A high-strength, earthquake-resistant valve casting and its machining method

Abstract

This invention discloses a high-strength, shock-resistant valve casting and its processing method, relating to the field of valve castings. The casting includes a main body, a flange, a contact buffer pad, an embedded ring, an upper covering buffer layer, a first honeycomb buffer layer, a second honeycomb buffer layer, and a lower covering buffer layer. This invention, by providing a contact buffer pad on the flange end face, has a multi-layered buffer structure. Combined with the process of embedding the buffer pad in a circular groove, it not only enhances shock resistance but also effectively reduces vibration damage to the valve connection. The honeycomb structure of the buffer pad provides excellent energy absorption and dispersion, while the outer covering layer improves wear resistance and corrosion resistance, extending the overall service life and ensuring stable sealing performance under high-pressure environments.

Description

Technical Field

[0001] This invention relates to the field of valve castings, and more particularly to a high-strength, shock-resistant valve casting and its processing method. Background Technology

[0002] Valve castings are valve components manufactured through a casting process, typically made of metal. They include key components such as the valve body, valve cover, and valve seat. Through precise mold design and material selection, they ensure the valve's sealing performance, durability, and shock resistance under high pressure, high temperature, or corrosive environments. The quality and precision of castings are crucial to the valve's performance and lifespan, and they are commonly used in industrial piping systems to control fluid flow.

[0003] In practical use, existing valve castings have the following problems: they are directly locked to the connecting flange at the connection position, lacking sufficient buffer support, and the processing of additional support and buffer components during machining requires manual operation, which is labor-intensive and affects work efficiency. Summary of the Invention

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

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a high-strength shock-resistant valve casting and its processing method, comprising a casting body, a flange provided on the outer side of the casting body, a contact buffer pad connected to the outer side of the flange, a circular groove provided on the outer side, an embedded ring embedded inside the circular groove, and the other end of the embedded ring connected to the contact buffer pad;

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

[0007] Preferably, the outer side of the contact cushioning pad has a wavy shape.

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

[0009] S1 Casting Body Manufacturing: Material Selection: High-strength alloy steel is used for casting to ensure sufficient shock resistance of the valve casting; Mold Design: A mold with a circular groove is designed at the valve connection position. The size and shape of the circular groove are precisely designed according to the embedding requirements of the buffer pad; Melting and Casting: The selected metal material is melted and molten. Using precision casting technology, the molten metal is poured into the mold to form the basic structure of the valve casting, including the circular groove part; Cooling and Demolding: After the casting cools, it is demolded and undergoes preliminary surface treatment to remove flash and burrs; Heat Treatment: The casting is heat treated to improve the strength and toughness of the material and ensure its shock resistance performance.

[0010] Manufacturing of S2 contact buffer pad: Material selection for upper and lower covering layers: silicone rubber is selected; the honeycomb buffer layer is made of polypropylene, and the honeycomb structure is manufactured by molding or extrusion; the two honeycomb buffer layers are combined with the upper and lower covering layers by hot pressing, and then the embedded ring is connected to the buffer pad by adhesive bonding. The buffer pad is then 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] S3 buffer pad embedding and fixing: Clean the surface of the circular groove, buffer pad and embedding ring to ensure that the contact surface of the two is clean and free of impurities, and use industrial adhesive for bonding.

[0012] S4 Post-processing: The embedded ring and buffer pad after connection are pressed and secured by a stabilizing cleaning device, and the excess adhesive on their edges is cleaned; then the entire casting is treated with rust prevention and sprayed with an anti-corrosion coating.

[0013] Preferably, the stabilizing cleaning device includes an adjustment mechanism, a contact cleaning mechanism located at the bottom of the adjustment mechanism, and a push cylinder located inside the contact cleaning mechanism. The contact cleaning mechanism is adjusted with the adjustment mechanism and achieves the pressing and cleaning of the contact cushion pad.

[0014] Preferably, the adjustment mechanism includes a fixed plate, supports at three ends of the bottom of the fixed plate, a linkage hinged to the supports, a support rod connecting the other end of the linkage, a drive motor located outside two sets of supports and whose output shaft is connected to the linkage, a fixed ring located below the fixed plate, a lifting cylinder located in the middle of the bottom of the fixed plate, a connector connecting the bottom push rod of the lifting cylinder, a connecting seat hinged to the outside of the connector, sleeves located at both ends inside the fixed ring, and a guide rod movably embedded inside the sleeve. The bottom of the guide rod and the connecting seat are both connected to a contact cleaning mechanism.

[0015] Preferably, the bottom of the support rod is also connected to another set of linkage components and supports, and the bottom of the supports 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 at both ends of the pressure plate, a brush plate connecting the sliders, and a pressing column 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 a rod connected to the slider.

[0017] Preferably, the pressure plate has protrusions at both ends, and a sliding groove is provided at the protrusion position, in which a slider is movably embedded.

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

[0019] The beneficial effects of this invention are:

[0020] This invention features a multi-layered buffer structure with a contact buffer pad on the flange end face. Combined with the process of embedding the buffer pad in a circular groove, it not only enhances the shock resistance but also effectively reduces the damage of vibration to the valve connection. The honeycomb structure of the buffer pad provides excellent energy absorption and dispersion, while the outer coating layer improves wear resistance and corrosion resistance, extending the overall service life and ensuring stable sealing performance under high pressure.

[0021] This invention achieves its purpose by employing a stabilizing cleaning device in the post-processing stage. The stabilizing cleaning device has a built-in adjustment mechanism, the bottom of which is connected to a contact cleaning mechanism. The contact cleaning mechanism can press and solidify the contact buffer pad under the action of the adjustment mechanism, and the angle is adjustable to achieve uniform pressing at multiple angles. Furthermore, the contact cleaning mechanism is equipped with an adjustable cleaning component, which can automatically and efficiently clean the flange end face and the edge of the contact buffer pad. The cleaning efficiency is high, manual operation is reduced, and work efficiency is effectively improved. Attached Figure Description

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

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

[0024] Figure 3 This is a schematic diagram of a partial cross-sectional view of the contact cushioning pad of the present invention;

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

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

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

[0028] The components include: casting body-a, flange-b, contact buffer pad-c, embedded ring-d, upper covering buffer layer-c1, first honeycomb buffer layer-c2, second honeycomb buffer layer-c3, lower covering buffer layer-c4, stabilizing cleaning device-1, adjusting mechanism-11, contact cleaning mechanism-12, pushing cylinder-13, fixed plate-111, support-112, linkage component-113, support rod-114, drive motor-115, fixed ring-116, lifting cylinder-117, connecting component-118, connecting seat-119, sleeve-1110, guide rod-1111, pressure plate-121, slider-122, brush plate-123, and pressing column-124. Detailed Implementation

[0029] To further explain the technical solution of the present invention, a detailed description is provided below through specific embodiments.

[0030] Please see Figures 1-3 This invention provides a high-strength, shock-resistant valve casting, comprising a casting body a, flanges b welded to the left, right, and top sides of the casting body a, a circular groove provided on the outer side of the flange b, an embedded ring d embedded inside the circular groove, the other end of the embedded ring d being connected to a contact buffer pad c, the contact buffer pad c including an upper covering buffer layer c1, a first honeycomb buffer layer c2 attached to the inner side of the upper covering buffer layer c1, a second honeycomb buffer layer c3 connected to the other side of the first honeycomb buffer layer c2, and a lower covering buffer layer c4 covering the other side of the second honeycomb buffer layer c3, the outer side of the contact buffer pad c having a wavy shape and not covering the locking hole inside the flange b.

[0031] A processing method for a high-strength, shock-resistant valve casting, comprising: S1 Casting body manufacturing: Material selection: High-strength alloy steel is used for casting to ensure sufficient shock resistance of the valve casting; Mold design: A mold with a circular groove is designed 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: The selected metal material is melted and molten, and the molten metal is poured into the mold using precision casting technology to form the basic structure of the valve casting, including the circular groove part; Cooling and demolding: After the casting cools, it is demolded and subjected to preliminary surface treatment to remove burrs and flash; Heat treatment: The casting is heat treated to improve the strength and toughness of the material and ensure its shock resistance performance; 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, manufactured through mold pressing or extrusion molding; the two honeycomb buffer layers 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 an adhesive process. The buffer pad is then 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 Buffer pad embedding and fixing: The circular groove, buffer pad, and embedded ring surfaces are cleaned to ensure that the contact surfaces are clean and free of impurities, and industrial adhesive is used for bonding; S4 Post-treatment: The connected embedded ring and buffer pad are pressed and fixed using a stabilizing cleaning device, and the excess adhesive on their edges is cleaned; then the entire casting is treated with rust prevention and sprayed with an anti-corrosion coating.

[0032] Please see Figures 4-6 The stabilizing cleaning device 1 includes an adjustment mechanism 11. The top of the adjustment mechanism 11 can be connected to an external rotating mechanism and a lifting mechanism for lifting and rotating. The bottom of the adjustment mechanism 11 is connected to a contact cleaning mechanism 12. A push cylinder 13 is installed inside the contact cleaning mechanism 12. The contact cleaning mechanism 12 presses and cleans the contact buffer pad c as driven by the adjustment mechanism 11.

[0033] The adjusting mechanism 11 includes a fixed plate 111. The top of the fixed plate 111 can be connected to an external rotating mechanism and a lifting mechanism. The bottom of the fixed plate 111 is provided with supports 112 at three ends. Each set of supports 113 has a linkage 113 hinged to its lower end. The other end of the linkage 113 is connected to the support rod 114. Two sets of supports are provided with drive motors 115 on their outer sides. The output shaft of the drive motors 115 is connected to the linkage 113. The bottom of the support rod 114 is also connected to another set of linkages 113 and supports. 112, the bottom of the support 112 at the lower end is fixed to the fixing ring 116. A lifting cylinder 117 is provided in the middle of the bottom end of the fixing plate 111. The bottom push rod of the lifting cylinder 117 is hinged to the connecting piece 118. A connecting seat 119 is hinged to the outside of the connecting piece 118. Sleeves 1110 are embedded in both ends of the fixing ring 116. A guide rod 1111 is movably embedded inside the sleeve 1110. The bottom of the guide rod 1111 and 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. The bottom of the pressure plate 121 is locked with a pressing post 124 by bolts. The pressing post 124 is used to fix the pressure plate 121. The left and right ends of the pressure plate 121 protrude. A sliding groove is opened at the protruding position. A slider 122 is movably embedded in the sliding groove. A brush plate 123 is connected to the inner side of the slider 122. The brush plate 123 is trapezoidal and has a brush at the bottom. A push cylinder 13 is installed at the top of the protruding position. The other end of the push cylinder 13 pushes out a rod connected to the slider 122. The slider 122 can slide in the sliding groove as the push cylinder 13 acts.

[0035] The specific implementation process is as follows:

[0036] When it is necessary to clean the edges and press the assembled contact buffer pad c, press the middle of the flange b corresponding to the pressing column 124, and then start the lifting cylinder 117. The bottom push rod 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 pad c. Then the pressing column 124 extends into the through hole. If it is necessary to fix the position of the embedded ring d, start the two sets of drive motors 115 to start working. The linkage 113 can swing through the support rod 114 to adjust the angle of pressing 124, so as to press the embedded ring d evenly and stably.

[0037] After the pressing is completed, cleaning work needs to be started. The external rotating device is started to rotate the fixed plate 111. During the rotation, the push cylinder 13 is started to push the slider 122, so that the brush plate 123 is adjusted to contact the side of the contact buffer pad c and the flange end face. The rotation is used to scrape and clean the residual glue and impurities on its surface.

[0038] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for processing high-strength, earthquake-resistant valve castings, characterized in that: The valve casting includes a casting body with a flange on its outer side. A contact buffer pad is connected to the outer side of the flange. A circular groove is formed on the outer side of the flange, and an embedded ring is embedded inside the groove. 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 disposed inside the upper covering buffer layer, a second honeycomb buffer layer connected to the inner side of the first honeycomb buffer layer, and a lower covering buffer layer covering the second honeycomb buffer layer. The outer side of the contact buffer pad is wavy. The specific steps for machining the valve casting are as follows: S1 Casting Body Manufacturing: Material Selection: High-strength alloy steel is used for casting to ensure sufficient shock resistance of the valve casting; Mold Design: A mold with a circular groove is designed at the valve connection position. The size and shape of the circular groove are precisely designed according to the embedding requirements of the buffer pad; Melting and Casting: The selected alloy steel is melted and molten. Using precision casting technology, the molten metal is poured into the mold to form the basic structure of the valve casting, including the circular groove part; Cooling and Demolding: After the casting cools, it is demolded and preliminary surface treatment is performed to remove flash and burrs; Heat treatment: Heat treatment is performed on the castings to improve the strength and toughness of the material and ensure its seismic performance; Manufacturing of S2 contact buffer pad: Material selection for upper and lower covering layers: silicone rubber is selected; the honeycomb buffer layer is made of polypropylene, and the honeycomb structure is manufactured by molding or extrusion; the two honeycomb buffer layers are combined with the upper and lower covering layers by hot pressing, and then the embedded ring is connected to the buffer pad by adhesive bonding. The buffer pad is then 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 buffer pad embedding and fixing: Clean the surface of the circular groove, buffer pad and embedding ring to ensure that the contact surface is clean and free of impurities, and use industrial adhesive for bonding. S4 post-processing: The embedded ring and buffer pad after connection are pressed and secured by a stabilizing cleaning device, and the excess adhesive on their edges is cleaned; then the entire casting is treated with rust prevention and sprayed with an anti-corrosion coating. The stabilizing cleaning device includes an adjustment mechanism, a contact cleaning mechanism located at the bottom of the adjustment mechanism, and a push cylinder located inside the contact cleaning mechanism. The contact cleaning mechanism is adjusted with the adjustment mechanism and achieves the pressing and cleaning of the contact buffer pad. The adjustment mechanism includes a fixed plate, supports at three ends of the bottom of the fixed plate, a linkage hinged to the supports, a support rod connecting the other end of the linkage, a drive motor located outside two sets of supports and whose output shaft is connected to the linkage, a fixed ring located below the fixed plate, a lifting cylinder located in the middle of the bottom of the fixed plate, a connector connecting the bottom push rod of the lifting cylinder, a connecting seat hinged to the outside of the connector, sleeves located at both ends inside the fixed ring, and a guide rod movably embedded inside the sleeve. The bottom of the guide rod and the connecting seat are both connected to a contact cleaning mechanism.

2. The processing method for a high-strength, earthquake-resistant valve casting according to claim 1, characterized in that: The bottom of the support rod is connected to another set of identical linkage components and supports, and the bottom of the support at the lower end is fixed to the fixing ring.

3. The processing method for a high-strength, earthquake-resistant valve casting according to claim 1, characterized in that: The contact cleaning mechanism includes a pressure plate connecting the guide rod and the connecting seat, sliders at both ends of the pressure plate, a brush plate connecting the sliders, and a pressing column at the bottom of the pressure plate. The pushing cylinder is installed on the top of the pressure plate, and the push rod of the pushing cylinder is connected to the slider.

4. The processing method for a high-strength, earthquake-resistant valve casting according to claim 3, characterized in that: The pressure plate protrudes at both ends, and a sliding groove is provided at the protruding position, in which a slider is movably embedded.

5. The processing method for a high-strength, earthquake-resistant valve casting according to claim 4, characterized in that: The brush plate is trapezoidal in shape and has a brush at the bottom.

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