Compartmentalized seal and method of use

Abstract

The application relates to a cavity sealing device for sealing a workpiece to be detected with two through cavities, which comprises a first sealing assembly and a second sealing assembly, the second sealing assembly is used for simultaneously blocking a third opening through which the two cavities are connected and a second opening corresponding to the third opening, and the first sealing assembly is used for blocking other openings. The cavity sealing device disclosed by the application can realize independent sealing of the two cavities without machining bolt holes through reasonable structural design; and the cavity sealing device disclosed by the application is simple in structure, convenient to use and high in assembly efficiency.

Description

Technical Field

[0001] This invention relates to the field of testing equipment technology, and in particular to a cavity sealing device and its method of use. Background Technology

[0002] Pressure castings are subjected to liquid or gas pressure during use. Therefore, pressure tests are required on the internal cavities of pressure castings during the manufacturing stage to verify the strength and tightness of the cavities. For pressure castings with two interconnected cavities, the connection between the two cavities must be sealed, and other openings in both cavities must be sealed before conducting pressure tests on each individual cavity separately.

[0003] In existing technologies, after the pressure-bearing casting is precision-machined, bolt holes are machined on the flange faces of each opening, and bolts are used to connect the sealing element to the outer end of each opening to achieve sealing of each opening. However, it is difficult to machine bolt holes at the junction of the two cavities, and for the blank casting, the surface of the opening is rough and uneven, making it inconvenient to machine bolt holes. The sealing effect of the top pressure method is not ideal, which can easily cause pressure leakage and lead to test failure. Summary of the Invention

[0004] Therefore, it is necessary to provide a cavity sealing device and its usage method that are suitable for workpieces with through cavities and do not require machining bolt holes, in order to address the above problems.

[0005] To solve the above problems, the present invention adopts the following technical solution:

[0006] This invention discloses a cavity sealing device for sealing a workpiece under test. The workpiece includes a first cavity and a second cavity that pass through a third opening. The first cavity is further provided with a first opening and a second opening. The cavity sealing device includes a first sealing assembly and a second sealing assembly. The second sealing assembly includes a clamping plate, a supporting plate, and a threaded rod. The clamping plate is disposed at the first cavity end of the third opening. The supporting plate has a large end and a small end. The small end passes through the second opening, and the large end is sealed at the inner end of the second opening. The supporting plate is also provided with a threaded hole that matches the threaded rod. The threaded rod passes through the threaded hole and presses against the clamping plate. The clamping plate is sealed at the first cavity end of the third opening. The first sealing assembly is used to seal the first opening.

[0007] In one embodiment, the top clamping plate includes a sealing end and a fixing end, the fixing end being disposed within the third opening, and the sealing end sealing the first cavity end of the third opening.

[0008] In one embodiment, the second sealing assembly further includes a second sealing gasket and a third sealing gasket, the second sealing gasket being disposed between the large end and the inner end of the second opening; the third sealing gasket being disposed between the blocking end and the first cavity end of the third opening.

[0009] In one embodiment, the sealing gasket is a rubber gasket.

[0010] In one embodiment, the thread of the threaded rod is a fine thread.

[0011] In one embodiment, the first sealing assembly includes a pressure rod, a connecting rod, and a sealing element. A first end of the connecting rod is connected to the pressure rod, and a threaded section is provided at the second end of the connecting rod. The pressure rod enters the first cavity from the first opening and abuts against the inner end of the first opening. The sealing element is sleeved on the second end and matched with the threaded section for limiting, and the sealing element seals the outer end of the first opening.

[0012] In one embodiment, the first end of the connecting rod is rotatably connected to the pressure rod.

[0013] In one embodiment, the distances from both ends of the pressure rod to the connection between the connecting rod and the pressure rod are not equal.

[0014] In one embodiment, the first sealing assembly further includes a first sealing gasket disposed between the seal and the outer end of the first opening.

[0015] Secondly, embodiments of the present invention also disclose a method for using any of the cavity sealing devices described above, wherein the second sealing component is first used to seal the second opening and the third opening, and then the first sealing component is used to seal the first opening.

[0016] The technical solution adopted in this invention can achieve the following beneficial effects:

[0017] The cavity sealing device disclosed in this invention is designed for workpieces with two interconnected cavities. Through a reasonable structural design, it can achieve independent sealing of the two cavities without the need to machine bolt holes. Furthermore, the cavity sealing device disclosed in this invention has a simple structure, is easy to use, and has high assembly efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the cavity sealing device disclosed in an embodiment of the present invention;

[0019] Explanation of reference numerals in the attached figures:

[0020] 110 - First cavity, 120 - Second cavity, 111 - First opening, 112 - Second opening, 113 - Third opening;

[0021] 200 - First sealing assembly, 210 - Pressure rod, 220 - Connecting rod, 230 - Seal, 240 - Nut, 250 - First sealing gasket;

[0022] 300 - Second sealing assembly, 310 - Top clamping plate, 320 - Supporting plate, 330 - Threaded rod, 340 - Second sealing gasket, 350 - Third sealing gasket. Detailed Implementation

[0023] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0024] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," "top," "bottom," "end," "top," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0026] This invention discloses a cavity sealing device for sealing a workpiece under test, such as... Figure 1As shown, the workpiece to be tested has two cavities: a first cavity 110 and a second cavity 120, which are connected by a third opening 113. The first cavity 110 also has a second opening 112 and a first opening 111, wherein the second opening 112 and the third opening 113 are coaxially arranged, and the first opening 111 is larger than the second opening 112 and the first opening 111 is also larger than the third opening 113. The test process design requires that all three openings be sealed, and pressure tests be performed on the two cavities separately. The cavity sealing device disclosed in this embodiment of the invention includes a first sealing component 200 and a second sealing component 300. The first sealing component 200 is used to seal the first opening 111, and the second sealing component 300 is used to simultaneously seal the second opening 112 and the third opening 113.

[0027] Specifically, the second sealing assembly 300 includes a clamping plate 310, a supporting plate 320, and a threaded rod 330. The clamping plate 310 may include a sealing end and a fixing end. The fixing end matches the third opening 113, and the sealing end is larger than the third opening 113. The clamping plate 310 can enter the first cavity 110 from the first opening 111, with the fixing end positioned inside the third opening 113 and the sealing end positioned at the first cavity end of the third opening 113. The supporting plate 320 may include a large end and a small end. The small end matches the second opening 112, and the length of the small end is greater than the depth of the second opening 112. The large end is larger than the second opening 112. The supporting plate 320 can enter the first cavity 110 from the first opening 111, with the small end passing through the second opening 112 from the first cavity 110, so that the small end extends out of the outer end of the second opening 112 away from the large end, while the large end is positioned at the inner end of the second opening 112. The support plate 320 may also be provided with a threaded hole that matches the threaded rod 330, and this threaded hole extends through the entire support plate 320 from the small end to the large end. The threaded rod 330 is screwed into this threaded hole and passed through the support plate 320 until it presses against the tightening plate 310. The threaded limit between the threaded rod 330 and the threaded hole applies a reverse sealing force to both the tightening plate 310 and the support plate 320 simultaneously, thereby simultaneously sealing the inner end of the second opening 112 and the first cavity end of the third opening 113. Preferably, the limiting thread between the threaded rod 330 and the threaded hole is a fine-pitch thread.

[0028] In the embodiments disclosed in this invention, the second sealing assembly 300 may further include a second sealing gasket 340 and a third sealing gasket 350. The second sealing gasket 340 is disposed between the large end of the supporting pressure plate 320 and the inner end of the second opening 112, and the third sealing gasket 350 is disposed between the sealing end of the pressing pressure plate 310 and the first cavity end of the third opening 113. Preferably, the second sealing gasket 340 and / or the third sealing gasket 350 may be rubber gaskets.

[0029] Furthermore, the contact surface between the large end of the supporting pressure plate 320 and the second sealing gasket 340 can be a slope. This slope causes the height of the large end of the supporting pressure plate 320 to gradually decrease from its edge to its center. This slope also causes the pressure applied by the supporting pressure plate 320 to the second sealing gasket 340 to gradually increase from the center to the edge, thereby improving the sealing effect of the second sealing gasket 340. Similarly, the contact surface between the sealing end of the tightening pressure plate 310 and the third sealing gasket 350 can be a slope. This slope causes the height of the sealing end of the tightening pressure plate 310 to gradually decrease from its edge to its center.

[0030] In the embodiments disclosed in this invention, the first sealing assembly 200 may include a pressure rod 210, a connecting rod 220, and a sealing element 230. The first end of the connecting rod 220 is connected to the pressure rod 210, and the second end of the connecting rod 220 is provided with a threaded section. The pressure rod 210 enters the first cavity 110 through the first opening 111, and the second end of the connecting rod 220 is pulled back to abut against the inner end of the first opening 111. The sealing element 230 is sleeved on the second end of the connecting rod 220 to seal the outer end of the first opening 111.

[0031] Optionally, the seal 230 may have a through hole with an internal thread that matches the threaded section of the connecting rod 220. The seal 230 is fastened to the outer end of the first opening 111 through the internal thread of the through hole. Alternatively, the through hole may not have an internal thread. The seal 230 is fitted onto the second end of the connecting rod 220 through the through hole, and the seal 230 is fastened to the outer end of the first opening 111 by a nut 240 that matches the threaded section.

[0032] Furthermore, the first end of the connecting rod 220 is rotatably connected to the pressure rod 210 to facilitate the pressure rod 210 entering the first cavity 110 from the first opening 111 and to abut against the inner end of the first opening 111.

[0033] Preferably, the distances from both ends of the pressure rod 210 to the rotating connection part between the connecting rod 220 and the pressure rod 210 are not equal, that is, the weight of the two ends of the pressure rod 210 is unbalanced. Under its own weight, it is easy to deflect around the rotating connection part between it and the pressure rod 210, so that the pressure rod 210 can be removed from the first cavity 110 after the pressure test.

[0034] In the embodiments disclosed in this invention, a first sealing gasket 250 may be provided between the outer end of the sealing member 230 and the first opening 111. Preferably, the first sealing gasket 250 may be a rubber gasket.

[0035] Furthermore, the contact surface between the seal 230 and the first sealing gasket 250 can be a slope, which causes the thickness of the seal 230 to gradually decrease from its edge to its center. This slope causes the pressure applied by the seal 230 to the first sealing gasket 250 to gradually increase from the center to the edge, thereby improving the sealing effect of the first sealing gasket 250.

[0036] It should be noted that the first cavity 110 may be provided with multiple first openings 111. Correspondingly, the cavity sealing device disclosed in this embodiment of the invention may be provided with the same number of first sealing components 200 as the first openings 111, for sealing each first opening 111. Of course, the first openings 111 may also be provided in the second cavity 120, as long as corresponding first sealing components 200 are provided to seal them. This embodiment of the invention does not impose specific limitations on this.

[0037] This invention also discloses a method for using any of the above-described cavity sealing devices: first, the second sealing component 300 is used to seal the second opening 112 and the third opening 113, and then the first sealing component 200 is used to seal the first opening 111.

[0038] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A cavity sealing device for sealing a workpiece to be tested, the workpiece comprising a first cavity and a second cavity penetrating through a third opening, the first cavity further having a first opening and a second opening; characterized in that, The cavity sealing device includes a first sealing assembly and a second sealing assembly; The second sealing assembly includes a clamping plate, a supporting plate, and a threaded rod. The clamping plate enters the first cavity through the first opening and is disposed at the first cavity end of the third opening. The supporting plate has a large end and a small end. The supporting plate enters the first cavity through the first opening, the small end passes through the second opening, and the large end seals the inner end of the second opening. The supporting plate also has a threaded hole that matches the threaded rod. The threaded rod passes through the threaded hole and presses against the clamping plate. The clamping plate seals the first cavity end of the third opening. The first sealing assembly is used to seal the first opening.

2. The cavity sealing device according to claim 1, characterized in that, The top clamping plate includes a sealing end and a fixing end. The fixing end is disposed in the third opening, and the sealing end is sealed at the first cavity end of the third opening.

3. The cavity sealing device according to claim 2, characterized in that, The second sealing assembly further includes a second sealing gasket and a third sealing gasket, wherein the second sealing gasket is disposed between the large end and the inner end of the second opening; and the third sealing gasket is disposed between the blocking end and the first cavity end of the third opening.

4. The cavity sealing device according to claim 3, characterized in that, The second and / or third sealing gaskets are rubber gaskets.

5. The cavity sealing device according to claim 1, characterized in that, The thread on the threaded rod is a fine-pitch thread.

6. The cavity sealing device according to claim 1, characterized in that, The first sealing assembly includes a pressure rod, a connecting rod, and a sealing element. The first end of the connecting rod is connected to the pressure rod, and the second end of the connecting rod is provided with a threaded section. The pressure rod enters the first cavity from the first opening and abuts against the inner end of the first opening. The sealing element is sleeved on the second end and matched with the threaded section for limiting, and the sealing element seals the outer end of the first opening.

7. The cavity sealing device according to claim 6, characterized in that, The first end of the connecting rod is rotatably connected to the pressure rod.

8. The cavity sealing device according to claim 7, characterized in that, The distances from both ends of the pressure rod to the connection between the connecting rod and the pressure rod are not equal.

9. The cavity sealing device according to claim 6, characterized in that, The first sealing assembly further includes a first sealing gasket disposed between the seal and the outer end of the first opening.

10. A method of using the cavity sealing device as described in any one of claims 1 to 9, characterized in that, First, use the second sealing assembly to seal the second opening and the third opening, and then use the first sealing assembly to seal the first opening.

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