Gas seal lift valve convenient for blocking waste gas

Abstract

The utility model relates to the technical field of lift valves, in particular to an air seal lift valve convenient for blocking waste gas, which comprises a valve body, the top of the valve body is fixedly connected with an air cylinder, the output end of the air cylinder penetrates into the valve body to be connected with the top of a motor, and the output end of the motor is provided with an air seal assembly. Impurities in waste gas are filtered through a filter screen, the situation that the sealing plate, the sealing strip and the sealing ring of the lifting valve cannot be completely closed and waste gas leaks due to the fact that the impurities are attached to the surfaces of the sealing ring, the sealing plate and the sealing strip is prevented, a threaded rod is driven by a motor to rotate, and a threaded sleeve is in threaded connection with the threaded rod; therefore, the threaded sleeve drives the connecting disc to move up and down in the direction of the guide rod, the sealing plate at the bottom is driven to block or circulate waste gas, the problem that the lifting valve cannot work under the condition that gas of the air cylinder is cut off accidentally is effectively solved, and double insurance is more reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting valves, in particular to a gas-sealed lifting valve which is convenient for blocking exhaust gas. Background Art

[0002] The lifting valve is a cylinder lifting valve, or cylinder lifting valve, referred to as cylinder. Standard cylinder lifting valves are applicable to all walks of life. Cylinders used in dust removal equipment are generally equipped with lifting valves and electromagnetic pulse valves. Lifting valves are widely used. For example, they mainly play a role of cutting off and throttling in pipelines. They can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. A large amount of waste gas will be generated in industrial production, and lifting valves are needed to control the discharge of these waste gases. Therefore, we propose a gas-sealed lifting valve that is easy to block waste gas.

[0003] In the process of realizing the utility model, the inventors found that the prior art had the following problems: 1. The existing lifting valve can realize the on and off of exhaust gas, but after long-term use, impurities such as smoke and dust in the exhaust gas will adhere to the surface of the sealing ring, resulting in a decrease in the sealing effect of the lifting valve; 2. If the cylinder is cut off during the use of the existing lifting valve, the sealing plate in the valve body loses thrust and cannot work. Utility Model Content

[0004] The purpose of the utility model is to provide an air-sealed lifting valve that is convenient for blocking exhaust gas, so as to solve the problems raised in the above background technology. To achieve the above purpose, the utility model provides the following technical solutions: an air-sealed lifting valve that is convenient for blocking exhaust gas, comprising a valve body, a cylinder is fixedly connected to the top of the valve body, the output end of the cylinder passes through the inside of the valve body and is connected to the top of the motor, an air-sealing assembly is provided at the output end of the motor, an air outlet is provided on the right side of the valve body, an air inlet is provided at the bottom end of the valve body, and a filter assembly is provided inside the air inlet.

[0005] Further preferably, the air seal assembly includes a threaded rod fixedly connected to the output end of the motor, the bottom end of the threaded rod is threadedly connected to a threaded sleeve, the threaded sleeve is fixedly connected to the top surface of the connecting disk, and a hole is opened in the middle of the connecting disk, and the diameter of the hole is larger than the diameter of the threaded rod.

[0006] Further preferably, a connecting rod is fixedly connected to one side of the connecting disk, a guide rod passes through the middle of one end of the connecting rod away from the connecting disk, and the guide rod is fixedly connected between the inner walls of the air outlet.

[0007] Further preferably, two buffer springs and two sliding rods are fixedly connected to the bottom surface of the connecting plate, and the two sliding rods are respectively slidably connected to the inside of the sleeve; the two buffer springs can play a buffering role when the connecting plate is pushed down by the cylinder, and the sliding rod cooperates with the sleeve to make the buffer spring more stable during extension and contraction, thereby preventing the buffer spring from tilting left and right.

[0008] Further preferably, the sleeve is fixedly connected to the top surface of the sealing plate, the bottom surface of the sealing plate is fixedly connected with a sealing strip, the sealing strip is movably connected to the inside of the sealing groove, the sealing groove is opened on the top surface of the sealing ring, the sealing ring is fixedly connected to the inner wall of the air inlet, the sealing strip is annular, and the width of the sealing strip is consistent with the width of the sealing groove.

[0009] Further preferably, the filter assembly includes a locking ring fixedly connected to the inner wall of the air inlet, the locking ring has a plurality of mounting holes formed inside, a locking spring is fixedly connected inside each of the plurality of mounting holes, and a locking ball is fixedly connected to one end of the locking spring close to the center axis of the locking ring.

[0010] Further preferably, the locking ball is clamped in the locking groove, the locking groove is opened on the side of the filter, two positioning holes are opened on both sides of the bottom surface of the filter, and a positioning pin passes through the middle of the two positioning holes, the top of the positioning pin is fixedly connected to the bottom surface of the locking ring, and a handle is provided in the middle of the bottom surface of the filter.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] In the utility model, impurities in the exhaust gas are filtered through a filter screen to prevent these impurities from adhering to the surfaces of the sealing ring, the sealing plate and the sealing strip, thereby preventing the sealing plate, the sealing strip and the sealing ring of the lifting valve from being completely closed, thereby causing exhaust gas leakage.

[0013] In the utility model, the threaded rod is driven to rotate by starting the motor. Since the threaded sleeve is threadedly connected to the threaded rod and the threaded sleeve is fixedly connected to the connecting plate, which is slidably connected to the guide rod through the connecting rod, the threaded sleeve cannot drive the connecting plate to rotate but can only drive the connecting plate to move up and down along the direction of the guide rod, driving the sealing plate at the bottom to block or circulate the exhaust gas, effectively preventing the problem of the lifting valve not being able to work when the cylinder is accidentally cut off. The double insurance is more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the front cross-sectional structure of the utility model;

[0016] Figure 3 For this utility model Figure 2 A is an enlarged structural diagram;

[0017] Figure 4 For this utility model Figure 2 The enlarged structural diagram at B in FIG.

[0018] Figure 5 This is a schematic diagram of the front cross-sectional structure of the locking ring of the utility model;

[0019] Figure 6 For this utility model Figure 5 The enlarged structural diagram at C in FIG.

[0020] Figure 7 This is a schematic diagram of the handle structure of the utility model;

[0021] Figure 8 This is a schematic diagram of the filter structure of the utility model.

[0022] In the figure: 1. valve body; 2. cylinder; 3. motor; 4. gas seal assembly; 401. threaded rod; 402. threaded sleeve; 403. connecting plate; 404. connecting rod; 405. guide rod; 406. buffer spring; 407. sliding rod; 408. sleeve; 409. sealing plate; 4010. sealing strip; 4011. sealing groove; 4012. sealing ring; 5. air outlet; 6. air inlet; 7. filter assembly; 701. locking ring; 702. mounting hole; 703. locking spring; 704. locking ball; 705. locking groove; 706. filter screen; 707. positioning hole; 708. positioning pin; 709. handle. DETAILED DESCRIPTION

[0023] 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. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technical personnel in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figures 1 to 8 The utility model provides a technical solution: an air-sealed lifting valve for blocking exhaust gas, comprising a valve body 1, a cylinder 2 is fixedly connected to the top of the valve body 1, the output end of the cylinder 2 passes through the interior of the valve body 1 and is connected to the top of a motor 3, an air-sealing component 4 is provided at the output end of the motor 3, an air outlet 5 is provided on the right side of the valve body 1, an air inlet 6 is provided at the bottom end of the valve body 1, and a filter component 7 is provided inside the air inlet 6.

[0025] In this embodiment, Figure 2 , Figure 3 and Figure 5 As shown, the gas seal assembly 4 includes a threaded rod 401 fixedly connected to the output end of the motor 3, the bottom end of the threaded rod 401 is threadedly connected with a threaded sleeve 402, the threaded sleeve 402 is fixedly connected to the top surface of the connecting disk 403, the middle part of the connecting disk 403 is provided with a hole, and the diameter of the hole is larger than the diameter of the threaded rod 401, one side of the connecting disk 403 is fixedly connected with a connecting rod 404, the middle part of the end of the connecting rod 404 away from the connecting disk 403 is penetrated by a guide rod 405, and the guide rod 405 is fixedly connected between the inner walls of the air outlet 5; under normal working conditions, the lifting valve relies on the expansion and contraction of the cylinder 2 to drive the internal sealing plate 409 to rise and fall, so as to realize The opening and closing between the sealing plate 409 and the sealing ring 4012 controls the flow of exhaust gas. When the cylinder 2 is de-energized, the motor 3 drives the threaded rod 401 to rotate. Because the threaded sleeve 402 is threadedly connected to the threaded rod 401, and the threaded sleeve 402 is fixedly connected to the connecting disk 403, and the connecting disk 403 is slidably connected to the guide rod 405 through the connecting rod 404, the threaded sleeve 402 cannot drive the connecting disk 403 to rotate, but can only drive the connecting disk 403 to move up and down along the direction of the guide rod 405, driving the sealing plate 409 at the bottom to block or circulate the exhaust gas, effectively preventing the lifting valve from failing to work when the cylinder 2 is accidentally de-energized. The double insurance is more reliable. The bottom surface of the connecting plate 403 is fixedly connected with two buffer springs 406 and two sliding rods 407. The two sliding rods 407 are slidably connected to the inside of the sleeve 408. The two buffer springs 406 can play a buffering role when the connecting plate 403 is pushed down by the cylinder 2, and the sliding rod 407 cooperates with the sleeve 408 to make the buffer spring 406 more stable when it is extended and retracted, so as to avoid the buffer spring 406 from tilting left and right. The sleeve 408 is fixedly connected to the top surface of the sealing plate 409, and the bottom surface of the sealing plate 409 is fixedly connected with a sealing strip 4010, which is movably connected to the sealing groove 4 011, a sealing groove 4011 is opened on the top surface of a sealing ring 4012, and the sealing ring 4012 is fixedly connected to the inner wall of the air inlet 6. The sealing strip 4010 is annular, and the width of the sealing strip 4010 is consistent with the width of the sealing groove 4011. When the sealing strip 4010 is squeezed into the sealing groove 4011 by the sealing plate 409, both sides of the sealing strip 4010 fit tightly with the inner wall of the sealing groove 4011, which can effectively block the exhaust gas. At the same time, under the action of the buffer spring 406, the sealing plate 409 is subjected to the reaction force of the buffer spring 406, and will fit more closely with the sealing ring 4012, so that the sealing effect is better.

[0026] In this embodiment, Figure 2 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, the filter assembly 7 includes a locking ring 701 fixedly connected to the inner wall of the air inlet 6, a plurality of mounting holes 702 are provided inside the locking ring 701, a locking spring 703 is fixedly connected inside the plurality of mounting holes 702, a locking ball 704 is fixedly connected to one end of the locking spring 703 close to the central axis of the locking ring 701, the locking ball 704 is clamped in the locking groove 705, the locking groove 705 is provided on the side of the filter screen 706, two positioning holes 707 are provided on both sides of the bottom surface of the filter screen 706, a positioning pin 708 is passed through the middle of the two positioning holes 707, the top of the positioning pin 708 is fixedly connected to the bottom surface of the locking ring 701, and a handle 709 is provided in the middle of the bottom surface of the filter screen 706; the positioning holes 707 and the positioning pin 70 8 helps the filter 706 to be positioned quickly. When installing the filter 706, align the positioning hole 707 with the positioning pin 708 and insert it. At this time, the locking groove 705 on the side of the filter 706 corresponds to the locking ball 704 on the inner wall of the locking ring 701 one by one, so as to avoid the difficulty in accurately inserting the locking ball 704 into the locking groove 705 when installing the filter 706, which leads to a slow installation speed. The filter 706 can filter impurities in the exhaust gas and prevent impurities such as smoke and dust in the exhaust gas from adhering to the surface of the sealing ring 4012, resulting in a decrease in the sealing effect of the lifting valve. When disassembly is required, pull the handle 709 hard, and the filter 706 will be squeezed into the locking groove 705 by the force. At this time, the filter 706 can be pulled out of the locking ring 701 to complete the disassembly.

[0027] The use method and advantages of the utility model: When the gas-sealed lifting valve that is convenient for blocking exhaust gas is used, the working process is as follows:

[0028] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, first, the air inlet 6 and the air outlet 5 of the lifting valve are connected to the pipeline respectively. When exhaust is needed, the cylinder 2 contracts and drives the gas seal assembly 4 at the bottom to move upward, so that the sealing strip 4010 on the bottom of the sealing plate 409 is separated from the sealing groove 4011, and the sealing plate 409 gradually moves upward to the left side of the air outlet 5. At this time, the exhaust gas enters the valve body 1 from the air inlet 6 and is discharged from the air outlet 5. Similarly, when the output end of the cylinder 2 is extended, the sealing plate 409 can be pushed down and closed to block the discharge of the exhaust gas. When the cylinder 2 is out of air, the motor 3 The threaded rod 401 is driven to rotate when starting, because the threaded sleeve 402 is threadedly connected to the threaded rod 401, and the threaded sleeve 402 is fixedly connected to the connecting plate 403, and the connecting plate 403 is slidably connected to the guide rod 405 through the connecting rod 404. Therefore, the threaded sleeve 402 cannot drive the connecting plate 403 to rotate, but can only drive the connecting plate 403 to move up and down along the direction of the guide rod 405, driving the sealing plate 409 at the bottom to block or circulate the exhaust gas, effectively preventing the problem that the lifting valve cannot work when the cylinder 2 is accidentally cut off. The double insurance is more reliable. Before the exhaust gas enters the valve body 1, it will first pass through the filter screen 706. The filter screen 706 filters the impurities in the exhaust gas to prevent these impurities from adhering to the surface of the sealing ring 4012, the sealing plate 409 and the sealing strip 4010, which will cause the sealing plate 409, the sealing strip 4010 and the sealing ring 4012 of the poppet valve to be unable to be completely closed, resulting in exhaust gas leakage. When installing the filter screen 706, the positioning hole 707 and the positioning pin 708 help the filter screen 706 to be quickly positioned. When installing the filter 706, align the positioning hole 707 with the positioning pin 708 and insert it. At this time, the locking groove 705 on the side of the filter 706 corresponds to the locking ball 704 on the inner wall of the locking ring 701 one by one, so as to avoid difficulty in accurately inserting the locking ball 704 into the locking groove 705 when installing the filter 706, which causes the installation speed to slow down. When disassembly is required, pull the handle 709 hard, and the filter 706 will be squeezed into the locking groove 705 by the force. At this time, the filter 706 can be pulled out of the locking ring 701 to complete the disassembly.

[0029] The above shows and describes the basic principle, main features and advantages of the utility model. Technical staff in this industry should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A gas-sealed lifting valve for blocking exhaust gas, comprising a valve body (1), characterized in that: The top of the valve body (1) is fixedly connected to a cylinder (2), the output end of the cylinder (2) passes through the interior of the valve body (1) and is connected to the top of the motor (3), the output end of the motor (3) is provided with a gas seal assembly (4), the right side of the valve body (1) is provided with an air outlet (5), the bottom end of the valve body (1) is provided with an air inlet (6), and the interior of the air inlet (6) is provided with a filter assembly (7).

2. The gas-sealed lifting valve for isolating exhaust gas according to claim 1, characterized in that: The air seal assembly (4) comprises a threaded rod (401) fixedly connected to the output end of the motor (3); a threaded sleeve (402) is threadedly connected to the bottom end of the threaded rod (401); the threaded sleeve (402) is fixedly connected to the top surface of a connecting disk (403); a hole is provided in the middle of the connecting disk (403); and the diameter of the hole is greater than the diameter of the threaded rod (401).

3. The gas-sealed lifting valve for isolating exhaust gas according to claim 2, characterized in that: A connecting rod (404) is fixedly connected to one side of the connecting disk (403), a guide rod (405) penetrates the middle of one end of the connecting rod (404) away from the connecting disk (403), and the guide rod (405) is fixedly connected between the inner walls of the air outlet (5).

4. The gas-sealed lifting valve for isolating exhaust gas according to claim 2, characterized in that: Two buffer springs (406) and two sliding rods (407) are fixedly connected to the bottom surface of the connecting plate (403), and the two sliding rods (407) are slidably connected to the inside of the sleeve (408). The two buffer springs (406) can play a buffering role when the connecting plate (403) is pushed down by the cylinder (2), and the sliding rod (407) cooperates with the sleeve (408) to make the buffer spring (406) more stable when extending and retracting, thereby preventing the buffer spring (406) from tilting left and right.

5. The gas-sealed lifting valve for isolating exhaust gas according to claim 4, characterized in that: The sleeve (408) is fixedly connected to the top surface of the sealing plate (409), the bottom surface of the sealing plate (409) is fixedly connected to a sealing strip (4010), the sealing strip (4010) is movably connected to the inside of the sealing groove (4011), the sealing groove (4011) is opened on the top surface of the sealing ring (4012), the sealing ring (4012) is fixedly connected to the inner wall of the air inlet (6), the sealing strip (4010) is annular, and the width of the sealing strip (4010) is consistent with the width of the sealing groove (4011).

6. The gas-sealed lifting valve for isolating exhaust gas according to claim 1, characterized in that: The filter assembly (7) comprises a locking ring (701) fixedly connected to the inner wall of the air inlet (6); a plurality of mounting holes (702) are provided inside the locking ring (701); a locking spring (703) is fixedly connected inside each of the mounting holes (702); and a locking ball (704) is fixedly connected to one end of the locking spring (703) close to the central axis of the locking ring (701).

7. The gas-sealed lifting valve for isolating exhaust gas according to claim 6, characterized in that: The locking ball (704) is clamped inside the locking groove (705). The locking groove (705) is provided on the side of the filter (706). Two positioning holes (707) are provided on both sides of the bottom surface of the filter (706). A positioning pin (708) passes through the middle of the two positioning holes (707). The top end of the positioning pin (708) is fixedly connected to the bottom surface of the locking ring (701). A handle (709) is provided in the middle of the bottom surface of the filter (706).

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