Sealing rings and sealing devices for railway freight car brake systems

Abstract

This utility model discloses a sealing ring and sealing device for a railway freight car brake piping system. The sealing ring includes a sealing ring body, a first main lip, a second main lip, and an annular boss. The first main lip is annular, and its root is fixed to the inner surface of the sealing ring body. The second main lip is also annular, and its root is fixed to the inner surface of the sealing ring body. The sealing ring body, the first main lip, and the second main lip form a sealing ring groove. The annular boss is disposed within the sealing ring groove, and its root is fixed to the inner surface of the sealing ring body. The annular boss forms a first lip groove and a second lip groove with the first and second main lip, respectively. An inflation groove is provided on the upper surface of the annular boss. This sealing ring can improve the sealing performance of railway freight car brake piping connections.

Description

Technical Field

[0001] This utility model relates to a sealing ring and sealing device for a railway freight car brake pipe system. Background Technology

[0002] The braking system is one of the most important systems in railway freight cars, ensuring the safety of vehicles and personnel. The braking system consists of multiple steel pipes, which are connected by sealing devices to ensure a tight seal between adjacent pipes. Sealing rings improve the sealing of these connections; however, in existing technology, the main lip of the sealing ring is easily flattened, meaning the lip groove is compressed into a closed position. This prevents air from entering the lip groove during braking, thus preventing the main lip from opening and rendering the sealing ring ineffective. This leads to leaks at the connection points during braking, reducing braking performance, increasing maintenance frequency, posing significant safety hazards, and impacting the operational safety of the vehicle. Utility Model Content

[0003] In view of this, one object of the present invention is to provide a sealing ring for a railway freight car brake piping system, which can improve the sealing performance of the railway freight car brake piping system connection. Another object of the present invention is to provide a sealing device for a railway freight car brake piping system.

[0004] The present invention achieves the above objectives by adopting the following technical solution.

[0005] On the one hand, this utility model provides a sealing ring for a railway freight car brake piping system, including a sealing ring body, a first main lip, a second main lip, and an annular boss;

[0006] The first main lip is annular, and the root of the first main lip is fixed to the inner surface of the sealing ring body;

[0007] The second main lip is annular, and the root of the second main lip is fixed to the inner surface of the sealing ring body;

[0008] The sealing ring body, the first main lip, and the second main lip form a sealing ring groove;

[0009] The annular boss is disposed in the groove of the sealing ring, and the root of the annular boss is fixed to the inner surface of the sealing ring body; the annular boss forms a first lip groove and a second lip groove with the first main lip and the second main lip respectively.

[0010] An inflation groove is provided on the upper surface of the annular boss.

[0011] The sealing ring body of this utility model is annular.

[0012] The first and second main lip plates are respectively located at the two ends of the sealing ring body along the axial direction.

[0013] According to the sealing ring of this utility model, preferably, the inflation groove is arranged along the axial direction of the sealing ring body;

[0014] The inflatable grooves are configured in multiple ways, and the multiple inflatable grooves are evenly arranged around the sealing ring body along the axial direction.

[0015] In this way, during braking, gas can still enter the first and second lip grooves through the inflation groove, keeping the first and second main lips open. This ensures that the first and second main lips can fit tightly against the connecting seat, improving the sealing effect. It also prevents the first and second main lips from being flattened due to assembly pressure, which would prevent gas from entering the first and second lip grooves, reducing the sealing effect and thus affecting the braking performance.

[0016] According to the sealing ring of this utility model, preferably, the sealing ring further includes a first auxiliary lip, the first auxiliary lip being annular, and the root of the first auxiliary lip being fixed to the side surface of the sealing ring body.

[0017] According to the sealing ring of this utility model, preferably, the sealing ring further includes a second auxiliary lip, the second auxiliary lip being annular, and the root of the second auxiliary lip being fixed to the side surface of the sealing ring body; the first auxiliary lip and the second auxiliary lip are located on the same side of the sealing ring body and are arranged in a direction perpendicular to the axial direction of the sealing ring body.

[0018] According to the sealing ring of this utility model, preferably, the cross section S1 obtained by the first lip piece being cut by the plane passing through the axis of the sealing ring body is a right triangle, and one of the right-angled sides of the cross section S1 is fixed to the side surface of the sealing ring body.

[0019] The length of the first lip piece along the axial direction of the sealing ring body is 0.25 to 0.4 mm;

[0020] The second lip piece has a cross section S2 obtained by the plane passing through the axis of the sealing ring body. It is a right triangle, and one of the right-angled sides of the cross section S2 is fixed to the side surface of the sealing ring body.

[0021] The length of the second lip piece along the axial direction of the sealing ring body is 0.25 to 0.4 mm.

[0022] The secondary lip allows for a closer fit between two adjacent connectors, thereby improving the sealing effect.

[0023] According to the sealing ring of this utility model, preferably, the first main lip includes a first root and a first lip; the bottom of the first root is fixed to the inner surface of the sealing ring body, and the top of the first root is connected to the bottom of the first lip; the cross-section of the first lip obtained by the plane passing through the axis of the sealing ring body is trapezoidal, and the length of the bottom of the first lip along the axis of the sealing ring body is greater than the length of the top of the first lip along the axis of the sealing ring body.

[0024] The second main lip includes a second root and a second lip; the bottom of the second root is fixed to the inner surface of the sealing ring body, and the top of the second root is connected to the bottom of the second lip; the cross-section of the second lip obtained by the plane passing through the axis of the sealing ring body is trapezoidal, and the length of the bottom of the second lip along the axis of the sealing ring body is greater than the length of the top of the second lip along the axis of the sealing ring body.

[0025] According to the sealing ring of this utility model, preferably, the first root and the second root are substantially parallel; the first lip is inclined away from the annular boss, and the second lip is inclined away from the annular boss.

[0026] This increases the opening width of the lip, allowing gas to enter the first and second lip grooves during braking, thus opening the first and second main lip plates and improving the sealing effect.

[0027] On the other hand, this utility model provides a sealing device for a railway freight car brake piping system, including a sealing ring, a mounting base and a connecting base as described above;

[0028] The mounting base has a mounting through hole in the middle, and a slot is provided in the mounting through hole;

[0029] The connector includes a connecting part and a fixing part. The connecting part has a connecting part through hole, and the fixing part has a fixing part through hole. The connecting part through hole and the fixing part through hole are connected. The fixing part is located in the mounting through hole, and the connecting part extends out of the mounting through hole.

[0030] An installation cavity is formed between the fixing part and the inner wall of the mounting base, and the sealing ring is located in the installation cavity.

[0031] The slot is annular. The slot is located near the end of the mounting through hole.

[0032] The diameter of the through hole in the fixing part can be smaller than the diameter of the through hole in the connecting part.

[0033] In some embodiments, the fixing part includes a first fixing part, a second fixing part, and a third fixing part connected in sequence.

[0034] The outer diameter of the first fixing part matches the inner diameter of the slot. The first fixing part is located in the slot.

[0035] The outer diameter of the second fixing part matches the diameter of the mounting through hole. The top surface of the second fixing part can abut against the bottom surface of the slot.

[0036] The outer diameter of the third fixing part is smaller than the diameter of the mounting through hole, thereby forming a mounting cavity between the third fixing part and the inner wall of the mounting base.

[0037] According to the sealing device of this utility model, preferably, the mounting base is provided with connecting holes, and at least two connecting holes are provided, which are located on the outer periphery of the mounting through hole.

[0038] In some implementations, multiple connection holes are provided. These multiple connection holes are evenly arranged around the outer periphery of the mounting through-hole.

[0039] According to the sealing device of this utility model, preferably, the sealing ring has a first lip;

[0040] The first lip piece is exposed outside the mounting cavity.

[0041] The sealing ring of this invention, through a special structural design, prevents the first and second main lips from closing, thus improving the sealing effect. The sealing ring of this invention is provided with an annular boss, so that during braking, gas can still enter the lip groove through the inflation groove, preventing the lip groove from being forced closed and further improving the sealing effect. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the structure of a sealing ring for a railway freight car braking system according to the present invention.

[0043] Figure 2 for Figure 1 A magnified view of a portion of the sealing ring shown.

[0044] Figure 3 This is a schematic diagram of the structure of a sealing device for a railway freight car brake system according to the present invention.

[0045] Figure 4 for Figure 3 A partial structural diagram of the mounting base is shown.

[0046] The attached figures are labeled as follows:

[0047] 10-Sealing ring; 100-Sealing ring body; 211-First root; 212-First lip; 221-Second root; 222-Second lip; 230-Annular boss; 250-Inflatable groove; 241-First lip groove; 242-Second lip groove; 300-First lip piece; 400-Second lip piece; 510-Mounting through hole; 520-Slot; 530-Connecting hole; 610-Fixing part; 620-Connecting part. Detailed Implementation

[0048] The present invention will be further described below with reference to specific embodiments, but the scope of protection of the present invention is not limited thereto.

[0049] Example 1

[0050] like Figure 1 and Figure 2 As shown, the sealing ring 10 for the braking system of railway freight cars in this embodiment includes a sealing ring body 100, a first main lip, a second main lip, an annular boss 230, a first secondary lip 300 and a second secondary lip 400.

[0051] The sealing ring body 100 is annular.

[0052] The first main lip is annular. The first main lip includes a first root 211 and a first lip 212. The bottom of the first root 211 is fixed to the inner surface of the sealing ring body 100. The top of the first root 211 is connected to the bottom of the first lip 212. The cross-section of the first lip 212 obtained by a plane passing through the axis of the sealing ring body 100 is trapezoidal. The bottom and top surfaces of the first lip 212 are substantially parallel. The length of the bottom surface of the first lip 212 along the axis of the sealing ring body 100 is greater than the length of the top surface of the first lip 212 along the axis of the sealing ring body 100.

[0053] The second main lip is annular. The second main lip includes a second root portion 221 and a second lip portion 222. The bottom surface of the second root portion 221 is fixed to the inner surface of the sealing ring body 100. The top surface of the second root portion 221 is connected to the bottom surface of the second lip portion 222. The cross-section of the second lip portion 222 obtained by a plane passing through the axis of the sealing ring body 100 is trapezoidal. The bottom and top surfaces of the second lip portion 212 are substantially parallel. The length of the bottom surface of the second lip portion 222 along the axis of the sealing ring body 100 is greater than the length of the top surface of the second lip portion 222 along the axis of the sealing ring body 100.

[0054] The first main lip and the second main lip are respectively disposed at two ends of the sealing ring body 100 along the axial direction.

[0055] The sealing ring body 100, the first main lip, and the second main lip form a sealing ring groove.

[0056] An annular boss 230 is disposed in the groove of the sealing ring. The root of the annular boss 230 is fixed to the inner surface of the sealing ring body. The annular boss 230 forms a first lip groove 241 and a second lip groove 242 with the first main lip and the second main lip, respectively. An inflation groove 250 is provided on the upper surface of the annular boss 230. The inflation groove 250 is arranged along the axial direction of the sealing ring body 100. There are multiple inflation grooves 250. The multiple inflation grooves 250 are evenly arranged along the circumference of the sealing ring body 100.

[0057] The first root portion 211 and the second root portion 221 are substantially parallel. The first lip portion 212 is inclined away from the annular boss 230, thereby increasing the lip opening of the first lip groove 241. The second lip portion 222 is inclined away from the annular boss 230, thereby increasing the lip opening of the second lip groove 242.

[0058] The first lip 300 is annular. The root of the first lip 300 is fixed to the side surface of the sealing ring body 100. The cross-section S1 of the first lip 300, obtained by a plane passing through the axis of the sealing ring body 100, is a right-angled triangle. One right-angled side of cross-section S1 is fixed to the side surface of the sealing ring body 100. The length of the first lip 300 along the axial direction of the sealing ring body 100 is 0.25–0.4 mm.

[0059] The second lip 400 is annular. The root of the second lip 400 is fixed to the side surface of the sealing ring body 100. The first lip 300 and the second lip 400 are located on the same side of the sealing ring body 100. The first lip 300 and the second lip 400 are arranged in a direction perpendicular to the axial direction of the sealing ring body 100. The cross-section S2 of the second lip 400, obtained by a plane passing through the axis of the sealing ring body 100, is a right-angled triangle. One right-angled side of cross-section S2 is fixed to the side surface of the sealing ring body 100. The length of the second lip 400 along the axial direction of the sealing ring body 100 is 0.25–0.4 mm.

[0060] Example 2

[0061] like Figure 3 As shown, the sealing device for the braking system of railway freight cars in this embodiment includes the sealing ring 10, mounting base and connecting base of embodiment 1.

[0062] like Figure 4 As shown, a mounting through hole 510 is provided in the middle of the mounting base. A retaining groove 520 is provided within the mounting through hole 510. The retaining groove 520 is annular. The retaining groove 520 is located near the end of the mounting through hole 510.

[0063] The mounting base is provided with connection holes 530. There are multiple connection holes 530. The multiple connection holes 530 are evenly arranged around the outer periphery of the mounting through hole 510.

[0064] like Figure 3 As shown, the connector includes a connecting portion 620 and a fixing portion 610. The connecting portion 620 has a connecting through hole. The fixing portion 610 has a fixing through hole. The fixing through holes communicate with the connecting through holes. The diameter of the fixing through holes is smaller than the diameter of the connecting through holes. The fixing portion 610 is located within the mounting through hole 510. The connecting portion 620 extends out of the mounting through hole 510.

[0065] The fixing part 610 includes a first fixing part, a second fixing part, and a third fixing part connected in sequence. The outer diameter of the first fixing part matches the inner diameter of the slot 520. The first fixing part is located in the slot 520. The outer diameter of the second fixing part matches the diameter of the mounting through hole 510. The top surface of the second fixing part can abut against the bottom surface of the slot 520. The outer diameter of the third fixing part is smaller than the diameter of the mounting through hole 510, thereby forming a mounting cavity between the third fixing part and the inner wall of the mounting base.

[0066] The sealing ring 10 is located in the mounting cavity. The first lip 300 and the second lip 400 are exposed outside the mounting cavity.

[0067] This utility model is not limited to the above-described embodiments. Any modifications, improvements, or substitutions that can be conceived by those skilled in the art without departing from the essential content of this utility model fall within the scope of this utility model.

Claims

1. A sealing ring for a railway freight car brake piping system, characterized in that, The sealing ring includes a sealing ring body, a first main lip, a second main lip, and an annular boss; The first main lip is annular, and the root of the first main lip is fixed to the inner surface of the sealing ring body; The second main lip is annular, and the root of the second main lip is fixed to the inner surface of the sealing ring body; The sealing ring body, the first main lip, and the second main lip form a sealing ring groove; The annular boss is disposed in the groove of the sealing ring, and the root of the annular boss is fixed to the inner surface of the sealing ring body; the annular boss forms a first lip groove and a second lip groove with the first main lip and the second main lip respectively. An inflation groove is provided on the upper surface of the annular boss.

2. The seal ring of claim 1, wherein The inflation groove is arranged along the axial direction of the sealing ring body; The inflatable grooves are configured in multiple ways, and the multiple inflatable grooves are evenly arranged around the sealing ring body along the axial direction.

3. The seal ring of claim 1, wherein The sealing ring also includes a first lip, which is annular, and the root of the first lip is fixed to the side surface of the sealing ring body.

4. The seal ring of claim 3, wherein The sealing ring also includes a second lip, which is annular and its root is fixed to the side surface of the sealing ring body. The first and second lips are located on the same side of the sealing ring body and are arranged in a direction perpendicular to the axial direction of the sealing ring body.

5. The seal ring of claim 1, wherein The first main lip includes a first root and a first lip; the bottom of the first root is fixed to the inner surface of the sealing ring body, and the top of the first root is connected to the bottom of the first lip; the cross-section of the first lip obtained by the plane passing through the axis of the sealing ring body is trapezoidal, and the length of the bottom of the first lip along the axis of the sealing ring body is greater than the length of the top of the first lip along the axis of the sealing ring body. The second main lip includes a second root and a second lip; the bottom of the second root is fixed to the inner surface of the sealing ring body, and the top of the second root is connected to the bottom of the second lip; the cross-section of the second lip obtained by the plane passing through the axis of the sealing ring body is trapezoidal, and the length of the bottom of the second lip along the axis of the sealing ring body is greater than the length of the top of the second lip along the axis of the sealing ring body.

6. The seal ring of claim 5, wherein The first root and the second root are substantially parallel; the first lip is inclined away from the annular boss, and the second lip is inclined away from the annular boss.

7. The seal ring of claim 4, wherein The first lip piece is cut by a plane passing through the axis of the sealing ring body, and the cross section S1 is a right triangle. One of the right-angled sides of the cross section S1 is fixed to the side surface of the sealing ring body. The length of the first lip piece along the axial direction of the sealing ring body is 0.25 to 0.4 mm; The second lip piece has a cross section S2 obtained by the plane passing through the axis of the sealing ring body. It is a right triangle, and one of the right-angled sides of the cross section S2 is fixed to the side surface of the sealing ring body. The length of the second lip piece along the axial direction of the sealing ring body is 0.25 to 0.4 mm.

8. A seal for a railway car brake pipe system, comprising: The sealing device includes the sealing ring, mounting base, and connecting base as described in any one of claims 1 to 7; The mounting base has a mounting through hole in the middle, and a slot is provided in the mounting through hole; The connector includes a connecting part and a fixing part. The connecting part has a connecting part through hole, and the fixing part has a fixing part through hole. The connecting part through hole and the fixing part through hole are connected. The fixing part is located in the mounting through hole, and the connecting part extends out of the mounting through hole. An installation cavity is formed between the fixing part and the inner wall of the mounting base, and the sealing ring is located in the installation cavity.

9. The sealing device of claim 8, wherein, The mounting base is provided with connection holes, and there are at least two connection holes, which are located on the outer periphery of the mounting through hole.

10. The sealed device of claim 8, wherein, The sealing ring is the sealing ring according to claim 3; The first lip piece is exposed outside the mounting cavity.

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