Device suitable for avoiding oil gas leakage at oil filling port of reduction gearbox

Abstract

The utility model relates to the technical field of oil leakage prevention, and provides a device suitable for avoiding oil gas leakage at an oil filling port of a reduction gearbox, which comprises a hollow screw rod, a lower tray, an upper gland, a ventilation grating and a locking piece, the lower end of the hollow screw is detachably arranged on an oil filling port, the lower tray is of a circular truncated cone structure with the thin bottom and the thick top, the lower end of the lower tray is connected with the upper end of the hollow screw, a positioning piece is arranged in the middle of the lower tray, the locking piece penetrates through the positioning piece, and the upper end of the locking piece is connected with the upper gland. And the ventilating grid is arranged between the lower tray and the upper gland. On one hand, the oil-gas stroke is increased, the oil-gas temperature is reduced, on the other hand, the outlet area is increased, the ventilation effect of an outlet is ensured, no oil drop overflows, the hidden dangers in the aspects of equipment damage and personnel safety are avoided, the daily cleaning workload is reduced, the maintenance cost is reduced, and the oil-gas separation device has the advantage of being easy to maintain.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of oil leakage prevention, in particular to a device suitable for avoiding oil and gas dripping from the oil filling port of a reduction gearbox. BACKGROUND

[0002] In a coal-fired power plant boiler system, a rotary air preheater is an important component of the system, and a reduction gearbox is responsible for driving the rotary air preheater rotor to rotate to complete the heat transfer of flue gas waste heat to primary / secondary air, which is an important auxiliary machine of the boiler system.

[0003] The oil filling port at the top of the reduction gearbox (model SGW29-100) is not only an oil port for filling gear oil, but also a vent hole for air permeation and pressure balance. However, the oil filling port of the reduction gearbox has been plagued by dripping. The installation position of the air preheater reduction gearbox is close to the air preheater body, and during operation, it is affected by the radiant heat of the air preheater body and the heat generated by the friction of the rotating parts inside the gearbox. The gear oil in the reduction gearbox is heated to produce oil gas. After the hot oil gas contacts the external air at the oil filling port, it condenses into oil droplets and drips onto the reduction gearbox housing. Excessive dripping can cause rapid lubricating oil consumption and affect the safety of equipment operation and the cleanliness of the site. After the arrival of summer, the temperature rises, which exacerbates the dripping of the equipment, leading to an increase in maintenance costs, and potential equipment damage and safety hazards for workers. SUMMARY

[0004] In view of the defects in the prior art, the purpose of the utility model is to provide a device suitable for avoiding oil and gas dripping from the oil filling port of a reduction gearbox.

[0005] According to the device suitable for avoiding oil and gas dripping from the oil filling port of a reduction gearbox, a hollow screw rod, a lower tray, an upper cover, a ventilation grille, and a locking piece are included.

[0006] The lower end of the hollow screw rod is detachably arranged on the oil filling port. The lower tray has a circular table structure with a thin bottom and a thick top. The lower end of the lower tray is connected to the upper end of the hollow screw rod. The middle part of the lower tray has a positioning piece. The locking piece penetrates the positioning piece and is connected to the upper cover at the upper end. The ventilation grille is arranged between the lower tray and the upper cover.

[0007] Preferably, the locking piece includes a locking bolt and a nut.

[0008] The middle part of the positioning piece has a first through hole. The lower end of the locking bolt is a locking head. The locking head is located below the positioning piece, and the first through hole does not allow the locking head to pass through. The upper end of the locking bolt penetrates the upper cover and extends above the upper cover to connect the nut.

[0009] Preferably, the air-permeable grille is in a cylindrical structure.

[0010] Preferably, the air-permeable grille comprises an outer grille layer and an inner oil absorption layer.

[0011] The oil absorption layer is detachably covered on the inner side of the grille layer.

[0012] Preferably, the oil absorption layer adopts oil absorption felt, and the grille layer is densely provided with air-permeable holes in the circumferential direction.

[0013] Preferably, the grille layer is made of glass fiber reinforced plastic or plastic material.

[0014] Preferably, the hollow screw is provided with external threads at both ends, the lower end is threadedly connected with an oil injection port, and the lower end of the lower tray is provided with an internal threaded hole matched with the external threads of the upper end of the hollow screw.

[0015] Preferably, the upper end of the lower tray is a seat body, the seat body is provided with a first edge extending upward, and the first edge is inclined in the radial outward direction.

[0016] Preferably, the upper pressing cover is provided with a second edge extending downward in the circumferential direction, and the overall structure is in the shape of a hat.

[0017] Preferably, the center of the upper pressing cover is provided with a second through hole for the top end of a locking bolt to pass through.

[0018] Compared with the prior art, the utility model has the beneficial effects that:

[0019] The utility model discloses a hollow screw is cooperated with the air-permeable grille fixed in the upper direction, on one hand, the oil gas stroke is increased, the oil gas temperature is reduced, on the other hand, the outlet area is increased, the outlet air-permeable effect is ensured, the oil droplet condensation effect is good, makes the oil droplet reflux to the inside of the reduction gearbox through the hollow screw after the oil droplet of condensation is gathered through the lower tray, and the oil droplet is not overflowed, avoids the hidden danger of equipment damage and personnel safety, reduces the daily cleaning workload, reduces the maintenance cost, and has the advantages of simple maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0020] Other features, objects and advantages of the utility model will become more apparent through reading the following detailed description of non-restrictive embodiments with reference to the accompanying drawings:

[0021] Figure 1 It is the front structure schematic view of the utility model;

[0022] Figure 2 It is the cross section side schematic view of the seat body of the lower tray upper end.

[0023] In the drawing, it is shown that:

[0024] Hollow screw 1

[0025] Lower tray 2

[0026] Positioning sheet 21

[0027] Upper cover 3

[0028] Breathable grid 4

[0029] Grid layer 41

[0030] Oil absorption layer 42

[0031] Locking piece 5

[0032] Nut 51

[0033] Locking bolt 52 DETAILED DESCRIPTION

[0034] The utility model will be described in detail below in combination with specific embodiments. The following embodiments will help the person skilled in the art to further understand the utility model, but do not limit the utility model in any form. It should be pointed out that, for those skilled in the art, without departing from the concept of the utility model, a number of changes and improvements can be made. These all belong to the protection scope of the utility model.

[0035] The utility model provides a device suitable for avoiding oil and gas dripping of reduction gearbox oil filling port, as shown in Figure 1 The lower end of the hollow screw 1 is detachably arranged on the oil filling port, the lower end of the lower tray 2 is connected to the upper end of the hollow screw 1, the lower tray 2 is a circular table shape structure with thin bottom and thick top, the middle part of the lower tray 2 is provided with the positioning sheet 21, the locking piece 5 penetrates the positioning sheet 21 and is connected to the upper cover 3 at the upper end, and the breathable grid 4 is arranged between the lower tray 2 and the upper cover 3.

[0036] Specifically, the locking piece 5 includes the locking bolt 52 and the nut 51, the middle part of the positioning sheet 21 is provided with a first through hole, the first through hole is used for the locking bolt 52 to pass through, which is convenient for assembly, the lower end of the locking bolt 52 is a locking head, the locking head is located below the positioning sheet 21 after assembly, and the first through hole does not allow the locking head to pass through, the upper end of the locking bolt 52 penetrates the upper cover 3 and extends above the upper cover 3 to be connected to the nut 51, and the upper cover 3 is tightly fixed above the breathable grid 4 by screwing the nut 51, so that the stability of the fixed breathable grid 4 is ensured.

[0037] As Figure 1As shown, the air grating 4 is in a cylindrical structure, including an outer grating layer 41 and an inner oil absorption layer 42 which is detachably covered on the inner side of the grating layer 41, and the oil absorption layer 42 is preferably made of oil absorption felt, and the grating layer 41 is densely provided with air holes in the circumferential direction, and the grating layer 41 can be made of glass fiber reinforced plastic, plastic or the like, and the air grating 4 is used to increase the outlet area, and the oil absorption felt is additionally arranged on the inner wall to absorb and filter the oil gas, thereby effectively preventing the oil droplets from overflowing.

[0038] As shown in the drawings, Figure 1 The lower end of the hollow screw 1 is threadedly connected with the oil inlet, which is convenient to disassemble and easy to seal, and the lower end of the lower tray 2 has an internal threaded hole matched with the external thread of the upper end of the hollow screw 1, and the lower end of the lower tray 2 is connected with the upper end of the hollow screw 1 through the internal threaded hole and the external thread of the upper end of the hollow screw 1, which is simple to assemble, and the hollow screw 1 plays a role of overall support, and since the hollow screw 1 is in a hollow structure, the oil gas can enter the air grating 4 through the hollow screw 1.

[0039] The upper end of the lower tray 2 is a seat body, as shown in the drawings, Figure 2 The seat body has a first edge extending upward, and the first edge is inclined in the radial outward direction, so that the air grating 4 can be quickly positioned during assembly, and the upper pressing cover 3 is preferably provided with a second edge extending downward, and the whole forms a hat structure, which can be quickly buckled on the top of the air grating 4, and the design of the first edge and the second edge greatly increases the efficiency and precision of assembly, and the center of the upper pressing cover 3 is provided with a second through hole for the top end of the locking bolt 52 to pass through, and the whole structure is convenient to disassemble, simple to assemble and convenient to use.

[0040] The utility model discloses a hollow screw 1 is used to cooperate with the air grating 4 fixed in the upper portion to increase the outlet area, ensure the outlet air permeation effect, increase the oil gas stroke, reduce the oil gas temperature, reduce the oil gas amount at the outlet, the air grating 4 is internally provided with oil absorption felt, increases the adsorption effect, makes the oil droplets that condense gather through the lower tray 2 at the bottom and can make the oil droplets backflow to the inside of the reduction gearbox through the hollow screw 1, and no oil droplets overflow, and the oil absorption felt can be replaced regularly, thereby reducing the daily cleaning workload, and the utility model has the advantages of simple maintenance.

[0041] The working principle of the utility model is as follows:

[0042] The setting rod of the hollow screw 1 raises the height of the oil inlet, oil gas from the oil inlet increases the oil gas stroke, reduces the oil gas temperature, reduces the oil gas amount at the outlet, and after the oil gas enters the air vent grille 4, the outlet area is increased, ensuring the air vent effect of the outlet; the oil absorption felt is additionally arranged on the inner wall of the air vent grille 4 to absorb and filter oil gas; the oil drops filtered by the absorption and filtration are collected by the lower tray 2 and flow back to the reduction gearbox, effectively avoiding the phenomenon of oil drop overflow.

[0043] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and 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 particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0044] The specific embodiments of the present application are described above. It should be understood that the present application is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essential content of the present application. The embodiments of the present application and the features in the embodiments can be arbitrarily combined without conflict.

Claims

1. A device suitable for avoiding oil and gas dripping from the oil filler of a reduction gearbox, characterized in that, The hollow screw (1), the lower tray (2), the upper cover (3), the air-permeable grille (4) and the locking piece (5) are included. The lower end of the hollow screw (1) is detachably arranged on the oil inlet, the lower tray (2) is a circular table structure with a thin bottom and a thick top, the lower end of the lower tray (2) is connected to the upper end of the hollow screw (1), the middle part of the lower tray (2) has a positioning piece (21), the locking piece (5) penetrates the positioning piece (21) and is connected to the upper cover (3) at the upper end, and the air-permeable grille (4) is arranged between the lower tray (2) and the upper cover (3).

2. The device for avoiding oil and gas dripping from the oil filler of the reduction gearbox according to claim 1, characterized in that, The locking piece (5) includes a locking bolt (52) and a nut (51). The middle part of the positioning piece (21) has a first through hole, the lower end of the locking bolt (52) is a locking head, the locking head is located below the positioning piece (21), and the first through hole does not allow the locking head to pass through, the upper end of the locking bolt (52) penetrates the upper cover (3) and extends above the upper cover (3) to be connected to the nut (51).

3. The device as claimed in claim 1, wherein, The air-permeable grille (4) has a cylindrical structure.

4. The device as claimed in claim 1 adapted to avoid oil and gas dripping from the filler neck of the reduction gearbox, characterized in that, The air-permeable grille (4) includes an external grille layer (41) and an internal oil absorption layer (42). The oil absorption layer (42) is detachably covered on the inner side of the grille layer (41).

5. The device as claimed in claim 4, wherein, The oil absorption layer (42) uses oil absorption felt, and the grille layer (41) is circumferentially densely provided with air-permeable holes.

6. The device as claimed in claim 4, wherein, The grille layer (41) can be made of glass fiber reinforced plastic or plastic material.

7. The device as claimed in claim 1, wherein, Both ends of the hollow screw (1) are provided with external threads, the lower end is threadedly connected with the oil inlet, and the lower end of the lower tray (2) has an internal threaded hole matched with the external threads of the upper end of the hollow screw (1).

8. The device as claimed in claim 1, wherein, The upper end of the lower tray (2) is a seat body, the seat body has a first edge extending upward, and the first edge is inclined in a radially outward direction.

9. The device as claimed in claim 1, wherein, The upper cover (3) is circumferentially provided with a second edge extending downward, and has a hat structure as a whole.

10. The device for avoiding oil and gas dripping from the oil filler of a reduction gearbox according to claim 1, characterized in that, The center of the upper cover (3) is provided with a second through hole for the top end of the locking bolt (52) to pass through.

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