A dual-way pressure switch

Abstract

This technical solution discloses a dual-circuit pressure switch, comprising a bottom shell, a base, a switch housing, a lifting and pushing assembly, a switch top plate, and a pair of switch assemblies. The bottom of the bottom shell is provided with an inlet, and a sealing gasket is sandwiched between the base and the bottom shell. The lifting and pushing assembly comprises a lifting fork and a lifting connection frame. The lifting fork comprises a lifting bracket and a piston pusher. The lifting bracket is located in the middle of the movable cavity. The piston pusher is fixed to the lower end of the lifting bracket, and the lower end of the piston pusher is in contact with the sealing gasket. An elastic pressure member is provided at the upper end of the lifting bracket. A lifting limiter is provided in the middle of the lifting bracket, and a lifting connection frame is sleeved on the lifting limiter. A jumper and a lifting connection frame are connected on both sides of the lifting connection frame. The switch assembly comprises a jumper, a jumper spring, and a movable contact piece. The movable contact piece is fixed to the upper end of the jumper. A pair of static contacts are provided at the lower end of the switch top plate, and the static contacts are located directly above the movable contact piece. This technical solution simplifies the internal structure of the pressure switch.

Description

Technical Field

[0001] The present technical solution relates to the technical field of pressure control, and in particular to a dual-way pressure switch. Background Art

[0002] Pressure switches utilize high-precision, high-stability pressure sensors and transmission circuits, coupled with dedicated CPU modular signal processing technology, to detect, display, alarm, and output control signals for media pressure signals. Pressure switches are widely used in the petroleum, chemical, metallurgical, electric power, and water supply industries to measure and control the gauge and absolute pressures of various gases and liquids, making them ideal intelligent measurement and control instruments for industrial sites. Currently, existing pressure switches have complex internal structures and low integration levels, making their production and processing more difficult and costly.

[0003] Technical solution content

[0004] In view of the shortcomings of the existing technology, the purpose of this technical solution is to provide a dual-way pressure switch to simplify the internal structure of the pressure switch, improve the structural integration and reduce costs.

[0005] To achieve the above-mentioned purpose, the present technical solution provides the following technical solutions: a two-way pressure switch, comprising a bottom shell, a base, a switch housing, a switch top plate, a lifting and pushing assembly, and a pair of switch assemblies;

[0006] An inlet is provided at the bottom of the bottom shell, a sealing gasket is sandwiched between the base and the bottom shell, a lifting opening is provided at the bottom of the base, the lifting opening is located at the upper end of the sealing gasket, the switch housing is provided at the upper end of the base, an active cavity is provided in the switch housing, and the lifting opening is connected to the active cavity;

[0007] The lifting and pushing assembly includes a lifting fork and a lifting connection frame. The lifting fork includes a lifting bracket and a piston pushing part. The lifting bracket is located in the middle of the movable cavity. The piston pushing part is fixed to the lower end of the lifting bracket. The lower end of the piston pushing part is in contact with the sealing gasket. When fluid enters the inlet, the sealing gasket pushes the piston moving part. The piston pushing part is slidably sleeved in the lifting port.

[0008] An elastic pressing member is further provided at the upper end of the lifting bracket, and the elastic pressing member is used to apply vertical downward pressure to the lifting bracket;

[0009] A lifting limit portion is provided in the middle of the lifting bracket, and the lifting connection frame is slidably sleeved on the lifting limit portion;

[0010] A pair of switch assemblies are symmetrically arranged in the movable cavity on both sides of the lifting connection frame, and the switch assembly includes a jumping member, a jumping spring and a moving contact piece. The two ends of the jumping spring are respectively fixed to the lifting connection frame and the jumping member. The moving contact piece is fixedly arranged at the upper end of the jumping member, and a moving contact point is provided at the upper end of the moving contact piece.

[0011] The switch top plate is arranged at the upper end of the switch housing, and a pair of static contact pieces are provided on the lower end surface of the switch top plate. The static contact pieces are located directly above the moving contact pieces, and static contacts are provided at the lower ends of the static contact pieces.

[0012] When the piston push portion moves vertically upward, the movable contact and the static contact are separated; when the piston push portion moves vertically downward, the movable contact and the static contact are in contact.

[0013] Furthermore, the dual-way pressure switch also includes a pressure differential adjustment component, which is arranged in the movable cavity. The pressure differential adjustment component includes a pressure differential adjustment screw and a limit block. A threaded sleeve is provided on the upper part of the lifting bracket, and a reset port is provided on the top plate of the switch. The threaded sleeve passes through the reset port, and the pressure differential adjustment screw thread passes through the threaded sleeve. The lower end of the pressure differential adjustment screw is against the upper end of the limit block, and the lower part of the limit block has two forks, and the two forks are respectively fixedly connected to the lifting connection frame.

[0014] Furthermore, the dual-way pressure switch further comprises a reset adjustment component, the reset adjustment component comprising a pressure adjustment knob and a pressure adjustment sleeve, the pressure adjustment sleeve being fixedly arranged above the reset port;

[0015] The pressure regulating knob includes a twisting portion and a threaded sleeve, wherein the twisting portion is arranged outside the switch housing, the threaded sleeve is fixed at the lower end of the twisting portion, and the threaded sleeve is threaded into the pressure regulating sleeve;

[0016] The elastic compression member is a spring in a compression state, a reset cavity is provided in the pressure adjustment knob, the spring is slidably sleeved in the reset cavity, the upper end of the spring is against the top inner wall of the twisting part, and the lower end of the spring is against the upper end of the threaded sleeve.

[0017] Furthermore, a limiting bolt is provided through the upper end of the jumping piece, a fixed cavity is provided inside the jumping piece, a limiting nut is fixed in the fixed cavity, the nut of the limiting bolt is used to tighten the moving contact piece, and the screw of the limiting bolt is threadedly connected to the limiting nut.

[0018] Furthermore, the lower end surface of the switch top plate is provided with a pair of upper limit limit parts, and the upper end surface of the base is provided with a pair of lower limit limit parts;

[0019] When the jumping member abuts against the lower limit limiting portion, the moving contact and the static contact are separated; when the nut of the limiting bolt abuts against the upper limit limiting portion, the moving contact and the static contact are in contact.

[0020] Furthermore, a buffer spring is provided between the movable contact piece and the jumping member, and two ends of the buffer spring respectively abut against the lower end surface of the movable contact piece and the upper end surface of the jumping member.

[0021] Furthermore, the sealing gasket is made of a flexible sealing material, and the flexible sealing material includes rubber.

[0022] Beneficial effects of this technical solution:

[0023] This technical solution arranges a lifting and pushing assembly and a switch assembly within the switch housing. A lifting fork drives the lifting connection frame to slide on the lifting limiter, which in turn drives the lifting member and the moving contact piece via a lifting spring to raise and lower them, achieving contact and separation between the moving and stationary contacts. This design simplifies the internal structure of the pressure switch, while improving structural integration and reducing costs. Furthermore, by symmetrically arranging the switch assemblies within the active cavity, this solution improves synchronization when the pair of switch assemblies operate, reducing component damage caused by asynchrony and extending the service life of the pressure switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is an internal cross-sectional view of the present invention;

[0025] Figure 2 It is a schematic diagram of the relative positions of the moving contact piece and the stationary contact piece in the present invention.

[0026] 1. Bottom shell; 11. Inlet; 2. Base; 21. Lifting port; 22. Lower limit limiter; 3. Switch housing; 31. Movable cavity; 4. Switch top plate; 41. Static contact piece; 411. Static contact; 42. Upper limit limiter; 5. Lifting push assembly; 51. Lifting fork; 511. Lifting bracket; 512. Piston pusher; 513. Lifting limiter; 514. Threaded sleeve; 52. Lifting connecting frame; 53. Elastic pressing piece; 6. Switch assembly; 61. Jumping piece; 62. Jumping spring; 63. Moving contact piece; 631. Moving contact; 64. Limiting bolt; 65. Limiting nut; 66. Buffer spring; 7. Sealing gasket; 8. Pressure differential adjustment assembly; 81. Pressure differential adjustment screw; 82. Limiting block; 9. Reset adjustment assembly; 91. Pressure adjustment knob; 92. Pressure adjustment sleeve. DETAILED DESCRIPTION

[0027] The present technical solution is further described below in conjunction with the accompanying drawings and embodiments. Identical components are denoted by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, and the terms "bottom," "top," "inner," and "outer" refer to directions toward or away from the geometric center of a particular component, respectively.

[0028] like Figure 1 and Figure 2 As shown, a dual-way pressure switch of this embodiment includes a bottom shell 1, a base 2, a switch housing 3, a switch top plate 4, a lifting and pushing assembly 5 and a pair of switch assemblies 6;

[0029] An inlet 11 is formed at the bottom of the bottom shell 1. A sealing gasket 7 is sandwiched between the base 2 and the bottom shell 1. A lifting opening 21 is formed at the bottom of the base 2. The lifting opening 21 is located above the sealing gasket 7. The switch housing 3 is disposed at the upper end of the base 2. An active cavity 31 is formed in the switch housing 3. The lifting opening 21 communicates with the active cavity 31.

[0030] The lifting and pushing assembly 5 includes a lifting fork 51 and a lifting connection frame 52. The lifting fork 51 includes a lifting bracket 511 and a piston pushing portion 512. The lifting bracket 511 is located in the middle of the movable cavity 31. The piston pushing portion 512 is fixed to the lower end of the lifting bracket 511. The lower end of the piston pushing portion 512 is in contact with the sealing gasket 7. When fluid enters the inlet 11, the sealing gasket 7 pushes the piston moving portion. The piston pushing portion 512 is slidably sleeved in the lifting port 21.

[0031] An elastic pressing member 53 is further provided at the upper end of the lifting bracket 511, and the elastic pressing member 53 is used to apply vertical downward pressure to the lifting bracket 511;

[0032] A lifting limit portion 513 is provided in the middle of the lifting bracket 511, and the lifting connection frame 52 is slidably sleeved on the lifting limit portion 513;

[0033] A pair of switch assemblies 6 are symmetrically arranged in the movable cavity 31 on both sides of the lifting connection frame 52. The switch assembly 6 includes a jump member 61, a jump spring 62 and a movable contact piece 63. The two ends of the jump spring 62 are fixedly connected to the lifting connection frame 52 and the jump member 61 respectively. The movable contact piece 63 is fixedly arranged at the upper end of the jump member 61. The upper end of the movable contact piece 63 is provided with a movable contact point 631.

[0034] The switch top plate 4 is provided at the upper end of the switch housing 3. A pair of static contact pieces 41 are provided on the lower end surface of the switch top plate 4. The static contact pieces 41 are located directly above the moving contact pieces 63. A static contact point 411 is provided at the lower end of the static contact pieces 41.

[0035] When the piston pushing portion 512 moves vertically upward, the moving contact 631 and the static contact 411 are separated; when the piston pushing portion 512 moves vertically downward, the moving contact 631 and the static contact 411 are in contact.

[0036] Specifically, in this embodiment, two moving contacts 631 are provided at the upper end of each moving contact piece 63 , and two stationary contacts 411 are provided at the lower end of each stationary contact piece 41 .

[0037] This technical solution disposes a lifting and pushing assembly 5 and a switch assembly 6 within the switch housing 3, and utilizes a lifting fork 51 to drive a lifting connection frame 52 to slide on a lifting limiter 513. This, in turn, uses a lifting spring 62 to drive a lifting member 61 and a movable contact piece 63 up and down, thereby achieving contact and separation between the movable contact 631 and the static contact 411. This design simplifies the internal structure of the pressure switch, while improving structural integration and reducing costs. Furthermore, by symmetrically arranging the switch assemblies 6 within the movable cavity 31, this technical solution achieves better synchronization when the pair of switch assemblies 6 operate, reducing component damage caused by asynchrony of the switch assemblies 6 and extending the service life of the pressure switch.

[0038] Preferably, the dual-way pressure switch also includes a pressure differential adjustment component 8, which is arranged in the movable cavity 31. The pressure differential adjustment component 8 includes a pressure differential adjustment screw 81 and a limit block 82. A threaded sleeve 514 is provided on the upper part of the lifting bracket 511, and a reset port is opened on the switch top plate 4. The threaded sleeve 514 passes through the reset port. The pressure differential adjustment screw 81 is threaded through the threaded sleeve 514. The lower end of the pressure differential adjustment screw 81 is against the upper end of the limit block 82. The lower part of the limit block 82 has two forks, and the two forks are respectively fixedly connected to the lifting connection frame 52.

[0039] When the lifting fork 51 is stopped, the pressure difference between the starting pressure and the stopping pressure is increased.

[0040] Preferably, the two-way pressure switch further includes a reset adjustment component 9, which includes a pressure adjustment knob 91 and a pressure adjustment sleeve 92, and the pressure adjustment sleeve 92 is fixedly arranged above the reset port;

[0041] The pressure regulating knob 91 includes a twisting portion and a threaded sleeve. The twisting portion is arranged outside the switch housing 3. The threaded sleeve is fixed to the lower end of the twisting portion. The threaded sleeve is threaded into the pressure regulating sleeve 92.

[0042] The elastic compression member 53 is a spring in a compression state. A reset cavity is provided in the pressure adjustment knob 91. The spring is slidably sleeved in the reset cavity. The upper end of the spring is against the top inner wall of the twisting part, and the lower end of the spring is against the upper end of the threaded sleeve 514.

[0043] Specifically, in this embodiment, by providing a pressure adjustment knob 91, the pressure of the elastic pressure member 53 on the lifting fork 51 can be adjusted: when the screwing part is screwed in the forward direction, the threaded sleeve moves downward, and the elastic pressure member 53 is compressed at this time, thereby increasing the pressure of the elastic pressure member 53 on the lifting fork 51; when the screwing part is screwed in the reverse direction, the threaded sleeve moves upward, and the elastic pressure member 53 is relaxed at this time, thereby reducing the pressure of the elastic pressure member 53 on the lifting fork 51.

[0044] Preferably, a limiting bolt 64 is provided through the upper end of the jumping piece 61, and a fixed cavity is provided inside the jumping piece 61, in which a limiting nut 65 is fixed, and the nut of the limiting bolt 64 is used to tighten the moving contact piece 63, and the screw of the limiting bolt 64 is threadedly connected to the limiting nut 65.

[0045] Specifically, in this embodiment, by providing the limiting bolt 64 , the movable contact piece 63 is fixed and pressed, thereby improving the stability of this technical solution.

[0046] Preferably, the lower end surface of the switch top plate 4 is provided with a pair of upper limit limit portions 42, and the upper end surface of the base 2 is provided with a pair of lower limit limit portions 22;

[0047] When the jumping member 61 abuts against the lower limit portion 22, the moving contact 631 and the static contact 411 are separated; when the nut of the limiting bolt 64 abuts against the upper limit portion 42, the moving contact 631 and the static contact 411 are in contact.

[0048] Specifically, in this embodiment, by providing the upper limit limiting portion 42 and the lower limit limiting portion 22 , the vertical limit of the jump member 61 is achieved, thereby improving the structural stability of the pressure switch.

[0049] Preferably, a buffer spring 66 is provided between the movable contact piece 63 and the jumping member 61 , and two ends of the buffer spring 66 respectively abut against the lower end surface of the movable contact piece 63 and the upper end surface of the jumping member 61 .

[0050] Specifically, in this embodiment, by providing a buffer spring 66, effective buffering of the moving contact piece 63 is achieved when the jumping member 61 jumps, thereby avoiding damage to the moving contact piece 63 due to excessive jumping, and improving the durability of this technical solution; wherein, the jumping force of the jumping spring 62 is much greater than the buffering reset force of the buffer spring 66, to ensure that the switch assembly 6 can jump and open normally.

[0051] Preferably, the sealing gasket 7 is made of a flexible sealing material, and the flexible sealing material includes rubber.

[0052] Working principle:

[0053] When fluid enters the inlet 11, the fluid enters the bottom shell 1 and generates vertical upward pressure on the sealing gasket 7. At the same time, the elastic pressure member 53 exerts vertical downward pressure on the lifting fork 51. When the pressure of the fluid on the sealing gasket 7 is greater than the pressure of the elastic pressure member 53 on the lifting fork 51, the sealing gasket 7 pushes the piston pusher 512 of the lifting fork 51 to move upward. At this time, the lifting connection frame 52 slides on the lifting limit portion 513 to the bottom end of the lifting limit portion 513. At this time, the jumping springs 62 at both ends of the lifting connection frame 52 are in an eight-shaped shape, causing the jumping member 61 to jump downward, thereby dragging the pair of moving contact pieces 63 on the left and right of the jumping member 61 to move downward synchronously, thereby causing the moving contacts 631 on the pair of moving contact pieces 63 to completely separate from the corresponding static contacts 411 above, and the pressure switch is disconnected.

[0054] When the pressure of the fluid on the sealing gasket 7 is less than the pressure of the elastic pressure member 53 on the lifting fork 51, the lifting fork 51 is pushed downward by the pressure of the elastic pressure member 53. At this time, the lifting connection frame 52 slides on the lifting limiter 513 to the top of the lifting limiter 513. At this time, the jumping springs 62 at both ends of the lifting connection frame 52 form an inverted figure eight shape, causing the jumping member 61 to jump upward, thereby dragging the pair of movable contact pieces 63 on the left and right of the jumping member 61 to move upward synchronously, thereby causing the movable contacts 631 on the pair of movable contact pieces 63 to fully contact the corresponding static contacts 411 above, and the pressure switch is turned on.

[0055] The above are only preferred implementations of this technical solution. The scope of protection of this technical solution is not limited to the above embodiments. All technical solutions based on the concept of this technical solution are within the scope of protection of this technical solution. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of this technical solution should also be considered within the scope of protection of this technical solution.

Claims

1. A dual-circuit pressure switch, characterized in that: It comprises a bottom shell (1), a base (2), a switch housing (3), a switch top plate (4), a lifting and pushing assembly (5) and a pair of switch assemblies (6); The bottom of the bottom shell (1) is provided with an inlet (11), a sealing gasket (7) is sandwiched between the base (2) and the bottom shell (1), a lifting opening (21) is provided at the bottom of the base (2), the lifting opening (21) is located at the upper end of the sealing gasket (7), the switch housing (3) is arranged at the upper end of the base (2), an active cavity (31) is provided in the switch housing (3), and the lifting opening (21) is connected to the active cavity (31); The lifting and pushing assembly (5) includes a lifting fork (51) and a lifting connection frame (52), the lifting fork (51) includes a lifting bracket (511) and a piston pushing portion (512), the lifting bracket (511) is located in the middle of the movable cavity (31), the piston pushing portion (512) is fixed to the lower end of the lifting bracket (511), the lower end of the piston pushing portion (512) is in contact with the sealing gasket (7), and the sealing gasket (7) pushes the piston pushing portion when fluid enters the inlet (11), and the piston pushing portion (512) is slidably sleeved in the lifting port (21); An elastic pressing member (53) is further provided at the upper end of the lifting bracket (511), and the elastic pressing member (53) is used to apply vertical downward pressure to the lifting bracket (511); A lifting limit portion (513) is provided in the middle of the lifting bracket (511), and the lifting connection frame (52) is slidably sleeved on the lifting limit portion (513); A pair of switch assemblies (6) are symmetrically arranged in the movable cavity (31) on both sides of the lifting connection frame (52), and the switch assembly (6) includes a jumping piece (61), a jumping spring (62) and a moving contact piece (63), the two ends of the jumping spring (62) are respectively fixed to the lifting connection frame (52) and the jumping piece (61), the moving contact piece (63) is fixed to the upper end of the jumping piece (61), and the upper end of the moving contact piece (63) is provided with a moving contact point (631); The switch top plate (4) is arranged at the upper end of the switch housing (3); a pair of static contact pieces (41) are provided on the lower end surface of the switch top plate (4); the static contact pieces (41) are located directly above the movable contact pieces (63); and a static contact point (411) is provided at the lower end of the static contact pieces (41); When the piston pushing portion (512) moves vertically upward, the moving contact (631) and the static contact (411) separate; when the piston pushing portion (512) moves vertically downward, the moving contact (631) and the static contact (411) contact.

2. The dual-way pressure switch according to claim 1, characterized in that: The dual-way pressure switch further comprises a pressure differential adjustment component (8), the pressure differential adjustment component (8) being arranged in the movable cavity (31), the pressure differential adjustment component (8) comprising a pressure differential adjustment screw (81) and a limit block (82), a threaded sleeve (514) being provided on the upper portion of the lifting bracket (511), a reset opening being provided on the switch top plate (4), the threaded sleeve (514) passing through the reset opening, the pressure differential adjustment screw (81) being threadedly passed through the threaded sleeve (514), the lower end of the pressure differential adjustment screw (81) being abutted against the upper end of the limit block (82), the lower portion of the limit block (82) having two forks, the two forks being respectively fixedly connected to the lifting connection frame (52).

3. The dual-way pressure switch according to claim 2, characterized in that: The two-way pressure switch further comprises a reset adjustment component (9), wherein the reset adjustment component (9) comprises a pressure adjustment knob (91) and a pressure adjustment sleeve (92), and the pressure adjustment sleeve (92) is fixedly arranged above the reset port; The pressure regulating knob (91) comprises a screwing portion and a threaded sleeve, wherein the screwing portion is arranged outside the switch housing (3), the threaded sleeve is fixed at the lower end of the screwing portion, and the threaded sleeve is threaded into the pressure regulating sleeve (92); The elastic compression member (53) is a spring in a compression state, and a reset cavity is provided in the pressure regulating knob (91). The spring is slidably sleeved in the reset cavity, and the upper end of the spring abuts against the top inner wall of the twisting part, and the lower end of the spring abuts against the upper end of the threaded sleeve (514).

4. The dual-way pressure switch according to claim 1, characterized in that: A limiting bolt (64) is provided through the upper end of the jumping member (61), a fixed cavity is provided inside the jumping member (61), a limiting nut (65) is fixed in the fixed cavity, the nut of the limiting bolt (64) is used to press the moving contact piece (63), and the screw of the limiting bolt (64) is screwed to the limiting nut (65).

5. The dual-way pressure switch according to claim 4, characterized in that: The lower end surface of the switch top plate (4) is provided with a pair of upper limit limit portions (42), and the upper end surface of the base (2) is provided with a pair of lower limit limit portions (22); When the jumping member (61) abuts against the lower limit portion (22), the moving contact (631) and the static contact (411) are separated; when the nut of the limiting bolt (64) abuts against the upper limit portion (42), the moving contact (631) and the static contact (411) are in contact.

6. The dual-way pressure switch according to claim 1, characterized in that: A buffer spring (66) is provided between the movable contact piece (63) and the jumping member (61), and two ends of the buffer spring (66) respectively abut against the lower end surface of the movable contact piece (63) and the upper end surface of the jumping member (61).

7. The dual-way pressure switch according to claim 1, characterized in that: The sealing gasket (7) is made of a flexible sealing material, and the flexible sealing material includes rubber.

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