Water pressure testing tool for universal spray pipe arched sectioning blanking cap

Abstract

The water pressure testing tool comprises a container body, an adapter ring and a pressing plate, a water inlet and outlet connecting nozzle is arranged on the side face of the container body, and the adapter ring is installed on the opening end face of the container body; the adapter ring is annular, the handle is fixedly installed on the side face of the adapter ring, the lower portion of the adapter ring is installed on the container body, the arch-shaped sectioning blanking cap is arranged on the upper portion of the adapter ring, through holes and threaded holes are evenly formed in the upper end face of the adapter ring, and the adapter ring is connected and pressed with the container body and the pressing plate through bolts. And the installed arched sectioning blanking cap, the adapter ring and the container body form a closed space. The sealing device is simple in structural form, convenient in technological operation, good in sealing performance and higher in universality. Besides, a rubber sealing gasket is adopted to replace an O-shaped sealing ring, so that the sealing performance of the tool is guaranteed, the purpose that all the arched sectioning blanking caps with the calibers smaller than the diameter of the sealing groove can share one hydraulic pressure test work is achieved, and the tool is multipurpose.

Description

Technical Field

[0001] The invention relates to a hydraulic pressure testing tool, in particular to a hydraulic pressure testing tool for a universal nozzle arched petal plugging cover. Background Art

[0002] The nozzle is an energy conversion device for solid rocket engines. It converts the heat energy of high-temperature combustion gas into kinetic energy, thereby generating thrust, and will bear a great impact force. The plug cap is one of the key components of the nozzle. Its main function is to quickly establish the engine ignition pressure, shorten the ignition delay time, and improve the ignition reliability. At the same time, it plays a role in sealing and moisture-proofing, preventing the internal engine grain and medicine box from getting wet, and ensuring the normal operation of the propellant and ignition. Its good sealing performance is the primary prerequisite for testing the sealing performance of the entire engine. At the same time, when the engine is working, the opening pressure of the nozzle plug cap is a key link that affects the working performance of the engine. Therefore, the pressure bearing capacity of the plug cap must be assessed. At present, there are many types of plug caps for solid rocket engines in China, and the traditional plug cap is a flat plug cap. In order to prevent flying objects or large flying objects after the plug cap is opened, some engines use a new structure of arched petal plug caps.

[0003] During the manufacturing process, the arched petal plugging cover needs to be subjected to a water pressure test, and the water pressure test requires a matching water pressure tool. During the water pressure test, the arched petal plugging cover needs to be fixed in the sealed space of the water pressure tool. At this time, the water pressure tool needs to cooperate with the arched petal plugging cover to form a common inner cavity of the water pressure tool and the arched petal plugging cover, and then the inner cavity is filled with water, sealed, and pressure is added and unloaded. The key to this water pressure process lies in the sealing performance of the water pressure test tool. Good sealing performance can make the water pressure test process more consistent with the actual stress condition of the plugging cover, so as to accurately judge the pressure bearing capacity of the arched petal plugging cover. The existing water pressure test tool structure is mainly designed for flat plugging covers, and cannot be well connected and sealed with the arched petal plugging cover; and when the size of the arched petal plugging cover changes, the sealing structure and method of the tooling must be redesigned and selected, and the versatility is poor, which greatly increases the production and manufacturing costs.

[0004] The existing hydraulic pressure test fixture structure mainly connects the flat plug cover and the container body through an adapter ring to form a closed water injection cavity. The connection method is that the adapter ring, the flat plug cover and the container body are all provided with threaded holes, and bolts are used for connection; the sealing method is to open an end face sealing groove on the contact surface of the plug cover and the adapter ring to place an O-ring for end face sealing. When the opening size of the plug cover changes, this sealing method may fail, and the versatility is poor. In addition, there are no threaded holes on the arched split-petal plug cover, and the existing hydraulic pressure test fixture is not suitable for the arched split-petal plug cover. Summary of the invention

[0005] The technical problem solved by the present invention is to provide a universal hydraulic test tool for a nozzle arched petal plugging cover, so as to solve the problem that there is no tool matching the arched petal plugging cover during hydraulic test.

[0006] In order to solve the existing technical problems, the technical solution adopted by the present invention is: a universal nozzle arched petal plugging cover water pressure testing tool, including a container body, an adapter ring and a pressure plate, the side of the container body is provided with an inlet and outlet water nozzle, and the adapter ring is installed on the open end face of the container body; the adapter ring is annular, and a handle is fixedly installed on the side of the adapter ring, the bottom of the adapter ring is installed on the container body, and the arched petal plugging cover is placed on the top of the adapter ring, the upper end face of the adapter ring is evenly provided with through holes and threaded holes, and is respectively connected and pressed with the container body and the pressure plate by bolts, and the installed arched petal plugging cover, the adapter ring and the container body form a closed space.

[0007] Furthermore, a sealing groove is provided on the open end face of the container body of the present invention for placing an O-ring to form an end face sealing structure with the adapter ring.

[0008] Furthermore, the O-ring of the present invention is made of G105 material.

[0009] Furthermore, the upper end surface of the adapter ring of the present invention is also provided with a sealing groove, the bottom of the sealing groove is sandblasted and then bonded with a rubber sealing gasket, and the arched petal plugging cover is installed on the rubber sealing gasket.

[0010] The hydraulic tooling of the present invention has a simple structure, convenient process operation, good sealing performance, and is more versatile. In addition, the tooling adopts a rubber sealing pad instead of an O-ring, which ensures the sealing performance of the tooling and achieves the purpose of using a common hydraulic pressure test for all arched petal plugging covers with a diameter smaller than the diameter of the sealing groove, thus achieving "one piece for multiple uses".

[0011] Beneficial Effects

[0012] The tooling of the present invention is designed according to the characteristics of the arched petal plugging cover, and solves the problem that the existing hydraulic pressure test tooling is not suitable for the arched petal plugging cover. At the same time, the tooling adopts a rubber sealing pad instead of an O-ring, and while ensuring the sealing performance of the tooling, all arched petal plugging covers with a diameter smaller than the diameter of the sealing groove can share a hydraulic pressure test tooling, thus realizing the "one piece for multiple uses" of the tooling.

[0013] The tooling of the present invention has a simple structure, is easy to process, has a low maintenance cost, is easy to operate, has good sealing performance, is more universal, saves production, manufacturing and testing costs, and has a good testing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1A schematic diagram of the structure of a water pressure testing tooling for an arched petal plugging cover of the present invention, wherein the following symbols are shown in the figure: 1-arched petal plugging cover, 2-container body, 3-adapter ring, 4-pressing plate, 5-rubber sealing gasket, 6-O-ring, 7-M10×60 bolt, 8-M10 washer, 9-M10 spring washer, 10-water inlet and outlet nozzle, 11-handle. DETAILED DESCRIPTION

[0015] The present invention is further described below in conjunction with specific embodiments and the accompanying drawings. The specific embodiments are only used to further illustrate the present invention and do not constitute a limitation to the claims of the present invention.

[0016] like Figure 1 As shown, a tool suitable for water pressure testing of an arched petal plugging cover is mainly composed of an arched petal plugging cover 1, a container body 2, an adapter ring 3, a pressure plate 4, a rubber sealing gasket 5, an O-ring 6, an M10×60 bolt 7, an M10 washer 8, an M10 spring washer 9, an inlet and outlet water nozzle 10 and a handle 11.

[0017] The container body 2 is welded with the water inlet and outlet nozzles 10, the handle 11 and the adapter ring 3, and the welding is required to be firm. After welding, all welds of the components are subjected to stress relief annealing, and the welding parts are subjected to magnetic flaw detection to ensure that there are no defects inside, and the welds are polished to be smooth.

[0018] The container body 2 is made of 30CrMnSiA material, and 40 M10 threaded holes are evenly distributed on its open end face. The container body 2 and the adapter ring 3 are fixedly connected with M10×60 bolts. At the same time, a sealing groove is provided on the open end face for placing an O-ring 6 to form an end face sealing structure with the adapter ring 3. The O-ring 6 is made of G105 material with a compression amount of 20% to 25%, thereby ensuring that the hydraulic tooling has a good sealing effect.

[0019] The adapter ring 3 is made of 30CrMnSiA material, and 40 φ11 smooth through holes and 8 M10 threaded holes are evenly distributed on the upper end surface, which are connected to the container body 2 and the pressure plate 4 with bolts respectively. In addition, a sealing groove is also opened on the upper end surface of the adapter ring 3, and the bottom of the sealing groove is sandblasted for bonding the rubber sealing gasket 5. The rubber sealing gasket 5 is made of G105 material with an elastic modulus of about 8MPa. The bonding surface between it and the bottom of the sealing groove must be polished to ensure firm bonding and form a good seal.

[0020] The pressing plate 4 is made of 30CrMnSiA material, has 8 φ11 smooth through holes evenly distributed, and is connected to the adapter ring 3 by bolts to press and fix the arched petal plugging cover 1.

[0021] The hydraulic pressure test fixture of the arched petal plugging cover connects the container body 2 and the adapter ring 3 with bolts, and forms an end face sealing structure through the O-ring 6. The arched petal plugging cover 1 is placed on the rubber sealing pad 5 in the end face sealing groove of the adapter ring 3. After the pressure plate 4 presses the arched petal plugging cover 1, it is firmly connected with the adapter ring 3 by bolts to ensure that the arched petal plugging cover 1 is between the pressure plate 4 and the adapter ring 3 to form a closed cavity structure. When connecting, washers 8 and spring washers 9 must be added to the bottom of the bolts to further increase the area of ​​the contact surface with the components, protect the surface of the components from wear, and enhance the stability and anti-loosening effect of the connection. During the hydraulic pressure test, water is injected from the water inlet and outlet nozzles 10. After the water is full, it continues to pressurize inward from the water inlet. After the pressure is pressurized to the target pressure, the water inlet and outlet nozzles 10 are blocked to ensure the air tightness of the overall tooling and maintain the pressure. After the pressure maintenance is completed, the pressure is released, thereby realizing the hydraulic pressure test of the arched petal plugging cover 1. According to the characteristics of the arched petal plugging cover, the tooling is designed with a pressure plate and an adapter ring to firmly connect the plugging cover; at the same time, a rubber sealing pad is used instead of an O-ring to ensure the sealing performance of the tooling while achieving the purpose of using a common water pressure test for all arched petal plugging covers with a diameter smaller than the sealing groove diameter, thereby improving the versatility of the tooling.

[0022] The hydraulic pressure test fixture of the present invention has been verified in the hydraulic pressure tests of multiple arched petal plugs. The hydraulic pressure test successfully passed the whole process of pressure increase, pressure maintenance and pressure relief. At the same time, the dimensions were re-measured after the hydraulic pressure test, and all structural dimensions and shape and position tolerances met the requirements, which fully demonstrated that the hydraulic pressure test fixture is safe and reliable, and has good sealing and versatility.

Claims

1. A universal nozzle arched petal plugging cover hydraulic pressure testing tool, comprising a container body (2), an adapter ring (3) and a pressure plate (4), characterized in that: The side of the container body (2) is provided with a water inlet and outlet nozzle (10), and the adapter ring (3) is installed on the open end face of the container body (2); the adapter ring (3) is annular, and a handle (11) is fixedly installed on the side of the adapter ring (3); the bottom of the adapter ring (3) is installed on the container body (2), and the top of the adapter ring (3) is provided with an arched petal plugging cover (1); the upper end face of the adapter ring (3) is evenly provided with through holes and threaded holes, and is respectively connected and pressed with the container body (2) and the pressure plate (4) by bolts; after installation, the arched petal plugging cover (1), the adapter ring (3) and the container body (2) form a closed space.

2. The hydraulic pressure testing tool according to claim 1, characterized in that: A sealing groove is provided on the open end face of the container body (2) for accommodating an O-ring (6) to form an end face sealing structure with the adapter ring (3).

3. The hydraulic pressure testing tool according to claim 1 or 2, characterized in that: The O-ring (6) is made of G105 material.

4. The hydraulic pressure testing tool according to claim 1, characterized in that: The upper end surface of the adapter ring (3) is also provided with a sealing groove, the bottom of the sealing groove is sandblasted and then bonded with a rubber sealing pad (5), and the arched petal plugging cover (1) is installed on the rubber sealing pad (5).

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