CN101358658A - Globe valve core and manufacture method thereof - Google Patents
Globe valve core and manufacture method thereof Download PDFInfo
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- CN101358658A CN101358658A CNA2008101212045A CN200810121204A CN101358658A CN 101358658 A CN101358658 A CN 101358658A CN A2008101212045 A CNA2008101212045 A CN A2008101212045A CN 200810121204 A CN200810121204 A CN 200810121204A CN 101358658 A CN101358658 A CN 101358658A
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Abstract
The invention provides a ball valve core and a manufacture method thereof and belongs to the technical field of valve manufacture. The invention solves the problem of high manufacture cost caused by that a ball shell outside the ball valve core is thicker which uses more materials. The ball valve core includes the ball shell the inside of which is an empty cavity and the outside is spherical; a valve rod connection seat used for connecting a valve rod is arranged on the spherical shell; the inner side of the ball shell is spherically concave; besides, the thicknesses of each location of the ball shell are uniform and consistent; the two ends of the ball shell are respectively provided with penetrated through hole; the valve rod connection seat is fixedly connected on the outer side of the shell ball. The manufacture method thereof is realized by the following steps: a, manufacturing the ball shell; b, manufacturing the valve rod connection seat; c, surface processing. The ball valve core of the invention has a simpler structure, consumes less materials, has a lower cost, has good precision, thickness, intensity and integrality, has more stable use stability, has a high finished product rate, is beautiful and has a better performance on environment protection.
Description
Technical field
The present invention relates to a kind of valve spool and preparation method thereof, relate in particular to a kind of ball valve core and preparation method thereof; Belong to valve technology field.
Background technique
Valve is used widely in modern society.Particularly in hot-water heating pipe fitting technical field, the valve of prior art has a variety of, mainly contains ball valve, angle valve, stop valve etc., and wherein ball-valve structure is comparatively simple, mainly is that the spool of ball valve is fairly simple.The spool of ball valve is the spheroidal structure of symmetry on the whole, the centre has one to connect whole cylindric through hole, laterally have the valve rod groove that is connected with valve rod at the outer spherical surface center position of spool, in the time of work, rotation valve rod makes the import and export of the cylindric through-hole alignment ball valve of spool, in the time of out-of-work, the import and export that the backward rotation valve rod makes the sphere of spool aim at ball valve.Because ball valve is relatively simple for structure, easy to operate.So valve technology field use very extensive.
The ball valve core of prior art all is to have a valve rod groove that matches with valve rod on spherical shell.As Chinese patent application (publication number: CN1908481A) a kind of ball valve core and preparation method thereof, this ball valve core is spherical, has a through hole that connects its center, its surface has a valve rod groove that matches with valve rod, this ball valve core by the spherical shell that is spherical shell shape and be cylindraceous in straight tube formed, both are fixed together and form a hollow body, and described through hole is the through hole of interior straight tube, and described valve rod groove is opened on spherical shell.This ball valve core is by making spherical shell, cut the slit then in the middle of spherical shell, being deformed into valve rod groove with the inside punching press of punch press, straight tube in spherical shell, assembling then, and the circumferential weld place that joins at its two ends welds, and obtains the spool base substrate, at last through after the surface treatment finished product.Though the water proofing property and the good airproof performance of the ball valve core that the ball valve core of making by said method is made than the founding casting are saved material; But because it is directly to be washed into the valve rod groove crude green body with punch press on the spherical shell surface of ball valve core, and bottom land is penetrating, so cell wall is able to downward extension during punching press, in order to ensure milling surplus and cell wall intensity, so require the wall of valve rod groove thicker, cause the spherical shell wall of whole ball valve core thicker, cause waste of material, increased the cost of whole ball valve core; In addition interior straight tube is fitted in the through hole of spherical shell, with the girth welding of the attachment portion of interior straight tube and spherical shell, interior straight tube is selected thicker metal pipe usually for use, causes the ball valve core materials more then, and cost is higher.
Summary of the invention
The objective of the invention is to provides the ball valve core that a kind of materials are few, cost is low, simple in structure at the existing in prior technology defective.
Above-mentioned technical purpose of the present invention is implemented by the following technical programs: a kind of ball valve core, comprise that an inside is spherical spherical shell for the cavity outside, has the valve rod connecting base that is used to connect valve rod on the described spherical shell, it is characterized in that, described spherical shell inboard is the sphere concavity, and spherical shell thickness uniformity everywhere, the two ends of described spherical shell have the through hole that runs through respectively, and described valve rod connecting base is connected in the spherical shell outside.
This ball valve core is loaded on the inside of ball valve body, has the feed-water end and the waterexit end that communicate with its inside on the valve body of ball valve.The through hole of this spool not with feed-water end or waterexit end at once, be that feed-water end or waterexit end are blocked in the spherical shell outside of spool, make water can't pass through ball valve, ball valve is closed condition at this moment.
Rotational valve core makes two through holes corresponding with feed-water end or waterexit end respectively, and this moment, water was discharged by the place, waterexit end through feed-water end, through hole, spool, through hole successively again.
Because spool spherical shell thickness uniformity does not everywhere need straight tube in the assembling separately.Make that so whole spool material consumption is less, weight is lighter.Simultaneously, the valve rod connecting base is to be connected in separately on the spherical shell, because the intensity of valve rod connecting base is higher, makes that spool is difficult in use damaging.
In above-mentioned ball valve core, have recessed valve rod groove on the described valve rod connecting base, described valve rod connecting base thickness is greater than shell thickness.Valve rod embeds the valve rod groove place and can easily valve rod be connected with whole spool.Simultaneously, valve rod connecting base thickness is thicker, so also makes it have enough intensity, and not fragile.
In above-mentioned ball valve core, described valve rod connecting base is connected on the spherical shell by welding.
The valve rod connecting base can be connected on the spherical shell firmly by welding.
In above-mentioned ball valve core, described through hole is that the center is symmetrical set on spherical shell with the valve rod connecting base.Usually, feed-water end on the ball valve body and waterexit end are symmetrically arranged, and therefore, such structure just makes two through holes on this spool can be right against feed-water end and waterexit end simultaneously.
Another object of the present invention is to provide a kind of above-mentioned spheroid and valve rod connecting base with ball valve core to make respectively, thereby reaches the making method of the ball valve core of saving material largely, reducing cost.
A kind of making method of ball valve core, this method may further comprise the steps:
A, make spherical shell: after metal circular tube is cut into required length, push or strike out spherical spherical shell;
B, making valve rod connecting base: open mounting hole in the spherical shell central exterior surface, make valve rod connecting base separately, the valve rod connecting base is embedded in the above-mentioned mounting hole and to both joints welds, obtain the spool blank with valve rod groove;
C, surface treatment: after above-mentioned spool blank process turning, surface finish, deburring, obtain finished product.
The present invention can put into metal circular tube mould by the extruding of metal circular tube two ends is shunk, and the middle part is expanded a little and is sphere, thus spherical shell of its whole formation.Also can be with the metal circular tube punch ram, the two ends of pipe still keep the shape of circular hole, and the middle part of pipe is stamped into sphere.
The present invention will have the valve rod connecting base and the spherical shell of valve rod groove and make separately respectively, can save material greatly, reduce the cost of product.The thinner thickness of the metal circular tube material selected for use of spherical shell wherein, as long as satisfy required intensity, the valve rod connecting base selects for use thicker metallic material to make separately.Both satisfied the requirement that valve rod frequently rotates therein, and the precision of whole ball valve core, thickness, integrity can be guaranteed, intensity is improved on the contrary.
The valve rod connecting base is consistent with the mounting hole radian on the spherical shell, is convenient in the mounting hole on the valve rod connecting base embedding spherical shell, and welding can make more firm being connected in the mounting hole of valve rod connecting base.Spool blank among the step c through after the turning, obtains finished product by surface treatment earlier then.
In the making method of above-mentioned ball valve core, the working process of the metal circular tube described in the step a is: select sheet metal, on sheet metal, strike out mounting hole, sheet metal is bent to U-shaped, form the metal circular tube blank by punch press or stamping press punching press, blank promptly gets metal circular tube after welding pipe seam.The present invention will launch sheet metal and bend to U-shaped, become the metal circular tube blank by stamping press or punch ram, weld pipe seam and make metal circular tube.Again metal circular tube is struck out spherical shell, at first stamp out mounting hole on sheet metal, this mounting hole site is in the weld seam right opposite of spherical shell.Adopt sheet metal to make the thickness that metal circular tube can effectively be controlled sheet material, the thickness of sheet metal is selected just can reach requirement about 1～1.5mm in the ordinary course of things.
In the making method of above-mentioned ball valve core, the sheet metal described in the step a is stainless steel materials or copper coin material.
In the making method of above-mentioned ball valve core, can also mill mounting hole by metal slitting saw in the spherical shell central exterior surface among the step b.Mounting hole on the outer spherical shell base substrate of the present invention in addition can also process in the following manner: select sheet metal, on sheet metal, stamp out mounting hole, then sheet metal is bent to U-shaped, form the metal circular tube base substrate by punch press or stamping press punching press, base substrate promptly gets metal circular tube after welding pipe seam, the weld seam right opposite is a mounting hole, and metal circular tube is by punching press or be squeezed into spherical outer spherical shell base substrate.Can also process in the following manner: select sheet metal, sheet metal is bent to U-shaped, form the metal circular tube base substrate by punch press or stamping press punching press, base substrate promptly gets metal circular tube after welding pipe seam, over against the facing cut mounting hole, metal circular tube is by punching press or be squeezed into spherical outer spherical shell base substrate at the metal circular tube weld seam.Mounting hole on the spherical shell outer surface can form by punch ram when selecting sheet metal, also can when forming spherical shell, mill formation by metal slitting saw, mill the radian that mounting hole can guarantee mounting hole with metal slitting saw, it is to guarantee to weld surplus that the valve rod connecting base is embedded mounting hole, thereby is convenient to the installation of valve rod connecting base.
In the making method of above-mentioned ball valve core, the working process of the valve rod connecting base described in the step b is: according to the shape and the size Selection sheet metal of valve rod connecting base, by directly obtaining the valve rod connecting base base substrate that valve rod connecting base finished product or valve rod groove leave surplus after the punch ram distortion, base substrate to required size, promptly gets valve rod connecting base finished product with the milling machine milling.In order to guarantee the intensity of valve rod connecting base, the thickness that the thickness that the present invention makes the used sheet metal of valve rod connecting base is made the spherical shell sheet metal is thick, generally about 1.5mm～2.0mm.Adopt sheet metal to form the valve rod connecting base by punch ram and can reach one-time formed purpose, technology is fairly simple, and precision is higher, and defect rate is lower.
In the making method of above-mentioned ball valve core, another working process of valve rod connecting base described in the step b is: shape and size according to the valve rod connecting base are made mould, molten metal liquid is poured in the mould, mould cools off at ambient temperature and forms the demoulding behind the valve rod connecting base base substrate, valve rod connecting base base substrate promptly gets valve rod connecting base finished product through surface treatment.The surface treatment of valve rod connecting base mainly is by the milling machine milling, by precision lathe turning, obtains finished product by process of surface treatment such as surface finish, deburrings at last then.In addition the working process of valve rod connecting base can also for: at first produce valve rod connecting base body, after milling out valve rod groove by milling machine on the valve rod connecting base body, promptly get valve rod connecting base finished product then.
In sum, the present invention has the following advantages:
1, compared with prior art, this ball valve core is owing to only be made up of spherical shell and valve rod connecting base, therefore, and it relatively simple for structure.Simultaneously,, make that the material consumption of whole spool is less, and the valve rod connecting base has enough intensity, so just make that its stability in use is also more stable under the lower-cost situation of this spool, can not occur the situation that spool damages too early because shell thickness is thinner.In addition, because the weight of whole spool is low weight, also more laborsaving in specific operation process, it is comparatively convenient to use.
2, the making method of this ball valve core has not only significantly been saved material, has reduced the cost of ball valve core; And ball valve core precision, thickness, the integrity of making can be guaranteed, and the intensity of valve rod connecting base and valve rod joint is improved.Thereby solved prior art and on spherical shell, cut earlier the slit, the purpose in cutting slit is to prevent that deformation failure is too big towards groove (valve rod groove) time, then the slit is struck out valve rod groove, again with the milling machine milling to the size that requires, in order to prevent that torsion that valve rod produces during frequent the rotation from causing the damage of valve rod groove in valve rod groove, must guarantee that valve rod groove two walls have adequate thickness, because valve rod groove and spherical shell all are integrated, on spherical shell, open valve rod groove again in advance, destroyed the intensity of valve rod groove to a certain extent.Must reach certain thickness so make the material of the metal circular tube of spherical shell, thereby increase the cost of ball valve core greatly.
3, the making method manufacturing process of this ball valve core is simplified, and reliability is better, and yield rate is higher; The ball valve core of producing is specious, and is relatively more perfect.
If 4, this method selects for use stainless steel material to make ball valve core, do not need to electroplate, the feature of environmental protection is better.
Description of drawings
Fig. 1 is outer ball valve core split structural representation.
Fig. 2 is the structural representation of this ball valve core.
Fig. 3 makes the selected metal sheeting design schematic representation of this ball valve core.
Fig. 4 is the structural representation that the sheet metal of Fig. 1 bends to U-shaped.
Fig. 5 is the structural representation of the metal circular tube of the U-shaped metallic plate punching formation among Fig. 2.
Fig. 6 is the structural representation of the spherical shell of the metal circular tube punching press formation among Fig. 3.
Fig. 7 is the structural representation that mills on the spherical shell among Fig. 4 behind the mounting hole.
Fig. 8 is the structural representation of this valve rod connecting base of making separately.
Fig. 9 is the structural representation after offering mounting hole on the sheet material among the embodiment two.
Figure 10 is the structural representation after offering mounting hole on the pipe among the embodiment three.
Among the figure, 1, spherical shell; 11, mounting hole; 13, through hole; 2, valve rod connecting base; 21, valve rod groove; 4, sheet material; 5, pipe; 51, weld seam.
Embodiment
Below by specific embodiment also in conjunction with the accompanying drawings, technological scheme of the present invention is described in further detail; But the present invention is not limited to these embodiments.
As depicted in figs. 1 and 2, this ball valve core is made up of spherical shell 1 and valve rod connecting base 2, and spherical shell 1 inside is cavity, and the outside of spherical shell 1 is spherical shape, and the inboard of spherical shell 1 is the concavity that is sphere.That is to say that spherical shell 1 thickness everywhere all is uniformity.
The two ends of spherical shell 1 have the through hole 13 that runs through respectively, and valve rod connecting base 2 just is connected in spherical shell 1 outside.
Have recessed valve rod groove 21 on the valve rod connecting base 2, valve rod groove 21 is complementary with the shape of valve rod connecting end.And the thickness of valve rod connecting base 2 is greater than the thickness of spherical shell 1.
Valve rod connecting base 2 is connected on the spherical shell 1 by welding, and two through holes 13 on the spherical shell 1 are that the center symmetry is offered with valve rod connecting base 2.
Usually, on the valve body of ball valve, have feed-water end and waterexit end, and feed-water end and waterexit end are symmetrical set.This ball valve core just is contained in the valve body, and between feed-water end and waterexit end.
When ball valve was closed condition, the through hole 13 on the spool was not corresponding with feed-water end or waterexit end.At this moment, water can't pass through this ball valve, makes ball valve be closed condition.In the time of ball valve need being opened, rotational valve core makes that two through holes 13 of spool are corresponding with feed-water end and waterexit end respectively, makes water to discharge by spool and by the place, waterexit end.
Certainly, the rotation of spool realizes by valve rod.Because valve rod is to be connected on the valve rod connecting base 2 of spool, so just makes the rotation of valve rod can drive valve core rotation, thereby realizes the switching of ball valve or adjust the water yield.
Because this spool is thinner, makes that the weight of spool is lighter, the rotational valve core that the operator therefore can be light.
The making method of this ball valve core is as follows:
Select for use the sheet metal 4 of the spherical shell 1 of making ball valve core of the present invention to be stainless steel materials, the thickness of stainless steel materials is cut to its structural representation of required length as shown in Figure 3 according to the size of ball valve core with cutting machine about 1mm～1.5mm;
Select the mould of suitable making metal circular tube 5, stainless steel materials is placed on the mould it is bent to U-shaped, on mould, the U-shaped plate stamping is become stainless pipe 5 its structural representations as shown in Figure 4 then with punch press; With welding machine the pipe seam of stainless pipe 5 is welded and to form weld seam 51, see shown in Figure 5.Stainless pipe is put into another mould, and by its two ends extruding is shunk, the middle part expands into spherical shell 1 a little, and its structural representation as shown in Figure 6.
Promptly mill out mounting hole 11 at spherical shell 1 weld seam 51 right opposites by metal slitting saw in above-mentioned spherical shell two through hole 13 neutral positions, its structural representation is shown in 7.
Shape and size Selection stainless steel materials according to valve rod connecting base 2, in order to guarantee the intensity of valve rod and valve rod connecting base 2 joints, the thickness of selected stainless steel materials is generally about 1.5mm～2.0mm, become valve rod connecting base 2 finished products or valve rod groove 21 to leave valve rod connecting base 2 base substrates of surplus by punch ram distortion back then, base substrate to required size, promptly gets valve rod connecting base 2 finished products with the milling machine milling.The structural representation of described valve rod connecting base 2 is shown in 8.
Valve rod connecting base 2 is embedded in the mounting hole 11 of spherical shell 1; And both joints are welded, this soldering point obtains the ball valve core blank on the non-tight face, and its split structural representation is as shown in Figure 1.
After above-mentioned ball valve core blank carried out turning, after handling by surface finish, deburring again, promptly be made into ball valve core of the present invention; Its structural representation as shown in Figure 2.
See shown in Figure 9ly, select the mould of suitable making metal circular tube 5, stainless steel materials 4 is stamped out mounting hole 11 by stamping press, be placed on the mould it is bent to U-shaped, on mould, the U-shaped plate stamping is become stainless pipe 5 then with punch press; With welding machine the pipe seam of stainless pipe 5 is welded and to form weld seam 51.Stainless pipe 5 is put into another mould, and by its two ends extruding is shunk, the middle part expands into spherical shell 1 a little, need not mill mounting hole 11 in addition on spherical shell 1.
The working process of described valve rod connecting base 2 is as follows: shape and size according to valve rod connecting base 2 are made mould, the copper metal liquid of fusion is poured in the mould, mould cools off at ambient temperature and forms the demoulding behind valve rod connecting base 2 base substrates, valve rod connecting base 2 base substrates are handled through surface finish, deburring, promptly get valve rod connecting base 2 finished products.Other technological process repeats no more with embodiment 1.
Embodiment 3
See shown in Figure 10ly, select the mould of suitable making metal circular tube 5, stainless steel materials is placed on the mould it is bent to U-shaped, on mould, the U-shaped plate stamping is become stainless pipe 5 then with punch press; With welding machine the pipe seam of stainless pipe 5 is welded and to form weld seam 51, promptly mill out mounting hole 11 by metal slitting saw at stainless pipe 5 weld seams 51 right opposites in stainless pipe 5 neutral positions.Stainless pipe is put into another mould, and by its two ends extruding is shunk, the middle part expands into spherical shell 1 a little; Need on spherical shell 1, not mill mounting hole 11 in addition.
The working process of described valve rod connecting base 2 is as follows: produce valve rod connecting base 2 bodies earlier, after milling out valve rod groove 21 by milling machine on valve rod connecting base 2 bodies, promptly get valve rod connecting base 2 finished products then.Other technological process repeats no more with embodiment 1.
Specific embodiment described in the present invention only is that the present invention's spirit is illustrated.The technician of the technical field of the invention can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Although this paper has used terms such as spherical shell 1, mounting hole 11, through hole 13, valve rod connecting base 2, valve rod groove 21, sheet material 4, pipe 5 morely, do not get rid of the possibility of using other term.Using these terms only is in order to describe and explain essence of the present invention more easily; They are construed to any additional restriction all is contrary with spirit of the present invention.
Claims (10)
1, a kind of ball valve core, comprise that an inside is spherical spherical shell (1) for the cavity outside, has the valve rod connecting base (2) that is used to connect valve rod on the described spherical shell (1), it is characterized in that, described spherical shell (1) inboard is the sphere concavity, and spherical shell (1) thickness uniformity everywhere, the two ends of described spherical shell (1) have the through hole (13) that runs through respectively, and described valve rod connecting base (2) is connected in spherical shell (1) outside.
2, ball valve core according to claim 1 and preparation method thereof is characterized in that, has recessed valve rod groove (21) on the described valve rod connecting base (2), and described valve rod connecting base (2) thickness is greater than spherical shell (1) thickness.
3, ball valve core according to claim 2 and preparation method thereof is characterized in that, described valve rod connecting base (2) is connected on the spherical shell (1) by welding.
According to claim 1 or 2 or 3 described ball valve cores and preparation method thereof, it is characterized in that 4, described through hole (13) is that the center is symmetrical set with valve rod connecting base (2) on spherical shell (1).
5, a kind of making method of ball valve core, this method may further comprise the steps:
A, make spherical shell (1): after metal circular tube (5) is cut into required length, push or strike out spherical spherical shell (1);
B, making valve rod connecting base (2): open mounting hole (11) in spherical shell (1) central exterior surface, make valve rod connecting base (2) separately with valve rod groove (21), valve rod connecting base (2) is embedded in the above-mentioned mounting hole (11) and to both joints welds, obtain the spool blank;
C, surface treatment: after above-mentioned spool blank process turning, surface finish, deburring, obtain finished product.
6, ball valve core according to claim 5 and preparation method thereof, it is characterized in that, the working process of the metal circular tube among the described step a (5) is: select sheet metal (4), on sheet metal (4), strike out mounting hole (11), sheet metal (4) is bent to U-shaped, form metal circular tube (5) blank by punch press or stamping press punching press, blank promptly gets metal circular tube (5) after welding pipe seam.
7, ball valve core according to claim 6 and preparation method thereof is characterized in that, the sheet metal among the described step a (4) is stainless steel materials (4) or copper coin material (4).
8, ball valve core according to claim 5 and preparation method thereof is characterized in that, can also mill mounting hole (11) by metal slitting saw in spherical shell (1) central exterior surface among the described step b.
9, according to any described ball valve core of claim 5～8 and preparation method thereof, it is characterized in that, the working process of the valve rod connecting base (2) among the described step b is: according to the shape and the size Selection sheet metal (4) of valve rod connecting base (2), by directly obtaining valve rod connecting base (2) base substrate that valve rod connecting base (2) finished product or valve rod groove (21) leave surplus after the punch ram distortion, base substrate to required size, promptly gets valve rod connecting base (2) finished product with the milling machine milling.
10, according to any described ball valve core of claim 5～8 and preparation method thereof, it is characterized in that, another working process of valve rod connecting base (2) among the described step b is: shape and size according to valve rod connecting base (2) are made mould, molten metal liquid is poured in the mould, mould cools off at ambient temperature and forms the demoulding behind valve rod connecting base (2) base substrate, valve rod connecting base (2) base substrate promptly gets valve rod connecting base (2) finished product through surface treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101212045A CN101358658A (en) | 2008-09-12 | 2008-09-12 | Globe valve core and manufacture method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101212045A CN101358658A (en) | 2008-09-12 | 2008-09-12 | Globe valve core and manufacture method thereof |
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| CN101358658A true CN101358658A (en) | 2009-02-04 |
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| CNA2008101212045A Pending CN101358658A (en) | 2008-09-12 | 2008-09-12 | Globe valve core and manufacture method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777626A (en) * | 2012-08-16 | 2012-11-14 | 无锡杰尔压缩机有限公司 | Valve element structure of plug valve |
| CN103769800A (en) * | 2012-10-22 | 2014-05-07 | 河南神州重型封头有限公司 | Manufacture process for ball valve ball casing |
| CN103934636A (en) * | 2014-04-17 | 2014-07-23 | 台州响洲机械有限公司 | Manufacturing method of handle core and handle core |
| CN106895168A (en) * | 2017-03-17 | 2017-06-27 | 南通捷瑞阀门有限公司 | A kind of flow restriction control valve and its production technology |
| CN114043173A (en) * | 2021-11-23 | 2022-02-15 | 山西汾西重工有限责任公司 | Semi-cylindrical shell machining method and device and computer storage medium |
-
2008
- 2008-09-12 CN CNA2008101212045A patent/CN101358658A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777626A (en) * | 2012-08-16 | 2012-11-14 | 无锡杰尔压缩机有限公司 | Valve element structure of plug valve |
| CN103769800A (en) * | 2012-10-22 | 2014-05-07 | 河南神州重型封头有限公司 | Manufacture process for ball valve ball casing |
| CN103769800B (en) * | 2012-10-22 | 2016-04-13 | 河南神州精工制造股份有限公司 | The spherical shell manufacture craft of ball valve |
| CN103934636A (en) * | 2014-04-17 | 2014-07-23 | 台州响洲机械有限公司 | Manufacturing method of handle core and handle core |
| CN106895168A (en) * | 2017-03-17 | 2017-06-27 | 南通捷瑞阀门有限公司 | A kind of flow restriction control valve and its production technology |
| CN114043173A (en) * | 2021-11-23 | 2022-02-15 | 山西汾西重工有限责任公司 | Semi-cylindrical shell machining method and device and computer storage medium |
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Open date: 20090204 |