Foundation bolt anti-corrosion protection device

Abstract

The utility model discloses a foundation bolt anti-corrosion protection device, and relates to the technical field of foundation bolt anti-corrosion protection devices. The device comprises a base, a foundation bolt and a protective sleeve, wherein the threaded end of the foundation bolt penetrates through the base and is in threaded fit with a fixing nut; a plurality of limiting protrusions are arranged on the base in a circumferential array mode, and the foundation bolt, the fixing nut and the multiple limiting protrusions are all located in the protective sleeve. The protective sleeve is arranged on the base, a plurality of limiting grooves are formed in the inner wall of the protective sleeve in a circumferential array mode, and an anti-corrosion layer is arranged in the protective sleeve. The anti-corrosion layer is poured into the protective sleeve, the protective sleeve, the limiting groove, the annular groove and the limiting opening groove in the limiting protrusion are filled with the anti-corrosion layer, the probability that the anti-corrosion layer rotates on the base is conveniently reduced through the limiting protrusion, and then the probability that the fixing nut retreats is conveniently reduced.

Description

Technical Field

[0001] The utility model belongs to the field of anti-corrosion protection devices for anchor bolts, and in particular relates to an anti-corrosion protection device for anchor bolts. Background Art

[0002] Anchor bolts are important fastening and connection components for many equipment in nuclear power plants. They have high strength requirements, and some important anchor bolts also have clear seismic requirements. Once the anchor bolts have serious corrosion problems, they will bring serious safety hazards and even affect the safe operation of nuclear power plants. Anchor bolts are generally made of high-strength steel. In order to control the corrosion of anchor bolts, hot-dip galvanizing is generally used for corrosion protection. During the tightening process of nuts, the bolts are prone to damage the anti-corrosion layer, resulting in atmospheric corrosion of the bolts and nuts during service. After the bolts are tightened, paint is generally used to further prevent corrosion of the bolts, but the paint has the problem of aging, the maintenance workload is large, and the nuts are difficult to remove after the paint solidifies. Wax injection corrosion protection is widely used in the automotive industry, has good corrosion protection effect, and low maintenance workload. The wax injection corrosion protection method is to heat and melt solid paraffin, and inject liquid paraffin with good fluidity into the prefabricated chamber. After the liquid paraffin solidifies, the corrosion protection of the chamber and the components in the chamber is completed. Wax injection corrosion protection requires that there is a chamber outside the component to prevent the liquid paraffin from overflowing during the wax injection process.

[0003] The Chinese patent application number CN202221853004.0 discloses an anchor bolt anti-corrosion protection device, which is arranged on the base of the nuclear power plant equipment, and includes: a protective sleeve, the protective sleeve includes a receiving chamber with an opening, the anchor bolt is located in the receiving chamber, and one end of the protective sleeve is connected to the base; an anti-corrosion layer, the anti-corrosion layer is located in the receiving chamber, and the anti-corrosion layer is wrapped on the anchor bolt. The utility model provides a protective sleeve and an anti-corrosion layer, and the protective cover plays a supporting and limiting role on the anti-corrosion layer, so that the anchor bolt in the anti-corrosion layer is completely isolated from the air, and plays a good anti-corrosion role. The anchor bolt anti-corrosion protection device in the application, after the anti-corrosion layer is injected into the protective sleeve, maintains the anti-corrosion property of the anchor bolt, but at the same time, the nut on the anchor bolt is only threadedly matched on the anchor bolt by the extrusion force on the base, and it is easy to have a thread backing phenomenon after a period of use, which affects the fixing effect of the nut.

[0004] In view of this, the present utility model is proposed. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide an anti-corrosion protection device for anchor bolts.

[0006] In order to solve the above technical problems, the basic concept of the technical solution adopted by the utility model is:

[0007] An anchor bolt anti-corrosion protection device comprises a base, an anchor bolt, and a protective sleeve, wherein the threaded end of the anchor bolt passes through the thread of the base and is matched with a fixing nut;

[0008] The base has a plurality of limiting protrusions in a circumferential array, and the anchor bolts, the fixing nuts, and the plurality of limiting protrusions are all located in a protective sleeve;

[0009] The protective cover is arranged on the base, the inner wall of the protective cover is provided with a plurality of limiting grooves in a circumferential array, an anti-corrosion layer is arranged inside the protective cover, and the anti-corrosion layer is a paraffin layer.

[0010] Optionally, a limiting opening groove is provided on the side of the limiting protrusion away from the anchor bolt, an annular groove is provided on the inner wall of the protective sleeve, and the axis of the annular groove coincides with the axis of the protective sleeve, the annular groove is connected to the limiting opening groove, the limiting opening groove and the bottom surface of the inner wall of the annular groove are higher than the height of the upper side surface of the base, and the top surface of the inner wall of the limiting opening groove is lower than the height of the upper side surface of the limiting protrusion, so as to reduce the probability of the anti-corrosion layer rotating on the base through the limiting protrusion, thereby reducing the probability of the fixing nut being stripped, and the anti-corrosion layer is filled into the annular groove and the limiting opening groove.

[0011] Optionally, an annular placement groove is provided at the bottom end of the protective sleeve, and a sealing ring is provided in the annular placement groove to facilitate sealing the distance between the protective sleeve and the base through the sealing ring.

[0012] Optionally, an annular groove is provided at the bottom end of the base, and the annular groove corresponds to the annular placement groove, and the lower part of the sealing ring is located in the annular groove, so that the sealing ring is placed in the annular groove on the base, and then the protective cover is placed on the upper part of the sealing ring through the annular placement groove, thereby facilitating the sealing ring to be placed on the base Stability.

[0013] Optionally, a through hole is provided on the base, and the threaded end of the anchor bolt passes through the through hole and cooperates with the fixing nut thread, so as to facilitate the fitting of the fixing nut thread to one end of the anchor bolt passing through the base.

[0014] After adopting the above technical solution, the utility model has the following beneficial effects compared with the prior art. Of course, any product implementing the utility model does not necessarily need to achieve all the advantages described below at the same time:

[0015] By pouring the anti-corrosion layer into the protective cover and filling the protective cover, the limiting groove, the annular groove and the limiting opening groove on the limiting protrusion, the probability of the anti-corrosion layer rotating on the base can be reduced through the limiting protrusion, thereby reducing the probability of the fixing nut being stripped. By setting the limiting groove, the synchronization between the anti-corrosion layer and the protective cover can be improved. By setting the anti-corrosion layer to fill the annular groove and the limiting opening groove, the protective cover can be reduced from sliding along the height direction on the base, thereby further reducing the probability of the fixing nut being stripped.

[0016] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described below are only some embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of an embodiment of the utility model;

[0019] Figure 2 This is a cross-sectional structural diagram of an embodiment of the utility model;

[0020] Figure 3 This is a schematic diagram of the base structure of an embodiment of the utility model;

[0021] Figure 4 This is a schematic diagram of the anti-corrosion layer structure of an embodiment of the utility model;

[0022] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0023] Base 1, limiting protrusion 101, limiting opening groove 102, annular groove 103, through hole 104, anchor bolt 2, protective sleeve 3, limiting groove 301, annular groove 302, annular placement groove 303, sealing ring 304, fixing nut 4, anti-corrosion layer 5.

[0024] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0025] The utility model will now be further described in detail with reference to the accompanying drawings.

[0026] See also Figure 1-4 As shown, in this embodiment, a foundation bolt anti-corrosion protection device is provided, comprising a base 1, an anchor bolt 2, and a protective sleeve 3, wherein the threaded end of the anchor bolt 2 passes through the base 1 and is threadedly matched with a fixing nut 4;

[0027] The base 1 has a plurality of limiting protrusions 101 arranged in a circumferential array, and the anchor bolts 2, the fixing nuts 4, and the plurality of limiting protrusions 101 are all located in the protective cover 3;

[0028] The protective sleeve 3 is arranged on the base 1, and the inner wall of the protective sleeve 3 has a plurality of limit grooves 301 in a circumferential array. An anti-corrosion layer 5 is arranged inside the protective sleeve 3, and the anti-corrosion layer 5 is a paraffin layer. The height of the upper side of the protective sleeve 3 is higher than the height of the upper side of the anchor bolt 2, so that the anti-corrosion layer 5 can completely seal the anchor bolt 2.

[0029] By pouring the anti-corrosion layer 5 into the protective sleeve 3, the anti-corrosion layer 5 is filled into the protective sleeve 3, the limiting groove 301, the annular groove 302 and the limiting opening groove 102 on the limiting protrusion 101, it is convenient to reduce the probability of the anti-corrosion layer 5 rotating on the base 1 through the limiting protrusion 101, thereby facilitating reducing the probability of the fixing nut 4 being stripped of the thread. By setting the limiting groove 301, it is convenient to improve the synchronization between the anti-corrosion layer 5 and the protective sleeve 3. By setting the anti-corrosion layer 5 to fill the annular groove 302 and the limiting opening groove 102, it is convenient to reduce the sliding of the protective sleeve 3 on the base 1 along the height direction, thereby facilitating further reducing the probability of the fixing nut 4 being stripped of the thread.

[0030] The limiting protrusion 101 of this embodiment is provided with a limiting opening groove 102 on the side away from the anchor bolt 2, and the inner wall of the protective sleeve 3 is provided with an annular groove 302, and the axis of the annular groove 302 coincides with the axis of the protective sleeve 3, and the annular groove 302 is connected with the limiting opening groove 102, and the bottom surface height of the limiting opening groove 102 and the inner wall of the annular groove 302 is higher than the height of the upper side surface of the base 1, and the top surface of the inner wall of the limiting opening groove 102 is lower than the height of the upper side surface of the limiting protrusion 101, so as to reduce the probability of the anti-corrosion layer 5 rotating on the base 1 through the limiting protrusion 101, thereby facilitating reducing the probability of the fixing nut 4 being stripped of the thread, and by arranging the anti-corrosion layer 5 to fill the annular groove 302 and the limiting opening groove 102, it is convenient to reduce the sliding of the protective sleeve 3 on the base 1 along the height direction, thereby facilitating further reducing the probability of the fixing nut 4 being stripped of the thread.

[0031] In this embodiment, an annular placement groove 303 is provided at the bottom end of the protective sleeve 3, and a sealing ring 304 is provided in the annular placement groove 303, so as to seal the distance between the protective sleeve 3 and the base 1 through the sealing ring 304, thereby improving the sealing between the protective sleeve 3 and the base 1.

[0032] In this embodiment, an annular groove 103 is provided at the bottom end of the base 1, and the annular groove 103 corresponds to the annular placement groove 303, and the lower part of the sealing ring 304 is located in the annular groove 103, so that the sealing ring 304 is placed in the annular groove 103 on the base 1, and then the protective cover 3 is placed on the upper part of the sealing ring 304 through the annular placement groove 303, thereby facilitating the sealing ring 304 to improve the stability of the protective cover 3 on the base 1 and prevent the protective cover 3 from sliding on the base 1.

[0033] In this embodiment, a through hole 104 is provided on the base 1, and the threaded end of the anchor bolt 2 passes through the through hole 104 and is threadedly matched with the fixing nut 4, so that the fixing nut 4 can be threadedly matched with one end of the anchor bolt 2 passing through the base 1, so as to facilitate the fastening and installation work by matching the anchor bolt 2 with the fixing nut 4.

[0034] Working principle: thread the fixing nut 4 on the end of the anchor bolt 2 passing through the base 1, then place the sealing ring 304 in the annular groove 103 on the base 1, and then put the protective sleeve 3 on the upper part of the sealing ring 304 through the annular placement groove 303, so as to improve the stability of the protective sleeve 3 on the base 1 through the sealing ring 304, and prevent the protective sleeve 3 from sliding on the base 1, and seal the distance between the protective sleeve 3 and the base 1 through the sealing ring 304, and then pour the anti-corrosion layer 5 into the protective sleeve 3, so that the anti-corrosion layer 5 is filled to the protective sleeve 3. The sleeve 3, the limiting groove 301, the annular groove 302 and the limiting opening groove 102 on the limiting protrusion 101 can reduce the probability of the anti-corrosion layer 5 rotating on the base 1 through the limiting protrusion 101, thereby reducing the probability of the fixing nut 4 being stripped. By setting the limiting groove 301, it is easy to improve the synchronization between the anti-corrosion layer 5 and the protective sleeve 3. By setting the anti-corrosion layer 5 to fill the annular groove 302 and the limiting opening groove 102, it is easy to reduce the sliding of the protective sleeve 3 on the base 1 along the height direction, thereby further reducing the probability of the fixing nut 4 being stripped.

[0035] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0036] The present invention is not limited to the above-mentioned implementation modes. Anyone should be aware of the structural changes made under the inspiration of the present invention. Any technical solution that is the same or similar to the present invention falls within the protection scope of the present invention. The technology, shape, and structure that are not described in detail in the present invention are all known technologies.

Claims

1. A foundation bolt anti-corrosion protection device, characterized in that: include: A base (1), an anchor bolt (2), and a protective sleeve (3), wherein the threaded end of the anchor bolt (2) passes through the thread of the base (1) and is matched with a fixing nut (4); The base (1) has a plurality of limiting protrusions (101) arranged in a circular array, and the anchor bolt (2), the fixing nut (4), and the plurality of limiting protrusions (101) are all located inside the protective sleeve (3); The protective sleeve (3) is arranged on the base (1), the inner wall of the protective sleeve (3) has a plurality of limiting grooves (301) arranged in a circumferential array, and an anti-corrosion layer (5) is arranged inside the protective sleeve (3).

2. The anchor bolt anti-corrosion protection device according to claim 1, characterized in that: A limiting opening groove (102) is provided on the side of the limiting protrusion (101) away from the anchor bolt (2), an annular groove (302) is provided on the inner wall of the protective sleeve (3), and the axis of the annular groove (302) coincides with the axis of the protective sleeve (3), and the annular groove (302) is connected to the limiting opening groove (102).

3. The anchor bolt anti-corrosion protection device according to claim 2, characterized in that: The bottom surface heights of the inner walls of the limiting opening groove (102) and the annular groove (302) are higher than the upper side height of the base (1), and the top surface height of the inner wall of the limiting opening groove (102) is lower than the upper side height of the limiting protrusion (101).

4. The anchor bolt anti-corrosion protection device according to claim 1, characterized in that: The bottom end of the protective sleeve (3) is provided with an annular placement groove (303), and a sealing ring (304) is provided in the annular placement groove (303).

5. The anchor bolt anti-corrosion protection device according to claim 4, characterized in that: An annular groove (103) is provided at the bottom end of the base (1), and the annular groove (103) corresponds to the annular placement groove (303), and the lower part of the sealing ring (304) is located in the annular groove (103).

6. The anchor bolt anti-corrosion protection device according to claim 1, characterized in that: The base (1) is provided with a through hole (104), and the threaded end of the anchor bolt (2) passes through the through hole (104) and is threadably matched with the fixing nut (4).

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