CN111326358A - Plum-blossom contact finger installation method - Google Patents
Plum-blossom contact finger installation method Download PDFInfo
- Publication number
- CN111326358A CN111326358A CN201811536170.6A CN201811536170A CN111326358A CN 111326358 A CN111326358 A CN 111326358A CN 201811536170 A CN201811536170 A CN 201811536170A CN 111326358 A CN111326358 A CN 111326358A
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- spring
- contact finger
- groove
- mounting
- contact
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
- H01H11/04—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
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Abstract
The invention relates to a plum-blossom-shaped contact finger installation method. Firstly, inserting one end of each contact finger into a ring groove of the mounting seat, secondly, sleeving a spring from a conical section of one end of the mounting seat, which is back to the ring groove, pushing the spring to move along the conical surface from one end of the mounting seat, which is back to the ring groove, along the axial direction of the ring groove, and enabling the spring to slip from one end of the mounting seat, which is provided with the ring groove, and enter the rear two spring mounting grooves of the contact finger; thirdly, inserting one end of the contact finger, which is back to the mounting seat, on the static contact seat, and retreating the mounting seat to expose the spring mounting groove at the first end part; and fourthly, repeating the second step to sleeve the spring in the first spring mounting groove. The invention solves the problems of difficult operation and low installation efficiency caused by a large number of contact fingers when the contact fingers are installed in the existing plum blossom contact switch equipment through the steps.
Description
Technical Field
The invention relates to a plum-blossom-shaped contact finger installation method.
Background
The electric connection in the high-voltage switch equipment is generally realized by adopting a connection mode of a plum blossom contact, and the plum blossom contact comprises a movable contact part and a contact clasping part. The contact enclasping portion comprises a static side contact finger group and a spring group. The movable contact part can be pulled out and inserted into the hole of the static side contact finger group according to requirements, so that the opening and closing operation is realized. In a switching-on state, the static side contact finger group and the movable contact part must be tightly held and have certain holding force, so that reliable through-current capacity between the movable contact part and the static side contact finger group is ensured, otherwise, the switch equipment generates heat seriously due to overlarge contact resistance between the static side contact finger and the movable contact, the through-current performance of the high-voltage switch is influenced, and even serious consequences are caused.
The utility model discloses a chinese utility model patent that the grant bulletin number is CN201975274U, and the grant bulletin date is 2011.09.14 has announced a special spring of plum blossom contact, and special spring of plum blossom contact includes a main spring and a connecting spring, the external diameter of main spring is compared connecting spring's external diameter is big, half a screw in of connecting spring in the internal thread of main spring one end, the main spring other end is in against the rotatory several circles back cover of coiling direction of spring on connecting spring's second half, the main spring both ends connect into a spring ring through connecting spring. The special spring for the plum blossom contact is arranged in an annular groove on the outer side of the static side contact finger group, and in order to ensure that the static side contact finger group has reliable holding force, the inner diameter of the special spring for the plum blossom contact when in a balanced state is smaller than the outer diameter of the static side contact finger group. Through the special spring for the plum blossom-shaped contact, all the contact pieces of the static side contact finger group have reliable holding force and the holding force is uniform, good contact of the plum blossom-shaped contact in a closing state is effectively guaranteed, and safety and reliability of high-voltage switch equipment are improved.
Generally, when the spring ring is installed on the static side contact finger group, in order to be convenient for spreading the spring, a supporting rod comprising a conical surface is needed, the diameter of the large-diameter end of the conical surface is larger than the diameter of the outer periphery of the static side contact finger group, and the diameter of the small-diameter end of the conical surface is smaller than the inner diameter of the spring ring in a free state. During installation, specifically, the contact fingers are kept on the same circumference, the large-diameter end of the supporting rod faces to a circle surrounded by the static contact finger group, the spring ring is sleeved into the installation tool from the small-diameter end, and the spring is pushed to move towards the static contact finger group until the spring ring slides off the installation tool and enters the annular groove on the outer side of the static contact finger group.
In the process, an assembler often needs to hold the relative position of each contact finger by hands, and another assembler installs a spring, so that the labor cost is high.
Disclosure of Invention
The invention aims to provide a plum blossom contact finger installation method to solve the problems of difficult operation and low installation efficiency caused by a large number of contact fingers when the contact fingers are installed in the existing plum blossom contact switch equipment.
In order to achieve the purpose, the technical scheme of the plum-blossom-shaped contact finger installation method is as follows: a plum blossom contact finger installation method at least comprises the following steps: firstly, inserting one end of each contact finger into a ring groove of the mounting seat, and enabling the groove wall of the ring groove to cover a spring mounting groove at the first end part of the contact finger; secondly, sleeving a spring from a conical section at one end of the mounting seat, which is back to the annular groove, pushing the spring to move along the conical surface from one end of the mounting seat, which is back to the annular groove, along the axial direction of the annular groove, and enabling the spring to slip from one end of the mounting seat, which is provided with the annular groove, and enter a middle spring mounting groove of the contact finger; thirdly, repeatedly installing a second spring for the second time, and sliding the second spring into a second end spring installation groove at one end of the contact finger, which is back to the installation seat; fourthly, inserting one end of the contact finger, which is back to the mounting seat, on the static contact seat, and retreating the mounting seat to expose the spring mounting groove at the first end part; and fifthly, sleeving a spring from the conical section at one end of the mounting seat, which is back to the annular groove, pushing the spring to move along the conical surface along the axial direction of the annular groove from one end of the mounting seat, which is back to the annular groove, and enabling the spring to slip from one end of the mounting seat, which is provided with the annular groove, and enter the first end part spring mounting groove.
The plum-blossom-shaped contact finger installation method has the beneficial effects that: one end of each contact finger is inserted into the ring groove of the mounting seat, in the process of mounting the spring ring, the inner groove wall and the outer groove wall of the ring groove respectively play a role in stopping the contact finger group, so that each contact finger is ensured to be positioned on a complete circle, the operation difficulty of mounting the spring ring is reduced, one assembler can also complete the mounting of the plum blossom contact finger, and the mounting efficiency is improved.
Further, the mounting seat is inverted before the first step, the socket of the annular groove faces upwards, and after the first step is completed, the mounting seat and the contact fingers mounted in the mounting seat are vertically turned over, so that the contact fingers are located below the mounting seat, and one ends of the contact fingers, which are located outside the annular groove, are abutted against the plane. The annular groove has the beneficial effects that the positions of the contact fingers are ensured through the friction force between one end of the contact finger outside the annular groove and the platform.
Furthermore, when the mounting seat is retreated in the fourth step, the contact finger does not completely separate from the annular groove. The spring mounting structure has the beneficial effect of ensuring that the spring can be sleeved on the contact finger after sliding off the mounting seat.
Drawings
Fig. 1 is a schematic structural diagram of a tulip contact in a use state in the prior art;
FIG. 2 is a schematic diagram of a static finger set in the prior art;
FIG. 3 is a schematic view of the assembly of a prior art spring ring;
FIG. 4 is a schematic structural diagram of a tooling used in an embodiment of a quincunx contact finger installation method;
FIG. 5 is a schematic structural diagram of a first step of an embodiment of a quincunx contact finger installation method;
FIG. 6 is a schematic structural diagram of a second step of the embodiment of the quincunx contact finger installation method;
FIG. 7 is a schematic structural diagram of a third step of the embodiment of the quincunx contact finger installation method;
fig. 8 is a schematic structural diagram of a fifth step of the embodiment of the quincunx contact finger installation method.
In the figure: 1. the moving contact, 2, quiet side touch indicate group, 3, spring ring, 4, support frame, 5, shield cover, 6, lower polytetrafluoroethylene packing ring, 7, go up polytetrafluoroethylene packing ring, 8, spring ring holding tank, 9, the ring form boss, 10, circular arc boss, 31, main spring, 32, coupling spring, 11, toper section, 12, cylinder section, 13, annular, 14, axial through hole.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1 and 2, a prior art tulip contact includes a movable contact 1, a stationary finger group 2, a spring ring 3, a support frame 4, a shield 5, a lower teflon gasket 6, and an upper teflon gasket 7. Static side touches and is provided with three spring ring holding tank 8 that is used for holding spring ring 3 on pointing the periphery of group 2, and support frame 4 is fixed with polytetrafluoroethylene packing ring 6 down including being used for holding touching the finger and indicating the mounting groove on support frame 4, is fixed with polytetrafluoroethylene packing ring 7 on shield cover 5, and shield cover 5 covers the top of establishing at support frame 4. The upper polytetrafluoroethylene gasket 7 is provided with a step surface for matching with the static side contact finger stop. The upper end of the static side contact finger group 2 is kept at the position through the step surface of the upper polytetrafluoroethylene gasket 7 and the spring ring 3, and the lower end of the static side contact finger group 2 is kept at the position through the contact finger mounting groove and the spring ring 3. The polytetrafluoroethylene is a material with high ablation resistance and self-lubricating property, when the moving contact reciprocates in the static side contact finger group 2, electric arcs can be generated, and the lower polytetrafluoroethylene gasket 6 and the upper polytetrafluoroethylene gasket 7 can prevent the electric arcs from ablating the static side contact finger group 2 and the shielding cover 5. The plum-blossom-shaped contact realizes switching-on and switching-off of the plum-blossom-shaped contact through the movement of the movable contact 1, a circular-ring-shaped boss 9 and a circular-arc-shaped boss 10 are processed in a cavity inside the static side contact finger group 2, the circular-arc-shaped boss 10 is used for being in stop fit with the contact finger mounting groove, and the static side contact finger group 2 realizes reliable holding of the movable contact 1 through the circular-ring-shaped boss 9.
As shown in fig. 3, the spring rings 3 have three sets, each set of spring ring 3 includes a main spring 31 and a connecting spring 32, as shown in fig. 3, the outer diameter of the main spring 31 is larger than the outer diameter of the connecting spring 32, one half of the connecting spring 32 is screwed into the internal thread at one end of the main spring 31, the other end of the main spring 31 rotates several turns in the opposite direction of the spring winding direction and then is sleeved on the other half of the connecting spring 32, and the two ends of the main spring 31 are connected into one spring ring 3 through the connecting spring 32.
As shown in fig. 1, three spring rings 3 are respectively installed in three circular ring-shaped spring installation grooves 8 on the outer side of a stationary side contact finger group 2, the spring rings 3 tightly hold the stationary side contact finger group 2, so that an inner side circular ring-shaped boss 9 of the stationary side contact finger group 2 surrounds an elastic cavity with variable size, when a switch device performs a switching-on operation, a movable contact 1 is inserted into the variable elastic cavity, the stationary side contact finger group 2 tightly holds the movable contact 1 under the action of the spring rings 3, and the reliable through-flow of current in a tulip contact is realized.
As shown in fig. 4, the tooling used in the method for mounting the quincunx contact finger comprises a columnar base body, a ring groove 13 and an axial through hole 14, wherein the columnar base body comprises a conical section 11 and a cylindrical section 12 close to the large-diameter end of the conical section, and the conical section 11 and the cylindrical section 12 are integrally arranged. The groove wall of the ring groove 13 is continuous in the circumferential direction, and the ring groove 13 is located on the end face of the cylindrical section 12 and used for clamping one end of the static side contact finger group 2. An axial through hole 14 extends through the cylindrical base. The groove wall of the ring groove 13 can cover the spring ring receiving groove 8 at the end of the stationary side finger set 2.
In order to facilitate the machining of the ring groove 13, the groove wall of the ring groove 13 is continuous in the circumferential direction, but other methods may be used, for example, the groove wall of the ring groove 13 is provided at intervals in the circumferential direction.
Under the condition that the annular groove 13 with enough depth can be processed without penetrating through the columnar matrix, the axial length of the plum blossom-shaped contact finger installation tool or the diameter of the large-diameter end is reduced. The major diameter end of the tapered section 11 is provided with the cylindrical section 12, but other modes can be adopted, for example, the cylindrical section 12 is not provided, the ring groove 13 is provided on the end face of the major diameter end of the tapered section 11, but in order to ensure the depth of the ring groove 13, the diameter of the major diameter end needs to be increased or the inclination angle of the tapered section 11 needs to be reduced, the diameter of the increased major diameter end is too large because the diameter of the major diameter end is larger than the peripheral diameter of the stationary side contact finger group 2, the spring ring 3 is difficult to move on the tapered section 11, the elastic force is too large when the spring ring 3 is separated from the tapered section 11, and the position of the stationary side contact finger group 2 can be damaged when the spring ring 3 contacts the stationary side contact finger group 2. Reducing the inclination angle of the conical section 11 results in lengthening the conical section 11, and lengthening the time for the spring ring 3 to pass through the conical section 11, which reduces the installation efficiency of the tulip contact finger.
In order to ensure the stability of the connection between the conical section 11 and the cylindrical section 12, the conical section 11 and the cylindrical section 12 are integrally arranged, but other methods may be adopted, for example, the conical section 11 and the cylindrical section 12 are fixedly connected by welding, etc.
As shown in fig. 5, a specific embodiment of the method for installing a tulip contact finger of the present invention at least includes the following steps: firstly, the tool used in the plum blossom-shaped contact finger installation method is inverted, the insertion opening of the ring groove 13 is upward, one end of each contact finger is inserted into the ring groove 13 of the tool used in the plum blossom-shaped contact finger installation method, and the groove wall of the ring groove 13 covers the spring installation groove at the first end part of the contact finger. As shown in fig. 6, in the second step, the tooling used in the method for installing the quincunx contact fingers and the contact fingers installed inside are vertically turned over, so that the contact fingers are positioned below the tooling used in the method for installing the quincunx contact fingers, and one ends of the contact fingers, which are positioned outside the ring grooves, are pressed on a plane. Sleeving the spring ring 3 from the conical section 11 at one end of the tool used in the plum-blossom-shaped contact finger installation method, which is back to the annular groove 13, pushing the spring ring 3 to move along the conical surface from one end of the tool used in the plum-blossom-shaped contact finger installation method, which is back to the annular groove 13, along the axial direction of the annular groove 13, and enabling the spring ring 3 to slip from one end of the tool used in the plum-blossom-shaped contact finger installation method, which is provided with the annular groove 13 and enter the middle spring installation groove of the contact finger; thirdly, repeatedly installing a second spring ring 3 for the second time, and sliding the second spring ring 3 into a second end spring installation groove at one end of the tooling used by the contact finger installation method facing away from the plum blossom contact finger; fourthly, inserting one end of a tool used by the contact finger back to the plum blossom contact finger installation method on the support frame 4, and retreating the tool used by the plum blossom contact finger installation method to expose a first end spring installation groove; but the fingers do not completely disengage from the ring groove 13. Fifthly, sleeving a spring from the conical section 11 at one end of the tool used in the plum-blossom-shaped contact finger installation method, which is back to the annular groove 13, pushing the spring ring 3 to move along the conical surface from one end of the tool used in the plum-blossom-shaped contact finger installation method, which is back to the annular groove 13, along the axial direction of the annular groove 13, and enabling the spring ring 3 to slip from one end of the tool used in the plum-blossom-shaped contact finger installation method, which is provided with the annular groove 13, and enter the first end part spring installation groove.
In order to facilitate one end of the contact finger to be inserted into the annular groove 13, in the first step, a tool used in the plum blossom contact finger installation method is inverted, and a socket of the annular groove 13 faces upwards. Of course, in other embodiments, the tooling used in the tulip contact finger installation method may not be inverted. However, by adopting the mode, the sight of an operator is shielded by the tool used in the plum blossom-shaped contact finger installation method, and it is difficult to insert one end of the contact finger into the ring groove.
In the second step, the tool used by the plum-blossom-shaped contact finger installation method and the contact finger installed in the ring groove 13 are vertically turned over, so that the contact finger is positioned below the tool used by the plum-blossom-shaped contact finger installation method, and one end of the contact finger positioned outside the ring groove 13 is pressed on a plane. The installation method has the advantages that the position of the static side contact finger group 2 is ensured through the friction force between the end, outside the annular groove 13, of the contact finger and the platform, of course, in other embodiments, the tool used in the plum blossom contact finger installation method and the contact finger installed in the annular groove 13 are not required to be vertically turned over, but in such a way, the end, outside the annular groove 13, of the contact finger cannot be kept in position, and the installation of the plum blossom contact finger is influenced.
In order to ensure that the spring ring 3 can be sleeved on the contact finger after slipping off from the tool used in the plum blossom contact finger installation method, when the tool used in the plum blossom contact finger installation method is retreated in the fourth step, the contact finger does not completely slip off the ring groove 13. Of course, in other embodiments, the contact finger in the fourth step may be completely removed from the ring groove 13, but this way cannot ensure that the spring ring 3 can be sleeved on the contact finger after being removed from the tool used in the quincunx contact finger installation method.
By the aid of the plum-blossom-shaped contact finger installation method, the positions of the contact fingers can be guaranteed in the installation process, so that the spring ring 3 can be easily installed on the outer side of the contact fingers, the operation difficulty of installing the spring ring 3 is reduced, and the installation efficiency is improved.
Claims (3)
1. A plum blossom contact finger installation method is characterized by at least comprising the following steps: firstly, inserting one end of each contact finger into a ring groove of the mounting seat, and enabling the groove wall of the ring groove to cover a spring mounting groove at the first end part of the contact finger; secondly, sleeving a spring from a conical section at one end of the mounting seat, which is back to the annular groove, pushing the spring to move along the conical surface from one end of the mounting seat, which is back to the annular groove, along the axial direction of the annular groove, and enabling the spring to slip from one end of the mounting seat, which is provided with the annular groove, and enter a middle spring mounting groove of the contact finger; thirdly, repeatedly installing a second spring for the second time, and sliding the second spring into a second end spring installation groove at one end of the contact finger, which is back to the installation seat; fourthly, inserting one end of the contact finger, which is back to the mounting seat, on the static contact seat, and retreating the mounting seat to expose the spring mounting groove at the first end part; and fifthly, sleeving a spring from the conical section at one end of the mounting seat, which is back to the annular groove, pushing the spring to move along the conical surface along the axial direction of the annular groove from one end of the mounting seat, which is back to the annular groove, and enabling the spring to slip from one end of the mounting seat, which is provided with the annular groove, and enter the first end part spring mounting groove.
2. The method for installing the plum-blossom-shaped contact finger as claimed in claim 1, wherein the mounting base is inverted before the first step, the socket of the ring groove faces upwards, after the first step is completed, the mounting base and the contact finger installed in the mounting base are vertically inverted, the contact finger is located below the mounting base, and one end of the contact finger located outside the ring groove is pressed on the plane.
3. The method for mounting a plum blossom contact finger as claimed in claim 1 or 2, wherein the contact finger does not completely come off the ring groove when the mounting base is retreated in the fourth step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811536170.6A CN111326358A (en) | 2018-12-14 | 2018-12-14 | Plum-blossom contact finger installation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811536170.6A CN111326358A (en) | 2018-12-14 | 2018-12-14 | Plum-blossom contact finger installation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111326358A true CN111326358A (en) | 2020-06-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811536170.6A Pending CN111326358A (en) | 2018-12-14 | 2018-12-14 | Plum-blossom contact finger installation method |
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| Country | Link |
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| CN (1) | CN111326358A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114888758A (en) * | 2022-06-06 | 2022-08-12 | 国网山东省电力公司平邑县供电公司 | Contact finger spring replacer for indoor vacuum circuit breaker |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19612273C1 (en) * | 1996-03-28 | 1997-10-02 | E I B S A | Switch contact-pair for medium and high voltage load disconnecting switch of overhead lines, transformers. HV motors and capacitors etc |
| CN201975274U (en) * | 2010-12-17 | 2011-09-14 | 上海华通开关厂有限公司 | Special spring for tulip contact |
| CN102779691A (en) * | 2012-07-05 | 2012-11-14 | 河南平高电气股份有限公司 | Contact finger spring assembly tooling |
| CN104091707A (en) * | 2014-07-14 | 2014-10-08 | 国网河南省电力公司商丘供电公司 | Quick installation device for clamping spring of plum blossom contact of switch |
| CN203871278U (en) * | 2014-06-17 | 2014-10-08 | 国家电网公司 | Breaker plum blossom contact finger spring mounting tool |
| CN203983090U (en) * | 2014-07-14 | 2014-12-03 | 国网河南省电力公司商丘供电公司 | Plum blossom contact for switching fastening spring rapid installation device |
| CN204424124U (en) * | 2015-03-26 | 2015-06-24 | 国网河南省电力公司商丘供电公司 | Plum blossom contact for switching fastening spring rapid installation device |
| CN204424121U (en) * | 2015-03-24 | 2015-06-24 | 厦门市湖里星光金属制品工业有限公司 | A kind of Mume flower contact spring fitting device |
| CN205828211U (en) * | 2016-06-28 | 2016-12-21 | 湖南长高成套电器有限公司 | A kind of chopper Mume flower contact erecting device |
| CN207052496U (en) * | 2017-06-27 | 2018-02-27 | 厦门安普格电气有限公司 | A kind of Mume flower contact spring installation fixture |
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2018
- 2018-12-14 CN CN201811536170.6A patent/CN111326358A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19612273C1 (en) * | 1996-03-28 | 1997-10-02 | E I B S A | Switch contact-pair for medium and high voltage load disconnecting switch of overhead lines, transformers. HV motors and capacitors etc |
| CN201975274U (en) * | 2010-12-17 | 2011-09-14 | 上海华通开关厂有限公司 | Special spring for tulip contact |
| CN102779691A (en) * | 2012-07-05 | 2012-11-14 | 河南平高电气股份有限公司 | Contact finger spring assembly tooling |
| CN203871278U (en) * | 2014-06-17 | 2014-10-08 | 国家电网公司 | Breaker plum blossom contact finger spring mounting tool |
| CN104091707A (en) * | 2014-07-14 | 2014-10-08 | 国网河南省电力公司商丘供电公司 | Quick installation device for clamping spring of plum blossom contact of switch |
| CN203983090U (en) * | 2014-07-14 | 2014-12-03 | 国网河南省电力公司商丘供电公司 | Plum blossom contact for switching fastening spring rapid installation device |
| CN204424121U (en) * | 2015-03-24 | 2015-06-24 | 厦门市湖里星光金属制品工业有限公司 | A kind of Mume flower contact spring fitting device |
| CN204424124U (en) * | 2015-03-26 | 2015-06-24 | 国网河南省电力公司商丘供电公司 | Plum blossom contact for switching fastening spring rapid installation device |
| CN205828211U (en) * | 2016-06-28 | 2016-12-21 | 湖南长高成套电器有限公司 | A kind of chopper Mume flower contact erecting device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114888758A (en) * | 2022-06-06 | 2022-08-12 | 国网山东省电力公司平邑县供电公司 | Contact finger spring replacer for indoor vacuum circuit breaker |
| CN114888758B (en) * | 2022-06-06 | 2024-01-30 | 国网山东省电力公司平邑县供电公司 | Indoor vacuum circuit breaker contact finger spring dismounting device |
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Application publication date: 20200623 |