Constant-temperature protection device for pneumatic switch machine in railway hump yard

Abstract

The utility model relates to the technical field of switch machine equipment, in particular to a constant-temperature protection device for a pneumatic switch machine in a railway hump yard. The device comprises an inverted-U-shaped inner plate and an inverted-U-shaped outer plate, the outer plate is arranged on the outer side of the inner plate in a sleeving mode, and a pipe hole for a pressure air pipe of the switch machine to penetrate through is formed in the lower portion of one side of the inner plate and the lower portion of one side of the outer plate. A heating sheet is arranged between the inner plate and the outer plate; the heat preservation device is simple in structure, materials are easy to obtain, the heat preservation device can be rapidly produced and manufactured, a relatively closed heat preservation space can be formed on the outer side of the air cylinder in the switch machine after the heat preservation device is installed, the heat preservation capacity of the air cylinder and core components connected with the air cylinder is greatly improved, and the equipment operation and heating difficulty in low-temperature weather is greatly reduced; the built-in heating piece can keep the temperature at the air cylinder stable, the temperature rise is fast, the heating area is large, heat can be conducted to all areas of the inner plate, compared with traditional single-point simple resistance heating, heating is more uniform, heat dead angles are eliminated, the flexibility of a rubber sealing piece of pneumatic equipment is ensured, and safe and stable operation of the equipment in winter is ensured.

Description

Technical Field

[0001] This utility model relates to the field of railway equipment technology, specifically to a constant temperature protection device for a wind-driven switch machine in a railway hump yard. Background Technology

[0002] The railway hump yard is the main work area for de-marshalling and re-marshalling vehicles in a railway marshalling yard. It makes extensive use of pneumatic equipment, such as the ZK4 switch machine and retarders in the hump yard, which require air control. Because they need to work outdoors for a long time, they face harsh environmental conditions, especially in winter when there are large temperature differences between day and night. Under low temperature conditions, the compressed air in the air cylinders and pipelines inside the pneumatic equipment is prone to condensation. If the internal temperature is low, ice can easily form, causing pipeline blockage and blockage of the air outlet of the solenoid valve. Severe blockage can cause the equipment to malfunction. Low temperature conditions will also reduce the flexibility of the rubber seals inside the air pipes, affecting the sealing performance and causing air leakage in the cylinders. This directly affects the locking force of the ZK4 switch machine on the switch rail, which can cause the switch to fail to reach the correct position or lock. When the train passes through the switch, the switch rail vibrates, affecting the operation of the switch. Due to the large temperature difference between day and night in recent years, frost formation at the contact points can easily occur, affecting contact performance. Existing equipment is equipped with heating devices, typically using built-in resistance thermometers (RTDs) for electric heating. However, the large internal space of the equipment enclosure, coupled with the small heating resistor area and air circulation through the outer shell, makes heat loss easy and difficult to guarantee heating efficiency. This is especially true in recent winters with large temperature differences between day and night, and sudden drops in nighttime temperatures below -20 degrees Celsius. Because the resistance heating area is small and the heating is localized, areas slightly further from the resistor experience a significant temperature drop, particularly affecting the air cylinder and solenoid valve. In recent winters, the large temperature difference between day and night, with maximum differences approaching -20 degrees Celsius, coupled with the slow heating and poor temperature stability of current resistance heating systems, results in heating dead zones. Utility Model Content

[0003] The purpose of this utility model is to provide a reasonably designed constant temperature protection device for a wind-driven switch machine in a railway hump yard, which can solve the above-mentioned defects and deficiencies of the existing technology.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: it comprises an inverted "U"-shaped inner plate and an outer plate, with the outer plate fitted over the outer side of the inner plate, and the two are assembled together. The inner plate and the outer plate have pipe holes at the bottom of one side for the pressure air pipe of the switch machine to pass through, and the top of the pipe holes is semi-circular. A heating element is provided between the inner plate and the outer plate.

[0005] Preferably, the edges of the inner panel are bent by sheet metal bending to form a bent portion, which is then connected to the outer panel to form an integral structure.

[0006] Preferably, the heating element is disposed between the top sides of the inner plate and the outer plate.

[0007] Preferably, a power cord is connected to the heating element, and holes are formed between the two ends of the bent portion at both ends of the top surface of the inner plate and the outer plate, through which the power cord passes.

[0008] The beneficial effects of this utility model after adopting the above structure are:

[0009] 1. This utility model has a simple structure, readily available materials, and can be manufactured quickly. After installation, it forms a relatively enclosed, insulated space inside the ZK4 switch machine for the outer side of the air cylinder, significantly improving the insulation capacity of the air cylinder and its connected core components. It also ensures the flexibility of the rubber seals inside the air cylinder, reducing the risk of air leakage affecting normal equipment operation. Furthermore, it significantly reduces the difficulty of equipment operation and heating under conditions of large diurnal temperature differences and sudden temperature drops.

[0010] 2. This utility model has a built-in heating element, which increases the heating area and heats up quickly. Constant temperature heating can be achieved through external control, thereby maintaining a stable temperature at the air cylinder. During the heating process, this heat preservation device can conduct heat to all areas of the inner plate, achieving multi-angle uniform heating with the top surface as the main component and the sides as the auxiliary component. Compared with the traditional single-point simple resistance heating, the heating is faster and more uniform, achieving heating without dead angles. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the external structure of this utility model;

[0012] Figure 2 This is a partial internal structural diagram of the switch machine without the present invention installed;

[0013] Figure 3 This is a partial internal structural diagram of the switch machine after the present invention has been installed;

[0014] Figure 4 This is a schematic diagram of the heating element in this utility model.

[0015] Explanation of reference numerals in the attached figures:

[0016] 1. Inner panel; 2. Outer panel; 3. Bending section; 4. Pipe hole; 5. Outer casing; 6. Reversing valve; 7. Pressure air duct; 8. Heating element; 9. Power cord. Detailed Implementation

[0017] 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.

[0018] See Figure 1 , Figure 4 As shown, it includes an inverted "U"-shaped inner plate 1 and an outer plate 2. The outer plate 2 is fitted over the outer side of the inner plate 1. The edges of the inner plate 1 are bent into bends 3 by sheet metal bending, which are connected to the outer plate 2 to form an integral structure. The inner plate 1 and the outer plate 2 have pipe holes 4 for the pressure air pipe 7 of the switch machine to pass through at the lower side of one side. The top of the pipe hole 4 is semi-circular. A heating element 8 is provided between the inner plate 1 and the outer plate 2. The heating element 8 is located between the top sides of the inner plate 1 and the outer plate 2. A power cord 9 is connected to the heating element 8. The two ends of the bends 3 at both ends of the top surface of the inner plate 1 and the outer plate 2 form holes that are connected inside and outside. The power cord 9 passes through one of the holes and connects to an external constant temperature control device.

[0019] See Figures 1-4 As shown, the structural length of the inner plate 1 and the outer plate 2 matches the length of the air cylinder inside the pneumatic switch machine, therefore... Figure 3 In this device, the protective device can be installed behind the reversing valve 6, inside the outer casing 5 of the switch machine, forming a relatively enclosed area with the bottom surface of the outer casing 5. This encloses the air cylinder, check valve, sealing ring, and other parts for insulation. The heating element 8 can heat the inside of the protective device through an external constant temperature control device to achieve constant temperature within the area. The pre-drilled pipe hole 4 allows the pressure air pipe 7 to pass through it without obstruction during installation.

[0020] It should be understood that the above-described specific embodiments of this utility model are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within the protection scope of this utility model. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A constant temperature protection device for a pneumatic switch machine in a railway hump yard, characterized in that: It consists of an inverted "U" shaped inner plate (1) and an outer plate (2), which are assembled together. The outer plate (2) is fitted over the outer side of the inner plate (1). The inner plate (1) and the outer plate (2) have a pipe hole (4) for the pressure air pipe (7) of the switch machine to pass through at the lower side of one side. The top of the pipe hole (4) is semi-circular. A heating element (8) is provided between the inner plate (1) and the outer plate (2).

2. The constant temperature protection device for a pneumatic switch machine in a railway hump yard according to claim 1, characterized in that: The inner panel (1) has a bent section (3) formed at its edge by sheet metal bending, which is connected to the outer panel (2) to form an integral structure.

3. The constant temperature protection device for a pneumatic switch machine in a railway hump yard according to claim 1, characterized in that: The heating element (8) is disposed between the top side of the inner plate (1) and the outer plate (2).

4. The constant temperature protection device for a pneumatic switch machine in a railway hump yard according to claim 3, characterized in that: The heating element (8) is connected to a power cord (9). The two ends of the bent part (3) at both ends of the top surface of the inner plate (1) and the outer plate (2) form a hole that is connected inside and outside. The power cord (9) passes through one of the holes.

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