A kind of anti-poison corrugated stop valve

Abstract

The utility model discloses an anti-toxic corrugated stop valve, comprising a valve body, wherein an inlet pipe and an outlet pipe are respectively arranged on both sides of the valve body, a valve stem and a valve disc are arranged in the valve body, a valve seat is arranged in the valve body, the inlet pipe is communicated with the valve seat through an inlet channel, the outlet pipe is communicated with the valve seat through an outlet channel, a bellows is sleeved on the valve stem, a mounting frame is arranged on the top of the valve body, the valve stem is rotatably connected with the mounting frame, a hand wheel is connected with the top of the valve stem, the valve disc comprises an abutting portion and an extending portion, the inlet channel is in a groove on the side wall below the valve seat, a spring and a movable block are arranged in the groove, one end of the movable block is connected with the spring, and the other end is elastically extended out of the groove to abut against the extending portion, a sealing gasket is arranged above one end of the movable block close to the extending portion, and a first inclined sealing gasket is arranged on the end face, and a plurality of tooth-shaped protrusions are arranged, and a clamping groove corresponding to the plurality of tooth-shaped protrusions is arranged on the side wall of the extending portion.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to an anti-poison corrugated stop valve. Background Art

[0002] The bellows stop valve is also called the bellows sealed stop valve. Through automatic rolling welding, a metal barrier is formed between the fluid medium and the atmosphere to ensure the zero leakage design of the valve stem. The bellows stop valve adopts a bellows structure inside. The lower end of the stainless steel bellows is welded to the valve stem to prevent the process fluid from corroding the valve stem. The other end is placed between the valve body and the valve cover to form a static seal. The double sealing design is adopted. If the bellows fails, the valve stem packing will also avoid leakage. The bellows is welded to the valve stem to maintain stable operating performance and avoid valve stem vibration caused by valve plug vibration. It will be used in pipelines with toxic media.

[0003] As a prior art, Chinese patent CN217633881U proposes a bellows stop valve, in which a valve disc and a valve seat are used to cooperate in sealing to achieve the stop, but it also has the following problems: the sealing structure is relatively simple, and during long-term use, the bellows may be deformed and damaged due to aging of the internal structure, and the valve disc may shake when impacted by the medium, resulting in a poor seal and the circulation or even leakage of toxic media inside the valve body, posing a certain threat to the life and health of the workshop and the operators. Utility Model Content

[0004] The utility model aims to provide a poison-proof corrugated stop valve to solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions: an anti-toxic corrugated stop valve, comprising a valve body, an inlet pipe and an outlet pipe are respectively arranged on both sides of the valve body, a valve stem and a valve disc are arranged in the valve body, a valve seat which can be sealed with the valve disc is arranged in the valve body, the inlet pipe is communicated with the valve seat through an inlet channel, the outlet pipe is communicated with the valve seat through an outlet channel, a bellows is sleeved on the valve stem, a mounting frame is arranged on the top of the valve body, the valve stem is rotatably connected with the mounting frame after extending upward, a hand wheel is connected to the top of the valve stem, and the valve disc comprises an abutting portion abutting with the valve seat and a valve seat provided on the abutting portion The lower extension part, the inlet channel is provided with a plurality of grooves along the circumferential direction on the lower side wall of the valve seat, a spring and a movable block are arranged in the groove, the movable block is slidably connected with the inner wall of the groove, one end of the movable block is connected with the spring, and the other end elastically extends out of the groove and abuts against the extension part, a sealing gasket is provided at one end of the movable block close to the abutting part and a first inclined surface is provided above, the first inclined surface is inclined upward toward the direction of the extension part, the end surface of the sealing gasket is arranged with a plurality of tooth-shaped protrusions, the side wall of the extension part is provided with a clamping groove corresponding to the plurality of tooth-shaped protrusions one by one, and the horizontal depth of the clamping groove is less than the horizontal width of the protrusion.

[0006] By adopting the above technical scheme, the valve stem is controlled to rotate and move downward by a handwheel, so that the valve disc moves downward, the abutting portion of the valve disc abuts against the valve seat, and at the same time, the extension portion abuts and slides against the first inclined surface of the movable block when moving downward, thereby pushing the movable block to shrink into the groove and squeezing the spring at the same time. The extension portion continues to move downward and is at the same horizontal position as the movable block. The spring resets to push the movable block out of the groove again and abuts against the extension portion. The raised portion on the sealing gasket is snapped into the clamping groove. The raised portion is made of rubber and deforms to fill the clamping groove, thereby generating friction between the movable block and the extension portion. Multiple movable blocks firmly press and fix the extension portion in the circumferential direction, thereby reducing the vibration of the valve disc, improving the sealing performance, and reducing the circulation or even leakage of toxic media.

[0007] As a further optimization of the utility model, a fin is further provided below one end of the movable block outside the groove, the side of the fin close to the extension portion is set as a plane, and the side away from the extension portion is provided with a second inclined surface, and the second inclined surface is inclined downward toward the direction of the extension portion.

[0008] With the above technical solution, when the medium enters the inlet channel from the inlet pipe and then moves upward toward the valve disc, the medium contacts the movable block and simultaneously pushes the second inclined surface of the fin under the movable block, so that the fin is pushed toward the extension part, thereby pressing the extension part tighter and more firmly.

[0009] As a further optimization of the utility model, the upper and lower connecting sections inside the bellows of the inlet channel are respectively filled with a first sealing ring and a second sealing ring, and the second sealing ring is axially slidably connected to the valve stem.

[0010] By adopting the above technical solution, sealing rings are set to seal both ends of the bellows. When the ends of the bellows are damaged due to aging, the medium is prevented from entering the bellows and leaking, thereby improving the sealing performance.

[0011] As a further optimization of the present invention, a receiving groove is provided on one side of the mounting frame, and an alarm component is provided in the receiving groove. The alarm component includes a toxic substance detector, a buzzer and a controller, and the toxic substance detector and the buzzer are both electrically connected to the controller.

[0012] By adopting the above technical solution, when toxic substances leak, the toxic substance detector detects that the toxic substance content in the environment exceeds the standard and sends a signal to the controller. The controller controls the buzzer to sound and promptly reminds the staff, thereby avoiding and eliminating safety hazards.

[0013] The beneficial effects of the utility model are as follows: the valve stem is controlled to rotate and move downward by a hand wheel, so that the valve disc moves downward, the abutting portion of the valve disc abuts against the valve seat, and at the same time, the extension portion abuts and slides against the first inclined surface of the movable block when moving downward, thereby pushing the movable block to shrink into the groove and squeezing the spring at the same time, so that the extension portion continues to move downward and is at the same horizontal position as the movable block, and the spring resets the movable block to push the movable block out of the groove again and abut against the extension portion, and the raised portion on the sealing gasket is clamped into the clamping groove. The raised portion is made of rubber and deforms to fill the clamping groove, thereby generating friction between the movable block and the extension portion, and multiple movable blocks firmly press and fix the extension portion in the circumferential direction, thereby reducing the vibration of the valve disc, improving the sealing performance, and reducing the circulation or even leakage of toxic media. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0015] Figure 2 for Figure 1 An enlarged schematic diagram of

[0016] Figure 3 for Figure 2 An enlarged schematic diagram of .

[0017] The meanings of the numbers in the figure are as follows: 1. valve body; 11. inlet pipe; 111. inlet channel; 12. outlet pipe; 121. outlet channel; 13. valve stem; 131. bellows; 14. mounting frame; 141. accommodating groove; 15. valve seat; 16. valve disc; 161. abutment portion; 162. extension portion; 1621. snap-on groove; 17. hand wheel; 2. groove; 21. spring; 22. movable block; 221. first inclined surface; 222. sealing gasket; 2221. raised portion; 223. fin; 2231. second inclined surface; 3. alarm assembly; 41. first sealing ring; 42. second sealing ring. DETAILED DESCRIPTION

[0018] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

[0019] Embodiment 1:

[0020] See attached Figure 1-3 The embodiment disclosed in the utility model is further provided with: an anti-poison bellows stop valve, comprising a valve body 1, an inlet pipe 11 and an outlet pipe 12 are respectively arranged on both sides of the valve body 1, a valve stem 13 and a valve flap 16 are arranged in the valve body 1, a valve seat 15 which can be sealed with the valve flap 16 is arranged in the valve body 1, the inlet pipe 11 is communicated with the valve seat 15 through an inlet channel 111, the outlet pipe 12 is communicated with the valve seat 15 through an outlet channel 121, a bellows 131 is sleeved on the valve stem 13, a mounting frame 14 is arranged on the top of the valve body 1, the valve stem 13 is rotatably connected with the mounting frame 14 after extending upward, a hand wheel 17 is connected to the top of the valve stem 13, and the valve flap 16 comprises an abutting portion 161 abutting with the valve seat 15 and an extending portion 16 arranged below the abutting portion 161 2. The inlet channel 111 is provided with a plurality of grooves 2 along the circumferential direction on the side wall below the valve seat 15. A spring 21 and a movable block 22 are provided in the groove 2. The movable block 22 is slidably connected to the inner wall of the groove 2. One end of the movable block 22 is connected to the spring 21, and the other end elastically extends out of the groove 2 to abut against the extension portion 162. A sealing gasket 222 is provided at one end of the movable block 22 close to the extension portion 162 and a first inclined surface 221 is provided above. The first inclined surface 221 is inclined upward in the direction of the extension portion 162. A plurality of tooth-shaped protrusions 2221 are arranged on the end surface of the sealing gasket 222. A clamping groove 1621 corresponding to the plurality of tooth-shaped protrusions is provided on the side wall of the extension portion 162. The horizontal depth of the clamping groove 1621 is less than the horizontal width of the protrusion 2221.

[0021] Furthermore, a fin 223 is provided below one end of the movable block 22 outside the groove 2 . The side of the fin 223 close to the extension portion 162 is set as a plane, and the side away from the extension portion 162 is provided with a second inclined surface 2231 sloping downward toward the extension portion 162 .

[0022] The principle of this embodiment is as follows: the valve stem 13 is controlled to rotate and move downward by the hand wheel 17, so that the valve disc 16 moves downward, the abutting portion 161 of the valve disc 16 abuts against the valve seat 15, and at the same time, the extension portion 162 abuts and slides against the first inclined surface 221 of the movable block 22 when moving downward, thereby pushing the movable block 22 to shrink into the groove 2, and at the same time squeezing the spring 21, the extension portion 162 continues to move downward to be at the same horizontal position as the movable block 22, and the spring 21 is reset to push the movable block 22 out of the groove 2 again to abut against the extension portion 162, and the protrusion 2221 on the sealing gasket 222 is clamped into the clamping groove 1621. The protrusion 2221 is made of rubber material and deforms to fill the clamping groove 1621, so that friction is generated between the movable block 22 and the extension portion 162, and multiple movable blocks 22 firmly press and fix the extension portion 162 in the circumferential direction, thereby reducing the vibration of the valve disc 16, improving the sealing performance, and reducing the circulation or even leakage of toxic media;

[0023] When the medium enters the inlet channel 111 from the inlet pipe 11 and then moves upward toward the valve disc 16, the medium contacts the movable block 22, and the medium simultaneously pushes the second inclined surface 2231 of the fin 223 below the movable block 22, so that the fin 223 is pushed toward the extension portion 162, thereby pressing the extension portion 162 tighter and more firmly.

[0024] Embodiment 2:

[0025] See attached Figure 2-3 In this embodiment, the inlet channel 111 and the upper and lower connecting sections inside the bellows 131 are respectively filled with a first sealing ring 41 and a second sealing ring 42 , and the second sealing ring 42 is axially slidably connected to the valve stem 13 .

[0026] The principle of this embodiment is: sealing rings are provided to seal both ends of the bellows 131. When the ends of the bellows 131 are damaged due to aging, the medium is prevented from entering the bellows 131 and leaking, thereby improving the sealing performance.

[0027] Embodiment three:

[0028] See attached Figure 1 A receiving groove 141 is provided on one side of the mounting frame, and an alarm component 3 is provided in the receiving groove 141. The alarm component 3 includes a toxic substance detector, a buzzer and a controller. The toxic substance detector and the buzzer are electrically connected to the controller.

[0029] The principle of this embodiment is: when toxic substances leak, the toxic substance detector detects that the toxic substance content in the environment exceeds the standard and sends a signal to the controller. The controller controls the buzzer to sound and promptly reminds the staff, thereby avoiding and eliminating safety hazards.

[0030] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications of the above assumptions should also be regarded as the protection scope of the present invention.

Claims

1. A poison-proof bellows stop valve, comprising a valve body (1), wherein an inlet pipe (11) and an outlet pipe (12) are respectively arranged on both sides of the valve body (1), a valve stem (13) and a valve flap (16) are arranged in the valve body (1), a valve seat (15) capable of sealing with the valve flap (16) is arranged in the valve body (1), the inlet pipe (11) and the valve seat (15) are communicated through an inlet channel (111), the outlet pipe (12) and the valve seat (15) are communicated through an outlet channel (121), a bellows (131) is sleeved on the valve stem (13), a mounting frame (14) is arranged on the top of the valve body (1), the valve stem (13) is rotatably connected to the mounting frame (14) after extending upward, and a hand wheel (17) is connected to the top of the valve stem (13), characterized in that: The valve flap (16) comprises an abutting portion (161) abutting against the valve seat (15) and an extending portion (162) arranged below the abutting portion (161); the inlet channel (111) is provided with a plurality of grooves (2) along the circumferential direction on the side wall below the valve seat (15); a spring (21) and a movable block (22) are arranged in the groove (2); the movable block (22) is slidably connected to the inner wall of the groove (2); one end of the movable block (22) is connected to the spring (21), and the other end is elastically extended. The outer side of the groove (2) is in contact with the extension part (162); a sealing gasket (222) is provided at one end of the movable block (22) close to the extension part (162) and a first inclined surface (221) is provided on the upper side; a plurality of tooth-shaped protrusions (2221) are arranged on the end surface of the sealing gasket (222); a side wall of the extension part (162) is provided with a clamping groove (1621) corresponding to the plurality of tooth-shaped protrusions one by one; and a horizontal depth of the clamping groove (1621) is less than a horizontal width of the protrusion (2221).

2. The anti-poison bellows stop valve according to claim 1, characterized in that: A fin (223) is further provided below one end of the movable block (22) outside the groove (2); the side of the fin (223) close to the extension portion (162) is arranged as a plane, and the side away from the extension portion (162) is arranged as a second inclined surface (2231).

3. The anti-poison bellows stop valve according to claim 1 or 2, characterized in that: The inlet channel (111) and the internal upper and lower connecting sections of the bellows (131) are respectively filled with a first sealing ring (41) and a second sealing ring (42), and the second sealing ring (42) is axially slidably connected to the valve stem (13).

4. The anti-poison bellows stop valve according to claim 1 or 2, characterized in that: A receiving groove (141) is provided on one side of the mounting frame (14), and an alarm component (3) is provided in the receiving groove (141). The alarm component (3) comprises a toxic substance detector, a buzzer and a controller, and the toxic substance detector and the buzzer are both electrically connected to the controller.

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