Constant-pressure water replenishing device with bag type surge tank

Abstract

A constant-pressure water replenishing device with a bag type surge tank comprises the bag type surge tank, two water replenishing pumps and a control box. An inlet of the bag type surge tank is connected with the first end of a water inlet pipeline and further connected with the first end of a pressure relief pipeline, an outlet of the bag type surge tank is connected with inlets of the two make-up pumps through pipelines respectively, outlets of the two make-up pumps are both connected with the first end of a water make-up pipeline, and the first end of the water make-up pipeline is connected with the first end of the pressure relief pipeline. And a water level detection device and an automatic exhaust valve are arranged on the bag type surge tank. By adopting the bag type surge tank, the volume utilization rate of the tank body can reach more than 90%, and the volume and the height are greatly reduced. Wherein when one pump breaks down, the other pump can be switched to operate. When the system has an accident and a large amount of water leakage occurs, the pressure sensor can detect that the pressure of the system pipeline is rapidly reduced, and the two make-up pumps are simultaneously started to make up water emergently, so that the water make-up efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of physics, in particular to a constant-pressure water replenishing device, in particular to a constant-pressure water replenishing device with a bladder-type pressure-stabilizing tank. Background Art

[0002] In a closed water circulation system, a constant pressure water replenishment unit is generally used to replenish water to the system pipeline. The constant pressure water replenishment unit is a kind of pressure-stabilizing water replenishment unit and is widely used. In the prior art, the constant pressure water replenishment unit also has the following defects:

[0003] 1. The constant pressure water replenishment unit adopts a constant pressure tank. This constant pressure tank adopts an ordinary floor-standing expansion water tank. The expansion and contraction volume is achieved by the contraction and expansion of the capsule. The effective usable volume of the tank is only 20% to 30% of the total volume of the tank. The tank is relatively large, which is not convenient for the installation and layout of the unit equipment.

[0004] 2. The constant pressure water supply unit is only equipped with one water supply pump. If the pump fails, the water supply unit cannot operate normally.

[0005] 3. The constant pressure water replenishment unit draws water directly from the water tank. The water contains a lot of gas. Manual exhaust is often required when the water pump is running, causing great difficulties in operation and maintenance.

[0006] 4. The parts of the constant pressure water supply unit need to be transported to the site and then installed on site, which increases the difficulty of construction.

[0007] 5. Replenish water to the system pipeline through the water tank and water pump. There are liquid level sensors in the water tank. Generally, there is a certain distance between the water tank and the water pump and the control cabinet, which leads to a lag in signal transmission. Furthermore, the failure rate of long-distance cable transmission is relatively high. Summary of the invention

[0008] The purpose of the utility model is to provide a constant-pressure water replenishing device with a bladder-type pressure-stabilizing tank. The constant-pressure water replenishing device with a bladder-type pressure-stabilizing tank is to solve the technical problems in the prior art that the volume of the water replenishing tank is relatively large, a pump cannot operate normally after a failure, and manual exhaust is cumbersome.

[0009] The utility model discloses a constant-pressure water replenishing device with a bladder-type pressure-stabilizing tank, comprising a bladder-type pressure-stabilizing tank, two water replenishing pumps, and a control box; the inlet of the bladder-type pressure-stabilizing tank is connected to the first end of a water inlet pipe, and a water inlet solenoid valve and a safety valve are sequentially arranged on the water inlet pipe along the flow direction; the inlet of the bladder-type pressure-stabilizing tank is also connected to the first end of a pressure relief pipe, and a pressure relief solenoid valve is arranged on the pressure relief pipe; the outlet of the bladder-type pressure-stabilizing tank is respectively connected to the inlet of the two water replenishing pumps through a pipe, and the outlets of the two water replenishing pumps are both connected to the first end of a water replenishing pipe, and a pressure sensor is arranged on the water replenishing pipe; the bladder-type pressure-stabilizing tank is provided with a water level detection device and an automatic exhaust valve;

[0010] The control box is provided with a controller, and the control ends of the water replenishment pump, the water inlet solenoid valve, the pressure relief solenoid valve, the pressure sensor, and the signal output end of the water level detection device are all connected to the controller.

[0011] Furthermore, the water level detection device is a water level sensor.

[0012] Furthermore, the water level detection device is installed at the bottom of the bladder type pressure stabilizing tank.

[0013] Furthermore, the automatic exhaust valve is installed on the top of the bladder-type pressure-stabilizing tank.

[0014] Furthermore, it also includes an equipment base, the water supply pump and the control box are fixed on the equipment base, a pipe bracket is provided on the equipment base, and the water inlet pipe and the pressure relief pipe are installed on the pipe bracket.

[0015] Furthermore, a bracket is provided at the bottom of the bladder-type pressure-stabilizing tank, and horizontal adjustment bolts are respectively provided on both sides of the bracket.

[0016] Compared with the prior art, the utility model has positive and obvious effects.

[0017] 1. The utility model adopts a bladder type pressure stabilizing tank, which sets the expansion part and the air pressure stabilizing part separately. There is no air between the bladder and the tank body. After the bladder is filled with water and expanded, it is close to the inner wall of the tank body, which can make the volume utilization rate of the tank body reach more than 90%, greatly reduce the volume and height, save 50% to 60% of land, facilitate equipment layout and installation, and save the civil construction cost of the machine room.

[0018] 2. The utility model sets two water supply pumps, and when one pump fails, the other pump can be switched to operate. When a large amount of water leakage occurs in the system, the pressure sensor can detect the rapid decrease in the system pipeline pressure, and start the two water supply pumps for emergency water supply at the same time, thereby accelerating the water supply efficiency.

[0019] 3. Since the solubility of gas in normal pressure water is lower than that in high pressure water, when the high pressure water in the system pipeline enters the bladder type pressure regulating tank through the pressure relief pipe, the excess gas will be precipitated from the water, and these gases will be discharged through the automatic exhaust valve. Then the water supply pump will pump the treated water back to the system pipeline. Under the high pressure environment, the gas content in these waters will be unsaturated, so that they can absorb the free gas in the system pipeline again, and the automatic exhaust effect can be achieved through such a process.

[0020] 4. The utility model integrates the constant pressure water replenishing device with a bladder type pressure stabilizing tank through the equipment base and the pipe bracket. After the whole device is transported to the site, it only needs to connect the water inlet and outlet and the power supply through the metal flexible connection.

[0021] 5. The control box, water level sensor, pressure sensor and bladder-type pressure-stabilizing tank are integrated together and are close to each other, which reduces signal lag and prevents long-distance cable transmission failures. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The utility model is a schematic diagram of the principle of a constant pressure water replenishing device with a bladder type pressure stabilizing tank.

[0023] Figure 2 The utility model is a structural schematic diagram of a constant pressure water replenishing device with a bladder type pressure stabilizing tank. DETAILED DESCRIPTION

[0024] The present invention is further described below in conjunction with an embodiment, but the present invention is not limited to the embodiment. Any similar structure and similar changes of the present invention should be included in the protection scope of the present invention. The use of directions such as up, down, front, back, left, and right in the present invention is only for the convenience of clear description and is not a limitation on the technical solution of the present invention.

[0025] like Figure 1 and Figure 2 As shown, a constant-pressure water replenishment device with a bladder-type pressure-stabilizing tank of the utility model comprises a bladder-type pressure-stabilizing tank 1, two water replenishment pumps 2, and a control box 3; the inlet of the bladder-type pressure-stabilizing tank 1 is connected to the first end of a water inlet pipe 4, and a water inlet solenoid valve 5 and a safety valve 6 are sequentially arranged on the water inlet pipe 4 along the flow direction; the inlet of the bladder-type pressure-stabilizing tank 1 is also connected to the first end of a pressure relief pipe 7, and a pressure relief solenoid valve 8 is arranged on the pressure relief pipe 7; the outlet of the bladder-type pressure-stabilizing tank 1 is respectively connected to the inlet of the two water replenishment pumps 2 through a pipe, and the outlets of the two water replenishment pumps 2 are both connected to the first end of a water replenishment pipe 9, and a pressure sensor 10 is arranged on the water replenishment pipe 9; a water level detection device 11 and an automatic exhaust valve 12 are arranged on the bladder-type pressure-stabilizing tank 1; a controller is arranged in the control box 3, and the control ends of the water replenishment pump 2, the water inlet solenoid valve 5, and the pressure relief solenoid valve 8, the pressure sensor 10, and the signal output end of the water level detection device 11 are all connected to the controller.

[0026] Furthermore, the water level detection device 11 is a water level sensor.

[0027] Furthermore, the water level detection device 11 is installed at the bottom of the bladder type pressure stabilizing tank 1 .

[0028] Furthermore, the automatic exhaust valve 12 is installed on the top of the bladder type pressure stabilizing tank 1 .

[0029] Furthermore, it also includes an equipment base 13 , the water supply pump 2 and the control box 3 are fixed on the equipment base 13 , a pipe bracket 14 is provided on the equipment base 13 , and the water inlet pipe 4 and the pressure relief pipe 7 are installed on the pipe bracket 14 .

[0030] Furthermore, a bracket is provided at the bottom of the bladder-type pressure-stabilizing tank 1, and horizontal adjustment bolts 15 are respectively provided on both sides of the bracket.

[0031] Specifically, the bladder type pressure stabilizing tank 1 is a prior art, which generally includes a tank body made of metal or plastic, and an inflatable bladder bag is arranged inside. A closed space is formed between the bladder bag and the tank body, and this space can be connected to the circulating water system through a specific interface. When the system pressure rises above the set value, the excess water will flow into the bladder type pressure stabilizing tank 1, causing the bladder bag to expand and compress the air between the tank body and the bladder bag, thereby playing a role in buffering the pressure. Conversely, when the system pressure decreases, the bladder bag will shrink, releasing the water inside it back into the system to maintain the stability of the system pressure.

[0032] Specifically, the bladder-type pressure-stabilizing tank 1, water supply pump 2, water inlet solenoid valve 5, safety valve 6, pressure sensor 10, water level detection device 11, automatic exhaust valve 12, controller, etc. in this embodiment all adopt well-known solutions in the prior art, which are well understood by those skilled in the art and will not be described in detail here.

[0033] The working principle of this embodiment:

[0034] During operation, the second end of the water supply pipe 9 and the second end of the pressure relief pipe 7 are both connected to the system pipeline 16, and the second end of the water inlet pipe 4 is connected to the water source. The pressure sensor 10 is used to detect the pressure of the system pipeline 16. Under the control of the controller, when the pressure of the system pipeline 16 is too low, the water supply pump 2 injects the water in the bladder-type pressure-stabilizing tank 1 into the system pipeline 16 until the pressure of the system pipeline 16 returns to the set value. When the pressure of the system pipeline 16 is too high, the pressure relief solenoid valve 8 is opened, and the water in the system pipeline 16 flows into the bladder-type pressure-stabilizing tank 1 through the pressure relief pipe 7 until the pressure of the system pipeline 16 returns to the set value. The water level detection device 11 is used to detect the water level in the bladder-type pressure-stabilizing tank 1. If the water level in the bladder-type pressure-stabilizing tank 1 drops below the set value, the water inlet solenoid valve 5 is opened to replenish water through the water inlet pipe 4 until the water level in the bladder-type pressure-stabilizing tank 1 reaches the set upper limit, and then the water inlet solenoid valve 5 is closed. The safety valve 6 is used to detect the pressure in the bladder type pressure-stabilizing tank 1. When the pressure exceeds the limit value, the safety valve 6 automatically releases the pressure.

[0035] Advantages of the utility model:

[0036] 1. The utility model adopts a bladder type pressure stabilizing tank 1, which sets the expansion part and the air pressure stabilizing part separately. There is no air between the bladder and the tank body. After the bladder is filled with water and expanded, it is close to the inner wall of the tank body, so that the volume utilization rate of the tank body can reach more than 90%, the volume and height are greatly reduced, and the land is saved by 50% to 60%, which is convenient for equipment layout and installation, and saves the civil construction cost of the machine room.

[0037] 2. The utility model sets two water replenishment pumps 2, and when one pump fails, the other pump can be switched to operate. When a large amount of water leakage occurs in the system, the pressure sensor 10 detects that the pressure of the system pipeline 16 drops rapidly, and the controller starts the two water replenishment pumps 2 for emergency water replenishment at the same time, thereby accelerating the water replenishment efficiency.

[0038] 3. Since the solubility of gas in normal pressure water is lower than that in high pressure water, when the high pressure water in the system pipeline 16 enters the bladder type pressure regulating tank 1 through the pressure relief pipe 7, the excess gas will be precipitated from the water, and these gases will be discharged through the automatic exhaust valve 12. Then the water supply pump 2 will pump the treated water back to the system pipeline 16. Under the high pressure environment, the gas content in these waters will be unsaturated, so that they can adsorb the free gas in the system pipeline 16 again, and the automatic exhaust effect can be achieved through such a process.

[0039] 4. The utility model integrates the constant pressure water replenishing device with the bladder type pressure stabilizing tank through the equipment base 13 and the pipe support 14. After the whole device is transported to the site, it only needs to connect the water inlet and outlet and the power supply through the metal flexible connection.

[0040] 5. The control box 3, the water level sensor, the pressure sensor 10, and the bladder-type pressure-stabilizing tank 1 are all integrated together and are relatively close to each other, which reduces signal lag and prevents long-distance cable transmission failures.

Claims

1. A constant pressure water replenishing device with a bladder type pressure stabilizing tank, characterized in that: It includes a bladder-type pressure-stabilizing tank, two water-making pumps, and a control box; the inlet of the bladder-type pressure-stabilizing tank is connected to the first end of a water inlet pipe, and a water inlet solenoid valve and a safety valve are sequentially arranged on the water inlet pipe along the flow direction; the inlet of the bladder-type pressure-stabilizing tank is also connected to the first end of a pressure relief pipe, and a pressure relief solenoid valve is arranged on the pressure relief pipe; the outlet of the bladder-type pressure-stabilizing tank is respectively connected to the inlet of the two water-making pumps through a pipe, and the outlets of the two water-making pumps are both connected to the first end of a water-making pipe, and a pressure sensor is arranged on the water-making pipe; the bladder-type pressure-stabilizing tank is provided with a water level detection device and an automatic exhaust valve; a controller is arranged in the control box, and the control ends of the water-making pump, the water inlet solenoid valve, the pressure relief solenoid valve, the pressure sensor, and the signal output end of the water level detection device are all connected to the controller.

2. A constant pressure water replenishing device with a bladder type pressure stabilizing tank according to claim 1, characterized in that: The water level detection device is a water level sensor.

3. A constant pressure water replenishing device with a bladder type pressure stabilizing tank according to claim 1, characterized in that: The water level detection device is installed at the bottom of the bladder type pressure stabilizing tank.

4. A constant pressure water replenishing device with a bladder type pressure stabilizing tank according to claim 1, characterized in that: The automatic exhaust valve is installed on the top of the bladder type pressure stabilizing tank.

5. The constant pressure water replenishing device with a bladder type pressure stabilizing tank according to claim 1, characterized in that: It also includes an equipment base, the water supply pump and the control box are fixed on the equipment base, a pipe bracket is arranged on the equipment base, and the water inlet pipe and the pressure relief pipe are installed on the pipe bracket.

6. A constant pressure water replenishing device with a bladder type pressure stabilizing tank according to claim 1, characterized in that: A bracket is arranged at the bottom of the bladder-type pressure-stabilizing tank, and horizontal adjustment bolts are respectively arranged on both sides of the bracket.

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