Bridge external prestressing anchoring device

Abstract

The application discloses a bridge external prestress anchoring device, and relates to the technical field of anchoring devices, which comprises an anchor box, a protective pipe, a prestressed cable, an anchoring plate, a supporting plate and an anchor device, further comprises an in-box filling assembly and a through-hole sealing assembly; the bottom of the anchor box is provided with a ring-shaped sealing ring at the contact position with the bridge; the in-box filling assembly comprises an in-box expanding bag; the in-box expanding bag is a rubber elastic bag with built-in paraffin, and an injection channel pipe is fixed to the in-box expanding bag and arranged in the anchor box during installation of the anchor box; the through-hole sealing assembly is used for sealing the through hole and comprises a ring-shaped soft bag, wherein the ring-shaped soft bag is a ring-shaped rubber soft bag, and an injection pipe is fixed to the ring-shaped soft bag; the ring-shaped soft bag is sleeved on the prestressed cable, and after the in-box expanding bag is filled, an operator pumps paraffin into the ring-shaped soft bag through the injection pipe by using a wax pumping assembly, so that the ring-shaped soft bag is expanded; the technical effect that the sealing effect of the bridge external prestress anchoring device is relatively good and the prestressed cable is not prone to corrosion damage is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of anchoring devices, in particular to a bridge external prestress anchoring device. BACKGROUND

[0002] External prestress refers to the prestress generated by the prestressed cable arranged outside the main body of the bearing structure, and the prestressed cable transmits the prestress through anchoring and turning entities; external prestress reinforcement can greatly improve the bending stiffness of the concrete beam, significantly reduce the deflection of the beam, and under the beneficial effect of reinforcing prestress, the cracks of the beam tend to be reduced or even closed, the strain of the tensile reinforcement is greatly reduced, and the stress increment of the prestressed reinforcement is increased; in addition, the use of external prestressed reinforcement is easy to check, easy to replace and beneficial to construction.

[0003] The prestressed cable is usually fixed to the outside of the bridge by an anchor, and the end of the prestressed cable needs to be stripped in actual use in order to be connected with the anchor; the stripped end of the prestressed cable is exposed in the air and is easily corroded and damaged, so a anchor box is usually provided outside the anchor to protect the prestressed cable. However, the prestressed cable needs to pass through the anchor box horizontally, so a through hole is needed to be provided on the anchor box for the prestressed cable to pass through; due to processing and operation reasons, the through hole cannot be tightly connected with the prestressed cable, and water vapor in the air can still enter the anchor box through the through hole, and the water vapor gathered in the semi-closed anchor box is difficult to dissipate, which is more likely to cause corrosion of the prestressed cable.

[0004] In view of the above problems, a bridge external prestress anchoring device is disclosed in the Chinese patent with the authorization publication number CN110295550B, which comprises an anchor box, a group of symmetrical side walls on the anchor box are provided with through holes for the prestressed cable to pass through, an anchor plate is horizontally arranged in the anchor box, a support plate is vertically arranged on the anchor plate, a fixing hole for the prestressed cable to pass through is arranged on the support plate, and an anchor for fixing the prestressed cable is arranged on the support plate; a protection pipe is connected to one of the through holes on the anchor box, and a sealing ring is connected to the other through hole of the anchor box, and the sealing ring is located between the prestressed cable and the through hole.

[0005] Although the above-mentioned scheme can reduce the amount of water vapor entering the anchor box to a certain extent and thus reduce the probability of corrosion damage of the prestressed cable, the sealing performance thereof completely relies on the sealing ring, and once the sealing ring is damaged or improperly installed, the sealing effect is easily lost, which leads to damage of the bridge external prestress anchoring device. SUMMARY

[0006] The embodiment of the present application provides a bridge external prestress anchoring device, which solves the technical problem that the sealing effect of the bridge external prestress anchoring device in the prior art completely depends on a sealing ring, and once the sealing ring is damaged or improperly installed, the sealing effect is easily lost, and the prestress cable is easily corroded and damaged, and achieves the technical effect that the sealing effect of the bridge external prestress anchoring device is relatively good and the prestress cable is not easily corroded and damaged.

[0007] The embodiment of the present application provides a bridge external prestress anchoring device, which solves the technical problem that the sealing effect of the bridge external prestress anchoring device in the prior art completely depends on a sealing ring, and once the sealing ring is damaged or improperly installed, the sealing effect is easily lost, and the prestress cable is easily corroded and damaged, and achieves the technical effect that the sealing effect of the bridge external prestress anchoring device is relatively good and the prestress cable is not easily corroded and damaged.

[0008] The bottom of the anchor box is provided with a ring-shaped sealing ring at a contact position with the bridge.

[0009] The in-box filling assembly comprises an in-box expanding bladder.

[0010] The in-box expanding bladder is a rubber elastic bladder with built-in paraffin, and an injection channel pipe is fixed to the in-box expanding bladder; the in-box expanding bladder is arranged in the anchor box during installation of the anchor box, and after the anchor box is fixed, liquid paraffin heated by a pump wax assembly is injected into the in-box expanding bladder, the in-box expanding bladder is then expanded, most of the gas in the internal space of the anchor box is squeezed out, and the prestress cable in the box is wrapped.

[0011] The through hole sealing assembly is used for sealing the through hole and comprises a ring-shaped soft bladder, and the ring-shaped soft bladder is a ring-shaped rubber soft bladder, and an injection pipe is fixed to the ring-shaped soft bladder; the ring-shaped soft bladder is sleeved on the prestress cable, after the in-box expanding bladder is filled, an operator pumps paraffin into the ring-shaped soft bladder through the injection pipe by using the pump wax assembly, the ring-shaped soft bladder is then expanded and abuts against the through hole, the through hole is thus sealed, and the injection pipe is sealed after pumping is completed.

[0012] Preferably, the ring-shaped soft bladder comprises a paraffin bladder and a cladding bladder, the paraffin bladder is a ring-shaped bladder body, and the inside of the paraffin bladder is used for filling paraffin.

[0013] The cladding bladder is a ring-shaped tubular bladder body, the paraffin bladder is cladded in the ring-shaped tubular bladder body, the cladding bladder comprises a first bladder body and a second bladder body.

[0014] The first bladder body and the second bladder body are both ring-shaped rubber bladders, the first bladder body is sleeved on the second bladder body, an annular tubular space is formed between the first bladder body and the second bladder body, the first bladder body and the second bladder body are fixed together in a sewn manner, and the annular tubular space is divided into a plurality of square space.

[0015] The square space is filled with magnetic powder; due to the magnetic powder, the ring-shaped soft bladder is adsorbed on the inner wall of the through hole.

[0016] Preferably, the ring-shaped soft bladder is in a strip shape before installation and is bent into a ring shape during installation.

[0017] Preferably, a threaded pipe is fixed on the anchor box, coaxial with the through hole and fixed near the through hole; after the installation of the annular soft bag is completed, an annular cover plate is installed on the threaded pipe to shield the annular soft bag and reduce its aging.

[0018] Preferably, when installing the anchor box, a piece of scratch-proof cloth is first covered on the support plate and the anchor, and the scratch-proof cloth is a piece of scratch-proof cloth.

[0019] Preferably, the anchor box comprises a fixed box body and a top box, the fixed box body is a box structure with openings at the top and bottom, and is fixed on the bridge, and the top box is a box structure with an opening at the bottom and is detachably fixedly connected to the fixed box body to jointly form a box body with the fixed box body.

[0020] The through hole is located on the fixed box body; the number of the inflation bags in the box is multiple, and each is adhered to the fixed box body and the top box; when maintenance is needed, the top box can be removed and the inflation bags in the box can be pried open for maintenance.

[0021] Preferably, a longitudinal heat-conducting plate is fixed on the top box, the heat-conducting plate divides the top box into two parts, and can limit the deformation of the inflation bags in the box, thereby facilitating the prying open of the inflation bags in the box for maintenance.

[0022] Before the top box is removed, a heating blanket is first covered on the top box, and the heating blanket is an electric heating blanket.

[0023] The top box is heated before it is removed, thereby facilitating the softening of the paraffin in the anchor box, and thereby facilitating the prying open of the inflation bags in the box; the heat-conducting plate is made of metal and functions to conduct heat.

[0024] Preferably, the paraffin pumped into the annular soft bag is doped with 0.5% to 3% fibers and 3% to 7% gas, and the length of the fibers is 1 to 2 centimeters; when pumped, the gas pumped into the annular soft bag exists in the form of a large number of small bubbles; the fibers function to reduce the fluidity of the paraffin; if the paraffin in the annular soft bag melts, the gas bubbles doped in the paraffin will move upward to the top of the annular soft bag, thereby ensuring that the annular soft bag continuously expands and thereby ensuring the sealing effect.

[0025] Preferably, the paraffin pumping assembly comprises a wax bin, a pump body, a delivery pipe, an embedding head, and a pressure sensor.

[0026] The wax bin, the pump body, and the delivery pipe are each provided with an electric heating wire, thereby ensuring that the paraffin is in a liquid state during pumping; the embedding head is fixed at the end of the delivery pipe, is a conical pipe, can cooperate with the injection channel pipe, and functions as a joint; the pressure sensor is positioned on the delivery pipe, is signal-connected to a display screen positioned on the pump body, and is used to monitor the pressure in the delivery pipe and thereby judge the filling condition of the internal space of the anchor box.

[0027] When the internal space of the anchor box is substantially filled, stop the pump wax assembly from operating and block the injection channel pipe.

[0028] Preferably, the conveying pipe is fixed with a mixing assembly; the mixing assembly comprises a bearing box, a rotating column, a pump gas assembly and a hopper;

[0029] The bearing box is a box structure, two side partitions are fixed on the inner wall of the bearing box near the middle part, the side partitions are hard strips, and the two side partitions are symmetrically arranged; a strip-shaped closed capsule is fixed on the opposite surface of each side partition, the strip-shaped closed capsule is an elastic capsule body in a long strip shape, is communicated with the pump gas assembly, and expands and shrinks under the control of the pump gas assembly;

[0030] The rotating column is a cylinder, is rotationally connected to the inner wall of the bearing box, and rotates around its axis under the drive of the rotation driving assembly; the axial direction of the rotating column is the same as the length direction of the side partitions, and both ends of the rotating column abut against the inner wall of the bearing box;

[0031] The side wall of the rotating column is densely covered with a plurality of protrusions or pits, and a temperature adjusting assembly is positioned in the rotating column;

[0032] When the strip-shaped closed capsule expands, the strip-shaped closed capsule abuts against the side wall of the rotating column; at this time, the side partitions, the strip-shaped closed capsule and the rotating column divide the internal space of the bearing box into two closed spaces; the wall of the space located at the lower part is densely covered with resistance wires, and is provided with a paraffin inlet and a paraffin outlet, and the bottom of the space is provided with a gas inlet, and the paraffin outlet is provided with a detachable one-way valve; the wall of the space located at the upper part is provided with a gas blowing inlet, a gas permeable opening and a fiber inlet; the gas blowing inlet is fixed with a spray head;

[0033] The pump gas assembly is a combination of a gas pump and a gas valve, and is communicated with the gas inlet, the gas blowing inlet and the strip-shaped closed capsule;

[0034] The hopper is positioned at the top of the bearing box, is provided with an internal material distribution and blocking mechanism, is communicated with the fiber inlet, and timely inputs a certain amount of fibers into the space located at the upper part.

[0035] One or more technical solutions provided in the embodiments have at least the following technical effects or advantages:

[0036] The structure of the sealing assembly of the bridge external prestressed anchoring device in the prior art is optimized and improved, the annular paraffin capsule is used to block the through hole, and the elastic paraffin capsule is used to fill the internal space of the anchor box; the technical problem that the sealing effect of the bridge external prestressed anchoring device in the prior art completely depends on the sealing ring, and once the sealing ring is damaged or improperly installed, the sealing effect is easily lost, and the prestressed cable is easily corroded and damaged is effectively solved, and the technical effect that the sealing effect of the bridge external prestressed anchoring device is relatively good and the prestressed cable is not easily corroded and damaged is achieved. Attached Figure Description

[0037] Figure 1 This is a structural schematic diagram of the bridge external prestressed anchorage device of this application;

[0038] Figure 2 A schematic diagram of the external structure of the anchor box;

[0039] Figure 3 A simplified structural diagram of the annular soft capsule;

[0040] Figure 4 This is a cross-sectional view of the annular soft sac;

[0041] Figure 5 This is a schematic diagram of a partial structure of the capsule;

[0042] Figure 6 A simplified structural diagram of the inflatable bladder inside the box;

[0043] Figure 7 This is a schematic diagram showing the positional relationship between the outer and inner capsules.

[0044] Figure 8 A simplified structural diagram of an inflatable bladder inside an irregularly shaped box;

[0045] Figure 9 This is a schematic diagram showing the positional relationship between the fixed box and the top box;

[0046] Figure 10 This is a schematic diagram of the top box structure;

[0047] Figure 11 Here is a simplified structural diagram of the pump wax assembly;

[0048] Figure 12 This is a simplified structural diagram of a heating blanket;

[0049] Figure 13 A simplified diagram of the structure of the annular soft cyst after deformation;

[0050] Figure 14 A simplified structural diagram of a gas-filled annular soft capsule;

[0051] Figure 15 This is a schematic diagram of the internal structure of the mixed-in components;

[0052] Figure 16 This is a schematic diagram of the external structure of the mixed-in components;

[0053] Figure 17 Here is a simplified structural diagram of the rotating column;

[0054] Figure 18 This is a simplified diagram of the internal structure of the mixed-in component.

[0055] In the picture:

[0056] bridge 001, anchor box 010, through hole 011, fixed box 012, top box 013, heat-conducting plate 015, protective tube 020, prestressed cable 030, anchoring plate 040, support plate 050, anchor 060, anti-scratching cloth piece 070, desiccant bag 080, annular soft bag 110, injection tube 111, paraffin bag 112, coated bag 113, box-inflated large bag 120, injection channel tube 121, outer layer bag 122, inner layer bag 123, electric heating wire 130, pump wax assembly 140, pressure sensor 141, heating blanket 150, bearing box 161, side partition 162, strip-shaped closed bag 163, rotating column 164, rotating drive assembly 166, pump air assembly 167, stock bin 168. DETAILED DESCRIPTION

[0057] In order to facilitate the understanding of the present application, the present application will be described in more detail below with reference to the relevant drawings; the preferred embodiments of the present application are shown in the drawings, but the present application can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0058] It should be noted that the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only embodiment.

[0059] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used herein in the specification of the present application are only for the purpose of describing the specific embodiments and are not intended to limit the present application; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0060] Example one

[0061] As shown in Figures 1 to 6 the bridge external prestress anchoring device of the present application includes an anchor box 010 fixed on a bridge 001, a protective tube 020, a prestressed cable 030, an anchoring plate 040, a support plate 050, an anchor 060, a box-inflated assembly and a through hole sealing assembly.

[0062] The anchor box 010 is an open-bottom iron box fixed on the bridge 001 by bolts; the bottom of the anchor box 010 is provided with one or more annular grooves at the contact position with the bridge, and the grooves are filled with annular sealing rings; the sealing rings in the grooves are in contact with the bridge 001 after the anchor box 010 is installed, thereby preventing water vapor from entering the interior of the anchor box 010 through the gap between the anchor box 010 and the bridge 001; the left and right two side walls of the anchor box 010 are provided with through holes 011 for the pre-stressed cable 030 to pass through, and a protective pipe 020 is installed at the left through hole 011; the left end of the protective pipe 020 is sealed, the protective pipe 020 is sleeved on the left end of the pre-pre-stressed cable 030, and the protective pipe 020 is fixed on the anchor box 010 by bolts; a anchoring plate 040 is transversely installed in the anchor box 010, and the anchoring plate 040 is fastened on the bridge 001 by bolts; a support plate 050 is vertically welded on the anchoring plate 040, the support plate 050 is provided with a fixing hole for the pre-stressed cable 030 to pass through, and an anchor 060 for fixing the pre-stressed cable 030 is installed on the left side of the support plate 050; the end of the pre-stressed cable 030 passes through the right through hole 011 of the anchor box 010, the support plate 050 and the anchor 060 in sequence, and finally extends to the outside of the left through hole 011 of the anchor box 010; the pre-stressed cable 030 is anchored by the anchor 060, and the end of the pre-stressed cable 030 is protected by the protective pipe 020 fixed on the anchor box 010.

[0063] The in-box filling assembly is used to fill the interior space of the anchor box 010 and is detachable during maintenance, and includes an in-box expanding bladder 120; the in-box expanding bladder 120 is a rubber elastic bladder with built-in paraffin, and a soft injection channel pipe 121 is fixed on the in-box expanding bladder 120; the in-box expanding bladder 120 is arranged in the interior of the anchor box 010 during installation of the anchor box 010 (placed before fixation or plugged from the through hole 011 after fixation), and after the anchor box 010 is fixed, heated liquid paraffin is injected into the in-box expanding bladder 120 through the injection channel pipe 121 by a wax pumping assembly 140, so that the in-box expanding bladder 120 is expanded and most of the gas in the interior of the anchor box 010 is squeezed out, and at the same time the pre-stressed cable 030 in the anchor box 010 is wrapped; as shown in Figure 11 the wax pumping assembly 140 includes a wax bin, a pump body, a delivery pipe, an embedded head and a pressure sensor 141; the wax bin, the pump body and the delivery pipe are all provided with electric heating wires to ensure that the paraffin is in liquid state during pumping; the embedded head is fixed on the end of the delivery pipe and is a conical pipe which can cooperate with the injection channel pipe 121 to serve as a joint; the pressure sensor 141 is positioned on the delivery pipe and is signal connected with a display screen positioned on the pump body, and is used to monitor the pressure in the delivery pipe and further judge the filling condition of the interior space of the anchor box 010; when the filling of the interior space of the anchor box 010 is basically completed, the operation of the wax pumping assembly 140 is stopped and the injection channel pipe 121 is blocked.

[0064] The through-hole sealing assembly is used to seal the through-hole 011 and includes an annular soft bladder 110. The annular soft bladder 110 is an annular rubber soft bladder with an injection tube 111 fixed on it. The annular soft bladder 110 is sleeved on the prestressed cable 030. After the expansion bladder 120 is filled in the box, the operator uses the wax pumping assembly 140 to pump paraffin wax into the annular soft bladder 110 through the injection tube 111, thereby causing the annular soft bladder 110 to expand and press against the through-hole 011, thus sealing the through-hole 011. After pumping is completed, the injection tube 111 is sealed. The annular soft bladder 110 includes a paraffin bladder 112 and a covering bladder 113. The paraffin bladder 112 is an annular bladder, and the inside is filled with... The filling material is paraffin wax; the encapsulated sac 113 is an annular tubular sac that covers and encloses the paraffin sac 112. The encapsulated sac 113 is composed of a first sac and a second sac; both the first sac and the second sac are annular rubber sacs. The first sac is fitted onto the second sac, forming an annular tubular space between them. The first sac and the second sac are fixed together by stitching, which divides the annular tubular space into multiple square spaces (similar to the lining of a down jacket); these square spaces are filled with magnetic powder; because of the magnetic powder, the annular soft sac 110 will adhere to the inner wall of the through hole 011, thereby further improving the sealing effect.

[0065] Preferably, both the injection tube 111 and the injection channel tube 121 are plastic flexible tubes, which are sealed by knotting.

[0066] In actual use, after fixing the anchor box 010, the internal space of the anchor box 010 is first filled, and then the annular soft bladder 110 is controlled to expand and close the through hole 011.

[0067] Preferably, for ease of replacement, the annular soft capsule 110 is elongated before installation and bent into an annular shape during installation.

[0068] Preferably, in order to reduce the aging of the annular soft capsule 110, such as Figure 1 As shown, a threaded tube is fixed on the anchor box 010. The threaded tube is coaxial with the through hole 011 and fixed at a position close to the through hole 011. After the annular soft bladder 110 is installed, an annular cover plate is installed on the threaded tube to cover the annular soft bladder 110 and thus reduce its aging.

[0069] Preferably, in order to limit the flow of paraffin wax within the expanded bladder 120 after filling, such as... Figure 7 As shown, the expansion bladder 120 inside the box is a double-layer bladder, consisting of an outer bladder 122 and an inner bladder 123. The outer bladder 122 covers the inner bladder 123, and the inner bladder 123 is densely covered with fine pores. During the paraffin filling process, some paraffin will flow into the space between the outer bladder 122 and the inner bladder 123.

[0070] Preferably, as shown in Figure 8 The in-box expanding bag 120 is composed of a plurality of pie-shaped bags, which are the same size or different sizes, are connected in series and are in communication with each other.

[0071] The in-box expanding bag 120 is composed of a plurality of pie-shaped and / or spherical bags, which are adhered to the inner wall of the anchor box 010 according to the actual space shape in the anchor box 010 before the anchor box 010 is installed.

[0072] In order to reduce the probability of the in-box expanding bag 120 being scratched during expansion, as shown in Figure 1 When the anchor box 010 is installed, a scratch-proof cloth sheet 070 is first covered on the support plate 050 and the anchor 060, and the scratch-proof cloth sheet 070 is a sheet-shaped scratch-proof cloth.

[0073] Preferably, when the anchor box 010 is installed, one or more desiccant bags 080 are first put into the anchor box 010.

[0074] The technical solutions in the embodiments of the present application have at least the following technical effects or advantages:

[0075] The technical problem that the sealing effect of the bridge external prestressed anchoring device in the prior art completely depends on the sealing ring, and once the sealing ring is damaged or improperly installed, the sealing effect is easily lost, thereby causing the prestressed cable to be corroded and damaged is solved, and the technical effect that the sealing effect of the bridge external prestressed anchoring device is relatively good and the prestressed cable is not easily corroded and damaged is achieved.

[0076] Embodiment Two

[0077] In order to ensure the stability and reliability of the anchoring device and avoid the situation that the anchoring device is loose or fails, it is necessary to regularly maintain and maintain the bridge external prestressed anchoring device; in order to maintain in the above embodiment and the prior art, a part of the concrete structure may need to be removed during the maintenance process, which causes certain damage to the structure; in view of the above problems, the structure of the anchor box 010 and the in-box expanding bag 120 is optimized and improved in the embodiments of the present application, specifically:

[0078] As shown in Figure 9 and Figure 10 The anchor box 010 includes a fixed box body 012 and a top box 013, the fixed box body 012 is an open-top and open-bottom box structure, is fixed on the bridge 001, and the top box 013 is an open-bottom box structure, is detachably and fixedly connected to the fixed box body 012, and together with the fixed box body 012 forms a box body; the through hole 011 is located on the fixed box body 012; the number of the in-box expanding bag 120 is multiple, and is adhered to the fixed box body 012 and the top box 013 respectively. When maintenance is needed, the top box 013 can be removed and the in-box expanding bag 120 can be pried open for maintenance.

[0079] Preferably, an annular sealing plate is placed at the contact position between the top box 013 and the fixed box 012.

[0080] Preferably, in order to facilitate maintenance, a longitudinally arranged heat-conducting plate 015 is fixed inside the top box 013. The heat-conducting plate 015 divides the top box 013 into two parts, which can limit the deformation of the expansion bladder 120 inside the box and make it easier to open the expansion bladder 120 inside the box for maintenance.

[0081] To facilitate maintenance, before removing the top box 013, you can first cover it with something like... Figure 12 The heating blanket 150 shown is an electric heating blanket (including an electric heating layer + a heat insulation and reflective layer), preferably cross-shaped; the top box 013 is heated before the top box 013 is removed to facilitate the softening of the paraffin inside the anchor box 010, thereby facilitating the opening of the expansion bladder 120 inside the box; the heat-conducting plate 015 is made of metal and plays the role of conducting heat.

[0082] Before maintenance, the paraffin wax in the annular soft bladder 110 and the expanded bladder 120 inside the box can be extracted in whole or in part using the wax pump assembly 140.

[0083] Preferably, to further facilitate the extraction of paraffin wax from the annular soft bladder 110 and the inflatable bladder 120 by the wax pump assembly 140, an electric heating wire 130 is also provided inside the annular soft bladder 110 and the inflatable bladder 120. The electric heating wire 130 is a resistance wire, and a heat insulation sleeve is fitted on the electric heating wire 130 to prevent burns to the bladder body. The heat insulation sleeve is preferably a combination of multiple plastic tubes. The electric heating wire 130 extends from the injection tube 111 and the injection channel tube 121 and is electrically connected to the power supply. When the paraffin wax is extracted, the electric heating wire 130 operates to heat and liquefy the paraffin wax.

[0084] Example 3

[0085] Considering that although the annular soft capsule 110 in the above embodiment has magnetic powder adsorption of the inner wall of the through hole 011 within the capsule 113 to prevent air leakage, after long-term use, under high-temperature environments, the annular soft capsule 110 still has a certain risk of sagging due to the melting of the paraffin inside due to its own weight, resulting in a weak seal at the top position. To further reduce the risk of air leakage, this application embodiment improves the filling material inside the annular soft capsule 110 based on the above embodiment, thereby further restricting the flow of paraffin inside the annular soft capsule 110 and ensuring the stability of the seal at the top position of the annular soft capsule 110. Specifically:

[0086] The paraffin injected into the annular soft capsule 110 is uniformly doped with 0.5% to 3% fibers and 3% to 7% gas, with the fibers having a length of 1 to 2 cm. During pumping, the gas injected into the annular soft capsule 110 exists in the form of numerous small bubbles.Figure 13 and Figure 14 As shown in the figure; the fiber plays a role in reducing the fluidity of the paraffin wax; if the paraffin wax in the annular soft bag 110 melts, the bubbles doped in the paraffin wax will move upwards to the top position of the annular soft bag 110, ensuring that the annular soft bag 110 is continuously in an expanded state and thus ensuring the sealing effect.

[0087] In order to facilitate the mixing of bubbles and fibers in the paraffin wax, as shown in the figure, a mixing assembly is fixed on the conveying pipe; the mixing assembly comprises a bearing box 161, a rotating column 164, a gas pumping assembly 167 and a hopper 168; Figures 15 to 18

[0088] The bearing box 161 is a box structure, two side partitions 162 are fixed on the inner wall near the middle part, the side partitions 162 are hard strips, and the two side partitions 162 are symmetrically arranged; a strip-shaped closed bag 163 is fixed on the opposite surface of each side partition 162, the strip-shaped closed bag 163 is an elastic bag body in long strip shape, which is in communication with the gas pumping assembly 167 and expands and contracts under the control of the gas pumping assembly 167;

[0089] The rotating column 164 is a cylinder, which is rotatably connected to the inner wall of the bearing box 161 and rotates around its axis under the drive of a rotating drive assembly 166, which is preferably an electric motor; the axis of the rotating column 164 is the same as the length direction of the side partitions 162, and both ends of the rotating column 164 abut against the inner wall of the bearing box 161; the side wall of the rotating column 164 is densely covered with a plurality of protrusions or recesses, and a temperature adjusting assembly is positioned inside, which is preferably a combination of electric resistance wires and semiconductor refrigerating sheets;

[0090] When the strip-shaped closed bag 163 expands, it will abut against the side wall of the rotating column 164; at this time, the side partitions 162, the strip-shaped closed bag 163 and the rotating column 164 will divide the inside of the bearing box 161 into two sealed spaces; the wall of the space below is densely covered with electric resistance wires, and is also provided with a paraffin wax inlet and a paraffin wax outlet, and the bottom is provided with a gas inlet, and the paraffin wax outlet is provided with a detachable one-way valve; the wall of the space above is provided with a gas blowing inlet, a gas permeable opening and a fiber inlet; a swingable spray head is fixed on the gas blowing inlet;

[0091] The gas pumping assembly 167 is a combination of a gas pump and a gas valve, which is in communication with the gas inlet, the gas blowing inlet and the strip-shaped closed bag 163;

[0092] The hopper 168 is positioned at the top of the bearing box 161 and is provided with an internal material distribution and blocking mechanism, which is in communication with the fiber inlet and inputs a certain amount of fiber into the space above in time;

[0093] ​In actual use, the strip-shaped closed capsule 163 periodically expands and shrinks; the pump body also periodically pumps paraffin into the bearing box 161; and the pump body stops running when the strip-shaped closed capsule 163 shrinks.

[0094] During the filling of paraffin, the strip-shaped closed capsule 163 first shrinks, and then the rotating column 164 rotates 180 degrees, and a part of the liquid paraffin is adhered to the side wall of the rotating column 164 and is brought into the space above; then the strip-shaped closed capsule 163 expands, the rotating column 164 controls itself to cool, so that the paraffin brought into the space above solidifies; then the hopper 168 outputs the quantitative fiber, the gas blowing port pumps gas to blow away the fiber in the space above and then stops blowing; the rotating column 164 is heated to liquefy the paraffin adhered to the side wall; then the strip-shaped closed capsule 163 is controlled to shrink and the rotating column 164 is controlled to rotate 180 degrees, so that the paraffin with the fiber is mixed into the paraffin in the space below; then the above-mentioned actions are repeatedly performed until the filling is completed; during the period, the gas input port continuously injects gas into the paraffin in the space below.

[0095] Preferably, the delivery pipe is composed of two pipe bodies spliced together, and the pipe body away from the pump body can be detachably fixed on the pipe body close to the pump body; the volume of the pipe body away from the pump body is greater than the volume of the annular soft capsule 110; after the paraffin in the annular soft capsule 110 is pumped out by the pump wax assembly 140, the pipe body away from the pump body can be detached and the paraffin inside can be poured out, or the pump body can be directly controlled to pump out the paraffin pumped from the annular soft capsule 110 into the delivery pipe, so as to prevent the fiber from damaging the pump body.

[0096] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A bridge external prestressed anchorage device, comprising an anchor box, a protective pipe, prestressed cables, an anchor plate, a support plate, and anchorages, characterized in that: It also includes the in-box filling assembly and the through-hole sealing assembly; The bottom of the anchor box is equipped with an annular sealing ring at the contact point with the bridge; The box filling assembly includes an internal inflation bladder; The expansion bladder inside the box is a rubber elastic bladder with paraffin inside, and an injection channel pipe is fixed on it. It is placed inside the anchor box during anchor box installation. After the anchor box is fixed, heated liquid paraffin is injected into the expansion bladder inside the box through the wax pump assembly. Then the expansion bladder inside the box is expanded and most of the gas in the internal space of the anchor box is squeezed out, while the prestressed cable inside the box is wrapped. The through-hole sealing assembly is used to seal the through-hole and includes an annular soft bladder, which is an annular rubber soft bladder with an injection tube fixed on it. The annular soft bladder is sleeved on the prestressed cable. After the bladder is filled in the box, the operator uses the wax pump assembly to pump paraffin wax into the annular soft bladder through the injection tube, which causes the annular soft bladder to expand and press against the through-hole, thereby sealing the through-hole. After pumping is completed, the injection tube is sealed.

2. The bridge external prestressed anchorage device as described in claim 1, characterized in that: The annular soft capsule includes a paraffin capsule and a covered capsule. The paraffin capsule is an annular capsule and is filled with paraffin. The encapsulated capsule is an annular tubular capsule that covers and encapsulates the paraffin capsule. The encapsulated capsule consists of a first capsule and a second capsule. Both the first and second capsules are annular rubber capsules. The first capsule is fitted onto the second capsule, forming an annular tubular space between them. The first and second capsules are fixed together by stitching, which divides the annular tubular space into multiple square spaces. These grid-like spaces are filled with magnetic powder; because of the magnetic powder, the annular soft capsules adhere to the inner walls of the through holes.

3. The bridge external prestressed anchorage device as described in claim 1, characterized in that: The annular soft capsule is elongated before installation and is bent into an annular shape during installation.

4. The bridge external prestressed anchorage device as described in claim 1, characterized in that: A threaded tube is fixed on the anchor box. The threaded tube is coaxial with the through hole and fixed near the through hole. After the annular soft bladder is installed, an annular cover plate is installed on the threaded tube to cover the annular soft bladder and reduce its aging.

5. The bridge external prestressed anchorage device as described in claim 1, characterized in that: When installing the anchor box, first cover the support plate and anchor with a piece of anti-scratch cloth, which is a sheet of anti-scratch cloth.

6. The bridge external prestressed anchorage device as described in claim 1, characterized in that: The anchor box includes a fixed box and a top box. The fixed box is a box structure with openings at both the top and bottom, and is fixed to the bridge. The top box is a box structure with an opening at the bottom, and is detachably and fixedly connected to the fixed box, forming a box together with the fixed box. The through hole is located on the fixed box. There are multiple expansion bladders inside the box, which are respectively attached to the fixed box and the top box. When maintenance is required, the top box can be removed and the expansion bladders inside can be opened for maintenance.

7. The bridge external prestressed anchorage device as described in claim 6, characterized in that: A longitudinally arranged heat-conducting plate is fixed on the top box, which divides the top box into two parts, thereby limiting the deformation of the expansion bladder inside the box and making it easier to open the expansion bladder inside the box for inspection and maintenance. Before removing the top box, first cover the top box with a heating blanket, which is an electric heating blanket; Before removing the top box, the top box is heated to soften the paraffin inside the anchor box, making it easier to open the expansion bladder inside the box; the heat-conducting plate is made of metal and serves to conduct heat.

8. The bridge external prestressed anchorage device as described in any one of claims 1 to 7, characterized in that: The paraffin wax pumped into the annular soft capsule contains 0.5% to 3% fiber and 3% to 7% gas, with the fiber length being 1 to 2 cm. During pumping, the gas inside the annular soft capsule exists in the form of a large number of small bubbles. The fibers reduce the fluidity of the paraffin wax. If the paraffin wax inside the annular soft capsule melts, the bubbles mixed in with the paraffin wax will move upwards to the top of the annular soft capsule, ensuring that the annular soft capsule remains in an inflated state and thus ensuring a sealing effect.

9. The bridge external prestressed anchorage device as described in claim 8, characterized in that: The wax pump assembly includes a wax tank, a pump body, a delivery pipe, an insert head, and a pressure sensor; The wax chamber, pump body, and delivery pipe are all equipped with electric heating wires to ensure that the paraffin wax remains in a liquid state during pumping. The embedded head is fixed to the end of the delivery pipe and is a tapered tube that can cooperate with the injection channel pipe to act as a connector. The pressure sensor is positioned on the delivery pipe and is connected to the display screen positioned on the pump body to monitor the pressure in the delivery pipe and thus determine the filling status of the internal space of the anchor box. Once the internal space of the anchor box is basically filled, stop the operation of the wax pump assembly and seal the injection channel pipe.

10. The bridge external prestressed anchorage device as described in claim 9, characterized in that: A mixing component is fixed on the conveying pipe; the mixing component includes a bearing box, a rotating column, a pumping assembly, and a hopper. The load-bearing box is a box structure with two side partitions fixed near the middle of its inner wall. The side partitions are rigid strips and the two side partitions are symmetrically arranged. On the opposite surfaces of the two side partitions, there are strip-shaped closed bladders. The strip-shaped closed bladders are long and elastic bladders that are connected to the air pumping assembly and expand and contract under the control of the air pumping assembly. The rotating column is a cylinder that is rotatably connected to the inner wall of the bearing box. Under the drive of the rotation drive assembly, it rotates around its own axis. The axial direction of the rotating column is the same as the length direction of the side partition and both ends abut against the inner wall of the bearing box. The side wall of the rotating column is covered with multiple protrusions or pits, and a temperature regulating component is positioned inside. When the strip-shaped sealing bladder expands, it will abut against the side wall of the rotating column; at this time, the side septum, the strip-shaped sealing bladder, and the rotating column will divide the interior of the bearing box into two sealed spaces, upper and lower; the wall of the lower space is densely covered with resistance wires, and is also provided with a paraffin wax inlet and a paraffin wax outlet, and its bottom is provided with a gas inlet, and the paraffin wax outlet is provided with a detachable one-way valve; the wall of the upper space is provided with a gas blowing inlet, a vent, and a fiber inlet; a nozzle is fixed on the gas blowing inlet; The pump assembly is a combination of a pump and a valve, and is connected to a gas inlet, a gas blowing inlet, and a strip-shaped sealed bag. The hopper is positioned at the top of the supporting box and has a built-in material distribution and blocking mechanism that is connected to the fiber inlet, allowing a fixed amount of fiber to be fed into the space above as needed.

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