Isolation type electromagnetic valve

Abstract

The utility model relates to the technical field of electromagnetic valves, in particular to an isolated electromagnetic valve which comprises a valve body. The piston assembly comprises a piston seat and a piston head which are arranged in the valve body; the mounting seat is fixedly connected with the valve body; one end, penetrating through the mounting seat and the piston seat, of the valve core is propped against the piston head; the first elastic piece is arranged at the end, away from the piston head, of the valve element and drives the valve element to abut against the piston head. The deformation memory alloy is arranged at the end, away from the piston head, of the valve element. A partition plate is arranged in an installation groove, used for installing the piston head, of the piston seat, a plurality of elastic poking pieces are arranged at the position, close to the center edge, of the partition plate, the elastic poking pieces are obliquely arranged towards the piston head, and an annular groove for supporting and driving the elastic poking pieces to gather inwards is formed in the outer cylindrical face of the end, close to the piston head, of the valve element. The through hole of the piston seat is blocked through the cooperation of the elastic shifting piece and the annular groove, a medium is prevented from entering the electromagnetic valve, the effective sealing effect is achieved, and the service life of the electromagnetic valve is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of solenoid valves, in particular to an isolation type solenoid valve. Background Art

[0002] Solenoid valves are electromagnetically controlled industrial devices, essential automation components for controlling fluids. They are actuators, not limited to hydraulic or pneumatic systems. They are used in industrial control systems to adjust the direction, flow, speed, and other parameters of media. Solenoid valves can be combined with various circuits to achieve the desired control.

[0003] The valve core of a conventional normally closed solenoid valve utilizes a shape memory alloy to move upward, opening the liquid passageway in the valve body. However, some media can enter the solenoid valve through the gap between the valve core and the piston seat, seriously affecting its normal operation. Furthermore, when handling highly viscous media, the high-viscosity media can easily adhere to the valve core, causing the solenoid valve to become clogged and subsequently paralyzed, posing a significant safety hazard. Utility Model Content

[0004] The technical problem to be solved by the present invention is to provide an isolated solenoid valve to effectively solve the problems in the background technology.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: an isolated solenoid valve, comprising:

[0006] a valve body having a liquid inlet and a liquid outlet;

[0007] A piston assembly includes a piston seat disposed in the valve body and a piston head slidably disposed in the piston seat;

[0008] A mounting seat is provided above the piston assembly and is fixedly connected to the valve body;

[0009] A valve core is placed in the center hole of the mounting seat, passes through the mounting seat and one end of the piston seat abuts against the piston head;

[0010] a first elastic member, provided at an end of the valve core away from the piston head, for driving the valve core to abut against the piston head to close the valve body;

[0011] A deformation memory alloy is provided at an end of the valve core away from the piston head, and is used to drive the valve core to move in a direction away from the valve body to open the valve body;

[0012] In which, the piston seat is used to install the mounting groove of the piston head, and a partition is provided in the mounting groove. The partition is provided with multiple elastic paddles near the center edge, and the elastic paddles are inclined toward the direction of the piston head. The outer cylindrical surface of the valve core near one end of the piston head is provided with an annular groove that supports and drives the elastic paddles to gather inward.

[0013] Furthermore, the diameter of the shaft section below the annular groove is larger than the diameter of the shaft section above the annular groove.

[0014] Furthermore, a conical surface is provided at the end of the valve core, and the conical surface abuts against the central hole of the piston head.

[0015] Furthermore, a protective cover is provided on the outer side of the mounting seat.

[0016] Furthermore, a first sealing ring is provided on the contact surface between the protective cover and the mounting seat.

[0017] Furthermore, the protective sleeve includes an outer sleeve and a top plate, the outer sleeve is sleeved on the outside of the mounting seat, and the top plate is fixed above the outer sleeve;

[0018] A through slot for the deformation memory alloy to extend out is provided above the outer sleeve.

[0019] Furthermore, a step groove is provided on the top of the outer sleeve, and a sealing plate is provided in the step groove;

[0020] A second sealing ring is provided on the contact surface between the sealing plate and the step groove.

[0021] Furthermore, a third sealing ring is provided on the contact surface between the valve body and the mounting seat.

[0022] Furthermore, the piston seat is connected to the corresponding mounting hole of the valve body through threads.

[0023] Furthermore, the mounting seat is provided with a central sliding groove, and the valve core is placed in the central sliding groove.

[0024] The beneficial effects of the utility model are as follows: the utility model blocks the through hole of the piston seat by setting a partition and utilizing the cooperation between the elastic pick and the annular groove on the valve core, thereby preventing the medium from entering the interior of the solenoid valve, playing an effective sealing role, ensuring the normal operation of the solenoid valve, and extending the service life of the solenoid valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 This is a cross-sectional view of an isolated solenoid valve in an embodiment of the present utility model;

[0027] Figure 2 for Figure 1 AA cross-sectional view;

[0028] Figure 3 for Figure 2 A local enlarged view of point B;

[0029] Figure 4 This is a schematic diagram of the internal structure of the mounting base in an embodiment of the present utility model;

[0030] Figure 5 This is a schematic diagram of the relative positions of the valve core and the partition in the embodiment of the present utility model;

[0031] Figure 6 Schematic diagram of the elastic pick embedded in the arc groove in the embodiment of the present utility model.

[0032] Figure numerals: 1. valve body; 2. piston seat; 3. piston head; 4. mounting seat; 5. valve core; 5a. annular groove; 5b. conical surface; 6. first elastic member; 7. deformation memory alloy; 8. partition; 8a. elastic paddle; 9. protective cover; 10. first sealing ring; 11. sealing plate; 12. second sealing ring; 13. third sealing ring. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0034] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit this invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0036] like Figures 1 to 6 The isolated solenoid valve shown includes: a valve body 1, a piston assembly, a mounting seat 4, a valve core 5, a first elastic member 6 and a deformation memory alloy 7. The valve body 1 has a liquid inlet and a liquid outlet; the piston assembly includes a piston seat 2 arranged in the valve body 1, and a piston head 3 slidably arranged in the piston seat 2; the mounting seat 4 is arranged above the piston assembly and fixedly connected to the valve body 1; the valve core 5 is placed in the center hole of the mounting seat 4, passes through the mounting seat 4 and one end of the piston seat 2 and abuts on the piston head 3; the first elastic member 6 is arranged at the end of the valve core 5 away from the piston head 3, driving the valve core 5 to abut on the piston head 3 to close the valve body 1; the deformation memory alloy 7 is arranged at the end of the valve core 5 away from the piston head 3, and is used to drive the valve core 5 to move in a direction away from the valve body 1 to open the valve body 1;

[0037] Among them, the piston seat 2 is used to install the piston head 3. A partition 8 is provided in the installation groove of the piston seat 2, and a plurality of elastic paddles 8a are provided near the center edge of the partition 8. The elastic paddles 8a are inclined toward the direction of the piston head 3. The outer cylindrical surface of the valve core 5 near one end of the piston head 3 is provided with an annular groove 5a that supports and drives the elastic paddles 8a to gather inward.

[0038] In the initial state, under the action of the first elastic member 6, the valve core 5 always keeps applying downward pressure to the piston head 3, and the valve body 1 is in a closed state at this time; and when power is turned on, the shape memory alloy deforms to drive the valve core 5 to lift upward, and when the annular groove 5a of the valve core 5 moves to a position close to the partition 8, the ends of multiple elastic paddles 8a will enter the annular groove 5a, and as the valve core 5 continues to move upward, the ends of multiple elastic paddles 8a will be synchronously driven to move upward, and the through hole formed by the ends of the multiple elastic paddles 8a for the valve core 5 to pass through is gathered inward, forming a blockage for the through hole of the piston seat 2. At the same time, the piston head 3 loses pressure, and under the action of liquid pressure, it gradually moves upward in the piston seat 2, so that the valve body 1 is opened.

[0039] The utility model provides a partition plate 8 and utilizes the cooperation between the elastic pick 8a and the annular groove 5a on the valve core 5 to block the through hole of the piston seat 2, thereby preventing the medium from entering the interior of the solenoid valve, playing an effective sealing role, ensuring the normal operation of the solenoid valve, and extending the service life of the solenoid valve.

[0040] In a preferred embodiment of the present invention, the diameter of the shaft section below the annular groove 5a is larger than the diameter of the shaft section above the annular groove 5a. As the valve core 5 moves upward, the large stepped surface below the annular groove 5a supports the multiple elastic paddles 8a, ensuring that the elastic paddles 8a can smoothly enter the annular groove 5a, thereby achieving a sealing effect.

[0041] In order to ensure that the valve core 5 applies uniform force to the piston head 3, a conical surface 5b is provided at the end of the valve core 5. The conical surface 5b abuts against the center hole of the piston head 3, further improving the reliability of the solenoid valve closing.

[0042] In the present utility model, the valve core 5 can slide in the mounting seat 4. In order to reduce the influence of sliding on the shape memory alloy 7, an avoidance groove is opened in the mounting seat 4, and the shape memory alloy is arranged on the side wall of the mounting seat 4. When the valve core 5 slides, the avoidance groove can allow the shape memory alloy to pass through. In order to further protect the internal components of the solenoid valve, a protective cover 9 is provided on the outside of the mounting seat 4, which effectively protects the first elastic member 6 and the shape memory alloy 7 in the solenoid valve, and prevents the external environment from affecting the normal operation of the solenoid valve.

[0043] Based on the above solution, a first sealing ring 10 is provided on the contact surface between the protective sleeve 9 and the mounting seat 4. The protective sleeve 9 also includes an outer sleeve and a top plate. The outer sleeve is sleeved on the outside of the mounting seat 4, and the top plate is fixed above the outer sleeve. A through groove for the deformation memory alloy 7 to extend is provided above the outer sleeve. A step groove is provided at the top of the outer sleeve, and a sealing plate 11 is provided in the step groove. Preferably, a second sealing ring 12 is provided on the contact surface between the sealing plate 11 and the step groove. The provision of the first sealing ring 10 and the second sealing ring 12 reduces the ingress of impurities or dust in the air, thereby improving the sealing effect.

[0044] In a preferred embodiment of the present invention, a third sealing ring 13 is provided on the contact surface between the valve body 1 and the mounting seat 4 to ensure a sealing effect between the mounting seat 4 and the valve body 1 .

[0045] In another preferred structure, in order to avoid affecting the position of the piston seat 2 when the piston is subjected to upward pressure, the piston seat 2 is connected to the corresponding mounting hole of the valve body 1 through threads, which can ensure the stability of the connection of the piston seat 2, thereby further ensuring the reliability of opening or closing the valve body 1.

[0046] The valve core 5 in the utility model has a longer driving rod. During use, in order to prevent the valve body 1 from being damaged, the mounting seat 4 is provided with a central slide groove, and the valve core 5 is placed in the central slide groove to ensure the centering accuracy during sliding and effectively prevent the middle position of the valve core 5 from bending or breaking.

[0047] Those skilled in the art should understand that the present invention is not limited to the above-described embodiments. The above-described embodiments and the specification are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. An isolation type solenoid valve, characterized in that: include: A valve body (1) having a liquid inlet and a liquid outlet; A piston assembly comprises a piston seat (2) arranged in the valve body (1), and a piston head (3) slidably arranged in the piston seat (2); A mounting seat (4) is arranged above the piston assembly and fixedly connected to the valve body (1); A valve core (5) is placed in the center hole of the mounting seat (4), passes through the mounting seat (4) and one end of the piston seat (2) and abuts against the piston head (3); A first elastic member (6) is provided at an end of the valve core (5) away from the piston head (3), and drives the valve core (5) to abut against the piston head (3) to close the valve body (1); a deformation memory alloy (7), arranged at an end of the valve core (5) away from the piston head (3), and used for driving the valve core (5) to move in a direction away from the valve body (1) to open the valve body (1); The piston seat (2) is provided with a partition (8) in a mounting groove for mounting the piston head (3); a plurality of elastic paddles (8a) are provided near the center edge of the partition (8); the elastic paddles (8a) are tilted toward the direction of the piston head (3); and an annular groove (5a) is provided on the outer cylindrical surface of one end of the valve core (5) near the piston head (3) to support and drive the elastic paddles (8a) to gather inward.

2. The isolated solenoid valve according to claim 1, characterized in that: The diameter of the shaft section below the annular groove (5a) is greater than the diameter of the shaft section above the annular groove (5a).

3. The isolated solenoid valve according to claim 1, characterized in that: The end of the valve core (5) is provided with a conical surface (5b), and the conical surface (5b) abuts against the central hole of the piston head (3).

4. The isolated solenoid valve according to claim 1, characterized in that: A protective cover (9) is provided on the outer side of the mounting seat (4).

5. The isolated solenoid valve according to claim 4, characterized in that: A first sealing ring (10) is provided on the contact surface between the protective sleeve (9) and the mounting seat (4).

6. The isolated solenoid valve according to claim 4, characterized in that: The protective sleeve (9) comprises an outer sleeve and a top plate, wherein the outer sleeve is sleeved on the outside of the mounting seat (4), and the top plate is fixed above the outer sleeve; A through slot for the deformation memory alloy (7) to extend out is provided above the outer sleeve.

7. The isolated solenoid valve according to claim 6, characterized in that: A step groove is provided on the top of the outer sleeve, and a sealing plate (11) is provided in the step groove; A second sealing ring (12) is provided on the contact surface between the sealing plate (11) and the step groove.

8. The isolated solenoid valve according to claim 1, characterized in that: A third sealing ring (13) is provided on the contact surface between the valve body (1) and the mounting seat (4).

9. The isolated solenoid valve according to claim 1, characterized in that: The piston seat (2) is connected to the corresponding mounting hole of the valve body (1) via threads.

10. The isolated solenoid valve according to claim 1, characterized in that: The mounting seat (4) is provided with a central sliding groove, and the valve core (5) is placed in the central sliding groove.

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