Anti-cracking valve casting and machining method thereof

Abstract

The invention discloses an anti-cracking valve casting and a machining method thereof. The anti-cracking valve casting is manufactured through a mold; smelting the materials; pouring and cooling the material; grinding and polishing; spraying a coating; according to the method, production and preparation of the valve casting are achieved through the steps such as preparation of the valve casting and packaging of the valve casting, in this way, rapid pouring and preparation of the whole valve casting can be achieved, and in the coating spraying step, through mixed spraying of PTFE paint and epoxy resin, the valve casting has the high anti-cracking characteristic, the overall service life is prolonged, and the service life of the valve casting is prolonged. Pouring equipment is arranged in the material pouring and cooling step, that is, flexible lifting pouring adjustment can be achieved through transmission of a screw rod and a movable base, and cooperation of pouring conversion and efficient cooling is achieved through cooperation with a multifunctional cooling device; and large-range spraying cooling and bubble auxiliary vibration elimination are achieved for the poured mold, and it is guaranteed that the valve casting is efficiently cooled and formed, and the forming quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of valve castings, in particular to a valve casting with anti-cracking properties and a processing method thereof. Background Art

[0002] Valve castings are generally made of sand or metal materials. It is difficult to achieve thermal insulation effect during use and they are easily affected by weather, especially freezing weather with extremely low temperatures. The valve pipeline is prone to freezing and expansion, causing the valve body to burst and crack, making the valve casting scrapped.

[0003] For this reason, the valve castings currently produced need to be polished and ground after the casting preparation activities are completed, and anti-cracking coatings need to be sprayed to achieve anti-cracking protection of the valve castings and increase the service life of the valve castings. However, the anti-cracking coatings currently used have low functionality and are more susceptible to external environmental influences during short-term use, resulting in cracking problems, which in turn affects the valve casting body.

[0004] Secondly, casting is an indispensable link in the casting process of valve castings. Through the casting method, the valve castings can be quickly solidified and formed at one time, which speeds up the production efficiency of the valve castings. However, after the casting of the valve casting material is completed, cooling activities are required. The methods currently used are generally placement cooling or wind cooling, but placement cooling or wind cooling are generally fixed in position, and the cooling effect on the valve castings is less than sufficient. At the same time, the position of the mold that receives the casting material is relatively fixed, resulting in uneven wind heat dissipation outside the mold during wind cooling, which makes the overall cooling efficiency of the valve castings less uniform, affecting the subsequent valve casting preparation steps. Summary of the Invention

[0005] The object of the present invention is to provide a valve casting with anti-cracking properties and a processing method thereof, so as to solve the problems raised in the above background technology.

[0006] In order to achieve the above objectives, the present invention adopts the following technical solutions: a valve casting with anti-cracking and a processing method thereof, comprising a valve casting body, the valve casting body comprising a casting body and an anti-cracking coating, the anti-cracking coating being sprayed on the outside of the casting body.

[0007] Preferably, the anti-cracking coating is composited from one or more of PTFE coating, polyethersulfone resin, silicone resin, epoxy resin, acrylic resin, polyphenylene sulfide resin, and polyamide-imide resin.

[0008] Preferably, the method for processing a valve casting having crack resistance comprises the following steps:

[0009] S1: Mould making, making corresponding casting mould according to valve casting production requirements;

[0010] S2: Material smelting, melting the metal material into a molten state through a smelting furnace;

[0011] S3: Material pouring and cooling: The molten material is poured into the mold through the pouring equipment, and then cooled to form the poured material;

[0012] S4: Grinding and polishing: the valve casting that has been cast and cooled is passed through the grinding and polishing equipment to grind and polish the external burrs;

[0013] S5: Coating spraying: After grinding and polishing, the anti-cracking spraying is carried out on the outside of the valve casting through a spraying machine;

[0014] S6: Valve casting packaging, combine the sprayed valve casting with other valve parts and then pack them.

[0015] Preferably, the casting equipment in step S3 includes a bracket, a controller installed on the upper end of the bracket, a shell fastened to one side of the upper end of the bracket, a support shell arranged inside the shell, a motor installed on the upper end of the support shell, a screw connected to the lower end of the motor, a movable seat threadedly connected to the outside of the screw, a casting cylinder installed on the upper end of the movable seat, a casting head provided at the lower end of the casting cylinder, a forming mold provided at the lower end of the casting head, and a multifunctional cooling device connected to the front side of the bracket.

[0016] Preferably, the multifunctional cooling device includes a protective shell docked to the front side of the bracket, a servo motor provided on one side of the interior of the protective shell, a gear installed on the upper end of the servo motor, a gear ring engaged with the outside of the gear, a rotating shell provided at the upper end of the protective shell and connected to the outside of the gear ring, a receiving net installed inside the rotating shell, a receiving seat installed inside the receiving net, a spray cooling assembly provided inside the protective shell, and a vibration steering assembly provided inside the protective shell and connected to the outside of the spray cooling assembly.

[0017] Preferably, the spray cooling assembly includes a lifting and rotating mechanism arranged inside the protective shell and connected to the output end of the servo motor, a water tank connected to the right side of the lifting and rotating mechanism and arranged at the lower end of the protective shell, a water pump installed inside the water tank, a water pipe connected to the upper end of the water pump, a multi-way pipe connected to the upper end of the water pipe, a nozzle connected to the outside of the multi-way pipe, and a recovery structure installed on the outside of the upper end of the water tank.

[0018] Preferably, the lifting and rotating mechanism includes a driving wheel docked to the outside of the output end of the servo motor, a transmission belt connected to the outside of the driving wheel, a driven wheel docked to the right side of the transmission belt, a first bevel gear provided at the upper end of the driven wheel, a second bevel gear engaged with the upper end of the first bevel gear, a docking rod inserted in the middle of the second bevel gear, a connecting shaft docked to the right side of the docking rod, a docking piece connected to the right side of the connecting shaft, a top rod connected to the outside of the water pipe and connected to the right side of the docking piece, and a protective box provided at the upper end of the top rod.

[0019] Preferably, the recovery structure includes a water receiving cover installed on the outside of the upper end of the water tank, recovery holes opened on both sides of the outer end of the water tank, a water guide plate built into the water tank, and a recovery pipe connected to the lower end of one side of the water guide plate.

[0020] Preferably, the vibration steering assembly includes a connecting ring fastened to the outside of the protective box, a filter screen sleeved on the outside of the protective box, vertical rods inserted into the four sides of the filter screen, compression springs arranged on the outside of the vertical rods, fixed blocks installed at the upper and lower ends of the vertical rods, and an impact rotation structure arranged at the upper end of the filter screen and against the bottom of the receiving seat.

[0021] Preferably, the impact rotation structure includes a protrusion provided on the upper end of the filter screen, an impact ring embedded in the inside of the protrusion, a connecting rod inserted into the inside of the side of the impact ring, a spring docked to the outside of the connecting rod, an inner tube provided in the middle of the protrusion, a convex shaft fastened to one side of the inner tube, and a rotating drum installed in the inner tube and connected to the bottom of the receiving seat, wherein the convex shaft is connected to the inside of the rotating drum.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The present invention realizes the production and preparation of valve castings through the steps of mold making; material melting; material pouring and cooling; grinding and polishing; coating spraying; valve casting packaging, etc., thereby enabling the valve casting to be quickly poured and prepared as a whole. In the coating spraying step, the valve casting is sprayed with a mixture of PTFE coating and epoxy resin to achieve high crack resistance and improve the overall service life. In addition, pouring equipment is provided in the material pouring and cooling steps to achieve efficient pouring, molding and reinforcement. In addition, a multifunctional cooling device is provided inside the pouring equipment to achieve large-scale spray cooling and bubble-assisted vibration elimination of the poured mold, thereby ensuring efficient cooling and molding of the valve casting and improving the molding quality.

[0024] The present invention provides a casting device in the material casting and cooling steps, that is, the transmission of the motor and the screw can realize the transmission of the movable seat connected to the outside of the screw. In this way, the casting cylinder and the casting head installed on the front side of the movable seat can realize the flexible adjustment of the upper and lower casting positions, thereby cooperating with the multifunctional cooling device connected to the front end of the bracket to realize the flexible conversion casting and efficient cooling of the forming mold, and then realize the efficient casting and molding of the valve body casting.

[0025] The present invention also provides a multifunctional cooling device inside the casting equipment, that is, in conjunction with the transmission of the gear and the gear ring, the rotating shell can realize the rotation of the receiving net and the receiving seat provided inside, thereby flexibly adjusting the casting position of the forming mold and accelerating the casting and molding efficiency of the valve casting. In conjunction with the spray cooling component installed inside the protective shell, the forming mold that has completed casting can be sprayed and cooled in an up and down reciprocating and reciprocating swinging manner, thereby accelerating the cooling and molding efficiency of the material inside the forming mold. At the same time, during the transmission process of the spray cooling component, the vibration steering component can be transmitted accordingly, thereby causing the forming mold placed inside the receiving seat to be subjected to impact vibration, thereby realizing the vibration bubble elimination activity of the material, and enabling the receiving seat to realize the rotation of the forming mold, so that the forming mold as a whole can be evenly sprayed and cooled, thereby avoiding the occurrence of inconsistent spray cooling problems.

[0026] The arrangement of the gear, gear ring, rotating shell, receiving net and receiving seat, that is, the gear can engage with the gear ring for transmission, thereby driving the rotating shell, so that the rotating shell can realize the rotation of the receiving net and the receiving seat. In this way, the casting positions of multiple forming molds can be flexibly adjusted to improve the overall casting and molding quality.

[0027] The setting of the spray cooling component, that is, when the servo motor is running, can synchronously realize the movement of the driving wheel, transmission belt and driven wheel, so that the transmission of the first bevel gear and the second bevel gear can be realized. In this way, the docking rod inserted into the second bevel gear can realize the rotation of the connecting shaft on the right side, and the rotating connecting shaft can be transmitted to the docking part installed on the outside of the push rod, so that the push rod can realize the up and down reciprocating movement and reciprocating swing of the top connected protective box at the same time. In this way, the water pump installed inside the water tank cooperates with the water pipe, multi-way pipe and nozzle to carry out spray cooling, which can realize large-scale spray cooling of the forming molds placed in various places, thereby improving the cooling efficiency of the casting material inside the forming mold.

[0028] With the setting of the recovery structure, the sprayed cooling water can drip along the outside of the forming mold to the inside of the water receiving cover after completing cooling. When transmitted along the water receiving cover, the cooling water can cooperate with the recovery holes opened on both sides of the upper end of the water tank and flow into the water guide plate provided at the upper end of the water tank. When transmitted with the water guide plate, the cooling water can cooperate with the recovery pipe connected to one side of the water guide plate and flow into the lower end of the water tank. In this way, the cooling water can be recycled and reused to avoid waste of cooling water.

[0029] The setting of the vibration steering assembly, that is, when the protective box moves up and down reciprocatingly with the transmission, can drive the connecting ring installed on the outside to move synchronously, so that the connecting ring can squeeze the filter, so that the filter cooperates with the vertical rods and compression springs provided on the four sides to perform elastic upward reset impact activities. Therefore, the impact rotation structure installed on the four sides of the upper end of the filter will cooperate with the impact ring, connecting rod and spring provided inside to impact the receiving seat, so that the receiving seat performs a certain vibration transmission to the placed forming mold. In this way, the material cast inside the forming mold can be vibrated to achieve the elimination of casting bubbles, thereby ensuring the casting quality of the valve casting. This process can be carried out simultaneously with the up and down reciprocating and reciprocating swing spraying processes, which greatly improves the casting quality of the valve casting.

[0030] The setting of the impact rotation structure, that is, when the filter is squeezed and moved downward, the built-in tube arranged inside the convex block can be moved downward synchronously, thereby making the convex shaft arranged on one side of the built-in tube transmit the rotation shaft connected to the lower end of the receiving seat, that is, transmit the circulation groove opened on the outside of the rotating shaft, so that when the filter is squeezed and moved downward and elastically moved upward, the convex shaft and the rotating shaft can be coordinated to realize the rotation drive of the receiving seat, thereby making the forming mold placed inside the receiving seat rotate, thereby ensuring the overall spray cooling effect of the forming mold, and avoiding the problem of inconsistent spray cooling of the forming mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the present invention;

[0032] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0033] Figure 3 A flow chart for preparing the valve casting of the present invention;

[0034] Figure 4 It is a schematic structural diagram of the pouring equipment of the present invention;

[0035] Figure 5 This is a schematic structural diagram of the multifunctional cooling device of the present invention;

[0036] Figure 6 This is a front view schematic diagram of the internal structure of the multifunctional cooling device of the present invention;

[0037] Figure 7 This is a schematic diagram of the internal structure of the spray cooling assembly of the present invention;

[0038] Figure 8 This is a front view structural diagram of the lifting and rotating mechanism of the present invention;

[0039] Figure 9 This is a schematic diagram of the front view of the vibration steering assembly of the present invention;

[0040] Figure 10 This is a schematic diagram of the internal structure of the impact rotation structure of the present invention;

[0041] Figure 11 It is a schematic diagram of the three-dimensional structure of the vibration steering assembly of the present invention;

[0042] Figure 12 It is a schematic diagram of the connection between the vibration steering assembly and the receiving seat of the present invention.

[0043] Figure: Valve casting body 1, casting body 11, anti-cracking coating 12, bracket 2, controller 3, housing 4, support shell 5, motor 6, screw 7, movable seat 8, casting barrel 9, casting head 10, forming mold 11, multifunctional cooling device 12, protective shell 121, servo motor 122, gear 123, gear ring 124, rotating shell 125, receiving net 126, receiving seat 127, spray cooling assembly 128, lifting and rotating mechanism 1281, driving wheel 12811, transmission belt 12812, driven wheel 12813, first bevel gear 12814, second bevel gear 12815, docking rod 12816, connecting shaft 12817, Connector 12818, push rod 12819, protective box 128110, water tank 1282, water pump 1283, water guide pipe 1284, multi-way pipe 1285, nozzle 1286, recovery structure 1287, water collection cover 12871, recovery hole 12872, water guide plate 12873, recovery pipe 12874, vibration steering assembly 129, connecting ring 1291, filter screen 1292, vertical rod 1293, compression spring 1294, fixing block 1295, impact rotation structure 1296, protrusion 12961, impact ring 12962, connecting rod 12963, spring 12964, internal tube 12965, protruding shaft 12966, rotating drum 12967. DETAILED DESCRIPTION

[0044] In order to further explain the technical solution of the present invention, specific embodiments are described in detail below.

[0045] See also Figure 1-2 The present invention provides a valve casting with anti-cracking properties and a processing method thereof, including a valve casting body 1, the valve casting body 1 including a casting body 11 and an anti-cracking coating 12, and the anti-cracking coating 12 is sprayed on the outside of the casting body 11.

[0046] The anti-cracking coating 12 is composed of one or more of PTFE coating, polyethersulfone resin, silicone resin, epoxy resin, acrylic resin, polyphenylene sulfide resin, and polyamide-imide resin. In this application, the anti-cracking coating is made by mixing PTFE coating and epoxy resin. In this way, a layer of anti-cracking coating can be formed on the outside of the valve casting body 1. In this way, the overall service life of the valve casting body 1 can be enhanced, and the problem of cracking and damage of the valve casting body 1 caused by the influence of the external environment can be reduced.

[0047] Among them, the characteristics of PTFE coating include its excellent chemical stability and wear resistance, which makes it an ideal choice for preventing valve body cracking. The non-adhesion and low friction coefficient of PTFE coating help reduce the retention of media inside the valve, thereby reducing corrosion and wear and extending the service life of the valve body.

[0048] Among them, epoxy resin is well-known for its excellent adhesion and corrosion resistance. It can firmly adhere to the surface of the valve body to form a protective layer to prevent the external environment and media from corroding the valve body. The strength and durability of epoxy resin further enhance the structural integrity of the valve body.

[0049] like Figure 3 As shown, a method for processing a valve casting with crack resistance includes the following steps:

[0050] S1: Mould making, making corresponding casting mould according to the shape and size of valve casting;

[0051] S2: Material smelting: according to the production ratio, the material is added into the smelting furnace to smelt the metal material and convert it into a molten state;

[0052] S3: Material pouring and cooling. The smelted material can be poured into the mold through the pouring equipment and then cooled to form the material, thereby achieving the casting and molding of the valve casting.

[0053] S4: Grinding and polishing: After casting and cooling the valve casting, it is necessary to use grinding and polishing equipment to grind and polish the external burrs to avoid the problem of uneven thickness of subsequent coating spraying due to the large number of burrs and potholes on the valve casting.

[0054] S5: Coating spraying: After grinding and polishing, the anti-cracking coating can be sprayed onto the outside of the valve casting through a sprayer to form an anti-cracking coating on the outside of the valve casting, thereby increasing the service life of the valve casting;

[0055] S6: Valve casting packaging, combine the sprayed valve casting with other valve parts and then pack them.

[0056] Specifically, through the above preparation steps, the crack-resistant valve casting can be quickly prepared. At the same time, with the sprayed anti-cracking coating 12, the structural strength of the valve casting can be enhanced to avoid cracking and damage caused by the external environment.

[0057] See also Figure 4 The pouring equipment in step S3 of this embodiment includes a bracket 2 for supporting use, a controller 3 installed on the rear side of the upper end of the bracket 2, a shell 4 vertically fastened and docked to the front side of the upper end of the bracket 2, a support shell 5 built into the shell 4 for supporting and guiding use, a motor 6 installed on the upper end of the support shell 5, a screw 7 docked at the lower end of the motor 6, and the screw 7 is vertically rotatably connected to the inside of the support shell 5, a movable seat 8 threadedly docked to the outside of the screw 7, a pouring barrel 9 installed on the upper end of the movable seat 8, a pouring head 10 provided at the lower end of the pouring barrel 9, a forming mold 11 relatively provided at the lower end of the pouring head 10, and a multifunctional cooling device 12 docked to the front side of the bracket 2. In this way, the multifunctional cooling device 12 can be used to achieve diverse spraying and cooling of the poured material.

[0058] Specifically, the forming mold 11 is placed on the upper end of the multifunctional cooling device 12. At the same time, the controller 3 can be used to realize the operation of the motor 6 provided at the upper end of the support shell 5. In this way, the screw 7 connected to the lower end of the motor 6 will rotate to realize the downward transmission of the movable seat 8 threaded on the outer side. As the movable seat 8 moves downward, the casting barrel 9 and the casting head 10 installed on the front side of the movable seat 8 can be moved downward. In this way, the casting head 10 can be close to the upper opening of the forming mold 11 to ensure the accuracy of casting and reduce the problem of casting offset. When the casting position adjustment is completed, the molten material can be poured into the casting barrel 9. In this way, with the casting head 10 connected to the bottom of the casting barrel 9, the molten material can be poured into the inside of the forming mold 11 for subsequent cooling and molding activities.

[0059] See also Figure 5-8The multifunctional cooling device 12 in this embodiment includes a protective shell 121 docked on the front side of the bracket 2 for protecting internal parts, a servo motor 122 installed on the left side of the protective shell 121, a gear 123 installed on the upper end of the servo motor 122, a gear ring 124 meshingly connected to the outer side of the gear 123, and a rotating shell 125 rotatably connected to the upper end of the protective shell 121 and connected to the outer side of the gear ring 124. In this way, the gear 123, the gear ring 124 and the rotating shell 125 can realize a rotation transmission state, so that the rotating shell 125 can rotate flexibly. To adjust the casting position of the forming mold 11, a receiving net 126 is installed inside the rotating shell 125, and the receiving net 126 can assist in realizing the recovery and reuse of cooling water. A receiving seat 127 is installed along the four sides of the receiving net 126, and the interior of the receiving seat 127 is connected to the forming mold 11, so that the stable receiving and casting cooperation of the forming mold 11 can be achieved. A spray cooling component 128 is installed inside the protective shell 121, and a vibration steering component 129 is provided inside the protective shell 121 and connected to the outside of the spray cooling component 128.

[0060] Among them, the spray cooling assembly 128 includes a lifting and rotating mechanism 1281 arranged inside the protective shell 121 and connected to the output end of the servo motor 122, a water tank 1282 docked to the right side of the lifting and rotating mechanism 1281 and arranged at the lower end of the protective shell 121, and a water inlet pipe is docked on the right side of the water tank 1282, and a cooling module is integrally installed at the lower end of the water tank 1282. The cooling module is consistent with the cooling equipment in the prior art, so its specific structure is not described in detail. In this way, it can be used for rapid replenishment of cooling water and rapid cooling of cooling water. The water pump installed inside the water tank 1282 1283, a water pipe 1284 vertically connected to the upper end of the water pump 1283 is used for transmitting cooling water upward for spraying cooling, and the water pipe 1284 is set in a telescopic tube state as a whole, so as to ensure the stable realization of the subsequent up and down reciprocating transmission and reciprocating swing process, a multi-way pipe 1285 connected to the upper end of the water pipe 1284, and the upper end of the water pipe 1284 is rotatably connected to the bottom of the multi-way pipe 1285, nozzles 1286 for multi-directional cooling spraying are equidistantly installed along the multi-way pipe 1285, and a recovery structure 1287 is installed on the outer side of the upper end of the water tank 1282 to realize auxiliary recovery of cooling water.

[0061] Among them, the lifting and rotating mechanism 1281 includes a driving wheel 12811 docked at the outside of the output end of the servo motor 122, a transmission belt 12812 connected to the outside of the driving wheel 12811, a driven wheel 12813 docked at the right side of the transmission belt 12812, a first bevel gear 12814 docked at the upper end of the driven wheel 12813, a second bevel gear 12815 meshingly connected to the upper end of the first bevel gear 12814, a docking rod 12816 movably connected to the middle of the second bevel gear 12815, and a horizontal groove is provided in the middle of the front and rear sides of the docking rod 12816, so that the docking rod 12816 can rotate with the second bevel gear 12815. During the rotation process, it can also be in a reciprocating horizontal transmission state, and the right side of the docking rod 12816 is movably connected to the left side of the water tank 1282, and is docked to the connecting shaft 12817 on the right side of the docking rod 12816, and the right end of the connecting shaft 12817 is overall in the shape of a smooth sphere, connected to the docking piece 12818 at the smooth sphere on the right side of the connecting shaft 12817, vertically movably sleeved on the outside of the water pipe 1284 and connected to the right side of the docking piece 12818, and docked to the upper end of the top rod 12819 to realize the protection of the internal parts. The protective box 128110 is vertically movably connected to the middle part of the receiving net 126.

[0062] Among them, the recovery structure 1287 includes a water receiving cover 12871 that is connected to the outer side of the upper end of the water tank 1282 and is connected to the water receiving cover 12871. The water receiving cover 12871 is arranged in an opening shape with a larger upper part and a smaller lower part. Recovery holes 12872 for cooling water recovery and transmission are symmetrically opened on the left and right sides of the outer end of the water tank 1282, and a water guide plate 12873 is built into the upper end of the water tank 1282. The left and right sides of the water guide plate 12873 are opposite to the inlets of the recovery holes 12872 on both sides, and are vertically connected to the recovery pipe 12874 at the lower right end of the water guide plate 12873.

[0063] Specifically, in order to realize the casting of multiple forming molds 11, the four forming molds 11 can be placed in sequence on the receiving seats 127 provided on the four sides of the receiving net 126, so that the four forming molds 11 can be stably placed and prepared for casting. When one forming mold 11 completes the casting activity, the servo motor 122 provided on one side of the protective shell 121 can be driven to make the servo motor 122 realize the rotation of the top connected gear 123. In this way, the gear 123 will be engaged with the gear ring 124 provided on the lower end of the rotating shell 125 for transmission, thereby realizing the rotation of the rotating shell 125, so that the next forming mold 11 is rotated until the pouring head 10 moves downward to carry out the casting activity. In this way, the placement and casting of multiple forming molds 11 can be flexibly realized, which greatly improves the casting efficiency of valve castings.

[0064] During the driving process of the servo motor 122, not only the rotation of the gear 123 can be realized, but also the rotation of the driving wheel 12811 can be realized. The rotating driving wheel 12811 can cooperate with the external transmission belt 12812 to realize the synchronous rotation of the driven wheel 12813 connected to the right side. As the driven wheel 12813 rotates, the first bevel gear 12814 and the second bevel gear 12815 provided at the upper end of the driven wheel 12813 can be meshed and driven. In this way, the second bevel gear 12814 and the second bevel gear 12815 connected to the second bevel gear 12813 can be meshed and driven. The docking rod 12816 in the middle of the bevel gear 12815 will rotate quickly to drive the connecting shaft 12817 connected to the right side, and the docking piece 12818 connected to the smooth sphere on the right side of the connecting shaft 12817 can realize the up and down reciprocating movement and reciprocating swing state of the ejector rod 12819 under the rotation transmission of the connecting shaft 12817, and the protective box 128110 docked at the upper end of the ejector rod 12819 can realize synchronous up and down reciprocating movement and reciprocating swing. In this way, when multiple molding dies 1 1. During the outer pouring activity, when cooling activity is required, the water pump 1283 provided at the lower end of the water tank 1282 can be driven to allow the water pump 1283 to transfer the cooling water inside the water tank 1282 into the water pipe 1284, and then the cooling water is transferred from the water pipe 1284 to the multi-way pipe 1285 connected at the upper end. With the diversion effect of the multi-way pipe 1285, the cooling water can be sprayed out from the nozzles 1286 connected at various locations outside the multi-way pipe 1285, so that the cooling water is directly sprayed onto the outside of the forming mold 11 to perform the spray cooling activity. In this way, the top rod 12819, which moves back and forth and swings back and forth along with the transmission of the connecting shaft 12817 and the docking piece 12818, will realize the up and down reciprocating movement and reciprocating swing of the protective box 128110 connected to the upper end, and the multi-way pipe 1285 and the nozzle 1286, thereby greatly enhancing the spray cooling range and efficiency, so that the cooling water can spray and cool the multiple forming molds 11 efficiently, accelerating the rapid solidification and molding of the casting materials inside the multiple forming molds 11;

[0065] Secondly, because the water conduit 1284 is configured as a telescopic tube, when the protective box 128110 performs the vertical reciprocating movement and reciprocating swinging movement of the multi-way pipe 1285 and the nozzle 1286, the water conduit 1284 can automatically expand and contract accordingly, thereby avoiding any obstruction to the vertical reciprocating movement and reciprocating swinging movement.

[0066] At the same time, when the cooling water is sprayed onto the outside of the multiple forming molds 11 for cooling, the cooling water will drip along the outside of the multiple forming molds 11 to the upper end of the receiving net 126 after cooling. The cooling water can flow into the water receiving cover 12871 at the lower end through the receiving net 126. The cooling water can be guided downward by the internal guide of the water receiving cover 12871 to move to the recovery holes 12872 opened on the left and right sides of the upper end of the water tank 1282. The cooling water can enter the upper end of the water tank 1282 through the recovery holes 12872 on both sides. Finally, the cooling water is received by the water guide plate 12873 provided at the upper end of the water tank 1282. The cooling water can be fed into the recovery pipe 12874 and recovered along the recovery pipe 12874 to the lower end of the water tank 1282 to be used for spray cooling again. In this way, the cooling water can be recycled and reused to avoid waste of cooling water. Secondly, the recovery stroke formed by the water receiving cover 12871, the recovery hole 12872, the water guide plate 12873 and the recovery pipe 12874 is relatively long, so that the cooling water can be initially cooled during the recovery process. Therefore, when it is re-flowed into the water tank 1282 for spray cooling again, there is no need for cooling process time, which speeds up the use efficiency.

[0067] See also Figure 9-12 The vibration steering assembly 129 in this embodiment includes a connecting ring 1291 that is fastened to the outside of the protective box 128110 and can realize downward extrusion transmission, a filter screen 1292 that is sleeved on the outside of the protective box 128110 and can be used for cooling water circulation and up and down movement, a vertical rod 1293 vertically inserted along the four sides of the filter screen 1292, and a compression spring 1294 corresponding to the outer end of the four-side vertical rod 1293 for rebound assist support, a fixed block 1295 symmetrically fastened to the upper and lower ends of the vertical rod 1293, and the fixed blocks 1295 on both sides are connected to the inner part of the lower end of the rotating shell 125, and an impact rotating structure 1296 is correspondingly arranged along the four sides of the upper end of the filter screen 1292 and abutted against the bottom of the four-side receiving seat 127. In this way, when the lifting and rotating mechanism 1281 realizes the lifting and rotating movement, the impact rotating structure 1296 can be synchronously driven to achieve simultaneous vibration defoaming and intermittent rotation transmission movement of the four-side molding mold 11.

[0068] Among them, the impact rotation structure 1296 includes a protrusion 12961 installed on the four sides of the upper end of the filter 1292, an impact ring 12962 that is movably embedded in the protrusion 12961 and used for impact vibration bubble elimination, and a connecting rod 12963 vertically inserted along the four sides of the impact ring 12962. In this way, the stability of the impact ring 12962 can be ensured. The outer ends of the four-side connecting rods 12963 are correspondingly installed and connected to the bottom of the four sides of the impact ring 12962. The spring 12964 is connected to the built-in tube 12965 in the middle of the protrusion 12961, and is laterally fastened to the convex shaft 12966 on one side of the inner part of the built-in tube 12965 for rotation transmission. The rotating cylinder 12967 is built into the inner part of the built-in tube 12965 and connected to the bottom of the receiving seat 127, and the outer side of the rotating cylinder 12967 is provided with multiple sections of continuously curved circulation grooves, and the convex shaft 12966 is connected to the circulation grooves provided on the outer side of the rotating cylinder 12967.

[0069] Specifically, when the protective box 128110 moves up and down with the transmission, it can synchronously drive the connecting ring 1291 connected to the outside, so that when the connecting ring 1291 moves down, it squeezes the filter 1292 connected to the outer side of the lower end of the protective box 128110. In this way, the filter 1292 can move downward stably through the vertical rods 1293 inserted on the four sides, and with the support of the elastic force of the compression springs 1294 connected to the outer ends of the four-side vertical rods 1293, when the connecting ring 1291 moves up with the protective box 128110, the filter 1292 can be pushed up and reset by the elastic force of the whole. In this way, the impact rotation structure 1296 installed on the four sides of the upper end of the filter 1292 will impact and vibrate the receiving seat 127, that is, impact rotation The protrusion 12961 provided inside the structure 1296 quickly moves toward the bottom of the receiving seat 127 when the filter 1292 is reset by the elastic assistance of the four-side compression springs 1294. As a result, the impact ring 12962 embedded in the upper end of the protrusion 12961 will quickly impact the receiving seat 127, causing the receiving seat 127 to vibrate to a certain extent. The vibrating receiving seat 127 will vibrate the material cast inside the forming mold 11. In this way, the material cast inside the forming mold 11 will undergo vibration bubble elimination activities, thereby avoiding the generation of casting bubbles, resulting in the appearance of more potholes on the outside of the subsequently cast valve casting. In addition, the overall casting quality of the valve casting can be improved, and the generation of potholes on the outside can be reduced.

[0070] At the same time, when the impact ring 12962 impacts with the transmission, the connecting rods 12963 and springs 12964 provided on the four sides of the impact ring 12962 can prevent the impact force from being too large, so that the vibration process of multiple forming molds 11 at the same time is stable, ensuring the synchronization of the elimination of oscillation bubbles in multiple forming molds 11, and avoiding the occurrence of omission problems.

[0071] Secondly, when the connecting ring 1291 squeezes the filter screen 1292, the built-in tube 12965 provided inside the convex block 12961 will move down synchronously, so that the convex shaft 12966 docked on one side of the built-in tube 12965 will drive the rotating drum 12967 docked at the bottom of the receiving seat 127, that is, the convex shaft 12966 drives the multiple sections of continuously curved circulation grooves opened on the outside of the rotating drum 12967, so that when the filter screen 1292 is squeezed down by the connecting ring 1291 and elastically assisted by the four-side compression springs 1294 to move up and reset, the convex shaft 12966 can drive the multiple sections of continuously curved circulation grooves opened on the outside of the rotating drum 12967. The grooves cooperate with each other to realize the intermittent rotation of the receiving seat 127 as a whole. In this way, the multiple forming molds 11 placed inside the receiving seat 127 and rotating with the rotating receiving net 126 will rotate along with the rotating receiving seat 127. In this way, it can be ensured that the outer side of the forming mold 11 is in full contact with the cooling water sprayed by the nozzle 1286, ensuring that the forming mold 11 as a whole realizes uniform spraying and cooling activities, avoiding the fixed position of the forming mold 11, resulting in uneven cooling of the overall forming mold 11, and causing the material cast inside the forming mold 11 to cool unevenly, affecting the subsequent processing and preparation efficiency.

[0072] 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 aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A valve casting with crack resistance, characterized in that: The valve casting body (1) comprises a casting body (11) and an anti-cracking coating (12), and the anti-cracking coating (12) is sprayed on the outside of the casting body (11).

2. A valve casting having crack resistance according to claim 1, characterized in that: The anti-cracking coating (12) is composited from one or more of PTFE coating, polyethersulfone resin, silicone resin, epoxy resin, acrylic resin, polyphenylene sulfide resin and polyamide-imide resin.

3. A method for processing a valve casting having crack resistance according to claim 1, characterized in that: The steps include: S1: Mold making: according to the valve casting production requirements, make the corresponding casting mold; S2: Material smelting, melting the metal material into a molten state through a smelting furnace; S3: Material pouring and cooling, pouring the molten material into the mold through the pouring equipment, and then cooling it to cool the poured material; S4: Grinding and polishing: the valve casting that has been cast and cooled is passed through a grinding and polishing device to grind and polish the external burrs; S5: Coating spraying: after grinding and polishing, the anti-cracking spraying is carried out on the outside of the valve casting by a spraying machine; S6: Valve casting packaging, combine the sprayed valve casting with other valve parts and package them.

4. A method for processing a valve casting having crack resistance according to claim 3, characterized in that: The casting equipment in step S3 comprises a support (2), a controller (3) mounted on the upper end of the support (2), a shell (4) fastened to one side of the upper end of the support (2), a support shell (5) arranged inside the shell (4), a motor (6) mounted on the upper end of the support shell (5), a screw (7) connected to the lower end of the motor (6), a movable seat (8) threadedly connected to the outer side of the screw (7), a casting cylinder (9) mounted on the upper end of the movable seat (8), a casting head (10) arranged at the lower end of the casting cylinder (9), a molding die (11) arranged relatively to the lower end of the casting head (10), and a multifunctional cooling device (12) connected to the front side of the support (2).

5. A method for processing a valve casting having crack resistance according to claim 4, characterized in that: The multifunctional cooling device (12) comprises a protective shell (121) docked at the front side of the bracket (2), a servo motor (122) arranged on one side of the interior of the protective shell (121), a gear (123) mounted on the upper end of the servo motor (122), a gear ring (124) meshed with the outer side of the gear (123), a rotating shell (125) arranged at the upper end of the protective shell (121) and connected to the outer side of the gear ring (124), a receiving net (126) mounted inside the rotating shell (125), a receiving seat (127) mounted inside the receiving net (126), a spray cooling component (128) arranged inside the protective shell (121), and a vibration steering component (129) arranged inside the protective shell (121) and connected to the outer side of the spray cooling component (128).

6. A method for processing a valve casting having crack resistance according to claim 5, characterized in that: The spray cooling assembly (128) comprises a lifting and rotating mechanism (1281) disposed inside the protective shell (121) and connected to the output end of the servo motor (122), a water tank (1282) connected to the right side of the lifting and rotating mechanism (1281) and disposed at the lower end of the protective shell (121), a water pump (1283) installed inside the water tank (1282), a water pipe (1284) connected to the upper end of the water pump (1283), a multi-way pipe (1285) connected to the upper end of the water pipe (1284), a spray head (1286) connected to the outside of the multi-way pipe (1285), and a recovery structure (1287) installed on the outer side of the upper end of the water tank (1282).

7. A method for processing a valve casting having crack resistance according to claim 6, characterized in that: The lifting and rotating mechanism (1281) comprises a driving wheel (12811) connected to the outside of the output end of the servo motor (122), a transmission belt (12812) connected to the outside of the driving wheel (12811), a driven wheel (12813) connected to the right side of the transmission belt (12812), a first bevel gear (12814) provided at the upper end of the driven wheel (12813), and a second bevel gear (12814) meshed with the upper end of the first bevel gear (12814). 815), a docking rod (12816) inserted in the middle of the second bevel gear (12815), a connecting shaft (12817) docked to the right side of the docking rod (12816), a docking piece (12818) connected to the right side of the connecting shaft (12817), a top rod (12819) connected to the outside of the water pipe (1284) and connected to the right side of the docking piece (12818), and a protective box (128110) arranged at the upper end of the top rod (12819).

8. A method for processing a valve casting having crack resistance according to claim 6, characterized in that: The recovery structure (1287) comprises a water receiving cover (12871) installed on the outer side of the upper end of the water tank (1282), recovery holes (12872) opened on both sides of the outer end of the water tank (1282), a water guide plate (12873) built into the water tank (1282), and a recovery pipe (12874) connected to the lower end of one side of the water guide plate (12873).

9. A method for processing a valve casting having crack resistance according to claim 5, characterized in that: The vibration steering assembly (129) comprises a connecting ring (1291) fastened to the outside of the protection box (128110), a filter (1292) sleeved on the outside of the protection box (128110), a vertical rod (1293) plugged into four sides of the filter (1292), a compression spring (1294) arranged on the outside of the vertical rod (1293), a fixing block (1295) installed at the upper and lower ends of the vertical rod (1293), and an impact rotation structure (1296) arranged at the upper end of the filter (1292) and abutting against the bottom of the receiving seat (127).

10. A method for processing a valve casting having crack resistance according to claim 9, characterized in that: The impact rotating structure (1296) comprises a protrusion (12961) arranged at the upper end of the filter (1292), an impact ring (12962) embedded in the protrusion (12961), a connecting rod (12963) inserted into the side of the impact ring (12962), a spring (12964) connected to the outside of the connecting rod (12963), an inner tube (12965) arranged in the middle of the protrusion (12961), a convex shaft (12966) fastened to one side of the inner tube (12965), and a rotating drum (12967) installed in the inner tube (12965) and connected to the bottom of the receiving seat (127), wherein the convex shaft (12966) is connected to the inner part of the rotating drum (12967).

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