Explosion-proof cable inlet and outlet device

Abstract

The utility model relates to the field of power construction, and particularly discloses an explosion-proof cable inlet and outlet device which comprises an inlet and outlet device which is a circular truncated cone body and is provided with a fourth cylinder, a third cylinder, a second cylinder, a first cylinder and a soft rubber layer from inside to outside in sequence. The second cylinder is connected with the first cylinder through a first connecting column, the third cylinder is connected with the second cylinder through an annular grid, the fourth cylinder is connected with the third cylinder through a second connecting column, a multi-layer protection structure is formed, and an anti-explosion assembly is arranged between the second cylinder and the third cylinder. The upper side of the small end of the soft rubber layer is connected with a buzzer and a metal net cover. The explosion-proof assembly is simple in structure and more convenient and quicker to maintain and use, meanwhile, due to the position design of the annular baffle plate and the buzzer, quick response can be achieved when abnormal conditions occur, the explosion-proof performance is enhanced, gas discharged through pressure relief is cooled through the metal net cover, and the safety performance of the device is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of electric power construction, specifically relates to an explosion -proof cable import and export device. BACKGROUND

[0002] With the continuous development of industry, the construction of various factory buildings and facilities is increasing. In the industrial production environment, especially in the dust factory and oil depot and other flammable and explosive places, the explosion-proof performance of electrical equipment is crucial. These areas have a large amount of combustible dust, gas or liquid, and once an electrical spark or short circuit occurs, it is easy to cause a fire or even an explosion, posing a serious threat to the safety of personnel and property. Therefore, to ensure the explosion-proof performance of electrical equipment, especially the sealing and explosion-proof performance of the cable box, has become a key link to ensure production safety.

[0003] The existing cable import and export plugging mode has fire clay plugging and mechanical compression plugging, but the plugging effect is not good. For example, the fire clay plugging may crack and fall off over time and with environmental changes, resulting in plugging failure. In addition, the fire clay is not easy to disassemble and maintain. When the cable needs to be repaired or replaced, the process of cleaning the fire clay is relatively cumbersome and may easily damage the cable. Secondly, mechanical compression plugging has a certain risk of damaging the cable. Excessive compression may damage the insulation layer of the cable, affecting the service life and safety of the cable. In addition, for different specifications of the cable, the position and pressure of the mechanical parts need to be adjusted, which is inconvenient to operate.

[0004] In view of the above shortcomings of the prior art, the utility model aims to provide an explosion-proof cable import and export device that can be safely used in dust factory, oil depot and other flammable and explosive places to overcome the problems existing in the prior art. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide an explosion-proof cable import and export device that is safe, reliable and easy to use.

[0006] In order to achieve the above purpose, the utility model has the following technical scheme:

[0007] The utility model provides an explosion-proof cable import and export device, which comprises an import and export device, the import and export device is a circular truncated cone body, and fourth, third, second, first cylinders and a soft rubber layer are sequentially arranged on the import and export device from inside to outside, wherein the second cylinder is fixedly connected with the first cylinder through a first connecting column, the third cylinder is fixedly connected with the second cylinder through an annular grid, the fourth cylinder is fixedly connected with the third cylinder through a second connecting column, an explosion-proof assembly is arranged between the second cylinder and the third cylinder, and a buzzer and a metal mesh cover are fixedly connected to the upper side of the small end of the soft rubber layer.

[0008] The explosion-proof assembly comprises a spring, a ring, a connecting rod and a ring-shaped shielding plate, wherein one end of the spring is fixedly connected with the ring-shaped grid, the other end is fixedly connected with the ring, a plurality of axial through holes are formed in the ring, the connecting rod is located between the ring and the ring-shaped shielding plate, the ring-shaped shielding plate is located on the upper side of the small head end of the soft rubber layer and is close to the buzzer, the buzzer and the ring-shaped shielding plate are located on the inner side of the metal mesh cover, and a hole through which a cable passes is formed in the upper side of the metal mesh cover.

[0009] The import and export device comprises a first cable fixing ring and a second cable fixing ring, wherein one end of the fourth cylinder is fixedly connected with the first cable fixing ring, the other end is fixedly connected with the second cable fixing ring, the opening of the first cable fixing ring is equal to the opening of the second cable fixing ring, and the cable passes through the first cable fixing ring and the second cable fixing ring.

[0010] Preferably, the first cylinder, the second cylinder, the third cylinder and the fourth cylinder are all tubular cylinders.

[0011] Preferably, the number of the spring and the connecting rod is four.

[0012] Preferably, when the import and export device is inverted, the elastic potential energy of the spring makes the ring-shaped shielding plate tightly adhere to the position on the upper side of the small head end of the soft rubber layer.

[0013] Preferably, the small head end of the import and export device is located on the outer side of the cable box.

[0014] Preferably, the first cable fixing ring and the second cable fixing ring are made of soft rubber material.

[0015] Preferably, the number of the metal mesh cover is copper wire mesh.

[0016] Preferably, the diameter of the hole in the metal mesh cover is equal to the diameter of the fourth cylinder. Beneficial effects

[0017] Compared with the prior art, the explosion-proof cable import and export device has the following beneficial effects:

[0018] 1. The import and export device provided by the utility model comprises an explosion-proof assembly and a buzzer, the explosion-proof assembly is simple in structure, comprises a spring, a ring, a connecting rod and a ring-shaped shielding plate, is more convenient and fast to maintain and use, and is easy to disassemble and install, and the position design of the ring-shaped shielding plate and the buzzer can rapidly respond when an abnormal situation occurs, and further enhances the overall explosion-proof performance.

[0019] 2. The first cable fixing ring and the second cable fixing ring can be applied to cables of different sizes, and can be closely attached to the cables, preventing the cables from falling during use, reducing the safety risks caused by the falling of the cables, and improving the versatility of the cable inlet and outlet device.

[0020] 3. The soft rubber layer can be applied to cable inlets and outlets of different sizes, and can block combustible materials in a combustible environment from entering the cable box.

[0021] 4. The metal mesh cover can cool the discharged gas, effectively preventing the occurrence of safety hazards after the discharge of high-temperature gas. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0023] Figure 1 is a schematic view of the three-dimensional structure of the present application;

[0024] Figure 2 is Figure 1 A-A sectional view of the schematic view;

[0025] Figure 3 is Figure 2 the enlarged rear view of B of the schematic view;

[0026] Figure 4 is a schematic view of the working state of the present application;

[0027] Figure 5 is a schematic view of the connection relationship of the first cylinder, the second cylinder, the third cylinder, the fourth cylinder, the first connecting rod, the annular mesh and the second connecting rod;

[0028] Figure 6 is a schematic view of the three-dimensional structure of the present application without the metal mesh cover.

[0029] BRIEF DESCRIPTION OF DRAWINGS

[0030] 10, import and export device; 20, soft rubber layer; 30, first cylinder; 31, second cylinder; 32, first connecting column; 40, third cylinder; 41, fourth cylinder; 42, second connecting column; 50, annular grid; 60, explosion-proof assembly; 61, spring; 62, circular ring; 63, connecting rod; 64, annular shielding plate; 70, buzzer; 80, first cable fixing ring; 81, second cable fixing ring; 90, metal mesh cover. DETAILED DESCRIPTION

[0031] In order to make the ordinary skilled in the art better understand the technical scheme of the utility model, the technical scheme of the utility model will be further described below in conjunction with the drawings and examples.

[0032] In the description of the utility model, it should be explained that if the terms "upper", "lower", "inner", "outer", "left", "right", "front", "rear" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship of the product in use, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, therefore it cannot be understood as a limitation of the utility model.

[0033] It should be noted that the features in the embodiments of the utility model can be combined with each other without conflict.

[0034] The specific implementation will be described as follows:

[0035] The embodiment of the explosion-proof cable import and export device provided by the utility model, see Figure 1 、 Figure 2 、 Figure 5 and Figure 6, including the import and export device 10, the import and export device 10 is a circular table body, the internal structure plays a protective role, and the import and export device 10 is sequentially provided with a fourth cylinder 41, a third cylinder 40, a second cylinder 31, a first cylinder 30 and a soft rubber layer 20 from inside to outside, and the small end of the import and export device 10 is located outside the cable box, wherein the second cylinder 31 is fixedly connected with the first cylinder 30 through a first connecting column 32, the third cylinder 40 is fixedly connected with the second cylinder 31 through an annular grid 50, and the fourth cylinder 41 is fixedly connected with the third cylinder 40 through a second connecting column 42, forming a multi-layer protective structure, improving the explosion-proof performance and stability of the device, an explosion-proof assembly 60 is arranged between the second cylinder 31 and the third cylinder 40, a buzzer 70 and a metal mesh cover 90 are fixedly connected to the upper side of the small end of the soft rubber layer 20, and the metal mesh cover 90 can cool the high-temperature gas discharged from the cable box due to pressure relief; the first cylinder 30, the second cylinder 31, the third cylinder 40 and the fourth cylinder 41 are all tubular cylinders;

[0036] Referring to Figure 2 , the explosion-proof assembly 60 comprises springs 61, a circular ring 62, connecting rods 63 and an annular shielding plate 64, wherein one end of the spring 61 is fixedly connected with the annular grid 50, the other end is fixedly connected with the circular ring 62, a plurality of through holes are formed in the circular ring 62, and the gas can be discharged through the through holes when pressure relief; the connecting rod 63 is located between the circular ring 62 and the annular shielding plate 64, the number of the springs 61 and the connecting rods 63 is four, the annular shielding plate 64 is located on the upper side of the small end of the soft rubber layer 20 and is close to the buzzer 70, the buzzer 70 and the annular shielding plate 64 are located on the inner side of the metal mesh cover 90, a hole through which the cable can pass is formed in the upper side of the metal mesh cover 90, and the diameter of the hole in the metal mesh cover 90 is equal to the diameter of the fourth cylinder 41; the annular shielding plate 64 triggers the buzzer 70 to alarm when it is lifted, reminding the staff to take timely measures, and the elastic potential energy of the spring 61 makes the annular shielding plate 64 closely adhere to the upper side of the small end of the soft rubber layer 20 when the import and export device 10 is inverted;

[0037] Referring to Figure 2 , the import and export device 10 comprises first and second cable fixing rings 80 and 81, wherein one end of the fourth cylinder 41 is fixedly connected with the first cable fixing ring 80, and the other end is fixedly connected with the second cable fixing ring 81, the opening of the first cable fixing ring 80 is smaller than that of the second cable fixing ring 81, the cable passes through the first cable fixing ring 80 and the second cable fixing ring 81, so that the cable is prevented from falling off during use, and the first and second cable fixing rings 80 and 81 are made of soft rubber material.

[0038] In the embodiment, the buzzer 70 is a device which is mature in prior art application, and the specific model can be selected according to actual needs.

[0039] In use, referring to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 6 , the small end of the import and export device 10 is directed to the outside of the cable box and clamped in the cable box side wall, blocking the combustible material in the combustible environment from entering the cable box to cause an accident. The cable passes through the first cable fixing ring 80, the second cable fixing ring 81 and the metal mesh cover 90. When the inside of the cable box is subjected to high temperature and the air pressure rises, the air pressure pushes the circular ring 62 to move outward of the cable box. The circular ring 62 drives the connecting rod 63 and the annular baffle 64 to be pushed out of the cable box, and at the same time, the annular baffle 64 opens the switch of the buzzer 70 to issue an alarm, reminding the staff to take timely measures. In addition, the metal mesh cover 90 performs cooling treatment on the discharged gas to prevent the discharged high-temperature gas from affecting the external environment.

[0040] It should be noted that in this document, the terms "comprise", "comprise", or any other variant thereof are intended to cover non-exclusive inclusion, so that processes, methods, articles or devices that include a series of elements not only include those elements, but also include other elements not explicitly listed, or also include elements inherent to such processes, methods, articles or devices. Without more limitations, the element defined by the statement "comprises a" does not exclude the presence of additional identical elements in the process, method, article or device that includes the element.

[0041] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and deformations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. An explosion-protected cable feedthrough, comprising a feedthrough (10), characterized in that: The import and export device (10) is a circular truncated cone, and the import and export device (10) is sequentially provided with a fourth cylinder (41), a third cylinder (40), a second cylinder (31), a first cylinder (30) and a soft rubber layer (20) from inside to outside, wherein The second cylinder (31) is connected with the first cylinder (30) through a first connecting column (32); The third cylinder (40) is connected with the second cylinder (31) through an annular mesh (50); The fourth cylinder (41) is connected with the third cylinder (40) through a second connecting column (42); An explosion-proof assembly (60) is arranged between the second cylinder (31) and the third cylinder (40); A buzzer (70) and a metal mesh cover (90) are arranged on the upper side of the small end of the soft rubber layer (20).

2. An explosion-proof cable entry and exit apparatus according to claim 1, characterized in that: The explosion-proof assembly (60) comprises a spring (61), a circular ring (62), a connecting rod (63) and an annular shielding plate (64), wherein One end of the spring (61) is connected with the annular mesh (50), and the other end is connected with the circular ring (62); The connecting rod (63) is located between the circular ring (62) and the annular shielding plate (64); The annular shielding plate (64) is located on the upper side of the small end of the soft rubber layer (20) and is close to the buzzer (70).

3. An explosion-proof cable entry and exit apparatus according to claim 2, characterized in that: A plurality of through holes are formed in the circular ring (62).

4. An explosion-proof cable entry device as defined in claim 1, characterized in that: The import and export device (10) comprises a first cable fixing ring (80) and a second cable fixing ring (81), wherein one end of the fourth cylinder (41) is provided with the first cable fixing ring (80), and the other end is provided with the second cable fixing ring (81).

5. An explosion-proof cable entry and exit apparatus according to claim 4, characterized in that: The opening of the first cable fixing ring (80) is equal to the opening of the second cable fixing ring (81), and the cable passes through the first cable fixing ring (80) and the second cable fixing ring (81).

6. An explosion-proof cable entry and exit apparatus according to claim 2, characterized in that: The buzzer (70) and the annular shielding plate (64) are located inside the metal mesh cover (90).

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