CN212322902U

CN212322902U - Double-liquid-level control switch

Info

Publication number: CN212322902U
Application number: CN202021314464.7U
Authority: CN
Inventors: 汪斌; 华光明; 张敏
Original assignee: Qinghuan Tuoda Suzhou Environmental Technology Co ltd
Current assignee: Qinghuan Tuoda Suzhou Environmental Technology Co ltd
Priority date: 2020-07-07
Filing date: 2020-07-07
Publication date: 2021-01-08
Anticipated expiration: 2030-07-07

Abstract

The utility model relates to a two liquid level control switch, include: the switch body comprises a first atmosphere cavity, an air pressure action cavity and a second atmosphere cavity, the first atmosphere cavity and the second atmosphere cavity are communicated with the outside air, and the air pressure action cavity is communicated with the inflator through a pipeline. This double-liquid-level control switch, through fixed inflator in stock solution space, along with the liquid level change, the gas in the inflator is sent into the switch body, acts on the change of intracavity atmospheric pressure through atmospheric pressure, and then makes the reed swing to realized high, low liquid level signal acquisition, not only liquid level information gathers the accuracy, does not receive the influence of filth in the stock solution space, need not to insert the circuit in the stock solution space moreover, thereby avoided circuit fault, the reduction is maintained the degree of difficulty and is costed.

Description

Double-liquid-level control switch

Technical Field

The utility model relates to a liquid level switch field especially relates to a two liquid level control switch that is used for liquid level signal to gather in sewage collection well.

Background

The liquid level signal of the existing sewage collecting well is collected by adopting a floating ball type liquid level controller, a floating ball floats on the water surface and rises along with the rise of the liquid level, the floating ball controller respectively sends off open and closed electric signals at preset critical points of low liquid level and high liquid level, and the electric signals are used as the signals of a low liquid level point and a high liquid level point of the liquid level.

The critical point of the electric signal conversion is preset manually, the adjustment is troublesome and the precision cannot be ensured; the floating ball can influence the floating of the floating ball after being attached by dirt in the collecting well, so that the position of a critical point is influenced; the floating ball type liquid level controller needs to have an electric wire in a collecting well, is easy to generate circuit faults and is difficult to overhaul.

SUMMERY OF THE UTILITY MODEL

For solving the low problem that just need connect circuit trouble to having taken place in the stock solution space of current floater liquid level controller precision, the utility model discloses the technical scheme who adopts is: a dual level control switch comprising: the switch comprises an air cylinder and a switch body, wherein the switch body comprises a first atmosphere cavity, an air pressure action cavity and a second atmosphere cavity, the first atmosphere cavity and the second atmosphere cavity are communicated with the outside air, the air pressure action cavity is communicated with the air cylinder through a pipeline, an elastic diaphragm is arranged between the first atmosphere cavity and the air pressure action cavity, a trigger rod is arranged in the first atmosphere cavity, one end of the trigger rod is connected with the elastic diaphragm, the other end of the trigger rod is connected with a reset spring, the trigger rod is connected with a reed, a fixed end of the reed is connected with a first wiring terminal, the swing end of the reed is located between the second wiring terminal and a third wiring terminal in the first atmosphere cavity, the trigger rod is used for driving the reed to swing, and the second atmosphere cavity has the same structure as the first atmosphere cavity.

The improved structure is characterized in that one end of the reset spring is connected with the trigger rod, and the other end of the reset spring is connected with an adjusting knob.

The further improvement is that the first atmosphere cavity is connected with the second atmosphere cavity through a communicating pipe, and an atmosphere interface is arranged on the communicating pipe.

The improved structure is characterized in that a membrane supporting plate is arranged at the end part of the trigger rod connected with the elastic membrane, and the membrane supporting plate is abutted on the elastic membrane.

The reed is further improved to comprise a reed body, a connecting rod is arranged on the reed body, one end of the connecting rod is connected with the fixed end of the reed, the other end of the connecting rod is connected to the trigger rod in a sleeved mode, and a spring is arranged between the end portion, connected with the trigger rod, of the connecting rod and the swing end of the reed.

The utility model has the advantages that:

the utility model provides a two liquid level control switch, through fixed inflator in stock solution space, along with the liquid level change, the gas in the inflator is sent into the switch body, acts on the change of intracavity atmospheric pressure through atmospheric pressure, and then makes the reed swing to realized high, low liquid level signal collection, not only liquid level information gathers the accuracy, does not receive the influence of filth in the stock solution space, need not to insert the circuit in the stock solution space moreover, thereby avoided circuit fault, reduced the maintenance degree of difficulty and cost.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic structural view of a dual-level control switch of the present invention;

fig. 2 is a schematic view of the external structure of the switch body of the present invention;

fig. 3 is a cross-sectional view of the switch body of the present invention;

fig. 4 is a schematic structural diagram of the switch body of the present invention;

fig. 5 is a schematic view of the internal structure of the switch body of the present invention;

fig. 6 is a schematic diagram of the structure of the reed of the present invention.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, detachable connections, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the utility model can be understood according to specific situations by those skilled in the art.

As shown in fig. 1, the utility model provides a pair of two liquid level control switch, include: an air cylinder 1 and a switch body 2, wherein the two ends of the air cylinder 1 are open and arranged in a liquid storage space, in the embodiment, the air cylinder 1 is arranged in a sewage collecting well 100, the lower end of the air cylinder 1 is immersed in sewage, and the position of the air cylinder 1 in the sewage collecting well is fixed, as shown in fig. 4, the switch body 2 comprises a first atmosphere cavity 21, an air pressure acting cavity 22 and a second atmosphere cavity 23, the air pressure acting cavity 22 is positioned between the first atmosphere cavity 21 and the second atmosphere cavity 23, the first atmosphere cavity 21 and the second atmosphere cavity 23 are both communicated with outside air, the air pressure acting cavity 22 is communicated with the air cylinder 1 through a pipeline 221, as shown in fig. 3 and 5, an elastic diaphragm 211 is arranged between the first atmosphere cavity 21 and the air pressure acting cavity 22, and the elastic diaphragm 211 correspondingly bulges or is sunken towards the first atmosphere cavity 21 side or towards the air pressure acting cavity 22 side along with the air filling or pumping away from the air pressure acting cavity 22, a trigger rod 212 is arranged in the first atmosphere cavity 21, one end of the trigger rod 212 is connected with the elastic diaphragm 211, the other end of the trigger rod 212 is connected with a return spring 213, the trigger rod 212 can move towards the direction close to or away from the air pressure action cavity 22 along with the expansion or depression of the elastic diaphragm 211, the trigger rod 212 is connected with a reed 214, the fixed end of the reed 214 is connected with a first connecting terminal 215, the first connecting terminal 215 is fixed on the first atmosphere cavity 21 and partially extends out of the first atmosphere cavity 21 to be connected with a corresponding line, meanwhile, a second connecting terminal 216 and a third connecting terminal 217 are also fixed in the first atmosphere cavity 21, the second connecting terminal 216 and the third connecting terminal 217 also partially extend out of the first atmosphere cavity 21 to be connected with the corresponding line, and the swinging end of the reed 214 is positioned between the second connecting terminal 216 and the third connecting terminal 217 in the first atmosphere cavity 21, and the trigger rod 212 is used for driving the spring 214 to swing, and along with the swing end of the spring 214 driven by the elastic diaphragm 211, the spring contacts with the second connection terminal 216 or the third connection terminal 217, and the second atmosphere cavity 23 has the same structure as the first atmosphere cavity 21. Thus, at the beginning of the assembly of the switch body, by setting the two trigger rods 212 in the first atmosphere cavity 21 and the second atmosphere cavity 23 with different degrees of compression on the elastic diaphragm 211, the reeds 214 in the two cavities can be triggered respectively when two different liquid levels are realized. The elastic membrane 211 may be made of rubber or plastic material with elasticity, corrosion resistance, and impermeability. Commonly used materials are neoprene, nitrile rubber, polytetrafluoroethylene (F4), polyperfluoroethylene (F46), and the like.

The specific application is as follows: two trigger pressures are set in the two cavities respectively, the trigger pressure of one set of trigger mechanism is adjusted to be the pressure of low liquid level, and the trigger pressure of the other set of trigger mechanism is adjusted to be the pressure of high liquid level. When the pressure reaches the trigger pressure of the low liquid level, the trigger reed set by the low liquid level acts, the public end set by the low liquid level is disconnected with the normally closed contact (the second connecting terminal 216 or the third connecting terminal 217), and the public end set by the low liquid level is communicated with the normally open contact (the third connecting terminal 217 or the second connecting terminal 216); when the pressure reaches the trigger pressure of the high liquid level, the trigger reed set by the high liquid level acts, the public end set by the high liquid level is disconnected with the normally closed contact, and the public end set by the high liquid level is communicated with the normally open contact; when the pressure drops below the set value, the reed is reset to the initial state under the action of the reed reset spring. And the first connecting terminal 215, the second connecting terminal 216 and the third connecting terminal 217 are connected with corresponding valves, so that the liquid level control of the sewage collecting well is realized.

As shown in fig. 2, the further improvement is that a housing 200 is covered outside the first atmosphere chamber 21 and the second atmosphere chamber 23, and is used for protecting the connecting terminal extending to the outside of the chamber, so that liquid can not enter the space in the housing, and meanwhile, the conducting wire connected to the connecting terminal is transmitted to the corresponding position through the protective pipe.

This double-liquid-level control switch, through fixed inflator in stock solution space, along with the liquid level change, the gas in the inflator is sent into the switch body, acts on the change of intracavity atmospheric pressure through atmospheric pressure, and then makes the reed swing to realized high, low liquid level signal acquisition, not only liquid level information gathers the accuracy, does not receive the influence of filth in the stock solution space, need not to insert the circuit in the stock solution space moreover, thereby avoided circuit fault, the reduction is maintained the degree of difficulty and is costed.

In a further modification, one end of the return spring 213 is connected to the trigger rod 212, and the other end is connected to an adjusting knob 218. The precompression amount of the reset spring is adjusted through the adjusting knob, the trigger pressure can be adjusted, and then the adjustment of different liquid level trigger pressures is realized.

In a further refinement, adjustment knob 218 is shown with a scale.

In a further improvement, the first atmosphere cavity 21 and the second atmosphere cavity 23 are connected through a communicating pipe 24, and an atmosphere interface 241 is arranged on the communicating pipe 24.

In a further improvement, a diaphragm support plate 219 is arranged at the end of the trigger rod 212 connected to the elastic diaphragm 211, and the diaphragm support plate 219 abuts against the elastic diaphragm 211. The uniform deformation of the elastic diaphragm is achieved by the diaphragm support plate 219, and the force direction of the trigger lever 212 is made perpendicular to the elastic diaphragm.

As shown in fig. 6, a further improvement is that the reed 214 includes a reed body 2141, a connecting rod 2142 is disposed on the reed body 2141, one end of the connecting rod 2142 is connected to the fixed end of the reed, the other end is sleeved on the trigger rod 212, and meanwhile, the trigger rod 212 is provided with an annular groove for accommodating and limiting the end of the connecting rod 2142, specifically, the reed body 2141 and the connecting rod 2142 can be integrally formed, and a spring 2143 is disposed between the end of the connecting rod 2142 connected to the trigger rod 212 and the reed swinging end. The reed of this kind of design can realize triggering in the twinkling of an eye, and when reaching preset pressure value, the reed just has the action, and contact is put through or break off in the twinkling of an eye, avoids contact unstable.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A dual level control switch, comprising: the switch comprises an air cylinder and a switch body, wherein the switch body comprises a first atmosphere cavity, an air pressure action cavity and a second atmosphere cavity, the first atmosphere cavity and the second atmosphere cavity are communicated with the outside air, the air pressure action cavity is communicated with the air cylinder through a pipeline, an elastic diaphragm is arranged between the first atmosphere cavity and the air pressure action cavity, a trigger rod is arranged in the first atmosphere cavity, one end of the trigger rod is connected with the elastic diaphragm, the other end of the trigger rod is connected with a reset spring, the trigger rod is connected with a reed, a fixed end of the reed is connected with a first wiring terminal, the swing end of the reed is located between the second wiring terminal and a third wiring terminal in the first atmosphere cavity, the trigger rod is used for driving the reed to swing, and the second atmosphere cavity has the same structure as the first atmosphere cavity.

2. The dual level control switch of claim 1, wherein said return spring has one end connected to said trigger lever and the other end connected to an adjustment knob.

3. The dual liquid level control switch according to claim 1, wherein the first atmosphere chamber and the second atmosphere chamber are connected by a communicating pipe, and an atmosphere interface is provided on the communicating pipe.

4. The dual level control switch of claim 1, wherein a diaphragm support plate is disposed at an end of the trigger rod connected to the elastic diaphragm, and the diaphragm support plate abuts against the elastic diaphragm.

5. The dual liquid level control switch according to claim 1, wherein the reed comprises a reed body, a connecting rod is disposed on the reed body, one end of the connecting rod is connected to the fixed end of the reed, the other end of the connecting rod is sleeved on the trigger rod, and a spring is disposed between the end of the connecting rod connected to the trigger rod and the swing end of the reed.