Novel pull-type sensor for weighing and garbage grab bucket crane

Abstract

The utility model relates to the technical field of hoisting machinery, in particular to a novel pull-type sensor for weighing and a garbage grab crane, and the novel pull-type sensor comprises a sensor elastic body and a junction box fixed on the sensor elastic body, the sensor elastic body comprises a top connecting part, a middle connecting part and a reversing connecting part which are integrally formed, the middle connecting part is of an S-shaped structure, symmetrical strain areas are arranged in the middle connecting part, strain gauges are installed in the strain areas, and the strain gauges are connected with the junction box. According to the utility model, an integrally formed structure is adopted, unreliable factors are reduced, the structural safety and reliability are improved, the strain area is arranged at the S-shaped structure of the middle connecting part with the same length and width as the section of the reversing connecting part, so that the stress area of the weakest turning part in the S-shaped middle of the middle connecting part is increased, the safety coefficient of the sensor is increased, and the structure is safer and more reliable; the pull-type sensor is high in precision and sensitivity, and the precision is generally about 0.03%.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting machinery, in particular to a new type pulling sensor for weighing with high precision and high sensitivity, and a garbage grab crane with the new type pulling sensor. Background Art

[0002] As living standards improve, domestic waste is accumulating. To efficiently and environmentally treat domestic waste, the construction of waste-to-energy plants has rapidly expanded in China in recent years. Garbage grab bridge cranes are increasingly being used in waste-to-energy plants. During this process, the production process requires automatic weighing and counting of the waste fed into each incinerator, along with the generation of various reports.

[0003] However, the existing garbage grab bridge crane has a single function and cannot achieve the accurate weighing function of the garbage. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a new type pulling sensor for weighing which has a simple structure, high precision, safety and reliability, and a garbage grab crane with the new type pulling sensor.

[0005] The utility model is achieved through the following technical solutions:

[0006] The utility model provides a novel tension sensor for weighing, comprising a sensor elastic body and a junction box fixed on the sensor elastic body;

[0007] The sensor elastomer includes an integrally formed top connecting part, an intermediate connecting part and a reversing connecting part. The intermediate connecting part is arranged between the top connecting part and the reversing connecting part. The intermediate connecting part is an S-shaped structure. A symmetrical strain area is arranged in the intermediate connecting part. A strain gauge is installed in the strain area. The strain gauge is connected to the junction box.

[0008] In order to facilitate the installation and disassembly of the new pull-type sensor, the top connecting part is a plate-like structure, and a first through hole is provided on the top connecting part that penetrates its wall thickness; the reversing connecting part is a U-shaped structure, and a second through hole is provided on both sides of the reversing connecting part that penetrates its wall thickness, and the axis of the second through hole is perpendicular to the axis of the first through hole.

[0009] In order to enable glue filling in the strain area and ensure its sealing, a third through hole that can communicate with the strain area is opened on the outer wall of the middle connecting part, and a cover plate is provided on the third through hole.

[0010] In order to facilitate the connection between the strain gauge and the junction box, a wiring hole connected to the strain area is opened on the outer wall of the middle connecting part.

[0011] The utility model also provides a garbage grab crane, comprising a balance arm and a grab bucket, wherein the novel pull-type sensor for weighing is arranged between the balance arm and the grab bucket.

[0012] In order to facilitate the installation and disassembly of the new pull-type sensor, the balance arm and the grab bucket, the balance arm and the top connection part of the new pull-type sensor are detachably connected through a first pin shaft, and the grab bucket and the reversing connection part are detachably connected through a second pin shaft.

[0013] The beneficial effects of the utility model are:

[0014] (1) The sensor elastic body of the utility model is an integrally formed structure consisting of a top connection part, an intermediate connection part, and a reversing connection part, which reduces unreliable factors and increases structural safety and reliability;

[0015] (2) The strain zone is set in the S-shaped structure of the middle connection part, which is equal in length and width to the cross section of the reversing connection part, so that the stress-bearing area of ​​the weakest turning part in the middle of the S-shaped middle connection part is increased, thereby increasing the safety factor of the sensor and making the structure safer and more reliable;

[0016] (3) The pull-type sensor is precise, sensitive and highly accurate, with an accuracy generally around 0.03%;

[0017] (4) Considering that the grab bucket will shake forward, backward, left, and right, the sensor elastic body is flexibly and detachably connected to the grab bucket and the balance arm through a pin shaft, a hexagonal slotted nut, and a cotter pin. The sensor can flexibly respond in the four directions of front, back, left, and right, ensuring that the force applied to the sensor is always consistent with the direction of the wire rope tension. The force applied to the sensor is the effective measured force.

[0018] (5) The sensor can be easily replaced or repaired using simple disassembly tools;

[0019] (6) The structure is changeable and can adapt to various connection methods of grab buckets and balance arms on site, which is highly practical;

[0020] (7) Adding a pull-type sensor between the grab bucket and the balance arm simplifies the structure and ensures that 100% of the lifted weight acts directly on the sensor. The force measurement method is reasonable, making the system's overall accuracy high;

[0021] (8) There is no need to change the structure of the grab bucket due to the installation of the weighing sensor, and the structure is more rational and easy to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a front view of a novel tension sensor for weighing according to the present utility model;

[0023] Figure 2It is a side view of the novel tension sensor for weighing of the utility model;

[0024] Figure 3 This is a front view of the sensor elastic body of the present utility model;

[0025] Figure 4 It is a side view of the sensor elastic body of the present invention;

[0026] Figure 5 This is a schematic diagram of the internal structure of the intermediate connecting part of the utility model;

[0027] Figure 6 This is a front view of the garbage grab crane of the present utility model;

[0028] Figure 7 It is a side view of the garbage grab crane of the present utility model. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0030] Example 1:

[0031] like Figure 1 、 Figure 2 A new type of pull-type sensor for weighing is shown, comprising a sensor elastomer 1 and a junction box 2 fixed to the side of the sensor elastomer 1. A first pin 3 is detachably provided at the top end of the sensor elastomer 1, and a second pin 4 is detachably provided at the bottom end of the sensor elastomer 1. The new type of pull-type sensor is installed and disassembled by means of the first pin 3 and the second pin 4.

[0032] Specifically, combined Figure 3-5As shown, the sensor elastomer includes an integrally formed top connecting portion 5, an intermediate connecting portion 6 and a reversing connecting portion 7. The top connecting portion 5 is a plate-like structure. A first through hole 8 is provided on the top connecting portion 5 that penetrates its wall thickness for mounting the first pin 3. The reversing connecting portion 7 is a U-shaped structure. Second through holes 9 are provided on both sides of the reversing connecting portion 7 that penetrate its wall thickness, and the axis of the second through hole 9 is perpendicular to the axis of the first through hole 8. The intermediate connecting portion 6 is arranged between the top connecting portion 5 and the reversing connecting portion 7. The intermediate connecting portion 6 is an S-shaped structure that can produce a slight deformation. A symmetrical strain relief is provided in the intermediate connecting portion 6. The strain zone 11 is provided with a strain gauge, which is electrically connected to the junction box 2. The outer wall of the intermediate connecting portion 6 is provided with a third through hole 10 that can connect to the strain zone 11. A cover plate is provided on the third through hole 10. The axis of the third through hole 10 is parallel to the axis of the first through hole 8. The outer wall of the intermediate connecting portion 6 is provided with a wiring hole 12 that connects to the strain zone 11. The strain gauge is a strain gauge with a full-bridge measurement circuit. After the full-bridge circuit of the sensor is connected, glue is poured into the third through hole 10 and the cover plate is covered. The connection line of the full-bridge measurement circuit passes through the wiring hole 12, and the sensor output line is led out from the junction box 2.

[0033] It should be noted that the top connecting portion 5 and the U-shaped reversing connecting portion 7 can be set in a 90° direction or in the same direction, or the top connecting portion 5 and the reversing connecting portion 7 are both U-shaped structures, and the U-shaped directions of the top connecting portion 5 and the reversing connecting portion 7 can be set in the same direction or in a 90° direction.

[0034] Example 2:

[0035] like Figure 6 、 Figure 7 The garbage grab crane shown includes a balance arm 13 and a grab bucket 15. A set of the above-mentioned new type pulling sensors 14 for weighing is arranged between the balance arm 13 and the grab bucket 15. The balance arm 13 and the top connecting part of the new type pulling sensor 14 are detachably connected by a first pin shaft, and the grab bucket 15 and the reversing connecting part are detachably connected by a second pin shaft.

[0036] When in use, the first pin shaft, hexagonal slotted nut and cotter pin are passed through the first through hole of the top connecting part and connected to the balance arm 13, and the second pin shaft, hexagonal slotted nut and cotter pin are passed through the second through hole of the reversing connecting part 7 and connected to the grab bucket 15; when the grab bucket grabs garbage, the real-time weight of the load will be applied to the middle connecting part of the new pull-type sensor 14 through the grab bucket 15 and the balance arm 13, causing the middle connecting part to produce a slight deformation, causing the strain zone of the sensor elastomer to produce a slight deformation and triggering an initial signal. The signal obtains the weight information carried by the equipment through the secondary instrument, and monitors the safety of production and operation.

[0037] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "between", "horizontal", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0038] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. A new type of tension sensor for weighing, characterized by: It includes a sensor elastic body and a junction box fixed on the sensor elastic body; The sensor elastomer includes an integrally formed top connecting part, an intermediate connecting part and a reversing connecting part. The intermediate connecting part is arranged between the top connecting part and the reversing connecting part. The intermediate connecting part is an S-shaped structure. A symmetrical strain area is arranged in the intermediate connecting part. A strain gauge is installed in the strain area. The strain gauge is connected to the junction box.

2. The novel tensile sensor for weighing according to claim 1, characterized in that: The top connecting portion is a plate-shaped structure, and a first through hole penetrating through the wall thickness of the top connecting portion is opened on the top connecting portion.

3. The novel tensile sensor for weighing according to claim 2, characterized in that: The reversing connection part is a U-shaped structure, and a second through hole penetrating the wall thickness is respectively opened on both sides of the reversing connection part, and the axis of the second through hole is perpendicular to the axis of the first through hole.

4. The novel tensile sensor for weighing according to claim 3, characterized in that: A third through hole capable of communicating with the strain zone is formed on the outer wall of the intermediate connecting portion, and a cover plate is provided on the third through hole.

5. The novel tensile sensor for weighing according to claim 4, characterized in that: The outer wall of the middle connecting portion is provided with a wiring hole communicating with the strain area.

6. A garbage grab crane, comprising a balance arm and a grab bucket, characterized in that: A new type of pulling sensor for weighing as described in any one of claims 1 to 5 is provided between the balancing arm and the grab bucket.

7. The garbage grab crane according to claim 6, characterized in that: The balancing arm and the top connecting portion of the novel pull-type sensor are detachably connected via a first pin shaft, and the grab bucket and the reversing connecting portion are detachably connected via a second pin shaft.

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