CN214672384U

CN214672384U - Sensing structure for proximity switch

Info

Publication number: CN214672384U
Application number: CN202120694914.8U
Authority: CN
Inventors: 李金龙; 殷宪响; 陈为信; 李义民; 郝继林; 李茂辉
Original assignee: Jiangsu Datun Power Engineering Co ltd
Current assignee: Jiangsu Datun Power Engineering Co ltd
Priority date: 2021-04-06
Filing date: 2021-04-06
Publication date: 2021-11-09
Anticipated expiration: 2031-04-06

Abstract

The utility model provides an induction structure for proximity switch, including mechanical swing arm, return structure, proximity switch, induction ring, support and piston rod for installing proximity switch, proximity switch fixed mounting in the upper portion of support, mechanical swing arm with the support parallel arrangement, and through the return structure with the support connection, the proximity switch top with mechanical swing arm between be set for gappedly; the piston rod is located mechanical swing arm's below, the induction ring cover the piston rod on, the induction ring can contact mechanical swing arm, greatly reduced proximity switch's loss ratio, promoted the stability of thick matter pump operation, ensured the stable operation of coal slime workshop production, indirectly guaranteed vaporizing device's steady operation and environmental protection index.

Description

Sensing structure for proximity switch

Technical Field

The utility model relates to an respond to the structure, specifically a response structure for proximity switch.

Background

The proximity switch, also called a non-contact sensor, is widely applied to the field of industrial automation, when an object to be detected approaches the proximity switch and reaches the sensing distance of the proximity switch, a high-level or low-level signal can be provided, and the detected object is sometimes in a severe environment, which easily causes the service life reduction of the proximity switch; in addition, when the mechanical positioning precision is not high, the proximity switch is easily damaged when the object to be tested and the proximity switch are accidentally collided.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides an respond to structure for proximity switch can prolong the proximity switch life-span, is difficult to damage when bumping.

The utility model provides an induction structure for proximity switch, including mechanical swing arm, return structure, proximity switch, induction ring, support and piston rod for installing proximity switch, proximity switch fixed mounting in the upper portion of support, mechanical swing arm with the support parallel arrangement, and through the return structure with the support is connected, the proximity switch top with mechanical swing arm between be set for gappedly; the piston rod is located below the mechanical swing arm, the induction ring is sleeved on the piston rod, and the induction ring can contact the mechanical swing arm.

Preferably, the return structure comprises a movable shaft, a return spring, a screw I and a screw II, the return spring is wrapped on the movable shaft, the support is connected with one end of the movable shaft through the screw I, and the mechanical swing arm is connected with the other end of the movable shaft through the screw II.

Preferably, the axial distance between the top end of the proximity switch and the mechanical swing arm is 2-6 mm.

Preferably, the axial distance between the top end of the proximity switch and the mechanical swing arm is 4 mm.

Preferably, the length of the induction ring contacting the mechanical swing arm is 3 mm-7 mm.

Preferably, the length of the induction ring capable of contacting the mechanical swing arm is 5 mm.

Preferably, the piston rod is perpendicular to the mechanical swing arm.

Compared with the prior art, the utility model discloses shift up proximity switch to the washing room top, thereby the requirement to waterproof corrosion resisting property has been reduced, proximity switch's fault rate has been reduced, the stability that proximity switch used has been promoted, improve the indirect response of proximity switch and arm by proximity switch and the direct response of induction ring with the response mode, make the inductive distance stable, thereby it leads to the switch to be hit and the problem of damage to have solved proximity switch and induction ring inductive distance unstability, proximity switch's fault rate has also been reduced, greatly reduced proximity switch's loss rate, the stability of concentrate pump operation has been promoted, the stable operation of coal slime workshop production has been ensured, vaporizing device's steady operation and environmental protection index have been guaranteed indirectly.

Drawings

FIG. 1 is a front view of the present invention;

fig. 2 is a left side view of the present invention;

FIG. 3 is a schematic structural diagram of a return structure;

reference numbers in the figures: 1. mechanical swing arm, 2, return structure, 3, proximity switch, 4, induction ring, 5, support, 6, piston rod, 21, loose axle, 22, return spring, 23, screw I, 24, screw II.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and embodiments.

Please refer to fig. 1 to 3 in combination, an inductive structure for a proximity switch includes a mechanical swing arm 1, a return structure 2, a proximity switch 3, an inductive ring 4, a bracket 5 and a piston rod 6, wherein the bracket 5 is fixedly installed above an observation window of a washing room, the proximity switch 3 is fixed with the top end of the bracket 5, the mechanical swing arm 1 is connected with the bracket 5 through the return structure 2, the inductive ring 4 is sleeved on a cylindrical piston rod 6, the piston rod 6 is fixed on a wall surface, and the piston rod 6 is located below the mechanical swing arm 1.

The return structure 2 comprises a movable shaft 21, a return spring 22, a screw I23 and a screw II 24, wherein the return spring 22 is wrapped on the movable shaft 21, the support 5 is connected with one end of the movable shaft 21 through the screw I23, the mechanical swing arm 1 is connected with the other end of the movable shaft 21 through the screw II 24, the return spring 22 enables the mechanical swing arm 1 to rebound to an initial position, in addition, the difference of use environments is considered, the screw I23 and the screw II 24 which can be conveniently disassembled are used for fixing the support 5 and the mechanical swing arm 1, the return spring 22 is installed between the support 5 and the mechanical swing arm 1, the installation position of the return spring 22 is adjusted according to the actual use environment condition, and the best use and induction effects are achieved.

The axial distance between the top end of the proximity switch 3 and the mechanical swing arm 1 is 2-6 mm, and in use, the best use effect is found when the axial distance between the top end of the proximity switch 3 and the mechanical swing arm 1 is 4 mm.

The length of the induction ring 4 which can contact the mechanical swing arm 1 is 3 mm-7 mm, and in use, the sensitivity is best when the length of the induction ring 4 which can contact the mechanical swing arm 1 is 5 mm.

The piston rod 6 and the mechanical swing arm 1 are vertical, when the induction ring 4 does not move to the lower part of the mechanical swing arm 1, the mechanical swing arm 1 does not move, the proximity switch 3 does not act, and the mechanical swing arm 1 is in an initial state (vertical).

The utility model adopts two PNP proximity switches 3 with phi 18mm and 24VDC power supply, the proximity switches 3 move up to the upper part of an observation window of a washing chamber, and a stainless steel bracket 5 is welded on a cover plate of the washing chamber, thus avoiding the proximity switches 3 from directly contacting with slurry in the washing chamber, and fundamentally solving the waterproof and anti-corrosion problems of the proximity switches 3, an iron mechanical swing arm 1 is arranged on the bracket 5 welded on the cover plate of the washing chamber, the mechanical swing arm 1 is arranged under the proximity switches 3, the lower end of the mechanical swing arm 1 exceeds a sensing ring 4 for 5mm, the axial distance of a sensing part of the proximity switches 3 is 4mm, the radial distance of the proximity switches 3 is 8mm, the mechanical swing arm 1 is fixed on the bracket 5 by a movable shaft 21 from bottom to top, a return spring 22 is arranged, a piston rod 6 drives the lower part of the mechanical swing arm 1 when moving, the upper part of the mechanical swing arm 1 can reversely move to a sensing area of the proximity switches 3, therefore, a trigger switch action signal is triggered to perform reversing action, the movement direction of the mechanical swing arm 1 is the radial action of the proximity switch 3, the axial distance between the mechanical swing arm 1 and the proximity switch 3 cannot be changed, the induction mode is stable and reliable, and the anti-collision problem of the proximity switch is solved.

The operating principle, when induction ring 4 does not move to mechanical swing arm 1 below, mechanical swing arm 1 does not take place the displacement, proximity switch 3 does not move, mechanical swing arm 1 is in initial condition (perpendicular), when the response, 4 remove to mechanical swing arm 1 below, when driving mechanical swing arm 1 and move left, there is a reverse displacement mechanical swing arm 1 upper end, when moving to proximity switch 3 induction zone, proximity switch 3 moves, send the switching-over signal, after proximity switch 3 moves and sends the switching-over signal, induction ring 4 takes place reverse displacement thereupon, mechanical swing arm 1 is rebounded to initial position by return spring 22, mechanical swing arm 1 upper end and proximity switch 3 separation, proximity switch 3 moves and resumes to initial condition, above-mentioned move as a cycle, so cycle is reciprocal, accomplish pumping operation.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.

Claims

1. A sensing structure for a proximity switch comprises a mechanical swing arm (1), a return structure (2), the proximity switch (3), a sensing ring (4), a bracket (5) for mounting the proximity switch (3) and a piston rod (6), and is characterized in that the proximity switch (3) is fixedly mounted at the upper part of the bracket (5), the mechanical swing arm (1) and the bracket (5) are arranged in parallel and connected with the bracket (5) through the return structure (2), and a gap is arranged between the top end of the proximity switch (3) and the mechanical swing arm (1); the piston rod (6) is located below the mechanical swing arm (1), the induction ring (4) is sleeved on the piston rod (6), and the induction ring (4) can contact the mechanical swing arm (1).

2. The sensing structure for the proximity switch according to claim 1, wherein the return structure (2) comprises a movable shaft (21), a return spring (22), a screw i (23) and a screw ii (24), the return spring (22) is wrapped on the movable shaft (21), the bracket (5) is connected with one end of the movable shaft (21) through the screw i (23), and the mechanical swing arm (1) is connected with the other end of the movable shaft (21) through the screw ii (24).

3. The induction structure for a proximity switch according to claim 1, characterized in that the axial distance between the top end of the proximity switch (3) and the mechanical swing arm (1) is 2 mm-6 mm.

4. The induction structure for a proximity switch according to claim 1 or 3, characterized in that the axial distance of the top end of the proximity switch (3) from the mechanical swing arm (1) is 4 mm.

5. The induction structure for a proximity switch according to claim 1, characterized in that the length of the induction ring (4) that can contact the mechanical swing arm (1) is 3 mm-7 mm.

6. The induction structure for a proximity switch according to claim 1 or 5, characterized in that the length of the induction loop (4) that can contact the mechanical swing arm (1) is 5 mm.

7. The induction structure for a proximity switch according to claim 1, characterized in that said piston rod (6) is perpendicular to the mechanical oscillating arm (1).