Counter-force device for horizontal thrust test of handrail
By designing a horizontal thrust test reaction device for railings, the reaction beam and chain are fixed to the test railings. The jack uses the reaction beam as the reaction point, which solves the problem that it is difficult to provide a reaction point in a single-sided railing or no closer wall, and achieves convenience and efficiency improvement of the test process.
Patent Information
- Application Number
- CN202421958016.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-13
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-08-13
AI Technical Summary
The existing railing horizontal thrust test method is difficult to provide a reaction point easily when a single-sided railing or no closer wall, resulting in inconvenient testing.
A railing horizontal thrust test reaction device is designed, including a reaction beam and a chain. The chains at both ends of the reaction beam can be detached and installed on the columns of the test railing. The jack is tested by the reaction beam as the reaction point.
Through this device, a single-sided railing or no closer wall can also be provided with a reaction point, simplifying the test process and improving the convenience and efficiency of the test.
Smart Images
Figure CN223051047U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of railing testing, and in particular to a reaction force device for the horizontal thrust test of railings. Background Art
[0002] The horizontal thrust test of railings is usually carried out according to relevant specifications such as "Stair Railings and Handrails" (JG / T 558-2018). According to the specification requirements, two concentrated forces need to be applied to the railing test section. In previous tests, the two concentrated forces were applied by jacks, and the reaction force was provided by the railing on the other side. The advantage is that it is extremely convenient and efficient to load by using the railing on the other side to provide the reaction force, without the need for additional instruments or tools. However, this method is only applicable to railings with symmetrical designs on the other side of the test railing or walls that are relatively close. For railings with only one-sided railings and no railing or no relatively close wall on the other side to provide a reaction force application point, it is necessary to additionally set up a reaction force application point, which is relatively inconvenient. Utility Model Content
[0003] In order to facilitate the provision of a reaction force application point for railing testing, this application provides a reaction force device for the horizontal thrust test of railings.
[0004] A reaction force device for the horizontal thrust test of railings provided by this application adopts the following technical solutions:
[0005] A reaction force device for the horizontal thrust test of railings includes a reaction force beam located on one side of the test railing. Chains are provided at both ends of the reaction force beam, and the chains are detachably installed on the columns of the test railing.
[0006] By adopting the above technical solutions, the chains at both ends of the reaction force beam are fixed on the columns of the test railing, and the jack uses the reaction force beam as a reaction force application point to conduct the horizontal thrust test of the railing, so as to facilitate the use in the case of one-sided railings or no relatively close wall to provide a reaction force application point.
[0007] Preferably, the length of the reaction force beam is at least 3 times the length of the test railing section.
[0008] By adopting the above technical solutions, the distance between the chains of the reaction force beam fixed on the test railing section has a certain influence on the test results. When the chains of the reaction force beam are fixed on the columns of the second railing section on both sides of the test railing section, there is basically no influence.
[0009] Preferably, the reaction force beam is assembled by prefabricated and assembled methods, and the single-section length is 1-1.5 m.
[0010] By adopting the above technical solutions, the reaction force beam is assembled by prefabricated and assembled methods, thus facilitating transportation.
[0011] Preferably, the cross-section of the reaction force beam is in the shape of an I-beam.
[0012] By adopting the above technical solution, the I-shaped reaction beam has relatively high structural strength, so that it can stably provide a reaction force acting point.
[0013] Preferably, it further includes auxiliary support rods, and a supporting plate is arranged at the upper end of the auxiliary support rods, and the reaction beam is placed on the supporting plate.
[0014] By adopting the above technical solution, the reaction beam is supported by the supporting plate on the auxiliary support rod, so that it is convenient to fix the chain on the reaction beam to the test railing, and at the same time, it is convenient for the reaction beam to be used as a reaction force acting point.
[0015] Preferably, a plurality of auxiliary support rods are arranged at intervals along the length direction of the reaction beam.
[0016] By adopting the above technical solution, the plurality of auxiliary support rods further improve the convenience of installing the reaction beam.
[0017] Preferably, a placement seat is arranged at the lower end of the auxiliary support rod.
[0018] By adopting the above technical solution, the placement seat improves the stability of the auxiliary support rod for supporting the reaction beam.
[0019] Preferably, a lock catch is arranged at the end of the chain, and the chain is fixed to the column of the test railing through the lock catch.
[0020] By adopting the above technical solution, it is convenient to fix the chain to the test railing through the lock catch.
[0021] In summary, the present application includes at least one of the following beneficial technical effects:
[0022] The chain at both ends of the reaction beam is fixed to the column of the test railing, and the jack uses the reaction beam as a reaction force acting point to conduct a horizontal thrust test on the railing, so that it is convenient to use in the case of a single-sided railing or no nearby wall to provide a reaction force acting point. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 is a side view of the reaction device for the horizontal thrust test of the railing in the embodiment of the present application.
[0024] Figure 2 is a top view of the reaction device in the embodiment of the present application.
[0025] Description of the reference numerals: 1, reaction beam; 2, chain; 3, test railing; 4, jack; 5, auxiliary support rod; 6, supporting plate; 7, placement seat. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0026] The following will further describe the present application in detail Figure 1-2 with reference to the attached
[0027] This embodiment of the present application discloses a reaction force device for the horizontal thrust test of railings. Referring to Figure 1 and Figure 2 , the reaction force device includes a reaction force beam 1 and chains 2 fixedly arranged at both ends of the reaction force beam 1. When a horizontal thrust test needs to be carried out on the railing, the chains 2 at both ends of the reaction force beam 1 are fixed on the columns of the test railing 3, and then the base of the jack 4 is abutted against the side wall of the reaction force beam 1 as the reaction force acting point. Thus, it is convenient to use in the case of a single-sided railing or when there is no nearby wall to provide a reaction force acting point.
[0028] In order to verify whether fixing the reaction force device on the columns of the test railing has an impact on the test results, the following test is carried out.
[0029] Select the two middle segments of the test railing as the test objects and verify them under four working conditions.
[0030] Working condition 1: Only two concentrated forces of 6.25 KN act on the test segments of the test railing, and the reaction force is provided by an independent system.
[0031] Working condition 2: Only two concentrated forces of 6.25 KN act on the test segments of the test railing, and one concentrated force of 6.25 KN acts on each of the columns of the first segments on the left and right sides outside the test railing segments as the reaction force.
[0032] Working condition 3: Only two concentrated forces of 6.25 KN act on the test segments of the test railing, and one concentrated force of 6.25 KN acts on each of the columns of the second segments on the left and right sides outside the test railing segments as the reaction force.
[0033] Working condition 4: Only two concentrated forces of 6.25 KN act on the test segments of the test railing, and one concentrated force of 6.25 KN acts on each of the columns of the third segments on the left and right sides outside the test railing segments as the reaction force.
[0034] The calculation results of each working condition are as follows:
[0035]
[0036] As can be seen from the above table, regardless of where the reaction force acting point is set, it only affects the deflections of the top measuring points (measuring points A and E) of the columns on both sides of the test segment, and has no effect on the remaining measuring points B, C, and D. Moreover, in working condition 3, when the reaction force measuring point is located on the columns of the second segments on the left and right sides outside the test railing segment, the influence is almost negligible, and in working condition 4, when it is located on the third segment, there is no influence at all.
[0037] Therefore, it can be concluded that the acting point of the reaction force device should be fixed at least on the columns of the second segments on the left and right sides outside the test railing segment so as not to affect the test results.
[0038] Since the reaction beam 1 is fixed to the column of the test railing 3 by the chain 2, in order to reduce the influence on the test results of the horizontal thrust of the railing, the length of the reaction beam 1 in this application is at least 3 times the length of the section of the test railing 3.
[0039] Furthermore, in order to improve the structural strength of the reaction beam 1, the cross-section of the reaction beam 1 is in the shape of an I-beam. And in order to facilitate the transportation of the reaction beam 1, the reaction beam 1 is assembled by prefabricated splicing, and its single-section length is 1 - 1.5 m. The splicing and fixing method of the reaction beam 1 is bolt fixing.
[0040] In order to facilitate the fixing of the chain 2 to the column of the test railing 3, a lock catch is provided at the end of the chain 2, and the chain 2 is fixed to the column of the test railing 3 through the lock catch.
[0041] It also includes a plurality of auxiliary support rods 5, and the plurality of auxiliary support rods 5 are arranged at intervals along the length direction of the reaction beam 1. A horizontal support plate 6 is provided at the upper end of the auxiliary support rod 5, and the reaction beam 1 is placed on the support plate 6. The reaction beam 1 is supported by the support plate 6 on the auxiliary support rod 5, so as to facilitate the fixing of the chain 2 on the reaction beam 1 to the test railing 3, and at the same time facilitate the reaction beam 1 to be used as a reaction point. A placement seat 7 is provided at the lower end of the auxiliary support rod 5. The placement seat 7 improves the stability of the auxiliary support rod 5 in supporting the reaction beam 1.
[0042] The implementation principle of a reaction device for the horizontal thrust test of a railing in an embodiment of this application is: the chains 2 at both ends of the reaction beam 1 are fixed to the columns of the test railing 3, and the jack 4 uses the reaction beam 1 as a reaction point to conduct the horizontal thrust test of the railing, so as to facilitate the use in the case of a single-sided railing or no nearby wall to provide a reaction point.
[0043] Unless otherwise defined, the technical terms or scientific terms used in this application should have the ordinary meaning understood by those with ordinary skills in the field to which this application belongs. The "first", "second", "third" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "a" or "one" do not indicate a quantity limitation, but indicate that there is at least one. Words such as "including" or "comprising" mean that the elements or objects appearing before "including" or "comprising" cover the elements or objects listed after "including" or "comprising" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right", etc. are only used to indicate the relative position relationship. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.
[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.
Claims
1. A horizontal thrust test reaction device for a railing, characterized in that: It comprises a reaction beam (1) located on one side of a test railing (3), with chains (2) being arranged at both ends of the reaction beam (1), and the chains (2) being detachably mounted on the upright posts of the test railing (3).
2. The railing horizontal thrust test reaction device according to claim 1, characterized in that: The length of the reaction beam (1) is at least three times the length of the segment of the test railing (3).
3. The railing horizontal thrust test reaction device according to claim 1, characterized in that: The reaction beam (1) is assembled in a prefabricated assembly manner, and the length of a single section is 1-1.5 m.
4. The railing horizontal thrust test reaction device according to claim 1, characterized in that: The cross section of the reaction beam (1) is in an I-shape.
5. The railing horizontal thrust test reaction device according to claim 1, characterized in that: It also comprises an auxiliary support rod (5), the upper end of which is provided with a support plate (6), and the reaction beam (1) is placed on the support plate (6).
6. The railing horizontal thrust test reaction device according to claim 5, characterized in that: A plurality of auxiliary support rods (5) are arranged at intervals along the length direction of the reaction beam (1).
7. The railing horizontal thrust test reaction device according to claim 5, characterized in that: A placement seat (7) is provided at the lower end of the auxiliary support rod (5).
8. The railing horizontal thrust test reaction device according to claim 1, characterized in that: A lock buckle is provided at the end of the chain (2), and the chain (2) is fixed to the upright post of the test railing (3) via the lock buckle.