Fireproof Cable Burning Test Chamber

Abstract

The invention discloses a fireproof cable combustion test box, including a test box, a heat-conducting partition with a cross-section of a plurality of shapes is arranged in the test box, the heat-conducting partition divides the inner cavity of the test box into an evaporation chamber and a combustion chamber, and the evaporation chamber is filled with evaporative liquid, a pressure relief component is arranged on one side of the upper part of the test box, and an air guide pipe is arranged at the air outlet end of the pressure relief component, a condenser fixedly connected to the test box is connected to the air outlet end of the air guide pipe, a plunger mechanism for condensed evaporative liquid to flow back into the evaporation chamber is arranged at the lower part of the condenser, a rotating component for driving the cable to rotate is inlaid at the upper end of the test box, a driving component for driving the plunger mechanism and the rotating component at the same time is arranged on one side of the upper end of the test box, and the pressure relief component controls the start of the driving component, and the clamping end of the clamping block is symmetrically provided with guide wheels. The invention can keep the temperature of the combustion chamber within the temperature range required for the test, and avoid the temperature of the test environment from having an adverse effect on the test results.

Description

Technical Field

[0001] The invention relates to the technical field of cable testing equipment, in particular to a fireproof cable combustion test box. Background Art

[0002] Fireproof cables refer to wires and cables that can block and delay the spread and extension of flames along the wires and cables when a fire accident occurs, and minimize the expansion of the fire range of the wires and cables. This type of cable has the characteristic of self-extinguishing after catching fire. It can be generally understood that when the wire and cable product catches fire due to its own fire or external heat source, after the fire source is extinguished, the wire and cable product will no longer continue to burn, or the burning time is very short. Fireproof wires and cables need to be subjected to combustion tests after production to test the safety of fireproof cables.

[0003] Patent application number CN111189960A discloses a single cable vertical combustion test device, including a test box, a combustion chamber is provided inside, a through hole connected to the outside is provided on the top of the combustion chamber; a blowtorch; a lifting plate, a through hole is provided inside and passes through the upper and lower end faces, and the central axis of the through hole coincides with the central axis of the through hole; a lifting mechanism, which is connected to the lifting plate by power and fixed in the test box; a clamping part, a clamping part is provided in the through hole; when the cable sample passes through the through hole and extends into the through hole, the clamping part fixes the end of the cable sample, and drives the lifting plate to move the cable sample to the bottom of the combustion chamber through the lifting mechanism. A blowtorch is used to carry out a combustion test on the cable sample. After the test is completed, the lifting mechanism takes the burned cable sample out of the combustion chamber. During the test, even if multiple cables are tested, there is no need to open the test instrument, which reduces the possibility of residual toxic gases inside the test instrument entering the laboratory environment and ensures the personal safety of the test personnel. However, there are still some shortcomings, such as the inability to control the temperature of the combustion chamber where the burning fire-resistant cable sample is located, so that the high temperature remaining from the previous combustion test will have an adverse effect on the subsequent test, making the fire resistance performance of the cable obtained from the combustion test not accurate enough. Summary of the invention

[0004] The object of the present invention is to provide a fireproof cable combustion test box to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a fireproof cable combustion test box, comprising a test box and a clamping block, wherein a heat-conducting partition with a cross-section of a polygonal shape is arranged in the test box, the heat-conducting partition divides the inner cavity of the test box into an evaporation chamber and a combustion chamber, and the evaporation chamber is filled with evaporative liquid, a pressure relief component is arranged on one side of the upper part of the test box, and an air guide pipe is arranged at the air outlet end of the pressure relief component, the air outlet end of the air guide pipe is connected to a condenser fixedly connected to the test box, a plunger mechanism for reflux of the condensed evaporative liquid into the evaporation chamber is arranged at the lower part of the condenser, a rotating component for driving the cable to rotate is inlaid at the upper end of the test box, a driving component for simultaneously driving the plunger mechanism and the rotating component is arranged on one side of the upper end of the test box, and the pressure relief component controls the start of the driving component, guide wheels are symmetrically arranged at the clamping end of the clamping block, and an air inlet pipe and an exhaust pipe are arranged at the inlet and outlet of the test box respectively.

[0006] Preferably, the pressure relief assembly includes a pressure relief cylinder, a connecting frame, a contact switch, a compression spring, a valve core and a push rod. A pressure relief through hole is opened on one side of the upper portion of the test box, a valve core is inserted in the pressure relief through hole, a push rod is provided on the side of the valve core away from the pressure relief through hole, a compression spring is sleeved on the outer side of the push rod, a pressure relief cylinder fixedly connected to the test box is sleeved on the outer side of the compression spring, the pressure relief cylinder is connected to a connecting frame at one end away from the test box, a contact switch opposite to the push rod is installed on the connecting frame, and the contact switch is electrically connected to the driving assembly.

[0007] Preferably, the plunger mechanism includes a drainage tube, a plunger barrel, a piston rod, a liquid inlet one-way valve, a liquid outlet one-way valve, a preheating tube and a return spring. A plunger barrel is provided on one side of the condenser, and a drainage tube connected to the condenser is provided on one side of the upper end of the plunger barrel. A return spring and a piston rod are sequentially provided in the plunger barrel from bottom to top, and the piston part of the piston rod is evenly provided with a liquid inlet one-way valve, and a liquid outlet one-way valve is provided at the lower end of the plunger barrel, and the liquid outlet end of the liquid outlet one-way valve is connected to the preheating tube connected to the evaporation chamber.

[0008] Preferably, the rotating assembly includes a mounting seat, a tightening spring, a sliding seat, a worm, a first rotating shaft, a worm wheel, a driving roller and a pressure cover, the upper end of the mounting seat is symmetrically provided with a guide slot, a tightening spring is arranged in the guide slot, a sliding seat is arranged at the ejection end of the tightening spring, a worm is rotatably arranged in the sliding seat, one end of the worm is connected and fixed to the driving assembly, a first rotating shaft is rotatably arranged in the sliding seat, a worm wheel matching the worm is sleeved on the outer side of the first rotating shaft, a driving roller for driving the cable to rotate is sleeved on the outer side of the upper end of the first rotating shaft, and a pressure cover is arranged on the upper end of the mounting seat.

[0009] Preferably, the driving assembly includes a driving motor, a transmission shaft, a driving gear, a transmission gear, a support seat, a second rotating shaft, a driven gear, a first transmission rod, a second transmission rod, a cam and a pressure rod. A mounting groove is provided at the upper end of the mounting seat, and a support seat is symmetrically arranged in the mounting groove. A second rotating shaft is evenly rotated on one side of the two support seats, a driven gear is sleeved on the outer side of one end of the second rotating shaft, and a first transmission rod is hinged through the support seat at the other end, an inner spline slot is provided at the other end of the two first transmission rods, and a second transmission rod hinged to the worm is inserted in the inner spline slot, a transmission shaft is penetrated on one side of the test box, a driving gear meshing with the driven gear on the adjacent side is sleeved on the outer side of the transmission shaft, and a transmission gear for transmission is arranged between the driving gear and the other driven gear, a pressure rod of a driving plunger mechanism is slidably arranged on one side of the test box, a cam opposite to the pressure rod is sleeved on the outer side of the transmission shaft, and a driving motor driving the transmission shaft is installed on the test box.

[0010] Preferably, the condenser includes a liquid storage tank, a heat dissipation fan and a condensation manifold. The liquid storage tank is fixedly mounted on the test box, the heat dissipation fan is arranged on an upper side of the liquid storage tank, and the condensation manifold is evenly penetrated through the side of the liquid storage tank opposite to the heat dissipation fan.

[0011] Preferably, the air inlet pipe is made of a heat-conducting material, and the exhaust pipe is made of a heat-insulating material.

[0012] Compared with the prior art, the present invention provides a fireproof cable combustion test box, which has the following beneficial effects: the present invention divides the test box into an evaporation chamber and a combustion chamber by a heat-conducting partition, so that the high temperature of the combustion chamber is transferred to the evaporation chamber, and the heat is carried away and discharged by the evaporation of the evaporating liquid in the evaporating chamber, so that the temperature of the combustion chamber is maintained within the temperature range required for the test, avoiding the temperature of the test environment from having an adverse effect on the test result, and at the same time, the evaporating liquid is converted from gas to liquid through a condenser, so that the heat carried by the gaseous evaporating liquid is released, and the re-liquefied evaporating liquid is re-injected into the evaporating chamber through a plunger mechanism, so that the evaporating liquid can be recycled, and at the same time, the rotation of the rotating assembly is controlled by the driving assembly, so that the cable clamped by the clamping block can rotate, so that the outer side of the lower end of the cable can be evenly and fully contacted with the flame of the blowtorch. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a front cross-sectional view of the present invention;

[0014] Figure 2 It is a left side cross-sectional view of the present invention;

[0015] Figure 3 for Figure 1 Schematic diagram of the cross-section structure at point A in the middle;

[0016] Figure 4 for Figure 1 Schematic diagram of the cross-section structure at point B;

[0017] Figure 5 for Figure 3 Schematic diagram of the cross-section structure at point C in the middle;

[0018] Figure 6 for Figure 1 The enlarged structural diagram of the middle D part;

[0019] Figure 7 for Figure 2 The enlarged structural diagram of part E in the middle;

[0020] Figure 8 for Figure 3 The enlarged structural diagram of the middle F part;

[0021] Fig. 9 for Figure 5 Schematic diagram of the enlarged structure of part G in the middle.

[0022] In the figure: 1, test box; 100, evaporation chamber; 101, combustion chamber; 2, clamping block; 3, heat-conducting baffle; 4, pressure relief assembly; 40, pressure relief cylinder; 41, connecting frame; 42, contact switch; 43, compression spring; 44, valve core; 45, push rod; 5, air guide pipe; 6, condenser; 60, liquid accumulation box; 61, cooling fan; 62, condensation manifold; 7, plunger mechanism; 70, drainage pipe; 71, plunger cylinder; 72, piston rod; 73, liquid inlet check valve; 74, liquid outlet check valve; 75, preheating pipe; 76, reset spring; 8, rotating assembly; 80, mounting seat; 81, tightening spring; 82, sliding seat; 83, worm; 84, first rotating shaft; 85, worm wheel; 86. driving roller; 87. pressure cover; 9. driving assembly; 90. driving motor; 91. transmission shaft; 92. driving gear; 93. transmission gear; 94. supporting seat; 95. second rotating shaft; 96. driven gear; 97. first transmission rod; 98. second transmission rod; 99. cam; 910. pressure rod; 10. guide wheel; 11. intake pipe; 12. exhaust pipe. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] See also Figure 1-9, the fireproof cable combustion test box embodiment provided by the present invention: the fireproof cable combustion test box comprises a test box 1 and a clamping block 2, the test box 1 is provided with a heat-conducting partition 3 with a cross-section of a polygonal shape, the heat-conducting partition 3 divides the inner cavity of the test box 1 into an evaporation chamber 100 and a combustion chamber 101, and the evaporation chamber 100 is filled with evaporation liquid, the boiling point of the evaporation liquid is the same as the temperature required by the test, so that the high temperature of the combustion chamber 101 is transferred to the evaporation chamber 100 through the heat-conducting partition 3, and the heat is absorbed by the evaporation of the evaporation liquid in the evaporation chamber 100, and a pressure relief through hole is opened on one side of the upper part of the test box 1, a valve core 44 is inserted in the pressure relief through hole, a push rod 45 is arranged on the side of the valve core 44 away from the pressure relief through hole, a compression spring 43 is sleeved on the outer side of the push rod 45, a pressure relief cylinder 40 fixedly connected to the test box 1 is sleeved on the outer side of the compression spring 43, and a connecting frame 41 is connected to the end of the pressure relief cylinder 40 away from the test box 1 A contact switch 42 opposite to the push rod 45 is installed on the connecting frame 41, and the contact switch 42 is electrically connected to the driving component 9. When the air pressure in the evaporation chamber 100 reaches the pressure set point of the pressure relief component 4, the vaporized evaporating liquid pushes the valve core 44 and is discharged from the evaporation chamber 100. At the same time, the push rod 45 is driven by the valve core 44 to press the contact switch 42, so that the driving motor 90 is powered and works, and the vaporized evaporating liquid is discharged into the condenser 6 through the air guide pipe 5, so that the vaporized evaporating liquid is liquefied again.

[0025] A mounting groove is provided at the upper end of the mounting seat 80, and a support seat 94 is symmetrically provided in the mounting groove. A second rotating shaft 95 is evenly rotated on one side of the two support seats 94. A driven gear 96 is sleeved on the outer side of one end of the second rotating shaft 95, and the other end of the second rotating shaft 95 passes through the support seat 94 and is hinged with a first transmission rod 97. An inner spline slot is provided at the other end of the two first transmission rods 97, and a second transmission rod 98 hinged to the worm 83 is inserted in the inner spline slot. A transmission shaft 91 is penetrated on one side of the test box 1, and a driven gear 96 is sleeved on the outer side of the transmission shaft 91. A driving gear 92 meshed with a wheel 96 is provided, and a transmission gear 93 for transmission is provided between the driving gear 92 and another driven gear 96. A pressure rod 910 for driving the plunger mechanism 7 is slidably provided on one side of the test box 1. A cam 99 opposite to the pressure rod 910 is sleeved on the outer side of the transmission shaft 91. A driving motor 90 for driving the transmission shaft 91 is installed on the test box 1, and a guide slide groove is symmetrically provided at the upper end of the mounting seat 80. A tightening spring 81 is provided in the guide slide groove. A sliding seat 82 is provided at the ejection end of the tightening spring 81. A worm 83 is rotatably provided in the sliding seat 82. The worm 83 One end of the mounting seat 80 is connected and fixed with the driving assembly 9, a first rotating shaft 84 is rotatably arranged in the sliding seat 82, a worm wheel 85 matching the worm 83 is sleeved on the outer side of the first rotating shaft 84, a driving roller 86 for driving the cable to rotate is sleeved on the outer side of the upper end of the first rotating shaft 84, a pressure cover 87 is arranged on the upper end of the mounting seat 80, and a driving motor 90 drives the transmission shaft 91 to rotate, so that the transmission shaft 91 drives the cam 99 to rotate, so that the cam 99 pushes the pressure rod 910 to slide downward, and at the same time, the transmission shaft 91 drives the driving gear 92 to rotate. The two driven gears 96 rotate synchronously in the same direction through the transmission gear 93, so that the two second rotating shafts 95 can rotate synchronously, and then the two worm gears 83 rotate synchronously through the transmission of the first transmission rod 97 and the second transmission rod 98. The meshing transmission between the worm gear 83 and the worm wheel 85 makes the first rotating shaft 84 drive the driving roller 86 to rotate, thereby driving the cable to rotate. At the same time, guide wheels 10 are symmetrically arranged at the front and back of the clamping end of the clamping block 2, so that the clamped cable can rotate smoothly.

[0026] A plunger cylinder 71 is provided on one side of the condenser 6, and a drainage pipe 70 connected to the condenser 6 is provided on one side of the upper end of the plunger cylinder 71. A return spring 76 and a piston rod 72 are provided in the plunger cylinder 71 from bottom to top, and the piston portion of the piston rod 72 is evenly provided with a liquid inlet check valve 73. The lower end of the plunger cylinder 71 is provided with a liquid outlet check valve 74, and the liquid outlet end of the liquid outlet check valve 74 is connected to a preheating pipe 75 connected to the evaporation chamber 100. The piston rod 72 is pushed downward by the pressure rod 910 so that the piston rod 72 squeezes the reliquefied evaporating liquid into the evaporation chamber 100, and the return spring 76 is deformed and contracted. When the cam 99 no longer presses the piston rod 72 downward, the piston rod 72 is pushed to reset upward by the elastic force of the return spring 76, and the liquid outlet check valve 74 is used to allow the liquefied evaporating liquid to flow into the chamber below the movable piston rod 72 through the liquid inlet check valve 73.

[0027] The inlet and outlet of the test box 1 are respectively provided with an air inlet pipe 11 and an exhaust pipe 12. The air inlet pipe 11 is made of a heat-conducting material, and the exhaust pipe 12 is made of a heat-insulating material. The evaporative liquid in the evaporation chamber 100 makes the temperature of the gas passing through the air inlet pipe 11 the same as the temperature required for the test.

[0028] In this implementation, if Figure 2 As shown, the condenser 6 includes a liquid storage tank 60, a heat dissipation fan 61 and a condensation manifold 62. The liquid storage tank 60 is fixedly arranged on the test box 1, the heat dissipation fan 61 is arranged on the upper side of the liquid storage tank 60, and the condensation manifold 62 is evenly penetrated through the side of the liquid storage tank 60 opposite to the heat dissipation fan 61. The vaporized evaporative liquid is condensed and liquefied through the condensation manifold 62, and the heat released by the liquefaction of the evaporative liquid is carried away by the flowing air through the heat dissipation fan 61, so that the evaporative liquid can be quickly liquefied and flow back into the evaporation chamber 100.

[0029] Working principle: When working, the high temperature of the combustion chamber 101 is transferred to the evaporation chamber 100 by the heat-conducting baffle 3, and the heat is absorbed by the evaporation of the evaporation liquid in the evaporation chamber 100. When the air pressure in the evaporation chamber 100 reaches the pressure set by the pressure relief component 4, the vaporized evaporation liquid pushes the valve core 44 and is discharged from the evaporation chamber 100. At the same time, the valve core 44 drives the push rod 45 to press the contact switch 42, so that the drive motor 90 is powered on and works, and the drive motor 90 drives the transmission shaft 91 to rotate, and the transmission shaft 91 drives the driving gear 92 The first transmission rod 97 and the second transmission rod 98 are driven to rotate the two worms 83 synchronously, and the meshing transmission between the worm 83 and the worm wheel 85 causes the first rotating shaft 84 to drive the driving roller 86 to rotate, thereby driving the cable to rotate. At the same time, the guide wheel 10 provided at the clamping end of the clamping block 2 is used to make the clamped cable rotate smoothly. The gasified evaporating liquid is discharged into the condenser 6 by the air guide pipe 5, so that the gasified evaporating liquid is liquefied again. At the same time, the transmission shaft 91 is used to drive the cam 99 to rotate, so that the cam 99 The pressure rod 910 is pushed to slide downward, and the pressure rod 910 is used to push the piston rod 72 downward, so that the piston rod 72 squeezes the re-liquefied evaporating liquid into the evaporation chamber 100, and at the same time the return spring 76 deforms and contracts. When the cam 99 no longer presses the piston rod 72 downward, the elastic force of the return spring 76 is used to push the piston rod 72 to return upward, and the liquid outlet one-way valve 74 is used to allow the liquefied evaporating liquid to flow into the chamber below the movable piston rod 72 through the liquid inlet one-way valve 73.

[0030] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0031] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" 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 a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A fireproof cable combustion test box, comprising a test box (1) and a clamping block (2), characterized in that: The test box (1) is provided with a heat-conducting baffle (3) having a cross-section in a polygonal shape, the heat-conducting baffle (3) dividing the inner cavity of the test box (1) into an evaporation cavity (100) and a combustion cavity (101), and the evaporation cavity (100) is filled with evaporation liquid. A pressure relief component (4) is provided on one side of the upper part of the test box (1), and an air guide pipe (5) is provided at the air outlet end of the pressure relief component (4), the air outlet end of the air guide pipe (5) is connected to a condenser (6) fixedly connected to the test box (1), and a plunger mechanism (7) for returning the condensed evaporation liquid to the evaporation cavity (100) is provided at the lower part of the condenser (6). A rotating component (8) for driving the cable to rotate is embedded at the upper end of the test box (1), and a driving component (9) for simultaneously driving the plunger mechanism (7) and the rotating component (8) is provided on one side of the upper end of the test box (1), and the pressure relief component (4) controls the driving component (9). During startup, the clamping end of the clamping block (2) is symmetrically provided with guide wheels (10) at the front and rear ends, and the inlet and outlet of the test box (1) are provided with an air intake pipe (11) and an exhaust pipe (12) respectively; the pressure relief component (4) comprises a contact switch (42), a valve core (44) and a push rod (45); the drive component (9) comprises a drive motor (90); the boiling point of the evaporating liquid is the same as the temperature required for the test. During operation, the high temperature of the combustion chamber (101) is transferred to the evaporation chamber (100) by using the heat-conducting baffle (3), and the heat is absorbed by evaporating the evaporating liquid in the evaporation chamber (100). When the air pressure in the evaporation chamber (100) reaches the pressure set by the pressure relief component (4), the vaporized evaporating liquid pushes the valve core (44) and is discharged from the evaporation chamber (100), and at the same time, the push rod (45) is driven by the valve core (44) to press the contact switch (42), so that the drive motor (90) is powered and operates.

2. The fireproof cable combustion test box according to claim 1 is characterized in that: The pressure relief assembly (4) further comprises a pressure relief cylinder (40), a connecting frame (41), and a compression spring (43). A pressure relief through hole is provided on one side of the upper portion of the test box (1), a valve core (44) is inserted into the pressure relief through hole, a push rod (45) is provided on the side of the valve core (44) away from the pressure relief through hole, a compression spring (43) is sleeved on the outer side of the push rod (45), a pressure relief cylinder (40) fixedly connected to the test box (1) is sleeved on the outer side of the compression spring (43), the pressure relief cylinder (40) is connected to the connecting frame (41) at one end of the pressure relief cylinder (40) away from the test box (1), a contact switch (42) opposite to the push rod (45) is mounted on the connecting frame (41), and the contact switch (42) is electrically connected to the drive assembly (9).

3. The fireproof cable combustion test box according to claim 1 is characterized in that: The plunger mechanism (7) comprises a drainage tube (70), a plunger cylinder (71), a piston rod (72), a liquid inlet check valve (73), a liquid outlet check valve (74), a preheating tube (75) and a return spring (76); a plunger cylinder (71) is provided on one side of the condenser (6); a drainage tube (70) connected to the condenser (6) is provided on one side of the upper end of the plunger cylinder (71); a return spring (76) and a piston rod (72) are provided in sequence from bottom to top in the plunger cylinder (71); a liquid inlet check valve (73) is evenly provided on the piston portion of the piston rod (72); a liquid outlet check valve (74) is provided at the lower end of the plunger cylinder (71); and a liquid outlet end of the liquid outlet check valve (74) is connected to a preheating tube (75) connected to the evaporation chamber (100).

4. The fireproof cable combustion test box according to claim 1, characterized in that: The rotating assembly (8) comprises a mounting seat (80), a tightening spring (81), a sliding seat (82), a worm (83), a first rotating shaft (84), a worm wheel (85), a driving roller (86) and a pressure cover (87). A guide slot is symmetrically provided at the upper end of the mounting seat (80), a tightening spring (81) is provided in the guide slot, a sliding seat (82) is provided at the ejecting end of the tightening spring (81), a worm (83) is rotatably provided in the sliding seat (82), one end of the worm (83) is connected and fixed to the driving assembly (9), a first rotating shaft (84) is rotatably provided in the sliding seat (82), a worm wheel (85) matching the worm (83) is sleeved on the outer side of the first rotating shaft (84), a driving roller (86) for driving the cable to rotate is sleeved on the outer side of the upper end of the first rotating shaft (84), and a pressure cover (87) is provided on the upper end of the mounting seat (80).

5. The fireproof cable combustion test box according to claim 4 is characterized in that: The driving assembly (9) further comprises a transmission shaft (91), a driving gear (92), a transmission gear (93), a support seat (94), a second rotating shaft (95), a driven gear (96), a first transmission rod (97), a second transmission rod (98), a cam (99) and a pressure rod (910); a mounting groove is provided at the upper end of the mounting seat (80), and the supporting seats (94) are symmetrically arranged in the mounting groove; a second rotating shaft (95) is evenly rotated and arranged on one side of the two supporting seats (94); a driven gear (96) is sleeved on the outer side of one end of the second rotating shaft (95), and the other end of the second rotating shaft (95) passes through the supporting seat (94) and is hinged with a first transmission rod (97); the two first transmission rods (97) are The other end is provided with an internal spline slot, in which a second transmission rod (98) hinged to the worm (83) is inserted. A transmission shaft (91) is provided through one side of the test box (1). A driving gear (92) meshing with a driven gear (96) on an adjacent side is sleeved on the outer side of the transmission shaft (91), and a transmission gear (93) for transmission is provided between the driving gear (92) and the other driven gear (96). A pressure rod (910) for driving a plunger mechanism (7) is slidably provided on one side of the test box (1), and a cam (99) opposite to the pressure rod (910) is sleeved on the outer side of the transmission shaft (91). A driving motor (90) for driving the transmission shaft (91) is installed on the test box (1).

6. The fireproof cable combustion test box according to claim 1, characterized in that: The condenser (6) comprises a liquid storage box (60), a heat dissipation fan (61) and a condensation manifold (62); the liquid storage box (60) is fixedly arranged on the test box (1); the heat dissipation fan (61) is arranged on one side of the upper part of the liquid storage box (60); and the condensation manifold (62) is evenly arranged through the side of the liquid storage box (60) facing the heat dissipation fan (61).

7. The fireproof cable combustion test box according to claim 1, characterized in that: The air intake pipe (11) is made of a heat-conducting material, and the exhaust pipe (12) is made of a heat-insulating material.

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