Cylinder rod protective sleeve for hydraulic cylinder of hot blast stove

Abstract

The utility model relates to a cylinder rod protective sleeve for a hydraulic cylinder of a hot-blast stove and belongs to the technical field of metallurgical maintenance equipment. Comprising a body (1) and a gland (2), the body (1) is of a cylindrical structure, two lug-shaped mounting tables (11) are symmetrically arranged on the outer wall of the body (1), a circular bead I (12) and a circular bead II (13) are arranged in an inner cavity of the body (1), an oil storage cavity (3) is formed between the circular bead I (12) and the circular bead II (13), and the gland (2) and the body (1) are assembled together through matching of bolts (6), mounting holes (14) and threaded holes (7). The device is simple in structure and convenient to maintain, machine and install, the service life of spare parts is prolonged, the cost of the spare parts is reduced, and the inventory of the spare parts is reduced.

Description

Technical Field

[0001] The utility model relates to a protection sleeve for the cylinder rod of a hot blast stove hydraulic cylinder, belonging to the technical field of metallurgical maintenance equipment. Background Technique

[0002] The hot blast stove is a key equipment for blast furnace production, and its function is to control the cut-off of the valve through a hydraulic cylinder. Due to the poor on-site environment, most valves are exposed without being sealed, and some rust and fine particles will remain in the cylinder barrel groove. When the valve moves, the oil cylinder seal will be damaged by these particles or sundries. Seriously, scratches and pitted spots will appear on the inner wall of the cylinder barrel and the cylinder rod, resulting in oil leakage of the hydraulic cylinder, bringing pressure to environmental protection and on-site 5S. Only the oil stain can be cleaned regularly, and the seal and cylinder rod cannot be replaced online. Only by replacing the hydraulic cylinder can this problem be solved. When the scratches on the cylinder rod are serious, it will lead to the scrapping of the hydraulic cylinder, and at the same time increase the repair cost of spare parts and the workload of maintenance personnel. The on-site environment is complex, and replacing the oil cylinder increases the safety hazard of maintenance personnel. To solve these problems, it is necessary to design a protection sleeve for the cylinder rod of a hot blast stove hydraulic cylinder, which is convenient for maintenance, processing and installation, prolongs the service life of spare parts, and reduces the repair of spare parts. Content of the Utility Model

[0003] The purpose of the utility model is to provide a protection sleeve for the cylinder rod of a hot blast stove hydraulic cylinder, which is convenient for maintenance, processing and installation, prolongs the service life of spare parts, and reduces the repair of spare parts.

[0004] The technical solution of the utility model is: a protection sleeve for the cylinder rod of a hot blast stove hydraulic cylinder, including a body and a gland. The body is of a cylindrical structure, and two ear-shaped mounting platforms are symmetrically arranged on the outer wall. Bolt holes are arranged on the mounting platforms. A shoulder Ⅰ and a shoulder Ⅱ are arranged in the inner cavity of the body. The shoulder Ⅱ is arranged at the bottom of the inner cavity of the body, and the shoulder Ⅰ is arranged in the middle of the inner cavity of the body. An oil storage cavity is formed between the shoulder Ⅰ and the shoulder Ⅱ. A threaded hole is arranged on the upper end face of the body. The upper part of the gland is a ring-shaped metal part, and a cylindrical metal structural part is arranged at the lower end face of the ring-shaped metal part. A through hole mounting hole with a shoulder is arranged on the end face of the gland. The position and specification of the mounting hole match those of the threaded hole, and the gland and the body are assembled together by bolts matching the mounting hole and the threaded hole.

[0005] For the protection sleeve for the cylinder rod of a hot blast stove hydraulic cylinder as described above, a groove-shaped gap between the lower end face of the cylindrical metal structural part arranged at the lower end face of the gland and the upper end face of the shoulder Ⅰ is a sealing groove Ⅰ.

[0006] For the protection sleeve for the cylinder rod of a hot blast stove hydraulic cylinder as described above, a sealing groove Ⅱ is arranged on the outer side of the lower end face of the shoulder Ⅱ.

[0007] For the protection sleeve for the cylinder rod of a hot blast stove hydraulic cylinder as described above, the distance between the upper end face of the mounting platform and the upper end face of the body is 5-10 millimeters.

[0008] The beneficial effects of the present utility model are as follows: The device of the present utility model has a simple structure, which is convenient for maintenance, processing and installation. Using this protective cover can reduce or eliminate the damage to the cylinder head seal, extend the service life of spare parts, reduce the cost of spare parts, and lower the inventory of spare parts. Using this protective cover can reduce the scratches on the cylinder rod and the inner wall of the cylinder barrel of the hydraulic cylinder, reduce the repair cost and save costs. After using this protective cover, the seal can be replaced, and there is no need to replace the hydraulic cylinder to handle oil leakage, reducing the workload of maintenance personnel, and the leaked oil will not cause pressure to environmental protection and on-site 5S. Description of the Drawings

[0009] Figure 1 It is the front view of the device body of the present utility model;

[0010] Figure 2 It is the top view of the device body of the present utility model;

[0011] Figure 3 It is the front view of the gland of the device of the present utility model;

[0012] Figure 4 It is the top view of the gland of the device of the present utility model;

[0013] Figure 5 It is the assembly schematic diagram of the device body and the gland of the present utility model;

[0014] Figure 6 It is the schematic diagram of the use state of the device of the present utility model;

[0015] Markings in the figure: body 1, gland 2, oil storage cavity 3, seal groove I 4, bolt hole 5, bolt 6, threaded hole 7, seal groove II 8, cylinder rod 9, cylinder barrel 10, installation platform 11, shoulder I 12, shoulder II 13, installation hole 14. Detailed Embodiments

[0016] The following further illustrates the present utility model through examples in conjunction with the drawings.

[0017] As shown in the attached drawings, a protective sleeve for the cylinder rod of a hot blast stove hydraulic cylinder includes a body 1 and a gland 2. The body 1 is of a cylindrical structure, and two ear-shaped mounting platforms 11 are symmetrically arranged on the outer wall. Bolt holes 5 are provided on the mounting platforms 11. A shoulder Ⅰ12 and a shoulder Ⅱ13 are arranged in the inner cavity of the body 1. The shoulder Ⅱ13 is arranged at the bottom of the inner cavity of the body 1, and the shoulder Ⅰ12 is arranged in the middle of the inner cavity of the body 1. An oil storage cavity 3 is formed between the shoulder Ⅰ12 and the shoulder Ⅱ13. A threaded hole 7 is provided on the upper end surface of the body 1. The upper part of the gland 2 is an annular metal part, and a cylindrical metal structural part is arranged at the lower end surface of the annular metal part. A through hole mounting hole 14 with a shoulder is arranged on the end surface of the gland 2. The position and specifications of the mounting hole 14 match those of the threaded hole 7. The gland 2 and the body 1 are assembled together by matching and assembling with bolts 6 through the mounting hole 14 and the threaded hole 7. A groove-shaped gap, namely a sealing groove Ⅰ4, is formed between the lower end surface of the cylindrical metal structural part arranged at the lower end surface of the gland 2 and the upper end surface of the shoulder Ⅰ12. A sealing groove Ⅱ8 is arranged on the outer side of the lower end surface of the shoulder Ⅱ13. The distance from the upper end surface of the mounting platform 11 to the upper end surface of the body 1 is 8 mm.

[0018] Before replacing the oil cylinder, the bolt body 1 is fixed on the cylinder barrel 10 of the hydraulic cylinder through the bolt hole 5, that is, the protective sleeve is installed on the cylinder barrel 10 of the hydraulic cylinder. Sealing strips (transition fit) are assembled in the sealing groove Ⅰ4 and the sealing groove Ⅱ8. The sealing strips are sleeved on the cylinder rod 9 of the hydraulic cylinder to protect the seal on the cylinder head of the hydraulic cylinder. The oil storage cavity 3 is filled with oil, and the gland 2 and the body 1 are assembled together by matching and assembling with bolts 6 through the mounting hole 14 and the threaded hole 7.

[0019] When the oil cylinder operates, the assembled sealing strips in the sealing groove Ⅰ4 and the sealing groove Ⅱ8 on the body 1 well protect the seal of the cylinder head of the hydraulic cylinder. Due to the transition fit, the function of the seal at the sealing groove Ⅰ4 is that when there are sundries or granular dust, they will not be squeezed between the seal and the cylinder rod of the hydraulic cylinder, and there will be no scratches on the cylinder rod. These granular dust will fall into the oil storage cavity 3, and under the action of the lubricating oil, these dust will not be squeezed between the assembled sealing strip at the sealing groove Ⅱ8 and the cylinder rod 9 of the hydraulic cylinder, well protecting the seal of the cylinder head and the cylinder rod 9 of the hydraulic cylinder. The assembled sealing strips in the sealing groove Ⅰ4 and the sealing groove Ⅱ8 can be replaced online, and the oil tank can be refilled.

[0020] The device of the utility model has a simple structure, is convenient for maintenance, processing and installation. Using this protective sleeve will reduce or eliminate the damage to the seal of the cylinder head, extend the service life of spare parts, reduce the cost of spare parts, and reduce the inventory of spare parts. Using this protective sleeve will reduce the scratches on the cylinder rod and the inner wall of the cylinder barrel of the hydraulic cylinder, reduce the repair cost and save costs. After using this protective sleeve, the seal can be replaced, and there is no need to replace the hydraulic cylinder to deal with oil leakage, reducing the workload of maintenance personnel, and the oil leakage will not bring pressure to environmental protection and on-site environmental maintenance.

Claims

1. A protective sleeve for a hydraulic cylinder rod of a hot blast furnace, characterized in that The invention comprises a body (1) and a gland (2), wherein the body (1) is a cylindrical structure, and two ear-shaped mounting platforms (11) are symmetrically arranged on the outer wall, and bolt holes (5) are arranged on the mounting platforms (11). The inner cavity of the body (1) is provided with a shoulder I (12) and a shoulder II (13), wherein the shoulder II (13) is arranged at the bottom of the inner cavity of the body (1), and the shoulder I (12) is arranged in the middle of the inner cavity of the body (1), and an oil storage cavity is formed between the shoulder I (12) and the shoulder II (13). (3), a threaded hole (7) is provided on the upper end surface of the body (1), the upper part of the gland (2) is an annular metal component, and a cylindrical metal structural component is provided on the lower end surface of the annular metal component, and a shoulder through-hole mounting hole (14) is provided on the end surface of the gland (2), and the position and specification of the mounting hole (14) match the threaded hole (7), and the gland (2) and the body (1) are assembled together by matching the bolt (6) with the mounting hole (14) and the threaded hole (7).

2. The hot blast stove hydraulic cylinder rod protective cover as claimed in claim 1, characterized in that A groove-shaped gap is formed between the lower end surface of the cylindrical metal structure provided on the lower end surface of the gland (2) and the upper end surface of the shoulder I (12), which is a sealing groove I (4).

3. The hot blast stove hydraulic cylinder rod protective cover as claimed in claim 1, characterized in that A sealing groove II (8) is provided on the outer side of the lower end surface of the shoulder II (13).

4. The hot blast stove hydraulic cylinder rod protective cover as claimed in claim 1, characterized in that The upper end surface of the mounting platform (11) is 5-10 mm away from the upper end surface of the main body (1).

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