Rotary limiting seat for mounting main bolt of nuclear power main pump

Abstract

The utility model provides a rotary limiting seat for mounting a main bolt of a nuclear power main pump, and relates to the technical field of mounting of the main bolt of the nuclear power main pump. The rotation limiting seat for nuclear power main pump main bolt installation comprises a rotation connecting piece, a damping mechanism and a limiting cylinder, the rotation connecting piece is installed on a jacking driving mechanism of a nuclear power main pump main bolt installation tool, and the limiting cylinder is installed on the rotation connecting piece through the damping mechanism. And the lower end part of the nuclear power main pump main bolt can be vertically limited and placed in the limiting cylinder. Based on the technical scheme of the utility model, the rotary limiting seat for mounting the main bolt of the nuclear power main pump can limit and vertically place the main bolt of the nuclear power main pump, and can drive the main bolt of the nuclear power main pump to rotate so as to screw the main bolt of the nuclear power main pump into a thread on a main pump housing.

Description

Technical Field

[0001] The utility model relates to the technical field of installing main bolts of a nuclear power main pump, in particular to a rotary limit seat used for installing main bolts of a nuclear power main pump. Background Art

[0002] The domestically produced CAP1400 main pump is installed in a small compartment. After the main pump is lifted into place, it is suspended and installed below the main pump housing by main bolts. Due to the large size of the main pump and the small size of the compartment, the gap in some areas is only 50mm. The main bolts are also long and heavy, and can only be passed from below through the main pump flange and screwed into the threads on the main pump housing. Therefore, it is necessary to design a rotary limit seat for the installation of the main bolts of the nuclear power main pump, which can limit the vertical placement of the main bolts of the nuclear power main pump and can drive the main bolts of the nuclear power main pump to rotate so that the main bolts of the nuclear power main pump are screwed into the threads on the main pump housing. Utility Model Content

[0003] In response to the above-mentioned problems in the prior art, the present application proposes a rotary limit seat for the installation of the main bolts of the nuclear power main pump, which can limit the vertical placement of the main bolts of the nuclear power main pump and can drive the main bolts of the nuclear power main pump to rotate so that the main bolts of the nuclear power main pump can be screwed into the threads on the main pump cover.

[0004] The utility model provides a rotary limit seat for installing the main bolts of the nuclear power main pump. The rotary limit seat for installing the main bolts of the nuclear power main pump includes a rotary connecting piece, a shock absorbing mechanism and a limit cylinder. The rotary connecting piece is installed on the jacking drive mechanism of the main bolt installation tool of the nuclear power main pump. The limit cylinder is installed on the rotary connecting piece through the shock absorbing mechanism. The lower end of the main bolt of the nuclear power main pump can be vertically limited and placed in the limit cylinder.

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

[0006] The above-mentioned rotary limit seat for installing the main bolts of the nuclear power main pump, 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.

[0007] The above-mentioned rotary limit seat for installing the main bolts of the nuclear power main pump, 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, and 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 the two ends of the shock-absorbing spring are respectively in contact with the lower surface of the upper support plate and the upper surface of the lower support plate.

[0008] The above-mentioned rotary limit seat for installing the main bolts of the nuclear power main pump 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.

[0009] The above-mentioned rotary limit seat for installing the main bolts of the nuclear power main pump further has the following features: the vertical guide groove is located at the center of the lower support plate, and multiple groups of shock-absorbing components are evenly spaced and arranged around the outer periphery of the vertical guide groove.

[0010] The above-mentioned slewing limit seat for installing the main bolts of the nuclear power main pump, further, the slewing connecting part includes a slewing support cylinder, a limit cover plate and a slewing bearing, the lower support plate is provided with a slewing shaft, the limit cover plate is provided with a limit hole, the slewing shaft passes through the limit hole, the slewing bearing is sleeved on the slewing shaft, the slewing bearing is limited in the slewing support cylinder, the limit cover plate is detachably installed on the upper end of the slewing support cylinder, and the limit cover plate is used to limit the slewing bearing in the slewing support cylinder.

[0011] The above-mentioned rotary limit seat for installing the main bolts of the nuclear power main pump further has a limit groove on the outer wall of the upper support plate, and the end of the crowbar can be limited in the limit groove to rotate the limit cylinder through the crowbar.

[0012] 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.

[0013] The utility model provides a rotary limit seat for installing the main bolt of a nuclear power main pump. Compared with the prior art, it has at least the following beneficial effects: when the nuclear power main pump needs to be screwed into the casing through the main bolt, the nuclear power main pump main bolt is hoisted, and the lower end of the nuclear power main pump main bolt is vertically limited and placed in the limit cylinder. When the upper end of the nuclear power main pump main bolt is lifted to the main pump casing thread and screwed into the thread, a shock-absorbing mechanism is provided on the rotary limit seat to avoid excessive force causing damage to the main bolt or the main pump casing thread. The operator uses a tool such as a crowbar to rotate the rotary limit seat, and at the same time, the lifting drive mechanism applies an upward force to the rotary limit seat to screw the nuclear power main pump main bolt into the main pump casing. The rotary limit seat for installing the main bolt of the nuclear power main pump can limit the vertical placement of the nuclear power main pump main bolt and can drive the nuclear power main pump main bolt to rotate so that the nuclear power main pump main bolt is screwed into the thread on the main pump casing.

[0014] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0016] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings, wherein:

[0017] 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.

[0018] Figure 2 Shows Figure 1 Enlarged view of area A in the middle;

[0019] Figure 3 A schematic structural 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.

[0020] In the drawings, like reference numerals are used for like parts, but the drawings are not necessarily true to scale.

[0021] Description of reference numerals:

[0022] 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 connector, 155-shock absorber mechanism, 156-limiting cylinder, 157-upper support plate, 158-lower support plate, 159-guide column, 160-shock absorber 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

[0023] The following describes embodiments of the present invention in detail. Examples of the embodiments 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 intended only to explain the present invention and are not to be construed as limiting the present invention.

[0024] 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 to 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 device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0026] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0027] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0028] The present invention will be further described below with reference to the accompanying drawings.

[0029] An embodiment of the present utility model provides a rotary limit seat 153 for installing the main bolts of the nuclear power main pump, which can limit the vertical placement of the main bolts of the nuclear power main pump and can drive the main bolts of the nuclear power main pump to rotate so that the main bolts of the nuclear power main pump are screwed into the threads on the main pump cover.

[0030] See also Figure 1 The embodiment of the present invention provides a nuclear power main pump main bolt installation tool 100, which includes a mobile base 110, a support base 120 installed on the mobile base 110, a first support frame 130 installed on the support base 120, a lifting drive mechanism 131 installed on the first support frame 130, a second support frame 140 installed on the lifting drive mechanism 131, a rotating mechanism 141 installed on the second support frame 140, and a rotating mechanism 141 installed on the rotating mechanism 141. The third support frame 150 can be horizontally rotated through the rotating mechanism 141. The third support frame 150 is equipped with a clamping limit mechanism 151 and a jacking drive mechanism 152. The jacking drive mechanism 152 is equipped with a rotary limit seat 153. The rotary limit seat 153 can be horizontally rotated relative to the jacking drive mechanism 152. The main bolt of the nuclear power main pump can vertically pass 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.

[0031] When the nuclear power main pump needs to be screwed into the cover through the main bolt, the main bolt of the nuclear power main pump is first hoisted vertically 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. 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. After that, 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 is close to the thread of the main pump cover. 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 cover; 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 rotation 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 away from the original position to avoid the influence of the main pump cover above, thereby realizing the lifting operation from above.

[0032] The embodiment of the present invention provides a nuclear power main pump main bolt installation tool 100, further, please refer to Figure 1The first support frame 130 is horizontally slidably mounted on the support base 120, and the support base 120 is mounted on the mobile base 110 through a slewing bearing 121. After the mobile base 110 moves to the lower side of the nuclear power main pump, the support base 120 can be rotated relative to the mobile base 110 through the slewing bearing 121 to enable all main bolts to be installed. The support base 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 mounted on the support base 120. When passing the main pump protrusion position, the support frame can move radially outward relative to the support base 120. When passing the column position, the support frame can move radially inward relative to the support base 120 to avoid interference.

[0033] The embodiment of the present invention provides a nuclear power main pump main bolt installation tool 100, further, please combine Figure 2 and Figure 3 The rotary limit seat 153 includes a rotary connector 154, a shock absorbing mechanism 155, and a limit cylinder 156. The rotary connector 154 is mounted on the lifting drive mechanism 152, and the limit cylinder 156 is mounted on the rotary connector 154 via the shock absorbing mechanism 155. When the upper end of the main bolt is lifted to the main pump housing thread and screwed into the thread, the shock absorbing mechanism 155 is provided below the main bolt to prevent damage to the main bolt or the main pump housing thread caused by excessive force.

[0034] 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 mounted on the upper support plate 157, and the lower support plate 158 is mounted on the rotary connector 154. Multiple shock absorbing assemblies are mounted between the upper support plate 157 and the lower support plate 158. The shock absorbing assemblies include a guide post 159 and a shock absorbing spring 160. The guide post 159 is vertically mounted on the lower support plate 158. The upper support plate 157 is provided with a guide hole 161. The upper end of the guide post 159 is limited in the guide hole 161, and the upper support plate 157 can move vertically relative to the guide post 159. The shock absorbing spring 160 is sleeved on the guide post 159, and the two ends of the shock absorbing spring 160 respectively abut against 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 set on the rotary limit seat 153. Under the action of the shock-absorbing spring 160, the upper support plate 157 will move vertically elastically a certain distance relative to the lower support plate 158, which can avoid excessive force causing damage to the main bolt or the thread of the main pump cover.

[0035] The embodiment of the present invention provides a nuclear power main pump main bolt installation tool 100, further, please combine Figure 2 and Figure 3 The lower support plate 158 is provided with a vertical guide groove 162, and the upper support plate 157 is provided with a vertical guide protrusion 163. The vertical guide protrusion 163 can be constrained 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 vertical movement of the upper support plate 157 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 multiple groups of shock absorbing assemblies are evenly spaced and arranged around the periphery of the vertical guide groove 162. The rotary connector 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. The limiting cover plate 165 defines a limiting hole through which the rotary shaft 167 passes. The rotary bearing 166 is sleeved on the rotating shaft 167 and 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 and is used to limit the rotary bearing 166 in the rotary support cylinder 164. The outer wall of the upper support plate 157 defines a limiting groove 168. The end of the pry bar can be limited in the limiting groove 168 so that the limiting cylinder 156 can be rotated by the pry bar.

[0036] In this embodiment, at least two support bases 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 bases 120 can install the main bolts of the nuclear power main pump at the same time, thereby improving the efficiency of the main bolt installation of the nuclear power main pump.

[0037] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" 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 can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0038] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It should be understood that many modifications may be made to the illustrative 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 ways other than those described in the original claims. It should also be understood that features described in conjunction with individual embodiments may be employed in conjunction with other described embodiments.

Claims

1. A rotary limit seat for installing the main bolts of a nuclear power main pump, characterized in that: The rotary limit seat for installing the main bolts of the nuclear power main pump includes a rotary connecting piece, a shock absorbing mechanism and a limit cylinder. The rotary connecting piece is installed on the jacking drive mechanism of the nuclear power main pump main bolt installation tool. The limit cylinder is installed on the rotary connecting piece through the shock absorbing mechanism. The lower end of the main bolt of the nuclear power main pump can be vertically limited and placed in the limit cylinder.

2. The rotary limit seat for installing the main bolt of the nuclear power main pump according to claim 1 is characterized in that: The shock absorbing mechanism includes an upper support plate and a lower support plate. The limiting cylinder is installed on the upper support plate. The lower support plate is installed on the rotary connecting member. Multiple groups of shock absorbing components are installed between the upper support plate and the lower support plate.

3. The rotary limit seat for installing the main bolt of the nuclear power main pump according to claim 2 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 the two ends of the shock absorbing spring are respectively in contact with the lower surface of the upper support plate and the upper surface of the lower support plate.

4. The rotary limit seat for installing the main bolt of the nuclear power main pump according to claim 2 is 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.

5. The rotary limit seat for installing the main bolt of the nuclear power main pump according to claim 4 is 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.

6. The rotary limit seat for installing the main bolt of the nuclear power main pump according to claim 2 is characterized in that: The rotary connecting member includes a rotary support cylinder, a limiting cover plate and a rotary bearing. The lower support plate is provided with a rotary shaft. A limiting hole is provided on the limiting cover plate. The rotary shaft passes through the limiting hole. The rotary bearing is sleeved on the rotary shaft. The rotary bearing is limited in the rotary support cylinder. The limiting cover plate is detachably installed on the upper end of the rotary support cylinder. The limiting cover plate is used to limit the rotary bearing in the rotary support cylinder.

7. The rotary limit seat for installing the main bolt of the nuclear power main pump according to claim 2 is 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 that the limiting cylinder can be rotated by the crowbar.

Images