Concrete pipeline test device and pressure test method

Abstract

The invention discloses a concrete pipeline testing device and a pressure testing method.The concrete pipeline testing device comprises a base and a top seat, a supporting seat is fixedly installed on the upper side of the base, an arc-shaped pit is formed in the upper side of the supporting seat and used for containing a concrete pipeline, the top seat is located on the upper side of the base, and the lower side of a pressing plate is installed on the top seat through a hydraulic rod; the pressing plate is positioned right above the supporting seat, and a pressing test can be performed above the concrete pipeline through the pressing plate; the device comprises a concrete pipeline and further comprises two supporting frames, the supporting frames are located at the two ends of the concrete pipeline, a center cylinder is installed between the two supporting frames and extends into the middle of an inner cavity of the concrete pipeline, and a pressure bag is installed between the outer periphery of the center cylinder and the inner periphery of the concrete pipeline and used for supporting the concrete pipeline from the inner periphery of the concrete pipeline. According to the invention, the test condition in the actual use process of the concrete pipeline can be simulated.

Description

Technical Field

[0001] The present invention relates to testing equipment, more specifically, to a concrete pipe testing device and a concrete pipe pressure testing method. Background Art

[0002] The testing process of concrete pipes is usually divided into external pressure tests and internal pressure tests. The external pressure test uses equipment to test the concrete pipes to measure the bearing capacity, deformation characteristics and failure mode of the concrete pipes under the action of external pressure, so as to evaluate their structural safety and durability.

[0003] However, the current external pressure test of concrete pipes is usually carried out when the inner cavity of the pipe is unloaded, which cannot simulate the internal pressure environment of the actual use state and cannot simulate the actual test state of the concrete pipe under the internal pressure condition.

[0004] Therefore, a new solution needs to be proposed to solve this problem. Summary of the Invention

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art and to provide a concrete pipe testing device and a pressure testing method.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A concrete pipe testing device includes a base and a top seat, wherein a support seat is fixedly installed on the upper side of the base, and an arc-shaped recess is formed on the upper side of the support seat for accommodating the concrete pipe. The top seat is located on the upper side of the base, and the lower side of the pressure plate is installed on the top seat through a hydraulic rod. The pressure plate is located directly above the support seat, and a pressure test can be performed above the concrete pipe through the pressure plate; it also includes two support frames, which are located at both ends of the concrete pipe, and a center tube is installed between the two support frames. The center tube extends into the middle of the inner cavity of the concrete pipe, and a pressure bag is installed between the outer periphery of the center tube and the inner periphery of the concrete pipe. The pressure bag is used to support from the inner periphery of the concrete pipe.

[0008] The present invention is further configured such that a guide rod is fixedly connected to the upper portion of the pressure plate, and the guide rod is slidably connected to the top seat for guiding the lifting and lowering of the pressure plate.

[0009] The present invention is further configured such that the pressure bag is connected to an external pressure liquid source via a pipeline, and the pressure bag can be expanded and deformed outwards by the liquid.

[0010] The present invention is further configured such that annular retaining rings are fixedly connected to both ends of the outer periphery of the central tube, and the annular retaining rings are used to form a barrier at both ends of the pressure bag.

[0011] The present invention is further configured such that the pressure bag is annular in structure and is sleeved on the outer circumference of the central tube, and the inner circumference of the concrete pipe can be supported by the expansion of the pressure bag.

[0012] The present invention is further configured such that a plurality of partitions are installed on the outer periphery of the central tube, each partition is in an annular distribution structure, and an accommodating space is formed between two adjacent partitions; a plurality of pressure bags are provided, and correspond one-to-one with the accommodating spaces, and the pressure bags are respectively embedded in the accommodating spaces, and can provide pressure support from the accommodating spaces toward the inner circumference of the concrete pipe.

[0013] The present invention is further configured such that the partition is provided with a gap formed between the outer periphery of the partition and the inner periphery of the concrete pipe.

[0014] The present invention is further configured such that each pressure bag is connected to a branch pipe, each branch pipe is connected to a main pipe, and the main pipe is connected to an external pressure liquid source; each branch pipe is respectively installed with a valve device.

[0015] The present invention is further configured such that a support shaft is fixedly installed between the two support frames, the support shaft is located at the axis center of the concrete pipe and passes through the concrete pipe;

[0016] The present invention is further configured such that a center hole is opened in the center of the central tube, the support shaft passes through the center hole, and stoppers are fixedly connected to the outside of the support shaft at both ends corresponding to the center tube, so that the center tube and the support shaft can be limited by the stoppers;

[0017] The present invention is further configured such that both ends of the support shaft are fixedly mounted on support frames, the bottom of the support frame is slidably mounted on the base via a slide rail, and the two support frames can be adjusted along the axial direction of the concrete pipe.

[0018] The present invention also provides a pressure test method for a concrete pipe, which can perform a pressure test on a concrete pipe by using the concrete pipe test device as described above;

[0019] During the test, the concrete pipe is placed horizontally on the support base, and the lower side of the concrete pipe is embedded in the arc-shaped depression installed on the base. Liquid is injected into the pressure bag to pressurize the inner cavity of the pressure bag. The pressure of the pressure bag simulates the internal pressure of the concrete pipe, which can more realistically simulate the pressure test under the condition of internal pressure during the use of the pipe.

[0020] Then, the pressure plate is driven downward by the hydraulic rod so that the upper side of the pressure plate can press against the upper side of the concrete pipe, gradually increasing the downward pressure of the hydraulic rod to simulate the external pressure test of the concrete pipe.

[0021] In summary, the present invention has the following beneficial effects:

[0022] A pressure bladder is installed between the outer perimeter of the central tube and the inner perimeter of the concrete pipe. Connected to an external pressure liquid source via a pipe, the bladder expands and deforms outwards through the liquid, providing support from the inner perimeter of the concrete pipe. The pressure bladder exerts pressure on the inner perimeter of the concrete pipe, simulating the internal pressure of the concrete pipe during actual use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a three-dimensional diagram of a concrete pipe testing device in Example 1;

[0024] Figure 2 It is a front view of a concrete pipe testing device in Example 1;

[0025] Figure 3 is a cross-sectional view of a concrete pipe testing device in Example 1;

[0026] Figure 4 This is a transverse cross-sectional view of a concrete pipe testing device in Example 1;

[0027] Figure 5 This is a transverse cross-sectional view of a concrete pipe testing device in Example 3;

[0028] Figure 6 This is a schematic structural diagram of the central tube and partition of Example 3;

[0029] Figure 7 is a cross-sectional view of each pressure bag in Example 3;

[0030] Figure 8 This is a schematic diagram of the connection structure of the pressure bag in Example 3;

[0031] Figure 9 This is a schematic structural diagram of the second test mode in Example 3;

[0032] Figure 10 This is a schematic diagram of the first structure of the third test mode in Example 3;

[0033] Figure 11 This is a schematic diagram of the second structure of the third test mode in Example 3.

[0034] Figure numerals: Figure numerals: concrete pipe 100; middle unloaded section 101; base 1; support seat 2; top seat 3; pressure plate 4; hydraulic rod 5; guide rod 6; support frame 7; slide rail 8; support shaft 9; center tube 10; annular retaining ring 101; pressure bag 11; partition 12; accommodating space 13; center hole 14; block 15; main pipe 16; branch pipe 161; valve device 162. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0036] Example 1

[0037] This embodiment discloses a concrete pipe testing device, referring to Figures 1-4 As shown, it includes a base 1 and a top seat 3, which can serve as support on the upper and lower sides; a support seat 2 is fixedly installed on the upper side of the base 1, and an arc-shaped recess is formed on the upper side of the support seat 2.

[0038] The arc-shaped recess on the upper side of the support base 2 is adapted to the outer diameter of the concrete pipe 100 , and the concrete pipe 100 can be accommodated and placed on the support base 2 to support the concrete pipe 100 .

[0039] Top seat 3 is located above base 1, providing support for the entire assembly. A pressure plate 4 is attached to top seat 3 via a hydraulic rod 5 on its underside. Pressure plate 4 is located directly above support seat 2. The hydraulic rod 5's lifting and lowering motion adjusts pressure plate 4 upward and downward. During this downward movement, the hydraulic rod 5 applies pressure to the concrete pipe 100 through the pressure plate 4. A pressure detection device is installed at the connection between the hydraulic rod 5 and pressure plate 4 to measure the pressure applied by the hydraulic rod 5 to the pressure plate 4.

[0040] In order to maintain the lifting stability of the pressure plate 4, a guide rod 6 can be fixedly connected to the upper part of the pressure plate 4, and the guide rod 6 is slidably connected to the top seat 3. The lifting action of the pressure plate 4 can be guided by the guide rod 6 to maintain the lifting stability of the pressure plate 4. The lifting guidance can be achieved through the guide rod 6.

[0041] Two support frames 7 are also mounted on the base 1. These support frames 7 are located at either end of the concrete pipe 100, providing support. A support shaft 9 is fixedly mounted between the two support frames 7. The support shaft 9 is located at the axial center of the concrete pipe 100 and extends through the concrete pipe 100. A central tube 10 is mounted between the two support frames 7 and extends into the center of the inner cavity of the concrete pipe 100.

[0042] A center hole 14 is formed in the center of the center tube 10. When the center tube 10 is installed, the support shaft 9 passes through the center hole 14 to support the center tube 10. In addition, stoppers 15 are fixedly connected to the outside of the support shaft 9 at both ends of the center tube 10. The stoppers 15 can be positioned outside the support shaft 9. The stoppers 15 can limit the position of the center tube 10 and the support shaft 9 to maintain the axial position stability of the center tube 10 and enable rotation adjustment around the support shaft 9.

[0043] Support frames 7 are fixedly mounted at both ends of support shaft 9. Two slide rails 8 are mounted on base 1, running parallel to the axial direction of support shaft 9. The bottoms of support frames 7 are slidably mounted to base 1 via slide rails 8, allowing the two support frames 7 to be adjusted along the axial direction of concrete pipe 100. Once the support frames 7 have been adjusted, they can be locked in place with bolts to maintain the stability of central tube 10.

[0044] The outer circumference of the central tube 10 is smaller than the inner circumference of the concrete pipe 100. After the central tube 10 is installed on the inner circumference of the concrete pipe 100, a certain gap will be formed on the inner circumference of the concrete pipe 100.

[0045] A pressure bladder 11 is installed between the outer periphery of the central tube 10 and the inner periphery of the concrete pipe 100. This bladder 11 is connected to an external pressure liquid source via a pipe. The liquid causes the bladder 11 to expand and deform outward, providing support from the inner periphery of the concrete pipe 100. The pressure bladder 11 exerts pressure on the inner periphery of the concrete pipe 100, simulating the internal pressure of the concrete pipe 100 during actual use.

[0046] Furthermore, annular retaining rings 101 are fixedly connected to both ends of the outer periphery of the central tube 10. The annular retaining rings 101 can form a barrier at both ends of the pressure bag 11 to prevent the pressure bag 11 from expanding in the direction of both ends during the stamping and expansion process, so that the pressure of the pressure bag 11 can be applied toward the outer periphery, which can support and limit the concrete pipe 100.

[0047] This embodiment also discloses a pressure test method for a concrete pipe. The concrete pipe test device described above can be used to perform a pressure test on the concrete pipe 100.

[0048] During the test, the concrete pipe 100 is placed horizontally on the support base 2, and the lower side of the concrete pipe 100 is embedded in the arc-shaped recess installed on the base 1; liquid is injected into the pressure bag 11 to pressurize the inner cavity of the pressure bag 11. The pressure of the pressure bag 11 simulates the internal pressure of the concrete pipe 100, which can more realistically simulate the pressure test under the condition of internal pressure during the use of the pipe;

[0049] Then, the pressure plate 4 is driven downward by the hydraulic rod 5 so that the upper side of the pressure plate 4 can press against the upper side of the concrete pipe 100 , and the downward pressure of the hydraulic rod 5 is gradually increased to simulate the external pressure test of the concrete pipe 100 .

[0050] Example 2

[0051] This embodiment discloses a concrete pipe testing device. Figure 3 、 Figure 4 Provide detailed explanation.

[0052] In this embodiment, the pressure bladder 11 is annular and is positioned around the outer periphery of the central tube 10. The pressure bladder 11 expands to provide support for the inner periphery of the concrete pipe 100. When the pressure bladder 11 expands outward during punching, it provides a stable pressure support against the inner periphery of the concrete pipe 100, thereby maintaining the stability of the support provided to the concrete pipe 100.

[0053] Example 3

[0054] This embodiment discloses a concrete pipe testing device. Figure 5-Figure 8 Provide detailed explanation.

[0055] A plurality of partitions 12 are installed on the outer periphery of the central tube 10. Each partition 12 is annularly distributed. For example, ten partitions 12 may be evenly arranged to divide the outer periphery of the central tube 10 into ten accommodating spaces 13. Specifically, an accommodating space 13 may be formed between two adjacent partitions 12.

[0056] In this embodiment, the pressure bladders 11 employ a split structure. Specifically, multiple pressure bladders 11 are provided, each corresponding to one of the accommodating spaces 13. The shapes of the pressure bladders 11 and accommodating spaces 13 complement each other, with each exhibiting a matching fan-shaped cross-section. Each pressure bladder 11 is embedded within each accommodating space 13, providing pressure support from the accommodating space 13 toward the inner circumference of the concrete pipe 100.

[0057] Ten baffles 12 are provided, and the outer perimeter of each baffle 12 is slightly smaller than the inner perimeter of the concrete pipe 100, leaving a certain gap between the outer perimeter of each baffle 12 and the inner perimeter of the concrete pipe 100. This gap-shaped structure allows the central tube 10 to smoothly extend into the concrete pipe 100.

[0058] Reference Figure 8As shown, each pressure bag 11 is connected to a branch pipe 161, each branch pipe 161 is connected to the main pipe 16, and the main pipe 16 is connected to the external pressure liquid source. In addition, each branch pipe 161 is installed with a valve device 162, and each valve device 162 can be independently controlled.

[0059] By injecting hydraulic pressure into each pressure bladder 11, it forms multiple outward expansion points toward the periphery, providing stable support for the concrete pipe 100 and achieving a self-centering state. Furthermore, the inner periphery of the concrete pipe 100 is supported by multiple separate pressure bladders 11, enhancing the stability of the support. This not only provides support for the concrete pipe 100 but also simulates the effects of internal pressure during actual use, enabling a more realistic pressure test.

[0060] This embodiment also discloses a pressure test method for concrete pipes, referring to Figure 7 、 9 As shown in Figures 10 and 11, each pressure bag 11 can achieve pressure regulation separately.

[0061] During the concrete external pressure regulation process, three pressure test modes can be formed. In the first pressure test mode, hydraulic pressure is applied to all pressure bladders 11, and each valve device 162 is in an open state. The pressure bladders 11 are interconnected, which can roughly maintain pressure balance. The internal pressure of the pipeline can be generated on the inner periphery of the concrete pipe 100 through each pressure bladder 11, and the pressure resistance of the concrete pipe 100 can be achieved under the corresponding internal pressure. Moreover, buffering the pressure in the pipeline through hydraulic pressure can simulate the state of the liquid in the pipeline, improving the authenticity of the pipeline test.

[0062] In the second pressure test mode, refer to Figure 9As shown, three pressure bags 11 are pressurized, wherein the first pressure bag 11 is located in the middle of the upper part of the central tube 10, and the other two pressure bags 11 are located on both sides of the lower part of the central tube 10, and are symmetrical in structure. When the three pressure bags 11 are filled with pressure, a stable three-point support structure can be formed on the inner periphery of the concrete pipe 100. The two pressure bags 11 on the lower side can press the concrete pipe 100 downward, so that the concrete pipe 100 can press against the support seat 2 on the lower side to support each other, so that the concrete pipe 100 can be stably pressed onto the support seat 2, maintaining the stability of the concrete pipe 100 during the test process; and the pressure bag 11 in the middle of the upper side can resist the downward pressure of the pressure plate 4. By resisting the pressure of the upper pressure bag 11 and the pressure plate 4, the pressure balance of the upper pressure part of the concrete pipe 100 can be maintained in the initial stage, maintaining a stable state; then, maintain The pressure of the two lower pressure bags 11 remains unchanged, and the pressure of the upper pressure bag 11 is gradually reduced. As the pressure gradually decreases, the downward pressure of the pressure plate 4 will gradually become greater than the upward supporting pressure of the upper pressure bag 11, gradually forming a pressure effect on the upper side of the concrete pipe 100, forming a pressure test; as the upper pressure bag 11 is further reduced, the pressure of the pressure plate 4 on the upper side of the concrete pipe 100 can realize the pressure test under the condition of changing pressure difference between the inside and outside of the concrete pipe 100; as the upper pressure bag 11 is further reduced, the concrete pipe 100 may crack under the pressure of the pressure plate 4, and the limit parameters of the cracking condition of the concrete pipe 100 are obtained;

[0063] Through this second pressure test mode, the impact on the concrete pipe when the pressure plates 4 are pressed down can be avoided, and the inaccurate test caused by sudden pressure changes can be avoided; through this mode, the test situation under the slow change of pressure inside and outside the pipeline can be simulated.

[0064] In the third pressure test mode, refer to Figure 10 As shown in FIG11, during the test, six pressure bags 11 are pressurized, two of which are located at the upper side of the central tube 10, and a number of empty pressure bags 11 are spaced between the two pressure bags 11. The other four pressure bags 11 are located at the lower side of the central tube 10. The four pressure bags 11 are arranged continuously. Figure 10 The status is shown;

[0065] By simultaneously filling the six pressure bags 11 with hydraulic pressure, multiple support points can be formed on the inner circumference of the concrete pipe 100, which can provide stable support for the concrete pipe 100; an empty space is formed between the two upper pressure bags 11, so that the concrete pipe 100 corresponding to this position will form an intermediate unloaded section 101; by applying pressure to the upper side of the intermediate unloaded section 101 through the pressure plate 4, a three-point pressure test can be performed on the concrete pipe 100, that is, the two upper pressure bags 11 form an upward pressure, and the middle pressure plate 4 forms a downward pressure, so that three-point pressure can be applied to a local position of the intermediate unloaded section 101 of the concrete pipe 100, which can form a simulation test of this pressure state. When the concrete pipe 100 is in a complete circumference, an arc pressure test can be performed on the arc position of the concrete pipe 100, thereby improving the flexibility of the test. In addition, during the test, the pressure plate 4 can be loosened, and then the concrete pipe 100 and the central tube 10 in the middle can be rotated to deflect the positions of the two upper pressure bags 11, so that the position of the corresponding middle unloaded section 101 of the concrete pipe 100 will also change. In this way, during the three-point pressure test, the pressure plate 4 can be tested in different positions, thereby improving the flexibility of the test.

[0066] In addition, during the third test, the empty interval between the two upper pressure bags 11 can also be selected, so that the length of the corresponding intermediate unloaded section 101 can be adjusted, and the intermediate unloaded section 101 under different arc spans can be adjusted. During the test, pressure tests of the intermediate unloaded section 101 under different spans can be realized.

[0067] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A concrete pipe testing device, characterized in that: The invention comprises a base (1) and a top seat (3), wherein a support seat (2) is fixedly mounted on the upper side of the base (1), an arc-shaped recess is formed on the upper side of the support seat (2) for accommodating a concrete pipe (100), the top seat (3) is located on the upper side of the base (1), the lower side of the pressure plate (4) is mounted on the top seat (3) through a hydraulic rod (5), the pressure plate (4) is located directly above the support seat (2), and a pressure test can be performed above the concrete pipe (100) through the pressure plate (4); and further comprises two support frames (7), wherein the support frames (7) are located at both ends of the concrete pipe (100), a central tube (10) is mounted between the two support frames (7), the central tube (10) extends into the middle of the inner cavity of the concrete pipe (100), a pressure bag (11) is mounted between the outer periphery of the central tube (10) and the inner periphery of the concrete pipe (100), and the pressure bag (11) is used for supporting from the inner periphery of the concrete pipe (100).

2. The concrete pipe testing device according to claim 1, characterized in that: The upper portion of the pressure plate (4) is fixedly connected to a guide rod (6), and the guide rod (6) is slidably connected to the top seat (3) and is used to guide the lifting of the pressure plate (4).

3. The concrete pipe testing device according to claim 1, characterized in that: The pressure bag (11) is connected to an external pressure liquid source via a pipeline, and the liquid can cause the pressure bag (11) to expand and deform outward.

4. The concrete pipe testing device according to claim 3, characterized in that: Annular retaining rings (101) are fixedly connected to both ends of the outer periphery of the central tube (10), and the annular retaining rings (101) are used to form a barrier at both ends of the pressure bag (11).

5. The concrete pipe testing device according to claim 3, characterized in that: The pressure bag (11) is annular in structure and is sleeved on the outer periphery of the central tube (10). The pressure bag (11) is expanded to support the inner periphery of the concrete pipe (100).

6. The concrete pipe testing device according to claim 3, characterized in that: A plurality of partitions (12) are installed on the outer periphery of the central tube (10), each partition (12) is annularly distributed structure, and an accommodating space (13) is formed between two adjacent partitions (12); a plurality of pressure bags (11) are provided, and correspond one to one with the accommodating spaces (13), and the pressure bags (11) are respectively embedded in the accommodating spaces (13) and can press and support the inner periphery of the concrete pipe (100) from the accommodating space (13).

7. The concrete pipe testing device according to claim 6, characterized in that: The partitions (12) are provided in a number (10), and a gap is formed between the outer periphery of the partition (12) and the inner periphery of the concrete pipe (100).

8. The concrete pipe testing device according to claim 6, characterized in that: Each pressure bag (11) is connected to a branch pipe (161), each branch pipe (161) is connected to a main pipe (16), and the main pipe (16) is connected to an external pressure liquid source; each branch pipe (161) is respectively installed with a valve device (162).

9. The concrete pipe testing device according to claim 1, characterized in that: A support shaft (9) is fixedly installed between the two support frames (7), and the support shaft (9) is located at the axis center of the concrete pipe (100) and passes through the concrete pipe (100); The center of the central tube (10) is provided with a central hole (14), the support shaft (9) passes through the central hole (14), and the support shaft (9) is fixedly connected with stoppers (15) at both ends corresponding to the central tube (10), and the stoppers (15) can limit the position of the central tube (10) and the support shaft (9); The two ends of the support shaft (9) are respectively fixedly mounted on the support frame (7), and the bottom of the support frame (7) is slidably mounted on the base (1) via a slide rail (8). The two support frames (7) can be adjusted along the axial direction of the concrete pipe (100).

10. A pressure test method for a concrete pipe, characterized in that: By using the concrete pipe testing device according to any one of claims 1 to 9, a pressure test can be performed on a concrete pipe (100).

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