A water pressure testing device for expansion joints in a circulating water inlet corridor

Abstract

A kind of circulating water water inlet corridor expansion joint water pressure test device, including symmetrically arranged upper circular arc support body and lower circular arc support body and supplementary structure, tension spring, center shaft and jacking mechanism are arranged between the upper circular arc support body and the lower circular arc support body, during the use process of the present application, after device enters inside corridor, by its walking function, make device can relatively fast reach specified test expansion joint, still have jacking, sealing, rotation, telescopic function in the whole water pressure test process, guarantee the smooth progress of water pressure test, after water pressure test ends, by hydraulic jack pressure reduction, left and right support device dismantling, can move support device to next expansion joint and carry out water pressure test, greatly speed up water pressure test progress, reduce manpower resource investment, improve the operability of water pressure test process by the device, effectively shorten water pressure test period, reduce the restricting factor brought by expansion joint water pressure test.

Description

Technical Field

[0001] This invention relates to the field of engineering testing equipment technology, specifically to a water pressure testing device for expansion joints in circulating water inlet corridors. Background Technology

[0002] The circulating water corridor is a pressure corridor for circulating water from the circulating water pump house (9BPX) to the turbine generator building (1BMX), supplying circulating cooling water to the condenser in the conventional island. The circulating water corridor is a cast-in-place reinforced concrete structure made of polypropylene fiber reinforced concrete. The inlet corridor has a cross-section that is square on the outside and circular on the inside, with multiple sections and a diameter of 3.6m. A wide expansion joint is set between adjacent sections. In order to ensure the impermeability and watertightness of the corridor during operation, a water pressure test is required on the expansion joint after the corridor is poured. The original design required a water pressure test on the entire large-diameter concrete pipeline after completion. The overall water pressure test requires a large amount of water resources, which is difficult to construct and requires ensuring the integrity of the entire pipeline. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] The purpose of this invention is to provide a water pressure testing device for expansion joints in circulating water inlet corridors to solve the practical problems mentioned in the background art.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the present invention provides the following technical solution: a water pressure testing device for expansion joints of circulating water inlet corridors, comprising an upper arc support body and a lower arc support body symmetrically arranged, and supplementary structures. A tension spring, a central shaft, and a lifting mechanism are provided between the upper arc support body and the lower arc support body. The two ends of the tension spring are fixedly connected to the upper arc support body and the lower arc support body, respectively. The two ends of the central shaft are respectively sleeved inside the upper arc support body and the lower arc support body.

[0007] Furthermore, the central axis is fixedly connected to the support bracket at its middle position, and the support bracket is provided with sliding feet at both the front and rear ends.

[0008] Furthermore, the supplementary structure includes an arc-shaped block, the inner side of which is provided with multiple threaded supports, the multiple threaded supports being fixedly connected to the support bracket respectively.

[0009] Furthermore, the lifting mechanism includes multiple hydraulic jacks, the bottom end of which is connected to the lower arc support body, and the piston end is connected to the upper arc support body.

[0010] Furthermore, a pad is provided between the hydraulic jack and the upper arc support.

[0011] Furthermore, rubber waterstops are fitted on the outer sides of the upper arc support, the lower arc support, and the supplementary structure.

[0012] Furthermore, the rubber waterstop is provided with a water injection hole on its inner side.

[0013] (III) Beneficial Effects

[0014] During the use of this invention, after the device enters the corridor, its walking function allows it to reach the designated test expansion joint relatively quickly. Throughout the water pressure test, it also has jacking, sealing, rotation, and telescopic functions, ensuring the smooth progress of the water pressure test. After the water pressure test is completed, the pressure is reduced by hydraulic jacks and the left and right support devices are removed, allowing the support devices to be moved to the next expansion joint for water pressure testing. This greatly speeds up the water pressure test process, reduces manpower input, improves the operability of the water pressure test process, effectively shortens the water pressure test cycle, and reduces the constraints caused by water pressure testing at expansion joints. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a front view of the present invention;

[0017] Figure 2 This is an exploded view of the present invention;

[0018] Figure 3 This is a top view of the present invention;

[0019] Figure 4 This is a schematic diagram of the control of the hydraulic jack in Embodiment 1 of the present invention.

[0020] Legend:

[0021] 1-Support bracket, 2-Central shaft, 3-Upper arc support body, 4-Lower arc support body, 5-Pad plate, 6-Hydraulic jack, 7-Tension spring, 8-Arc block, 9-Threaded top support. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] As an embodiment 1 of the present invention, please refer to Figure 1-4 This invention provides a technical solution: a water pressure testing device for expansion joints in a circulating water inlet corridor, comprising an upper arc support 3 and a lower arc support 4 symmetrically arranged, and supplementary structures. A tension spring 7, a central shaft 2, and a lifting mechanism are provided between the upper arc support 3 and the lower arc support 4. The two ends of the tension spring 7 are fixedly connected to the upper arc support 3 and the lower arc support 4, respectively. The two ends of the central shaft 2 are respectively sleeved inside the upper arc support 3 and the lower arc support 4. The middle position of the central shaft 2 is fixedly connected to a support bracket 1. The frame 1 has sliding feet at both ends; the supplementary structure includes an arc-shaped block 8, and the inner side of the arc-shaped block 8 is provided with multiple threaded top supports 9, which are fixedly connected to the support bracket 1 respectively; the lifting mechanism includes multiple hydraulic jacks 6, the bottom end of the hydraulic jack 6 is connected to the lower arc support body 4, and the piston end is connected to the upper arc support body 3; a pad 5 is also provided between the hydraulic jack 6 and the upper arc support body 3; rubber waterstops are fitted on the outer sides of the upper arc support body 3, the lower arc support body 4, and the supplementary structure; water injection holes are provided on the inner side of the rubber waterstops.

[0024] The structure of this invention has the following functions:

[0025] Support and tightening function: The pad 5 is made of 20mm steel plate. Because the support surface has a circular cross-section, the hydraulic jack can only provide vertical support. Therefore, arc-shaped supports are set at the top and bottom of the support bracket. The arc of the arc support is the same as the cross-section of the corridor. Considering that the device needs to ensure balanced support force and synchronous lifting or retraction, and combined with the water pressure test pressure of 0.465MPa, a double-acting electric hydraulic pump with one to four hydraulic jacks is selected, with a jack tonnage of 30T. The upper arc support body 3 and the lower arc support body 4 support the bracket 1. The 30° space on both sides is supplemented by supplementary structures and threaded top supports 9.

[0026] Walking function: Each sliding foot of the support bracket 1 is equipped with two heavy-duty rollers. Two of the rollers on one sliding foot are set as omnidirectional wheels, and two of the rollers on the other sliding foot are set as directional wheels to facilitate changes in walking direction;

[0027] Telescopic function: A 160mm movable gap is maintained between the upper arc support body 3, the lower arc support body 4 and the support bracket 1, and they are not fixedly connected. The upper arc support body 3 and the lower arc support body 4 are suspended from the support bracket 1 by tension springs 7. In the working state, the upper arc support body 3 and the lower arc support body 4 are lifted by hydraulic jacks 6; in the non-working state, the hydraulic jacks 6 release pressure and the tension springs 7 retract, so that the upper arc support body 3 and the lower arc support body 4 retract along the central axis 2 and are in a suspended state, maintaining a movable gap with the corridor.

[0028] Rotation function: A central shaft 2 is set at the center of the support bracket 1, and a central bushing is set at the center of the upper arc support body 3 and the lower arc support body 4. The central bushing is sleeved with the central shaft 2, and the upper arc support body 3 and the lower arc support body 4 rotate around the central shaft 2 of the support bracket 1.

[0029] The specific working principle of this invention is as follows: 1. Treatment of the perimeter of expansion joints

[0030] Before installation, the concrete surface of the corridor expansion joint must be pre-treated. Latex, protrusions, and other debris on the concrete surface in contact with the rubber waterstop should be ground and cleaned with a grinder to ensure a smooth and even contact surface. After grinding, if there are any local depressions on the concrete surface, they should be smoothed with epoxy putty. If the concrete surface of the corridor is significantly deformed, cement mortar should be used to treat the contact area of ​​the rubber waterstop to ensure tight contact between the rubber waterstop and the concrete surface, forming a smooth and regular contact surface.

[0031] 2. Reverse support test device

[0032] Because the rubber waterstop is a complete circular ring, before the device enters the corridor, the rubber waterstop is first put on the walking support bracket 1 and reinforced simply.

[0033] After entering the corridor, the entire device can move along the track inside the corridor by being pushed and pulled by manpower through the support bracket 1, so that it can smoothly reach the test expansion joint position.

[0034] 3. Installation of the hydrostatic testing device

[0035] After the entire assembly is in place, the lower arc support 4 should be parallel to the expansion joint, and the upper arc support 3 should be perpendicular to the expansion joint, providing a working surface for the installation of the hydraulic jack 6. After the hydraulic jack 6 is installed, the upper arc support 3 is adjusted to be parallel to the expansion joint. A sealing rubber waterstop is then fitted over the outer sides of the upper arc support 3 and the lower arc support 4, installing the waterstop first vertically, then horizontally. Once the waterstop is in place, the hydraulic pump is started. The hydraulic jack 6 then lifts the upper arc support 3 and the lower arc support 4, allowing the installation of the supplementary structures on the left and right sides. The dimensions of the rubber waterstops on both sides are adjusted, and the supplementary structures are then tightened.

[0036] During the concrete pouring process, there may be dimensional deviations in the cross-section of the corridor, and the support device may also have deviations during processing, making it impossible to completely guarantee a standard arc surface. This requires the preparation of some steel shims to adjust the parts with slightly larger gaps, so that the waterstop and the concrete contact surface on both sides of the expansion joint can be evenly fitted.

[0037] After fine-tuning, continue to operate the electric hydraulic jack 6 to tighten the upper arc support 3 and lower arc support 4. Check again for gaps and weak points between the upper arc support 3, lower arc support 4, and the support bracket 1. If any are found, add steel shims at the corresponding locations. After inspection and correction, install the water injection system in place.

[0038] 4. After the water supply system for the water pressure test is installed, water is injected and pressurized between the expansion joint and the rubber waterstop through the water injection holes on the inside of the waterstop. During the pressurization process to the water pressure test value, as the pressure increases, the hydraulic jack 6 and threaded support 9 of the support device are continuously adjusted until the water pressure test sealing device of the expansion joint achieves a leak-proof effect. If there is no water seepage around the test area, but the water pressure value still cannot reach the test pressure value, it is necessary to check whether there is water seepage on the outside of the expansion joint. If water seepage is found, the water pressure test is suspended, and high-pressure grouting is performed on the expansion joint. After grouting, water is injected and pressurized at the expansion joint again using the original method. When the water pressure value reaches the test pressure value, water injection is stopped and the time is started. The pressure is maintained for 5 minutes. If the pressure value does not drop, the water pressure test is considered qualified, and the water pressure test of the expansion joint is completed.

[0039] After the water pressure test is completed, the hydraulic jack 6, the rubber waterstop and the support bracket 1 can be removed, and then the water pressure test device can be moved to the next expansion joint for water pressure test.

[0040] Various aspects of the invention are described in this disclosure with reference to the accompanying drawings, in which numerous illustrative embodiments are shown. The embodiments of this disclosure are not necessarily defined to include all aspects of the invention. It should be understood that the various concepts and embodiments described above, as well as those described in more detail below, can be implemented in any of many ways, because the concepts and embodiments disclosed herein are not limited to any particular implementation. Furthermore, some aspects of the invention disclosed may be used alone or in any suitable combination with other aspects of the invention disclosed.

[0041] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A water pressure test device for a circulating water intake gallery expansion joint, characterized by: The utility model provides a kind of lifting mechanism of supporting frame, including symmetrically arranged upper arc support body (3) and lower arc support body (4) and supplementary structure, and the center shaft (2) and jacking mechanism are equipped between the upper arc support body (3) and the lower arc support body (4), the both ends of the tension spring (7) are fixedly connected with the upper arc support body (3) and the lower arc support body (4), the both ends of the center shaft (2) are respectively sleeved in the inside of the upper arc support body (3) and the lower arc support body (4);The middle position of the center shaft (2) is fixedly connected with supporting bracket (1), and the front and rear ends of the supporting bracket (1) are provided with slide foot;Center shaft (2) is arranged in the center of supporting bracket (1), and the center of upper arc support body (3) and lower arc support body (4) is provided with center shaft sleeve, and center shaft sleeve is sleeved with center shaft (2), and upper arc support body (3) and lower arc support body (4) rotate with the center shaft (2) of supporting bracket (1) as the pivot; The supplementary structure includes arc block (8), and the inner side of the arc block (8) is provided with a plurality of threaded supports (9), and the threaded supports (9) are fixedly connected with the supporting bracket (1) respectively; The outer side of the upper arc support body (3) and the lower arc support body (4) and the supplementary structure is sleeved with rubber waterstop; In working condition, upper arc support body (3) and lower arc support body (4) are jacked by hydraulic jack (6) pressurization;In non-working condition, hydraulic jack (6) is decompressed, and tension spring (7) is contracted, so that upper arc support body (3) and lower arc support body (4) are retracted along center shaft (2) and are in suspended state, and movable gap is kept with corridor.

2. The water pressure test device for the expansion joint of the water inlet gallery of the circulating water according to claim 1, characterized in that: The jacking mechanism includes a plurality of hydraulic jacks (6), the bottom end of the hydraulic jack (6) is connected with the lower arc support body (4), and the piston end is connected with the upper arc support body (3).

3. The water pressure test device for the expansion joint of the water inlet gallery of the circulating water according to claim 2, characterized in that: The hydraulic jack (6) and the upper arc support body (3) are further provided with a backing plate (5).

4. The water pressure test device for the expansion joint of the water inlet gallery of the circulating water according to claim 1, characterized in that: The inner side of the rubber waterstop is provided with a water injection hole.

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