Structure for improving internal casting quality of cavity
By designing the structure of the bent pipe and lining assembly at the corner of the diaphragm pump cavity, the problem of crack defects in the tensioning part of the cavity corner is solved, the casting quality and cost reduction are achieved, and the operating quality of the pump is improved.
Patent Information
- Application Number
- CN202421166573.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-27
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-05-27
AI Technical Summary
There are crack defects in the corner tensioning part of the three-cylinder single-acting diaphragm pump cavity, resulting in oil leakage. The existing casting process cannot effectively eliminate the defects, increasing weight and manufacturing costs.
Design a structure that includes a bent pipe and a liner assembly. The bent pipe is equipped with a round boss and a square boss at the corner, and reinforces the ribs and thicken parts. After the casting solidifies, the liner assembly is cut off to form a liner passage to avoid cracks. produce.
Improve the quality of castings, reduce weight and processing costs, avoid crack defects, and improve the operating quality of the diaphragm pump.
Smart Images
Figure CN222175873U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of three-cylinder single-acting diaphragm pumps, and in particular relates to a structure for improving the casting quality inside a cavity. Background Art
[0002] During the operation of the diaphragm pump, there was a crack defect in the corner reinforcement of the cavity, which caused oil leakage. At that time, it was believed that the casting structure could not achieve full shrinkage compensation, and the turning part was not dense, which reduced the strength and caused the cracks. From the finite element stress analysis diagram, it can be seen that the crack-generating part is not the part with the greatest stress, and the safety factor of this part is relatively large. It can be judged that if there is no casting defect, this part should not have cracks.
[0003] From the results of casting process simulation analysis, it can be seen that shrinkage defects do exist in the corner reinforcement area of the cavity.
[0004] Due to structural limitations, the casting process has no effective measures to eliminate defects. Therefore, the left and right cavities of multiple high-pressure pumps are designed as an upper and lower circular structure. This structure can achieve full shrinkage compensation, but the disadvantage is that the weight is increased by about 40%, and the inner cavity is more prone to sand adhesion. In order to solve the sand cleaning problem, sand cleaning holes are added at the turning parts of the left and right cavities, and sealing devices are added, which ultimately increases the manufacturing cost.
[0005] Therefore, there is an urgent need for a structure with simple structure and low cost to solve the problem of oil leakage caused by crack defects in the corner tie rod part of the three-cylinder single-acting diaphragm pump cavity. Utility Model Content
[0006] The purpose of the utility model is to provide a structure for improving the casting quality inside a cavity.
[0007] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions.
[0008] A structure for improving the casting quality inside a cavity, comprising a bent pipe, characterized in that: a first flange is provided at one end of the bent pipe, and a second flange is provided at the other end of the bent pipe; a first lining assembly is provided on the first flange, and a second lining assembly is provided on the second flange; the bent pipe has two bends, and a round boss is provided at the bend close to the first flange; a square boss is provided at the bend close to the second flange, and a third lining assembly is provided on the square boss; a reinforcing rib is provided at the bend close to the second flange; a thickened portion is provided at the connection between the reinforcing rib and the bent pipe close to the second flange; a fourth lining assembly is provided between the thickened portion and the second flange.
[0009] Furthermore, the outer diameter of the connection between the elbow and the first flange gradually increases to be the same as the outer edge of the first flange.
[0010] Furthermore, the first repair lining assembly, the second repair lining assembly, the third repair lining assembly and the fourth repair lining assembly should be removed after the casting is solidified and the sand is removed.
[0011] Further, the first lining assembly includes a first lining main block, and a first lining auxiliary block is arranged corresponding to the center hole of the first flange separated from the first lining main block; the second lining assembly includes a second lining main block, and a second lining auxiliary block is arranged corresponding to the center hole of the second flange separated from the second lining main block, and the second lining main block is provided with a missing corner matching with the second flange, one side of the missing corner is arranged to fit with the outer plane of the second flange, and the second side of the missing corner is arranged to fit tangently with the circular outer ring of the second flange.
[0012] The beneficial effects of the utility model.
[0013] The utility model can improve the quality of castings, effectively avoid the generation of crack defects, and improve the running quality of diaphragm pumps; reduce the weight of castings by about 40%, and reduce the procurement cost of castings; there is no need to process sand cleaning holes and related sealing parts, reduce the amount of external surface processing, and ultimately reduce the processing cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a structural diagram of a finished product of the utility model.
[0015] Figure 2 It is a schematic diagram of the lining of the utility model.
[0016] Figure 3 This is a schematic diagram of the second angle lining of the utility model.
[0017] Explanation of serial numbers in the figure: 1-bend pipe, 2-first flange, 3-second flange, 4-first lining assembly, 41-first lining main block, 42-first lining auxiliary block, 5-second lining assembly, 51-second lining main block, 52-second lining auxiliary block, 6-round boss, 7-square boss, 8-third lining assembly, 9-reinforcement rib, 10-thickening part, 11-fourth lining assembly. DETAILED DESCRIPTION
[0018] like Figure 1-3The utility model includes a bent pipe 1, characterized in that: a first flange 2 is provided at one end of the bent pipe 1, and a second flange 3 is provided at the other end of the bent pipe; a first lining component 4 is provided on the first flange 2, and a second lining component 5 is provided on the second flange 3; the bent pipe 1 has two bends, and a round boss 6 is provided at the bend close to the first flange 2; a square boss 7 is provided at the bend close to the second flange 3, and a third lining component 8 is provided on the square boss; a reinforcing rib 9 is provided at the bend close to the second flange 3; a thickened portion 10 is provided at the connection between the reinforcing rib 9 and the bent pipe 1 close to the second flange 3; a fourth lining component 11 is provided between the thickened portion 10 and the second flange 3.
[0019] Furthermore, the outer diameter of the connection between the elbow 1 and the first flange 2 gradually increases to be the same as the outer edge of the first flange 2 .
[0020] Furthermore, the first lining component 4, the second lining component 5, the third lining component 8 and the fourth lining component 11 should be removed after the casting is solidified and the sand is removed.
[0021] Furthermore, the first lining component 4 includes a first lining main block 41, and a first lining auxiliary block 42 is arranged corresponding to the center hole of the first flange 2 separated from the first lining main block 41; the second lining component 5 includes a second lining main block 51, and a second lining auxiliary block 52 is arranged corresponding to the center hole of the second flange 3 separated from the second lining main block 51, and the second lining main block 51 is provided with a missing corner matching the second flange 3, one side of the missing corner is arranged to fit the outer plane of the second flange 3, and the second side of the missing corner is arranged to fit tangent to the circular outer ring of the second flange 3.
[0022] The utility model locally thickens the corner reinforcement part of the cavity, and adds a lining as a shrinkage compensation channel, which plays a role as a channel for shrinkage compensation of molten steel when the casting solidifies. After the casting solidifies and sand is removed, the shrinkage compensation channel is cut off.
[0023] It can be understood that the above specific description of the utility model is only used to illustrate the utility model and is not limited to the technical solution described in the implementation mode of the utility model. Ordinary technicians in the field should understand that the utility model can still be modified or replaced by equivalents to achieve the same technical effect; as long as the use requirements are met, they are within the protection scope of the utility model.
Claims
1. A structure for improving the casting quality inside a cavity, comprising a bent pipe (1), characterized in that: A first flange (2) is provided at one end of the bent pipe (1), and a second flange (3) is provided at the other end of the bent pipe; a first lining assembly (4) is provided on the first flange (2), and a second lining assembly (5) is provided on the second flange (3); the bent pipe (1) has two bends, and a round boss (6) is provided at the bend close to the first flange (2); a square boss (7) is provided at the bend close to the second flange (3), and a third lining assembly (8) is provided on the square boss; a reinforcing rib (9) is provided at the bend close to the second flange (3); a thickened portion (10) is provided at the connection between the reinforcing rib (9) and the bent pipe (1) close to the second flange (3); and a fourth lining assembly (11) is provided between the thickened portion (10) and the second flange (3).
2. A structure for improving the casting quality inside a cavity according to claim 1, characterized in that: The outer diameter of the connection between the elbow (1) and the first flange (2) gradually increases until it becomes as thick as the outer edge of the first flange (2).
3. A structure for improving the casting quality inside a cavity according to claim 1, characterized in that: The first lining component (4), the second lining component (5), the third lining component (8) and the fourth lining component (11) should be removed after the casting is solidified and the sand is removed.
4. The structure for improving the casting quality inside the cavity according to claim 1, characterized in that: The first lining assembly (4) comprises a first lining main block (41), and a first lining auxiliary block (42) is arranged at a distance from the first lining main block (41) and corresponding to the center hole of the first flange (2); the second lining assembly (5) comprises a second lining main block (51), and a second lining auxiliary block (52) is arranged at a distance from the second lining main block (51) and corresponding to the center hole of the second flange (3), the second lining main block (51) is provided with a missing corner that matches the second flange (3), one side of the missing corner is arranged to fit with the outer plane of the second flange (3), and the second side of the missing corner is arranged to fit tangent to the circular outer ring of the second flange (3).