Explosion-proof meter case with outer lead

Abstract

The utility model provides an explosion-proof meter case with an outer lead, which is more convenient for sealing and glue filling of the outer lead, enables the sealing performance of the outer lead to be better, and is not easy to lose efficacy in the use process, and relates to the technical field of explosion-proof meter design. An explosion-proof meter case with an outer lead comprises a panel, the outer lead and a concave bottom case. The inner wall of the concave bottom shell is provided with a wire passing cavity with an opening in the upper end, and the opening of the wire passing cavity is provided with a cover plate capable of being opened and closed. A partition plate which divides the wire passing cavity into an upper cavity and a lower cavity which are arranged up and down is arranged in the wire passing cavity, the upper cavity is provided with a wire inlet hole, one end of the wire inlet hole is communicated with the upper cavity, the other end of the wire inlet hole is communicated with an inner cavity of the explosion-proof meter shell, and a wire outlet hole is formed in the inner wall of the concave bottom shell; the outer lead wire sequentially passes through the wire inlet hole, the upper cavity, the partition plate, the lower cavity and the wire outlet hole and extends out of the inner cavity of the explosion-proof meter shell, the upper cavity is filled with sealant, and the outer lead wire is provided with a bent structure in the lower cavity.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of explosion -proof meter design, specifically is a kind of explosion -proof meter shell with external lead wire. BACKGROUND

[0002] In some high-risk industries, such as petroleum refining, natural gas pipeline, coal mine, pharmaceutical workshop, dust environment, need to use, such as explosion -proof pressure gauge, explosion -proof pressure difference gauge and other explosion -proof meter. Explosion -proof meter shell cavity needs to meet the sealing requirement, to prevent internal failure from expanding.

[0003] In order to facilitate the adjustment of explosion -proof meter parameter, set up explosion -proof meter etc., present some explosion -proof meter shell outside is provided with touch button, this needs to set up external lead wire in shell cavity, to introduce the electric signal generated by touch button into the circuit board in meter shell cavity. In order to facilitate the lead-out of external lead wire, present conventional method is to drill integral type wire hole with the outer diameter of external lead wire on the bottom shell of meter shell, then the external lead wire is pulled out from the wire hole, and then the glue is filled in the wire hole for sealing. However, since the external lead wire generally includes multiple wires, the applicant found in use that the existing structure is inconvenient to fill the glue, and it is relatively difficult to fully fill the glue, resulting in poor sealing of the external lead wire, and the sealing of the external lead wire is easy to fail in use, which needs to be improved. UTILITY MODEL CONTENT

[0004] The technical problem to be solved by the utility model is to provide an explosion -proof meter shell with external lead wire, which is more convenient to seal and fill the external lead wire, and can make the sealing performance of the external lead wire better and not easy to fail in use.

[0005] The utility model adopts the technical scheme that an explosion -proof meter shell with external lead wire comprises a panel, an external lead wire and a concave bottom shell, the panel seal cover is arranged on the concave bottom shell to form the explosion -proof meter shell with internal cavity sealing.

[0006] An upper end opening wire passing cavity is arranged on the inner wall of the concave bottom shell, and a cover plate that can be opened and closed is arranged at the opening of the wire passing cavity.

[0007] A partition plate is arranged in the wire passing cavity, which divides the wire passing cavity into an upper cavity and a lower cavity arranged above and below, a wire inlet hole is arranged on the upper cavity, one end of which is communicated with the upper cavity, and the other end is communicated with the internal cavity of the explosion -proof meter shell, and a wire outlet hole is arranged in the inner wall of the concave bottom shell, one end of which extends into the lower cavity, and the other end is communicated with the outer side of the concave bottom shell.

[0008] The external lead wire extends to the internal cavity of the explosion -proof meter shell through the wire inlet hole, the upper cavity, the partition plate, the lower cavity and the wire outlet hole in sequence, the upper cavity is filled with sealant, and the external lead wire is provided with a bending structure in the lower cavity.

[0009] Further, the lower cavity is filled with a compressed compressible material layer, and the partition plate is supported by the compressible material layer and arranged in the wire passing cavity.

[0010] Further, the compressible material layer is a sponge.

[0011] Further, a sealing ring is arranged on the outer lead wire and sealingly cooperates with the wire outlet hole.

[0012] Further, the concave bottom shell is further provided with a wire connection cavity communicating with the inner cavity of the concave bottom shell, the wire connection cavity forms a closed structure through a wire connection plate arranged at one end of the wire connection cavity and communicating with the inner cavity of the concave bottom shell, the wire connection plate is provided with a wire connection terminal on the side facing the wire connection cavity, and the outer side of the wire connection cavity is further provided with a cable waterproof joint.

[0013] Further, a signal output wire is further arranged in the cable waterproof joint and sealingly cooperates with the cable waterproof joint, and the inner end of the signal output wire is connected with the wire connection terminal.

[0014] The explosion-proof watch case with an outer lead wire has the following advantages: the wire passing cavity with an open upper end is arranged on the inner wall of the concave bottom shell, the opening of the wire passing cavity is provided with an openable cover plate, the outer lead wire extends to the inner cavity of the explosion-proof watch case through the wire inlet hole, the upper cavity, the partition plate, the lower cavity and the wire outlet hole in sequence, the cover plate can be opened when filling the upper cavity with glue, the filling of the glue is more convenient, the glue filled in the space between the wires of the outer lead wire is more sufficient, the sealing performance of the outer lead wire is better, and the outer lead wire is not prone to failure in use, the outer lead wire is provided with a bending structure in the lower cavity, the wires are conveniently elongated or shortened within a certain range, the sealing structure in the upper cavity is not affected when the wires are elongated or shortened in use, and the sealing failure of the outer lead wire in use is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a schematic view of the explosion-proof watch case structure of the utility model;

[0016] Figure 2 is a schematic view of the concave bottom shell structure of the utility model;

[0017] Figure 3 is a schematic view of the arrangement of the sealing ring;

[0018] As shown in the figure: the outer lead 2, the cable waterproof joint 3, the wiring cavity 4, the sealing rubber ring 5, the signal output line 6, the concave bottom shell 11, the panel 12, the inner cavity 13, the wire passing cavity 14, the cover plate 15, the partition plate 16, the sealing glue 17, the wire hole 18, the layer of compressible material 19, the wiring board 41, the wiring terminal 42, the upper cavity 141, the lower cavity 142, the wire inlet hole 143, the sealing ring 181. DETAILED DESCRIPTION

[0019] The utility model is further explained below in combination with the drawings and examples.

[0020] As Figures 1 to 2 shown, a kind of explosion-proof watchcase 1 of the outer lead of the utility model, including panel 12, outer lead 2 and concave bottom shell 11, the panel 12 is connected on the concave bottom shell 11 by bolt or screw cover, and panel 12 is sealed with the concave bottom shell 11 by sealing rubber ring 5, so as to sealing cover is arranged on the concave bottom shell 11, and the explosion-proof watchcase of inner cavity 13 sealing is formed.In some embodiments, panel 12 is also sealed cover is arranged on the concave bottom shell 11 by bonding way.Panels 12 adopt transparent material, and the inner cavity 13 of explosion-proof watchcase is used to install the electronic components, circuit board etc.of explosion-proof watch.The outer lead sealing glue is more convenient, and the outer lead sealing performance can be better, and the utility model has the following improvements: the inner wall of the concave bottom shell 11 is equipped with the wire passing cavity 14 of upper end opening, the opening of the wire passing cavity 14 is equipped with the cover plate 15 that can be opened and closed, and cover plate 15 is generally connected with wire passing cavity 14 by screw, to realize openable and closable;The wire passing cavity 14 is equipped with the partition plate 16 that the wire passing cavity 14 is divided into upper cavity 141 and lower cavity 142 arranged above and below, the upper cavity 141 is equipped with wire inlet hole 143, one end is communicated with upper cavity 141, and the other end is communicated with the inner cavity of the explosion-proof watchcase, the inner wall of the concave bottom shell 11 is equipped with wire hole 18, one end extends into the lower cavity 142, and the other end is communicated with the outside of the concave bottom shell 11;The outer lead 2 extends to the inner cavity of the explosion-proof watchcase in sequence through wire inlet hole 143, upper cavity 141, partition plate 16, lower cavity 142 and wire hole 18, the sealing glue 17 is filled in the upper cavity 141, and the outer lead 2 is equipped with bending structure in the lower cavity 142.

[0021] The utility model discloses an explosion -proof watch case sets up the wire through cavity 14 of the upper end opening on the inner wall of concave bottom shell 11, the wire through cavity 14's opening is equipped with the cover 15 that can open and close, the outer lead 2 is in turn through the wire hole 143, upper cavity 141, baffle 16, lower cavity 142, wire hole 18 and extends to the inner chamber of explosion -proof watch case outside, so, when filling glue to upper cavity 141, can open the cover and fill glue, and filling glue is more convenient, and the glue filling in the wire interval between outer lead 2 is filled more conveniently, can make the wire gap and fill glue more fully, thus can make outer lead sealing performance better, and not easy to fail in the use process.

[0022] The cover 15 can be arranged in the wire through cavity 14 by being connected with the side wall of the wire through cavity 14, such as welding, integral structure, etc. Figure 1 As shown in the utility model embodiment, the lower cavity 142 is filled with a compressed compressible material layer 19, and the baffle 16 is supported by the compressible material layer 19 and arranged in the wire through cavity 14. The above structure can take out the sealant 17 and the baffle from the wire through cavity 14 at the same time, which is more convenient for taking out the sealant 17 from the upper cavity 141, thereby facilitating replacement of the outer lead 2 when it is damaged. In addition, the compressible material layer 19 can recover a certain deformation after the outer lead 2 is pulled out within a certain range, thereby filling the space left after the outer lead 2 is pulled out. The compressible material layer 19 cooperates with the wire and the lower cavity, which is also conducive to further improving the sealing effect of the lead-out wire. When the outer lead 2 needs to be shortened, the outer lead 2 can also compress the compressible material layer 19 to enter the lower cavity, without affecting the elongation and shortening of the outer lead 2. The compressible material layer 19 can be made of a porous material, such as sponge.

[0023] As shown in the utility model embodiment, Figure 3 Further, the outer lead 2 is sleeved with a sealing ring 181 that sealingly cooperates with the wire hole 18, to further improve the sealing effect of the outer lead.

[0024] The explosion -proof watch usually needs to output measurement signals outward during use. In order to output measurement signals outward, while ensuring the sealing of the inner chamber of the shell, as shown in the utility model embodiment, Figure 1 and Figure 2As shown, the utility model discloses the concave bottom shell 11 still be equipped with one end with its inner chamber intercommunication's wiring cavity 4, the wiring cavity 4 is formed closed structure through the plugging of the wiring board 41 of one end with the inner chamber intercommunication of concave bottom shell 11, and the wiring board 41 is used for external signal line, to export the measuring signal of anti -explosion meter to other equipment, the one side of wiring board 41 towards the wiring cavity 4 is equipped with wiring terminal 42, the outside of wiring cavity 4 still has cable waterproof joint 3. Wiring terminal 42 can adopt the existing ordinary wiring terminal, also can adopt the existing plug -in wiring terminal 42, to facilitate the connection signal output line 6. Cable waterproof joint 3 adopts the existing cable waterproof joint, and specifically can see like CN200720054823.8, CN201720149279.9 etc. the cable waterproof joint of disclosure. The above-mentioned structure guarantees the sealing property of concave bottom shell 11 inner chamber through wiring board 41, and after signal output line 6 installation, signal output line can be clamped tightly by cable waterproof joint, to form double -layer sealing structure, so that the gas or liquid in the table is difficult to leak out through wiring cavity 4.

[0025] The utility model discloses the cable waterproof joint 3 in the signal output line 6 of being equipped with in the anti -explosion meter shell and with the sealed cooperation of cable waterproof joint 3, the inner end of signal output line 6 is connected with wiring terminal 42. Of course, signal output line 6 can also be equipped by user.

Claims

1. An explosion-proof watch case with an external lead, comprising a faceplate (12), an external lead (2) and a concave bottom case (11), the faceplate (12) being sealedly capped on the concave bottom case (11) to form the explosion-proof watch case with an inner cavity, characterized in that: an upper-end-opened lead-through cavity (14) is arranged on the inner wall of the concave bottom case (11), and a cover plate (15) is arranged at the opening of the lead-through cavity (14) and can be opened and closed; a partition plate (16) is arranged in the lead-through cavity (14) to divide the lead-through cavity (14) into an upper cavity (141) and a lower cavity (142) arranged in a vertical manner; the upper cavity (141) is provided with a lead-in hole (143) in communication with the upper cavity (141) at one end and with the inner cavity of the explosion-proof watch case at the other end; the inner wall of the concave bottom case (11) is provided with a lead-out hole (18) in communication with the outside of the concave bottom case (11) at one end and extending into the lower cavity (142) at the other end; the external lead (2) extends to the inner cavity of the explosion-proof watch case through the lead-in hole (143), the upper cavity (141), the partition plate (16), the lower cavity (142) and the lead-out hole (18) in sequence, the upper cavity (141) is filled with sealing glue (17), and the external lead (2) is provided with a bending structure in the lower cavity (142). The lower cavity (142) is filled with a compressed compressible material layer (19), and the partition plate (16) is supported by the compressible material layer (19) and arranged in the lead-through cavity (14). The compressible material layer (19) is a sponge. A sealing ring (181) is sleeved on the external lead (2) and sealingly matches the lead-out hole (18).

2. A flameproof case with an external lead as claimed in claim 1, characterized in that: The concave bottom case (11) is further provided with a lead connection cavity (4) in communication with the inner cavity thereof at one end, the lead connection cavity (4) forms a closed structure through a lead connection plate (41) sealingly arranged at the one end thereof in communication with the inner cavity of the concave bottom case (11), the lead connection plate (41) is provided with a lead terminal (42) on the side facing the lead connection cavity (4), and the outer side of the lead connection cavity (4) is further provided with a cable waterproof joint (3).

3. A flameproof case with an external lead as claimed in claim 2, characterized in that: A signal output lead (6) is further arranged in the cable waterproof joint (3) and sealingly matches the cable waterproof joint (3), and the inner end of the signal output lead (6) is connected with the lead terminal (42).

4. A flameproof case with an external lead as claimed in claim 1, characterized in that: ​ 5. A flameproof case with an external lead as claimed in claim 1, characterized in that: ​ 6. A flameproof case with an external lead as claimed in claim 5, characterized in that: ​

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