Static magnetic grid gate stroke sensor

Abstract

The utility model relates to a static magnetic grid gate stroke sensor, which comprises a magnetic grid ruler, a magnetic head, a positioning structure and a buffer structure, the positioning structure comprises channel steel, first limiting parts and second limiting parts are sequentially formed on the inner side wall of the channel steel from inside to outside, a magnetic railing ruler is installed between the two first limiting parts, a magnetic head is installed between the two second limiting parts in a sliding mode, and an upper sealing plate and a lower sealing plate are arranged at the top and the bottom of the channel steel respectively to position the magnetic railing ruler. The buffer structure comprises a buffer box, a buffer cavity is formed in the buffer box, a buffer hole is formed in the bottom of the buffer cavity, a buffer block larger than the buffer hole is arranged in the buffer cavity, a plurality of springs are connected between the peripheral side of the buffer block and the side wall of the buffer box in the circumferential direction, and a connecting rod penetrating through the buffer hole is connected between the bottom of the buffer block and the magnetic head. A buffering gap exists between the connecting rod and the buffering hole. According to the static magnetic grid gate stroke sensor, the accuracy of a measurement result can be well ensured.

Description

Technical Field

[0001] The utility model relates to the field of sensors, in particular to a static magnetic grid gate travel sensor. Background Art

[0002] The original gate opening sensor is a magnetic grating sensor, which is a displacement sensor that uses the magnetic action of the magnetic scale and the magnetic head for measurement. In specific applications, the magnetic scale is fixed on the gate and the magnetic head is fixed on the gate frame, and the gate stroke is measured by the relative displacement change between the two. In actual application, the magnetic grating sensor still has the following problems: (1) During the operation of the gate, the gate will shake irregularly in the horizontal plane due to the influence of hydrodynamics, which will cause the gap between the magnetic scale and the magnetic head to change, affecting the accuracy of the measurement results. (2) The magnetic scale of some pumping stations, such as the Changgou Pumping Station, uses a stainless steel pipe as the grid base, and the static magnetic grid source (magnetic block) is fixed on the stainless steel pipe by an aluminum alloy block. However, since the magnetic block is installed exposed, it will be gradually corroded on the surface, increase the attachments, and weaken the magnetism of the magnetic block after being immersed in water for a long time, which will cause the gate opening data to drift, affecting the normal operation of the gate. Utility Model Content

[0003] In order to make up for the deficiencies of the prior art, the utility model provides a static magnetic grid gate travel sensor, which can better ensure the accuracy of the measurement result, so as to at least solve or alleviate a problem existing in the prior art.

[0004] The technical solution adopted by the utility model to solve the above technical problems is:

[0005] A static magnetic grid gate travel sensor, comprising a magnetic grid scale, a magnetic head, a positioning structure and a buffer structure;

[0006] The positioning structure comprises a channel steel, wherein the inner side wall of the channel steel is sequentially formed with a first limiting portion and a second limiting portion from the inside to the outside, a magnetic scale is installed between the two first limiting portions, and a magnetic head is slidably installed between the two second limiting portions, and an upper sealing plate and a lower sealing plate are respectively provided at the top and bottom of the channel steel to position the magnetic scale;

[0007] The buffer structure includes a buffer box, a buffer cavity is formed in the buffer box, a buffer hole is formed at the bottom of the buffer cavity, a buffer block larger than the buffer hole is provided in the buffer cavity, a plurality of springs are connected along the circumferential direction between the circumferential side of the buffer block and the side wall of the buffer box, a connecting rod penetrating the buffer hole is connected between the bottom of the buffer block and the magnetic head, and a buffer gap exists between the connecting rod and the buffer hole.

[0008] Furthermore, the magnetic scale comprises a stainless steel outer tube and an aluminum alloy inner tube, a magnetic block is embedded and installed on one side of the aluminum alloy inner tube facing the magnetic head, and both ends of the stainless steel outer tube are sealed by welding plates.

[0009] Furthermore, the magnetic block is fixed to the aluminum alloy inner tube by embedded screws.

[0010] Furthermore, the upper and lower parts of the channel steel are respectively provided with a plurality of slots along the length direction thereof, an upper sealing plate is inserted into a slot of the upper part, and a lower sealing plate is inserted into a slot of the lower part, so as to position the magnetic scale.

[0011] Furthermore, the first limiting portion is a first convex ridge formed integrally with the channel steel, and the second limiting portion is a second convex ridge formed integrally with the channel steel.

[0012] The utility model adopts the above technical solution, and has the advantages of:

[0013] 1. The static magnetic gate travel sensor accurately positions the magnetic scale and the magnetic head through the positioning structure, and buffers the gate shaking through the buffer structure to avoid damage to the positioning installation. In this way, a certain measurement gap between the magnetic scale and the magnetic head can be always maintained, thereby ensuring the accuracy of the measurement structure.

[0014] 2. The static magnetic gate travel sensor can better waterproof the magnetic block and avoid the corrosion of the magnetic block by improving the magnetic scale structure, so as to better adapt to the underwater environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the elevation structure of one embodiment of the utility model;

[0016] Figure 2 for Figure 1 A schematic diagram of a part of the structure from another angle;

[0017] Figure 3 is a cross-sectional view of 2;

[0018] Figure 4 for Figure 2 The enlarged structural diagram of the middle B part;

[0019] Figure 5 for Figure 1 A schematic diagram of the enlarged structure of the middle part A;

[0020] Figure 6 for Figure 3 Schematic diagram of the partial structure of the aluminum alloy inner tube;

[0021] Figure 7 A schematic diagram of the positioning structure of another embodiment of the utility model.

[0022] In the figure, 1, magnetic scale, 2, magnetic head, 3, positioning structure, 4, buffer structure;

[0023] 11. Stainless steel outer tube, 12. Aluminum alloy inner tube, 13. Magnetic block; 31. Channel steel, 32. First limiting portion, 33. Second limiting portion, 34. Upper sealing plate, 35. Lower sealing plate, 36. Slot; 41. Buffer box, 42. Buffer cavity, 43. Buffer hole, 44. Buffer block, 45. Spring, 46. Connecting rod. DETAILED DESCRIPTION

[0024] In order to clearly illustrate the technical features of the present solution, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings. In the description of this specification, the description of reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0025] like Figure 1-5 As shown, in this embodiment, the static magnetic gate travel sensor includes a magnetic scale 1, a magnetic head 2, a positioning structure 3 and a buffer structure 4;

[0026] The positioning structure 3 comprises a channel steel 31, and the inner side wall of the channel steel 31 is formed with a first limiting portion 32 and a second limiting portion 33 in sequence from the inside to the outside, the magnetic scale 1 is installed between the two first limiting portions 32, and the magnetic head 2 is slidably installed between the two second limiting portions 33, and the top and bottom of the channel steel are respectively provided with an upper sealing plate 34 and a lower sealing plate 35 to position the magnetic scale 1;

[0027] The buffer structure 4 includes a buffer box 41, a buffer cavity 42 is formed in the buffer box 41, a buffer hole 43 is formed at the bottom of the buffer cavity 42, a buffer block 44 larger than the buffer hole is provided in the buffer cavity 42, a plurality of springs 45 are connected along the circumferential direction between the circumferential side of the buffer block 44 and the side wall of the buffer box 41, a connecting rod 46 that passes through the buffer hole is connected between the bottom of the buffer block 44 and the magnetic head 2, and a buffer gap exists between the connecting rod 46 and the buffer hole 43.

[0028] like Figure 3 and Figure 6 As shown, in one embodiment, the magnetic scale 1 includes a stainless steel outer tube 11 and an aluminum alloy inner tube 12, a magnetic block 13 is embedded and installed on the side of the aluminum alloy inner tube 12 facing the magnetic head, and both ends of the stainless steel outer tube 11 are sealed by welding plates. The magnetic block 13 is fixed to the aluminum alloy inner tube 12 by embedded screws.

[0029] like Figure 7As shown, in one of the embodiments, the upper and lower parts of the channel steel 31 are respectively provided with a plurality of slots 36 along the length direction thereof, an upper sealing plate 34 is inserted into a slot in the upper part, and a lower sealing plate 35 is inserted into a slot in the lower part, so as to position the magnetic scale 1, and the plurality of slots can adjust the position of the magnetic scale, and further can be used to adjust the position of the magnetic block relative to the magnetic head.

[0030] like Figure 3 As shown, in one embodiment, the first limiting portion 32 is a first ridge formed integrally with the channel steel, and the second limiting portion 33 is a second ridge formed integrally with the channel steel.

[0031] The above-mentioned specific implementation manner cannot be used as a limitation on the protection scope of the present utility model. For those skilled in the art, any replacement, improvement or change made to the implementation manner of the present utility model falls within the protection scope of the present utility model.

[0032] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. A static magnetic gate travel sensor, characterized in that: It includes a magnetic scale, a magnetic head, a positioning structure and a buffer structure; The positioning structure comprises a channel steel, wherein the inner side wall of the channel steel is sequentially formed with a first limiting portion and a second limiting portion from the inside to the outside, a magnetic scale is installed between the two first limiting portions, and a magnetic head is slidably installed between the two second limiting portions, and an upper sealing plate and a lower sealing plate are respectively provided at the top and bottom of the channel steel to position the magnetic scale; The buffer structure includes a buffer box, a buffer cavity is formed in the buffer box, a buffer hole is formed at the bottom of the buffer cavity, a buffer block larger than the buffer hole is provided in the buffer cavity, a plurality of springs are connected along the circumferential direction between the circumferential side of the buffer block and the side wall of the buffer box, a connecting rod penetrating the buffer hole is connected between the bottom of the buffer block and the magnetic head, and a buffer gap exists between the connecting rod and the buffer hole.

2. The static magnetic gate travel sensor according to claim 1, characterized in that: The magnetic scale comprises a stainless steel outer tube and an aluminum alloy inner tube. A magnetic block is embedded and installed on one side of the aluminum alloy inner tube facing the magnetic head. Both ends of the stainless steel outer tube are sealed by welding plates.

3. The static magnetic gate travel sensor according to claim 2, characterized in that: The magnetic block is fixed to the aluminum alloy inner tube by embedded screws.

4. The static magnetic gate travel sensor according to claim 1, characterized in that: The upper and lower parts of the channel steel are respectively provided with a plurality of slots along the length direction thereof, an upper sealing plate is inserted into a slot of the upper part, and a lower sealing plate is inserted into a slot of the lower part, so as to position the magnetic scale.

5. The static magnetic gate travel sensor according to claim 1, characterized in that: The first limiting portion is a first convex ridge formed integrally with the channel steel, and the second limiting portion is a second convex ridge formed integrally with the channel steel.

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