Anti-overcharging device for air distribution valve of railway locomotive

Abstract

The utility model discloses an anti-overcharge device for an air distribution valve of a railway locomotive, which comprises an anti-overcharge valve body I, an anti-overcharge valve cover is arranged on the anti-overcharge valve body I, a cavity is arranged in the anti-overcharge valve cover, a middle body is arranged in the anti-overcharge valve body I, and an anti-overcharge valve cover is arranged in the middle body. A first train pipe passage, a second train pipe passage and a third train pipe passage are arranged in the first overcharge prevention valve body, and an overcharge prevention assembly is arranged in the first overcharge prevention valve body. Compared with the prior art, the anti-overcharge valve body I and the anti-overcharge assembly are arranged, so that the anti-overcharge valve body I is arranged between a distribution valve and an external locomotive pipeline interface, and the purpose of cutting off and opening a passage between a locomotive train pipe and a distribution valve train pipe is achieved by controlling the lifting of an anti-overcharge piston and a valve rod in the anti-overcharge assembly; therefore, the influence of the abnormal pressure change of the locomotive train pipe on the work of the distribution valve is solved, the safety of the distribution valve is improved, and the practicability and convenience of the device are effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of locomotive air distribution valve technology, and in particular to an overcharge prevention device for railway locomotive air distribution valve. Background Technology

[0002] When Chinese locomotives equipped with Chinese-made air distribution valves are coupled with locomotives from Eurasian Economic Union (EAEU) countries, abnormal situations frequently occur due to the different train pipe pressure variations between EEA EU locomotives and Chinese locomotives. These abnormal situations include a rapid rise in train pipe pressure exceeding the specified pressure, followed by a rapid drop, exceeding the rated operating conditions of the Chinese locomotive's air distribution valve. This rapid drop in train pipe pressure can cause abnormal braking of the Chinese locomotive's air distribution valve. This problem urgently needs to be solved; otherwise, it will be inconvenient for locomotives exported from my country to Eurasian Economic Union countries to be coupled with locomotives from those countries. Therefore, it is necessary to design an overcharge protection device for railway locomotive air distribution valves that will not affect the abnormal braking of the distribution valve when abnormalities occur in the train pipe of external locomotives, thus ensuring the stability of the distribution valve's operation. This is to solve the abnormal braking phenomenon that occurs when Chinese locomotives are coupled with locomotives from these countries when exported to Eurasian Economic Union countries. Utility Model Content

[0003] In order to overcome the abnormal situation in the existing technology where the external locomotive train pipe pressure rises rapidly to exceed the specified pressure and then drops rapidly during locomotive coupling, which exceeds the rated operating conditions of the locomotive air distribution valve, and the rapid drop of the train pipe will cause abnormal braking of the locomotive air distribution valve, one of the purposes of this utility model is to provide an overcharge prevention device for railway locomotive air distribution valve.

[0004] One of the objectives of this utility model is achieved through the following technical solution: an overcharge prevention device for a railway locomotive air distribution valve, comprising an overcharge prevention valve body 1; an overcharge prevention valve cover is provided on the overcharge prevention valve body 1, a chamber is provided inside the overcharge prevention valve cover, an intermediate body is provided inside the overcharge prevention valve body 1, and train pipe passage 1, train pipe passage 2, and train pipe passage 3 are provided inside the overcharge prevention valve body 1; an overcharge prevention component is provided inside the overcharge prevention valve body 1; the overcharge prevention component consists of an overcharge prevention strut movably connected to the inner wall of the chamber, a valve stem installed on the inner wall of the overcharge prevention strut, an annular sealing ring located on the outer surface of the valve stem, a valve sleeve located on the outer surface of the valve stem, a compression spring located above the overcharge prevention strut, a spring support, and a pressure adjusting screw. The overcharge prevention component facilitates the opening and cutting off of the passage between the distribution valve train pipe and the locomotive train pipe, thereby improving the safety of the distribution valve.

[0005] According to the aforementioned overcharge prevention device for the air distribution valve of a railway locomotive, the first and second train pipe passages are connected to the external locomotive train pipe, and the third train pipe passage is connected to the external distribution valve train pipe. This facilitates connection and control.

[0006] According to the aforementioned overcharge prevention device for an air distribution valve in a railway locomotive, the spring support is inverted convex in shape, with a protrusion in the center of its upper surface. The inner diameter of the compression spring is matched with the inner diameter of the spring support, and the compression spring is movably connected to the spring support. The spring support guides and supports the compression spring.

[0007] According to the aforementioned overcharge prevention device for an air distribution valve in a railway locomotive, the overcharge prevention strut is a hollow annular shape, and a threaded mounting portion is fixedly connected to the upper surface of the overcharge prevention strut. One end of the valve stem is threaded to the inner wall of the threaded mounting portion, and the overcharge prevention strut and the valve stem are detachable. This facilitates the installation of the valve stem in the overcharge prevention strut so that both can move simultaneously.

[0008] According to the aforementioned overcharge prevention device for an air distribution valve in a railway locomotive, the outer surface of the intermediate body is provided with a channel, enabling pressure transmission.

[0009] According to the aforementioned overcharge prevention device for an air distribution valve in a railway locomotive, the thickness of the annular sealing ring is greater than the height of the channel. The annular sealing ring can seal the channel, thereby cutting off the passage.

[0010] According to the aforementioned overcharge prevention device for an air distribution valve in a railway locomotive, the size of the valve stem is adapted to the size of the inner wall of the valve sleeve, and the valve stem is slidably connected to the inner wall of the valve sleeve. The valve sleeve supports the valve stem, preventing the valve stem from shifting its position during vertical movement, thereby the valve sleeve serves a guiding function.

[0011] According to the aforementioned overcharge prevention device for an air distribution valve in a railway locomotive, an abutment portion is provided on the upper surface of the overcharge prevention lever. One end of the compression spring abuts against the inner bottom wall of the abutment portion, and the compression spring is movably connected within the cavity. When the overcharge prevention lever moves up and down through the abutment portion, the compression spring deforms.

[0012] According to the aforementioned overcharge prevention device for an air distribution valve in a railway locomotive, a through hole is provided in the center of the upper surface of the overcharge prevention valve cover. An adjusting component is fixedly connected to the upper surface of the overcharge prevention valve cover. A pressure adjusting screw is threadedly connected to the adjusting component, passing through the through hole and the adjusting component and abutting against the protrusion. The overcharge prevention valve body and the overcharge prevention valve cover are connected by bolts. This facilitates the installation of the overcharge prevention valve cover and the overcharge prevention valve body, achieving convenient installation and disassembly, and also facilitates the adjustment of specified pressures, thus improving the applicability of the device.

[0013] According to the aforementioned anti-overcharge device for a railway locomotive air distribution valve, it further includes an anti-overcharge valve body two. The anti-overcharge valve body two has an internal working air cylinder passage one and a working air cylinder passage two, which are respectively connected to an external locomotive working air cylinder connecting pipe and an external distribution valve working air cylinder connecting pipe. This facilitates the cutting off of the passage between the locomotive and the distribution valve via the working air cylinder, improving the practicality of the device.

[0014] The above-mentioned solution has the following beneficial effects:

[0015] 1. By setting up the overcharge protection valve body and the overcharge protection assembly, compared with the existing technology, the overcharge protection valve body is installed between the distribution valve and the external locomotive pipeline interface. By controlling the raising and lowering of the overcharge protection lever and valve stem in the overcharge protection assembly, the passage between the locomotive train pipe and the distribution valve train pipe is cut off and opened. This solves the problem of abnormal pressure changes in the locomotive train pipe affecting the operation of the distribution valve, thereby improving the safety of the distribution valve and effectively improving the practicality and convenience of the device.

[0016] 2. By setting up the pressure adjusting screw, through hole and adjusting component, when pressure needs to be adjusted, the pressure adjusting screw is rotated to move it up and down a certain distance on the inner wall of the adjusting component and through hole, so that the compression spring rebounds upward or is compressed downward a certain distance, thereby achieving the purpose of adjusting the working pressure of the device, realizing the need to adjust the specified pressure, and effectively improving the applicability of the device.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0019] Figure 1 This is a schematic diagram of the overall structure of an anti-overcharge device for an air distribution valve in a railway locomotive according to the present invention;

[0020] Figure 2This is a top view schematic diagram of the overall structure of the anti-overcharge device for the air distribution valve of a railway locomotive according to the present invention;

[0021] Figure 3 This is a schematic diagram of the chamber structure of an anti-overcharge device for an air distribution valve in a railway locomotive according to the present invention;

[0022] Figure 4 This utility model relates to an overcharge prevention device for an air distribution valve in a railway locomotive. Figure 3 Enlarged structural diagram at point A;

[0023] Figure 5 This is a schematic diagram of the spring support of the anti-overcharge device for the air distribution valve of a railway locomotive according to the present invention;

[0024] Figure 6 This is a schematic diagram of the overcharge prevention component of an anti-overcharge device for an air distribution valve in a railway locomotive according to the present invention;

[0025] Figure 7 This is a schematic diagram of the second train pipe passage of the anti-overcharge device for the air distribution valve of a railway locomotive according to the present invention;

[0026] Figure 8 This is a schematic diagram of the overcharge prevention valve body of the overcharge prevention device for the air distribution valve of a railway locomotive according to the present invention.

[0027] Legend:

[0028] 1. Overcharge protection valve body one; 2. Overcharge protection valve cover; 3. Chamber; 4. Intermediate body; 5. Train pipe passage one; 6. Train pipe passage two; 7. Overcharge protection assembly; 71. Overcharge protection lever; 72. Valve stem; 73. Annular sealing ring; 74. Valve sleeve; 75. Compression spring; 76. Spring support; 77. Pressure adjusting screw; 8. Train pipe passage three; 9. Protrusion; 10. Threaded mounting part; 11. Channel; 12. Abutment part; 13. Through hole; 14. Adjusting component; 15. Overcharge protection valve body two; 16. Working air cylinder passage one; 17. Working air cylinder passage two. Detailed Implementation

[0029] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0030] Example 1

[0031] Reference Figures 1-7An overcharge prevention device for an air distribution valve in a railway locomotive includes an overcharge prevention valve body 1. The overcharge prevention valve body 1 has an overcharge prevention valve cover 2, a chamber 3 inside the cover 2, an intermediate body 4 inside the body 1, and train pipe passages 5, 6, and 8 inside the body 1. An overcharge prevention assembly 7 is also provided inside the body 1. The assembly 7 consists of an overcharge prevention strut 71 movably connected to the inner wall of the chamber 3, a valve stem 72 installed on the inner wall of the strut 71, an annular sealing ring 73 on the outer surface of the valve stem 72, a valve sleeve 74 on the outer surface of the valve stem 72, a compression spring 75 above the strut 71, a spring support 76, and a pressure adjusting screw 77.

[0032] In this embodiment, the overcharge protection component 7 can cut off and open the passage between the locomotive train pipe and the distribution valve train pipe by raising and lowering the overcharge protection lever 71 and the valve stem 72. This avoids the distribution valve from being affected when the pressure of the external train pipe is abnormal, thereby solving the problem of the distribution valve's operation caused by abnormal pressure changes in the external locomotive train pipe, thus improving the safety of the distribution valve and effectively enhancing the practicality and convenience of the device.

[0033] Specifically, train pipe passage 1 5 and train pipe passage 2 6 are connected to the external locomotive train pipe, and train pipe passage 3 8 is connected to the external distribution valve train pipe.

[0034] In this embodiment, the external locomotive train pipe is installed in train pipe passage 1 5, and the external distribution valve train pipe is installed in train pipe passage 3 8, thereby achieving the purpose of opening and closing the passage between the distribution valve and the locomotive through pressure control.

[0035] Specifically, the spring support 76 is inverted convex, and a protrusion 9 is provided in the middle of the upper surface of the spring support 76. The inner diameter of the compression spring 75 is adapted to the inner diameter of the spring support 76, and the compression spring 75 and the spring support 76 are movably connected.

[0036] In this embodiment, the spring support 76 can guide and support the compression spring 75, so that the pressure adjusting screw 77 can deform the compression spring 75 through the spring support 76.

[0037] Specifically, the overcharge protection lever 71 is a hollow ring, and a threaded mounting part 10 is fixedly connected to the upper surface of the overcharge protection lever 71. One end of the valve stem 72 is threaded to the inner wall of the threaded mounting part 10, and the overcharge protection lever 71 and the valve stem 72 are detachable.

[0038] In this embodiment, it is convenient to install the valve stem 72 in the overcharge protection brace 71 so that both can move simultaneously.

[0039] Specifically, a channel 11 is provided on the outer surface of the intermediate body 4, and the thickness of the annular sealing ring 73 is greater than the height of the channel 11.

[0040] In this embodiment, the annular sealing ring 73 can close the channel 11, thereby cutting off the passage between the external locomotive train pipe and the distribution valve train pipe, so that the distribution valve can remain stable and not be affected by the pressure of the external locomotive train pipe.

[0041] Specifically, the size of the valve stem 72 is adapted to the size of the inner wall of the valve sleeve 74, and the valve stem 72 is slidably connected to the inner wall of the valve sleeve 74.

[0042] In this embodiment, the valve stem 72 can slide on the inner wall of the valve sleeve 74, and the valve sleeve 74 supports the valve stem 72 to prevent the valve stem 72 from shifting its position when moving up and down, thereby the valve sleeve 74 plays a guiding role.

[0043] Specifically, the upper surface of the overcharge protection lever 71 is provided with an abutment portion 12, one end of the compression spring 75 abuts against the inner bottom wall of the abutment portion 12, and the compression spring 75 is movably connected in the chamber 3.

[0044] In this embodiment, when the overcharge protection strut 71 moves up and down, the abutment part 12 causes the compression spring 75 to deform. When the overcharge protection strut 71 moves upward, the abutment part 12 will press the compression spring 75 upward to deform it. When the overcharge protection strut 71 moves downward, the compression spring 75 will rebound downward and deform. The other end of the compression spring 75 is abutted by the spring support 76, and the position of the spring support 76 is abutted by the pressure adjusting screw 77. Thus, the position where the compression spring 75 deforms is between the overcharge protection strut 71 and the pressure adjusting screw 77.

[0045] Specifically, an overcharge protection valve cover 2 has a through hole 13 in the middle of its upper surface. An adjusting member 14 is fixedly connected to the upper surface of the overcharge protection valve cover 2. A pressure adjusting screw 77 is threadedly connected to the adjusting member 14. The pressure adjusting screw 77 passes through the through hole 13 and the adjusting member 14 and abuts against the protrusion 9. The overcharge protection valve body 1 and the overcharge protection valve cover 2 are connected by bolts.

[0046] In this embodiment, when pressure adjustment is required, rotating the pressure adjusting screw 77 in the forward direction causes it to move upward a certain distance on the inner wall of the adjusting member 14 and the inner wall of the through hole 13. Conversely, rotating the pressure adjusting screw 77 in the reverse direction causes it to move downward a certain distance on the inner wall of the adjusting member 14 and the inner wall of the through hole 13, thereby compressing the spring 75 and causing it to deform (the spring 75 rebounds upward or compresses downward a certain distance), thus achieving the purpose of adjusting the working pressure of the device. The adjustment is convenient, thereby fulfilling the requirement of adjusting the specified pressure, improving the applicability of the device, and facilitating the installation of the overcharge protection valve cover 2 and the overcharge protection valve body 1, achieving the purpose of convenient installation and disassembly.

[0047] Working principle: The overcharge prevention valve body 1 is installed at the interface between the distribution valve and the external locomotive pipeline. The external locomotive train pipe and the external distribution valve train pipe are connected to train pipe passage 1 5 and train pipe passage 3 8, respectively. Train pipe passage 1 5 and train pipe passage 2 6 divide the pressure of the external locomotive train pipe in two, so that part of the pressure of the external locomotive train pipe is led to the underside of the overcharge prevention valve 71 through train pipe passage 1 5, and part of the pressure is introduced into the valve stem 72 through the channel 11 opened in the intermediate body 4. Thus, the flow between the locomotive and the distribution valve is realized through train pipe passage 2 6 and train pipe passage 3 8. When it is necessary to cut off the passage between the distribution valve train pipe and the locomotive train pipe by using the train pipe passage connection method, when the pressure of the external locomotive train pipe reaches the set pressure... When pressure is applied, it is transmitted to the overcharge protection strut 71 through the train pipe passage 15. The pressure pushes the overcharge protection strut 71 and valve stem 72 upward, compressing the compression spring 75. When the valve stem 72 moves upward, it closes the channel 11 on one side of the train pipe passage 26 through multiple annular sealing rings 73 on its outside, thereby cutting off the passage between the locomotive train pipe connected to the train pipe passage 26 and the distribution valve train pipe connected to the train pipe passage 38. When the pressure of the external train pipe in the train pipe passage 15 is lower than the set pressure, the compression spring 75 rebounds and drives the overcharge protection strut 71 and valve stem 72 to descend, thereby opening the passage 11 between the locomotive train pipe and the distribution valve train pipe. The distribution valve resumes normal operation, thus effectively improving the safety of the distribution valve.

[0048] Example 2

[0049] like Figure 8 As shown, the distinguishing feature of this embodiment from that of embodiment 1 is that it also includes an overcharge protection valve body 2 15. The overcharge protection valve body 2 15 has a working air cylinder passage 16 and a working air cylinder passage 2 17 inside. The working air cylinder passage 16 and the working air cylinder passage 2 17 are respectively connected to the external locomotive working air cylinder connecting pipe and the external distribution valve working air cylinder connecting pipe.

[0050] In practical use, the entire overcharge protection device is identical in structure and working principle, except for the different internal passage designs of overcharge protection valve body 2 (15) and overcharge protection valve body 1 (1). Overcharge protection valve body 2 (15) provides an alternative method for switching on and off between the locomotive and the distribution valve: using a working air cylinder. When it is necessary to cut off the passage between the distribution valve and the locomotive using the working air cylinder passage, the external locomotive train pipe is installed in train pipe passage 1 (5). The locomotive working air cylinder connecting pipe and the distribution valve working air cylinder connecting pipe are respectively connected to working air cylinder passage 1 (16) and working air cylinder passage 2 (17). Thus, the flow between the locomotive and the distribution valve is achieved through working air cylinder passage 1 (16), working air cylinder passage 2 (17), and passage 11. When the external locomotive train... When the pipe pressure reaches the set pressure, the pressure is transmitted through the train pipe passage 5, and the pressure pushes the overcharge protection strut 71 and valve stem 72 upward, squeezing the compression spring 75. When the valve stem 72 moves upward, it closes the channel 11 on one side of the working air cylinder passage 16 through multiple annular sealing rings 73, thereby cutting off the passage between the locomotive and the distribution valve. When the pressure of the external locomotive train pipe in the train pipe passage 5 is lower than the set pressure, the compression spring 75 rebounds and drives the overcharge protection strut 71 and valve stem 72 downward, thereby opening the channel 11 and restoring the distribution valve to normal operation. This effectively improves the safety of the distribution valve, and different cut-off methods can be selected according to actual needs, effectively improving the practicality and applicability of the device.

[0051] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A device for preventing overcharging of an air distribution valve in a railway locomotive, characterized in that, The system includes an overcharge protection valve body (1): an overcharge protection valve cover (2) is provided on the overcharge protection valve body (1), a chamber (3) is provided inside the overcharge protection valve cover (2), an intermediate body (4) is provided inside the overcharge protection valve body (1), a train pipe passage one (5), a train pipe passage two (6) and a train pipe passage three (8) are provided inside the overcharge protection valve body (1), and an overcharge protection component (7) is provided inside the overcharge protection valve body (1). The overcharge protection assembly (7) consists of an overcharge protection strut (71) movably connected to the inner wall of the chamber (3), a valve stem (72) installed on the inner wall of the overcharge protection strut (71), an annular sealing ring (73) located on the outer surface of the valve stem (72), a valve sleeve (74) located on the outer surface of the valve stem (72), a compression spring (75) located above the overcharge protection strut (71), a spring support (76), and a pressure adjusting screw (77).

2. The overcharge prevention device for the air distribution valve of a railway locomotive according to claim 1, characterized in that, Train pipe passage one and train pipe passage two (15) are connected to the external locomotive train pipe, and train pipe passage three (8) is connected to the external distribution valve train pipe.

3. The overcharge prevention device for the air distribution valve of a railway locomotive according to claim 1, characterized in that, The spring support (76) is inverted convex, and a protrusion (9) is provided in the middle of the upper surface of the spring support (76). The inner diameter of the compression spring (75) is adapted to the inner diameter of the spring support (76), and the compression spring (75) is movably connected to the spring support (76).

4. The overcharge prevention device for the air distribution valve of a railway locomotive according to claim 1, characterized in that, The overcharge protection strut (71) is a hollow ring. A threaded mounting part (10) is fixedly connected to the upper surface of the overcharge protection strut (71). One end of the valve stem (72) is threaded to the inner wall of the threaded mounting part (10). The overcharge protection strut (71) and the valve stem (72) are detachable.

5. The overcharge prevention device for the air distribution valve of a railway locomotive according to claim 1, characterized in that, The outer surface of the intermediate (4) is provided with a channel (11).

6. The overcharge prevention device for the air distribution valve of a railway locomotive according to claim 1, characterized in that, The thickness of the annular sealing ring (73) is greater than the height of the channel (11).

7. The overcharge prevention device for the air distribution valve of a railway locomotive according to claim 1, characterized in that, The size of the valve stem (72) is adapted to the size of the inner wall of the valve sleeve (74), and the valve stem (72) is slidably connected to the inner wall of the valve sleeve (74).

8. The overcharge prevention device for the air distribution valve of a railway locomotive according to claim 1, characterized in that, The upper surface of the overcharge protection caliper (71) is provided with an abutment part (12), one end of the compression spring (75) abuts against the inner bottom wall of the abutment part (12), and the compression spring (75) is movably connected in the chamber (3).

9. The overcharge prevention device for the air distribution valve of a railway locomotive according to claim 1, characterized in that, The overcharge protection valve cover (2) has a through hole (13) in the middle of its upper surface. An adjusting member (14) is fixedly connected to the upper surface of the overcharge protection valve cover (2). The pressure adjusting screw (77) is threadedly connected to the adjusting member (14). The pressure adjusting screw (77) passes through the through hole (13) and the adjusting member (14) and abuts against the protrusion (9). The overcharge protection valve body (1) and the overcharge protection valve cover (2) are connected by bolts.

10. The overcharge prevention device for the air distribution valve of a railway locomotive according to claim 1, characterized in that, The system also includes an overcharge prevention valve body two (15), which has a working air cylinder passage one (16) and a working air cylinder passage two (17) inside. The working air cylinder passage one (16) and the working air cylinder passage two (17) are respectively connected to the external locomotive working air cylinder connecting pipe and the external distribution valve working air cylinder connecting pipe.

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