Radial waterproof shrinkage plugging device for railway wagon
By setting a combined structure of axial blind holes and radial holes at the constriction hole of the railway freight car control valve, the problem of insufficient waterproof and dustproof performance in the prior art is solved, and the stable and reliable operation of the valve and gas balance are achieved.
Patent Information
- Application Number
- CN202522786488.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-29
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-12-29
AI Technical Summary
The existing railway freight car control valve has poor waterproof and dustproof performance due to its constricted orifice structure. External dust, impurities, and water can easily enter, affecting the normal operation and stability of the valve.
A radial waterproof plugging device is adopted. By setting a combination of axial blind holes and radial holes on the plug head, gas can be extracted and discharged, preventing external impurities and water from entering, and maintaining the pressure balance inside and outside the relief valve.
It effectively prevents external impurities and water from entering the relief valve, improves gas extraction efficiency and safety reliability, and ensures the stable and reliable operation of the relief valve.
Smart Images
Figure CN223868624U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of relief valve shrinkage hole structure, concretely relates to a radial waterproof shrinkage device for railway freight car. BACKGROUND
[0002] The breathing hole has an important role in the railway freight car control valve, and its main function is to ensure that the connected chamber is communicated with the atmosphere, when the internal diaphragm moves to change the volume of the chamber, the pressure in the chamber is consistent with the atmosphere and is not affected by the volume change in the chamber, such as the breathing hole of the relief valve cover in the control valve, as shown in the figure. Figure 1 At present, the shrinkage hole of the relief valve cover used in the control valve of the railway freight car is an axial hole, and this structure has poor waterproof and dustproof performance. When the relief valve is self-locked, the relief valve piston drives the diaphragm to move upwards, and the air in the valve cover needs to be discharged through the shrinkage hole. When the relief valve is unlocked, the relief valve piston drives the diaphragm to move downwards, so that the shrinkage hole is in the process of inhaling, and if there is water or coal dust and other impurities on the hole, it may be directly inhaled into the valve, affecting the cleanliness of the valve and further affecting the performance of the control valve.
[0003] In view of the deficiencies of the existing relief valve shrinkage hole structure, external dust, impurities, water and other substances may enter the shrinkage hole, affecting the normal work of the relief valve, and being not conducive to the stable and reliable work of the equipment, which should be optimized and improved. Therefore, a more reasonable technical scheme needs to be proposed to solve the technical problems existing in the prior art. CONTENT OF THE UTILITY MODEL
[0004] In view of the problems existing in the prior art, the utility model discloses a radial waterproof shrinkage device for railway freight car, which improves the hole structure at the shrinkage hole, effectively avoids the direct entry of external dust, impurities and water into the hole, thereby ensuring the safe and reliable environment in the relief valve and enabling stable and reliable operation.
[0005] In order to achieve the above-mentioned purpose, the waterproof shrinkage device disclosed by the utility model can adopt the following scheme:
[0006] A radial waterproof shrinkage device for railway freight car, comprising a shrinkage head matched with a shrinkage hole, the inner end of the shrinkage head enters the shrinkage hole while the outer end is located outside the shrinkage hole, an axial blind hole extending towards the outer end of the shrinkage hole is formed from the inner end of the shrinkage hole, and a radial hole communicating with the axial blind hole is formed from the side surface of the shrinkage head body, when the relief valve forms a pressure difference with the external environment, gas flows through the radial hole and the axial blind hole to maintain the air pressure balance inside and outside the relief valve.
[0007] The aforementioned waterproof sealing device, through a structure combining axial blind holes and radial holes, enables the relief valve to extract gas, helping to maintain internal and external air pressure balance. The combination of axial blind holes and radial holes effectively prevents external dust, impurities, and water from entering the relief valve, thus contributing to a stable and reliable internal environment and facilitating better valve operation.
[0008] Furthermore, the radial holes are used to connect the external environment with the axial blind holes. Their number and arrangement can employ various schemes; here, we optimize and propose one feasible option: the radial holes connect to the inner port of the axial blind holes. When using this scheme, the radial holes are perpendicular to the axial blind holes.
[0009] Furthermore, when the number of radial holes is greater than one, different included angles can be set between the radial holes. Different included angles can affect the rate of air extraction and degassing. Here, optimization is proposed, and one feasible option is suggested: the number of radial holes is at least two, and the radial holes are arranged opposite each other to form a through hole. When adopting the above scheme, the number of radial holes can be set to two, and they are aligned with the through-hole plug.
[0010] Furthermore, when the plug is positioned at the plugging orifice, it is typically connected via a threaded connection. However, impurities can easily accumulate at the threads and enter the radial hole, affecting the safe operation of the relief valve. To address this, an optimization is proposed: a threaded connection section is formed on the plug, which mates with the plugging orifice, while a gap is created between the radial hole and the threaded connection section. Using this solution, the gap between the radial hole and the threaded connection section prevents impurities and water from entering the radial hole, thus facilitating a stable and reliable environment within the relief valve.
[0011] Furthermore, in some solutions, to prevent external dust, impurities, and water from entering through the radial hole, an optimization is proposed, and one feasible option is to form a radial boss at the outer end of the plug body. When this solution is adopted, the radial boss can block external dust and impurities from entering, maintaining a safe and reliable environment within the radial hole.
[0012] Furthermore, the radial boss can be constructed in various forms and is not limited to a single one. Here, we optimize and propose one feasible option: the radial boss extends continuously along the side surface of the plug to form a convex ring structure. When the above scheme is adopted, the radial boss and the plug are integrally formed.
[0013] Furthermore, to facilitate the installation and removal of the shrink plug, an optimization is proposed, and one feasible option is suggested: the outer end of the shrink plug is also formed with a screw groove. When adopting the above solution, the screw groove can be a straight groove or a cross groove.
[0014] Furthermore, to further prevent external impurities from entering the relief valve and to effectively block them, an optimization is proposed, and one feasible option is suggested: the axial blind orifice gradually enlarges in diameter as it extends from the inner end to the outer end of the plug. With this scheme, the diameter of the axial blind orifice is a variable value. When external gas enters the axial blind orifice, the orifice diameter decreases as the gas is transported. When external impurities enter, the decreasing orifice diameter blocks them, preventing them from entering the relief valve. Conversely, when gas is released from the relief valve, the orifice diameter increases as the gas is transported, resulting in smoother gas flow.
[0015] Furthermore, the radial and axial holes employ the same adjustment settings. Here, an optimization is proposed, and one feasible option is suggested: the radial hole gradually decreases in diameter as it extends inward from the side surface of the plug, with the minimum diameter of the radial hole equal to the maximum diameter of the axial blind hole. Using this scheme, the radial hole and the axial blind hole are connected, allowing for smooth transitions in diameter, ensuring smooth gas delivery while maintaining effective blocking of external impurities.
[0016] Furthermore, when there is a need for increased exhaust volume, the exhaust volume can be improved by modifying the arrangement of the radial holes. Here, we propose one feasible option: the radial holes are evenly spaced along the circumference of the side surface of the plug. With this approach, the more radial holes there are, the higher the efficiency of exhaust and the stronger the ability to resist impurity blockage.
[0017] Furthermore, the number of axial blind holes also affects the gas flow rate of the relief valve. Here, optimization is proposed, and one feasible option is suggested: the number of axial blind holes is several, distributed in multiple circumferential layers on the inner end of the plug, with the diameter of the inner layer axial blind holes being larger than the diameter of the outer layer axial blind holes. When adopting the above scheme, the axial blind holes include a central axial blind hole and several outer layer axial blind holes, with each axial blind hole corresponding to at least one radial hole.
[0018] Compared with the prior art, some of the beneficial effects of the technical solution disclosed in this utility model include:
[0019] This invention adjusts the structure of the plug by combining axial blind holes and radial holes. This prevents external impurities and moisture from entering when the relief valve is pumping gas, improving the efficiency and reliability of gas pumping and making the relief valve's operation safer and more reliable. Attached Figure Description
[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 This is a schematic diagram of the cross-sectional structure of an existing shrink plug.
[0022] Figure 2 This is a schematic diagram of the structure of the shrink plug and the shrink plug hole in this utility model.
[0023] Figure 3 This is a cross-sectional view of the shrink plug in this utility model.
[0024] Figure 4 This is a cross-sectional view of the structure of the present invention with multiple axial blind holes.
[0025] In the above attached figures, the meanings of each label are as follows:
[0026] 1. Shrinking plug device; 101. Shrinking plug head; 102. Axial blind hole; 103. Radial hole; 104. Boss; 105. Twisting groove. Detailed Implementation
[0027] The following description, in conjunction with the accompanying drawings and specific embodiments, further illustrates this embodiment.
[0028] In view of the many defects in the existing relief valve structure, such as the easy entry of impurities and water into the relief valve causing damage and affecting its service life, the following embodiments are optimized to overcome the defects of the existing technology.
[0029] Example
[0030] like Figures 2-4 As shown, this embodiment provides a radial waterproof sealing device 1 for railway freight cars, including a sealing head 101 that cooperates with a sealing hole. The inner end of the sealing head 101 enters the sealing hole while the outer end is located outside the sealing hole. An axial blind hole 102 is formed from the inner end of the sealing hole toward the outer end of the sealing hole. A radial hole 103 is formed from the side surface of the main body of the sealing head 101, communicating with the axial blind hole 102. When a pressure difference is formed between the relief valve and the external environment, gas flows through the radial hole 103 and the axial blind hole 102 to maintain the gas pressure balance inside and outside the relief valve.
[0031] In practical applications, the plugging device 1 also includes a plugging block and other structures that are connected and cooperate with the plugging head 101. The plugging block is located inside the plugging hole and cooperates with the inner end of the plugging head 101.
[0032] The waterproof sealing device 1 disclosed in this embodiment, through the combination of an axial blind hole 102 and a radial hole 103, enables the relief valve to extract gas, helping to maintain the internal and external air pressure balance of the relief valve. Because the axial blind hole 102 and the radial hole 103 effectively prevent external dust, impurities, and water from entering the relief valve, it helps maintain a stable and reliable environment inside the relief valve, facilitating better operation of the relief valve.
[0033] The radial holes 103 are used to connect the external environment with the axial blind holes 102. Their number and arrangement can be varied; this embodiment optimizes and adopts one feasible option: the radial holes 103 connect to the inner port of the axial blind holes 102. When the above scheme is adopted, the radial holes 103 are perpendicular to the axial blind holes 102.
[0034] When the number of radial holes 103 is greater than one, different included angles can be set between the radial holes 103. Different included angles can affect the rate of air extraction and degassing. This embodiment optimizes and adopts one feasible option: the number of radial holes 103 is at least two, and the radial holes 103 are arranged opposite each other to form a through hole. When adopting the above scheme, the number of radial holes 103 can be set to two, and they are aligned with the through-hole plug 101.
[0035] When the plug 101 is positioned at the plugging hole, it is typically connected via a threaded connection. However, impurities can easily accumulate at the threads and enter the radial hole 103, affecting the safe operation of the relief valve. This embodiment optimizes the process by employing a feasible alternative: a threaded connection section is formed on the plug 101, which mates with the plugging hole, and a gap is created between the radial hole 103 and the threaded connection section. Using this solution, the gap between the radial hole 103 and the threaded connection section prevents impurities and water from entering the radial hole 103, thus facilitating a stable and reliable environment within the relief valve.
[0036] In some solutions, to prevent external dust, impurities, and water from entering through the radial hole 103, this embodiment optimizes and adopts one feasible option: a radial boss 104 is formed at the outer end of the main body of the plug 101. When the above solution is adopted, the radial boss 104 can block external dust and impurities from entering, maintaining a safe and reliable environment within the radial hole 103.
[0037] The radial boss 104 can be constructed in various forms and is not limited to a single one. This embodiment optimizes and adopts one feasible option: the radial boss 104 extends continuously along the side surface of the plug 101 to form a convex ring structure. When the above scheme is adopted, the radial boss 104 and the plug 101 are integrally formed.
[0038] To facilitate the installation and removal of the shrink plug 101, this embodiment is optimized and adopts one feasible option: the outer end of the shrink plug 101 is also formed with a screw groove 105. When adopting the above solution, the screw groove 105 can be a straight groove or a cross groove.
[0039] To further prevent external impurities from entering the relief valve and to achieve impurity blocking, this embodiment optimizes and adopts one feasible option: the diameter of the axial blind hole 102 gradually increases as it extends from the inner end to the outer end of the plug 101. With this scheme, the diameter of the axial blind hole 102 is a variable value. When external gas enters the axial blind hole 102, the diameter it passes through decreases as the gas is transported. When external impurities enter, the decreasing diameter blocks the impurities, preventing them from entering the relief valve. When gas is released from the relief valve, the diameter it passes through increases as the gas is transported, resulting in smoother gas delivery.
[0040] The radial hole 103 and the axial hole use the same adjustment settings. This embodiment optimizes this by adopting one feasible option: the diameter of the radial hole 103 gradually decreases as it extends inward from the side surface of the plug 101, and the minimum diameter of the radial hole 103 is equal to the maximum diameter of the axial blind hole 102. With this scheme, the radial hole 103 communicates with the axial blind hole 102, allowing for smooth transitions in diameter, ensuring smooth gas delivery, and simultaneously guaranteeing the blocking performance against external impurities.
[0041] When there is a demand for increased exhaust volume, the exhaust volume can be increased by improving the arrangement of the radial holes 103. This embodiment optimizes and adopts one feasible option: the radial holes 103 are evenly spaced along the circumference on the side surface of the plug head 101. When the above solution is adopted, the more radial holes 103 there are, the higher the efficiency of exhaust and the stronger the ability to cope with impurity blockage.
[0042] The number of axial blind holes 102 also affects the gas flow rate of the relief valve. This embodiment optimizes the process and adopts one feasible option: the number of axial blind holes 102 is several, and they are distributed in multiple layers circumferentially on the inner end of the plug 101. The diameter of the inner layer axial blind holes 102 is larger than the diameter of the outer layer axial blind holes 102. When the above scheme is adopted, the axial blind holes 102 include a central axial blind hole 102 and several outer layer axial blind holes 102, and each axial blind hole 102 corresponds to at least one radial hole 103.
[0043] The above are the embodiments listed in this example; however, this example is not limited to the optional embodiments described above; those skilled in the art can arbitrarily combine the above methods to obtain other various embodiments; anyone can derive other various forms of embodiments under the guidance of this example. The above specific embodiments should not be construed as limiting the scope of protection of this example; the scope of protection of this example should be determined by the claims.
Claims
1. A radial waterproof sealing device for railway freight cars, characterized in that: The device includes a plug head (101) that mates with a plug orifice. The inner end of the plug head (101) enters the plug orifice while the outer end is located outside the plug orifice. An axial blind hole (102) is formed from the inner end of the plug orifice and extends toward the outer end of the plug orifice. A radial hole (103) is formed from the side surface of the main body of the plug head (101) that communicates with the axial blind hole (102). When a pressure difference is formed between the relief valve and the external environment, gas flows through the radial hole (103) and the axial blind hole (102) to maintain the gas pressure balance inside and outside the relief valve.
2. The radial waterproof sealing device for railway freight cars according to claim 1, characterized in that: The radial hole (103) connects to the inner port of the axial blind hole (102).
3. The radial waterproof sealing device for railway freight cars according to claim 2, characterized in that: The number of radial holes (103) is at least two, and the radial holes (103) arranged opposite each other form a through hole.
4. The radial waterproof sealing device for railway freight cars according to claim 1, 2, or 3, characterized in that: The outer end of the main body of the plug (101) forms a radial boss (104), and the radial boss (104) extends continuously along the side surface of the plug (101) to form a convex ring structure.
5. The radial waterproof sealing device for railway freight cars according to claim 1, characterized in that: A threaded connection section is formed on the plug (101), and the radial hole (103) is spaced from the threaded connection section.
6. The radial waterproof sealing device for railway freight cars according to claim 1, characterized in that: The outer end of the plug (101) is also formed with a screwing groove (105).
7. The radial waterproof sealing device for railway freight cars according to claim 1, characterized in that: The diameter of the axial blind hole (102) gradually increases as it extends from the inner end to the outer end of the plug (101).
8. The radial waterproof sealing device for railway freight cars according to claim 7, characterized in that: The diameter of the radial hole (103) gradually decreases as it extends from the side surface of the plug (101) inward. The minimum diameter of the radial hole (103) is equal to the maximum diameter of the axial blind hole (102).
9. The radial waterproof sealing device for railway freight cars according to claim 1, characterized in that: The radial holes (103) are evenly spaced along the circumference on the side surface of the plug (101).
10. The radial waterproof sealing device for railway freight cars according to claim 1, characterized in that: The number of axial blind holes (102) is several, and they are distributed in multiple layers on the inner end of the shrink plug (101). The diameter of the inner layer axial blind hole (102) is larger than the diameter of the outer layer axial blind hole (102).