Eccentric overflow riser
By designing eccentric overflow leaks, the problem of existing overflow leaks interfering with each other when used in multiple combinations is solved, achieving more efficient molten iron bearing and simpler operating procedures.
Patent Information
- Application Number
- CN202421624897.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-10
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-07-10
AI Technical Summary
The existing overflow leaks are prone to interfere with each other when used in combination and are easily pushed up by molten iron, resulting in failure of use, complex design, high cost, and small molten iron bearing capacity.
An eccentric overflow riser is designed, with the height of the riser cup higher than the outer jacket. The entrance to the bottom end of the through hole adopts a multiple conical hole connection design. The jacket and the riser cup are connected through the bottom plate to form an open overflow collection groove and can be rotated along the center line to avoid interference.
The flexible layout of overflow risers is realized, mutual interference is avoided, the iron bearing capacity is increased, the design and operation are simplified, and the cost is reduced.
Smart Images
Figure CN222817900U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of metal casting production, and specifically relates to an eccentric overflow riser. Background Art
[0002] Under the current casting production technology background, in order to reduce production costs and improve market competitiveness in production, the most effective way is to significantly reduce the use height of the sand box. In the casting production process of general cast iron castings, it is necessary to add overflow risers (i.e. sand risers) on the sand mold surface of the cavity to be poured with molten iron, which is used to increase the riser height and molten iron storage capacity of the cavity upper mold, realize shrinkage compensation castings, and improve the effective use performance of the risers, thereby effectively ensuring the quality of castings. At the same time, it also reduces the amount of molten iron overflowing to the sand mold surface of the upper mold during the pouring process, so as to reduce the difficulty of subsequent sand box opening.
[0003] Traditional overflow riser Figure 1 and Figure 2 As shown, its structure includes a riser cup 1 and a jacket 2. The riser cup 1 is concentrically connected and arranged on the inner side of the jacket 2. The height of the riser cup 1 is lower than that of the jacket 2. An annular overflow collecting tank 3 is arranged between the riser cup 1 and the jacket 2. A through hole 11 which is connected up and down is arranged on the inner side of the riser cup 1. The bottom entrance of the through hole 11 is a tapered hole 12 which is small at the top and large at the bottom. When in use, the molten iron overflowing from the riser on the sand mold surface of the upper mold rises, enters the through hole 11 through the tapered hole 12, and utilizes the height difference between the riser cup 1 and the jacket 2 to turn over the riser cup 1 and overflow into the overflow collecting tank 3. This traditional overflow riser mainly has the following problems: 1) The riser cup is concentrically arranged with the outer sleeve. When multiple overflow risers are used in combination, since the positions of the riser cup and the outer sleeve of each overflow riser are relatively fixed, the outer sleeves of different overflow risers will interfere with each other, and may not be used when used in a restricted position, which has limitations; 2) The bottom entrance of the through hole is a tapered hole that is small at the top and large at the bottom. During the process of molten iron entering the through hole through the tapered hole and rising, the overflow riser is easily lifted up due to the buoyancy of the molten iron, resulting in failure of the overflow riser; 3) Due to the height difference between the riser cup and the outer sleeve, when the molten iron fills the overflow collection tank, the molten iron in the overflow collection tank and the through hole will be connected to the casting as a whole, making it difficult to unpack the casting and increasing the cumbersome handling and operation procedures; 4) The design and production are relatively complex, the production cost is high, the overall volume and weight are heavy, and the molten iron carrying capacity is small. Utility Model Content
[0004] The technical problem to be solved by the utility model is to provide an eccentric overflow riser which is simple to operate, convenient, flexible and efficient in view of the deficiencies in the prior art.
[0005] The technical solution adopted by the utility model to solve the above technical problems is: an eccentric overflow riser, including an eccentrically arranged riser cup and a jacket, the height of the riser cup is higher than the jacket, the inner side of the riser cup is provided with a through hole connected up and down, the bottom of the outer wall of the riser cup is connected to the bottom of the inner wall of the jacket via a bottom plate, and the outer wall of the riser cup, the bottom plate and the inner wall of the jacket form an overflow collecting trough with an open top.
[0006] The riser cup and the outer sleeve of the eccentric overflow riser of the utility model are eccentrically arranged. During use, after the eccentric overflow riser is placed on the upper mold sand mold surface of the cavity to be poured with molten iron, the eccentric overflow riser can be rotated along the center line of the riser cup, so as to effectively utilize the surrounding space for layout and placement, and when multiple eccentric overflow risers are used in combination, the position of the outer sleeves of each eccentric overflow riser can be rotated along the center line of the riser cup to adjust, so as to effectively avoid mutual interference between the outer sleeves, and the use is convenient and flexible, meeting the use requirements of different spaces. In addition, the height of the riser cup is higher than the outer sleeve, which can effectively avoid the situation where the molten iron in the overflow collection tank is connected with the molten iron in the through hole and the casting. Compared with the traditional overflow riser, under the same volume of the overflow riser, the volume of the overflow collection tank can be increased, and the carrying capacity of the molten iron can be improved, or, under the same volume of the overflow collection tank, the volume of the overflow riser can be reduced.
[0007] In the casting production process of general small and medium-sized castings, one eccentric overflow riser of the utility model can meet the requirements. For large and extra-large castings, the number of eccentric overflow risers can be increased according to actual needs.
[0008] Preferably, one side wall of the riser cup overlaps with one side wall of the outer sleeve, thereby further increasing the volume of the overflow collecting tank or reducing the volume of the overflow riser.
[0009] Furthermore, a notch is provided on the top of the riser cup, the height of the notch is between the height of the riser cup and the height of the outer sleeve, and the notch is adjacent to the overflow collecting tank. The notch plays a further role in drainage and guiding, preventing flow interruption, and can also play a role in isolating molten iron, preventing the molten iron in the overflow collecting tank from solidifying with the molten iron in the through hole.
[0010] Preferably, the through hole is a cone with a larger top and a smaller bottom, and the bottom entrance of the through hole is concentrically provided with a plurality of conical holes, and the plurality of conical holes are connected in a circular arc transition from bottom to top in sequence, and the apertures are successively reduced. The bottom entrance of the through hole adopts the design of the plurality of concentrically arranged conical holes, which has a buffering effect, can effectively avoid the overflow riser being lifted up due to the buoyancy of the molten iron, ensure the use effect, and after the pouring is completed, the sand box cleaning operation is convenient.
[0011] Preferably, a lug is integrally provided on the top of the outer wall of the outer sleeve to facilitate operators to carry and use it.
[0012] Compared with the prior art, the utility model has the following advantages: the eccentric overflow riser of the utility model is simple, convenient, flexible and efficient to operate, and can effectively solve the problems of limited space and mutual interference of overflow risers caused by factors such as the large number of risers on the cavity mold or the concentrated position of the risers, and solve the problem of connection between the molten iron in the overflow collecting trough and the molten iron and casting in the through hole, effectively improving the operational convenience and production efficiency during use, and at the same time helping to increase the volume of the overflow collecting trough or reduce the volume of the overflow riser. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a schematic diagram of the appearance of a traditional overflow riser;
[0014] Figure 2 It is a schematic diagram of the longitudinal section of the structure of a traditional overflow riser;
[0015] Figure 3 Schematic diagram of the appearance of an eccentric overflow riser in an embodiment;
[0016] Figure 4 A top view of an eccentric overflow riser in an embodiment;
[0017] Figure 5 for Figure 4 Middle AA section view;
[0018] Figure 6 for Figure 5 Enlarged view of point B in the middle;
[0019] The specific reference numerals in the figure are as follows:
[0020] 1-riser cup, 11-through hole, 12-cone hole, 13-notch, 2-jacket, 21-lug, 3-overflow collecting groove, 4-bottom plate. DETAILED DESCRIPTION
[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0022] The eccentric overflow riser of the embodiment, such as Figure 3 to Figure 6 As shown, it includes an eccentrically arranged riser cup 1 and a jacket 2, the top of the outer wall of the jacket 2 is integrally provided with a lug 21, the height of the riser cup 1 is higher than the jacket 2, the inner side of the riser cup 1 is provided with a through hole 11 which is connected up and down, the bottom of the outer wall of the riser cup 1 is connected to the bottom of the inner wall of the jacket 2 via a bottom plate 4, and the outer wall of the riser cup 1, the bottom plate 4 and the inner wall of the jacket 2 form an overflow collecting tank 3 which is open at the top.
[0023] In this embodiment, one side wall of the riser cup 1 overlaps with one side wall of the outer sleeve 2 , and a notch 13 is provided on the top of the riser cup 1 . The height of the notch 13 is between the height of the riser cup 1 and the outer sleeve 2 , and the notch 13 is adjacent to the overflow collecting tank 3 .
[0024] In this embodiment, the through hole 11 is a cone that is larger at the top and smaller at the bottom. A plurality of tapered holes 12 are concentrically arranged at the bottom entrance of the through hole 11. The plurality of tapered holes 12 are connected in arc transitions from bottom to top in sequence, and the apertures decrease in sequence.
[0025] During use, after the eccentric overflow riser is placed on the upper mold sand mold surface of the cavity where the molten iron is to be poured, the eccentric overflow riser can be rotated along the center line of the riser cup 1, so as to effectively utilize the surrounding space for layout and placement, and when multiple eccentric overflow risers are used in combination, the position of the outer sleeve 2 of each eccentric overflow riser can be rotated along the center line of the riser cup 1 to adjust the position, so as to effectively avoid mutual interference between the outer sleeves 2, which is convenient and flexible to use and meets the use requirements of different spaces. After the casting is poured, the molten iron passes through the multiple tapered holes 12 upward into the through hole 11, and enters the overflow collection tank 3 through the notch 13 at the top of the riser cup 1, so as to ensure the quality of the casting.
[0026] Since the height of the riser cup 1 is higher than the outer sleeve 2, the connection between the molten iron in the overflow collecting trough 3 and the molten iron and the casting in the through hole 11 can be effectively avoided. Compared with the traditional overflow riser, when designing the eccentric overflow riser, the volume of the overflow collecting trough 3 can be increased and the carrying capacity of the molten iron can be improved under the same volume of the overflow riser, or, under the same volume of the overflow collecting trough 3, the volume of the overflow riser can be reduced.
[0027] In the casting production process of general small and medium-sized castings, one eccentric overflow riser can meet the requirements. For large and extra-large castings, the number of eccentric overflow risers can be increased according to actual needs.
Claims
1. An eccentric overflow riser, characterized in that: It includes an eccentrically arranged riser cup and a jacket, wherein the riser cup is higher than the jacket, a through hole communicating up and down is arranged on the inner side of the riser cup, the bottom of the outer wall of the riser cup is connected to the bottom of the inner wall of the jacket via a bottom plate, and the outer wall of the riser cup, the bottom plate and the inner wall of the jacket form an overflow collecting trough with an open top.
2. An eccentric overflow riser according to claim 1, characterized in that: One side wall of the riser cup overlaps with one side wall of the outer sleeve.
3. An eccentric overflow riser according to claim 2, characterized in that: A notch is arranged on the top of the riser cup, the height of the notch is between the height of the riser cup and the height of the outer sleeve, and the notch is adjacent to the overflow collecting tank.
4. The eccentric overflow riser according to claim 1, characterized in that: The through hole is a cone with a larger top and a smaller bottom. A plurality of conical holes are concentrically arranged at the bottom entrance of the through hole. The plurality of conical holes are connected in arc transition from bottom to top in sequence and the apertures are reduced in sequence.
5. The eccentric overflow riser according to claim 1, characterized in that: The top of the outer wall of the outer sleeve is integrally provided with a lug.