An explosion-proof isolation sealed box

Abstract

The utility model discloses a kind of explosion-proof isolation sealing box, including main sealing box and secondary sealing box, secondary sealing box is fixedly connected in main sealing box one side, T-shaped plug is inserted in the free end of secondary sealing box, the position of the inner part of secondary sealing box close to its open end is fixedly connected with positioning boss, inner cavity is set in the plug, and elastic positioning rod is arranged around the inner cavity along the central axis of plug, the free end of the elastic positioning rod passes through plug and is connected with positioning boss. In the utility model, the linkage cooperation between plug and secondary sealing box is through ball head rod, compression spring, positioning column and cone body, realize quick plug and fasten locking function, avoid the problem that sealing mortar penetrates in traditional thread connection and affects disassembly and sealing performance.

Description

Technical Field

[0001] This utility model relates to the field of explosion-proof isolation sealing box technology, and in particular to an explosion-proof isolation sealing box. Background Technology

[0002] Explosion-proof isolation sealing boxes are mainly used to seal and isolate the joints of electrical circuits in explosive gas environments to prevent flammable gases or vapors from entering the electrical system, thereby ensuring the safe operation of electrical equipment.

[0003] However, in most commonly available explosion-proof isolation boxes, the connection between the plug and the secondary sealing box body is usually achieved through a threaded connection. During use, operators need to inject sealing putty through the opening at the top of the box body, which is often also the location where the plug is installed. Due to the high fluidity of the putty, it easily seeps into the threaded connection between the plug and the box body during injection and remains in the thread gap after curing. This leads to the following drawbacks: Firstly, the cured putty makes plug removal difficult, affecting the efficiency of later maintenance and replacement; secondly, the volume change of the cured putty may cause the threaded connection to loosen, reducing sealing performance and causing a decrease in explosion-proof performance, posing a certain safety hazard. Utility Model Content

[0004] The purpose of this utility model is to provide an explosion-proof isolation and sealing box in order to solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An explosion-proof isolation sealing box includes a main sealing box and a secondary sealing box. The secondary sealing box is fixedly connected to one side of the main sealing box. A T-shaped plug is inserted into the free end of the secondary sealing box. A positioning boss is fixedly connected inside the secondary sealing box near its opening end. An inner cavity is opened on the plug. An elastic positioning rod is arranged around the central axis of the plug in the inner cavity. The free end of the elastic positioning rod passes through the plug and connects to the positioning boss.

[0007] As a further description of the above technical solution:

[0008] The elastic positioning rod includes a ball head rod and a compression spring sleeved on the rod. The free end of the ball head rod passes through the plug, and the two ends of the compression spring are fixedly connected to the ball head of the ball head rod and the cavity wall of the inner cavity, respectively.

[0009] As a further description of the above technical solution:

[0010] The plug is fixedly fitted with a limiting ring that contacts the positioning boss, and a number of positioning pins passing through the positioning boss are fixedly connected to the limiting ring.

[0011] As a further description of the above technical solution:

[0012] Along the radial direction of the positioning boss, the positioning post and the positioning boss are respectively provided with a first positioning hole and a second positioning hole to accommodate the free end of the ball head rod.

[0013] As a further description of the above technical solution:

[0014] The plug is connected to a screw rod by a threaded connection, and the free end of the screw rod is fixedly connected to a frustum tangent to the ball head of the ball head rod.

[0015] As a further description of the above technical solution:

[0016] A sealing ring is provided between the plug and the secondary sealing box.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0018] 1. In this utility model, the rotating screw pushes the truncated cone body inward, and the ball head rod is pushed and gradually squeezed so that the free end of the ball head rod passes through the second positioning hole and is inserted into the first positioning hole, locking the plug and enhancing the connection stability between the plug and the secondary sealing box. At this time, the sealing ring is compressed and tightly fits between the plug and the secondary sealing box, forming a reliable airtightness and explosion-proof sealing effect. Since the plug and the secondary sealing box are non-threaded sealing structures, the risk of putty seeping into the connection part is effectively avoided.

[0019] 2. In this utility model, a sealing ring is provided between the plug and the secondary sealing box. After the plug is fully locked, the sealing ring is compressed and tightly fits between the plug and the secondary sealing box, forming a reliable airtightness and explosion-proof sealing effect. Attached Figure Description

[0020] Figure 1 A three-dimensional structural schematic diagram of an explosion-proof isolation sealing box according to an embodiment of the present utility model is shown;

[0021] Figure 2 A top view schematic diagram of an explosion-proof isolation sealing box according to an embodiment of the present utility model is shown;

[0022] Figure 3 It shows Figure 2 Schematic sectional view along the middle AA direction;

[0023] Figure 4 It shows Figure 3 Enlarged diagram of point A in the middle.

[0024] Legend:

[0025] 1. Main sealing box; 2. Secondary sealing box; 3. Plug; 301. Inner cavity; 4. Screw; 41. Frustum body; 5. Sealing ring; 6. Ball head rod; 7. Compression spring; 8. Limiting ring; 9. Positioning pin; 901. First positioning hole; 10. Positioning boss; 1001. Second positioning hole. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-4 This utility model provides a technical solution: an explosion-proof isolation sealing box, including a main sealing box 1 and a secondary sealing box 2. The secondary sealing box 2 is fixedly connected to one side of the main sealing box 1 and is used to introduce or lead out electrical lines. A T-shaped plug 3 is inserted into the free end of the secondary sealing box 2, and a sealing ring 5 is arranged between the plug 3 and the secondary sealing box 2 to ensure good sealing performance.

[0028] Specifically, such as Figure 4 As shown, a positioning boss 10 is fixedly connected inside the secondary sealing box 2 near its opening end. An inner cavity 301 is formed on the plug 3. A ball-head rod 6 and a compression spring 7 sleeved on the rod are arranged around the central axis of the plug 3 within the inner cavity 301. The two ends of the compression spring 7 are fixedly connected to the ball head of the ball-head rod 6 and the cavity wall of the inner cavity 301, respectively. A limiting ring 8 is fixedly sleeved on the plug 3, contacting the positioning boss 10. Several positioning pins 9 passing through the positioning boss 10 are fixedly connected to the limiting ring 8. The limiting ring 8 contacts the positioning boss 10, and the positioning pins 9 pass through the second positioning hole 1001, providing initial positioning. Along the positioning boss 10... In the radial direction, the positioning post 9 and the positioning boss 10 are respectively provided with a first positioning hole 901 and a second positioning hole 1001 to accommodate the free end of the ball head rod 6. The plug 3 is connected to the screw rod 4 by a threaded connection. The free end of the screw rod 4 is fixedly connected to a frustum 41 tangent to the ball head of the ball head rod 6. Rotating the screw rod 4 pushes the frustum 41 forward, and the ball head rod is pushed through the second positioning hole 1001 and into the first positioning hole 901, locking the plug 3 and the positioning boss 10. This replaces the traditional threaded tightening method of directly connecting the plug to the secondary sealing box, avoids the sealant from seeping into the key connection parts, prevents it from affecting disassembly after curing, and improves the efficiency of installation and disassembly.

[0029] Working principle: In use, firstly, putty is injected into the main sealing box 1 through the opening of the secondary sealing box 2 to protect the internal electrical connectors. Secondly, the plug 3 is inserted along the opening direction of the secondary sealing box 2, and the limiting ring 8 contacts the positioning boss 10. At the same time, the positioning pin 9 passes through the second positioning hole 1001, which plays a preliminary positioning role. Next, the rotating screw 4 pushes the frustum 41 inward. The ball joint 6 is pushed and gradually squeezed, and the free end of the ball joint 6 passes through the second positioning hole 1001 and is inserted into the first positioning hole 901, locking the plug 3 and enhancing the connection stability between the plug and the secondary sealing box. At this point, the sealing ring 5 is compressed and tightly fits between the plug 3 and the secondary sealing box 2, forming a reliable airtight and explosion-proof sealing effect. Since the plug 3 and the secondary sealing box 2 have a non-threaded sealing structure, the risk of putty seeping into the connection part is effectively avoided. When disassembling, rotate the screw 4 in the opposite direction to make the truncated cone 41 exit the working area of ​​the ball head rod 6, the compression spring 7 returns to its original state, pushes the ball head rod 6 to reset, and releases the lock on the positioning post 9. Then, the plug 3 is pulled out from the secondary sealing box 2 without the need for strong prying or destructive operation, which greatly improves maintenance efficiency and safety.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An explosion-proof isolation sealing box, comprising a main sealing box (1) and a secondary sealing box (2), wherein the secondary sealing box (2) is fixedly connected to one side of the main sealing box (1), characterized in that, A T-shaped plug (3) is inserted into the free end of the secondary sealing box (2). A positioning boss (10) is fixedly connected inside the secondary sealing box (2) near its opening end. An inner cavity (301) is opened on the plug (3). An elastic positioning rod is arranged around the central axis of the plug (3) in the inner cavity (301). The free end of the elastic positioning rod passes through the plug (3) and connects to the positioning boss (10).

2. The explosion-proof isolation sealing box according to claim 1, characterized in that, The elastic positioning rod includes a ball head rod (6) and a compression spring (7) sleeved on the rod. The free end of the ball head rod (6) passes through the plug (3), and the two ends of the compression spring (7) are fixedly connected to the ball head of the ball head rod (6) and the cavity wall of the inner cavity (301) respectively.

3. The explosion-proof isolation sealing box according to claim 2, characterized in that, The plug (3) is fixedly fitted with a limiting ring (8) that contacts the positioning boss (10), and the limiting ring (8) is fixedly connected with a plurality of positioning posts (9) that pass through the positioning boss (10).

4. The explosion-proof isolation sealing box according to claim 3, characterized in that, Along the radial direction of the positioning boss (10), the positioning post (9) and the positioning boss (10) are respectively provided with a first positioning hole (901) and a second positioning hole (1001) for accommodating the free end of the ball head rod (6).

5. The explosion-proof isolation sealing box according to claim 4, characterized in that, The plug (3) is connected to a screw (4) by a threaded connection, and the free end of the screw (4) is fixedly connected to a frustum (41) tangent to the ball head of the ball head rod (6).

6. The explosion-proof isolation sealing box according to claim 5, characterized in that, A sealing ring (5) is provided between the plug (3) and the secondary sealing box (2).

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