High-flow low-pressure-loss valve assembly and electromagnetic valve

Abstract

The utility model relates to the technical field of valves, and discloses a high-flow low-pressure-loss valve assembly and an electromagnetic valve. The electromagnetic valve comprises a high-flow low-pressure-loss valve assembly, the high-flow low-pressure-loss valve assembly comprises a valve sleeve and a valve element arranged in the valve sleeve, a valve cavity is formed in the valve sleeve, a valve port is formed in the valve cavity, the valve element comprises a sealing head located at the end, the sealing head is located on one side of the valve port, and the sealing head is arranged in the valve cavity in a sliding mode to close or open the valve port. The inner wall of the valve cavity is provided with a sealing conical surface on the peripheral side of the valve port, the inner diameter of the sealing conical surface increases gradually in the direction close to the sealing head, the end, close to the valve port, of the sealing head is a flat end face, and the edge of the flat end face can abut against the sealing conical surface. According to the valve assembly, the sealing head of the valve element is not provided with a conical surface, the sealing conical surface is arranged at the position of the valve port of the valve sleeve, the throttling effect brought by the conical surface of the valve element is effectively reduced, meanwhile, the opening area when the valve port is opened by the sealing head is increased, and therefore larger passing flow and smaller pressure loss are obtained.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a valve assembly and a solenoid valve with large flow and low pressure loss. Background Art

[0002] The solenoid valve mainly opens or closes the corresponding valve port by reversing the movement of its valve core relative to the valve sleeve, thereby realizing the conduction or cutoff of the hydraulic oil circuit. In the prior art, a conical valve core is usually used, and a sealing cone surface is provided on the conical valve core. The end face of the valve port is a flat end face. When the valve core closes the valve port, the sealing cone surface of the valve core contacts the edge of the flat end face at the valve port to realize line sealing, which can ensure a very small amount of internal leakage. However, when the sealing cone surface is located on the valve core, the opening area and stroke of the valve core when opening the valve port will be limited, thereby limiting the maximum flow through the opening and increasing the pressure loss, which is not conducive to the energy saving and economic requirements of the current hydraulic system.

[0003] Therefore, there is an urgent need to provide a valve assembly and a solenoid valve with large flow and low pressure loss to solve the above problems. Utility Model Content

[0004] One purpose of the utility model is to provide a valve assembly with large flow and low pressure loss, which can solve the technical problems of limited maximum flow and increased pressure loss when the valve core is opened in the prior art.

[0005] Another object of the utility model is to provide a solenoid valve, which can solve the technical problems of limited maximum flow and increased pressure loss when the valve core is opened in the prior art by providing the above-mentioned valve assembly with large flow and low pressure loss.

[0006] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0007] A valve assembly with large flow and low pressure loss, comprising a valve sleeve and a valve core arranged in the valve sleeve, wherein a valve cavity is arranged in the valve sleeve, a valve port is arranged in the valve cavity, and the valve core comprises a sealing head located at an end, the sealing head is located at one side of the valve port, and the sealing head is slidably arranged in the valve cavity to close or open the valve port;

[0008] The inner wall of the valve cavity is provided with a sealing cone surface on the peripheral side of the valve port, and the inner diameter of the sealing cone surface increases toward the sealing head. The end of the sealing head close to the valve port is a flat end surface, and the edge of the flat end surface can abut against the sealing cone surface.

[0009] As an optional solution, a wing plate is convexly provided on the peripheral side of the sealing head.

[0010] As an optional solution, two rows of oil ports 1 respectively connected to the valve cavity are provided on the side wall of the valve sleeve, the two rows of oil ports 1 are arranged at intervals along the axial direction of the valve sleeve, and the multiple oil ports 1 in each row are arranged at intervals along the circumferential direction of the valve sleeve, and the wing plate is located between the two rows of oil ports 1 and can cut off the two rows of oil ports 1.

[0011] As an optional solution, the two rows of oil ports are staggered.

[0012] As an optional solution, an oil port 2 is further provided on the side wall of the valve sleeve, and the valve cavity comprises an oil cavity 1, an oil cavity 2 and an oil cavity 3 which are sequentially connected in the axial direction, the oil port 1 is connected to the oil cavity 2, and the oil port 2 is connected to the oil cavity 3;

[0013] The valve port includes valve port 1 and valve port 2, the end of the oil chamber 1 communicating with the oil chamber 2 is valve port 1, the end of the oil chamber 3 communicating with the oil chamber 2 is valve port 2, the sealing head is slidably arranged in the oil chamber 2 to selectively seal the valve port 1 or the valve port 2, the inner wall of the oil chamber 1 on the peripheral side of the valve port 1 and the inner wall of the oil chamber 3 on the peripheral side of the valve port 2 are both provided with the sealing cone surface, and the axial ends of the sealing head are both the flat end surfaces.

[0014] As an optional solution, the flat end surfaces at both axial ends of the sealing head are symmetrically arranged with respect to the wing plate.

[0015] As an optional solution, the valve sleeve includes a main valve sleeve and a limiting sleeve, the limiting sleeve is coaxial with the main valve sleeve and threadedly connected, and the main valve sleeve and the limiting sleeve together form the valve cavity.

[0016] As an optional solution, one end of the main valve sleeve close to the limit sleeve is provided with an internal thread, and one end of the limit sleeve close to the main valve sleeve is provided with an external thread, the limit sleeve is inserted into the main valve sleeve, and is fastened to the main valve sleeve through the external thread and the internal thread; or

[0017] One end of the main valve sleeve close to the limiting sleeve is provided with an external thread, and one end of the limiting sleeve close to the main valve sleeve is provided with an internal thread. The limiting sleeve is sleeved outside the main valve sleeve and is fastened to the main valve sleeve through the internal thread and the external thread.

[0018] A solenoid valve includes a drive assembly and the above-mentioned large-flow, low-pressure-loss valve assembly, wherein the valve core also includes a rod portion connected to the sealing head, the drive assembly is connected to one end of the valve sleeve, and the drive assembly is configured to cooperate with the rod portion to drive the valve core to move axially thereof.

[0019] As an optional scheme, the driving assembly includes a magnetic sleeve, a moving iron, a first push rod, a spring seat and a spring, the magnetic sleeve is fixedly connected to one end of the valve sleeve, the moving iron is slidably disposed in the magnetic sleeve, a through hole is provided in the magnetic sleeve, the first push rod is slidably disposed in the through hole, one end of the first push rod abuts against the moving iron, and the other end abuts against the rod portion, the spring seat is fixedly connected to one end of the rod portion away from the sealing head, the spring sleeve is disposed on the rod portion and is limited between the spring seat and the valve sleeve.

[0020] As an optional scheme, the solenoid valve also includes a manual component, which includes a tail bell, a second push rod, a locking cap and a third push rod. The locking cap is fixedly connected to the outside of the end of the magnetic sleeve away from the valve sleeve, one end of the tail bell is fixedly connected to the locking cap, and the other end extends into the magnetic sleeve, one end of the second push rod is passed through the locking cap and cooperates with the tail bell guide, and the other end extends to the outside of the locking cap, one end of the third push rod passes through the tail bell and abuts against the moving iron, and the other end is passed through the second push rod.

[0021] The beneficial effects of the utility model are:

[0022] The utility model provides a valve assembly with large flow and low pressure loss. When the valve core moves to make its sealing head close the valve port, the flat end face edge on the sealing head abuts against the sealing cone surface of the inner wall of the valve cavity to form a cone line seal, thereby obtaining a good sealing effect and a small leakage. Compared with the prior art, the valve assembly provided by the utility model has no cone surface design on the sealing head of the valve core, but the sealing cone surface is set at the valve port of the valve sleeve, which effectively reduces the throttling effect brought by the cone surface of the valve core, and at the same time increases the opening area when the sealing head opens the valve port, thereby obtaining a larger flow rate and a smaller pressure loss, which is beneficial to the energy saving and economic requirements of the current hydraulic system. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to explain the embodiments of the utility model or the technical solutions in the prior art more clearly and easily, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. The drawings described below are 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.

[0024] Figure 1 It is a structural schematic diagram of the solenoid valve provided by an embodiment of the utility model;

[0025] Figure 2 yes Figure 1 A partial enlarged view of the middle A;

[0026] Figure 3It is a structural schematic diagram of the valve sleeve provided in an embodiment of the utility model.

[0027] In the figure:

[0028] 10. Valve sleeve; 11. Valve chamber; 111. Oil chamber 1; 112. Oil chamber 2; 113. Oil chamber 3; 114. Hexagon socket hole; 12. Valve port; 121. Valve port 1; 122. Valve port 2; 123. Sealing cone; 13. Main valve sleeve; 131. Oil port 1; 132. Oil port 2; 14. Limit sleeve;

[0029] 20, valve core; 21, rod; 22, sealing head; 221, wing plate; 222, flat end surface;

[0030] 30. driving assembly; 31. magnetic guide sleeve; 32. moving iron; 33. first push rod; 34. spring; 35. spring seat;

[0031] 40. Manual assembly; 41. Tail stop; 42. Second push rod; 43. Locking cap; 44. Third push rod; 45. Nut; 46. Handle. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0033] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0035] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0036] This embodiment provides a valve assembly with large flow rate and low pressure loss and a solenoid valve, wherein the solenoid valve includes the valve assembly with large flow rate and low pressure loss. Figure 1 and Figure 2 As shown, the valve assembly with large flow and low pressure loss includes a valve sleeve 10 and a valve core 20 slidably arranged in the valve sleeve 10. The valve sleeve 10 is provided with a valve cavity 11 for fluid flow, and the valve cavity 11 has a valve port 12. The valve core 20 is an integrally formed structure, which includes a rod 21 and a sealing head 22 connected to one end of the rod 21. The sealing head 22 is located on one side of the valve port 12, and the sealing head 22 is slidably arranged in the valve cavity 11 to close or open the valve port 12. The inner wall of the valve cavity 11 and the peripheral side of the valve port 12 are provided with a sealing cone surface 123, and the inner diameter of the sealing cone surface 123 increases toward the direction close to the sealing head 22. The end of the sealing head 22 close to the valve port 12 is a flat end surface 222, and the flat end surface 222 is perpendicular to the axial direction of the valve core 20. The edge of the flat end surface 222 can abut against the sealing cone surface 123.

[0037] When the valve core 20 moves so that its sealing head 22 closes the valve port 12, the edge of the flat end surface 222 on the sealing head 22 abuts against the sealing cone surface 123 of the inner wall of the valve cavity 11, forming a cone line seal, obtaining a good sealing effect and a small leakage. Compared with the prior art, the valve assembly provided in this embodiment has no cone surface design on the sealing head 22 of the valve core 20, but the sealing cone surface 123 is set at the valve port 12 of the valve sleeve 10, which effectively reduces the throttling effect brought by the cone surface of the valve core 20, and also increases the opening area when the sealing head 22 opens the valve port 12, so that a larger flow rate and a smaller pressure loss can be obtained, which is beneficial to the energy saving and economic requirements of the current hydraulic system, and can also reduce the processing difficulty of the valve core 20, and the cost is lower.

[0038] In this embodiment, the solenoid valve is specifically a two-position three-way double-stop normally closed solenoid valve, such as Figure 1 As shown, the solenoid valve includes a drive assembly 30 and the above-mentioned large flow and low pressure loss valve assembly. The drive assembly 30 is connected to one end of the valve sleeve 10. The drive assembly 30 is configured to cooperate with the rod 21 to drive the valve core 20 to move along its axial direction.

[0039] Specifically, Figure 1As shown, the drive assembly 30 includes a magnetic sleeve 31, a moving iron 32, a first push rod 33, a spring seat 35 and a spring 34. The magnetic sleeve 31 is fixedly connected to one end of the valve sleeve 10, and a coil (not shown) is wound around the outside of the magnetic sleeve 31. The moving iron 32 is slidably disposed in the magnetic sleeve 31. A through hole is provided in the magnetic sleeve 31. The first push rod 33 is slidably disposed in the through hole, and one end of the first push rod 33 abuts against the moving iron 32, and the other end abuts against the rod 21. The spring seat 35 is fixedly connected to one end of the rod 21 away from the sealing head 22. The spring 34 is sleeved on the rod 21, and one end of the spring 34 abuts against the spring seat 35, and the other end abuts against the valve sleeve 10.

[0040] like Figure 2 and Figure 3 As shown, an oil port 131 and an oil port 2 132 are provided on the side wall of the valve sleeve 10, and the valve chamber 11 includes an oil chamber 1 111, an oil chamber 2 112 and an oil chamber 3 113 which are sequentially connected along the axial direction, the oil port 131 is connected to the oil chamber 2 112, and the oil port 2 132 is connected to the oil chamber 3 113, the radial dimension of the sealing head 22 is greater than the radial dimension of the rod portion 21, the aperture of the oil chamber 2 112 is greater than the apertures of the oil chamber 3 113 and the oil chamber 1 111, the sealing head 22 is slidably disposed in the oil chamber 2 112, and the rod portion 21 is slidably disposed in the oil chamber 3 113. The valve port 12 includes valve port 1 121 and valve port 2 122, wherein the end where the oil chamber 1 111 is connected to the oil chamber 2 112 is valve port 1 121, and the end where the oil chamber 3 113 is connected to the oil chamber 2 112 is valve port 2 122, that is, the opening at the left end of the oil chamber 1 111 is valve port 1 121, and the opening at the right end of the oil chamber 3 113 is valve port 2 122. The sealing head 22 is slidably disposed in the oil chamber 2 112 to selectively seal the valve port 1 121 or the valve port 2 122.

[0041] When the coil of the solenoid valve is not energized, the spring 34 pushes the valve core 20 to move to the left. At this time, the sealing head 22 of the valve core 20 seals the valve port 2 122 and opens the valve port 1 121, so that the oil port 1 131 and the oil port 2 132 are cut off, and the oil port 1 131 is connected to the oil chamber 1 111. The oil can flow to the oil port 1 131 through the oil chamber 1 111 and the oil chamber 2 112 in turn. Figure 1 and Figure 2 As shown, when the coil is energized, the moving iron 32 and the magnetic sleeve 31 are magnetized and attract each other, and the moving iron 32 pushes the valve core 20 to move to the right through the first push rod 33 to overcome the elastic force of the spring 34. At this time, the sealing head 22 of the valve core 20 seals the valve port 1 121 and opens the valve port 2 122 to cut off the oil port 1 131 and the oil chamber 1 111, and the oil port 1 131 is connected to the oil port 2 132. The oil can flow to the oil port 1 131 through the oil port 2 132, the oil chamber 3 113 and the oil chamber 2 112 in turn, so as to realize the switching of the oil circuit.

[0042] Among them, Figure 2As shown, the inner wall of the oil chamber 111 is provided with a sealing cone surface 123 on the peripheral side of the valve port 121, and the inner wall of the oil chamber 3 113 is provided with a sealing cone surface 123 on the peripheral side of the valve port 2 122. Both axial ends of the sealing head 22 are flat end surfaces 222. The inner diameter of the sealing cone surface 123 at the valve port 121 increases in the axial direction to the left, and the inner diameter of the sealing cone surface 123 at the valve port 2 122 increases in the axial direction to the right. When the sealing head 22 moves right to close the valve port 121, the edge of the flat end surface 222 on the sealing head 22 abuts against the sealing cone surface 123 at the valve port 121, forming a cone line seal, obtaining a good sealing effect, and a small amount of leakage. When the sealing head 22 moves left to close the valve port 2 122, the edge of the flat end surface 222 on the sealing head 22 abuts against the sealing cone surface 123 at the valve port 2 122, forming a cone line seal, obtaining a good sealing effect, and a small amount of leakage. There is no conical surface design on the sealing head 22 of the valve core 20. Instead, the sealing conical surface 123 is set at the valve port 1 121 and the valve port 2 122 of the valve sleeve 10, which effectively reduces the throttling effect brought by the conical surface of the valve core 20. At the same time, it also increases the opening area when the sealing head 22 opens the valve port 1 121 and the valve port 2 122 respectively, thereby obtaining a larger flow rate and a smaller pressure loss, which is beneficial to the energy saving and economy requirements of the current hydraulic system.

[0043] However, existing solenoid valves usually have the problem of limited maximum flow rate, that is, when the flow rate exceeds a certain value, the hydraulic force acting on the valve core 20 increases and exceeds the electromagnetic force or the spring force, so that the electromagnetic force or the spring force cannot push the valve core 20 to move, resulting in the solenoid valve being unable to effectively switch. Traditional solenoid valves usually cannot be switched when the flow rate exceeds 15L / min. If a larger flow rate is required, a larger model of solenoid valve must be selected, and a larger solenoid valve will take up more space and require a higher cost.

[0044] Therefore, in order to solve the above problems, Figure 2 As shown, a wing plate 221 is convexly arranged on the peripheral side of the sealing head 22. According to the principle of fluid mechanics, the direction of the hydraulic force received by the valve core 20 is the direction to close the corresponding valve port 12. When the sealing head 22 is switched to the sealing valve port 122, the oil flows from the oil chamber 111 to the oil port 131. At this time, the hydraulic force received by the valve core 20 is to the right, so that the sealing head 22 tends to close the valve port 121. However, the oil has a larger flow rate when passing through the opening between the valve port 121 and the sealing head 22. This liquid flow generates a leftward impact force on the wing plate 221, which is opposite to the direction of the hydraulic force received by the valve core 20, and can offset a part of the hydraulic force, thereby balancing the hydraulic force and reducing the influence of the hydraulic force. Similarly, Figure 1 and Figure 2As shown, when the sealing head 22 is switched to the sealing valve port 121, the oil flows from the oil port 132 to the oil port 131. At this time, the hydraulic force applied to the valve core 20 is to the left, causing the sealing head 22 to tend to close the valve port 122. However, the oil has a greater flow rate when passing through the opening between the valve port 122 and the sealing head 22. This liquid flow produces a rightward impact force on the wing plate 221, which is opposite to the direction of the hydraulic force applied to the valve core 20. It can offset a part of the hydraulic force, thereby balancing the hydraulic force and reducing the influence of the hydraulic force. Therefore, by providing the wing plate 221 on the sealing head 22, the hydraulic force can be balanced when the flow rate increases, so that the electromagnetic force or spring force can normally push the valve core 20 to move, ensuring that the solenoid valve can be switched normally, thereby increasing the flow limit of the solenoid valve without increasing the cost. Figure 3 As shown, the number of the second oil ports 132 is set to be multiple, and the multiple second oil ports 132 are arranged at intervals along the circumference of the valve sleeve 10.

[0045] like Figure 2 and Figure 3 As shown, two rows of oil ports 131 are provided on the side wall of the valve sleeve 10, which are respectively connected to the valve cavity 11. The two rows of oil ports 131 are arranged at intervals along the axial direction of the valve sleeve 10, and the multiple oil ports 131 in each row are arranged at intervals along the circumferential direction of the valve sleeve 10. The wing plate 221 is located between the two rows of oil ports 131 and can cut off the two rows of oil ports 131. For ease of understanding, the right row of oil ports 131 is defined as oil port 131a, and the left row of oil ports 131 is defined as oil port 131b. When the sealing head 22 closes the valve port 2 122, the oil port 131a is connected to the oil cavity 111, and the oil port 131b is cut off from the oil port 2 132. When the sealing head 22 closes the valve port 121, the oil port 131b is connected to the oil port 2 132, and the oil port 131a is cut off from the oil cavity 111. With such arrangement, during the reversal of the valve core 20, the wing plate 221 can cut off the oil port 131a and the oil port 131b, thereby cutting off the oil chamber 111 and the oil port 2 132, so that the oil flowing into the oil chamber 111 can only flow out through the oil port 131a, and the oil flowing into the oil port 2 132 can only flow out through the oil port 131b, thereby preventing the oil in the oil chamber 111 from flowing into the oil port 2 132 or the oil in the oil port 2 132 from flowing into the oil chamber 111 in series during the reversal of the valve core 20, and effectively reducing the influence of the hydraulic force during the reversal of the valve core 20. Through verification, the wing plate 221 cooperates with the two rows of oil ports 131 on the valve sleeve 10, so that when the flow limit reaches more than 45L / min, the solenoid valve can still work normally. Compared with the flow limit of about 15L / min of the traditional solenoid valve, the maximum working flow is more than 3 times that of the traditional structure.

[0046] In addition, the wing plate 221 also has a function of guiding in cooperation with the hole wall of the oil chamber 112. In actual processing, the valve core 20 and the valve sleeve 10 cannot be made absolutely axially symmetrical, and the oil in the oil port 1 131 will eventually flow out through a hole on the valve block, which will generate a radial unbalanced force on the valve core 20. This radial unbalanced force will cause the valve core 20 to swing radially, hindering the sealing head 22 from closing the valve ports 1 121 and 2 122, slowing down the closing speed, and even affecting the closing effect of the sealing head 22, resulting in a large amount of oil leakage. Through the guiding effect of the wing plate 221 and the oil chamber 112, the radial swing of the sealing head 22 is avoided, so that the sealing head 22 can quickly close the valve ports 1 121 and 2 122, and the closing sealing effect is better.

[0047] like Figure 2 As shown, the flat end faces 222 at both ends of the sealing head 22 are symmetrically arranged about the wing plate 221. During the movement of the valve core 20, the flat end faces 222 at both ends can respectively cooperate with the corresponding sealing cone surfaces 123 for sealing, so that a symmetrical sealing design is formed on both sides of the wing plate 221, and the wing plate 221 can also realize the cutoff of the two rows of oil ports 131, and the structural layout is reasonable.

[0048] In an optional embodiment, if Figure 3 As shown, the two rows of oil ports 131 are staggered, that is, oil ports 131a and oil ports 131b are staggered. This arrangement avoids the distance between oil ports 131a and oil ports 131b being too small, which leads to a low structural strength of the valve sleeve 10, thereby ensuring the structural strength of the valve sleeve 10.

[0049] In an optional embodiment, if Figure 2 As shown, one end of the oil chamber 111 away from the oil chamber 2 112 is set as a hexagonal hole 114, so as to facilitate the assembly of the end of the valve sleeve 10 and the external pipeline.

[0050] In an optional embodiment, if Figure 1 and Figure 2 As shown, the valve sleeve 10 includes a main valve sleeve 13 and a limiting sleeve 14. The limiting sleeve 14 is coaxial with the main valve sleeve 13 and threadedly connected. The main valve sleeve 13 and the limiting sleeve 14 together form a valve cavity 11. When assembling the valve core 20, the valve core 20 is first installed in the main valve sleeve 13, and then the limiting sleeve 14 is installed on the main valve sleeve 13 to enclose the valve core 20 inside and realize the action control function of the valve core 20. The above arrangement makes the installation of the valve core 20 convenient and quick.

[0051] In an optional embodiment, if Figure 1 and Figure 2As shown, one end of the main valve sleeve 13 close to the limiting sleeve 14 is provided with an internal thread, and one end of the limiting sleeve 14 close to the main valve sleeve 13 is provided with an external thread. The limiting sleeve 14 is inserted into the main valve sleeve 13, and is fastened to the main valve sleeve 13 through the external thread and the internal thread, thereby realizing a stable connection between the main valve sleeve 13 and the limiting sleeve 14, and convenient and quick disassembly. In this embodiment, the oil chamber three 113, the oil chamber two 112, the oil port one 131 and the oil port two 132 are all opened on the main valve sleeve 13, the oil chamber one 111 is opened on the limiting sleeve 14, the valve port one 121 is the port of the limiting sleeve 14, and the threaded section is located on the right side of the oil port one 131.

[0052] In another optional embodiment, an end of the main valve sleeve 13 close to the limit sleeve 14 may be provided with an external thread, and an end of the limit sleeve 14 close to the main valve sleeve 13 may be provided with an internal thread. The limit sleeve 14 is sleeved outside the main valve sleeve 13 and is fastened to the main valve sleeve 13 through the internal thread and the external thread, thereby achieving a stable connection between the main valve sleeve 13 and the limit sleeve 14, and convenient and quick disassembly. In this embodiment, the oil chamber 1 111, the oil chamber 2 112 and the oil port 1 131 are all provided on the limit sleeve 14, the oil port 2 132 and the oil chamber 3 113 are all provided on the main valve sleeve 13, the valve port 1 121 is the port of the main valve sleeve 13, and the threaded section is located on the left side of the oil port 1 131.

[0053] In an optional embodiment, if Figure 1 As shown, in order to enable the solenoid valve to have the function of manual emergency operation, the solenoid valve also includes a manual component 40, which includes a tail bell 41, a second push rod 42, a locking cap 43 and a third push rod 44. The locking cap 43 is fixedly connected to the outside of the end of the magnetic sleeve 31 away from the valve sleeve 10. One end of the tail bell 41 is threadedly fixed in the locking cap 43, and the other end extends into the magnetic sleeve 31. One end of the second push rod 42 is inserted into the locking cap 43 and cooperates with the guide of the tail bell 41, and the other end extends to the outside of the locking cap 43. One end of the third push rod 44 is inserted into the tail bell 41 and abuts against the moving iron 32, and the other end is inserted into the second push rod 42. When the coil of the solenoid valve cannot work, the second push rod 42 can be pushed manually to make the second push rod 42 push the third push rod 44, and the third push rod 44 pushes the moving iron 32 to move right. The moving iron 32 pushes the valve core 20 to move right through the first push rod 33 to overcome the elastic force of the spring 34, so that the sealing head 22 seals the valve port 121, thereby realizing manual reversing of the valve core 20.

[0054] like Figure 1As shown, the second push rod 42 is threadedly connected in the locking cap 43 and can rotate relative to the third push rod 44, so the third push rod 44 can be pushed to move rightward by screwing the second push rod 42. In order to ensure the connection stability of the second push rod 42, a nut 45 is threadedly sleeved on the outside of the second push rod 42, and the nut 45 is tightly pressed against the left side of the locking cap 43. The free end of the second push rod 42 is also fixedly connected to a handle 46, through which the second push rod 42 can be easily screwed, thereby achieving the purpose of labor saving.

[0055] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A valve assembly with large flow and low pressure loss, characterized in that: The invention comprises a valve sleeve (10) and a valve core (20) arranged in the valve sleeve (10), wherein a valve cavity (11) is arranged in the valve sleeve (10), wherein a valve port (12) is arranged in the valve cavity (11), and wherein the valve core (20) comprises a sealing head (22) located at an end thereof, wherein the sealing head (22) is located at one side of the valve port (12), and wherein the sealing head (22) is slidably arranged in the valve cavity (11) to close or open the valve port (12); The inner wall of the valve cavity (11) is provided with a sealing cone surface (123) on the peripheral side of the valve port (12), and the inner diameter of the sealing cone surface (123) increases gradually in a direction approaching the sealing head (22). One end of the sealing head (22) close to the valve port (12) is a flat end surface (222), and the edge of the flat end surface (222) can abut against the sealing cone surface (123).

2. The high flow and low pressure loss valve assembly according to claim 1, characterized in that: A wing plate (221) is convexly provided on the peripheral side of the sealing head (22).

3. The high flow and low pressure loss valve assembly according to claim 2, characterized in that: Two rows of oil ports (131) respectively connected to the valve cavity (11) are provided on the side wall of the valve sleeve (10); the two rows of oil ports (131) are arranged at intervals along the axial direction of the valve sleeve (10); a plurality of oil ports (131) in each row are arranged at intervals along the circumferential direction of the valve sleeve (10); and the wing plate (221) is located between the two rows of oil ports (131) and can cut off the two rows of oil ports (131).

4. The high flow and low pressure loss valve assembly according to claim 3, characterized in that: The two rows of oil ports 1 (131) are arranged alternately.

5. The high flow and low pressure loss valve assembly according to claim 3, characterized in that: The side wall of the valve sleeve (10) is also provided with an oil port 2 (132); the valve cavity (11) comprises an oil cavity 1 (111), an oil cavity 2 (112) and an oil cavity 3 (113) which are sequentially connected in the axial direction; the oil port 1 (131) is connected to the oil cavity 2 (112), and the oil port 2 (132) is connected to the oil cavity 3 (113); The valve port (12) comprises valve port one (121) and valve port two (122); the end of the oil chamber one (111) communicating with the oil chamber two (112) is the valve port one (121); the end of the oil chamber three (113) communicating with the oil chamber two (112) is the valve port two (122); the sealing head (22) is slidably arranged in the oil chamber two (112) to selectively seal the valve port one (121) or the valve port two (122); the inner wall of the oil chamber one (111) on the peripheral side of the valve port one (121) and the inner wall of the oil chamber three (113) on the peripheral side of the valve port two (122) are both provided with the sealing cone surface (123); and the axial ends of the sealing head (22) are both the flat end surfaces (222).

6. The high flow and low pressure loss valve assembly according to claim 5, characterized in that: The flat end surfaces (222) at the axial ends of the sealing head (22) are symmetrically arranged with respect to the wing plate (221).

7. The high flow rate and low pressure loss valve assembly according to any one of claims 1 to 6, characterized in that: The valve sleeve (10) comprises a main valve sleeve (13) and a limiting sleeve (14); the limiting sleeve (14) is coaxial with the main valve sleeve (13) and threadedly connected; the main valve sleeve (13) and the limiting sleeve (14) together form the valve cavity (11).

8. The high flow and low pressure loss valve assembly according to claim 7, characterized in that: One end of the main valve sleeve (13) close to the limiting sleeve (14) is provided with an internal thread, and one end of the limiting sleeve (14) close to the main valve sleeve (13) is provided with an external thread, and the limiting sleeve (14) is inserted into the main valve sleeve (13) and is fastened to the main valve sleeve (13) via the external thread and the internal thread; or An end of the main valve sleeve (13) close to the limiting sleeve (14) is provided with an external thread, and an end of the limiting sleeve (14) close to the main valve sleeve (13) is provided with an internal thread. The limiting sleeve (14) is sleeved outside the main valve sleeve (13) and is fastened to the main valve sleeve (13) via the internal thread and the external thread.

9. A solenoid valve, characterized in that: It comprises a drive assembly (30) and a large flow and low pressure loss valve assembly as described in any one of claims 1 to 8, wherein the valve core (20) further comprises a rod portion (21) connected to the sealing head (22), the drive assembly (30) is connected to one end of the valve sleeve (10), and the drive assembly (30) is configured to cooperate with the rod portion (21) to drive the valve core (20) to move along its axial direction.

10. The solenoid valve according to claim 9, characterized in that: The driving assembly (30) comprises a magnetic sleeve (31), a moving iron (32), a first push rod (33), a spring seat (35) and a spring (34); the magnetic sleeve (31) is fixedly connected to one end of the valve sleeve (10); the moving iron (32) is slidably disposed in the magnetic sleeve (31); a through hole is provided in the magnetic sleeve (31); the first push rod (33) is slidably disposed in the through hole; one end of the first push rod (33) abuts against the moving iron (32) and the other end abuts against the rod (21); the spring seat (35) is fixedly connected to one end of the rod (21) away from the sealing head (22); the spring (34) is sleeved on the rod (21) and limited between the spring seat (35) and the valve sleeve (10).

11. The solenoid valve according to claim 10, characterized in that: The solenoid valve also includes a manual component (40), and the manual component (40) includes a tail pin (41), a second push rod (42), a locking cap (43) and a third push rod (44). The locking cap (43) is fixedly connected to the outside of one end of the magnetic sleeve (31) away from the valve sleeve (10). One end of the tail pin (41) is fixedly connected to the locking cap (43), and the other end extends into the magnetic sleeve (31). One end of the second push rod (42) is inserted into the locking cap (43) and cooperates with the guide of the tail pin (41), and the other end extends to the outside of the locking cap (43). One end of the third push rod (44) is inserted into the tail pin (41) and then abuts against the moving iron (32), and the other end is inserted into the second push rod (42).

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