An electronically controlled pressure reducing valve and its working method

Abstract

The present invention relates to the technical field of pressure reducing valves, and discloses an electronically controlled pressure reducing valve and its working method. The electronically controlled pressure reducing valve includes a valve sleeve. Along its axial direction inside the valve sleeve, there are successively arranged a communicating valve chamber, a gas spring chamber, and a piston chamber. A valve assembly is arranged in the valve chamber, and a hollow movable plug is arranged in the piston chamber. One end of the movable plug is inserted into the valve chamber and is cooperatively connected with the valve assembly; a pilot housing is arranged on the valve sleeve, and an electromagnetic pilot valve I and an electromagnetic pilot valve II are arranged inside the pilot housing. The electromagnetic pilot valve I is communicated with the valve chamber through a flow channel I and is communicated with the gas spring chamber through a flow channel II. The electromagnetic pilot valve II is communicated with the gas spring chamber through a flow channel III and is communicated with the piston chamber through a flow channel IV; an inlet joint is arranged in the valve chamber, and an outlet joint is arranged in the piston chamber. A unloading elastic member is arranged between the outlet joint and the movable plug. The present invention realizes the pressurization or decompression of the piston chamber through an electronically controlled manner, so that the operator does not need to manually adjust, and can adjust during the operation of the engine.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure reducing valves, and particularly to an electronically controlled pressure reducing valve and its working method. Background Art

[0002] Pressure reducing valves are general products. In the field of gas engines, pressure reducing valves can be used to control the output power of engines. Existing pressure reducing valves are generally mechanical spring - type manual pressure reducing valves. When an automobile or aerospace engine is in operation, it is very difficult for an operator to manually adjust the pressure reducing valve, which poses certain risks.

[0003] For example, in the invention patent with the Chinese patent publication number CN108591558A and the patent name Pressure Reducing Valve, during actual application, it is necessary to rotate the adjusting rod to compress the disc spring and the spring. The force is transmitted to the ejector rod through the high - pressure diaphragm, and the ejector rod pushes the valve core downward to move away from the conical flare to a certain opening height. Then, the force is transmitted to the ejector rod of the low - pressure pressure - reducing part through the low - pressure diaphragm, and the ejector rod pushes the valve core of the low - pressure pressure - reducing part downward to move away from the corresponding conical flare to a certain opening height. After that, the high - pressure gas entering from the fluid inlet of the inlet joint passes through the throttle port and the gap between the small - diameter section and the valve core, losing part of the pressure to meet the design pressure - reducing requirements. The high - pressure gas is reduced to a certain pressure and then enters the high - pressure chamber of the low - pressure pressure - reducing part through the large - diameter section and the flare structure. Similarly, a certain low - pressure gas is reduced to a certain pressure through the low - pressure pressure - reducing part to meet the usage requirements.

[0004] The operation method introduced in the above - mentioned prior art is still achieved by manual adjustment. For a gas engine in operation, manual adjustment is not only troublesome but also has a certain degree of danger. Summary of the Invention

[0005] In view of the deficiencies in the above - mentioned background art, the present invention proposes an electronically controlled pressure reducing valve and its working method, which can achieve pressurization or decompression at the outlet end through an electronic control method, enabling the operator to adjust the pressure without manual operation and being able to adjust during the operation of the engine. It not only has a wider application range but is also safer without manual adjustment.

[0006] The technical solution of the present invention is realized as follows:

[0007] An electronically controlled pressure reducing valve includes a valve sleeve. Along the axial direction inside the valve sleeve, there are successively arranged a communicating valve chamber, a gas spring chamber, and a piston chamber. Inside the valve chamber, there is a valve component for controlling the connection between the valve chamber and the gas spring chamber. An axially hollow movable plug is movably arranged inside the piston chamber. One end of the movable plug passes through the gas spring chamber and extends into the valve chamber to be connected with the valve component in a matching manner;

[0008] The valve sleeve is provided with a pilot housing, and an electromagnetic pilot valve I and an electromagnetic pilot valve II are arranged inside the pilot housing. The inlet end of the electromagnetic pilot valve I is communicated with the valve chamber through a flow channel I, the outlet end of the electromagnetic pilot valve I is communicated with the gas spring chamber through a flow channel II, the inlet end of the electromagnetic pilot valve II is communicated with the gas spring chamber through a flow channel III, and the outlet end of the electromagnetic pilot valve II is communicated with the piston chamber through a flow channel IV;

[0009] An inlet joint communicated with the flow channel I is arranged at the port of the valve chamber, an outlet joint is arranged at the port of the piston chamber, and a unloading elastic member is arranged between the outlet joint and the movable plug.

[0010] The present invention is further arranged as follows: The valve component includes a valve seat, a fixed retaining ring and a conduction moving member arranged inside the fixed retaining ring. The fixed retaining ring is arranged on one side of the valve chamber close to the gas spring chamber, the valve seat is arranged on the side of the fixed retaining ring far from the gas spring chamber, the conduction moving member is arranged inside the fixed retaining ring, one side of the valve seat is communicated with the flow channel I, the other side is in contact with the conduction moving member, and one end of the movable plug is inserted into the fixed retaining ring and is connected with the conduction moving member in a matching manner.

[0011] The present invention is further arranged as follows: The inner hole of the fixed retaining ring includes a moving groove and a tapered surface inclined hole. The moving groove is opened on one side of the fixed retaining ring close to the valve seat, the tapered surface inclined hole is opened at the bottom of the moving groove. The conduction moving member is movably arranged in the moving groove, one end of the movable plug passes through the tapered surface inclined hole and is inserted into the moving groove to be connected with the conduction moving member, and a plurality of through holes communicated with the tapered surface inclined hole are opened on a part of the side surface of the movable plug inserted into the fixed retaining ring.

[0012] The present invention is further arranged as follows: The conduction moving member is a hollow columnar block, the inner hole of the conduction moving member is communicated with the inner hole of the movable plug, and flow holes I communicated with the tapered surface inclined hole are opened on both sides of the inner hole of the conduction moving member.

[0013] The present invention is further arranged as follows: Flow holes II are opened on the valve seat, the flow holes II are located between the two flow holes I and on both sides of the inner hole of the conduction moving member, and the conduction moving member seals the flow holes II through a sealing ring.

[0014] The present invention is further arranged as follows: The unloading elastic member is a spring.

[0015] The present invention is further arranged as follows: A high-pressure temperature sensor is arranged on the outer side wall of the valve sleeve.

[0016] A working method of an electronically controlled pressure reducing valve includes two working states: pressurization and decompression.

[0017] In the pressurization state, the electromagnetic pilot valve I is opened and the electromagnetic pilot valve II is closed. The gas from the air source enters the gas spring cavity through the valve chamber, flow channel I, electromagnetic pilot valve I and flow channel II. The pressure in the gas spring cavity gradually increases. When the pressure in the gas spring cavity is greater than the elastic force of the unloading elastic part, the movable plug moves. The movable plug drives the conduction moving part to move in the moving groove, and the sealing ring disengages from the valve seat. The flow hole II, flow hole I, conical inclined hole, through hole and the inner hole of the movable plug are connected. The pressure in the piston cavity increases, achieving pressurization.

[0018] In the depressurization state, the electromagnetic pilot valve I is closed and the electromagnetic pilot valve II is opened. No new gas flows into the gas spring cavity, and there is gas flowing from the gas spring cavity through the flow channel III, electromagnetic pilot valve II and flow channel IV into the piston cavity. The pressure in the piston cavity gradually increases. When the pressure in the gas spring cavity is less than the sum of the elastic force of the unloading spring and the gas pressure in the piston cavity, the movable plug moves and pushes the conduction moving part to gradually approach the valve seat, gradually reducing the gas flowing through the flow hole II to the piston cavity, achieving depressurization of the valve body.

[0019] The beneficial technical effects of the present invention are as follows. The present invention controls the movement of the movable plug by controlling the opening and closing of the electromagnetic pilot valve I and the electromagnetic pilot valve II, thereby realizing the opening or closing of the valve seat, and further realizing the conduction or gradual closing of the valve body. The conduction of the valve body can increase the pressure at the outlet joint of the piston cavity, achieving pressurization. The gradual closing of the valve body can gradually reduce the pressure at the outlet joint of the piston cavity, achieving depressurization. Thus, the electro-controlled pressurization or depressurization of the valve body is realized. Compared with the traditional mechanical manually adjusted pressure reducing valve, the operation is simpler and safer, and the application range is wider. It can be applied to the engine in operation.

[0020] At the same time, the movement of the movable plug in the present invention is realized by the pressure in the gas spring cavity. Compared with the traditional mechanical spring, the structure is simpler and the cost is lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0022] Figure 1 It is a schematic diagram of the overall sectional structure of the present invention;

[0023] Figure 2 For Figure 1 The enlarged schematic diagram of part A in

[0024] Figure 3 It is a side view of the present invention.

[0025] In the figure, 1 is a valve sleeve; 11 is a valve chamber; 12 is a gas spring chamber; 13 is a piston chamber; 2 is a valve component; 21 is a valve seat; 22 is a fixed retaining ring; 23 is a conduction moving part; 211 is a through-hole II; 212 is a valve through-hole; 231 is a through-hole I; 232 is a sealing ring; 3 is a movable plug; 31 is a guiding through-hole; 4 is a pilot housing; 41 is an electromagnetic pilot valve I; 42 is an electromagnetic pilot valve II; 43 is a flow channel I; 44 is a flow channel II; 45 is a flow channel III; 46 is a flow channel IV; 51 is an inlet joint; 52 is an outlet joint; 6 is a unloading elastic part; 7 is a high-pressure temperature sensor. Specific embodiments

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] Embodiment 1:

[0028] Refer to Figure 1 and Figure 2 , an electronically controlled pressure reducing valve includes a valve sleeve 1. Inside the valve sleeve 1, a valve chamber 11, a gas spring chamber 12, and a piston chamber 13 that are connected to each other are sequentially arranged along its axial direction. A valve component 2 is arranged in the valve chamber 11.

[0029] Specifically, the valve component 2 includes a valve seat 21, a fixed retaining ring 22, and a conduction moving part 23 arranged inside the fixed retaining ring 22. The fixed retaining ring 22 is installed on one side of the valve chamber 11 close to the gas spring chamber 12. A sealing ring is sleeved on the outer ring surface of the fixed retaining ring 22. The sealing ring can seal the gap between the fixed retaining ring 22 and the inner cavity wall of the valve chamber 11 to prevent gas from entering the gas spring chamber 12 from outside the fixed retaining ring 22.

[0030] The valve seat 21 is arranged in the valve chamber 11 and is located on the side of the fixed retaining ring 22 away from the gas spring chamber 12. Two through-holes II 211 that are symmetrically arranged about the central axis of the valve seat 21 are opened on the valve seat 21.

[0031] The inner hole of the fixed retaining ring 22 includes a moving groove and a tapered inclined hole. The moving groove is opened on the side of the fixed retaining ring 22 close to the valve seat 21. The tapered inclined hole is opened at the bottom of the moving groove, and the tapered inclined hole communicates with the gas spring chamber 12.

[0032] The conduction moving member 23 is movably arranged in the moving groove and contacts the valve seat 21. Specifically, the conduction moving member 23 is a hollow columnar block, and the inner hole of the conduction moving member 23 is coaxially arranged with the valve cavity 11. Flow holes I 231 communicating with the tapered oblique holes are formed on both sides of the inner hole of the conduction moving member 23, and the two flow holes I 231 are symmetrically arranged with respect to the inner hole of the conduction moving member 23. The two flow holes II 211 of the valve seat 21 are respectively located on both sides of the inner hole of the conduction moving member 23 and are both located between the two flow holes I 231.

[0033] A sealing ring 232 coaxially arranged with the conduction moving member 23 is embedded on one side of the conduction moving member 23 close to the valve seat 21. When the conduction moving member 23 contacts the valve seat 21, the sealing ring 232 blocks the two flow holes II 211 of the valve seat 21.

[0034] An axially hollow movable plug 3 is movably arranged in the piston cavity 13. The movable plug 3 includes a large head end and a small head end. The large head end of the movable plug 3 is located in the piston cavity 13, and the small head end of the movable plug 3 passes through the gas spring cavity 12 and extends into the fixed retaining ring 22 of the valve cavity 11 and is snap-connected with the conduction moving member 23.

[0035] The inner hole of the movable plug 3 is coaxially communicated with the inner hole of the conduction moving member 23. A plurality of through holes 31 communicating with the tapered oblique holes are formed on a part of the side surface of the movable plug 3 inserted into the fixed retaining ring 22.

[0036] A pilot housing 4 is fixed on the valve sleeve 1. An electromagnetic pilot valve I 41 and an electromagnetic pilot valve II 42 are arranged in the pilot housing 4. A flow channel I 43, a flow channel II 44, a flow channel III 45 and a flow channel IV 46 are arranged in the pilot housing 4. The inlet end of the electromagnetic pilot valve I 41 is communicated with the valve cavity 11 through the flow channel I 43, the outlet end of the electromagnetic pilot valve I 41 is communicated with the gas spring cavity 12 through the flow channel II 44, the inlet end of the electromagnetic pilot valve II 42 is communicated with the gas spring cavity 12 through the flow channel III 45, and the outlet end of the electromagnetic pilot valve II 42 is communicated with the outlet cavity through the flow channel IV 46.

[0037] A valve through hole 212 is formed on one side of the valve seat 21 far from the conduction moving member 23, and the valve through hole 212 is communicated with the flow channel I 4 in the pilot housing 3.

[0038] An inlet joint 51 communicated with the flow channel I 43 is arranged at the port of the valve cavity 11, an outlet joint 52 is arranged at the port of the piston cavity 13, a unloading elastic member 6 is arranged between the outlet joint 52 and the movable plug 3, and the unloading elastic member 6 is selected as a spring. The end of the outlet joint 52 far from the movable plug 3 is connected with an external gas-using device.

[0039] Refer to Figure 3, a high-pressure temperature sensor 7 is installed on the outer side wall of the valve sleeve 1. The high-pressure temperature sensor 7 is used to monitor the temperature and pressure in the outlet cavity, facilitating the operator to understand the pressure and temperature at the outlet cavity of the valve sleeve 1 in real time, and ensuring the normal temperature or pressure inside the valve sleeve 1.

[0040] In this embodiment, the inlet joint 51 is connected to the gas source. The operator can control the change of the pressure in the gas spring cavity 12 by controlling the opening and closing of the electromagnetic pilot valve I 41 and the electromagnetic pilot valve II 42, thereby controlling the movement of the movable plug 3 inside the valve sleeve 1. The movement of the movable plug 3 can drive the conduction moving part 23 to act, thereby realizing the opening or gradual closing of the valve seat 21, and further realizing the conduction or gradual closing of the valve sleeve 1. When the valve sleeve 1 is conducting, the pressure at the outlet joint 52 of the piston cavity 13 can be increased, realizing the pressure boost of the valve sleeve 1. When the valve sleeve 1 is gradually closed, the pressure at the outlet joint 52 of the piston cavity 13 can be gradually reduced, thereby realizing the electric control pressure boost or electric control pressure reduction of the present invention. Compared with the traditional mechanical manually adjusted pressure reducing valve, the operation is simpler and safer, and the application range is wider, and it can be applied to the running engine.

[0041] Embodiment 2:

[0042] A working method of the electric control pressure reducing valve as described in Embodiment 1 includes two working states: pressure boost and pressure reduction.

[0043] In the pressure boost state, the electromagnetic pilot valve I 41 is opened and the electromagnetic pilot valve II 42 is closed. The gas from the gas source enters the gas spring cavity 12 through the flow channel I 43, the electromagnetic pilot valve I 41 and the flow channel II 44 from the valve cavity 11. The pressure in the gas spring cavity 12 gradually increases. When the pressure in the gas spring cavity 12 is greater than the elastic force of the unloading elastic part 6, the movable plug 3 moves. The movable plug 3 drives the conduction moving part 23 to move in the moving groove, and the sealing ring 232 disengages from the valve seat 21. The through hole II 211, the through hole I 231, the tapered inclined hole, the through hole 31 and the inner hole of the movable plug 3 are connected, and the pressure in the piston cavity 13 increases, realizing pressure boost.

[0044] In the pressure reduction state, the electromagnetic pilot valve I 41 is closed and the electromagnetic pilot valve II 42 is opened. No new gas flows into the gas spring cavity 12, and there is gas flowing from the gas spring cavity 12 into the piston cavity 13 through the flow channel III 45, the electromagnetic pilot valve II 42 and the flow channel IV 46. The pressure in the piston cavity 13 gradually increases. When the pressure in the gas spring cavity 12 is less than the sum of the elastic force of the unloading spring and the gas pressure in the piston cavity 13, the movable plug 3 moves and pushes the conduction moving part 23 to gradually approach the valve seat 21, making the gas flowing through the through hole II 211 to the piston cavity 13 gradually decrease, realizing the pressure reduction of the piston cavity 13, and further realizing the pressure reduction function of the present invention.

[0045] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An electrically controlled pressure reducing valve, characterized in that: The invention comprises a valve sleeve (1), wherein the valve sleeve (1) is provided with a valve chamber (11), a gas spring chamber (12) and a piston chamber (13) which are communicated with each other in sequence along its axial direction, wherein the valve chamber (11) is provided with a valve assembly (2) for controlling the communication between the valve chamber (11) and the gas spring chamber (12), and wherein an axially hollow movable plug (3) is movably provided in the piston chamber (13), wherein one end of the movable plug (3) passes through the gas spring chamber (12) and extends into the valve chamber (11) to be matched with the valve assembly (2); A pilot housing (4) is provided on the valve sleeve (1), and an electromagnetic pilot valve I (41) and an electromagnetic pilot valve II (42) are provided in the pilot housing (4). The inlet end of the electromagnetic pilot valve I (41) is communicated with the valve chamber (11) through a flow channel I (43), the outlet end of the electromagnetic pilot valve I (41) is communicated with the gas spring chamber (12) through a flow channel II (44), the inlet end of the electromagnetic pilot valve II (42) is communicated with the gas spring chamber (12) through a flow channel III (45), and the outlet end of the electromagnetic pilot valve II (42) is communicated with the piston chamber (13) through a flow channel IV (46); An inlet connector (51) communicating with the flow channel I (43) is provided at the port of the valve chamber (11), an outlet connector (52) is provided at the port of the piston chamber (13), and a load-relieving elastic member (6) is provided between the outlet connector (52) and the movable plug (3); The valve assembly (2) comprises a valve seat (21), a fixed retaining ring (22) and a conductive movable member (23) arranged in the fixed retaining ring (22); the fixed retaining ring (22) is arranged on a side of the valve cavity (11) close to the gas spring cavity (12); the valve seat (21) is arranged on a side of the fixed retaining ring (22) away from the gas spring cavity (12); the conductive movable member (23) is arranged in the fixed retaining ring (22); one side of the valve seat (21) is communicated with the flow channel I (43) and the other side is in contact with the conductive movable member (23); one end of the movable plug (3) is inserted into the fixed retaining ring (22) and is matched with the conductive movable member (23).

2. The electrically controlled pressure reducing valve according to claim 1, characterized in that: The inner hole of the fixed retaining ring (22) includes a movable groove and a conical inclined hole. The movable groove is opened on a side of the fixed retaining ring (22) close to the valve seat (21), and the conical inclined hole is opened at the bottom of the movable groove. The conductive movable member (23) is movably arranged in the movable groove. One end of the movable plug (3) passes through the conical inclined hole and is inserted into the movable groove to be connected with the conductive movable member (23). A part of the side surface of the movable plug (3) inserted into the fixed retaining ring (22) is provided with a plurality of conductive holes (31) communicating with the conical inclined hole.

3. The electrically controlled pressure reducing valve according to claim 2, characterized in that: The conducting movable member (23) is a hollow columnar block, the inner hole of the conducting movable member (23) is communicated with the inner hole of the movable plug (3), and flow holes I (231) communicating with the conical inclined hole are provided on both sides of the inner hole of the conducting movable member (23).

4. The electrically controlled pressure reducing valve according to claim 3, characterized in that: A flow hole II (211) is provided on the valve seat (21), and the flow hole II (211) is located between the two flow holes I (231) and on both sides of the inner hole of the conductive movable member (23). The conductive movable member (23) blocks the flow hole II (211) through a sealing ring (232).

5. The electrically controlled pressure reducing valve according to claim 4, characterized in that: The unloading elastic member (6) is a spring.

6. The electrically controlled pressure reducing valve according to claim 5, characterized in that: A high-pressure temperature sensor (7) is provided on the outer side wall of the valve sleeve (1).

7. An operating method of an electrically controlled pressure reducing valve according to claim 6, characterized in that: It includes two working states: pressurization and depressurization: In the pressurized state, the electromagnetic pilot valve I (41) is opened and the electromagnetic pilot valve II (42) is closed, and the gas source gas enters the gas spring chamber (12) from the valve chamber (11) through the flow channel I (43), the electromagnetic pilot valve I (41) and the flow channel II (44), and the pressure in the gas spring chamber (12) gradually increases. When the pressure in the gas spring chamber (12) is greater than the elastic force of the unloading elastic member (6), the movable plug (3) moves, and the movable plug (3) drives the conductive movable member (23) to move in the movable groove, and the sealing ring (232) is separated from the valve seat (21), and the flow hole II (211), the flow hole I (231), the conical inclined hole, the conductive hole (31) and the inner hole of the movable plug (3) are connected, and the pressure in the piston chamber (13) increases, thereby achieving pressurization; In the decompression state, the electromagnetic pilot valve I (41) is closed and the electromagnetic pilot valve II (42) is opened. No new gas flows into the gas spring chamber (12), and gas flows from the gas spring chamber (12) through the flow channel III (45), the electromagnetic pilot valve II (42) and the flow channel IV (46) into the piston chamber (13). The pressure in the piston chamber (13) gradually increases. When the pressure in the gas spring chamber (12) is less than the sum of the elastic force of the unloading elastic member (6) and the gas pressure in the piston chamber (13), the movable plug (3) moves and pushes the conductive movable member (23) to gradually approach the valve seat (21), gradually reducing the gas flowing to the piston chamber (13) through the flow hole II (211), thereby achieving decompression of the valve body.

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