A normally closed electromagnetic check valve for an electric hydraulic valve actuator

Abstract

The utility model discloses a normally closed electromagnetic one-way valve of an electric hydraulic valve actuator, wherein the electromagnetic coil is wound on a coil frame, the valve core is installed in the center hole of the coil frame, the coil frame is sleeved in the outer frame, a spring hole is provided inside the upper end of the valve core, and a spring is provided in the spring hole, the bottom of the spring contacts the bottom end of the spring hole, a first valve seat is provided above the valve core, and the upper end of the spring passes through the first center hole in the first valve seat, a buffer pad is provided between the first valve seat and the outer shell, a second valve seat is provided at the bottom of the valve core, a sealing ball hole is provided at the bottom of the valve core, and a sealing ball is installed in the sealing ball hole in an interference fit manner. The utility model adopts a small stroke design, which greatly shortens the action process of the one-way valve, can achieve millisecond-level control, and greatly improves the control accuracy of the electric hydraulic valve actuator.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic one-way valves, in particular to a normally closed electromagnetic one-way valve of an electric hydraulic valve actuator. Background Art

[0002] During the operation of the electro-hydraulic valve actuator, it is necessary to control the opening and closing of its hydraulic circuit to cooperate with the operation of the hydraulic system. However, the traditional electromagnetic check valve is large in size and complex in structure, and the valve core has a large stroke, which leads to slow movement and large impact. Therefore, the traditional electromagnetic check valve is not suitable for electro-hydraulic valve actuators, and a more suitable electromagnetic check valve needs to be redesigned according to the characteristics of the electro-hydraulic valve actuator.

[0003] In response to this, the applicant proposed a normally closed electromagnetic one-way valve for an electric hydraulic valve actuator. Utility Model Content

[0004] The utility model aims to provide a normally closed electromagnetic one-way valve of an electric hydraulic valve actuator, aiming to improve the existing problems.

[0005] The utility model is achieved in this way:

[0006] A normally closed electromagnetic one-way valve of an electric hydraulic valve actuator comprises a shell, a coil frame, an electromagnetic coil and a valve core, wherein the electromagnetic coil is wound on the coil frame, the valve core is installed in the center hole of the coil frame, the coil frame is sleeved in the outer frame, a spring hole is opened inside the upper end of the valve core, a spring is arranged in the spring hole, the bottom of the spring contacts the bottom end of the spring hole, a first valve seat is arranged above the valve core, and the upper end of the spring passes through the first center hole in the first valve seat, a buffer pad is arranged between the first valve seat and the shell, and a first valve seat is arranged at the bottom of the valve core. Two valve seats, and a sealing ball hole is opened at the bottom of the valve core, and a sealing ball is installed in the sealing ball hole with interference fit, a second valve seat inner hole is arranged in the middle of the second valve seat, a sealing gasket is installed below the second valve seat, and a sealing valve plate is arranged between the sealing gasket and the second valve seat, the sealing valve plate is installed in the second valve seat inner hole with interference fit, and a center hole is arranged in the middle of the sealing valve plate, two oil guide channels are arranged on the second valve seat, and side grooves are arranged on the outer periphery of the second valve seat, an annular groove is arranged on the sealing valve plate, and a fastener connected to the shell is arranged at the bottom of the sealing gasket.

[0007] Furthermore, a top boss is provided on the top of the outer frame, and the top boss passes through one of the waist holes of the first valve seat and the top opening of the shell to the outside of the electromagnetic switch valve.

[0008] Furthermore, a lower boss is provided on the bottom of the outer frame extending downward, and a plurality of vertical bosses are provided on the bottom periphery of the outer frame.

[0009] Furthermore, a first inlet and outlet wire channel and a second inlet and outlet wire channel are provided on the top of the coil frame, and the inlet and outlet wires of the electromagnetic coil enter through the first inlet and outlet wire channel and are led out through the second inlet and outlet wire channel. A frame boss is provided between the second inlet and outlet wire channels, and the setting position of the frame boss is consistent with the setting position of the top boss of the external frame.

[0010] Furthermore, side grooves are provided on opposite sides of the side edges of the first valve seat.

[0011] Furthermore, two side grooves are arranged on opposite sides, and any side groove can form a limiting device with the lower boss at the bottom of the outer frame.

[0012] Furthermore, a downwardly protruding center hole platform is provided on the inner hole of the second valve seat, and a copper sleeve is installed in the center hole platform.

[0013] Furthermore, an annular inner groove is provided at the top end of the valve core, and a copper ring is installed in the annular inner groove.

[0014] Furthermore, the sealing valve plate body is a valve plate body, and the valve plate body has a certain degree of softness.

[0015] Furthermore, the fastener is assembled with the housing to form an integrated metal housing.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] In this utility model;

[0018] 1. The utility model adopts a small stroke design, which greatly shortens the action process of the one-way valve, can achieve millisecond-level control, and greatly improves the control accuracy of the electric hydraulic valve actuator.

[0019] 2. The structural design of the utility model combines the structural characteristics of the electric hydraulic valve actuator and can be installed quickly and reliably without complicated connecting parts.

[0020] 3. The utility model adds a shock-absorbing design on the basis of a small stroke, which further reduces the impact when the electromagnetic one-way valve is opened and closed, and helps to extend the life of the electromagnetic one-way valve and the electric hydraulic valve actuator.

[0021] 4. The solenoid valve core of the utility model adopts a demagnetization design, which can better avoid the magnetization caused by the influence of the magnetic field after the valve core works for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is an exploded diagram of a normally closed electromagnetic one-way valve of an electric hydraulic valve actuator of the utility model;

[0024] Figure 2 It is a cross-sectional view of a normally closed electromagnetic one-way valve of an electric hydraulic valve actuator shown in the utility model;

[0025] Figure 3 It is a schematic diagram of the housing of a normally closed electromagnetic one-way valve of an electric hydraulic valve actuator shown in the utility model;

[0026] Figure 4 It is a schematic diagram of a first valve seat of a normally closed electromagnetic one-way valve of an electric hydraulic valve actuator shown in the utility model;

[0027] Figure 5 This is a schematic diagram of the outer frame of a normally closed electromagnetic one-way valve of an electric hydraulic valve actuator shown in the utility model. Figure 1 ;

[0028] Figure 6 It is a front view of the outer frame of a normally closed electromagnetic one-way valve of an electric hydraulic valve actuator shown in the utility model;

[0029] Figure 7 It is a bottom view of the outer frame of a normally closed electromagnetic one-way valve of an electric hydraulic valve actuator shown in the utility model;

[0030] Figure 8 This is a schematic diagram of the outer frame of a normally closed electromagnetic one-way valve of an electric hydraulic valve actuator shown in the utility model. Figure 2 ;

[0031] Fig. 9 It is a schematic diagram of a coil skeleton of a normally closed electromagnetic one-way valve of an electric hydraulic valve actuator shown in the utility model;

[0032] Fig.10 It is a schematic diagram of a valve core of a normally closed electromagnetic one-way valve of an electric hydraulic valve actuator shown in the utility model;

[0033] Fig.11 It is a cross-sectional view of a valve core of a normally closed electromagnetic one-way valve of an electric hydraulic valve actuator shown in the utility model;

[0034] Fig.12 It is a schematic diagram of a first valve seat of a normally closed electromagnetic one-way valve of an electric hydraulic valve actuator shown in the utility model;

[0035] Fig.13 It is a schematic diagram of a sealing valve plate of a normally closed electromagnetic one-way valve of an electric hydraulic valve actuator shown in the utility model;

[0036] Fig.14 It is a schematic diagram of a sealing gasket of a normally closed electromagnetic one-way valve of an electric hydraulic valve actuator shown in the utility model;

[0037] Fig.15 It is a schematic diagram of a fastener of a normally closed electromagnetic one-way valve of an electric hydraulic valve actuator shown in the utility model.

[0038] In the figure: 1. shell; 2. buffer pad; 3. first valve seat; 31. waist hole; 32. first center hole; 34. side groove; 4. spring; 5. outer frame; 51. vertical slot hole; 52. lower boss; 53. top boss; 54. annular boss; 55. mounting ring; 56. first boss; 57. second boss; 6. coil frame; 61. outlet channel 1; 62. inlet channel 1; 63. frame boss; 64. conduct channel 2; 65. outgoing channel 2; 66. line channel boss; 67. partition protrusion; 68. first side boss; 69. second side boss; 7. electromagnetic coil ;8. Valve core;81. Annular inner groove;82. Spring hole;83. Sealing ball hole;9. Sealing ball;10. Copper sleeve;11. Second valve seat;111. Side groove;112. Center hole platform;113. Inner hole;114. Oil guide channel;12. Sealing valve plate;121. Annular groove;122. Sealing ball inner hole;123. Sealing valve plate side platform;13. Sealing gasket;131. Sealing gasket hole;132. Sealing gasket hole platform;133. Waist-shaped oil guide hole;134. Arc-shaped ring platform;14. Fasteners;141. Oil inlet;142. Oil outlet;143. Outer boss;15. Copper ring. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0040] For details, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Fig.10 , Fig.11 , Fig.12 , Fig.14As shown, a normally closed electromagnetic one-way valve of an electric hydraulic valve actuator includes a housing 1, a coil skeleton 6, an electromagnetic coil 7 and a valve core 8, the electromagnetic coil 7 is wound on the coil skeleton 6, the valve core 8 is installed in the center hole of the coil skeleton 6, the coil skeleton 6 is sleeved in the outer skeleton 5, a spring hole 82 is opened inside the upper end of the valve core 8, and a spring 4 is arranged in the spring hole 82, the bottom of the spring 4 contacts the bottom end of the spring hole 82, a first valve seat 3 is arranged above the valve core 8, and the upper end of the spring 4 passes through the first center hole 32 in the first valve seat 3, the first valve seat A side groove 34 is provided on the side opposite to the first valve seat 3, a buffer pad 2 is provided between the first valve seat 3 and the housing 1, a second valve seat 11 is provided at the bottom of the valve core 8, a sealing ball hole 83 is provided at the bottom of the valve core 8, and a sealing ball 9 is installed in the sealing ball hole 83, an annular inner groove 81 is provided at the top of the valve core 8, and a copper ring 15 is installed in the annular inner groove 81, a second valve seat inner hole 113 is provided in the middle of the second valve seat 11, a sealing gasket 13 is installed below the second valve seat 11, and a sealing valve plate 12 is provided between the sealing gasket 13 and the second valve seat 11, and the sealing valve The valve disc 12 is interference-fitted in the inner hole 113 of the second valve seat, and a center hole 122 is provided in the middle of the sealing valve disc 12, two oil guide channels 114 are provided on the second valve seat 11, and a side groove 111 is provided on the outer periphery of the second valve seat 11, and an annular groove 121 is provided on the sealing valve disc 12, the main body of the sealing valve disc 12 is a valve disc main body 123, and the valve disc main body 123 has a certain degree of softness, and two side grooves 111 are provided on the opposite side, and any side groove 111 can form a limiting device with the lower boss 52 at the bottom of the outer frame 5, through the second valve The side groove 111 on the seat cooperates with the lower boss 52 on the outer frame 5 to form a limiting device, which facilitates the positioning of the second valve seat 11 during use to better achieve a tight fit and a normally closed state. A downwardly protruding center hole platform 112 is provided on the inner hole 113 of the second valve seat 11, and a copper sleeve 10 is installed in the center hole platform 112. The side groove is provided on the side of the first valve seat 3 for facilitating positioning during installation on the one hand, and on the other hand, it can achieve the overall internal limitation. A fastener 14 connected to the outer shell 1 is provided at the bottom of the sealing gasket 13.

[0041] Please refer to Figure 1 and Fig.15 As shown, the fastener 14 and the shell 1 are installed and combined into an integrated metal shell. The conductive effect of the shell can reduce the interference of the external magnetic field on the inside of the solenoid valve to maintain its working stability and accuracy. Outer bosses 143 are provided on both sides of the fastener 14 to facilitate riveting with the side of the shell 1 or other fastener combination limiting.

[0042] Please refer to Figure 5 , Figure 6 , Figure 7 , Figure 8 and Fig. 9As shown, a top boss 53 is provided at the top of the exoskeleton 5, and the top boss 53 passes through one of the waist holes 114 of the second valve seat 11 and the top opening of the shell 1 to the outside of the electromagnetic switch valve, and a lower boss 52 is provided on the bottom of the exoskeleton 5, and a plurality of vertical bosses 51 are provided on the bottom circumference of the exoskeleton 5. A plurality of vertical bosses 51 are provided on the outer circumference of the bottom to achieve interference fit with the shell 1 at local contact points during installation to avoid shaking of the valve body during operation. A mounting ring 54 is provided on the inner side of the bottom of the exoskeleton 5, and an arc-shaped boss 55 extending inward is provided below the mounting ring 54. When installing, at least two or more first side bosses 68 are provided on the lower side of the coil skeleton 6, which realize axial limitation together with the annular boss 54 at the bottom of the exoskeleton during installation, and there are also two or more bosses 69 on the lower side of the coil skeleton 6, which are inserted into the arc-shaped boss 55 inside the exoskeleton 5 during installation to achieve secondary limitation.

[0043] Please refer to Figure 1 , Figure 7 and Fig. 9 As shown, the top of the coil skeleton 6 is provided with a first inlet and outlet wire channel and a second inlet and outlet wire channel. The inlet and outlet wires of the electromagnetic coil 7 enter through the first inlet and outlet wire channel and are led out through the second inlet and outlet wire channel. The first inlet and outlet wire channel includes an outlet wire channel 2 64 and an inlet wire channel 2 65. The second inlet and outlet wire channel includes an outlet wire channel 1 61 and an inlet wire channel 1 62. A skeleton boss 63 is provided between the second inlet and outlet wire channels, and the setting position of the skeleton boss 63 is consistent with the setting position of the top boss 53 of the outer skeleton 5. The skeleton boss 63 between the outlet wire channel 1 61 and the inlet wire channel 1 62 of the second inlet and outlet wire channel is inserted into the outer skeleton. The inner hole of the top boss 53 of the frame 5, and then the input and output lines are led out to the outside of the electromagnetic switch valve. The top of the coil skeleton 6 is provided with a partition protrusion 67 which is inserted into the gap formed by the two second protrusions 57 on the inner side of the top of the outer skeleton 5. At the same time, the two wire channel bosses 66 on the top of the coil skeleton 6 are respectively inserted into the gaps formed between the two first protrusions 56 and the two second protrusions 57 on the inner side of the top of the outer skeleton 5, forming a double limit together, placing the electromagnetic coil and the skeleton to rotate along the axial direction inside the electromagnetic switch valve. During the setting process, the setting positions and shapes of the protrusions and bosses can be matched according to different products.

[0044] Working principle:

[0045] 1. When the electromagnetic one-way valve is not powered, the spring 4 pushes the valve core 8 and the sealing ball 9 downward, and the sealing ball 9 contacts the upper edge of the central hole 122 of the sealing valve plate 12 to achieve sealing. The sealing valve plate 12 is designed with an annular groove 121, and the valve plate body 123 is made of flexible material, so that the valve plate has a certain degree of flexibility and can be slightly deformed under the action of the spring to achieve a better sealing effect. That is, the normally closed function.

[0046] 2. When the electromagnetic one-way valve is powered on, the electromagnetic coil 7 generates a magnetic field, which generates an upward electromagnetic force on the valve core 8, thereby compressing the spring 4, and the electromagnetic valve is opened. The liquid flows through the gap formed between the sealing ball 9 and the sealing valve plate 12 through the oil inlet 141, and then flows to the two oil guide channels 114 through the oil guide channel opened on the central hole platform 112 on the second valve seat 11, and then flows out through the two oil guide holes 133 on the sealing gasket 13 and the two oil outlets 142 on the fastener 14. The valve is opened.

[0047] 3. The design of eliminating magnetization and the small stroke of the open and closed positions of the one-way valve, less than 1mm, make the valve respond very quickly.

[0048] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A normally closed electromagnetic check valve of an electric hydraulic valve actuator, comprising a housing (1), a coil frame (6), an electromagnetic coil (7) and a valve core (8), characterized in that: The electromagnetic coil (7) is wound on a coil frame (6), the valve core (8) is installed in the center hole of the coil frame (6), the coil frame (6) is sleeved in the outer frame (5), a spring hole (82) is opened inside the upper end of the valve core (8), and a spring (4) is arranged in the spring hole (82), the bottom of the spring (4) contacts the bottom end of the spring hole (82), a first valve seat (3) is arranged above the valve core (8), and the upper end of the spring (4) passes through the first center hole (32) in the first valve seat (3), a buffer pad (2) is arranged between the first valve seat (3) and the outer shell (1), a second valve seat (11) is arranged at the bottom of the valve core (8), and a sealing ball hole (83) is opened at the bottom of the valve core (8), and the sealing ball hole (83) is ), a sealing ball (9) is interference-mounted in the second valve seat (11), a second valve seat inner hole (113) is provided in the middle of the second valve seat (11), a sealing gasket (13) is installed below the second valve seat (11), and a sealing valve plate (12) is provided between the sealing gasket (13) and the second valve seat (11), the sealing valve plate (12) is interference-mounted in the second valve seat inner hole (113), and a center hole (122) is provided in the middle of the sealing valve plate (12), two oil guide channels (114) are provided on the second valve seat (11), and a side groove (111) is provided on the outer periphery of the second valve seat (11), an annular groove (121) is provided on the sealing valve plate (12), and a fastener (14) connected to the housing (1) is provided at the bottom of the sealing gasket (13).

2. The normally closed electromagnetic one-way valve of the electric hydraulic valve actuator according to claim 1, characterized in that: A top boss (53) is provided on the top of the outer frame (5), and the top boss (53) passes through one of the waist holes (31) of the first valve seat (3) and the top opening of the outer shell (1) to the outside of the electromagnetic switch valve.

3. The normally closed electromagnetic one-way valve of the electrohydraulic valve actuator according to claim 2, characterized in that: A lower boss (52) is provided on the bottom of the outer frame (5) extending downward, and a plurality of vertical bosses (51) are provided on the bottom circumference of the outer frame (5).

4. The normally closed electromagnetic one-way valve of the electrohydraulic valve actuator according to claim 3, characterized in that: A first inlet and outlet wire channel and a second inlet and outlet wire channel are provided at the top of the coil frame (6); the inlet and outlet wires of the electromagnetic coil (7) enter through the first inlet and outlet wire channel and are led out through the second inlet and outlet wire channel; a frame boss (63) is provided between the second inlet and outlet wire channels, and the setting position of the frame boss (63) is consistent with the setting position of the top boss (53) of the external frame (5).

5. The normally closed electromagnetic one-way valve of the electro-hydraulic valve actuator according to claim 4, characterized in that: Side grooves (34) are provided on opposite sides of the side edges of the first valve seat (3).

6. The normally closed electromagnetic one-way valve of an electrohydraulic valve actuator according to claim 1, characterized in that: Two side slots (111) are arranged on opposite sides, and any one of the side slots (111) can form a limiting device with the lower boss (52) at the bottom of the outer frame (5).

7. The normally closed electromagnetic one-way valve of the electro-hydraulic valve actuator according to claim 6, characterized in that: A downwardly protruding central hole platform (112) is provided on the inner hole (113) of the second valve seat (11), and a copper sleeve (10) is installed in the central hole platform (112).

8. A normally closed electromagnetic one-way valve for an electro-hydraulic valve actuator according to any one of claims 1 to 7, characterized in that: An annular inner groove (81) is provided at the top end of the valve core (8), and a copper ring (15) is installed in the annular inner groove (81).

9. The normally closed electromagnetic one-way valve of the electro-hydraulic valve actuator according to claim 8, characterized in that: The main body of the sealing valve plate (12) is a valve plate main body (123), and the valve plate main body (123) has a certain degree of softness.

10. The normally closed electromagnetic one-way valve of the electro-hydraulic valve actuator according to claim 9, characterized in that: The fastener (14) and the housing (1) are assembled and combined to form an integrated metal housing.

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