A main valve body for a solenoid valve

Abstract

This invention relates to the technical field of high-speed solenoid valves, and in particular to a main valve body for a solenoid valve. The main valve body provided by this invention includes: a body having a valve cavity and a valve stem assembly; the body has an air inlet and at least one air outlet communicating with the valve cavity; a partition plate for separating the air inlet and outlet is also provided within the valve cavity, and the partition plate has a through hole; the valve stem assembly is slidably installed within the valve cavity through the through hole, and the valve stem assembly has a sealing part. By moving the valve stem assembly, the sealing part can be made to cooperate with the partition plate on the side facing it, selectively closing or opening the through hole. When the sealing part abuts against the partition plate, dust on the two contact surfaces will not slide relative to each other, effectively avoiding wear at the two contact surfaces. When the sealing part separates from the partition plate, the airflow between the air inlet and outlet can clean the dust adhering to the two contact surfaces, effectively preventing dust accumulation.

Description

Technical Field

[0001] This invention relates to the technical field of high-speed solenoid valves, and in particular to a main valve body for a solenoid valve. Background Technology

[0002] High-speed solenoid valves are widely used in mineral processing and coal preparation equipment. However, in practice, there is no customized design for high-speed solenoid valves to suit the working environment of mineral processing equipment. As a result, high-speed solenoid valves have a high failure rate during use, mainly due to failure of the sealing position. Through the collection of observations, it was found that dust in the working environment can reach the sealing position of the solenoid valve through the pipeline. The dynamic seal of the high-speed solenoid valve is prone to dust accumulation. After a period of operation, the seal often fails, causing the solenoid valve to malfunction and affecting the sorting performance of the equipment. Summary of the Invention

[0003] The purpose of this invention is to provide a main valve body for a solenoid valve to solve the technical problem of seal failure caused by wear at the sealing position.

[0004] The present invention provides a main valve body for a solenoid valve, comprising: a body having a valve cavity and a valve stem assembly;

[0005] The main body is provided with an air inlet and at least one air outlet communicating with the valve cavity. The valve cavity is also provided with a partition plate for separating the air inlet and the air outlet, and the partition plate is provided with a through hole.

[0006] The valve stem assembly is slidably installed in the valve cavity through the through hole. The valve stem assembly is provided with a sealing part. By moving the valve stem assembly, the sealing part can be made to cooperate with the partition plate on the side facing the partition plate, so as to selectively close or open the through hole.

[0007] As a further technical solution, it also includes a first sealing element, which is installed on the side of the sealing part facing the partition plate via a mounting ring groove.

[0008] As a further technical solution, the first sealing element includes a connecting part and a protruding part. The connecting part is fixed in the mounting ring groove by a vulcanization process, and the protruding part extends out of the groove of the mounting ring groove and is used to seal the sealing part and the partition plate.

[0009] As a further technical solution, the outer wall of the mounting ring groove is made of metal, and the projection of the inner wall on the partition plate is located inside the through hole.

[0010] As a further technical solution, the valve stem assembly has a first end and a second end opposite to each other. A first pilot gas working chamber for driving the body assembly to slide in a first direction is formed between the first end and the body. A second pilot gas working chamber for driving the body assembly to slide in a second direction is formed between the second end and the body. The first direction is opposite to the second direction.

[0011] As a further technical solution, the first end is provided with a second sealing element for cooperating with the body, and the second end is provided with a third sealing element for cooperating with the body.

[0012] As a further technical solution, a purge air passage is provided on the end face of the first end, and the inlet of the purge air passage is connected to the first pilot air working chamber, and the outlet is located at the second seal. When the pilot air in the first pilot air working chamber pushes the valve stem assembly to slide, the pilot air will enter the air outlet along the purge air passage through the outer periphery of the second seal.

[0013] As a further technical solution, the purging air passage includes an axial hole and at least one radial hole that are interconnected, and the two ends of the radial hole have the second seal at the contact position with the body.

[0014] As a further technical solution, the valve stem assembly includes a first rod body and a second rod body, and the first rod body is detachably connected to the second rod body.

[0015] As a further technical solution, the main body has two air outlets, the air inlet is located between the two air outlets, and the valve stem assembly slides in the valve cavity so that the air inlet is connected to one of the air outlets.

[0016] Compared with the prior art, the technical advantages of the main valve body for a solenoid valve provided by the present invention are as follows:

[0017] The main valve body for a solenoid valve provided by the present invention includes: a body having a valve cavity and a valve stem assembly; the body has an air inlet and at least one air outlet communicating with the valve cavity, and the valve cavity is further provided with a partition plate for separating the air inlet and the air outlet, the partition plate having a through hole; the valve stem assembly is slidably installed in the valve cavity through the through hole, and the valve stem assembly is provided with a sealing part, which can be moved to make the sealing part cooperate with the partition plate on the side facing the partition plate to selectively close or open the through hole.

[0018] During the sliding process of the valve stem assembly within the valve cavity, the sealing part opens the through hole by separating from the partition plate and closes the through hole by abutting against the partition plate, ensuring stable and convenient airflow between the air inlet and outlet. When the sealing part abuts against the partition plate, dust on the two contact surfaces will not slide relative to each other, effectively preventing wear at the two contact surfaces, thus ensuring the reliability and stability of the closed through hole, and consequently ensuring the working stability of the solenoid valve. When the sealing part separates from the partition plate, the airflow between the air inlet and outlet can clean the dust adhering to the two contact surfaces, effectively preventing dust accumulation and further ensuring the reliability and stability of the closed through hole.

[0019] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 A cross-sectional view of the main valve body provided in this embodiment of the invention, with an air inlet and an air outlet.

[0022] Figure 2 A cross-sectional view of the main valve body provided in this embodiment of the invention, with one air inlet and two air outlets.

[0023] Icons: 1-Main body; 2-Air outlet; 3-Air inlet; 4-Divider plate; 5-Through hole; 6-Sealing part; 7-Connecting part; 8-Protrusion; 9-Outer groove wall; 10-Inner groove wall; 11-First pilot gas working chamber; 12-Second pilot gas working chamber; 13-Second seal; 14-Third seal; 15-Purge air passage; 16-First rod; 17-Second rod; 18-End cap; 19-Anti-collision pad; 20-Pilot gas inlet. Detailed Implementation

[0024] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0027] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0028] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0029] The specific structure is as follows: Figures 1 to 2 As shown.

[0030] This embodiment provides a main valve body for a solenoid valve, including: a body 1 having a valve cavity and a valve stem assembly; the body 1 has an air inlet 3 communicating with the valve cavity and at least one air outlet 2, and the valve cavity is also provided with a partition plate 4 for separating the air inlet 3 and the air outlet 2, and the partition plate 4 has a through hole 5; the valve stem assembly is slidably installed in the valve cavity through the through hole 5, and the valve stem assembly is provided with a sealing part 6, which can be moved so that the sealing part 6 can cooperate with the partition plate 4 on the side facing the partition plate 4 to selectively close or open the through hole 5.

[0031] In this embodiment, the air outlet 2 is described in detail first. Since the valve stem assembly is provided with a blocking part 6, the valve stem assembly slides in the valve cavity, allowing the blocking part 6 to move towards and away from the partition plate 4. When the blocking part 6 moves towards the partition plate 4 and abuts against the partition plate 4, the blocking part 6 can block the through hole 5, thereby closing the through hole 5 and disconnecting the air inlet holes 3 on both sides of the partition plate 4 from the air outlet 2, thus forming an end face seal. When the blocking part 6 moves away from the partition plate 4, the blocking part 6 can separate from the partition plate 4, opening the through hole 5 and connecting the air inlet holes 3 on both sides of the partition plate 4 with the air outlet 2, thus forming an airflow.

[0032] In this embodiment, during the sliding process of the valve stem assembly within the valve cavity, the sealing part 6 opens the through hole 5 by separating from the partition plate 4, and closes the through hole 5 by abutting against the partition plate 4. This ensures stable and convenient airflow between the air inlet 3 and the air outlet 2. When the sealing part 6 abuts against the partition plate 4, the dust on the two contact surfaces will not slide relative to each other, effectively preventing wear at the two contact surfaces, thus ensuring the reliability and stability of the closed through hole 5, and consequently ensuring the working stability of the solenoid valve. When the sealing part 6 separates from the partition plate 4, the airflow between the air inlet 3 and the air outlet 2 can clean the dust adhering to the two contact surfaces, effectively preventing dust accumulation, further ensuring the reliability and stability of the closed through hole 5.

[0033] In the optional technical solution of this embodiment, a first sealing element is also included. The first sealing element is installed on the side of the sealing part 6 facing the partition plate 4 through the mounting ring groove.

[0034] In this embodiment, the first sealing element is a sealing ring. A mounting ring groove is formed on the end face of the sealing part 6 facing the partition plate 4. The first sealing element is fixedly installed in the mounting ring groove. It can be fixed by adhesive, by a snap-fit ​​structure, or by integral molding, whichever meets the requirements. The first sealing element seals the sealing part 6 and the partition plate 4, that is, it seals the opposite end faces of the sealing part 6 and the partition plate 4, i.e., the two abutting surfaces. This effectively ensures the sealing performance when the through hole 5 is closed, improving the reliability of the disconnection between the air inlet 3 and the air outlet 2. Preferably, the first sealing element is a sealing ring that can surround the outside of the through hole 5 to ensure the reliability of the seal.

[0035] In the optional technical solution of this embodiment, the first sealing element includes a connecting part 7 and a protruding part 8. The connecting part 7 is fixed in the mounting ring groove by a vulcanization process, and the protruding part 8 extends out of the groove of the mounting ring groove and is used to seal the sealing part 6 and the partition plate 4.

[0036] Specifically, the connecting part 7 is fixed in the mounting ring groove through a vulcanization process, ensuring the connection stability between the connecting part 7 and the mounting ring groove, preventing breakage during operation and affecting the sealing effect. This makes the connecting part 7 and the mounting ring groove an integral unit, i.e., the connecting part 7 and the sealing part 6 are integrated, resulting in high stability. A protrusion 8 is provided on the side of the connecting part 7 facing the partition plate 4, and the protrusion 8 extends out of the groove of the mounting ring groove. The first sealing element seals the sealing part 6 and the partition plate 4 through the protrusion 8. The sealing form of the protrusion 8 is an end-face seal. When dust adhering to the sealing surface affects the sealing position, it will not slide relative to the sealing position, making it less likely to cause wear at the sealing position, thus extending the life of the first sealing element and improving reliability.

[0037] Preferably, the connecting part 7 and the protrusion 8 are integrally formed, resulting in high structural stability and preventing breakage between them. Furthermore, the first sealing element is made of rubber or silicone, and the sealing part 6 and the partition plate 4 achieve a seal by compressing the protrusion 8, causing it to deform. This design is simple and provides good sealing performance. However, it is not limited to this; other elastic materials capable of achieving a seal can also be used.

[0038] It should be noted that the shape of the protrusion 8 can be an arc, a triangle, or a trapezoid, as long as it meets the requirements.

[0039] In the optional technical solution of this embodiment, the outer groove wall 9 of the mounting annular groove is made of metal, and the projection of the inner groove wall 10 on the partition plate 4 is located within the through hole 5. When a crack appears between the protrusion 8 and the connecting part 7, or when the protrusion 8 falls off, the end face of the outer groove wall 9 facing the partition plate 4 can abut against the partition plate 4 to form a metal seal, preventing leakage between the air inlet 3 and the air outlet 2. However, this does not affect the sorting index for large blocks, thus improving reliability. At the same time, since the projection of the inner groove wall 10 on the partition plate 4 is located within the through hole 5, when the end face of the outer groove wall 9 facing the partition plate 4 experiences a certain amount of wear, and when the end face of the outer groove wall 9 facing the partition plate 4 and the first sealing element abut against the partition plate 4, the inner groove wall 10 can extend into the through hole 5 to a certain extent, ensuring the original sealing effect. This arrangement also makes the structure compact and reduces the space occupied.

[0040] In this preferred embodiment, the thickness of the outer groove wall 9 is between 0.3 and 1 mm, which satisfies the sealing requirements while reducing the space occupied.

[0041] In the optional technical solution of this embodiment, the valve stem assembly has a first end and a second end opposite to each other. A first pilot gas working chamber 11 for driving the body 1 assembly to slide in a first direction is formed between the first end and the body 1. A second pilot gas working chamber 12 for driving the body 1 assembly to slide in a second direction is formed between the second end and the body 1. The first direction is opposite to the second direction.

[0042] In this embodiment, the valve stem assembly is installed inside the valve cavity. The movement of the valve stem assembly controls whether the air inlet 3 and the air outlet 2 are connected. The first end and the second end of the valve stem assembly form a first pilot gas working chamber 11 and a second pilot gas working chamber 12 between themselves and the inner wall of the main body 1. A pilot gas inlet 20 is opened at the top of the main body 1. The pilot gas inlet 20 is connected to the first pilot gas working chamber 11 and the second pilot gas working chamber 12 through pipelines. Pilot gas is delivered to the first pilot gas working chamber 11 and the second pilot gas working chamber 12 through the pilot gas inlet 20. When pilot gas is introduced into the first pilot gas working chamber 11, the pilot gas pushes the first end of the valve stem assembly, causing the entire valve stem assembly to move to the left, thereby opening the through hole 5 and connecting the air outlet 2 and the air inlet 3. When pilot gas is introduced into the second pilot gas working chamber 12, the pilot gas pushes the second end of the valve stem assembly, causing the entire valve stem assembly to move to the right. The end face of the sealing part 6 facing the partition plate 4 abuts against the partition plate 4, thereby closing the through hole 5 and disconnecting the air outlet 2 and the air inlet 3.

[0043] In the optional technical solution of this embodiment, a second sealing member 13 for cooperating with the body 1 is provided at the first end, and a third sealing member 14 for cooperating with the body 1 is provided at the second end.

[0044] Specifically, a second seal 13 is installed on the outer surface of the first end, and a third seal 14 is installed on the outer surface of the second end. Both the second seal 13 and the third seal 14 are sealing rings, and the sealing form is a dynamic seal of shaft hole sealing. The structure is simple and the sealing effect is good.

[0045] In the optional technical solution of this embodiment, a purge air passage 15 is provided on the end face of the first end, and the inlet of the purge air passage 15 is connected to the first pilot air working chamber 11, and the outlet is located at the second seal 13. When the pilot air in the first pilot air working chamber 11 pushes the valve stem assembly to slide, the pilot air will enter the air outlet 2 along the purge air passage 15 through the outer periphery of the second seal 13.

[0046] Specifically, the air outlet 2 is located to the right of the air inlet 3, and a purge air passage 15 is provided at the end of the first end of the valve stem assembly. The purge air passage 15 is closer to the air outlet 2 than the air inlet 3. By supplying pilot air to the first pilot air working chamber 11, the pilot air pushes the valve stem assembly to the left. During the movement, the pilot air can flow along the purge air passage 15 and blow towards the second seal 13. Since the pressure in the first pilot air working chamber 11 is higher than the pressure in the air outlet 2 and the air inlet 3, the second seal 13 leaks slightly. The pilot air in the first pilot air working chamber 11 flows along the purge air passage 15 to the air outlet 2, blowing away the powder and dust on the second seal 13, protecting the sealing position of the second seal 13, improving the service life of the second seal 13, and alleviating the technical problem in the prior art where the dynamic seal of the solenoid valve is prone to dust accumulation, leading to seal failure.

[0047] In the optional technical solution of this embodiment, the purging air passage 15 includes an axial hole and at least one radial hole that are interconnected, and the two ends of the radial hole have a second seal 13 at the contact position with the body 1 respectively.

[0048] Specifically, an axial hole is formed at the end axis position of the first end of the valve stem assembly, and a radial hole is formed at the radial position toward the second seal 13. The axial hole and the radial hole are interconnected to form a purge air passage 15.

[0049] When pilot gas is introduced into the first pilot gas working chamber 11, part of the pilot gas in the first pilot gas working chamber 11 acts on the end face of the first end of the valve stem assembly, pushing the valve stem assembly to move to the left, and the other part of the pilot gas enters the axial hole. The pilot gas in the axial hole flows out along the radial hole, and since the outlet of the radial hole faces the second seal 13, the pilot gas can blow away the dust at the second seal 13.

[0050] In the optional technical solution of this embodiment, the valve stem assembly includes a first rod body 16 and a second rod body 17, and the first rod body 16 is detachably connected to the rod body.

[0051] Specifically, the first rod 16 is located to the right of the second rod 17, and the first rod 16 and the second rod 17 are detachably connected by a connecting structure. Alternatively, the second rod 17 can be located on the side of the partition plate 4 near the air inlet 3, and a sealing part 6 is provided on the second rod 17. The end of the first rod 16 facing the second rod 17 passes through the through hole 5 and connects to the second rod 17. Alternatively, the first rod 16 can be located on the side of the through hole 5 near the air outlet 2, and a sealing part 6 is provided on the first rod 16. The end of the second rod 17 facing the first rod 16 passes through the through hole 5 and connects to the first rod 16. The connecting structure can be a snap-fit ​​structure or a threaded structure.

[0052] In this preferred embodiment, the outer wall of the end of the first rod 16 facing the second rod 17 is provided with external threads, and the end face of the second rod 17 facing the first rod 16 is provided with a threaded hole. The second rod 17 is located on the side of the through hole 5 near the air inlet 3. The end of the second rod 17 facing the first rod 16 is provided with a sealing part 6, that is, the sealing part 6 is located inside the air inlet 3. When the sealing part 6 abuts against the partition plate 4, it can seal the through hole 5 and prevent dust in the air inlet 3 from entering between the sealing part 6 and the partition plate 4, thereby preventing dust accumulation. The end of the first rod 16 facing the second rod 17 passes through the through hole 5 and extends into the threaded hole of the second rod 17. The external thread and the threaded hole cooperate to fix the first rod 16 and the second rod 17. Since the installation direction of the first rod 16 and the second rod 17 is limited, relatively less dust falls into the third seal 14, and the impact on the life of the third seal 14 is small. The first rod 16 and the second rod 17 are set separately, which makes the control of dimensional tolerance more stable. At the same time, the use of threaded fastening and threaded hole positioning methods ensures the assembly dimensions.

[0053] In this embodiment, end caps 18 are provided at both ends of the main body 1, and anti-collision pads 19 are provided on the inner sidewalls of the end caps 18. The anti-collision pads 19 are elastic, and the provision of the anti-collision pads 19 effectively prevents the first rod 16 and the second rod 17 from directly colliding with the end caps 18.

[0054] In the optional technical solution of this embodiment, two air outlets 2 are provided on the main body 1, and an air inlet 3 is located between the two air outlets 2. The valve stem assembly slides in the valve cavity so that the air inlet 3 is connected to one of the air outlets 2.

[0055] In this embodiment, a partition plate 4 is provided between the air inlet 3 and each of the two air outlets 2. The sealing part 6 is located between the two partition plates 4. By moving the valve stem assembly, the sealing part 6 can move towards one of the two partition plates 4 until it abuts against it, thereby closing the through hole 5 on this partition plate 4. At this time, the through hole 5 on the other partition plate 4 is opened. Through the reciprocating left and right movement of the valve stem assembly, the left and right end faces of the sealing part 6 respectively cooperate with the left and right partition plates 4, so that the air inlet 3 communicates with one of the air outlets 2 through the through hole 5 on one of the partition plates 4. The cooperation between the left and right end faces of the sealing part 6 and the two partition plates 4 respectively forms an end face seal, which also has the sealing effect of the above embodiment, and will not be repeated here. At the same time, this arrangement forms a two-position three-way valve, improving its applicability.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A main valve body for a solenoid valve, characterized in that, include: A body (1) having a valve cavity and a valve stem assembly; The main body (1) is provided with an air inlet (3) and at least one air outlet (2) communicating with the valve cavity. The valve cavity is also provided with a partition plate (4) for separating the air inlet (3) and the air outlet (2). The partition plate (4) is provided with a through hole (5). The valve stem assembly is slidably installed in the valve cavity through the through hole (5). The valve stem assembly is provided with a sealing part (6). By moving the valve stem assembly, the sealing part (6) can cooperate with the partition plate (4) on the side facing the partition plate (4) to selectively close or open the through hole (5). The valve stem assembly has a first end and a second end opposite to each other. A first pilot gas working chamber (11) for driving the valve stem assembly to slide in a first direction is formed between the first end and the body (1). A second pilot gas working chamber (12) for driving the valve stem assembly to slide in a second direction is formed between the second end and the body (1). The first direction is opposite to the second direction. The first end is provided with a second sealing element (13) for engaging with the body (1); The end face of the first end is provided with a purge air passage (15), and the inlet of the purge air passage (15) is connected to the first pilot air working chamber (11), and the outlet is located at the second seal (13). When the pilot air in the first pilot air working chamber (11) pushes the valve stem assembly to slide, the pilot air will enter the air outlet (2) along the purge air passage (15) through the outer periphery of the second seal (13).

2. The main valve body for a solenoid valve according to claim 1, characterized in that, It also includes a first seal, which is installed on the side of the sealing part (6) facing the partition plate (4) via a mounting ring groove.

3. The main valve body for a solenoid valve according to claim 2, characterized in that, The first sealing element includes a connecting part (7) and a protruding part (8). The connecting part (7) is fixed in the mounting ring groove by a vulcanization process. The protruding part (8) extends out of the groove of the mounting ring groove and is used to seal the sealing part (6) and the partition plate (4).

4. The main valve body for a solenoid valve according to claim 3, characterized in that, The outer wall (9) of the mounting ring groove is made of metal, and the projection of the inner wall (10) on the partition plate (4) is located inside the through hole (5).

5. The main valve body for a solenoid valve according to claim 1, characterized in that, The second end is provided with a third sealing element (14) that cooperates with the body (1).

6. The main valve body for a solenoid valve according to claim 1, characterized in that, The purging air passage (15) includes an axial hole and at least one radial hole that are interconnected. The two ends of the radial hole have the second seal (13) at the contact positions with the body (1).

7. The main valve body for a solenoid valve according to any one of claims 1-6, characterized in that, The valve stem assembly includes a first stem (16) and a second stem (17), and the first stem (16) and the second stem (17) are detachably connected.

8. The main valve body for a solenoid valve according to any one of claims 1-6, characterized in that, The main body (1) has two air outlets (2), and the air inlet (3) is located between the two air outlets (2). The valve stem assembly slides in the valve cavity so that the air inlet (3) is connected to one of the air outlets (2).

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