Early warning device for fire in cable trench

Abstract

The invention discloses an early warning device for a fire in a cable trench, and mainly relates to the technical field of early warning devices. Comprising flame detectors arranged on a wall on one side of a cable trench, a plurality of fixing plates are arranged on the wall of the cable trench, a bottom plate is arranged between the fixing plates, a plurality of L-shaped blocks in sliding connection with the bottom plate are arranged on the fixing plates, an adjusting plate is rotationally connected to the bottom plate, and the flame detectors are arranged on the adjusting plate at the same time. The bottom plate is provided with a sliding block for driving the adjusting plate to rotate on the bottom plate and a first limiting block for limiting the bottom plate to slide on the cable trench wall. The flame detector has the beneficial effects that the problem that the flame detector cannot directly face a cable head joint is solved, and the detection range and the detection effect of the flame detector are improved.

Description

Technical Field

[0001] The invention relates to the technical field of early warning devices, in particular to an early warning device for fire in a cable trench. Background Art

[0002] Various lines are densely arranged in the cable tunnel, among which the cable joints are the weak link. Once the fault fire is not discovered and controlled in time, it will not only ignite the surrounding cables, but also cause the loss of section and large-scale power outages in serious cases, causing serious economic losses and adverse social impacts. According to previous firefighting experience, when a fire occurs in a cable trench, the golden time for fire extinguishing is only 3 minutes. In these 3 minutes, we must seize two first moments: discover the fire first and extinguish the flames first.

[0003] At present, lines and electronic equipment are arranged on one side of the cable trench, and flame detectors are installed at the cable joints on the other side to directly monitor whether there is light radiation of flame in the cable trench, so as to determine whether there is open flame. In conjunction with the smoke detector installed on the top of the cable trench, it is used to sense the concentration of smoke particles in the cable trench, so as to determine whether a short circuit occurs, and then promptly discover and extinguish the fire, avoid large-scale fire in the cable trench, and prevent a large number of cable cross-sections from being damaged, causing large-scale power outages.

[0004] However, in the installation of existing flame detectors, generally, expansion bolts are first driven into appropriate positions in the cable trench, and then suitable fixings are installed to fix the flame detector thereon. However, after fixing the flame detector by the above method, although the flame detector can theoretically detect fires in all positions of the cable trench from top to bottom, due to a certain inclination of the walls on both sides of the cable trench during the actual installation process, there is a certain range of areas at the top or bottom where fires cannot be monitored. In addition, when the position of the overall cable joint connection is offset, the expansion bolts need to be driven back and the flame detector needs to be reinstalled at the specified position. Summary of the invention

[0005] The purpose of the present invention is to provide an early warning device for fire in a cable trench, so as to solve the problem that the flame detector cannot face the cable head connection directly, and to improve the detection range and detection effect of the flame detector.

[0006] In order to achieve the above-mentioned purpose, the invention is implemented through the following technical solutions:

[0007] A fire early warning device in a cable trench comprises a flame detector arranged on a wall on one side of the cable trench, a plurality of fixed plates are arranged on the cable trench wall, a bottom plate is arranged between the fixed plates, a plurality of L-shaped blocks slidably connected to the bottom plate are arranged on the fixed plates, an adjustment plate is rotatably connected to the bottom plate, a plurality of the flame detectors are arranged on the adjustment plate at the same time, a slider for driving the adjustment plate to rotate on the bottom plate is arranged on the bottom plate, and a first limit block for limiting the bottom plate from sliding on the cable trench wall.

[0008] Furthermore, the flame detector is an ultraviolet flame monitor, which includes a shell, and an infrared monitoring module and an ultraviolet monitoring module arranged on the shell, and the adjustment plate and the bottom adapter are respectively provided with wiring terminals.

[0009] Furthermore, a plurality of mounting holes are provided on the side of the shell, and the bolts are threadedly connected to the adjustment plate after passing through the mounting holes.

[0010] Furthermore, the adjustment plate is provided with a concave block in contact with the bottom of the shell, and first protrusions are provided on both sides of the concave block. The bottom of the shell is symmetrically provided with buckles, and the left and right sides of the buckles are in contact with the concave block. A second protrusion is provided at the end of the buckle, and the upper and lower sides of the second protrusion are respectively provided with a plane and an inclined surface in contact with the first protrusion.

[0011] Furthermore, the adjustment plate is symmetrically provided with guide blocks, the concave block is slidably arranged between the two guide blocks, a plurality of grooves are provided on the guide blocks, both sides of the concave block are slidably connected with ball bearings that are snap-fitted with the grooves, a return spring is provided between the ball bearings and the concave block, a second limit block is slidably connected to the concave block, one end of the second limit block is in contact with the ball bearing, and the other end of the second limit block is in contact with the buckle.

[0012] Furthermore, a plurality of convex plates slidably connected to the L-shaped blocks are provided on both sides of the bottom plate, and the width of the convex plates is smaller than the gap between two adjacent L-shaped blocks.

[0013] Furthermore, the slider is slidably arranged on one of the convex plates, a connecting rod is provided between the slider and the adjusting plate, both ends of the connecting rod are rotatably connected to the slider and the adjusting plate respectively, one of the convex plates is rotatably connected to a screw threadedly connected to the slider, a driven wheel is provided at the end of the screw, and a rotating motor is also included to drive the driven wheel to rotate.

[0014] Furthermore, the driven wheel is provided with a plurality of first limiting grooves, a shifting groove is provided between two adjacent first limiting grooves, the movable end of the rotating motor is provided with a driving wheel, the upper and lower sides of the driving wheel are provided with arc blocks in contact with the first limiting grooves, and the left and right sides of the driving wheel are provided with shifting blocks in contact with the shifting grooves.

[0015] Furthermore, there are two first limit blocks, and the two first limit blocks are respectively slidably set on one of the L-shaped blocks, one of the convex plates is provided with a groove, and both sides of the groove are provided with second limit grooves that are snap-fitted with the first limit blocks.

[0016] Furthermore, a guide column is provided at the end of the first limit block, a turntable is rotatably connected to one of the L-shaped blocks, an arc groove is provided on the turntable which is slidably connected to the guide column, and a driving rod extending to one of the L-shaped blocks is provided on one side of the turntable.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. Set several fixing plates on the wall respectively, slide the bottom plate between the fixing plates, and drive several flame detectors to move together, so as to adjust the horizontal position of the flame detector; then drive the adjustment plate to rotate on the bottom plate through the slider, so as to drive several flame detectors on the adjustment plate to rotate together, adjust the monitoring angle of the flame detector, compensate for the processing error of the wall, so that several flame detectors face the power transmission lines and electronic components on the other side, further improve the efficiency of fire detection, avoid large-scale fire in the cable trench, and prevent a large number of cable cross-sections from being damaged, causing large-scale power outages;

[0019] 2. There is no need to re-install expansion bolts to change the horizontal position of the flame detector, which improves the efficiency of replacing several flame detectors; there is no need to adjust the angles of several flame detectors separately, which improves the efficiency of adjusting the angles of several flame detectors;

[0020] 3. The infrared monitoring module monitors 4.3um infrared light, and cooperates with the UV monitoring module's 180-260nm UVC ultraviolet light to fully filter out various interference sources such as sunlight, ambient light, lighting, and human infrared, to ensure the reliability and accuracy of flame monitoring to the greatest extent;

[0021] 4. Before fixing the ultraviolet flame monitor, the position of a certain ultraviolet flame monitor can be fine-tuned laterally through the cooperation between the concave block, the reset spring, the ball, the groove and the guide block, so that the flame detector is aligned with the cable connector connection, further improving the efficiency of detecting fire and improving the monitoring effect of the ultraviolet flame monitor;

[0022] In addition, the cooperation among the ball, the ultraviolet flame monitor, the second convex block, the inclined surface, the first convex block, the buckle, the plane, the shell, and the concave block limits the movement of the ultraviolet flame monitor up, down, left, and right, thereby fixing the ultraviolet flame monitor on the concave block; at the same time, because the two ends of the second limit block are respectively in contact with the ball and the buckle, the ball is limited from sliding on the concave block, and after the position of the ultraviolet flame monitor is fixed, it is prevented that the ultraviolet flame monitor is accidentally driven to move by external force, causing the monitoring range of the ultraviolet flame monitor to deviate from the predetermined area, thereby ensuring the monitoring stability of the ultraviolet flame monitor after installation, and improving the monitoring effect of the ultraviolet flame monitor;

[0023] 5. The driven wheel is driven to rotate on the convex plate by the cooperation among the rotating motor, the driving wheel, the arc block, the first limiting groove, the driven wheel, the convex plate, the shifting block and the shifting groove. At the same time, the monitoring angles of several flame detectors are adjusted by the cooperation among the screw, the convex plate, the slider, the screw, the connecting rod, the adjusting plate and the bottom plate to compensate for the processing error of the wall, so that several flame detectors face the power transmission lines and electronic components on the other side, avoiding the phenomenon of failure to monitor due to the existence of blind angles, thereby improving the monitoring effect of the flame detector; in addition, after each adjustment of the angle, the driven wheel is limited to rotate on the convex plate by the cooperation between the arc block and the first limiting groove, avoiding the external force from accidentally changing the monitoring angle of the flame detector, avoiding the phenomenon of failure to monitor due to the existence of blind angles, thereby improving the monitoring effect of the flame detector;

[0024] 6. When several flame detectors are moved to the specified positions, the relative sliding of the bottom plate and the L-shaped plate is limited by the cooperation among the driving rod, turntable, L-shaped block, arc groove, guide column, first limit block, second limit groove and second limit groove, so as to avoid the external force inadvertently changing the position of the flame detector after the flame detector is fixed, resulting in failure to timely monitor the fire at the cable connection, thereby improving the monitoring effect of the flame detector. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Attached Figure 1 It is a structural schematic diagram of the cable trench of the present invention.

[0026] Attached Figure 2 It is a structural schematic diagram of the ultraviolet flame monitor of the present invention.

[0027] Attached Figure 3 It is a structural schematic diagram of a slider of the present invention.

[0028] Attached Figure 4 It is a structural schematic diagram of the driven wheel of the present invention.

[0029] Attached Figure 5 It is a structural schematic diagram of the housing of the present invention.

[0030] Attached Figure 6 The present invention is attached Figure 5 A partial enlarged view of area B in the middle.

[0031] Attached Figure 7 It is a schematic diagram of the structure of the groove of the present invention.

[0032] Attached Figure 8 It is a structural schematic diagram of the base plate of the present invention.

[0033] Attached Fig. 9 The present invention is attached Figure 3 A partial enlarged view of area A in the middle.

[0034] Attached Fig.10 It is a structural schematic diagram of a turntable of the present invention.

[0035] Numbers shown in the accompanying drawings:

[0036] 1. Cable trench; 2. Fixing plate; 3. Bottom plate; 4. L-shaped block; 5. Adjustment plate; 6. Slider; 7. First limit block;

[0037] 8. Ultraviolet flame detector; 9. Shell; 10. Infrared monitoring module; 11. Ultraviolet monitoring module; 12. Wiring terminal; 13. Mounting hole;

[0038] 14. concave block; 15. first convex block; 16. buckle; 17. second convex block; 18. plane; 19. inclined surface; 20. guide block; 21. groove; 22. ball bearing; 23. return spring; 24. second limit block;

[0039] 25. convex plate; 26. connecting rod; 27. screw rod; 28. driven wheel; 29. ​​rotating motor; 30. first limiting groove; 31. shifting groove; 32. driving wheel; 33. arc block; 34. shifting block;

[0040] 35. Groove; 36. Second limiting groove; 37. Guide column; 38. Turntable; 39. Arc groove; 40. Driving rod. DETAILED DESCRIPTION

[0041] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the application equally.

[0042] The present invention provides a fire early warning device in a cable trench, such as Figure 1 , Figure 2 and Fig. 9As shown, it includes a flame detector arranged on the wall of one side of the cable trench 1. Specifically, one side of the cable is arranged with lines and electronic equipment, and the other side is provided with a flame detector at the cable joint connection, which is used to monitor whether there is light radiation of flame in the cable trench 1, judge whether there is open flame at the cable joint connection, and then timely discover the fire, extinguish the fire in time, avoid large-scale fire in the cable trench 1, prevent a large number of cable cross-section parts from being damaged, and cause large-scale power outages; a plurality of fixing plates 2 are arranged on the wall of the cable trench 1, and the fixing plates 2 are fixed to the wall by expansion bolts, and a bottom plate 3 is arranged between the fixing plates 2. The plate 2 is provided with a plurality of L-shaped blocks 4 which are slidably connected with the bottom plate 3. The bottom plate 3 is guided by the L-shaped blocks 4 to limit the vertical upward and downward movement of the bottom plate 3 on the wall, so as to avoid driving a plurality of flame detectors arranged on the adjustment plate 5 to move up and down, thereby affecting the detection range of the flame detector and avoiding the occurrence of the phenomenon that the flame detector cannot be detected due to the existence of blind spots, thereby timely discovering the fire and extinguishing the fire, avoiding the occurrence of large-scale fire in the cable trench 1, and preventing a large number of cable cross-sections from being damaged and causing large-scale power outages; in addition, the bottom plate 3 slides between the fixed plates 2, and at the same time drives a plurality of flame detectors to move together, thereby adjusting the flame detection The horizontal position of the flame detector makes the flame detector align with the cable joint connection, further improving the efficiency of detecting fire, avoiding large-scale fire in the cable trench 1, and preventing a large number of cable cross-section parts from being damaged, causing large-scale power outages; in addition, there is no need to change the horizontal position of the flame detector by re-drilling expansion bolts, thereby improving the efficiency of replacing several flame detectors; the bottom plate 3 is rotatably connected with an adjustment plate 5, and several flame detectors are simultaneously arranged on the adjustment plate 5. The bottom plate 3 is provided with a slider 6 for driving the adjustment plate 5 to rotate on the bottom plate 3, and a first The limit block 7 drives the adjustment plate 5 to rotate on the bottom plate 3 through the slider 6, thereby driving the several flame detectors on the adjustment plate 5 to rotate together, adjusting the monitoring angle of the flame detector, compensating for the processing error of the wall, so that the several flame detectors face the power transmission lines and electronic components on the other side, avoiding the phenomenon of no monitoring due to the existence of blind spots, and then timely discovering and extinguishing the fire, avoiding large-scale fire in the cable trench 1, and preventing a large number of cable cross-sections from being partially damaged, causing large-scale power outages; in addition, there is no need to adjust the angles of several flame detectors separately, which improves the efficiency of adjusting the angles of several flame detectors.

[0043] Preferably, Figure 5As shown, the flame detector is an ultraviolet flame monitor 8, which includes a shell 9, and an infrared monitoring module 10 and an ultraviolet monitoring module 11 arranged on the shell 9. The infrared monitoring module 10 monitors 4.3um infrared light, and cooperates with the ultraviolet monitoring module 11180-260nm UVC ultraviolet light to fully filter various interference sources such as sunlight, ambient light, light, human infrared, etc., to maximize the reliability and accuracy of flame monitoring; the adjustment plate 5 and the adapter at the bottom are respectively provided with wiring terminals 12, and the plug-in wiring terminals 12 of the KF2EDGK model can be specifically referred to, which is convenient for arranging the circuit of the ultraviolet flame monitor 8 and avoiding the adjustment plate 5 from pressing the circuit during rotation.

[0044] Preferably, Figure 3 As shown, a plurality of mounting holes 13 are provided on the side of the housing 9. The bolts pass through the mounting holes 13 and are threadedly connected to the adjustment plate 5, thereby realizing a detachable connection of the flame detector on the adjustment plate 5, which is convenient for subsequent replacement of the flame detector.

[0045] Preferably, Figure 5 and Figure 6 As shown, the adjusting plate 5 is provided with a concave block 14 in contact with the bottom of the shell 9, and first protrusions 15 are provided on both sides of the concave block 14. A buckle 16 is symmetrically provided at the bottom of the shell 9, and the left and right sides of the buckle 16 are in contact with the concave block 14. A second bump 17 is provided at the end of the buckle 16, and the upper and lower sides of the second bump 17 are respectively provided with a plane 18 and an inclined surface 19 in contact with the first bump 15. After the ultraviolet flame monitor 8 is placed on the concave block 14, the inclined surface 19 provided on the lower side of the second bump 17 contacts the first bump 15, and the component force generated drives the buckle 16 to bend and deform until the buckle 16 completely passes through the first bump 15, and then the buckle 16 is restored, so that the plane 18 provided on the upper side of the buckle 16 contacts the first bump 15; at the same time, because the bottom of the shell 9 contacts the top of the concave block 14, and the buckle The left and right sides of the buckle 16 are in contact with the concave block 14, limiting the up, down, left and right movement of the ultraviolet flame monitor 8, thereby fixing the ultraviolet flame monitor 8 on the concave block 14. When the ultraviolet flame monitor 8 needs to be removed, it is only necessary to apply external force to move the ultraviolet flame monitor 8 to one side, so that one of the buckles 16 contacts the concave block 14 and bends and deforms, so that the second protrusion 17 on the other side of the buckle 16 is no longer in contact with the first protrusion 15, and then the ultraviolet flame monitor 8 is bent upward to disengage the buckle 16 on the other side from the concave block 14, and finally the ultraviolet flame monitor 8 is moved to the other side to disengage one of the buckles 16 from the concave block 14, thereby releasing the fixation of the ultraviolet flame monitor 8 on the adjustment plate 5, thereby simplifying the operating steps of installing and disassembling the ultraviolet flame monitor 8 and improving the efficiency of installing and disassembling the ultraviolet flame monitor 8.

[0046] Preferably, Figure 5 , Figure 6 and Figure 7 As shown, the adjusting plate 5 is symmetrically provided with guide blocks 20, the concave block 14 is slidably arranged between the two guide blocks 20, the guide block 20 is provided with a plurality of grooves 21, the two sides of the concave block 14 are respectively slidably connected with balls 22 engaged with the grooves 21, a return spring 23 is provided between the ball 22 and the concave block 14, a second limit block 24 is slidably connected to the concave block 14, one end of the second limit block 24 contacts with the ball 22, and the other end of the second limit block 24 contacts with the buckle 16, before fixing the ultraviolet flame monitor 8, an external force is applied to the concave block 14 to offset the resistance generated by the compression of the return spring 23, and the side of the ball 22 contacts with the groove 21, and the component force generated drives the ball 22 to move inward, further compressing the return spring 23, so that the concave block 14 is in the guide block 20 16, thereby fine-tuning the position of a certain ultraviolet flame monitor 8 laterally so that the flame detector is aligned with the cable connector connection, further improving the efficiency of detecting fire and improving the monitoring effect of the ultraviolet flame monitor 8; after the ultraviolet flame monitor 8 is installed, since the two ends of the second limit block 24 are respectively in contact with the ball 22 and the buckle 16, the ball 22 is restricted from sliding on the concave block 14. At this time, if an external force is applied to the ultraviolet flame monitor 8, the component force generated will not be able to drive the ball 22 to slide inward, causing the concave block 14 to slide relative to the guide block 20, avoiding the ultraviolet flame monitor 8 from being accidentally driven to move by the external force after the position of the ultraviolet flame monitor 8 is fixed, causing the monitoring range of the ultraviolet flame monitor 8 to deviate from the predetermined area, thereby ensuring the monitoring stability of the ultraviolet flame monitor 8 after installation and improving the monitoring effect of the ultraviolet flame monitor.

[0047] Preferably, Figure 8 As shown, a plurality of protruding plates 25 slidably connected to the L-shaped blocks 4 are provided on both sides of the base plate 3, and the width of the protruding plates 25 is smaller than the gap between two adjacent L-shaped blocks 4. When the base plate 3 is placed, the protruding plates 25 can be inserted from the gap between the two L-shaped blocks 4 without sliding in from both ends, thereby simplifying the operation steps of installing the base plate 3 and improving the efficiency of installing the flame detector.

[0048] Preferably, Figure 3As shown, the slider 6 is slidably arranged on one of the convex plates 25, and a connecting rod 26 is provided between the slider 6 and the adjusting plate 5, and the two ends of the connecting rod 26 are rotatably connected to the slider 6 and the adjusting plate 5 respectively. A screw 27 threadedly connected to the slider 6 is rotatably connected on one of the convex plates 25, and a driven wheel 28 is provided at the end of the screw 27, and a rotating motor 29 for driving the driven wheel 28 to rotate is also included. The driven wheel 28 is driven to rotate by the rotating motor 29, and the screw 27 is driven to rotate on the convex plate 25. Since the slider 6 is threadedly connected to the screw 27, the slider 6 is driven to slide on the convex plate 25. Since the two ends of the connecting rod 26 are rotatably connected to the slider 6 and the adjusting plate 5 respectively, the component force generated drives the adjusting plate 5 to rotate on the bottom plate 3, and then drives the several flame detectors on the adjusting plate 5 to rotate together, adjust the monitoring angle of the flame detector, and compensate for the processing error of the wall, so that the several flame detectors are facing the power transmission lines and electronic components on the other side, avoiding the phenomenon of no monitoring due to the existence of dead angles, thereby improving the monitoring effect of the flame detector.

[0049] Preferably, Figure 3 and Figure 4 As shown, the driven wheel 28 is provided with a plurality of first limiting grooves 30, and a shifting groove 31 is provided between two adjacent first limiting grooves 30. The movable end of the rotating motor 29 is provided with a driving wheel 32, and arc blocks 33 in contact with the first limiting grooves 30 are provided on the upper and lower sides of the driving wheel 32, and shifting blocks 34 in contact with the shifting grooves 31 are provided on the left and right sides of the driving wheel 32. The rotating motor 29 drives the driving wheel 32 to rotate, so that the arc blocks 33 provided on the upper and lower sides of the driving wheel 32 move to the left and right sides. At this time, the arc blocks 33 slide out of the first limiting grooves 30, and the restriction on the rotation of the driven wheel 28 on the convex plate 25 is released; at the same time, the shifting blocks 34 on the left and right sides move to the upper and lower sides, and through the shifting blocks 34 and the shifting grooves 31 is in contact with each other, driving the driven wheel 28 to rotate on the convex plate 25, thereby adjusting the monitoring angles of several flame detectors and compensating for the processing error of the wall, so that several flame detectors face the power transmission lines and electronic components on the other side, avoiding the phenomenon of no detection due to the existence of blind spots, thereby improving the monitoring effect of the flame detector; in addition, after each angle adjustment, the arc block 33 will be disassembled and returned to the first limiting groove 30, and the resistance generated by the contact between the side of the arc block 33 and the first limiting groove 30 is used to limit the rotation of the driven wheel 28 on the convex plate 25, thereby avoiding the external force from accidentally changing the monitoring angle of the flame detector, avoiding the phenomenon of no detection due to the existence of blind spots, thereby improving the monitoring effect of the flame detector.

[0050] Preferably, Fig. 9 and Fig.10As shown, there are two first limit blocks 7, and the two first limit blocks 7 are respectively slidably set on one of the L-shaped blocks 4. One of the convex plates 25 is provided with a groove 35 to prevent the first limit block 7 from interfering with the convex plate 25, so that the bottom plate 3 and the L-shaped plate can slide relative to each other, thereby adjusting the position monitored by the flame detector and improving the monitoring effect of the flame detector; second limit grooves 36 that are snap-fitted with the first limit block 7 are provided on both sides of the groove 35 to limit the relative sliding of the bottom plate 3 and the L-shaped plate, so as to prevent the external force from inadvertently changing the position of the flame detector after the flame detector is fixed, resulting in failure to timely monitor the fire at the cable connection, thereby improving the monitoring effect of the flame detector.

[0051] Preferably, Fig. 9 and Fig.10 As shown, a guide column 37 is provided at the end of the first limit block 7, and a turntable 38 is rotatably connected to one of the L-shaped blocks 4. The turntable 38 is provided with an arc groove 39 slidably connected to the guide column 37, and a driving rod 40 extending to one of the L-shaped blocks 4 is provided on one side of the turntable 38. The drive rod 40 extending to the outside is rotated to drive the turntable 38 to rotate on the L-shaped block 4, and contacts with the guide column 37 through the arc groove 39. The component force generated drives the first limit block 7 to slide toward both sides on the L-shaped block 4 and slide into the second limit groove 36. Resistance is generated after the side of the first limit block 7 contacts with the second limit groove 36, thereby limiting the relative sliding of the bottom plate 3 and the L-shaped plate, thereby preventing the external force from inadvertently changing the position of the flame detector after the flame detector is fixed, resulting in failure to timely monitor the fire at the cable connection, thereby improving the monitoring effect of the flame detector.

[0052] Example 1

[0053] The present invention provides a fire early warning device in a cable trench, such as Figure 1 , Figure 2 and Fig. 9 As shown, a plurality of fixing plates 2 are fixed to the wall by expansion bolts on one side of the wall of the cable trench 1, and the bottom plate 3 is guided by the L-shaped block 4 provided on the fixing plate 2 to limit the bottom plate 3 from moving vertically up and down on the wall; in addition, the bottom plate 3 slides between the fixing plates 2, and at the same time drives a plurality of flame detectors to move together, so as to adjust the horizontal position of the flame detector; then, the adjusting plate 5 is driven to rotate on the bottom plate 3 by the slider 6, so as to drive a plurality of flame detectors on the adjusting plate 5 to rotate together, and adjust the monitoring angle of the flame detector, and compensate for the processing error of the wall, so that a plurality of flame detectors face the power transmission lines and electronic components on the other side, so as to further improve the efficiency of detecting fire, avoid large-scale fire in the cable trench 1, and prevent a large number of cable cross-sections from being partially damaged, causing large-scale power outages;

[0054] In addition, there is no need to change the lateral position of the flame detector by re-inserting the expansion bolts, thereby improving the efficiency of replacing several flame detectors; there is also no need to adjust the angles of several flame detectors separately, thereby improving the efficiency of adjusting the angles of several flame detectors.

[0055] Example 2

[0056] On the basis of Example 1, Figure 3 and Figure 5 As shown, after the ultraviolet flame monitor 8 is fixed, the circuits of several ultraviolet flame monitors 8 are arranged together and connected to the wiring terminals 12 on the adjustment plate 5, and then the wiring terminals 12 on the adjustment plate 5 and the wiring terminals 12 on the bottom plate 3 are connected by using the wiring, and the corresponding control circuits of the control center are connected to the wiring terminals 12 on the bottom plate 3, so as to realize the connection between several ultraviolet flame monitors 8 and the control center circuit, and avoid the adjustment plate 5 and the bottom plate 3 from pressing the circuit during the subsequent rotation of the adjustment plate 5, thereby ensuring the stability of the connection between several ultraviolet flame monitors 8 and the control center; in addition, several ultraviolet flame monitors 8 can be pre-installed on the adjustment plate 5 outside the cable trench 1, and there is no need to install the ultraviolet flame monitor 8 in a relatively small and poorly illuminated space, thereby improving the installation efficiency of the ultraviolet flame monitor 8;

[0057] In addition, the infrared monitoring module 10 monitors 4.3um infrared light, and cooperates with the UVC ultraviolet light of the ultraviolet monitoring module 11180~260nm to fully filter various interference sources such as sunlight, ambient light, lighting, human infrared, etc., to ensure the reliability and accuracy of flame monitoring to the greatest extent.

[0058] Example 3

[0059] On the basis of Example 1, Figure 5 , Figure 6 and Figure 7 As shown, before fixing the ultraviolet flame monitor 8, an external force is applied to the concave block 14 to offset the resistance generated by the compression of the return spring 23, and the side of the ball 22 contacts the groove 21, and the component force generated drives the ball 22 to move inward, further compressing the return spring 23, so that the concave block 14 slides between the guide blocks 20, thereby fine-tuning the position of a certain ultraviolet flame monitor 8 laterally, so that the flame detector is aligned with the cable connector connection, further improving the efficiency of detecting fire and improving the monitoring effect of the ultraviolet flame monitor 8;

[0060] Move the ball 22 into the corresponding groove 35, and after adjusting the ultraviolet flame monitor 8, the inclined surface 19 provided on the lower side of the second protrusion 17 contacts the first protrusion 15, and the component force generated drives the buckle 16 to bend and deform until the buckle 16 completely passes through the first protrusion 15, and then the buckle 16 recovers, so that the plane 18 provided on the upper side of the buckle 16 contacts the first protrusion 15; at the same time, because the bottom of the shell 9 contacts the top of the concave block 14, and the left and right sides of the buckle 16 contact the concave block 14, the ultraviolet flame monitor 8 is restricted from moving up and down and left and right, so that the ultraviolet flame monitor 8 is fixed on the concave block 1 4; at the same time, since the two ends of the second limit block 24 are in contact with the ball 22 and the buckle 16 respectively, the ball 22 is restricted from sliding on the concave block 14. At this time, if an external force is applied to the ultraviolet flame monitor 8, the generated component force will not be able to drive the ball 22 to slide inward, so that the concave block 14 slides relative to the guide block 20, avoiding that after the position of the ultraviolet flame monitor 8 is fixed, the external force accidentally drives the ultraviolet flame monitor 8 to move, causing the monitoring range of the ultraviolet flame monitor 8 to deviate from the predetermined area, thereby ensuring the monitoring stability of the ultraviolet flame monitor 8 after installation and improving the monitoring effect of the ultraviolet flame monitor.

[0061] When the ultraviolet flame monitor 8 needs to be removed, it is only necessary to apply external force to move the ultraviolet flame monitor 8 to one side so that one of the buckles 16 contacts the concave block 14 and bends and deforms, so that the second protrusion 17 on the other side of the buckle 16 no longer contacts the first protrusion 15, and then bend the ultraviolet flame monitor 8 upward so that the buckle 16 on the other side is disengaged from the concave block 14, and finally move the ultraviolet flame monitor 8 to the other side and disengage one of the buckles 16 from the concave block 14, thereby releasing the fixation of the ultraviolet flame monitor 8 on the adjustment plate 5, thereby simplifying the operating steps of installing and disassembling the ultraviolet flame monitor 8 and improving the efficiency of installing and disassembling the ultraviolet flame monitor 8.

[0062] Example 4

[0063] On the basis of Example 1, Figure 3 and Figure 4As shown, the driving wheel 32 is driven to rotate by the rotating motor 29, so that the arc blocks 33 provided on the upper and lower sides of the driving wheel 32 move to the left and right sides. At this time, the arc blocks 33 slide out of the first limiting groove 30, and the restriction on the rotation of the driven wheel 28 on the convex plate 25 is released; at the same time, the shifting blocks 34 on the left and right sides move to the upper and lower sides, and contact the shifting grooves 31 through the shifting blocks 34, driving the driven wheel 28 to rotate on the convex plate 25, driving the screw rod 27 to rotate on the convex plate 25, and since the slider 6 is threadedly connected with the screw 27, the slider 6 is driven to slide on the convex plate 25, and since the two ends of the connecting rod 26 are respectively connected to the slider 6 and the adjusting plate 5 for rotation, the component force generated drives the adjusting plate 5 to rotate on the bottom plate 3, thereby adjusting the monitoring angles of several flame detectors, compensating for the processing error of the wall, so that several flame detectors face the power transmission lines and electronic components on the other side, avoiding the phenomenon of not being able to be monitored due to the existence of blind spots, and thus improving the monitoring effect of the flame detector; in addition, after each adjustment of the angle, the arc block 33 will be disassembled and returned to the first limiting groove 30, and the resistance generated by the contact between the side surface of the arc block 33 and the first limiting groove 30 is used to limit the rotation of the driven wheel 28 on the convex plate 25, thereby avoiding the external force from accidentally changing the monitoring angle of the flame detector, avoiding the phenomenon of not being able to be monitored due to the existence of blind spots, and thus improving the monitoring effect of the flame detector.

[0064] Example 5

[0065] On the basis of Example 1, Figure 8 , Fig. 9 and Fig.10 As shown, when placing the bottom plate 3, since the width of the protruding plate 25 is smaller than the gap between two adjacent L-shaped blocks 4, the protruding plate 25 can be inserted from the gap between the two L-shaped blocks 4 without sliding in from both ends, thereby simplifying the operation steps of installing the bottom plate 3 and improving the efficiency of installing the flame detector;

[0066] Since the first limit block 7 is in the rotating disk 38 in the initial state, the notch provided on the convex plate 25 prevents the rotating disk 38 and the convex plate 25 from interfering with each other, so that the bottom plate 3 and the L-shaped plate can slide relative to each other, thereby adjusting the position monitored by the flame detector and improving the monitoring effect of the flame detector;

[0067] When several flame detectors move to the specified positions, the drive rod 40 extending to the outside is rotated to drive the turntable 38 to rotate on the L-shaped block 4, and contacts the guide column 37 through the arc groove 39. The component force generated drives the first limit block 7 to slide on both sides of the L-shaped block 4 and slide into the second limit groove 36. The side of the first limit block 7 contacts the second limit groove 36 to generate resistance, which limits the relative sliding of the bottom plate 3 and the L-shaped plate, so as to avoid the external force from accidentally changing the position of the flame detector after the flame detector is fixed, resulting in failure to timely monitor the fire at the cable connection, thereby improving the monitoring effect of the flame detector.

Claims

1. A fire early warning device in a cable trench, comprising a flame detector arranged on a wall on one side of the cable trench (1), characterized in that: A plurality of fixed plates (2) are provided on the wall of the cable trench (1), a bottom plate (3) is provided between the fixed plates (2), a plurality of L-shaped blocks (4) slidably connected to the bottom plate (3) are provided on the fixed plates (2), an adjustment plate (5) is rotatably connected to the bottom plate (3), a plurality of flame detectors are simultaneously arranged on the adjustment plate (5), a slider (6) for driving the adjustment plate (5) to rotate on the bottom plate (3), and a first limit block (7) for limiting the bottom plate (3) from sliding on the wall of the cable trench (1).

2. The cable trench fire early warning device according to claim 1, characterized in that: The flame detector is an ultraviolet flame monitor (8), which comprises a housing (9), an infrared monitoring module (10) and an ultraviolet monitoring module (11) arranged on the housing (9), and the adjustment plate (5) and the transition point at the bottom are respectively provided with connection terminals (12).

3. The cable trench fire early warning device according to claim 2, characterized in that: The side surface of the housing (9) is provided with a plurality of mounting holes (13), and the bolts are threadedly connected to the adjustment plate (5) after passing through the mounting holes (13).

4. The cable trench fire early warning device according to claim 2, characterized in that: The adjusting plate (5) is provided with a concave block (14) in contact with the bottom of the shell (9), and first convex blocks (15) are provided on both sides of the concave block (14). The bottom of the shell (9) is symmetrically provided with a buckle (16), and the left and right sides of the buckle (16) are in contact with the concave block (14). The end of the buckle (16) is provided with a second convex block (17), and the upper and lower sides of the second convex block (17) are respectively provided with a plane (18) and an inclined surface (19) in contact with the first convex block (15).

5. The cable trench fire early warning device according to claim 4, characterized in that: The adjusting plate (5) is symmetrically provided with guide blocks (20), the concave block (14) is slidably arranged between the two guide blocks (20), the guide block (20) is provided with a plurality of grooves (21), both sides of the concave block (14) are slidably connected with balls (22) that are snap-fitted with the grooves (21), a return spring (23) is provided between the balls (22) and the concave block (14), and a second limiting block (24) is slidably connected to the concave block (14), one end of the second limiting block (24) is in contact with the ball (22), and the other end of the second limiting block (24) is in contact with the buckle (16).

6. The cable trench fire early warning device according to claim 1, characterized in that: A plurality of convex plates (25) slidably connected to the L-shaped blocks (4) are provided on both sides of the bottom plate (3); the width of the convex plates (25) is smaller than the gap between two adjacent L-shaped blocks (4).

7. The cable trench fire early warning device according to claim 6, characterized in that: The slider (6) is slidably arranged on one of the convex plates (25); a connecting rod (26) is provided between the slider (6) and the adjustment plate (5); the two ends of the connecting rod (26) are rotatably connected to the slider (6) and the adjustment plate (5); a screw (27) threadedly connected to the slider (6) is rotatably connected to one of the convex plates (25); a driven wheel (28) is provided at the end of the screw (27); and a rotary motor (29) is further provided for driving the driven wheel (28) to rotate.

8. The cable trench fire early warning device according to claim 7, characterized in that: The driven wheel (28) is provided with a plurality of first limiting grooves (30), a shifting groove (31) is provided between two adjacent first limiting grooves (30), a driving wheel (32) is provided at the movable end of the rotating motor (29), arc-shaped blocks (33) in contact with the first limiting grooves (30) are provided on the upper and lower sides of the driving wheel (32), and shifting blocks (34) in contact with the shifting grooves (31) are provided on the left and right sides of the driving wheel (32).

9. The cable trench fire early warning device according to claim 1, characterized in that: There are two first limiting blocks (7), and the two first limiting blocks (7) are respectively slidably arranged on one of the L-shaped blocks (4). One of the convex plates (25) is provided with a groove (35), and both sides of the groove (35) are provided with second limiting grooves (36) that are engaged with the first limiting block (7).

10. The cable trench fire early warning device according to claim 9, characterized in that: A guide post (37) is provided at the end of the first limit block (7), a turntable (38) is rotatably connected to one of the L-shaped blocks (4), an arc-shaped groove (39) is provided on the turntable (38) and is slidably connected to the guide post (37), and a driving rod (40) is provided on one side of the turntable (38) and extends to one of the L-shaped blocks (4).

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