Use one secondary to fuse solid utmost point post and get electric installation on outdoor post
Technical Field
The utility model belongs to the technical field of novel outdoor column switch and specifically relates to a secondary fuses integrated solid utmost point post that seals that outdoor vacuum circuit breaker used is fused to a secondary.
Background
Among the prior art of china, the vacuum circuit breaker on post mainly is "altogether box" and "pillar" formula, and the pillar type mainly is for solid utmost point post cooperation external mounting type sensor, because of the volume of sensor and the multiple reason restriction of pouring process, can't satisfy the operation requirement after going in the line if the part volume is too big leads to the product, if can't reach zero looks integrative current sensor integration, can't reach zero looks integrative voltage sensor integration, if the part is small can't satisfy the precision of sensor.
Because voltage, current sensor's is bulky in the existing market, it is big with the epoxy combines the technology degree of difficulty, bulky, it is many to walk the line because of the return circuit after the body, characteristics such as the product is withstand voltage, partial discharge, lightning impulse can't be shaped, adopt the mode of simple back equipment more, reduce the integration degree of difficulty, the local one secondary that realizes fuses, but because the technical characteristic of electric capacity itself, need dispose the problem that the precision that great bulky capacitance value of great volume solved the one secondary and fuses, lead to the unable integration of product.
In the production process of products in the prior art, due to the particularity of the epoxy resin pouring process, high temperature, pouring pressure, internal contraction stress, unbalanced contraction coefficient and other reasons exist during pouring, the products have the problems of poor combination of parts and the like during pouring, and the products cannot meet the requirements of mechanical impact for tens of thousands of times and the use environment of-40-70 ℃.
The existing transformer substation needs to carry out secondary part power supply on the breaker for operation of the secondary part to provide power when the switch cabinet is put into operation, but the power supply needs to be replaced, inspected and maintained in a short period due to time factors, so that the difficulty of high-voltage transformation is increased, and the technical problem in the field is solved.
The secondary power supply process of current switch leans on that to increase power supply unit outside the switch, or increases independent voltage transformer's mode and satisfy the power supply, will cause the switch to inspect or overhaul the new power of change in certain cycle, or then adopt huge voltage transformer of volume to satisfy the electricity getting characteristic, cause the characteristic parameter change, have great hidden danger, await urgent need the improvement.
Prior art patents such as CN 110473739 a disclose: a novel primary and secondary fusion vacuum circuit breaker pole comprises a vacuum arc extinguish chamber, an epoxy resin casting body, a flexible connection, an insulating pull rod assembly, a lower outgoing line, a current sensor, a capacitive voltage sensor and a capacitive energy taking device; wherein the interior of the epoxy resin casting body is a hollow cavity; the vacuum arc-extinguishing chamber is arranged at the top of the integral structure of the epoxy resin casting body; the lower outgoing line is arranged in a side cylinder structure of the epoxy resin pouring body, an annular current sensor is arranged outside the lower outgoing line, and the current sensor comprises a phase current sensor and a zero sequence current sensor; the capacitive voltage sensor and the capacitive energy-taking device are respectively arranged on the left side of the lower end of the hollow cavity in the epoxy resin pouring body, and the bottom of the vacuum arc-extinguishing chamber is connected with a lower outgoing line through flexible connection; the insulating pull rod assembly is arranged at the bottom of the vacuum arc extinguish chamber, and the top end of the insulating pull rod assembly penetrates through the flexible connection and extends into the vacuum arc extinguish chamber; the capacitive voltage sensor and the capacitive energy-taking device are both designed in a rear-mounted mode and are fixed inside the pole through screws arranged at the end portions. This design is single transformation ratio, can not satisfy the demand of various different transformation ratios, simultaneously because the influence such as the temperature of casting technology, pressure, environment, impact force in the in-process of product recasting, current sensor is after the pouring, often can appear the precision not enough, the high pressure is bad scheduling problem.
Disclosure of Invention
The utility model aims at providing an use a secondary to fuse on outdoor post and seal utmost point post admittedly, it is big to aim at solving to have the integrated degree of difficulty among the prior art, and is bulky, and the precision is low, high pressure, partial discharge, thunder and lightning strike scheduling problem in the forming process.
In order to solve the above problem, the technical scheme of the utility model is that: mainly comprises an upper guide rod, a vacuum arc extinguish chamber, a movable terminal, a double-end screw, spring contact grease, a lower guide rod,The system comprises a zero sequence voltage sensor, a phase sequence voltage sensor, a high-voltage conductor, a zero-phase integrated voltage sensor, a zero-phase integrated current sensor, a low-voltage end phase sequence low-voltage capacitor, a zero sequence common low-voltage capacitor, a phase sequence voltage sensor and a low-voltage capacitor. The upper guide rod is connected with the static end of the vacuum arc extinguish chamber, the vacuum arc extinguish chamber is connected with the movable terminal, the movable terminal is tightly combined through the fastening force of the double-head screw, and the spring contact grease is connected with the movable terminal and the lower guide rod to form a primary main loop structure; the upper guide rod is connected with a zero-phase integrated voltage sensor, a wiring penetrates through the zero-phase integrated current sensor and is connected with a low-voltage end sequence low-voltage capacitor and a zero-sequence common low-voltage capacitor to form a high-voltage end zero-phase loop; the lower guide rod is connected with a load side phase sequence voltage sensor and correspondingly matched with a load side phase sequence low-voltage capacitor to form a load side phase sequence voltage sensor loop; after the lower guide rod is electrified, the zero-phase integrated current sensor induces current to serve as a zero-phase integrated current sensor loop; the primary main loop、High-voltage end zero-phase loop、Load side phase sequence voltage sensor loop、The zero-phase integrated current sensor loop is integrally poured into the epoxy body to form a secondary fusion solid-sealed polar pole.
The zero-phase integrated current sensor is a phase-sequence current sensor with multiple transformation ratios and simultaneously has a zero-sequence current sensor, so that the product has more compatibility and can meet the following requirements: 200:1, 400: 1; 600:1 and the like.
The zero-phase integrated current sensor adopts a pre-pouring forming mode after soft packing, and then secondary pouring is carried out, so that the product yield, the mechanical life and the electrical life of the product are greatly improved.
The phase sequence of the zero-phase integrated voltage sensor is less than or equal to 150PF, the precision is 0.5 grade, the zero sequence is less than or equal to 250PF, and the precision is 1P grade; phase sequence partial pressure ratio (10 kV-
)/(3.25V/
),Zero sequence partial pressure ratio (10 kV-
)/(6.5V/
) The integral structure meets the pouring requirement and simultaneously meets the indexes of power frequency, partial discharge and lightning impulse to be used as a secondary loop unit;
and after the zero-phase integrated voltage sensor lead penetrates through the zero-phase integrated current sensor body, the epoxy resin solid-sealed polar pole body is led out together with the zero-phase integrated current sensor lead.
The load side phase sequence voltage sensor is used for testing the load side voltage, the phase sequence adopts the phase sequence of less than or equal to 150PF, the precision is 0.5 grade, and the zero phase partial pressure ratio (10 kV ^ greater or greater than or equal to
)/(3.25V/
) The utility model discloses make utmost point post electric field absolutely symmetrical, have better electrical property good mechanical properties, as secondary circuit unit.
The incoming line and the outgoing line end are provided with the phase sequence voltage sensors, the requirement of outgoing line selection in the market can be met in the product operation process, the product can enter a voltage test state, the design concept of intelligent one-time and two-time fusion is met, and the secondary circuit unit is used.
The vacuum arc extinguish chamber is connected to the pole-mounted switch through the conducting block, the double-headed screw and the insulating pull rod, and is controlled by the breaker to be switched on and switched off, and the vacuum arc extinguish chamber serving as a primary main loop meets the use requirement of the switch.
The zero-phase integrated voltage sensor, the zero-phase integrated current sensor and the load side phase sequence voltage sensor are cast into a whole by the vacuum arc extinguish chamber of the same secondary circuit, so that the primary and secondary fusion is realized.
The zero sequence voltage sensor and the phase sequence voltage sensor are integrated through epoxy resin pouring, pass through the outside after being soft packaged, and then are subjected to solid sealing and forming.
The high-voltage conductors are connected through copper connecting nuts.
The high-voltage conductor leads voltage and current to the high-voltage ends of the zero-sequence voltage sensor and the phase-sequence voltage sensor, and the zero-sequence voltage sensor is connected to a lead end voltage signal lead of the current sensor through a lead low-voltage lead. The invention solves the problems that the voltage sensor needs large insulation distance due to insulation problem and the outer diameter of the sensor is increased for keeping enough capacitance value due to large insulation distance, realizes product miniaturization and greatly improves the qualified rate of product molding, increases the yield by more than 95% from the original yield of about 40% and greatly reduces the processing cost.
The lead of the zero-phase integrated voltage sensor leads out a low-voltage signal lead from the epoxy resin solid-sealed pole body through the current sensor, and a voltage signal wire penetrates through the zero-phase integrated current sensor and then is converged into the zero-sequence lead and the zero-sequence outgoing line lead to be simultaneously led out. The design breaks the mode that the leads of the product are separated, so that the power plant of the product is optimized, the size is smaller, the leads are more reasonable, the product forming process is simpler, the leads are shielded mutually from one another, and the leads are free of interference mutually.
Further, the utility model also discloses an use the electricity device of getting of a secondary fusion solid seal utmost point post on the outdoor post, constitute by guide bar, locking closure, pressure spring, voltage sensor, collection box, insulating pull rod, high-pressure end, coupling nut, voltage sensor be connected with the metal connector, coupling nut connect the circuit breaker.
The upper end of the voltage sensor is inserted with a connecting wire, and the connecting wire is connected with the collecting box.
The voltage sensor transmits the power taking power to the power taking low-voltage capacitor through the high-voltage end.
The voltage sensor is arranged between the lower end of the connector and the connecting nut, the voltage sensor is not connected with the nut, and the voltage sensor is led out of the collecting box.
The high voltage of the voltage sensor is transmitted downwards from the upper surface of the pressure spring.
The voltage signal information of the high-voltage end is transferred to the acquisition box to collect the conversion power-taking data received by the voltage sensor, the important parameters of the on-line conversion circuit breaker pressure and the mechanism operation are converted, meanwhile, the function of power-taking power supply is provided for the normal operation of the switch cabinet, and the on-line power supply and the normal operation of the circuit breaker are realized through the insulating pull rod.
The utility model discloses a zero looks integrative electric current, voltage sensor are multi-functional, and are small, and the technique of low capacity is solved the degree of difficulty of integrating on the market height, and the effectual volume of having guaranteed, the precision is high, and the product is fused to the first secondary that the function is complete, adopts a plurality of return circuits to carry out simultaneously with surveying the mode of walking the line side by side, reduces influences such as high pressure, partial discharge, thunder and lightning impulse among the forming process.
The utility model provides an outdoor column switch one secondary fusion technique, realized the function of voltage, electric current zero-phase test and protection, surpassed the problem of domestic and foreign precision completely, realized the self of product simultaneously and got the electric problem, realized that the integration of secondary part is poured into a whole, satisfied the index in domestic and foreign market.
The utility model has the advantages of solving the technical difficulty brought by the multi-part lead wire to the pouring, bringing advantages to the integral electric field and mechanical performance of the product, and simultaneously providing the technical core of the volume miniaturization of the product as a secondary loop unit;
the utility model discloses can carry out high-voltage signal at any time and convert the important parameter of the required power of other parts into, do not increase the space that does not change former switch moreover, solve present cubical switchboard and produce the risk of transformer substation's operational failure. Fills the current gap of getting electricity in the switch field at home and abroad.
Drawings
The present invention can be further illustrated by the non-limiting examples given in the accompanying drawings;
fig. 1 is a cross-sectional view of a secondary fusion embedded pole used on an outdoor post of the present invention;
FIG. 2 is a schematic view of the zero-phase integrated voltage sensor of the present invention;
FIG. 3 is a schematic structural view of the zero-phase integrated multiple transformation ratio current sensor of the present invention;
fig. 4 is the utility model relates to an use a secondary to fuse and seal utmost point post admittedly on outdoor post and get electric installation schematic diagram.
Detailed Description
In order to make the present invention better understood by those skilled in the art, the technical solutions of the present invention are further described below with reference to the accompanying drawings and examples.
As shown in fig. 1, 2 and 3, the utility model provides a use one secondary to fuse solid seal utmost point post on outdoor post, by last guide arm 1, vacuum interrupter 2, move terminal 3, double-end screw 5, spring touch fat 4, lower guide arm 6, zero looks integrative voltage sensor 7, zero looks integrative current sensor 8, low pressure end phase sequence low-voltage capacitor 9, the public low-voltage capacitor 10 of zero sequence, load side phase sequence voltage sensor 11, load side phase sequence voltage capacitor 12, epoxy seals utmost point post body 18 admittedly, insulating pull rod 13, gets electric low- voltage capacitor 15, 5 nut inserts 14, voltage sensor 11, phase sequence transformation ratio 9.1; phase sequence transformation ratio 9.2; phase sequence transformation ratio 9.3; a common line 9.4; a zero sequence lead 10.1; a zero-sequence outgoing line 10.2; a voltage signal line 10.3; voltage signal line 10.4, etc.
Specifically, an upper guide rod 1 is connected with a static end of a vacuum arc extinguish chamber 2, the vacuum arc extinguish chamber 2 is connected with a movable terminal 3, the movable terminal 3 is tightly combined through fastening force of a double-end screw 5, and a spring contact grease 4 is connected with the movable terminal 3 and a lower guide rod 6 to form a primary main loop structure; the upper guide rod 1 is connected with a zero-phase integrated voltage sensor 7, the wiring of the zero-phase integrated current sensor 8 passes through, and is connected with a low-voltage end phase sequence low-voltage capacitor 9 and a zero-sequence public low-voltage capacitor 10 to form a high-voltage end zero-phase loop; the lower guide rod 6 is connected with a load side phase sequence voltage sensor 11 and correspondingly matched with a load side phase sequence low-voltage capacitor 12 to form a load side phase sequence voltage sensor loop; after the lower guide rod 6 is electrified, the zero-phase integrated current sensor 8 induces current to serve as a zero-phase integrated current sensor loop; the above-mentioned loop is poured into the solid-sealed polar pole body 18 of epoxy resin integrally, form the solid-sealed polar pole of reliable one-shot and two-shot fusion;
the zero-phase integrated
voltage sensor 7 adopts a phase sequence of less than or equal to 150PF and a precision of 0.5 grade, and adopts a zero sequence of less than or equal to 250PF and a precision of 1P grade; phase sequence partial pressure ratio (10 kV-
)/(3.25V/
) Zero sequence partial pressure ratio (10 kV-
)/(6.5V/
) The integral structure meets the pouring requirement and simultaneously meets the indexes of power frequency, partial discharge and lightning impulse to be used as a secondary loop unit;
and after the lead of the zero-phase integrated voltage sensor 7 passes through the body of the zero-phase integrated current sensor 8, the lead of the zero-phase integrated voltage sensor and the lead of the zero-phase integrated current sensor are led out of the solid-sealed pole body together.
The load side is connected with a phase
sequence voltage sensor 11 for testing the voltage of the load side, the phase sequence adopts less than or equal to 150PF, the precision is 0.5 grade, and the zero phase sequence partial pressure ratio (10 kV ^ er)
)/(3.25V/
) The utility model has symmetrical electric field of the pole, better electrical property and mechanical property, and can be used as a secondary loop unit;
the phase sequence voltage sensor is provided with a wire inlet end 17 and a wire outlet end 16, so that the requirement of wire outlet selection in the market can be met in the product running process, the product can enter a voltage test state, the design concept of intelligent one-time and two-time fusion is met, and the product is used as a secondary circuit unit;
the zero-phase integrated current sensor 8 adopts a phase-sequence current sensor with multiple transformation ratios and is also provided with a zero-sequence current sensor, so that the product has more compatibility.
The vacuum arc extinguish chamber 2 is connected to the pole-mounted switch through the conducting block 3, the double-head screw rod 4 and the insulating pull rod 13 and is controlled by the breaker to be switched on and off, and the vacuum arc extinguish chamber serves as a primary main loop to meet the use requirement of the switch.
The zero-phase integrated voltage sensor 7, the zero-phase integrated current sensor 8 and the load side phase sequence voltage 11 sense the vacuum arc extinguish chamber 2 of the same secondary circuit and are cast into a whole, so that the primary circuit and the secondary circuit are fused.
As shown in fig. 2, the zero-phase integrated voltage sensor 7 is poured and then is subjected to soft-packing process copper connecting nut 7.5 for connecting an incoming line high-voltage conductor, voltage and current are led to a high-voltage end of a zero sequence and a phase sequence, the zero sequence voltage sensor 7.6 is led to a high-voltage end of the zero sequence and the phase sequence through a low-voltage lead 7.7 of a lead wire, a lead end voltage signal lead 10.3 and a voltage signal lead 10.4 which are connected to the current sensor are connected, the phase sequence voltage sensor 7.3 is led out from the low-voltage lead 7.4 to be connected with the low-voltage lead 10.4, the zero sequence and the phase sequence are integrated through epoxy resin 7.2 pouring, soft packing 7.1 is externally passed, and then is subjected to solid sealing and forming, the utility model solves the problems that the insulation problem of the voltage sensor needs large insulation distance, and the problem that the sensor does not keep enough capacitance value to increase the outer diameter because of the insulation distance is large, realizes the miniaturization of products, greatly reducing the processing cost.
As shown in fig. 3, the utility model discloses a shaping mode of many transformation ratios can satisfy 200 simultaneously: 1,400: 1; 600:1, the product has higher compatibility due to the multi-functional transformation ratio mode; simultaneously because the influence such as the temperature of casting technology, pressure, environment, impact force among the in-process of product recasting, current sensor is after the pouring, often can appear the precision not enough, the high pressure is bad scheduling problem, consequently current sensor 8.1 adopts the fashioned mode of the post-cast 8.3 of soft package 8.2, then carries out secondary casting, provides product yield and product mechanical life and electric life greatly.
The utility model discloses a zero looks integrative voltage sensor 7's lead wire passes through zero looks integrative current sensor 8 body, draw the product body with the low-voltage signal lead wire, by voltage signal line 10.3, voltage signal line 10.4 passes zero looks integrative current sensor 8, the zero sequence lead wire of coming into 10.1, the zero sequence is qualified for the next round of competitions 10.2 lead wires and is drawn simultaneously, the detached mode of product lead wire is broken in this design, make the power plant of product optimize more, the volume is more small-size, the lead wire is more reasonable, product forming process is more succinct, the lead wire adopts the mutual shielding between line and the line, make and be noiseless each other, this utility model discloses a bright spot of this design also time.
As shown in fig. 4, furtherly, the utility model also discloses an use the electricity device of getting of a secondary fusion solid seal utmost point post on the outdoor post, by guide bar 16, locking closure 17, pressure spring 18, voltage sensor 20, gather box 24, high-pressure end 23, coupling nut 22 and constitute, voltage sensor 20 be connected with the metal connector, coupling nut 22 connect the circuit breaker.
The upper end of the voltage sensor 20 is inserted with a connecting wire, and the connecting wire is connected with a collecting box 24.
The voltage sensor transmits the power taking power to the power taking low-voltage capacitor through the high-voltage end.
The voltage sensor is arranged between the lower end of the connector and the connecting nut, the voltage sensor is not connected with the nut, and the voltage sensor is led out of the collecting box.
The high voltage of the voltage sensor is transmitted downwards from the upper surface of the pressure spring.
The voltage signal information of the high-voltage end 23 is transferred to the acquisition box 24 to collect the conversion power-taking data received by the voltage sensor 20, the function of taking a power supply is provided for the normal operation of the switch cabinet while the important parameters of the operation of the circuit breaker pressure and the mechanism are converted on line, and the on-line power supply and the normal operation of the circuit breaker are realized through the insulating pull rod intelligence.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
It is right above the utility model provides a pair of use a secondary to fuse on outdoor post and seal utmost point post admittedly and get electric installation and introduced in detail. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by those skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.