KR970001729Y1 - Heat transfer protection device for hot water recycling pump for boiler - Google Patents

Abstract

None.

Description

Thermal cut-off device of hot water circulation pump for boiler

1 is a longitudinal cross-sectional view of the installation state of the present invention.

2 is an enlarged cross-sectional view of the main portion of FIG.

3 is a cross-sectional view taken along the line A-A 'of FIG.

Figure 4 is an exploded perspective view of the main part of the present invention.

* Explanation of symbols for main parts of the drawings

10: motor unit 11: body

12: motor shaft 20: pump portion

21: Case 28: Impeller

30: cooling part 31: vertical plate

32: support plate 33: outer peripheral wall

40: heat shield 41: boss

The present invention relates to a heat shield device for a hot water circulation pump for a boiler to heat water and use heating and hot water.

The hot water circulation pump of a boiler heats fuel and forces hot water to be circulated into a pipe, which is installed in a gas boiler or an oil boiler.

The pump structure for hot water circulation consists of a motor that is surrounded by a metal case on one side, and a pump that rotates the impeller formed on the shaft by driving the motor to force circulation of water. Will receive.

The reason is that the heat generated as the motor continues to rotate and the heat conducted when the pumping action of introducing relatively hot water into and out of the outlet combine to cause mutual temperature rise.

Therefore, the motor pump is forced to maintain a high temperature at all times.

When the heat of rotation of the motor and the heat of conduction of the hot water are combined in this manner, not only the life of the motor is shortened, but also a fire and various accidents are caused by overheating.

This is because the boundary between the motor part and the pump part is made of metal to increase the heat conduction to provide the cause of the overall heat rise.

According to the production standard of the motor, the maximum temperature is maintained within 80 degrees c during motor heating in consideration of safety and lifespan.

However, the motor used in the hot water circulation pump usually passes the maximum allowable temperature by heat transfer by hot water, so the motor used for the hot water circulation reduces the frictional resistance during rotation to suppress the temperature rise as much as possible. In addition to improving precision, it should also have airtightness to block the inflow of water from the hot water circulation.

Accordingly, the hot water circulation motor is very difficult to manufacture, and despite the high price, most of them depend on imports.

Such expensive hot water circulation pumps also have hot water and motor calorific values that are fused and heated up above the proper temperature, causing easy breakdown due to overheating and deformation. There was a closed end that appeared mainly in the hot water circulation pump.

An object of the present invention is to provide a hot water circulation pump that can suppress the rise in temperature and extend the life by blocking the heat conducted to the motor unit.

Hereinafter, the present invention will be described in detail with the attached drawings.

The present invention is to rotate the motor shaft (12) extending to one side by the power of electrical energy, the outer surface of the motor unit (10) is wrapped with the outer body (11); Pump unit 20 for forcibly discharging the hot water introduced through the inlet hole 22 drilled in the case 21 by the rotation of the impeller 24 fixed to the motor shaft 12 to the outlet 23 and ; Located between the motor unit 10 and the pump unit 20, the vertical wall 33 and the outer circumferential wall 35 to maintain the airtight in the pump unit 20 is in close contact with the motor unit 10 In the thing comprised by the cooling part 30 provided with the space chamber 31 between the support plates 33 integrally formed; It is located in the space (31) of the cooling unit 30 and the motor shaft 12 by the fixing means 43 to block the conduction of heat to the motor unit 10 by the motor shaft 12 and It is characterized in that the heat shield plate 40 of the metal material is fixed.

The motor unit 10 is a structure for driving the impeller 24 of the pump unit 20 by electrical energy. Therefore, it is common for the winding coil 15 to be wound inside the outer body 11 made of a metal material so that the motor shaft 12 exposed to one axis is rotated at a constant speed.

The pump unit 20 is a structural unit for rotating the impeller 24 by the driving of the motor unit 10 to force circulation of hot water.

The impeller 24 is fixed to the end of the motor shaft 12 is rotated by the transmission of the power of the motor unit 10, the hot water inside from the inlet hole 22 that is drilled in one axis of the case 21 After flowing into, to be discharged back to the outlet 23 is to force forced circulation.

The cooling unit 30 is a space chamber 31 between the motor unit 10 and the pump unit 20 at intervals in which the vertical plate 32 and the support plate 33 are set by the length of the outer circumferential wall 35. This is formed so that the transfer of the temperature formed in the pump unit 20 is filled in the space chamber 31 to be blocked by the air having a very low thermal conductivity, which is the same as in the prior art.

The most important structural feature of the present invention is to transfer the power of the motor unit 10 to the pump unit 20, the temperature of the pump unit 20 by the motor shaft 12 of the metal material having a high temperature conductivity There is provided a heat shield plate 40 for blocking the transmission to (10).

The heat shield plate 40 is made of a metal material having excellent heat conduction so as to be in close contact with the motor shaft 12 to block heat conduction.

That is, in the process of conducting heat along the motor shaft 12,

In the position of the heat shield plate 40 which is tightly fixed by the fixing means 43, most of the heat is conducted to the heat shield plate 40, the heat shield plate 40 as shown in FIG. Since the heat dissipation area is very large, the heat dissipation is to be made to the space chamber 31.

Therefore, as a result of blocking heat from being conducted along the motor shaft 12 in the middle, dissipating heat, and cooling, the temperature transmitted to the motor unit 10 can be significantly lowered, thereby increasing the service life and operating efficiency. .

At this time, since the motor shaft 12 is a rotating body that is a rapid rotation, the heat shield plate 40 fixed by the fixing means 43 to the motor shaft 12 is rotated together so that the effect of cooling is better exhibited.

In addition, as shown in FIG. 2, the cooling effect is further increased by supplying wind to the motor unit 10 in the blade 42 which is rotated by integrally forming the blades 42 toward the cooling unit 30. It is desirable to.

In this case, the vertical plate 33 installed in close contact with the motor unit 10 is drilled through the vent hole 34 so that the cooling wind can pass.

The fixing means 43 of the heat shield plate 40 having such a function screws the set screw 44 to the boss 41 fitted to the motor shaft 12, as shown in FIG. It is easy to assemble and disassemble when necessary to operate the plane 13 for smoothly machining the motor shaft 12 to a position where the end of 44 is in contact, and the process is simple and practical.

When the motor shaft 12 transmits the power of the motor unit 10 to the pump unit 20 while passing through the space chamber 31 of the cooling unit 30, the pump unit 20 is not filled. Since there is a fear that the moisture is finely moved along the motor shaft 12 penetrating the support plate 33, as shown in Figure 2 as a means for preventing the bush 25 coupled to the support plate 33 and It is effective to prevent the packing 26 from seeping into the gap between the bosses 41 by making the packing 26 elastically installed with the spring 27 to the motor shaft 12 close to each other.

The bush 25 is not worn in spite of repeated rotation of the motor shaft 12, and it is preferable that the bush 25 is formed of a ceramic material rather than a metal material in order to maintain strength and sealing ability.

In spite of such a sealing holding means, the water moved to the motor unit 10 along the motor shaft 12 is dropped at the same time as blocking the movement at the position of the heat shield plate 40, the dropped water is supported plate It is to be discharged to the outside through the through-hole 36 of the outer circumferential wall 35 bent horizontally to maintain the gap around (33).

It is preferable that the through hole 36 is drilled at one or most two or three positions at the bottom of the bottom so as to facilitate the discharge of water falling to the bottom.

The present invention as described above, first, it is possible to block the conduction of the temperature of the pump portion, which is the cause of the temperature rise of the motor portion to extend its life, and increase the driving efficiency.

Second, since the movement of the water filled in the pump portion is prevented in advance by the heat shield plate and the packing, there is almost no fear of failure due to a short circuit.

Third, the hot water circulation pump, which caused the major failure of the boiler, allows the boiler to be used safely and securely.

Fourth, since there is no case of overheating, it is possible to manufacture a circulation pump even if a cheap motor with a relatively low precision is provided, which is a very useful design such as providing economic benefits to consumers and manufacturers.

Claims (7)

A motor unit 10 configured to rotate the motor shaft 12 extending in one axis by the power of electric energy, and to surround the outer surface of the motor shaft 12 with the outer body 11; Pump unit 20 for forcibly discharging the hot water introduced through the inlet hole 22 drilled in the case 21 by the rotation of the impeller 24 fixed to the motor shaft 12 to the outlet 23 and ; Located between the motor unit 10 and the pump unit 20, the vertical wall 33 in close contact with the motor unit 10 and the outer circumferential wall 35 to maintain the air tightness in the pump unit 20 is integral In the thing comprised by the cooling part 30 provided with the space chamber 31 between the support plates 33 shape | molded by the; It is located in the space (31) of the cooling unit 30 and the motor shaft 12 by the fixing means 43 to block the conduction of heat to the motor unit 10 by the motor shaft 12 and The heat shield of the hot water circulation pump for boilers, characterized in that the heat shield plate 40 of the metal material is fixed. The heat shield device of claim 1, wherein the heat shield plate (40) is integrally molded with the blades (42) toward the motor unit (10). The method of claim 1, wherein the fixing means 43 is screwed to the set screw 44 to the boss 41 of the heat shield plate 40, and to the motor shaft 12 in abutting position of the set screw 44. Train apparatus of the hot water circulation pump for boilers, characterized in that the plane (13) is molded. The boiler according to claim 1, wherein a packing (26) elastically supported by a spring (27) is installed in close contact with the bush (25) to which the motor shaft (12) is rotatably coupled to the support plate (33). Thermal shutoff pump for hot water circulation pump. The heat shield device of the hot water circulating pump for a boiler according to claim 2, wherein the vertical plate (33) is provided with a vent hole (34). The heat shield device of the hot water circulation pump for boiler according to claim 1, wherein the bottom surface of the outer circumferential wall (35) has a through hole (36) for discharging water. The heat shield of the hot water circulation pump for a boiler according to claim 4, wherein the bush (25) is formed of a ceramic material.