Expressway maintenance device

Abstract

The invention relates to a highway maintenance device, and belongs to the technical field of highway maintenance, the highway maintenance device comprises a crushing assembly, the crushing assembly comprises a main body, a salt box and a crushing roller, the salt box is connected with a bearing device, the two ends of the bearing device are connected with the two axial ends of the crushing roller respectively, and the middle of the bearing device is connected with the salt box; the bearing device enables the salt box to be suspended at the front end of the crushing roller; an opening is formed in the lower portion of the salt box, a baffle is hinged to the opening, a spring is arranged at the position of a hinge shaft where the baffle is connected with the opening, and the spring enables the baffle to be kept in the state of blocking the opening; through the arrangement of the bearing device and the baffle structure driven by the spring, the deicing effect is ensured while the salt spreading amount is controllable.

Description

Technical Field

[0001] The invention belongs to the technical field of highway maintenance, and in particular relates to a highway maintenance device. Background Art

[0002] Highways are usually paved with concrete or asphalt. During use, due to the influence of weather, the highway road surface will be covered with rain and snow. Long-term snow accumulation will have an impact on the road surface. For example, ice on the road surface under long-term snow accumulation can cause traffic accidents. At the same time, long-term ice will cause erosion. For this reason, maintenance equipment is needed to remove the snow.

[0003] A general maintenance device, such as a highway pavement maintenance device and a maintenance method thereof disclosed in Chinese patent CN112681209B, includes an ice crushing module and a rolling module, wherein the ice crushing module includes a salt box, both sides of the salt box are fixedly connected to a transmission box, one side of the top surface of the salt box is fixedly connected to a power mechanism, the transmission box is located on one side of the power mechanism and is fixedly connected to a connecting plate, and the opposite surfaces of the two transmission boxes are provided with a connecting rod 1 and a connecting rod 2 that contact the arc-shaped side surface of the bottom of the salt box. In the present invention, a gear track is slidably connected to the inner side of the transmission box, and the power mechanism can drive the transmission rod to rotate, so that the half gear rotates. The rotation of the half gear can make the gear track perform reciprocating linear motion, so that the gear one and the gear two rotate reciprocatingly, so that the ice-breaking rods on the connecting rod one and the connecting rod two can knock the ice layer on the bottom surface back and forth in turn, and the ice-breaking speed is faster. At the same time, salt can enter the leakage groove two from the leakage groove one or the leakage groove three. When the ice-breaking rod knocks the ice layer back and forth, the salt in the leakage groove two can be shaken out from the open groove, so that salt can be spread on the road surface when breaking ice, which has a good ice-breaking effect and is easy to use.

[0004] In different situations, the amount of salt needed is different. For example, when there is a lot of snow in a certain place, or the ice layer is thick, more salt needs to be spread to assist snow accumulation and improve snow removal and maintenance efficiency. When there is less snow and more salt is not needed, too much salt will flow into the soil or farmland with the accumulated water, promoting land salinization. Therefore, the amount of salt needs to be reduced at this time. However, in the above process, the amount of salt is not adjusted according to the thickness of the ice layer. For this reason, a highway maintenance device with controllable salt spreading amount and good de-icing effect is needed. Summary of the invention

[0005] In order to solve the above problems existing in the prior art, the present invention provides a highway maintenance device, which has the characteristics of controllable salt spreading amount and good deicing effect.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] A highway maintenance device, comprising a crushing assembly, the crushing assembly comprising a main body, a salt box and a crushing roller, the salt box being connected to a support, the two ends of the support being respectively connected to the two ends of the crushing roller axis, the middle of the support being connected to the salt box, the support allowing the salt box to be suspended at the front end of the crushing roller;

[0008] An opening is arranged below the salt box, a baffle is hingedly arranged on the opening, a spring is arranged at the hinge shaft connecting the baffle and the opening, and the spring enables the baffle to maintain a state of blocking the opening.

[0009] As a preferred technical solution of the present invention, the salt box is a hollow quadrangular prism, the opening of the quadrangular prism salt box is arranged obliquely downward, the hinge axis is arranged at the lower edge of the opening, and both hinge axes are provided with springs, which maintain the baffle in a state of abutting against the upper edge of the opening.

[0010] As a preferred technical solution of the present invention, it also includes a heating module, and the heating module includes a plurality of heating rods, and the plurality of heating rods are arranged on the crushing roller.

[0011] As a preferred technical solution of the present invention, the heating module further includes an auxiliary heater, and the auxiliary heater is arranged at the opening of the salt box.

[0012] As a preferred technical solution of the present invention, it also includes a control module, which is electrically connected to a plurality of heating rods and an auxiliary heater. The control module is electrically connected to a pressure sensor, which is arranged at the opening and is used to upload the pressure of the inner wall of the opening to the control module. The control module determines whether the pressure exceeds a threshold value, and increases the power of the auxiliary heater when the threshold value is exceeded.

[0013] As a preferred technical solution of the present invention, the pressure sensor is arranged at the opening and is used to upload the pressure y of the inner wall of the opening to the control module. The control module instructs the power of the auxiliary heater to be adjusted to p, where p = y / y0×p0, y0 and p0 are pre-input constants.

[0014] As a preferred technical solution of the present invention, the control module adjusts the power of the heating rod to pj, wherein pj=p0 / p×pj0, wherein pj0 is the pre-input standard power of the heating rod.

[0015] As a preferred technical solution of the present invention, a rolling roller is arranged behind the crushing roller along the forward direction.

[0016] As a preferred technical solution of the present invention, a stirring rod is arranged in the salt box, and the stirring rod is transmission-connected to the crushing roller.

[0017] The beneficial effects of the present invention are:

[0018] (1) By arranging a support at both ends of the crushing roller, arranging a salt box on the support, and making the baffle of the opening of the salt box set downwardly maintained in a state of blocking the opening by a spring, the opening of the salt box can be opened and closed periodically, and the opening amplitude of the baffle is related to the vibration amplitude. When the ice layer is thicker, the greater the force on the crushing roller, the greater the vibration of the salt box, the greater the upward trend of the salt box during the up and down bumping cycle, the stronger the rotational inertia given to the baffle, the greater the amplitude of the baffle opening, and the more salt is spread. When the ice layer is thinner, the opening amplitude of the baffle is smaller, so that the amount of salt spread can be controlled;

[0019] (2) The crushing roller is heated by setting a heating rod, thereby improving the ice breaking efficiency and de-icing effect;

[0020] (3) An auxiliary heater is arranged at the opening, and a control module is enabled to determine whether the pressure on the inner wall of the opening exceeds a threshold value, and the power of the auxiliary heater is increased when the pressure on the inner wall of the opening exceeds the threshold value. When the pressure on the inner wall of the opening exceeds the threshold value and there is a high probability that salt agglomerates will accumulate at the opening, the power of the auxiliary heater is increased to alleviate the agglomeration of the salt pile and ensure the salt spreading efficiency. When the pressure on the inner wall of the opening is lower than the threshold value and the probability of agglomeration is low, the power of the auxiliary heater is reduced to save energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 It is a schematic cross-sectional structure diagram of the salt box of the present invention when it is in an open state;

[0024] Figure 3 The schematic diagram of the top view of the crushing roller and the salt box of the present invention is

[0025] Figure 4 This is a control loop block diagram of the present invention;

[0026] Description of main component symbols:

[0027] In the figure: 1, frame; 21, crushing roller; 22, rotating shaft; 3, salt box; 31, opening; 32, baffle; 33, stirring rod; 34, support; 4, rolling roller. DETAILED DESCRIPTION

[0028] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0029] See also Figure 1-4, a highway maintenance device, comprising a crushing assembly, the crushing assembly comprising a main body, a salt box 3 and a crushing roller 21;

[0030] Specifically, the main body is a vehicle device that drives the maintenance device forward. The crushing component includes a frame 1. The frame 1 is a hollow quadrangular prism. Two faces of the hollow quadrangular prism are parallel to the ground and are arranged on the highway maintenance device. One of the axis lines is parallel to the axis line of the highway maintenance device. The bottom surface of the hollow quadrangular prism frame 1 is hollowed out. At this time, the frame 1 is similar to an inverted box, and its four side faces are perpendicular to the ground. Through holes are arranged on two symmetrical side faces of the hollow quadrangular prism to ensure that the two through holes are symmetrical along the axis line of the highway maintenance device. A rotating shaft 22 is passed through the two through holes, and a crushing roller 21 is coaxially arranged on the rotating shaft 22. At this time, the axial direction of the crushing roller 21 is perpendicular to the forward direction or axial direction of the highway maintenance device, and can rotate along the rotating shaft 22.

[0031] When the highway maintenance device drives the crushing roller 21 forward, the crushing roller 21 contacts the ice surface, and the ice surface gives the crushing roller 21 a force that is opposite to the forward direction of the highway maintenance device and tangential to the crushing roller 21, driving the crushing roller 21 to rotate. The blade on the crushing roller 21 applies a downward force to crush the ice surface. During the crushing process, the ice surface gives the crushing roller 21 and the rotating shaft 22 an upward reaction force, and the rotating shaft 22 abuts against the inner wall of the through hole. The through hole allows the rotating shaft 22 and the crushing roller 21 to remain in place, and then the crushing roller 21 continues to crush the ice surface to complete the highway maintenance.

[0032] In the above process, salt sprinkling is required to assist, that is, salt is sprinkled into the ice layer to lower the melting point of ice and snow, reduce the amount of solid ice and snow, and facilitate the crushing roller 21 to crush the ice. For this purpose, it also includes a salt box 3, and the salt box 3 is connected to a support 34. The two ends of the support 34 are respectively connected to the two axial ends of the crushing roller 21, and the middle part of the support 34 is connected to the salt box 3. The support 34 allows the salt box 3 to be suspended at the front end of the crushing roller 21. An opening 31 is provided below the salt box 3, and a baffle 32 is hingedly provided at the opening 31. A spring is provided at the hinge shaft connecting the baffle 32 and the opening 31, and the spring maintains the baffle 32 in a state of blocking the opening 31;

[0033] Specifically, the support 34 is an "X"-shaped rod, the length of the two short rods of the "X"-shaped rod is greater than the radius of the crushing roller 21, the length of the long rod of the "X"-shaped rod is between the axial length of the crushing roller 21 and the distance between the two surfaces of the frame 1 provided with pain, and there is a gap between the two ends of the crushing roller 21 and the side wall of the frame 1, and the two ends of the "X"-shaped rod are arranged in the gap between the two ends of the crushing roller 21 and the side wall of the frame 1. At this time, the long rod of the "X"-shaped rod is suspended and arranged on the side of the crushing roller 21. In this scheme, the height of the long rod is the same as the axis of the crushing roller 21, and the long rod is located in front of the crushing roller 21 along the forward direction of the device;

[0034] The salt box 3 is arranged on the long rod of the cross-shaped rod, and the opening 31 is arranged obliquely downward;

[0035] The salt box 3 is a hollow quadrangular prism, and the opening 31 of the quadrangular prism salt box 3 is arranged obliquely downward, and the hinge shaft is arranged at the lower edge of the opening 31. Both hinge shafts are provided with springs, and the springs keep the baffle 32 in a state of abutting against the upper edge of the opening 31;

[0036] Specifically, the opening 31 of the hollow quadrangular prism-shaped salt box 3 is one of the hollowed-out bottom surfaces, the bottom surface is a rectangular opening 31, the rectangular opening 31 is tilted downward, and the long side of the rectangular opening 31 is parallel to the ground, and the angle between the extended line of the short side and the ground is an acute angle, and the lower long side of the rectangular opening 31 is provided with a rotating shaft 22, a spring is provided in the rotating shaft 22, and a baffle 32 is provided on the rotating shaft 22, and the spring makes the baffle 32 rotate along the rotating shaft 22 and cover the opening 31, at this time, the baffle 32 abuts against the upper long side of the opening 31;

[0037] When the device is running, the crushing roller 21 contacts the ice surface, and the reaction force of the ice surface is transmitted to the crushing roller 21 and the rotating shaft 22, and is transmitted to the salt box 3 along the rotating shaft 22 and the support 34. The force perpendicular to the ground during vibration is transmitted to the salt box 3, causing the salt box 3 to bump up and down. When the salt box 3 falls to the lowest point in one of the up and down cycles and rises again, the baffle 32 overcomes the spring force under the action of inertia. It rotates downward around the rotating shaft 22 to open the opening 31. The salt in the salt box 3 accumulates under the salt box 3 and leaks out from the opening 31 at the bottom of the salt box 3, completing the salting of the ice surface. When the rising speed decreases or decreases, the baffle 32 cannot overcome the spring force and closes again until the next time it rises again. During the opening and closing cycle of the baffle 32, the amount of salt to be spread is controlled to prevent the salt in the salt box 3 from losing quickly.

[0038] At the same time, the opening amplitude of the baffle 32 during the passage is related to the vibration amplitude. When the vibration is greater, the upward trend of the salt box 3 is greater during the up and down bumping cycle, the stronger the rotational inertia given to the baffle 32, the greater the opening amplitude, and the more salt is spread;

[0039] When the ice layer is thicker, the reaction force of the ice on the crushing roller 21 is greater during the ice breaking process of the crushing roller 21, and the vibration amplitude of the salt box 3 is greater. When the ice layer is thicker and more salt is needed to assist in ice breaking, the amount of salt is increased;

[0040] Too much salt will flow into the soil or farmland with the accumulated water and promote land salinization. Therefore, when the ice layer is thin and more salt is not needed, the amount of salt applied needs to be reduced. When the ice layer is thin, the vibration amplitude of the salt box 3 is smaller, which can reduce the amount of salt applied when the ice layer is thin and the amount of salt applied needs to be reduced.

[0041] By arranging supports 34 at both ends of the crushing roller 21, arranging the salt box 3 on the supports 34, and making the baffle 32 of the opening 31 of the salt box 3 arranged downwardly maintained in the state of blocking the opening 31 by a spring, the opening 31 of the salt box 3 can be opened and closed periodically, and while controlling the amount of salt spread, the size of the opening 31 when opened is related to the thickness of the ice surface, so that the amount of salt spread is increased when the ice layer thickness is large, and the amount of salt spread is reduced when the ice layer thickness is low, thereby making the amount of salt spread adjustable.

[0042] During use, a force is simply applied to the ice layer, and the ice breaking means is single, so a heating module is also included, and the heating module includes a plurality of heating rods, and the plurality of heating rods are arranged on the breaking roller 21;

[0043] Specifically, a plurality of heating rods are evenly arranged in the crushing roller 21 to provide heating for the crushing roller 21. When the heated crushing roller 21 contacts the ice surface, the heat therein can be transferred to the nearby ice surface to reduce the structural strength of the ice surface. Then, the heated crushing roller 21 contacts the ice surface. Compared with the unheated crushing roller 21, the heated crushing roller 21 contacts the ice surface and accelerates the melting of the ice surface. At this time, the heated crushing roller 21 can break the ice surface with a greater probability or to a greater extent, thereby improving the ice breaking efficiency.

[0044] The heating rod is provided to heat the crushing roller 21, thereby improving the ice breaking efficiency and the ice removing effect.

[0045] In the process of heating the ice layer by the crushing roller 21 provided with the heating rod, when the ice layer is melted, part of it turns into water vapor and floats upward, and part of the water vapor floating upward will float to the salt spreading port, and this part of the water vapor will enter the salt box 3 when the opening 31 of the salt box 3 is opened, and combine with the salt, causing the salt to accumulate at the opening 31. When this part of the salt water mixed accumulation is re-frozen in a low temperature environment, it will cause the opening 31 to be blocked. In order to prevent the accumulation from freezing, the heating module also includes an auxiliary heater, which is arranged at the opening 31 of the salt box 3;

[0046] In this embodiment, the auxiliary heater also includes a plurality of heating rods, which are arranged in the baffle 32 to continuously heat the baffle 32. When the salt water mixed deposit is at the opening 31, it is affected by the auxiliary heater to prevent freezing.

[0047] By arranging an auxiliary heater at the opening 31, the salt water mixed deposit is heated to prevent the salt water mixed deposit from refreezing and blocking the opening 31, thereby affecting the salt spreading and ice breaking efficiency.

[0048] Different auxiliary heater powers are required in different situations. For example, when the salt is in a small particle state and is located in an inclined salt box 3, due to the friction between them, the salt can be evenly distributed in the salt box 3. At this time, part of the salt's weight is pressed on the baffle 32, and part of the salt's weight is pressed on the inclined bottom plate. When part of the salt is hardened and forms a salt block, the ratio of surface area to volume decreases. When the ratio of surface area to volume decreases, the friction between the area and the surrounding salt cannot ensure that the salt block remains in place. The salt block will fall until it contacts the baffle 32 at the bottom. That is, the more the specific gravity of the agglomerated salt in the salt pile, the greater the pressure on the bottom baffle 32 relative to the non-agglomerated state. The larger the specific gravity of the agglomerated salt, the greater the probability of the agglomerated salt water mixed accumulation freezing, which will also affect the salt spreading. Therefore, when the pressure on the bottom baffle 32 is relatively greater, the power of the auxiliary heater needs to be increased; however, based on the need for the device to be mobile, the power supply for the auxiliary heater is usually provided by a battery or an internal combustion engine carried by the device, and the battery has a low power in an environment where ice breaking is required, and the internal combustion engine consumes a large amount of energy in an environment where ice breaking is required. Therefore, when a higher auxiliary heater power is not required, it is necessary to reduce the auxiliary heater power to save energy, so that the auxiliary heater maintains a lower power operation, reduces the probability of agglomeration and saves power consumption;

[0049] To this end, specifically, a control module is further included, the control module is electrically connected to the plurality of heating rods and the auxiliary heater, the control module is electrically connected to a pressure sensor, the pressure sensor is arranged at the opening 31 and is used to upload the pressure of the inner wall of the opening 31 to the control module, the control module determines whether the pressure exceeds a threshold value, and increases the power of the auxiliary heater when the pressure exceeds the threshold value;

[0050] In this embodiment, the pressure sensor is disposed at the opening 31 and is used to transmit the pressure y on the inner wall of the opening 31 to the control module, and the control module instructs the auxiliary heater to adjust its power to p, where p=y / y0×p0, y0 and p0 are pre-input constants;

[0051] When y is larger, it means that the specific gravity of the agglomerated salt is greater, resulting in a relatively greater pressure on the bottom baffle 32, and the power of the auxiliary heater needs to be increased. At this time, the value of p=y / y0×p0 is larger, and the specific gravity of the agglomerated salt is larger, and the power of the auxiliary heater is increased accordingly;

[0052] Similarly, when y is smaller, it means that the specific gravity of the agglomerated salt is smaller, resulting in a relatively smaller pressure on the bottom baffle 32, and there is no need to increase the power of the auxiliary heater. At this time, the value of p=y / y0×p0 is smaller, and when the specific gravity of the agglomerated salt is smaller, the power of the auxiliary heater is correspondingly reduced to save energy consumption;

[0053] An auxiliary heater is provided at the opening 31, and a control module is enabled to determine whether the pressure on the inner wall of the opening 31 exceeds a threshold value, and the power of the auxiliary heater is increased when the pressure on the inner wall of the opening 31 exceeds the threshold value, so that when the pressure on the inner wall of the opening 31 exceeds the threshold value and there is a high probability that salt agglomerates will accumulate at the opening 31, the power of the auxiliary heater is increased to alleviate the agglomeration of the salt pile and ensure the salt spreading efficiency; when the pressure on the inner wall of the opening 31 is lower than the threshold value and the probability of agglomeration is low, the power of the auxiliary heater is reduced to save energy.

[0054] During the above-mentioned use, due to the limited battery power or the high energy consumption of the internal combustion engine under the use environment, it is necessary to reduce energy consumption. At the same time, in order to compress the overall volume of the equipment, since the salt box 3 is suspended near the crushing roller 21 where the heating rod is located, the water vapor in the salt box 3 mainly comes from the heating of the ice layer by the heating rod in the heating module. Therefore, when the auxiliary heater is running, it is necessary to reduce the operating power of the heating rod of the heating module to reduce power consumption and reduce water vapor generation. For this purpose, the control module adjusts the power of the heating rod to pj, where pj=p0 / p×pj0, where pj0 is the pre-input standard power of the heating rod;

[0055] When the auxiliary heater power p is large, it is necessary to reduce the operating power of the heating module heating rod. At this time, the value of pj=p0 / p×pj0 is reduced, and when the auxiliary heater power is increased, the operating power of the heating module heating rod is correspondingly reduced.

[0056] When the auxiliary heater power p is small, there is no need to reduce the operating power of the heating module heating rod. At this time, it is necessary to ensure the power of the heating rod as much as possible to ensure the ice-breaking effect. At this time, the value of pj=p0 / p×pj0 increases, and when the auxiliary heater power is reduced, the operating power of the heating module heating rod is correspondingly reduced to ensure the ice-breaking effect.

[0057] By reducing the power of the heating rod when the auxiliary heater power increases, and increasing it when the auxiliary heater power is low, when agglomeration occurs and the auxiliary heater power is high, it is necessary to reduce the operating power of the heating rod of the heating module, thereby reducing power consumption and water vapor generation. When the agglomeration phenomenon is not obvious and the auxiliary heater power is low, the power of the heating rod is increased to ensure the ice-breaking effect.

[0058] After the crushing roller 21 crushes the ice layer, the ice surface is often only preliminarily crushed and needs to be further crushed. For this purpose, a rolling roller 4 is arranged behind the crushing roller 21 in the forward direction;

[0059] After the crushing roller 21 crushes the ice surface, as the device moves forward, the rolling roller 4 subsequently comes to the position where the crushing roller 21 crushes the ice surface, and further rolls the crushed ice surface.

[0060] When the salt block is not frozen, the salt in the salt box 3 still has a probability of accumulating and agglomerating under the influence of gravity or friction, which affects the salt spreading. For this reason, a stirring rod 33 is provided in the salt box 3, and the stirring rod 33 is transmission-connected to the crushing roller 21;

[0061] Specifically, the stirring rod 33 and the rotating shaft 22 of the crushing roller 21 enable the stirring rod 33 to rotate synchronously when the crushing roller 21 rotates, and the stirring rod 33 crushes the agglomerated salt blocks. At the same time, the stirring rod 33 will only rotate when the crushing roller 21 rotates. Compared with the additional setting of an external drive to drive the stirring rod 33, the probability of the stirring rod 33 idling and wasting energy is reduced.

[0062] The working principle and use process of the present invention:

[0063] The crushing roller 21 contacts the ice surface, and the reaction force of the ice surface is transmitted to the crushing roller 21 and the rotating shaft 22, and is transmitted to the salt box 3 along the rotating shaft 22 and the support 34. The force perpendicular to the ground during the vibration is transmitted to the salt box 3, causing the salt box 3 to bump up and down. When the salt box 3 falls to the lowest point in one of the up and down cycles and rises again, the baffle 32 overcomes the spring force under the action of inertia. It rotates downward around the rotating shaft 22 to open the opening 31. The salt in the salt box 3 accumulates below the salt box 3 and leaks out from the opening 31 at the bottom of the salt box 3, completing the salting of the ice surface. When the rising speed decreases or decreases, the baffle 32 cannot overcome the spring force and closes again until the next time it rises again. During the opening and closing cycle of the baffle 32, the amount of salt to be spread is controlled to prevent the salt in the salt box 3 from losing quickly.

[0064] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A highway maintenance device, characterized in that: It includes a crushing assembly, which includes a main body, a salt box and a crushing roller. The salt box is connected to a support, and the two ends of the support are respectively connected to the two ends of the crushing roller axial direction, and the middle part of the support is connected to the salt box. The support allows the salt box to be suspended at the front end of the crushing roller; An opening is arranged below the salt box, a baffle is hingedly arranged on the opening, a spring is arranged at the hinge shaft connecting the baffle and the opening, and the spring enables the baffle to maintain a state of blocking the opening.

2. A highway maintenance device according to claim 1, characterized in that: The salt box is in the shape of a hollow quadrangular prism, the opening of the quadrangular prism is arranged obliquely downward, the hinge shaft is arranged at the lower edge of the opening, and both hinge shafts are provided with springs, which maintain the baffle in a state of abutting against the upper edge of the opening.

3. A highway maintenance device according to claim 1, characterized in that: It also includes a heating module, which includes a plurality of heating rods, and the plurality of heating rods are arranged on the crushing roller.

4. A highway maintenance device according to claim 3, characterized in that: The heating module also includes an auxiliary heater, which is arranged at the opening of the salt box.

5. A highway maintenance device according to claim 4, characterized in that: It also includes a control module, which is electrically connected to a plurality of heating rods and an auxiliary heater. The control module is electrically connected to a pressure sensor, which is arranged at the opening and is used to upload the pressure of the inner wall of the opening to the control module. The control module determines whether the pressure exceeds a threshold value, and increases the power of the auxiliary heater when the pressure exceeds the threshold value.

6. A highway maintenance device according to claim 5, characterized in that: The pressure sensor is arranged at the opening and is used to upload the pressure y of the inner wall of the opening to the control module. The control module instructs the auxiliary heater to adjust its power to p, wherein p=y / y0×p0, y0 and p0 are pre-input constants.

7. A highway maintenance device according to claim 6, characterized in that: The control module adjusts the power of the heating rod to pj, where pj=p0 / p×pj0, and pj0 is the pre-input standard power of the heating rod.

8. The highway maintenance device according to claim 1, characterized in that: Along the forward direction of the curing device, a rolling roller is arranged behind the crushing roller.

9. A highway maintenance device according to claim 1, characterized in that: A stirring rod is arranged in the salt box, and the stirring rod is drivingly connected with the crushing roller.

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