CN115430994A - Integral assembling process for large mechanical synchronous cylindrical valve - Google Patents
Integral assembling process for large mechanical synchronous cylindrical valve Download PDFInfo
- Publication number
- CN115430994A CN115430994A CN202210832218.8A CN202210832218A CN115430994A CN 115430994 A CN115430994 A CN 115430994A CN 202210832218 A CN202210832218 A CN 202210832218A CN 115430994 A CN115430994 A CN 115430994A
- Authority
- CN
- China
- Prior art keywords
- cylindrical valve
- welding
- assembling
- synchronous
- top cover
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 50
- 230000008569 process Effects 0.000 title claims abstract description 46
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 44
- 238000003466 welding Methods 0.000 claims abstract description 65
- 230000007246 mechanism Effects 0.000 claims abstract description 18
- 238000007789 sealing Methods 0.000 claims abstract description 10
- 238000010276 construction Methods 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000011282 treatment Methods 0.000 claims description 3
- 238000007688 edging Methods 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 14
- 238000005498 polishing Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 210000003811 finger Anatomy 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000011418 maintenance treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 210000003813 thumb Anatomy 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/001—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass valves or valve housings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention provides an integral assembly process of a large mechanical synchronous cylindrical valve. The integral assembling process of the large mechanical synchronous cylindrical valve comprises the following steps: s1, assembling a cylindrical valve; s2, welding the cylindrical valve; s3, assembling the cylindrical valve and the top cover; s4, installing a cylindrical valve power connector; and S5, installing a synchronous mechanism. The integral assembly process of the large mechanical synchronous cylindrical valve provided by the invention finally realizes the simple operation and high efficiency of the integral assembly of the cylindrical valve, effectively avoids the deformation of the cylindrical valve and shortens the installation period of the water distributor; when the cylindrical valve, the top cover and the servomotor are assembled in an installation room, the sealing device is synchronously installed, the control of the cylinder valve group, the installation quality and the progress is facilitated, and the method is suitable for assembling and welding the large mechanical synchronous cylindrical valve in a hydraulic power plant and integrally assembling the cylindrical valve with the top cover.
Description
Technical Field
The invention relates to the technical field of electromechanical installation, in particular to an integral assembly process of a large mechanical synchronous cylindrical valve.
Background
The cylindrical valve is a novel water inlet valve of the water turbine, is a closing valve capable of being shut down emergently, is arranged between the fixed guide vane and the movable guide vane of the water turbine, falls on the bottom ring when being closed, cuts off water flow and forms sealing with the top cover and the bottom ring, and particularly protects a water guide mechanism from clearance cavitation and silt abrasion when being shut down for a multi-silt power station. When the valve is opened, the valve body is positioned in a cavity chamber between the water turbine seat ring and the top cover, and the bottom edge of the valve body is flush with the wear-resistant plate of the top cover, so that the flow state of water flow is not interfered. When the unit is generating a runaway, the movable water closes the barrel valve to protect the unit from damage. The cylindrical valve has the advantages of compact structure and light weight, adopts the straight cylinder servomotor to operate, and has wide popularization prospect in the future hydropower construction.
The cylindrical valve assembly consists of four parts, namely a guide bar (welded on a fixed guide vane), a cylindrical valve body, a servomotor and a mechanical synchronization mechanism. The design clearance between the valve body and the guide strip is 0.8-1.2mm.
The valve body is arranged between the movable guide vane and the fixed guide vane, and the upper seal of the cylindrical valve is arranged on the top cover together with a compression ring by adopting a rubber plate with a flange; the lower seal is arranged on the bottom ring by adopting a pressing plate and rubber strip structure.
The cylindrical valve uses 6 relays uniformly distributed on the top cover of the water turbine as a lifting operation mechanism for the integral action of the cylindrical valve, the diameter phi of a single relay is 400mm, the stroke is 1525mm, the weight is 3.82t, the height is 3632mm, the rated working oil pressure of the relay is 6.0MPa, and the synchronization of the 6 relays is realized by a mechanical device mechanism. If the verticality of the lifting rod of the force receiver cannot meet the related technical requirements during installation, the cylinder valve can generate out-of-synchronization relay and issue a card when acting, the safe operation of a unit is seriously influenced, and the verticality installation quality control of the lifting rod of the relay is an important guarantee for realizing the synchronous action of the whole cylinder valve and the safe operation of the unit.
The valve body of the large mechanical synchronous cylindrical valve is thin-walled, large in size, poor in rigidity and easy to deform in the hoisting process, so that the process optimization of assembling, welding and integral assembling of the cylindrical valve and the top cover has very important practical significance.
Therefore, it is necessary to provide an integral assembly process for a large mechanical synchronous cylindrical valve to solve the above technical problems.
Disclosure of Invention
The invention provides an integral assembly process of a large mechanical synchronous cylindrical valve, which solves the problems of thin wall, large size, poor rigidity and easy deformation in the hoisting process of a large mechanical synchronous cylindrical valve body.
In order to solve the technical problem, the integral assembly process of the large mechanical synchronous cylindrical valve provided by the invention comprises the following steps:
s1, assembling a cylindrical valve, wherein a valve body of the cylindrical valve consists of two petals, and the cylindrical valve is assembled into a whole in a construction site and welded;
s2, welding the cylindrical valve by adopting a U-shaped groove and adopting a multi-layer welding process of simultaneous, same-direction, same-speed, edge embedding and multiple channels;
s3, assembling the cylindrical valve and the top cover, lifting the top cover to the upper side of the cylindrical valve within the range of 0.05mm/m, adjusting the position and the concentricity of the top cover and the cylindrical valve cylinder body, dropping the top cover after the position and the concentricity are basically consistent, and adjusting the concentricity of the top cover leakage-stopping ring and the processing surface of the toe end of the cylindrical valve to be within 0.10 mm;
s4, installing a cylindrical valve power connector, and connecting a cylinder body and a servomotor lifting rod by adopting an embedded bolt;
and S5, a synchronous mechanism is installed, the cylindrical valve adopts a mechanical synchronous mode, and in order to convert the linear motion of the servomotor into the rotary motion of the synchronous chain wheel, the synchronization of 6 servomotors is achieved.
Preferably, in the step S1, the cylinder body has an outer diameter of 9348mm, a height of 1630mm and a thickness of 180mm, and is made of ASTM a516 Gr70 steel plate, and stainless steel layers are welded on the upper and lower sealing areas.
Preferably, when the two-piece cylinder body is assembled into a whole, the two-piece cylinder body is leveled and then assembled, the roundness of the assembled cylinder body is not more than 1mm, the levelness of the upper plane and the lower plane is within 0.30mm, the assembling bolt is 18XM56X260, and the assembly torque is 5500N.m.
Preferably, the verticality of the guide strip of the cylinder body is measured after the guide strip is assembled into a whole and is within 0.05mm/m, if the verticality of the guide strip does not meet the requirement, the guide strip is not temporarily treated, and the grinding treatment is carried out after the cylinder body is welded.
Preferably, during welding in the step S2, the vertical face weld joint of the two cylindrical valves is preheated to 80 ℃ and is kept warm for 30 minutes, then welding is started, a step-by-step mode is adopted during welding, a phi 3.2 welding rod is selected for backing welding, a phi 4.0 welding rod is selected for vertical seam welding, welding is conducted inside and outside a combined seam in a symmetrical mode during welding, after each layer of welding is completed, stress relief needs to be hammered, and MT/PT flaw detection is qualified after each layer of welding.
Preferably, two dial indicators are erected at the proper position of the joint in the welding process to monitor the deformation in the welding process, and after the welding is finished, the roundness of the cylinder, the verticality of the guide strip and the planeness of the upper surface and the lower surface of the cylinder are rechecked.
Preferably, the connecting nut for bolt connection in step S4 is an M110X4 nut, and is placed in a window formed in the cylinder.
Preferably, a rolling screw pair is adopted in the step S5, the screw is limited by two one-way thrust ball bearings, and the radial displacement is guided and positioned by a copper sleeve fixed at the lower end of the upper cylinder cover.
Preferably, the shaft seal of the screw rod adopts an O-shaped seal ring, the screw rod can only do rotary motion, in order to enable the 6 operation relays to achieve synchronous motion and prevent the cylindrical valve from obliquely sending hair when vertically running up and down, the top ends of the 6 servomotor roller screw pairs are provided with double-layer chain wheels, and then the 6 chain wheels are connected in series by 6 circles of chains.
Preferably, the cartridge valve requires the use of a support apparatus during assembly, the support apparatus comprising:
the mounting rack is provided with an adjusting groove;
the support frames are embedded and installed on the installation rack, the support frames and the surface of the installation rack are on the same plane, and the two groups of support frames are distributed in parallel;
at least two sets of counterpoint mechanisms, counterpoint mechanism includes extensible member, connecting plate and counterpoint board, the extensible member passes through adjustment tank fixed mounting be in on the mounting bracket, the output end fixed mounting of extensible member has the connecting plate, fixed mounting has the counterpoint board on the connecting plate, the counterpoint board is the arc structure.
Compared with the prior art, the integral assembly process of the large mechanical synchronous cylindrical valve provided by the invention has the following beneficial effects:
the invention provides an integral assembly process of a large mechanical synchronous cylindrical valve, which finally realizes the simple integral assembly operation and high efficiency of the cylindrical valve, effectively avoids the deformation of the cylindrical valve and shortens the installation period of a water distributor; when the cylindrical valve, the top cover and the servomotor are assembled in an installation room, the sealing device is synchronously installed, so that the control of the cylinder valve group, the installation quality and the progress is facilitated, and the method is suitable for assembling and welding the large mechanical synchronous cylindrical valve in a hydraulic power plant and integrally assembling the cylindrical valve with the top cover.
Drawings
FIG. 1 is an assembly view of a cylinder valve servomotor in the overall assembly process of a large mechanical synchronous cylinder valve provided by the invention;
FIG. 2 is a three-dimensional view of a support apparatus required for assembly of a barrel valve in the overall assembly process of a large mechanical synchronous barrel valve provided by the present invention;
fig. 3 is a top view of the whole shown in fig. 2.
Reference numbers in the figures:
1. a lifting bar;
2. a special nut;
3. a first backing ring;
4. a lower cylinder cover;
5. a second backing ring;
6. a mounting frame 601, an adjusting groove;
7. a support frame;
8. the positioning mechanism 81, the telescopic piece 82, the connecting plate 83 and the positioning plate.
Detailed Description
The invention is further described with reference to the following figures and embodiments.
Referring to fig. 1, 2 and 3, fig. 1 is an assembly view of a coupling device for a barrel valve in an overall assembly process of a large mechanical synchronous barrel valve according to the present invention; FIG. 2 is a three-dimensional view of a support apparatus required for assembly of a barrel valve in the overall assembly process of a large mechanical synchronous barrel valve provided by the present invention; fig. 3 is a top view of the whole shown in fig. 2.
A large-scale mechanical synchronous cylindrical valve integral assembly process comprises the following steps:
s1, assembling a cylindrical valve, wherein a valve body of the cylindrical valve consists of two petals, and the two petals are assembled into a whole and welded in a construction site;
s2, welding the cylindrical valve by adopting a U-shaped groove and adopting a welding process of simultaneous, same-direction, same-speed, edge embedding, multiple channels and multiple layers;
s3, assembling the cylindrical valve and the top cover, lifting the top cover to the upper side of the cylindrical valve within the range of 0.05mm/m, adjusting the position and the concentricity of the top cover and the cylindrical valve cylinder body, dropping the top cover after the position and the concentricity are basically consistent, and adjusting the concentricity of the top cover leakage-stopping ring and the processing surface of the toe end of the cylindrical valve to be within 0.10 mm;
s4, installing a cylindrical valve power connector, and connecting a cylinder body and a servomotor lifting rod by adopting an embedded bolt;
and S5, a synchronous mechanism is installed, the cylindrical valve adopts a mechanical synchronous mode, and in order to convert the linear motion of the servomotor into the rotary motion of the synchronous chain wheel, the synchronization of 6 servomotors is achieved.
In the step S1, the outer diameter of the cylinder body is 9348mm, the height of the cylinder body is 1630mm, the thickness of the cylinder body is 180mm, the cylinder body is made of an ASTM A516 Gr70 steel plate, stainless steel layers are welded on an upper sealing area and a lower sealing area, the two cylinders are assembled in a butt joint mode after being leveled when the whole body is assembled, the roundness of the assembled cylinder body is not more than 1mm, the levelness of an upper plane and a lower plane is within 0.30mm, a combination bolt is 18XM56X260, the resultant torque is 550N.m, the verticality of the guide strip of the cylinder body is measured after the whole body is assembled, the verticality of the guide strip of the cylinder body is within 0.05mm/m, if the verticality of the guide strip is not enough, the cylinder body is not temporarily treated, and the cylinder body is ground after being welded.
Aiming at the characteristic that the split valve body of the cylindrical valve is thin, the U-shaped groove is adopted, and the welding process of simultaneous, same-direction, same-speed, edge-edged and multi-channel multi-layer welding is adopted during welding, so that the welding deformation of the cylinder body is effectively avoided, and the assembly size of the cylinder body is ensured.
In the step S2, the welding seam of the vertical face of the two-section cylindrical valve is preheated to 80 ℃ and is kept warm for 30 minutes, then welding is started, a step-back mode is adopted in the welding process, a welding rod with the diameter of 3.2 is selected for backing welding, a welding rod with the diameter of 4.0 is selected for vertical seam welding, welding is conducted inside and outside a combined seam in a symmetrical mode during welding, after each layer of welding is completed, stress relief is required to be hammered, and MT/PT flaw detection is required to be qualified after each layer of welding;
erecting two dial indicators at the proper position of the joint to monitor the deformation in the welding process;
and after the welding is finished, the roundness of the cylinder, the verticality of the guide strip and the planeness of the upper surface and the lower surface of the cylinder are rechecked again.
The connecting nut for bolt connection in the step S4 adopts an M110X4 nut, and is arranged in a window formed on the cylinder body, so that the bolt connection device has the following advantages:
1) The damage to the threads of the cylinder body in the mounting or dismounting process is effectively avoided;
2) When the connecting bolt of the lifting rod is broken off or the servomotor has an accident, the maintenance treatment in the pit can be realized without lifting the cylinder out of the pit;
3) A backing ring is arranged between the lifting rod and the cylinder body, so that the verticality of the cylinder body and the lifting rod can be conveniently adjusted, and the extrusion stress can be reduced;
4) A cushion ring is arranged between the lower cylinder cover of the servomotor and the top cover, so that the level of the lower cylinder cover of the servomotor can be conveniently adjusted.
According to the manufacturer's specification, firstly installing a second backing ring 5, welding the second backing ring 5 with a top cover, and polishing the upper plane of the second backing ring 5 to enable the level to meet 0.03mm/m; installing a servomotor lifting rod 1, tightening a special nut 2, and adjusting the perpendicularity of the lifting rod by polishing a first backing ring 3; after the verticality of the lifting rod is qualified to 0.1mm/m, the lifting rod is lifted out, and then a servomotor lower cylinder cover is installed; and installing the lifting rod again, retesting the verticality of the lifting rod, and if the verticality of the lifting rod does not meet the requirement, hanging the lifting rod out and polishing the first backing ring 3 again.
During installation, the verticality of the reassembled lifting rod is found to exceed the standard requirement, the verticality of each lifting rod reaches 0.39mm/m, and the verticality requirement of the lifting rod cannot be met after one month even though the backing ring is repeatedly polished.
During installation, the lift rod verticality after reassembly is found to exceed standard requirements (individual lift rod verticality reaches 0.39 mm/m), and the lift rod verticality requirements cannot be met after one month or more despite repeated grinding of the backing ring.
By analysis, this scheme suffers from the following disadvantages:
1) The lifting rod is disassembled and assembled at least twice, but no precise positioning design exists, and the absolute consistency of the front position and the rear position is difficult to ensure during re-assembly;
2) The heating temperature of the special nut and the rotation angle of the nut influence the verticality of the lifting rod;
3) The contact surface of the second backing ring 5 and the lifting rod is rough;
4) The verticality requirement of the lifting rod is higher by 0.10mm/m, the polishing amount is large, and the manual polishing is difficult to meet the requirement.
The improvement is as follows:
the verticality adjustment of the lifting rod is improved:
cleaning the position of the top cover on which the backing ring is installed, adjusting the level of the top cover to be within 0.05mm/m, finely cleaning the contact surface between the backing ring and the top cover, numbering the corresponding positions of the servomotor and the backing ring when the backing ring is detached from the servomotor, placing the backing ring at the installation position in a number-to-number manner, checking the gap of the combined surface by using a feeler gauge, and preventing the 0.03mm feeler gauge from being plugged in;
adjusting the concentricity of the backing ring and a mounting hole of a lifting rod on the top cover to be within 0.10mm, symmetrically spot-welding the side faces of the backing ring on the top cover, adopting segmented, symmetrical and backward welding, firstly welding an outer side welding seam, after the welding is finished, checking that the level of the upper plane of the backing ring is 0.03mm/m by using a frame level gauge, and if the level does not meet the requirement, applying an angle grinder and a polishing grinding wheel for grinding until the level is qualified;
and (3) hoisting the lower cylinder cover of the servomotor on the backing ring, preliminarily aligning the lower cylinder cover to be concentric with the backing ring, checking that the level of the plane of the lower cylinder cover of the servomotor is within 0.03mm/m without screwing bolts, and otherwise, hoisting the cylinder cover to process the plane of the backing ring. After the lower cylinder cover of the servomotor is qualified horizontally, installing a backing ring at a position corresponding to an installation hole of a lifting rod, closely attaching the backing ring and a cylinder body, lifting the lifting rod, loading the lifting rod into a corresponding position of the cylinder body, tightly fastening a special nut, heating the special nut by rotating the nut by an angle of 30 degrees, simultaneously checking that the gap between the lifting rod and the lower cylinder cover is uniform, checking the verticality of the lifting rod by a piano wire lifting mode, wherein the verticality is not more than 0.20mm/m, if the verticality of the lifting rod does not meet the requirement, heating the special nut to withdraw, taking out the backing ring, grinding the contact surface of the backing ring and the cylinder body, reloading the backing ring after grinding, and then installing the lifting rod until the verticality of the lifting rod is qualified;
through the verticality adjusting process of the lifting rod and the proper reduction of the verticality requirement, the verticality adjustment of the lifting rod only needs 10 days to meet the requirement.
After the installation of the lower cylinder cover of the servomotor and the verticality adjustment of the lifting rod are finished, the servomotor cylinder body → the upper cylinder cover of the servomotor → the lower thrust bearing → the conduction nut → the bearing seat → the upper thrust bearing → the disc spring → the supporting plate → other accessories are installed in sequence, and after the assembling of the servomotor and the connection of the servomotor and the cylinder body are finished, the servomotor can be integrally hung into the engine pit to participate in the preassembly of the water distributor.
And step S5, a rolling screw pair is adopted, the screw is limited by two one-way thrust ball bearings, and the radial displacement is guided and positioned by a copper sleeve fixed at the lower end of the upper cylinder cover.
The shaft seal of the screw rod adopts an O-shaped seal ring, the screw rod can only do rotary motion, in order to enable 6 operation relays to achieve synchronous motion and prevent the cylinder valve from obliquely sending hair when vertically running up and down, a double-layer chain wheel is arranged at the top end of 6 servomotor roller screw rod pairs, and then 6 chain wheels are connected in series by 6 circles of chains, so that the synchronization of the rotary chain wheels is ensured, once the cylinder valve sends the hair, the servomotor stops moving, and the servomotor screw rod continues to rotate by the transmission of the adjacent chain wheels, so that the screw rod can axially move.
When the preload force of the disc spring is exceeded, the disc spring is compressed, the travel switch is forced to act, the four-way three-position valve returns to the middle position, the whole operating mechanism stops moving, and the accident is processed.
The middle part of each circle of chain is provided with a tensioning chain wheel device to keep the chain at a certain tension, if the cylindrical valve is subjected to hairpin during operation, and when the tension of the chain exceeds the rated load, the sliding block compresses the plate spring group to close the limit switch contact arranged below the bracket, so that the four-way three-position valve returns to the middle position, the whole operation mechanism stops moving, and the accident is treated.
The indication of the switching travel of the barrel valve is in an indirect indication mode. One servomotor chain wheel is provided with a layer of chain wheels for driving the chain wheel of the indicator, and the opening and closing positions of the cylindrical valve and the percentage of the relative opening degree in the action process are reflected on the scale plate.
The adopted method for integrally assembling and hoisting the cylindrical valve and the top cover in the preassembly and assembling processes can effectively avoid the deformation of the cylindrical valve and shorten the installation period of the water distributor; when the cylindrical valve, the top cover and the servomotor are assembled in an assembly room, the sealing device is synchronously installed, and the control of the cylindrical valve group, the installation quality and the progress is facilitated.
The cartridge valve requires the use of a support apparatus during assembly, the support apparatus comprising:
the mounting rack 6 is provided with an adjusting groove 601;
the support frames 7 are mounted on the mounting frame 6 in an embedded mode, the surfaces of the support frames 7 and the surface of the mounting frame 6 are on the same plane, and the two groups of support frames 7 are distributed in parallel;
at least two sets of counterpoint mechanisms 8, counterpoint mechanism 8 includes extensible member 81, connecting plate 82 and counterpoint board 83, extensible member 81 passes through adjustment tank 601 fixed mounting be in on the mounting bracket 6, extensible member 81's output fixed mounting has connecting plate 82, fixed mounting has counterpoint board 83 on the connecting plate 82, counterpoint board 83 is the arc structure.
Two sets of 8 symmetries of counterpoint mechanism are installed on mounting bracket 6, and the surface looks adaptation of the size of the counterpoint board 83 of arc structure and cylindric valve, convenient counterpoint when two sets of counterpoint boards 83 shrink tightens up the cylindric valve of installing in the 6 tops of mounting bracket, provides reliable and stable support for the welding.
The extensible member 81 adopts a hydraulic extensible rod, is provided with the existing hydraulic equipment and control equipment during use, and provides a power source for the extension and retraction adjustment of the alignment plate 83.
During the use, install two valve body symmetries with breaking off with the fingers and thumb in the top of mounting bracket 6 and support frame 7 preferentially, start extensible member 81, extensible member 81 drives counterpoint board 83 shrink through connecting plate 82, and counterpoint board 83 presss from both sides tightly the counterpoint to the valve body after the installation, makes things convenient for the position welding to provide stable support.
Compared with the related technology, the integral assembly process of the large mechanical synchronous cylindrical valve provided by the invention has the following beneficial effects:
finally, the whole assembly operation of the cylindrical valve is simple, the efficiency is high, the deformation of the cylindrical valve is effectively avoided, and the installation period of the water distributor is shortened; when the cylindrical valve, the top cover and the servomotor are assembled in an installation room, the sealing device is synchronously installed, the control of the cylinder valve group, the installation quality and the progress is facilitated, and the method is suitable for assembling and welding the large mechanical synchronous cylindrical valve in a hydraulic power plant and integrally assembling the cylindrical valve with the top cover.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The integral assembling process of the large mechanical synchronous cylindrical valve is characterized by comprising the following steps:
s1, assembling a cylindrical valve, wherein a valve body of the cylindrical valve consists of two petals, and the two petals are assembled into a whole and welded in a construction site;
s2, welding the cylindrical valve by adopting a U-shaped groove and adopting a welding process of simultaneous, same-direction, same-speed, edging, multiple channels and multiple layers;
s3, assembling the cylindrical valve and the top cover, lifting the top cover to the upper side of the cylindrical valve within the range of 0.05mm/m, adjusting the position and the concentricity of the top cover and the cylindrical valve cylinder body, dropping the top cover after the position and the concentricity are basically consistent, and adjusting the concentricity of the top cover leakage-stopping ring and the processing surface of the toe end of the cylindrical valve to be within 0.10 mm;
s4, installing a cylindrical valve power connector, and connecting a cylinder body and a servomotor lifting rod by adopting an embedded bolt;
and S5, a synchronous mechanism is installed, the cylindrical valve adopts a mechanical synchronous mode, and in order to convert the linear motion of the servomotor into the rotary motion of the synchronous chain wheel, the synchronization of 6 servomotors is achieved.
2. The overall assembly process of the large-scale mechanical synchronous cylindrical valve according to claim 1, wherein in the step S1, the cylinder body is 9348mm in outer diameter, 1630mm in height and 180mm in thickness, is made of an ASTM A516 Gr70 steel plate, and stainless steel layers are welded on the upper sealing area and the lower sealing area.
3. The process of claim 2, wherein the two cylinders are assembled into a whole after being leveled, the roundness of the assembled cylinder is not more than 1mm, the levelness of the upper plane and the lower plane is within 0.30mm, the assembling bolt is 18XM56X260, and the assembly torque is 5500N.m.
4. The integral assembling process of the large-scale mechanical synchronous cylindrical valve according to claim 3, wherein the verticality of the guide strip of the cylinder body is measured after the integral assembling process is carried out, the verticality of the guide strip is within 0.05mm/m, if the verticality of the guide strip does not meet the requirement, the treatment is not carried out temporarily, and the grinding treatment is carried out after the cylinder body is welded.
5. The process of assembling a large-scale mechanical synchronous cylindrical valve as claimed in claim 4, wherein the welding in step S2 is performed by preheating the vertical weld of the two cylindrical valves to 80 ℃ and maintaining the temperature for 30 minutes, and then welding is started, wherein a step-by-step mode is adopted during welding, a welding rod with a diameter of 3.2 is selected for backing welding, a welding rod with a diameter of 4.0 is selected for vertical seam welding, welding is performed symmetrically inside and outside the combined seam during welding, and after each layer of welding is completed, the welding is performed by hammering to eliminate stress, and the MT/PT flaw detection is performed after each layer of welding to be qualified.
6. The overall assembly process of the large-scale mechanical synchronous cylindrical valve according to claim 5, wherein two dial indicators are erected at appropriate positions of a joint in the welding process to monitor deformation in the welding process, and after the welding is completed, the roundness of the cylinder, the verticality of the guide strip and the planeness of the upper surface and the lower surface of the cylinder are rechecked again.
7. The overall assembly process of the large-scale mechanical synchronous cylindrical valve according to claim 6, wherein the connecting nut for bolt connection in the step S4 is an M110X4 nut and is placed in a window formed in the cylinder body.
8. The overall assembly process of the large-scale mechanical synchronization cylindrical valve according to claim 7, wherein a rolling screw pair is adopted in the step S5, the screw is limited by two one-way thrust ball bearings, and the radial displacement is guided and positioned by a fixed copper sleeve arranged at the lower end of the upper cylinder cover.
9. The overall assembly process of the large-scale mechanical synchronous cylindrical valve as claimed in claim 8, wherein the shaft seal of the lead screw is an O-shaped seal ring, the lead screw only can do rotary motion, in order to achieve synchronous motion of 6 operation relays and prevent the cylindrical valve from obliquely sending hair when the cylindrical valve vertically moves up and down, the top ends of 6 servomotor roller lead screw pairs are provided with double-layer chain wheels, and then 6 chain wheels are connected in series by 6 circles of chains.
10. The process of integrally assembling a large mechanically synchronized barrel valve according to claim 1, wherein said barrel valve is assembled using a support apparatus comprising:
the mounting rack is provided with an adjusting groove;
the support frames are embedded and mounted on the mounting rack, the surfaces of the support frames and the mounting rack are on the same plane, and the two support frames are distributed in parallel;
at least two sets of counterpoint mechanisms, counterpoint mechanism includes extensible member, connecting plate and counterpoint board, the extensible member passes through adjustment tank fixed mounting be in on the mounting bracket, the output fixed mounting of extensible member has the connecting plate, fixed mounting has the counterpoint board on the connecting plate, the counterpoint board is the arc structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210832218.8A CN115430994A (en) | 2022-07-14 | 2022-07-14 | Integral assembling process for large mechanical synchronous cylindrical valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210832218.8A CN115430994A (en) | 2022-07-14 | 2022-07-14 | Integral assembling process for large mechanical synchronous cylindrical valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115430994A true CN115430994A (en) | 2022-12-06 |
Family
ID=84240967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210832218.8A Pending CN115430994A (en) | 2022-07-14 | 2022-07-14 | Integral assembling process for large mechanical synchronous cylindrical valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115430994A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101265872A (en) * | 2008-05-07 | 2008-09-17 | 天津市天发重型水电设备制造有限公司 | Hydroturbine possessing reel type valve servo |
| CN101915197A (en) * | 2010-09-07 | 2010-12-15 | 中国葛洲坝集团股份有限公司 | Installation and adjustment method for cylindrical valve of water turbine |
| CN102632369A (en) * | 2012-04-26 | 2012-08-15 | 哈尔滨电机厂有限责任公司 | Construction site processing technique of large-size integral cylindrical value |
| CN104612883A (en) * | 2015-01-26 | 2015-05-13 | 东方电气集团东方电机有限公司 | Water turbine head cover structure, water turbine cylindrical valve arrangement structure and water turbine |
| WO2017015520A1 (en) * | 2015-07-21 | 2017-01-26 | Obermeyer Henry K | Hydroelectric generating and water pumping systems and methods |
| CN108987886A (en) * | 2018-08-02 | 2018-12-11 | 林瑞 | A kind of communications satellite antenna |
-
2022
- 2022-07-14 CN CN202210832218.8A patent/CN115430994A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101265872A (en) * | 2008-05-07 | 2008-09-17 | 天津市天发重型水电设备制造有限公司 | Hydroturbine possessing reel type valve servo |
| CN101915197A (en) * | 2010-09-07 | 2010-12-15 | 中国葛洲坝集团股份有限公司 | Installation and adjustment method for cylindrical valve of water turbine |
| CN102632369A (en) * | 2012-04-26 | 2012-08-15 | 哈尔滨电机厂有限责任公司 | Construction site processing technique of large-size integral cylindrical value |
| CN104612883A (en) * | 2015-01-26 | 2015-05-13 | 东方电气集团东方电机有限公司 | Water turbine head cover structure, water turbine cylindrical valve arrangement structure and water turbine |
| WO2017015520A1 (en) * | 2015-07-21 | 2017-01-26 | Obermeyer Henry K | Hydroelectric generating and water pumping systems and methods |
| CN108987886A (en) * | 2018-08-02 | 2018-12-11 | 林瑞 | A kind of communications satellite antenna |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110208104B (en) | Quick-rotation opening type high-pressure rock triaxial pressure chamber with loading structure | |
| CN107063698B (en) | Testing mechanism, platform and testing method for side-mounted variable valve of internal combustion engine | |
| CN210945334U (en) | Endoscope actuating mechanism used in float glass tin bath | |
| US7871064B2 (en) | Repair fixture | |
| CN115430994A (en) | Integral assembling process for large mechanical synchronous cylindrical valve | |
| CN110601463A (en) | Unit motor assembly equipment | |
| CN110480540B (en) | Dot-matrix flexible cylinder sleeve excircle fixture | |
| CN117191588A (en) | Hydraulic pressure testing machine | |
| RU94895U1 (en) | RAILWAY MOUNT BEARING MOUNTING AND DISASSEMBLE STAND | |
| CN116183463A (en) | Concrete impermeability appearance of multiunit test piece | |
| CN217044114U (en) | Rolling type cold roll forming equipment | |
| CN209902739U (en) | Clamp for turbine shell | |
| CN110790488B (en) | Endoscope actuating mechanism for float glass tin bath and adjusting method thereof | |
| CN113059081B (en) | Pile head reinforcing steel bar bending device with accurate bending direction | |
| CN208123051U (en) | Gear box oil pump test rack | |
| CN217703282U (en) | Disassembling and assembling tool for high-pressure main steam valve pressure ring on high-pressure cylinder of steam turbine | |
| CN111774131B (en) | Device and method for disassembling, locking and fixing upper and lower frames of single-cylinder cone crusher | |
| CN203972007U (en) | A kind of coal pulverizer hydraulic pressure turns over roller arrangement | |
| CN111036711A (en) | Multi-roll-pitch high-rigidity high-load steel plate straightening machine | |
| CN218397295U (en) | Special mould repairing device for mould ejector rod | |
| CN210327302U (en) | Unit motor assembly equipment | |
| CN220052973U (en) | Easy-to-overhaul oil press | |
| CN220523803U (en) | Portable gas-driven hydraulic pressure testing pump | |
| CN114321031B (en) | Intelligent stepping boosting oil cylinder | |
| CN219953459U (en) | Cylinder type high-pressure cylinder positioning structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |