CN103453148B - Solenoid pressure relief valve - Google Patents

Abstract

An electromagnetic pressure relief valve comprises an outer frame, a magnet, a plastic air nozzle, a coil module, a movable inner core and a spring. The outer frame is provided with a through hole. The collection magnet has a hollow channel. One end of the plastic air faucet penetrates through the through hole and is exposed outside, and the other end of the plastic air faucet penetrates through the channel and exposes out of the air inlet. The coil module is fixed in the outer frame and is provided with a hollow groove which is sleeved outside the magnet collecting body. The movable inner core is slidably disposed in the hollow groove, and a leakage-stopping gasket is disposed at one end of the movable inner core for sealing the air inlet. The spring is connected between the plastic air tap and the movable inner core, and the leakage-stopping gasket is far away from the air inlet by the elastic force of the spring. When the coil module is energized, the collection magnet and the movable inner core attract each other and resist the elastic force of the spring, so that the leakage-stopping gasket seals the air inlet.

Description

Solenoid pressure relief valve

【Technical field】

The present invention relates to a solenoid valve, and in particular to a solenoid pressure relief valve.

【Background technique】

Please refer to FIG. 1 , which shows a cross-sectional view of an electromagnetic pressure relief valve in the prior art. The air nozzle 120 of the electromagnetic pressure relief valve 100 can be connected to a pipeline that needs pressure relief. When the electromagnetic pressure relief valve 100 is in a normal state, the anti-leakage gasket 106 utilizes the elastic force of the spring 112 to prevent the air inlet 114a from being blocked or sealed, so that the pipeline that needs to be relieved maintains the action of pressure relief. When the pipeline does not need to release pressure, the coil 110 in the electromagnetic pressure relief valve 100 is energized and excited, so that the collector 114 attracts the movable inner core 108 and resists the elastic force of the spring 112, and pushes the anti-leakage gasket 106 to the air inlet hole 114a and block the air inlet 114a.

The air nozzle 120 of the existing electromagnetic pressure relief valve 100 is a metal piece integrally formed with the magnet collector 114 , in other words, the opening of the air inlet hole 114 a is located on the magnet collector 114 . In order to allow the opening of the air inlet hole 114a to be easily sealed by the anti-leak gasket 106, more precise processing is required near the opening of the air inlet hole 114a, so that the manufacturing cost of the integrated metal parts of the air nozzle 120 and the magnet collector 114 cannot be reduced. The overall cost of the associated electromagnetic pressure relief valve 100 also increases accordingly.

【Content of invention】

Therefore, an object of the present invention is to provide an improved electromagnetic pressure relief valve.

According to the above object of the present invention, an electromagnetic pressure relief valve includes an outer frame, a magnet, a plastic valve, a coil module, a movable inner core and a spring. The outer frame has a through hole. The magnet collector has a hollow channel. One end of the plastic air nozzle passes through the through hole and is exposed outside, and the other end passes through the channel and exposes the air inlet. The coil module is fixed in the outer frame and has a hollow slot sleeved on the outside of the magnet. The movable inner core is placed in the hollow groove in a slidable manner, and one end of the movable inner core has a leak-proof gasket for sealing the air inlet. The spring is connected between the plastic air nozzle and the movable inner core, and the anti-leak gasket is kept away from the air inlet by its elastic force. When the coil module is energized and excited, the magnet and the movable inner core attract each other and resist the elastic force of the spring, so that the anti-leak gasket seals the air inlet.

According to another embodiment of the present invention, the spring is a compression spring.

According to another embodiment of the present invention, the outer frame is a metal outer frame.

According to another embodiment of the present invention, the anti-leakage gasket is a soft material gasket.

According to another embodiment of the present invention, the anti-leakage gasket is embedded in the end of the movable inner core.

According to another embodiment of the present invention, the coil module includes a coil frame and a coil, and the coil is wound in a wire gathering slot of the coil frame.

According to another embodiment of the present invention, the electromagnetic pressure relief valve further includes a pair of electrode pins for respectively connecting to two wire ends of the coil.

According to another embodiment of the present invention, the electromagnetic pressure relief valve further includes a fixing metal sheet for fixing the coil module on the outer frame.

According to another embodiment of the present invention, the coil frame is a plastic frame.

According to another embodiment of the present invention, the plastic air nozzle has a positioning key for engaging with the positioning groove on the inner edge of the through hole of the outer frame.

According to another embodiment of the present invention, the plastic air nozzle has an outer ring portion, and the outer ring portion has a notch as a pressure relief channel.

According to another embodiment of the present invention, the coil bobbin has two restricting portions located at two opposite ends, and the wire collecting groove is formed between the two restricting portions.

According to another embodiment of the present invention, the magnet collector has an outer positioning ring clamped between one of the two limiting portions and a peripheral portion of the through hole of the outer frame.

According to another embodiment of the present invention, the magnet collector has a first outer positioning ring and a second outer positioning ring, and the peripheral portion of the through hole of the outer frame is clamped by the first outer positioning ring and the second outer positioning ring. between rings.

According to another embodiment of the present invention, the magnet collector has an annular stepped structure located on the inner wall of the channel.

According to another embodiment of the present invention, the other end of the plastic air nozzle has an annular hook, and when the other end of the plastic air nozzle passes through the channel of the magnet collector, the annular hook engages with the ring Shaped ladder structure, so that the plastic air nozzle is fixed on the magnet.

According to another embodiment of the present invention, the other end of the plastic valve has several elongated notches.

From the above, it can be known that the new design of the electromagnetic pressure relief valve of the present invention is more advantageous in terms of the cost of manufacturing the air nozzle with plastic materials, compared with the manufacturing cost of the integrally formed metal parts of the air nozzle and the magnet, so that the electromagnetic pressure relief valve The manufacturing cost and man-hours of the pressure valve can be further reduced. In addition, a notch is designed on the outer ring of the plastic air nozzle. When the plastic air nozzle is assembled in the through hole of the outer frame, the notch on the outer ring can also be used as a pressure relief channel. Therefore, both opposite ends of the electromagnetic pressure relief valve have pressure relief outlets to improve the pressure relief efficiency. Furthermore, there are many options for the combination mechanism of the plastic valve and the outer frame, which makes the selection of the electromagnetic pressure relief valve more flexible.

【Description of drawings】

In order to make the above and other objects, features, advantages and embodiments of the present invention more obvious and understandable, the accompanying drawings are described as follows:

FIG. 1 is a cross-sectional view of an electromagnetic pressure relief valve in the prior art.

FIG. 2 is a cross-sectional view illustrating an electromagnetic pressure relief valve according to the first embodiment of the present invention.

FIG. 3 is an exploded view illustrating the electromagnetic pressure relief valve of FIG. 2 .

FIG. 4 is an exploded view illustrating an electromagnetic pressure relief valve according to a second embodiment of the present invention.

FIG. 5 is a cross-sectional view illustrating the assembled electromagnetic pressure relief valve of FIG. 4 .

FIG. 6 is a cross-sectional view of an electromagnetic pressure relief valve according to a third embodiment of the present invention.

7 is a cross-sectional view of an electromagnetic pressure relief valve according to a fourth embodiment of the present invention.

【detailed description】

Please refer to FIGS. 2 and 3 at the same time. FIG. 2 is a cross-sectional view of an electromagnetic pressure relief valve according to an embodiment of the present invention. FIG. 3 is an exploded view of the electromagnetic pressure relief valve in FIG. 2 . The electromagnetic pressure relief valve 200 basically consists of an outer frame 204 , a magnet collector 214 , a plastic valve 215 , a coil module, a movable inner core 208 and a spring 212 . The plastic valve 215 is used to connect to a pipeline that needs to be released for pressure relief, and the pipeline that needs to be released can be any fluid pipeline. Under normal conditions, the electromagnetic pressure relief valve 200 utilizes the elastic force of the spring 212 to prevent the air inlet 215a from being blocked or sealed by the anti-leakage gasket 206, and flows through the hollow groove 202c to the pressure relief hole 202e to release the pressure, so that the pipe that needs pressure relief The road maintains the action of depressurization. When the pipeline does not need to release pressure, the coil 210 in the electromagnetic pressure relief valve 200 is excited due to energization, so that the magnet collector 214 and the movable inner core 208 attract each other and resist the elastic force of the spring 212, so that the anti-leakage gasket 206 is sealed in. Gas port 215a, and no longer release pressure. In this embodiment, both the magnet collector 214 and the movable inner core 208 are made of ferromagnetic materials, so when the coil 210 is energized and excited, the magnet collector 214 and the movable inner core 208 can attract each other and resist the elastic force of the spring 212 .

In this embodiment, the outer frame 204 may be a U-shaped metal outer frame. The outer frame 204 has a through hole 204a through which one end of the plastic air nozzle 215 can pass through.

The magnet collector 214 has a hollow channel 214a. When the plastic air nozzle 215 is assembled in the outer frame 204, the plastic air nozzle 215 passes through the through hole 204a of the outer frame 204 and is exposed outside, and its other end (ie, the assembly end 215b) passes through the channel 214a of the magnet collector 214 and is exposed. Its gas inlet 215a. When the outer frame 204, the plastic air nozzle 215 and the magnet collector 214 are assembled, the outer ring part 215c of the plastic air nozzle 215 is clamped between the magnet collector 214 and the through hole 204a of the outer frame 204, so that the plastic air nozzle 215 Can be positioned in a solenoid pressure relief valve. In this embodiment, the air inlet 215a is located on the plastic air nozzle 215, and the plastic air nozzle 215 can be manufactured through injection molding, so that the size and precision near the air inlet 215a can be properly controlled at a lower cost (compared to in the air inlet of the metal part in Figure 1).

In this embodiment, the coil module includes a coil bobbin 202 and a coil 210. The coil 210 is wound in the wire collecting slot 202a of the coil bobbin 202. If necessary, an insulating tape can be added outside the wound coil 210 to isolate the coil 210 from the coil. between the outer frames 204 to meet the requirements of safety regulations. The bobbin 202 has two restricting portions 202f located at two ends, and the wire collecting groove 202a is formed between the two restricting portions 202f. In addition, the coil bobbin 202 can be a plastic bobbin or a bobbin made of other insulating materials. The coil bobbin 202 is fixed in the outer frame 204 and has a hollow slot 202c sleeved on the outside of the magnet collector 214 . Furthermore, the coil bobbin 202 may have an annular stepped structure 202g on the inner wall of the hollow slot 202c. After the coil bobbin 202 is combined with the outer frame 204 , the annular stepped structure 202 g is used to fix the magnet collector 214 in the hollow slot 202 c of the coil bobbin 202 .

The movable inner core 208 is placed in the hollow groove 202c of the coil frame 202 in a slidable manner, and one end of the movable inner core 208 has a leak-proof gasket 206 for sealing the air inlet 215a of the plastic air nozzle 215, and is placed in the center of the other end. A material stealing hole 208b is made to reduce the weight, and the elastic force of the spring 212 is reduced to achieve the most energy saving and highest efficiency. In this embodiment, the anti-leak gasket 206 may be a rubber gasket or other soft material gaskets. In addition, the anti-leakage gasket 206 is embedded in the end of the movable inner core 208 , so the required volume of the anti-leakage gasket 206 is small, which has advantages in mold cost and simplicity of manufacturing process.

One end of the spring 212 is connected around the air inlet 215 a , and the other opposite end of the spring 212 is sleeved on the connecting end 208 a of the movable inner core 208 . The function of the spring 212 in the electromagnetic pressure relief valve 200 is to keep the anti-leak gasket 206 of the movable inner core 208 away from the air inlet 215a. In this embodiment, the spring 212 is a compression spring.

The solenoid pressure relief valve 200 also includes a pair of electrode pins 218 for connecting to two wire ends of the coil 210 respectively. The two electrode pins 218 are snapped into the two positioning grooves 202 b of the coil frame 202 respectively, so as to be fixed on the coil frame 202 . The electrode pins 218 are used to connect with an external power source, so as to supply current required for the coil 210 to be energized and excited. The existing coils are connected by electronic leads to an external power supply for power supply. In the embodiment of the present invention, the electrode pins 218 are fixed on the coil frame 202. In addition to eliminating the need for wire end processing procedures and time, it is easier to Introduce the operation method of mechanical automation.

The fixing metal sheet 216 is used to fix the coil module on the outer frame 204 and form a magnetic field loop at the same time. Specifically, the fixing metal sheet 216 is sleeved on the cylinder 202d of the coil bobbin 202 through its positioning hole 216b, and snapped into the positioning concave hole 204b of the outer frame 204 through the positioning protrusion 216a, thereby fixing the coil module on the outer frame 204 on.

Please refer to FIG. 4 , which shows an exploded view of an electromagnetic pressure relief valve according to a second embodiment of the present invention. The electromagnetic pressure relief valve 200' in FIG. 4 is different from the electromagnetic pressure relief valve 200 in FIGS. 2 and 3 mainly in the way the plastic valve 215 and the outer frame 204 are assembled. In this embodiment, the plastic air nozzle 215 has a pair of positioning keys 215e extending from the outer ring portion 215c along the axial direction of the plastic air nozzle 215 . Each positioning key 215e is used for engaging the corresponding positioning slot 204c on the inner edge of the through hole 204a of the outer frame 204 . Therefore, when a torsion force (ie rotational torque) is applied to the plastic air nozzle 215 to connect with an outer tube, the plastic air nozzle 215 will not rotate relative to the outer frame 204 . In addition, the outer ring portion 215c of the plastic air nozzle 215 has one or more notches 215d which can be used as passages for pressure relief. In this embodiment, each notch 215d is located between two positioning keys 215e extending from the outer ring portion 215c.

Please refer to FIG. 5 , which shows a cross-sectional view of the assembled electromagnetic pressure relief valve in FIG. 4 . Since the outer ring portion 215c of the plastic air nozzle 215 has a notch 215d, when the plastic air nozzle 215 is assembled in the through hole 204a of the outer frame 204, the notch 215d can be used as a pressure relief channel. In addition, the outer diameter of the assembly end 215b of the plastic air nozzle 215 should be smaller than the inner diameter of the hollow channel 214a of the magnet collector 214, so that a pressure relief gap is formed in the channel 214a. Therefore, when the electromagnetic pressure relief valve 200' is under normal conditions, the airflow input from the plastic air nozzle 215 can be output from the hollow groove 202c and the pressure relief hole 202e of the coil frame 202, and can also flow from the plastic through the hollow channel 214a of the magnet collector 214. The notch 215d of the air nozzle 215 is output (please refer to the arrow in the airflow direction in FIG. 5 ). In other words, both opposite ends of the electromagnetic pressure relief valve 200' have pressure relief outlets to improve the pressure relief efficiency.

Please refer to FIG. 6 , which shows a cross-sectional view of an electromagnetic pressure relief valve according to a third embodiment of the present invention. The electromagnetic pressure relief valve 300 in FIG. 6 is different from the electromagnetic pressure relief valve 200 in FIG. 2 mainly in the combined mechanism of the plastic valve and the outer frame. In this embodiment, the plastic air nozzle 215' is fixed to the hollow channel 214a of the magnet collector 214'. The magnet collector 214' has an annular stepped structure 214d located on the inner wall of the hollow channel 214a. In other words, the annular stepped structure 214d causes a gap in the inner diameter of the hollow channel 214a. The plastic air nozzle 215' has a ring hook 215f located at the assembly end 215b. When the assembly end 215b of the plastic air nozzle 215' passes through the hollow channel 214a of the magnet collector 214', the ring hook 215f engages with the annular stepped structure 214d so that the plastic nozzle 215' is fixed on the magnet collector 214'. When the assembly end 215b of the plastic air nozzle 215' passes through the hollow channel 214a of the magnet collector 214', the outer diameter of the plastic air nozzle 215' will be reduced at least in its ring-shaped hook 215f, so as to pass through the hollow passage of the magnet collector 214' Channel 214a. Several elongated notches 215g are designed on the assembly end 215b of the plastic valve 215', so that the ring hook 215f of the plastic valve 215' becomes an elastic structure, which can reduce its outer diameter when pressed by an external force, which is easier The hollow channel 214a passes through the magnet collector 214'. Furthermore, the magnet collection 214'

There is a first outer positioning ring 214b and a second outer positioning ring 214c. The first outer positioning ring 214b and the second outer positioning ring 214c are used to clamp the peripheral portion of the through hole 204a of the outer frame 204, so that the magnet collector 214' is fixed on the outer frame 204. When the magnet collector 214' passes through the through hole 204a of the outer frame 204, the second outer positioning ring 214c is formed by punching an edge of the magnet collector 214'.

Please refer to FIG. 7 , which shows a cross-sectional view of an electromagnetic pressure relief valve according to a fourth embodiment of the present invention. The electromagnetic pressure relief valve 300 of Fig. 7 is different from the electromagnetic pressure relief valve 300 of Fig. 6 mainly in the combined mechanism of the plastic valve and the outer frame. In this embodiment, the plastic valve 215 "is fixed on the magnet 214 " hollow Inside the channel 214a. The magnet collector 214" has a ring-shaped stepped structure 214d located on the inner wall of the hollow channel 214a. In other words, the ring-shaped stepped structure 214d causes a gap in the inner diameter of the hollow channel 214a. The plastic air nozzle 215" has an annular hook 215f located at the assembly end 215b. When the assembly end 215b of the plastic air nozzle 215" passes through the hollow passage 214a of the magnet 214", the annular hook 215f is engaged with the annular stepped structure 214d The plastic air nozzle 215 "is fixed on the magnet collector 214 ". When the assembly end 215b of the plastic air nozzle 215 "passes through the hollow channel 214a of the magnet collector 214", the plastic air nozzle 215 "is at least outside the ring hook 215f part The diameter will be reduced so that it can pass through the hollow passage 214a of the magnet 214 ". Several elongated notches 215g are designed on the assembly end 215b of the plastic valve 215", so that the ring hook 215f of the plastic valve 215" becomes an elastic structure, when it is pressed by an external force, its outer diameter can be reduced, and it is easier to pass through the hollow channel 214a of the magnet 214". Furthermore, the magnet collector 214" has an outer positioning ring 214b, which is clamped between one of the two limiting parts 202f and the peripheral portion 204g of the through hole 204a of the outer frame 204, so that the magnet collector 214" is fixed on the electromagnetic pressure relief valve. within 300".

From the above-mentioned embodiments of the present invention, it can be seen that the new design of the electromagnetic pressure relief valve of the present invention is more advantageous in terms of the cost of manufacturing the air nozzle with plastic materials, compared with the manufacturing cost of the integrally formed metal parts of the air nozzle and the magnet. , so that the manufacturing cost and manufacturing man-hours of the electromagnetic pressure relief valve can be further reduced. In addition, a notch is designed on the outer ring of the plastic air nozzle. When the plastic air nozzle is assembled in the through hole of the outer frame, the notch on the outer ring can also be used as a pressure relief channel. Therefore, both opposite ends of the electromagnetic pressure relief valve have pressure relief outlets to improve the pressure relief efficiency. Furthermore, there are many options for the combination mechanism of the plastic valve and the outer frame, which makes the selection of the electromagnetic pressure relief valve more flexible.

Although the present invention has been disclosed above in terms of implementation, it is not intended to limit the present invention. Anyone skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the present invention The scope of protection shall prevail as defined by the claims.

Claims (14)

1. An electromagnetic pressure relief valve, characterized in that: at least comprising: an outer frame with a through hole; a set of magnets having a hollow channel; A plastic air nozzle, one end of which passes through the through hole and is exposed to the outside to be connected to a pipeline requiring pressure relief for pressure relief, and the other end passes through the channel and exposes its air inlet, when the outer frame, the When the plastic valve and the magnet are assembled, the outer ring of the plastic valve is clamped between the magnet and the through hole of the outer frame, so that the plastic valve can be positioned; a coil module, fixed in the outer frame and having a hollow slot socketed outside the magnet; and A movable inner core is slidably placed in the hollow groove, and one end of the movable inner core has a leak-proof gasket for sealing the air inlet; A spring, connected between the plastic air nozzle and the movable inner core, uses its elastic force to keep the anti-leak gasket away from the air inlet, When the coil module is energized, the magnet collector and the movable inner core attract each other and resist the elastic force of the spring, so that the anti-leakage gasket seals the air inlet. 2. The electromagnetic pressure relief valve as claimed in claim 1, wherein the spring is a compression spring. 3. The electromagnetic pressure relief valve as claimed in claim 1, wherein the outer frame is a metal outer frame. 4. The electromagnetic pressure relief valve as claimed in claim 1, wherein the anti-leakage gasket is a gasket made of soft material. 5. The electromagnetic pressure relief valve as claimed in claim 1, wherein the anti-leakage gasket is embedded in the end of the movable inner core. 6 . The electromagnetic pressure relief valve as claimed in claim 1 , wherein the coil module comprises a coil frame and a coil, and the coil is wound in a wire slot of the coil frame. 7. The electromagnetic pressure relief valve as claimed in claim 6, further comprising a pair of electrode pins for respectively connecting to two wire ends of the coil. 8. The electromagnetic pressure relief valve according to claim 6, further comprising a fixing metal sheet for fixing the coil module on the outer frame. 9. The electromagnetic pressure relief valve as claimed in claim 6, wherein the coil frame is a plastic frame. 10 . The electromagnetic pressure relief valve as claimed in claim 1 , wherein the plastic valve has a positioning key for engaging with a positioning groove on the inner edge of the through hole of the outer frame. 11 . 11. The electromagnetic pressure relief valve as claimed in claim 1, wherein the outer ring portion has a notch as a passage for pressure relief. 12 . The electromagnetic pressure relief valve as claimed in claim 6 , wherein the coil bobbin has two restricting portions located at two opposite ends, and the wire collecting groove is formed between the two restricting portions. 13 . 13. The electromagnetic pressure relief valve as claimed in claim 1, wherein the magnet collector has an annular stepped structure located on the inner wall of the channel. 14. The electromagnetic pressure relief valve as claimed in claim 13, characterized in that: the other end of the plastic valve has several elongated notches.