Proportional electromagnet and switch electromagnet composite proportional valve

Abstract

The utility model provides a proportion electromagnet and switch electromagnet composite proportional valve which comprises a valve body, a switch electromagnetic assembly and a proportion electromagnetic assembly, a first oil guide chamber and a second oil guide chamber are arranged in the valve body, and a butt joint channel is arranged between the first oil guide chamber and the second oil guide chamber. A valve element assembly extending to the first oil guide chamber and the plugging opening is installed in the butt joint channel in a penetrating mode, a switch electromagnetic assembly and a proportional electromagnetic assembly are installed at the two ends of the valve body in a butt joint mode through connecting suites, and the two ends of the valve element assembly extend into the connecting suites correspondingly. A backflow type oil inlet assembly communicated with the first oil guide chamber is assembled at the bottom of the valve body, and an oil outlet component communicated with the second oil guide chamber is assembled at the bottom of the valve body. The multi-stage sealing assembly is adopted in the valve element assembly, so that the sealing effect of the valve during operation is guaranteed, oil is prevented from entering an electromagnetic induction area, and the phenomenon that the oil overflows when the valve stops is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of composite proportional valve equipment, in particular to a composite proportional valve of a proportional electromagnet and a switch electromagnet. Background Art

[0002] A compound proportional valve is a device used to control fluids and is commonly used in industrial automation systems. It consists of a main proportional valve and an auxiliary proportional valve, which can adjust two different parameters at the same time, such as pressure and flow; the working principle of the compound proportional valve is to adjust the passage area of ​​the fluid through the valve by changing the position of the valve core. The main proportional valve is responsible for controlling the main fluid parameters, such as flow or pressure, while the auxiliary proportional valve is used to adjust secondary parameters, such as liquid temperature or liquid level.

[0003] By searching the patent number: CN209164648U, it is learned that: both ends of the valve body are connected to tinplate pipes, the tinplate pipe on the left side is sleeved with a switch electromagnet coil, and the switch electromagnet coil is connected to an A-end plug, and the tinplate pipe on the right side is sleeved with a proportional electromagnet coil, and the proportional electromagnet coil is connected to a B-end plug, and the ends of the two tinplate pipes away from each other are provided with threads and are matched with plugs.

[0004] Through the above literature, we can know the optimization and improvement of the traditional composite valve. However, by combining the use of the composite valve during actual operation, it is analyzed that the existing composite valve still has certain shortcomings during operation. The existing composite valve uses a variety of different valve bodies for combined operation, which leads to more operation processes of the valve body compared with the traditional single valve body. Therefore, the frequent operation of the composite valve will increase the wear degree of the internal valve core and other component structures, resulting in reduced internal sealing, affecting the operation effect, and the valve body will reflux the oil when resetting. The traditional reflux structure is set inside the valve body, which easily leads to an increase in the pressure inside the valve body, thereby increasing the internal oil overflow phenomenon;

[0005] Therefore, the present application proposes a composite proportional valve of a proportional solenoid and a switch solenoid. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model provides a proportional solenoid and a switch solenoid composite proportional valve, which solves the problems mentioned in the background technology.

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A proportional valve composed of a proportional solenoid and a switch solenoid, comprising a valve body, a switch solenoid assembly and a proportional solenoid assembly, wherein the valve body is provided with an oil guide chamber 1 and an oil guide chamber 2 respectively, and a docking channel is provided between the oil guide chamber 1 and the oil guide chamber 2, wherein a valve core assembly extending to the oil guide chamber 1 and a plugging port is installed through the docking channel, the switch solenoid assembly and the proportional solenoid assembly are dockedly installed at both ends of the valve body through a connecting kit, and the two ends of the valve core assembly extend into the connecting kit respectively, the bottom of the valve body is provided with a reflux oil inlet assembly communicating with the oil guide chamber 1, and the bottom of the valve body is provided with an oil outlet component communicating with the oil guide chamber 2;

[0009] The reflux oil inlet assembly comprises an oil inlet component and a reflux component; the valve core assembly comprises a core tube, a sealing component 1, a spring 1, a blocking component, a core rod 1, a sealing component 2, a spring 2, a core rod 2, and a spring 3; an oil inlet component connected to an oil guide chamber 1 is butt-jointedly installed at the bottom of the valve body, and a reflux component connected to an oil guide chamber 1 is butt-jointedly installed on the oil inlet component; a core tube is installed through the butt-jointed channel, and diversion holes are provided at both ends of the core tube, a core rod 1 and a core rod 2 are butt-jointedly installed at both ends of the core tube, and both the core rod 1 and the core rod 2 extend into the connecting kit, and the ends of the core rod 1 and the core rod 2 are butt-jointedly installed with a spring 2 connected to a switch electromagnetic assembly and a proportional electromagnetic assembly, a blocking component and a sealing component 2 are respectively mounted on the core rod 1, a spring 3 is mounted on the core rod 1 between the blocking component and the sealing component 2, a sealing component 1 is mounted on the core rod 2, and a spring 1 is mounted on the core rod 2 between the sealing component 1 and the core tube.

[0010] Furthermore, the oil inlet component includes an oil inlet pipe, a transfer chamber, and an oil inlet one-way valve; the reflux component includes a reflux pipe and an oil outlet one-way valve, the bottom of the valve body is butt-jointed with an oil inlet one-way valve connected to an oil guide chamber, the bottom of the oil inlet one-way valve is butt-jointed with a transfer chamber, the bottom of the transfer chamber is butt-jointed with an oil inlet pipe, one side of the transfer chamber is butt-jointed with a connected reflux pipe, and the top of the reflux pipe is equipped with an oil outlet one-way valve connected to an oil guide chamber.

[0011] Furthermore, the oil outlet component includes an oil outlet pipe and an oil outlet port, one side of the bottom of the valve body is butt-connected with the oil outlet port connected to the second oil guide chamber, and the bottom of the oil outlet port is butt-connected with the oil outlet pipe.

[0012] Further, the switch electromagnetic assembly includes a mounting shell 1, a metal rod 1, a sealing cap 1, a connecting terminal 1, and a switch electromagnet 1; the proportional electromagnetic assembly includes a mounting shell 2, a metal rod 2, a sealing cap 2, a connecting terminal 2, and a switch electromagnet 2, one end of the connecting kit is fixedly installed with a mounting shell 1, a metal rod 1 is installed through the inside of the mounting shell 1, and one end of the metal rod 1 extends into the connecting kit and is installed and connected with the spring 2, a switch electromagnet 1 is sleeved on the metal rod 1, a sealing cap 1 is installed at the outer end of the metal rod 1, and a connecting terminal 1 connected and matched with the switch electromagnet 1 is fixedly installed on the top of the mounting shell 1;

[0013] The components of the proportional electromagnetic assembly are installed in accordance with the same principles as the components of the switch electromagnetic assembly.

[0014] Furthermore, the sealing component 1 includes a rubber gasket 1 and a sealing sheet 1, the rubber gasket 1 and the sealing sheet 1 are mounted on the core rod 2, and the spring 1 is located between the sealing sheet 1 and the core tube.

[0015] Furthermore, the sealing component includes a sealing block and a rubber gasket three; the sealing component two includes a rubber gasket two and a sealing piece two, the core rod one is equipped with a sealing piece two, a rubber gasket two, a sealing block and a rubber gasket three, and the rubber gasket two and the sealing piece two are a group, and the sealing block and the rubber gasket three are a group, and the spring three is located between the rubber gasket two and the sealing block.

[0016] The utility model provides a proportional solenoid and a switch solenoid composite proportional valve. Compared with the prior art, it has the following beneficial effects:

[0017] The multi-stage sealing component is adopted through the valve core component, which not only ensures the sealing effect of the valve during operation, prevents the oil from entering the electromagnetic induction area, but also reduces the phenomenon of oil overflow when the valve stops;

[0018] Through the mutual cooperation between the reflux oil inlet component and the oil outlet component, not only can the normal operation of the valve be guaranteed, but also the oil inlet and reflux operation of the valve can be utilized so that the crude oil liquid in the valve will not be compressed to the magnet area during the oil inlet period, and the balance inside the valve can be further guaranteed when it stops. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1The schematic diagram of the overall assembly state of the composite proportional valve of the utility model is shown;

[0021] Figure 2 The schematic diagram of the overall cross-sectional structure of the composite proportional valve of the utility model is shown;

[0022] Figure 3 A schematic diagram of the structure of the valve core assembly of the utility model is shown;

[0023] Figure 4 The schematic diagram of the structure of the switch electromagnetic assembly of the utility model is shown;

[0024] Figure 5 The schematic diagram of the structure of the proportional electromagnetic assembly of the utility model is shown;

[0025] As shown in the figure: 1. Valve body; 11. Oil guide chamber 1; 12. Docking channel; 13. Oil guide chamber 2; 14. Sealing port; 2. Reflux oil inlet assembly; 21. Oil inlet component; 211. Oil inlet pipe; 212. Transfer chamber; 213. Oil inlet check valve; 22. Reflux component; 221. Reflux pipe; 222. Oil outlet check valve; 3. Oil outlet component; 31. Oil outlet pipe; 32. Oil outlet; 4. Switch electromagnetic assembly; 41. Mounting housing 1; 42. Metal rod 1; 43. Sealing cap 1; 44. Connection terminal 1; 45. Switch electromagnetic 1; 5. Connection kit ;6. Proportional electromagnetic assembly;61. Mounting shell two;62. Metal rod two;63. Sealing cap two;64. Connecting terminal two;65. Switching electromagnet two;7. Valve core assembly;71. Core tube;711. Diversion hole;72. Sealing component one;721. Rubber gasket one;722. Sealing sheet one;73. Spring one;74. Blocking component;741. Blocking block;742. Rubber gasket three;75. Core rod one;76. Sealing component two;761. Rubber gasket two;762. Sealing sheet two;77. Spring two;78. Core rod two;79. Spring three. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model is described clearly and completely. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Embodiment 1

[0028] In order to solve the technical problems in the background technology, the following proportional solenoid and switch solenoid composite proportional valve is provided:

[0029] Combination Figure 1-Figure 5 As shown, the proportional solenoid and switch solenoid composite proportional valve provided by the utility model comprises a valve body 1, a switch solenoid assembly 4 and a proportional solenoid assembly 6, wherein the valve body 1 is provided with an oil guide chamber 11 and an oil guide chamber 2 13, respectively, and a docking channel 12 is provided between the oil guide chamber 11 and the oil guide chamber 2 13, wherein a valve core assembly 7 extending to the oil guide chamber 11 and the plugging port 14 is installed through the docking channel 12, and the switch solenoid assembly 4 and the proportional solenoid assembly 6 are dockedly installed at both ends of the valve body 1 through a connecting kit 5, and the two ends of the valve core assembly 7 extend into the connecting kit 5, respectively, and the bottom of the valve body 1 is equipped with a reflux oil inlet assembly 2 communicating with the oil guide chamber 11, and the bottom of the valve body 1 is equipped with an oil outlet component 3 communicating with the oil guide chamber 2 13;

[0030] The external oil will enter the oil guide chamber 11 through the reflux oil inlet component 2, and the oil can be diverted through the valve core component 7 in the docking channel 12. The valve core component 7 adopts a multi-stage sealing component, which not only ensures the sealing effect of the valve during operation, prevents the oil from entering the electromagnetic induction area, but also reduces the overflow of the oil when the valve is stopped. The opening and closing operations of the valve are realized by the switch electromagnetic component 4, and the proportional electromagnetic component 6 realizes the adjustment operation of the valve. The two cooperate with each other to ensure the normal operation requirements of the valve. The mutual cooperation between the reflux oil inlet component 2 and the oil outlet component 3 can not only ensure the normal operation of the valve, but also utilize the oil inlet and reflux operations of the valve, so that the valve will not cause the crude oil in the valve to be compressed to the magnet area during the oil inlet period, and the balance inside the valve can be further guaranteed when it stops.

[0031] The reflux oil inlet assembly 2 includes an oil inlet component 21 and a reflux component 22; the valve core assembly 7 includes a core tube 71, a sealing component 1 72, a spring 1 73, a blocking component 74, a core rod 1 75, a sealing component 2 76, a spring 2 77, a core rod 2 78, and a spring 3 79. The bottom of the valve body 1 is docked with an oil inlet component 21 connected to the oil guide chamber 11, and the oil inlet component 21 is docked with a reflux component 22 connected to the oil guide chamber 11; the docking channel 12 is penetrated by a core tube 71, and both ends of the core tube 71 are provided with guide holes 711, and the two ends of the core tube 71 are respectively A core rod 1 75 and a core rod 2 78 are separately butt-jointed and both extend into the connecting kit 5. The ends of the core rod 1 75 and the core rod 2 78 are butt-jointed with a spring 2 77 connected to the switch electromagnetic assembly 4 and the proportional electromagnetic assembly 6. A blocking component 74 and a sealing component 2 76 are respectively mounted on the core rod 1 75. A spring 3 79 is mounted on the core rod 1 75 between the blocking component 74 and the sealing component 2 76. A sealing component 1 72 is mounted on the core rod 2 78. A spring 1 73 is mounted on the core rod 2 78 between the sealing component 1 72 and the core tube 71.

[0032] The reflux oil inlet component 2 can ensure the stability of the oil pressure inside the valve during the operation of the valve. In this way, when the oil inlet component 21 is taking in oil, the reflux component 22 performs reflux. When the valve stops operating, the oil is retained inside the valve again. One purpose is to ensure the stability of the internal oil pressure. The other is to prevent the internal components of the valve from rusting when the valve is not opened or closed for a long time. The oil immersion inside can avoid such a phenomenon. The blocking component 74 cooperates with the sealing component 2 76 to ensure that the blocking component 74 will not cause oil to enter the electromagnet operating area during operation. The sealing component 1 72 on the core rod 2 78 is also to prevent this phenomenon from occurring, thereby increasing the overall sealing effect of the valve.

[0033] Embodiment 2

[0034] like Figure 1 and Figure 2 As shown, based on the above embodiment, this embodiment further provides the following contents:

[0035] In this embodiment, the oil inlet component 21 includes an oil inlet pipe 211, a transfer chamber 212, and an oil inlet check valve 213; the return component 22 includes a return pipe 221 and an oil outlet check valve 222, the bottom of the valve body 1 is butt-jointed with an oil inlet check valve 213 connected to the oil guide chamber 11, the bottom of the oil inlet check valve 213 is butt-jointed with a transfer chamber 212, the bottom of the transfer chamber 212 is butt-jointed with an oil inlet pipe 211, one side of the transfer chamber 212 is butt-jointed with a connected return pipe 221, and the top of the return pipe 221 is equipped with an oil outlet check valve 222 connected to the oil guide chamber 11.

[0036] The oil inlet pipe 211 and the oil inlet check valve 213 are assembled with each other;

[0037] During this period, the external oil enters through the oil inlet check valve 213, then enters the transfer chamber 212 through the oil inlet check valve 213, and enters the oil guide chamber 11 through the oil inlet pipe 211 for diversion operation;

[0038] At this time, the blocking component 74 has moved between the oil inlet check valve 213 and the oil outlet check valve 222, and the oil originally in the oil guide chamber 11 will be pushed by the core tube 71, causing the oil to enter the return pipe 221 through the oil outlet check valve 222 for reflux. At this time, the oil enters the oil guide chamber 11 and enters the core tube 71 for guidance, realizing the operation of the valve, and then after the valve stops taking in oil, the oil inlet check valve 213 stops taking in oil.

[0039] In this embodiment, the oil outlet component 3 includes an oil outlet pipe 31 and an oil outlet port 32. The oil outlet port 32 connected to the oil guide chamber 2 13 is docked and installed on one side of the bottom of the valve body 1, and the oil outlet pipe 31 is docked and installed at the bottom of the oil outlet port 32.

[0040] During the oil discharge period, the oil in the oil guide chamber 13 will be discharged through the oil outlet joint 31 and the oil outlet 32, and the oil will be introduced into the oil cylinder to complete the output operation.

[0041] Embodiment 3

[0042] like Figure 1-Figure 4 As shown, based on the above embodiment, this embodiment further provides the following contents:

[0043] In this embodiment, the switch electromagnetic assembly 4 includes a mounting shell 41, a metal rod 42, a sealing cap 43, a connecting terminal 44, and a switch electromagnet 45; the proportional electromagnetic assembly 6 includes a mounting shell 61, a metal rod 62, a sealing cap 63, a connecting terminal 64, and a switch electromagnet 65. One end of the connecting kit 5 is fixedly installed with the mounting shell 41, and the inside of the mounting shell 41 is penetrated and installed with a metal rod 42, and one end of the metal rod 42 extends into the connecting kit 5 and is installed and connected with the spring 77. The switch electromagnet 45 is mounted on the metal rod 42, and the outer end of the metal rod 42 is butt-connected with a sealing cap 43, and the top of the mounting shell 41 is fixedly installed with a connecting terminal 44 connected and matched with the switch electromagnet 45;

[0044] The components of the proportional electromagnetic assembly 6 are installed in accordance with the same principle as the components of the switch electromagnetic assembly 4 , and need to be installed and connected to an external control facility via a connecting terminal 1 44 .

[0045] During the operation of the proportional valve, the switch electromagnetic assembly 4 can be opened first, and the switch electromagnetic assembly 4 and the metal rod 42 pull the core rod 75 under the electromagnetic action, and then the core rod 75 drives the core tube 71 and the blocking component 74 to move as a whole, so as to realize the oil inlet operation of the valve;

[0046] If the flow rate needs to be adjusted, the proportional electromagnetic assembly 6 is started, the switch electromagnetic assembly 4 is closed, and the electromagnetic action of the proportional electromagnetic assembly 6 and the metal rod 2 62 is used to guide the core tube 71 and the blocking component 74 to operate, so as to control the oil intake;

[0047] In this embodiment, the sealing component 72 includes a rubber gasket 721 and a sealing sheet 722 . The rubber gasket 721 and the sealing sheet 722 are mounted on the core rod 78 . The spring 73 is located between the sealing sheet 722 and the core tube 71 .

[0048] The sealing component 72 can prevent oil from entering the proportional electromagnetic assembly 6;

[0049] It should be noted that when the valve is in a normal state, the spring 73 is in a compressed state;

[0050] When the core tube 71 moves and enters the diversion state, the diversion hole 711 on the core tube 71 will be connected with the oil guide chamber 2 13. At this time, the spring 1 73 is in a semi-compressed state, and the front end sealing sheet 1 722 will still be in a continuous resistance state to ensure that the sealing sheet 1 722 closes the front end.

[0051] In this embodiment, the sealing component 74 includes a sealing block 741 and a rubber gasket 742; the sealing component 76 includes a rubber gasket 761 and a sealing piece 762; the core rod 75 is provided with a sealing piece 762, a rubber gasket 761, a sealing block 741 and a rubber gasket 742; the rubber gasket 761 and the sealing piece 762 are a group, the sealing block 741 and the rubber gasket 742 are a group, and the spring 79 is located between the rubber gasket 761 and the sealing block 741.

[0052] The blocking member 74 plays an important role in stopping flow during valve operation;

[0053] During this period, when the switch electromagnetic assembly 4 is opened, the core tube 71 moves toward the switch electromagnetic assembly 4, and then the blocking block 741 releases the blocking of the oil inlet 213, and the oil first enters the oil guide chamber 11, then enters the core tube 71 through the guide hole 711, and then is introduced into the oil guide chamber 2 13 through the guide hole 711 at the other end to be discharged;

[0054] When the oil is being guided, the proportional electromagnetic assembly 6 can be started to adjust the movement of the core tube 71, so that the core tube 71 will drive the blocking block 741 to adjust the port size of the oil inlet 213 during movement until the required guide volume is reached.

[0055] The working principle and use process of this utility model:

[0056] During this period, the external oil enters through the oil inlet check valve 213, then enters the transfer chamber 212 through the oil inlet check valve 213, and enters the oil guide chamber 11 through the oil inlet pipe 211 for diversion operation. During the operation of the proportional valve, the switch electromagnetic component 4 can be opened first, and the switch electromagnetic component 4 and the metal rod 42 pull the core rod 75 under the electromagnetic action. At this time, the core rod 75 drives the core tube 71 and the blocking component 74 to move as a whole, so as to realize the oil inlet operation of the valve;

[0057] If the flow rate needs to be adjusted, the proportional electromagnetic assembly 6 is started, the switch electromagnetic assembly 4 is closed, and the electromagnetic action of the proportional electromagnetic assembly 6 and the metal rod 2 62 is used to guide the core tube 71 and the blocking component 74 to operate, so as to control the oil intake. When the core tube 71 moves and enters the flow diversion state, the diversion hole 711 on the core tube 71 will be connected with the oil guide chamber 2 13. At this time, the spring 1 73 is in a semi-compressed state, and the front end sealing sheet 1 722 is still in a continuous resistance state, ensuring that the sealing sheet 1 722 closes the front end;

[0058] During this period, when the switch electromagnetic assembly 4 is opened, the core tube 71 moves toward the switch electromagnetic assembly 4, and then the blocking block 741 releases the blocking of the oil inlet 213, and the oil first enters the oil guide chamber 11, then enters the core tube 71 through the guide hole 711, and then is introduced into the oil guide chamber 2 13 through the guide hole 711 at the other end to be discharged;

[0059] When the oil is being guided, the proportional electromagnetic assembly 6 can be activated to adjust the movement of the core tube 71, so that the core tube 71 drives the blocking block 741 to adjust the port size of the oil inlet 213 during the movement until the required guide volume is reached;

[0060] During the oil discharge period, the oil in the oil guide chamber 13 will be discharged through the oil outlet joint 31 and the oil outlet 32, and the oil will be introduced into the oil cylinder to complete the output operation.

[0061] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0062] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A composite proportional valve of a proportional solenoid and a switch solenoid, characterized in that: The invention comprises a valve body (1), a switch electromagnetic assembly (4) and a proportional electromagnetic assembly (6); the valve body (1) is provided with an oil guide chamber 1 (11) and an oil guide chamber 2 (13) respectively, and a docking channel (12) is provided between the oil guide chamber 1 (11) and the oil guide chamber 2 (13); a valve core assembly (7) extending to the oil guide chamber 1 (11) and a sealing port (14) is installed through the docking channel (12); the switch electromagnetic assembly (4) and the proportional electromagnetic assembly (6) are dockedly installed at both ends of the valve body (1) through a connecting kit (5), and the two ends of the valve core assembly (7) extend into the connecting kit (5) respectively; the bottom of the valve body (1) is provided with a reflux oil inlet assembly (2) communicating with the oil guide chamber 1 (11); and the bottom of the valve body (1) is provided with an oil outlet component (3) communicating with the oil guide chamber 2 (13); The reflux oil inlet assembly (2) comprises an oil inlet component (21) and a reflux component (22); the valve core assembly (7) comprises a core tube (71), a sealing component 1 (72), a spring 1 (73), a blocking component (74), a core rod 1 (75), a sealing component 2 (76), a spring 2 (77), a core rod 2 (78), and a spring 3 (79); the bottom of the valve body (1) is butt-jointed with an oil inlet component (21) communicating with an oil guide chamber 1 (11); the oil inlet component (21) is butt-jointed with a reflux component (22) communicating with an oil guide chamber 1 (11); a core tube (71) is installed through the butt-jointed passage (12); two ends of the core tube (71) are provided with flow guide holes (711); two ends of the core tube (71) are provided with guide holes (711); A core rod 1 (75) and a core rod 2 (78) are respectively butt-jointed and installed, and both the core rod 1 (75) and the core rod 2 (78) extend into the connection kit (5). The ends of the core rod 1 (75) and the core rod 2 (78) are both butt-jointed with a spring 2 (77) connected to the switch electromagnetic assembly (4) and the proportional electromagnetic assembly (6). The core rod 1 (75) is respectively provided with a blocking component (74) and a sealing component 2 (76). The core rod 1 (75) between the blocking component (74) and the sealing component 2 (76) is provided with a spring 3 (79). The core rod 2 (78) is provided with a sealing component 1 (72). The core rod 2 (78) between the sealing component 1 (72) and the core tube (71) is provided with a spring 1 (73).

2. The proportional solenoid and switch solenoid composite proportional valve according to claim 1, characterized in that: The oil inlet component (21) comprises an oil inlet pipe (211), a transfer chamber (212), and an oil inlet check valve (213); the return component (22) comprises a return pipe (221) and an oil outlet check valve (222); the bottom of the valve body (1) is butt-jointed with an oil inlet check valve (213) which is in communication with the first oil guide chamber (11); the bottom of the oil inlet check valve (213) is butt-jointed with a transfer chamber (212); the bottom of the transfer chamber (212) is butt-jointed with an oil inlet pipe (211); one side of the transfer chamber (212) is butt-jointed with a return pipe (221) which is in communication with the first oil guide chamber (11); and the top of the return pipe (221) is equipped with an oil outlet check valve (222) which is in communication with the first oil guide chamber (11).

3. The proportional solenoid and switch solenoid composite proportional valve according to claim 2 is characterized in that: The oil outlet component (3) comprises an oil outlet pipe (31) and an oil outlet port (32); an oil outlet port (32) communicating with the second oil guide chamber (13) is butt-jointedly mounted on one side of the bottom of the valve body (1); and an oil outlet pipe (31) is butt-jointedly mounted on the bottom of the oil outlet port (32).

4. The proportional solenoid and switch solenoid composite proportional valve according to claim 1, characterized in that: The switch electromagnetic assembly (4) comprises a mounting shell (41), a metal rod (42), a sealing cap (43), a connecting terminal (44), and a switch electromagnet (45); the proportional electromagnetic assembly (6) comprises a mounting shell (61), a metal rod (62), a sealing cap (63), a connecting terminal (64), and a switch electromagnet (65); one end of the connecting kit (5) is fixedly mounted with the mounting shell (41); the interior of the mounting shell (41) is penetrated by the metal rod (42); one end of the metal rod (42) extends into the connecting kit (5) and is connected to the spring (77); the switch electromagnet (45) is mounted on the metal rod (42); the outer end of the metal rod (42) is butt-connected with the sealing cap (43); the top of the mounting shell (41) is fixedly mounted with a connecting terminal (44) connected to and matched with the switch electromagnet (45); The components of the proportional electromagnetic assembly (6) are installed in accordance with the same principles as the components of the switch electromagnetic assembly (4).

5. The proportional solenoid and switch solenoid composite proportional valve according to claim 1, characterized in that: The sealing component 1 (72) comprises a rubber gasket 1 (721) and a sealing sheet 1 (722); the core rod 2 (78) is provided with the rubber gasket 1 (721) and the sealing sheet 1 (722); and the spring 1 (73) is located between the sealing sheet 1 (722) and the core tube (71).

6. The proportional solenoid and switch solenoid composite proportional valve according to claim 1, characterized in that: The blocking component (74) comprises a blocking block (741) and a rubber gasket three (742); the sealing component two (76) comprises a rubber gasket two (761) and a sealing piece two (762); the core rod one (75) is provided with a sealing piece two (762), a rubber gasket two (761), a blocking block (741) and a rubber gasket three (742); the rubber gasket two (761) and the sealing piece two (762) form a group, and the blocking block (741) and the rubber gasket three (742) form a group; the spring three (79) is located between the rubber gasket two (761) and the blocking block (741).

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