CN210467699U

CN210467699U - Fluid switch

Info

Publication number: CN210467699U
Application number: CN201921442491.XU
Authority: CN
Inventors: 王浩宇
Original assignee: Sunup Machinery Manufacture Co ltd
Current assignee: Sunup Machinery Manufacture Co ltd
Priority date: 2019-09-02
Filing date: 2019-09-02
Publication date: 2020-05-05
Anticipated expiration: 2029-09-02

Abstract

The utility model provides a fluid switch, this fluid switch include the cylinder body and stretch into to electrode in the cylinder body, be provided with the first piston that sets up in the cylinder body, be provided with the contact piece on the first piston, the one end of first piston is provided with wired elastic component. The utility model discloses an above-mentioned fluid switch can more accurate feedback fluid pressure signal.

Description

Fluid switch

Technical Field

The present invention relates to a switch, and more particularly, to a fluid switch capable of converting pressure generated by gas or liquid into an electrical signal.

Background

Along with the scientific and technological progress, in order to liberate manpower, raise the efficiency, mechanical equipment's degree of automation is higher and higher, and it is necessary for mechanical equipment to set up automatic switch. The fluid switch comprises a gas-electricity conversion switch which converts gas pressure into an electric signal and a liquid-electricity conversion switch which converts liquid pressure into the electric signal, and the gas-electricity conversion switch is taken as an example and has important significance for stabilizing the working pressure of the air pressure system and monitoring the working stability of the air pressure system. Common gas-electric change-over switches include adjustable diaphragm type, air pressure action rubber diaphragm pushing spring lever bridge type, etc.

Chinese patent CN 2487096Y's utility model discloses a pneumatic switch, this pneumatic switch, have the cavity of constituteing by the combination of the peripheral plane of last cavity that the through-hole has at a lower cavity that has the air inlet and a top, extrude the sealed cushion of elasticity at its faying face, this sealed cushion is sealed the isolation with the cavity and is two upper and lower cavities, fixed switch seat in the through-hole of last cavity, two electrodes are being fixed at switch seat top horizontal interval, be the piston under the electrode, the bottom surface and the sealed cushion contact of piston, by the inflation of sealed cushion and the closing of shrink control switch.

The pneumatic switch controls the switch by utilizing the expansion of the sealing rubber gasket, but the precision is not high when the pneumatic switch feeds back the air pressure value because the expansion degree of the sealing rubber gasket and the pressure magnitude are in a nonlinear relation.

Disclosure of Invention

The to-be-solved technical problem of the utility model is to the aforesaid is not enough to provide a fluid switch that can more accurate feedback fluid pressure signal.

The utility model provides a technical scheme of above-mentioned technical problem lies in, provides a fluid switch, include the cylinder body and stretch into extremely electrode in the cylinder body, be provided with the first piston that sets up in the cylinder body, be provided with the contact spare on the first piston, the one end of first piston is provided with wired elastic component.

As a further optimization of the present invention, the linear elastic assembly is arranged in the first piston lower end.

As a further optimization of the utility model, the cylinder body top is provided with first plug screw, be provided with first fluid entry on the first plug screw, first plug screw be provided with in the axis direction with first fluid entry matched with passageway, first piston set up in the below of first plug screw.

As the utility model discloses a further optimization, the cylinder body bottom is provided with the second plug screw, the second plug screw lateral part is provided with the scale groove, the electrode runs through the second plug screw.

As a further optimization of the utility model, the cylinder body bottom is provided with the third plug screw, the second plug screw run through in the third plug screw.

As a further optimization of the present invention, the linear elastic member is provided in the upper end of the first piston.

As a further optimization of the utility model, the cylinder body top is provided with the fourth plug screw, the fourth plug screw lateral part is provided with the scale groove, be provided with the fluid outlet on the fourth plug screw, the fourth plug screw be provided with in the axis direction with fluid outlet matched with through-hole.

As a further optimization of the present invention, the lower end of the contact piece is provided with a second piston, and the electrode runs through the second piston.

As a further optimization of the utility model, the cylinder body bottom is provided with the fifth plug screw, the second piston an organic whole set up in fifth plug screw upper portion, the electrode runs through the fifth plug screw.

As a further optimization of the present invention, the fifth screw plug is located at a position outside the cylinder body, and a second fluid inlet is provided, the second fluid inlet and a cavity located inside the cylinder body, the fourth screw plug and the cavity between the second pistons are provided with a space allowing fluid to pass through.

The technical effects of the utility model are that:

the fluid switch provided by the utility model pushes the piston to compress the linear elastic component under the action of the fluid pressure, so that the linear elastic component deforms, when the pressure value reaches a preset value, the deformation amount of the linear elastic component reaches the preset value, the contact piece arranged below the piston is contacted with or separated from the electrode, and the fluid switch is closed or opened; when the fluid pressure is lower than the preset value, the linear elastic component pushes the piston to reset, the contact piece is separated from or contacted with the electrode, and the fluid switch restores to the initial state. Since the deformation of the linear elastic component conforms to the formula of hooke's law: f is K X (F is the pressure value born by the linear elastic component, K is the stiffness coefficient of an object, is related to the property of the material, and is a constant, and X is the deformation quantity of the linear elastic component), so the deformation quantity of the linear elastic component is linearly related to the pressure value, and the fluid switch using the linear elastic component can more accurately feed back the preset pressure value to open or close the switch in time.

Drawings

Fig. 1 is a schematic view of a fluid switch according to a first embodiment of the present invention;

fig. 2 is a schematic diagram of a fluid switch according to a second embodiment of the present invention.

Description of reference numerals:

1-a first fluid inlet; 2-a first plug screw; 3-a first seal; 4-a first piston; 5-a contact member; 6-a linear elastic component; 7-cylinder body; 8-a second plug screw; 9-an electrode; 10-a third plug screw; 11-a fourth plug screw; 12-a fifth plug screw; 13-a second fluid inlet; 14-a second seal; 15-a second piston; 16-fluid outlet.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.

Referring to fig. 1, the fluid switch according to the first embodiment of the present invention includes a cylinder 7 and an electrode 9 extending into the cylinder 7, a first piston 4 disposed in the cylinder 7 is disposed in the cylinder 7, a contact member 5 is disposed on the first piston 4, a linear elastic component 6 is disposed at one end of the first piston 4, and the first piston 4 can drive the contact member 5 to reciprocate in the cylinder 7 under the action of fluid pressure and pressure of the linear elastic component.

The linear elastic component 6 is arranged at the lower end of the first piston 4, the first piston 4 is pushed to compress the linear elastic component 6 under the action of fluid pressure until the contact piece 5 on the first piston 4 is contacted with the electrode 9, in the process, the linear elastic component 6 deforms, when the fluid pressure value reaches a preset value, the deformation amount of the linear elastic component 6 reaches a preset value, the contact piece 5 arranged below the first piston 4 is contacted with the electrode 9, and the fluid switch is closed; when the fluid pressure is lower than the preset value, the linear elastic component 6 pushes the first piston 4 to reset, the contact point component 5 is separated from the electrode 9, and the fluid switch restores to the initial state. Since the amount of deformation of the linear elastic element 6 complies with the formula of hooke's law: f is K X (F is the pressure value born by the linear elastic component, K is the stiffness coefficient of the object, is related to the property of the material, and is a constant, and X is the deformation quantity of the linear elastic component), so that the preset pressure value can be fed back more accurately, and the switch can be opened or closed in time.

The top of the cylinder 7 is provided with a first plug screw 2, the first plug screw 2 is provided with a first fluid inlet 1, the first plug screw 2 is provided with a channel matched with the first fluid inlet 1 in the axial direction, a first piston 4 is arranged below the first plug screw 2, and preferably, the first piston 4 is sealed with the first plug screw 2 through a first sealing element 3. By this arrangement it is achieved that fluid entering from the first fluid inlet 1 can enter the cylinder 7 and thereby drive the movement of the first piston 4.

In the above, the contact member 5 may be fixed on the first piston 4 by embedding, bonding or screwing, and is not in contact with the cylinder 7, and preferably, the contact member 5 may be made of silver or copper, and may be determined according to the operating current and the operating frequency.

The cylinder 7 is provided at the bottom with a second plug screw 8, the second plug screw 8 is preferably made of insulating material, and the side surface is provided with a scale groove for adjusting a predetermined fluid pressure value. The electrode 9 penetrates through the second plug screw 8, the combination mode of the second plug screw 8 and the electrode 9 adopts a close fit mode or a pre-buried injection molding mode and the like, and preferably, the electrode 9 is a copper column or a rectangular copper strip.

The bottom of the cylinder 7 is provided with a third plug 10, the second plug 8 penetrates the third plug 10 and can move in the third plug 10 along the axial direction of the cylinder 7, and the third plug 10 is used for limiting the moving range of the linear elastic component 6.

When the pressure value of the fluid entering the cylinder 7 from the first fluid inlet 1 reaches a preset value, the first piston 4 pushes the lower compression linear elastic assembly 6 under the action of the fluid pressure, the contact piece 5 arranged at the lower part of the first piston 4 is contacted with the electrode 9, and the fluid switch is switched from a normally open state to a closed state; when the pressure value of the fluid entering the cylinder 7 from the first fluid inlet 1 is lower than the preset value, the first piston 4 is reset under the push of the linear elastic component 6, the contact point member 5 is separated from the electrode 9, and the novel fluid switch is switched to the opening state.

Referring to fig. 2, the fluid switch according to the second embodiment of the present invention: the fluid switch comprises a cylinder body 7 and an electrode 9 extending into the cylinder body 7, wherein a first piston 4 arranged in the cylinder body 7 is arranged in the cylinder body 7, a contact piece 5 is arranged on the first piston 4, a linear elastic assembly 6 is arranged at one end of the first piston 4, and the first piston 4 can drive the contact piece 5 to reciprocate in the cylinder body 7 under the action of fluid pressure and the pressure of the linear elastic assembly.

The linear elastic component 6 is arranged at the upper end of the first piston 4, the first piston 4 compresses the linear elastic component 6 under the pushing of the fluid pressure, the contact piece 5 on the first piston 4 is separated from the electrode 9, in the process, the linear elastic component 6 deforms, when the fluid pressure value reaches a preset value, the deformation amount of the linear elastic component 6 reaches the preset value, the contact piece 5 arranged below the first piston 4 is separated from the electrode 9, and the fluid switch is switched on; when the fluid pressure is lower than the preset value, the linear elastic component 6 pushes the first piston 4 to reset, the contact point component 5 is contacted with the electrode 9, and the fluid switch restores the initial state. Since the amount of deformation of the linear elastic element 6 complies with the formula of hooke's law: f is K X (F is the pressure value born by the linear elastic component, K is the stiffness coefficient of the object and is a constant, and X is the deformation quantity of the linear elastic component), so that the preset pressure value can be fed back more accurately, and the switch can be opened or closed in time.

The top of the cylinder 7 is provided with a fourth plug screw 11, a scale groove is formed on the side surface of the fourth plug screw 11 and is used for adjusting the position of the linear elastic component 6 in the cylinder 7 so as to adjust a preset pressure value, the fourth plug screw 11 is provided with a fluid outlet 16, and the fourth plug screw 11 is provided with a through hole matched with the fluid outlet 16 in the axial direction and is used for balancing the pressure of the internal space of the cylinder in which the linear elastic component 6 is positioned and the external environment.

The contact piece 5 is arranged at the lower part of the first piston 4, the contact piece 5 can be fixed on the first piston 4 by embedding, bonding or using screws and the like, and the contact piece 5 can not contact with the cylinder 7, preferably, the contact piece 5 can be made of silver or copper, and can be determined according to the working current and the action frequency; the contact member 5 is provided at its lower end with a second piston 15, and the electrode 9 extends through the second piston 15, preferably the second piston 15 is used in cooperation with the second sealing member 14.

A fifth screw plug 12 is provided at the bottom of the cylinder 7, and the second piston 15 is integrally provided at the upper part of the fifth screw plug 12; the electrode 9 penetrates through the fifth screw plug 12, the combination mode of the fifth screw plug 12 and the electrode 9 adopts a close fit mode or a pre-buried injection molding mode and the like, and preferably, the electrode 9 is a copper column or a rectangular copper strip.

The fifth screw 12 is provided with a second fluid inlet 13 at a position outside the cylinder 7, so that fluid can enter from the second fluid inlet 13 into the cavity between the fourth screw 11 and the second piston 15 inside the cylinder 7.

When the pressure of the fluid entering the cylinder 7 through the second fluid inlet 13 reaches a preset value, the first piston 4 moves upwards under the pushing of the fluid pressure, the first piston 4 compresses the linear elastic assembly 6, and the contact piece 5 is separated from the electrode 9, so that the fluid switch is switched from a closed state to an open state; when the pressure value in the cylinder 7 is lower than the set value, the linear elastic component 6 pushes the first piston 4 to reset, and the fluid switch is closed.

Fluid switch both applicable in pneumatic control system, also can be applicable to hydraulic control system, with above-mentioned first fluid entry 1,

second fluid entry

13, 14 replacement of fluid outlet for hydraulic pressure pipeline joint, first sealing member 3, the sealed 14 replacement of second are high pressure seal spare, can be used for hydraulic system, realize same function, have important meaning to the stability of stabilizing hydraulic system's operating pressure and control hydraulic system work.

The structure, features and effects of the present invention have been described in detail above according to the embodiment shown in the drawings, and the above description is only the preferred embodiment of the present invention, but the present invention is not limited to the implementation scope shown in the drawings, and all changes made according to the idea of the present invention or equivalent embodiments modified to the same changes should be considered within the protection scope of the present invention when not exceeding the spirit covered by the description and drawings.

Claims

1. A fluid switch, characterized by: including cylinder body (7) and stretch into to electrode (9) in cylinder body (7), be provided with in cylinder body (7) and set up first piston (4) in cylinder body (7), be provided with contact spare (5) on first piston (4), the one end of first piston (4) is provided with wired elastic component (6).

2. The fluid switch of claim 1, wherein: the linear elastic component (6) is arranged at the lower end of the first piston (4).

3. The fluid switch of claim 1, wherein: the cylinder body (7) top is provided with first plug screw (2), be provided with first fluid entry (1) on first plug screw (2), first plug screw (2) be provided with in the axis direction with first fluid entry (1) matched with passageway, first piston (4) set up in the below of first plug screw (2).

4. The fluid switch of claim 1, wherein: the bottom of the cylinder body (7) is provided with a second screw plug (8), the side part of the second screw plug (8) is provided with a scale groove, and the electrode (9) penetrates through the second screw plug (8).

5. The fluid switch of claim 4, wherein: the bottom of the cylinder body (7) is provided with a third plug screw (10), and the second plug screw (8) penetrates through the third plug screw (10).

6. The fluid switch of claim 1, wherein: the linear elastic component (6) is arranged at the upper end of the first piston (4).

7. The fluid switch of claim 1, wherein: the cylinder body (7) top is provided with fourth plug screw (11), fourth plug screw (11) lateral part is provided with the scale groove, be provided with fluid outlet (16) on fourth plug screw (11), fourth plug screw (11) be provided with in the axis direction with fluid outlet (16) matched with through-hole.

8. The fluid switch of claim 7, wherein: the lower end of the contact piece (5) is provided with a second piston (15), and the electrode (9) penetrates through the second piston (15).

9. The fluid switch of claim 8, wherein: the bottom of the cylinder body (7) is provided with a fifth screw plug (12), the second piston (15) is integrally arranged at the upper part of the fifth screw plug (12), and the electrode (9) penetrates through the fifth screw plug (12).

10. The fluid switch of claim 9, wherein: the position of the fifth screw plug (12) outside the cylinder body (7) is provided with a second fluid inlet (13), and a space allowing fluid to flow is arranged between the second fluid inlet (13) and the cavity between the fourth screw plug (11) and the second piston (15) inside the cylinder body (7).