A stop valve

Abstract

The application relates to the technical field of stop valves, in particular to a stop valve. The application provides a stop valve which comprises an electromagnetic coil, a static iron, a dynamic iron, a valve needle and a valve seat. The dynamic iron is circumferentially provided with a limiting block. The static iron is fixedly connected with a limiting component at one end close to the dynamic iron, and the end surface is provided with a specific sawtooth-shaped V-shaped groove. The limiting component is provided with a specific sawtooth-shaped V-shaped groove on the end surface and an axial limiting groove which is arranged at intervals with the V-shaped groove on the side surface. The V-shaped groove and the axial limiting groove of the limiting component are used for limiting the dynamic iron limiting block. Through the electromagnetic force of the electromagnetic coil and the spring action force, the dynamic iron limiting block is moved to the corresponding limiting position of the V-shaped groove of the limiting component or the axial limiting groove through the V-shaped groove of the static iron, so that the mechanical limiting of the valve needle and the valve seat is realized. In the application, the working position of the stop valve can be maintained without current, electricity can be saved, the opening degree of the valve can be improved, the flow resistance can be reduced, and the heat management efficiency can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of stop valve, more particularly, to a stop valve with self-locking function. BACKGROUND

[0002] Figure 1 A schematic diagram of a stop valve electromagnetic module used in the prior art automotive thermal management is disclosed, as shown in the prior art automotive thermal management, the stop valve electromagnetic module is generally composed of a static iron 110, an electromagnetic coil 120, a spring 140, a moving iron 130, a valve needle 150, a valve seat 160, etc., and its working principle is as follows: Figure 1

[0003] When the electromagnetic coil 120 is not powered, the valve needle 150 is in contact with the valve seat 160 under the spring force F s of the spring 140, so that the valve needle 150 and the valve seat 160 are in contact and sealed, and the valve seat 160 is in a closed state.

[0004] When the electromagnetic coil 120 is powered, the electromagnetic force F m generated by the electromagnetic coil 120 on the moving iron 130 overcomes the spring force, so that the moving iron 130 moves upward with the valve needle 150 until the two faces of the moving iron 130 and the static iron 110 are attracted, at which time F m >F s , so that the valve is in an open state with an opening degree s.

[0005] However, it can only maintain the continuous opening state of the valve under the condition of maintaining power-on, but long-time power-on consumes a large amount of electricity, has high energy consumption, shortens the cruising range of the automobile, and shortens the service life of the electromagnetic coil, and the reciprocating motion of the moving iron has a large impact on the static iron, which is noisy and easy to damage the electromagnetic valve after multiple uses, which is not conducive to the reliability of the product.

[0006] In addition, since continuous power-on is required, the current generally cannot be too large, otherwise, the coil may be ablated or other power components may be damaged; the limitation of the current size means that the electromagnetic force is limited, so the size of the opening degree s is also limited, so that a large opening degree cannot be achieved, which increases the flow resistance and further limits the heating or cooling efficiency of the thermal management system.

[0007] In order to maintain the open state of the valve needle and the valve seat without power, a self-locking mechanism is needed to lock the open position of the valve needle, so that the valve needle or the moving iron is mechanically limited by the self-locking mechanism to maintain the open state after power-off.

[0008] ​In the prior art, in order to realize the self-locking of the electromagnetic valve, an additional mechanical structure must be added to realize the self-locking. For example, the Chinese invention patent CN1330901C provides a power-on opening and closing mechanical holding electromagnetic valve, which is provided with an additional mechanism T-shaped valve rod, upper locking sleeve, lower locking sleeve and outer locking sleeve with sliding slot. Among them, the static iron and the valve rod are in plane relative, and when the electromagnetic coil is powered on, the valve rod and the static iron are in plane collision under the action of the electromagnetic force, so that the stress area is large, thereby increasing the noise. At the same time, the gap between the static iron and the valve rod is large, and the magnetic field strength generated after the coil is powered on needs to overcome a large gap to make the valve rod move upward, so that the current requirement is high and the energy consumption is large. Compared with the traditional electromagnetic valve, the self-holding module of the above-mentioned invention patent has one more driving spring and locking sleeve, and the structure is complex and the part cost is high. SUMMARY

[0009] The purpose of the present application is to provide a stop valve to solve the problem of complex self-locking structure of the prior art stop valve.

[0010] Another purpose of the present application is to provide a stop valve to solve the problem of continuous power-on of the prior art stop valve.

[0011] In order to achieve the above purpose, the present application provides a stop valve, which comprises an electromagnetic coil, a static iron, a moving iron, a valve needle and a valve seat, a spring is arranged between the static iron and the moving iron, one end of the valve needle is fixedly connected with the moving iron, and the other end is arranged opposite to the valve seat:

[0012] The moving iron is circumferentially provided with a limiting block;

[0013] The static iron is fixedly connected with a limiting part at one end close to the moving iron, and the end face is provided with a specific sawtooth-shaped V-shaped groove;

[0014] The limiting part is provided with a specific sawtooth-shaped V-shaped groove on the end face and an axial limiting groove arranged in interval with the V-shaped groove, and the V-shaped groove and the axial limiting groove of the limiting part are used for limiting the limiting block of the moving iron;

[0015] Through the electromagnetic force of the electromagnetic coil and the action force of the spring, the moving iron limiting block is moved to the corresponding limiting position of the V-shaped groove of the limiting part or the axial limiting groove through the V-shaped groove of the static iron, so as to realize the mechanical limiting of the valve needle and the valve seat.

[0016] In an embodiment, the moving iron is circumferentially provided with a plurality of limiting blocks, and the plurality of limiting blocks are distributed in axial symmetry.

[0017] In an embodiment, the width of the limiting block of the moving iron is less than the width of the axial limiting groove;

[0018] The number of the limiting block corresponds to the number of the axial limiting groove;

[0019] The distribution position of the limiting block matches the distribution position of the axial limiting groove.

[0020] In an embodiment, the static iron is provided with a cavity with a length L, and the head of the dynamic iron is located in the cavity of the static iron.

[0021] In an embodiment, the dynamic iron and the cavity of the static iron at least maintain a coinciding length L0.

[0022] Wherein, L0=L-L1, L is the length of the cavity of the static iron, and L1 is the extension length of the spring.

[0023] In an embodiment, in the cavity of the static iron, the radial gap between the static iron and the dynamic iron is 0-1mm.

[0024] In an embodiment, the corresponding inclination angle θ of the V-shaped groove of the static iron and / or the limiting component satisfies the following expression:

[0025] θ>arctanμ;

[0026] Wherein, μ is the friction coefficient of the material.

[0027] In an embodiment, the inclination angle θ is 30 degrees.

[0028] In an embodiment, the number of the V-shaped groove of the limiting component and the axial limiting groove is equal, and the V-shaped groove of the limiting component and the axial limiting groove are arranged at intervals.

[0029] In an embodiment, the number of the V-shaped groove of the static iron is at least 2.

[0030] The number of the V-shaped groove of the limiting component is at least 1.

[0031] The number of the axial limiting groove of the limiting component is at least 1.

[0032] The number of the V-shaped groove of the limiting component plus the number of the axial limiting groove is equal to the number of the V-shaped groove of the static iron.

[0033] In an embodiment, the number of the V-shaped groove of the limiting component and the number of the axial limiting groove are both 6.

[0034] In an embodiment, the static iron and the dynamic iron are both magnetic conductive materials.

[0035] In an embodiment, the static iron and the dynamic iron are both magnetic conductive stainless steel.

[0036] In an embodiment, a specific phase angle δ is maintained between the specific sawtooth-shaped V-shaped groove of the static iron and the specific sawtooth-shaped V-shaped groove of the stop sleeve.

[0037] The specific phase angle δ satisfies the following expression:

[0038]

[0039] Wherein, Δh = h0 - h, h0 is the height from the lower stop position of the moving iron to the V-shaped groove in the static iron, h is the height when the moving iron moves to the position of just contacting the inclined surface of the static iron, and r is the inner diameter of the static iron.

[0040] In an embodiment, the specific phase angle δ is 15 degrees.

[0041] In an embodiment, the head diameter φ1 of the moving iron is smaller than the inner diameter of the static iron cavity.

[0042] The outer contour of the limiting block circumscribes a circle with a diameter φ2 which is greater than the inner diameter of the static iron cavity.

[0043] In an embodiment, the stop valve further comprises a connecting ring for fixedly connecting the limiting component and the static iron, and the electromagnetic coil is fixedly sleeved outside the connecting ring.

[0044] In an embodiment, when the stop valve is switched from the closed state to the open state, the moving iron limiting block is at the bottom of the axial limiting groove, and the valve needle is in sealing contact with the valve seat.

[0045] After the electromagnetic coil is energized, the moving iron moves upward to the sawtooth inclined surface of the static iron, slides along the inclined surface to the V-shaped groove position of the static iron, the valve needle is separated from the valve seat, and the stop valve is opened.

[0046] After the electromagnetic coil is de-energized, the moving iron moves downward under the action of the spring force to the sawtooth inclined surface of the limiting component, slides along the inclined surface of the limiting component to the V-shaped groove position of the limiting component, and the stop valve remains in the open state.

[0047] In an embodiment, when the stop valve is switched from the open state to the closed state, the moving iron limiting block is at the V-shaped groove position of the limiting component, and the valve needle maintains the opening degree s with the valve seat.

[0048] After the electromagnetic coil is energized, the moving iron moves upward to the sawtooth inclined surface of the static iron, slides along the inclined surface to the V-shaped groove position of the static iron.

[0049] After the electromagnetic coil is de-energized, the moving iron moves downward under the action of the spring force to the sawtooth inclined surface of the limiting component, slides along the inclined surface of the limiting component to the V-shaped groove position of the limiting component, and the stop valve remains in the open state.

[0050] The stop valve provided by the application can be applied to the automobile thermal management system. On the one hand, by setting the relative position of the moving iron and the stop sleeve, the moving iron returns to the limiting position of the open and closed valve needle under the action of the spring force after de-energization, so that the working position of the stop valve is maintained without the need for current, thereby saving electricity. On the other hand, the opening degree of the valve can be increased to reduce the flow resistance, improve the thermal management efficiency, reduce the electromagnetic force demand, reduce the current size, avoid large plane collision, and reduce noise. BRIEF DESCRIPTION OF DRAWINGS

[0051] The above and other features, aspects and advantages of the present application will become more apparent after a review of the following detailed description, taken in conjunction with the drawings, wherein like reference numerals designate like features throughout the figures, and wherein:

[0052] Figure 1 A schematic diagram of an electromagnetic module of a cut-off valve used in automotive thermal management in the prior art is disclosed;

[0053] Figure 2 An exploded view of a cut-off valve according to an embodiment of the present application is disclosed;

[0054] Figure 3 A cross-sectional view of a cut-off valve according to an embodiment of the present application is disclosed;

[0055] Figure 4 A partial view of a cut-off valve according to an embodiment of the present application is disclosed;

[0056] Figure 5 A perspective view of a moving iron according to an embodiment of the present application is disclosed;

[0057] Figure 6 A working principle diagram of the opening and closing of a moving iron according to an embodiment of the present application is disclosed;

[0058] Figure 7a A principle diagram of the end face inclination angle of a static iron according to an embodiment of the present application is disclosed;

[0059] Figure 7b A schematic diagram of a V-shaped groove of an end face of a static iron according to an embodiment of the present application is disclosed;

[0060] Figure 8a A working principle diagram of a cut-off valve static iron in the prior art is disclosed;

[0061] Figure 8b A schematic diagram of the electromagnetic force of a moving iron static iron according to an embodiment of the present application is disclosed;

[0062] Figure 9a A principle diagram of the end face inclination angle of a cut-off sleeve according to an embodiment of the present application is disclosed;

[0063] Figure 9b A schematic diagram of a V-shaped groove and a rectangular groove of an end face of a cut-off sleeve according to an embodiment of the present application is disclosed;

[0064] Figure 10 A phase angle diagram of a cut-off sleeve according to an embodiment of the present application is disclosed;

[0065] Figure 11 A cross-sectional view of a moving iron according to an embodiment of the present application is disclosed.

[0066] The meanings of the reference numerals in the drawings are as follows:

[0067] 110 static iron

[0068] 120 electromagnetic coil

[0069] 130 moving iron

[0070] 140 spring

[0071] 150 valve needle

[0072] 160 valve seat

[0073] 210 valve seat

[0074] 220 valve needle

[0075] 230 moving iron

[0076] 231 limit block

[0077] 240 connecting seat

[0078] 250 stop sleeve

[0079] 251 V-shaped groove

[0080] 252 rectangular groove

[0081] 260 spring

[0082] 270 connecting ring

[0083] 280 static iron

[0084] 281 V-shaped groove

[0085] 290 electromagnetic coil

[0086] 291 magnetic induction line

[0087] 292 gap

[0088] 310 static iron

[0089] 320 valve rod

[0090] 330 gap

[0091] 340 magnetic induction line DETAILED DESCRIPTION

[0092] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0093] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in one or more embodiments or examples.

[0094] In order to solve the technical problems encountered in the prior art, the present application provides a stop valve with a self-locking function, which can be applied to an automobile thermal management system and other systems requiring the use of electromagnetic valves.

[0095] The following will take the stop valve in the automobile thermal management system as an example to further illustrate the stop valve with a self-locking function provided by the present application.

[0096] Figure 2 The exploded view of the stop valve according to an embodiment of the present application is disclosed, Figure 3 The cross-sectional schematic view of the stop valve according to an embodiment of the present application is disclosed, as shown in Figure 2 and Figure 3 As shown in the drawings, the stop valve provided by the present application comprises an electromagnetic coil 290, a static iron 280, a spring 260, a limiting component, a moving iron 230, a valve needle 220 and a valve seat 210:

[0097] In the present embodiment, the limiting component is a stop sleeve 250.

[0098] The spring 260 is arranged between the static iron 280 and the moving iron 230, one end of the valve needle 220 is fixedly connected with the moving iron 230, and the other end is arranged opposite to the valve seat 210:

[0099] The moving iron 230 is circumferentially provided with a limiting block 231;

[0100] The static iron 280 is fixedly connected with a limiting component at one end close to the moving iron 230, and the end face is provided with a specific sawtooth-shaped V-shaped groove 281;

[0101] The stop sleeve 250 is provided with a specific sawtooth-shaped V-shaped groove 251 at the end face, and is provided with an axial limiting groove arranged at intervals with the V-shaped groove 251 at the side face, and the limiting component V-shaped groove 251 and the axial limiting groove are used for limiting the moving iron limiting block 231;

[0102] The dynamic iron 230 is moved to the corresponding limiting position of the V-shaped groove 251 or the rectangular groove 252 of the cutoff sleeve 250 through the V-shaped groove 281 of the static iron 280 by the electromagnetic force of the electromagnetic coil and the spring force, so that the mechanical limiting of the valve needle 220 and the valve seat 210 is realized.

[0103] The dynamic iron sawtooth and the cutoff sleeve sawtooth keep a certain phase angle delta.

[0104] In the embodiment, the axial limiting groove is the rectangular groove 252, and the V-shaped groove 251 and the rectangular groove 252 are used for limiting the dynamic iron limiting block 231.

[0105] In the embodiment, the stop valve further comprises a connecting ring 270 and a connecting seat 240, the connecting ring 270 is used for fixedly connecting the cutoff sleeve 250 and the static iron 280.

[0106] The cutoff sleeve 250 is fixedly connected with the connecting seat 240.

[0107] The valve needle 220 is connected with the dynamic iron 230 at one end and is oppositely arranged with the valve seat 210 after penetrating through the connecting seat 240.

[0108] The electromagnetic coil 290 is fixedly sleeved outside the connecting ring 270.

[0109] In the embodiment, the static iron 280 is fixedly connected with the electromagnetic coil 290, and in other embodiments, the static iron 280 and the electromagnetic coil 290 can be connected in other manners.

[0110] Figure 4 A partial schematic view of a stop valve according to an embodiment of the application is disclosed. Figure 4 As shown, the static iron 280 is provided with a cavity with a length L.

[0111] The spring 260 is located in the cavity of the static iron 280, one end of the spring 260 is connected with the static iron 280, and the other end of the spring 260 is connected with the dynamic iron 230.

[0112] The head of the dynamic iron 230 is located in the cavity of the static iron 280, and at least a length L0 of the head of the dynamic iron 230 is overlapped with the static iron 280.

[0113] L0=L-L1, L is the length of the cavity of the static iron 280, and L1 is the telescopic length of the spring 260.

[0114] The stop valve provided by the application has the cavity with the length L in the static iron, so that the dynamic iron moves in the cavity, the gap between the dynamic iron and the static iron is small, the magnetic field flows through the small gap, the transmission path of the magnetic field is changed, and the current required by the application is smaller under the same electromagnetic force requirement.

[0115] Figure 5A three-dimensional schematic diagram of the moving iron according to an embodiment of the present application is shown in FIG. 1. Figure 5 As shown in FIG. 1, the moving iron 230 is designed with axisymmetric limit blocks 231 in the circumferential direction. The limit blocks 231 and the moving iron 230 can be designed as one body or as separate bodies.

[0116] The valve needle 220 and the moving iron 230 can be designed as one body or as separate bodies.

[0117] Figure 6 A working principle diagram of the opening and closing of the moving iron according to an embodiment of the present application is shown in FIG. 2. The working principle of the opening and closing of the moving iron is described in detail below. Figure 6 The working principle of the opening and closing of the moving iron is described in detail below.

[0118] Figure 6 The No. 1 position in FIG. 2 is the limit position (bottom of the rectangular groove) of the closed stop valve after power-off, and the No. 2 position is the limit position (V-shaped groove of the stop sleeve) of the normally open stop valve after power-off. The height difference between the No. 1 position and the No. 2 position is the valve opening degree s.

[0119] When the system needs to open the valve, i.e., the stop valve is switched from the closed state to the open state, the moving iron limit block 231 is at the bottom of the rectangular groove 252, and the valve needle 220 is in sealing contact with the valve seat 210.

[0120] The electromagnetic coil 290 is powered, and since there is a phase angle difference δ between the moving iron 230 and the static iron 280, the moving iron 230 moves upward from the No. 1 position to the sawtooth slope of the static iron 280, slides along the slope to the V-shaped groove position of the static iron 280, the valve needle 220 is separated from the valve seat 210, and the stop valve is opened.

[0121] Then, the electromagnetic coil 290 is powered off, and the moving iron 230 moves downward and moves downward to the sawtooth slope of the stop sleeve 250 under the action of the spring force, slides along the slope of the stop sleeve 250 to the V-shaped groove position of the stop sleeve, and the moving iron 230 is located at the No. 2 position.

[0122] At this time, the valve needle 220 and the valve seat 210 maintain the opening degree s, and the stop valve maintains the open state.

[0123] When the stop valve is switched from the open state to the closed state, the moving iron limit block 231 is at the V-shaped groove position of the stop sleeve 250, and the valve needle 220 and the valve seat 210 maintain the opening degree s.

[0124] The electromagnetic coil 290 is powered, and the moving iron 230 moves upward from the No. 2 position to the sawtooth slope of the static iron 280, slides along the slope to the V-shaped groove position of the static iron 280.

[0125] The electromagnetic coil 290 is powered off, the moving iron 230 goes down, and under the action of the spring force, it moves downward to the sawtooth inclined surface behind the stop sleeve 250, and then slides along the inclined surface of the stop sleeve 250 to the bottom of the rectangular groove of the stop sleeve 250, and the moving iron 230 is located at position 1;

[0126] Under the action of the spring force, the valve needle 220 is in contact with the valve seat 210 to seal, and the stop valve remains in the closed state.

[0127] Figure 7a The principle diagram of the inclination angle of the end surface of the static iron according to an embodiment of the present application is disclosed, Figure 7b The V-shaped groove diagram of the end surface of the static iron according to an embodiment of the present application is disclosed, as shown in Figure 7a and Figure 7b The static iron 280 proposed by the present application is specially designed with a sawtooth-shaped end surface and a cavity with a certain length L.

[0128] The end surface of the static iron 280 is designed to be a sawtooth shape with a certain inclination angle, and the inclination angle θ and the number of sawteeth need to be specially designed.

[0129] According to the force analysis, when the moving iron 230 contacts the inclined surface of the static iron 280 and can slide along the inclined surface, the corresponding inclination angle θ satisfies the following expression:

[0130] θ>arctanμ;

[0131] Wherein, μ is the material friction coefficient.

[0132] The moving iron and the static iron are both magnetic conductive materials, and as a preferred embodiment, in the present embodiment, they are specially designed to be magnetic conductive stainless steel.

[0133] f max The friction force f of the moving iron 230 contacting the inclined surface of the static iron 280 is designed to be smaller than the impact force F, and it can be known that the impact force is smaller than the traditional impact of the plane of the moving iron and the plane of the static iron, so the reliability is high, the service life of the product is improved, and the noise is small. N

[0134] As a preferred embodiment, in the present embodiment, the inclination angle θ is 30 degrees.

[0135] Wherein, the number of sawtooth-shaped V-shaped grooves 281 of the static iron 280 is ≥2, and as a preferred embodiment, there are 12 in the present embodiment.

[0136] The static iron 280 has a cavity with a certain length L for accommodating the moving range of the moving iron 230, and the length of L determines the opening of the stop valve.

[0137] Figure 8a The working principle diagram of the prior art stop valve static iron is disclosed, as shown in Figure 8a ​As shown, there is a magnetic induction line 340 between the static iron 310 and the valve rod 320. In order to ensure that the gap 330 between the static iron 310 and the valve rod 320 is large, the magnetic resistance is large, and thus a larger electromagnetic force is required to move the valve rod 320 upward.

[0138] Figure 8b A schematic diagram of the electromagnetic force of the moving iron static iron according to an embodiment of the application is disclosed, as shown in Figure 8b As shown, the stop valve provided by the application has a radial gap of 0-1mm between the static iron 280 and the moving iron 230 in the static iron cavity, so that the moving iron 230 and the static iron 280 are radially overlapped and the gap 292 is small, the magnetic resistance is small, and there is a magnetic induction line 291 between the moving iron 230 and the static iron 280, and thus a small electromagnetic force is required. The electromagnetic force is small, and thus the required current is small, and electricity is saved.

[0139] Due to the existence of the static iron 280 cavity, the opening of the moving iron 230 can be larger, thereby reducing the flow resistance and improving the efficiency of the thermal management system. At the same time, compared with the prior art CN1330901C which needs two upper and lower lock sleeves and two springs to achieve self-locking, the application can use one less lock sleeve and one less spring by integrating the upper lock sleeve function on the static iron, thereby greatly reducing the cost of parts.

[0140] Figure 9a A schematic diagram of the principle of the end surface inclination angle of the stop sleeve according to an embodiment of the application is disclosed, as shown in Figure 9b A schematic diagram of the V-shaped groove and rectangular groove of the end surface of the stop sleeve according to an embodiment of the application is disclosed, as shown in Figure 9a and Figure 9b As shown, the stop sleeve 250 is provided with an end surface serrated V-shaped groove 251 and a side surface rectangular groove 252 structure.

[0141] The V-shaped groove 251 is used to limit the limit block 231 of the downward moving moving iron 230;

[0142] The rectangular groove 252 is arranged at intervals with the V-shaped groove 251;

[0143] The rectangular groove 252 is used to further move the moving iron 230 to the No. 1 position when the stop valve is switched from opening to closing, so that the spring force pushes the moving iron 230 and the valve needle 220 to the sealing surface of the valve seat 210, achieving the effect of closing the valve.

[0144] The number of V-shaped grooves 251 and rectangular grooves 252 is equal;

[0145] The V-shaped grooves 251 and the rectangular grooves 252 are arranged at intervals with each other.

[0146] The inclination angle θ of the V-shaped groove 251 satisfies the following expression to enable the moving iron to slide downward:

[0147] θ > arctan μ;

[0148] Wherein, μ is the friction coefficient of the material.

[0149] As a preferred embodiment, the inclination angle θ is 30 degrees in this embodiment.

[0150] Figure 10 A phase angle diagram of the cut-off sleeve according to an embodiment of the present application is disclosed, as shown in Figure 10 The V-shaped groove 251 of the cut-off sleeve 250 and the static iron 280 maintain a certain phase angle δ, and the expression corresponding to the phase angle δ is:

[0151]

[0152] Wherein, Δh = h0-h, h0 is the height from the lower stop position of the moving iron to the V-shaped groove of the static iron, h is the height from the lower stop position of the moving iron to the moment of just contacting the inclined surface of the static iron, r is the inner diameter of the static iron, and θ is the inclination angle.

[0153] As a preferred embodiment, the δ is 15 degrees in this embodiment.

[0154] The number of V-shaped grooves 251 is ≥1, and the number of V-shaped grooves in this embodiment is 6 as a preferred embodiment.

[0155] The number of rectangular grooves 252 is ≥1, and the number of rectangular grooves in this embodiment is 6 as a preferred embodiment.

[0156] The number of V-shaped grooves of the cut-off sleeve plus the number of rectangular grooves is equal to the number of V-shaped grooves of the static iron.

[0157] Figure 11 A cross-sectional view of the moving iron according to an embodiment of the present application is disclosed, as shown in Figure 5 and Figure 11 The moving iron 230 is provided with a circumferential limiting block 231.

[0158] The number of limiting blocks 231 is ≥2, and the number of limiting blocks 231 in this embodiment is 6.

[0159] The width of the limiting block 231 is smaller than the width of the rectangular groove 252 of the cut-off sleeve, the number of limiting blocks 231 corresponds to the number of rectangular grooves 252, and the distribution position of the limiting block 231 on the moving iron 230 should match the distribution position of the rectangular groove 252, so that the limiting block 231 can accurately enter the rectangular groove 252 when the cut-off valve is normally closed.

[0160] The limiting block 231 can be designed as one body with the moving iron 230 or as a separate body.

[0161] Wherein, the head diameter φ1 of the moving iron 230 is smaller than the inner diameter of the accommodating cavity of the static iron 280, and the diameter φ2 of the circumscribed circle of the outer contour of the limiting block 231 is greater than the inner diameter of the accommodating cavity of the static iron 280.

[0162] The application provides a stop valve, which is based on an existing stop valve electromagnetic module, changes the self structure design of a moving iron and a static iron, and introduces a stop sleeve structure, and thus, compared with the prior art CN1330901C, one lock sleeve and a spring are saved, the structure is simple, and the part cost is low.

[0163] The stop valve has the following beneficial effects.

[0164] 1) saving electric energy: compared with a traditional stop valve, the application realizes mechanical limiting through the specific V-shaped groove and rectangular groove of the moving iron circumferential limiting block and the stop sleeve and the spring effect, does not need to maintain the valve opening or closing state under the condition of long-time power-on, and improves the vehicle mileage.

[0165] 2) low noise: compared with the prior art, the moving iron does not collide with the inner top surface of the static iron in the static iron cavity during upward movement, only the moving iron limiting block and the inclined surface of the static iron are in contact, the stress area is small, and the impact noise is lower.

[0166] 3) low flow resistance and high thermal management efficiency: since the magnetic circuit gap between the moving iron and the static iron is small, the magnetic resistance is low, so under the condition of the same current size, the moving distance of the moving iron is larger, that is, the opening is larger, so that the flow resistance can be reduced and the thermal management efficiency can be improved.

[0167] 4) low cost: compared with the prior art CN1330901C, one spring and lock sleeve are saved in the design, and the use cost of parts is greatly reduced.

[0168] Although the above methods are illustrated and described as a series of actions for the purpose of simplifying the explanation, it should be understood and appreciated that the methods are not limited by the order of actions, because according to one or more embodiments, some actions can occur in different orders and / or concurrently with other actions from the illustrated and described actions or other actions that can be understood by those skilled in the art but are not illustrated and described herein.

[0169] As shown in the application and claims, unless the context clearly indicates otherwise, "one", "a", "an", and / or "the" do not refer to the singular, but can also include the plural. Generally, the terms "comprise" and "include" only indicate the inclusion of the steps and elements explicitly identified, and these steps and elements do not constitute an exclusive list, and the method or device can also include other steps or elements.

[0170] In the description of the present application, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0171] In the present application, unless otherwise explicitly specified and limited, "on" or "under" of a first feature to a second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "over" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. "Under", "below" and "under" of the first feature to the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0172] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0173] The above embodiments are provided to those skilled in the art to implement or use the present application, and those skilled in the art can make various modifications or changes to the above embodiments without departing from the inventive concept of the present application, therefore the protection scope of the present application is not limited by the above embodiments, but should be the maximum scope of the innovative features mentioned in the claims.

Claims

1. A shut-off valve, comprising an electromagnetic coil, a stationary iron, a moving iron, a valve needle, and a valve seat, wherein a spring is disposed between the stationary iron and the moving iron, one end of the valve needle is fixedly connected to the moving iron, and the other end is disposed opposite to the valve seat, characterized in that: The moving iron is provided with a limiting block in the circumferential direction; The stationary iron has a limiting component fixedly connected to one end near the moving iron. The end face is provided with a sawtooth-shaped V-groove with an inclination angle θ satisfying θ>arctanμ, where μ is the material friction coefficient. The limiting component has a sawtooth-shaped V-groove with an inclination angle θ satisfying θ>arctanμ on its end face, and an axial limiting groove spaced apart from the V-groove on its side. The V-groove and axial limiting groove of the limiting component are used to limit the moving iron limiting block. By using the electromagnetic force of the electromagnetic coil and the spring force, the moving iron limit block is moved through the V-groove of the stationary iron to the corresponding limit position of the V-groove or axial limit groove of the limit component, thereby achieving mechanical limiting of the valve needle and valve seat.

2. The shut-off valve according to claim 1, characterized in that, The moving iron is provided with a plurality of limiting blocks in its circumferential direction, and the plurality of limiting blocks are symmetrically distributed.

3. The shut-off valve according to claim 1, characterized in that, The width of the limiting block of the moving iron is smaller than the width of the axial limiting groove; The number of the limiting blocks corresponds to the number of the axial limiting grooves; The distribution positions of the limiting blocks match the distribution positions of the axial limiting grooves.

4. The shut-off valve according to claim 1, characterized in that, The stationary iron has a cavity of a certain length L, and the head of the moving iron is located inside the cavity of the stationary iron.

5. The shut-off valve according to claim 4, characterized in that, The moving iron and stationary iron cavities must maintain a certain overlap length L0; Where L0 = L - L1, L is the length of the stationary iron cavity, and L1 is the extension length of the spring.

6. The shut-off valve according to claim 5, characterized in that, Within the stationary iron cavity, the radial gap between the stationary iron and the moving iron is 0–1 mm.

7. The shut-off valve according to claim 4, characterized in that, The head diameter φ1 of the moving iron is smaller than the inner diameter of the stationary iron cavity; The diameter φ2 of the outer tangent circle of the limiting block is greater than the inner diameter of the stationary iron cavity.

8. The shut-off valve according to claim 1, characterized in that, The tilt angle θ is 30 degrees.

9. The shut-off valve according to claim 1, characterized in that, The stationary iron has at least two V-grooves; The limiting component has at least one V-groove; The limiting component has at least one axial limiting groove; The number of V-grooves in the limiting component plus the number of axial limiting grooves equals the number of V-grooves in the stationary iron.

10. The shut-off valve according to claim 1, characterized in that, A specific phase angle δ is maintained between the specific sawtooth-shaped V-groove of the stationary iron and the specific sawtooth-shaped V-groove of the limiting component; The specific phase angle δ satisfies the following expression: Where Δh=h0-h, h0 is the height from the lower stop of the moving iron to the V-groove of the stationary iron, h is the height when the lower stop of the moving iron just contacts the inclined surface of the stationary iron, r is the inner diameter of the stationary iron, and θ is the inclination angle of the V-groove of the stationary iron.

11. The shut-off valve according to claim 10, characterized in that, The specific phase angle δ is 15 degrees, and the number of V-grooves and axial limiting grooves of the limiting component are 6 each.

12. The shut-off valve according to claim 1, characterized in that, The shut-off valve also includes a connecting ring for fixing the limiting component and the stationary iron, and the electromagnetic coil is fixedly sleeved on the outside of the connecting ring.

13. The shut-off valve according to claim 1, characterized in that, Both the stationary iron and the moving iron are made of magnetically conductive materials.

14. The shut-off valve according to claim 13, characterized in that, Both the stationary and moving iron are made of magnetically conductive stainless steel.

15. The shut-off valve according to claim 1, characterized in that, When the shut-off valve switches from the closed to the open state, the moving iron limit block is at the bottom of the axial limit groove, and the valve needle is in sealing contact with the valve seat. When the electromagnetic coil is energized, the moving iron moves up to the sawtooth inclined surface of the stationary iron and slides along the inclined surface to the V-groove position of the stationary iron. The valve needle disengages from the valve seat, and the shut-off valve opens. After the electromagnetic coil is de-energized, the moving iron moves downward under the action of the spring force to the sawtooth inclined surface of the limiting component, and then slides along the inclined surface of the limiting component to the V-groove position of the limiting component, and the shut-off valve remains open.

16. The shut-off valve according to claim 1, characterized in that, When the shut-off valve switches from open to closed, the moving iron limit block is in the V-groove position of the limit component, and the valve needle and valve seat maintain an opening degree s, where the opening degree s is the height difference between the moving iron limit block in the V-groove position of the limit component and the bottom of the axial limit groove. After the electromagnetic coil is energized, the moving iron moves up to the sawtooth inclined surface of the stationary iron and then slides along the inclined surface to the V-groove position of the stationary iron. After the electromagnetic coil is de-energized, the moving iron moves downward under the action of the spring force to the sawtooth inclined surface of the limiting component, and then slides along the inclined surface of the limiting component to the bottom of the axial limiting groove of the limiting component. The valve needle contacts the valve seat and seals, and the shut-off valve is in the closed state.

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