Auxiliary device for fixing and pretensioning joint meter

Abstract

The utility model discloses a fixing and pretensioning auxiliary device for a joint meter. The fixing and pretensioning auxiliary device comprises a sleeve base of the joint meter, the peripheral surface of the sleeve base is a rough surface, a one-way clamping groove is formed in the peripheral surface of the sleeve base, and a pre-tensioning mechanism is detachably and fixedly arranged on the peripheral surface of the sleeve base in a sleeving manner; a first sleeve opening of the sleeve base is used for inserting a joint meter, a connector is connected into a second sleeve opening of the sleeve base in a threaded mode, an anchor rod extending out of the sleeve base is fixed to one end of the connector, and a concave cavity used for being connected with the joint meter is formed in the other end of the connector. The outer peripheral surface of the sleeve base is arranged to be the rough surface, and the anchor rod which is arranged on the connector and extends towards the outside of the sleeve is arranged, so that the joint meter is effectively fixed in rock or concrete, the reliability of the fixed end of the joint meter is ensured, and the accuracy of data acquisition of the joint meter is further ensured; through the pre-tensioning mechanism, not only can the accurate pre-tensioning operation of the joint meter be realized, but also the integrity of the joint meter and the sleeve base is enhanced, and the joint meter is better protected from being collided by falling rocks and other objects.

Description

Technical Field

[0001] The utility model relates to a joint meter used in engineering safety monitoring, in particular to a joint meter fixing pre-tensioning auxiliary device. Background Art

[0002] In engineering safety monitoring, crack meters are used to monitor the deformation of engineering structures in real time, including structural displacement, crack expansion, material aging, tilt, crack width, etc. These data are used to analyze and evaluate the bearing capacity and durability of engineering structures, and provide important reference for structural design, construction and maintenance. Through real-time monitoring and data analysis, problems in engineering structures can be discovered in a timely manner, potential safety risks and accidents can be avoided, and the safety of people's lives and property can be guaranteed.

[0003] At present, when using and installing the joint meter, it is necessary to first cast the sleeve base of the joint meter in the concrete block or rock mass, and then install the joint meter body in the sleeve base after the concrete solidifies and stabilizes. After that, the joint meter is pre-tensioned to 1 / 4 to 1 / 3 of its maximum range by empirical method to complete the installation of the joint meter. However, since the rock mass or concrete block cannot provide effective friction resistance to the joint meter, the joint meter becomes loose and fails during pre-tensioning, making it impossible for the joint meter to measure the actual deformation of the corresponding position, and thus unable to provide accurate data for engineering construction. Summary of the invention

[0004] The utility model aims to provide a joint meter fixing pre-tensioning auxiliary device with high installation survival rate.

[0005] In order to achieve the above purpose, the utility model can adopt the following technical solutions:

[0006] The utility model discloses a joint meter fixing pre-tensioning auxiliary device, comprising a sleeve base of the joint meter; the outer peripheral surface of the sleeve base is a rough surface, a one-way card groove is provided on the outer peripheral surface of the sleeve base, and a pre-tensioning mechanism is detachably fixed on the outer peripheral surface of the sleeve base; the first barrel opening of the sleeve base is used for inserting the joint meter, and a connector is threadedly connected in the second barrel opening of the sleeve base, one end of the connector is fixed with an anchor rod extending out of the sleeve base, and the other end of the connector is provided with a concave cavity for connecting the joint meter.

[0007] Optionally, the pre-tensioning mechanism includes: a first fixing ring and a second fixing ring, at least two pull rods are evenly fixed between the first and second fixing rings, and three to four pull rods are generally symmetrically arranged; at least one wedge pin is fixed on the inner circumference of the first fixing ring, and two to three of the wedge pins are generally symmetrically arranged, and the wedge pin is used to engage with the one-way groove on the outer circumference of the sleeve base; at least one positioning pin is fixed on the outer end surface of the second fixing ring, and three to four of the positioning pins are generally symmetrically arranged, and the positioning pin is used to engage with the positioning hole on the joint meter base to play a guiding and positioning role.

[0008] Optionally, the inner circumferential surface of the concave cavity is provided with an internal thread for threading a joint meter.

[0009] The advantages of this utility model are embodied in the following aspects:

[0010] 1. By setting the outer peripheral surface of the sleeve base to a rough surface and setting an anchor rod extending out of the sleeve on the connector (the length of the anchor rod can be adjusted according to the on-site conditions), the joint meter is effectively fixed in the rock mass or concrete, ensuring the reliability of the fixed end of the joint meter, thereby ensuring the accuracy of the data collection of the joint meter;

[0011] 2. The pre-tensioning mechanism can not only realize accurate pre-tensioning operation of the joint meter, but also strengthen the integrity of the joint meter and the sleeve base, and better protect the joint meter from collision with falling rocks and other objects.

[0012] 3. The utility model has a simple structural design, is easy to install, and has strong overall rigidity, which improves the efficiency, stability, and reliability of the joint meter installation during engineering safety monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model.

[0014] Figure 2 It is a structural schematic diagram of the pre-tensioning mechanism of the utility model. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0017] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0018] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0019] In addition, the meaning of "and / or" appearing in the full text includes three parallel solutions. Taking "A and / or B as an example", it includes solution A, solution B, or a solution that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0020] like Figure 1 , 2 As shown, the joint meter fixing pre-tensioning auxiliary device of the utility model comprises a sleeve base 2 of the joint meter 1, the outer peripheral surface of the sleeve base 2 is a rough surface to increase the friction between the sleeve base 2 and the rock mass, and the sleeve base 2 can be lengthened as needed; a one-way card slot 3 is provided on the outer peripheral surface of the sleeve base 2, and a pre-tensioning mechanism is detachably fixed on the outer peripheral surface of the sleeve base 2 for pre-tensioning operation of the joint meter; the first barrel opening 2.1 of the sleeve base 2 is used for inserting the joint meter 1, and a connector 4 is threadedly connected to the second barrel opening 2.2 of the sleeve base 2, one end of the connector 4 is fixed with an anchor rod 5 extending out of the sleeve base 2, and the other end of the connector 4 is provided with a concave cavity 6 for connecting the joint meter 1.

[0021] Advantageously or exemplarily, Figure 2As shown, the pre-tensioning mechanism includes: a first fixing ring 7.1 and a second fixing ring 7.2, four pulling rods 8 are evenly fixed between the first and second fixing rings; two wedge pins 9 are evenly fixed on the inner circumference of the first fixing ring 7.1, and the wedge pins 9 are used to be clamped with the one-way clamping groove 3 on the outer circumference of the sleeve base 2; four positioning pins 10 are fixed on the outer end surface of the second fixing ring 7.2, and the positioning pins 10 are used to be plugged with the positioning holes on the seam meter base 11 to play a guiding and positioning role.

[0022] Advantageously or exemplarily, the inner circumferential surface of the cavity 6 is provided with internal threads for threading the joint meter 1 ; of course, other connection methods may also be used, such as pin connection or clamping.

[0023] Before installing the joint meter 1, check whether the joint meter 1 can work normally. Then, cast the frosted sleeve base 2 connected with the anchor rod 5 in the concrete. It is necessary to ensure that the sleeve base 2 is perpendicular to the concrete surface after casting, so as to ensure that the joint meter 1 measures the relative displacement between the structures after installation. After that, remove the casting formwork after reliable friction exists between the anchor rod 5 and the frosted sleeve base 2 and the concrete. First, put the pre-tensioning mechanism on the joint meter 1 in the direction from the tail to the head (do not push the wedge pin 9 to the one-way slot 3 at this time), and then push the joint meter 1 into the frosted sleeve base 2 and rotate it clockwise until the connection between the two is secure. Finally, the sensor of the joint meter 1 is pulled out to the 1 / 4 to 1 / 3 range position of the joint meter 1 through the pre-tensioning mechanism mounted on the periphery of the joint meter 1. Here, the joint meter 1 needs to be connected to the reading instrument for operation. At the same time, it should be noted that the joint meter 1 cannot be twisted after being pulled back from the frosted sleeve base 2. Afterwards, the wedge pin 9 of the pre-tensioning mechanism is engaged with the one-way slot 3 to fix the pre-tensioning position of the free end of the joint meter 1, and lubricant is applied to the position of the one-way slot 3. Then, the locating pin 10 at the tail of the pre-tensioning mechanism is engaged in the locating slot on the joint meter base 11 to complete the pre-tensioning of the joint meter.

[0024] The working principle of the utility model is briefly described as follows: under the action of the frictional resistance between the anchor rod 5, the outer peripheral rough surface of the sleeve base 2 and the soil or concrete, the connector 4 threadedly connected to the top of the joint meter 1 can be firmly fixed in the soil, thereby ensuring the accuracy of the displacement change value between the structures measured by the joint meter 1, and also strengthening the protection of the joint meter 1. In addition, the joint meter 1 is constrained by the positioning pin 10, the wedge pin 9 and the one-way slot 3, and the joint meter 1 can be pre-tensioned accurately and quickly, thereby ensuring that the joint meter 1 always works in a high-precision range. At the same time, the pre-tensioning mechanism of the hollow cylindrical structure also strengthens the integrity of the joint meter 1 structure, further improving the survival rate of the joint meter 1 installation.

Claims

1. A joint meter fixed pre-tensioning auxiliary device, comprising a sleeve base of the joint meter; characterized in that: The outer peripheral surface of the sleeve base is a rough surface, and a one-way slot is opened on the outer peripheral surface of the sleeve base. A pre-tensioning mechanism is detachably fixed on the outer peripheral surface of the sleeve base; the first barrel opening of the sleeve base is used for inserting the joint meter, and a connector is threaded in the second barrel opening of the sleeve base, one end of the connector is fixed with an anchor rod extending out of the sleeve base, and the other end of the connector is opened with a concave cavity for connecting the joint meter.

2. The joint meter fixing pre-tensioning auxiliary device according to claim 1 is characterized in that: The pre-tensioning mechanism comprises: a first fixing ring and a second fixing ring, at least two pulling rods are evenly fixed between the first and second fixing rings, at least one wedge-shaped pin is fixed on the inner circumference of the first fixing ring, and at least one positioning pin is fixed on the outer end surface of the second fixing ring.

3. The joint meter fixing pre-tensioning auxiliary device according to claim 1 or 2, characterized in that: The inner peripheral surface of the concave cavity is provided with internal threads.

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