Shock-resistant electromagnetic valve

Abstract

The utility model discloses an anti-impact electromagnetic valve, which belongs to the technical field of valves, and comprises an electromagnetic driver and a valve body, the electromagnetic driver comprises a coil winding, a static iron core and a movable iron core, the valve body comprises a valve seat and a valve core, and the static iron core and the movable iron core both comprise laminated silicon steel sheets. The matching relation between the valve element and the valve seat and the matching relation between the static iron core and the movable iron core meet the condition that in the process that the movable iron core moves relative to the valve seat, the movable iron core can move to make contact with the static iron core; the silicon steel sheets, used for being in contact with the static iron core, of the movable iron core and the silicon steel sheets, used for being in contact with the movable iron core, of the static iron core have the following matching relation that a connecting body is arranged between any two adjacent silicon steel sheets and is of a connecting structure formed between the silicon steel sheets through welding; the connecting structure is used for realizing fixed connection between the silicon steel sheets. The structural characteristics of the scheme can ensure that the movable iron core and the static iron core respectively have good deformation resistance in the repeated impact process.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to an impact-resistant solenoid valve. Background Art

[0002] A solenoid valve is a valve device based on electromagnetic drive. It is an automated basic component used to control fluids and is widely used. A solenoid valve belongs to an actuator. Its common use is in industrial control systems, and it adjusts the direction, flow rate, speed, or other parameters of the medium according to control instructions.

[0003] Generally, a solenoid valve includes an electromagnetic drive mechanism and a valve body. The electromagnetic drive mechanism includes a housing, an electromagnetic coil installed in the housing, and an iron core assembly centered relative to the electromagnetic coil. The iron core assembly includes an iron core and a valve stem. The iron core includes a moving iron core and a stationary iron core. The valve body includes a valve body and a valve core disposed in the valve body. The valve core is connected to the moving iron core through the valve stem. When the moving iron core moves under the electromagnetic force, the valve core is driven by the valve stem to move, thereby changing the action mode of the valve body on the medium. At the same time, the solenoid valve is also configured with a return spring located in the electromagnetic drive mechanism or the valve body. When the electromagnetic coil is powered off, the valve core performs a reset action relative to the valve body under the action of the return spring. In summary, the solenoid valve uses electromagnetic force as the driving force and controls the position of the valve core during the working process to achieve the purpose of adjusting the direction, flow rate, speed, or other parameters of the medium.

[0004] In the structural design of existing electromagnetic drive mechanisms, there is an iron core solution using a silicon steel sheet skeleton. Compared with an integral iron core, this type of iron core has a higher magnetic induction intensity value, has ideal magnetoelectric performance, and also has the characteristics of low preparation cost. Specific solutions are as disclosed in patent application documents with patent application numbers such as CN201410230032.0, CN201610978182.9, CN201420277988.1, etc. The structural composition of this type of iron core includes laminated silicon steel sheets and a connection structure for maintaining the mating relationship of the silicon steel sheets. The connection structure includes, but is not limited to, rivets. The specific connection method is that the rivets pass through the laminated silicon steel sheets, and the position of the silicon steel sheets in the axial direction of the rivets is defined by the pressing caps at both ends of the rivets. The thickness of the silicon steel sheets in this field generally ranges from 0.1 to 0.3 mm.

[0005] As a medium control device, the solenoid valve is applied in various industrial fields. To ensure the performance of the solenoid valve, it is necessary to further optimize the relevant structures of the solenoid valve. Summary of the Utility Model

[0006] In view of the above-mentioned problem of further optimizing the relevant structure of the solenoid valve, the present utility model provides an impact-resistant solenoid valve. In this solution, the electromagnetic drive mechanism of the solenoid valve adopts a silicon steel sheet skeleton, and its structural characteristics can ensure that the moving iron core and the static iron core both have good anti-deformation capabilities during repeated impacts.

[0007] In view of the above problems, an impact-resistant solenoid valve provided by the present utility model solves the problems through the following technical key points: An impact-resistant solenoid valve includes an electromagnetic driver and a valve body. The electromagnetic driver includes a coil winding, a static iron core, and a moving iron core. The valve body includes a valve seat and a valve core. The moving iron core is connected to the valve core through a valve rod. Both the static iron core and the moving iron core include laminated silicon steel sheets. The cooperation relationship between the valve core and the valve seat, and the cooperation relationship between the static iron core and the moving iron core satisfy: during the movement of the moving iron core relative to the valve seat along with the valve core, the moving iron core can move to contact the static iron core;

[0008] The silicon steel sheets forming the static iron core are riveted to each other, and the silicon steel sheets forming the moving iron core are riveted to each other;

[0009] The silicon steel sheets at the positions where the moving iron core is used to contact the static iron core and the silicon steel sheets at the positions where the static iron core is used to contact the moving iron core both have the following cooperation relationship:

[0010] There is a connecting body between any adjacent silicon steel sheets. The connecting body is a connecting structure formed by welding between the silicon steel sheets, and this connecting structure is used to realize the fixed connection between the silicon steel sheets.

[0011] In this solution, the static iron core and the moving iron core including laminated silicon steel sheets are the iron cores with silicon steel sheets as the skeleton. The above solution provides a technical solution with good anti-deformation capabilities for each of the moving iron core and the static iron core during repeated impacts in view of the structural characteristics of this type of iron core and its working characteristics in the solenoid valve. Specifically:

[0012] In the electromagnetic drive part of the solenoid valve, the coil winding, the static iron core, and the moving iron core are all basic components, and those skilled in the art can adopt possible ways for their specific assembly relationships; the cooperation relationship between the valve core and the valve seat, and the cooperation relationship between the static iron core and the moving iron core are as follows: when the corresponding cooperation relationship is set such that the moving iron core moves synchronously with the valve core in the valve seat under the action of the valve rod, the limiting effect of the valve seat on the valve core will not prevent the moving iron core and the static iron core from forming a state of being in contact with each other (or there is no limiting effect). For example, when in the state of being in contact with each other, the solenoid valve is in a certain required state, which can be an open state or a closed state. If this state is achieved by energizing the coil winding and driving the moving iron core to move, then at this time, due to the cooperation relationship of the static iron core and the moving iron core being in contact with each other, the electromagnetic drive has a relatively high efficiency in this state. However, in this application, when the moving iron core moves towards the static iron core and the position of the valve core is restricted by the supporting effect of the static iron core on the moving iron core, due to the solenoid valve frequently switching between the open state, impacts occur between the static iron core and the moving iron core. The relatively thin silicon steel sheets on the iron core are deformed during the repeated action process, and ultimately the working characteristics of the electromagnetic drive change, and even the cooperation position of the valve core in the valve body changes in an unacceptable manner. Based on the above application characteristics and the characteristics of the iron core with silicon steel sheets as the skeleton, a technical solution including the connecting body is provided. Specifically, on the basis of the silicon steel sheets in the iron core being riveted and connected by rivets, the connecting body is provided at the positions on the moving iron core and the static iron core that are used to contact the other. The connecting body connects the silicon steel sheets at the impact position into an overall stress-bearing structure, and utilizes the connection strength of the connection structure formed by welding to maintain the integrity of the overall stress-bearing structure during the repeated impact process. Finally, the impact position has good anti-deformation ability, avoiding shape change or even partial detachment caused by repeated impacts, and achieving the purpose of maintaining the performance parameters of the electromagnetic drive and the cooperation accuracy between the valve seat and the valve core in the valve body.

[0013] As a further technical solution of the impact-resistant solenoid valve:

[0014] To ensure the size of the iron core, it is advisable to use a connecting body that does not affect the size of the iron core. As a specific implementation form of the connecting body, the connecting body is a hoop or a brazing layer;

[0015] The hoop is: a circular groove is provided on the surface of the moving iron core or the static iron core, and the circular groove has a groove penetrating both sides of the silicon steel sheet. The hoop is a filling body formed by welding in the groove;

[0016] The brazing layer is a filling layer formed by brazing in the gaps between adjacent silicon steel sheets. In this solution, the annular groove can be set to include grooves parallel to the spacing direction of the silicon steel sheets and grooves perpendicular to the spacing direction of the silicon steel sheets. The grooves parallel to the spacing direction of the silicon steel sheets span across each silicon steel sheet, and the grooves perpendicular to the spacing direction of the silicon steel sheets are located on several silicon steel sheets on the side of the iron core. In this way, after the melt formed by welding fills the annular groove and cools, the hoop is formed. In the process of obtaining a silver hoop, it is advisable to use a welding process to form a brazing layer in the gaps between the silicon steel sheets in the peripheral area of the annular groove to make up for the poor tensile strength of the hard hoop. The brazing layer is a filling layer with a certain depth obtained at the impact position of the iron core through an immersion silver brazing process.

[0017] As a person skilled in the art, the silicon steel sheet is a silicon steel thin plate. In existing applications, the stacking direction of the silicon steel sheets on the iron core is perpendicular to the axis direction of the coil winding. After using a connecting body to constrain the relative positions in the spacing direction of the silicon steel sheets, the silicon steel sheets themselves can withstand the impact force parallel to the axis direction of the valve core. To facilitate the implementation of the welding, obtain better adhesion of the connecting body to the silicon steel sheets, and make the formed connecting body have a certain plasticity to absorb energy during the impact, the hoop is a silver ring, and the brazing layer is an immersion silver brazing layer.

[0018] As a specific implementation manner of the electromagnetic driver, the static iron core is of a U-shaped structure, the coil winding is centrally arranged inside the static iron core, a hole for the valve stem to pass through is provided at the bottom of the static iron core, and convex platforms with ends located inside the static iron core are provided on both sides of the upper end of the static iron core;

[0019] The moving iron core is of a T-shaped structure with the wider end at the upper end, and the moving iron core is arranged inside the static iron core;

[0020] The shapes and sizes of the moving iron core and the static iron core satisfy that when the lower end surface of the wider end of the moving iron core contacts the upper end surface of the convex platform, the lower end surface of the moving iron core contacts the upper end surface of the bottom of the static iron core;

[0021] Connecting bodies are provided at the lower end face position of the wider end of the moving iron core, the lower end face position of the moving iron core, the upper end face position of the bottom of the static iron core, and the upper end face position of the boss. The present solution is as follows: the moving iron core is inserted into the inside of the static iron core from the upper end, and the valve stem passes through the bottom of the static iron core through the said hole, so that the lower end of the moving iron core can act on the upper end of the valve stem. In this solution, when the lower end face on the upper side of the moving iron core contacts the upper end face of the boss, the lower end face of the moving iron core contacts the upper end face of the bottom of the static iron core. At this time, the moving iron core and the static iron core form a complete magnetic circuit, which can ensure the efficiency of the electromagnetic actuator in this state. Further, for the contact relationship between the moving iron core and the static iron core as mentioned above, connecting bodies are provided at the relevant contact parts, so that the whole iron core has the ability to resist impact deformation and prevent the silicon steel sheets from loosening. In specific implementation, the silicon steel sheets of the moving iron core are in a T shape, and these silicon steel sheets are stacked along the thickness direction to obtain the silicon steel sheet skeleton of the moving iron core; the silicon steel sheets of the static iron core include fins forming the said boss, and these silicon steel sheets are stacked along the thickness direction to obtain the silicon steel sheet skeleton of the static iron core.

[0022] In the iron core structure provided above, in order to improve the utilization rate of the iron core, it is advisable to set the width of the upper end of the moving iron core to be the same as the width of the boss, and in the said width direction, the end face of the moving iron core and the end face of the static iron core are coplanar. Therefore, the impact area of the lower end face of the upper end of the moving iron core covers all positions in the width direction, and the impact area of the upper end face of the boss covers all positions in the width direction. For the lower end of the moving iron core, a better application is that the acting position of the valve stem on the moving iron core is located at the center of the lower end face. Therefore, the impact area of the lower end of the moving iron core is located on the periphery of the center. For the upper end face of the bottom of the static iron core, the acting position of the moving iron core on it is located on the periphery of the hole. As a technical solution for easily obtaining the connecting body, the connecting body at the upper end face position of the bottom of the static iron core is the first connecting layer, and the first connecting layer is: a brazing layer formed between the silicon steel sheets, surrounding the said hole, and connected to the said hole on the inside;

[0023] The connecting body at the lower end face position of the moving iron core is the second connecting layer, and the second connecting layer is: a brazing layer formed between the silicon steel sheets and covering the area on the lower end face of the moving iron core for contacting the static iron core;

[0024] The connecting bodies at the upper end face position of the boss and the lower end face position of the wider end are both hoop rings. In this solution, the first connecting layer and the second connecting layer can be directly obtained through the silver immersion brazing process, that is, there is no need to set a relatively difficult-to-process annular groove on the upper end face of the bottom of the static iron core, and there is no need to process an annular groove on the bottom of the static iron core with a smaller end face size. For the upper end face position of the boss and the lower end face of the wider end, by processing the two sides thereof to obtain a groove perpendicular to the spacing direction of the silicon steel sheets and obtaining a groove parallel to the spacing direction of the silicon steel sheets through transverse cutting and making the groove communicate with the above groove, a complete annular groove for setting the filling body can be formed.

[0025] As a technical solution for guiding the movement of the moving iron core by using the central hole of the coil winding and ensuring the electromagnetic efficiency of the electromagnetic driver, the coil winding is coaxial with the duct, and a sleeve made of magnetic isolation material is also installed in the inner hole of the coil winding, and the moving iron core is slidably fitted in the sleeve.

[0026] To achieve the connection strength of the connecting body to the silicon steel sheet and the control of deformation constraint, the depth of the brazing layer is greater than or equal to 4 mm.

[0027] The utility model has the following beneficial effects:

[0028] Based on the connection of the silicon steel sheets in the iron core by riveting, the connecting body is arranged at the positions of the moving iron core and the static iron core where they are in contact with each other. The connecting body connects the silicon steel sheets at the impact position into an integral stress-bearing structure, and utilizes the connection strength of the connection structure formed by welding to maintain the integrity of the integral stress-bearing structure during repeated impacts. Finally, the impact position has good anti-deformation ability, avoiding shape change or even partial detachment caused by repeated impacts, and achieving the purpose of maintaining the performance parameters of the electromagnetic driver and the matching accuracy between the valve seat and the valve core in the valve body. Description of the Drawings

[0029] Figure 1 It is the front view of a specific embodiment of the impact-resistant solenoid valve according to this solution;

[0030] Figure 2 It is the side view of a specific embodiment of the impact-resistant solenoid valve according to this solution;

[0031] Figure 3 It is Figure 2 The cross-sectional view obtained by cutting the structure shown along the A-A direction;

[0032] Figure 4 It is Figure 3 The top view of the static iron core of part A in

[0033] Figure 5 It is Figure 3 The partial enlarged view of part A in

[0034] Figure 6 It is Figure 3 The partial enlarged view of part A in Figure 5 Different from

[0035] The reference numerals in the figures are respectively: 1, static iron core; 2, coil winding; 3, valve body; 4, valve core; 5, valve seat; 6, valve stem; 7, moving iron core; 8, first connection layer; 9, second connection layer; 10, filling body; 11, rivet; 12, groove; 13, boss; 14, sleeve. Detailed implementation mode

[0036] The following further elaborates on the present utility model in conjunction with embodiments, but the present utility model is not limited to the following embodiments:

[0037] Embodiment 1:

[0038] As Figures 1 to 6 shown, an impact-resistant solenoid valve includes an electromagnetic driver and a valve body 3. The electromagnetic driver includes a coil winding 2, a static iron core 1, and a moving iron core 7. The valve body 3 includes a valve seat 5 and a valve core 4. The moving iron core 7 is connected to the valve core 4 through a valve stem 6. Both the static iron core 1 and the moving iron core 7 include laminated silicon steel sheets. The matching relationship between the valve core 4 and the valve seat 5, and the matching relationship between the static iron core 1 and the moving iron core 7 satisfy that during the movement of the moving iron core 7 relative to the valve seat 5 along with the valve core 4, the moving iron core 7 can move to contact the static iron core 1;

[0039] The silicon steel sheets forming the static iron core 1 are riveted to each other, and the silicon steel sheets forming the moving iron core 7 are riveted to each other;

[0040] The silicon steel sheets at the positions where the moving iron core 7 is used to contact the static iron core 1, and the silicon steel sheets at the positions where the static iron core 1 is used to contact the moving iron core 7 all have the following matching relationship:

[0041] There is a connecting body between any adjacent silicon steel sheets. The connecting body is a connecting structure formed by welding between the silicon steel sheets, and this connecting structure is used to realize the fixed connection between the silicon steel sheets.

[0042] In this solution, the static iron core 1 and the moving iron core 7 including laminated silicon steel sheets are iron cores with silicon steel sheets as the skeleton. The above solution provides a technical solution with good anti-deformation ability for each of them during the repeated impact process between the moving iron core 7 and the static iron core 1 according to the structural characteristics of this type of iron core and its working characteristics in the solenoid valve. Specifically:

[0043] In the electromagnetic drive part of the solenoid valve, the coil winding, the static iron core 1, and the moving iron core 7 are all basic components, and those skilled in the art can adopt possible ways for their specific assembly relationships; the mating relationship between the valve core 4 and the valve seat 5, and the mating relationship between the static iron core 1 and the moving iron core 7 are: when the corresponding mating relationship is set such that the moving iron core 7 moves synchronously with the valve core 4 in the valve seat 5 under the action of the valve rod 6, the limiting effect of the valve seat 5 on the valve core 4 will not prevent the moving iron core 7 from forming a state of being in contact with the static iron core 1 (or there is no limiting effect). For example, when in the state of being in contact, the solenoid valve is in a certain required state, which can be an open state or a closed state. If this state is achieved by energizing the coil winding 2 and driving the moving iron core 7 to move, then at this time, due to the mating relationship of the static iron core 1 and the moving iron core 7 being in contact, the electromagnetic drive has a higher efficiency in this state. However, in this application, when the moving iron core 7 moves towards the static iron core 1, and the position of the valve core 4 is restricted by the supporting effect of the static iron core 1 on the moving iron core 7, due to the solenoid valve frequently switching between the open state, impacts are generated between the static iron core 1 and the moving iron core 7. The thinner silicon steel sheets on the iron cores are deformed during the repeated action, and finally the working characteristics of the electromagnetic drive change, and even the mating position of the valve core 4 in the valve body 3 changes in an unacceptable way. Based on the above application characteristics and the characteristics of the iron core with silicon steel sheets as the skeleton, a technical solution including the connecting body is provided. Specifically, on the basis of the silicon steel sheets in the iron core being riveted and connected by rivets 11, the connecting body is provided at the positions on the moving iron core 7 and the static iron core 1 that are used to contact the other. The connecting body connects the silicon steel sheets at the impact position into an overall stress-bearing structure, and uses the connection strength of the connection structure formed by welding to maintain the integrity of the overall stress-bearing structure during repeated impacts. Finally, the impact position has good anti-deformation ability, avoiding shape changes or even local detachment caused by repeated impacts, so as to achieve the purpose of maintaining the performance parameters of the electromagnetic drive and the mating accuracy between the valve seat 5 and the valve core 4 in the valve body 3.

[0044] Embodiment 2:

[0045] This embodiment is further refined on the basis of Embodiment 1:

[0046] To ensure the size of the iron core, a connecting body that does not affect the size of the iron core should be used. As a specific implementation form of the connecting body, the connecting body is a hoop or a brazing layer;

[0047] The hoop is: a ring-shaped groove is provided on the surface of the moving iron core 7 or the static iron core 1, and the ring-shaped groove has a groove 12 that penetrates both sides of the silicon steel sheet. The hoop is a filling body 10 formed by welding in the groove 12;

[0048] The brazing layer is a filling layer formed by brazing in the gaps between adjacent silicon steel sheets. In this solution, the annular groove can be set to include a groove 12 parallel to the direction of the spacing between the silicon steel sheets and a groove 12 perpendicular to the direction of the spacing between the silicon steel sheets. The groove 12 parallel to the direction of the spacing between the silicon steel sheets straddles each silicon steel sheet, and the groove 12 perpendicular to the direction of the spacing between the silicon steel sheets is located on several silicon steel sheets on the side of the iron core. In this way, after the melt formed by welding fills the annular groove and cools, the hoop is formed. In the process of obtaining a silver hoop, it is advisable to use a welding process to form a brazing layer in the gaps between the silicon steel sheets in the peripheral area of the annular groove to make up for the poor tensile strength of the hard hoop. The brazing layer is a filling layer with a certain depth obtained by the silver dipping brazing process at the impact position of the iron core.

[0049] Embodiment 3:

[0050] This embodiment is further refined on the basis of Embodiment 2:

[0051] As a person skilled in the art, the silicon steel sheet is a silicon steel thin plate. In existing applications, the stacking direction of the silicon steel sheets on the iron core is perpendicular to the axis direction of the coil winding 2. When the relative positions in the direction of the spacing between the silicon steel sheets are restricted by the connecting body, the silicon steel sheets themselves can withstand the impact force parallel to the axis direction of the valve core 4. To facilitate the implementation of the welding, obtain better adhesion of the connecting body to the silicon steel sheet, and make the formed connecting body have a certain plasticity to absorb energy during the impact, the hoop is a silver ring, and the brazing layer is a silver dipping brazing layer.

[0052] Embodiment 4:

[0053] This embodiment is further refined on the basis of Embodiment 2:

[0054] As a specific implementation manner of the electromagnetic actuator, the static iron core 1 is of a U-shaped structure, the coil winding 2 is centrally arranged inside the static iron core 1, a hole for the valve stem 6 to pass through is provided at the bottom of the static iron core 1, and convex platforms 13 with ends located inside the static iron core 1 are arranged on both sides of the upper end of the static iron core 1;

[0055] The moving iron core 7 is of a T-shaped structure with the wider end at the upper end, and the moving iron core 7 is arranged inside the static iron core 1;

[0056] The shapes and dimensions of the moving iron core 7 and the static iron core 1 satisfy that when the lower end face of the wider end of the moving iron core 7 contacts the upper end face of the convex platform 13, the lower end face of the moving iron core 7 contacts the upper end face of the bottom of the static iron core 1;

[0057] A connecting body is provided at the lower end face position of the wider end of the moving iron core 7, at the lower end face position of the moving iron core 7, at the upper end face position of the bottom of the static iron core 1, and at the upper end face position of the boss 13. The solution is as follows: The moving iron core 7 is inserted into the inside of the static iron core 1 from the upper end of the static iron core 1, and the valve stem 6 passes through the bottom of the static iron core 1 through the hole, so that the lower end of the moving iron core 7 can act on the upper end of the valve stem 6. In this solution, when the lower end face on the upper side of the moving iron core 7 contacts the upper end face of the boss 13, the lower end face of the moving iron core 7 contacts the upper end face of the bottom of the static iron core 1. At this time, the moving iron core 7 and the static iron core 1 form a complete magnetic circuit, which can ensure the efficiency of the electromagnetic actuator in this state. Further, for the contact relationship between the moving iron core 7 and the static iron core 1 as mentioned above, connecting bodies are provided at the relevant contact parts, so that the overall iron core has the ability to resist impact deformation and prevent the silicon steel sheets from loosening. In specific implementation, the silicon steel sheets of the moving iron core 7 are in a T shape, and these silicon steel sheets are stacked along the thickness direction to obtain the silicon steel sheet skeleton of the moving iron core 7; the silicon steel sheets of the static iron core 1 include fins forming the boss 13, and these silicon steel sheets are stacked along the thickness direction to obtain the silicon steel sheet skeleton of the static iron core 1.

[0058] Embodiment 5:

[0059] This embodiment is further refined on the basis of Embodiment 4:

[0060] In the iron core structure provided above, in order to improve the utilization rate of the iron core, it is advisable to set the width of the upper end of the moving iron core 7 to be the same as the width of the boss 13, and in the width direction, the end face of the moving iron core 7 and the end face of the static iron core 1 are coplanar. Therefore, the impact area of the lower end face of the upper end of the moving iron core 7 covers all positions in the width direction, and the impact area of the upper end face of the boss 13 covers all positions in the width direction. For the lower end of the moving iron core 7, a better application is that the acting position of the valve stem 6 on the moving iron core 7 is located at the center of the lower end face. Therefore, the impact area of the lower end of the moving iron core 7 is located on the periphery of the center. For the upper end face of the bottom of the static iron core 1, the acting position of the moving iron core 7 on it is located on the periphery of the hole. As a technical solution for easily obtaining the connecting body, the connecting body at the upper end face position of the bottom of the static iron core 1 is the first connecting layer 8, and the first connecting layer 8 is a brazing layer formed between the silicon steel sheets, surrounding the hole, and having its inner side connected to the hole;

[0061] The connecting body at the lower end face position of the moving iron core 7 is the second connecting layer 9, and the second connecting layer 9 is a brazing layer formed between the silicon steel sheets and covering the area on the lower end face of the moving iron core 7 for contacting the static iron core 1;

[0062] The connectors at the upper end face of the boss 13 and the connectors at the lower end face of the wider end are both hoop rings. In this solution, the first connection layer 8 and the second connection layer 9 can be obtained directly through the silver immersion brazing process. That is, there is no need to provide a relatively difficult-to-machine annular groove on the upper end face of the bottom of the static iron core 1, nor to machine an annular groove on the bottom of the static iron core 1 with a smaller end face dimension. For the upper end face of the boss 13 and the lower end face of the wider end, by machining both sides thereof to obtain grooves 12 perpendicular to the direction of the silicon steel sheet spacing, and by transverse cutting to obtain grooves 12 parallel to the direction of the silicon steel sheet spacing and making these grooves 12 communicate with the above-mentioned grooves 12, a complete annular groove for arranging the filler 10 can be formed.

[0063] Embodiment 6:

[0064] This embodiment is further refined on the basis of Embodiment 4:

[0065] As a technical solution for guiding the movement of the moving iron core 7 by using the central hole of the coil winding 2 and ensuring the electromagnetic efficiency of the electromagnetic actuator, the coil winding 2 is coaxial with the hole passage, and a sleeve 14 made of a magnetic isolation material is also installed in the inner hole of the coil winding 2, and the moving iron core 7 is slidably fitted in the sleeve 14.

[0066] Embodiment 7:

[0067] This embodiment is further refined on the basis of Embodiment 2:

[0068] To achieve the connection strength of the connector to the silicon steel sheet and the control of deformation constraint, the depth of the brazing layer is greater than or equal to 4 mm.

[0069] The above content is a further detailed description of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific embodiments of the present invention are only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, other embodiments obtained without departing from the technical solution of the present invention should all be included within the protection scope of the present invention.

Claims

1. An impact-resistant solenoid valve, comprising an electromagnetic driver and a valve body (3), wherein the electromagnetic driver comprises a coil winding (2), a static iron core (1) and a moving iron core (7), wherein the valve body (3) comprises a valve seat (5) and a valve core (4), wherein the moving iron core (7) is connected to the valve core (4) via a valve stem (6), wherein the static iron core (1) and the moving iron core (7) both comprise laminated silicon steel sheets, and wherein: The matching relationship between the valve core (4) and the valve seat (5), and the matching relationship between the static iron core (1) and the moving iron core (7) satisfy the following conditions: when the moving iron core (7) moves relative to the valve seat (5) along with the valve core (4), the moving iron core (7) can move to contact with the static iron core (1); The silicon steel sheets forming the stationary iron core (1) are riveted to each other, and the silicon steel sheets forming the moving iron core (7) are riveted to each other; The silicon steel sheets at the position where the moving iron core (7) is in contact with the static iron core (1), and the silicon steel sheets at the position where the static iron core (1) is in contact with the moving iron core (7) both have the following matching relationship: There is a connector between any adjacent silicon steel sheets. The connector is a connecting structure formed between the silicon steel sheets by welding. The connecting structure is used to achieve a fixed connection between the silicon steel sheets.

2. The impact-resistant solenoid valve according to claim 1, characterized in that: The connecting body is a hoop or a brazing layer; The hoop ring is: an annular groove is arranged on the surface of the moving iron core (7) or the stationary iron core (1), the annular groove has grooves (12) penetrating both sides of the silicon steel sheet, and the hoop ring is a filling body (10) formed in the groove (12) by welding; The brazing layer is a filling layer formed in the gap between adjacent silicon steel sheets by brazing.

3. The impact-resistant solenoid valve according to claim 2, characterized in that: The soldering layer is a silver immersion soldering layer.

4. An anti-shock solenoid valve according to claim 2 or 3, characterized in that: The static iron core (1) is of a U-shaped structure, the coil winding (2) is centrally arranged on the inner side of the static iron core (1), a hole for the valve stem (6) to pass through is arranged at the bottom of the static iron core (1), and bosses (13) with ends located on the inner side of the static iron core (1) are arranged on both sides of the upper end of the static iron core (1); The moving iron core (7) is a T-shaped structure with one end having a larger width located at the upper end, and the moving iron core (7) is arranged on the inner side of the stationary iron core (1); The shapes and sizes of the moving iron core (7) and the stationary iron core (1) satisfy the following conditions: when the lower end surface of the wider end of the moving iron core (7) contacts the upper end surface of the boss (13), the lower end surface of the moving iron core (7) contacts the upper end surface of the bottom of the stationary iron core (1); Connectors are provided at the lower end surface of the wider end of the moving iron core (7), the lower end surface of the moving iron core (7), the upper end surface of the bottom of the static iron core (1), and the upper end surface of the boss (13).

5. The impact-resistant solenoid valve according to claim 4, characterized in that: The connecting body at the upper end surface of the bottom of the static iron core (1) is a first connecting layer (8), and the first connecting layer (8) is: a brazing layer formed between the silicon steel sheets, surrounding the hole, and connected to the hole on the inside; The connecting body at the lower end surface of the moving iron core (7) is a second connecting layer (9), and the second connecting layer (9) is a brazing layer formed between silicon steel sheets and covering the area on the lower end surface of the moving iron core (7) for contacting with the stationary iron core (1); The connecting body at the upper end surface of the boss (13) and the connecting body at the lower end surface of the end with a larger width are both hoop rings.

6. The impact-resistant solenoid valve according to claim 4, characterized in that: The coil winding (2) is coaxial with the hole, a sleeve (14) made of magnetic isolation material is installed in the inner hole of the coil winding (2), and the moving iron core (7) is slidably fitted in the sleeve (14).

7. The impact-resistant solenoid valve according to claim 2, characterized in that: The depth of the soldering layer is greater than or equal to 4 mm.

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