CN220672466U

CN220672466U - Combined mini pressure switch

Info

Publication number: CN220672466U
Application number: CN202322336553.1U
Authority: CN
Inventors: 申俊杰; 乔·古斯塔夫森; 胡田彬; 杜娟娟
Original assignee: Qiao Gusitafusen; Hebi Jinke Electric Appliance Co ltd
Current assignee: Qiao Gusitafusen; Hebi Jinke Electric Appliance Co ltd
Priority date: 2023-08-30
Filing date: 2023-08-30
Publication date: 2024-03-26
Anticipated expiration: 2033-08-30

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

Combined mini pressure switch

Technical Field

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

Background

In the industrial process control and technical measurement process, the mechanical pressure switch is increasingly widely applied due to the characteristics of high mechanical strength, convenient production and the like of the elastic sensitive element of the mechanical pressure switch. The working process of the mechanical pressure switch is as follows: the elastic element of the pressure switch generates elastic deformation along with the change of pressure, the free end of the elastic element generates displacement to directly or indirectly push the switch element, and the on-off state of the switch element is changed, so that the aim of controlling the measured pressure is fulfilled. The existing pressure switch of the company is relatively complex in structure and high in cost, so that market price is relatively high, and therefore, in order to increase market share, a miniature pressure switch with small structure and high cost performance is developed under the condition of meeting the technical requirements of clients.

Disclosure of Invention

The utility model provides a combined mini pressure switch which is small in structure and high in cost performance.

The technical scheme adopted by the utility model is as follows:

a combined mini pressure switch comprising a pressure switch, a manual switch, the pressure switch comprising a housing having an electrical component disposed therein, the electrical component being capable of opening or closing in response to an operating pressure of a 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.

Preferably, the shell extends to one side to form a box body communicated with the shell, a switch seat is arranged on the box body, the manual switch is a key, the key is rotatably arranged on the switch seat, and a key swing rod extends into the switch seat to be arranged; the shell is provided with a transmission shaft at the position where the shell is communicated with the box body, one end of the transmission shaft is positioned in the box body and fixed on the key swing rod, the other end of the transmission shaft stretches into the shell to be arranged, one end of the transmission shaft positioned in the shell is provided with blades, and the transmission shaft rotates to drive the blades to rotate so as to control the opening and closing of the electrical components.

Preferably, the transmission shaft is provided with the swinging plate at one end of the box, a sector groove is formed in one side surface of the box, which is communicated with the shell, the swinging plate is embedded in the sector groove and can move back and forth in the sector groove by taking the transmission shaft as the center, a fixing rod is arranged at one end, far away from the transmission shaft, of the other side surface of the swinging plate, the fixing rod is movably arranged on the key swinging rod, and the swinging rod moves back and forth to drive the swinging plate to move back and forth, so that the transmission shaft can rotate back and forth in the circumferential direction.

Preferably, the key swing rod is provided with a hollow rod along the length direction of the swing rod, a limit ball is connected in the hollow rod through a spring, the limit ball extends out of the hollow rod, one side of the switch seat, which is close to the hollow rod, is provided with an arc plate, and the limit ball is abutted against the arc plate.

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

Preferably, the electrical component comprises a stationary contact insert and a movable contact insert, wherein the inner ends of the stationary contact insert and the movable contact insert are fixed in the shell, the stationary contact insert and the movable contact insert extend outwards from the shell to form two wiring terminals, the inner end of the movable contact insert is connected with a current carrying element, the current carrying element is contacted with the inner end of the stationary contact plug, and the current carrying element can be stressed to move away from the inner end of the stationary contact plug or return to contact with the inner end of the stationary contact plug.

Preferably, the housing includes a joint having a pressure inlet and an open inner cavity communicating with the pressure inlet, a main housing, a sealing sleeve, the electrical component being disposed within the main housing, the disc separator being sandwiched between the joint and the main housing, the sealing sleeve being disposed outside the joint, the disc separator and the main housing.

Preferably, one end of the disc-shaped partition piece, which is close to the joint, extends into the inner cavity of the joint, the end face of one side, which is close to the joint, of the disc-shaped partition piece is provided with a groove, the elastic sheet is arranged in the groove, the sealing ring and the airtight film are clamped between the inner side of the joint and the disc-shaped partition piece, and one end, which is close to the main shell, of the disc-shaped partition piece extends into the inner cavity of the main shell.

Compared with the prior art, the utility model has the beneficial effects that: 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, so that the arrangement of the disc-shaped partition piece is convenient, and the processing and the assembly are convenient; meanwhile, a manual switch is integrated, and the manual switch can be forcibly disconnected when accidents occur, so that major accidents are avoided.

Drawings

Fig. 1 is a front view of the present utility model.

Fig. 2 is a front view of fig. 1.

Fig. 3 is a cross-sectional view A-A of fig. 2.

Fig. 4 is a sectional view of B-B in fig. 2.

Fig. 5 is a bottom view of fig. 1.

Fig. 6 is a cross-sectional view of fig. 5C-C.

Fig. 7 is a sectional view of D-D in fig. 5.

In the figure: 1. a housing; 2. a case; 3. a disc-shaped partition; 4. a seal ring; 5. a gas impermeable film; 6. a spring plate; 7. a pressure inlet; 8. a drive pin; 9. a switch base; 10. a key; 11. a transmission shaft; 12. a blade; 13. a swinging plate; 14. a fan-shaped groove; 15. a fixed rod; 16. a clamping arm; 17. a hollow rod; 18. a spring; 19. a limit ball; 20. an arc-shaped plate; 21. a stationary contact insert; 22. a movable contact insert; 23. a current carrying element; 24. a connection terminal; 1-1, a joint; 1-2, a main housing; 1-3, sealing sleeve; 3-1, grooves; 9-1, mounting plates; 10-1, a key swing rod.

Detailed Description

The present utility model will be further described with reference to the following embodiments in order to make the objects, technical solutions and advantages of the present utility model more apparent. Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to be limiting of the present patent; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The combined mini pressure switch comprises a pressure switch and a manual switch, wherein the pressure switch comprises a shell 1, and an electric component is arranged in the shell 1 and can be opened or closed in response to the working pressure of gas or fluid; one end of the shell 1 is provided with a pressure inlet 7 which is connected with a pipeline to realize the entry of gas or fluid, the interior of the shell 1 is divided into an upper cavity and a lower cavity by a disc-shaped partition 3, a sealing ring 4, an airtight film 5 and a spring plate 6 are sequentially arranged in the upper cavity from top to bottom, a driving pin 8 is movably inserted in the center of the disc-shaped partition 3, the upper end of the driving pin 8 stretches into the upper cavity to correspond to the center of the spring plate, the lower end of the driving pin stretches into the lower cavity to correspond to an electric component, and the driving pin moves back and forth under the action of the spring plate to realize the opening or closing of the electric component; the manual switch is arranged on one side of the pressure switch and can control the opening and closing of the electric components.

The elastic sheet is provided with an upper limit pressure value and a lower limit pressure value, the mini pressure switch responds to the working pressure of fluid or gas, realizes the up-down reversion of the elastic sheet, pushes the driving pin, and realizes the disconnection and connection of electric components in the shell, thereby controlling the starting and stopping of an electric appliance connected with the pressure switch. The manual switch is configured to manually turn on or off the electrical components to control the activation and deactivation of the appliance connected to the pressure switch.

Here, the disc-shaped partition serves both to partition the interior of the housing and to guide the movement of the drive pin. The assembly of sealing washer and airtight film plays sealed effect, avoids gas or fluid to get into right cavity, influences the use of electrical components. The type of pressure switch housing is not critical, and the internal components thereof may also be accommodated in housings of different profiles.

The manual switch is arranged in such a way that a box body 2 communicated with the shell body is formed by extending the shell body 1 to one side, a switch seat 9 is arranged on the box body 2, the manual switch is a key 10, the key 10 is rotatably arranged on the switch seat 9, and a key swing rod 10-1 extends into the switch seat 9 to be arranged; the shell 1 is provided with transmission shaft 11 with the box 2 department that communicates, transmission shaft 11 one end is located the box and fixes on the button pendulum rod, and the other end stretches into the setting in the shell, the transmission shaft is provided with blade 12 in the one end that is located the shell, the transmission shaft rotation drives the blade rotation and controls opening and closing of electrical components. The key is pressed back and forth to control the swing rod at the lower end to move back and forth, so that the transmission shaft is controlled to rotate, and the transmission shaft rotates to drive the blades to rotate to control the opening and closing of the electrical components.

In this embodiment, the key swing rod 10-1 and the transmission shaft 11 are linked in such a way, one end of the transmission shaft 11 located in the box body is provided with a swing plate 13, one side surface of the box body 2 communicated with the shell 1 is provided with 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 by taking the transmission shaft 11 as a center, one end, far away from the transmission shaft, of the other side surface of the swing plate 13 is provided with a fixing rod 15, and the fixing rod 15 is movably arranged on the key swing rod 10-1. Specifically, two clamping arms 16 are arranged on the side face of the swing rod at the lower end of the key, the fixing rod 15 is arranged between the two clamping arms 16 of the swing rod of the key, and the key is pressed back and forth, so that the swing rod of the key moves back and forth to drive the swing plate to move back and forth, and the transmission shaft fixed on the side face of the other end of the swing plate can circumferentially rotate back and forth.

In addition, in order to increase the stability of button pendulum rod, be provided with cavity pole 17 along pendulum rod length direction on the button pendulum rod, this cavity pole 17 is located button pendulum rod another side, be connected with spacing ball 19 in the cavity pole 17 through spring 18, just spacing ball 19 stretches out cavity pole 17 setting, one side that switch seat 9 is close to the cavity pole is provided with arc 20, spacing ball 19 supports and leans on arc 20. The arc plate is W-shaped, the middle part of the arc plate is convex, and two sides of the arc plate are provided with arc grooves which are convenient for the limiting balls to abut against. The key is provided with an opening position and a closing position, corresponds to the arc grooves on two sides of the arc plate, and the limiting ball is selectively positioned in one of the arc grooves. The key is in a closed position by default, at the moment, the key swing rod is arranged in a relatively inclined way, and the limiting ball is abutted against an arc-shaped groove of the W-shaped arc-shaped plate under the action of a spring, so that the key swing rod is relatively stable and motionless; when the key is pressed to be in the disconnection position, the key swing rod is inclined to the other side, and the limiting ball is contracted inwards to move into the other arc-shaped groove beyond the middle bulge, so that the key swing rod is relatively stable and motionless.

For convenient installation, the switch seat 9 is a convex hollow body with a mounting plate 9-1 at the top, one end of the switch seat 9 with the mounting plate 9-1 is a large-diameter end, and one end of the switch seat 9 far away from the mounting plate is detachably arranged in the box body and is fastened and fixed with the box body. The key 10 is rotatably arranged on the switch seat through fixing shafts on two sides of the key, the swing rod 10-1 of the key extends into the switch seat to be arranged, and the fixing rod 15 on the other side surface of the swing plate 13 penetrates through the switch seat to be arranged between two clamping arms of the swing rod at the lower end.

In this embodiment, the electrical component includes a stationary contact insert 21 and a movable contact insert 22, the inner ends of the stationary contact insert 21 and the movable contact insert 22 are fixed in the housing, the stationary contact insert 21 and the movable contact insert 22 extend outwards from the housing to form two connection terminals 24, the inner end of the movable contact insert 22 is connected with a current carrying element 23, the current carrying element 23 is in contact with the inner end of the stationary contact plug 21, and the current carrying element 23 can be forced to move away from the inner end of the stationary contact plug or return to contact with the inner end of the stationary contact plug. The current carrying element is a movable, electrically conductive leaf spring biased into an elliptical ring to hold the inner ends of the movable and stationary contact plugs together unless an external force is applied; namely a stationary contact insert and a movable contact insert, are "normally closed" in an electrical sense. Of course, the inner ends of the fixed contact insert and the movable contact insert can be designed to be normally open according to the requirements of customers.

Specifically, the driving pin 8 corresponds to the current carrying element 23 of the electric component, and the driving pin 8 passes through a guide through hole in the center of the disc-shaped partition 3 and is freely movable up and down along the guide through hole. The driving pin can be contacted with the elastic sheet and the current-carrying element, the driving pin does not move when the elastic sheet is in no pressure, the inner ends of the fixed contact inserting sheet and the movable contact inserting sheet are contacted with each other through the current-carrying element, and the circuit is closed; when the spring plate is pressed to enable the driving pin to move, the current carrying element is pushed to be far away from the inner end of the fixed contact inserting piece, and therefore the circuit is cut off.

Blades 12 of the transmission shaft 11 are fixed on the current-carrying element 23, and the transmission shaft rotates to drive the blades to rotate, so that the current-carrying element is far away from the inner end of the static contact plug or returns to contact with the inner end of the static contact plug. Because transmission shaft one end is fixed on the swing plate, and the other end activity stretches into the setting in the casing, and the swing plate is kept away from the one end round trip rotation of transmission shaft, can drive transmission shaft circumference rotation, and the blade is fixed on the transmission shaft along with transmission shaft round trip movement, and then drives current-carrying component round trip movement.

In addition, the housing 1 comprises a joint 1-1, a main housing 1-2, a sealing sleeve 1-3, the joint 1-1 is provided with a pressure inlet 7 and an open inner cavity communicated with the pressure inlet, the electric component is 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 outside the joint 1-1, the disc-shaped partition 3 and the main housing 1-2 to fix the joint, the disc-shaped partition and the main housing together. Specifically, a circle of concave edge is arranged on the pressure inlet end face of the joint, one end of the main shell close to the disc-shaped partition piece is provided with a transition section, the sealing sleeve is of an inverted concave structure with a through hole at the top, one end of the sealing sleeve is sleeved in the sealing sleeve, the top of the sealing sleeve is tightly attached to the concave edge of the joint, and the lower part of the sealing sleeve is located at the transition section of the main shell and is tightened.

Further, one end of the disc-shaped partition 3 close to the joint is arranged in an inner cavity of the joint and stretches into the joint, a groove 3-1 is formed in the end face of one side of the disc-shaped partition close to the joint, the elastic sheet 6 is arranged in the groove, the sealing ring 4 and the airtight film 5 are clamped between the inner side of the joint and the disc-shaped partition, and one end of the disc-shaped partition close to the main shell stretches into the inner cavity of the main shell and is arranged. The spring plate structure is similar to a 'buckling disk', is in a truncated cone shape with a flattened central part, can be sprung and restored between an open position and a closed position, is arranged in the groove, provides space for the spring plate to be sprung or restored, and is outwards protruded at one side of the spring plate far away from the driving pin during arrangement to form a concave surface contacted with the driving pin, and the outer protrusion of the spring plate can outwards jack the airtight film. The two ends of the disc-shaped partition piece extend into the joint and the inner cavity of the main shell respectively, so that good sealing performance can be ensured.

The working principle of the combined mini pressure switch is as follows: when the mini pressure switch is electrified, the electric component is in an on state, the electric appliance connected with the mini pressure switch starts to work, when the measured pressure exceeds an upper limit pressure value, the elastic sheet reversely moves downwards to enable the driving pin to move downwards, so that the electric component is in an off state, the electric appliance connected with the mini pressure switch stops working, when the measured pressure is low in a lower limit pressure value, the elastic sheet reversely moves upwards again to reset, the driving pin moves upwards to enable the electric component to be in an on state, and the electric appliance connected with the elastic sheet starts to work. The manual switch key is in a closed position by default, at the moment, the inner ends of the fixed contact inserting sheet and the movable contact inserting sheet are normally closed, and when necessary, the key can be pressed to move to an open position, so that the inner ends of the fixed contact inserting sheet and the movable contact inserting sheet are disconnected.

Claims

1. A combination mini pressure switch, characterized in that: the pressure switch comprises a shell, wherein an electric component is arranged in the shell, and the electric component 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.

2. The combination mini-pressure switch of claim 1, wherein: the manual switch is a key, the key is rotatably arranged on the switch seat, and the key swing rod extends into the switch seat to be arranged; the shell is provided with a transmission shaft at the position where the shell is communicated with the box body, one end of the transmission shaft is positioned in the box body and fixed on the key swing rod, the other end of the transmission shaft stretches into the shell to be arranged, one end of the transmission shaft positioned in the shell is provided with blades, and the transmission shaft rotates to drive the blades to rotate so as to control the opening and closing of the electrical components.

3. The combination mini-pressure switch of claim 2, wherein: the utility model discloses a fan-shaped swing device for the electric motor is characterized in that a fan-shaped groove is formed in one end of a transmission shaft, which is located on a box body, a fan-shaped groove is formed in one side surface, which is communicated with a shell, of the box body, the swing plate is embedded in the fan-shaped groove and can move back and forth in the fan-shaped groove by taking the transmission shaft as a center, a fixed rod is arranged at one end, which is far away from the transmission shaft, of the other side surface of the swing plate, the fixed rod is movably arranged on a button swing rod, and the swing rod moves back and forth to drive the swing plate to move back and forth so that the transmission shaft can rotate back and forth in the circumferential direction.

4. The combination mini-pressure switch of claim 2, wherein: the key swing rod is provided with a hollow rod along the length direction of the swing rod, a limit ball is connected in the hollow rod through a spring, the limit ball extends out of the hollow rod, one side, close to the hollow rod, of the switch seat is provided with an arc plate, and the limit ball is abutted against the arc plate.

5. The combination mini-pressure switch of claim 2, wherein: the switch seat is a convex hollow body with a mounting plate, one end of the switch seat with the mounting plate is a large-diameter end, and one end of the switch seat far away from the mounting plate is detachably arranged in the box body.

6. The combination mini-pressure switch of claim 1, wherein: the electric component comprises a fixed contact insert and a movable contact insert, wherein the inner ends of the fixed contact insert and the movable contact insert are fixed in a shell, the fixed contact insert and the movable contact insert outwards extend out of the shell to form two wiring terminals, the inner end of the movable contact insert is connected with a current carrying element, the current carrying element is contacted with the inner end of the fixed contact plug, and the current carrying element can be stressed to move away from the inner end of the fixed contact plug or return to contact with the inner end of the fixed contact plug.

7. The combination mini-pressure switch of claim 1, wherein: the housing comprises a joint, a main housing and a sealing sleeve, wherein the joint is provided with a pressure inlet and an open inner cavity communicated with the pressure inlet, the electric component is arranged in the main housing, the disc-shaped partition piece is clamped between the joint and the main housing, and the sealing sleeve is arranged outside the joint, the disc-shaped partition piece and the main housing.

8. The combination mini-pressure switch of claim 7, wherein: the sealing ring and the airtight film are clamped between the inner side of the joint and the disc-shaped partition, and one end of the disc-shaped partition, which is close to the main shell, extends into the inner cavity of the main shell.