Melt purification device and casting system

Abstract

The utility model belongs to the technical field of casting, and particularly relates to a melt purification device and a casting system, the melt purification device comprises a launder for melt flow, a filter screen and a melt liquid level detector, the filter screen is vertically arranged in the launder, and the melt liquid level detector is used for detecting the melt liquid level height between one end of an inlet of the launder and the position of the filter screen. An emergency discharge opening is formed in the side face of the launder, an emergency discharge opening is formed in the side face of the area, located between one end of an inlet of the launder and the position where the filter screen is located, of the emergency discharge opening, and a valve is arranged on the emergency discharge opening and can serve as part of the launder structure in an original casting system; the effect of further filtering and purifying the melt is achieved on the basis of an original casting system, the purity of the melt is improved, the production requirement of castings with higher quality requirements is met, the whole device can be directly modified and additionally installed on a launder in the original casting system, the whole structure is simpler, and the cost is lower. The additional cost is lower, and the maintenance is more convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of melting and casting, and specifically relates to a melt purification device and a melting and casting system. Background Art

[0002] At present, in conventional melting and casting production lines, degassing boxes and filtering equipment are set up in sequence. The melt (molten metal) is degassed by the degassing box, and then the melt is removed by the filtering equipment, so that the quality of the castings meets the general market demand, such as the melting and casting system provided by the utility model with announcement number CN210587049U. However, with the increasing market demand for castings, the quality requirements for castings in some fields are also constantly increasing, especially in high-end fields such as aerospace, marine engineering and military industry, which have very strict quality requirements for castings. For the melting and casting of such high-quality castings, the purification requirements for the melt will also increase accordingly, and the purification effect of conventional melting and casting production lines is limited. If additional purification equipment is added to the production line, although the purification effect of the melt can be improved, the production line cost will increase significantly due to the increased investment in equipment, and maintenance will also be more troublesome. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a melt purification device and a melting and casting system which have a simpler overall structure, lower additional cost and more convenient maintenance.

[0004] The utility model provides a melt purification device, including a flow channel for melt flow, and also includes a filter screen and a melt level detector, the filter screen is vertically arranged inside the flow channel, the melt level detector is used to detect the melt level height between one end of the flow channel inlet and the position of the filter screen, and an emergency discharge port is arranged on the side of the flow channel, the emergency discharge port is located between one end of the flow channel inlet and the position of the filter screen. The emergency discharge port is arranged on the side of the area between one end of the flow channel inlet and the position of the filter screen, and a valve is arranged on the emergency discharge port.

[0005] Furthermore, a slot is provided on the side wall and / or the bottom of the flow channel, and the filter screen is plugged into and matched with the slot to be vertically arranged inside the flow channel.

[0006] Furthermore, a fixing plate is provided on the top of the filter screen, and two ends of the fixing plate are correspondingly overlapped on both sides of the top of the flow channel, and are fixed to both sides of the top of the flow channel by fasteners.

[0007] Furthermore, the fastener is a latch, and both ends of the fixing plate are provided with insertion holes for the latch to pass through, and both sides of the top of the flow channel are provided with positioning holes for the ends of the latch to be inserted.

[0008] Furthermore, a handle is provided on the top of the filter.

[0009] Furthermore, the melt level detector is a non-contact detector, which is arranged above the flow channel.

[0010] Furthermore, the top of the flow channel is open.

[0011] Furthermore, the top of the flow channel is closed by a cover plate, and the cover plate is provided with an opening for the filter screen to pass through and a window for the melt level detector to detect.

[0012] Furthermore, the emergency discharge port is connected to a discharge channel.

[0013] The utility model also provides a melting and casting system, comprising the melt purification device as described above, wherein the melt purification device is arranged before the degassing box in the melting and casting system.

[0014] The beneficial effect of the utility model is that, by using the flow trough as a carrier, when the melt flows into the flow trough, the flowing melt is filtered and impurities are removed by the filter screen, and the melt level inside the flow trough located upstream of the filter screen is monitored by the melt level detector. When applied to the existing melting and casting system, it can directly serve as part of the flow trough structure in the original melting and casting system, and further filter and purify the melt on the basis of the original melting and casting system, improve the purity of the melt, and meet the production needs of castings with higher quality requirements. And the device as a whole can be directly modified and installed on the flow trough in the original melting and casting system, the overall structure is simpler, the cost of adding is lower and the maintenance is more convenient, and it can be set at different positions of the melting and casting system according to needs, such as being set in the flow trough area before the degassing box to play a purification role before degassing, or being set in the flow trough area before or after the original filtering equipment, and combined with the original filtering equipment to play a purification effect of secondary filtration.

[0015] When the melt level inside the flow channel upstream of the filter is higher than the safety level because the melt inflow in front of the filter is greater than the melt outflow behind the filter, the valve opens and some unfiltered melt flows out from the emergency discharge port, avoiding the melt inside the flow channel from overflowing along the top of the flow channel and causing a safety accident, thereby ensuring the reliability and safety of the device when used in the melting and casting system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a top view of the melt purification device of the utility model.

[0017] Figure 2 This is the front view of the melt purification device of the utility model.

[0018] In the figure: 1. flow channel; 11. external steel structure; 12. thermal insulation layer; 13. refractory layer; 14. fixed pressure plate; 15. slot; 2. filter screen; 21. fixed plate; 22. handle; 3. melt level detector; 4. emergency discharge port; 5. discharge channel; 6. fasteners. DETAILED DESCRIPTION

[0019] like Figure 1 and Figure 2 As shown, the utility model provides a melt purification device, which includes a flow channel 1 for supplying melt flow in a melting and casting production line / system, that is, the flow channel 1 is a channel structure for supplying melt flow in the melting and casting system, and the melt purification device also includes a filter screen 2 and a melt level detector 3, the flow channel 1 includes an inlet end and an outlet end, and the filter screen 2 is vertically arranged inside the flow channel 1. After the melt flows into the flow channel 1 along the inlet end of the flow channel 1, it is filtered and impurities are removed under the action of the filter screen 2 inside the flow channel 1, and the filtered melt flows out from the outlet end of the flow channel 1. The melt purification device also includes a melt level detector 3, which is used to detect the melt level height inside the flow channel 1 between one end of the flow channel 1 entrance and the position of the filter 2, and an emergency discharge port 4 is arranged on the side of the flow channel 1. The emergency discharge port 4 is specifically located on the side of the area between one end of the flow channel 1 entrance and the position of the filter 2 inside the flow channel 1. A valve is arranged on the emergency discharge port 4, and the valve and the melt level detector 3 are electrically connected to the external controller.

[0020] The melt purification device provided by the utility model directly adopts the flow channel 1 for the flow of the melt in the melting and casting system as a carrier. When the melt flows into the flow channel 1 along the upstream equipment, the flowing melt is filtered and impurities are removed by the filter screen 2, and the melt level detector 3 is used to monitor the melt level inside the flow channel 1 located upstream of the filter screen 2. When applied to the existing melting and casting system, it can directly serve as a part of the flow channel 1 structure in the original melting and casting system, and further achieve the effect of filtering and purifying the melt on the basis of the original melting and casting system, thereby improving the purity of the melt and meeting the production needs of castings with higher quality requirements. Moreover, the device as a whole can be directly modified and installed on the flow channel 1 in the original melting and casting system. The overall structure is simpler, the cost of adding it is lower, and the maintenance is more convenient. It can be set at different positions of the melting and casting system according to needs, for example, it can be set in the flow channel area before the degassing box to play a purification role before degassing, or it can be set in the flow channel area before or after the original filtering equipment to achieve a secondary filtration purification effect in combination with the original filtering equipment. When the melt level inside the flow channel 1 upstream of the filter 2 is higher than the safe level because the melt inflow in front of the filter 2 is greater than the melt outflow behind the filter 2, the valve opens and some unfiltered melt flows out from the emergency discharge port 4, avoiding the melt inside the flow channel 1 from overflowing along the top of the flow channel 1 and causing a safety accident, thereby ensuring the reliability and safety of the device when used in a melting and casting system.

[0021] A card slot 15 is provided on the side wall and / or the bottom inside the flow trough 1, and the filter screen 2 is plugged into the card slot 15 to be vertically arranged inside the flow trough 1. This arrangement can facilitate the disassembly and assembly of the filter screen 2, and is convenient for maintenance personnel to regularly clean or replace the filter screen 2, thereby ensuring the effectiveness of subsequent filtration. The filter screen 2 can be made of alkali-free glass fiber yarn or stacked porous ceramic filter plates, which can be determined according to actual needs. The arrangement of the card slot 15 can be directly formed in the concave side wall and / or bottom inside the flow trough 1. The width dimension of the card slot 15 matches the thickness dimension of the filter screen 2, and the depth dimension of the card slot 15 is 2-5mm, which can be determined according to actual needs.

[0022] A fixing plate 21 is provided on the top of the filter screen 2. When the filter screen 2 is inserted into the card slot 15, the two ends of the fixing plate 21 overlap the two sides of the top of the flow channel 1 and are fixed to the two sides of the top of the flow channel 1 by fasteners 6. This is used to further improve the stability of the filter screen 2 after installation and prevent the filter screen 2 from being offset by the melt and affecting the filtering effect.

[0023] The fastener 6 is a latch, and both ends of the fixing plate 21 are provided with insertion holes for the latch to pass through, and both sides of the top of the flow channel 1 are provided with positioning holes for the ends of the latch to be inserted. When the filter screen 2 is inserted into the card slot 15, the two ends of the fixing plate 21 are correspondingly overlapped on both sides of the top of the flow channel 1. By inserting the latch into the corresponding insertion holes and then into the positioning holes, the two ends of the fixing plate 21 can be limited and fixed, and the position of the filter screen 2 will not be offset by the melt scouring. When the filter screen 2 needs to be removed, the latch can be pulled out. This setting method is reliable in limiting and is simple and convenient to set up.

[0024] In the present invention, a handle 22 is provided on the top of the filter screen 2 for the operator to hold so as to facilitate moving and pulling out the filter screen 2 as a whole.

[0025] In the present invention, due to the high temperature of the melt, the melt level detector 3 is preferably a non-contact detector, which can be a liquid level radar or other liquid level detectors that can be used in a high temperature environment. The melt level detector 3 is specifically arranged above the area between one end of the inlet of the flow channel 1 and the position of the filter screen 2 inside the flow channel 1 through a bracket, and detects the liquid level height of the melt downward.

[0026] In one configuration of the present invention, the top of the flow channel 1 is open, that is, the top of the flow channel 1 is not closed. In this configuration, the filter screen 2 can be directly inserted and pulled out from the top of the flow channel 1, and the melt level detector 3 can directly detect the melt level height through the top of the flow channel 1 downward.

[0027] In another setting of the utility model, the top of the flow channel 1 is closed by a cover plate, and the cover plate is provided with an opening for the filter screen 2 to pass through as a whole and a window for the melt level detector 3 to detect. The filter screen 2 is installed and removed through the opening, and the melt level detector 3 detects the melt level height downward through the window.

[0028] Among them, Figure 2 As shown, the structure of the flow channel 1 specifically includes an external steel structure 11, a heat insulation layer 12 arranged on the external steel structure 11, a refractory layer 13 arranged inside the heat insulation layer 12, and a fixed pressing plate 14 located at the top, the inside of the flow channel is specifically the inside of the refractory layer 13, and the card slot 15 is specifically arranged on the refractory layer 13. Based on this arrangement, it is ensured that the flow channel 1 has sufficient temperature resistance to meet the flow and transportation of the melt, and at the same time, it is ensured that the flow channel 1 as a whole has good structural strength.

[0029] The emergency discharge port 4 is connected to a discharge channel 5, which is used for connecting with a melt reflux channel to return the discharged melt to an upstream device of the flow channel 1, such as a holding furnace.

[0030] The utility model also provides a melting and casting system. Different from the conventional melting and casting system, the melting and casting system includes the melt purification device as described above, and the melt purification device is arranged before the degassing box in the melting and casting system. By arranging the melt purification device before the degassing box, impurities in the melt when entering the degassing box can be reduced, which is conducive to improving the effective contact of inert micro-bubbles during the degassing process, thereby improving the degassing effect, improving the melt purification effect, and thus improving the quality of the final casting. At the same time, the amount of slag in the degassing box is less, which is more convenient to clean.

[0031] A person skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of protection of the present application is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of different aspects of one or more embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0032] One or more embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the present application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of the present application should be included in the protection scope of the present application.

Claims

1. A melt purification device, characterized in that: The invention comprises a flow channel (1) for allowing melt to flow, a filter screen (2) and a melt level detector (3), wherein a slot (15) is arranged on the side wall and / or the bottom of the flow channel (1), the filter screen (2) and the slot (15) are plugged and matched to be arranged vertically inside the flow channel (1), a fixing plate (21) is arranged on the top of the filter screen (2), the two ends of the fixing plate (21) are correspondingly overlapped on the two sides of the top of the flow channel (1), and are fixed to the two sides of the top of the flow channel (1) by fasteners (6), the melt level detector (3) is used to detect the melt level height between one end of the flow channel (1) inlet and the position of the filter screen (2), and an emergency discharge port (4) is arranged on the side of the flow channel (1), the emergency discharge port (4) is located in the area between one end of the flow channel (1) inlet and the position of the filter screen (2), and a valve is arranged on the emergency discharge port (4).

2. The melt purification device according to claim 1, characterized in that: The fastener (6) is a latch, and insertion holes for the latch to pass through are provided at both ends of the fixing plate (21), and positioning holes for the ends of the latch to be inserted are provided at both sides of the top of the flow channel (1).

3. The melt purification device according to claim 1 or 2, characterized in that: A handle (22) is provided on the top of the filter screen (2).

4. The melt purification device according to claim 1 or 2, characterized in that: The melt level detector (3) is a non-contact detector, which is arranged above the flow channel (1).

5. The melt purification device according to claim 4, characterized in that: The top of the flow channel (1) is open.

6. The melt purification device according to claim 4, characterized in that: The top of the flow channel (1) is closed by a cover plate, and the cover plate is provided with an opening for the filter screen (2) to pass through and a window for the melt level detector (3) to detect.

7. The melt purification device according to any one of claims 1, 2, 5 and 6, characterized in that: The emergency discharge port (4) is connected to a discharge channel (5).

8. A melting and casting system, characterized in that: It comprises the melt purification device as described in any one of claims 1 to 7, wherein the melt purification device is arranged before the degassing box in the melting and casting system.

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