A low-pressure casting forming device for super-ultra-high voltage GIS aluminum alloy conductors

Abstract

The application relates to the technical field of casting forming devices, and discloses a low-pressure casting forming device for super-high-voltage GIS aluminum alloy conductors, which comprises an upper mold and a lower mold, the upper mold and the lower mold are attached to each other, a cavity is arranged between the upper mold and the lower mold, a feeding opening is arranged on one side of the lower mold, a plurality of support tables are arranged on the upper mold, the support tables are arranged according to the shape of the super-high-voltage GIS aluminum alloy conductor, the support tables are located in the key areas of the casting, such as the connecting parts of the casting and the areas with special shapes, and an adjusting assembly is arranged on the support tables; an coating assembly is arranged between the upper mold and the lower mold; the adjusting assembly is used for adjusting the local cooling effect according to the casting process; and the coating assembly is used for coating the surface of the lower mold. Compared with the prior art, the application realizes accurate control of the cooling and forming in the low-pressure casting process of the super-high-voltage GIS aluminum alloy conductor, and guarantees the size precision and use reliability of the casting.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of casting forming devices, in particular to a low-pressure casting forming device for super-high-voltage GIS aluminum alloy conductors. BACKGROUND

[0002] The aluminum alloy conductors in super-high-voltage gas insulated switch (GIS) equipment are generally formed by using a low-pressure casting process. The low-pressure casting process is widely applied to the manufacturing of thick-section and complex-structure conductor components due to its stable filling and high compactness. However, the existing low-pressure casting process still has some problems in specific application.

[0003] Firstly, the super-high-voltage GIS aluminum alloy conductor usually has a complex spatial structure and a large overall size, and there are usually local thick sections or obvious hot spots in the cavity. In the casting process, these parts are prone to form shrinkage holes, shrinkage porosity and other defects due to the slow solidification speed of the metal liquid. In the prior art, a fixed chill is usually arranged at the corresponding position of the mold for forced cooling. However, the cooling intensity and position of the chill cannot be adjusted, and it is difficult to flexibly control according to the size of different products, the difference in wall thickness and the real-time solidification condition. If the cooling is insufficient, there is still a risk of shrinkage holes in the hot spot part. If the cooling is too strong, the metal may be locally supercooled, causing cracks, stress concentration and other problems, thereby seriously affecting the compactness of the casting and the overall performance. Secondly, in the low-pressure casting process, the mold cavity inevitably entrains some gas when the aluminum liquid fills the mold, or hydrogen gas is precipitated during the solidification shrinkage. If the gas cannot be discharged in time, air bubbles or pores will be formed in the casting. These defects are usually distributed in a hidden manner, which not only affects the electrical performance of the conductor, but also reduces the mechanical strength. Most of the existing improvement schemes rely on post-casting heat treatment to alleviate the problem, or the whole mold is vibrated during the casting process to promote the escape of gas. However, the post-casting heat treatment can only partially improve the organization and cannot completely eliminate the pores. Although the whole mold vibration can enhance the fluidity of the liquid metal, it has low efficiency and causes long-term impact and fatigue load on the whole mold, thereby shortening the service life of the mold and increasing the maintenance cost. At the same time, the whole mold vibration cannot improve the local defect area, and lacks the ability of targeted and fine control. Therefore, the application discloses a low-pressure casting forming device for super-high-voltage GIS aluminum alloy conductors to improve the forming precision, compactness of the casting and service life of the mold during the casting of the GIS aluminum alloy conductor. SUMMARY

[0004] In view of the defects of the prior art, the application provides a low-pressure casting forming device for an ultra-high-voltage GIS aluminum alloy conductor, which has the advantages of flexible adjustment of local cooling effect and reduction of casting shrinkage and cracks, and solves the problem of difficulty in flexible control of the cooling position of the chill according to different product sizes, wall thickness differences and real-time solidification conditions in the prior art.

[0005] To achieve the above object, the application provides the following technical scheme: a low-pressure casting forming device for an ultra-high-voltage GIS aluminum alloy conductor, comprising an upper mold and a lower mold, the upper mold and the lower mold are attached, a cavity is arranged between the upper mold and the lower mold, a feeding opening is arranged on one side of the lower mold, a plurality of support tables are arranged on the upper mold, the support tables are arranged according to the shape of the ultra-high-voltage GIS aluminum alloy conductor, the support tables are located in the key areas of the casting, such as the connecting parts of the casting and the areas with special shapes, and an adjusting assembly is arranged on the support tables; a coating assembly is arranged between the upper mold and the lower mold; the adjusting assembly is used for adjusting the local cooling effect according to the casting process; and the coating assembly is used for coating the surface of the lower mold.

[0006] Preferably, the adjusting assembly comprises a moving rod arranged in the support table, a threaded section is formed in the moving rod, the threaded section is sleeved with a threaded sleeve in the support table, one end of the moving rod is provided with a rotating disc, a worm is arranged on the moving rod, the other end of the moving rod is provided with a chill core block, the chill core block is a solid chill, a cooling cavity is arranged on the upper mold, one end of the cooling cavity extends into the upper mold, and the chill core block is slidably arranged in the cooling cavity.

[0007] Preferably, the coating assembly comprises a set of moving seats arranged on the lower mold, a sliding seat is arranged in the moving seat and slides, the moving seat is located on both sides of the lower mold, the moving seat is not in contact with the cavity between the upper mold and the lower mold, a first connecting arm is arranged on the sliding seat, a support rod is arranged at the center of the first connecting arm, a second connecting arm is arranged on the support rod, one end of the second connecting arm is arranged in the upper mold, the other end of the second connecting arm is arranged on the lower mold, a mounting cylinder is arranged on one side of the first connecting arm, a rotating rod is arranged in the mounting cylinder, an installation table is arranged at one end of the rotating rod, a guide rod is arranged on one side of the installation table, the guide rod is of a telescopic structure, an installation plate is arranged at one end of the guide rod, the installation plate is arranged in a T shape, a limiting spring is sleeved on the guide rod, one end of the limiting spring is arranged on one side of the installation table, the other end of the limiting spring is arranged on one side of the installation plate, a coating roller is arranged on the installation plate, a plurality of friction grooves are formed on the surface of the coating roller, the coating roller can be in contact with the surface of the lower mold, and different types of coating rollers can be replaced according to different use scenarios.

[0008] Preferably, the cooling cavity is arranged in a V shape and other shapes, the shape of the cold iron core block is matched with the cooling cavity, and a plurality of diffusion grooves are formed in the surface of the cold iron core block.

[0009] Preferably, a connecting cylinder is arranged at the top of the cold iron core block, the connecting cylinder is hollow, a limiting plate is arranged at the top of the connecting cylinder, one end of the moving rod extends into the connecting cylinder, and a limiting disc is arranged at one end of the moving rod and can be in contact with the limiting plate.

[0010] Preferably, a first connecting rod is arranged on the inner wall of the support table, a rotating wheel is arranged on the first connecting rod, a plurality of grooves are formed in the surface of the rotating wheel, and the rotating wheel is engaged with the worm.

[0011] Preferably, a second connecting rod is arranged on the inner wall of one end of the support table, a deflection arm is arranged on the second connecting rod, a contact head is arranged at one end of the deflection arm, the contact head can be in contact with the grooves in the surface of the rotating wheel, a vibration plate is arranged at the other end of the deflection arm, a plurality of vibration heads are arranged on one side of the vibration plate, a vibration isolation base is arranged on the surface of the upper mold, the vibration heads can be in contact with the surface of the vibration isolation base, a reset spring is arranged on one side of the vibration plate, and the other end of the reset spring is arranged on the surface of the upper mold.

[0012] Preferably, the vibration plate can be replaced by a vibration source according to use requirements, and the vibration source can be remotely controlled.

[0013] Preferably, one side of the mounting cylinder is provided with a limiting groove, and the rotating rod is provided with a limiting block which can contact with the two sides of the limiting groove.

[0014] Preferably, the coating roller can be replaced with different types according to different use scenarios.

[0015] Compared with the prior art, the application provides a low-pressure casting forming device for an ultra-high-voltage GIS aluminum alloy conductor, which has the following beneficial effects:

[0016] 1. The low-pressure casting forming device for the ultra-high-voltage GIS aluminum alloy conductor, by mutually adhering the upper mold and the lower mold to form a cavity, injecting aluminum alloy melt into the injection port on one side of the lower mold, and forming and gradually solidifying the aluminum liquid in the cavity, in order to ensure the forming quality of the key parts and complex regions of the casting, a plurality of support tables are arranged on the upper mold, the support tables are located at the connecting parts and special-shaped regions of the casting, and the adjusting assembly installed on the support tables can cool and adjust the local regions according to the casting process, so as to realize accurate control of the solidification speed, and meanwhile, the coating assembly arranged between the upper mold and the lower mold can coat the surface of the lower mold, reduces the direct adhesion of the aluminum liquid to the mold, and improves the flowability and forming stability of the metal liquid in the mold; the device can realize local cooling control in the key regions of the casting, effectively reduces the risk of shrinkage holes and cracks, improves the compactness and mechanical properties of the casting, the coating assembly can form an isolation layer in the casting process, reduces the friction and adhesion of the aluminum liquid to the lower mold, prolongs the service life of the mold, and improves the forming quality of the surface of the aluminum alloy conductor, and the device realizes accurate control of cooling and forming in the low-pressure casting process of the ultra-high-voltage GIS aluminum alloy conductor, and guarantees the dimensional accuracy and use reliability of the casting.

[0017] 2. The low-pressure casting forming device for the ultra-high-voltage GIS aluminum alloy conductor, by rotating the rotating disc at the end part of the user, the screw thread rotation is converted into the axial linear displacement of the moving rod, so as to drive the cold iron core block connected to the other end of the moving rod to slide along the length direction of the cooling cavity, in order to prevent the position from retreating due to thermal load or vibration in the casting process, the moving rod is further provided with a worm, the worm is engaged with the worm gear segment in the support table to form a two-stage self-locking and stable displacement mechanism, which not only enhances the transmission stability, but also guarantees the stable and reliable adjusting process.

[0018] 3. The low-pressure casting forming device for the super-high voltage GIS aluminum alloy conductor, when casting and pouring, the aluminum alloy liquid fills the mold through the pouring port, the cold iron core block is inserted into the cooling cavity at different depths according to the conductor section thickness and the hot spot distribution under the driving of the moving rod, the cooling cavity is designed in a V shape or other geometric shapes, can provide a multi-directional guide surface when the cold iron core block is embedded, so that the cold iron and the local area of the casting are in close contact, the diffusion grooves uniformly distributed on the outer surface of the cold iron core block form cooling channels or increase the heat exchange area, when the heat flows through the diffusion grooves, the heat can quickly spread and conduct, prompting the aluminum liquid in this part to solidify preferentially, realizing local directional cooling and shrinkage hole compensation.

[0019] 4. The low-pressure casting forming device for the super-high voltage GIS aluminum alloy conductor, at the top of the cold iron core block, the connecting cylinder serves as the containing and transition structure between the moving rod and the cold iron core block, the inside is a hollow cavity, and the top is provided with a limiting plate; the end of the moving rod extends into the connecting cylinder and is provided with a limiting disc, when the moving rod is pushed to the maximum stroke, the limiting disc abuts against the limiting plate, so as to realize mechanical hard limiting, avoiding the conflict of the cold iron with the mold wall or the casting due to excessive pushing; when it is retracted, the limiting disc also forms reverse positioning with the limiting plate, ensuring that each operation is repeatedly positioned within the set range; the adjusting assembly can flexibly adjust the local cooling effect, reduce the defects such as shrinkage and cracks of the casting, and improve the forming quality and structural compactness of the super-high voltage GIS aluminum alloy conductor.

[0020] 5. The low-pressure casting forming device for the super-high voltage GIS aluminum alloy conductor, the moving seat provided on the lower mold realizes overall bearing and support, the sliding seat is slidably arranged in the moving seat, and can stably move in a specific direction under the action of the guide structure of the moving seat, so as to drive the first connecting arm mounted thereon to adjust the position, the first connecting arm and the second connecting arm form linkage through the support rod at the center thereof, the support rod not only plays a vertical supporting role, but also provides a pivot joint point for force transmission between the first connecting arm and the second connecting arm, with the sliding of the sliding seat, the first connecting arm drives the support rod to move, and then drives the second connecting arm to make synchronous adjustment between the upper mold and the lower mold, so that the coating assembly can realize flexible adjustment of the overall position to adapt to different mold sizes and opening and closing states.

[0021] 6、The low-pressure casting forming device for super-high voltage GIS aluminum alloy conductors, in the coating process, the friction groove can effectively adsorb and carry the coating liquid when the coating roller is in contact with the mold surface and rotates, and evenly spread the coating liquid to the mold surface during rotation to form a continuous and consistent coating layer. This friction groove structure not only enhances the retention capacity of the coating liquid, but also avoids local accumulation and sagging of the coating liquid, significantly improving the uniformity and adhesion of the coating layer. At the same time, the coating roller can be quickly replaced according to different use scenarios and process requirements, such as replacing a high-absorptive felt roller, a high-temperature-resistant metal wire roller, or a microporous roller, thereby having strong adaptability.

[0022] 7、The low-pressure casting forming device for super-high voltage GIS aluminum alloy conductors, in order to ensure the stability of the rotating rod during use, a limiting groove is opened in the side wall of the installation cylinder, and a limiting block is arranged on the rotating rod. The limiting block can be in contact with the limiting groove on both sides during rotation of the rotating rod, thereby limiting the rotation angle range and preventing excessive rotation or deviation of the rotating rod, ensuring that the coating roller maintains a reasonable contact angle and contact pressure during coating, and improving the operation safety and stability.

[0023] 8、The low-pressure casting forming device for super-high voltage GIS aluminum alloy conductors, when the worm rotates, the rotating wheel is engaged with the worm arranged on the moving rod, and the helical teeth of the worm are engaged with the tooth grooves of the rotating wheel, thereby driving the rotating wheel to rotate continuously. In order to ensure the stability and transmission accuracy of the engagement, a plurality of grooves are uniformly opened on the outer surface of the rotating wheel. These grooves not only play a guiding role in engagement, but also provide positioning points for subsequent deflection driving. A second connecting rod is arranged on the inner wall of the other end of the support table, and a deflection arm is assembled on the second connecting rod. One end of the deflection arm is provided with a contact head, which is in abutment with the surface groove of the rotating wheel. When the rotating wheel rotates, the surface groove periodically pushes the contact head, causing the deflection arm to reciprocate around the mounting point of the second connecting rod, so that the deflection arm can realize regular and controllable deflection movement. The other end of the deflection arm is fixedly connected with a vibration plate, so that the reciprocating motion of the deflection arm is transmitted to the vibration plate, causing the vibration plate to vibrate periodically. A plurality of vibration heads are uniformly distributed on one side of the vibration plate. When the vibration plate vibrates, the vibration heads reciprocate linearly and continuously strike the vibration isolation base arranged on the upper mold surface at a certain frequency. The vibration isolation base acts as a transition component, converting the mechanical impact of the vibration heads into stable vibration force and transmitting it to the upper mold, while also buffering and dispersing stress to avoid adverse impact or damage to the mold body.

[0024] 9. The low-pressure casting forming device for super-high voltage GIS aluminum alloy conductors directly installs a fixing seat on the outer surface of a support table or an upper mold through vibration coupling with the original vibration head or vibration isolation base; the control end of a vibration source is connected with an external control system, remote start and stop and parameter adjustment can be realized; an operator can flexibly set the working state of the vibration source, including vibration frequency, vibration amplitude and action time, according to different stages of the casting process through a remote control module; for example, low amplitude and frequency vibration can be selected in the initial stage of aluminum liquid filling to assist gas floating and discharging; strong amplitude vibration can be applied for a short time in the solidification shrinkage stage of the casting to promote shrinkage compensation and grain refinement; the remote control mode not only improves the safety and convenience of operation, but also avoids direct contact of personnel with the high-temperature mold environment; in the cold iron adjacent area, vibration promotes aluminum liquid flow and gas escape, and cold iron accelerates solidification, the combination of the two can significantly improve the local structure and reduce common defects such as shrinkage holes and pores. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a three-dimensional structure schematic diagram of the casting process of the application;

[0026] Figure 2 It is a three-dimensional structure schematic diagram of the mold taking process of the application;

[0027] Figure 3 It is a three-dimensional structure schematic diagram of the support table of the application;

[0028] Figure 4 It is a three-dimensional structure schematic diagram of the cooling cavity of the application;

[0029] Figure 5 It is a three-dimensional structure schematic diagram of the cold iron core block of the application;

[0030] Figure 6 It is a three-dimensional structure schematic diagram of the vibration plate of the application;

[0031] Figure 7 It is a three-dimensional structure schematic diagram of the cooling cavity of the application;

[0032] Figure 8 It is a three-dimensional structure schematic diagram of the coating assembly of the application;

[0033] Figure 9 It is a three-dimensional structure schematic diagram of the application Figure 8 It is a three-dimensional structure schematic diagram of the application

[0034] Figure 10 It is a schematic diagram of the movement direction of the coating roller of the application.

[0035] In the figure: 1, upper mold; 2, lower mold; 3, injection port; 4, cooling cavity; 5, cold core block; 6, diffusion groove; 7, connecting cylinder; 8, limiting plate; 9, moving rod; 10, threaded section; 11, rotating disc; 12, worm; 13, support table; 14, first connecting rod; 15, rotating wheel; 16, second connecting rod; 17, deflection arm; 18, contact head; 19, vibrating plate; 20, vibrating head; 21, return spring; 22, vibration isolation base; 23, vibration source; 24, moving seat; 25, first connecting arm; 26, second connecting arm; 27, support rod; 28, sliding seat; 29, mounting cylinder; 30, limiting groove; 31, rotating rod; 32, limiting block; 33, mounting table; 34, guide rod; 35, limiting spring; 36, mounting plate; 37, coating roller; 38, friction groove. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0037] As introduced in the background, the deficiencies in the prior art exist, in order to solve the above technical problems, the present application provides a low-pressure casting forming device for super-high-voltage GIS aluminum alloy conductor.

[0038] In a typical embodiment of the present application, as shown in Figures 1-10 A low-pressure casting forming device for super-high-voltage GIS aluminum alloy conductor, comprising an upper mold 1 and a lower mold 2, the upper mold 1 and the lower mold 2 are attached, a cavity is arranged between the upper mold 1 and the lower mold 2, an injection port 3 is arranged on one side of the lower mold 2, a plurality of support tables 13 are arranged on the upper mold 1, the support tables 13 are arranged according to the shape of the super-high-voltage GIS aluminum alloy conductor, the support tables 13 are located in the key areas of the casting, such as the connecting parts of the casting and the areas with special shapes, and an adjusting assembly is arranged on the support tables 13; a coating assembly is arranged between the upper mold 1 and the lower mold 2; the adjusting assembly is used to adjust the local cooling effect according to the casting process; the coating assembly is used to coat the surface of the lower mold 2;

[0039] The cavity is formed by mutual adhesion of the upper die 1 and the lower die 2, and the aluminum alloy melt is injected into the cavity through the injection port 3 on one side of the lower die 2, and the aluminum liquid is formed and gradually solidified in the cavity. In order to ensure the forming quality of the key parts and complex areas of the casting, a plurality of support tables 13 are arranged on the upper die 1, the support tables 13 are located at the connecting parts and special shape areas of the casting, and the adjusting assembly installed on the support table 13 can cool and adjust the local area according to the casting process, so as to realize accurate control of the solidification speed. At the same time, the coating assembly arranged between the upper die 1 and the lower die 2 can coat the surface of the lower die 2, reduce the direct adhesion of the aluminum liquid to the die, and improve the fluidity and forming stability of the metal liquid in the die. The device can realize local cooling control in the key area of the casting, effectively reduce the risk of shrinkage and cracks, improve the density and mechanical properties of the casting, the coating assembly can form an isolation layer during the casting process, reduce the friction and adhesion between the aluminum liquid and the lower die 2, prolong the service life of the die, and at the same time improve the forming quality of the surface of the aluminum alloy conductor. The device realizes accurate control of cooling and forming in the low-pressure casting process of the super-high-voltage GIS aluminum alloy conductor, and ensures the size accuracy and use reliability of the casting.

[0040] As a preferred embodiment in the present embodiment, reference is made to the accompanying drawings Figures 1-5 The adjusting assembly comprises a moving rod 9 arranged in the support table 13, a threaded section 10 is formed in the moving rod 9, the threaded section 10 is sleeved with a threaded sleeve in the support table 13, one end of the moving rod 9 is provided with a rotating disc 11, a worm 12 is arranged on the moving rod 9, the other end of the moving rod 9 is provided with a chill core 5, the chill core 5 is a solid chill, a cooling cavity 4 is arranged on the upper die 1, one end of the cooling cavity 4 extends into the upper die 1, and the chill core 5 is slidably arranged in the cooling cavity 4; the cooling cavity 4 is V-shaped or has other shapes, the shape of the chill core 5 is matched with the cooling cavity 4, a plurality of diffusion grooves 6 are formed in the surface of the chill core 5; a connecting cylinder 7 is arranged on the top of the chill core 5, the connecting cylinder 7 is hollow, a limiting plate 8 is arranged on the top of the connecting cylinder 7, one end of the moving rod 9 extends into the connecting cylinder 7, and one end of the moving rod 9 is provided with a limiting disc which can contact the limiting plate 8;

[0041] When the user rotates the rotating disc 11 at the end, the screw rotation movement is converted into the axial linear displacement of the moving rod 9, thereby driving the cold iron block 5 connected to the other end of the moving rod 9 to slide along the length direction of the cooling cavity 4. In order to prevent the position from falling back due to thermal load or vibration during the casting process, the worm 12 is further arranged on the moving rod 9, the worm 12 is engaged with the worm gear segment in the support table 13, forming a two-stage self-locking and stable displacement mechanism, which not only enhances the transmission stability, but also ensures the smooth and reliable adjustment process. During the casting pouring, the aluminum alloy liquid fills the mold through the pouring port 3, and the cold iron block 5 is driven by the moving rod 9 to be accurately inserted into different depths of the cooling cavity 4 according to the conductor cross-section thickness and thermal joint distribution. The cooling cavity 4 is designed as a V shape or other geometric shapes, which can provide a multi-directional guide surface when the cold iron block 5 is embedded, so that the cold iron and the local area of the casting are in close contact. The diffusion grooves 6 uniformly distributed on the outer surface of the cold iron block 5 form cooling channels or increase the heat exchange area. When the heat flows through the diffusion grooves 6, the heat can quickly spread and conduct, promoting the preferential solidification of the aluminum liquid at this part, realizing local directional cooling and shrinkage compensation. At the top of the cold iron block 5, the connecting cylinder 7 serves as the accommodation and transition structure between the moving rod 9 and the cold iron block 5, which is a hollow cavity inside, and the top is provided with a limiting plate 8. The end of the moving rod 9 extends into the connecting cylinder 7 and is provided with a limiting disc. When the moving rod 9 is pushed to the maximum stroke, the limiting disc abuts against the limiting plate 8, thereby realizing mechanical hard limiting and avoiding the conflict between the cold iron and the mold wall or the casting due to excessive pushing. When it is retracted, the limiting disc also forms reverse positioning with the limiting plate 8, ensuring that each operation is repeatedly positioned within the set range. The adjustment assembly can flexibly adjust the local cooling effect, reduce defects such as shrinkage and cracks of the casting, and improve the forming quality and structural compactness of the super-high-voltage GIS aluminum alloy conductor.

[0042] As a preferred embodiment in the present embodiment, reference is made to the accompanying drawings Figure 1 、 Figure 2 、 Figures 8-10The coating assembly comprises a set of moving seats 24 arranged on the lower mold 2, the moving seats 24 are located on both sides of the lower mold 2, the moving seats 24 are not in contact with the cavity between the upper mold 1 and the lower mold 2, a sliding seat 28 is slidably arranged in the moving seat 24, a first connecting arm 25 is arranged on the sliding seat 28, a support rod 27 is arranged at the center of the first connecting arm 25, a second connecting arm 26 is arranged on the support rod 27, one end of the second connecting arm 26 is arranged in the upper mold 1, the other end of the second connecting arm 26 is arranged on the lower mold 2, an installation cylinder 29 is arranged on one side of the first connecting arm 25, a rotating rod 31 is arranged in the installation cylinder 29, an installation table 33 is arranged at one end of the rotating rod 31, a guide rod 34 is arranged on one side of the installation table 33, the guide rod 34 is of a telescopic structure, an installation plate 36 is arranged at one end of the guide rod 34, the installation plate 36 is arranged in a T shape, a limiting spring 35 is sleeved on the guide rod 34, one end of the limiting spring 35 is arranged on one side of the installation table 33, the other end of the limiting spring 35 is arranged on one side of the installation plate 36, a coating roller 37 is arranged on the installation plate 36, a plurality of friction grooves 38 are formed in the surface of the coating roller 37, the coating roller 37 can be in contact with the surface of the lower mold 2, and the coating roller 37 can be replaced with different types according to different use scenarios; a limiting groove 30 is formed in one side of the installation cylinder 29, and a limiting block 32 is arranged on the rotating rod 31, the limiting block 32 can be in contact with both sides of the limiting groove 30;

[0043] The moving seat 24 arranged on the lower mold 2 realizes overall bearing and support, the sliding seat 28 is slidably arranged in the moving seat 24, the sliding seat 28 can move stably in a specific direction under the action of the guide structure of the moving seat 24, so as to drive the first connecting arm 25 mounted thereon to adjust the position, the first connecting arm 25 forms linkage with the second connecting arm 26 through the support rod 27 at the center, the support rod 27 not only plays a vertical supporting role, but also provides a pivot joint point for force transmission between the first connecting arm 25 and the second connecting arm 26, with the sliding of the sliding seat 28, the first connecting arm 25 drives the support rod 27 to move, and then drives the second connecting arm 26 to make synchronous adjustment between the upper mold 1 and the lower mold 2, so that the coating assembly can realize flexible adjustment of the overall position to adapt to different mold sizes and opening and closing states;

[0044] A mounting cylinder 29 is mounted on one side of the first connecting arm 25, a rotating rod 31 is coaxially mounted in the mounting cylinder 29, the rotating rod 31 can freely rotate in the limiting structure of the mounting cylinder 29, the end thereof is connected with a mounting table 33, the mounting table 33 can produce rotation and small-angle adjustment to change the contact angle and contact position of the coating roller 37 with the surface of the lower mold 2 under the drive of the rotating rod 31 in the first connecting arm 25, so as to ensure the uniformity of coating, a guide rod 34 is arranged on the mounting table 33, the guide rod 34 is a telescopic structure, a limiting spring 35 is sleeved on the outer periphery thereof, one end of the guide rod 34 is connected with the mounting table 33, the other end is fixed with a mounting plate 36, the mounting plate 36 is designed in a T shape to enhance the lateral stability, when the coating roller 37 is contacted with the surface of the lower mold 2 and is subjected to uneven pressure, the guide rod 34 can be correspondingly telescoped, the limiting spring 35 provides reverse elastic support to realize the automatic reset and buffering of the coating roller 37, so as to avoid the uneven coating caused by the local height difference of the mold surface;

[0045] The coating roller 37 is mounted at the lower end of the mounting plate 36, friction grooves 38 are uniformly formed on the surface of the coating roller 37, in the coating process, the friction grooves 38 can effectively adsorb and carry the coating liquid when the coating roller 37 is contacted with the mold surface and rotated, and uniformly spread the coating liquid to the mold surface in the rotating process to form a continuous and consistent coating layer, such a friction groove 38 structure not only enhances the holding capacity of the coating liquid, but also avoids the local accumulation and sagging of the coating liquid, significantly improves the uniformity and adhesion of the coating layer, at the same time, the coating roller 37 can be quickly replaced according to different use scenarios and process requirements, for example, replaced with a high-absorptive felt roller, a high-temperature-resistant metal wire roller or a microporous roller, so as to have strong adaptability;

[0046] In order to ensure the stability of the rotating rod 31 in the use process, a limiting groove 30 is formed in the side wall of the mounting cylinder 29, a limiting block 32 is arranged on the rotating rod 31, the limiting block 32 can be contacted with both sides of the limiting groove 30 in the rotating process of the rotating rod 31, so as to limit the rotation angle range, prevent the rotating rod 31 from excessively rotating or deviating, ensure that the coating roller 37 always maintains a reasonable contact angle and contact pressure in the coating process, and improve the operation safety and stability; through the above steps, the coating layer can be stably and uniformly applied to the mold surface in the casting process, the lubricity and demolding performance of the mold are effectively improved, the service life of the mold is prolonged, and at the same time, the surface quality and yield of the casting are ensured.

[0047] As a preferred embodiment in the present embodiment, reference is made to the accompanying drawings Figures 1-3 、 Figure 6The inner wall of the support table 13 is provided with a first connecting rod 14, the first connecting rod 14 is provided with a rotating wheel 15, a plurality of grooves are formed in the surface of the rotating wheel 15, and the rotating wheel 15 is engaged with the worm 12; the inner wall of one end of the support table 13 is provided with a second connecting rod 16, the second connecting rod 16 is provided with a deflection arm 17, one end of the deflection arm 17 is provided with a contact head 18, the contact head 18 can be in contact with the groove in the surface of the rotating wheel 15, the other end of the deflection arm 17 is provided with a vibrating plate 19, one side of the vibrating plate 19 is provided with a plurality of vibration heads 20, the surface of the upper mold 1 is provided with a vibration isolation base 22, the vibration head 20 can be in contact with the surface of the vibration isolation base 22, one side of the vibrating plate 19 is provided with a return spring 21, and the other end of the return spring 21 is arranged on the surface of the upper mold 1;

[0048] When the worm 12 rotates, the rotating wheel 15 is engaged with the worm 12 arranged on the moving rod 9, the helical teeth are engaged with the tooth grooves of the rotating wheel 15, so that the rotating wheel 15 is driven to rotate continuously, in order to ensure the stability and transmission accuracy of the engagement, a plurality of grooves are uniformly formed in the outer surface of the rotating wheel 15, the grooves not only play a guiding role in engagement, but also provide positioning points for subsequent deflection driving, the inner wall of the other end of the support table 13 is provided with the second connecting rod 16, the second connecting rod 16 is provided with the deflection arm 17, one end of the deflection arm 17 is provided with the contact head 18, the contact head 18 is in abutment with the surface groove of the rotating wheel 15, when the rotating wheel 15 rotates, the surface groove periodically pushes the contact head 18, so that the deflection arm 17 reciprocatingly deflects around the mounting point of the second connecting rod 16, so that the deflection arm 17 can realize regular and controllable deflection movement;

[0049] The other end of the deflection arm 17 is fixedly connected with the vibrating plate 19, so that the reciprocating movement of the deflection arm 17 is transmitted to the vibrating plate 19, so that the vibrating plate 19 periodically vibrates, a plurality of vibration heads 20 are uniformly distributed on one side of the vibrating plate 19, when the vibrating plate 19 vibrates, the vibration head 20 reciprocatingly moves linearly and continuously strikes the vibration isolation base 22 arranged on the surface of the upper mold 1 at a certain frequency, the vibration isolation base 22 serves as a transition component, converts the mechanical impact of the vibration head 20 into stable vibration force and transmits the vibration force to the upper mold 1, can buffer and disperse stress, avoids bad impact or damage to the mold body;

[0050] In addition, the return spring 21 is arranged between the vibrating plate 19 and the surface of the upper mold 1, one end of the return spring 21 is connected with the vibrating plate 19, and the other end of the return spring 21 is fixed on the surface of the upper mold 1, after the vibration head 20 completes one impact, the return spring 21 can provide a reverse elastic force, timely pulls the vibrating plate 19 back to the initial position, ensures the rhythm and stability of vibration, avoids too large amplitude or deviation caused by inertia, so as to realize automatic reset and cyclic work of the vibration system;

[0051] Through the above-mentioned mechanism synergy, the rotary motion of the worm 12 is converted into the rotary motion of the rotating wheel 15, and then converted into the reciprocating deflection of the vibrating plate 19 through the contact head 18 and the deflection arm 17, and finally the vibrating head 20 periodically strikes the vibration isolation base 22, realizes the low-frequency mechanical vibration of the mold, which can effectively promote the escape of gas in the molten aluminum during the casting process, avoid the formation of bubbles or shrinkage holes in the local area due to gas retention, and at the same time, the vibration action and the directional cooling of the cold iron form a linkage, which can improve the microstructure of the casting near the cold iron, so that the molten aluminum in this area is more dense and the grain distribution is more uniform. Therefore, not only the overall forming quality and dimensional accuracy of the super-high-voltage GIS aluminum alloy conductor are improved, but also the probability of internal defects is significantly reduced, thereby improving the mechanical properties and long-term operation reliability of the casting.

[0052] Further, in the above-mentioned scheme, the vibrating plate 19 can be replaced by a vibration source 23 according to the use requirement, and the vibration source 23 can be remotely controlled.

[0053] On the basis of the above-mentioned scheme, the vibrating plate 19 can be replaced by an independent vibration source 23 according to the use requirement; the vibration source 23 can be an electromagnetic vibrator, an eccentric motor vibrator or an ultrasonic transducer, etc., the parameters of which can be remotely adjusted by a PLC, and the vibration source 23 is directly installed on the outer surface of the support table 13 or the upper mold 1 through a fixing seat, and forms a vibration coupling with the original vibrating head 20 or the vibration isolation base 22; the control end of the vibration source 23 is connected with an external control system, and remote start-stop and parameter adjustment can be realized; the operator can flexibly set the working state of the vibration source 23, including the vibration frequency, the vibration amplitude and the action time, through the remote control module according to different stages of the casting process; for example, low amplitude and frequency vibration can be selected in the initial stage of the molten aluminum filling, to assist the gas to float and escape; strong amplitude vibration can be applied for a short time in the solidification shrinkage stage of the casting, to promote the feeding and grain refinement; the remote control mode not only improves the safety and convenience of the operation, but also avoids the direct contact of the personnel with the high-temperature mold environment.

[0054] When the vibration source 23 is started, the excitation mechanism inside the vibration source 23 directly generates a periodic excitation force, which is transmitted to the vibration isolation base 22 of the upper mold 1 through the mounting seat, and then makes the mold produce uniform and stable low-frequency or high-frequency vibration; the vibration action can form a synergistic effect with the directional cooling of the cold iron core 5: in the cold iron adjacent area, the vibration promotes the flow of the molten aluminum and the escape of the gas, and the cold iron accelerates the solidification, which can significantly improve the local microstructure and reduce common defects such as shrinkage holes and pores.

[0055] Meanwhile, since the vibration source 23 adopts an independently controllable structure, the installation position can be flexibly selected or the module can be replaced according to the shape and wall thickness of different castings, so as to realize targeted vibration control; compared with the traditional mode of indirectly transmitting vibration by driving the rotating wheel 15 through the worm 12, the scheme not only improves the vibration intensity and controllability, but also has higher working reliability and service life, and is suitable for production lines with higher automation.

[0056] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely divergences, modifications, replacements and variations of the embodiments, and the scope of the application is defined by the appended claims and their equivalents.

Claims

1. A low pressure casting forming device for ultra extra high voltage GIS aluminum alloy conductor, comprising an upper mold (1) and a lower mold (2), characterized in that: The upper mold (1) and the lower mold (2) are matched, a cavity is arranged between the upper mold (1) and the lower mold (2), the lower mold (2) is provided with a pouring port (3) on one side, a plurality of support tables (13) are arranged on the upper mold (1), the support tables (13) are arranged according to the shape of the super-high-voltage GIS aluminum alloy conductor, the support tables (13) are located in the key areas of the casting, such as the connecting parts of the casting and the areas with special shapes, and the support tables (13) are provided with adjusting assemblies; a coating assembly is arranged between the upper mold (1) and the lower mold (2); The adjusting assembly is used for adjusting the local cooling effect according to the casting process; the adjusting assembly comprises a moving rod (9) arranged in the support table (13), a threaded section (10) is formed in the moving rod (9), the threaded section (10) is sleeved with the support table (13) in a threaded mode, one end of the moving rod (9) is provided with a rotating disc (11), a worm (12) is arranged on the moving rod (9), the other end of the moving rod (9) is provided with a chill core block (5), the chill core block (5) is a solid chill, the upper mold (1) is provided with a cooling cavity (4), one end of the cooling cavity (4) extends into the upper mold (1), and the chill core block (5) is slidably arranged in the cooling cavity (4); a first connecting rod (14) is arranged on the inner wall of the support table (13), a rotating wheel (15) is arranged on the first connecting rod (14), a plurality of grooves are formed in the surface of the rotating wheel (15), and the rotating wheel (15) is engaged with the worm (12); a second connecting rod (16) is arranged on the inner wall of one end of the support table (13), a deflection arm (17) is arranged on the second connecting rod (16), one end of the deflection arm (17) is provided with a contact head (18), the contact head (18) can be in contact with the grooves in the surface of the rotating wheel (15), the other end of the deflection arm (17) is provided with a vibrating plate (19), a plurality of vibrating heads (20) are arranged on one side of the vibrating plate (19), a vibration isolation base (22) is arranged on the surface of the upper mold (1), the vibrating heads (20) can be in contact with the surface of the vibration isolation base (22), a reset spring (21) is arranged on one side of the vibrating plate (19), and the other end of the reset spring (21) is arranged on the surface of the upper mold (1); the coating assembly is used for coating the surface of the lower mold (2).

2. The low pressure casting forming device for the ultra-high voltage GIS aluminum alloy conductor according to claim 1, characterized in that: The coating assembly comprises a set of moving seats (24) arranged on the lower mold (2), the moving seats (24) are located on both sides of the lower mold (2), the moving seats (24) are not in contact with the cavity between the upper mold (1) and the lower mold (2), a sliding seat (28) is slidably arranged in the moving seat (24), a first connecting arm (25) is arranged on the sliding seat (28), a support rod (27) is arranged at the center of the first connecting arm (25), a second connecting arm (26) is arranged on the support rod (27), one end of the second connecting arm (26) is arranged in the upper mold (1), the other end of the second connecting arm (26) is arranged on the lower mold (2), an installation cylinder (29) is arranged on one side of the first connecting arm (25), a rotating rod (31) is arranged in the installation cylinder (29), an installation table (33) is arranged at one end of the rotating rod (31), a guide rod (34) is arranged on one side of the installation table (33), the guide rod (34) is a telescopic structure, an installation plate (36) is arranged at one end of the guide rod (34), the installation plate (36) is arranged in a T shape, a limiting spring (35) is sleeved on the guide rod (34), one end of the limiting spring (35) is arranged on one side of the installation table (33), the other end of the limiting spring (35) is arranged on one side of the installation plate (36), a coating roller (37) is arranged on the installation plate (36), a plurality of friction grooves (38) are formed in the surface of the coating roller (37), and the coating roller (37) can be in contact with the surface of the lower mold (2).

3. The low pressure casting forming device for the ultra-high voltage GIS aluminum alloy conductor according to claim 1, characterized in that: The cooling cavity (4) is in V shape and other shapes, and the shape of the cold iron core block (5) is matched with the cooling cavity (4), and a plurality of diffusion grooves (6) are formed in the surface of the cold iron core block (5).

4. The low pressure casting forming device for the ultra-extra high voltage GIS aluminum alloy conductor according to claim 1, characterized in that: A connecting cylinder (7) is arranged at the top of the cold iron core block (5), the connecting cylinder (7) is hollow, a limiting plate (8) is arranged at the top of the connecting cylinder (7), one end of the moving rod (9) extends into the connecting cylinder (7), and a limiting disc is arranged at one end of the moving rod (9) and can be in contact with the limiting plate (8).

5. The low pressure casting forming device for the ultra-extra high voltage GIS aluminum alloy conductor according to claim 4, characterized in that: The vibrating plate (19) can be replaced by a vibration source (23) according to the use requirement, and the vibration source (23) can be remotely controlled.

6. The low pressure casting forming device for the ultra-extra high voltage GIS aluminum alloy conductor according to claim 2, characterized in that: A limiting groove (30) is formed in one side of the installation cylinder (29), and a limiting block (32) is arranged on the rotating rod (31) and can be in contact with both sides of the limiting groove (30).

7. The low pressure casting forming device for the ultra-extra high voltage GIS aluminum alloy conductor according to claim 6, characterized in that: The coating roller (37) can be replaced by different types according to different use scenarios.

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