Isolation type electromagnetic valve

Abstract

The utility model discloses an isolation type electromagnetic valve which comprises a lower flow guide channel and an upper valve shell fixed to the top end of the lower flow guide channel, the two ends of the lower flow guide channel are provided with a drainage channel and a drainage channel respectively, a prefabricated cavity is formed in the upper valve shell, and a valve column is fixed to the interior of the prefabricated cavity. And the bottom end of the valve column extends into the lower flow guide channel, a middle cavity used for being communicated with the drainage channel is formed in the valve column, and an electromagnetic assembly is installed at the top of the prefabricated cavity. By adding multi-stage sealing, medium leakage can be effectively prevented, and particularly under the working conditions of high pressure, high temperature or corrosive media, the three-stage sealing structure can more reliably maintain the sealing performance of the valve, so that the safe operation of the valve body is ensured.

Description

Technical Field

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

[0002] The structure of the isolated solenoid valve includes a valve body, a valve core, an electromagnetic coil, a seal and a connector. The valve body is the outer shell, which contains a valve core and an electromagnetic coil. The valve core is a key component for controlling the flow of the medium, and is opened and closed by electromagnetic force. The electromagnetic coil provides an electromagnetic force source, generates a magnetic field to move the valve core, and the seal ensures the valve seal. The connector is used for pipeline connection. The working principle is to use electromagnetic force to control the movement of the valve core. The magnetic field is generated by energizing the electromagnetic coil to cause the valve core to move under force, changing the state of the fluid channel. When the power is off, the valve core returns to its original position to close the channel. The opening and closing of the valve core is controlled by controlling the energization state of the electromagnetic coil, thereby To regulate the flow of media, the main function of the isolation solenoid valve is to control the flow of liquid or gas. It is widely used in industrial automation control systems to achieve functions such as liquid or gas switch control, flow regulation, flow distribution, and direction control. However, the current solenoid valves use the valve core to isolate and block the diversion cavity during use, so that the medium is intercepted and cannot be conducted. During this process, the valve core and the diversion cavity are in surface contact, and there are fewer interception surfaces formed between the two. This design is easily eroded and worn by the medium, especially under high pressure, high temperature or corrosive media conditions, which can easily lead to leakage of the solenoid valve. Utility Model Content

[0003] The purpose of the utility model is to provide an isolation type solenoid valve, in which a three-stage sealing valve core structure is added. When the solenoid assembly no longer generates magnetic force, the three-stage sealing valve core structure is limited on the cavity of the solenoid valve by an elastic reset structure to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an isolation solenoid valve, comprising a lower flow guide channel and an upper valve shell fixed at the top of the lower flow guide channel, the two ends of the lower flow guide channel are respectively provided with a flow guide channel and a flow discharge channel, a prefabricated cavity is provided inside the upper valve shell, and a valve column is fixed inside the prefabricated cavity, the bottom end of the valve column extends to the interior of the lower flow guide channel, a central cavity for communicating with the flow discharge channel is provided inside the valve column, an electromagnetic component is installed on the top of the prefabricated cavity, a T-shaped valve sleeve is installed on the top of the valve column through an elastic reset structure, and a magnetic column for magnetic attraction with the electromagnetic component is installed at the center position of the T-shaped valve sleeve, and a three-stage sealing valve core structure for blocking the central cavity is provided below the magnetic column.

[0005] Preferably, inner thread columns are integrally formed on the outer walls on both sides of the lower flow guide channel, and the inner thread columns are used for bolts to pass through.

[0006] Preferably, a flow guide hole is provided on an outer wall of one side of the valve column, and the flow guide hole and the drainage channel are connected to each other.

[0007] Preferably, a drainage port is provided on the outer wall on the other side of the valve column, and the drainage port is used to connect the central cavity and the drainage channel.

[0008] Preferably, the elastic reset structure includes an annular sink cavity opened at the top of the valve column and extending downward, a coil spring is mounted inside the annular sink cavity, the top of the coil spring is fixedly connected to the bottom end of the T-shaped valve sleeve, and the bottom end of the coil spring is fixedly connected to the bottom wall of the annular sink cavity.

[0009] Preferably, the three-stage sealing valve core structure includes a central annular rib fixed at the center position inside the valve column, and an outer annular sealing sleeve fixed at the bottom end of the T-shaped valve sleeve, the outer wall of the central annular rib is provided with a hollow portion for medium to enter, and the bottom end of the magnetic column is fixed with a valve head for sealing the central cavity, the valve head includes a large head end and a small head end, the outer diameter of the large head end is equal to the inner diameter of the central annular rib, and the outer diameter of the small head end is equal to the inner diameter of the central cavity.

[0010] Preferably, the cross-sectional shape of the hollow portion is circular, and four hollow portions are provided, and the four hollow portions are symmetrically structured about the center point of the central annular rib.

[0011] Preferably, an annular lip is integrally formed on one end of the valve head surface, and the outer diameter of the annular lip is larger than the inner diameter of the central annular rib.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows: the isolation solenoid valve is provided with a three-stage sealing valve core structure and a valve column and other structures that cooperate with each other. When the electromagnetic component is powered off, the electromagnetic coil no longer generates a magnetic field. At this time, the elastic reset structure pushes the T-type valve sleeve to move in the closing direction, so that the central cavity is re-sealed. The elastic reset structure plays a limiting role, ensuring that the three-stage sealing valve core structure is limited on the central cavity of the solenoid valve, ensuring that the valve core can be accurately reset into place, and by adding multi-stage sealing, medium leakage can be effectively prevented. Especially under high pressure, high temperature or corrosive medium conditions, the three-stage sealing structure can more reliably maintain the sealing performance of the valve, thereby ensuring the safe operation of the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The three-dimensional structure of the utility model is shown in FIG. Figure 1 ;

[0014] Figure 2 The three-dimensional structure of the utility model is shown in FIG. Figure 2 ;

[0015] Figure 3It is a three-dimensional cross-sectional structural schematic diagram of the utility model;

[0016] Figure 4 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0017] Figure 5 This is a schematic diagram of the three-dimensional cross-sectional structure of the valve column of the utility model;

[0018] In the figure: 1. lower guide channel; 2. upper valve shell; 201. prefabricated cavity; 3. guide channel; 4. discharge channel; 5. valve column; 501. central cavity; 502. guide port; 503. guide hole; 6. electromagnetic assembly; 7. T-type valve sleeve; 8. elastic reset structure; 801. annular sink cavity; 802. spiral spring; 9. magnetic column; 10. three-stage sealing valve core structure; 1001. central annular rib; 1002. outer annular sealing sleeve; 1003. valve head; 1004. hollow part. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-5 The utility model provides an embodiment: an isolation type solenoid valve, comprising a lower flow guide channel 1 and an upper valve shell 2 fixed at the top of the lower flow guide channel 1, the two ends of the lower flow guide channel 1 are respectively provided with a flow guide channel 3 and a flow discharge channel 4, a prefabricated cavity 201 is provided inside the upper valve shell 2, and a valve column 5 is fixed inside the prefabricated cavity 201, the bottom end of the valve column 5 extends to the inside of the lower flow guide channel 1, and the inside of the valve column 5 is provided with a central cavity 501 for communicating with the flow discharge channel 4;

[0021] A flow guide hole 503 is provided on the outer wall of one side of the valve column 5, and the flow guide hole 503 and the drainage channel 3 are connected to each other. A flow guide port 502 is provided on the outer wall of the other side of the valve column 5, and the flow guide port 502 is used to connect the central cavity 501 and the drainage channel 4;

[0022] An electromagnetic assembly 6 is installed on the top of the prefabricated cavity 201, a T-shaped valve sleeve 7 is installed on the top of the valve column 5 through an elastic reset structure 8, and a magnetic column 9 for magnetic attraction with the electromagnetic assembly 6 is installed at the center position inside the T-shaped valve sleeve 7, and a three-stage sealing valve core structure 10 for blocking the central cavity 501 is arranged below the magnetic column 9. When the electromagnetic assembly 6 is energized, the electromagnetic coil generates a magnetic field, and the magnetic field acts on the magnetic column 9, so that the T-shaped valve sleeve 7, the magnetic column 9 and the three-stage sealing valve core structure 10 overcome the elastic force of the elastic reset structure 8 and move in the opening direction, thereby opening the valve and allowing the medium to be conducted;

[0023] Internal threaded columns are integrally formed on the outer walls of both sides of the lower flow guide channel 1, and the internal threaded columns are used for bolts to pass through, and the solenoid valve can be fixed and installed through the internal threaded columns;

[0024] The three-stage sealing valve core structure 10 includes a central annular rib 1001 fixed at the center position inside the valve column 5, and an outer annular sealing sleeve 1002 fixed at the bottom end of the T-shaped valve sleeve 7. A hollow portion 1004 for medium to enter is arranged on the outer wall of the central annular rib 1001. A valve head 1003 for blocking the central cavity 501 is fixed at the bottom end of the magnetic column 9. The valve head 1003 includes a large head end and a small head end. The outer diameter of the large head end is equal to the inner diameter of the central annular rib 1001, the outer diameter of the small head end is equal to the inner diameter of the central cavity 501, and the cross section of the hollow portion 1004 is equal to the inner diameter of the central cavity 501. The surface shape is circular, and there are four hollow parts 1004. The four hollow parts 1004 are symmetrically structured about the center point of the central annular rib 1001. When the electromagnetic component 6 generates magnetic force and magnetically attracts the magnetic column 9 and the T-type valve sleeve 7 to move upward, the T-type valve sleeve 7 drives the valve head 1003 and the outer annular sealing sleeve 1002 to move upward together. At this time, the outer annular sealing sleeve 1002 no longer covers the central annular rib 1001, and the valve head 1003 is no longer located in the central cavity 501, so the guide hole 503, the drainage channel 3 and the central cavity 501 are connected to each other for medium circulation;

[0025] An annular lip is integrally formed at one end of the surface of the valve head 1003, and the outer diameter of the annular lip is larger than the inner diameter of the central annular rib 1001. When the electromagnetic assembly 6 is powered off, the three-stage sealing valve core structure 10 is reset. At this time, the outer annular sealing sleeve 1002 surrounds the outer side of the central annular rib 1001, and a first sealing surface is formed between the two. A second sealing surface is formed between the outer wall of the valve head 1003 and the inner wall of the central annular rib 1001, and the valve head 1003 is located in the central cavity 501 to form a third sealing surface. A multi-stage sealing structure is used to improve the sealing performance of the valve and reduce the possibility of leakage.

[0026] The elastic reset structure 8 includes an annular sink cavity 801 which is opened at the top of the valve column 5 and extends downward. A coil spring 802 is mounted inside the annular sink cavity 801. The top of the coil spring 802 is fixedly connected to the bottom end of the T-type valve sleeve 7, and the bottom end of the coil spring 802 is fixedly connected to the bottom wall of the annular sink cavity 801. The coil spring 802 always pulls the T-type valve sleeve 7 and the magnetic column 9 downward, which can ensure that when the electromagnetic component 6 no longer generates magnetic force, the three-level sealing valve core structure 10 can be accurately reset to its position, ensuring the normal closure of the valve and avoiding the failure of the valve to close due to misoperation or external interference.

[0027] When the embodiment of the present application is in use, first, the external medium enters the lower flow guide channel 1 through the flow guide channel 3. In the initial state, the electromagnetic component 6 does not act on the magnetic column 9. At this time, the downward elastic force of the elastic reset structure 8 firmly makes the T-type valve sleeve 7 rest against the top of the valve column 5. At this time, three contact surfaces for blocking the flow guide channel 3 are formed between the three-level sealing valve core structure 10 and the valve column 5, that is, the electromagnetic valve is in a normally closed state, and the medium cannot enter the central cavity 501 and the drainage channel 4 through the valve column 5. When the medium in the lower flow guide channel 1 flows normally, the electromagnetic component 6 is energized, and the electromagnetic coil in the electromagnetic component 6 generates a magnetic field and magnetizes the iron core, so that the iron core generates a magnetic force, which is opposite to the magnetism of the magnetic column 9. At this time, the magnetic column 9 and the T-type valve sleeve 7 are magnetically attracted by the electromagnetic component 6, and the elastic reset structure 8 It is stretched and deformed until the three-stage sealing valve core structure 10 no longer blocks the central cavity 501 in the valve column 5. At this time, the drainage channel 3, the central cavity 501, and the discharge channel 4 constitute a cavity for the normal circulation of the medium. When the electromagnetic component 6 is powered off, the electromagnetic coil no longer generates a magnetic field. At this time, the elastic reset structure 8 pushes the T-type valve sleeve 7 to move in the closing direction, so that the central cavity 501 is re-blocked. The elastic reset structure 8 plays a limiting role, ensuring that the three-stage sealing valve core structure 10 is limited on the central cavity 501 of the solenoid valve, ensuring that the valve core can be accurately reset to its position, and by adding multi-stage sealing, medium leakage can be effectively prevented. Especially under high pressure, high temperature or corrosive medium conditions, the three-stage sealing structure can more reliably maintain the sealing performance of the valve, thereby ensuring the safe operation of the valve body.

Claims

1. An isolation solenoid valve, characterized in that: The invention comprises a lower flow guide channel (1) and an upper valve shell (2) fixed at the top of the lower flow guide channel (1), wherein the two ends of the lower flow guide channel (1) are respectively provided with a flow guide channel (3) and a flow discharge channel (4), wherein a prefabricated cavity (201) is provided inside the upper valve shell (2), and a valve column (5) is fixed inside the prefabricated cavity (201), wherein the bottom end of the valve column (5) extends into the interior of the lower flow guide channel (1), wherein a central cavity (501) for communicating with the flow discharge channel (4) is provided inside the valve column (5), wherein an electromagnetic component (6) is installed at the top of the prefabricated cavity (201), wherein a T-shaped valve sleeve (7) is installed at the top of the valve column (5) via an elastic reset structure (8), and wherein a magnetic column (9) for magnetically attracting the electromagnetic component (6) is installed at the center position inside the T-shaped valve sleeve (7), and a three-stage sealing valve core structure (10) for blocking the central cavity (501) is provided below the magnetic column (9).

2. An isolation solenoid valve according to claim 1, characterized in that: Internal threaded columns are integrally formed on the outer walls on both sides of the lower flow guide channel (1), and the internal threaded columns are used for bolts to pass through.

3. The isolation solenoid valve according to claim 1, characterized in that: A flow guide hole (503) is provided on an outer wall of one side of the valve column (5), and the flow guide hole (503) and the flow guide channel (3) are in communication with each other.

4. The isolation solenoid valve according to claim 1, characterized in that: A drainage port (502) is provided on the outer wall of the other side of the valve column (5), and the drainage port (502) is used to connect the central cavity (501) and the drainage channel (4).

5. The isolation solenoid valve according to claim 1, characterized in that: The elastic reset structure (8) comprises an annular sink cavity (801) which is opened at the top end of the valve column (5) and extends downward, and a coil spring (802) is sleeved inside the annular sink cavity (801), the top end of the coil spring (802) is fixedly connected to the bottom end of the T-shaped valve sleeve (7), and the bottom end of the coil spring (802) is fixedly connected to the bottom wall of the annular sink cavity (801).

6. The isolation solenoid valve according to claim 1, characterized in that: The three-stage sealing valve core structure (10) comprises a central annular rib (1001) fixed at the center position inside the valve column (5), and an outer annular sealing sleeve (1002) fixed at the bottom end of the T-shaped valve sleeve (7), the outer wall of the central annular rib (1001) is provided with a hollow portion (1004) for medium to enter, and the bottom end of the magnetic column (9) is fixed with a valve head (1003) for sealing the central cavity (501), and the valve head (1003) comprises a large head end and a small head end, the outer diameter of the large head end is equal to the inner diameter of the central annular rib (1001), and the outer diameter of the small head end is equal to the inner diameter of the central cavity (501).

7. The isolation solenoid valve according to claim 6, characterized in that: The cross-sectional shape of the hollow portion (1004) is circular, and four hollow portions (1004) are provided. The four hollow portions (1004) are symmetrically structured about the center point of the central annular rib (1001).

8. The isolation solenoid valve according to claim 6, characterized in that: An annular lip is integrally formed on one end of the surface of the valve head (1003), and the outer diameter of the annular lip is greater than the inner diameter of the central annular rib (1001).

Images