CN217462736U

CN217462736U - External displacement sensor for hydraulic cylinder

Info

Publication number: CN217462736U
Application number: CN202221199667.5U
Authority: CN
Inventors: 杨昌强
Original assignee: Nanjing Iron and Steel Co Ltd
Current assignee: Nanjing Iron and Steel Co Ltd
Priority date: 2022-05-19
Filing date: 2022-05-19
Publication date: 2022-09-20
Anticipated expiration: 2032-05-19

Abstract

The utility model discloses an external displacement sensor for hydraulic cylinder, including pneumatic cylinder (1) and flexible end (1 a), pneumatic cylinder (1) is equipped with cylinder (2) rather than parallel outward, is equipped with matched with pipe (3) and magnetic ring (5) in cylinder (2), and the insertion end (4 a) of MTS sensor (4) stretches into in pipe (3); the magnetic ring (5) is connected with the pull rod (6), the pull rod (6) is connected with a first shaft shoulder screw (8) through a first joint bearing (7), and the first shaft shoulder screw (8) is connected with the telescopic end (1 a) through a screw connecting block (9); and a sensor protection cover (10) outside the MTS sensor (4) is connected with a second shaft shoulder screw (12) through a second joint bearing (11), and the second shaft shoulder screw (12) is fixedly connected with the hydraulic cylinder (1). The utility model has the advantages that satisfy and use under the abominable operating mode of high temperature, reliable and stable reduces spare part loss and maintenance cost, improves life, guarantees production time.

Description

External displacement sensor for hydraulic cylinder

Technical Field

The utility model relates to a pneumatic cylinder displacement detection equipment technical field especially relates to an external displacement sensor for pneumatic cylinder.

Background

At present, in general, the limit detection of the hydraulic cylinder adopts a traditional fixed limit detection element, and as a sensitive element is in a contact type, the sensor is abraded in the process of continuously repeating detection, the reliability of detection data is reduced, the service life of the sensor is shortened, and the problems of action errors, insensitive limit, abnormal detection distance and the like cannot be avoided; simultaneously, when the pneumatic cylinder was used under the abominable operating mode of high temperature, can cause certain harmful effects to fixed spacing detecting element's life and precision, in order to guarantee the accuracy that detects, need frequently adjust detecting element, waste time and energy.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the purpose is exactly in order to solve the problem that current fixed spacing detecting element easily wears and teares, the detection data reliability is low, life is short, provides an external displacement sensor for pneumatic cylinder, can satisfy and use under the abominable operating mode of high temperature, and reliable and stable, sensor action position set up the reliability height, reduce spare parts loss cost and maintenance cost, improve sensor life, guarantee production time.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an external displacement sensor for a hydraulic cylinder comprises the hydraulic cylinder and a telescopic end which are connected, wherein a cylinder barrel parallel to the hydraulic cylinder is arranged outside the hydraulic cylinder, a guide pipe coincident with the axis of the cylinder barrel is arranged in the cylinder barrel, one side of the cylinder barrel is connected with an MTS sensor, and the insertion end of the MTS sensor penetrates through the end part of the cylinder barrel and extends into the guide pipe;

the guide pipe is sleeved with a magnetic ring matched with the insertion end, the magnetic ring is connected with a pull rod, one end of the pull rod penetrates out of the cylinder barrel and is connected with a shaft shoulder screw through a joint bearing I, and the axis of the pull rod is also overlapped with the axis of the cylinder barrel;

the first shaft shoulder screw is vertically connected with the pull rod, and the lower end of the first shaft shoulder screw is connected with the telescopic end of the hydraulic cylinder through a screw connecting block so as to drive the pull rod and the magnetic ring to move in the cylinder barrel through the movement of the telescopic end, so that the movement distance of the hydraulic cylinder is judged by monitoring the displacement of the magnetic ring through a sensor;

a sensor protection cover is arranged outside the MTS sensor, one side of the sensor protection cover is connected with the cylinder barrel, the other side of the sensor protection cover is connected with a second shaft shoulder screw through a second joint bearing, and the second shaft shoulder screw is fixedly connected with the hydraulic cylinder through a screw connecting block.

Furthermore, a magnetic ring head end limit and a magnetic ring tail end limit are arranged in the cylinder barrel, and the movement displacement of the magnetic ring is between the magnetic ring head end limit and the magnetic ring tail end limit.

Further, the movement axis of the magnetic ring and the axis of the guide pipe are coincident with each other.

Furthermore, the axis of the sensor protection cover is also overlapped with the axis of the cylinder barrel, and the second shaft shoulder screw is perpendicular to the axis of the sensor protection cover.

Furthermore, the end of the cylinder barrel is provided with an end cover, and a limiting lantern ring is connected between the end cover and the pull rod.

Furtherly, the one end of MTS sensor stretches into in the cylinder, the other end links to each other with the sensor safety cover through an L type pole, and the one end that the sensor safety cover was worn out to L type pole is fixed through fastening head.

Compared with the prior art, the utility model discloses a technical scheme's advantage specifically lies in:

(1) the device of the utility model can be used under the severe working condition of high temperature, is stable and reliable, does not need to frequently adjust the detection element, and simultaneously realizes the action by directly setting the range limit in the sensor control program, thereby ensuring the reliability;

(2) the MTS displacement sensor accurately detects the position of the movable magnetic ring through a non-contact measurement and control technology, so that the actual displacement value of a detected product is measured, and the movable magnetic ring and the sensitive element which are used for determining the position are not in direct contact, so that the sensor is not easily affected by oil stain, solution, dust or other pollution;

(3) the utility model discloses a device can effectively replace original spacing detecting element, reduces spare part loss cost and maintenance cost, has guaranteed the effective activity duration in scene, has promoted control accuracy, is favorable to production and the operation become more meticulous.

Drawings

FIG. 1 is a schematic view of the assembly of the external displacement sensor for a hydraulic cylinder according to the present invention;

fig. 2 is the structural schematic diagram of the external displacement sensor for the hydraulic cylinder of the present invention.

Detailed Description

Example 1

In order to make the present invention more clearly understood, the following description is made with reference to the accompanying drawings, and the specific embodiments described herein are only used for explaining the present invention, and are not used for limiting the present invention.

Referring to fig. 1, the external displacement sensor for the hydraulic cylinder includes a hydraulic cylinder 1 and a telescopic end 1a connected to each other, and is characterized in that:

referring to fig. 1 and 2, a cylinder barrel 2 parallel to the hydraulic cylinder 1 is arranged outside the hydraulic cylinder 1, a guide pipe 3 coincident with the axis of the cylinder barrel 2 is arranged in the cylinder barrel 2, an MTS sensor 4 is connected to one side of the cylinder barrel 2, and an insertion end 4a of the MTS sensor 4 penetrates through the end of the cylinder barrel 2 and extends into the guide pipe 3;

a magnetic ring 5 matched with the insertion end 4a is sleeved on the guide pipe 3, the magnetic ring 5 is connected with a pull rod 6, a magnetic ring head end limit 13 and a magnetic ring tail end limit 14 are arranged in the cylinder barrel 2, the movement displacement of the magnetic ring 5 is between the magnetic ring head end limit 13 and the magnetic ring tail end limit 14, and the movement axis of the magnetic ring 5 is overlapped with the axis of the guide pipe 3;

an end cover 2a is arranged at the end part of the cylinder barrel 2, one end of a pull rod 6 penetrates out of the end cover 2a, a limiting lantern ring 15 is connected between the pull rod and the end cover 2a, the pull rod 6 is connected with a shaft shoulder screw I8 through a joint bearing I7, and the axis of the pull rod 6 and the axis of the cylinder barrel 2 are overlapped;

the first shaft shoulder screw 8 is vertically connected with the pull rod 6, and the lower end of the first shaft shoulder screw 8 is connected with the telescopic end 1a of the hydraulic cylinder 1 through a screw connecting block 9 so as to drive the pull rod and the magnetic ring to move in the cylinder barrel through the movement of the telescopic end, so that the moving distance of the hydraulic cylinder is judged by monitoring the displacement of the magnetic ring through a sensor;

a sensor protection cover 10 is arranged outside the MTS sensor 4, one end of the MTS sensor 4 extends into the cylinder barrel 2, the other end of the MTS sensor 4 is connected with the sensor protection cover 10 through an L-shaped rod 16, and one end, penetrating out of the sensor protection cover 10, of the L-shaped rod 16 is fixed through a fastening head 17;

one side of a sensor protection cover 10 is connected with the cylinder barrel 2, the other side of the sensor protection cover is connected with a second shaft shoulder screw 12 through a second joint bearing 11, and the second shaft shoulder screw 12 is fixedly connected with the hydraulic cylinder 1 through a screw connecting block;

the axis of the sensor protection cover 10 is also coincident with the axis of the cylinder barrel 2, and the second shoulder screw 12 is perpendicular to the axis of the sensor protection cover 10.

When the device is set, the size, the action position, the stroke and the like of the hydraulic cylinder on site can be checked firstly; selecting proper configuration of the auxiliary cylinder, MTS displacement sensor type selection and the like; and finally, field installation is carried out, and a limit action point is set to perfect control. During the use, fix this device between pneumatic cylinder 1 and flexible end 1a through the shaft shoulder screw, when flexible end 1a removed, can drive pull rod 6 translation together to drive the magnetic ring 5 in the cylinder 2 and remove along pipe 3, the insertion end 4a of MTS sensor 4 inserts in the pipe 3 for detect the displacement of magnetic ring 5, can learn the stroke of pneumatic cylinder 1 through measuring the displacement change of magnetic ring 5.

The utility model discloses a device has replaced original fixed detecting element, adopts external mode, and magnetic ring and sensing element can not direct contact simultaneously, have reduced the loss of spare part, can also satisfy and use under the abominable operating mode of high temperature, and reliable and stable need not frequently to adjust detecting element, and sensor action position sets up reliably.

In addition to the above embodiments, the present invention may have other embodiments. All the technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope claimed by the present invention.

Claims

1. The utility model provides an external displacement sensor for pneumatic cylinder, includes pneumatic cylinder (1) and flexible end (1 a) that link to each other, its characterized in that:

a cylinder barrel (2) parallel to the hydraulic cylinder (1) is arranged outside the hydraulic cylinder (1), a guide pipe (3) coincident with the axis of the cylinder barrel (2) is arranged in the cylinder barrel (2), an MTS sensor (4) is connected to one side of the cylinder barrel (2), and an insertion end (4 a) of the MTS sensor (4) penetrates through the end of the cylinder barrel (2) and extends into the guide pipe (3);

a magnetic ring (5) matched with the insertion end (4 a) is sleeved on the guide pipe (3), the magnetic ring (5) is connected with a pull rod (6), one end of the pull rod (6) penetrates out of the cylinder barrel (2) and is connected with a shaft shoulder screw I (8) through a joint bearing I (7), and the axis of the pull rod (6) is also overlapped with the axis of the cylinder barrel (2);

the first shaft shoulder screw (8) is vertically connected with the pull rod (6), and the lower end of the first shaft shoulder screw (8) is connected with the telescopic end (1 a) of the hydraulic cylinder (1) through a screw connecting block (9);

a sensor protection cover (10) is arranged outside the MTS sensor (4), one side of the sensor protection cover (10) is connected with the cylinder barrel (2), the other side of the sensor protection cover is connected with a second shaft shoulder screw (12) through a second joint bearing (11), and the second shaft shoulder screw (12) is fixedly connected with the hydraulic cylinder (1) through a screw connecting block.

2. The external displacement sensor for hydraulic cylinders according to claim 1, wherein:

a magnetic ring head end limit (13) and a magnetic ring tail end limit (14) are arranged in the cylinder barrel (2), and the movement displacement of the magnetic ring (5) is between the magnetic ring head end limit (13) and the magnetic ring tail end limit (14).

3. The external displacement sensor for the hydraulic cylinder according to claim 1 or 2, characterized in that:

the motion axis of the magnetic ring (5) is coincident with the axis of the catheter (3).

4. The external displacement sensor for the hydraulic cylinder according to claim 1 or 2, characterized in that:

the axis of the sensor protection cover (10) is also overlapped with the axis of the cylinder barrel (2), and the second shaft shoulder screw (12) is perpendicular to the axis of the sensor protection cover (10).

5. The external displacement sensor for the hydraulic cylinder according to claim 1 or 2, characterized in that:

the end of the cylinder barrel (2) is provided with an end cover (2 a), and a limiting lantern ring (15) is connected between the end cover (2 a) and the pull rod (6).

6. The external displacement sensor for the hydraulic cylinder according to claim 1 or 2, characterized in that:

one end of the MTS sensor (4) extends into the cylinder barrel (2), the other end of the MTS sensor is connected with the sensor protection cover (10) through an L-shaped rod (16), and one end, penetrating out of the sensor protection cover (10), of the L-shaped rod (16) is fixed through a fastening head (17).