CN218445679U - Seal structure, terminal button box for electric energy meter and electric energy meter - Google Patents
Seal structure, terminal button box for electric energy meter and electric energy meter Download PDFInfo
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- CN218445679U CN218445679U CN202222624303.3U CN202222624303U CN218445679U CN 218445679 U CN218445679 U CN 218445679U CN 202222624303 U CN202222624303 U CN 202222624303U CN 218445679 U CN218445679 U CN 218445679U
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Abstract
The utility model relates to a sealing structure, which comprises a plastic piece (1), a metal piece (2) and an elastic sealing ring (3), wherein the plastic piece (1) is provided with a through hole; the metal piece (2) is arranged in the through hole; the elastic sealing ring (3) is sleeved on the periphery of the metal piece (2); still including suit in elasticity sealing washer (3) periphery and be located through-hole plastics sheath (4), this plastics sheath (4) and elasticity sealing washer (3) interference fit to this plastics sheath (4) and working of plastics (1) adopt same material and both combine together when working of plastics (1) are moulded plastics. Through setting up the plastic sheath, the molten state plastics and the plastic sheath for forming the working of plastics adopt same material and the shrinkage degree after both coolings is unanimous, and the molten state plastics that are used for forming the working of plastics solidify the back like this and with the mutual adhesion of plastic sheath and fuse into an organic whole, be difficult to gapped between the two, the leakproofness is better, is favorable to improving protection level.
Description
Technical Field
The utility model belongs to the technical field of it is sealed, concretely relates to seal structure, be used for terminal box and electric energy meter of electric energy meter.
Background
In order to improve the sealing performance, the plastic part is often integrally formed with the metal part in an injection molding manner, for example, the plastic part is adopted in the box body of the electric energy meter terminal box, the metal part is adopted in the terminal, and the plastic part and the terminal are integrally formed through injection molding. In the injection molding process, the molten plastic used for forming the plastic part wraps the metal part, and when the molten plastic shrinks after being cooled, the metal part is cooled but does not shrink, so that a gap is easily formed between the plastic part and the metal part, and sealing is not facilitated.
For this purpose, some of the applicant has fitted an elastic seal ring around the outer periphery of the metal member, and engaged the metal member and the plastic member in a sealing manner by the elastic seal ring.
However, the above structure still has a certain probability of the occurrence of a situation in which the sealing effect is not good.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the first technical problem that will solve is the current situation to prior art, provides a better, the rational in infrastructure seal structure of leakproofness.
The utility model aims to solve the second technical problem that a terminal box for electric energy meter is provided.
The utility model aims to solve the third technical problem that an electric energy meter is provided.
The utility model provides a technical scheme that above-mentioned first technical problem adopted does: a sealing structure comprises a plastic part with a through hole;
the metal piece is arranged in the through hole;
the elastic sealing ring is sleeved on the periphery of the metal piece;
the method is characterized in that:
the plastic sheath is sleeved on the periphery of the elastic sealing ring and positioned in the through hole, the plastic sheath is in interference fit with the elastic sealing ring, and the plastic sheath and the plastic part are made of the same material and are integrated when the plastic part is injected.
In order to limit the elastic sealing ring, the outer peripheral wall of the metal piece is provided with an annular groove at a position in the through hole, and the annular groove is used for limiting the elastic sealing ring. So, conveniently fix a position when the installation, when the working of plastics was moulded plastics simultaneously, the position of elastic sealing ring also is difficult for changing.
The elastic sealing ring can be formed in various ways, and in order to reduce the assembling process, the elastic sealing ring is formed after liquid glue in the annular groove is solidified. So, pour into annular groove with liquid glue through modes such as injection, the liquid glue forms the elasticity sealing washer after solidifying, compares the mode of putting the elasticity sealing washer suit outside the metalwork, can reduce the process of assembly.
In order to position the elastic sealing element, the peripheral wall of the metal piece is provided with a reducing section and a step part is formed, the elastic sealing ring is sleeved on the periphery of the reducing section, and the corresponding step surface of the step part is used for abutting against the plastic sheath. In this way, the position of the elastic sealing member is conveniently located.
The utility model provides a technical scheme that above-mentioned second technical problem adopted does: the utility model provides a terminal box for electric energy meter which characterized in that: including the sealing structure as described above.
According to one scheme, the plastic part is a box body of the terminal box, the metal part is part of the wiring terminal, and the wiring terminal is used for being electrically connected with an external lead.
The metal piece can have various structures, and preferably, the extending direction of the through hole is the front-back direction for facilitating wiring;
the metal piece comprises a rod body of the wiring terminal, the front part of the rod body is used for inserting an external wire, the plastic sheath is arranged outside the peripheral wall of the middle part of the rod body, and the rear part of the rod body extends out of the box body.
Therefore, the front part of the rod body is convenient for the insertion of an external lead, and the rear part of the rod body is convenient for being connected with a circuit board and the like.
In order to be stably connected with the plastic part, the metal part comprises a first section, a second section and a third section which are sequentially connected in the front-back direction;
the first section is provided with a hollow inner cavity which is open towards the back and a top opening which is communicated with the hollow inner cavity, the hollow inner cavity is used for inserting an external lead, and the top opening is used for inserting a bolt of a wiring terminal;
the outer diameter of the second section is smaller than that of the first section, and the elastic sealing ring and the plastic sheath are sleeved on the periphery of the second section;
the outer diameter of the third section is smaller than that of the first section.
Therefore, the periphery of the metal piece is uneven, the contact area of the metal piece and the plastic piece is large, and the metal piece and the plastic piece are stably connected.
The utility model provides a technical scheme that above-mentioned third technical problem adopted does: an electric energy meter, characterized by: including the sealing structure described above.
The utility model provides a technical scheme that above-mentioned third technical problem adopted does: an electric energy meter, characterized by: comprising a terminal box for an electric energy meter as described above.
Compared with the prior art, the utility model has the advantages of: through setting up the plastic sheath, during moulding plastics, a molten state plastics parcel plastic sheath and the exposed region of metalwork for forming the working of plastics, the periphery of plastic sheath receives the effect of molten state plastics and the local melting, because the molten state plastics and the plastic sheath that are used for forming the working of plastics adopt same material and the shrinkage after both cool is unanimous, solidify the back with the plastic sheath each other and fuse as the molten state plastics that are used for forming the working of plastics like this, be difficult to gapped between the two, the leakproofness is better between so plastic sheath and the working of plastics, in addition the elastic sealing circle respectively with the internal perisporium of plastic sheath and the peripheral wall sealing cooperation of metalwork corresponding position, the leakproofness is better like this, be favorable to improving protection level.
Drawings
Fig. 1 is a schematic perspective view of a terminal box including a sealing structure according to an embodiment of the present invention;
FIG. 2 is an exploded view of FIG. 1;
fig. 3 is a partial sectional view of a metal member in the terminal box according to the present embodiment;
fig. 4 isbase:Sub>A cross-sectional view taken alongbase:Sub>A-base:Sub>A of fig. 1.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
As shown in fig. 1 to 4, a preferred embodiment of the electric energy meter terminal box including the sealing structure of the present invention is shown.
The sealing structure comprises a plastic piece 1, a metal piece 2, an elastic sealing ring 3 and a plastic sheath 4.
Wherein, the plastic part 1 is provided with a through hole extending along the front and back direction.
Referring to fig. 3, the metal member 2 is disposed in the through hole; the peripheral wall of the metal piece 2 has an annular groove 21 at a position inside the through hole, and the annular groove 21 is used for limiting the elastic sealing ring 3. The outer peripheral wall of the metal fitting 2 has a reduced diameter section and a stepped portion is formed, the elastic seal ring 3 is fitted around the outer periphery of the reduced diameter section (i.e., a second section 22 described below), and the stepped portion has a corresponding stepped surface 22 for abutting against the plastic sheath 4.
Referring to fig. 3 and 4, the elastic sealing ring 3 is sleeved on the periphery of the metal part 2, and preferably, the elastic sealing ring 3 is formed by solidifying liquid glue in the annular groove 21, for example, by injecting the liquid glue into the annular groove through a syringe, which can be performed manually or automatically.
Referring to fig. 3 and 4, the plastic sheath 4 is sleeved on the periphery of the elastic sealing ring 3 and is located in the through hole, the plastic sheath 4 is in interference fit with the elastic sealing ring 3, and the plastic sheath 4 and the plastic part 1 are made of the same material and are integrated when the plastic part 1 is injected.
The utility model also provides an end button box for electric energy meter, include such as above-mentioned seal structure. At this moment, working of plastics 1 is the box body of terminal box, and metalwork 2 is binding post's part, and this binding post is used for being connected with external wire electricity. The extending direction of the through hole is the front-back direction; the metal piece 2 comprises a connecting terminal rod body (the metal piece 2 is a copper rod of the connecting terminal), the front part of the rod body is used for inserting an external lead, the plastic sheath 4 is arranged outside the outer peripheral wall of the middle part of the rod body, and the rear part of the rod body extends out of the box body. The metal piece 2 comprises a first section 23, a second section 24 and a third section 25 which are connected in sequence along the front-back direction; the first section 23 has a hollow inner cavity opened backward for inserting an external wire and a top opening communicated with the hollow inner cavity for inserting a bolt of a wiring terminal; the outer diameter of the second section 24 is smaller than that of the first section 23, and the elastic sealing ring 3 and the plastic sheath 4 are sleeved on the periphery of the second section 24; the third section 25 has an outer diameter smaller than the outer diameter of the first section 23.
The utility model also provides an electric energy meter, be used for the terminal button box of electric energy meter including foretell seal structure, the aforesaid.
The sealing structure can be used for electric energy meters, other meters or other shell structures with high requirements on sealing performance.
The working principle and the using process of the sealing structure of the novel embodiment are as follows.
Before injection molding, the elastic sealing ring 3 is sleeved outside the metal piece 2, the plastic sheath 4 is sleeved outside the elastic sealing ring 3, then the plastic sheath is placed in a mold for injection molding, molten plastic for forming the plastic piece 1 wraps the plastic sheath 4 and the exposed area of the metal piece 2, the plastic sheath 4 is partially melted under the action of the molten plastic, the molten plastic for forming the plastic piece 1 and the plastic sheath 4 are made of the same material, so that the molten plastic for forming the plastic piece 1 is adhered to the plastic sheath 4 to be integrated, the plastic sheath 4 and the plastic piece 1 are good in sealing performance, the elastic sealing ring 3 is respectively in sealing fit with the inner peripheral wall of the plastic sheath 4 and the outer peripheral wall of the corresponding position of the metal piece 2, the sealing performance is good, the protection level can be improved, and the protection level can reach IP68.
Claims (10)
1. A seal structure comprises
A plastic part (1) having a through hole;
a metal piece (2) arranged in the through hole;
the elastic sealing ring (3) is sleeved on the periphery of the metal piece (2);
the method is characterized in that:
still including suit in elasticity sealing washer (3) periphery and be located through-hole plastics sheath (4), this plastics sheath (4) and elasticity sealing washer (3) interference fit to this plastics sheath (4) and working of plastics (1) adopt same material and both fuse into an organic whole when working of plastics (1) are moulded plastics.
2. The seal structure of claim 1, wherein: the peripheral wall of the metal piece (2) is provided with an annular groove (21) at a position in the through hole, and the annular groove (21) is used for limiting the elastic sealing ring (3).
3. The seal structure according to claim 1, characterized in that: the elastic sealing ring (3) is formed by solidifying liquid glue in the annular groove (21).
4. The seal structure of claim 1, wherein: the periphery wall of metalwork (2) has the reducing section and is formed with the step portion, elasticity sealing washer (3) suit is in the periphery of reducing section to the corresponding step face (22) of step portion is used for propping up with plastics sheath (4).
5. The utility model provides a terminal button box for electric energy meter which characterized in that: comprising a sealing structure according to any one of claims 1 to 4.
6. The terminal box according to claim 5, wherein: the plastic part (1) is a box body of the terminal box, the metal part (2) is a part of the wiring terminal, and the wiring terminal is used for being electrically connected with an external lead.
7. The terminal box according to claim 6, wherein: the extending direction of the through hole is the front-back direction;
the metal piece (2) comprises a rod body of the wiring terminal, an external lead is inserted into the front portion of the rod body, the plastic sheath (4) is arranged on the outer peripheral wall of the middle portion of the rod body, and the rear portion of the rod body extends out of the box body.
8. The terminal box according to claim 7, wherein: the metal piece (2) comprises a first section (23), a second section (24) and a third section (25) which are sequentially connected in the front-back direction;
the first section (23) is provided with a hollow inner cavity which is open towards the back and a top opening which is communicated with the hollow inner cavity, the hollow inner cavity is used for inserting an external lead, and the top opening is used for inserting a bolt of a wiring terminal;
the outer diameter of the second section (24) is smaller than that of the first section (23), and the elastic sealing ring (3) and the plastic sheath (4) are sleeved on the periphery of the second section (24);
the third section (25) has an outer diameter smaller than the outer diameter of the first section (23).
9. An electric energy meter, characterized by: comprising a sealing structure according to any one of claims 1 to 4.
10. An electric energy meter, characterized by: comprising a terminal box for an electric energy meter according to any one of claims 5 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222624303.3U CN218445679U (en) | 2022-09-30 | 2022-09-30 | Seal structure, terminal button box for electric energy meter and electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222624303.3U CN218445679U (en) | 2022-09-30 | 2022-09-30 | Seal structure, terminal button box for electric energy meter and electric energy meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218445679U true CN218445679U (en) | 2023-02-03 |
Family
ID=85085348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222624303.3U Active CN218445679U (en) | 2022-09-30 | 2022-09-30 | Seal structure, terminal button box for electric energy meter and electric energy meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218445679U (en) |
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2022
- 2022-09-30 CN CN202222624303.3U patent/CN218445679U/en active Active
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