CN212392179U

CN212392179U - Adjustable pressure switch

Info

Publication number: CN212392179U
Application number: CN202021687038.8U
Authority: CN
Inventors: 肖春林
Original assignee: Changzhou Turin Controller Co ltd
Current assignee: Changzhou Turin Controller Co ltd
Priority date: 2020-08-14
Filing date: 2020-08-14
Publication date: 2021-01-22
Anticipated expiration: 2030-08-14

Abstract

The utility model relates to an adjustable pressure switch, which comprises a binding post shell, a disconnecting device for disconnecting a movable contact from a static contact and a pressure adjusting device for adjusting disconnecting pressure, wherein the movable contact is arranged on a spring plate, and the upper end of the binding post shell is provided with a mounting groove; pressure adjustment device is including installing the drive plate in the mounting groove in proper order, adjusting spring, adjust the seat, adjusting screw and fixing base, drive plate installs in the tank bottom of mounting groove, lower extreme integrated into one piece has the ejector pin of wearing out the tank bottom downwards, the ejector pin supports and leans on in the push rod, adjusting spring's upper and lower end supports respectively and leans on in adjusting the seat, drive plate, adjust the seat suit in the mounting groove, with adjusting screw threaded connection, adjusting screw axial positioning installs on the fixing base, fixing base fixed mounting is in the notch department of mounting groove. The utility model discloses the rotatory adjusting screw of accessible to adjustment adjusting spring's elasticity, thereby the change makes the disconnection pressure of moving, stationary contact disconnection.

Description

Adjustable pressure switch

Technical Field

The utility model relates to an adjustable pressure switch.

Background

The pressure switch adopts a pressure sensor and a transmitting circuit with high precision and high stability, and then realizes the detection, display, alarm and control signal output of medium pressure signals through a special CPU modular signal processing technology. The pressure switch can be widely used for measuring and controlling the gauge pressure and absolute pressure of various gases and liquids in the fields of petroleum, chemical industry, metallurgy, electric power, water supply and the like, is an ideal intelligent measuring and controlling instrument for industrial fields, and is also widely used in the fields of aerospace and military industry.

When the pressure of the existing pressure switch reaches a fixed value, the movable contact and the static contact are disconnected, and the disconnection pressure value of the existing pressure switch is a fixed value. When the pressure switch is installed on a unit, because the working conditions of each unit are inconsistent and the disconnection pressure value is fixed, the design requirement is difficult to meet, the fault is easy to jump, the pressure in the unit can also be changed due to seasonal temperature change every year, and the disconnection pressure value is fixed, so that the pressure switch with other disconnection pressure values needs to be replaced, and the resource waste is caused.

SUMMERY OF THE UTILITY MODEL

The utility model provides an adjustable disconnection pressure and convenient operation's pressure switch.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: the adjustable pressure switch comprises a binding post shell, two binding posts, a disconnecting device and a pressure adjusting device, wherein a movable contact and a fixed contact are respectively and fixedly arranged on the binding posts;

the disconnecting device comprises a film cover fixedly arranged below the binding post shell, an elastic diaphragm clamped in the film cover and a push rod arranged above the elastic diaphragm, and the push rod is abutted against the lower end of the reed;

pressure adjustment device is including installing the drive disk assembly in the mounting groove in proper order, adjusting spring, adjust the seat, adjusting screw and fixing base, drive disk assembly installs in the tank bottom of mounting groove, lower extreme integrated into one piece has the ejector pin of wearing out the tank bottom downwards, the ejector pin supports and leans on in the push rod, adjusting spring's lower extreme supports and leans on in drive disk assembly, the upper end supports and leans on in adjusting the seat, adjust the seat suit in the mounting groove, the coaxial internal thread that is provided with in middle part, adjusting screw's lower extreme is provided with the external screw thread that is connected with the internal thread, adjusting screw axial positioning installs on the fixing base.

Wherein, the upper end of the push rod is provided with a push rod groove for accommodating the push rod.

The upper end of the adjusting screw rod extends out of the fixed seat, the upper surface of the adjusting screw rod is provided with an operating groove, and the operating groove is a cross groove, a straight groove or an inner hexagonal groove.

Wherein, adjusting screw fixed mounting has the locating piece, and the lower extreme of locating piece supports and leans on in the upper end of fixing base.

Wherein, the outer cover of the binding post shell is provided with a protective outer cover, and the middle part of the protective outer cover is provided with an operation hole which exposes the operation groove.

Wherein, the dust cover for sealing the operation hole is fixedly arranged on the operation hole.

Wherein, the upper end of transmission bottom plate and the lower extreme of adjusting the seat are provided with the first reference column and the second reference column that are used for location installation regulating spring respectively.

The membrane cover comprises an upper membrane cover fixedly installed at the lower end of the binding post shell and a lower membrane cover installed below the upper membrane cover, and the edge of the elastic membrane is clamped between the upper membrane cover and the lower membrane cover.

Wherein, the upper membrane cover extends inwards to form a positioning ring.

Wherein, the top of membrane lid is provided with the direction lid through the retainer plate is coaxial, and the push rod suit is in the direction lid.

Compared with the prior art, the utility model discloses following beneficial effect has: the utility model discloses the rotatory adjusting screw of accessible to adjustment adjusting spring's elasticity, thereby the change makes the break pressure of moving, stationary contact disconnection, during the regulation, only need rotatory adjusting screw can, it is convenient to adjust, with the change that adapts to different operating modes or seasons.

Drawings

Fig. 1 is the schematic diagram of the transverse section structure of the adjustable pressure switch of the present invention.

Fig. 2 is the schematic diagram of the three-dimensional structure of the reed connection terminal of the adjustable pressure switch of the present invention.

Fig. 3 is the utility model discloses overlook the structure sketch map after adjustable pressure switch gets rid of the dust cover.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments. In the following description, any concept relating to the directionality or orientation of up, down, left, right, front and rear is given with respect to the position shown in the figures being described, and thus should not be construed as particularly limiting the technical solution provided by the present invention.

As shown in fig. 1, the utility model discloses adjustable pressure switch includes terminal shell 1, two respectively fixed mounting have the terminal of movable contact 21 and stationary contact 22, make the breaker of movable contact 21 and stationary contact 22 disconnection, and be used for adjusting the pressure regulator of disconnection pressure, two terminal parallel mount are on terminal shell 1, stationary contact 22 fixed mounting is on one of them terminal, movable contact 21 installs on another terminal through reed 4, movable contact 21 sets up directly over stationary contact 22, during normal use, movable contact 21 supports and leans on in stationary contact 22, circuit closure promptly, be in normally closed state, break down when pressure system, when pressure risees, can force the diaphragm motion, upwards promote the push rod, thereby make movable contact and stationary contact break away from.

As shown in fig. 2, the spring plate 4 includes a fixing portion 41 riveted to the terminal 2 and a contact portion 42 fixedly mounted with the movable contact 21, two arc-shaped pieces 43 connecting the fixing portion 41 and the contact portion 42, and a push rod portion 44 extending outward from the contact portion 42, the two arc-shaped pieces 43 are respectively disposed at two ends of the spring plate 4, one of the arc-shaped pieces 43 is bent upward, the other arc-shaped piece is bent downward, the push rod portion 44 is disposed in a gap between the two arc-shaped pieces 43, and the push rod abuts against the push rod portion 44.

The disconnecting device comprises a film cover 51 fixedly installed below the terminal housing 1, an elastic diaphragm 52 clamped in the film cover 2, a push rod 53 installed above the elastic diaphragm 52, and a joint 56 fixedly installed below the film cover 51, wherein the joint 56 is connected with a pressure system, the push rod 53 is abutted to the lower part of the push rod part 44, when the pressure in the pressure system exceeds the set disconnection pressure, the diaphragm is upwards deformed under the action of the pressure, the push rod is pushed to upwards move, so that a reed is driven to upwards move, and the movable contact and the static contact are forced to be separated.

The membrane cover 51 includes an upper membrane cover 511 fixedly mounted on the lower end of the terminal housing 1, and a lower membrane cover 512 mounted under the upper membrane cover 511, and the edge of the elastic membrane 52 is sandwiched between the upper membrane cover 511 and the lower membrane cover 512 to realize the fixed mounting of the membrane.

The upper membrane cover 511 is extended inward with a positioning ring 513 to limit the deformation degree of the membrane, and avoid the membrane from being deformed excessively to protect the membrane.

A guide cover 55 for guiding the push rod 53 is coaxially arranged above the membrane cover 51 through a fixing ring 54, and the push rod 53 is sleeved in the guide cover 55 to play a role in positioning the push rod and avoid the push rod from deviating.

Above-mentioned pressure adjustment device is including installing the transmission bottom plate 61 in mounting groove 11 in proper order, regulating spring 62, adjust seat 63, adjusting screw 64 and fixing base 65, transmission bottom plate 61 is installed in the tank bottom of mounting groove 11, lower extreme integrated into one piece has the ejector pin 611 of wearing out the tank bottom downwards, ejector pin 611 supports and leans on in push rod 53, the lower extreme of regulating spring 62 supports and leans on in transmission bottom plate 61, the upper end supports and leans on in adjusting seat 63, adjust seat 63 suit in mounting groove 11, the coaxial internal thread that is provided with in middle part, the lower extreme of adjusting screw 64 is provided with the external screw thread that is connected with the internal thread, interior, the external screw thread can be right-handed thread, also can be left-handed thread, adjusting screw 64 axial positioning installs on fixing base 65, fixing. When the pressure in the pressure system is higher than the elastic force of the adjusting spring, the push rod above the membrane is pushed by high pressure to overcome the elastic force of the adjusting spring to move upwards, so that the reed is driven to warp upwards, and the movable contact and the static contact are separated; when the pressure is regulated, only the regulating screw rod needs to be rotated, so that the regulating seat is driven to move upwards or downwards in the mounting groove, the regulating spring is compressed or extended, the elasticity of the regulating spring is changed, and the pressure for disconnecting the movable contact and the static contact is changed.

The upper end of the push rod 53 is provided with a push rod groove 531 for accommodating the push rod 611, so that the push rod is positioned and installed, the push rod is prevented from deviating, and the push rod is prevented from influencing the operation of the reed.

The upper end of the adjusting screw 64 extends out of the fixing base 65, the upper surface of the adjusting screw 64 is provided with an operating groove 641, and the operating groove 641 is a cross groove, a straight groove or an inner hexagonal groove, so that a user can operate the adjusting screw conveniently to rotate the adjusting screw to adjust the elasticity of the adjusting spring.

A positioning block 66 is fixedly mounted on the adjusting screw 64, which exceeds the fixing seat 65, and the lower end of the positioning block 66 abuts against the lower end of the fixing seat 65, so that the adjusting screw is positioned in the axial direction, namely, only rotates and does not move up and down.

A first positioning column 612 is integrally formed at the upper end of the transmission bottom plate 61, and the lower end of the adjusting spring 62 is sleeved on the first positioning column 612 and used for positioning and mounting the lower end of the adjusting spring to prevent the spring from inclining; the lower extreme integrated into one piece of adjusting seat 63 has second reference column 631, and the upper end suit of adjusting spring 62 is on second reference column 631 for the location installation of adjusting spring upper end avoids the spring to take place the slope.

Above-mentioned terminal shell 1 dustcoat is equipped with protecting dustcoat 3, and this protecting dustcoat 3 fixed mounting plays dustproof effect on direction lid 55, leaves the space between its inner wall and the terminal shell 1 outer wall, and the power cord of the terminal department of being convenient for is connected.

The upper end of the protective outer cover 3 is provided with an operation hole 31 for exposing an operation groove at the upper end of the adjusting screw rod, so that a user can operate the protective outer cover conveniently, the upper cover of the operation hole 3 is covered with the dustproof cover 7, and when the adjusting screw rod is not operated, the operation hole is sealed, and the dustproof effect is achieved.

As shown in fig. 3, the upper surface of the protective housing 3 is provided with a mark line 8, the mark line 8 may be a circular arc line or a straight line, two ends of the mark line are respectively provided with an arrow, and a mark on an attachment of the arrow is a "+" or "-" sign to indicate that the adjusting screw is rotated in the next direction, so that the breaking pressure can be increased or decreased.

Finally, it should be noted that: the above embodiments are merely illustrative of the technical solutions of the present invention, and not limitative thereof; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. An adjustable pressure switch, characterized in that: the pressure switch comprises a terminal shell (1), two terminals (2) which are respectively fixedly provided with a movable contact (21) and a fixed contact (22), a disconnecting device which enables the movable contact (21) to be disconnected with the fixed contact (22), and a pressure adjusting device for adjusting disconnecting pressure, wherein the two terminals (2) are arranged on the terminal shell (1) in parallel, the fixed contact (22) is fixedly arranged on one of the terminals (2), the movable contact (21) is arranged on the other terminal (2) through a reed (4), and the upper end of the terminal shell (1) is provided with an installation groove (11);

the disconnecting device comprises a membrane cover (51) fixedly installed below the terminal housing (1), an elastic membrane (52) clamped in the membrane cover (51), and a push rod (53) installed above the elastic membrane (52), wherein the push rod (53) abuts against the lower end of the reed (4);

the pressure adjusting device comprises a transmission bottom plate (61), an adjusting spring (62), an adjusting seat (63), an adjusting screw rod (64) and a fixed seat (65) which are sequentially arranged in the mounting groove (11), the transmission bottom plate (61) is arranged at the bottom of the mounting groove (11), a top rod (611) which penetrates out of the bottom of the groove downwards is integrally formed at the lower end of the transmission bottom plate, the push rod (611) abuts against the push rod (53), the lower end of the adjusting spring (62) abuts against the transmission bottom plate (61), and the upper end abuts against the adjusting seat (63), the adjusting seat (63) is sleeved in the mounting groove (11), the middle part is coaxially provided with an internal thread, the lower end of the adjusting screw rod (64) is provided with an external thread connected with the internal thread, the adjusting screw rod (64) is axially positioned and arranged on the fixed seat (65), the fixed seat (65) is fixedly arranged at the notch of the mounting groove (11).

2. The adjustable pressure switch according to claim 1, wherein the upper end of the push rod (53) is provided with a push rod groove (531) for accommodating the push rod (611).

3. The adjustable pressure switch according to claim 1, wherein the upper end of the adjusting screw rod (64) extends out of the fixed seat (65), an operating groove (641) is formed in the upper surface of the adjusting screw rod (64), and the operating groove (641) is a cross groove, a straight groove or an inner hexagonal groove.

4. The adjustable pressure switch according to claim 3, wherein a positioning block (66) is fixedly mounted on the adjusting screw rod (64), and the lower end of the positioning block (66) abuts against the upper end of the fixing seat (65).

5. The adjustable pressure switch according to claim 3, wherein a protective cover (3) is arranged outside the terminal housing (1), and an operation hole (31) for exposing the operation groove (641) is formed in the middle of the protective cover (3).

6. The adjustable pressure switch according to claim 5, wherein a dust cover (7) for closing the operation hole (31) is fixedly installed on the operation hole (31).

7. The adjustable pressure switch according to claim 1, wherein the upper end of the transmission bottom plate (61) and the lower end of the adjusting seat (63) are respectively provided with a first positioning column (612) and a second positioning column (631) for positioning and installing the adjusting spring (62).

8. The adjustable pressure switch according to claim 1, wherein the membrane cover (51) comprises an upper membrane cover (511) fixedly mounted on the lower end of the terminal housing (1) and a lower membrane cover (512) mounted below the upper membrane cover (511), and the edge of the elastic membrane (52) is clamped between the upper membrane cover (511) and the lower membrane cover (512).

9. The adjustable pressure switch of claim 8, wherein the upper membrane cover (511) has a retaining ring (513) extending inwardly.

10. The adjustable pressure switch according to claim 8, wherein a guide cover (55) is coaxially arranged above the membrane cover (51) through a fixing ring (54), and the push rod (53) is sleeved in the guide cover (55).