Pre-tightening clamp for laminate binding machine and laminate binding machine

Abstract

The pre-tightening clamp comprises a support, a swing shaft, an oil cylinder, a piston rod, a connecting shaft, connecting rods, a rotating shaft, a swing rod, a pin shaft and a steel wire rope, the upper end of the oil cylinder is connected with the support, the upper end of the piston rod is inserted into the oil cylinder, and the lower end of the piston rod is hinged to the two connecting rods through the connecting shaft. The upper ends of the two swing rods are hinged to the support through swing shafts, the lower ends of the two connecting rods are hinged to the lower ends of the two swing rods through rotating shafts, one ends of the two steel wire ropes are connected with the lower ends of the two swing rods through pin shafts, a first reinforcing rod is arranged at the upper end of the left swing rod, and a second reinforcing rod is arranged at the upper end of the right swing rod. The third reinforcing rod is arranged between the first reinforcing rod and the second reinforcing rod, the two ends of the third reinforcing rod are hinged to the first reinforcing rod and the second reinforcing rod respectively, and by additionally arranging the first reinforcing rod, the second reinforcing rod and the third reinforcing rod, the phenomenon that an oil cylinder is bent in the working process of the pre-tightening clamp is effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of petrochemical equipment, in particular to a pre-tightening clamp for a laminate wrapping machine and the laminate wrapping machine. Background Technique

[0002] For large pressure vessels, especially reaction vessels required to work under conditions such as high temperature, high pressure and strong corrosive media, due to high pressure and strong corrosive media, to ensure the safety of the vessel, the wall thickness of the vessel is designed to be very thick, and the material is a highly alloyed material with corrosion resistance. This not only makes processing and production difficult, and in some cases even impossible to manufacture, but also the price is very high. For such vessels, generally a multi-layer wrapping method is adopted, that is, a common carbon alloy steel is first used to make an inner cylinder, a corrosion-resistant lining is heat-sleeved or inlaid on the inner wall of the inner cylinder, and ordinary carbon steel plates are wrapped layer by layer outside the inner cylinder until the designed thickness is reached. This not only has a simple manufacturing process and low cost, but also under the operating pressure, the internal stress generated by the outer multi-layer wrapping of the inner cylinder cancels out the tensile stress caused by the internal pressure, and even becomes a compressive stress instead, reducing the possibility of stress corrosion. Typical products include urea synthesis towers, ammonia synthesis towers, etc.

[0003] There are two types of wrapping machines for multi-layer wrapped metal pressure vessels (hereinafter referred to as wrapping machines): fixed gantry type and single-column mobile type. The fixed gantry type wrapping machine has a large structure and cannot be moved, which is not conducive to the overall wrapping of long cylinders. The single-column mobile wrapping machine is provided with a base (commonly known as a flat car) that can move on the guide rail. A column is installed on the base, a cross beam is installed on the column, and the cross beam is driven by a driving device of a motor installed at the top of the column through a lifting chain and can move up and down on the column. A wrapping mechanism truss is installed on the cross beam, and a wrapping mechanism and a workbench are installed on the truss. The wrapping mechanism consists of a pre-tightening mechanism and a clamping mechanism, and an electric control box is provided on one side of the workbench.

[0004] However, the initial design of the pre-tightening clamp in the laminate wrapping machine only has the function of pre-tightening the laminate. During the actual wrapping process, the wrapping machine needs to adjust the position of the longitudinal weld (the laminate joint position) when wrapping the laminate. Usually, two methods are adopted to achieve this. One is to use other equipment to assist in adjusting the position of the laminate longitudinal seam, or use the pre-tightening clamp as a lifting tool to lift the laminate and then cooperate with rotating the wrapped cylinder to complete the selection of the longitudinal weld position. If other equipment is used, first, adding equipment will cost extra, and second, the wrapping process will be more cumbersome; if the pre-tightening clamp is used for adjustment, during rotation, due to the friction force between the laminate and the wrapped cylinder, the force point directly acts on the pre-tightening clamp cylinder, so the pre-tightening clamp cylinder will be deformed and bent, which will slow down the work progress and increase the maintenance amount. Content of the Utility Model

[0005] In view of the above problems existing in the prior art, the pre-tightening pliers and the laminate wrapping machine provided by the present utility model are used to overcome the above defects in the prior art.

[0006] To achieve the above-mentioned utility model purpose, the technical solution adopted by the present utility model is as follows:

[0007] The pre-tightening pliers for a laminate wrapping machine include a bracket, a swing shaft, an oil cylinder, a piston rod, a coupling shaft, a connecting rod, a rotating shaft, a swing rod, a pin shaft, and a steel wire rope. The cylinder end of the oil cylinder is connected to the bracket. The upper end of the piston rod is inserted inside the oil cylinder, and the lower end is hinged to the two connecting rods through the coupling shaft. The upper ends of the two swing rods are respectively hinged to the bracket through the swing shaft. The ends of the two connecting rods away from the piston rod are respectively hinged to the lower ends of the two swing rods through the rotating shaft. One end of each of the two steel wire ropes is connected to the lower end of each of the two swing rods through the pin shaft. A first reinforcing rod is provided at the upper end of one of the swing rods, a second reinforcing rod is provided at the upper end of the other swing rod, a third reinforcing rod is provided between the first reinforcing rod and the second reinforcing rod, and both ends of the third reinforcing rod are respectively hinged to the first reinforcing rod and the second reinforcing rod.

[0008] In one embodiment, the first reinforcing rod is perpendicularly arranged with respect to the swing rod, and the end of the second reinforcing rod away from the swing rod is inclined upward.

[0009] In one embodiment, the first reinforcing rod and the second reinforcing rod are respectively arranged inside the swing rod.

[0010] In one embodiment, the cylinder end of the oil cylinder is hinged to the bracket.

[0011] The present utility model also provides a laminate wrapping machine, which is characterized by including the pre-tightening pliers for a laminate wrapping machine as described in any one of the above.

[0012] Compared with the prior art, the pre-tightening pliers and the laminate wrapping machine provided by the present utility model have the following advantages:

[0013] The pre-tightening pliers and the laminate wrapping machine provided by the present utility model add a first reinforcing rod, a second reinforcing rod, and a third reinforcing rod on the basis of the existing pre-tightening pliers, and both ends of the third reinforcing rod are respectively hinged to the first reinforcing rod and the second reinforcing rod. Because of the geometric structure relationship among the newly added first reinforcing rod, second reinforcing rod, and third reinforcing rod, the two swing rods will open and close synchronously, and the force in the horizontal direction is no longer borne by the oil cylinder, avoiding the phenomenon of the oil cylinder bending.

[0014] Secondly, the cylinder end of the oil cylinder and the bracket are connected by a hinge, which can prevent the gaps at the joints of the pre-tightening pliers from affecting the two swing rods, so that the synchronous movement of the two swing rods is inaccurate and the oil cylinder may be stressed again. Therefore, the fault tolerance rate of the entire pre-tightening pliers operation is improved. Brief Description of the Drawings

[0015] Figure 1 is a schematic structural view of an existing pre-tightening pliers;

[0016] Figure 2 is a schematic structural view of the present invention. Detailed Embodiment

[0017] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0018] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0019] In the present invention, unless otherwise clearly defined and limited, the terms "mounted", "connected", "connected to", "fixed" and other terms should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0021] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. 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 a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0022] As Figure 2 shown, for the convenience of description, the orientation reference of "up", "down", "left", "right", "front" and "back" in the present utility model is based on the orientation Figure 1 shown;

[0023] The pre-tightening pliers for a laminate wrapping machine include a bracket 1, a swing shaft 2, an oil cylinder 3, a piston rod 4, a coupling shaft 5, a connecting rod 6, a rotating shaft 7, a swing rod 8, a pin shaft 9 and a steel wire rope 10. The cylinder end of the oil cylinder 1 is connected to the bracket 1. The upper end of the piston rod 4 is inserted inside the oil cylinder 3, and the lower end is hinged to two connecting rods 6 through the coupling shaft 5. The upper ends of the two swing rods 8 are respectively hinged to the bracket 1 through the swing shaft 2. The ends of the two connecting rods 6 far from the piston rod 4 are correspondingly hinged to the lower ends of the two swing rods 8 through the rotating shaft 7. One ends of the two steel wire ropes 10 are correspondingly connected to the lower ends of the two swing rods 8 through the pin shaft 9. A first reinforcing rod 11 is arranged at the upper end of one swing rod 8, and a second reinforcing rod 12 is arranged at the upper end of the other swing rod 8. A third reinforcing rod 13 is arranged between the first reinforcing rod 11 and the second reinforcing rod 12, and both ends of the third reinforcing rod 13 are respectively hinged to the first reinforcing rod 11 and the second reinforcing rod 12.

[0024] Furthermore, the first reinforcing rod 11 is vertically arranged with respect to the swing rod 8, the end of the second reinforcing rod 12 far from the swing rod 8 is inclined upward, and the first reinforcing rod 11 and the second reinforcing rod 12 are respectively arranged inside the swing rod 8.

[0025] As can be seen from the above technical solution: on the basis of the existing pre-tightening pliers, a first reinforcing rod 11, a second reinforcing rod 12 and a third reinforcing rod 13 are added, and both ends of the third reinforcing rod 13 are hinged to the first reinforcing rod 11 and the second reinforcing rod 12 respectively. Because of the geometric structural relationship among the newly added first reinforcing rod 11, second reinforcing rod 12 and third reinforcing rod 13, the two swing rods 8 can be kept opening and closing synchronously, and the force in the transverse direction is no longer borne by the oil cylinder 3, thus avoiding the phenomenon of the oil cylinder 3 bending.

[0026] In one embodiment, the cylinder barrel end of the oil cylinder 3 is hinged to the bracket 1 through a hinge seat and a hinge shaft, which can prevent the gaps at the joint positions of the pre-tightening pliers from affecting the two swing rods 8, so that the synchronous movement of the two swing rods 8 is not accurate and the oil cylinder 3 may be stressed again. Therefore, the error tolerance rate of the whole pre-tightening pliers operation is improved.

[0027] The present utility model also provides a laminate wrapping machine, which is characterized by comprising the pre-tightening pliers for the laminate wrapping machine as described above.

[0028] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0029] The above-described embodiments only represent several implementation manners of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model should be subject to the appended claims.

Claims

1. A pre-tightening clamp for a layer board wrapping machine, comprising a bracket, a swing shaft, an oil cylinder, a piston rod, a coupling shaft, a connecting rod, a rotating shaft, a swing rod, a pin shaft and a steel wire rope, wherein the cylinder barrel end of the oil cylinder is connected to the bracket, the upper end of the piston rod is inserted into the inside of the oil cylinder, and the lower end is hinged to the two connecting rods through a coupling shaft, the upper ends of the two swing rods are respectively hinged to the bracket through the swing shaft, the ends of the two connecting rods away from the piston rod are hinged to the lower ends of the two swing rods through the rotating shaft, and one end of the two steel wire ropes is connected to the lower ends of the two swing rods through the pin shaft, characterized in that: A first reinforcing rod is arranged at the upper end of one of the swing rods, a second reinforcing rod is arranged at the upper end of the other swing rod, a third reinforcing rod is arranged between the first reinforcing rod and the second reinforcing rod, and both ends of the third reinforcing rod are respectively hinged to the first reinforcing rod and the second reinforcing rod.

2. The pre-tightening clamp for a laminate wrapping machine according to claim 1, characterized in that: The first reinforcing rod is vertically arranged between the swing rod, and the second reinforcing rod is tilted upward at one end away from the swing rod.

3. The pre-tightening clamp for a laminate wrapping machine according to claim 2, characterized in that: The first reinforcing rod and the second reinforcing rod are respectively arranged on the inner side of the swing rod.

4. The pre-tightening clamp for a laminate wrapping machine according to claim 1, characterized in that: The cylinder barrel end of the oil cylinder is hinged to the bracket.

5. Layer board wrapping machine, characterized in that: It comprises a pre-tightening clamp for a layer board wrapping machine as described in any one of claims 1 to 4 above.

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