A sealing and non-return device for chemical fiber manufacturing

Abstract

The present invention relates to the technical field of sealing check devices, and discloses a sealing check device for chemical fiber manufacturing, comprising a check valve body, a movable cone block having a passage with the internal space of the check valve body connected to the bottom of a spring, the top surface of the movable cone block being able to fit with the inner wall of a fixed cover, a guide cavity being provided inside the movable cone block, a one-way valve being provided at the end of the guide cavity of the movable cone block, and a lower cavity being provided on the outer end surface of the movable cone block. When the outlet section of the check valve body of the sealing check device for chemical fiber manufacturing is blocked, the high-pressure area continuously supplies liquid to the inside of the check valve body, pushing the movable cone block upward, causing the upper cavity and the lower cavity to fit together to form a complete channel, and then the liquid slowly moves upward. When the liquid contacts the bottom surface of the elastic membrane and pushes the movable contact upward, the conductive circuit causes the annular magnetic block and the electromagnet of the same radius to be attracted, so that the channel between the upper cavity and the lower cavity is stabilized, and an alarm light is triggered to remind the staff to make corresponding replacements.

Description

Technical Field

[0001] The invention relates to the technical field of sealing and non-return technology, in particular to a sealing and non-return device for chemical fiber manufacturing. Background Art

[0002] In the field of chemical fibers, flash tanks are often used for some industrial processing. Flash tanks are a type of equipment used to provide space for rapid vaporization and vapor-liquid separation of fluids. After flash evaporation allows high-pressure saturated water to enter a lower-pressure container, the sudden drop in pressure causes these saturated water to become saturated water vapor and saturated water under the container pressure. The boiling point of a substance increases with increasing pressure and decreases with decreasing pressure. In this way, the high-pressure and high-temperature fluid can be reduced in pressure to lower its boiling point and enter the flash tank. At this time, the fluid temperature is higher than the boiling point under the pressure. The fluid rapidly boils and vaporizes in the flash tank, and the two phases are separated. In the industrial processing of the flash tank, a check valve is indispensable, and the backflow of the separated liquid is prevented by the check valve.

[0003] However, since the pressure at the outlet of the water pipe is lower than that at the inlet of the water pipe, the high-temperature liquid will vaporize into steam to form a water flow mixed with fiber debris, which can easily cause blockage and damage to the check valve. In the existing technology, multiple check valve groups are often used to distribute the pressure difference, but since it is impossible to determine which valve body is blocked, the entire valve group needs to be repaired, and the maintenance efficiency is low. Summary of the Invention

[0004] (1) Technical problems solved

[0005] In view of the deficiencies in the prior art, the present invention provides a sealing and non-return device for chemical fiber manufacturing, which has the advantages of being easy to maintain and solves the above-mentioned technical problems.

[0006] (2) Technical solution

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a sealing check device for chemical fiber manufacturing, comprising a check valve body, the inlet end of the check valve body being connected to the high-pressure zone, the discharge end of the check valve body being connected to the low-pressure zone, a cylindrical annular protrusion being provided at the middle end of the top surface of the check valve body, and a downward fixing cover being provided at the end of the annular wall, a plurality of springs being connected to the bottom surface of the fixing cover, a trigger device for triggering an early warning being connected to the middle end of the bottom surface of the fixing cover, an upper cavity being provided on the bottom surface of the fixing cover, an electromagnet being embedded and connected to the bottom edge of the fixing cover, the electromagnet being controlled to start by the trigger device, a movable cone block being connected to the inner space of the check valve body at the bottom of the spring, the top surface of the movable cone block being able to fit into the inner wall of the fixed cover, a guide cavity being provided inside the movable cone block, a one-way valve being provided at the end of the guide cavity of the movable cone block, and a lower cavity being provided on the outer end surface of the movable cone block.

[0008] As an optimal technical solution of the present invention, the fixed cover is fixedly installed on the top of the inner wall of the raised part of the check valve body and is sealed with the inner wall of the check valve body. The inner wall of the fixed cover is a truncated cone-shaped depression, and the upper cavity cross-section opened on the inner wall of the fixed cover is a semicircular groove.

[0009] As a preferred technical solution of the present invention, the end of the upper cavity opened on the inner wall of the fixed cover is at the edge of the vertical cavity, the groove wall of the upper cavity is smooth, and the surface of the frustum-shaped non-circular groove on the bottom surface of the fixed cover is provided with an anti-slip layer.

[0010] As a preferred technical solution of the present invention, the spring is fixedly installed on both sides of the top surface of the inner wall of the fixed cover. The spring is a compression spring. A movable cone block is fixedly installed at the end of the spring. The movable cone block is in the shape of a frustum-shaped depression corresponding to the inner wall of the fixed cover. The outer end surface of the movable cone block is sealed with the inner wall of the check valve body and can slide relative to each other.

[0011] As a preferred technical solution of the present invention, the lower cavity opened on the outer end surface of the movable cone block corresponds to the upper cavity in terms of taper, and the cross-section is also a semicircular groove. An anti-slip layer is provided on the non-circular groove of the outer end surface of the movable cone block, and the end of the lower cavity is at the edge of the top surface of the movable cone block.

[0012] As a preferred technical solution of the present invention, a circular hole that connects to the chamber inside the check valve body is opened at the edge of the bottom surface of the movable cone block, a conical guide cavity is opened on the inner wall of the movable cone block, the top entrance of the guide cavity is opened at the middle end of the top surface of the movable cone block, and a one-way valve with an outlet facing the inside of the check valve body is present at the end of the guide cavity.

[0013] As a preferred technical solution of the present invention, the anti-slip layer should ensure that the closed chambers formed when the lower cavity and the upper cavity are attached are in a non-connected state.

[0014] As a preferred technical solution of the present invention, the magnetic fields of the magnetic block and the electromagnet are in opposite directions, and the electromagnet and the magnetic block are both ring-shaped with the same radius.

[0015] As a preferred technical solution of the present invention, the trigger device includes a support ring, a fixed contact and a movable contact. The support ring is fixedly installed on the middle end of the top surface of the inner wall of the fixed cover, the fixed contact is fixedly installed on the middle end of the top surface of the inner wall of the fixed cover, and the movable contact is fixedly installed on the bottom surface of the support ring through an elastic membrane.

[0016] As a preferred technical solution of the present invention, the bottom surface of the support ring is lower than the bottom surface of the fixed contact, there is a gap between the movable contact and the fixed contact, and there is an electrical connection between the fixed contact and the electromagnet.

[0017] Compared with the prior art, the present invention provides a sealing and non-return device for chemical fiber manufacturing, which has the following beneficial effects:

[0018] 1. The present invention is that when the outlet section of the check valve body is blocked, the high-pressure area will continuously supply liquid to the inside of the check valve body. After that, when the inside is full, the movable cone block will be pushed upward, so that the upper cavity and the lower cavity are fitted together to form a complete channel. After that, the water enters the guide cavity from the channel and discharges the gas inside the guide cavity through the one-way valve, or is compressed at the one-way valve. At the same time, the water slowly moves upward. At the same time, when the water contacts the bottom surface of the elastic membrane and pushes the movable contact upward, the circuit will be turned on to allow the annular magnetic block and the electromagnet with the same radius to be adsorbed, so that the channel between the upper cavity and the lower cavity is stabilized, and the alarm light is triggered to remind the staff to make corresponding replacements.

[0019] 2. Under normal circumstances, the movable contact of the present invention presses the elastic membrane downward under the action of its own gravity, so that the elastic membrane is in a downward convex state. When the liquid flows out from between the upper cavity and the lower cavity, the splash may be insufficient to push the elastic membrane up smoothly, allowing it to conduct the circuit at the fixed contact, thereby avoiding the occurrence of false touch. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic three-dimensional diagram of the structure of the present invention;

[0021] Figure 2 It is a schematic sectional perspective view of the structure of the present invention;

[0022] Figure 3 This is a partial enlarged schematic diagram of structure A of the present invention;

[0023] Figure 4 It is a schematic cross-sectional view of the structure of the present invention;

[0024] Figure 5 This is a partial enlarged schematic diagram of structure B of the present invention;

[0025] Figure 6 This is a three-dimensional schematic diagram of the fixed cover of the structure of the present invention;

[0026] Figure 7 This is a three-dimensional schematic diagram of the movable cone block of the structure of the present invention;

[0027] Figure 8 Schematic diagram of the movable cone block of the structure of the present invention

[0028] Among them: 1. Check valve body; 2. Fixed cover; 3. Moving cone block; 4. Electromagnet; 5. Magnetic block; 6. Spring; 7. Diversion chamber; 8. Upper cavity; 9. Lower cavity; 10. One-way valve; 11. Support ring; 12. Fixed contact; 13. Movable contact. DETAILED DESCRIPTION

[0029] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0030] In the description of the present invention, unless otherwise specified, "plurality" means two or more; terms such as "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," and "tail" indicate positions or relationships based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, terms such as "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0032] See also Figure 1-8 A sealing check device for chemical fiber manufacturing includes a check valve body 1. The inlet end of the check valve body 1 is connected to the high-pressure area, and the outlet end of the check valve body 1 is connected to the low-pressure area. During normal operation, the liquid is guided from the high-pressure area of ​​the check valve body 1 to the low-pressure area. When the low-pressure area is saturated, it pushes the cover plate at the inlet end of the check valve body 1 to check the return. There is a cylindrical annular protrusion at the middle end of the top surface of the check valve body 1, and a downward fixed cover 2 is provided at the end of the ring wall. The top surface of the fixed cover 2 is connected to an alarm light, and the bottom surface of the fixed cover 2 is connected to multiple springs 6. The middle end of the bottom surface of the fixed cover 2 is connected to a trigger device for triggering an early warning. The bottom surface of the fixed cover 2 is provided with an upper cavity 8. The bottom edge of the fixed cover 2 is embedded with an electromagnet 4, which is activated by the trigger device. The bottom of the spring 6 is connected to a movable cone block 3 which has a passage with the internal space of the check valve body 1. The top surface of the movable cone block 3 can be fitted with the inner wall of the fixed cover 2. A guide cavity 7 is provided inside the movable cone block 3. A one-way valve 10 is provided at the end of the guide cavity 7 of the movable cone block 3. The outer end surface of the movable cone block 3 is provided with a lower cavity 9.

[0033] Furthermore, the fixed cover 2 is fixedly mounted on the top of the inner wall of the raised part of the check valve body 1 and is sealed with the inner wall of the check valve body 1, which can ensure that the liquid inside the check valve body 1 will not flow out from the edge of the fixed cover 2 to the outside, and thus the trigger device cannot be triggered. The inner wall of the fixed cover 2 is a truncated cone-shaped depression, so that its inner wall is in contact with the moving cone block 3, and the spring 6 is fixedly mounted on both sides of the top surface of the inner wall of the fixed cover 2. The spring 6 is a compression spring, and a moving cone block 3 is fixedly mounted on the end of the spring 6. The moving cone block 3 is a shape corresponding to the truncated cone-shaped depression on the inner wall of the fixed cover 2, so that the moving cone block 3 can be fitted with the non-grooved part of the fixed cover 2. At the same time, the cross-section of the upper cavity 8 opened on the inner wall of the fixed cover 2 is a semicircular groove, and the lower cavity 8 opened on the outer end face of the moving cone block 3 The cavity 9 corresponds to the upper cavity 8 in taper, and the cross-section is also a semicircular groove. When the movable cone block 3 is fitted with the fixed cover 2, the upper cavity 8 will fit with the lower cavity 9 to form a complete conical spiral groove with a circular cross-section. At the same time, an anti-slip layer is provided on the non-circular groove surface of the truncated cone-shaped recess on the bottom surface of the fixed cover 2 and the non-circular groove surface of the outer end surface of the movable cone block 3. The anti-slip layer should ensure that the closed chambers formed when the lower cavity 9 and the upper cavity 8 are fitted are in a non-connected state, thereby ensuring that the flow of liquid between the upper cavity 8 and the lower cavity 9 is unidirectional and will not leak from the gap. The end of the upper cavity 8 opened on the inner wall of the fixed cover 2 is at the edge of the vertical cavity, so that the liquid flows out from between the upper cavity 8 and the lower cavity 9 and is on the surface of the movable cone block 3.

[0034] Furthermore, a circular hole is provided at the edge of the bottom surface of the movable cone block 3 to conduct the chamber inside the check valve body 1, which can allow water to enter the area above the movable cone block 3 due to the pressure generated by the blockage inside the check valve body 1. At the same time, as the pressure increases, the water will push the movable cone block 3 upward, so that a closed area is formed between the upper cavity 8 and the lower cavity 9. After passing through the area, the water enters the conical guide cavity 7 on the inner wall of the movable cone block 3 from the top surface of the movable cone block 3. The top inlet of the guide cavity 7 is provided at the middle end of the top surface of the movable cone block 3, and flows downward and stays above the one-way valve 10 at the end of the guide cavity 7, where there is an outlet facing the inside of the check valve body 1, and gradually accumulates to make the liquid level rise. When the inside is not completely blocked, the liquid entering the one-way valve 10 will be discharged outward at the same time as the next feed. When complete blockage occurs, the one-way valve 10 will be in a closed state and cannot be opened.

[0035] Furthermore, the trigger device includes a support ring 11, a fixed contact 12 and a movable contact 13. The support ring 11 is fixedly installed on the middle end of the top surface of the inner wall of the fixed cover 2, the fixed contact 12 is fixedly installed on the middle end of the top surface of the inner wall of the fixed cover 2, and the movable contact 13 is fixedly installed on the bottom surface of the support ring 11 through an elastic membrane. The bottom surface of the support ring 11 is lower than the bottom surface of the fixed contact 12. There is a gap between the movable contact 13 and the fixed contact 12, and there is an electrical connection between the fixed contact 12 and the electromagnet 4. Under normal circumstances, the movable contact 13 presses the elastic membrane downward under the action of its own gravity, so that the elastic membrane is in a In the downward convex state, when the liquid flows out from between the upper cavity 8 and the lower cavity 9, splashing may be generated, which is not enough to push up the elastic membrane smoothly, allowing it to conduct the circuit at the fixed contact 12, thereby avoiding accidental touch. The elastic membrane wrapped around the support ring 11 can effectively prevent the water from entering the internal cavity of the support ring 11. When the water contacts the bottom surface of the elastic membrane and pushes the movable contact 13 upward, the circuit will be turned on to allow the annular magnetic block 5 and the electromagnet 4 with the same radius to be adsorbed, so that the channel between the upper cavity 8 and the lower cavity 9 is stable, and the alarm light is triggered at the same time to remind the staff to replace it.

[0036] During use, when the outlet section of the check valve body 1 is blocked, the high-pressure area will continuously supply liquid to the inside of the check valve body 1. After that, when the inside is full, it will push the moving cone block 3 upward, so that the upper cavity 8 and the lower cavity 9 are fitted together to form a complete channel. After that, the water enters the guide cavity 7 from the channel and discharges the gas inside the guide cavity 7 through the one-way valve 10, or is compressed at the one-way valve. At the same time, the water slowly moves upward. At the same time, when the water contacts the bottom surface of the elastic membrane and pushes the movable contact 13 upward, the circuit will be turned on to allow the annular magnetic block 5 and the electromagnet 4 with the same radius to be adsorbed, so that the channel between the upper cavity 8 and the lower cavity 9 is stable, and the alarm light is triggered to remind the staff to replace it.

[0037] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A sealing check device for chemical fiber manufacturing, comprising a check valve body (1), wherein the inlet end of the check valve body (1) is connected to a high-pressure area, and the outlet end of the check valve body (1) is connected to a low-pressure area, characterized in that: The middle end of the top surface of the check valve body (1) has a cylindrical annular protrusion, and a downward fixed cover (2) is provided at the end of the annular wall, the bottom surface of the fixed cover (2) is connected to a plurality of springs (6), the middle end of the bottom surface of the fixed cover (2) is connected to a trigger device for triggering an early warning, the bottom surface of the fixed cover (2) is provided with an upper cavity (8), the bottom edge of the fixed cover (2) is embedded with an electromagnet (4), the electromagnet (4) is controlled to start by the trigger device, the bottom of the spring (6) is connected to a moving cone block (3) having a passage with the internal space of the check valve body (1), the top surface of the moving cone block (3) can be fitted with the inner wall of the fixed cover (2), the inside of the moving cone block (3) is provided with a guide cavity (7), the end of the guide cavity (7) of the moving cone block (3) is provided with a one-way valve (10), and the outer end surface of the moving cone block (3) is provided with a lower cavity (9); The trigger device comprises a support ring (11), a fixed contact (12) and a movable contact (13); the support ring (11) is fixedly mounted on the middle end of the top surface of the inner wall of the fixed cover (2); the fixed contact (12) is fixedly mounted on the middle end of the top surface of the inner wall of the fixed cover (2); the movable contact (13) is fixedly mounted on the bottom surface of the support ring (11) via an elastic membrane; the bottom surface of the support ring (11) is lower than the bottom surface of the fixed contact (12); a gap exists between the movable contact (13) and the fixed contact (12); and an electrical connection exists between the fixed contact (12) and the electromagnet (4).

2. The sealing and non-returning device for chemical fiber production according to claim 1, characterized in that: The fixed cover (2) is fixedly mounted on the top of the inner wall of the raised portion of the check valve body (1) and is sealed with the inner wall of the check valve body (1). The inner wall of the fixed cover (2) is a truncated cone-shaped depression, and the cross-section of the upper cavity (8) opened on the inner wall of the fixed cover (2) is a semicircular groove.

3. The sealing and non-returning device for chemical fiber production according to claim 2, characterized in that: The end of the upper cavity (8) formed on the inner wall of the fixed cover (2) is located at the edge of the vertical cavity. The groove wall of the upper cavity (8) is smooth, and the surface of the non-circular groove of the truncated cone-shaped depression on the bottom surface of the fixed cover (2) is provided with an anti-slip layer.

4. The sealing and non-returning device for chemical fiber production according to claim 1, characterized in that: The spring (6) is fixedly mounted on both sides of the top surface of the inner wall of the fixed cover (2). The spring (6) is a compression spring. A movable cone block (3) is fixedly mounted on the end of the spring (6). The movable cone block (3) is in the shape of a truncated cone-shaped depression corresponding to the inner wall of the fixed cover (2). The outer end surface of the movable cone block (3) is sealed with the inner wall of the check valve body (1) and can slide relative to each other.

5. The sealing and non-returning device for chemical fiber production according to claim 4, characterized in that: The lower cavity (9) opened on the outer end surface of the movable cone block (3) corresponds to the upper cavity (8) in terms of taper, and the cross section is also a semicircular groove. An anti-slip layer is provided at the non-circular groove portion of the outer end surface of the movable cone block (3), and the end of the lower cavity (9) is located at the edge of the top surface of the movable cone block (3).

6. The sealing and non-returning device for chemical fiber production according to claim 5, characterized in that: A circular hole is provided at the bottom edge of the movable cone block (3) for conducting to the inside of the check valve body (1), a conical flow guide cavity (7) is provided on the inner wall of the movable cone block (3), the top entrance of the flow guide cavity (7) is provided at the middle end of the top surface of the movable cone block (3), and a one-way valve (10) is provided at the end of the flow guide cavity (7) with an outlet facing the inside of the check valve body (1).

7. A sealing and non-return device for chemical fiber production according to claim 3 or 5, characterized in that: The anti-slip layer should ensure that the closed chamber formed when the lower cavity (9) and the upper cavity (8) are attached is in a non-connected state.

8. The sealing and non-returning device for chemical fiber production according to claim 1, characterized in that: The magnetic fields of the magnetic block (5) and the electromagnet (4) are in opposite directions, and the electromagnet (4) and the magnetic block (5) are both ring-shaped with the same radius.

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