Integrated automatic reciprocating valve

Abstract

The application discloses an integrated automatic reciprocating valve, comprising a valve body, a main valve cavity is arranged in the valve body, a main valve core is arranged in the main valve cavity, a pilot valve cavity is arranged in the valve body, a pilot valve core A and a pilot valve core B are slidably arranged in the pilot valve cavity, the pilot valve core A and the pilot valve core B are arranged at intervals and separate the pilot valve cavity into a pilot cavity A, an air inlet cavity and a pilot cavity B. The automatic switching of the air circuit is realized through the cooperation of the pilot valve core A, the pilot valve core B and the main valve core, the automatic reciprocating valve is automatically circulated and reciprocated, and the automatic reversing control of the actuator is realized. The whole process does not need electrical control, does not need to use pressure signal detection or stroke transmitter and other equipment, the control mode is simple, the problems of faults, short circuits, rust, induced danger and misoperation of the electrically-controlled pilot valve under specific working conditions such as high dust concentration, high humidity, flammable and explosive, strong electromagnetic interference and the like can be effectively avoided, and the applicability and reliability in the complex industrial environment are improved.

Description

Technical Field

[0001] This invention relates to the field of pneumatic control valve technology, and in particular to an integrated automatic reciprocating valve. Background Technology

[0002] In the field of industrial production technology, cylinders are often used as the power source for reciprocating motion. Their extension and retraction are generally controlled by air valves, and in current production, electronically controlled pilot valves are often used to connect to air valves to achieve this control process. However, electronically controlled pilot valves are not suitable for many specific working conditions: in places with high dust concentrations, they are prone to malfunction due to dust; in humid and watery environments such as food processing and cleaning processes and near underground mine drainage systems, they may cause short circuits and component corrosion; in flammable and explosive environments such as chemical workshops involving volatile liquids and underground coal mines with gas, there is a risk of danger caused by electric sparks; and in environments with strong electromagnetic interference, such as around large substations and high-frequency welding workshops, their electronic control systems are easily interfered with and may malfunction.

[0003] Therefore, it is necessary to improve the existing technology. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings and deficiencies of existing technologies by providing an integrated automatic reciprocating valve that requires no electrical control throughout the entire process, and does not require pressure signal detection or stroke transmitters, making the control method simple and reliable.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An integrated automatic reciprocating valve includes a valve body with a main valve chamber. A main valve core is disposed within the main valve chamber. The valve body has a working port A, a working port B2, an air inlet P1, an exhaust port S3, and an exhaust port R5 communicating with the main valve chamber. The two ends of the main valve core form reversing chambers A and B with the inner walls of the two ends of the main valve chamber, respectively. The valve body also has a pilot valve chamber with pilot valve cores A and B slidably disposed within it. Pilot valve cores A and B are spaced apart, dividing the pilot valve chamber into pilot chamber A, an air inlet chamber, and pilot chamber B. The air inlet chamber is connected to an air source. Pilot chamber A is connected to the working port... A is connected, the pilot chamber B is connected to the working port B, the end face area of ​​the pilot valve core A facing the intake chamber is smaller than the end face area facing the pilot chamber A, and the end face area of ​​the pilot valve core B facing the intake chamber is smaller than the end face area facing the pilot chamber B; the pilot valve core A has a third position and a fourth position, and the pilot valve core B has a fifth position and a sixth position. When the pilot valve core A is in the third position and the pilot valve core B is in the fifth position, the intake chamber is connected to the reversing chamber B. When the pilot valve core A is in the fourth position and the pilot valve core B is in the sixth position, the intake chamber is connected to the reversing chamber A.

[0007] Furthermore, the air inlet P is connected to the air source, and both the exhaust ports S and R are connected to the atmosphere; the main valve core slides between a first position and a second position relative to the main valve chamber. When the main valve core is in the first position, the air inlet P is connected to the working port B, and the working port A is connected to the exhaust port R. At this time, the pilot valve core A is in the fourth position, and the pilot valve core B is in the sixth position. When the main valve core is in the second position, the air inlet P is connected to the working port A, and the working port B is connected to the exhaust port S. At this time, the pilot valve core A is in the third position, and the pilot valve core B is in the fifth position.

[0008] Furthermore, a first air passage is provided between the intake chamber and the reversing chamber B, and a second air passage is provided between the intake chamber and the reversing chamber A.

[0009] Furthermore, a control switch is provided in the second air path, the control switch having a seventh position and an eighth position. When the control switch is in the seventh position, the second air path is open; when the control switch is in the eighth position, the second air path is closed.

[0010] Furthermore, a third air passage is provided between the working port A and the pilot cavity A, and a fourth air passage is provided between the working port B and the pilot cavity B.

[0011] Furthermore, the valve body is provided with a main exhaust port, and both exhaust ports S and R are connected to the main exhaust port through a fifth air passage.

[0012] Furthermore, a throttle valve is installed in the fifth air passage.

[0013] Furthermore, a first sealing ring and a second sealing ring are respectively fitted at both ends of the pilot valve core A. The first sealing ring and the second sealing ring cooperate with the inner wall of the pilot valve cavity to form a breathing chamber A. The valve body is provided with a breathing port A for connecting the breathing chamber A with the atmosphere. A third sealing ring and a fourth sealing ring are respectively fitted at both ends of the pilot valve core B. The third sealing ring and the fourth sealing ring cooperate with the inner wall of the pilot valve cavity to form a breathing chamber B. The valve body is provided with a breathing port B for connecting the breathing chamber B with the atmosphere.

[0014] Furthermore, the main exhaust port, breathing port A, and breathing port B are each equipped with a sound-absorbing structure.

[0015] Furthermore, a spring bushing is provided at one end of the main valve core, and the axial degree of freedom of the spring bushing in the main valve cavity is restricted; the main valve core is provided with a first groove and a second groove that cooperate with the spring bushing; when the main valve core is in the first position, the spring bushing cooperates with the first groove, and when the main valve core is in the second position, the spring bushing cooperates with the second groove.

[0016] With the above structure, the beneficial effects of this invention are as follows: The integrated automatic reciprocating valve of this invention includes a valve body, a main valve chamber within the valve body, a main valve core within the main valve chamber, and a pilot valve chamber within the valve body. Pilot valve cores A and B are slidably disposed within the pilot valve chamber, and are spaced apart, dividing the pilot valve chamber into pilot chamber A, an air inlet chamber, and pilot chamber B. This invention achieves air path switching through the mutual cooperation of pilot valve cores A, B, and the main valve core, causing the automatic reciprocating valve to automatically cycle back and forth, thereby realizing automatic reversing control of the actuator. The entire process requires no electrical control, nor does it require pressure signal detection or stroke transmitters. The control method is simple and can effectively avoid problems such as failure, short circuit, corrosion, danger, and malfunction that may occur in electric pilot valves under specific working conditions such as high dust concentration, high humidity, flammability, explosiveness, and strong electromagnetic interference. It can also reduce the reliance on additional detection equipment and improve the applicability and reliability in complex industrial environments. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention, the accompanying drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is an exploded view of the overall structure of the present invention;

[0020] Figure 3 This is a cross-sectional view of the overall structure of the present invention. Figure 1 ;

[0021] Figure 4 This is a cross-sectional view of the overall structure of the present invention. Figure 2 ;

[0022] Figure 5 This is a cross-sectional view of the overall structure of the present invention. Figure 3 ;

[0023] Figure 6 This is a cross-sectional view of the overall structure of the present invention. Figure 4 ;

[0024] Figure 7 This is the invention Figure 6 Enlarged schematic diagram of the structure at point A;

[0025] Figure 8This is a cross-sectional view of the overall structure of the present invention. Figure 5 ;

[0026] Figure 9 This is a cross-sectional view of the overall structure of the present invention. Figure 6 ;

[0027] Figure 10 This is a cross-sectional view of the overall structure of the present invention. Figure 7 ;

[0028] Figure 11 This is a cross-sectional view of the overall structure of the present invention. Figure 8 ;

[0029] Figure 12 This is a cross-sectional view of the valve body of the present invention. Figure 1 ;

[0030] Figure 13 This is a cross-sectional view of the valve body of the present invention. Figure 2 ;

[0031] Figure 14 This is a cross-sectional view of the valve body of the present invention. Figure 3 ;

[0032] Figure 15 This is a schematic diagram of the gas path of the present invention.

[0033] Figures 1 to 15 The winning number is:

[0034] 1. Valve body; 11. Main valve chamber; 111. Reversing chamber A; 112. Reversing chamber B; 113. First plug; 12. Working port A; 13. Working port B; 14. Air inlet P; 15. Exhaust port S; 16. Exhaust port R; 17. Pilot valve chamber; 171. Pilot chamber A; 172. Air inlet chamber; 173. Pilot chamber B; 174. Breathing chamber A; 175. Breathing chamber B; 176. Second plug; 18. Main exhaust port; 191. Breathing port A; 192. Breathing port B; 2. Main valve core; 21. First groove; 22. Second groove; 23. Raised ring; 3. Pilot valve core A; 31. First sealing ring; 32. Second sealing ring; 4. Pilot valve core B; 41. Third sealing ring; 42. Fourth sealing ring; 5. Silencing structure; 6. Spring bushing; 61. Bushing; 62. Spring; 10. First air passage; 20. Second air passage; 201. Control switch; 30. Third air passage; 40. Fourth air passage; 50. Fifth air passage; 501. Throttling valve. Detailed Implementation

[0035] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0036] In the description of this invention, it should be understood that if terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, the term "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0038] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0039] In this invention, unless otherwise explicitly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact, or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0040] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. Where applicable, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this invention are for illustrative purposes only and do not represent the only possible implementation.

[0041] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0042] like Figures 1 to 15As shown, an integrated automatic reciprocating valve includes a valve body 1. A main valve chamber 11 is formed within the valve body 1, and a main valve core 2 is disposed within the main valve chamber 11. The valve body 1 has working ports A12 and B13, an air inlet P14, an exhaust port S15, and an exhaust port R16 communicating with the main valve chamber 11. The two ends of the main valve core 2 form reversing chambers A111 and B112 with the inner walls of the two ends of the main valve chamber 11, respectively. A pilot valve chamber 17 is also formed within the valve body 1. Pilot valve cores A3 and B4 are slidably disposed within the pilot valve chamber 17. The pilot valve cores A3 and B4 are spaced apart and divide the pilot valve chamber 17 into a pilot chamber A171, an air inlet chamber 172, and a pilot chamber B173. The air inlet chamber 172 is connected to an air source. The pilot chamber... A171 is connected to the working port A12, and the pilot chamber B173 is connected to the working port B13. The end face area of ​​the pilot valve core A3 facing the intake chamber 172 is smaller than the end face area facing the pilot chamber A171, and the end face area of ​​the pilot valve core B4 facing the intake chamber 172 is smaller than the end face area facing the pilot chamber B173. The pilot valve core A3 has a third position and a fourth position, and the pilot valve core B4 has a fifth position and a sixth position. When the pilot valve core A3 is in the third position and the pilot valve core B4 is in the fifth position, the intake chamber 172 is connected to the reversing chamber B112. When the pilot valve core A3 is in the fourth position and the pilot valve core B4 is in the sixth position, the intake chamber 172 is connected to the reversing chamber A111. The air inlet P14 is connected to the air source, and the exhaust ports S15 and R16 are both connected to the atmosphere. The main valve core 2 slides between a first position and a second position relative to the main valve chamber 11. When the main valve core 2 is in the first position, the air inlet P14 is connected to the working port B13, and the working port A12 is connected to the exhaust port R16. At this time, the pilot valve core A3 is in the fourth position, the pilot valve core B4 is in the sixth position, and the reversing chamber A111 is connected to the air inlet chamber 172. When the main valve core 2 is in the second position, the air inlet P14 is connected to the working port A12, and the working port B13 is connected to the exhaust port S15. At this time, the pilot valve core A3 is in the third position, the pilot valve core B4 is in the fifth position, and the reversing chamber B112 is connected to the air inlet chamber 172. A first air passage 10 is provided between the intake chamber 172 and the reversing chamber B112, and a second air passage 20 is provided between the intake chamber 172 and the reversing chamber A111. A third air passage 30 is provided between the working port A12 and the pilot chamber A171, and a fourth air passage 40 is provided between the working port B13 and the pilot chamber B173. The valve body 1 is provided with a main exhaust port 18, and both exhaust ports S15 and R16 are connected to the main exhaust port 18 through a fifth air passage 50.

[0043] Based on the above embodiments, the present invention provides an integrated automatic reciprocating valve, including a valve body 1, a main valve chamber 11 within the valve body 1, a main valve core 2 within the main valve chamber 11, and a pilot valve chamber 17 within the valve body 1. Pilot valve cores A3 and B4 are slidably disposed within the pilot valve chamber 17, and are spaced apart, dividing the pilot valve chamber 17 into a pilot chamber A171, an inlet chamber 172, and a pilot chamber B173. The present invention achieves air path switching through the cooperation of pilot valve cores A, B, and the main valve core 2, causing the automatic reciprocating valve to automatically cycle back and forth, thereby achieving automatic reversing control of the actuator. The entire process requires no electrical control, nor does it require pressure signal detection or stroke transmitters. The control method is simple and can effectively avoid problems such as failure, short circuit, corrosion, danger, and malfunction that may occur in electric pilot valves under specific working conditions such as high dust concentration, high humidity, flammability, explosiveness, and strong electromagnetic interference. It can also reduce the reliance on additional detection equipment and improve the applicability and reliability in complex industrial environments.

[0044] Working principle: such as Figure 15As shown, when the main valve core 2 is in the first position, the air inlet P14 is connected to the working port B13, and the working port A12 is connected to the exhaust port R16. The working port B13 supplies air to the actuator and simultaneously supplies air to the pilot chamber B173. At this time, gas enters the pilot chamber B173 through the air inlet P14, the working port B13, and the fourth air passage 40. Because the end face area of ​​the pilot valve core B4 facing the pilot chamber B173 is larger than its end face area facing the air inlet chamber 172, the pilot valve core B4, under the action of the pressure difference, flows towards the side closer to the air inlet chamber 172. The pilot valve core B4 moves from the fifth position to the sixth position, disconnecting the intake chamber 172 from the reversing chamber B112. Simultaneously, the pilot valve core A3 moves from the third position to the fourth position under the pressure of the intake chamber 172, connecting the intake chamber 172 with the reversing chamber A111. At this time, gas enters the reversing chamber A111 through the intake chamber 172, the second air passage 20, and the main valve core 2 moves from the first position to the second position, connecting the intake port P14 with the working port A12 and the working port B13 with the exhaust port S15. While the working port A12 supplies air to the actuator, it also supplies air to the pilot chamber A171. At this time, the gas enters the pilot chamber A171 through the inlet port P14, the working port A12, and the third air passage 30. Since the end face area of ​​the pilot valve core A3 facing the pilot chamber A171 is larger than its end face area facing the inlet chamber 172, the pilot valve core A3 slides closer to the inlet chamber 172 under the action of the pressure difference. That is, the pilot valve core A3 moves from the fourth position to the third position, so that the inlet chamber 172... 72 is disconnected from the reversing chamber A111; at the same time, the pilot valve core B4 moves from the sixth position to the fifth position under the action of the air pressure in the air inlet chamber 172. At this time, the gas enters the reversing chamber B112 through the air inlet chamber 172, the first air passage 10, and the main valve core 2 moves from the second position to the first position. This cycle repeats, thereby realizing the automatic reversing control of the reciprocating valve. The whole process does not require electrical control, nor does it require pressure signal detection or signal generators. The control method is simple.

[0045] In this embodiment, as Figure 12 As shown, one end of the main valve chamber 11 is a blind hole, and the other end is an open hole, which is sealed by a first plug 113. In other preferred embodiments, such as Figure 14As shown, both ends of the main valve chamber 11 can be open, and both openings are sealed by a first plug 113. This structural design greatly reduces the machining difficulty of the main valve chamber 11, improves machining efficiency, and reduces machining costs. In this embodiment, both ends of the pilot valve chamber 17 are open, and both openings are sealed by a second plug 176. This structural design greatly reduces the machining difficulty of the pilot valve chamber 17, improves machining efficiency, and reduces machining costs. The arrangement of the first plug 113 and the second plug 176 enables the automatic reciprocating valve to be detachable, making maintenance more convenient and facilitating daily maintenance.

[0046] In this embodiment, by integrating the main valve core 2, pilot valve core A3, pilot valve core B4, and throttle valve 501 onto the same valve body 1, the space occupied by the overall structure of the automatic reciprocating valve is significantly reduced, avoiding the redundancy and leakage risks caused by pipeline connections during decentralized assembly. Furthermore, the close collaboration between components improves operational reliability. Simultaneously, the highly integrated design ensures the precise matching between the main valve core 2 and the throttle valve 501, resulting in more accurate switching actions and more stable flow control, thus forming an automatic reciprocating valve with high reliability and precision. This highly integrated structure allows it to be flexibly embedded into the pneumatic systems of various devices without complex external adapter components, significantly improving the convenience and flexibility of automatic reciprocating valve applications.

[0047] As another preferred embodiment of the present invention, a control switch 201 is provided on the second air passage 20. The control switch 201 has a seventh position and an eighth position. When the control switch 201 is in the seventh position, the second air passage 20 is turned on; when the control switch 201 is in the eighth position, the second air passage 20 is turned off. In this embodiment, as... Figure 15 As shown, when the control switch 201 is in the seventh position, the second air passage 20 is open, and the automatic reciprocating valve has an automatic switching function. When the control switch 201 is in the eighth position, the second air passage 20 is closed, and the automatic reciprocating valve does not have a switching function, so that the main valve core 2 always remains in the first position. The control switch 201 can be in the form of a toggle valve, a manual button, a jog switch, or a rotary switch, etc., and has an air passage switching function; the specific type is not limited.

[0048] As another preferred embodiment of the present invention, a throttle valve 501 is provided on the fifth air passage 50. In this embodiment, as... Figure 1 and Figure 9As shown, the throttle valve 501 is installed on the fifth air passage 50, and is used to control the automatic reversing speed of the main valve core 2. Specifically, when the throttle valve 501 is open, the exhaust flow increases, thereby accelerating the reciprocating speed of the main valve core 2; conversely, when the throttle valve 501 is open, the exhaust flow decreases, and correspondingly, the reciprocating speed of the main valve core 2 slows down. This adjustment mechanism precisely controls the operating rhythm of the main valve core 2 by changing the exhaust rate, ensuring that the automatic reciprocating valve achieves stable and controllable reversing operation under different operating conditions.

[0049] In another preferred embodiment of the present invention, a first sealing ring 31 and a second sealing ring 32 are respectively fitted at both ends of the pilot valve core A3. The first sealing ring 31 and the second sealing ring 32 cooperate with the inner wall of the pilot valve cavity 17 to form a breathing chamber A174. The valve body 1 is provided with a breathing port A191 for connecting the breathing chamber A174 with the atmosphere. A third sealing ring 41 and a fourth sealing ring 42 are respectively fitted at both ends of the pilot valve core B4. The third sealing ring 41 and the fourth sealing ring 42 cooperate with the inner wall of the pilot valve cavity 17 to form a breathing chamber B175. The valve body 1 is provided with a breathing port B192 for connecting the breathing chamber B175 with the atmosphere. In this embodiment, as... Figure 3 As shown, the breathing port A191 is used to balance the internal and external pressure of the breathing chamber A174, and the breathing port B192 is used to balance the internal and external pressure of the breathing chamber B175. This avoids the problem of excessively high or low pressure in the breathing chambers A174 and B175, prevents negative pressure from compressing the valve body 1 and from "sucking" the first sealing ring 31, the second sealing ring 32, the third sealing ring 41, and the fourth sealing ring 42, ensures the normal operation of the pilot valve core A3 and the pilot valve core B4, reduces the wear of the first sealing ring 31, the second sealing ring 32, the third sealing ring 41, and the fourth sealing ring 42 caused by abnormal force, and thus extends their service life.

[0050] As another preferred embodiment of the present invention, the main exhaust port 18, the breathing port A191, and the breathing port B192 are each provided with a sound-absorbing structure 5. In this embodiment, as... Figure 1As shown, the silencing structure 5 is a silencing plate, whose main function is to reduce the noise generated during gas exhaust. When gas is rapidly discharged through the main exhaust port 18, the breather port A191, and the breather port B192, a large noise will be generated due to airflow disturbance and pressure change. The silencing plate can buffer, disperse, and dampen the airflow, effectively attenuating the sound wave energy, thereby reducing noise pollution during the exhaust process and improving the sound environment quality of the industrial production environment. At the same time, it can also avoid the adverse effects of noise on equipment operators and the surrounding environment to a certain extent. Furthermore, the silencing plate can also act as a barrier, effectively blocking dust and other impurities from the external environment from entering the gas path system, thereby reducing the risk of failure caused by impurity accumulation and extending the service life of the automatic reciprocating valve. In a further embodiment, the silencing plate is specifically a brass particle sintered silencing plate, which is a porous silencing element made of brass particles as raw material through molding and high-temperature sintering. The brass material endows the sound-absorbing plate with excellent corrosion resistance, thermal conductivity, and mechanical strength, enabling it to adapt to complex working conditions such as humidity and high temperature, and ensuring a long service life. The sintered three-dimensional interconnected porous structure has a uniform pore distribution and controllable pore size, which can achieve efficient sound absorption through the friction, reflection, and attenuation of sound waves in the pores, while ensuring smooth gas flow, reducing airflow resistance, and avoiding significant impact on the working efficiency of the pneumatic system. At the same time, the metallic properties of brass particles give it good high temperature resistance and impact resistance, making it less prone to damage due to vibration or temperature changes. The structure is also robust and has no risk of falling off, combining sound absorption effect with structural stability.

[0051] In another preferred embodiment of the present invention, a spring bushing 6 is provided at one end of the main valve core 2, and the axial degree of freedom of the spring bushing 6 within the main valve cavity 11 is restricted. The main valve core 2 is provided with a first groove 21 and a second groove 22 that cooperate with the spring bushing 6. When the main valve core 2 is in the first position, the spring bushing 6 cooperates with the first groove 21; when the main valve core 2 is in the second position, the spring bushing 6 cooperates with the second groove 22. A convex ring 23 is provided between the first groove 21 and the second groove 22. The spring bushing 6 includes two bushings 61 arranged in half and a spring 62 sleeved outside the bushings 61. When the spring bushing 6 passes the convex ring 23, the bushings 61 are opened; after the spring bushing 6 passes the convex ring 23, the bushings 61 close under the elastic force of the spring 62. The function of the spring bushing 6 is to apply resistance to the main valve core 2, so that the switching air pressure reaches a set value to activate the main valve core 2. Furthermore, when the pressure exceeds the set value, the main valve core 2 can quickly switch directions. The spring bushing 6 also ensures that the automatic reciprocating valve has an initial position during assembly. During assembly, if the spring bushing 6 is engaged in the first groove 21, the main valve core 2 is in the first position, at which point the working port B13 is connected to the air inlet P14, and the working port A12 is connected to the exhaust port R16. If the spring bushing 6 is engaged in the second groove 22, the main valve core 2 is in the second position, at which point the working port A12 is connected to the air inlet P14, and the working port B13 is connected to the exhaust port S15.

[0052] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. An integrated automatic reciprocating valve, comprising a valve body (1), a main valve cavity (11) is formed in the valve body (1), a main valve core (2) is arranged in the main valve cavity (11), the valve body (1) is provided with a working port A (12), a working port B (13), an air inlet port P (14), an exhaust port S (15) and an exhaust port R (16) which are in communication with the main valve cavity (11), and the two ends of the main valve core (2) are respectively formed with a reversing cavity A (111) and a reversing cavity B (112) with the inner walls of the two ends of the main valve cavity (11); characterized in that: The valve body (1) is further provided with a pilot valve cavity (17), the pilot valve cavity (17) is slidably provided with a pilot valve core A (3) and a pilot valve core B (4), the pilot valve core A (3) and the pilot valve core B (4) are spaced apart and separate the pilot valve cavity (17) into a pilot cavity A (171), an air inlet cavity (172) and a pilot cavity B (173), the air inlet cavity (172) is communicated with a gas source, the pilot cavity A (171) is communicated with a working port A (12), the pilot cavity B (173) is communicated with a working port B (13), the end surface area of the pilot valve core A (3) on the side facing the air inlet cavity (172) is smaller than the end surface area on the side facing the pilot cavity A (171), and the end surface area of the pilot valve core B (4) on the side facing the air inlet cavity (172) is smaller than the end surface area on the side facing the pilot cavity B (173); the pilot valve core A (3) has a third position and a fourth position, the pilot valve core B (4) has a fifth position and a sixth position, when the pilot valve core A (3) is located at the third position and the pilot valve core B (4) is located at the fifth position, the air inlet cavity (172) is communicated with a reversing cavity B (112), when the pilot valve core A (3) is located at the fourth position and the pilot valve core B (4) is located at the sixth position, the air inlet cavity (172) is communicated with a reversing cavity A (111).

2. An integrated automatic shuttle valve according to claim 1, wherein: The air inlet port P (14) is communicated with a gas source, the air outlet port S (15) and the air outlet port R (16) are both communicated with the atmosphere; the main valve core (2) is slidably arranged between a first position and a second position relative to the main valve cavity (11), when the main valve core (2) is located at the first position, the air inlet port P (14) is communicated with the working port B (13), and the working port A (12) is communicated with the air outlet port R (16), at this time, the pilot valve core A (3) is located at the fourth position, and the pilot valve core B (4) is located at the sixth position; when the main valve core (2) is located at the second position, the air inlet port P (14) is communicated with the working port A (12), and the working port B (13) is communicated with the air outlet port S (15), at this time, the pilot valve core A (3) is located at the third position, and the pilot valve core B (4) is located at the fifth position.

3. An integrated automatic shuttle valve according to claim 1, wherein: A first gas circuit (10) is arranged between the air inlet cavity (172) and the reversing cavity B (112), and a second gas circuit (20) is arranged between the air inlet cavity (172) and the reversing cavity A (111).

4. An integrated automatic shuttle valve according to claim 3, wherein: A control switch (201) is arranged on the second gas circuit (20), the control switch (201) has a seventh position and an eighth position, when the control switch (201) is located at the seventh position, the second gas circuit (20) is turned on, and when the control switch (201) is located at the eighth position, the second gas circuit (20) is turned off.

5. An integrated automatic shuttle valve according to claim 1, wherein: A third gas circuit (30) is arranged between the working port A (12) and the pilot cavity A (171), and a fourth gas circuit (40) is arranged between the working port B (13) and the pilot cavity B (173).

6. An integrated automatic shuttle valve according to claim 1, wherein: The valve body (1) is provided with a total exhaust port (18), the exhaust port S (15) and the exhaust port R (16) are communicated with the total exhaust port (18) through the fifth gas path (50).

7. An integrated automatic shuttle valve according to claim 6, wherein: The fifth gas path (50) is provided with a throttle valve (501).

8. An integrated automatic reciprocating valve according to claim 6, wherein: The two ends of the pilot valve core A (3) are respectively sleeved with the first sealing ring (31) and the second sealing ring (32), the first sealing ring (31) and the second sealing ring (32) cooperate with the inner wall of the pilot valve cavity (17) to form the breathing cavity A (174), the valve body (1) is provided with the breathing port A (191) for communicating the breathing cavity A (174) with the atmosphere; the two ends of the pilot valve core B (4) are respectively sleeved with the third sealing ring (41) and the fourth sealing ring (42), the third sealing ring (41) and the fourth sealing ring (42) cooperate with the inner wall of the pilot valve cavity (17) to form the breathing cavity B (175), the valve body (1) is provided with the breathing port B (192) for communicating the breathing cavity B (175) with the atmosphere.

9. An integrated automatic shuttle valve according to claim 8, wherein: The total exhaust port (18), the breathing port A (191) and the breathing port B (192) are respectively provided with a sound attenuation structure (5).

10. An integrated automatic shuttle valve according to claim 2, wherein: One end of the main valve core (2) is provided with a spring bushing (6), the axial freedom of the spring bushing (6) in the main valve cavity (11) is limited; the main valve core (2) is provided with the first groove (21) and the second groove (22) matched with the spring bushing (6); when the main valve core (2) is located at the first position, the spring bushing (6) is matched with the first groove (21), when the main valve core (2) is located at the second position, the spring bushing (6) is matched with the second groove (22).

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