Bidirectional explosion-proof plugging structure

Abstract

The bidirectional explosion-proof plugging structure comprises plugging devices correspondingly arranged at the two ends of a threading hole of a firewall, each plugging device comprises an inner plugging barrel and an outer sealing plate, and a plurality of outer sealing lips are arranged on the outer wall of each inner plugging barrel at intervals; via holes matched with the threading pipes are formed in the outer sealing plates, plugging pieces are detachably installed at the two ends of each threading pipe respectively, and sealing gaskets are arranged on the inner surfaces of the outer sealing plates; an inner sealing lip is arranged on one side, facing the inner plug cylinder, of the outer sealing plate and at the via hole, the inner sealing lip comprises an inward-retracting part and an outward-expanding part, an inner sealing part is formed at the joint of the inward-retracting part and the outward-expanding part, the inner diameter of the sealing part is smaller than the diameter of the via hole, the inward-retracting part is joined with the inner surface of the outer sealing plate, and a guide conical surface is formed on the inner side of the outward-expanding part. The plugging devices are arranged on the two sides of the threading hole respectively, the plugging devices can achieve reliable sealing performance with the threading hole and the threading pipe at the same time, the plugging piece is detachably arranged on the threading pipe, explosion-proof plugging can be enhanced, production safety is improved, the accident occurrence probability is reduced, and losses are effectively reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of electrical protection safety, and in particular relates to a two-way explosion-proof sealing structure. Background Art

[0002] The traditional firewall refers to a non-combustible wall that prevents the spread of fire to adjacent areas and has a fire resistance limit of not less than three hours. It is used to divide fire prevention zones or is an important separating component to prevent the spread of fire between buildings. When cables are passed through the firewall, explosion-proof electrical protection technology is usually required. In the petrochemical hazardous chemical storage and transportation industry, the explosion-proof electrical protection technology includes the sealing of the threading pipes within the explosion-proof area, which is used to isolate the inside and outside of the explosion-proof area. In case of accidents such as leakage and fire, it blocks the electrical contact with combustible gases or fire sources, reducing losses and secondary hazards. In the prior art, most are directly arranging fireproof partition boards on both sides of the threading pipe and filling the threading holes. For example, a fireproof sealing structure of a cable disclosed in Patent CN207893268U adopts the above-mentioned scheme. Such a fireproof sealing structure can, to a certain extent, prevent the fire of the cable from spreading along the threading pipe to the other side of the firewall. However, during actual operation, it is necessary to first pass the threading pipe, then perform the filling treatment, and then fix the fireproof partition boards at both ends of the threading pipe through a number of screws respectively. The operation complexity is relatively high, time-consuming and laborious, and it is difficult to ensure a tight fit between the fireproof partition board and the firewall, and it is also difficult to ensure a tight fit between the filling block and the fireproof partition board. Once the filling block in the threading hole does not fit tightly with the inner wall of the threading hole or there are holes in the filling block itself, the fireproof effect is likely to deteriorate. Therefore, it is necessary to improve the existing fireproof sealing structure. Summary of the Invention

[0003] In view of this, the present invention aims to overcome the defects in the prior art and proposes a two-way explosion-proof sealing structure.

[0004] To achieve the above object, the technical solution of the present invention is realized as follows:

[0005] A two-way explosion-proof sealing structure includes plugging devices arranged correspondingly at both ends of the threading hole of the firewall. The plugging device includes an inner plugging cylinder and an outer sealing plate. A plurality of outer sealing lips are arranged at intervals on the outer wall of the inner plugging cylinder, and each outer sealing lip is inclined towards the side of the outer sealing plate; a through hole matching the threading pipe is provided on the outer sealing plate, and plugging members are detachably installed at both ends of the threading pipe respectively, and a sealing gasket is provided on the inner surface of the outer sealing plate; on the side of the outer sealing plate facing the inner plugging cylinder, an inner sealing lip is provided at the through hole. The inner sealing lip includes a retracted portion and an expanded portion, and an inner sealing portion is formed at the connection of the retracted portion and the expanded portion. The inner diameter of this sealing portion is smaller than the diameter of the through hole. The retracted portion is connected to the inner surface of the outer sealing plate, and a guiding conical surface is formed inside the expanded portion.

[0006] Furthermore, a conical guiding portion is provided at the end of the inner plugging cylinder.

[0007] Further, the plugging member is made of fireproof plugging material.

[0008] Further, the inner plugging cylinder and the outer sealing plate are of an integrally formed structure.

[0009] Further, 2-5 outer sealing lips are provided at intervals on the outer wall of the inner plugging cylinder.

[0010] Further, the outer sealing lip, the inner sealing lip and the sealing gasket are all made of fluororubber.

[0011] Further, the inner diameter of the sealing part is 1-3 mm smaller than the diameter of the through hole.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] The present invention provides plugging devices on both sides of the wire threading hole. The plugging devices can achieve reliable sealing with the wire threading hole and the wire threading pipe at the same time, and a plugging member is detachably provided on the wire threading pipe, which can strengthen the explosion-proof plugging, improve production safety and reduce the probability of accidents. In case of a fire, the fire can be effectively cut off. In case of a leakage accident, the electrical connection with the combustible gas can be blocked, preventing the combustible gas from accumulating in the wire threading pipe or overflowing through the wire threading pipe, avoiding causing greater harm and effectively reducing losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0015] Figure 1 is a schematic structural diagram of the present invention;

[0016] Figure 2 is a schematic diagram of the plugging device in the present invention;

[0017] Figure 3 is a schematic diagram of the inner sealing lip in the plugging device of the present invention;

[0018] Figure 4 is a schematic diagram of the plugging device matching two wire threading pipes in the embodiment of the present invention;

[0019] Figure 5 is Figure 4 a schematic diagram when the plugging device in is applied;

[0020] Figure 6 is a schematic diagram of the plugging device with an inner support in the embodiment of the present invention;

[0021] Figure 7 is Figure 6Schematic diagram of the inner support. Specific implementation mode

[0022] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0023] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the technical features indicated. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0024] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0025] The present invention will be described in detail below with reference to the drawings and in combination with embodiments.

[0026] A two-way explosion-proof plugging structure, as Figures 1 to 7 shown, includes plugging devices 3 arranged corresponding to both ends of the wire passing hole 2 in the firewall 1. The plugging device includes an inner plugging cylinder 4 and an outer sealing plate 5. Several outer sealing lips 6 are arranged at intervals on the outer wall of the inner plugging cylinder, and each outer sealing lip is inclined towards the side of the outer sealing plate; a through hole 8 matching the wire passing pipe 7 (in the wire passing hole) is provided on the outer sealing plate, plugging members 9 are detachably installed at both ends of the wire passing pipe respectively, and a sealing gasket 10 is provided on the inner surface of the outer sealing plate. Usually, the thickness of the sealing gasket is 0.2 - 1.5 mm.

[0027] The outer sealing plate faces the inner plug cylinder side, and an inner sealing lip 11 is provided at the through hole. The inner sealing lip includes a retracted portion 12 and an expanded portion 13. The connection position (inner wall position) between the retracted portion and the expanded portion forms an inner sealing portion 14. The inner diameter of this sealing portion is smaller than the diameter of the through hole. The retracted portion is connected to the inner surface of the outer sealing plate, and a guiding conical surface is formed on the inner side of the expanded portion to facilitate the penetration of the wire conduit.

[0028] To facilitate the installation of the plugging device into the wire passing hole, a conical guiding portion 15 is provided at the end of the inner plug cylinder. The plugging member is made of a fireproof plugging material, such as asbestos rope or fireproof cloth, etc. The fireproof plugging material is used to plug the pipe orifice of the wire conduit, playing a good role in fire and explosion isolation. When it is necessary to thread the cable, the plugging member can be removed and then the threading operation can be carried out.

[0029] Generally, the inner plug cylinder and the outer sealing plate are of an integrally formed structure, which is very convenient for filling operation and ensures the fire and explosion protection performance. 2 - 5 outer sealing lips are provided at intervals on the outer wall of the inner plug cylinder. The outer sealing lip, the inner sealing lip, and the sealing gasket are all made of fluororubber, having excellent fire and high temperature resistance performance. Preferably, the inner diameter of the sealing portion is 1 - 3 mm smaller than the diameter of the through hole, so that the sealing portion can stably fit the outer wall of the wire conduit to achieve good sealing performance.

[0030] It should be noted that the through holes provided on the outer sealing plate match the wire conduits. For example, Figure 2 the plugging device shown is a plugging device matching a single wire conduit, and Figure 4 the plugging device shown is a plugging device matching two wire conduits, and so on. The number of wire conduits just needs to match the through holes on the outer sealing plate, and this will not be elaborated here.

[0031] In an alternative embodiment, as Figure 6 and Figure 7 shown, an inner support 16 is further provided inside the plugging device. The inner support includes several ring-shaped skeletons 17, and a number of cross-connecting frames 18 are arranged along the axial direction of the skeletons on the outer side of the skeletons. Each cross-connecting frame is evenly distributed along the outer circumference direction of the skeletons. The cross-connecting frame includes a cross-bar portion 19 and a vertical rod portion 20. The cross-bar portion is connected to each skeleton at the same time. The vertical rod portion is perpendicular to the axis of the skeleton, and all the vertical rod portions are on the same side of the cross-connecting frame. The inner plug cylinder and the outer sealing plate can be made of rubber material, and the inner plug cylinder and the outer sealing plate can be directly vulcanized to the inner support, and the processing technology is simple. The skeletons are arranged corresponding to the inner plug cylinder, and the vertical rod portions of the cross-connecting frames are arranged corresponding to the outer sealing plate. The inner support can play a role in improving the overall structural strength of the plugging device, making the structure not easily deformed and ensuring good application effects.

[0032] The present invention creates plugging devices on both sides of the wire threading hole. The plugging devices can achieve reliable sealing with both the wire threading hole and the wire conduit at the same time, and a plugging member is detachably provided on the wire conduit, which can strengthen the explosion-proof plugging, improve production safety and reduce the probability of accidents. In case of a fire, it can effectively cut off the fire. In case of a leakage accident, it can block the electrical contact with combustible gases, prevent the accumulation of combustible gases in the wire conduit or the overflow through the wire conduit, avoid causing greater hazards and effectively reduce losses.

[0033] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A two-way explosion-proof plugging structure, characterized in that: It includes pluggers arranged correspondingly at both ends of the threading hole of the firewall, the plugger includes an inner plug tube and an outer sealing plate, the outer wall of the inner plug tube is provided with several outer sealing lips at intervals, and each outer sealing lip is arranged inclined toward one side of the outer sealing plate; a through hole matching the threading tube is provided on the outer sealing plate, and plugging parts are detachably installed at both ends of the threading tube, and a sealing gasket is provided on the inner surface of the outer sealing plate; the outer sealing plate faces the side of the inner plug tube, and an inner sealing lip is provided at the through hole, the inner sealing lip includes an inward-retracted part and an outward-expanded part, and an inner sealing part is formed at the junction of the inward-retracted part and the outward-expanded part, the inner diameter of the sealing part is smaller than the through hole diameter, the inward-retracted part is connected to the inner surface of the outer sealing plate, and a guiding cone is formed on the inner side of the outward-expanded part.

2. A bidirectional explosion-proof plugging structure according to claim 1, characterized in that: A conical guide portion is arranged at the end of the inner plug tube.

3. A bidirectional explosion-proof plugging structure according to claim 1, characterized in that: The blocking piece is made of fireproof blocking material.

4. A bidirectional explosion-proof plugging structure according to claim 1, characterized in that: The inner plug cylinder and the outer sealing plate are an integrally formed structure.

5. A bidirectional explosion-proof plugging structure according to claim 1, characterized in that: The outer wall of the inner plug cylinder is provided with 2-5 outer sealing lips at intervals.

6. A bidirectional explosion-proof plugging structure according to claim 1, characterized in that: The outer sealing lip, inner sealing lip and sealing gasket are all made of fluororubber.

7. A bidirectional explosion-proof plugging structure according to claim 1, characterized in that: The inner diameter of the sealing part is 1-3 mm smaller than the diameter of the via hole.

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