CN212962428U - Fractionating tower structure in air separation equipment - Google Patents

Fractionating tower structure in air separation equipment Download PDF

Info

Publication number
CN212962428U
CN212962428U CN202021966681.4U CN202021966681U CN212962428U CN 212962428 U CN212962428 U CN 212962428U CN 202021966681 U CN202021966681 U CN 202021966681U CN 212962428 U CN212962428 U CN 212962428U
Authority
CN
China
Prior art keywords
rod
block
tower
hollow
central rod
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202021966681.4U
Other languages
Chinese (zh)
Inventor
何东林
王军
朱可嘉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kaifeng Dear Air Separation Industrial Co ltd
Original Assignee
Kaifeng Dear Air Separation Industrial Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kaifeng Dear Air Separation Industrial Co ltd filed Critical Kaifeng Dear Air Separation Industrial Co ltd
Priority to CN202021966681.4U priority Critical patent/CN212962428U/en
Application granted granted Critical
Publication of CN212962428U publication Critical patent/CN212962428U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04406Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using a dual pressure main column system
    • F25J3/04412Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using a dual pressure main column system in a classical double column flowsheet, i.e. with thermal coupling by a main reboiler-condenser in the bottom of low pressure respectively top of high pressure column
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04763Start-up or control of the process; Details of the apparatus used
    • F25J3/04866Construction and layout of air fractionation equipments, e.g. valves, machines
    • F25J3/04896Details of columns, e.g. internals, inlet/outlet devices
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25JLIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
    • F25J3/00Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/04Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
    • F25J3/04763Start-up or control of the process; Details of the apparatus used
    • F25J3/04866Construction and layout of air fractionation equipments, e.g. valves, machines
    • F25J3/04945Details of internal structure; insulation and housing of the cold box

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Emergency Lowering Means (AREA)

Abstract

The utility model discloses a fractionating tower structure among air separation plant, including last tower and lower tower, go up tower lower extreme installation tower down, go up the tower and establish a plurality of corridor with lower tower surface cover altogether, and set up the protection network on the corridor, the building device is climbed in the installation of corridor left end, and the device is downstairs in the installation of corridor right-hand member. The utility model discloses a climb the building device and climb to go, firmly block in cooperation fixture block one through cooperation fixture block two, the user is withheld to protection rope one to the protection user, when climbing, climb down through the device of downstairs, block in well core rod two through the compact heap, prevent the user tenesmus, thereby the protection user.

Description

Fractionating tower structure in air separation equipment
Technical Field
The utility model relates to a fractionating tower structure, in particular to a fractionating tower structure in an air separation plant.
Background
The air separation equipment is equipment which takes air as a raw material, turns the air into liquid by a compression cycle deep freezing method, and gradually separates and produces inert gases such as oxygen, nitrogen, argon and the like from the liquid air by rectification. The existing fractionating tower is high, workers need to climb to a high place when maintaining or installing, the existing fractionating tower climbs up through a crawling ladder, if the workers climb to the high place and cannot support hands because of physical strength, consequences cannot be imagined, and the workers have certain dangerousness. Therefore, the utility model provides a fractionating tower structure among air separation plant to solve the problem that proposes among the above-mentioned background art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a fractionating tower structure among air separation plant to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
a fractionating tower structure in an air separation plant comprises an upper tower and a lower tower, wherein the lower tower is installed at the lower end of the upper tower, a plurality of corridors are sleeved on the outer surfaces of the upper tower and the lower tower, protective nets are arranged on the corridors, a climbing device is installed at the left end of each corridor, and a descending device is installed at the right end of each corridor;
the stair climbing device comprises a first central rod and a first side rod, wherein the left side and the right side of the first central rod are symmetrically provided with a first side rod, a first connecting rod is transversely installed between the first central rod and the first side rod, an anti-skidding sleeve is sleeved on the outer surface of the first connecting rod, a first sliding groove is vertically formed in the rear end of the first central rod, a plurality of first matching clamping blocks are symmetrically installed on the left side and the right side of the inner wall of the first central rod, a first hollow block is arranged in the first central rod, a first connecting block is installed at the front end of the first hollow block, a first fixing rod is vertically installed in the first connecting block, the first fixing rod is fixedly connected with the inner wall of the first central rod, a first sliding block is installed at the rear end of the first hollow block, a first protective rope is installed at the rear end of the first hollow block, a first threaded rod is vertically installed in the first hollow, the first extending block penetrates through two ends of the first hollow block, the first matching rods are symmetrically installed at the left end and the right end of the first threaded sleeve and are rotatably connected with one end of the first extending block, a plurality of second matching clamping blocks are installed at one end, away from the first hollow block, of the moving plate, the second matching clamping blocks are rotatably connected with the moving plate, and the second matching clamping blocks can only rotate towards one direction of the hollow block;
the downstairs device comprises a second central rod and a second lateral rod, the second lateral rod is symmetrically arranged on the left side and the right side of the second central rod, a second connecting rod is transversely installed between the second central rod and the second lateral rod, an anti-skidding sleeve is sleeved on the outer surface of the second connecting rod, a second sliding groove is vertically formed in the rear end of the second central rod, the inner wall of the second central rod inclines towards the middle, a second hollow block is arranged in the second central rod, a second connecting block is installed at the front end of the second hollow block, a second fixing rod is vertically installed in the second connecting block, the second fixing rod is fixedly connected with the inner wall of the second central rod, a second sliding block is installed at the rear end of the second hollow block and is located in the second sliding groove, a second protective rope is installed at the rear end of the second sliding block, a second threaded rod is vertically installed in the second hollow block, a second threaded sleeve is symmetrically sleeved on the upper surface and the lower, the pressing block is rotatably connected with the second extending block, the left end and the right end of the second threaded sleeve are symmetrically provided with a second matching rod, and the second matching rod is rotatably connected with the second extending block.
As a further scheme of the utility model, tower lower extreme installation fixed plate, the fixed cylinder of fixed plate upper end installation, and tower under the fixed cylinder fixed connection.
As a further aspect of the present invention, a plurality of bolts are installed on the outer surface of the fixing plate.
As the utility model discloses further scheme, two set up the fender rod between the side pole one, and the fender rod is the arc, set up the fender rod between the two side poles, and the fender rod is the arc.
As the utility model discloses the scheme of furthering again, threaded rod lower extreme installation bearing frame, two lower extreme installation bearing frames of threaded rod.
As the utility model discloses further scheme again, an upper end installation turning block of threaded rod, two upper ends installation turning blocks of threaded rod.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses a climb the building device and climb up, be the protection rope system in the waist, through cooperation fixture block two firmly the card in cooperation fixture block one, the user is withheld to protection rope one to the protection user when climbing, climbs down through the device of downstairs, is the waist with protection rope two systems, and the distance between the compact heap is just adjusted once to every certain distance of removal, when dropping, and the compact heap card prevents the user tenesmus in well core rod two, thereby protects the user.
Drawings
FIG. 1 is a schematic diagram of the structure of a fractionation column in an air separation plant.
FIG. 2 is a schematic diagram of a climbing-stair device in a fractionation tower configuration in an air separation plant.
FIG. 3 is a schematic diagram of a first connection block in a fractionation column configuration in an air separation plant.
FIG. 4 is a schematic diagram of a hollow block one of the fractionation tower structures in an air separation plant.
FIG. 5 is a schematic diagram of the structure of a downstairs unit in a fractionation column structure in an air separation plant.
FIG. 6 is a schematic diagram of a second connecting block in the structure of a fractionation column in an air separation plant.
FIG. 7 is a schematic diagram of the structure of hollow block two in the fractionation tower structure of an air separation plant.
In the figure: 1. feeding the tower; 2. descending the tower; 3. a corridor; 31. a fixed cylinder; 32. a fixing plate; 33. a bolt; 4. a stair climbing device; 41. a first side rod; 42. a first central rod; 43. a first sliding groove; 44. matching with the first clamping block; 45. a first connecting rod; 46. a first anti-slip sleeve; 5. a first connecting block; 51. fixing a rod I; 6. a first hollow block; 61. a first threaded rod; 62. sleeving a first thread; 63. a first matching rod; 64. a first extending block; 65. moving the plate; 66. matching with a second clamping block; 67. a first sliding block; 68. a first protection rope; 7. a downstairs device; 71. a second side rod; 72. a second central rod; 73. a second sliding groove; 74. a second connecting rod; 75. a second anti-slip sleeve; 8. a second connecting block; 81. a second fixing rod; 9. a hollow block II; 91. a second threaded rod; 92. a second thread sleeve; 93. a second matching rod; 94. a second extending block; 95. a compression block; 96. a second sliding block; 97. and a second protection rope.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1 to 7, in an embodiment of the present invention, a fractionating tower structure in an air separation plant includes an upper tower 1 and a lower tower 2, the lower tower 2 is installed at the lower end of the upper tower 1, a fixing plate 32 is installed at the lower end of the lower tower 2, a fixing cylinder 31 is installed at the upper end of the fixing plate 32, the fixing cylinder 31 is fixedly connected to the lower tower 2, a plurality of bolts 33 are installed on the outer surface of the fixing plate 32, a plurality of corridors 3 are sleeved on the outer surfaces of the upper tower 1 and the lower tower 2, a protective net is installed on the corridors 3, a stair climbing device 4 is installed at the left end of the corridors 3, the stair climbing device 4 includes a first central rod 42 and a first side rod 41, a first side rod 41 is symmetrically installed on the left and right sides of the central rod 42, a first connecting rod 45 is transversely installed between the central rod 42 and the first side rod 41, a first anti-slip sleeve 46, the protective rod is arc-shaped, a sliding groove I43 is vertically formed in the rear end of a central rod I42, a plurality of first matching clamping blocks 44 are symmetrically arranged on the left and right of the inner wall of the central rod I42, a hollow block I6 is arranged in the central rod I42, a connecting block I5 is arranged at the front end of the hollow block I6, a fixing rod I51 is vertically arranged in the connecting block I5, the fixing rod I51 is fixedly connected with the inner wall of the central rod I42, a sliding block I67 is arranged at the rear end of the hollow block I6, the sliding block I67 is positioned in the sliding groove I43, a protective rope I68 is arranged at the rear end of the sliding block I67, a vertical threaded rod I61 is arranged in the hollow block I6, a bearing seat is arranged at the lower end of the threaded rod I61, a rotating block is arranged at the upper end of the threaded rod I61, threaded sleeves I62 are symmetrically, the first extension block 64 penetrates through two ends of the first hollow block 6, the first matching rods 63 are symmetrically installed at the left end and the right end of the first thread sleeve 62, the first matching rods 63 are rotatably connected with the first extension block 64, the movable plate 65 is provided with a plurality of second matching clamping blocks 66 at the end far away from the first hollow block 6, the second matching clamping blocks 66 are rotatably connected with the movable plate 65, the second matching clamping blocks 66 can only rotate towards the first hollow block 6, the downstairs device 7 comprises a second central rod 72 and a second side rod 71, the left side and the right side of the second central rod 72 are symmetrically provided with the second side rod 71, a second connecting rod 74 is transversely installed between the second central rod 72 and the second side rod 71, the outer surface of the second connecting rod 74 is sleeved with a second anti-skidding sleeve 75, a second protection rod is arranged between the second side rods 71 on two sides, the protection rod is arc-shaped, the rear end of the second central rod 72 is provided with a second vertical sliding groove 73, the inner, the second connecting rod 81 is vertically installed in the second connecting block 8, the second connecting rod 81 is fixedly connected with the inner wall of the second middle rod 72, the second sliding block 96 is installed at the rear end of the second hollow block 9, the second sliding block 96 is located in the second sliding groove 73, the second sliding block 96 is installed at the rear end of the second sliding block 97, the second vertical threaded rod 91 is installed in the second hollow block 9, a bearing seat is installed at the lower end of the second threaded rod 91, a rotating block is installed at the upper end of the second threaded rod 91, the second threaded sleeve 92 is symmetrically sleeved on the outer surface of the second threaded rod 91 from top to bottom, pressing blocks 95 are symmetrically arranged at the left end and the right end of the second hollow block 9, an extending block 94 is installed at the position, close to one end of the second hollow block 9, the extending block 94 penetrates through the two hollow block 9, the pressing blocks 95 are rotatably connected with the extending block 94, matching.
The utility model discloses a theory of operation is: when climbing the upper tower 1 and the lower tower 2 for maintenance, climbing the tower by the stair climbing device 4, tying the first protection rope 68 between the waist, rotating the first threaded rod 61 to drive the first two threaded sleeves 62 to move outwards, driving the first threaded sleeve 62 to drive the second matched clamping block 66 to move towards the first matched clamping block 44 by the first matched rod 63, the first extended block 64 and the moving plate 65, climbing the user by the first connecting rod 45, if the user does not loose hands, firmly clamping the second matched clamping block 66 in the first matched clamping block 44, pulling the user by the first protection rope 68, protecting the user, climbing the tower by the lower tower device 7, tying the second protection rope 97 between the waist, rotating the second threaded rod 91 to drive the second two threaded sleeves 92 to move outwards, driving the pressing block 95 to move by the second matched rod 93 and the second extended block 94, adjusting the distance between the pressing blocks 95 once when moving for a certain distance, if the body force is not loosened, the distance between the pressing blocks 95 is fixed, the diameter of the inner wall of the second central rod 72 is smaller and smaller, so that the pressing blocks 95 are clamped in the second central rod 72 to prevent a user from falling, and the user is protected.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims (6)

1. A fractionating tower structure in an air separation plant comprises an upper tower (1) and a lower tower (2), and is characterized in that the lower end of the upper tower (1) is provided with the lower tower (2), a plurality of corridors (3) are sleeved on the outer surfaces of the upper tower (1) and the lower tower (2), a protective net is arranged on each corridor (3), the left end of each corridor (3) is provided with a stair climbing device (4), and the right end of each corridor (3) is provided with a lower stair climbing device (7);
the stair climbing device (4) comprises a first central rod (42) and a first side rod (41), the first side rod (41) is symmetrically arranged on the left side and the right side of the first central rod (42), a first connecting rod (45) is transversely installed between the first central rod (42) and the first side rod (41), an anti-skidding sleeve (46) is sleeved on the outer surface of the first connecting rod (45), a first sliding groove (43) is vertically formed in the rear end of the first central rod (42), a plurality of first matching clamping blocks (44) are symmetrically installed on the left side and the right side of the inner wall of the first central rod (42), a first hollow block (6) is arranged in the first central rod (42), a first connecting block (5) is installed at the front end of the first hollow block (6), a first fixing rod (51) is vertically installed in the first connecting block (5), the first fixing rod (51) is fixedly connected with the inner wall of the first central rod (42), a first sliding block (67, the rear end of the first sliding block (67) is provided with a first protection rope (68), a first threaded rod (61) is vertically installed in the first hollow block (6), the outer surface of the first threaded rod (61) is vertically and symmetrically sleeved with a first threaded sleeve (62), moving plates (65) are symmetrically arranged at the left end and the right end of the first hollow block (6), one end, close to the first hollow block (6), of each moving plate (65) is provided with a first extending block (64), the first extending block (64) penetrates through the two ends of the first hollow block (6), matching rods (63) are symmetrically installed at the left end and the right end of the first threaded sleeve (62), the matching rods (63) are rotatably connected with the first extending block (64), one end, far away from the first hollow block (6), of each moving plate (65) is provided with a plurality of matching clamping blocks (66), the matching clamping blocks (66) are rotatably connected with the moving plates (65), and the matching clamping blocks;
the downstairs device (7) comprises a second central rod (72) and a second side rod (71), the second side rod (71) is symmetrically arranged on the left side and the right side of the second central rod (72), a second connecting rod (74) is transversely installed between the second central rod (72) and the second side rod (71), an anti-skidding sleeve (75) is sleeved on the outer surface of the second connecting rod (74), a second sliding groove (73) is vertically formed in the rear end of the second central rod (72), the inner wall of the second central rod (72) inclines towards the middle, a second hollow block (9) is arranged in the second central rod (72), a second connecting block (8) is installed at the front end of the second hollow block (9), a second fixing rod (81) is vertically installed in the second connecting block (8), the second fixing rod (81) is fixedly connected with the inner wall of the second central rod (72), a second sliding block (96) is installed at the rear end of the second hollow block (9), the second sliding block (96) is, vertical installation threaded rod two (91) in two (9) hollow blocks, threaded sleeve two (92) is established to the symmetry cover from top to bottom on two (91) threaded rod surfaces, both ends symmetry sets up compact heap (95) about two (9) hollow blocks, compact heap (95) are close to two (9) one end installations of hollow blocks and stretch out two (94), and stretch out two (94) of piece and pass two (9) both ends of hollow blocks, compact heap (95) with stretch out two (94) of piece and rotate and connect, both ends symmetry installation cooperation pole two (93) about two (92) threaded sleeve, and cooperation pole two (93) with stretch out two (94) of piece and rotate and connect.
2. The fractionation tower structure in an air separation plant according to claim 1, wherein a fixing plate (32) is installed at the lower end of the lower tower (2), a fixing cylinder (31) is installed at the upper end of the fixing plate (32), and the fixing cylinder (31) is fixedly connected with the lower tower (2).
3. The fractionation tower structure in an air separation plant according to claim 2, wherein a plurality of bolts (33) are installed on the outer surface of the fixing plate (32).
4. The fractionating tower structure for an air separation plant according to claim 1, wherein a guard bar is provided between the first side bars (41) and has an arc shape, and a guard bar is provided between the second side bars (71) and has an arc shape.
5. The fractionating column structure for an air separation plant according to claim 1, wherein the first threaded rod (61) has a lower end provided with a bearing seat, and the second threaded rod (91) has a lower end provided with a bearing seat.
6. The fractionating column structure for an air separation plant according to claim 1, wherein a turning block is installed on the upper end of the first threaded rod (61), and a turning block is installed on the upper end of the second threaded rod (91).
CN202021966681.4U 2020-09-10 2020-09-10 Fractionating tower structure in air separation equipment Active CN212962428U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202021966681.4U CN212962428U (en) 2020-09-10 2020-09-10 Fractionating tower structure in air separation equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202021966681.4U CN212962428U (en) 2020-09-10 2020-09-10 Fractionating tower structure in air separation equipment

Publications (1)

Publication Number Publication Date
CN212962428U true CN212962428U (en) 2021-04-13

Family

ID=75365871

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202021966681.4U Active CN212962428U (en) 2020-09-10 2020-09-10 Fractionating tower structure in air separation equipment

Country Status (1)

Country Link
CN (1) CN212962428U (en)

Similar Documents

Publication Publication Date Title
CN106088565B (en) Attachment type raise scaffold tiltedly climbs method and attachment type raise scaffold
CN212962428U (en) Fractionating tower structure in air separation equipment
CN112267661B (en) Climbing frame convenient to adjust for construction industry
CN212583181U (en) Inclined lever type movable cantilever platform
CN205908105U (en) Electric power facility rail guard
CN215760331U (en) Portable removes staircase for fitment
CN212450250U (en) Special lifting appliance for outdoor construction of transformer substation
CN210217747U (en) Vault construction auxiliary device for tunnel construction
CN213039037U (en) Rail guard for building engineering convenient to equipment
CN214059667U (en) Hoist bridge crane convenient to maintain
CN212773370U (en) Scaffold
CN216381182U (en) Rod climbing anti-skidding ladder stand in rainy days
CN217782775U (en) Scaffold for civil engineering construction
CN219158887U (en) Ladder is hung in electric power construction
CN214302831U (en) Climbing device for scaffold
CN210368660U (en) Scaffold step for special-shaped bridge pier column
CN215857211U (en) Bailey bridge builds with tubular steel landing stage railing
CN220267171U (en) Building scaffold with detachable structure
CN218027200U (en) Portable support bed stone construction protector
CN220267187U (en) Building curtain installs safety device
CN213710261U (en) Scaffold with safety protection structure for building construction
CN219477456U (en) Protective device and 10KV line maintenance equipment
CN220150833U (en) Anti-falling hanging basket for constructional engineering
CN216379165U (en) Assembled adjustable support base stone construction protector
CN210659183U (en) A overhaul platform for guaranteeing maintainer safety

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant