Anti-skid sand injection gun for locomotives

Abstract

We provide anti-skid sand injection guns for locomotives. The system includes a gun body 1 and a gun head 2. The gun body is equipped with an electromagnetic ball valve 3 near the gun head. The rear end of the gun body is connected to the anti-skid sand supply pipe and supply hose. The gun body includes an annular hydraulic cylinder cavity and an intermediate gun tube. The rear end of the intermediate gun tube is inserted into the annular hydraulic cylinder cavity, and the intermediate gun tube is driven by an external hydraulic pump to move retractably along the annular hydraulic cylinder cavity. The gun head is fitted to the front end of the intermediate gun tube. A traction electromagnet and a direction-changing pulley are installed at the front end of the intermediate gun tube. The traction electromagnet is connected to a fixed post on the gun head via a traction rope, which passes through the direction-changing pulley. The traction electromagnet rotates the gun head by pulling the traction rope. This alleviates the technical problem of conventional sand-injection guns, which have a fixed length and a fixed gun head direction, making sand-injection operations inconvenient for different types of locomotives.

Description

[Technical Field]

[0001] Technical Field This utility model relates to the field of anti-skid sand injection technology for locomotives, and more particularly to an anti-skid sand injection gun for locomotives. [Background technology]

[0002] To improve running efficiency and reduce sliding friction between the wheels and rails when starting, going uphill, or braking, railway locomotives need to increase the friction between the wheels and rails. Spreading sand on the rails under the drive wheels is a widely used method both domestically and internationally. However, because the capacity of the locomotive's sand box, which stores spare sand, is limited, the box must usually be replenished with anti-skid sand (referred to as "sand loading" for short) after each section of operation, or after a certain number of starting, climbing, and braking operations. Therefore, the process of sand loading on locomotives is quite frequent. Summary of the Invention [Problem to be solved by the invention]

[0003] Prior to 2000, incomplete statistics indicated that sand loading on China's locomotive systems was traditionally performed entirely by hand. Specifically, sand was transported to the platform using a wheelbarrow and then intermittently dumped into the locomotive's sand box using a shovel. In the 21st century, through continuous research and improvement, some sand loading operations have been shifted to a semi-automated "manpower + machine" mode. Specifically, a pneumatic transport system is used to transport sand to the platform or the platform's sand tower, or to the platform directly, with workers using handheld sand loading guns to perform the loading. However, traditional sand loading guns have a fixed length and a fixed gun head orientation, making loading inconvenient due to the different sand box positions depending on the vehicle type.

[0004] Contents of the utility model SUMMARY OF THE INVENTION The object of the present invention is to provide an anti-skid sand injection gun for locomotives, in order to solve at least one of the above technical problems. [Means for solving the problem]

[0005] First, an embodiment of this utility model provides an anti-skid sand injection gun for locomotives, which includes a gun body and a gun head. The gun body has an electromagnetic ball valve installed near the gun head. The tail end of the gun body is connected to an anti-skid sand supply pipe and a supply hose. The gun body includes an annular hydraulic cylinder cavity and an intermediate gun tube. The tail end of the annular hydraulic cylinder cavity is connected to an external hydraulic pump via an oil passage inlet / outlet, and the annular hydraulic cylinder cavity is filled with hydraulic oil. The tail end of the intermediate gun tube is inserted into the annular hydraulic cylinder cavity, and the intermediate gun tube retracts and moves along the annular hydraulic cylinder cavity when driven by the external hydraulic pump. The gun head is fitted to the front end of the intermediate gun tube; a return spring is provided between the rear end of the gun head and the intermediate gun tube, and a traction electromagnet and a direction-changing pulley are provided at the front end of the intermediate gun tube, the traction electromagnet is connected to a fixed pole on the gun head via a traction rope, and the traction rope passes through the direction-changing pulley; the traction electromagnet pulls the traction rope to rotate the gun head.

[0006] The annular hydraulic cylinder cavity is formed by fitting an inner annular steel pipe and an outer annular steel pipe together, and the end of the inner annular steel pipe is connected to an anti-skid sand supply pipe via a supply hose.

[0007] Furthermore, the intermediate gun tube is provided with a positioning stroke groove, and the outer annular steel tube is provided with a limit bolt on its wall, which slides in the positioning stroke groove when the intermediate gun tube moves along the annular hydraulic cylinder cavity.

[0008] Furthermore, a sand feed hose protection structure is provided at the rear end of the gun body, and the sand feed hose protection structure is bell-shaped.

[0009] Furthermore, the sand feeding hose protection structure is made of steel plate material.

[0010] Furthermore, a terminal exhaust pipe is provided at the side of the front end of the intermediate gun tube.

[0011] Furthermore, a positioning bolt is provided at the front end of the intermediate gun tube, and a rotation positioning groove is provided at the gun head; when the gun head rotates at the front end of the intermediate gun tube, the positioning bolt slides within the rotation positioning groove.

[0012] The sand feed hose protective structure is made of steel plate. A terminal exhaust pipe is provided at the side of the front end of the intermediate gun tube. A positioning bolt is provided at the front end of the intermediate gun tube, and a rotation positioning groove is provided in the gun head. When the gun head rotates at the front end of the intermediate gun tube, the positioning bolt slides in the rotation positioning groove. [Effects of the Invention]

[0013] This utility model provides an anti-skid sand injection gun for locomotives with an extendable gun body and a rotatable gun head, which allows the gun to spray sand on various types of locomotives, solving the technical problem that the conventional gun has a fixed length and a fixed gun head direction, making it inconvenient to spray sand on different types of locomotives.

[0014] Drawing Description In order to more clearly describe the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings used in the description of specific embodiments or prior art. Needless to say, the drawings in the following description only show some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative efforts. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 1 is a side view of an anti-skid sand injection gun for a locomotive according to an embodiment of the present invention. [Figure 2] FIG. 2 is a side perspective view of an anti-skid sand injection gun for a locomotive according to an embodiment of the present invention. [Figure 3] FIG. 3 is a perspective view of an anti-skid sand injection gun for a locomotive according to an embodiment of the present invention. [Figure 4] FIG. 4 is an enlarged side view of a gun head portion according to an embodiment of the present invention. [Figure 5] FIG. 5 is an enlarged top view of the gun head portion according to an embodiment of the present invention. [Figure 6] FIG. 6 is a cross-sectional schematic view of a gun head according to an embodiment of the present invention. [Figure 7] FIG. 7 is a cross-sectional schematic view of another gun head according to an embodiment of the present invention. [Figure 8] FIG. 8 is an exploded view of an anti-skid sand injection gun for a locomotive according to an embodiment of the present invention. [Figure 9] FIG. 9 is a perspective view of another anti-skid sand injection gun for a locomotive according to an embodiment of the present invention. [Figure 10] FIG. 10 is a schematic diagram of an embodiment of the present invention in which the sand-feeding hose protection structure is not provided. [Figure 11] FIG. 11 is a schematic diagram showing a sand-transport hose protection structure according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0016] Specific Examples The following clearly and completely describes the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some of the embodiments of the present utility model, not all of them. Based on the embodiments of the present utility model, all other embodiments that can be obtained by a person skilled in the art without any creative work fall within the protection scope of the present utility model.

[0017] Figure 1 is a side view of an anti-skid sand injection gun for locomotives based on an embodiment of the present utility model. As shown in Figure 1, this injection gun includes a gun body 1 and a gun head 2. The gun body 1 is provided with an electromagnetic ball valve 3 located close to the gun head 2. The tail end of the gun body 1 is connected to an anti-skid sand supply pipe via a supply hose.

[0018] Specifically, the electromagnetic ball valve 3 is used to realize the sand injection start / stop function of the sand injection gun.

[0019] Figure 2 is a side perspective view of an anti-skid sand injection gun for locomotives based on an embodiment of the utility model. As shown in Figure 2, the gun body 1 includes an annular hydraulic cylinder cavity 4 and an intermediate gun tube 5. The rear end of the annular hydraulic cylinder cavity 4 is connected to an external hydraulic pump via an oil passage inlet / outlet 6, and the annular hydraulic cylinder cavity 4 is filled with hydraulic oil. The rear end of the intermediate gun tube 5 is inserted into the annular hydraulic cylinder cavity 4, and the intermediate gun tube 5 moves in and out along the annular hydraulic cylinder cavity 4 when driven by the external hydraulic pump.

[0020] Specifically, as shown in Figure 2, the annular hydraulic cylinder cavity 4 is formed by fitting an inner annular steel pipe 41 and an outer annular steel pipe 42 together. The end of the inner annular steel pipe 41 is connected to an anti-skid sand supply pipe and a supply hose. The space between the inner annular steel pipe 41 and the outer annular steel pipe 42 forms the annular hydraulic cylinder cavity 4.

[0021] Figure 3 is a perspective view of an anti-skid sand injection gun for a locomotive according to an embodiment of the present invention. As shown in Figure 3, a positioning stroke groove 51 is provided in the intermediate gun tube 5. As shown in Figure 2, a limit bolt 43 is provided in the pipe wall of the outer annular steel pipe 42. When the intermediate gun tube 5 moves in an expanding or contracting manner along the annular hydraulic cylinder cavity 4, the limit bolt 43 slides within the positioning stroke groove 51.

[0022] Specifically, in this embodiment of the utility model, the rear annular hydraulic cylinder of the sand injection gun is composed of two steel pipes with different inner diameters, each with a closed end and an oil passage inlet / outlet 6. Here, the oil inlet and outlet are the same pipe. The intermediate gun tube 5 is inserted into the annular hydraulic cylinder cavity 4 formed by the inner and outer steel pipes at its front end. The inner annular steel pipe 41 is the sand feeding pipe, and its end is connected to the sand feeding hose. The annular hydraulic cylinder cavity 4 is designed primarily to reduce the overall volume of the gun tube. Its main function is to allow the intermediate gun tube 5 to flexibly expand and contract during pressurization and depressurization, changing its length to meet the needs of different locomotive sand feeding scenarios. Upper and lower limit bolts 43 are installed between the inner and outer steel pipes, one to maintain the inner and outer steel pipes in a constant position and the other to limit the stroke of the movable intermediate gun tube.

[0023] Figure 4 is an enlarged side view of the gun head portion according to an embodiment of the present invention. As shown in Figure 4, the gun head 2 is fitted to the front end of the intermediate gun tube 5. A return spring 7 is installed between the rear end of the gun head 2 and the intermediate gun tube 5. Specifically, one end of the return spring 7 is fixed to the rear end of the gun head 2, and the other end is fixed to the outer wall of the intermediate gun tube 5.

[0024] Optionally, in an embodiment of the present invention, the gun head 2 is made of a steel tube material.

[0025] Specifically, as shown in Figure 4, a traction electromagnet 8 and a direction-changing pulley 9 are installed at the front end of the intermediate gun tube 5, and the traction electromagnet 8 is connected to a fixed pole 11 on the gun head 2 via a traction rope 10, which passes through the direction-changing pulley 9. The traction electromagnet 8 pulls the traction rope 10, thereby rotating the gun head 2.

[0026] Preferably, the tow rope 10 is an oil wire rope.

[0027] Preferably, as shown in FIG. 4, a terminal exhaust pipe 12 is further provided at the side of the front end of the intermediate gun tube 5 .

[0028] 5 is an enlarged overhead view of the gun head portion according to an embodiment of the present invention. As shown in FIG. 5, a positioning bolt 13 is further provided at the front end of the intermediate gun tube 5, and a rotation positioning groove 14 is provided in the gun head 2. When the gun head 2 rotates at the front end of the intermediate gun tube 5, the positioning bolt 13 slides in the rotation positioning groove 14.

[0029] FIG. 6 is a cross-sectional schematic diagram of a gun head according to an embodiment of the present invention. As shown in FIG. 6, after passing through the diverting pulley 9, the towing rope 10 changes direction, travels around the circumferential direction of the gun head tube, and connects with the fixed post 11. FIG. 7 is a cross-sectional schematic diagram of another gun head according to an embodiment of the present invention. As shown in FIG. 7, when the traction electromagnet 8 pulls the towing rope 10, the towing rope 10 pulls the fixed post 11, which approaches the diverting pulley 9, causing the gun head 2 to rotate along the intermediate gun tube 5 in the direction of the arrow in FIG. 7. When the traction electromagnet 8 releases the towing rope 10, the gun head 2 reverses due to the elastic action of the return spring 7 and returns to its original direction.

[0030] Figure 8 is a three-dimensional exploded view of an anti-skid sand injection gun for locomotives based on an embodiment of this utility model. As shown in Figure 8, the gun body 1 has an opening in the middle, where an electromagnetic ball valve 3 is installed. Synchronous control by an external controller is achieved to open and close the sand injection function into the gun tube. At the front end of the intermediate gun tube 5, parts such as a traction electromagnet 8, a direction-changing pulley 9, a return spring 7, and a traction rope 10 are arranged, forming the components that drive the direction change of the gun head 2.

[0031] Specifically, as shown in Figure 8, the rotatable gun head 2 at its tip is fitted onto the outer layer of the intermediate gun tube 5, and the gun head 2 is provided with two horizontal rectangular rotation positioning grooves 14, which are fitted to positioning bolts 13 on the expandable intermediate gun tube 5 in the middle layer. A return spring 7 is attached to the connection between the gun head 2 and the intermediate gun tube 5, and although the gun head 2 is normally facing downward, the action of the traction electromagnet 8 pulls the traction rope 10, which rotates the gun head 2 to a certain angle via the direction-changing pulley 9.

[0032] Optionally, Figure 9 is an overhead view of another anti-skid sand injection gun for locomotives based on an embodiment of the present invention. As shown in Figures 1 and 9, a sand feed hose protection structure 15 is further provided at the rear end of the gun body 1. The sand feed hose protection structure 15 is bell-shaped.

[0033] Optionally, the sand transport hose protection structure 15 is made of steel plate material.

[0034] Figure 10 is a schematic diagram of an embodiment of the present utility model without a sand feed hose protection structure. As shown in Figure 10, conventional anti-skid sand injection guns have their tips directly connected to the sand feed hose, which makes the sand feed hose prone to excessive bending, potentially causing hose damage or blockage of the sand feed path. Figure 11 is a schematic diagram of an embodiment of the present utility model with a sand feed hose protection structure. As shown in Figure 11, in this embodiment of the present utility model, a bell-shaped sand feed hose protection structure 15 is installed at the end of the sand injection gun, allowing the sand feed hose to bend at a large radius of curvature, preventing excessive bending of the sand feed hose, maintaining smooth anti-skid sand piping, and reducing the occurrence of sand feed hose damage.

[0035] From the above description, this utility model provides an anti-skid sand injection gun for locomotives with a telescopic gun body and a rotatable gun head, which makes the injection gun compatible with various types of locomotives and solves the technical problem that the conventional fixed length and fixed direction gun head makes it difficult to operate on different types of locomotives. At the same time, a sand feeding hose protection structure is provided at the tail end of the sand injection gun, which ensures that the sand feeding hose can operate even when the bending angle is at a large radius.

[0036] As will be apparent to those skilled in the art, the present invention is not limited to the details of the above-described embodiments, and may be embodied in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, in all respects, the embodiments should be considered illustrative and non-limiting, and the scope of the present invention is defined by the appended claims, not limited by the above description. Accordingly, all modifications that fall within the meaning and scope of the equivalence requirements of the claims are intended to be embraced by the present invention. Any drawing symbols in the claims should not be construed as limiting the scope of the claims.

[0037] Furthermore, although the present specification is described based on embodiments, it should be understood that each embodiment does not only include independent technical solutions. Such description of the specification is merely for the purpose of clarity, and those skilled in the art should take the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art. [Explanation of symbols]

[0038] 1. Gun body 2. Gunhead 3. Electromagnetic ball valve 4. Annular hydraulic cylinder cavity 41. Inner annular steel pipe 42, outer ring steel pipe 43. Limit bolt 5. Intermediate gun tube 51, positioning stroke groove 6, Oil channel entrance / exit 7. Return spring 8, traction electromagnet 9. Direction change pulley 10. Tow rope 11, fixed pillar 12. Terminal exhaust pipe 13. Positioning bolt 14. Rotation positioning groove 15. Sand transport hose protection structure

Claims

1. An anti-skid sand injection gun for locomotives, comprising a gun body and a gun head, the gun body having an electromagnetic ball valve installed near the gun head, the tail end of the gun body connected to an anti-skid sand supply pipe and a supply hose, the gun body having an annular hydraulic cylinder cavity and an intermediate gun tube, the tail end of the annular hydraulic cylinder cavity connected to an external hydraulic pump through an oil passage inlet / outlet, the annular hydraulic cylinder cavity filled with hydraulic oil; the tail end of the intermediate gun tube inserted into the annular hydraulic cylinder cavity, the intermediate gun tube extending and retracting along the annular hydraulic cylinder cavity by the drive of the external hydraulic pump; The gun head is fitted to the front end of the intermediate gun tube; a return spring is provided between the rear end of the gun head and the intermediate gun tube, and a traction electromagnet and a direction-changing pulley are provided at the front end of the intermediate gun tube, the traction electromagnet is connected to a fixed post on the gun head via a traction rope, and the traction rope passes through the direction-changing pulley; the traction electromagnet pulls the traction rope to rotate the gun head; An anti-skid sand injection gun for locomotives characterized by the above.

2. The annular hydraulic cylinder cavity is formed by fitting an inner annular steel pipe and an outer annular steel pipe; the end of the inner annular steel pipe is connected to an anti-skid sand supply pipe through a supply hose; 2. The anti-skid sand injection gun for a locomotive according to claim 1.

3. The intermediate gun tube is further provided with a positioning stroke groove, and a limit bolt is provided on the wall of the outer annular steel tube; when the intermediate gun tube moves along the annular hydraulic cylinder cavity, the limit bolt slides in the positioning stroke groove; 3. The anti-skid sand injection gun for a locomotive according to claim 2.

4. The rear end of the gun body is further provided with a sand feeding hose protection structure, which has a bell-shaped configuration; 4. The anti-skid sand injection gun for a locomotive according to claim 1.

5. The sand transport hose protective structure is made of steel plate material; 5. The anti-skid sand injection gun for a locomotive according to claim 4.

6. A terminal exhaust pipe is further provided at the side of the front end of the intermediate gun tube; 2. The anti-skid sand injection gun for a locomotive according to claim 1.

7. A positioning bolt is provided at the front end of the intermediate gun tube, and a rotation positioning groove is provided on the gun head; when the gun head rotates at the front end of the intermediate gun tube, the positioning bolt slides in the rotation positioning groove; 2. The anti-skid sand injection gun for a locomotive according to claim 1.

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