CN210603584U

CN210603584U - Transformer vibration induction device and protective cover structure thereof

Info

Publication number: CN210603584U
Application number: CN201922077987.8U
Authority: CN
Inventors: 任栎
Original assignee: Shaoxing Jiurong Electric Co Ltd
Current assignee: Shaoxing Jiurong Electric Co Ltd
Priority date: 2019-11-27
Filing date: 2019-11-27
Publication date: 2020-05-22
Anticipated expiration: 2029-11-27

Abstract

The utility model discloses a transformer vibration sensing device and a protective cover structure thereof, which comprises an elastic part and a cover body, wherein a positioning groove is arranged on one side surface of the cover body, the elastic part is arranged at the groove bottom of the positioning groove, a plurality of magnets and a sealing ring are fixed on one side surface of the cover body with the positioning groove, and the notch of the positioning groove is arranged in the inner hole range of the sealing ring; after the magnet is adsorbed on the side wall of the transformer, the side surface of the sealing ring is tightly attached and sealed with the side wall of the transformer; the vibration sensor is arranged in the positioning groove, the two ends of the elastic piece are respectively abutted against the bottom of the positioning groove and the tail end of the vibration sensor, and the induction head of the vibration sensor is positioned at the notch position of the positioning groove. The structure of the vibration sensor can be convenient to install, can protect the vibration sensor from being influenced by the external severe environment, and can still work normally and stably.

Description

Transformer vibration induction device and protective cover structure thereof

Technical Field

The utility model relates to a technical field that is used for induction monitoring oil-immersed transformer during operation to produce the vibration situation, especially a transformer vibration induction system and protection casing structure thereof.

Background

In an electric power system, an oil-immersed transformer is one of main devices of the electric power system, and the operation state of the oil-immersed transformer is directly related to the safety and stability of the electric power system. The deformation and looseness of the transformer winding become one of the main causes of the failure of the power transformer, and the deformation and looseness of the transformer winding have a cumulative effect, and although the insulation breakdown accident does not necessarily occur immediately, the transformer with such a failure hidden trouble is subjected to overcurrent or overvoltage again, and even insulation breakdown occurs under the ferromagnetic vibration effect of normal operation. Therefore, the real-time state monitoring of the transformer vibration is significant.

At present, a transformer vibration on-line monitoring sensor is directly adsorbed to the wall of an oil tank by a magnet, and a sensor output signal output connector is connected to a monitoring device through a coaxial cable. The sensor is exposed in a severe outdoor environment for a long time, and has the following hidden dangers: 1. stains are attached to the surface of the sensor, and the magnet adsorption surface is rusted; 2. the sensor output signal output joint is exposed to the sun for a long time, the sealing property is reduced due to accelerated aging of a sealing insulating material, and signal transmission is failed due to poor contact of the signal output joint. The above problems directly or indirectly affect the sensitivity and reliability of use of the vibration sensor. How to keep the self-advantages of the vibration sensor and play a safety protection role when the vibration sensor is used outdoors for a long time becomes the key point of the current research of related technicians.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the not enough and one kind that designs of above-mentioned technique can easy to assemble and can protect vibration sensor not influenced by external adverse circumstances, still can normally stabilize transformer vibration induction system and protection casing structure of work.

The utility model relates to a protective cover structure, which comprises an elastic part and a cover body, wherein a positioning groove is arranged on one side surface of the cover body, the elastic part is arranged at the groove bottom of the positioning groove, a plurality of magnets and a sealing ring are fixed on one side surface of the cover body with the positioning groove, and the notch of the positioning groove is arranged in the inner hole range of the sealing ring; after the magnet is adsorbed on the side wall of the transformer, the side surface of the sealing ring is tightly attached and sealed with the side wall of the transformer.

Preferably, the vibration isolation device further comprises a vibration isolation sleeve, the vibration isolation sleeve is placed in the positioning groove and covers the vibration sensor, and the outer side wall of the vibration isolation sleeve is attached to the inner side wall of the positioning groove; after the sensor is placed in the positioning groove, the sensor in the positioning groove is isolated from the housing, and the sensitivity of the sensor is improved.

Preferably, the vibration sensor further comprises a signal output connector, the cover body is provided with a threading hole communicated with the positioning groove, and an interface of the vibration sensor correspondingly penetrates through the threading hole and then is connected with the signal output connector.

Preferably, the cover body is provided with a casing in an extending mode, one side of the casing is spliced with one side of the cover body provided with the positioning groove to form a mounting plane, the lower portion of the positioning groove on the mounting plane is provided with a long hole communicated with the threading hole, the sealing ring and the magnet are fixed on the mounting plane, and the signal output connector is contained in an inner cavity of the casing.

Preferably, the magnet is a rectangular bar-shaped magnet, the mounting plane is provided with a rectangular groove and a ring groove, the rectangular bar-shaped magnet is embedded and fixed in the rectangular groove, the sealing ring is embedded and fixed in the ring groove, the sealing ring is higher than the mounting plane, and the adsorption surface of the magnet is flush with the mounting plane. It uses with the vibration isolation cover cooperation further to have solved among the prior art sensor and from adopting the fix with screw between taking magnet, long-time transformer operation vibration leads to the not hard up technical problem of screw.

Preferably, the bottom side surface of the shell is provided with a threaded hole corresponding to the threading hole, the threaded hole is in threaded connection with a waterproof sleeve, and a sealing ring is embedded between the top step surface of the waterproof sleeve and one side surface of the shell with the threaded hole. And the cable penetrates through the waterproof sleeve and then is directly inserted into the interface of the sensor for butt joint, so that the connecting part is completely accommodated in the inner cavity of the shell, and the reliability of the coaxial cable after connection is ensured.

Preferably, a groove is formed in the bottom of the positioning groove, and the elastic piece is inserted into the groove; wherein, the both ends of elastic component are contradicted with the sensor tail end in the constant head tank and the tank bottom of recess respectively to the recess realizes carrying out the effect of location to the elastic component.

Preferably, the elastic member is a spring.

Preferably, the outer side wall formed by mutually splicing the left side wall and the right side wall of the shell on the cover body and the left side wall and the right side wall of the shell is provided with a recess; which is easy to mount or demount for gripping.

The utility model provides a transformer vibration induction system, includes vibration sensor and as above the protection casing structure, vibration sensor arranges the constant head tank in, and the tank bottom of the both ends difference constant head tank of elastic component and vibration sensor's tail end conflict, vibration sensor's inductive head is located the notch position of constant head tank. When the protective cover structure is adsorbed to the oil tank wall of the oil-immersed transformer, the elastic part extrudes the sensor, so that the sensing head of the sensor is firmly attached to the oil tank wall, the sensor is ensured to be effectively contacted with the oil tank wall, and the protective cover structure is not influenced by any environment.

The utility model relates to a transformer vibration induction system and protective cover structure thereof, when the cover shell is adsorbed to the oil tank wall of the oil-immersed transformer, the sealing ring is extruded and then the sealing ring is tightly attached to the side wall of the oil tank, so that the cavity formed by combining the positioning groove of the cover body, the inner cavity of the shell and the inner hole of the waterproof sleeve is sealed, thereby effectively overcoming the problems of monitoring sensitivity, safe use and reliability and the like of a vibration sensor caused by severe outdoor environment; the vibration sensor can be further prevented from being influenced by the external environment during working, and the service life and the service performance of the vibration sensor are prolonged.

Drawings

FIG. 1 is a schematic view of the overall structure of the embodiment;

FIG. 2 is a sectional view of the embodiment;

fig. 3 is a side view of the embodiment.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art all belong to the protection scope of the present invention.

Example (b):

as shown in fig. 1-3, the protective cover structure described in this embodiment includes an elastic member 3 and a cover body 1, a positioning groove 14 is formed on one side surface of the cover body 1, the elastic member 3 is disposed at the bottom of the positioning groove 14, a plurality of magnets 9 and a sealing ring 2 are fixed on one side surface of the cover body 1 having the positioning groove 14, and a notch of the positioning groove 14 is disposed in an inner hole of the sealing ring 2; after the magnet 9 is adsorbed on the side wall of the transformer, the side surface of the sealing ring 2 is tightly attached and sealed with the side wall of the transformer; after sealing, the notch of the positioning groove 14 is isolated from the outside, so that a sealed environment is provided for the sensor arranged in the positioning groove, the sensor can work without being influenced by the external environment, and the elastic piece 3 can adopt a spring or other elastic objects as required.

In the embodiment, the vibration isolation device further comprises a vibration isolation sleeve 4, the vibration isolation sleeve 4 is placed in the positioning groove 14 and covers the vibration sensor 5, and the outer side wall of the vibration isolation sleeve 4 is attached to the inner side wall of the positioning groove 14; wherein the vibration isolation cover can adopt EVA vibration isolation material as required for the sensor in the constant head tank is better with housing barrier propterty, prevents that the vibration conduction that the sensor takes place from to the housing.

In the embodiment, the vibration sensor further comprises a signal output connector 15, a threading hole 16 communicated with the positioning groove 14 is formed in the cover body 1, and an interface of the vibration sensor 5 correspondingly penetrates through the threading hole 16 and then is connected with the signal output connector 15; wherein the signal output connector is mounted on the coaxial cable.

In order to protect the connection part of the signal output connector 15 and the interface of the vibration sensor 5, a casing 13 is extended from one side of the cover 1 with a threading hole 16, a mounting plane 100 is formed by splicing one side of the casing 13 and one side of the cover 1 with a positioning groove 14, an elongated hole 131 communicated with the threading hole 16 is arranged below the positioning groove 14 on the mounting plane 100, the sealing ring 2 and the magnet 9 are both fixed on the mounting plane 100, and the signal output connector 15 is accommodated in the inner cavity of the casing 13. Wherein the housing and the shell are combined with each other to form an integrated structure; the sensor can be installed in the positioning groove under the condition that the length of the connecting piece with the interface on the sensor is longer due to the design of the long hole, so that the sensor is suitable for the sensors with different lengths of the connecting pieces, and the length of the long hole can be additionally designed according to the length of the connecting piece.

In this embodiment, the magnet 9 is a rectangular bar-shaped magnet, and the mounting plane 100 is provided with a rectangular groove 11 and a ring groove 12, the rectangular bar-shaped magnet 9 is embedded and fixed in the rectangular groove 11, the sealing ring 2 is embedded and fixed in the ring groove 12, the sealing ring 2 is higher than the mounting plane 100, and the adsorption surface of the magnet 9 is flush with the mounting plane 100; wherein, it is more firm in order to adsorb to fix, can set for two or more with the quantity of magnet, the kind of magnet can select to be the strong magnet, and the fixed of magnet can adopt adhesive (casting glue) or fix with screw in the elongated slot, when screw 10 is fixed, set up counter bore 91 on the magnet, set up the screw that corresponds with the counter bore position at the tank bottom in elongated slot, the screw rod of screw runs through behind the counter bore and carries out threaded connection with the screw, and the head of screw sinks in the up end of counter bore, thereby cooperate with the vibration isolation cover and further solved among the prior art sensor and from taking the magnet between adopt the fix with screw, long-time transformer operation vibration leads to the not hard up technical problem of screw.

In this embodiment, a threaded hole 132 corresponding to the threading hole 16 is formed in the bottom side surface of the housing 13, a waterproof jacket 8 is connected to the threaded hole 132 in a threaded manner, and a sealing ring 7 is embedded between a step surface on the top of the waterproof jacket 8 and a side surface of the housing 13 having the threaded hole 132; wherein, after fixing the protection casing structure absorption on the fuel tank wall, the design that the waterproof cover is located the casing bottom side and has the sealing washer between the top step face of waterproof cover and the side that has the screw hole on the casing for the rainwater can't get into the casing inner chamber through waterproof cover and screw hole, thereby further avoids sensor and connection portion and rainwater contact, makes barrier propterty better.

In this embodiment, the groove 141 is disposed at the bottom of the positioning groove 14, and the elastic element 3 is inserted into the groove 141; wherein, the both ends of elastic component 3 respectively with the sensor 5 tail end in the constant head tank 14 and the tank bottom of recess 141 contradict to recess 141 realizes carrying out the effect of fixing a position elastic component 3.

In this embodiment, the outer side wall formed by mutually splicing the left and right side walls of the cover body 1 and the left and right side walls of the shell 13 is provided with a recess 16; which is convenient for installation or disassembly for grasping; since the cover 1 and the housing 13 form an integrated shield, the recesses 16 are formed on both left and right side walls of the shield.

Utilize a certain embodiment that the above-mentioned protection casing structure used as transformer vibration induction system, including vibration sensor 5 and as above-mentioned protection casing structure, vibration sensor 5 arranges the constant head tank 14 in, and the both ends of elastic component 3 conflict with the tail end of vibration sensor 5 respectively the tank bottom of constant head tank 14, and the inductive head of vibration sensor 5 is located the notch position of constant head tank 14.

Wherein, adsorb the protection casing structure firmly on oil tank wall of oil-immersed transformer through magnet 9 during on-the-spot installation, extrude sealing washer 2 simultaneously, sealing washer 2 hugs closely on the lateral wall of oil tank, guaranteed the sealing effect of protection casing structure to inside cavity, the elasticity extrusion vibration sensor 5 of installation in the cavity simultaneously, guarantee that vibration sensor's inductive head 5 firmly pastes on oil tank wall, it is stable and firm, guaranteed vibration sensor 5's reliability and improved sensitivity, wherein protection casing and waterproof cover are insulating material and make.

The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by the teaching of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as the present invention, fall within the protection scope of the present invention.

Claims

1. A protective cover structure is characterized by comprising an elastic part and a cover body, wherein a positioning groove is formed in one side surface of the cover body, the elastic part is arranged at the groove bottom of the positioning groove, a plurality of magnets and a sealing ring are fixed on one side surface, provided with the positioning groove, of the cover body, and a groove opening of the positioning groove is arranged in the range of an inner hole of the sealing ring; after the magnet is adsorbed on the side wall of the transformer, the side surface of the sealing ring is tightly attached and sealed with the side wall of the transformer.

2. The protective cover structure according to claim 1, further comprising a vibration isolation sleeve, wherein the vibration isolation sleeve is disposed in the positioning groove and covers the vibration sensor, and an outer side wall of the vibration isolation sleeve is attached to an inner side wall of the positioning groove.

3. The protective cover structure according to claim 1, further comprising a signal output connector, wherein the cover body is provided with a threading hole communicated with the positioning groove, and the interface of the vibration sensor is connected with the signal output connector after correspondingly penetrating through the threading hole.

4. The protective cover structure according to claim 3, wherein the casing extends from a side of the cover body having the threading hole, and a side surface of the casing and a side surface of the cover body having the positioning groove are spliced to form a mounting plane, the mounting plane has an elongated hole communicating with the threading hole below the positioning groove, the sealing ring and the magnet are fixed on the mounting plane, and the signal output connector is received in the inner cavity of the casing.

5. The shield structure according to claim 4, wherein the magnet is an elongated bar-shaped magnet, and the mounting plane is provided with an elongated slot and a ring slot, the elongated bar-shaped magnet is embedded and fixed in the elongated slot, the sealing ring is embedded and fixed in the ring slot, and the sealing ring is higher than the mounting plane, and the absorption surface of the magnet is flush with the mounting plane.

6. The protective cover structure according to claim 4, wherein the bottom side surface of the shell is provided with a threaded hole corresponding to the threading hole, a waterproof sleeve is connected to the threaded hole in a threaded manner, and a sealing ring is embedded between the top step surface of the waterproof sleeve and one side surface of the shell with the threaded hole.

7. The protective cover structure according to claim 1, wherein the bottom of the positioning groove is provided with a groove, and the elastic member is inserted into the groove.

8. Protective cover structure according to claim 1, wherein the resilient member is a spring.

9. The shield structure according to claim 1, wherein the shield body has recesses on both left and right sidewalls.

10. A vibration sensing apparatus for a transformer, comprising a vibration sensor and a protective cover structure as claimed in any one of claims 1 to 9, wherein the vibration sensor is disposed in the positioning groove, and both ends of the elastic member are respectively abutted against the bottom of the positioning groove and the tail end of the vibration sensor, and the sensing head of the vibration sensor is located at the position of the notch of the positioning groove.