CN213711853U

CN213711853U - Compress tightly subassembly, plugging device and EH oil system

Info

Publication number: CN213711853U
Application number: CN202022285745.0U
Authority: CN
Inventors: 吴红斌
Original assignee: Baotou Second Thermal Power Plant North United Power Corp
Current assignee: Baotou Second Thermal Power Plant North United Power Corp
Priority date: 2020-10-14
Filing date: 2020-10-14
Publication date: 2021-07-16
Anticipated expiration: 2030-10-14

Abstract

The utility model provides a compress tightly subassembly, plugging device and EH oil system relates to thermal power generating unit and maintains technical field. The pressing assembly comprises a pressing sleeve and an adjusting rod, wherein one end of the pressing sleeve is provided with a groove, the groove is used for accommodating a protruding head of a plug, and the other end of the pressing sleeve is provided with a threaded hole; the adjusting rod comprises a thread section, and the thread section is screwed in the thread hole. The plugging device comprises a sealing ring and the pressing component, wherein the inner diameter of the sealing ring is smaller than the outer diameter of the protruding head of the plug; when the sealing ring is sleeved on the convex head, the inner diameter of the groove in the pressing assembly is smaller than the outer diameter of the sealing ring. The EH oil system comprises an EH oil module, a propping base and the plugging device, wherein a sealing ring sleeve of the plugging device is arranged on a convex head of a screwed plug, a pressing sleeve is covered with the convex head and props against the sealing ring, and an adjusting rod is propped against the propping base. This compress tightly subassembly can compress tightly the sealing washer of EH oil module leakage department for EH oil system's the maintenance convenience is high and with low costs.

Description

Compress tightly subassembly, plugging device and EH oil system

Technical Field

The utility model relates to a thermal power generating unit maintains technical field, particularly, relates to a compress tightly subassembly, plugging device and EH oil system.

Background

The steam turbine is the main equipment of modern thermal power factory, and wherein, EH oil system is as the important auxiliary system of steam turbine, uses high-pressure fire resistant oil as fluid working medium, provides power oil for each actuating mechanism and safety part. Orifices such as a fabrication hole, a check valve and the like in the EH oil system are generally blocked by using screw plugs, however, because the oil pressure in the EH oil system is high, the blocking position of the orifice is easy to leak, after the fuel leaks, equipment can be stopped to replace sealing rings in the screw plugs, however, the operation can influence the continuous operation of a unit and the shutdown of a steam turbine can cause great economic loss; if the continuous operation of the steam turbine is required to be maintained, oil needs to be continuously supplemented to the EH oil system to ensure the oil level for the normal operation of the steam turbine, however, the operation increases the fuel cost and the operation of the steam turbine has safety hazards.

Namely, the existing EH oil system has high maintenance difficulty after leakage occurs at the orifice plugging part, and the existing maintenance operation can cause great economic loss.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a compress tightly subassembly, plugging device and EH oil system to it is big to solve the current EH oil system mesopore mouth shutoff department and take place to leak the back maintenance degree of difficulty, and current maintenance operation can cause great economic loss's technical problem.

In order to solve the problems, the utility model provides a pressing assembly, which comprises a pressing sleeve and an adjusting rod, wherein one end of the pressing sleeve is provided with a groove for accommodating a protruding head of a plug, and the other end of the pressing sleeve is provided with a threaded hole; the adjusting rod comprises a thread section, and the thread section is screwed in the thread hole.

Optionally, the notched end of the groove is provided with an outwardly flared section along its circumference.

Optionally, the adjusting rod further comprises a top abutting section, the top abutting section is fixedly connected to one end, deviating from the pressing sleeve, of the thread section, and the top abutting section is conical.

Optionally, the adjusting rod further comprises a clamping section, the clamping section is connected between the threaded section and the abutting section, and the outer wall surface of the clamping section comprises two clamping planes which are oppositely arranged.

Optionally, the threaded section, the abutting section and the clamping section are integrally formed.

Optionally, the difference between the inner diameter of the groove and the outer diameter of the corresponding protruding head ranges from 0.6mm to 1.0 mm.

Optionally, the recess is coaxial with the threaded bore.

The utility model also provides a plugging device, which comprises a sealing ring and the pressing component, wherein the inner diameter of the sealing ring is smaller than the outer diameter of the convex head of the plug; when the sealing ring is sleeved on the convex head, the inner diameter of the groove in the pressing assembly is smaller than the outer diameter of the sealing ring.

Optionally, the difference between the inner diameter of the sealing ring and the outer diameter of the protruding head ranges from 0.4mm to 0.6 mm.

The utility model also provides a EH oil system, include EH oil module, support footstock and above-mentioned plugging device, the drill way shutoff of EH oil module has the plug, plugging device's sealing washer cover is located the bellying head of plug, the compressing tightly of compressing tightly the subassembly among the plugging device overlaps and establishes the bellying head just supports and presses the sealing washer, compress tightly the regulation pole butt of subassembly the footstock is supported.

The utility model provides a compress tightly subassembly, plugging device and EH oil system, when plug and drill way junction leak, can locate the protruding head with the sealing washer along circumference cover, can overlap recess one end cover of compressing tightly the cover on the protruding head, the protruding head inserts in the recess, the notch terminal surface of recess then compresses tightly the sealing washer towards EH oil module; rotate the regulation pole afterwards, connect in the degree of depth of threaded hole soon through adjusting the screw thread section, thereby adjust the length that the regulation pole stretches out the pressing sleeve, and then adjust both component whole lengths that compress tightly the subassembly, one end butt that deviates from the pressing sleeve until adjusting the pole is in supporting the footstock, continue to rotate the regulation pole, it compresses tightly to it towards the sealing washer removal under adjusting the pole pushing action to compress tightly the cover, the sealing washer receives the extrusion deformation to closely seal up plug and the junction in drill way, thereby realize the shutoff to plug oil leak department, the maintenance simple operation, and need not in succession to EH oil module mend oil, also need not to stop in order to realize the continuous operation of steam turbine, and then greatly reduced EH oil system later maintenance's cost.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic cross-sectional view of a compression sleeve in a compression assembly provided by the present invention;

fig. 2 is a schematic perspective view of an adjusting rod in the pressing assembly according to the present invention;

fig. 3 is a schematic cross-sectional view of an adjusting rod in the pressing assembly provided by the present invention;

fig. 4 is a schematic cross-sectional view of the screw thread connection between the pressing sleeve and the adjusting rod in the pressing assembly provided by the present invention;

fig. 5 is a schematic view of a first viewing angle when a plug is plugged in an orifice of an EH oil module in an EH oil system according to the present invention;

fig. 6 is a schematic diagram of the plugging device and the protruding head of the plug in the EH oil system according to the present invention, wherein the adjusting rod is not abutted against the abutting base;

fig. 7 is the utility model provides a plugging device compresses tightly the schematic view with the protruding head's of plug cooperation among the EH oil system, wherein, adjusts the pole and supports the footstock butt.

Description of reference numerals:

100-pressing sleeve; 110-a groove; 111-a flared section; 120-a threaded hole; 200-adjusting rod; 210-a thread segment; 220-a clamping section; 221-clamping plane; 230-a top-abutting section; 300-plugging; 310-a convex head; 400-sealing ring; 500-a top-supporting seat; 600-EH oil module.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The embodiment provides a pressing assembly, as shown in fig. 1-4, comprising a pressing sleeve 100 and an adjusting rod 200, wherein one end of the pressing sleeve 100 is provided with a groove 110, the groove 110 is used for accommodating a protruding head 310 of a plug 300, and the other end of the pressing sleeve 100 is provided with a threaded hole 120; the adjustment lever 200 includes a threaded section 210, and the threaded section 210 is threadedly coupled to the threaded hole 120.

The present embodiment further provides an occlusion device, as shown in fig. 6 and 7, comprising a sealing ring 400 and the above-mentioned compression assembly, wherein the inner diameter of the sealing ring 400 is smaller than the outer diameter of the protruding head 310 of the plug 300; when the sealing ring 400 is sleeved on the protruding head 310, the inner diameter of the groove 110 in the pressing assembly is smaller than the outer diameter of the sealing ring 400.

The embodiment further provides an EH oil system, as shown in fig. 5 to 7, including an EH oil module 600, a propping base 500, and the plugging device, where an orifice of the EH oil module 600 is plugged with a plug 300, a sealing ring 400 of the plugging device is sleeved on a protruding head 310 of the plug 300, a pressing sleeve 100 of a pressing assembly in the plugging device covers the protruding head 310, an adjusting rod 200 is abutted against the propping base 500, and the sealing ring 400 is sandwiched between the EH oil module 600 and the pressing sleeve 100.

The compressing assembly, the plugging device and the EH oil system provided by the embodiment are characterized in that the compressing assembly comprises a compressing sleeve 100 screwed in a threaded manner and an adjusting rod 200, and the compressing sleeve 100 and the adjusting rod are screwed in a threaded manner to adjust the overall length by adjusting the screwing depth of the threads; the plugging device comprises a sealing ring 400 which is sleeved on a convex head 310 of the plug 300 to seal the connection part of the plug 300 and the orifice of the EH oil module 600, and a pressing component which is used for pressing the sealing ring 400; the EH oil system comprises an EH oil module 600 for providing power oil for each actuating mechanism in the steam turbine, the plugging component and a propping seat 500 for propping the outer end of the plugging component.

Initially, in the EH oil system, as shown in fig. 5, the orifice such as the fabrication hole of the EH oil module 600 is plugged with the plug 300, and the protruding head 310 of the plug 300 protrudes outward, and the abutting base 500 and the protruding head 310 are arranged opposite to each other at an interval; the adjusting rod 200 of the compressing assembly is screwed in the threaded hole 120 of the compressing sleeve 100. When the connection between the plug 300 and the orifice leaks, the sealing ring 400 may be circumferentially sleeved on the protruding head 310, wherein an inner diameter of the sealing ring 400 is smaller than an outer diameter of the protruding head 310, and the sealing ring 400 is elastically opened when being sleeved on the protruding head 310, so as to improve the firmness of the sealing ring 400 sleeved on the protruding head 310 and improve the compression sealing performance of the sealing ring 400 on the protruding head 310, specifically, a difference between the inner diameter of the sealing ring 400 and the outer diameter of the protruding head 310 may be 0.4mm to 0.6mm, and preferably, a difference between the inner diameter of the sealing ring 400 and the outer diameter of the protruding head 310 may be 0.5 mm; the inner diameter of the groove 110 of the pressing sleeve 100 in the pressing assembly is larger than the outer diameter of the protruding head 310 and is smaller than the outer diameter of the sealing ring 400 in the elastic opening state, the depth of the adjusting rod 200 screwed into the threaded hole 120 in the pressing sleeve 100 is deeper, the whole length of the pressing assembly formed by the groove 110 and the adjusting rod is smaller than the distance between the protruding head 310 and the abutting base 500, as shown in fig. 6, one end of the groove 110 of the pressing sleeve 100 can be sleeved on the protruding head 310, the protruding head 310 is inserted into the groove 110, and the notch end face of the groove 110 faces the EH oil module 600 to press the sealing ring 400; subsequently, the adjusting rod 200 is rotated, the depth of the threaded hole 120 is screwed through the adjusting thread section 210, so that the length of the adjusting rod 200 extending out of the pressing sleeve 100 is adjusted, and the overall length of the pressing assembly formed by the adjusting rod and the pressing sleeve is further adjusted, as shown in fig. 7, until one end of the adjusting rod 200 departing from the pressing sleeve 100 abuts against the abutting base 500, the adjusting rod 200 is continuously rotated, the pressing sleeve 100 moves towards the sealing ring 400 under the pushing action of the adjusting rod 200 to press the sealing ring, the sealing ring 400 is tightly sealed at the joint of the plug 300 and the orifice by extrusion deformation, so that the oil leakage position of the plug 300 is blocked, the maintenance operation is convenient, oil is not required to be continuously replenished to the EH oil module 600, the machine is not required to be stopped to realize the continuous operation of the steam turbine, and the cost of the.

Specifically, the plugging device may be used at a portion of the EH oil module 600 where the plug 300 is plugged on the oil tank, the oil pump, the pipeline, and other components, and when the plug 300 is located at the bottom of the above components, the base of the EH oil module 600 may be used as the abutting seat 500, and when the plug 300 is located at the side or top of the above components, the abutting seat 500 may be fixedly disposed at a position of the EH oil module 600 opposite to the plug 300, so as to realize the abutting action of the abutting seat 500 on the end of the adjusting rod 200, and the sealing ring 400 is compressed by the compression sleeve 100 to plug the connection between the plug 300 and the orifice.

Preferably, as shown in fig. 1, 4, 6 and 7, the groove 110 and the threaded section 210 may be coaxial, and when the pressing assembly is sandwiched between the sealing ring 400 and the abutting base 500, the adjusting rod 200 and the groove 110 are approximately coaxial, so that the adjusting rod 200 can apply a relatively uniform acting force to the circumferential direction of the end surface of the groove 110, and accordingly, the end surface of the groove 110 can apply a relatively uniform pressing force to the circumferential direction of the sealing ring 400, thereby ensuring the sealing performance of the sealing ring 400 in sealing the circumferential direction of the connection between the plug 300 and the orifice.

In this embodiment, as shown in FIG. 1, the notched end of the groove 110 is provided with a flared section 111 along its circumference. The inner diameter of the groove 110 is larger than the outer diameter of the convex head 310 and smaller than the outer diameter of the sealing ring 400 in the elastic opening state, the inner wall of the flared section 111 is a tapered slope surface along the axial direction, and the tapered slope surface inclines outward along the direction toward the sealing ring 400, when the pressing sleeve 100 presses the sealing ring 400, as shown in the perspective view in fig. 7, the tapered slope surface simultaneously applies a first component force F1 toward the EH oil module 600 and a second component force F2 toward the convex head 310 to the sealing ring 400, and the two component forces are combined into a pressing force F toward the connection between the plug 300 and the orifice, so that the sealing ring 400 is effectively pressed toward the connection between the plug 300 and the orifice, the sealing performance of the sealing ring 400 at the connection is ensured, and the occurrence of the situation that the sealing ring 400 cannot perform the sealing function even if the sealing ring 400 is pressed by the end surface of the groove 110, no longer presses. Specifically, the difference between the inner diameter of the groove 110 and the outer diameter of the corresponding protruding head 310 may range from 0.6mm to 1.0mm, and preferably, the difference between the inner diameter of the groove 110 and the outer diameter of the corresponding protruding head 310 may range from 0.8 mm; the inner diameter of the flared end of the flared section 111 may be greater than the outer diameter of the sealing ring 400 in the elastically expanded state, and the difference between the two may be 0mm to 0.4mm, and preferably, the difference between the two may be 0.2 mm.

Optionally, in this embodiment, as shown in fig. 2 and fig. 3, the adjustment rod 200 may further include an abutting section 230, the abutting section 230 is fixedly connected to an end of the threaded section 210 away from the pressing sleeve 100, and the abutting section 230 is tapered. The tip of the abutting section 230 deviates from the pressing sleeve 100, as shown in fig. 7, by adjusting the screw thread screwing length of the adjusting rod 200 and the pressing sleeve 100, the top end of the pressing sleeve 100 presses the sealing ring 400, the bottom end of the adjusting rod 200 abuts against the abutting seat 500, at this time, the tip of the abutting section 230 abuts against the abutting seat 500, the two are in point connection, when the adjusting rod 200 is continuously rotated, the tip of the abutting section 230 can play a role in centering the joint between the adjusting rod 200 and the abutting seat 500, so that the position stability of the rotating process of the adjusting rod 200 is improved, further the position stability of the pressing sleeve 100 is improved, the pressing effect of the pressing sleeve 100 on the sealing ring 400 is ensured, the deviation between the adjusting rod 200 and the abutting seat 500 during rotation is reduced, the circumferential pressing effect of the pressing sleeve 100 on the sealing ring 400 is unbalanced and comprehensive, and the sealing performance of the sealing ring 400 is. Specifically, the abutting section 230 may be a pyramid, and preferably, the abutting section 230 is a cone.

Optionally, in this embodiment, the abutting surface of the abutting base 500 facing the plug 300 may be provided with a limiting groove, the limiting groove is a tapered groove, and the tapered groove and the plug 300 are coaxially arranged. When compressing tightly the subassembly and pressing from both sides and locating EH oil module 600 and supporting between the footstock 500, the most advanced rotation that supports top section 230 and insert in the conical groove, and the most advanced of supporting top section 230 is unique with the grafting position of the bottom point portion of conical groove, adjust pole 200 and rotate the in-process, the bottom point portion of conical groove also can be spacing to the most advanced of supporting top section 230, thereby further ensure the positional stability who adjusts pole 200 and rotate the process, improve the equilibrium that compresses tightly cover 100 and compress tightly sealing washer 400 circumference, and then improve the leakproofness of sealing washer 400 to plug 300 and drill way junction circumference, ensure the shutoff of sealing washer 400 to the leak.

Specifically, in this embodiment, as shown in fig. 2 and 3, the adjustment rod 200 may further include a clamping section 220, the clamping section 220 is connected between the threaded section 210 and the abutting section 230, and an outer wall surface of the clamping section 220 includes two clamping planes 221 disposed oppositely. Two centre gripping planes 221 of centre gripping section 220 are approximate parallel arrangement, when rotating the regulation pole 200, compare and directly apply the rotational force to the excircle face of screw thread section 210 or the conical surface that supports section 230, it is higher to two convenient degrees and the stability that the rotational force was applied to centre gripping planes 221, and can use the spanner card to rotate regulation pole 200 in two centre gripping planes 221 departments, thereby improve the regulation convenient degree of adjusting pole 200 greatly, correspondingly ensure to adjust the distance of pole 200 and the relative rotation of pressing sleeve 100, improve the effect of compressing tightly the sealing washer 400 of cover 100, and then ensure the sealing effect of sealing washer 400.

It should be noted that the clamping section 220 may be an end rod body different from the threaded section 210, or the clamping plane 221 may be directly machined on a rod section of the threaded section 210 close to the abutting section 230 to obtain the clamping section 220, and the number of the clamping planes 221 on the clamping section 220 may be four, six, and the like. Preferably, the threaded section 210, the abutting section 230 and the clamping section 220 may be integrally formed, and the three are integrally formed, so that the connection firmness and the supporting strength of the three can be improved, and the firmness of supporting the adjusting rod 200 between the pressing sleeve 100 and the abutting base 500 can be ensured; in addition, the same rod body is respectively tapped to obtain a thread section 210, cut to obtain a clamping plane 221 and a propping section 230, so that the processing convenience of the adjusting rod 200 is greatly improved.

Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The pressing assembly is characterized by comprising a pressing sleeve (100) and an adjusting rod (200), wherein one end of the pressing sleeve (100) is provided with a groove (110), the groove (110) is used for accommodating a protruding head (310) of a plug (300), and the other end of the pressing sleeve (100) is provided with a threaded hole (120); the adjusting rod (200) comprises a threaded section (210), and the threaded section (210) is in threaded connection with the threaded hole (120).

2. Compression assembly according to claim 1, wherein the notched end of the groove (110) is provided with a flared section (111) along its circumference.

3. The compression assembly of claim 1, wherein the adjustment rod (200) further comprises an abutting section (230), the abutting section (230) is fixedly connected to an end of the threaded section (210) facing away from the compression sleeve (100), and the abutting section (230) is tapered.

4. The compression assembly of claim 3, wherein the adjustment rod (200) further comprises a clamping section (220), the clamping section (220) is connected between the threaded section (210) and the abutting section (230), and an outer wall surface of the clamping section (220) comprises two clamping planes (221) which are oppositely arranged.

5. The compression assembly of claim 4, wherein the threaded section (210), the abutment section (230), and the clamping section (220) are integrally formed.

6. The compression assembly of any of claims 1-5, wherein the difference between the inner diameter of the recess (110) and the outer diameter of the corresponding projection head (310) is in the range of 0.6mm to 1.0 mm.

7. The compression assembly of any of claims 1-5, wherein the recess (110) is coaxial with the threaded bore (120).

8. An occlusion device comprising a sealing ring (400) and the compression assembly of any of claims 1-7, the sealing ring (400) having an inner diameter smaller than an outer diameter of a protruding head (310) of a plug (300); when the sealing ring (400) is sleeved on the convex head (310), the inner diameter of the groove (110) in the pressing assembly is smaller than the outer diameter of the sealing ring (400).

9. The occlusion device of claim 8, wherein the inner diameter of the sealing ring (400) differs from the outer diameter of the protruding head (310) by a value in the range of 0.4mm to 0.6 mm.

10. An EH oil system, characterized by, including EH oil module (600), support the footstock (500) and the plugging device of claim 8 or 9, the aperture of EH oil module (600) has sealed the plug (300), the sealing washer (400) of plugging device cover is located the bellying head (310) of plug (300), compress tightly in the plugging device cover set up the bellying head (310) and support and press the sealing washer (400), compress tightly the regulation pole (200) butt of subassembly the footstock (500).