Differential pressure casting riser tube leak hunting device

Abstract

The utility model relates to the technical field of automobile part casting, and discloses a differential pressure casting riser tube leak hunting device which comprises a base, a guide pillar is connected to the base, a pressing cover plate used for clamping a riser tube to be detected is connected to the guide pillar in a sliding mode, and the pressing cover plate is connected to the guide pillar in a sliding mode. An upper sealing gasket is arranged on the pressing cover plate corresponding to the upper end face of the tested riser tube, a lower sealing gasket is arranged on the base corresponding to the lower end face of the tested riser tube, the lower sealing gasket is of a hollow annular structure, and the lower sealing gasket is communicated with pressurizing equipment. The counter-pressure casting riser tube leak hunting device is simple in structure, convenient to operate and high in practicability, the detected riser tube is clamped between the base and the pressing cover plate, the riser tube is pressurized after being sealed through the upper sealing gasket and the lower sealing gasket, rapid leak hunting of the riser tube is completed, and the leak hunting efficiency of the riser tube is improved. The problems of missed detection and misjudgment risks in a manual visual inspection mode are solved, the air tightness of the upper machine riser tube is guaranteed, and the casting quality of products is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts casting, in particular to a differential pressure casting riser pipe leakage detection device. Background Art

[0002] During the differential pressure casting process of automotive parts, the aluminum liquid furnace and the casting mold are connected by a riser pipe. Under pressure, the aluminum liquid flows from the furnace through the riser pipe to the mold and fills the mold cavity to complete the aluminum liquid filling. The airtightness of the riser pipe plays a vital role in the control of the aluminum liquid filling process and directly affects the stability of the filling process. If the riser pipe is not airtight, it is easy to cause unstable pressure during filling, and the aluminum liquid will be turbulent, causing the aluminum oxide film on the surface of the aluminum liquid to be wrapped inside the workpiece to form a workpiece casting defect, which seriously affects the product quality. If the defective workpiece enters the market, there is a very high risk of cracking during use, threatening driving safety. Therefore, it is very necessary to test the airtightness of the riser pipe before loading.

[0003] Currently, there is no mature detection device for the air tightness of the riser pipe. Usually, the air tightness of the riser pipe is determined by the operator through visual inspection, and the riser pipe is manually visually inspected for obvious cracks and other defects that may cause leakage. This detection method is too dependent on manual labor, and some small cracks are not easy to be found. In addition, it is affected by light, the operator's sense of responsibility and working status, and there is a risk of missed detection and misjudgment.

[0004] Based on this, developing a rising tube leakage detection device with simple structure, convenient operation and strong practicality is an urgent problem to be solved. Utility Model Content

[0005] The purpose of the utility model is to provide a differential pressure casting riser tube leak detection device to solve the problem that the current riser tube air tightness detection relies on manual visual inspection, small cracks are difficult to find, and are greatly affected by light, the operator's sense of responsibility and working status, resulting in a high risk of missed detection and misjudgment.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] A differential pressure casting riser tube leakage detection device comprises a base, the base is connected to a guide pillar, a clamping cover plate for clamping the riser tube to be measured is slidably connected to the guide pillar, a guide hole is opened on the clamping cover plate corresponding to the guide pillar, the guide hole and the guide pillar are slidably matched, an upper sealing gasket is arranged on the clamping cover plate corresponding to the upper end surface of the riser tube to be measured, and a lower sealing gasket is arranged on the base corresponding to the lower end surface of the riser tube to be measured, the lower sealing gasket is a hollow annular structure, and the lower sealing gasket is connected to a pressurizing device.

[0008] Preferably, a top plate is fixedly connected to the top of the guide pillar, so that the leak detection device forms a frame structure consisting of the base, the guide pillar and the top plate.

[0009] Preferably, a threaded through hole is opened on the top plate, a threaded adjustment rod is screwed into the threaded through hole corresponding to the clamping cover plate, the lower end of the threaded adjustment rod is rotatably connected to the clamping cover plate, and the upper end of the threaded adjustment rod extends out of the upper end surface of the top plate.

[0010] Preferably, a rotating handle is provided on the threaded adjustment rod.

[0011] Preferably, the base is provided with an air inlet for connecting to a charging device, the air inlet is connected to a charging channel provided in the base, and the charging channel is connected to a lower sealing pad.

[0012] Preferably, a sealing cone is provided on the lower sealing gasket corresponding to the inner diameter of the liquid riser.

[0013] Preferably, the leak detection device is connected with a pressure gauge for checking the pressure reading, the pressure gauge is arranged on the compression cover plate, and the pressure gauge is connected to the inner cavity of the measured riser tube through a pressure pipeline.

[0014] Preferably, the pressing cover plate is also provided with a timer for conveniently controlling the pressure holding time.

[0015] The beneficial effects of the utility model are:

[0016] The utility model provides a differential pressure casting riser leak detection device with simple structure, convenient operation and strong practicality. The riser to be tested is clamped between the base and the clamping cover plate, and the riser is pressurized after being sealed by the upper and lower sealing gaskets to complete the quick leak detection of the riser. It solves the problem that the manual visual inspection method is too dependent on manual labor, some small cracks are not easy to be found, and there is a risk of missed inspection and misjudgment due to the influence of light, the sense of responsibility of the operator and the working state. It ensures the air tightness of the upper machine riser and the casting quality of the product, and avoids the problem that the pressure is unstable during the filling process due to the poor air tightness of the riser, which easily causes the aluminum oxide film on the surface of the aluminum liquid to be wrapped inside the workpiece to form a workpiece casting defect, which seriously affects the product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model, wherein the measured riser tube, the upper sealing gasket and the lower sealing gasket are cross-sectional views.

[0019] Figure 2It is a schematic diagram of the planar structure of the utility model, wherein the measured liquid riser, the lower sealing gasket and the base are cross-sectional views.

[0020] In the figure: 1--base; 11--lower sealing gasket; 12--air inlet 12; 13--pressurization channel; 14--sealing cone; 2--guide pillar; 3--pressing cover plate; 31--upper sealing gasket; 4--top plate; 5--threaded adjustment rod; 6--rotating handle; 7--pressure gauge; 8--timer. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] like Figure 1-2 As shown, a differential pressure casting riser tube leakage detection device comprises a base 1, the base 1 is connected with a guide pillar 2, and the guide pillar 2 is slidably connected with a clamping cover plate 3 for clamping the measured riser tube. Specifically, a guide hole is opened on the clamping cover plate 3 corresponding to the guide pillar 2, and the guide hole is slidably matched with the guide pillar 2. An upper sealing gasket 31 is arranged on the clamping cover plate 3 corresponding to the upper end surface of the measured riser tube, and a lower sealing gasket 11 is arranged on the base 1 corresponding to the lower end surface of the measured riser tube. The lower sealing gasket 11 is a hollow annular structure, and the lower sealing gasket 11 is connected to a charging device to charge the measured riser tube.

[0023] When in use, adjust the height of the clamping cover plate 3 on the guide pillar 2, clamp the measured riser tube between the base 1 and the clamping cover plate 3, and press the upper end face and the lower end face of the riser tube against the upper sealing gasket 31 and the lower sealing gasket 11 respectively, so as to complete the installation and sealing of the measured riser tube. Start the pressure charging equipment, pressurize the riser tube to a certain pressure through the lower sealing gasket 11, and then stop the pressure charging, observe the pressure change within a certain period of time, so as to determine whether there is a pressure relief in the riser tube, so as to determine whether the air tightness of the measured riser tube meets the requirements of the machine. This embodiment completes the quick leak detection of the riser tube by clamping the measured riser tube between the base 1 and the clamping cover plate 3, and pressurizing the riser tube after sealing it through the upper and lower sealing gaskets 11. It solves the problem that the manual visual inspection method is too dependent on manual labor, some small cracks are not easy to be found, and there is a risk of missed detection and misjudgment due to the influence of light, the sense of responsibility of the operator and the working status.

[0024] As a preferred embodiment, the top of the guide pillar 2 is fixedly connected with a top plate 4, so that the leak detection device forms a frame structure composed of the base 1, the guide pillar 2 and the top plate 4, so as to improve the structural stability of the leak detection device. Furthermore, a threaded through hole is provided on the top plate 4, and a threaded adjustment rod 5 is screwed in the threaded through hole corresponding to the pressing cover plate 3, and the lower end of the threaded adjustment rod 5 is rotatably connected with the pressing cover plate 3, and the upper end of the threaded adjustment rod 5 extends out of the upper end surface of the top plate 4. By rotating the threaded adjustment rod 5, the threaded adjustment rod 5 is axially displaced, thereby driving the pressing cover plate 3 to produce a lifting action, thereby forming an action of clamping or loosening the measured riser tube. The provision of the threaded adjustment rod 5 in this embodiment facilitates the clamping and loosening operations of the measured riser tube, and improves the working efficiency. At the same time, it ensures the clamping force of the leak detection device on the measured riser tube, and improves the accuracy of the leak detection result.

[0025] Preferably, in order to facilitate the rotation operation of the threaded adjustment rod 5, a rotation handle 6 is provided on the threaded adjustment rod 5. The operator can conveniently and labor-savingly complete the lifting and lowering adjustment operation of the pressing cover plate 3 by turning the rotation handle 6, thereby ensuring the operation efficiency.

[0026] Preferably, if Figure 2 As shown, the base 1 is provided with an air inlet 12 for connecting to a charging device, which facilitates quick connection of the charging device. The air inlet 12 is connected to a charging channel 13 opened in the base 1, and the charging channel 13 is connected to the lower sealing pad 11.

[0027] Preferably, a sealing truncated cone 14 is provided on the lower sealing pad 11 corresponding to the inner diameter of the riser tube. When leak detection is performed, the inner diameter of the riser tube to be detected will be pressed against the conical surface of the sealing truncated cone 14, thereby improving the sealing performance of the end face of the riser tube and ensuring the accuracy of the leak detection result. At the same time, the conical surface structure of the sealing truncated cone 14 can meet the requirements of end face sealing of riser tubes with different inner diameters, thereby improving applicability.

[0028] Preferably, if Figure 2 As shown, in order to facilitate checking the pressure reading, the leak detection device is connected with a pressure gauge 7, which is arranged on the clamping cover plate 3 and connected to the inner cavity of the measured riser tube through a pressure pipeline. The clamping cover plate 3 is also provided with a timer 8 to facilitate the operator to control the pressure holding time.

[0029] The above disclosure is only a specific embodiment of the present patent, but the present patent is not limited thereto. For ordinary technicians in this field, without departing from the principle of the present invention, the deformation made should be deemed to belong to the protection of the present invention.

Claims

1. A differential pressure casting riser pipe leakage detection device, characterized in that: The invention comprises a base (1), the base (1) being connected to a guide pillar (2), the guide pillar (2) being slidably connected to a clamping cover plate (3) for clamping a measured lifting pipe, the clamping cover plate (3) being provided with a guide hole corresponding to the guide pillar (2), the guide hole being slidably matched with the guide pillar (2), an upper sealing gasket (31) being arranged on the upper end surface of the clamping cover plate (3) corresponding to the measured lifting pipe, and a lower sealing gasket (11) being arranged on the lower end surface of the measured lifting pipe, the lower sealing gasket (11) being a hollow annular structure, and the lower sealing gasket (11) being connected to a pressure charging device.

2. A differential pressure casting riser pipe leakage detection device according to claim 1, characterized in that: The top end of the guide pillar (2) is fixedly connected to a top plate (4), so that the leak detection device forms a frame structure consisting of the base (1), the guide pillar (2) and the top plate (4).

3. A differential pressure casting riser pipe leakage detection device according to claim 2, characterized in that: The top plate (4) is provided with a threaded through hole, in which a threaded adjustment rod (5) is threadedly connected corresponding to the pressing cover plate (3), the lower end of the threaded adjustment rod (5) is rotatably connected to the pressing cover plate (3), and the upper end of the threaded adjustment rod (5) protrudes from the upper end surface of the top plate (4).

4. A differential pressure casting riser pipe leakage detection device according to claim 3, characterized in that: The threaded adjustment rod (5) is provided with a rotating handle (6).

5. The differential pressure casting riser pipe leakage detection device according to claim 1, characterized in that: The base (1) is provided with an air inlet (12) for connecting to a charging device, the air inlet (12) is connected to a charging channel (13) provided in the base (1), and the charging channel (13) is connected to the lower sealing pad (11).

6. A differential pressure casting riser pipe leakage detection device according to claim 1, characterized in that: A sealing truncated cone (14) is provided on the lower sealing pad (11) corresponding to the inner diameter of the liquid riser.

7. A differential pressure casting riser pipe leakage detection device according to claim 1, characterized in that: The leak detection device is connected to a pressure gauge (7) for conveniently checking pressure readings. The pressure gauge (7) is arranged on the compression cover plate (3). The pressure gauge (7) is connected to the inner cavity of the measured riser tube through a pressure pipeline.

8. The differential pressure casting riser pipe leakage detection device according to claim 1, characterized in that: The pressing cover plate (3) is also provided with a timer (8) for conveniently controlling the pressure holding time.

Images