High-pressure low-pressure three-way automatic valve
By designing a high-pressure and low-pressure three-way automatic valve, and using solenoid valves and check valves to achieve safe switching between high and low pressure gas sources, the problem of damage to the low-pressure system during CNG and LNG switching is solved, and the safety and applicability of the system are improved.
Patent Information
- Application Number
- CN202520704072.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-15
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-04-15
AI Technical Summary
In the existing technology, the uneven distribution of CNG and LNG refueling stations makes it easy to damage the low-pressure system when switching between high-pressure CNG and low-pressure LNG. In addition, ordinary three-way valves cannot safely switch between high-pressure and low-pressure gas sources, affecting the safety and stability of the low-pressure system.
Design a high-pressure and low-pressure three-way automatic valve, comprising a three-way valve body, a check valve, and a solenoid valve. The solenoid valve controls the gas flow, and a check valve is installed at the high-pressure and low-pressure input ends to achieve safe switching.
It enables safe switching between high-pressure and low-pressure gas sources without altering low-pressure system parameters. The structure is simple, easy to operate, and improves the safety and applicability of the system.
Smart Images
Figure CN223895131U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of valve technology, and in particular to a high-pressure and low-pressure three-way automatic valve. Background Technology
[0002] CNG and LNG are common forms of natural gas. CNG has lower production, transportation, and storage costs, while LNG has higher costs due to its cryogenic liquefaction and storage / transport requirements. Prices for both fluctuate significantly across different regions and time periods, but LNG offers better range and is suitable for long-distance transportation. However, in practical applications, LNG and CNG refueling stations are unevenly distributed, necessitating a system compatible with both. In such systems, CNG pressures exceed 20 MPa, while LNG outputs only around 1 MPa. Directly using a T-junction would damage the LNG storage system due to the high pressure of CNG. Furthermore, in certain industries where high-pressure and low-pressure gas sources are used alternately, ordinary T-junctions can damage low-pressure pipelines. Moreover, existing low-pressure systems are designed for low-pressure environments and their parameters cannot be easily modified. Therefore, there is an urgent need to develop a valve that can be directly installed without altering low-pressure system parameters, safely switching between high-pressure and low-pressure gas sources. Utility Model Content
[0003] The purpose of this invention is to provide a high-pressure and low-pressure three-way automatic valve to solve the problems mentioned in the background art.
[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a high-pressure and low-pressure three-way automatic valve, including a three-way valve body, an output connector fixedly connected to the output end of the three-way valve body, a first input connector fixedly connected to one of the input ends of the three-way valve body, a second input connector fixedly connected to the other input end, and a one-way valve installed in both the first input connector and the second input connector. A solenoid valve is fixedly connected to the three-way valve body, and the output end of the solenoid valve is located in the three-way valve body.
[0005] Preferably, the three-way valve body has an air outlet at the position corresponding to the output connector, and the output connector is threaded into the air outlet. The three-way valve body has a second mounting hole at the position corresponding to the first input connector, and the first input connector is threaded into the second mounting hole. The three-way valve body has a third mounting hole at the position corresponding to the second input connector, and the second input connector is threaded into the third mounting hole.
[0006] Preferably, a first mounting hole is provided on the three-way valve body at the position corresponding to the solenoid valve, and the solenoid valve is threaded into the first mounting hole, and the first mounting hole is conductively connected to the third mounting hole.
[0007] Preferably, a flow channel is conductively connected in the first mounting hole, and the other end of the flow channel is conductively connected in the second mounting hole, and the output end of the flow channel is conductively connected to the input end of the air outlet.
[0008] Preferably, the one-way valve includes a valve core, a groove, a sealing ring, a mounting groove, a spring, a baffle, a through hole, and a fixing sleeve. The valve core is slidably connected to both the first input connector and the second input connector. The valve core has a mounting groove, and a spring is sleeved in the mounting groove. A baffle is provided on one side of the valve core, and one end of the spring is provided on the baffle and the other end is provided in the mounting groove. A fixing sleeve is fixedly connected to the baffle and is provided in the three-way valve body.
[0009] Preferably, the valve core has a groove, and a sealing ring is fitted inside the groove.
[0010] Preferably, the baffle has multiple through holes evenly distributed on it.
[0011] This utility model provides a high-pressure and low-pressure three-way automatic valve, the advantages of which are: this utility model adds a solenoid valve to the three-way valve body to control the opening and closing of the high-pressure gas input end, and adds a one-way valve to both the high-pressure gas input end and the low-pressure gas input end of the three-way valve body, which can be directly installed and used in low-pressure systems, and can realize the safe switching between high-pressure and low-pressure gas sources without modifying the low-pressure system parameters. This utility model has the advantages of simple structure and easy operation, has good practicality, and is conducive to promoting the efficient use of clean energy. Attached Figure Description
[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0013] Figure 1 This is a schematic diagram of the overall front view section structure of this utility model in its initial state;
[0014] Figure 2 for Figure 1 Enlarged view of the structure of region A in the middle;
[0015] Figure 3 This is a schematic diagram of the overall front view section structure of this utility model under high pressure.
[0016] Figure 4 This is a schematic diagram of the overall front view cross-section structure of this utility model under low pressure.
[0017] In the diagram: 1. Three-way valve body; 11. Flow channel; 12. First mounting hole; 13. Second mounting hole; 14. Third mounting hole; 15. Air outlet; 2. Solenoid valve; 3. First input connector; 4. Second input connector; 5. Output connector; 6. Check valve; 61. Valve core; 62. Groove; 63. Sealing ring; 64. Mounting groove; 65. Spring; 66. Baffle; 67. Through hole; 68. Fixing sleeve. Detailed Implementation
[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0019] Please see the appendix Figure 1 - Appendix Figure 4This utility model provides an embodiment of a high-pressure and low-pressure three-way automatic valve, comprising a three-way valve body 1, an output connector 5 fixedly connected to the output end of the three-way valve body 1, a first input connector 3 fixedly connected to one of the input ends of the three-way valve body 1, and a second input connector 4 fixedly connected to the other input end. Both the first input connector 3 and the second input connector 4 are equipped with check valves 6. A solenoid valve 2 is fixedly connected to the three-way valve body 1, and the output end of the solenoid valve 2 is located within the three-way valve body 1. The output connector 5 is used to output gas, the first input connector 3 is used to input low-pressure gas, the second input connector 4 is used to input high-pressure gas, the check valve 6 is used to ensure unidirectional gas flow, and the solenoid valve 2 is used to switch the working state of the three-way valve body 1. An air outlet 15 is provided at the position corresponding to the output connector 5, and the output connector 5 is threaded into the air outlet 15. A second mounting hole 13 is provided at the position corresponding to the first input connector 3, and the first input connector 3 is threaded into the second mounting hole 13. A third mounting hole 14 is provided at the position corresponding to the second input connector 4, and the second input connector 4 is threaded into the third mounting hole 14. The air outlet 15 is used to install the output connector 5, the first mounting hole 12 is used to install the solenoid valve 2, the second mounting hole 13 is used to install the first input connector 3, and the third mounting hole 14 is used to install the second input connector 4. A first mounting hole 12 is provided at the position corresponding to the solenoid valve 2, and the solenoid valve 2 is threaded into the third mounting hole 14. The first mounting hole 12 is connected to the third mounting hole 14. The first mounting hole 12 is used to install the solenoid valve 2. A flow channel 11 is connected to the first mounting hole 12, and the other end of the flow channel 11 is connected to the second mounting hole 13. The output end of the flow channel 11 is connected to the input end of the air outlet 15. The first mounting hole 12 connects the flow channel 11 and the third mounting hole 14. The flow channel 11 is used to deliver gas to the air outlet 15. The one-way valve 6 includes a valve core 61, a groove 62, a sealing ring 63, a mounting groove 64, a spring 65, a baffle 66, a through hole 67, and a fixing sleeve 68. The valve core 61 is slidably connected to both the first input connector 3 and the second input connector 4. The valve core 61 has a mounting groove 64. A spring 65 is fitted inside the valve core 61. A baffle 66 is provided on one side of the valve core 61, and one end of the spring 65 is set on the baffle 66, while the other end is set in the mounting groove 64. A fixing sleeve 68 is fixedly connected to the baffle 66 and is set inside the three-way valve body 1. The mounting groove 64 is used to install the spring 65, and the fixing sleeve 68 is used to install the baffle 66. The baffle 66 is used to limit the spring 65, and the spring 65 is used to provide elastic force to the valve core 61. The valve core 61 is used to cut off the gas supply. A groove 62 is opened on the valve core 61, and a sealing ring 63 is fitted inside the groove 62. The groove 62 is used to install the sealing ring 63, and the sealing ring 63 is used to improve the sealing performance of the valve core 61. Multiple through holes 67 are evenly distributed on the baffle 66, and the through holes 67 are used for gas flow.
[0020] Working Principle: When using this invention, low-pressure gas is input into the first input connector 3 and high-pressure gas is input into the second input connector 4. The gas overcomes the elastic force of the spring 65, causing the valve core 61 to open. Both the one-way valves 6 in the first input connector 3 and the second input connector 4 are in the conducting state. In the initial state, the output end of the solenoid valve 2 blocks one end of the flow channel 11. The high-pressure gas is delivered to the output end of the solenoid valve 2 and blocked, while the low-pressure gas enters the outlet 15 through the other end of the flow channel 11. Therefore, the output connector 5 outputs low-pressure gas. When the solenoid valve 2 is energized and opened, the output end of the solenoid valve 2 retracts, and the high-pressure gas enters the flow channel 11, entering a high-pressure state. Since the pressure of the high-pressure gas is higher than that of the low-pressure gas, the one-way valve 6 in the first input connector 3 closes under the elastic force of the spring 65, cutting off the input of low-pressure gas. As the high-pressure gas is input, the pressure gradually increases, acting as... The pressure applied to the one-way valve 6 in the first input connector 3 creates a pressure difference with the low-pressure gas, causing the one-way valve 6 to close more tightly. At this time, the output connector 5 outputs high-pressure gas, and the three-way valve body 1 is in a high-pressure state. As the high-pressure gas is used and consumed, the high-pressure pressure gradually drops to the low-pressure storage system pressure. This time, the low-pressure gas overcomes the elastic force of the spring 65, the one-way valve 6 in the first input connector 3 opens, the output connector 5 outputs low-pressure gas, and the three-way valve body 1 is in a low-pressure state. Among them, the first mounting hole 12 is used to install the solenoid valve 2, the second mounting hole 13 is used to install the first input connector 3, the third mounting hole 14 is used to install the second input connector 4, the groove 62 is used to install the sealing ring 63, the sealing ring 63 is used to improve the sealing performance of the valve core 61, the mounting groove 64 is used to install the spring 65, the baffle 66 is used to limit the spring 65, the through hole 67 is used for gas flow, and the fixing sleeve 68 is used to install the baffle 66.
[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0022] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.
[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.
Claims
1. A high-pressure and low-pressure three-way automatic valve, comprising a three-way valve body (1), characterized in that: The output end of the three-way valve body (1) is connected to and fixed with an output connector (5). One of the input ends of the three-way valve body (1) is connected to and fixed with a first input connector (3), and the other input end is connected to and fixed with a second input connector (4). A one-way valve (6) is installed in both the first input connector (3) and the second input connector (4). A solenoid valve (2) is fixedly connected to the three-way valve body (1), and the output end of the solenoid valve (2) is located inside the three-way valve body (1).
2. The high-pressure and low-pressure three-way automatic valve according to claim 1, characterized in that: The three-way valve body (1) has an air outlet (15) at the position corresponding to the output connector (5), and the output connector (5) is threaded into the air outlet (15). The three-way valve body (1) has a second mounting hole (13) at the position corresponding to the first input connector (3), and the first input connector (3) is threaded into the second mounting hole (13). The three-way valve body (1) has a third mounting hole (14) at the position corresponding to the second input connector (4), and the second input connector (4) is threaded into the third mounting hole (14).
3. The high-pressure and low-pressure three-way automatic valve according to claim 1, characterized in that: The three-way valve body (1) has a first mounting hole (12) at the position corresponding to the solenoid valve (2), and the solenoid valve (2) is threaded into the first mounting hole (12), and the first mounting hole (12) is conductively connected to the third mounting hole (14).
4. The high-pressure and low-pressure three-way automatic valve according to claim 3, characterized in that: The first mounting hole (12) is connected to a flow channel (11), and the other end of the flow channel (11) is connected to the second mounting hole (13). The output end of the flow channel (11) is connected to the input end of the air outlet (15).
5. A high-pressure and low-pressure three-way automatic valve according to claim 1, characterized in that: The one-way valve (6) includes a valve core (61), a groove (62), a sealing ring (63), a mounting groove (64), a spring (65), a baffle (66), a through hole (67), and a fixing sleeve (68). The valve core (61) is slidably connected to both the first input connector (3) and the second input connector (4). The valve core (61) has a mounting groove (64) and a spring (65) is sleeved in the mounting groove (64). A baffle (66) is provided on one side of the valve core (61), and one end of the spring (65) is provided on the baffle (66) and the other end is provided in the mounting groove (64). A fixing sleeve (68) is fixedly connected to the baffle (66) and is provided in the three-way valve body (1).
6. A high-pressure and low-pressure three-way automatic valve according to claim 5, characterized in that: The valve core (61) has a groove (62) and a sealing ring (63) is fitted inside the groove (62).
7. A high-pressure and low-pressure three-way automatic valve according to claim 5, characterized in that: The baffle (66) has multiple through holes (67) evenly distributed on it.