Magnetic steel opening stop valve

Abstract

A magnetic steel opening stopping valve comprises a valve body and a valve rod arranged at the upper end of the valve body, a through hole is formed in the center of the valve rod, an annular sealing groove is formed in the lower surface of the valve body, a sealing ring matched with the sealing groove is arranged in the sealing groove, a placement structure is arranged on the valve rod, and annular magnetic steel is enclosed in the placement structure. The exhaust structure comprises an upper exhaust hole formed in the center of the upper surface of the valve body and a lower exhaust hole formed in the center of the lower surface of the valve body. The upper exhaust hole is communicated with the lower exhaust hole, and the diameter of the lower exhaust hole is smaller than that of the upper exhaust hole; a valve element is arranged in the center in the lower portion of the upper exhaust hole, and the lower end of the valve element penetrates through the lower exhaust hole downwards. An O-shaped ring is arranged in the middle of the valve element, and the outer edge of the O-shaped ring blocks and seals an opening in the upper end of the lower exhaust hole. According to the magnetic steel opening stopping valve, no matter whether the magnetic steel is arranged in the valve rod or arranged outside the valve rod, the magnetic steel can be effectively protected, the magnetic steel is effectively prevented from being collided and damaged, and the triggering effect of the magnetic steel is effectively guaranteed.

Description

Technical Field

[0001] The utility model relates to a check valve, in particular to a magnetic steel check valve. Background Art

[0002] The check valve is a safety device installed on the lid of an electric pressure cooker. It can effectively prevent the electric pressure cooker from being forced to open and causing danger. When the pressure inside the electric pressure cooker rises, the valve stem of the check valve will float up, locking the lid so that the lid cannot be opened.

[0003] From this, we can see that the traditional check valve only has a single check function, while the electric pressure cooker's air conditioning push rod has the effect of exhausting cold air. Even if the air conditioning push rod is equipped with a magnet, since the magnet is a solid structure, the air conditioning push rod only has the function of exhausting cold air and serving as the reed switch of the magnetic control electric pressure cooker's control device. Therefore, the check valve and the air conditioning push rod have a single function and neither has a pressure relief function. Summary of the Invention

[0004] The utility model aims to solve the existing technical problem and provide a magnetic steel check valve, which not only has the function of a magnetically controlled reed switch, but also has the function of pressure relief and exhaust.

[0005] The technical solution adopted by the utility model to solve the above technical problems is:

[0006] The utility model discloses a magnetic steel check valve, comprising a valve body, a valve stem arranged at the upper end of the valve body, a through hole being provided in the center of the valve stem, an annular sealing groove being provided on the lower surface of the valve body, a sealing ring matching the same being provided in the sealing groove, a placement structure being provided on the valve stem, the placement structure enclosing an annular magnetic steel therein; the exhaust structure comprises an upper exhaust hole arranged at the center of the upper surface of the valve body, and a lower exhaust hole arranged at the center of the lower surface of the valve body; the upper exhaust hole is communicated with the lower exhaust hole, and the diameter of the lower exhaust hole is smaller than the diameter of the upper exhaust hole; a valve core is provided at the center of the lower inner part of the upper exhaust hole, and the lower end of the valve core passes downwardly through the lower exhaust hole; an O-ring is provided in the middle of the valve core, and the outer edge of the O-ring blocks and seals the upper end opening of the lower exhaust hole; a spring is provided between the valve core and the valve stem.

[0007] The placement structure is an embedding groove provided on the upper end surface of the valve stem, and the embedding groove is annular; the magnetic steel is embedded in the embedding groove; an annular wrapping portion is extended inward from the edge of the groove opening at the upper end of the embedding groove.

[0008] The lower end of the valve stem is screwed into the upper end opening of the upper exhaust hole; the inner wall of the lower end opening of the through hole is provided with an annular limiting step; the upper end of the spring is pressed against the limiting step.

[0009] The wrapping portion is formed by stamping the upper end surface of the valve stem.

[0010] The outer edge of the upper surface of the magnetic steel has a circular rounded corner.

[0011] The placement structure is a receiving groove arranged at the center of the lower surface of the valve stem; the diameter of the receiving groove is larger than the diameter of the through hole; the upper end of the valve body is screwed into the groove on the lower side of the receiving groove; the magnetic steel is located between the upper end surface of the valve body and the upper groove wall of the receiving groove.

[0012] The diameter of the upper exhaust hole is smaller than the outer diameter of the magnetic steel; the upper end of the spring presses against the lower end surface of the magnetic steel.

[0013] An annular limiting portion is provided on the outer wall of the middle part of the valve core; the lower end surface of the spring presses against the upper surface of the limiting portion, and the upper end of the valve core penetrates upward into the lower end of the spring; the lower surface of the limiting portion and the outer wall of the valve core form an annular retaining groove, and the O-ring is located in the retaining groove; the outer edge of the O-ring protrudes outside the retaining groove.

[0014] The beneficial effects of the utility model are:

[0015] Compared with the prior art, the magnetic steel check valve adopting the structure of the utility model can not only relieve pressure and exhaust air through the floating action of the valve body and the valve stem, but also further relieve pressure and exhaust air through the gap between the inner wall of the lower exhaust hole and the outer wall of the lower end of the valve core, thereby ensuring the pressure relief effect to the greatest extent. At the same time, the placement structure can effectively fix the magnet so that the magnet can float up and down with the valve stem, realizing the effect of magnetically controlled reed switch. When the magnet floats up with the valve stem, it can effectively trigger the reed switch in the control device of the electric pressure cooker. When the magnet falls back and resets with the valve stem, the connection is disconnected, thereby realizing the opening and closing of the control device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a cross-sectional view of the first embodiment of the magnetic steel check valve of the present invention;

[0017] Figure 2 This is a three-dimensional diagram of the first embodiment of the magnetic steel check valve of the present invention;

[0018] Figure 3 This is a cross-sectional view of the first embodiment of the magnetic steel check valve of the present invention when it is installed on the valve seat of the electric pressure cooker lid;

[0019] Figure 4 This is a cross-sectional view of the first embodiment of the magnetic steel check valve of the present invention when it is installed on the valve seat of the electric pressure cooker lid and the valve stem is floating;

[0020] Figure 5 This is a cross-sectional view of a second embodiment of the magnetic steel check valve of the present invention;

[0021] Figure 6 This is a three-dimensional diagram of a second embodiment of a magnetic steel check valve of the present invention;

[0022] Figure 7This is a cross-sectional view of the second embodiment of the magnetic steel check valve of the present invention when it is installed on the valve seat of the electric pressure cooker lid;

[0023] Figure 8 This is a cross-sectional view of the second embodiment of the magnetic steel check valve of the utility model when it is installed on the valve seat of the electric pressure cooker lid and the valve stem is floating. DETAILED DESCRIPTION

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0025] For example 1, please refer to Figures 1 to 4 The utility model provides a magnetic steel check valve, comprising a valve body 1, a valve stem 2 arranged at the upper end of the valve body 1, a through hole 3 being provided in the center of the valve stem 2, an annular sealing groove 4 being provided on the lower surface of the valve body 1, a sealing ring 5 matching it being provided in the sealing groove 4, a placement structure being provided on the valve stem 2, the placement structure enclosing an annular magnetic steel 6 therein; the exhaust structure comprises an upper exhaust hole 7 arranged at the center of the upper surface of the valve body 1, and a lower exhaust hole 8 arranged at the center of the lower surface of the valve body 1; the upper exhaust hole 7 is connected to the lower exhaust hole 8, and the diameter of the lower exhaust hole 8 is smaller than the diameter of the upper exhaust hole 7; a valve core 9 is provided at the center of the lower part of the upper exhaust hole 7, and the lower end of the valve core 9 passes downward through the lower exhaust hole 8; an O-ring 10 is provided in the middle of the valve core 9, and the outer edge of the O-ring 10 blocks and seals the upper end of the lower exhaust hole 8; a spring 12 is provided between the valve core 9 and the valve stem 2.

[0026] The lid 13 of the electric pressure cooker has a valve seat 14 that matches the magnetic check valve. Automatic exhaust of the check valve can be achieved by simply installing the magnetic check valve in the valve seat 14. An upper movable hole 15 is provided in the center of the upper surface of the valve seat 14, and a lower movable hole 16 is provided in the center of the lower surface of the valve seat 14, which is connected to the upper movable hole 15. The diameter of the upper movable hole 15 is larger than the diameter of the lower movable hole 16, and the upper outer wall of the valve body 1 is provided with an annular protrusion 18 that fits with the bottom of the upper movable hole 15. At the same time, the lower end of the valve body 1 passes downward through the lower movable hole 16, and the sealing ring 5 is located directly below the valve seat 14, and the outer diameter of the sealing ring 5 is larger than the diameter of the lower movable hole 16.

[0027] When the pressure in the electric pressure cooker rises, the valve body 1 will be affected by the pressure and drive the valve stem 2 to move upward. At this time, the annular protrusion 18 moves upward synchronously, and the lower surface of the annular protrusion 18 no longer fits the bottom of the upper movable hole. The gas in the electric pressure cooker can be discharged to the outside through the gap between the inner wall of the lower movable hole 16 and the outer wall of the valve body 1, the gap between the bottom of the upper movable hole 15 and the lower surface of the annular protrusion 18, and the gap between the outer wall of the valve stem 2 and the inner wall of the upper movable hole 15 in sequence, thereby realizing the pressure relief action. When the pressure in the electric pressure cooker reaches a certain level, the valve body 1 will move up with the sealing ring 5 to a position that fits the lower surface of the valve seat 14. At this time, the sealing ring 5 blocks and seals the lower end opening of the lower movable hole 16. If the pressure is still too high, the valve core 9 will move upward under the influence of the pressure and compress the spring 12, and the spring 12 will generate elastic force. When the valve core 9 moves upward with the O-ring 10, the O-ring 10 no longer blocks and seals the upper end opening of the lower movable hole 16. The pressure in the electric pressure cooker can be discharged to the outside world through the gap between the inner wall of the lower exhaust hole 8 and the outer wall of the lower end of the valve core 9, the gap between the outer wall of the upper end of the valve core 9 and the inner wall of the upper exhaust hole 7, the inner hole of the magnetic steel 6, and the through hole 3 in turn, thereby assisting in pressure relief and exhaust, and further ensuring the safety of the check valve.

[0028] The placement structure is a ring-shaped embedding groove 19 provided on the upper end surface of the valve stem 2; the magnet 6 is embedded in the embedding groove 19; an annular wrapping portion 20 is extended inward from the edge of the upper end of the embedding groove 19.

[0029] As the embedding groove 19 cooperates with the wrapping portion 20 to wrap the magnet 6 inside, although the upper surface of the magnet 6 can still be observed from the outside through the notch on the upper side of the embedding groove 19, most of the magnet 6 is wrapped, and only the upper surface of the magnet 6 is exposed to the outside. In this case, the magnet 6 is extremely unlikely to be damaged by collisions. Therefore, even if the magnet 6 is placed outside the valve stem 2, it can still be protected to the greatest extent.

[0030] The lower end of the valve stem 2 is screwed into the upper end opening of the upper exhaust hole 7; the inner wall of the lower end opening of the through hole 3 is provided with an annular limiting step 21; the upper end of the spring 12 is pressed against the limiting step 21, and the existence of the limiting step 21 can effectively ensure the stability of the upper end of the spring 12, thereby ensuring the stability of the spring 12 when it is compressed and expanded.

[0031] The wrapping portion 20 is formed by stamping the upper end surface of the valve stem 2. Before the wrapping portion 20 is stamped, the magnet 6 can be easily installed in the embedding groove 19, which facilitates the installation of the magnet 6. After the wrapping portion 20 is stamped, the wrapping portion 20 can not only further wrap the magnet 6 to improve the damage prevention effect, but also effectively ensure the stability of the magnet 6 when embedded in the embedding groove 19.

[0032] The outer edge of the upper surface of the magnetic steel 6 has a circular fillet 22. The fillet 22 can assist when the wrapping portion 20 is stamped and formed, making the stamping deformation process of the wrapping portion 20 smoother.

[0033] For example 2, please refer to Figures 5 to 8 The placement structure is a receiving groove 23 provided at the center of the lower surface of the valve stem 2; the diameter of the receiving groove 23 is larger than the diameter of the through hole 3; the upper end of the valve body 1 is screwed into the lower notch of the receiving groove 23; the magnetic steel 6 is located between the upper end surface of the valve body 1 and the upper groove wall of the receiving groove 23.

[0034] As the magnet 6 is directly built into the receiving groove 23, the magnet 6 is completely wrapped in the valve stem 2, so that external factors cannot interfere with the magnet 6 at all, thereby avoiding the magnet 6 from being damaged by collision to the greatest extent.

[0035] The diameter of the upper exhaust hole 7 is smaller than the outer diameter of the magnet 6 ; this structure can actually ensure the stability of the magnet 6 when it is confined between the upper end surface of the valve body 1 and the upper side wall of the accommodating groove 23 .

[0036] The upper end of the spring 12 is pressed against the lower end surface of the magnetic steel 6, which can effectively ensure the stability of the upper end of the spring 12, thereby ensuring the stability of the spring 12 when it is compressed and expanded.

[0037] In summary, the present invention can effectively protect the magnet 6 regardless of whether the magnet 6 is built into the valve stem 2 or placed outside the valve stem 2, effectively preventing the magnet from being damaged by collision, and effectively ensuring the triggering effect of the magnet 6.

[0038] An annular limiting portion 24 is provided on the outer wall of the middle part of the valve core 9; the lower end face of the spring 12 is pressed against the upper surface of the limiting portion 24, and the upper end of the valve core 9 is upwardly inserted into the lower end of the spring 12; the lower surface of the limiting portion 24 and the outer wall of the valve core 9 are enclosed to form an annular retaining groove 25, and the O-ring 10 is located in the retaining groove 25; the outer edge of the O-ring 10 protrudes out of the retaining groove 25. This structural design can ensure the stability of the lower end of the spring 12. After the upper and lower ends of the spring 12 are effectively restricted, it can effectively avoid the side tilting of the spring 12 when it is compressed or expanded, and effectively ensure the stability of the valve core 9 when it moves upward to compress the spring 12 and the valve core 9 uses the elastic force of the spring 12 to reset.

Claims

1. A magnetic steel check valve, comprising a valve body, a valve stem disposed at the upper end of the valve body, a through hole provided at the center of the valve stem, an annular sealing groove provided on the lower surface of the valve body, a matching sealing ring provided in the sealing groove, and characterized in that: The valve stem is provided with a placement structure, which encloses a ring-shaped magnetic steel; the exhaust structure includes an upper exhaust hole provided at the center of the upper surface of the valve body and a lower exhaust hole provided at the center of the lower surface of the valve body; the upper exhaust hole and the lower exhaust hole are connected, and the diameter of the lower exhaust hole is smaller than the diameter of the upper exhaust hole; a valve core is provided at the center of the lower part of the upper exhaust hole, and the lower end of the valve core passes downward through the lower exhaust hole; an O-ring is provided in the middle of the valve core, and the outer edge of the O-ring blocks and seals the upper end of the lower exhaust hole; a spring is provided between the valve core and the valve stem.

2. The magnetic steel check valve according to claim 1, characterized in that: The placement structure is an embedding groove provided on the upper end surface of the valve stem, and the embedding groove is annular; the magnetic steel is embedded in the embedding groove; an annular wrapping portion is extended inward from the edge of the groove opening at the upper end of the embedding groove.

3. The magnetic steel check valve according to claim 2, characterized in that: The lower end of the valve stem is screwed into the upper end opening of the upper exhaust hole; the inner wall of the lower end opening of the through hole is provided with an annular limiting step; the upper end of the spring is pressed against the limiting step.

4. The magnetic steel check valve according to claim 2, characterized in that: The wrapping portion is formed by stamping the upper end surface of the valve stem.

5. The magnetic steel check valve according to claim 4, characterized in that: The outer edge of the upper surface of the magnetic steel has a circular rounded corner.

6. The magnetic steel check valve according to claim 1, characterized in that: The placement structure is a receiving groove arranged at the center of the lower surface of the valve stem; the diameter of the receiving groove is larger than the diameter of the through hole; the upper end of the valve body is screwed into the groove on the lower side of the receiving groove; the magnetic steel is located between the upper end surface of the valve body and the upper groove wall of the receiving groove.

7. The magnetic steel check valve according to claim 5, characterized in that: The diameter of the upper exhaust hole is smaller than the outer diameter of the magnetic steel; the upper end of the spring presses against the lower end surface of the magnetic steel.

8. The magnetic steel check valve according to claim 3 or 6, characterized in that: An annular limiting portion is provided on the outer wall of the middle portion of the valve core; the lower end surface of the spring presses against the upper surface of the limiting portion, and the upper end of the valve core is inserted upward into the lower end of the spring; the lower surface of the limiting portion and the outer wall of the valve core enclose an annular retaining groove, and the O-ring is located in the retaining groove; The outer edge of the O-ring protrudes out of the positioning groove.

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