RU2023812C1 - Anchor unit for securing equipment to foundation - Google Patents

Abstract

FIELD: construction. SUBSTANCE: anchor unit has rod with a nut, extensible bushings, and stop pipe. Bottom part of the rod is made of two cones which are positioned with a spaced relation to each other and face each other by their lower bases. A spring is interposed between the cones. Bushings enclose the cones. The pipe abuts against grater base of the top cone. EFFECT: enhanced reliability. 3 dwg

Description

 The invention relates to the field of construction and can be used for attaching various equipment to the bearing surface of structures and structures subjected to both static and dynamic effects, for example, for attaching vibrators to the foundations of turbine units during their dynamic tests.

 It is known an anchor device for attaching equipment to the supporting elements of structures, consisting of a steel rod with thread on one side and a tapered shank on the other, which is installed in the well formed in the finished concrete or reinforced concrete element of the structure, and fixed in it using cement mortar.

 The disadvantage of this device is the duration of the installation of the anchor device, since the cement mortar hardens within 28 days, and the brittleness of the cement stone, which crack when exposed to alternating dynamic loads, for example, when the vibrators work during dynamic testing of structures, which lengthens the construction process of the facility and reduces the accuracy of test results.

 Known anchor for attaching elements to the base, adopted as a prototype. This device consists of a rod with an expansion part at the lower end and sliding cheeks pulled together by an elastic ring. An anchor is installed in a pre-prepared cylindrical hole of the base and loaded with vertical force by screwing the nut on the rod, as a result of which the cheeks are moved apart, i.e. wedged in the hole.

 A disadvantage of the known anchor is that it perceives only a tensile load and does not perceive a load of the opposite direction (compression) at all.

 The aim of the invention is to increase the strength and reliability of fastening equipment to a building structure with alternating dynamic loads, reducing installation time of the equipment.

 The goal is achieved by the fact that the anchor device, including a rod with a nut at one end and with a cone tapering towards the nut at the other end, sliding half-sleeves with a serrated surface, covering the cone, and a thrust pipe freely put on the rod, are equipped with an additional cone inverse to the main and loosely worn on the rod, additional half-sleeves covering the additional cone, and a spring placed between the cones, and the pipe is rested on the larger base of the additional cone.

 The proposed anchor device, in comparison with the known ones, is capable of absorbing large static and alternating dynamic tensile and compression loads, for example, when used for attaching vibrators necessary for dynamic testing of such critical structures, such as foundations for high-power turbine units.

 A distinctive feature of the claimed device is the introduction to its composition of a new element - an additional inverse cone with sliding half-shells with a toothed surface, which in combination with the lower main cone allows this device to perceive both tensile and compressive forces of a static and dynamic nature.

 By introducing an additional inverse cone, the reliability, rigidity and strength of the anchor device are increased.

 In FIG. 1 shows the design of an anchor device prior to application of a load; in FIG. 2 - the same after application of the load; in FIG. 3 is a section AA in FIG. 1.

 An anchor device consists of a rod 1, cones 2, sliding half-shells 3 with a toothed surface, a spring 4, a thrust pipe 5, a nut 6, a washer 7, rings 8, pins 9, coupling spring rings 10 and a centering washer 11 with vertical grooves 12.

 The rod 1 has a thread in the upper part for screwing the nut 6.

 Of the two existing cones 2, the lower (main) is welded to the rod 1, the upper (additional) is freely worn on it.

 Half-sleeves 3 with a serrated surface, worn on cones 2, are pulled together by spring rings 10 and held on them in the initial position by rings 8 and pins 9. Sliding half-sleeves 3 have teeth on the outer surface that cut into the concrete of the well of the building structure when the anchor device is mounted in it as well as grooves for the coupling spring rings 10 and vertical grooves 13 for the passage of the liquid epoxy composition when pouring it after mounting the anchor device in the well of the building structure (in the case of using the anchor stroystva in structures exposed to a large alternating dynamic loading) as well as to provide easier insertion of teeth half sleeves 3 in the concrete at their wedging teeth by reducing the perimeter.

 The thrust pipe 5 is designed to transfer force to the upper additional cone 2 and then to the half sleeve 3 when screwing the nut 6. The pipe has holes on the side 14 for penetration of the liquid composition to the surface of the rod 1.

 The spring 4 serves to hold the upper assembly from contact with the lower in its original position.

 In the upper part of the anchor device, a centering washer 11 with vertical grooves 12 is put on the thrust pipe 5, designed to transfer horizontal alternating dynamic loads to concrete 15 of the building structure. Vertical grooves 12 in the centering washer 11 serve for the passage of the liquid composition in the case of filling it with a well 16.

 Installation of the anchor device is as follows.

 The components making up the lower assembly are sequentially put on the rod 1 with the welded lower (main) cone 2: sliding half-sleeves 3 with a toothed surface, ring 8, and a coupling spring ring 10 is inserted into the grooves of the half-sleeves. Then, the pins 9 holding into the side holes of the cone 2 ring 8 and sliding half-sleeves 3 with a spring ring 10 on the cone 2.

 Next, the springs 4 and the upper assembly, consisting of the same parts as the lower one, are tapered down on the rod 1. Then, a stop pipe 5, a centering washer 11 and a washer 7 are put on the rod 1, after which the nut 6 is screwed onto the rod until it touches the washer 7.

 Then, the pre-drilled in concrete 15 of the building structure cylindrical borehole 16 lowers the assembled anchor device to the stop of the rod 1 in its bottom. After that, screw nut 6 onto the shaft 1.

 When tightening the nut 6 (i.e., loading the rod 1 with a vertical force), the following occurs. The nut 6 presses through the washer 7 and the centering washer 11 on the thrust pipe 5, creating a longitudinal force directed down the well, which presses on the upper (additional) cone 2. Under the action of this force, the upper cone moves down and, sliding along the rod 1, pushes the upper sliding half-sleeves 3 remaining in place, due to which a proppant force is created in the borehole 16 shown in FIG. 2 arrows. Under the action of a wedging force, the half-sleeves 3 cut their gear surface into the concrete 15 of the building structure. At the same time, when screwing the nut 6, the rod 1 rises under the action of the force directed upward, entraining the lower (main) cone 2, which pushes the lower half-sleeves 3, the latter also cut into the concrete of the building structure with their serrated surface.

 In this case, the spring 4, compressing, does not prevent the lower (main) and upper (additional) cones from approaching each other.

 After the teeth of the half-sleeves 3 are fully inserted into the concrete, the screwing of the nut 6 is stopped, while the movement of the rod 1 and the stop pipe 5 is stopped and the anchor device occupies the position shown in FIG. 2. Due to the insertion of the teeth of the half-sleeves 3 into the concrete of the building structure, a firm grip of the anchor device with concrete is ensured.

 After installation of the equipment on the foundation of the building structure when an alternating dynamic load occurs, the anchor device operates as follows.

 If there is a vertical force directed upwards, then the lower assembly works, perceiving this force and transferring it to the foundation; if there is a vertical force directed downward, then the upper assembly works in a similar way.

 Arising during the operation of the equipment, horizontal alternating dynamic loads are perceived by the washer 11, centering the anchor device in the well 16.

 To absorb large alternating dynamic loads, the well 16, after mounting in it and pulling the anchor device, is filled with a polymer composition, for example, epoxy glue.

 The use of the invention improves the reliability of the results obtained during dynamic testing of structures and building structures.

 The invention can be used both in the construction of new enterprises, and in the reconstruction of existing in various industries, especially in cases where the equipment often moves from place to place, for example, when changing the technological process.

Claims (1)

 ANCHOR DEVICE FOR ATTACHING EQUIPMENT TO THE FOUNDATION including a rod with a nut at one end and a cone tapering to the side of the nut at the other end, sliding half-sleeves with a serrated surface covering the cone, and a free thrust pipe mounted on the rod, characterized in that, in order to increase the reliability of the device it is equipped with an additional cone, the inverse of the main and freely worn on the rod, additional half-sleeves covering the additional cone, and a spring placed between the cones, and the pipe Perth additional larger base of the cone.

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