Opening and closing device and opening and closing method of filter flange

Abstract

The present invention provides an opening and closing device and an opening and closing method for a filter flange. The device comprises: a displacement mechanism and a telescopic screwing mechanism. The displacement mechanism is used to support the filter flange, and comprises a first slewing bearing assembly. The telescopic screwing mechanism is arranged on the first slewing bearing assembly, and comprises a screwing assembly. The distance between the central axis of the screwing assembly and the central axis of the first slewing bearing assembly is equal to the distance between the central axis of the bolt on the filter flange and the central axis of the filter flange. When the first slewing bearing assembly rotates, it can drive the screwing assembly to rotate to correspond to a bolt on the filter flange. The screwing assembly can be telescopic to engage or disengage with the corresponding bolt on the filter flange, and it can also rotate circumferentially to loosen or tighten the bolt when it is engaged with the corresponding bolt. The device can replace manual nearby operation to complete the opening and closing of the radioactive filter flange installed in a deep pit.

Description

Technical Field

[0001] The invention specifically relates to an opening and closing device and an opening and closing method for a filter flange. Background Art

[0002] The liquids in the chemical and volume control systems, boron recovery systems, steam generator sewage systems, reactor refueling pools, and spent fuel pool cooling and treatment systems of nuclear power plants contain radioactive substances. The corresponding filters are installed in deep pits and shielding covers are set on the top to achieve the purpose of radiation protection. When replacing the filter element, it is necessary to loosen the fastening bolts of the filter flange, and then rotate the input shaft of the reduction gearbox installed on the filter body so that the filter flange fixed on the output shaft of the reduction gearbox is opened for subsequent replacement of the filter element.

[0003] The existing technical solution requires manual operation using a long rod tool to reach into the pit for operation, which poses a high radiation risk to the operators. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an opening and closing device for a filter flange that can replace manual operation to complete the opening and closing of a radioactive filter flange installed in a deep pit, and a corresponding method for opening and closing the filter flange using the device is also provided.

[0005] The technical solution adopted to solve the technical problem of the present invention is:

[0006] The present invention provides an opening and closing device for a filter flange, comprising: a displacement mechanism and a telescopic screwing mechanism.

[0007] The displacement mechanism is used to be supported on the filter flange, and comprises a first slewing bearing assembly,

[0008] The telescopic screwing mechanism is arranged on the first slewing bearing assembly, which includes a screwing assembly. The distance between the central axis of the screwing assembly and the central axis of the first slewing bearing assembly is equal to the distance between the central axis of the bolt on the filter flange and the central axis of the filter flange.

[0009] When the first slewing bearing assembly rotates, it can drive the screwing assembly to rotate until it corresponds to a bolt on the filter flange.

[0010] The screwing assembly can be extended and retracted to be engaged with or disconnected from the corresponding bolts on the filter flange, and can also be rotated circumferentially to loosen or tighten the bolts when it is engaged with the corresponding bolts.

[0011] Optionally, the telescopic screwing mechanism further comprises a housing, a telescopic driving mechanism and a rotating driving mechanism, wherein the housing is arranged on the first slewing bearing assembly.

[0012] The screwing assembly passes through the housing and includes a transmission rod, a slide rod and a sleeve. The upper portion of the slide rod is sleeved on the transmission rod and is slidably connected to the transmission rod. The sleeve cooperates with the bolts on the filter flange and is arranged at the lower end of the slide rod.

[0013] The telescopic drive mechanism is arranged on the housing and is connected to the slide rod for driving the slide rod to slide up and down relative to the drive rod, so that the sleeve is connected or disconnected with the corresponding bolts on the filter flange.

[0014] The rotary drive mechanism is arranged at the upper end of the shell and is transmission-connected to the upper end of the transmission rod. It is used to drive the transmission rod to rotate, so as to drive the slide rod and the sleeve to rotate, so as to loosen or tighten the bolt by the sleeve.

[0015] Optionally, the slide bar includes an intermediate bar, a buffer spring and a buffer bar, and the intermediate bar, the buffer spring and the buffer bar are coaxially arranged.

[0016] The upper part of the intermediate rod is sleeved on the transmission rod and slidably connected with the transmission rod, and the lower part is slidably connected with the upper part of the buffer rod. The sleeve is arranged at the lower end of the buffer rod.

[0017] The buffer spring is compressed between the intermediate rod and the buffer rod, and is used for providing downward pressure to the buffer rod when the sleeve tightens the bolt.

[0018] Optionally, the telescopic drive mechanism includes a rotary drive motor, a gear rack transmission mechanism and a transmission tube, wherein the transmission tube is sleeved on the slide bar and is rotationally connected to the slide bar, and the rack of the gear rack transmission mechanism is arranged on the outer wall of the transmission tube.

[0019] The rotary drive motor is arranged on the housing and is connected to the gear transmission of the gear rack transmission mechanism, and is used to drive the gear rack to operate, so as to drive the screwing component to move up and down.

[0020] Optionally, the displacement mechanism further comprises a first driving mechanism and a mounting plate, the mounting plate is provided with a first through hole for exposing a bolt on the filter flange, the first slewing bearing assembly comprises a first slewing bearing and a first cover plate, the fixing ring of the first slewing bearing is arranged on the mounting plate, the first cover plate is arranged on the movable ring of the first slewing bearing, the telescopic screwing mechanism is arranged on the first cover plate, the screwing assembly passes through the first cover plate,

[0021] The first driving mechanism is arranged on the mounting plate or the fixed ring of the first slewing bearing, and is drivingly connected with the movable ring of the first slewing bearing to drive the movable ring of the first slewing bearing to rotate relative to its fixed ring, so as to drive the telescopic screwing mechanism on the first cover plate to rotate.

[0022] Optionally, a diameter-changing mechanism is further included, which is arranged between the first cover plate and the telescopic screwing mechanism and is used to drive the telescopic rotation drive mechanism to move relative to the first cover plate to adjust the distance from the central axis of the screwing assembly to the central axis of the first slewing bearing assembly.

[0023] Optionally, the diameter-changing mechanism includes a second swivel bearing assembly, which is arranged between the first cover plate and the telescopic screwing mechanism. The second swivel bearing assembly, the first swivel bearing assembly and the telescopic screwing mechanism are arranged non-concentrically with each other. When the second swivel bearing assembly rotates, it can drive the telescopic screwing mechanism to move relative to the first swivel bearing assembly to adjust the distance from the central axis of the screwing assembly to the central axis of the first swivel bearing assembly.

[0024] Optionally, the diameter-changing mechanism further includes a second driving mechanism, the second slewing bearing assembly includes a second slewing bearing and a second cover plate, the fixed ring of the second slewing bearing is arranged on the first cover plate, the second cover plate is arranged on the movable ring of the second slewing bearing, the telescopic screwing mechanism is arranged on the second cover plate, and the screwing assembly passes through the second cover plate.

[0025] The second driving mechanism is arranged on the second cover plate, and is transmission-connected with the movable ring of the second slewing bearing, and is used for driving the movable ring of the second slewing bearing to rotate relative to its fixed ring, so as to drive the telescopic screwing mechanism on the second cover plate to rotate. The first cover plate is provided with a second through hole for the telescopic screwing mechanism to move.

[0026] Optionally, an extension plate extending toward the first through hole is provided on the fixing ring of the first cover plate or the second slewing bearing.

[0027] The second driving mechanism is a driving motor, an output shaft of which is coaxially arranged with the second slewing bearing and fixed with the extension plate, and a motor body of which is arranged on the second cover plate.

[0028] It also includes a positioning sensor, which is arranged on the displacement mechanism, and includes a first positioning module and a second positioning module. The first positioning module corresponds to the central axis of the first slewing bearing assembly, and the second positioning module corresponds to the screwing assembly. The geometric center of the filter flange surface is provided with a first sensing plate that senses the first positioning module, and the bolt surface on the filter flange is provided with a second sensing plate that senses the second positioning module.

[0029] The present invention also provides a method for opening and closing a filter flange using the above-mentioned opening and closing device, comprising:

[0030] S1: Open filters include:

[0031] S1.1: Lower the opening and closing device until the displacement mechanism is supported on the filter flange.

[0032] S1.2: The first slewing bearing assembly rotates, driving the screwing assembly to rotate until it corresponds to a bolt on the filter flange, the screwing assembly extends until it is engaged with the corresponding bolt on the filter flange, the screwing assembly rotates to loosen the bolt, and the screwing assembly shortens until it is disconnected from the bolt.

[0033] S1.3: Repeat step S1.2 until all bolts on the filter flange are loosened;

[0034] S2: Close filter flange including:

[0035] S2.1: Lower the opening and closing device until the displacement mechanism is supported on the filter flange.

[0036] S2.2: The first slewing bearing assembly rotates, driving the screwing assembly to rotate until it corresponds to a bolt on the filter flange, the screwing assembly extends until it is engaged with the corresponding bolt on the filter flange, the screwing assembly rotates to tighten the bolt, and the screwing assembly shortens until it is disconnected from the bolt.

[0037] S2.3: Repeat step S2.2 until all bolts on the filter flange are tightened.

[0038] In the present invention, the telescopic screwing mechanism can be shifted to the top of each fastening bolt of the filter flange by the rotation of the displacement mechanism; the filter flange in the deep pit can be reached by the extension of the telescopic screwing mechanism, and the fastening bolts can be screwed. The device can replace manual operation nearby to complete the opening and closing of the radioactive filter flange installed in the deep pit. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A schematic diagram of the structure of the filter flange opening and closing device provided in Example 1 of the present invention;

[0040] Figure 2 A schematic structural diagram of the filter flange opening and closing device provided in Example 1 of the present invention from another perspective;

[0041] Figure 3 It is a three-dimensional structural schematic diagram of the telescopic screwing mechanism;

[0042] Figure 4 It is a schematic diagram of the longitudinal section structure of the telescopic screwing mechanism;

[0043] Figure 5 for Figure 4 A partial enlarged view of the upper part;

[0044] Figure 6 for Figure 4 A partial enlarged view of the lower part;

[0045] Figure 7It is a half-section structural schematic diagram of the displacement mechanism;

[0046] Figure 8 It is a schematic diagram of the half-section structure of the diameter-changing mechanism;

[0047] Fig. 9 It is a schematic diagram of the installation structure of the second driving mechanism. DETAILED DESCRIPTION

[0048] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of the present invention.

[0049] In the description of the present invention, it should be noted that the directions or positional relationships indicated by “upper” and the like are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience and simplification of the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0050] In the description of the present invention, the terms “first” and “second” are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0051] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connect", "set", "install", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] The present invention provides an opening and closing device for a filter flange, comprising: a displacement mechanism and a telescopic screwing mechanism.

[0053] The displacement mechanism is used to be supported on the filter flange, and comprises a first slewing bearing assembly,

[0054] The telescopic screwing mechanism is arranged on the first slewing bearing assembly, which includes a screwing assembly. The distance between the central axis of the screwing assembly and the central axis of the first slewing bearing assembly is equal to the distance between the central axis of the bolt on the filter flange and the central axis of the filter flange.

[0055] When the first slewing bearing assembly rotates, it can drive the screwing assembly to rotate until it corresponds to a bolt on the filter flange.

[0056] The screwing assembly can be extended and retracted to be engaged with or disconnected from the corresponding bolts on the filter flange, and can also be rotated circumferentially to loosen or tighten the bolts when it is engaged with the corresponding bolts.

[0057] The present invention also provides a method for opening and closing a filter flange using the above-mentioned opening and closing device, comprising:

[0058] S1: Open filters include:

[0059] S1.1: Lower the opening and closing device until the displacement mechanism is supported on the filter flange.

[0060] S1.2: The first slewing bearing assembly rotates, driving the screwing assembly to rotate until it corresponds to a bolt on the filter flange, the screwing assembly extends until it is engaged with the corresponding bolt on the filter flange, the screwing assembly rotates to loosen the bolt, and the screwing assembly shortens until it is disconnected from the bolt.

[0061] S1.3: Repeat step S1.2 until all bolts on the filter flange are loosened;

[0062] S2: Close filter flange including:

[0063] S2.1: Lower the opening and closing device until the displacement mechanism is supported on the filter flange.

[0064] S2.2: The first slewing bearing assembly rotates, driving the screwing assembly to rotate until it corresponds to a bolt on the filter flange, the screwing assembly extends until it is engaged with the corresponding bolt on the filter flange, the screwing assembly rotates to tighten the bolt, and the screwing assembly shortens until it is disconnected from the bolt.

[0065] S2.3: Repeat step S2.2 until all bolts on the filter flange are tightened.

[0066] Embodiment 1:

[0067] like Figure 1 and Figure 2 As shown, this embodiment provides an opening and closing device for a filter flange, comprising: a displacement mechanism 1 and a telescopic screwing mechanism 3,

[0068] The displacement mechanism 1 is used to be supported on the filter flange, and comprises a first slewing bearing assembly,

[0069] The telescopic screwing mechanism 3 is arranged on the first slewing bearing assembly, which includes a screwing assembly. The distance between the central axis of the screwing assembly and the central axis of the first slewing bearing assembly is equal to the distance between the central axis of the bolt on the filter flange and the central axis of the filter flange.

[0070] When the first slewing bearing assembly rotates, it can drive the screwing assembly to rotate until it corresponds to a bolt on the filter flange.

[0071] The screwing assembly can be extended and retracted to be engaged with or disconnected from the corresponding bolts on the filter flange, and can also be rotated circumferentially to loosen or tighten the bolts when it is engaged with the corresponding bolts.

[0072] Thus, by rotating the displacement mechanism 1, the telescopic screwing mechanism 3 can be displaced to the top of each fastening bolt of the filter flange; by extending the telescopic screwing mechanism 3, the filter flange in the deep pit can be reached and the fastening bolts can be screwed. The device can replace manual operation nearby to complete the opening and closing of the radioactive filter flange installed in the deep pit.

[0073] In this embodiment,

[0074] like Figure 3-Figure 6 As shown, the telescopic screwing mechanism 3 also includes a housing, a telescopic driving mechanism and a rotating driving mechanism 37. The housing is arranged on the first slewing bearing assembly.

[0075] The screwing assembly passes through the housing, and includes a transmission rod 38, a slide rod and a sleeve 317. The upper portion of the slide rod is sleeved on the transmission rod 38 and is slidably connected to the transmission rod 38. The sleeve 317 cooperates with the bolts on the filter flange and is arranged at the lower end of the slide rod.

[0076] The telescopic drive mechanism is arranged on the housing and is connected to the slide rod for driving the slide rod to slide up and down relative to the drive rod 38, so that the sleeve 317 is connected or disconnected with the corresponding bolts on the filter flange.

[0077] The rotary drive mechanism 37 is disposed at the upper end of the shell and is in transmission connection with the upper end of the transmission rod 38 , and is used to drive the transmission rod 38 to rotate, thereby driving the slide rod and the sleeve 317 to rotate, so that the sleeve 317 can loosen or tighten the bolt.

[0078] Therefore, the sleeve 317 can move up and down under the drive of the telescopic drive mechanism and can rotate circumferentially under the drive of the rotary drive mechanism 37. It is sleeved on the fastening bolt head of the filter flange to complete the loosening and tightening of the bolt.

[0079] In this embodiment, the slide bar includes an intermediate bar 39, a buffer spring 315 and a buffer bar 313, and the intermediate bar 39, the buffer spring 315 and the buffer bar 313 are coaxially arranged.

[0080] The upper part of the intermediate rod 39 is sleeved on the transmission rod 38 and is slidably connected to the transmission rod 38, and the lower part thereof is slidably connected to the upper part of the buffer rod 313. The sleeve 317 is disposed at the lower end of the buffer rod 313.

[0081] The buffer spring 315 is compressed between the intermediate rod 39 and the buffer rod 313 to provide downward pressure to the buffer rod 313 when the sleeve 317 tightens the bolt.

[0082] Specifically, a first blind hole matching with the transmission rod 38 is formed at the top of the intermediate rod 39, and the intermediate rod 39 is slidably connected with the transmission rod 38 through the first blind hole. The middle part of the lower end of the intermediate rod 39 extends downward to form an extension rod 391, and a second blind hole matching with the extension rod 391 is formed at the top of the buffer rod 313, and the buffer rod 313 is slidably connected with the extension rod 391 of the intermediate rod 39 through the second blind hole. The buffer spring 315 is sleeved on the extension rod 391 and compressed between the bottom end surface of the intermediate rod 39 and the top end surface of the buffer rod 313. It is used to maintain the downward pressure on the buffer rod 313 and absorb the displacement of the buffer rod 313 when it is pushed up.

[0083] The sleeve 317 is installed at the bottom of the buffer rod 313 and forms a plug-in structure with the buffer rod 313, so that the sleeve 317 rotates synchronously with the rotation of the buffer rod 313, and the two are connected by a pin 316.

[0084] In this embodiment,

[0085] The telescopic driving mechanism includes a rotary driving motor 34, a gear rack transmission mechanism and a transmission tube 33. The transmission tube 33 is sleeved on the slide rod and is rotationally connected to the slide rod. The rack of the gear rack transmission mechanism is arranged on the outer wall of the transmission tube 33.

[0086] The rotary drive motor 34 is disposed on the housing and is connected to the gear 35 of the gear rack transmission mechanism for driving the gear rack to operate, so as to drive the screwing assembly to move up and down.

[0087] In other embodiments, the telescopic drive mechanism may be replaced by a linear drive mechanism such as a pneumatic push rod or an electric push rod.

[0088] Specifically, the shell includes a gear rack housing 31 and a sleeve bracket 36. The gear rack housing 31 is fixed on the first cover plate 13 of the first slewing bearing assembly. Rack sliding bearings 32 are installed at both upper and lower ends of the gear rack housing 31. A transmission tube 33 with a rack on the outer wall passes through the rack sliding bearing 32 and can slide up and down.

[0089] The sleeve bracket 36 is fixed to the top of the gear rack housing 31, and the rotation drive mechanism 37 is fixed to the top of the sleeve bracket 36. In this embodiment, the rotation drive mechanism 37 is a motor, and its output shaft extends into the sleeve bracket 36 and is fixedly connected to the transmission rod 38.

[0090] The rotary drive motor 34 is fixed on the gear rack housing 31; its output shaft extends into the gear rack housing 31 and is connected to the gear transmission of the gear rack transmission mechanism therein. The gear meshes with the rack on the outer wall of the transmission tube 33 for transmission.

[0091] The intermediate rod 39 and the transmission rod 38 form a plug-in structure. When the intermediate rod 39 moves with the telescopic rack, the two remain connected, and the intermediate rod 39 rotates synchronously with the rotation of the transmission rod 38; the intermediate rod 39 is installed in the transmission tube 33, and is connected to the top of the transmission tube 33 through a rolling bearing 310; the rolling bearing 310 is installed in the transmission tube 33, and its outer ring is fixed to the top of the transmission tube 33 by the rack upper end cover 311, and its inner ring is fixed to the intermediate rod 39 by the bearing retaining ring 312; the buffer rod 313 and the intermediate rod 39 form a plug-in structure. The buffer rod 313 has a sleeve structure, and the two remain connected when the buffer rod 313 moves with the sleeve 317, and the buffer rod 313 rotates synchronously with the rotation of the intermediate rod 39; the buffer rod 313 is installed in the transmission tube 33, and is connected to the bottom of the transmission tube 33 through the buffer rod sliding bearing 314; the top of the buffer rod 313 has a shoulder larger than the inner diameter of the buffer rod sliding bearing 314 to prevent the buffer rod 313 from falling out when moving downward; the buffer rod sliding bearing 314 is installed in the transmission tube 33 and fixed to the bottom of the transmission tube 33 by the rack lower end cover 318.

[0092] In this embodiment,

[0093] like Figure 7 As shown, the displacement mechanism 1 further includes a first driving mechanism, a mounting plate 12 and a displacement mechanism housing 16. The mounting plate 12 is provided with a first through hole 121 exposing the bolts on the filter flange. The first slewing bearing assembly includes a first slewing bearing 11 and a first cover plate 13. Specifically, the first slewing bearing 11 is an external gear type, and its inner ring is arranged on the mounting plate 12. The first cover plate 13 is arranged on the outer ring of the first slewing bearing 11. The telescopic screwing mechanism 3 is arranged on the first cover plate 13. The screwing assembly passes through the first cover plate 13.

[0094] The displacement mechanism housing 16 is disposed on one side of the mounting plate 12 and is fixedly connected thereto. The first driving mechanism includes a displacement driving motor 14 and a displacement driving gear 15.

[0095] The shifting drive motor 14 is disposed on the mounting plate 12 or the shifting mechanism housing 16. Figure 7 In the example, it is fixed on the shifting mechanism housing 16, and its output shaft extends into the shifting mechanism housing 16 and is drivingly connected with the shifting drive gear 15 therein.

[0096] The shift drive gear 15 is meshingly connected with the outer ring of the first slewing support 11 , and the shift drive motor 14 drives the outer ring of the first slewing support 11 to rotate relative to its inner ring through the shift drive gear 15 , so as to drive the telescopic screwing mechanism 3 on the first cover plate 13 to rotate.

[0097] In this embodiment,

[0098] It also includes a diameter reducing mechanism 2, which is arranged between the first cover plate 13 and the telescopic screwing mechanism 3, and is used to drive the telescopic rotation driving mechanism 37 to move relative to the first cover plate 13 to adjust the distance from the central axis of the screwing assembly to the central axis of the first slewing bearing assembly.

[0099] Through the movement of the diameter reducing mechanism, the position of the screwing assembly relative to the central axis of the first slewing bearing assembly can be adjusted to adapt to different distribution diameters of the filter flange fastening bolts.

[0100] In this embodiment,

[0101] like Figure 8 As shown, the diameter-changing mechanism 2 includes a second swivel bearing assembly, which is arranged between the first cover plate 13 and the telescopic screwing mechanism 3. The second swivel bearing assembly, the first swivel bearing assembly and the telescopic screwing mechanism 3 are arranged non-concentrically with each other. When the second swivel bearing assembly rotates, it can drive the telescopic screwing mechanism 3 to move relative to the first swivel bearing assembly to adjust the distance from the central axis of the screwing assembly to the central axis of the first swivel bearing assembly.

[0102] In this embodiment,

[0103] The diameter-changing mechanism 2 further includes a second driving mechanism 23. The second slewing bearing assembly includes a second slewing bearing 21 and a second cover plate 22. The second slewing bearing 21 is a toothless type, and its inner ring is arranged on the first cover plate 13. The second cover plate 22 is arranged on the outer ring of the second slewing bearing 21. The telescopic screwing mechanism 3 is arranged on the second cover plate 22. The screwing assembly passes through the second cover plate 22.

[0104] The second driving mechanism 23 is disposed on the second cover plate 22, and is drivingly connected to the outer ring of the second slewing bearing 21, and is used to drive the outer ring of the second slewing bearing 21 to rotate relative to its inner ring, so as to drive the telescopic screwing mechanism 3 on the second cover plate 22 to rotate. The first cover plate 13 is provided with a second through hole 131 for the telescopic screwing mechanism 3 to move.

[0105] Specifically,

[0106] An extension plate 24 extending toward the first through hole 121 is provided on the fixing ring of the first cover plate 13 or the second slewing bearing 21. Fig. 9 As shown, the extension plate 24 of this embodiment is disposed on the first cover plate 13 .

[0107] The second driving mechanism 23 is a driving motor, an output shaft of which is coaxially arranged with the second slewing bearing 21 and fixed with the extension plate 24 , and a motor body of which is disposed on the second cover plate 22 .

[0108] That is, in this embodiment, the output shaft of the second driving mechanism 23 is fixed, and the motor body thereof rotates relative to the output shaft, thereby driving the second slewing bearing 21 to rotate.

[0109] In this embodiment, a positioning sensor 4 is also included. The positioning sensor 4 is arranged on the displacement mechanism 1, and includes a first positioning module and a second positioning module. The first positioning module corresponds to the central axis of the first slewing bearing assembly, and the second positioning module corresponds to the screwing assembly. The geometric center of the filter flange surface is provided with a first sensing plate that senses the first positioning module, and the bolt surface on the filter flange is provided with a second sensing plate that senses the second positioning module.

[0110] Therefore, the positioning sensor 4 can feedback the positioning deviation after the telescopic screwing diameter-changing and position-changing unit is in place and provide position adjustment parameters, while feedback the position of the filter flange fastening bolts.

[0111] Embodiment 2:

[0112] This embodiment provides a method for opening and closing a filter flange using the opening and closing device of embodiment 1, comprising:

[0113] S1: Open filters include:

[0114] S1.1: Lower the opening and closing device until the displacement mechanism 1 is supported on the filter flange.

[0115] S1.2: The first slewing bearing assembly rotates, driving the screwing assembly to rotate until it corresponds to a bolt on the filter flange, the screwing assembly extends until it is engaged with the corresponding bolt on the filter flange, the screwing assembly rotates to loosen the bolt, and the screwing assembly shortens until it is disconnected from the bolt.

[0116] S1.3: Repeat step S1.2 until all bolts on the filter flange are loosened;

[0117] S2: Close filter flange including:

[0118] S2.1: Lower the opening and closing device until the displacement mechanism 1 is supported on the filter flange.

[0119] S2.2: The first slewing bearing assembly rotates, driving the screwing assembly to rotate until it corresponds to a bolt on the filter flange, the screwing assembly extends until it is engaged with the corresponding bolt on the filter flange, the screwing assembly rotates to tighten the bolt, and the screwing assembly shortens until it is disconnected from the bolt.

[0120] S2.3: Repeat step S2.2 until all bolts on the filter flange are tightened.

[0121] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A filter flange opening and closing device, characterized in that: include: The displacement mechanism (1) and the telescopic screwing mechanism (3) The displacement mechanism (1) is used to be supported on the filter flange, and comprises a first slewing bearing assembly, The telescopic screwing mechanism (3) is arranged on the first slewing bearing assembly, and comprises a screwing assembly, wherein the distance between the central axis of the screwing assembly and the central axis of the first slewing bearing assembly is equal to the distance between the central axis of the bolt on the filter flange and the central axis of the filter flange. When the first slewing bearing assembly rotates, it can drive the screwing assembly to rotate until it corresponds to a bolt on the filter flange. The screwing assembly can be extended to be engaged with or disconnected from the corresponding bolts on the filter flange, and can also rotate circumferentially to loosen or tighten the bolts when it is engaged with the corresponding bolts; The telescopic screwing mechanism (3) further comprises a housing, a telescopic driving mechanism and a rotary driving mechanism (37), wherein the housing is arranged on the first slewing bearing assembly. The screwing assembly passes through the housing and comprises a transmission rod (38), a sliding rod and a sleeve (317). The upper portion of the sliding rod is sleeved on the transmission rod (38) and is slidably connected to the transmission rod (38). The sleeve (317) cooperates with a bolt on the filter flange and is arranged at the lower end of the sliding rod. The telescopic drive mechanism is disposed on the housing and is transmission-connected to the slide rod, and is used to drive the slide rod to slide up and down relative to the transmission rod (38), so that the sleeve (317) is engaged with or disengaged from the corresponding bolts on the filter flange. The rotary drive mechanism (37) is disposed at the upper end of the housing and is in driving connection with the upper end of the transmission rod (38), and is used to drive the transmission rod (38) to rotate, thereby driving the slide rod and the sleeve (317) to rotate, so that the sleeve (317) loosens or tightens the bolt; The displacement mechanism (1) further comprises a first driving mechanism and a mounting plate (12); the mounting plate (12) is provided with a first through hole (121) through which bolts on the filter flange are exposed; the first slewing bearing assembly comprises a first slewing bearing (11) and a first cover plate (13); the fixing ring of the first slewing bearing (11) is arranged on the mounting plate (12); the first cover plate (13) is arranged on the movable ring of the first slewing bearing (11); the telescopic screwing mechanism (3) is arranged on the first cover plate (13); the screwing assembly passes through the first cover plate (13); The first driving mechanism is disposed on the mounting plate (12) or the fixed ring of the first slewing bearing (11), and is drivingly connected to the movable ring of the first slewing bearing (11) for driving the movable ring of the first slewing bearing (11) to rotate relative to its fixed ring, thereby driving the telescopic screwing mechanism (3) on the first cover plate (13) to rotate.

2. The filter flange opening and closing device according to claim 1, characterized in that: The sliding rod comprises an intermediate rod (39), a buffer spring (315) and a buffer rod (313), wherein the intermediate rod (39), the buffer spring (315) and the buffer rod (313) are coaxially arranged. The upper portion of the intermediate rod (39) is sleeved on the transmission rod (38) and is slidably connected to the transmission rod (38), and the lower portion is slidably connected to the upper portion of the buffer rod (313). The sleeve (317) is disposed at the lower end of the buffer rod (313). The buffer spring (315) is compressed between the intermediate rod (39) and the buffer rod (313) and is used to provide downward pressure to the buffer rod (313) when the sleeve (317) tightens the bolt.

3. The filter flange opening and closing device according to claim 1, characterized in that: The telescopic drive mechanism comprises a rotary drive motor (34), a gear rack transmission mechanism and a transmission tube (33); the transmission tube (33) is sleeved on the slide rod and is rotationally connected to the slide rod; the rack of the gear rack transmission mechanism is arranged on the outer wall of the transmission tube (33); The rotary drive motor (34) is arranged on the housing and is transmission-connected to the gear (35) of the gear rack transmission mechanism, and is used to drive the gear rack to operate, thereby driving the screwing assembly to move up and down.

4. The filter flange opening and closing device according to any one of claims 1 to 3, characterized in that: It also comprises a diameter-changing mechanism (2), the diameter-changing mechanism (2) being arranged between the first cover plate (13) and the telescopic screwing mechanism (3) and being used for driving the telescopic rotary drive mechanism (37) to move relative to the first cover plate (13) so as to adjust the distance between the central axis of the screwing assembly and the central axis of the first slewing bearing assembly.

5. The filter flange opening and closing device according to claim 4, characterized in that: The diameter-changing mechanism (2) comprises a second slewing bearing assembly, the second slewing bearing assembly being arranged between the first cover plate (13) and the telescopic screwing mechanism (3), the second slewing bearing assembly, the first slewing bearing assembly and the telescopic screwing mechanism (3) being arranged non-concentrically with each other, and when the second slewing bearing assembly rotates, it can drive the telescopic screwing mechanism (3) to move relative to the first slewing bearing assembly, so as to adjust the distance between the central axis of the screwing assembly and the central axis of the first slewing bearing assembly.

6. The filter flange opening and closing device according to claim 5, characterized in that: The diameter-changing mechanism (2) further comprises a second driving mechanism (23); the second slewing bearing assembly comprises a second slewing bearing (21) and a second cover plate (22); the fixed ring of the second slewing bearing (21) is arranged on the first cover plate (13); the second cover plate (22) is arranged on the movable ring of the second slewing bearing (21); the telescopic screwing mechanism (3) is arranged on the second cover plate (22); the screwing assembly passes through the second cover plate (22); The second driving mechanism (23) is disposed on the second cover plate (22) and is drivingly connected to the movable ring of the second slewing bearing (21) for driving the movable ring of the second slewing bearing (21) to rotate relative to its fixed ring, thereby driving the telescopic screwing mechanism (3) on the second cover plate (22) to rotate. The first cover plate (13) is provided with a second through hole (131) for the telescopic screwing mechanism (3) to move.

7. The filter flange opening and closing device according to claim 6, characterized in that: An extension plate (24) extending toward the first through hole (121) is provided on the fixing ring of the first cover plate (13) or the second slewing bearing (21). The second driving mechanism (23) is a driving motor, the output shaft of which is coaxially arranged with the second slewing bearing (21) and fixed to the extension plate (24), and the motor body of which is arranged on the second cover plate (22).

8. The filter flange opening and closing device according to any one of claims 1 to 3, characterized in that: It also includes a positioning sensor (4), which is arranged on the displacement mechanism (1), and includes a first positioning module and a second positioning module, the first positioning module corresponds to the central axis of the first slewing bearing assembly, and the second positioning module corresponds to the screwing assembly, the geometric center of the filter flange surface is provided with a first sensing plate that senses the first positioning module, and the bolt surface on the filter flange is provided with a second sensing plate that senses the second positioning module.

9. A method for opening and closing a filter flange using the opening and closing device according to any one of claims 1 to 8, comprising: S1: Open filters include: S1.1: Lower the opening and closing device until the displacement mechanism (1) is supported on the filter flange. S1.2: The first slewing bearing assembly rotates, driving the screwing assembly to rotate until it corresponds to a bolt on the filter flange, the screwing assembly extends until it is engaged with the corresponding bolt on the filter flange, the screwing assembly rotates to loosen the bolt, and the screwing assembly shortens until it is disconnected from the bolt. S1.3: Repeat step S1.2 until all bolts on the filter flange are loosened; S2: Close filter flange including: S2.1: Lower the opening and closing device until the positioner (1) is supported on the filter flange. S2.2: The first slewing bearing assembly rotates, driving the screwing assembly to rotate until it corresponds to a bolt on the filter flange, the screwing assembly extends until it is engaged with the corresponding bolt on the filter flange, the screwing assembly rotates to tighten the bolt, and the screwing assembly shortens until it is disconnected from the bolt. S2.3: Repeat step S2.2 until all bolts on the filter flange are tightened.

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