Oil supply device capable of conveniently overhauling vertical leakage-free screw pump

Abstract

The utility model discloses an oil supply device convenient for overhauling vertical type leakage-free screw pumps. The oil supply device comprises two vertical type leakage-free screw pumps, each vertical leakage-free screw pump is vertically inserted into the oil tank; an oil suction filter is arranged at an inlet of each vertical non-leakage screw pump; each vertical leakage-free screw pump is driven by a motor arranged at the top of the oil tank; an oil outlet pipe is vertically arranged on each vertical leakage-free screw pump; the oil outlet pipe and the oil outlet tank are folded outwards to be horizontal and then communicated with the horizontal pipe through the overhaul flange. The horizontal pipe is communicated with a header pipe at a high position through a tee joint; an oil pump outlet check valve is arranged on the horizontal pipe; according to the utility model, the maintenance stop valve and the maintenance flange are arranged, so that the vertical non-leakage screw pump is convenient to disassemble; meanwhile, due to the arrangement of the pipelines, the detached vertical leakage-free screw pump cannot interfere with the pipelines when being hoisted out of the oil tank, and the operation is very convenient; according to the utility model, follow-up maintenance is facilitated, and the purpose of online maintenance at any time is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field related to an oil supply device for a lubricating bearing of a turbine expander, and in particular relates to an oil supply device for a vertical non-leaking screw pump which is convenient for maintenance. Background Art

[0002] As a key supporting core unit in air separation equipment, the performance of the turbine expander directly determines the technical level of the entire set of products; At present, most expanders are lubricated with oil bearings. According to the requirements of the complete set of equipment, the expander must meet the requirements of continuous and stable operation for at least one year, so a set of continuous and stable oil supply device is required. The existing oil supply device is generally equipped with two pumps. When a gear pump or a horizontal screw pump is used, it is easy to leak because the coupling is directly exposed to the atmosphere. If the leakage becomes larger, the screw pump needs to be repaired and the sealing sleeve needs to be replaced; When a vertical screw pump is used, the pump head, mechanical seal and coupling of the vertical screw pump are all built into the oil tank, so there will be no leakage of lubricating oil. Due to space and cost considerations, only a welded check valve is generally configured at its outlet, and the outlet pipeline blocks the bottom plate disassembly space of the screw pump. When the oil pump or the oil suction filter fails, the pipeline cannot be disassembled for maintenance, which poses a hidden danger to the continuous operation of the expander and even affects the user's acceptance of the equipment.

[0003] As attached Figure 1-3As shown, Chinese patent: ZL2020208575099, a leak-proof oil supply device for an oil pump for a turbine expander discloses an expander oil supply device, each of which is equipped with two vertical leak-proof screw pumps 1, one for use and one for backup, and the inlet pipeline of each vertical leak-proof screw pump 1 is equipped with an oil suction filter 8, which is directly screwed on the oil pump body of the vertical leak-proof screw pump 1 with a thread, and when the outlet piping of the vertical leak-proof screw pump 1 is arranged, in order to avoid leakage, the oil pump outlet check valve 9 adopts a plug-in welding structure; in order to simplify the pipeline and save costs, the oil outlet pipe 7 of each vertical leak-proof screw pump 1 is vertically arranged and is in the same vertical plane with the main pipe 10, and is connected to the main pipe 10 through a horizontal pipe (not marked) between the top of the oil outlet pipe 7 and the main pipe 10, and only one welded oil pump outlet is arranged on the horizontal pipe. At the outlet check valve 9; if according to the above design, the oil pump outlet check valve 9 is welded to the pipeline, the vertical non-leakage screw pump 1 cannot be disassembled for maintenance, which will bring hidden dangers to the stable and continuous operation of the expander; at present, the connecting end face of the motor 2 that drives the oil pump is directly rigidly connected to the bottom plate end face of the oil pump outlet check valve 9, which easily causes the oil fume and gas of the oil tank 3 to leak out; the inlet oil suction filter 8 of the vertical non-leakage screw pump 1 is placed in the oil tank 3 and also needs to be inspected regularly. During the inspection, the vertical non-leakage screw pump 1 must be lifted from the oil tank 3 before the use of the oil suction filter 8 can be checked. Since the outlet pipeline blocks the disassembly space of the bottom plate of the vertical non-leakage screw pump 1, the vertical non-leakage screw pump 1 and the oil suction filter 8 cannot be disassembled and repaired separately.

[0004] To this end, we have developed an oil supply device for the vertical, leak-free screw pump that is easy to maintain. Summary of the invention

[0005] The utility model aims to provide an oil supply device for a vertical non-leaking screw pump which is convenient for maintenance.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an oil supply device for convenient maintenance of a vertical non-leakage screw pump, comprising two vertical non-leakage screw pumps; each of the vertical non-leakage screw pumps is vertically inserted into an oil tank; an oil suction filter is respectively provided at the inlet of each of the vertical non-leakage screw pumps; each of the vertical non-leakage screw pumps is respectively driven by a motor arranged on the top of the oil tank; an oil outlet pipe is vertically provided on each vertical non-leakage screw pump; the oil outlet pipe is folded outwardly into a horizontal shape out of the oil tank, and then connected to the horizontal pipe through a maintenance flange; the horizontal pipe is then connected to a main pipe at a high place through a tee; an oil pump outlet check valve is provided on the horizontal pipe.

[0007] Preferably, the horizontal pipe is L-shaped and is arranged outside the oil outlet pipe.

[0008] Preferably, a maintenance stop valve and an oil pump outlet check valve are sequentially arranged on the horizontal pipe.

[0009] Preferably, a non-asbestos aramid rubber sheet is provided between the connection end face of the motor of the vertical non-leakage screw pump and the end face of the connection bottom plate of the vertical non-leakage screw pump, thereby ensuring the sealing and solving the problem of oil fume leakage.

[0010] Compared with the prior art, the utility model provides an oil supply device for a vertical non-leaking screw pump that is convenient for maintenance, and has the following beneficial effects:

[0011] The utility model facilitates the maintenance of the oil supply device of the vertical non-leakage screw pump by arranging a maintenance stop valve and a maintenance flange, so as to facilitate the disassembly of the vertical non-leakage screw pump; at the same time, the oil outlet pipe is folded outwardly into a horizontal shape out of the oil tank, and then connected with the horizontal pipe through the maintenance flange; the horizontal pipe is L-shaped and arranged on the outside of the oil outlet pipe, and the horizontal pipe is then connected with the main pipe at a high place through a tee; with such an arrangement, when the disassembled vertical non-leakage screw pump is lifted out of the oil tank, it will not interfere with the pipeline, which is very convenient; the utility model is convenient for subsequent maintenance to achieve the purpose of online maintenance at any time. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0013] Figure 1 It is a front view of the existing oil supply device;

[0014] Figure 2 It is a top view of the existing oil supply device;

[0015] Figure 3 A schematic diagram of a vertical non-leakage screw pump for an existing oil supply device;

[0016] Figure 4 This is a front view of an oil supply device for a vertical, leak-free screw pump that is convenient for maintenance and proposed by the utility model;

[0017] Figure 5 A top view of an oil supply device for a vertical, leak-free screw pump that is convenient for maintenance proposed by the utility model;

[0018] In the figure: 1. Vertical non-leakage screw pump; 2. Motor; 3. Oil tank; 7. Oil outlet pipe; 8. Oil suction filter; 9. Oil pump outlet check valve; 10. Main pipe; 11. Vertical non-leakage screw pump; 12. Motor; 13. Oil tank; 17. Oil outlet pipe; 18. Oil suction filter; 19. Oil pump outlet check valve; 20. Main pipe; 21. Maintenance stop valve; 22. Maintenance flange; 23. Horizontal pipe. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0020] See also Figure 4-5 The utility model provides a technical solution: an oil supply device for convenient maintenance of a vertical non-leakage screw pump, comprising two vertical non-leakage screw pumps 11, one for use and one for backup; each of the vertical non-leakage screw pumps 11 is vertically inserted into an oil tank 13; an oil suction filter 18 is respectively arranged at the inlet of each of the vertical non-leakage screw pumps 11; each of the vertical non-leakage screw pumps 11 is respectively driven by a motor 12 arranged on the top of the oil tank 13; an oil outlet pipe 17 is vertically arranged on each vertical non-leakage screw pump 11; the oil outlet pipe 17 is folded outwardly into a horizontal shape out of the oil tank 13, and then communicated with a horizontal pipe 23 through an inspection flange 22; the horizontal pipe 23 is L-shaped and arranged on the outside of the oil outlet pipe 17, and the horizontal pipe 23 is then connected to a main pipe 20 at a high place through a tee (not marked); an inspection stop valve 21 and an oil pump outlet check valve 19 are sequentially arranged on the horizontal pipe 23.

[0021] In this embodiment, a non-asbestos aramid rubber sheet (not shown) is provided between the connection end surface of the motor 12 of the vertical non-leakage screw pump 11 and the end surface of the connection bottom plate of the vertical non-leakage screw pump 11, thereby ensuring sealing and solving the problem of oil fume leakage.

[0022] When in use, the two vertical non-leakage screw pumps 11 are used with one in use and one in reserve; when one vertical non-leakage screw pump 11 fails to work normally, the other one is automatically started immediately to replace the failed vertical non-leakage screw pump 11 to ensure the continuous normal operation of the turbine expander; at the same time, the vertical non-leakage screw pump 11 that fails to work properly is immediately repaired to meet the requirement of having one in use and one in reserve at any time; during maintenance, the corresponding maintenance stop valve 21 can be closed first, and then the corresponding maintenance flange 22 can be loosened, and then the six bolts connecting the connecting bottom plate of the vertical non-leakage screw pump 11 and the oil tank can be disassembled, and the vertical non-leakage screw pump 11 that fails to work normally, the suction filter 18 and its matching motor can be hoisted out of the oil tank 13 together, and when hoisted out, it will not interfere with the pipeline, which is very convenient; after repair, it is installed, and the maintenance stop valve 21 is opened for standby; this can be repeated to ensure the continuous normal operation of the turbine expander, and the purpose of online maintenance at any time can be fully achieved.

[0023] Compared with the prior art, the utility model has the following beneficial effects:

[0024] The utility model facilitates the maintenance of the oil supply device of the vertical non-leakage screw pump by setting the maintenance stop valve 21 and the maintenance flange 22; it is convenient to disassemble the vertical non-leakage screw pump 11; at the same time, the oil outlet pipe 17 and the oil tank 13 are folded outwardly into a horizontal shape, and then connected with the horizontal pipe 23 through the maintenance flange 22; the horizontal pipe 23 is L-shaped and is arranged on the outside of the oil outlet pipe 17, and the horizontal pipe 23 is connected with the main pipe 20 at a high place through a tee (not marked); with such an arrangement, the vertical non-leakage screw pump 11 after disassembly can be hung When the oil is discharged from the oil tank 13, it will not interfere with the pipeline, which is very convenient; the utility model is convenient for subsequent maintenance, and can fully achieve the purpose of online maintenance at any time; the utility model can save a spare oil supply device by facilitating the maintenance of the oil supply device of the vertical non-leakage screw pump, and at least save about 80,000 yuan in expenses, and also save the corresponding land occupation and piping costs; it also completely solves the leakage of lubricating oil, and can recycle about 600 liters of lubricating oil a year, saving about 30,000 yuan, and achieving the purpose of energy conservation, emission reduction and environmental protection.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An oil supply device for convenient maintenance of a vertical non-leakage screw pump, comprising two vertical non-leakage screw pumps; each of the vertical non-leakage screw pumps is vertically inserted into an oil tank; an oil suction filter is provided at the inlet of each of the vertical non-leakage screw pumps; each of the vertical non-leakage screw pumps is driven by a motor provided at the top of the oil tank; an oil outlet pipe is vertically provided on each vertical non-leakage screw pump; characterized in that: The oil outlet pipe is folded outwardly from the oil tank into a horizontal shape, and then connected to the horizontal pipe through an inspection flange; the horizontal pipe is then connected to the main pipe at a high position through a tee; an oil pump outlet check valve is arranged on the horizontal pipe.

2. The oil supply device for a vertical screw pump that is easy to maintain and does not leak according to claim 1 is characterized in that: The horizontal pipe is L-shaped and is arranged outside the oil outlet pipe.

3. The oil supply device for a vertical screw pump that is easy to maintain and does not leak according to claim 1 is characterized in that: The horizontal pipe is provided with a maintenance stop valve and an oil pump outlet check valve in sequence.

4. The oil supply device for a vertical screw pump that is easy to maintain and does not leak according to claim 1 is characterized in that: A non-asbestos aramid rubber sheet is arranged between the connecting end face of the motor of the vertical non-leakage screw pump and the end face of the connecting bottom plate of the vertical non-leakage screw pump, thereby ensuring the sealing performance and solving the problem of oil fume and gas leakage.

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