Downward-expanding corrugated pipe sealing kettle bottom valve

Abstract

The utility model discloses a downward expanding type corrugated pipe sealing kettle bottom valve which comprises a valve body, a movable cavity is formed in the valve body, a valve rod is connected to the valve body in a sliding mode, the valve rod comprises a movable part arranged in the movable cavity, a corrugated pipe assembly is connected to the movable part in a sleeved mode, one end of the corrugated pipe assembly is fixedly arranged, and the other end of the corrugated pipe assembly is fixedly connected with a valve rod. And the other end moves synchronously with the moving part. The utility model provides a downward expansion type corrugated pipe sealing kettle bottom valve, which can isolate a medium from being adhered to a valve rod, ensure smooth movement of the valve rod, protect the valve rod and avoid leakage of the valve at the same time, medium separation is carried out on the outside of the valve rod through a corrugated pipe assembly, and the possibility that the medium invades into a gap between the valve rod and a valve body is avoided. The equipment operation quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of kettle bottom valves, in particular to a downward-expanding bellows-sealed kettle bottom valve. Background Art

[0002] The kettle bottom valve is a valve made of titanium as the main material installed at the bottom of the reaction kettle, storage tank and other containers for discharging. It eliminates the residual phenomenon of process media usually at the outlet of the container and realizes the function of emptying and draining. The kettle bottom valve is composed of a valve body, a valve core, a valve stem, a valve seat, a sealing ring, an actuator (electric, pneumatic), etc. Its principle is to push the valve disc up or down through the valve stem to achieve the purpose of opening and closing. The upward expansion tank bottom valve is that the valve stem rises and the valve opens; the downward expansion tank bottom valve is that the valve stem rises and the valve closes.

[0003] For example, the announcement number "CN219062443U" discloses "a wear-resistant component for a reactor bottom valve", including a valve body, the top of the valve body is fixedly connected to the valve seat body by screws, the top of the valve seat body is fixedly connected to the valve seat pressure plate by screws, the top of the valve seat pressure plate is fixedly connected to the valve seat pressure sleeve by screws, the bottom of the valve seat is fixedly connected to the bracket by screws, one side of the bracket is fixedly connected to the side-mounted handwheel by screws, and the bottom of the bracket is installed with a cylinder assembly. However, in actual applications, when the working conditions are special media, such as high-viscosity syrup, the general reactor bottom valve will produce the phenomenon of the medium adhering to the valve stem, affecting the opening and closing process, and at the same time affecting the sealing effect. Utility Model Content

[0004] In view of the problem in the prior art mentioned in the background technology that the presence of high-viscosity media will affect the opening and closing and sealing effects, the utility model provides a downward-expanding bellows-sealed kettle bottom valve, which can isolate the valve stem from adhering media, ensure smooth movement of the valve stem, protect the valve stem and avoid valve leakage.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions.

[0006] A downward-expanding bellows-sealed kettle bottom valve comprises a valve body, a movable cavity is arranged in the valve body, a valve stem is slidably connected to the valve body, the valve stem comprises a moving part arranged in the movable cavity, a bellows assembly is sleeved on the moving part, one end of the bellows assembly is fixedly arranged, and the other end moves synchronously with the moving part. In the present application, a bellows assembly is provided on the valve stem. Due to the stretchable and compressible properties of the bellows assembly, the bellows assembly can be driven to expand and contract during the movement of the valve stem. Since the bellows assembly is sleeved on the outside of the valve stem, the medium will not directly contact the valve stem. Since the bellows assembly has good elasticity and one end of the bellows assembly is fixed and the other end moves relative to each other, the bellows assembly itself will not produce a relatively sliding interface between the valve stem and the valve body. Therefore, the medium will not interfere with the expansion and contraction of the bellows assembly, thereby avoiding the medium from entering the relatively sliding part between the valve stem and the valve body, and avoiding the adhesion of the medium from interfering with the relative movement between the valve stem and the valve body. At the same time, since the medium will not invade between the valve stem and the valve body, the sealing of the valve stem can be guaranteed, and the bellows assembly is used to block the medium on the outside of the valve stem, thereby isolating the possibility of the medium invading the gap between the valve stem and the valve body, thereby improving the operation quality of the equipment.

[0007] Preferably, the valve stem is connected with a valve core assembly, and the bellows assembly is fixedly arranged at a side away from the valve core assembly. The valve core assembly connected to the valve stem can produce a sealing effect, and the valve core assembly moves under the drive of the valve stem, thereby controlling the opening and closing functions of the kettle bottom valve. The bellows assembly is fixedly arranged at a side away from the valve core assembly, thereby ensuring the flexibility of the bellows and avoiding interference between the bellows and the valve core assembly during movement.

[0008] Preferably, the bellows assembly comprises a bellows body, and end blocks are connected to both ends of the bellows body. The bellows assembly comprises a bellows body, wherein both ends of the bellows body are provided with end blocks, which can realize the connection with the valve stem and play a fixing role to ensure the smoothness of the bellows body's expansion and contraction.

[0009] Preferably, the valve body is connected with a connecting pipe, and the bellows assembly includes a fixing seat arranged between the valve body and the connecting pipe. The valve body is connected with a connecting pipe, wherein the connecting pipe is arranged on the side of the valve body away from the valve core assembly, and the connecting pipe can realize the connection between the valve body and the execution structure, and a fixing seat is arranged between the connecting pipe and the valve body, wherein the fixing seat is a component of the bellows assembly, and the fixing seat belongs to the end block. The fixing seat arranged between the valve body and the connecting pipe can ensure the fixing effect, and at the same time, because the fixing seat is arranged between the valve body and the connecting pipe, the spatial integrity inside the active cavity can be ensured, and the interference between the valve stem and the bellows body during the movement of the valve stem can be avoided, and it can be easy to install.

[0010] Preferably, the valve body is provided with a placement groove on one side close to the connecting pipe, the fixing seat includes a seat plate, the seat plate is connected to the placement groove, and the connecting pipe is provided with a connecting protrusion on one side close to the valve body. The valve body is provided with a placement groove, wherein the placement groove can be embedded in the seat plate, thereby ensuring the stability of the fixing seat, and a connecting protrusion is provided on one side of the connecting pipe close to the valve body, the connecting protrusion abuts the seat plate, and the seat plate is sandwich-connected between the valve body and the connecting pipe, thereby ensuring the stability of the fixing seat.

[0011] Preferably, the fixing seat includes a connecting sleeve, the valve body includes an inner cavity side wall, the connecting sleeve is sleeved with the valve stem, and the junction between the connecting sleeve and the bellows body is flush with the inner cavity side wall. The fixing seat includes a connecting sleeve, the connecting sleeve is sleeved on the valve stem, wherein the connecting sleeve is arranged between the valve body and the valve stem, further ensuring the connection stability of the fixing seat, and at the same time, the junction between the connecting sleeve and the bellows body is flush with the side wall of the active cavity, thereby ensuring that the bellows assembly will not transport the adhesive medium between the valve body and the valve stem during movement, and ensuring the flatness of the inside of the active cavity.

[0012] Preferably, the bellows body is sealed and connected to the end block, thereby preventing the medium from penetrating and interfering with the movement of the valve stem, thereby ensuring the smooth movement of the valve stem.

[0013] Preferably, a guide sleeve is provided in the connecting pipe, and the guide sleeve is sleeved with the valve stem. A guide sleeve is provided in the connecting pipe, and the guide sleeve is connected with the valve stem to ensure the smoothness of the movement of the valve stem and play a role in guiding the movement.

[0014] Preferably, the connecting pipe is connected to a packing on the side away from the valve body, and the packing is arranged between the connecting pipe and the valve stem. The connecting pipe is provided with a packing, and the sealing between the connecting pipe and the valve stem is ensured by the packing.

[0015] Preferably, the packing is connected to a pressure plate assembly on the side away from the valve body, and the pressure plate assembly is connected to the pipe and abuts the packing. The pipe is connected to a pressure plate assembly on the side away from the valve body, wherein the pressure plate assembly includes a packing gland and a packing pressure plate, wherein the packing gland abuts the packing, and the packing pressure plate is arranged on the side of the packing gland away from the valve body and connected to the pipe, thereby ensuring the extrusion force on the packing gland and the packing, and further ensuring the sealing performance.

[0016] The beneficial effects of the utility model are as follows:

[0017] It can isolate the contact between the medium and the valve stem, ensuring the smooth movement of the valve stem;

[0018] It can improve the sealing performance of the kettle bottom valve and avoid leakage;

[0019] The stability of the bellows assembly can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model.

[0021] Figure 2 yes Figure 1 Schematic diagram of the structure of the bellows assembly.

[0022] Figure 3 yes Figure 1 A partial enlarged view of point A in the middle.

[0023] Figure 4 yes Figure 1 Schematic diagram of the structure of the medium voltage plate assembly.

[0024] In the figure:

[0025] 1 valve body, 11 placement groove, 12 inner cavity side wall, 13 valve seat;

[0026] 2 active cavity;

[0027] 3 valve stem, 31 moving part;

[0028] 4 bellows assembly, 41 bellows body, 42 end block, 43 fixing seat, 431 seat plate, 432 connecting sleeve;

[0029] 5. Valve core assembly;

[0030] 6 connecting pipe, 61 connecting protrusion, 62 guide sleeve;

[0031] 7. Filling;

[0032] 8 pressure plate assembly, 81 packing gland, 82 packing pressure plate;

[0033] 9 driving mechanism. DETAILED DESCRIPTION

[0034] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0035] Embodiment 1:

[0036] like Figure 1As shown, a downward-expanding bellows-sealed kettle bottom valve includes a valve body 1, an active cavity 2 is arranged in the valve body 1, a valve stem 3 is slidably connected to the valve body 1, the valve stem 3 includes a moving part 31 arranged in the active cavity 2, a bellows assembly 4 is sleeved on the moving part 31, one end of the bellows assembly 4 is fixedly arranged, and the other end moves synchronously with the moving part 31. In the present application, a bellows assembly 4 is provided on the valve stem 3. Due to the tensile and compressible properties of the bellows assembly 4, the bellows assembly 4 can be driven to expand and contract during the movement of the valve stem 3. Since the bellows assembly 4 is sleeved on the outside of the valve stem 3, the medium will not directly contact the valve stem 3. Since the bellows assembly 4 has good elasticity and one end of the bellows assembly 4 is fixed and the other end moves relatively, the bellows assembly 4 itself will not produce a relatively sliding junction between the valve stem 3 and the valve body 1. Therefore, the medium will not interfere with the expansion and contraction of the bellows assembly 4, and the medium is prevented from entering the relatively sliding part between the valve stem 3 and the valve body 1, and the viscosity of the medium is prevented from interfering with the relative movement between the valve stem 3 and the valve body 1. At the same time, since the medium will not invade between the valve stem 3 and the valve body 1, the sealing of the valve stem 3 can be guaranteed, and the bellows assembly 4 is used to block the medium on the outside of the valve stem 3, isolating the possibility of the medium invading the gap between the valve stem 3 and the valve body 1, thereby improving the operation quality of the equipment.

[0037] The assembly and working process of the downward-expanding bellows-sealed kettle bottom valve in this embodiment are as follows: In this embodiment, a valve body 1 is provided, and an active cavity 2 is provided inside the valve body 1. The valve stem 3 is slidably connected to the valve body 1 and moves inside the active cavity 2. The part of the valve stem 3 that moves in the active cavity 2 is the moving part 31 of the valve stem 3, wherein a bellows assembly 4 is connected to the valve stem 3, and the bellows assembly 4 covers the moving part 31 of the valve stem 3. During operation, when the valve stem 3 moves, it will drive the bellows assembly 4 to stretch and compress, and the bellows assembly 4 will isolate the contact between the valve stem 3 and the medium, thereby avoiding the medium from adhering to the valve stem 3 and causing the valve to jam when it is opened or closed. At the same time, it also avoids the medium from adhering to the valve stem 3. As the valve is opened and closed, the medium is carried out of the valve along the valve stem 3 through the packing 7. As the number of openings is frequent, the valve leaks.

[0038] Embodiment 2:

[0039] like Figure 1 , 2As shown, a downward-expanding bellows-sealed kettle bottom valve includes a valve body 1, an active cavity 2 is arranged in the valve body 1, a valve stem 3 is slidably connected to the valve body 1, the valve stem 3 includes a moving part 31 arranged in the active cavity 2, a bellows assembly 4 is sleeved on the moving part 31, one end of the bellows assembly 4 is fixedly arranged, and the other end moves synchronously with the moving part 31, a valve core assembly 5 is connected to the valve stem 3, the bellows assembly 4 is fixedly arranged at one side away from the valve core assembly 5, the bellows assembly 4 includes a bellows body 41, and end blocks 42 are connected to both ends of the bellows body.

[0040] In this embodiment, a bellows assembly 4 is provided on the valve stem 3. Due to the tensile and compressible properties of the bellows assembly 4, the bellows assembly 4 can be driven to expand and contract during the movement of the valve stem 3. Since the bellows assembly 4 is sleeved on the outside of the valve stem 3, the medium will not directly contact the valve stem 3. Since the bellows assembly 4 has good elasticity and one end of the bellows assembly 4 is fixed while the other end moves relatively, the bellows assembly 4 itself will not produce a relatively sliding interface between the valve stem 3 and the valve body 1. Therefore, the medium will not interfere with the expansion and contraction of the bellows assembly 4, thereby preventing the medium from entering the relatively sliding portion between the valve stem 3 and the valve body 1, and preventing the viscosity of the medium from interfering with the relative movement between the valve stem 3 and the valve body 1. At the same time, since the medium will not invade between the valve stem 3 and the valve body 1, the valve can be guaranteed. The sealing at the stem 3 is good, and the outside of the valve stem 3 is blocked by the bellows assembly 4 for medium, which isolates the possibility of medium invading the gap between the valve stem 3 and the valve body 1, improves the operation quality of the equipment, and the valve core assembly 5 connected to the valve stem 3 can produce a sealing effect. The valve core assembly 5 moves under the drive of the valve stem 3, thereby controlling the opening and closing functions of the kettle bottom valve. The bellows assembly 4 is fixed away from the side of the valve core assembly 5, so as to ensure the flexibility of the bellows and avoid interference between the bellows and the valve core assembly 5 during movement. The bellows assembly 4 includes a bellows body 41, wherein end blocks 42 are arranged at both ends of the bellows body 41, and the end blocks 42 can be connected to the valve stem 3 and play a fixing role to ensure the smoothness of the expansion and contraction of the bellows body 41.

[0041] like Figure 1 , 2 As shown in , 3, the valve body 1 is connected with the connecting pipe 6, the bellows assembly 4 includes a fixing seat 43 arranged between the valve body 1 and the connecting pipe 6, the valve body 1 is provided with a placement groove 11 on the side close to the connecting pipe 6, the fixing seat 43 includes a seat plate 431, the seat plate 431 is connected to the placement groove 11, the connecting pipe 6 is provided with a connecting protrusion 61 on the side close to the valve body 1, the fixing seat 43 includes a connecting sleeve 432, the valve body 1 includes an inner cavity side wall 12, the connecting sleeve 432 is sleeved on the valve stem 3, and the junction between the connecting sleeve 432 and the bellows body 41 is flush with the inner cavity side wall 12.

[0042] The valve body 1 is connected with a connecting pipe 6, wherein the connecting pipe 6 is arranged on a side of the valve body 1 away from the valve core assembly 5, and the connecting pipe 6 can realize the connection between the valve body 1 and the execution structure, and a fixing seat 43 is arranged between the connecting pipe 6 and the valve body 1, wherein the fixing seat 43 is a component of the bellows assembly 4, and the fixing seat 43 belongs to the end block 42. The fixing seat 43 arranged between the valve body 1 and the connecting pipe 6 can ensure the fixing effect. At the same time, since the fixing seat 43 is arranged between the valve body 1 and the connecting pipe 6, the spatial integrity inside the active cavity 2 can be ensured, and the interference between the valve stem 3 and the bellows body 41 during the movement of the valve stem 3 can be avoided. At the same time, it can be easy to install. A placement groove 11 is arranged on the valve body 1, wherein the placement groove 11 can be embedded in the seat plate 431, so as to ensure The stability of the fixed seat 43 is ensured, and a connecting protrusion 61 is provided on the side of the connecting pipe 6 close to the valve body 1, the connecting protrusion 61 abuts against the seat plate 431, and the seat plate 431 is sandwiched between the valve body 1 and the connecting pipe 6, thereby ensuring the stability of the fixed seat 43, the fixed seat 43 includes a connecting sleeve 432, and the connecting sleeve 432 is sleeved on the valve stem 3, wherein the connecting sleeve 432 is provided between the valve body 1 and the valve stem 3, further ensuring the connection stability of the fixed seat 43, and at the same time, the junction of the connecting sleeve 432 and the bellows body 41 is flush with the side wall of the active cavity 2, thereby ensuring that the bellows assembly 4 will not transport the adhesive medium to between the valve body 1 and the valve stem 3 during the movement, and can ensure the flatness of the inside of the active cavity 2.

[0043] The bellows body is sealed and connected to the end block 42. The bellows body is sealed and connected to the end block 42, thereby preventing the medium from penetrating and interfering with the movement of the valve stem 3, thereby ensuring the smooth movement of the valve stem 3.

[0044] like Figure 3 , 4 As shown, a guide sleeve 62 is provided in the connecting pipe 6, and the guide sleeve 62 is sleeved with the valve stem 3. A packing 7 is connected to the side of the connecting pipe 6 away from the valve body 1. The packing 7 is arranged between the connecting pipe 6 and the valve stem 3. A pressure plate assembly 8 is connected to the side of the packing 7 away from the valve body 1. The pressure plate assembly 8 is connected to the connecting pipe 6 and abuts against the packing 7.

[0045] A guide sleeve 62 is provided in the connecting pipe 6, which is connected to the valve stem 3 through the guide sleeve 62 to ensure the smoothness of the movement of the valve stem 3 and play a role in guiding the movement. A packing 7 is provided on the connecting pipe 6 to ensure the sealing between the connecting pipe 6 and the valve stem 3 through the packing 7. A pressure plate assembly 8 is connected to the side of the connecting pipe 6 away from the valve body 1, wherein the pressure plate assembly 8 includes a packing sleeve 81 and a packing pressure plate 82, wherein the packing sleeve 81 abuts the packing 7, and the packing pressure plate 82 is arranged on the side of the packing sleeve 81 away from the valve body 1 and connected to the connecting pipe 6, thereby ensuring the extrusion force on the packing sleeve 81 and the packing 7, thereby ensuring the sealing performance.

[0046] The assembly and working process of the downward-expanding bellows-sealed kettle bottom valve in this embodiment are as follows: In this embodiment, the kettle bottom valve includes a valve body 1, wherein a valve seat 3 is provided at the end of the valve body 1, an opening is provided on the valve seat 3, and a valve core component 5 is abutted at the opening. In this embodiment, the downward-expanding kettle bottom valve is not provided, and the valve core component 5 is provided inside the active cavity 2, and moves accordingly with the valve stem 3. When the valve core component 5 abuts on the opening, the kettle bottom valve is in a closed state. When the valve core component 5 moves away from the opening, the kettle bottom valve is opened. A bellows component 4 is sleeved on the valve stem 3, and the bellows component 4 The bellows assembly 4 includes a bellows body 41, and end blocks 42 are respectively arranged at both ends of the bellows body 41, wherein the end block 42 arranged at the side of the bellows assembly 4 away from the opening is a fixed seat 43, and the fixed seat 43 includes a seat plate 431 and a connecting sleeve 432, wherein the connecting sleeve 432 is sleeved with the valve stem 3, and the connecting sleeve 432 is connected to the bellows body 41 near the opening, wherein the connecting portion of the connecting sleeve 432 and the bellows body 41 is flush with the inner cavity side wall 12 arranged inside the valve body 1, wherein the valve body 1 is provided with a placement groove 11, which can be embedded with the seat plate 431. A connecting pipe 6 is also connected to the side of the valve body 1 away from the valve core assembly 5, wherein the connecting pipe 6 is provided with a connecting protrusion 61, which is also embedded with the placement groove 11, and the connecting protrusion 61 and the valve body 1 sandwich the seat plate 431 in the middle, thereby ensuring the stability of the connection. The other end of the bellows assembly 4 is also provided with an end block 42, which moves synchronously with the movement of the valve stem 3, and the fixed seat 43 remains fixed during the movement of the valve stem 3. A guide sleeve is provided on the connecting pipe 6 62, the guide sleeve 62 is sleeved on the valve stem 3 to achieve a guiding function, wherein a packing 7 is arranged on the side of the guide sleeve 62 away from the valve body 1, wherein the packing 7 is arranged around a circle of the valve stem 3, and a pressure plate assembly 8 is abutted on the side of the packing 7 away from the guide sleeve 62, and the pressure plate assembly 8 is connected to the side of the connecting pipe 6 away from the valve body 1, and is connected by bolts, so as to generate an extrusion force along the axial direction of the valve stem 3, and then squeeze the packing 7, so as to ensure the sealing between the packing 7 and the valve stem 3, and then a driving mechanism 9 is connected to the side of the connecting pipe 6 away from the valve body 1, so as to drive the movement of the valve stem 3.

Claims

1. A downward-expanding bellows-sealed kettle bottom valve, characterized in that: The invention comprises a valve body (1), wherein an active cavity (2) is arranged in the valve body (1), a valve stem (3) is slidably connected to the valve body (1), the valve stem (3) comprises a movable portion (31) arranged in the active cavity (2), a bellows assembly (4) is sleeved on the movable portion (31), one end of the bellows assembly (4) is fixedly arranged, and the other end moves synchronously with the movable portion (31); the valve body (1) is connected to a connecting pipe (6), the bellows assembly (4) comprises a fixing seat (43) arranged between the valve body (1) and the connecting pipe (6); a placement groove (11) is arranged on a side of the valve body (1) close to the connecting pipe (6), the fixing seat (43) comprises a seat plate (431), the seat plate (431) is connected to the placement groove (11), and a connecting protrusion (61) is arranged on a side of the connecting pipe (6) close to the valve body (1).

2. According to the downward expansion type bellows sealed kettle bottom valve as described in claim 1, it is characterized in that: The valve stem (3) is connected to a valve core assembly (5), and the bellows assembly (4) is fixedly arranged on a side away from the valve core assembly (5).

3. The downward-expanding bellows-sealed kettle bottom valve according to claim 1, characterized in that: The bellows assembly (4) comprises a bellows body (41), and both ends of the bellows body (41) are connected to end blocks (42).

4. The downward-expanding bellows-sealed kettle bottom valve according to claim 1, characterized in that: The fixing seat (43) includes a connecting sleeve (432), the valve body (1) includes an inner cavity side wall (12), the connecting sleeve (432) is sleeved on the valve stem (3), and the junction between the connecting sleeve (432) and the bellows body (41) is flush with the inner cavity side wall (12).

5. The downward-expanding bellows-sealed kettle bottom valve according to claim 3, characterized in that: The bellows body (41) and the end block (42) are sealedly connected.

6. A downward-expanding bellows-sealed kettle bottom valve according to any one of claims 1 to 4, characterized in that: A guide sleeve (62) is provided in the connecting pipe (6), and the guide sleeve (62) is sleeved on the valve stem (3).

7. A downward-expanding bellows-sealed kettle bottom valve according to any one of claims 1 to 4, characterized in that: A filler (7) is connected to the side of the connecting pipe (6) away from the valve body (1), and the filler (7) is arranged between the connecting pipe (6) and the valve stem (3).

8. The downward-expanding bellows-sealed kettle bottom valve according to claim 7, characterized in that: A pressure plate assembly (8) is connected to the side of the packing (7) away from the valve body (1), and the pressure plate assembly (8) is connected to the connecting pipe (6) and abuts against the packing (7).

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