Water pressure loading tool

Abstract

The invention discloses a water pressure loading tool which comprises a lower base and an upper cover plate, the peripheral edge part of the lower base is step-shaped and is gradually lowered inwards, and the middle part of the lower base is provided with a through hole which is used for placing a skin test piece; the upper cover plate is fastened on the upper surface of the lower base, the peripheral edge of the upper cover plate is flat-plate-shaped, a vertical water injection measuring cylinder with scales is arranged in the center of the upper cover plate and is used for pressurizing a skin test piece, and the test pressure is controlled by controlling the water adding height; the sealing performance among the upper cover plate, the skin test piece and the lower base is ensured through a sealing design, and the lower base is also provided with a drain valve for draining liquid in the water pressure loading tool. The pressure loading tool can be repeatedly used, is easy to mount and dismount, is simple in operation flow, is accurate and controllable in pressurization process, and is high in universality for a test piece with a flat surface. Time and manpower can be saved, and the test precision can be improved.

Description

Technical Field

[0001] The invention relates to the field of pressure testing, in particular to a water pressure loading tool. Background Art

[0002] Pressure test is a common test for verifying skin parts. Common pressurization methods include adding weights, designing tooling, and using a pressure head for pressurization. However, when facing large-scale skin parts, the heavy object pressurization method often uses sandbags and counterweights. The number of sandbags and counterweights required is large, and the transportation and loading process requires manual handling, which is difficult to prepare quickly and easily affects life safety; when stacking heavy objects, it is often difficult to achieve uniform loading, and the skin parts are easily damaged locally. The operation is difficult and the load is not applied accurately; the pressure head has a small pressurization area, which has limitations for pressurizing large-scale flat skin parts. Summary of the invention

[0003] The technical problem solved by the present invention is: to overcome the deficiencies of the prior art and provide a water pressure loading tooling to achieve uniform pressure loading with simple operation, simple structure, accurate loading, less resource consumption and higher safety.

[0004] The technical solution of the present invention is: a water pressure loading tooling, including a lower base and an upper cover plate, the peripheral edge portion of the lower base is stepped, gradually descending inward, and the middle portion is a through hole for placing a skin test piece; the upper cover plate is fastened to the upper surface of the lower base, the peripheral edge portion is flat, and a vertical water-filled measuring cylinder with a scale is arranged at the center position, which is used to pressurize the skin test piece, and the test pressure is controlled by controlling the water addition height; the sealing between the upper cover plate, the skin test piece and the lower base is ensured by a sealing design, and a drain valve is also arranged on the lower base for discharging the liquid in the water pressure loading tooling.

[0005] Furthermore, the lower base is in the shape of two steps, including an upper step outside and a lower step inside. A double-layer sealing groove is opened on the lower step, and a sealing strip is placed inside. After the skin test piece is placed, the test piece overlaps the position of the lower step to limit the displacement of the test piece. The upper cover plate is fastened to the upper step to press the sealing strip to ensure the sealing of the water pressure loading tooling.

[0006] Furthermore, a drainage valve is arranged on the upper stepped side wall of the lower base. After the test is completed, the valve is opened to drain the liquid in the tooling.

[0007] Furthermore, positioning pins are arranged at diagonal positions of the upper step of the lower base, and positioning holes are correspondingly arranged on the upper cover plate, which are used for alignment and positioning before the upper cover plate is fastened to the lower base.

[0008] Furthermore, the flat plate around the edge of the upper cover plate is fastened to the upper step of the lower base.

[0009] Furthermore, a square through hole is opened in the middle of the lower base.

[0010] Furthermore, the water filling measuring cylinder at the center of the upper cover plate has an inverted funnel-shaped lower portion to facilitate the discharge of gas in the cavity during water filling; and the upper portion is a hollow cylinder with water filling height scales engraved on the cylinder.

[0011] Furthermore, the upper cover plate and the lower base are fixed by bolts and nuts.

[0012] The advantages of the present invention compared with the prior art are:

[0013] The present invention provides installation space and good sealing for the test piece through a stepped lower base design, controls the surface load applied to flat parts such as skin parts through the scale on the graduated water injection cylinder, and converts the water injection height using the hydrostatic pressure formula, which is simple and easy to operate.

[0014] The pressure loading tool is reusable, easy to install and disassemble, has a simple operation process, and the pressurization process is accurate and controllable. It is highly versatile for test pieces with flat surfaces. Using this tool can save time and manpower and improve the accuracy of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The structure of the embodiment of the present invention is shown in FIG. Figure 1 ;

[0016] Figure 2 The structure of the embodiment of the present invention is shown in FIG. Figure 2 ;

[0017] Figure 3 It is a schematic diagram of a structural cross-section in an embodiment of the present invention. DETAILED DESCRIPTION

[0018] In order to better understand the technical solution of the present invention, the specific implementation mode of the present invention is described in detail below with reference to the accompanying drawings.

[0019] The core idea of ​​the present invention is to provide a high-precision, multi-scenario matching, and easy-to-operate pressure loading tool, which has solved the problems of limitations of existing loading methods and tools, low precision, and time-consuming and labor-intensive operation processes.

[0020] like Figure 1 and 2 As shown, this embodiment includes a lower base 1, a drain valve 2, fixing bolts 3, a graduated water-filling measuring cylinder 4, a sealing groove 5, an upper cover plate 6, a skin-coated frame member 7 and a positioning pin 8.

[0021] The lower base 1 is designed as a step-shaped, hollow interior, and is used to place the skin test piece. The steps of the lower base 1 are provided with sealing grooves for sealing the upper cover plate and the test piece; the upper cover plate 6 is aligned with the lower base 1 through the positioning holes, and the upper cover plate and the lower base are fixed with bolts and nuts. The lower base is provided with a double-layer sealing groove, and a sealing strip is placed inside, which ensures the sealing between the upper cover plate and the lower base when pressed tightly.

[0022] Specifically, Figure 3 As shown, the lower base 1 is in the shape of two steps, with a square through hole in the middle, and a double-layer sealing groove 5 is opened on the lower step. The lower step is used to place the skin test piece and limit the displacement of the test piece. When the upper cover plate 6 is fixed to the upper step, the sealing strip is pressed to ensure the sealing of the water pressure loading tooling. The side wall of the upper step of the lower base is arranged with a drain valve 2. After the test is completed, the valve is opened to drain the liquid in the container. A cylindrical positioning pin 8 is arranged at the diagonal position of the upper step of the lower base, which is used to position the upper cover plate and the lower base. The edge of the upper cover plate is flat and used to dock with the lower base. The center position is a vertical graduated water injection cylinder 4 for testing water addition and controlling the pressurization pressure. The lower part of the graduated water injection cylinder 4 is in the shape of an inverted funnel, which is convenient for the gas in the cavity to be discharged during water injection; the upper part is a hollow cylinder with a water addition height scale engraved on the cylinder. By controlling the water addition height, the test pressure can be accurately controlled.

[0023] The application scenario of the embodiment of the present invention is to verify the pressure-bearing capacity of the skin applied on the frame. During the specific implementation, the frame member 7 for applying the skin is placed into the central opening hole of the lower base 1, and the extended flange of the frame is overlapped on the lower step surface of the lower base 1, and is fixed to the lower step surface of the lower base 1 by bolts 3. A sealing strip is placed in the sealing groove 5 on the lower step surface of the lower base 1, so that the frame 7 and the lower base 1 are sealed when tightened by bolts 3.

[0024] In order to achieve multi-scenario matching of the pressurized test, the present invention can place frame test pieces with skins in different shapes (including but not limited to circular, square, pentagonal, hexagonal, etc.) at the middle through hole of the lower base 1.

[0025] After the lower base 1 and the frame 7 are fastened and sealed, the upper cover 6 is aligned with the positioning pins 8 on the lower base 1 and fastened with bolts 3. The sealing groove 5 on the lower base 1 is responsible for completing the sealing connection between the upper cover 6 and the lower base 1.

[0026] Before the test of the present invention, water is added into the inner part through the graduated water filling cylinder 4. When adding water, the water pipe is extended into the position of the skin part as far as possible to prevent the impact load caused by the height difference when the water is initially filled.

[0027] The present invention controls the surface load applied to a flat part such as a skin part by means of the scale on the graduated water injection measuring cylinder 4, and converts the water injection height by means of the hydrostatic pressure formula, which is simple and easy to operate.

[0028] After the test, open the drain valve 2, and after the liquid is drained, close the drain valve, unscrew the fixing bolts of the upper cover plate 6 and the lower base plate 1, and remove the upper cover plate 6; unscrew the fixing bolts of the skin frame 7 and the lower base 1, and take out the test piece; the tooling is removed.

[0029] The pressure loading tool is reusable, easy to install and disassemble, has a simple operation process, and the pressurization process is accurate and controllable. It is highly versatile for test pieces with flat surfaces. Using this tool can save time and manpower and improve the accuracy of the test.

[0030] It is to be understood that the present invention is described by way of embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and embodiments that can fall within the scope of the claims of this application all fall within the scope protected by the present invention.

[0031] The contents not described in detail in the specification of the present invention belong to the common knowledge of those skilled in the art.

Claims

1. A hydraulic loading tool, characterized in that: It includes a lower base and an upper cover plate. The peripheral edge of the lower base is stepped and gradually descends inward. The middle part is a through hole for placing the skin test piece. The upper cover plate is fastened to the upper surface of the lower base. The peripheral edge is flat. A vertical water-filled measuring cylinder with a scale is arranged at the center to pressurize the skin test piece. The test pressure is controlled by controlling the water-filled height. The sealing between the upper cover plate, the skin test piece and the lower base is ensured by a sealing design. A drain valve is also arranged on the lower base to discharge the liquid in the water pressure loading tooling.

2. The hydraulic loading tool according to claim 1, characterized in that: The lower base is in the shape of two steps, including an upper step outside and a lower step inside. A double-layer sealing groove is opened on the lower step, and a sealing strip is placed inside. After the skin test piece is placed, the test piece overlaps the position of the lower step to limit the displacement of the test piece. The upper cover plate is fastened to the upper step to press the sealing strip to ensure the sealing of the water pressure loading tooling.

3. The hydraulic loading tool according to claim 2, characterized in that: A drainage valve is arranged on the upper stepped side wall of the lower base. After the test is completed, the valve is opened to drain the liquid in the tooling.

4. The hydraulic loading tool according to claim 2, characterized in that: Positioning pins are arranged at diagonal positions of the upper step of the lower base, and positioning holes are correspondingly arranged on the upper cover plate for alignment and positioning before the upper cover plate and the lower base are fastened together.

5. The hydraulic loading tool according to claim 2, characterized in that: The flat plate shape around the edge of the upper cover plate is fastened to the upper step of the lower base.

6. The hydraulic loading tool according to claim 1, characterized in that: A square through hole is provided in the middle of the lower base.

7. The hydraulic loading tool according to claim 1, characterized in that: The water injection measuring cylinder at the center of the upper cover plate has an inverted funnel shape at the bottom to facilitate the discharge of gas in the cavity during water injection; The upper part is a hollow cylinder with water height scale engraved on it.

8. The hydraulic loading tool according to claim 1, characterized in that: The upper cover plate and the lower base are fixed by bolts and nuts.

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