A weighing automatic air and pressure constant water supply device

Abstract

The utility model discloses a weighing automatic air-filling and constant-pressure water-filling device, which relates to the technical field of constant-pressure water-filling devices, including a water supply trunk, one end of which is connected to a water supply source, a plurality of water supply branches connected to the water supply trunk, a water supply pump arranged on the water supply branch, an end of which is away from the water supply trunk connected to a system water supply pipeline, an end of which is connected to a heating system, a tank connecting pipeline connected to the system water supply pipeline, an end of which is away from the system water supply pipeline connected to a diaphragm air pressure tank, a water inlet and an air charging port arranged on the diaphragm air pressure tank, a water bag in the diaphragm air pressure tank being connected to the tank connecting pipeline through the water inlet, an air chamber in the diaphragm air pressure tank being connected to an air supply device through the air charging port, a weighing device being installed below the diaphragm air pressure tank, and the water supply pump, the weighing device and the air supply device being electrically connected to a control device. The utility model adds an air supply device, so that air can be replenished in time when the air pressure in the diaphragm air pressure tank is insufficient.

Description

Technical Field

[0001] The utility model relates to the technical field of constant-pressure water replenishing devices, in particular to a weighing automatic air replenishing constant-pressure water replenishing device. Background Art

[0002] The constant pressure water replenishment device is a commonly used constant pressure water replenishment device in air conditioning and heating systems. It can automatically stabilize the pressure and replenish water in central air conditioning systems or other systems that widely use water or ethylene glycol as heat transfer media in many shopping malls, factories and modern office buildings. Compared with the traditional open expansion water tank constant pressure, it has the advantages of flexible installation location, no noise pollution, no gas pollution, etc., so it is widely used in the HVAC constant pressure industry.

[0003] However, the air pressure in the pressure tank of the existing constant pressure water replenishment device is mostly pre-installed, and it is difficult to adjust the air pressure in the pressure tank according to the on-site working conditions. After running for a period of time, conventional equipment will experience gas loss and even cyst rupture, causing the pressure tank to lose its regulation function.

[0004] Therefore, there is an urgent need in the art for a new type of weighing automatic air and pressure constant water replenishing device to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a weighing automatic air and pressure constant water replenishing device to solve the problems existing in the above-mentioned prior art. When the gas in the diaphragm air pressure tank is lost, the gas can be timely input into the diaphragm air pressure tank through the air supply device to maintain the normal use of the equipment.

[0006] To achieve the above purpose, the utility model provides the following solutions:

[0007] The utility model discloses a weighing automatic air-filling and constant-pressure water-filling device, comprising a water supply trunk, one end of the water supply trunk is connected to a water supply source, a plurality of water supply branches are connected to the water supply trunk, a water supply pump is arranged on the water supply branch, one end of the water supply branch away from the water supply trunk is connected to a system water supply pipeline, one end of the system water supply pipeline is used to connect a heating system, a tank connecting pipeline is connected to the system water supply pipeline, one end of the tank connecting pipeline away from the system water supply pipeline is connected to a diaphragm air pressure tank, a water inlet and an air charging port are arranged on the diaphragm air pressure tank, a water bag in the diaphragm air pressure tank is connected to the tank connecting pipeline through the water inlet, an air chamber in the diaphragm air pressure tank is connected to an air supply device through the air charging port, a weighing device is installed below the diaphragm air pressure tank, and the water supply pump, the weighing device and the air supply device are all electrically connected to a control device.

[0008] Preferably, the air supply device is an air compressor.

[0009] Preferably, the control device is a PLC controller.

[0010] Preferably, there are two water supply branches.

[0011] Preferably, the water supply source is a water tank.

[0012] Preferably, a pressure transmitter and a safety valve are provided on the water supply pipeline of the system.

[0013] Preferably, the diaphragm air pressure tank is provided with a gas pressure gauge.

[0014] Preferably, the diaphragm air pressure tank is further provided with an exhaust through hole, the exhaust through hole is connected to the water bag in the diaphragm air pressure tank, and an exhaust valve is installed on the exhaust through hole.

[0015] Preferably, the lower end of the diaphragm air pressure tank is provided with three supporting legs, and the weighing device includes three weighing sensors, and the three weighing sensors are respectively installed at the lower ends of the three supporting legs.

[0016] Compared with the prior art, the utility model has achieved the following technical effects:

[0017] The utility model can measure the weight change of the diaphragm air pressure tank by a weighing device to determine whether a gas shortage problem occurs. Once a gas shortage occurs, the control device drives the gas supply device to replenish gas to the diaphragm air pressure tank in time, thereby maintaining normal use of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a structural schematic diagram of a weighing automatic air and pressure constant water replenishment device according to an embodiment of the utility model;

[0020] Figure 2 This is a flow chart of the weighing automatic air and pressure constant water replenishment device according to the embodiment of the utility model;

[0021] In the figure: 1- water supply main line; 2- water supply branch line; 201- water supply pump; 3- system water supply pipeline; 301- pressure transmitter; 4- tank connecting pipeline; 5- diaphragm air pressure tank; 501- water inlet; 502- charging port; 503- gas pressure gauge; 504- supporting leg; 505- weighing sensor; 6- air compressor. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] The utility model aims to provide a weighing automatic air and pressure constant water replenishing device to solve the problems existing in the above-mentioned prior art. When the gas in the diaphragm air pressure tank is lost, the gas can be timely input into the diaphragm air pressure tank through the air supply device to maintain the normal use of the equipment.

[0024] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0025] Embodiment 1

[0026] like Figure 1-Figure 2 As shown, this embodiment provides a weighing automatic air replenishment and constant pressure water replenishment device, including a water supply trunk 1, one end of which is connected to a water supply source, and the water supply source is used to provide water to the water supply trunk 1. The water supply trunk 1 is connected to a plurality of water supply branches 2, and the water supply branches 2 are provided with a water supply pump 201 and an electric control valve. The end of the water supply branch 2 away from the water supply trunk 1 is connected to a system water supply pipeline 3, and one end of the system water supply pipeline 3 is used to connect to the heating system. The water supply pump 201 provides water transportation power for the water supply branch 2, thereby transporting the water in the water supply trunk 1 to the heating system to provide circulating water for it. As for the heating system, it is an existing pipeline system, so the specific structure here will not be introduced in detail. The system water supply pipeline 3 is also connected to a tank body connecting pipeline 4, and one end of the tank body connecting pipeline 4 away from the system water supply pipeline 3 is connected to an existing diaphragm air pressure tank 5. The diaphragm air pressure tank 5 is a common iron tank structure, and a water bag is arranged inside it, and the water bag can be filled with water; there is an air chamber between the tank body and the water bag, and the air chamber can be filled with air. The tank body of the diaphragm air pressure tank 5 is provided with a water inlet 501 and a gas filling port 502, and the water bag in the diaphragm air pressure tank 5 is connected to the tank body connecting pipeline 4 through the water inlet 501, and a water inlet valve is arranged at the water inlet 501 for circulation at the water inlet 501, and the air chamber in the diaphragm air pressure tank 5 is connected to an air supply device through the gas filling port 502, and the air supply device is used to supply air to the air chamber in the diaphragm air pressure tank 5. A weighing device is installed below the diaphragm air pressure tank 5, and the water supply pump 201, the weighing device and the gas supply device are all electrically connected to the control device.

[0027] In actual use, the water supply source finally flows into the heating system along the water supply trunk 1, the water supply branch 2 and the system water supply pipeline 3. If the water pressure of the system water supply pipeline 3 and the heating system is high, the water in the heating system and the system water supply pipeline 3 can flow into the water bag; if the water pressure of the system water supply pipeline 3 and the heating system is low, the water in the water bag in the diaphragm air pressure tank 5 can flow into the system water supply pipeline 3, so as to replenish the water for the heating system at a constant pressure. Once the gas in the diaphragm air pressure tank 5 is lost, that is, the mass in the diaphragm air pressure tank 5 changes, the gas pressure is less than the water bag pressure at this time, and it cannot pressurize the water in the water bag into the system water supply pipeline 3. At this time, the gas supply device can be started, and the gas supply device inflates the air chamber in the diaphragm air pressure tank 5, so that the gas pressure in the diaphragm air pressure tank 5 is greater than the water pressure, thereby transporting the water in the water bag to the system water supply pipeline 3, so as to maintain the normal operation of the system.

[0028] In this embodiment, the air supply device is an air compressor 6, and the air outlet of the air compressor 6 is connected to the charging port 502 in the diaphragm air pressure tank 5 through a pipeline, so as to provide gas for the air chamber.

[0029] In this embodiment, the control device is a PLC controller, which can receive detection signals transmitted back from various devices and issue instructions to control the operation of related devices.

[0030] In this embodiment, two water supply branches 2 are provided, and the two water supply branches 2 are provided in parallel. Of course, those skilled in the art can also provide one, three or more water supply branches 2, not just two.

[0031] In this embodiment, the water supply source is a water tank, but those skilled in the art may also replace it with other containers capable of holding water.

[0032] In this embodiment, a pressure transmitter 301 and a water pressure gauge are provided on the system water supply pipeline 3. The pressure transmitter 301 and the water pressure gauge can be used to monitor the water pressure of the system water supply pipeline 3, and the pressure transmitter 301 can also be electrically connected to the control device to transmit the detected water pressure data to the control device, so as to facilitate remote monitoring by the staff.

[0033] In addition, a safety valve is also provided on the system water supply pipeline 3. Specifically, the safety valve is installed on the end of the system water supply pipeline 3 away from the heating system. The system water supply pipeline 3 is also connected to a pressure relief pipeline through the safety valve. The end of the pressure relief pipeline away from the system water supply pipeline 3 is connected to an expander or a softening water tank. When the water in the heating system is heated, the temperature of the water in the system water supply pipeline 3 and the water bag increases, the volume expands, the air chamber is squeezed, and the pressure of the air chamber increases. When the pressure of the air chamber reaches the upper limit, the water in the system water supply pipeline 3 finally enters the expander (or softening water tank) through the safety valve and the pressure relief pipeline, so that the gas pressure also drops to the set value and stops the pressure release.

[0034] In this embodiment, a gas pressure gauge 503 is provided on the diaphragm air pressure tank 5, and the gas pressure gauge 503 is electrically connected to the control device, so that the staff can remotely monitor the air pressure value of the air chamber in the diaphragm air pressure tank 5 through the control device.

[0035] In this embodiment, the upper end of the diaphragm air pressure tank 5 is also provided with an exhaust through hole, which is connected to the water bag in the diaphragm air pressure tank 5, and an exhaust valve is installed on the exhaust through hole. During the operation of the system water supply pipeline 3, it will also be connected to the water bag in the diaphragm air pressure tank 5, that is, the system water supply pipeline 3 will also transport a part of the water to the water bag in the diaphragm air pressure tank 5, and there will inevitably be some gas in the water, and a small amount of gas in the water bag will eventually slowly overflow from the exhaust valve. When a large amount of gas continues to overflow from the exhaust valve, it means that the water bag is damaged, and the water bag in the diaphragm air pressure tank 5 is connected to the air chamber. At this time, the water inlet valve at the water inlet 501 should be closed in time to cut off the connection between the diaphragm air pressure tank 5 and the system water supply pipeline 3 to avoid affecting the normal operation of the heating system.

[0036] In this embodiment, three supporting legs 504 are provided at the lower end of the diaphragm air pressure tank 5, and the weighing device includes three weighing sensors 505, which are respectively installed at the lower ends of the three supporting legs 504. The three weighing sensors 505 are used to measure the overall mass change of the diaphragm air pressure tank 5, and the relevant measurement signals are transmitted to the control device, so that the relative changes of the internal air pressure and water pressure can be known.

[0037] Embodiment 2

[0038] This embodiment provides a method for using a weighing automatic air and pressure constant water replenishment device, comprising the following steps:

[0039] 1. Initial Qi replenishment method

[0040] Before the equipment is powered on and water is supplied for debugging, the lower and upper pressure limits of the gas pressure gauge 503 are first set after confirmation by the user. Then, do not open the water inlet valve at the water inlet 501. Start the air compressor 6 to replenish air in the diaphragm air pressure tank 5 until it reaches the set lower limit. Stop replenishing air. At this time, the control device records and saves the weight detected by the weighing sensor 505.

[0041] 2. Operation principle

[0042] 2.1. Constant pressure water replenishment function: open the water inlet valve at the water inlet 501, and the system water supply pipeline 3 transports water to the water bag in the diaphragm air pressure tank 5, so that the diaphragm air pressure tank 5 starts to replenish water normally, and as the amount of water in the water bag continues to increase, the volume of the water bag continues to increase, thereby compressing the volume of the gas in the air chamber to decrease, so that the gas pressure continues to increase. When the gas pressure reaches the preset upper limit value of the gas pressure gauge 503, the water replenishment is stopped.

[0043] 2.2. Automatic air replenishment function: When the pressure transmitter 301 detects that the water pressure at the system water supply pipeline 3 drops to the preset lower limit value of the pressure transmitter 301. The control device first calculates. If the weight of the diaphragm air pressure tank 5 is greater than the initial weight, it is considered that the diaphragm air pressure tank 5 is relatively small at this time, and the water in the water bag is relatively large. The diaphragm air pressure tank 5 is in a state of lack of air at this time. At this time, the air compressor 6 is started to replenish air, and the air compressor 6 continuously delivers gas to the air chamber. As the gas in the air chamber gradually increases, the water in the air bag is squeezed out, and the discharged water will also enter the system water supply pipeline 3 to increase its water pressure. At the same time, the weight of the diaphragm air pressure tank 5 will decrease until it drops to the initial weight, and then the control device stops replenishing air, thereby realizing the function of automatic air replenishment.

[0044] 2.3. Alarm function after air bag damage: When the equipment enters the automatic air filling state, after a certain period of time exceeds the normal air filling time, the weight of the diaphragm air pressure tank 5 does not decrease, and the exhaust valve on the top of the diaphragm air pressure tank 5 continues to discharge gas. At this time, it is judged that the water bag is broken, and the controller can issue an alarm prompt, turn off the air compressor 6 and the water inlet valve, and the equipment exits the constant pressure water filling state. After manual inspection and confirmation, and the fault is reset, the equipment returns to normal.

[0045] In addition, in actual use, the weighing automatic air and pressure constant water supply device also includes pressure stabilization function and water supply function, which are as follows:

[0046] Pressure stabilization function: When the heating system pump is turned on, the circulating water in the heating system gradually heats up and its water volume expands accordingly. The system water supply pressure also increases with the increase of the heating system pressure, making the water pressure in the diaphragm air pressure tank 5 greater than the gas pressure. Water enters the water bag, so that the pressure fluctuation of the heating system is balanced within the set value range.

[0047] Water replenishment function: When the heating system stops pumping, the water temperature of the heating system drops, and its water volume decreases, causing the water pressure in the system water supply pipeline 3 to decrease accordingly. The gas pressure in the diaphragm air pressure tank 5 is greater than the water pressure, and the gas presses the water into the system water supply pipeline 3 and the heating system until the gas and water pressures in the diaphragm air pressure tank 5 are balanced. If the heating system pressure still does not meet the requirements, the water supply pump 201 is turned on to replenish water to the heating system, and the pressure in the system water supply pipeline 3 and the heating system increases accordingly. When the pressure increases to the set value, the water supply pump 201 stops working.

[0048] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A weighing automatic air and pressure constant water supply device, characterized in that: It comprises a water supply trunk, one end of which is connected to a water supply source, a plurality of water supply branches are connected to the water supply trunk, a water supply pump is arranged on the water supply branch, one end of the water supply branch away from the water supply trunk is connected to a system water supply pipeline, one end of the system water supply pipeline is used to connect to a heating system, a tank connecting pipeline is connected to the system water supply pipeline, one end of the tank connecting pipeline away from the system water supply pipeline is connected to a diaphragm air pressure tank, a water inlet and an air charging port are arranged on the diaphragm air pressure tank, a water bag in the diaphragm air pressure tank is connected to the tank connecting pipeline through the water inlet, an air chamber in the diaphragm air pressure tank is connected to an air supply device through the air charging port, a weighing device is installed below the diaphragm air pressure tank, and the water supply pump, the weighing device and the air supply device are all electrically connected to a control device.

2. The weighing automatic air and pressure constant water supply device according to claim 1 is characterized in that: The air supply device is an air compressor.

3. The weighing automatic air and pressure constant water supply device according to claim 1 is characterized in that: The control device is a PLC controller.

4. The weighing automatic air and pressure constant water supply device according to claim 1 is characterized in that: There are two water supply branches.

5. The weighing automatic air and pressure constant water supply device according to claim 1 is characterized in that: The water supply source is a water storage tank.

6. The weighing automatic air and pressure constant water supply device according to claim 1 is characterized in that: The water supply pipeline of the system is provided with a pressure transmitter and a safety valve.

7. The weighing automatic air and pressure constant water supply device according to claim 1 is characterized in that: The diaphragm air pressure tank is provided with a gas pressure gauge.

8. The weighing automatic air and pressure constant water supply device according to claim 1 is characterized in that: The diaphragm air pressure tank is also provided with an exhaust through hole, the exhaust through hole is connected with the water bag in the diaphragm air pressure tank, and an exhaust valve is installed on the exhaust through hole.

9. The weighing automatic air and pressure constant water supply device according to claim 1 is characterized in that: The lower end of the diaphragm air pressure tank is provided with three supporting legs, and the weighing device comprises three weighing sensors, which are respectively installed at the lower ends of the three supporting legs.

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