High-pressure gas cylinder combination valve with accurate temperature sensing function and high-pressure gas cylinder

Abstract

The utility model provides a high-pressure gas cylinder combination valve with an accurate temperature sensing function and a high-pressure gas cylinder. A high-pressure gas cylinder combination valve with an accurate temperature sensing function is installed at a bottle opening of a high-pressure gas cylinder and comprises a valve body, a temperature sensing channel is arranged on the valve body in a penetrating mode, and the temperature sensing channel is communicated with the high-pressure gas cylinder; and the temperature sensor is installed in the temperature sensing channel, and the temperature sensor is used for detecting the internal temperature of the high-pressure gas cylinder. According to the high-pressure gas cylinder with the accurate temperature sensing function, the high-pressure gas cylinder combination valve with the accurate temperature sensing function is installed at a cylinder opening of the high-pressure gas cylinder.

Description

Technical Field

[0001] The utility model relates to the field of combined valves for hydrogen energy storage and supply systems, and more specifically, to a high-pressure gas cylinder combined valve and a high-pressure gas cylinder with an accurate temperature sensing function. Background Art

[0002] With the continuous breakthroughs in the application technology of hydrogen-powered vehicles, hydrogen-powered trains, and hydrogen-powered aircraft, the demand for gaseous high-pressure hydrogen storage systems continues to increase. On-board hydrogen storage is mainly achieved by carbon fiber-wrapped gas cylinders plus high-pressure combination valves. At present, the combination valves used in domestic hydrogen-powered vehicles are mainly imported products and domestic imitation products.

[0003] Common problems with imported combination valves are:

[0004] 1. Poor sealing, accompanied by aging of the rubber ring and temperature changes, will cause hydrogen leakage, and the gas cylinder and combination valve need to be removed for maintenance.

[0005] 2. When the main components of the combination valve fail, the hydrogen in the hydrogen storage bottle needs to be released and the combination valve needs to be removed for repair or replacement, and some pipes need to be replaced. After the repair, the gas cylinder needs to be replaced with nitrogen and hydrogen and airtight before it can be used, which is time-consuming, labor-intensive, and costly and is not economical.

[0006] 3. The temperature sensor is installed in a position that cannot measure the maximum temperature of the hydrogen filling inside the gas cylinder, and the sensor signal is a voltage signal with poor anti-interference ability, so the temperature value cannot be accurately measured. The temperature measurement of the gas cylinder when filling with hydrogen is an important indicator of hydrogen filling safety. If it exceeds the standard, the pressure bearing capacity of the gas cylinder will decrease, creating the risk of gas cylinder explosion accidents.

[0007] 4. The low-pressure hydrogen discharge flow rate of the gas cylinder combination valve is insufficient. Since the hydrogen storage cylinder of the vehicle-mounted hydrogen storage system is not just one gas cylinder but a group of gas cylinders, there are generally 6-8 gas cylinders in a group on buses and logistics vehicles. When the gas cylinders in a group are used together, the pressure difference in each gas cylinder may cause the gas cylinder with a slightly higher pressure to release hydrogen first, and it cannot be guaranteed that all gas cylinders release hydrogen together. At this time, if only 2-3 gas cylinders release hydrogen (instantaneously), it will cause insufficient hydrogen supply to the fuel cell, affecting the normal power output of the vehicle. For example, the hydrogen discharge flow rate of a certain type of combination valve is only 19m 3 / h, which cannot meet the flow requirement of fuel cell power above 80kw.

[0008] The temperature sensor of the combination valve currently on the market is installed in the middle of the combination valve and the cylinder installation thread. It has been found in actual use that when filling hydrogen, the temperature measurement result will be lower than the actual temperature value inside the cylinder because it is too close to the hydrogen filling port. The temperature is transmitted to the temperature sensor only when the entire cylinder filling temperature is very high, causing the temperature measurement to lag, seriously affecting the safety of hydrogen filling. When the cylinder is filled with hydrogen, the highest temperature distribution is about 300mm inside the cylinder mouth. Therefore, to ensure the safety of hydrogen filling, the temperature sensor should not be installed between the combination valve and the cylinder thread, but should be inserted through the combination valve to a position about 300mm inside the cylinder, so as to effectively measure the precise temperature parameters and ensure the safety of hydrogen filling. Although the production cost of the combination valve will increase, it will effectively ensure the safety of hydrogen filling in the cylinder. Utility Model Content

[0009] The utility model aims to provide a high-pressure gas cylinder combined valve and a high-pressure gas cylinder with an accurate temperature sensing function.

[0010] The utility model aims to solve the problems existing in the prior art.

[0011] Compared with the prior art, the technical solution of the utility model and its beneficial effects are as follows:

[0012] The first aspect disclosed by the utility model provides a high-pressure gas cylinder combination valve with a precise temperature sensing function, which is installed at the bottle mouth of the high-pressure gas cylinder, comprising: a valve body, which is installed on the bottle mouth of the high-pressure gas cylinder, and a temperature sensing channel is provided through the valve body, and the temperature sensing channel is connected to the high-pressure gas cylinder; a temperature sensor, which is installed in the temperature sensing channel, and the temperature sensor is used to detect the internal temperature of the high-pressure gas cylinder.

[0013] As a further improvement, the valve body is provided with a gas cylinder to cut-off valve channel and a hydrogen filling and supply channel, the gas cylinder to cut-off valve channel is connected to the hydrogen filling and supply channel, and the hydrogen filling and supply channel is connected to the high-pressure gas cylinder.

[0014] As a further improvement, it further comprises a probe, wherein the probe is installed in the temperature sensing channel, and the temperature sensor is installed in the probe.

[0015] As a further improvement, the probe is inserted into the gas cylinder at 100 mm-350 mm, so that when filling hydrogen, the temperature sensor obtains accurate temperature values ​​of the changes in the gas cylinder.

[0016] As a further improvement, the upper end of the probe is provided with an external thread section, the upper end of the temperature sensing channel is provided with an internal thread section, and the probe is threadedly connected to the temperature sensing channel.

[0017] As a further improvement, the model of the temperature sensor is PT100 or PT1000.

[0018] The second aspect disclosed by the utility model provides a high-pressure gas cylinder with an accurate temperature sensing function, and the bottle mouth of the high-pressure gas cylinder is installed with the high-pressure gas cylinder combination valve with an accurate temperature sensing function.

[0019] The beneficial effects of the utility model are:

[0020] The utility model realizes temperature detection in a high-pressure gas cylinder by arranging a temperature sensing channel in a valve body and installing a temperature sensor in the temperature sensing channel. The temperature sensing device can be repaired and replaced at any time, thus solving the problem of accurate temperature measurement by the temperature sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a first schematic diagram of a high-pressure gas cylinder combination valve with accurate temperature sensing function provided by an embodiment of the utility model.

[0022] Figure 2 This is a second schematic diagram of a high-pressure gas cylinder combination valve with accurate temperature sensing function provided by an embodiment of the utility model.

[0023] Figure 3 This is a third schematic diagram of a high-pressure gas cylinder combination valve with precise temperature sensing function provided by an embodiment of the utility model.

[0024] Figure 4 It is a cross-sectional schematic diagram of a high-pressure gas cylinder combination valve with accurate temperature sensing function provided by an embodiment of the utility model.

[0025] Figure 5 It is a schematic diagram of the principle of the combination valve provided by the embodiment of the utility model.

[0026] Figure 6 It is a structural schematic diagram of a high-pressure gas cylinder with a combined valve provided in an embodiment of the utility model.

[0027] In the figure:

[0028] 1. Valve body 11. Passage from gas cylinder to stop valve

[0029] 12. Hydrogen filling and supply channel 13. Hydrogen discharge port

[0030] 14. Hydrogen supply port 15. Temperature sensing channel

[0031] 2. Pressure sensor 3. Check valve

[0032] 4. Solenoid valve 5. TPRD temperature driven overpressure safety relief valve

[0033] 6. Manual stop valve 7. Temperature sensor

[0034] 8. High-pressure gas cylinder 9. Probe DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0036] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0037] Reference Figures 1 to 6 As shown,

[0038] A high-pressure gas cylinder combination valve with precise temperature sensing function, installed at the bottle mouth of the high-pressure gas cylinder 8, comprising: a valve body 1, the valve body 1 is provided with a gas cylinder to stop valve channel 11 and a hydrogen filling and supply channel 12, the gas cylinder to stop valve channel 11 is connected to the hydrogen filling and supply channel 12, the valve body 1 is installed on the bottle mouth of the high-pressure gas cylinder 8, and the hydrogen filling and supply channel 12 is connected to the high-pressure gas cylinder 8; a pressure sensor 2, the pressure sensor 2 is installed on the hydrogen filling and supply channel 12; a one-way valve 3, the one-way valve 3 is installed on the hydrogen filling and supply channel 12, and the one-way valve 3 is used to reversely close the hydrogen filling and supply channel 12; a solenoid valve 4, the solenoid valve 4 is installed on the valve body 1, and the solenoid valve 4 is used to control the opening and closing of the hydrogen charging and supply channel 12; a TPRD temperature-driven overpressure safety relief valve 5, and the TPRD temperature-driven overpressure safety relief valve 5 is installed on the valve body 1; a manual stop valve 6, and the manual stop valve 6 is installed on the valve body 1, and the manual stop valve 6 is used to control the connection and cutoff of the hydrogen charging and supply channel 12 and the channel from the gas cylinder to the stop valve 11; wherein, when a component fails and needs to be replaced, the manual stop valve 6 is controlled to cut off the hydrogen charging and supply channel 12 and the channel from the gas cylinder to the stop valve 11 to prevent hydrogen from leaking from the high-pressure gas cylinder 8.

[0039] Among them, when the valve assembly fails and needs to be replaced, the manual stop valve 6 is controlled to cut off the hydrogen filling and supply channel 12 and the gas cylinder to the stop valve channel 11 to prevent hydrogen from flowing from the high-pressure gas cylinder 8 to the valve assembly at the rear end of the manual stop valve 6, thereby not affecting the replacement of the valve assembly.

[0040] The valve body 1 is provided with a hydrogen discharge port 13 , and the TPRD temperature-driven overpressure safety relief valve 5 is used to control the connection and cutoff between the hydrogen charging and supplying channel 12 and the hydrogen discharge port 13 .

[0041] The valve body 1 is provided with a hydrogen supply port 14 , and the hydrogen supply port 14 is connected to the hydrogen charging and supply channel 12 .

[0042] A temperature sensing channel 15 is provided through the valve body 1 , and the temperature sensing channel 15 is connected to the high-pressure gas cylinder 8 .

[0043] It also includes a temperature sensor 7 , which is installed in the temperature sensing channel 15 , and is used to detect the internal temperature of the high-pressure gas cylinder 8 .

[0044] It also includes a probe 9, which is installed in the temperature sensing channel 15, and the temperature sensor 7 is installed in the probe 9. When the temperature sensor 7 fails and needs to be replaced, the probe 9 is not disassembled and only the temperature sensor 7 is replaced.

[0045] The probe 9 is inserted into the gas cylinder at 100 mm to 350 mm, so that when filling hydrogen, the temperature sensor 7 obtains an accurate temperature value of the gas cylinder.

[0046] The probe 9 is provided with a threaded section at its upper end, the temperature sensing channel 15 is provided with a threaded section at its upper end, and the probe 9 is threadedly connected to the temperature sensing channel 15 .

[0047] The model of the temperature sensor 7 is PT100 or PT1000.

[0048] The material of the probe 9 is stainless steel. The lower end of the external thread of the stainless steel hollow probe 9 and the lower end of the internal thread of the temperature sensing channel 15 are respectively provided with 59-degree and 60-degree conical surfaces for a sealing structure that can withstand a high pressure of 70 MPa.

[0049] A high-pressure gas cylinder 8 with an accurate temperature sensing function, wherein the bottle mouth of the high-pressure gas cylinder 8 is installed with the high-pressure gas cylinder combination valve with an accurate temperature sensing function.

[0050] A temperature sensing channel 15 is drilled along the axial direction of the combination valve, and threads are made on the temperature sensing channel 15. A probe 9 with a length greater than 300 mm is inserted and tightened. The seal adopts a conical hard seal structure, which can withstand a pressure of more than 70 MPa. The temperature sensor 7 is then installed with the thread on the upper part of the probe, and the sensor signal line is led out from the axial end face of the combination valve to connect the signal terminal. The probe 9 is hollow, and the temperature sensor 7 is installed inside. The probe 9 and the temperature sensor 7 are connected by threads. The probe 9 is installed on the combination valve once, sealed with the combination valve as a whole, and then installed on the high-pressure gas cylinder 8. The temperature sensor 7 can be repaired and replaced at any time. Such a structure not only solves the problem of accurate temperature measurement of the temperature sensor 7, but also ensures the problem of online repair and replacement.

[0051] The above embodiments are only used to explain the technical solution of the utility model rather than to limit it. Those skilled in the art should understand that any modification and equivalent substitution that does not deviate from the spirit and scope of the utility model should fall within the scope of protection of the claims of the utility model.

Claims

1. A high-pressure gas cylinder combination valve with accurate temperature sensing function, installed at the mouth of the high-pressure gas cylinder, characterized in that: include: A valve body, the valve body is installed on the bottle mouth of the high-pressure gas cylinder, a temperature sensing channel is provided through the valve body, and the temperature sensing channel is connected to the high-pressure gas cylinder; a gas cylinder to stop valve channel and a hydrogen filling and supply channel are provided on the valve body, the gas cylinder to stop valve channel is connected to the hydrogen filling and supply channel, and the hydrogen filling and supply channel is connected to the high-pressure gas cylinder; A temperature sensor, the temperature sensor being installed in the temperature sensing channel and being used to detect the internal temperature of the high-pressure gas cylinder; The probe is installed in the temperature sensing channel, the temperature sensor is installed in the probe, and the probe is inserted into the gas cylinder at 100mm-350mm.

2. A high-pressure gas cylinder combination valve with accurate temperature sensing function according to claim 1, characterized in that: An external thread section is arranged at the upper end of the probe, an internal thread section is arranged at the upper end of the temperature sensing channel, and the probe is threadedly connected to the temperature sensing channel.

3. A high-pressure gas cylinder combination valve with accurate temperature sensing function according to claim 1, characterized in that: The model of the temperature sensor is PT100 or PT1000.

4. A high-pressure gas cylinder with accurate temperature sensing function, characterized in that: A high-pressure gas cylinder combination valve with a precise temperature sensing function as claimed in any one of claims 1 to 3 is installed at the bottle mouth of the high-pressure gas cylinder.

Images