CN110052805B - Push plate device and method for assembling special-shaped heat exchange tube and tube plate tube hole - Google Patents
Push plate device and method for assembling special-shaped heat exchange tube and tube plate tube hole Download PDFInfo
- Publication number
- CN110052805B CN110052805B CN201910339433.2A CN201910339433A CN110052805B CN 110052805 B CN110052805 B CN 110052805B CN 201910339433 A CN201910339433 A CN 201910339433A CN 110052805 B CN110052805 B CN 110052805B
- Authority
- CN
- China
- Prior art keywords
- tube
- heat exchange
- special
- plate
- shaped heat
- 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.)
- Active
Links
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
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/02—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same
-
- 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
- B23P2700/00—Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
- B23P2700/09—Heat pipes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automatic Assembly (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
A push plate device and an assembly method of a special-shaped heat exchange tube and a tube hole of a tube plate can prevent the damage to the interior of the heat exchange tube in the assembly process and avoid a strong assembly facility with high manufacturing cost, and belongs to the technical field of manufacturing of reactors and heat exchangers. The push plate device comprises a pull rod, a locking piece, a connecting piece and a pushing piece; a plurality of push plate devices are respectively inserted into a plurality of special-shaped heat exchange tubes according to the circumferential layout, a locking part is arranged at one end of a pull rod, one end of the pull rod and the locking part are positioned in the special-shaped heat exchange tubes, and the locking part is used for simultaneously locking the pull rod and the special-shaped heat exchange tubes to form a rigid whole; the pushing piece is connected with the other end of the pull rod through the connecting piece, a plurality of external forces are simultaneously applied to the pushing pieces of the push plate devices, so that the connecting piece and the pushing pieces generate relative displacement, the rigid whole formed by the driving of the connecting piece and the pushing pieces move relatively, the reaction force of the connecting piece simultaneously pushes the tube plate through the pushing pieces, and the special-shaped heat exchange tube is inserted into the tube hole of the tube plate.
Description
Technical Field
The invention relates to an assembly method of a special-shaped heat exchange tube and tube holes of a tube plate, and belongs to the technical field of manufacturing of reactors and heat exchangers in coal, petrochemical industry, boilers, nuclear power and the like.
Background
The heat exchange tubes of reactors and heat exchangers in the industries of coal, petrochemical industry, boilers, nuclear power and the like are generally straight tubes or U-shaped tubes consisting of bent tube sections and straight tube sections, the support plates and the tube plates are arranged in a triangular or square mode, and the heat exchange tubes, the support plates and the tube plates are assembled into tube bundles, which is a key process for manufacturing products of the type, but the assembled tube bundles mainly penetrate straight sections of the straight tubes or the U-shaped tubes into the support plates and the tube plates, so that great difficulty does not exist in the process of tube bundle assembly, the assembly process is directly completed by the heat exchange tubes and the tube plates in the process of tube bundle assembly, and the tube bundles consisting of the special-shaped heat exchange tubes, the support plates and the:
1. the heat exchange tube is a special-shaped heat exchange tube formed by a plurality of straight sections, inclined straight sections and circular arc transition;
2. the supporting plate is a framework in which round steel is arranged line by line, and is different from the structure of the conventional plate with holes, and the special-shaped heat exchange tubes are required to be placed on the supporting plate line by line;
3. the supporting plates and the tube plates are arranged in a triangular or square shape at the same time, which is a common tube bundle design structure, and when the supporting plates of the designed product are arranged in a triangular shape and the tube plates are arranged in a square shape, the corresponding positions of the special-shaped heat exchange tubes on the supporting plates and the tube plates are not on the same axis.
The product with the special structure of 1-3 can not adopt a direct penetration mode to assemble the heat exchange tube and the tube hole of the tube plate. Therefore, after the special-shaped heat exchange tube, the supporting plate and the tube plate are assembled into the tube bundle, the end part of the special-shaped heat exchange tube penetrates into the tube hole of the tube plate to complete the assembly of the heat exchange tube and the tube hole of the tube plate, and then the heat exchange tube and the tube plate are connected in an expansion joint mode, a welding mode or a welding mode and an expansion mode, so that the assembly of the heat exchange tube and the tube hole of the tube plate is an important process for ensuring the normal. And the problems that the inside of the heat exchange pipe is easy to be damaged by using a sharp tool for hooking and pulling, the working strength of an operator is high, the cost of manufacturing a strong assembly facility is high and the like exist in the existing assembly process.
Disclosure of Invention
Aiming at the existing problems, the invention provides a push plate device which can prevent the damage to the interior of a heat exchange tube in the assembling process and avoid the manufacture of high-cost powerful assembling facilities, and an assembling method of a special-shaped heat exchange tube and a tube hole of a tube plate.
The invention discloses a push plate device, which is used for assembling a special-shaped heat exchange tube and tube holes of a tube plate, and comprises a pull rod 1, a locking part, a connecting part and a pushing part;
the locking piece is arranged at one end of the pull rod 1, one end of the pull rod 1 and the locking piece are positioned in the special-shaped heat exchange tube, and the locking piece is used for simultaneously locking the pull rod 1 and the special-shaped heat exchange tube to form a rigid whole;
the pushing piece is connected with the other end of the pull rod 1 through the connecting piece, external force is applied to the pushing piece to enable the connecting piece and the pushing piece to generate relative displacement, the connecting piece drives the pull rod 1 to enable a rigid whole formed by the special-shaped heat exchange tube, the pull rod 1 and the locking piece to move relative to the pushing piece, and the reaction force of the rigid whole pushes the tube plate through the pushing piece to enable the special-shaped heat exchange tube to be inserted into the tube hole of the tube plate.
Preferably, the locker includes: the expansion block 2, the push rod 3 and the fixing nut 4;
the pull rod 1 is cylindrical, an external thread is arranged at one end of the pull rod 1, and a square cross section for screwing is arranged at the end part of the end;
the expansion block 2 and the push rod 3 are both of a hollow structure, the expansion block 2 and the push rod 3 are sequentially sleeved outside the pull rod 1, the head end of the expansion block 2 is opposite to one end of the pull rod 1, and the tail end of the expansion block 2 and the head end of the push rod 3 are abutted on the rod body of the pull rod 1;
when the thrust of the push rod 3 to the expansion block 2 is increased, the expansion block 2 is changed from the unexpanded state to the expanded state, otherwise, the expansion block 2 is changed from the expanded state to the unexpanded state;
and the fixing nut 4 penetrates through the other end of the pull rod 1 and is meshed with the external thread at the other end of the pull rod 1, and the fixing nut is used for fixing the positions of the expansion block 2 and the push rod 3 on the pull rod 1 and generating thrust on the push rod 3 and the expansion block 2.
Preferably, the shaft of the pull rod 1 is set to a truncated cone with a gradually increased diameter from one end of the shaft, the shaft of the push rod 3 is set to a truncated cone with a gradually decreased diameter from the head end of the shaft, the shape of the head end of the expansion block is matched with that of one end of the pull rod 1, and the shape of the tail end of the expansion block is matched with that of the head end of the push rod 3.
Preferably, the connecting piece is a tension nut 5, and the pushing piece comprises a washer 6 and a sleeve 7;
the pull nut 5 is sleeved at the other end of the pull rod 1, threads are arranged inside and outside the pull nut 5, and internal threads of the pull nut 5 are meshed with external threads at the other end of the pull rod 1 and are adjacent to the fixing nut 4;
the gasket 6 is sleeved on the outer surface of the push rod 3, the head end of the sleeve 7 is abutted to the tail end of the gasket 6, threads are arranged on the inner cylinder wall of the sleeve 7 and are meshed with the external threads of the tension nut 5, and the head end of the gasket 6 is abutted to the tube plate.
Preferably, the rear end of the sleeve 7 is of square cross-section for connection to a turning tool.
Preferably, the side surface of the head end of the sleeve 7 is provided with a welding window for welding and fixing the special-shaped heat exchange tube inserted into the tube hole and the tube plate.
Preferably, the end face of the rear end of the washer 6 is provided with a concave structure in which the end of the front end of the sleeve 7 is located for limiting the turning position of the sleeve 7.
The invention also provides an assembly method of the special-shaped heat exchange tube and the tube hole of the tube plate, which is realized on the basis of the plate pushing device and the supporting device in claim 1, wherein the supporting device is used for supporting the low-position tube plate, the high-position tube plate and the supporting plate, and the method comprises the following steps:
supporting the low-level tube plate and the supporting plate by using a supporting device, assembling the special-shaped heat exchange tubes, the supporting plate and the corresponding low-level tube plate into a tube bundle line by line according to an assembling sequence from low to high, using deflection formed by the self weight of the special-shaped heat exchange tubes in the process of assembling the tube bundle, inserting the end parts of the special-shaped heat exchange tubes into tube plate holes, and completely assembling the end parts of the special-shaped heat exchange tubes into the corresponding tube plate holes by using a plurality of push plate devices so as to meet the requirements of design drawings;
supporting a high-position tube plate by using a supporting device, assembling the special-shaped heat exchange tubes, the supporting plates and the corresponding high-position tube plates into a tube bundle line by line according to an assembling sequence from low to high, inserting the end parts of the special-shaped heat exchange tubes into tube plate holes by using deflection formed by the self weight of the special-shaped heat exchange tubes in the process of assembling the tube bundle, and completely assembling the end parts of the special-shaped heat exchange tubes into the corresponding tube plate holes by using a plurality of push plate devices so as to meet the requirements of design drawings;
the method for completely assembling the end parts of the special-shaped heat exchange tubes into the tube holes of the corresponding tube plates by utilizing the plurality of push plate devices comprises the following steps:
the center of the tube plate is taken as an axis, the plurality of push plate devices are respectively inserted into the plurality of special-shaped heat exchange tubes according to the annular layout, and after the locking parts of the push plate devices are fastened with the special-shaped heat exchange tubes, the pushing parts of the push plate devices push the tube plate until the special-shaped heat exchange tubes and tube holes of the tube plate are assembled.
Preferably, the method for completely assembling the ends of the profiled heat exchange tubes into the tube holes of the corresponding tube plate by using the push plate device of claim 4 comprises the following steps:
s1, taking a plurality of push plate devices, assembling the pull rod 1, the expansion block 2, the push rod 3 and the fixing nut 4 of each push plate device for the first time, wherein the expansion block 2 is in a non-expansion state, the center of the tube plate is taken as an axis, the plurality of push plate devices assembled for the first time are respectively inserted into the plurality of special-shaped heat exchange tubes according to the circumferential layout, the position of the fixing nut 4 is kept, the tail end part of the pull rod 1 is rotated, the distance between the head end part of the pull rod 1 and the head end part of the push rod 3 is reduced, the expansion block 2 is expanded, and the special-shaped heat exchange tubes, the pull rod 1, the expansion block 2, the push rod 3 and the fixing;
s2, on the basis of the plate pushing device assembled for the first time, screwing a tension nut 5 on the end part of the tail end of the pull rod 1, sleeving a gasket 6 on the tension nut, screwing the tension nut into a sleeve 7, and meshing the internal thread of the sleeve with the external thread of the tension nut 5 to enable the gasket 6 to be padded between the tube plate and the sleeve 7, so that the three are attached;
s3, controlling the plurality of sleeves to rotate simultaneously, enabling the tension nut 5 to generate relative displacement in the sleeve 7, enabling the tension nut 5 to drive the pull rod 1 to enable the rigid whole formed by the special-shaped heat exchange tube, the pull rod 1, the expansion block 2, the push rod 3 and the fixing nut 4 to move relative to the sleeve 7, and enabling the reaction force to push the tube plate through the gasket 6 and the sleeve 7 to enable the special-shaped heat exchange tube to be inserted into the tube hole of the tube plate.
Preferably, after the assembly is completed, the special-shaped heat exchange tube with the end portion retracted inside the tube hole of the corresponding tube plate is drawn by the push plate device of claim 6 again, and then the special-shaped heat exchange tube is fixed with the tube plate in a welding mode in the welding window at the head end of the sleeve 7.
The invention has the advantages that the tube bundle consisting of the special-shaped heat exchange tube, the supporting plate and the tube plate is supported by the supporting device, after the tube bundle is assembled, the special-shaped heat exchange tube is assembled with the tube hole of the tube plate by adopting the push plate device of the invention, the special-shaped heat exchange tube is locked by utilizing the locking parts of the plurality of push plate devices, after the special-shaped heat exchange tube is fixed, the special-shaped heat exchange tube and the special-shaped heat exchange tube are moved relatively by the pushing part of the push plate device, the tube plate is pushed by the reaction force of the pushing part through the pushing part, the special-shaped heat exchange tube is inserted into the tube hole of the tube plate, the assembly is finished, and for the special case that part of. The invention can ensure the smooth assembly of the special-shaped heat exchange tube and the tube plate, prevent the damage to the interior of the heat exchange tube caused by hooking and pulling by using a sharp tool in the existing assembly process, and avoid manufacturing a high-cost strong assembly facility. The invention can be used in combination with an electric wrench, effectively reduces the working strength of operators, and has remarkable popularization value in the assembling process of heat exchange tubes and tube holes of tube plates of the same type of products.
Drawings
FIG. 1 is an exploded view of a pusher mechanism;
FIG. 2 is a cross-sectional view of the construction of the pusher mechanism;
FIG. 3 is a schematic structural view of a support device and an applied product;
FIG. 4 is an enlarged view of a portion I of FIG. 3;
FIG. 5 is a schematic view of the initial state of the plate pushing device during operation;
FIG. 6 is an enlarged fragmentary view of the unexpanded section II of the expander of FIG. 5;
FIG. 7 is a schematic view showing the end state of the pushing plate of the plate pushing device;
FIG. 8 is an enlarged fragmentary view of the expanded portion III of the expander of FIG. 7;
FIG. 9 is a flow chart of a method in accordance with an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
The push plate device of the embodiment is used for assembling a special-shaped heat exchange tube and a tube hole of a tube plate, and comprises a pull rod 1, a locking piece, a connecting piece and a pushing piece;
the locking piece is arranged at one end of the pull rod 1, one end of the pull rod 1 and the locking piece are positioned in the special-shaped heat exchange tube, and the locking piece is used for simultaneously locking the pull rod 1 and the special-shaped heat exchange tube to form a rigid whole;
the pushing piece is connected with the other end of the pull rod 1 through a connecting piece, the connecting piece is used for driving the pull rod 1, so that a rigid whole consisting of the special-shaped heat exchange tube, the pull rod 1 and the locking piece and the pushing piece do relative motion, the reaction force pushes the tube plate through the pushing piece, and the special-shaped heat exchange tube is inserted into the tube hole of the tube plate;
the push plate device of the embodiment is provided with a locking piece, a connecting piece and a pushing piece, the locking piece enables the special-shaped heat exchange tube and the pull rod 1 to form a rigid whole, the pushing piece is connected with the other end of the pull rod 1 through the connecting piece, external force is applied to the pushing piece to enable the connecting piece and the pushing piece to generate relative displacement, the connecting piece drives the pull rod 1 to enable the rigid whole formed by the special-shaped heat exchange tube, the pull rod 1 and the locking piece to move relative to the pushing piece, and the reaction force of the connecting piece pushes the tube plate through the pushing piece to enable. Therefore, the plate pushing device of the embodiment can push the tube plate and draw the special-shaped heat exchange tube at the same time, and the end part of the special-shaped heat exchange tube is infinitely close to the tube hole of the tube plate until the end part of the special-shaped heat exchange tube is completely inserted into the tube hole of the tube plate. The push plate device of the embodiment can ensure that the special-shaped heat exchange tube and the tube plate are assembled smoothly, and the damage to the inside of the heat exchange tube cannot be caused.
As shown in fig. 1 and 2, the locker of the present embodiment includes: the expansion block 2, the push rod 3 and the fixing nut 4;
the pull rod 1 is cylindrical, and one end of the pull rod 1 is provided with an external thread and a square cross section for screwing;
the expansion block 2 and the push rod 3 are both of a hollow structure, the expansion block 2 and the push rod 3 are sequentially sleeved outside the pull rod 1, the head end of the expansion block 2 is opposite to one end of the pull rod 1, and the tail end of the expansion block 2 and the head end of the push rod 3 are abutted on the rod body of the pull rod 1;
when the thrust of the push rod 3 to the expansion block 2 is increased, the expansion block 2 is changed from the unexpanded state to the expanded state, otherwise, the expansion block 2 is changed from the expanded state to the unexpanded state;
and the fixing nut 4 penetrates through the other end of the pull rod 1 and is meshed with the external thread at the other end of the pull rod 1, and the fixing nut is used for fixing the positions of the expansion block 2 and the push rod 3 on the pull rod 1 and generating thrust on the push rod 3 and the expansion block 2.
The expansion block 2 of the embodiment is arranged between the pull rod 1 and the special-shaped heat exchange tube, when the expansion block is in an expansion state, the pull rod 1 and the special-shaped heat exchange tube are locked, when the expansion block 2 is in an expansion state, the expansion block is determined by the pull rod 1 and the push rod 3, the distance between the pull rod and the push rod is reduced, the expansion block 2 is extruded by the pull rod 1 and the push rod 3, the diameter of the expansion block is increased, a gap between the expansion block and the special-shaped heat exchange tube is eliminated, the contact area between the expansion block 2 and the inner wall of the special-shaped heat exchange tube is obviously increased, sufficient friction force. The locking of this embodiment can not cause the damage to special-shaped heat exchange tube.
In the present embodiment, the shaft of the drawbar 1 is set to a truncated cone with a gradually increasing diameter from one end thereof, the shaft of the pushrod 3 is set to a truncated cone with a gradually decreasing diameter from the head end thereof, the shape of the head end of the expansion block is matched with the shape of one end of the drawbar 1, and the shape of the tail end of the expansion block is matched with the shape of the head end of the pushrod 3.
The rod body of the pull rod 1 of the embodiment is set to be a truncated cone with gradually increased diameter from one end part of the rod body, the expansion block 2 and the push rod 3 are sequentially sleeved outside the pull rod 1, the other end of the pull rod 1 is provided with external threads which are sequentially meshed with the fixing nut 4 and the pulling nut 5, and the end part of the pull rod is provided with a square section for screwing
This embodiment bloated piece 2 is hollow structure, the cover is outside at pull rod 1, the head end of bloated piece 2 is relative with the one end tip of pull rod 1, the tail end of bloated piece 2 and the head end of push rod 3 support on the pole body of pull rod 1, 2 head and the tail both ends outsides of bloated piece are equipped with less tapering, increase push rod 3 is to bloated piece 2 thrust, bloated piece 2 is by the unexpanded state to expanded state, 2 bloated back head and the tail both ends resume to the cylinder state by the circular truncated cone, show the increase and the area of contact of special-shaped heat exchange tube inner wall, produce sufficient frictional force after closely laminating.
In the embodiment, the push rod 3 is of a hollow structure and is sleeved outside the pull rod 1, the tail end of the expansion block 2 and the head end of the push rod 3 are abutted against each other on the rod body of the pull rod 1, and the tail end of the expansion block is in contact with the fixing nut 4.
The fixing nut 4 is a hexagon nut, and the inner thread of the fixing nut is meshed with the outer thread of the outer surface of the rear section of the pull rod 1.
As shown in fig. 1 and 2, the connecting member of the present embodiment is a tension nut 5, and the pushing member includes a washer 6 and a sleeve 7;
the pull nut 5 is sleeved at the other end of the pull rod 1, threads are arranged inside and outside the pull nut 5, and internal threads of the pull nut 5 are meshed with external threads at the other end of the pull rod 1 and are adjacent to the fixing nut 4;
the gasket 6 is sleeved on the outer surface of the push rod 3, the head end of the sleeve 7 is abutted to the tail end of the gasket 6, threads are arranged on the inner cylinder wall of the sleeve 7 and are meshed with the external threads of the tension nut 5, and the head end of the gasket 6 is abutted to the tube plate.
In the state of retaining member locking, the pulling force nut 5 cover of this embodiment is on the external screw thread of pull rod 1, and mesh with it, and the position after the pulling force nut 5 meshing offsets with fixation nut 4, the external screw thread of pulling force nut 5 and the internal thread meshing of sleeve 7, packing ring 6 offsets with the tube sheet, rotate sleeve 7, pulling force nut 5 produces relative motion on the internal thread of sleeve 7, pulling force nut 5 drives pull rod 1, make the rigidity whole that dysmorphism heat exchange tube, pull rod 1 and retaining member are constituteed do relative motion with the impeller, its reaction force passes through impeller promotion tube sheet, make dysmorphism heat exchange tube insert in the tube sheet tube hole, accomplish the assembly.
The pull nut 5 of the present embodiment is a non-standard nut, the inner thread of which is engaged with the outer thread of the outer surface of the rear section of the pull rod 1, the outer thread of which is engaged with the inner thread of the sleeve 7, and the rear section of the pull nut 5 has a square cross section for screwing.
The sleeve 7 of this embodiment has a square cross-section at its rear end for connection to a rotary tool, and is used for connection to an electric wrench.
The side surface of the head end of the sleeve 7 of the embodiment is provided with a welding operation window for welding the special-shaped heat exchange tube inserted into the tube hole with the tube plate.
The tail end terminal surface of the gasket 6 of the embodiment is provided with an inner concave structure, and the head end of the sleeve 7 is positioned in the inner concave structure, so that the rotation position of the sleeve 7 is limited, and the scratch on the surface of the pipe plate in the rotation process of the sleeve is prevented.
In the method for assembling the special-shaped heat exchange tube and the tube hole of the tube plate, the method is realized based on the push plate device, the supporting device and the electric wrench tool for reducing labor intensity, and as shown in fig. 3 and 4, the device and the tool are reasonably combined and used in sequence during the assembling process to complete the assembling of the special-shaped heat exchange tube and the tube plate. The supporting device of the embodiment is used for supporting the low-position tube plate, the high-position tube plate and the supporting plate, and comprises a low-position tube plate supporting device 8, a high-position tube plate supporting device 9 and a supporting plate supporting device 10;
the low-position tube plate supporting device 8 mainly comprises a sliding arc plate, a vertical plate, a bottom plate and rib plate parts, wherein the sliding arc plate is mainly used for placing the low-position tube plate, the low-position tube plate can slide along the axis of a circular arc in the sliding arc plate in the process that the push plate device is matched with an electric wrench to implement a push plate, and the main functions of other parts are that the sliding arc plate is supported. The low-position tube plate supporting device and the high-position tube plate supporting device in the supporting device are respectively installed, and the arrangement mode creates the greatest convenience for the smooth assembly process mainly because the special-shaped heat exchange, the supporting plate and the tube plate are complex in structure and large in quantity, and interference is easily generated with other devices and parts in the assembly process.
The high-position tube plate supporting device 9 mainly comprises a sliding arc plate, a vertical plate, a bottom plate and rib plate parts, wherein the sliding arc plate is mainly used for placing the high-position tube plate, the high-position tube plate can slide along the axis of a circular arc in the sliding arc plate in the process that the push plate device is matched with an electric wrench push plate, and the main function of other parts is to support the sliding arc plate.
The supporting plate supporting device 10 mainly comprises an arc plate, a vertical plate, a bottom plate and rib plate parts, wherein the arc plate is mainly used for supporting the supporting plate, and the stability of the tube bundle in the whole assembling process is ensured.
As shown in fig. 9, the assembly method of the present embodiment includes the following steps:
(1) according to the structure and size requirements of a design drawing, a device for supporting a supporting plate and a low-position tube plate in a supporting device is placed on the flat ground according to the positions corresponding to the product supporting plate and the tube plate, and the low-position tube plate is placed on a low-position tube plate supporting device;
(2) assembling the special-shaped heat exchange tubes, the supporting plates and the corresponding low-position tube plates into a tube bundle line by line according to an assembling sequence from low to high, wherein the deflection formed by the weight of the special-shaped heat exchange tubes is utilized in the tube bundle assembling process, the end parts of the special-shaped heat exchange tubes are inserted into tube holes of the tube plates, the centers of the tube plates are taken as axes, a plurality of push plate devices are respectively inserted into the special-shaped heat exchange tubes according to the circumferential layout, and after a locking part of each push plate device is fastened with the special-shaped heat exchange tubes, a pushing part of each push plate device pushes the tube plates until the end parts of the special-shaped heat exchange tubes are completely assembled into the tube holes of the corresponding tube plates, so that the requirements of design drawings are met, the;
(3) the high-position tube plate supporting device is in place and the high-position tube plate is placed on the high-position tube plate supporting device;
(4) assembling the special-shaped heat exchange tubes, the supporting plates and the corresponding high-position tube plates into a tube bundle line by line according to an assembling sequence from low to high, wherein the deflection formed by the self weight of the special-shaped heat exchange tubes is utilized in the tube bundle assembling process, the end parts of the special-shaped heat exchange tubes are inserted into tube holes of the tube plates, the centers of the tube plates are taken as axes, a plurality of push plate devices are respectively inserted into the special-shaped heat exchange tubes according to the circumferential layout, and after a locking part of each push plate device is fastened with the special-shaped heat exchange tubes, a pushing part of each push plate device pushes the tube plates until the end parts of the special-shaped heat exchange tubes are completely assembled into the corresponding tube holes of the tube plates, so that the requirements of design drawings are met;
and after the plate pushing process is finished, taking out the plate pushing device, and assembling the other tube plate tube holes and the special-shaped heat exchange tubes. And for the special case that the special-shaped heat exchange tube and the tube hole of the tube plate are not assembled in place due to the size deviation of the tube bending process, continuously adopting a push plate device to match with an electric wrench with larger torque to draw to the position of the design drawing until all assembly work is finished.
In this embodiment, a specific method for completely assembling the end of the special-shaped heat exchange tube into the tube hole of the corresponding tube plate by using a plurality of push plate devices includes:
s1, taking a plurality of push plate devices, assembling the pull rod 1, the expansion block 2, the push rod 3 and the fixing nut 4 of each push plate device for the first time, wherein, under the non-expansion state of the expansion block 2, as shown in figure 5 and figure 6, a plurality of first-assembled push plate devices are respectively inserted into a plurality of special-shaped heat exchange tubes according to the circumferential layout by taking the center of the tube plate as an axis, the position of the fixing nut 4 is kept by a manual wrench, the electric wrench rotates the tail end part of the pull rod 1, the distance between the head end part of the pull rod 1 and the head end part of the push rod 3 is reduced, the expansion block 2 expands, the head end and the tail end of the expanded expansion block are restored to be in a cylindrical state by taper, the contact area with the inner wall of the special-shaped heat exchange pipe is obviously increased, and sufficient friction force is generated after the expansion block is tightly attached, so that the special-shaped heat exchange tube, the pull rod 1, the expansion block 2, the push rod 3 and the fixing nut 4 form a rigid whole, as shown in fig. 7 and 8;
s2, on the basis of the first-time assembled push plate device, after the push plate device is fastened with the special-shaped heat exchange tube, a pull nut 5 is screwed on the end part of the tail end of the pull rod 1, a gasket 6 is sleeved on the pull nut, the pull nut is screwed into a sleeve 7, the internal thread of the sleeve is meshed with the external thread of the pull nut, the gasket 6 is padded between the tube plate and the sleeve 7, and the three are attached to each other;
s3, connecting the square section at the tail of the sleeve 7 with an electric wrench, starting the electric wrench by multiple operators in a unified way, controlling the multiple sleeves to rotate simultaneously by the driving of the electric wrenches, generating relative displacement in the rotating sleeve 7 by the tension nut 5, but because of the friction force between the expansion block and the inner wall of the special-shaped heat exchange tube generated by the expansion of the expansion block, the special-shaped heat exchange tube, the pull rod 1, the expansion block 2, the push rod 3 and the fixing nut 4 form a rigid whole, because the sleeve is tightly pressed against the tube plate through the gasket, the sleeve drives the reaction force of the rigid whole body to be applied to the tube plate through the gasket and the sleeve through the tension nut 5 to push the tube plate and the special-shaped heat exchange tube to generate relative displacement, so that the special-shaped heat exchange tube is inserted into the tube hole of the tube plate, the position of the special-shaped heat exchange tube in the tube hole of the tube plate meets the requirement of a design drawing after assembly, namely the assembly of the special-shaped heat exchange tube and the tube hole of the tube plate is completed.
After the process of pushing the plate is completed, an electric wrench is adopted to reversely rotate the sleeve 7, the sleeve 7 is separated from the pushing plate device, then the wrench is adopted to fix the square section of the last section of the pull rod, the pull nut 5 and the fixing nut 4 are sequentially disassembled, the expansion block 2 is restored to the original state after the pulling force and the pushing force of the pull rod 1 and the push rod 3 are removed, the friction force with the inner wall of the special-shaped heat exchange tube is eliminated, and the pushing plate device can be taken out to carry out the assembly work of other tube plate tube holes and the special-shaped heat exchange.
Generally, most of push plate works are finished, but a special case that the assembly of the special-shaped heat exchange tube and the tube hole of the tube plate is not in place due to the size deviation of the tube bending process and a smaller free moving distance exists locally, namely the end part of the special-shaped heat exchange tube is retracted inside the tube hole of the tube plate, and the requirements of design drawings are not met. Under the condition, most of the special-shaped heat exchange tubes, the supporting plates and the tube plates are assembled and assembled, and the connection is completed by adopting a connection mode of expansion joint, welding or expansion after welding, so that for special cases, a push plate device can be adopted to match with an electric wrench with larger torque for drawing, the special-shaped heat exchange tubes and the tube plates are temporarily fixed in a welding mode by utilizing a welding window at the head end of the sleeve, and repeated retraction caused by the elasticity of the special-shaped heat exchange tubes is prevented by adopting a subsequent formal connection mode. The other assembled special-shaped heat exchange tubes and tube plates are not influenced by special cases, and the measures are repeated until all special cases are processed to finish all assembly work.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous 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 features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.
Claims (8)
1. A push plate device is used for assembling a special-shaped heat exchange tube and a tube hole of a tube plate and is characterized by comprising a pull rod (1), a locking part, a connecting part and a pushing part;
the locking piece is arranged at one end of the pull rod (1), one end of the pull rod (1) and the locking piece are positioned in the special-shaped heat exchange tube, and the locking piece is used for simultaneously locking the pull rod (1) and the special-shaped heat exchange tube to form a rigid whole;
the pushing piece is connected with the other end of the pull rod (1) through the connecting piece, external force is applied to the pushing piece to enable the connecting piece and the pushing piece to generate relative displacement, the connecting piece drives the pull rod (1) to enable a rigid whole consisting of the special-shaped heat exchange tube, the pull rod (1) and the locking piece to move relative to the pushing piece, and the reaction force of the rigid whole pushes the tube plate through the pushing piece to enable the special-shaped heat exchange tube to be inserted into the tube hole of the tube plate;
the retaining member includes: the expansion block (2), the push rod (3) and the fixing nut (4);
the pull rod (1) is cylindrical, an external thread is arranged at one end of the pull rod (1), and a square cross section for screwing is arranged at the end part of the end;
the expansion block (2) and the push rod (3) are both of hollow structures, the expansion block (2) and the push rod (3) are sequentially sleeved outside the pull rod (1), the head end of the expansion block (2) is opposite to the end part of one end of the pull rod (1), and the tail end of the expansion block (2) and the head end of the push rod (3) are abutted on the rod body of the pull rod (1);
when the thrust of the push rod (3) to the expansion block (2) is increased, the expansion block (2) is changed from the unexpanded state to the expanded state, and on the contrary, the expansion block (2) is changed from the expanded state to the unexpanded state;
the fixing nut (4) penetrates through the other end of the pull rod (1) and is meshed with the external thread at the other end of the pull rod (1), and the fixing nut is used for fixing the positions of the expansion block (2) and the push rod (3) on the pull rod (1) and generating thrust on the push rod (3) and the expansion block (2);
the connecting piece is a tension nut (5), and the pushing piece comprises a gasket (6) and a sleeve (7);
the pull nut (5) is sleeved at the other end of the pull rod (1), threads are arranged inside and outside the pull nut (5), and internal threads of the pull nut (5) are meshed with external threads at the other end of the pull rod (1) and are adjacent to the fixing nut (4);
the outer surface of push rod (3) is overlapped in packing ring (6), and the tail end tip of head end tip and packing ring (6) of sleeve (7) offsets, is equipped with the screw on the inner tube wall of sleeve (7), and this screw meshes with the external screw thread of pulling force nut (5), and the head end tip of packing ring (6) is used for offsetting with the tube sheet.
2. The pusher plate device according to claim 1, wherein the shaft of the drawbar (1) is provided with a truncated cone having a diameter gradually increasing from the shaft end thereof to the tip end thereof, the shaft of the pushrod (3) is provided with a truncated cone having a diameter gradually decreasing from the shaft end to the tip end thereof, the shape of the tip end of the expansion block is matched with the shape of the tip end of the drawbar (1), and the shape of the tail end of the expansion block is matched with the shape of the tip end of the pushrod (3).
3. The pusher device according to claim 1, characterized in that the rear end of the sleeve (7) is of square section for the attachment of a rotary tool.
4. The push plate device according to claim 1, wherein the side of the head end of the sleeve (7) is provided with a welding window for welding and fixing the profiled heat exchange tube inserted into the tube hole and the tube plate.
5. Pusher device according to claim 1, characterized in that the end surface of the rear end of the washer (6) is provided with a concave structure in which the end of the front end of the sleeve (7) is located for limiting the turning position of the sleeve (7).
6. A method for assembling a special-shaped heat exchange tube and tube holes of a tube plate, which is implemented based on a support device and a push plate device of claim 1, wherein the support device is used for supporting a low-position tube plate, a high-position tube plate and a support plate, and the method comprises the following steps:
supporting the low-level tube plate and the supporting plate by using a supporting device, assembling the special-shaped heat exchange tubes, the supporting plate and the corresponding low-level tube plate into a tube bundle line by line according to an assembling sequence from low to high, using deflection formed by the self weight of the special-shaped heat exchange tubes in the process of assembling the tube bundle, inserting the end parts of the special-shaped heat exchange tubes into tube plate holes, and completely assembling the end parts of the special-shaped heat exchange tubes into the corresponding tube plate holes by using a plurality of push plate devices so as to meet the requirements of design drawings;
supporting a high-position tube plate by using a supporting device, assembling the special-shaped heat exchange tubes, the supporting plates and the corresponding high-position tube plates into a tube bundle line by line according to an assembling sequence from low to high, inserting the end parts of the special-shaped heat exchange tubes into tube plate holes by using deflection formed by the self weight of the special-shaped heat exchange tubes in the process of assembling the tube bundle, and completely assembling the end parts of the special-shaped heat exchange tubes into the corresponding tube plate holes by using a plurality of push plate devices so as to meet the requirements of design drawings;
the method for completely assembling the end parts of the special-shaped heat exchange tubes into the tube holes of the corresponding tube plates by utilizing the plurality of push plate devices comprises the following steps:
the center of the tube plate is taken as an axis, the plurality of push plate devices are respectively inserted into the plurality of special-shaped heat exchange tubes according to the annular layout, and after the locking parts of the push plate devices are fastened with the special-shaped heat exchange tubes, the pushing parts of the push plate devices push the tube plate until the special-shaped heat exchange tubes and tube holes of the tube plate are assembled.
7. An assembly method according to claim 6, wherein the method of fully assembling the ends of the profiled heat exchange tubes into the tube holes of the respective tube sheet using the push plate device of claim 1 comprises:
s1, taking a plurality of push plate devices, assembling a pull rod (1), an expansion block (2), a push rod (3) and a fixing nut (4) of each push plate device for the first time, wherein the expansion block (2) is in a non-expansion state, the center of a tube plate is taken as an axis, the plurality of push plate devices assembled for the first time are respectively inserted into a plurality of special-shaped heat exchange tubes according to the annular layout, the position of the fixing nut (4) is kept, the tail end part of the pull rod (1) is rotated, the distance between the head end part of the pull rod (1) and the head end part of the push rod (3) is reduced, the expansion block (2) is expanded, and the special-shaped heat exchange tubes, the pull rod (1), the expansion block (2), the push rod (3) and the fixing nut (4;
s2, on the basis of the plate pushing device assembled for the first time, screwing a tension nut (5) on the end part of the tail end of the pull rod (1), sleeving a gasket (6), screwing a sleeve (7), and meshing the internal thread of the sleeve with the external thread of the tension nut (5) to enable the gasket (6) to be padded between the tube plate and the sleeve (7) and enable the gasket, the tube plate and the sleeve (7) to be attached;
s3, controlling the plurality of sleeves to rotate simultaneously, enabling the tension nut (5) to generate relative displacement in the sleeve (7), enabling the tension nut (5) to drive the pull rod (1) to enable the rigid whole composed of the special-shaped heat exchange tube, the pull rod (1), the expansion block (2), the push rod (3) and the fixing nut (4) to move relative to the sleeve (7), and enabling the reaction force to push the tube plate through the gasket (6) and the sleeve (7) to enable the special-shaped heat exchange tube to be inserted into the tube plate hole.
8. An assembling method according to claim 7, characterized in that after the assembling is completed, the push plate device of claim 4 is adopted again to draw the special-shaped heat exchange tube with the end part retracted in the tube hole of the corresponding tube plate, and then the special-shaped heat exchange tube is fixed with the tube plate in a welding window at the head end of the sleeve (7) in a welding mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910339433.2A CN110052805B (en) | 2019-04-25 | 2019-04-25 | Push plate device and method for assembling special-shaped heat exchange tube and tube plate tube hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910339433.2A CN110052805B (en) | 2019-04-25 | 2019-04-25 | Push plate device and method for assembling special-shaped heat exchange tube and tube plate tube hole |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110052805A CN110052805A (en) | 2019-07-26 |
| CN110052805B true CN110052805B (en) | 2021-01-15 |
Family
ID=67320774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910339433.2A Active CN110052805B (en) | 2019-04-25 | 2019-04-25 | Push plate device and method for assembling special-shaped heat exchange tube and tube plate tube hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110052805B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111266854B (en) * | 2020-03-11 | 2021-07-30 | 芜湖易迅生产力促进中心有限责任公司 | Automatic assembly equipment for heat exchange tube of marine heat exchanger |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7396060B2 (en) * | 2004-07-20 | 2008-07-08 | Huncovsky Jeffery W | Pipe pulling device |
| CN201816024U (en) * | 2010-09-30 | 2011-05-04 | 中国石油化工股份有限公司 | Slip embedded tensioner |
| US8863387B2 (en) * | 2012-01-26 | 2014-10-21 | Conco Systems, Inc. | System for plugging heat exchanging tubes |
| CN202963941U (en) * | 2012-12-07 | 2013-06-05 | 无锡化工装备有限公司（原无锡化工装备总厂) | Heat exchange tube length adjusting propeller |
| CN103111544B (en) * | 2013-02-21 | 2015-12-16 | 四川川润动力设备有限公司 | A kind of Portable pipe traction device |
| CN204843490U (en) * | 2015-06-25 | 2015-12-09 | 哈尔滨哈锅锅炉容器工程有限责任公司 | A drag hammer frock for restraining post assembling is rectified |
| CN207223846U (en) * | 2017-04-28 | 2018-04-13 | 上海森松新能源设备有限公司 | The horizontal assembly tool of heat transmission equipment heat exchanger tube |
| CN207874090U (en) * | 2017-11-24 | 2018-09-18 | 张化机（苏州）重装有限公司 | A kind of heat exchanger tube poling guide head |
| CN208323995U (en) * | 2018-05-06 | 2019-01-04 | 内蒙古君诚兴业管道有限责任公司 | A kind of on-line automatic concentricity poling plugging device and automatic foaming production line |
| CN108680051A (en) * | 2018-05-08 | 2018-10-19 | 哈尔滨锅炉厂有限责任公司 | Heat exchanger tube-tube sheet assembling structure and its welding method |
-
2019
- 2019-04-25 CN CN201910339433.2A patent/CN110052805B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN110052805A (en) | 2019-07-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20200149850A1 (en) | Internally Coupleable Joint | |
| US7641430B2 (en) | Nut plates and threaded inserts and methods of assembling and installing the same | |
| US6345431B1 (en) | Joining thermoplastic pipe to a coupling | |
| CN110052805B (en) | Push plate device and method for assembling special-shaped heat exchange tube and tube plate tube hole | |
| CN108571510B (en) | Turnover type unilateral bolt fastener | |
| CN105317802A (en) | Blind rivet for connecting composite materials capable of adjusting interlayer thickness range | |
| CN214405054U (en) | Petrochemical is flange joint device for pipeline convenient to installation | |
| CN104646908A (en) | Inner supporting device for sealing girth of 5M-grade storage tank | |
| US2268088A (en) | Spiral expander tool | |
| CN106312920A (en) | Retainer mounting and dismounting device | |
| CN110936327B (en) | Thimble position adjustable unilateral bolt fastener mounting tool | |
| CN108547844B (en) | Sectional type unilateral bolt fastener | |
| CN212429466U (en) | Bolt and nut capable of being installed quickly | |
| CN209217563U (en) | Busbar assembly and Cubicle Gas-Insulated Switchgear | |
| CN212859287U (en) | Clamping type wrench for dismounting circular nut with tooth groove in airplane pipeline | |
| US7437904B2 (en) | Coldwork tool assembly | |
| CN210691814U (en) | Engine model tail spouts extending structure | |
| CN110774218B (en) | Integrated composite pipe metal joint connecting device | |
| CN206455095U (en) | The operated pressing tool of continuous pipe pit type female connector | |
| CN210958025U (en) | Motor shaft mechanism of main winding motor of horn tube | |
| CN219324685U (en) | Electric device for expanding end part of pipe fitting | |
| CN111015566A (en) | Plate-shaped bending type split unilateral bolt fastener mounting tool | |
| CN218398127U (en) | Building module connecting assembly suitable for multi-shape programming teaching robot | |
| CN218466742U (en) | Connecting piece for connecting building alloy pipes | |
| CN214329601U (en) | Steel bar lapping connector |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |