Hydraulic synchronous rolling mill lifting platform

Abstract

The utility model belongs to the technical field of cold rolling temper mill equipment, and particularly relates to a hydraulic synchronous rolling mill lifting platform. A constant-speed cylinder mode that the rod cavity of the left hydraulic cylinder and the rodless cavity of the right hydraulic cylinder are connected in series is adopted, synchronous lifting of the lifting platform is achieved in cooperation with the crank lifting mechanisms at the four corners of the platform, the problem that in the prior art, speed regulation of a speed regulation valve is not stable due to external factors is solved, and the problem that a synchronous shaft occupies space is also avoided; stable and synchronous lifting of four corners of the lifting platform can be realized under the condition of compact space; the rolling mill lifting platform is compact in overall structure, small in occupied space, convenient to use and reliable in operation.

Description

Technical Field

[0001] The utility model belongs to the technical field of cold rolling and leveling mill equipment, and in particular relates to a hydraulic synchronous rolling mill lifting platform. Background Art

[0002] A rolling mill lifting platform is usually provided on the operating side of a large cold rolling mill. When the support rolls are replaced, the platform drops down so that the support rolls can be pulled out from the operating side. After the roll replacement is completed, the platform rises so that the operator can stand and operate.

[0003] Since the operating area of ​​a large cold rolling mill is large, the lifting platform needs to adopt a hydraulic lifting method. The hydraulic cylinder drives the platform up and down. One platform usually requires two hydraulic cylinders to drive the lifting at the same time. To ensure that the platform does not tilt during the lifting process, the four corners of the platform must be lifted and lowered synchronously.

[0004] In order to achieve synchronous lifting, the rolling mill lifting platform in the prior art usually adopts mechanical synchronous lifting or hydraulic cylinder speed regulation lifting. From the perspective of use effect, although mechanical synchronization can achieve reliable synchronous lifting, it is necessary to set up a synchronization shaft to connect the two hydraulic cylinders, and the synchronization shaft needs to occupy a certain space, which cannot be achieved when the layout space is narrow; the hydraulic cylinder speed regulation lifting depends on the speed regulation accuracy of the speed control valve. Since the speed regulation effect is affected by external factors such as load and oil temperature, the synchronization effect is difficult to maintain stable. Utility Model Content

[0005] The technical problem to be solved by the utility model is: in view of the deficiencies in the prior art, a hydraulic synchronous rolling mill lifting platform is provided, which has a compact overall structure, occupies a small space, and can realize stable and synchronous lifting of the four corners of the lifting platform.

[0006] The technical solution adopted by the utility model to solve the above technical problems is:

[0007] A hydraulic synchronous rolling mill lifting platform, comprising a rectangular lifting platform 1, wherein a head left support base 2, a head right support base 3, a tail left support base 4, and a tail right support base 5 are respectively arranged below the four corners of the lifting platform 1, wherein the head left support base 2 and the head right support base 3 are connected to the two sides of the head bottom surface of the lifting platform 1 through two head crank lifting mechanisms 6, and the tail left support base 4 and the tail right support base 5 are connected to the two sides of the tail bottom surface of the lifting platform 1 through two tail crank lifting mechanisms 7, and the head crank lifting mechanism 6 is connected to the tail crank lifting mechanism 7 on the same side through a crank connecting rod 8, and the two tail crank lifting mechanisms 7 are respectively connected to a left lifting hydraulic cylinder 9 and a right lifting hydraulic cylinder 10;

[0008] The cross-sectional areas of the hydraulic push rods of the left lifting hydraulic cylinder 9 and the right lifting hydraulic cylinder 10 are the same, and the rod chamber of the left lifting hydraulic cylinder 9 is connected to the rodless chamber of the right lifting hydraulic cylinder 10 .

[0009] Preferably, the left lifting hydraulic cylinder 9 includes a left hydraulic cylinder push rod, a left hydraulic cylinder rod chamber 11 and a left hydraulic cylinder rodless chamber 12, and the left hydraulic cylinder rodless chamber 12 is connected to the hydraulic oil inlet pipeline.

[0010] Preferably, the right lifting hydraulic cylinder 10 includes a right hydraulic cylinder push rod, a right hydraulic cylinder rod chamber 13 and a right hydraulic cylinder rodless chamber 14, and the right hydraulic cylinder rod chamber 13 is connected to the hydraulic oil return pipeline.

[0011] Preferably, the rod chamber 11 of the left hydraulic cylinder is connected to the rodless chamber 14 of the right hydraulic cylinder via a connecting pipe 15 .

[0012] Preferably, the left side support base 2 of the head, the right side support base 3 of the head, the left side support base 4 of the tail, and the right side support base 5 of the tail are all fixed on the ground by bolt connection.

[0013] Preferably, the left lifting hydraulic cylinder 9 and the right lifting hydraulic cylinder 10 are both fixed to the ground by bolts.

[0014] Compared with the prior art, the utility model has the following main advantages:

[0015] 1. The utility model provides a hydraulic synchronous rolling mill lifting platform, which adopts a constant velocity cylinder form in which a left hydraulic cylinder with a rod cavity and a right hydraulic cylinder without a rod cavity are connected in series, and cooperates with the crank lifting mechanism at the four corners of the platform to realize the synchronous lifting of the lifting platform, thereby overcoming the problem of unstable speed regulation of the speed regulating valve in the prior art due to external factors, and also avoiding the problem of space occupation of the synchronous shaft, and can realize stable synchronous lifting of the four corners of the lifting platform in a compact space;

[0016] 2. The rolling mill lifting platform of the utility model has a compact overall structure, occupies a small space, is easy to use and operates reliably. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an overall side view of the rolling mill lifting platform in the embodiment of the utility model;

[0018] Figure 2 A top view of the hydraulic cylinder portion at the bottom of the lifting platform in the embodiment of the utility model;

[0019] Figure 3 It is a schematic diagram of the left and right hydraulic cylinders connected in series in an embodiment of the utility model.

[0020] In the figure: 1-lifting platform; 2-left side support base of head; 3-right side support base of head; 4-left side support base of tail; 5-right side support base of tail; 6-head crank lifting mechanism; 7-tail crank lifting mechanism; 8-crank connecting rod; 9-left side lifting hydraulic cylinder; 10-right side lifting hydraulic cylinder; 11-left side hydraulic cylinder rod chamber; 12-left side hydraulic cylinder rodless chamber; 13-right side hydraulic cylinder rod chamber; 14-right side hydraulic cylinder rodless chamber; 15-connecting pipeline. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. 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.

[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0024] In the description of the present application, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the products of the application are usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to 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.

[0025] The features and performance of the present application are further described in detail below in conjunction with the embodiments.

[0026] Embodiment 1, as Figures 1 to 3As shown, this embodiment provides a hydraulic synchronous rolling mill lifting platform, including a rectangular lifting platform 1, wherein a head left support base 2, a head right support base 3, a tail left support base 4, and a tail right support base 5 are respectively provided below the four corners of the lifting platform 1, wherein the head left support base 2 and the head right support base 3 are connected to the two sides of the head bottom surface of the lifting platform 1 through two head crank lifting mechanisms 6, and the tail left support base 4 and the tail right support base 5 are connected to the two sides of the tail bottom surface of the lifting platform 1 through two tail crank lifting mechanisms 7, and the head crank lifting mechanism 6 is connected to the tail crank lifting mechanism 7 on the same side through a crank connecting rod 8, and the two tail crank lifting mechanisms 7 are respectively connected to a left lifting hydraulic cylinder 9 and a right lifting hydraulic cylinder 10;

[0027] The cross-sectional areas of the hydraulic push rods of the left lifting hydraulic cylinder 9 and the right lifting hydraulic cylinder 10 are the same, and the rod chamber of the left lifting hydraulic cylinder 9 is connected to the rodless chamber of the right lifting hydraulic cylinder 10 .

[0028] Furthermore, the left lifting hydraulic cylinder 9 includes a left hydraulic cylinder push rod, a left hydraulic cylinder rod chamber 11 and a left hydraulic cylinder rodless chamber 12, and the left hydraulic cylinder rodless chamber 12 is connected to the hydraulic oil inlet pipeline.

[0029] Furthermore, the right lifting hydraulic cylinder 10 includes a right hydraulic cylinder push rod, a right hydraulic cylinder rod chamber 13 and a right hydraulic cylinder rodless chamber 14, and the right hydraulic cylinder rod chamber 13 is connected to the hydraulic oil return pipeline.

[0030] Furthermore, the rod chamber 11 of the left hydraulic cylinder is connected to the rodless chamber 14 of the right hydraulic cylinder via a connecting pipe 15 .

[0031] Furthermore, the left side support base 2 of the head, the right side support base 3 of the head, the left side support base 4 of the tail, and the right side support base 5 of the tail are all fixed on the ground by bolt connection.

[0032] Furthermore, the left lifting hydraulic cylinder 9 and the right lifting hydraulic cylinder 10 are both fixed to the ground by bolts.

[0033] Embodiment 2: This embodiment provides a hydraulic synchronous rolling mill lifting platform, which eliminates the synchronous shaft between the two lifting hydraulic cylinders of the traditional mechanical synchronous lifting platform, and adopts a constant-speed cylinder form in which the left hydraulic cylinder has a rod cavity and the right hydraulic cylinder has a rodless cavity in series, and the cross-sectional areas of the hydraulic push rods of the two left hydraulic cylinders are the same, thereby ensuring that the pushing speeds of the left and right lifting hydraulic cylinders are equal, thereby achieving synchronous action.

[0034] Specifically: During the ascending process, the hydraulic oil first enters the rodless chamber of the left hydraulic cylinder, and the hydraulic oil in the rod chamber of the left hydraulic cylinder enters the rodless chamber of the right hydraulic cylinder through the connecting pipeline. Since constant-speed hydraulic cylinders of the same area are used, the flow rate entering and discharged by the left hydraulic cylinder is equal to the flow rate entering and discharged by the right hydraulic cylinder, thereby ensuring that the pushing speeds of the left and right lifting hydraulic cylinders are equal, achieving synchronous action, and enabling the lifting platform to achieve synchronous lifting without the need for a synchronous axis.

[0035] Furthermore, all parts involved in this application that are not described in detail are the same as the prior art or are implemented using the prior art.

[0036] In summary:

[0037] 1. The utility model provides a hydraulic synchronous rolling mill lifting platform, which adopts a constant velocity cylinder form in which a left hydraulic cylinder with a rod cavity and a right hydraulic cylinder without a rod cavity are connected in series, and cooperates with the crank lifting mechanism at the four corners of the platform to realize the synchronous lifting of the lifting platform, thereby overcoming the problem of unstable speed regulation of the speed regulating valve in the prior art due to external factors, and also avoiding the problem of space occupation of the synchronous shaft, and can realize stable synchronous lifting of the four corners of the lifting platform in a compact space;

[0038] 2. The rolling mill lifting platform of the utility model has a compact overall structure, occupies a small space, is easy to use and operates reliably.

[0039] The above embodiments are only used to illustrate the design ideas and features of the utility model, and their purpose is to enable those skilled in the art to understand the content of the utility model and implement it accordingly. The protection scope of the utility model is not limited to the above embodiments. Therefore, any equivalent changes or modifications made based on the principles and design ideas disclosed by the utility model are within the protection scope of the utility model.

Claims

1. A hydraulic synchronous rolling mill lifting platform, characterized in that: The invention comprises a rectangular lifting platform (1), wherein a left side support base (2) for the head, a right side support base (3) for the head, a left side support base (4) for the tail, and a right side support base (5) for the tail are respectively arranged below the four corners of the lifting platform (1); the left side support base (2) for the head and the right side support base (3) for the head are connected to the two sides of the bottom surface of the head of the lifting platform (1) through two head crank lifting mechanisms (6); the left side support base (4) for the tail and the right side support base (5) for the tail are connected to the two sides of the bottom surface of the tail of the lifting platform (1) through two tail crank lifting mechanisms (7); the head crank lifting mechanism (6) is connected to the tail crank lifting mechanism (7) on the same side through a crank connecting rod (8); and the two tail crank lifting mechanisms (7) are respectively connected to a left lifting hydraulic cylinder (9) and a right lifting hydraulic cylinder (10); The cross-sectional areas of the hydraulic push rods of the left lifting hydraulic cylinder (9) and the right lifting hydraulic cylinder (10) are the same, and the rod chamber of the left lifting hydraulic cylinder (9) is connected to the rodless chamber of the right lifting hydraulic cylinder (10).

2. A hydraulic synchronous rolling mill lifting platform according to claim 1, characterized in that: The left lifting hydraulic cylinder (9) comprises a left hydraulic cylinder push rod, a left hydraulic cylinder rod chamber (11) and a left hydraulic cylinder rodless chamber (12), and the left hydraulic cylinder rodless chamber (12) is connected to a hydraulic oil inlet pipeline.

3. A hydraulic synchronous rolling mill lifting platform according to claim 2, characterized in that: The right lifting hydraulic cylinder (10) comprises a right hydraulic cylinder push rod, a right hydraulic cylinder rod chamber (13) and a right hydraulic cylinder rodless chamber (14), and the right hydraulic cylinder rod chamber (13) is connected to a hydraulic oil return pipeline.

4. A hydraulic synchronous rolling mill lifting platform according to claim 3, characterized in that: The rod chamber (11) of the left hydraulic cylinder is connected to the rodless chamber (14) of the right hydraulic cylinder via a connecting pipeline (15).

5. The hydraulic synchronous rolling mill lifting platform according to claim 1, characterized in that: The left side support base (2) of the head, the right side support base (3) of the head, the left side support base (4) of the tail, and the right side support base (5) of the tail are all fixed on the ground by bolt connection.

6. The hydraulic synchronous rolling mill lifting platform according to claim 1, characterized in that: The left lifting hydraulic cylinder (9) and the right lifting hydraulic cylinder (10) are both fixed on the ground by bolt connection.

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