CN102723232B - Liquid level switch - Google Patents

Abstract

The invention discloses a liquid level switch for measuring the liquid level in a container, which comprises a pillar, a lever, a floating ball and an electric signal device, wherein the lever is arranged at the top of the pillar; the floating ball is arranged at the top of the pillar One end of the lever; the connection of the trigger device of the electric signal device and the lever, the triggered device of the electric signal device is located outside the container, and the trigger device can move to The position where the triggering device is triggered. The improvement of the liquid level switch in the present invention is that the triggered device is arranged outside the container, which prevents the triggered device from being corroded by the liquid or gas in the container, ensures the service life of the triggered device, and is compatible with the triggered device The connected two wires will also move to the outside of the container as the triggered device is arranged outside the container, and will not be corroded by the liquid or gas in the container, reducing the probability of short circuit.

Description

a liquid level switch

technical field

The invention relates to the technical field of liquid level measurement, in particular to a liquid level switch.

Background technique

The liquid level switch refers to the switch used to control the liquid level, that is, the height of the liquid level. The electrical signal device of the liquid level switch includes a trigger device and a triggered device. Generally, the triggered device and the trigger device are set in the container Inside, please refer to Figure 1, Figure 1 is a schematic structural diagram of a liquid level switch in the prior art, the liquid level switch includes a pillar 105, and a probe tube is arranged inside the pillar 105, and a trigger device dry spring is arranged inside the probe tube When the tube 106 and the dry reed switch 106 are closed, they are connected to the external circuit through two wires. After the external circuit is connected, relevant electrical signals can be sent out. A lever 103 is arranged on the top of the pillar 105, and the lever 103 can flexibly rotate around the top of the pillar 105. One end of the lever 103 is provided with a floating ball 102 or a buoy, and the other end of the lever 103 is equipped with a trigger device magnet 104, when the magnet 104 is close to the reed switch 106, the reed switch 106 can be closed. When using the liquid level switch, the floating ball 102 is placed in the container through the pillar 105. When the liquid level 101 in the container rises to a certain height, it will contact the floating ball 102, and the liquid level 101 will lift the floating ball 102, and the floating ball will 102 drives the lever 103 to rotate around the top of the pillar 102, and the magnetic steel 104 at the other end of the lever 103 is close to the reed switch 106 in the probe tube, and the contact part of the reed of the reed switch 106 will be attracted by the magnetic force of the magnetic steel 104. When the attractive force is greater than the elastic force of the spring, the contacts will be closed, and the reed switch 106 will be closed to communicate with an external circuit and send out an electrical signal.

Since the probe tube has been in a container containing liquid for a long time, the probe tube is easily corroded and ruptured after long-term use, causing liquid or gas to enter the probe tube, corroding the reed switch 106 in the probe tube and the connection with the reed switch 106. Two wires will reduce the service life of the reed switch 106, and short circuit is easy to occur simultaneously.

Therefore, how to provide a liquid level switch that prevents the triggered device and the two wires connected to the triggered device from being corroded is currently a technical problem to be solved urgently by those skilled in the art.

Contents of the invention

In view of this, the object of the present invention is to provide a liquid level switch to prevent the reed switch from being corroded.

In order to achieve the above object, the present invention provides the following technical solutions:

A liquid level switch for measuring the liquid level in a container, comprising a pillar, a lever, a floating ball and an electrical signal device, wherein the lever is arranged at the top of the pillar; the floating ball is arranged at the top of the lever One end; the connection between the trigger device of the electric signal device and the lever, the triggered device of the electric signal device is located outside the container, and the trigger device can move to make the triggered device when the lever rotates The position where the trigger device fires.

Preferably, the triggering device is a magnet, and the triggered device is a reed switch.

Preferably, the liquid level switch further includes a first link and a second link, wherein the lever is hinged to one end of the first link, and the other end of the first link is hinged to the second link. One end of the rod is hinged, the other end of the second connecting rod is fixed with the magnetic steel, and the second connecting rod is located inside the pillar.

Preferably, a slidable support for fixing the second connecting rod is provided inside the support, and the support is used to prevent the magnetic steel from contacting the support.

Preferably, the other end of the lever is hinged to one end of the first connecting rod, and the magnetic steel is located on the upper part of the reed switch.

Preferably, one end of the lever provided with a floating ball is hinged to the first connecting rod, and the magnetic steel is located at the lower part of the reed switch.

Preferably, the liquid level switch further includes a third connecting rod, the lever is hinged to one end of the third connecting rod, and the other end of the third connecting rod is provided with a magnetic steel.

Preferably, the other end of the lever is hinged to one end of the third connecting rod, and the magnetic steel is located on the upper part of the reed switch.

Preferably, one end of the lever provided with a floating ball is hinged to the third connecting rod, and the magnetic steel is located at the lower part of the reed switch.

The liquid level switch provided by the present invention is used to measure the liquid level in the container, including a pillar, a lever, a float and an electrical signal device, wherein the lever is arranged on the top of the pillar; the float is arranged on the One end of the lever; the triggering device of the electric signal device is connected to the lever, the triggered device of the electric signal device is located outside the container, and the triggering device can move to make the Describe the position triggered by the trigger device. When the liquid level in the container rises to a certain height, it contacts the floating ball, and the liquid level lifts the floating ball, and the floating ball drives the lever to rotate around the top of the pillar, driving the trigger device connected to the lever to move. When the trigger device moves enough to trigger When the position of the triggered device is reached, the triggered device connects the external circuit and sends out an electrical signal.

The improvement of the liquid level switch in the present invention is that the triggered device is arranged outside the container, and the trigger device that can be triggered by the triggered device is set to be connected with the lever, and the trigger device can move to make the triggered device when the lever rotates. The trigger position of the trigger device, while ensuring the normal operation of the liquid level switch, prevents the triggered device from being corroded by the liquid or gas in the container, ensuring the service life of the triggered device, and the two wires connected to the triggered device It will also move to the outside of the container as the triggered device is arranged outside the container, and will not be corroded by the liquid or gas in the container, reducing the probability of short circuit.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are For some embodiments of the present invention, those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a structural schematic diagram of a liquid level switch in the prior art;

Fig. 2 is a schematic structural view of the liquid level switch provided by the embodiment of the present invention, where the magnetic steel is located on the upper part of the reed switch;

Fig. 3 is a structural schematic diagram of a liquid level switch provided by an embodiment of the present invention, in which the magnet steel is located at the lower part of the reed switch.

In Figure 1-3 above:

Liquid surface 101, floating ball 102, lever 103, magnetic steel 104, pillar 105, reed switch 106, liquid surface 201, lever 202, first connecting rod 203, floating ball 204, support member 205, second connecting rod 206, Reed switch 207, magnetic steel 208, pillar 209.

Detailed ways

The embodiment of the present invention provides a liquid level switch, which prevents the dry reed switch from being corroded.

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The present invention provides a liquid level switch, which is used to measure the liquid level 201 in the container, comprising a pillar 209, a lever 202, a float 204 and an electrical signal device, wherein the lever 202 is arranged on the top of the pillar 209; the float 204 is arranged on One end of the lever 202; the connection between the trigger device of the electric signal device and the lever 202, the triggered device of the electric signal device is located outside the container, and the trigger device can move to the position triggered by the trigger device when the lever 202 rotates.

When the liquid level 201 in the container rises to a certain height, it contacts with the floating ball 204, the liquid level 201 holds up the floating ball 204, and the floating ball 204 drives the lever 202 to rotate around the top of the pillar 209, driving the trigger device connected with the lever 202 to move , when the triggering device moves to the position where the triggered device is triggered, the triggered device communicates with the external circuit and sends out a corresponding electrical signal.

The improvement of the liquid level switch in the present invention is that the triggered device is arranged outside the container, and the trigger device that can be triggered by the trigger device is set to be connected with the lever 202, and the trigger device can move to The position triggered by the triggering device, while ensuring the normal operation of the liquid level switch, avoids the corrosion of the triggered device by the liquid or gas in the container, ensures the service life of the triggered device, and the two devices connected to the triggered device The wire will also move to the outside of the container as the triggered device is arranged outside the container, and will not be corroded by the liquid or gas in the container, reducing the probability of short circuit.

Specifically, the triggering device is a magnet 208 , and the triggered device is a reed switch 207 . When the liquid level 201 in the container rises to a certain height, it contacts the floating ball 204, the liquid level 201 holds up the floating ball 204, and the floating ball 204 drives the lever 202 to rotate around the top of the pillar 209, driving the magnetic steel 208 connected with the lever 202 When the magnetic steel 208 moves to the position where the reed switch 207 is closed, the reed switch 207 is closed and the external circuit is connected. The electrical signal device provided in the embodiment of the present invention may also be other devices capable of generating electrical signals, and the electrical signal device is not limited.

Specifically, the liquid level switch further includes a first connecting rod 203 and a second connecting rod 206, wherein the lever 202 is hinged to one end of the first connecting rod 203, and the other end of the first connecting rod 203 is connected to one end of the second connecting rod 206. Hinged, the other end of the second connecting rod 206 is fixed with a magnetic steel 208 , and the second connecting rod 206 is located inside the pillar 209 . In this way, the second connecting rod 206 transports the magnetic steel 208 to the position that can make the reed switch 207 close from the inside of the pillar 209, without other passages. When it is in a container or a high-pressure airtight container, it is beneficial to ensure the airtightness of the airtight container.

The second connecting rod 206 can send the magnetic steel 208 to the position where the reed switch 207 can be closed through linear displacement, and can also send the magnetic steel 208 to the position where the reed switch 207 can be closed after a certain angle of rotation. For example, a connecting rod is hinged at an end that is not connected with the lever 202 in the second connecting rod 206, the hinge of the second connecting rod 206 and the connecting rod is fixed, and then the end of the connecting rod that is not hinged with the second connecting rod 206 Installing the magnetic steel 208 can realize the rotation of a certain angle and send the magnetic steel 208 to a position where the reed switch 207 can be closed. The embodiment of the present invention does not limit the specific movement trajectory of the second connecting rod 206 .

In order to further optimize the above solution, a slidable support 205 for fixing the second link 206 is provided inside the pillar 209 , and the support 205 is used to prevent the magnetic steel 208 from contacting the pillar 209 . The support member 205 can be a long plate with a circular groove at one end, the circular groove is used to fix the second connecting rod 206, the second connecting rod 206 can slide in the circular groove, and the other end of the long plate is fixed on On the inner inner wall of the pillar 209, the support member 205 can also be a circular plate covering the cross-section of the inner wall of the pillar 209, the circumference of the circular plate is fixed on the inner wall of the pillar 209, and the center of the circular plate is provided with a through hole for the second connection Rod 206 is slidable therethrough. The support member 205 can keep the second connecting rod 206 on a certain track, and when the second connecting rod 206 slides in the inside of the pillar 209, the magnetic steel 208 on the second connecting rod 206 will keep a certain distance with the inner wall of the pillar 209. The distance will not collide with the inner wall of the pillar 209, prolonging the service life of the magnetic steel 208, and at the same time, there will be no second connecting rod 206 caused by the unstable trajectory of the second connecting rod 206, or the second connecting rod 206 is too inclined when moving. A phenomenon in which the rod 206 gets stuck in the interior of the strut 209 .

In a specific implementation manner, please refer to FIG. 2 , which is a schematic structural diagram of a liquid level switch provided by an embodiment of the present invention in which the magnet steel is located on the upper part of the reed switch. The other end of the lever 202 is hinged to one end of the first connecting rod 203 , and the magnetic steel 208 is located on the top of the reed switch 207 . When the liquid level 201 in the container rises to a certain height, it contacts the floating ball 204, and the liquid level 201 lifts the floating ball 204, and the floating ball 204 drives the lever 202 to rotate around the top of the pillar 209, and drives the second end connected to the other end of the lever 202. A connecting rod 203 moves downward, and the first connecting rod 203 pulls the second connecting rod 206 to move downward, so the magnetic steel 208 on the top of the reed switch 207 on the second connecting rod 206 also moves downward. In the closed position of the dry reed switch 207, the dry reed switch 207 is closed and connected to an external circuit.

In another specific embodiment, one end of the lever 202 provided with the floating ball 204 is hinged to the first connecting rod 203 , and the magnetic steel 208 is located at the lower part of the reed switch 207 . When the liquid level 201 in the container rises to a certain height, it contacts the floating ball 204. The liquid level 201 lifts the floating ball 204, and the floating ball 204 drives the lever 202 to rotate around the top of the pillar 209. Because the first connecting rod 203 and the lever 202 One end provided with the floating ball 204 is connected, so the first connecting rod 203 will also move upwards, and the first connecting rod 203 pulls the second connecting rod 206 to move upwards, so the part on the second connecting rod 206 located at the bottom of the reed switch 207 The magnetic steel 208 also moves upwards to a position where the reed switch 207 can be closed, and the reed switch 207 is closed to communicate with an external circuit.

Specifically, the lever 202 is hinged to one end of the third connecting rod, and the other end of the third connecting rod is provided with a magnetic steel 208 . When the liquid level switch provided by the present invention is used in a non-closed container, only one connecting rod can be used to reduce the production cost, and at the same time, the structure is relatively simple and easy to produce.

In a specific implementation manner, please refer to FIG. 3 . FIG. 3 is a schematic structural diagram of a liquid level switch provided by an embodiment of the present invention where the magnet steel is located at the lower part of the reed switch. The other end of the lever 202 is hinged to one end of the third connecting rod, and the magnetic steel 208 is located on the top of the reed switch 207 . When the liquid level 201 in the container rises to a certain height, it contacts the floating ball 204, and the liquid level 201 lifts the floating ball 204, and the floating ball 204 drives the lever 202 to rotate around the top of the pillar 209, and drives the second end connected to the other end of the lever 202. The three connecting rods move downward, so the magnetic steel 208 on the upper part of the reed switch 207 on the third connecting rod also moves downward to a position where the reed switch 207 can be closed, and the reed switch 207 is closed to communicate with the outside. circuit.

In another specific embodiment, one end of the lever 202 provided with the floating ball 204 is hinged to the third connecting rod, and the magnetic steel 208 is located at the lower part of the reed switch 207 . When the liquid level 201 in the container rises to a certain height, it contacts the floating ball 204, and the liquid level 201 holds up the floating ball 204, and the floating ball 204 drives the lever 202 to rotate around the top of the pillar 209. Since the third connecting rod and the lever 202 are arranged One end of the floating ball 204 is connected, so the third connecting rod will also move upwards, so the magnetic steel 208 located at the bottom of the reed switch 207 on the third connecting rod also moves upwards, moving to the point where the reed switch 207 can be closed. position, the reed switch 207 is closed and connected to the external circuit.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (3)

1. A level switch for measuring a liquid level (201) in a container, comprising a post (209), a lever (202), a float (204) and an electrical signal device, wherein the lever (202) is arranged at the top end of the post (209); the floating ball (204) is arranged at one end of the lever (202); the triggering device of the electrical signal device is connected with the lever (202),

characterized in that the triggered device of the electrical signal device is located outside the container, the triggering device being movable to a position in which it triggers the triggered device when the lever (202) is rotated,

the triggering device is magnetic steel (208), and the triggered device is a reed switch (207);

the device is characterized by further comprising a first connecting rod (203) and a second connecting rod (206), wherein the lever (202) is hinged to one end of the first connecting rod (203), the other end of the first connecting rod (203) is hinged to one end of the second connecting rod (206), the magnetic steel (208) is fixed to the other end of the second connecting rod (206), the second connecting rod (208) is located inside the support column (209),

a supporting piece (205) which can be used for fixing the second connecting rod (206) in a sliding way is arranged inside the supporting column (209), the supporting piece (205) is used for preventing the magnetic steel (208) from contacting with the supporting column (209),

the other end of the lever (202) is hinged with one end of the first connecting rod (203), the magnetic steel (208) is positioned at the upper part of the reed pipe (207), or one end of the lever (202) provided with a floating ball (204) is hinged with the first connecting rod (203), and the magnetic steel (208) is positioned at the lower part of the reed pipe (207);

or,

still include the third connecting rod, lever (202) are articulated with the one end of third connecting rod, the other end of third connecting rod is provided with magnet steel (208).

2. The liquid level switch according to claim 1, wherein the other end of the lever (202) is hinged to one end of the third link, and the magnetic steel (208) is located at the upper part of the reed pipe (207).

3. The liquid level switch according to claim 1, wherein the end of the lever (202) provided with the floating ball (204) is hinged with the third link, and the magnetic steel (208) is located at the lower part of the reed pipe (207).