CN218673967U

CN218673967U - Photoelectric integrated transformer oil surface temperature sensor

Info

Publication number: CN218673967U
Application number: CN202220856914.8U
Authority: CN
Inventors: 李泽平; 何丽
Original assignee: Shenzhen Akefa Advanced Technology Co ltd
Current assignee: Shenzhen Akefa Advanced Technology Co ltd
Priority date: 2022-04-14
Filing date: 2022-04-14
Publication date: 2023-03-21
Anticipated expiration: 2032-04-14

Abstract

The utility model belongs to the technical field of transformer secondary control technique and specifically relates to be photoelectric integral type transformer oil level temperature sensor, probe fixing base, protecting pipe, optical cable, connector, wire and terminal including the temperature, the one end of temperature probe is connected with the protecting pipe, the temperature probes the cover and is equipped with the probe fixing base on the outer anchor ring of one end that is close to the protecting pipe, the probe fixing base includes first flat pad, lock nut, the flat pad of second, double-end blade, retaining member and dust cover, the through-hole has been seted up at the outer anchor ring top of temperature probe, the temperature probe in have optical temperature sensing probe and electricity temperature sensing probe, the utility model discloses a design can be through the analytic current ambient temperature of the change of temperature sensing material optical property, optical signal measurement reliability is high, longe-lived and to electromagnetic interference complete immunity, is comparatively ideal temperature monitoring means under this scene.

Description

Photoelectric integrated transformer oil surface temperature sensor

Technical Field

The utility model relates to a transformer secondary control technical field specifically is photoelectric integral type transformer oil level temperature sensor.

Background

The power transformer is one of main devices for transmitting electric energy from a power generation end to a power receiving end link, basically all the electric energy above 30kV is an oil-immersed transformer, transformer oil is used as an insulating, heat-dissipating and arc-extinguishing medium, and plays an important role in safe operation of the transformer, if the oil temperature of the transformer is too high, breakdown accidents can be caused by reduction of the insulating property, and the service life of the transformer can be influenced, so that online monitoring of the oil temperature of the transformer is particularly important for the safety and the service life of the transformer.

The temperature of a winding and an iron core of a large-sized, high-voltage or large-capacity oil immersed transformer is generally directly monitored, a small-sized oil immersed transformer is generally provided with an oil well at the top end of the transformer, the oil temperature in the transformer is indirectly inferred by measuring the temperature in the oil well, the sensor is called as a transformer oil surface thermometer, and the current transformer oil surface temperature measuring method comprises the following steps: three types of temperature measurement are pressure type temperature measurement, RTD temperature measurement, and optical fiber temperature measurement which has come into use in recent years.

The pressure type temperature measurement is based on the principle that the expansion coefficients of liquid are different due to different temperatures. The current temperature of liquid is calculated through the fluid pressure that senses, this kind of measurement sensor work after a period, elastic element produces the plastic deformation temperature and can produce great error, and elastic element's slight wound will all produce great error to the measuring result, RTD temperature measurement sets up a PT100 platinum resistance on transformer oil level thermometer top, the resistance increases along with the temperature increases progressively, through calculating the change of sensor resistance and deriving corresponding temperature, RTD temperature sensor responds slowly, receive electromagnetic interference difference easily, and because the life-span that self structure principle causes is not long.

Therefore, a photoelectric integrated transformer oil surface temperature sensor is needed to improve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a photoelectric integrated transformer oil level temperature sensor to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

photoelectric integrated transformer oil surface temperature sensor, including temperature probe, probe fixing base, protecting pipe, optical cable, connector, wire and terminal, the one end of temperature probe is connected with the protecting pipe, the temperature probe is close to the outer anchor ring of the one end of protecting pipe and is overlapped and is equipped with probe fixing base, probe fixing base includes first flat pad, lock nut, the flat pad of second, double-end blade, retaining member and dust cover, the through-hole has been seted up at the outer anchor ring top of temperature probe, the temperature probe in have optical temperature sensing probe and electricity temperature sensing probe, the screw hole has been seted up at the outer anchor ring top of one end that the temperature probe is close to electricity temperature sensing probe, optical temperature sensing probe contains temperature sensing material, optical temperature sensing probe sheath and first epoxy heat-conducting glue, electricity temperature sensing probe contains temperature sensing chip, electricity temperature sensing probe sheath and second epoxy heat-conducting glue, first fastener and fourth fastener have respectively at the protecting pipe both ends, be equipped with second fastener, third fastener and screw on the first fastener, the optical cable contains optical cable, aramid fiber cover and fiber cover, wire contains metal wire and three-wire.

As the utility model discloses preferred scheme, the protecting pipe is the nonrust corrugated steel pipe, the one end top cover of protecting pipe is equipped with fifth fastener, fifth fastener is inlayed by the sixth fastener and is formed on the seventh fastener.

As a preferred aspect of the present invention, the sheath tube is fixed to the temperature probe tube by a first fastener, and the sheath tube is fixed to the external device by a fourth fastener.

As the utility model discloses preferred scheme, the third fastener passes through the screw and twists in the second fastener screwed hole, two fixed orificess that the outside foraminiferous footpath size of second fastener is unanimous with the screw hole on the temperature probe, the fifth fastener pushes the front end that makes in the temperature probe directly send optical temperature-sensing probe and electricity temperature-sensing probe and flushes with temperature probe top, the fixed orifices of second fastener aligns with the screw hole of temperature probe, the screw is twisted and is fixed on the fifth fastener after passing two layers of hole back lock.

As the preferred scheme of the utility model, optics temperature-sensing probe and electricity temperature-sensing probe are the temperature sensor of different grade type.

As the utility model discloses preferred scheme, the temperature sensing material is fixed on the optic fibre top, just optic fibre, optical cable optic fibre oversheath, aramid fiber and optic fibre inner sheath pass through the encapsulation of first epoxy heat-conducting glue inside the optics temperature sensing probe sheath.

As the preferred scheme of the utility model, optics temperature sensing probe sheath and electricity temperature sensing probe sheath are the metalwork that the heat conductivity is good.

As the utility model discloses preferred scheme, the temperature sensing chip is fixed on three-wire system wire top, just temperature sensing chip, wire sheath and three-wire system wire pass through the encapsulation of second epoxy heat-conducting glue inside electricity temperature sensing probe sheath.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses in, visit pipe fixing base, protecting tube cover, optical cable, connector, plain conductor, terminal, optics temperature-sensing probe and electricity temperature-sensing probe through the temperature that sets up for this equipment has two temperature sensor in same protecting tube: the RTD temperature sensor based on electrical measurement and the optical fiber temperature sensor based on optical measurement are subjected to temperature calibration in the same standard temperature calibration furnace when leaving a factory, the optical fiber temperature sensor is not interfered by external environment, thermal failure stress does not exist, a self-diagnosis function can be completed after the optical fiber temperature sensor and a system are combined, and the two sensors can be calibrated in a stepless mode when in use and are mutually standby.

Drawings

FIG. 1 is a schematic diagram of an oil surface temperature sensor of a photoelectric integrated transformer;

FIG. 2 is a cross-sectional view of the probe tube and probe head;

FIG. 3 is a sectional view of a temperature sensitive probe;

FIG. 4 shows a structure of a photoelectric integrated transformer oil surface temperature sensor;

fig. 5 is a schematic view of the installation of a photoelectric integrated transformer oil surface temperature sensor.

In the figure: 1. a temperature probe; 11. a through hole; 12. a screw hole; 2. a probe tube fixing seat; 21. a first flat pad; 22. locking the nut; 23. a second flat pad; 24. double-end cutting edges; 25. a locking member; 26. a dust cover; 3. sheathing a pipe; 31. a first fastener; 311. a second fastener; 312. a third fastener; 313. a screw; 32. a fourth fastener; 314. a fifth fastener; 3141. a sixth fastener; 3142. a seventh fastener; 4. an optical cable; 41. an optical cable fiber outer sheath; 42. aramid fiber; 43. an optical fiber; 44. an optical fiber inner sheath; 5. a connector; 6. a metal wire; 61. a metal wire sheath; 62. a three-wire system metal wire; 7. a terminal; 8. an optical temperature sensing probe; 81. a temperature sensitive substance; 82. an optical temperature sensing probe sheath; 83. a first epoxy heat-conducting adhesive; 9. an electrical temperature sensing probe; 91. a temperature sensing chip; 92. a sheath of the electric temperature sensing probe; 93. and a second epoxy heat-conducting adhesive.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the scope of the present invention based on the embodiments of the present invention.

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Several embodiments of the present invention are presented. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1-5, the present invention provides a technical solution:

photoelectric integrated transformer oil level temperature sensor, including temperature probe 1, probe fixing base 2, protecting pipe 3, optical cable 4, connector 5, metal wire 6 and terminal 7, the one end of temperature probe 1 is connected with protecting pipe 3, the temperature probe 1 is close to the one end outer anchor ring of protecting pipe 3 and is overlapped and is equipped with probe fixing base 2, probe fixing base 2 includes first flat pad 21, lock nut 22, the flat pad 23 of second, double-end blade 24, retaining member 25 and dust cover 26, through-hole 11 has been seted up at the outer anchor ring top of temperature probe 1, temperature probe 1 in have optical temperature sensing probe 8 and electricity temperature sensing probe 9, screw hole 12 has been seted up at the outer anchor ring top of one end that temperature probe 1 is close to electricity temperature sensing probe 9, optical probe 8 contains temperature sensing material 81, optical temperature sensing probe sheath 82 and first epoxy heat-conducting glue 83, electricity probe 9 includes temperature sensing chip 91, electricity probe 92 and second epoxy heat-conducting glue 93, there are first fastener 31 and fourth fastener 32 respectively at 3 both ends, be equipped with the second fastener 31 on the first temperature sensing fastener 31, third temperature sensing probe 31 and temperature sensing cable screw sheath 41 contain temperature sensing wire 41 and metal wire 41, temperature sensing wire 41, aramid fiber cable wire 41 and metal wire 41.

Further, the sheathing tube 3 is a stainless steel corrugated tube, a fifth fastening member 314 is sleeved on the top of one end of the sheathing tube 3, and the fifth fastening member 314 is formed by inlaying a sixth fastening member 3141 on a seventh fastening member 3142.

Further, the sheathing tube 3 is fixed to the temperature probe 1 by a first fastener 31, and the sheathing tube 3 is fixed to an external device by a fourth fastener 32.

Furthermore, a third fastening member 312 is screwed into a threaded hole of the second fastening member 311 through threads, two fixing holes with the aperture size consistent with that of the threaded hole 12 on the temperature probe 1 are formed in the outer portion of the second fastening member 311, the fifth fastening member 314 is pushed into the temperature probe 1 to enable the front ends of the optical temperature sensing probe 8 and the electrical temperature sensing probe 9 to be flush with the top end of the temperature probe 1, the fixing holes of the second fastening member 311 are aligned with the threaded holes 12 of the temperature probe 1, and a screw 313 is screwed into the two layers of holes and then locked on the fifth fastening member 314 to be fixed.

Further, the optical temperature sensing probe 8 and the electrical temperature sensing probe 9 are different types of temperature sensors.

Further, the temperature sensing substance 81 is fixed at the top end of the optical fiber 43, and the optical fiber 43, the optical cable optical fiber outer sheath 41, the aramid fiber 42 and the optical fiber inner sheath 44 are encapsulated inside the optical temperature sensing probe sheath 82 through the first epoxy heat-conducting glue 83.

Further, the optical temperature-sensitive probe sheath 82 and the electric temperature-sensitive probe sheath 92 are metal members having good thermal conductivity.

Further, the temperature sensing chip 91 is fixed on the top end of the three-wire metal lead 62, and the temperature sensing chip 91, the metal lead sheath 61 and the three-wire metal lead 62 are encapsulated inside the electric temperature sensing probe sheath 92 by the second epoxy thermal conductive adhesive 93.

In an embodiment, referring to fig. 1 to 5, the temperature probe 1 is used to protect and fix the optical temperature sensing probe 8 and the electrical temperature sensing probe 9, so that the probes can be fixed at a detected position for measuring temperature, and meanwhile, the damage of the temperature probes caused by external factors can be avoided, and the protective sleeve 3 is used to protect the optical cable 4 and the metal wire 6, thereby ensuring long-term use in outdoor environment.

In an embodiment, referring to fig. 3, a temperature sensing substance 81 is fixed at the top end of an optical fiber 43, and then an optical fiber outer sheath 41, an aramid fiber 42, an optical fiber inner sheath 44, and an optical fiber 43 temperature sensing substance are encapsulated inside a temperature sensing probe sheath 82 by using an epoxy thermal conductive adhesive 83. Similarly, the temperature sensing chip 91 is fixed on the top end of the three-wire metal wire 62, and then the metal wire sheath 61, the temperature sensing chip 91 and the three-wire metal wire 62 are encapsulated inside the temperature sensing probe sheath 92 by using the epoxy heat-conducting glue 93, so that the electronic temperature sensor and the optical fiber temperature sensor can simultaneously measure the temperature.

In the embodiment, referring to fig. 1, 2, 4 and 5, the probe fixing seat 2 fixes the temperature probe 1 on the upper arm of the transformer oil well and completes sealing, the locking nut 22 of the probe fixing seat 2 cooperates with the flat gasket 21 to fix the temperature probe 1 on the upper wall of the transformer oil well primarily, then the locking member 25 is screwed, the locking member 25 cooperates with the double-end cutting edge 24 and the flat gasket 23 to completely lock and seal the probe 1, and the dust cover 26 above is used for dust and water sealing.

The working principle is as follows: when the temperature sensing probe is used, firstly, the fastening piece 3141 is embedded in the fastening piece 3142 to form the fastening piece 314, the fastening piece 314 is sleeved at the top end of the protective sleeve 3, the optical cable 4 and the metal lead 6 penetrate through the fastening piece 314 to fix the optical cable 4 and the metal lead 6, the temperature sensing substance 81 is fixed at the top end of the optical fiber 43 inside the optical cable, then the epoxy heat conducting glue 83 is used for being packaged inside the temperature sensing probe protective sleeve 82 to form the optical temperature sensing probe 8, similarly, after the metal lead 6 penetrates through the fastening piece 314, the temperature sensing chip 91 is fixed at the top end of the three-wire metal lead 62 inside the metal lead, then the epoxy heat conducting glue 93 is used for being packaged inside the temperature sensing probe protective sleeve 92 to form the electric temperature sensing probe 9, the optical temperature sensing probe 8 and the electric temperature sensing probe 9 are arranged inside the temperature sensing probe 1 and flush with the top end of the temperature sensing probe 1, so as to detect the temperature of the oil entering from the through hole 11 and the top end of the temperature sensing probe 1, and have certain popularization value.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Photoelectric integrated transformer oil level temperature sensor, visit pipe fixing base (2), protecting sleeve (3), optical cable (4), connector (5), metallic conductor (6) and terminal (7), its characterized in that including the temperature: the temperature sensing probe comprises a temperature sensing probe (1), a protective sleeve (3) is connected to one end of the temperature sensing probe (1), a probe fixing seat (2) is sleeved on the outer annular surface of one end, close to the protective sleeve (3), of the temperature sensing probe (1), the probe fixing seat (2) comprises a first flat pad (21), a locking nut (22), a second flat pad (23), a double-end cutting edge (24), a locking piece (25) and a dust cover (26), a through hole (11) is formed in the top of the outer annular surface of the temperature sensing probe (1), an optical temperature sensing probe (8) and an electrical temperature sensing probe (9) are arranged in the temperature sensing probe (1), a screw hole (12) is formed in the top of the outer annular surface of one end, close to the electrical temperature sensing probe (9), the optical temperature sensing probe (8) comprises a temperature sensing substance (81), an optical temperature sensing probe protective sleeve (82) and first epoxy heat-conducting glue (83), the temperature sensing probe (9) comprises a temperature sensing chip (91), an electrical probe (92) and second epoxy heat-conducting glue (93), a first optical fiber fastening piece (31) and a fourth optical fiber fastening piece (31), a second optical fiber fastening piece (313) and a third optical fiber fastening piece (311) and a fourth optical fiber fastening piece (31), a third optical fiber fastening piece (311) are arranged on the temperature sensing probe (3), a third optical fiber fastening piece (31), a fourth optical fiber fastening piece (31), a third optical fiber fastening piece (311), a fourth optical fiber fastening piece (31) and a fourth optical fiber fastening piece (31) are arranged on the optical fiber fastening piece (31) and a third optical fiber fastening piece (31) and a fourth optical fiber cable (31) which are arranged on the temperature sensing probe piece (11) which are arranged on the temperature sensing probe and a third optical fiber, aramid fiber (42), an optical fiber inner sheath (44), and an optical fiber (43), the metal wire (6) including a metal wire sheath (61) and a three-wire metal wire (62).

2. The photoelectric integrated transformer oil level temperature sensor according to claim 1, characterized in that: the protective sleeve (3) is a stainless steel corrugated pipe, a fifth fastening piece (314) is sleeved at the top of one end of the protective sleeve (3), and the fifth fastening piece (314) is formed by inlaying a sixth fastening piece (3141) on a seventh fastening piece (3142).

3. The photoelectric integrated transformer oil level temperature sensor according to claim 1, characterized in that: the protective sleeve (3) is fixed on the temperature probe (1) through a first fastener (31), and the protective sleeve (3) is fixed on external equipment through a fourth fastener (32).

4. The photoelectric integrated transformer oil level temperature sensor according to claim 1, characterized in that: the third fastening piece (312) is screwed into a threaded hole of the second fastening piece (311) through threads, two fixing holes with the hole diameters being the same as those of screw holes (12) in the temperature probe tube (1) are formed in the outer portion of the second fastening piece (311), the fifth fastening piece (314) is pushed into the temperature probe tube (1) to enable the front end of the direct optical temperature sensing probe (8) and the front end of the electrical temperature sensing probe (9) to be flush with the top end of the temperature probe tube (1), the fixing holes of the second fastening piece (311) are aligned with the screw holes (12) in the temperature probe tube (1), and the screws (313) are locked on the fifth fastening piece (314) to be fixed after being screwed into the two layers of holes.

5. The photoelectric integrated transformer oil level temperature sensor according to claim 3, characterized in that: the optical temperature sensing probe (8) and the electric temperature sensing probe (9) are different types of temperature sensors.

6. The photoelectric integrated transformer oil level temperature sensor according to claim 1, characterized in that: the temperature sensing substance (81) is fixed at the top end of the optical fiber (43), and the optical fiber (43), the optical cable and optical fiber outer sheath (41), the aramid fiber (42) and the optical fiber inner sheath (44) are packaged inside the optical temperature sensing probe sheath (82) through the first epoxy heat-conducting glue (83).

7. The photoelectric integrated transformer oil level temperature sensor according to claim 1, characterized in that: the optical temperature-sensing probe sheath (82) and the electric temperature-sensing probe sheath (92) are metal pieces with good thermal conductivity.

8. The photoelectric integrated transformer oil level temperature sensor according to claim 1, characterized in that: the temperature sensing chip (91) is fixed at the top end of the three-wire metal lead (62), and the temperature sensing chip (91), the metal lead sheath (61) and the three-wire metal lead (62) are packaged inside the electric temperature sensing probe sheath (92) through second epoxy heat-conducting glue (93).