Pneumatic valve

Abstract

The utility model belongs to the technical field of valves, and discloses a pneumatic valve which comprises a pneumatic valve body, an executing mechanism and a sealing system. The executing mechanism comprises a spring, a piston and a guide sleeve, the piston is provided with an integrally-formed rod body, the rod body penetrates through the guide sleeve and is connected with a sealing gasket, and the spring is matched with compressed air at the first air opening to drive the piston to open or close the middle opening. By arranging the rod body integrally formed with the piston, the structure of the pneumatic valve is simplified, the pneumatic valve is convenient to assemble, and the cost of the pneumatic valve is reduced; and the structural strength of the rod body is effectively improved in a limited space, so that the impact resistance of the rod body is enhanced, and the service life of the pneumatic valve is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field especially relates to a pneumatic valve. BACKGROUND

[0002] In the oil sewage treatment equipment, valve element is often used for controlling the communication or disconnection between each pipeline. As one of the common valve elements, pneumatic valve is widely used in the oil sewage treatment equipment. In order to adapt to the narrow installation space in the oil sewage treatment equipment, the existing pneumatic valve needs to adopt miniaturization design, and the actuating mechanism of the miniaturized pneumatic valve is mostly complex in structure and complicated in assembly, and the valve rod in it is difficult to withstand water pressure impact for a long time in the limited space, and is very easy to be skewed and stuck or even broken, thereby affecting the use of the pneumatic valve. CONTENT OF UTILITY MODEL

[0003] The utility model discloses a pneumatic valve, simple structure, high assembly precision, high strength can effectively prolong the service life of pneumatic valve.

[0004] In order to achieve the purpose, the utility model adopts the following technical scheme: pneumatic valve, including pneumatic valve main part, actuating mechanism and sealing system, pneumatic valve main part includes the valve body and valve seat that link, the valve seat is equipped with the water inlet channel and the water outlet channel, the water inlet channel with the water outlet channel is communicated through the intermediate mouth, the actuating mechanism is installed in the valve body, the actuating mechanism includes spring, piston and guide sleeve, the piston is equipped with the integrative rod body, the rod body passes through the guide sleeve and is connected with the sealing pad, the rod body, the guide sleeve with the inner wall of the valve body surrounds and forms the sealing cavity, the piston is slidably assembled in the sealing cavity and divides the sealing cavity into the upper chamber and the lower chamber, one of the upper chamber with the lower chamber is equipped with the first gas port that communicates with the outside gas source, the other is equipped with the second gas port and internally installs the spring, the spring is in abutment with the piston, the spring and the compressed gas at the first gas port cooperate to drive the piston to open or close the intermediate mouth, the sealing system includes the first sealing assembly and the second sealing assembly, the first sealing assembly is in abutment between the piston and the inner wall of the valve body, the second sealing assembly is in abutment between the rod body and the inner wall of the guide sleeve.

[0005] As preferred, the piston is provided with a reinforcing portion, which is annular and protrudes upward, and the outer peripheral wall of the reinforcing portion is flush with the outer peripheral wall of the piston.

[0006] As preferred, the piston and the rod body are an integrally formed copper alloy piece.

[0007] As preferred, the first sealing assembly comprises two O-rings, the outer peripheral wall of the piston is provided with two annular grooves, the two annular grooves are arranged along the radial direction of the piston, and the O-rings are correspondingly arranged in the annular grooves and abut against the inner wall of the valve body.

[0008] As preferred, the valve body and the valve seat cooperatively form a positioning groove, and the bottom end of the guide sleeve is provided with a positioning portion which is arranged around the guide sleeve and is limited in the positioning groove.

[0009] As preferred, the sealing system further comprises a third sealing assembly which abuts between the guide sleeve and the inner wall of the pneumatic valve body.

[0010] As preferred, the spring is arranged in the upper cavity, and the rod body is provided with a positioning hole in which the spring is limited.

[0011] As preferred, a float rod is arranged in the positioning hole and penetrates the second gas port.

[0012] As preferred, the side wall of the float rod which penetrates the valve body is provided with a scale line.

[0013] As preferred, the actuator further comprises a screw, one end of the rod body away from the piston is provided with a screw hole, the sealing gasket is provided with a through hole, and the screw penetrates the through hole and is connected to the screw hole.

[0014] The pneumatic valve has the advantages that: the rod body is integrally formed with the piston, on one hand, the original valve rod structure is cancelled, the assembly step of connecting the valve rod and the piston is saved, the pneumatic valve structure is effectively simplified, the pneumatic valve is convenient to assemble and the cost of the pneumatic valve is reduced; on the other hand, the coaxial degree of the piston and the rod body can be ensured, the assembly precision of the rod body is improved, the rod body cannot be inclined when being assembled into the guide sleeve, the valve rod is prevented from being blocked and stuck, the piston and the rod body are integrally formed, the structural strength of the rod body can be effectively improved in the limited space, the impact resistance of the rod body is enhanced, and the service life of the pneumatic valve is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a sectional view of the pneumatic valve of the utility model;

[0016] Figure 2 is Figure 1 an enlarged view of A in figure.

[0017] in the figure:

[0018] 100, pneumatic valve body; 110, valve body; 111, upper cavity; 112, lower cavity; 113, first air port; 114, second air port; 115, first groove; 120, valve seat; 121, water inlet channel; 122, water outlet channel; 123, intermediate port; 124, second groove; 130, positioning groove;

[0019] 200, actuator; 210, spring; 220, piston; 221, rod body; 2211, positioning hole; 2212, float rod; 222, reinforcing part; 230, guide sleeve; 231, positioning part; 240, sealing gasket; 250, screw;

[0020] 300, sealing system; 310, first sealing assembly; 320, second sealing assembly; 330, third sealing assembly. DETAILED DESCRIPTION

[0021] The utility model will be described in further detail below in connection with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not to limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0022] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0023] In the utility model, unless otherwise explicitly specified and limited, the first feature "on" or "below" the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0024] In the description of the present embodiment, the terms "upper", "lower", "right", "left", and the like, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used to distinguish in the description, and have no special meaning.

[0025] Referring to Figure 1 As shown in the drawings, according to the pneumatic valve provided by the embodiment of the present application, the pneumatic valve comprises a pneumatic valve body 100, an actuator 200 and a sealing system 300. The pneumatic valve body 100 comprises a valve body 110 and a valve seat 120, and the valve body 110 and the valve seat 120 are bolted. The valve seat 120 is provided with a water inlet channel 121 and a water outlet channel 122. The water outlet channel 122 is vertically upward near one end of the center of the valve seat 120 and forms a middle port 123. The water inlet channel 121 and the water outlet channel 122 are communicated through the middle port 123.

[0026] The actuator 200 is installed in the valve body 110. The actuator 200 comprises a spring 210, a piston 220 and a guide sleeve 230. The outer peripheral wall of the guide sleeve 230 is tightly connected with the inner peripheral wall of the valve body 110. The piston 220 is provided with an integrally formed rod body 221. The rod body 221 penetrates through the guide sleeve 230 and is connected with a sealing gasket 240. The sealing gasket 240 is located above the middle port 123. The outer diameter of the sealing gasket 240 is greater than the hole diameter of the middle port 123.

[0027] The outer peripheral wall of the rod body 221, the top surface of the guide sleeve 230 and the inner wall of the valve body 110 form a sealing cavity. The piston 220 is slidingly assembled in the sealing cavity and divides the sealing cavity into an upper cavity 111 and a lower cavity 112 which are not communicated with each other. One of the upper cavity 111 and the lower cavity 112 is provided with a first gas port 113 which is communicated with an external gas source. The other one is provided with a second gas port 114 and internally installed with the spring 210. The spring 210 abuts against the piston 220. The spring 210 and the compressed gas at the first gas port 113 cooperate to drive the piston 220 to open or close the middle port 123.

[0028] The sealing system 300 comprises a first sealing assembly 310 and a second sealing assembly 320. The first sealing assembly 310 abuts between the piston 220 and the inner wall of the valve body 110. The second sealing assembly 320 abuts between the rod body 221 and the inner wall of the guide sleeve 230. Optionally, the first sealing assembly 310 and the second sealing assembly 320 can select common sealing members such as oil seals, sealing rings, sealing fillings or combinations of the above sealing members, which will not be described here.

[0029] Specifically, the pneumatic valve can set the position of the first air port 113 and the spring 210 according to actual needs. For example, the pneumatic valve needs to be set as a normally closed valve, at this time, the first air port 113 is arranged on the side wall of the lower cavity 112, the second air port 114 is arranged on the side wall of the upper cavity 111, and the spring 210 is installed in the upper cavity 111 and abuts against the piston 220 to drive the sealing gasket 240 to close the intermediate port 123. When the compressed air enters the first air port 113, the compressed air overcomes the resistance of the spring 210 to work, thereby lifting the piston 220 to open the intermediate port 123. For another example, the pneumatic valve needs to be set as a normally open valve, at this time, the first air port 113 is arranged on the side wall of the upper cavity 111, the second air port 114 is arranged on the side wall of the lower cavity 112, and the spring 210 is installed in the lower cavity 112 and abuts against the piston 220 to drive the sealing gasket 240 to leave the intermediate port 123. When the compressed air enters the first air port 113, the compressed air overcomes the resistance of the spring 210 to work, thereby depressing the piston 220 to close the intermediate port 123.

[0030] It can be understood that, by arranging the rod body 221 integrally formed with the piston 220, on the one hand, the original valve rod structure is cancelled, the assembly step of connecting the valve rod and the piston 220 is saved, the structure of the pneumatic valve is effectively simplified, the pneumatic valve assembly is facilitated, and the cost of the pneumatic valve is reduced; on the other hand, the coaxiality of the piston 220 and the rod body 221 can be ensured, thereby improving the assembly precision of the rod body 221, preventing the rod body 221 from being skewed when being assembled into the guide sleeve 230, avoiding the blockage and jamming of the valve rod, and the piston 220 and the rod body 221 being integrally formed can effectively improve the structural strength of the rod body 221 in the limited space, thereby enhancing the impact resistance of the rod body 221 and prolonging the service life of the pneumatic valve. In addition, the rod body 221 and the piston 220 are integrally formed, and the diameter of the rod body 221 can be adaptively increased, for example, the diameter of the rod body 221 is set to be greater than or equal to half of the inner diameter of the valve body 110 (i.e. the diameter of the sealing cavity), thereby greatly reducing the height-diameter ratio of the rod body 221, further improving the rigidity of the rod body 221, reducing the deflection and vibration of the rod body 221, and increasing the stress area of the sealing gasket 240, thereby improving the sealing performance and service life of the valve.

[0031] The actuator 200 further comprises a screw 250, one end of the rod body 221 away from the piston 220 is provided with a screw hole, the sealing gasket 240 is provided with a through hole, the screw 250 is arranged in the through hole and connected to the screw hole, and the head of the screw 250 abuts against the sealing gasket 240.

[0032] Compared with the traditional structure that the outer thread is arranged at the end of the valve rod, the sealing gasket 240 is positioned and fixed by the stepped structure, the gasket and the nut. By directly locking the sealing gasket 240 by the screw 250, the structure of the pneumatic valve can be further simplified, and the pneumatic valve assembly convenience is improved.

[0033] Further, the piston 220 is provided with a reinforcing portion 222, the reinforcing portion 222 is annular and protrudes upward, the outer circumferential wall of the reinforcing portion 222 is flush with the outer circumferential wall of the piston 220, in other words, the reinforcing portion 222 is an annular structure extending from the edge of the piston 220 and away from the guide sleeve 230.

[0034] By arranging the reinforcing portion 222, the strength of the piston 220 can be improved without occupying too much space in the upper cavity 111, and the surface area of the piston 220 can be increased, which facilitates the subsequent arrangement and use of the first sealing assembly 310.

[0035] Further, the piston 220 and the rod body 221 are integrally formed copper alloy parts. Alternatively, the guide sleeve 230, the valve body 110 and the valve seat 120 can also be integrally formed copper alloy parts.

[0036] Arranging the piston 220 and the rod body 221 as integrally formed copper alloy parts can further improve the strength of the piston 220 and prolong the service life of the piston 220. Moreover, the piston 220 made of copper alloy can cooperate with the guide sleeve 230, the valve body 110 and the valve seat 120 made of copper alloy, effectively improving the consistency of the pneumatic valve and reducing the material cost of the pneumatic valve.

[0037] It can be understood that the first sealing assembly 310 includes two O-rings, the outer circumferential wall of the piston 220 is provided with two annular grooves, the two annular grooves are arranged at intervals along the radial direction of the piston 220, and the O-rings are installed in the annular grooves and abut against the inner wall of the valve body 110.

[0038] Arranging the first sealing assembly 310 as two spaced O-rings can simplify the structure of the first sealing assembly 310 and facilitate the assembly of the first sealing assembly 310, while the two O-rings cooperate to achieve double sealing between the piston 220 and the valve body 110, thereby improving the sealing performance between the piston 220 and the valve body 110. The structure of the second sealing assembly 320 can refer to the description of the first sealing assembly 310 above, which will not be repeated here.

[0039] Referring to Figure 2 It can be understood that the valve body 110 and the valve seat 120 cooperate to form a positioning groove 130, the bottom end of the guide sleeve 230 is provided with a positioning portion 231, and the positioning portion 231 is arranged around the guide sleeve 230 and limited in the positioning groove 130. Specifically, the side of the valve body 110 facing the valve seat 120 is provided with a first groove 115, and the side of the valve seat 120 facing the valve body 110 is provided with a second groove 124, the first groove 115 and the second groove 124 are the same in shape and size, and after the valve body 110 and the valve seat 120 are connected, the first groove 115 and the second groove 124 are correspondingly communicated and form the positioning groove 130.

[0040] The positioning groove 130 and the positioning portion 231 are arranged, the positioning portion 231 is clamped into the positioning groove 130, and the installation stability of the guide sleeve 230 can be effectively improved. The positioning groove 130 is formed by cooperation of the valve body 110 and the valve seat 120, that is, the valve body 110 and the valve seat 120 clamp and position the positioning portion 231 at the same time, the structural compactness of the pneumatic valve is effectively improved, and the bottom surface of the guide sleeve 230 does not need to be additionally provided with a positioning structure matched with the valve seat 120, the structure of the guide sleeve 230 is simplified, and the design and processing of the guide sleeve 230 are facilitated.

[0041] Referring to Figure 1 and Figure 2 It can be understood that the sealing system 300 further comprises a third sealing assembly abutting between the guide sleeve 230 and the inner wall of the pneumatic valve body 100. Since the pneumatic valve body 100 is composed of the valve body 110 and the valve seat 120, the third sealing assembly at least comprises two O-rings, one of which abuts between the guide sleeve 230 and the valve body 110, and the other of which abuts between the guide sleeve 230 and the valve seat 120.

[0042] By arranging the third sealing assembly, the third sealing assembly can improve the sealing between the guide sleeve 230 and the valve body 110 and between the guide sleeve 230 and the valve seat 120, avoid leakage of compressed air or medium from the inside of the pneumatic valve body 100, and further improve the overall sealing of the pneumatic valve.

[0043] Referring to Figure 1 It can be understood that the spring 210 is installed in the upper cavity 111, the end of the rod body 221 away from the sealing gasket 240 is provided with a positioning hole 2211, and the spring 210 is limited in the positioning hole 2211. In addition, when the spring 210 is installed in the lower cavity 112, the spring 210 is sleeved on the rod body 221.

[0044] By arranging the positioning hole 2211, the spring 210 can be conveniently positioned and installed, and the installation stability of the spring 210 can be effectively improved.

[0045] Further, when the spring 210 is installed in the upper cavity 111 (that is, when the pneumatic valve is a normally closed valve), the second gas port 114 is also arranged on the side wall of the upper cavity 111. At this time, the second gas port 114 can be arranged directly above the positioning hole 2211 (that is, the second gas port 114, the positioning hole 2211 and the rod body 221 are coaxial), a float rod 2212 is arranged at the center of the positioning hole 2211, and the float rod 2212 penetrates the second gas port 114.

[0046] By setting the float rod 2212 penetrating the second air port 114, when the first air port 113 is connected with compressed air, the piston 220 rises and drives the float rod 2212 to rise, and the user can judge the stroke distance of the piston 220 by observing the rising height of the float rod 2212, and further judge the opening size of the pneumatic valve, thereby improving the user experience.

[0047] Further, the side wall of the float rod 2212 penetrating the valve body 110 is provided with a scale line.

[0048] By setting the scale line, the user can accurately calculate the stroke distance of the piston 220, and further calculate the opening size, compressed air pressure, medium flow rate and other parameters, thereby facilitating more accurate control of the pneumatic valve.

[0049] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not a limitation on the embodiments of the utility model. For ordinary skilled in the art, various obvious changes, readjustment and replacement can be made without departing from the protection scope of the utility model. Here, it is unnecessary and impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A pneumatic valve, characterized by The pneumatic valve body (100) comprises a valve body (110) and a valve seat (120) connected to each other, the valve seat (120) is provided with a water inlet channel (121) and a water outlet channel (122), and the water inlet channel (121) and the water outlet channel (122) are communicated through an intermediate port (123). The actuator (200) is installed in the valve body (110), and the actuator (200) comprises a spring (210), a piston (220) and a guide sleeve (230), the piston (220) is provided with an integrated rod body (221), the rod body (221) penetrates through the guide sleeve (230) and is connected with a sealing gasket (240), the rod body (221), the guide sleeve (230) and the inner wall of the valve body (110) form a sealing cavity, the piston (220) is slidingly assembled in the sealing cavity and divides the sealing cavity into an upper cavity (111) and a lower cavity (112), one of the upper cavity (111) and the lower cavity (112) is provided with a first gas port (113) communicated with an external gas source, the other is provided with a second gas port (114) and internally installed with the spring (210), the spring (210) abuts against the piston (220), and the spring (210) and compressed gas at the first gas port (113) cooperate to drive the piston (220) to open or close the intermediate port (123). The sealing system (300) comprises a first sealing assembly (310) and a second sealing assembly (320), the first sealing assembly (310) abuts between the piston (220) and the inner wall of the valve body (110), and the second sealing assembly (320) abuts between the rod body (221) and the inner wall of the guide sleeve (230). The piston (220) is provided with a reinforcing portion (222), the reinforcing portion (222) is annular and protrudes upward, and the outer peripheral wall of the reinforcing portion (222) is flush with the outer peripheral wall of the piston (220).

2. The pneumatic valve according to claim 1, characterized in that The piston (220) and the rod body (221) are integrated copper alloy parts.

3. The pneumatic valve according to claim 2, characterized in that The first sealing assembly (310) comprises two O-rings, the outer peripheral wall of the piston (220) is provided with two annular grooves, the two annular grooves are arranged in a radial direction of the piston (220) and are spaced apart from each other, and the O-rings are correspondingly installed in the annular grooves and abut against the inner wall of the valve body (110).

4. The pneumatic valve according to any one of claims 1 to 3, characterized in that The valve body (110) and the valve seat (120) cooperatively form a positioning groove (130), and the bottom end of the guide sleeve (230) is provided with a positioning portion (231), the positioning portion (231) is arranged around the guide sleeve (230) and is limited in the positioning groove (130).

5. The pneumatic valve according to any one of claims 1-3, characterized in that The sealing system (300) further comprises a third sealing assembly (330), and the third sealing assembly (330) abuts between the guide sleeve (230) and the inner wall of the pneumatic valve body (100).

6. The pneumatic valve according to any one of claims 1-3, characterized in that ​ 7. The pneumatic valve according to any one of claims 1-3, characterized in that The spring (210) is installed in the upper cavity (111), and the rod body (221) is provided with a positioning hole (2211), and the spring (210) is limited in the positioning hole (2211).

8. The pneumatic valve according to claim 7, characterized in that A float rod (2212) is arranged in the positioning hole (2211), and the float rod (2212) penetrates the second air port (114).

9. The pneumatic valve according to claim 8, characterized in that A scale line is arranged on the side wall of the float rod (2212) penetrating the valve body (110).

10. The pneumatic valve according to any one of claims 1-3, characterized in that The actuating mechanism (200) further comprises a screw (250), one end of the rod body (221) away from the piston (220) is provided with a screw hole, the sealing gasket (240) is provided with a through hole, and the screw (250) penetrates the through hole and is connected to the screw hole.

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