CN220267782U - Anti-freezing pull rod of expansion machine - Google Patents
Anti-freezing pull rod of expansion machine Download PDFInfo
- Publication number
- CN220267782U CN220267782U CN202321980057.3U CN202321980057U CN220267782U CN 220267782 U CN220267782 U CN 220267782U CN 202321980057 U CN202321980057 U CN 202321980057U CN 220267782 U CN220267782 U CN 220267782U
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- China
- Prior art keywords
- pull rod
- rod body
- sheath
- expander
- temperature sensor
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- 238000007710 freezing Methods 0.000 title claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 20
- 230000007246 mechanism Effects 0.000 claims abstract description 9
- 230000001105 regulatory effect Effects 0.000 claims abstract description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000002528 anti-freeze Effects 0.000 claims 4
- 238000000034 method Methods 0.000 claims 1
- 230000008014 freezing Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model relates to the field of expanders, and discloses an antifreezing pull rod of an expander, which comprises a pull rod body parallel to an impeller rotating shaft in the expander and arranged in the expander, wherein one end of the pull rod body is connected with a nozzle assembly in an expansion end of the expander, and the other end of the pull rod body is connected with an executing mechanism so as to drive the flow of the nozzle assembly to be regulated through the executing mechanism; the temperature sensor and the heating element are arranged on the sheath, and the controller is configured to control the opening and closing of the heating element according to a high temperature threshold value and a low temperature threshold value detected by the temperature sensor; according to the anti-freezing pull rod, the periphery of the pull rod body can be automatically heated according to the low-temperature and high-temperature threshold value set by the system, so that the pull rod is prevented from being frozen, and the flexibility of adjustment of the pull rod is ensured.
Description
Technical Field
The utility model relates to an expander, in particular to an anti-freezing pull rod of the expander.
Background
In the prior art, the inside of a radial flow turbine expander generally rotates through a matched pull rod to drive the area of a circular nozzle blade passage to change so as to realize flow regulation, and in a nozzle flow regulating device of the turbine expander disclosed in patent application CN107701241A, the opening of an eccentric disc driving nozzle is driven to regulate through the rotation of an eccentric disc shaft (namely the pull rod) which is parallel to the axial direction of an impeller rotating shaft of the expander.
However, many times, the expansion working medium is in a low-temperature (less than or equal to-50 ℃) state, in actual operation, due to heat transfer and cooling at the expansion end of the expansion machine, the pull rod for adjusting the opening degree of the adjacent side driving nozzle is seriously frozen, so that the pull rod can not rotate due to freezing, normal flow adjustment can not be carried out on the nozzle, the system load adjustment and variable working condition operation are seriously influenced, therefore, how to realize the pull rod freezing prevention, ensure that the nozzle is adjustable to meet the production requirement, and the expansion working medium has important practical significance and urgent requirement.
Disclosure of Invention
The utility model aims to overcome the defects of the background technology and provides an anti-freezing pull rod of an expander.
The embodiment of the utility model is realized by the following technical scheme:
an anti-freezing pull rod of an expansion machine comprises a pull rod body which is parallel to an impeller rotating shaft in the expansion machine and arranged in the expansion machine, wherein one end of the pull rod body is connected with a nozzle assembly in an expansion end of the expansion machine, and the other end of the pull rod body is connected with an executing mechanism so as to drive the flow of the nozzle assembly to be regulated through the executing mechanism;
the temperature sensor and the heating element are arranged on the sheath, and the controller is configured to control the opening and closing of the heating element according to a high temperature threshold value and a low temperature threshold value detected by the temperature sensor.
Further, a plurality of heating elements are arranged on the sheath around the pull rod body.
Further, a plurality of deep holes parallel to the axial direction of the pull rod body are formed in the sheath, and the temperature sensor and the heating elements are respectively arranged in one group of deep holes in a penetrating mode.
Further, the end part of the sheath connected with the expansion end is also provided with stop blocks positioned at two sides of the end part of the pull rod body, so as to prevent frost in the expansion end from expanding to the pull rod body.
Further, the sheath is cylindrical, and is sleeved on the pull rod body.
The technical scheme of the embodiment of the utility model has at least the following advantages and beneficial effects:
according to the anti-freezing pull rod of the expansion machine, the sheath is arranged on the periphery of the pull rod body, the temperature sensor and the heating element are arranged on the sheath, and according to the low-temperature and high-temperature threshold value set by the system, the periphery of the pull rod body can be automatically heated, so that the pull rod body is prevented from being frozen, and the flexibility of adjustment of the pull rod is ensured.
Drawings
FIG. 1 is a schematic diagram of the structure of the freeze protection tie rod of the expander of the present utility model;
icon: 1-controller, 2-temperature sensor, 3-heating element, 4-sheath, 5-pull rod body, 6-fastener, 7-expansion end.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Referring to fig. 1, an anti-freezing pull rod of an expander is connected between an actuating mechanism and a nozzle assembly in the expander, wherein the anti-freezing pull rod comprises a pull rod body 5, the pull rod body 5 is parallel to an impeller rotating shaft in the expander and is arranged in the expander, a first end of the pull rod body 5 is connected with the nozzle assembly, the actuating mechanism at a second end of the pull rod body 5 can be a pneumatic or electric actuating mechanism, and the rotation of the pull rod 5 is driven to realize the adjustment of flow in the nozzle assembly.
Wherein, the circumference of the pull rod body 5 is also provided with a sheath 4, and the sheath 4 can be a plate-shaped structure or a tubular structure arranged around the pull rod body 5; in this embodiment, the sheath 4 is cylindrical, and is sleeved on the pull rod body 5; the right end of the sheath 4 is bolted to the side wall of the expansion end 7 in the expander.
In addition, the pull rod body 5 is further provided with a temperature sensor 2 and a heating element 3, the temperature sensor 2 and the heating element 3 are connected with a controller 1, the controller 1 can be arranged on the sheath 4 or other structures of the expander, and the controller 1 is configured to control the opening and closing of the heating element 3 according to a high temperature threshold value and a low temperature threshold value detected by the temperature sensor 2.
Specifically, in one embodiment, when the temperature sensor 2 detects that the temperature of the circumferential side of the pull rod body 5 is below 20 ℃, the controller 1 turns on the heating element 3 to heat; when the temperature sensor 2 detects that the temperature of the circumferential side of the drawbar body 5 reaches 70 c, the heating element 3 is controlled to stop heating.
Referring to fig. 1, in this embodiment, a plurality of heating elements 3 are disposed on a sheath 4 around a pull rod body 5, a plurality of deep holes parallel to the axial direction of the pull rod body 5 are formed in the sheath 4, the plurality of deep holes are uniformly arranged around the pull rod body 5, and the temperature sensor 2 and the plurality of heating elements 3 are respectively disposed in a group of deep holes in a penetrating manner.
In addition, the end of the sheath 4 near the expansion end 7 is further provided with an upper set of stop blocks and a lower set of stop blocks (not shown), and the two sets of stop blocks are located at two sides of the end of the pull rod body 5 and used for stopping frost condensed in the expansion end 7 from expanding onto the pull rod body 5, so that the outer wall and the periphery of the pull rod body 5 are prevented from icing.
The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (5)
1. An anti-freezing pull rod of an expansion machine comprises a pull rod body (5) which is parallel to an impeller rotating shaft in the expansion machine and is arranged in the expansion machine, one end of the pull rod body (5) is connected with a nozzle assembly in an expansion end (7) of the expansion machine, and the other end of the pull rod body is connected with an executing mechanism so as to drive the flow of the nozzle assembly to be regulated through the executing mechanism; the method is characterized in that:
the novel temperature sensor comprises a pull rod body (5), and is characterized by further comprising a controller (1) and a sheath (4) arranged around the periphery of the pull rod body (5), wherein the sheath (4) is fixedly arranged on the expansion end (7), a temperature sensor (2) and a heating element (3) are arranged on the sheath (4), and the controller (1) is configured to control the opening and closing of the heating element (3) according to a high temperature threshold value and a low temperature threshold value detected by the temperature sensor (2).
2. The expander antifreeze tie rod of claim 1, wherein: a plurality of heating elements (3) are arranged on the sheath (4) around the pull rod body (5).
3. The expander antifreeze tie rod of claim 2, wherein: the sheath (4) is provided with a plurality of deep holes parallel to the axial direction of the pull rod body (5), and the temperature sensor (2) and the heating elements (3) are respectively arranged in a group of deep holes in a penetrating mode.
4. The expander antifreeze tie rod of claim 1 or 2, wherein: the end part of the sheath (4) connected with the expansion end (7) is also provided with stop blocks positioned at two sides of the end part of the pull rod body (5) and used for stopping frost in the expansion end (7) from expanding to the pull rod body (5).
5. The expander antifreeze tie rod of claim 1 or 2, wherein: the sheath (4) is cylindrical and is sleeved on the pull rod body (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321980057.3U CN220267782U (en) | 2023-07-24 | 2023-07-24 | Anti-freezing pull rod of expansion machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321980057.3U CN220267782U (en) | 2023-07-24 | 2023-07-24 | Anti-freezing pull rod of expansion machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220267782U true CN220267782U (en) | 2023-12-29 |
Family
ID=89298732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321980057.3U Active CN220267782U (en) | 2023-07-24 | 2023-07-24 | Anti-freezing pull rod of expansion machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220267782U (en) |
-
2023
- 2023-07-24 CN CN202321980057.3U patent/CN220267782U/en active Active
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