Plastic corrugated pipe flexibility test fixture

Abstract

The utility model discloses a plastic corrugated pipe flexibility test jig which comprises a base, the top end of the base is fixedly connected with a back plate, the front face of the back plate is slidably connected with a second movable plate and a first movable plate, a fixing hole is formed in the middle of the top end of the base, and a clamping mechanism is installed at the bottom end of the fixing hole. The bottom end of the corrugated pipe is fixed by arranging the clamping mechanism, during use, before the corrugated pipe is fixed, the pedal is treaded downwards, at the moment, the pedal drives the lifting plate to descend through the sliding rod, the lifting plate drives the movable frame to be opened, then the bottom end of the corrugated pipe is inserted into the fixing hole, and the pedal is loosened, so that the corrugated pipe is fixed. Compared with an existing testing device, the corrugated pipe bottom end fixing device can fix the bottom ends of corrugated pipes with different diameters, and the accuracy of a testing result is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering detection, in particular to a plastic bellows flexibility test fixture. Background Art

[0002] Plastic corrugated pipe is a common material used in bridge engineering, mainly used in post-tensioned prestressed concrete structures. The corrugated pipe serves as a channel and condensation carrier for the prestressed steel strands to be implanted into the concrete later. This requires the prestressed corrugated pipe to have good fatigue resistance to ensure that the prestressed steel strands can pass through smoothly. The flexibility test is a test method to evaluate the fatigue resistance of prestressed corrugated pipes.

[0003] Currently, the flexibility test fixtures on the market have a circular hole at the bottom, through which the bottom end of the bellows is fixed. The diameters of bellows vary. When testing bellows of different sizes, it is easy for the pipe to slip, affecting the accuracy of the test results.

[0004] Therefore, how to provide a plastic bellows flexibility test fixture to solve the problems existing in the prior art is of great significance to its application. Utility Model Content

[0005] In view of this, the purpose of this application is to provide a plastic bellows flexibility test fixture to solve the problem that the diameter specifications of bellows are varied, and when testing bellows of different sizes, it is easy to cause the pipe to slip, affecting the accuracy of the test results.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A plastic bellows flexibility test fixture comprises a base, the top of the base is fixedly connected to a back plate, the front of the back plate is slidably connected to a second movable plate and a first movable plate, a fixing hole is opened in the middle of the top of the base, and a clamping mechanism is installed at the bottom of the fixing hole.

[0008] Preferably, a movable groove is provided in the middle of the bottom end of the base, and the clamping mechanism includes a movable frame, a pedal, a sliding rod and a lifting plate. A cavity is provided between the bottom end of the fixing hole and the movable groove, the top end of the movable frame is hinged to the top end of the cavity, the bottom end of the movable frame is hinged to the lifting plate, and the lifting plate and the pedal are fixedly connected to the top and bottom ends of the sliding rod respectively.

[0009] Preferably, the cavity and the movable groove are separated by a partition, the sliding rod is slidably connected to the partition, and the lifting plate is elastically connected to the top end of the partition via a spring.

[0010] Preferably, the movable frame is composed of two connecting rods, and the ends of the two connecting rods are hinged to each other.

[0011] Preferably, a slide groove is provided on the front side of each of the second movable plate and the first movable plate, and a fixed hand wheel is rotatably connected to the front side of the slide groove.

[0012] Preferably, the bottom end of the first movable plate is fixedly connected to the first movable block, the bottom end of the second movable plate is fixedly connected to the second movable block, the internal rotation of the base is connected to the first synchronous gear and the second synchronous gear, the first synchronous gear and the second synchronous gear are connected by a synchronous chain transmission, and the first movable block and the second movable block are both fixedly connected to the synchronous chain.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The utility model fixes the bottom end of the bellows by setting a clamping mechanism. When in use, before fixing the bellows, step on the pedal downward. At this time, the pedal drives the lifting plate to descend through the sliding rod, and the lifting plate drives the movable frame to open. Then, the bottom end of the bellows is inserted into the fixing hole. The pedal is released, the movable frame closes and fixes the bellows. Compared with the existing testing device, the utility model can fix the bottom ends of bellows of different diameters, thereby improving the accuracy of the test results.

[0015] 2. The utility model realizes the equidistant movement of the two movable plates by setting a synchronous chain. When conducting flexibility tests on corrugated pipes of different specifications, when it is necessary to adjust the distance between the two movable plates, the fixed hand wheel is rotated first. When the second movable plate is moved, the second movable plate drives the synchronous chain to rotate through the first movable block at its bottom end, and the synchronous chain drives the first movable plate to move synchronously through the second movable block, thereby realizing the equidistant movement of the two movable plates.

[0016] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application so that it can be implemented in accordance with the contents of the specification, and to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following is a detailed description of the preferred embodiment of the present application in conjunction with the accompanying drawings.

[0017] Based on the detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings below, those skilled in the art will become more aware of the above and other objects, advantages and features of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without inventive work. In all drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0019] Figure 1 It is a structural diagram of the utility model;

[0020] Figure 2 This is the main view of the utility model;

[0021] Figure 3 This is a structural diagram of the synchronous chain in the present utility model;

[0022] Figure 4 for Figure 2 Enlarged view of point A.

[0023] In the figure: 1. Base; 2. Fixing hole; 3. Pedal; 4. Movable slot; 5. Fixed handwheel; 6. Second movable plate; 7. Back plate; 8. First movable plate; 9. Slide slot; 10. First synchronous gear; 11. First movable block; 12. Synchronous chain; 13. Second movable block; 14. Second synchronous gear; 15. Movable frame; 16. Lifting plate; 17. Spring; 18. Slide rod. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. In the following description, specific details such as specific configurations and components are provided only to help fully understand the embodiments of the present application. Therefore, it should be clear to those skilled in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. In addition, for clarity and brevity, the description of known functions and structures has been omitted in the embodiments.

[0025] In addition, the present application may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0026] The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist at the same time. The term " / and" in this article describes another type of association object relationship, indicating that two relationships can exist. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the previous and subsequent associated objects are in an "or" relationship.

[0027] It should also be noted that, in this document, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include," "comprises," or any other variations thereof are intended to cover non-exclusive inclusion.

[0028] See also Figure 1-4 The present invention provides a technical solution for a plastic bellows flexibility test fixture: it includes a base 1, the top of the base 1 is fixedly connected to a back plate 7, the front of the back plate 7 is slidably connected to a second movable plate 6 and a first movable plate 8, a fixing hole 2 is opened in the middle of the top of the base 1, and a clamping mechanism is installed at the bottom end of the fixing hole 2.

[0029] A movable groove 4 is provided in the middle of the bottom end of the base 1, and the clamping mechanism includes a movable frame 15, a pedal 3, a slide rod 18 and a lifting plate 16. A cavity is provided between the bottom end of the fixing hole 2 and the movable groove 4. The top end of the movable frame 15 is hinged to the top end of the cavity, and the bottom end of the movable frame 15 is hinged to the lifting plate 16. The lifting plate 16 and the pedal 3 are fixedly connected to the top and bottom ends of the slide rod 18, respectively.

[0030] The cavity and the movable groove 4 are separated by a partition, the slide rod 18 is slidably connected to the partition, and the lifting plate 16 is elastically connected to the top of the partition via a spring 17.

[0031] The movable frame 15 is composed of two connecting rods, and the head and tail of the two connecting rods are hinged to each other.

[0032] A sliding groove 9 is provided on the front side of the second movable plate 6 and the first movable plate 8 , and the front side of the sliding groove 9 is rotatably connected to the fixed hand wheel 5 .

[0033] The bottom end of the first movable plate 8 is fixedly connected to the first movable block 11, and the bottom end of the second movable plate 6 is fixedly connected to the second movable block 13. The internal rotation of the base 1 is connected to the first synchronous gear 10 and the second synchronous gear 14. The first synchronous gear 10 and the second synchronous gear 14 are connected by a synchronous chain 12. The first movable block 11 and the second movable block 13 are fixedly connected to the synchronous chain 12. When the flexibility test of corrugated pipes of different specifications is carried out, when it is necessary to adjust the spacing between the two movable plates, the fixed handwheel 5 is rotated first. When moving the first movable plate 8, the first movable plate 8 drives the synchronous chain 12 to rotate through the first movable block 11 at its bottom end, and the synchronous chain 12 drives the second movable plate 6 to move synchronously through the second movable block 13, thereby realizing the equidistant movement of the two movable plates.

[0034] During specific use, before fixing the bellows, the pedal 3 is stepped down. At this time, the pedal 3 drives the lifting plate 16 to descend through the sliding rod 18, and the lifting plate 16 drives the movable frame 15 to open, and then the bottom end of the bellows is inserted into the fixing hole 2, and the pedal 3 is released. The spring 17 drives the lifting plate 16 to rise, and the movable frame 15 closes and fixes the bellows. Compared with the existing testing device, the utility model can fix the bottom end of bellows of different diameters, improve the accuracy of the test results, and when performing flexibility tests on bellows of different specifications, when it is necessary to adjust the spacing between the two movable plates, the fixed handwheel 5 is first turned. When moving the first movable plate 8, the first movable plate 8 drives the synchronous chain 12 to rotate through the first movable block 11 at its bottom end, and the synchronous chain 12 drives the second movable plate 6 to move synchronously through the second movable block 13, thereby realizing the equidistant movement of the two movable plates.

[0035] The above description is merely a preferred embodiment of the present invention and does not limit the scope of protection of the present invention. Those skilled in the art will appreciate that the present invention is susceptible to various modifications and variations. Any variation, modification, replacement, integration, or parameter change to these embodiments, which falls within the spirit and principles of the present invention and achieves the same functionality through conventional substitutions, without departing from the principles and spirit of the present invention, falls within the scope of protection of the present invention.

Claims

1. A plastic bellows flexibility test fixture, characterized by: The invention comprises a base (1), the top of the base (1) is fixedly connected to a back plate (7), the front of the back plate (7) is slidably connected to a second movable plate (6) and a first movable plate (8), a fixing hole (2) is provided in the middle of the top of the base (1), and a clamping mechanism is installed at the bottom of the fixing hole (2); A movable groove (4) is provided in the middle of the bottom end of the base (1); the clamping mechanism comprises a movable frame (15), a pedal (3), a slide bar (18) and a lifting plate (16); a cavity is provided between the bottom end of the fixing hole (2) and the movable groove (4); the top end of the movable frame (15) is hinged to the top end of the cavity; the bottom end of the movable frame (15) is hinged to the lifting plate (16); the lifting plate (16) and the pedal (3) are fixedly connected to the top end and the bottom end of the slide bar (18), respectively.

2. A plastic bellows flexibility test jig according to claim 1, characterized in that: The cavity and the movable groove (4) are separated by a partition, the sliding rod (18) is slidably connected to the partition, and the lifting plate (16) is elastically connected to the top of the partition via a spring (17).

3. A plastic bellows flexibility test fixture as claimed in claim 2, characterized in that: The movable frame (15) is composed of two connecting rods, and the ends of the two connecting rods are hinged to each other.

4. A plastic bellows flexibility test jig according to claim 3, characterized in that: The front sides of the second movable plate (6) and the first movable plate (8) are both provided with a sliding groove (9), and the front side of the sliding groove (9) is rotatably connected to a fixed hand wheel (5).

5. A plastic bellows flexibility test jig according to claim 4, characterized in that: The bottom end of the first movable plate (8) is fixedly connected to a first movable block (11), the bottom end of the second movable plate (6) is fixedly connected to a second movable block (13), the interior of the base (1) is rotatably connected to a first synchronous gear (10) and a second synchronous gear (14), the first synchronous gear (10) and the second synchronous gear (14) are connected by a synchronous chain (12), and the first movable block (11) and the second movable block (13) are both fixedly connected to the synchronous chain (12).

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