Corrugated pipe stop valve special for phosgene

Abstract

The utility model relates to the technical field of stop valves, in particular to a corrugated pipe stop valve special for phosgene, which comprises a valve body, a fixing piece is fixed on the upper surface of the valve body, a connecting flange is fixed at the upper end of the fixing piece through a bolt, and two baffles are symmetrically fixed in the valve body. The left sides of the two baffles are both connected with movable gaskets, two movable plates are fixed to the left sides of the movable gaskets, guide rods fixed to the valve body penetrate through the interiors of the two movable plates, and the outer surfaces of the guide rods are sleeved with springs connected with the movable plates in an abutting mode. The tail end of the spring is connected with a limiting block in an abutting mode, wherein the limiting block and the guide rod are fixed. According to the utility model, through the arrangement of the baffle plate, when a medium suddenly enters the valve body, the movable gasket is pushed to move, the movable plate is driven to move, and the movable plate pushes the spring to compress, so that the impact force of the medium is absorbed, the impact force of the medium on the valve core is reduced, the service life of the valve core is prolonged, and the practicability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of stop valves, in particular to a bellows stop valve dedicated to phosgene. Background Art

[0002] Phosgene, with the chemical formula COCl2, is a colorless or slightly yellow gas with a strong pungent or suffocating odor. Phosgene is an important organic intermediate, a very active electrophilic reagent, and is easily hydrolyzed. A bellows is a pipe used to transport liquids and gases, formed by a series of corrugations. These waveforms allow the pipe to have higher elasticity when subjected to a certain pressure. The phosgene-specific bellows stop valve is mainly used to regulate the flow of media on the phosgene-liquid chlorine industrial pipeline of chemical companies in the chemical industry.

[0003] The patent specification with announcement number CN218625465U discloses a bellows stop valve, which includes a first fixed plate, which is fixed between a fixed ring and a valve cover connecting seat, and the first fixed plate protrudes outward toward the valve seat side to form a plurality of conical protrusions, and the free end of the conical protrusion is provided with a first through hole, and the middle part of the first fixed plate is also provided with a second through hole corresponding to the valve stem; it matches the connecting channel through the outer peripheral wall of the valve core, the bellows cavity is sealed to a great extent, the fluid entering the bellows cavity is reduced, and the possibility of physical damage to the bellows caused by impurities is reduced; the protrusion shape of the conical protrusion makes it more difficult for larger-sized impurities to transfer into the bellows cavity, while it is less difficult to transfer them out of the bellows cavity; the bellows cavity is designed with no dead angle to prevent particles from remaining in the bellows cavity, the bellows has a long service life, can be used in negative vacuum medium conditions, and has high product stability.

[0004] However, in the implementation of relevant technologies, it was found that the bellows stop valve of the above design has the following problems: in the bellows stop valve in the above technical solution, the outer peripheral wall of the valve core matches the connecting channel, the bellows cavity is sealed to a large extent, the fluid entering the bellows cavity is reduced, and the possibility of physical damage to the bellows caused by impurities is reduced. However, during the use of the stop valve, the valve core in the direction of the liquid inlet will be impacted by the medium, and the valve core will be easily damaged by the impact for a long time, affecting the normal use of the valve and reducing the service life of the valve. In view of this, a bellows stop valve dedicated to phosgene is provided to overcome the above defects. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and provides a bellows stop valve dedicated for phosgene.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a bellows stop valve dedicated to phosgene, comprising a valve body, a fixing piece is fixed on the upper surface of the valve body, a connecting flange is fixed to the upper end of the fixing piece by bolts, two baffles are symmetrically fixed inside the valve body, movable gaskets are connected to the left sides of the two baffles, two movable plates are fixed to the left sides of the movable gaskets, guide rods fixed to the valve body are passed through the inside of the two movable plates, a spring abutting against the movable plate is sleeved on the outer surface of the guide rod, and a limit block fixed to the guide rod is abutted against the end of the spring.

[0007] As a further description of the above technical solution: a threaded pipe is fixed to the upper end of the connecting flange, and the internal thread of the threaded pipe is connected to a screw rod. By rotating the screw rod and cooperating with the threaded pipe, the stop valve can be opened or closed.

[0008] As a further description of the above technical solution: a handle is fixed to the upper end of the screw rod by a bolt, and a transmission rod penetrating the inner wall of the valve body is fixed to the lower end of the screw rod, and the provided handle facilitates operation by the staff.

[0009] As a further description of the above technical solution: the end of the transmission rod is rotatably connected to the valve core through a bearing, both ends of the valve core are connected to fixed plates, and the ends of the fixed plates are fixed with positioning blocks, and the provided positioning blocks can play a limiting role.

[0010] As a further description of the above technical solution: a guide tube is fixed at one end of the valve core, and the inside of the guide tube is telescopically connected with a limit rod fixed to the valve body. Through the cooperation of the guide tube and the limit rod, a guiding role can be played to prevent the valve core from deviating.

[0011] As a further description of the above technical solution: a limit bearing is sleeved on the outer surface of the transmission rod, and the outer wall of the limit bearing is tightly fitted with the inner wall of the fixing part. The set limit bearing can ensure the stability of the transmission rod.

[0012] As a further description of the above technical solution: a sealing ring is fixed on the outer surface of the transmission rod and close to the lower end of the limit bearing, and the outer wall of the sealing ring is tightly fitted with the inner wall of the fixing part, and the sealing ring plays a sealing role.

[0013] The utility model has the following beneficial effects:

[0014] The utility model designs a bellows stop valve specially for phosgene. When a medium suddenly enters the valve body through a baffle plate, a movable gasket is pushed to move, which drives the movable plate to move. The movable plate pushes the spring to compress, thereby absorbing the impact force of the medium, reducing the impact force of the medium on the valve core, increasing the service life of the valve core, and improving practicality. By rotating the screw, the stop valve can be opened or closed in cooperation with the threaded pipe, and the arranged positioning block can play a role of limiting.

[0015] The utility model designs a bellows stop valve specially used for phosgene, which can play a guiding role through the cooperation of a guide tube and a limit rod to prevent the valve core from deviating. The set limit bearing can ensure the stability of the transmission rod, and the set sealing ring plays a sealing role. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 2 It is a schematic diagram of the cross-sectional structure of the valve body of the utility model;

[0018] Figure 3 It is a three-dimensional structural schematic diagram of the movable plate of the utility model;

[0019] Figure 4 It is a three-dimensional structural schematic diagram of the transmission rod of the utility model.

[0020] Legend:

[0021] 1. Valve body; 2. Fixing parts; 3. Connecting flange; 4. Baffle; 5. Movable gasket; 6. Movable plate; 7. Guide rod; 8. Spring; 9. Limit block; 10. Threaded pipe; 11. Screw; 12. Handle; 13. Transmission rod; 14. Valve core; 15. Fixing plate; 16. Positioning block; 17. Guide pipe; 18. Limit rod; 19. Limit bearing; 20. Sealing ring. DETAILED DESCRIPTION

[0022] Reference Figure 1-Figure 4The utility model provides a bellows stop valve for phosgene, comprising a valve body 1, a fixing member 2 being fixed on the upper surface of the valve body 1, a connecting flange 3 being fixed on the upper end of the fixing member 2 by bolts, two baffles 4 being symmetrically fixed inside the valve body 1, movable gaskets 5 being connected to the left sides of the two baffles 4, two movable plates 6 being fixed to the left sides of the movable gaskets 5, guide rods 7 fixed to the valve body 1 being penetrated inside the two movable plates 6, springs 8 being abutted and connected to the movable plates 6 on the outer surfaces of the guide rods 7, and limit blocks 9 being abutted and connected to the guide rods 7 on the end of the springs 8, when the medium suddenly enters the valve body 1 through the arranged baffles 4, the movable gasket 5 is pushed to move, driving the movable plates 6 to move, and the movable plates 6 push the springs 8 to be compressed, thereby absorbing the impact force of the medium, reducing the impact force of the medium on the valve core 14, improving the service life of the valve core 14, and improving the practicality.

[0023] As a further implementation scheme of the above technical scheme: a threaded pipe 10 is fixed to the upper end of the connecting flange 3, and the internal thread of the threaded pipe 10 is connected to a screw 11. By rotating the screw 11, with the cooperation of the threaded pipe 10, the stop valve can be opened or closed.

[0024] As a further implementation scheme of the above technical scheme: a handle 12 is fixed to the upper end of the screw rod 11 by bolts, and a transmission rod 13 penetrating the inner wall of the valve body 1 is fixed to the lower end of the screw rod 11. The handle 12 is provided to facilitate operation by the staff.

[0025] As a further implementation scheme of the above technical scheme: the end of the transmission rod 13 is rotatably connected to the valve core 14 through a bearing, both ends of the valve core 14 are connected to a fixed plate 15, and the end of the fixed plate 15 is fixed with a positioning block 16, and the set positioning block 16 can play a role of limiting.

[0026] In specific implementation, before using the phosgene-specific bellows stop valve, first connect the inlet and outlet flanges at both ends of the valve body 1 to the external pipes for use. When in use, by twisting the handle 12, the screw 11 is driven to rotate. With the cooperation of the threaded tube 10, the screw 11 moves vertically, thereby driving the transmission rod 13 to move, so that the valve core 14 and the two fixed plates 15 are separated, and the obstruction to the medium is released. At this time, the medium pushes the movable gasket 5 to move horizontally through the baffle plate 4, thereby entering the interior of the valve body 1, and is discharged to the left side through the two fixed plates 15. Moreover, through the set baffle plate 4, when the medium suddenly enters the valve body 1, it will push the movable gasket 5 to move, thereby driving the movable plate 6 to move, and through the limit block 9 on the guide rod 7, the movable plate 6 pushes the spring 8 to be compressed, thereby absorbing the impact force of the medium, reducing the impact force of the medium on the valve core 14, and prolonging the service life of the valve core 14. The practicality is improved.

[0027] As a further implementation scheme of the above technical scheme: a guide tube 17 is fixed to one end of the valve core 14, and the inside of the guide tube 17 is telescopically connected to a limit rod 18 fixed to the valve body 1. Through the cooperation of the guide tube 17 and the limit rod 18, a guiding role can be played to prevent the valve core 14 from deviating.

[0028] As a further implementation scheme of the above technical scheme: a limit bearing 19 is sleeved on the outer surface of the transmission rod 13, and the outer wall of the limit bearing 19 is tightly fitted with the inner wall of the fixing part 2. The set limit bearing 19 can ensure the stability of the transmission rod 13.

[0029] As a further implementation scheme of the above technical scheme: a sealing ring 20 is fixed on the outer surface of the transmission rod 13 and close to the lower end of the limit bearing 19, and the outer wall of the sealing ring 20 is tightly fitted with the inner wall of the fixing part 2, and the provided sealing ring 20 plays a sealing role.

[0030] During specific implementation, the upper half of the stop valve can be disassembled through the connecting flange 3 on the fixing part 2, which is convenient for maintenance. When closing the stop valve, the handle 12 is twisted in the opposite direction to drive the transmission rod 13 to move vertically, thereby driving the valve core 14 to reset. The set positioning block 16 can play a limiting role. With the cooperation of the guide tube 17 and the limit rod 18, it can play a guiding role to prevent the valve core 14 from deviating. The set limit bearing 19 can ensure the stability of the transmission rod 13, and the set sealing ring 20 plays a sealing role.

[0031] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A bellows stop valve for phosgene, comprising a valve body (1), a fixing member (2) being fixed to the upper surface of the valve body (1), a connecting flange (3) being fixed to the upper end of the fixing member (2) by bolts, characterized in that: Two baffles (4) are symmetrically fixed inside the valve body (1), and the left sides of the two baffles (4) are connected to movable gaskets (5). The left sides of the movable gaskets (5) are fixed to two movable plates (6), and the insides of the two movable plates (6) are penetrated by guide rods (7) fixed to the valve body (1). The outer surface of the guide rod (7) is sleeved with a spring (8) abutting against the movable plate (6), and the end of the spring (8) is abutting against a limit block (9) fixed to the guide rod (7). A threaded tube (10) is fixed to the upper end of the flange (3), the internal threads of the threaded tube (10) are connected to a screw rod (11), the upper end of the screw rod (11) is fixed to a handle (12) by means of a bolt, the lower end of the screw rod (11) is fixed to a transmission rod (13) penetrating the inner wall of the valve body (1), the end of the transmission rod (13) is rotatably connected to a valve core (14) by means of a bearing, both ends of the valve core (14) are connected to a fixing plate (15), and a positioning block (16) is fixed to each end of the fixing plate (15).

2. The bellows stop valve for phosgene according to claim 1, characterized in that: A guide tube (17) is fixed to one end of the valve core (14), and a limit rod (18) fixed to the valve body (1) is telescopically connected inside the guide tube (17).

3. The bellows stop valve for phosgene according to claim 1, characterized in that: The outer surface of the transmission rod (13) is sleeved with a limit bearing (19), and the outer wall of the limit bearing (19) is tightly fitted with the inner wall of the fixing member (2).

4. The bellows stop valve for phosgene according to claim 3, characterized in that: A sealing ring (20) is fixed on the outer surface of the transmission rod (13) and close to the lower end of the limit bearing (19), and the outer wall of the sealing ring (20) is tightly fitted with the inner wall of the fixing member (2).

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