Normally open electromagnetic one-way valve of electro-hydraulic valve actuator

Abstract

The utility model discloses a normally open electromagnetic one-way valve of an electric hydraulic valve actuator, which comprises a shell, a valve core assembly, a coil framework and an electromagnetic coil, the valve core assembly consists of a valve core, a spring mounting plate, a spring and a movable inner core, the electromagnetic coil is wound on the coil framework, the valve core assembly is mounted in a central hole of the coil framework, and the movable inner core is mounted in the shell. The coil framework is arranged in the outer framework in a sleeved mode, an annular inner groove is formed in the valve element, a copper ring is installed in the annular inner groove, a movable inner core is installed in the valve element, and a spring installation plate is arranged on the movable inner core in a sleeved mode. The one-way valve is simple in structure, adopts the structure of the upper valve seat and the lower valve seat, adopts the design of small stroke in the using process, enables the action process of the one-way valve to be greatly shortened, combines the structural characteristics of an electric hydraulic valve actuator in the structural design, and can be rapidly and reliably installed without complex connecting pieces.

Description

Technical Field

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

[0002] During the working process 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 the electro-hydraulic valve actuator, 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 open electromagnetic one-way valve for an electric hydraulic valve actuator. Utility Model Content

[0004] The utility model aims to provide a normally open 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 open electromagnetic one-way valve of an electric hydraulic valve actuator comprises a housing, a valve core assembly, a coil frame, and an electromagnetic coil. The valve core assembly is composed of a valve core, a spring mounting plate, a spring, and a moving inner core. The electromagnetic coil is wound on the coil frame, and the valve core assembly is installed in the center hole of the coil frame. The coil frame is sleeved in the outer frame. An annular inner groove is provided in the valve core, and a copper ring is installed in the annular inner groove. A movable moving inner core is installed in the valve core, and a spring mounting plate is sleeved on the moving inner core. A spring is provided below the spring mounting plate, and the spring is sleeved on the outer side of the moving inner core. The valve core assembly A first valve seat is arranged above the assembly, and the valve core assembly passes through the first center hole in the first valve seat, a buffer pad is arranged between the first valve seat and the shell, a second valve seat is arranged at the bottom of the valve core assembly, and a supporting spring for support is arranged between the second valve seat and the valve core, a second valve seat inner hole is arranged in the middle of the second valve seat, and a sealing valve plate is tightly installed on the second valve seat inner hole, a sealing ball is arranged between the second center hole opened in the middle of the sealing valve plate and the sealing ball inner hole opened in the middle of the second valve seat, a sealing gasket is installed below the second valve seat, 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 arranged 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 arranged 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, and the second inlet and outlet wire channel.

[0010] Furthermore, an oil guide channel is arranged on the side of the inner hole of the sealing ball of the second valve seat, and two oil guide holes for oil outlet are arranged on the seat plate of the second valve seat, and a notch is also arranged on the outer edge of the second valve seat.

[0011] Furthermore, the inner hole of the second valve seat is provided with a plurality of raised seats which are interference fit with the annular groove of the sealing valve plate.

[0012] Furthermore, the valve core is provided with an upper through hole and a lower through hole from top to bottom, and the inner diameter of the upper through hole is larger than the inner diameter of the lower through hole.

[0013] Furthermore, a first center hole platform protruding downward is provided on the center hole of the first valve seat, and a copper sleeve is installed in the first center hole platform, and two waist holes are opened on the opposite sides of the first valve seat.

[0014] Furthermore, the supporting spring is provided with a supporting ring, and two spring arms extending laterally toward the center are provided in the supporting ring, and spring contacts are provided at the top ends of the spring arms.

[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 open 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 open 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 open 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 second valve seat of a normally open 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 open 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 open 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 open 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 open 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 open 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 open 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 open 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 open 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 open 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 open 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 open electromagnetic one-way valve of an electric hydraulic valve actuator shown in the utility model;

[0038] Fig.16 The utility model is a schematic diagram of a supporting spring structure of a normally open electromagnetic one-way valve of an electric hydraulic valve actuator.

[0039] In the figure: 1, shell; 2, buffer pad; 3, second valve seat; 31, oil guide hole; 32, second valve seat inner hole; 33, oil guide channel; 34, sealing ball inner hole; 35, notch; 36, raised seat; 4, spring; 5, outer frame; 51, vertical boss; 52, lower boss; 53, top boss; 54, mounting ring; 55, arc boss; 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. Upper through hole; 83. Lower through hole; 9. Sealing ball; 10. Copper sleeve; 11. First valve seat; 111. Side positioning groove; 112. First center hole platform; 113. First center hole; 114. Waist hole; 12. Sealing valve plate; 121. Annular groove; 122. Second center 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. Fastener; 141. Oil inlet; 142. Oil outlet; 143. Outer boss; 15. Copper ring; 16. Spring mounting plate; 17. Moving valve core; 18. Support spring; 181. Support ring; 182. Spring arm; 183. Spring contact. DETAILED DESCRIPTION

[0040] 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.

[0041] For details, please refer to Figure 1 , Figure 2 , Figure 3 , Fig.10 and Fig.11 As shown, a normally open electromagnetic one-way valve of an electric hydraulic valve actuator comprises a housing 1, a valve core assembly, a coil skeleton 6, and an electromagnetic coil 7, characterized in that the valve core assembly comprises a valve core 8, a spring mounting plate 16, a spring 4, and a moving inner core 17, the electromagnetic coil 7 is wound on the coil skeleton 6, the valve core assembly is mounted in the center hole of the coil skeleton 6, the coil skeleton 6 is sleeved in the outer skeleton 5, an annular inner groove 81 is arranged in the valve core 8, and a copper ring 15 is installed in the annular inner groove 81, a movable moving inner core 17 is installed in the valve core 8, and a spring mounting plate 16 is sleeved on the moving inner core 17, a spring 4 is arranged below the spring mounting plate 16, and the spring 4 is sleeved on the outside of the moving inner core 17, a rivet head limit spring mounting plate 16 is arranged on the top of the moving inner core 17 and cannot be separated, and the spring 4 can be compressed by the spring mounting plate 16, the valve core 8 is provided with an upper through hole 82 and a lower through hole 83 from top to bottom, and the inner diameter of the upper through hole 82 is larger than the inner diameter of the lower through hole 83,

[0042] Please refer to Figure 1 , Figure 2 , Fig.12 and Fig.13As shown, a first valve seat 11 is arranged above the valve core assembly, and the valve core assembly passes through the first center hole 113 in the first valve seat 11, a buffer pad 2 is arranged between the first valve seat 11 and the shell 1, a first center hole platform 112 protruding downward is arranged on the center hole 113 of the first valve seat 11, and a copper sleeve 10 is installed in the first center hole platform 112, two waist holes 114 are arranged on the opposite sides of the first valve seat 11, and the copper sleeve 10 is installed on the first valve seat 11, which can better provide guidance and lubrication for the valve core 8, and any one of the two waist holes 114 can be used as a threading hole for the inlet and outlet wires of the electromagnetic coil, and a side positioning groove 111 is arranged on the outer circumference of the first valve seat 11, and the side positioning groove 111 is convenient for limiting and taking during assembly, and a second valve seat 3 is arranged at the bottom of the valve core assembly, and a supporting spring 18 for support is arranged between the second valve seat 3 and the valve core 8.

[0043] Please refer to Fig.16 As shown, the support spring 18 is provided with a support ring 181 , and two spring arms 182 extending laterally toward the center are provided in the support ring 181 , and a spring contact 183 is provided at the top of the spring arm 182 .

[0044] Please refer to Figure 4 , Fig.12 , Fig.13 , Fig.14 and Fig.15 As shown, a second valve seat inner hole 32 is provided in the middle of the second valve seat 3, and a sealing valve disc 12 is tightly installed on the second valve seat inner hole 32, a sealing ball 9 is provided between the second center hole 122 opened in the middle of the sealing valve disc 12 and the sealing ball inner hole 34 opened in the middle of the second valve seat 3, a sealing gasket 13 is installed below the second valve seat 3, and a fastener 14 connected to the shell 1 is provided at the bottom of the sealing gasket 13, the fastener 14 and the shell 1 are installed and combined into an integrated metal shell, and 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, and outer bosses 143 are provided on both sides of the fastener 14 for easy riveting with the side of the shell 1 Or other fastener combination limiters can be used to combine the sealing ball 9 with the second center hole 122 and the sealing ball inner hole 34 to form a valve seat sealing combination structure of a one-way valve. An oil guide channel 33 is arranged on the side of the sealing ball inner hole 34 of the second valve seat 3, and two oil guide holes 31 for oil outlet are arranged on the seat plate of the second valve seat 3. A notch 35 is also arranged on the outer edge of the second valve seat 3. The opposite sides of the two notches 35 are arranged on the outer periphery of the second valve seat 3. Any notch 35 can cooperate with the lower boss 52 at the bottom of the outer bracket 5 to form a limiting device, which is convenient for positioning the second valve seat 3 in a suitable position. The second valve seat inner hole 32 is provided with a plurality of raised seats 36 that are interference fit with the annular groove 121 of the sealing valve plate 12.

[0045] Please refer to Figure 5 , Figure 6 , Figure 7 , Figure 8 and Fig. 9 As 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 first 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. At least two or more first side bosses 68 are provided on the lower side of the coil skeleton 6 during installation, 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.

[0046] 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.

[0047] Working principle:

[0048] 1. When the electromagnetic one-way valve is powered on, the electromagnetic coil 7 generates a magnetic field, which exerts a downward thrust on the valve core assembly composed of the valve core 8, the spring mounting plate 16, the spring 4 and the moving inner core 17, pushing the valve core assembly downward. After the support spring 18 is deformed, it continues to push the sealing ball 9 to contact the upper edge of the second center hole 122 of the sealing valve plate 12 to achieve sealing. In the process of pushing the sealing ball 9 to continue to move downward, the spring 4 is compressed. An annular groove 121 is designed on the sealing valve plate 12, 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.

[0049] 2. When the electromagnetic one-way valve is powered off, the magnetic field generated by the electromagnetic coil 7 disappears, and the corresponding thrust disappears. Under the action of the supporting spring 18, the valve core assembly consisting of the valve core 8, the spring mounting plate 16, the spring 4 and the moving inner core 17 separates from the sealing ball 9 and returns to the initial position. The spring 4 also returns to the preset state, 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 holes 31 through the oil guide channel 33 on the second valve seat 3, 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.

[0050] 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.

[0051] 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 open electromagnetic one-way valve of an electric hydraulic valve actuator, comprising a housing (1), a valve core assembly, a coil skeleton (6), and an electromagnetic coil (7), characterized in that: The valve core assembly is composed of a valve core (8), a spring mounting plate (16), a spring (4), and a moving inner core (17). The electromagnetic coil (7) is wound on a coil frame (6). The valve core assembly is installed in the center hole of the coil frame (6). The coil frame (6) is sleeved in an outer frame (5). An annular inner groove (81) is provided in the valve core (8), and a copper ring (15) is installed in the annular inner groove (81). A movable moving inner core (17) is installed in the valve core (8), and a spring mounting plate (16) is sleeved on the moving inner core (17). A spring (4) is provided below the spring mounting plate (16), and the spring (4) is sleeved on the outer side of the moving inner core (17). A first valve seat (11) is provided above the valve core assembly, and the valve core assembly passes through the first valve seat ( 11), a buffer pad (2) is provided between the first valve seat (11) and the housing (1), a second valve seat (3) is provided at the bottom of the valve core assembly, and a supporting spring (18) is provided between the second valve seat (3) and the valve core (8) for support, a second valve seat inner hole (32) is provided in the middle of the second valve seat (3), and a sealing valve plate (12) is tightly installed on the second valve seat inner hole (32), a sealing ball (9) is provided between a second center hole (122) opened in the middle of the sealing valve plate (12) and a sealing ball inner hole (34) opened in the middle of the second valve seat (3), a sealing gasket (13) is installed below the second valve seat (3), and a fastener (14) connected to the housing (1) is provided at the bottom of the sealing gasket (13).

2. The normally open electromagnetic one-way valve of the electrohydraulic 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 (114) of the first valve seat (11) and the top opening of the outer shell (1) to the outside of the electromagnetic switch valve.

3. The normally open electromagnetic one-way valve of the electric hydraulic 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 open electromagnetic one-way valve of the electric hydraulic 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 arranged on 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 arranged 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 outer frame (5), the second inlet and outlet wire channel.

5. The normally open electromagnetic one-way valve of the electric hydraulic valve actuator according to claim 1, characterized in that: An oil guide channel (33) is arranged on the side of the inner hole (34) of the sealing ball of the second valve seat (3), and two oil guide holes (31) for oil outlet are arranged on the seat plate of the second valve seat (3), and a notch (35) is also arranged on the outer edge of the second valve seat (3).

6. The normally open electromagnetic one-way valve of the electrohydraulic valve actuator according to claim 5, characterized in that: The inner hole (32) of the second valve seat is provided with a plurality of raised seats (36) which are interference-fitted with the annular groove (121) of the sealing valve plate (12).

7. The normally open electromagnetic one-way valve of an electrohydraulic valve actuator according to claim 1, characterized in that: The valve core (8) is provided with an upper through hole (82) and a lower through hole (83) from top to bottom, and the inner diameter of the upper through hole (82) is larger than the inner diameter of the lower through hole (83).

8. The normally open electromagnetic one-way valve of an electro-hydraulic valve actuator according to claim 1, characterized in that: A first central hole platform (112) protruding downward is provided on the central hole (113) of the first valve seat (11), and a copper sleeve (10) is installed in the first central hole platform (112). Two waist holes (114) are provided on opposite sides of the first valve seat (11).

9. The normally open electromagnetic one-way valve of an electrohydraulic valve actuator according to claim 1, characterized in that: The supporting spring (18) is provided with a supporting ring (181), and two spring arms (182) extending laterally toward the center are provided in the supporting ring (181), and a spring contact (183) is provided at the top of the spring arm (182).

10. A normally open electromagnetic one-way valve for an electric hydraulic valve actuator according to any one of claims 1 to 9, characterized in that: The fastener (14) and the housing (1) are assembled and assembled into an integrated metal housing.

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