Integrated cylinder valve and gas supply system applying same

Abstract

The utility model discloses an integrated cylinder valve which is connected with a gas cylinder in a sealed mode, the cylinder valve is arranged at a bottle opening of the gas cylinder, the cylinder valve comprises a lower shell located in the bottle opening and an upper shell exposed out of the bottle opening, and a plurality of channels are formed in the upper shell and the lower shell. Each channel of the upper shell is independently provided with one of a main valve assembly, a stop valve assembly, an electromagnetic valve assembly or a TPRD assembly, each channel of the lower shell is independently provided with one of an overflow valve assembly, a temperature sensor assembly and a one-way valve assembly, a receding cavity is formed in the channel provided with the TPRD assembly, and a release valve assembly is arranged in the receding cavity. The upper shell is provided with the receding cavity, the receding cavity is located in the channel provided with the TPRD, the receding cavity and the TPRD are integrally arranged in the same channel, and the release valve assembly is arranged in the receding cavity and integrated with the TPRD assembly, so that the overall structure of the cylinder valve is more compact, the shape of the cylinder valve can be reasonably optimized, the size of the cylinder valve is reduced, and the assembling space needed by the cylinder valve during installation is smaller; and the installation under different conditions can be adapted.

Description

Technical Field

[0001] This application belongs to the field of gas cylinder valves, specifically relating to an integrated cylinder valve and a gas supply system using it. Background Technology

[0002] The hydrogen supply system on a hydrogen fuel cell vehicle can be divided into two parts: one is the on-board high-pressure hydrogen supply system, which is generally provided by a gas cylinder supplier or a hydrogen supply system supplier; the other is the low-pressure hydrogen supply system, which is generally integrated into the fuel cell engine.

[0003] The hydrogen system of a hydrogen fuel cell mainly includes:

[0004] Hydrogen storage module: A hydrogen storage module is a component specifically designed to store hydrogen gas, and it is an important part of the hydrogen supply system in a hydrogen fuel cell vehicle. Specifically, the hydrogen storage module includes core elements such as high-pressure composite material cylinders, cylinder supports, and connecting pipelines. Each cylinder is equipped with a cylinder valve, and the cylinders are connected in parallel through pipelines.

[0005] Hydrogen refueling module: Includes a hydrogen refueling port and a high-pressure gauge. The hydrogen refueling port integrates a hydrogen nozzle, filter, and one-way valve. The hydrogen refueling module can also be integrated with a high-pressure exhaust valve upon user request, for gas replacement within the cylinder and for actively releasing high-pressure hydrogen from the cylinder during vehicle maintenance and repair.

[0006] Pressure regulating module (combination valve): Highly integrated and powerful, it significantly simplifies hydrogen systems. The combination valve internally includes components such as a filter, pressure reducing valve, low-pressure relief valve, exhaust shut-off valve, and pressure sensor. The low-pressure relief valve is used to release excess hydrogen through the low-pressure exhaust line when the pressure reducing valve malfunctions and causes overpressure at the outlet. The exhaust shut-off valve is used to actively release hydrogen from the downstream pipeline of the cylinder valve during gas replacement, hydrogen system maintenance, and repair.

[0007] In hydrogen storage modules, cylinder valves typically integrate functional components such as thermal fusion locks (TPRDs), manual shut-off valves, solenoid valves, overflow valves, pressure sensors, and temperature sensors, playing a crucial role in the safe use of gas cylinders.

[0008] With the widespread use of hydrogen fuel cell vehicles, the appearance and models of these vehicles have changed to adapt to market demands. This has led to modifications in the installation of hydrogen storage modules for different vehicle models based on the available space. Since the cylinder valve has many integrated components and irregular shapes, and plays an important role in regulating and controlling the gas, it also requires necessary space for installation to form protection. Therefore, mutual adaptation and adjustment are required during installation, which increases the difficulty of processing and installation and causes inconvenience in assembly. Utility Model Content

[0009] This application provides an integrated cylinder valve and an air supply system using the same, further solving the problem of adaptability of the integrated cylinder valve to different vehicle models.

[0010] The technical solution adopted in this application is as follows:

[0011] An integrated cylinder valve is provided, which is sealed to a gas cylinder. The cylinder valve is located at the cylinder opening and includes a lower housing inside the cylinder opening and an upper housing exposed outside the cylinder opening. The upper and lower housings have multiple channels. Each channel of the upper housing is provided with one of the following: a main valve assembly, a shut-off valve assembly, a solenoid valve assembly, or a TPRD assembly. Each channel of the lower housing is provided with one of the following: an overflow valve assembly, a temperature sensor assembly, or a one-way valve assembly. The channel with the TPRD assembly has a cavity, and the cavity has a venting valve assembly.

[0012] In a preferred implementation of an integrated bottle valve, the TPRD assembly includes a valve core, a valve seat, an end cap, a bushing, and a spring. The bushing and the end cap enclose a cavity. The vent valve assembly includes a vent cap and a vent screw disposed within the cavity.

[0013] In a preferred implementation of an integrated bottle valve, the TPRD assembly includes a temperature-sensing glass bulb, and the vent cap has a groove facing the temperature-sensing glass bulb, with the end of the temperature-sensing glass bulb located within the groove.

[0014] In a preferred implementation of an integrated bottle valve, the vent cap, vent screw, valve core, and end cap are coaxially arranged.

[0015] In a preferred implementation of an integrated bottle valve, the relief valve assembly and the TPRD assembly share a spring.

[0016] In a preferred implementation of an integrated bottle valve, a friction-reducing washer is provided between the vent cap and the vent screw.

[0017] In a preferred implementation of an integrated bottle valve, one of the vent cap and the vent screw is provided with a limiting groove, and the other is provided with a limiting protrusion that mates with the limiting groove, with a friction-reducing pad located within the limiting groove.

[0018] In a preferred implementation of an integrated bottle valve, a sealing ring is provided between the vent cap and the bushing.

[0019] In a preferred embodiment of an integrated bottle valve, two channels for a main valve assembly and a shut-off valve assembly are coaxially arranged in the upper housing, and / or two channels for a TPRD assembly and a solenoid valve assembly are coaxially arranged in the upper housing.

[0020] This application also includes a gas supply system for use in a hydrogen fuel cell vehicle. The gas supply system includes a hydrogen refueling module, a pressure regulating module, and a hydrogen storage module. The hydrogen storage module includes a gas cylinder, a gas cylinder support, and connecting pipelines. The gas cylinder is provided with a cylinder valve as described above at its opening.

[0021] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0022] (1) The present application provides a cavity in the upper shell, which is located within the channel containing the TPRD. The vent valve assembly and the TPRD are integrated into the same channel. When the temperature changes, the vent valve and TPRD react accordingly. For example, if the cylinder temperature suddenly rises for some reason, causing the gas pressure inside the cylinder to rise, the vent valve will automatically release pressure when the pressure exceeds the set value of the vent valve, ensuring that the gas cylinder is within a safe working pressure range. The TPRD (thermal thrombus) automatically melts and releases hydrogen when the ambient temperature rises abnormally, preventing the risk of explosion caused by external fire. The vent valve assembly is located in the cavity and will not interfere with the TPRD assembly. The further integration of the TPRD assembly and the vent valve assembly can reasonably optimize the cylinder valve layout, making the overall structure of the cylinder valve more compact, with a higher degree of integration, and requiring less assembly space, thus facilitating the cylinder valve's adaptation to different application installation scenarios.

[0023] (2) By forming a cavity within the TPRD assembly, the relief valve assembly is placed within the cavity and integrated with the TPRD assembly, making the overall structure of the bottle valve more compact. This allows for reasonable optimization of the bottle valve's shape and reduction of its volume, resulting in less assembly space required during installation and adaptability to different installation conditions.

[0024] (3) By setting a groove in the venting cover, the temperature-sensing glass ball in the TPRD assembly is limited by the venting cover, and the position of the venting cover in the TPRD assembly is also determined. The venting cover and the temperature-sensing glass ball are used to position the venting cover, so that the venting cover is better integrated into the TPRD assembly. The overall structure is more compact through the reasonable layout of the venting valve.

[0025] (4) By setting the venting gland, venting screw, valve core and end cap of the TPRD assembly coaxially, the venting valve assembly is arranged in a reasonable layout with the TPRD assembly in the cavity formed by the TPRD assembly. The assembly process is easy and the position of the venting valve assembly in the TPRD assembly is easy to determine.

[0026] (5) By setting the relief valve assembly and the TPRD assembly to share the same spring, since the relief cap, relief screw and valve core and end cap are set coaxially, when the TPRD assembly and the relief valve assembly share the same spring, the gas cylinder can be protected whether the relief valve assembly or the TPRD assembly is effective.

[0027] (6) The present application solution provides a friction-reducing gasket between the venting gland and the venting screw. This is because the venting valve assembly is characterized by the fact that the venting gland and the venting screw are in constant contact throughout the process. Therefore, the venting valve will experience more severe wear than other valve assemblies. The friction-reducing gasket between the two provides further protection for the venting gland and the venting screw.

[0028] (7) By setting a sealing ring, hydrogen gas is prevented from being discharged into the air outside the valve via the gaps in the parts in addition to being discharged from the pipeline, thus ensuring that hydrogen gas is discharged into the designated area through the predetermined pipeline, which helps to enhance the safety of the device. Attached Figure Description

[0029] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0030] Figure 1 This is a schematic diagram of the bottle valve in one embodiment of the present invention;

[0031] Figure 2 This is a cross-sectional view of the upper housing of the bottle valve in one embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram of the cooperation structure between the TPRD component and the relief valve component in one embodiment of the present invention;

[0033] Figure 4 This is a cross-sectional view of an overflow valve assembly according to an embodiment of the present invention;

[0034] Figure 5 This is a cross-sectional view of the temperature sensor assembly and the one-way valve assembly in one embodiment of the present invention.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1-Bottle valve;

[0037] 100-Upper housing, 110-Main valve assembly, 120-Stop valve assembly, 130-Solenoid valve assembly, 140-TPRD assembly, 141-Valve core, 142-Valve seat, 143-End cover, 144-Bushing, 145-Temperature sensing glass ball, 146-Spring, 150-Relief valve assembly, 151-Relief gland, 1511-Limiting groove, 152-Relief screw, 1521-Limiting protrusion, 153-Anti-friction gasket, 160-Sealing ring, 170-Void cavity;

[0038] 200 - Lower housing, 210 - Temperature sensor assembly, 220 - Overflow valve assembly, 230 - Check valve assembly. Detailed Implementation

[0039] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0040] Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below. It should be noted that, unless otherwise specified, the embodiments of this application and the features thereof can be combined with each other.

[0041] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0042] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0043] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0044] This application provides an integrated bottle valve, such as Figures 1 to 5As shown, the cylinder valve 1 is sealed to the gas cylinder. The cylinder valve 1 is provided at the cylinder opening. The cylinder valve 1 includes a lower housing 200 located inside the cylinder opening and an upper housing 100 exposed outside the cylinder opening. The upper housing 100 and the lower housing 200 are provided with multiple channels. Each channel of the upper housing 100 is provided with one of the following: a main valve assembly 110, a shut-off valve assembly 120, a solenoid valve assembly 130, or a TPRD assembly 140. Each channel of the lower housing 200 is provided with one of the following: an overflow valve assembly 220, a temperature sensor assembly 210, or a one-way valve assembly 230. The channel provided with the TPRD assembly 140 is provided with a cavity 170, and the cavity 170 is provided with a relief valve assembly 150.

[0045] This application solution provides a cavity 170 in the upper housing 100, located within a channel equipped with a TPRD (Potential Pressure Relief Module). The relief valve assembly 150 and the TPRD assembly 140 are integrated within the same channel. When the temperature changes, the relief valve assembly 150 and the TPRD assembly 140 react accordingly. For example, if the cylinder temperature suddenly rises for some reason, causing an increase in internal gas pressure, the relief valve automatically releases pressure when the pressure exceeds its set value, ensuring the cylinder remains within a safe operating pressure range. The TPRD assembly 140 automatically melts and releases hydrogen when the ambient temperature rises abnormally, preventing the risk of explosion caused by external fires. Further integration of the TPRD assembly 140 and the relief valve assembly 150 optimizes the layout of the cylinder valve 1, resulting in a more compact overall structure, higher integration, and less required assembly space, thus facilitating the cylinder valve 1's adaptability to various application scenarios.

[0046] Cylinder valve 1 plays a crucial role in the safe use of the gas cylinder. The TPRD assembly 140 within it prevents explosions caused by surrounding fires. If the temperature sensor detects excessively high temperatures around the hydrogen cylinder, the thermal plug will melt, releasing hydrogen at a low flow rate. If an ignition source is present, only slow combustion of the hydrogen will occur, preventing a deflagration. The solenoid valve assembly 130 is typically driven by a 12V DC power supply and is normally closed when there is no power. Its main function is to open and close the gas cylinder, and it is linked to the hydrogen leak alarm system. When the system is powered on normally, the solenoid valve is open. Once the leaked hydrogen concentration reaches the protection threshold, it automatically closes, thus cutting off the hydrogen supply.

[0047] The shut-off valve assembly 120 is normally open, allowing manual shut-off of the hydrogen source in case the cylinder solenoid valve fails. The combined action of the solenoid valve and the manual shut-off valve effectively prevents hydrogen leakage.

[0048] The relief valve assembly 150 can automatically release pressure when the hydrogen pressure in the hydrogen storage cylinder exceeds a set value. For example, if the cylinder temperature suddenly rises for some reason, causing the gas pressure inside the cylinder to rise, the safety valve will automatically release pressure when the pressure exceeds the safety valve's set value, ensuring that the gas cylinder is within a safe operating pressure range.

[0049] Temperature sensor assembly 210 determines whether there are any abnormalities in the external environment by detecting changes in gas temperature. If the gas temperature suddenly rises sharply, and if it is not a malfunction of the temperature sensor, a fire may occur around the gas cylinder, which can be immediately triggered by the hydrogen system controller.

[0050] Furthermore, the TPRD assembly 140 includes a valve core 141, a valve seat 142, an end cap 143, a bushing 144, and a spring 146. The bushing 144 and the end cap 143 enclose a cavity 170. The relief valve assembly 150 includes a relief cap 151 and a relief screw 152 disposed in the cavity 170.

[0051] By forming a cavity 170 within the TPRD assembly 140, the relief valve assembly 150 is placed within the cavity 170 and integrated with the TPRD assembly 140, making the overall structure of the bottle valve 1 more compact. This allows for reasonable optimization of the shape of the bottle valve 1 and reduction of its volume, resulting in less assembly space required for installation and adaptability to different installation conditions.

[0052] As one implementation of this embodiment, the TPRD assembly 140 includes a temperature-sensing glass ball 145, and the vent cap 151 is provided with a groove facing the temperature-sensing glass ball 145, with the end of the temperature-sensing glass ball 145 located in the groove.

[0053] By providing a groove in the venting cap 151, the temperature-sensing glass ball 145 in the TPRD assembly 140 is limited by the venting cap 151, which also determines the position of the venting cap 151 in the TPRD assembly 140. By using the venting cap 151 and the temperature-sensing glass ball 145 to cooperate and position the venting cap 151, it is better integrated into the TPRD assembly 140. The reasonable layout of the venting valve makes the overall structure more compact.

[0054] As one implementation of this embodiment, the venting gland 151, the venting screw 152, the valve core 141, and the end cap 143 are coaxially arranged.

[0055] By coaxially arranging the venting gland 151, venting screw 152, valve core 141, and end cap 143 of the TPRD assembly 140, the venting valve assembly 150 is arranged in a reasonable layout with the TPRD assembly 140 within the cavity 170 formed by the TPRD assembly 140. This reduces assembly difficulty and makes it easier to determine the position of the venting valve assembly 150 within the TPRD assembly 140.

[0056] Preferably, the relief valve assembly 150 and the TPRD assembly 140 share the same spring 146.

[0057] By setting the relief valve assembly 150 and the TPRD assembly 140 to share the spring 146, since the relief cap 151, relief screw 152, valve core 141 and end cap 143 are coaxially arranged, when the TPRD assembly 140 and the relief valve assembly 150 share the spring 146, the purpose of protecting the gas cylinder can be achieved regardless of whether the relief valve assembly 150 or the TPRD assembly 140 is in effect.

[0058] like Figure 3 As shown, in a preferred embodiment, a friction-reducing washer 153 is provided between the venting cap 151 and the venting screw 152.

[0059] This application solution provides a friction-reducing gasket 153 between the venting gland 151 and the venting screw 152. This addresses the characteristics of the venting valve assembly 150, where the venting gland 151 and the venting screw 152 are in constant contact throughout the process. As a result, the venting valve experiences more severe wear compared to other valve assemblies 140. The friction-reducing gasket 153 further protects both the venting gland 151 and the venting screw 152.

[0060] Furthermore, one of the venting cap 151 and the venting screw 152 is provided with a limiting groove 1511, and the other is provided with a limiting protrusion 1521 that mates with the limiting groove 1511. The anti-friction washer 153 is located within the limiting groove 1511. Preferably, the venting cap 151 is provided with a limiting groove 1511, and the end of the venting screw 152 forms a limiting protrusion 1521 that mates with the limiting groove 1511.

[0061] In a preferred embodiment, a sealing ring 160 is provided between the vent cap 151 and the bushing 144. By providing the sealing ring 160, hydrogen gas is prevented from escaping into the air outside the cylinder valve 1 through the gaps in the parts during venting, in addition to venting through the pipeline. This ensures that the hydrogen gas is vented to the designated area through the predetermined pipeline, which helps to enhance the safety of the device.

[0062] In a preferred embodiment of an integrated bottle valve 1, two channels of a main valve assembly 110 and a shut-off valve assembly 120 are coaxially arranged in the upper housing 100, and / or two channels of a TPRD assembly 140 and a solenoid valve assembly 130 are coaxially arranged in the upper housing 100.

[0063] Preferably, the two channels of the main valve assembly 110 and the shut-off valve assembly 120 are coaxially arranged in the upper housing 100. At the same time, the two channels of the TPRD assembly 140 and the solenoid valve assembly 130 are coaxially arranged in the upper housing 100, which reasonably optimizes the layout of the internal structure of the bottle valve and avoids assembly or application interference between the components.

[0064] This application also includes a gas supply system for use in a hydrogen fuel cell vehicle. The gas supply system includes a hydrogen refueling module, a pressure regulating module, and a hydrogen storage module. The hydrogen storage module includes a gas cylinder, a gas cylinder support, and connecting pipelines. The gas cylinder is provided with a cylinder valve 1 as described above at the cylinder opening.

[0065] Understandably, hydrogen fuel cell vehicles typically have a hydrogen storage module, a hydrogen refueling module, and a pressure regulating module. The hydrogen storage module includes high-pressure composite gas cylinders, gas cylinder supports, and connecting pipelines, etc. Each cylinder opening is equipped with a cylinder valve 1, and the gas cylinders are connected in parallel through pipelines.

[0066] The hydrogen refueling module includes a hydrogen refueling port and a high-pressure gauge. The hydrogen refueling port integrates functional components such as a hydrogen nozzle, filter, and one-way valve. The hydrogen refueling module can also integrate a high-pressure exhaust valve according to actual needs, for gas replacement in the gas cylinder and for actively releasing high-pressure hydrogen in the gas cylinder during vehicle maintenance and repair.

[0067] The pressure regulating module (combination valve) is highly integrated and powerful, significantly simplifying hydrogen systems. The combination valve internally includes functional components such as a filter, pressure reducing valve, low-pressure relief valve, exhaust shut-off valve, and pressure sensor. The low-pressure relief valve is used to release excess hydrogen through the low-pressure exhaust line when the pressure reducing valve malfunctions and causes overpressure at the outlet. The exhaust shut-off valve is used to actively release hydrogen from the downstream pipeline of cylinder valve 1 during gas replacement, hydrogen system maintenance, and repair.

[0068] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0069] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0070] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the scope of the claims of this application.

Claims

1. An integrated bottle valve characterized by, The cylinder valve is sealed to the gas cylinder. The cylinder valve is located at the cylinder opening. The cylinder valve includes a lower housing located inside the cylinder opening and an upper housing exposed outside the cylinder opening. The upper housing and the lower housing have multiple channels. Each channel of the upper housing is provided with one of a main valve assembly, a shut-off valve assembly, a solenoid valve assembly, or a TPRD assembly. Each channel of the lower housing is provided with one of an overflow valve assembly, a temperature sensor assembly, or a one-way valve assembly. The channel with the TPRD assembly has a cavity, and the cavity has a venting valve assembly.

2. An integrated valve for a bottle as defined in claim 1, wherein The TPRD assembly includes a valve core, valve seat, end cap, bushing, and spring. The bushing and end cap enclose the cavity. The relief valve assembly includes a relief cap and a relief screw disposed within the cavity.

3. An integrated valve for a bottle as defined in claim 2, wherein The TPRD assembly includes a temperature-sensitive glass bulb, and the vent cap has a groove facing the temperature-sensitive glass bulb, with the end of the temperature-sensitive glass bulb located within the groove.

4. An integrated valve for a bottle as defined in claim 2, wherein The venting cap, the venting screw, the valve core, and the end cap are coaxially arranged.

5. An integrated valve for a bottle as defined in claim 4, wherein The relief valve assembly and the TPRD assembly share the same spring.

6. An integrated valve for a bottle as defined in claim 2, wherein A friction-reducing washer is provided between the venting cap and the venting screw.

7. An integrated valve for a bottle as defined in claim 6, wherein One of the venting cap and the venting screw is provided with a limiting groove, and the other is provided with a limiting protrusion that mates with the limiting groove. The anti-friction pad is located in the limiting groove.

8. An integrated valve for a bottle as defined in claim 2, wherein A sealing ring is provided between the venting cap and the bushing.

9. An integrated valve for a bottle as defined in claim 1, wherein The main valve assembly and the shut-off valve assembly have two channels coaxially arranged in the upper housing, and / or the TPRD assembly and the solenoid valve assembly have two channels coaxially arranged in the upper housing.

10. A gas supply system characterized by, The gas supply system is used in a hydrogen fuel cell vehicle. The gas supply system includes a hydrogen refueling module, a pressure regulating module, and a hydrogen storage module. The hydrogen storage module includes a gas cylinder, a gas cylinder support, and connecting pipelines. The gas cylinder is provided with a cylinder valve as described in any one of claims 1-9 at its cylinder opening.

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