TWI618109B - Improved waterproof structure of cable float level switch - Google Patents

Abstract

The invention provides an improved waterproof structure of a cable type floating ball liquid level switch which can be lifted before the floating ball structure is not affected, the waterproof effect is improved, and the water infiltration is effectively prevented. The technical means comprises: a casing, a cover body, an inductive switch, a cable, and a sleeve body, wherein: the housing is provided with an accommodating space, and one end has an opening; the cover body is screwed at the opening, and the inner top surface is convex The utility model has a screw hole portion and a through hole. The screw hole portion is provided with a bolt and has a guide hole. The inner side of the bolt and the bottom surface of the screw hole portion are provided with a first water stop washer, and the screw hole portion is a groove portion is formed around the edge of the cover body, and a second water stop washer is disposed therein; the induction switch is disposed in the accommodating space; and one end of the cable is pierced through the guide hole and penetrates into the accommodating space; The utility model is electrically connected to the inductive switch, and the other end can be electrically connected to the external device for outputting the signal; the sleeve is sleeved outside the screwing hole portion, and is filled with a waterproof colloid.

Description

Improved waterproof structure of cable float level switch

The invention relates to an improved waterproof structure of a cable type float ball liquid level switch, in particular to a waterproof structure applied to a cable type float ball liquid level switch.

The cable float level switch is a liquid level detecting tool with convenient use, simple structure, safety and good reliability. With the positioning of the weight, the float will change angle with the rise and fall of the liquid level, when the liquid level When the rise or fall changes, the float will also rise or sway. When the float angle exceeds a certain angle, the sense switch in the float will react with the upper and lower angles. The effect of liquid level detection.

Although the float itself is waterproof, the sensor switch needs to pass the signal through the cable, so there must be holes on the float. The current main method of water seepage is to fill the gap between the hole and the cable, but it is liquid. The influence of the environment, the waterproof rubber is prone to aging, the sealing effect is reduced, and the problem of liquid infiltration occurs, and not only the problem of abnormal operation may occur, but also the detection interval of the cable float level switch is shortened, and the use is short. Life expectancy is not as expected.

In view of the above, it is an object of the present invention to provide a waterproof structure for a cable type float ball level switch which solves the aforementioned problems and prolongs the service life and reduces the maintenance cost.

The object of the present invention is to provide an improved waterproof structure of a cable type float ball level switch which can be lifted without affecting the structure of the float ball, which improves the waterproof effect and effectively prevents water from penetrating.

In order to solve the above problems and achieve the object of the present invention, the technical means of the present invention is realized by the improved waterproof structure of a cable type float ball level switch, which comprises a casing (1) and a cover body (2). , an inductive switch (3), a cable (4), and a set of bodies (5), characterized in that: the housing (1) is provided with an accommodation space (11), and one end has an opening (12); the cover body (2) is screwed to the opening (12), the inner top surface is convexly provided with a screw hole portion (21), and has a through hole (211), the screw hole The inner portion of the portion (21) is provided with a bolt (22) and has a guide hole (221) corresponding to the through hole (211), and the inner end of the bolt (22) and the bottom surface of the screw hole portion (21) a first water stop washer (23) is provided to allow the screw hole portion (21) and the bolt (22) to be screwed to each other and to be closely engaged with the bolt (22), the screw hole portion ( 21) forming a groove portion (24) around the edge of the cover body (2), the groove portion (24) is provided with a second water stop washer (25), and the cover body (2) and the When the casings (1) are screwed to each other, they are tightly engaged with the corresponding edges of the openings (12); Off (3), which is disposed in the accommodating space (11); the cable (4) has one end from the through hole (211), and penetrates through the guide hole (221) to the accommodating The space (11) is electrically connected to the inductive switch (3), and the other end can be electrically connected to the external device (A) for outputting a signal; the casing (5) is sleeved to the screwing The hole portion (21) is outside and is filled with a waterproof colloid (10).

More preferably, the inductive switch (3) is a mercury switch.

More preferably, the housing (1) is one of the following: a plastic housing, a stainless steel housing; the cover (2) is one of the following: a plastic cover, a stainless steel cover .

More preferably, a sealing layer (20) is further disposed on the screw joint of the casing (1) and the cover body (2).

Compared with the prior art, the functions and effects of the present invention are as follows:

In the present invention, the bolt (22) and the first water stop washer (23) are matched with the second water stop washer (25), and the housing (1) and the cover body (2) are screwed together, and the sleeve is added. The combination of the body (5) and the waterproof colloid (10) constitutes a triple waterproof structure, and the waterproof capability of the cable float level switch is obtained. Improvement, the overall structure is not complicated, but it can effectively improve the waterproof effect, protect the internal devices, and extend the overall service life, further reducing maintenance costs.

1‧‧‧shell

11‧‧‧ accommodating space

12‧‧‧ openings

2‧‧‧ cover

21‧‧‧ screw hole

211‧‧‧Perforation

22‧‧‧ bolt

221‧‧‧ Guide hole

23‧‧‧First water stop washer

24‧‧‧ Groove

25‧‧‧Second water stop washer

3‧‧‧Sensor switch

4‧‧‧ cable

5‧‧‧ Socket

10‧‧‧Waterproof colloid

20‧‧‧Waterproof layer

Figure 1 is a perspective view of the present invention.

Fig. 2 is a perspective exploded view of the present invention.

Figure 3 is a schematic cross-sectional view of the present invention.

Figure 4 is a schematic perspective view of the present invention.

The following is a detailed description of the following embodiments according to the drawings:

As shown in FIG. 1 to FIG. 4, the figure shows an improved waterproof structure of a cable type float ball level switch, which comprises a casing (1), a cover body (2), and an inductive switch ( 3), a cable (4), and a set of body (5), characterized in that: the housing (1) is provided with an accommodation space (11), and one end has an opening (12); The cover body (2) is screwed to the opening (12), the inner top surface is convexly provided with a screw hole portion (21), and has a through hole (211), and the screw hole portion (21) is screwed a bolt (22) is provided, and has a guide hole (221) corresponding to the through hole (211). The inner end of the bolt (22) and the bottom surface of the screw hole portion (21) are provided with a first stop. a water washer (23) for tightly engaging a corresponding portion of the bolt (22) when the screw hole portion (21) and the bolt (22) are screwed to each other, the screw hole portion (21) and the cover body (2) a groove portion (24) is formed around the edge, and a second water stop gasket (25) is disposed in the groove portion (24), and the cover body (2) and the casing (1) can mutually When the screwing is performed, the edge is closely engaged with the corresponding edge of the opening (12); the inductive switch (3) is disposed in the receiving space (11); The cable (4) has one end penetrated by the through hole (211), penetrates into the accommodating space (11) through the guiding hole (221), and is electrically connected to the sensing switch (3), and the other end can The outer casing (A) is electrically connected to the output signal; the casing (5) is sleeved outside the screw hole portion (21), and is filled with a waterproof colloid (10).

Wherein, the second water stop washer is matched by the screwing of the housing (1) and the cover body (2) (25), which constitutes the first waterproofing, and the screwing hole portion (21) and the bolt (22) are screwed together with the first water stopping washer (23) to form a second waterproofing, and then the casing (5) And the waterproof colloid (10), which constitutes three waterproof measures, can provide an effective and efficient waterproof performance at a low cost under the premise of excessively affecting the structure, and the uncomplicated structure not only effectively protects the internal device, Moreover, the overall service life is extended, and the maintenance cost can be further reduced, so that the water leakage problem of the conventional cable type float ball level switch can be solved.

Secondly, the use of screwing as the main connection means, in addition to improving the waterproof efficiency, is quickly detected when the combination is abnormal, which is conducive to assembly and maintenance. At the same time, under different pressure conditions, it is not easy to have Problems caused by damage or separation due to pressure.

Furthermore, through the application of the sleeve (5) and the waterproof colloid (10), the bolt (22) and the screw hole portion (21) are more tightly combined, further ensuring that the water vapor cannot penetrate from the gap, so that the second Road waterproofing and third waterproofing can produce a multiplier effect, and the waterproof effect is excellent, so that the internal temperature is kept at a certain degree of dryness, and the induction switch (3) can be directly fixed, so that the inductive switch (3) can be protected and the induction is made. The switch (3) can be operated normally while avoiding damage due to accidental collision or vibration during transportation, installation or maintenance.

In the above, the inductive switch (3) is a mercury switch.

Among them, the application of the mercury switch can reduce the cost, and with the application of the waterproof colloid (10), the problem that the mercury switch is easily damaged can be effectively solved, and the mercury switch can be completely protected, and there is no need to worry about abnormal operation. The problem arises.

In the above, the housing (1) is one of the following: a plastic housing, a stainless steel housing; and the cover (2) is one of the following: a plastic cover, a stainless steel cover.

Among them, the casing (1) and the lid body (2) can be applied in various materials such as plastic or stainless steel according to requirements in order to be applicable to various liquid environments.

Referring to FIG. 3, the housing (1) and the cover (2) are screwed together. A waterproof rubber layer (20).

Among them, through the application of the waterproof rubber layer (20), the housing (1) and the cover body (2) are more tightly combined to ensure that the water gas cannot penetrate from the gap, and the first road waterproofing is more stable.

The embodiments, features, and effects of the present invention are described in detail above with reference to the embodiments shown in the drawings. However, the above description is only a preferred embodiment of the present invention, but the present invention is not limited to the scope of the present invention. Modifications that are consistent with the intent of the present invention are intended to fall within the scope of the invention as long as they are within the scope of the invention.

Claims (4)

An improved waterproof structure of a cable type float ball level switch, comprising a casing (1), a cover body (2), an inductive switch (3), a cable (4), and a set body (5), The housing (1) is provided with an accommodating space (11), and has an opening (12) at one end; the cover body (2) is screwed at the opening (12) The inner top surface is convexly provided with a screw hole portion (21) and has a through hole (211). The screw hole portion (21) is internally provided with a bolt (22) and has a corresponding hole (211). a guide hole (221), between the inner end of the bolt (22) and the bottom surface of the screw hole portion (21), a first water stop washer (23) is provided to allow the screw hole portion (21) and When the bolts (22) are screwed together, they are tightly engaged with the bolts (22), and a groove portion (24) is formed around the screw hole portion (21) and the edge of the cover body (2). a second water stop washer (25) is disposed in the groove portion (24), and can be tightly engaged with the corresponding edge of the opening (12) when the cover body (2) and the housing (1) are screwed together; An inductive switch (3) disposed in the accommodating space (11); the cable (4) having one end at the perforation (211) Passing through the guiding hole (221) and penetrating into the accommodating space (11), and being electrically connected to the sensing switch (3), and the other end can be electrically connected to the external device (A) for outputting signals; The sleeve body (5) is sleeved outside the screw hole portion (21) and is filled with a waterproof colloid (10). The improved waterproof structure of the cable type float ball level switch according to claim 1, wherein the inductive switch (3) is a mercury switch. The improved waterproof structure of the cable type float ball level switch according to claim 2, wherein: the housing (1) is one of the following: a plastic case, a stainless steel case; and the cover body (2) ), which is one of the following: a plastic cover, a stainless steel cover. The improved waterproof structure of the cable-type float ball level switch according to claim 3, wherein: the screw joint of the casing (1) and the cover body (2) is further provided with a waterproof rubber layer (20).