Pipe gallery cable support in-situ load test device
By installing dial indicators at both ends of the cable support in the tunnel and using rigid gaskets, the problem of support deformation affecting the accuracy of test data was solved, and more accurate load test data collection and cost control were achieved.
Patent Information
- Application Number
- CN202422731762.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-08
- Publication Date
- 2025-10-10
- Estimated Expiration
- 2034-11-08
AI Technical Summary
During the in-situ load test of cable supports in pipe corridors, the deformation of the connection ends between the test supports and the corridor wall results in low accuracy of the test data.
The first and second dial indicators were set at both ends of the test bracket respectively to measure the deflection changes at the connection position of the test bracket and the corridor wall and the end away from the corridor wall. The influence of deformation was eliminated through data subtraction. At the same time, rigid gaskets were added to the test device to stabilize the installation of the dial indicator and reduce the risk of the test head slipping.
The data accuracy of the in-situ load test of the cable bracket is improved, the risk of data anomaly caused by bracket deformation is reduced, and the reuse of rigid gaskets is facilitated, thereby controlling the test cost.
Smart Images
Figure CN223426206U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of in-situ load testing technology for pipe gallery cable supports, and in particular to an in-situ load testing device for pipe gallery supports. Background Art
[0002] An underground utility corridor is a tunnel constructed beneath a city, integrating various engineering pipelines such as power, communications, heating, and water supply. To reduce the risk of moisture corrosion, cable supports are typically installed on the corridor walls.
[0003] After the support is erected, it is usually necessary to test the support's load-bearing capacity. On the one hand, this is to determine the approximate time interval for maintenance or replacement of the support, and on the other hand, it is to ensure that the support's load-bearing capacity for the pipeline is within the appropriate range.
[0004] During the test, a test frame is selected, a load is applied to it, and its deflection change is measured at the end of the test frame away from the corridor wall. However, when the load is applied to the test frame, the end where the test frame connects to the corridor wall will also produce some deformation, resulting in lower accuracy of the test data. Utility Model Content
[0005] In order to improve the data accuracy of the in-situ load test of the cable support, the present application provides an in-situ load test device for the cable support of the pipeline corridor.
[0006] The in-situ load test device for a pipe gallery cable support provided in this application adopts the following technical solution:
[0007] A device for in-situ load testing of a pipe gallery cable support comprises a base, a test support, a first dial indicator and a second dial indicator, wherein the base is connected to a gallery wall and is located above the test support; the test support is connected to the gallery wall; the first dial indicator and the second dial indicator are both connected to the base, the test head of the first dial indicator abuts against an end of the test support connected to the gallery wall, and the test head of the second dial indicator abuts against an end of the test support away from the gallery wall.
[0008] By adopting the above technical solution, during the test, a load is applied to the test bracket, and the deflection change data at the connection point of the test bracket to the corridor wall is measured using a first dial indicator. The deflection change data at the end of the test bracket away from the corridor wall is measured using a second dial indicator. The data measured by the first dial indicator is then subtracted from the data measured by the second dial indicator to obtain the test data. This eliminates the influence of deformation on the test data at the end of the test bracket connected to the corridor wall, and improves the data accuracy of the cable bracket in-situ load test.
[0009] Optionally, the test bracket is provided with a rigid gasket, and the rigid gasket is used for abutting the test head of the second dial indicator.
[0010] The cross-section of the test bracket is mostly U-shaped, and the U-shaped opening can be facing upward or downward, and the surface of the test bracket is provided with holes for fixing cables. The dial indicator cannot be set up at the U-shaped opening and the hole. By adopting the above technical solution, a rigid gasket is added to the test device, which, on the one hand, facilitates the connection between the test bracket and the dial indicator, and on the other hand, reduces the risk of the test head of the second dial indicator slipping into the hole due to the deformation of the test bracket during the test, thereby reducing the risk of abnormal test data.
[0011] Optionally, the rigid gasket is detachably connected to the test bracket.
[0012] By adopting the above technical solution, the rigid gasket can be reused easily while taking the test cost into consideration.
[0013] Optionally, the surface where the rigid gasket is connected to the test bracket is provided with double-sided tape.
[0014] By adopting the above technical solution, the double-sided tape is used to realize the detachable connection between the rigid gasket and the test bracket, which is low in cost and simple to install.
[0015] Optionally, the rigid gasket is bolted to the test bracket.
[0016] By adopting the above technical solution, a relatively stable connection between the rigid gasket and the test bracket is ensured while the structure is simple and the operation is convenient.
[0017] Optionally, the test bracket has a groove, the notch of the groove faces the second dial indicator; the end of the groove passes through the end surface of the test bracket away from the corridor wall, and the rigid gasket is snapped into the groove.
[0018] By adopting the above technical solution, a detachable connection between the rigid gasket and the test bracket is achieved through the snap-fitting of the rigid gasket and the groove, and the connection is stable and easy to install and disassemble.
[0019] Optionally, the surface of the rigid gasket facing away from the second dial indicator is connected to a first abutment portion, and the first abutment portion is used to abut the bottom of the groove; the opposite groove walls of the groove both have a second abutment portion, and the second abutment portion is used for the rigid gasket to abut the surface facing the second dial indicator.
[0020] By adopting the above technical solution, when the rigid gasket is clamped to the test bracket, the first abutment portion abuts against the bottom of the groove, and the surface of the rigid gasket facing the second dial indicator abuts against the second abutment portion, thereby utilizing the bottom of the groove and the second abutment portion to limit the rigid gasket, thereby enhancing the connection stability between the rigid gasket and the test bracket.
[0021] Optionally, a pull ring is provided at the end of the rigid gasket away from the corridor wall, and the pull ring is used for allowing a finger to pass through.
[0022] By adopting the above technical solution, the pull ring is used as the force application point for installation and removal of the rigid gasket, thereby improving the convenience of installation and removal of the rigid gasket.
[0023] In summary, this application includes at least one of the following beneficial technical effects:
[0024] 1. By setting a first dial indicator and a second dial indicator at each end of the test support, the deflection change data at both ends of the test support are obtained. The data measured by the first dial indicator is subtracted from the data measured by the second dial indicator. This eliminates the influence of the deformation of the end of the test support connected to the corridor wall on the test data, thereby improving the accuracy of the test data.
[0025] 2. By adding a rigid gasket to the test device and connecting it to the test bracket, this not only facilitates the installation of the second dial indicator, but also reduces the risk of the test head of the second dial indicator slipping out of the hole when the test bracket deforms, thereby reducing the risk of abnormal test data.
[0026] 3. By making the rigid gasket detachably connected to the test bracket, the rigid gasket can be reused, while taking the test cost into consideration. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 It is a structural diagram of Example 1 of the present application.
[0028] Figure 2 It is a schematic diagram for showing the structure of the test bracket in Example 1.
[0029] Figure 3 yes Figure 2 An enlarged schematic diagram in part A.
[0030] Figure 4 It is a structural diagram of Example 2 of the present application.
[0031] Figure 5 It is a schematic diagram for showing the structure of the pull ring in Example 2.
[0032] Explanation of the accompanying reference numerals: 1. base; 2. test bracket; 21. groove; 22. second abutting portion; 3. first dial indicator; 4. second dial indicator; 5. rigid gasket; 51. first abutting portion; 52. pull ring; 6. corridor wall. DETAILED DESCRIPTION
[0033] The following is combined with Figure 1-5 This application is described in further detail.
[0034] Multiple cable supports are arranged in a rectangular array and connected to the corridor wall. I-beams or U-shaped steel are typically used for the cable supports. They are secured to the corridor wall using pre-embedded slots and hexagonal bolts. When testing the load capacity of the cable supports, a random cable support is selected as the test support.
[0035] An embodiment of the present application discloses an in-situ load test device for a pipe gallery cable support, so as to improve the data accuracy of the in-situ load test of the cable support.
[0036] Example 1
[0037] Reference Figure 1 A device for in-situ load testing of a cable support in a pipe corridor includes a base 1, a test support 2, a first dial indicator 3, and a second dial indicator 4. The base 1 is connected to the corridor wall 6. The base 1 is located above the test support 2, and the test support 2 is connected to the corridor wall 6. The first dial indicator 3 and the second dial indicator 4 are both connected to the base 1. The test head of the first dial indicator 3 abuts against one end of the test support 2 connected to the corridor wall 6, and the test head of the second dial indicator 4 abuts against one end of the test support 2 away from the corridor wall 6. During the test, a load is applied to the test support 2, and the deflection change data of the end of the test support 2 connected to the corridor wall 6 is measured using the first dial indicator 3. The deflection change data of the end of the test support 2 away from the corridor wall 6 is measured using the second dial indicator 4. The data measured by the first dial indicator 3 is subtracted from the data measured by the second dial indicator 4, thereby eliminating the influence of the deformation of the end of the test support 2 connected to the corridor wall on the test data, thereby ensuring the accuracy of the test data.
[0038] Reference Figure 2 The base 1 is acted as a cable bracket above the test bracket 2. During the test, the test bracket 2 is moved up to a position about 20 cm away from the base 1 and re-tightened to facilitate the installation of the first dial indicator 3 and the second dial indicator 4.
[0039] It is understandable that in other embodiments, the base 1 may also be a separate steel pipe or steel section.
[0040] The method of applying a load to the test bracket 2 may be to hang a counterweight on the test bracket 2 , or to directly apply a downward pulling force to the test bracket 2 .
[0041] Further, referring to Figure 2 and Figure 3 , the test support 2 is provided with a rigid pad 5 for the test head of the second dial gauge 4 to abut against. On the one hand, when the U-shaped mouth of the test support 2 faces upwards, it is convenient for the second dial gauge 4 to abut against the test support 2; on the other hand, the cable support is usually provided with a hole for fixing the cable, and the provision of the rigid pad 5 reduces the risk that the test head of the second dial gauge 4 will fall into the hole when the test support 2 deforms, thereby reducing the risk of abnormal test data.
[0042] Further, the rigid pad 5 is detachably connected with the test support 2, so that the rigid pad 5 can be reused, taking into account the test cost. The detachable connection between the rigid pad 5 and the test support 2 includes but is not limited to the following modes: adhesion with double-sided tape, connection with bolts or clamping. Among them, the adhesion with double-sided tape has low cost and is convenient to install; the connection with bolts forms a relatively stable connection between the rigid pad 5 and the support 2; the clamping mode is convenient to disassemble and has high connection stability.
[0043] Further, referring to Figure 3 , the width of the rigid pad 5 is greater than the width of the test support 2, so as to facilitate installation by the tester, and further reduce the risk of the test head of the second dial gauge 4 falling from the test support 2, thereby reducing the risk of abnormal test data.
[0044] The implementation principle of embodiment 1 is: when performing the in-situ load test of the cable support, the rigid pad 5 is connected to the end of the test support 2 away from the corridor wall 6, then the first dial gauge 3 and the second dial gauge 4 are erected on the base 1, and the test head of the first dial gauge 3 abuts against the end of the test support 2 connected to the corridor wall 6, and the test head of the second dial gauge 4 abuts against the end of the test support 2 away from the corridor wall 6, and finally a load is applied to the test support 2, thereby completing the installation of the test device.
[0045] After the test device is installed, the load applied to the test device is gradually increased, the deflection change data of the end of the test support 2 connected to the corridor wall 6 is recorded by the first dial gauge 3, the deflection change data of the end of the test support 2 away from the corridor wall 6 is recorded by the second dial gauge 4, and finally the data measured by the second dial gauge 4 is subtracted from the data measured by the first dial gauge 3, to obtain the final test data of the deflection change.
[0046] Embodiment 2
[0047] Referring to Figure 4The difference between this embodiment and embodiment 1 is that the test bracket 2 has a groove 21, and the end of the groove 21 passes through the end of the test bracket 2 away from the corridor wall 6. The surface of the rigid gasket 5 facing away from the second dial indicator 4 is connected to a first abutment portion 51, and the first abutment portion 51 is used for abutting the bottom of the groove 21. The two opposite groove walls of the groove 21 each have a second abutment portion 22, and the second abutment portion 22 is used for abutting the surface of the rigid gasket 5 facing the second dial indicator 4. Therefore, the second abutment portion 22 is used to form a limit with the bottom of the groove 21 and the rigid gasket 5 to ensure the connection stability between the rigid gasket 5 and the test bracket 2, and reduce the risk of the rigid gasket 5 slipping relative to the test bracket 2 when the test bracket 2 is deformed.
[0048] Further, refer to Figure 4 and Figure 5 The end of the rigid gasket 5 away from the gallery wall 6 is provided with a pull ring 52 for a finger to pass through. This provides a force point for the tester at the end of the rigid gasket 5 away from the gallery wall 6, facilitating assembly and disassembly of the rigid gasket 5. The connection methods of the pull ring 52 to the rigid gasket 5 include, but are not limited to, welding, integral molding, or hinged connection.
[0049] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.
Claims
1. An in-situ load test device for a pipe gallery cable support, characterized by: The invention comprises a base (1), a test bracket (2), a first dial indicator (3) and a second dial indicator (4), wherein the base (1) is connected to the corridor wall, and the base (1) is located above the test bracket (2); the test bracket (2) is connected to the corridor wall; the first dial indicator (3) and the second dial indicator (4) are both connected to the base (1); the test head of the first dial indicator (3) abuts against one end of the test bracket (2) connected to the corridor wall, and the test head of the second dial indicator (4) abuts against one end of the test bracket (2) away from the corridor wall.
2. The in-situ load test device for a pipe gallery cable support according to claim 1 is characterized in that: The test bracket (2) is provided with a rigid gasket (5), and the rigid gasket (5) is used for abutting the test head of the second dial indicator (4).
3. The in-situ load test device for a pipe gallery cable support according to claim 2 is characterized in that: The rigid gasket (5) is detachably connected to the test bracket (2).
4. The in-situ load test device for a pipe gallery cable support according to claim 3 is characterized in that: The surface where the rigid gasket (5) is connected to the test bracket (2) is provided with double-sided tape.
5. The in-situ load test device for a pipe gallery cable support according to claim 3 is characterized in that: The rigid gasket (5) is bolted to the test bracket (2).
6. The in-situ load test device for a pipe gallery cable support according to claim 2 or 3, characterized in that: The test bracket (2) has a groove (21), the notch of the groove (21) faces the second dial indicator (4); the end of the groove (21) passes through the end surface of the test bracket (2) away from the corridor wall, and the rigid gasket (5) is clamped in the groove (21).
7. The in-situ load test device for a pipe gallery cable support according to claim 6, characterized in that: The surface of the rigid gasket (5) facing away from the second dial indicator (4) is connected to a first abutting portion (51), and the first abutting portion (51) is used for abutting against the bottom of the groove (21); the groove walls opposite to the groove (21) are each provided with a second abutting portion (22), and the second abutting portion (22) is used for abutting against the surface of the rigid gasket (5) facing the second dial indicator (4).
8. The in-situ load test device for a pipe gallery cable support according to claim 7, characterized in that: A pull ring (52) is provided at the end of the rigid gasket (5) away from the corridor wall, and the pull ring (52) is used for allowing a finger to pass through.