KR200453385Y1 - Quick float holder type level switch - Google Patents

Abstract

The present invention relates to a float type level switch, also referred to as an 'outlet type level switch' installed inside a liquid tank and outputting an on / off state due to buoyancy caused by a change in water level.

According to the present invention, since the float joint portion, which is a portion where the float housing and the float cap are joined to each other, can be guaranteed with a triple sealed structure, the liquid can be prevented from flowing into the inside. In addition, since the float housing and the float cap have a solid integrity due to the structure of the float joint, durability can be improved and a long-term use can also be obtained.

The present invention fills the epoxy molding part in the space below the inside of the float housing during the manufacturing process, and immediately after the float housing and the float cap are bonded to each other by the float joint, the gas generated therein is discharged through the gas discharge hole. By discharging, it is possible to prevent the volatile gas components generated during epoxy molding from remaining and to prevent the formation of internal pressure due to the gas, so that the epoxy impregnation is good, and the bonding state of the float joint is not adversely affected.

Float, level, switch, float junction, switch holder, epoxy molding.

Description

Float type level switch

The present invention relates to a float type level switch, also referred to as an 'outlet type level switch' installed inside a liquid tank and outputting an on / off state due to buoyancy caused by a change in water level.

Float type level switch is also called 'Bottom level switch'.When float starts to float due to the change of water level, the steel ball inside the column moves to the opposite side and the center of gravity due to the movement of the steel ball Float is an instrument that controls the water level by stopping or operating the pump, etc. by outputting the on / off state by operating the micro switch or the tilt switch while being turned upside down like an Ottogi. It is widely used for.

The conventional float type level switch is connected by a controller and a cable installed on the outside of a sewage tank, etc., and a float housing having a conical body having an opening corresponding to each other with an inner space, and a float cap having a hemispherical body. The overall shape is made of water droplets.

Conventional float type level switches are fitted by simply fitting the float housing and the float cap to each other. Specifically, there is a protrusion frame around the opening of the float housing, and a fitting groove into which the protrusion frame is fitted around the opening of the float cap. This is formed, there is a problem that the joint is fragile because the corresponding protruding frame is a single structure fitted into the fitting groove.

On the other hand, a switch holder with a steel ball is installed inside the float housing, and an epoxy molding is filled in the space around the bottom of the switch holder, and then the float housing and the float cap are simply fitted to each other to be bonded to each other. .

The epoxy molding filled in the space around the bottom of the switch holder is filled by mixing a main component and a hardener in a predetermined amount, and when the two components meet, gas generated by heat generation and bubbles is generated. This gas must be allowed to cure before joining the float housing to the float cap. This is because epoxy impregnation becomes poor when the bubble component generated during epoxy molding remains.

However, in the manufacturing process, the float housing and the float cap are directly bonded to each other in order to improve productivity without allowing time for curing of the epoxy molding.

Accordingly, when the bubble component remains as it is while the epoxy molding is cured, not only epoxy impregnation may be caused, but as described above, the conventional float type level switch has a fragile structure in which the float joint is coupled to a single layer. As the epoxy molding hardens, the gas generated from curing does not escape from the inside space of the closed float, and as a result of the generated gas, the force that expands on the inner surface of the float cap acts, causing the fragile float joint to be broken. It is a cause that can leak through the site.

In addition, the conventional float type level switch is a chattering in which the steel ball inside the switch holder moves up and down repeatedly as the waste water is swayed, and thus the switch is frequently turned on or off. (chattering) There was a problem bringing up the phenomenon. This is because the inner surface of the columnar switch holder provided inside the conventional float type level switch forms the same surface.

The above chattering phenomenon generally refers to a phenomenon in which a contact of a switch or a relay in an electronic circuit is attached or dropped by a mechanical vibration and is actually repeated in a very short time. In addition to this, it also shortens the life of electrical systems (eg pumps), including external controllers connected to float type switches.

In addition, a switch holder installed inside a conventional float type level switch uses a micro switch or a tilt switch as a switch for outputting an ON / OFF state according to a change in water level. In some cases, switch holders are manufactured separately.

The present invention has been devised to solve the above problems, and its purpose is to ensure that the float joint, which is the portion where the float housing and the float cap are joined to each other, ensures a reliable sealing effect, and that the float housing and the float cap have a solid integrity. The branch is to provide a float type level switch.

In addition, the present invention, after filling the epoxy molding portion in the space below the inside of the float housing in the manufacturing process, immediately discharge the gas generated from the epoxy molding portion in a state in which the float housing and the float cap is bonded to each other by the float joint portion To provide a float type level switch that can be sealed.

In addition, a float formed by removing and molding a part of the wire sheath impregnated with epoxy inside the float housing to prevent moisture or water generated by condensation from penetrating into the float through the cable core wire in the exposed cable. It is to provide a type level switch.

Another object of the present invention is to provide a float type level switch capable of preventing frequent switch operation due to fluctuations of sewage.

The present invention also provides a float type level switch that can be easily mounted by selectively selecting a micro switch or a sealed tube switch as a switch mounted on a switch holder and outputting an ON / OFF state according to a change in water level.

In order to achieve the object as described above, the present invention outputs the on / off state by the buoyancy according to the change of the water level of the switch mounted in the switch holder installed inside, and is connected to the controller and cable installed in the water level The float type level switch is formed by joining the float housing and the float cap each having an opening corresponding to each other, each having an inner space, the float housing is raised up from the circumference of the opening to the outer peripheral surface An outer side protruding frame having a thread and an inner side inserting groove which enters downward along an inner side of the outer protruding frame are provided, and the float cap corresponds to the outer protruding frame and the thread of the float housing at an opening circumferential surface thereof, and the outer protruding frame So that there is a gap between An outer side insertion groove having a screw portion on an outer inner circumferential surface thereof, and an inner side protrusion extending downward to correspond to the inner side insertion groove of the float housing and having a gap therebetween with the inner side insertion groove, the float It is characterized in that it comprises an epoxy molding portion formed by curing the epoxy mold is filled in the inner side insertion groove and the outer side insertion groove formed in the housing and the float cap, respectively.

In addition, a cylindrical portion is formed below the float housing, a lower end portion of the switch holder is inserted into the cylindrical portion, and a cable is inserted into the cable through a cable insertion hole penetrated through the lower surface of the cylindrical portion, and exposed from the cable. The wire may be connected to a switch mounted on the switch holder, and the epoxy molding part may be filled and cured in the space around the cylindrical part, and the epoxy molding part may be generated while the float housing and the float cap are bonded to each other. In order to discharge the volatile gas to the outside from the surface of the float cap gas exhaust hole having a stepped groove is passed through, after the gas is discharged through the gas discharge hole is coupled to the blocking hole to the gas discharge hole And, the stepped groove further comprises a sealed by filling with an epoxy molding portion And a gong.

In addition, a wire covering removal portion in which a part of the exposed wire covering of the cable inserted into the cable inserted through the cable insertion hole is removed is formed, and the wire covering removing portion further includes an impregnation in the epoxy molding portion. .

In addition, the switch holder is divided into the lower body and the upper body is formed while having an internal space to move the steel ball is built, the inner surface of the upper body and the inner surface of the lower body is stepped to provide an inclined jaw It features.

In addition, the switch mounted on the switch holder is a micro switch, the upper surface of the upper body of the switch holder is formed with both side plates, the upper surface of the upper body corresponding to the two side plates is open, the micro switch is the contact piece It is characterized by being mounted between the two side plates while facing toward the fixed with a screw.

The switch mounted on the switch holder is a sealed tube switch in which iron ore powder is embedded, and both side plates are formed on an upper surface of the upper body of the switch holder, and correspond to an outer circumferential surface of the sealed tube switch on opposite sides of the side plates. It has a concave curved surface having a first settled surface located on one side and a second settled surface located on the other, the upper surface of the upper body corresponding to the two side plates is open, the sealing tube switch is the first settled surface It is characterized in that mounted on one side or the other or both of the second settled and both sides in different on / off direction.

According to the present invention, since the float joint portion, which is a portion where the float housing and the float cap are joined to each other, can be guaranteed with a triple sealed structure, the liquid can be prevented from flowing into the inside. In addition, since the float housing and the float cap have a solid integrity due to the structure of the float joint, durability can be improved and a long-term use can also be obtained.

In addition, the present invention, after filling the epoxy molding portion in the space below the inside of the float housing during the manufacturing process, the gas discharge hole formed in the float cap in the state in which the float housing and the float cap mutually joined by the float joint portion Through the gas generated in the epoxy molding portion is discharged, it can be sealed by filling the gas discharge hole with a blocking hole and the epoxy molding portion. Accordingly, since the gas generated in the epoxy molding part is discharged through the gas discharge hole, the bubble components generated during the epoxy molding are prevented from remaining, so that the epoxy impregnation is good, and the bonding state of the float joint is not adversely affected. . On the other hand, after filling the epoxy molding in the space below the inside of the float housing, the float joint can be joined immediately without delay in the working process, thereby improving work efficiency.

In addition, by removing and molding part of the wire sheath impregnated with epoxy inside the float housing, moisture or water generated by condensation in the cable exposed to the outside can be prevented from penetrating into the float through the core of the cable.

In addition, a stepped inclined jaw is provided on the inner surface of the switch holder having an internal space in which the steel ball is built, and the steel ball is caught by the inclined jaw when the inclination angle of the float is within a range of 10 degrees to 15 degrees. As it prevents, it is possible to prevent the chattering (chattering) phenomenon caused by the runoff, such as sewage.

In addition, the switch is mounted on the switch holder to output the ON / OFF state in accordance with the change in the water level can be easily mounted and used by selectively selecting the micro switch or the sealed tube switch.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail. The present invention is not limited to the embodiments disclosed below, but can be implemented in a variety of different forms, only this embodiment to make the disclosure of the present invention is complete and complete the scope of the invention to those skilled in the art It is provided to inform you.

1 is a cross-sectional view taken along line AA of FIG. 3 as a combined cross-sectional view of a float type level switch according to the present invention, and FIG. 2 is a cross-sectional view taken along line BB of FIG. 3 as a separated cross-sectional view of a float type level switch according to the present invention. Figure 3 shows a plan view of a float housing constructed in the present invention.

1 to 3, the present invention outputs the on / off state of the switch mounted in the switch holder 10 installed therein by buoyancy according to the change of the water level, and the controller and the cable installed outside. Float type level switch which is connected to (5) so that the water level can be adjusted, and the float housing (1) and the float cap (2), each having an internal space and corresponding openings, are joined to each other. There is a difference from the prior art in the structure of the float junction portion 30, which is the junction portion of the housing 1 and the float cap 2.

The float housing 1 rises upward from the circumferential surface of the opening and has an outer protruding frame 31 having a threaded portion 33a on its outer circumferential surface, and an inner side inserting groove 34 which enters downward along the inner side of the outer protruding frame 31. This is provided.

The float cap 2 enters upwardly so as to have a gap between the outer protruding frame 31 and the outer protruding frame 31 of the float housing 1 on the circumferential surface of the opening and corresponding to the outer protruding frame 31 and the threaded portion 33a of the float housing 1. The outer side insertion groove 32 having a threaded portion 33b on the outer inner circumferential surface and the inner side insertion groove 34 corresponding to the inner side insertion groove 34 of the float housing 1 can be provided with a gap therebetween. An inner protruding frame 35 extending downward is provided.

In addition, an epoxy molding part E3 formed by curing an epoxy mold in the inner side insertion groove 34 and the outer side insertion groove 32 formed in the float housing 1 and the float cap 2, respectively, is formed. It is made to include.

Here, a gap between the outer protruding frame 31 of the float housing 1 and the outer inserting groove 32 of the float cap 2 corresponds to the thickness and the extended length of the outer protruding frame 31. The width and depth of the outer side insertion groove 32 is slightly larger than that of the inner side insertion groove 34 of the float housing 1 and the inner side protruding frame 35 of the float cap 2. Leaving a gap means that the width and depth of the inner side insertion groove 34 are slightly larger than the thickness and the extended length of the inner side protrusion frame 35. In the state in which the float housing 1 and the float cap 2 are bonded to each other, the epoxy molding part E3 is hardened in the gap portion.

Accordingly, from the outside of the float housing 1, the single closed portion by coupling the screw portions 33a and 33b, the outer protruding frame 31 of the float housing 1 and the outer insertion groove of the float cap 2 ( 32, the double joints by the hardened epoxy molding part E3 in the gaps between the parts, the inner periphery of the float housing 1 and the inner periphery of the float cap 35 overlapping It has triple closed area by site. That is, since the float joint portion 30 has a triple sealed structure, a sure sealing effect can be ensured, and thus liquid can be prevented from flowing into the inside. In addition, due to the structure of the float joint portion 30, the float housing 1 and the float cap 2 have a solid integrity, so that durability can be improved and a long term effect can be obtained.

As shown in FIG. 3, the cylindrical part 3 is erected in the lower part of the inside of the said float housing 1, The cylindrical part 3 is inserted into the lower end part of the switch holder 10, and is installed in the state. It is hardened by filling the epoxy molding part E1 in the space around the part 3 (refer FIG. 1). Unexplained reference numeral 7 shown in FIG. 3 is a 'cutting part', the cylindrical part 3 When the switch holder 10 is inserted into the cylindrical portion 3 by being vertically cut at four circumferences thereof, an elastic force by the cutout portion 7 is exerted to establish a coupling state between the switch holder 10 and the cylindrical portion 3. It can be securely fixed and used as a gap for cable wiring. Unexplained reference numeral 8 denotes a 'reinforcement rib'.

A cable insertion hole 4 penetrates through a lower surface of the cylindrical portion 3 of the float housing 1, and a cable 5 is inserted through the cable insertion hole 4 to expose an electric wire exposed from the cable 5. The epoxy molding part E1 is filled while being connected to the switch mounted on the switch holder 10.

Here, before filling the epoxy molding portion E1, a predetermined portion of the exposed wires (3) of the cable 5 inserted through the cable insertion hole 4, that is to say the site impregnated with epoxy A portion of the wire covering corresponding to the length is removed to form the wire covering removing portion 5a.

In addition, the cable insertion hole 4 and the cable (4) are fixed to the periphery of the front end of the cable 5 in the inside of the cable insertion hole 4 by coupling the 'O' ring 6 to the cable 5. 5) Fill the epoxy molding part (E1) with the gap between them sealed. Accordingly, the epoxy molding part E1 is cured so that the switch holder 10 is integrally fixed to the float housing 1, and liquid is introduced through the cable insertion hole 4 by the epoxy molding part E1. Can be prevented.

Meanwhile, as shown in FIG. 1, the wire covering removing part 5a is impregnated in the epoxy molding part E1 and installed as shown in FIG. 6 or moisture generated by condensation in the cable 5 exposed to the outside. When water penetrates into the float housing 1 through the core wire of the cable 5 submerged in water, it is blocked by the wire covering removing part 5a impregnated in the epoxy molding part E1, and the water penetrates. Can be prevented.

Immediately thereafter, the float housing 1 and the float cap 2 are joined together by the float joint portion 30 as described above.

Here, when the epoxy molding part E1 is molded, a high temperature volatile gas is generated by a chemical reaction. In the present invention, in the state in which the float housing 1 and the float cap 2 are bonded to each other, a gas is formed on the surface of the float cap 2 so that the gas generated while the epoxy molding part E1 is cured can be discharged to the outside. It may be configured to further include a discharge hole (20).

Referring to FIG. 4, the gas discharge hole 20 is penetrated to have a stepped groove 22 thereon, and after discharging the gas generated from the epoxy molding part E1 through the gas discharge hole 20. Is used as a pressure test port for the airtightness test of the float joint and when the airtightness test is passed, the blocking hole 21 is coupled to the gas discharge hole 20, and the stepped groove 22 is epoxy-molded in order to ensure a tight sealing. It is sealed by filling with part (E2).

Therefore, since all of the gas generated in the epoxy molding part E1 can be discharged through the gas discharge hole 20, the bubble components generated during the epoxy molding are prevented from remaining and the epoxy impregnation becomes good, and the float joint part ( 30) does not adversely affect the bonding state.

1 to 3, the switch holder 10 is formed by dividing the lower body 12 and the upper body 13 while having an inner space in which the steel ball 11 is embedded and moved as a cylindrical body. There is, the inner surface of the upper body 13 and the inner surface of the lower body 12 is stepped so that the inclined jaw 16 is provided. The inclined jaw 16 is for preventing a chattering phenomenon, which will be described below with reference to FIGS. 5 and 6.

5 is a state diagram using the float type level switch according to the present invention, Figure 6 shows an operational state diagram of the float type level switch according to the present invention.

As shown in Figure 5, the float type level switch 100 (hereinafter referred to as 'float' for short) according to the present invention is installed and used in the sewage tank, for example, the upper terminal of the sewage tank, the controller is built-in Box 200 is installed, the fixed weight 220 is suspended on the rope 210 connected from the terminal box 200, the cable 5 connected to the float 100 according to the present invention from the rope 210 Leave a certain length (usually 200 ~ 250mm) and fasten it using a cable tie or other fixture. When the sewage from the sewage tank flows out and the water level drops from (L2) to (L1) below the portion where the cable 5 of the float 100 is fixed, the float 100 sags downwards and the switch is turned OFF (or ON). On the contrary, when the sewage flows in and the water level rises from (L1) to (L2), the float 100 floats due to buoyancy and is pushed to the side, and the switch is turned ON (or OFF). -Various control modes such as OFF control, low water level alarm, two motor alternating control and sequential control can be combined.

In FIG. 5, only one float 100 according to the present invention is illustrated, but the plurality of floats 100 according to the present invention are connected to the rope 210 by cables 5 of different lengths, respectively. Of course, it can be located and installed according to the water level.

The operation of the inclined jaw 16 formed on the inner surface of the switch holder 10 will be described with reference to FIGS. 5 and 6.

6 shows a state in which the water level is elevated from (L1) to (L2) shown in FIG. 5, the float 100 according to the present invention has a switch holder (when the water level is low) when the float 100 is inverted. The steel ball 11 inside the 10 is moved toward the upper body 13 of the switch holder 10 so that the switch 14 is contacted by the weight of the steel ball 11. Thereafter, as shown in FIG. 6, the steel ball 11 is moved toward the upper body 13 of the switch holder 10 until the water level reaches a predetermined level, and maintains the contact 15 on the switch 14.

When sewage is generated from the surface when the sewage flows in or out of this state, the float 100 according to the present invention is inclined upward and the angle inclined downward as indicated by the circular arrow 100 Steel ball 11 is caught by the inclined jaw (16) in the range of 10 degrees to 15 degrees inclined angle to prevent movement. Only outside the above-described angle range, the steel ball 11 then moves up the inclined jaw 16 to the opposite side, and at the same time, the contact point of the switch 14 is turned on or off. Accordingly, it is possible to prevent a chattering phenomenon due to the sewage of the sewage.

FIG. 7 is a view for explaining a structure in which a micro switch is mounted on a switch holder constructed in the present invention. FIG. It is also.

As a switch mounted on the switch holder 10 and outputting an ON / OFF state in accordance with the change of the water level, one of the well-known compact micro switch 14 or the sealed tube switch 40 may be selectively used. The switch holder 10 configured in the present invention has a structure in which the micro switch 14 and the seal tube switch 40 can be mounted, respectively.

To this end, as shown in FIG. 7, both side plates 17 are formed on an upper surface of the upper body 13 of the switch holder 10, and the distance between the two side plates 17 is spaced apart from the micro switch 14. The upper surface of the upper body 13 corresponding to the width between the two side plates 17 is open and the other upper surface portion is covered.

Reference numeral 14a shown in (a) of FIG. 7 is a 'terminal' provided in the micro switch 14, and the desired ON or OFF operation is performed in connecting three wires of the cable connected to the controller to the three terminals. You can choose to connect. In addition, reference numeral 18a corresponds to a through hole (not shown) formed in the micro switch 14 as a 'combination hole' formed in both side plates 17, and reference numeral 18b corresponds to both side plates 17. Of the micro-switch 14 by engaging the inner side of the micro-switch 14 when the micro-switch 14 is inserted into the two side plates 17. The contact piece 15 is to be positioned so that it can be operated in the rolling motion by the steel ball 11 in the upper body 13 of the upper side of the switch holder 10.

In FIG. 7, non-explained reference numerals 19a formed on side surfaces facing each other in both side plates 17 are 'first set face', and 19b is 'second set face', which are sealed tube switches ( 40) to the mounting portion, which will be described later with reference to FIG.

As shown by the dashed-dotted line as an imaginary line in Fig. 7B, the micro switch 14 is sandwiched between the two side plates 17 with the contact piece 15 facing downward, and fixed with screws 14b. It can be attached easily by doing so.

Accordingly, as the steel ball 11 moves, the contact piece 15 is pressed or maintained in its original state.

8 is a view showing an embodiment of mounting a sealed tube switch in the switch holder configured in the present invention, (A) drawing is a 2-wire (wire) type A contact (B) drawing is a 2-wire (wire) type B Contacts (C) The figure shows A and B contacts in 3-wire (wire) type.

The sealing tube switch 40 may change the inclination of the float according to the change in the water level to move the iron light powder embedded in the sealing tube to output the contact ON or OFF.

As described above, both side plates 17 on the upper surface of the switch holder 10 are formed in a concave curved surface corresponding to the outer circumferential surface of the sealing tube switch 40 on the side facing each other and positioned on one side ( 19a) and a second settling surface 19b located on the other side.

As shown in (a) of FIG. 8, the seal tube switch 40 is mounted vertically on the first set face 19a located on one side thereof, or (b) the second face is placed on the other side as shown in the drawing. It can attach to 19b. In addition, as shown in (c), each of the first and second mounting surfaces 19a and 19b can be mounted in different on / off directions.

Here, in the brief description of the drawings, the same case as (A) of FIG. 8 is referred to as 'A contact' and (B) as 'B contact' and (C) is referred to as 'A and B contact'. , Which is an expression of ON / OFF state. That is, if contact A is ON, contact B may be OFF.

As described above, the float type level switch according to the present invention has been described with reference to the drawings, but the present invention is not limited by the embodiments and the drawings disclosed herein, but within the scope of the technical idea of the present invention. Of course, various modifications may be made by those skilled in the art.

1 is a cross-sectional view of the float type level switch according to the present invention

2 is an exploded cross-sectional view of a float type level switch according to the present invention;

3 is a plan view of a float housing constructed in the present invention

4 is a view for explaining the operation of the gas outlet configured in the present invention

5 is a state diagram using the float type level switch according to the present invention

6 is an operating state of the float type level switch according to the present invention

FIG. 7 is a view for explaining a structure in which a micro switch is mounted on the switch holder of the present invention, wherein (a) is a plan view showing a cross section taken along line CC of (b), and (b) is a longitudinal cross section of the switch holder. Degree

8 is a view showing an embodiment of mounting a sealed tube switch in the switch holder configured in the present invention, (A) drawing is a 2-wire (wire) type A contact (B) drawing is a 2-wire (wire) type B Contacts (C) The figure shows A and B contacts in 3-wire (wire) type.

<Explanation of symbols for the main parts of the drawings>

1 float housing 2 float cap

3: cylindrical part 4: cable insertion hole

5: cable 6: sealing ring

7: incision 8: reinforcement rib

10: switch holder 11: steel ball

12: lower body 13: upper body

14: micro switch 14a: terminal

15: contact piece 16: inclined surface jaw

17: both side plate 18a: coupling hole

18b: Jamming protrusion 19a: First face

19b: second side face 20: gas discharge hole

21: blocking hole 22: stepped groove

30 float connection part 31 outer protrusion frame

32: Outer part insertion groove 33a, 33b: Screw part

34: inner side insertion groove 35: inner side protruding frame

E1, E2, E3: epoxy molding part

100: float (float type level switch according to the present invention)

200: terminal box 210: rope

220: fixed weight 5a: wire cover removing portion

Claims (5)

The switch mounted in the switch holder 10 installed therein outputs the on / off state by buoyancy according to the change of the water level, and is connected to the controller and the cable installed in the outside so that the water level can be adjusted. In the float type level switch formed by joining the float housing 1 and the float cap 2 to each other, each having an internal space and corresponding openings, The float housing 1 rises upward from the circumferential surface of the opening and has an outer protruding frame 31 having a threaded portion 33a on its outer circumferential surface, and an inner side inserting groove 34 which enters downward along the inner side of the outer protruding frame 31. Is prepared, The float cap 2 enters upwardly so as to have a gap between the outer protruding frame 31 and the outer protruding frame 31 of the float housing 1 on the circumferential surface of the opening and corresponding to the outer protruding frame 31 and the threaded portion 33a of the float housing 1. The outer side insertion groove 32 having a threaded portion 33b on the outer inner circumferential surface and the inner side insertion groove 34 corresponding to the inner side insertion groove 34 of the float housing 1 can be provided with a gap therebetween. The inner protruding frame 35 extending downward is provided, Epoxy molding part E3 formed by hardening by filling an epoxy mold in the inner side insertion groove 34 and the outer side insertion groove 32 formed in the float housing 1 and the float cap 2, respectively, is formed. Float type level switch, characterized in that consisting of. The method of claim 1, A cylindrical portion 3 is formed in the lower portion of the float housing 1, a lower end portion of the switch holder 10 is inserted into the cylindrical portion 3, and a cable insertion hole penetrated through the lower surface of the cylindrical portion 3. A cable 5 is inserted into the cable 5 through the cable 4, and the wires exposed from the cable 5 are connected to a switch mounted on the switch holder 10 so that an epoxy molding portion is formed in the space around the cylindrical portion 3. (E1) is filled and hardened, In the state in which the float housing 1 and the float cap 2 are bonded to each other, in order to discharge the gas generated while the epoxy molding part E1 is cured to the outside, After the gas discharge hole 20 having the stepped groove 22 is penetrated therethrough, and the gas is discharged through the gas discharge hole 20, the blocking hole 21 is coupled to the gas discharge hole 20. Float type level switch, characterized in that the stepped groove 22 is further filled with an epoxy molding part (E2) sealed. The method of claim 2, A wire covering removing portion 5a is formed in which a portion of the exposed wire covering of the cable 5 inserted into the cable 5 is inserted through the cable insertion hole 4, and the wire covering removing portion 5a is formed by the epoxy molding. The float type level switch further comprising an impregnation in the section E1. The method according to any one of claims 1 to 3, The switch holder 10 is formed by dividing the lower body 12 and the upper body 13 while having the internal space in which the steel ball 11 is built and moves, and the inner surface of the upper body 13 and the The inner surface of the lower body 12 is stepped float type level switch, characterized in that the inclined jaw (16) is provided. The method of claim 4, wherein The switch mounted on the switch holder 10 is a micro switch 14, Both side plates 17 are formed on an upper surface of the upper body 13 of the switch holder 10, and an upper surface of the upper body 13 corresponding to the two side plates 17 is opened. The micro switch (14) is a float type level switch, characterized in that the contact piece (15) is inserted between the two side plates (17) while facing downward and fixed with screws (14b).

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