Flow-improved pneumatic electromagnetic valve

Abstract

The utility model discloses a flow-improved pneumatic electromagnetic valve, and belongs to the technical field of electromagnetic valves. Comprising a valve body, the valve body is provided with a main hole formed in the axis direction, a plurality of valve body sealing grooves are formed in the main hole at intervals, and openings in the two ends of each valve body sealing groove are in transition through cambered surfaces and form valve body transition fillets; the valve rod can be movably arranged in the main hole in the axial direction, a plurality of sets of sealing parts which are arranged in an outwards-protruding mode are arranged on the peripheral wall of the valve rod at intervals, one set of sealing parts is composed of two annular protruding parts, a gap is reserved between the two annular protruding parts, a valve rod sealing groove is formed between the two annular protruding parts, and the outer edges of the annular protruding parts are in arc surface transition and form valve rod transition fillets; and the distance between the outermost convex point of the transition fillet of the valve body and the outermost convex point of the transition fillet of the valve rod is the shortest linear distance, and a through-flow section for gas to pass through is formed between the outermost convex point of the transition fillet of the valve body and the outermost convex point of the transition fillet of the valve rod. Through the design of the valve body transition fillets, the through-flow section is enlarged under the condition that the size of the electromagnetic valve is not changed, and therefore higher flow is obtained.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of electromagnetic valve, concretely relates to a flow improved pneumatic electromagnetic valve. BACKGROUND

[0002] Direction control electromagnetic valve is a key component in many automation systems, and its performance directly affects the efficiency and capacity of the entire system. When selecting and using electromagnetic valves, several key technical indicators need to be considered: width, flow, response time, and opening and closing pressure, etc. Among them, there is a positive correlation between the width and flow of the electromagnetic valve, that is, the larger the width, the greater the flow that can be theoretically achieved, which means that it can drive a larger load.

[0003] However, increasing the width also requires more installation space, which is not ideal in many application scenarios, especially in fields such as the semiconductor industry, which often prefer to use smaller electromagnetic valves.

[0004] The 4V200 series electromagnetic valve on the current market has a width of 22mm and a flow of 1000L / min, while the 4V100 series provides a flow of 600L / min with a width of 18mm. In view of the limited installation space, manufacturers strive to increase the flow of the electromagnetic valve while maintaining or reducing its width. SUMMARY

[0005] The utility model provides a compact structure, flow improved pneumatic electromagnetic valve with large flow.

[0006] The utility model can be realized by the following technical schemes:

[0007] A flow improved pneumatic electromagnetic valve, comprising:

[0008] A valve body having a main hole opened along the axial direction, a plurality of valve body sealing grooves are arranged on the main hole, and the openings at both ends of the valve body sealing groove are transitioned by an arc surface and form a valve body transition fillet;

[0009] A valve rod movably arranged in the main hole along the axial direction, a plurality of groups of sealing parts arranged on the outer peripheral wall of the valve rod, a group of sealing parts composed of two annular convex parts, and a gap formed between the two annular convex parts and a valve rod sealing groove, the outer edge of the annular convex part is transitioned by an arc surface and forms a valve rod transition fillet, wherein,

[0010] The outermost convex point of the valve body transition fillet and the outermost convex point of the valve rod transition fillet are the shortest straight line distance between them, and form a through-flow cross section for gas passing through.

[0011] As a further improvement of the utility model, the valve rod sealing groove is internally provided with a first sealing element, when the annular convex part is located in the valve body sealing groove, the first sealing element is sealingly connected with the inner wall of the valve body sealing groove.

[0012] As a further improvement of the utility model, the outer end face of the first sealing element is set as a gothic arc face.

[0013] As a further improvement of the utility model, the inner end face of the first sealing element is set as an arc face and forms an inner sealing arc face.

[0014] As a further improvement of the utility model, the side face of the first sealing element is provided with a groove.

[0015] As a further improvement of the utility model, the side face of the first sealing element is further provided with a convex part, and the convex part is close to the inner sealing arc face.

[0016] As a further improvement of the utility model, the annular convex part is further provided with an arc face, and the valve rod transition fillet is transitionally connected with the outer peripheral wall of the valve rod through the arc face.

[0017] As a further improvement of the utility model, the two ends of the valve body are respectively provided with an electromagnetic end cover and an end cover, wherein,

[0018] The electromagnetic end cover is internally provided with a piston, the end cover is internally provided with a first spring, and the two ends of the valve rod are respectively abutted with the piston and the first spring.

[0019] As a further improvement of the utility model, the electromagnetic end cover is connected with a pilot valve, wherein,

[0020] When the pilot valve is powered on, airflow flows into the electromagnetic end cover through the pilot valve and pushes the piston to move, so as to drive the valve rod to move;

[0021] When the pilot valve is powered off, the airflow no longer pushes the piston forward, and the valve rod and the piston are reset under the action of the first spring.

[0022] As a further improvement of the utility model, the valve body has an air inlet, a first working port and a second working port, wherein,

[0023] When the pilot valve is powered off, the air inlet is communicated with the first working port;

[0024] When the pilot valve is powered on, the valve rod moves to the air inlet and the second working port are communicated.

[0025] Compared with the prior art, the utility model has the beneficial effects that:

[0026] 1. Optimized flow cross-section and large flow rate: By designing the transition fillet of the valve body, the flow cross-section is expanded without changing the volume of the electromagnetic valve, thereby achieving a higher flow rate, which not only improves the working efficiency of the electromagnetic valve, but also enhances its performance in practical applications.

[0027] 2. Prolonged service life of the electromagnetic valve: Considering that the first seal on the valve rod moves along the transition fillet of the valve body during the switching process of the electromagnetic valve, the design of the transition fillet of the valve body can reduce wear and tear, thereby improving the service life of the electromagnetic valve.

[0028] 3. Balancing valve rod strength and flow rate: The design of the transition fillet of the valve rod reduces the width of the annular protrusion along its axial direction, further expanding the area of the flow cross-section between the annular protrusion and the transition fillet of the valve body, thereby increasing the flow rate of the electromagnetic valve. At the same time, the design of the inner sealing circular arc surface on the annular protrusion ensures the strength of the valve rod and prevents failure caused by high-pressure gas or long-term use.

[0029] 4. Enhanced sealing and reliability: The outer end surface of the first seal is set as a Gothic circular arc surface, ensuring good sealing and reducing friction, which reduces the wear of the seal. At the same time, the groove structure of the first seal can automatically compensate for the interference, improving the reliability and durability of the seal.

[0030] 5. Double sealing effect: The inner end surface of the first seal is set as an arc surface and forms an inner sealing circular arc surface, and the side surface of the first seal is also provided with a protrusion. At this time, the sealing circular arc surface of the first seal forms the first sealing line, and the protrusion forms the second sealing line. Through the cooperation of the protrusion and the inner sealing circular arc surface, double sealing protection is formed to ensure the sealing performance between the valve rod and the first seal. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a structure schematic view of the flow improved pneumatic electromagnetic valve of the embodiment one of the utility model;

[0032] Figure 2 is a sectional view of the flow improved pneumatic electromagnetic valve of the embodiment one of the utility model;

[0033] Figure 3 is a sectional view of the valve body of the embodiment one of the utility model; Figure 2

[0034] Figure 4 is a sectional view of the electromagnetic end cover of the utility model;

[0035] Figure 5

[0036] Figure 6 ​​is a sectional view of the first sealing element of the utility model;

[0037] Figure 7 is a structural schematic view of the first sealing element of the utility model;

[0038] Figure 8 is a sectional view of the flow improved pneumatic electromagnetic valve of the second embodiment of the utility model;

[0039] Figure 9 is a sectional view of the flow improved pneumatic electromagnetic valve of the third embodiment of the utility model;

[0040] Figure 10 is a through-flow cross section schematic view of the prior art pneumatic electromagnetic valve.

[0041] In the figure, 100, valve body;101, air inlet;102, first working port;103, second working port;110, valve body sealing groove;111, valve body transition fillet;1111, straight line part;120, valve rod;121, annular convex part;1211, valve rod transition fillet;1212, arc surface;122, second spring;130, valve rod sealing groove;140, first sealing element;141, gothic arc surface;142, inner sealing arc surface;143, convex;144, groove;150, second sealing element;160, electromagnetic end cover;161, piston;170, end cover;171, first spring;180, pilot valve. DETAILED DESCRIPTION

[0042] The following is the specific embodiment of the utility model and further describes the technical method of the utility model in combination with the drawings, but the utility model is not limited to these embodiments.

[0043] Embodiment one

[0044] As Figures 1-7 shown, embodiment one provides a flow improved pneumatic electromagnetic valve, the electromagnetic valve is single electric control electromagnetic valve, comprising:

[0045] Valve body 100, it has the main hole that sets up along the axial direction, the main hole is provided with a plurality of valve body sealing grooves 110 at intervals, the opening at both ends of valve body sealing groove 110 is through arc surface transition and forms valve body transition fillet 111;

[0046] Valve rod 120, it is movably arranged in the main hole along the axial direction, the outer peripheral wall of valve rod 120 is provided with a plurality of groups of sealing parts of outer convex setting at intervals, a group of sealing parts is composed of two annular convex parts 121, and the gap is formed valve rod sealing groove 130 between two annular convex parts 121, and the outer edge of annular convex part 121 is through arc surface transition and forms valve rod transition fillet 1211, wherein,

[0047] The shortest straight line distance between the valve body transition fillet 111 and the valve stem transition fillet 1211 forms a flow cross section for the gas to pass through.

[0048] It should be noted that, as Figure 10 shown, in the prior art, the opening of the valve body sealing groove 110 is connected to the inner wall of the air passage through a bevel, in this case, the distance between the valve stem 120 and the bevel is the flow cross section.

[0049] In comparison, as Figure 3 shown, the valve body 100 provided by the present embodiment cancels the setting of the bevel, at this time, the size of the flow cross section formed between the valve body transition fillet 111 and the valve stem transition fillet 1211 is larger than that of the flow cross section formed between the valve stem 120 and the bevel in the prior art, thereby increasing the flow of the electromagnetic valve in the case of the same size electromagnetic valve.

[0050] In addition, it is worth mentioning that the setting of the valve stem transition fillet 1211 makes the width of the annular protrusion 121 along its axis direction decrease, further expanding the area of the flow cross section between it and the valve body transition fillet 111, thereby increasing the flow of the electromagnetic valve, but the decrease in width will cause the strength to decrease, to solve this problem, the outer side surface of the annular protrusion 121 is set as an arc surface 1212, the valve stem transition fillet 1211 is connected to the outer peripheral wall of the valve stem 120 through the arc surface 1212, thereby playing the purpose of supplementing the strength, avoiding the failure of the electromagnetic valve in the process of passing high-pressure gas or running to the end of life.

[0051] In addition, as Figure 3 shown, the valve body transition fillet 111 has a straight part 1111, the two ends of the straight part 1111 are connected to the inner wall of the valve body 100 through arc surfaces respectively, the included angle between the straight part and the inner wall of the valve body sealing groove 130 is in the range of 35°-50°, under this angle design, the size of the flow cross section can be further expanded, thereby ensuring the maximum flow, at the same time, guiding the gas to pass through the flow cross section more smoothly, improving the overall fluid dynamics performance.

[0052] In actual application process, the 18mm width large flow electromagnetic valve can replace the 22mm valve width 4V200 series electromagnetic valve, the structure is compact, the volume is smaller, and the flow is increased at the same time.

[0053] Preferably, the valve stem sealing groove 130 is provided with a first sealing element 140, when the annular protrusion 121 is located in the valve body sealing groove 110, the first sealing element 140 is in sealing connection with the inner wall of the valve body sealing groove 110, it is worth mentioning that when the solenoid valve is switched, with the movement of the valve stem 120, the first sealing element 140 will enter the valve body sealing groove 110 along the valve body transition fillet 111 to seal the passage, in this process, due to the setting of the valve body transition fillet 111, the resistance when the first sealing element 140 passes through can be reduced, and the service life of the solenoid valve is prolonged.

[0054] Preferably, as shown in Figure 6 The outer end face of the first sealing element 140 is provided with a gothic arc surface 141, which is different from the traditional circular arc surface, which is formed by the intersection of two symmetrical circular arcs, and the intersection point of the circular arcs forms the top point of the pointed arch, wherein the distance between the centers of the two intersecting circular arcs of the gothic arc surface 141 is between 0.05-0.15mm, at this time the top point of the pointed arch can ensure that the pressure is not too large on the basis of ensuring the sealing performance, that is, the contact area between the first sealing element 140 and the valve body sealing groove 110 is only concentrated at the top point of the pointed arch, thereby reducing the friction force when the first sealing element 140 and the valve body sealing groove 110 slide relative to each other, and prolonging the service life of the first sealing element.

[0055] Preferably, the inner end face of the first sealing element 140 is provided with an arc surface to form an inner sealing circular arc surface 142, and the side surface of the first sealing element 140 is also provided with a protrusion 143, which is close to the inner sealing circular arc surface 142, at this time the sealing circular arc surface of the first sealing element 140 forms the first sealing line, and the protrusion 143 forms the second sealing line, through the cooperation of the protrusion 143 and the inner sealing circular arc surface 142, double sealing protection is formed to ensure the sealing performance between the valve stem 120 and the first sealing element 140.

[0056] Preferably, the side surface of the first sealing element 140 is provided with a groove 144 (the groove 144 is located in the thickness direction of the first sealing element 140), it should be pointed out that in the process of long-life test of the solenoid valve, the pressure of the first sealing element 140 will gradually decrease due to its wear, at this time the groove 144 can automatically compensate the interference, under the action of air pressure, the groove 144 will automatically widen the first sealing element 140 along its width direction, so as to ensure the sealing performance.

[0057] Specifically, as shown in Figure 3As shown, when the valve stem 120 moves to the right, the first seal 140 contacts the valve body sealing groove 110 and forms a seal. Due to the friction between the two contact surfaces, the end of the first seal 140 where the gothic arc surface 141 is located is deflected to the left. At this time, part of the gas will enter the gap between the right side of the first seal 140 and the annular protrusion 121, and enter the groove 144 on the right side of the first seal 140. Under the action of the gas flow, the front end of the groove 144 on the right side of the first seal 140 will be pushed outward, causing the first seal 140 to be "stretched". In this way, the part of the gothic arc surface 141 that is worn out is compensated for, thereby prolonging the service life of the first seal 140.

[0058] In addition, the valve stem 120 is provided with a second seal 150 near both ends. The second seal 150 is provided to seal the two valve body sealing grooves 110 on the outermost side of the valve body 100, ensuring that the gas does not leak.

[0059] Preferably, the valve body 100 is provided with an electromagnetic end cover 160 and an end cover 170 at both ends, respectively, wherein,

[0060] The electromagnetic end cover 160 is provided with a piston 161, and the end cover 170 is provided with a first spring 171. The two ends of the valve stem 120 abut against the piston 161 and the first spring 171, respectively.

[0061] Preferably, the electromagnetic end cover 160 is connected with a pilot valve 180, wherein,

[0062] When the pilot valve 180 is powered on, the gas flows into the electromagnetic end cover 160 through the pilot valve 180 and pushes the piston 161 to move, thereby driving the valve stem 120 to move;

[0063] When the pilot valve 180 is powered off, the gas no longer pushes the piston 161 forward, and the valve stem 120 and the piston 161 are reset under the action of the first spring 171.

[0064] Preferably, the valve body 100 has an air inlet 101, a first working port 102, and a second working port 103, wherein,

[0065] When the pilot valve 180 is powered off, the air inlet 101 is in communication with the first working port 102;

[0066] When the pilot valve 180 is powered on, the valve stem 120 moves to the position where the air inlet 101 is in communication with the second working port 103.

[0067] Specifically, the operation process of the electromagnetic valve is described as follows:

[0068] 1. When the pilot valve 180 is de-energized, the valve stem 120 is on the left side under the action of the first spring 171. At this time, the gas in the solenoid valve inlet 101 is connected to the first working port 102, that is, the actuator driven by the first working port 102 works.

[0069] 2. When the pilot valve 180 is energized, the piston 161 inside the solenoid end cover 160 pushes the valve stem 120 to move toward one end of the end cover 170 and stop, thereby connecting the gas in the solenoid valve inlet 101 to the second working port 103, that is, the actuator driven by the second working port 103 works.

[0070] Example 2

[0071] like Figure 8 As shown, the difference between Embodiment 2 and Embodiment 1 is that Embodiment 2 provides a dual-electro-controlled solenoid valve, with solenoid end caps 160 and pilot valves 180 installed at both ends of the valve body 100. Specifically, its operation process is described as follows:

[0072] 1. When the pilot valve 180 on the left side of the solenoid valve is energized, the piston 161 of the left solenoid end cover 160 pushes the valve stem 120 to the right and stops, connecting the gas in the air inlet 101 to the second working port 103, that is, the actuator driven by the second working port 103 works.

[0073] 2. When the pilot valve 180 on the right side of the solenoid valve is energized, the piston 161203 of the right solenoid end cover 160 pushes the valve stem 120 to the left and stops, connecting the gas in the air inlet 101 to the first working port 102, that is, the actuator driven by the first working port 102 works.

[0074] Example 3

[0075] like Figure 9 As shown, the difference between Embodiment 3 and Embodiments 1 and 2 is that Embodiment 3 provides a 2x two-position three-normally closed valve, the operation of which is described as follows:

[0076] 1. When both pilot valves 180 on the left and right sides are de-energized, the valve stem 120 on the left side is in the left position under the action of the second spring 122 on the left side, and the valve stem 120 on the right side is in the right position under the action of the second spring 122 on the right side. At this time, the gas in the air inlet 101 is sealed by the two second seals 150.

[0077] 2. When only the left pilot valve 180 is energized, the piston 161 inside the left electromagnetic end cover 160 pushes the left valve stem 120 to the right and stops, that is, the gas in the air inlet 101 is connected to the second working port 103, and the actuator driven by the second working port 103 works.

[0078] 2、When only the right pilot valve 180 is powered, the piston 161 inside the right electromagnetic end cover 160 pushes the right valve rod 120 to move left and stop, that is, the gas in the air inlet 101 is communicated with the first working port 102, and the actuator driven by the first working port 102 works;

[0079] 4、When the left and right pilot valves 180 are powered, the piston 161 inside the right electromagnetic end cover 160 pushes the right valve rod 120 to move left and stop, that is, the gas in the air inlet 101 is communicated with the first working port 102, and the actuator driven by the first working port 102 works, and at the same time, the piston 161 inside the left electromagnetic end cover 160 pushes the left valve rod 120 to move right and stop, that is, the gas in the air inlet 101 is communicated with the second working port 103, and the actuator driven by the second working port 103 works, that is, the gas in the air inlet 101 is communicated with the first working port 102 and the second working port 103 at the same time, and the actuators driven by the first working port 102 and the second working port 103 work at the same time.

[0080] The technical means disclosed in the utility model scheme is not limited to the technical means disclosed in the above technical means, and also includes technical schemes composed of any combination of the above technical features. The above is the specific implementation manner of the utility model, and it should be pointed out that for ordinary skilled persons in the technical field, some improvements and refinements can be made without departing from the principle of the utility model, and these improvements and refinements are also regarded as the protection scope of the utility model.

[0081] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications also change accordingly.

[0082] In addition, the description of "one", "another", "one" and the like in the utility model is only used for description purpose, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "one" and "another" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0083] In the utility model, unless another definite provision and limitation, the term "connect", "fix" and so on should do the broad sense understanding, for example, "fix" can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electric connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two element inside's intercommunication or two element's mutual action relation, unless another definite limitation.For the ordinary skill in the art, the specific meaning of the above-mentioned term in the utility model can be understood according to the specific circumstances.

[0084] In addition, the technical solutions of various embodiments of the present application can be combined with each other, but must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, also not within the protection scope required by the present application.

Claims

1. A flow-modifying pneumatic solenoid valve characterized by, The utility model relates to a valve body, a valve rod and a first seal, and belongs to the technical field of valves. The utility model discloses a valve body, a valve rod and a first seal, and belongs to the technical field of valves. The utility model discloses a valve body, a valve rod and a first seal, and belongs to the technical field of valves. The utility model discloses a valve body, a valve rod and a first seal, and belongs to the technical field of valves.

2. A flow improved pneumatic solenoid valve according to claim 1, characterized in that, The utility model discloses a valve body, a valve rod and a first seal, and belongs to the technical field of valves.

3. A flow improved pneumatic solenoid valve according to claim 2, characterized in that The utility model discloses a valve body, a valve rod and a first seal, and belongs to the technical field of valves.

4. The flow improved pneumatic solenoid valve according to claim 2, wherein The utility model discloses a valve body, a valve rod and a first seal, and belongs to the technical field of valves.

5. The flow improved pneumatic solenoid valve according to claim 2, wherein The utility model discloses a valve body, a valve rod and a first seal, and belongs to the technical field of valves.

6. The flow improved pneumatic solenoid valve according to claim 4, wherein The utility model discloses a valve body, a valve rod and a first seal, and belongs to the technical field of valves.

7. The flow improved pneumatic solenoid valve according to claim 1, wherein The utility model discloses a valve body, a valve rod and a first seal, and belongs to the technical field of valves.

8. The flow improved pneumatic solenoid valve according to claim 1, wherein The utility model discloses a valve body, a valve rod and a first seal, and belongs to the technical field of valves. The utility model discloses a valve body, a valve rod and a first seal, and belongs to the technical field of valves.

9. A flow improved pneumatic solenoid valve according to claim 8, characterized in that The utility model discloses a valve body, a valve rod and a first seal, and belongs to the technical field of valves. The utility model discloses a valve body, a valve rod and a first seal, and belongs to the technical field of valves. The utility model discloses a valve body, a valve rod and a first seal, and belongs to the technical field of valves.

10. A flow improved pneumatic solenoid valve according to claim 9, characterized in that The utility model discloses a valve body, a valve rod and a first seal, and belongs to the technical field of valves. The utility model discloses a valve body, a valve rod and a first seal, and belongs to the technical field of valves. The utility model discloses a valve body, a valve rod and a first seal, and belongs to the technical field of valves. The utility model discloses a valve body, a valve rod and a first seal, and belongs to the technical field of valves. The utility model discloses a valve body, a valve rod and a first seal, and belongs to the technical field of valves. The utility model discloses a valve body, a valve rod and a first seal, and belongs to the technical field of valves. The utility model discloses a valve body, a valve rod and a first seal, and belongs to the technical field of valves. 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