CN213124806U

CN213124806U - Steam turbine instrument signal line seal structure

Info

Publication number: CN213124806U
Application number: CN202022613136.3U
Authority: CN
Inventors: 杨�远; 赵润林; 徐升晖; 刘应红; 赵伟; 翟羿; 徐野丁; 肖安海; 冯江涛; 徐加维; 王琰
Original assignee: Guizhou Xineng Electric Power Construction Co Ltd
Current assignee: Guizhou Xineng Electric Power Construction Co Ltd
Priority date: 2020-11-12
Filing date: 2020-11-12
Publication date: 2021-05-04
Anticipated expiration: 2030-11-12

Abstract

The utility model discloses a steam turbine instrument signal line seal structure, it includes the tank wall and the instrument signal line of steam turbine, be equipped with the signal hole on the tank wall, be equipped with the signal pipe in the signal hole, the signal pipe both ends are passed through the nut and are fixed on the tank wall, and outside the case was drawn forth in the instrument signal line passed the signal pipe, were equipped with junction box one in the tank wall inboard, junction box one is equipped with the side case lid, and the bottom slope is arranged and is equipped with the oil drain hole, and the slope of instrument signal line incline upward passes side case lid and signal pipe and gets into outside junction box two, and the instrument signal line level passes on two side case lids of junction box are. After the transformation construction is carried out, the oil leakage channel of the outgoing line of the temperature element is effectively blocked, the oil leakage problem is greatly improved, and meanwhile, the bottom of the junction box adopts an inclined design, so that lubricating oil leaked by other thermotechnical elements at the bottom can be effectively introduced into a bearing box of a steam turbine, and the cleanness and the sanitation of the inside of the junction box are kept.

Description

Steam turbine instrument signal line seal structure

Technical Field

The utility model relates to a steam turbine especially relates to a steam turbine instrument signal line seal structure, belongs to mechanical equipment and repairs technical field.

Background

A large number of temperature measuring elements for detecting the temperature of a bearing and a pad of equipment are arranged on a steam turbine, and the oil leakage phenomenon at the temperature leading-out part of a bearing box is very serious. Not only lubricating oil is lost, but also the field environment is polluted, and meanwhile, due to the fact that oil stains exist on equipment and pipelines, fire hazards of field equipment are increased, and normal operation of a machine and safe and civilized production can be affected in serious cases.

Because the high-speed rotation of steam turbine can throw a large amount of lubricating oil on the equipment on every side, has the damage when temperature element or other thermal technology equipment wiring surface, and the lubricating oil that adheres to its surface will be followed the gap entering into component lead-out wire inside of damage department, because capillary phenomenon's existence, even the component mounted position is less than lead-out wire and wears out the hole position, lubricating oil also can be followed the lead-out wire and leaked outside the equipment, causes the oil impregnate.

For the above oil leakage situation, a common treatment method is to peel off a small section of protective and shielding layer at the middle section of the outgoing line of the component, and only leave the internal component wiring. The method can not effectively solve the problem of oil leakage of the element lead-out wire due to the capillary phenomenon, and simultaneously, because the protection and shielding layer is cancelled, the anti-interference capability, the insulating property and the external force damage resistance of the element are greatly reduced, and the element lead-out wire is easy to damage and is grounded, so that the element is damaged.

The sealing between the joint at the leading-out hole of the element leading-out wire and the equipment cylinder body is not in place, a gap exists, and when the turbine rotating at high speed throws lubricating oil above the gap, the lubricating oil can leak to the outside of the equipment along the gap.

For the leakage phenomenon, the conventional method is to wind a raw material belt on the threads of the joint to block the thread gap to achieve the sealing effect, but the method cannot thoroughly solve the problem of oil leakage, and lubricating oil can slowly leak from the raw material for sealing. If it is outside to reach sealed effect through the nut to lock the threading hole joint, generally install the sealed pad that relies on oil additional in equipment inside at present and satisfy sealed requirement, generally can satisfy sealed requirement, however, this needs to apply great power to the threading hole joint and fastens, and is more arduous when next time maintaining.

A plurality of strands of element outgoing lines simultaneously penetrate out of one threading hole, intervals exist among the outgoing lines, and lubricating oil thrown to the periphery by a steam turbine also leaks to the outside of equipment along the intervals among the element outgoing lines to cause oil leakage.

In order to solve the oil leakage phenomenon, sealant is generally coated between the outgoing lines to achieve the sealing effect. This kind of processing mode, the sealed effect of the depths between the lead-out wire is not good, and the component wiring can not remove after sealed, and the later maintenance is inconvenient.

Disclosure of Invention

The to-be-solved technical problem of the utility model is: the sealing structure and the sealing method thereof are provided according to the on-site real standard condition, and the technical problem of oil leakage of the steam turbine instrument signal wire is effectively solved.

The technical scheme of the utility model is that: the utility model provides a steam turbine instrument signal line seal structure, it includes the tank wall and the instrument signal line of steam turbine, be equipped with the signal hole on the tank wall, be equipped with the signal tube in the signal hole, the signal tube both ends are passed through the nut and are fixed on the tank wall, and the instrument signal line passes and draws forth the incasement in the signal tube outside, is equipped with junction box one in the tank wall inboard, junction box one is equipped with side case lid one, and the bottom slope is arranged and is equipped with the oil drain hole, and the slope is passed through side case lid one to the instrument signal line in the signal tube gets into with signal tube fixed connection's junction box two, junction box two is equipped with side case lid two, and the instrument line level passes side case lid two of junction.

The first junction box is fixed on the box wall through a nut, and the signal tube is located on the upper portion of the first junction box.

And the bottom of the second junction box is obliquely arranged and connected above the signal tube.

The first side box cover is connected to the first junction box through a fastener, a sleeve pipe which is obliquely arranged is welded on the first side box cover, an instrument signal wire is located in the sleeve pipe, a conical cavity is arranged on the inner side of the bottom end of the sleeve pipe, a sealing ring is arranged in the cavity, a locking nut is connected to the outer side of the bottom end of the sleeve pipe through threads, and the sealing ring is compressed and sealed through the locking nut.

The second side box cover is connected to the second junction box through a fastener, a sleeve pipe horizontally arranged is welded on the second side box cover, an instrument signal wire is located in the sleeve pipe, a conical cavity is arranged on the inner side of the bottom end of the sleeve pipe, a sealing ring is arranged in the cavity, a locking nut is connected to the outer side of the bottom end of the sleeve pipe through threads, and the sealing ring is compressed and sealed through the locking nut.

An oil-resistant rubber sleeve is arranged on the instrument signal wire and located at the upper side end of the sleeve, and an oil leading hole is formed in the oil-resistant rubber sleeve.

The included angle between the sleeve and the first side box cover is 30-40 degrees.

And the included angle between the sleeve and the second side box cover is 90 degrees.

In order to improve the oil seepage prevention effect, the instrument wire protective layer and the shielding layer can be removed within the range of the oil-resistant rubber sleeve on the premise of not influencing the reliability of equipment, so that the oil seepage prevention effect is correct.

The utility model has the advantages that: compared with the prior art, adopt the technical scheme of the utility model, through the use to the terminal box after the improvement, and improve temperature element lead-out wire mounting means, solved the problem of steam turbine bearing temperature element lead-out wire oil impregnate. After the transformation construction is carried out, the oil leakage channel of the outgoing line of the temperature element is effectively blocked, the oil leakage problem is greatly improved, and meanwhile, the bottom of the junction box adopts an inclined design, so that the lubricating oil leaked by other thermotechnical elements at the bottom can be effectively introduced into the bearing box of the steam turbine, the cleanness and the sanitation inside the junction box are kept, and a good use effect is achieved.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of part A of the present invention;

fig. 3 is a partial enlarged view of B of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings.

Example 1: the utility model provides a steam turbine instrument signal line seal structure, it includes the tank wall 8 and the instrument signal line 6 of steam turbine, be equipped with the signal hole on the tank wall 8, be equipped with signal tube 4 in the signal hole, 4 both ends of signal tube are fixed on the tank wall through nut 3 (install between nut 3 and tank wall 8 additional and rely on the oil to seal to fill up), outside instrument signal line 6 passes and draws forth the case in the signal tube 4, is equipped with junction box one 2 in 8 inboards of tank wall, junction box one 2 is equipped with side case lid one 1, and the bottom slope is arranged and be equipped with oil drain hole 9, and instrument signal line 6 tilt up passes side case lid 1 and gets into in the junction box two 7 with 4 fixed connection of signal tube through signal tube 4, junction box two 7 are equipped with side case lid two 5, and instrument line level passes two side case lids 5 of junction box two 7 and.

Further, the first junction box 2 is fixed to the box wall 8 through the nut 3, and the signal tube 4 is located at the upper part of the first junction box 2.

Further, the bottom of the second junction box 7 is obliquely arranged and connected above the signal tube 4.

Furthermore, a side box cover 1 is connected to a junction box 2 through a fastening piece, a sleeve 13 which is obliquely arranged is welded on the side box cover 1, an instrument signal wire 6 is located in the sleeve 13, a conical cavity 16 is arranged on the inner side of the bottom end of the sleeve 13, a sealing ring 12 is arranged in the cavity 16, a locking nut 11 is connected to the outer side of the bottom end of the sleeve 13 through threads, and the sealing ring 12 is compressed and sealed through the locking nut 11.

Further, the second side box cover 5 is connected to the second junction box 7 through a fastener, a sleeve 13 horizontally arranged is welded on the second side box cover 5, the instrument signal wire 6 is located in the sleeve 13, a conical cavity 16 is arranged on the inner side of the bottom end of the sleeve 13, a sealing ring 12 is arranged in the cavity 16, a locking nut 11 is connected to the outer side of the bottom end of the sleeve 13 through threads, and the sealing ring 12 is compressed and sealed through the locking nut 11.

Further, an oil-resistant rubber sleeve 15 is arranged on the instrument signal wire 6, the oil-resistant rubber sleeve 15 is located at the upper side end of the sleeve 13, and an oil guiding hole 14 is formed in the oil-resistant rubber sleeve 15.

Furthermore, the included angle between the sleeve 13 and the side box cover 1 is 30-40 degrees.

Furthermore, the included angle between the sleeve 13 and the second side box cover 5 is 90 degrees.

A sealing method of a sealing structure of a steam turbine instrument signal wire is provided, and the method comprises the following steps: set up signal tube 4 on tank wall 8, 4 both ends of signal tube set up junction box one 2 and junction box two 7 respectively, junction box one 2 is located 8 inboards of tank wall, junction box two 7 is located the 8 outsides of tank wall, junction box one 2 will be low than junction box two 7 positions, instrument signal line 6 penetrates from junction box one 2 tilt up, it wears out on the outside secondary instrument to wear signal tube 4 respectively and wears out side case lid two 5 levels and wear out side case lid two 5, effectively seal instrument signal line 6 through sealing washer 12 on side case lid one 1, still be equipped with resistant oily gum cover 15 on instrument signal line 6, oily steam can gather resistant oily gum cover 15 on the rethread oil trap 14 collects junction box one 2 bottoms, rethread oil drain hole 9 is arranged inside the box.

The problem of oil leakage of the temperature element leading wire of the steam turbine bearing is solved by using the improved junction box and improving the installation mode of the temperature element leading wire. After the transformation construction is carried out, the oil leakage channel of the outgoing line of the temperature element is effectively blocked, the oil leakage problem is greatly improved, and meanwhile, the bottom of the junction box adopts an inclined design, so that the lubricating oil leaked by other thermotechnical elements at the bottom can be effectively introduced into the bearing box of the steam turbine, the cleanness and the sanitation inside the junction box are kept, and a good use effect is achieved.

Further, the sealing method further comprises: the method comprises the steps of firstly, processing one or more positions of a temperature outgoing line, selecting a small section of outgoing line to remove a mesh metal wire and an insulating layer of a shielding layer, sealing the outgoing line lead in and out of the lead inside the lead by using oil-resistant sealant, blocking a lubricating oil seepage channel, achieving the purpose of preventing oil seepage, and finally performing final packaging on the lead outside the lead by using a heat-shrinkable sleeve to play a role in protecting internal sealing glue and wiring; and secondly, adding an aviation plug at the middle section of the outgoing line, so that the effect of blocking the oil leakage channel by the outgoing line is further enhanced, and meanwhile, the later maintenance is facilitated (when heat engine personnel need to turn over the tile for maintenance, the cable does not need to be withdrawn and threaded from the beginning, and the aviation plug only needs to be disconnected, so that the maintenance working efficiency is greatly improved).

Further, the method further comprises: the sealing between the joint and the equipment cylinder body is processed at the threading hole of the element outgoing line, if the sealing is realized through threads, oil-resistant sealant can be directly smeared on the joint threads, and the gaps between the threads are plugged through the sealant, so that the sealing effect is achieved; if the threading hole joint is locked through the screw cap to achieve the sealing effect, the sealing gasket depending on oil can be additionally arranged inside the equipment, and meanwhile, a layer of oil-resistant sealant is smeared after oil stains around the sealing gasket are cleaned up to achieve the sealing requirement.

Further, the method further comprises: if a plurality of element wiring uniformly penetrate out from one threading hole, a special base is used for installation, physical isolation among the outgoing lines is realized, and a lubricating oil seepage channel is eliminated.

Further, the method further comprises: under the condition that the internal concentrated outgoing line is isolated from the external, when the outgoing line is isolated, an oil-resistant sealing ring needs to be used for sealing and isolating each single channel, and meanwhile, a sealant also needs to be used for fully isolating and plugging each outgoing line at the incoming line end.

Further, the method further comprises: at the head of the steam turbine, all the outgoing lines can be selected to be concentrated and uniformly concentrated into a threading hole to be led out, after the outgoing lines are led out, a large-size galvanized pipe or a stainless steel pipe is used for bending the outgoing lines into an L shape, then threading is carried out, the highest point of the outgoing lines is ensured to be far higher than the mounting point of the element, the oil leakage height of the outgoing lines of the element cannot exceed the highest point of the outgoing lines, the purpose of blocking the oil leakage is achieved, in this way, only one leakage point needs to be treated, all gaps are blocked in a full-welding mode, and the oil leakage is ensured.

When binding the leading-out wires of the thermotechnical elements in the bearing box, attention needs to be paid to not binding the element wires at places which are likely to accumulate more oil as far as possible; avoid the place that probably receives lubricating oil injection and erode, avoid because the rocking that the erodees and lead to the fact wiring wearing and tearing, damage.

The fixed department is tied up in the wiring is kept away from probably being washed away by the lubricating oil that sprays and is gone out, and it is higher to leave the bottom simultaneously, avoids the lead-out wire to sleep in oil, reduces the probability of oil impregnate.

The parts of the present invention not described in detail are the known techniques of those skilled in the art. Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims

1. The utility model provides a steam turbine instrument signal line seal structure, it includes the tank wall (8) and the instrument signal line (6) of steam turbine, its characterized in that: be equipped with the signal hole on tank wall (8), be equipped with signal tube (4) in the signal hole, signal tube (4) both ends are passed through nut (3) and are fixed on the tank wall, and outside signal tube (4) were drawn forth in instrument signal line (6) passed the case, be equipped with junction box (2) in tank wall (8) inboard, junction box (2) are equipped with side case lid (1), and the bottom slope is arranged and is equipped with oil drain hole (9), and instrument signal line (6) tilt up passes side case lid (1) and gets into in junction box two (7) with signal tube (4) fixed connection through signal tube (4), junction box two (7) are equipped with side case lid two (5), and the side case lid two (5) that instrument line level passed junction box two (7) are connected to on the outside secondary instrument.

2. The steam turbine meter signal line sealing structure according to claim 1, characterized in that: the first junction box (2) is fixed on the box wall (8) through a nut (3), and the signal tube (4) is located on the upper portion of the first junction box (2).

3. The steam turbine meter signal line sealing structure according to claim 1, characterized in that: the bottom of the second junction box (7) is obliquely arranged and connected above the signal tube (4).

4. The steam turbine meter signal line sealing structure according to claim 1, characterized in that: the side case lid (1) is connected to the junction box (2) through a fastener, a sleeve (13) which is obliquely arranged is welded on the side case lid (1), the instrument signal wire (6) is located in the sleeve (13), a conical cavity (16) is arranged on the inner side of the bottom end of the sleeve (13), a sealing ring (12) is arranged in the cavity (16), the outer side of the bottom end of the sleeve (13) is connected with a locking nut (11) through threads, and the sealing ring (12) is compressed and sealed through the locking nut (11).

5. The steam turbine instrument signal line sealing structure according to claim 1, wherein the second side box cover (5) is connected to the second junction box (7) through a fastener, a horizontally arranged sleeve (13) is welded on the second side box cover (5), the instrument signal line (6) is located in the sleeve (13), a conical cavity (16) is arranged on the inner side of the bottom end of the sleeve (13), a sealing ring (12) is arranged in the cavity (16), the outer side of the bottom end of the sleeve (13) is connected with a locking nut (11) through threads, and the sealing ring (12) is compressed and sealed through the locking nut (11).

6. The steam turbine meter signal line sealing structure according to claim 4, characterized in that: an oil-resistant rubber sleeve (15) is arranged on the instrument signal wire (6), the oil-resistant rubber sleeve (15) is located at the upper side end of the sleeve (13), and an oil guiding hole (14) is formed in the oil-resistant rubber sleeve (15).

7. The steam turbine meter signal line sealing structure according to claim 4, characterized in that: and the included angle between the sleeve (13) and the first side box cover (1) is 30-40 degrees.

8. The steam turbine meter signal line sealing structure according to claim 5, characterized in that: and the included angle between the sleeve (13) and the second side box cover (5) is 90 degrees.