CN203721622U - A bi-directional insulation pull rod - Google Patents
A bi-directional insulation pull rod Download PDFInfo
- Publication number
- CN203721622U CN203721622U CN201420103657.6U CN201420103657U CN203721622U CN 203721622 U CN203721622 U CN 203721622U CN 201420103657 U CN201420103657 U CN 201420103657U CN 203721622 U CN203721622 U CN 203721622U
- Authority
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- China
- Prior art keywords
- butting section
- connecting axle
- cavity
- spring
- tension pole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000009413 insulation Methods 0.000 title abstract description 6
- 230000003068 static effect Effects 0.000 claims abstract description 16
- 230000007246 mechanism Effects 0.000 claims description 9
- 230000007704 transition Effects 0.000 claims description 5
- 238000011161 development Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000012545 processing Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model discloses a bi-directional insulation pull rod comprising a pull rod body. One end of the pull rod body is connected with a connecting rod and the other end of the pull rod body is provided with a hollow cavity. A first connecting shaft is disposed in the hollow cavity. The end, which extends out of an opening of the hollow cavity, of the first connecting shaft is connected with a second connecting shaft and the second connecting shaft is connected with a contact connecting rod. The section, which is located in the hollow cavity, of the first connecting shaft is sleeved by a spring. The end, which is close to the bottom of the hollow cavity, of the spring abuts on a first abutting part and a hollow cavity abutting part, and the other end of the spring abuts on a second abutting part and a third abutting part; the third abutting part can move leftward and rightward in the axial direction of the first connecting shaft relative to the second abutting part; and the second abutting part is detachably connected with the hollow cavity. With one end provided with the hollow cavity, the insulation pull rod enables a moving contact to be contacted with a grounding static contact or a closing static contact with voltage. The insulation pull rod is simple in structure and convenient to machine, reduces the manufacture cost greatly and improves the production efficiency.
Description
Technical field
The utility model relates to three-station actuating technical field, particularly relates to a kind of two-way insulated tension pole for three station vacuum interrupters.
Background technology
At present, absolutely mostly can only realize double operation for the insulated tension pole of high-voltage switch gear vacuum interrupter operation, this insulated tension pole can only be realized the function of combined floodgate and separating brake, and there is no grounding function, this has just affected the use of the switch with three station functions in high voltage vacuum interrupter, and some Corporation R & Ds have gone out the insulated tension pole that is applicable to three station high-voltage switch gears for this reason.
As Chinese patent literature CN102420073A discloses a kind of Bidirectional load insulating draw bar, it comprises insulated tension pole body, this insulated tension pole body is by first, two, three insulated tension pole bodies form, this external surface of insulated tension pole is provided with some skirt umbrellas, second, the right side of three insulated tension pole bodies, left end is respectively equipped with first, two insert pocket, first, two inserts are installed on respectively first, in two insert pocket, the first inserts right-hand member, the second inserts left end is respectively equipped with first, two mounting grooves, second, one connecting axle is installed on respectively first, in two mounting grooves, first, two nuts are bolted in respectively first, in two mounting grooves, second, on one connecting axle, install respectively first, two springs, the first both ends of the spring is against respectively on the first mounting groove and the second connecting axle, the second both ends of the spring be against respectively on the second nut and the first connecting axle on.Although the Bidirectional load insulating draw bar of this utility model can be realized the function of three stations, but the contact pressure that it closes a floodgate and landing operation is required must be realized by the second spring that is arranged on the first spring in the first mounting groove and be arranged in the second mounting groove respectively, and then the too fat to move complexity of the structure that causes these insulated tension pole two ends, parts are more, and difficulty of processing is larger, cost of manufacture is higher.
Utility model content
For this reason, the technical problems to be solved in the utility model is the existing too fat to move complexity of insulated tension pole structure for tri-station isolating switch, and parts are more, and difficulty of processing is large, and cost of manufacture is high.
The purpose of this utility model is to provide a kind of two-way insulated tension pole with three station manipulation functions, and these two-way insulated tension pole parts are less, simple in structure, and be convenient to processing, cost of manufacture is lower.
For achieving the above object, the utility model is by the following technical solutions:
A kind of two-way insulated tension pole, comprises bar body; One end of described bar body is connected with connecting rod, and described connecting rod is connected with operating mechanism; The other end of described bar body is provided with cavity, in described cavity, be provided with the first connecting axle along the axis direction of described bar body, one end of extending described cavity opening of described the first connecting axle is connected with the second connecting axle, and described the second connecting axle is connected with contact connecting rod; One section of described cavity of being positioned at of described the first connecting axle is arranged with spring, described spring is resisted against respectively and is arranged at the first butting section on described the first connecting axle and is arranged on the cavity butting section in described cavity near one end of described cavity bottom, and bottom described the first butting section and described cavity, tool is at regular intervals; The described spring other end be resisted against described cavity opening part setting the second butting section and be arranged on described the first connecting axle or described the second connecting axle on the 3rd butting section on, described the 3rd butting section can the axis direction side-to-side movement along described the first connecting axle with respect to described the second butting section, and described the second butting section and described cavity removably connect; When described bar body is positioned at initial position, the moving contact of described contact interlinking lever end separates with combined floodgate fixed contact and grounding static contact; When described bar body moves left and right vertically, under the resilient force of described spring, described contact connecting rod drives described moving contact and described grounding static contact or described combined floodgate fixed contact band press contacts, realizes closing operation.
The bottom of described cavity is provided with guiding groove, the diameter of described guiding groove is less than the diameter of described cavity, the transition boss of described guiding groove and described cavity forms described cavity butting section, described the first butting section is placed in described guiding groove, and described the first butting section can be along the axial motion of described bar body in described guiding groove with described the first connecting axle.
One end that described the second connecting axle is connected with described the first connecting axle is sleeve, and described jacket casing is located at the end of described the first connecting axle, and fixes by bearing pin; Described the second butting section slip cap is located on described sleeve, and the end of described sleeve forms described the 3rd butting section.
Between described the first butting section and the end face of described spring, the first spring base is set, described the first spring base is pressed against on described cavity butting section; Between described the second butting section and the end face of described spring, the second spring base is set, described the second spring base is resisted against on described the 3rd butting section.
Initial distance between described the first spring base and described the second spring base is less than the free development length of described spring.
Described the first butting section is fixedly connected on the end of described the first connecting axle.
Described the first butting section and described the first connecting axle are one-body molded.
The inner side of described cavity is fixedly installed inserts, and the inner chamber of described inserts is for coordinating with described the first connecting axle, described spring, described the first butting section, described the second butting section and described the first spring base, described the second spring base.
Threaded engagement between the inwall of the outer wall of described the second butting section and described inserts opening part.
Described bar body is embedded with insert nut with one end that described connecting rod coordinates, the end of described connecting rod and described embedded nut threaded engagement.
The beneficial effects of the utility model:
1. one end of insulated tension pole of the present utility model is provided with cavity, and by the one section of sheathed spring that is positioned at cavity of the first connecting axle, described spring is resisted against respectively and is arranged at the first butting section on the first connecting axle and is arranged on the cavity butting section in cavity near one end of cavity bottom, and bottom the first butting section and cavity, tool is at regular intervals; The described spring other end be resisted against cavity opening part setting the second butting section and be arranged on described the first connecting axle or described the second connecting axle on the 3rd butting section on, the 3rd butting section can the axis direction side-to-side movement along the first connecting axle with respect to the second butting section, and described the second butting section and described cavity removably connect.Said structure of the present utility model makes insulated tension pole only need cavity be set in its one end, in the time of closing position, coordinate Compress Spring by cavity butting section and the 3rd butting section, to realize moving contact and combined floodgate fixed contact band press contacts, in the time of earthing position, coordinate Compress Spring by the first butting section and the second butting section, to realize moving contact and grounding static contact band press contacts; And being placed between combined floodgate fixed contact and grounding static contact, moving contact can realize separating brake; Compare the existing insulated tension pole with three station functions, two-way insulated tension pole structure of the present utility model is simpler, is convenient to processing, can greatly reduce cost of manufacture, enhances productivity.
2. in two-way insulated tension pole of the present utility model, the bottom of its cavity is provided with guiding groove, the diameter of guiding groove is less than the diameter of cavity, the transition boss of guiding groove and cavity has formed cavity butting section, the moulding process of this cavity butting section is simple, and the first butting section is placed in guiding groove, there is certain interval with described guiding groove bottom, make the first butting section can be along the axial motion of described bar body in guiding groove with the first connecting axle, finally realize moving contact and grounding static contact or combined floodgate fixed contact band press contacts.
3. in two-way insulated tension pole of the present utility model, one end that the second connecting axle is connected with the first connecting axle is sleeve, and jacket casing is located at the end of the first connecting axle, and fixes by bearing pin; The second butting section slip cap is located on sleeve, and the end of sleeve forms the 3rd butting section, drives the second butting section to slide along sleeve in the time that bar body moves left and right.
3. in two-way insulated tension pole of the present utility model, between the first butting section and the end face of spring, the first spring base is set, the first spring base is pressed against on cavity butting section; Between the second butting section and the end face of spring, the second spring base is set, the second spring base is resisted against on the 3rd butting section.Can make to drive pull bar to move by above-mentioned the first spring base and the second spring base are set time, guarantee that spring stress is even, move more stable, the reliability while further having ensured the switch ground connection, combined floodgate of three station functions and separating brake.
4. the initial distance between the first spring base of the present utility model and the second spring base is less than the free extended length of spring, and this design has ensured that normal condition lower spring has certain decrement, and the large I of this decrement is decided according to the actual requirements.By spring is had to certain decrement when initial, can greatly improve the work response speed of whole insulated tension pole, improve pull bar performance.
5. bar body outer surface of the present utility model is provided with some edges and is circumferentially arranged at intervals with some full skirts, and this full skirt can increase creepage distance of insulation, improves the insulating properties of insulated tension pole.
Brief description of the drawings
For the content that makes utility model is more likely to be clearly understood, according to specific embodiment of the utility model also by reference to the accompanying drawings, the utility model is described in further detail, wherein below
Fig. 1 is the structural representation of two-way insulated tension pole of the present utility model;
Fig. 2 is the structural representation of two-way insulated tension pole of the present utility model while coordinating with high pressure arc control device.
In figure, Reference numeral is expressed as:
1-bar body; 2-connecting rod; 3-cavity; 31-guiding groove; 32-cavity butting section; 4-the first connecting axle; 40-spring; 41-the first butting section; 42-the second butting section; 43-the 3rd butting section; 5-the second connecting axle; 51-bearing pin; 52-sleeve; 61-the first spring base; 62-the second spring base; 7-inserts; 8-insert nut; 9-full skirt; 10-vacuum interrupter; 101-contact connecting rod; 102-grounding static contact; 103-moving contact; 104-combined floodgate fixed contact.
Embodiment
Referring to Fig. 1, Fig. 2, the disclosed two-way insulated tension pole of the utility model, comprises bar body 1, and the outer surface of described bar body 1 along the circumferential direction interval arranges the full skirt that several diameter do not wait, described full skirt can increase creepage distance of insulation, improves the insulating properties of insulated tension pole; One end of described bar body 1 is connected with connecting rod 2, and described connecting rod 2 is connected with operating mechanism; The other end of described bar body 1 is provided with cavity 3, the interior axis direction along described bar body 1 of described cavity 3 is provided with the first connecting axle 4, one end of extending described cavity 3 openings of described the first connecting axle 4 is connected with the second connecting axle 5, and described the second connecting axle 5 is connected with contact connecting rod 101; One section of described cavity 3 of being positioned at of described the first connecting axle 4 is arranged with spring 40, described spring 40 is resisted against respectively and is arranged at the first butting section 41 on described the first connecting axle 4 and is arranged on the cavity butting section 32 in described cavity 3 near one end of described cavity 3 bottoms, and described the first butting section 41 is at regular intervals with described cavity 3 bottom tools; Described spring 40 other ends be resisted against described cavity 3 opening part setting the second butting section 42 and be arranged on the 3rd butting section 43 on described the first connecting axle 4 or on described the second connecting axle 5, described the 3rd butting section 43 can the axis direction side-to-side movement along described the first connecting axle 4 with respect to described the second butting section 42, and described the second butting section 42 removably connects with described cavity 3.Insulated tension pole of the present utility model only need arrange in its one end cavity 3, in the time connecting combined floodgate, coordinate Compress Spring by cavity butting section 32 and the 3rd butting section 43, be with press contacts to realize moving contact 103 with combined floodgate fixed contact 104, in the time of earthing position, coordinate Compress Spring by the first butting section 41 and the second butting section 42, be with press contacts to realize moving contact 103 with grounding static contact 102; And being placed between combined floodgate fixed contact 104 and grounding static contact 102, moving contact 103 can realize separating brake; Compare the existing insulated tension pole with three station functions, two-way insulated tension pole structure of the present utility model is simpler, is convenient to processing, can greatly reduce cost of manufacture, enhances productivity
In the present embodiment, the bottom of described cavity 3 is provided with guiding groove 31, and described the first butting section 41 is placed in described guiding groove 31, and described the first butting section 41 can be along the axial motion of described bar body 1 in described guiding groove 31 with described the first connecting axle 4; The diameter of described guiding groove 31 is slightly less than the diameter of described cavity 3, and this can ensure that described the first butting section 41 is in the interior motion of described guiding groove 31, motion vertically, and the while can also ensure the stability of its motion.In addition, described guiding groove 31 forms described cavity butting section 32 with the transition boss of described cavity 3, and this transition boss is convenient to machine-shaping, is also convenient to assemble described the first connecting axle 4 and described spring 40 simultaneously.
In the present embodiment, between described the first butting section 41 and the end face of described spring 40, the first spring base 61 is set, described the first spring base 61 is pressed against on described cavity butting section 32; Between described the second butting section 42 and the end face of described spring 40, the second spring base 62 is set, described the second spring base 62 is resisted against on described the 3rd butting section 43.Can make the two ends of described spring 40 directly conflict on two spring bases by the first spring base 61 and the second spring base 62 are set, guarantee that spring 40 is stressed evenly, and then extend the useful life of spring 40.
In the present embodiment, initial distance between described the first spring base 61 and described the second spring base 62 is less than the free development length of described spring 40, this has just ensured that normal condition lower spring has certain decrement, and the large I of this decrement is decided according to the actual requirements.By spring is had to certain decrement when initial, can greatly improve the work response speed of whole insulated tension pole, improve pull bar performance.
Described the second connecting axle 5 in the present embodiment is sleeve 52 with one end that described the first connecting axle 4 is connected, and described sleeve 52 is set in the end of described the first connecting axle 4, and fixing by bearing pin 51; Described the second butting section 42 is sheathed on described sleeve 52, and the end of described sleeve 52 forms described the 3rd butting section 43 against described the second spring base 62.Be arranged to tube-in-tube structure in the end of described the second connecting axle 52 and described the 3rd butting section 43 is served as in the end of described sleeve 5, both be convenient to the assembling maintenance between described the first connecting axle 4 and described the second connecting axle 5, reduce again amount of parts simultaneously, cost-saving.
Described the first butting section 41 in the present embodiment is one-body molded with described the first connecting axle 4, also processes described the first butting section that diameter is greater than described the first connecting axle 4 and is less than described guiding groove 31 in one end of close described cavity 3 bottoms of described the first connecting axle 4.Certainly, in other embodiments, described the first butting section 41 can be to be also threaded connection or the mode such as welding is fixedly connected with described the first connecting axle 4.
In the present embodiment, the inner side of described cavity 3 is fixedly installed inserts 7, and the inner chamber of described inserts 7 is for coordinating with described the first connecting axle 4, described spring 40, described the first butting section 41, described the second butting section 42 and described the first spring base 61, described the second spring base 62.General nylon and the glass fibre of adopting of bar body 1 of the present utility model is mixed, and general rigidity, the good metal material of hardness of adopting of inserts 7 made, this setup not only can strengthen the bulk strength of the utility model pull bar, and described inserts 7 is more durable simultaneously, not easy to wear destroying.
In the present embodiment, between the outer wall of described the second butting section 42 and the inwall of described inserts 7 opening parts, adopt threaded engagement, so that assembly and disassembly.
In the present embodiment, described bar body 1 is embedded with insert nut 8 with one end that described connecting rod 2 coordinates, the end of described connecting rod 2 and described embedded nut 8 threaded engagement.
Referring to Fig. 1-2, operation principle of the present utility model is:
In figure shown in 2 is to be positioned at initial position after insulated tension pole of the present utility model is connected with arc control device, the structural representation while being also open position, and now described moving contact 103 is between described grounding static contact 102 and described combined floodgate fixed contact 104.
Closing operation: operating mechanism drives described connecting rod 2 to move right and then drive described bar body 1, described the first connecting axle 4, the second connecting axle 5 synchronously to move right, after described moving contact 103 touches combined floodgate fixed contact 104, described combined floodgate fixed contact 104 has stoped described moving contact 103 to continue to move right, and described the first connecting axle 4 and described the second connecting axle 5 also stop moving to the right simultaneously; And now operating mechanism can continue to promote described connecting rod 2 and described bar body 1 continues to move to the right, described cavity butting section 32 can with described bar body 1 move right and with the 3rd butting section 43 acting in conjunction Compress Springs 40, and then make described moving contact 103 be with press contacts with described combined floodgate fixed contact 104, in the time reaching setting contact, described operating mechanism stops action.
Ground connection operation: when described operating mechanism drives described connecting rod 2 open position as shown in Figure 2 to move to the left, and then drive described bar body 1, described the first connecting axle 4, the second connecting axle 5 to left movement, in the time that described moving contact 103 contacts with described grounding static contact 102, described grounding static contact 102 stops described moving contact 103 to continue to move to the left, and then has stoped described the first connecting axle 4 and the second connecting axle 5 to continue to left movement; And operating mechanism drives described connecting rod 2 and bar body 1 to continue to left movement, described the second butting section 42 is moved to the left with described bar body 1 and compresses described spring 40 with described the first butting section 41 actings in conjunction, make described moving contact 103 be with press contacts with described grounding static contact 102, in the time reaching setting contact, described operating mechanism stops action.
Above-mentioned embodiment is just explained in detail the technical solution of the utility model; the utility model has more than and is only confined to above-described embodiment; those skilled in the art should be understood that; the above-mentioned principle of every foundation and the improvement of spirit on the utility model basis, substitute, all should be within protection range of the present utility model.
Claims (10)
1. a two-way insulated tension pole, comprises bar body (1); It is characterized in that: one end of described bar body (1) is connected with connecting rod (2), described connecting rod (2) is connected with operating mechanism; The other end of described bar body (1) is provided with cavity (3), in described cavity (3), be provided with the first connecting axle (4) along the axis direction of described bar body (1), one end of extending described cavity (3) opening of described the first connecting axle (4) is connected with the second connecting axle (5), and described the second connecting axle (5) is connected with contact connecting rod (101); One section of described cavity (3) of being positioned at of described the first connecting axle (4) is arranged with spring (40), described spring (40) is resisted against respectively the first butting section (41) being arranged on described the first connecting axle (4) and is arranged at the interior cavity butting section (32) of described cavity (3) upper near one end of described cavity (3) bottom, and described the first butting section (41) is at regular intervals with described cavity (3) bottom tool; Described spring (40) other end be resisted against described cavity (3) opening part arrange the second butting section (42) and be arranged on described the first connecting axle (4) or described the second connecting axle (5) on the 3rd butting section (43) on, described the 3rd butting section (43) can the axis direction side-to-side movement along described the first connecting axle (4) with respect to described the second butting section (42), and described the second butting section (42) removably connects with described cavity (3);
When described bar body (1) is positioned at initial position, the moving contact (103) of described contact connecting rod (101) end separates with combined floodgate fixed contact (104) and grounding static contact (102); When described bar body (1) moves left and right vertically, under the resilient force of described spring (40), described contact connecting rod (101) drives described moving contact (103) and described grounding static contact (102) or described combined floodgate fixed contact (104) band press contacts, realizes closing operation.
2. the two-way insulated tension pole of one according to claim 1, it is characterized in that: the bottom of described cavity (3) is provided with guiding groove (31), the diameter of described guiding groove (31) is less than the diameter of described cavity (3), described guiding groove (31) forms described cavity butting section (32) with the transition boss of described cavity (3), described the first butting section (41) is placed in described guiding groove (31), described the first butting section (41) can be along the axial motion of described bar body (1) in described guiding groove (31) with described the first connecting axle (4).
3. the two-way insulated tension pole of one according to claim 1 and 2, it is characterized in that: one end that described the second connecting axle (5) is connected with described the first connecting axle (4) is sleeve (52), described sleeve (52) is set in the end of described the first connecting axle (4), and fixing by bearing pin (51); It is upper that described the second butting section (42) slip cap is located at described sleeve (52), and the end of described sleeve (52) forms described the 3rd butting section (43).
4. the two-way insulated tension pole of one according to claim 3, it is characterized in that: between described the first butting section (41) and the end face of described spring (40), the first spring base (61) is set, described the first spring base (61) is pressed against on described cavity butting section (32); The second spring base (62) is set between the end face of described the second butting section (42) and described spring (40), and described the second spring base (62) is resisted against on described the 3rd butting section (43).
5. the two-way insulated tension pole of one according to claim 4, is characterized in that: the initial distance between described the first spring base (61) and described the second spring base (62) is less than the free development length of described spring (40).
6. the two-way insulated tension pole of one according to claim 5, is characterized in that: described the first butting section (41) is fixedly connected on the end of described the first connecting axle (4).
7. the two-way insulated tension pole of one according to claim 6, is characterized in that: described the first butting section (41) is one-body molded with described the first connecting axle (4).
8. the two-way insulated tension pole of one according to claim 7, it is characterized in that: the inner side of described cavity (3) is fixedly installed inserts (7), the inner chamber of described inserts (7) is for coordinating with described the first connecting axle (4), described spring (40), described the first butting section (41), described the second butting section (42) and described the first spring base (61), described the second spring base (62).
9. the two-way insulated tension pole of one according to claim 8, is characterized in that: threaded engagement between the outer wall of described the second butting section (42) and the inwall of described inserts (7) opening part.
10. the two-way insulated tension pole of one according to claim 9, it is characterized in that: one end that described bar body (1) coordinates with described connecting rod (2) is embedded with insert nut (8) end of described connecting rod (2) and described embedded nut (8) threaded engagement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420103657.6U CN203721622U (en) | 2014-03-08 | 2014-03-08 | A bi-directional insulation pull rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420103657.6U CN203721622U (en) | 2014-03-08 | 2014-03-08 | A bi-directional insulation pull rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203721622U true CN203721622U (en) | 2014-07-16 |
Family
ID=51160759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420103657.6U Expired - Lifetime CN203721622U (en) | 2014-03-08 | 2014-03-08 | A bi-directional insulation pull rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203721622U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103824724A (en) * | 2014-03-08 | 2014-05-28 | 浙江华仪电器科技有限公司 | Two-way insulating pull rod |
-
2014
- 2014-03-08 CN CN201420103657.6U patent/CN203721622U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103824724A (en) * | 2014-03-08 | 2014-05-28 | 浙江华仪电器科技有限公司 | Two-way insulating pull rod |
| CN103824724B (en) * | 2014-03-08 | 2016-06-15 | 浙江华仪电器科技有限公司 | A kind of two-way insulated tension pole |
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