阅读说明：本技术 一种变压器温控器用液体介质热模拟装置 (Liquid medium thermal simulation device for transformer temperature controller ) 是由 肖玉斌 史纯清 罗家猛 王姣 杨肖 夏宁鸿 于 2020-05-06 设计创作，主要内容包括：本发明公开了一种变压器温控器用液体介质热模拟装置,包括测温主机、CT调节装置、保护管、光纤和热模拟装置,测温主机连接有CT调节装置,CT调节装置连接到CT输入电线,光纤置于保护管内,两端分别连接到测温主机和光纤测温探头,热模拟装置置于变压器油箱内且通过安装座可拆卸地固定连接在变压器油箱顶部,热模拟装置连接到CT调节装置,光纤测温探头插入到热模拟装置内,保护管可拆卸地连接在安装座和测温主机上。本发明各个模块采用可拆卸的连接结构,损坏其中一个模块,直接更换独立模块,便于维修,维修成本低。(The invention discloses a liquid medium thermal simulation device for a transformer temperature controller, which comprises a temperature measurement host, a CT adjusting device, a protection tube, an optical fiber and a thermal simulation device, wherein the temperature measurement host is connected with the CT adjusting device, the CT adjusting device is connected to a CT input wire, the optical fiber is arranged in the protection tube, two ends of the optical fiber are respectively connected to the temperature measurement host and an optical fiber temperature measurement probe, the thermal simulation device is arranged in a transformer oil tank and detachably and fixedly connected to the top of the transformer oil tank through a mounting seat, the thermal simulation device is connected to the CT adjusting device, the optical fiber temperature measurement probe is inserted into the thermal simulation device, and the protection tube is detachably connected to. According to the invention, each module adopts a detachable connection structure, one module is damaged, and the independent module is directly replaced, so that the maintenance is convenient, and the maintenance cost is low.)

1. The utility model provides a liquid medium thermal simulation device for transformer temperature controller which characterized in that: including temperature measurement host computer (1), CT adjusting device (2), protection tube (3), optic fibre (4) and thermal simulation device (5), temperature measurement host computer (1) is connected with CT adjusting device (2), CT adjusting device (2) are connected to CT input electric wire, protection tube (3) are arranged in optic fibre (4), both ends are connected to temperature measurement host computer (1) and optic fibre temperature probe (6) respectively, thermal simulation device (5) are arranged in the transformer tank and are passed through mount pad (7) detachably fixed connection at transformer tank top, thermal simulation device (5) are connected to CT adjusting device (2), optic fibre temperature probe (6) are inserted in thermal simulation device (5), protection tube (3) detachably is connected on mount pad (7) and temperature measurement host computer (1).

2. The liquid medium thermal simulation device for the transformer temperature controller according to claim 1, wherein: the thermal simulation device (5) comprises an outer protective cover (8), a heating coil (9) and a protective cover bottom sealing plate (10) which are made of metal materials, the lower end of the outer protective cover (8) is opened, a temperature measurement blind hole (19) for inserting an optical fiber temperature measurement probe is formed in the upper portion of the outer protective cover, the heating coil (9) is arranged in an inner cavity of the outer protective cover (8), a liquid temperature conducting medium (10) is filled in the inner cavity of the outer protective cover (8), and the protective cover bottom sealing plate (10) is connected to the bottom end of the outer protective cover.

3. The liquid medium thermal simulation device for the transformer temperature controller according to claim 2, wherein: the heating coil (9) is of a U-shaped structure, and the temperature measuring blind hole (19) is positioned in the middle of the heating coil (9).

4. The liquid medium thermal simulation device for the transformer temperature controller according to claim 2, wherein: the temperature measuring blind hole (19) and the outer protective cover (8) are of an integral structure and are made of copper materials.

5. The liquid medium thermal simulation device for the transformer temperature controller according to claim 2, wherein: the lead of the heating coil (9) is connected to the CT adjusting device (2), and the lead of the heating coil (9) is led out of the upper part of the outer protective cover (8) and sealed by high-temperature sealant.

6. The liquid medium thermal simulation device for the transformer temperature controller according to claim 2, wherein: the temperature measuring blind hole (19) is filled with heat-conducting silicone grease after being inserted into the optical fiber temperature measuring probe (6) and is sealed by temperature-resistant silicone.

7. The liquid medium thermal simulation device for the transformer temperature controller according to claim 1, wherein: the mounting seat (7) comprises an optical fiber protection cover (11), an elongated tube (12) and a mounting nut (13), the lower end of the optical fiber protection cover (11) is fixedly connected to the upper end of the thermal simulation device (5), the upper end of the optical fiber protection cover is fixedly connected with the elongated tube (12), the mounting nut (13) is tightly fastened on the elongated tube (12) through a mounting screw (14) and a sealing rubber ring (15) in a sealing mode, the upper end of the elongated tube (12) is connected with a metal hose connector (16), and the metal hose connector (16) is connected to the protection tube (3) through a metal hose fixing piece (17).

8. The liquid medium thermal simulation device for the transformer temperature controller according to claim 7, wherein: the upper section of the protection tube (3) and the part of the mounting seat (7) above the mounting nut (13) are sleeved with a waterproof shrinkage tube.

9. The liquid medium thermal simulation device for the transformer temperature controller according to claim 7, wherein: the optical fiber protective cover (11) is connected to the threaded part at the upper end of the outer protective cover (8) of the thermal simulation device (5) through threads and is sealed by a sealing rubber ring II (18).

10. The liquid medium thermal simulation device for the transformer temperature controller according to claim 1, wherein: the temperature measurement host (1) is arranged on the outer wall of the transformer host.

Technical Field

The invention relates to a liquid medium thermal simulation device for a transformer temperature controller, and belongs to the technical field of transformer temperature controllers.

Background

The traditional winding temperature controller for the transformer uses the temperature measuring principle of a pressure type temperature controller, and volume expansion or pressure change generated after liquid and gas in a closed container are heated is used as a temperature measuring signal. The disadvantages of such a thermostat are the following:

1) the heat loss is large. Because the instrument sealing system (a bulb, a capillary tube and a spring tube) of the traditional temperature controller for the transformer is made of metal, the heat of a temperature measuring point can be naturally dissipated, so that the heat balance time is long, and the temperature of a measured object can not be accurately reflected in a short time;

2) the response speed is slow. Because the traditional temperature controller for the transformer adopts a pressure type, the time for the internal pressure and the external pressure to reach the equilibrium is long, and the response speed is slow;

3) damage to the instrument sealing system (bulb, capillary, spring tube) is difficult to repair. If the instrument sealing system is damaged, the liquid and gas in the instrument sealing system can be leaked, and only the temperature controller can be replaced;

4) the measurement precision is greatly influenced by external factors such as environment temperature, atmospheric pressure and the like;

5) the accuracy is relatively low. Due to mechanical characteristics and principle limitations;

6) the capillary transport distance is limited. The longer the capillary tube, the more liquid, gas stored inside, the lower the meter accuracy.

The optical fiber temperature measuring device for the transformer can directly measure the temperature of a transformer winding, but optical fiber pre-embedding and penetration device pre-welding are required to be carried out according to the particularity of optical fiber temperature measurement in the design and production of the transformer, and the installation of the optical fiber temperature measurement after the production of the transformer is almost impossible.

The Chinese patent application (with the application number of 201910302699. X) provides a transformer temperature controller based on optical fiber temperature measurement, and a thermal simulation device has the defects of uneven conduction in the temperature measurement process, poor stability of the measured temperature of an optical fiber temperature measurement probe, low accuracy of measured data and inconvenience in assembly, disassembly and replacement of all parts.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the utility model provides a liquid medium thermal simulation device for transformer temperature controller to solve the problem that exists among the above-mentioned prior art.

The technical scheme adopted by the invention is as follows: the utility model provides a liquid medium thermal simulation device for transformer temperature controller, including the temperature measurement host computer, CT adjusting device, the protection tube, optic fibre and thermal simulation device, the temperature measurement host computer is connected with CT adjusting device, CT adjusting device is connected to CT input electric wire, optic fibre is arranged in the protection tube, both ends are connected to temperature measurement host computer and optic fibre temperature probe respectively, thermal simulation device arranges in the transformer tank and through mount pad detachably fixed connection at transformer tank top, thermal simulation device is connected to CT adjusting device, optic fibre temperature probe inserts in the thermal simulation device, protection tube detachably connects on mount pad and temperature measurement host computer.

Preferably, the thermal simulation device comprises an outer protective cover, a heating coil and a protective cover bottom sealing plate, wherein the outer protective cover is made of metal materials, the lower end of the outer protective cover is open, a temperature measuring blind hole in which an optical fiber temperature measuring probe is inserted is formed in the upper portion of the outer protective cover, the heating coil is arranged in an inner cavity of the outer protective cover, a liquid temperature conducting medium is contained in the inner cavity of the outer protective cover, and the protective cover bottom sealing plate is connected to the.

Preferably, the heating coil is of a U-shaped structure, and the temperature measuring blind hole is located in the middle of the heating coil.

Preferably, the temperature measuring blind hole and the outer protective cover are of an integrated structure and are made of copper materials.

Preferably, the lead wire of the heating coil is connected to the CT adjusting device, and the lead wire of the heating coil is led out of the upper part of the outer protective cover and sealed by high-temperature sealant.

Preferably, the temperature measuring blind hole is filled with heat-conducting silicone grease after being inserted into the optical fiber temperature measuring probe, and is sealed by using temperature-resistant silicone.

Preferably, the installation base comprises an optical fiber protection cover, a long guide pipe and an installation nut, the lower end of the optical fiber protection cover is fixedly connected to the upper end of the thermal simulation device, the upper end of the optical fiber protection cover is fixedly connected with the long guide pipe, the installation nut is tightly fastened to the long guide pipe in a sealing mode through an installation screw and a sealing rubber ring, the upper end of the long guide pipe is connected with a metal hose joint, and the metal hose joint is connected to the protection pipe through a metal hose fixing piece.

Preferably, the waterproof shrinkable tube is sleeved on the upper section of the protection tube and the mounting seat part above the mounting nut.

Preferably, the optical fiber protective cover is screwed to a screw portion at the upper end of an outer protective cover of the thermal simulation device and sealed with a sealing rubber ring.

Preferably, the temperature measuring host is arranged on the outer wall of the transformer host.

The invention has the beneficial effects that: compared with the prior art, the invention has the following effects:

(1) the invention adopts a detachable connection structure for each module, damages one of the modules, directly replaces an independent module, is convenient to maintain and low in maintenance cost, carries out the oil temperature monitoring of the measuring transformer through an oil temperature measuring blind pipe at the top layer of the transformer, uses a thermal simulation device to superpose temperature rise values according with the copper oil temperature difference of the transformer, indirectly reflects the average temperature of a transformer winding, avoids the problem that the temperature of a measured object cannot be reflected in time due to the heat dissipation of a temperature measuring point, adopts the mode of the thermal simulation device and an optical fiber temperature probe to carry out temperature measurement, directly transmits the temperature through optical fibers, has the temperature measuring speed of optical fiber temperature measurement which is several times faster than that of the traditional pressure type temperature controller, has fast response speed, is not influenced by external factors such as environmental temperature, atmospheric pressure and the like, is not interfered by a strong electric field and a strong electric field of the transformer, has relatively, the installation of transformers of various models is completely met, the installation is simple, the optical fiber probe does not need to be preset before the transformer leaves a factory, and the installation can be carried out at any time;

(2) according to the thermal simulation technology, a heating coil is adopted to heat a liquid temperature conduction medium, the liquid temperature conduction medium is transmitted to the optical fiber temperature measuring probe through an outer protective cover made of a metal material, and the liquid temperature conduction medium (heat conduction medium) is adopted, so that the temperature of the heating coil and the temperature of copper oil are more uniformly transmitted to the optical fiber temperature measuring probe, the measurement is more accurate, the data is more reliable and stable, the structure is simple, the heat transmission effect is good, the accurate measurement of the temperature measuring probe is convenient, the installation of a closed temperature measuring probe is avoided, the heat loss is avoided, the measurement accuracy is higher, the structure is simple, and the;

(3) the high-temperature sealant is adopted for sealing, so that heat dissipation and sealing of a liquid temperature conduction medium can be avoided, and the sealing effect is improved;

(4) pouring heat-conducting silicone grease, and then sealing by using temperature-resistant silica gel, and taking the sealing and fixing effects of the optical fiber probe into consideration;

(5) the mounting seat has a simple structure, is convenient to mount and stable and reliable in connection, the thermal simulation device is convenient to connect with the external protection tube by adopting the extension tube, and the optical fiber protection cover can effectively protect the optical fiber connection optical fiber temperature measurement probe;

(6) the upper part of the mounting seat and a part of the metal hose are tightened by adopting a waterproof shrinkage pipe to perform secondary protection so as to prevent the optical fiber from being damaged due to icing after water is fed;

(7) the connecting mode of the thread sealing rubber ring is adopted, so that the connection is stable and reliable, the connection is convenient, the modular structure is convenient to realize, and the sealing effect is good.

Drawings

FIG. 1 is a schematic view of the mounting structure of the present invention;

FIG. 2 is a schematic structural view of the present invention;

fig. 3 is a schematic diagram of a thermal simulation apparatus.

Detailed Description

The invention is further described with reference to the accompanying drawings and specific embodiments.