A ring bottom liquid flow detection tool and detection method

Abstract

The present application relates to a kind of ring bottom liquid flow detection tool and detection method, belong to ring bottom product liquid flow detection technical field, meet the demand of ring bottom product sealing and multiple small hole detection, its liquid flow detection tool includes inlet ring cavity component, shell, flange, pressing plate, inner tube, annular plug, upper protective pad, lower protective pad, handle, radial seal ring, first connecting fastener, second connecting fastener, fastener.Ring-shaped plug is wedge-shaped structure, including 2 half-ring-shaped plugs.Its liquid flow detection method includes the steps of inner tube installation, ring bottom is placed into shell, ring bottom inner wall support, flange fastening, flow and flow resistance detection.The present application is used for the diameter 300mm above ring bottom liquid flow detection.

Description

Technical Field

[0001] This invention belongs to the field of liquid flow detection technology for ring bottom products, specifically relating to a ring bottom liquid flow test fixture and detection method. Background Technology

[0002] For ring-bottom products with a diameter of 300mm or more, when the product material is relatively soft, it is easy to deform after being subjected to pulsating high pressure test. The surface roughness of the product is required to be high. Scratches, indentations and other quality problems must not occur during the installation process. The product is heavy and the product surface is smooth, making transportation, installation and disassembly difficult. Summary of the Invention

[0003] To meet the requirements of sealing the bottom of the ring product and detecting multiple small holes, this invention proposes a ring bottom liquid flow detection fixture and detection method.

[0004] The technical solution adopted by this invention to solve its technical problem is:

[0005] A bottom ring fluid flow detection fixture includes an inlet ring cavity assembly, a housing, a flange, a pressure plate, an inner tube, an annular plug, an upper protective pad, a lower protective pad, a handle, a radial sealing ring, a first connecting fastener, a second connecting fastener, and fasteners.

[0006] The inner tube is located inside the ring bottom. The inner bottom of the ring bottom is connected to the upper protective pad, and the upper protective pad is connected to the inner tube. The inner opening of the side wall of the ring bottom is connected to the ring plug, and the ring plug is connected to the inner tube. The bottom inner side of the side wall of the ring bottom is connected to the inner tube. The pressure plate is connected to the inner tube and the ring plug. The opening of the inner tube is connected to the pressure plate. The inner tube and the pressure plate can be fastened together by fasteners or by a handle. The pressure plate presses the ring plug tightly, making the ring plug in close contact with the ring bottom and the inner tube. The upper protective pad is located on the inner side of the bottom of the ring bottom, and the lower protective pad is located on the outer side of the bottom of the ring bottom. The second connecting fastener connects and fastens the inner tube, upper protective pad, ring bottom, and lower protective pad in sequence.

[0007] The annular plug has a wedge-shaped structure and includes two semi-annular plugs.

[0008] The inner tube is provided with a keyhole for removing the annular plug.

[0009] The inlet annular cavity assembly includes an annular cavity and a nozzle, the nozzle being used for water to enter the annular cavity. The annular cavity has a hollow structure with a hole on the bottom side for the detection liquid to enter the bottom of the annular cavity. The annular cavity has an annular notch corresponding to the water inlet on the bottom of the annular cavity.

[0010] The flange, inlet annular cavity assembly, housing, radial sealing ring, and lower protective gasket are located outside the bottom of the ring. The first connecting fastener connects and secures the flange, annular cavity, and housing sequentially. The annular cavity and the bottom of the ring have a clearance fit, and two radial sealing rings are located between the annular cavity and the bottom of the ring.

[0011] The aforementioned fluid flow detection fixture has four connectors, each with a diameter of DN20.

[0012] In the aforementioned fluid flow detection fixture, the annular cavity has 90 Ф9 holes on the bottom side of the annular cavity.

[0013] In the above-mentioned fluid flow detection fixture, the outer wall of the inner tube and the inner wall of the ring bottom are in clearance fit, with a fit clearance of 0.4mm to 1.0mm.

[0014] The inner tube of the aforementioned fluid flow detection fixture is made of aluminum.

[0015] In the aforementioned fluid flow detection fixture, a guide rod is provided at the top of the second connecting fastener, and a positioning hole is provided in the housing, through which the guide rod is positioned.

[0016] In the aforementioned fluid flow detection fixture, the annular plug is made of polytetrafluoroethylene.

[0017] In the aforementioned fluid flow detection fixture, the radial sealing ring is an O-ring rubber seal.

[0018] A method for detecting bottom fluid flow in an annular ring includes the following steps:

[0019] Step S1, Inner tube installation

[0020] The inner tube, upper protective pad, ring bottom, and lower protective pad are connected by a second connecting fastener, and the handle is connected to the inner tube.

[0021] Step S2, insert the ring bottom into the housing.

[0022] Insert the inner tube, upper protective pad, ring bottom, lower protective pad, and handle into the housing.

[0023] Step S3, inner wall support of the ring bottom

[0024] Remove the handle and install the pressure plate and ring plug. Install the ring plug between the inner tube and the inner wall of the ring bottom, and fasten it with fasteners. The pressure plate and inner tube compress the ring plug, supporting the inner wall of the ring bottom.

[0025] Step S4, flange tightening

[0026] Install the radial seal ring and inlet annular cavity assembly. Use the first connecting fastener to connect and secure the flange, inlet annular cavity assembly, and housing.

[0027] Step S5, Flow rate and flow resistance detection

[0028] Water is introduced through the nozzle to test the flow rate and flow resistance of the liquid in the small hole at the bottom of the ring.

[0029] The beneficial effects of this invention are:

[0030] A bottom ring flow detection fixture employs a compression-type radial sealing structure, effectively separating the radial sealing process from the installation process. During product installation, the radial sealing ring can be installed separately between the housing and the inlet ring cavity assembly. This avoids problems such as excessive and uneven friction during installation with the radial sealing ring, which can lead to fixture instability, installation difficulties, and easy scratching of the product's outer wall. Simultaneously, it provides a structural and methodological reference for the installation of large annular structure products and radial rubber ring sealing.

[0031] A ring-bottom liquid flow testing fixture adopts a combination of pressure plate, ring plug, and inner tube, which can effectively ensure that the bottom of the copper ring does not deform. The ring plug is made of polytetrafluoroethylene and has a wedge-shaped structure. Through the compression of the entire ring surface, it ensures that the roundness of the product does not change during the entire test external pressure change, while ensuring the inner wall remains intact; thus solving the problem of easy deformation of copper ring products.

[0032] A ring-bottom liquid flow detection tool has a keyhole structure inside the inner tube to facilitate the removal of the ring plug.

[0033] A new type of bottom ring liquid flow detection fixture is developed by disassembling the original fixture in a more refined manner, which can reduce the weight of the parts during installation and reduce the labor intensity of manual installation.

[0034] A ring-bottom liquid flow detection fixture is provided. The product has a large bowl-shaped structure, which is difficult to operate manually or mechanically during normal transportation, installation and disassembly. The fixture adds a support and connection structure to the entire inner wall, and adds a connecting handle or lifting ring at the upper end to effectively simplify the transportation and installation of the product, reduce labor intensity and ensure the safety and quality of the product while ensuring that the product does not deform.

[0035] A method for detecting fluid flow at the bottom of a ring is provided for detecting fluid flow in ring-bottom products with a diameter of 300 mm or more. Attached Figure Description

[0036] Figure 1 This is an assembly diagram of the bottom ring liquid flow test fixture according to Embodiment 1 of the present invention;

[0037] Figure 2 This is a schematic diagram of the ring bottom structure according to Embodiment 1 of the present invention;

[0038] Figure 3 yes Figure 2 Enlarged view of a portion of the flow channel;

[0039] Figure 4 This is a schematic diagram of the bottom ring liquid flow detection principle in Embodiment 1 of the present invention;

[0040] Figure 5 This is an installation diagram of the inner tube, protective pad, handle, and ring bottom according to Embodiment 1 of the present invention.

[0041] Figure 6This is a cross-sectional view of the annular plug according to Embodiment 1 of the present invention;

[0042] Figure 7 This is a top view of the housing according to Embodiment 1 of the present invention;

[0043] Figure 8 This is a front view of the housing according to Embodiment 1 of the present invention;

[0044] Figure 9 This is a front view of the inlet annular cavity assembly according to Embodiment 1 of the present invention;

[0045] Figure 10 This is a top view of the inlet annular cavity assembly according to Embodiment 1 of the present invention;

[0046] Figure 11 This is a schematic diagram of the radial sealing ring position in Embodiment 1 of the present invention.

[0047] Reference numerals: 1. Inlet annular cavity assembly, 2. Housing, 3. Flange, 4. Pressure plate, 5. Inner tube, 6. Annular plug, 7. Upper protective element, 8. Lower protective element, 9. Handle, 10. Radial sealing ring, 11. First connecting fastener, 13. Second connecting fastener, 15. Fastener, 16. Ring bottom. Detailed Implementation

[0048] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0049] Example 1

[0050] An installation process for a bottom ring liquid flow detection fixture, such as Figure 1 As shown, the testing fixture mainly includes an inlet annular cavity assembly 1, a housing 2, a flange 3, a pressure plate 4, an inner tube 5, an annular plug 6, an upper protective pad 7, a lower protective pad 8, a handle 9, a radial sealing ring 10, and fasteners, etc.

[0051] The inner tube 5, upper protective pad 7, lower protective pad 8, and ring bottom 16 are securely connected by the second connecting fastener 13. Then, two handles 9 are connected, forming a single unit. This unit is manually inserted into the housing 2. A guide rod is positioned at the top of the second connecting fastener 13. Before the ring bottom 16 contacts the housing 2, the guide rod enters the positioning hole at the lower end of the housing. Then, the first radial sealing ring 10 is placed, followed by the inlet ring cavity assembly 1. The inlet ring cavity assembly 1 and the ring bottom 16 are fitted with a clearance fit. An annular notch is left on the inner wall of the ring cavity assembly, connecting to the water inlet of the ring bottom. Figure 1 The middle channel inlet corresponds to the first radial sealing ring 10; then place the base flange 3 and connect the first connecting fastener 11; thus completing the fixing and sealing of the entire inlet channel.

[0052] Finally, to support the inner wall of the product, an annular plug 6 is installed between the inner tube 5 and the inner wall of the ring bottom. Then, pressure plate 4 and fastener 15 are installed. The force of fastener 15 compresses the annular plug, supporting the inner wall of the product. This ensures that the inner wall can support the product without deformation when it is compressed by high-pressure medium in the inlet area.

[0053] Finally, tighten the first connecting fastener 11 above the base flange again. The two radial sealing rings 10 that are in contact with the outer wall of the product will generate radial deformation through end face compression, thereby generating sealing force.

[0054] Key points of the installation process:

[0055] There is a ring of evenly distributed through holes (not shown) at the bottom of the inner tube and the bottom of the ring. Bolts and nuts connect and fasten the inner tube, upper and lower protective pads and the bottom of the ring. Then, two handles are installed, mainly for protecting the product and facilitating product transportation.

[0056] Tooling key points:

[0057] 1. The inner tube outer wall and the inner circle of the ring bottom are fitted with a clearance of 0.4 to 1.0 mm;

[0058] 2. The inner tube is made of aluminum, mainly to reduce weight while ensuring support strength, making it easier for testers to operate;

[0059] 3. After the test, water remains on the bottom of the inner ring. The purpose of setting four key holes on the inner tube is to balance the pressure between the inner and outer walls of the inner tube. Due to the large surface area of ​​the product, this is to prevent the inner tube from being unable to be removed during disassembly after the test.

[0060] 4. The four keyholes on the inner tube are also for the purpose of facilitating the removal of the ring plug after the test.

[0061] Figure 5 The inner tube assembly shown is completely placed inside the housing 6, and the outer wall of the ring bottom is clearance-fitted with the housing.

[0062] Tooling key points:

[0063] Figure 4 The two fastening bolts and nuts inside the installed inner tube assembly have hexagonal bolts that fit perfectly into the two threaded notches on the outer shell (see...). Figure 6 Then, fix the other bolts on the center line of the bolt to the housing.

[0064] Tooling key points:

[0065] 1. The annular cavity has an internal hollow structure, with a 90-Ф9 hole near the product inlet to ensure that water flows into the product evenly.

[0066] 2. The annular cavity is equipped with four DN20 inlet nozzles to ensure uniform water flow into the annular cavity; pressure measuring points are set inside the annular cavity for easy monitoring of the annular cavity pressure.

[0067] Tooling key points:

[0068] 1. Ordinary radial seals are assembled with compression, which is suitable for applications with small sealing diameters and low friction. However, for products with large sealing diameters, installation is almost impossible. The extrusion-type radial seal structure can pre-set grooves according to the inner and outer diameters of the rubber sealing ring, allowing the O-ring and tooling to be easily inserted. After installation, the pressure plate compresses to generate the preset compression, which can meet the sealing effect under different pressures.

[0069] The process and principle of ring bottom detection, and the flow channel at the ring bottom, as follows: Figure 2 As shown, multiple small holes are evenly distributed circumferentially. The purpose of the test is to detect the flow rate and flow resistance characteristics of these holes using a water medium. This invention designs a liquid flow testing fixture to meet the requirements of sealing and testing multiple small holes. It mainly relates to a ring-bottom liquid flow testing fixture and its assembly / disassembly method.

[0070] Water enters through the standard inlet on the annular cavity assembly. The inner wall of the annular cavity assembly has small holes of 90-Ф9. After entering the annular cavity, water flows out evenly through these holes, entering the gap between the annular cavity assembly and the bottom of the annular cavity. Extrusion-type radial sealing rings are installed above and below the water inlet near the bottom of the annular cavity. High-pressure water then flows back into the product, along... Figure 2 The flow path shown is used to complete the testing of the entire bottom ring.

[0071] Applications: Primarily used for ring-bottom products with a diameter of 300mm or more. These products are characterized by their relatively soft material, which makes them prone to deformation under pulsating high-pressure testing. They also require a high degree of surface roughness and must not produce scratches, indentations, or other quality issues during installation. Furthermore, they are heavy, have a smooth surface, and are difficult to transport, install, and disassemble.

Claims

1. A bottom ring liquid flow detection fixture, characterized in that, Includes an inlet annular cavity assembly (1), housing (2), flange (3), pressure plate (4), inner tube (5), annular plug (6), upper protective pad (7), lower protective pad (8), handle (9), radial sealing ring (10), first connecting fastener (11), second connecting fastener (13), and fastener (15); The pressure plate (4), inner tube (5), ring plug (6), and upper protective pad (7) are located inside the ring bottom (16); The inner tube (5) is located inside the ring bottom (16). The inner bottom of the ring bottom (16) is in contact with the upper protective pad (7), and the upper protective pad (7) is in contact with the inner tube (5). The inner opening of the side wall of the ring bottom (16) is in contact with the ring plug (6), and the ring plug (6) is in contact with the inner tube (5). The bottom of the inner side wall of the ring bottom (16) is in contact with the inner tube (5). The pressure plate (4) is in contact with the inner tube (5) and the ring plug (6). The opening of the inner tube (5) is in contact with the pressure plate (4). Next, the inner tube (5) and the pressure plate (4) are connected and fastened by fasteners (15) or by handles (9); the pressure plate (4) presses the ring plug (6) so that the ring plug (6) is in close contact with the ring bottom (16) and the inner tube (5); the lower protective pad (8) is located on the outside of the bottom of the ring bottom (16), and the second connecting fastener (13) connects and fastens the inner tube (5), the upper protective pad (7), the ring bottom (16) and the lower protective pad (8) in sequence. The annular plug (6) has a wedge-shaped structure and includes two semi-annular plugs; The inner tube (5) is provided with a keyhole for removing the annular plug (6); The inlet annular cavity assembly (1) includes an annular cavity and a nozzle. The nozzle is used for water to enter the annular cavity. The annular cavity has an internal hollow structure and a hole is provided on the side of the annular bottom (16) for detection liquid to enter the annular bottom (16). The annular cavity is provided with an annular notch, which corresponds to the water inlet of the annular bottom (16). The flange (3), inlet annular cavity assembly (1), housing (2), radial sealing ring (10), and lower protective gasket (8) are located outside the ring bottom (16). The first connecting fastener (11) connects and fastens the flange (3), annular cavity, and housing (2) that are connected in sequence. The annular cavity and the ring bottom (16) are in clearance fit. The radial sealing ring (10) is located between the annular cavity and the ring bottom (16). Two radial sealing rings (10) are provided.

2. The annular bottom fluid flow detection fixture according to claim 1, characterized in that, The system has four connectors, each with a diameter of DN20.

3. The annular bottom fluid flow detection fixture according to claim 1, characterized in that, The annular cavity has 90 Ф9 holes on the bottom (16) side.

4. The annular bottom fluid flow detection fixture according to claim 1, characterized in that, The outer wall of the inner tube (5) and the inner wall of the ring bottom (16) are fitted with a clearance of 0.4mm to 1.0mm.

5. The annular bottom fluid flow detection fixture according to claim 1, characterized in that, The inner tube is made of aluminum.

6. The annular bottom fluid flow detection fixture according to claim 1, characterized in that, The second connecting fastener (13) has a guide rod at its top and a positioning hole in the housing (2). The guide rod is positioned through the positioning hole.

7. The annular bottom fluid flow detection fixture according to claim 1, characterized in that, The annular plug (6) is made of polytetrafluoroethylene.

8. The annular bottom fluid flow detection fixture according to claim 1, characterized in that, The radial sealing ring (10) is an O-ring rubber seal.

9. A method for detecting bottom flow in an annular ring, using the bottom flow detection fixture according to any one of claims 1 to 8, characterized in that, Includes the following steps: Step S1, Inner tube installation: The inner tube (5), upper protective pad (7), ring bottom (16), and lower protective pad (8) are connected by the second connecting fastener (13), and the handle (9) is connected to the inner tube (5); Step S2, insert the ring bottom (16) into the shell (2): Place the inner tube (5), upper protective pad (7), ring bottom (16), lower protective pad (8), and handle (9) connected together into the housing (2); Step S3, inner wall support of the ring bottom (16): Remove the handle (9), install the pressure plate (4) and the ring plug (6); install the ring plug (6) between the inner tube (5) and the inner wall of the ring bottom (16), and fasten it with fasteners (15). The pressure plate (4) and the inner tube (5) squeeze the ring plug (6) to support the inner wall of the ring bottom (16); Step S4, flange (3) tightening: Install the radial sealing ring (10) and the inlet annular cavity assembly (1); use the first connecting fastener (11) to connect and fasten the flange (3), the inlet annular cavity assembly (1), and the housing (2); Step S5, Flow rate and flow resistance detection: Water was introduced into the nozzle, and the flow rate and flow resistance of the liquid flow through the small hole at the bottom of the ring (16) were measured.

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