Air cylinder control valve

Abstract

The invention relates to the technical field of air valves, in particular to an air cylinder control valve. Comprising a valve body, and a pilot valve element and a main valve element are slidably arranged in the valve body; a first pilot cavity, a second pilot cavity, a pilot O1 cavity, a pilot A1 cavity, a pilot P1 cavity, a pilot B1 cavity and a pilot O2 cavity are formed by the pilot valve element and the inner wall of the valve body. A main valve P2 cavity, a main valve O3 cavity, a main valve A2 cavity, a main valve B2 cavity and a main valve O4 cavity are formed between the main valve element and the inner wall of the valve body. The main valve element slides in the valve body to switch connection and disconnection of the main valve P2 cavity, the main valve A2 cavity and the main valve B2 cavity. The two ends of the main valve element and the inner wall of the valve body form a first main valve cavity and a second main valve cavity, an outlet of the pilot A1 cavity communicates with the first main valve cavity, and an outlet of the pilot B1 cavity communicates with the second main valve cavity. Rapid reversing of the air cylinder can be achieved; the pilot valve element and the main valve element are arranged in the valve body, integration of the pilot valve and the main valve is achieved, and the sealing performance is guaranteed through the integrally-formed valve body structure.

Description

Technical Field

[0001] The present invention relates to the technical field of gas valves, and in particular to a cylinder control valve. Background Art

[0002] In the field of industrial production technology, cylinders are often used as a power source for reciprocating motion, and the extension and contraction switching of the cylinders is generally controlled by air valves. In existing production, a pilot valve is used to connect the air valve to control the reciprocating motion of the cylinder. The pilot valve and the air valve are connected separately through a pipeline. On the one hand, there are high requirements for sealing performance, and on the other hand, the speed of cylinder switching reaction cannot meet the production rhythm requirements. Therefore, in order to solve the above problems, it is urgent to improve the control valve of the cylinder in actual production to improve the airtightness and switching speed of the control valve. Summary of the invention

[0003] The problem to be solved by the present invention is to provide a cylinder control valve with better sealing performance and faster switching speed.

[0004] In view of the deficiencies of the prior art, the present invention solves the technical problems by adopting a technical solution: a cylinder control valve comprises a valve body, a pilot valve core and a main valve core are slidably arranged in the valve body, and the pilot valve core adjusts and controls the working state of the main valve core; the side walls at both ends of the pilot valve core respectively form a pilot cavity 1 and a pilot cavity 2 with the inner wall of the valve body, and a pilot cavity 2 is formed between the pilot cavity 1 and the pilot cavity 2 by the pilot valve core and the inner wall of the valve body. 1 Cavity, pilot A 1 Cavity, pilot P 1 Cavity, pilot B 1 Cavity and pilot O 2 The main valve core and the inner wall of the valve body form a main valve P 2 Cavity, main valve P 2 There is a main valve O on one side of the cavity 3 Cavity, main valve A 2 The other side of the chamber is equipped with a main valve B 2 Cavity, main valve O 4 The two ends of the main valve core and the inner wall of the valve body form the main valve cavity 1 and the main valve cavity 2; the pilot A 1 The cavity outlet is connected to the main valve cavity 1, pilot B 1 The cavity outlet is connected to the main valve cavity 2, the pilot cavity 1 and the main valve A 2 The chambers are connected to one side of the cylinder, and the other side of the cylinder is connected to the pilot chamber 2 and the main valve B. 2 cavity; when both main valve cavity 1 and main valve cavity 2 are not ventilated, the main valve core is in the middle position; when main valve cavity 1 is ventilated and main valve cavity 2 is not ventilated, the main valve core is in the right position; when main valve cavity 1 is not ventilated and main valve cavity 2 is ventilated, the main valve core is in the left position.

[0005] Preferably, the leading O 2A pilot piston chamber is provided between the pilot chamber and the pilot chamber 2. A pilot piston is provided in the pilot piston chamber for sliding movement. The pilot piston is connected to the end of the pilot valve core. The sliding movement of the pilot valve core in the valve body switches the pilot P 1 Cavity and pilot A 1 Cavity, pilot B 1 The opening and closing of the chamber, the pilot chamber before and after the intake of the pilot A 1 Cavity and pilot O 1 The cavity conduction changes to the leading A 1 Cavity and pilot P 1 Cavity conduction, pilot cavity two intake front and rear pilot B 1 Cavity and pilot O 2 The cavity conduction changes to the leading B 1 Cavity and pilot P 1 The main valve core is in the middle position when the main valve P 2 The cavity is not connected with any chamber. When the main valve P is in the right position 2 Cavity and main valve A 2 The cavity is open, and the main valve P is in the left position 2 Chamber and main valve B 2 Cavity conduction.

[0006] Preferably, spring chamber 1 and spring chamber 2 are respectively provided at both ends of the main valve core, and spring 1 and spring 2 are slidably provided in spring chamber 1 and spring chamber 2; both main valve chamber 1 and main valve chamber 2 are not ventilated, and spring 1 and spring 2 enable the main valve core to be in a neutral state.

[0007] Preferably, a push rod 1 is slidably provided in the main valve chamber 1, and the push rod 1 is connected to the inner wall of the main valve core through a push rod screw sleeve 1, and the end of the push rod 1 close to the spring chamber 1 is sleeved in the spring 1; a push rod 2 is slidably provided in the main valve chamber 2, and the push rod 2 is connected to the inner wall of the main valve core through a push rod screw sleeve 2, and the end of the push rod 2 close to the spring chamber 2 is sleeved in the spring 2.

[0008] Preferably, a manual push rod 1 and a manual push rod 2 are respectively provided at both ends of the pilot valve core, and the manual push rod 1 and the manual push rod 2 are both sealed and slidably connected with the inner wall of the valve body. The manual push rod 1 and the manual push rod 2 switch the main valve P during the sliding process relative to the valve body. 2 Cavity and main valve A 2 Cavity, main valve B 2 The opening and closing of the cavity.

[0009] Preferably, the valve body is provided with a pilot air inlet 1 and a pilot P 1 Air inlet, pilot air inlet 2, pilot air inlet 1 connected to pilot chamber 1, pilot P 1 Air inlet connected to pilot P 1 Cavity, pilot air inlet port 2 is connected to pilot cavity 2; the valve body is also provided with O 2 Exhaust port, O 1 Exhaust port, O 2 Exhaust port, O1 The exhaust ports are connected to the pilot O 2 Cavity, pilot O 1 cavity.

[0010] Preferably, the outer side of the push rod screw sleeve 1 is clamped with the inner side of the main valve core, and the inner diameter of the push rod screw sleeve 1 is smaller than the inner diameter of the spring chamber 1; the outer side of the push rod screw sleeve 2 is clamped with the inner side of the main valve core, and the inner diameter of the push rod screw sleeve 2 is smaller than the inner diameter of the spring chamber 2.

[0011] Preferably, the leading P 1 The cavity is connected to the pilot air source, the main valve P 2 The cavity is connected to the main air source, and the pressure values ​​of the pilot air source and the main air source are constant.

[0012] Preferably, the leading O 1 The connection between the chamber and the main valve chamber 1, the pilot B 1 The connection between the first cavity and the second cavity of the main valve is achieved through a channel integrally formed in the valve body.

[0013] The beneficial effects of the present invention are as follows:

[0014] 1. Integrated structural design: By integrating the pilot valve and the main valve into a single valve body, the problems of poor sealing and slow response speed of the split gas valve are solved, the risk of leakage is reduced, and the switching efficiency is improved.

[0015] 2. Volume ratio optimization: The volume ratio design of the pilot chamber and the main valve chamber (1:10) drives the large-flow gas path through a small air pressure, saving the air source while increasing the cylinder switching speed; reducing energy consumption and improving the response speed.

[0016] 3. Manual push rod redundant control: Manual push rods are set at both ends of the pilot valve core to provide manual reset function when the air pressure is insufficient, which enhances the reliability and applicable scenarios of the system.

[0017] 4. Spring return mechanism: The symmetrical design of the spring chambers at both ends of the main valve core ensures that the main valve core automatically returns to the neutral position, simplifying the control logic. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a front axonometric schematic diagram of the present invention;

[0019] Figure 2 is a rear axonometric schematic diagram of the present invention;

[0020] Figure 3 It is a cross-sectional view of the pilot valve core of the present invention;

[0021] Figure 4 It is a cross-sectional view of the main valve core of the present invention;

[0022] Figure 5 This is a working principle diagram of the present invention;

[0023] Description of reference numerals: 1, cylinder; 11, chamber 1; 12, chamber 2; 13, telescopic rod; 2, valve body; 21, pilot air inlet 1; 22, pilot P 1 Air inlet; 23, pilot air inlet 2; 24, O 2 Exhaust port; 25, O 1 Exhaust port; 26, A 2 Cavity air port; 27, B 2 Cavity air port; 28, O 3 Cavity; 29, P 2 Cavity; 20, O 4 Cavity port; 3, pilot valve core; 31, pilot cavity 1; 32, pilot cavity 2; 33, pilot piston; 34, pilot O 1 Cavity; 35, pilot A 1 Cavity; 36, pilot P 1 Cavity; 37, pilot B 1 Cavity; 38, pilot O 2 Cavity; 39, pilot piston cavity; 41, manual push rod 1; 42, push rod screw sleeve 1; 43, manual push rod 2; 44, push rod screw sleeve 2; 45, channel 1; 46, channel 2; 5, main valve core; 51, main valve P 2 Cavity; 52, main valve O 3 Cavity; 53, main valve A 2 Cavity; 54, main valve B 2 Cavity; 55, main valve O 4 cavity; 56, spring cavity one; 561, spring one; 57, spring cavity two; 571, spring two; 6, main valve cavity one; 61, push rod one; 611, boss one; 62, push rod screw sleeve one; 7, main valve cavity two; 71, push rod two; 711, boss two; 72, push rod screw sleeve two. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0025] In order to solve the problem raised by the background technology center, the present invention integrates the pilot valve and the main valve in the same valve body to achieve the improvement of sealing performance and the improvement of reaction speed. As shown in the figure, the present invention is a cylinder control valve for controlling the reciprocating motion of the cylinder 1, including an integrally cast valve body 2, the two inner cavities of the valve body 2 adopt a stepped structure, and the front of the valve body 2 is provided with a pilot air inlet 21, a pilot P 1 Air inlet 22, pilot air inlet 23, A 2 Cavity port 26 and B 2 The cavity gas port 27 is provided on the back of the valve body 2. 2 Exhaust port 24, O 1 The exhaust port 25 is provided on the bottom of the valve body 2. 3 Cavity 28, P 2 Cavity 29 and O 4 The valve body 2 has a pilot valve core 3 and a main valve core 5 slidingly disposed in the valve body 2; the side walls at both ends of the pilot valve core 3 and the inner wall of the valve body 2 respectively form a pilot cavity 1 31 and a pilot cavity 2 32, and the pilot valve core 3 and the inner wall of the valve body 2 form a pilot cavity 1 31 and a pilot cavity 2 32 between the pilot cavity 1 31 and the pilot cavity 2 32. 1 Cavity 34, pilot A 1 Cavity 35, pilot P 1 Cavity 36, pilot B 1 Cavity 37 and pilot O 2 Cavity 38; Pilot O 2 A pilot piston chamber 39 is provided between the chamber 38 and the pilot chamber 2 32. A pilot piston 33 is provided in the pilot piston chamber 39 for sliding movement. The pilot piston 33 is connected to the end of the pilot valve core 3. 1 Cavity 34 and pilot A 1 Cavity 35 is conducting, pilot A 1 Cavity 35 and pilot P 1 The chamber 36 is sealed and isolated. After the pressure gas is introduced into the pilot chamber 1 31, the pilot valve core 3 is pushed to the right by the pressure gas in the pilot chamber 1 31 and changes into the first working state. In the first working state, the pilot valve core 3 1 Cavity 34 and pilot A 1 Cavity 35 isolated, pilot A 1 Cavity 35 and pilot P 1 After the pressure gas is introduced into the pilot chamber 2 32, the pressure gas in the pilot chamber 2 32 pushes the pilot valve core 3 to move left and switch to the second working state. In the second working state, the pilot B 1 Cavity 37 and pilot O 2 Cavity 38 isolated, pilot P 1 Cavity 36 and pilot B 1 The chamber 37 is open; that is, the pilot valve core 3 slides in the valve body 2 to switch the pilot P 1 Cavity 36 and pilot A 1 Cavity 35, pilot B1 The main valve core 5 and the inner wall of the valve body 2 form a main valve P 2 Chamber 51, main valve P 2 A main valve O is provided on one side of the cavity 51. 3 Cavity 52, main valve A 2 Cavity 53, with main valve B on the other side 2 Cavity 54, main valve O 4 The two ends of the main valve core 5 and the inner wall of the valve body 2 form a main valve cavity 1 6 and a main valve cavity 2 7; the main valve cavity 1 6 is connected to the main valve cavity 2 before the pressure gas is introduced into the main valve cavity 2. 3 Chamber 52 and main valve A 2 Chamber 53 is open, main valve A 2 Chamber 53 and main valve P 2 The main valve cavity 51 is isolated, and after the pressurized gas is introduced into the main valve cavity 6, the gas in the main valve cavity 6 pushes the main valve core 5 to move to the right. The pressurized gas introduced into the main valve cavity 6 corresponds to the first working state of the pilot valve core 3. After the main valve core 5 moves to the right, the main valve, the main valve O 3 Chamber 52 and main valve A 2 Chamber 53 is isolated, main valve A 2 Chamber 53 and main valve P 2 The main valve chamber 51 is open; the main valve B is connected to the main valve chamber 7 before the pressure gas is introduced 2 Chamber 54 and main valve O 4 Chamber 55 is open, main valve B 2 Chamber 54 and main valve P 2 The chamber 51 is isolated, and the pressure gas is introduced into the main valve chamber 2 7, which corresponds to the second working state of the pilot valve core 3. After the pressure gas is introduced into the main valve chamber 2 7, the main valve core 5 moves to the left so that the main valve B 2 Chamber 54 and main valve P 2 Chamber 51 is open, main valve B 2 Chamber 54 and main valve O 4 The main valve core 5 slides in the valve body 2 to switch the main valve P 2 Chamber 51 and main valve A 2 Chamber 53, main valve B 2 The on-off of cavity 54; pilot A 1 The outlet of chamber 35 is connected to the main valve chamber 6, and the pilot P 1 Cavity 36 is connected to the pilot air source. When the pilot valve core 3 is in the first working state, the pilot P 1 Cavity 36, pilot A 1 Cavity 35, main valve cavity 16 conduction; pilot B 1 The outlet of cavity 37 is connected to the main valve cavity 27. When the pilot valve core 3 is in the second working state, the pilot valve P 1 Cavity 36, pilot B 1 Cavity 37 and main valve cavity 27 are connected. Main valve P 2The chamber 51 is connected to the main air source, and the pilot air source and the main air source have constant air pressure. The two ends of the main valve core 5 are respectively provided with a spring chamber 1 56 and a spring chamber 2 57, and a spring 1 561 and a spring 2 571 are slidably arranged in the spring chamber 1 56 and the spring chamber 2 57; when the main valve chamber 1 6 and the main valve chamber 2 7 are both not ventilated, that is, the pilot A 1 Cavity 35 and pilot P 1 Cavity 36 is not conducting, pilot P 1 Cavity 36 and pilot B 1 The cavity 37 is not conducting, and the spring 1 561 and the spring 2 571 interact with each other to make the main valve core 5 in the middle state. When the main valve core 5 is in the middle state, the main valve P 2 Cavity 51 is not connected to any other chamber, main valve A 2 Chamber 53 and main valve O 3 Chamber 52 is open, main valve B 2 Chamber 54 and main valve O 4 The main valve chamber 16 is ventilated and the main valve chamber 27 is not ventilated, that is, the pilot A 1 Cavity 35 and pilot P 1 The chamber 36 conducts the pilot valve core 3 to the first working state, at which time the main valve core 5 is in the right position. 2 Chamber 51 and main valve A 2 Chamber 53 is open, main valve O 3 Cavity 52 is not connected to any other chamber, and main valve B 2 Chamber 54 and main valve O 4 The main valve chamber 16 is not ventilated, and the main valve chamber 27 is ventilated, that is, the pilot P 1 Cavity 36 and pilot B 1 The chamber 37 conducts and the pilot valve core 3 is in the second working state. At this time, the main valve core 5 is in the left position state. When the main valve B is in the left position state 2 Chamber 54 and main valve P 2 Chamber 51 is open, main valve O 4 Cavity 55 is not connected to any other chamber, main valve A 2 Chamber 53 and main valve O 3 The main valve cavity 16 is slidably provided with a push rod 161, which is connected to the inner wall of the main valve core 5 through a push rod screw sleeve 162, and one end of the push rod 161 close to the spring cavity 156 is sleeved in the spring 1561; the main valve cavity 27 is slidably provided with a push rod 271, which is connected to the inner wall of the main valve core 5 through a push rod screw sleeve 272, and one end of the push rod 271 close to the spring cavity 257 is sleeved in the spring 2571.

[0026] The pilot air inlet 21 on the valve body 2 is connected to the pilot chamber 31. 1 The air inlet 22 is connected to the pilot P 1 Cavity 36, pilot air inlet port 23 is connected to pilot cavity 2 32; O on valve body 2 2Exhaust port 24, O 1 The exhaust ports 25 are connected to the pilot O 2 Cavity 38, pilot O 1 Cavity 34 is connected, O 2 Exhaust port 24, O 1 A silencer is provided on the exhaust port 25. 1 The connection between chamber 34 and main valve chamber 6, pilot B 1 The connection between the cavity 37 and the main valve cavity 2 7 is achieved through a channel integrally formed in the valve body 2 .

[0027] The outer side of the push rod screw sleeve 62 is clamped with the inner side of the main valve core 5, and the inner diameter of the push rod screw sleeve 62 is smaller than the inner diameter of the spring chamber 56. A boss 611 is provided at one end of the push rod 61 located in the spring chamber 56. The boss 611 slides along the inner wall of the spring chamber 56 and one end thereof abuts against the spring 561. The outer diameter of the boss 611 is larger than the inner diameter of the push rod screw sleeve 62; the outer side of the push rod screw sleeve 2 72 is clamped with the inner side of the main valve core 5, and the inner diameter of the push rod screw sleeve 2 72 is smaller than the inner diameter of the spring chamber 2 57. A boss 2 711 is provided at one end of the push rod 71 located in the spring chamber 57. The boss 2 711 slides along the inner wall of the spring chamber 57 and one end thereof abuts against the spring 2 571. The outer diameter of the boss 2 711 is larger than the inner diameter of the push rod screw sleeve 2 72.

[0028] A manual push rod 1 41 and a manual push rod 2 43 are respectively provided at both ends of the pilot valve core 3. The manual push rod 1 41 is sealed and slidably sleeved in a push rod screw sleeve 1 42 through an O-ring, and the outer periphery of the push rod screw sleeve 1 42 is in close contact with the inner wall of the valve body 2; the manual push rod 2 43 is sealed and slidably sleeved in a push rod screw sleeve 2 44 through an O-ring, and the outer periphery of the push rod screw sleeve 2 44 is in close contact with the inner wall of the valve body 2. The manual push rod 1 41 and the manual push rod 2 43 are switched during the sliding process relative to the valve body 2. 2 Chamber 51 and main valve A 2 Chamber 53, main valve B 2 The manual push rod 1 41 and the manual push rod 2 43 are set to manually control the pilot valve. When the air pressure on both sides of the pilot valve core 3 is not enough to push the pilot valve core 3 to move, the manual push rod 1 41 and the manual push rod 2 43 are manually pressed to reset the pilot valve core 3. Channel 1 45 connects the pilot A 1 Chamber 35 and main valve chamber 1 6, channel 2 46 connect pilot B 1 Chamber 37 and main valve chamber 27.

[0029] When in use, the gas valve of the present invention is connected to the upstream of the cylinder 1, such as Figure 5 As shown, the piston of the cylinder 1 divides the cylinder 1 into a chamber 11 and a chamber 2 12, and the telescopic rod 13 is arranged on the piston. The pilot chamber 1 31 and the main valve A 2 The chamber 53 is connected to the chamber 11, the pilot chamber 2 32 and the main valve B2 Cavity 54 is connected to chamber 2 12; pilot P 1 Cavity 36 is connected to the pilot air source, main valve P 2 The main gas source is introduced into the chamber 51. The left and right movement of the pilot valve core 3 triggers the movement of the main valve core 5, and the movement of the main valve core 5 realizes the reciprocating motion of the cylinder 1, and the reciprocating motion of the cylinder 1 promotes the movement of the pilot valve core 3. The specific process is as follows: After the piston in the chamber 11 is compressed, the gas in the chamber 11 flows into the pilot chamber 31 through the pilot air inlet 21, and the pilot chamber 31 is filled with pressurized gas and enters the first working state, so that the pilot P 1 Cavity 36 and pilot A 1 Cavity 35 is conducting, pilot P 1 The pilot air source of chamber 36 is supplied through pilot A 1 The gas flows into the main valve chamber 6 through the cavity 35 and the channel 45. The main valve chamber 6 is filled with pressurized gas and pushes the main valve core 5 to move rightward, so that the main valve P 2 Chamber 51 and main valve A 2 Chamber 53 is open, main valve P 2 The main gas source entering chamber 51 passes through main valve A 2 Cavity 53, A 2 The cavity gas port 26 enters the cavity 11; the cavity 11 is filled with the main gas source and then pushes the piston to move toward the cavity 2 12. After the cavity 2 12 is squeezed, the gas therein flows into the pilot cavity 2 32 through the pilot gas inlet 23. After the pilot cavity 2 32 is filled with pressurized gas, the pilot piston 33 and the pilot valve core 3 move leftward and enter the second working state, realizing the pilot P 1 Cavity 36 and pilot B 1 Cavity 37 is open, and the pilot gas source passes through the pilot P 1 Air inlet 22, pilot P 1 Cavity 36, pilot B 1 The main valve cavity 27 is filled with pressurized gas, which pushes the main valve core 5 to move leftward, so that the main valve P 2 Chamber 51 and main valve B 2 Chamber 54 is connected, main valve P 2 The main gas source entering chamber 51 passes through main valve B 2 Cavity 54, B 2 The cavity air port 27 enters the second chamber 12, and after the second chamber 12 is filled with the main air source, the telescopic rod 13 moves toward the first chamber 11 again to make the pilot valve core 3 enter the first working state. Such a reciprocating cycle realizes the reciprocating motion of the cylinder 1.

[0030] Here is a supplementary reasoning about how to achieve fast switching: The structure of the control valve of the present invention is to control the sliding of the main valve core 5 through the pilot valve core 3, and finally complete the reversal of the air circuit. Since the volume ratio of the pilot chamber 1 31 to the main valve chamber 1 6 is about 1:10, and the volume ratio of the pilot chamber 2 32 to the main valve chamber 2 7 is about 1:10. Then lower air pressure and smaller air consumption can be used to control the reversal of the air circuit. If the system air supply pressure and flow rate remain unchanged, the pilot air control valve of the present invention has a faster response speed and smoother reversal than ordinary air control valves. When the system air supply pressure is low, the performance of the air control valve of the present invention is more stable than that of ordinary air control valves. S 1 S is the cross-sectional area of ​​the pilot valve core 3 in the pilot chamber 1 31; 2 The cross-sectional area of ​​the main valve core 5 in the main valve cavity 1 6; the flow of the pilot air inlet 1 21 and the pilot air inlet 23 acts on the pilot cavity 1 31 and the pilot cavity 2 32, instead of directly acting on the main valve cavity 1 6 and the main valve cavity 2 7. It can be inferred from the formula v = Q / S, v is the speed, Q is the intake flow, S is the force cross-sectional area, and when the pilot intake flow remains unchanged, S is set 2 =10S 1 , then the movement speed of the pilot valve core 3 will be much higher than that of the main valve core 5; once the pilot valve core 3 works, it will open a larger flow of control gas to control the movement of the main valve core 5, so that the main valve core 5 moves quickly.

[0031] The cylinder control valve of the present invention integrates the pilot valve and the main valve in the same valve body, which solves the problems of poor sealing and slow response speed of the split-type air valve, reduces the risk of leakage, and improves the switching efficiency; the volume ratio design of the pilot chamber and the main valve chamber (1:10) drives the large-flow air circuit through a small air pressure, saving the air source while achieving an increase in the cylinder switching speed; manual push rods are arranged at both ends of the pilot valve core to provide a manual reset function when the air pressure is insufficient, thereby enhancing the reliability and applicability of the system; the symmetrical design of the spring chambers at both ends of the main valve core ensures that the main valve core automatically resets in the neutral state; the technical solution of the present invention solves the above-mentioned technical problems well, and has strong innovation and practicality.

Claims

1. A cylinder control valve, characterized in that: The invention comprises a valve body (2), wherein a pilot valve core (3) and a main valve core (5) are slidably arranged in the valve body (2), and the pilot valve core (3) adjusts and controls the working state of the main valve core (5); the side walls at both ends of the pilot valve core (3) and the inner wall of the valve body (2) respectively form a pilot cavity 1 (31) and a pilot cavity 2 (32); between the pilot cavity 1 (31) and the inner wall of the valve body (2), the pilot valve core (3) and the inner wall of the valve body (2) form a pilot O1 cavity (34), a pilot A1 cavity (35), a pilot P1 cavity (36), a pilot B1 cavity (37) and a pilot O2 cavity (38); the middle part of the main valve core (5) and the inner wall of the valve body (2) form a main valve P2 cavity (51); one side of the main valve P2 cavity (51) is provided with a main valve O3 cavity (52) and a main valve A2 cavity (53), and the other side is provided with a main valve O3 cavity (52) and a main valve A2 cavity (53). The main valve B2 chamber (54) and the main valve O4 chamber (55) are connected to the main valve core (5); the two ends of the main valve core (5) and the inner wall of the valve body (2) form a main valve chamber 1 (6) and a main valve chamber 2 (7); the outlet of the pilot A1 chamber (35) is connected to the main valve chamber 1 (6), and the outlet of the pilot B1 chamber (37) is connected to the main valve chamber 2 (7); the pilot chamber 1 (31) and the main valve A2 chamber (53) are both connected to the chamber on one side of the cylinder, and the chamber on the other side of the cylinder is connected to the pilot chamber 2 (32) and the main valve B2 chamber (54); when the main valve chamber 1 (6) and the main valve chamber 2 (7) are not ventilated, the main valve core (5) is in a middle position; when the main valve chamber 1 (6) is ventilated and the main valve chamber 2 (7) is not ventilated, the main valve core (5) is in a right position; when the main valve chamber 1 (6) is not ventilated and the main valve chamber 2 (7) is ventilated, the main valve core (5) is in a left position.

2. The cylinder control valve according to claim 1, characterized in that: A pilot piston chamber (39) is provided between the pilot O2 chamber (38) and the pilot chamber 2 (32). A pilot piston (33) is slidably provided in the pilot piston chamber (39). The pilot piston (33) is connected to the end of the pilot valve core (3). The pilot valve core (3) slides in the valve body (2) to switch the pilot P1 chamber (36) and the pilot A1 chamber (35) and the pilot B1 chamber (37). Before and after the pilot chamber 1 (31) is inhaled, the pilot A1 chamber (35) and the pilot O1 chamber (34) are connected to each other, and the pilot valve core (33) is connected to the pilot valve core (3). The pilot A1 chamber (35) is in communication with the pilot P1 chamber (36); the pilot B1 chamber (37) and the pilot O2 chamber (38) are in communication before and after the pilot chamber 2 (32) is inducted, and then the pilot B1 chamber (37) and the pilot P1 chamber (36) are in communication; when the main valve core (5) is in a neutral state, the main valve P2 chamber (51) is not in communication with any chamber; when the main valve core (5) is in a right position, the main valve P2 chamber (51) is in communication with the main valve A2 chamber (53); and when the main valve core (5) is in a left position, the main valve P2 chamber (51) is in communication with the main valve B2 chamber (54).

3. The cylinder control valve according to claim 2, characterized in that: A spring chamber 1 (56) and a spring chamber 2 (57) are respectively provided at both ends of the main valve core (5), and a spring 1 (561) and a spring 2 (571) are slidably provided in the spring chamber 1 (56) and the spring chamber 2 (57); the main valve chamber 1 (6) and the main valve chamber 2 (7) are both airtight, and the spring 1 (561) and the spring 2 (571) enable the main valve core (5) to be in a neutral state.

4. The cylinder control valve according to claim 3, characterized in that: A push rod (61) is slidably provided in the main valve chamber (6), and the push rod (61) is connected to the inner wall of the main valve core (5) through a push rod screw sleeve (62), and one end of the push rod (61) close to the spring chamber (56) is sleeved in the spring (561); a push rod (71) is slidably provided in the main valve chamber (7), and the push rod (71) is connected to the inner wall of the main valve core (5) through a push rod screw sleeve (72), and one end of the push rod (71) close to the spring chamber (57) is sleeved in the spring (571).

5. The cylinder control valve according to claim 1, characterized in that: A manual push rod 1 (41) and a manual push rod 2 (43) are respectively provided at both ends of the pilot valve core (3). The manual push rod 1 (41) and the manual push rod 2 (43) are both sealingly slidably connected to the inner wall of the valve body (2). When the manual push rod 1 (41) and the manual push rod 2 (43) slide relative to the valve body (2), the main valve P2 chamber (51) and the main valve A2 chamber (53) and the main valve B2 chamber (54) are switched on and off.

6. The cylinder control valve according to claim 1, characterized in that: The valve body (2) is provided with a pilot air inlet port 1 (21), a pilot P1 air inlet port (22), and a pilot air inlet port 2 (23); the pilot air inlet port 1 (21) is connected to the pilot chamber 1 (31), the pilot P1 air inlet port (22) is connected to the pilot P1 chamber (36), and the pilot air inlet port 2 (23) is connected to the pilot chamber 2 (32); the valve body (2) is also provided with an O2 exhaust port (24) and an O1 exhaust port (25); the O2 exhaust port (24) and the O1 exhaust port (25) are connected to the pilot O2 chamber (38) and the pilot O1 chamber (34), respectively.

7. The cylinder control valve according to claim 4, characterized in that: The outer side of the push rod screw sleeve 1 (62) is clamped with the inner side of the main valve core (5), and the inner diameter of the push rod screw sleeve 1 (62) is smaller than the inner diameter of the spring chamber 1 (56); the outer side of the push rod screw sleeve 2 (72) is clamped with the inner side of the main valve core (5), and the inner diameter of the push rod screw sleeve 2 (72) is smaller than the inner diameter of the spring chamber 2 (57).

8. The cylinder control valve according to claim 1, characterized in that: The pilot P1 chamber (36) is connected to the pilot air source, and the main valve P2 chamber (51) is connected to the main air source. The air pressure values ​​of the pilot air source and the main air source are constant.

9. The cylinder control valve according to claim 8, characterized in that: The connection between the pilot O1 chamber (34) and the main valve chamber 1 (6), and the connection between the pilot B1 chamber (37) and the main valve chamber 2 (7) are achieved through channels integrally formed in the valve body (2).

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