A solenoid valve with longer service life

Abstract

The invention discloses a solenoid valve with a longer service life, comprising a valve body, a sealing assembly and an electromagnetic drive assembly, wherein an inlet flow channel and an outlet flow channel are arranged in the valve body, an annular sealing seat is arranged in the valve body, an end cover is arranged at the upper opening of the valve body, and the electromagnetic drive assembly is installed at the upper end of the end cover; the sealing assembly comprises a water retaining disc and a diaphragm, the diaphragm is installed on the water retaining disc, the diaphragm comprises a diaphragm body and an elastic part arranged at the outer edge of the diaphragm body, the elastic part comprises an elastic inner ring, an elastic outer ring and a connecting flange, the elastic inner ring is a trumpet structure with a large upper part and a small lower part, the water retaining disc is connected to the inner side of the elastic inner ring, the lower end of the elastic inner ring is connected to the outer edge of the diaphragm body, the upper end of the elastic inner ring is connected to the upper end of the elastic outer ring, and the connecting flange is arranged at the lower end of the elastic outer ring for connecting to the inner wall of the valve body. The invention can significantly reduce the shear force on the diaphragm when the valve is opened and closed, thereby improving the service life of the diaphragm, and further improving the service life of the electromagnetic valve.

Description

Technical Field

[0001] The invention relates to the technical field of valves, in particular to a solenoid valve with a longer service life. Background Art

[0002] Solenoid valves are industrial equipment controlled by electromagnetics. They are basic automation components used to control fluids. They are actuators and are not limited to hydraulic or pneumatic. They are used in industrial control systems to adjust the direction, flow, speed and other parameters of fluids. Solenoid valves can be used with different circuits to achieve the desired control, and the accuracy and flexibility of the control can be guaranteed. There are many types of solenoid valves, and different solenoid valves play a role in different positions in the control system. The most commonly used ones are check valves, safety valves, directional control valves, speed regulating valves, etc.

[0003] The sealing assembly in the existing solenoid valve usually includes a diaphragm and a water retaining plate. The diaphragm and the water retaining plate are assembled together. The diaphragm includes a diaphragm body located in the middle and an elastic connection part arranged on the outer periphery of the diaphragm body. The outer edge of the elastic connection part is fixed in the valve body. The cross section of the elastic connection part is in an inverted U shape. The outer periphery of the water retaining plate is vertically extended and provided with an annular flange. The inner side of the elastic connection part is tightly fitted with the outer side of the annular flange. Since the water retaining plate and the diaphragm will move vertically during the opening and closing process of the solenoid valve, the elastic connection part of the water retaining plate is subjected to the vertical force during the movement. The U-shaped bend of the elastic connection part is subjected to a large shear force, which is easy to be damaged and has a short service life.

[0004] Therefore, it is necessary to improve the above structure. Summary of the invention

[0005] The purpose of the present invention is to provide a solenoid valve with a longer service life. The present invention can significantly reduce the shear force applied to the diaphragm when the valve is opened and closed, thereby increasing the service life of the diaphragm and further increasing the service life of the solenoid valve.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a solenoid valve with a longer service life, comprising a valve body, a sealing assembly and an electromagnetic drive assembly, wherein an inlet flow channel and an outlet flow channel are arranged in the valve body, an annular sealing seat is arranged at a position corresponding to the inlet flow channel and the outlet flow channel in the valve body, an end cover is arranged at the opening of the upper end of the valve body, and the electromagnetic drive assembly is installed at the upper end of the end cover to control the sealing assembly to abut against or away from the upper end of the annular sealing seat to realize the conduction or blocking of the inlet flow channel and the outlet flow channel; the sealing assembly The component includes a water retaining plate and a diaphragm, the diaphragm is installed on the water retaining plate, the diaphragm includes a diaphragm body and an elastic part arranged on the outer edge of the diaphragm body, the elastic part includes an elastic inner ring, an elastic outer ring and a connecting flange in an integrated structure, the elastic inner ring is a trumpet-shaped structure with a larger upper part and a smaller lower part, the water retaining plate is connected to the inner side of the elastic inner ring, the lower end of the elastic inner ring is connected to the outer edge of the diaphragm body, the upper end of the elastic inner ring is connected to the upper end of the elastic outer ring, and the connecting flange is arranged at the lower end of the elastic outer ring for connecting to the inner wall of the valve body.

[0007] By adopting the above technical solution, the diaphragm adopts a special design structure so that the elastic inner ring of the elastic part has a certain inclination, and the elastic inner ring and the elastic outer ring form an annular structure with an inverted V-shaped cross-section. When the sealing component moves axially, the vertical deformation of the elastic inner ring reduces the influence of the axial force on itself, thereby significantly reducing the shear force on the diaphragm when the valve is opened and closed, so as to increase the service life of the diaphragm and further increase the service life of the solenoid valve.

[0008] The present invention is further configured as follows: the electromagnetic drive component includes a coil frame, an electromagnetic coil, an inner sleeve and a valve core, the coil frame is installed on the end cover, the coil frame is provided with a plastic sealing body arranged in an annular shape, the electromagnetic coil is arranged in the plastic sealing body, the inner sleeve axially penetrates the center of the coil frame, the valve core can be axially movably arranged in the inner sleeve for cooperating with the sealing component, the inner sleeve is also provided with a reset spring for applying an axial force to the valve core, the inner end of the inner sleeve is provided with a clamping portion, and the inner wall of the valve body is provided with a connecting groove. When the end cover is installed on the valve body, the inner end of the end cover is pressed against the upper end of the clamping portion of the inner sleeve, so that the inner sleeve presses the connecting flange on the diaphragm in the connecting groove.

[0009] By adopting the above technical solution, when the electromagnetic coil is energized, the valve core can be driven upward, so that the sealing assembly leaves the annular sealing seat under the action of water pressure, thereby opening the solenoid valve; when the electromagnetic coil is de-energized, the return spring applies spring force to the valve core, causing the valve core to move downward, so that the sealing ring assembly is pressed against the annular sealing seat, thereby closing the solenoid valve.

[0010] The present invention is further configured such that an annular clamping portion is provided on the inner side of the elastic inner ring, the cross-section of the annular clamping portion is conical, rectangular or circular, and the outer periphery of the water retaining plate is provided with an annular clamping groove matching the annular clamping portion; a middle hole is provided in the middle of the diaphragm body, a connecting rod is provided on the water retaining plate, the connecting rod passes through the middle hole, and a limiting portion is provided on the outer periphery of the connecting rod which is tightly pressed against the bottom end of the diaphragm body.

[0011] By adopting the above technical solution, the connection between the water retaining plate and the diaphragm can be realized, and the connection structure is simple and reliable, and the disassembly and assembly is very convenient.

[0012] The present invention is further configured such that a sealing groove for installing a sealing ring is provided on the outer periphery of the limiting portion. When the electromagnetic drive assembly presses the sealing assembly onto the annular sealing seat, the outer periphery of the limiting portion fits against the inner wall of the annular sealing seat. The upper end of the diaphragm body is also provided with a plurality of sealing ribs which are concentrically arranged and pressed against the lower end of the water retaining plate.

[0013] By adopting the above technical solution, reliable sealing between the sealing component and the annular sealing seat can be ensured when the solenoid valve is closed, thereby preventing the medium from leaking from the gap between the two.

[0014] The present invention is further configured as follows: a first annular recess is provided at the outer edge of the upper end of the diaphragm body, a second annular recess is provided at the outer edge of the lower end of the water retaining plate, the first annular recess and the second annular recess are combined to form a first chamber, a second chamber is provided above the corresponding sealing component in the valve body, the diaphragm body is provided with a plurality of first through holes in a circular array for connecting the inlet flow channel with the first chamber, the water retaining plate is provided with a second through hole for connecting the first chamber with the second chamber, and the water retaining plate is provided with a third through hole for connecting the second chamber with the outlet flow channel at a position directly below the valve core.

[0015] By adopting the above technical solution, the opening and closing of the valve is achieved by changing the fluid pressure difference, which has the advantages of faster response speed, stronger adaptability and lower energy consumption.

[0016] The present invention is further configured such that a filter screen is arranged in the inlet flow channel, and the filter screen includes an annular base, a hemispherical guide portion arranged in the middle of the annular base, and an annular support portion arranged on the outer periphery of the annular base; a support step is provided in the inlet flow channel, the annular base abuts against the support step, the hemispherical guide portion protrudes in a direction away from the outlet flow channel, the annular support portion extends in a direction away from the outlet flow channel, and the outer circular surface of the annular support portion is tightly fitted with the inner circular surface of the inlet flow channel; an annular material storage trough is formed between the annular base, the hemispherical guide portion and the annular support portion.

[0017] By adopting the above technical solution, the medium in the flow channel can be filtered, and large particle impurities are stored in the annular storage trough on the periphery after filtering, which can ensure that the surface of the middle hemispherical guide part is not blocked, thereby ensuring smooth passage of the medium.

[0018] The present invention is further configured to include an emergency mechanism, the emergency mechanism includes an emergency drive disc, a follower sleeve and a plurality of check valves, the emergency drive disc is rotatably arranged on the inner side of the annular sealing seat, the emergency drive disc is provided with a plurality of first through holes distributed in a circumferential array, an emergency operating rod is provided in the middle of the emergency drive disc, an axial hole is provided at the bottom of the valve body, the emergency operating rod passes through the axial hole and extends to the outside of the valve body, and a first sealing ring for sealing with the inner wall of the axial hole is provided on the outer periphery of the emergency operating rod, a positioning step is provided on the outer periphery of the annular sealing seat, the follower sleeve is rotatably arranged on the outer periphery of the annular sealing seat, and a latch for limiting the follower sleeve on the positioning step is also inserted on the outer periphery of the annular sealing seat;

[0019] The emergency drive disc is provided with a first annular groove on its outer circumference, a plurality of first mounting grooves are provided on its inner circumferential surface, a first magnet is embedded in each first mounting groove, a first rubber ring is sleeved on the first annular groove, the first rubber ring restricts the first magnet in the corresponding first mounting groove, a second annular groove is provided on its inner circumferential surface, a plurality of second mounting grooves corresponding to the first mounting groove are provided on the inner circumferential surface of the second annular groove, a second magnet is embedded in each second mounting groove, a second rubber ring is sleeved on the second annular groove, the second rubber ring restricts the second magnet in the corresponding second mounting groove, and the first magnet and the corresponding second magnet are arranged so that their magnetic poles attract each other;

[0020] The side of the annular sealing seat is provided with a plurality of inner holes in a circumferential array, the follower sleeve is provided with a plurality of outer holes corresponding to the inner holes, and a second sealing ring for sealing with the inner wall of the follower sleeve is respectively provided at the upper and lower positions of the outer side of the annular sealing seat corresponding to the inner holes. When the emergency drive disk drives the follower sleeve to rotate by magnetic attraction, there is a first position in which the outer hole on the follower sleeve is connected to the inner hole on the annular sealing seat, and a second position in which the outer hole on the follower sleeve is completely blocked from the inner hole on the annular sealing seat, and the check valve is installed on the corresponding outer hole.

[0021] By adopting the above technical solution, when the electromagnetic drive mechanism works normally, the emergency mechanism does not work, that is, the emergency drive disc is located in the second position, and the outer hole on the follower sleeve and the inner hole on the annular sealing seat are completely blocked; during the production process, when the solenoid valve is closed and the electromagnetic drive mechanism fails, if the production needs to continue for a short time, the emergency mechanism is turned on to rotate the emergency drive disc to the first position, and the emergency drive disc drives the follower sleeve to rotate through the magnetic attraction, so that the outer hole on the follower sleeve and the inner hole on the annular sealing seat are connected. When the medium pressure in the inlet flow channel is greater than the set opening pressure of the check valve on the outer hole of the follower sleeve, the check valve opens, the inlet flow channel and the outlet flow channel are connected, and the production line can operate in an emergency.

[0022] The present invention is further configured as follows: the check valve includes a sleeve, a support plate, a valve disc and a pre-tightening spring, the sleeve being threadedly connected to the outer end of the corresponding outer hole, and the outer end of the sleeve being threadedly connected to a locking nut, the locking nut being tightly abutted against the outer wall of the annular sealing seat, the support plate being threadedly connected to the sleeve, a plurality of second through holes being distributed in a circular array on the support plate, a guide hole with a square cross section is provided at the center of the support plate, the valve disc is arranged in the sleeve, a guide rod extending axially and having a square cross section is provided on the valve disc, the guide rod passes through the guide hole, a sealing flange extending toward the inner circumference is provided at the inlet of the outer end of the sleeve, the pre-tightening spring is sleeved on the outer circumference of the guide rod, and one end of the pre-tightening spring is abutted against the support plate, and the other end of the pre-tightening spring is abutted against the valve disc, so that the valve disc is pressed against the sealing flange, and a first hexagonal groove is also provided at the outer end of the valve disc.

[0023] By adopting the above technical solution, the check valve has a simple and reliable structure and is very convenient to assemble. Moreover, the check valve can be set to an adjustable opening pressure, that is, by inserting a hexagonal wrench into the first hexagonal groove of the valve disc and rotating the valve disc, the support disc can be driven to rotate, causing the support disc to move axially, thereby changing the compression amount of the preload spring, and then changing the preload force applied by the preload spring to the valve disc, thereby realizing the adjustment of the opening pressure set by the check valve.

[0024] The present invention is further configured as follows: a positioning groove is provided on the inner wall of the valve body, the bottom of the annular sealing seat is embedded in the positioning groove, and a sealing gasket is sandwiched between the bottom end of the annular sealing seat and the inner end surface of the positioning groove, a locking hole connected to the inlet flow channel is provided on one side of the positioning groove, and an L-shaped locking groove connected to the upper end of the positioning groove is provided on the other side of the positioning groove, a locking assembly and a fixed locking block are provided on the outer side of the annular sealing seat, the locking assembly includes a movable locking block, a locking spring and a pressure cover, and a first side hole is provided on the outer side of the annular sealing seat. The pressure cover is installed at the outer end of the first side hole, the movable locking block passes through the pressure cover, and the inner end of the movable locking block is provided with a limiting convex edge that forms a stroke limit with the pressure cover, and the locking spring is arranged in the first side hole to apply an outward spring force to the movable locking block; the outer side of the annular sealing seat is also provided with a second side hole, and one end of the fixed locking block is threadedly connected to the second side hole; when the bottom of the annular sealing seat is installed in the positioning groove and the fixed locking block slides to the innermost end of the L-shaped locking groove, the movable locking block moves outward under the push of the locking spring and extends into the locking hole.

[0025] By adopting the above technical solution, the detachable design of the annular sealing seat greatly facilitates the disassembly and assembly operation of the emergency mechanism, that is, the annular sealing seat can be taken out as a whole during assembly, and then the follower sleeve and the check valve can be installed on the annular sealing seat, and the disassembly operation is similar.

[0026] The present invention is further configured as follows: a fan-shaped groove is provided at a position of the inner wall of the valve body corresponding to the inner end of the shaft hole, and a stroke convex portion is provided at the outer periphery of the emergency operating lever. When the emergency operating lever rotates, the stroke convex portion rotates in the fan-shaped groove, and when the stroke convex portion abuts against one end of the fan-shaped groove, the emergency drive disk is located at a first position, and when the stroke convex portion abuts against the other end of the fan-shaped groove, the emergency drive disk is located at a second position; a yield groove is provided at a position of the outer side of the valve body corresponding to the outer end of the shaft hole, the outer end of the emergency operating lever is threadedly connected to a limiting nut, a gasket is sandwiched between the limiting nut and the inner end of the yield groove, the outer end of the emergency operating lever, the limiting nut and the gasket are all arranged in the yield groove, and a second hexagonal groove is provided at the outer end of the emergency operating lever.

[0027] By adopting the above technical solution, the emergency operating lever can be axially limited and at the same time have the function of angular limitation, so that the user can accurately adjust the emergency drive disc to the first position or the second position. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a cross-sectional view of the entire embodiment 1;

[0029] Figure 2 is a cross-sectional view of the sealing assembly in Example 1;

[0030] Figure 3 is a cross-sectional view of the entire embodiment 2;

[0031] Figure 4 It is a structural schematic diagram of the emergency mechanism in Example 2;

[0032] Figure 5 This is a schematic diagram of the installation structure of the check valve in Example 2;

[0033] Figure 6 Schematic diagram of the internal structure of the valve body in Example 2.

[0034] In the figure: 1. valve body; 2. sealing assembly; 3. electromagnetic drive assembly; 4. inlet flow channel; 5. outlet flow channel; 6. annular sealing seat; 7. end cover; 8. water retaining plate; 9. diaphragm; 10. diaphragm body; 11. elastic part; 12. elastic inner ring; 13. elastic outer ring; 14. connecting flange; 15. coil skeleton; 16. electromagnetic coil; 17. inner sleeve; 18. valve core; 19. plastic sealing body; 20. reset spring; 21. pressing part; 22. connecting groove; 23. annular clamping part; 24. annular clamping groove ; 25, middle hole; 26, connecting rod; 27, limiter; 28, sealing groove; 29, sealing rib; 30, first annular inner concave; 31, second annular inner concave; 32, first chamber; 33, second chamber; 34, first through hole; 35, second through hole; 36, third through hole; 37, filter; 38, annular base; 39, hemispherical guide; 40, annular support; 41, support step; 42, annular storage tank; 43, emergency mechanism; 44, emergency drive disc; 45, follower sleeve; 46 , check valve; 47, first through hole; 48, emergency operating lever; 49, shaft hole; 50, first sealing ring; 51, positioning step; 52, latch; 53, first annular groove; 54, first mounting groove; 55, first magnet; 56, first rubber ring; 57, second annular groove; 58, second mounting groove; 59, second magnet; 60, second rubber ring; 61, inner hole; 62, outer hole; 63, second sealing ring; 64, sleeve; 65, support plate; 66, valve disc; 67, preload spring; 68, locking Nut; 69, second through hole; 70, guide hole; 71, guide rod; 72, sealing flange; 73, first hexagonal groove; 74, positioning groove; 75, sealing gasket; 76, locking hole; 77, L-shaped locking groove; 78, locking assembly; 79, fixed locking block; 80, movable locking block; 81, locking spring; 82, pressure cover; 83, first side hole; 84, limiting convex edge; 85, second side hole; 86, fan-shaped groove; 87, travel convex part; 88, clearance groove; 89, limiting nut; 90, gasket; 91, second hexagonal groove. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Embodiment 1: The present invention provides as attached Figure 1 and attached Figure 2 A solenoid valve with a longer service life is shown, comprising a valve body 1, a sealing assembly 2 and an electromagnetic drive assembly 3, wherein the valve body 1 is provided with an inlet flow channel 4 and an outlet flow channel 5, wherein the valve body 1 is provided with an annular sealing seat 6 at a position corresponding to the inlet flow channel 4 and the outlet flow channel 5, wherein an end cover 7 is provided at the upper opening of the valve body 1, wherein the electromagnetic drive assembly 3 is installed at the upper end of the end cover 7 to control the sealing assembly 2 to abut against or be away from the upper end of the annular sealing seat 6, so as to realize the conduction or blocking of the inlet flow channel 4 and the outlet flow channel 5; wherein the sealing assembly 2 comprises a water retaining plate 8 and a diaphragm 9, wherein the diaphragm 9 Installed on the water retaining plate 8, the diaphragm 9 includes a diaphragm body 10 and an elastic part 11 arranged on the outer edge of the diaphragm body 10, the elastic part 11 includes an elastic inner ring 12, an elastic outer ring 13 and a connecting flange 14 in an integrated structure, the elastic inner ring 12 is a trumpet-shaped structure with a larger upper part and a smaller lower part, the water retaining plate 8 is connected to the inner side of the elastic inner ring 12, the lower end of the elastic inner ring 12 is connected to the outer edge of the diaphragm body 10, the upper end of the elastic inner ring 12 is connected to the upper end of the elastic outer ring 13, and the connecting flange 14 is arranged at the lower end of the elastic outer ring 13 for connecting to the inner wall of the valve body 1. The diaphragm 9 adopts a special design structure so that the elastic inner ring 12 of the elastic part 11 has a certain slope. The elastic inner ring 12 and the elastic outer ring 13 form an annular structure with an inverted V-shaped cross-section. When the sealing component 2 moves axially, the vertical deformation of the elastic inner ring 12 reduces the influence of the axial force on itself, thereby significantly reducing the shear force on the diaphragm 9 when the valve is opened and closed, thereby increasing the service life of the diaphragm 9 and further increasing the service life of the solenoid valve.

[0037] As attached Figure 1As shown, the electromagnetic drive assembly 3 includes a coil skeleton 15, an electromagnetic coil 16, an inner sleeve 17 and a valve core 18. The coil skeleton 15 is installed on the end cover 7. A plastic sealing body 19 arranged in an annular shape is provided on the coil skeleton 15. The electromagnetic coil 16 is arranged in the plastic sealing body 19. The inner sleeve 17 axially penetrates the center of the coil skeleton 15. The valve core 18 can be axially movably arranged in the inner sleeve 17 for cooperating with the sealing assembly 2. A reset spring 20 for applying an axial force to the valve core 18 is also provided in the inner sleeve 17. A clamping portion 21 is provided at the inner end of the inner sleeve 17. A connecting groove 22 is provided on the inner wall of the valve body 1. When the end cover 7 is installed on the valve body 1, the inner end of the end cover 7 is pressed against the upper end of the clamping portion 21 of the inner sleeve 17, so that the inner sleeve 17 presses the connecting flange 14 on the diaphragm 9 in the connecting groove 22. When the electromagnetic coil 16 is energized, it can drive the valve core 18 upward, so that the sealing assembly 2 leaves the annular sealing seat 6 under the action of water pressure, thereby opening the electromagnetic valve. When the electromagnetic coil 16 is de-energized, the return spring 20 applies a spring force to the valve core 18, causing the valve core 18 to move downward, so that the sealing ring assembly is pressed against the annular sealing seat 6, thereby closing the electromagnetic valve.

[0038] As attached Figure 2 As shown, an annular clamping portion 23 is provided on the inner side of the elastic inner ring 12, and the cross section of the annular clamping portion 23 is conical, rectangular or circular. The outer periphery of the water retaining plate 8 is provided with an annular clamping groove 24 that matches the annular clamping portion 23. In this embodiment, the annular clamping portion 23 is conical, and the slope of the upper end of the annular clamping portion 23 is smaller than the slope of the lower end. A middle hole 25 is provided in the middle of the diaphragm body 10, and a connecting rod 26 is provided on the water retaining plate 8. The connecting rod 26 passes through the middle hole 25, and a limiting portion 27 is provided on the outer periphery of the connecting rod 26 to press against the bottom end of the diaphragm body 10. This design can realize the connection between the water retaining plate 8 and the diaphragm 9, and the connection structure is simple and reliable, and it is very convenient to disassemble and assemble.

[0039] As attached Figure 2 As shown, the outer periphery of the limiting portion 27 is provided with a sealing groove 28 for installing a sealing ring. When the electromagnetic drive component 3 presses the sealing component 2 onto the annular sealing seat 6, the outer periphery of the limiting portion 27 fits with the inner wall of the annular sealing seat 6. The upper end of the diaphragm body 10 is also provided with a plurality of sealing convex ribs 29 which are concentrically arranged and abut against the lower end of the water retaining plate 8. This design can ensure reliable sealing between the sealing component 2 and the annular sealing seat 6 when the electromagnetic valve is closed, and prevent the medium from leaking from the gap between the two.

[0040] As attached Figure 1 and attached Figure 2As shown, a first annular inner concave portion 30 is provided at the outer edge of the upper end of the diaphragm body 10, a second annular inner concave portion 31 is provided at the outer edge of the lower end of the water retaining plate 8, the first annular inner concave portion 30 and the second annular inner concave portion 31 are combined to form a first chamber 32, a second chamber 33 is provided above the corresponding sealing component 2 in the valve body 1, a plurality of first through holes 34 for connecting the inlet flow channel 4 with the first chamber 32 are arranged in a circumferential array on the diaphragm body 10, a second through hole 35 for connecting the first chamber 32 with the second chamber 33 is provided on the water retaining plate 8, and a third through hole 36 for connecting the second chamber 33 with the outlet flow channel 5 is provided at the position of the water retaining plate 8 directly below the valve core 18. The valve is opened and closed by changing the fluid pressure difference, which has the advantages of faster response speed, stronger adaptability and lower energy consumption.

[0041] As attached Figure 1 As shown, a filter screen 37 is arranged in the inlet flow channel 4, and the surface of the filter screen 37 is covered with filter holes. The filter screen 37 includes an annular base 38, a hemispherical guide portion 39 arranged in the middle of the annular base 38, and an annular support portion 40 arranged on the outer periphery of the annular base 38. A support step 41 is arranged in the inlet flow channel 4, and the annular base 38 abuts on the support step 41. The hemispherical guide portion 39 protrudes in the direction away from the outlet flow channel 5, and the annular support portion 40 extends in the direction away from the outlet flow channel 5. The outer circular surface of the annular support portion 40 is closely fitted with the inner circular surface of the inlet flow channel 4, and an annular storage tank 42 is formed between the annular base 38, the hemispherical guide portion 39 and the annular support portion 40. This design can filter the medium in the flow channel, and the large particle impurities are stored in the annular storage tank 42 on the outer periphery after filtering, which can ensure that the surface of the hemispherical guide portion 39 in the middle is not blocked, thereby ensuring smooth passage of the medium.

[0042] Embodiment 2: As attached Figures 3 to 6As shown, on the basis of Example 1, this embodiment is additionally provided with an emergency mechanism 43, the emergency mechanism 43 comprising an emergency drive disc 44, a follower sleeve 45 and a plurality of check valves 46, the emergency drive disc 44 is rotatably arranged on the inner side of the annular sealing seat 6, the emergency drive disc 44 is provided with a plurality of first through holes 47 distributed in a circumferential array, the middle part of the emergency drive disc 44 is provided with an emergency operating rod 48, the bottom of the valve body 1 is provided with an axial hole 49, the emergency operating rod 48 passes through the axial hole 49 and extends to the outside of the valve body 1, and the outer periphery of the emergency operating rod 48 is provided with a plurality of first through holes 47 distributed in a circumferential array, and ... The first sealing ring 50 for sealing cooperation is formed, the outer periphery of the annular sealing seat 6 is provided with a positioning step 51, the follower sleeve 45 is rotatably arranged on the outer periphery of the annular sealing seat 6, and the outer periphery of the annular sealing seat 6 is also plugged with a latch 52 for limiting the follower sleeve 45 on the positioning step 51; the outer periphery of the emergency driving disk 44 is provided with a first annular groove 53, the inner circumference of the first annular groove 53 is provided with a plurality of first mounting grooves 54, each of the first mounting grooves 54 is embedded with a first magnet 55, the first annular groove 53 is sleeved with a first rubber ring 56, the first rubber ring 56 holds the first magnet The body 55 is limited in the corresponding first mounting groove 54, the inner circumference of the follower sleeve 45 is provided with a second annular groove 57, the inner circumference of the second annular groove 57 is provided with a plurality of second mounting grooves 58 corresponding to the first mounting groove 54, each second mounting groove 58 is embedded with a second magnet 59, the second annular groove 57 is sleeved with a second rubber ring 60, the second rubber ring 60 limits the second magnet 59 in the corresponding second mounting groove 58, the first magnet 55 and the corresponding second magnet 59 are arranged to attract each other with magnetic poles; the side of the annular sealing seat 6 is provided with a plurality of inner holes 6 distributed in a circumferential array. 1, the follower sleeve 45 is provided with a plurality of outer holes 62 corresponding to the inner hole 61, and a second sealing ring 63 for sealing with the inner wall of the follower sleeve 45 is respectively provided at the upper and lower positions of the outer side of the annular sealing seat 6 corresponding to the inner hole 61. When the emergency driving disk 44 drives the follower sleeve 45 to rotate by magnetic attraction, it has a first position in which the outer hole 62 on the follower sleeve 45 is connected to the inner hole 61 on the annular sealing seat 6, and a second position in which the outer hole 62 on the follower sleeve 45 is completely blocked from the inner hole 61 on the annular sealing seat 6, and the check valve 46 is installed on the corresponding outer hole 62.When the electromagnetic drive mechanism works normally, the emergency mechanism 43 does not work, that is, the emergency drive disk 44 is located in the second position, and the outer hole 62 on the follower sleeve 45 is completely blocked from the inner hole 61 on the annular sealing seat 6; during the production process, when the solenoid valve is closed and the electromagnetic drive mechanism fails, if the production needs to continue for a short time, the emergency mechanism 43 is opened to rotate the emergency drive disk 44 to the first position, and the emergency drive disk 44 drives the follower sleeve 45 to rotate through the magnetic attraction, so that the outer hole 62 on the follower sleeve 45 is connected to the inner hole 61 on the annular sealing seat 6. When the medium pressure in the inlet flow channel 4 is greater than the set opening pressure of the check valve 46 on the outer hole 62 on the follower sleeve 45, the check valve 46 opens, the inlet flow channel 4 and the outlet flow channel 5 are connected, and the production line can be operated in an emergency.

[0043] As attached Figure 5 As shown, the check valve 46 includes a sleeve 64, a support plate 65, a valve disc 66 and a preload spring 67. The sleeve 64 is threadedly connected to the outer end of the corresponding outer hole 62, and the outer end of the sleeve 64 is threadedly connected to a locking nut 68, and the locking nut 68 is tightly abutted against the outer wall of the annular sealing seat 6. The support plate 65 is threadedly connected to the sleeve 64. A plurality of second through holes 69 are distributed in a circumferential array on the support plate 65. A guide hole 70 with a square cross section is provided at the center of the support plate 65. The valve disc 66 Arranged in the sleeve 64, the valve flap 66 is provided with a guide rod 71 extending axially and having a square cross-section, the guide rod 71 passes through the guide hole 70, and a sealing flange 72 extending toward the inner circumference is provided at the inlet of the outer end of the sleeve 64. The pre-tightening spring 67 is sleeved on the outer circumference of the guide rod 71, and one end of the pre-tightening spring 67 is abutted against the support plate 65, and the other end of the pre-tightening spring 67 is abutted against the valve flap 66, so that the valve flap 66 is pressed against the sealing flange 72, and the outer end of the valve flap 66 is also provided with a first hexagonal groove 73. The check valve 46 has a simple and reliable structure and is very convenient to assemble. Moreover, the opening pressure of the check valve 46 can be adjusted, that is, by inserting a hexagonal wrench into the first hexagonal groove 73 of the valve disc 66 and rotating the valve disc 66, the support disc 65 can be driven to rotate, causing the support disc 65 to axially move, thereby changing the compression amount of the preload spring 67, and then changing the preload force applied by the preload spring 67 to the valve disc 66, thereby realizing the adjustment of the opening pressure of the check valve 46.

[0044] As attached Figure 4 and attached Figure 6As shown, a positioning groove 74 is provided on the inner wall of the valve body 1, the bottom of the annular sealing seat 6 is embedded in the positioning groove 74, and a sealing gasket 75 is sandwiched between the bottom end of the annular sealing seat 6 and the inner end surface of the positioning groove 74, a locking hole 76 connected to the inlet flow channel 4 is provided on one side of the positioning groove 74, and an L-shaped locking groove 77 connected to the upper end of the positioning groove 74 is provided on the other side of the positioning groove 74, a locking assembly 78 and a fixed locking block 79 are provided on the outer side of the annular sealing seat 6, the locking assembly 78 includes a movable locking block 80, a locking spring 81 and a pressure cover 82, a first side hole 83 is provided on the outer side of the annular sealing seat 6, and the pressure cover 82 Installed at the outer end of the first side hole 83, the movable lock block 80 passes through the gland 82, and the inner end of the movable lock block 80 is provided with a limiting convex edge 84 that forms a travel limit with the gland 82, and the locking spring 81 is arranged in the first side hole 83 to apply an outward spring force to the movable lock block 80; the outer side of the annular sealing seat 6 is also provided with a second side hole 85, and one end of the fixed lock block 79 is threadedly connected to the second side hole 85; when the bottom of the annular sealing seat 6 is installed in the positioning groove 74 and the fixed lock block 79 slides to the innermost end of the L-shaped lock groove 77, the movable lock block 80 moves outward under the push of the locking spring 81 and extends into the locking hole 76. The detachable design of the annular sealing seat 6 greatly facilitates the disassembly and assembly operation of the emergency mechanism 43, that is, the annular sealing seat 6 can be taken out as a whole during assembly, and then the follower sleeve 45 and the check valve 46 are installed on the annular sealing seat 6, and the disassembly operation is similar.

[0045] As attached Figure 4 and attached Figure 6 As shown, a fan-shaped groove 86 is provided on the inner wall of the valve body 1 at a position corresponding to the inner end of the shaft hole 49, and a stroke convex portion 87 is provided on the outer periphery of the emergency operating lever 48. When the emergency operating lever 48 rotates, the stroke convex portion 87 rotates in the fan-shaped groove 86, and when the stroke convex portion 87 abuts against one end of the fan-shaped groove 86, the emergency drive disk 44 is located in the first position, and when the stroke convex portion 87 abuts against the other end of the fan-shaped groove 86, the emergency drive disk 44 is located in the second position; a yield groove 88 is provided on the outer side of the valve body 1 at a position corresponding to the outer end of the shaft hole 49, and a limit nut 89 is threadedly connected to the outer end of the emergency operating lever 48, and a gasket 90 is sandwiched between the limit nut 89 and the inner end of the yield groove 88, the outer end of the emergency operating lever 48, the limit nut 89 and the gasket 90 are all arranged in the yield groove 88, and a second hexagonal groove 91 is provided on the outer end of the emergency operating lever 48. This design can limit the emergency operating rod 48 axially and also provide it with an angular limit function, so that the user can adjust the emergency drive disc 44 to the first position or the second position accurately.

Claims

1. A solenoid valve with a longer service life, comprising a valve body (1), a sealing assembly (2) and an electromagnetic drive assembly (3), wherein the valve body (1) is provided with an inlet flow channel (4) and an outlet flow channel (5), wherein an annular sealing seat (6) is provided in the valve body (1) at a position corresponding to between the inlet flow channel (4) and the outlet flow channel (5), wherein an end cover (7) is provided at the upper opening of the valve body (1), and the electromagnetic drive assembly (3) is mounted on the upper end of the end cover (7) to control the sealing assembly (2) to abut against or move away from the upper end of the annular sealing seat (6) to achieve conduction or blocking of the inlet flow channel (4) and the outlet flow channel (5); the characteristics are: The sealing assembly (2) comprises a water retaining plate (8) and a diaphragm (9), wherein the diaphragm (9) is mounted on the water retaining plate (8), the diaphragm (9) comprises a diaphragm body (10) and an elastic portion (11) arranged at the outer edge of the diaphragm body (10), the elastic portion (11) comprising an elastic inner ring (12), an elastic outer ring (13) and a connecting flange (14) in an integrated structure, the elastic inner ring (12) presenting a bell-mouth structure with a larger upper portion and a smaller lower portion, the water retaining plate (8) being connected to the inner side of the elastic inner ring (12), the lower end of the elastic inner ring (12) being connected to the outer edge of the diaphragm body (10), the upper end of the elastic inner ring (12) being connected to the upper end of the elastic outer ring (13), the connecting flange (14) being arranged at the lower end of the elastic outer ring (13) for connecting to the inner wall of the valve body (1); and an emergency mechanism (43) comprising an emergency drive plate (44), A follower sleeve (45) and a plurality of check valves (46), the emergency drive disc (44) being rotatably arranged on the inner side of the annular sealing seat (6), the emergency drive disc (44) being provided with a plurality of first through holes (47) distributed in a circumferential array, an emergency operating rod (48) being provided in the middle of the emergency drive disc (44), an axial hole (49) being provided at the bottom of the valve body (1), the emergency operating rod (48) passing through the axial hole (49) and extending to the outside of the valve body (1), and a first sealing ring (50) for forming a sealing fit with the inner wall of the axial hole (49) being provided on the outer periphery of the emergency operating rod (48), a positioning step (51) being provided on the outer periphery of the annular sealing seat (6), the follower sleeve (45) being rotatably arranged on the outer periphery of the annular sealing seat (6), and a latch (52) for limiting the follower sleeve (45) on the positioning step (51) being inserted on the outer periphery of the annular sealing seat (6); The emergency drive disc (44) is provided with a first annular groove (53) on its outer periphery, a plurality of first mounting grooves (54) are provided on its inner circumference, a first magnet (55) is embedded in each first mounting groove (54), a first rubber ring (56) is sleeved on the first annular groove (53), the first rubber ring (56) restricts the first magnet (55) in the corresponding first mounting groove (54), a second annular groove (57) is provided on its inner periphery, a plurality of second mounting grooves (58) corresponding to the first mounting groove (54) are provided on the inner circumference of the follower sleeve (45), a second annular groove (57) is provided with a plurality of second mounting grooves (58) corresponding to the first mounting groove (54), a second magnet (59) is embedded in each second mounting groove (58), a second rubber ring (60) is sleeved on the second annular groove (57), the second rubber ring (60) restricts the second magnet (59) in the corresponding second mounting groove (58), the first magnet (55) and the corresponding second magnet (59) are arranged to attract each other with their magnetic poles; The annular sealing seat (6) has a plurality of inner holes (61) distributed in a circumferential array on the side thereof, the follower sleeve (45) is provided with a plurality of outer holes (62) corresponding to the inner holes (61), and a second sealing ring (63) for forming a sealing fit with the inner wall of the follower sleeve (45) is respectively provided at upper and lower positions of the outer side of the annular sealing seat (6) corresponding to the inner hole (61), and when the emergency drive disc (44) drives the follower sleeve (45) to rotate by magnetic attraction, there is a first position in which the outer hole (62) on the follower sleeve (45) is in communication with the inner hole (61) on the annular sealing seat (6), and a second position in which the outer hole (62) on the follower sleeve (45) and the inner hole (61) on the annular sealing seat (6) are completely blocked, and the check valve (46) is installed on the corresponding outer hole (62).

2. A solenoid valve with a longer service life according to claim 1, characterized in that: The electromagnetic drive assembly (3) comprises a coil frame (15), an electromagnetic coil (16), an inner sleeve (17) and a valve core (18); the coil frame (15) is mounted on the end cover (7); a plastic sealing body (19) arranged in an annular shape is arranged on the coil frame (15); the electromagnetic coil (16) is arranged in the plastic sealing body (19); the inner sleeve (17) axially penetrates the center of the coil frame (15); the valve core (18) can be movably arranged in the inner sleeve (17) along the axial direction for contact with the seal. The valve body (1) is matched with the valve assembly (2), the inner sleeve (17) is also provided with a return spring (20) for applying an axial force to the valve core (18), the inner end of the inner sleeve (17) is provided with a clamping portion (21), and the inner wall of the valve body (1) is provided with a connecting groove (22). When the end cover (7) is installed on the valve body (1), the inner end of the end cover (7) is pressed against the upper end of the clamping portion (21) of the inner sleeve (17), so that the inner sleeve (17) presses the connecting flange (14) on the diaphragm (9) into the connecting groove (22).

3. A solenoid valve with a longer service life according to claim 2, characterized in that: An annular clamping portion (23) is arranged on the inner side of the elastic inner ring (12), and the cross section of the annular clamping portion (23) is conical, rectangular or circular. The outer periphery of the water retaining plate (8) is provided with an annular clamping groove (24) which matches the annular clamping portion (23); a middle hole (25) is arranged in the middle of the diaphragm body (10), and a connecting rod (26) is arranged on the water retaining plate (8), and the connecting rod (26) passes through the middle hole (25), and a limiting portion (27) which is pressed against the bottom end of the diaphragm body (10) is arranged on the outer periphery of the connecting rod (26).

4. A solenoid valve with a longer service life according to claim 3, characterized in that: The outer periphery of the limiting portion (27) is provided with a sealing groove (28) for installing a sealing ring. When the electromagnetic drive component (3) presses the sealing component (2) onto the annular sealing seat (6), the outer periphery of the limiting portion (27) fits with the inner wall of the annular sealing seat (6). The upper end of the diaphragm body (10) is also provided with a plurality of sealing convex ribs (29) which are concentrically arranged and abut against the lower end of the water retaining plate (8).

5. A solenoid valve with a longer service life according to claim 4, characterized in that: A first annular inner recess (30) is provided at the outer edge of the upper end of the diaphragm body (10), and a second annular inner recess (31) is provided at the outer edge of the lower end of the water retaining plate (8). The first annular inner recess (30) and the second annular inner recess (31) are combined to form a first chamber (32). A second chamber (33) is provided above the corresponding sealing component (2) in the valve body (1). The diaphragm body (10) is provided with a plurality of first through holes (34) in a circular array for connecting the inlet flow channel (4) with the first chamber (32). The water retaining plate (8) is provided with a second through hole (35) for connecting the first chamber (32) with the second chamber (33), and the water retaining plate (8) is provided with a third through hole (36) for connecting the second chamber (33) with the outlet flow channel (5) at a position directly below the valve core (18).

6. The solenoid valve with a longer service life according to claim 1, characterized in that: A filter screen (37) is arranged in the inlet flow channel (4), and the filter screen (37) comprises an annular base (38), a hemispherical guide portion (39) arranged in the middle of the annular base (38), and an annular support portion (40) arranged on the outer periphery of the annular base (38). A support step (41) is arranged in the inlet flow channel (4), and the annular base (38) abuts against the support step (41). The hemispherical guide portion (39) protrudes in a direction away from the outlet flow channel (5), and the annular support portion (40) extends in a direction away from the outlet flow channel (5), and the outer circular surface of the annular support portion (40) is tightly fitted with the inner circular surface of the inlet flow channel (4). An annular material storage trough (42) is formed between the annular base (38), the hemispherical guide portion (39) and the annular support portion (40).

7. The solenoid valve with a longer service life according to claim 1, characterized in that: The check valve (46) comprises a sleeve (64), a support plate (65), a valve flap (66) and a preload spring (67). The sleeve (64) is threadedly connected to the outer end of the corresponding outer hole (62), and the outer end of the sleeve (64) is threadedly connected to a locking nut (68), and the locking nut (68) is tightly abutted against the outer wall of the annular sealing seat (6). The support plate (65) is threadedly connected to the sleeve (64). A plurality of second through holes (69) are distributed in a circumferential array on the support plate (65). A guide hole (70) with a square cross section is provided at the center of the support plate (65). The valve flap (66) The valve flap (66) is arranged in the sleeve (64), and a guide rod (71) extending in the axial direction and having a square cross section is provided on the valve flap (66). The guide rod (71) passes through the guide hole (70). A sealing flange (72) extending toward the inner circumference is provided at the inlet of the outer end of the sleeve (64). The preload spring (67) is sleeved on the outer circumference of the guide rod (71), and one end of the preload spring (67) is abutted against the support plate (65), and the other end of the preload spring (67) is abutted against the valve flap (66), so that the valve flap (66) is pressed against the sealing flange (72). The outer end of the valve flap (66) is also provided with a first hexagonal groove (73).

8. The solenoid valve with a longer service life according to claim 1, characterized in that: A positioning groove (74) is provided on the inner wall of the valve body (1), the bottom of the annular sealing seat (6) is embedded in the positioning groove (74), and a sealing gasket (75) is sandwiched between the bottom end of the annular sealing seat (6) and the inner end surface of the positioning groove (74), one side of the positioning groove (74) is provided with a locking hole (76) connected to the inlet flow channel (4), and the other side of the positioning groove (74) is provided with an L-shaped locking groove (77) connected to the upper end of the positioning groove (74), the outer side of the annular sealing seat (6) is provided with a locking assembly (78) and a fixed locking block (79), the locking assembly (78) includes a movable locking block (80), a locking spring (81) and a pressure cover (82), the outer side of the annular sealing seat (6) is provided with a first side hole (83), the pressure cover (8 2) installed at the outer end of the first side hole (83), the movable locking block (80) passes through the pressure cover (82), and the inner end of the movable locking block (80) is provided with a limiting convex edge (84) which forms a travel limit with the pressure cover (82), and the locking spring (81) is arranged in the first side hole (83) to apply an outward spring force to the movable locking block (80); the outer side of the annular sealing seat (6) is also provided with a second side hole (85), and one end of the fixed locking block (79) is threadedly connected to the second side hole (85); when the bottom of the annular sealing seat (6) is installed in the positioning groove (74) and the fixed locking block (79) slides to the innermost end of the L-shaped locking groove (77), the movable locking block (80) moves outward under the push of the locking spring (81) and extends into the locking hole (76).

9. The solenoid valve with a longer service life according to claim 1, characterized in that: The inner wall of the valve body (1) is provided with a fan-shaped groove (86) at a position corresponding to the inner end of the shaft hole (49), and the outer periphery of the emergency operating lever (48) is provided with a stroke convex portion (87). When the emergency operating lever (48) rotates, the stroke convex portion (87) rotates in the fan-shaped groove (86), and when the stroke convex portion (87) abuts against one end of the fan-shaped groove (86), the emergency drive disc (44) is located in the first position, and when the stroke convex portion (87) abuts against the other end of the fan-shaped groove (86), the emergency drive disc (44) is located in the first position. ) is located in the second position; a clearance groove (88) is provided at a position on the outer side of the valve body (1) corresponding to the outer end of the shaft hole (49); the outer end of the emergency operating rod (48) is threadedly connected to a limit nut (89); a gasket (90) is sandwiched between the limit nut (89) and the inner end of the clearance groove (88); the outer end of the emergency operating rod (48), the limit nut (89) and the gasket (90) are all arranged in the clearance groove (88), and the outer end of the emergency operating rod (48) is provided with a second hexagonal groove (91).

Images