A fluorine-lined fixed ball valve with DBB function

Abstract

The present invention discloses a fluorine-lined fixed ball valve with DBB function, which specifically relates to the field of corrosion-resistant valves, including a maintenance mechanism, wherein the maintenance mechanism includes an airbag, the top end of the airbag is clamped with a movable wheel frame, the inner side of the movable wheel frame is rotatably connected to an inner rotating gear frame, the inner side of the inner rotating gear frame is rotatably connected to a gear valve frame, the inner side of the gear valve frame is rotatably connected to a fixed rotating rod, and curved auxiliary push rods are provided on both sides of the fixed rotating rod. Lubricating oil is sucked into the central rotating valve, and at the same time, the tension of the pushing clamp block plus the restoring force of the fixed rotating rod cause the airbag to be in its original compressed state. It is explained here that when the pushing clamp block is in the original state of the airbag, it is in a normally open state, and a restoring spring is installed inside, so that it is automatically added through the transmission mechanism without the need for staff to open the valve. The overall operation is relatively simple and the maintenance efficiency is high.

Description

Technical Field

[0001] The present invention relates to the technical field of corrosion-resistant valves, and more particularly to a fluorine-lined fixed ball valve with DBB function. Background Art

[0002] With the rapid development of modern industry, fluorine-lined valves are widely used in chemical, petroleum, metallurgy, medicine and other industries. Especially in the production and transportation of media such as strong acids, alkalis and strong oxidants, fluorine-lined ball valves, as a special valve, can achieve the function of regulating or cutting off the media.

[0003] At present, the fluorine-lined ball valves on the market are mainly fluorine-lined floating ball valves. This type of structural ball valve is suitable for medium and low pressures, small diameters, large torques, and can only ensure sealing at the outlet end. It is a single-sided forced sealing valve.

[0004] However, after long-term use, the sealing surface of the current fluorine-lined fixed ball valve will wear out significantly, resulting in a decrease in the sealing performance of the valve. At the same time, lubricating oil needs to be added into the interior, which requires the staff to open the valve and add it through the transmission pipe. The overall operation is more troublesome and the maintenance efficiency is low. Therefore, we proposed a fluorine-lined fixed ball valve with DBB function. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a fluorine-lined fixed ball valve with DBB function, in which lubricating oil is sucked into the central rotating valve, and at the same time, the tension of the pushing clamp is added to the restoring force of the fixed rotating rod, causing the airbag to be in its original compressed state. It is explained here that when the pushing clamp is in the original state of the airbag, it is in a normally open state, and a restoring spring is installed inside to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a fluorine-lined fixed ball valve with DBB function, comprising a maintenance mechanism, the maintenance mechanism comprising an airbag, the top end of the airbag is clamped with a movable wheel frame, the inner side of the movable wheel frame is rotatably connected to the inner rotating gear frame, the inner side of the inner rotating gear frame is rotatably connected to the gear valve frame, the inner side of the gear valve frame is rotatably connected to a fixed rotating rod, curved auxiliary push rods are provided on both sides of the fixed rotating rod, the outer side of the curved auxiliary push rod is clamped with an extrusion push block, one side of the extrusion push block is clamped with a movable slider, the outer side of the movable slider is clamped with an auxiliary support frame, a torque spring rod is provided in the center of the auxiliary support frame, the top end of the torque spring rod is inserted into a limiting block frame, the top end of the limiting block frame is provided with an auxiliary push plate, and the top end of the auxiliary push plate is clamped with a lubricating oil storage frame.

[0007] When the above scheme is adopted, a small restoring spring is provided inside the fixed rotating rod to provide restoring force for the mechanism. Then the movable wheel frame rotates to the notch, the airbag is not squeezed and returns to its original state, pushing the clamping block to be squeezed to both sides, and the auxiliary support frame is squeezed outward by the movable slider and the squeezing push block. The auxiliary support frame drives the auxiliary push plate to move upward through the limit block frame. It is explained here that when the push clamping block is in the original state of the airbag, it is in a normally open state and a restoring spring is installed inside.

[0008] In a preferred embodiment, a valve body support mechanism is clamped on the outer side of the maintenance mechanism, a ball valve support mechanism is inserted on the outer side of the valve body support mechanism, and a sealing mechanism is provided on the inner side of the ball valve support mechanism.

[0009] By adopting the above solution, the overall structure is relatively simple.

[0010] In a preferred embodiment, the ball valve support mechanism includes a turbine box, the inner side of the turbine box is rotatably connected to a central rotating valve, the inner side of the central rotating valve is provided with an anti-slip tube, and the anti-slip tube of the central rotating valve is arranged in an anti-falling state with the turbine box.

[0011] With the above solution, the central rotating valve transmits pressure to the supporting push rod through the packing rack. According to the characteristics of the valve body structure, the internal pressure is generated, and the supporting push rod drives the movable wheel frame to deflect through the curved auxiliary push rod. If the internal structure of the mechanism is normal, the curved auxiliary push rod is subjected to the same pressure on both sides.

[0012] In a preferred embodiment, a stuffing rack is inserted into the inner side of the central rotary valve, a valve stem is clamped on both sides of the stuffing rack, and a limit block rack is rotatably connected to the outer side of the valve stem.

[0013] With the above solution, when the central rotary valve rotates, the packing rack squeezes the lower side, and the packing rack transmits the pressure to the sealing mechanism area through the valve stem. Then, the upper support tube and the lower support tube are in close contact, and the circular ring acts as a limiter for them. The support bar transmits the pressure to the wave spring.

[0014] In a preferred embodiment, the valve body supporting mechanism includes two side valve bodies, and the outer sides of the two side valve bodies are clamped with the middle valve body.

[0015] The above solution provides internal sealing.

[0016] In a preferred embodiment, the sealing mechanism includes a lower support tube, an upper support tube is inserted into the outer side of the lower support tube, a circular ring is provided on the inner side of the upper support tube, a wave spring is clamped on the side of the upper support tube away from the circular ring, a support bar is clamped on one side of the wave spring, and the upper support tube is clamped on the outer side of the limit block frame.

[0017] With the above solution, the wave spring provides the preload force F on the valve seat sealing surface. F Because the circular ring ensures that the medium in the inlet and outlet pipes cannot enter the inner cavity of the middle valve body through the gap between the valve seat and the valve body.

[0018] In a preferred embodiment, push clamps are provided on both sides of the airbag, and the push clamps are provided on the outside of the middle valve body. Support push rods are clamped on both sides of the curved auxiliary push rod.

[0019] By adopting the above solution, the auxiliary push plate drives the lubricating oil storage rack to squeeze the bottom end of the filler rack, and the internal lubricating oil is passed into the filler rack. When the central rotating valve returns to its original position, suction is generated inside due to the pressure difference, and the lubricating oil is sucked into the central rotating valve.

[0020] The technical effects and advantages of the present invention are as follows:

[0021] 1. Lubricating oil is sucked into the central rotating valve. At the same time, the tension of the pushing clamp and the restoring force of the fixed rotating rod cause the airbag to be in its original compressed state. It should be noted that when the pushing clamp is in the original state of the airbag, it is in a normal open state and a restoring spring is installed inside. This allows the lubricating oil to be automatically added through the transmission mechanism without the need for staff to open the valve. The overall operation is relatively simple and the maintenance efficiency is high.

[0022] 2. The wave spring provides the preload force F on the valve seat sealing surface. F Because the circular ring ensures that the medium in the inlet and outlet pipes cannot enter the inner cavity of the middle valve body through the gap between the valve seat and the valve body, the resulting force pushes the entire valve seat toward the ball, achieving the seal between the sealing surface and the ball, that is, realizing the DBB function. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the ball valve support mechanism of the present invention.

[0024] Figure 2 It is a structural schematic diagram of the maintenance mechanism of the present invention.

[0025] Figure 3 Schematic diagram of the structure of the wave spring of the present invention.

[0026] The accompanying drawings are marked as follows: 1. Ball valve support mechanism; 101. Turbine box; 102. Filling frame; 103. Central rotary valve; 104. Valve stem; 105. Limiting block frame; 2. Valve body support mechanism; 201. Middle valve body; 202. Both side valve bodies; 3. Maintenance mechanism; 301. Pushing block; 302. Support push rod; 303. Movable slider; 304. Limiting block frame; 305. Curved auxiliary push rod; 3 06. Lubricating oil storage rack; 307. Auxiliary push plate; 308. Torque spring rod; 309. Auxiliary support frame; 310. Extrusion push block; 311. Rotating gear valve frame; 312. Movable rotor frame; 313. Airbag; 314. Internal rotating gear frame; 315. Fixed rotating rod; 4. Sealing mechanism; 401. Wave spring; 402. Lower support tube; 403. Support bar; 404. Upper support tube; 405. Circular ring. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] Refer to the instruction manual Figure 1-2 In one embodiment of the present invention, a fluorine-lined fixed ball valve with DBB function includes a maintenance mechanism 3, which includes an airbag 313. The top of the airbag 313 is clamped with a movable wheel frame 312. The inner side of the movable wheel frame 312 is rotatably connected to an inner rotating gear frame 314. The inner side of the inner rotating gear frame 314 is rotatably connected to a gear valve frame 311. The inner side of the gear valve frame 311 is rotatably connected to a fixed rotating rod 315. Curved auxiliary rods are provided on both sides of the fixed rotating rod 315. The booster rod 305, the outer side of the curved auxiliary push rod 305 is clamped with an extrusion push block 310, one side of the extrusion push block 310 is clamped with a movable slider 303, the outer side of the movable slider 303 is clamped with an auxiliary support frame 309, the center of the auxiliary support frame 309 is provided with a torque spring rod 308, the top of the torque spring rod 308 is inserted into the limiting block frame 304, the top of the limiting block frame 304 is provided with an auxiliary push plate 307, and the top of the auxiliary push plate 307 is clamped with a lubricating oil storage frame 306.

[0029] It should be noted that the central rotary valve 103 transmits the pressure to the support push rod 302 through the stuffing rack 102. According to the characteristics of the valve body structure, the internal pressure is generated, and the support push rod 302 drives the movable wheel frame 312 to deflect through the curved auxiliary push rod 305. If the internal structure is normal, the curved auxiliary push rod 305 is subjected to the same pressure on both sides. If the structure is aged or the seal on one side is damaged, the two sides of the curved auxiliary push rod 305 are subjected to different forces. The curved auxiliary push rod 305 drives the movable wheel frame 312 to rotate through the inner rotating gear frame 314, and the inner rotating gear frame 314 drives the gear valve frame 311 to rotate through the fixed rotating rod 315. The fixed rotating rod 315 is provided with a small restoring spring inside to provide the restoring force of the mechanism. Then the movable wheel frame 312 rotates to the notch, and the airbag 313 is not squeezed and returns to its original shape, pushing the clamping block 301 to be squeezed and move to both sides. The movable slider 303 and the extrusion push block 310 squeeze the auxiliary support frame 309 to move outward, and the auxiliary support frame 309 drives the auxiliary push plate 307 to move upward through the limit block frame 304. The auxiliary push plate 307 drives the lubricating oil storage frame 306 to squeeze the bottom end of the filling frame 102, and the internal lubricating oil is passed into the filling frame 102. When the central rotating valve 103 returns to its original position, suction is generated due to the pressure difference inside, and the lubricating oil is sucked into the central rotating valve 103. At the same time, the tension of the pushing clamp 301 plus the restoring force of the fixed rotating rod 315 cause the airbag 313 to be in its original compressed state. It is explained here that when the pushing clamp 301 is in the original state of the airbag 313, it is in a normally open state, and a restoring spring is installed inside, so that it is automatically added through the transmission mechanism without the need for staff to open the valve. The overall operation is relatively simple and the maintenance efficiency is high.

[0030] Refer to the instruction manual Figure 2-3The outer side of the maintenance mechanism 3 of an embodiment of the present invention is clamped with a valve body support mechanism 2, the outer side of the valve body support mechanism 2 is plugged with a ball valve support mechanism 1, the inner side of the ball valve support mechanism 1 is provided with a sealing mechanism 4, the ball valve support mechanism 1 includes a turbine box 101, the inner side of the turbine box 101 is rotatably connected to a central rotary valve 103, the inner side of the central rotary valve 103 is provided with an anti-skid tube, the anti-skid tube of the central rotary valve 103 and the turbine box 101 are arranged in an anti-falling state, the inner side of the central rotary valve 103 is plugged with a stuffing rack 102, the two sides of the stuffing rack 102 are clamped with a valve stem 104, the outer side of the valve stem 104 is rotatably connected to a limit block rack 105, the valve body support The support mechanism 2 includes valve bodies 202 on both sides, and the outer sides of the valve bodies 202 on both sides are clamped with the middle valve body 201. The sealing mechanism 4 includes a lower support tube 402, and the outer side of the lower support tube 402 is inserted with an upper support tube 404. A circular ring 405 is provided on the inner side of the upper support tube 404. The side of the upper support tube 404 away from the circular ring 405 is clamped with a wave spring 401, and one side of the wave spring 401 is clamped with a support bar 403. The upper support tube 404 is clamped to the outer side of the limit block frame 105. Pushing blocks 301 are provided on both sides of the airbag 313. The pushing blocks 301 are provided on the outer side of the middle valve body 201, and supporting push rods 302 are clamped on both sides of the curved auxiliary push rod 305.

[0031] It should be noted that when the central rotary valve 103 rotates, it squeezes the lower side through the filler frame 102, and the filler frame 102 transmits pressure to the sealing mechanism 4 area through the valve stems 104 and 106. Then, the upper support tube 404 and the lower support tube 402 are in close contact, and the circular ring 405 acts as a limiter for them. The support bar 403 transmits the pressure to the wave spring 401.

[0032] The wave spring 401 provides the preload force F on the valve seat sealing surface. F Because the circular ring 405 ensures that the medium in the inlet and outlet pipes cannot enter the inner cavity of the valve body 201 through the gap between the valve seat and the valve body, a "piston" area A is formed between the outer diameter of the circular ring 405 and the sealing surface. Due to the existence of area A, the fluid in the pipeline generates a pressure difference F on the valve seat sealing surface. A ; Preload force F F and pressure difference F A , the resulting force F, where F = F F +F A Pushing the entire valve seat toward the ball realizes the sealing between the sealing surface and the ball, thus realizing the DBB function.

[0033] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense, and may refer to mechanical or electrical connections, internal communication between two components, or direct connection. "Up," "down," "left," and "right" are only used to indicate relative positional relationships. When the absolute positions of the objects being described change, the relative positional relationships may also change.

[0034] Secondly: The drawings of the embodiments disclosed in the present invention only involve structures related to the embodiments disclosed in the present invention. Other structures may refer to conventional designs. The same embodiment and different embodiments of the present invention may be combined with each other without conflict.

[0035] Finally: The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fluorine-lined fixed ball valve with DBB function, comprising a maintenance mechanism (3), characterized in that: The maintenance mechanism (3) includes an air bag (313), the top end of the air bag (313) is clamped with a movable wheel frame (312), the inner side of the movable wheel frame (312) is rotatably connected to an inner rotating gear frame (314), the inner side of the inner rotating gear frame (314) is rotatably connected to a gear valve frame (311), the inner side of the gear valve frame (311) is rotatably connected to a fixed rotating rod (315), and curved auxiliary push rods are provided on both sides of the fixed rotating rod (315). (305), the outer side of the curved auxiliary push rod (305) is clamped with an extrusion push block (310), one side of the extrusion push block (310) is clamped with a movable slider (303), the outer side of the movable slider (303) is clamped with an auxiliary support frame (309), a torque spring rod (308) is provided in the center of the auxiliary support frame (309), the top end of the torque spring rod (308) is plugged with a limit block frame (304), and the top end of the limit block frame (304) is provided An auxiliary push plate (307) is provided, the top end of the auxiliary push plate (307) is clamped with a lubricating oil storage rack (306), the outer side of the maintenance mechanism (3) is clamped with a valve body support mechanism (2), the outer side of the valve body support mechanism (2) is plugged with a ball valve support mechanism (1), the inner side of the ball valve support mechanism (1) is provided with a sealing mechanism (4), the sealing mechanism (4) includes a lower support tube (402), the outer side of the lower support tube (402) is plugged with an upper support tube (403), and the outer side of the lower support tube (403) is plugged with an upper support tube (404). 4), a circular ring (405) is provided on the inner side of the upper support tube (404), a wave spring (401) is clamped on the side of the upper support tube (404) away from the circular ring (405), a support bar (403) is clamped on one side of the wave spring (401), the upper support tube (404) is clamped on the outer side of the limit block frame (304), and the valve body support mechanism (2) includes two side valve bodies (202), and the outer sides of the two side valve bodies (202) are clamped with the middle valve body (201).

2. The fluorine-lined fixed ball valve with DBB function according to claim 1, characterized in that: The ball valve support mechanism (1) comprises a turbine box (101), the inner side of the turbine box (101) is rotatably connected to a central rotary valve (103), the inner side of the central rotary valve (103) is provided with an anti-slip pipe, and the anti-slip pipe of the central rotary valve (103) and the turbine box (101) are arranged in an anti-drop state.

3. The fluorine-lined fixed ball valve with DBB function according to claim 2, characterized in that: A stuffing rack (102) is inserted into the inner side of the central rotary valve (103), a valve stem (104) is clamped on both sides of the stuffing rack (102), and the outer side of the valve stem (104) is rotatably connected to a limit block rack (304).

4. The fluorine-lined fixed ball valve with DBB function according to claim 1, characterized in that: Pushing clamps (301) are provided on both sides of the air bag (313), and the pushing clamps (301) are provided on the outside of the middle valve body (201). Supporting push rods (302) are clamped on both sides of the curved auxiliary push rod (305).

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