CN215595758U

CN215595758U - Vacuum degree alarm

Info

Publication number: CN215595758U
Application number: CN202021789072.6U
Authority: CN
Inventors: 张雪磊; 石铭文
Original assignee: Wuhu Liannuo Electrical Appliances Co ltd
Current assignee: Wuhu Liannuo Electrical Appliances Co ltd
Priority date: 2020-08-25
Filing date: 2020-08-25
Publication date: 2022-01-21
Anticipated expiration: 2030-08-25

Abstract

The utility model discloses a vacuum degree alarm which comprises a plastic piece, a micro switch, a pressure adjusting screw and a rubber diaphragm, wherein a waterproof breathable film is arranged at the upper end inside the plastic piece, the micro switch is arranged inside the plastic piece close to the waterproof breathable film, a pressing plate is arranged at the bottom of the outer side of the micro switch, a contact lining plate is arranged at the bottom of the micro switch on the inner side of the pressing plate, the bottom of the pressing plate is hermetically connected with the inner wall of the plastic piece through the rubber diaphragm, a pressure adjusting spring is arranged inside the plastic piece close to the bottom of the pressing plate, a spring bushing is arranged at the bottom of the pressure adjusting spring, a bulge in the middle of the spring bushing extends into the pressure adjusting spring, and the pressure adjusting screw is arranged at the bottom of the spring bushing. In order to avoid the quality hidden trouble of the mechanical contact type long-term work, the utility model adopts the micro switch to replace the mechanical contact type long-term work, the structural design is simpler and more reasonable, and the service life of the product is prolonged.

Description

Vacuum degree alarm

Technical Field

The utility model relates to the technical field of alarms, in particular to a vacuum degree alarm.

Background

The air filter is mainly applied to the fields of pneumatic machinery, internal combustion machinery and the like, and is used for providing clean air for the mechanical equipment so as to prevent the mechanical equipment from sucking air with foreign particles in work and increasing the probability of abrasion and damage. Before entering the cylinder, the air must be finely filtered by an air filter before entering the cylinder. Present automobile air cleaner when taking place to block up, can make the engine not enough that admits air, make the fuel burning incomplete, lead to engine work unstable, power descends, the phenomenon of oil consumption increase takes place, in addition can cause the engine to inhale the air that has the micronic dust granule in a large number at work, this life-span that not only makes the machine oil filter core shortens greatly, still can lead to the inside abrasion aggravation of engine, and increase the probability of damage, present air cleaner takes place to block up and does not have suggestion device, only can discover and change at the bad falling of filter, this has brought extra expense for the user, the running cost has been increased.

The vacuum degree alarm is installed on an air filter, when the air filter is blocked, and negative pressure in an air inlet pipe of an engine reaches alarm pressure, a buzzer of the alarm continuously buzzes to remind that the filter breaks down so as to be cleaned or maintained in time, so that the situation that the filter is known to be broken and the alarm gives an alarm is avoided, the alarm is mostly composed of a silicon rubber diaphragm, a spring, a contact, a connecting rod and a shell at present, and the technology is early lagged behind. When in use, due to factors such as spring aging, contact oxidation, corrosion, poor contact, vibration and the like, the alarm accuracy is poor, and the reliability and the durability are not ideal. Due to the problem of working environment, the water and dust can be completely lost. In addition, when the silicon rubber diaphragm works, the silicon rubber diaphragm is repeatedly pumped at an alarm point, a large amount of water vapor is easily absorbed, so that the spring and the contact are wet, water stain and corrosion are formed, the contact is poor in contact, and the alarm fails. Therefore, we propose a vacuum alarm.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a vacuum degree alarm, which aims to solve the problems that the traditional vacuum degree alarm provided by the background technology has poor alarm accuracy and poor reliability and durability due to factors such as spring aging, contact oxidation and corrosion, poor contact, vibration and the like in use; due to the problem of working environment, the water and dust can be completely lost; in addition, when the silicon rubber diaphragm works, the silicon rubber diaphragm is repeatedly pumped at an alarm point, so that a large amount of water vapor is easily absorbed, the spring and the contact are wet, water stain and corrosion are formed, the contact is poor in contact, and the alarm fails.

In order to achieve the purpose, the utility model provides the following technical scheme:

a vacuum degree alarm comprises a plastic piece, a micro switch, a pressure adjusting screw and a rubber diaphragm, wherein the upper end inside the plastic piece is provided with a waterproof breathable film, the plastic piece is close to the waterproof breathable film, the inside of the plastic piece is provided with the micro switch, the bottom outside the micro switch is provided with a pressing plate, the bottom of the pressing plate is provided with a contact lining plate, the bottom of the pressing plate is hermetically connected with the inner wall of the plastic piece through the rubber diaphragm, the inside of the plastic piece, which is close to the bottom of the pressing plate, is provided with a pressure adjusting spring, the top of the pressure adjusting spring is sleeved and installed through a spring cap, the bottom of the pressure adjusting spring is provided with a spring bushing, a bulge in the middle of the spring bushing extends into the pressure adjusting spring, the bottom of the spring bushing is provided with the pressure adjusting screw, the outside of the pressure adjusting screw is provided with a metal shell, the metal shell extends upwards to be connected with the plastic part.

Preferably, a sealing cavity is formed in the plastic part corresponding to the microswitch, a waterproof breathable film is arranged in the sealing cavity, and the plastic part is installed by adopting an ultrasonic welding process by combining the material characteristics of the plastic part.

Preferably, the rubber diaphragm adopts a labyrinth seal structure, and the rubber diaphragm and the metal shell are installed by one-time compression joint through an upsetting process.

Preferably, an air inlet hole is formed in the metal shell close to the bottom of the pressure adjusting screw, threads are arranged on the inner wall of the air inlet hole, and a metal filter screen is arranged in the air inlet hole.

Preferably, the pressure adjusting screw drives the spring bushing to form an elastic telescopic structure by extruding the pressure adjusting spring.

The utility model has the beneficial effects that: 1. in order to avoid the quality hidden trouble caused by long-term work of a mechanical contact type, the microswitch is adopted for replacing the mechanical contact type, the structural design is simpler and more reasonable, and the service life of the product is prolonged; 2. the plastic part is provided with a microswitch sealing chamber, a waterproof and breathable structure is added, the internal and external pressure difference is balanced, the product precision is ensured, the waterproof property can meet the IP68 standard, the original artificial gum pasting process is abandoned by the mounting process, the material property of the plastic part is combined, and the ultrasonic welding process is adopted for mounting, so that the bonding strength and the breathability are ensured, and the mounting consistency is also ensured; 3. the inner rubber diaphragm adopts a labyrinth seal structure, is arranged with the metal shell and is pressed and connected by an upsetting process at one time, and the air tightness of the semi-finished product can be detected in a semi-finished product state, so that the integral tightness of the product is ensured, and the production cost is also reduced; 4. the metal filter screen is arranged at the thread of the air inlet end, so that air flow can be effectively dispersed, and the product alarm precision is improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of the structure at A in FIG. 1 according to the present invention.

Wherein: 1. a plastic part; 2. a microswitch; 3. pressing a plate; 4. a pressure regulating spring; 5. a spring bushing; 6. a pressure adjustment screw; 7. contacting the liner plate; 8. a rubber diaphragm; 9. a spring cap; 10. a metal housing; 11. a waterproof breathable film; 12. an air inlet; 13. a metal screen.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiment is only one embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a technical solution: a vacuum degree alarm comprises a plastic piece 1, a microswitch 2, a pressing plate 3, a pressure regulating spring 4, a spring bushing 5, a pressure regulating screw 6, a contact lining plate 7, a rubber diaphragm 8, a spring cap 9, a metal shell 10, a waterproof breathable film 11, an air inlet 12 and a metal filter screen 13, wherein the upper end inside the plastic piece 1 is provided with the waterproof breathable film 11, the upper end is close to the waterproof breathable film 11, the microswitch 2 is arranged inside the plastic piece 1, the pressing plate 3 is arranged at the bottom outside the microswitch 2, the bottom of the microswitch 2 is provided with the contact lining plate 7, the bottom of the pressing plate 3 is hermetically connected with the inner wall of the plastic piece 1 through the rubber diaphragm 8, the pressure regulating spring 4 is arranged inside the plastic piece 1 and close to the bottom of the pressing plate 3, and the top of the pressure regulating spring 4 is sleeved and installed through the spring cap 9, the bottom of pressure regulating spring 4 is provided with spring bushing 5, just the arch in the middle part of spring bushing 5 extends to inside pressure regulating spring 4, the bottom of spring bushing 5 is provided with pressure adjusting screw 6, the pressure adjusting screw 6 outside is provided with metal casing 10, metal casing 10 upwards extends and is connected for working of plastics 1.

A sealing cavity is formed in the plastic part 1 corresponding to the microswitch 2, a waterproof breathable film 11 is arranged in the sealing cavity, the plastic part 1 is installed by combining the material characteristics of the plastic part, a waterproof breathable structure is added, the internal and external pressure difference is balanced, the product precision is ensured, the waterproof characteristic can meet the IP68 standard, the original artificial gum pasting process is abandoned by the installation process, the plastic part is installed by combining the material characteristics of the plastic part and the ultrasonic welding process, the bonding strength and the breathability are ensured, and meanwhile, the installation consistency is also ensured; the rubber diaphragm 8 adopts a labyrinth seal structure, the rubber diaphragm 8 and the metal shell 10 are installed and pressed in a one-time mode through an upsetting process, and the air tightness of the semi-finished product can be detected in a semi-finished product state, so that the integral sealing performance of the product is ensured, and the production cost is reduced; an air inlet hole 12 is formed in the metal shell 10 close to the bottom of the pressure adjusting screw 6, threads are arranged on the inner wall of the air inlet hole 12, and a metal filter screen 13 is arranged in the air inlet hole 12, so that air flow can be effectively dispersed, and the product alarm precision is improved; the pressure adjusting screw 6 drives the spring bushing 5 to form an elastic telescopic structure by extruding the pressure adjusting spring 4.

The pressure adjusting spring 4 inside the alarm is compressed to drive the contact lining plate 7 to enable the contact of the microswitch 2, the alarm is in a normally open state, the microswitch 2 actually measures an operating force of 100 gf-150 gf, at the moment, the distance between the contact spring bushing 5 inside and the bottom of the metal shell 10 is more than or equal to 1.6mm theoretically, negative pressure gas enters the air chamber from a small hole in the middle of the air inlet hole 12, the rubber diaphragm 8 is sucked, the rubber diaphragm 8 deforms and moves downwards to drive the contact lining plate 7 to move downwards integrally, the pressure adjusting spring 4 is compressed, the contact lining plate 7 is separated from the microswitch 2, when the pressure reaches the alarm point set by the pressure adjusting spring 4, the pressure adjusting spring 4 restores the initial position, the contact lining plate 7 moves upwards integrally, the micro switch 2 is in contact connection, and the state switching is realized.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or structural features thereof may be made, and any changes, equivalents, improvements and the like made within the spirit and principle of the present invention are encompassed by the present invention.

Claims

1. The utility model provides a vacuum alarm, includes working of plastics (1), micro-gap switch (2), pressure adjusting screw (6) and rubber diaphragm (8), its characterized in that: the inner upper end of the plastic part (1) is provided with a waterproof breathable film (11), the plastic part (1) close to the waterproof breathable film (11) is internally provided with a microswitch (2), the outer bottom of the microswitch (2) is provided with a pressing plate (3), the bottom of the microswitch (2) is arranged on the inner side of the pressing plate (3) is provided with a contact lining plate (7), the bottom of the pressing plate (3) is hermetically connected with the inner wall of the plastic part (1) through a rubber diaphragm (8), the plastic part (1) close to the bottom of the pressing plate (3) is internally provided with a pressure adjusting spring (4), the top of the pressure adjusting spring (4) is sleeved and installed through a spring cap (9), the bottom of the pressure adjusting spring (4) is provided with a spring bushing (5), and the bulge in the middle of the spring bushing (5) extends to the inside of the pressure adjusting spring (4), the bottom of the spring bushing (5) is provided with a pressure adjusting screw (6), the outer side of the pressure adjusting screw (6) is provided with a metal shell (10), and the metal shell (10) extends upwards to be connected with the plastic part (1).

2. A vacuum level alarm as claimed in claim 1 wherein: a sealing cavity is formed in the plastic part (1) corresponding to the microswitch (2), a waterproof breathable film (11) is arranged in the sealing cavity, and the plastic part (1) is installed by adopting an ultrasonic welding process according to the material characteristics.

3. A vacuum level alarm as claimed in claim 1 wherein: the rubber diaphragm (8) adopts a labyrinth seal structure, and the rubber diaphragm (8) and the metal shell (10) are installed and pressed in one time by adopting an upsetting process.

4. A vacuum level alarm as claimed in claim 1 wherein: an air inlet hole (12) is formed in the metal shell (10) close to the bottom of the pressure adjusting screw (6), threads are arranged on the inner wall of the air inlet hole (12), and a metal filter screen (13) is arranged in the air inlet hole (12).

5. A vacuum level alarm as claimed in claim 1 wherein: the pressure adjusting screw (6) drives the spring bushing (5) to form an elastic telescopic structure by extruding the pressure adjusting spring (4).