Pneumatic control valve adopting line-surface sealing and energy-saving hydraulic station

Abstract

The utility model provides a pneumatic control valve adopting line and surface sealing and an energy-saving hydraulic station. The pneumatic control valve comprises a valve shell, a valve sleeve, a valve element end cover and a reversing valve element. Wherein a mounting hole is formed in the valve shell, the valve sleeve is arranged in the mounting hole and blocks one opening side of the mounting hole, and the valve element end cover is arranged on the other opening side of the mounting hole; a reversing hole is formed in the valve sleeve, and the reversing valve element is arranged in the reversing hole in a sliding and penetrating mode. An elastic reset piece is further arranged between the limiting end of the reversing valve element and the valve element end cover. A first contact sealing structure is arranged at the end, close to the valve element end cover, of the reversing hole of the valve sleeve, a second contact sealing structure is arranged at the limiting end of the reversing valve element, and the second contact sealing structure can abut against and make contact with the first contact sealing structure to form mechanical line sealing or mechanical face sealing. According to the pneumatic control reversing valve, through line sealing or face sealing, a sealing ring is omitted, the opening sensitivity of the pneumatic control valve is greatly improved, and the pneumatic control reversing valve is prevented from being clamped and stopped.

Description

Technical Field

[0001] The utility model relates to a hydraulic station, in particular to a pneumatic control valve with line-plane sealing and an energy-saving hydraulic station. Background Art

[0002] A hydraulic station is a hydraulic device that supplies oil according to the required flow direction, pressure and flow rate, and is usually used in conjunction with machine tools that require hydraulic drive actuators.

[0003] The Chinese utility model patent specification CN219081986U discloses an energy-saving hydraulic station, as Figure 1 shown, including: an oil tank 1', a gas-liquid booster pump and a solenoid valve group 6'; the liquid outlet of the oil tank 1' is communicated with the liquid inlet of the gas-liquid booster pump; the liquid outlet of the gas-liquid booster pump is communicated with the liquid inlet of the solenoid valve group 6'; the liquid return port of the solenoid valve group 6' is communicated with the liquid inlet of the oil tank 1'; the gas-liquid booster pump includes: a pneumatic cylinder 10' and an oil cylinder 11'; the pneumatic cylinder 10' and the oil cylinder 11' are communicated; a pneumatic piston in contact with the inner wall is arranged in the pneumatic cylinder 10', and an oil cylinder piston in contact with the inner wall is arranged in the oil cylinder 11'; the piston area of the pneumatic piston is larger than the piston area of the oil cylinder piston; it also includes a gas supply device, including: a gas source, a first pneumatic control valve 27', a second pneumatic control valve 28' and a pneumatic control reversing valve 29'; the first pneumatic control valve 27' is arranged on one side of the pneumatic cylinder 10, and the second pneumatic control valve 28 is arranged on the other side of the pneumatic cylinder 10'; the gas source is respectively connected to the air inlets of the first pneumatic control valve 27', the second pneumatic control valve 28' and the pneumatic control reversing valve 29'; the pneumatic control reversing valve 28', includes: an A' air outlet and a B' air outlet; the A' air outlet is communicated with one side of the pneumatic cylinder 10', and the B' air outlet is communicated with the other side of the pneumatic cylinder 10'; the first pneumatic control valve 27' is connected to the pneumatic control reversing valve 29' through a first gas source circuit 30' to control the pneumatic control reversing valve 29' to activate the A' air outlet; the second pneumatic control valve 28' is connected to the pneumatic control reversing valve 29' through a second gas source circuit 31' to control the pneumatic control reversing valve 29' to activate the B' air outlet.

[0004] The working process of the above energy-saving hydraulic station is as follows: The pneumatic piston is located on the left side inside the pneumatic cylinder 10', triggering the first pneumatic control valve 27' to open. The first air source circuit 30' pushes the pneumatic control reversing valve 29'. Compressed air enters the inside of the pneumatic cylinder 10' from the A' air outlet, and enters the space on the left side of the pneumatic piston, thereby pushing the pneumatic piston to move to the right (the first pneumatic control valve 27' resets and cuts off). It drives the cylinder pistons in the two cylinders 11' on both sides to move to the right. A negative pressure is formed in the left cylinder 11', sucking hydraulic oil from the oil tank 1', and entering the cylinder 11' through the connected oil inlet pipeline, inlet liquid check valve and liquid inlet and outlet plate; the hydraulic oil in the right cylinder 11' is output to the solenoid valve group through its liquid inlet and outlet plate, outlet liquid check valve and oil outlet pipeline; when the pneumatic piston moves to the right side of the pneumatic cylinder 10', it triggers the second pneumatic control valve 28' to open. The second air source circuit 31' pushes the pneumatic control reversing valve 29'. Compressed air enters the inside of the pneumatic cylinder 10' from the B' air outlet, and enters the space on the right side of the pneumatic piston, thereby pushing the pneumatic piston to move to the left (the second pneumatic control valve 28' resets and cuts off). It drives the cylinder pistons in the two cylinders 11' on both sides to move to the left. A negative pressure is formed in the right cylinder 11', sucking hydraulic oil from the oil tank 1', and entering the cylinder 11' through the connected oil inlet pipeline, inlet liquid check valve and liquid inlet and outlet plate; the hydraulic oil in the left cylinder 11' is output to the solenoid valve group through its liquid inlet and outlet plate, outlet liquid check valve and oil outlet pipeline; the reciprocating movement of the pneumatic cylinder 10' forms a continuous hydraulic output. When the set pressure is reached, the pneumatic cylinder 10' stops moving to maintain a constant pressure, and the pneumatic cylinder 10' remains in a pressurized state and stops moving, thus no longer consuming compressed air. Compared with the traditional hydraulic station, it reduces energy consumption and heat generation, achieving the purpose of energy saving.

[0005] In the factory use environment of the above energy-saving hydraulic station, as Figure 2 shown, both the first pneumatic control valve and the second pneumatic control valve use a rubber sealing ring 2' to seal the block between the air inlet and outlet, that is, the reversing valve core 3' uses a rubber sealing method. However, during use, when the pneumatic piston is located on the left side inside the pneumatic cylinder 10' and triggers the first pneumatic control valve 27' to open, the pneumatic piston pushes the reversing valve core of the first pneumatic control valve 27' to slide. However, due to the elasticity of the rubber sealing ring 30', the rubber sealing ring 30' still blocks the channel between the reversing valve core and the valve housing, resulting in low sensitivity of triggering and opening of the first pneumatic control valve and the second pneumatic control valve, and causing the pneumatic control reversing valve 29' to have a jamming stop phenomenon. Utility Model Content

[0006] The technical problem to be solved by the present utility model is to provide a pneumatic control valve using line and surface sealing and an energy-saving hydraulic station that will not have a jamming stop.

[0007] To solve the above technical problem, the present utility model provides the following technical solutions:

[0008] On the one hand, the utility model proposes an air-controlled valve adopting line-surface sealing, the air-controlled valve comprising: a valve housing, a valve sleeve, a valve core end cover, and a reversing valve core; wherein, the valve housing is provided with a mounting hole, the valve sleeve is arranged in the mounting hole and blocks one opening side of the mounting hole, and the valve core end cover is arranged on the other opening side of the mounting hole; wherein, an air inlet cavity is formed between the valve core end cover and the valve sleeve in the mounting hole of the valve housing; a reversing hole is provided on the valve sleeve, the reversing valve core is slidably penetrated in the reversing hole, and the limiting end of the reversing valve core performs reciprocating linear motion between the valve sleeve and the valve core end cover, and the triggering opening end of the reversing valve core can slide and extend in the valve housing. Outside; an elastic reset member is also provided between the limit end of the reversing valve core and the valve core end cover, for applying a reset force to the reversing valve core; the valve housing is provided with an air inlet connected to the air inlet chamber, and the valve housing is provided with an air outlet connected to the reversing hole; the valve sleeve is provided with a first contact sealing structure at one end of the reversing hole close to the valve core end cover, and a second contact sealing structure is provided at the limit end of the reversing valve core, under the reset force of the elastic reset member, the second contact sealing structure can press and contact the first contact sealing structure to form a mechanical line seal or a mechanical surface seal, so as to realize the disconnection between the reversing hole and the air inlet chamber, so as to realize the disconnection between the air inlet and the air outlet.

[0009] Furthermore, in the above-mentioned air-controlled valve adopting line-surface sealing, the first contact sealing structure is a concave structure, and the second contact sealing structure is a convex transition contact body.

[0010] Furthermore, in the above-mentioned air-controlled valve using line-surface sealing, the first contact sealing structure is a rounded structure, the second contact sealing structure is a conical structure, and the outer diameter of the second contact sealing structure gradually increases from the triggering opening end of the reversing valve core to the limiting end of the reversing valve core; the first contact sealing structure and the second contact sealing structure form a circumferential ring line seal when they are pressed into contact.

[0011] Furthermore, in the above-mentioned air-controlled valve using line-surface sealing, the second contact sealing structure is a conical structure, and the outer diameter of the second contact sealing structure gradually increases from the triggering and opening end of the reversing valve core to the limiting end of the reversing valve core; the first contact sealing structure is an inwardly expanding tapered structure, and its taper is smaller than the taper of the conical structure, and the first contact sealing structure forms a circumferential annular seal when the second contact sealing structure is pressed into contact.

[0012] Further, for the pneumatic control valve adopting line-plane sealing, the second contact sealing structure is a conical structure, and from the trigger opening end to the limiting end of the reversing spool, the outer diameter of the second contact sealing structure gradually increases; the first contact sealing structure is an inner expanding taper structure adapted to the conical structure, and a mechanical surface seal is formed when the first contact sealing structure and the second contact sealing structure are in pressing contact.

[0013] Further, for the pneumatic control valve adopting line-plane sealing, an air outlet groove is provided on the outer peripheral wall of the valve sleeve, which is arranged in a whole circle along the circumferential direction of the valve sleeve, and the air outlet groove is communicated with the air outlet on the valve housing; a communication hole arranged radially along the valve sleeve is provided on the valve sleeve, which is respectively communicated with the air outlet groove and the reversing hole to realize the communication between the air outlet and the reversing hole.

[0014] Further, for the pneumatic control valve adopting line-plane sealing, a first elastic guide rod extends at the limiting end of the reversing spool, and one end of the elastic resetting member is sleeved on the first elastic guide rod; a second elastic guide rod is provided on the valve core end cover, and the other end of the elastic resetting member is sleeved on the second elastic guide rod.

[0015] Further, for the pneumatic control valve adopting line-plane sealing, the valve sleeve includes: a valve sleeve body and a retaining piece detachably connected to the valve sleeve body; wherein, an inner peripheral sealing groove and an outer peripheral sealing groove are formed at the connection between the retaining piece and the valve sleeve body.

[0016] Further, for the pneumatic control valve adopting line-plane sealing, an outer peripheral sealing ring is provided between the valve sleeve and the valve housing, and an inner peripheral sealing ring is also provided between the valve sleeve and the reversing spool.

[0017] On the other hand, the present invention proposes an energy-saving hydraulic station, and the energy-saving hydraulic station is provided with the pneumatic control valve adopting line-plane sealing.

[0018] The pneumatically controlled valve and the energy-saving hydraulic station adopting line-plane sealing provided by the present utility model have a gap between the limiting end of the reversing spool and the valve sleeve, that is, when there is a gap between the second contact sealing structure and the first contact sealing structure, the reversing hole and the mounting hole are communicated through the gap between the second contact sealing structure and the first contact sealing structure, so that the air outlet cavity of the valve sleeve is connected to the air inlet cavity on the valve housing, enabling the air inlet to communicate with the air outlet, that is, the pneumatically controlled valve is in an open state; when the limiting end of the reversing spool abuts against the valve sleeve, the second contact sealing structure can abut against the first contact sealing structure to form a mechanical line seal or a mechanical plane seal, cutting off the connection between the air outlet cavity of the valve sleeve and the air inlet cavity on the valve housing, and further cutting off the connection between the reversing hole and the air inlet cavity, thereby realizing the disconnection between the air inlet and the air outlet. Through line seal or plane seal, the setting of the sealing ring, that is, the O-ring, is cancelled, and the opening sensitivity of the pneumatically controlled valve is greatly improved, avoiding the jamming phenomenon of the pneumatic reversing valve. Brief Description of the Drawings

[0019] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present utility model. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0020] Figure 1 is a schematic structural diagram of an energy-saving hydraulic station in the prior art;

[0021] Figure 2 is a schematic structural diagram of a pneumatically controlled valve in the prior art;

[0022] Figure 3 is a schematic structural diagram of the pneumatically controlled valve adopting line-plane sealing provided by the embodiment of the present utility model;

[0023] Figure 4 is a schematic structural diagram of the valve housing provided by the embodiment of the present utility model;

[0024] Figure 5 is Figure 4 a cross-sectional view taken along line A-A in

[0025] Figure 6 is a schematic structural diagram of the line seal between the valve sleeve and the reversing spool provided by the embodiment of the present utility model;

[0026] Figure 7 is a schematic structural diagram of the valve sleeve provided by the embodiment of the present utility model;

[0027] Figure 8 is a schematic structural diagram of the reversing spool provided by the embodiment of the present utility model;

[0028] Figure 9 Another structural schematic diagram of the line seal between the valve sleeve and the reversing spool provided by the embodiment of the present utility model;

[0029] Figure 10 Structural schematic diagram of the valve sleeve body in the valve sleeve provided by the embodiment of the present utility model;

[0030] Figure 11 Structural schematic diagram of the retaining piece in the valve sleeve provided by the embodiment of the present utility model;

[0031] Figure 12 Another structural schematic diagram of the line seal between the valve sleeve and the reversing spool provided by the embodiment of the present utility model;

[0032] Figure 13 Structural schematic diagram of the surface seal between the valve sleeve and the reversing spool provided by the embodiment of the present utility model;

[0033] Figure 14 Structural schematic diagram of the energy-saving hydraulic station provided by the embodiment of the present utility model. Detailed implementation manners

[0034] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be fully conveyed to those skilled in the art. It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0035] See Figures 3 to 5 , which shows the preferred structure of the pneumatically controlled valve adopting line and surface seals provided by the embodiment of the present utility model. As shown in the figure, the pneumatically controlled valve 100 may include: a valve housing 1, a valve sleeve 2, a spool end cover 3, a reversing spool 4, and an elastic reset member 5; wherein,

[0036] The valve housing 1 is provided with an installation hole 11, the valve sleeve 2 is arranged in the installation hole 11 and blocks one opening side of the installation hole 11 (such as Figure 3 the right opening shown), and the spool end cover 3 is arranged on the other opening side of the installation hole 11 (such as Figure 3 the left opening shown); wherein, an air inlet cavity 12 is formed between the spool end cover 3 and the valve sleeve 2 in the installation hole 11 of the valve housing 1.

[0037] Specifically, the valve housing 1 serves as a shell structure to support the valve sleeve 2 and the valve core end cover 3. The valve housing 1 may be provided with a mounting hole 11, which may be a stepped through hole. For example, the inner diameter of the left hole is smaller than the inner diameter of the right hole, so that a stepped surface is formed at the holes on both sides, and the valve sleeve 2 can be limited. In this embodiment, the valve sleeve 2 is arranged in the right large hole, and is limited by the stepped surface, that is, the left side wall of the valve sleeve 2 is pressed against the stepped surface, and the right end of the mounting hole 11 can be blocked. The valve core end cover 3 can be placed on the left side of the left small hole, that is, the valve core end cover 3 is placed on the left side of the valve housing 1 and connected to the left end face of the valve housing 1, and the left side of the mounting hole 11 can be blocked. Among them, an air inlet cavity 12 is formed between the valve core end cover 3 and the valve sleeve 2 in the mounting hole 11 of the valve housing 1.

[0038] Continue to see Figure 3 The valve sleeve 2 is provided with a reversing hole 21, the reversing valve core 4 is slidably arranged in the reversing hole 21, and the limiting end of the reversing valve core 4 (such as Figure 3 The left end shown in the figure) performs reciprocating linear motion between the valve sleeve 2 and the valve core end cover 3, and the trigger opening end of the reversing valve core 4 (as shown in the figure) Figure 3 An elastic reset member 5 is also provided between the limit end of the reversing valve core 4 and the valve core end cover 3 for applying a reset force to the reversing valve core 4.

[0039] Specifically, the valve sleeve 2 is provided with a reversing hole 21 arranged along its axial direction. The reversing hole 21 can be a circular through-hole structure, and the reversing valve core 4 can be adapted to the reversing hole 21. The reversing hole 21 can be a stepped hole structure. For example, the inner diameter of the left hole is larger than the inner diameter of the right hole. The inner diameter of the right hole is adapted to the outer diameter of the reversing valve core 4. There can be a gap between the inner wall of the left hole and the reversing valve core 4 to form an air outlet cavity 23. The air outlet cavity 23 can be an annular cavity, and the air outlet cavity 23 is connected to the air outlet 14. The reversing valve core 4 is slidably arranged in the reversing hole 21, and the limiting end of the reversing valve core 4 (such as Figure 3 The left end of the reversing valve core 4 (as shown in the figure) performs reciprocating linear motion between the valve sleeve 2 and the valve core end cover 3, which can limit the left and right movement of the reversing valve core 4. Figure 3The right end shown) can slide and extend outside the valve housing 1 so as to push the reversing spool 4 to retract leftward under an external force until the reversing spool 4 retracts into the valve housing 1. In this embodiment, to facilitate the reset of the reversing spool 4, an elastic reset member 5 is further provided between the limiting end of the reversing spool 4 and the spool end cover 3. The two ends of the elastic reset member 5 can be fixedly installed on the limiting end of the reversing spool 4 and the spool end cover 3 respectively, so that when the reversing spool 4 moves leftward, the elastic reset member 5 is compressed, and when the external force is withdrawn, the reversing spool 4 can move rightward for reset under the reset force of the elastic reset member 5 until the limiting end of the reversing spool 4 abuts against the left side wall of the valve sleeve 2.

[0040] The valve housing 1 is provided with an air inlet 13 communicating with the air inlet chamber, and the valve housing 1 is provided with an air outlet 14 communicating with the reversing hole 21; the valve sleeve 2 is provided with a first contact sealing structure 22 at one end of the reversing hole 21 close to the spool end cover 3, and the limiting end of the reversing spool 4 is provided with a second contact sealing structure 41. Under the reset force of the elastic reset member 5, the second contact sealing structure 41 can abut against the first contact sealing structure 22 to form a mechanical line seal or a mechanical surface seal, so as to disconnect the reversing hole 21 from the air inlet chamber 12, so as to disconnect the air inlet 13 from the air outlet 14.

[0041] Specifically, an air inlet 13 is provided on the outer periphery of the small hole position on the left side in the mounting hole 11 of the valve housing 1, which communicates with the air inlet chamber, that is, communicates with the small hole position on the left side in the mounting hole 11. An air outlet 14 is provided on the outer periphery of the large hole position on the right side in the mounting hole 11 of the valve housing 1. The air outlet 14 communicates with the large hole position on the right side in the mounting hole 11, and moreover, the air outlet 14 communicates with the reversing hole 21 on the valve sleeve 2 fixedly installed at the large hole position on the right side in the mounting hole 11, especially communicates with the air outlet chamber 23 of the valve sleeve 2. In this embodiment, the reversing hole 21 of the valve sleeve 2 is a through hole. When there is a gap between the limiting end of the reversing spool 4 and the valve sleeve 2, that is, there is a gap between the second contact sealing structure 41 and the first contact sealing structure 22, the reversing hole 21 communicates with the large hole position on the right side in the mounting hole 11 through the gap between the second contact sealing structure 41 and the first contact sealing structure 22, and further makes the air outlet chamber of the valve sleeve 2 communicate with the air inlet chamber 12 on the valve housing 1, that is to say, the air inlet 13 communicates with the air outlet 14, that is to say, the pneumatic valve is in an open state. When the limiting end of the reversing spool 4 abuts against the valve sleeve 2, the second contact sealing structure 41 can abut against the first contact sealing structure 22 to form a mechanical line seal or a mechanical surface seal, cutting off the communication between the air outlet chamber of the valve sleeve 2 and the air inlet chamber on the valve housing 1, and further cutting off the communication between the reversing hole 21 and the air inlet chamber, so as to realize the disconnection between the air inlet 13 and the air outlet 14.

[0042] Continue to refer to Figure 1 , the trigger opening end of the reversing spool 4 (such asFigure 1 When the right end shown extends outside the valve housing 1 and is pushed by an external force to slide the reversing valve core 4 into the mounting hole 11, that is, the reversing valve core 4 can move leftward under the action of an external force, compressing the elastic reset member 5, so that the second contact sealing structure 41 is separated from the first contact sealing structure 22 with a gap, and then the reversing hole 21 communicates with the large hole position on the right side in the mounting hole 11 through the gap between the second contact sealing structure 41 and the first contact sealing structure 22, that is, the air outlet cavity of the valve sleeve 2 is connected to the air inlet cavity on the valve housing 1, so that the air inlet 13 is connected to the air outlet 14, realizing the triggering and opening of the pneumatic control valve 100; when the reversing valve core 4 is in a free state, that is, when the external driving force does not act on the triggering and opening end of the reversing valve core 4, under the action of the reset force of the elastic reset member 5, the triggering and opening end of the reversing valve core 4 slides out to the outside of the valve housing 1, that is, slides to the right until the second contact sealing structure 41 abuts against the first contact sealing structure 22 to form a line seal or a surface seal for mechanical sealing, disconnecting the reversing hole 21 from the large hole position on the right side in the mounting hole 11, that is, disconnecting the connection between the air outlet cavity 23 of the valve sleeve 2 and the air inlet cavity 12 on the valve housing 1, and further disconnecting the air inlet 13 from the air outlet 14, causing the pneumatic control valve 100 to reset and cut off.

[0043] Continue to refer to Figure 3 Between the valve sleeve 2 and the valve housing 1, an outer peripheral sealing ring 6 is provided, and an inner peripheral sealing ring 7 is also provided between the valve sleeve 2 and the reversing valve core 4. Specifically, two outer peripheral sealing rings 6 are provided between the valve sleeve 2 and the valve housing 1, which can be respectively arranged at the left and right ends of the valve sleeve 2 to perform airtight sealing on the valve sleeve 2 and the valve housing 1; among them, the inner peripheral sealing ring 7 can be arranged at the small hole position on the left side of the reversing hole 21 to seal between the valve sleeve 2 and the reversing valve core 4, avoiding air leakage between the air inlet 13 and the air outlet 14 from leaking out between the valve sleeve 2 and the reversing valve core 4. Among them, both the outer peripheral sealing ring 6 and the inner peripheral sealing ring 7 are O-rings.

[0044] Continue to refer to Figure 4 and Figure 5 As shown in, the valve housing 1 can be a cylinder end cover, that is, the pneumatic control valve 100 is provided on the cylinder end cover, and the cylinder end cover serves as the valve cover of the pneumatic control valve 100 to support and fix components such as the valve sleeve 2 and the valve core end cover 3. Specifically, a rod connection hole 15 is provided on the valve housing 1 to realize the connection between the cylinder and the oil cylinder, and the piston rod can also slide through the rod connection hole 15 to connect the cylinder piston and the oil cylinder piston to realize the linkage between the oil cylinder and the cylinder. An air inlet for the cylinder 16 can also be provided on the valve housing 1 to realize the air intake and exhaust in the cylinder body of the cylinder.

[0045] Continue to refer to Figure 3 、 Figure 6 、 Figure 9 、 Figure 12 and Figure 13, the first contact sealing structure 22 is a concave structure, and the second contact sealing structure 41 is a convex transition contact body. Specifically, the first contact sealing structure 22 is a concave structure provided on the end side of the commutation hole 21 on the left end face of the valve sleeve 2, that is, the end side of the commutation hole 21 recesses toward its outer periphery to form an end-side concave structure; the second contact sealing structure 41 is a convex transition contact body, so that when the limiting end of the commutation valve core 4 abuts against the valve sleeve 2, the second contact sealing structure 41 abuts against the first contact sealing structure 22 to achieve the disconnection between the air inlet and outlet cavities.

[0046] In an implementation manner where the second contact sealing structure 41 and the first contact sealing structure 22 in this embodiment are in contact, as Figure 3 , Figure 6 and Figure 9 shown, the first contact sealing structure 22 is a rounded corner structure, and the second contact sealing structure 41 is a conical structure. Moreover, from the trigger opening end of the commutation valve core 4 to the limiting end of the commutation valve core 4, that is, from right to left as shown in Figure 6 shown, the outer diameter of the second contact sealing structure 41 gradually increases; when the first contact sealing structure 22 abuts against the second contact sealing structure 41, a circumferential loop seal is formed. Specifically, the first contact sealing structure 22 is an inner rounded corner structure provided on the end side of the commutation hole 21, and the second contact sealing structure 41 is a conical structure, especially a frustum structure. As Figure 6 shown, when the first contact sealing structure 22 abuts against the second contact sealing structure 41, the two are in line contact, that is, circular line contact, and a circumferential loop seal can be formed. That is to say, the inner rounded corner structure on the valve sleeve 2 and the taper on the commutation valve core 4 form a line seal to achieve the sealing plug between the air inlet and outlet of the pneumatic control valve 100 through mechanical line seal.

[0047] In another implementation manner where the second contact sealing structure 41 and the first contact sealing structure 22 in this embodiment are in contact, as Figure 12 shown, the second contact sealing structure 41 is a conical structure. Moreover, from the trigger opening end of the commutation valve core 4 to the limiting end of the commutation valve core 4, that is, from right to left as shown in Figure 12From right to left as shown, the outer diameter of the second contact sealing structure 41 gradually increases; the first contact sealing structure 22 is an inward-expanded taper structure, and its taper is smaller than that of the cone structure. When the first contact sealing structure 22 and the second contact sealing structure 41 are in pressing contact, a circumferential loop seal is formed. Specifically, the second contact sealing structure 41 is a cone structure, especially a frustum structure, and the first contact sealing structure 22 is an inward-expanded taper structure, that is, an internal chamfer structure. The taper of the inward-expanded taper structure is smaller than that of the cone structure. That is to say, the angle of this internal chamfer structure is smaller than the angle between the generatrix of the frustum structure and the axis, so that when the first contact sealing structure 22 and the second contact sealing structure 41 are in pressing contact, line contact is formed between the two, that is, circular line contact, and a circumferential loop seal can be formed. That is to say, the internal chamfer structure on the valve sleeve 2 and the taper on the reversing spool 4 form a line seal to achieve the sealing plug between the air inlet and outlet of the pneumatic control valve 100 through mechanical line seal.

[0048] In another implementation manner of the contact between the second contact sealing structure 41 and the first contact sealing structure 22 in this embodiment, as Figure 13 shown, the second contact sealing structure 41 is a cone structure, and from the trigger opening end of the reversing spool 4 to the limit end of the reversing spool 4, that is, from right to left as shown in Figure 12 the outer diameter of the second contact sealing structure 41 gradually increases; the first contact sealing structure 22 is an inward-expanded taper structure adapted to the cone structure. When the first contact sealing structure 22 and the second contact sealing structure 41 are in pressing contact, a mechanical surface seal is formed. Specifically, the second contact sealing structure 41 is a cone structure, especially a frustum structure, as Figure 13 shown, the first contact sealing structure 22 is an inward-expanded taper structure adapted to the second contact sealing structure 41, that is, an internal chamfer structure. The taper of the inward-expanded taper structure is equal to that of the cone structure. That is to say, the angle of this internal chamfer structure is equal to the angle between the generatrix of the frustum structure and the axis, so that when the first contact sealing structure 22 and the second contact sealing structure 41 are in pressing contact, surface contact is formed between the two, that is, frustum surface contact, and a circumferential toroidal seal can be formed. That is to say, the internal chamfer structure on the valve sleeve 2 and the taper on the reversing spool 4 form a surface seal to achieve the sealing plug between the air inlet and outlet of the pneumatic control valve 100 through mechanical surface seal.

[0049] Continue to refer to Figure 3 、 Figure 6 、 Figure 7 、 Figure 9, an air outlet groove 24 is provided on the outer peripheral wall of the valve sleeve 2, which is arranged in a full circle along the circumferential direction of the valve sleeve 2, and the air outlet groove 24 is communicated with the air outlet 14 on the valve housing; a communication hole 25 arranged radially along the valve sleeve 2 is provided on the valve sleeve 2, which is respectively communicated with the air outlet groove 24 and the commutation hole 21 to realize the communication between the air outlet 14 and the commutation hole 21. Specifically, an air outlet groove 24 is provided on the outer peripheral wall of the valve sleeve 2, and the air outlet groove 24 can be a groove structure opening along the outer wall of the valve sleeve 2, forming a U-shaped annular groove structure for communicating the air outlet 14. A communication hole 25 arranged radially along the valve sleeve 2 is provided on the valve sleeve 2, which is respectively communicated with the air outlet groove 24 and the large hole position on the left side of the commutation hole 21 to realize the communication between the air outlet 14 and the large hole position on the left side of the commutation hole 21, that is, to realize the communication between the air outlet 14 and the air outlet cavity 23.

[0050] Continue to refer to Figure 7 , Figure 10 , an outer peripheral seal groove 26 is provided on the outer peripheral wall of the valve sleeve 2 for clamping the outer peripheral seal ring 6; an inner peripheral seal groove 27 is provided on the inner peripheral wall of the valve sleeve 2 for clamping the inner peripheral seal ring 7. Specifically, there can be two outer peripheral seal grooves 26, which are respectively arranged at both ends of the valve sleeve 2. Among them, both the outer peripheral seal groove 26 and the inner peripheral seal groove 27 can be U-shaped groove structures.

[0051] In an implementation manner of the valve sleeve in this embodiment, as Figure 6 and Figure 7 shown, the valve sleeve 2 is an integral structure.

[0052] In another implementation manner of the valve sleeve in this embodiment, as Figures 9 to 11 shown, the valve sleeve 2 can include: a valve sleeve body 28 and a retaining piece 29 detachably connected to the valve sleeve body 28; wherein, an inner peripheral seal groove 26 and an outer peripheral seal groove 27 are formed at the connection between the retaining piece 29 and the valve sleeve body 28. Specifically, as Figure 10 shown, an air outlet groove 24 and a communication hole 25 are provided on the valve sleeve body 28, and an inner peripheral seal groove 26 with a U-shaped structure is provided on the left side; a first contact seal structure 22 is provided on the inner wall of the valve sleeve body 28 at the commutation hole 21. The retaining piece 29 can be buckled on the right side of the valve sleeve body 28, and the two can be detachably connected by a connecting piece such as a bolt, or can be detachably connected by other means, and no limitation is made to it in this embodiment. A limiting clamping shaft 291 can be provided at the left end of the retaining piece 29 to be clamped at the opening groove of the valve sleeve body 28. At the same time, notches with right-end openings are provided on the outer peripheral wall and the inner peripheral wall at the right end of the valve sleeve body 28, so that the retaining piece 29 and the valve sleeve body 28 can enclose to form the inner peripheral seal groove 26 and the outer peripheral seal groove 27, which is convenient for the installation and fixation of the outer peripheral seal ring 6 and the inner peripheral seal ring 7.

[0053] Continue to refer to Figure 3 and Figure 8, on the reversing spool 4, a first elastic guide rod 42 is extended at the limiting end (such as Figure 8 the left end shown), and one end of the elastic reset member 5 (such as Figure 3 the left end shown) is sleeved on the first elastic guide rod 42 to fix the end of the elastic reset member 5. Specifically, the left end of the reversing spool 4 extends leftward with a first elastic guide rod 42 to fix the end of the elastic reset member 5. In this embodiment, a second elastic guide rod (not shown in the figure) may also be provided on the valve core end cover 3, and the other end of the elastic reset member 5 is sleeved on the second elastic guide rod to fix the end of the elastic reset member 5.

[0054] In summary, for the pneumatic control valve with line and surface sealing provided in the embodiment of the present invention, when there is a gap between the limiting end of the reversing spool 4 and the valve sleeve 2, that is, when there is a gap between the second contact sealing structure 41 and the first contact sealing structure 22, the reversing hole 21 and the mounting hole 11 are communicated through the gap between the second contact sealing structure 41 and the first contact sealing structure 22, so that the air outlet cavity of the valve sleeve 2 is connected to the air inlet cavity 12 on the valve housing 1, enabling the air inlet 13 to be communicated with the air outlet 14. That is to say, the pneumatic control valve is in an open state; when the limiting end of the reversing spool 4 abuts against the valve sleeve 2, the second contact sealing structure 41 can abut against the first contact sealing structure 22 to form a mechanical line seal or a mechanical surface seal, cutting off the connection between the air outlet cavity of the valve sleeve 2 and the air inlet cavity on the valve housing 1, and then cutting off the connection between the reversing hole 21 and the air inlet cavity, thereby realizing the disconnection between the air inlet 13 and the air outlet 14. Through line or surface sealing, the setting of the sealing ring, namely the O-ring, is cancelled, and the opening sensitivity of the pneumatic control valve is greatly improved, avoiding the jamming phenomenon of the pneumatic reversing valve.

[0055] Embodiment of an energy-saving hydraulic station:

[0056] See Figure 14, which is a schematic structural diagram of an energy-saving hydraulic station provided by an embodiment of the present utility model. As shown in the figure, the energy-saving hydraulic station 200 includes: a gas-liquid booster pump 210 and a control valve group 220 for controlling the commutation of the gas-liquid booster pump 210; the gas-liquid booster pump 210 includes a pneumatic cylinder 211 and an oil cylinder 212 that are linked; the control valve group 220 includes a pneumatic control reversing valve 221 and two pneumatic control valves 100 arranged at both ends of the pneumatic cylinder 211 and respectively triggered and opened by a cylinder piston 2111. The two pneumatic control valves 100 are respectively a first pneumatic control valve 101 and a second pneumatic control valve 102; a first air inlet P of the pneumatic control reversing valve 221, a second air inlet E of the first pneumatic control valve 101, and a third air inlet F of the second pneumatic control valve 102 are respectively connected to a gas source 300; the pneumatic control reversing valve 221 includes a first control port Y and a second control port Z, and a first air outlet A and a second air outlet B respectively communicated with cylinder cavities 2112 on both sides of the cylinder piston 2111; a third air outlet C of the first pneumatic control valve 101 is connected to the first control port Y. After the first pneumatic control valve 101 is triggered and opened by the cylinder piston 2111, it controls the pneumatic control reversing valve 221 to connect the first air outlet A with the first air inlet P, so that the second air outlet B is connected to the second exhaust port S; a fourth air outlet D of the second pneumatic control valve 102 is connected to the second control port Z. After the second pneumatic control valve 102 is triggered and opened by the cylinder piston 2111, it controls the pneumatic control reversing valve 221 to connect the second air outlet B with the first air inlet P, so that the first air outlet A is connected to the first exhaust port R.

[0057] Specifically, the pneumatic control reversing valve 221 is connected to the oil cylinder 212. Specifically, a through hole is provided on the pneumatic cylinder 211, and the pneumatic cylinder 211 and the oil cylinder 212 are connected through the through hole, such as a rod connection hole 15. A cylinder piston 2111 in contact with the inner wall is arranged in the pneumatic cylinder 211, and an oil cylinder piston in contact with the inner wall is arranged in the oil cylinder 212. The cylinder piston 2111 and the oil cylinder piston are connected by a piston rod, and the piston rod passes through the rod connection hole 15. In this embodiment, both ends of the piston rod are respectively fixedly connected to the oil cylinder pistons in the two oil cylinders 212 on both sides of the pneumatic cylinder 211, and the cylinder piston 2111 is fixedly connected to the piston rod. Of course, each of the two oil cylinder pistons can also be connected to the cylinder piston 2111 through a piston rod to realize the linkage between the pneumatic cylinder 211 and the oil cylinder 212. In this embodiment, a double oil cylinder is taken as an example for illustration. Of course, it can also be a single oil cylinder, and no limitation is made to it in this embodiment. In this embodiment, the piston area of the cylinder piston 2111 is larger than the piston area of the oil cylinder piston. In this embodiment, the piston area of the cylinder piston 2111 can be several times larger than the piston area of the oil cylinder piston, which is convenient for calculating the pressure. For example, if the piston area of the cylinder piston 2111 is 6 times the piston area of the oil cylinder piston, when the pneumatic cylinder 211 outputs a pressure of 1 bar, the oil cylinder 212 outputs a pressure of 6 bar.

[0058] Continue to refer to Figure 14, the first pneumatic control valve 201 is arranged at one end of the pneumatic cylinder 211 (such as Figure 14 the left end shown), the second pneumatic control valve 202 is arranged at the other end of the pneumatic cylinder 211 (such as Figure 14 the right end shown), and the first pneumatic control valve 201 and the second pneumatic control valve 202 are respectively connected to the cylinder piston 2111 so that the cylinder piston 2111 can respectively trigger and open the first pneumatic control valve 201 and the second pneumatic control valve 202.

[0059] Specifically, the structures of the first pneumatic control valve 201 and the second pneumatic control valve 202 can refer to the structure of the above pneumatic control valve 100. The air outlet and the air inlet on the first pneumatic control valve 201 are respectively used as the fourth air outlet D and the third air inlet F. The sliding of the reversing spool of the first pneumatic control valve 201 can make the reversing spool slide to the corresponding position where the fourth air outlet D and the third air inlet F are connected. Among them, the second pneumatic control valve 202 can refer to the first pneumatic control valve 201. Among them, the specific implementation process of the pneumatic control valve can be referred to the above description, and this embodiment will not be elaborated here.

[0060] Since the pneumatic control valve has the above effects, the energy-saving hydraulic station with this pneumatic control valve also has corresponding technical effects.

[0061] It should be noted that in the description of the present invention, the terms indicating directions or positional relationships such as "up", "down", "left", "right", "inside", "outside", etc. are based on the directions or positional relationships shown in the drawings. This is only for convenience of description, rather than indicating or implying that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0062] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0063] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. In this way, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims

1. An air-controlled valve using line-surface sealing, characterized in that: include: Valve housing, valve sleeve, valve core end cover, reversing valve core; among them, The valve housing is provided with a mounting hole, the valve sleeve is arranged in the mounting hole and blocks one opening side of the mounting hole, and the valve core end cover is arranged on the other opening side of the mounting hole; wherein, an air inlet cavity is formed between the valve core end cover and the valve sleeve in the mounting hole of the valve housing; a reversing hole is provided on the valve sleeve, the reversing valve core is slidably inserted into the reversing hole, and the limiting end of the reversing valve core performs reciprocating linear motion between the valve sleeve and the valve core end cover, and the triggering opening end of the reversing valve core can slidably extend to the outside of the valve housing; an elastic reset member is also provided between the limiting end of the reversing valve core and the valve core end cover, for applying a reset force to the reversing valve core; The valve housing is provided with an air inlet connected to the air inlet chamber, and the valve housing is provided with an air outlet connected to the reversing hole; the valve sleeve is provided with a first contact sealing structure at one end of the reversing hole close to the valve core end cover, and the limiting end of the reversing valve core is provided with a second contact sealing structure, and under the action of the resetting force of the elastic resetting member, the second contact sealing structure can press and contact the first contact sealing structure to form a mechanical line seal or a mechanical surface seal, thereby realizing the disconnection between the reversing hole and the air inlet chamber, so as to realize the disconnection between the air inlet and the air outlet.

2. The gas-controlled valve according to claim 1, characterized in that: The first contact sealing structure is a concave structure, and the second contact sealing structure is a convex transition contact body.

3. The gas-controlled valve according to claim 2, characterized in that: The first contact sealing structure is a rounded structure, the second contact sealing structure is a conical structure, and the outer diameter of the second contact sealing structure gradually increases from the trigger opening end of the reversing valve core to the limiting end of the reversing valve core; the first contact sealing structure and the second contact sealing structure form a circumferential ring seal when they are pressed into contact.

4. The gas-controlled valve according to claim 2, characterized in that: The second contact sealing structure is a conical structure, and the outer diameter of the second contact sealing structure gradually increases from the trigger opening end of the reversing valve core to the limiting end of the reversing valve core; the first contact sealing structure is an inwardly expanded tapered structure, and its taper is smaller than the taper of the conical structure. When the first contact sealing structure and the second contact sealing structure are pressed into contact, a circumferential annular seal is formed.

5. The gas-controlled valve according to claim 2, characterized in that: The second contact sealing structure is a conical structure, and the outer diameter of the second contact sealing structure gradually increases from the trigger opening end of the reversing valve core to the limiting end of the reversing valve core; the first contact sealing structure is an inwardly expanded tapered structure adapted to the conical structure, and a mechanical surface seal is formed when the first contact sealing structure is pressed against the second contact sealing structure.

6. The gas-controlled valve according to any one of claims 1 to 5, characterized in that: An air outlet groove is provided on the outer peripheral wall of the valve sleeve, which is arranged along the entire circumference of the valve sleeve, and the air outlet groove is connected with the air outlet on the valve shell; the valve sleeve is provided with connecting holes arranged along the radial direction of the valve sleeve, which are respectively connected with the air outlet groove and the reversing hole, so as to realize the connection between the air outlet and the reversing hole.

7. The gas-controlled valve according to any one of claims 1 to 5, characterized in that: A first elastic guide rod is extended on the reversing valve core at the limit end, and one end of the elastic reset member is sleeved on the first elastic guide rod; a second elastic guide rod is provided on the valve core end cover, and the other end of the elastic reset member is sleeved on the second elastic guide rod.

8. The gas-controlled valve according to any one of claims 1 to 5, characterized in that: The valve sleeve comprises: a valve sleeve body and a baffle detachably connected to the valve sleeve body; wherein an inner peripheral sealing groove and an outer peripheral sealing groove are formed at a connection between the baffle and the valve sleeve body.

9. The gas-controlled valve according to any one of claims 1 to 5, characterized in that: An outer peripheral sealing ring is arranged between the valve sleeve and the valve housing, and an inner peripheral sealing ring is arranged between the valve sleeve and the reversing valve core.

10. An energy-saving hydraulic station, characterized in that: A gas-controlled valve as claimed in any one of claims 1 to 9 is provided.

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