A positive flow electromagnetic valve suitable for vertical installation

Abstract

The utility model provides a kind of adaptation vertical installation's positive direction large flow solenoid valve, including main valve assembly, piston assembly, pilot assembly and coil assembly;Main valve assembly includes valve body and valve seat, the front end of valve body is equipped with main inflow passage, the rear end of valve body is equipped with main outflow passage, the lower end of valve seat is connected with valve body, the upper end of valve seat is inclined and extended to the top of main outflow passage;Pilot assembly includes magnetic isolation tube, movable core and pilot spring;Coil assembly is set outside magnetic isolation tube.In need to install the above-mentioned solenoid valve vertically, the main inflow passage of valve body is connected with the pipe fitting below, and the main outflow passage of valve body is connected with the pipe fitting above.Because the upper end of valve seat is inclined and extended to the top of main outflow passage, so when the above-mentioned solenoid valve is installed vertically, movable core and lower sealing block are not easy to deviate in vertical direction due to vibration, with higher reliability.

Description

Technical Field

[0001] This utility model relates to solenoid valves, and more particularly to a positive high-flow solenoid valve adapted for vertical installation. Background Technology

[0002] Currently, Chinese patent CN201748021U discloses a pilot-operated solenoid valve, including a valve body, valve core, valve cover, pilot assembly, and solenoid coil assembly. The pilot assembly includes a pilot head, a moving iron core, and a sealing head. The solenoid coil assembly includes a coil and a junction box. One end of the pilot head is connected to one end of the coil, which contains a stationary iron core. The other end of the coil is connected to one end of the stationary iron core via a washer and a thin nut. The other end of the stationary iron core is connected to one end of the moving iron core via a moving iron core spring, and the other end of the moving iron core is connected to the sealing head via the moving iron core spring. One end of the valve cover is connected to the other end of the pilot head, and a pilot head O-ring is provided at the connection point. The valve cover has an upper guide hole and an upper nozzle hole, and a plug is provided at the orifice of the upper nozzle hole leading to the outer diameter of the valve cover. The valve body is connected to the valve cover at one end, with an O-ring at the connection. The valve body is divided into a first valve port and a second valve port by a partition. A valve core is located at the second valve port, and a wear-resistant ring is provided at the connection between the valve core and the valve body. A valve core sealing ring at one end of the valve core is fixed to the valve core by a valve core nut. The other end of the valve core is connected to the valve cover by a valve core spring, forming a partition cavity. The valve body has a lower nozzle hole. The upper nozzle hole and the lower nozzle hole are connected, with an O-ring at the connection. The upper guide hole, the partition cavity, and the lower guide hole are connected to form the upper cavity. The first valve port and the second valve port of the valve body are connected to form the lower cavity. The valve core sealing ring of the valve core corresponds to the second valve port of the valve body. However, the above-mentioned pilot-operated solenoid valve is only suitable for horizontal installation. If the above-mentioned pilot-operated solenoid valve is installed vertically, the moving iron core and the sealing head in the above-mentioned pilot-operated solenoid valve are prone to vertical displacement due to vibration during use, which will cause the sealing head to fail to effectively seal the upper nozzle hole, affecting the reliability of the above-mentioned solenoid valve. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a positive high-flow solenoid valve that is adapted for vertical installation and has high reliability even when installed vertically.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is: a positive high-flow solenoid valve adapted for vertical installation, including a main valve assembly, a piston assembly, a pilot assembly and a coil assembly;

[0005] The main valve assembly includes a valve body and a valve seat. The front end of the valve body has a main flow inlet channel, and the rear end of the valve body has a main flow outlet channel. The lower end of the valve seat is connected to the valve body, and the upper end of the valve seat extends obliquely upward above the main flow outlet channel. The lower end of the valve seat has a control chamber, which is connected to the main flow inlet channel and the main flow outlet channel. The upper end of the valve seat has a mounting groove, and the valve seat has a secondary flow inlet channel, which is connected to the control chamber and the mounting groove. The valve seat also has a secondary flow outlet channel, which is connected to the main flow outlet channel and the mounting groove.

[0006] The piston assembly includes a piston body and a piston spring. The piston body is slidably disposed in the control chamber. A pilot channel is provided in the piston body. The pilot channel is connected to the main flow channel and the control chamber. The piston spring is disposed in the control chamber. The piston spring drives the piston body to seal the main flow channel through its elastic force.

[0007] The pilot assembly includes a magnetic shielding tube, a movable iron core, and a pilot spring. The lower end of the magnetic shielding tube is disposed in the mounting groove, and the inner cavity of the magnetic shielding tube is connected to the secondary inflow channel and the secondary outflow channel. The movable iron core is slidably disposed in the magnetic shielding tube, and a lower sealing block is disposed at the lower end of the movable iron core. The pilot spring is disposed in the magnetic shielding tube, and the pilot spring drives the lower sealing block to seal the secondary outflow channel by means of elastic force.

[0008] The coil assembly is located on the outside of the magnetic shielding tube. When the coil assembly is energized, it will drive the movable iron core to slide upward inside the magnetic shielding tube.

[0009] With the above technical solution, when the coil assembly is de-energized, the pilot spring drives the movable iron core to seal the secondary outflow channel through its elastic force. In this state, the medium in the main inflow channel will enter the control chamber and the secondary inflow channel through the pilot channel to balance the pressure between the main inflow channel and the control chamber. At this time, the piston body will seal the main inflow channel under the elastic force of the piston spring, so that the solenoid valve is in the closed state.

[0010] When the coil assembly is energized, it drives the movable iron core upward, releasing the seal on the secondary outflow channel. At this time, the secondary inflow channel connects with the secondary outflow channel through the inner cavity of the magnetic shielding tube. In this state, the medium in the main inflow channel flows sequentially through the pilot channel, control chamber, secondary inflow channel, inner cavity of the magnetic shielding tube, and secondary outflow channel, and finally flows out through the main outflow channel. Because the diameter of the pilot channel is smaller than the diameters of the secondary inflow and outflow channels, a negative pressure gradually forms in the control chamber, driving the piston body upward and connecting the main inflow channel with the main outflow channel.

[0011] When the solenoid valve needs to be installed vertically, connect the main inlet channel of the valve body to the lower pipe fitting and the main outlet channel of the valve body to the upper pipe fitting. Because the upper end of the valve seat extends upwards to above the main outlet channel, the movable iron core and the lower sealing block are less likely to shift vertically due to vibration when the solenoid valve is installed vertically, thus ensuring high reliability.

[0012] Preferably, the upper end of the control chamber is provided with an upper storage groove, the upper end of the piston spring is disposed in the upper storage groove, the upper end of the piston body is provided with a lower storage groove, and the lower end of the piston spring is disposed in the lower storage groove.

[0013] Through the above technical solution, the upper and lower storage slots can limit the upper and lower ends of the piston spring, making it less likely for the piston spring to deviate.

[0014] Preferably, the piston body includes a piston sleeve and a piston head. An installation ring groove is formed on the outer wall of the piston body, and a sealing ring is provided in the installation ring groove. The outer ring of the sealing ring abuts against the inner wall of the control chamber. An assembly groove is formed at the lower end of the piston sleeve, and a sealing ring is provided in the assembly groove. The lower end of the piston head abuts against the sealing ring to press the sealing ring into the assembly groove. The upper end of the piston head passes through the piston sleeve and extends into the lower receiving groove. A nut is threadedly connected to the upper end of the piston head.

[0015] Through the above technical solution, the sealing ring abuts against the inner wall of the control chamber, sealing the gap between the piston sleeve and the control chamber to ensure the reliability of the solenoid valve. The sealing ring abuts against the rear end of the main inlet channel to seal the rear end of the main inlet channel. The piston head and piston sleeve are fixedly connected by a nut, making disassembly and assembly more convenient.

[0016] Preferably, the valve seat includes a valve shell and a valve cover. The valve shell is integrally formed with the valve body. The valve cover is detachably disposed at the upper end of the valve shell. The control chamber is formed by the valve shell and the valve cover. The secondary inflow channel is opened on the valve cover. The secondary outflow channel includes a secondary outflow section one opened on the valve shell and a secondary outflow section two opened on the valve cover.

[0017] By using the above technical solution, the valve seat is divided into a valve body and a valve cover, making the machining of the secondary outflow channel and the control chamber more convenient.

[0018] Preferably, the lower end of the valve cover is provided with a positioning protrusion, the positioning protrusion extends into the control chamber and abuts against the inner wall of the control chamber, and the lower receiving groove is formed at the lower end of the positioning protrusion.

[0019] Through the above technical solution, the positioning protrusion, in conjunction with the control chamber, can restrict the radial relative movement of the valve cover and the valve seat, thereby improving the connection stability between the valve cover and the valve seat.

[0020] Preferably, the upper end of the secondary outlet section one is provided with a groove one, the lower end of the secondary outlet section two is provided with a groove two, and the valve seat also includes a guide sleeve, the lower end of the guide sleeve is embedded in the groove one, and the upper end of the guide sleeve is embedded in the groove two.

[0021] The above technical solution can further improve the connection stability between the valve cover and the valve seat.

[0022] Preferably, the movable iron core has an installation chamber that is small at both ends and large in the middle. The lower sealing block is located at the lower end of the installation chamber, and the upper sealing block is located at the upper end of the installation chamber. The upper sealing block is used to abut against the upper inner wall of the magnetic shielding tube. The installation chamber is also provided with a clamping spring. The upper end of the clamping spring abuts against the upper sealing block, and the lower end of the clamping spring abuts against the lower sealing block.

[0023] Through the above technical solution, the clamping spring applies elastic force to the lower sealing block, thereby ensuring that the lower sealing block can effectively seal the end of the secondary outflow channel. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the flow channel in an embodiment;

[0025] Figure 2 for Figure 1 Enlarged view of part A;

[0026] Figure 3 This is a schematic diagram of the structure of an embodiment.

[0027] Reference numerals: 1. Main inlet channel; 2. Main outlet channel; 3. Main valve assembly; 31. Valve body; 32. Valve seat; 321. Valve shell; 322. Valve cover; 4. Piston assembly; 41. Piston body; 411. Piston sleeve; 412. Piston head; 42. Piston spring; 5. Pilot assembly; 51. Magnetic shielding tube; 52. Movable iron core; 53. Pilot spring; 6. Coil assembly; 7. Control chamber; 8. Mounting slot; 9. Secondary inlet channel 10. Secondary outflow channel; 101. Secondary outflow section one; 102. Secondary outflow section two; 11. Pilot channel; 12. Lower sealing block; 13. Upper receiving groove; 14. Lower receiving groove; 15. Mounting ring groove; 16. Sealing ring; 17. Assembly groove; 18. Sealing ring; 19. Nut; 20. Positioning protrusion; 21. Insert groove one; 22. Insert groove two; 23. Guide sleeve; 24. Mounting chamber; 25. Upper sealing block; 26. Clamping spring. Detailed Implementation

[0028] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, so that the technical solution of this utility model can be more easily understood and mastered.

[0029] A positive-flow solenoid valve adapted for vertical installation, such as Figures 1 to 3 As shown, it includes a main valve assembly 3, a piston assembly 4, a pilot assembly 5, and a coil assembly 6.

[0030] The main valve assembly 3 includes a valve body 31 and a valve seat 32. The front end of the valve body 31 has a main flow inlet channel 1, the rear end of which extends upwards at an angle. The rear end of the valve body 31 has a main flow outlet channel 2, the rear end of which also extends upwards at an angle. The lower end of the valve seat 32 is connected to the valve body 31, and the upper end of the valve seat 32 extends upwards above the main flow outlet channel 2. The lower end of the valve seat 32 has a control chamber 7, which communicates with both the main flow inlet channel 1 and the main flow outlet channel 2. The upper end of the valve seat 32 has a mounting groove 8. The front side of the valve seat 32 has a secondary flow inlet channel 9, which communicates with both the control chamber 7 and the mounting groove 8. The rear side of the valve seat 32 has a secondary flow outlet channel 10, which is Z-shaped and communicates with both the main flow outlet channel 2 and the mounting groove 8.

[0031] The upper end of the control chamber 7 is provided with an upper storage groove 13, the upper end of the piston spring 42 is provided in the upper storage groove 13, the upper end of the piston body 41 is provided with a lower storage groove 14, and the lower end of the piston spring 42 is provided in the lower storage groove 14.

[0032] The valve seat 32 includes a valve housing 321 and a valve cover 322. The valve housing 321 is integrally formed with the valve body 31. The valve cover 322 is detachably mounted on the upper end of the valve housing 321, and a sealing gasket is provided between the valve cover 322 and the valve housing 321. The control chamber 7 is enclosed by the valve housing 321 and the valve cover 322. The secondary inflow channel 9 is opened on the valve cover 322, and the secondary outflow channel 10 includes a secondary outflow section 101 opened on the valve housing 321 and a secondary outflow section 102 opened on the valve cover 322. A positioning protrusion 20 is provided at the lower end of the valve cover 322. The positioning protrusion 20 extends into the control chamber 7 and abuts against the inner wall of the control chamber 7. A lower receiving groove 14 is opened at the lower end of the positioning protrusion 20. The upper end of the secondary outlet section 101 is provided with a groove 21, and the lower end of the secondary outlet section 202 is provided with a groove 22. The valve seat 32 also includes a guide sleeve 23. The lower end of the guide sleeve 23 is embedded in the groove 21, and the upper end of the guide sleeve 23 is embedded in the groove 22. The inner diameter of the guide sleeve 23 is equal to the diameter of the secondary outlet section 101 and the secondary outlet section 202.

[0033] The piston assembly 4 includes a piston body 41 and a piston spring 42. The piston body 41 is slidably disposed in the control chamber 7. A pilot channel 11, which is larger at both ends and smaller in the middle, is formed in the piston body 41. The pilot channel 11 is connected to the main inlet channel 1 and the control chamber 7, and the maximum inner diameter of the pilot channel 11 is smaller than the diameter of the secondary inlet channel 9 and the secondary outlet channel 10. The piston spring 42 is disposed in the control chamber 7, and the piston spring 42 drives the piston body 41 to seal the main inlet channel 1 through its elastic force.

[0034] The piston body 41 includes a piston sleeve 411 and a piston head 412. A mounting ring groove 15 is formed on the outer wall of the piston body 41, and a sealing ring 16 is disposed in the mounting ring groove 15. The outer ring of the sealing ring 16 abuts against the inner wall of the control chamber 7. A mounting groove 17 is formed at the lower end of the piston sleeve 411, and a sealing ring 18 is disposed in the mounting groove 17. The lower end of the piston head 412 abuts against the sealing ring 18 to press the sealing ring 18 into the mounting groove 17. The upper end of the piston head 412 passes through the piston sleeve 411 and extends into the lower receiving groove 14. A nut 19 is threadedly connected to the upper end of the piston head 412.

[0035] The pilot assembly 5 includes a magnetic shielding tube 51, a movable iron core 52, and a pilot spring 53. The lower end of the magnetic shielding tube 51 is positioned in the mounting groove 8, and its inner cavity is connected to the secondary inflow channel 9 and the secondary outflow channel 10. The movable iron core 52 is slidably positioned within the magnetic shielding tube 51, and a lower sealing block 12 is positioned at its lower end. The pilot spring 53 is positioned within the magnetic shielding tube 51, and its elastic force drives the lower sealing block 12 to seal the secondary outflow channel 10.

[0036] The movable iron core 52 has an installation chamber 24 that is small at both ends and large in the middle. The lower sealing block 12 is located at the lower end of the installation chamber 24, and the upper sealing block 25 is located at the upper end of the installation chamber 24. The upper sealing block 25 is used to abut against the upper inner wall of the magnetic shielding tube 51. The installation chamber 24 is also equipped with a clamping spring 26. The upper end of the clamping spring 26 abuts against the upper sealing block 25, and the lower end of the clamping spring 26 abuts against the lower sealing block 12.

[0037] The coil assembly 6 is located outside the magnetic shielding tube 51. When the coil assembly 6 is energized, it will drive the movable iron core 52 to slide upward inside the magnetic shielding tube 51.

[0038] Of course, the above are just typical examples of this utility model. In addition, this utility model may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by this utility model.

Claims

1. A positive-direction high-flow solenoid valve adapted for vertical installation, comprising a main valve assembly (3), a piston assembly (4), a pilot assembly (5), and a coil assembly (6); characterized in that: The main valve assembly (3) includes a valve body (31) and a valve seat (32). The valve body (31) has a main flow inlet channel (1) at its front end and a main flow outlet channel (2) at its rear end. The lower end of the valve seat (32) is connected to the valve body (31), and the upper end of the valve seat (32) extends obliquely upward above the main flow outlet channel (2). A control chamber (7) is formed at the lower end of the valve seat (32). The control chamber (7) is connected to... The main inlet channel (1) and the main outlet channel (2) are connected. The upper end of the valve seat (32) is provided with an installation groove (8). The valve seat (32) is provided with a secondary inlet channel (9). The secondary inlet channel (9) is connected with the control chamber (7) and the installation groove (8). The valve seat (32) is provided with a secondary outlet channel (10). The secondary outlet channel (10) is connected with the main outlet channel (2) and the installation groove (8). The piston assembly (4) includes a piston body (41) and a piston spring (42). The piston body (41) is slidably disposed in the control chamber (7). A pilot channel (11) is provided in the piston body (41). The pilot channel (11) is connected to the main flow channel (1) and the control chamber (7). The piston spring (42) is disposed in the control chamber (7). The piston spring (42) drives the piston body (41) to seal the main flow channel (1) by means of elastic force. The pilot assembly (5) includes a magnetic shielding tube (51), a movable iron core (52), and a pilot spring (53). The lower end of the magnetic shielding tube (51) is disposed in the mounting groove (8), and the inner cavity of the magnetic shielding tube (51) is connected to the secondary inflow channel (9) and the secondary outflow channel (10). The movable iron core (52) is slidably disposed in the magnetic shielding tube (51), and a lower sealing block (12) is disposed at the lower end of the movable iron core (52). The pilot spring (53) is disposed in the magnetic shielding tube (51), and the pilot spring (53) drives the lower sealing block (12) to seal the secondary outflow channel (10) by elastic force. The coil assembly (6) is located outside the magnetic shielding tube (51). When the coil assembly (6) is energized, the coil assembly (6) will drive the movable iron core (52) to slide upward inside the magnetic shielding tube (51).

2. The positive high-flow solenoid valve adapted for vertical installation according to claim 1, characterized in that: The upper end of the control chamber (7) is provided with an upper storage groove (13), the upper end of the piston spring (42) is disposed in the upper storage groove (13), the upper end of the piston body (41) is provided with a lower storage groove (14), and the lower end of the piston spring (42) is disposed in the lower storage groove (14).

3. A positive high-flow solenoid valve adapted for vertical installation according to claim 2, characterized in that: The piston body (41) includes a piston sleeve (411) and a piston head (412). An installation ring groove (15) is provided on the outer wall of the piston body (41). A sealing ring (16) is provided in the installation ring groove (15). The outer ring of the sealing ring (16) abuts against the inner wall of the control chamber (7). An assembly groove (17) is provided at the lower end of the piston sleeve (411). A sealing ring (18) is provided in the assembly groove (17). The lower end of the piston head (412) abuts against the sealing ring (18) to press the sealing ring (18) into the assembly groove (17). The upper end of the piston head (412) passes through the piston sleeve (411) and extends into the lower receiving groove (14). A nut (19) is threadedly connected to the upper end of the piston head (412).

4. A positive high-flow solenoid valve adapted for vertical installation according to claim 2, characterized in that: The valve seat (32) includes a valve shell (321) and a valve cover (322). The valve shell (321) is integrally formed with the valve body (31). The valve cover (322) is detachably disposed on the upper end of the valve shell (321). The control chamber (7) is formed by the valve shell (321) and the valve cover (322). The secondary inflow channel (9) is opened on the valve cover (322). The secondary outflow channel (10) includes a secondary outflow section one (101) opened on the valve shell (321) and a secondary outflow section two (102) opened on the valve cover (322).

5. A positive high-flow solenoid valve adapted for vertical installation according to claim 4, characterized in that: The lower end of the valve cover (322) is provided with a positioning protrusion (20), which extends into the control chamber (7) and abuts against the inner wall of the control chamber (7). The lower receiving groove (14) is opened at the lower end of the positioning protrusion (20).

6. A positive high-flow solenoid valve adapted for vertical installation according to claim 4, characterized in that: The upper end of the secondary outlet section one (101) is provided with a groove one (21), the lower end of the secondary outlet section two (102) is provided with a groove two (22), the valve seat (32) also includes a guide sleeve (23), the lower end of the guide sleeve (23) is embedded in the groove one (21), and the upper end of the guide sleeve (23) is embedded in the groove two (22).

7. A positive high-flow solenoid valve adapted for vertical installation according to claim 1, characterized in that: The movable iron core (52) has an installation chamber (24) that is small at both ends and large in the middle. The lower sealing block (12) is located at the lower end of the installation chamber (24). The upper sealing block (25) is located at the upper end of the installation chamber (24). The upper sealing block (25) is used to abut against the inner wall of the upper end of the magnetic shielding tube (51). The installation chamber (24) is also provided with a clamping spring (26). The upper end of the clamping spring (26) abuts against the upper sealing block (25), and the lower end of the clamping spring (26) abuts against the lower sealing block (12).

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