‧ secondary side passage 22‧‧‧ Lower cover 23‧‧‧ Base 24‧‧‧ Spring 25 · ‧‧ Diaphragm 26 · ‧‧ Shaft 27 · ‧‧ Valve plug 28‧‧‧ Pressure regulator bolt 3‧‧‧ Second pressure reducing valve 31 · ‧‧ Upper cover 3111‧‧‧ Primary side channel 3112‧‧‧ Secondary side channel 32‧‧‧ Lower cover 33‧‧‧ Base 34 · ‧‧ Spring 35 · ‧‧ Diaphragm 36‧‧‧ Shaft 37 ‧Valve plug 38‧‧‧Pressure adjustment bolt 4‧‧‧ Water tank 5‧‧‧ Pressure reducing valve 6‧‧‧ Tee joint

Figure 1 is a perspective view of this creation.
Figure 2 is another perspective view of this creation.
Figure 3 is a sectional view of the pressure reducing valve of this creation.
Figure 4 is the action state diagram of this creation.
Fig. 5 is a state diagram of a conventional water tank installation.
Fig. 6 is a state diagram of a conventional pressure reducing valve.

Claims (2)

A double-sub valve driving type pressure reducing valve structure includes a control mother valve, a first pressure reducing sub valve, and a second pressure reducing sub valve, wherein both ends of the first pressure reducing valve and the second pressure reducing valve are It is connected to the primary side and the secondary side of the control mother valve respectively. The first pressure reducing sub valve and the second pressure reducing sub valve are respectively set with different fluid pressure values. Among them, the first pressure reducing sub valve is a detection valve. Measuring the regulating valve, the second pressure reducing sub-valve is a low water volume pulsation preventing bypass valve; the first pressure reducing sub-valve is used to detect the secondary side water pressure and adjust the control mother valve outlet flow to drive the control mother valve Opening and closing to keep the downstream water pressure constant at the preset value, so as to match the constant use pressure required in the water supply pipeline, and to maintain the constant water pressure when supplying small flow water by the second pressure reducing valve to prevent Control the pulsation of the mother valve when supplying water at a small flow rate, thereby preventing water hammer caused by instantaneous high water pressure. According to the structure of the twin-valve driven pressure reducing valve described in item 1 of the scope of patent application, the first pressure reducing valve and the second pressure reducing valve are respectively provided with an upper cover, a lower cover and a base. The main body is provided with a primary side channel and a secondary side channel in the lower cover, and a spring, a diaphragm, a shaft center, a valve plug and other components are sequentially arranged from the top to the bottom of the body; Adjust the flow rate of the fluid. When the downstream side of the control mother valve starts to use the water supply pressure on the secondary side lower than the pressure setpoints of the two pressure reducing sub-valves, these components will be shifted downward synchronously to achieve the effect of opening the control valve to turn on the water supply. When the water pressure on the downstream side of the control mother valve is stopped and the water pressure on the secondary side is higher than the pressure setpoints of the two pressure-reducing sub-valves, the components are shifted upward synchronously to close the control mother valve and stop the water supply.