CN220672466U - Combined mini pressure switch - Google Patents

Abstract

The utility model provides a combined mini pressure switch, which comprises a pressure switch and a manual switch, wherein the pressure switch comprises a shell, and an electric component is arranged in the shell and can be opened or closed in response to the working pressure of gas or fluid; one end of the shell is provided with a pressure inlet, the interior of the shell is divided into an upper cavity and a lower cavity by a disc-shaped partition piece, a sealing ring, an airtight film and an elastic sheet are sequentially arranged in the upper cavity, a driving pin is movably inserted in the center of the disc-shaped partition piece, the upper end of the driving pin stretches into the upper cavity to correspond to the center of the elastic sheet, and the lower end of the driving pin stretches into the lower cavity to correspond to the electric component, so that the opening and closing of the electric component can be realized; the manual switch is arranged on one side of the pressure switch and can control the opening and closing of the electric components. The combined mini pressure switch has exquisite structure, economy and practicability, and can be applied to liquid and gas control systems; the shell is composed of the joint, the main shell and the sealing sleeve, which is convenient for the arrangement of the disc-shaped partition piece and the processing and the assembly.

Description

A combined mini pressure switch

Technical field

The utility model belongs to the technical field related to pressure switches, and specifically relates to a combined mini pressure switch.

Background technique

In the process of industrial process control and technical measurement, mechanical pressure switches are increasingly used because of their high mechanical strength and ease of production due to their elastic sensitive components. The working process of the mechanical pressure switch is as follows: the elastic element of the pressure switch undergoes elastic deformation as the pressure changes, and the free end of the elastic element displaces, directly or indirectly pushing the switch element, changing the on-off state of the switch element, and achieving control. The purpose of measuring pressure. The company's existing pressure switch has a relatively complex structure and high cost, which makes the market price relatively high. Therefore, in order to increase market share and meet the customer's technical requirements, a mini pressure switch with a compact structure and high cost performance was developed. .

Contents of the invention

The utility model provides a combined mini pressure switch with compact structure and high cost performance.

The technical solution adopted by this utility model is:

A combined mini pressure switch includes a pressure switch and a manual switch. The pressure switch includes a housing. An electrical component is provided in the housing. The electrical component can be opened or closed in response to the working pressure of gas or fluid. ; One end of the casing has a pressure inlet, and the interior of the casing is divided into an upper chamber and a lower chamber by a disk-shaped partition. A sealing ring, an air-impermeable film and a shrapnel are arranged in the upper chamber in sequence. A driving pin is movablely inserted in the center of the disk-shaped partition. The upper end of the driving pin extends into the upper chamber and corresponds to the center of the elastic piece. The lower end of the driving pin extends into the lower chamber and corresponds to the electrical component, thereby enabling the disconnection of the electrical component. and closing; the manual switch is arranged on one side of the pressure switch and can control the opening and closing of the electrical components.

Preferably, the housing is extended to one side to form a box connected to the housing. A switch seat is provided on the box. The manual switch is a button, and the button is rotatably arranged on the switch seat. on the top, and the key lever extends into the switch seat; a transmission shaft is provided at the connection point between the housing and the box. One end of the transmission shaft is located in the box and fixed on the key lever, and the other end extends into the housing. It is installed in the body, and the transmission shaft is provided with a blade at one end inside the housing. The rotation of the transmission shaft drives the rotation of the blade to control the opening and closing of the electrical components.

Preferably, the transmission shaft is provided with a swing plate at one end of the box, and a fan-shaped groove is provided on one side of the box connected to the housing. The swing plate is embedded in the fan-shaped groove and can The swing plate moves back and forth in the fan-shaped groove with the transmission shaft as the center. The other side of the swing plate has a fixed rod at one end away from the transmission shaft. The fixed rod is movably arranged on the button swing rod. The swing rod moves back and forth to drive the swing plate to move back and forth. , so that the drive shaft can rotate back and forth circumferentially.

Preferably, the key lever is provided with a hollow rod along the length direction of the lever. The hollow rod is connected to a limiting ball through a spring, and the limiting ball extends out of the hollow rod. The switch seat is close to the hollow rod. An arc-shaped plate is provided on one side of the rod, and the limiting ball abuts against the arc-shaped plate.

Preferably, the switch base is a convex hollow body with a mounting plate, one end of the switch base with the mounting plate is a large-diameter end, and the end of the switch base away from the mounting plate is detachably arranged in the box.

Preferably, the electrical component includes a static contact blade and a moving contact blade, the inner ends of the static contact blade and the moving contact blade are fixed in the housing, and the static contact blade The movable contact insert extends outward from the housing to form two terminals. The inner end of the movable contact insert is connected with a current-carrying element, and the current-carrying element is in contact with the inner end of the static contact plug. The flow element can be forced to move away from the inner end of the stationary contact plug or back into contact with the inner end of the stationary contact plug.

Preferably, the housing includes a joint, a main housing, and a sealing sleeve. The joint has a pressure inlet and an open inner cavity connected to the pressure inlet. The electrical components are located in the main housing, and the disc-shaped partition The sealing sleeve is clamped between the joint and the main housing, and the sealing sleeve is provided outside the joint, the disk-shaped partition and the main housing.

Preferably, one end of the disc-shaped separator close to the joint extends into the inner cavity of the connector, and a groove is formed on one end of the disc-shaped separator close to the joint, the elastic piece is disposed in the groove, and the sealing ring The air-impermeable film is clamped between the inner side of the joint and the disk-shaped partition, and the disk-shaped partition is arranged with one end close to the main housing extending into the inner cavity of the main housing.

Compared with the existing technology, the beneficial effects of this utility model are: this combined mini pressure switch has a compact structure, is economical and practical, and can be used in liquid and gas control systems; the housing is composed of a joint, a main housing, and a sealing sleeve. , which not only facilitates the arrangement of disc-shaped partitions, but also facilitates processing and assembly; at the same time, it is integrated with a manual switch, which can be forcibly disconnected in case of unexpected situations to avoid major accidents.

Description of the drawings

Figure 1 is a front view of the utility model.

Figure 2 is a front view of Figure 1.

Figure 3 is a cross-sectional view along line A-A in Figure 2 .

Figure 4 is a cross-sectional view along line B-B in Figure 2 .

FIG. 5 is a bottom view of FIG. 1 .

Figure 6 is a C-C cross-sectional view in Figure 5 .

Figure 7 is a D-D cross-sectional view in Figure 5.

In the picture: 1. Shell; 2. Box; 3. Disc-shaped partition; 4. Sealing ring; 5. Airtight membrane; 6. Shrapnel; 7. Pressure inlet; 8. Driving pin; 9. Switch seat; 10. Button; 11. Drive shaft; 12. Blade; 13. Swing plate; 14. Sector groove; 15. Fixed rod; 16. Clamping arm; 17. Hollow rod; 18. Spring; 19. Limiting ball; 20. Arc plate; 21. Stationary contact insert; 22. Moving contact insert; 23. Current-carrying component; 24. Terminal block; 1-1, connector; 1-2, main housing; 1-3 , sealing sleeve; 3-1, groove; 9-1, mounting plate; 10-1, button rocker.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present utility model more clear, the utility model will be further described below in conjunction with specific implementation modes. The drawings are only for illustrative purposes and represent only schematic diagrams rather than actual drawings, which cannot be understood as limitations of this patent; for those skilled in the art, some well-known structures and their descriptions may be omitted in the drawings. Understandable.

The combined mini pressure switch of the present invention includes a pressure switch and a manual switch. The pressure switch includes a housing 1, and electrical components are provided in the housing 1. The electrical components can respond to the working pressure of gas or fluid. To realize opening or closing; one end of the housing 1 has a pressure inlet 7, which is connected to the pipeline to realize the entry of gas or fluid. The inside of the housing 1 is divided into an upper chamber by a disc-shaped partition 3 and a lower chamber. The upper chamber is provided with a sealing ring 4, an air-impermeable film 5 and a spring piece 6 in sequence from top to bottom. A driving pin 8 is movably inserted in the center of the disc-shaped partition 3, and the driving The upper end of the pin 8 extends into the upper chamber and corresponds to the center of the elastic piece, and its lower end extends into the lower chamber and corresponds to the electrical component. The driving pin moves back and forth under the action of the elastic fragment, which can realize the disconnection or closing of the electrical component; The manual switch is set on one side of the pressure switch and can control the opening and closing of electrical components.

The shrapnel itself has an upper limit pressure value and a lower limit pressure value. In response to the working pressure of the fluid or gas, the mini pressure switch realizes the up and down reversal of the shrapnel, pushes the driving pin, and realizes the disconnection and connection of the electrical components in the housing, thereby controlling and Start and stop electrical appliances connected to the pressure switch. The manual switch is configured to manually turn on or off electrical components to control the start and stop of electrical appliances connected to the pressure switch.

Here, the disc-shaped partition not only functions to separate the interior of the housing, but also guides the movement of the driving pin. The assembly of the sealing ring and the airtight film plays a sealing role to prevent gas or fluid from entering the right chamber and affecting the use of electrical components. The type of pressure switch housing does not matter; the internal components can also be accommodated in housings of different shapes.

Among them, the manual switch is arranged in this way. The housing 1 extends to one side to form a box 2 connected with the housing. The box 2 is provided with a switch base 9. The manual switch is a button 10. The button 10 is rotatably arranged on the switch seat 9, and the button rocker 10-1 extends into the switch seat 9; a transmission shaft 11 is provided at the connection between the housing 1 and the box 2. One end of the transmission shaft 11 is located in the box and fixed on the button rocker, and the other end extends into the housing. The end of the transmission shaft located in the housing is provided with a blade 12. The rotation of the transmission shaft drives the rotation of the blade to control the electrical components. Open and close. Press the button back and forth to control the lower end of the swing rod to move back and forth, thereby controlling the rotation of the transmission shaft. The rotation of the transmission shaft drives the blades to rotate to control the opening and closing of the electrical components.

In this embodiment, the button rocker 10-1 and the transmission shaft 11 are linked in this way. The transmission shaft 11 is provided with a swing plate 13 at one end of the box. The side of the box 2 connected to the housing 1 is provided with There is a fan-shaped groove 14. The swing plate 13 is embedded in the fan-shaped groove 14 and can move back and forth in the fan-shaped groove 14 with the transmission shaft 11 as the center. The other side of the swing plate 13 is away from the end of the transmission shaft. There is a fixed rod 15, which is movably arranged on the button rocker 10-1. Specifically, two clamping arms 16 are provided on the side of the lower end of the button lever. The fixed rod 15 is arranged between the two clamping arms 16 of the button lever. Pressing the button back and forth causes the button lever to move back and forth to drive the swing. The plate moves back and forth so that the transmission shaft fixed on the side of the other end of the swing plate can rotate back and forth circumferentially.

In addition, in order to increase the stability of the key lever, a hollow rod 17 is provided along the length direction of the key lever. The hollow rod 17 is located on the other side of the button lever. The hollow rod 17 is connected by a spring 18 There is a limit ball 19, and the limit ball 19 extends out of the hollow rod 17. The switch seat 9 is provided with an arc plate 20 on one side close to the hollow rod, and the limit ball 19 abuts against the arc plate 20. superior. The arc-shaped plate is W-shaped, with a protruding middle, and arc-shaped grooves on both sides for the limiting ball to abut. The button has two positions, open and closed, corresponding to the arc-shaped grooves on both sides of the arc-shaped plate, and the limit ball is selectively located in one of the arc-shaped grooves. The key is in the closed position by default. At this time, the key pendulum is set relatively tilted, and the limit ball abuts in an arc groove of the W-shaped arc plate under the action of the spring, making the key pendulum relatively stable and motionless; when the key is pressed When it is in the disconnected position, the button rocker tilts to the other side, and the limiting ball shrinks inward across the middle protrusion and moves into another arc-shaped groove, so that the button rocker is relatively stable and motionless.

In order to facilitate installation, the switch base 9 is a convex hollow body with a mounting plate 9-1 on the top. One end of the switch base 9 with the mounting plate 9-1 is a large diameter end. The switch base 9 is away from the mounting plate. One end is detachably arranged in the box and fixed with the box. The button 10 is rotatably mounted on the switch seat through fixed axes on both sides, and its swing rod 10-1 extends into the switch seat. The fixed rod 15 on the other side of the swing plate 13 passes through the switch seat and is set at the lower end of the switch seat. between the two clamping arms of the rod.

In this embodiment, the electrical components include a static contact insert 21 and a movable contact insert 22. The inner ends of the static contact insert 21 and the movable contact insert 22 are fixed in the housing, so The static contact insert 21 and the movable contact insert 22 extend outward from the housing to form two terminals 24. The inner end of the movable contact insert 22 is connected to a current-carrying element 23. The current-carrying element 23 In contact with the inner end of the stationary contact plug 21, the current-carrying element 23 can be forced to move away from the inner end of the stationary contact plug or return to contact the inner end of the stationary contact plug. The current-carrying element is a movable, conductive leaf spring that is biased into an elliptical ring to hold the inner ends of the movable contact plug and the inner end of the stationary contact plug together unless external force is applied. ; That is, the static contact insert and the moving contact insert are "normally closed" in an electrical sense. Of course, according to customer needs, the inner ends of the static contact inserts and moving contact inserts can also be designed to be normally open.

Specifically, the driving pin 8 corresponds to the current-carrying element 23 of the electrical component. The driving pin 8 passes through the guide through hole in the center of the disc-shaped partition 3 and can move up and down freely along the guide through hole. The driving pin can contact both the elastic piece and the current-carrying element. When the elastic piece is under no pressure, the driving pin does not move. The inner ends of the static contact insert and the moving contact insert contact each other through the current-carrying element, and the circuit is closed; when the elastic piece is under pressure The pressure moves the drive pin, pushing the current-carrying element away from the inner end of the static contact blade, thereby interrupting the circuit.

The blades 12 of the transmission shaft 11 are fixed on the current-carrying element 23. The rotation of the transmission shaft drives the blades to rotate, so that the current-carrying element moves away from the inner end of the static contact plug or returns to contact the inner end of the static contact plug. Since one end of the transmission shaft is fixed on the swing plate, and the other end is flexibly extended into the housing, the end of the swing plate away from the transmission shaft rotates back and forth, which can drive the transmission shaft to rotate circumferentially. The blades are fixed on the transmission shaft and move back and forth with the transmission shaft. Drive the current-carrying element to move back and forth.

In addition, the housing 1 includes a joint 1-1, a main housing 1-2, and a sealing sleeve 1-3. The joint 1-1 has a pressure inlet 7 and an open inner cavity connected to the pressure inlet. The electrical The components are arranged in the main housing 1-2, the disc-shaped partition 3 is clamped between the joint 1-1 and the main housing 1-2, and the sealing sleeve 1-3 is arranged between the joint 1-1 and the disc. The outer sides of the shaped divider 3 and the main housing 1-2 fix the joint, the disc-shaped divider and the main housing together. Specifically, a concave edge is provided on the pressure inlet end of the joint. One end of the main housing close to the disk-shaped partition has a transition section. The sealing sleeve is an inverted concave structure with a through hole on the top, which is inserted from one end of the joint. , its top is set close to the concave edge of the joint, and its lower part is tightened at the transition section of the main shell.

Further, the disc-shaped partition 3 is provided at one end close to the joint and extends into the inner cavity of the joint, and a groove 3-1 is provided on the end surface of the disc-shaped partition close to the joint, and the elastic piece 6 is arranged in the groove. , the sealing ring 4 and the air-impermeable film 5 are clamped between the inner side of the joint and the disk-shaped partition. The end of the disk-shaped partition close to the main housing extends into the inner cavity of the main housing. The structure of the spring piece is similar to a "snap disk". It has a frustoconical shape with a flattened central part. It can bounce and recover between the open position and the closed position. The spring piece is set in the groove to allow it to bounce or recover. Recovery provides space. When arranged, the side of the elastic piece away from the driving pin protrudes outward to form a concave surface in contact with the driving pin. The outward protrusion of the elastic piece will push up the air-impermeable film outwards. Both ends of the disc-shaped partition extend into the joint and the inner cavity of the main housing respectively, ensuring good sealing.

The working principle of this combined mini pressure switch is: when the mini pressure switch is energized, the electrical components are in the on state, and the electrical appliances connected to it start to work. When the measured pressure exceeds the upper limit pressure value, the shrapnel reverses and moves downward. The driving pin is moved downward, causing the electrical components to be in a disconnected state, causing the electrical appliances connected to it to stop working. When the measured pressure is lower than the lower limit pressure value, the shrapnel reverses back and moves upward to reset, and the driving pin moves upward to cause the electrical components to stop working. In the connected state, the electrical appliances connected to it start to work. The manual switch button is in the closed position by default. At this time, the inner ends of the static contact blades and the moving contact blades are "normally closed". If necessary, you can press the button to move it to the open position to make the static contacts The inner ends of the insert and the moving contact insert are disconnected.

Claims (8)

1. A combined mini pressure switch, characterized in that it includes a pressure switch and a manual switch. The pressure switch includes a housing, and electrical components are provided in the housing. The electrical components respond to the working pressure of gas or fluid. It can realize opening or closing; one end of the housing has a pressure inlet, and the inside of the housing is divided into an upper chamber and a lower chamber through a disc-shaped partition. The upper chamber is sequentially provided with sealing rings and airtight sealing rings. film and elastic pieces. A driving pin is movablely inserted in the center of the disk-shaped partition. The upper end of the driving pin extends into the upper chamber to correspond to the center of the elastic piece, and its lower end extends into the lower chamber to correspond to the electrical components. It can Realize the opening and closing of electrical components; the manual switch is arranged on one side of the pressure switch and can control the opening and closing of electrical components. 2. The combined mini pressure switch according to claim 1, characterized in that: the housing extends to one side to form a box connected to the housing, and a switch seat is provided on the box. The manual switch is a button, and the button is rotatably arranged on the switch seat, and the button rocker extends into the switch seat; a transmission shaft is provided at the connection between the housing and the box, and one end of the transmission shaft is located It is inside the box and fixed on the button rocker, and the other end is extended into the housing. The transmission shaft is provided with a blade at one end inside the housing. The rotation of the transmission shaft drives the rotation of the blade to control the opening and closing of the electrical components. 3. The combined mini pressure switch according to claim 2, characterized in that: the transmission shaft is provided with a swing plate at one end of the box, and a fan-shaped groove is provided on one side of the box connected to the housing. , the swing plate is embedded in the fan-shaped groove, and can move back and forth in the fan-shaped groove with the transmission shaft as the center. The other side of the swing plate has a fixed rod at one end away from the transmission shaft, and the fixed rod is movable On the key pendulum, the pendulum moves back and forth to drive the swing plate to move back and forth, so that the transmission shaft can rotate back and forth circumferentially. 4. The combined mini pressure switch according to claim 2, characterized in that: the button rocker is provided with a hollow rod along the length direction of the rocker, and a limiting ball is connected to the hollow rod through a spring, and the The limit ball extends out of the hollow rod and is provided with an arc plate on one side of the switch seat close to the hollow rod. The limit ball abuts against the arc plate. 5. The combined mini pressure switch according to claim 2, characterized in that: the switch base is a convex hollow body with a mounting plate, and one end of the switch base with the mounting plate is a large diameter end. The end of the seat away from the installation plate is detachably arranged in the box body. 6. The combined mini pressure switch according to claim 1, characterized in that: the electrical components include a static contact insert and a moving contact insert, and the static contact insert and the moving contact insert are The inner end is fixed in the housing, and the static contact insert and the moving contact insert extend outward from the housing to form two terminals. The inner end of the moving contact insert is connected to a current-carrying element. The current-carrying element is in contact with the inner end of the static contact plug, and the current-carrying element can be forced to move away from the inner end of the static contact plug or return to contact the inner end of the static contact plug. 7. The combined mini pressure switch according to claim 1, wherein the housing includes a joint, a main housing, and a sealing sleeve, and the joint has a pressure inlet and an open inner cavity connected to the pressure inlet. The electrical component is provided in the main housing, the disk-shaped partition is clamped between the joint and the main housing, and the sealing sleeve is provided outside the joint, the disk-shaped partition and the main housing. 8. The combined mini pressure switch according to claim 7, characterized in that: one end of the disk-shaped separator close to the joint extends into the inner cavity of the joint, and a recess is provided on the end surface of one side of the disc-shaped separator close to the joint. groove, the elastic piece is arranged in the groove, the sealing ring and the air-impermeable film are clamped between the inside of the joint and the disc-shaped separator, and one end of the disc-shaped separator close to the main housing extends into the inner cavity of the main housing set up.