Remote Control Device

Abstract

To provide a remote control device which can reduce the time needed for installation work of a penetrating shaft.SOLUTION: A remote control device 1 according to one embodiment of the invention is a device for operating an apparatus disposed at the inner side of a structure W, defining a space, from the outside of the structure W. The remote control device 1 includes: a sleeve 2 disposed at a through hole H formed at the structure W; a penetrating shaft 3 which may be inserted into the sleeve 2; a support member 4 disposed at the first end part 3a side of the penetrating shaft 3; a bearing 5 disposed at the second end part 3b side of the penetrating shaft 3; and a collar 6 which is disposed at an inner periphery of the sleeve 2 and fitted in the bearing 5.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a remote control device, and more particularly to a remote control device having a shaft that penetrates a structure (such as a wall or a floor) that divides a space. [Background technology]

[0002] For example, in a nuclear power plant, there are cases where workers cannot enter areas where manual operation handles are installed during operation or in the event of an accident, so it is necessary to be able to remotely operate such handles from areas where workers can enter.

[0003] For example, Patent Document 1 discloses a valve opening and closing device for remotely operating a valve opening and closing device installed inside a reactor building of a nuclear power plant. The valve opening and closing device described in Patent Document 1 includes an actuator for opening and closing a valve body installed inside the reactor building, two flexible shafts, a motor for inputting torque to the actuator, a through shaft that penetrates the wall of the reactor building, and the like.

[0004] A through hole is formed in the wall of the reactor building, an outer pipe is disposed through the through hole, and a through shaft is disposed through the outer pipe. In addition, both ends of the through shaft are supported by bearings of an inner bearing part and an outer bearing part, which are fixed to the wall of the reactor building by bolts or the like. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2014-118995 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, since the through shaft cannot be inserted into the through hole when some structures (bearings, etc. in Patent Document 1) are attached to both ends of the through shaft, the through shaft must be inserted with one structure removed. In addition, the remote control device requires periodic maintenance, and the through shaft must be taken out during maintenance and returned to its original position after maintenance.

[0007] Therefore, the invention described in Patent Document 1 had the problem that it was difficult to maintain the parallelism of the through-hole shaft when removing and inserting the through-hole shaft, and because the through-hole shaft is heavy, the work took a long time.

[0008] The present invention has been made in view of the above problems, and an object of the present invention is to provide a remote control device capable of shortening the time required for the removal and insertion of a through shaft. [Means for solving the problem]

[0009] According to the present invention, there is provided a remote control device for operating, from outside a structure that divides a space, a device disposed inside the structure, the remote control device comprising: a sleeve disposed in a through hole formed in the structure; a through shaft that can be inserted into the sleeve; a support member disposed on a first end side of the through shaft; a bearing disposed on a second end side of the through shaft; and a collar disposed on an inner periphery of the sleeve and fitted with the bearing. the through shaft includes a spline shaft portion formed at the first end portion and a spline shaft coupling fitted to the spline shaft portion, and the support member is disposed at the spline shaft coupling. A remote control device is provided.

[0010] The support member may be an annular member disposed on an outer periphery of the through shaft.

[0012] The color is The first end portion is The nozzle may include a tapered portion that is reduced in diameter toward the second end.

[0013] The sleeve may comprise a relatively narrow first sleeve and a relatively wide second sleeve, the collar being disposed between the first sleeve and the second sleeve.

[0014] The through shaft may have a strength designed to match the allowable torque at the weakest point of the remote control device.

[0015] The remote control device may include plates connected to opposite ends of the sleeve and fixed to the structure.

[0016] The remote control device may include a cover member for sealing the outer end of the sleeve in a water-tight manner. Effect of the Invention

[0017] According to the remote control device of the present invention described above, since the first end of the through shaft is supported by the support member and the second end of the through shaft is supported by the bearing and the collar, the parallelism of the through shaft can be maintained while supporting the weight of the through shaft, and the through shaft can be easily moved within the sleeve. Therefore, according to the present invention, the time required for the removal and insertion of the through shaft can be shortened. [Brief description of the drawings]

[0018] [Figure 1] 1 is an overall configuration diagram showing a remote control device according to an embodiment of the present invention; [Diagram 2] 10A to 10D are explanatory diagrams showing the procedure for installing the remote control device from the outside, where (a) shows the sleeve insertion process, (b) shows the cover member installation process, (c) shows the gear box installation process, and (d) shows the mortar injection process. [Diagram 3] 10A to 10D are explanatory diagrams showing the procedure for installing the remote control device from the inside, where (a) shows the sleeve insertion process, (b) shows the gear box installation process, (c) shows the cover member installation process, and (d) shows the mortar injection process. [Figure 4]5A to 5C are explanatory views showing the procedure for taking out the through shaft to the outside, in which (a) shows a lid member removing step, (b) shows a stopper removing step, and (c) shows a through shaft removing step. [Diagram 5] 10A to 10C are explanatory diagrams showing the procedure for removing the through-shaft inward, where (a) shows the process of removing the flexible shaft from the gearbox, (b) shows the process of removing the gearbox, and (c) shows the process of removing the through-shaft. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] An embodiment of the present invention will be described below with reference to Fig. 1 to Fig. 5. Fig. 1 is an overall configuration diagram showing a remote control device according to an embodiment of the present invention. For ease of explanation, Fig. 1 shows only the configuration of a penetration part of a structure, and omits the illustration of a device to be remotely controlled, a handle for remote control, etc.

[0020] A remote control device 1 according to one embodiment of the present invention is a device for operating equipment (not shown) arranged inside a structure W that divides a space from outside the structure W, as shown in FIG. 1, and includes a sleeve 2 arranged in a through hole H formed in the structure W, a through shaft 3 that can be inserted into the sleeve 2, a support member 4 arranged on a first end 3a side of the through shaft 3, a bearing 5 arranged on a second end 3b side of the through shaft 3, and a collar 6 arranged on the inner circumference of the sleeve 2 and engaging with the bearing 5.

[0021] The structure W is, for example, a bulkhead of a reactor building. In Fig. 1, the left side of the structure W indicates the indoor side (inside), and the right side indicates the outdoor side (outside). In this embodiment, for convenience of explanation, the term "first end side" refers to the indoor side (inside), and the term "second end side" refers to the outdoor side (outside).

[0022] The structural body W is not limited to the bulkhead of the reactor building. The structural body W is made of concrete, for example, and a through hole H is formed by boring a horizontal hole therein.

[0023] The sleeve 2 is a metallic cylinder configured so that the through shaft 3 can be inserted therein. The sleeve 2 is inserted into the through hole H, and both ends are supported by a plate 7 fixed to the structure W. The plate 7 is a metal plate with an opening in approximately the center, and is arranged so as to close the through hole H by, for example, a stud bolt or the like arranged on the wall surface of the structure W.

[0024] The sleeve 2 is inserted into the opening of the plate 7, and both ends of the sleeve 2 are connected to the plate 7 without any gaps by a connecting means such as welding. The space formed by the sleeve 2 and the through hole H is filled with building materials such as mortar.

[0025] The sleeve 2 includes a relatively thin first sleeve 21 and a relatively thick second sleeve 22. The first sleeve 21 is disposed on the first end 3a side of the through shaft 3, and the second sleeve 22 is disposed on the second end 3b side of the through shaft 3. A collar 6 is disposed between the first sleeve 21 and the second sleeve 22. The first sleeve 21 is connected to the first end side of the collar 6 by a connecting means such as welding. The second sleeve 22 is connected to the second end side of the collar 6 by a connecting means such as welding.

[0026] The first sleeve 21 and the second sleeve 22 may have the same thickness. The first sleeve 21 and the second sleeve 22 may be formed of a single cylindrical body that is not divided by the collar 6. In this case, the collar 6 is disposed inside the sleeve 2.

[0027] A gear box 8 for transmitting torque to a remotely operated device is connected to the plate 7 arranged on the indoor side (inside). A joint part 81 connected to the through shaft 3 so as to be able to transmit torque, and a flexible shaft 82 connected to the remotely operated device so as to be able to transmit torque are connected to the gear box 8. Although not shown, a bevel gear is built into the gear box 8.

[0028] A cover member 9 that water-tightly seals the outer end of the sleeve 2 is disposed on the plate 7 disposed on the outdoor side (outside). The cover member 9 is configured to be removable. The cover member 9 is configured to be removed from the plate 7 during remote operation or maintenance, allowing access to the through shaft 3 from the outdoor side (outside). The cover member 9 may include a handle 91 that an operator holds and a seal member 92 that comes into close contact with the inner circumferential surface of the sleeve 2.

[0029] The through shaft 3 is a metallic shaft member that is inserted into the sleeve 2 and transmits torque to the flexible shaft 82. The through shaft 3 includes, for example, a spline shaft portion 31 formed on a first end portion 3a, and a spline coupling 32 that fits with the spline shaft portion 31.

[0030] A spline is formed at the tip of the joint portion 81 of the gearbox 8, and the through shaft 3 and the joint portion 81 are connected so as to be able to transmit torque via the splined shaft coupling 32. The splined shaft coupling 32 is a part having a substantially cylindrical shape, and its inner surface is configured so as to be able to be connected to the splined shaft portion 31.

[0031] In this embodiment, the spline shaft portion 31 and the joint portion 81 form the male side of the joint structure, and the spline shaft coupling 32 forms the female side of the joint structure. Note that the joint structure is not limited to the spline shaft coupling structure, and may be any structure that connects the through shaft 3 in a manner that allows torque transmission.

[0032] A support member 4 is disposed on the outer periphery of the splined shaft joint 32. The support member 4 is, for example, a flange-shaped annular member whose diameter is expanded in the radial direction of the splined shaft joint 32. With this configuration, when the support member 4 is brought into contact with the inner periphery of the sleeve 2, it can be easily moved smoothly in the axial direction.

[0033] The support member 4 may be an annular member arranged on the outer periphery of the through shaft 3, and its location may be changed depending on the joint structure of the through shaft 3, or it may be arranged directly on the through shaft 3.

[0034] The through shaft 3 further includes, for example, a reduced diameter portion 33 formed at the second end portion 3b, and a connecting portion 34 for connecting a handle (not shown) for transmitting torque to the through shaft 3. A bearing 5 is inserted into the reduced diameter portion 33. The connecting portion 34 is formed to have a smaller diameter than the reduced diameter portion 33, and is configured so that the bearing 5 can be inserted from the second end portion 3b. The connecting portion 34 is, for example, a threaded portion.

[0035] Bearing 5 is, for example, a radial bearing such as a ball bearing. Bearing 5 is inserted into reduced diameter portion 33 and locked into the stepped portion, and is positioned by stopper 51 fixed to collar 6. Stopper 51 is a short cylinder with a flange portion, and after the short cylinder portion is inserted into the opening of collar 6, the flange portion is fixed to the back surface of collar 6 with a fastener such as a bolt.

[0036] The collar 6 is a metal part having a substantially cylindrical shape. The collar 6 has a tapered portion 61 formed on the first end side and tapering toward the second end side. The tapered portion 61 is configured to guide the through shaft 3, on which the bearing 5 is disposed, into an opening formed around the bearing 5 when the through shaft 3 is inserted from the indoor side (inside).

[0037] The through shaft 3 may have a strength designed according to the allowable torque at the weakest part of the remote control device 1. The weakest part of the remote control device 1 is, for example, a clutch at a joint of a flexible shaft connected between the gear box 8 and the remotely operated device.

[0038] This design makes it possible to reduce the weight and diameter of the through shaft 3. Furthermore, by reducing the diameter of the through shaft 3, the diameters of the sleeve 2 and the through hole H can be made smaller.

[0039] Next, the procedure for installing the above-mentioned remote control device 1 from the outdoor side (outside) will be described with reference to Fig. 2(a) to Fig. 2(d). Here, Fig. 2 is an explanatory diagram showing the procedure for installing the remote control device from the outside, where (a) shows the sleeve insertion process, (b) shows the cover member installation process, (c) shows the gear box installation process, and (d) shows the mortar injection process.

[0040] As a preliminary preparation, a through hole H is formed in the structure W, and the through shaft 3 is attached to the sleeve 2. In addition, a centering jig 23 and a temporary roller 24 are attached to the first end side (first sleeve 21) of the sleeve 2. The centering jig 23 is, for example, a plurality of pin members arranged radially on the sleeve 2.

[0041] As shown in Fig. 2(a), the sleeve 2 with the through shaft 3 attached thereto is inserted from the outdoor side (outside). At this time, since the temporary rollers 24 are arranged on the sleeve 2, the sleeve 2 can be easily moved inside the through hole H. In addition, in this embodiment, since the through shaft 3 and the sleeve 2 are lightweight, the labor required for the insertion operation can be reduced.

[0042] After the sleeve 2 is inserted to a predetermined position, the plate 7 and the cover member 9 are installed from the outdoor side (outside) as shown in Fig. 2(b). The plate 7 is fixed to a stud bolt or the like that is fixed to the wall surface of the structure W. The cover member 9 is disposed so as to seal the opening of the sleeve 2, and is fixed to the plate 7.

[0043] Next, as shown in FIG. 2(c), the plate 7 and the gear box 8 are installed from the indoor side (inside). At this time, the temporary rollers 24 are removed in advance. The plate 7 is fixed to a stud bolt or the like fixed to the wall surface of the structure W. In addition, the joint part 81 of the gear box 8 is fitted into the splined shaft coupling 32 of the through shaft 3. After the gear box 8 is installed, the flexible shaft 82 is connected to the gear box 8.

[0044] 2(d), mortar M is injected from an injection port formed in the indoor (inner) plate 7 into the space formed between the sleeve 2 and the through hole H. When injecting mortar M, the cover member 9 may be temporarily removed and a U-shaped pipe may be connected to the outdoor (outer) plate 7 to circulate the mortar M.

[0045] Next, the procedure for installing the above-mentioned remote control device 1 from the indoor side (inside) will be described with reference to Fig. 3(a) to Fig. 3(d). Here, Fig. 3 is an explanatory diagram showing the procedure for installing the remote control device from the inside, where (a) shows the sleeve insertion process, (b) shows the gear box installation process, (c) shows the cover member installation process, and (d) shows the mortar injection process.

[0046] As a preliminary preparation, a through hole H is formed in the structure W, and the through shaft 3 is attached to the sleeve 2. In addition, a centering jig 23 and a temporary roller 24 are attached to the second end side (second sleeve 22) of the sleeve 2. The centering jig 23 is, for example, a plurality of pin members arranged radially on the sleeve 2.

[0047] As shown in Fig. 3(a), the sleeve 2 with the through shaft 3 attached thereto is inserted from the indoor side (inside). At this time, since the temporary rollers 24 are arranged on the sleeve 2, the sleeve 2 can be easily moved inside the through hole H. In addition, in this embodiment, since the through shaft 3 and the sleeve 2 are lightweight, the labor required for the insertion work can be reduced.

[0048] After the sleeve 2 is inserted to a predetermined position, the plate 7 and the gear box 8 are installed from the indoor side (inside) as shown in Fig. 3(b). The plate 7 is fixed to a stud bolt or the like fixed to the wall surface of the structure W. In addition, the joint part 81 of the gear box 8 is fitted into the splined shaft coupling 32 of the through shaft 3. After the gear box 8 is installed, the flexible shaft 82 is connected to the gear box 8.

[0049] Next, as shown in Fig. 3(c), the plate 7 and the lid member 9 are installed from the outdoor side (outside). At this time, the temporary rollers 24 are removed. The plate 7 is fixed to a stud bolt or the like that is fixed to the wall surface of the structure W. The lid member 9 is disposed so as to seal the opening of the sleeve 2, and is fixed to the plate 7.

[0050] 3(d), mortar M is injected from an injection port formed in the indoor (inner) plate 7 into the space formed between the sleeve 2 and the through hole H. When injecting mortar M, the cover member 9 may be temporarily removed and a U-shaped pipe may be connected to the outdoor (outer) plate 7 to circulate the mortar M.

[0051] In the above-described embodiment, since the sleeve 2 and the plate 7 are constructed separately, the sleeve 2 equipped with the through shaft 3 can be inserted into the through hole H from both the outdoor side (outside) and the indoor side (inside).

[0052] Next, the procedure for removing the through shaft 3 from the sleeve 2 to the outdoor side (outside) will be described with reference to Fig. 4(a) to Fig. 4(c). Here, Fig. 4 is an explanatory diagram showing the procedure for taking out the through shaft to the outside, where (a) shows the cover member removal process, (b) shows the stopper removal process, and (c) shows the through shaft removal process.

[0053] When the through shaft 3 is taken out to the outdoor side (outside) for maintenance or the like, the cover member 9 is removed from the plate 7 as shown in Fig. 4(a). Next, the stopper 51 is removed from the collar 6 as shown in Fig. 4(b).

[0054] In this state, as shown in Fig. 4(c), by pulling the through shaft 3 towards the outdoor side (outside), the through shaft 3 can be taken out to the outdoor side (outside). At this time, the splined shaft coupling 32 also moves, so the through shaft 3 can be easily moved while maintaining the parallelism of the through shaft 3 by the support member 4. When the through shaft 3 is completely taken out to the outside, the splined shaft coupling 32 is engaged with the collar 6 and remains inside the sleeve 2.

[0055] After maintenance is completed, when inserting the through shaft 3 into the sleeve 2 from the outdoor side (outside), the spline shaft portion 31 is fitted into the spline joint 32, and then the through shaft 3 is moved all the way to the back, and the spline joint 32 is fitted into the joint portion 81.

[0056] Next, the procedure for removing the through shaft 3 from the sleeve 2 to the indoor side (inside) will be described with reference to Fig. 5(a) to Fig. 5(c). Here, Fig. 5 is an explanatory diagram showing the procedure for taking out the through shaft to the inside, where (a) shows the step of removing the flexible shaft of the gearbox, (b) shows the step of removing the gearbox, and (c) shows the step of removing the through shaft.

[0057] When the through shaft 3 is taken out to the indoor side (inside) for maintenance or the like, the flexible shaft 82 is removed from the gear box 8 as shown in Fig. 5(a). Next, the gear box 8 is removed as shown in Fig. 5(b).

[0058] In this state, as shown in Fig. 5(c), the through shaft 3 can be removed to the indoor side (inside) by pulling it toward the indoor side (inside). At this time, the bearing 5 also moves, so that the through shaft 3 can be easily moved while maintaining the parallelism of the through shaft 3 by the bearing 5. Note that the spline coupling 32 may be removed first, and then the through shaft 3 can be removed.

[0059] After maintenance is completed, when inserting the through shaft 3 into the sleeve 2 from the indoor side (inside), the through shaft 3 with the bearing 5 attached can be inserted into the sleeve 2. At this time, by bringing the bearing 5 into contact with the tapered portion 61 of the collar 6, the through shaft 3 can be easily centered.

[0060] According to the remote control device 1 of this embodiment described above, the first end 3a of the through shaft 3 is supported by the support member 4, and the second end 3b of the through shaft 3 is supported by the bearing 5 and the collar 6, so that the parallelism of the through shaft 3 can be maintained while supporting the weight of the through shaft 3, and the through shaft 3 can be easily moved within the sleeve 2. Therefore, according to this embodiment, the time required for the removal and insertion of the through shaft 3 can be shortened.

[0061] In addition, in the above-described embodiment, the case where the through shaft 3 is attached to the sleeve 2 and then installed in the through hole H is described, but it is also possible to install the sleeve 2 in the through hole H and then attach the through shaft 3 to the sleeve 2.

[0062] The present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the spirit of the present invention. [Explanation of symbols]

[0063] 1 Remote control device 2 Sleeve 3. Through shaft 3a First end 3b Second end 4 Support member 5. Bearings 6 Color 7 Plate 8. Gearbox 9 Lid member 21 First Sleeve 22 Second Sleeve 23 Centering jig 24 Temporary Roller 31 Spline shaft section 32 Spline coupling 33 Reduced diameter part 34 Connection 51 Stopper 61 Tapered section 81 Joint 82 Flexible Shaft 91 Handle 92 Sealing material

Claims

1. A remote control device for operating a device disposed inside a structure that divides a space from outside the structure, comprising: A sleeve disposed in a through hole formed in the structure; a through shaft insertable into the sleeve; A support member disposed on a first end side of the through shaft; a bearing disposed on a second end side of the through shaft; a collar disposed on an inner periphery of the sleeve and fitted with the bearing; The through shaft includes a spline shaft portion formed at the first end portion and a spline shaft coupling fitted to the spline shaft portion, and the support member is disposed at the spline shaft coupling. A remote control device comprising:

2. The remote control device according to claim 1 , wherein the support member is an annular member disposed on an outer periphery of the through shaft.

3. The remote control device according to claim 1 , wherein the collar has a tapered portion formed on the first end side and tapered toward the second end side.

4. The remote control device of claim 1 , wherein the sleeve comprises a first sleeve that is relatively narrow and a second sleeve that is relatively wide, and the collar is disposed between the first sleeve and the second sleeve.

5. 2. The remote control device according to claim 1, wherein the through shaft has a strength designed to match the allowable torque at the weakest point of the remote control device.

6. The remote control device of claim 1 , further comprising a plate connected to each end of the sleeve and fixed to the structure.

7. The remote control device according to claim 1 , further comprising a cover member for sealing an outer end of the sleeve in a water-tight manner.

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