CN215869126U

CN215869126U - High-precision pressure switch

Info

Publication number: CN215869126U
Application number: CN202121534013.9U
Authority: CN
Inventors: 王磊
Original assignee: Saift Hydraulic Technology Shenyang Co ltd
Current assignee: Saift Hydraulic Technology Shenyang Co ltd
Priority date: 2021-07-07
Filing date: 2021-07-07
Publication date: 2022-02-18
Anticipated expiration: 2031-07-07

Abstract

The utility model discloses a high-precision pressure switch, which comprises an upper shell and a lower shell, wherein a pair of wiring ends are arranged in the upper shell, a pair of stationary contacts are arranged at the lower ends of the pair of wiring ends, a pressure joint is arranged below the lower shell, the upper shell is detachably connected with the lower shell, a pressure cavity is arranged in the lower shell and positioned above the pressure joint, and a return diaphragm is arranged in the pressure cavity. The maintenance and the protection at the later stage are convenient, and the use of people is convenient.

Description

High-precision pressure switch

Technical Field

The utility model relates to the technical field of pressure switches, in particular to a high-precision pressure switch.

Background

The pressure switch is a simple pressure control device, and can give out an alarm or a control signal when the measured pressure reaches a rated value, and the pressure switch is a common control element in life.

Chinese patent CN210925868U discloses a novel pressure switch, which comprises a connecting plate frame, a front pressure switch assembly and a rear pressure switch assembly, wherein the front pressure switch assembly and the rear pressure switch assembly comprise a temperature-resistant insulating block, a movable contact assembly, an insulating base body, an adjusting screw, a first connecting terminal, a second connecting terminal, a static contact, a pressure plate and an insulating column;

this pressure switch accessible stationary contact realizes on-off control with the cooperation of movable contact, however because the influence of factors such as ambient temperature, the contact exposes for a long time and can lead to surface oxidation corrosion to pressure switch's precision has been reduced, and it is inconvenient to use.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides a high-precision pressure switch, which solves the problems of short service life and poor precision of the conventional device.

In order to achieve the purpose, the utility model is realized by the following technical scheme: the utility model provides a high accuracy pressure switch, includes casing and lower casing, be equipped with a pair of wiring end in the upper casing, it is a pair of wiring end lower extreme is equipped with a pair of stationary contact, casing below is equipped with pressure joint down, go up the casing with can dismantle the connection between the casing down, the internal just being located of inferior valve pressure joint top department is equipped with the pressure chamber, be equipped with the return diaphragm in the pressure chamber, return diaphragm upper end is equipped with the ejector pin, a pair of connecting plate is installed to the ejector pin lateral wall, and is a pair of be equipped with a pair of movable contact on the connecting plate, wiring end below just is located the stationary contact outside is equipped with the spacer, the connecting plate top just is located the movable contact outside is equipped with down the spacer, be equipped with the sliding chamber in the spacer down, it inserts to go up the spacer in the sliding chamber, be equipped with reset assembly in the upper casing.

Preferably, the reset assembly comprises a sleeve arranged in the upper shell, a telescopic rod is fixedly arranged in the sleeve, the upper end of the ejector rod is inserted into the sleeve and is fixedly connected with the lower end of the telescopic rod, and a reset spring is sleeved outside the telescopic rod.

Preferably, a first connecting ring is arranged on the outer side of the lower end of the upper shell, a second connecting ring is arranged on the outer side of the upper end of the lower shell, and the first connecting ring and the second connecting ring are fixedly connected through a plurality of bolts.

Preferably, the lower end of the upper shell is provided with an annular groove, and a sealing ring is arranged in the annular groove.

Preferably, the inner diameter of the sleeve is larger than the diameter of the ejector rod.

Preferably, the pressure joint is integrally formed with the lower housing.

Preferably, the upper spacer bush and the lower spacer bush are made of insulating materials.

Advantageous effects

The utility model provides a high-precision pressure switch which has the following beneficial effects that the device is compact in structure, contacts can be effectively protected from being influenced by external factors by arranging an upper spacer bush and a lower spacer bush, the service life and the control precision are improved, a telescopic rod is matched with a return spring and matched with a return diaphragm to push a push rod to reset, the failure of the return diaphragm is effectively avoided, the phenomenon that the push rod does not reset is avoided, the integral precision of the device is further improved, the upper shell and the lower shell are detachably connected, the later maintenance and protection are facilitated, and convenience is brought to people in use.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

In the figure: 1. an upper housing; 2. a lower housing; 3. a terminal; 4. a stationary contact; 5. a pressure joint; 6. a pressure chamber; 7. returning the membrane; 8. a top rod; 9. a connecting plate; 10. a movable contact; 11. arranging a spacer bush; 12. a lower spacer bush; 13. a sliding cavity; 14. a sleeve; 15. a telescopic rod; 16. a return spring; 17. a first connecting ring; 18. a second connection ring; 19. a bolt; 20. and (5) sealing rings.

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 embodiments are only a part of the embodiments of the present invention, and not all of the 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, the present invention provides a technical solution: a high-precision pressure switch comprises an upper shell 1 and a lower shell 2, wherein a pair of wiring ends 3 are arranged in the upper shell 1, a pair of stationary contacts 4 are arranged at the lower ends of the pair of wiring ends 3, a pressure joint 5 is arranged below the lower shell 2, the upper shell 1 is detachably connected with the lower shell 2, a pressure cavity 6 is arranged in the lower shell 2 and above the pressure joint 5, a return diaphragm 7 is arranged in the pressure cavity 6, an ejector rod 8 is arranged at the upper end of the return diaphragm 7, a pair of connecting plates 9 are arranged on the side walls of the ejector rod 8, a pair of movable contacts 10 are arranged on the pair of connecting plates 9, an upper spacer 11 is arranged below the wiring ends 3 and outside the stationary contacts 4, a lower spacer 12 is arranged above the connecting plates 9 and outside the movable contacts 10, a sliding cavity 13 is arranged in the lower spacer 12, and the upper spacer 11 is inserted into the sliding cavity 13, a reset assembly is arranged in the upper shell 1; the reset assembly comprises a sleeve 14 arranged in the upper shell 1, a telescopic rod 15 is fixedly arranged in the sleeve 14, the upper end of the ejector rod 8 is inserted into the sleeve 14 and is fixedly connected with the lower end of the telescopic rod 15, and a reset spring 16 is sleeved outside the telescopic rod 15; a first connecting ring 17 is arranged on the outer side of the lower end of the upper shell 1, a second connecting ring 18 is arranged on the outer side of the upper end of the lower shell 2, and the first connecting ring 17 and the second connecting ring 18 are fixedly connected through a plurality of bolts 19; an annular groove is formed in the lower end of the upper shell 1, and a sealing ring 20 is arranged in the annular groove; the inner diameter of the sleeve 14 is larger than the diameter of the ejector rod 8; the pressure joint 5 and the lower shell 2 are integrally formed; the upper spacer bush 11 and the lower spacer bush 12 are made of insulating materials.

The following working principles, detailed connecting means thereof, and the following main descriptions of the working principles and processes thereof are well known in the art, and will be referred to by those skilled in the art for the specific connection and operation sequence of the components in the present disclosure.

Example (b): when the switch is used, a high-pressure medium is injected into the pressure joint 5, the return membrane 7 drives the ejector rod 8 to ascend and jack up, the telescopic rod 15 and the return spring 16 are contracted, the connecting plate 9 drives the movable contact 10 to move along with the movable contact, the movable contact 10 is in contact with the fixed contact 4, the circuit is connected, the switch is opened, the upper spacer 11 is inserted into the sliding cavity 13 of the lower spacer 12 at the moment, when the switch needs to be closed, the high-pressure medium flows out, the return spring 16 and the telescopic rod 15 push the ejector rod 8 to descend, the return membrane 7 is reset at the same time, the movable contact 10 is separated from the fixed contact 4, the circuit is disconnected, and closing of the switch is achieved.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The use of the phrase "comprising one of the elements does not exclude the presence of other like elements in the process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A high-precision pressure switch comprises an upper shell (1) and a lower shell (2), wherein a pair of wiring ends (3) are arranged in the upper shell (1), a pair of stationary contacts (4) are arranged at the lower ends of the wiring ends (3), a pressure joint (5) is arranged below the lower shell (2), the high-precision pressure switch is characterized in that the upper shell (1) is detachably connected with the lower shell (2), a pressure cavity (6) is arranged in the lower shell (2) and above the pressure joint (5), a return diaphragm (7) is arranged in the pressure cavity (6), an ejector rod (8) is arranged at the upper end of the return diaphragm (7), a pair of connecting plates (9) are arranged on the side wall of the ejector rod (8), a pair of movable contacts (10) are arranged on the pair of connecting plates (9), an upper spacer sleeve (11) is arranged below the wiring ends (3) and outside the stationary contacts (4), a lower spacer bush (12) is arranged above the connecting plate (9) and on the outer side of the movable contact (10), a sliding cavity (13) is arranged in the lower spacer bush (12), the upper spacer bush (11) is inserted into the sliding cavity (13), and a reset assembly is arranged in the upper shell (1).

2. A high-precision pressure switch according to claim 1, characterized in that the reset component comprises a sleeve (14) arranged in the upper shell (1), a telescopic rod (15) is fixedly arranged in the sleeve (14), the upper end of the ejector rod (8) is inserted into the sleeve (14) and is fixedly connected with the lower end of the telescopic rod (15), and a reset spring (16) is sleeved outside the telescopic rod (15).

3. A high precision pressure switch according to claim 2, characterized in that the upper housing (1) is provided with a first connecting ring (17) at the outer side of the lower end, the lower housing (2) is provided with a second connecting ring (18) at the outer side of the upper end, and the first connecting ring (17) and the second connecting ring (18) are fixedly connected through a plurality of bolts (19).

4. A high accuracy pressure switch according to claim 3, characterized in that the lower end of the upper housing (1) is provided with an annular groove, in which a sealing ring (20) is arranged.

5. A high accuracy pressure switch according to claim 3, characterized in that the inner diameter of the sleeve (14) is larger than the diameter of the plunger (8).

6. A high precision pressure switch according to claim 3, characterized in that the pressure connector (5) is formed integrally with the lower housing (2).

7. A high accuracy pressure switch according to claim 2, characterized in that the upper spacer (11) and the lower spacer (12) are made of insulating material.