Replaceable quick pressure measuring tool for flange joint structure

Abstract

The utility model discloses a replaceable quick pressure measuring tool of flange joint structure for sealed pressure measurement after hydraulic pipeline assembly production. The tool is composed of a flange fixing seat, a replaceable flange gland and fixing bolts. The fixing seat is positioned by cooperating with the pipe body through the bottom groove. The gland is a symmetrical split structure and can be replaced according to the flange specification. An O-ring is arranged between the fixing seat and the gland to enhance the static sealing performance. During use, the pipeline to be measured is inserted into the fixing seat, then inserted into the gland and the O-ring laterally, and finally locked by the bolts to realize quick pressure measurement of different specifications of flange joints. The tool is convenient to install, has strong adaptability, reliable sealing and good universality, is suitable for quick detection and online batch pressure measurement in the production site of high-pressure hydraulic pipelines, can effectively improve the pressure measurement efficiency and consistency, and reduce the labor burden and maintenance cost. The utility model has simple structure and low cost, has wide popularization value in the field of hydraulic pipelines, and has remarkable good economic and social benefits.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic pipeline system testing devices, and in particular to a replaceable quick pressure testing fixture with a flange joint structure, used for sealing and strength testing of hydraulic pipeline assemblies after production. Background Technology

[0002] In hydraulic piping systems, flange joints are widely used in high-pressure piping assemblies due to their excellent pressure-bearing performance. During the production process, each hydraulic piping assembly needs to undergo pressure testing after production to ensure it is leak-free and reliably sealed, avoiding operational failures caused by manufacturing defects. Currently, commonly used pressure testing fixtures mainly employ fixed-specification flange clamps, achieving a seal through the flange sealing seat and gland in conjunction with an O-ring, and then connecting the pressure testing equipment after bolt tightening. However, this type of clamp has disadvantages such as long installation time, poor adaptability, and low efficiency.

[0003] Long installation time: Adjusting the position of the flange clamps and piping assemblies and tightening the bolts takes a lot of time, which affects the production cycle.

[0004] Poor adaptability: Flange joints of different specifications require glands or integral clamps of different sizes, making switching cumbersome;

[0005] Low efficiency: Pressure testing preparation and tooling change are time-consuming and manual operation is complicated, which can easily lead to assembly errors.

[0006] Therefore, there is an urgent need for a rapid pressure testing fixture with a replaceable gland structure to reduce the installation time before pressure testing and achieve efficient adaptation of flange joints of various specifications. Utility Model Content

[0007] To address the aforementioned technical problems, the purpose of this utility model is to provide a simple, quick-installation, and adaptable rapid pressure testing fixture for flange joints of various specifications. The technical solution is as follows:

[0008] To solve the above-mentioned technical problems, the present invention provides a replaceable quick pressure testing fixture with a flange joint structure, comprising:

[0009] A flange mounting base is used to accommodate and position the flange joint of the hydraulic pipeline assembly to be tested;

[0010] At least one pair of replaceable flange covers, designed according to the outer diameter of the flange joint, are detachably mounted on both sides of the flange mounting base and respectively press against the corresponding mating surfaces of the flange joint;

[0011] Multiple fixing bolts are inserted into the corresponding through holes of the flange cover and the flange fixing seat, and the flange cover and the flange fixing seat are locked together by threaded engagement to form a sealed connection;

[0012] One or more O-rings are disposed between the flange mounting base and the flange gland to enhance the static sealing performance of the flange joint after compression.

[0013] The replaceable flange gland can quickly adapt to and pressure test multiple flange joints by replacing the gland assembly of different sizes, based on the different flange joint sizes.

[0014] Optionally, the flange cover is a symmetrical two-piece split structure, so as to allow for lateral installation or removal without disassembling the pipeline.

[0015] Optionally, the size and shape of the replaceable flange gland are designed and processed according to the three-dimensional drawing of the flange joint to be tested, so as to ensure that the pressing surface fits the flange joint surface.

[0016] Optionally, the bottom of the flange mounting base is provided with a groove that matches the outer diameter of the hydraulic pipeline body, which is used to assist in positioning the pipeline assembly and restrict axial and radial movement.

[0017] Optionally, the screw end of the fixing bolt is threaded into the screw hole of the flange fixing seat, and the nut end is threaded into the corresponding screw hole of the flange cover, thus completing the locking in the form of a nut and screw.

[0018] Optionally, the O-ring is placed between the contact surfaces of the flange mounting base and the flange gland, and the gland is pressed to form a seal after being locked.

[0019] Optionally, the replaceable flange cover and the flange fixing seat are locked synchronously by multiple bolts, and the single loading and unloading operation time does not exceed 30 seconds.

[0020] Optionally, the tooling can provide multiple sets of replaceable flange gland assemblies with different inner diameters to adapt to hydraulic pipeline flange assemblies with outer diameters ranging from 20mm to 100mm.

[0021] The beneficial effects of this utility model's technical solution are:

[0022] This utility model's replaceable quick-release pressure testing fixture for flange joints allows for rapid installation. Through the combination of a split gland and quick-locking bolts, a single installation / removal time does not exceed 30 seconds. It also boasts strong adaptability, with the replaceable gland assembly covering flange outer diameters from 20 to 100 mm without requiring replacement of the mounting base. Furthermore, it provides reliable sealing, with the O-ring pressure gap being less than 0.2 mm, ensuring static sealing performance during high-pressure testing. Finally, the process is simple, with few parts, an intuitive structure, and low processing and maintenance costs. Attached Figure Description

[0023] Figure 1This is a schematic diagram of the installation of the replaceable quick pressure testing tool and conversion connector of the flange joint structure in this embodiment of the present invention;

[0024] Figure 2 for Figure 2 Side view;

[0025] Figure 3 This is a schematic diagram of the installation of the flange fixing seat and the flange cover in an embodiment of this utility model;

[0026] Figure 4 This is a perspective view of the flange cover in an embodiment of this utility model;

[0027] Figure 5 This is a perspective view of the flange fixing seat in an embodiment of this utility model. Detailed implementation method:

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0029] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] Please see Figure 1 , Figure 2 and Figure 3 The diagram illustrates a replaceable quick pressure testing fixture with a flange joint structure according to one embodiment. It includes a flange mounting base 1 for accommodating and positioning the flange joint 100 of the hydraulic pipeline assembly to be tested; at least one pair of replaceable flange covers 2, designed according to the outer diameter of the flange joint 100, detachably mounted on both sides of the flange mounting base 1, respectively pressing the corresponding mating surfaces of the flange joint 100; multiple fixing bolts 3, passing through corresponding through holes (threaded in the through holes) of the flange covers 2 and the flange mounting base 1, locking the flange covers 2 and the flange mounting base 1 together through threaded engagement to form a sealed connection; one or more O-rings (not shown), disposed between the flange mounting base 1 and the flange covers 2 to enhance the static sealing performance of the flange joint 100 after compression; the replaceable flange covers 2 can achieve rapid adaptation and pressure testing operations for multiple flange joint specifications by replacing different sized cover assemblies (two flange covers form a cover assembly) based on the size of different flange joints.

[0034] In this embodiment, the flange cover 2 is a symmetrical two-piece split structure, which allows for lateral installation or removal without disassembling the pipeline.

[0035] In this embodiment, the size and shape of the replaceable flange cover 2 are designed and processed according to the three-dimensional solid drawing of the flange joint to be tested, so as to ensure that the pressing surface fits the flange joint surface.

[0036] In this embodiment, the bottom of the flange fixing seat 1 is provided with a groove (not shown) that matches the outer diameter of the hydraulic pipeline, which is used to assist in positioning the pipeline assembly and restrict axial and radial movement.

[0037] In this embodiment, the screw end of the fixing bolt 3 is connected to the screw hole of the flange fixing seat 1 (i.e., Figure 5 As shown in Figure 11, the nut end corresponds to the threaded hole of the flange cover 2 (i.e., Figure 4 As shown in Figure 22, the threaded fit is used to lock the screw in the form of a nut and screw.

[0038] In this embodiment, the O-ring is placed between the contact surfaces of the flange mounting base and the flange gland, and the gland is sealed under pressure after being locked.

[0039] In this embodiment, the replaceable flange cover and the flange fixing seat are locked synchronously by multiple bolts, and the single loading and unloading operation time does not exceed 30 seconds.

[0040] In this embodiment, the tooling can provide multiple sets of replaceable flange gland assemblies with different inner diameters to adapt to hydraulic pipeline flange joint assemblies with outer diameters ranging from 20mm to 100mm.

[0041] The following description will further illustrate the characteristics and functions of this utility model.

[0042] See Figure 1 As shown in the figure, a replaceable quick pressure testing fixture with a flange joint structure in this embodiment includes a flange mounting base 1, a flange gland 2, fixing bolts 3, and an O-ring. The flange mounting base 1 is made of high-strength aluminum alloy and has an annular groove at the bottom to fit tightly with the outer surface of the hydraulic pipeline. Several bolt holes are evenly distributed on the side wall of the flange mounting base 1, and the center line of the bolt holes is coaxial with the groove.

[0043] The flange gland 2 is a split structure, consisting of two pieces, left and right, made of engineering plastic or aluminum alloy. Each gland piece matches the outer surface of the flange joint, and its inner surface is a pressing surface 21 that fits against the flange face. Both ends of the gland 2 have through holes 22 corresponding to the bolt holes of the flange mounting base 1.

[0044] The O-ring is placed in the annular groove (not shown) between the gland 2 and the fixing seat 1. After the gland is in place, the sealing and tightening can be completed by inserting the fixing bolt 3 into the through hole 22 and threading it into the screw hole 11 of the fixing seat 1, and then tightening the nut. In practice, a quick-tightening bolt 3 with a handle knob can be used to achieve tool-free assembly and disassembly.

[0045] In this embodiment, the dimensions of the flange gland 2 are designed to correspond to the inner diameter (D+Δ) of the flange joint's outer diameter D, with a machining accuracy of ±0.1mm, to ensure uniform pressure on the sealing ring after compression. Testing showed no leakage when the pipeline system pressure was 120MPa; the on-site assembly / disassembly time was ≤25s.

[0046] To accommodate more specifications, this embodiment provides a set of six different sizes of gland assemblies, covering six commonly used flange outer diameters: 20mm, 30mm, 40mm, 50mm, 75mm, and 100mm. Users only need to replace the corresponding gland assembly next to the flange mounting base 1 to begin pressure testing.

[0047] To ensure safety during manual operation, a spring-loaded locating pin (not shown) is added between the flange cover 2 and the fixed base 1. One end of the locating pin is fixed to the fixed base 1, and the other end can pop out into the pin hole of the cover 2. During assembly, after the cover 2 is in place and slightly pressed to the side, the locating pin automatically pops out and engages with the pin hole, ensuring that the coaxiality error of the cover 2 is ≤0.2mm. During disassembly, the pin body must be pressed down before loosening the bolt 3, improving operational safety.

[0048] Those skilled in the art should understand that equivalent substitutions and improvements can be made without departing from the spirit and scope of this utility model, for example:

[0049] The fixing bolt 3 can be a snap-on screw or a quick-connect snap ring structure.

[0050] The flange mounting base 1 and the gland 2 can be made of stainless steel or fiberglass reinforced plastic.

[0051] O-rings can also be replaced with other elastic seals.

[0052] The surface of the cap 2 can be enhanced with anti-slip texture or markings to facilitate on-site operation.

[0053] In summary, the replaceable quick-release pressure testing fixture of this utility model with flange joint structure enables rapid installation. Through the combination of a split gland and quick-locking bolts, the single installation and disassembly time does not exceed 30 seconds. Furthermore, it has strong adaptability, with the replaceable gland assembly covering various flange outer diameters from 20 to 100 mm, eliminating the need to replace the fixing seat. Simultaneously, it provides reliable sealing, with the O-ring pressure gap being less than 0.2 mm, ensuring static sealing performance during high-pressure testing. Finally, the process is simple, with few parts, an intuitive structure, and low processing and maintenance costs.

[0054] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A replaceable quick pressure testing fixture with a flange joint structure, characterized in that, include: A flange mounting base is used to accommodate and position the flange joint of the hydraulic pipeline assembly to be tested; At least one pair of replaceable flange covers, designed according to the outer diameter of the flange joint, are detachably mounted on both sides of the flange mounting base and respectively press against the corresponding mating surfaces of the flange joint; Multiple fixing bolts are inserted into the corresponding through holes of the flange cover and the flange fixing seat, and the flange cover and the flange fixing seat are locked together by threaded engagement to form a sealed connection; One or more O-rings are disposed between the flange mounting base and the flange gland to enhance the static sealing performance of the flange joint after compression. The replaceable flange gland can quickly adapt to and pressure test multiple flange joints by replacing the gland assembly of different sizes, based on the different flange joint sizes.

2. The tooling according to claim 1, characterized in that, The flange cover is a symmetrical two-piece split structure, which allows for lateral installation or removal without disassembling the pipeline.

3. The tooling according to claim 1, characterized in that, The dimensions and shape of the replaceable flange cover are designed and manufactured based on the three-dimensional drawings of the flange joint to be tested, to ensure that the pressing surface fits the flange joint surface.

4. The tooling according to claim 1, characterized in that, The bottom of the flange mounting base is provided with a groove that matches the outer diameter of the hydraulic pipeline, which is used to assist in positioning the pipeline assembly and restrict axial and radial movement.

5. The tooling according to claim 1, characterized in that, The screw end of the fixing bolt is threaded into the screw hole of the flange fixing seat, and the nut end is threaded into the corresponding screw hole of the flange cover, thus completing the locking in the form of a nut and screw.

6. The tooling according to claim 1, characterized in that, The O-ring is placed between the contact surfaces of the flange fixing seat and the flange gland, and a seal is formed under pressure after the gland is locked.

7. The tooling according to claim 1, characterized in that, The replaceable flange cover and the flange fixing seat are locked synchronously by multiple bolts, and the single loading and unloading operation time does not exceed 30 seconds.

8. The tooling according to claim 1, characterized in that, The tooling can provide multiple sets of replaceable flange gland assemblies with different inner diameters to adapt to hydraulic pipeline flange assemblies with outer diameters ranging from 20mm to 100mm.

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