A road preventive maintenance crack pouring device

Abstract

The utility model relates to a gap filling device technical field, especially a gap filling device for highway preventive maintenance, including the discharge pipe, the outer surface fixed connection of discharge pipe has two symmetrical setting arc electric heating sheet. The utility model's advantage lies in: pulling two arc shells down, makes arc clamping plate separate from locking ring, can separate arc shell with discharge pipe, can tear off aging arc thermal insulation pad and replace new one at this moment. When installing, the new arc thermal insulation pad is bonded in the arc shell inner wall through the glue, the arc electric heating sheet is inserted into the embedded groove, the arc clamping plate is inserted in the locking ring bottom, reversely rotates the internal thread sleeve and pushes the compression ring to adhere to the arc shell bottom end, and the positioning pin is inserted into the positioning hole to complete the fixation. The whole replacement process does not need to disassemble the discharge pipe or arc electric heating sheet, and the steps are simple and convenient to operate, can quickly complete the thermal insulation pad replacement, avoids the influence operation because of the thermal insulation pad failure, guarantees the gap filling efficiency and safety.

Description

Technical Field

[0001] This utility model relates to the field of crack sealant technology, and in particular to a crack sealant for highway prevention and maintenance. Background Technology

[0002] The crack sealing nozzle for highway crack prevention and maintenance can be defined as: a core component used in conjunction with a crack sealing device for the prevention and maintenance of highway cracks. Its core function is to precisely and evenly inject heated and molten sealing material (such as asphalt or crack sealant) into cracks on the highway surface, sealing the cracks and preventing external media such as rainwater and snow from penetrating the highway base layer, thus extending the service life of the highway. Specifically, the nozzle mainly consists of a discharge pipe, a heating element, a heat insulation layer, a handle, and a connection interface. The connection interface connects to the material tank and power system of the crack sealing device. The heating element maintains the molten state of the sealing material, preventing it from solidifying and clogging during transport. The heat insulation layer wraps around the discharge pipe and heating element, reducing heat loss and preventing burns to operators. The handle allows operators to adjust the nozzle angle and position, ensuring precise injection of the sealing material into the cracks.

[0003] The core defects of existing crack sealing nozzles used for highway maintenance lie in the insufficient durability and ease of replacement of the thermal insulation layer, affecting the efficiency and safety of crack sealing operations. Currently, most crack sealing nozzles in the industry use adhesive or integral molding methods to fix the thermal insulation layer to the outside of the discharge pipe and heating component. This thermal insulation layer is constantly exposed to high temperatures and outdoor environments, and frequently comes into contact with road dust, gravel, and other impurities, making it prone to aging, cracking, and detachment, leading to a decrease in thermal insulation effectiveness. Once the thermal insulation layer fails, not only will the sealing material lose heat rapidly, causing it to solidify and block the discharge pipe, affecting the continuity of crack sealing operations, but the temperature of the nozzle shell will also rise, increasing the risk of burns to construction workers. Utility Model Content

[0004] The purpose of this invention is to at least solve one of the aforementioned technical defects.

[0005] Therefore, one objective of this utility model is to provide a crack sealant for highway prevention and maintenance, so as to solve the problems mentioned in the background art and overcome the shortcomings of the existing technology.

[0006] To achieve the above objectives, one embodiment of this utility model provides a crack sealer for highway prevention and maintenance, comprising a discharge pipe, two symmetrically arranged arc-shaped electric heating elements fixedly connected to the outer surface of the discharge pipe, a locking ring fixedly connected between the top ends of the two arc-shaped electric heating elements and the outer surface of the discharge pipe, two symmetrically arranged arc-shaped outer shells sleeved on the outer surface of the discharge pipe, an arc-shaped retaining plate fixedly connected to the top end of each arc-shaped outer shell, both arc-shaped retaining plates being inserted into the bottom of the locking ring, an arc-shaped heat insulation pad glued to the inner wall of each arc-shaped outer shell, the inner wall of the arc-shaped heat insulation pad being in contact with the outer surface of the discharge pipe, an internal threaded sleeve threadedly connected to the outer surface of the discharge pipe, a pressure ring rotatably connected to the outer surface of the internal threaded sleeve via a bearing, the top surface of the pressure ring being in contact with the bottom ends of the two arc-shaped outer shells, a plurality of symmetrically arranged positioning pins fixedly connected to the top of the pressure ring, the plurality of positioning pins being respectively inserted into the bottom ends of the two arc-shaped outer shells.

[0007] Preferably, in any of the above solutions, each of the arc-shaped outer shells has two symmetrically arranged positioning holes at its bottom, and several positioning pins are respectively inserted into the several positioning holes.

[0008] Preferably, in any of the above embodiments, each of the arc-shaped heat insulation pads has an embedding groove on its inner wall, and the two arc-shaped electric heating elements are respectively inserted into the two embedding grooves.

[0009] Preferably, in any of the above embodiments, a blocking ring is fixedly connected to the outer surface of the discharge pipe, the blocking ring is located below the internal threaded sleeve, and the blocking ring is parallel to the locking ring.

[0010] Preferably, the material of the arc-shaped outer shell is stainless steel, and the material of the arc-shaped heat insulation pad is silicone rubber.

[0011] Preferably, of any of the above embodiments, a control valve is fixedly connected to the top end of the discharge pipe, and a connecting hose is fixedly connected to the end of the control valve away from the discharge pipe.

[0012] Preferably, in any of the above embodiments, an arc-shaped protective cover is fixedly connected to the outer surface of each arc-shaped shell, the inner walls of both arc-shaped protective covers are in contact with the outer surface of the locking ring, and the control valve is located between the two arc-shaped protective covers.

[0013] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows: 1. When the arc-shaped heat insulation pad needs replacement due to aging, first rotate the inner threaded sleeve to move it downwards along the outer surface of the discharge pipe, causing the pressure ring to move away from the bottom of the arc-shaped outer shell. The positioning pin will then disengage from the positioning hole at the bottom of the arc-shaped outer shell. Next, pull the two arc-shaped outer shells downwards to disengage the arc-shaped retaining plate from the locking ring, thus separating the arc-shaped outer shell from the discharge pipe. At this point, the aged arc-shaped heat insulation pad can be easily peeled off and replaced with a new one. During installation, glue the new arc-shaped heat insulation pad to the inner wall of the arc-shaped outer shell, insert the arc-shaped electric heating element into the corresponding groove, and then insert the arc-shaped retaining plate into the bottom of the locking ring. Rotate the inner threaded sleeve in the opposite direction to push the pressure ring upwards to fit against the bottom of the arc-shaped outer shell, and insert the positioning pin into the positioning hole to complete the fixation. The entire replacement process does not require disassembling the discharge pipe or the arc-shaped electric heating element. The steps are simple and convenient, allowing for quick heat insulation pad replacement and preventing work disruptions due to heat insulation pad failure, thus ensuring grouting efficiency and safety.

[0014] 2. After assembly, the arc-shaped outer shell is positioned by an arc-shaped clamping plate and locking ring, and fixed by a pressure ring and positioning pin. This multi-layered structure ensures that the arc-shaped outer shell fits tightly against the discharge pipe, preventing displacement during operation. The arc-shaped heat insulation pad is made of silicone rubber, with its inner wall tightly fitting against the discharge pipe. An embedded groove encloses the arc-shaped electric heating element, reducing heat loss and preventing high-temperature conduction to the arc-shaped outer shell, thus preventing burns to construction personnel. The stainless steel arc-shaped outer shell, combined with an arc-shaped protective cover, protects the arc-shaped electric heating element and arc-shaped heat insulation pad from wear and tear by road surface gravel and dust, extending the service life of the components. The control valve allows for precise adjustment of the sealing material discharge rate, and the connecting hose facilitates adjustment of the working angle. The overall structure, through a stable fixing design and efficient thermal insulation configuration, ensures that the sealing material maintains good fluidity during transportation, preventing solidification and blockage, ensuring full filling and strong adhesion, and improving the quality of sealing and operational safety. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of the assembly of this utility model; Figure 2 This is a cross-sectional structural diagram of the assembly of this utility model; Figure 3 This is an exploded structural diagram of the assembly of this utility model; Figure 4 This is a schematic diagram of the structure of the discharge pipe of this utility model; Figure 5 This is a schematic diagram of the structure of the arc-shaped heat insulation pad of this utility model.

[0016] In the diagram: 1-Discharge pipe, 2-Arc-shaped electric heating element, 3-Locking ring, 4-Arc-shaped outer shell, 5-Arc-shaped clamping plate, 6-Arc-shaped heat insulation pad, 7-Internal threaded sleeve, 8-Pressure ring, 9-Positioning pin, 10-Positioning hole, 11-Embedded groove, 12-Blocking ring, 13-Control valve, 14-Connecting hose, 15-Arc-shaped protective cover. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings, but the scope of protection of the present invention is not limited thereto.

[0018] like Figures 1 to 5 As shown, a crack sealant for highway maintenance includes a discharge pipe 1. Two symmetrically arranged arc-shaped electric heating elements 2 are fixedly connected to the outer surface of the discharge pipe 1. A locking ring 3 is fixedly connected between the top of the two arc-shaped electric heating elements 2 and the outer surface of the discharge pipe 1. Two symmetrically arranged arc-shaped outer shells 4 are fitted onto the outer surface of the discharge pipe 1. An arc-shaped retaining plate 5 is fixedly connected to the top of each arc-shaped outer shell 4. Both arc-shaped retaining plates 5 are inserted into the bottom of the locking ring 3. An arc-shaped heat insulation pad 6 is glued to the inner wall of each arc-shaped outer shell 4. The inner wall of the arc-shaped heat insulation pad 6 is in contact with the outer surface of the discharge pipe 1. An internal threaded sleeve 7 is threadedly connected to the outer surface of the discharge pipe 1. A pressure ring 8 is rotatably connected to the outer surface of the internal threaded sleeve 7 through a bearing. The top surface of the pressure ring 8 is in contact with the bottom end of the two arc-shaped outer shells 4. Several symmetrically arranged positioning pins 9 are fixedly connected to the top of the pressure ring 8. The several positioning pins 9 are respectively inserted into the bottom end of the two arc-shaped outer shells 4.

[0019] As an optional technical solution of this utility model, each arc-shaped outer shell 4 has two symmetrically arranged positioning holes 10 at its bottom, and several positioning pins 9 are respectively inserted into several positioning holes 10. The positioning holes 10 at the bottom of the arc-shaped outer shell 4 are engaged with the positioning pins 9 of the pressure ring 8, which can accurately position the relative position of the arc-shaped outer shell 4 and the pressure ring 8, avoid the pressure ring 8 from loosening and causing the arc-shaped outer shell 4 to shift, and enhance the stability of the structure.

[0020] As an optional technical solution of this utility model, each arc-shaped heat insulation pad 6 has an embedded groove 11 on its inner wall. Two arc-shaped electric heating elements 2 are respectively inserted into the two embedded grooves 11. The embedded groove 11 of the arc-shaped heat insulation pad 6 provides a limiting space for the arc-shaped electric heating elements 2, so that the heating elements are tightly attached to the heat insulation pad, reducing heat loss, and preventing the heating elements from shifting, thus ensuring heating uniformity and heat insulation effect.

[0021] As an optional technical solution of this utility model, a blocking ring 12 is fixedly connected to the outer surface of the discharge pipe 1. The blocking ring 12 is located below the internal threaded sleeve 7. The blocking ring 12 is parallel to the locking ring 3. The blocking ring 12 of the discharge pipe 1 can limit the downward stroke of the internal threaded sleeve 7, avoid excessive adjustment when rotating the internal threaded sleeve 7, and prevent damage to the components. At the same time, it provides a bottom support reference for the pressure ring 8, improving the ease of operation.

[0022] As an optional technical solution of this utility model, the arc-shaped outer shell 4 is made of stainless steel, and the arc-shaped heat insulation pad 6 is made of silicone rubber. The stainless steel arc-shaped outer shell 4 has high strength and wear resistance, and is suitable for complex outdoor working environments; the silicone rubber arc-shaped heat insulation pad 6 is resistant to high temperature, has good flexibility, strong adhesion, and can effectively block heat, taking into account both durability and heat insulation effect.

[0023] A control valve 13 is fixedly connected to the top end of the discharge pipe 1. A connecting hose 14 is fixedly connected to the end of the control valve 13 away from the discharge pipe 1. The control valve 13 can flexibly adjust the discharge speed and amount of sealing material to avoid material waste. The connecting hose 14 facilitates the adjustment of the working angle of the discharge pipe 1 to adapt to cracks of different positions and shapes, thereby improving operational flexibility.

[0024] As an optional technical solution of this utility model, an arc-shaped protective cover 15 is fixedly connected to the outer surface of each arc-shaped shell 4, and the inner walls of the two arc-shaped protective covers 15 are in contact with the outer surface of the locking ring 3. The control valve 13 is located between the two arc-shaped protective covers 15.

[0025] A crack sealant for highway preventive maintenance works on the following principle: 1): When the arc-shaped heat insulation pad 6 is aged and needs to be replaced, first rotate the inner threaded sleeve 7 to move it downward along the outer surface of the discharge pipe 1, which will drive the pressure ring 8 away from the bottom of the arc-shaped outer shell 4, and the positioning pin 9 will disengage from the positioning hole 10 at the bottom of the arc-shaped outer shell 4.

[0026] 2): Pull the two arc-shaped outer shells 4 downwards to disengage the arc-shaped clamping plate 5 from the locking ring 3, and the arc-shaped outer shell 4 can be separated from the discharge pipe 1. At this time, the old arc-shaped heat insulation pad 6 can be easily torn off and replaced with a new one.

[0027] 3): During installation, the new arc-shaped heat insulation pad 6 is glued to the inner wall of the arc-shaped outer shell 4, so that the arc-shaped electric heating element 2 is inserted into the corresponding embedded groove 11. Then, the arc-shaped clamping plate 5 is inserted into the bottom of the locking ring 3. The internal threaded sleeve 7 is rotated in the opposite direction to push the pressure ring 8 upward to fit the bottom end of the arc-shaped outer shell 4. The positioning pin 9 is inserted into the positioning hole 10 to complete the fixation.

[0028] In summary, when the arc-shaped heat insulation pad 6 needs to be replaced due to aging, the internal threaded sleeve 7 is first rotated to move it downwards along the outer surface of the discharge pipe 1, causing the pressure ring 8 to move away from the bottom of the arc-shaped outer shell 4, and the positioning pin 9 to disengage from the positioning hole 10 at the bottom of the arc-shaped outer shell 4. Then, the two arc-shaped outer shells 4 are pulled downwards directly to disengage the arc-shaped clamping plate 5 from the locking ring 3, thus separating the arc-shaped outer shell 4 from the discharge pipe 1. At this point, the aged arc-shaped heat insulation pad 6 can be easily peeled off and replaced with a new one. During installation, the new arc-shaped heat insulation pad 6 is glued to the inner wall of the arc-shaped outer shell 4, and the arc-shaped electric heating element 2 is inserted into the corresponding embedding groove 11. Then, the arc-shaped clamping plate 5 is inserted into the bottom of the locking ring 3, and the internal threaded sleeve 7 is rotated in the opposite direction to push the pressure ring 8 upwards to fit against the bottom of the arc-shaped outer shell 4. The positioning pin 9 is then inserted into the positioning hole 10 to complete the fixation. The entire replacement process requires no disassembly of the discharge pipe 1 or the arc-shaped electric heating element 2. The steps are simple and convenient, allowing for quick replacement of the heat insulation pad and preventing operational disruptions due to pad failure, thus ensuring both grouting efficiency and safety. After assembly, the arc-shaped outer shell 4 is positioned by the arc-shaped clamping plate 5 and locking ring 3, and fixed by the pressure ring 8 and positioning pin 9. This multi-layered structure ensures that the arc-shaped outer shell 4 fits tightly against the discharge pipe 1, preventing displacement during operation. The arc-shaped heat insulation pad 6 is made of silicone rubber, with its inner wall tightly fitting against the discharge pipe 1. The embedded groove 11 encloses the arc-shaped electric heating element 2, reducing heat loss and preventing high-temperature conduction to the arc-shaped outer shell 4, thus preventing burns to construction personnel. The stainless steel arc-shaped outer shell 4, paired with the arc-shaped protective cover 15, protects the arc-shaped electric heating element 2 and the arc-shaped heat insulation pad 6 from wear and tear by road surface gravel and dust, extending the service life of the components. The control valve 13 allows for precise adjustment of the sealing material discharge, and the connecting hose 14 facilitates adjustment of the working angle. The overall structure, through a stable fixed design and efficient thermal insulation configuration, ensures that the sealing material maintains good fluidity during transportation, avoids solidification and blockage, guarantees full filling and firm adhesion, and improves the quality of sealing and operational safety.

Claims

1. A crack sealant for highway prevention and maintenance, characterized in that: The device includes a discharge pipe (1), on the outer surface of which two symmetrically arranged arc-shaped electric heating elements (2) are fixedly connected. A locking ring (3) is fixedly connected between the top of the two arc-shaped electric heating elements (2) and the outer surface of the discharge pipe (1). Two symmetrically arranged arc-shaped outer shells (4) are fitted onto the outer surface of the discharge pipe (1). An arc-shaped clamping plate (5) is fixedly connected to the top of each arc-shaped outer shell (4). Both arc-shaped clamping plates (5) are inserted into the bottom of the locking ring (3). The inner wall of each arc-shaped outer shell (4) is open to the air. An arc-shaped heat insulation pad (6) is glued on. The inner wall of the arc-shaped heat insulation pad (6) is in contact with the outer surface of the discharge pipe (1). The outer surface of the discharge pipe (1) is threaded with an inner thread sleeve (7). The outer surface of the inner thread sleeve (7) is rotatably connected to a pressure ring (8) through a bearing. The top surface of the pressure ring (8) is in contact with the bottom end of the two arc-shaped shells (4). The top of the pressure ring (8) is fixedly connected with several symmetrically arranged positioning pins (9). The several positioning pins (9) are respectively inserted into the bottom end of the two arc-shaped shells (4).

2. The crack sealant for highway prevention and maintenance according to claim 1, characterized in that: Each of the arc-shaped outer shells (4) has two symmetrically arranged positioning holes (10) at its bottom, and several positioning pins (9) are respectively inserted into the several positioning holes (10).

3. A crack sealant for highway prevention and maintenance according to claim 2, characterized in that: Each of the arc-shaped heat insulation pads (6) has an embedded groove (11) on its inner wall, and the two arc-shaped electric heating elements (2) are respectively inserted into the two embedded grooves (11).

4. A crack sealant for highway prevention and maintenance according to claim 3, characterized in that: A blocking ring (12) is fixedly connected to the outer surface of the discharge pipe (1). The blocking ring (12) is located below the inner threaded sleeve (7) and is parallel to the locking ring (3).

5. A crack sealant for highway prevention and maintenance according to claim 4, characterized in that: The arc-shaped outer shell (4) is made of stainless steel, and the arc-shaped heat insulation pad (6) is made of silicone rubber.

6. A crack sealant for highway prevention and maintenance according to claim 5, characterized in that: A control valve (13) is fixedly connected to the top end of the discharge pipe (1), and a connecting hose (14) is fixedly connected to the end of the control valve (13) away from the discharge pipe (1).

7. A crack sealant for highway prevention and maintenance according to claim 6, characterized in that: Each of the arc-shaped outer shells (4) has an arc-shaped protective cover (15) fixedly connected to its outer surface. The inner walls of the two arc-shaped protective covers (15) are in contact with the outer surface of the locking ring (3). The control valve (13) is located between the two arc-shaped protective covers (15).

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