A thin valve body casting
By designing a multi-channel structure and using specific inoculant, the problems of sealing and dimensional control of ZYJGKZ-13-1 body castings under high pressure are solved, and efficient casting defect reduction and tissue compactness are achieved.
Patent Information
- Application Number
- CN202411350266.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-26
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2044-09-26
AI Technical Summary
During the production process, the castings have difficulty in ensuring the shrinkage of the casting size, the oil passage is small and difficult to drill, and the gas in the sand core is difficult to discharge, resulting in pore bubble defects and affecting the sealing properties under high-pressure working conditions.
Design volume thin valve body castings, adopt multiple longitudinal, vertical and arc-shaped runner structures, combine resin sand and aluminum-containing incubator, and reduce subcutaneous pores by adding cold iron and lanthanum spheroidizers. , control cast size and tissue density.
The sealing without leakage under high pressure is achieved, and casting defects such as air holes and shrinkage holes are reduced, ensuring the dimensional accuracy of the casting and the compactness of the internal tissue.
Smart Images
Figure CN118875244B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of valve body production, and in particular to a thin valve body casting. Background Art
[0002] The ZYJGKZ-13-1 valve body is a mechanical valve body developed by our company in response to the requirements of Wuxi Weifu Hydraulic Co., Ltd. and market demand. The casting of this product is thin, and it is difficult to guarantee the shrinkage of the casting size; and the casting oil channel is small and difficult to drill. After pouring, the gas in the sand core is difficult to discharge, which leads to large-area pores and bubbles during multiple tests. Summary of the invention
[0003] In order to solve the above technical problems, the present invention proposes a thin valve body casting with ingenious design, reasonable and compact structure, which can solve the subcutaneous pores of the casting; solve the casting defects such as shrinkage, looseness, internal pores, etc. of the casting, especially the defects of micropores inside the casting, improve the density of the internal structure, so as to achieve no leakage under the high-pressure working state of rated pressure ≥37MPa; and control the size of the casting.
[0004] The technical solution of the present invention:
[0005] A thin valve body casting, comprising a main body, a first longitudinal flow channel, a second longitudinal flow channel, a third longitudinal flow channel, a fourth longitudinal flow channel, and a fifth longitudinal flow channel, wherein the main body is a rectangular body.
[0006] There are 9 flow openings designed in front of the main body, namely the front first flow opening, the front second flow opening, the front third flow opening, the front fourth flow opening, the front fifth flow opening, the front sixth flow opening, the front seventh flow opening, the front eighth flow opening, and the front ninth flow opening;
[0007] There are 8 flow ports designed at the back of the main body, namely the rear first flow port, rear second flow port, rear third flow port, rear fourth flow port, rear fifth flow port, rear sixth flow port, rear seventh flow port, and rear eighth flow port;
[0008] There are 16 flow outlets designed on the main body, namely the upper first flow outlet, the upper second flow outlet, the upper third flow outlet, the upper fourth flow outlet, the upper fifth flow outlet, the upper sixth flow outlet, the upper seventh flow outlet, the upper eighth flow outlet, the upper ninth flow outlet, the upper tenth flow outlet, the upper eleventh flow outlet, the upper twelfth flow outlet, the upper thirteenth flow outlet, the upper fourteenth flow outlet, the upper fifteenth flow outlet, and the upper sixteenth flow outlet;
[0009] There are 5 flow outlets designed under the main body, namely the lower flow outlet, the lower second flow outlet, the lower third flow outlet, the lower fourth flow outlet, and the lower fifth flow outlet;
[0010] There are two flow outlets designed on the left side of the main body, namely the left first flow outlet and the left second flow outlet;
[0011] There are two flow outlets designed on the right side of the main body, namely the right primary flow outlet and the right secondary flow outlet;
[0012] There are five longitudinal flow channels designed in the middle of the main body, from left to right, namely the first longitudinal flow channel, the second longitudinal flow channel, the third longitudinal flow channel, the fourth longitudinal flow channel, and the fifth longitudinal flow channel;
[0013] The first longitudinal flow channel is designed with five annular grooves from front to back, namely, a first annular groove, a second annular groove, a third annular groove, a fourth annular groove, and a fifth annular groove;
[0014] The front end of the first longitudinal flow channel is connected to the previous flow channel opening, and the rear end of the first longitudinal flow channel is connected to the next flow channel opening; two vertical flow channels are designed on the left side of the first longitudinal flow channel, namely the first vertical flow channel and the second vertical flow channel, the upper end of the first vertical flow channel is connected to the previous flow channel opening, the lower end of the first vertical flow channel is connected to the left flow channel opening through a horizontal flow channel, and the lower end of the first vertical flow channel is also connected to the next six flow channel openings through a sixth longitudinal flow channel, the upper end of the second vertical flow channel is connected to the upper eight flow channel openings, and the The lower end is connected to the left second flow channel opening and the sixth longitudinal flow channel through a horizontal flow channel, and the lower end of the second vertical flow channel is also connected to the first six flow channel openings through a longitudinal flow channel; one side of the first vertical flow channel is connected to the fifth annular groove through a flow channel, and one side of the second vertical flow channel is connected to the third annular groove through a flow channel; a first arc flow channel is also designed above the first longitudinal flow channel, and the two ends of the first arc flow channel are respectively connected to the two ends of the first longitudinal flow channel near the mouth, and the first arc flow channel is also respectively connected to the first annular groove and the fifth annular groove through a flow channel;
[0015] The second longitudinal flow channel is designed with three annular grooves from front to back, namely the sixth annular groove, the seventh annular groove, and the eighth annular groove; the front end of the second longitudinal flow channel is connected to the front two flow channel openings, and the rear end of the second longitudinal flow channel is connected to the rear two flow channel openings; two vertical flow channels are designed between the first longitudinal flow channel and the second longitudinal flow channel, namely the third vertical flow channel and the fourth vertical flow channel, the upper end of the third vertical flow channel is connected to the upper two flow channel openings, the upper end of the fourth vertical flow channel is connected to the upper nine flow channel openings, the fourth annular groove is connected to the third vertical flow channel through the flow channel, the first annular groove is connected to the fourth vertical flow channel through the flow channel, the lower end of the third vertical flow channel is connected to the front seven flow channel openings through the seventh longitudinal flow channel, and the lower end of the fourth vertical flow channel is also connected to the seventh longitudinal flow channel; the upper end of the sixth annular groove is connected to the upper ten flow channel openings through the flow channel, the lower end of the second longitudinal flow channel is designed with a second arc flow channel, the rear end of the second arc flow channel is connected to the rear end of the second longitudinal flow channel near the mouth, and the front end of the second longitudinal flow channel is connected to the seventh annular groove,
[0016] The third longitudinal flow channel is designed with five annular grooves from front to back, namely the ninth annular groove, the tenth annular groove, the eleventh annular groove, the twelfth annular groove, and the thirteenth annular groove; the front end of the third longitudinal flow channel is connected to the front three flow channel openings, and the rear end of the third longitudinal flow channel is connected to the rear three flow channel openings; the eleventh annular groove is connected to the eighth annular groove through a flow channel; three vertical flow channels are designed between the third longitudinal flow channel and the second longitudinal flow channel, namely the fifth vertical flow channel, the sixth vertical flow channel and the seventh vertical flow channel, the upper end of the fifth vertical flow channel is connected to the upper three flow channel openings, and the lower end of the fifth vertical flow channel is connected to the upper two flow channel openings through an inclined flow channel; the sixth ... three flow channel openings through an inclined flow channel; the sixth vertical flow channel is connected to the upper two flow channel openings through an inclined flow channel; the sixth vertical flow channel is connected to the upper two flow channel openings through an inclined flow channel. The lower end of the sixth vertical flow channel is connected to the next flow channel opening, the upper end of the sixth vertical flow channel is connected to the flow channel between the eleventh ring groove and the eighth ring groove through the flow channel; the upper end of the seventh vertical flow channel is connected to the eleventh flow channel opening, the lower end of the seventh vertical flow channel is connected to the first eight flow channel openings through the eighth longitudinal flow channel, and the rear end of the eighth longitudinal flow channel is connected to the position near the middle of the sixth vertical flow channel; the upper end of the twelfth ring groove is connected to the upper four flow channel openings through the flow channel, and the upper end of the tenth ring groove is connected to the upper twelfth flow channel opening through the flow channel; a third arc flow channel is also designed on the right side of the third longitudinal flow channel, the front end of the third arc flow channel is connected to the thirteenth ring groove, and the rear end of the third arc flow channel is connected to the ninth ring groove;
[0017] The fourth longitudinal flow channel is designed with five annular grooves from front to back, namely the fourteenth annular groove, the fifteenth annular groove, the sixteenth annular groove, the seventeenth annular groove and the eighteenth annular groove; the front end of the fourth longitudinal flow channel is connected to the first four flow channel openings, and the rear end of the fourth longitudinal flow channel is connected to the rear four flow channel openings; a fourth arc flow channel is designed at the upper position between the fourth longitudinal flow channel and the third longitudinal flow channel, the fourth arc flow channel is located above the third arc flow channel, the middle upper end of the fourth arc flow channel is connected to the thirteenth flow channel openings through the eighth vertical flow channel, the rear end of the fourth arc flow channel is connected to the five flow channel openings through the eighteenth vertical flow channel, and the front end of the fourth arc flow channel is connected to the fourteenth flow channel openings through the ninth vertical flow channel; the sixteenth annular groove is connected to the middle position of the eighteenth vertical flow channel through the fifth arc flow channel; a sixth arc flow channel is also designed below the fourth longitudinal flow channel, and the sixth arc The rear end of the arc-shaped flow channel is connected to the rear end of the fourth longitudinal flow channel near the mouth, and the front end of the sixth arc-shaped flow channel is connected to the front end of the fourth longitudinal flow channel near the mouth; the upper end of the fifteenth annular groove is connected to the front end of the sixth arc-shaped flow channel through the flow channel, and the upper end of the seventeenth annular groove is connected to the rear end of the sixth arc-shaped flow channel through the flow channel; the lower end of the sixth arc-shaped flow channel is connected to the lower two flow channel openings through the tenth vertical flow channel near the middle; the lower end of the ninth vertical flow channel is connected to the upper end of the sixth annular groove through a transverse flow channel, and the upper side of the middle of the seventh vertical flow channel is connected to one side of the transverse flow channel; the two ends of the fourth longitudinal flow channel near the mouth are respectively connected to the two ends of the third longitudinal flow channel near the mouth through a transverse flow channel; the tenth longitudinal flow channel is designed at the lower rear position between the fourth longitudinal flow channel and the third longitudinal flow channel, and the rear end of the tenth longitudinal flow channel is connected to the latter seven flow channel openings;
[0018] The fifth longitudinal flow channel is designed with five annular grooves from front to back, namely the 19th annular groove, the 20th annular groove, the 21st annular groove, the 22nd annular groove, and the 23rd annular groove; the front end of the fifth longitudinal flow channel is connected to the front five flow channel openings, and the rear end of the fifth longitudinal flow channel is connected to the rear five flow channel openings; the 21st annular groove is connected to the 17th annular groove through the Z-type flow channel, and the middle rear side of the Z-type flow channel is connected to the upper six flow channel openings through the 12th vertical flow channel, the 20th annular groove is connected to the 15th annular groove through the flow channel, and the middle front side of the flow channel is connected to the upper 15 flow channel openings through the 11th vertical flow channel; the lower end of the fifth longitudinal flow channel is designed with the eighth arc flow channel and the seventh arc flow channel, the rear end of the eighth arc flow channel is connected to the 23rd annular groove, the front end of the eighth arc flow channel is connected to the 19th annular groove, the rear end of the seventh arc flow channel is connected to the rear end of the fifth longitudinal flow channel near the mouth, and the front end of the seventh arc flow channel is connected to the front end of the fifth longitudinal flow channel near the mouth;
[0019] A ninth longitudinal flow channel is also designed below the fourth longitudinal flow channel and the fifth longitudinal flow channel, the front end of the ninth longitudinal flow channel is connected to the front nine flow channel openings, and the rear end of the ninth longitudinal flow channel is connected to the rear eight flow channel openings; a thirteenth vertical flow channel and a fourteenth vertical flow channel are vertically designed in the middle of the ninth longitudinal flow channel, the lower end of the thirteenth vertical flow channel is connected to the lower three flow channel openings, the thirteenth vertical flow channel penetrates the ninth longitudinal flow channel and then is connected to the nineteenth annular groove, the lower end of the fourteenth vertical flow channel is connected to the lower five flow channel openings, and the fourteenth vertical flow channel penetrates the ninth longitudinal flow channel and then is connected to the twenty-second annular groove;
[0020] The upper end of the nineteenth annular groove is connected to the sixteenth flow channel through the fifteenth vertical flow channel, the upper end of the twenty-second annular groove is connected to the seventh flow channel through the sixteenth vertical flow channel, and the upper end of the twenty-second annular groove is connected to the lower end of the sixteenth vertical flow channel through an L-shaped flow channel;
[0021] The rear end of the tenth longitudinal flow channel near the left side of the mouth is connected to the sixth longitudinal flow channel through a transverse flow channel and then connected to the left first flow channel mouth. The rear end of the tenth longitudinal flow channel near the right side of the mouth is connected to the right second flow channel mouth through a transverse flow channel, and the rear end of the fifth longitudinal flow channel near the mouth is connected to the upper side of the transverse flow channel through a vertical flow channel.
[0022] The right side of the front end of the tenth longitudinal flow channel is connected to the right flow channel opening through a transverse flow channel, and the transverse flow channel is also respectively connected to the upper end of the tenth vertical flow channel and the middle position of the ninth longitudinal flow channel. The lower end of the middle position of the ninth longitudinal flow channel is also connected to the lower four flow channel openings through the seventeenth vertical flow channel.
[0023] During the production process of the thin valve body casting, a cavity in a sand box is made according to the product shape, and then large sand cores of the first longitudinal flow channel, the second longitudinal flow channel, the third longitudinal flow channel, the fourth longitudinal flow channel, and the fifth longitudinal flow channel and small sand cores of the corresponding vertical flow channel, transverse flow channel, arc flow channel and other flow channels are manufactured according to the flow channel structure design of the product. Then, the large sand core of the main flow channel and the small sand cores of the other flow channels are placed in the cavity of the sand box, the sand box is closed, and molten iron is poured in from the reserved pouring riser. After waiting for cooling, the sand box is opened, the valve body casting is taken out, and the internal sand cores are cleaned and exported to complete the processing.
[0024] The large sand core and the small sand core use ordinary graphite powder coating, and the coating containing cryolite powder is brushed on the outer surface of the sand core and an inoculant with an aluminum content of 1.8% is used during the secondary inoculation; the inoculant needs to be dried at 300-400°C.
[0025] The pouring riser is provided with chill iron at a diameter of 90 mm, and the molten iron of the casting adopts a nodulizer containing lanthanum to increase the number of graphite balls by 2-3 times.
[0026] The sand used in the mold cavity is resin sand, wherein the SiO2 content is greater than 96%.
[0027] The advantages of the present invention are ingenious design, reasonable and compact structure, adding a certain amount of cryolite powder to the coating, using an aluminum-containing inoculant, and reducing subcutaneous pores by using an aluminum-containing inoculant (1.8%); adding cold iron at the φ90mm pouring head to control shrinkage, and using the strength of resin sand to combine the mold box belt to ensure the size. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] Figure 1 It is a front and top perspective view of the present invention.
[0029] Figure 2 It is a rear, top perspective view of the present invention.
[0030] Figure 3 It is a front and bottom three-dimensional view of the present invention.
[0031] Figure 4 It is a horizontal cross-sectional top view of the middle position of the present invention.
[0032] Figure 5 It is a schematic cross-sectional top view of the sixth, seventh, eighth, ninth and tenth positions of the present invention.
[0033] Figure 6 It is a schematic bottom view of a transverse section of the fourth arc-shaped flow channel of the present invention.
[0034] Figure 7 It is a vertical cross-sectional schematic diagram of the first and second vertical flow channels of the present invention.
[0035] Figure 8It is a vertical cross-sectional schematic diagram of the first longitudinal flow channel of the present invention.
[0036] Fig. 9 It is a vertical cross-sectional schematic diagram of the third and fourth vertical flow channels of the present invention.
[0037] Fig.10 It is a vertical cross-sectional schematic diagram of the second longitudinal flow channel of the present invention.
[0038] Fig.11 It is a vertical cross-sectional schematic diagram of the sixth and seventh vertical flow channels of the present invention.
[0039] Fig.12 It is a vertical cross-sectional schematic diagram of the third longitudinal flow channel of the present invention.
[0040] Fig.13 It is a vertical cross-sectional schematic diagram of the eighth vertical flow channel of the present invention.
[0041] Fig.14 It is a vertical cross-sectional schematic diagram of the ninth and eighteenth vertical flow channels of the present invention.
[0042] Figure 15-16 is a vertical cross-sectional schematic diagram of the fourth longitudinal flow channel of the present invention ( Fig.15 Center left, Fig.16 middle position).
[0043] Fig.17 It is a vertical cross-sectional schematic diagram of the eleventh and twelfth vertical flow channels of the present invention.
[0044] Fig.18 It is a vertical cross-sectional schematic diagram of the ninth longitudinal flow channel of the present invention.
[0045] Fig.19 It is a vertical cross-sectional schematic diagram of the thirteenth and fourteenth vertical flow channels of the present invention.
[0046] Figure 20-21 is a vertical cross-sectional schematic diagram of the fifth longitudinal flow channel of the present invention ( Fig. 20 Center left, Fig.21 middle position). DETAILED DESCRIPTION
[0047] See attached Figure 1-21 A thin valve body casting includes a main body 1, a first longitudinal flow channel 101, a second longitudinal flow channel 102, a third longitudinal flow channel 103, a fourth longitudinal flow channel 104, and a fifth longitudinal flow channel 105. The main body 1 is a rectangular body.
[0048] The front of the main body 1 is designed with 9 flow openings, namely, a front first flow opening 11, a front second flow opening 12, a front third flow opening 13, a front fourth flow opening 14, a front fifth flow opening 15, a front sixth flow opening 16, a front seventh flow opening 17, a front eighth flow opening 18, and a front ninth flow opening 19;
[0049] There are 8 flow openings designed at the rear of the main body 1, namely, a rear first flow opening 21, a rear second flow opening 22, a rear third flow opening 23, a rear fourth flow opening 24, a rear fifth flow opening 25, a rear sixth flow opening 26, a rear seventh flow opening 27, and a rear eighth flow opening 28;
[0050] The main body 1 is designed with 16 flow channels, which are upper flow channel 31, upper second flow channel 32, upper third flow channel 33, upper fourth flow channel 34, upper fifth flow channel 35, upper sixth flow channel 36, upper seventh flow channel 37, upper eighth flow channel 38, upper ninth flow channel 39, upper tenth flow channel 310, upper eleventh flow channel 311, upper twelfth flow channel 312, upper thirteenth flow channel 313, upper fourteenth flow channel 314, upper fifteenth flow channel 315, and upper sixteenth flow channel 316;
[0051] Five flow channels are designed below the main body 1, namely, a lower flow channel 41, a lower second flow channel 42, a lower third flow channel 43, a lower fourth flow channel 44, and a lower fifth flow channel 45;
[0052] The left side of the main body 1 is designed with two flow passages, namely a left first flow passage 51 and a left second flow passage 52;
[0053] Two flow passages are designed on the right side of the main body 1, namely a right first flow passage 61 and a right second flow passage 62;
[0054] Five longitudinal channels are designed in the middle of the main body 1, which are, from left to right, the first longitudinal channel 101, the second longitudinal channel 102, the third longitudinal channel 103, the fourth longitudinal channel 104, and the fifth longitudinal channel 105;
[0055] The first longitudinal flow channel 101 is designed with five annular grooves from front to back, namely, a first annular groove, a second annular groove, a third annular groove, a fourth annular groove, and a fifth annular groove;
[0056] The front end of the first longitudinal flow channel 101 is connected to the previous flow channel opening 11, and the rear end of the first longitudinal flow channel 101 is connected to the rear flow channel opening 21; two vertical flow channels are designed on the left side of the first longitudinal flow channel 101, namely the first vertical flow channel 71 and the second vertical flow channel 72, the upper end of the first vertical flow channel 71 is connected to the upper flow channel opening 31, the lower end of the first vertical flow channel 71 is connected to the left flow channel opening 51 through a horizontal flow channel, and the lower end of the first vertical flow channel 71 is also connected to the rear six flow channel openings 26 through a sixth longitudinal flow channel 106, the upper end of the second vertical flow channel 72 is connected to the upper eight flow channel openings 38, and the second The lower end of the vertical flow channel 72 is connected to the left second flow channel opening 52 and the sixth longitudinal flow channel 106 through a transverse flow channel, and the lower end of the second vertical flow channel 72 is also connected to the first six flow channel openings 16 through a longitudinal flow channel; one side of the first vertical flow channel 71 is connected to the fifth annular groove through a flow channel, and one side of the second vertical flow channel 72 is connected to the third annular groove through a flow channel; a first arc flow channel 81 is also designed above the first longitudinal flow channel 101, and the two ends of the first arc flow channel 81 are respectively connected to the two ends of the first longitudinal flow channel 101 near the mouth, and the first arc flow channel 81 is also respectively connected to the first annular groove and the fifth annular groove through a flow channel;
[0057] The second longitudinal flow channel 102 is designed with three annular grooves from front to back, namely the sixth annular groove, the seventh annular groove, and the eighth annular groove; the front end of the second longitudinal flow channel 102 is connected to the front two flow channel openings 12, and the rear end of the second longitudinal flow channel 102 is connected to the rear two flow channel openings 22; two vertical flow channels are designed between the first longitudinal flow channel 101 and the second longitudinal flow channel 102, namely the third vertical flow channel 73 and the fourth vertical flow channel 74, the upper end of the third vertical flow channel 73 is connected to the upper two flow channel openings 32, the upper end of the fourth vertical flow channel 74 is connected to the upper nine flow channel openings 39, and the fourth annular groove The third vertical flow channel 73 is connected through the flow channel, the first annular groove is connected to the fourth vertical flow channel 74 through the flow channel, the lower end of the third vertical flow channel 73 is connected to the first seven flow channel openings 17 through the seventh longitudinal flow channel 107, and the lower end of the fourth vertical flow channel 74 is also connected to the seventh longitudinal flow channel 107; the upper end of the sixth annular groove is connected to the upper ten flow channel openings 310 through the flow channel, and the lower end of the second longitudinal flow channel 102 is designed with a second arc flow channel 82, the rear end of the second arc flow channel 82 is connected to the rear end of the second longitudinal flow channel 102 near the mouth, and the front end of the second longitudinal flow channel 102 is connected to the seventh annular groove,
[0058] The third longitudinal flow channel 103 is designed with five annular grooves from front to back, namely the ninth annular groove, the tenth annular groove, the eleventh annular groove, the twelfth annular groove and the thirteenth annular groove; the front end of the third longitudinal flow channel 103 is connected to the front three flow channel openings 13, and the rear end of the third longitudinal flow channel 103 is connected to the rear three flow channel openings 23; the eleventh annular groove is connected to the eighth annular groove through a flow channel; three vertical flow channels are designed between the third longitudinal flow channel 103 and the second longitudinal flow channel 102, namely the fifth vertical flow channel 75, the sixth vertical flow channel 76 and the seventh vertical flow channel 77, the upper end of the fifth vertical flow channel 75 is connected to the upper three flow channel openings 33, and the lower end of the fifth vertical flow channel 75 is connected to the upper two flow channel openings 32 through an inclined flow channel; the sixth vertical flow channel 7 The lower end of the sixth vertical flow channel 76 is connected to the next flow channel opening 41, and the upper end of the sixth vertical flow channel 76 is connected to the flow channel between the eleventh ring groove and the eighth ring groove through the flow channel; the upper end of the seventh vertical flow channel 77 is connected to the upper eleventh flow channel opening 311, and the lower end of the seventh vertical flow channel 77 is connected to the first eight flow channel openings 18 through the eighth longitudinal flow channel 108, and the rear end of the eighth longitudinal flow channel 108 is connected to the sixth vertical flow channel 76 near the middle position; the upper end of the twelfth ring groove is connected to the upper four flow channel openings 34 through the flow channel, and the upper end of the tenth ring groove is connected to the upper twelfth flow channel opening 312 through the flow channel; a third arc flow channel 83 is also designed on the right side of the third longitudinal flow channel 103, the front end of the third arc flow channel 83 is connected to the thirteenth ring groove, and the rear end of the third arc flow channel 83 is connected to the ninth ring groove;
[0059] The fourth longitudinal flow channel 104 is designed with five annular grooves from front to back, namely the fourteenth annular groove, the fifteenth annular groove, the sixteenth annular groove, the seventeenth annular groove, and the eighteenth annular groove; the front end of the fourth longitudinal flow channel 104 is connected to the front four flow channel openings 14, and the rear end of the fourth longitudinal flow channel 104 is connected to the rear four flow channel openings 24; a fourth arc flow channel 84 is designed at an upper position between the fourth longitudinal flow channel 104 and the third longitudinal flow channel 103, and the fourth arc flow channel 84 is located at the third arc flow channel 83 At the top, the middle upper end of the fourth arc flow channel 84 is connected to the thirteenth flow channel opening 313 through the eighth vertical flow channel 78, the rear end of the fourth arc flow channel 84 is connected to the fifth flow channel opening 35 through the eighteenth vertical flow channel 718, and the front end of the fourth arc flow channel 84 is connected to the fourteenth flow channel opening 314 through the ninth vertical flow channel 79; the sixteenth annular groove is connected to the middle position of the eighteenth vertical flow channel 718 through the fifth arc flow channel 85; and a sixth arc flow channel 8 is also designed below the fourth longitudinal flow channel 104. 6. The rear end of the sixth arc flow channel 86 is connected to the rear end of the fourth longitudinal flow channel 104 near the mouth, and the front end of the sixth arc flow channel 86 is connected to the front end of the fourth longitudinal flow channel 104 near the mouth; the upper end of the fifteenth annular groove is connected to the sixth arc flow channel 86 near the front end through the flow channel, and the upper end of the seventeenth annular groove is connected to the sixth arc flow channel 86 near the rear end through the flow channel; the lower end of the sixth arc flow channel 86 is connected to the lower second flow channel opening 42 through the tenth vertical flow channel 710 near the middle; the lower end of the ninth vertical flow channel 79 is connected to the upper end of the sixth annular groove through a transverse flow channel, and the upper side of the middle of the seventh vertical flow channel 77 is connected to one side of a transverse flow channel; the two ends of the fourth longitudinal flow channel 104 near the mouth are respectively connected to the two ends of the third longitudinal flow channel 103 near the mouth through a transverse flow channel; the tenth longitudinal flow channel 110 is designed at the lower rear position between the fourth longitudinal flow channel 104 and the third longitudinal flow channel 103, and the rear end of the tenth longitudinal flow channel 110 is connected to the rear seven flow channel openings 27;
[0060] The fifth longitudinal flow channel 105 is designed with five annular grooves from front to back, namely the nineteenth annular groove, the twentieth annular groove, the twenty-first annular groove, the twenty-second annular groove, and the twenty-third annular groove; the front end of the fifth longitudinal flow channel 105 is connected to the front five flow channel openings 15, and the rear end of the fifth longitudinal flow channel 105 is connected to the rear five flow channel openings 25; the twenty-first annular groove is connected to the seventeenth annular groove through the Z-shaped flow channel, and the middle rear side of the Z-shaped flow channel is connected to the upper six flow channel openings 36 through the twelfth vertical flow channel 712, and the twentieth annular groove is connected to the flow channel through the twelfth vertical flow channel 712. The fifth longitudinal flow channel 105 is connected to the fifteenth annular groove and the middle front side of the flow channel is connected to the fifteenth flow channel opening 315 through the eleventh vertical flow channel 711; the eighth arc flow channel 88 and the seventh arc flow channel 87 are designed at the lower end of the fifth longitudinal flow channel 105, the rear end of the eighth arc flow channel 88 is connected to the twenty-third annular groove, the front end of the eighth arc flow channel 88 is connected to the nineteenth annular groove, the rear end of the seventh arc flow channel 87 is connected to the rear end of the fifth longitudinal flow channel 105 near the mouth, and the front end of the seventh arc flow channel 87 is connected to the front end of the fifth longitudinal flow channel 105 near the mouth;
[0061] A ninth longitudinal flow channel 109 is also designed below the fourth longitudinal flow channel 104 and the fifth longitudinal flow channel 105. The front end of the ninth longitudinal flow channel 109 is connected to the front nine flow channel openings 19, and the rear end of the ninth longitudinal flow channel 109 is connected to the rear eight flow channel openings 28; a thirteenth vertical flow channel 713 and a fourteenth vertical flow channel 714 are vertically designed in the middle of the ninth longitudinal flow channel 109. The lower end of the thirteenth vertical flow channel 713 is connected to the lower three flow channel openings 43. The thirteenth vertical flow channel 713 penetrates the ninth longitudinal flow channel 109 and then is connected to the nineteenth annular groove. The lower end of the fourteenth vertical flow channel 714 is connected to the lower five flow channel openings 45. The fourteenth vertical flow channel 714 penetrates the ninth longitudinal flow channel 109 and then is connected to the twenty-second annular groove;
[0062] The upper end of the nineteenth annular groove is connected to the sixteenth upper flow channel opening 316 through the fifteenth vertical flow channel 715, the upper end of the twenty-second annular groove is connected to the seventh upper flow channel opening 37 through the sixteenth vertical flow channel 716, and the upper end of the twenty-second annular groove is connected to the lower end of the sixteenth vertical flow channel 716 through an L-shaped flow channel;
[0063] The rear end of the tenth longitudinal flow channel 110 near the left side of the mouth is connected to the sixth longitudinal flow channel 106 through a transverse flow channel and then connected to the left first flow channel opening 51. The rear end of the tenth longitudinal flow channel 110 near the right side of the mouth is connected to the right second flow channel opening 62 through a transverse flow channel, and the rear end of the fifth longitudinal flow channel 105 near the mouth is connected to the upper side of the transverse flow channel through a vertical flow channel.
[0064] The right side of the front end of the tenth longitudinal flow channel 110 is connected to the right flow channel opening 61 through a transverse flow channel, and the transverse flow channel is also respectively connected to the upper end of the tenth vertical flow channel 710 and the middle position of the ninth longitudinal flow channel 109. The lower end of the middle position of the ninth longitudinal flow channel 109 is also connected to the lower four flow channel openings 44 through the seventeenth vertical flow channel 717.
[0065] During the production process of the thin valve body casting, a resin sand shell molding process is adopted according to the structure of the valve body, as follows:
[0066] The cavity in the sand box is made according to the product shape, and then the large sand cores of the first longitudinal flow channel 101, the second longitudinal flow channel 102, the third longitudinal flow channel 103, the fourth longitudinal flow channel 104, and the fifth longitudinal flow channel 105 and the small sand cores of the corresponding vertical flow channels, transverse flow channels, arc flow channels and other flow channels are manufactured according to the flow channel structure design of the product. Then, the large sand core of the main flow channel and the small sand cores of the other flow channels are designated to be placed in the cavity of the sand box, the sand box is closed, and molten iron is poured in from the reserved pouring riser. After waiting for cooling, the sand box is opened, the valve body casting is taken out, and the internal sand cores are cleaned and exported to complete the processing.
[0067] The large sand core and the small sand core use ordinary graphite powder coating, and the problem of subcutaneous pores can be well solved by brushing a coating containing cryolite powder on the outer surface of the sand core and using an inoculant containing 1.8% aluminum during the secondary inoculation; the inoculant needs to be dried at 300-400°C.
[0068] The pouring riser is provided with chill iron at φ90 mm, and the molten iron of the casting adopts a nodulizer containing lanthanum to increase the number of graphite balls by 2-3 times, thus solving the problem that the last solidification area of the casting cannot be compensated for shrinkage.
[0069] The sand used in the mold cavity is resin sand, in which the SiO2 content is greater than 96%, thereby ensuring the dimensional accuracy of the casting.
[0070] Determination of main index parameters of valve body:
[0071] 1) Material: HT300;
[0072] 2) Main tensile strength: ≥300MPa;
[0073] 3) Brinell hardness: 190-230 HBW;
[0074] 4) The metallographic structure shall comply with GB / T 9441-2009;
[0075] 5) No casting defects such as slag inclusion, pores, shrinkage holes, shrinkage, etc.
[0076] 6) Valve body weight: 10.7kg.
Claims
1. A thin valve body casting, characterized in that: During the production process of the thin-volume valve body casting, a mold cavity in a sand box is made according to the product shape, and then large sand cores of the first longitudinal flow channel, the second longitudinal flow channel, the third longitudinal flow channel, the fourth longitudinal flow channel, and the fifth longitudinal flow channel and small sand cores of the corresponding vertical flow channel, the transverse flow channel, the arc flow channel and other flow channels are manufactured according to the flow channel structure design of the product. Then, the large sand core of the main flow channel and the small sand cores of the other flow channels are designated to be placed in the mold cavity of the sand box, the sand box is closed, and molten iron is poured from the reserved pouring riser. After cooling, the sand box is opened, the valve body casting is taken out, and the internal sand core is cleaned and exported to complete the processing; The large sand core and the small sand core use ordinary graphite powder coating, and the coating containing cryolite powder is brushed on the outer surface of the sand core and an inoculant with an aluminum content of 1.8% is used during the secondary inoculation; the inoculant needs to be dried at 300-400°C; The thin valve body casting comprises a main body, a first longitudinal flow channel, a second longitudinal flow channel, a third longitudinal flow channel, a fourth longitudinal flow channel, and a fifth longitudinal flow channel. The main body is a rectangular body. There are 9 flow openings designed in front of the main body, namely the front one flow opening, the front two flow openings, the front three flow openings, the front four flow openings, the front five flow openings, the front six flow openings, the front seven flow openings, the front eight flow openings, and the front nine flow openings; There are 8 flow ports designed at the back of the main body, namely the rear first flow port, rear second flow port, rear third flow port, rear fourth flow port, rear fifth flow port, rear sixth flow port, rear seventh flow port, and rear eighth flow port; There are 16 flow outlets designed on the main body, namely the upper first flow outlet, the upper second flow outlet, the upper third flow outlet, the upper fourth flow outlet, the upper fifth flow outlet, the upper sixth flow outlet, the upper seventh flow outlet, the upper eighth flow outlet, the upper ninth flow outlet, the upper tenth flow outlet, the upper eleventh flow outlet, the upper twelfth flow outlet, the upper thirteenth flow outlet, the upper fourteenth flow outlet, the upper fifteenth flow outlet, and the upper sixteenth flow outlet; There are 5 flow outlets designed under the main body, namely the lower flow outlet, the lower second flow outlet, the lower third flow outlet, the lower fourth flow outlet, and the lower fifth flow outlet; There are two flow outlets designed on the left side of the main body, namely the left first flow outlet and the left second flow outlet; There are two flow outlets designed on the right side of the main body, namely the right primary flow outlet and the right secondary flow outlet; There are five longitudinal flow channels designed in the middle of the main body, from left to right, namely the first longitudinal flow channel, the second longitudinal flow channel, the third longitudinal flow channel, the fourth longitudinal flow channel, and the fifth longitudinal flow channel; The first longitudinal flow channel is designed with five annular grooves from front to back, namely, a first annular groove, a second annular groove, a third annular groove, a fourth annular groove, and a fifth annular groove; The front end of the first longitudinal flow channel is connected to the previous flow channel opening, and the rear end of the first longitudinal flow channel is connected to the next flow channel opening; two vertical flow channels are designed on the left side of the first longitudinal flow channel, namely the first vertical flow channel and the second vertical flow channel, the upper end of the first vertical flow channel is connected to the previous flow channel opening, the lower end of the first vertical flow channel is connected to the left flow channel opening through a horizontal flow channel, and the lower end of the first vertical flow channel is also connected to the next six flow channel openings through a sixth longitudinal flow channel, the upper end of the second vertical flow channel is connected to the upper eight flow channel openings, and the The lower end is connected to the left second flow channel opening and the sixth longitudinal flow channel through a horizontal flow channel, and the lower end of the second vertical flow channel is also connected to the first six flow channel openings through a longitudinal flow channel; one side of the first vertical flow channel is connected to the fifth annular groove through a flow channel, and one side of the second vertical flow channel is connected to the third annular groove through a flow channel; a first arc flow channel is also designed above the first longitudinal flow channel, and the two ends of the first arc flow channel are respectively connected to the two ends of the first longitudinal flow channel near the mouth, and the first arc flow channel is also respectively connected to the first annular groove and the fifth annular groove through a flow channel; The second longitudinal flow channel is designed with three annular grooves from front to back, namely the sixth annular groove, the seventh annular groove, and the eighth annular groove; the front end of the second longitudinal flow channel is connected to the front two flow channel openings, and the rear end of the second longitudinal flow channel is connected to the rear two flow channel openings; two vertical flow channels are designed between the first longitudinal flow channel and the second longitudinal flow channel, namely the third vertical flow channel and the fourth vertical flow channel, the upper end of the third vertical flow channel is connected to the upper two flow channel openings, the upper end of the fourth vertical flow channel is connected to the upper nine flow channel openings, the fourth annular groove is connected to the third vertical flow channel through the flow channel, the first annular groove is connected to the fourth vertical flow channel through the flow channel, the lower end of the third vertical flow channel is connected to the front seven flow channel openings through the seventh longitudinal flow channel, and the lower end of the fourth vertical flow channel is also connected to the seventh longitudinal flow channel; the upper end of the sixth annular groove is connected to the upper ten flow channel openings through the flow channel, the lower end of the second longitudinal flow channel is designed with a second arc flow channel, the rear end of the second arc flow channel is connected to the rear end of the second longitudinal flow channel near the mouth, and the front end of the second longitudinal flow channel is connected to the seventh annular groove, The third longitudinal flow channel is designed with five annular grooves from front to back, namely the ninth annular groove, the tenth annular groove, the eleventh annular groove, the twelfth annular groove, and the thirteenth annular groove; the front end of the third longitudinal flow channel is connected to the front three flow channel openings, and the rear end of the third longitudinal flow channel is connected to the rear three flow channel openings; the eleventh annular groove is connected to the eighth annular groove through a flow channel; three vertical flow channels are designed between the third longitudinal flow channel and the second longitudinal flow channel, namely the fifth vertical flow channel, the sixth vertical flow channel and the seventh vertical flow channel, the upper end of the fifth vertical flow channel is connected to the upper three flow channel openings, and the lower end of the fifth vertical flow channel is connected to the upper two flow channel openings through an inclined flow channel; the sixth ... three flow channel openings through an inclined flow channel; the sixth vertical flow channel is connected to the upper two flow channel openings through an inclined flow channel; the sixth vertical flow channel is connected to the upper two flow channel openings through an inclined flow channel. The lower end of the sixth vertical flow channel is connected to the next flow channel opening, the upper end of the sixth vertical flow channel is connected to the flow channel between the eleventh ring groove and the eighth ring groove through the flow channel; the upper end of the seventh vertical flow channel is connected to the eleventh flow channel opening, the lower end of the seventh vertical flow channel is connected to the first eight flow channel openings through the eighth longitudinal flow channel, and the rear end of the eighth longitudinal flow channel is connected to the position near the middle of the sixth vertical flow channel; the upper end of the twelfth ring groove is connected to the upper four flow channel openings through the flow channel, and the upper end of the tenth ring groove is connected to the upper twelfth flow channel opening through the flow channel; a third arc flow channel is also designed on the right side of the third longitudinal flow channel, the front end of the third arc flow channel is connected to the thirteenth ring groove, and the rear end of the third arc flow channel is connected to the ninth ring groove; The fourth longitudinal flow channel is designed with five annular grooves from front to back, namely the fourteenth annular groove, the fifteenth annular groove, the sixteenth annular groove, the seventeenth annular groove and the eighteenth annular groove; the front end of the fourth longitudinal flow channel is connected to the first four flow channel openings, and the rear end of the fourth longitudinal flow channel is connected to the rear four flow channel openings; a fourth arc flow channel is designed at the upper position between the fourth longitudinal flow channel and the third longitudinal flow channel, the fourth arc flow channel is located above the third arc flow channel, the middle upper end of the fourth arc flow channel is connected to the thirteenth flow channel openings through the eighth vertical flow channel, the rear end of the fourth arc flow channel is connected to the five flow channel openings through the eighteenth vertical flow channel, and the front end of the fourth arc flow channel is connected to the fourteenth flow channel openings through the ninth vertical flow channel; the sixteenth annular groove is connected to the middle position of the eighteenth vertical flow channel through the fifth arc flow channel; a sixth arc flow channel is also designed below the fourth longitudinal flow channel, and the sixth arc The rear end of the arc-shaped flow channel is connected to the rear end of the fourth longitudinal flow channel near the mouth, and the front end of the sixth arc-shaped flow channel is connected to the front end of the fourth longitudinal flow channel near the mouth; the upper end of the fifteenth annular groove is connected to the front end of the sixth arc-shaped flow channel through the flow channel, and the upper end of the seventeenth annular groove is connected to the rear end of the sixth arc-shaped flow channel through the flow channel; the lower end of the sixth arc-shaped flow channel is connected to the lower two flow channel openings through the tenth vertical flow channel near the middle; the lower end of the ninth vertical flow channel is connected to the upper end of the sixth annular groove through a transverse flow channel, and the upper side of the middle of the seventh vertical flow channel is connected to one side of the transverse flow channel; the two ends of the fourth longitudinal flow channel near the mouth are respectively connected to the two ends of the third longitudinal flow channel near the mouth through a transverse flow channel; the tenth longitudinal flow channel is designed at the lower rear position between the fourth longitudinal flow channel and the third longitudinal flow channel, and the rear end of the tenth longitudinal flow channel is connected to the latter seven flow channel openings; The fifth longitudinal flow channel is designed with five annular grooves from front to back, namely the 19th annular groove, the 20th annular groove, the 21st annular groove, the 22nd annular groove, and the 23rd annular groove; the front end of the fifth longitudinal flow channel is connected to the front five flow channel openings, and the rear end of the fifth longitudinal flow channel is connected to the rear five flow channel openings; the 21st annular groove is connected to the 17th annular groove through the Z-type flow channel, and the middle rear side of the Z-type flow channel is connected to the upper six flow channel openings through the 12th vertical flow channel, the 20th annular groove is connected to the 15th annular groove through the flow channel, and the middle front side of the flow channel is connected to the upper 15 flow channel openings through the 11th vertical flow channel; the lower end of the fifth longitudinal flow channel is designed with the eighth arc flow channel and the seventh arc flow channel, the rear end of the eighth arc flow channel is connected to the 23rd annular groove, the front end of the eighth arc flow channel is connected to the 19th annular groove, the rear end of the seventh arc flow channel is connected to the rear end of the fifth longitudinal flow channel near the mouth, and the front end of the seventh arc flow channel is connected to the front end of the fifth longitudinal flow channel near the mouth; A ninth longitudinal flow channel is also designed below the fourth longitudinal flow channel and the fifth longitudinal flow channel, the front end of the ninth longitudinal flow channel is connected to the front nine flow channel openings, and the rear end of the ninth longitudinal flow channel is connected to the rear eight flow channel openings; a thirteenth vertical flow channel and a fourteenth vertical flow channel are vertically designed in the middle of the ninth longitudinal flow channel, the lower end of the thirteenth vertical flow channel is connected to the lower three flow channel openings, the thirteenth vertical flow channel penetrates the ninth longitudinal flow channel and then is connected to the nineteenth annular groove, the lower end of the fourteenth vertical flow channel is connected to the lower five flow channel openings, and the fourteenth vertical flow channel penetrates the ninth longitudinal flow channel and then is connected to the twenty-second annular groove; The upper end of the nineteenth annular groove is connected to the sixteenth flow channel through the fifteenth vertical flow channel, the upper end of the twenty-second annular groove is connected to the seventh flow channel through the sixteenth vertical flow channel, and the upper end of the twenty-second annular groove is connected to the lower end of the sixteenth vertical flow channel through an L-shaped flow channel; The rear end of the tenth longitudinal flow channel near the left side of the mouth is connected to the sixth longitudinal flow channel through a transverse flow channel and then connected to the left first flow channel mouth. The rear end of the tenth longitudinal flow channel near the right side of the mouth is connected to the right second flow channel mouth through a transverse flow channel, and the rear end of the fifth longitudinal flow channel near the mouth is connected to the upper side of the transverse flow channel through a vertical flow channel. The right side of the front end of the tenth longitudinal flow channel is connected to the right flow channel opening through a transverse flow channel, and the transverse flow channel is also respectively connected to the upper end of the tenth vertical flow channel and the middle position of the ninth longitudinal flow channel. The lower end of the middle position of the ninth longitudinal flow channel is also connected to the lower four flow channel openings through the seventeenth vertical flow channel.
2. A thin valve body casting according to claim 1, characterized in that: The casting molten iron adopts a nodulizer containing lanthanum to increase the number of graphite nodules by 2-3 times.
3. A thin valve body casting according to claim 1, characterized in that: The sand used in the mold cavity is resin sand, wherein the SiO2 content is greater than 96%.