Electrode liquid level switch

Abstract

The utility model discloses an electrode liquid level switch, relates to the technical field of liquid level switches, and aims to solve the problems that in the prior art, an electrode is exposed outside, no protective structure exists outside the electrode, the electrode is still conducted by dirt, and false alarm is caused, and adopts the technical scheme that a connector is arranged at the top of a shell, and the bottom of the shell is fixedly connected with a base; the base comprises a plastic seat, two protection cavities are formed in the plastic seat, exhaust holes are formed in the side faces of the protection cavities, electrodes are arranged in the protection cavities, a metal seat is arranged on the plastic seat, an anti-falling structure is arranged between the metal seat and the plastic seat, a circuit board is fixed to the plastic seat, the electrodes are electrically connected with the circuit board, and the circuit board is electrically connected with a connector. The two electrodes are separated through the two protection cavities, large foreign matters on the water surface are prevented from being attached to the two electrodes, the two electrodes are prevented from being communicated, false alarm is avoided, the exhaust holes are formed in the lower ends of the electrodes and are not lower than the electrodes, and it is avoided that the tops of the electrodes make contact with water, the foreign matters on the tops of the electrodes are difficult to clean, and alarm is affected.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid level switches, and specifically relates to an electrode liquid level switch. Background Art

[0002] For the currently used electrode liquid level switches, the electrodes and the bases for fixing the electrodes adopt a split structure. An insulating and isolating plastic part is arranged between the electrodes and the bases. The plastic part is installed in the holes of the bases, and the electrodes are installed in the plastic parts. The problem with this structural method is that the sealing performance between the plastic parts and the bases, as well as between the electrodes and the plastic parts, is relatively poor. Most of the sealing grades can only reach IP65. Generally, it is required that the liquid level of the measured liquid cannot be higher than the root of the electrodes. When the liquid level is higher than the entire liquid level switch, it will cause the liquid level switch to enter water, resulting in failures or scrapping. In addition, for the current liquid level switches, the electrodes are exposed outside, and there is no protective structure outside the electrodes. When the measured liquid is relatively dirty, after the liquid level reaches the electrode position, the dirt will be left on the electrodes. After the liquid level drops, the dirt still conducts the electrodes, resulting in false alarms. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide an electrode liquid level switch, which can effectively solve the problems in the background art.

[0004] To achieve the above purpose, the utility model discloses an electrode liquid level switch. The technical solution adopted is that it includes a housing and a base. There is a connector at the top of the housing. The housing and the connector are connected by laser welding to ensure the sealing performance between the two. The bottom of the housing is fixedly connected to the base. The housing and the metal seat of the base are connected by laser welding to ensure the sealing performance between the two. The base includes a plastic seat. Two protection cavities are opened in the plastic seat. Exhaust holes are opened on the sides of the protection cavities. Electrodes are arranged in the protection cavities. There is a metal seat on the plastic seat. There is an anti-detachment structure between the metal seat and the plastic seat. A circuit board is fixed on the plastic seat. The electrodes are electrically connected to the circuit board, and the circuit board is electrically connected to the connector.

[0005] As a preferred technical solution of the utility model, the plastic seat integrally forms a whole by connecting the electrodes, the metal seat and the plastic seat, ensuring the sealing performance between the plastic seat, the electrodes and the metal seat.

[0006] As a preferred technical solution of the utility model, anti-detachment bosses are arranged on the outer sides of the electrodes and the metal seat, and anti-detachment grooves are opened on the outer sides of the electrodes and the bottoms of the metal seat, so that when the plastic seat is injection-molded, anti-detachment grooves and anti-detachment platforms are formed according to the anti-detachment bosses and the anti-detachment grooves.

[0007] As a preferred technical solution of the present utility model, an anti-detachment groove matching with the anti-detachment boss and an anti-detachment platform matching with the anti-detachment concave groove are provided on the plastic seat. The anti-detachment boss and the anti-detachment groove are used to increase the radial connection strength between the plastic seat, the metal seat and the electrode, preventing separation. The anti-detachment groove and the anti-detachment concave groove are used to prevent rotation between the plastic seat, the metal seat and the electrode.

[0008] As a preferred technical solution of the present utility model, a threaded joint is provided inside the plastic seat. The circuit board is connected to the metal seat and the plastic seat through a fixing bolt and the threaded joint for fixing the circuit board.

[0009] As a preferred technical solution of the present utility model, the exhaust hole is located at the lower end of the electrode and on the plastic seat not lower than the position of the electrode. The exhaust hole communicates the protection cavity with the outside world. When water submerges the exhaust hole, the gas inside the protection cavity cannot be discharged, thereby preventing the cavity inside the protection cavity from being filled with water, keeping the water level at the exhaust hole, and preventing the electrode from contacting water over a large area, resulting in stains on the top of the motor that are difficult to clean.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows: The present utility model separates the two electrodes through the two protection cavities, preventing large foreign objects on the water surface from adhering to the two electrodes, resulting in the connection of the two electrodes and thus false alarms. By arranging the exhaust hole at the lower end of the electrode and not lower than the position of the electrode, it is avoided that the top of the electrode contacts water, resulting in difficult cleaning of foreign objects on the top of the electrode and affecting the alarm due to the attached foreign objects. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic structural diagram of the present utility model Figure 1 ;

[0012] Figure 2 is a schematic structural diagram of the present utility model Figure 2 ;

[0013] Figure 3 is a sectional view of the present utility model;

[0014] Figure 4 is a sectional view of the plastic seat of the present utility model;

[0015] Figure 5 is a partial sectional view of the present utility model.

[0016] In the figure: 1. Outer shell; 2. Base; 3. Plastic seat; 301. Threaded joint; 302. Protection cavity; 303. Exhaust hole; 304. Anti-detachment groove; 305. Anti-detachment platform; 4. Metal seat; 5. Circuit board; 6. Fixing bolt; 7. Electrode; 8. Connector; 9. Anti-detachment boss; 10. Anti-detachment groove. Specific implementation mode

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Embodiment 1

[0018] As Figures 1 to 5 shown, the present invention discloses an electrode liquid level switch. The technical solution adopted is that it includes an outer shell 1 and a base 2. The top of the outer shell 1 is connected to a connector 8 by laser welding. The base 2 includes a plastic seat 3 and a metal seat 4. A protection cavity 302 is opened inside the plastic seat 3. An electrode 7 is arranged in the protection cavity 302. An exhaust hole 303 is opened on the plastic seat 3 at the lower side position of the electrode 7. The exhaust hole 303 is not lower than the lowest end of the electrode 7. The exhaust hole 303 connects the protection cavity 302 with the outside. Anti-detachment bosses 9 are provided on the electrode 7 and the metal seat 4. Anti-detachment grooves 10 are opened at the anti-detachment bosses 9 of the electrode 7 and the bottom of the metal seat 4 as Figure 4 shown. The plastic seat 3 is integrally formed and connected to the electrode 7 and the metal seat 4. When the plastic seat 3 is formed, an anti-detachment groove 304 and an anti-detachment platform 305 will be formed according to the anti-detachment bosses 9 and the anti-detachment grooves 10. Threaded joints 301 are mirror-symmetrically arranged inside the plastic seat 3. A circuit board 5 is connected to the metal seat 4 and the plastic seat 3 together by a fixing bolt 6 on the threaded joint 301. The electrode 7 is electrically connected to the circuit board 5, and the circuit board 5 is electrically connected to the connector 8.

[0019] Working principle of the utility model: Place the electrode liquid level switch at a specified height on the water surface. The connector 8 is connected to an external alarm system. When the water level rises, the gas inside the protection chamber 302 is discharged through the exhaust hole 303. When the water level rises until it touches the electrode 7, the two electrodes 7 are connected. The circuit board 5 sends the collected water level signal to the alarm system through the connector 8, and the alarm system issues an alarm signal. When the water level is lower than the electrode 7, the two electrodes 7 are no longer connected, and the alarm stops simultaneously. When the water level continues to rise until it submerges the exhaust hole 303, the gas inside the protection chamber 302 cannot be discharged, thereby preventing the cavity inside the protection chamber 302 from being filled with water, keeping the top of the protection chamber 302 clean, and preventing debris from adhering and being difficult to clean.

[0020] The circuit and mechanical connections involved in the utility model are common means adopted by those skilled in the art and can obtain technical inspiration through a limited number of tests, belonging to common general knowledge.

[0021] The components not described in detail in this article are prior art.

[0022] Although the embodiments of the utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the utility model. The scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. An electrode liquid level switch, characterized in that: It includes a housing (1) and a base (2). There is a connector (8) at the top of the housing (1). The bottom of the housing (1) is fixedly connected to the base (2). The base (2) includes a plastic base (3). Two protection cavities (302) are provided in the plastic base (3). Exhaust holes (303) are provided on the side of the protection cavity (302). There is an electrode (7) in the protection cavity (302). There is a metal base (4) on the plastic base (3). There is an anti-detachment structure between the metal base (4) and the plastic base (3). A circuit board (5) is fixed on the plastic base (3). The electrode (7) is electrically connected to the circuit board (5). The circuit board (5) is electrically connected to the connector (8).

2. The electrode liquid level switch according to claim 1, wherein: The plastic base (3) integrally forms to connect the electrode (7), the metal base (4) and the plastic base (3) into a whole.

3. The electrode liquid level switch according to claim 2, wherein: Anti-detachment bosses (9) are provided on the outer sides of the electrode (7) and the metal base (4). Anti-detachment grooves (10) are provided on the outer side of the electrode (7) and the bottom of the metal base (4).

4. The electrode liquid level switch according to claim 3, characterized in that: There are anti-detachment grooves (304) on the plastic base (3) that cooperate with the anti-detachment bosses (9) and anti-detachment platforms (305) that cooperate with the anti-detachment grooves (10).

5. An electrode liquid level switch according to claim 1, characterized in that: A threaded joint (301) is provided in the plastic base (3). The circuit board (5) is connected to the metal base (4) and the plastic base (3) through fixing bolts (6) and the threaded joint (301).

6. The electrode liquid level switch according to claim 1, wherein: The exhaust holes (303) are located at the lower end of the electrode (7) and on the plastic base (3) not lower than the position of the electrode (7). The exhaust holes (303) connect the protection cavity (302) to the outside.

Images