A manned construction platform under a steel truss that is easy to disassemble and assemble

Abstract

The present invention relates to the technical field of equipment under bridges, and discloses a manned construction platform under a steel truss which is easy to assemble and disassemble, comprising a bridge truss and a supporting platform, wherein a supporting rail is arranged at the bottom of the bridge truss, an installation groove is arranged inside the supporting rail, and an assembly groove is arranged at least at one end of the supporting rail, and the assembly groove is connected with the installation groove; the manned construction platform under the steel truss which is easy to assemble and disassemble is convenient for erecting, installing and disassembling the supporting platform through the design of a supporting seat and a connecting rotating seat and the combined design of the upper end rod body of the supporting rod through a connecting plate and a hanging plate and the assembly groove and the installation groove in the supporting rail, and at the same time, an inner sleeve is arranged inside the supporting rod, and the axial movement of the inner sleeve is used to limit the rotation of the connecting rotating seat relative to the supporting seat, and then the axial movement of the inner sleeve is used to control the driving mechanism to drive the supporting platform to move, so as to avoid the supporting platform from shaking when the construction personnel are working or when the supporting platform is moving.

Description

Technical Field

[0001] The invention relates to the technical field of equipment under a bridge, in particular to a manned construction platform under a steel truss which is convenient for assembly and disassembly. Background Art

[0002] The bridge steel truss is a supporting truss made of steel and is the main load-bearing component of the bridge. After the basic structure of the bridge steel truss is completed, the bridge steel truss still needs to be constructed, such as the assembly construction at the bottom of the bridge steel truss and the later maintenance and repair construction of the bridge steel truss. During this process, a construction platform needs to be set up at the bottom of the bridge steel truss for use by workers.

[0003] The currently published patent document, announcement number CN220977730U, discloses a manned construction platform under a steel frame, including a support frame and a bridge deck, the bridge deck is arranged on the top surface of the support frame, the support frame includes a horizontal support rod, the horizontal support rod is arranged at the bottom of the bridge deck, a guide rail is arranged on the top of the horizontal support rod, the extension direction of the guide rail is parallel to the long side of the bridge deck, the top surface of the guide rail is slidably connected to a movable seat, and a pull rod is arranged on the top of the horizontal support rod, and the pull rod is located on one side of the movable seat.

[0004] When the above-mentioned construction platform under the steel truss is in use, it is necessary to build support structures such as support frames, horizontal support rods, connecting frames, and cross bars. The support structure is complicated to build and is not easy to disassemble. If the support structure is disassembled, it will also affect the subsequent repair and maintenance work. For the existing hoisting construction platform, when construction workers are working on the surface of the construction platform, the construction platform will shake, and the stability of the construction platform is difficult to guarantee. Summary of the invention

[0005] In order to solve the above problems of the prior art, the present invention is implemented through the following technical solutions:

[0006] A manned construction platform is provided under a steel truss which is easy to disassemble and assemble, comprising a bridge truss and a supporting platform, wherein a supporting rail is provided at the bottom of the bridge truss, and there are two groups of supporting rails, which are distributed on both sides of the bottom of the bridge truss, and an installation groove is provided inside the supporting rail, and an assembly notch is provided at at least one end of the supporting rail, and the assembly notch is communicated with the installation groove;

[0007] A plurality of groups of support seats are fixedly installed on the side of the support platform, and the support seats are installed on the side of the support platform corresponding to the two groups of support rails. The support seats on both sides of the support platform correspond to each other in the width direction of the bridge truss. A connecting swivel seat that can rotate relative to the supporting seat is arranged inside the supporting seat, and a supporting rod is fixedly installed on the surface of the connecting swivel seat. A rod body is arranged at the upper end of the supporting rod, and a connecting plate is installed at the upper end of the rod body. The connecting plate is slidably matched with the mounting groove inside the supporting rail through a hanging plate.

[0008] A driving mechanism for driving the connecting plate to move is provided inside the supporting rail. When the connecting swivel seat and the supporting seat are in a relative rotation state, the driving mechanism cannot drive the connecting plate to move. When multiple groups of connecting swivel seats and corresponding supporting seats are in a fixed state, the driving mechanism can drive the connecting plate to move.

[0009] Furthermore, an inner sleeve is axially slidably installed inside the rod body at the upper end of the support rod, and a matching channel is opened inside the support seat. The inner sleeve can extend into the matching channel through the connecting swivel seat. When the lower end of the inner sleeve can enter the matching channel, the inner sleeve is perpendicular to the surface of the support platform. When the lower end of the inner sleeve enters the matching channel, the connecting swivel seat and the support seat are in a relatively fixed state.

[0010] The upper surface of the connecting plate is fixedly mounted with a driving seat, the interior of the driving seat is slidably mounted with a mounting seat, a return spring is provided between the mounting seat and the driving seat, a plurality of driven tooth plates are rotatably mounted on the upper surface of the mounting seat, a spring is provided between the driven tooth plate and the upper surface of the mounting seat, a limit baffle is provided on the rear side of the teeth of the driven tooth plate, the driving mechanism is a toothed belt installed inside the supporting rail, the toothed belt is a closed belt, pulleys are provided inside the two ends of the supporting rail, the toothed belt sleeves are arranged on the surface of the pulley, when the mounting seat moves in the direction close to the toothed belt, the driven tooth plate can mesh with the toothed belt, when the driven tooth plate meshes with the toothed belt, the movement of the toothed belt is used to drive the supporting platform to move;

[0011] A connecting channel is provided below the mounting seat, the lower end of the mounting seat is slidingly sealed and installed inside the connecting channel, a through pipe is provided inside the inner sleeve, the through pipe is communicated with the connecting channel, the upper end of the inner sleeve is connected to the connecting channel through a retractable hose, a sealing cavity and a plurality of sealing tubes are provided inside the supporting platform, one sealing tube corresponds to one inner sleeve, and the sealing cavity can be communicated with a plurality of through pipes respectively through the plurality of sealing tubes;

[0012] After the inner sleeve moves to the matching channel, the air pressure in the sealing chamber is increased by continuing to move in the same direction of the inner sleeve, and the sealing tube is connected to the inner sleeve. The inner sleeve applies pressure to the connecting channel, and the pressure inside the connecting channel pushes the mounting seat to move in the direction of the toothed belt, so that the driven tooth plate engages with the toothed belt.

[0013] Further, the lower end of the matching channel is connected to a pneumatic channel, the lower end of the inner sleeve is slidably sealed with the pneumatic channel, the pneumatic channel is connected to the sealing cavity, a sealing plate is slidably installed inside the pneumatic channel, and a return spring is provided between the sealing plate and the inner wall of the pneumatic channel;

[0014] The sealing tube extends into the interior of the air pressure channel, and one end of the sealing tube located in the air pressure channel is coaxially designed with the matching channel;

[0015] When the inner sleeve is not in contact with the sealing tube, the corresponding ports of the sealing tube and the inner sleeve are in a closed state, the sealing tube is adapted to the lower end of the through tube, and when the inner sleeve is in contact and connected with the sealing tube, the sealing tube is connected to the lower end of the through tube.

[0016] Furthermore, a second blocking block is rotatably installed in a port of the sealing tube at one end inside the air pressure channel, and a spring is provided between the second blocking block and the inner wall of the air pressure channel. When the second blocking block is in a blocking state, it cannot continue to rotate toward the outside of the air pressure channel.

[0017] An inner rod is fixedly installed inside the lower end of the through pipe, a blocking block is radially slidably installed in the port at the lower end of the inner sleeve, a spring is provided between the blocking block and the inner sleeve, and the side of the blocking block close to the sealing tube is a wedge-shaped surface.

[0018] Furthermore, the through pipe of the inner sleeve is composed of an upper channel and a lower channel, a sealing block is sealingly and slidably installed inside the lower end of the upper channel, and the interiors of the upper channel and the connecting channel are filled with hydraulic oil.

[0019] Furthermore, the rod body at the upper end of the support rod is composed of a rotating rod 1 and a rotating rod 2, wherein the rotating rod 1 is rotatably connected to the support rod, and the rotating rod 2 is rotatably connected to the connecting plate;

[0020] The inner sleeve is axially slidably installed inside the rotating rod 1 and the rotating rod 2, and the lower end of the inner sleeve is axially slidably installed inside the supporting rod;

[0021] The inner annular surfaces of the rotating rod 1 and the rotating rod 2 are both provided with guide grooves, and the guide grooves are composed of straight grooves and arc grooves. The guide grooves inside the rotating rod 1 are arc grooves and straight grooves from top to bottom, and the guide grooves inside the rotating rod 2 are straight grooves and arc grooves from top to bottom.

[0022] Two guide posts are provided on the surface of the inner sleeve, and the two guide posts are respectively located in the guide grooves of the inner annular surfaces of the rotating rod 1 and the rotating rod 2, wherein one guide post is located in the straight groove and the other guide post is located in the corresponding arc groove.

[0023] Further, the connecting swivel is disc-shaped, a semicircular groove is provided inside the supporting seat, an annular transfer slider is provided on the surface of the connecting swivel, a semicircular transfer slide groove is provided inside the supporting seat, the transfer slider is cooperatively installed in the transfer slide groove, and the connecting swivel is rotatably installed in the semicircular groove;

[0024] The annular surface of the connecting rotating seat corresponding to the semicircular groove is provided with an arc-shaped limiting tooth groove, the interior of the supporting seat is provided with a cavity, and the interior of the cavity is radially slidably installed with an arc-shaped limiting tooth piece, and the limiting tooth piece can mesh with the limiting tooth groove when moving radially;

[0025] A sliding rod is provided for sliding inside the cavity, a spring is provided between the sliding rod and the inner wall of the cavity, a wedge-shaped portion is provided at one end of the sliding rod, and the wedge-shaped portion can extend into the matching channel, a push rod is provided inside the cavity, and the push rod is composed of two connecting rods rotatably connected, one end of the push rod is rotatably connected to the limiting tooth plate, and the other end is rotatably connected to the inner wall of the cavity, a sliding groove is provided on the surface of the sliding rod, and the connecting shafts of the two connecting rods extend into the inside of the sliding groove.

[0026] Furthermore, an inverted T-shaped support rail is provided inside the mounting groove, and auxiliary support parts are provided on both sides below the support rail;

[0027] Two hanging plates are rotatably mounted on the upper surface of the connecting plate, an operating plate is fixedly mounted on the lower side of the hanging plate, and a guide wheel is rotatably mounted on the inner side of the upper end of the hanging plate, and the guide wheel is adapted to the supporting guide rail;

[0028] The hanging plate is composed of two vertical plates and an arc-shaped plate, the arc-shaped plate is connected between the two vertical plates, and the outer side surface of the arc-shaped plate corresponds to the auxiliary support portion;

[0029] The lower side belt of the toothed belt is installed on the lower surface of the supporting guide rail, the driving seat is located between the two hanging plates, and a spring is arranged between the hanging plate and the driving seat.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. The steel truss which is easy to disassemble and assemble is provided with a manned construction platform. Through the design of the support seat and the connecting swivel seat and the combined design of the upper end rod body of the support rod through the connecting plate and the hanging plate and the assembly groove and the installation groove in the support rail, when it is necessary to carry out construction work on the bottom of the bridge truss, it is convenient to erect and install the support platform at the bottom of the bridge truss, and it is also convenient to disassemble the support platform from the bottom of the bridge truss. At the same time, an inner sleeve is arranged inside the support rod, and the axial movement of the inner sleeve is used to limit the rotation of the connecting swivel seat relative to the support seat. Then, the axial movement of the inner sleeve is used to control the driving mechanism to drive the support platform to move, so as to avoid the support platform from shaking when the construction personnel are working or the support platform is moving, so as to improve the stability of the support platform when in use.

[0032] 2. A manned construction platform is arranged under the steel truss which is easy to assemble and disassemble. The driving mechanism is controlled by the axial movement of multiple inner sleeves to drive the movement of the support platform. When multiple people are working, multiple people can control the axial movement of the inner sleeves respectively to avoid the movement of the support platform when some construction workers are working. This ensures the normal construction work of the construction workers, while ensuring the balance of the construction workers and improving the construction safety.

[0033] 3. A manned construction platform is set under the steel truss which is easy to disassemble and assemble. Through the combined design of the hanging plate and guide wheel on the upper surface of the connecting plate and the assembly groove, the support guide rail and the auxiliary support part, it is convenient for the installation, coordination or disassembly of the hanging plate and the support rail, and at the same time, it can realize the secondary support protection of the support platform, increase the anti-fall function of the support platform, so as to improve the safety of the support platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural stereogram of the present invention;

[0035] Figure 2 It is a schematic diagram of the partial structure of the present invention Figure 1 ;

[0036] Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0037] Figure 4 It is a schematic diagram of the partial structure of the present invention Figure 2 ;

[0038] Figure 5 For the present invention Figure 4 A schematic diagram of the enlarged structure at B in the middle;

[0039] Figure 6 It is a schematic diagram of the partial structure of the present invention Figure 3 ;

[0040] Figure 7 It is a schematic diagram of the partial structure of the present invention Figure 4 ;

[0041] Figure 8 For the present invention Figure 7 Schematic diagram of the enlarged structure at C in the middle;

[0042] Fig. 9 It is a schematic diagram of the partial structure of the present invention Figure 5 ;

[0043] Fig.10 It is a schematic diagram of the partial structure of the present invention Figure 6 ;

[0044] Fig.11 For the present invention Fig.10 Schematic diagram of the enlarged structure at D in the middle;

[0045] Fig.12 It is a partial structural cross-sectional view of the inner sleeve and the sealing tube of the present invention (when the inner sleeve and the sealing tube are not connected);

[0046] Fig.13 This is a schematic diagram of the distribution and coordination of the air pressure channel, the sealing cavity and the sealing tube inside the support platform of the present invention;

[0047] Fig.14 It is a schematic diagram of the cooperation structure of the rotating rod 1 and the rotating rod 2 with the guide pillar on the surface of the inner sleeve and the unfolded structure of the inner ring surface of the rotating rod 1 and the rotating rod 2 of the present invention.

[0048] In the figure: 1, bridge truss; 2, support rail; 21, mounting groove; 211, support rail; 212, auxiliary support part; 22, assembly notch; 23, toothed belt; 3, support platform; 4, support seat; 41, limit tooth piece; 42, slide bar; 421, wedge-shaped part; 43, top rod; 44, matching channel; 5, support rod; 51, connecting swivel seat; 511, limit tooth groove; 6, swivel rod 1; 7, swivel rod 2; 8, connecting plate; 9. Hanging plate; 91. Operating panel; 92. Guide wheel; 10. Driving seat; 101. Mounting seat; 102. Driven gear plate; 103. Limit baffle; 11. Connecting channel; 12. Inner sleeve; 121. Upper channel; 1211. Sealing block; 122. Lower channel; 1221. Inner rod; 1222. Block 1; 13. Air pressure channel; 131. Sealing plate; 14. Sealing chamber; 15. Sealing tube; 151. Block 2. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] The embodiment of the manned construction platform provided under the steel truss which is easy to disassemble and assemble is as follows:

[0051] See also Figure 1-Figure 14 A steel truss with easy disassembly and assembly is provided with a manned construction platform, comprising a bridge truss 1 and a supporting platform 3. A supporting rail 2 is provided at the bottom of the bridge truss 1. There are two groups of supporting rails 2, which are distributed on both sides of the bottom of the bridge truss 1. An installation groove 21 is provided inside the supporting rail 2. An assembly groove 22 is provided at at least one end of the supporting rail 2. The assembly groove 22 is connected to the installation groove 21. An inverted T-shaped supporting guide rail 211 is provided inside the installation groove 21, and auxiliary supporting parts 212 are provided on both sides below the supporting guide rail 211.

[0052] A plurality of groups of support seats 4 are fixedly installed on the side of the support platform 3. The support seats 4 are installed on the sides of the support platform 3 corresponding to the two groups of support rails 2. The support seats 4 on both sides of the support platform 3 correspond one to one in the width direction of the bridge truss 1. A connecting swivel seat 51 that can rotate relative to the supporting seat 4 is provided inside. A support rod 5 is fixedly installed on the surface of the connecting swivel seat 51. A rod body is provided at the upper end of the support rod 5, and a connecting plate 8 is installed at the upper end of the rod body.

[0053] Two hanging plates 9 are rotatably installed on the upper surface of the connecting plate 8. The hanging plates 9 are installed in the mounting groove 21 from the position of the mounting groove 22, or are removed from the position of the mounting groove 22. The connecting plate 8 slides with the mounting groove 21 inside the support rail 2 through the hanging plates 9. An operating plate 91 is fixedly installed on the lower side of the hanging plate 9. A guide wheel 92 is rotatably installed on the inner side of the upper end of the hanging plate 9. The guide wheel 92 is adapted to the support rail 211. The hanging plate 9 is driven to rotate by pressing the operating plate 91 so as to assemble the guide wheel 92 at the upper end of the hanging plate 9 on the support rail 211.

[0054] like Figure 2 , Figure 8 , Fig. 9 As shown, the hanging plate 9 is composed of two vertical plates and an arc plate. The arc plate is connected between the two vertical plates. The outer side surface of the arc plate corresponds to the auxiliary support part 212. The structural design of the auxiliary support part 212 and the hanging plate 9 can not only assist in supporting the guide wheel 92 at the upper end of the hanging plate 9 to cooperate with the support rail 211, but also when the guide wheel 92 accidentally detaches from the support rail 211, the auxiliary support part 212 can still support the hanging plate 9 to ensure the secondary support anti-fall protection of the support platform 3.

[0055] A driving seat 10 is fixedly installed on the upper surface of the connecting plate 8, and the driving seat 10 is located between the two hanging plates 9. A spring is provided between the hanging plates 9 and the driving seat 10. A mounting seat 101 is slidably installed inside the driving seat 10, and a return spring is provided between the mounting seat 101 and the driving seat 10. A plurality of driven tooth plates 102 are rotatably installed on the upper surface of the mounting seat 101, and a spring is provided between the driven tooth plate 102 and the upper surface of the mounting seat 101. A limit baffle 103 is provided on the rear side of the teeth of the driven tooth plate 102, and the limit baffle 103 is used to limit the rotation range of the driven tooth plate 102.

[0056] A driving mechanism for driving the connecting plate 8 to move is provided inside the support rail 2. The driving mechanism is a toothed belt 23 installed inside the support rail 2. The lower belt of the toothed belt 23 is installed on the lower surface of the support guide rail 211. The toothed belt 23 is a closed belt. Pulleys are provided inside both ends of the support rail 2. The toothed belt 23 is sleeved on the surface of the pulley. The pulley is driven by a motor to rotate, and the toothed belt 23 is driven to move by the cooperation of the two pulleys. When the mounting seat 101 moves toward the direction close to the toothed belt 23, the driven tooth plate 102 can engage with the toothed belt 23. When the driven tooth plate 102 engages with the toothed belt 23, the movement of the toothed belt 23 is used to drive the support platform 3 to move.

[0057] An inner sleeve 12 is axially slidably installed inside the rod body. The rod body at the upper end of the support rod 5 is composed of a rotating rod 1 6 and a rotating rod 2 7. The rotating rod 1 6 is rotatably connected to the support rod 5, and the rotating rod 2 7 is rotatably connected to the connecting plate 8. The inner sleeve 12 is axially slidably installed inside the rotating rod 1 6 and the rotating rod 2 7, and its lower end is axially slidably installed inside the support rod 5.

[0058] The inner ring surfaces of the rotating rod 1 6 and the rotating rod 2 7 are both provided with guide grooves, which are composed of straight grooves and arc grooves. The guide grooves inside the rotating rod 1 6 are arc grooves and straight grooves from top to bottom, and the guide grooves inside the rotating rod 2 7 are straight grooves and arc grooves from top to bottom.

[0059] Two guide posts are provided on the surface of the inner sleeve 12, and the two guide posts are respectively located in the guide grooves of the inner annular surfaces of the rotating rod 1 6 and the rotating rod 2 7, one of which is located in the straight groove and the other is located in the corresponding arc groove.

[0060] A matching channel 44 is provided inside the support seat 4 , and the inner sleeve 12 can extend into the matching channel 44 by connecting to the rotating seat 51 . When the lower end of the inner sleeve 12 enters the matching channel 44 , the inner sleeve 12 is perpendicular to the surface of the support platform 3 .

[0061] The connecting swivel seat 51 is disc-shaped, a semicircular groove is provided inside the supporting seat 4, an annular transfer slider is provided on the surface of the connecting swivel seat 51, a semicircular transfer slide groove is provided inside the supporting seat 4, the transfer slider is installed in the transfer slide groove, and the connecting swivel seat 51 is rotatably installed in the semicircular groove.

[0062] An arc-shaped limiting tooth groove 511 is provided on the annular surface corresponding to the semicircular groove of the connecting swivel seat 51, and a cavity is provided inside the supporting seat 4, and an arc-shaped limiting tooth piece 41 is radially slidably installed inside the cavity. The limiting tooth piece 41 can engage with the limiting tooth groove 511 when it moves radially. When the limiting tooth piece 41 engages with the limiting tooth groove 511, the connecting swivel seat 51 cannot rotate.

[0063] A sliding rod 42 is provided inside the cavity for sliding, a spring is provided between the sliding rod 42 and the inner wall of the cavity, a wedge-shaped portion 421 is provided at one end of the sliding rod 42, and the wedge-shaped portion 421 can extend into the matching channel 44, a push rod 43 is provided inside the cavity, and the push rod 43 is composed of two connecting rods rotatably connected, one end of the push rod 43 is rotatably connected to the limiting tooth plate 41, and the other end is rotatably connected to the inner wall of the cavity, a sliding groove is provided on the surface of the sliding rod 42, and the connecting shafts of the two connecting rods extend to the inside of the sliding groove.

[0064] After the lower end of the inner sleeve 12 enters the matching channel 44, the inner sleeve 12 contacts the wedge-shaped portion 421, thereby pushing the slide rod 42 to slide. The slide rod 42 drives the two connecting rods in the top rod 43 to rotate through the slide groove. The rotation of the two rotating rods drives the limiting tooth piece 41 to slide radially until the limiting tooth piece 41 engages with the limiting tooth groove 511. The limiting tooth piece 41 and the limiting tooth groove 511 cooperate to limit the rotation of the connecting swivel 51, which can increase the stability of the connecting swivel 51 relative to the support seat 4. In this state, the inner sleeve 12 can move axially. Therefore, when the lower end of the inner sleeve 12 enters the matching channel 44, the connecting swivel 51 and the support seat 4 are in a relatively fixed state.

[0065] A connecting channel 11 is provided below the mounting seat 101, and the lower end sliding seal of the mounting seat 101 is installed inside the connecting channel 11. A through pipe is provided inside the inner sleeve 12, and the through pipe is connected to the connecting channel 11. The upper end of the inner sleeve 12 is connected to the connecting channel 11 through a retractable hose, and the through pipe consists of an upper channel 121 and a lower channel 122.

[0066] A sealing block 1211 is slidably installed inside the lower end of the upper channel 121, and the sealing block 1211 cannot enter the lower channel 122. The interiors of the upper channel 121 and the connecting channel 11 are filled with hydraulic oil. The hydraulic oil is filled inside the upper channel 121 and the connecting channel 11 to reduce the compression of the internal space of the upper channel 121 and the connecting channel 11.

[0067] A sealed cavity 14 and a plurality of sealed tubes 15 are provided inside the support platform 3 . One sealed tube 15 corresponds to one inner sleeve 12 . The sealed cavity 14 can be connected to a plurality of through tubes respectively through the plurality of sealed tubes 15 .

[0068] The lower end of the matching channel 44 is connected to the air pressure channel 13, the lower end of the inner sleeve 12 is slidingly sealed with the air pressure channel 13, the air pressure channel 13 is connected to the sealing chamber 14, and the internal sealing sliding installation of the air pressure channel 13 is a sealing plate 131, and a return spring is provided between the sealing plate 131 and the inner wall of the air pressure channel 13. When the inner sleeve 12 moves into the air pressure channel 13, the gas is squeezed, thereby increasing the air pressure inside the sealing chamber 14.

[0069] The sealing tube 15 extends into the air pressure channel 13 , and one end of the sealing tube 15 located at the air pressure channel 13 is coaxially designed with the matching channel 44 , so as to facilitate the connection between the through pipe of the inner sleeve 12 and the sealing tube 15 .

[0070] A second blocking block 151 is rotatably installed in the port of the sealing tube 15 located at one end inside the air pressure channel 13. A spring is provided between the second blocking block 151 and the inner wall of the air pressure channel 13. When the second blocking block 151 is in the blocking state, the second blocking block 151 cannot continue to rotate toward the outside of the air pressure channel 13.

[0071] An inner rod 1221 is fixedly installed inside the lower end of the inner sleeve 12 through pipe, and a blocking block 1222 is radially slidably installed in the port at the lower end of the inner sleeve 12. A spring is provided between the blocking block 1222 and the inner sleeve 12. The side of the blocking block 1222 close to the sealing tube 15 is a wedge-shaped surface. When the sealing tube 15 enters the through pipe, the sealing tube 15 pushes away the blocking block 1222, and the inner rod 1221 pushes away the blocking block 2 151. At this time, the sealing tube 15 is connected to the through pipe.

[0072] When the inner sleeve 12 is not in contact with the sealing tube 15, the corresponding ports of the sealing tube 15 and the inner sleeve 12 are in a closed state, which is used to ensure the original pressure inside the through tube of the inner sleeve 12 and the sealing tube 15. At the same time, when the inner sleeve 12 moves toward the sealing tube 15, it is convenient for the inner sleeve 12 to squeeze the gas inside the air pressure channel 13. The sealing tube 15 is adapted to the lower end of the through tube. When the inner sleeve 12 is in contact and connected with the sealing tube 15, the sealing tube 15 is connected to the lower end of the through tube, so that the high-pressure gas inside the sealed cavity 14 enters the through tube through the sealing tube 15.

[0073] Therefore, after the inner sleeve 12 moves to the matching channel 44, the inner sleeve 12 continues to move in the same direction to increase the air pressure in the sealing chamber 14, and connects the sealing tube 15 with the sealing chamber 14, until all the inner sleeves 12 apply pressure to the gas inside the sealing chamber 14, and the pressure inside the connecting channel 11 pushes the mounting seat 101 to move in the direction of the toothed belt 23, so that the driven tooth plate 102 engages with the toothed belt 23.

[0074] When the air pressure inside the lower channel 122 changes, the pressure inside the connecting channel 11 will change accordingly. The design of the changes in the air pressure inside the air pressure channel 13, the sealing cavity 14 and the sealing tube 15 can ensure that the inner sleeve 12 has a certain axial movement space. At the same time, after the air pressure inside the lower channel 122 changes by a set amount, the hydraulic oil inside the upper channel 121 and the connecting channel 11 can drive the mounting seat 101 to move.

[0075] The guide grooves of the rotating rod 1 6 and the rotating rod 2 7 cooperate with the guide pillars on the surface of the inner sleeve 12. When using the support platform 3, it is necessary to rotate the rotating rod 1 6 first to move the inner sleeve 12 downward to set the stroke. This process is used to make the connecting rotating seat 51 and the support seat 4 in a relatively fixed state to prevent the support platform 3 from shaking. Only after completing this process can the support platform 3 be driven to move, and then the rotating rod 2 7 can be rotated to make the inner sleeve 12 move further downward. This process is used to increase the air pressure inside the sealing chamber 14. At the same time, only when all the rotating rods 2 7 are rotated can the air pressure inside the sealing chamber 14 be increased. The air pressure is sufficient to move the mounting seat 101 upward through the hydraulic oil in the upper channel 121 and the connecting channel 11, so that the driven tooth plate 102 can engage with the toothed belt 23. This design is used when multiple people stand on the surface of the supporting platform 3 at the same time to construct the bridge truss 1. In this way, multiple people control the rotation of multiple rotating rods 7 respectively, so that the construction progress of multiple construction workers can be kept consistent, avoiding the situation where the supporting platform 3 is suddenly controlled to move when some construction workers are working, which not only affects the normal construction work of the construction workers, but also affects the balance of the construction workers, posing certain safety hazards.

[0076] When the connecting swivel seat 51 and the supporting seat 4 are in a relative rotation state, the driving mechanism cannot drive the connecting plate 8 to move. In this state, it is convenient to rotate the supporting rod 5 and the rod body at its upper end, so as to facilitate the installation of the hanging plate 9 in the mounting groove 21 or the removal of the hanging plate 9. When multiple sets of connecting swivel seats 51 and the corresponding supporting seats 4 are in a fixed state, the driving mechanism can drive the connecting plate 8 to move. After the hanging plate 9 is installed in the mounting groove 21, in this state, the driving mechanism is used to drive and control the movement of the supporting platform 3.

[0077] Working principle of the manned construction platform under the bridge steel truss:

[0078] Before the support platform 3 is installed in the support rail 2, the inner sleeve 12 has not yet entered the matching channel 44. At this time, the connecting swivel 51 can rotate in the support seat 4. The rotatable state of the connecting swivel 51 makes it convenient for the support platform 3 to be placed under the bridge truss 1. By pressing the operating plate 91, the hanging plate 9 is rotated outward to increase the distance between the two hanging plates 9 on the upper surface of the connecting plate 8. Then, the hanging plate 9 is placed in the installation groove 21 from the position of the assembly notch 22, and the two guide wheels 92 are matched with the support guide rail 211. According to this operation method, the hanging plates 9 at the upper ends of the rods on both sides of the support platform 3 are assembled into the installation groove 21.

[0079] Then rotate the rotating rod 6, and use the guide groove on the inner ring surface of the rotating rod 6 to drive the inner sleeve 12 to move downward, so that the lower end of the inner sleeve 12 enters the matching channel 44. When the inner sleeve 12 contacts the wedge-shaped portion 421, the sliding rod 42 is pushed to move, so that the limiting tooth piece 41 engages with the limiting tooth groove 511. At this time, the connecting seat 51 and the support seat 4 are in a relatively fixed state. The other rotating rods 6 are operated in the same way to keep the support platform 3 in a balanced and stable state to prevent the support platform 3 from shaking.

[0080] After the above operation is completed, the driving mechanism inside the support rail 2 cannot drive the support platform 3 to move. When it is necessary to adjust the position of the support platform 3 below the bridge truss 1, the rotating rod 2 7 is rotated, and the guide groove on the inner ring surface of the rotating rod 2 7 is used to drive the inner sleeve 12 to continue to move downward, so that the lower end of the inner sleeve 12 enters the air pressure channel 13, and the downward movement of the inner sleeve 12 is used to increase the air pressure inside the sealing chamber 14. The same method is used to operate other rotating rods 2 7 at the same time until all the rotating rods 2 7 are rotated to make the corresponding The inner sleeve 12 exerts a squeezing effect on the gas inside the sealed chamber 14. At this time, the air pressure inside the sealed chamber 14 can act on the connecting channel 11 through the through pipe inside the inner sleeve 12, and push the mounting seat 101 to move upward. The mounting seat 101 drives the driven gear plate 102 to move, so that the driven gear plate 102 engages with the toothed belt 23. At this time, the motor inside the support rail 2 is started, and the motor and the pulley are used to drive the toothed belt 23 to run. The toothed belt 23 cooperates with the driven gear plate 102 to drive the support platform 3 to move.

[0081] When the rotating rod 27 is rotated in the opposite direction, the corresponding inner sleeve 12 moves upward, the air pressure inside the sealing chamber 14 decreases, the mounting seat 101 moves toward the inside of the driving seat 10, and the driven tooth plate 102 is separated from the toothed belt 23. When the toothed belt 23 is running, the toothed belt 23 cannot drive the support platform 3 to move. With this design, multiple groups of support platforms 3 can be set up under the bridge truss 1. Through the operation of the toothed belt 23, the multiple groups of support platforms 3 can be driven and moved separately.

[0082] By rotating the second rotating rod 7 and the first rotating rod 6 in sequence to reset the inner sleeve 12, the hanging plate 9 can be removed from the position of the assembly groove 22, so that the supporting platform 3 can be disassembled from the bottom of the bridge truss 1 as a whole.

Claims

1. A steel truss with a manned construction platform provided underneath that is easy to assemble and disassemble, comprising a bridge truss (1) and a supporting platform (3), characterized in that: A support rail (2) is provided at the bottom of the bridge truss (1), a mounting groove (21) is provided inside the support rail (2), and an assembly notch (22) is provided at at least one end of the support rail (2), and the assembly notch (22) is communicated with the mounting groove (21); A plurality of groups of support seats (4) are fixedly mounted on the side of the support platform (3); a connecting swivel seat (51) capable of rotating relative to the supporting seat (4) is arranged inside the supporting seat (4); a support rod (5) is fixedly mounted on the surface of the connecting swivel seat (51); a rod body is arranged at the upper end of the supporting rod (5); a connecting plate (8) is mounted at the upper end of the rod body; the connecting plate (8) is slidably matched with the mounting groove (21) inside the supporting rail (2) via a hanging plate (9); A driving mechanism for driving the connecting plate (8) to move is provided inside the supporting rail (2); when the connecting rotating seat (51) and the supporting seat (4) are in a relatively rotating state, the driving mechanism cannot drive the connecting plate (8) to move; when multiple groups of the connecting rotating seats (51) and the corresponding supporting seats (4) are in a fixed state, the driving mechanism can drive the connecting plate (8) to move; An inner sleeve (12) is axially slidably mounted inside the upper end of the support rod (5), a matching channel (44) is provided inside the support seat (4), and the inner sleeve (12) can extend into the matching channel (44) through the connecting swivel seat (51); A driving seat (10) is fixedly mounted on the upper surface of the connecting plate (8); a mounting seat (101) is slidably mounted inside the driving seat (10); a plurality of driven tooth plates (102) are rotatably mounted on the upper surface of the mounting seat (101); the driving mechanism is a toothed belt (23) mounted inside the supporting rail (2); when the mounting seat (101) moves in a direction close to the toothed belt (23), the driven tooth plates (102) can mesh with the toothed belt (23); A connecting channel (11) is provided below the mounting seat (101); a through pipe is provided inside the inner sleeve (12), the through pipe is communicated with the connecting channel (11); a sealed cavity (14) and a plurality of sealed tubes (15) are provided inside the support platform (3); the sealed cavity (14) can be communicated with a plurality of through pipes respectively through the plurality of sealed tubes (15); After the inner sleeve (12) moves to the matching channel (44), the air pressure in the sealing chamber (14) is increased by the inner sleeve (12) continuing to move in the same direction, and the sealing tube (15) is connected to the inner sleeve (12). The inner sleeve (12) applies pressure to the connecting channel (11), and the pressure inside the connecting channel (11) pushes the mounting seat (101) to move in the direction of the toothed belt (23), so that the driven tooth plate (102) is meshed with the toothed belt (23).

2. According to claim 1, a manned construction platform is provided under the easily disassembled steel truss, characterized in that: The lower end of the matching channel (44) is connected to a pneumatic channel (13), the pneumatic channel (13) is connected to the sealing cavity (14), a sealing plate (131) is slidably installed inside the pneumatic channel (13), and a return spring is provided between the sealing plate (131) and the inner wall of the pneumatic channel (13); The sealing tube (15) extends into the interior of the air pressure channel (13), and is located at one end of the air pressure channel (13) and is coaxially designed with the matching channel (44); When the inner sleeve (12) is not in contact with the sealing tube (15), the corresponding ports of the sealing tube (15) and the inner sleeve (12) are both in a closed state; when the inner sleeve (12) is in contact with the sealing tube (15), the sealing tube (15) is in communication with the lower end of the through tube.

3. According to claim 2, the steel truss that is easy to assemble and disassemble is provided with a manned construction platform, which is characterized in that: A second blocking block (151) is rotatably mounted in a port at one end of the sealing tube (15) located inside the air pressure channel (13); An inner rod (1221) is fixedly mounted inside the lower end of the through pipe, and a blocking block (1222) is radially slidably mounted in the port at the lower end of the inner sleeve (12), wherein the side of the blocking block (1222) close to the sealing tube (15) is a wedge-shaped surface.

4. According to claim 3, a manned construction platform is provided under the easily disassembled steel truss, characterized in that: The through pipe of the inner sleeve (12) is composed of an upper channel (121) and a lower channel (122); a sealing block (1211) is sealingly and slidably mounted inside the lower end of the upper channel (121); and the interiors of the upper channel (121) and the connecting channel (11) are both filled with hydraulic oil.

5. A manned construction platform is provided under the easily disassembled steel truss according to any one of claims 1 to 4, characterized in that: The rod body at the upper end of the support rod (5) is composed of a rotating rod 1 (6) and a rotating rod 2 (7), wherein the rotating rod 1 (6) is rotatably connected to the support rod (5), and the rotating rod 2 (7) is rotatably connected to the connecting plate (8); The inner sleeve (12) is axially slidably mounted inside the first rotating rod (6) and the second rotating rod (7), and the lower end thereof is axially slidably mounted inside the support rod (5); The inner annular surfaces of the rotating rod 1 (6) and the rotating rod 2 (7) are both provided with guide grooves, the guide grooves being composed of straight grooves and arcuate grooves. The guide grooves inside the rotating rod 1 (6) are arcuate grooves and straight grooves from top to bottom, and the guide grooves inside the rotating rod 2 (7) are straight grooves and arcuate grooves from top to bottom. The surface of the inner sleeve (12) is provided with two guide posts, which are respectively located in guide grooves on the inner annular surfaces of the rotating rod 1 (6) and the rotating rod 2 (7), one of which is located in a straight groove and the other is located in a corresponding arc groove.

6. According to claim 5, a manned construction platform is provided under the easily disassembled steel truss, characterized in that: The connecting rotating seat (51) is disc-shaped, and a semicircular groove is provided inside the supporting seat (4), and the connecting rotating seat (51) is rotatably mounted in the semicircular groove; The connecting seat (51) is provided with an arc-shaped limiting tooth groove (511) on the annular surface corresponding to the semicircular groove, the support seat (4) is provided with a cavity inside, and an arc-shaped limiting tooth piece (41) is radially slidably installed inside the cavity, and the limiting tooth piece (41) can mesh with the limiting tooth groove (511) when moving radially; A sliding rod (42) is slidably arranged inside the cavity, and a wedge-shaped portion (421) is arranged at one end of the sliding rod (42), and the wedge-shaped portion (421) can extend into the matching channel (44). A push rod (43) is arranged inside the cavity, and the push rod (43) is composed of two connecting rods rotatably connected, one end of the push rod (43) is rotatably connected to the limiting tooth plate (41), and the other end is rotatably connected to the inner wall of the cavity. A sliding groove is arranged on the surface of the sliding rod (42), and the connecting shafts of the two connecting rods extend into the interior of the sliding groove.

7. According to claim 6, the steel truss that is easy to assemble and disassemble is provided with a manned construction platform, characterized in that: An inverted T-shaped support rail (211) is provided inside the installation groove (21), and auxiliary support portions (212) are provided on both sides below the support rail (211); Two hanging plates (9) are rotatably mounted on the upper surface of the connecting plate (8), and a guide wheel (92) is rotatably mounted on the inner side of the upper end of the hanging plate (9), wherein the guide wheel (92) is adapted to the supporting guide rail (211); The hanging plate (9) is composed of two vertical plates and an arc-shaped plate, the arc-shaped plate is connected between the two vertical plates, and the outer side surface of the arc-shaped plate corresponds to the auxiliary support portion (212); The lower belt of the toothed belt (23) is mounted on the lower surface of the support guide rail (211), and the drive seat (10) is located between the two hanging plates (9).

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