Solenoid stop valve

Abstract

The electromagnetic stop valve includes a valve body (10), a fixed core (20) and a movable core assembly (30), the valve body (10) has an accommodation chamber (101), the valve body is further provided with a valve port (102), the valve port is connected to the accommodation chamber, the fixed core (20) is provided in the accommodation chamber, the movable core assembly (30) is movably provided in the accommodation chamber, the fixed core (20) and the movable core assembly (30) are distributed along the axial direction of the valve body, the second end of the movable core assembly (30) is provided corresponding to the valve port, and the fixed core can drive the movable core assembly to move, so that the second end of the movable core assembly seals or opens the valve port (102). This electromagnetic stop valve can solve the problem of low installation efficiency of the current.

Description

[Technical field]

[0001] This application claims priority to a patent application filed with the China National Intellectual Property Office on March 25, 2022, bearing application number 202210302020.9 and entitled "Solenoid stop valve and valve assembly having the same." This application claims priority to a patent application filed with the State Intellectual Property Office of China on March 25, 2022, bearing application number 202210302018.1 and entitled "Solenoid Stop Valve". This application claims priority to a patent application filed with the China National Intellectual Property Office on March 25, 2022, bearing application number 202210303329.X and entitled "Solenoid Valve."

[0002] The present application relates to the technical field of solenoid valves, and more particularly to solenoid stop valves. [Background technology]

[0003] Currently, conventional electromagnetic stop valves have many components, and during the installation process, multiple parts must be installed inside the accommodating chamber and then adjusted and fixed, which increases the time required to install the device and reduces the installation efficiency of the electromagnetic stop valve. Summary of the Invention

[0004] The present application provides an electromagnetic stop valve to solve the problem of low installation efficiency of the electromagnetic stop valve in the prior art.

[0005] According to one aspect of the present application, there is provided an electromagnetic stop valve including a valve body, a fixed core and a movable core assembly, the valve body having an accommodating chamber, the valve body further having a valve port which communicates with the accommodating chamber, the fixed core being disposed within the accommodating chamber, the movable core assembly being movably disposed within the accommodating chamber, the fixed core and the movable core assembly being distributed along the axial direction of the valve body, the movable core assembly having a second end which is disposed corresponding to the valve port, and the fixed core being capable of driving and moving the movable core assembly so that the second end of the movable core assembly seals or opens the valve port.

[0006] When the technical aspects of the present application are applied, during the installation process of the device, the usage requirements of the device can be met simply by arranging one end of the movable core assembly corresponding to the fixed core and the other end of the movable core assembly corresponding to the valve port. By providing the above structure, not only can the installation of the device be made easier, but the installation efficiency of the device can also be effectively improved.

[0007] Furthermore, the end face of the second end of the movable core assembly is flat, and when the movable core assembly seals the valve port, the end face of the second end of the movable core assembly abuts against the end face of the valve port. In this way, when the second end of the movable core assembly abuts against the valve port, the valve port can restrict the second end of the movable core assembly to prevent the second end of the core from displacing in the axial direction, and since both end faces have flat structures, the contact area between the two is increased, making the contact between the two more stable, and accordingly improving the restricting effect of the valve port on the second end of the movable core assembly.

[0008] Furthermore, the valve body includes a body and a valve seat, the body has a mounting hole, the valve seat is connected to the body and is located in the mounting hole, and the valve seat has a valve port. The above arrangement makes it easier to install and remove the device, and reduces the difficulty of installing and removing the device, while providing the valve seat in the mounting hole is advantageous in reducing the volume of the entire device, thereby realizing the miniaturization of the device.

[0009] Furthermore, an end face of the valve seat close to the movable core assembly is lower than an end face of the mounting hole close to the movable core assembly, and the solenoid stop valve further includes a first sealing member, the first sealing member is disposed between the movable core assembly and the mounting hole, and the first sealing member is disposed surrounding the outer periphery of the second end of the movable core assembly. By providing the above structure, the first sealing member can seal the connection point between the second end of the movable core assembly and the valve port, thereby realizing radial sealing of the connection point between the second end of the movable core assembly and the valve port, thereby effectively reducing internal leakage of the device and improving the sealing effect of the device.

[0010] Furthermore, the movable core assembly has a first balancing passage, and the first balancing passage penetrates the first end and the second end of the movable core assembly. In this way, when the medium enters the inside of the movable core assembly, it enters the first end of the movable core assembly through the first balancing passage, and effectively balances the pressure difference between the first end and the second end of the movable core assembly, thereby ensuring the stability of the device during operation.

[0011] Furthermore, the first balancing passage includes a first hole segment, a second hole segment and a third hole segment connected in sequence, the third hole segment is arranged close to the valve orifice, the diameter of the third hole segment is larger than that of the first hole segment, and the diameter of the first hole segment is larger than that of the second hole segment. By providing the above structure, the first hole segment and the second hole segment are arranged in a stepped manner, which is favorable to meet the installation requirements of the device, the diameter of the third hole segment is larger than that of the first hole segment and the second hole segment, which can realize the large-diameter internal balancing function of the device, and at the same time, the inner diameter dimension of the third hole segment can be adjusted according to the flow requirement of the valve orifice, which can improve the applicability of the device and widen the scope of use of the device.

[0012] In addition, the fixed core is provided at one end of the receiving chamber away from the valve port, and the movable core assembly is located at one end of the fixed core close to the valve port. By providing the above structure, when the device is stationary, the movable core assembly can seal the valve port, in which case the valve port is in a sealed state, thereby fulfilling the normally closed function of the valve port of the device.

[0013] Furthermore, the electromagnetic stop valve further includes a first elastic member, the first elastic member is disposed between the fixed core and the movable core assembly, one end of the first elastic member is connected to the fixed core, the other end of the first elastic member is connected to the movable core assembly and located within the first hole segment, so that the elastic force of the first elastic member can act on the movable core assembly together with the gravity of the movable core assembly itself, so that the movable core assembly is in a position to seal the valve port, thereby realizing the sealing function of the movable core assembly.

[0014] In addition, the electromagnetic stop valve further includes a second sealing member, which is provided on the outer wall of the movable core assembly and located in the middle of the movable core assembly, and the second sealing member can be engaged with the side wall of the receiving chamber to seal it. The second sealing member is used to seal the connection point between the receiving chamber and the movable core assembly to prevent the medium from leaking at this point, thereby further improving the sealing effect of the device. [Brief description of the drawings]

[0015] The drawings in the specification that form a part of this application are intended to provide a further understanding of the application, and the schematic examples and their explanations are intended to interpret the application and are not intended to unduly limit the application.

[0016] [Figure 1] 1 shows a structural schematic diagram of an electromagnetic stop valve provided in Example 1 of the present application. [Diagram 2] 1 shows a structural schematic diagram of an electromagnetic stop valve provided by Example 2 of the present application. [Diagram 3]FIG. 13 is a cross-sectional view of an electromagnetic stop valve provided according to a third embodiment of the present application when the movable core is in an initial position. [Figure 4] FIG. 13 is a schematic diagram of the position structure of the electromagnetic stop valve according to the third embodiment of the present application when the movable core is in an engaged position; [Diagram 5] 13 shows a structural schematic diagram of the electromagnetic stop valve provided in the third embodiment of the present application when the magnetic part of the movable iron core and the valve core are in close contact with each other.

[0017] Here, the above drawings include the following reference numbers: 10 valve body, 101 accommodation chamber, 102 valve port, 103 flow hole, 11 main body, 111 first chamber, 12 Valve seat, 13 sleeve, 131 second chamber, 20 fixed core, 21 fourth hole segment, 22 fifth hole segment, 23 sixth hole segment, 30 moving core assembly, 301 first hole segment, 302 second hole segment, 303 third hole segment, 41 first sealing member, 42 first elastic member, 43 second sealing member, 50 movable core, 501: Restriction portion; 502: Third balancing passage; 503: Second balancing hole; 51 magnetic part, 52 engagement part, 60 valve core, 61 first segment, 62 second segment, 63 first through hole, 64 second through hole, 65 1st distribution aisle, 66 2nd distribution aisle, 601 first insertion hole, 602 second insertion hole, 603 fifth sealing member, 604 sixth sealing member, 611 third segment, 612 fourth segment, 613 fifth segment, 614 protrusion, 71 second elastic member, 72 third sealing member, 73 fourth sealing member, 80 coils, 91 Cushioning member, 92 Return member. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, the technical aspects of the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, but it is clear that the described embodiments are merely some of the embodiments of the present application, and not all of the embodiments. The following description of at least one exemplary embodiment is actually merely explanatory, and does not impose any restrictions on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the scope of protection of the present application.

[0019] As shown in Fig. 1, the first embodiment of the present application provides an electromagnetic stop valve including a valve body 10, a fixed core 20 and a movable core assembly 30. Here, the valve body 10 has an accommodating chamber 101, the valve body 10 is further provided with a valve port 102, the valve port 102 communicates with the accommodating chamber 101, the fixed core 20 is provided in the accommodating chamber 101, the movable core assembly 30 is movably provided in the accommodating chamber 101, the fixed core 20 and the movable core assembly 30 are distributed along the axial direction of the valve body 10, the movable core assembly 30 has a first end and a second end provided opposite to each other, the first end of the movable core assembly 30 is provided corresponding to the fixed core 20, the second end of the movable core assembly 30 is provided corresponding to the valve port 102, and the fixed core 20 can drive the movable core assembly 30 to move, so that the second end of the movable core assembly 30 seals or opens the valve port 102.

[0020] By applying the technical aspects of the present application, in the installation process of the device, the requirements for use of the device can be met simply by locating one end of the movable core assembly 30 corresponding to the fixed core 20 and the other end of the movable core assembly 30 corresponding to the valve port 102. The provision of the above structure not only makes it easier to install the device, but also effectively improves the installation efficiency of the device.

[0021] Here, the movable core assembly 30 may have an integrally molded structure or a separate structure. In this embodiment, the movable core assembly 30 has an integrally molded structure. Specifically, when the valve core and the movable core are integrally molded, the processing of the device components is facilitated, reducing the processing costs of the device. The integrally molded structure also makes it possible to avoid problems with poor coaxiality of multiple components caused by processing and installation errors, and improves the coaxiality between the movable core assembly 30 and the valve body 10, making the opening and closing operations of the device smoother.

[0022] Furthermore, the end face of the second end of the movable core assembly 30 is flat, and when the movable core assembly 30 seals the valve port 102, the end face of the second end of the movable core assembly 30 abuts against the end face of the valve port 102. In this way, when the second end of the movable core assembly 30 abuts against the valve port 102, the valve port 102 can restrict the second end of the movable core assembly 30 and prevent the second end of the movable core assembly 30 from displacing in the axial direction, and since both end faces have a flat structure, the contact area between the two is increased, making the contact between the two more stable, thereby improving the restricting effect of the valve port 102 on the second end of the movable core assembly 30, and also improving the sealing effect of the second end of the movable core assembly 30 on the valve port 102.

[0023] In another embodiment of the present application, the end of the second end of the movable core assembly 30 may be a protruding structure, and the side wall of the protruding structure may be a tapered surface, which can improve the applicability of the device and is advantageous for meeting the usage requirements of the device in different environments.

[0024] Here, in the embodiment of the present application, the cross-sectional area of ​​the end face of the second end of the movable core assembly 30 is larger than the cross-sectional area of ​​the end face of the valve port 102, thereby further ensuring the stability when the two come into contact, while at the same time ensuring the sealing effect of the device, and ensuring the stability of the device during operation as much as possible.

[0025] Specifically, the valve body 10 includes a body 11 and a valve seat 12 arranged in order along the axial direction, the body 11 having a mounting hole, the valve seat 12 connected to the body 11 and located within the mounting hole, and the valve seat 12 having a valve port 102. The above-mentioned installation makes it easier to attach and detach the device, reducing the difficulty of attaching and detaching the device, and at the same time, providing the valve seat 12 within the mounting hole is advantageous in shortening the axial and radial lengths of the device, thereby effectively reducing the volume of the entire device and realizing a compact device.

[0026] Here, in the embodiment of the present application, the mounting hole structure is provided in a stepped shape, and the valve seat 12 is provided corresponding to the mounting hole structure. The above structure not only makes processing easier, but also makes it easier to install the device, thereby reducing manufacturing costs and further improving the installation efficiency of the device, thereby shortening the labor required to install the device.

[0027] Specifically, the fixed core 20 is provided at one end of the accommodating chamber 101 away from the valve port 102, and the movable core assembly 30 is located at one end of the fixed core 20 close to the valve port 102. By providing the above structure, when the device is stationary, the movable core assembly 30 can seal the valve port 102, in which case the valve port 102 is in a sealed state, thereby fulfilling the normally closed function of the valve port 102 of the device. Here, in the embodiment of the present application, when the device is operating, the fixed core 20 can generate a magnetic force against the movable core assembly 30 so that the movable core assembly 30 moves in a direction away from the valve port 102 along the axial direction, in which case the movable core assembly 30 is separated from the valve port 102 and the valve port 102 is in an open state, thereby realizing the valve opening function of the device.

[0028] Furthermore, the receiving chamber 101 includes a back pressure chamber and a flow chamber, a flow chamber is formed between the main body 11 and the movable core assembly 30, the valve port 102 is separated from the flow chamber, and when the movable core assembly 30 seals the valve port 102, the valve port 102 communicates with the back pressure chamber through the balancing passage. In this embodiment, the back pressure chamber includes the space between the movable core assembly 30 and the fixed core 20, and when the balancing passage is not provided, the back pressure chamber is a closed chamber, and the provision of the balancing passage can balance the pressure in the space away from the valve port 102 of the movable core assembly 30, i.e., between the back pressure chamber and the valve port 102, to ensure the smooth opening of the movable core assembly 30.

[0029] Furthermore, a flow hole 103 is provided on the side wall of the valve body 10, and the flow hole 103 communicates with the flow chamber. The electromagnetic stop valve further includes a second sealing member 43, which is provided on the outer wall of the movable core assembly 30 and located in the middle of the movable core assembly 30, and can engage with and seal the side wall of the receiving chamber 101, and is located on the side of the flow hole 103 away from the valve port 102 along the axial direction. The installation of the second sealing member 43 can realize the formation of a back pressure chamber and further improve the sealing effect of the device.

[0030] Specifically, the movable core assembly 30 has a balancing passage, which passes through a first end and a second end of the movable core assembly 30. In this way, when the device is operating, the balancing passage can communicate with the valve port 102, and thus, by connecting the space between the fixed core 20 and the movable core assembly 30 to the valve port 102 through the balancing passage, the pressures at both ends of the movable core assembly 30 can be made equal to ensure the stability of the device during operation.

[0031] Specifically, the balancing passage includes a first hole segment 301, a second hole segment 302 and a third hole segment 303 connected in sequence along the axial direction, and the third hole segment 303 is disposed close to the valve port 102, and the diameter of the third hole segment 303 is larger than that of the first hole segment 301, which is larger than that of the second hole segment 302. The provision of the above structure makes it easy to process the balancing passage and to distinguish the assembly direction of the movable core assembly 30. In addition, since the diameter of the third hole segment 303 is larger than that of the first hole segment 301 and the second hole segment 302, the large-diameter internal balancing function of the device can be realized; at the same time, the inner diameter dimension of the third hole segment 303 can be adjusted according to the flow requirement of the valve port 102, so that the applicability of the device can be improved and the scope of use of the device can be expanded.

[0032] Furthermore, the end face of the valve seat 12 at one end close to the movable core assembly 30 is lower than the end face of the mounting hole at one end close to the movable core assembly 30, and the electromagnetic stop valve further includes a first sealing member 41, which is provided between the movable core assembly 30 and the mounting hole, and the first sealing member 41 is provided surrounding the outer periphery of the second end of the movable core assembly 30. By providing the above structure, the first sealing member 41 can seal the connection point between the second end of the movable core assembly 30 and the valve port 102 to realize radial sealing of the connection point between the second end of the movable core assembly 30 and the valve port 102, and the radial sealing can increase the acting force between the movable core assembly 30 and the valve port 102, so as to improve the sealing ability of the device compared with the conventional axial sealing, thereby effectively reducing the internal leakage of the device and improving the sealing effect of the device.

[0033] In this embodiment, a ring-shaped groove is provided on the outer periphery of the second end of the movable core assembly 30, and the first sealing member 41 is provided in the ring-shaped groove. By providing the above structure, the installation and removal of the first sealing member 41 can be made easier, and at the same time, the above structure is also easy to process, thereby further reducing the manufacturing cost of the device.

[0034] In addition, the electromagnetic stop valve further includes a first elastic member 42, which is disposed between the fixed core 20 and the movable core assembly 30, one end of the first elastic member 42 is connected to the fixed core 20, and the other end of the first elastic member 42 is connected to the movable core assembly 30 and located within the first hole segment 301. In this manner, the elastic force of the first elastic member 42 can act on the movable core assembly 30 together with the gravity of the movable core assembly 30 itself, so that the movable core assembly 30 is in a position to seal the valve port 102, thereby improving the sealing effect of the movable core assembly 30. Here, the first elastic member 42 is specifically a return spring, which not only reduces the manufacturing cost, but also simplifies the structure and reduces the weight, which is advantageous for realizing the weight reduction of the device. Furthermore, by providing the first elastic member 42 within the first hole segment 301, the first hole segment 301 acts as a guide for the expansion and contraction of the first elastic member 42, thereby ensuring stability during the expansion and contraction process of the first elastic member 42.

[0035] When the technical aspects of the present application are applied, the movable core assembly 30 is made into an integrally molded structure, so that the movable core assembly 30 simultaneously functions as a movable core and a valve core. In the process of installing the device, it is only necessary to arrange one end of the movable core assembly 30 corresponding to the fixed core 20 and the other end of the movable core assembly 30 corresponding to the valve port 102, which can meet the requirements for use of the device. By providing the above structure, the installation of the device is not only made easier, but also the installation efficiency of the device can be effectively improved. At the same time, the design of the integral structure also makes it easier to process the parts of the device, and the processing cost of the device is reduced. At the same time, the fixed core 20 is provided at one end away from the valve port 102 of the accommodating chamber 101, and the movable core assembly 30 is provided at one end close to the valve port 102 of the fixed core 20. By providing the above structure, when the device is stationary, the movable core assembly 30 can seal the valve port 102, in which case the valve port 102 is in a sealed state, thereby fulfilling the normally closed function of the valve port 102 of the device.

[0036] 2, the second embodiment of the present application provides an electromagnetic stop valve including a valve body 10, a fixed core 20, and a movable core assembly 30. Here, the valve body 10 has a receiving chamber 101, one end of which is provided with a valve port 102, which communicates with the receiving chamber 101. The movable core assembly 30 includes a movable core 50 and a valve core 60, which are arranged in sequence along the axial direction. the valve core 60 has a first segment 61 and a second segment 62 arranged in a stepped shape, the first segment 61 of the valve core 60 is inserted and connected to the fixed core 20, the second segment 62 of the valve core 60 is arranged corresponding to the valve port 102 and opens or seals the valve port 102 by the second segment 62 of the valve core 60, the movable core 50 is located at one end of the fixed core 20 away from the valve port 102, the valve body 10 includes a body 11 and a valve seat 12, the body 11 has a mounting hole, the valve seat 12 is connected to the body 11 and is located in the mounting hole, the valve seat 12 has a valve port 102, the accommodating chamber 101 includes a back pressure chamber and a flow chamber, the valve port 102 is separated from the flow chamber, and a flow chamber is formed between the body 11 and the second segment 62, when the movable core seals the valve port 102, the valve port 102 communicates with the back pressure chamber through the balancing structure. In this way, the pressure between the back pressure chamber and the valve port 102 can be balanced to ensure smooth movement of the movable core assembly 30. The above-mentioned installation makes it easier to attach and detach the device, and reduces the difficulty of attaching and detaching the device. At the same time, the valve seat 12 is provided in the mounting hole, which is advantageous for reducing the volume of the entire device, thereby realizing miniaturization of the device. Here, in the embodiment of the present application, the mounting hole structure is provided in a stepped shape, and the valve seat 12 is provided corresponding to the mounting hole structure. The above-mentioned structure not only makes it easy to process, but also makes it easy to attach the device, thereby reducing the manufacturing cost and further improving the installation efficiency of the device, and shortening the installation man-hours of the device.

[0037] Specifically, the balancing structure includes a balancing passage and a balancing hole communicating with each other, the valve core 60 has a balancing passage and a balancing hole communicating with each other, the balancing passage penetrates the valve core 60 along the axial direction, the balancing hole is provided in the first segment 61 of the valve core 60, and one end of the balancing hole is located in the side wall of the valve core 60. Here, in the embodiment of the present application, the balancing hole is provided in the valve core 60 along the radial direction, but of course it may be provided at other angles with the first segment 61 of the valve core 60, specifically according to the actual use requirements of the device, so as to improve the applicability of the device.

[0038] By applying the technical aspects of the present application, the installation of the balancing passage and the balancing hole can ensure smoothness and stability during the operation of the valve core 60. Specifically, there is a gap between the peripheral surface of the first segment 61 of the valve core 60 and the inner wall of the valve body 10, the first segment 61 is inserted and engaged with the fixed iron core 20, and the balancing passage penetrates the valve core 60 along the axial direction, that is, the balancing passage communicates with the valve port 102, one end of the balancing hole communicates with the balancing passage, and the other end of the balancing hole extends to the peripheral surface of the first segment 61 of the valve core 60. Through the above installation, the balancing hole connects the balancing passage to the valve port 102, The space between the fixed core 20 and the valve core 60 communicates with the valve port 102 through the balancing passage, the space between the movable core 50 and the fixed core 20 communicates with the valve port 102 through the balancing passage, and the gap between the movable core 50 and the inner wall of the valve body 10 forms a first gap, so that the space at one end of the movable core 50 away from the fixed core 20 communicates with the space between the movable core 50 and the fixed core 20 through the first gap. That is, the above installation makes it easy to mutually communicate the respective spaces formed by the movable core 50, the fixed core 20 and the valve core 60 in the valve body 10, and further ensures that the pressures at both ends of the movable core 50 are equal, and also ensures that the pressures at both ends of the valve core 60 are equal, thereby ensuring smooth and stable operation of the device.

[0039] In addition, the valve body 10 is provided with a through hole 103, the through hole 103 is provided on the side wall of the valve body 10, the through hole 103 communicates with the through chamber, the solenoid stop valve further includes a fourth sealing member 73, the fourth sealing member 73 is provided on the outer wall of the second segment 62 of the valve core 60, the fourth sealing member 73 can be engaged with the side wall of the receiving chamber 101 to seal, and when the valve core 60 is in a position to seal the valve port 102, the through hole 103 is located on the side of the fourth sealing member 73 close to the valve port 102. The installation of the fourth sealing member 73 can further improve the sealing effect of the device and realize the formation of a back pressure chamber.

[0040] The back pressure chamber in this embodiment is the region between the valve core 60, the body 11 and the sleeve 13, that is, located in the receiving chamber 101 above the fourth sealing member 73. In this embodiment, the valve body 10 further includes a sleeve 13, and the valve port 102 is located at one end of the valve body 10 away from the sleeve 13. Here, the fixed core 20 has a first end and a second end arranged opposite to each other, the first end of the fixed core 20 is fixed to the one end of the valve body 10 away from the valve port 102, and the second end of the fixed core 20 is inserted into the sleeve 13, the movable core 50 is movably installed in the sleeve 13 and located at the one end of the fixed core 20 away from the valve port 102, the first segment 61 of the valve core 60 passes through the fixed core 20 and is connected to the movable core 50, and the fixed core 20 is engaged with the movable core 50 to drive the valve core 60 to move in the receiving chamber 101. With the above structure, when the device is in operation, the fixed core 20 can be attracted to or separated from the movable core 50, so that the valve core 60 can seal or open the valve port 102. The above driving method is reasonable and has a simple structure, which not only satisfies the normal operation of the device, but also makes it easy to install and remove the device, thereby improving the efficiency of installation and removal of the device.

[0041] Here, in the embodiment of the present application, the electromagnetic stop valve further includes a coil 80, the coil 80 is arranged to surround the outer periphery of the sleeve 13, and after the coil 80 is energized, it can generate a magnetic force in the fixed core 20, and this magnetic force can drive the movable core 50 to move, so that the valve core 60 seals the valve port 102.

[0042] Specifically, in the embodiment of the present application, the fixed core 20 is provided with a fourth hole segment 21, a fifth hole segment 22 and a sixth hole segment 23 in the axial direction, in which the fourth hole segment 21 penetrates the second end of the fixed core 20 and the fifth hole segment 22 penetrates the first end of the fixed core 20. In this embodiment, the number of balancing holes is not limited, but in this embodiment, two balancing holes are provided, one balancing hole is located in the space between the fourth hole segment 21 and the movable core 50, and the other balancing hole is located in the space between the sixth hole segment 23 and the valve core 60. In this way, when the device is operating, one balancing hole can balance the pressure of the fourth hole segment 21, and the other balancing hole can balance the pressure of the sixth hole segment 23, so that the pressure of the fourth hole segment 21 and the pressure of the sixth hole segment 23 are equal to the pressure at the valve port 102, thereby further realizing the pressure balance between the inside of the fixed core 20 and the valve port 102, and at the same time ensuring the normal operation of the valve core 60, and further improving the stability when the device is operating.

[0043] Specifically, the balancing holes include a first through hole 63 and a second through hole 64, the first through hole 63 and the second through hole 64 are provided in the first segment 61 of the valve core 60 at an axial interval, the first through hole 63 and the second through hole 64 extend along the radial direction of the valve core 60, and when the valve core 60 is in a position to open the valve port 102, the first through hole 63 is located in the fourth hole segment 21, and the second through hole 64 is located in the sixth hole segment 23. In this way, the number of balancing holes is two, and when the device is working, the first through hole 63 and the second through hole 64 can respectively match the pressures of the fourth hole segment 21 and the sixth hole segment 23 with the valve core 60, so as to ensure that the pressures of each connection point inside the valve body 10 are as equal as possible, which not only makes rational use of the space of the valve core 60, but also balances the pressure inside the device, and ensures the normal operation of the device.

[0044] In other embodiments of the present application, the number of balancing holes may be multiple, which can further improve the internal balancing effect of the device, but at the same time, the processing difficulty of the valve core 60 will be increased. Therefore, it goes without saying that the appropriate number of balancing holes can be selected according to the actual usage requirements of the device.

[0045] Specifically, the diameters of the fourth hole segment 21 and the sixth hole segment 23 are larger than that of the fifth hole segment 22, and the fifth hole segment 22 is engaged with the first segment 61 of the valve core 60 to guide the first segment 61 of the valve core 60. By providing the above structure, the fourth hole segment 21 and the fifth hole segment 22 are provided in a stepped shape, which is advantageous to meet the installation requirements of the device, and at the same time, the fifth hole segment 22 can be engaged with the valve core 60 for use, so that the fixed core 20 will not interfere with the valve core 60 when the device is running, thereby ensuring the stability of the valve core 60 when it is running.

[0046] Specifically, the balancing passage has a first flow passage 65 and a second flow passage 66 which are arranged in a stepped manner in the axial direction, the first flow passage 65 is located in the first segment 61 of the valve core 60, the second flow passage 66 is located in the second segment 62 of the valve core 60, and the inner diameter of the first flow passage 65 is smaller than that of the second flow passage 66. In this way, the large-diameter internal balancing function of the device can be realized, and at the same time, the inner diameter dimension of the second flow passage 66 can be adjusted according to the flow rate requirement of the valve port 102, thereby improving the applicability of the device and widening the range of use of the device.

[0047] Furthermore, the movable core 50 has a first assembly hole and a third flow passage arranged in order along the axial direction, where the first assembly hole is arranged close to the fixed core 20, the diameter of the first assembly hole is smaller than the diameter of the third flow passage, the ends of the first assembly hole and the third flow passage extending away from each other extend to the end face of the movable core 50, the first assembly hole is arranged close to the fixed core 20, and the end of the first segment 61 of the valve core 60 away from the second segment 62 is inserted into the first assembly hole and fixedly engaged with the movable core 50. With the above arrangement, the balancing passage and the third flow passage are connected to further ensure the consistency of the pressure at both ends of the movable core 50, and the smoothness of the movable core 50 during its movement.

[0048] Furthermore, the electromagnetic stop valve further includes a second elastic member 71, which is disposed between the fixed core 20 and the movable core 50, one end of the second elastic member 71 is connected to the fixed core 20, the other end of the second elastic member 71 is connected to the movable core 50, and is located within the fourth hole segment 21. In this way, during operation, the elastic force of the second elastic member 71 can act on the movable core 50 so that the movable core 50 is in a position to open the valve port 102, thereby realizing the valve opening function. Here, the second elastic member 71 is specifically a return spring, which not only reduces the manufacturing cost, but also simplifies the structure and reduces the weight, which is advantageous for realizing the weight reduction of the device.

[0049] Specifically, the solenoid stop valve further includes a third sealing member 72, which is arranged to surround the outer periphery of the second segment 62 of the valve core 60 close to the valve port 102, and the third sealing member 72 can be engaged with the inner wall of the valve body 10 to seal the valve port 102. By providing the above structure, the third sealing member 72 can seal the valve port 102 to realize radial sealing of the connection point between the second end of the valve core 60 and the valve port 102, which can effectively reduce the internal leakage of the device and improve the sealing effect of the device.

[0050] In this embodiment, the second segment 62 of the valve core 60 is provided with an annular groove on its outer periphery, and the third sealing member 72 is provided in the annular groove, and the above structure can be easily installed and removed, and the above structure is also easy to process, so that the manufacturing cost of the device is further reduced. Furthermore, the valve port 102 is provided with such radial sealing, which can better achieve the same force-bearing area on the upper and lower sides of the valve core 60, and reduce the pressure difference between the upper and lower sides of the valve core 60, so that the pressure balance on both ends of the valve core 60 is more easily achieved, and the valve opening resistance is reduced.

[0051] In the solenoid stop valve of this embodiment, when the valve port 102 is in a sealed state, the balancing passage and balancing hole can balance the pressure between the space between the second segment 62 of the valve core 60 and the fixed core 20 and the valve port 102; the balancing passage and balancing hole can equalize the pressure between the space on the side of the movable core 50 away from the valve port 102 and the valve port 102 to ensure smooth valve opening.

[0052] As shown in Figures 3 to 5, the third embodiment of the present application provides an electromagnetic stop valve including a valve body 10, a fixed core 20 and a movable core assembly 30, and the movable core assembly 30 includes a movable core 50 and a valve core 60. Here, the valve body 10 has an accommodation chamber 101 and a valve port 102, and the valve port 102 is provided at one end of the valve body 10 and communicates with the accommodation chamber 101. The fixed core 20 is provided in the accommodation chamber 101 and faces the valve port 102. The movable core 50 is movably provided in the accommodation chamber 101, a first end of the movable core 50 is magnetically engaged with the fixed core 20, and a second end of the movable core 50 is provided to face the valve port 102. The valve core 60 is located in the receiving chamber 101, and is movably disposed at the second end of the movable core 50, and is used for opening or sealing the valve port 102. In the process of the movable core 50 moving away from the valve port 102, the valve core 60 has a stationary state and a moving state of moving synchronously with the movable core 50. Here, the movable core 50 has an initial position, an engaging position and an attracting position arranged along the direction from the valve port 102 to the fixed core 20, and when the movable core 50 is in the initial position, the valve core 60 is in a stationary state, and after the movable core 50 moves to the engaging position, the valve core 60 moves synchronously with the movable core 50 until the movable core 50 moves to the attracting position.

[0053] When the technical aspect of the present application is applied, during the process of the movable core 50 moving from the initial position to the engagement position when the valve is opened, the valve core 60 remains stationary, and in this case, the movable core 50 does not need to overcome the differential pressure that the valve core 60 receives, and only needs to overcome the differential pressure of the valve core 60 when the movable core 50 moves the valve core 60 to move synchronously. Specifically, during the valve is opened, the movable core 50 moves toward the fixed core 20 under the action of the electromagnetic force, and after the movable core 50 moves to the engagement position, the movable core 50 moves toward the fixed core 20 to move synchronously until the movable core 50 moves to the adsorption position, and the valve core 60 completely opens the valve port 102. The electromagnetic force between the movable core 50 and the fixed core 20 and the distance between them are in an exponentially changing relationship, so that the smaller the distance between the movable core 50 and the fixed core 20, the stronger the magnetic force between them. Therefore, the magnetic force when the movable core 50 is in the engaged position is much larger than that when the movable core 50 is in the initial position. In the conventional technical embodiment, the valve core 60 always moves in synchronization with the movable core 50, so when the valve is opened, it is necessary to overcome the differential pressure of the valve core 60 from the time when the movable core 50 is in the initial position. When the valve is in the initial position, the electromagnetic force between the movable core 50 and the fixed core 20 is small, so that the difficulty of opening the valve in the conventional technical embodiment is high. Compared with the conventional technical embodiment, the installation of this embodiment can increase the electromagnetic force at the time when the valve core 60 is driven to move, thereby improving the smoothness of the valve opening. In addition, the opening and closing of the valve port 102 is directly controlled by the valve core 60, and the structure is simple.

[0054] As shown in Figures 3 and 4, if the distance between the initial position and the engagement position is H1 and the distance between the initial position and the adsorption position is H, then 2%H≦H-H1≦20%H. When machining the movable core 50 and the valve core 60, there is a processing error, and when assembling the movable core 50 and the valve core 60, there is an assembly error. If H-H1≦2%H, H1>H may occur under actual working conditions, and the valve may not be able to be opened. If H-H1≧20%H, the gap between the movable core 50 and the fixed core 20 may become too large after the movable core 50 moves to the engagement position, which may affect the valve opening effect. Therefore, the present application can further improve the smoothness of the valve opening process by setting H-H1 within the above range. Alternatively, H-H1=2%H, H-H1=5%H, H-H1=6%H, H-H1=8%H, H-H1=10%H, H-H1=15%H or H-H1=20%H, and in this embodiment, H-H1=5%H.

[0055] As shown in Fig. 3 and Fig. 5, the valve core 60 has an insertion hole, the second end of the movable core 50 is movably inserted into the insertion hole, and a limiting structure is provided between the valve core 60 and the movable core 50, which is used to limit the relative displacement between the movable core 50 and the valve core 60. Specifically, when the valve is opened, under the action of the electromagnetic force, the movable core 50 moves toward the fixed core 20 until the movable core 50 moves to the engagement position, and in this case, the limiting structure acts between the movable core 50 and the valve core 60 so that the valve core 60 moves synchronously with the movable core 50. The above installation has a simple structure. In addition, by inserting the second end of the movable core 50 into the insertion hole, when the valve core 60 is in a state of sealing the valve port, the overall height of the movable core 50 and the valve core 60 can be reduced as much as possible, and further, the compactness of the electromagnetic stop valve can be ensured so that the electromagnetic stop valve can be miniaturized.

[0056] 4 and 5, the insertion hole includes a first insertion hole 601 and a second insertion hole 602 that are stepped along the direction from the fixed core 20 to the valve port 102, the diameter of the second insertion hole 602 is larger than the diameter of the first insertion hole 601, a step surface is formed between the first insertion hole 601 and the second insertion hole 602, a limiting part 501 is provided at the second end of the movable core 50, the limiting part 501 is limitedly engaged with the step surface, when the movable core 50 is in the initial position, there is a gap between the limiting part 501 and the step surface, when the movable core 50 is in the engaged position, the limiting part 501 abuts against the step surface, and the movable core 50 moves the valve core 60 by the limiting part 501 engaging with the step surface. In this embodiment, the limiting part 501 and the step surface form a limiting structure. Specifically, when the valve is opened, the movable core 50 moves toward the fixed core 20, and the valve core 60 is stationary during the process of the movable core 50 moving from the initial position to the engagement position, and when the movable core 50 moves to the engagement position, the limiting portion 501 abuts against the step surface, and the movable core 50 continues to move toward the fixed core 20, and the electromagnetic force received by the movable core 50 is sufficient to overcome the gravity of the movable core 50, the gravity of the valve core 60, and the differential pressure received by the valve core 60, and in this case, the movable core 50 moves the valve core 60 toward the fixed core 20 until the movable core 50 moves to the adsorption position. Specifically, the distance between the end face of the limiting portion 501 close to the step surface and the step surface is equal to the distance between the initial position and the engagement position of the movable core 50. By doing this, the distance between the initial position and the engagement position can be reflected by the distance between the end face of one end of the limiting portion 501 that is closest to the step surface and the step surface. If it is necessary to adjust the distance between the initial position and the engagement position, it is sufficient to adjust the distance between the end face of the one end of the limiting portion 501 that is closest to the step surface and the step surface, and further, the adaptability of the aspect can be ensured.

[0057] As shown in Fig. 5, the movable core 50 is provided with a third balancing passage 502, one end of which is provided through the end face of the first end of the movable core 50, and the other end of which is provided through the end face of the second end of the movable core 50 and communicates with the insertion hole. The third balancing passage 502 allows the pressures at both ends of the movable core 50 to quickly achieve internal balance, reducing the resistance that the movable core 50 experiences during its movement, and improving the smoothness of the movement of the valve core 60. In this embodiment, the extension direction of the third balancing passage 502 is the same as that of the movable core 50. This ensures the balancing effect of the third balancing passage 502 against air pressure.

[0058] In addition, a second balancing hole 503 is provided on the side wall of the movable core 50, the second balancing hole 503 is provided adjacent to the first end of the movable core 50, and the second balancing hole 503 communicates with the third balancing passage 502. The second balancing hole 503 can further play a role in equalizing the air pressure, and the gap between the movable core 50 and the receiving chamber 101 communicates with the second balancing hole 503 to equalize the pressures at both ends of the valve core 60, so as to ensure the smooth movement of the valve core 60. In this embodiment, there is no limit to the number of the second balancing holes 503, and in this embodiment, one second balancing hole 503 is provided, and the extension direction of the second balancing hole 503 is perpendicular to the extension direction of the movable core 50.

[0059] 3 and 5, the electromagnetic stop valve further includes a buffer member 91. The buffer member 91 is disposed between the second end of the movable core 50 and the valve core 60, with one end of the buffer member 91 connected to the valve core 60 and the other end of the buffer member 91 connected to the second end of the movable core 50. In this embodiment, the buffer member 91 is a buffer spring, which is fitted into the second end of the movable core 50, with one end of the buffer spring connected to the movable core 50 and the other end of the buffer spring connected to the step surface. The installation of the buffer spring plays a buffering role when the limiting part 501 comes into contact with the step surface, thereby reducing the force acting on the valve core 60 by the limiting part 501 at the moment of contact between the limiting part 501 and the step surface, thereby ensuring stability during the process of the movable iron core 50 moving the valve core 60. At the same time, it reduces the deformation of the end face and the step surface at one end close to the step surface of the limiting part 501 due to the impact force, and ensures that after long-term use, the distance between the initial position and the engagement position is as consistent as possible with the distance between the two at the time of shipment, thereby ensuring smooth opening of the valve.

[0060] As shown in FIG. 5, the valve core 60 includes a third segment 611, a fourth segment 612, and a fifth segment 613 connected in order from the fixed core 20 to the valve port 102, and the outer diameter of the third segment 611 and the outer diameter of the fifth segment 613 are all larger than the outer diameter of the fourth segment 612. The valve body 10 is further provided with a through hole 103, which is provided in communication with the receiving chamber 101. When the valve core 60 is in a position to seal the valve port 102, the through hole 103 is provided opposite the fourth segment 612. This can reduce the weight of the entire valve core 60, and further reduce the gravity of the valve core 60 that the movable core 50 needs to overcome when moving the valve core 60, thereby further improving the smoothness of the valve opening. When the valve core 60 is in a position to seal the valve port 102, the through hole 103 is provided opposite the fourth segment 612. The outer diameter of the fourth segment 612 is smaller than that of the fifth segment 613, and the outer diameter of the fourth segment 612 is smaller than that of the third segment 611. This reduces the contact area between the valve core 60 and the fluid, and further reduces the impact force of the fluid on the valve core 60, thereby ensuring the stability of the valve core 60. This also increases the space between the valve core 60 and the inner wall of the valve body 10, and further ensures the flow rate of the fluid, thereby improving the smoothness of the fluid flow. In addition, the third segment 611 and the fifth segment 613 are both clearance-fitted into the accommodating chamber 101, and the gap between the fourth segment 612 and the inner wall of the valve body 10 is large, so that there is no need to overcome the friction force between the fourth segment 612 and the inner wall of the valve body 10 during the opening and closing process, and the smoothness of the opening and closing process is improved.

[0061] As shown in FIG. 3 and FIG. 5, the solenoid stop valve further includes a fifth sealing member 603 and a sixth sealing member 604, the fifth sealing member is fitted to the outer periphery of the third segment 611 and hermetically connected to the inner wall of the valve body 10, and the sixth sealing member 604 is fitted to the outer periphery of the fifth segment 613 and hermetically connected to the inner wall of the valve body 10. The fifth sealing member 603 and the sixth sealing member 604 are installed to increase the sealing effect of the sealing of the first chamber 111, and further ensure the stability of the valve closing. Specifically, a first mounting groove is annularly provided on the peripheral surface of the third segment 611, and the fifth sealing member 603 is fitted into the first mounting groove. A second mounting groove is annularly provided on the peripheral surface of the fifth segment 613, and the sixth sealing member 604 is fitted into the second mounting groove. By doing so, convenience in installing the fifth sealing member and the sixth sealing member can be ensured, and stability in installing the fifth sealing member 603 and the sixth sealing member 604 can be ensured, and further stability during the valve opening and closing processes can be ensured.

[0062] Specifically, the valve body 10 includes a body 11 and a sleeve 13, and the electromagnetic stop valve further includes a coil 80. Here, the body 11 has a first chamber 111, and the valve port 102 is provided at one end of the body 11 and communicates with the first chamber 111. The sleeve 13 has a second chamber 131, and one end of the sleeve 13 is inserted into the body 11, the sleeve 13 is provided facing the valve port 102, and the second chamber 131 communicates with the first chamber 111 to form a receiving chamber. The second chamber 131 and the first chamber 111 are provided coaxially, and the cross section of the second chamber 131 is smaller than the cross section of the first chamber 111. The fixed core 20 is provided at one end of the sleeve 13 away from the valve port 102. The coil 80 is fitted to the outer periphery of the sleeve 13 and magnetically engaged with the fixed core 20. The valve core 60 is movably disposed in the first chamber 111 . When the movable core 50 is in an initial position, the second end of the movable core 50 is located in the first chamber 111 and abuts against the valve core 60 .

[0063] 3 and 5, the movable core 50 includes a magnetic part 51 and an engagement part 52 connected to each other along the direction from the fixed core 20 to the valve port 102, the cross-sectional area of ​​the engagement part 52 is smaller than that of the magnetic part 51, and the engagement part 52 is slidably engaged with the valve core 60, and the valve core 60 includes a protrusion 614 and a main body part connected to each other along the direction from the fixed core 20 to the valve port 102, the cross-sectional area of ​​the protrusion 614 is smaller than that of the main body part, and the cross-sectional area of ​​the protrusion 614 is smaller than that of the magnetic part 51. Specifically, the third segment 611, the fourth segment 612 and the fifth segment 613 form the main body part. In addition, when the movable iron core 50 is in the initial position, one end of the magnetic part 51 connected away from the engaging part 52 is inserted into the second chamber 131, and the other end of the magnetic part 51 is inserted into the first chamber 111 and abuts and engages with the protruding part 614 of the valve core 60. In the actual use process, there is lubricating oil between the protruding part 614 and the magnetic part 51, and under the action of the lubricating oil, there is a certain adsorption force between the protruding part 614 and the magnetic part 51. The above installation can reduce the contact area between the protruding part 614 and the magnetic part 51, and further reduce the adsorption force between them to further improve the smoothness in the valve opening process. In addition, the installation of the protruding part 614 plays a role of guiding and restricting the movement of the engaging part 52, and can ensure the stability of the movement of the engaging part 52, and can further ensure the stability in the valve opening and closing processes.

[0064] Furthermore, the engagement part 52 includes a sixth segment, a seventh segment, an eighth segment, and a ninth segment that are arranged in a stepped manner in the axial direction, and the diameters of the sixth segment, the seventh segment, the eighth segment, and the ninth segment are gradually increased. Here, a second assembly hole is provided on the end face of one end of the magnetic part 51 close to the valve core 60, one end of the sixth segment away from the seventh segment is inserted into the second assembly hole and is interference-fitted into the second assembly hole, the eighth segment forms a limiting part, one end of the buffer spring is fitted into the outer periphery of the eighth segment and abuts against the ninth segment, and the other end of the buffer spring abuts against the inner periphery of the valve core 60. In this way, the convenience of assembling the buffer spring can be ensured, and the weight of the engagement part 52 can be reduced as much as possible, reducing the gravity of the engagement part 52 that needs to be overcome during the valve opening process, and improving the smoothness of the valve opening process.

[0065] As shown in FIG. 3, the electromagnetic stop valve further includes a return member 92, which is provided between the fixed core 20 and the movable core 50, and is used to drive the movable core 50 to return from the attracted position to the initial position. Furthermore, the third balancing passage 502 includes a first passage, a second passage, a third passage, and a fourth passage that are sequentially connected along a direction from the magnetic part 51 to the engaging part 52. The first passage, the second passage, and the third passage are all provided in the magnetic part 51, and the fourth passage is provided in the engaging part 52. Here, the diameter of the first passage is larger than the diameter of the second passage, and a third passage is formed in the second assembly hole, and the diameter of the third passage is larger than the diameter of the second passage. The diameter of the fourth passage is the same as the diameter of the second passage, and the fourth passage is provided through the engaging part 52. In this way, the compactness of the structure of the entire movable core 50 can be ensured. The return member 92 is a return spring, one end of which is provided within the first passage, and the other end of which protrudes from the first passage and is abutted and engaged with the fixed iron core 20. The installation of the return spring has a simple structure and can be easily assembled with the magnetic part 51, and by providing one end of the return spring within the first passage, the stability of the return spring can be ensured.

[0066] Compared with the conventional technical aspect, the installation of this aspect can increase the electromagnetic force at the time of driving and moving the valve core 60, thereby improving the smoothness of the valve opening. Moreover, this aspect has a simple structure, since the opening and closing of the valve port 102 is directly controlled by the valve core 60. Furthermore, the installation of the second insertion hole 602, the third balancing passage 502 and the second balancing hole 503 can improve the smoothness of the movement of the movable iron core 50 and the valve core 60.

[0067] It should be noted that the terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and further, when the terms "comprise" and / or "comprise" are used herein, it is to be understood that features, steps, operations, devices, assemblies, and / or combinations thereof are present.

[0068] Unless otherwise specifically described, the relative arrangement of the components and steps, the formulas and values ​​described in these embodiments do not limit the scope of the present application. At the same time, it should be understood that for convenience of description, the dimensions of each part shown in the drawings are not drawn in actual proportion. Although detailed descriptions of techniques, methods and devices already known to those skilled in the art may be omitted, the techniques, methods and devices should be considered as part of the approved specification, as necessary. In all examples shown and described herein, any specific values ​​should be construed as being merely illustrative and not limiting. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar symbols and letters represent similar things in the following drawings, so that once something is defined in one drawing, there is no need to further describe it in the subsequent drawings.

[0069] In the description of this application, orientations or positional relationships expressed by orientation terms such as "front, back, up, down, left, right", "lateral, longitudinal, vertical, horizontal", "top, bottom", etc. are generally based on the orientations or positional relationships shown in the drawings, but this is merely for the ease and simplicity of the description of this application, and unless otherwise stated, these orientation terms do not indicate or imply that the devices or elements shown necessarily have a specific orientation or are constructed and operated in a specific orientation, and should not be understood as limiting the scope of protection of this application, and orientation terms such as "inside, outside" are inside and outside with respect to the contour of each member itself.

[0070] For ease of description, spatially relative terms such as "above," "upper," "on top of," "above," and the like may be used herein to describe the spatial location of one device or feature relative to another device or feature as depicted in the figures. It should be understood that the spatially relative terms are intended to encompass different orientations during use or operation other than the orientation depicted in the figures of the device. For example, if a device in the figures is turned upside down, a device described as "above other devices or structures" or "on top of other devices or structures" would then be positioned "below other devices or structures" or "below other devices or structures." Thus, the exemplary term "above" can include two orientations: "above" and "below." The device can also be positioned in other different ways (rotated 90 degrees or positioned in other orientations) and a corresponding interpretation made of the spatially relative descriptions used herein.

[0071] It should be further explained that the use of terms such as "first", "second", etc. to define parts is merely intended to distinguish corresponding parts, and unless otherwise specified, the above terms have no special meaning and should not be understood as limiting the scope of protection of the present application.

[0072] The above is only a preferred embodiment of the present application, and is not intended to limit the present application. Those skilled in the art can make various modifications and variations to the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. The valve body (10), the fixed core (20) and the movable core assembly (30) are included. The valve body (10) has a receiving chamber (101), and the valve body (10) is further provided with a valve port (102), the valve port (102) communicating with the receiving chamber (101); The stationary core (20) is provided in the receiving chamber (101), The movable core assembly (30) is movably arranged within the accommodating chamber (101), the fixed core (20) and the movable core assembly (30) are distributed along the axial direction of the valve body (10), and the fixed core (20) can drive and move the movable core assembly (30) so that the movable core assembly (30) seals or opens the valve port (102).

2. 2. The electromagnetic stop valve according to claim 1, wherein the movable core assembly (30) has a first end and a second end arranged opposite to each other, the first end of the movable core assembly (30) corresponding to the fixed core (20), and the second end of the movable core assembly (30) corresponding to the valve port (12) and sealing or opening the valve port (102).

3. 3. The solenoid stop valve according to claim 2, wherein the valve body (10) includes a body (11) and a valve seat (12), the body (11) has an installation hole, the valve seat (12) is connected to the body (11) and is located within the installation hole, the valve seat (12) has the valve port (102), the accommodating chamber (101) includes a back pressure chamber and a flow chamber, the flow chamber is formed between the body (11) and a movable core assembly (30), and when the movable core assembly (30) seals the valve port (102), the valve port (102) communicates with the back pressure chamber through a balancing passage and is separated from the flow chamber.

4. 4. The electromagnetic stop valve according to claim 3, further comprising a second sealing member, the second sealing member being provided on an outer wall of the movable core assembly and located in a middle portion of the movable core assembly, the second sealing member being capable of engaging with and sealingly engaging with a side wall of the accommodating chamber, a balancing passage being provided through the movable core assembly along an axial direction, and when the movable core assembly seals the valve port, the back pressure chamber is in communication with the valve port through the balancing passage to balance the pressure between the back pressure chamber and the valve port.

5. 5. The solenoid stop valve according to claim 4, wherein the balancing passage includes a first hole segment (301), a second hole segment (302), and a third hole segment (303) that are sequentially connected along an axial direction, the third hole segment (303) being provided adjacent to the valve orifice (102), the third hole segment (303) having a diameter larger than that of the first hole segment (301), the first hole segment (301) having a diameter larger than that of the second hole segment (302), and when the movable core assembly (30) seals the valve orifice (102), the first hole segment (301) communicates with the valve orifice (102) and the third hole segment (103) communicates with the back pressure chamber.

6. The electromagnetic stop valve further includes a first sealing member (41); 4. The electromagnetic stop valve according to claim 3, wherein the first sealing member (41) is provided between the movable core assembly (30) and the valve port (102), and when the movable core assembly (30) seals the valve port (102), the first sealing member (41) can seal a gap between the movable core assembly (30) and the valve port (102).

7. The movable core assembly (30) includes a movable core (50) and a valve core (60) arranged in order along an axial direction, The valve core (60) is movably installed in the accommodating chamber (101), the valve core (60) includes a first segment (61) and a second segment (62) arranged in a stepped shape, the first segment (61) of the valve core (60) is inserted and connected to the fixed core (20), the second segment (62) of the valve core (60) is installed corresponding to the valve port (102) and opens or seals the valve port (102) by the second segment (62) of the valve core (60), the movable core (50) is located at one end of the fixed core (20) away from the valve port (102), 2. The solenoid stop valve according to claim 1, wherein the valve body (10) comprises a body (11) and a valve seat (12), the body (11) has an installation hole, the valve seat (12) is connected to the body (11) and is located in the installation hole, the valve seat (12) has the valve port (102), the accommodating chamber (101) comprises a back pressure chamber and a flow chamber, a flow chamber is formed between the body (11) and the second segment (62), and when the valve core (60) seals the valve port (102), the valve port (102) communicates with the back pressure chamber through a balancing structure, and the valve port (102) is separated from the flow chamber.

8. 8. The solenoid stop valve according to claim 7, wherein the balancing structure has a balancing passage and a balancing hole communicating with each other, the balancing passage passes through the valve core along an axial direction, the balancing hole is provided in a first segment of the valve core, and one end of the balancing hole is located in a side wall of the valve core.

9. The electromagnetic stop valve further includes a fourth sealing member (73); 8. The solenoid stop valve according to claim 7, wherein the fourth sealing member (73) is provided on an outer wall of the second segment (62) of the valve core (60), and the fourth sealing member (73) can be engaged and sealed against a side wall of the accommodating chamber (101).

10. 9. The electromagnetic stop valve according to claim 8, wherein the valve body (10) includes a sleeve (13), a first end of the fixed core (20) is fixed to one end of the body (11) away from the valve port (102), a second end of the fixed core (20) is inserted into the sleeve (13), the movable core (50) is movably provided within the sleeve (13), a first segment (61) of the valve core (60) penetrates the fixed core (20) and is connected to the movable core (50), and the fixed core (20) is engaged with the movable core (50) to drive the valve core (60) to move within the accommodating chamber (101).

11. 11. The electromagnetic stop valve according to claim 10, wherein the fixed core (20) is provided with a fourth hole segment (21), a fifth hole segment (22) and a sixth hole segment (23) in the axial direction, the fourth hole segment (21) being located at a second end of the fixed core (20) and the sixth hole segment (23) being located at a first end of the fixed core (20).

12. 12. The solenoid stop valve according to claim 11, wherein the balancing hole includes a first through hole (63) and a second through hole (64), the first through hole (63) and the second through hole (64) are provided in a first segment (61) of the valve core (60) spaced apart from each other along the axial direction, the first through hole (63) and the second through hole (64) both extend along a radial direction of the valve core (60), and when the valve core (60) is in a position to open the valve port (102), the first through hole (63) is located in the fourth hole segment (21) and the second through hole (64) is located in the sixth hole segment (23).

13. The electromagnetic stop valve according to claim 11, wherein the diameters of the fourth hole segment (21) and the sixth hole segment (23) are larger than the diameter of the fifth hole segment (22), and the fifth hole segment (22) is engaged with the first segment (61) of the valve core (60) to guide the first segment (61) of the valve core (60).

14. 9. The solenoid stop valve according to claim 8, wherein the balancing passage includes a first flow passage (65) and a second flow passage (66) that are arranged in a stepped manner in the axial direction, the first flow passage (65) is located within a first segment (61) of the valve core (60), the second flow passage (66) is located within a second segment (62) of the valve core (60), and an inner diameter of the first flow passage (65) is smaller than an inner diameter of the second flow passage (66).

15. The electromagnetic stop valve further includes a third sealing member (72); 8. The electromagnetic stop valve according to claim 7, wherein the third sealing member (72) is provided to surround an outer periphery of the second segment (62) of the valve core (60) close to the valve orifice (102), and the third sealing member (72) can be engaged with an inner wall of the valve body (10) to seal the valve orifice (102).

16. The electromagnetic stop valve according to claim 11, further comprising a second elastic member (71), the second elastic member (71) being disposed between the fixed core (20) and the movable core (50), and the second elastic member (71) being located within the fourth hole segment (21).

17. The armature assembly (30) includes an armature (50) and a valve core (60), The movable core (50) is movably disposed within the accommodating chamber (101), a first end of the movable core (50) is magnetically engaged with the fixed core (20), and a second end of the movable core (50) is disposed to face the valve port (102); The valve core (60) is located in the receiving chamber (101), and is movably mounted at a second end of the movable core (50), and the valve core (60) is used to open or seal the valve port (102). In the process of the movable core (50) moving in a direction away from the valve port (102), the valve core (60) has a stationary state and a moving state moving synchronously with the movable core (50); 2. The electromagnetic stop valve according to claim 1, wherein the movable core (50) has an initial position, an engagement position, and an adsorption position arranged along a direction from the valve port (102) to the fixed core (20), and when the movable core (50) is in the initial position, the valve core (60) is in the stationary state, and after the movable core (50) moves to the engagement position, the valve core (60) moves in synchronization with the movable core (50) until the movable core (50) moves to the adsorption position.

18. The electromagnetic stop valve according to claim 17, wherein, when a distance between the initial position and the engagement position is H1 and a distance between the initial position and the attraction position is H, 2%H≦H−H1≦20%H.

19. 18. The electromagnetic stop valve according to claim 17, wherein the valve core (60) has an insertion hole, the second end of the movable iron core (50) is movably inserted into the insertion hole, and a limiting structure is provided between the valve core (60) and the movable iron core (50), and the limiting structure is used to limit the amount of relative displacement between the movable iron core (50) and the valve core (60).

20. The insertion hole includes a first insertion hole (601) and a second insertion hole (602) that are stepped along a direction from the fixed core (20) to the valve port (102), the diameter of the second insertion hole (602) is larger than the diameter of the first insertion hole (601), a step surface is formed between the first insertion hole (601) and the second insertion hole (602), a limiting portion (501) is provided at a second end of the movable core (50), and the limiting portion (50 20. The electromagnetic stop valve according to claim 19, wherein: when the movable iron core (50) is in the initial position, there is a gap between the limiting portion (501) and the step surface; when the movable iron core (50) is in the engagement position, the limiting portion (501) abuts against the step surface; and the movable iron core (50) moves the valve core (60) by the limiting portion (501) engaging with the step surface.

21. 20. The electromagnetic stop valve according to claim 19, wherein the movable core (50) is provided with a third balancing passage (502), one end of the third balancing passage (502) is provided penetrating an end face of a first end of the movable core (50), and the other end of the third balancing passage (502) is provided penetrating an end face of a second end of the movable core (50) and is connected to the insertion hole.

22. 22. The solenoid stop valve according to claim 21, wherein a second balancing hole (503) is provided in a side wall of the movable core (50), the second balancing hole (503) is provided adjacent to a first end of the movable core (50), and the second balancing hole (503) is in communication with the third balancing passage (502).

23. The electromagnetic stop valve further includes a buffer member (91), 18. The electromagnetic stop valve according to claim 17, wherein the buffer member (91) is provided between the second end of the movable iron core (50) and the valve core (60), one end of the buffer member (91) is connected to the valve core (60), and the other end of the buffer member (91) is connected to the second end of the movable iron core (50).

24. 18. The electromagnetic stop valve according to claim 17, wherein the valve core (60) includes a third segment (611), a fourth segment (612), and a fifth segment (613) connected in this order in a direction from the fixed core (20) to the valve port (102), an outer diameter of the third segment (611) and an outer diameter of the fifth segment (613) are all larger than an outer diameter of the fourth segment (612), the valve body (10) is further provided with a flow hole (103), the flow hole (103) is provided in communication with the accommodating chamber (101), and when the valve core (60) is in a position to seal the valve port (102), the flow hole (103) is provided opposite the fourth segment (612).

25. 25. The electromagnetic stop valve of claim 24, further comprising a sixth sealing member (604), the sixth sealing member (604) being disposed between the valve core (60) and the valve port (102) to seal a gap between the valve core (60) and the valve port (102).

26. 18. The electromagnetic stop valve according to claim 17, wherein the movable core (50) includes a magnetic portion (51) and an engagement portion (52) connected to each other along a direction from the fixed core (20) to the valve port (102), a cross-sectional area of ​​the engagement portion (52) being smaller than a cross-sectional area of ​​the magnetic portion (51), the engagement portion (52) being slidingly engaged with the valve core (60), and the valve core (60) includes a protrusion portion (614) and a main body portion connected to each other along a direction from the fixed core (20) to the valve port (102), the cross-sectional area of ​​the protrusion (614) being smaller than a cross-sectional area of ​​the main body portion, and the cross-sectional area of ​​the protrusion (614) being smaller than a cross-sectional area of ​​the magnetic portion (51).

27. The electromagnetic stop valve according to claim 17, further comprising a return member (92), the return member (92) being provided between the fixed core (20) and the movable core (50), and the return member (92) being used to drive the movable core (50) to return from the adsorption position to the initial position.

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