Water pressure testing tool for universal spray pipe arched sectioning blanking cap
By designing a water pressure testing tool suitable for arched split plug covers and using rubber sealing gaskets instead of O-rings, the problem that existing tooling cannot be used is solved, the versatility and sealing of the tooling are achieved, and the cost is reduced.
Patent Information
- Application Number
- CN202422716025.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-08
- Publication Date
- 2025-10-03
- Estimated Expiration
- 2034-11-08
AI Technical Summary
The existing water pressure test tooling structure is mainly designed for flat plugging covers, which cannot be well connected and sealed with arched petal plugging covers. It needs to be redesigned when the size changes, has poor versatility, and cannot be applied to arched petal plugging covers.
A water pressure testing tooling was designed, which included a container body, an adapter ring and a pressure plate. Rubber sealing gaskets were used instead of O-rings, and a closed space was formed by bolt connections. The tooling was suitable for arched petal plugs of different sizes.
The universality and sealing performance of the tooling are achieved, the production and testing costs are reduced, and it is suitable for arched petal plugging covers of various calibers, ensuring the accuracy and reliability of the test.
Smart Images
Figure CN223413115U_ABST
Abstract
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, as the energy conversion device in a solid rocket engine, converts the thermal energy of high-temperature combustion gases into kinetic energy, generating thrust. This force is subject to significant impact. The nozzle cap is a key component of the nozzle. Its primary function is to rapidly establish engine ignition pressure, shorten ignition delay, and improve ignition reliability. It also provides a moisture-proof seal, protecting the internal grain and cartridge from moisture, ensuring proper propellant and ignition operation. Proper sealing performance is paramount in verifying the sealing performance of the entire engine. Furthermore, the pressure at which the nozzle cap opens during engine operation is a key factor affecting engine performance, making its pressure-bearing capacity critically important. Currently, there are numerous types of caps for solid rocket engines in China. Traditionally, these caps are flat. To prevent projectiles or large pieces of material from flying out after opening, some engines are now adopting a new arched, split-flap cap structure.
[0003] During the manufacturing process, the arched petal plugging cover needs to be subjected to a water pressure test, which 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 for the water pressure tool and the arched petal plugging cover, and then the inner cavity is filled with water, sealed, and pressurized. 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 conditions of the plugging cover, thereby accurately judging 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 tool must be redesigned and selected, which has poor versatility and greatly increases the production and manufacturing costs.
[0004] Existing hydraulic test fixtures primarily connect the flat plug and container body via an adapter ring, creating a sealed water-filled cavity. The adapter ring, flat plug, and container body are all threaded with bolts. Sealing is achieved by inserting an O-ring into the contact surface between the plug and adapter ring, creating an end-face sealing groove. This seal can fail if the plug opening size changes, resulting in limited versatility. Furthermore, the arched split plug does not have threaded holes, making existing hydraulic test fixtures unsuitable for this type of plug. 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 that can match 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 fixed 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, and the upper end face of the adapter ring is evenly distributed with through holes and threaded holes and is connected and tightened with the container body and the pressure plate by bolts. After installation, the arched petal plugging cover, the adapter ring and the container body form an enclosed 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 fixture of the present invention features a simple structure, easy operation, excellent sealing performance, and increased versatility. Furthermore, the fixture utilizes a rubber gasket instead of an O-ring, ensuring the fixture's sealing performance while allowing all arched, split-flap plugs with diameters smaller than the sealing groove to share a common hydraulic pressure test mechanism, thus achieving a "one-piece, multi-purpose" fixture.
[0011] Beneficial effects
[0012] The fixture of this invention is designed specifically for arched split-flap plugs, resolving the problem that existing hydraulic pressure test fixtures are unsuitable for these types of plugs. Furthermore, the fixture uses rubber gaskets instead of O-rings, ensuring the fixture's tightness while allowing all arched split-flap plugs with a diameter smaller than the sealing groove to share a single hydraulic pressure test fixture, achieving a "one-piece, multi-purpose" design.
[0013] The tooling of the present invention has a simple structure, is easy to process, has low maintenance cost, is easy to operate, has good sealing performance, is more universal, saves production, manufacturing and testing costs, and has good testing effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1Schematic diagram of the structure of the water pressure testing tooling for the arched petal plugging cover of the present invention, wherein the following symbols are indicated in the figure: 1-arched petal plugging cover, 2-container body, 3-adapter ring, 4-pressure 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 will be 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 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 to the water inlet and outlet nozzles 10, and the handle 11 is welded to the adapter ring 3. This welding process must be secure. After welding, all welds are stress-relieved and annealed. The welds are magnetically inspected to ensure they are free of internal defects. The welds are then polished to a smooth surface.
[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 the 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% to ensure that the hydraulic tooling has a good sealing effect.
[0019] The adapter ring 3 is made of 30CrMnSiA material. Its upper surface is uniformly distributed with 40 smooth φ11 through-holes and 8 M10 threaded holes, which are bolted to the container body 2 and the pressure plate 4, respectively. Furthermore, the upper surface of the adapter ring 3 features a sealing groove, the bottom of which is sandblasted for bonding to the rubber sealing gasket 5. The rubber sealing gasket 5 is made of G105 material with an elastic modulus of approximately 8 MPa. The surface where it bonds to the bottom of the sealing groove is polished to ensure a secure bond and a good seal.
[0020] The pressing plate 4 is made of 30CrMnSiA material and has 8 smooth through holes of φ11 evenly distributed thereon. It is connected to the adapter ring 3 with bolts and is used to compress and fix the arched petal plugging cover 1.
[0021] The hydraulic pressure test fixture for the arched petal plugging cover connects the container body 2 and the adapter ring 3 with bolts, and forms an end-face seal structure with an O-ring 6. The arched petal plugging cover 1 is placed on the rubber sealing gasket 5 in the end-face sealing groove of the adapter ring 3. After the pressure plate 4 compresses the arched petal plugging cover 1, it is firmly connected to the adapter ring 3 with bolts, ensuring that the arched petal plugging cover 1 is located between the pressure plate 4 and the adapter ring 3, forming 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 contact area with the component, protect the component surface 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. Once the water is full, pressure is continuously applied inward from the water inlet. After the pressure is increased to the target pressure, the water inlet and outlet nozzles 10 are blocked to ensure the airtightness of the entire fixture and maintain pressure. After the pressure is maintained, the pressure is released, thus completing the hydraulic pressure test of the arched petal plugging cover 1. Based on the characteristics of the arched split-flap 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 gasket is used instead of an O-ring to ensure the sealing performance of the tooling while achieving the purpose of allowing all arched split-flap plugging covers with a diameter smaller than the sealing groove diameter to share a common water pressure test work, thereby improving the versatility of the tooling.
[0022] The hydraulic pressure testing fixture of this invention has been verified in hydraulic tests on multiple arched, split-flap plugs. The hydraulic pressure tests successfully completed the entire process of pressure increase, pressure maintenance, and pressure relief. Furthermore, dimensional re-measurements after the hydraulic pressure tests confirmed that all structural dimensions and geometric tolerances met requirements, fully demonstrating the safety, reliability, sealing, and versatility of the hydraulic pressure testing fixture.
Claims
1. A universal nozzle arched petal plugging cover hydraulic pressure test 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 an inlet and outlet water connection nozzle (10), and the adapter ring (3) is installed on the open end surface 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 surface 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-shaped sealing ring (6) to form an end face sealing structure with the adapter ring (3).
3. The hydraulic pressure testing tool according to claim 2, characterized in that: The O-shaped sealing 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 gasket (5), and the arched petal plugging cover (1) is installed on the rubber sealing gasket (5).