Novel connecting device for anti-explosion valve of hydraulic cylinder of water fender of rolling mill

Abstract

The utility model relates to a novel connecting device for an explosion-proof valve of a hydraulic cylinder of a water fender of a rolling mill, which belongs to the field of hydraulic devices and comprises a connecting block and a dustproof cover, the dustproof cover is arranged at one end of the connecting block, the other end of the connecting block is connected onto the hydraulic cylinder through a connecting block bolt, the explosion-proof valve is sealed in the connecting block, and one end of the explosion-proof valve is arranged in the connecting block. The other end extends out of the dustproof cover and is connected with a pipeline; the connecting block is of a hollow structure with an opening in one end, a first cavity, a second cavity, an oil outlet cavity and an oil outlet which are communicated with one another are formed in the connecting block, one end of the oil outlet penetrates through the outer wall of the connecting block and corresponds to an oil outlet hole in the hydraulic cylinder, the other end of the oil outlet is communicated with the oil outlet cavity, and a fastening bolt is arranged on the outer surface of the first cavity and used for fastening an anti-explosion valve in the connecting block; the device effectively solves the problem of unreliable connection of the explosion-proof valve of the hydraulic cylinder of the water fender, is convenient to use and good in reliability, improves the operation stability of rolling mill equipment, and reduces equipment faults.

Description

Technical Field

[0001] The utility model relates to a connection device, in particular to a new connection device for a hydraulic cylinder explosion-proof valve of a rolling mill water baffle, belonging to the field of hydraulic devices. Background Art

[0002] The 5-meter rolling line of the steel wide and thick plate plant is well-equipped, compact, complete and competitive. The rolling line equipment is heavy and the installed power is high. The water retaining plate of the rolling mill is mainly used for the lifting and lowering of the rolling mill descaling guide and the adjustment of the gap between the water retaining plate and the lower guard plate of the working roll after the rolling mill roll change is completed to prevent the water retaining plate from being damaged by the warping plate during the production process. The water retaining plate of the rolling mill is divided into inlet and outlet water retaining plates, and two water retaining plate hydraulic cylinders are arranged on each side. When designing the water retaining plate hydraulic cylinder, an explosion-proof valve is installed on the rod side of the hydraulic cylinder to prevent sudden situations such as abnormal oil pipes or oil leakage. Figure 1 As shown, during the descaling process of the rolling mill, the impact of the descaling water will cause the pipes connected to the explosion-proof valve to swing back and forth, resulting in frequent thread damage and oil leakage at the joints of the explosion-proof valve. The high temperature and high humidity environment will accelerate the corrosion of the joints of the explosion-proof valve. The explosion-proof valve is large in size, difficult to install, and takes a long time to handle. It causes an average of 7 unplanned downtimes and more than 190 minutes of downtime due to failures each year, and is prone to fire risks, which is not conducive to stable production.

[0003] Therefore, developing a new type of connection device for the hydraulic cylinder explosion-proof valve of the water retaining plate of a rolling mill that can overcome the above defects has become a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide a new connection device for the hydraulic cylinder explosion-proof valve of a rolling mill water baffle, which effectively solves the problem of unreliable connection of the hydraulic cylinder explosion-proof valve of the water baffle, is easy to use, has good reliability, improves the operating stability of the rolling mill equipment, and reduces equipment failures.

[0005] In order to solve the above technical problems, the utility model provides a new type of connection device for the explosion-proof valve of the hydraulic cylinder of the water retaining plate of the rolling mill, which connects the explosion-proof valve to the hydraulic cylinder, including a connection block and a dust cover, one end of the connection block is provided with a dust cover, and the other end is connected to the hydraulic cylinder through the connection block bolts, and the connection block is provided with an explosion-proof valve sealed by the dust cover, one end of the explosion-proof valve is arranged in the connection block, and the other end extends out of the dust cover and is connected to a pipeline;

[0006] The connecting block is a hollow structure with an open end. A first chamber, a second chamber, an oil outlet chamber and an oil outlet are provided in the connecting block. A dust cover is provided at one end of the first chamber, one end of the second chamber is connected to the first chamber, and the other end is connected to the oil outlet chamber. The oil outlet is perpendicular to the oil outlet chamber. One end of the oil outlet penetrates the outer wall of the connecting block and corresponds to the oil outlet hole on the hydraulic cylinder, and the other end is connected to the oil outlet chamber. The first chamber and the second chamber are adapted to the explosion-proof valve. Several fixing holes are evenly distributed on the outer surface of the first chamber. Tightening bolts are provided in the fixing holes for fastening the explosion-proof valve in the connecting block.

[0007] The technical solution further defined in the utility model is:

[0008] Furthermore, in the aforementioned novel connection device for the explosion-proof valve of the hydraulic cylinder of the rolling mill water retaining plate, an internal thread is provided in the second chamber, and one end of the explosion-proof valve is threadedly connected to the second chamber of the connecting block through a double-wire joint.

[0009] Technical effect: the explosion-proof valve is connected by a double-wire joint thread, which improves the stability of the explosion-proof valve in the connecting block, reduces shaking, and is easy to install and disassemble.

[0010] In the aforementioned new connection device for the explosion-proof valve of the rolling mill water retaining plate hydraulic cylinder, a fluororubber circular sealing gasket is provided between the fixing bolt and the outer surface of the connecting block, and the fixing bolt passes through the connecting block and abuts against the surface of the explosion-proof valve arranged in the connecting block.

[0011] Technical effect: The explosion-proof valve is standard and the surface cannot be drilled for fixing. The explosion-proof valve is relatively long. After installation, screw the fixing screw into the fixed threaded hole and tighten it so that the fixing bolt rests on the surface of the explosion-proof valve to prevent the explosion-proof valve from shaking during the production process and improve stability. A fluororubber circular sealing gasket is configured between the fixing bolt and the connecting block to prevent high-temperature water vapor.

[0012] In the aforementioned new connection device for the explosion-proof valve of the hydraulic cylinder of the rolling mill water retaining plate, one side of the connection block connected to the hydraulic cylinder is concave to form a sealing groove, and an O-ring is arranged in the sealing groove.

[0013] The technical effect is that a sealing groove is arranged at one end where the connecting block is connected to the hydraulic cylinder, which is conducive to setting an O-ring, improving the sealing performance and preventing oil leakage.

[0014] In the aforementioned new connection device of the explosion-proof valve of the hydraulic cylinder of the rolling mill water baffle, the dust cover is connected to the connection block by bolts, and the connection block is provided with threaded holes at the four corners of one side of the first chamber and the four corners of the dust cover respectively, and a hexagonal opening is provided in the middle of the dust cover to match the explosion-proof valve, a hexagonal sealing groove is provided around the hexagonal opening on the inner side of the dust cover, a hexagonal dustproof pad is provided in the hexagonal sealing groove, and a dustproof sealing groove is provided on the side of the connection block where the threaded hole is provided, and a sealing ring is provided in the dustproof sealing groove.

[0015] Technical effect: A dustproof sealing groove and a sealing ring are provided between the dust cover and the connecting block, which are conducive to sealing, prevent dust from entering, and improve the stability of the explosion-proof valve connection. A hexagonal sealing groove and a hexagonal sealing gasket are provided on the inner side of the dust cover to ensure the sealing between the dust cover and the explosion-proof valve when the explosion-proof valve extends out of the dust cover.

[0016] In the aforementioned new type connecting device for the explosion-proof valve of the hydraulic cylinder of the rolling mill water retaining plate, hydraulic oil is filled between the connecting device and the explosion-proof valve arranged in the connecting device.

[0017] Technical effect: filling hydraulic oil is used to protect the joint threads and mating surfaces between the explosion-proof valve and the connecting device.

[0018] In the aforementioned new type connection device for the explosion-proof valve of the hydraulic cylinder of the rolling mill water retaining plate, one end of the explosion-proof valve extending out of the dust cover is connected to the pipeline through a double-wire joint.

[0019] Technical effect, double-wire joint connection, easy to install and disassemble, easy to use.

[0020] In the aforementioned new connection device for the rolling mill water retaining plate hydraulic cylinder explosion-proof valve, the cross-section of the connecting block is an L-shaped structure, one end of the connecting block with a second chamber is connected to the hydraulic cylinder, and a gap is left between the end of the connecting block with a first chamber and the hydraulic cylinder.

[0021] The technical effect is an L-shaped structure. One end of the connecting block is directly fixed on the hydraulic cylinder, and a gap is left between the other end and the hydraulic cylinder to facilitate the setting of the tightening bolts at the back. The gap will not hit the hydraulic cylinder and damage the hydraulic cylinder. The design is more reasonable and the operation is more convenient.

[0022] The beneficial effects of the utility model are:

[0023] In the original design process, the explosion-proof valve was directly connected to the hydraulic cylinder through the hydraulic cylinder transition block thread. Figure 1 As shown, during use, the threads of the explosion-proof valve connection joint are easily damaged, and oil leakage often occurs. The joint and the explosion-proof valve are quickly corroded by scale water. After the threads are damaged, they cannot be replaced a second time and can only be completely updated. The form of the explosion-proof valve connection block is improved. The utility model adopts a stainless steel L-shaped device, and the explosion-proof valve is built into the L-shaped device. The upper part is sealed with an end cover to prevent dust, water, and oxides, thereby improving the reliability of the water retaining plate explosion-proof valve connection.

[0024] The utility model discloses sealing gaskets are arranged at the connection of the connecting block and the hydraulic cylinder, the connection of the dust cover and the connecting block, and the connection of the dust cover and the explosion-proof valve for good sealing, which can effectively prevent dust and water, oxides and oil leakage, improve the reliability and operation stability of the connection of the water retaining plate and the explosion-proof valve, and reduce the downtime caused by failure.

[0025] The connecting device of the utility model has a simple structure and is also suitable for connecting the explosion-proof valve of a heavy-duty hydraulic cylinder in harsh environments such as high temperature and high humidity.

[0026] One end of the explosion-proof valve of the utility model is threadedly connected to the connecting block through a double-thread joint, and then a fixing bolt passes through the connecting block and abuts against the surface of the explosion-proof valve for further fixing, thereby avoiding shaking and improving stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the connection between the explosion-proof valve and the hydraulic cylinder in the prior art;

[0028] Figure 2 This is a structural schematic diagram of a new type of connection device for a hydraulic cylinder explosion-proof valve of a water retaining plate of a rolling mill according to an embodiment of the utility model;

[0029] Figure 3 This is a structural schematic diagram of a new type of connecting device for a hydraulic cylinder explosion-proof valve of a water retaining plate of a rolling mill according to an embodiment of the utility model, which connects an explosion-proof valve to a hydraulic cylinder;

[0030] Figure 4 for Figure 2 The structural diagram of the connection block in the figure;

[0031] Figure 5 for Figure 4 Right view of;

[0032] Figure 6 for Figure 4 Right side view of the connecting block after inserting the fixing bolts;

[0033] Figure 7 for Figure 4 A top view of

[0034] Figure 8 for Figure 7 AA section view;

[0035] Fig. 9 for Figure 2 Schematic diagram of the structure of the middle dust cover;

[0036] Fig.10 for Fig. 9 A top view of

[0037] Fig.11 for Fig. 9 Schematic diagram of the structure of the hexagonal dustproof pad;

[0038] Fig.12 for Fig.11 A top view of

[0039] Fig.13 This is a structural schematic diagram of the connection between a new type of connecting device for a hydraulic cylinder explosion-proof valve of a water retaining plate of a rolling mill and an explosion-proof valve in an embodiment of the utility model;

[0040] In the figure: 1-hydraulic cylinder, 2-hydraulic cylinder transition block, 3-explosion-proof valve, 4-connecting block bolt, 5-connecting block, 51-first chamber, 52-second chamber, 53-oil outlet chamber, 54-oil outlet, 6-dust cover, 61-hexagonal opening, 7-O-ring, 8-fastening bolt, 9-bolt, 10-sealing ring, 11-hexagonal dustproof pad, 12-round sealing pad, 13-hydraulic oil, 14-dustproof sealing groove, 15-threaded hole. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them; the technical features involved in the various implementation methods of the utility model described below can be combined with each other as long as they do not conflict with each other. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example 1

[0042] This embodiment provides a new type of connection device for the explosion-proof valve of the hydraulic cylinder of the rolling mill water retaining plate, the structure of which is as follows Figure 2-3 As shown, the explosion-proof valve 3 is connected to the hydraulic cylinder 1. The hydraulic cylinder, the explosion-proof valve and the connecting device are all arranged vertically, including a connecting block 5 and a dust cover 6. One end of the connecting block 5 is provided with a dust cover 6, and the other end is connected to the hydraulic cylinder 1 through a connecting block bolt 4. The explosion-proof valve 3 is sealed in the connecting block 5 through the dust cover 6. One end of the explosion-proof valve 3 is arranged in the connecting block 5, and the other end extends out of the dust cover 6 and is connected to a pipeline.

[0043] See also Figure 4-8The connecting block 5 is a hollow structure with an open end, and its cross section is an L-shaped structure. One end of the connecting block 5 provided with a second chamber 52 is connected to the hydraulic cylinder 1. A gap is left between one end of the connecting block 5 provided with a first chamber 51 and the hydraulic cylinder 1. The connecting block 5 is provided with a first chamber 51, a second chamber 52, an oil outlet chamber 53 and an oil outlet 54. A dust cover 6 is provided at one end of the first chamber 51. One end of the second chamber 52 is connected to the first chamber 51, and the other end is connected to the oil outlet chamber 53. The oil outlet 54 is perpendicular to the oil outlet chamber 53. One end of the oil outlet 54 penetrates the outer wall of the connecting block 5 and corresponds to the oil outlet hole on the hydraulic cylinder 1, and the other end is connected to the outlet. The oil chamber 53 is connected, the first chamber 51 and the second chamber 52 are adapted to the explosion-proof valve 3, the outer surface of the first chamber 51 is uniformly distributed with a number of fixing holes, and a fixing bolt 8 is provided in the fixing hole for fastening the explosion-proof valve 3 in the connecting block 5, and a fluororubber circular sealing gasket 12 is also provided between the fixing bolt 8 and the outer surface of the connecting block 5, and the fixing bolt 8 passes through the connecting block 5 and rests on the surface of the explosion-proof valve 3 in the connecting block 5 for fixing; one side of the connecting block 5 connected to the hydraulic cylinder 1 is concave to form a sealing groove, and an O-ring 7 is provided in the sealing groove. After the O-ring 7 is installed, a 12.9 grade stainless steel half-thread hexagon socket bolt is used on the outside to fix the connecting device on the hydraulic cylinder;

[0044] See also Figure 9-12 The dust cover 6 is connected to the connecting block 5 by bolts 9. The connecting block 5 is provided with threaded holes 15 at four corners of one side of the first chamber 51 and at four corners of the dust cover 6, respectively. A hexagonal opening 61 is provided in the middle of the dust cover 6 to match the explosion-proof valve 3. A hexagonal sealing groove is provided around the hexagonal opening 61 on the inner side of the dust cover 6. A hexagonal dustproof pad 11 is provided in the hexagonal sealing groove. The dust removal corner of the hexagonal dustproof pad faces outward and is fixed with bolts. A dustproof sealing groove 14 is also provided around the connecting block opening on one side of the threaded hole 15. A sealing ring is provided in the dustproof sealing groove 14, which can be an O-ring.

[0045] In this example, see Fig.13 An internal thread is provided in the second chamber 52, one end of the explosion-proof valve 3 is threadedly connected to the second chamber 52 of the connecting block 5 through a double-thread joint, and one end of the explosion-proof valve 3 extending out of the dust cover 6 is connected to the pipeline through a double-thread joint. The double-thread joint improves stability and facilitates installation and disassembly. Hydraulic oil 13 is filled between the connecting device and the explosion-proof valve 3 arranged in the connecting device.

[0046] The vertical explosion-proof valve in this embodiment adopts a Buch RS32 explosion-proof valve; the connecting block is made of stainless steel.

[0047] During the specific implementation, one end of the explosion-proof valve 3 is covered with a double-wire joint and threadedly connected to the second chamber 52 of the connecting block 5. After the explosion-proof valve 3 is installed, the fixing screw 8 is screwed into the threaded hole 15 and tightened to prevent the explosion-proof valve 3 from shaking during the production process. The fixing bolt is equipped with a fluororubber circular sealing gasket to prevent high-temperature water vapor and filled with hydraulic oil. Then, the dust cover 6 is inserted into the other end of the explosion-proof valve. A hexagonal sealing groove is opened inside the dust cover. Before installation, the hexagonal dust cover is placed with the dustproof corner facing outward and fixed with bolts. A sealing groove is opened on the connecting surface of the connecting device and the hydraulic cylinder. After the sealing ring is installed, a 12.9-grade stainless steel half-thread hexagon socket bolt is used on the outside to fix the L-shaped connecting device on the hydraulic cylinder. The connecting device is vertically arranged, and hydraulic oil is filled between its interior and the explosion-proof valve to protect the joint thread and mating surface between the explosion-proof valve and the L-shaped connecting block.

[0048] By adopting the connection device of the present application, after the explosion-proof valve connection modification of the two water baffle hydraulic cylinders on the inlet operation side and the inlet transmission side of the rolling mill, the service life of the water baffle explosion-proof valve is increased from the original 3 months to 2.5 years, the unreliable connection of the explosion-proof valve is completely eliminated, and it can be repeatedly disassembled and assembled, effectively solving the problem that the original explosion-proof valve needs to be replaced with a new part after one disassembly and assembly. The connection modification of the two water baffle hydraulic cylinder explosion-proof valves on the outlet operation side and the outlet transmission side of the rolling mill was completed simultaneously by medium repair. Since the modification, there has been no water baffle explosion-proof valve failure, and the dust cover design effectively reduces the occurrence of water vapor and oxides in the explosion-proof valve connection block, effectively extending the service life of the explosion-proof valve. The average annual downtime of failure is reduced by more than 190 minutes, and the fire hazard in the red steel operation area of ​​the rolling mill water baffle is reduced, generating an average annual economic benefit of 206,300 yuan. Through the improvement of the connection method, it is simultaneously used in the hydraulic system of the billet turning machine for use, and a good replacement effect has been achieved.

[0049] The utility model improves the explosion-proof valve connection device, effectively improves the reliability of the explosion-proof valve connection of the rolling mill water baffle hydraulic cylinder; improves the stability of the hydraulic cylinder operation under harsh working conditions such as high temperature, high humidity, and high oxide content; increases the service life of the explosion-proof valve, and has a good replacement effect under heavy load and harsh working conditions.

[0050] In addition to the above embodiments, the present invention may also have other implementations. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope required by the present invention.

Claims

1. A novel connection device for an explosion-proof valve of a hydraulic cylinder of a rolling mill water retaining plate, connecting an explosion-proof valve (3) to a hydraulic cylinder (1), characterized in that: It comprises a connecting block (5) and a dust cover (6), wherein one end of the connecting block (5) is provided with the dust cover (6), and the other end is connected to the hydraulic cylinder (1) via a connecting block bolt (4); the explosion-proof valve (3) is sealed in the connecting block (5) via the dust cover (6); one end of the explosion-proof valve (3) is arranged in the connecting block (5), and the other end extends out of the dust cover (6) and is connected to a pipeline; The connecting block (5) is a hollow structure with one end open. The connecting block (5) is provided with a first chamber (51), a second chamber (52), an oil outlet chamber (53) and an oil outlet port (54). The first chamber (51) is provided with a dust cover (6) at one end. The second chamber (52) is connected to the first chamber (51) at one end and to the oil outlet chamber (53) at the other end. The oil outlet port (54) is perpendicular to the oil outlet chamber (53). One end of the oil outlet port (54) penetrates the outer wall of the connecting block (5) and corresponds to the oil outlet hole on the hydraulic cylinder (1), and the other end is connected to the oil outlet chamber (53). The first chamber (51) and the second chamber (52) are compatible with the explosion-proof valve (3). The outer surface of the first chamber (51) is evenly distributed with a plurality of fixing holes. The fixing holes are provided with fixing bolts (8) for fastening the explosion-proof valve (3) in the connecting block (5).

2. The new type connection device for the hydraulic cylinder explosion-proof valve of the rolling mill water retaining plate according to claim 1 is characterized in that: The second chamber (52) is provided with an internal thread, and one end of the explosion-proof valve (3) is threadedly connected to the second chamber (52) of the connection block (5) via a double-thread joint.

3. The new type connection device for the hydraulic cylinder explosion-proof valve of the rolling mill water retaining plate according to claim 1 is characterized in that: A fluororubber circular sealing gasket (12) is also provided between the fixing bolt (8) and the outer surface of the connecting block (5); the fixing bolt (8) passes through the connecting block (5) and abuts against the surface of the explosion-proof valve (3) in the connecting block (5).

4. The new type connection device for the hydraulic cylinder explosion-proof valve of the rolling mill water retaining plate according to claim 1 is characterized in that: One side of the connection block (5) connected to the hydraulic cylinder (1) is concave to form a sealing groove, and an O-ring (7) is provided in the sealing groove.

5. The new type connection device for the hydraulic cylinder explosion-proof valve of the rolling mill water retaining plate according to claim 1 is characterized in that: The dust cover (6) is connected to the connecting block (5) by bolts (9); the connecting block (5) is provided with threaded holes (15) at four corners of one side of the first chamber (51) and at four corners of the dust cover (6), respectively; a hexagonal opening (61) is provided in the middle of the dust cover (6) to match the explosion-proof valve (3); a hexagonal sealing groove is provided around the hexagonal opening (61) on the inner side of the dust cover (6); a hexagonal dustproof pad (11) is provided in the hexagonal sealing groove; a dustproof sealing groove (14) is further provided on one side of the connecting block (5) where the threaded hole (15) is provided; a sealing ring (10) is provided in the dustproof sealing groove (14).

6. The new type connection device for the hydraulic cylinder explosion-proof valve of the rolling mill water retaining plate according to claim 1 is characterized in that: Hydraulic oil (13) is filled between the connecting device and an explosion-proof valve (3) arranged in the connecting device.

7. The new type connection device for the hydraulic cylinder explosion-proof valve of the rolling mill water retaining plate according to claim 1 is characterized in that: One end of the explosion-proof valve (3) extending out of the dust cover (6) is connected to a pipeline via a double-wire joint.

8. The new type connection device for the hydraulic cylinder explosion-proof valve of the rolling mill water retaining plate according to claim 1 is characterized in that: The cross section of the connecting block (5) is an L-shaped structure; one end of the connecting block (5) provided with a second chamber (52) is connected to the hydraulic cylinder (1); and a gap is left between one end of the connecting block (5) provided with a first chamber (51) and the hydraulic cylinder (1).

Images