Replaceable bearing bush structure applied to pumped storage power station

Abstract

The utility model provides a replaceable bearing bush structure applied to a pumped storage power station, which relates to the field of water inlet ball valves and comprises a valve body, a barrel opening is arranged on the outer wall of the valve body, a cylinder sleeve is arranged in the barrel opening, a bottom cover is arranged at one end of the barrel opening, a composite sleeve is arranged in the cylinder sleeve, and a packing gland is arranged at one end of the cylinder sleeve. And a plurality of fixing bolts are arranged on the packing gland. According to the utility model, the innovative replaceable bearing bush structure is adopted, so that great convenience is brought to maintenance work. And the cylinder sleeve is matched with the composite sleeve and adopts a bimetallic self-lubricating bearing, so that a packing pad, a packing piece and the like in the cylinder sleeve are easy to disassemble and replace. When the bearing bush needs to be replaced, a worker only needs to sequentially rotate and take down the external bolt and the fixing bolt, and then the bottom cover, the packing gland and related components in the cylinder sleeve can be easily taken out for replacement. In the actual maintenance scene of the pumped storage power station, the design greatly shortens the maintenance time and improves the maintenance efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to water inlet ball valve field especially, it relates to a kind of replaceable bearing bush structure applied to pumped storage power station. BACKGROUND

[0002] Among the key equipment of pumped storage power station, water inlet ball valve bears the important responsibility of controlling water flow and regulating flow, and its performance is directly related to the stability and safety of power station operation. With the increasing prominence of pumped storage power station in energy regulation field, the reliability and durability requirements of water inlet ball valve are increasingly stringent.

[0003] Although the existing water-filled pumped storage power station water inlet ball valve is designed to have a long service life, it faces many severe challenges in actual operation. The average number of opening and closing is much higher than that of general water inlet ball valves, and frequent opening and closing puts a lot of pressure on the sealing structure. During frequent operation, the sealing element is easily worn out, which gradually reduces the sealing performance and greatly affects the normal power generation and power supply stability of the power station. At the same time, the existing bearing bush structure has significant shortcomings in reliability and maintainability. As a key component supporting the rotation of the valve shaft, the bearing bush is easily damaged due to wear and fatigue under long-term high-load operation. However, the traditional bearing bush structure is complex and tightly connected with the valve body and other components, making it difficult to repair and replace. Once the bearing bush fails, maintenance personnel often need to spend a lot of time and effort to disassemble many related components before they can repair or replace the bearing bush. This not only significantly extends the downtime of the power station equipment, affects power generation efficiency, and increases operating costs, but also easily causes secondary damage to other components during the complex disassembly and installation process, further reducing the overall reliability and service life of the equipment.

[0004] Therefore, it is necessary to provide a new replaceable bearing bush structure applied to pumped storage power station to solve the above technical problems. SUMMARY

[0005] To solve the above technical problems, the utility model provides a replaceable bearing bush structure applied to pumped storage power station.

[0006] The replaceable bearing bush structure applied to pumped storage power station provided by the utility model includes a valve body, a cylinder port is provided on the outer wall of the valve body, a cylinder sleeve is provided inside the cylinder port, a bottom cover is provided at one end of the cylinder port, a composite sleeve is provided inside the cylinder sleeve, a packing gland is provided at one end position of the cylinder sleeve, and a plurality of fixing bolts are provided on the packing gland.

[0007] Preferably, one end of the cylinder liner is provided with an annular groove, the packing gland is arranged at the annular groove, a plurality of alignment openings are arranged on the packing gland, a plurality of the fixing bolts are arranged in the plurality of alignment openings respectively, a plurality of locking grooves are arranged on the side wall of the annular groove, and one end of the plurality of fixing bolts is threadedly connected with the plurality of locking grooves respectively.

[0008] Preferably, the inside of the cylinder liner is provided with a packing groove, one end of the packing groove is close to the composite sleeve, and the other end of the packing groove is close to the packing gland.

[0009] Preferably, the packing groove is provided with a packing pad at one end, the packing pad abuts against the composite sleeve, and the inside of the packing groove is provided with a plurality of packing pieces, the packing pieces are arranged between the packing gland and the packing pad.

[0010] Preferably, the other end of the cylinder liner is provided with an installation groove on the inner wall, and the installation groove is provided with a sand baffle.

[0011] Preferably, the bottom sealing ring is arranged between the bottom cover and the cylinder liner.

[0012] Preferably, the bottom cover is provided with a plurality of installation openings, the cylinder liner is provided with a plurality of through openings at the port, the valve body is provided with a plurality of fastening openings at the port, a plurality of external bolts are arranged in the plurality of installation openings and are connected with the plurality of through openings in a sliding mode, and one end of the plurality of external bolts is threadedly connected with the plurality of fastening openings.

[0013] Compared with the related art, the replaceable bearing bush structure applied to the pumped storage power station has the following beneficial effects:

[0014] 1、The replaceable bearing bush structure brings great convenience to maintenance work.

[0015] 2, the utility model discloses a sealing structure is carefully designed, and the sealing performance and long-term use stability of device are improved obviously. The sand circle made of high-quality rubber is closely installed in the installation groove in the cylinder sleeve, effectively blocks the water and sand between the valve shaft and the cylinder sleeve, prevents the impurities from eroding and affecting the sealing effect. At the same time, the bottom cover sealing ring is installed between the bottom cover and the cylinder sleeve, and a plurality of packing pieces are arranged between the packing cover and the packing pad, and the multiple sealing design ensures that the sealing property of each connecting part of the device is good. Under the complex operation environment of the pumped storage power station, even if the water inlet ball valve is switched frequently, the sealing structure can effectively prevent leakage, ensure the stable operation of the equipment, greatly prolong the overall service life of the device, and reduce the equipment failure and maintenance cost caused by leakage. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The structure schematic view of a preferred embodiment provided by the utility model is shown in the drawing.

[0017] Figure 2 The structure schematic view of the cylinder sleeve shown in the drawing is shown in the drawing. Figure 1

[0018] The structure schematic view of A shown in the drawing is shown in the drawing. Figure 3 Figure 1 The reference numerals in the drawing are as follows: 1, valve body; 2, cylinder sleeve; 3, bottom cover; 4, composite sleeve; 41, packing cover; 42, fixing bolt; 5, packing pad; 51, packing piece; 6, installation groove; 61, sand circle; 7, bottom sealing ring; 8, mounting port; 81, through port; 82, fastening port; 9, external bolt. DETAILED DESCRIPTION

[0019] The utility model will be further explained in connection with the drawings and embodiments.

[0020] Please refer to the drawings and embodiments.

[0021] The replaceable bearing structure applied to the pumped storage power station includes a valve body 1, a cylinder sleeve 2, a bottom cover 3, a composite sleeve 4, a packing cover 41 and a plurality of fixing bolts 42. Figures 1 to 3 In the specific implementation process, as shown in the drawings, the one end position of the cylinder sleeve 2 is provided with an annular slot, the packing cover 41 is arranged at the annular slot, the packing cover 41 is provided with a plurality of alignment ports, the plurality of fixing bolts 42 are respectively arranged in the plurality of alignment ports, the sidewall of the annular slot is provided with a plurality of locking grooves, and one end of the plurality of fixing bolts 42 is respectively threadedly connected with the plurality of locking grooves.

[0022] Figure 1 Figure 3

[0023] ​​​​It should be noted that the cylinder liner 2 is selected from the same material as the valve body 1, which is generally large alloy cast steel ZG20Mn, as a fixed part;

[0024] The composite sleeve 4 is selected from FZ-6 bimetallic self-lubricating bearing. Its carrying capacity, self-lubrication, friction reduction and wear resistance are better than those of ordinary composite sleeves, and it is more suitable for long-term use;

[0025] Rotate the plurality of fixing bolts 42, so that the packing gland 41 is removed, and the packing gasket 5 and the packing part 51 inside the cylinder liner 2 are directly taken out, so that the staff can directly replace them later.

[0026] Reference Figure 3 As shown, the inside of the cylinder liner 2 is provided with a packing groove, one end of the packing groove is close to the composite sleeve 4, and the other end of the packing groove is close to the packing gland 41.

[0027] It should be noted that the packing gland 41 can ensure that the composite sleeve 4 is stably installed between the packing material.

[0028] Reference Figure 1 And Figure 3 As shown, the one end of the packing groove is provided with a packing gasket 5, the packing gasket 5 abuts against the composite sleeve 4, and the inside of the packing groove is provided with a plurality of packing parts 51, the packing parts 51 are arranged between the packing gland 41 and the packing gasket 5.

[0029] It should be noted that the packing parts 51 installed between the packing gland 41 and the packing gasket 5 can ensure that the composite sleeve 4 and the packing gland 41 maintain stable pressure, and the packing gasket 5 and the packing parts 51 can ensure better sealing effect.

[0030] Reference Figure 1 And Figure 2 As shown, the other end of the cylinder liner 2 is provided with an installation groove 6 on the inner wall, and the installation groove 6 is provided with a sand baffle 61.

[0031] It should be noted that the sand baffle 61 is selected from high-quality rubber to avoid water and sand entering between the valve shaft and the cylinder liner 2.

[0032] Reference Figure 1 And Figure 3 As shown, the bottom cover 3 and the cylinder liner 2 are connected by a bottom sealing ring 7.

[0033] It should be noted that the bottom sealing ring 7 is arranged to make the sealing effect between the bottom cover 3 and the cylinder liner 2 better.

[0034] Reference Figure 1 And Figure 3As shown, the bottom cover 3 is provided with a plurality of mounting ports 8, the port of the cylinder sleeve 2 is provided with a plurality of through ports 81, the port of the valve body 1 is provided with a plurality of fastening ports 82, the plurality of mounting ports 8 are connected with the external bolts 9, the plurality of external bolts 9 are respectively connected with the plurality of through ports 81 in a sliding mode, and one end of the plurality of external bolts 9 is respectively connected with the plurality of fastening ports 82 in a threaded mode.

[0035] It should be noted that when the bearing bush needs to be replaced, the plurality of external bolts 9 are sequentially removed, the bottom cover 3 and the bottom sealing ring 7 are directly removed, and further replacement and disassembly can be directly performed.

[0036] The working principle of the replaceable bearing bush structure applied to the pumped storage power station is as follows: when the bearing bush needs to be replaced, the plurality of external bolts 9 are sequentially removed, the bottom cover 3 and the bottom sealing ring 7 are directly removed, the plurality of fixing bolts 42 are then rotated, the packing gland 41 is removed, the packing pad 5, the packing piece 51 and the composite sleeve 4 in the cylinder sleeve 2 are directly removed, and the subsequent replacement of the staff can be directly performed.

[0037] The above is only an embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structure or equivalent process transformation according to the content of the utility model specification and drawings, or direct or indirect application in other related technical fields, is also included in the patent protection range of the utility model.

Claims

1. A replaceable bearing structure for use in pumped storage power stations, characterized in that, include: The valve body (1) has a cylindrical opening on its outer wall, a cylinder sleeve (2) inside the cylindrical opening, a bottom cover (3) at one end of the cylindrical opening, a composite sleeve (4) inside the cylinder sleeve (2), a packing gland (41) at one end of the cylinder sleeve (2), and multiple fixing bolts (42) on the packing gland (41).

2. The replaceable bearing structure for pumped storage power stations according to claim 1, characterized in that, The cylinder liner (2) has an annular groove at one end, the packing gland (41) is located at the annular groove, the packing gland (41) has multiple alignment ports, the multiple fixing bolts (42) are respectively located in the multiple alignment ports, the side wall of the annular groove has multiple locking grooves, and one end of the multiple fixing bolts (42) is threadedly connected to the multiple locking grooves respectively.

3. The replaceable bearing structure for pumped storage power stations according to claim 1, characterized in that, The cylinder liner (2) has a packing groove inside. One end of the packing groove is close to the composite sleeve (4), and the other end of the packing groove is close to the packing gland (41).

4. A replaceable bearing structure for pumped storage power stations according to claim 3, characterized in that, A packing pad (5) is provided at one end of the packing groove. The packing pad (5) abuts against the composite sleeve (4). Multiple packing components (51) are provided inside the packing groove. The packing components (51) are located between the packing gland (41) and the packing pad (5).

5. A replaceable bearing structure for pumped storage power stations according to claim 1, characterized in that, The cylinder liner (2) has an installation groove (6) on the inner wall of the other end, and a sand baffle (61) is provided inside the installation groove (6).

6. A replaceable bearing structure for a pumped storage power station according to claim 1, characterized in that, A bottom sealing ring (7) is installed between the bottom cover (3) and the cylinder liner (2).

7. A replaceable bearing structure for pumped storage power stations according to claim 1, characterized in that, The bottom cover (3) is provided with multiple mounting ports (8), the cylinder liner (2) is provided with multiple through ports (81), the valve body (1) is provided with multiple fastening ports (82), and external bolts (9) are installed and connected in each of the multiple mounting ports (8). The multiple external bolts (9) are slidably connected to the multiple through ports (81), and one end of the multiple external bolts (9) is threadedly connected to the multiple fastening ports (82).

Images