Three-section synchronous telescopic double-channel fire rescue boom

Abstract

The invention relates to a three-section synchronous telescopic double-channel fire rescue boom, and belongs to the technical field of fire rescue booms. Comprising a suspension arm and a telescopic ladder assembly, the suspension arm comprises a basic arm, a first-stage telescopic arm and a second-stage telescopic arm which are sequentially connected in a sliding and inserted mode, a telescopic assembly is arranged in the basic arm, and the suspension arm is driven to stretch out and draw back through the telescopic assembly; the telescopic ladder assembly comprises a left ladder assembly and a right ladder assembly which are symmetrically arranged, each of the left ladder assembly and the right ladder assembly comprises a basic ladder assembly, a first-stage ladder assembly and a second-stage ladder assembly which are sequentially and slidably connected in an inserted mode, the basic ladder assemblies are fixedly connected with the basic arm, the first-stage ladder assemblies are fixedly connected with the first-stage telescopic arm, and the second-stage ladder assemblies are fixedly connected with the second-stage telescopic arm. The second-stage ladder frame is fixedly connected with the second-stage telescopic arm; the problems that an existing fire rescue arm support is low in unfolding and folding speed, and the rescue channel space is limited are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of fire rescue booms, and in particular relates to a three-section synchronous telescopic dual-channel fire rescue boom. Background Art

[0002] Fire rescue boom is the core device of fire trucks. The speed of its key components, the boom and ladder, to be deployed and retracted directly affects the rescue efficiency on site. The existing fire rescue booms in the domestic market currently have the following problems: (1) The fire rescue boom is telescopic in a step-by-step manner, with a single cylinder controlling a single boom section, and the boom is extended and retracted in sequence, resulting in a long rescue preparation time; (2) Fire rescue ladders can be used by firefighters and trapped persons to escape from the fire scene, but single-channel fire ladders have low rescue efficiency. Summary of the invention

[0003] The present invention overcomes the deficiencies of the prior art and provides a three-section synchronous telescopic dual-channel fire rescue boom, which solves the problems of slow extension and retraction speed of the current fire rescue boom and limited rescue channel space.

[0004] In order to achieve the above object, the present invention is implemented through the following technical solutions.

[0005] A three-section synchronous telescopic dual-channel fire rescue boom, including a boom and a telescopic ladder frame, the boom including a basic arm, a first-level telescopic arm, and a second-level telescopic arm that are slidably plugged in sequence, a telescopic assembly is arranged inside the basic arm, and the boom is driven to be telescopic by the telescopic assembly; the telescopic ladder frame includes a left ladder frame and a right ladder frame that are symmetrically arranged, the left ladder frame and the right ladder frame both include a basic ladder frame, a first-level ladder frame, and a second-level ladder frame that are slidably plugged in sequence, the basic ladder frames are fixedly connected to the basic arm, the first-level ladder frames are fixedly connected to the first-level telescopic arm, and the second-level ladder frames are fixedly connected to the second-level telescopic arm.

[0006] Furthermore, the rear end of the first-stage telescopic arm is slidably inserted into the front end opening of the basic arm, and the rear end of the second-stage telescopic arm is slidably inserted into the front end opening of the first-stage telescopic arm; an upper slider is fixedly arranged on the top surface inside the basic arm, side sliders are fixedly arranged on both sides inside the basic arm, and a lower slider is fixedly arranged on the bottom surface inside the basic arm, and the upper slider, side slider and lower slider inside the basic arm are in sliding contact with the outer side surface of the first-stage telescopic arm; an upper slider is fixedly arranged on the top surface inside the first-stage telescopic arm, side sliders are fixedly arranged on both sides inside the first-stage telescopic arm, and a lower slider is fixedly arranged on the bottom surface inside the first-stage telescopic arm, and the upper slider, side slider and lower slider inside the first-stage telescopic arm are in sliding contact with the outer side surface of the second-stage telescopic arm.

[0007] Furthermore, the telescopic assembly includes a telescopic cylinder; the telescopic cylinder is inserted into the inside of the secondary telescopic arm, one end of the piston rod of the telescopic cylinder is hinged to the inner wall of the basic arm, and the cylinder body of the telescopic cylinder is hinged to the inner wall of the secondary and primary telescopic arms.

[0008] Furthermore, the telescopic assembly also includes an extension pulley and an extension wire rope; an extension pulley is rotatably arranged at one end of the bottom of the telescopic cylinder, one end of the extension wire rope is fixedly arranged inside the rear end opening of the basic arm, and the other end of the extension wire rope is fixedly connected to the rear end opening of the secondary telescopic arm after passing around the extension pulley.

[0009] Furthermore, the telescopic assembly also includes a retracting pulley and a retracting wire rope; a retracting pulley is rotatably arranged on the inner wall of the rear end opening of the first telescopic arm, one end of the retracting wire rope is fixedly connected to the rear end opening of the second telescopic arm, and the other end of the retracting wire rope is fixedly connected to the front end opening of the basic arm after passing around the retracting pulley.

[0010] Furthermore, the basic ladder frame, the first-level ladder frame and the second-level ladder frame have the same structure, and all include fixed frames symmetrically arranged on left and right sides and a plurality of climbing rods fixed between the fixed frames on both sides; the fixed frames are U-shaped plate structures, and the U-shaped openings of the fixed frames on the left and right sides face each other; a plurality of climbing rods are evenly arranged along the length direction of the fixed frames, the climbing rods are kept perpendicular to the fixed frames on both sides, and the two ends of the climbing rods are fixedly connected to the fixed frames on both sides; the fixed frames on both sides of the first-level ladder frame are respectively slidably inserted into the fixed frames on both sides of the basic ladder frame, and the fixed frames on both sides of the second-level ladder frame are respectively slidably inserted into the fixed frames on both sides of the first-level ladder frame.

[0011] Furthermore, a row of equidistant guide blocks are respectively fixedly arranged at the corners of the lower inner ends of the two fixed frames of the basic ladder frame, and a guide groove is respectively arranged at the side edges of the lower end surfaces of the two fixed frames of the first-level ladder frame that are away from each other, and the two guide grooves of the first-level ladder frame maintain sliding contact with the two rows of guide blocks of the basic ladder frame; a row of equidistant guide blocks are respectively fixedly arranged at the corners of the lower inner ends of the two fixed frames of the first-level ladder frame, and a guide groove is respectively arranged at the side edges of the lower end surfaces of the two fixed frames of the second-level ladder frame, and the two guide grooves of the second-level ladder frame maintain sliding contact with the two rows of guide blocks of the first-level ladder frame.

[0012] Furthermore, a reinforcing plate is fixedly installed at the front end surface of the two fixed frames of the basic ladder frame, a guide seat is fixedly installed on each reinforcing plate, and a guide wheel is rotatably installed inside each guide seat. The two guide wheels are in rolling contact with the end surfaces of the two fixed frames of the primary ladder frame that are away from each other.

[0013] Furthermore, three basic ladder frame connecting rods are fixedly arranged between the basic ladder frame of the left ladder frame and the basic ladder frame of the right ladder frame, and the two ends of the three basic ladder frame connecting rods are respectively fixedly arranged between the front end, middle end and rear end of the lower end surfaces of the left and right basic ladder frames; a first-level ladder frame connecting rod is fixedly arranged between the first-level ladder frame of the left ladder frame and the first-level ladder frame of the right ladder frame, and the two ends of the first-level ladder frame connecting rod are respectively fixedly arranged between the lower end surfaces of the front ends of the left and right first-level ladder frames; a second-level ladder frame connecting rod is fixedly arranged between the second-level ladder frame of the left ladder frame and the second-level ladder frame of the right ladder frame, and the two ends of the second-level ladder frame connecting rod are respectively fixedly arranged between the lower end surfaces of the front ends of the left and right second-level ladder frames.

[0014] Furthermore, two left-right symmetrical connecting seats are fixedly provided in the middle of the upper end surfaces of the basic ladder frame connecting rod, the first-level ladder frame connecting rod and the second-level ladder frame connecting rod. The two connecting seats on the three basic ladder frame connecting rods are respectively fixedly connected to the front, middle and rear ends of the left and right outer side surfaces of the basic arm, the two connecting seats on the first-level ladder frame connecting rod are respectively fixedly connected to the front ends of the left and right outer side surfaces of the first-level telescopic arm, and the two connecting seats on the second-level ladder frame connecting rod are respectively fixedly connected to the front ends of the left and right outer side surfaces of the second-level telescopic arm.

[0015] The beneficial effects of the present invention compared with the prior art are as follows: The present invention provides a three-section synchronous telescopic dual-channel fire rescue boom, which solves the problem of low efficiency of fire rescue in old urban communities. The fire rescue ladder adopts a three-section arm synchronous telescopic structure, which has a fast extension and retraction speed compared to the step-by-step telescopic method, saving rescue preparation time; the dual-channel ladder doubles the rescue channel, improves the rescue efficiency, and basically meets the rescue needs in the community. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings: Figure 1 It is a schematic diagram of the structure of the present invention in an unfolded state; Figure 2 is a schematic diagram of the structure of the present invention in a folded state; Figure 3 It is a schematic diagram of the structure after the boom is cut; Figure 4 is the front view of the basic wall; Figure 5 It is a schematic diagram of the telescopic principle of the boom; Figure 6 It is a schematic diagram of the structure of the ladder frame on the right side; Figure 7 yes Figure 6 A local enlarged schematic diagram of the middle A; Figure 8It is a schematic diagram of the connection between the left ladder frame, the right ladder frame and the boom; Among them, 1 is the boom, 2 is the left ladder frame, 3 is the right ladder frame, 4 is the basic arm, 5 is the first-level telescopic arm, 6 is the second-level telescopic arm, 7 is the basic ladder frame, 8 is the first-level ladder frame, 9 is the second-level ladder frame, 10 is the upper slider, 11 is the side slider, 12 is the lower slider, 13 is the telescopic cylinder, 14 is the extending pulley, 15 is the extending wire rope, 16 is the retracting pulley, 17 is the retracting wire rope, 18 is the fixed frame, 19 is the climbing pole, 20 is the guide block, 21 is the reinforcement plate, 22 is the guide wheel, 23 is the basic ladder frame connecting rod, 24 is the first-level ladder frame connecting rod, 25 is the second-level ladder frame connecting rod, 26 is the connecting seat, and 27 is the guardrail. DETAILED DESCRIPTION

[0017] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention is further described in detail in conjunction with the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. The technical solutions of the present invention are described in detail below in conjunction with the embodiments and the accompanying drawings, but the scope of protection is not limited thereto.

[0018] like Figure 1 As shown in FIG8 , the present invention provides a three-section synchronous telescopic dual-channel fire rescue boom, comprising a boom 1 and a telescopic ladder frame, the boom 1 comprising a basic arm 4, a first-level telescopic arm 5, and a second-level telescopic arm 6 which are slidably connected in sequence, a telescopic assembly is arranged inside the basic arm 4, and the boom 1 is driven to be telescopic by the telescopic assembly; the telescopic ladder frame comprises a symmetrically arranged left ladder frame 2 and a right ladder frame 3, the left ladder frame 2 and the right ladder frame 3 both comprise a basic ladder frame 7, a first-level ladder frame 8, and a second-level ladder frame 9 which are slidably connected in sequence, the basic ladder frame 7 is fixedly connected to the basic arm 4, the first-level ladder frame 8 is fixedly connected to the first-level telescopic arm 5, and the second-level ladder frame 9 is fixedly connected to the second-level telescopic arm 6.

[0019] The cross-sections of the basic arm 4, the primary telescopic arm 5, and the secondary telescopic arm 6 all adopt an "octagonal" structure, and both ends of the basic arm 4, the primary telescopic arm 5, and the secondary telescopic arm 6 remain open. The rear end of the primary telescopic arm 5 is slidably plugged into the front end opening of the basic arm 4, and the rear end of the secondary telescopic arm 6 is slidably plugged into the front end opening of the primary telescopic arm 5.

[0020] An upper slider 10 is fixedly arranged on the top surface inside the basic arm 4, side sliders 11 are fixedly arranged on both sides inside the basic arm 4, and a lower slider 12 is fixedly arranged on the bottom surface inside the basic arm 4. The upper slider 10, side slider 11 and lower slider 12 inside the basic arm 4 are in sliding contact with the outer surface of the first-level telescopic arm 5, ensuring that the first-level telescopic arm 5 can slide stably inside the basic arm 4.

[0021] An upper slider 10 is fixedly provided on the top surface inside the first-stage telescopic arm 5, side sliders 11 are fixedly provided on both sides inside the first-stage telescopic arm 5, and a lower slider 12 is fixedly provided on the bottom surface inside the first-stage telescopic arm 5. The upper slider 10, side slider 11 and lower slider 12 inside the first-stage telescopic arm 5 are in sliding contact with the outer surface of the second-stage telescopic arm 6, ensuring that the second-stage telescopic arm 6 can slide stably inside the first-stage telescopic arm 5.

[0022] The telescopic assembly includes a telescopic oil cylinder 13 , an extension pulley 14 , a retracting pulley 16 , an extension wire rope 15 , and a retracting wire rope 17 .

[0023] The telescopic cylinder 13 is inserted into the secondary telescopic arm 6, and the axial direction of the telescopic cylinder 13 is kept coincident with the length direction of the secondary telescopic arm 6. One end of the piston rod of the telescopic cylinder 13 faces the rear side, and one end of the piston rod of the telescopic cylinder 13 is hinged to the inner wall of the basic arm 4. The cylinder body of the telescopic cylinder 13 is hinged to the inner wall of the secondary and primary telescopic arms 5. When the piston rod of the telescopic cylinder 13 is extended, the primary telescopic arm 5 is driven to extend outward from the inside of the secondary telescopic arm 6.

[0024] A pulley 14 is rotatably provided at one end of the bottom of the telescopic oil cylinder 13, one end of the extension wire rope 15 is fixedly provided inside the rear end opening of the basic arm 4, and the other end of the extension wire rope 15 is fixedly connected to the rear end opening of the secondary telescopic arm 6 after passing the extension pulley 14. When the piston rod of the telescopic oil cylinder 13 extends outward from the retracted state, it drives the primary telescopic arm 5 to extend outward toward the outside of the front end opening of the basic arm 4. In the process of extending outward, the primary telescopic arm 5 drives the extension pulley 14 to slide outward synchronously, and the extension pulley 14 drives the extension wire rope 15 to move synchronously. Since the end of the extension wire rope 15 connected to the basic arm 4 is fixed, it can only drive the end of the extension wire rope 15 away from the basic arm 4 to move outward, thereby driving the secondary telescopic arm 6 to extend outward toward the outside of the front end opening of the primary telescopic arm 5.

[0025] A retracting pulley 16 is rotatably arranged on the inner wall of the rear end opening of the primary telescopic arm 5, one end of the retracting wire rope 17 is fixedly connected to the rear end opening of the secondary telescopic arm 6, and the other end of the retracting wire rope 17 is fixedly connected to the front end opening of the basic arm 4 after passing through the retracting pulley 16. When the piston rod of the telescopic oil cylinder 13 is retracted inward from the extended state, the primary telescopic arm 5 is driven to gradually retract toward the inside of the front end opening of the basic arm 4. During the retraction process, the primary telescopic arm 5 drives the retracting pulley 16 to slide inward synchronously, and the retracting pulley 16 drives the retracting wire rope 17 to move synchronously. Since the end of the retracting wire rope 17 connected to the front end opening of the basic arm 4 is fixed, it can only drive the end of the retracting wire rope 17 away from the front end opening of the basic arm 4 to move inward, thereby driving the secondary telescopic arm 6 to also be retracted toward the inside of the front end opening of the primary telescopic arm 5.

[0026] The basic ladder frame 7, the primary ladder frame 8, and the secondary ladder frame 9 have the same structure, and all include a fixed frame 18 symmetrically arranged on the left and right sides and a plurality of climbing rods 19 fixed between the fixed frames 18 on both sides. The fixed frame 18 is a U-shaped plate structure, and the U-shaped openings of the fixed frames 18 on the left and right sides face each other. A plurality of climbing rods 19 are evenly arranged along the length direction of the fixed frame 18, and the climbing rods 19 are kept perpendicular to the fixed frames 18 on both sides, and the two ends of the climbing rods 19 are fixedly connected to the fixed frames 18 on both sides.

[0027] The fixing frames 18 on both sides of the primary ladder frame 8 are respectively slidably inserted into the fixing frames 18 on both sides of the basic ladder frame 7 , and the fixing frames 18 on both sides of the secondary ladder frame 9 are respectively slidably inserted into the fixing frames 18 on both sides of the primary ladder frame 8 .

[0028] A row of equally spaced guide blocks 20 are fixedly arranged at the inner lower corners of the two fixing frames 18 of the basic ladder frame 7, and a guide groove is arranged at the side edge of the lower end surfaces of the two fixing frames 18 of the primary ladder frame 8 that are away from each other. The two guide grooves of the primary ladder frame 8 maintain sliding contact with the two rows of guide blocks 20 of the basic ladder frame 7. The stability of the primary ladder frame 8 when sliding inside the basic ladder frame 7 is ensured by the mutual cooperation between the guide groove and the guide block 20.

[0029] A row of equally spaced guide blocks 20 are fixedly arranged at the inner lower corners of the two fixing frames 18 of the primary ladder frame 8, and a guide groove is arranged at the side edge of the lower end surfaces of the two fixing frames 18 of the secondary ladder frame 9 that are away from each other. The two guide grooves of the secondary ladder frame 9 are in sliding contact with the two rows of guide blocks 20 of the primary ladder frame 8. The stability of the secondary ladder frame 9 when sliding inside the primary ladder frame 8 is ensured by the mutual cooperation between the guide groove and the guide block 20.

[0030] A reinforcing plate 21 is fixedly disposed at the front end surface of the two fixing frames 18 of the basic ladder frame 7, a guide seat is fixedly disposed on each reinforcing plate 21, and a guide wheel 22 is rotatably disposed inside each guide seat. The two guide wheels 22 are in rolling contact with the end surfaces of the two fixing frames 18 of the primary ladder frame 8 that are away from each other. The mutual cooperation between the guide wheels 22 and the outer side surface of the fixing frame 18 ensures the stability of the primary ladder frame 8 when it slides inside the basic ladder frame 7.

[0031] Three basic ladder frame connecting rods 23 are fixedly arranged between the basic ladder frame 7 of the left ladder frame 2 and the basic ladder frame 7 of the right ladder frame 3, and the ladder frame connecting rods are perpendicular to the length direction of the left ladder frame 2 and the right ladder frame 3. The two ends of the first basic ladder frame connecting rod 23 are respectively fixedly arranged between the lower end surfaces of the front ends of the left and right basic ladder frames 7, the two ends of the second basic ladder frame connecting rod 23 are respectively fixedly arranged between the lower end surfaces of the middle parts of the left and right basic ladder frames 7, and the two ends of the third basic ladder frame connecting rod 23 are respectively fixedly arranged between the lower end surfaces of the rear ends of the left and right basic ladder frames 7.

[0032] A primary ladder frame connecting rod 24 is fixedly arranged between the primary ladder frame 8 of the left ladder frame 2 and the primary ladder frame 8 of the right ladder frame 3, and the primary ladder frame connecting rod 24 is perpendicular to the length direction of the left ladder frame 2 and the right ladder frame 3. The two ends of the primary ladder frame connecting rod 24 are respectively fixedly arranged between the lower end surfaces of the front ends of the left and right primary ladder frames 8.

[0033] A secondary ladder frame connecting rod 25 is fixedly arranged between the secondary ladder frame 9 of the left ladder frame 2 and the secondary ladder frame 9 of the right ladder frame 3, and the secondary ladder frame connecting rod 25 is perpendicular to the length direction of the left ladder frame 2 and the right ladder frame 3. The two ends of the secondary ladder frame connecting rod 25 are respectively fixedly arranged between the lower end surfaces of the front ends of the left and right secondary ladder frames 9.

[0034] Two left-right symmetrical connecting seats 26 are fixedly arranged in the middle of the upper end surfaces of the basic ladder frame connecting rod 23, the first-level ladder frame connecting rod 24, and the second-level ladder frame connecting rod 25. The two connecting seats 26 on the three basic ladder frame connecting rods 23 are respectively fixedly connected to the front, middle and rear ends of the left and right outer side surfaces of the basic arm 4, the two connecting seats 26 on the first-level ladder frame connecting rod 24 are respectively fixedly connected to the front ends of the left and right outer side surfaces of the first-level telescopic arm 5, and the two connecting seats 26 on the second-level ladder frame connecting rod 25 are respectively fixedly connected to the front ends of the left and right outer side surfaces of the second-level telescopic arm 6.

[0035] The basic arm 4 is fixedly connected to the left and right basic ladder frames 7 through three basic ladder frame connecting rods 23. The primary telescopic arm 5 is fixedly connected to the left and right primary ladder frames 8 through the primary ladder frame connecting rods 24. When the primary telescopic arm 5 slides inside the basic arm 4, it drives the left and right primary ladder frames 8 to slide synchronously inside the basic ladder frame 7. The secondary telescopic arm 6 is fixedly connected to the left and right secondary ladder frames 9 through the secondary ladder frame connecting rods 25. When the secondary telescopic arm 6 slides inside the primary telescopic arm 5, it drives the left and right secondary ladder frames 9 to slide synchronously inside the primary ladder frame 8.

[0036] A vertical guardrail 27 is fixedly provided on the upper end surface of the fixing frame 18 of all the basic ladder frames 7 , the primary ladder frames 8 , and the secondary ladder frames 9 away from the boom 1 .

[0037] The working principle of the present invention is: When it is necessary to carry out firefighting climbing operations, the fire rescue vehicle is parked at a designated location, and then the piston rod of the telescopic oil cylinder 13 is controlled to extend outward from the retracted state, driving the first telescopic arm 5 to extend outward toward the front end opening of the basic arm 4. In the process of extending outward, the first telescopic arm 5 drives the extension pulley 14 to slide outward synchronously, and the extension pulley 14 drives the extension wire rope 15 to move synchronously. Since the end of the extension wire rope 15 connected to the basic arm 4 is fixed, it can only drive the end of the extension wire rope 15 away from the basic arm 4 to move outward, thereby driving the second telescopic arm 6 to extend outward toward the front end opening of the first telescopic arm 5. As the first telescopic arm 5 and the second telescopic arm 6 are gradually extended, the first telescopic arm 5 drives the left and right first ladder frames 8 to extend synchronously through the first ladder frame connecting rod 24, and the second telescopic arm 6 drives the left and right second ladder frames 9 to extend synchronously through the second ladder frame connecting rod 25. When the telescopic cylinder 13 is extended into place, the first-level telescopic arm 5 and the second-level telescopic arm 6 are also extended into place, and the left and right first-level ladder frames 8 and the second-level ladder frames 9 are also extended into place. At this time, the rescue personnel can perform climbing rescue operations along the left ladder frame 2 and the right ladder frame 3 that are extended and unfolded into place.

[0038] When the firefighting climbing operation is completed, when the piston rod of the telescopic oil cylinder 13 is retracted inward from the extended state, the first telescopic arm 5 is driven to gradually retract toward the front end opening of the basic arm 4. During the retraction process, the first telescopic arm 5 drives the retraction pulley 16 to slide inward synchronously, and the retraction pulley 16 drives the retraction wire rope 17 to move synchronously. Since the end of the retraction wire rope 17 connected to the front end opening of the basic arm 4 is fixed, it can only drive the end of the retraction wire rope 17 away from the front end opening of the basic arm 4 to move inward, thereby driving the second telescopic arm 6 to also retract toward the inside of the front end opening of the first telescopic arm 5. As the first telescopic arm 5 and the second telescopic arm 6 are gradually retracted, the first telescopic arm 5 drives the left and right first ladder frames 8 to be retracted synchronously through the first ladder frame connecting rod 24, and the second telescopic arm 6 drives the left and right second ladder frames 9 to be retracted synchronously through the second ladder frame connecting rod 25. When the telescopic cylinder 13 is retracted into place, the first-level telescopic arm 5 and the second-level telescopic arm 6 are also retracted into the basic arm 4, and the left and right first-level ladder frames 8 and the second-level ladder frames 9 are also retracted into the basic ladder frame 7. At this time, the rescue personnel can retract the fire rescue arm frame as a whole.

[0039] 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.

Claims

1. A three-section synchronous telescopic dual-channel fire rescue boom, characterized in that: The invention comprises a boom (1) and a telescopic ladder frame, wherein the boom (1) comprises a basic arm (4), a first-level telescopic arm (5), and a second-level telescopic arm (6) which are slidably connected in sequence, a telescopic assembly is arranged inside the basic arm (4), and the boom (1) is driven to be telescopic by the telescopic assembly; the telescopic ladder frame comprises a left ladder frame (2) and a right ladder frame (3) which are symmetrically arranged, and the left ladder frame (2) and the right ladder frame (3) both comprise a basic ladder frame (7), a first-level ladder frame (8), and a second-level ladder frame (9) which are slidably connected in sequence, the basic ladder frame (7) is fixedly connected to the basic arm (4), the first-level ladder frame (8) is fixedly connected to the first-level telescopic arm (5), and the second-level ladder frame (9) is fixedly connected to the second-level telescopic arm (6).

2. The three-section synchronous telescopic dual-channel fire rescue boom according to claim 1, characterized in that: The rear end of the primary telescopic arm (5) is slidably inserted into the front end opening of the basic arm (4), and the rear end of the secondary telescopic arm (6) is slidably inserted into the front end opening of the primary telescopic arm (5); an upper slider (10) is fixedly arranged on the top surface of the basic arm (4), side sliders (11) are fixedly arranged on both sides of the basic arm (4), and a lower slider (12) is fixedly arranged on the bottom surface of the basic arm (4); the upper slider (10), the side slider (11), and the lower slider (12) inside the basic arm (4) are in sliding contact with the outer side surface of the primary telescopic arm (5); an upper slider (10) is fixedly arranged on the top surface of the primary telescopic arm (5), side sliders (11) are fixedly arranged on both sides of the primary telescopic arm (5), and a lower slider (12) is fixedly arranged on the bottom surface of the primary telescopic arm (5); the upper slider (10), the side slider (11), and the lower slider (12) inside the primary telescopic arm (5) are in sliding contact with the outer side surface of the secondary telescopic arm (6).

3. The three-section synchronous telescopic dual-channel fire rescue boom according to claim 2 is characterized in that: The telescopic assembly comprises a telescopic oil cylinder (13); the telescopic oil cylinder (13) is inserted into the interior of the secondary telescopic arm (6); one end of the piston rod of the telescopic oil cylinder (13) is hinged to the inner wall of the basic arm (4); and the cylinder body of the telescopic oil cylinder (13) is hinged to the inner wall of the secondary and primary telescopic arms (5).

4. The three-section synchronous telescopic dual-channel fire rescue boom according to claim 3 is characterized in that: The telescopic assembly further comprises an extension pulley (14) and an extension wire rope (15); the extension pulley (14) is rotatably arranged at one end of the cylinder bottom of the telescopic oil cylinder (13); one end of the extension wire rope (15) is fixedly arranged inside the rear end opening of the basic arm (4); and the other end of the extension wire rope (15) passes around the extension pulley (14) and is fixedly connected to the rear end opening of the secondary telescopic arm (6).

5. The three-section synchronous telescopic dual-channel fire rescue boom according to claim 3 is characterized in that: The telescopic assembly further comprises a retracting pulley (16) and a retracting wire rope (17); a retracting pulley (16) is rotatably arranged on the inner wall of the rear end opening of the primary telescopic arm (5); one end of the retracting wire rope (17) is fixedly connected to the rear end opening of the secondary telescopic arm (6); and the other end of the retracting wire rope (17) is fixedly connected to the front end opening of the basic arm (4) after passing around the retracting pulley (16).

6. The three-section synchronous telescopic dual-channel fire rescue boom according to claim 1, characterized in that: The basic ladder frame (7), the first-level ladder frame (8), and the second-level ladder frame (9) have the same structure, and all include fixed frames (18) symmetrically arranged on left and right sides and a plurality of climbing rods (19) fixed between the fixed frames (18) on both sides; the fixed frame (18) is a U-shaped plate structure, and the U-shaped openings of the fixed frames (18) on the left and right sides face each other; the plurality of climbing rods (19) are evenly arranged along the length direction of the fixed frame (18), the climbing rods (19) are kept perpendicular to the fixed frames (18) on both sides, and the two ends of the climbing rods (19) are fixedly connected to the fixed frames (18) on both sides; the fixed frames (18) on both sides of the first-level ladder frame (8) are respectively slidably inserted into the fixed frames (18) on both sides of the basic ladder frame (7), and the fixed frames (18) on both sides of the second-level ladder frame (9) are respectively slidably inserted into the fixed frames (18) on both sides of the first-level ladder frame (8).

7. The three-section synchronous telescopic dual-channel fire rescue boom according to claim 6, characterized in that: A row of equidistant guide blocks (20) are fixedly arranged at the inner lower corners of the two fixed frames (18) of the basic ladder frame (7), and a guide groove is respectively arranged at the side edges of the lower end surfaces of the two fixed frames (18) of the primary ladder frame (8) away from each other, and the two guide grooves of the primary ladder frame (8) are kept in sliding contact with the two rows of guide blocks (20) of the basic ladder frame (7); a row of equidistant guide blocks (20) are respectively fixedly arranged at the inner lower corners of the two fixed frames (18) of the primary ladder frame (8), and a guide groove is respectively arranged at the side edges of the lower end surfaces of the two fixed frames (18) of the secondary ladder frame (9), and the two guide grooves of the secondary ladder frame (9) are kept in sliding contact with the two rows of guide blocks (20) of the primary ladder frame (8).

8. The three-section synchronous telescopic dual-channel fire rescue boom according to claim 6, characterized in that: A reinforcing plate (21) is fixedly arranged at the front end surface of the two fixing frames (18) of the basic ladder frame (7), a guide seat is fixedly arranged on each reinforcing plate (21), and a guide wheel (22) is rotatably arranged inside each guide seat. The two guide wheels (22) are respectively in rolling contact with the end surfaces of the two fixing frames (18) of the primary ladder frame (8) that are away from each other.

9. The three-section synchronous telescopic dual-channel fire rescue boom according to claim 6, characterized in that: Three basic ladder frame connecting rods (23) are fixedly arranged between the basic ladder frame (7) of the left ladder frame (2) and the basic ladder frame (7) of the right ladder frame (3), and the two ends of the three basic ladder frame connecting rods (23) are respectively fixedly arranged between the front end, the middle end and the rear end of the lower end surfaces of the left and right basic ladder frames (7); a first-level ladder frame connecting rod (24) is fixedly arranged between the first-level ladder frame (8) of the left ladder frame (2) and the first-level ladder frame (8) of the right ladder frame (3), and the two ends of the first-level ladder frame connecting rod (24) are respectively fixedly arranged between the lower end surfaces of the front ends of the left and right first-level ladder frames (8); a second-level ladder frame connecting rod (25) is fixedly arranged between the second-level ladder frame (9) of the left ladder frame (2) and the second-level ladder frame (9) of the right ladder frame (3), and the two ends of the second-level ladder frame connecting rod (25) are respectively fixedly arranged between the lower end surfaces of the front ends of the left and right second-level ladder frames (9).

10. The three-section synchronous telescopic dual-channel fire rescue boom according to claim 9, characterized in that: Two left-right symmetrical connecting seats (26) are fixedly arranged at the middle of the upper end surfaces of the basic ladder frame connecting rod (23), the first-level ladder frame connecting rod (24) and the second-level ladder frame connecting rod (25). The two connecting seats (26) on the three basic ladder frame connecting rods (23) are respectively fixedly connected to the front, middle and rear ends of the left and right outer side surfaces of the basic arm (4), the two connecting seats (26) on the first-level ladder frame connecting rod (24) are respectively fixedly connected to the front ends of the left and right outer side surfaces of the first-level telescopic arm (5), and the two connecting seats (26) on the second-level ladder frame connecting rod (25) are respectively fixedly connected to the front ends of the left and right outer side surfaces of the second-level telescopic arm (6).

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