Automatic air supply device for expansion tank

Abstract

The utility model relates to an automatic air supply device of an expansion tank, which is arranged on the expansion tank, the expansion tank comprises a tank body, an air bag fixedly arranged in the tank body and a water inlet / outlet arranged at the bottom of the tank body and communicated with the air bag, an air inflation cavity is formed between the tank body and the air bag, and an air supply port communicated with the air inflation cavity is arranged at the top of the tank body. The automatic air supply device for the expansion tank comprises a water immersion sensor, an air supply device and an air supply device, wherein the water immersion sensor is mounted at the inner top end of the air bag; the first end of the hose is provided with a floating ball, the floating ball is arranged in the air bag, and the first end of the hose is exposed out of the water surface in the air bag; the second end of the hose penetrates out of the water inlet / outlet; the water-gas dual-purpose pump is arranged outside the expansion tank, and the water-gas dual-purpose pump is connected with the second end of the hose; and the water immersion sensor and the water-gas dual-purpose pump are electrically connected with the controller. The automatic air supply device for the expansion tank can automatically discharge air in the air bag, and the air is prevented from being gathered in the air bag.

Description

Technical Field

[0001] This utility model relates to the field of expansion tank equipment technology, and in particular to an automatic gas replenishment device for expansion tanks. Background Technology

[0002] An expansion tank is a water pressure regulating device consisting of four parts: a tank body, an air bladder, an inlet / outlet, and an air supply port. The inlet / outlet connects to the pipeline, and the air bladder stores water. The air bladder and tank body are pre-filled with gas at the factory, eliminating the need for manual inflation. During use, it expands when water pressure decreases due to leakage. When the gas pressure inside the expansion tank exceeds the water pressure in the pipeline, the expanding gas forces water out of the air bladder and into the system. Conversely, when the gas pressure inside the expansion tank is lower than the water pressure in the pipeline, water from the pipeline enters the expansion tank, thus maintaining stable pipeline pressure.

[0003] In actual use, air may be present in the pipe (mainly when water is injected into the pipe, air may enter the pipe with the water because it cannot be completely expelled). If air accumulates in the air bladder, it will affect the water storage capacity of the air bladder, and the accumulation in the air bladder will affect the stability of the water pressure regulation of the expansion tank. Utility Model Content

[0004] Therefore, in order to address the above problems, this utility model proposes an automatic air replenishment device for an expansion tank, which can automatically expel the air from the air bladder and prevent air from accumulating inside the air bladder.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An automatic air replenishment device for an expansion tank is disposed on an expansion tank. The expansion tank includes a tank body, an air bladder fixedly disposed within the tank body, and an inlet / outlet located at the bottom of the tank body and communicating with the air bladder. An inflation cavity is formed between the tank body and the air bladder. An air replenishment port communicating with the inflation cavity is provided at the top of the tank body. The automatic air replenishment device for the expansion tank includes:

[0007] A water immersion sensor is installed at the top inside the airbag;

[0008] A hose, the first end of which is equipped with a float ball, which is placed inside an air bladder, with the first end of the hose protruding above the water surface inside the air bladder; the second end of the hose extends out of the inlet / outlet.

[0009] A water-air dual-purpose pump, wherein the water-air dual-purpose pump is installed outside the expansion tank and is connected to the second end of the hose;

[0010] The controller is electrically connected to the water immersion sensor and the water-air dual-purpose pump.

[0011] Furthermore, it also includes:

[0012] A connecting line, the first end of which is connected to the top of the inside of the airbag, and the second end of which is connected to the float, so that the float does not fall out of the inlet / outlet.

[0013] Furthermore, it also includes:

[0014] The air pressure sensor is located inside the inflation cavity;

[0015] Solenoid valve, located at the air supply port;

[0016] An air pump, which is connected to a solenoid valve;

[0017] The pressure sensor, solenoid valve, and air pump are electrically connected to the controller.

[0018] Furthermore, a touchscreen device is electrically connected to the controller.

[0019] By adopting the aforementioned technical solution, the beneficial effects of this utility model are:

[0020] This expansion tank automatic air replenishment device uses a water immersion sensor inside the air bladder to detect whether the air bladder is full of water. If there is air inside the air bladder, the water immersion sensor sends a signal to the controller, which then controls a water-air dual-purpose pump to extract the air from the air bladder, preventing air from accumulating inside.

[0021] Furthermore, if the air pressure inside the inflation chamber needs to be changed, the air pump can be controlled to replenish the inflation chamber with air. The air pressure sensor detects the air pressure inside the inflation chamber. When the replenished air pressure reaches the required level, the air pump will automatically stop, and the solenoid valve will close at the same time. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of this utility model.

[0023] Figure 2 This is a circuit connection block diagram of this utility model. Detailed Implementation

[0024] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0025] refer to Figure 1 and Figure 2This embodiment provides an automatic air replenishment device for an expansion tank, which is installed on the expansion tank. The expansion tank includes a tank body 1, an air bladder 2 fixedly installed inside the tank body 1, and an inlet / outlet 102 installed at the bottom of the tank body 1 and communicating with the air bladder 2. A pipe (not shown in the figure) is connected through the inlet / outlet 102. An inflation cavity 100 is formed between the tank body 1 and the air bladder 2. An air replenishment port 101 communicating with the inflation cavity 100 is provided at the top of the tank body 1. The above-mentioned expansion tank is an existing device, and its usage method is also known technology, so it will not be described in detail here. This utility model does not improve the expansion tank itself.

[0026] The automatic gas replenishment device for the expansion tank includes:

[0027] The controller 8 is located outside the expansion tank. In this specific embodiment, preferably, the controller 8 is a Siemens S7-200 programmable controller.

[0028] A touch screen device 11 is disposed outside the expansion tank and is electrically connected to the controller 8.

[0029] The water immersion sensor 3 is electrically connected to the controller 8 via an insulated wire (not shown in the figure) and is installed at the top inside the airbag 2. It is used to detect whether the airbag 2 is full of water. If air accumulates inside the airbag 2 and the water immersion sensor 3 is not submerged in the water inside the airbag 2, the water immersion sensor 3 sends an electrical signal to the controller 8.

[0030] The hose 5 has a float 4 at its first end, which is located inside the air bladder 2 and exposes the first end of the hose 5 above the water surface inside the air bladder 2; the second end of the hose 5 extends out of the inlet / outlet 102.

[0031] In actual installation, the flexible hose 5 should also extend out of the pipe.

[0032] The connecting line 41 has its first end connected to the top of the inside of the airbag 2 and its second end connected to the float 4, so that the float 4 does not fall out of the inlet / outlet 102.

[0033] A water-air dual-purpose pump 9 is installed outside the expansion tank and is connected to the second end of the hose 5 (not shown in the figure, but those skilled in the art should understand the connection method between the water-air dual-purpose pump 9 and the hose 5); the water-air dual-purpose pump 9 is electrically connected to the controller.

[0034] A pressure sensor 6 is installed inside the inflation cavity 100 to detect the air pressure inside the inflation cavity 100; the pressure sensor 6 is electrically connected to the controller 8.

[0035] Solenoid valve 7 is installed at air inlet 101; solenoid valve 7 is electrically connected to controller 8.

[0036] An air pump 10 is connected to a solenoid valve 7. When the solenoid valve 7 is opened, air is pumped into the air chamber 100 through the air pump 10. The air pump 10 is electrically connected to a controller 8.

[0037] The water immersion sensor 3, air pressure sensor 6, solenoid valve 7, water-air dual-purpose pump 9, air pump 10, and touch screen device 11 mentioned above are all existing electronic devices. Those skilled in the art should have the conventional ability to select the above electronic devices.

[0038] The working principle of this automatic gas replenishment device for the expansion tank is as follows:

[0039] This automatic air replenishment device for the expansion tank uses a water immersion sensor 3 installed inside the air bladder 2 to detect whether the air bladder 2 is full of water. If there is air inside the air bladder 2, the water immersion sensor 3 sends a signal to the controller 8, which then controls the water-vapor dual-purpose pump 9 to extract the air from the air bladder 2, preventing air from accumulating inside. When the water immersion sensor 3 detects water, the controller 8 determines that the air bladder 2 is full of water and controls the water-vapor dual-purpose pump 9 to stop extracting air.

[0040] To change the water pressure within the pipeline (not shown in the diagram), it should be noted that this refers to changing the actual water pressure required for the pipeline's transport. Simultaneously, the air pressure in the inflation chamber 100 must also be changed for the expansion tank to function properly. The air pump 10 can be controlled to supply air to the inflation chamber 100. The air pressure sensor 6 detects the air pressure within the inflation chamber 100. When the supplied air pressure reaches the required level, the air pump 10 automatically stops, and the solenoid valve 7 closes.

[0041] This automatic gas replenishment device for expansion tanks has a simple structure, is easy to use, and is practical.

[0042] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. An automatic air replenishment device for an expansion tank, disposed on an expansion tank, the expansion tank comprising a tank body, an air bladder fixedly disposed within the tank body, and an inlet / outlet disposed at the bottom of the tank body and communicating with the air bladder, wherein an inflation cavity is formed between the tank body and the air bladder, and an air replenishment port communicating with the inflation cavity is disposed at the top of the tank body, characterized in that, The automatic gas replenishment device for the expansion tank includes: A water immersion sensor is installed at the top inside the airbag; A hose, the first end of which is equipped with a float ball, which is placed inside an air bladder, with the first end of the hose protruding above the water surface inside the air bladder; the second end of the hose extends out of the inlet / outlet. A water-air dual-purpose pump, wherein the water-air dual-purpose pump is installed outside the expansion tank and is connected to the second end of the hose; The controller is electrically connected to the water immersion sensor and the water-air dual-purpose pump.

2. The automatic gas replenishment device for an expansion tank according to claim 1, characterized in that, Also includes: A connecting line, the first end of which is connected to the top of the inside of the airbag, and the second end of which is connected to the float, so that the float does not fall out of the inlet / outlet.

3. An automatic gas replenishment device for an expansion tank according to claim 1 or 2, characterized in that, Also includes: The air pressure sensor is located inside the inflation cavity; Solenoid valve, located at the air supply port; An air pump, which is connected to a solenoid valve; The pressure sensor, solenoid valve, and air pump are electrically connected to the controller.

4. An automatic gas replenishment device for an expansion tank according to claim 3, characterized in that, Also includes: A touchscreen device, which is electrically connected to a controller.

Images