Two-position five-way solenoid valve

Abstract

The utility model discloses a two position five pass solenoid valve, including the valve body, the one end of valve body is butt -jointed with the one side of pilot head, the inner chamber of valve body is installed with the valve stem, the outer wall of valve stem is fixedly installed with a group of piston, every piston is sealed respectively and is covered with a sealing washer, the utility model discloses, when the outer wall of sealing washer and the butt -jointed end of corresponding inner chamber of valve body preliminary contact, sealing washer will contract to the inside of ring groove because of the extrusion that is received at this time. After sealing washer moves to the position, under the action of spring, will drive soft rubber cover reset, after soft rubber cover resets, will drive the reset of expansion piece, when expansion piece resets, will drive sealing washer reset. When the reset effect of sealing washer becomes poor after long -term use, the sealing effect of sealing washer and valve body butt -jointed end can be improved by the reset force of soft rubber cover and spring, so that the valve body has more long -term safe service life.

Description

Technical Field

[0001] This utility model belongs to the field of electromagnetic valve technology, specifically relating to a two-position five-way electromagnetic valve. Background Technology

[0002] The 2-position 5-way solenoid valve, as a core actuator in a pneumatic control system, relies on the precise lateral displacement of its internal valve stem for operation. The valve stem is fixedly connected to a dedicated sealing ring. When the valve stem moves axially left or right under the action of the drive mechanism, it synchronously drives the sealing ring to reciprocate within the valve body cavity. By switching the position of the sealing ring, the solenoid valve can precisely achieve the alternating opening and closing of preset channels, thereby controlling the flow direction of compressed air and meeting the requirements of the actuator's extension, reversal, and other operating conditions.

[0003] However, under long-term, high-frequency reciprocating friction and pressure cycles, the rubber material of the sealing ring will gradually exhibit fatigue characteristics. The prolonged close contact and friction between the sealing ring and the inner wall of the solenoid valve will prevent the contact surfaces from effectively forming a seal again. This will directly lead to air leakage and other malfunctions, ultimately causing the 2-position 5-way solenoid valve to be unable to accurately control airflow, thus affecting the safe service life of the valve body. Utility Model Content

[0004] The purpose of this invention is to provide a two-position five-way solenoid valve, aiming to solve the problem that the rubber material of the sealing ring gradually exhibits fatigue characteristics under long-term, high-frequency reciprocating friction and pressure cycles. Long-term close contact and friction between the sealing ring and the inner wall of the solenoid valve will prevent the contact surfaces from effectively forming a seal again. This directly leads to air leakage and other malfunctions, ultimately causing the two-position five-way solenoid valve to be unable to accurately control airflow, thus affecting the safe service life of the valve body.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a two-position five-way solenoid valve, comprising a valve body, one end of which is connected to one side of a pilot head, a valve stem installed in the inner cavity of the valve body, a set of pistons fixedly installed on the outer wall of the valve stem, a sealing ring being sealed and fitted on each piston, and a groove being formed on the inner wall of the sealing ring. A ring groove is formed on the outer wall of the center end of the piston. An expansion plate is installed at the center end of the ring groove. The outer wall of the expansion plate away from the opening end of the ring groove is sealed and fitted into the inside of the groove.

[0006] In order to enable the six annular grooves to be installed at equal intervals in the central mounting area of ​​the piston, as a two-position five-way solenoid valve of this utility model, preferably, six threaded holes are equally spaced on the inner wall of the annular grooves, and a connector is screwed into the interior of each threaded hole. The length of the connector is adapted to the depth of the threaded hole. One end of the connector is integrally connected to one side of the soft rubber sleeve, and the other side of the soft rubber sleeve is in contact with the inner wall of the expansion piece.

[0007] In order to ensure that the sealing ring maintains a sufficient maximum diameter so that the outer wall of the sealing ring can form a sealing connection structure with the inner wall of the corresponding part in the valve body cavity, as a two-position five-way solenoid valve of this utility model, preferably, a spring is installed inside the soft rubber sleeve, and the soft rubber sleeve forms an elastic telescopic component through the spring. The diameter of the soft rubber sleeve is smaller than the width of the annular groove opening, and the width of the expansion piece is adapted to the width of the annular groove opening.

[0008] Compared with the prior art, the beneficial effects of this utility model are: When the pilot head is energized and drives the valve stem to move within the valve body's inner cavity, the movement of the valve stem drives the piston to move the sealing ring. When the outer wall of the sealing ring initially contacts the corresponding mating end within the valve body's inner cavity, the sealing ring contracts inwards due to compression. After the sealing ring reaches its position, the spring causes the soft rubber sleeve to reset. The reset of the soft rubber sleeve then causes the expansion plate to reset, which in turn causes the sealing ring to reset. This reset of the soft rubber sleeve provides supplementary reset kinetic energy during the sealing ring's own reset. Therefore, when the sealing ring's reset effect deteriorates after prolonged use, the supplementary reset force from the soft rubber sleeve and spring improves the sealing effect between the sealing ring and the valve body's mating end, thereby enhancing the sealing time between the sealing ring and the valve body's internal mating end and extending the valve body's safe service life. Attached Figure Description

[0009] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the cross-sectional structure of the valve body provided in an embodiment of this application.

[0010] Figure 2 This is a side view of the valve body structure provided in an embodiment of this application.

[0011] Figure 3 This is a side view of the valve stem structure provided in an embodiment of this application.

[0012] Figure 4 This is a schematic diagram of a partial cross-sectional structure of the piston provided in an embodiment of this application.

[0013] Figure 5 Provided for the embodiments of this application Figure 4 Enlarged structural diagram at point A in the middle.

[0014] Figure 6 This is a schematic diagram of the piston central region structure provided in an embodiment of this application.

[0015] Figure 7 This is a schematic diagram of the sealing ring structure provided in an embodiment of this application.

[0016] In the diagram: 1. Valve body; 2. Pilot head; 3. Valve stem; 4. Piston; 41. Annular groove; 42. Threaded hole; 43. Connector; 44. Soft rubber sleeve; 45. Spring; 5. Sealing ring; 6. Slot; 7. Expansion plate. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figures 1-7 The present invention provides the following technical solution: a two-position five-way solenoid valve, including a valve body 1, one end of the valve body 1 is connected to one side of the pilot head 2, a valve stem 3 is installed in the inner cavity of the valve body 1, a set of pistons 4 are fixedly installed on the outer wall of the valve stem 3, and a sealing ring 5 is respectively sealed on each piston 4, and a groove 6 is opened on the inner wall of the sealing ring 5. pass Figure 1 As can be seen, two and three through holes are respectively opened on the upper and lower sides of valve body 1, connecting to the inner cavity of valve body 1. Valve body 1 has a G1 / 4 interface, and pilot head 2 is a 10mm wide two-position three-way pilot valve with its power reduced to 1.2W, which can be directly driven by PLC.

[0019] A ring groove 41 is formed on the outer wall of the center end of the piston 4. An expansion plate 7 is installed inside the center end of the ring groove 41. The outer wall of the expansion plate 7 away from the opening end of the ring groove 41 is sealed and fitted inside the slot 6.

[0020] Preferably, the inner wall of the annular groove 41 is provided with six threaded holes 42 at equal intervals, and a connector 43 is screwed into the interior of each threaded hole 42; The length of the connector 43 is adapted to the depth of the threaded hole 42. One end of the connector 43 is integrally connected to one side of the soft rubber sleeve 44, and the other side of the soft rubber sleeve 44 is in contact with the inner wall of the expansion piece 7.

[0021] In practical use, the soft rubber sleeve 44 is connected to the corresponding threaded hole 42 through the connector 43, so that the soft rubber sleeve 44 can be easily installed in the annular groove 41. The soft rubber sleeve 44 is made of nitrile rubber, and the connector 43 is made of stainless steel. In this way, the soft rubber sleeve 44 and the connector 43 can maintain a long service life and will not affect the normal use of the valve body 1.

[0022] Preferably, a spring 45 is installed inside the soft rubber sleeve 44, and the soft rubber sleeve 44 forms an elastic telescopic component through the spring 45; The diameter of the soft rubber sleeve 44 is smaller than the opening width of the annular groove 41, and the width of the expansion piece 7 is matched with the opening width of the annular groove 41.

[0023] In practical use, the spring 45 is made of stainless steel, and its maximum extension length is two-thirds of the depth of the annular groove 41. The maximum extension length of the soft rubber sleeve 44 is greater than the maximum extension length of the spring 45. In this way, during use, the spring 45 can lift the soft rubber sleeve 44 to its maximum height, thereby enabling the expansion piece 7 to effectively expand the sealing ring 5 outward.

[0024] The expansion piece 7 is made of beryllium copper, which allows it to maintain good elasticity. When the soft rubber sleeve 44 expands the expansion piece 7 outward, the expansion piece 7 deforms accordingly, thereby expanding the sealing ring 5.

[0025] When the pilot head 2 is energized and drives the valve stem 3 to move within the inner cavity of the valve body 1, the movement of the valve stem 3 will cause the sealing ring 5 to move via the piston 4. When the outer wall of the sealing ring 5 initially contacts the corresponding mating end within the inner cavity of the valve body 1, the sealing ring 5 will contract into the annular groove 41 due to the compression. After the sealing ring 5 moves into position, the soft rubber sleeve 44 will be reset under the action of the spring 45. After the soft rubber sleeve 44 is reset, it will cause the expansion plate 7 to be reset, and the reset of the expansion plate 7 will cause the sealing ring 5 to be reset.

[0026] In this way, the reset of the soft rubber sleeve 44 can provide supplementary reset kinetic energy when the sealing ring 5 resets itself. When the reset effect of the sealing ring 5 deteriorates due to long-term use, the reset force supplemented by the soft rubber sleeve 44 and the spring 45 can improve the sealing effect at the joint between the sealing ring 5 and the valve body 1, thereby giving the valve body 1 a longer safe service life.

[0027] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A two-position five-way solenoid valve, comprising a valve body (1), one end of which is connected to one side of a pilot head (2), a valve stem (3) installed in the inner cavity of the valve body (1), and a set of pistons (4) fixedly installed on the outer wall of the valve stem (3), characterized in that, Each piston (4) is fitted with a sealing ring (5), and a groove (6) is formed on the inner wall of the sealing ring (5). A ring groove (41) is formed on the outer wall of the center end of the piston (4). An expansion plate (7) is installed at the center end of the ring groove (41). The outer wall of the expansion plate (7) away from the opening end of the ring groove (41) is sealed and fitted into the inside of the slot (6).

2. A two-position five-way solenoid valve according to claim 1, characterized in that: The inner wall of the annular groove (41) is provided with six threaded holes (42) at equal intervals, and a connector (43) is screwed into the interior of each threaded hole (42).

3. A two-position five-way solenoid valve according to claim 2, characterized in that: The length of the connector (43) is adapted to the depth of the threaded hole (42). One end of the connector (43) is integrally connected to one side of the soft rubber sleeve (44), and the other side of the soft rubber sleeve (44) is in contact with the inner wall of the expansion piece (7).

4. A two-position five-way solenoid valve according to claim 3, characterized in that: A spring (45) is installed inside the soft rubber sleeve (44), and the soft rubber sleeve (44) forms an elastic telescopic component through the spring (45).

5. A two-position five-way solenoid valve according to claim 3, characterized in that: The diameter of the soft rubber sleeve (44) is smaller than the opening width of the annular groove (41), and the width of the expansion piece (7) is adapted to the opening width of the annular groove (41).

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