Manual emergency driving device with adjustable operation distance for nuclear power station

Abstract

The invention discloses a manual emergency driving device with an adjustable operation distance for a nuclear power station. The manual emergency driving device comprises a hand-cranking mechanism, a driving mechanism and a driving mechanism, the flexible shaft mechanism is used for transmitting the power transmitted by the hand-cranking mechanism in a space with an adjustable operation distance; and the driving mechanism is used for being connected with a walking structure or a hoisting mechanism in the hoisting equipment, and based on the power transmitted by the flexible shaft mechanism, the walking structure or the hoisting mechanism is operated to a safe area and then the load is released. The manual emergency driving device with the adjustable operation distance can enable the operation space to be larger and safer, is different from a traditional manual operation mechanism which directly acts on a driving mechanism, and is small in space and large in danger.

Description

Technical Field

[0001] The invention belongs to the technical field of nuclear power plant lifting equipment and relates to a manual emergency driving device with adjustable operating distance for a nuclear power plant. Background Art

[0002] The loader and unloader is located in the reactor building of the nuclear power plant across the refueling pool. It is an important equipment for fuel operation and storage. The loader and unloader operates in the refueling area of ​​the reactor building and is used to lift fuel assemblies from the fuel transfer device, the reactor core and the reactor building fuel storage rack.

[0003] The design of the loader can prevent the possibility of a single failure of the equipment caused by the fall of fuel assemblies. The trolley operation, car operation and lifting mechanism are all driven by motors. Once the loader fails and the power is cut off, the motor can be operated manually by the operator using the handwheel to drive the loader to place the load in a safe area. When not in use, the handwheel is fixed to the bracket next to the drive motor, and there is an interlocking proximity switch on the bracket. Normal power-on drive can only be performed when the respective handwheel is on its bracket.

[0004] At present, the emergency drive of lifting equipment on the market is directly driven by a handwheel acting on the drive motor. Due to the limitation of factory space, the structural design of the drive mechanism is relatively compact. When directly operating the emergency drive device, the space is limited and the operator needs to turn sideways or bend over to operate, which brings great inconvenience and even danger. Summary of the invention

[0005] In order to solve the problem that the emergency drive of the lifting equipment on the market is directly driven by the hand wheel on the drive motor, the structural design of the drive mechanism is relatively compact due to the limitation of the plant space, and the space is limited when directly operating the emergency drive device. The operator needs to turn sideways or bend over to operate, which brings great inconvenience and even danger. The technical solution adopted by the present invention is: a manual emergency drive device with adjustable operating distance for nuclear power plants, comprising:

[0006] Hand crank mechanism: used for power transmission;

[0007] Flexible shaft mechanism: used to transmit the power transmitted by the hand-crank mechanism within a space with adjustable operating distance;

[0008] Driving mechanism: used to connect with the traveling mechanism or lifting mechanism in the lifting equipment, based on the power transmitted by the flexible shaft mechanism, the traveling mechanism or lifting mechanism is moved to a safe area and then the load is released.

[0009] Furthermore: it also includes a fixing device for fixing the flexible shaft mechanism on the hand-cranked mechanism.

[0010] Further: the flexible shaft mechanism includes a screw, a connecting concave head, a dust cover, an outer shaft, a bearing, an inner shaft and a connecting convex head;

[0011] The outer shaft is arranged outside the inner shaft;

[0012] One end of the inner shaft is riveted and connected via a connecting concave head, and the other end of the inner shaft is riveted and connected via a connecting convex head;

[0013] The bearings are arranged at both ends of the inner shaft, so that the inner shaft rotates inside the outer shaft to transmit torque.

[0014] Furthermore, dust covers are respectively arranged at both ends of the outer shaft to seal and protect the bearings.

[0015] Furthermore: the connecting female head is connected to the driving mechanism through a screw; the connecting male head is connected to the hand-cranking mechanism through a flat key.

[0016] Furthermore: the outer shaft is made of stainless steel.

[0017] Further: the fixing device comprises: a connecting bracket, a fixing support and a connecting bolt;

[0018] The fixed support is fixed on the connecting bracket;

[0019] The other end of the flexible shaft mechanism passes through the fixed support and is fixed by a fixing bolt, and the connecting bracket is fixed at a position convenient for operation by the connecting bolt.

[0020] Further: the hand crank mechanism comprises: a connecting piece, a baffle, a fastener, a hand crank bracket and a hand crank handle;

[0021] The connecting piece is connected to the flexible shaft mechanism;

[0022] After the hand crank handle and one end of the hand crank bracket are welded into a whole,

[0023] The other end of the hand-cranked bracket is connected to the fastener;

[0024] The baffle is arranged below the fastener;

[0025] A connecting piece is arranged below the fastener; the connecting piece, the fastener and the baffle are coaxially fixedly connected.

[0026] The present invention provides a manual emergency drive device with adjustable operating distance for use in a nuclear power plant. The present invention is suitable for use in a nuclear power plant when a loader and unloader equipment fails and the power is cut off, and the drive mechanism cannot work normally. The drive mechanism of this manual emergency drive device can be used to release the load in a safe area. It can also be used for manual emergency drive operations in other harsh environments.

[0027] After application, the present invention can further improve the safety performance of nuclear power plant equipment operation, reduce the accident rate, and has the following advantages:

[0028] 1. By adding a flexible shaft mechanism 2, the hand-crank mechanism can be set in a safe place with a large space and convenient operation, which greatly reduces the danger of the operator.

[0029] 2. The length of the flexible shaft mechanism 2 can be customized according to the actual situation of each site to achieve adjustable operating distance;

[0030] In summary, the manual emergency drive device with adjustable operating distance of the present invention can make the operating space larger and safer, which is different from the previous manual operating mechanism that directly acts on the driving mechanism, with a small space and high risk.

[0031] The present invention can better meet the high safety requirements of nuclear power plants. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0033] Figure 1 It is a schematic diagram of the layout of the manual emergency driving device with adjustable operating distance of the present invention;

[0034] Figure 2 is a schematic diagram of the drive mechanism;

[0035] Figure 3 It is a schematic diagram of the flexible shaft mechanism;

[0036] Figure 4 is a schematic diagram of the fixture;

[0037] Figure 5 It is a schematic diagram of the hand-crank mechanism;

[0038] Reference numerals: 1. driving mechanism; 2. flexible shaft mechanism; 3. fixing device; 4. hand-cranking mechanism;

[0039] 101. Driving motor, 102. Coupling key, 201. Screw, 202. Connecting socket, 203. Dust cover, 204. Stainless steel outer shaft, 205. Bearing, 206. Inner shaft, 207. Connecting convex head, 208. Flat key, 301. Connecting bracket, 302. Fixing bolt, 303. Fixing support, 304. Connecting bolt, 401. Connecting piece, 402. Baffle, 403. Fastener, 404. Hand crank bracket, 405. Hand crank handle. DETAILED DESCRIPTION

[0040] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0041] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] Figure 1 It is a schematic diagram of the layout of the manual emergency driving device with adjustable operating distance of the present invention;

[0043] A manual emergency driving device with adjustable operating distance for a nuclear power plant, comprising:

[0044] Hand crank mechanism 4: used for power transmission;

[0045] Flexible shaft mechanism 2: used to transmit the power transmitted by the hand-crank mechanism 4 within a space with adjustable operating distance;

[0046] Driving mechanism: used to connect with the walking structure or lifting mechanism in the lifting equipment, based on the power transmitted by the flexible shaft mechanism 2, the walking structure or lifting mechanism is moved to a safe area and then the load is released.

[0047] The device also includes a fixing device 3 for fixing the flexible shaft mechanism 2 on the hand-cranked mechanism 4.

[0048] The device is suitable for use in nuclear power plants;

[0049] When a power failure suddenly occurs during the operation of the loader and unloader, the drive mechanism cannot rely on electricity to drive normally. At this time, the flexible shaft mechanism 2 is connected to the drive mechanism, and the other end of the flexible shaft mechanism 2 is extended and fixed in a safe and easy-to-operate place through the fixing device 3, and then the hand-crank mechanism 4 is connected to the other end of the flexible shaft mechanism 2. After the connection, the operator can use the hand-crank mechanism 4 to drive the loader and unloader to a safe area in an emergency and release the load. According to the current process, since the length of the flexible shaft mechanism 2 can be adjusted, in conjunction with the hand-crank mechanism 4, the operator's operating position can be more flexible and the operating space can be safer.

[0050] Figure 2is a schematic diagram of the drive mechanism;

[0051] The driving mechanism includes: a driving motor 101 and a connecting key 102;

[0052] The driving motor 101 of the driving mechanism is connected to the flexible shaft mechanism 2 via a connecting key 102, and the connection is simple, safe and fast.

[0053] Figure 3 It is a schematic diagram of the flexible shaft mechanism;

[0054] The flexible shaft mechanism 2 includes a screw 201, a connecting concave head 202, a dust cover 203, an outer shaft 204, a bearing 205, an inner shaft 206, a connecting convex head 207 and a flat key 208;

[0055] The outer shaft 204 is disposed outside the inner shaft 206;

[0056] One end of the inner shaft 206 is riveted and connected via the connecting concave head 202, and the other end of the inner shaft 206 is riveted and connected via the connecting convex head 207;

[0057] The bearings 205 are disposed at both ends of the inner shaft 206 so that the inner shaft rotates inside the outer shaft to transmit torque.

[0058] Dust covers 203 are respectively provided at both ends of the outer shaft 204 to seal and protect the bearings 205 .

[0059] The connecting concave head 202 is connected to the driving mechanism through the screw 201 and the connecting key 102; the connecting convex head 207 is connected to the hand-cranking mechanism 4 through the flat key 208, and the stainless steel outer shaft 204 is connected to the fixing device 3, which can fix the end of the flexible shaft mechanism 2 in an appropriate position, making it safer for the operator to operate the hand-cranking mechanism 4;

[0060] The outer shaft 204 is made of stainless steel.

[0061] The lengths of the outer shaft 204 and the inner shaft 206 can be set according to operational requirements;

[0062] Figure 4 is a schematic diagram of the fixture;

[0063] The fixing device 3 comprises: a connecting bracket 301, a fixing support 303 and a connecting bolt 304;

[0064] The fixing support 303 is fixed on the connecting bracket 301;

[0065] The other end of the flexible shaft mechanism 2 passes through the fixed support 303 and is fixed by the fixing bolt 302. The fixed support 303 and the connecting bracket 301 are connected as a whole. The connecting bracket 301 is fixed in a position convenient for operation by the connecting bolt 304. The mechanism is simple, stable and reliable.

[0066] The fixing bracket comprises a transverse support plate and a longitudinal connecting plate integrally connected to the transverse support plate;

[0067] A through hole is provided in the middle of the transverse support plate;

[0068] Figure 5 is a schematic diagram of the hand-crank mechanism 4;

[0069] The hand crank mechanism 4 includes: a connecting member 401, a baffle 402, a fastener 403, a hand crank bracket 404 and a hand crank handle 405;

[0070] The connecting member 401 is connected to the flexible shaft mechanism 2;

[0071] After the hand crank handle 405 and one end of the hand crank bracket 404 are welded into a whole,

[0072] The other end of the hand-crank bracket 404 is connected to the fastener 403;

[0073] The baffle 402 is disposed below the fastener 403;

[0074] A connecting member 401 is disposed below the fastener 403; the connecting member 401, the fastener 403 and the baffle 402 are coaxially fixedly connected.

[0075] The connecting member 401 is connected to the flexible shaft mechanism 2 via the flat key 208, and the flexible shaft mechanism 2 is connected to the fixing device 3 via the fixing bolt 302;

[0076] Fastener 403 and baffle 402;

[0077] The fastener 403 is a standard M6 bolt of GB / T5783-2016, and the baffle 402 is a circular steel plate with a thickness of 4 mm and a diameter of 26 mm, and a hole with a diameter of 7 mm is opened in the center.

[0078] The implementation location is a nuclear power plant. When the equipment fails and the power is cut off, the manual emergency drive has a compact space and is very dangerous. This invention puts the operator in a safer operating space, is easy to operate, and fully meets the use requirements of the nuclear power plant.

[0079] This hand-crank mechanism 4 has a simple structure and is quick to connect.

[0080] The present invention is suitable for use in a nuclear power plant loader and unloader equipment when a fault occurs and the power is cut off, and the drive mechanism 1 cannot work normally. This manual emergency drive device drive mechanism 1 can be used to release the load in a safe area, and can also be used for manual emergency drive operations in other harsh environments.

[0081] The device of the present application is implemented in a nuclear power plant. When the equipment fails and the power is cut off, the manual emergency drive space is compact and dangerous. This invention places the operator in a safer operating space, is easy to operate, and fully meets the use requirements of the nuclear power plant.

[0082] After application, the present invention can further improve the safety performance of nuclear power plant equipment operation and reduce the accident rate.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A manual emergency drive device with adjustable operating distance for a nuclear power plant, characterized in that: include: Hand crank mechanism: used for power transmission; Flexible shaft mechanism: used to transmit the power transmitted by the hand-crank mechanism within a space with adjustable operating distance; Driving mechanism: used to connect with the traveling mechanism or lifting mechanism in the lifting equipment, based on the power transmitted by the flexible shaft mechanism, the traveling mechanism or lifting mechanism is moved to a safe area and then the load is released.

2. A manual emergency driving device with adjustable operating distance for a nuclear power plant according to claim 1, characterized in that: It also includes a fixing device for fixing the flexible shaft mechanism on the hand-cranked mechanism.

3. The manual emergency driving device with adjustable operating distance for a nuclear power plant according to claim 1, characterized in that: The flexible shaft mechanism comprises a screw, a connecting concave head, a dust cover, an outer shaft, a bearing, an inner shaft and a connecting convex head; The outer shaft is arranged outside the inner shaft; One end of the inner shaft is riveted and connected via a connecting concave head, and the other end of the inner shaft is riveted and connected via a connecting convex head; The bearings are arranged at both ends of the inner shaft, so that the inner shaft rotates inside the outer shaft to transmit torque.

4. The manual emergency driving device with adjustable operating distance for use in a nuclear power plant according to claim 1, characterized in that: Dust covers are respectively arranged at both ends of the outer shaft to seal and protect the bearings.

5. The manual emergency driving device with adjustable operating distance for use in a nuclear power plant according to claim 1, characterized in that: The connecting concave head is connected to the driving mechanism through a screw; the connecting convex head is connected to the hand-cranking mechanism through a flat key.

6. A manual emergency driving device with adjustable operating distance for a nuclear power plant according to claim 1, characterized in that: The outer shaft is made of stainless steel.

7. A manual emergency driving device with adjustable operating distance for a nuclear power plant according to claim 2, characterized in that: The fixing device comprises: a connecting bracket, a fixing support and a connecting bolt; The fixed support is fixed on the connecting bracket; The other end of the flexible shaft mechanism passes through the fixed support and is fixed by a fixing bolt, and the connecting bracket is fixed at a position convenient for operation by the connecting bolt.

8. The manual emergency driving device with adjustable operating distance for use in a nuclear power plant according to claim 1, characterized in that: The hand-crank mechanism comprises: a connecting piece, a baffle, a fastener, a hand-crank bracket and a hand-crank handle; The connecting piece is connected to the flexible shaft mechanism; After the hand crank handle and one end of the hand crank bracket are welded into a whole, The other end of the hand-cranked bracket is connected to the fastener; The baffle is arranged below the fastener; A connecting piece is arranged below the fastener; the connecting piece, the fastener and the baffle are coaxially fixedly connected.

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