Flame resistance testing tool suitable for flame-retardant power cable

Abstract

The utility model belongs to the technical field of cable testing equipment, and particularly relates to a flame resistance testing tool suitable for a flame-retardant power cable, which comprises a testing host, an exhaust pipe is arranged on the top surface of the testing host, a vertical block is connected to the top surface of the testing host on the left side of the exhaust pipe, and a circulation groove is formed in the left side surface of the vertical block. And the top surface of the right side of the vertical block is connected with a connecting pipe, the other end of the connecting pipe is connected with one end of an exhaust pipe, and two sets of containing grooves are formed in the surface of the front end of the vertical block. Smoke exhausted from the exhaust pipe is conveyed into the circulating groove in the vertical block through the connecting pipe, and when the smoke circulates in the circulating groove, particulate matter and harmful substances in the smoke can be filtered through the silk screen filter element and the activated carbon filter element which are installed on the vertical block at the moment; and the filtered clean flue gas is discharged from the opening at one end of the circulating groove, so that the flue gas is prevented from being directly discharged into the environment to pollute the working environment.

Description

Technical Field

[0001] This utility model belongs to the technical field of cable testing equipment, specifically relating to a flame retardancy testing fixture suitable for flame retardant power cables. Background Technology

[0002] Flame-retardant power cables are cables with special fire-resistant properties. In the event of a fire, they can limit the spread of flames, buy time for personnel evacuation and fire rescue, and reduce the harm of fire.

[0003] During the production and processing of flame-retardant power cables, operators use horizontal and vertical combustion testers to test the cables to ensure their flame-retardant performance. The testers record data such as the distance the flame spreads and the burning speed to assess the cable's flame-retardant properties. However, the combustion of the flame-retardant cable inside the tester produces smoke. After the test, operators activate the internal exhaust fan, releasing the smoke directly to the outside through the exhaust pipe. This smoke contains particulate matter and harmful substances, which pollute the working environment. Furthermore, inhaling the smoke can negatively impact the health of the operators.

[0004] Therefore, this utility model provides a flame retardancy testing fixture suitable for flame retardant power cables to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a flame retardancy testing fixture suitable for flame retardant power cables. This fixture addresses the problem in existing horizontal and vertical combustion testers where, during use, the burning of flame retardant power cables inside the equipment produces smoke. After the test, the operator activates the internal exhaust fan, allowing the smoke to be directly discharged to the outside through the exhaust pipe. This smoke contains particulate matter and harmful substances, which then escape into the environment, polluting the working environment. Furthermore, the inhalation of this smoke by operators can negatively impact their health.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a flame retardancy testing fixture suitable for flame-retardant power cables, comprising a testing host, an exhaust pipe on the top surface of the testing host, a standing block connected to the top surface of the testing host on the left side of the exhaust pipe, a flow groove on the left side of the standing block, and a connecting pipe connected to the top surface of the right side of the standing block, the other end of the connecting pipe being connected to one end of the exhaust pipe, two sets of placement grooves on the front surface of the standing block, a wire mesh filter core slidingly placed in one placement groove, and an activated carbon filter core slidingly placed in the other placement groove, a sealing ring being connected around the outer surface of one end of each of the wire mesh filter core and the activated carbon filter core, one end of the sealing ring being engaged in a sealing groove, the sealing groove being opened on the inner surface of one end of the placement groove, and electric push rods symmetrically connected to the top surface of the standing block.

[0007] As a preferred embodiment of the flame retardancy testing fixture for flame retardant power cables according to this utility model, the position of the flow groove is connected to the position of the internal space of the connecting pipe.

[0008] As a preferred embodiment of the flame retardancy testing fixture for flame retardant power cables, the top surface of the upright block is connected with a butterfly bolt, and the other end of the butterfly bolt is threadedly connected to the fixing hole. Fixing holes are provided on the top surface of one end of the wire mesh filter element and the activated carbon filter element.

[0009] As a preferred embodiment of the present invention, a flame retardancy testing fixture for flame retardant power cables is provided, wherein the movable end of the electric push rod is connected to a connecting plate, one end of the connecting plate extends into a connecting groove, the connecting groove is opened on the right side surface of the top of the baffle, and a rubber pad is connected to the right side surface of the bottom of the baffle, the right side surface of the rubber pad is in contact with the left side surface of the upright block.

[0010] As a preferred embodiment of the flame retardancy testing fixture for flame retardant power cables according to this utility model, bolts are connected through the two ends of the top of the baffle, and the other end of the bolts forms a threaded connection with the threaded holes, which are opened on the two ends of the connecting plate.

[0011] As a preferred embodiment of the flame retardancy testing fixture for flame-retardant power cables according to this utility model, the electric push rod is electrically connected to an external power supply via a control switch.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention uses a connecting pipe to transport the flue gas emitted from the exhaust pipe into the flow groove inside the vertical block. When the flue gas flows in the flow groove, the wire mesh filter and activated carbon filter installed on the vertical block will filter the particulate matter and harmful substances in the flue gas. After filtration, the relatively clean flue gas is discharged from the open end of the flow groove, preventing the flue gas from being directly discharged into the environment and polluting the working environment.

[0014] This invention utilizes the cooperation of an electric push rod, a connecting plate, a baffle, and a rubber pad. When the testing host is not in use, the electric push rod can be activated, allowing its movable end to drive the baffle towards the left side of the stand block via the connecting plate. At this time, the rubber pad on the baffle will press against the left side of the stand block, creating a relatively sealed state between the baffle and the stand block. This effectively prevents external air from entering the stand block and prevents the activated carbon filter element from being in constant contact with external air, thus affecting its service life. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the partially exploded structure of the vertical block of this utility model;

[0018] Figure 3 This is a partial cross-sectional structural diagram of the upright block of this utility model;

[0019] Figure 4 This is a schematic diagram of the baffle structure of this utility model.

[0020] In the diagram: 1. Test host; 2. Exhaust pipe; 3. Stand block; 4. Flow channel; 5. Connecting pipe; 6. Placement slot; 7. Wire mesh filter element; 8. Activated carbon filter element; 9. Sealing ring; 10. Sealing slot; 11. Butterfly bolt; 12. Fixing hole; 13. Electric push rod; 14. Connecting plate; 15. Connecting slot; 16. Baffle; 17. Rubber pad; 18. Bolt; 19. Threaded hole. Detailed Implementation

[0021] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-4 This utility model provides the following technical solution: a flame retardancy testing fixture suitable for flame retardant power cables, including a test host 1, the test host 1 being a DR-C313 horizontal and vertical combustion tester, an exhaust pipe 2 on the top surface of the test host 1, a block 3 connected to the top surface of the test host 1 on the left side of the exhaust pipe 2, a flow groove 4 on the left side of the block 3, and a connecting pipe 5 connected to the top surface of the right side of the block 3, the other end of the connecting pipe 5 being connected to one end of the exhaust pipe 2, two sets of placement grooves 6 on the front surface of the block 3, a wire mesh filter core 7 slidingly placed inside one placement groove 6, and an activated carbon filter core 8 slidingly placed inside the other placement groove 6, a sealing ring 9 being connected around the outer surface of one end of both the wire mesh filter core 7 and the activated carbon filter core 8, one end of the sealing ring 9 being engaged in a sealing groove 10, the sealing groove 10 being opened on the inner surface of one end of the placement groove 6, and an electric push rod 13 symmetrically connected to the top surface of the block 3.

[0023] Preferably, the position of the flow channel 4 is connected to the position of the internal space of the connecting pipe 5.

[0024] In practical use, the air in the exhaust pipe 2 can enter the flow channel 4 through the connecting pipe 5, and then be discharged from the opening at one end of the flow channel 4.

[0025] Preferably, a butterfly bolt 11 is connected through the top surface of the upright block 3, and the other end of the butterfly bolt 11 is threadedly connected to the fixing hole 12. Fixing holes 12 are opened on the top surface of one end of the wire mesh filter element 7 and the activated carbon filter element 8.

[0026] In practical use, when the wire mesh filter element 7 and the activated carbon filter element 8 are slidably placed into their respective placement slots 6, the butterfly bolt 11 can be screwed through the upright block 3 into the fixing hole 12 on the wire mesh filter element 7 and the activated carbon filter element 8 to fix their positions in the placement slots 6 on the upright block 3. By unscrewing the butterfly bolt 11, the wire mesh filter element 7 and the activated carbon filter element 8 can be pulled out from the placement slots 6 for maintenance.

[0027] Preferably, the movable end of the electric push rod 13 is connected to a connecting plate 14, one end of the connecting plate 14 extends into the connecting groove 15, the connecting groove 15 is opened on the right side surface of the top end of the baffle 16, and a rubber pad 17 is connected to the right side surface of the bottom end of the baffle 16, the right side surface of the rubber pad 17 is in contact with the left side surface of the block 3.

[0028] In practical use, by activating the electric push rod 13, the movable end of the electric push rod 13 can drive the baffle 16 to move through the connecting plate 14, so that the rubber pad 17 on the right side of the baffle 16 can contact the left side surface of the block 3 or separate the rubber pad 17 on the right side of the baffle 16 from the left side surface of the block 3.

[0029] Preferably, bolts 18 are connected through the two ends of the top end of the baffle 16, and the other end of the bolt 18 forms a threaded connection with the threaded hole 19, which is opened on both ends of the connecting plate 14.

[0030] In practical use, when one end of the connecting plate 14 slides into the connecting groove 15 on the baffle 16, the bolt 18 can be screwed through the baffle 16 into the threaded hole 19 on the connecting plate 14. At this time, the position of the connecting plate 14 will be fixed in the connecting groove 15, so that the movable end of the electric push rod 13 can drive the baffle 16 to move through the connecting plate 14.

[0031] Preferably, the electric push rod 13 is electrically connected to an external power source via a control switch.

[0032] In actual use, the electric push rod 13 can be controlled by a switch.

[0033] It should be noted that the sealing ring 9 is made of rubber. When the wire mesh filter element 7 and the activated carbon filter element 8 are slidably placed into the corresponding placement grooves 6 on the vertical block 3, the sealing ring 9 on the wire mesh filter element 7 and the activated carbon filter element 8 will move to the sealing grooves 10 opened in the corresponding placement grooves 6. The sealing ring 9 can be elastically engaged in the sealing grooves 10, thereby increasing the sealing between the wire mesh filter element 7 and the activated carbon filter element 8 and the vertical block 3, and preventing the gas in the flow channel 4 from escaping from the placement grooves 6.

[0034] Working principle: When using this flame retardancy testing fixture suitable for flame-retardant power cables, the operator cuts a suitable sample from the flame-retardant power cable to be tested, opens the door of the testing unit 1, and vertically fixes the flame-retardant power cable sample on the sample holder, ensuring that the bottom of the flame-retardant power cable sample is 10-20mm from the top of the burner. Then, according to relevant standards and testing requirements, the door is closed, and parameters such as combustion time and ignition time are set. The gas valve is opened, the burner is ignited, and the flame height is adjusted to 20-40mm. Then, the burner is moved under the flame-retardant power cable sample, and ignition is performed according to the set ignition time. After ignition, the flame retardancy is observed. The burning of the power cable sample is recorded, including the height of flame spread and self-extinguishing time. If dripping occurs during the combustion process, it is necessary to observe whether the dripping ignites the degreasing cotton below and record the data. After the test, the flame-retardant performance of the power cable can be evaluated according to the relevant standard judgment rules based on the test data. After each test, the operator will turn on the exhaust fan inside the test host 1 to allow the exhaust fan to discharge the smoke generated by the burning flame-retardant power cable inside the test host 1 through the exhaust pipe 2. At this time, the smoke transported in the exhaust pipe 2 will enter the flow groove 4 in the vertical block 3 through the connecting pipe 5. When the gas flows through the flow channel 4 in block 3, the flue gas first passes through the wire mesh filter element 7, which can block and filter larger particles in the flue gas. After preliminary filtration, the flue gas passes through the activated carbon filter element 8 again, which can block and filter harmful substances and fine particles in the flue gas. Only after this filtration is the relatively clean flue gas discharged to the outside from the opening at one end of the flow channel 4, preventing the flue gas from being directly discharged into the environment and polluting the working environment, and ensuring the health of the operators. Secondly, when the test host 1 is not in use, the electric push rod 13 can be activated, and the movable end of the electric push rod 13 passes through the connecting plate. 14 drives the baffle 16 to move closer to the left side of the upright block 3. At this time, the rubber pad 17 on the baffle 16 will come into contact with the left side surface of the upright block 3. Through the slight compression of the rubber pad 17, the baffle 16 and the upright block 3 can form a relatively sealed state through the rubber pad 17, which can effectively block the external air from entering the upright block 3 and prevent the activated carbon filter element 8 from being in constant contact with the external air, thus affecting its service life. At the same time, when the test host 1 is in use, the electric push rod 13 can be activated, so that the movable end of the electric push rod 13 can drive the rubber pad 17 on the baffle 16 to separate from the upright block 3 through the connecting plate 14, so that the flow groove 4 can be exposed, ensuring the normal flow of air in the flow groove 4.

[0035] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A flame retardancy testing fixture suitable for flame-retardant power cables, comprising a testing host (1), characterized in that: The test host (1) has an exhaust pipe (2) on its top surface. A block (3) is connected to the top surface of the test host (1) on the left side of the exhaust pipe (2). A flow groove (4) is opened on the left side surface of the block (3), and a connecting pipe (5) is connected to the top surface of the right side of the block (3). The other end of the connecting pipe (5) is connected to one end of the exhaust pipe (2). Two sets of placement grooves (6) are opened on the front surface of the block (3). A wire mesh filter core (7) is slidably placed in one placement groove (6), and an activated carbon filter core (8) is slidably placed in the other placement groove (6). A sealing ring (9) is connected around the outer surface of one end of the wire mesh filter core (7) and the activated carbon filter core (8). One end of the sealing ring (9) is engaged in the sealing groove (10). The sealing groove (10) is opened on the inner surface of one end of the placement groove (6). An electric push rod (13) is symmetrically connected to the top surface of the block (3).

2. The flame retardancy testing fixture for flame-retardant power cables according to claim 1, characterized in that: The position of the flow channel (4) is connected to the position of the internal space of the connecting pipe (5).

3. The flame retardancy testing fixture for flame-retardant power cables according to claim 1, characterized in that: The top surface of the stand block (3) is connected by a butterfly bolt (11), and the other end of the butterfly bolt (11) is connected to the fixing hole (12) by a thread. The top surface of the wire mesh filter core (7) and the activated carbon filter core (8) are both provided with fixing holes (12).

4. The flame retardancy testing fixture for flame-retardant power cables according to claim 1, characterized in that: The movable end of the electric push rod (13) is connected to a connecting plate (14), one end of the connecting plate (14) extends into the connecting groove (15), the connecting groove (15) is opened on the right side surface at the top of the baffle (16), and a rubber pad (17) is connected to the right side surface at the bottom of the baffle (16), the right side surface of the rubber pad (17) is in contact with the left side surface of the upright block (3).

5. A flame retardancy testing fixture for flame-retardant power cables according to claim 4, characterized in that: Bolts (18) are connected through the two ends of the top of the baffle (16). The other end of the bolt (18) is connected to the threaded hole (19). The threaded hole (19) is opened on both ends of the connecting plate (14).

6. The flame retardancy testing fixture for flame-retardant power cables according to claim 1, characterized in that: The electric push rod (13) is electrically connected to an external power source via a control switch.

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