Railway traffic sanding device capable of preventing clogging

Abstract

The utility model discloses a track traffic sanding device of being able to prevent blockage relates to track traffic device technical field, including sand storage box, control system component, connecting block, nozzle and fixing frame, the inner wall of sand storage box is fixedly connected with motor mounting bracket through screw, the inside installation of motor mounting bracket has servo motor, the lower bottom of sand storage box is fixedly connected with closed seat, is established in the inside of closed seat and has the mounting groove, the inside mounting of mounting groove has spiral axle, the outer wall fixed cover of spiral axle has spiral rotor, the inside installation of sand storage box has two heating pipes, the utility model discloses, through setting stirring mechanism at the sand outlet, can effectively break the formed agglomerate, promote sand material even smooth falling, set up heating device in sand storage box, can heat the inside of box body, improve sand grain ambient temperature, prevent the condensation or be absorbed after the invasion of external humidity, the adhesion and the agglomeration of sand grain because of the phenomenon of dampening are suppressed.

Description

Technical Field

[0001] This utility model relates to the field of rail transit equipment technology, specifically a rail transit sand spreading device that can prevent blockages. Background Technology

[0002] In rail transit systems, sand spreading devices are one of the key components ensuring train operation safety. Their main function is to spread a fixed amount of dry sand on the rail surface when the train starts, brakes, or runs on wet or slippery tracks. This increases the friction between the wheels and the rail, prevents the wheels from spinning or slipping, thereby improving traction efficiency and braking performance, and ensuring driving safety. Currently, widely used sand spreading devices typically include components such as sand storage tanks, sand supply pipelines, control valves, and nozzles. Among them, the sand storage tank is used to store dry quartz sand or special friction sand. However, in actual operation, existing sand spreading devices generally suffer from a serious technical problem that affects their reliability—clogging caused by the sand particles becoming damp and clumping together.

[0003] Due to the complex and variable operating environment of trains, which frequently pass through rainy areas, high-humidity zones, tunnels, or coastal areas, external moisture can easily penetrate into the sand storage box through the vents, gaps in the inspection cover, or the sand discharge port. Once the sand particles absorb moisture, they will deliquesce and stick together, gradually forming clumps or lumps. These lumps are difficult to pass through the sand discharge pipeline under the action of gravity, and are prone to causing blockages at bends, valves, or nozzles, resulting in poor sand distribution or even complete interruption. Especially in low-temperature environments, wet sand may freeze into lumps, further aggravating the risk of blockage. To ensure the normal operation of the system, maintenance personnel need to frequently inspect and clean the sand storage box and pipelines, and replace the damp sand, which not only increases maintenance costs and workload, but also reduces the operating efficiency of the train.

[0004] Therefore, developing a new sand-spreading device that prevents clogging is of great significance for ensuring the safe operation of trains around the clock. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a sand spreading device for rail transit that can prevent blockages.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a sand spreading device for rail transit that can prevent blockages, comprising a sand storage box, a control system assembly, a connecting block, a nozzle, and a fixing frame;

[0007] The inner wall of the sand storage box is fixedly connected to a motor mounting bracket by screws. A servo motor is installed inside the motor mounting bracket. A closed seat is fixedly connected to the bottom surface of the sand storage box. An installation groove is opened inside the closed seat. A spiral shaft is installed inside the installation groove. A spiral rotor is fixedly sleeved on the outer wall of the spiral shaft.

[0008] The sand storage tank is equipped with two sets of heating tubes. The heating tubes are inserted into the sand storage tank through slots opened through the outer wall, and one end of the heating tube is fixedly installed in the slot. A conductive rod is installed at the connection of the heating tube. A heating wire is installed inside the heating tube and connected to the conductive rod. The middle part of the heating tube is filled with magnesium oxide powder.

[0009] As described above, the left side of the sand storage tank is connected to the control system component via a pipeline, the lower right side of the sand storage tank is connected to a connecting block via a pipeline, the upper end of the connecting block is equipped with a fixing frame, and the right side of the connecting block is connected to a nozzle.

[0010] The aforementioned control system components include a train control unit, a sand-spreading control module, and sensor inputs. The control system components control a compressed air source provided by the train braking system, which outputs through an internal pipeline.

[0011] As mentioned above, a sealing cover is installed at the sand inlet on the right side of the sand storage box, and a silicone rubber sealing ring is fitted around the corner of the sealing cover.

[0012] As described above, the outer wall array of the motor mounting bracket has multiple sets of heat dissipation holes, and the power supply line of the servo motor passes through the slots opened on the top of the motor mounting bracket and the top surface of the sand storage box.

[0013] As described above, a connecting shaft is fixedly connected to the upper top surface of the spiral shaft, and the upper top surface of the connecting shaft is connected to the output end of the servo motor through a slot in the lower wall of the motor mounting bracket.

[0014] As described above, the lower wall of the closed seat is provided with a discharge hole, a notch is provided on one side of the bottom surface of the spiral shaft, and the outer diameter of the spiral rotor is smaller than the inner diameter of the mounting groove.

[0015] Compared with existing technologies, this rail transit sand spreading device that can prevent blockages has the following beneficial effects:

[0016] I. This utility model, by setting a stirring mechanism at the sand outlet, can effectively disturb the sand particles deposited at the bottom of the box during the sand spreading process or periodically start stirring, break up any possible clumps, promote the uniform and smooth falling of sand, and avoid the problem of poor sand discharge caused by long-term static or slightly damp conditions.

[0017] II. This utility model, by setting a heating device inside the sand storage box, intermittently heats the inside of the box, increases the ambient temperature of the sand particles, significantly reduces the relative humidity, and prevents external moisture from condensing or being absorbed by the sand particles after intrusion, fundamentally inhibiting the phenomenon of sand particles deliquescing, sticking, and clumping due to moisture.

[0018] Other advantages, objectives and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be taught from the practice of this invention. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a partial structural side view of the present invention;

[0021] Figure 3 This is a schematic cross-sectional view of the internal structure of the sand storage box of this utility model;

[0022] Figure 4 This is a cross-sectional schematic diagram of the internal structure of the heating tube of this utility model.

[0023] In the diagram: 1. Sand storage box; 101. Control system component; 102. Connecting block; 103. Nozzle; 104. Fixing frame; 2. Sealing cover; 201. Motor mounting bracket; 202. Servo motor; 203. Heat dissipation hole; 204. Sealing seat; 205. Mounting groove; 206. Connecting shaft; 207. Screw shaft; 208. Screw rotor; 209. Discharge hole; 3. Heating tube; 301. Conductive rod; 302. Magnesium oxide powder; 303. Heating wire. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] like Figure 1-4 As shown, this utility model provides a technical solution: a sand spreading device for rail transit that can prevent blockage, including a sand storage box 1, a control system component 101, a connecting block 102, a nozzle 103 and a fixing frame 104. The left side of the sand storage box 1 is connected to the control system component 101 through a pipeline, and the lower right side of the sand storage box 1 is connected to the connecting block 102 through a pipeline. The fixing frame 104 is installed at the upper end of the connecting block 102, and the nozzle 103 is connected to the right side of the connecting block 102.

[0026] The inner wall of the sand storage box 1 is fixedly connected to a motor mounting bracket 201 by screws. A servo motor 202 is installed inside the motor mounting bracket 201. A closed seat 204 is fixedly connected to the bottom surface of the sand storage box 1. An installation groove 205 is opened inside the closed seat 204. A spiral shaft 207 is installed inside the installation groove 205. A spiral rotor 208 is fixedly sleeved on the outer wall of the spiral shaft 207.

[0027] Two sets of heating tubes 3 are installed inside the sand storage box 1. The heating tubes 3 are inserted into the sand storage box 1 through slots opened through the outer wall, and one end of the heating tube 3 is fixedly installed in the slot. A conductive rod 301 is installed at the connection of the heating tube 3. A heating wire 303 is provided inside the heating tube 3 and connected to the conductive rod 301. The middle part of the heating tube 3 is filled with magnesium oxide powder 302.

[0028] Based on the overall structure of the device, by setting up a stirring mechanism at the sand outlet, the stirring can be activated during the sand spreading process or periodically to effectively disturb the sand particles deposited at the bottom of the tank, break up any possible clumps, promote the uniform and smooth falling of the sand, and avoid the problem of poor sand discharge caused by long-term static or slightly damp conditions. Furthermore, by setting up a heating device in the sand storage tank 1, the interior of the tank is heated intermittently to increase the ambient temperature of the sand particles, significantly reduce the relative humidity, and prevent external moisture from condensing or being absorbed by the sand particles. This fundamentally inhibits the phenomenon of sand particles deliquescing, sticking, and clumping due to moisture.

[0029] like Figure 1 As shown, the left side of the sand storage tank 1 is connected to the control system component 101 via a pipeline, and the lower right side of the sand storage tank 1 is connected to a connecting block 102 via a pipeline. A fixing frame 104 is installed on the upper end of the connecting block 102, and a nozzle 103 is connected to the right side of the connecting block 102.

[0030] The operation of the entire equipment is controlled by the control system component 101, while the mounting bracket 104 is used to install the entire pipeline on the frame.

[0031] like Figure 1 As shown, the control system component 101 includes a train control unit, a sand-spreading control module, and sensor inputs. The control system component 101 controls a compressed air source provided by the train braking system, and the compressed air source is output through the pipeline.

[0032] By using the control system component 101 to control the compressed air source, the sand particles are blown out from the nozzle 103 by the airflow after falling.

[0033] like Figure 2 As shown, a sealing cover 2 is installed at the sand inlet on the right side of the sand storage box 1, and the corners of the sealing cover 2 are fitted with sealing rings made of silicone rubber.

[0034] By installing a sealing cover 2, and with silicone rubber sealing rings fitted around the corners of the sealing cover 2, it can be sealed when no material is added, increasing the sealing effect and preventing moisture and rainwater from seeping in.

[0035] like Figure 3 As shown, the outer wall array of the motor mounting bracket 201 has multiple sets of heat dissipation holes 203, and the power supply line of the servo motor 202 passes through the slots opened on the top of the motor mounting bracket 201 and the top surface of the sand storage box 1.

[0036] By opening multiple sets of heat dissipation holes 203 on the outer wall of the motor mounting bracket 201, not only can the heat dissipation of the servo motor 202 be facilitated, but the heat emitted by the servo motor 202 can also increase the internal temperature of the sand storage box 1 to a certain extent.

[0037] like Figure 3 As shown, a connecting shaft 206 is fixedly connected to the upper top surface of the spiral shaft 207. The upper top surface of the connecting shaft 206 is connected to the output end of the servo motor 202 through a slot in the lower wall of the motor mounting bracket 201.

[0038] By using the connecting shaft 206 as a power transmission, the output end of the servo motor 202 can drive the spiral shaft 207 and the spiral rotor 208 to rotate through the connecting shaft 206, thereby stirring the sand particles to be output and preventing clumping.

[0039] like Figure 3 As shown, the lower wall of the closed seat 204 has a discharge hole 209, and a notch is provided on one side of the bottom surface of the spiral shaft 207. The outer diameter of the spiral rotor 208 is smaller than the inner diameter of the mounting groove 205.

[0040] By providing a discharge hole 209 on the lower wall of the closed seat 204, sand particles can flow out from the discharge hole 209.

[0041] Working Principle: This device is generally used on trains to spray sand onto the tracks. During spraying, the control system component 101 operates through the control unit, which sprays compressed air through the pipes. As the sand particles fall, they are impacted by the airflow and ejected from the nozzle 103. These are all existing devices and technologies, and will not be described in detail here. Because trains frequently encounter rainy and high-humidity environments during operation, moisture can enter the sand storage box 1 through the vent, inspection cover gaps, or sand outlet. The sand particles, usually quartz sand or special friction sand, have a certain degree of hygroscopicity. After absorbing moisture, the surface becomes sticky, and the particles stick together, gradually forming clumps or hard lumps. This can lead to clumping and blockage. Therefore, when the sand particles flow out... The servo motor 202 drives the spiral shaft 207 and spiral rotor 208 for selective stirring, so that the sand particles are squeezed during output, and even if they are clumped, they will be broken up. At the same time, a heating tube 3 is set. When the heating tube 3 is energized through the conductive rod 301, the current passes through the heating wire 303. Since the heating wire 303 material has high resistance, the electrical energy is converted into heat energy. In addition, the magnesium oxide powder 302 filling has excellent thermal conductivity, which can efficiently transfer the heat generated by the heating wire to the outer metal sheath tube. In this way, the internal sand particles can be heated periodically, maintaining the internal temperature of the sand particles and significantly reducing the relative humidity. This prevents external moisture from invading and condensing or being absorbed by the sand particles, fundamentally inhibiting the phenomenon of sand particles deliquescence, adhesion and clumping due to moisture.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sand spreading device for rail transit capable of preventing blockages, comprising a sand storage tank (1), a control system assembly (101), a connecting block (102), a nozzle (103), and a fixing frame (104); characterized in that The inner wall of the sand storage box (1) is fixedly connected to a motor mounting bracket (201) by screws. A servo motor (202) is installed inside the motor mounting bracket (201). A closed seat (204) is fixedly connected to the bottom surface of the sand storage box (1). An installation groove (205) is opened inside the closed seat (204). A spiral shaft (207) is installed inside the installation groove (205). A spiral rotor (208) is fixedly sleeved on the outer wall of the spiral shaft (207). The sand storage box (1) is equipped with two sets of heating tubes (3). The heating tubes (3) are inserted into the sand storage box (1) through slots opened through the outer wall. One end of the heating tube (3) is fixedly installed in the slot. A conductive rod (301) is installed at the connection of the heating tube (3). A heating wire (303) is provided inside the heating tube (3) and connected to the conductive rod (301). The middle part of the heating tube (3) is filled with magnesium oxide powder (302).

2. The rail transit sanding device capable of preventing clogging according to claim 1, characterized in that: The left side of the sand storage tank (1) is connected to the control system component (101) through a pipeline. The lower right side of the sand storage tank (1) is connected to a connecting block (102) through a pipeline. A fixing frame (104) is installed on the upper end of the connecting block (102). A nozzle (103) is connected to the right side of the connecting block (102).

3. The rail transit sanding device capable of preventing clogging according to claim 1, characterized in that: The control system component (101) includes a train control unit, a sand-spreading control module, and sensor inputs. The control system component (101) controls a compressed air source provided by the train braking system, which is output through an internal pipeline.

4. The rail transit sanding device capable of preventing clogging according to claim 1, characterized in that: A sealing cover (2) is installed at the sand inlet on the right side of the sand storage box (1), and a silicone rubber sealing ring is fitted on the corner of the sealing cover (2).

5. The track traffic sanding device capable of preventing clogging according to claim 1, wherein: The outer wall array of the motor mounting bracket (201) has multiple sets of heat dissipation holes (203), and the power supply line of the servo motor (202) passes through the slots opened on the top of the motor mounting bracket (201) and the top surface of the sand storage box (1).

6. The track traffic sanding device capable of preventing clogging according to claim 1, wherein: The upper top surface of the spiral shaft (207) is fixedly connected to a connecting shaft (206), and the upper top surface of the connecting shaft (206) is connected to the output end of the servo motor (202) through a slot in the lower wall of the motor mounting bracket (201).

7. The track traffic sanding device capable of preventing clogging according to claim 1, wherein: The lower wall of the closed seat (204) is provided with a discharge hole (209), and a notch is provided on one side of the bottom surface of the spiral shaft (207). The outer diameter of the spiral rotor (208) is smaller than the inner diameter of the mounting groove (205).

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