Loading assembly, limiting device and crown block

Abstract

The utility model discloses a loading assembly, a limiting device and a crown block, and relates to the technical field of crown block control, the loading assembly is used for loading the limiting device of the crown block, the loading assembly is arranged at the safety height critical position of the crown block, the loading assembly comprises two heavy hammers and a connecting piece, and the two loading blocks are flexibly connected through the connecting piece. Compared with the prior art, the two heavy hammers are arranged and are flexibly connected through the connecting piece, so that compared with the prior art, the loading weight is increased, meanwhile, vibration caused by the steel wire rope is buffered through the connecting piece, the sensitivity of misoperation of the heavy hammers due to vibration is greatly reduced, and the situation that limiting flashes due to shaking of the heavy hammers is effectively reduced.

Description

Technical Field

[0001] The present application belongs to the technical field of overhead crane control, and specifically relates to a load-bearing assembly, a limiting device and an overhead crane. Background Art

[0002] Bridge cranes (hereinafter referred to as overhead cranes) are widely used in indoor and outdoor warehouses, factories, docks and open-air storage yards to lift materials without being hindered by ground equipment. In order to ensure the safe operation of overhead cranes, they are usually equipped with a weight limit device. Existing overhead cranes are prone to shaking when lifting heavy goods, causing the hook of the overhead crane to transmit vibration to the weight through the wire rope, causing the weight to shake and then cause the limit to break, resulting in power failure of the overhead crane, which has a great impact on the production rhythm. Summary of the invention

[0003] The purpose of the present application is to provide a load-bearing assembly, a limit device and an overhead crane, aiming to at least to a certain extent solve the technical problem of the limit being broken due to the swing of the heavy hammer.

[0004] In order to solve the above technical problems, this application adopts the following technical solutions:

[0005] A first aspect of an embodiment of the present application provides a load-bearing assembly for loading a limit device of an overhead crane, wherein the load-bearing assembly is arranged at a critical safety height position of the overhead crane, and the load-bearing assembly includes two weights and a connecting piece, and the two weights are flexibly connected via the connecting piece.

[0006] In some embodiments, the weight includes a load block and at least one hook, the hook is fixed on the weight, and each of the weights is connected to the connecting member via the hook.

[0007] In some embodiments, the load block is rectangular and has rounded corners on its outer edges.

[0008] In some embodiments, the connecting member is a chain.

[0009] In some embodiments, the load block is made of alloy steel.

[0010] In some embodiments, the outer side of the load block is wrapped with a protective layer.

[0011] In some embodiments, the protective layer is made of plastic.

[0012] In some embodiments, two weights are provided.

[0013] A second aspect of an embodiment of the present application provides a limit device for limiting the operation of an overhead crane, wherein the limit device is provided with the load-bearing assembly, and the limit device further comprises: a limit switch, which is provided at the upper end of the overhead crane; a wire rope, wherein the connecting member is connected to the limit switch via the wire rope, and when the wire rope is kept taut under the gravity of a weight, the rising contactor control circuit in the limit switch is closed; when the hook of the overhead crane rises to lift the weight and relax the wire rope, the rising contactor control circuit in the limit switch is disconnected.

[0014] A third aspect of the embodiments of the present application provides an overhead travelling crane, on which the above-mentioned limiting device is provided.

[0015] It can be seen from the above technical solution that the present application has at least the following advantages and positive effects:

[0016] A load-bearing assembly in the present application, by providing two weights and flexibly connecting them through a connecting piece, not only increases the load weight compared to the prior art, but also buffers the vibration caused by the wire rope through the connecting piece, greatly reducing the sensitivity of the weight to malfunction due to vibration, and effectively reducing the shaking of the weight and the resulting flash of the limit.

[0017] A limit device in the present application, by setting two weights and flexibly connecting them through a connecting piece, not only increases the load weight compared to the prior art, but also buffers the vibration caused by the wire rope through the connecting piece, greatly reducing the sensitivity of the weight to malfunction due to vibration, and effectively reducing the situation where the weight shakes and causes the limit to break.

[0018] An overhead crane in the present application is equipped with two weights, which are flexibly connected by a connecting piece. Compared with the prior art, it not only increases the load weight, but also buffers the vibration caused by the wire rope through the connecting piece, greatly reducing the sensitivity of the weight to malfunction due to vibration, and effectively reducing the shaking of the weight and the resulting limit flash. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0020] Figure 1 is a structural schematic diagram of a load-bearing assembly in an embodiment of the present application;

[0021] Figure 2 It is a structural schematic diagram of a limiting device in an embodiment of the present application.

[0022] The reference numerals are as follows: 100, weight; 110, load block; 120, hook; 200, connector; 300, limit switch; 400, wire rope. DETAILED DESCRIPTION

[0023] In order to make the technical personnel in the technical field to which the present application belongs to understand the present application more clearly, the technical scheme in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0024] This embodiment is mainly aimed at a 360T overhead crane for lifting liquid metal. During the use of the overhead crane, when the main plate hook descends to lift the ladle, the wire rope vibrates at the moment the plate hook tip touches the ladle ear axis, and the plate hook transmits the vibration to the weight through the wire rope, causing the weight to swing and limit the flash, thereby causing the overhead crane to lose power. The time interval for powering on again after each power outage is 5 minutes, which has a great impact on the overall production rhythm of the steelmaking workshop.

[0025] Figure 1 is a structural schematic diagram of a load-bearing assembly in an embodiment of the present application, such as Figure 1 As shown, a load-bearing assembly is used to load the limit device of the overhead crane. The load-bearing assembly is arranged at the critical position of the safety height of the overhead crane. The load-bearing assembly includes two weights 100 and a connector 200. The two weights 100 are flexibly connected by the connector 200. By setting two weights 100 and flexibly connecting them by the connector 200, compared with the prior art, not only the load weight is increased, but also the connector 200 plays a buffering role on the vibration caused by the wire rope 400, which greatly reduces the sensitivity of the weight 100 to malfunction due to vibration, and effectively reduces the situation where the weight 100 shakes and causes the limit to break.

[0026] In some embodiments, the weight 100 includes a load block 110 and at least one hook 120 , the hook 120 is fixed to the weight 100 , and each of the weights 100 is connected to the connector 200 via the hook 120 .

[0027] In some embodiments, the load block 110 is rectangular, and the outer edge of the load block 110 is provided with rounded corners. The elements are provided to prevent the corners of the load block 110 from cutting the wire rope 400.

[0028] In some embodiments, the connecting member 200 is a chain. In other embodiments, the connecting member 200 can also be a steel rope or other flexible connecting components.

[0029] In some embodiments, the load block 110 is made of alloy steel and is strong and durable.

[0030] In some embodiments, the outer side of the load block 110 is wrapped with a protective layer, and the protective layer is made of plastic. The protective layer protects the outer edge of the load block 110 and reduces the rigid collision caused by the collision.

[0031] In some embodiments, two weights 100 are provided.

[0032] See also Figure 2 , Figure 2 It is a structural schematic diagram of a limiting device in an embodiment of the present application.

[0033] A second aspect of the embodiments of the present application provides a limit device for limiting the operation of an overhead crane, wherein the limit device is provided with the load-bearing assembly, and the limit device further comprises: a limit switch 300, which is provided at the upper end of the overhead crane; a wire rope 400, wherein the connecting member 200 is connected to the limit switch 300 via the wire rope 400, and when the wire rope 400 is kept taut under the gravity of the weight 100, the rising contactor control circuit in the limit switch 300 is closed; when the hook of the overhead crane rises to lift the weight 100 and relaxes the wire rope 400, the rising contactor control circuit in the limit switch 300 is disconnected.

[0034] The third aspect of the embodiment of the present application provides an overhead crane, on which the above-mentioned limit device is provided. By providing two weights 100 and flexibly connecting them through a connector 200, compared with the prior art, not only the load weight is increased, but also the connector 200 has a buffering effect on the vibration caused by the wire rope 400, which greatly reduces the sensitivity of the weight 100 to malfunction due to vibration, and effectively reduces the situation where the weight 100 shakes and causes the limit to break.

[0035] In this embodiment, after adopting the heavy hammer assembly in this embodiment, the power failure situation of the squatting hooks of 8 overhead cranes is significantly improved, basically achieving zero failure, improving the reliability and stability of the overhead crane system operation, avoiding the tight production rhythm caused by failures, and greatly reducing the economic losses caused to the production process.

[0036] It can be seen from the above technical solution that the present application has at least the following advantages and positive effects:

[0037] A load-bearing assembly in the present application, by providing two weights and flexibly connecting them through a connecting piece, not only increases the load weight compared to the prior art, but also buffers the vibration caused by the wire rope through the connecting piece, greatly reducing the sensitivity of the weight to malfunction due to vibration, and effectively reducing the shaking of the weight and the resulting flash of the limit.

[0038] A limit device in the present application, by setting two weights and flexibly connecting them through a connecting piece, not only increases the load weight compared to the prior art, but also buffers the vibration caused by the wire rope through the connecting piece, greatly reducing the sensitivity of the weight to malfunction due to vibration, and effectively reducing the situation where the weight shakes and causes the limit to break.

[0039] An overhead crane in the present application is equipped with two weights, which are flexibly connected by a connecting piece. Compared with the prior art, it not only increases the load weight, but also buffers the vibration caused by the wire rope through the connecting piece, greatly reducing the sensitivity of the weight to malfunction due to vibration, and effectively reducing the shaking of the weight and the resulting limit flash.

[0040] Unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0041] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise" and "counterclockwise" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0042] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0043] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0044] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A load-bearing assembly, used for carrying loads on a limit device of an overhead crane, characterized in that: The load-bearing assembly is arranged at a critical position of the safety height of the overhead crane, and the load-bearing assembly comprises two weights and a connecting piece, and the two weights are flexibly connected via the connecting piece.

2. The load-carrying assembly according to claim 1, characterized in that: The weight comprises a load block and at least one hook, the hook is fixed on the weight, and each of the weights is connected to the connecting member via the hook.

3. The load-carrying assembly according to claim 2, characterized in that: The load block is rectangular, and the outer edge of the load block is provided with rounded corners.

4. The load-carrying assembly according to claim 1, characterized in that: The connecting piece is a chain.

5. The load-carrying assembly according to claim 2, characterized in that: The load block is made of alloy steel.

6. The load-carrying assembly according to claim 2, characterized in that: The outer side of the load block is wrapped with a protective layer.

7. The load-carrying assembly according to claim 6, characterized in that: The protective layer is made of plastic.

8. The load-carrying assembly according to claim 1, characterized in that: The weights are provided with two.

9. A limiting device for limiting the operation of an overhead travelling crane, wherein the limiting device is provided with a load-bearing assembly as claimed in any one of claims 1 to 8, wherein: The limiting device also includes: The limit switch is installed on the upper end of the overhead crane; The connecting piece is connected to the limit switch through the wire rope. When the wire rope is kept taut under the gravity of the weight, the rising contactor control circuit in the limit switch is closed; when the hook of the crane rises to lift the weight to relax the wire rope, the rising contactor control circuit in the limit switch is disconnected.

10. An overhead crane, characterized in that: The overhead travelling crane is provided with a limiting device as claimed in claim 9.

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