Micro-pressure exhaust one-way valve for dehumidification of main cable

Abstract

According to the micro-pressure exhaust one-way valve for dehumidification of the main cable, when the pressure in a ventilation system exceeds the micro-pressure difference, the pressure generated by the micro-pressure difference can push a sealing valve block of a valve element to overcome the elastic force of a spring to slide upwards, meanwhile, a sliding column of the valve element slides in a linear bearing, and when the sealing valve block moves and slides out of a sliding sealing cavity, the sealing valve block is closed. The ventilation system can exhaust and relieve pressure through the air inlet channel and the air exhaust channel, so that the pressure is reduced to a normal pressure range, and at the moment, the sealing valve body of the valve element slides into the sliding sealing cavity under the action of restoring force of the spring to close the one-way valve. According to the exhaust one-way valve, the moving resistance of the valve element is reduced through the linear bearing, and the spring provides restoring force for resetting of the valve element, so that a ventilation system can open the exhaust one-way valve to exhaust and relieve pressure under the condition of micro pressure difference, and the exhaust efficiency is improved; the exhaust one-way valve is mainly composed of the valve body, the linear bearing, the spring, the valve element and the air inlet and exhaust assembly, the structure is simple, use and maintenance are convenient, and the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of one-way valves, in particular to a main cable dehumidification micro-pressure exhaust one-way valve. BACKGROUND

[0002] One-way valves are generally used to ensure that gas can only flow in one direction. In a main cable dehumidification and drying ventilation system, in order to ensure the safety and performance of the ventilation system, an exhaust one-way valve needs to be provided in the ventilation system. When the pressure in the ventilation system exceeds a preset value, the exhaust one-way valve will be pushed open by the high gas pressure to release excess pressure and prevent system overpressure. However, some existing gas one-way valves generally need a high pressure to open and flow, and since the pressure provided in most ventilation systems is relatively high, the high pressure required by the existing exhaust one-way valve can be met. However, the gas one-way valves on the market often cannot meet the demand for micro-pressure exhaust, which leads to the inconvenience of using the gas one-way valves on the market for some ventilation systems that require micro-pressure exhaust. In addition, the existing exhaust one-way valve structure is relatively complex and has a high production cost. CONTENT OF THE UTILITY MODEL

[0003] In view of the deficiencies in the prior art, the present application aims to provide a main cable dehumidification micro-pressure exhaust one-way valve to solve the problems raised in the background art.

[0004] According to one aspect of the present application, a main cable dehumidification micro-pressure exhaust one-way valve includes a valve body, a linear bearing, a spring, a valve core, and an air inlet and exhaust assembly. The bottom of the valve body is recessed inward to form a mounting groove. The mounting groove is embedded with a linear bearing at the bottom. The air inlet and exhaust assembly is fixedly installed in the mounting groove. The air inlet and exhaust assembly is provided with an air inlet channel and an exhaust channel, which are connected. The upper end of the valve core is slidably connected to the linear bearing. The lower end of the valve core is slidably arranged in the air inlet and exhaust assembly. When the lower end of the valve core slides to the air inlet channel, the lower end of the valve core is in sealed connection with the air inlet and exhaust assembly, and the air inlet channel and the exhaust channel are not connected. The spring is sleeved on the valve core and arranged between the linear bearing and the valve core. When the valve core slides upward against the spring force, the lower end of the valve core is separated from the air inlet channel and slides to the position of the exhaust channel. The air inlet channel and the exhaust channel are connected. The air inlet and exhaust assembly is also fixedly installed on a gas pipeline. The inside of the gas pipeline is connected to the air inlet channel.

[0005] Preferably, the air inlet and exhaust assembly comprises a support block, a connecting block and a sliding groove, the shape and size of the outer side wall of the support block is matched with the shape and size of the inner side wall of the mounting groove, the support block is fixedly installed in the mounting groove, a sliding groove is recessed at the center of the top of the support block, the shape and size of the inner side wall of the sliding groove is matched with the shape and size of the outer side wall of the lower end of the valve core, the lower end of the valve core is slidingly arranged in the sliding groove, a plurality of grooves are equidistantly formed on the circumference of the support block, the upper end of each groove is communicated with the sliding groove and the lower end is communicated with the bottom surface of the support block to form the exhaust passage, the connecting block is integrally formed at the bottom of the support block, a through hole is formed in the middle of the connecting block, the through hole is communicated with the sliding groove and the bottom surface of the connecting block to form the air inlet passage, the connecting block is fixedly installed on the gas pipeline, the air inlet passage is communicated with the inside of the gas pipeline, the air inlet passage is communicated with the exhaust passage through the sliding groove, the height of the communicated position of the exhaust passage and the sliding groove is higher than the height of the groove bottom of the sliding groove, and the height difference between them forms a sliding sealing cavity, when the lower end of the valve core is located in the sliding sealing cavity, the outer side wall of the lower end of the valve core and the inner side wall of the sliding groove are in sliding sealing connection, and the air inlet passage and the exhaust passage are not communicated with each other, when the lower end of the valve core slides above the sliding sealing cavity, the air inlet passage and the exhaust passage are communicated with each other.

[0006] Preferably, the valve core comprises a sealing valve block and a sliding column, the sliding column is slidingly arranged in the linear bearing, the lower end of the sliding column is fixedly connected with the upper end of the sealing valve block, the sliding column is sleeved with the spring, the spring is arranged between the linear bearing and the sealing valve block, the shape and size of the outer side wall of the sealing valve block is matched with the shape and size of the inner side wall of the sliding groove, and the sealing valve block is slidingly arranged in the sliding groove, when the sealing valve block slides into the sliding sealing cavity, the outer side wall of the sealing valve block and the inner side wall of the sliding groove are in sliding sealing connection.

[0007] Preferably, the outer side wall of the sealing valve block is in cylindrical structure.

[0008] Preferably, the support block and the connecting block are in cylindrical structure.

[0009] Preferably, the outer diameter of the connecting block is smaller than the outer diameter of the support block.

[0010] Preferably, the support block is fixedly installed in the mounting groove of the valve body by screws.

[0011] Compared with the prior art, the micro-pressure exhaust one-way valve for main cable dehumidification has the following advantages: when the pressure in the ventilation system exceeds the normal pressure value and the pressure difference between the two is a micro-pressure difference, the pressure generated by the micro-pressure difference can push the sealing valve block of the valve core to slide upward to overcome the elastic force of the spring, and the sliding column of the valve core slides in the linear bearing to reduce the resistance when the valve core moves, and then when the sealing valve block moves out of the sliding sealing cavity, the air inlet channel and the air outlet channel of the air inlet and outlet assembly are connected, and since the air inlet channel is connected with the gas pipeline of the ventilation system, the gas in the ventilation system can be discharged through the air inlet channel and the air outlet channel to reduce the pressure in the ventilation system to the normal pressure range, at this time, the sealing valve body of the valve core slides downward into the sliding sealing cavity under the restoring force of the spring, so that the air inlet channel and the air outlet channel are not connected with each other, thereby ensuring the stability of the pressure in the ventilation system, and the linear bearing reduces the moving resistance of the valve core and the restoring force of the spring for resetting the valve core, so that the ventilation system can open the exhaust one-way valve to discharge and reduce the pressure under the condition of the micro-pressure difference, and the exhaust efficiency is improved; and the exhaust one-way valve mainly comprises a valve body, a linear bearing, a spring, a valve core and an air inlet and outlet assembly, and has the advantages of simple structure, convenient use and maintenance and reduced production cost. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 FIG. 1 is a perspective view of a micro-pressure exhaust one-way valve for main cable dehumidification according to an embodiment of the present application.

[0013] Figure 2 FIG. 2 is a perspective exploded view of a micro-pressure exhaust one-way valve for main cable dehumidification according to an embodiment of the present application.

[0014] Figure 3 FIG. 3 is a sectional view (1) of a micro-pressure exhaust one-way valve for main cable dehumidification according to an embodiment of the present application.

[0015] Figure 4 FIG. 4 is a sectional view (2) of a micro-pressure exhaust one-way valve for main cable dehumidification according to an embodiment of the present application.

[0016] Figure 5 FIG. 5 is a perspective view of an air inlet and outlet assembly of a micro-pressure exhaust one-way valve for main cable dehumidification according to an embodiment of the present application.

[0017] Figure 6 FIG. 6 is a structure schematic diagram of a micro-pressure exhaust one-way valve for main cable dehumidification in use according to an embodiment of the present application.

[0018] Mark No. : 1, valve body; 2, linear bearing; 3, spring; 4, valve core; 41, sealing valve block; 42, sliding column; 5, intake and exhaust assembly; 51, support block; 52, connecting block; 53, sliding groove; 6, mounting groove; 7, intake passage; 8, exhaust passage; 9, gas pipeline; 10, sliding sealing cavity. DETAILED DESCRIPTION

[0019] In order to make the content of the present application more easily understood, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be noted that the words "front", "back", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings, and the words "inner" and "outer" refer to the directions towards or away from the geometric center of a specific component. Figure 3

[0020] As shown in FIG. 1, the valve body 1 is provided with a linear bearing 2, a spring 3, a valve core 4, a sealing valve block 41, a sliding column 42, an intake and exhaust assembly 5, a mounting groove 6, an intake passage 7, an exhaust passage 8, a gas pipeline 9 and a sliding sealing cavity 10. Figures 1-6 ​The utility model discloses a kind of main cable dehumidification micro-pressure exhaust one-way valves, including valve body 1, linear bearing 2, spring 3, valve core 4 and air intake and exhaust assembly 5, valve body 1 bottom is inwardly recessed and is equipped with installation groove 6, installation groove 6 groove bottom is equipped with linear bearing 2 by screw embedding installation, installation groove 6 is fixedly installed and is equipped with air intake and exhaust assembly 5;Specifically, air intake and exhaust assembly 5 includes support block 51, connecting block 52 and sliding groove 53, the shape size of support block 51 outer side wall is compatible with the shape size of installation groove 6 inner side wall, support block 51 and installation groove 6 are cylindrical structure, to facilitate installation dismounting when use, support block 51 is fixedly installed in installation groove 6, support block 51 top center position recess is equipped with sliding groove 53, valve core 4 is slidably arranged in sliding groove 53;Specifically, valve core 4 includes sealing valve block 41 and sliding column 42, sliding column 42 is slidably arranged in linear bearing 2, to reduce the resistance when entire valve core 4 sliding movement, in turn can realize micro-pressure difference condition under pressure push valve core 4 open exhaust one-way valve and exhaust pressure relief, the lower end of sliding column 42 is fixedly connected with the upper end of sealing valve block 41 and integrally formed, sliding column 42 is externally sleeved with spring 3, spring 3 is arranged between linear bearing 2 and sealing valve block 41, the arrangement of spring 3 can provide the restoring force of valve core 4 reset to guarantee the closing of exhaust one-way valve, the outer side wall of sealing valve block 41 is cylindrical structure, the shape size of sealing valve block 41 outer side wall is compatible with the shape size of sliding groove 53 inner side wall, the arrangement can better guarantee the sliding connection of sealing valve block 41 and sliding groove 53, sealing valve block 41 is slidably arranged in sliding groove 53.In addition, the support block 51 is equidistantly provided with a plurality of grooves on the side, and the upper end of each groove is communicated with the sliding groove 53 and the lower end is communicated with the bottom surface of the support block 51 to form an exhaust passage 8. The bottom of the support block 51 is integrally provided with a connecting block 52 which is a cylindrical structure for easy installation on the gas pipeline 9, and the outer diameter of the connecting block 52 is smaller than the outer diameter of the support block 51. This arrangement ensures that the exhaust passage 8 provided on the outer periphery of the support block 51 can be communicated with the bottom surface and has space for installing the support block 51 in the mounting groove 6 of the valve body 1 through screws. A through hole is provided in the middle of the connecting block 52, which communicates the sliding groove 53 with the bottom surface of the connecting block 52 to form an air inlet passage 7. The connecting block 52 is fixedly installed on the gas pipeline 9, and the air inlet passage 7 is communicated with the inside of the gas pipeline 9. The air inlet passage 7 is communicated with the exhaust passage 8 through the sliding groove 53. The height difference between the communication position of the exhaust passage 8 and the groove bottom position of the sliding groove 53 forms a sliding sealing cavity 10. When the sealing valve block 41 slides upward above the sliding sealing cavity 10 against the elastic force of the spring 3, the air inlet passage 7 and the exhaust passage 8 are communicated with each other, thereby realizing the opening of the exhaust one-way valve under the condition of micro pressure difference to discharge pressure relief. When the sealing valve block 41 slides into the sliding sealing cavity 10 under the restoring force of the spring 3, the outer side wall of the sealing valve block 41 and the inner side wall of the sliding groove 53 are in sliding sealing connection, and the air inlet passage 7 and the exhaust passage 8 are not communicated with each other, so as to ensure the closing of the exhaust one-way valve. In addition, the support block 51 of the air inlet and outlet assembly 5 is fixedly installed in the mounting groove 6 by screws, so as to replace the air inlet and outlet assembly 5 in the valve body 1 and the spring 3 sleeved on the valve core 4. In actual application, the height of the sliding sealing cavity 10 in different air inlet and outlet assemblies 5 and the rigidity of the spring 3 are suitable for the micro pressure relief conditions required in different ventilation systems, so that in different ventilation systems, the air inlet and outlet assembly 5 with corresponding height of the sliding sealing cavity 10 and the spring 3 with corresponding rigidity can be selected according to the required micro pressure relief conditions, so as to meet the requirements of the ventilation system.

[0021] In summary, when the pressure in the ventilation system exceeds the normal pressure value and the pressure difference between the two is a micro pressure difference, the pressure generated by the micro pressure difference can push the sealing valve block 41 of the valve core 4 to slide upward against the elastic force of the spring 3, and the sliding column 42 of the valve core 4 slides in the linear bearing 2 to reduce the resistance when the valve core 4 moves, and then when the sealing valve block 41 moves out of the sliding sealing cavity 10, the air inlet channel 7 and the air outlet channel 8 of the air inlet and outlet assembly 5 are connected, and since the air inlet channel 7 is connected with the gas pipeline 9 of the ventilation system, the gas in the ventilation system can be discharged through the air inlet channel 7 and the air outlet channel 8, so that the pressure in the ventilation system is reduced to the normal pressure range, at this time the sealing valve body 1 of the valve core 4 slides downward into the sliding sealing cavity 10 under the restoring force of the spring 3, so that the air inlet channel 7 and the air outlet channel 8 are not connected with each other, so as to ensure the stability of the pressure in the ventilation system. The exhaust one-way valve reduces the moving resistance of the valve core 4 through the linear bearing 2 and provides the restoring force of the valve core 4 to reset the spring 3, so that the ventilation system can open the exhaust one-way valve to discharge and reduce pressure under the condition of micro pressure difference, and the exhaust efficiency is improved. The exhaust one-way valve is mainly composed of the valve body 1, the linear bearing 2, the spring 3, the valve core 4 and the air inlet and outlet assembly 5, which has simple structure, is convenient to use and maintain, and reduces the production cost.

[0022] The above examples are only used to illustrate the technical solutions of the embodiments of the present application, but not to limit them. Although the embodiments of the present application have been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can be modified or some technical features can be replaced by equivalents without departing from the spirit and scope defined by the claims of the present application.

Claims

1. A micro-pressure exhaust one-way valve for dehumidification of a main cable, comprising a valve body (1), a linear bearing (2), a spring (3), a valve core (4) and an air inlet and exhaust assembly (5), characterized in that, The bottom of the valve body (1) is inwardly recessed to be provided with a mounting groove (6), the bottom of which is embeddedly provided with a linear bearing (2), and the inside of which is fixedly provided with an air inlet and exhaust assembly (5), the air inlet and exhaust assembly (5) is respectively provided with an air inlet channel (7) and an air exhaust channel (8) and both of which are communicated, the upper end of the valve core (4) is slidably connected with the linear bearing (2), the lower end of the valve core (4) is slidably arranged in the air inlet and exhaust assembly (5), when the lower end of the valve core (4) slides to the air inlet channel (7), the lower end of the valve core (4) is sealingly connected with the air inlet and exhaust assembly (5) and the air inlet channel (7) and the air exhaust channel (8) are not communicated with each other, a spring (3) is sleeved on the valve core (4) and arranged between the linear bearing (2) and the valve core (4), when the valve core (4) slides upward against the elastic force of the spring (3), the lower end of the valve core (4) is separated from the air inlet channel (7) and slides to the position of the air exhaust channel (8), the air inlet channel (7) and the air exhaust channel (8) are communicated with each other, the air inlet and exhaust assembly (5) is further fixedly arranged on a gas pipeline (9), the inside of the gas pipeline (9) is communicated with the air inlet channel (7).

2. The micro-pressure exhaust one-way valve for dehumidification of a main cable according to claim 1, characterized in that, The air inlet and exhaust assembly (5) comprises a support block (51), a connecting block (52) and a sliding groove (53), the shape and size of the outer side wall of the support block (51) are matched with the shape and size of the inner side wall of the mounting groove (6), the support block (51) is fixedly installed in the mounting groove (6), the sliding groove (53) is recessed at the top center position of the support block (51), the shape and size of the inner side wall of the sliding groove (53) are matched with the shape and size of the outer side wall of the lower end of the valve core (4), the lower end of the valve core (4) is slidably arranged in the sliding groove (53), a plurality of grooves are equidistantly formed in the circumferential side of the support block (51), the upper end of each groove is communicated with the sliding groove (53), the lower end of each groove is communicated with the bottom surface of the support block (51) to form the exhaust passage (8), the connecting block (52) is integrally formed at the bottom of the support block (51), a through hole is formed in the middle of the connecting block (52), the through hole is communicated with the sliding groove (53) and the bottom surface of the connecting block (52) to form the air inlet passage (7), the connecting block (52) is fixedly installed on the gas pipeline (9), the air inlet passage (7) is communicated with the inside of the gas pipeline (9), the air inlet passage (7) is communicated with the exhaust passage (8) through the sliding groove (53), the height of the communication position of the exhaust passage (8) and the sliding groove (53) is higher than the height of the groove bottom position of the sliding groove (53), and the height difference between the two forms a sliding sealing cavity (10), when the lower end of the valve core (4) is located in the sliding sealing cavity (10), the outer side wall of the lower end of the valve core (4) is in sliding sealing connection with the inner side wall of the sliding groove (53), and the air inlet passage (7) and the exhaust passage (8) are not communicated with each other, when the lower end of the valve core (4) slides to above the sliding sealing cavity (10), the air inlet passage (7) and the exhaust passage (8) are communicated with each other.

3. The micro-pressure exhaust one-way valve for dehumidification of a main cable according to claim 2, characterized in that, The valve core (4) comprises a sealing valve block (41) and a sliding column (42), the sliding column (42) is slidably arranged in the linear bearing (2), the lower end of the sliding column (42) is fixedly connected with the upper end of the sealing valve block (41), the sliding column (42) is sleeved with the spring (3), the spring (3) is arranged between the linear bearing (2) and the sealing valve block (41), the shape and size of the outer side wall of the sealing valve block (41) are matched with the shape and size of the inner side wall of the sliding groove (53), and the sealing valve block (41) is slidably arranged in the sliding groove (53), when the sealing valve block (41) slides into the sliding sealing cavity (10), the outer side wall of the sealing valve block (41) is in sliding sealing connection with the inner side wall of the sliding groove (53).

4. The micro-pressure exhaust one-way valve for dehumidification of a main cable according to claim 3, characterized in that, The outer side wall of the sealing valve block (41) is in a cylindrical structure.

5. The micro-pressure exhaust one-way valve for dehumidification of a main cable according to claim 2, characterized in that, The support block (51) and the connecting block (52) are both in a cylindrical structure.

6. The micro-pressure exhaust one-way valve for dehumidification of a main cable according to claim 5, characterized in that, The outer diameter of the connecting block (52) is smaller than the outer diameter of the support block (51).

7. The micro-pressure exhaust one-way valve for dehumidification of a main cable according to claim 2, characterized in that, The support block (51) is fixedly installed in the installation groove (6) of the valve body (1) by a screw.

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