Embedded joint meter with high sealing performance

Abstract

The utility model relates to the technical field of joint meters, in particular to a high-tightness embedded joint meter, which comprises a protective tube, a protective tube seat mounted at one end of the protective tube, a joint meter main body detachably inserted into the protective tube, and an observation cable fixed at one end, far away from the protective tube, of the joint meter main body, a sealing check ring is arranged at the end, away from the protection pipe base, of the protection pipe, a center through hole matched with the joint meter body is formed in the center of the sealing check ring in a penetrating mode, and a plurality of first mounting holes fixedly connected with a pouring formwork are formed in the edge of the sealing check ring. And the sealing check ring is provided with the central through hole matched with the joint meter main body and the first mounting hole used for being fixedly mounted with the pouring template, so that the joint meter and the pouring template are convenient to disassemble and assemble in the early stage, the sealing performance between the joint meter main body and the protective pipe can be improved in the later stage, and the measurement accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of crack gauges, in particular to a high-sealing embedded crack gauge. Background Technique

[0002] Embedded crack gauges are mainly used for long-term installation inside and on the surface of concrete structures or other material structures to measure the opening degree (displacement) of expansion joints or peripheral joints of structures. It includes a pipe seat, a protective tube, a displacement gauge, a rear connecting ring, an observation cable, etc. The inside of the displacement gauge consists of a sliding measuring rod, a vibrating wire, an exciting electromagnetic coil, a temperature measuring element, etc. During assembly, one end of the crack gauge body is inserted into the protective tube, and the other end extends outside the protective tube. The protective tube and the crack gauge body are respectively located inside the concrete poured successively, or inside the rock mass and the poured concrete. When the measured structure undergoes displacement, it will drive the change of the crack gauge, and the stress change is transmitted to the vibrating wire through the front and rear seats, thereby changing the vibration frequency of the vibrating wire. The electromagnetic coil excites the vibrating wire and measures its vibration frequency, and the frequency signal is transmitted to the reading device through the observation cable, and then the displacement of the measured structure can be measured.

[0003] One end of the existing embedded crack gauge is detachably installed with a protective tube cover. During assembly, the protective tube cover needs to be fixed to one end of the protective tube first, and then the protective tube cover is fixedly connected to the casting formwork through bolts. Then, concrete is poured outside the protective tube. After the concrete solidifies, the bolts are removed, and the casting formwork is removed to see the protective tube cover. Then, the protective tube cover is removed, and the end of the crack gauge with the sliding measuring rod can be inserted into the protective tube and fixed to the pipe seat. Later, concrete is poured at the other end of the crack gauge, and the change of the gap between the successively poured concretes is detected through the displacement of the sliding measuring rod. However, the protective tube cover is generally threadedly arranged inside the protective tube, and the disassembly and assembly are relatively troublesome. At the same time, when installing the crack gauge, when concrete or other materials enter the protective tube and fill the space between the protective tube and the crack gauge, it may affect the relative movement of the two, and then lead to inaccurate measurement results. Summary of the Invention

[0004] The purpose of the utility model is to provide a high-sealing embedded crack gauge to solve the problems put forward in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A high-sealing embedded crack gauge, including a protective tube, a pipe seat installed at one end of the protective tube, a crack gauge body detachably inserted into the protective tube, and an observation cable fixed at the end of the crack gauge body away from the protective tube. A sealing retaining ring is provided at the end of the protective tube away from the pipe seat, and a central through hole adapted to the crack gauge body is provided through the center of the sealing retaining ring. A plurality of first mounting holes for fixedly connecting to the casting formwork are provided at the edge of the sealing retaining ring.

[0006] Furthermore, a sealing ring is installed on the inner side wall of the central through hole.

[0007] Further, a sealing baffle is detachably installed inside the central through hole.

[0008] Further, a plurality of positioning blocks are arranged on the outer peripheral edge of the sealing baffle, and second mounting holes matching the first mounting holes are penetrated through the positioning blocks. An arc-shaped sliding groove for accommodating the rotation of the positioning blocks is arranged on the inner side wall of the central through hole, and a plugging hole for accommodating the positioning blocks to be inserted into the arc-shaped sliding groove is arranged at one end of the sealing retaining ring. The first mounting hole is arranged at one end of the arc-shaped sliding groove far from the plugging hole.

[0009] Further, a second plugging portion adapted to the protection tube is arranged at one end of the sealing retaining ring, and the second plugging portion is in threaded connection with the protection tube.

[0010] Further, the protection tube seat includes an end cover and a first plugging portion fixed to one end of the end cover, and the first plugging portion is in threaded connection with the protection tube.

[0011] Further, a sliding measuring rod is movably arranged at one end of the crack gauge body, and the sliding measuring rod is inserted into the protection tube and is in threaded connection with the protection tube seat.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] By arranging the sealing retaining ring on the high-sealing embedded crack gauge, and the central through hole adapted to the crack gauge body and the first mounting hole for fixedly installing with the casting formwork are arranged on the sealing retaining ring, it is convenient to disassemble and assemble with the casting formwork in the early stage, and the sealing performance between the crack gauge body and the protection tube can be improved in the later stage, thereby improving the measurement accuracy;

[0014] By detachably installing the sealing baffle inside the central through hole, the sealing performance of the protection tube during the first pouring of concrete can be improved, preventing the concrete from entering the inside of the protection tube and affecting the installation of the crack gauge body, and meanwhile, it is convenient to disassemble and assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional structural diagram of the present utility model;

[0016] Figure 2 is an exploded view of the present utility model;

[0017] Figure 3 is a sectional structural diagram of the present utility model;

[0018] Figure 4 is an exploded view of the assembly state of the protection tube and the casting formwork of the present utility model;

[0019] Figure 5 is a sectional structural diagram of the assembly state of the protection tube and the casting formwork of the present utility model;

[0020] Figure 6 Schematic three-dimensional structure diagram of the sealing retaining ring of the present utility model;

[0021] In the figure: 1, protection tube; 2, protection tube seat; 201, end cover; 202, first insertion part; 3, crack meter main body; 301, sliding measuring rod; 4, observation cable; 5, sealing retaining ring; 501, central through hole; 502, first mounting hole; 503, insertion hole; 504, arc-shaped sliding groove; 505, second insertion part; 6, sealing ring; 7, casting formwork; 8, sealing baffle; 801, positioning block; 802, second mounting hole; 9, fixing bolt. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. In the description of the present utility model, it should be noted that the descriptions of terms such as "first" and "second" are only for the purpose of description, and do not particularly refer to the meaning of order or sequence, nor are they used to limit the present utility model. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. For the terms "including" and any deformation thereof in the specification and claims of the present utility model and the above-mentioned drawings, the intention is to cover non-exclusive inclusion.

[0023] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "setting" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations. In addition, in the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0024] Please refer to Figure 1-6, An embodiment provided by the present utility model: a high-sealing embedded joint meter, which includes a protection tube 1, a protection tube seat 2 installed at one end of the protection tube 1, a joint meter main body 3 detachably inserted into the interior of the protection tube 1, and an observation cable 4 fixed to the end of the joint meter main body 3 away from the protection tube 1. The protection tube seat 2 includes an end cover 201 and a first insertion part 202 fixed to one end of the end cover 201. The first insertion part 202 is threadedly connected to the protection tube 1.

[0025] The specific structure of the joint meter main body 3 is prior art, mainly including a sliding measuring rod 301, a vibrating wire, an exciting electromagnetic coil, a temperature measuring element, etc. During assembly, the sliding measuring rod 301 is inserted into the interior of the protection tube 1 and threadedly connected to the first insertion part 202 of the protection tube seat 2. When the measured structure undergoes displacement, it will drive the change of the joint meter main body 3, and the stress change is transmitted to the vibrating wire through the front and rear seat bodies, thereby changing the vibration frequency of the vibrating wire. The electromagnetic coil excites the vibrating wire and measures its vibration frequency. The frequency signal is transmitted to the reading device through the observation cable 4, and then the displacement of the measured structure can be measured. The temperature measuring element synchronously measures the temperature value of the embedding point.

[0026] A sealing retaining ring 5 is provided at the end of the protection tube 1 away from the protection tube seat 2. In this embodiment, a second insertion part 505 adapted to the protection tube 1 is provided at one end of the sealing retaining ring 5, and the second insertion part 505 is threadedly connected to the protection tube 1, which is convenient for disassembly and assembly. A central through hole 501 adapted to the joint meter main body 3 is provided through the center of the sealing retaining ring 5. After the joint meter main body 3 passes through the central through hole 501 and is inserted into the interior of the protection tube 1, the joint meter main body 3 is closely attached to the inner side wall of the central through hole 501, which can prevent the entry of external concrete, etc. into the interior of the protection tube 1, affecting the relative movement between the protection tube 1 and the joint meter main body 3, and then affecting the measurement accuracy.

[0027] A number of first mounting holes 502 for fixedly connecting to the casting formwork 7 are provided at the edge of the sealing retaining ring 5. In this embodiment, two first mounting holes 502 are provided, and other numbers can also be set according to needs. It can be fixedly connected to the casting formwork 7 through fixing bolts 9.

[0028] Further, referring to the appendix Figure 6, a sealing baffle 8 is detachably installed inside the central through hole 501. Two positioning blocks 801 are arranged on the outer peripheral edge of the sealing baffle 8, and a second mounting hole 802 matching the first mounting hole 502 is penetrated through the positioning block 801. An arc-shaped sliding groove 504 for accommodating the rotation of the positioning block 801 is arranged on the inner side wall of the central through hole 501. The arc-shaped sliding grooves 504 correspond to the positioning blocks 801 one by one. One end of the sealing ring 5 is provided with a plugging hole 503 for accommodating the positioning block 801 to insert into the arc-shaped sliding groove 504. The first mounting hole 502 is arranged at one end of the arc-shaped sliding groove 504 away from the plugging hole 503. After inserting the positioning block 801 into the arc-shaped sliding groove 504 through the plugging hole 503 and rotating it to the end, then align the first mounting hole 502 and the second mounting hole 802, and then install and fix the sealing ring 5 and the sealing baffle 8 to the casting formwork 7 simultaneously through the fixing bolt 9, which improves the sealing performance of the protection tube 1 during pouring and is convenient for the disassembly of the sealing baffle 8 in the later stage.

[0029] Working principle: During assembly, thread-fix the protection tube seat 2 at one end of the protection tube 1, insert the sealing baffle 8 inside the central through hole 501, let the positioning block 801 pass through the plugging hole 503 and insert into the arc-shaped sliding groove 504, and then rotate the sealing baffle 8 until the positioning block 801 abuts against the end of the arc-shaped sliding groove 504. At this time, the first mounting hole 502 and the second mounting hole 802 are aligned. Then, pass the fixing bolt 9 through the first mounting hole 502 and the second mounting hole 802 to fix the sealing ring 5 and the sealing baffle 8 to the inner side of the casting formwork 7. The other end of the protection tube 1 is thread-connected to the sealing ring 5. Then, pour concrete on the outer side of the protection tube 1. After the concrete solidifies, remove the fixing bolt 9, remove the casting formwork 7, and then rotate the sealing baffle 8. After aligning the positioning block 801 with the plugging hole 503, the sealing baffle 8 can be removed. The end of the crack gauge body 3 can be directly inserted into the protection tube 1. The sliding measuring rod 301 is thread-fixed to the first plugging part 202. Adjust the measuring range of the crack gauge (as required by the design) and record the initial reading. The crack gauge body 3 is closely attached to the sealing ring 5 to prevent concrete and the like from entering the protection tube 1.

[0030] Embodiment 2, on the basis of Embodiment 1, a sealing ring 6 is installed on the inner side wall of the central through hole 501 to further improve the sealing performance between the sealing ring 5 and the crack gauge body 3.

[0031] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

Claims

1. A highly sealed embedded joint meter, comprising a protective tube (1), a protective tube seat (2) mounted at one end of the protective tube (1), a joint meter body (3) detachably plugged into the protective tube (1), and an observation cable (4) fixed to an end of the joint meter body (3) away from the protective tube (1), characterized in that: A sealing retaining ring (5) is provided at one end of the protective tube (1) away from the protective tube seat (2), and a central through hole (501) adapted to the joint meter body (3) is provided through the center of the sealing retaining ring (5), and a plurality of first mounting holes (502) fixedly connected to the casting template (7) are provided at the edge of the sealing retaining ring (5).

2. The high-sealing embedded joint meter according to claim 1, characterized in that: A sealing ring (6) is installed on the inner side wall of the central through hole (501).

3. The high-sealing embedded joint meter according to claim 1, characterized in that: A sealing baffle (8) is detachably mounted on the inner side of the central through hole (501).

4. The high-sealing embedded joint meter according to claim 3, characterized in that: A plurality of positioning blocks (801) are arranged on the outer periphery of the sealing baffle (8), and a second mounting hole (802) matching the first mounting hole (502) is penetrated through the positioning block (801), an arc-shaped slide groove (504) for accommodating the rotation of the positioning block (801) is arranged on the inner side wall of the central through hole (501), and a plug-in hole (503) for accommodating the positioning block (801) to be inserted into the arc-shaped slide groove (504) is arranged at one end of the sealing retaining ring (5), and the first mounting hole (502) is arranged at one end of the arc-shaped slide groove (504) away from the plug-in hole (503).

5. The high-sealing embedded joint meter according to claim 1, characterized in that: One end of the sealing retaining ring (5) is provided with a second plug-in portion (505) adapted to the protective tube (1), and the second plug-in portion (505) is threadedly connected to the protective tube (1).

6. The high-sealability embedded joint meter according to claim 1, characterized in that: The protective tube seat (2) comprises an end cover (201) and a first plug-in portion (202) fixed to one end of the end cover (201), wherein the first plug-in portion (202) is threadedly connected to the protective tube (1).

7. The high-sealability embedded joint meter according to claim 1, characterized in that: A sliding measuring rod (301) is movably provided at one end of the seam meter body (3), and the sliding measuring rod (301) is inserted into the interior of the protective tube (1) and is threadedly connected to the protective tube seat (2).

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