V-shaped ball valve structure for chemical waste gas treatment

Abstract

The utility model relates to a V type ball valve structure for chemical waste gas treatment relates to valve technical field, including lower valve body, one side of lower valve body is provided with air inlet pipe, the other side of lower valve body is provided with air outlet pipe, the valve seat in lower valve body inside is installed with hemisphere, and the bottom of hemisphere is rotatably connected with the valve seat in lower valve body inside, the upper end of lower valve body is welded with upper valve body, the inside rotation of upper valve body is installed with valve rod, and the bottom of valve rod is fixed with hemisphere, the upper end fixed mounting of upper valve body has transmission seat, the inside rotation of transmission seat is installed with worm wheel, and the shaft of worm wheel bottom is connected with valve rod key, one side of worm wheel is installed with worm, and the rear end of worm is connected with transmission seat through bearing, and the scheme solves the problem that V type ball valve stability is poor and operating mechanism is easy to appear dislocation because of collision.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a V-type ball valve structure for chemical waste gas treatment. Background Technology

[0002] The V-type ball valve for chemical waste gas treatment consists of a valve body, internal components, an actuator, and a sealing structure. The valve body is typically made of carbon steel (WCB) or stainless steel (304 / 316 / 316L), and is available in straight-through casting. Common connection methods include flange and wafer types, adaptable to various piping systems. Regarding the internal components, the core V-type valve core is a 1 / 4-inch ball shell with a V-shaped notch, which fits tightly with a valve seat made of PTFE, special PPL, or metal to ensure a tight seal when closed. The valve stem connects the valve core to the actuator to transmit torque.

[0003] For example, the Chinese authorized patent CN209245328U, entitled "A V-type ball valve", includes a valve body, a valve seat, an end cap, a ball, and a valve stem. A first medium channel is formed in the valve body, and a second medium channel is formed in the ball. A V-shaped notch is provided on the side wall of one end of the second medium channel. The plane of the V-shaped notch is parallel to the axial direction of the second medium channel. The end cap is provided at both ends of the ball, and an annular groove is provided at the end of the end cap near the ball. The valve seat is fitted in the annular groove, and an elastic washer is provided between the valve seat and the bottom of the annular groove.

[0004] While the aforementioned existing technologies can be used for opening and closing operations of chemical waste gas pipelines, the ball valve is prone to instability due to changes in the gas flow rate, which affects its flow regulation performance. Furthermore, the operating mechanism is prone to displacement due to collisions, which can easily lead to errors in flow regulation. Therefore, these technologies do not meet current requirements. To address this, we propose a V-type ball valve structure for chemical waste gas treatment. Utility Model Content

[0005] The purpose of this utility model is to provide a V-type ball valve structure for chemical waste gas treatment, so as to solve the problems of poor stability of V-type ball valves and easy displacement of the operating mechanism due to collision mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a V-type ball valve structure for chemical waste gas treatment, comprising a lower valve body, an inlet pipe on one side of the lower valve body, an outlet pipe on the other side of the lower valve body, a hemisphere installed in a valve seat inside the lower valve body, the bottom of the hemisphere being rotatably connected to the valve seat inside the lower valve body, an upper valve body welded and fixed to the upper end of the lower valve body, a valve stem rotatably installed inside the upper valve body, the bottom of the valve stem being fixed to the hemisphere, a transmission seat fixedly installed at the upper end of the upper valve body, a worm gear rotatably installed inside the transmission seat, the shaft at the bottom of the worm gear being keyed to the valve stem, a worm being installed on one side of the worm gear, and the rear end of the worm being connected to the transmission seat via a bearing.

[0007] Preferably, a connecting rod is mounted on one side of the front end of the transmission seat via a bearing, and the front end of the worm gear is fixed to the connecting rod. An octagonal groove is provided inside the front end of the connecting rod. A fixing block is welded and fixed on the other side of the front end of the transmission seat. A second rotating shaft slides inside the fixing block. A plug is fixedly provided at one end of the second rotating shaft, and the plug is inserted into the octagonal groove. A handwheel is fixedly provided at the other end of the second rotating shaft.

[0008] Preferably, a filter screen is installed inside the air intake pipe, and the filter screen is engaged with the inner wall of the air intake pipe.

[0009] Preferably, a first rotating shaft is rotatably mounted at the center of the filter screen, an impeller is mounted on one side of the first rotating shaft, and a brush is mounted on the other side of the first rotating shaft, with the bristles of the brush in contact with the filter screen.

[0010] Preferably, a sealing packing is provided between the upper valve body and the valve stem.

[0011] Preferably, both the inlet pipe and the outlet pipe are provided with flanges at their outer ends.

[0012] Preferably, the top of the transmission seat is provided with a detachable top cover.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model features a self-locking hemispherical transmission structure. Through the cooperation of a worm and a worm wheel, the spiral friction transmission surface between the worm and worm wheel effectively resists the unstable forces exerted on the hemispherical body by the airflow during the valve stem and hemispherical body rotation process for opening adjustment. The rotation of the worm wheel is precisely controlled by the worm, and airflow impacts are unlikely to interfere with its stable transmission, thus ensuring the stability of the ball valve under different airflow velocities. This greatly improves the stability of the ball valve's flow regulation performance. Furthermore, due to the self-locking effect of the worm and worm wheel, the valve stem and hemispherical body will not rotate unexpectedly due to collisions, effectively preventing displacement of the operating mechanism and flow regulation errors caused by collisions.

[0015] 2. This utility model adopts a movable handwheel structure. After adjusting the opening of the hemisphere by the handwheel, the operator can pull the handwheel outward to allow the insertion rod at one end of the handwheel to retract from the octagonal groove inside the connecting rod. At the same time, the handwheel will not fall off due to the limiting of the inner sliding groove of the fixing block. This avoids the change of the adjusted ball valve opening due to accidental contact with the handwheel during daily operation. When the ball valve opening needs to be adjusted again, the operator does not need to find or install the handwheel again and can operate directly, which greatly improves work efficiency.

[0016] 3. This utility model, by installing a filter screen in the air intake pipe, can block particulate matter in the exhaust gas, preventing it from entering the valve body assembly and reducing its service life. Simultaneously, a first rotating shaft is installed at the center of the filter screen. When gas passes through, the impeller at the rear of the first rotating shaft rotates under the reaction force, thereby driving the brush at the front of the first rotating shaft to rotate. The brush surface is in close contact with the filter screen, continuously cleaning the filter screen during rotation and brushing off the particulate matter adhering to it, preventing the filter screen from becoming clogged due to particulate matter accumulation. This ensures that the filter screen always maintains good permeability, maintaining a stable and efficient filtration effect on the exhaust gas, thus ensuring stable exhaust gas quality entering the ball valve, which is beneficial for the ball valve to perform stable and precise flow regulation. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0019] Figure 3 This is a three-dimensional view of the present invention after the transmission seat cover has been removed;

[0020] Figure 4 This is a perspective view of the hemispherical transmission structure of this utility model.

[0021] In the diagram: 1. Lower valve body; 2. Inlet pipe; 3. Outlet pipe; 4. Upper valve body; 5. Transmission seat; 6. Fixing block; 7. Handwheel; 8. Valve stem; 9. Worm gear; 10. Worm; 11. Filter screen; 12. First rotating shaft; 13. Impeller; 14. Brush; 15. Connecting rod; 16. Second rotating shaft; 17. Insert rod; 18. Octagonal groove; 19. Hemisphere. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Please see Figure 1-4 An embodiment of this utility model provides a V-type ball valve structure for chemical waste gas treatment, including a lower valve body 1, an inlet pipe 2 on one side of the lower valve body 1, an outlet pipe 3 on the other side of the lower valve body 1, a hemisphere 19 installed in the valve seat inside the lower valve body 1, and the bottom of the hemisphere 19 being rotatably connected to the valve seat inside the lower valve body 1, an upper valve body 4 welded and fixed to the upper end of the lower valve body 1, a valve stem 8 rotatably installed inside the upper valve body 4, and the bottom of the valve stem 8 being fixed to the hemisphere 19, a transmission seat 5 fixedly installed at the upper end of the upper valve body 4, a worm gear 9 rotatably installed inside the transmission seat 5, and the shaft at the bottom of the worm gear 9 being keyed to the valve stem 8, a worm 10 installed on one side of the worm gear 9, and the rear end of the worm 10 being connected to the transmission seat 5 through a bearing;

[0024] In use, the operator adjusts the valve opening by turning the handwheel. The shaft at one end of the handwheel drives the worm gear 10 to rotate via the connecting rod. The contact surface between the worm gear 10 and the worm wheel 9 forms a spiral friction transmission surface. The rotation of the worm gear 10 drives the worm wheel 9 to rotate, which in turn drives the valve stem 8 to rotate. In turn, the valve stem 8 drives the hemisphere 19 located inside the lower valve body 1 to rotate, thereby achieving the adjustment of the valve opening. Due to the self-locking effect of the worm gear 10 and the worm wheel 9, the valve stem 8 and the hemisphere 19 will not rotate unexpectedly due to collision, effectively preventing displacement of the operating mechanism and flow adjustment errors caused by collision.

[0025] Please see Figure 3 A connecting rod 15 is mounted on one side of the front end of the transmission seat 5 via a bearing, and the front end of the worm gear 10 is fixed to the connecting rod 15. An octagonal groove 18 is provided inside the front end of the connecting rod 15. A fixing block 6 is welded and fixed on the other side of the front end of the transmission seat 5. A second rotating shaft 16 slides inside the fixing block 6. A plug rod 17 is fixedly provided at one end of the second rotating shaft 16, and the plug rod 17 is inserted into the octagonal groove 18. A handwheel 7 is fixedly provided at the other end of the second rotating shaft 16. A detachable top cover is provided at the top of the transmission seat 5.

[0026] The operator rotates handwheel 7, which drives the second rotating shaft 16 and the insert rod 17 to rotate. The insert rod 17 rotates within the octagonal groove 18, which in turn drives the worm gear 10 to rotate via the connecting rod 15. When it is necessary to fix handwheel 7 to prevent accidental operation, handwheel 7 can be pushed to disengage the insert rod 17 from the octagonal groove 18. Advantages: Handwheel 7, through the cooperation of the insert rod 17 and the octagonal groove 18, enables convenient operation of rotating the worm gear 10, facilitating the operator's adjustment of the ball valve opening. The design of disengaging the insert rod 17 from the octagonal groove 18 effectively prevents accidental changes in the ball valve opening due to accidental activation of handwheel 7 after adjustment, further improving the stability of the ball valve opening adjustment. The removable top cover facilitates maintenance and repair of components such as the worm gear 9 and worm gear 10 inside the transmission seat 5.

[0027] Please see Figure 2 A filter screen 11 is installed inside the intake pipe 2, and the filter screen 11 is engaged with the inner wall of the intake pipe 2. When exhaust gas enters the intake pipe 2, the filter screen 11 intercepts particulate matter in the exhaust gas. This effectively prevents particulate matter in the exhaust gas from entering the valve body assembly, reduces wear on internal parts of the valve body, extends the service life of the valve body assembly, reduces equipment maintenance costs, and ensures stable operation of the ball valve.

[0028] Please see Figure 2 A first rotating shaft 12 is rotatably mounted at the center of the filter screen 11. An impeller 13 is mounted on one side of the first rotating shaft 12, and a brush 14 is mounted on the other side of the filter screen 11, with the bristles of the brush 14 in close contact with the filter screen 11. When exhaust gas passes through the inlet pipe 2, the airflow impacts the impeller 13, causing the impeller 13 to drive the first rotating shaft 12 to rotate. The first rotating shaft 12 then drives the brush 14 to rotate, and the rotating brush 14 cleans the filter screen 11. This achieves the self-cleaning function of the filter screen 11, preventing the filter screen 11 from becoming clogged due to particulate matter accumulation, ensuring that the filter screen 11 always has good filtration performance, maintaining a stable exhaust gas filtration effect, facilitating stable flow regulation by the ball valve, and ensuring the smooth operation of the chemical exhaust gas treatment process.

[0029] Furthermore, a sealing packing is provided between the upper valve body 4 and the valve stem 8. The sealing packing fills the gap between the upper valve body 4 and the valve stem 8 to prevent exhaust gas from leaking through this gap. This ensures the sealing performance of the ball valve, prevents exhaust gas leakage, avoids environmental pollution, and ensures stable internal pressure of the chemical exhaust gas treatment system.

[0030] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A V-type ball valve structure for treating chemical waste gas, comprising a lower valve body (1), characterized in that: An air inlet pipe (2) is provided on one side of the lower valve body (1), and an air outlet pipe (3) is provided on the other side of the lower valve body (1). A hemisphere (19) is installed in the valve seat inside the lower valve body (1), and the bottom of the hemisphere (19) is rotatably connected to the valve seat inside the lower valve body (1). An upper valve body (4) is welded and fixed to the upper end of the lower valve body (1). A valve stem (8) is rotatably installed inside the upper valve body (4), and the bottom of the valve stem (8) is fixed to the hemisphere (19). A transmission seat (5) is fixedly installed at the upper end of the upper valve body (4). A worm gear (9) is rotatably installed inside the transmission seat (5), and the shaft at the bottom of the worm gear (9) is keyed to the valve stem (8). A worm (10) is installed on one side of the worm gear (9), and the rear end of the worm (10) is connected to the transmission seat (5) through a bearing.

2. The V-type ball valve structure for chemical waste gas treatment according to claim 1, characterized in that: A connecting rod (15) is mounted on one side of the front end of the transmission seat (5) via a bearing, and the front end of the worm gear (10) is fixed to the connecting rod (15). An octagonal groove (18) is provided inside the front end of the connecting rod (15). A fixing block (6) is welded and fixed on the other side of the front end of the transmission seat (5). A second rotating shaft (16) slides inside the fixing block (6). A plug rod (17) is fixedly provided at one end of the second rotating shaft (16), and the plug rod (17) is inserted into the octagonal groove (18). A handwheel (7) is fixedly provided at the other end of the second rotating shaft (16).

3. The V-type ball valve structure for chemical waste gas treatment according to claim 1, characterized in that: The air intake pipe (2) is equipped with a filter screen (11), and the filter screen (11) is engaged with the inner wall of the air intake pipe (2).

4. The V-type ball valve structure for chemical waste gas treatment according to claim 3, characterized in that: A first rotating shaft (12) is rotatably installed at the center of the filter screen (11). An impeller (13) is installed on one side of the filter screen (11) on the first rotating shaft (12). A brush (14) is installed on the other side of the filter screen (11) on the first rotating shaft (12), and the bristles of the brush (14) are in contact with the filter screen (11).

5. The V-type ball valve structure for chemical waste gas treatment according to claim 1, characterized in that: A sealing packing is provided between the upper valve body (4) and the valve stem (8).

6. The V-type ball valve structure for chemical waste gas treatment according to claim 1, characterized in that: The outer ends of the air inlet pipe (2) and the air outlet pipe (3) are both provided with flanges.

7. The V-type ball valve structure for chemical waste gas treatment according to claim 1, characterized in that: The top of the transmission seat (5) is provided with a detachable cover.

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