CN114289942A - Welding assembly process of all-welded fixed ball valve - Google Patents
Welding assembly process of all-welded fixed ball valve Download PDFInfo
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- CN114289942A CN114289942A CN202111645468.2A CN202111645468A CN114289942A CN 114289942 A CN114289942 A CN 114289942A CN 202111645468 A CN202111645468 A CN 202111645468A CN 114289942 A CN114289942 A CN 114289942A
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- 238000003466 welding Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000012545 processing Methods 0.000 claims abstract description 17
- 210000004907 gland Anatomy 0.000 claims description 38
- 238000003825 pressing Methods 0.000 claims description 19
- 238000007789 sealing Methods 0.000 claims description 12
- 238000003780 insertion Methods 0.000 claims description 6
- 230000037431 insertion Effects 0.000 claims description 6
- 238000003754 machining Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 230000013011 mating Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- KJLPSBMDOIVXSN-UHFFFAOYSA-N 4-[4-[2-[4-(3,4-dicarboxyphenoxy)phenyl]propan-2-yl]phenoxy]phthalic acid Chemical compound C=1C=C(OC=2C=C(C(C(O)=O)=CC=2)C(O)=O)C=CC=1C(C)(C)C(C=C1)=CC=C1OC1=CC=C(C(O)=O)C(C(O)=O)=C1 KJLPSBMDOIVXSN-UHFFFAOYSA-N 0.000 claims 1
- 238000012797 qualification Methods 0.000 abstract description 2
- 238000005520 cutting process Methods 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention discloses a welding assembly process of an all-welded fixed ball valve, which comprises the following steps: s1: processing the left valve body to obtain a left upper half hole and a left lower half hole, processing the right valve body to obtain a right upper half hole and a right lower half hole, installing the left valve seat assembly in the left valve body, installing the right valve seat assembly in the right valve body, and connecting the upper positioning shaft and the lower positioning shaft to the valve core; s2: assembling the left valve body, the right valve body and the valve core to enable the valve core to be assembled between the left valve body and the right valve body, enabling the left upper half hole and the right upper half hole to be respectively matched with the upper positioning shaft and enabling the left lower half hole and the right lower half hole to be respectively matched with the lower positioning shaft; s3: and welding a welding seam formed by splicing the left valve body and the right valve body. The invention can omit boring processing, thereby avoiding chips falling between the valve core and the valve body, improving the product quality and the qualification rate.
Description
Technical Field
The invention relates to a welding assembly process of an all-welded fixed ball valve.
Background
At present, in the manufacturing process of the all-welded fixed ball valve, components such as a valve core, a valve seat and the like need to be assembled between a left valve body and a right valve body, then the left valve body and the right valve body are welded together to form a whole valve, and then an upper mounting hole and a lower mounting hole are drilled in the whole valve. However, cutting chips are generated in the boring process, the cutting chips fall into the space between the valve core and the valve body and are difficult to clean, the cutting chips can abrade the valve core, the valve seat and the sealing ring on the valve seat, and the product quality is affected.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a welding assembly process of an all-welded fixed ball valve, which can save boring processing, further avoid chips falling between a valve core and the whole valve, improve the product quality and improve the qualification rate.
In order to solve the technical problems, the technical scheme of the invention is as follows: a welding assembly process for an all-welded fixed ball valve is implemented based on an upper positioning shaft, a lower positioning shaft, an upper tool and a lower tool;
the all-welded fixed ball valve comprises a left valve body, a right valve body, a left valve seat assembly, a right valve seat assembly, a valve core, an upper shaft sleeve assembly, a lower shaft sleeve assembly, a valve rod assembly and a lower bearing assembly;
the left seat assembly is adapted to be mounted in the left valve body and the right seat assembly is adapted to be mounted in the right valve body;
the left valve body and the right valve body are welded to form a valve whole;
the valve core is arranged in the valve whole body;
the upper shaft sleeve assembly is connected to the upper end part of the whole valve, and the lower shaft sleeve assembly is connected to the lower end part of the whole valve;
the valve rod assembly is arranged in the upper shaft sleeve assembly and is matched and connected with the upper end part of the valve core;
the lower bearing assembly is mounted in the lower bushing assembly and connected with the lower end of the valve core to support the valve core;
the process comprises the following steps:
s1: processing the upper end of the left valve body to obtain a left upper half hole matched with the upper positioning shaft, processing the lower end of the left valve body to obtain a left lower half hole matched with the lower positioning shaft, processing the upper end of the right valve body to obtain a right upper half hole matched with the upper positioning shaft, and processing the lower end of the right valve body to obtain a right lower half hole matched with the lower positioning shaft; installing the left valve seat assembly in the left valve body, installing the right valve seat assembly in the right valve body, connecting the upper positioning shaft to the upper end of the valve core, and connecting the lower positioning shaft to the lower end of the valve core;
s2: assembling the left valve body, the right valve body and the valve core to splice the left valve body and the right valve body, assembling the valve core between the left valve body and the right valve body, respectively matching the left upper half hole and the right upper half hole with the upper positioning shaft, and respectively matching the left lower half hole and the right lower half hole with the lower positioning shaft;
s3: welding a welding seam formed by splicing the left valve body and the right valve body so as to connect the left valve body and the right valve body to form the whole valve;
s4: removing the upper positioning shaft, splicing the upper half hole on the left side and the upper half hole on the right side to form an upper mounting hole, mounting the upper bushing assembly in the upper mounting hole, enabling the upper tool to penetrate through the upper mounting hole and be connected to the upper end part of the valve core, and enabling the upper tool to abut against the upper end of the upper bushing assembly and tightly press and fix the upper bushing assembly on the upper end part of the whole valve; removing the lower positioning shaft, splicing the left lower half hole and the right lower half hole to form a lower mounting hole, mounting the lower shaft sleeve assembly in the lower mounting hole, enabling the lower tool to penetrate through the lower mounting hole and be connected to the lower end part of the valve core, enabling the lower tool to abut against the lower end of the lower shaft sleeve assembly, tightly pressing and fixing the lower shaft sleeve assembly at the lower end part of the valve whole, and welding the upper shaft sleeve assembly and the lower shaft sleeve assembly on the valve whole;
s5: the upper tool is disassembled, the valve rod assembly is installed in the upper shaft sleeve assembly, and the valve rod assembly is connected with the upper end of the valve core in a matched mode; and disassembling the lower tool, mounting the lower bearing assembly in the lower shaft sleeve assembly and enabling the lower bearing assembly to be matched and connected with the lower end part of the valve core.
Furthermore, an upper positioning hole is formed in the upper end of the valve core, and a lower positioning hole is formed in the lower end of the valve core;
in step S1, the specific step of connecting the upper positioning shaft to the upper end portion of the valve body is:
inserting the lower end part of the upper positioning shaft into the upper positioning hole and locking and connecting the upper positioning shaft on the valve core through a bolt;
in step S1, the specific step of connecting the lower positioning shaft to the lower end portion of the valve body is:
and inserting the upper end part of the lower positioning shaft into the lower positioning hole and locking and connecting the lower positioning shaft to the valve core through a bolt.
In order to further improve the assembly position precision between the left valve body and the right valve body, any one of the left valve body and the right valve body is provided with an inserting notch;
the other one of the left valve body and the right valve body is provided with an inserting boss matched with the inserting notch;
in step S2, the insertion boss is inserted into the insertion groove opening when the left valve body and the right valve body are assembled so that the left valve body and the right valve body are spliced together.
Further providing detailed operation of step S4, where the upper tool includes an upper connection column, an upper gland and a first fastener;
the lower tool comprises a lower connecting column, a lower gland and a second fastener;
the upper shaft sleeve assembly comprises an upper sleeve body and an upper bushing;
the lower shaft sleeve assembly comprises a lower sleeve body and a lower bushing;
the specific operation steps of step S4 are:
removing the upper positioning shaft, penetrating the upper connecting column through the upper mounting hole and connecting the upper connecting column with the upper end part of the valve core, inserting the upper bushing into the upper mounting hole, sleeving the upper sleeve body on the upper end part of the upper bushing, abutting the upper gland on the upper end of the upper sleeve body, and locking the upper gland on the upper connecting column through the first fastening piece so that the upper gland can tightly press and fix the upper sleeve body and the upper bushing; the lower positioning shaft is detached, the lower connecting column penetrates through the lower mounting hole and is connected to the lower end portion of the valve core, the lower bushing is mounted in the lower mounting hole, the lower sleeve body is sleeved on the lower end portion of the lower bushing, the lower pressing cover abuts against the lower end of the lower sleeve body and is locked on the lower connecting column through the second fastening piece, so that the lower pressing cover can tightly press and fix the lower sleeve body and the lower bushing, and the upper sleeve body, the upper bushing, the lower sleeve body and the lower bushing are welded on the whole valve.
Further provided is a concrete structure of the first fastener and the second fastener, wherein the first fastener comprises a first screw and a first nut;
the lower end part of the first screw rod is in threaded connection with the upper connecting column;
the upper end part of the first screw penetrates through the upper gland;
the first nut is connected to the upper end part of the first screw rod and compresses the upper gland tightly;
the second fastener comprises a second screw and a second nut;
the upper end part of the second screw is in threaded connection with the lower connecting column;
the lower end part of the second screw penetrates through the lower gland;
the second nut is connected to the lower end of the second screw rod and abuts against the lower gland tightly.
Furthermore, an upper positioning hole is formed in the upper end of the valve core, and a lower positioning hole is formed in the lower end of the valve core;
in step S4, the specific step of connecting the upper connection column to the upper end portion of the valve body is:
inserting the lower end part of the upper connecting column into the upper positioning hole and locking and connecting the upper connecting column to the valve core through a bolt;
in step S4, the specific step of connecting the lower connection column to the lower end portion of the valve body is:
and inserting the upper end part of the lower connecting column into the lower positioning hole and locking and connecting the lower connecting column to the valve core through a bolt.
Furthermore, the all-welded fixed ball valve also comprises supporting legs;
in step S5, after the lower connection post, the lower gland and the second fastener in the lower tool are removed, the support leg is welded to the lower end of the lower sleeve body.
Further providing a specific installation step of a valve rod assembly, wherein the valve rod assembly comprises a valve rod, a sealing sleeve, four open rings, an open ring pressing sleeve and a top flange;
the upper end part of the valve core is provided with an upper positioning hole and a matching hole which is connected with the upper positioning hole and used for inserting the lower end part of the valve rod;
in step S5, the specific steps of mounting the valve stem assembly in the upper bushing assembly and connecting the valve stem assembly to the upper end of the valve core in a matching manner include:
inserting the lower end part of the valve rod into a matching hole in the valve core after penetrating the upper shaft sleeve assembly;
installing the seal cartridge between the valve stem and the upper bushing assembly and inserting the lower end of the seal cartridge into the upper locating hole;
installing the four open rings in the upper bushing assembly and abutting the four open rings against the upper end of the gland;
installing the open-loop pressing sleeve between the valve rod and the upper shaft sleeve assembly and enabling the open-loop pressing sleeve to abut against the inner peripheral wall of the four open loops;
connecting the top flange to the upper bushing assembly and pressing the top flange against the open-loop press bushing.
Further provided is a specific installation step of the lower support assembly, the lower support assembly including a support shaft and a bottom head;
the lower end part of the valve core is provided with a lower positioning hole;
in step S5, the specific steps of mounting the lower bearing assembly in the lower bushing assembly and mating the lower bearing assembly with the lower end of the spool are:
inserting the support shaft into the lower bushing assembly and inserting the upper end of the support shaft into the lower positioning hole;
and connecting the bottom cover on the lower shaft sleeve component in a threaded manner and propping against the lower end part of the supporting shaft.
Further, in step S1, the left upper half hole, the left lower half hole, the right upper half hole, and the right lower half hole are all obtained by finish machining.
After the technical scheme is adopted, the first half hole on the left side and the first half hole on the right side respectively with go up the positioning shaft cooperation, the first half hole on the left side with the first half hole on the right side respectively with lower positioning shaft cooperation can be upwards accurately injectd left side valve body with relative position between the right valve body, and then make the first half hole on the left side and the accurate concatenation in the first half hole on the right side form go up the mounting hole, make the first half hole on the left side with the accurate concatenation in the first half hole on the right side forms mounting hole down, and then improved the assembly precision of whole valve. Just will before the welding the first half hole in left side, the first half hole in right side and the first half hole in right side are processed out, then just will the left valve body with the welding of right valve body obtains the valve is whole, consequently obtains welding just need not be in the bore hole processing after the valve is whole, and then can not produce the smear metal, and then just can not have the smear metal between the whole valve and the case, has improved the quality of valve greatly, has improved the yields.
Drawings
FIG. 1 is a schematic view of steps S1 through S3 of the welding assembly process of an all-welded fixed ball valve of the present invention;
FIG. 2 is a schematic view of step S4 in the welding assembly process of the all-welded fixed ball valve of the present invention;
FIG. 3 is a schematic structural view of an all-welded fixed ball valve of the present invention;
FIG. 4 is a detail view of a portion of FIG. 3;
FIG. 5 is a schematic structural view of the left and right valve bodies of the present invention;
FIG. 6 is a schematic structural view of the valve cartridge of the present invention;
fig. 7 is a schematic structural diagram of a four-open loop of the present invention.
Detailed Description
In order that the present invention may be more readily and clearly understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
As shown in fig. 1 to 6, a welding assembly process for an all-welded fixed ball valve is implemented based on an upper positioning shaft 1, a lower positioning shaft 2, an upper tool 100 and a lower tool 200;
the all-welded fixed ball valve comprises a left valve body 3, a right valve body 4, a left valve seat assembly 5, a right valve seat assembly 6, a valve core 7, an upper bushing assembly 300, a lower bushing assembly 400, a valve rod assembly 500 and a lower bearing assembly 600;
the left seat assembly 5 is adapted to be mounted in the left valve body 3 and the right seat assembly 6 is adapted to be mounted in the right valve body 4;
the left valve body 3 and the right valve body 4 are welded to form a valve whole;
the valve core 7 is installed in the valve whole body;
the upper shaft sleeve assembly 300 is connected to the upper end part of the valve whole body, and the lower shaft sleeve assembly 400 is connected to the lower end part of the valve whole body;
the valve rod assembly 500 is installed in the upper bushing assembly 300 and is in fit connection with the upper end of the valve core 7;
the lower bearing assembly 600 is installed in the lower boss assembly 400 and connected to the lower end of the valve spool 7 to support the valve spool 7;
the process comprises the following steps:
s1: processing the upper end of the left valve body 3 to obtain a left upper half hole 8 matched with the upper positioning shaft 1, processing the lower end of the left valve body 3 to obtain a left lower half hole 9 matched with the lower positioning shaft 2, processing the upper end of the right valve body 4 to obtain a right upper half hole 10 matched with the upper positioning shaft 1, and processing the lower end of the right valve body 4 to obtain a right lower half hole 11 matched with the lower positioning shaft 2; mounting the left seat assembly 5 in the left valve body 3, mounting the right seat assembly 6 in the right valve body 4, connecting the upper positioning shaft 1 to the upper end of the spool 7, and connecting the lower positioning shaft 2 to the lower end of the spool 7;
s2: assembling the left valve body 3, the right valve body 4 and the valve core 7 to splice the left valve body 3 and the right valve body 4, assembling the valve core 7 between the left valve body 3 and the right valve body 4, respectively matching the left upper half hole 8 and the right upper half hole 10 with the upper positioning shaft 1, and respectively matching the left lower half hole 9 and the right lower half hole 11 with the lower positioning shaft 2;
s3: welding a welding seam formed by splicing the left valve body 3 and the right valve body 4 so as to connect the left valve body 3 and the right valve body 4 to form the whole valve;
s4: the upper positioning shaft 1 is disassembled, the upper left half hole 8 and the upper right half hole 10 are spliced to form an upper mounting hole, the upper bushing assembly 300 is mounted in the upper mounting hole, the upper tool 100 penetrates through the upper mounting hole and is connected to the upper end portion of the valve core 7, and the upper tool 100 abuts against the upper end of the upper bushing assembly 300 and tightly presses and fixes the upper bushing assembly 300 to the upper end portion of the whole valve; the lower positioning shaft 2 is disassembled, the left lower half hole 9 and the right lower half hole 11 are spliced to form a lower mounting hole, the lower shaft sleeve assembly 400 is mounted in the lower mounting hole, the lower tool 200 penetrates through the lower mounting hole and is connected to the lower end portion of the valve core 7, the lower tool 200 abuts against the lower end of the lower shaft sleeve assembly 400 and presses and fixes the lower shaft sleeve assembly 400 to the lower end portion of the valve whole body, and the upper shaft sleeve assembly 300 and the lower shaft sleeve assembly 400 are welded to the valve whole body;
s5: removing the upper tool 100, installing the valve rod assembly 500 in the upper bushing assembly 300, and enabling the valve rod assembly 500 to be matched and connected with the upper end part of the valve core 7; disassembling the lower tool 200, installing the lower bearing assembly 600 in the lower shaft sleeve assembly 400 and enabling the lower bearing assembly 600 to be matched and connected with the lower end part of the valve core 7; specifically, first hole 8 on the left side with first hole 10 on the right side respectively with go up the cooperation of location axle 1, first hole 9 on the left side with first hole 11 on the right side respectively with location axle 2 cooperation down can upwards be upwards pinpointed in circumference left side valve body 3 with relative position between the right valve body 4, and then make first hole 8 on the left side and the accurate concatenation in first hole 10 on the right side form go up the mounting hole, make first hole 9 on the left side with the accurate concatenation in first hole 11 on the right side forms mounting hole down, and then improved the assembly precision of whole valve to this technology easy operation easily realizes.
In step S1, the left upper half hole 8, the left lower half hole 9, the right upper half hole 10, and the right lower half hole 11 are machined, and then the left valve body 3 and the right valve body 4 are welded to obtain the valve whole body, so that the valve whole body is welded without boring, so that no cutting chips are generated, no cutting chips are generated between the valve whole body and the valve core 7, the valve quality is greatly improved, and the yield is improved.
In the present embodiment, the left upper half-hole 8, the left lower half-hole 9, the right upper half-hole 10 and the right lower half-hole 11 are finishing holes; the specific structures of the left valve seat assembly 5 and the right valve seat assembly 6 are well known in the art, and are not described in detail in this embodiment.
As shown in fig. 1 and 6, an upper positioning hole 12 is formed at the upper end of the valve core 7, and a lower positioning hole 13 is formed at the lower end of the valve core 7;
in step S1, the specific step of connecting the upper positioning shaft 1 to the upper end portion of the valve body 7 is:
inserting the lower end part of the upper positioning shaft 1 into the upper positioning hole 12 and locking and connecting the upper positioning shaft 1 to the valve core 7 through a bolt;
in step S1, the specific step of connecting the lower positioning shaft 2 to the lower end portion of the valve body 7 is:
and inserting the upper end part of the lower positioning shaft 2 into the lower positioning hole 13 and locking and connecting the lower positioning shaft 2 to the valve core 7 through a bolt.
As shown in fig. 5, a plug notch 14 is provided on any one of the left valve body 3 and the right valve body 4;
the other one of the left valve body 3 and the right valve body 4 is provided with an inserting boss 15 matched with the inserting notch 14;
in step S2, the insertion boss 15 is inserted into the insertion notch 14 when the left valve body 3 and the right valve body 4 are assembled so that the left valve body 3 and the right valve body 4 are spliced together.
As shown in fig. 1, 2, 5 and 6, the upper tooling 100 may include an upper connecting column 16, an upper gland 17 and a first fastener;
the lower tool 200 may include a lower connection column 18, a lower gland 19, and a second fastener;
the upper bushing assembly 300 may include an upper bushing body 20 and an upper bushing 21;
the lower bushing assembly 400 may include a lower bushing body 22 and a lower bushing 23;
the specific operation steps of step S4 are:
removing the upper positioning shaft 1, penetrating the upper connecting column 16 through the upper mounting hole and connecting the upper connecting column to the upper end of the valve core 7, inserting the upper bushing 21 into the upper mounting hole, sleeving the upper sleeve body 20 on the upper end of the upper bushing 21, abutting the upper gland 17 on the upper end of the upper sleeve body 20, and locking the upper gland 17 on the upper connecting column 16 through the first fastening piece so that the upper gland 17 compresses and fixes the upper sleeve body 20 and the upper bushing 21; the lower positioning shaft 2 is detached, the lower connecting column 18 penetrates through the lower mounting hole and is connected to the lower end portion of the valve core 7, the lower bushing 23 is mounted in the lower mounting hole, the lower bushing body 22 is sleeved on the lower end portion of the lower bushing 23, the lower gland 19 is abutted to the lower end portion of the lower bushing body 22, the lower gland 19 is locked on the lower connecting column 18 through the second fastening piece, the lower gland 19 enables the lower bushing body 22 and the lower bushing 23 to be pressed and fixed, and the upper bushing body 20, the upper bushing 21, the lower bushing body 22 and the lower bushing 23 are welded on the valve whole.
As shown in fig. 2, the first fastener may include a first threaded rod 24 and a first nut 25;
the lower end part of the first screw rod 24 is in threaded connection with the upper connecting column 16;
the upper end part of the first screw 24 passes through the upper gland 17;
the first nut 25 is connected to the upper end of the first screw 24 and presses the upper gland 17;
the second fastener may include a second screw 26 and a second nut 27;
the upper end part of the second screw 26 is in threaded connection with the lower connecting column 18;
the lower end of the second screw 26 passes through the lower gland 19;
the second nut 27 is connected to the lower end of the second screw 26 and abuts against the lower gland 19.
As shown in fig. 2 and 6, in step S4, the specific steps of connecting the upper connection column 16 to the upper end portion of the valve body 7 are:
inserting the lower end part of the upper connecting column 16 into the upper positioning hole 12 and locking the upper connecting column 16 on the valve core 7 through a bolt;
in step S4, the specific step of connecting the lower connection post 18 to the lower end portion of the valve body 7 is:
the upper end part of the lower connecting column 18 is inserted into the lower positioning hole 13, and the lower connecting column 18 is locked and connected on the valve core 7 through a bolt.
As shown in fig. 3, the all-welded fixed ball valve may further include a support leg 28;
in step S5, after removing the lower connection column 18, the lower gland 19 and the second fastener in the lower tooling 200, welding the support leg 28 to the lower end of the lower sleeve body 22; specifically, the first fastener is removed by removing the upper tool 100, and the upper gland 17 and the upper connecting column 16 are removed.
As shown in fig. 2-7, the valve stem assembly 500 may include a valve stem 29, a sealing sleeve 30, a four-open ring 31, an open ring pressing sleeve 32, and a top flange 33;
the upper end part of the valve core 7 is provided with an upper positioning hole 12 and a matching hole 34 which is connected with the upper positioning hole 12 and is used for inserting the lower end part of the valve rod 29, and the matching hole 34 is a square hole;
in step S5, the specific steps of mounting the valve stem assembly 500 in the upper bushing assembly 300 and connecting the valve stem assembly 500 to the upper end of the valve core 7 in a fitting manner include:
inserting the lower end of the valve rod 29 into the matching hole 34 in the valve core 7 after passing through the upper bushing assembly 300;
installing the sealing sleeve 30 between the valve stem 29 and the upper bushing assembly 300 and inserting the lower end of the sealing sleeve 30 into the upper positioning hole 12;
mounting said quad ring 31 in said upper bushing assembly 300 with said quad ring 31 against the upper end of said sealing boot 30;
installing said open ring pressing sleeve 32 between said valve stem 29 and said upper bushing assembly 300 and pressing said open ring pressing sleeve 32 against the inner peripheral wall of said four open rings 31;
attaching said top flange 33 to said upper bushing assembly 300 and pressing said top flange 33 against said open ring pressing bushing 32; specifically, the top flange 33 is also provided with a sealing filler; in this embodiment, the specific structures of the valve rod 29, the sealing sleeve 30, the four-open ring 31, the open ring pressing sleeve 32 and the top flange 33 are well known in the prior art, and no detailed description is given in this embodiment, and in this embodiment, the top flange 33 is connected to the upper sleeve body 20 through a bolt.
As shown in fig. 2, 3, 5, and 6, the lower support assembly 600 may include a support shaft 35 and a bottom cap 36;
the lower end part of the valve core 7 is provided with a lower positioning hole 13;
in step S5, the specific steps of mounting the lower bearing assembly 600 in the lower bushing assembly 400 and mating the lower bearing assembly 600 with the lower end of the spool 7 are:
inserting the support shaft 35 into the lower boss assembly 400 and inserting the upper end portion of the support shaft 35 into the lower positioning hole 13;
screwing the bottom cover 36 on the lower boss assembly 400 against the lower end portion of the support shaft 35; in this embodiment, the bottom cap 36 is screwed to the lower case body 22.
In step S1, the left upper half-hole 8, the left lower half-hole 9, the right upper half-hole 10 and the right lower half-hole 11 are all obtained by finish machining; specifically, the left upper half-hole 8, the left lower half-hole 9, the right upper half-hole 10 and the right lower half-hole 11 can be obtained by finish machining in a machining center.
The working principle of the invention is as follows:
The above embodiments are described in further detail to solve the technical problems, technical solutions and advantages of the present invention, and it should be understood that the above embodiments are only examples of the present invention and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A welding assembly process for an all-welded fixed ball valve is characterized in that,
the method is implemented based on an upper positioning shaft (1), a lower positioning shaft (2), an upper tool (100) and a lower tool (200);
the all-welded fixed ball valve comprises a left valve body (3), a right valve body (4), a left valve seat assembly (5), a right valve seat assembly (6), a valve core (7), an upper bushing assembly (300), a lower bushing assembly (400), a valve rod assembly (500) and a lower bearing assembly (600);
the left seat assembly (5) is adapted to be mounted in the left valve body (3) and the right seat assembly (6) is adapted to be mounted in the right valve body (4);
the left valve body (3) and the right valve body (4) are welded to form a valve whole;
the valve core (7) is installed in the valve whole body;
the upper shaft sleeve assembly (300) is connected to the upper end part of the valve whole body, and the lower shaft sleeve assembly (400) is connected to the lower end part of the valve whole body;
the valve rod assembly (500) is arranged in the upper shaft sleeve assembly (300) and is matched and connected with the upper end part of the valve core (7);
the lower bearing assembly (600) is installed in the lower bushing assembly (400) and connected with the lower end of the valve core (7) to support the valve core (7);
the process comprises the following steps:
s1: processing the upper end of the left valve body (3) to obtain a left upper half hole (8) matched with the upper positioning shaft (1), processing the lower end of the left valve body (3) to obtain a left lower half hole (9) matched with the lower positioning shaft (2), processing the upper end of the right valve body (4) to obtain a right upper half hole (10) matched with the upper positioning shaft (1), and processing the lower end of the right valve body (4) to obtain a right lower half hole (11) matched with the lower positioning shaft (2); mounting the left valve seat assembly (5) in the left valve body (3), mounting the right valve seat assembly (6) in the right valve body (4), connecting the upper positioning shaft (1) to the upper end of the valve core (7), and connecting the lower positioning shaft (2) to the lower end of the valve core (7);
s2: assembling the left valve body (3), the right valve body (4) and the valve core (7) to splice the left valve body (3) and the right valve body (4), assembling the valve core (7) between the left valve body (3) and the right valve body (4), respectively matching the left upper half hole (8) and the right upper half hole (10) with the upper positioning shaft (1), and respectively matching the left lower half hole (9) and the right lower half hole (11) with the lower positioning shaft (2);
s3: welding a welding seam formed by splicing the left valve body (3) and the right valve body (4) so as to connect the left valve body (3) and the right valve body (4) to form the whole valve;
s4: the upper positioning shaft (1) is disassembled, the upper left half hole (8) and the upper right half hole (10) are spliced to form an upper mounting hole, the upper bushing assembly (300) is mounted in the upper mounting hole, the upper tool (100) penetrates through the upper mounting hole and is connected to the upper end of the valve core (7), and the upper tool (100) abuts against the upper end of the upper bushing assembly (300) and tightly presses and fixes the upper bushing assembly (300) to the upper end of the whole valve; the lower positioning shaft (2) is disassembled, the left lower half hole (9) and the right lower half hole (11) are spliced to form a lower mounting hole, the lower shaft sleeve assembly (400) is mounted in the lower mounting hole, the lower tool (200) penetrates through the lower mounting hole and is connected to the lower end part of the valve core (7), the lower tool (200) abuts against the lower end of the lower shaft sleeve assembly (400) and presses and fixes the lower shaft sleeve assembly (400) to the lower end part of the valve whole body, and the upper shaft sleeve assembly (300) and the lower shaft sleeve assembly (400) are welded on the valve whole body;
s5: the upper tool (100) is disassembled, the valve rod assembly (500) is installed in the upper shaft sleeve assembly (300), and the valve rod assembly (500) is matched and connected with the upper end part of the valve core (7); and (3) dismantling the lower tool (200), installing the lower bearing assembly (600) in the lower shaft sleeve assembly (400) and enabling the lower bearing assembly (600) to be matched and connected with the lower end part of the valve core (7).
2. The welding assembly process of an all-welded fixed ball valve according to claim 1,
an upper positioning hole (12) is formed in the upper end of the valve core (7), and a lower positioning hole (13) is formed in the lower end of the valve core (7);
in step S1, the specific step of connecting the upper positioning shaft (1) to the upper end portion of the valve body (7) is:
inserting the lower end part of the upper positioning shaft (1) into the upper positioning hole (12) and locking and connecting the upper positioning shaft (1) to the valve core (7) through a bolt;
in step S1, the specific step of connecting the lower positioning shaft (2) to the lower end portion of the valve body (7) is:
and inserting the upper end part of the lower positioning shaft (2) into the lower positioning hole (13) and locking and connecting the lower positioning shaft (2) to the valve core (7) through a bolt.
3. The welding assembly process of an all-welded fixed ball valve according to claim 1,
a plug-in notch (14) is arranged on any one of the left valve body (3) and the right valve body (4);
the other one of the left valve body (3) and the right valve body (4) is provided with an inserting boss (15) matched with the inserting notch (14);
in step S2, the insertion boss (15) is inserted into the insertion groove opening (14) when the left valve body (3) and the right valve body (4) are assembled, so that the left valve body (3) and the right valve body (4) are spliced together.
4. The welding assembly process of an all-welded fixed ball valve according to claim 1,
the upper tool (100) comprises an upper connecting column (16), an upper gland (17) and a first fastener;
the lower tool (200) comprises a lower connecting column (18), a lower gland (19) and a second fastener;
the upper shaft sleeve assembly (300) comprises an upper sleeve body (20) and an upper bushing (21);
the lower shaft sleeve assembly (400) comprises a lower sleeve body (22) and a lower bushing (23);
the specific operation steps of step S4 are:
the upper positioning shaft (1) is detached, the upper connecting column (16) penetrates through the upper mounting hole and is connected to the upper end of the valve core (7), the upper bushing (21) is inserted into the upper mounting hole, the upper sleeve body (20) is sleeved on the upper end of the upper bushing (21), the upper gland (17) is abutted against the upper end of the upper sleeve body (20), and the upper gland (17) is locked on the upper connecting column (16) through the first fastening piece, so that the upper gland (17) compresses and fixes the upper sleeve body (20) and the upper bushing (21); demolish down location axle (2), will lower spliced pole (18) pass down the mounting hole and be connected the lower tip of case (7), will lower bush (23) are installed in the mounting hole down, will the cover body (22) cover is in down the lower tip of bush (23), will gland (19) support down the lower extreme of the cover body (22) and pass through the second fastener will gland (19) lock down on spliced pole (18) so that gland (19) will down the cover body (22) with lower bush (23) compress tightly fixedly, will the upper cover body (20), upper bush (21), the cover body (22) and lower bush (23) weld the valve is whole.
5. The welding assembly process of an all-welded fixed ball valve according to claim 4,
the first fastener comprises a first screw (24) and a first nut (25);
the lower end part of the first screw rod (24) is in threaded connection with the upper connecting column (16);
the upper end part of the first screw (24) penetrates through the upper gland (17);
the first nut (25) is connected to the upper end part of the first screw rod (24) and compresses the upper gland (17);
the second fastener comprises a second screw (26) and a second nut (27);
the upper end part of the second screw rod (26) is in threaded connection with the lower connecting column (18);
the lower end part of the second screw rod (26) penetrates through the lower gland (19);
the second nut (27) is connected to the lower end of the second screw rod (26) and tightly abuts against the lower gland (19).
6. The welding assembly process of an all-welded fixed ball valve according to claim 4,
an upper positioning hole (12) is formed in the upper end of the valve core (7), and a lower positioning hole (13) is formed in the lower end of the valve core (7);
in step S4, the specific step of connecting the upper connection column (16) to the upper end portion of the valve body (7) is:
inserting the lower end part of the upper connecting column (16) into the upper positioning hole (12) and locking and connecting the upper connecting column (16) to the valve core (7) through a bolt;
in step S4, the specific step of connecting the lower connection column (18) to the lower end portion of the valve body (7) is:
and inserting the upper end part of the lower connecting column (18) into the lower positioning hole (13) and locking and connecting the lower connecting column (18) to the valve core (7) through a bolt.
7. The welding assembly process of an all-welded fixed ball valve according to claim 4,
the all-welded fixed ball valve also comprises a supporting leg (28);
in step S5, after the lower connection column (18), the lower gland (19), and the second fastener in the lower tool (200) are removed, the support leg (28) is welded to the lower end of the lower sleeve body (22).
8. The welding assembly process of an all-welded fixed ball valve according to claim 1,
the valve rod assembly (500) comprises a valve rod (29), a sealing sleeve (30), four open rings (31), an open ring pressing sleeve (32) and a top flange (33);
the upper end part of the valve core (7) is provided with an upper positioning hole (12) and a matching hole (34) which is connected with the upper positioning hole (12) and is used for inserting the lower end part of the valve rod (29);
in step S5, the specific steps of mounting the valve stem assembly (500) in the upper bushing assembly (300) and connecting the valve stem assembly (500) and the upper end of the valve core (7) in a matching manner are as follows:
inserting the lower end part of the valve rod (29) into a matching hole (34) in the valve core (7) after penetrating the upper shaft sleeve assembly (300);
-mounting the sealing sleeve (30) between the valve stem (29) and the upper sleeve assembly (300) and inserting the lower end of the sealing sleeve (30) into the upper positioning hole (12);
-mounting said four-open ring (31) in said upper bushing assembly (300) and abutting said four-open ring (31) against the upper end of said sealing sleeve (30);
mounting the open-ring pressing sleeve (32) between the valve rod (29) and the upper bushing assembly (300) and pressing the open-ring pressing sleeve (32) against the inner peripheral wall of the four open rings (31);
connecting the top flange (33) to the upper bushing assembly (300) and pressing the top flange (33) against the open ring press bushing (32).
9. The welding assembly process of an all-welded fixed ball valve according to claim 1,
the lower bearing assembly (600) comprises a support shaft (35) and a bottom cover (36);
the lower end part of the valve core (7) is provided with a lower positioning hole (13);
in step S5, the specific steps of mounting the lower bearing assembly (600) in the lower bushing assembly (400) and mating the lower bearing assembly (600) with the lower end of the spool (7) are:
inserting the support shaft (35) into the lower boss assembly (400) and inserting an upper end portion of the support shaft (35) into the lower positioning hole (13);
and screwing the bottom cover (36) on the lower shaft sleeve assembly (400) and abutting against the lower end part of the support shaft (35).
10. The welding assembly process of an all-welded fixed ball valve according to claim 1,
in step S1, the left upper half hole (8), the left lower half hole (9), the right upper half hole (10), and the right lower half hole (11) are all obtained by finish machining.
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