Balanced high speed solenoid valve

Abstract

The present invention discloses a balanced high-speed solenoid valve, which comprises: an actuator connected to a valve body, and a balanced diaphragm clamped between the actuator and the valve body, a sliding shaft passage in the valve body, and an inner sliding shaft and an adjustable outer sliding shaft are arranged in the sliding shaft passage, an upper top abutment surface and a lower top abutment surface are arranged in the center of the inner sliding shaft, and an inner sliding shaft fixing part cooperates with the lower part of the inner sliding shaft to be connected to the inside of the adjustable outer sliding shaft, so that the pressure balance and stability of the fluid can be maintained during exhaust, and the elastic force of the spring and the displacement of the lower top abutment surface can be changed by adjusting the displacement distance of the adjustable outer sliding shaft, and the balanced diaphragm with different thicknesses can be replaced to enable the balanced diaphragm to drive the inner sliding shaft to perform high-speed reciprocating movement.

Description

Technical Field

[0001] The invention relates to the technical field of electromagnetic valves, in particular to the structure of a balanced high-speed electromagnetic valve. Background Art

[0002] The solenoid valves currently on the market have improved a lot in terms of technical structure. The overall valve seat volume size, which was originally limited by the specific structural design, has also been improved. Such valve bodies can usually operate at a faster motion cycle, and therefore there are many related technologies that can be improved for this purpose.

[0003] Please refer to Taiwan Patent No. 1277698 "Directly operated pneumatic valve with differential auxiliary recovery", wherein the fluid control valve has a valve body with a fluid inlet and a discharge port, the flow channel extending axially in the valve body and the inlet communicate with the discharge port, the valve member disposed in the flow channel can guide the fluid from the inlet to the discharge port, the valve member has a first valve head and a second valve head designed with different diameters, which can engage the first sealing diameter and the second sealing diameter in the channel, and the valve seat member in contact with the first valve head and the second sealing diameter generates a net recovery force, which can guide the valve member in a second direction opposite to the first direction when the force of the valve actuator is removed. Therefore, it can be understood that when the valve actuator stops operating, the valve assembly can form a pressure balance state, which means that the valve actuator needs to trigger the valve member to accelerate the displacement through force; and when the valve actuator is operating, unbalanced pressure will be generated, and different valve members in the channel need to be coordinated to achieve the acceleration of the valve member, so that the valve assembly no longer needs a bypass port to reduce the overall cost, and can achieve the purpose of accelerating the displacement of the valve.

[0004] However, when the open end of the aforementioned structure passes through the air pressure source, when the air pressure source passes through the valve equalization channel, it is also easy to cause high noise to be generated, and the internal valve components also cause some instability due to rapid displacement. Therefore, there is still room for further improvement.

[0005] Please refer to Taiwan Patent No. 1240050 "Directly-actuated pneumatic valve with air-assisted return stroke", in which the actuating valve assembly includes a valve body having a pressurized air supply inlet port connected to a pressurized air source, and at least a single cylindrical port. The valve body also has an axially extending valve through-hole and a valve member supported in the valve through-hole to move between predetermined positions, and pressurized air is selectively guided from the inlet port to flow through the cylindrical port. An actuator is installed in the valve body to move the valve member in a first direction, and a biasing member is arranged between the valve member and the valve body to provide a biasing force to the valve member in the opposite direction. At the same time, an air-assisted passage providing a pneumatic pressure source is contained therein, which is combined with the biasing member and actuated together to operatively move the valve member in a direction opposite to the movement caused by the actuator. The above-mentioned structure can actuate the valve more quickly through air assistance, and the valve assembly can include a smaller biasing member, and can also provide a smaller force to move the valve member more quickly. If the solenoid valve assembly is disabled, the valve member can be quickly and effectively moved away from the second or enabled position, especially the air-assisted passage can also provide the necessary mechanical driving force to assist in moving the valve member to the disabled position.

[0006] However, the air-assist passage in the aforementioned structure is connected to the outflow port, and although it is actuated in conjunction with the biasing member, when the valve member is displaced, the relevant air source flows through the valve assembly to the air-assist passage and the outflow port, which will cause the valve assembly to be affected by the dispersed discharge of the air source, making it impossible for the valve member to recover quickly even with the elastic force of the spring, so there is a disadvantage that the elastic recovery needs to be improved. Summary of the invention

[0007] The purpose of the present invention is to provide a balanced high-speed solenoid valve, which mainly utilizes the sliding shaft passage inside the valve body, and sets an inner sliding shaft and an adjustable outer sliding shaft, and cooperates with the balance diaphragm and actuator connection set above the valve body, so that the upper top abutment surface and the lower top abutment surface set by the inner sliding shaft can further cooperate with the pressure source passing through the sliding shaft passage to drive the inner sliding shaft to perform corresponding displacement actions, and utilizes the adjustable outer sliding shaft set on the outside of the inner sliding shaft to adjust the displacement distance of the lower top abutment surface, which can change the elastic force of the spring and the displacement of the lower top abutment surface, and cooperates with the replacement of balance diaphragms of different thicknesses to enable the inner sliding shaft to be adjusted at high speed.

[0008] In order to solve the above problems and achieve the purpose of the present invention, the technical means of the present invention is a balanced high-speed solenoid valve, an actuator has a coil composed of a movable iron and a fixed iron, and a push rod is provided below the coil to pass through the fixed iron; a valve body has a sliding shaft passage inside, an inner sliding shaft and an adjustable outer sliding shaft are arranged in the sliding shaft passage, a balancing diaphragm is provided above the valve body, and is connected with the actuator to allow the push rod to press against the balancing diaphragm, an upper pressing surface and a lower pressing surface are provided in the center of the inner sliding shaft, and an inner sliding shaft fixing piece cooperates with the lower connection of the inner sliding shaft Connected to the inside of the adjustable outer sliding shaft, when the pressure source passes through the sliding shaft passage to the upper top abutment surface to push the inner sliding shaft downward, the pressure source can be discharged through an air outlet located in the sliding shaft passage, and the lower top abutment surface abuts the adjustable outer sliding shaft to close the exhaust port. When the pressure source weakens, the elastic force of a spring connected below the inner sliding shaft will generate thrust, allowing the air outlet to flow through the exhaust port, and adjusting the displacement distance by the adjustable outer sliding shaft to change the elastic force of the spring and the displacement of the lower top abutment surface, so that the inner sliding shaft can perform high-speed reciprocating motion.

[0009] The second purpose of the present invention is that the balancing diaphragm can cooperate with the adjustable outer sliding shaft to adjust the displacement distance, and the balancing diaphragm can be replaced with different thicknesses.

[0010] The third object of the present invention is that the displacement distance of the outer sliding shaft is adjusted to be between 0.01 cm and 0.03 cm.

[0011] According to the fourth object of the present invention, the thickness of the balancing diaphragm is between 0.015 cm and 0.035 cm.

[0012] The balanced high-speed solenoid valve of the present invention can stop generating sharp noise when the pressure source flows through the internal sliding shaft channel of the valve body through the upper top abutment surface and the lower top abutment surface in the center of the inner sliding shaft, in cooperation with the inner sliding shaft fixing piece and the adjustable outer sliding shaft. Moreover, by coordinating the mutual adjustment of the balancing diaphragm and the adjustable outer sliding shaft, when the inner sliding shaft is displaced, the elastic force recovery of the spring is not affected by the relevant pressure, so that the inner sliding shaft can be smoothly adjusted at high speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic diagram of the present invention;

[0014] Figure 2 The present invention Figure 1 A partial enlarged view of

[0015] Figure 3 The present invention Figure 2 Schematic diagram of the displacement of the inner sliding shaft;

[0016] Figure 4 is a schematic diagram of another embodiment of the present invention.

[0017] Description of reference numerals:

[0018] (10)...Actuator

[0019] (11)...Coil

[0020] (111)...Movable iron

[0021] (112)...Fixed iron

[0022] (1121)...Putter

[0023] (20)...Valve body

[0024] (21)...Balanced diaphragm

[0025] (22)...Sliding shaft passage

[0026] (221)...Inner sliding shaft

[0027] (2211)...Upper top surface

[0028] (2212)...lower top surface

[0029] (2213)...Spring

[0030] (2214)...Inner slide shaft fixing

[0031] (222)...Adjustable external slide shaft

[0032] (A)...Air outlet

[0033] (P)...pressure source

[0034] (R)...Exhaust port

[0035] (X)...Displacement distance

[0036] (Y)...Gap. DETAILED DESCRIPTION

[0037] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, but should not be construed as limiting the present invention.

[0038] The present invention is a balanced high-speed solenoid valve. Figure 1As shown, the structure includes: an actuator 10, wherein a movable iron 111 is provided at the upper part thereof, and a fixed iron 112 is provided at the lower part thereof, the movable iron 111 and the fixed iron 111 can form a coil 11, and a push rod 1121 is provided below the coil 11 and penetrates the fixed iron 112, wherein there is a gap Y between the movable iron 111 and the fixed iron 111, and the length of the gap Y can be changed by the length of the push rod 1121.

[0039] A valve body 20 has a sliding shaft passage 22 inside. The sliding shaft passage 22 is axially arranged, and an inner sliding shaft 221 and an adjustable outer sliding shaft 222 are further arranged inside the sliding shaft passage 22. A balancing diaphragm 21 is provided above the valve body 20 to cooperate with the actuator 10, so that the valve body 20 is connected to the actuator 10, so that the aforementioned push rod 1121 presses against the balancing diaphragm 21.

[0040] The center of the inner sliding shaft 221 is slightly protruding from the diameter of the inner sliding shaft 221 , and is provided with an upper abutment surface 2211 and a lower abutment surface 2212 . An inner sliding shaft fixing member 2214 cooperates with the lower side of the inner sliding shaft 221 to be connected to the inside of the adjustable outer sliding shaft 222 .

[0041] Please refer to Figure 2-3 As shown, when a pressure source P passes through the sliding shaft passage 22 to the upper top surface 2211 to push the inner sliding shaft 221 downward, the pressure source P can be discharged through an outlet A located in the sliding shaft passage 22, and the lower top surface 2212 presses against the adjustable outer sliding shaft 222 to make an exhaust port R closed; and when the pressure source P is weakened, the elastic force of a spring 2213 connected below the inner sliding shaft 221 will generate a thrust, so that the outlet A flows into the exhaust port R.

[0042] By adjusting the displacement distance X through the adjustable outer sliding shaft 222, the displacement distance X ranges from 0.01 cm to 0.03 cm, which can further change the elastic force of the spring 2213 and the displacement of the lower top surface 2212. In more detail, the pressure source P corresponds to the contact area and travel direction of the upper top surface 2211 of the inner sliding shaft 221, which is a downward force; and the spring 2213 corresponds to the contact area and travel direction of the lower top surface 2212 of the inner sliding shaft 221, which is an upward force. Since the contact areas are equal, the downward force is equal to the upward force. When the air outlet A of the inner sliding shaft 221 is exhausted through the exhaust port R, the inner sliding shaft 221 constitutes a reset action without differential pressure assistance. In other words, when the thrust of the push rod 1121 stops, it does not affect the spring 2213 pushing the upper top surface 2211 to close the air outlet A, which is the balanced structure advocated in this case. In addition to making the reaction time of the inner sliding shaft 221 when it is displaced faster, the balancing diaphragm 21 can be replaced with different thicknesses. The thicker the thickness, the smaller the tension, and the thinner the thickness, the greater the tension. Therefore, the purpose of adjusting tensions of different sizes can be achieved, so that the push rod 1121 in the actuator 10 and the inner sliding shaft 221 in the valve body 20 can reduce or increase the moving distance when they move at high speed, so as to adjust their displacement. The thickness of the aforementioned balancing diaphragm 21 can be between 0.015 cm and 0.035 cm, and the aforementioned gap Y needs to be greater than the displacement distance X, so as to ensure the purpose of high-speed movement of the push rod 1121 and the inner sliding shaft 221.

[0043] Please refer to Figure 4 As shown, another embodiment of the balanced high-speed solenoid valve of the present invention, all its structural components are the same, only the balancing diaphragm 21 is removed and replaced with a piston and an O-ring, the inner sliding shaft fixing part 2214 of the inner sliding shaft 221 is removed, and the length of the adjustable outer sliding shaft 222 is lengthened, so that when the upper top abutment surface 2211 and the lower top abutment surface 2212 of the inner sliding shaft 221 perform a reset action without the assistance of differential pressure, the adjustment is carried out in conjunction with the adjustable outer sliding shaft 222. Since there is only one O-ring in this embodiment, the friction of the O-ring is not increased, and no resistance will be generated during high-speed movement.

[0044] In summary, the balanced high-speed solenoid valve of the present invention, through the sliding shaft passage 22 provided inside the valve body 20, through the inner sliding shaft 221 connected to the inner sliding shaft fixing member 2214 at the bottom and the adjustable outer sliding shaft 222 provided on the outer side of the inner sliding shaft fixing member 2214, further through the action of adjusting the displacement distance X and replacing the thickness of the balancing diaphragm 21, allows the inner sliding shaft 221 to achieve balance and high-speed actuation.

[0045] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings. The above is only a preferred embodiment of the present invention, but the present invention is not limited to the scope of implementation shown in the drawings. Any changes made according to the concept of the present invention, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the description and drawings, should be within the protection scope of the present invention.

Claims

1. A balanced high-speed solenoid valve, comprising: an actuator (10) having a coil (11) composed of a movable iron (111) and a fixed iron (112), and a push rod (1121) penetrating the fixed iron (112) is provided below the coil (11); a valve body (20) having a sliding shaft passage (22) inside, an inner sliding shaft (221) and an adjustable outer sliding shaft (222) provided inside the sliding shaft passage (22), a balanced diaphragm (21) is provided above the valve body (20), and is connected to the actuator (10) so that the push rod (1121) presses against the balanced diaphragm (21), characterized in that: The inner sliding shaft (221) is provided with an upper abutment surface (2211) and a lower abutment surface (2212) at the center thereof. An inner sliding shaft fixing member (2214) cooperates with the lower portion of the inner sliding shaft (221) to be connected to the inside of the adjustable outer sliding shaft (222). When a pressure source (P) passes through the sliding shaft passage (22) to the upper abutment surface (2211) to push the inner sliding shaft (221) to move downward, the pressure source (P) can be discharged through an air outlet (A) located in the sliding shaft passage (22), and the lower abutment surface (221 2) the adjustable outer sliding shaft (222) is pressed against the exhaust port (R) to close the exhaust port (R). When the thrust of the push rod (1121) is weakened, the elastic force of a spring (2213) connected below the inner sliding shaft (221) generates thrust, so that the air outlet (A) flows through the exhaust port (R). The displacement distance (X) of the adjustable outer sliding shaft (222) changes the elastic force of the spring (2213) and the displacement of the lower pressing surface (2212), so that the inner sliding shaft (221) can be adjusted at high speed.

2. The balanced high-speed solenoid valve according to claim 1, characterized in that: The balancing diaphragm (21) can cooperate with the adjustable outer sliding shaft (222) to adjust the displacement distance, and the balancing diaphragm (21) can be replaced with different thicknesses.

3. The balanced high-speed solenoid valve according to claim 1, characterized in that: The displacement distance of the adjustable outer sliding shaft (222) ranges from 0.01 cm to 0.03 cm.

4. The balanced high-speed solenoid valve according to claim 2, characterized in that: The thickness of the balancing diaphragm (21) is between 0.015 cm and 0.035 cm.

Images