Plug and explosion-proof shell structure
By designing a plug with a waterproof breathable membrane and a fire retardant sheet in the explosion-proof shell structure, the problem that the explosion-proof shell structure in the prior art is difficult to take into account both gas conduction and explosion-proof, and the explosion-proof and breathable effects suitable for various types of products are achieved.
Patent Information
- Application Number
- CN202421652496.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-12
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-07-12
AI Technical Summary
When the existing explosion-proof shell structure is suitable for products that do not require gas conduction, it is difficult to take into account the explosion-proof needs of products that require gas conduction, and there is a risk of explosion-proof.
A plug is designed, using a partition structure, including a waterproof breathable membrane and a fire retardant sheet. By blocking the fire source and achieving gas conduction, it ensures gas communication between the inside and outside of the product while maintaining fire and waterproofing performance.
It is realized that it is suitable for products that require gas conduction without affecting explosion-proof performance, improves the scope of application of plugs, and ensures the fire-proof, waterproof and breathable performance of the product.
Smart Images
Figure CN222954216U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a plug and an explosion-proof shell structure, which is mainly used in the technical field of transmitters. Background Art
[0002] The explosion-proof housing structure in the prior art is composed of a die-cast explosion-proof upper cover 101, a die-cast explosion-proof lower shell 102, an explosion-proof joint 103, a sealing member 104, and a plug 105. The assembly form is as follows: Figure 1 and Figure 2 As shown, this explosion-proof housing structure blocks the place where the inside and outside of the product communicate with each other with a plug 105 or an explosion-proof connector 103 (a wiring harness is threaded inside the explosion-proof connector).
[0003] This explosion-proof structure is generally suitable for products that do not require gas conduction between the inside and outside of the product, such as pressure transmitter products; while for other products that require the internal and external gases of the product to be conducted through silicone tubes (such as micro-differential pressure transmitters and wind speed transmitters), it is necessary to open a gas channel on the plug 105, which will result in explosion-proof risks or non-explosion-proof products.
[0004] To this end, it is necessary to provide a plug that can adapt to various types of products and has an explosion-proof effect, and an explosion-proof shell structure applied to the plug. Summary of the invention
[0005] The purpose of the utility model is to provide a plug and explosion-proof shell structure with better applicability in view of the above-mentioned problems.
[0006] In order to achieve the above object, the utility model is implemented through the following technical solutions:
[0007] A plug comprises: a plug body, having a first port and a second port connected to each other to form an integral through structure; a partition plate, having a first fire barrier plate and a waterproof breathable membrane arranged on the plug body, wherein the first fire barrier plate is arranged close to the first port, and the waterproof breathable membrane is located between the first fire barrier plate and the second port, and is used to block the fire source from moving from the first port to the second port, and at the same time realize gas conduction between the first port and the second port.
[0008] Preferably, the partition further comprises a second fire barrier sheet located between the waterproof breathable membrane and the second port, and the waterproof breathable membrane is sandwiched between the first fire barrier sheet and the second fire barrier sheet.
[0009] Preferably, the plug body has a cavity, a limiting portion located at one end of the cavity, and a through hole penetrating the limiting portion and communicating with the cavity; the first fire barrier sheet is attached to the limiting portion to prevent the fire source from moving from the through hole to one side of the cavity.
[0010] Preferably, the plug further comprises a connector detachably connected to the second port of the plug body, wherein the connector is a hollow cylindrical structure, at least partially embedded in the cavity and against the waterproof breathable membrane, while connecting the cavity with the outside.
[0011] Preferably, the plug body has a cavity, a limiting portion located at one end of the cavity, and a through hole penetrating the limiting portion and communicating with the cavity; the first fire barrier sheet is attached to the limiting portion to prevent the fire source from moving from the through hole to one side of the cavity.
[0012] Preferably, the plug further comprises a connector detachably connected to the second port of the plug body, wherein the connector is a hollow cylindrical structure, at least partially embedded in the cavity and abutting against the second fire barrier plate, while connecting the cavity with the outside.
[0013] Preferably, a circle of convex parts arranged around the through hole is formed on the end surface of the limiting portion facing the partition, and a circle of concave parts is formed on the outer circle of the convex parts; the first fire barrier sheet is attached to the convex parts, and sealant is filled in the cavity formed by the first fire barrier sheet and the concave parts.
[0014] Preferably, a sealant is filled in the gap between the inner wall of the cavity and the edge of the partition.
[0015] Preferably, a connecting pipe communicating with the through hole is formed on the end surface of the limiting portion away from the partition, and a silicone tube is connected to the connecting pipe.
[0016] An explosion-proof shell structure includes an explosion-proof lower shell and an explosion-proof upper cover installed on the explosion-proof lower shell, wherein the explosion-proof lower shell is respectively provided with a left interface and a right interface, and the explosion-proof shell structure also includes a plug, which is provided with two groups and is respectively installed on the left interface and the right interface.
[0017] The beneficial effects of the utility model are:
[0018] When the waterproof and breathable membrane in the plug is used in combination with the first fire barrier plate and / or the second fire barrier plate, it can ensure that the protected area has good waterproof and breathable properties while achieving internal fire safety protection of the product, so that the interior of the product is connected to the external atmosphere, thereby achieving the purpose of explosion-proof and breathable; thereby, the plug can be suitable for products that do not require gas conduction inside and outside the product, such as pressure transmitter products; it can also be suitable for products that require gas conduction inside and outside the product, such as micro-differential pressure transmitters and wind speed transmitters, thereby increasing the scope of application of the plug. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 The structure of the explosion-proof housing in the prior art is shown in FIG. Figure 1 .
[0020] Figure 2 The structure of the explosion-proof housing in the prior art is shown in FIG. Figure 2 .
[0021] Figure 3 It is a cross-sectional schematic diagram of the plug of the utility model.
[0022] Figure 4 It is an exploded view of the plug of the utility model.
[0023] Figure 5 It is a structural schematic diagram of the plug body and the silicone tube of the utility model.
[0024] Figure 6 It is a three-dimensional structural schematic diagram of the explosion-proof shell structure of the utility model.
[0025] Figure 7 This is an exploded view of the explosion-proof housing structure of the utility model.
[0026] Figure 8 It is a schematic diagram of the assembly of the explosion-proof lower shell and the silicone tube of the utility model.
[0027] Fig. 9 It is a top view of the explosion-proof housing structure of the utility model.
[0028] Fig.10 It is a schematic diagram of the assembly of the plug and the explosion-proof lower shell of the utility model.
[0029] Fig.11 It is a schematic diagram of the assembly of the local structure of the plug of the utility model.
[0030] In the figure, 101-die-cast explosion-proof upper cover; 102-die-cast explosion-proof lower shell; 103-explosion-proof joint; 104-seal; 105-plug; 1-plug body; 11-cavity; 12-limiting part; 13-through hole; 14-convex part; 15-concave part; 16-connecting pipe; 17-sealant; 2-partition; 21-first fire barrier; 22-waterproof breathable membrane; 23-second fire barrier; 3-joint; 4-silicone tube; 5-explosion-proof upper cover; 6-explosion-proof lower shell; 61-left interface; 62-right interface; 8-sealing ring. DETAILED DESCRIPTION
[0031] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the following will be described clearly and completely in combination with the technical solution in the embodiments of the utility model. Obviously, the described embodiments are partial embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.
[0032] The technical solutions provided by various embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.
[0033] refer to Figures 3 to 11 As shown, the utility model provides a plug, comprising: a plug body 1 and a partition plate 2.
[0034] The plug body 1 has a first port and a second port that are interconnected to form an integral through structure, that is, to form an air flow channel; in some practical applications, the plug body 1 has a cavity 11, a stopper 12 located at one end of the cavity 11, and a through hole 13 (such as Figure 3-Figure 5 as shown); Figure 3 As shown, the first port is located on the left and the second port is located on the right.
[0035] like Figure 3 and Figure 4 As shown, the partition 2 is mainly made of fireproof and breathable material, and has a first fire barrier sheet 21 and a waterproof breathable membrane 22 arranged on the plug body 1, wherein the first fire barrier sheet 21 is arranged close to the first port, and the waterproof breathable membrane 22 is located between the first fire barrier sheet 21 and the second port, and is used to block the fire source from moving from the first port to the second port, and at the same time realize gas conduction between the first port and the second port; in some practical applications, the first fire barrier sheet 21 is attached to the limiting portion 12, and blocks the fire source from moving from the through hole 13 to one side of the cavity 11, so as to block the fire source from moving from the first port to the second port.
[0036] The fire barrier sheet (equivalent to the first fire barrier sheet 21) is mainly used to effectively prevent the spread of fire, to avoid the risk of the fire source spreading from the first port to the second port as much as possible, to play the role of fire separation, and to improve the explosion-proof performance of the product or equipment used by the plug. In actual application, the commonly used fire barrier sheet is a stainless steel sintered mesh.
[0037] The waterproof breathable membrane 22 can maintain the product or equipment used by the plug with good waterproof performance, prevent moisture intrusion, and allow the internal core to communicate with the external atmosphere. In this way, the plug of this embodiment can not only be applied to products that do not require gas conduction between the inside and outside of the product, such as pressure transmitter products; it can also be applied to products that require gas conduction between the inside and outside of the product, such as micro-differential pressure transmitters and wind speed transmitters. When the waterproof breathable membrane 22 and the first fire barrier 21 are used in combination, it can ensure that the protected area has good waterproof and breathable performance while achieving fire safety, so that the inside of the product is connected to the external atmosphere, and the first fire barrier 21 is set on the side close to the first port, mainly to prevent the fire source from directly contacting the waterproof breathable membrane 22 and causing damage to it.
[0038] In some practical applications:
[0039] refer to Figure 3 and Figure 4The partition 2 may also have a second fire barrier sheet 23 located between the waterproof breathable membrane 22 and the second port, that is, the partition 2 has two fire barrier sheets, namely the first fire barrier sheet 21 and the second fire barrier sheet 23, and the waterproof breathable membrane 22 is sandwiched between the first fire barrier sheet 21 and the second fire barrier sheet 23; such a structure, when there is a fire source inside the product or equipment to which the plug is applied, the fire source is blocked inside the product or equipment by the double-layer fire barrier sheet and the middle waterproof breathable membrane 22 structure, so that the fire source cannot be conducted with the external gas, thereby achieving the purpose of explosion isolation and at the same time achieving the purpose of conducting the external gas with the inside of the product or equipment.
[0040] Based on the above different implementations, the plug further comprises a connector 3 detachably connected to the second port of the plug body 1, and the connector 3 is a hollow cylindrical structure;
[0041] When the partition 2 in the plug has only one fire barrier (ie, the first fire barrier 21 ), at least a portion of the connector 3 is embedded in the cavity 11 and abuts against the waterproof breathable membrane 22 , while connecting the cavity 11 with the outside.
[0042] When the partition 2 in the plug has two fire-blocking plates (i.e., including both the first fire-blocking plate 21 and the second fire-blocking plate 23), at least part of the connector 3 is embedded in the cavity 11 and abuts against the second fire-blocking plate 23, while connecting the cavity 11 with the outside.
[0043] In actual application of the detachable connection between the plug body 1 and the connector 3, an internal thread is provided on the inner wall of the cavity 11 of the plug body 1, and a portion of the connector 3 embedded in the cavity 11 is provided with an external thread matching therewith, thereby achieving a detachable connection between the two by means of a threaded connection.
[0044] In this embodiment, the plug body 1 and the joint 3 are two detachably connected components, which facilitate the installation of the partition 2 (i.e., the fire barrier and / or the waterproof breathable membrane 22), and the pressure at the end of the joint 3 can ensure that the partition 2 structure can be tightly attached to the limiting portion 12, thereby preventing the fire source from overflowing and spreading from the gap between the partition 2 structure and the limiting portion 12.
[0045] like Figure 3 , Fig.10 and Fig.11 As shown, in other practical applications, in order to improve the fire-blocking performance, a circle of convex parts 14 arranged around the through hole 13 is formed on the end surface of the limiting part 12 facing the partition 2, and a circle of concave parts 15 are formed on the outer circle of the convex part 14; the first fire-blocking sheet 21 is attached to the convex part 14, and a sealant 17 ( Fig.10 The blue part at the middle limit portion 12 is the schematic position of the sealant).
[0046] In actual operation, before the partition 2 structure and the joint 3 are installed, sealant is pre-filled into the recess 15, and then the first fire barrier sheet 21, the waterproof breathable membrane 22, and the second fire barrier sheet 23 are placed in the cavity 11 in sequence and against the convex portion 14, and then sealant is poured into the gap between the outer edge of the partition 2 and the cavity 11, so that the glue fills the cavity formed between the first fire barrier sheet 21 and the recess 15 and the gap between the outer edge of the partition 2 and the cavity 11, thereby achieving a stable and firm assembly of the partition 2 as a whole. At the same time, this glue pouring method can also ensure the sealing performance between the partition 2 structure and the limiting portion 12, further improving the fire barrier performance of the partition 2 structure.
[0047] In some practical applications, a connecting pipe 16 connected to the through hole 13 is formed on the end surface of the limiting portion 12 away from the partition 2, and a silicone tube 4 is connected to the connecting pipe. The other end of the silicone tube can be extended into the interior of a micro-differential pressure transmitter product or a wind speed transmitter product to achieve gas conduction between the external atmosphere and the internal core of the product.
[0048] In other practical applications:
[0049] The plug is applied to the explosion-proof housing structure of micro differential pressure transmitter products or wind speed transmitter products, such as Figures 6 to 10 As shown, the explosion-proof housing structure includes an explosion-proof lower shell 6 and an explosion-proof upper cover 5 installed on the explosion-proof lower shell 6. The explosion-proof lower shell 6 is respectively provided with a left interface 61 and a right interface 62. Since micro-differential pressure transmitter products or wind speed transmitter products need to conduct the external gas of the product with the core gas inside the product, in order to achieve explosion-proof and ensure the safety and stability of the product under normal working conditions, it is necessary to use the plug, which is provided with two groups and is respectively installed on the left interface 61 and the right interface 62. In order to improve the product accuracy, a connecting pipe 16 connected to the through hole 13 is also formed on the end face of the limiting portion 12 away from the partition 2. The connecting pipe 16 is connected with a silicone tube 4. The end of the silicone tube 4 is placed inside the product and arranged opposite to the core to achieve air conduction inside and outside the product. At the same time, under the combined action of the two fire-blocking sheets and the waterproof and breathable membrane, the internal explosion-proof, waterproof, and breathable purposes of the product can also be achieved.
[0050] It should be noted that a sealing ring 8 (such as Fig.10 , Fig.11 ), to ensure that when the plug is connected to the corresponding left interface 61 or right interface 62, the sealing ring 8 can seal the gap between the connecting surfaces of the two by deformation, thereby ensuring the sealing between the two.
[0051] In the above description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed above.
[0052] In the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model.
Claims
1. A plug, characterized in that: include: The plug body (1) has a first port and a second port that are interconnected to form an integral through structure; The partition plate (2) comprises a first fire barrier sheet (21) and a waterproof breathable membrane (22) arranged on the plug body (1), wherein the first fire barrier sheet (21) is arranged close to the first port, and the waterproof breathable membrane (22) is located between the first fire barrier sheet (21) and the second port, and is used to prevent the fire source from moving from the first port to the second port, while achieving gas conduction between the first port and the second port.
2. The plug according to claim 1, characterized in that: The partition plate (2) further comprises a second fire barrier sheet (23) located between the waterproof breathable membrane (22) and the second port, and the waterproof breathable membrane (22) is sandwiched between the first fire barrier sheet (21) and the second fire barrier sheet (23).
3. The plug according to claim 1, characterized in that: The plug body (1) comprises a cavity (11), a limiting portion (12) located at one end of the cavity (11), and a through hole (13) penetrating the limiting portion (12) and communicating with the cavity (11); the first fire barrier sheet (21) is attached to the limiting portion (12) to prevent a fire source from moving from the through hole (13) to one side of the cavity (11).
4. The plug according to claim 3, characterized in that: The plug further comprises a connector (3) detachably connected to the second port of the plug body (1); the connector (3) is a hollow cylindrical structure, at least partially embedded in the cavity (11) and abutting against the waterproof breathable membrane (22), while connecting the cavity (11) with the outside.
5. The plug according to claim 2, characterized in that: The plug body (1) comprises a cavity (11), a limiting portion (12) located at one end of the cavity (11), and a through hole (13) penetrating the limiting portion (12) and communicating with the cavity (11); the first fire barrier sheet (21) is attached to the limiting portion (12) to prevent a fire source from moving from the through hole (13) to one side of the cavity (11).
6. The plug according to claim 5, characterized in that: The plug further comprises a connector (3) detachably connected to the second port of the plug body (1); the connector (3) is a hollow cylindrical structure, at least partially embedded in the cavity (11) and abutting against the second fire barrier (23), while connecting the cavity (11) with the outside.
7. The plug according to claim 3 or 5, characterized in that: A circle of protrusions (14) arranged around the through hole (13) is formed on the end surface of the limiting portion (12) facing the partition (2), and a circle of recesses (15) is formed on the outer circle of the protrusions; the first fire barrier sheet (21) is attached to the protrusions (14), and a sealing compound is filled in the cavity formed by the first fire barrier sheet (21) and the recesses (15).
8. The plug according to claim 3 or 5, characterized in that: The gap between the inner wall of the cavity (11) and the edge of the partition (2) is filled with sealant.
9. The plug according to claim 3 or 5, characterized in that: A connecting pipe (16) communicating with the through hole (13) is formed on the end surface of the limiting portion (12) away from the partition (2), and a silicone tube (4) is connected to the connecting pipe.
10. An explosion-proof housing structure, comprising an explosion-proof lower housing (6), an explosion-proof upper cover (5) mounted on the explosion-proof lower housing (6), the explosion-proof lower housing (6) being provided with a left interface (61) and a right interface (62), characterized in that: The explosion-proof housing structure further comprises a plug as claimed in any one of claims 1 to 9, wherein two groups of plugs are provided and are respectively installed on the left interface (61) and the right interface (62).