CN211844447U - Protective box for track circuit - Google Patents
Protective box for track circuit Download PDFInfo
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- CN211844447U CN211844447U CN202020208148.5U CN202020208148U CN211844447U CN 211844447 U CN211844447 U CN 211844447U CN 202020208148 U CN202020208148 U CN 202020208148U CN 211844447 U CN211844447 U CN 211844447U
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- sealing ring
- annular groove
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- annular
- box cover
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Abstract
The utility model provides a protective box for track circuit, which comprises a box body, a sealing ring and a box cover; the opening of the box body is provided with a first annular groove, the inner side of the box cover is provided with a pressing part, or the opening of the box body is provided with a pressing part, and the inner side of the box cover is provided with a first annular groove; the pressing part is provided with a first annular bulge; the sealing ring is matched in the first annular groove, and at least one second annular groove is formed in the sealing ring along the length direction; the box cover is covered on the opening of the box body, the pressing part is matched in the first annular groove, and the first annular bulge is matched in the second annular groove; the box cover is provided with an installation through hole; the sealing washer holds in first ring channel completely to avoid the sealing washer dislocation, lid closes the back on the box body, and the cooperation of clamping part is in first ring channel, thereby avoids the sealed inefficacy that the lock dislocation leads to, and the protruding cooperation of first annular is in the second ring channel again, and sealed effect is better.
Description
Technical Field
The utility model belongs to the track traffic equipment field, in particular to protection box for track circuit.
Background
The current case box that is used for the protection of track circuit outdoor equipment can divide into rectilinear and side lift formula according to the lid mode of opening, and the lid fastens through one or two bolts with the box body, and sealed effect is poor between lid and the box body, awaits urgent need the improvement.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model provides a protective box for a track circuit, which comprises a box body, a sealing ring and a box cover;
the opening of the box body is provided with a first annular groove, the inner side of the box cover is provided with a pressing part, or the opening of the box body is provided with a pressing part, and the inner side of the box cover is provided with a first annular groove;
the pressing part is provided with a first annular bulge;
the sealing ring is matched in the first annular groove, and at least one second annular groove is formed in the sealing ring along the length direction;
the box cover is covered on the opening of the box body, the pressing part is matched in the first annular groove, and the first annular bulge is matched in the second annular groove;
the box cover is provided with an installation through hole.
Preferably, the sealing ring is provided with at least two second annular bulges along the length direction, and a second annular groove is formed between any two adjacent second annular bulges.
Preferably, the sealing ring is hollow inside.
Preferably, the device further comprises a bolt and a limiting ring;
the sealing ring is provided with a through hole, the limiting ring is coaxially matched in the through hole, and the axial length of the limiting ring is smaller than that of the through hole;
the box body is connected with the box cover through a bolt, and the middle part of the bolt is positioned in the limiting ring.
Preferably, the circumference of the installation through hole is recessed towards the outer side of the box cover to form a groove.
Preferably, the mounting joint comprises a threaded flange, a stop washer, a sealing ring and a locking nut;
the threaded flange is coaxially fixed in the mounting through hole, the stop washer is matched on the threaded flange, the locking nut is matched with the threaded flange, the sealing ring is located in an accommodating cavity formed by the locking nut and the threaded flange, and the sealing ring abuts against the locking nut and the threaded flange.
Preferably, the sealing ring is provided with a plurality of through holes, the axes of the plurality of through holes being parallel to the axis of the sealing ring.
Preferably, the outer side of the case body and the outer side of the case cover are coated with ultraviolet absorbers.
The utility model discloses a protection box for track circuit, the complete holding of sealing washer is in first ring channel to avoid the sealing washer dislocation, lid closes back on the box body, and the cooperation of portion that compresses tightly is in first ring channel, thereby avoids the sealed inefficacy that the lock dislocation leads to, and the protruding cooperation of first annular is in the second ring channel again, and sealed effect is better.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 shows a perspective view of a protective box according to an embodiment of the present invention;
fig. 2 shows a schematic view of the sealing fit between the box body and the box cover according to the embodiment of the present invention;
fig. 3 is a schematic view illustrating a sealing fit between a box body and a box cover according to an embodiment of the present invention;
fig. 4 shows a schematic view of a bolt and a stop collar according to an embodiment of the present invention;
fig. 5 shows a cross-sectional view of a protective case according to an embodiment of the present invention;
FIG. 6 shows a partial enlarged view of FIG. 5;
fig. 7 shows a schematic view of a sealing ring according to an embodiment of the present invention;
FIG. 8 is a partial schematic view of a prior art cassette lid and lead wires;
fig. 9 is a partial schematic view of the box cover and the lead wire according to the embodiment of the present invention.
In the figure, 1-box body, 2-sealing ring, 21-second annular groove, 3-box cover, 41-first annular groove, 42-pressing part, 421-first annular bulge, 51-bolt, 52-limiting ring, 61-threaded flange, 62-stop washer, 63-sealing ring, 64-locking nut, 7-lead wire and 8-cable.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Fig. 1 is a perspective view of a protection box according to an embodiment of the present invention, which includes a box body 1, a sealing ring 2 (not shown in fig. 1), and a box cover 3; the four corners of the box cover 3 are respectively provided with a bulge, the bulges are provided with through holes, and the protective box is arranged on external equipment through the through holes;
referring to fig. 2, the box cover 3 is provided with a pressing part 42, the pressing part 42 extends along the edge of the box cover 3 to form an annular structure, the inner side of the box body 1 is provided with a first annular groove 41, and after the box cover 3 is covered on the box body 1, the pressing part 42 is positioned in the first annular groove 41;
a first annular protrusion 421 is arranged on one side of the pressing part 42, which is far away from the box cover 3, the first annular protrusion 421 extends along the length direction of the pressing part 42 to form an annular structure, and in a state that the pressing part 42 is located in the first annular groove 41, the first annular protrusion 421 is opposite to the bottom of the first annular groove 41, and the pressing part 42 is not completely matched in place in fig. 2;
the sealing ring 2 is matched in the first annular groove 41, the depth of the first annular groove 41 is greater than the thickness of the sealing ring 2, the sealing ring 2 is completely surrounded, dislocation of the sealing ring 2 is avoided, after the sealing ring 2 is matched in the first annular groove 41, a space is also reserved in the first annular groove 41 for accommodating the pressing part 42, sealing failure caused by buckling and dislocation of the box body 1 and the box cover 3 is avoided, the sealing ring 2 is provided with two second annular bulges along the length direction, a second annular groove 21 is formed between the two second annular bulges, the two second bulges surround the first annular bulge 421 under the action of extrusion force, the sealing effect is better, a sealing surface formed between the pressing part 42 and the sealing ring 2 is not a simple plane or an arc surface, and rainwater outside the protective box is more difficult to infiltrate into the protective box;
after the box cover 3 is covered on the opening of the box body 1, the pressing part 42 is matched in the first annular groove 41 and is propped against the sealing ring 2, and the first annular bulge 421 is matched in the second annular groove 21;
the box cover 3 is provided with mounting through holes for mounting the lead wires 7 and the cables 8 so as to connect devices inside the protective box with devices outside the protective box, and specifically, the box cover comprises five mounting through holes, wherein four mounting through holes are used for mounting the lead wires 7, and one mounting through hole in the middle is used for the cables 8 to pass through.
In another design, the first annular groove 41 may be disposed on the box cover 3, the pressing portion 42 is disposed at the opening of the box body 1, other designs are the same, after the box cover 3 is fitted on the box body 1, the pressing portion 42 is fitted in the first annular groove 41, and the first annular protrusion 421 is fitted in the second annular groove 21, which may achieve the same sealing effect.
In another design, referring to fig. 3, the number of the second annular protrusions may be more than two, the plurality of second annular protrusions are arranged in parallel, the second annular groove 21 is formed between any two adjacent second annular protrusions, adaptively, the pressing portion 42 is provided with a plurality of first annular protrusions 421, each first annular protrusion 421 is located in one second annular groove 21, and the sealing ring 2 between the pressing portion 42 and the sealing ring 2 is more bent, so that the sealing effect is better.
In order to improve the sealing effect and reduce the material consumption of the sealing ring 2, the sealing ring 2 in the embodiment is hollow, the hollow cross section is circular, when the pressing portion 42 is extruded with the sealing ring 2, the sealing ring 2 is adaptive to collapse towards the inside, the second annular bulge collapses towards one side of the first annular bulge 421, and then the first annular bulge 421 and the second annular bulge are matched more closely.
In this embodiment, in a state where the pressing portion 42 is located in the first annular groove 41, a gap between a side wall of the pressing portion 42 and a side wall of the first annular groove 41 is as small as possible, so that the pressing portion 42 does not shake in the first annular groove 41 to cause a deviation, and when the box cover 3 is fitted to the box body 1, the first annular protrusion 421 can be fitted in the second annular groove 21 to cause no deviation; the sealing ring 2 is completely surrounded, light rays and external impurities cannot contact the sealing ring 2, and the sealing ring 2 cannot age very quickly.
Specifically, the cross section of the sealing ring 2 in this embodiment is a combination of a semicircle and a rectangle, the diameter of the semicircle is equal to the long side of the rectangle, and adaptively, the bottom of the first annular groove 41 is an arc surface and is in seamless fit with the outer wall of the sealing ring 2, and in another design manner, the cross section of the sealing ring 2 may also be in other shapes, such as rectangle, circle, and the like; the cross sections of the first annular bulge 421 and the second annular bulge are both triangular, the two second annular bulges surround the first annular bulge 421, the sizes of the first annular bulge 421 and the second annular bulge shown in fig. 2 and 3 are only examples, and the first annular bulge 421 and the second annular bulge do not influence the tight fit of the other positions of the compression part 42 and the sealing ring 2; of course, the first annular protrusion 421 and the second annular protrusion may have other shapes, such as a rectangle, a semicircle, etc., and in any shape, the first annular protrusion 421 and the second annular protrusion must be tightly fitted.
The appearance of the box body 1 in the embodiment is roughly in a quadrangular frustum pyramid shape, the box body 1 and the box cover 3 are reliably connected because the protection box is positioned near the track and is influenced by vibration for a long time, and the box body 1 and the box cover 3 are connected through bolts in the embodiment, and particularly comprise four bolts which are respectively positioned in the middle positions of four edges of the box cover 3, so that compared with the existing protection box which is only provided with two fastening points, the locking effect of the box body 1 and the box cover 3 is better, and the sealing effect can reach the IP67 grade; in another design mode, a plurality of hasps with springs can be used for locking the box cover 3 and the box body 1, the maximum allowable pulling force of the selected hasps can reach 250kg, sufficient locking force is guaranteed to be provided, the hasps are convenient to operate, and the hasps can be loosened and locked without tools.
By means of the connection of the bolts 51, the following design can be adopted:
referring to fig. 4, which is a partial schematic view of the sealing ring 2, the sealing ring 2 is provided with two second annular grooves 21, the sealing ring 2 is provided with a plurality of through holes, the through holes are located between the first annular groove 41 and the second annular grooves 21, the limiting ring 52 is coaxially matched in the through holes, the outer wall of the limiting ring 52 is tightly matched with the inner wall of the through holes, the hardness of the limiting ring 52 is high, the limiting ring can be made of metal, plastic and the like, and the axial length of the limiting ring 52 is less than that of;
the bolt 51 penetrates through the limiting ring 52, when the bolt 51 is screwed down, the box cover 3 and the box body 1 gradually compress the sealing ring 2, the distance between the nut and the limiting ring 52 is gradually reduced, when the nut is abutted against the limiting ring 52, the bolt 51 cannot be continuously screwed, and the limiting ring 52 is used for limiting the screwing-in degree of the bolt 51, so that the sealing ring 2 is prevented from being damaged due to excessive compression; in addition, the cross section of the seal ring 2 shown in fig. 4 is different from the cross sections of the seal ring 2 shown in fig. 2 and 3 in the seal ring of the present embodiment, and both cross sections are allowable.
Referring to fig. 5, for the cross-sectional view of protection box, can know from the figure, box body 1 is perpendicular to the cross sectional area of depth direction and from inside to outside crescent to form a step in box body 1 middle part position, 1 opening outside position of box body is equipped with round connecting portion, and first ring channel 41 and the screw hole that is used for the construction bolt open promptly and establish on connecting portion, and on the concrete design of screw hole, a through-hole is seted up on connecting portion, the through-hole order includes first hole section, second hole section and third hole section, and the diameter of first hole section and third hole section is greater than the diameter of second hole section, and second hole section inner wall is equipped with the screw thread for with the bolt cooperation, first hole section is used for the holding nut.
Four installation through holes for installing the lead wires 7 are in a group, two groups of installation through holes are close to two short sides of the box cover 3 respectively, and the installation through holes for the cables 8 to pass through are located in the middle of the box cover 3.
The lead wire hole and the cable hole of the existing protection box have no sealing measures, glue pouring sealing is needed on site, operability is poor, sealing performance is not strong, in order to facilitate operation and improve sealing performance, the lead wire 7 and the cable 8 in the embodiment are both installed on an installation through hole through an installation joint, the installation joint is also called as a cable joint, and specifically, referring to fig. 6, the installation joint comprises a threaded flange 61, a stop washer 62, a sealing ring 63 and a locking nut 64;
one end of the threaded flange 61 is fixed in the mounting through hole, specifically, the threaded flange 61 comprises a first connecting part and a second connecting part, a circle of annular groove is formed in the outer wall of the first connecting part in the circumferential direction, the first connecting part is matched in the mounting through hole, a circle of annular bulge is formed in the inner wall of the mounting through hole, the annular bulge is matched in the annular groove of the first connecting part, so that the first connecting part is locked and fixed in the mounting through hole, the second connecting part is the outer side of the box cover, and threads are formed in the outer peripheral wall of the second connecting part;
an annular clamping groove is formed between the first connecting part and the second connecting part, a stop washer 62 is matched in the annular clamping groove, and the stop washer 62 cannot rotate around the threaded flange 61;
the locking nut 64 comprises a third connecting part and a clamping part along the axial direction, threads are arranged on the inner wall of the third connecting part, the third connecting part is matched with the second connecting part, a limiting part is arranged at one end, away from the third connecting part, of the clamping part, and an accommodating space is formed in the limiting part and the clamping part and used for accommodating the sealing ring 63;
the lead wire 7 in the embodiment is a copper pipe, the copper pipe comprises a flattening part, a thick pipe section and a thin pipe section from a first end to a second end, the flattening part is formed by flattening the first end of the copper pipe, a connecting hole is formed in the flattening part, the diameter of the thick pipe section is larger than that of the thin pipe section, a step surface is formed between the thick pipe section and the thin pipe section, the thin pipe section is matched with the installation joint, after the thin pipe section is matched with the installation joint, the thick pipe section is positioned on the inner side of the box cover 3, the second end of the copper pipe is positioned on the outer side of the box cover 3, and the thick pipe section cannot be matched with the;
when the lead wire 7 is installed, firstly, the thin tube section of the lead wire 7 is inserted into the threaded flange 61, the first end of the lead wire 7 is positioned on the inner side of the box cover 3, the second end of the lead wire 7 is positioned on the outer side of the box cover 3, the sealing ring 63 is sleeved on the lead wire 7 on the outer side of the box cover 3 and is abutted against the second connecting part, then, the locking nut 64 is matched with the threaded flange 61, the sealing ring 63 is positioned in the accommodating space and is abutted against the limiting part, the sealing ring 63 is limited in the accommodating space by the limiting part, in the screwing process of the locking nut 64, the sealing ring 63 is pressed in the radial direction and the axial direction, the sealing ring 63 tightly seals the space between the locking nut 64 and the lead wire 7 to achieve the sealing effect, and finally, the stop washer 62; similarly, if the cable 8 is installed on the box cover 3 through the installation joint, the locking nut 64 and the sealing ring 63 are firstly sleeved on the cable 8, then the cable 8 is inserted into the threaded flange 61, the end part of the cable 8 is located on the inner side of the box cover 3, the locking nut 64 is matched with the threaded flange 61, the sealing ring 63 is pressed in the process of screwing the locking nut 64, the sealing ring 63 tightly seals the locking nut 64 and the cable 8, and finally the stop washer 62 is bent to limit the rotation of the locking nut 64, so that the anti-loosening effect is achieved.
The installation through hole for the cable 8 to pass through can install many cables 8 simultaneously according to specific situation, according to the field usage, the use of cable 8 can be divided into the following 4 kinds of condition:
an SPTYWA23-8 core cable 8;
SPTYWA23-8 core cable 8+ 50mm2A copper wire;
an SPTYWA23-12 core cable 8;
SPTYWA23-12 core cable 8+ 50mm2A copper wire;
therefore, in order to ensure the sealing performance of installing two cables 8, in the present embodiment, two types of sealing rings 63 are designed, one type of sealing ring 63 is provided with one through hole for passing the cable 8, and the other type is provided with two through holes for passing the cable 8, as shown in fig. 7, and the two through holes respectively accommodate the cables 8 with different diameters.
The protection box is used for accommodating two devices, namely an information tuning matching unit PTX device and an air coil XKD device, the information tuning matching unit and the air coil are connected with lead wires 7, the information tuning matching unit is connected with four lead wires 7, and the air coil is only connected with two lead wires 7. Referring to fig. 8, in the prior art, a plane is formed around the installation through hole, the length of the lead wire 7 located on the inner side of the box cover 3 is short, and bending is laborious according to a lever principle, referring to fig. 5 and 6, in this embodiment, a groove is formed by sinking the installation through hole to the outer side of the box cover 3, and the two lead wires 7 are located in the same groove, so that the length of the lead wire 7 located on the inner side of the box cover 3 is prolonged, and according to the lever principle, the force required for bending the lead wire 7 is reduced, compared with fig. 8 and 9, the end of the lead wire 7 is moved by the same distance L, the bending angle of the lead wire 7 in fig. 9 is smaller, and the lead wire 7 is prevented from being broken due to an overla.
Similarly, the circumference of the installation through hole for installing the cable 8 is recessed towards the outer side of the box cover 3 to form a groove, so that the end part of the cable 8 is bent conveniently.
In the prior art, the purpose of facilitating bending of the lead wire 7 is achieved by increasing the length of the lead wire 7 in the box body 1 without arranging a groove, but the end position of the lead wire 7 is changed, the depth of the box body 1 needs to be changed adaptively, and the production cost is increased.
The protection box is outdoor and is irradiated by sunlight for a long time, the outer sides of the box body 1 and the box cover 3 are coated with ultraviolet absorbents, the main components of the absorbents are benzophenone and ethyl hexyl salicylate, harmful ultraviolet rays can be absorbed, damage caused by the ultraviolet rays is reduced, and the service life of the protection box is prolonged.
Although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (8)
1. A protective box for a track circuit is characterized by comprising a box body (1), a sealing ring (2) and a box cover (3);
the opening of the box body (1) is provided with a first annular groove (41), the inner side of the box cover (3) is provided with a pressing part (42), or the opening of the box body (1) is provided with a pressing part (42), and the inner side of the box cover (3) is provided with a first annular groove (41);
the pressing part (42) is provided with a first annular bulge (421);
the sealing ring (2) is matched in the first annular groove (41), and the sealing ring (2) is provided with at least one second annular groove (21) along the length direction;
the box cover (3) is covered on the opening of the box body (1), the pressing part (42) is matched in the first annular groove (41), and the first annular bulge (421) is matched in the second annular groove (21);
the box cover (3) is provided with an installation through hole.
2. A protective box for a track circuit according to claim 1, wherein the sealing ring (2) is provided with at least two second annular protrusions along the length direction, and a second annular groove (21) is formed between any adjacent second annular protrusions.
3. A protective box for track circuits according to claim 1, characterized in that the sealing ring (2) is internally hollow.
4. The protective case for a track circuit according to claim 1, further comprising a bolt (51) and a retainer ring (52);
the sealing ring (2) is provided with a through hole, the limiting ring (52) is coaxially matched in the through hole, and the axial length of the limiting ring (52) is smaller than that of the through hole;
the box body (1) and the box cover (3) are connected through a bolt (51), and the middle part of the bolt (51) is positioned in a limiting ring (52).
5. A protective case for a track circuit according to claim 1, wherein the circumference of the mounting through hole is recessed outward of the case cover (3) to form a groove.
6. A protective case for a track circuit according to any one of claims 1 to 5, characterized in that it further comprises a mounting joint comprising a threaded flange (61), a stop washer (62), a sealing ring (63) and a locking nut (64);
the threaded flange (61) is coaxially fixed in the mounting through hole, the stop washer (62) is matched on the threaded flange (61), the locking nut (64) is matched with the threaded flange (61), the sealing ring (63) is located in an accommodating cavity formed by the locking nut (64) and the threaded flange (61), and the sealing ring (63) abuts against the locking nut (64) and the threaded flange (61).
7. A protective case for a track circuit according to claim 6, wherein the sealing ring (63) is provided with a plurality of through holes having an axis parallel to the axis of the sealing ring (63).
8. A protective case for a track circuit according to any one of claims 1 to 5 and 7, characterized in that the outside of the case body (1) and the outside of the case cover (3) are coated with an ultraviolet absorber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020208148.5U CN211844447U (en) | 2020-02-25 | 2020-02-25 | Protective box for track circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020208148.5U CN211844447U (en) | 2020-02-25 | 2020-02-25 | Protective box for track circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211844447U true CN211844447U (en) | 2020-11-03 |
Family
ID=73248913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020208148.5U Active CN211844447U (en) | 2020-02-25 | 2020-02-25 | Protective box for track circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211844447U (en) |
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2020
- 2020-02-25 CN CN202020208148.5U patent/CN211844447U/en active Active
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