High-strength shock-resistant valve casting and machining method thereof

Abstract

The invention discloses a high-strength shock-resistant valve casting and a processing method thereof, and relates to the related field of valve castings, and the high-strength shock-resistant valve casting comprises a casting main body, a flange, a contact buffer pad, an embedded ring, an upper coating buffer layer, a first honeycomb buffer layer, a second honeycomb buffer layer and a lower coating buffer layer. The contact buffer pad is arranged on the end face of the flange, a multi-layer buffer structure is arranged, and the process that the buffer pad is embedded into the circular groove is combined, so that the anti-seismic performance is enhanced, damage of vibration to a valve connecting part is effectively reduced, the honeycomb-shaped structure of the buffer pad provides excellent energy absorption and dispersion effects, and the service life of the valve is prolonged. And the external coating layer improves the wear resistance and corrosion resistance, prolongs the overall service life, and ensures the stable sealing performance in a high-pressure environment at the same time.

Description

Technical Field

[0001] The invention relates to the field related to valve castings, and in particular to a high-strength shock-resistant valve casting and a processing method thereof. Background Art

[0002] Valve castings refer to valve parts manufactured by casting process, usually made of metal materials. They include key components such as valve body, valve cover, valve seat, etc., and ensure the sealing, durability and shock resistance of valves under high pressure, high temperature or corrosive environment through precise mold design and material selection. The quality and precision of castings are crucial to the performance and life of valves, and are often used in industrial piping systems to control the flow of fluids.

[0003] The valve castings in the prior art have the following problems in actual use: they are directly locked with the connecting flange at the connection position, lack certain buffer support, and the processing of the additional support buffer parts during processing requires manual operation, which is labor-intensive and affects work efficiency. Summary of the invention

[0004] Therefore, in order to solve the above-mentioned shortcomings, the present invention provides a high-strength shock-resistant valve casting and a processing method thereof.

[0005] In order to achieve the above object, the present invention adopts the following technical scheme: a high-strength earthquake-resistant valve casting and a processing method thereof, comprising a casting body, a flange is arranged on the outside of the casting body, a contact buffer pad is connected to the outside of the flange, a circular groove is arranged on the outside, an embedded ring is embedded in the circular groove, and the other end of the embedded ring is connected to the contact buffer pad;

[0006] The contact buffer pad includes an upper covering buffer layer, a first honeycomb buffer layer arranged inside the upper covering buffer layer, a second honeycomb buffer layer connected to the inside of the first honeycomb buffer layer, and a lower covering buffer layer covering the second honeycomb buffer layer.

[0007] Preferably, the outer side of the contact buffer pad is wavy.

[0008] Preferably, the specific steps are as follows:

[0009] S1 Casting body manufacturing: Material selection: Use high-strength alloy steel for casting to ensure that the valve casting has sufficient seismic resistance; Mold design: Design a mold with a circular groove at the valve connection position, and the size and shape of the circular groove are precisely designed according to the embedding requirements of the buffer pad; Melting and casting: Melt the selected metal material, use precision casting technology, pour the molten metal into the mold to form the basic structure of the valve casting, including the circular groove part; Cooling and demoulding: After the casting is cooled, demould it, and perform preliminary surface treatment to remove flash and burrs; Heat treatment: Heat treatment is performed on the casting to improve the strength and toughness of the material and ensure its seismic resistance;

[0010] Manufacturing of S2 contact buffer pad: Material selection of upper and lower covering layers: Silicon rubber is selected; the honeycomb buffer layer is made of polypropylene, and the honeycomb structure is manufactured through mold pressing or extrusion molding process; the two layers of honeycomb buffer layer are combined with the upper and lower covering layers through a hot pressing process, and then the embedded ring is connected to the buffer pad through a gluing process, and then the buffer pad is cut according to the size of the circular groove to ensure that it can be embedded in the circular groove of the valve casting;

[0011] Embedding and fixing of S3 buffer pad: Clean the surface of the circular groove, buffer pad and embedding ring to ensure that the contact surface between the two is clean and free of impurities, and use industrial adhesive for bonding;

[0012] S4 post-processing: The connected embedded ring and buffer pad are pressed and fixed by a stabilizing and cleaning device, and the residual glue on their edges is cleaned; the overall casting is then treated with rust prevention and sprayed with an anti-corrosion coating.

[0013] Preferably, the stable cleaning device includes an adjusting mechanism, a contact cleaning mechanism disposed at the bottom of the adjusting mechanism, and a pushing cylinder disposed inside the contact cleaning mechanism. The contact cleaning mechanism is adjusted along with the adjusting mechanism, and realizes the pressing and cleaning of the contact buffer pad.

[0014] Preferably, the adjustment mechanism includes a fixed plate, supports arranged at three ends of the bottom of the fixed plate, a linkage part hinged to the supports, a support rod connected to the other end of the linkage part, a driving motor arranged at the outside of two groups of supports and the output shaft of which is connected to the linkage part, a fixed ring arranged below the fixed plate, a lifting cylinder arranged in the middle of the bottom end of the fixed plate, a connecting part connected to the pushing rod at the bottom of the lifting cylinder, a connecting seat hinged to the outside of the connecting part, sleeves arranged at both ends of the fixed ring and a guide rod movably embedded in the sleeve, and the guide rod and the bottom of the connecting seat are both connected to the contact cleaning mechanism.

[0015] Preferably, the bottom of the support rod is also connected to another set of linkage parts and a support, and the bottom of the support placed at the lower end is fixed to the fixing ring.

[0016] Preferably, the contact cleaning mechanism includes a pressure plate connecting the guide rod and the connecting seat, sliders arranged at both ends of the pressure plate, a brush plate connected to the slider, and a pressing column arranged at the bottom of the pressure plate. The pushing cylinder is installed on the top of the pressure plate, and the other end of the pushing cylinder pushes out the rod connected to the slider.

[0017] Preferably, the left and right ends of the pressure plate are protruding, and a slide groove is provided at the protruding position, and a sliding block is movably embedded in the slide groove.

[0018] Preferably, the brush plate is trapezoidal in shape, and a brush is provided at the bottom.

[0019] Beneficial effects of the present invention:

[0020] The present invention has a multi-layer buffer structure by arranging a contact buffer pad on the flange end face, and combining the process of embedding the buffer pad in a circular groove, which not only enhances the seismic resistance, but also effectively reduces the damage of vibration to the valve connection part. The honeycomb structure of the buffer pad provides excellent energy absorption and dispersion effects, while the external coating layer improves the wear resistance and corrosion resistance, prolongs the overall service life, and ensures stable sealing performance under high pressure environment.

[0021] The present invention is achieved by adopting a stable cleaning device in the post-processing process. The stable cleaning device is equipped with an adjustment mechanism. The bottom of the adjustment mechanism is connected to the contact cleaning mechanism. The contact cleaning mechanism can press the contact buffer pad under the action of the adjustment mechanism, and the angle is adjustable to achieve uniform pressing at multiple angles. An adjustable cleaning component is arranged in the contact cleaning mechanism, which can automatically and efficiently clean the flange end face and the edge position of the contact buffer pad. The cleaning efficiency is high, manual operation is reduced, and work efficiency is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the present invention;

[0023] Figure 2 is a schematic diagram of the structure of the contact buffer pad of the present invention;

[0024] Figure 3 It is a schematic diagram of a partially cutaway structure of a contact buffer pad of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the stable cleaning device of the present invention;

[0026] Figure 5 It is a schematic diagram of the structure of the regulating mechanism of the present invention;

[0027] Figure 6 It is a schematic diagram of the structure of the contact cleaning mechanism of the present invention.

[0028] Among them: casting body-a, flange-b, contact buffer pad-c, embedded ring-d, upper coating buffer layer-c1, first honeycomb buffer layer-c2, second honeycomb buffer layer-c3, lower coating buffer layer-c4, stabilizing cleaning device-1, adjusting mechanism-11, contact cleaning mechanism-12, pushing cylinder-13, fixing plate-111, support-112, linkage part-113, support rod-114, driving motor-115, fixing ring-116, lifting cylinder-117, connecting part-118, connecting seat-119, sleeve-1110, guide rod-1111, pressure plate-121, slider-122, brush plate-123, pressing column-124. DETAILED DESCRIPTION

[0029] In order to further explain the technical solution of the present invention, it is described in detail below through specific embodiments.

[0030] See also Figure 1-Figure 3 The present invention provides a high-strength earthquake-resistant valve casting, including a casting body a, flanges b are welded on the left and right sides and the top of the casting body a, a circular groove is arranged on the outer side of the flange b, an embedded ring d is embedded in the circular groove, the other end of the embedded ring d is connected to a contact buffer pad c, the contact buffer pad c includes an upper covering buffer layer c1, a first honeycomb buffer layer c2 is attached to the inner side of the upper covering buffer layer c1, the other side of the first honeycomb buffer layer c2 is connected to the second honeycomb buffer layer c3, the other side of the second honeycomb buffer layer c3 is covered with a lower covering buffer layer c4, the outer side of the contact buffer pad c is wavy and does not cover the lock hole in the flange b.

[0031] A processing method for a high-strength, earthquake-resistant valve casting, S1 casting body manufacturing: material selection: use high-strength alloy steel for casting to ensure that the valve casting has sufficient earthquake resistance; mold design: design a mold with a circular groove at the valve connection position, and the size and shape of the circular groove are precisely designed according to the embedding requirements of the buffer pad; smelting and casting: melt the selected metal material, use precision casting technology, pour the molten metal into the mold, and form the basic structure of the valve casting, including the circular groove part; cooling and demoulding: demould the casting after cooling, and perform preliminary surface treatment to remove flash and burrs; heat treatment: heat treat the casting to improve the strength and toughness of the material and ensure its earthquake resistance; S2 manufacturing of contact buffer pad c: upper and lower packages Material selection for the coating: silicone rubber is selected; the honeycomb buffer layer is made of polypropylene, and the honeycomb structure is manufactured through a mold pressing or extrusion molding process; the two layers of honeycomb buffer layers are combined with the upper and lower coating layers through a hot pressing process, and then the embedded ring is connected to the buffer pad through a gluing process, and then the buffer pad is cut according to the size of the circular groove to ensure that it can be embedded in the circular groove of the valve casting; S3 embedding and fixing of the buffer pad: the circular groove, buffer pad and embedded ring surface are cleaned to ensure that the contact surface between the two is clean and free of impurities, and industrial adhesives are used for bonding; S4 post-processing: the connected embedded ring and buffer pad are pressed and fixed by a stable cleaning device, and the residual glue on their edges is cleaned; then the overall casting is treated with rust prevention and sprayed with an anti-corrosion coating.

[0032] See also Figure 4-Figure 6 The stable cleaning device 1 includes an adjusting mechanism 11. The top of the adjusting mechanism 11 can be connected to an external rotating mechanism and a lifting mechanism for lifting and rotating. The bottom of the adjusting mechanism 11 is connected to a contact cleaning mechanism 12. A push cylinder 13 is installed in the contact cleaning mechanism 12. The contact cleaning mechanism 12 is driven by the adjusting mechanism 11 to press and clean the contact buffer pad c.

[0033] The adjustment mechanism 11 includes a fixed plate 111, the top of which can be connected to an external rotating mechanism and a lifting mechanism, and the three ends of the bottom of the fixed plate 111 are provided with supports 112, and the lower end of each group of supports 113 is hinged with a linkage 113, and the other end of the linkage 113 is connected to a support rod 114, wherein a driving motor 115 is provided on the outside of two groups of supports, and the output shaft of the driving motor 115 is connected to the linkage 113, and the bottom of the support rod 114 is also connected to another group of linkages 113 and the support 112, the bottom of the support 112 placed at the lower end is fixed to the fixed ring 116, and a lifting cylinder 117 is set in the middle of the bottom end of the fixed plate 111, and the pushing rod at the bottom of the lifting cylinder 117 is hinged with the connecting piece 118, and the outer side of the connecting piece 118 is hinged with a connecting seat 119, and sleeves 1110 are embedded at both ends of the fixed ring 116, and a guide rod 1111 is movably embedded inside the sleeve 1110, and the guide rod 1111 and the bottom of the connecting seat 119 are both connected to the contact cleaning mechanism 12.

[0034] The contact cleaning mechanism 12 includes a pressure plate 121 connecting the guide rod 1111 and the connecting seat 119, and a pressing column 124 is locked at the bottom of the pressure plate 121 by bolts. The pressing column 124 is used to fix the pressure plate 121. The left and right ends of the pressure plate 121 are protruding, and a sliding groove is opened at the protruding position. A slider 122 is movably embedded in the sliding groove. The inner side of the slider 122 is connected to a brush plate 123, the brush plate 123 is trapezoidal, and a brush is arranged at the bottom. The pushing cylinder 13 is installed on the top of the protruding position, and the other end of the pushing cylinder 13 is connected to the slider 122 by a push rod. The slider 122 can slide in the sliding groove with the action of the pushing cylinder 13.

[0035] The specific implementation process is as follows:

[0036] When it is necessary to clean the edge and press the assembled contact buffer c, the middle part of the flange b is pressed against the column 124, and then the lifting cylinder 117 is started to work, and the push rod at the bottom acts on the connecting piece 118 and the connecting seat 119, so that the bottom pressure plate 121 contacts the top of the contact buffer c, and then the pressing column 124 extends into the through hole. If it is necessary to fix the position of the embedded ring d, the two sets of driving motors 115 are started to work, and the linkage 113 can be swung through the support rod 114 to adjust the angle of pressing 124, so as to press the embedded ring d evenly and stably;

[0037] When the compaction is completed, it is necessary to start cleaning work. Start the external rotating equipment to rotate the fixed disk 111. During the rotation, start the pushing cylinder 13 to push the slider 122, so that the brush plate 123 is adjusted in position to contact the side edge of the contact buffer pad c and the flange end face, and cooperate with the rotation to scrape and clean the residual glue and impurities attached to the surface.

[0038] The above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-strength, earthquake-resistant valve casting, characterized in that: The casting body comprises a flange on the outside of the casting body, a contact buffer pad is connected to the outside of the flange, a circular groove is provided on the outside, an embedded ring is embedded in the circular groove, and the other end of the embedded ring is connected to the contact buffer pad; The contact buffer pad includes an upper covering buffer layer, a first honeycomb buffer layer arranged inside the upper covering buffer layer, a second honeycomb buffer layer connected to the inside of the first honeycomb buffer layer, and a lower covering buffer layer covering the second honeycomb buffer layer.

2. A high-strength, earthquake-resistant valve casting, characterized in that: The outer side of the contact buffer pad is in a wave shape.

3. A method for processing a high-strength, earthquake-resistant valve casting, used to produce the casting as claimed in claim 1, characterized in that: The specific steps are as follows: S1 Casting body manufacturing: Material selection: Use high-strength alloy steel for casting to ensure that the valve casting has sufficient earthquake resistance; Mold design: Design a mold with a circular groove at the valve connection position, and the size and shape of the circular groove are precisely designed according to the embedding requirements of the buffer pad; Melting and casting: Melt the selected metal material, use the precision casting process, pour the molten metal into the mold, and form the basic structure of the valve casting, including the circular groove part; Cooling and demoulding: After the casting is cooled, demould it, and perform preliminary surface treatment to remove flash and burrs; Heat treatment: Heat treatment of castings to improve the strength and toughness of the material and ensure its earthquake resistance; Manufacturing of S2 contact buffer pad: Material selection of upper and lower covering layers: Silicon rubber is selected; the honeycomb buffer layer is made of polypropylene, and the honeycomb structure is manufactured through mold pressing or extrusion molding process; the two layers of honeycomb buffer layer are combined with the upper and lower covering layers through a hot pressing process, and then the embedded ring is connected to the buffer pad through a gluing process, and then the buffer pad is cut according to the size of the circular groove to ensure that it can be embedded in the circular groove of the valve casting; Embedding and fixing of S3 buffer pad: Clean the surface of the circular groove, buffer pad and embedding ring to ensure that the contact surface between the two is clean and free of impurities, and use industrial adhesive for bonding; S4 post-processing: The connected embedded ring and buffer pad are pressed and fixed by a stabilizing and cleaning device, and the residual glue on their edges is cleaned; the overall casting is then treated with rust prevention and sprayed with an anti-corrosion coating.

4. A method for processing a high-strength, shock-resistant valve casting according to claim 3, characterized in that: The stable cleaning device comprises an adjusting mechanism, a contact cleaning mechanism arranged at the bottom of the adjusting mechanism and a pushing cylinder arranged inside the contact cleaning mechanism. The contact cleaning mechanism is adjusted along with the adjusting mechanism and realizes the pressing and cleaning of the contact buffer pad.

5. A method for processing a high-strength, shock-resistant valve casting according to claim 4, characterized in that: The adjustment mechanism includes a fixed plate, supports arranged at three ends of the bottom of the fixed plate, a linkage part hinged to the supports, a support rod connected to the other end of the linkage part, a driving motor arranged at the outside of two groups of supports and the output shaft of which is connected to the linkage part, a fixed ring arranged below the fixed plate, a lifting cylinder arranged in the middle of the bottom end of the fixed plate, a connecting part connected to the pushing rod at the bottom of the lifting cylinder, a connecting seat hinged to the outside of the connecting part, sleeves arranged at both ends of the fixed ring and a guide rod movably embedded in the sleeve, wherein the guide rod and the bottom of the connecting seat are both connected to the contact cleaning mechanism.

6. A method for processing a high-strength, shock-resistant valve casting according to claim 5, characterized in that: The bottom of the support rod is also connected with another set of linkage parts and a support, and the bottom of the support placed at the lower end is fixed with a fixing ring.

7. A method for processing a high-strength, shock-resistant valve casting according to claim 5, characterized in that: The contact cleaning mechanism includes a pressure plate connecting the guide rod and the connecting seat, sliders arranged at both ends of the pressure plate, a brush plate connected to the slider, and a pressing column arranged at the bottom of the pressure plate. The pushing cylinder is installed on the top of the pressure plate, and the other end of the pushing cylinder pushes out the rod connected to the slider.

8. A method for processing a high-strength, shock-resistant valve casting according to claim 7, characterized in that: The left and right ends of the pressure plate are protruded, and sliding grooves are provided at the protruding positions, and sliding blocks are movably embedded in the sliding grooves.

9. A method for processing a high-strength, shock-resistant valve casting according to claim 8, characterized in that: The brush plate is in a trapezoidal shape, and a brush is arranged at the bottom.

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