Cut-off cock protection sleeve

Abstract

The utility model discloses a kind of cut-off plug protection sleeve, the cut-off plug protection sleeve is made of elastic material as a whole, comprising: main body cover, vertical structure, lower end opening, and first side has the first reserved gap extending from lower end to upper, handle cover, root end is connected and communicated in the upper end of main body cover, and extend to second side, and the end of handle cover is sealed, and tail box cover, one end is connected and communicated in the first side of main body cover, and extend to first side, the lower side of tail box cover has the second reserved gap extending to the end of tail box cover, the root end of this second reserved gap is connected with the upper end of first reserved gap to form continuous gap, the first side and second side are same or opposite, and same time, handle cover is located above tail box cover. According to the cut-off plug protection sleeve of the utility model, water vapor can be effectively avoided to influence the opening and closing sensor of cut-off plug.

Description

Technical Field

[0001] This utility model relates to a protective sleeve for protecting a cut-off gate. Background Technology

[0002] The shut-off valve (full name: air supply shut-off valve, abbreviated as shut-off valve or valve) is a component located below the H26 self-closing valve in the air braking system of a railcar. Its main function is to close the brake pipe, thereby cutting off the air supply from the railcar's main air reservoir to the brake pipe. It should be noted that the shut-off valve must operate reliably. Specifically, the shut-off valve must be open on the braking operation side and closed on the non-braking side. Incomplete opening or closing can lead to issues such as brake failure.

[0003] Although all railcars are equipped with shut-off valves, the installation location of these valves differs depending on the type of railcar. For bullet trains and high-speed trains (in my country, bullet trains and high-speed trains are collectively referred to as bullet trains, with D-series bullet trains being called ordinary bullet train sets with a design speed of 160-250 km / h, and G-series bullet trains being called high-speed bullet train sets with a design speed of 250-350 km / h), the shut-off valves are usually installed on the exterior of the train, specifically on the inner side of the side skirts. Each bullet train or high-speed train is often equipped with dozens of shut-off valves. For example, each standard set of the CRH380B(L) bullet train is equipped with 32 air supply shut-off valves (B15 / 16 / B20 / B27 / H29), all of which are installed on the inner side of the side skirts. When high-speed trains encounter rain during operation, due to their relatively high speed, even with the skirts providing some protection, moisture can still enter the space covered by the skirts due to airflow. This moisture adheres to objects located inside the skirts and gradually descends, potentially entering the switch sensor of the cut-off gate through the handle connecting rod. This could cause the switch sensor to send incorrect signals or even become damaged, reporting an operational malfunction and causing the train to slow down, thus affecting the overall normal operation of the railway network.

[0004] Therefore, although the shut-off valve is just a small component on a high-speed train, its operational reliability has a significant impact on the train's operation. Furthermore, high-speed trains operate over a wide area and are highly likely to encounter severe weather during their journeys. Thus, it is necessary to provide specialized protection against moisture for the shut-off valve. However, current protection for the shut-off valve mainly relies on the skirts to protect against physical impacts or collisions (i.e., mechanical protection), and it is difficult to provide protection against moisture intrusion for high-speed trains (such as the operating speed corresponding to the design speed mentioned earlier). Utility Model Content

[0005] The purpose of this invention is to provide a protective sleeve specifically for preventing moisture from affecting the switch sensor of the cut-off valve.

[0006] According to an embodiment of this utility model, a cut-off gate protective sleeve is provided for waterproofing the cut-off gate of a high-speed train. The cut-off gate protective sleeve is made entirely of an elastic material and includes: The main body is a vertical structure with an opening at the bottom and a first reserved gap extending upward from the bottom on the first side; A handle sleeve, with its base connected to and connected to the upper end of the main body sleeve, extending to a second side, and the end of the handle sleeve sealed; and The tail box sleeve is connected to and communicates with the first side of the main body sleeve at one end and extends to the first side. The lower side of the tail box sleeve has a second reserved gap extending to the end of the tail box sleeve. The root end of the second reserved gap is connected to the upper end of the first reserved gap to form a continuous gap. When the first side and the second side are the same or opposite, and are the same, the handle sleeve is located above the tail box sleeve.

[0007] Optionally, the width of the first reserved seam is 0~0.5mm; The second reserved seam width is -0.5~0.5mm, where the negative seam width indicates that the tail box sleeve wall separates on the lower side, and there is an initial overlap between the two separated parts.

[0008] Optionally, a reducing sleeve is provided at the end of the tail box sleeve, the diameter of which is the same as the outer diameter of the pipeline connected to the tail box. The lower side wall of the reducing sleeve has a third reserved gap that runs through the axial direction of the reducing sleeve; The third reserved gap and the second reserved gap form a continuous gap.

[0009] Optionally, the length of the reducing sleeve shall be not less than 25 mm and not more than 40 mm.

[0010] Optionally, the wall thickness of the main body cover, handle cover, and tail box cover is 1.5mm to 2.5mm.

[0011] Optionally, the inner cavities of the main body sleeve, handle sleeve, and tail box sleeve are modeled after the corresponding outer contours of the cut-off gate; The base of the handle sleeve also has a handle seat sleeve for accommodating the handle base; The main body of the handle seat is shaped to resemble the outer contour of the handle seat, and a space is reserved on the second side so that the handle seat has a second reserved tensioning part on the second side.

[0012] Optionally, the second reserved tensioning part is a vertical semi-cylindrical surface, and the inner diameter of the semi-cylindrical surface is the width of the handle.

[0013] Optionally, a first reserved tensioning section is provided on one side of the main body sleeve, which is opposite to the first side.

[0014] Optionally, the main cross-section of the first reserved tensioning section is an isosceles trapezoid; Correspondingly, the larger base of the isosceles trapezoid is located on the side of the main cavity inside the main body, while the smaller base is on the side away from the main cavity. The cross-section of the first reserved tensioning section also has an arc section with the small base as the chord on one side.

[0015] Optionally, the inner wall of the main sleeve is provided with at least one sealing ring with an inner convex ring structure at the lower part.

[0016] The protective sleeve for the shut-off valve based on this utility model is a protective sleeve specifically developed for waterproofing shut-off valves. Its basic structure is similar to the outline of the shut-off valve in its normal (generally open) state when installed. The main body sleeve is fitted onto the valve body of the shut-off valve during use, while the tail sleeve is similar in outline to the horizontal part of the shut-off valve and is fitted onto this horizontal part. The handle of the shut-off valve is housed in the handle sleeve. The protective sleeve is made entirely of elastic material. For ease of installation, the first side of the main body sleeve has a first reserved gap, and the lower side of the tail sleeve has a second reserved gap. The two reserved gaps form a continuous gap, facilitating the opening of the protective sleeve on this side for installation on the shut-off valve. This is especially true for the handle sleeve, where opening the protective sleeve facilitates the insertion of the handle. After installation, the entire part, including the handle, is covered by the protective sleeve. Leakage is only possible at the reserved gaps, but this area generally prevents splashed water from entering the shut-off valve. Meanwhile, since the protective cover is made of elastic material, and the rotation angle of the handle is usually less than or equal to 90 degrees, its elasticity is sufficient to meet the normal operation of the cut-off gate without removing the protective cover. Attached Figure Description

[0017] Figure 1 This is a schematic diagram (partial section) of the main cross-sectional structure of the cut-off plug door protective sleeve in the first embodiment.

[0018] Figure 2 for Figure 1 AA sectional view.

[0019] Figure 3 for Figure 1 BB cross-sectional view.

[0020] Figure 4 This is a top view of the cut-off plug protective sleeve in the first embodiment.

[0021] Figure 5 This is a schematic diagram (partial section) of the main cross-sectional structure of the cut-off plug door protective sleeve in the second embodiment.

[0022] Figure 6 for Figure 5 CC section view.

[0023] Figure 7 for Figure 5DD sectional view.

[0024] Figure 8 This is a top view of the cut-off plug protective sleeve in the second embodiment.

[0025] In the diagram: 1. Sleeve entrance, 2. Labyrinth sealing ring, 3. Main body sleeve, 4. Handle, 5. Handle seat sleeve, 6. Tail box sleeve, 7. Reduction sleeve, 8. Reserved seam wall, 9. First reserved tensioning part, 10. Reserved seam, 11. Second reserved tensioning part. Detailed Implementation

[0026] As described in the background section, the protection of the shut-off valve mainly protects the built-in switch sensor. False alarms or damage to the switch sensor due to moisture intrusion occur because moisture enters the sensor along the handle connecting rod of the shut-off valve. The handle of the shut-off valve is often located on the upper side of the valve body, meaning the handle connecting rod passes through the valve cavity from top to bottom. Therefore, based on the concept of this utility model, the main purpose is to provide a protective sleeve for shielding the upper part of the shut-off valve body. Besides shielding the upper part of the valve body, the protective sleeve also improves the sealing area and overall integrity, preventing moisture intrusion while also ensuring relatively good installation reliability.

[0027] The protective sleeve for the cut-off plug valve based on the present utility model is mainly fitted onto the cut-off plug valve in a set manner. The installation form is obviously affected by the installation form of the cut-off plug valve. It should be known that the valve body is vertically set when the cut-off plug valve is installed, and the handle connecting rod used to operate the valve core enters the valve body from the upper end of the valve body. That is, from the positional relationship, the handle is located on the upper side of the cut-off plug valve.

[0028] The connection method of the shut-off valve pipeline is generally to connect one pipeline from one side and another pipeline from the bottom. The shut-off valve is similar to a two-position two-way valve. In the embodiments of this utility model, the shut-off valve protective sleeve is mainly used for waterproofing the shut-off valve of the EMU. As can be seen from the foregoing description, the environmental conditions to be waterproofed are splashing water droplets and / or water flowing down from top to bottom onto the handle connecting rod of the shut-off valve.

[0029] Therefore, the protection of the shut-off valve first requires ensuring that the shut-off valve protective sleeve (hereinafter referred to as the protective sleeve for ease of description) can be fitted onto the shut-off valve. In the embodiments of this utility model, several technical conditions need to be adapted. The first technical condition is to ensure that the protective sleeve has a large range of protection while still minimizing the impact on the protective sleeve during the installation of the shut-off valve. Therefore, the protective sleeve is made of elastic material. With the help of the elasticity of the protective sleeve, it can be stretched or unfolded even when a small part of the protective sleeve is cut, so that the protective sleeve can be easily fitted onto the shut-off valve while still having a good protective effect.

[0030] First, regarding the selection of elastic materials, silicone is preferred. In other embodiments, other types of rubber materials may also be used.

[0031] Rubber materials, including silicone, have good waterproof properties and are easy to construct complex chamber structures, while protective sleeves do not require complex chamber structures; in other words, they are relatively easy to manufacture.

[0032] See Figure 1 and Figure 5 The protective cover first includes the main body cover 3, which is adapted to the valve body of the cut-off valve. The valve body of the cut-off valve is mostly a cylindrical structure, which is a cylindrical shape or a rectangular prism with a rectangular bottom. The lower end of the valve body is usually fixed to the vehicle body. Therefore, the valve body is mainly fitted from the upper side to the lower side.

[0033] Correspondingly, the main body of the three-piece set is a vertical structure with an opening at the bottom, forming a structure like... Figure 1 The sleeve opening 1 is shown. And, for example... Figure 1 On the right side, the wall portion of the sleeve without cross-sectional lines can be seen. The portion of the reserved slot wall 8 on the main sleeve 3 corresponds to the first reserved slot. This first reserved slot extends upward from the lower end of the main sleeve 3, allowing the main sleeve 3 to be unfolded from the first reserved slot when installing the protective sleeve. This facilitates the fitting of the main sleeve 3 onto, for example, a valve body, and also allows for... Figure 1 The inner cavity entrance of the handle sleeve 4 shown is exposed to facilitate locating the handle and the inner cavity entrance of the handle sleeve 4.

[0034] Furthermore, regarding the handle sleeve 4, its inner cavity is similar to the handle of the cut-off gate, mainly relying on contour design. That is, the basic shape of the outer contour of the handle determines the shape of the inner cavity of the handle sleeve 4, without the need for additional shape design.

[0035] from Figure 1 and Figure 5 As can be seen in both embodiments, the handle sleeve 4 adopts a design with two extension directions, which is because the handle of the current cut-off gate also has two extension directions in normal state. The design of the two extension directions of the handle sleeve 4 is adapted to the normal state of the handle.

[0036] Based on the concept of this utility model, the root end of the handle sleeve 4 is obviously connected to and communicates with the upper end of the main body sleeve 3. The handle sleeve 4 is constructed as a sleeve with one end sealed, based on the consideration of complete concealment. Obviously, the sealed end is the outward extension of the handle sleeve 4, while its root end is connected to the upper end of the main body sleeve 3. The inner cavity of the handle sleeve 4 communicates with the inner cavity of the main body sleeve 3 at the upper end of the main body sleeve 3. During installation, with the help of the first reserved gap and the elasticity of the protective sleeve itself, the inlet of the inner cavity of the handle sleeve 4 is aligned with the handle. The handle sleeve 4 is then placed on the handle, and the fit between the main body sleeve 3 and the valve body is adjusted.

[0037] For ease of description, the extension direction of the handle sleeve 4 relative to the main body sleeve 3 is referred to as the direction of extension to the second side. The foregoing also mentions the first side, namely the side with the first reserved gap. It should be noted that the description of the first side and the second side is for ease of description only and does not indicate that there is a substantial difference between the first side and the second side. In other words, the first side and the second side can be the same side or different sides.

[0038] exist Figure 1 and Figure 5 In the illustrated structure, a tail box sleeve 6 is also provided on the right side of the main body sleeve 3. The main body sleeve 3 and the tail box sleeve 6 roughly form an L-shaped sleeve, which is adapted to the L-shape of the cut-off plug valve integral shell. For example Figure 1 The right side of the aforementioned main body sleeve 3 is the first side, and the end point of the first reserved gap extending upward is the lower inner wall surface of the tail box sleeve 6.

[0039] The extension direction of the tail box sleeve 6 corresponds to the extension direction of the tube shell of the horizontal part of the cut-off plug.

[0040] Furthermore, the lower side of the tail box sleeve 6 has a second reserved gap extending to the end of the tail box sleeve 6, from... Figure 1 and Figure 5 As can be seen, the first and second reserved gaps are connected to form a continuous gap. Clearly, the upper end of the first reserved gap is connected to the second reserved gap at... Figure 1 The left end is connected. Under these conditions, the main body sleeve 3 and the tail box sleeve 6 can be easily unfolded when installing the protective sleeve. First, the handle sleeve 4 is put on the handle of the cut-off gate, and then the main body sleeve 3 and the tail box sleeve 6 are adjusted and wrapped around the corresponding part of the cut-off gate.

[0041] The definition of continuous gaps in the previous text also indicates that the protective sleeve based on its own elasticity exhibits the characteristics of a tube sleeve under normal conditions. It can be opened or unfolded, for example, the main body sleeve 3. After losing the unfolding or opening force, for example, the main body sleeve 3 will return to the tube sleeve state and be fitted onto, for example, the valve body.

[0042] Regarding the installation of the protective sleeve, based on the fit between the inner cavity of the protective sleeve and the cut-off plug, it can be ensured that the protective sleeve can be reliably secured to the cut-off plug, at least guaranteeing that the protective sleeve will not fall off automatically. Even if, geometrically speaking, the inner cavity of the protective sleeve is similar to the main body of the outer contour of the cut-off plug, but slightly larger, the relative complexity of the shape of the inner cavity of the protective sleeve will still create a good form-locking effect, thus preventing the protective sleeve from falling off automatically. In a more optimized implementation, the inner cavity of the protective sleeve is the same as the main body of the outer contour of the cut-off plug, and the protective sleeve and the cut-off plug are in a tight fit (transition fit and interference fit), making the protective sleeve even less likely to fall off. Furthermore, because the protective sleeve itself has good elasticity, such as a protective sleeve made of silicone material, its installation is still relatively smooth.

[0043] As a recommended installation method, after adjusting the main body sleeve 3 and the tail box sleeve 6, cable ties can be used to bind the tail box sleeve 6 to ensure a tight fit between the tail box sleeve 6 and the cut-off plug, thereby further supplementing the force lock in addition to the form lock condition.

[0044] Figure 1 and Figure 5 The diagram shows two initial states of the handle sleeve 4 and two normal positions of the cut-off door handle, which are common knowledge in this field and will not be elaborated here.

[0045] Regarding the possibility of the handle warping, since the protective case is made of elastic material, warping will not affect its normal use.

[0046] Meanwhile, since the working angle of the handle is usually no more than 90°, for example, a 90° twist is allowed for a sleeve made of silicone or other materials, meaning that the cut-off valve can still be operated without removing the protective sleeve.

[0047] It should also be noted that the part connecting the handle to the cut-off valve is often relatively large, and there is a corresponding handle seat to protect it. Figure 1 and Figure 5 In the illustrated structure, a handle seat 5 is fitted at the base of the handle sleeve 4. The handle seat 5 has a certain height when fitted with the handle base, so that it can fully accommodate the required deformation when the handle rotates. Under this condition, the connection between the handle sleeve 4 and the main body sleeve 3 becomes an indirect connection. Furthermore, in more embodiments, the handle seat 5 can be configured as the base of the handle sleeve 4, in which case the connection between the handle sleeve 4 and the main body sleeve 3 can also be considered a direct connection.

[0048] Regarding the width of the reserved seam 10, based on the concept of this utility model, the sleeve only needs to be separated on one side, and can be unfolded or stretched at the opening position. Therefore, there is no requirement for the minimum seam width. Thus, the smaller the reserved seam width, the better, generally controlled to be no more than 0.5mm. A seam formed by simply cutting can be simply understood as having a seam width of 0mm. Therefore, at least the seam width of the first reserved seam is 0~0.5mm.

[0049] For the second reserved gap, other requirements may apply. Therefore, the gap width of the second reserved gap can be selected as -0.5~0.5mm. The negative gap width indicates that the tail box sleeve wall separates on the lower side, and there is an initial overlap between the two separated parts. The initial state here refers to the state where the protective sleeve is not installed on the cut-off plug.

[0050] exist Figure 1 , 2 As can be seen from Figures 4 to 6 and 8, there is a reducing sleeve at the end of the tail box sleeve 9, namely the reducing sleeve 7 shown in the figure. The inner diameter of the reducing sleeve 7 is smaller than the inner diameter of the tail box sleeve 6, and is the same as the outer diameter of the pipeline connected to the tail box. Under this condition, a locking point is formed.

[0051] Furthermore, for ease of assembly, the reduced diameter sleeve 7 is used in, for example... Figure 1 The lower sidewall has a third reserved gap that extends axially through the reduced diameter sleeve. The third reserved gap and the second reserved gap form a continuous gap.

[0052] As mentioned earlier, the purpose of the reducing sleeve is to form a locking point, thereby making the binding of the protective sleeve on the cut-off valve more reliable. Therefore, the size requirements for the reducing sleeve are relatively low. The length of the reducing sleeve is not less than 25mm and not more than 40mm.

[0053] Regarding the wall thickness of the protective cover, the wall thickness has a relatively small impact on the protection of moisture. However, considering the fatigue life, the wall thickness of the protective cover should not be too small. Therefore, the wall thickness of the main body, such as the main body cover 3, the handle cover 4, and the tail box cover 5, is 1.5mm to 2.5mm.

[0054] As mentioned earlier, during on-site construction, specifically when installing the protective sleeve on the cut-off gate, the sleeve's own elasticity is required for installation. However, even with relatively good elasticity, certain points on the protective sleeve can present installation obstacles. Therefore, as a basic configuration, the inner cavities of the main body sleeve 3, handle sleeve 4, and tail box sleeve 6 are shaped to the corresponding outer contours of the cut-off gate. Simultaneously, the base of the handle sleeve also has a handle seat sleeve 5 for accommodating the handle base; and the main body of the handle seat sleeve 5 is shaped to the outer contour of the handle base, thus reserving a space on the second side, the side where the handle extends outwards. This allows the handle seat sleeve to have a second reserved tension portion 11 on the second side, which acts as a margin to reduce the pulling force during the installation of the protective sleeve.

[0055] Furthermore, the second reserved tensioning part 11 is a vertical semi-cylindrical surface, and the inner diameter of the semi-cylindrical surface is the width of the handle.

[0056] As a further consideration, a first reserved tensioning part 9 is provided on one side of the main body sleeve 3, which is opposite to the first side, in order to reduce the tension force when tensioning the main body sleeve 3.

[0057] exist Figure 2 As can be seen in the illustrated structure, the main body of the cross section of the first reserved tensioning part 9 is an isosceles trapezoid; correspondingly, the large base of the isosceles trapezoid is located on the side of the main cavity inside the main body sleeve 3, and the small base is on the side away from the main cavity; the cross section of the first reserved tensioning part 9 also has an arc portion with the small base as the chord on one side of the small base.

[0058] To improve sealing performance, the inner wall of the main body sleeve 3 is provided with at least one sealing ring with an inner convex ring structure at the bottom.

[0059] Regarding sealing rings, since rubber materials such as silicone rubber are also commonly used materials for making sealing rings, therefore, for such... Figure 1 The labyrinth sealing ring 2 shown can be molded together with the main body sleeve 3.

[0060] The labyrinth seal 2 can be set once, or multiple O-rings can be set if an O-ring structure is used.

Claims

1. A protective sleeve for a cut-off gate, used for waterproofing the cut-off gate of a high-speed train, characterized in that, The cut-off plug protective sleeve is made entirely of elastic material and includes: The main body is a vertical structure with an opening at the bottom and a first reserved gap extending upward from the bottom on the first side; A handle sleeve, with its base connected to and connected to the upper end of the main body sleeve, extending to a second side, and the end of the handle sleeve sealed; and The tail box sleeve is connected to and communicates with the first side of the main body sleeve at one end and extends to the first side. The lower side of the tail box sleeve has a second reserved gap extending to the end of the tail box sleeve. The root end of the second reserved gap is connected to the upper end of the first reserved gap to form a continuous gap. When the first side and the second side are the same or opposite, and are the same, the handle sleeve is located above the tail box sleeve.

2. The cut-off plug protective sleeve according to claim 1, characterized in that, The width of the first reserved seam is 0~0.5mm; The second reserved seam width is -0.5~0.5mm, where the negative seam width indicates that the tail box sleeve wall separates on the lower side, and there is an initial overlap between the two separated parts.

3. The cut-off plug door protective sleeve according to claim 1, characterized in that, At the end of the tail box sleeve is a reducing sleeve, the diameter of which is the same as the outer diameter of the pipeline connected to the tail box. The lower side wall of the reducing sleeve has a third reserved gap that runs through the axial direction of the reducing sleeve; The third reserved gap and the second reserved gap form a continuous gap.

4. The cut-off plug protective sleeve according to claim 3, characterized in that, The length of the reducing sleeve shall not be less than 25mm and not more than 40mm.

5. The cut-off plug protective sleeve according to claim 1, characterized in that, The wall thickness of the main body cover, handle cover, and tail box cover is 1.5mm~2.5mm.

6. The cut-off plug protective sleeve according to claim 1, characterized in that, The inner cavities of the main body sleeve, handle sleeve, and tail box sleeve are modeled after the corresponding outer contours of the cut-off gate; The base of the handle sleeve also has a handle seat sleeve for accommodating the handle base; The main body of the handle seat is shaped to resemble the outer contour of the handle seat, and a space is reserved on the second side so that the handle seat has a second reserved tensioning part on the second side.

7. The cut-off plug protective sleeve according to claim 6, characterized in that, The second reserved tensioning part is a vertical semi-cylindrical surface, and the inner diameter of the semi-cylindrical surface is the width of the handle.

8. The cut-off plug protective sleeve according to claim 6, characterized in that, The main body sleeve has a first reserved tensioning part on one side, which is opposite to the first side.

9. The cut-off plug door protective sleeve according to claim 8, characterized in that, The main body of the cross section of the first reserved tensioning section is an isosceles trapezoid; Correspondingly, the larger base of the isosceles trapezoid is located on the side of the main cavity inside the main body, while the smaller base is on the side away from the main cavity. The cross-section of the first reserved tensioning section also has an arc section with the small base as the chord on one side.

10. The cut-off plug protective sleeve according to claim 1, characterized in that, The inner wall of the main sleeve is provided with at least one sealing ring with an inner convex ring structure at the bottom.

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