Pressure reducing valve and gas internal combustion engine circulation system

Abstract

The utility model discloses a pressure reducing valve and a gas internal combustion engine circulating system, and relates to the technical field of pressure reducing valves. The pressure reducing valve comprises a main valve body and a main valve element. The main valve body is provided with an air inlet cavity and an air outlet cavity, and the air inlet cavity communicates with the air outlet cavity. The main valve element is installed in the main valve body in a sliding mode, and when the main valve element slides to the first partition position, the air inlet cavity and the air outlet cavity are partitioned. A hot water flow channel is arranged on the portion, adjacent to the main valve element, of the main valve body and provided with a liquid inlet connector and a liquid outlet connector. Compared with the prior art, the pressure reducing valve and the gas internal combustion engine circulating system can reduce energy consumption, cost and fault rate.

Description

Technical Field

[0001] This utility model relates to the field of pressure reducing valve technology, and in particular to a pressure reducing valve that can prevent the valve core from freezing and a gas internal combustion engine circulation system. Background Technology

[0002] A pressure reducing valve is a valve that reduces the inlet pressure to a desired outlet pressure by adjusting the inlet pressure and automatically maintains a stable outlet pressure by relying on the energy of the medium itself. From a fluid mechanics perspective, a pressure reducing valve is a throttling element with variable local resistance. That is, by changing the throttling area, the flow velocity and kinetic energy of the fluid are altered, resulting in different pressure losses, thereby achieving pressure reduction. Then, through the regulation of the control and adjustment system, the pressure fluctuations downstream of the valve are balanced with the spring force, keeping the downstream pressure constant within a certain error range. After pressure reduction, the fluid expands and absorbs heat, lowering the temperature of the valve core and other parts. When the temperature drops below zero degrees Celsius, water vapor contained in the gas condenses on the valve core and other parts, causing frost to form and freezing, affecting gas flow and the normal operation of the pressure reducing valve.

[0003] Existing technologies primarily employ dedicated electric heating devices to heat the intake pipe, raising the temperature of the gas within it. This prevents the gas temperature flowing through the pressure reducing valve from dropping below zero degrees Celsius, thus preventing the valve core from frostling and freezing. Temperature control within the intake pipe is achieved by adjusting the heating power of the heating device. The main drawbacks of this approach are the high energy consumption, cost, and failure rate of the electric heating device. Utility Model Content

[0004] The purpose of this invention is to provide a pressure reducing valve and a gas internal combustion engine circulation system to solve the problems existing in the above-mentioned related technologies and reduce energy consumption, cost and failure rate.

[0005] To achieve the above objectives, this utility model provides the following solution:

[0006] This utility model discloses a pressure reducing valve, including a main valve body and a main valve core; the main valve body has an air inlet chamber and an air outlet chamber, the air inlet chamber being connected to the air outlet chamber; the main valve core is slidably installed in the main valve body, and when it slides to the first isolation position, it isolates the air inlet chamber from the air outlet chamber;

[0007] The main valve body is provided with a hot water flow channel adjacent to the main valve core, and the hot water flow channel has an inlet connector and an outlet connector.

[0008] Preferably, the hot water flow channel is formed by an annular groove and a main valve core seat; the annular groove is formed on the inner surface of the main valve body, and the groove opening is located on its radial inner side; the main valve core seat is fixedly connected to the main valve body, and its outer side closes the groove opening of the annular groove; the main valve core is in sealed contact with the main valve core seat when it is in the first isolation position.

[0009] Preferably, the main valve core and the main valve core seat have conical surfaces with the same taper, and the two conical surfaces fit together when the main valve core slides to the first partition position.

[0010] Preferably, a pressure sensor is fixedly connected to the air outlet chamber, and the pressure sensor is used to detect the internal pressure of the air outlet chamber.

[0011] Preferably, along the sliding direction of the main valve core, the main valve body has an opening one and an opening two at its two ends respectively; the opening one communicates with the air inlet chamber, and the opening two communicates with the air outlet chamber; a bottom cover is fixedly connected to the opening one, and a main valve spring is provided between the bottom cover and the main valve core, the main valve spring being used to provide elastic force to push the main valve core towards the first partition position; a guide valve seat is fixedly connected to the opening two, and a piston sleeve is installed between the guide valve seat and the main valve body; a piston is slidably installed inside the piston sleeve, and the piston is fixedly connected to the main valve core;

[0012] Inside the piston sleeve, the cavity on one side of the piston is connected to the outlet chamber through a through hole provided on the piston sleeve, and the cavity on the other side of the piston is connected to the inlet chamber through an inlet passage, so that the gas flowing in from the inlet chamber provides a thrust to push the main valve core toward the main valve spring; the inlet passage passes through the main valve body and the guide valve seat;

[0013] A valve core is slidably mounted inside the valve seat; when the valve core slides to the second isolation position, it isolates the air intake passage; a valve spring is provided on one side of the valve core; the valve spring is located between the valve seat and the valve core, and is used to provide an elastic force to push the valve core to the second isolation position; a pushing assembly is provided on the other side of the valve core, and is used to provide a thrust to push the valve core towards the valve spring.

[0014] Preferably, the piston sleeve has a guide hole for slidingly guiding the main valve core.

[0015] Preferably, a valve core seat is fixedly connected inside the valve core seat, and the valve core is in sealing contact with the valve core seat when it is in the second isolation position.

[0016] Preferably, the pilot valve core and the pilot valve core seat have conical surfaces with the same taper, and the two conical surfaces fit together when the pilot valve core slides to the second partition position.

[0017] Preferably, the regulating valve seat is fixedly connected to the pilot valve seat and is located on the side of the pilot valve core away from the pilot valve spring;

[0018] The diaphragm is clamped between the regulating valve seat and the pilot valve seat;

[0019] An adjusting spring base, located inside the adjusting valve seat, is used to press the diaphragm against the pilot valve core;

[0020] An adjusting spring, located on the side of the adjusting spring base opposite to the diaphragm, is used to provide an elastic thrust that presses the adjusting spring base against the diaphragm;

[0021] An adjusting screw, threadedly connected to the adjusting valve seat, is used to provide thrust to the end of the adjusting spring that is away from the adjusting spring base;

[0022] An adjusting screw cap is threadedly connected to the adjusting seat, and covers the portion of the adjusting screw that extends out of the adjusting valve seat.

[0023] Within the valve seat, the cavity located on the side of the diaphragm away from the regulating valve seat is connected to the outlet cavity via an inlet air passage two, which is independent of the inlet air passage one.

[0024] This utility model also discloses a gas internal combustion engine circulation system, including the aforementioned pressure reducing valve, as well as a gas internal combustion engine, a radiator, and a gas storage cylinder;

[0025] The outlet of the radiator is connected to the inlet of the gas internal combustion engine through a pipeline, the outlet of the gas internal combustion engine is connected to the inlet connector of the pressure reducing valve through a pipeline, and the outlet connector of the pressure reducing valve is connected to the inlet of the radiator through a pipeline.

[0026] The outlet of the gas storage cylinder is connected to the inlet chamber of the pressure reducing valve through a pipeline, and the outlet chamber of the pressure reducing valve is connected to the inlet of the gas internal combustion engine through a pipeline.

[0027] This utility model achieves the following technical advantages compared to related technologies:

[0028] This invention continuously supplies hot water to the main valve core and its surrounding area through a hot water flow channel, preventing the main valve core from freezing. Firstly, this structure eliminates the need for a heating circuit, avoiding circuit malfunctions and ensuring a stable heat supply. Secondly, the hot water used in this structure can be circulating water from a cooling system that has absorbed heat, thereby reducing energy consumption.

[0029] In a preferred embodiment of this invention, a pressure sensor is fixedly connected to the outlet chamber, and the pressure sensor is used to detect the internal pressure of the outlet chamber. Real-time detection by the pressure sensor facilitates determination of whether the pressure reducing valve is functioning correctly. When the pressure reducing valve is a pressure reducing valve in the gas supply system of a gas internal combustion engine, the pressure sensor can be electrically connected to the control unit of the gas internal combustion engine, transmitting the detection signal to the control unit in real time so that the gas internal combustion engine can adjust its operating conditions according to the gas pressure. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or related technologies, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of a pressure reducing valve in one of the embodiments of this utility model;

[0032] Figure 2 This is a schematic diagram showing the locations of the inlet connector, outlet connector, and pressure sensor in some examples of embodiments of this utility model;

[0033] Figure 3 This is a schematic diagram of a gas-fired internal combustion engine circulation system in one of the embodiments of this utility model.

[0034] In the diagram: 1. Main valve body; 2. Bottom cover; 3. Main valve spring; 4. Main valve core seat; 5. Main valve core; 6. Piston sleeve; 7. Piston; 8. Pilot valve seat; 9. Pilot valve spring; 10. Pilot valve core seat; 11. Pilot valve rod seat; 12. Pilot valve core; 13. Diaphragm; 14. Adjusting spring base; 15. Adjusting spring; 16. Adjusting screw; 17. Adjusting valve seat; 18. Adjusting screw cap; 19. Inlet connector; 20. Outlet connector; 21. Pressure sensor; 22. Gas cylinder; 23. High-pressure filter; 24. Pressure reducing valve; 25. Low-pressure filter; 26. Gas internal combustion engine; 27. Radiator; A1. Inlet chamber; A2. Outlet chamber; B1. Front section of inlet air passage one; B2. Rear section of inlet air passage one; B3. Second inlet air passage; C. Hot water flow channel. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] The purpose of this invention is to provide a pressure reducing valve and a gas internal combustion engine circulation system to solve the problems existing in the above-mentioned related technologies and reduce energy consumption, cost and failure rate.

[0037] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] Reference Figures 1-3 This embodiment provides a pressure reducing valve 24, including a main valve body 1 and a main valve core 5. The main valve body 1 has an inlet chamber A1 and an outlet chamber A2, with the inlet chamber A1 communicating with the outlet chamber A2. The main valve core 5 is slidably installed within the main valve body 1, and when slid to the first isolation position, it isolates the inlet chamber A1 from the outlet chamber A2. A hot water flow channel C is provided on the main valve body 1 adjacent to the main valve core 5, and the hot water flow channel C has an inlet connector 19 and an outlet connector 20.

[0039] The working principle of the pressure reducing valve 24 in this embodiment is as follows:

[0040] When the main valve core 5 is in the first isolation position, it isolates the inlet chamber A1 from the outlet chamber A2. When the main valve core 5 is not in the first isolation position, the inlet chamber A1 and the outlet chamber A2 are connected. After the high-pressure gas enters the inlet chamber A1, it passes through the main valve core 5 and flows to the outlet chamber A2. Due to the throttling effect of the main valve core 5, a pressure loss occurs when the gas flows through the main valve core 5, and the pressure in the outlet chamber A2 is lower than the pressure in the inlet chamber A1. The depressurized gas expands and absorbs heat, lowering the temperature near the main valve core 5.

[0041] The inlet connector 19 is used to introduce hot water into the hot water flow channel C. The hot water flows along the hot water flow channel C to the part of the main valve body 1 adjacent to the main valve core 5, heating the main valve core 5 and a local area of ​​the main valve body 1 near the main valve core 5, preventing the main valve core 5 from freezing onto the main valve body 1. After releasing heat, the hot water cools down and flows out of the hot water flow channel C through the outlet connector 20.

[0042] By continuously supplying hot water into the hot water flow channel C, heat can be continuously provided to the main valve core 5 and its surrounding area, preventing the main valve core 5 from freezing.

[0043] On the one hand, the above structure eliminates the need for a heating circuit, avoiding circuit failures and ensuring a stable heat supply. On the other hand, the hot water used in the above structure can be circulating water from a cooling system that has absorbed heat, thereby reducing energy consumption.

[0044] For example, the pressure reducing valve 24 can be used in the gas supply system of a gas-fired internal combustion engine 26 used in the automotive or aviation fields to pass circulating water for the circulating cooling of the gas-fired internal combustion engine 26 into the hot water flow channel C.

[0045] In some examples, the hot water flow channel C is formed by an annular groove and a main valve core seat 4. The annular groove is formed on the inner surface of the main valve body 1, and the groove opening is located radially inward. The main valve core seat 4 is fixedly connected to the main valve body 1, and its outer surface closes the groove opening of the annular groove. The main valve core 5 is in sealing contact with the main valve core seat 4 in the first isolation position.

[0046] The main valve core seat 4 and the main valve body 1 can be fitted with an interference fit to ensure the sealing of the hot water flow channel C. The force exerted by the water in the hot water flow channel C on the main valve core seat 4 is a radial force rather than an axial force, which prevents the main valve core seat 4 from separating from the main valve body 1 under the action of axial force.

[0047] The main valve core seat 4, as the component that contacts the main valve core 5, separates the main valve body 1 from the main valve core 5, preventing damage to the main valve body 1 due to collisions with the main valve core 5. The main valve core seat 4 can be replaced after a period of use, reducing maintenance costs.

[0048] In some examples, the main valve core 5 and the main valve core seat 4 have conical surfaces with the same taper. The two conical surfaces fit together when the main valve core 5 slides to the first partition position, which increases the contact area and improves the sealing performance.

[0049] In some examples, the main valve core seat 4 includes a cylinder and an annular plate, one end of which is connected to the inner edge of the annular plate. The connection between the two is provided with a chamfered transition structure, and the inclined surface on the main valve core seat 4 for contacting the main valve core 5 is provided by the chamfered transition structure.

[0050] In some examples, a pressure sensor 21 is fixedly connected to the air outlet chamber A2, and the pressure sensor 21 is used to detect the internal pressure of the air outlet chamber A2.

[0051] The real-time detection by pressure sensor 21 makes it easy to determine whether the working status of pressure reducing valve 24 is normal.

[0052] When the pressure reducing valve 24 is the pressure reducing valve 24 in the gas supply system of the gas internal combustion engine 26, the pressure sensor 21 can be electrically connected to the control unit of the gas internal combustion engine 26 to transmit the detection signal to the control unit of the gas internal combustion engine 26 in real time, so that the control unit of the gas internal combustion engine 26 can adjust the operating conditions according to the gas pressure.

[0053] In some examples, along the sliding direction of the main valve core 5, the main valve body 1 has an opening 1 and an opening 2 at both ends. Opening 1 connects to the air inlet chamber A1, and opening 2 connects to the air outlet chamber A2. A bottom cover 2 is fixedly connected to opening 1, and a main valve spring 3 is provided between the bottom cover 2 and the main valve core 5. The main valve spring 3 is used to provide the elastic force to push the main valve core 5 to the first isolation position. A pilot valve seat 8 is fixedly connected to opening 2, and a piston sleeve 6 is installed between the pilot valve seat 8 and the main valve body 1. A piston 7 is slidably installed inside the piston sleeve 6, and the piston 7 is fixedly connected to the main valve core 5.

[0054] Figure 1 In this design, the sliding direction of the main valve core 5 and the piston 7 is vertical. The pressure difference between the upper and lower sides of the piston 7 provides a force that is transmitted to the main valve core 5 via the piston 7, and this force is directed downwards. The main valve spring 3 provides the elastic force to push the main valve core 5 upwards. Both the lower end of the main valve core 5 and the upper end of the bottom cover 2 have protrusions that extend into the inside of the main valve spring 3 to provide radial positioning for the main valve spring 3, preventing it from dislodging from its installation position under the impact of airflow. The connection between the bottom cover 2 and the main valve body 1 can be a threaded connection.

[0055] The cavity located on one side of the piston 7 inside the piston sleeve 6. Figure 1 The lower side of piston 7 is connected to the exhaust chamber A2 through a through hole provided on piston sleeve 6, and the cavity located on the other side of piston 7 ( Figure 1 The piston 7 (located on its upper side) is connected to the intake chamber A1 via an intake passage, so that the gas flowing into the intake chamber A1 provides the thrust to push the main valve core 5 toward the main valve spring 3. The intake passage passes through the main valve body 1 and the pilot valve seat 8.

[0056] Figure 1 In the process, when the pressure difference between the intake chamber A1 and the outlet chamber A2 is large, the piston 7 experiences a larger downward thrust, causing the main valve core 5 to open more fully, thereby increasing the flow area and reducing the pressure difference between the intake chamber A1 and the outlet chamber A2. When the pressure difference between the intake chamber A1 and the outlet chamber A2 is small, the piston 7 experiences a smaller downward thrust, causing the main valve core 5 to open less fully, thereby reducing the flow area and increasing the pressure difference between the intake chamber A1 and the outlet chamber A2. Through the up-and-down movement of the main valve core 5, the pressure difference between the intake chamber A1 and the outlet chamber A2 fluctuates within a certain range, maintaining relative stability.

[0057] A pilot valve core 12 is slidably mounted within the pilot valve seat 8. When the pilot valve core 12 slides to the second isolation position, it isolates the air intake passage. A pilot valve spring 9 is provided on one side of the pilot valve core 12. The pilot valve spring 9 is located between the pilot valve seat 8 and the pilot valve core 12, and is used to provide a spring force to push the pilot valve core 12 to the second isolation position. A push assembly is provided on the other side of the pilot valve core 12, which is used to provide a thrust force to push the pilot valve core 12 to the pilot valve spring 9.

[0058] Figure 1 In this configuration, the sliding direction of the pilot valve core 12 is up and down. The gas pressure on the upper side of the piston 7 is not the gas pressure in the intake chamber A1, but the gas pressure after being throttled and reduced by the pilot valve core 12.

[0059] In some examples, a sealing ring is installed between the mating surfaces of the piston 7 and the piston sleeve 6, and the outer side of the piston 7 is provided with a mounting groove for installing the sealing ring.

[0060] The above structure can avoid Figure 1 High-pressure gas leaks from the upper side of piston 7 to the lower side of piston 7.

[0061] In some examples, the piston sleeve 6 has a guide hole for sliding guidance of the main valve core 5.

[0062] That is, the piston sleeve 6 not only guides the piston 7 in the vertical direction, but also guides the main valve core 5 in the vertical direction, so as to prevent the main valve core 5 from tilting under the impact of airflow.

[0063] In some examples, a pilot valve core seat 10 is fixedly connected inside the pilot valve seat 8, and the pilot valve core 12 is in sealing contact with the pilot valve core seat 10 when in the second isolation position.

[0064] The connection between the pilot valve core seat 10 and the pilot valve seat 8 can be a threaded connection to facilitate installation and disassembly.

[0065] In some examples, the pilot valve core 12 and the pilot valve core seat 10 have the same conical surface with the same taper. The two conical surfaces fit together when the pilot valve core 12 slides to the second partition position, which increases the contact area and improves the sealing performance.

[0066] Figure 1 In the middle, the first isolation position is the limit position when the main valve core 5 slides upward, and the second isolation position is the limit position when the pilot valve core 12 slides upward.

[0067] In some examples, a pilot valve stem seat 11 is fixedly connected inside the pilot valve seat 8, and the pilot valve core 12 includes a stem portion and a throttling portion connected to the lower end of the stem portion. The stem portion is slidably engaged with the pilot valve stem seat 11. The throttling portion is separably abutting against the pilot valve core seat 10, and the conical surface on the pilot valve core 12 for contacting the pilot valve core seat 10 is located on the throttling portion.

[0068] The valve stem seat 11 guides the up-and-down sliding of the valve core 12. The valve stem seat 11 and the valve seat 8 can be connected by a threaded connection for easy installation and disassembly.

[0069] In some examples, the actuating components include an adjusting valve seat 17, a diaphragm 13, an adjusting spring base 14, an adjusting spring 15, an adjusting screw 16, and an adjusting screw cap 18.

[0070] The regulating valve seat 17 is fixedly connected to the pilot valve seat 8, and the regulating valve seat 17 is located on the side of the pilot valve core 12 away from the pilot valve spring 9. The diaphragm 13 is sandwiched between the regulating valve seat 17 and the pilot valve seat 8. The regulating spring base 14 is located inside the regulating valve seat 17 and is used to press the diaphragm 13 into the pilot valve core 12. The regulating spring 15 is located on the side of the regulating spring base 14 away from the diaphragm 13 and is used to provide an elastic thrust that presses the regulating spring base 14 against the diaphragm 13. The regulating screw 16 is threadedly connected to the regulating valve seat 17 and is used to provide thrust to the end of the regulating spring 15 away from the regulating spring base 14. The regulating screw cap 18 is threadedly connected to the regulating seat and covers the part of the regulating screw 16 that protrudes from the regulating valve seat 17. Among them, in the pilot valve seat 8, the cavity on the side of the diaphragm 13 away from the regulating valve seat 17 is connected to the outlet chamber A2 through the second inlet air passage B3, and the second inlet air passage B3 is independent of the first inlet air passage.

[0071] Rotating the adjusting screw 16 causes it to move downward, increasing the compression of the adjusting spring 15. This results in the adjusting spring base 14, diaphragm 13, and pilot valve core 12 being subjected to greater downward pressure. The downward movement of the pilot valve core 12 increases the compression of the pilot valve spring 9, increases the flow area of ​​the inlet air passage 1, reduces the throttling effect of the pilot valve core 12, increases the pressure on the upper side of the piston 7, and causes the piston 7 and main valve core 5 to move downward.

[0072] When the pressure in the outlet chamber A2 increases abnormally, the outlet chamber A2 is connected to the cavity below the diaphragm 13 through the inlet passage B3, which increases the upward force on the diaphragm 13, thereby reducing the downward force exerted by the diaphragm 13 on the pilot valve core 12. At this time, the pilot valve core 12 moves upward under the thrust of the pilot valve spring 9, the flow area of ​​the inlet passage one decreases, the throttling effect of the pilot valve core 12 increases, the pressure on the upper side of the piston 7 decreases, and the piston 7 and the main valve core 5 move upward.

[0073] The gas in the upper cavity of the diaphragm 13 is connected to the atmosphere, and the function of the adjusting screw cap 18 is to protect the adjusting screw 16 from external interference during operation.

[0074] Reference Figure 1 In the first intake air passage, the portion upstream of the pilot valve core 12 is called the first intake air passage front section B1, and the portion downstream of the pilot valve core 12 is called the first intake air passage rear section B2. A portion of the first intake air passage front section B1 is located in the main valve body 1, and another portion is located in the pilot valve seat 8. The entire first intake air passage rear section B2 is located in the pilot valve seat 8. A portion of the second intake air passage B3 is located in the main valve body 1, and another portion is located in the pilot valve seat 8.

[0075] Reference Figure 3 This embodiment also provides a gas internal combustion engine circulation system, including the pressure reducing valve 24 mentioned above, as well as a gas internal combustion engine 26, a radiator 27 and a gas storage cylinder 22.

[0076] The outlet of the radiator 27 is connected to the inlet of the gas internal combustion engine 26 through a pipeline. The outlet of the gas internal combustion engine 26 is connected to the inlet connector 19 of the pressure reducing valve 24 through a pipeline. The outlet connector 20 of the pressure reducing valve 24 is connected to the inlet of the radiator 27 through a pipeline.

[0077] The outlet of the gas cylinder 22 is connected to the inlet chamber A1 of the pressure reducing valve 24 through a pipeline, and the outlet chamber A2 of the pressure reducing valve 24 is connected to the inlet of the gas internal combustion engine 26 through a pipeline.

[0078] The fuel gas stored in the gas cylinder 22 is pressure-reduced by the pressure reducing valve 24 and then delivered to the gas internal combustion engine 26, where it is burned to provide energy. The water output from the radiator 27 absorbs heat and rises in temperature after flowing through the gas internal combustion engine 26, and then flows through the hot water channel C of the pressure reducing valve 24, where it releases heat and cools down before flowing back to the radiator 27.

[0079] Figure 3 In the diagram, the arrow indicates the direction of gas or liquid flow. The above process transfers excess heat from the gas internal combustion engine 26 to the vicinity of the main valve core 5 of the pressure reducing valve 24 via circulating water, enabling local utilization of heat, reducing energy waste, and avoiding the problems of high energy consumption, cost, and failure rate associated with the electric heating device inside the pressure reducing valve 24.

[0080] In some examples, a high-pressure filter 23 is installed on the pipeline between the gas cylinder 22 and the pressure reducing valve 24, and a low-pressure filter 25 is installed on the pipeline between the pressure reducing valve 24 and the gas internal combustion engine 26. Here, high pressure and low pressure refer to relative high pressure and relative low pressure, without numerical limitations.

[0081] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A pressure reducing valve, comprising a main valve body and a main valve core; the main valve body having an inlet chamber and an outlet chamber, the inlet chamber communicating with the outlet chamber; the main valve core being slidably mounted within the main valve body, and when slid to a first isolation position, isolating the inlet chamber from the outlet chamber; characterized in that: The main valve body is provided with a hot water flow channel adjacent to the main valve core, and the hot water flow channel has an inlet connector and an outlet connector.

2. The pressure reducing valve according to claim 1, characterized in that: The hot water flow channel is formed by an annular groove and a main valve core seat; the annular groove is opened on the inner surface of the main valve body, and the groove opening is located on its own radial inner side; the main valve core seat is fixedly connected to the main valve body, and its own outer side closes the groove opening of the annular groove; the main valve core is in sealed contact with the main valve core seat when it is in the first isolation position.

3. The pressure reducing valve according to claim 2, characterized in that: The main valve core and the main valve core seat have the same conical surface, and the two conical surfaces fit together when the main valve core slides to the first partition position.

4. The pressure reducing valve according to claim 1, characterized in that: A pressure sensor is fixedly connected to the air outlet chamber, and the pressure sensor is used to detect the internal pressure of the air outlet chamber.

5. The pressure reducing valve according to any one of claims 1 to 4, characterized in that: Along the sliding direction of the main valve core, the main valve body has an opening one and an opening two at its two ends respectively; the opening one connects to the air inlet chamber, and the opening two connects to the air outlet chamber; a bottom cover is fixedly connected to the opening one, and a main valve spring is provided between the bottom cover and the main valve core, the main valve spring being used to provide elastic force to push the main valve core to the first partition position; a guide valve seat is fixedly connected to the opening two, and a piston sleeve is installed between the guide valve seat and the main valve body; a piston is slidably installed inside the piston sleeve, and the piston is fixedly connected to the main valve core; Inside the piston sleeve, the cavity on one side of the piston is connected to the outlet chamber through a through hole provided on the piston sleeve, and the cavity on the other side of the piston is connected to the inlet chamber through an inlet passage, so that the gas flowing in from the inlet chamber provides a thrust to push the main valve core toward the main valve spring; the inlet passage passes through the main valve body and the guide valve seat; A valve core is slidably mounted inside the valve seat; when the valve core slides to the second isolation position, it isolates the air intake passage; a valve spring is provided on one side of the valve core; the valve spring is located between the valve seat and the valve core, and is used to provide an elastic force to push the valve core to the second isolation position; a pushing assembly is provided on the other side of the valve core, and is used to provide a thrust to push the valve core towards the valve spring.

6. The pressure reducing valve according to claim 5, characterized in that: The piston sleeve has a guide hole for slidingly guiding the main valve core.

7. The pressure reducing valve according to claim 5, characterized in that: A valve core seat is fixedly connected inside the valve seat, and the valve core is in sealing contact with the valve core seat when it is in the second isolation position.

8. The pressure reducing valve according to claim 7, characterized in that: The valve core and the valve core seat have the same taper, and the two taper surfaces fit together when the valve core slides to the second partition position.

9. The pressure reducing valve according to claim 5, characterized in that, The actuating component includes: Adjusting valve seat, fixedly connected to the pilot valve seat, located on the side of the pilot valve core away from the pilot valve spring; The diaphragm is clamped between the regulating valve seat and the pilot valve seat; An adjusting spring base, located inside the adjusting valve seat, is used to press the diaphragm against the pilot valve core; An adjusting spring, located on the side of the adjusting spring base opposite to the diaphragm, is used to provide an elastic thrust that presses the adjusting spring base against the diaphragm; An adjusting screw, threadedly connected to the adjusting valve seat, is used to provide thrust to the end of the adjusting spring that is away from the adjusting spring base; An adjusting screw cap is threadedly connected to the adjusting seat, and covers the portion of the adjusting screw that extends out of the adjusting valve seat. Within the valve seat, the cavity located on the side of the diaphragm away from the regulating valve seat is connected to the outlet cavity via an inlet air passage two, which is independent of the inlet air passage one.

10. A gas-fired internal combustion engine cycle system, characterized in that: The gas-pressure reducing valve as described in any one of claims 1 to 9 is further comprising a gas internal combustion engine, a radiator, and a gas storage cylinder; The outlet of the radiator is connected to the inlet of the gas internal combustion engine through a pipeline, the outlet of the gas internal combustion engine is connected to the inlet connector of the pressure reducing valve through a pipeline, and the outlet connector of the pressure reducing valve is connected to the inlet of the radiator through a pipeline. The outlet of the gas storage cylinder is connected to the inlet chamber of the pressure reducing valve through a pipeline, and the outlet chamber of the pressure reducing valve is connected to the inlet of the gas internal combustion engine through a pipeline.

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