Pole shoe adjustable solenoid core and proportional solenoid valve

Abstract

The present invention relates to the field of electromagnetic valve technology, and in particular to an adjustable pole shoe electromagnetic core and a proportional electromagnetic valve. The adjustable pole shoe electromagnetic core comprises a fixed iron core, a moving iron core, a pole shoe assembly and an adjustment assembly; the moving iron core is movably arranged on the bottom side of the fixed iron core along a first direction, and the pole shoe assembly is sleeved on the outside of the fixed iron core and the moving iron core; the adjustment assembly is connected to the pole shoe assembly to adjust the position of the pole shoe assembly along the first direction. The proportional electromagnetic valve comprises the adjustable pole shoe electromagnetic core. The adjustable pole shoe electromagnetic core and the proportional electromagnetic valve change the relative position relationship of the pole shoe assembly, the fixed iron core and the moving iron core through the adjustment assembly, so that the magnetic circuit morphology of the adjustable pole shoe electromagnetic core is changed, and the correlation characteristics between the output force or displacement and the input current are changed, so that the pole shoe assembly can be adjusted according to the supporting equipment and the on-site use conditions.

Description

Technical Field

[0001] The invention relates to the technical field of electromagnetic valves, and in particular to an electromagnetic iron core with adjustable pole shoes and a proportional electromagnetic valve. Background Art

[0002] The pole shoes of current proportional electromagnets are all non-adjustable fixed pole shoes. After the proportional electromagnet is manufactured, the position of the pole shoes is completely fixed, and the output characteristics are thus solidified.

[0003] Since the pole shoe position of the proportional solenoid is completely fixed after manufacturing, its output characteristics are thus solidified and cannot be adjusted according to the supporting equipment and on-site operating conditions. This limits its matching with the supporting equipment and operating conditions and restricts its use. Summary of the invention

[0004] The first purpose of the present invention is to provide an electromagnetic core with adjustable pole shoes, so as to solve the problem that the position of the electromagnetic pole shoes in the prior art is fixed, resulting in its output characteristics being solidified and unable to be adjusted according to the supporting equipment and on-site usage conditions.

[0005] The second object of the present invention is to provide a proportional solenoid valve to solve the problem that the position of the electromagnet pole shoe is fixed in the prior art to a certain extent, resulting in its output characteristics being solidified and unable to be adjusted according to the supporting equipment and on-site operating conditions.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] Based on the above first purpose, the present invention provides an adjustable pole shoe type electromagnetic core, comprising: a fixed iron core, a moving iron core, a pole shoe assembly and an adjustment assembly;

[0008] The moving iron core is movably arranged on the bottom side of the fixed iron core along a first direction, and the pole shoe assembly is sleeved on the outer sides of the fixed iron core and the moving iron core;

[0009] The adjusting assembly is connected to the pole shoe assembly to adjust the position of the pole shoe assembly along the first direction.

[0010] In any of the above technical solutions, optionally, the adjustment assembly includes a first adjustment structure and a second adjustment structure, and the pole shoe assembly includes a first pole shoe and a second pole shoe;

[0011] The first pole shoe is sleeved on the fixed iron core, and the second pole shoe is sleeved on the moving iron core;

[0012] The first adjustment structure is connected to the first pole shoe to adjust the position of the first pole shoe along the first direction; the second adjustment structure is connected to the second pole shoe to adjust the position of the second pole shoe along the first direction.

[0013] In any of the above technical solutions, optionally, the pole shoe adjustable electromagnetic core further includes a magnetic isolation sleeve;

[0014] The fixed iron core and the moving iron core are both arranged in the magnetic isolation sleeve.

[0015] In any of the above technical solutions, optionally, the first pole shoe includes a first cylindrical body, an annular flange portion connected to the top of the cylindrical body, and a first tapered removal portion provided on the bottom outer surface of the first cylindrical body;

[0016] The first cylindrical body is slidably mounted on the magnetic isolation sleeve corresponding to the fixed iron core.

[0017] In any of the above technical solutions, optionally, the second pole shoe includes a second cylindrical body and a second tapered removal portion provided on the top outer surface of the second cylindrical body;

[0018] The second cylindrical body is slidably mounted on the magnetic isolation sleeve corresponding to the moving iron core.

[0019] Based on the above second purpose, the proportional solenoid valve provided by the present invention includes the pole shoe adjustable electromagnetic core provided by any of the above technical solutions.

[0020] In any of the above technical solutions, optionally, the proportional solenoid valve further includes a housing, the pole shoe adjustable electromagnetic core is disposed in the housing, and the fixed core of the pole shoe adjustable electromagnetic core is relatively fixed to the housing.

[0021] In any of the above technical solutions, optionally, the first adjustment structure of the pole shoe adjustable electromagnetic core includes a first external thread provided on the outer surface of the first pole shoe and a first internal thread provided on the inner surface of the shell, and the first pole shoe and the shell are adjustably screwed together along a first direction through the first internal thread and the first external thread;

[0022] The second adjustment structure of the pole shoe adjustable electromagnetic core includes a second external thread arranged on the outer surface of the second pole shoe and a second internal thread arranged on the inner surface of the shell. The first pole shoe and the shell are adjustably screwed together along a first direction through the second internal thread and the second external thread.

[0023] In any of the above technical solutions, optionally, the length of the first internal thread along the first direction is smaller than the length of the first external thread along the first direction;

[0024] A length of the second internal thread along the first direction is smaller than a length of the second external thread along the first direction.

[0025] By adopting the above technical solution, the beneficial effects of the present invention are:

[0026] The pole shoe adjustable electromagnetic core provided by the present invention comprises a fixed iron core, a moving iron core, an adjustment component and a pole shoe component. The adjustment component can adjust the position of the pole shoe component along a first direction, change the relative position relationship of the pole shoe component, the fixed iron core and the moving iron core, thereby changing the magnetic circuit form of the pole shoe adjustable electromagnetic core, and changing the correlation characteristics between the output force or displacement and the input current, and then the pole shoe component can be adjusted according to the supporting equipment and the on-site use conditions, thereby expanding the scope of application.

[0027] The proportional solenoid valve provided by the present invention comprises the above-mentioned pole shoe adjustable electromagnetic core, and thus can achieve all the beneficial effects of the pole shoe adjustable electromagnetic core. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 This is a schematic diagram of the structure of the electromagnetic core with adjustable pole shoes provided in Embodiment 1 of the present invention.

[0030] Icons: 1-second pole shoe; 2-magnetic isolation sleeve; 3-housing; 4-adjusting spring; 5-cover plate; 6-first pole shoe; 7-upper cover; 8-push rod; 9-fixed iron core; 10-moving iron core; 11-electromagnetic coil; 12-first adjusting structure; 13-second adjusting structure. DETAILED DESCRIPTION

[0031] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Embodiment 1

[0035] See also Figure 1 As shown, this embodiment provides an electromagnetic core with adjustable pole shoes; Figure 1 The structural schematic diagram of the proportional solenoid valve provided in this embodiment uses a cross-sectional view to more clearly show the structure.

[0036] The pole shoe adjustable electromagnetic core provided in this embodiment is used for a proportional electromagnetic valve.

[0037] See also Figure 1 As shown, the pole shoe adjustable electromagnetic core provided in this embodiment includes: a fixed iron core 9, a moving iron core 10, a pole shoe assembly and an adjustment assembly.

[0038] The moving iron core 10 is movably arranged on the bottom side of the fixed iron core 9 along the first direction. When the electromagnetic coil 11 of the proportional solenoid valve is energized, the moving iron core 10 can move to the side where the fixed iron core 9 is located under the action of the electromagnetic field. The bottom side is one side of the fixed iron core 9 along the first direction, and the other side of the fixed iron core 9 along the first direction is the top side.

[0039] The pole shoe assembly is sleeved on the outside of the fixed iron core 9 and the moving iron core 10. The pole shoe assembly has the effect of making the electromagnet obtain a better linear distribution, and the relative position of the pole shoe assembly relative to the fixed iron core 9 and the moving iron core 10 affects the magnetic circuit shape of the pole shoe adjustable electromagnet core.

[0040] The adjusting component is connected to the pole shoe component to adjust the position of the pole shoe component along the first direction. That is to say, the position of the pole shoe component relative to the fixed iron core 9 and the moving iron core 10 can be adjusted through the adjusting component, so that the magnetic circuit shape can be changed, thereby changing the correlation characteristics between the force or displacement output by the pole shoe adjustable electromagnetic core and the input current.

[0041] The pole shoe adjustable electromagnetic core in this embodiment includes a fixed iron core 9, a moving iron core 10, an adjustment component and a pole shoe component. The adjustment component can adjust the position of the pole shoe component along the first direction, change the relative position relationship of the pole shoe component, the fixed iron core 9 and the moving iron core 10, so that the magnetic circuit shape of the pole shoe adjustable electromagnetic core can be changed, and the correlation characteristics between the output force or displacement and the input current are changed, and then the pole shoe component can be adjusted according to the supporting equipment and the on-site working conditions, thereby expanding the scope of application.

[0042] In an optional solution of this embodiment, the adjustment assembly includes a first adjustment structure 12 and a second adjustment structure 13 , and the pole shoe assembly includes a first pole shoe 6 and a second pole shoe 1 .

[0043] The first pole shoe 6 is sleeved on the fixed iron core 9 , and the second pole shoe 1 is sleeved on the moving iron core 10 , so that the influence range of the pole shoe assembly on the magnetic circuit radiates to where the fixed iron core 9 and the moving iron core 10 are located.

[0044] The first adjustment structure 12 is connected to the first pole shoe 6 to adjust the position of the first pole shoe 6 along the first direction; the second adjustment structure 13 is connected to the second pole shoe 1 to adjust the position of the second pole shoe 1 along the first direction. In one adjustment, the first adjustment structure 12 and the second adjustment structure 13 can be adjusted separately, or the first adjustment structure 12 and the second adjustment structure 13 can be adjusted in coordination. Therefore, not only the overall position of the pole shoe assembly can be adjusted, but also the shape of the pole shoe assembly can be adjusted.

[0045] In an optional solution of this embodiment, the pole shoe adjustable electromagnetic core further includes a magnetic isolation sleeve 2 ; the fixed iron core 9 and the moving iron core 10 are both arranged in the magnetic isolation sleeve 2 .

[0046] By providing the magnetic isolation sleeve 2 to provide fixed support for the fixed iron core 9 and the moving iron core 10 and to provide a guide for the moving iron core 10 to reciprocate in the first direction, magnetic leakage can be effectively prevented.

[0047] Optionally, the outer peripheral side walls of the moving iron core 10 are respectively fitted with the inner walls of the magnetic isolation sleeve 2 to improve the effect of preventing magnetic leakage and to improve the guiding effect.

[0048] In an optional scheme of the present embodiment, the first pole shoe 6 includes a first tubular body, an annular flange portion connected to the top of the tubular body, and a first conical removal portion arranged on the bottom outer surface of the first tubular body, wherein the material of the first pole shoe 6 is a magnetic conductive material, and the first conical removal portion is a key component of the first pole shoe 6 to ensure the linearization ability of the first pole shoe 6 for the electromagnetic field.

[0049] The first cylindrical body is slidably mounted on the magnetic isolation sleeve 2 corresponding to the fixed iron core 9, so that the magnetic isolation sleeve 2 provides a guide for the position adjustment of the first pole shoe 6 along the first direction.

[0050] In an optional solution of this embodiment, the second pole shoe 1 includes a second cylindrical body and a second conical removal portion arranged on the top outer surface of the second cylindrical body. The second pole shoe 1 is made of a magnetically conductive material, and the second conical removal portion is a key component of the second pole shoe 1, thereby ensuring the linearization capability of the second pole shoe 1 for the electromagnetic field.

[0051] The second cylindrical body is slidably mounted on the magnetic isolation sleeve 2 corresponding to the movable iron core 10 , so that the magnetic isolation sleeve 2 provides a guide for the position adjustment of the second pole shoe 1 along the first direction.

[0052] Embodiment 2

[0053] Embodiment 2 provides a proportional solenoid valve, which includes the pole shoe adjustable electromagnet core in Embodiment 1. The technical features of the pole shoe adjustable electromagnet core disclosed in Embodiment 1 are also applicable to this embodiment, and the technical features of the pole shoe adjustable electromagnet core disclosed in Embodiment 1 will not be described repeatedly.

[0054] Combination Figure 1 As shown, the proportional solenoid valve provided in this embodiment includes the pole shoe adjustable electromagnetic core provided in the first embodiment.

[0055] In an optional scheme of this embodiment, the proportional solenoid valve also includes a shell 3, the pole shoe adjustable electromagnetic core is arranged in the shell 3, and the relative position relationship between the fixed iron core 9 and the shell 3 is fixed, so that the shell 3 plays a role in protecting and installing the pole shoe adjustable electromagnetic core.

[0056] Specifically, the proportional solenoid valve further includes an electromagnetic coil 11 and an adjusting spring 4 disposed in the housing 3. The electromagnetic coil 11 is wound around the outside of the pole shoe adjustable electromagnetic core, and the electromagnetic coil 11 can be assembled on the outside of the pole shoe assembly through a coil bracket. The adjusting spring 4 is supported between the housing 3 and the top of the moving iron core 10 along a first direction.

[0057] Optionally, in order to improve the positioning effect of the electromagnetic coil 11 installation, the bottom of the electromagnetic coil 11 abuts against the shell of the shell 3, and the top of the electromagnetic coil 11 is pressed with a cover plate 5, which is annular and corresponds to the fixed iron core 9 and is sleeved on the outside of the first pole shoe 6.

[0058] The working principle of the proportional solenoid valve is as follows: the electromagnetic coil 11 will form a magnetic field inside the pole shoe adjustable electromagnetic core. Under the action of the magnetic field, a mutual attraction force is generated between the fixed iron core 9 and the moving iron core 10. The magnitude of the force is related to the magnitude of the current passed through the coil. The larger the current, the greater the attraction, and the smaller the current, the smaller the attraction. The attraction can make the moving iron core 10 approach the fixed iron core 9 along the first direction in the magnetic isolation sleeve 2, but due to the action of the adjustment spring 4 or the combined action of the adjustment spring 4 and the load, different currents will cause the moving iron core 10 to stay at corresponding different positions, thereby forming a proportional adjustment function.

[0059] Due to the use of an adjustable pole shoe electromagnetic core, the output characteristics of the proportional solenoid valve can be appropriately adjusted so that it can better match supporting equipment such as valves, and can also better match working conditions such as pressure in specific usage scenarios. Therefore, the adjustable pole shoe electromagnetic core can be used as a power unit of the proportional solenoid valve, and can also be used as a driving unit for the output force or displacement signal of the proportional solenoid valve, that is, it can cope with various application scenarios required by the proportional solenoid valve.

[0060] In the optional scheme of this embodiment, the first adjustment structure 12 includes a first external thread provided on the outer surface of the first pole shoe 6 and a first internal thread provided on the inner surface of the shell, and the first pole shoe 6 is adjustably screwed to the shell along the first direction through the first internal thread and the first external thread. Among them, the first internal thread, the first external thread, the shell and the first pole shoe 6 are coaxially arranged and the axes all extend along the first direction. The first adjustment structure 12 is formed by the first internal thread and the first external thread, which can not only ensure that the first pole shoe 6 is firmly connected to the shell, but also enable the relative position relationship between the two to have a variety of choices. Therefore, by rotating the first pole shoe 6 in the forward direction, the first pole shoe 6 can be adjusted to the bottom side relative to the shell, and conversely, by rotating the first pole shoe 6 in the reverse direction, the first pole shoe 6 can be adjusted to the top side relative to the shell, and the position adjustment is very convenient and easy to operate.

[0061] Optionally, the first internal thread is provided on the inner ring of the cover plate 5 , so that the first pole shoe 6 is adjustably connected to the housing through the cover plate 5 .

[0062] In the optional scheme of this embodiment, the second adjustment structure 13 includes a second external thread provided on the outer surface of the second pole shoe 1 and a second internal thread provided on the inner surface of the shell, and the second pole shoe 1 is adjustably screwed to the shell along the first direction through the second internal thread and the second external thread. Among them, the second internal thread, the second external thread, the shell and the second pole shoe 1 are coaxially arranged and the axes all extend along the second direction. The second adjustment structure 13 is formed by the second internal thread and the second external thread, which can not only ensure that the second pole shoe 1 is firmly connected to the shell, but also make the relative position relationship between the two have a variety of choices. Therefore, by rotating the second pole shoe 1 in the forward direction, the second pole shoe 1 can be adjusted to the bottom side relative to the shell, and conversely, by rotating the second pole shoe 1 in the reverse direction, the second pole shoe 1 can be adjusted to the top side relative to the shell, and the position adjustment is very convenient and easy to operate.

[0063] Optionally, the bottom of the shell 3 is provided with a threaded mounting hole corresponding to the second pole shoe 1, and the thread of the threaded mounting hole forms a second internal thread for screwing the second pole shoe 1 to the shell 3. In order to avoid the second pole shoe 1 being exposed, the part of the second pole shoe 1 exposed to the shell 3 is covered by a bottom cover detachably connected to the bottom of the shell.

[0064] Specifically, first determine the relative positions of the first pole shoe 6 and the second pole shoe 1 relative to the housing 3 according to the characteristics of the force or displacement output by the proportional solenoid valve required at the construction site; then screw the second pole shoe 1 to the threaded mounting hole to the ideal position, and then insert the first assembly composed of the magnetic isolation sleeve 2, the moving iron core 10, the fixed iron core 9, the push rod 8 and the adjusting spring 4 into the second pole shoe 1; screw the cover plate 5 to the first pole shoe 6 to the ideal position, and then put the second assembly composed of the cover plate and the first pole shoe 6 on the outside of the magnetic isolation sleeve 2, and finally assemble other components based on this to obtain the proportional solenoid valve. It is worth noting that no matter how the first pole shoe 6 and the second pole shoe 1 are positioned relative to the housing 3, they do not affect the positions of the fixed iron core 9 and the magnetic isolation sleeve 2 relative to the housing 3.

[0065] The second pole shoe 1 The second pole shoe 1 In the optional scheme of this embodiment, another first adjustment structure 12 and a second adjustment structure 13 are also provided. The first adjustment structure 12 includes an adjustable foot. The length of the adjustable foot extended to the bottom of the annular flange portion is adjustable. The two ends of the adjustable foot are respectively a fixed end of the foot and a movable end of the foot. The setting position of the fixed end of the foot along the first direction remains unchanged. As long as the connection position of the movable end of the foot and the annular flange portion and the distance between the fixed end of the foot are adjusted, the position of the first pole shoe 6 along the first direction can be adjusted through the adjustable foot.

[0066] Optionally, a proportional solenoid valve with an adjustable pole shoe electromagnetic core is used, and the fixed end of the adjustable foot is supported on the cover plate 5. Since the position of the cover plate 5 along the first direction remains unchanged, the position of the first pole shoe 6 along the first direction can be adjusted by adjusting the distance between the adjustable foot and the annular flange portion supported by the cover plate 5.

[0067] Optionally, there are multiple adjustable feet, and the multiple adjustable feet are distributed along the circumference of the annular flange portion.

[0068] In an optional solution of this embodiment, the adjustable support foot is an adjusting bolt, the annular flange portion is provided with a threaded connection hole, and the adjusting bolt is screwed to the threaded connection hole in an adjustable manner along a first direction.

[0069] By rotating the adjusting bolt toward the side where the moving iron core 10 is located, the first pole shoe 6 can be adjusted toward the side where the fixed iron core 9 is located; by rotating the adjusting bolt toward the side where the fixed iron core 9 is located, the first pole shoe 6 can be adjusted toward the side where the moving iron core 10 is located. The use of the adjusting bolt has a simple structure and is convenient for adjustment. The connection between the adjusting bolt and the annular flange portion is reliable, and the first pole shoe 6 will not slide after the position is determined.

[0070] Optionally, a positioning blind hole is provided on the cover plate 5 so that the foot fixing end of the adjusting bolt is fixed in the positioning blind hole, thereby providing circumferential positioning for the adjusting bolt and preventing the adjusting bolt from being deflected.

[0071] Specifically, the extension length of the adjustable leg is determined according to the supporting equipment and the use conditions and all the gaskets are selected, and then all the gaskets and the second pole shoe 1 are sequentially mounted on the magnetic isolation sleeve 2 and supported by the second platform portion. Then the magnetic isolation sleeve 2 is assembled with the housing 3 of the proportional solenoid valve, and the second pole shoe 1 with the adjustable leg assembled is mounted on the magnetic isolation sleeve 2 so that the adjustable leg abuts against the cover plate 5. Finally, the fixed iron core 9, the push rod 8, the adjustment spring 4, and the moving iron core 10 are sequentially assembled into the magnetic isolation sleeve 2, and then the upper cover 7 is connected with the push rod 8 and the housing 3.

[0072] The proportional solenoid valve in this embodiment has the advantages of the pole shoe adjustable electromagnetic core in the first embodiment, and the advantages of the pole shoe adjustable electromagnetic core disclosed in the first embodiment will not be described repeatedly here.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention is described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention. In addition, those skilled in the art can understand that although some embodiments described herein include certain features included in other embodiments instead of other features, the combination of features of different embodiments means that they are within the scope of the present invention and form different embodiments. For example, any one of the embodiments claimed for protection can be used in any combination. The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as an admission or in any form of implication that the information constitutes prior art known to those skilled in the art.

Claims

1. An electromagnetic core with adjustable pole shoes, characterized in that: include: Fixed iron core, moving iron core, pole shoe assembly and adjustment assembly; The moving iron core is movably arranged on the bottom side of the fixed iron core along a first direction, and the pole shoe assembly is sleeved on the outer sides of the fixed iron core and the moving iron core; the moving iron core can move toward the side where the fixed iron core is located under the action of an electromagnetic field; The adjusting assembly is connected to the pole shoe assembly to adjust the position of the pole shoe assembly along the first direction; The adjustment assembly includes a first adjustment structure and a second adjustment structure, and the pole shoe assembly includes a first pole shoe and a second pole shoe; The first pole shoe is sleeved on the fixed iron core, and the second pole shoe is sleeved on the moving iron core; The first adjustment structure is connected to the first pole shoe to adjust the position of the first pole shoe along the first direction; The second adjustment structure is connected to the second pole shoe to adjust the position of the second pole shoe along the first direction; The pole shoe adjustable electromagnetic core also includes a magnetic isolation sleeve; The fixed iron core and the moving iron core are both arranged in the magnetic isolation sleeve; The outer peripheral side walls of the moving iron core are respectively fitted with the inner walls of the magnetic isolation sleeve.

2. The pole shoe adjustable electromagnetic core according to claim 1, characterized in that: The first pole shoe comprises a first cylindrical body, an annular flange portion connected to the top end of the cylindrical body, and a first tapered removal portion provided on the bottom outer surface of the first cylindrical body; The first cylindrical body is slidably mounted on the magnetic isolation sleeve corresponding to the fixed iron core.

3. The pole shoe adjustable electromagnetic core according to claim 1, characterized in that: The second pole piece includes a second cylindrical body and a second tapered removed portion disposed on a top outer surface of the second cylindrical body; The second cylindrical body is slidably mounted on the magnetic isolation sleeve corresponding to the moving iron core.

4. A proportional solenoid valve, characterized in that: The invention comprises the pole shoe adjustable electromagnet core according to any one of claims 1 to 3.

5. The proportional solenoid valve according to claim 4, characterized in that: It also includes a shell, the pole shoe adjustable electromagnetic iron core is arranged in the shell, and the fixed iron core of the pole shoe adjustable electromagnetic iron core is relatively fixed to the shell.

6. The proportional solenoid valve according to claim 5, characterized in that: The first adjustment structure of the pole shoe adjustable electromagnetic core comprises a first external thread provided on the outer surface of the first pole shoe and a first internal thread provided on the inner surface of the housing, and the first pole shoe and the housing are adjustably screwed together along a first direction through the first internal thread and the first external thread; The second adjustment structure of the pole shoe adjustable electromagnetic core includes a second external thread arranged on the outer surface of the second pole shoe and a second internal thread arranged on the inner surface of the shell. The second pole shoe and the shell are adjustably screwed together along the first direction through the second internal thread and the second external thread.

7. The proportional solenoid valve according to claim 6, characterized in that: The length of the first internal thread along the first direction is less than the length of the first external thread along the first direction; A length of the second internal thread along the first direction is smaller than a length of the second external thread along the first direction.

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