A boiler truck steam generator with double pipes

Abstract

The application discloses a boiler steam generator with double pipelines for a boiler car and relates to the technical field of energy-saving boiler steam generators, which comprises a base, a boiler fixedly connected to the top of the base and a double-pipe evaporation assembly arranged in the boiler. The threaded inner and outer double-pipe evaporation pipes are provided, the heat transfer efficiency is higher, the steam generation efficiency is higher, the different steam demand can be met by switching the double pipes, and the risk of the whole system shutdown caused by the single pipeline failure is avoided. The outer evaporation pipe can be adjusted in the vertical direction after the spacing between the inner and outer double pipes is adjusted, the evaporation pipe of the outer pipe can be moved in the vertical direction, the evaporation pipe of the inner pipe is further arranged in a staggered mode with the evaporation pipe of the outer pipe, the heating effect of the hot air flow on the double pipes is improved again, and the effect of energy-saving steam generation is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy-saving boiler steam generator, in particular to a boiler steam generator with double pipelines for vehicles. BACKGROUND

[0002] The boiler steam generator for vehicles is a device that recovers waste heat from an energy-saving boiler and supplies it to a steam generator, and can produce steam for use in other sections. This device is usually designed to be compact and suitable for mobile or portable scenarios.

[0003] In order to improve the efficiency of steam generation, some energy-saving boilers use double U-shaped ring type pipeline steam generators. In the case where the heat source enters the boiler from one side of the boiler to heat the pipeline, due to the small spacing between the multiple bending sections of the double U-shaped ring type pipeline, the heat source cannot heat the U-shaped ring type pipeline far away from the heat source after passing through the U-shaped ring type pipeline close to the heat source. The side of the U-shaped ring type pipeline far away from the heat source is even less ideal for heating, resulting in insufficient heating of the U-shaped ring type pipeline far away from the heat source. When the U-shaped ring type pipeline close to the heat source stops running, the heat source has insufficient heat conduction efficiency after passing through the stopped U-shaped ring type pipeline to the running U-shaped ring type pipeline, resulting in the need to increase the power of the heat source to heat the running U-shaped ring type pipeline, thereby increasing energy consumption.

[0004] To solve the above problems, the present application provides a boiler steam generator with double pipelines for vehicles. SUMMARY

[0005] To solve the above technical problems, a boiler steam generator with double pipelines for vehicles is provided.

[0006] To achieve the above purposes, the present application can adopt the following technical solutions:

[0007] The present application provides a boiler steam generator with double pipelines for vehicles, comprising a base, a boiler fixedly connected to the top of the base, and a double-pipe evaporation assembly arranged in the interior of the boiler.

[0008] The double-tube evaporation assembly comprises a circular ring I fixedly arranged symmetrically in a boiler, two sliding rods I fixedly connected symmetrically between the two circular rings I, two rotating rods I rotatably connected symmetrically between the two circular rings I, two electric telescopic rods fixedly arranged symmetrically at the bottom of the boiler, two circular rings II symmetrically arranged in the boiler, the telescopic ends of the two electric telescopic rods being fixedly connected to the lower circular ring II, two sliding rods II fixedly connected symmetrically between the two circular rings II, two rotating rods II rotatably connected symmetrically between the two circular rings II, upper threads and lower threads being symmetrically arranged on the two rotating rods I and the two rotating rods II, a plurality of sliding seats I being arranged on each two adjacent rotating rods I and sliding rods I, and a plurality of sliding seats II being arranged on each two sliding rods II and rotating rods II.

[0009] Preferably, the four upper threads are arranged as a group, the four lower threads are arranged as a group, and the upper threads and the lower threads of the group are symmetrically arranged on the rotating rods I and the rotating rods II.

[0010] Preferably, the plurality of sliding seats I are threadedly connected to the rotating rods I through the upper threads and the lower threads, and the plurality of sliding seats II are threadedly connected to the rotating rods II through the upper threads and the lower threads.

[0011] Preferably, the sliding seats I and the sliding seats II are rotatably connected with rotating sleeves, the evaporation tubes are arranged in the rotating sleeves, and the rotating sleeves and the evaporation tubes are arranged in an inclined manner.

[0012] Preferably, the evaporation tubes are semicircular arcs.

[0013] Preferably, the evaporation tubes are provided with rotating connection assemblies, the rotating connection assemblies comprise fixed tubes fixedly connected to the bottom ends of the evaporation tubes, connecting tubes fixedly connected to the sides of the fixed tubes away from the evaporation tubes, ball sleeves fixedly connected to the top ends of the evaporation tubes, ball joints rotatably connected in the ball sleeves, and through holes formed in the ball joints and fixedly connected to the connecting tubes away from the fixed tubes.

[0014] Preferably, the connecting tubes are in communication with the through holes, and the through holes are in communication with the top ends of the evaporation tubes.

[0015] Preferably, the bottom of the boiler is provided with a misalignment assembly, the misalignment assembly comprises a motor I fixedly arranged at the bottom of the boiler, a belt pulley I fixedly connected to the output end of the motor I, a belt pulley II rotatably connected to the side of the bottom of the circular ring I away from the belt pulley I, a belt I commonly arranged on the belt pulley I and the belt pulley II, a motor II fixedly arranged at the bottom of the boiler, a belt pulley III fixedly connected to the output shaft of the motor II, a belt pulley IV rotatably connected to the side of the bottom of the circular ring II away from the belt pulley III, and a belt II commonly arranged on the belt pulley III and the belt pulley IV.

[0016] Preferably, the bottom ends of the two rotating rods I pass through the circular ring I and are fixedly connected to the belt pulley I and the belt pulley II, respectively.

[0017] Preferably, the bottom of the two rotating rods two is provided with sliding grooves, the top of the belt pulley three and the belt pulley four is fixedly connected with sliding rods, the top of the two sliding rods penetrates through the ring two, the end of the two sliding rods penetrating through the ring two is slidably connected with the sliding grooves, the bottom of the two rotating rods two is symmetrically provided with limiting grooves, every two limiting grooves form a group, the two groups of limiting grooves are in communication with the two sliding grooves respectively, and the two sliding rods are symmetrically and fixedly connected with limiting blocks, and the two groups of limiting blocks are slidably connected with the two groups of limiting grooves respectively.

[0018] From the above, the steam generator with double-pipe boiler car in the application has the following characteristics and advantages:

[0019] By setting the inner and outer double-pipe evaporation pipes, compared with the U-shaped ring evaporation pipe, the heat transfer efficiency is higher, the steam generation efficiency is higher, and different steam demand can be met by switching the double pipes, avoiding the risk of system shutdown due to single pipe failure, thereby ensuring the stability and safety of the system, and one of the pipes can be closed at low load, thereby saving fuel consumption and reducing operating costs, to cope with the limited energy in the boiler car;

[0020] Through the setting of the upper thread and the lower thread, the evaporation pipes can move equidistantly upwards and downwards, so that the distance between the multiple evaporation pipes is increased synchronously, after the pipes are pulled apart by a certain distance, the adjacent pipes will have a reduced hindering effect on heat conduction, and the heat has more space to diffuse, so that the heat can be more evenly transferred to each pipe position, thereby improving the steam generation efficiency under the condition of unchanged input power;

[0021] Through the setting of the lifting adjustment of the outer evaporation pipes, after the distance between the inner and outer double pipes is adjusted, the evaporation pipes of the outer pipes can move in the vertical direction to further dislocate the evaporation pipes of the inner pipes and the evaporation pipes of the outer pipes, thereby further improving the heating effect of the hot air flow on the double pipes and achieving the effect of energy-saving steam generation;

[0022] Through the lifting of the outer evaporation pipes, in the state of inactivation of the outer pipes, the outer evaporation pipes can be lifted according to the distance adjustment of the inner pipes, so that the evaporation pipes on the outer pipes avoid the evaporation pipes on the inner pipes, thereby avoiding the blocking of the evaporation pipes on the outer pipes to the hot air flow, so as to ensure the heat conduction efficiency in the boiler during single pipe operation, avoid the blocking of the outer pipes to the inner pipes, and avoid the situation that the heating efficiency is insufficient and the heating power needs to be increased, thereby further achieving the energy-saving effect of steam generation. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 The whole structure is shown in the schematic diagram of the application;

[0024] Figure 2The internal three-dimensional schematic view of the overall structure shown in the present application;

[0025] Figure 3 The bottom structure shown in the present application is shown in the bottom three-dimensional schematic view;

[0026] Figure 4 The internal structure of the ball joint shown in the present application is shown in the internal structure sectional view; Figure 2 The enlarged view at A in the present application;

[0027] Figure 5 The internal structure of the ball joint shown in the present application is shown in the internal structure sectional view; Figure 2 The enlarged view at B in the present application;

[0028] Figure 6 The internal structure of the ball joint shown in the present application is shown in the internal structure sectional view; Figure 2 The enlarged view at C in the present application;

[0029] Figure 7 The internal structure of the ball joint shown in the present application is shown in the internal structure sectional view;

[0030] Figure 8 The internal structure of the ball joint shown in the present application is shown in the internal structure sectional view; Figure 3 The enlarged view at D in the present application;

[0031] Figure 9 The internal structure of the ball joint shown in the present application is shown in the internal structure sectional view;

[0032] Figure 10 The internal structure of the ball joint shown in the present application is shown in the internal structure sectional view.

[0033] Wherein, the reference numerals in the present application are: 1, base; 2, boiler;

[0034] Double-tube evaporation assembly: 301, circular ring one; 302, sliding rod one; 303, rotating rod one; 304, electric telescopic rod; 305, circular ring two; 306, sliding rod two; 307, rotating rod two; 308, upper thread; 309, lower thread; 310, sliding seat one; 311, sliding seat two; 312, rotating sleeve; 313, evaporation tube;

[0035] Rotary connection assembly: 401, fixed tube; 402, connecting tube; 403, ball sleeve; 404, ball joint; 405, through hole;

[0036] Staggered assembly: 501, motor one; 502, pulley one; 503, pulley two; 504, motor two; 505, pulley three; 506, pulley four; 507, sliding groove; 508, sliding rod; 509, limiting groove; 510, limiting block. DETAILED DESCRIPTION

[0037] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments, and all other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative labor fall within the protection scope of the present application.

[0038] As Figures 1-10 shown, the embodiments provided by the present application will be described in detail below:

[0039] A boiler steam generator with double pipelines for a locomotive, as Figures 1-6 shown, comprises a base 1, the top of the base 1 is fixedly connected with a boiler 2, the side of the boiler 2 is provided with a fan system and a burner, which are used to heat the pipeline inside the boiler 2, the fan system and the burner are prior art and will not be described in detail, the inside of the boiler 2 is provided with a double-pipe evaporation assembly;

[0040] The double-tube evaporation assembly comprises two symmetrical circular rings 301 fixedly installed in the boiler 2, two symmetrical sliding rods 302 fixedly connected between the two circular rings 301, two symmetrical rotating rods 303 rotatably connected between the two circular rings 301, two symmetrical electric telescopic rods 304 fixedly installed at the bottom of the boiler 2, two symmetrical circular rings 305 arranged in the boiler 2, the telescopic ends of the two electric telescopic rods 304 being fixedly connected with the lower circular ring 305, two symmetrical sliding rods 306 fixedly connected between the two circular rings 305, two symmetrical rotating rods 307 rotatably connected between the two circular rings 305, upper threads 308 and lower threads 309 being symmetrically arranged on the two rotating rods 303 and 307, four upper threads 308 being arranged as a group, four lower threads 309 being arranged as a group, one group of upper threads 308 and lower threads 309 being symmetrically arranged on the rotating rod 303 and 307, a plurality of sliding seats 310 being sleeved on every two adjacent rotating rods 303 and sliding rods 302, the sliding seats 310 being slidably connected with the outer wall of the sliding rod 302, the plurality of sliding seats 310 being threadedly connected with the rotating rod 303 through the upper threads 308 and lower threads 309, a plurality of sliding seats 311 being sleeved on every two sliding rods 306 and rotating rods 307, the sliding seats 311 being slidably connected with the outer wall of the sliding rod 306, the plurality of sliding seats 311 being threadedly connected with the rotating rod 307 through the upper threads 308 and lower threads 309, the upper threads 308 and lower threads 309 being arranged in opposite directions, the plurality of sliding seats 311 and sliding seats 310 distributed above and below being driven away from each other through the upper threads 308 and lower threads 309, the number of the sliding seats 310 and 311 being odd, the middle part of the rotating rod 303 and 307 not being provided with the upper threads 308 or lower threads 309, the middle sliding seats 310 and 311 being fixedly connected with the sliding rod 302 and 306, a rotating sleeve 312 being rotatably connected on the sliding seat 310 and 311, an evaporation tube 313 being sleeved in the rotating sleeve 312, the evaporation tube 313 being movable in the rotating sleeve 312, the rotating sleeve 312 being made of rubber and not being abraded when the evaporation tube 313 is pulled to move, the evaporation tube 313 being semicircular, and the rotating sleeve 312 and evaporation tube 313 being arranged in an inclined manner.

[0041] It should be noted that the evaporation tubes 313 connected with the plurality of rotating sleeves 312 on the sliding seats 310 and 311 in the figure form two evaporation tubes 313 inside and outside, and in order to clearly show the structure, only an example is shown in the figure, and in the prior art, the distance between the plurality of evaporation tubes 313 is close and dense, which is similar to a spiral spring.

[0042] Further, as Figure 5 and Figure 7As shown, the evaporation pipe 313 is provided with a rotating connection assembly, the rotating connection assembly includes a fixed pipe 401 fixedly connected to the bottom end of the evaporation pipe 313, the fixed pipe 401 is fixedly connected with a connecting pipe 402 away from the evaporation pipe 313, the top end of the evaporation pipe 313 is fixedly connected with a ball sleeve 403, the ball sleeve 403 is rotatably connected with a ball joint 404, the connecting pipe 402 is fixedly connected with the ball joint 404 away from the fixed pipe 401, and the ball joint 404 is provided with a through hole 405. The connecting pipe 402 is in communication with the through hole 405, the through hole 405 is in communication with the top end of the evaporation pipe 313, the top end of the two evaporation pipes 313 at the top is not provided with the ball sleeve 403 for discharging steam, and the bottom end of the two evaporation pipes 313 at the bottom is not provided with the fixed pipe 401 for inputting water.

[0043] Further, as shown in Figure 3 and Figures 8-10 As shown, the inner bottom of the boiler 2 is provided with a staggered assembly, the staggered assembly includes a motor one 501 fixedly installed on the inner bottom of the boiler 2, a belt pulley one 502 fixedly connected to the output end of the motor one 501, a belt pulley two 503 rotatably connected to the bottom of the circular ring one 301 away from the belt pulley one 502, a belt one commonly sleeved on the belt pulley one 502 and the belt pulley two 503, the bottom end of the two rotating rods one 303 passes through the circular ring one 301 and is fixedly connected with the belt pulley one 502 and the belt pulley two 503 respectively, a motor two 504 is fixedly installed on the inner bottom of the boiler 2, a belt pulley three 505 is fixedly connected to the output shaft of the motor two 504, a belt pulley four 506 is rotatably connected to the bottom of the circular ring two 305 away from the belt pulley three 505, a belt two is commonly sleeved on the belt pulley three 505 and the belt pulley four 506, the bottom of the two rotating rods two 307 is provided with a sliding groove 507, the top of the belt pulley three 505 and the belt pulley four 506 is fixedly connected with a sliding rod 508, the top end of the two sliding rods 508 passes through the circular ring two 305, the end of the two sliding rods 508 passing through the circular ring two 305 is slidably connected with the sliding groove 507, the bottom of the two rotating rods two 307 is symmetrically provided with a limiting groove 509, every two limiting grooves 509 form a group, the two groups of limiting grooves 509 are in communication with the two sliding grooves 507 respectively, the two sliding rods 508 are symmetrically fixedly connected with a limiting block 510, and the two groups of limiting blocks 510 are slidably connected with the two groups of limiting grooves 509 respectively.

[0044] In combination with the above-mentioned embodiments, the following is the working process and working principle of the above-mentioned embodiments:

[0045] The initial state is:

[0046] The two circular rings two 305 have the same height as the circular ring one 301, and the two rotating rods one 303 and the two rotating rods two 307 are not rotated.

[0047] The working state is:

[0048] Double-tube evaporation:

[0049] In the process of generating steam, the preheated water is input from the bottom of the boiler 2 to the two evaporation tubes 313 at the bottom, and then enters the through hole 405 through the ball sleeve 403 and the connecting pipe 402, and then enters the next evaporation tube 313 through the connecting pipe 402 and the fixed pipe 401. In the process of moving upward through multiple evaporation tubes 313, the burners on the side of the boiler 2 cooperate with the fan to heat and evaporate the water in the multiple evaporation tubes 313. The steam generated by evaporation is discharged from the two evaporation tubes 313 at the top to the steam collection pipe, thereby realizing the effect of simultaneous evaporation of double-tube.

[0050] Adjusting the distance:

[0051] In the process of generating steam, the motor one 501 can be started to rotate the pulley one 502 and the pulley two 503 at the same time, and the pulley one 502 and the pulley two 503 drive the two rotating rods one 303 to rotate synchronously. When the rotating rod one 303 rotates, the sliding seat one 310 above the central sliding seat one 310 moves upward under the thread action of the upper thread 308 and the limiting action of the sliding rod one 302, and the sliding seat one 310 below the central sliding seat one 310 moves downward under the thread action of the lower thread 309 and the limiting action of the sliding rod one 302. Under the action of multiple upper threads 308 and lower threads 309, multiple sliding seats one 310 realize synchronous distance adjustment. In this process, since the distance between the evaporation tubes 313 increases, the rotating sleeve 312 and the evaporation tubes 313 rotate under the connection action of the ball sleeve 403 and the ball joint 404, and the fixed pipe 401 at the bottom of the multiple evaporation tubes 313 drives the ball joint 404 to rotate in the ball sleeve 403, so that the evaporation tubes 313 change distance and angle, and water and steam can still enter the next evaporation tube 313 through the through hole 405, the connecting pipe 402 and the fixed pipe 401, realizing the effect of increasing the distance between the inner circle evaporation tubes 313 during steam generation. After pulling the pipeline apart by a certain distance, the hindering effect of adjacent pipelines on heat conduction will decrease, and heat has more space to diffuse, so that heat can be more evenly transmitted to each pipeline position, making the multiple evaporation tubes 313 more evenly heated, and the water flow in the evaporation tubes 313 is heated better, thereby improving the efficiency of steam generation.

[0052] Staggered adjustment:

[0053] After the evaporation pipe 313 spacing adjustment on the two groups of slide rods one 302 and rotating rods one 303, the motor two 504 can be started to drive the belt pulley three 505 to rotate, thereby driving the belt pulley four 506 to rotate. When the belt pulley three 505 and the belt pulley four 506 rotate, through the cooperation of the limiting groove 509 and the limiting block 510, the belt pulley three 505 and the belt pulley four 506 drive the two rotating rods two 307 to rotate through the slide rods 508 and the limiting block 510. When the two rotating rods two 307 rotate, the slide seats two 311 above the central slide seat two 311 move upward under the thread action of the upper threads 308 and the limiting action of the slide rods two 306, and the slide seats two 311 below the central slide seat two 311 move downward under the thread action of the lower threads 309 and the limiting action of the slide rods two 306. The same synchronous variable distance is performed with the slide seat one 310, and the spacing between the multiple evaporation pipes 313 is increased. On the basis of the evaporation pipe 313 spacing increase on the slide rods one 302 and the rotating rods one 303, the evaporation pipe 313 spacing on the slide rods two 306 and the rotating rods two 307 is increased. That is, the evaporation pipe 313 of the outer ring can make the evaporation pipes 313 of the inner and outer two routes staggered in the vertical direction, and also increase the spacing between the multiple evaporation pipes 313 of the outer ring. The hot gas flow blown into the boiler 2 by the fan and the burner can better heat the evaporation pipes 313 of the inner and outer two routes, and the efficiency of steam generation is improved.

[0054] Staggered lifting:

[0055] On the basis of the inner and outer double-pipe evaporation pipe 313 variable pitch misplacement, the electric telescopic rod 304 can be started, so that the electric telescopic rod 304 pushes the lower annular ring two 305 to move upwards, so that the two annular rings two 305, two slide rods two 306, two rotating rods two 307 and the sliding seat two 311 and the evaporation pipe 313 on them move upwards synchronously, in the process, the sliding rod 508 and the limiting block 510 are fixed under the connection action of the belt pulley three 505, the annular ring two 305 and the rotating rod two 307 move upwards, so that the sliding rod 508 and the limiting block 510 partially slide out of the sliding groove 507 and the limiting groove 509, and under the limiting cooperation of the limiting groove 509 and the limiting block 510, the sliding rod 508 can still drive the rotating rod two 307 to rotate when rotating, the evaporation pipe 313 on the slide rod two 306 and the rotating rod two 307 is adjusted in pitch, under the action of the two annular rings two 305, the two slide rods two 306, the two rotating rods two 307 and the sliding seat two 311 and the evaporation pipe 313 on them moving upwards synchronously, the evaporation pipe 313 on the two slide rods two 306 and the rotating rod two 307 and the evaporation pipe 313 on the two slide rods one 302 and the rotating rod one 303 are further mislocated, avoiding the evaporation pipe 313 of the inner and outer two circles to have the position of crossing each other to block the heat transfer, again improving the heating effect of the evaporation pipe 313 on the hot gas flow in the boiler 2 sent by the burner and the fan, so that the evaporation efficiency of the water flow in the evaporation pipe 313 can be improved under the condition that the input power of the burner and the fan is fixed, the energy-saving effect is realized, and when the outer pipeline is disabled, the evaporation pipe 313 on the outer pipeline can also be moved to avoid the evaporation pipe 313 on the inner pipeline, so as to ensure the heating and evaporation effect when the inner pipeline operates alone.

[0056] The above only describes the embodiments of the present application, and does not limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A boiler vehicle steam generator with dual pipes, characterized in that, include: A base (1) is fixedly connected to the top of the base (1), and a boiler (2) is installed inside the boiler (2). The boiler (2) is equipped with a double-tube evaporation assembly. The double-tube evaporation assembly includes two circular rings (301) symmetrically fixedly installed inside the boiler (2), two sliding rods (302) symmetrically fixedly connected between the two circular rings (301), two rotating rods (303) symmetrically rotatably connected between the two circular rings (301), two electric telescopic rods (304) symmetrically fixedly installed at the bottom of the boiler (2), and two circular rings (305) symmetrically arranged inside the boiler (2). The telescopic ends of the two electric telescopic rods (304) are fixedly connected to the lower circular ring (305). Two slide rods (306) are symmetrically fixedly connected between the two rings (305). Two rotating rods (307) are rotatably connected between the two rings (305). The two rotating rods (303) and the two rotating rods (307) are symmetrically provided with upper threads (308) and lower threads (309). Multiple sliding seats (310) are sleeved on each pair of adjacent rotating rods (303) and slide rods (302). Multiple sliding seats (311) are sleeved on each pair of slide rods (306) and rotating rods (307). Both sliding seat one (310) and sliding seat two (311) are rotatably connected to rotating sleeves (312), and evaporation tubes (313) are sleeved inside rotating sleeves (312). The rotating sleeves (312) and evaporation tubes (313) are inclined. A rotating connection assembly is provided on the evaporator tube (313). The rotating connection assembly includes a fixed tube (401) fixedly connected to the bottom end of the evaporator tube (313), a connecting tube (402) fixedly connected to the side of the fixed tube (401) away from the evaporator tube (313), a ball sleeve (403) fixedly connected to the top end of the evaporator tube (313), a ball joint (404) rotatably connected inside the ball sleeve (403), and a connecting tube (402) fixedly connected to the ball joint (404) at the end away from the fixed tube (401). A through hole (405) is provided on the ball joint (404). The connecting pipe (402) is connected to the through hole (405), and the through hole (405) is connected to the top end of the evaporator (313); The bottom of the boiler (2) is provided with a misalignment assembly, which includes a motor (501) fixedly installed at the bottom of the boiler (2), a pulley (502) fixedly connected to the output end of the motor (501), a pulley (503) rotatably connected to the bottom of the ring (301) away from the pulley (502), and a belt (1) is fitted on the pulley (502) and the pulley (503). The bottom of the boiler (2) is fixedly installed with a motor (504), a pulley (505) fixedly connected to the output shaft of the motor (504), a pulley (4) rotatably connected to the bottom of the ring (305) away from the pulley (505), and a belt (2) is fitted on the pulley (3) and the pulley (4) rotatably connected to the bottom of the ring (305) away from the pulley (505). The bottom ends of the two rotating rods (303) pass through the ring (301) and are fixedly connected to the pulley (502) and the pulley (503) respectively; The bottom of the two rotating rods (307) is provided with sliding grooves (507). The top of the pulleys (505) and (506) is fixedly connected with sliding rods (508). The top of the two sliding rods (508) passes through the ring (305). One end of the two sliding rods (508) passing through the ring (305) is slidably connected to the sliding grooves (507). The bottom of the two rotating rods (307) is symmetrically provided with limiting grooves (509). Every two limiting grooves (509) form a group. The two groups of limiting grooves (509) are respectively connected to the two sliding grooves (507). The two sliding rods (508) are symmetrically fixedly connected with limiting blocks (510). The two groups of limiting blocks (510) are respectively slidably connected to the two groups of limiting grooves (509).

2. A boiler vehicle steam generator with dual pipes according to claim 1, characterized in that, The upper threads (308) are arranged in groups of four, and the lower threads (309) are arranged in groups of four. The upper threads (308) and lower threads (309) are symmetrically arranged on the first rotating rod (303) and the second rotating rod (307).

3. A boiler vehicle steam generator with dual pipes according to claim 2, characterized in that, Multiple sliding seats (310) are threadedly connected to rotating rod (303) via upper thread (308) and lower thread (309), and multiple sliding seats (311) are threadedly connected to rotating rod (307) via upper thread (308) and lower thread (309).

4. A boiler vehicle steam generator with dual pipes according to claim 1, characterized in that, The evaporator tube (313) is semi-circular.

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