阅读说明：本技术 一种电子截止阀 (Electronic stop valve ) 是由 蒋开洪 段小成 张紫星 张科迪 王晨 于 2020-05-29 设计创作，主要内容包括：本发明公开了一种电子截止阀,包括阀座和阀芯口组件,阀座的侧壁镂空且下端为阀口,阀芯口组件设置在阀座内部封住阀口,阀座的上端连接有螺母组件,螺母组件的上端安装有线圈部件,螺母组件的中心设置有上下升降的动铁组件,阀芯的上端面内凹形成平衡腔,阀芯的中部设置有上下贯通的第一平衡流道,动铁组件的下端将第一平衡流道的上端封堵,阀芯上还设置有连通阀芯上下的辅助平衡流道,动铁组件包括动铁芯和设置在动铁芯内部上下升降的动铁密封件,动铁芯的侧壁上开有与内腔相连通的侧流道。本发明具有用于平衡压力的平衡腔,可以减小开、闭阀所需的电磁力,减小能耗,使阀芯动作更快捷。(The invention discloses an electronic stop valve, which comprises a valve seat and a valve core port assembly, wherein the side wall of the valve seat is hollow, the lower end of the valve seat is a valve port, the valve core port assembly is arranged in the valve seat to seal the valve port, the upper end of the valve seat is connected with a nut assembly, the upper end of the nut assembly is provided with a coil assembly, the center of the nut assembly is provided with a movable iron assembly which can lift up and down, the upper end of a valve core is inwards concave to form a balance cavity, the middle part of the valve core is provided with a first balance flow channel which is communicated up and down, the lower end of the movable iron assembly seals the upper end of the first balance flow channel, the valve core is also provided with an auxiliary balance flow channel which is communicated with the valve core up and down, the movable iron assembly comprises a movable. The invention has the balance cavity for balancing pressure, can reduce the electromagnetic force required by opening and closing the valve, reduces energy consumption and ensures that the valve core moves more quickly.)

1. An electronic stop valve comprises a valve seat (7) and a valve core port assembly (6), wherein the side wall of the valve seat (7) is hollowed, the lower end of the valve seat is a valve port (9), the valve core port assembly (6) is arranged inside the valve seat (7) to seal the valve port (9), the electronic stop valve is characterized in that the upper end of the valve seat (7) is connected with a nut assembly (2), the upper end of the nut assembly (2) is provided with a coil assembly (1), the center of the nut assembly (2) is provided with a moving iron assembly (3) which can be lifted up and down, the upper end of the moving iron assembly (3) is provided with a first spring (23), the valve core port assembly (6) comprises a valve core (61) and a second spring (5) arranged on the outer side of the valve core (61), the upper end face of the valve core (61) is recessed to form a balance cavity (C), the middle part of the valve core (61) is provided with a first balance flow, the lower end of the movable iron assembly (3) seals the upper end of a first balance flow channel (61B), the valve core (61) is further provided with an auxiliary balance flow channel communicated with the valve core (61) from top to bottom, the movable iron assembly (3) comprises a movable iron core (31) and a movable iron sealing piece (33) arranged in an inner cavity at the lower part of the movable iron core (31) and capable of lifting up and down, the upper end of the movable iron sealing piece (33) is connected with a third spring (32), and a side flow channel (31A) communicated with the inner cavity is formed in the side wall of the movable iron core (31).

2. The electronic cutoff valve according to claim 1, wherein: the coil component (1) comprises a coil shell (121), a coil (122) arranged in the coil shell (121), a yoke (13) arranged on the outer side of the coil shell (121) and a framework (124) arranged in the coil (122), wherein a Pin needle buckle (123) is fixed on the framework (124), and a transient voltage suppression diode (125) is installed on the Pin needle buckle (123).

3. The electronic cutoff valve according to claim 1, wherein: the auxiliary balance flow passage comprises at least one second balance flow passage (61A) arranged on the valve core (61) and a gap formed between the valve seat (7) and the valve core (61).

4. The electronic cutoff valve according to claim 1, wherein: the coil component (1) is characterized in that the nut component (2) comprises a nut seat (24) connected with the valve seat (7) and a nut pipe (22) arranged in the middle of the nut seat (24) and inserted into the coil component (1), a fixed iron nut (21) is axially inserted into the upper end of the nut pipe (22), the moving iron component (3) is lifted in the nut pipe (22), and the lower end of the fixed iron nut (21) is connected with the moving iron component (3) through a first spring (23).

5. The electronic cutoff valve according to claim 1, wherein: a piston ring (62) is embedded in the outer side wall of the valve core (61), and a spring wire (62a) is installed inside the piston ring (62).

6. The electronic cutoff valve according to claim 1, wherein: the lower end of the valve core (61) is embedded with a sealing gasket (63), the lower end of the sealing gasket (63) is limited and fixed through a limiting block (64), and a lower opening flanging part (61C) for axially fixing the limiting block (64) is arranged at the lower end of the valve core (61) or the valve core (61) and the limiting block (64) are in interference fit.

7. The electronic cutoff valve according to claim 1, wherein: the lower end of the movable iron core (31) is embedded with a limiting pad (34) for limiting a movable iron sealing element (33), and the end part of the lower end of the movable iron core (31) is provided with a flanging part (31B) for axially fixing the limiting pad (34).

8. The electronic cutoff valve according to claim 1, wherein: and end surface grooves (65) for communicating the outer wall with the balance cavity (C) are formed in two sides of the upper end part of the valve core (61).

9. The electronic cutoff valve according to claim 3, wherein: the second balance flow passage (61A) is divided into an upper flow passage and a lower flow passage, the diameter of the upper flow passage is larger than that of the lower flow passage, the first balance flow passage (61B) is divided into an upper flow passage, a middle flow passage and a lower flow passage, and the diameter of the middle flow passage is larger than that of the upper flow passage and smaller than that of the lower flow passage.

10. The electronic cutoff valve according to claim 1, wherein: and sealing rings (4) are arranged between the nut component (2) and the valve seat (7), outside the valve seat (7) and outside the valve port (9).

Technical Field

The invention relates to the field of stop valves, in particular to an electronic stop valve which is suitable for a vehicle heat pump system, has long service life, simple structure, convenient installation and adjustable capacity and automatic opening and closing valve capacity.

Background

The stop valve is the most widely used forced sealing type valve, and the stop valve gradually develops towards modularization, energy conservation, intellectualization and modernization nowadays.

Once the valve core of the stop valve is opened, the valve seat of the stop valve is not contacted with the sealing surface of the valve core any more, so that the mechanical abrasion of the sealing surface is small, the sealing performance is good, and the service life is long. The stop valve has simple structure and is convenient to manufacture and maintain; the stop valve has small working stroke and short opening and closing time, and is suitable for occasions needing frequent opening and closing.

However, the pressure difference between the inlet and the outlet of the stop valve is large, the resistance of fluid medium is large, and the force required for opening and closing the valve is large; the existing stop valve can not control the flow and has poor regulation performance; and the commonly used stop valve is not suitable for a vehicle heat pump system, is easy to corrode and has short service life.

Disclosure of Invention

The invention provides an electronic stop valve which is provided with a balance cavity for balancing pressure, can reduce electromagnetic force required by opening and closing a valve, reduces energy consumption and enables a valve core to act more quickly.

In order to achieve the purpose, the invention provides the following technical scheme: an electronic stop valve comprises a valve seat and a valve core port assembly, wherein the side wall of the valve seat is hollow, the lower end of the valve seat is a valve port, the valve core port assembly is arranged in the valve seat to seal the valve port, the upper end of the valve seat is connected with a nut assembly, the upper end of the nut assembly is provided with a coil assembly, the center of the nut assembly is provided with a movable iron assembly which can move up and down, the upper end of the movable iron assembly is provided with a first spring, the valve core port assembly comprises a valve core and a second spring arranged on the outer side of the valve core, the upper end of the valve core is internally concave to form a balance cavity, the middle part of the valve core is provided with a first balance flow channel which is communicated up and down, the lower end of the movable iron assembly seals the upper end of the first balance flow channel, the valve core is also provided with an auxiliary balance flow channel communicated with the upper part and the lower part of the valve core, the movable iron assembly comprises a, the upper end of the movable iron sealing element is connected with a third spring, and a side runner communicated with the inner cavity is formed in the side wall of the movable iron core.

Preferably, the coil component comprises a coil housing, a coil arranged in the coil housing, a yoke arranged outside the coil housing, and a framework arranged in the coil, wherein a Pin buckle is fixed on the framework, one end of the Pin buckle is connected with the coil, the other end of the Pin buckle is externally connected with a connector, so that the Pin buckle is electrically connected with an external signal, a transient voltage suppression diode (TVS) is arranged on the Pin buckle, the transient voltage suppression diode (TVS) plays a role in protecting the coil, and the coil is prevented from being damaged due to overlarge instantaneous voltage in the coil.

Preferably, the auxiliary balance flow passage includes at least one second balance flow passage opened in the valve body and a gap formed between the valve seat and the valve body.

Preferably, the nut assembly comprises a nut seat connected with the valve seat and a nut tube arranged in the middle of the nut seat and inserted into the coil assembly, a fixed iron nut is axially inserted into the upper end of the nut tube, the moving iron assembly ascends and descends in the nut tube, the lower end of the fixed iron nut is connected with the moving iron assembly through a first spring, the fixed iron nut and the nut tube are welded and fixed, and the nut tube and the nut seat are also welded and connected.

Preferably, a piston ring is embedded in the outer side wall of the valve core, a spring wire is installed in the piston ring, and the piston ring is in contact with the inner wall of the nut seat so as to be axially and hermetically installed with the nut seat.

Preferably, the lower extreme embedding of case install sealed the pad, the lower extreme of sealed pad carry on spacingly through the stopper, the lower extreme of case be provided with stopper axial fixity's end opening turn-ups portion (perhaps interference tight fit is fixed), sealed pad adopts the PTFE material to make to increase the sealed effect and the life of stop valve, the effect of stopper is to prevent that end opening turn-ups portion from damaging sealed pad when carrying out the turn-ups and handling, influences sealed effect.

Preferably, the lower extreme embedding of moving the iron core be provided with the spacing pad that will move the indisputable sealing member, the lower extreme tip of moving the iron core be provided with spacing pad axial fixity's turn-ups portion, spacing pad's effect prevents that turn-ups portion from carrying out the turn-ups when handling, harms moving indisputable sealing member, influences sealed effect, trompil so that move indisputable sealing member and case mouth subassembly contact (can also realize through interference tight fit) in the middle of the spacing pad simultaneously.

Preferably, end surface grooves communicated with the outer wall and the balance cavity are arranged on two sides of the upper end part of the valve core so as to balance pressure and reduce resistance when the valve core port assembly moves.

Preferably, the second balance flow channel is divided into an upper flow channel and a lower flow channel, the diameter of the upper flow channel is larger than that of the lower flow channel, so that throttling is prevented, the flow is prevented from being influenced, and the wall and the flow channel are damaged; the first balance flow passage is divided into an upper flow passage, a middle flow passage and a lower flow passage, wherein the diameter of the middle flow passage is larger than that of the upper flow passage and smaller than that of the lower flow passage, so that secondary throttling is prevented.

Preferably, sealing rings are arranged between the nut component and the valve seat, outside the valve seat and outside the valve port.

Compared with the prior art, the invention has the beneficial effects that:

1. the balance cavity capable of balancing the pressure difference between the upper part and the lower part of the valve port is arranged, so that the electromagnetic force required by opening and closing the valve can be reduced, the energy consumption is reduced, and the valve core can move more quickly;

2. the electromagnetic force can be controlled by controlling the current passing through the coil so as to control the opening of the valve port and further control the flow;

3. the structure integrated level is high, and the part is few, and the equipment is more convenient, is favorable to the lightweight, and the cost is more advantageous.

Drawings

FIG. 1 is a schematic front view of an exploded structure of the present invention;

FIG. 2 is a perspective view of a coil component according to the present invention;

FIG. 3 is an exploded perspective view of the coil component of the present invention;

FIG. 4 is a front half cross-sectional view of the nut assembly of the present invention;

FIG. 5 is a front view, half section, block diagram of the moving iron assembly of the present invention;

FIG. 6 is a schematic structural view of the lower end of the moving iron assembly of the present invention after being flanged;

FIG. 7 is a schematic view in front half section of the valve cartridge of the present invention;

FIG. 8 is a schematic view of the valve cartridge of the present invention after flanging;

FIG. 9 is a schematic illustration of the present invention when not in operation;

fig. 10 is a schematic view of the present invention in operation.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-10, the present invention provides an electronic stop valve, including a valve seat 7 and a spool port assembly 6, a side wall of the valve seat 7 is hollowed, and a lower end of the valve seat is a valve port 9, the spool port assembly 6 is disposed inside the valve seat 7 to seal the valve port 9, an upper end of the valve seat 7 is connected to a nut assembly 2, an upper end of the nut assembly 2 is mounted with a coil assembly 1, a moving iron assembly 3 that moves up and down is disposed at a center of the nut assembly 2, a first spring 23 is disposed at an upper end of the moving iron assembly 3, the spool port assembly 6 includes a spool 61 and a second spring 5 disposed outside the spool 61, an upper end surface of the spool 61 is recessed to form a balance chamber C, a first balance flow passage 61B that penetrates up and down is disposed in a middle portion of the spool 61, a lower end of the moving iron assembly 3 seals an upper end of the first balance flow passage 61B, the valve core 61 is also provided with an auxiliary balance flow passage which is communicated with the valve core 61 up and down, the moving iron assembly 3 comprises a moving iron core 31 and a moving iron sealing piece 33 which is arranged in an inner cavity at the lower part of the moving iron core 31 and can lift up and down, the upper end of the moving iron sealing piece 33 is connected with a third spring 32, and the side wall of the moving iron core 31 is provided with a side flow passage 31A communicated with the inner cavity.

As shown in fig. 2-3, the coil component 1 includes a coil housing 121, a coil 122 disposed in the coil housing 121, a yoke 13 disposed outside the coil housing 121, and a bobbin 124 disposed in the coil 122, wherein a Pin latch 123 is fixed on the bobbin 124, one end of the Pin latch 123 is connected to the coil 122, and the other end is externally connected to a connector, so as to electrically connect the coil with an external signal, a screw 11 is mounted on the top of the coil component 1, and is used for connecting the coil housing 121, the yoke 13, and the bobbin 124, a transient voltage suppression diode 125 is mounted on the Pin latch 123, and the transient voltage suppression diode (TVS) plays a role in protecting the coil, and prevents the coil from being damaged due to an excessive transient voltage in the coil.

As shown in fig. 4, the nut assembly 2 includes a nut seat 24 connected to the valve seat 7 and a nut tube 22 disposed in the middle of the nut seat 24 and inserted into the coil assembly 1, a fixed iron nut 21 is axially inserted into an upper end of the nut tube 22, the movable iron assembly 3 is lifted and lowered in the nut tube 22, a lower end of the fixed iron nut 21 is connected to the movable iron assembly 3 through a first spring 23, the fixed iron nut 21 is welded and fixed to the nut tube 22, the nut tube 22 is also welded to the nut seat 24, and the nut tube 22 and the nut seat 24 are not integrally machined at this location. If the technology allows, the nut tube 22 and the nut seat 24 can be integrally processed, so that the processing steps are reduced, the processing cost is reduced, and the stress concentration at the welding position is eliminated.

As shown in fig. 7, a piston ring 62 is embedded in the outer side wall of the valve core 61, a spring wire 62a is installed inside the piston ring 62, and the piston ring 62 contacts with the inner wall of the nut seat 24 so as to be axially and hermetically installed with the nut seat 24. The lower end of the valve core 61 is embedded with a sealing gasket 63, the lower end of the sealing gasket 63 is limited by a limiting block 64, a lower opening flanging part 61C axially fixing the limiting block 64 is arranged at the lower end of the valve core 61, the sealing gasket 63 is made of PTFE materials so as to increase the sealing effect of the stop valve, and the limiting block 64 is used for preventing the lower opening flanging part 61C from damaging the sealing gasket 63 during flanging treatment to influence the sealing effect.

In order to fix the limit block 64, a structure without flanging can be adopted, and the limit block 64 and the valve core 61 are in interference fit to realize the connection and fixation of the limit block 64.

Two sides of the upper end part of the valve core 61 are provided with end surface grooves 65 communicating the outer wall and the balance cavity C so as to balance pressure and reduce resistance when the valve core port assembly 6 moves.

The second balance flow passage 61A is divided into an upper flow passage and a lower flow passage, the diameter of the upper flow passage is larger than that of the lower flow passage, so that throttling is prevented, the flow is prevented from being influenced, and the wall and the flow passages are damaged; the first balance flow passage 61B is divided into an upper flow passage, a middle flow passage and a lower flow passage, wherein the diameter of the middle flow passage is larger than that of the upper flow passage and smaller than that of the lower flow passage, so that secondary throttling is prevented.

As shown in fig. 5, a limiting pad 34 for limiting the moving iron sealing element 33 is embedded in the lower end of the moving iron core 31, a flanging portion 31B for axially fixing the limiting pad 34 is disposed at the end of the lower end of the moving iron core 31, the limiting pad 34 is used for preventing the moving iron sealing element 33 from being damaged when the flanging portion 31B is subjected to flanging treatment, so that the sealing effect is affected, and meanwhile, a hole is formed in the middle of the limiting pad 34 so that the moving iron sealing element 33 is in contact with the valve core opening assembly 6.

As shown in fig. 1, 8 and 9, the sealing rings 4 are mounted between the nut component 2 and the valve seat 7, outside the valve seat 7 and outside the valve port 9.

As shown in fig. 5, 7 and 9, before the electronic cut-off valve starts to work, the coil 122 is not electrified, no magnetic field is generated, no magnetic field force exists, and the moving iron assembly 3 does not move; the moving-iron seal 33 is pressed against the valve core 61 by the spring force of the third spring 32, and seals with the valve core 61, and the seal 63 of the valve core 61 is pressed against the valve seat 7 by gravity and the pressure difference of the fluid medium. At this time, the second spring 5 is compressed, and the fluid medium above the valve port 9 enters the balance chamber C through the flow passage 61A, and then enters the moving iron assembly through the side flow passage 31A, filling the upper chamber of the nut assembly 2.

As shown in fig. 5, 7 and 10, when the electronic cut-off valve starts to operate, the coil 122 is energized to form a magnetic field, a magnetic field force is generated to attract the moving-iron assembly 3, the moving-iron assembly 3 moves upwards, the magnetic field force is larger than the spring force generated by the first spring 23, and the first spring 23 is compressed; the moving iron seal 33 and the valve core 61 are not in contact seal any more, liquid in the balance cavity C enters the lower part of the valve port through the first balance flow channel 61B, medium fluid is communicated with the first balance flow channel 61B through the second balance flow channel 61A, the balance cavity C and the first balance flow channel 61B, the pressure difference in the upper direction and the lower direction of the valve port 9 is reduced, when the pressure difference is reduced to be less than the pressure difference to offset the spring force of the second spring 5, the valve core 61 moves upwards, the sealing gasket 63 on the valve core 61 is not in contact seal with the valve seat 7, and.

The external signal can control the current in the coil 122 to control the magnetic field force and the opening of the valve port.

When the electronic stop valve stops working, the coil 122 is not electrified, no magnetic field is generated, no magnetic field force exists, the moving iron assembly 3 moves downwards under the spring force of the first spring 23 and is in contact with the valve core 61, and the first balance flow channel 61B is closed; the valve core 61 moves downward against the spring force of the second spring 5 under the action of the pressure difference and the gravity, contacts the valve seat 7, the valve port is closed, and the second spring 5 is compressed.

While the invention has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the various features of the embodiments disclosed herein may be used in any combination, provided that there is no structural conflict, and the combinations are not exhaustively described in this specification merely for the sake of brevity and conservation of resources. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.