Installation guide device for piston rod of balance cylinder of working roll of rolling mill

Abstract

The utility model discloses a rolling mill working roll balance cylinder piston rod installation guiding device, and belongs to the technical field of metallurgical equipment. The installation guide device for the piston rod of the balance cylinder of the working roll of the rolling mill comprises a guide ring capable of protecting a sealing assembly on a piston, the guide ring is formed by combining a semicircular right protective sleeve and a semicircular left protective sleeve, and the outer ring face of the right protective sleeve and the outer ring face of the left protective sleeve form a protective face. And the inner ring surfaces of the right protective sleeve and the left protective sleeve form a contact surface. According to the installation guide device for the piston rod of the balance cylinder of the working roll of the rolling mill, the guide ring is arranged on the piston of the oil cylinder rod in a sleeving mode, so that the guide ring conducts contact protection on a sealing assembly on the piston, a square coaxial sealing piece and a supporting ring on the piston can be effectively protected, and damage to the sealing assembly during installation is avoided. And a sealing assembly on the piston collides with the surface of the cylinder sleeve, so that a coaxial sealing piece and a supporting ring in the sealing assembly are damaged, and the sealing effect is affected.

Description

Technical Field

[0001] The utility model relates to the technical field of metallurgical equipment, in particular to a guide device for installing a piston rod of a balancing cylinder of a working roll of a rolling mill. Background Art

[0002] The rolling mill in metallurgical equipment is the equipment for the metal rolling process, which generally refers to the equipment that completes the entire process of rolled material production. The working roll balancing cylinder is an important part of the rolling mill. For example, there are four upper working roll balancing cylinders and four lower working roll balancing cylinders in the R2 rolling mill. Their function is to eliminate gaps, avoid impacts, help lift the rolling rolls, and avoid slipping between the working rolls and the support rolls.

[0003] The piston rod is a connecting component that supports the piston to do work. It is mostly used in oil cylinders and cylinder motion actuators. It is a moving component that moves frequently and has high technical requirements. Take the hydraulic cylinder as an example. It consists of: cylinder barrel, piston rod (oil cylinder rod), piston, and end cover. In order to keep the piston rod sealed during operation, the working roll balance cylinder usually sets a coaxial seal assembly with a square cross section on the piston of the piston rod for sealing.

[0004] When the working roll balancing cylinder on the existing rolling mill is worn or leaks oil, the piston rod can only be replaced and repaired during the maintenance process, which is easily limited by the installation environment. As a result, the piston coaxial seal assembly and support ring are often damaged during the installation of the piston rod, which affects the sealing effect and causes problems such as difficult installation and poor installation quality. Utility Model Content

[0005] In view of the problems existing in the above-mentioned prior art, the utility model provides a rolling mill working roll balancing cylinder piston rod installation guide device, which has the technical effect of protecting the coaxial seal of the device when the piston rod is replaced.

[0006] In order to solve the above technical problems and achieve the above technical effects, the present invention is implemented through the following technical solutions:

[0007] The technical solution of the utility model is: a rolling mill working roll balancing cylinder piston rod installation guide device, including: a guide ring capable of protecting a sealing component on a piston, the guide ring is composed of a right protective sleeve of a semicircular ring and a left protective sleeve of a semicircular ring, the outer ring surfaces of the right protective sleeve and the left protective sleeve constitute a protective surface, and the inner ring surfaces of the right protective sleeve and the left protective sleeve constitute a contact surface; a splicing component is arranged between the right protective sleeve and the left protective sleeve, the splicing component includes a connecting seat arranged on both sides of the right protective sleeve and a connecting block arranged on both sides of the left protective sleeve, and a connecting groove used to match the connecting block is opened inside the connecting seat.

[0008] Furthermore, a hidden groove is provided on the surface of the connecting seat, and a fixing bolt capable of fixing the connecting block is arranged inside the hidden groove.

[0009] Furthermore, a 45° inclined surface is formed between the end surface of the guide ring and the contact surface.

[0010] Furthermore, the size of the guide ring is adapted to the size of the cylinder sleeve end surface of the balancing cylinder.

[0011] Furthermore, the diameter of the protection surface is 180 mm, and the diameter of the contact surface is 160 mm.

[0012] Furthermore, the surfaces of the right protective cover, the left protective cover and the connecting seat are smoothed.

[0013] Furthermore, the sealing assembly includes a support ring and a coaxial sealing ring arranged on the surface of the support ring.

[0014] Furthermore, the diameter of the piston is smaller than the diameter of the guide ring, and the height of the piston is smaller than the height of the guide ring.

[0015] The beneficial technical effect of the utility model is that the guide ring is sleeved on the piston of the cylinder rod, so that the guide ring can provide contact protection for the sealing assembly on the piston, and can effectively protect the square coaxial seal and support ring on the piston. During installation, the guide ring is aligned with the port of the balance cylinder sleeve, and then the cylinder rod is pushed inward, so that the cylinder rod is directed to move in the guide ring to enter the interior of the cylinder sleeve, thereby preventing the sealing assembly on the piston from colliding with the surface of the cylinder sleeve during installation, causing damage to the coaxial seal and support ring in the sealing assembly, thereby affecting the sealing effect. The guide ring is designed as a combination of a right protective sleeve and a left protective sleeve, and when the guide ring needs to be sleeved on the cylinder rod, it can be spliced ​​and assembled to avoid collision between the sealing assembly and the end face of the guide ring, which may cause the seal in the sealing assembly to shift, thereby further improving stability, and effectively improving the installation quality and installation accuracy of the cylinder rod without affecting the normal use of the cylinder rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of the structure in which the guide ring of the utility model is assembled on the oil cylinder rod;

[0017] Figure 2 It is a schematic diagram of the structure of the guide ring of the utility model from top view;

[0018] Figure 3 It is a schematic side cross-sectional view of the structure of the guide ring of the utility model;

[0019] Figure 4 It is a structural stereoscopic schematic diagram of the guide ring of the utility model;

[0020] Figure 5 This utility model Figure 2 A magnified schematic diagram of the structure.

[0021] The numbers and letters in the figure represent the corresponding component names:

[0022] 1. Guide ring; 11. Right protective cover; 12. Left protective cover; 122. Connecting block; 13. Fixing bolt; 14. Connecting seat; 141. Connecting groove; 142. Hidden groove; 2. Cylinder rod; 21. Piston. DETAILED DESCRIPTION

[0023] In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the specific implementation methods of the utility model are further described in detail below in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0024] See attached Figure 1-4 As shown, the rolling mill working roll balancing cylinder piston rod installation guide device of the present invention includes a guide ring 1 capable of protecting the sealing assembly on the piston 21, the guide ring 1 is composed of a right protective sleeve 11 of a semicircular ring and a left protective sleeve 12 of a semicircular ring, the outer ring surfaces of the right protective sleeve 11 and the left protective sleeve 12 constitute a protective surface, the inner ring surfaces of the right protective sleeve 11 and the left protective sleeve 12 constitute a contact surface, the size of the guide ring 1 is compatible with the end surface size of the cylinder sleeve of the balancing cylinder, the diameter of the protective surface is 180 mm, the diameter of the contact surface is 160 mm, and a 45° inclined surface is formed between the end surface of the guide ring 1 and the contact surface.

[0025] By designing the guide ring 1 so that its size matches the end face of the cylinder sleeve of the balance cylinder, after the guide ring 1 is in contact and aligned with the cylinder sleeve, the cylinder rod 2 in the guide ring 1 moves inward and can directly enter the cylinder sleeve of the balance bar, thereby avoiding collision between the sealing component on the surface of the oil plug 21 and the end face of the cylinder sleeve of the balance bar.

[0026] When the cylinder rod 2 is replaced, after the old cylinder rod 2 is disassembled, the guide ring 1 is first sleeved on the surface of the piston 21 in the new cylinder rod 2, so that the sealing assembly at the bottom of the piston 21 is covered and protected by the guide ring 1 to prevent the sealing assembly at the bottom of the piston 21 from colliding with the cylinder sleeve end cover of the balance bar during installation of the cylinder rod 2. Subsequently, the guide ring 1 on the cylinder rod 2 is aligned with the end surface of the cylinder sleeve of the balance bar, so that the guide ring 1 corresponds to the cylinder sleeve of the balance bar, and then the cylinder rod 2 is pushed inward to allow the cylinder rod 2 and the piston 21 to enter the cylinder sleeve of the balance bar, thereby avoiding the problem of displacement or deformation of the sealing assembly caused by the collision of the sealing assembly at the bottom of the piston 21 with the cylinder sleeve end cover of the balance bar during installation of the cylinder rod 2, thereby affecting the sealing of the sealing assembly.

[0027] A splicing assembly is arranged between the right protective cover 11 and the left protective cover 12, and the splicing assembly includes a connecting seat 14 arranged on both sides of the right protective cover 11 and a connecting block 122 arranged on both sides of the left protective cover 12. A connecting groove 141 for matching the connecting block 122 is opened inside the connecting seat 14, and a hidden groove 142 is opened on the surface of the connecting seat 14. A fixing bolt 13 capable of fixing the connecting block 122 is arranged inside the hidden groove 142.

[0028] The right protective sleeve 11 and the left protective sleeve 12 are designed as semicircular rings. The right protective sleeve 11 and the left protective sleeve 12 can form a circular guide ring 1. When the guide ring 1 needs to be installed on the piston 21 of the cylinder rod 2, the right protective sleeve 11 and the left protective sleeve 12 can be respectively attached to the two sides of the piston 21, and then approach each other, so that the connecting block 122 on the left protective sleeve 12 is inserted into the connecting seat 14, and then auxiliary fixation is performed, so that the right protective sleeve 11 and the left protective sleeve 12 form an annular guide ring 1, and then the fixing bolt 13 is gradually screwed into the connecting groove 141 through the hidden groove 142 to fix the connecting block 122, so that the right protective sleeve 11 and the left protective sleeve 12 can be assembled, and there is no need to connect the end face of the guide ring 1 with the end face of the piston 21. In this way, the end face of the sealing assembly and the guide ring 1 can be avoided, which causes the seal in the sealing assembly to be offset, further improves the stability, and effectively improves the installation quality and installation accuracy of the cylinder rod 2 without affecting the normal use process of the cylinder rod 2.

[0029] The surfaces of the right protective cover 11, the left protective cover 12 and the connecting seat 14 are all designed to be smooth, the diameter of the piston 21 is smaller than the diameter of the guide ring 1, the height of the piston 21 is smaller than the height of the guide ring 1, the diameter of the cylinder rod 2 is smaller than the diameter of the piston 21, and the height of the cylinder rod 2 is greater than the height of the guide ring 1.

[0030] By arranging the surfaces of the right protective cover 11, the left protective cover 12 and the connecting seat 14 to be smooth, the surface of the guide ring 1 is relatively smooth and has no burrs, which will not affect the normal installation of the cylinder rod 2 and can protect the bottom sealing assembly of the piston 21.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as within the protection scope of the present invention.

Claims

1. A rolling mill working roll balancing cylinder piston rod installation guide device, characterized in that: include: A guide ring (1) capable of protecting a sealing assembly on a piston (21), the guide ring (1) being composed of a right semicircular protective sleeve (11) and a left semicircular protective sleeve (12), the outer annular surfaces of the right protective sleeve (11) and the left protective sleeve (12) forming a protective surface, and the inner annular surfaces of the right protective sleeve (11) and the left protective sleeve (12) forming a contact surface; A splicing assembly is provided between the right protective cover (11) and the left protective cover (12), the splicing assembly comprising a connecting seat (14) provided on both sides of the right protective cover (11) and a connecting block (122) provided on both sides of the left protective cover (12), the connecting seat (14) being provided with a connecting groove (141) for matching with the connecting block (122).

2. The rolling mill working roll balancing cylinder piston rod installation guide device according to claim 1, characterized in that: A hidden groove (142) is provided on the surface of the connection seat (14), and a fixing bolt (13) capable of fixing the connection block (122) is arranged inside the hidden groove (142).

3. The rolling mill working roll balancing cylinder piston rod installation guide device according to claim 2, characterized in that: A 45° inclined surface is formed between the end surface of the guide ring (1) and the contact surface.

4. The rolling mill working roll balancing cylinder piston rod installation guide device according to claim 3, characterized in that: The size of the guide ring (1) is adapted to the size of the cylinder sleeve end surface of the balancing cylinder.

5. The rolling mill working roll balancing cylinder piston rod installation guide device according to claim 4, characterized in that: The diameter of the protection surface is 180 mm, and the diameter of the contact surface is 160 mm.

6. The rolling mill working roll balancing cylinder piston rod installation guide device according to claim 1, characterized in that: The surfaces of the right protective cover (11), the left protective cover (12) and the connecting seat (14) are smoothed.

7. The rolling mill working roll balancing cylinder piston rod installation guide device according to claim 1, characterized in that: A sealing assembly is arranged on the surface of the piston (21), and the sealing assembly comprises a support ring and a coaxial sealing ring arranged on the surface of the support ring.

8. The rolling mill working roll balancing cylinder piston rod installation guide device according to claim 1, characterized in that: The diameter of the piston (21) is smaller than the diameter of the guide ring (1), and the height of the piston (21) is smaller than the height of the guide ring (1).

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