CN220581103U - Expansion machine convenient to maintenance - Google Patents
Expansion machine convenient to maintenance Download PDFInfo
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- CN220581103U CN220581103U CN202321993939.3U CN202321993939U CN220581103U CN 220581103 U CN220581103 U CN 220581103U CN 202321993939 U CN202321993939 U CN 202321993939U CN 220581103 U CN220581103 U CN 220581103U
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- 238000012423 maintenance Methods 0.000 title claims description 10
- 230000007246 mechanism Effects 0.000 claims abstract description 25
- 238000005096 rolling process Methods 0.000 claims description 22
- 238000003780 insertion Methods 0.000 claims description 8
- 230000037431 insertion Effects 0.000 claims description 8
- 239000004576 sand Substances 0.000 description 11
- 239000002932 luster Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 241001391944 Commicarpus scandens Species 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Control Of Turbines (AREA)
Abstract
The utility model discloses an expander convenient to maintain, which belongs to the field of turbine expanders and comprises a turbine volute, an adjustable nozzle assembly and an actuating mechanism, wherein an end cover is fixed in the turbine volute, the adjustable nozzle assembly comprises a cover plate, a rotating disc, nozzle blades and a positioning disc, a connecting pin is fixed on the rotating disc, the left end face of the rotating disc is attached to the right end face of the cover plate, a connecting rod is fixed on the actuating mechanism, when the adjustable nozzle assembly is assembled in the turbine volute, the connecting pin is inserted into a waist-shaped hole, the cover plate and the end cover are firstly fixed, the position of the actuating structure is firstly adjusted to the upper limit position of the stroke, then the rotating disc is adjusted to enable the connecting pin to be at the upper limit position of the stroke, then the rotating disc, the blades and the positioning disc are integrally assembled in the turbine volute, and the connecting pin is naturally inserted into the waist-shaped hole.
Description
Technical Field
The utility model belongs to the technical field of turbine expanders, and particularly relates to an expander convenient to maintain.
Background
The turbine expander is widely applied to industries such as chemical industry, is a key part machine necessary for obtaining cold energy, such as air separation equipment, natural gas liquefaction separation equipment, low-temperature crushing equipment and the like, and is a heart for ensuring the stable operation of the whole equipment.
For the conventional expansion machine, as shown in fig. 2 and 3, an end cover is arranged in a turbine volute, an adjustable nozzle assembly part of the turbine volute sequentially comprises a cover plate, a rotating disc, nozzle blades and a positioning disc from left to right, a plurality of fixing pins are fixed on the positioning disc, holes matched with the fixing pins are formed in the nozzle blades, a plurality of rotating pins are fixed on the nozzle blades, a plurality of waist-shaped holes for the rotating pins to slide in are formed in the rotating disc, a connecting pin is fixed on the rotating disc, an actuating mechanism is connected with the connecting pin and can control the rotating disc to rotate so that the nozzle blades move along the rotating pin, and openings among the nozzle blades are enlarged or reduced; in addition, the connecting pin is usually arranged between the cover plate and the rotating disc and is fixed on the rotating disc, a connecting rod is sleeved on the connecting pin, one end of the connecting rod is connected with the actuating mechanism through a universal joint structure, because the adjustable nozzle component of the conventional expander is integrally placed in the turbine volute and is influenced by the positions of the connecting rod and the actuating mechanism, and because the universal joint structure is composed of a transverse pin and a vertical pin, the position of the pin hole of the structure cannot be fixed, the centering assembly difficulty of the actuating mechanism and the connecting rod during assembly is increased, and therefore, the connecting rod and the actuating mechanism can be connected only by manually placing the adjustable nozzle component into the volute.
In practical use, the expander is provided with a small cold box which is used for wrapping the adjustable nozzle assembly part and the turbine volute for placing the nozzle part of the expander, and the small cold box is filled with pearly-luster sand for heat insulation so as to avoid the loss of cold air generated by the expander; when the actuating mechanism of the expander is connected with the connecting rod, workers are required to enter the cold box of the expander to open the small cold box, then the actuating mechanism is connected with the connecting rod, and then the filling of the pearly-luster sand is carried out;
in order to maintain the expander equipment and ensure the normal operation of the expander equipment, the expander needs to be overhauled regularly, and as the connecting position of the actuating mechanism and the connecting rod is in the small cold box, workers are required to enter the cold box of the expander to carry out the sand raking work on the pearly-luster sand, the work can be continued for a plurality of hours and is in the working environment for a long time, the pearly-luster sand is extremely harmful to human bodies due to the characteristics of the pearly-luster sand, in addition, the explosion accident of the cold box is affected by temperature difference and the like, and therefore, I develop the expander convenient to maintain, and the disassembly and the installation of the expander can be completed without manually entering the cold box to sand raking.
Disclosure of Invention
The utility model aims to provide an expander convenient to maintain, so as to solve the problems that the conventional expansion tank provided in the background art needs to be manually entered into a cold box for carrying out sand raking, a great deal of time is consumed, and the safety of workers is easily affected.
In order to achieve the above purpose, the present utility model provides the following technical solutions: including turbine spiral case, adjustable nozzle subassembly and actuating mechanism, be provided with the end cover in the turbine spiral case, adjustable nozzle subassembly part is from a left side to right side including apron, rolling disc, nozzle blade and positioning disk in proper order, be fixed with a plurality of fixed pins on the positioning disk, offer the hole that is used for connecting the fixed pin on the nozzle blade, simultaneously, be fixed with a plurality of rolling pins on the nozzle blade, offered the waist hole that supplies the rolling pin to slide in it on the rolling disc, be fixed with a connecting pin at the rolling disc, the connecting pin rotates the setting of dish orientation turbine spiral case inside direction, end cover and apron pass through the bolt fastening, positioning disk and rolling disc pass through cylindrical bolt and are connected, rolling disc left side terminal surface and apron right side terminal surface laminating, actuating mechanism fixes in the turbine spiral case and can be along fixed direction straight line back and forth movement, be fixed with a connecting rod on the actuating mechanism, offer the type jack of upper limit and the stroke lower limit cladding in it when rotating the connecting pin on the rolling disc, when the adjustable nozzle subassembly is assembled to the turbine waist, insert the type jack in the connecting pin.
Preferably, the connecting pin is a conical rod structure with guiding positioning.
Preferably, the rotating disc is provided with a fixing hole, the connecting pin is inserted into the fixing hole and the insertion depth of the connecting pin is smaller than the thickness of the rotating disc, and when the connecting rod is connected with the connecting pin, the distance from the connecting point of the connecting rod on the connecting pin to the rotating disc is smaller than the insertion depth of the connecting pin into the fixing hole.
Compared with the prior art, the utility model provides the expander convenient to maintain, which has the following beneficial effects:
according to the utility model, the cover plate is separated from the rotating disc by changing the structure of the conventional adjustable nozzle assembly, the actuating mechanism is positioned at the position where the connecting pin is controlled to move to the upper limit of the travel when the adjustable nozzle assembly is installed, then the cover plate and the end cover are fixed, then the rotating disc, the blades and the positioning disc are assembled and the rotating disc is adjusted to enable the connecting pin to be positioned at the upper limit of the travel, then the rotating disc, the blades and the positioning disc are integrally assembled into the turbine volute, the connecting pin is naturally inserted into the waist-shaped jack, and because the connecting pin is of a conical rod structure with guiding positioning, the connecting pin is more convenient to insert into the waist-shaped jack, in addition, the risk that the connecting pin is easy to break due to the lever principle can be prevented as much as possible by limiting the distance from the connecting point of the connecting rod to the rotating disc to the depth of the connecting pin to be less than the depth of the connecting pin inserted into the fixing hole, and the structure is arranged, when equipment is overhauled, sand is good by disassembling the adjustable nozzle assembly without entering the cold box, so that the overhaul time can be effectively saved, and the risk is reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate and together with the embodiments of the utility model and do not constitute a limitation to the utility model, and in which:
FIG. 1 is a schematic diagram of a connection structure between an expander and a cold box for easy maintenance according to the present utility model;
FIG. 2 is a schematic diagram of the connection between a conventional expander connection pin and an actuator;
FIG. 3 is a schematic illustration of the shape and connection relationship of a conventional expander connection pin and a rotating disk;
FIG. 4 is a schematic diagram showing the connection relationship between the connecting pin and the actuator of the expander for easy maintenance;
FIG. 5 is a schematic view showing the connection relationship between the shape of the connection pin and the rotation disc of the expander for easy maintenance;
in the figure: 1. a small cooling box; 2. an expander cold box; 3. an actuator; 4. a gimbal structure; 5. a connecting rod; 6. a connecting pin; 61. a fastening nut; 7. a cover plate; 8. a rotating disc; 9. a blade; 10. a positioning plate; 11. a rotation pin; 12. a fixing pin; 13. waist-shaped jack; 14. a cylindrical bolt.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 2 and 3, in the conventional manner that the actuating mechanism 3 and the connecting pin 6 of the expander are connected by the universal joint structure 4, the universal joint structure 4 can ensure that the actuating mechanism 3 does not rotate along with the connecting pin 6 when the connecting pin rotates along with the rotating disc 8, and only needs to move along the set running direction.
Therefore, referring to fig. 1, the present utility model provides a technical solution: including turbine spiral case, adjustable nozzle subassembly and actuating mechanism 3, be provided with the end cover in the turbine spiral case, adjustable nozzle subassembly part is from a left side to right side including apron 7, rolling disc 8, nozzle blade 9 and positioning disk 10 in proper order, be fixed with a plurality of fixed pins 12 on the positioning disk 10, offer the hole that is used for connecting fixed pin 12 on nozzle blade 9, simultaneously, be fixed with a plurality of rolling pins 11 on nozzle blade 9, offer the waist-shaped hole that supplies rolling pin 11 to slide in it on rolling disc 8, be fixed with a connecting pin 6 on rolling disc 8, connecting pin 6 sets up towards turbine spiral case inside direction from rolling disc 8, end cover and apron 7 pass through the bolt fastening, positioning disk 10 and rolling disc 8 are connected through a plurality of cylinder bolts 14, rolling disc 8 left side terminal surface is laminated with apron 7 right side terminal surface, actuating mechanism 3 is fixed in the turbine spiral case and can be along the straight line back and forth movement of fixed direction, be fixed with a connecting rod 5 on actuating mechanism 3, set up on connecting rod 5 and rotate connecting pin 6 and insert in the spiral case upper end-to-shaped jack when adjusting to insert in the spiral case 6 in the interior side of plug-shaped hole 13.
The connecting pin 6 is a conical rod structure with guiding positioning so as to facilitate the insertion of the connecting pin 6 into the waist-shaped insertion hole 13, the rotating disc 8 is provided with a fixing hole, the connecting pin 6 is inserted into the fixing hole and the insertion depth of the connecting pin is smaller than the thickness of the rotating disc 8, when the connecting rod 5 is connected with the connecting pin 6, the distance from the connecting point of the connecting rod 5 on the connecting pin 6 to the rotating disc 8 is smaller than the insertion depth of the connecting pin 6 into the fixing hole so as to shorten the moment arm, the risk that the connecting pin 6 is easy to break due to the lever principle is prevented as far as possible, in addition, in a conventional expansion machine, due to the fact that the connecting pin 6 and the rotating disc 8 are in interference fit (see fig. 3), axial play is possibly caused after loosening, and finally the connecting pin is separated from the rotating disc 8, so that accidents of the nozzle blades 9 cannot be adjusted are caused. When the connecting pin is damaged in use, only the connecting pin needs to be replaced, and the rotating disc does not need to be replaced, so that the cost is saved.
Through the expander convenient to maintain, the quick-wear parts of the expander, including the adjustable nozzle, the rotor, the bearing, the sealing sleeve and the like, can be replaced without sand skimming of a cold box in the maintenance process of the large expander, so that the maintenance cost is greatly saved, and the economy of the expander is improved.
The working principle and the using flow of the utility model are as follows:
when the adjustable nozzle assembly is installed, the actuating mechanism is positioned at the position where the actuating mechanism controls the connecting pin 6 to move to the upper limit of the stroke, then the cover plate 7 and the end cover are fixed, then the rotating disc 8, the blades 9 and the positioning disc 10 are assembled, the rotating disc 8 is adjusted to enable the connecting pin 6 to be positioned at the upper limit of the stroke, then the rotating disc 8, the blades 9 and the positioning disc 10 are integrally assembled into the turbine volute, the connecting pin 6 can be naturally inserted into the waist-shaped jack 13, and because the connecting pin 6 is of a conical rod structure with guiding positioning, the connecting pin is more convenient to insert into the waist-shaped jack 13, when the actuating mechanism 3 controls the nozzle opening to change, the connecting pin 6 can move up and down in the waist-shaped jack 13, so that sand raking is carried out in the cold box 2 of the expander by disassembling the adjustable nozzle assembly when equipment is overhauled, the overhauling time can be effectively saved, and the risk is reduced.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. The utility model provides an expander convenient to maintenance, includes turbine spiral case, adjustable nozzle subassembly and actuating mechanism (3), be provided with the end cover in the turbine spiral case, adjustable nozzle subassembly part includes apron (7), rolling disc (8), nozzle blade (9) and positioning disk (10) from a left side to the right side in proper order, be fixed with a plurality of fixed pins (12) on positioning disk (10), offer the hole that is used for connecting fixed pin (12) on nozzle blade (9), simultaneously, be fixed with a plurality of rolling pins (11) on nozzle blade (9), offered on rolling disc (8) and supplied rolling pin (11) at its gliding waist hole, be fixed with a connecting pin (6) at rolling disc (8), connecting pin (6) are rotated rolling disc (8) and are set up its characterized in that towards turbine spiral case inside direction: the end cover and the cover plate (7) are fixed through bolts, the positioning disc (10) and the rotating disc (8) are connected through cylindrical bolts (14), the left end face of the rotating disc (8) is attached to the right end face of the cover plate (7), the actuating mechanism (3) is fixed in a turbine volute and can do linear reciprocating motion along a fixed direction, a connecting rod (5) is fixed on the actuating mechanism (3), a waist-shaped jack (13) which is used for wrapping the upper limit and the lower limit of the stroke on the rotating disc (8) when the connecting pin (6) rotates is arranged on the connecting rod (5), and when the adjustable nozzle assembly is assembled in the turbine volute, the connecting pin (6) is inserted into the waist-shaped jack (13).
2. An expander for facilitating maintenance according to claim 1 and wherein: the connecting pin (6) is of a conical rod structure with guiding positioning function.
3. An expander for facilitating maintenance according to claim 2 and wherein: the rotary disc (8) is provided with a fixing hole, the connecting pin (6) is inserted into the fixing hole and the insertion depth of the connecting pin is smaller than the thickness of the rotary disc (8), and when the connecting rod (5) is connected with the connecting pin (6), the distance from the connecting point of the connecting rod (5) on the connecting pin (6) to the rotary disc (8) is smaller than the insertion depth of the connecting pin (6) into the fixing hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321993939.3U CN220581103U (en) | 2023-07-27 | 2023-07-27 | Expansion machine convenient to maintenance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321993939.3U CN220581103U (en) | 2023-07-27 | 2023-07-27 | Expansion machine convenient to maintenance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220581103U true CN220581103U (en) | 2024-03-12 |
Family
ID=90121495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321993939.3U Active CN220581103U (en) | 2023-07-27 | 2023-07-27 | Expansion machine convenient to maintenance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220581103U (en) |
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2023
- 2023-07-27 CN CN202321993939.3U patent/CN220581103U/en active Active
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