Solenoid valve

Abstract

This utility model belongs to the field of solenoid valve technology and discloses a solenoid valve, which further includes: a sliding disc; a valve seat fixedly connected to the middle of the sliding disc; a fixing sleeve fixed to the upper end of the valve seat, the fixing sleeve having a movable cavity inside and an opening communicating with the movable cavity at the upper end of the fixing sleeve; a blocking block; a control rod; and an electromagnetic drive, used for: in the energized state, driving the control rod to pull the blocking block upward to expose the second balance channel, causing the fixing sleeve to pull the valve seat upward and disengage from the outlet chamber as the blocking block moves upward, thereby opening the valve; in the de-energized state, driving the control rod to push the blocking block downward to block the second balance channel, causing the valve seat to move downward as the blocking block moves downward to block the outlet chamber, thereby closing the valve. This utility model not only ensures that the opening and closing of the solenoid valve are not affected by the pressure difference between the inlet and outlet, but also that the greater the pressure difference, the faster the solenoid valve opens and the better the sealing effect when the solenoid valve closes.

Description

Technical Field

[0001] This utility model belongs to the field of electromagnetic valve technology, and specifically relates to an electromagnetic valve. Background Technology

[0002] Solenoid valves are a type of electric valve that uses the magnetic field generated by an electromagnetic coil to pull the valve core, changing the valve's on / off state. When the coil is de-energized, the valve core returns to its original position due to spring pressure. They are widely used in various fields. However, the sealing structure in current solenoid valves still has shortcomings. When the coil is energized, the valve core experiences resistance due to the pressure difference between the inlet and outlet, resulting in a slow opening response. Therefore, we propose a solenoid valve to solve these problems. Utility Model Content

[0003] To address the aforementioned issues, this invention provides a solenoid valve that solves the problem of slow opening response of the solenoid valve caused by the pressure difference between the inlet and outlet when the coil is energized.

[0004] This utility model is achieved through the following scheme: A solenoid valve includes a valve cover and a valve body. The lower part of the valve cover has a receiving cavity, and the upper part of the valve cover has an opening communicating with the receiving cavity. The valve body is connected to the lower part of the valve cover. The valve body has an air inlet and an air outlet at its two ends, respectively. The valve body has an air inlet chamber and an air outlet chamber communicating with the air inlet and air outlet, respectively. Both the air inlet chamber and the air outlet chamber are communicating with the receiving cavity. The valve body also includes:

[0005] A sliding disc is slidably connected to the inside of the receiving cavity, and the sliding disc has a first balancing channel for communicating the air intake cavity and the receiving cavity;

[0006] A valve seat fixedly connected to the middle of the sliding disc is used to block the air outlet chamber;

[0007] A fixed sleeve is fixed to the upper end of the valve seat. The fixed sleeve has a movable cavity inside. The upper end of the fixed sleeve has a through hole communicating with the movable cavity. The outside of the fixed sleeve has a through hole for communicating with the receiving cavity. A second balance channel communicating between the movable cavity and the air outlet cavity is passed through the valve seat. The diameter of the second balance channel is larger than the diameter of the first balance channel.

[0008] The sealing block is slidably connected to the movable cavity;

[0009] The control rod has one end fixedly connected to the upper end of the sealing block, and the other end extends out of the movable cavity and through the opening;

[0010] The electromagnetic drive unit connected to the other end of the control lever is used to: drive the control lever to pull the blocking block upward in the energized state to expose the second balance channel, so that the fixed sleeve pulls the valve seat upward and separates it from the air outlet chamber as the blocking block moves upward, thereby opening the valve; drive the control lever to push the blocking block downward in the de-energized state to block the second balance channel, so that the valve seat moves downward as the blocking block moves downward to block the air outlet chamber, thereby closing the valve.

[0011] A further improvement of this utility model solenoid valve is that the sliding disc is made entirely of a corrosion-resistant hard material.

[0012] A further improvement of the solenoid valve of this utility model is that a first sealing gasket is fixedly connected to the lower end of the sliding disc, and the first sealing gasket is sleeved on the outside of the valve seat to cooperate with the valve seat to block the air outlet chamber.

[0013] A further improvement of the solenoid valve of this invention is that a second sealing gasket is provided on the outside of the sliding disc.

[0014] A further improvement of the solenoid valve of this utility model is that a third sealing gasket is fixedly connected to the bottom of the sealing block, and the size of the third sealing gasket is sufficient to completely seal the second balance port.

[0015] A further improvement of the solenoid valve of this utility model is that the electromagnetic drive component includes a coil connected to the top of the valve cover, an adjustment cavity is provided in the middle of the coil, a stationary iron core is fixedly connected to the upper part of the adjustment cavity, an armature connected to the control rod is slidably connected to the lower part of the adjustment cavity, and a spring is fixedly connected between the stationary iron core and the armature.

[0016] A further improvement of the solenoid valve of this invention is that it also includes a fastening assembly for fixing the armature to the control rod.

[0017] A further improvement of this utility model's solenoid valve is that the fastening assembly includes a recess, two screw holes, two insertion holes, and two bolts. The recess is located at the lower part of the armature for the other end of the control rod to be inserted. The two screw holes are respectively located on both sides of the armature and both screw holes communicate with the recess. The two insertion holes are respectively located on both sides of the other end of the control rod. When the other end of the control rod is fully inserted into the recess, the two insertion holes correspond to the two screw holes. Tightening the two bolts allows them to pass through the two screw holes and be inserted into the corresponding insertion holes, thereby fixing the armature to the control rod.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] This invention not only ensures that the opening and closing of the solenoid valve are not affected by the pressure difference between the air inlet and outlet, but also that the greater the pressure difference, the faster the solenoid valve opens and the better the sealing effect when the solenoid valve closes. Attached Figure Description

[0020] Figure 1 The diagram shows cross-sectional views of the various structures of the solenoid valve of this invention when it is energized.

[0021] Figure 2 The diagram shows cross-sectional views of the various structures of the solenoid valve of this invention when it is de-energized.

[0022] Figure 3 A cross-sectional structural diagram of the valve seat mounting position of this utility model is shown.

[0023] In the diagram: 1. Valve body; 101. Air inlet; 102. Air inlet chamber; 103. Air outlet; 104. Air outlet chamber; 2. Valve cover; 3. Receiving chamber; 4. Sliding disc; 401. Second sealing gasket; 5. Valve seat; 501. First sealing gasket; 6. Second balancing channel; 7. Control rod; 8. Electromagnetic drive component; 801. Coil; 802. Adjustment chamber; 803. Stationary iron core; 804. Armature; 805. Spring; 9. Sealing block; 901. Third sealing gasket; 10. Movable chamber; 11. Fixed sleeve; 12. Perforation; 13. First balancing channel; 14. Fastening assembly. Detailed Implementation

[0024] To address the problem of slow opening response of the solenoid valve caused by the pressure difference between the inlet and outlet when the coil is energized, the present invention provides a solenoid valve. The following description, in conjunction with specific embodiments and accompanying drawings, further illustrates this solenoid valve.

[0025] See Figures 1-3 As shown, a solenoid valve includes a valve cover 2 and a valve body 1. The lower part of the valve cover 2 has a receiving cavity 3, and the upper part of the valve cover 2 has an opening communicating with the receiving cavity 3. The valve body 1 is connected to the lower part of the valve cover 2. The valve body 1 has an air inlet 101 and an air outlet 103 at its two ends, respectively. The valve body 1 has an air inlet chamber 102 and an air outlet chamber 104 communicating with the air inlet 101 and the air outlet 103, respectively. Both the air inlet chamber 102 and the air outlet chamber 104 are connected to the receiving cavity 3. The valve body 1 also includes:

[0026] A sliding disk 4 is slidably connected to the inside of the receiving cavity 3. The sliding disk 4 has a first balancing channel 13 for communicating the air intake cavity 102 with the receiving cavity 3.

[0027] The valve seat 5, which is fixedly connected to the middle of the sliding disc 4, is used to block the air outlet chamber 104;

[0028] A fixed sleeve 11 is fixed to the upper end of the valve seat 5. The fixed sleeve 11 has a movable cavity 10 inside. The upper end of the fixed sleeve 11 has a through-hole communicating with the movable cavity 10. The outside of the fixed sleeve 11 has a through-hole 12 for communicating the movable cavity 10 with the receiving cavity 3 (there are multiple through-holes 12, and the flow rate of multiple through-holes 12 is greater than the flow rate of the second balance channel 6). The valve seat 5 has a second balance channel 6 that communicates between the movable cavity 10 and the air outlet cavity 104. The diameter of the second balance channel 6 is larger than the diameter of the first balance channel 13 (the second balance channel 6 can be designed to be 2mm, and the first balance channel 13 can be designed to be 1mm).

[0029] The sealing block 9 is slidably connected to the movable cavity 10;

[0030] The control rod 7 is fixedly connected to the upper end of the sealing block 9 at one end and extends out of the movable cavity 10 and through the opening at the other end;

[0031] The electromagnetic drive unit 8 connected to the other end of the control rod 7 is used to: drive the control rod 7 to pull the blocking block 9 upward in the energized state to expose the second balance channel 6, so that the fixing sleeve 11 pulls the valve seat 5 upward and disengages from the air outlet chamber 104 as the blocking block 9 moves upward, thereby realizing valve opening; drive the control rod 7 to push the blocking block 9 downward in the de-energized state to block the second balance channel 6, so that the valve seat 5 moves downward as the blocking block 9 moves downward to block the air outlet chamber 104, thereby realizing valve closing.

[0032] In this embodiment, when the pressures at the inlet 101 and outlet 103 are the same, the electromagnetic drive 8 is energized to drive the control rod 7 to pull the sealing block 9 upward along the movable cavity 10. This will first expose the second balance channel 6, and the fluid in the outlet cavity 104 will quickly enter the movable cavity 10 through the second balance channel 6, and then enter the area of ​​the receiving cavity 3 above the sliding plate 4 through the perforation 12. This makes the pressure in this area the same as the pressure in the outlet cavity 104. Since the pressures at the inlet 101 and outlet 103 are the same, the pressure in this area is the same as the pressure in the inlet cavity 102. The upward-moving sealing block 9 can pull the fixed sleeve 11, valve seat 5 and sliding plate 4 upward, thereby opening the valve.

[0033] Under positive pressure conditions, when the pressure in the intake chamber 102 is greater than the pressure in the outlet chamber 104, the electromagnetic drive 8 is energized, which drives the control rod 7 to pull the sealing block 9 upward along the movable chamber 10. This exposes the second balance channel 6, allowing the fluid in the outlet chamber 104 to quickly enter the movable chamber 10 through the second balance channel 6, and then through the perforation 12 into the area of ​​the receiving chamber 3 above the sliding plate 4. This makes the pressure in this area equal to the pressure in the outlet chamber 104. Since the diameter of the second balance channel 6 is larger than the diameter of the first balance channel 13, the fluid in the outlet chamber 104 can enter the receiving chamber 3 much faster than the fluid in the intake chamber 102. Because the pressure in the intake chamber 102 is greater than the pressure in the outlet chamber 104, the fluid in the intake chamber 102... The upward force exerted on the sliding plate 4 during its upward movement, in conjunction with the electromagnetic drive, facilitates the opening of the solenoid valve. When the solenoid valve is de-energized, the electromagnetic drive 8 drives the control rod 7 downward, thereby pushing the sealing block 9 to first block the second balance channel 6, and then pushing the sliding plate 4 downward. The fluid in the intake chamber 102 then enters the area of ​​the receiving chamber 3 above the sliding plate 4 through the first balance pipe, thus making the pressure in the intake chamber 102 and the receiving chamber 3 the same. Since the pressure in the intake chamber 102 is greater than the pressure in the outlet chamber 104, the sliding plate 4 will be subjected to the downward pressure of the fluid in the receiving chamber 3 during its downward movement. This causes the valve seat 5 to quickly block the outlet chamber 104, facilitating the closing of the solenoid valve and improving the sealing effect.

[0034] When the outlet 103 is under negative pressure, and the negative pressure is greater than that of the inlet 101, the electromagnetic drive 8 is energized, which drives the control rod 7 to pull the sealing block 9 upward along the movable cavity 10. This will first expose the second balance channel 6, and the fluid in the outlet cavity 104 will quickly enter the movable cavity 10 through the second balance channel 6, and then enter the area of ​​the receiving cavity 3 above the sliding plate 4 through the perforation 12. This makes the pressure in this area the same as the pressure in the outlet cavity 104. Since the diameter of the second balance channel 6 is larger than the diameter of the first balance channel 13, the fluid in the outlet cavity 104 can enter the receiving cavity 3 faster than the fluid in the inlet cavity 102. Since the negative pressure in the outlet cavity 104 is greater than that in the inlet cavity 102, the fluid in the area of ​​the receiving cavity 3 above the sliding plate 4 will pull the sliding plate 4. During the upward movement, the sliding plate 4 is attracted upward, thus cooperating with the electromagnetic drive to facilitate the opening of the solenoid valve. When the solenoid valve is de-energized, the electromagnetic drive 8 drives the control rod 7 downward, thereby pushing the sealing block 9 to first block the second balance channel 6, and then pushing the sliding plate 4 downward. The fluid in the intake chamber 102 will enter the area of ​​the receiving chamber 3 above the sliding plate 4 through the first balance pipe, so that the pressure in the intake chamber 102 and the receiving chamber 3 are the same. Since the negative pressure of the outlet chamber 104 is greater than that of the intake chamber 102, the negative pressure of the outlet chamber 104 is greater than that of the area of ​​the receiving chamber 3 above the sliding plate 4. Therefore, during the downward movement of the sliding plate 4, it will be attracted by the outlet chamber 104, so that the valve seat 5 quickly blocks the outlet chamber 104, which facilitates the closing of the solenoid valve and makes the sealing effect better.

[0035] By adopting the above design, it can be ensured that the opening and closing of the solenoid valve are not affected by the pressure difference between the air inlet 101 and the air outlet 103. Moreover, the greater the pressure difference, the faster the solenoid valve opens and the better the sealing effect when the solenoid valve closes.

[0036] The sliding disk 4 is made entirely of a corrosion-resistant hard material.

[0037] Specifically, in this embodiment, the sliding disk 4 is made of SS316 stainless steel.

[0038] By adopting the above design, the sliding disk 4 is designed as a rigid component, which is more resistant to corrosion and oxidation than soft rubber pads, and can greatly improve its service life.

[0039] The lower end of the sliding disc 4 is fixedly connected to a first sealing gasket 501, and the first sealing gasket 501 is sleeved on the outside of the valve seat 5 to cooperate with the valve seat 5 to block the air outlet chamber 104.

[0040] Specifically, the first sealing gasket 501 is made of FKM fluororubber material;

[0041] By adopting the above design, the sealing effect of valve seat 5 on air outlet chamber 104 can be improved.

[0042] The sliding disk 4 is fitted with a second sealing gasket 401.

[0043] Specifically, the second sealing gasket 401 is made of PTFE carbon fiber material. There are two second sealing gaskets 401, and the two second sealing gaskets 401 are respectively fitted on the upper and lower parts of the sliding disk 4.

[0044] By adopting the above design, the second sealing gasket 401 can enhance the sealing effect between the sliding disc 4 and the receiving cavity 3, reduce friction, improve corrosion resistance, and make it easy to replace.

[0045] The bottom of the sealing block 9 is fixedly connected to a third sealing gasket 901, and the size of the third sealing gasket 901 is sufficient to completely seal the second balance port.

[0046] Specifically, the third sealing gasket 901 is made of FKM fluororubber material;

[0047] By adopting the above design, the sealing effect of the second balance port can be increased by using the third sealing gasket 901 to seal the lower part of the sealing block 9.

[0048] The electromagnetic drive component 8 includes a coil 801 connected to the top of the valve cover 2. An adjustment cavity 802 is provided in the middle of the coil 801. A stationary iron core 803 is fixedly connected to the upper part of the adjustment cavity 802. An armature 804 connected to the control rod 7 is slidably connected to the lower part of the adjustment cavity 802. A spring 805 is fixedly connected between the stationary iron core 803 and the armature 804.

[0049] When the coil 801 is energized, it has a magnetic force, which drives the armature 804 to move toward the stationary iron core 803. During this process, the spring 805 is compressed, thereby opening the solenoid valve. When the coil 801 is de-energized and loses its magnetic force, the elastic spring 805 will push the armature 804 downward, thereby closing the solenoid valve (the electromagnetic drive technology of the solenoid valve is existing technology and will not be elaborated on here).

[0050] It also includes a fastening assembly 14 for fixing the armature 804 to the control lever 7.

[0051] The fastening assembly 14 includes a recess, two screw holes, two insertion holes, and two bolts. The recess is located at the lower part of the armature 804 for the other end of the control rod 7 to be inserted. The two screw holes are respectively located on both sides of the armature 804 and both screw holes communicate with the recess. The two insertion holes are respectively located on both sides of the other end of the control rod 7. When the other end of the control rod 7 is fully inserted into the recess, the two insertion holes correspond to the two screw holes. Tightening the two bolts allows them to pass through the two screw holes and be inserted into the corresponding insertion holes, thereby fixing the armature 804 to the control rod 7.

[0052] The above design facilitates the assembly and disassembly of the control lever 7 and the armature 804.

[0053] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0054] The present invention has been described in detail above with reference to the accompanying drawings and embodiments. Those skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention, and the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. A solenoid valve, comprising a valve cover and a valve body, wherein the lower part of the valve cover has a receiving cavity, the upper part of the valve cover has an opening communicating with the receiving cavity, the valve body is connected to the lower part of the valve cover, the two ends of the valve body are respectively provided with an air inlet and an air outlet, and the valve body has an air inlet chamber and an air outlet chamber respectively communicating with the air inlet and the air outlet, wherein both the air inlet chamber and the air outlet chamber are communicating with the receiving cavity, characterized in that, Also includes: A sliding disc is slidably connected to the inside of the receiving cavity, and the sliding disc has a first balancing channel for communicating the air intake cavity and the receiving cavity; A valve seat fixedly connected to the middle of the sliding disc is used to block the air outlet chamber; A fixed sleeve is fixed to the upper end of the valve seat. The fixed sleeve has a movable cavity inside. The upper end of the fixed sleeve has a through hole communicating with the movable cavity. The outside of the fixed sleeve has a through hole for communicating with the receiving cavity. A second balance channel communicating between the movable cavity and the air outlet cavity is passed through the valve seat. The diameter of the second balance channel is larger than the diameter of the first balance channel. The sealing block is slidably connected to the movable cavity; The control rod has one end fixedly connected to the upper end of the sealing block, and the other end extends out of the movable cavity and through the opening; The electromagnetic drive unit connected to the other end of the control lever is used to: drive the control lever to pull the blocking block upward in the energized state to expose the second balance channel, so that the fixed sleeve pulls the valve seat upward and separates it from the air outlet chamber as the blocking block moves upward, thereby opening the valve; drive the control lever to push the blocking block downward in the de-energized state to block the second balance channel, so that the valve seat moves downward as the blocking block moves downward to block the air outlet chamber, thereby closing the valve.

2. The electromagnetic valve according to claim 1, wherein The sliding disk is made entirely of a corrosion-resistant hard material.

3. The electromagnetic valve according to claim 1, wherein The lower end of the sliding disc is fixedly connected to a first sealing gasket, which is sleeved on the outside of the valve seat to cooperate with the valve seat to block the air outlet chamber.

4. The electromagnetic valve according to claim 1, wherein The sliding disk is fitted with a second sealing gasket.

5. The electromagnetic valve according to claim 1, wherein The bottom of the sealing block is fixedly connected to a third sealing gasket, and the size of the third sealing gasket is sufficient to completely seal the second balance port.

6. The electromagnetic valve according to claim 1, wherein The electromagnetic drive includes a coil connected to the top of the valve cover, an adjustment cavity is provided in the middle of the coil, a stationary iron core is fixedly connected to the upper part of the adjustment cavity, an armature connected to the control rod is slidably connected to the lower part of the adjustment cavity, and a spring is fixedly connected between the stationary iron core and the armature.

7. The electromagnetic valve according to claim 6, wherein It also includes fastening components for securing the armature to the control lever.

8. The electromagnetic valve according to claim 7, wherein The fastening assembly includes a recess, two screw holes, two insertion holes, and two bolts. The recess is located at the lower part of the armature for the other end of the control rod to be inserted. The two screw holes are located on both sides of the armature and are connected to the recess. The two insertion holes are located on both sides of the other end of the control rod. When the other end of the control rod is fully inserted into the recess, the two insertion holes correspond to the two screw holes. Tightening the two bolts allows them to pass through the two screw holes and be inserted into the corresponding insertion holes, thereby fixing the armature to the control rod.

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