KR102653912B1 - Clamp for working and saving in closed space - Google Patents

Abstract

The present invention relates to a clamp for confined space work and rescue, and more specifically, to a clamp for confined space work and rescue that can be installed on a tank so that an operator can tie a rope to inspect or maintain the inside of the tank.
The clamp for confined space work and structure according to the present invention includes a base frame provided with a fastening hole that can be bolted to the flange portion of a manhole provided in the tank to allow workers to enter the inside of the tank; A support is installed on the upper surface of the base frame and has a rope hanger on the upper portion for hanging a rope to support the worker's body or inspection tools, and the base frame extends long along the circumferential direction of the flange portion. And the fastening hole extends long along the longitudinal direction of the base frame.

Description

Clamp for working and saving in closed space}

The present invention relates to clamps for confined space work and rescue. More specifically, the present invention relates to a clamp for confined space work and rescue, and more specifically, to tie a rope to support the worker's body to facilitate the worker entering the inside of the tank to perform confined space work or rescue the worker in the tank. This relates to clamps for confined space work and rescue that can be installed on tanks.

In general, chemical plants that produce chemical products have many tanks or reactors installed to store or produce raw materials or products. These tanks are regularly inspected for corrosion and damage on the inner walls while the interior is emptied, or confined space work such as cleaning and repair is carried out, and workers in the confined space are rescued in emergency situations.

For this purpose, the worker must secure a rope to the outside of the tank to support the worker's body or rescue life, and lead it into the inside of the tank through a manhole provided in the tank. Then, the worker can use the rope to enter the inside of the tank. By entering the inspection tool, you can perform confined space work or rescue workers in the confined space.

Republic of Korea Patent No. 10-2101813 includes a storage tank inspection device that includes a fixed member installed on the ground, an inspection member disposed inside the tank, and a moving member that is supported by the fixed member and can raise and lower the inspection member. It has been disclosed.

However, since a large number of tanks are installed in a chemical plant, there is a problem in that installing the above storage tank inspection devices for each tank realistically requires excessive costs.

Therefore, recently, the demand for confined space work and structural clamps that workers can carry with a rope and are easy to transport and install to sites requiring confined space work is increasing.

Republic of Korea Patent No. 10-2101813: Storage tank inspection device.

The present invention is intended to improve the above-mentioned problems, and its purpose is to provide a clamp for confined space work and structure that is easy to transport and install on site where closed space work on tanks is required.

The clamp for confined space work and structure according to the present invention includes a base frame provided with a fastening hole that can be bolted to the flange portion of a manhole provided in the tank to allow workers to enter the inside of the tank; A support is installed on the upper surface of the base frame and has a rope hanger on the upper portion for hanging a rope to support the worker's body or inspection tools, and the base frame extends long along the circumferential direction of the flange portion. And the fastening hole extends long along the longitudinal direction of the base frame.

To form an insertion groove into which the flange part can be inserted between a first extension part extending downward to surround the edge of the flange part from one side of the base frame facing the edge of the flange part and the base frame. It further includes a flange hanger including a locking portion extending parallel to the base frame from the first extension portion.

A second extension part extends from the other side of the base frame facing the inside of the flange part to be inserted into the inside of the manhole, and while the base frame is fastened to the flange part, it is screwed together with the second extension part and rotates. As a result, the manhole support is further provided including a pressing member that moves toward the inner peripheral surface of the manhole and presses the inner peripheral surface of the manhole.

The base frame is arranged to be spaced apart from each other along the circumferential direction of the flange portion, connects a plurality of unit links in which the fastening hole is formed, and the neighboring unit links to each other, and moves along the fastening hole or changes the angle of the unit links. A plate-shaped connection link is provided with variably rotatable connection units, wherein the fastening hole is formed to penetrate with a large width from the upper surface of the unit link, and the connection units extend long, and auxiliary through holes are formed on both sides in the longitudinal direction. and a hollow portion through which a bolt for fastening the flange portion is inserted, and is formed in a cylindrical shape with a larger outer diameter at the bottom, penetrating the unit link and the connection link through the fastening hole and the auxiliary through hole and the unit. It is provided with a connection pin having a thread formed on the upper outer peripheral surface of the link and the connection link that protrudes upward, and a fastening ring that is screwed to the upper part of the connection pin and fastens the unit link and the connection link to each other.

The support extends upward from the upper surface of the base frame and is formed of a round bar-shaped support portion having a hollow portion and a cylindrical shape extending upward and downward. The lower part is inserted into the inside of the support portion and is rotatably installed, and the rope hanger is installed at the upper portion. It is provided with a rotating part provided.

The rope hanger is installed to protrude from the outer peripheral surface of the support toward the inside of the manhole, and includes a ring portion formed in a ring shape with a hanging space with an open top so that the rope can be hung, and the ring to be able to open and close the hanging space. It is hinged to the part and includes a blocking portion that opens the locking space when pressed in a direction entering the locking space, and an elastic member that elastically biases the blocking portion to rotate in a direction to close the locking space.

A pair of roller supports extending in parallel from the lower part of the second extension toward the inside of the manhole, and rotatably installed on the roller supports, a guide groove is provided on the outer circumferential surface to guide the rope introduced into the manhole. A rope guide including formed rollers is further provided.

As described above, the clamp for confined space work and structure according to the present invention has a simple structure, so it is easy to transport to the site where closed space work is required, and has the advantage of being easy to install on site through a configuration in which the base frame is coupled to the flange of the manhole. has

1 is a perspective view showing a closed space work and structural clamp installed in a tank according to the first embodiment of the present invention;
Figure 2 is an exploded perspective view of the confined space work and structural clamp of Figure 1;
Figure 3 is a perspective view of a clamp for confined space work and structure according to a second embodiment of the present invention;
Figure 4 is a side cross-sectional view showing the closed space work and structural clamp of Figure 3 installed in a manhole;
Figure 5 is a perspective view of a clamp for confined space work and structure according to a third embodiment of the present invention;
Figure 6 is a side cross-sectional view showing the closed space work and structural clamp of Figure 5 installed in a manhole;
Figure 7 is an exploded perspective view of a clamp for confined space work and structure according to a fourth embodiment of the present invention;
Figure 8 is a plan view showing the state in which the confined space work and structural clamp is installed in the manhole;
Figure 9 is a plan view showing a state in which the confined space work and structural clamp of Figure 8 is installed in a manhole of different standards;
Figure 10 is a cut-away perspective view of a clamp for confined space work and structure according to the fifth embodiment of the present invention;
Figure 11 is a side view of the rope hanger of the clamp for confined space work and rescue according to the sixth embodiment of the present invention;
Figure 12 is a perspective view showing the closed space work and structural clamp installed in the tank according to the seventh embodiment of the present invention;
Figure 13 is an exploded perspective view of the confined space work and structural clamp of Figure 12.

Hereinafter, the clamp for confined space work and structure according to the present invention will be described in detail with reference to the claimed drawings.

First, with reference to FIGS. 1 and 2, the tank 10 and manhole 12 in which the clamp 20 for confined space work and structure according to the first embodiment of the present invention is installed will be described.

The tank 10 includes a main body 11 having a storage space in which liquid substances such as raw materials, intermediate products, and by-products can be stored, and a manhole 12 installed in the main body 11.

The manhole 12 is a structure installed on the top or side of the main body 11 to allow access to the storage space of the main body 11. In this embodiment, the manhole 12 is installed at the top of the main body 11. The manhole 12 extends up and down and has a cylindrical neck 13 on one side connected to the main body 11 to communicate with the storage space and the outside, and a cover installed on the other side of the neck 13 to close the storage space. It includes a flange portion 14 to which (not shown) can be coupled.

The neck portion 13 is formed in a cylindrical shape. The neck portion 13 is installed to extend upward from the outer peripheral surface of the main body 11. The main body 11 and the neck 13 are joined by welding, and a weld line is formed at the connection portion of the main body 11 and the neck 13 by welding.

The flange portion 14 is installed at the top of the neck portion 13. The flange portion 14 and the neck portion 13 are joined by welding, and a weld line is formed at the connection portion of the flange portion 14 and the neck portion 13 by welding. The flange portion 14 has an outer diameter larger than that of the neck portion 13 and is formed in a circular ring shape with the same inner diameter as the neck portion 13. The flange portion 14 is formed with a plurality of bolt coupling holes 15 so that it can be bolted to the cover.

A plurality of bolt coupling holes 15 of the flange portion 14 are formed to be spaced apart at regular intervals along the circumferential direction of the flange portion 14.

Hereinafter, with reference to FIGS. 1 and 2, the clamp 20 for confined space work and structure according to the first embodiment of the present invention will be described in detail.

The clamp 20 for confined space work and structure according to the first embodiment of the present invention includes a base frame 21 that can be bolted to the flange portion 14 of the manhole 12, and an upper surface of the base frame 21. It is installed and is provided with a support stand (24) equipped with a rope hanger (26) on which a rope (16) can be hung to support the worker's body or inspection tools.

The base frame 21 is formed in an arc-shaped plate shape extending long along the circumferential direction of the flange portion 14. The base frame 21 is provided with a fastening hole 22 so that it can be bolted to the flange portion 14.

Unlike the first embodiment of the present invention, the base frame 21 may be formed of a pair of plate-shaped members that are hinged to each other and can be folded at an angle corresponding to the position of the fastening hole 22 of the flange portion 14.

The fastening holes 22 are formed on both sides of the support 24 installed at the center along the longitudinal direction of the base frame 21.

The fastening hole 22 is formed in the shape of a long hole extending along the longitudinal direction of the base frame 21.

The support 24 is formed in a cylindrical shape extending vertically. The support 24 is installed at the center of the length of the base frame 21 on the upper surface of the base frame 21.

The rope hanger 26 is formed on the upper part of the support 24. The rope hanger 26 protrudes from the upper outer peripheral surface of the support 24 toward the inside of the manhole 12 and is formed in a plate shape with a plane parallel to the longitudinal direction of the support 24.

The rope hanger 26 is formed with a binding hole 27 through which the worker can bind the rope 16.

The binding hole 27 is formed through the horizontal direction from the side of the rope hanger 26.

Alternatively, the rope hanger may be installed so that the rope 16 is wound, and a winch installed on the upper part of the support 24 may be used to adjust the length at which the rope 16 is introduced into the main body 11.

The clamp 20 for closed space work and structure according to the first embodiment of the present invention is made by the operator placing the base frame 21 in contact with the upper surface of the flange portion 14 and attaching the fastening bolt 17 to the base frame 21. It penetrates the fastening hole 22 of and the bolt coupling hole 15 of the flange portion 14. Thereafter, when the base frame 21 and the flange portion 14 are fastened to each other by screwing the fastening nut 18 to the end of the fastening bolt 17 protruding from the base frame 21 and the flange portion 14, the present invention The closed space work and installation of the structural clamp 20 according to the first embodiment are completed.

At this time, the clamp 20 for closed space work and structure according to the first embodiment of the present invention has a fastening hole 22 extending along the longitudinal direction of the base frame 21 to connect the fastening bolt 17 and the base frame 21. It is possible to combine in response to changes in the spacing of the fastening holes (15).

In this state, the worker ties one side of the rope 16 to support the body to the rope hanger 26, inserts the other side into the interior of the main body 11, supports the body on the rope 16, and then attaches the main body ( It is possible to enter or exit the inside of the tank (10), and enables closed space work such as inspection and maintenance inside the tank (10). In addition, in an emergency situation, it has the effect of allowing an outside worker to pull the rope (17) to rescue workers in a confined space.

The clamp 20 for confined space work and structure according to the first embodiment of the present invention as described above has a simple structure, making it easy for workers to transport to the site where closed space work is required, and the base frame 21 has a flange portion ( 14), it has the advantage of being easy to install on site through its configuration.

In addition, the clamp 20 for closed space work and structure according to the first embodiment of the present invention allows the coupling position of the fastening bolt 17 to be differently coupled depending on the change in the spacing of the fastening hole 15 formed in the flange portion 14. Therefore, the operator has the advantage of being able to install it on the flange portion 14 of various specifications.

4 to 5 below show a clamp 30 for confined space work and structure according to a second embodiment of the present invention. Since the clamp 30 for confined space work and structure according to the second embodiment of the present invention has the same configuration other than the flange hanger 31 as the first embodiment of the present invention, redundant description will be omitted.

Referring to the drawing, the clamp 30 for confined space work and structure according to the second embodiment of the present invention further includes a flange hanger 31 formed on the base frame 21 to grip the flange portion 14 of the manhole. Equipped with

The flange hanger 31 includes a first extension part 32 extending downward from the base frame 21, and a locking part 33 extending parallel to the base frame 21 from the first extension part 32. do.

The first extension portion 32 extends downward from one side of the base frame 21 toward the edge of the flange portion 14. The first extension portion 32 extends to a length greater than the thickness of the flange portion 14 and extends to surround the outer peripheral surface of the edge side of the flange portion 14.

The locking portion 33 extends parallel to the base frame in a direction from the lower end of the first extension portion 32 toward the outer peripheral surface of the neck portion 13. The locking portion 33 forms an insertion groove 34 between the base frame and the edge of the flange portion into which the end portion can be inserted.

The locking portion 33 extends to a length smaller than the width of the flange portion 14, so that even when the flange portion 14 is inserted into the insertion groove 34, the end of the locking portion 33 is in contact with the outer peripheral surface of the neck portion 13. is prevented.

A plurality of flange hangers 31 are formed to be spaced apart from each other along the longitudinal direction of the base frame 21.

The clamp 30 for closed space work and structure according to the second embodiment of the present invention having the above-described configuration is coupled to the flange portion 14 so that the flange portion 14 is inserted into the insertion groove 34, thereby completing the present invention. It enables temporary assembly for installing the confined space work and structural clamp 30 according to the second embodiment of the manhole.

The clamp 30 for confined space work and structure according to the second embodiment of the present invention allows the operator to temporarily assemble the clamp 30 for confined space work and structure according to the second embodiment of the present invention to the frame portion 14, thereby forming a base. This has the advantage of preventing the frame 21 and the flange portion 14 from being tilted or toppled by wind blowing at the work site or external shock when they are not fastened to each other.

In addition, the clamp 30 for closed space work and structure according to the second embodiment of the present invention is coupled so that the edge side of the flange portion 14 is surrounded by the first extension portion 32 and the engaging portion 33. When the rope 16 is pulled in the inner direction of the manhole 12, the lower surface of the flange portion 14 is caught by the catching portion 33.

Through the above action, the clamp 30 for closed space work and structure according to the second embodiment of the present invention is a fastening in which the load applied through the rope 16 fastens the base frame 21 and the flange portion 14 to each other. It has the advantage of preventing a worker from falling due to damage to the fastening bolt 17 by dispersing it into the bolt 17 and the locking portion 33.

6 to 7 show a clamp 40 for confined space work and structure according to a third embodiment of the present invention.

Referring to the drawings, since the clamp 40 for confined space work and structure according to the third embodiment of the present invention has the same configuration other than the manhole support 41 as the second embodiment of the present invention, redundant description will be omitted.

The clamp 40 for confined space work and structure according to the third embodiment of the present invention further includes a manhole support 41 installed on the base frame to pressurize and support the inner peripheral surface of the manhole.

The manhole support 41 has a second extension 42 extending downward from the base frame 21, and is screwed to the second extension 42 so that it can advance and retreat in the direction toward the inner peripheral surface of the neck 13 as it rotates. It includes a pressure member 43 that is coupled.

The second extension portion 42 extends from the other side of the base frame 21 facing the inside of the flange portion 14 in a direction toward the inside of the flange portion 14 and then extends downward into the inside of the manhole 12. It is bent and extended. The second extension portion 42 is formed in a plate shape.

A screw coupling hole 47 is formed in the lower part of the second extension 42 along a direction toward the inner peripheral surface of the neck 13. A thread line is formed on the inner peripheral surface of the screw coupling hole 47 so that the screw portion 44, which will be described later, can be screwed.

The pressing member 43 includes a threaded portion 44 that is screwed into the screw coupling hole, a support pad 45 installed on one side toward the neck of the threaded portion 44, and a support pad 45 installed on the other side of the threaded portion 44 so that the operator can press the screw portion (44). It is provided with a gripping portion 46 that can be gripped to rotate 44).

The threaded portion 44 has an outer diameter corresponding to the diameter of the screwed hole 47 and is formed in a cylindrical shape extending parallel to the screwed hole 47. The threaded portion 44 has a thread formed on its outer peripheral surface and is screwed together with the second extension portion 42 through the screwed hole 47.

The support pad 45 is installed on one side of the threaded portion 44. The support pad 45 is formed in a plate shape. The support pad 45 is configured to expand the area in close contact with the inner peripheral surface of the neck portion 13 and is formed in a plate shape with an outer diameter larger than that of the threaded portion 44. It is preferable that a rubber member (not shown) whose shape can be changed by an external force is installed on one surface of the support pad 45 facing the neck 43 so that it can be deformed into close contact with the inner peripheral surface of the neck 13.

The handle 46 is fixedly installed on the other side of the screw part 44 so that it rotates integrally with the screw part 44. The handle 46 is formed in a cylindrical shape with an outer diameter larger than that of the threaded portion 44. It is desirable for the handle to have an anti-slip groove formed on the outer peripheral surface to prevent the user's hand from slipping.

In the handle according to the third embodiment of the present invention, when the flange portion is inserted into the insertion groove and the base frame is coupled to the flange portion and the operator holds the grip portion and rotates the screw portion, the screw portion advances toward the inner peripheral surface of the neck portion (13). do.

As the screw portion 44 advances, the support pad 45 moves toward the inner peripheral surface of the neck portion 13, comes into close contact with the inner peripheral surface of the neck portion 13, and presses and supports the inner peripheral surface of the neck portion 13.

In the clamp 40 for closed space work and structure according to the third embodiment of the present invention as described above, the base frame 21 is fastened to the flange portion 14, and the rope 16 is connected to the tank 10 by the worker's load. When pulled toward the inside, a rotational force is applied in the direction in which the support device 24 falls toward the inside of the tank 10.

In this state, in the clamp 40 for closed space work and structure according to the third embodiment of the present invention, the pressing member 43 presses and supports the inner circumferential surface of the neck portion 14 to provide a supporting force in the opposite direction to the rotational force caused by the worker's load. It works.

The clamp 40 for closed space work and structure according to the third embodiment of the present invention supports the support 24 so that it does not fall toward the inside of the tank 10, thereby supporting the flange portion 14 and the base frame 21. It has the advantage of preventing damage to the fastening bolt (17) and stably supporting the rope (16) and the worker.

7 to 9 show a clamp 50 for confined space work and structure according to a fourth embodiment of the present invention.

Referring to the drawings, since the clamp 50 for confined space work and structure according to the fourth embodiment of the present invention has the same configuration other than the base frame 51 as the first embodiment of the present invention, redundant description will be omitted.

Referring to the drawing, the base frame 51 of the clamp 50 for confined space work and structure according to the fourth embodiment of the present invention includes a plurality of unit links 52 and 54 arranged to be spaced apart from each other, and the unit links are connected to each other. A connection unit 60 is provided for connection.

The unit links 52 and 54 are spaced apart from the main unit link 52 on which the support 24 is installed and on the side of the main unit link 52 along the circumferential direction of the flange portion 14. It is divided into a plurality of auxiliary unit links 54 arranged.

In addition, the fastening holes formed in each of the unit links 52 and 54 include a first unit fastening hole 53 formed in the main unit link 52 and a second unit fastening hole formed in the auxiliary unit link 54 ( 55).

The main unit link 52 is formed in an arc-shaped plate shape extending along the circumferential direction of the flange portion 14. The main unit link 52 is formed to be round on both sides in the longitudinal direction. The upper part of the first unit fastening hole 53 is formed to have a width corresponding to the outer diameter of the connecting pin 63. The first unit fastening hole 53 is formed so that the width of the lower part adjacent to the flange portion 14 gradually increases from the upper surface of the main unit link 52. The main unit link 52 supports downwardly a connecting pin 63, which will be described later, between the upper and lower surfaces of the main unit link 52 due to the difference between the upper and lower widths of the first unit fastening hole 53. A support stage 53a that can be used is provided.

The auxiliary unit link 54 is formed in an arc-shaped plate shape extending along the circumferential direction of the flange portion 14. The auxiliary unit link 54 has both longitudinal sides rounded. A second unit fastening hole 55 penetrating upward and downward is formed in the auxiliary unit link 54. The upper part of the second unit fastening hole 55 is formed to have a width corresponding to the outer diameter of the connecting pin 63. The second unit fastening hole 55 is formed so that the width of the lower part adjacent to the flange portion 14 is increased from the upper surface of the auxiliary unit link 54. The auxiliary unit link 54 supports downwardly the guide portion 65, which will be described later, between the upper and lower surfaces of the auxiliary unit link 54 due to the difference between the upper and lower widths of the second unit fastening hole 55. A support stage 53a that can be used is provided.

The connection units 60 are installed to interconnect neighboring unit links 52 and 54.

The connection unit 60 includes a connection link 61 that extends long and has auxiliary through holes 62 on both sides, and a connection pin 63 coupled to penetrate the connection link 61 and the unit links 52 and 54. and a fastening ring 68 that is coupled to the connecting pin 63 to fasten the connecting link 61 and the unit links 52 and 54 to each other.

The connecting link 61 extends long, and auxiliary through holes 62 are formed on both sides in the longitudinal direction. The auxiliary through hole 62 is formed to be larger than the outer diameter of the connecting pin 63 and smaller than the outer diameter of the fastening ring 68.

The connection pin 63 is formed in a cylindrical shape extending up and down. The connection pin 63 has a hollow portion formed so that the fastening bolt 17 for fastening to the flange portion 14 can penetrate therein. The connection pin 63 is formed with a circular guide portion 65 that protrudes from the outer peripheral surface to have a larger outer diameter. A threaded portion 66 having threads formed on the outer peripheral surface is provided on the upper part of each connecting link 61.

A plurality of connection pins 63 are provided. The connecting pin 63 is coupled to the auxiliary through holes 62 on both sides of the connecting link 61, respectively.

The connecting pin 63 coupled to one side of the connecting link 61 penetrates the main unit link 52 and the connecting link 61 through the first unit fastening hole 53 and the auxiliary through hole 62 to form a threaded portion ( 66) are combined to protrude upward. The connection pin 63 is movably coupled along the longitudinal direction of the first unit fastening hole 53. The guide portion 65 of the connecting pin 63 is coupled so that its upper surface abuts the support end 53a of the main unit link 52.

The connection link 61 and the main unit link 52 are rotated at a variable angle using the connection pin 63 as a rotation axis.

The connecting pin 63 coupled to the other side of the connecting link 61 penetrates the auxiliary unit link 54 and the connecting link 61 through the second unit fastening hole 55 and the auxiliary through hole 62 to form a threaded portion ( 66) are combined to protrude upward. The connection pin 63 is movably coupled along the longitudinal direction of the second unit fastening hole 55. At this time, the upper surface of the guide portion 65 of the connecting pin 63 is coupled to the support end 53a of the auxiliary unit link 54.

The connection link 61 and the auxiliary unit link 54 are rotated at a variable angle using the connection pin 63 as a rotation axis.

The fastening ring 68 is formed in a circular ring shape with an inner diameter corresponding to the outer diameter of the threaded portion 66 so that it can be screwed together with the threaded portion 66. The fastening ring 68 is screwed to the threaded portion 66 of each connecting link 61 to fasten each unit link 52 and 54 and the connecting links 61.

The clamp 50 for closed space work and structure according to the fourth embodiment of the present invention is configured to fit the base frame 51 with the main and auxiliary unit links 52 and 54 disposed in contact with the upper surface of the flange portion 14. ) and the fastening bolt 17 for mutually fastening the flange portion 14 to the bolt coupling hole 16 of the flange portion 14 and the second unit fastening hole 53 of the auxiliary unit link 54 or the connecting pin ( It is coupled through the hollow part 64 of 63). Thereafter, the base frame 51 is fastened to the flange portion 14 by coupling the fastening nut 18 to the fastening bolt 17.

In addition, the worker uses the first clamp to install the clamp 50 for confined space work and structure according to the fourth embodiment of the present invention to the flange portion 19 of the manhole 16 of a larger size as shown in FIG. 9. , the angle of the two-unit links (52, 54) can be varied so that they are arranged along the changed radius of curvature of the flange portion (19). In addition, the worker connects the fastening bolts 17 by moving the connecting pin 63 along the longitudinal direction of the first or second unit fastening holes 53 and 55 to correspond to the changed spacing between the bolt fastening holes 15. The position of the connection pin 63 or the gap between the main and auxiliary unit links 52 and 54 can be adjusted.

In this way, the clamp 50 for confined space work and structure according to the fourth embodiment of the present invention allows the spacing and angle between the main and auxiliary unit links 52 and 54 to be adjusted in the field to correspond to various specifications of the manhole. It has the advantage of allowing workers to quickly respond to various work requirements.

In addition, the clamp 50 for closed space work and structure according to the fourth embodiment of the present invention includes a plurality of unit links 52 and 54 in which the base frame 51 is fastened to the flange portion 14 to form a flange portion ( 14) is configured to expand, so that the load transmitted through the rope 16 is distributed to a plurality of fastening bolts 17, preventing the fastening bolts 17 from being damaged and making the rope 16 more stable. It has the advantage of being supported.

Figure 10 shows a clamp 70 for confined space work and structure according to the fifth embodiment of the present invention.

Referring to the drawings, since the clamp 70 for confined space work and structure according to the fifth embodiment of the present invention has the same configuration other than the support 71 as the first embodiment of the present invention, redundant description will be omitted.

The support 71 of the clamp 70 for closed space work and structure according to the fifth embodiment of the present invention includes a support part 72 in the shape of a round bar extending upward from the upper surface of the base frame 21 and having a hollow part, and It is formed in the shape of an extended cylinder, the lower part of which is inserted into the inside of the support part 72 and rotatably installed, and a rotating part 74 with a rope hanger 26 is provided on the upper part.

A bearing 75 is installed in the hollow portion 73 of the support portion 72 to rotatably support the rotating portion 74. The bearing 75 is installed to be supported upward by a support projection 77 protruding from the inner peripheral surface of the support portion 72.

It is preferable that a plurality of bearings 75 are installed along the vertical direction to stably support the rotating part 74.

A core 76 is installed below the bearings 75 to support the rotating part 74 upward within the hollow part 73.

The core 76 is formed in the shape of a solid shaft with an outer diameter larger than the rotating part 74 so as to support the rotating part 74 upward.

The rotating part 74 is formed in a cylindrical shape extending up and down. The rotating part 74 is installed so that its lower part is inserted into the hollow part 73 of the supporting part 72 and its lower end is supported upward by the core 76. The rotating part 74 is coupled to the bearings 75 and is rotatably installed.

The clamp 70 for confined space work and rescue according to the fifth embodiment of the present invention as described above changes the direction of the rope hanger 26 to which the rope is tied as the worker moves within the tank, allowing the worker to freely move within the tank. It has the advantage of being able to move.

Figure 11 shows a clamp 80 for confined space work and structure according to the fifth embodiment of the present invention. Referring to the drawings, the clamp 80 for confined space work and rescue according to the fifth embodiment of the present invention is the same as the first embodiment of the present invention other than the rope hanger 81, so duplicate description will be omitted.

The rope hanger 81 includes a ring portion 82 formed in a ring shape with a hanging space 83 with an open top so that the rope 16 can be hung, and a ring portion 82 that allows the hanging space 83 to be opened and closed. It is hinged to the blocking portion 84 that opens the locking space 82 when pressed in the direction of entering the locking space 82, and is elastic so that the blocking portion 84 is rotated in the direction of closing the locking space 83. It is provided with an elastic member (85) for biasing.

The ring portion 82 is installed to protrude from the outer peripheral surface of the support 24 toward the inside of the manhole 12. The ring portion 82 is bent and extended to form a hanging space 82 with an open top.

One side of the blocking portion 84 is hinged to the hinge shaft 86 provided on the rope hanger 81. The other side of the blocking portion 84 extends across the open portion of the locking space 83 so as to contact the bottom surface of the end of the ring portion 82.

The elastic member 85 has one side fixed to the hinge shaft 86 and the other side extends to support the lower surface of the blocking portion 84. The elastic member 85 is a reel spring that exerts a restoring force in the direction of rotating the other side of the blocking portion 84 upward.

In the clamp 80 for closed space work and rescue according to the fifth embodiment of the present invention, when the worker holds the rope 16 and presses the blocking part 84, the blocking part 84 is pressed and rotated, and the hanging space 82 ) is opened.

Afterwards, when the rope 16 is received in the hanging space 82 via the blocking part 84, the blocking part 84 rotates to come into contact with the other lower surface of the ring part 82 by the restoring force of the elastic member 85. And the open part of the hanging space 82 is blocked to prevent the rope 16 from escaping.

The clamp 80 for confined space work and rescue according to the fifth embodiment of the present invention allows the worker to make a knot in the rope 16 or unbind it in order to bind the rope 16 to the rope hanger 81. This has the advantage of allowing workers to shorten the preparation process for confined space work by allowing the process of untying the knot made in the rope 16 to be omitted.

12 to 13 show a clamp 90 for confined space work and structure according to a sixth embodiment of the present invention.

Referring to the drawings, the main body 101 of the tank 100 on which the clamp 90 for closed space work and structure according to the sixth embodiment of the present invention is installed has an internal space and has the shape of a pressure vessel extending horizontally. .

Referring to the drawings, the clamp 90 for closed space work and structure according to the sixth embodiment of the present invention is the same as the second embodiment of the present invention other than the manhole support 41 and the rope guide 91, so duplicate description is omitted. .

The clamp 90 for confined space work and structure according to the sixth embodiment of the present invention is installed on the base frame 21 to pressurize and support the inner peripheral surface of the manhole, and the manhole support 41 is installed on the manhole support 41 to support the manhole. (12) is further provided with a rope guide (81) through which the rope introduced into the interior can be guided.

The manhole support 41 has the same configuration as the manhole support 41 of the third embodiment of the present invention.

The rope guide 81 includes a pair of roller supports 92 extending in parallel from the lower portion of the second extension 42, and a roller 93 rotatably installed on the roller supports 92.

The roller support portion 92 extends parallel to the inside of the manhole 12 from the lower portion of the second extension portion 42. The roller support portion 92 is formed in a plate shape. A horizontally extending rotation shaft 95 is provided between the roller supports 92 so that the roller 93 can be rotatably supported.

The roller 93 is formed in a cylindrical shape. The roller 93 is rotatably supported on the rotation shaft 95. A guide groove 94 through which the rope 16 can be guided is formed on the outer peripheral surface of the roller 93 by being retracted along the circumferential direction.

The clamp 90 for closed space work and structure according to the sixth embodiment of the present invention is arranged so that the roller 93 is introduced into the inside of the manhole 12 with the base frame 21 fastened to the flange portion 14. do. In this state, the worker binds one side of the rope 16 to the rope hanger 26 and inserts the other side into the interior of the main body 101, and the outer peripheral surface of the rope 16 is in the guide groove 94 of the roller 93. It can be installed to accommodate.

In the clamp 90 for confined space work and structure according to the sixth embodiment of the present invention as described above, the rope 16 is guided by the roller 93, so that the worker moves within the tank for confined space work. This has the advantage of preventing the outer peripheral surface of the rope 16 from being broken or cut by being scratched by a weld line inside the tank 100 or the edge of the flange portion 14 and the main body 101.

The present invention described above has been described with reference to an example shown in the drawings, but this is merely illustrative, and those skilled in the art will understand that various modifications and other equivalent embodiments are possible therefrom. will be. Therefore, the true scope of technical protection of the present invention should be determined by the technical spirit of the appended claims.

10, 100: Tank 12, 16: Manhole
20, 30, 40, 50, 70, 80, 90: Clamps for confined space work and rescue
21, 51: base frame 24, 71: support

Claims (7)

A base frame provided with a fastening hole that can be bolted to the flange portion of a manhole provided in the tank to allow workers to enter the inside of the tank,
A support is installed on the upper surface of the base frame and has a rope hanger on the upper part for hanging a rope to support the worker's body or inspection tools,
The base frame extends long along the circumferential direction of the flange portion, and the fastening hole extends long along the longitudinal direction of the base frame,
A second extension part extends from the other side of the base frame facing the inside of the flange part to be inserted into the inside of the manhole, and while the base frame is fastened to the flange part, it is screwed together with the second extension part and rotates. As a result, a manhole support including a pressing member that moves toward the inner peripheral surface of the manhole and presses the inner peripheral surface of the manhole is further provided,
A pair of roller supports extending in parallel from the lower part of the second extension toward the inside of the manhole, and a guide groove on the outer circumferential surface to be rotatably installed on the roller supports and to guide the rope introduced into the manhole. A clamp for confined space work and rescue, characterized in that it is further provided with a rope guide including formed rollers. According to clause 1,
To form an insertion groove into which the flange part can be inserted between a first extension part extending downward to surround the edge of the flange part from one side of the base frame facing the edge of the flange part and the base frame. A clamp for confined space work and structure, characterized in that it further includes a flange hanger including a locking portion extending parallel to the base frame from the first extension portion. delete The method of claim 1, wherein the base frame is
A plurality of unit links arranged to be spaced apart from each other along the circumferential direction of the flange portion and having the fastening hole are connected to each other, and the neighboring unit links are moved along the fastening hole or rotated so that the angle of the unit link is variable. Possible connection units are provided,
The fastening hole is formed to increase in width through the upper surface of the unit link,
The connection units include a plate-shaped connection link that extends long and has auxiliary through holes formed on both sides in the longitudinal direction,
It has a hollow portion through which a bolt for fastening the flange portion is inserted and is formed in a cylindrical shape with a larger outer diameter at the bottom, penetrating the unit link and the connection link through the fastening hole and the auxiliary through hole, and passing through the unit link and the connection link. A connecting pin with a thread formed on the outer peripheral surface of the upper part that protrudes upward from the connecting link,
A clamp for confined space work and structure, characterized in that it has a fastening ring screwed to the upper part of the connecting pin to fasten the unit link and the connecting link to each other. The method of claim 1, wherein the support
a round bar-shaped support portion extending upward from the upper surface of the base frame and having a hollow portion;
A clamp for confined space work and rescue, characterized in that it is formed in a cylindrical shape extending up and down, the lower part is retracted into the inside of the support part, and is rotatably installed, and has a rotating part provided with the rope hanger at the upper part. The method of claim 1, wherein the rope hanger is
A ring portion installed to protrude from the outer peripheral surface of the support toward the inside of the manhole and formed in a ring shape with a hanging space with an open upper part for the rope to be caught;
A blocking portion that is hinged to the ring portion to enable opening and closing of the locking space and opens the locking space when pressed in a direction toward entering the locking space;
A clamp for confined space work and structure, characterized in that it has an elastic member that elastically biases the blocking portion to rotate in a direction that closes the locking space. delete

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