Electromagnetic valve with adjustable flow

Abstract

The utility model provides an electromagnetic valve with adjustable flow, which comprises a valve body, a flow passage is arranged in the valve body, a connecting seat is arranged on the valve body, a cavity is formed on the connecting seat, the cavity is communicated with the flow passage, a blocking structure is arranged in the valve body and divides the flow passage into a left half flow passage and a right half flow passage, and the left half flow passage is communicated with the right half flow passage. The part, located in the cavity, of the blocking structure is of a hollow cylinder structure to form an overflowing hole, a plurality of flow limiting holes are formed in the inner wall, close to the right half overflowing channel, of the overflowing hole, and the two ends of each flow limiting hole communicate with the overflowing hole and the right half overflowing channel correspondingly. The shell is connected with the connecting seat; the valve rod assembly is arranged in the shell and comprises a hollow guide column, a movable iron core is arranged in the hollow guide column, a coil is arranged on the periphery of the movable iron core, a valve rod is connected to the movable iron core, the first end of the valve rod penetrates through the bottom of the shell and extends into the overflowing hole, and the first end of the valve rod can block or avoid a flow limiting hole in the overflowing hole. The electromagnetic valve can realize flow adjustment, and the adjustment is simple.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic valves, in particular to an electromagnetic valve with adjustable flow. Background Art

[0002] Solenoid valves are common and important components in automated control systems. Through solenoid valves, the flow direction and flow rate of the fluid in the system can be controlled, thereby achieving system control. The solenoid valve is an actuator that generates magnetic attraction after the electromagnetic coil is energized to overcome the pressure of the spring to drive the valve core to move, thereby achieving on-off control of the fluid channel. At present, conventional solenoid valves can usually only achieve conventional conduction and shutdown, and cannot achieve the adjustment of the fluid flow rate. Although high-end solenoid valves have flow regulation functions, their structures are relatively complex, the cost is high, and they are not universally applicable. Utility Model Content

[0003] In view of this, the utility model provides a flow-adjustable solenoid valve, which is used to solve the problem that the solenoid valve in the prior art is difficult to adjust the flow size and the structure of the solenoid valve with flow adjustment function is too complicated.

[0004] In order to solve the above technical problems, the utility model provides a solenoid valve with adjustable flow, comprising:

[0005] A valve body, wherein a flow passage is provided in the valve body, a connecting seat is fixedly provided on the valve body, a cavity is formed inside the connecting seat, the cavity is communicated with the flow passage, a blocking structure is further provided in the valve body, the blocking structure divides the flow passage into a left half flow passage and a right half flow passage, the portion of the blocking structure located in the cavity is configured as a hollow cylindrical structure to form a flow hole, a plurality of flow limiting holes are provided on the inner wall of the flow hole close to the right half flow passage, and two ends of the flow limiting hole are respectively communicated with the flow hole and the right half flow passage;

[0006] A shell, wherein the shell is fixedly connected to the connecting seat;

[0007] A valve stem assembly, wherein the valve stem assembly is arranged in the shell, and the valve stem assembly includes a hollow guide column, a movable iron core is arranged in the hollow guide column, a coil is arranged on the outer periphery of the movable iron core, and the coil can drive the movable iron core to perform linear motion in the hollow guide column. A valve stem is fixedly connected to the movable iron core, and the first end of the valve stem passes through the bottom of the shell and extends into the flow hole. The first end of the valve stem can block or avoid at least part of the flow limiting hole in the flow hole.

[0008] In some embodiments, optionally, the solenoid valve further comprises:

[0009] An adjusting component, wherein the adjusting component includes an adjusting rod, the first end of the adjusting rod is arranged outside the shell, and the first end of the adjusting rod is provided with a rotating block, the second end of the adjusting rod extends into the shell and is inserted into the hollow guide column, the inner wall of the hollow guide column is provided with an internal thread, and the part of the adjusting rod extending into the hollow guide column is provided with an external thread adapted to the internal thread. By adjusting the length of the adjusting rod extending into the hollow guide column, the movable range of the movable iron core in the hollow guide column can be changed, thereby changing the number of the limiting holes blocked or avoided by the first end of the valve stem.

[0010] In some embodiments, optionally, the adjusting rod is provided with a plurality of scale lines spaced apart along the axial direction of the adjusting rod, and the number of scale lines on the portion of the adjusting rod extending out of the shell corresponds to the movable range of the movable iron core in the hollow guide column.

[0011] In some embodiments, optionally, the first end of the valve stem is formed as a stopper matched with the inner diameter of the flow hole, and the valve stem assembly further includes a first seal, which is arranged on a side of the stopper close to the movable iron core.

[0012] In some embodiments, optionally, the valve stem assembly further comprises an elastic member, wherein the elastic member is sleeved on the outer circumference of the valve stem, one end of the elastic member abuts against the sealing member, and the other end of the elastic member abuts against the housing.

[0013] In some embodiments, optionally, the solenoid valve also includes a guide sleeve; the guide sleeve is in the shape of a hollow cylinder, the guide sleeve is arranged in the valve body and directly opposite the valve stem, a guide column is arranged on the side of the stop block away from the movable iron core, and the guide column can be slidably inserted in the guide sleeve.

[0014] In some embodiments, optionally, a second sealing member is pressed between the shell and the connecting seat.

[0015] In some embodiments, optionally, the shell and the connecting seat are connected by bolts.

[0016] In some embodiments, optionally, a buffer limiter is disposed in the hollow guide column, the buffer limiter is arranged around the outer circumference of the valve stem, and the buffer limiter is arranged between the movable iron core and the bottom surface of the hollow guide column.

[0017] In some embodiments, optionally, the elastic member is a spring; and / or the first sealing member is a sealing gasket.

[0018] The beneficial effects of the above technical solution of the utility model are as follows:

[0019] In the present application, the flow channel in the valve body is divided into a left half flow channel and a right half flow channel by the blocking structure, and the part of the blocking structure located in the cavity is set as a hollow cylindrical structure to form a flow hole, and then a plurality of flow limiting holes are opened on the inner wall of the flow hole close to the right half flow channel, and the two ends of the flow limiting hole are respectively connected to the flow hole and the right half flow channel, and the first end of the valve stem in the valve stem assembly extends into the flow hole. Therefore, the movement position of the movable iron core can be changed by controlling the current passed through the coil in the valve stem assembly, and then the number of flow limiting holes in the flow hole blocked or avoided by the first end of the valve stem fixedly connected to the movable iron core can be changed, so as to finally realize the adjustment of the flow rate passing through the solenoid valve, and the adjustment method is simple, the structure is simple, and the implementation cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the solenoid valve in the embodiment of the utility model;

[0021] Figure 2 It is a schematic diagram of a flow limiting hole opened on the inner wall of the flow hole in an embodiment of the utility model. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0023] The solenoid valve is an actuator that generates magnetic attraction to overcome the pressure of the spring when the electromagnetic coil is energized, driving the valve core to move, and then realizing the switch control of the fluid channel. At present, conventional solenoid valves can usually only realize conventional conduction and shutdown, and cannot adjust the fluid flow rate. Although high-end solenoid valves have flow regulation functions, their structures are relatively complex, the cost is high, and they are not universally applicable.

[0024] Therefore, please refer to Figure 1 and Figure 2 The embodiment of the present application provides a flow-adjustable solenoid valve, which includes: a valve body 100, a shell 107 and a valve stem assembly; wherein, a flow passage is opened in the valve body 100, and the flow passage runs through the left and right sides of the valve body 100, and the left and right sides of the valve body 100 are respectively used to connect the pipe body, and a connecting seat 106 is fixedly provided on the valve body 100, and the connecting seat 106 is sealed and fixedly connected to the valve body 100; a cavity is formed inside the connecting seat 106, and the cavity is connected with the flow passage as a whole.

[0025] A blocking structure 101 is also provided in the valve body 100, and the blocking structure 101 divides the flow channel into a left half flow channel 102 and a right half flow channel 103. That is to say, the blocking structure 101 is arranged in the flow channel to separate the flow channel; wherein, the part of the blocking structure 101 located in the cavity is arranged as a hollow cylindrical structure to form a flow hole 104, and the flow hole 104 is connected to the left half flow channel 102. A plurality of flow limiting holes 105 are provided on the inner wall of the flow hole 104 near the right half flow channel 103, and the two ends of each flow limiting hole 105 are respectively connected to the flow hole 104 and the right half flow channel 103. That is to say, the left half flow channel 102 is first connected to the flow hole 104, and then the flow hole 104 is connected to each flow limiting hole 105, and each flow limiting hole 105 is connected to the right half flow channel 103, thereby realizing the conduction between the left half flow channel 102 and the right half flow channel 103.

[0026] In this embodiment, the housing 107 is fixedly connected to the connection seat 106. Generally speaking, the connection seat 106 can be integrally formed with the valve body 100. The function of the connection seat 106 is to connect the housing 107 and other components. The valve stem assembly is arranged in the housing 107. The valve stem assembly includes a hollow guide column 108. The hollow guide column 108 is hollow inside. A movable iron core 109 is arranged in the hollow guide column 108. The movable iron core 109 can slide linearly along its axial direction in the hollow guide column 108. In some embodiments, optionally, the hollow guide column 108 can be integrally formed with the bottom of the housing 107.

[0027] In this embodiment, a coil 110 is disposed on the outer periphery of the movable iron core 109, more specifically, a coil 110 is disposed on the outer periphery of the hollow guide column 108, and the coil 110 can drive the movable iron core 109 to perform linear motion in the hollow guide column 108. A valve stem 111 is fixedly connected to the movable iron core 109, and the second end of the valve stem 111 is fixedly connected to the movable iron core 109, and the first end of the valve stem 111 penetrates the bottom of the housing 107 and extends into the flow hole 104, wherein the valve stem 111 and the bottom of the housing 107 are sealed and relatively slidably arranged; after the first end of the valve stem 111 extends into the flow hole 104, when the movable iron core 109 is driven by the coil 110, the valve stem 111 fixedly connected to the movable iron core 109 will also be driven to move along the axial direction of the flow hole 104, thereby blocking or avoiding at least part of the flow limiting hole 105 in the flow hole 104. By adjusting the magnitude of the current passed through the coil 110, the moving position of the movable iron core 109 can be adjusted, and then the position of the valve stem 111 can be adjusted. When the force applied to the valve stem 111 (including the downward thrust applied by the movable iron core 109 and the upward thrust applied by the fluid) is balanced, the number of flow limiting holes 105 in the flow hole 104 that are blocked or avoided by the valve stem 111 can be adjusted. For example, when the current applied in the coil 110 is small, the distance that the valve stem 111 moves downward is short. At this time, the number of blocked flow limiting holes 105 is small, and the flow rate of the fluid flowing from the flow hole 104 to the right half of the flow channel 103 through the flow limiting holes 105 will be large; and when the current applied in the coil 110 is large, the distance that the valve stem 111 moves downward is long. At this time, the number of blocked flow limiting holes 105 is large, and the flow rate of the fluid flowing from the flow hole 104 to the right half of the flow channel 103 through the flow limiting holes 105 will decrease.

[0028] Therefore, in the present application, the flow passage in the valve body 100 is divided into a left half flow passage 102 and a right half flow passage 103 by the blocking structure 101, and the portion of the blocking structure 101 located in the cavity is set as a hollow cylindrical structure to form a flow hole 104, and then a plurality of flow limiting holes 105 are opened on the inner wall of the flow hole 104 close to the right half flow passage 103, and the two ends of the flow limiting holes 105 are respectively connected to the flow hole 104 and the right half flow passage 103, The first end of the valve stem 111 in the valve stem assembly extends into the flow hole 104, so that the movement position of the movable iron core 109 can be changed by controlling the current passed through the coil 110 in the valve stem assembly, and then the number of flow limiting holes 105 in the flow hole 104 blocked or avoided by the first end of the valve stem 111 fixedly connected to the movable iron core 109 can be changed, thereby finally realizing the adjustment of the flow rate flowing through the solenoid valve, and the adjustment method is simple, the structure is simple, and the implementation cost is low.

[0029] In some embodiments of the present application, the solenoid valve also includes an adjusting component, which includes an adjusting rod 112, the first end of the adjusting rod 112 is arranged outside the shell 107, and the first end of the adjusting rod 112 is provided with a rotating block 1121, the second end of the adjusting rod 112 extends into the shell 107 and is inserted into the hollow guide column 108, the inner wall of the hollow guide column 108 is provided with an internal thread, and the part of the adjusting rod 112 extending into the hollow guide column 108 is provided with an external thread compatible with the internal thread, and by adjusting the length of the adjusting rod 112 extending into the hollow guide column 108, the movable range of the movable iron core 109 in the hollow guide column 108 can be changed, thereby changing the number of the flow limiting holes 105 blocked or avoided by the first end of the valve stem 111. By providing a rotating block 1121 at the first end of the adjusting rod 112, it is convenient for a person to hold the rotating block 1121 outside the housing 107 to rotate, thereby changing the length of the adjusting rod 112 extending into the hollow guide column 108. In addition, the portion of the adjusting rod 112 extending into the hollow guide column 108 is provided with an external thread, and the inner wall surface of the hollow guide column 108 is also provided with a corresponding internal thread, which makes it easier to adjust the adjusting rod 112, and the adjustment accuracy is higher, and it is easier for a person to adjust the length of the adjusting rod 112 extending into the hollow guide column 108 to any value.

[0030] Therefore, when it is necessary to increase the flow rate of the solenoid valve, the adjusting rod 112 can be rotated by the rotating block 1121 to shorten the length of the adjusting rod 112 extending into the hollow guide column 108, thereby making the movable range of the movable iron core 109 further away from the flow hole 104. The depth of the first end of the valve stem 111 connected to the movable iron core 109 extending into the flow hole 104 becomes shallower, and the number of the limiting holes 105 in the blocked flow hole 104 becomes less, and the flow rate of the fluid flowing from the flow hole 104 through the limiting holes 105 to the right half of the flow channel 103 will become larger. When the flow rate of the solenoid valve needs to be reduced, the adjusting rod 112 can be rotated by the rotating block 1121 to lengthen the length of the adjusting rod 112 inserted into the hollow guide column 108, thereby making the movable range of the movable iron core 109 closer to the flow hole 104. The depth of the first end of the valve stem 111 connected to the movable iron core 109 inserted into the flow hole 104 becomes deeper, and the number of the limiting holes 105 in the blocked flow hole 104 increases, and the flow rate of the fluid flowing from the flow hole 104 through the limiting holes 105 to the right half of the flow channel 103 will become smaller.

[0031] In this embodiment, since the limiting of the adjusting rod 112 is mechanical limiting, the limiting strength is high, and the stability of the flow regulation can be achieved.

[0032] In some embodiments of the present application, the adjusting rod 112 is provided with a plurality of scale lines spaced apart along the axial direction of the adjusting rod 112, and the number of scale lines on the portion of the adjusting rod 112 extending out of the housing 107 corresponds to the range of motion of the movable iron core 109 in the hollow guide column 108. Thus, by observing the scale lines on the adjusting rod 112 that leak out of the housing 107, the size of the corresponding flow rate can be known, so that the operator can conveniently adjust the flow rate to the desired size.

[0033] In some embodiments of the present application, the first end of the valve stem 111 is formed as a stopper 1111 that matches the inner diameter of the flow hole 104, and the valve stem assembly further includes a first sealing member 114, which is disposed on a side of the stopper 1111 close to the movable iron core. The shape of the stopper 1111 matches the inner diameter of the flow hole 104, and the flow hole 104 can be effectively blocked, and the first sealing member 114 is disposed on a side of the stopper 1111 close to the movable iron core, and the flow hole 104 can be further sealed by the first sealing member 114 to prevent fluid leakage.

[0034] In some embodiments of the present application, the valve stem assembly further includes an elastic member 115, which is sleeved on the outer periphery of the valve stem 111, one end of the elastic member 115 abuts against the sealing member, and the other end of the elastic member 115 abuts against the housing 107. The elastic member 115 can release elastic potential energy after the coil 110 loses power, squeeze the valve stem 111 to move downward, and completely block the flow hole 104.

[0035] In some other embodiments of the present application, the solenoid valve further includes a guide sleeve 116, which is in the shape of a hollow cylinder. The guide sleeve 116 is disposed in the valve body 100 and is directly opposite to the valve stem 111. A guide column 117 is disposed on the side of the stopper 1111 away from the movable iron core, and the guide column 117 is slidably inserted in the guide sleeve 116. By disposing a columnar guide column 117 on the side of the stopper 1111 away from the movable iron core, the guide column 117 can be slidably inserted in the guide sleeve 116, so that when the valve stem 111 moves in the flow hole 104, the guide column 117 also slides in the guide sleeve 116, so that the valve stem 111 always maintains a linear motion during the movement, reducing the excessive wear of the first sealing member 114, the stopper 1111 and other components on the valve stem 111 due to the deviation of the valve stem 111, and ensuring the sealing effect of the solenoid valve.

[0036] In some embodiments of the present application, a second sealing member 118 is pressed between the housing 107 and the connecting seat 106. Exemplarily, the second sealing member 118 may be a sealing ring. By providing the second sealing member 118 between the two, leakage of the fluid in the valve body 100 can be avoided.

[0037] In some embodiments, the housing 107 and the connection seat 106 may be connected by bolts. The bolt connection method can facilitate the disassembly and assembly between the two, so as to perform maintenance and replacement of the valve stem assembly in the housing 107.

[0038] In some other embodiments of the present application, a buffer stopper 119 is provided in the hollow guide column 108, and the buffer stopper 119 is arranged around the outer periphery of the valve stem 111, and the buffer stopper 119 is arranged between the movable iron core and the bottom surface of the hollow guide column 108. The buffer stopper 119 can buffer the impact force of the movable iron core, weaken the impact between the movable iron core and the bottom surface of the hollow guide column 108, and then reduce the damage to the movable iron core caused by the impact. Optionally, the buffer stopper 119 can be made of plastic or other materials.

[0039] In some embodiments of the present application, the elastic member 115 is optionally a spring or other component. In some embodiments, the first sealing member 114 is a sealing gasket, which can provide a good sealing effect to ensure the sealing effect of the flow hole 104.

[0040] In summary, in the embodiment of the present application, the flow channel in the valve body is divided into a left half flow channel and a right half flow channel by the blocking structure, and the part of the blocking structure located in the cavity is set as a hollow cylindrical structure to form a flow hole, and then a plurality of flow limiting holes are opened on the inner wall of the flow hole close to the right half flow channel, and the two ends of the flow limiting hole are respectively connected to the flow hole and the right half flow channel, and the first end of the valve stem in the valve stem assembly extends into the flow hole, so that the movement position of the movable iron core can be changed by controlling the current passed through the coil in the valve stem assembly, and then the number of flow limiting holes in the flow hole blocked or avoided by the first end of the valve stem fixedly connected to the movable iron core can be changed, so as to finally realize the adjustment of the flow rate passing through the solenoid valve, and the adjustment method is simple, the structure is simple, and the implementation cost is low.

[0041] Unless otherwise defined, the technical or scientific terms used herein shall have the usual meanings understood by persons of ordinary skill in the field to which the utility model belongs. The words "first", "second" and similar words used in the patent application specification and claims of the utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate quantity restrictions, but indicate the existence of at least one. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship also changes accordingly.

[0042] The above is a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A flow-adjustable solenoid valve, characterized in that: include: A valve body, wherein a flow passage is provided in the valve body, a connecting seat is fixedly provided on the valve body, a cavity is formed inside the connecting seat, the cavity is communicated with the flow passage, a blocking structure is further provided in the valve body, the blocking structure divides the flow passage into a left half flow passage and a right half flow passage, the portion of the blocking structure located in the cavity is configured as a hollow cylindrical structure to form a flow hole, a plurality of flow limiting holes are provided on the inner wall of the flow hole close to the right half flow passage, and two ends of the flow limiting hole are respectively communicated with the flow hole and the right half flow passage; A shell, wherein the shell is fixedly connected to the connecting seat; A valve stem assembly, wherein the valve stem assembly is arranged in the shell, and the valve stem assembly includes a hollow guide column, a movable iron core is arranged in the hollow guide column, a coil is arranged on the outer periphery of the movable iron core, and the coil can drive the movable iron core to perform linear motion in the hollow guide column. A valve stem is fixedly connected to the movable iron core, and the first end of the valve stem passes through the bottom of the shell and extends into the flow hole. The first end of the valve stem can block or avoid at least part of the flow limiting hole in the flow hole.

2. The flow-adjustable solenoid valve according to claim 1, characterized in that: The solenoid valve further comprises: An adjusting component, wherein the adjusting component includes an adjusting rod, the first end of the adjusting rod is arranged outside the shell, and the first end of the adjusting rod is provided with a rotating block, the second end of the adjusting rod extends into the shell and is inserted into the hollow guide column, the inner wall of the hollow guide column is provided with an internal thread, and the part of the adjusting rod extending into the hollow guide column is provided with an external thread adapted to the internal thread. By adjusting the length of the adjusting rod extending into the hollow guide column, the movable range of the movable iron core in the hollow guide column can be changed, thereby changing the number of the limiting holes blocked or avoided by the first end of the valve stem.

3. The flow-adjustable solenoid valve according to claim 2, characterized in that: The adjusting rod is provided with a plurality of scale lines spaced apart along the axial direction of the adjusting rod, and the number of scale lines on the portion of the adjusting rod extending out of the housing corresponds to the movable range of the movable iron core in the hollow guide column.

4. The flow-adjustable solenoid valve according to claim 1, characterized in that: The first end of the valve stem is formed as a stopper matched with the inner diameter of the flow hole, and the valve stem assembly further comprises a first sealing member, which is arranged on a side of the stopper close to the movable iron core.

5. The flow-adjustable solenoid valve according to claim 4, characterized in that: The valve stem assembly further comprises an elastic member, which is sleeved on the outer circumference of the valve stem, one end of the elastic member abuts against the sealing member, and the other end of the elastic member abuts against the housing.

6. The flow-adjustable solenoid valve according to claim 4, characterized in that: The solenoid valve also includes a guide sleeve, which is in the shape of a hollow cylinder. The guide sleeve is arranged in the valve body and directly faces the valve stem. A guide column is arranged on the side of the stop block away from the movable iron core, and the guide column can be slidably inserted in the guide sleeve.

7. The flow-adjustable solenoid valve according to claim 1, characterized in that: A second sealing member is pressed between the shell and the connecting seat.

8. The flow-adjustable solenoid valve according to claim 1, characterized in that: The shell and the connecting seat are connected via bolts.

9. The flow-adjustable solenoid valve according to claim 1, characterized in that: A buffer stopper is arranged in the hollow guide column. The buffer stopper is arranged around the outer circumference of the valve stem and is arranged between the movable iron core and the bottom surface of the hollow guide column.

10. The flow-adjustable solenoid valve according to claim 5, characterized in that: The elastic member is a spring; and / or the first sealing member is a sealing gasket.

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