Aluminum alloy stop valve manufacturing method and aluminum alloy stop valve

Abstract

The application provides a manufacturing method of an aluminum alloy stop valve, and specifically comprises the following steps: aluminum alloy selection and smelting; casting: casting the aluminum alloy melt into an aluminum alloy rod; aluminum alloy rod homogenization treatment: placing the aluminum alloy rod obtained by cooling in step (2) into a homogenization furnace for homogenization treatment; special-shaped extrusion forming: cutting the aluminum alloy rod after the homogenization treatment into short rods, and extruding the short rods into profiles with a cross-shaped longitudinal section; (5) heat treatment strengthening; cutting and blanking: cutting the long valve seat aluminum alloy profile blank after the heat treatment strengthening into multiple aluminum alloy stop valve blanks according to the width value of the stop valve; and lathe processing into an aluminum alloy stop valve. The application adopts a pressurized forming process, directly omits the forging step in the traditional method, avoids the aluminum forging defects, greatly reduces the rejection rate, and realizes a simplified production process. In addition, the application also provides an aluminum alloy stop valve manufactured by using the above method.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of stop valves, and particularly relates to a manufacturing method of an aluminum alloy stop valve and the aluminum alloy stop valve. BACKGROUND

[0002] Currently, mainstream stop valves are made of brass, and a few are made of aluminum alloy, and the production process of the existing aluminum stop valve seat is referred to the production process of the copper stop valve: aluminum alloy smelting-casting aluminum bar-casting bar homogenization-extruding round bar-blanking-rolling graphite-heating-forging-cutting edge-shot blasting-heat treatment strengthening-machining forming, the manufacturing of the traditional copper material stop valve mainly depends on the forging process, the process applies pressure to the copper material through a forging press to cause plastic deformation, so as to obtain the required shape and size, and the complex process usually includes separate cutting of the blank, stamping pretreatment and subsequent machining. When the process is applied to the production of aluminum alloy stop valves, due to the characteristics of narrow forging temperature range, easy sticking to the mold and poor flowability of aluminum material, there are problems such as large deformation rate of the aluminum alloy valve body, difficulty in forming the flange end, many defects such as peeling, high rejection rate in the forging process, and it is difficult to forge the aluminum stop valve with the crank press and half die. SUMMARY

[0003] In view of the above problems, the application provides a manufacturing method of an aluminum alloy stop valve and the aluminum alloy stop valve.

[0004] To achieve the above-mentioned purpose, the application adopts the following technical scheme:

[0005] A manufacturing method of an aluminum alloy stop valve, specifically comprising the following steps:

[0006] (1) Selecting and smelting aluminum alloy;

[0007] (2) Casting: casting the aluminum alloy melt into an aluminum alloy bar;

[0008] (3) Homogenization treatment of the aluminum alloy bar: placing the aluminum alloy bar cooled in step (2) into a homogenization furnace for homogenization treatment;

[0009] (4) Special-shaped extrusion forming: cutting the aluminum alloy bar after the homogenization treatment in (3) into a short bar, heating the short bar to 450-550 DEG C, and using a 2000T and above positive extrusion machine to extrude the formed material, and the extrusion die temperature is controlled at 400-500 DEG C;

[0010] (5) heat treatment strengthening: after the extruded profile is water-cooled to room temperature for a certain time, after a certain time, the profile is heated to a temperature for a certain time and then kept for several hours, after a certain time, the profile is heated to a temperature for a certain time and then kept for several hours, and finally the profile is air-cooled after being taken out of the furnace, a long section valve seat aluminum alloy profile blank in the shape of a cross section is obtained, the height of the long section valve seat aluminum alloy profile blank in the vertical direction is not less than the maximum height of the stop valve in the vertical direction, the width of the long section valve seat aluminum alloy profile blank is not less than the width of the stop valve, the height is the height of the longitudinal section of the long section valve seat aluminum alloy profile blank, and the width is the width of the longitudinal section of the long section valve seat aluminum alloy profile blank;

[0011] (6) cutting and blanking: the long section valve seat aluminum alloy profile blank after the heat treatment strengthening is cut into a plurality of aluminum alloy stop valve blanks according to the width value of the stop valve;

[0012] (7) turning into an aluminum alloy stop valve.

[0013] In this way, the pressurized forming process is adopted, and the forging step in the traditional method is directly omitted, the disadvantages of aluminum forging are avoided, the scrap rate is greatly reduced, and a simplified production process is realized.

[0014] Further, in step (6), when the stop valve is a stop valve integrated with a flange, the width is the width in the direction along the center axis of the valve nozzle mouth, and when the stop valve and the flange are in a split structure, the width is the width in the direction perpendicular to the center axis of the valve nozzle mouth and the center axis of the valve core mouth.

[0015] In this way, the width of the blank is reduced to the actual width of the valve body when the blank is cut, thereby significantly saving the use of materials.

[0016] Further, the aluminum alloy stop valve is an integrated aluminum alloy stop valve with a valve seat and a flange, the transverse part in the cross-shaped aluminum alloy stop valve blank obtained in step (6) is a flange forming part, the vertical part in the cross-shaped aluminum alloy stop valve blank is a valve body forming part, the width of the transverse part is greater than the width of the vertical part, the valve body forming part includes a valve body first forming part below the flange plate forming part and a valve body second forming part above the flange plate forming part, the valve body first forming part is used for the forming of the connecting pipes below the flange, and the valve body second forming part is used for the forming of the valve pipe above the flange, the connecting pipes on the left and right sides of the valve pipe, and the reinforcing part; the shape of the valve body first forming part is a cuboid.

[0017] In this way, the outer periphery of the aluminum alloy stop valve blank with this shape structure is a regular plane or a circular arc surface, has good machining positioning capacity, is convenient for machining clamp design, can achieve extremely high machining precision, and ensures good sealing performance.

[0018] Further, the second forming part of the valve body comprises a vertical main body part for forming the reinforcing part and the valve pipe, two circular-arc-shaped outer protrusions and two rectangular outer protrusions are symmetrically arranged from bottom to top on both sides of the vertical main body part in the width direction, the two circular-arc-shaped outer protrusions are arranged at intervals from the flange plate, the center of the circle of the upper circular arc of the two circular-arc-shaped outer protrusions is the center point of the forming part of the valve body in the height direction, and is located on the center axis of the left and right side connecting pipes of the valve pipe, and the diameter of the circular-arc-shaped outer protrusion is not less than the diameter of the outer thread on the left and right side connecting pipes of the valve pipe; the two rectangular outer protrusions are located at the upper part of the vertical main body part, the upper end surface of the rectangular outer protrusion is located in the same plane as the upper end surface of the vertical main body part, and the rectangular outer protrusion is used for thread forming machining of the cap of the valve pipe.

[0019] In this way, the shape of the aluminum alloy stop valve is set as a special structure shape, the position of the circular-arc-shaped outer protrusion is set to facilitate the determination of the machining position of the second connecting pipe and the third connecting pipe during machining, the rectangular outer protrusion is set to facilitate the determination of the machining height of the cap mounting position during machining, and the machining precision of the stop valve is improved; while improving the manufacturing precision and production efficiency of the aluminum alloy stop valve, the structural strength of the aluminum alloy stop valve is ensured.

[0020] Further, the aluminum alloy stop valve is a split type aluminum alloy stop valve with a split valve seat and flange, comprising a valve pipe, a first connecting pipe, a second connecting pipe, a third connecting pipe, a reinforcing part, a flange mounting part and a flange, and the aluminum alloy stop valve blank obtained in step (6) is a valve body forming part, the valve body forming part comprises a reinforcing part forming part, a valve body forming part located on the upper and lower sides of the reinforcing part forming part, a first connecting pipe forming part, and a second connecting pipe forming part and a second connecting pipe forming part located on the left and right sides of the reinforcing part forming part.

[0021] In this way, when the aluminum alloy stop valve and the flange are in a split structure, the aluminum alloy stop valve blank only needs to be extruded into a long strip cross structure, then cut according to the width of the valve body, and then machined into a valve seat structure, and the valve seat structure is additionally provided with a flange plate, so that the effect of a traditional stop valve can be achieved.

[0022] Further, a first part body and a flange mounting part are sequentially arranged from top to bottom between the reinforcing part forming part and the first connecting pipe forming part, and the sizes of the first part body and the flange mounting part match the corresponding part structure of the aluminum alloy stop valve.

[0023] In this way, the first part body and the mounting part are directly extruded on the aluminum alloy stop valve blank, reducing the amount of machining in the machining stage and improving production efficiency.

[0024] Further, the reinforcing part forming part is provided with a third part body forming part at the upper part of the side of the valve body forming part close to the third connecting pipe, and the upper end surface of the third part body forming part is higher than the upper end surface of the third connecting pipe forming part.

[0025] In this way, when the male pressure forming is performed, the height difference between the two parts facilitates accurate determination of the machining position of the third connecting pipe in the machining stage, thereby improving the machining precision and efficiency of the stop valve.

[0026] Further, the reinforcing part forming part is connected to the upper end face of the valve body forming part near the third connecting pipe and the third connecting pipe forming part through a downwardly inclined slope.

[0027] In this way, the transition connection between the reinforcing part forming part and the third connecting pipe forming part through the slope can clearly show the boundary between the third part body and the extension part, thereby facilitating the formation of the third part body and the accurate positioning machining of the extension part during machining.

[0028] Further, the reinforcing part forming part is located in the same plane as the upper end face of the valve body forming part near the second connecting pipe and the second connecting pipe forming part; the length of the first connecting pipe forming part in the cross-shaped transverse direction is greater than the length of the flange mounting part, and the upper part of the width direction side of the first connecting pipe forming part is connected to the lower end of the mounting part through an outwardly inclined slope.

[0029] In this way, the length difference between the mounting part and the first connecting pipe forming part makes the boundary between the mounting part and the first connecting pipe forming part prominent, thereby facilitating the cutting machining and positioning of the first connecting pipe forming part during machining.

[0030] Further, an extension part forming part is arranged between the reinforcing part forming part and the valve body forming part, the extension part forming part is coaxially arranged with the valve body forming part, the length of the extension part forming part in the cross-shaped transverse direction is less than the width of the valve body forming part, and the lower part of the valve body forming part in the width direction is connected to the upper end of the extension part forming part through an inwardly inclined slope.

[0031] In this way, on the one hand, the length difference between the extension part forming part and the valve body forming part makes the boundary between the two prominent, thereby facilitating quick and accurate positioning during machining and improving production efficiency, and on the other hand, meeting the size requirements of the cap thread machining and the cap torque strength.

[0032] An integrated aluminum alloy stop valve manufactured according to the above method.

[0033] A combined aluminum alloy stop valve manufactured according to the above method.

[0034] Further, the flange is provided with a flange mounting hole, and the flange mounting part is inserted into the flange mounting hole; transition arcs are arranged at four corners of the flange mounting hole, and the angle of the arcs is greater than 90 degrees; the flange is a symmetric double-hole structure; the length of the flange mounting hole is set as J, the length of the mounting part is set as j, and I and i satisfy the relationship: 0.1≤J-j≤0.3mm; the width of the flange mounting hole 23 is set as A, the width of the mounting part 14 is set as a, and A and a satisfy the relationship: 0.1≤I-i≤0.3mm.

[0035] In this way, on the one hand, the transition arcs are arranged at the four corners of the flange mounting hole, and the angle of the arcs is greater than 90 degrees, so that the flange can be smoothly assembled with the valve body; on the other hand, the flange mounting hole and the mounting part have a certain gap in the width direction, so that the flange can be easily mounted on the mounting part, and meanwhile, the gap is not too large, so that the flange has sufficient strength after welding.

[0036] Compared with the prior art, the present application has the following beneficial effects:

[0037] 1. The profile after heat treatment strengthening can be directly purchased, and the processing manufacturer only needs to complete the blanking and machining processes, so that 5 processes can be saved compared with the traditional process flow, the equipment, site and labor input are reduced, the production cost is reduced, and the production efficiency is improved;

[0038] 2. The raw material manufacturer uniformly performs heat treatment on the profile, so that the heat treatment space can be saved compared with the previous blank heat treatment, and the transportation is more convenient;

[0039] 3. The aluminum alloy material has low price and light quality; the aluminum alloy has good plasticity, and can produce complex profiles, so that the blank of the stop valve is made by extruding the profile, and the blank is machined into a valve seat;

[0040] 4. The aluminum stop valve has a lower sealing torque: the aluminum alloy material is soft, and the sealing torque and the valve core sealing torque are smaller, which is only about 60% of the current copper stop valve joint;

[0041] 5. The method eliminates the forging process, and greatly reduces the scrap rate. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 The structure of the aluminum alloy stop valve profile blank of the integrated aluminum alloy stop valve is shown in the embodiment of the present application.

[0043] Figure 2 The structure size of the aluminum alloy stop valve profile blank of the integrated aluminum alloy stop valve is shown in the embodiment of the present application.

[0044] Figure 3 The structure of the integrated aluminum alloy stop valve is shown in the embodiment of the present application.

[0045] Figure 4 A top view of the integrated aluminum alloy stop valve according to an embodiment of the present application;

[0046] Figure 5 A schematic view of the aluminum alloy stop valve profile blank of the split-type aluminum alloy stop valve according to an embodiment of the present application.

[0047] Figure 6 A dimensioned view of the aluminum alloy stop valve profile blank of the split-type aluminum alloy stop valve according to an embodiment of the present application.

[0048] Figure 7 A schematic view of the split-type aluminum alloy stop valve according to an embodiment of the present application;

[0049] Figure 8 A sectional view of the split-type aluminum alloy stop valve according to an embodiment of the present application;

[0050] Figure 9 A top view of the split-type aluminum alloy stop valve according to an embodiment of the present application;

[0051] Figure 10 A top view of the valve body of the split-type aluminum alloy stop valve according to an embodiment of the present application;

[0052] Figure 11 A schematic view of the flange of the split-type aluminum alloy stop valve according to an embodiment of the present application;

[0053] Figure 12 A top view of the flange of the split-type aluminum alloy stop valve according to an embodiment of the present application;

[0054] Figure 13 A longitudinal sectional view of the flange of the split-type aluminum alloy stop valve according to an embodiment of the present application.

[0055] Wherein, 51-flange forming portion, 52-first forming portion, 53-valve body second forming portion, 531-vertical main body portion, 532-circular arc-shaped outer protruding portion, 533-rectangular outer protruding portion, 40-valve body forming portion, 41-strengthening portion forming portion, 42-valve body forming portion, 43-first connecting pipe forming portion, 44-second connecting pipe forming portion, 45-third connecting pipe forming portion, 46-third body forming portion, 10-valve body, 11-valve body, 111-valve cavity, 112-valve port, 11a-cap mounting position, 12-strengthening portion, 121-first body, 122-second body, 123-third body, 124-extended portion, 13-valve pipe, 131-first connecting pipe, 132-second connecting pipe, 132a-joint mounting position, 133-third connecting pipe, 14-flange mounting portion, 20-flange, 23-flange hole, 20a-inner angle, 14a-upper end. DETAILED DESCRIPTION

[0056] It should be noted that the embodiments and features in the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0057] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0058] In the present application, unless otherwise specified, the orientation words such as "up, down" are generally directed to the directions shown in the drawings, or are directed to the vertical, perpendicular or gravity directions; similarly, for the convenience of understanding and description, "left, right" are generally directed to the left and right shown in the drawings; "inner, outer" refer to the inner and outer relative to the contour of each component itself, but the above orientation words are not used to limit the present application.

[0059] In order to solve the problems of large deformation rate, difficulty in forming the end of the flange, many defects such as skinning, and high rejection rate in the forging process in the manufacturing process of the aluminum alloy stop valve in the prior art, and the problem of difficulty in forging the aluminum stop valve by using a crank press matched with a half die in the existing manufacturing method, the present application provides an aluminum alloy stop valve manufacturing method and an aluminum alloy stop valve manufactured by using the method.

[0060] An aluminum alloy stop valve manufacturing method, specifically comprising the following steps:

[0061] (1) Selecting and melting aluminum alloy;

[0062] (2) Casting: casting the aluminum alloy melt into an aluminum alloy rod;

[0063] (3) Homogenizing treatment of the aluminum alloy rod: placing the aluminum alloy rod obtained by cooling in step (2) into a homogenizing furnace for homogenizing treatment; the 6061 aluminum alloy is heated from room temperature to 520-540℃ within 3h, kept for 12h, then cooled to 300℃ in the furnace, and then air-cooled to room temperature;

[0064] (4) Special-shaped extrusion forming: cutting the aluminum alloy rod after homogenizing treatment in (3) into a short rod, heating the short rod to 450-550℃, and using a 2000T and above direct extruder to extrude a formed material, with the extrusion die temperature controlled at 400-500℃; the extrusion forming parameters used in this step are the same for different aluminum alloy materials;

[0065] (5) heat treatment strengthening: after the extruded profile is water-cooled to room temperature within 20 seconds, it is heated to 180℃ within 30 minutes and kept for 2 hours within 12 hours, then heated to 220℃ within 10 minutes and kept for 2 hours, after which it is air-cooled, to obtain a long-section valve seat aluminum alloy profile blank in the shape of a cross section in vertical section, the height h of the long-section valve seat aluminum alloy profile blank in vertical section is not less than the maximum height of the stop valve in vertical section, and the width g of the long-section valve seat aluminum alloy profile blank is not less than the width of the stop valve, the height g being the height of the long-section valve seat aluminum alloy profile blank in vertical section, and the width g being the width of the long-section valve seat aluminum alloy profile blank in vertical section;

[0066] (6) cutting and blanking: the long-section valve seat aluminum alloy profile blank after heat treatment strengthening is cut into a plurality of aluminum alloy stop valve blanks according to the width value of the stop valve, when the stop valve is a flange-integrated stop valve, the width is the width m in the direction along the center axis of the stop valve nozzle, and when the stop valve and the flange are in a split structure, the width is the width n perpendicular to the center axis of the nozzle and the center axis of the valve core, i.e. the width L4 of the flange mounting portion;

[0067] (7) turning into an aluminum alloy stop valve.

[0068] In step (1), the selected aluminum alloy is a heat-treatable aluminum alloy, which can be a 2-series, 6-series or 7-series aluminum alloy, and the temperature and time parameters during smelting are determined according to the selected aluminum alloy material model.

[0069] In step (2), the smelting body temperature required for casting the aluminum alloy smelting body into an aluminum rod is determined according to the selected aluminum alloy model

[0070] To ensure the organization and performance of the profile, the cast rod needs to be homogenized, and in step (3), different homogenization process conditions are adopted according to the selected aluminum alloy model, for example, when 6061 aluminum alloy is selected, the aluminum alloy rod is first heated to 520-540℃ within 3 hours and kept for 12 hours, then cooled to 300℃ in the furnace, and then air-cooled to room temperature.

[0071] It can be understood that the present application adopts a press forming process, directly omitting the forging step in the traditional method, avoiding the technical problems of large deformation rate of forged aluminum stop valves, difficulty in forming the flange end, many defects such as peeling, and high rejection rate in the forging process caused by the narrow aluminum forging temperature range, easy sticking to the mold and poor flowability, greatly reducing the rejection rate, and at the same time realizing a simplified production process.

[0072] By using the manufacturing method, the aluminum alloy raw material manufacturer can uniformly extrude the stop valve profile blank into the required shape in advance, and then uniformly heat treat the extruded profile blank, so that the stop valve manufacturer only needs to complete the blanking and machining processes, on the one hand, compared with the previous blank heat treatment, the heat treatment space can be saved, and the transportation is more convenient, on the other hand, compared with the traditional process, 5 processes can be saved, the equipment, site and labor input are reduced, the production cost is reduced, and the production efficiency is improved.

[0073] In an embodiment, the stop valve manufactured according to the above method is an integrated aluminum alloy stop valve integrally provided with a flange, specifically, the aluminum alloy stop valve comprises a valve body 10, the valve body 10 comprises a valve pipe 11, a reinforcing part 12, a valve pipe 13 and a flange. Wherein, the valve pipe 11 is provided with a valve cavity 111 and a valve port, the valve pipe 13 is connected to the valve pipe 11, the reinforcing part 12 is arranged on the valve pipe 11 and corresponds to the position of the valve port. The reinforcing part 12 extends to the valve pipe 13 and protrudes from the outer wall of the valve pipe 11, and the reinforcing part 12 is connected to the valve pipe 13, and the reinforcing part 12 and the valve pipe 11 covered by the reinforcing part 12 are in the shape of a cuboid.

[0074] The valve pipe 13 comprises a first connecting pipe 131, a second connecting pipe 132 and a third connecting pipe 133, the first connecting pipe 131 is coaxially arranged with the valve pipe 11, the second connecting pipe 132 and the third connecting pipe 133 are both arranged perpendicularly to the valve pipe, and the third connecting pipe 133 is coaxially arranged with the second connecting pipe 132. The second connecting pipe 132 is provided with a joint mounting position 132a, and the joint nut is connected to the joint mounting position 132a during installation, the axis of the valve port is coaxially arranged with the valve pipe 11, and the axis of the second connecting pipe 132 is intersectingly arranged with the axis of the valve port.

[0075] The reinforcing part 12 comprises a first part 121 and a second part 122. Wherein, the first part 121 extends from the valve body 11 to the first connecting pipe 131 and is connected to the first connecting pipe 131. The second part 122 extends from the valve body 11 to the second connecting pipe 132 and is connected to the second connecting pipe 132. Preferably, the first connecting pipe 131 is coaxially arranged with the valve body 11, and the second connecting pipe 132 is arranged perpendicularly to the valve body.

[0076] Further, the cross section of the first part 121 is in the shape of a rectangle. Of course, in other embodiments, the cross section of the first part 121 can also be arranged in other shapes, which can be selected according to actual needs.

[0077] Further, the cross section of the second part 122 is in the shape of a rectangle. Of course, in other embodiments, the cross section of the first part 121 can also be arranged in other shapes, which can be selected according to actual needs.

[0078] Specifically, the second connecting pipe 132 is provided with a joint mounting position 132a, and the joint nut is connected to the joint mounting position 132a during installation. The axis of the valve port 112 is coaxially arranged with the valve body 11, and the axis of the second connecting pipe 132 is intersectingly arranged with the axis of the valve port 112.

[0079] The top of the valve pipe 11 is provided with a cap mounting position 11a, and the cap is connected to the cap mounting position 11a during installation. The top of the reinforcing portion 12 is provided with an extension portion 124 extending from the reinforcing portion 12 to the cap mounting position 11a. The cross section of the extension portion 124 is rectangular. Of course, in other embodiments, the cross section of the first portion 121 can also be provided with other shapes, which can be selected according to actual needs.

[0080] The flange 20 is arranged below the lower end surface of the reinforcing portion 12, and the flange 20 is an integral structure with the valve body 10, and the length direction of the flange 20 extends along the front and back direction of the reinforcing portion 12.

[0081] In this embodiment, when the aluminum alloy stop valve is manufactured by the method of this embodiment, the longitudinal section of the aluminum alloy stop valve blank obtained in step (6) is in a cross shape, including a flange forming portion 51 and a valve body forming portion, the flange forming portion 51 is a horizontal portion in the cross shape, and the valve body forming portion is a vertical portion in the cross shape. The relative position of the center point of the height direction of the flange forming portion 51 and the valve body forming portion is determined according to the structure of the aluminum alloy stop valve to be manufactured. In this embodiment, the flange forming portion 51 is located in the middle and lower part of the valve body forming portion.

[0082] Specifically, the valve body forming portion includes a valve body first forming portion 52 located below the flange forming portion 51 and a valve body second forming portion 53 located above the flange forming portion 51, the valve body first forming portion 52 is used for forming the first connecting pipe 131 opposite to the valve pipe, and the valve body second forming portion 53 is used for forming the valve pipe, the second connecting pipe and the third connecting pipe located on the left and right sides of the valve pipe, and the reinforcing portion.

[0083] In this embodiment, the shape of the valve body first forming portion 52 is a rectangular parallelepiped, and of course in other embodiments, the valve body first forming portion 52 can also be other shapes, as long as it meets the forming size requirements of the first connecting pipe 131.

[0084] It can be understood that the outer periphery of the aluminum alloy stop valve blank with such a shape structure is a regular plane or a circular arc surface, has good machining positioning ability, is convenient for machining clamp design, can achieve very high machining precision, and ensures good sealing performance.

[0085] In the embodiment, the second forming part 53 of the valve body comprises a vertical main body part 531, two circular-arc-shaped outer convex parts 532 and two rectangular outer convex parts 533 are symmetrically arranged on both sides of the vertical main body part 531 from bottom to top, the two circular-arc-shaped outer convex parts 532 are arranged at intervals from the flange plate, the center of the circle of the circular-arc-shaped outer convex part 532 is the center point of the forming part of the valve body in the height direction, and is located on the central axis of the second connecting pipe 132 and the third connecting pipe 133, the diameter of the circular-arc-shaped outer convex part 532 is not less than the diameter of the outer thread of the second connecting pipe 132, and the circular-arc-shaped outer convex part 532 forms the second extension part 122 after machining.

[0086] It can be understood that the shape of the aluminum alloy stop valve is set as a special structure shape, the position of the circular-arc-shaped outer convex part 532 is set to facilitate the determination of the machining position of the second connecting pipe 132 and the third connecting pipe 133 during machining, and the setting of the rectangular outer convex part 533 facilitates the determination of the machining height of the cap mounting position during machining, thereby improving the machining precision of the stop valve.

[0087] Specifically, the vertical distance between the center point of the forming part of the valve body in the height direction and the bottom end surface of the flange forming part 51 is defined as the center height A, the vertical distance between the center point of the forming part of the valve body in the height direction and the upper end surface thereof is defined as the total height B, the width of the vertical main body part 531 is defined as the neck length D, the sum of the widths of the vertical main body part 531 and the two rectangular outer convex parts 533 is defined as the thread matching part width C, the radius of the circular-arc-shaped outer convex part 532 is defined as the joint thread outer diameter E, the vertical distance between the lower end surface of the flange forming part 51 and the lower end surface of the valve body forming part is defined as the boss height F, and the thickness of the flange forming part 51 is G.

[0088] The size of the center height A must ensure that the joint nut can be assembled, the size of the total height B must meet the requirements of the valve core installation, the size of the thread matching part width C must meet the size requirements required by the cap thread machining, the size of the neck length D must meet the size requirements required by the cap torque strength, the size of the joint thread outer diameter E must meet the size requirements required by the joint thread machining, the size of the boss height F must meet the size requirements required to ensure the strength of the valve body after welding, and the size of the flange thickness G must meet the size requirements required to ensure the strength of the flange. The size of each of the above dimensions is determined according to the size of the nominal diameter, and according to the different size ranges of the nominal diameter, the size of each of the above dimensions must meet the size range shown in Table 1.

[0089] Table 1

[0090] Nominal bore mm A B C D E F G 4-5 ≥9 ≥12 ≥16 ≥15 > φ 10 ≥6 ≥3 7-8 ≥10 ≥15 ≥16 ≥15 > φ 15 ≥6 ≥3 9-11 ≥11 ≥18 ≥16 ≥15 > φ 18 ≥6 ≥3 12-13 ≥12 ≥21 ≥19 ≥18 > φ 20 ≥6 ≥4 15-16 ≥13 ≥24 ≥19 ≥18 > φ 25 ≥6 ≥4 16-20 ≥24 ≥27 ≥21 ≥20 > φ 30 ≥6 ≥5

[0091] It can be understood that the setting of the structure size requires that the subsequent machining amount be minimized to the maximum extent under the premise of ensuring the machining precision and structural strength of the stop valve structure.

[0092] In another embodiment, the stop valve manufactured according to the above method is a combined aluminum alloy stop valve provided separately from a flange. Specifically, the aluminum alloy stop valve includes a valve body 10, which includes a valve body 11, a reinforcing portion 12, and a valve pipe 13. The valve body 11 is provided with a valve cavity 111 and a valve port 112. The valve pipe 13 is connected to the valve body 11. The reinforcing portion 12 is provided on the valve body 11 and is arranged at a position corresponding to the valve port 112. The reinforcing portion 12 extends toward the valve pipe 13 and protrudes from the outer wall of the valve body 11, and the reinforcing portion 12 is connected to the valve pipe 13.

[0093] The reinforcing portion 12 covers the outer side of the valve body 11, and the reinforcing portion 12 and the valve body 11 covered thereby are in the shape of a cuboid.

[0094] The valve body 11, the reinforcing portion 12, and the valve pipe 13 are in an integrated structure, which means that they are machined at one time by turning, cutting, or other machining methods. The valve cavity 111 penetrates the valve body 11 in the height direction Z of the valve body 11, the valve pipe 13 is a hollow structure and is in communication with the valve cavity 111, and the valve port 112 is arranged at a position close to the connection between the valve pipe 13 and the valve cavity 111, which is the position of the linear sealing mentioned above.

[0095] Specifically, the valve pipe 13 includes a first connecting pipe 131 and a second connecting pipe 132. The reinforcing portion 12 includes a first portion 121 and a second portion 122. The first portion 121 extends from the valve body 11 to the first connecting pipe 131 and is connected to the first connecting pipe 131. The second portion 122 extends from the valve body 11 to the second connecting pipe 132 and is connected to the second connecting pipe 132. Preferably, the first connecting pipe 131 is coaxially arranged with the valve body 11, and the second connecting pipe 132 is arranged perpendicularly to the valve pipe.

[0096] Further, the cross section of the first portion 121 is in the shape of a rectangle. Of course, the cross section of the first portion 121 can also be arranged in other shapes in other embodiments, which can be selected according to actual needs.

[0097] Further, the cross section of the second portion 122 is in the shape of a rectangle. Of course, the cross section of the first portion 121 can also be arranged in other shapes in other embodiments, which can be selected according to actual needs.

[0098] Specifically, the second connecting pipe 132 is provided with a connector mounting position 132a, and the connector nut is connected to the connector mounting position 132a during installation. The axis of the valve port 112 is coaxially arranged with the valve body 11, and the axis of the second connecting pipe 132 is arranged to intersect the axis of the valve port 112.

[0099] In an embodiment, the valve pipe 13 further comprises a third connecting pipe 133, which is coaxially arranged with the second connecting pipe 132, and the first connecting pipe 131 is coaxially arranged with the valve pipe. The reinforcing part 12 further comprises a third part body 123, which extends from the valve body 11 to the third connecting pipe 133 and is connected to the third connecting pipe 133. Further, the cross section of the third part body 123 is rectangular. Of course, in other embodiments, the cross section of the first part body 121 can also be provided in other shapes, which can be selected according to actual needs.

[0100] Further, the top of the valve body 11 is provided with a cap mounting position 11a, and the cap is connected to the cap mounting position 11a during installation. The reinforcing part 12 is provided with an extension part 124, which extends from the reinforcing part 12 to the direction of the cap mounting position 11a, and the cross section of the extension part 124 is rectangular. Of course, in other embodiments, the cross section of the first part body 121 can also be provided in other shapes, which can be selected according to actual needs.

[0101] In this embodiment, in order to ensure that the flange can be installed into the valve seat and meet the matching gap requirement, a transition arc is arranged at four corners of the flange mounting hole, and the angle of the arc is greater than 90°. The flange is a symmetric double-hole structure. Of course, in other embodiments, the flange can also adopt various mounting hole forms such as single-hole single-side, double-hole single-side, etc., which can be selected according to actual needs.

[0102] Further, the length of the flange mounting hole 23 is set as L1, the length of the flange mounting part 14 is set as L2, and B and b satisfy the relationship: 0.1≤L1-L2≤0.3mm. Further, there is a certain gap between the flange mounting hole 23 and the flange mounting part 14 in the width direction, which ensures that the flange 20 can be easily installed onto the flange mounting part 14, and at the same time, the gap is not too large, which ensures that the flange 20 has sufficient strength after welding. The value of L1-L2 can be 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, etc. Of course, the value of L1-L2 can also be selected according to actual conditions, which will not be described here.

[0103] Further, the width of the flange mounting hole 23 is set as L3, the width of the flange mounting portion 14 is set as -L4, A and a satisfy the relationship: 0.1≤L3-L4≤0.3mm. Further, the flange mounting hole 23 and the flange mounting portion 14 have a certain gap in the length direction, which ensures that the flange 20 can be easily mounted on the flange mounting portion 14, and at the same time the gap is not too large, which ensures that the flange 20 has sufficient strength after welding. The value of L3-L4 can be 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, etc. Of course, the value of L3-L4 can also be selected according to the actual situation, which is not described here.

[0104] Preferably, the thickness of the flange 20 is set as D3, D3≥5mm. The value of D3 can be 5mm, 10mm, 15mm, 20mm, etc. Of course, the value of D3 can also be selected according to the actual situation, which is not described here.

[0105] Specifically, the shape of the flange mounting hole 23 can be set and is not limited to oval, rectangular, square, in this embodiment, the flange mounting hole 23 is set as a rectangular shape, and preferably as a rectangular shape.

[0106] As a preferred, the inner corner 20a of the flange mounting hole 23 is set as a chamfer structure. The chamfer structure means that the inner corner 20a is processed as a chamfer, and the angle of the chamfer can be selected according to actual needs, which is not limited here. Since the straight angle cannot be formed by profile extrusion, there will be a certain arc on the valve body 11, the reinforcing portion 12 and the flange mounting portion 14, so the inner corner 20a of the flange mounting hole 23 is set as a chamfer, which ensures that the flange 20 can be smoothly assembled with the valve body 10.

[0107] As a preferred, the upper end 14a of the flange mounting portion 14 is also processed as a chamfer, which facilitates the installation of the flange 20, and the angle of the chamfer can be selected according to actual needs, which is not limited here.

[0108] In this embodiment, when the combined aluminum alloy stop valve is manufactured by the method of this embodiment, the longitudinal section of the aluminum alloy stop valve blank obtained in step (6) is in the shape of a cross, including a valve body forming portion 40, the valve body forming portion 40 includes a reinforcing portion forming portion 41, a valve body forming portion 42 and a first connecting pipe forming portion 43 located at the upper and lower ends of the reinforcing portion forming portion 41, and a second connecting pipe forming portion 44 and a third connecting pipe forming portion 45 located at the left and right sides of the reinforcing portion forming portion 41.

[0109] It can be understood that when the aluminum alloy stop valve and the flange are a split structure, the aluminum alloy stop valve blank only needs to be extruded into a long cross structure, then cut according to the width of the valve body, and then machined into a valve seat structure. The flange plate is additionally arranged on the valve seat structure, so that the effect of the traditional stop valve can be achieved. Compared with the traditional stop valve blank structure with a double cross structure (both the front view and the top view are cross-shaped), the present application only maintains a cross-shaped structure in the front view, and the width of the blank is reduced to the actual width of the valve body when cutting, thereby significantly saving material use.

[0110] Further, a first part body 121 is arranged on the lower part of the reinforcing part forming part 41, and a flange mounting part 14 is arranged on the lower end surface of the first part body 121.

[0111] It can be understood that the first part body 121 and the flange mounting part 14 are directly extruded on the aluminum alloy stop valve blank, reducing the processing amount in the machining stage and improving the production efficiency.

[0112] The upper end of the flange mounting part 14 is connected to the first part body 121, which is designed as a chamfer. This further reduces the processing amount in the machining stage and improves the production efficiency.

[0113] Further, the reinforcing part forming part 41 is arranged on the upper part of the valve body forming part 42 near the third connecting pipe 133, and the third part body forming part 46 is arranged on the upper end surface of the third part body forming part 46. The upper end surface of the third connecting pipe forming part 45 is higher than the upper end surface of the third connecting pipe forming part 45. It can be understood that when the two parts are formed under the action of the pressure, the height difference facilitates accurate determination of the processing position of the third connecting pipe 133 in the machining stage, thereby improving the machining precision and machining efficiency of the stop valve.

[0114] In the present embodiment, in order to facilitate the formation of the third part body and the accurate positioning of the extension part during machining, the upper end surface of the reinforcing part forming part 41 located on the side of the valve body forming part 42 near the third connecting pipe 133 is connected to the third connecting pipe forming part 45 through a downward inclined slope. Of course, in other embodiments, the reinforcing part forming part 41 and the third connecting pipe forming part 45 can be connected through other transition forms, which can be selected according to actual needs.

[0115] Further, the reinforcing portion forming portion 41 is located on the same plane as the second connector forming portion 44 on the upper end surface of the valve body forming portion 42 close to the second connector 132. It can be understood that, since the second portion and the third portion and the extension portion are mirror-symmetrically arranged on both sides of the valve body forming portion 42 relative to the center axis of the valve body forming portion 42, one side can be omitted in the case of setting a precision positioning division line. Of course, in other embodiments, a height difference can also be provided between the upper end surface of the reinforcing portion forming portion 41 and the upper end surface of the second connector forming portion 44, and a transition connection in the form of an inclined surface or other forms is adopted, which can be selected according to actual needs.

[0116] In the present embodiment, the first connector forming portion 43 is located below the flange mounting portion 14, the length of the first connector forming portion 43 is greater than the length of the flange mounting portion 14, and the upper part of the width direction side surface of the first connector forming portion 43 is connected to the lower end of the flange mounting portion 14 through an inclined surface inclined from outside to inside. It can be understood that the length difference between the flange mounting portion 14 and the first connector forming portion 43 makes the boundary line between the flange mounting portion 14 and the first connector forming portion 43 prominent, facilitating the cutting and processing positioning of the first connector forming portion 43 during machining, and on the other hand, ensuring that the welding position after machining has sufficient wall thickness.

[0117] In the present embodiment, an extension portion forming portion 47 is provided on the upper part of the reinforcing portion forming portion 41, the extension portion forming portion 47 is located directly below the valve body forming portion 42 and coaxially arranged with the valve body forming portion 42, the length of the extension portion forming portion 47 is less than the width of the valve body forming portion 42, and the lower part of the valve body forming portion 42 in the width direction is connected to the upper end of the extension portion forming portion 47 through an inclined surface inclined inward. The valve body forming portion 42 is used for forming the valve pipe and the cap mounting position. It can be understood that, on the one hand, the length difference between the extension portion forming portion 47 and the valve body forming portion 42 makes the boundary line between the two prominent, facilitating quick and accurate positioning during machining and improving production efficiency, on the other hand, meeting the size requirements of cap thread processing and cap torque strength.

[0118] The vertical distance between the center point of the valve body forming part 40 in the height direction and the bottom end surface of the third connecting pipe forming part 45 is defined as the center height a, the vertical distance between the center point of the valve body forming part 40 in the height direction and the upper end surface thereof is defined as the total height b, the length of the extension forming part 47 is defined as the neck length d, the length of the valve body forming part is defined as the threaded fitting part width c, the width of the third connecting pipe forming part 45 is e, and the height of the first connecting pipe forming part 43 is defined as the boss height f. The center height a must be large enough to allow the joint nut to be assembled, the total height b must be large enough to meet the requirements of the valve core installation, the threaded fitting part width c must meet the size requirements of the cap threading, the neck length d must meet the size requirements of the cap torque strength, the width e of the third connecting pipe forming part 45 must meet the size requirements of the joint threading, and the boss height f must meet the size requirements of the post-welding valve body strength.

[0119] The size of each of the above dimensions is determined according to the size of the nominal diameter, and according to the size range of the nominal diameter, each of the above dimensions must meet the size range shown in Table 2.

[0120] Table 2

[0121] Nominal bore mm a b c d e f 4-5 ≥9 ≥12 ≥16 ≥15 > φ 10 ≥6 7-8 ≥10 ≥15 ≥16 ≥15 > φ 15 ≥6 9-11 ≥11 ≥18 ≥16 ≥15 > φ 18 ≥6 12-13 ≥12 ≥21 ≥19 ≥18 > φ 20 ≥6 15-16 ≥13 ≥24 ≥19 ≥18 > φ 25 ≥6 16-20 ≥24 ≥27 ≥21 ≥20 > φ 30 ≥6

[0122] It can be understood that the setting of the above structure size requires that, under the premise of ensuring the machining precision and structural strength of the stop valve, the subsequent machining amount is maximally reduced.

[0123] Obviously, the above-described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative labor should belong to the protection scope of the present application.

[0124] It should be noted that the terms used herein are only intended to describe specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should also be understood that, when the terms "comprise" and / or "include" are used in the specification, there is a feature, step, work, device, component and / or combination thereof.

[0125] It should be noted that the terms "first", "second", and the like, used in the description and in the claims of the present application as well as above-mentioned figures are used to distinguish between similar objects and not necessarily for describing a specific sequential or chronological order. It is to be understood that the use of data so designated is not meant to limit a given item described by such data to the same category as other data designated by the same designations, but instead is so designated only for convenience as a means of discriminating between the two series of items that refer to a same data.

[0126] The preferred embodiments of the application described herein are examples of the present application and are not intended to limit the scope of the application. Various modifications and changes can be made thereto by those skilled in the art which freely adapt to the idea and principles of the application, without departing from the spirit and scope thereof. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the application should be included in the protection scope of the application.

Claims

1. A method of manufacturing an aluminum alloy stop valve, characterized by, Specifically comprising the following steps: (1) aluminum alloy selection smelting; (2) casting: the aluminum alloy melt is cast into an aluminum alloy rod; (3) aluminum alloy rod homogenization treatment: the aluminum alloy rod obtained by cooling in step (2) is placed in a homogenization furnace for homogenization treatment; (4) special-shaped extrusion forming: the aluminum alloy rod after homogenization treatment in (3) is cut into a short rod, the short rod is heated to 450-550 DEG C, and a 2000T and above positive extrusion machine is used for extrusion forming, and the extrusion die temperature is controlled at 400-500 DEG C; (5) heat treatment strengthening: after the extruded profile is water-cooled to room temperature in a certain time, after a certain time, it is heated to a temperature in a certain time and kept for several hours, then heated to a temperature in a certain time and kept for several hours, and finally air-cooled after taking out of the furnace, a long section valve seat aluminum alloy profile blank with a cross section is obtained, the height (h) of the long section valve seat aluminum alloy profile blank in the vertical direction is not less than the maximum height of the stop valve in the vertical direction, and the width (g) of the long section valve seat aluminum alloy profile blank is not less than the width of the stop valve, the height (h) is the height of the longitudinal section of the long section valve seat aluminum alloy profile blank, and the width (g) is the width of the longitudinal section of the long section valve seat aluminum alloy profile blank; (6) cutting and blanking: the long section valve seat aluminum alloy profile blank after heat treatment strengthening is cut into a plurality of aluminum alloy stop valve blanks according to the width value of the stop valve; when the aluminum alloy stop valve is an integrated aluminum alloy stop valve with a valve seat and a flange, the width (g) is the width (m) in the direction of the center axis of the stop valve nozzle mouth, and when the stop valve and the flange are a split structure, the width (g) is the width (n) perpendicular to the center axis of the nozzle mouth and the center axis of the valve core; (7) machining into an aluminum alloy stop valve; Wherein, the aluminum alloy stop valve is an integrated aluminum alloy stop valve with a valve seat and a flange, including a valve pipe (13), a connecting pipe, a reinforcing part (12) and a flange (20), the transverse part in the cross-shaped aluminum alloy stop valve blank obtained in step (6) is a flange forming part (51), and the vertical part in the cross-shaped aluminum alloy stop valve blank is a valve body forming part, the width of the transverse part is greater than the width of the vertical part; the valve body forming part includes a valve body first forming part (52) below the flange forming part (51) and a valve body second forming part (53) above the flange forming part (51), the valve body first forming part (52) is used for machining and forming the connecting pipe below the flange (20), and the valve body second forming part (53) is used for machining and forming the valve pipe (13), the connecting pipes on the left and right sides of the valve pipe (13) and the reinforcing part (12) above the flange (20); the shape of the valve body first forming part (52) is a cuboid. The second forming part (53) of the valve body comprises a vertical main body part (531) for forming the reinforcing part (12) and the valve pipe (13), two circular arc-shaped outer convex parts (532) and two rectangular outer convex parts (533) are symmetrically arranged on both sides of the vertical main body part (531) from bottom to top, the two circular arc-shaped outer convex parts (532) are arranged at intervals from the flange (20), the center of the circle where the upper arc of the two circular arc-shaped outer convex parts (532) is located is the center point of the valve body forming part in the height direction, and is located on the center axis of the left and right side connecting pipes of the valve pipe (13), and the diameter of the circular arc-shaped outer convex part (532) is not less than the diameter of the outer thread on the left and right side connecting pipes of the valve pipe (13); the two rectangular outer convex parts (533) are located at the upper part of the vertical main body part (531), the upper end surface of the rectangular outer convex part (533) is located in the same plane as the upper end surface of the vertical main body part (531), and the rectangular outer convex part (533) is used for thread forming machining of the cap of the valve pipe (13).

2. The method of claim 1, wherein The aluminum alloy stop valve is a split type aluminum alloy stop valve with split valve seat and flange, comprising a valve body (11), a first connecting pipe (131), a second connecting pipe (132), a third connecting pipe (133), a reinforcing part (12), a flange mounting part (14) and a flange, the aluminum alloy stop valve blank obtained in step (6) is a valve body forming part (40), the valve body forming part (40) comprises a reinforcing part forming part (41), a valve body forming part (42) and a first connecting pipe forming part (43) located on the upper and lower sides of the reinforcing part forming part (41), and a second connecting pipe forming part (44) and a third connecting pipe forming part (45) located on the left and right sides of the reinforcing part forming part (41).

3. The method of claim 2, wherein the aluminum alloy stop valve is manufactured by the steps of: A first part body and a flange mounting part (14) matching the structural size of the corresponding part of the aluminum alloy stop valve are sequentially arranged from top to bottom between the reinforcing part forming part (41) and the first connecting pipe forming part (43).

4. The method of claim 3, wherein The reinforcing part forming part (41) is provided with a third part body forming part (46) at the upper part of the side of the valve body forming part (42) close to the third connecting pipe (133), and the upper end surface of the third part body forming part (46) is higher than the upper end surface of the third connecting pipe forming part (45).

5. The method of claim 4, wherein the aluminum alloy stop valve is manufactured by the steps of: The reinforcing part forming part (41) is connected to the third connecting pipe forming part (45) through a downward inclined slope between the upper end surface of the side of the valve body forming part (42) close to the third connecting pipe (133) and the third connecting pipe forming part (45).

6. The method of claim 5, wherein the aluminum alloy stop valve is manufactured by the steps of: The upper end surface of the reinforcing part forming part (41) on the side of the valve body forming part (42) close to the second connecting pipe (132) is in the same plane as the second connecting pipe forming part (44); the length of the first connecting pipe forming part (43) in the cross-shaped transverse direction is greater than the length of the flange mounting part (14), and the upper part of the width direction side surface of the first connecting pipe forming part (43) is connected to the lower end of the flange mounting part (14) through an outwardly inclined inclined surface.

7. The method of claim 6, wherein the aluminum alloy stop valve is manufactured by the steps of: An extension portion forming part (47) is arranged between the reinforcing portion forming part (41) and the valve body forming part (42), the extension portion forming part (47) is coaxially arranged with the valve body forming part (42), the length of the extension portion forming part (47) in the cross type transverse portion direction is less than the width of the valve body forming part (42), the lower part of the valve body forming part (42) in the width direction is connected with the upper end of the extension portion forming part (47) through an inwardly inclined inclined surface.

8. An integrated aluminum alloy stop valve characterized by, The integrated aluminum alloy stop valve is manufactured according to the method of claim 1.

9. A combined aluminum alloy stop valve characterized by, The combined aluminum alloy stop valve is manufactured according to the method of claim 7.

10. The combined aluminum alloy stop valve according to claim 9, wherein The flange is provided with a flange mounting hole, the flange mounting part (14) is inserted into the flange mounting hole; transition circular arcs are arranged at four corners of the flange mounting hole, the angle of the circular arc is greater than 90°; the flange is a symmetric double-hole structure; the length of the flange mounting hole is set as J, the length of the flange mounting part (14) is set as j, J and j satisfy the relationship: 0.1≤J-j≤0.3mm; the width of the flange mounting hole (23) is set as A, the width of the flange mounting part (14) is set as a, A and a satisfy the relationship: 0.1≤A-a≤0.3mm. ​

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