JPH0643298U - Antifreeze device for pumps - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent damage due to freezing of pumps. [Structure] The pump body to be frozen is connected to the heater, chamber, inlet thin tube, outlet thin tube, and check valve, and the heater wiring, thermostat, and water level sensor are connected. Then, it is composed of a heat insulating material covering the outside and a cover.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is a heater device that prevents damage to pumps due to freezing.

[0002]

[Prior art]

 Conventionally, a typical method to prevent freezing of pumps is to wrap a heater wire around the pump body from the outside, cover it with a heat insulating material, and heat the whole body by energizing it when the water becomes cold. II A method in which a screw-in heater is attached to the bottom of the pump body to directly heat the water in the pump. III Method of heating the entire pump room. It is roughly divided into three types.

[0003]

[Problems to be solved by the device]

 Among the methods described in the section of the prior art, the method of I has the problem that it takes time and cost because it covers the entire pump, and in the case of maintenance and inspection of the pump, the coating is completely removed and restored. there were.

In the method of II, there is a problem that the body of the pump, that is, the water passageway, is provided, and if the heater is pushed into the water passageway, it impedes the water flow, increases the water flow resistance, and hinders the performance of the pump. was there. In the case of directly heating water, if there is no water, there is a problem that the heater itself overheats and the pump and piping overheat, causing the rubber packing and PVC piping to burn.

The method of III has a problem that the equipment and maintenance costs are very high.

The present invention has been made in order to solve the above-mentioned problems of the prior art, and its purpose is to wrap the entire pump or to prevent the water passage in the pump from being obstructed and to be inexpensive. It is intended to provide a device for preventing freezing.

[0007]

[Means for Solving the Problems]

 The outer surface is covered with a heat insulating material, the lower part of the chamber containing the heater and the lower part of the pump suction side are connected by a thin tube, and the upper part of the chamber and the upper part of the pump discharge side are connected by a narrow tube through a check valve, and further on top. It is equipped with a water level sensor and a temperature sensor in the middle of the heater power supply wiring.

The same effect can be obtained even if the water level sensor and the temperature sensor are separate devices and are electrically connected and operated with the device of the present invention.

[Operation] The water level sensor confirms that the pump and the chamber of the present invention are filled with water, and the thermostat installed near the pump lowers the temperature to + 5 ° C. When the temperature rises to around + 15 ℃, the power is shut off. When the power is turned on, the heater heats the water in the chamber, and the high-temperature water is jetted from the thin tube on the upper part of the chamber to the check valve by pushing open the check valve. At the same time, the cold water from the lower part of the chamber connected to the lower part of the pump enters due to the negative pressure generated by the water in the chamber being jetted. By repeating this process to heat a small amount of water in the chamber and circulate it in the pump sequentially, a large amount of water in the pump is gradually heated to prevent freezing.

[Embodiment] An embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a sectional view of a main part of the present invention, and FIG. 2 is an explanatory view of a pump to which the present invention is attached. Is a heater, which is attached to the lower part of the chamber in a watertight manner using a normal screw-in sheath heater for water. In the chamber, the inlet thin tube is connected to the lower part and the outlet thin tube is connected to the upper part through check valves, and the water level sensor is attached. The inlet thin tube is directly connected to the suction side lower part of the anti-freezing pump, and the outlet thin tube is connected to the pump discharge side upper part. (10) is a heater wiring, and the thermostat (11) and the water level sensor wiring are branched and connected in the middle. The thermostat detects the temperature of the lower part of the pump body, and the power of the heater is normally turned on at + 5 ° C and turned off at + 15 ° C by the action of the bimetal. The water level sensor connects two insulated electrodes, and when water is filled between the electrodes, the wire closes with water as a medium, and if there is no water, the wire opens and the heater is not energized. The antifreezing device of the present invention is configured as described above.

The check valve prevents the discharge water from flowing back to the suction side of the pump through the thin tube, the chamber and the thin tube when the pump is operated.

[Effects of the Invention] Since the present invention is configured as described above, the following effects can be obtained.

When the chamber is filled with water and the temperature drops to + 5 ° C., the heater is energized to rapidly heat the water in the chamber. When the water temperature becomes close to + 100 ° C, the check valve is pushed up and hot water is jetted from the outlet thin tube to the pump. At the same time, since the pressure in the chamber becomes negative, the inlet narrow tube, that is, the cold water at the lower part of the suction side of the pump, enters the chamber and is heated. By repeating this in sequence, a large amount of water in the pump is gradually heated to prevent freezing.

When the temperature of the lower part of the pump rises to + 15 ° C., the circuit of the thermostat (11) is opened to stop the power supply to the heater and prevent excessive heating.

When the amount of water in the chamber is insufficient, the circuit of the water level sensor opens to shut off the power supply to the heater, prevent the heater from being burnt, and prevent accidents such as burnout.

The same effect as that of the present invention can be obtained by making a device in which the water level sensor and the thermostat (11) are separately provided and wiring them to the heater.

Generally, since the drain of the pump body has a drain removing screw and the upper portion thereof has an air removing screw or a gauge attaching screw, the device of the present invention can be installed only by attaching a thin tube.

Since there is no protrusion on the water passage in the pump, the water resistance does not increase.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of the configuration of the device of the present invention.

FIG. 2 is a conceptual diagram showing a method of using the device of the present invention.

[Explanation of code] Heater chamber Inlet narrow tube Check valve Outlet thin water level sensor Insulation cover Pump ▲ 10 ▼ Heater wiring ▲ 11 ▼ Thermostat

Claims (2)

[Scope of utility model registration request] 1. A heat-insulating material on the outside, a lower part of a chamber containing a heater and a lower part of a pump body are connected by a thin tube, and an upper part of the chamber and an upper part of the pump body are connected via a check valve. An anti-freezing device for pumps, characterized in that a water level sensor is attached to the upper part of the chamber and a temperature sensor is provided in the middle of the power supply wiring for the heater. 2. The antifreezing device for pumps according to claim 1, wherein the water level sensor and the temperature sensor are separate devices and are electrically connected to the device of the present invention.