Workpiece vacuum level detection device

Abstract

A workpiece vacuum degree detection device, including the closed lower end and the open upper end setting jar body, the upper end of jar body is fixed with upper cover through screw, the lateral side of jar body is connected with outer connection pipe through screw thread, the outside end of outer connection pipe is connected with vacuum gauge jar body's lateral side is connected with connector, the connector is connected to vacuum pump through hard pipeline, the upper cover is coaxial and is formed with upper extension pipe in communication. The utility model improves the sealing effect between hard pipeline and jar body, sets up the taper ring through the inside end of hard pipeline, and carries out the sealing connection operation of buckle and taper ring through the internal thread ring, can improve the sealing effect between hard pipeline and jar body, and when the connector is connected, the sealing effect is improved by filling the sealing grease in each connecting part.

Description

Technical Field

[0001] This utility model relates to the field of workpiece inspection technology, and in particular to a workpiece vacuum degree detection device. Background Technology

[0002] After sintering and fine grinding, cemented carbide is often tested for porosity by vacuuming to determine if it meets requirements. However, current vacuum testing devices are complex and costly. Therefore, a simplified vacuum testing device was developed. The main body of the device is a sealed container with a small hole at the top. A vacuum gauge and connecting pipe are connected to the container's perimeter. The connecting pipe is connected to a vacuum pump via a pipeline. However, during vacuum testing, the connection between the pipeline and the connecting pipe often fails to seal properly, resulting in low testing accuracy. Furthermore, gaps between the workpiece and the small hole during operation can cause pressure leakage, further affecting the accuracy of the vacuum test. Utility Model Content

[0003] This invention provides a workpiece vacuum degree detection device to overcome the shortcomings of the prior art and solve the problem of low accuracy in workpiece vacuum degree detection, thus having strong practicality.

[0004] In order to achieve the purpose of this utility model, the following technology is proposed to be adopted: A workpiece vacuum degree detection device includes a tank that is closed at the bottom and open at the top, and a top cover is fixed to the top of the tank by screws. The tank body is connected to an external connecting pipe via threads, and a vacuum gauge is connected to the outer end of the external connecting pipe. The tank body is connected to connectors on its periphery, and these connectors are connected to the vacuum pump via rigid pipes. The upper cover has an upper extension tube formed coaxially and in connection.

[0005] Furthermore, an annular groove is provided at the upper end of the tank body, and a ring is formed on the lower wall of the cover. The ring passes through the annular groove, and the annular groove is filled with sealing grease.

[0006] Furthermore, the connector includes a connecting ring threaded to the periphery of the tank body. An inner tube is threaded to the inner circumference of the connecting ring. An outer tube is formed at the outer end of the inner tube. The outer diameter of the outer tube is larger than the inner diameter of the inner tube and smaller than the outer diameter of the connecting ring. An inner ring is formed on the outer circumference of the outer tube. A conical surface is formed on the outer circumference of the outer end of the outer tube. The outer end of the conical surface is the smaller end. A rotating ring is rotatably provided on the outer tube. The rotating ring is located between the inner ring and the connecting ring. An internal threaded ring is formed on the outer circumference of the rotating ring. An external threaded ring is threaded to the internal threaded ring. A cap is provided at the outer end of the external threaded ring. An inner conical surface is formed on the inner circumference of the cap. The outer end of the inner conical surface is the smaller end. The inner end of the external threaded ring abuts against the outer wall of the inner ring. A rigid pipe passes through the cap. The inner end of the rigid pipe has a conical ring. The conical surface of the outer tube abuts against the inner wall of the conical ring. The inner conical surface of the cap abuts against the outer wall of the conical ring.

[0007] Furthermore, a conical hole is provided at the lower end of the upper extension tube, and the upper end of the conical hole is the small end.

[0008] Furthermore, an upper extension sleeve is fitted onto the upper extension tube, and the upper extension sleeve has an upper hole that communicates with the upper extension tube. The lower end of the upper extension sleeve is formed with a mounting ring, which is fixed to the upper cover by screws. The upper end of the upper hole has an upper conical hole, and the lower end of the upper conical hole is a small end. The upper hole communicates with the upper conical hole, and the upper end of the upper conical hole has a countersunk hole. A pair of symmetrical hinge screws are threadedly connected to the outer circumference of the upper extension sleeve. A concave part is rotatably provided on the hinge screw, and a movable rod passes through the concave part. The lower end of the movable rod is threadedly connected to a pressure plate, and a spring is fitted onto the lower end of the movable rod. The spring is located between the pressure plate and the transverse section of the concave part.

[0009] The advantages of the above technical solution are: This invention improves the sealing effect between rigid pipes and tanks. By setting a conical ring on the inner end of the rigid pipe and using an internal threaded ring for sealing connection of the cap and the conical ring, the sealing effect between the rigid pipe and the tank can be improved. Furthermore, when connecting the joints, the sealing effect is enhanced by filling each connecting component with sealant.

[0010] This invention increases the contact area between the outer periphery of the cone at the lower end of the cylindrical workpiece and the upper conical hole by setting the upper conical hole. During testing, a vacuum pad is laid inside the upper conical hole to ensure the sealing effect between the lower end of the cylindrical workpiece and the upper conical hole, thus improving the accuracy of vacuum degree testing. In addition, pressure is applied to the cylindrical workpiece by a pressure plate in the early stage of vacuuming to improve the stability of the cylindrical workpiece after placement, and at the same time improve the sealing effect between the cylindrical workpiece and the conical hole in the early stage. Attached Figure Description

[0011] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will provide a more detailed description of this utility model in conjunction with the accompanying drawings.

[0012] Figure 1 A three-dimensional structural diagram of one embodiment is shown.

[0013] Figure 2 A cross-sectional structural diagram of one embodiment is shown.

[0014] Figure 3 A magnified view of point A is shown.

[0015] Figure 4 A magnified view of point B is shown. Detailed Implementation

[0016] like Figures 1-4 As shown, a workpiece vacuum degree detection device includes a tank 1 with a closed lower end and an open upper end. A top cover 10 is fixed to the upper end of the tank 1 by screws. An annular groove is formed at the upper end of the tank 1. A ring 11 is formed on the lower wall of the top cover 10. The ring 11 passes through the annular groove and is filled with sealant. An upper extension tube 12 is formed coaxially and in communication on the top cover 10. A conical hole 13 is formed at the lower end of the upper extension tube 12. The upper end of the conical hole 13 is the small end.

[0017] An upper extension sleeve 40 is fitted onto the upper extension tube 12. The upper extension sleeve 40 has an upper hole 41 that communicates with the upper extension tube 12. An installation ring 4 is formed at the lower end of the upper extension sleeve 40. The installation ring 4 is fixed to the upper cover 10 by screws. An upper conical hole 42 is formed at the upper end of the upper hole 41. The lower end of the upper conical hole 42 is the small end. The upper hole 41 communicates with the upper conical hole 42. A countersunk hole 43 is formed at the upper end of the upper conical hole 42. A pair of symmetrical hinge screws 44 are threadedly connected to the outer periphery of the upper extension sleeve 40. A concave part 45 is rotatably provided on the hinge screw 44. A movable rod 46 passes through the concave part 45. A pressure plate 47 is threadedly connected to the lower end of the movable rod 46. A spring 48 is fitted at the lower end of the movable rod 46. The spring 48 is located between the pressure plate 47 and the transverse section of the concave part 45.

[0018] The outer side of the tank body 1 is connected to an external connecting pipe 2 by threads, and a vacuum gauge 20 is connected to the outer end of the external connecting pipe 2.

[0019] A connector 3 is connected to the periphery of the tank body 1. The connector 3 is connected to the vacuum pump via a rigid pipe 38. The connector includes a connecting ring 30 that is threaded to the periphery of the tank body 1. An inner tube 31 is threaded to the inner circumference of the connecting ring 30. An outer tube 32 is formed at the outer end of the inner tube 31. The outer diameter of the outer tube 32 is larger than the inner diameter of the inner tube 31, and smaller than the outer diameter of the connecting ring 30. An inner ring 33 is formed on the outer circumference of the outer tube 32. A conical surface is formed on the periphery of the outer end of the outer tube 32, with the outer end of the conical surface being the smaller end. A rotating ring 34 is rotatably mounted on the outer tube 32. Ring 34 is located between inner ring 33 and connecting ring 30. The outer circumference of rotating ring 34 is formed with an internal threaded ring 35. An external threaded ring 36 is connected to the internal threaded ring 35 by threads. A cover 37 is provided on the outer end of the external threaded ring 36. The inner circumference of the cover 37 is formed with an inner conical surface. The outer end of the inner conical surface is the small end. The inner end of the external threaded ring 36 abuts against the outer wall of inner ring 33. A rigid pipe 38 is passed through the cover 37. The inner end of the rigid pipe 38 has a conical ring 39. The conical surface of the extension pipe 32 abuts against the inner wall of the conical ring 39. The inner conical surface of the cover 37 abuts against the outer wall of the conical ring 39.

[0020] In this embodiment, during operation, the operator places the cover 37 onto the rigid pipe 38, with the inner conical surface of the cover 37 abutting against the outer wall of the conical ring 39. Then, the cover 37 is fastened to the outer end of the extension pipe 32, and the inner threaded ring 35 is rotated to fix the cover 37 onto the extension pipe 32.

[0021] Next, a vacuum pad is laid in the countersunk hole 43 and the upper conical hole 42, and the vacuum pad has holes. Then, the conical platform at the lower end of the cylindrical workpiece is inserted into the upper conical hole 42, and the outer periphery of the conical platform abuts against the vacuum pad. Then, the concave part 45 is rotated so that the movable rod 46 is in a vertical state. Then, the movable rod 46 moves downward under the action of the spring 48 so that the lower wall of the pressure plate 47 acts on the upper end of the cylindrical workpiece, thereby making the outer periphery of the conical platform of the cylindrical workpiece abut against the vacuum pad.

[0022] Then, the vacuum pump is started to evacuate the tank 1. During the evacuation process, the vacuum gauge 20 is tested until there are no large fluctuations during the continuous evacuation, and the vacuum level is recorded.

[0023] Finally, after depressurization, the cylindrical workpiece is removed.

[0024] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations of this utility model fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A workpiece vacuum degree detection device, characterized in that, The tank (1) is closed at the bottom and open at the top, and the top of the tank (1) is fixed with a top cover (10) by screws. The tank body (1) is connected to an external connecting pipe (2) by a thread on its periphery, and a vacuum gauge (20) is connected to the outer end of the external connecting pipe (2). The tank body (1) is connected to a connector (3) on its periphery, and the connector (3) is connected to the vacuum pump through a rigid pipe. The upper cover (10) has an upper extension tube (12) formed coaxially and in communication.

2. The workpiece vacuum degree detection device according to claim 1, characterized in that, The upper end of the tank (1) is provided with an annular groove, and the lower wall of the cover (10) is formed with an annular member (11). The annular member (11) passes through the annular groove and is filled with sealing grease.

3. The workpiece vacuum degree detection device according to claim 1, characterized in that, The connector includes a connecting ring (30) threaded to the periphery of the tank body (1). An inner tube (31) is threaded to the inner periphery of the connecting ring (30). An outer tube (32) is formed at the outer end of the inner tube (31). The outer diameter of the outer tube (32) is larger than the inner diameter of the inner tube (31), and the outer diameter of the outer tube (32) is smaller than the outer diameter of the connecting ring (30). An inner ring (33) is formed on the outer periphery of the outer tube (32). A conical surface is formed on the outer periphery of the outer end of the outer tube (32), with the outer end of the conical surface being the smaller end. A rotating ring (34) is rotatably provided on the outer tube (32). The rotating ring (34) is located between the inner ring (33) and the connecting ring (30). Between, the outer periphery of the rotating ring (34) is formed with an internal threaded ring (35), and an external threaded ring (36) is connected to the internal threaded ring (35) by a thread. The outer end of the external threaded ring (36) is provided with a buckle (37). The inner periphery of the buckle (37) is formed with an inner conical surface. The outer end of the inner conical surface is the small end. The inner end of the external threaded ring (36) abuts against the outer wall of the inner ring (33). A rigid pipe (38) is passed through the buckle (37). The inner end of the rigid pipe (38) has a conical ring (39). The conical surface of the extension pipe (32) abuts against the inner wall of the conical ring (39). The inner conical surface of the buckle (37) abuts against the outer wall of the conical ring (39).

4. The workpiece vacuum degree detection device according to claim 1, characterized in that, A conical hole (13) is provided at the lower end of the upper extension tube (12), and the upper end of the conical hole (13) is the small end.

5. The workpiece vacuum degree detection device according to claim 1, characterized in that, An upper extension sleeve (40) is fitted onto the upper extension tube (12). The upper extension sleeve (40) has an upper hole (41) that communicates with the upper extension tube (12). A mounting ring (4) is formed at the lower end of the upper extension sleeve (40). The mounting ring (4) is fixed to the upper cover (10) by screws. An upper conical hole (42) is formed at the upper end of the upper hole (41). The lower end of the upper conical hole (42) is the small end. The upper hole (41) communicates with the upper conical hole (42). The upper end of the upper conical hole (42) is formed with... The countersunk hole (43) has a pair of symmetrical hinge screws (44) connected to the outer periphery of the upper extension sleeve (40) by threads. A concave part (45) is rotatably provided on the hinge screw (44). A movable rod (46) is passed through the concave part (45). A pressure plate (47) is connected to the lower end of the movable rod (46) by threads. A spring (48) is sleeved on the lower end of the movable rod (46). The spring (48) is located between the pressure plate (47) and the transverse section of the concave part (45).

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