CN219870026U - Temperature sensor for large steam turbine - Google Patents

Abstract

The utility model discloses a temperature sensor for a large steam turbine, which comprises a mounting shell, a temperature measuring probe and a tailstock, wherein the mounting shell is suitable for being mounted on the steam turbine, a mounting cavity is arranged at the rear end of the mounting shell, a through hole is formed in the bottom of the mounting cavity, the tail end of the temperature measuring probe is arranged in the mounting cavity, the front end of the temperature measuring probe penetrates through the through hole and extends to the outer side of the mounting shell, a plurality of pins are arranged at the tail end of the temperature measuring probe, the tailstock is arranged at the tail end of the mounting shell and can be adjusted along the length direction of the mounting shell, a plurality of pin sleeves are arranged at the front end of the tailstock, the pins are oppositely inserted into the pin sleeves one by one, an elastic contact piece is arranged in each pin sleeve, the elastic contact piece can stretch along the length direction of the pin sleeve, and the end parts of the pins are abutted against the elastic contact pieces.

Description

Temperature sensor for large steam turbine

Technical Field

The utility model relates to the field of temperature sensors, in particular to a temperature sensor for a large steam turbine.

Background

In order to better know the internal temperature of the working state when some large-scale steam turbines work, temperature sensors are used for real-time monitoring, so that the temperature is prevented from being too high. The contact pin and the connecting wire of the temperature detector in the prior art are in a conventional inserting mode, and the large steam turbine can vibrate during working, so that the inserting position of the contact pin is in broken contact, the output of a power signal is affected, temperature data cannot be accurately obtained, the condition of overhigh temperature occurs, equipment is easy to damage, and the contact pin is extruded to damage due to vibration.

Accordingly, there is a need in the art for further improvements.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems in the related art to some extent. Therefore, the utility model aims to provide a temperature sensor for a large steam turbine.

In order to achieve the above object, a temperature sensor for a large steam turbine according to an embodiment of the present utility model includes a mounting case, a temperature probe, and a tailstock.

The installation shell is suitable for being installed on the steam turbine, the installation shell rear end is equipped with the installation cavity, the installation cavity bottom is equipped with the through-hole.

The tail end of the temperature measuring probe is arranged in the mounting cavity, the front end of the temperature measuring probe penetrates through the through hole and extends to the outer side of the mounting shell, and a plurality of contact pins are arranged at the tail end of the temperature measuring probe.

The tail seat is arranged at the tail end of the installation shell and can be adjusted along the length direction of the installation shell, the front end of the tail seat is provided with a plurality of needle sleeves, and a plurality of contact pins are inserted in the needle sleeves in a one-to-one opposite mode.

And each needle sleeve is internally provided with an elastic contact piece, the elastic contact pieces can stretch and retract along the length direction of the needle sleeve, and the end parts of the contact pins are abutted against the elastic contact pieces.

In addition, a temperature sensor for a large steam turbine according to the above embodiment of the present utility model may have the following additional technical features:

according to one embodiment of the utility model, the elastic contact comprises an electrode pad and a spring.

The electrode plate is arranged in the needle sleeve, and the end part of the contact pin is propped against the electrode plate.

The spring is arranged in the needle sleeve, and the electrode plate is arranged on the spring and can move along with the expansion or contraction of the spring.

According to one embodiment of the utility model, the front end of the electrode plate is provided with a slot, and the end part of the contact pin is inserted into the slot.

According to one embodiment of the utility model, a plurality of propping pieces are arranged on the side wall of the slot, the plurality of propping pieces extend along the depth direction of the slot and are circumferentially distributed at intervals along the slot wall of the slot, and the plurality of propping pieces are propped against the surface of the contact pin respectively.

According to one embodiment of the present utility model, each of the holding pieces is formed in an arc shape, and both ends of the holding piece are connected to the slot wall.

According to one embodiment of the utility model, the tail end of the temperature measuring probe is provided with a sealing part, the front end of the sealing part is provided with a sealing gasket, and the sealing gasket is propped against the bottom of the mounting cavity to seal the through hole.

According to one embodiment of the utility model, the bottom wall of the mounting cavity is provided with a sealing groove, the sealing groove extends along the circumferential direction of the through hole, the surface of the sealing gasket is provided with a sealing rib, the sealing rib extends along the circumferential direction of the sealing gasket, and the sealing rib is arranged in the sealing groove.

According to one embodiment of the utility model, the temperature measuring probe further comprises a pressing piece, wherein the pressing piece is of a tubular structure, one end of the pressing piece is arranged in the mounting cavity and is in threaded connection with the side wall of the mounting cavity, and the other end of the pressing piece is pressed at the tail end of the temperature measuring probe.

According to one embodiment of the utility model, the surface of the tailstock is provided with an annular groove, the annular groove extends along the circumferential direction of the tailstock, a connecting piece is sleeved on the annular groove, the connecting piece extends along the circumferential direction of the tailstock, and the connecting piece is in threaded connection with the rear end of the mounting shell.

According to one embodiment of the utility model, a plurality of limit ribs are arranged on the outer side of the tailstock, extend along the length direction of the tailstock and are distributed at intervals along the circumferential direction of the tailstock;

the inner wall of the pressing piece is provided with a plurality of limiting grooves, the limiting grooves are distributed at intervals along the circumferential direction of the pressing piece, and the limiting ribs are inserted into the limiting grooves.

According to the temperature sensor for the large steam turbine, the elastic contact piece is arranged in the pin sleeve, so that the elastic contact piece is extruded when the pin sleeve is vibrated, the elastic contact piece can be contracted due to extrusion, the contact piece or the pin is prevented from being damaged due to extrusion, meanwhile, the elastic force of the elastic contact piece can enable the elastic contact piece to be stably abutted against the pin, and the pin sleeve is prevented from being broken due to vibration.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of the overall structure of an embodiment of the present utility model;

FIG. 2 is a side view of the overall structure of an embodiment of the present utility model;

FIG. 3 is a schematic cross-sectional view taken along the line A-A in FIG. 2 in accordance with an embodiment of the present utility model;

FIG. 4 is a schematic view of a connection between a pin and a sleeve in an embodiment of the present utility model;

FIG. 5 is an exploded view of the overall structure of an embodiment of the present utility model;

FIG. 6 is an enlarged view of portion B of FIG. 3 in accordance with an embodiment of the present utility model;

FIG. 7 is an enlarged view of portion C of FIG. 4 in accordance with an embodiment of the present utility model;

FIG. 8 is a schematic view of a gasket installation in an embodiment of the utility model.

Reference numerals:

a mounting case 10;

a mounting cavity 101;

a seal groove 1011;

a pressing member 102;

a limit groove 1021;

a temperature probe 20;

a pin 201;

a sealing portion 202;

a gasket 203;

sealing rib 2031;

a tailstock 30;

a needle sheath 301;

an elastic contact 302;

an electrode pad 3021;

a spring 3022;

a slot 3023;

a holding piece 3024;

an annular groove 303;

a connecting member 304;

and a spacing rib 3041.

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below are exemplary and intended to illustrate the present utility model and should not be construed as limiting the utility model, and all other embodiments, based on the embodiments of the present utility model, which may be obtained by persons of ordinary skill in the art without inventive effort, are within the scope of the present utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

A temperature sensor for a large-sized steam turbine according to an embodiment of the present utility model will be described in detail with reference to the accompanying drawings.

Referring to fig. 1 to 8, a temperature sensor for a large steam turbine according to an embodiment of the present utility model includes a mounting case 10, a temperature probe 20, and a tailstock 30.

The installation shell 10 is suitable for being installed on a steam turbine, the installation mode of the installation shell can be threaded connection or other connection types, the rear end of the installation shell 10 is provided with an installation cavity 101, the installation of the temperature measuring probe 20 is facilitated, and the bottom of the installation cavity 101 is provided with a through hole. Facilitating extension of the temperature probe 20.

The tail end of the temperature measurement probe 20 is arranged in the mounting cavity 101, the front end of the temperature measurement probe passes through the through hole and extends to the outer side of the mounting shell 10, and the tail end of the temperature measurement probe 20 is provided with a plurality of contact pins 201.

The tail seat 30 is disposed at the tail end of the installation shell 10 and can be adjusted along the length direction of the installation shell 10, the front end of the tail seat 30 is provided with a plurality of needle sleeves 301, and a plurality of pins 201 are inserted into the needle sleeves 301 in a one-to-one opposite manner. The tailstock 30 is connected with wires for facilitating the transmission of temperature data to a display device.

Wherein, each needle sleeve 301 is provided with an elastic contact piece 302, the elastic contact pieces 302 can stretch and retract along the length direction of the needle sleeve 301, and the end of the contact pin 201 is abutted against the elastic contact pieces 302. The force of abutment between the pins 201 and the spring contacts 302 can be adjusted by adjusting the position of the tail stock 30.

Based on the above, by arranging the elastic contact piece 302 in the needle sleeve 301, when the contact pin 201 is vibrated, the elastic contact piece 302 is extruded, the elastic contact piece 302 can be contracted due to extrusion, so that the contact piece or the contact pin 201 is prevented from being damaged due to extrusion, and meanwhile, the elastic force of the elastic contact piece 302 can enable the elastic contact piece 302 to be stably abutted against the contact pin 201, so that the contact breaking caused by vibration is avoided.

Preferably, in one embodiment of the present utility model, the elastic contact 302 includes an electrode pad 3021 and a spring 3022.

The electrode plate 3021 is disposed in the needle sheath 301, and the end of the contact pin 201 abuts against the electrode plate 3021.

The spring 3022 is disposed in the needle sheath 301, and the electrode pad 3021 is disposed on the spring 3022 and is movable along with the expansion or contraction of the spring 3022.

In this way, the contact pin 201 is abutted against the electrode plate 3021, so that temperature data detected by the temperature measurement probe 20 can be conveniently transmitted, and the contact pin 201 can displace when receiving vibration, so that the spring 3022 is pushed to compress or stretch, stable connection between the contact pin 201 and the electrode plate 3021 is ensured, and extrusion damage of the contact pin 201 due to vibration can be avoided.

Preferably, in one embodiment of the present utility model, the front end of the electrode pad 3021 is formed with a slot 3023, and the end of the pin 201 is inserted into the slot 3023.

In this way, by forming the slot 3023 at the front end of the electrode pad 3021, the insertion of the pin 201 may be facilitated, and meanwhile, the pin 201 is prevented from being scratched to one side due to vibration, thereby causing disconnection, and effectively increasing the stability of the connection between the pin 201 and the electrode pad 3021.

Preferably, in one embodiment of the present utility model, a plurality of holding pieces 3024 are disposed on a side wall of the slot 3023, the plurality of holding pieces 3024 extend along a depth direction of the slot 3023 and are circumferentially spaced apart along a wall of the slot 3023, and the plurality of holding pieces 3024 are respectively held against the surface of the pin 201.

In this way, after the pin 201 is inserted into the slot 3023, the plurality of holding pieces 3024 may be stably held against the surface of the pin 201, so as to achieve a larger area of contact, so that the signal transmission is more stable, and it should be noted that the holding pieces 3024 are tightly connected with the slot wall of the slot 3023, for example, are integrally formed with the electrode piece 3021, so that the transmission of the power signal is more facilitated.

Preferably, in one embodiment of the present utility model, each of the holding pieces 3024 is formed in an arc shape, and both ends of the holding piece 3024 are connected to the wall of the slot 3023.

It should be noted that, the holding pieces 3024 are elastic, so, after the pins 201 are inserted into the slots 3023, the arc-shaped top of the holding pieces 3024 may be held to deform to one side of the slot wall of the slots 3023, so that the pins 201 are pressed to be inserted into the slots 3023 more firmly, and the stability of contact is ensured.

Preferably, in one embodiment of the present utility model, a sealing portion 202 is disposed at the tail end of the temperature probe 20, and a sealing pad 203 is disposed at the front end of the sealing portion 202, where the sealing pad 203 abuts against the bottom of the mounting cavity 101 to seal the through hole.

Therefore, by providing the sealing portion 202, after the temperature probe 20 is installed in the installation cavity 101, the periphery of the through hole can be sealed, so that other foreign matters are prevented from entering the sensor, and the sensor has a simple overall structure and good sealing performance.

Preferably, in one embodiment of the present utility model, the bottom wall of the installation cavity 101 is provided with a sealing groove 1011, the sealing groove 1011 extends along the circumferential direction of the through hole, the surface of the gasket 203 is provided with a sealing rib 2031, the sealing rib 2031 extends along the circumferential direction of the gasket 203, and the sealing rib 2031 is provided in the sealing groove 1011.

In this way, by providing the seal groove 1011 and providing the seal rib 2031 on the surface of the gasket 203, the seal rib 2031 can be provided in the seal groove 1011 after the temperature probe 20 is mounted, thereby forming a seal, and the gasket 203 is made of rubber.

Preferably, in one embodiment of the present utility model, the temperature measuring probe further includes a pressing member 102, where the pressing member 102 has a tubular structure, one end of the pressing member 102 is disposed in the mounting cavity 101 and is in threaded connection with a side wall of the mounting cavity 101, and the other end of the pressing member 102 is pressed against the tail end of the temperature measuring probe 20.

Thus, since the pressing member 102 is in a tubular structure, after installation, the contact pin 201 may be located inside the pressing member 102, and one end of the pressing member 102 is disposed in the installation cavity 101 and is in threaded connection with the side wall of the installation cavity 101, and the other end of the pressing member 102 is pressed against the tail end of the temperature measurement probe 20, the temperature measurement probe 20 can be pressed against, so that the sealing pad 203 is pressed against around the through hole firmly, sealing is more stable and reliable, and the pressing member 102 can also move back and forth, thereby adjusting the pressing force.

Preferably, in one embodiment of the present utility model, an annular groove 303 is provided on the surface of the tailstock 30, the annular groove 303 extends along the circumferential direction of the tailstock 30, a connecting member 304 is sleeved on the annular groove 303, the connecting member 304 extends along the circumferential direction of the tailstock 30, and the connecting member 304 is in threaded connection with the rear end of the mounting shell 10.

Thus, by providing the connecting piece 304, and the connecting piece 304 is screwed with the rear end of the installation shell 10, the tailstock 30 can be connected to the installation shell 10, and the connection manner is stable and reliable.

Preferably, in one embodiment of the present utility model, a plurality of limiting ribs 3041 are provided on the outer side of the tailstock 30, and the plurality of limiting ribs 3041 extend along the length direction of the tailstock 30 and are circumferentially spaced apart along the tailstock 30;

the inner wall of the pressing member 102 is provided with a plurality of limiting grooves 1021, a plurality of limiting grooves 1021 are distributed at intervals along the circumferential direction of the pressing member 102, and the limiting ribs 3041 are inserted into the limiting grooves 1021.

Thus, by providing the limiting groove 1021 and providing a plurality of limiting ribs 3041 on the outer side of the tailstock 30, when the tailstock 30 is mounted, the plurality of limiting ribs 3041 are respectively inserted into the limiting groove 1021, so that the tailstock 30 does not follow rotation when the connecting piece 304 is rotated.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims (10)

1. A temperature sensor for a large steam turbine, comprising:

the installation shell is suitable for being installed on a steam turbine, an installation cavity is formed in the rear end of the installation shell, and a through hole is formed in the bottom of the installation cavity;

the tail end of the temperature measurement probe is arranged in the mounting cavity, the front end of the temperature measurement probe penetrates through the through hole and extends to the outer side of the mounting shell, and the tail end of the temperature measurement probe is provided with a plurality of contact pins;

the tail seat is arranged at the tail end of the installation shell and can be adjusted along the length direction of the installation shell, the front end of the tail seat is provided with a plurality of needle sleeves, and a plurality of contact pins are inserted in the needle sleeves in a one-to-one opposite mode;

and each needle sleeve is internally provided with an elastic contact piece, the elastic contact pieces can stretch and retract along the length direction of the needle sleeve, and the end parts of the contact pins are abutted against the elastic contact pieces.

2. The temperature sensor for a large turbine according to claim 1, wherein the elastic contact piece comprises:

the electrode plate is arranged in the needle sleeve, and the end part of the contact pin is propped against the electrode plate;

the spring is arranged in the needle sleeve, and the electrode plate is arranged on the spring and can move along with the expansion or contraction of the spring.

3. The temperature sensor for a large turbine according to claim 2, wherein the tip of the electrode plate is formed with a slot, and the pin end is inserted into the slot.

4. A temperature sensor for a large turbine according to claim 3, wherein a plurality of holding pieces are provided on the side wall of the slot, a plurality of the holding pieces extend in the depth direction of the slot and are circumferentially spaced apart along the slot wall, and the holding pieces are respectively held against the pin surface.

5. The temperature sensor for a large turbine according to claim 4, wherein each of said holding pieces is formed in an arc shape, and both ends of said holding piece are connected to the slot wall.

6. The temperature sensor for a large steam turbine according to claim 1, wherein a sealing part is arranged at the tail end of the temperature measuring probe, a sealing gasket is arranged at the front end of the sealing part, and the sealing gasket is abutted against the bottom of the installation cavity to seal the through hole.

7. The temperature sensor for a large turbine according to claim 6, wherein the bottom wall of the installation cavity is provided with a sealing groove, the sealing groove extends along the circumferential direction of the through hole, the surface of the sealing gasket is provided with a sealing rib, the sealing rib extends along the circumferential direction of the sealing gasket, and the sealing rib is arranged in the sealing groove.

8. The temperature sensor for a large steam turbine according to claim 1, further comprising a pressing member, wherein the pressing member has a tubular structure, one end of the pressing member is disposed in the mounting cavity and is in threaded connection with the side wall of the mounting cavity, and the other end of the pressing member is pressed against the tail end of the temperature measuring probe.

9. The temperature sensor for a large turbine according to claim 8, wherein the surface of the tailstock is provided with an annular groove, the annular groove extends along the circumferential direction of the tailstock, a connecting piece is sleeved on the annular groove, the connecting piece extends along the circumferential direction of the tailstock, and the connecting piece is in threaded connection with the rear end of the mounting shell.

10. The temperature sensor for a large turbine according to claim 9, wherein a plurality of limit ribs are arranged on the outer side of the tailstock, extend along the length direction of the tailstock, and are distributed at intervals along the circumferential direction of the tailstock;

the inner wall of the pressing piece is provided with a plurality of limiting grooves, the limiting grooves are distributed at intervals along the circumferential direction of the pressing piece, and the limiting ribs are inserted into the limiting grooves.