CN114289942B - 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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- CN114289942B CN114289942B CN202111645468.2A CN202111645468A CN114289942B CN 114289942 B CN114289942 B CN 114289942B CN 202111645468 A CN202111645468 A CN 202111645468A CN 114289942 B CN114289942 B CN 114289942B
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- 238000003466 welding Methods 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 25
- 210000004907 gland Anatomy 0.000 claims description 43
- 238000003825 pressing Methods 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 9
- 238000003780 insertion Methods 0.000 claims description 6
- 230000037431 insertion Effects 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000012545 processing Methods 0.000 abstract description 8
- 238000005520 cutting process Methods 0.000 abstract description 2
- 238000012797 qualification Methods 0.000 abstract description 2
- 230000013011 mating Effects 0.000 description 3
- 238000012856 packing Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 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
- 230000000149 penetrating effect 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 a left upper half hole and a left lower half hole on the left valve body, processing a right upper half hole and a right lower half hole on the right valve body, 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 on the valve core; s2: assembling the left valve body, the right valve body and the valve core so that the valve core is assembled between the left valve body and the right valve body, the left upper half hole and the right upper half hole are respectively matched with the upper positioning shaft, and the left lower half hole and the right lower half hole are 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 cutting chips from falling between the valve core and the whole valve, 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 all-welded fixed ball valves, components such as a valve core, a valve seat and the like are required 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 valve whole, and then an upper mounting hole and a lower mounting hole are bored on the valve whole. However, chips are generated in the boring process and fall into the valve core and the whole valve body, so that the chips are difficult to clean, and the chips can wear the valve core, the valve seat and the sealing rings on the valve seat, so that the product quality is affected.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a welding assembly process of an all-welded fixed ball valve, which can omit boring processing, further avoid cutting chips from 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 of 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 supporting assembly;
the left valve seat assembly is adapted to be mounted in the left valve body, and the right valve 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 installed in the valve body;
the upper shaft sleeve assembly is connected to the upper end part of the valve body, and the lower shaft sleeve assembly is connected to the lower end part of the valve body;
the valve rod assembly is arranged in the upper shaft sleeve assembly and is connected with the upper end part of the valve core in a matching way;
the lower bearing assembly is arranged in the lower shaft sleeve assembly and connected with the lower end part of the valve core so as to support the valve core;
the process comprises the following steps:
s1: processing an upper half hole on the left side, which is matched with the upper positioning shaft, on the upper end part of the left valve body, processing a lower half hole on the left side, which is matched with the lower positioning shaft, on the lower end part of the left valve body, processing a right upper half hole on the upper end part of the right valve body, which is matched with the upper positioning shaft, and processing a right lower half hole on the lower end part of the right valve body, which is matched with the lower positioning shaft; the left valve seat assembly is installed in the left valve body, the right valve seat assembly is installed in the right valve body, the upper positioning shaft is connected to the upper end part of the valve core, and the lower positioning shaft is connected to the lower end part of the valve core;
s2: assembling the left valve body, the right valve body and the valve core so as 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, enabling the left upper half hole and the right upper half hole to be matched with the upper positioning shaft respectively, and enabling the left lower half hole and the right lower half hole to be matched with the lower positioning shaft respectively;
s3: welding a welding seam formed by splicing the left valve body and the right valve body so that the left valve body and the right valve body are connected to form a valve whole;
s4: the upper positioning shaft is removed, the left upper half hole and the right upper half hole are spliced to form an upper mounting hole, the upper shaft sleeve assembly is mounted in the upper mounting hole, the upper tool penetrates through the upper mounting hole and is connected to the upper end part of the valve core, and the upper tool abuts against the upper end of the upper shaft sleeve assembly and tightly presses and fixes the upper shaft sleeve assembly at the upper end part of the valve body; the lower positioning shaft is removed, the left lower half hole and the right lower half hole are spliced to form a lower mounting hole, the lower shaft sleeve assembly is mounted in the lower mounting hole, the lower fixture penetrates through the lower mounting hole and is connected to the lower end part of the valve core, the lower fixture abuts against the lower end of the lower shaft sleeve assembly, the lower shaft sleeve assembly is pressed and fixed to the lower end part of the valve body, and the upper shaft sleeve assembly and the lower shaft sleeve assembly are welded to the valve body;
s5: the upper tool is removed, the valve rod assembly is installed in the upper shaft sleeve assembly, and the valve rod assembly is in matched connection with the upper end part of the valve core; and removing the lower tool, installing the lower supporting assembly in the lower shaft sleeve assembly, and enabling the lower supporting assembly to be in matched connection with the lower end part of the valve core.
Further, an upper positioning hole is formed in the upper end portion of the valve core, and a lower positioning hole is formed in the lower end portion of the valve core;
in step S1, the specific step of connecting the upper positioning shaft to the upper end portion of the valve element is as follows:
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 element is as follows:
the upper end part of the lower positioning shaft is inserted into the lower positioning hole, and the lower positioning shaft is locked and connected on 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 a splicing notch;
a plug boss matched with the plug notch is arranged on the other one of the left valve body and the right valve body;
in step S2, the insertion boss is inserted into the insertion slot 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 provided is a detailed operation of step S4, the upper tooling including an upper connecting post, 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 the step S4 are as follows:
removing the upper positioning shaft, enabling the upper connecting column to penetrate through the upper mounting hole and be connected to the upper end part of the valve core, enabling the upper bushing to be inserted into the upper mounting hole, enabling the upper sleeve body to be sleeved on the upper end part of the upper bushing, enabling the upper gland to be abutted against the upper end of the upper sleeve body, and enabling the upper gland to be locked 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; dismantling the lower positioning shaft, enabling the lower connecting column to penetrate through the lower mounting hole and be connected with the lower end part of the valve core, enabling the lower bushing to be mounted in the lower mounting hole, enabling the lower sleeve body to be sleeved on the lower end part of the lower bushing, enabling the lower gland to be abutted to the lower end of the lower sleeve body and locked on the lower connecting column through the second fastening piece, enabling the lower gland to tightly press and fix the lower sleeve body and the lower bushing, and enabling the upper sleeve body, the upper bushing, the lower sleeve body and the lower bushing to be welded on the valve.
Further provided is a specific structure of the first fastener and the second fastener, the first fastener comprising a first threaded rod and a first nut;
the lower end part of the first screw rod is connected to the upper connecting column in a threaded manner;
the upper end part of the first screw rod passes through the upper gland;
the first nut is connected to the upper end part of the first screw rod and compresses the upper gland;
the second fastener comprises a second screw and a second nut;
the upper end part of the second screw rod is connected to the lower connecting column in a threaded manner;
the lower end part of the second screw rod passes through the lower gland;
the second nut is connected to the lower end of the second screw rod and abuts against the lower gland.
Further, an upper positioning hole is formed in the upper end portion of the valve core, and a lower positioning hole is formed in the lower end portion of the valve core;
in step S4, the specific step of connecting the upper connecting post to the upper end portion of the valve element is as follows:
inserting the lower end part of the upper connecting column into the upper positioning hole and locking and connecting the upper connecting column on the valve core through a bolt;
in step S4, the specific step of connecting the lower connecting post to the lower end portion of the valve element is as follows:
the upper end part of the lower connecting column is inserted into the lower positioning hole, and the lower connecting column is locked and connected on the valve core through a bolt.
Further, the all-welded fixed ball valve also comprises supporting feet;
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 portion of the lower sleeve body.
The method further provides a specific installation step of a valve rod assembly, wherein the valve rod assembly comprises a valve rod, a sealing sleeve, a four-open ring, an open-loop 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 is used for inserting the lower end part of the valve rod;
in step S5, the specific steps of installing the valve rod assembly in the upper shaft sleeve assembly and connecting the valve rod assembly with the upper end of the valve core in a matching manner are as follows:
inserting the lower end of the valve rod into a matching hole in the valve core after penetrating through the upper shaft sleeve assembly;
installing the gland between the valve stem and the upper sleeve assembly and inserting the lower end of the gland into the upper locating hole;
installing the four-way ring in the upper shaft sleeve assembly and enabling the four-way ring to prop against the upper end part of the sealing sleeve;
the open-loop pressing sleeve is arranged between the valve rod and the upper shaft sleeve assembly and is abutted against the inner peripheral wall of the four-way ring;
and connecting the top flange to the upper shaft sleeve assembly and enabling the top flange to press the open-loop pressing sleeve.
Further provided is a specific mounting step of the lower bearing assembly comprising a support shaft and a bottom cover;
the lower end part of the valve core is provided with a lower positioning hole;
in step S5, the specific steps of installing the lower bearing assembly in the lower sleeve assembly and connecting the lower bearing assembly and the lower end portion of the valve core in a matching manner are as follows:
inserting the support shaft into the lower shaft sleeve assembly and inserting an upper end portion of the support shaft into the lower positioning hole;
and the bottom cover is in threaded connection with the lower shaft sleeve assembly and abuts 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 finishing.
After the technical scheme is adopted, the left upper half hole and the right upper half hole are respectively matched with the upper positioning shaft, the left lower half hole and the right lower half hole are respectively matched with the lower positioning shaft, the relative positions between the left valve body and the right valve body can be accurately limited in the circumferential direction, then the left upper half hole and the right upper half hole are accurately spliced to form the upper mounting hole, the left lower half hole and the right lower half hole are accurately spliced to form the lower mounting hole, and the assembly precision of the whole valve is improved. The left upper half hole, the left lower half hole, the right upper half hole and the right lower half hole are machined before welding, and then the left valve body and the right valve body are welded to obtain the whole valve, so that the whole valve is welded to obtain the whole valve, and then the whole valve is not required to be bored and is not chipped, and no chippings exist between the whole valve and the valve core, so that the quality of the valve is greatly improved, and the yield is improved.
Drawings
FIG. 1 is a schematic view of steps S1 to S3 in the welding assembly process of the 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 view of the structure of an all-welded, fixed ball valve of the present invention;
FIG. 4 is a partial detail of FIG. 3;
FIG. 5 is a schematic view of the structure of the left and right valve bodies of the present invention;
FIG. 6 is a schematic view of the valve core of the present invention;
fig. 7 is a schematic diagram of a four-ring structure according to the present invention.
Detailed Description
In order that the invention may be more readily understood, a more particular description of the invention 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 of 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 shaft sleeve assembly 300, a lower shaft sleeve assembly 400, a valve rod assembly 500 and a lower supporting assembly 600;
the left valve seat assembly 5 is adapted to be installed in the left valve body 3, and the right valve seat assembly 6 is adapted to be installed 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;
the upper sleeve assembly 300 is connected to the upper end of the valve body, and the lower sleeve assembly 400 is connected to the lower end of the valve body;
the valve rod assembly 500 is installed in the upper shaft sleeve assembly 300 and is connected with the upper end part of the valve core 7 in a matching way;
the lower bearing assembly 600 is installed in the lower bushing assembly 400 and connected with the lower end portion of the valve cartridge 7 to support the valve cartridge 7;
the process comprises the following steps:
s1: a left upper half hole 8 matched with the upper positioning shaft 1 is formed in the upper end part of the left valve body 3, a left lower half hole 9 matched with the lower positioning shaft 2 is formed in the lower end part of the left valve body 3, a right upper half hole 10 matched with the upper positioning shaft 1 is formed in the upper end part of the right valve body 4, and a right lower half hole 11 matched with the lower positioning shaft 2 is formed in the lower end part of the right valve body 4; 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 portion of the valve spool 7, and connecting the lower positioning shaft 2 to the lower end portion of the valve spool 7;
s2: assembling the left valve body 3, the right valve body 4 and the valve core 7 so as 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, enabling the left upper half hole 8 and the right upper half hole 10 to be matched with the upper positioning shaft 1 respectively, and enabling the left lower half hole 9 and the right lower half hole 11 to be matched with the lower positioning shaft 2 respectively;
s3: welding a welding seam formed by splicing the left valve body 3 and the right valve body 4 so that the left valve body 3 and the right valve body 4 are connected to form a valve whole;
s4: removing the upper positioning shaft 1, splicing the left upper half hole 8 and the right upper half hole 10 to form an upper mounting hole, mounting the upper shaft sleeve assembly 300 in the upper mounting hole, enabling the upper tool 100 to pass through the upper mounting hole and be connected with the upper end part of the valve core 7, enabling the upper tool 100 to prop against the upper end of the upper shaft sleeve assembly 300 and tightly press and fix the upper shaft sleeve assembly 300 on the upper end part of the valve body; removing the lower positioning shaft 2, splicing the left lower half hole 9 and the right lower half hole 11 to form a lower mounting hole, mounting the lower shaft sleeve assembly 400 in the lower mounting hole, enabling the lower tool 200 to pass through the lower mounting hole and be connected with the lower end part of the valve core 7, enabling the lower tool 200 to prop against the lower end of the lower shaft sleeve assembly 400 and tightly press and fix the lower shaft sleeve assembly 400 on the lower end part of the valve body, and welding the upper shaft sleeve assembly 300 and the lower shaft sleeve assembly 400 on the valve body;
s5: removing the upper tool 100, installing the valve rod assembly 500 in the upper shaft sleeve assembly 300, and enabling the valve rod assembly 500 to be in matched connection with the upper end part of the valve core 7; removing the lower tool 200, installing the lower support assembly 600 in the lower shaft sleeve assembly 400 and enabling the lower support assembly 600 to be in matched connection with the lower end part of the valve core 7; specifically, the left side upper half hole 8 and the right side upper half hole 10 are respectively matched with the upper positioning shaft 1, the left side lower half hole 9 and the right side lower half hole 11 are respectively matched with the lower positioning shaft 2, the relative position between the left valve body 3 and the right valve body 4 can be accurately limited in the circumferential direction, the left side upper half hole 8 and the right side upper half hole 10 are accurately spliced to form the upper mounting hole, the left side lower half hole 9 and the right side lower half hole 11 are accurately spliced to form the lower mounting hole, and therefore the assembly precision of the whole valve is improved.
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 whole valve, so that boring is not needed after the whole valve is obtained by welding, chips are not generated between the whole valve and the valve core 7, the quality of the valve is greatly improved, and the yield is improved.
In this 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 all finish holes; the specific structures of the left valve seat assembly 5 and the right valve seat assembly 6 are well known to those skilled 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 element 7 is as follows:
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 on the valve core 7 through bolts;
in step S1, the specific step of connecting the lower positioning shaft 2 to the lower end portion of the valve element 7 is as follows:
the upper end of the lower positioning shaft 2 is inserted into the lower positioning hole 13 and the lower positioning shaft 2 is locked and connected to the valve core 7 by a bolt.
As shown in fig. 5, any one of the left valve body 3 and the right valve body 4 is provided with a plug notch 14;
the other one of the left valve body 3 and the right valve body 4 is provided with a plug boss 15 which is matched with the plug notch 14;
in step S2, the insertion boss 15 is inserted into the insertion slot 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 tool 100 may include an upper connecting post 16, an upper gland 17, and a first fastener;
the lower tooling 200 may include a lower connecting post 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 the step S4 are as follows:
removing the upper positioning shaft 1, enabling the upper connecting column 16 to pass through the upper mounting hole and be connected with the upper end part of the valve core 7, enabling the upper bushing 21 to be inserted into the upper mounting hole, enabling the upper sleeve body 20 to be sleeved on the upper end part of the upper bushing 21, enabling the upper gland 17 to abut against the upper end of the upper sleeve body 20, and enabling the upper gland 17 to be locked on the upper connecting column 16 through the first fastening piece so as to enable the upper gland 17 to tightly press and fix the upper sleeve body 20 and the upper bushing 21; the lower positioning shaft 2 is removed, the lower connecting post 18 passes through the lower mounting hole and is connected to the lower end part of the valve core 7, the lower bushing 23 is mounted in the lower mounting hole, the lower sleeve 22 is sleeved on the lower end part of the lower bushing 23, the lower gland 19 is abutted against the lower end of the lower sleeve 22, and the lower gland 19 is locked on the lower connecting post 18 through the second fastening piece, so that the lower gland 19 tightly presses and fixes the lower sleeve 22 and the lower bushing 23, and the upper sleeve 20, the upper bushing 21, the lower sleeve 22 and the lower bushing 23 are welded on the whole valve.
As shown in fig. 2, the first fastener may include a first screw 24 and a first nut 25;
the lower end of the first screw 24 is screwed to the upper connecting column 16;
the upper end 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 of the second screw 26 is screwed on 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 step of connecting the upper connecting post 16 to the upper end portion of the valve body 7 is as follows:
inserting the lower end of the upper connecting post 16 into the upper positioning hole 12 and locking and connecting the upper connecting post 16 to the valve core 7 by bolts;
in step S4, the specific step of connecting the lower connecting post 18 to the lower end portion of the valve element 7 is as follows:
the upper end of the lower connecting post 18 is inserted into the lower positioning hole 13 and the lower connecting post 18 is lockingly connected to the valve spool 7 by a bolt.
As shown in fig. 3, the all-welded, fixed ball valve may also include support feet 28;
in step S5, after removing the lower connecting post 18, the lower gland 19 and the second fastener in the lower tool 200, the supporting leg 28 is welded to the lower end portion of the lower sleeve 22; specifically, the first fastening member is removed by removing the upper tool 100, and the upper gland 17 and the upper connecting post 16 are removed.
As shown in fig. 2 to 7, the valve rod assembly 500 may include a valve rod 29, a sealing sleeve 30, a four-open ring 31, an open-loop 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 installing the valve stem assembly 500 in the upper sleeve assembly 300 and connecting the valve stem assembly 500 to the upper end portion of the valve core 7 in a mating manner are as follows:
inserting the lower end of the valve stem 29 through the upper sleeve assembly 300 and into the mating hole 34 in the valve core 7;
installing the packing 30 between the valve stem 29 and the upper bushing assembly 300 and inserting the lower end portion of the packing 30 into the upper positioning hole 12;
mounting the four-way ring 31 in the upper sleeve assembly 300 and abutting the four-way ring 31 against the upper end of the sealing sleeve 30;
installing the open-loop pressing sleeve 32 between the valve stem 29 and the upper sleeve assembly 300 and causing the open-loop pressing sleeve 32 to abut against the inner peripheral wall of the quarter-turn ring 31;
attaching the top flange 33 to the upper bushing assembly 300 such that the top flange 33 presses against the open-loop press jacket 32; specifically, a sealing filler is also installed in the top flange 33; in this embodiment, the specific structures of the valve rod 29, the sealing sleeve 30, the four open rings 31, the open ring pressing sleeve 32 and the top flange 33 are all well known in the art, and are not described in detail in this embodiment, and in this embodiment, the top flange 33 is connected to the upper sleeve body 20 through bolts.
As shown in fig. 2, 3, 5, and 6, the lower bearing assembly 600 may include 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 installing the lower bearing assembly 600 in the lower sleeve assembly 400 and connecting the lower bearing assembly 600 to the lower end portion of the valve core 7 in a mating manner are as follows:
inserting the support shaft 35 into the lower bushing assembly 400 and inserting an upper end portion of the support shaft 35 into the lower positioning hole 13;
screwing the bottom cap 36 onto the lower sleeve assembly 400 and against the lower end of the support shaft 35; in this embodiment, the bottom cap 36 is threadably coupled to the lower housing 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 may be finish-machined in a machining center.
The working principle of the invention is as follows:
the left side upper half hole 8 and the right side upper half hole 10 respectively cooperate with the upper positioning shaft 1, the left side lower half hole 9 and the right side lower half hole 11 respectively cooperate with the lower positioning shaft 2, the relative position between the left valve body 3 and the right valve body 4 can be accurately limited in the circumferential direction, and then the left side upper half hole 8 and the right side upper half hole 10 are accurately spliced to form the upper mounting hole, so that the left side lower half hole 9 and the right side lower half hole 11 are accurately spliced to form the lower mounting hole, and the assembly precision of the whole valve is further improved. Before welding, 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 whole valve, so that boring is not needed after the whole valve is obtained by welding, chips are not generated between the whole valve and the valve core 7, the quality of the valve is greatly improved, and the yield is improved.
The technical problems, technical solutions and advantageous effects solved by the present invention have been further described in detail in the above-described embodiments, and it should be understood that the above-described embodiments are only illustrative of the present invention and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the scope of protection of the present invention.
Claims (10)
1. A welding assembly process of 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 shaft sleeve assembly (300), a lower shaft sleeve assembly (400), a valve rod assembly (500) and a lower supporting assembly (600);
-said left valve seat assembly (5) being adapted to be mounted in said left valve body (3), said right valve seat assembly (6) being adapted to be mounted in said 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;
the upper shaft sleeve assembly (300) is connected to the upper end part of the valve body, and the lower shaft sleeve assembly (400) is connected to the lower end part of the valve body;
the valve rod assembly (500) is arranged in the upper shaft sleeve assembly (300) and is connected with the upper end part of the valve core (7) in a matching way;
the lower bearing assembly (600) is installed in the lower shaft sleeve assembly (400) and is connected with the lower end part of the valve core (7) to support the valve core (7);
the process comprises the following steps:
s1: a left upper half hole (8) matched with the upper positioning shaft (1) is formed in the upper end part of the left valve body (3), a left lower half hole (9) matched with the lower positioning shaft (2) is formed in the lower end part of the left valve body (3), a right upper half hole (10) matched with the upper positioning shaft (1) is formed in the upper end part of the right valve body (4), and a right lower half hole (11) matched with the lower positioning shaft (2) is formed in the lower end part of the right valve body (4); installing the left valve seat assembly (5) in the left valve body (3), installing the right valve seat assembly (6) in the right valve body (4), connecting the upper positioning shaft (1) to the upper end part of the valve core (7), and connecting the lower positioning shaft (2) to the lower end part of the valve core (7);
s2: assembling the left valve body (3), the right valve body (4) and the valve core (7) so that the left valve body (3) and the right valve body (4) are spliced, assembling the valve core (7) between the left valve body (3) and the right valve body (4), enabling the left upper half hole (8) and the right upper half hole (10) to be matched with the upper positioning shaft (1) respectively, and enabling the left lower half hole (9) and the right lower half hole (11) to be matched with the lower positioning shaft (2) respectively;
s3: welding a welding seam formed by splicing the left valve body (3) and the right valve body (4) so that the left valve body (3) and the right valve body (4) are connected to form a valve whole;
s4: removing the upper positioning shaft (1), splicing the left upper half hole (8) and the right upper half hole (10) to form an upper mounting hole, mounting the upper shaft sleeve assembly (300) in the upper mounting hole, enabling the upper tool (100) to penetrate through the upper mounting hole and be connected with the upper end part of the valve core (7), enabling the upper tool (100) to prop against the upper end of the upper shaft sleeve assembly (300) and tightly pressing and fixing the upper shaft sleeve assembly (300) on the upper end part of the valve body; removing the lower positioning shaft (2), splicing the left lower half hole (9) and the right lower half hole (11) to form a lower mounting hole, mounting the lower shaft sleeve assembly (400) in the lower mounting hole, enabling the lower tool (200) to penetrate through the lower mounting hole and be connected with the lower end part of the valve core (7), enabling the lower tool (200) to prop against the lower end of the lower shaft sleeve assembly (400) and tightly press and fix the lower shaft sleeve assembly (400) on the lower end part of the valve body, and welding the upper shaft sleeve assembly (300) and the lower shaft sleeve assembly (400) on the valve body;
s5: removing the upper tool (100), installing the valve rod assembly (500) in the upper shaft sleeve assembly (300) and enabling the valve rod assembly (500) to be in matched connection with the upper end part of the valve core (7); and removing the lower tool (200), installing the lower supporting assembly (600) in the lower shaft sleeve assembly (400) and enabling the lower supporting assembly (600) to be connected with the lower end part of the valve core (7) in a matching way.
2. The welding assembly process of the all-welded fixed ball valve according to claim 1, wherein,
an upper positioning hole (12) is formed in the upper end part of the valve core (7), and a lower positioning hole (13) is formed in the lower end part 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 element (7) is as follows:
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) on 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 element (7) is as follows:
the upper end part of the lower positioning shaft (2) is inserted into the lower positioning hole (13) and the lower positioning shaft (2) is locked and connected on the valve core (7) through bolts.
3. The welding assembly process of the all-welded fixed ball valve according to claim 1, wherein,
any one of the left valve body (3) and the right valve body (4) is provided with a splicing notch (14);
a plug-in boss (15) which is matched with the plug-in notch (14) is arranged on the other one of the left valve body (3) and the right valve body (4);
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.
4. The welding assembly process of the all-welded fixed ball valve according to claim 1, wherein,
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 the step S4 are as follows:
removing the upper positioning shaft (1), enabling the upper connecting column (16) to penetrate through the upper mounting hole and be connected with the upper end part of the valve core (7), enabling the upper bushing (21) to be inserted into the upper mounting hole, enabling the upper sleeve body (20) to be sleeved on the upper end part of the upper bushing (21), enabling the upper gland (17) to abut against the upper end of the upper sleeve body (20) and enabling the upper gland (17) to be locked on the upper connecting column (16) through the first fastener, so that the upper gland (17) can tightly press and fix the upper sleeve body (20) and the upper bushing (21); dismantling the lower positioning shaft (2), enabling the lower connecting column (18) to penetrate through the lower mounting hole and be connected with the lower end part of the valve core (7), enabling the lower bushing (23) to be mounted in the lower mounting hole, enabling the lower sleeve body (22) to be sleeved on the lower end part of the lower bushing (23), enabling the lower gland (19) to abut against the lower end of the lower sleeve body (22) and enabling the lower gland (19) to be locked on the lower connecting column (18) through the second fastening piece, enabling the lower gland (19) to tightly press and fix the lower sleeve body (22) and the lower bushing (23), and enabling the upper sleeve body (20), the upper bushing (21), the lower sleeve body (22) and the lower bushing (23) to be welded on the whole valve.
5. The welding assembly process of the all-welded fixed ball valve according to claim 4, wherein,
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 rod (24) passes through the upper gland (17);
the first nut (25) is connected to the upper end part of the first screw (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) 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).
6. The welding assembly process of the all-welded fixed ball valve according to claim 4, wherein,
an upper positioning hole (12) is formed in the upper end part of the valve core (7), and a lower positioning hole (13) is formed in the lower end part of the valve core (7);
in step S4, the specific step of connecting the upper connecting post (16) to the upper end portion of the valve body (7) is as follows:
inserting the lower end of the upper connecting column (16) into the upper positioning hole (12) and locking and connecting the upper connecting column (16) on the valve core (7) through a bolt;
in step S4, the specific step of connecting the lower connecting post (18) to the lower end portion of the valve body (7) is as follows:
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 bolts.
7. The welding assembly process of the all-welded fixed ball valve according to claim 4, wherein,
the all-welded fixed ball valve further comprises supporting feet (28);
in step S5, after the lower connection post (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 portion of the lower sleeve body (22).
8. The welding assembly process of the all-welded fixed ball valve according to claim 1, wherein,
the valve rod assembly (500) comprises a valve rod (29), a sealing sleeve (30), four open rings (31), an open-loop pressing sleeve (32) and a top flange (33);
an upper positioning hole (12) is formed in the upper end portion of the valve core (7), and a matching hole (34) which is connected with the upper positioning hole (12) and is used for inserting the lower end portion of the valve rod (29) is formed;
in step S5, the specific steps of installing the valve rod assembly (500) in the upper shaft sleeve assembly (300) and connecting the valve rod assembly (500) with the upper end part of the valve core (7) in a matching way are as follows:
inserting the lower end of the valve rod (29) into a matching hole (34) in the valve core (7) after passing through the upper shaft sleeve assembly (300);
-mounting the gland (30) between the valve stem (29) and the upper sleeve assembly (300) and inserting the lower end of the gland (30) into the upper locating hole (12);
mounting the quarter-turn ring (31) in the upper sleeve assembly (300) and abutting the quarter-turn ring (31) against the upper end of the sealing sleeve (30);
-mounting the open-loop press sleeve (32) between the valve stem (29) and the upper bushing assembly (300) and causing the open-loop press sleeve (32) to abut against the inner peripheral wall of the four-way ring (31);
-attaching the top flange (33) to the upper bushing assembly (300) and causing the top flange (33) to press against the open-loop press sleeve (32).
9. The welding assembly process of the all-welded fixed ball valve according to claim 1, wherein,
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 installing the lower bearing assembly (600) in the lower sleeve assembly (400) and connecting the lower bearing assembly (600) with the lower end portion of the valve core (7) in a matching manner are as follows:
inserting the support shaft (35) into the lower bushing assembly (400) and inserting an upper end portion of the support shaft (35) into the lower positioning hole (13);
the bottom cover (36) is screwed on the lower shaft sleeve assembly (400) and abuts against the lower end part of the supporting shaft (35).
10. The welding assembly process of the all-welded fixed ball valve according to claim 1, wherein,
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 finishing.
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