Nuclear power main pump main bolt installation tool

Abstract

The invention provides a nuclear power main pump main bolt installation tool, and relates to the technical field of nuclear power main pump installation. The nuclear power main pump main bolt installation tool comprises a movable base, a supporting seat is installed on the movable base, a first supporting frame is installed on the supporting seat, a lifting driving mechanism is installed on the first supporting frame, a second supporting frame is installed on the lifting driving mechanism, a rotating mechanism is installed on the second supporting frame, and a third supporting frame is installed on the rotating mechanism. The third supporting frame can horizontally rotate through a rotating mechanism, a holding limiting mechanism and a jacking driving mechanism are installed on the third supporting frame, a rotation limiting seat is installed on the jacking driving mechanism, and the rotation limiting seat can horizontally rotate relative to the jacking driving mechanism. The nuclear power main pump main bolt can vertically penetrate through the enclasping limiting mechanism, and the lower end of the nuclear power main pump main bolt is placed in the rotation limiting seat in a limited mode. Based on the technical scheme, the mounting tool for the main bolt of the nuclear power main pump can assist in screwing the main bolt into the housing.

Description

Technical Field

[0001] The invention relates to the technical field of nuclear power main pump installation, and in particular to a nuclear power main pump main bolt installation tool. Background Art

[0002] The domestic CAP1400 main pump is installed in a small compartment. After the main pump is lifted into place, it is suspended and installed under the main pump casing by the main bolts. Due to the large size of the main pump and the small size of the compartment, the gap is only 50mm in some areas. In addition, the main bolts are long and heavy, and the main bolts can only be passed through the main pump flange from below and screwed into the threads on the main pump casing. There is currently no effective way to screw the main bolts into the casing. Therefore, it is necessary to design a nuclear power main pump main bolt installation tool to assist in screwing the main bolts into the casing. Summary of the invention

[0003] In view of the above problems in the prior art, the present application proposes a nuclear power main pump main bolt installation tool for assisting in screwing the main bolt into the casing.

[0004] The present invention provides a nuclear power main pump main bolt installation tool, the nuclear power main pump main bolt installation tool comprises a movable base, a support base is installed on the movable base, a first support frame is installed on the support base, a lifting drive mechanism is installed on the first support frame, a second support frame is installed on the lifting drive mechanism, a rotating mechanism is installed on the second support frame, a third support frame is installed on the rotating mechanism, the third support frame can be horizontally rotated through the rotating mechanism, a clamping limit mechanism and a jacking drive mechanism are installed on the third support frame, a swivel limit seat is installed on the jacking drive mechanism, the swivel limit seat can be horizontally rotated relative to the jacking drive mechanism, the main bolts of the nuclear power main pump can vertically pass through the clamping limit mechanism and the lower end of the main bolts of the nuclear power main pump is limited and placed in the swivel limit seat.

[0005] As a further improvement of the above technical solution:

[0006] The above-mentioned nuclear power main pump main bolt installation tool further comprises: the first support frame is horizontally slidably installed on the support seat, and the support seat is installed on the movable base through a slewing bearing.

[0007] The above-mentioned nuclear power main pump main bolt installation tool, further, the rotary limit seat includes a rotary connection, a shock absorbing mechanism and a limit cylinder, the rotary connection is installed on the jacking drive mechanism, and the limit cylinder is installed on the rotary connection through the shock absorbing mechanism.

[0008] The above-mentioned nuclear power main pump main bolt installation tool, further, the shock absorbing mechanism includes an upper support plate and a lower support plate, the limit cylinder is installed on the upper support plate, the lower support plate is installed on the rotary connecting piece, and multiple groups of shock absorbing components are installed between the upper support plate and the lower support plate.

[0009] The above-mentioned nuclear power main pump main bolt installation tool, further, the shock absorbing assembly includes a guide column and a shock absorbing spring, the guide column is vertically installed on the lower support plate, the upper support plate is provided with a guide hole, the upper end portion of the guide column is limited in the guide hole and the upper support plate can move vertically relative to the guide column, the shock absorbing spring is sleeved on the guide column, and the two ends of the shock absorbing spring are respectively abutted against the lower surface of the upper support plate and the upper surface of the lower support plate.

[0010] The above-mentioned nuclear power main pump main bolt installation tool further has a vertical guide groove on the lower support plate, and a vertical guide protrusion on the upper support plate. The vertical guide protrusion can be limited in the vertical guide groove and can move vertically relative to the vertical guide groove.

[0011] The above-mentioned nuclear power main pump main bolt installation tool further has the vertical guide groove being located at the center of the lower support plate, and a plurality of groups of the shock absorbing components being evenly spaced and arranged around the periphery of the vertical guide groove.

[0012] The above-mentioned nuclear power main pump main bolt installation tool, further, the rotating connecting part includes a rotating support cylinder, a limiting cover plate and a rotating bearing, the lower support plate is provided with a rotating shaft, the limiting cover plate is provided with a limiting hole, the rotating shaft passes through the limiting hole, the rotating bearing is sleeved on the rotating shaft, the rotating bearing is limited in the rotating support cylinder, the limiting cover plate is detachably installed on the upper end of the rotating support cylinder, and the limiting cover plate is used to limit the rotating bearing in the rotating support cylinder.

[0013] The above-mentioned nuclear power main pump main bolt installation tool further has a limiting groove on the outer side wall of the upper support plate, and the end of the crowbar can be limited in the limiting groove to rotate the limiting cylinder through the crowbar.

[0014] The above-mentioned nuclear power main pump main bolt installation tool further has at least two support seats installed on the movable base.

[0015] The above technical features can be combined in various suitable ways or replaced by equivalent technical features as long as the purpose of the present invention can be achieved.

[0016] The main bolt installation tool for a nuclear power main pump provided by the present invention has at least the following beneficial effects compared with the prior art: when it is necessary to screw the nuclear power main pump into the casing through the main bolt, the main bolt of the nuclear power main pump is first hoisted and vertically passed through the clamping limit mechanism, and the lower end of the main bolt of the nuclear power main pump is limited and placed in the rotary limit seat, and then the movable base is moved to the lower side of the nuclear power main pump to avoid interference between the support frame and the main pump, and then the lifting drive mechanism drives the second support frame to rise relative to the first support frame, so that the upper end of the main bolt of the nuclear power main pump passes through the main pump flange and is close to the thread of the main pump casing, Finally, the operator uses tools such as crowbars to rotate the slewing limit seat, and at the same time the jacking drive mechanism applies an upward force to the slewing limit seat to screw the main bolts of the nuclear power main pump into the main pump cover; after one of the main bolts of the nuclear power main pump is installed, the jacking drive mechanism descends and resets, driving the third support frame to rotate relative to the second support frame through the rotation mechanism until the slewing limit seat is outside the coverage of the main pump flange, and then the main bolt can be directly lifted into the slewing limit seat on the spot or directly lifted from the original position to avoid the influence of the main pump cover above, thereby realizing the lifting operation from above.

[0017] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0019] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings, wherein:

[0020] Figure 1 A schematic structural diagram of a nuclear power main pump main bolt installation tool provided by an embodiment of the present invention is shown.

[0021] Figure 2 Shows Figure 1 A magnified image of area A;

[0022] Figure 3 A structural schematic diagram of a rotary limit seat of a nuclear power main pump main bolt installation tool provided by an embodiment of the present invention is shown.

[0023] In the drawings, like reference numerals are used for like parts. The drawings are not necessarily to scale.

[0024] Description of reference numerals:

[0025] 100-nuclear power main pump main bolt installation tool, 110-mobile base, 120-support seat, 121-slewing bearing, 130-first support frame, 131-lifting drive mechanism, 140-second support frame, 141-rotation mechanism, 150-third support frame, 151-holding limit mechanism, 152-jacking drive mechanism, 153-slewing limit seat, 154-slewing connecting piece, 155-shock absorbing mechanism, 156-limiting cylinder, 157-upper support plate, 158-lower support plate, 159-guide column, 160-shock absorbing spring, 161-guide hole, 162-vertical guide groove, 163-vertical guide protrusion, 164-slewing support cylinder, 165-limiting cover plate, 166-slewing bearing, 167-slewing shaft, 168-limiting groove. DETAILED DESCRIPTION

[0026] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0031] The present invention will be further described below in conjunction with the accompanying drawings.

[0032] An embodiment of the present invention provides a nuclear power main pump main bolt installation tool 100 for assisting in screwing the main bolt into a casing.

[0033] See also Figure 1 The main bolt installation tool 100 for a nuclear power main pump provided by an embodiment of the present invention comprises a mobile base 110, a support base 120 is installed on the mobile base 110, a first support frame 130 is installed on the support base 120, a lifting drive mechanism 131 is installed on the first support frame 130, a second support frame 140 is installed on the lifting drive mechanism 131, a rotating mechanism 141 is installed on the second support frame 140, and a rotating mechanism 141 is installed on the rotating mechanism 141. The third support frame 150, the third support frame 150 can be horizontally rotated through the rotating mechanism 141, the third support frame 150 is installed with a clamping limit mechanism 151 and a jacking drive mechanism 152, the jacking drive mechanism 152 is installed with a swivel limit seat 153, the swivel limit seat 153 can be horizontally rotated relative to the jacking drive mechanism 152, the main bolts of the nuclear power main pump can vertically pass through the clamping limit mechanism 151 and the lower end of the main bolts of the nuclear power main pump is limited and placed in the swivel limit seat 153.

[0034] When the nuclear power main pump needs to be screwed into the casing through the main bolt, the main bolt of the nuclear power main pump is first hoisted and vertically passed through the clamping limit mechanism 151, and the lower end of the main bolt of the nuclear power main pump is limited and placed in the rotary limit seat 153, and then the movable base 110 is moved to the lower side of the nuclear power main pump to avoid interference between the support frame and the main pump, and then the lifting drive mechanism 131 drives the second support frame 140 to rise relative to the first support frame 130, so that the upper end of the main bolt of the nuclear power main pump passes through the main pump flange and approaches the thread of the main pump casing, and finally the operator uses a tool, such as a crowbar, to rotate the rotary limit seat 153. 3. At the same time, the lifting drive mechanism 152 applies an upward force to the rotary limit seat 153 to screw the main bolt of the nuclear power main pump into the main pump casing; after one of the main bolts of the nuclear power main pump is installed, the lifting drive mechanism 152 descends and resets, driving the third support frame 150 to rotate relative to the second support frame 140 through the rotating mechanism 141, until the rotary limit seat 153 is outside the coverage of the main pump flange, and then the main bolt can be directly lifted into the rotary limit seat 153 on the spot or directly lifted from the original position to avoid the influence of the main pump casing above, and realize the lifting operation from above.

[0035] The nuclear power main pump main bolt installation tool 100 provided in the embodiment of the present invention is further described in detail. Figure 1 , the first support frame 130 is horizontally slidably installed on the support seat 120, and the support seat 120 is installed on the mobile base 110 through the slewing bearing 121. After the mobile base 110 moves to the lower side of the nuclear power main pump, the support seat 120 can be rotated relative to the mobile base 110 through the slewing bearing 121 to be able to install all the main bolts, and the support seat 120 is rotated relative to the mobile base 110 through the slewing bearing 121. In order to avoid interference between the support frame and the main pump protrusion, and interference between the support frame and the column, the first support frame 130 is horizontally slidably installed on the support seat 120. When passing the main pump protrusion position, the support frame can move radially outward relative to the support seat 120, and when passing the column position, the support frame can move radially inward relative to the support seat 120 to avoid interference.

[0036] The nuclear power main pump main bolt installation tool 100 provided in the embodiment of the present invention is further combined with Figure 2 and Figure 3 The rotary limit seat 153 includes a rotary connection member 154, a shock absorbing mechanism 155 and a limit cylinder 156. The rotary connection member 154 is mounted on the lifting drive mechanism 152, and the limit cylinder 156 is mounted on the rotary connection member 154 through the shock absorbing mechanism 155. When the upper end of the main bolt is lifted to the thread of the main pump housing and screwed into the thread, in order to avoid excessive force causing damage to the main bolt or the main pump housing thread, a shock absorbing mechanism 155 is arranged under the main bolt.

[0037] For details, please combine Figure 2 and Figure 3 The shock absorbing mechanism 155 includes an upper support plate 157 and a lower support plate 158. The limiting cylinder 156 is installed on the upper support plate 157. The lower support plate 158 is installed on the rotary connecting member 154. A plurality of shock absorbing components are installed between the upper support plate 157 and the lower support plate 158. The shock absorbing component includes a guide column 159 and a shock absorbing spring 160. The guide column 159 is vertically installed on the lower support plate 158. A guide hole 161 is provided on the upper support plate 157. The upper end of the guide column 159 is limited in the guide hole 161 and the upper support plate 157 can move vertically relative to the guide column 159. The shock absorbing spring 160 is sleeved on the guide column 159, and the two ends of the shock absorbing spring 160 are respectively in contact with the lower surface of the upper support plate 157 and the upper surface of the lower support plate 158. When the upper end of the main bolt of the nuclear power main pump is lifted to the thread of the main pump cover and screwed into the thread, a shock absorbing mechanism 155 is arranged on the rotary limit seat 153. Under the action of the shock absorbing spring 160, the upper support plate 157 will elastically move vertically a certain distance relative to the lower support plate 158, thereby avoiding damage to the main bolt or the thread of the main pump cover caused by excessive force.

[0038] The nuclear power main pump main bolt installation tool 100 provided in the embodiment of the present invention is further combined with Figure 2 and Figure 3 , a vertical guide groove 162 is provided on the lower support plate 158, and a vertical guide protrusion 163 is provided on the upper support plate 157. The vertical guide protrusion 163 can be limited in the vertical guide groove 162 and can move vertically relative to the vertical guide groove 162. The vertical guide protrusion 163 cooperates with the vertical guide groove 162 to ensure that the upper support plate 157 moves vertically relative to the lower support plate 158. In this embodiment, the vertical guide groove 162 is located at the center of the lower support plate 158, and a plurality of groups of shock absorbing components are evenly spaced and arranged around the outer periphery of the vertical guide groove 162. The rotary connecting member 154 includes a rotary support cylinder 164, a limiting cover plate 165 and a rotary bearing 166. A rotary shaft 167 is provided on the lower support plate 158. A limiting hole is provided on the limiting cover plate 165. The rotary shaft 167 passes through the limiting hole. The rotary bearing 166 is sleeved on the rotary shaft 167. The rotary bearing 166 is limited in the rotary support cylinder 164. The limiting cover plate 165 is detachably mounted on the upper end of the rotary support cylinder 164. The limiting cover plate 165 is used to limit the rotary bearing 166 in the rotary support cylinder 164. The outer wall of the upper support plate 157 is provided with a limiting groove 168. The end of the crowbar can be limited in the limiting groove 168 so that the limiting cylinder 156 can be rotated by the crowbar.

[0039] In this embodiment, at least two support seats 120 are installed on the mobile base 110. When installing the main bolts of the nuclear power main pump, the installation tools on the two support seats 120 simultaneously install the main bolts of the nuclear power main pump, thereby improving the efficiency of the installation of the main bolts of the nuclear power main pump.

[0040] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0041] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the various dependent claims and features described herein may be combined in a manner different from that described in the original claims. It should also be understood that features described in conjunction with individual embodiments may be used in other described embodiments.

Claims

1. A nuclear power main pump main bolt installation tool, characterized in that: The main bolt installation tool for the nuclear power main pump includes a movable base, a support base is installed on the movable base, a first support frame is installed on the support base, a lifting drive mechanism is installed on the first support frame, a second support frame is installed on the lifting drive mechanism, a rotating mechanism is installed on the second support frame, a third support frame is installed on the rotating mechanism, the third support frame can rotate horizontally through the rotating mechanism, a clamping limit mechanism and a jacking drive mechanism are installed on the third support frame, a swivel limit seat is installed on the jacking drive mechanism, and the swivel limit seat can rotate horizontally relative to the jacking drive mechanism, the main bolt of the nuclear power main pump can vertically pass through the clamping limit mechanism and the lower end of the main bolt of the nuclear power main pump is limited and placed in the swivel limit seat.

2. The main bolt installation tool for a nuclear power main pump according to claim 1, characterized in that: The first support frame is horizontally slidably mounted on the support seat, and the support seat is mounted on the movable base via a slewing bearing.

3. The main bolt installation tool for a nuclear power main pump according to claim 1, characterized in that: The rotary limit seat comprises a rotary connection piece, a shock absorbing mechanism and a limit cylinder. The rotary connection piece is mounted on the lifting drive mechanism, and the limit cylinder is mounted on the rotary connection piece through the shock absorbing mechanism.

4. The main bolt installation tool for a nuclear power main pump according to claim 3 is characterized in that: The shock absorbing mechanism comprises an upper support plate and a lower support plate, the limiting cylinder is mounted on the upper support plate, the lower support plate is mounted on the rotary connecting member, and a plurality of shock absorbing components are mounted between the upper support plate and the lower support plate.

5. The main bolt installation tool for a nuclear power main pump according to claim 4 is characterized in that: The shock absorbing assembly includes a guide column and a shock absorbing spring. The guide column is vertically mounted on the lower support plate. A guide hole is provided on the upper support plate. The upper end portion of the guide column is limited in the guide hole and the upper support plate can move vertically relative to the guide column. The shock absorbing spring is sleeved on the guide column, and both ends of the shock absorbing spring are respectively abutted against the lower surface of the upper support plate and the upper surface of the lower support plate.

6. The main bolt installation tool for a nuclear power main pump according to claim 4, characterized in that: The lower support plate is provided with a vertical guide groove, and the upper support plate is provided with a vertical guide protrusion. The vertical guide protrusion can be limited in the vertical guide groove and can move vertically relative to the vertical guide groove.

7. The main bolt installation tool for a nuclear power main pump according to claim 6, characterized in that: The vertical guide groove is located at the center of the lower support plate, and a plurality of groups of shock absorbing components are evenly spaced and arranged around the outer periphery of the vertical guide groove.

8. The main bolt installation tool for a nuclear power main pump according to claim 4, characterized in that: The slewing connection member includes a slewing support cylinder, a limiting cover plate and a slewing bearing. The lower support plate is provided with a slewing shaft. The limiting cover plate is provided with a limiting hole. The slewing shaft passes through the limiting hole. The slewing bearing is sleeved on the slewing shaft. The slewing bearing is limited in the slewing support cylinder. The limiting cover plate is detachably installed on the upper end of the slewing support cylinder. The limiting cover plate is used to limit the slewing bearing in the slewing support cylinder.

9. The main bolt installation tool for a nuclear power main pump according to claim 4, characterized in that: The outer side wall of the upper support plate is provided with a limiting groove, and the end of the crowbar can be limited in the limiting groove so as to rotate the limiting cylinder through the crowbar.

10. The main bolt installation tool for a nuclear power main pump according to claim 1, characterized in that: At least two support seats are installed on the mobile base.

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