Corrugated pipe sealing upward expanding type emptying valve

Abstract

The utility model discloses a corrugated pipe sealing upward expanding type emptying valve, and relates to the technical field of emptying valves, the corrugated pipe sealing upward expanding type emptying valve comprises a valve body assembly, a heat preservation sleeve, a valve clack assembly, a valve cover assembly, a packing sealing layer, a valve rod assembly, a support and a driving device; wherein the valve body assembly is sleeved with a heat preservation sleeve, the valve deck assembly is arranged at one end of the valve body assembly, a filler sealing layer is arranged on the inner wall of the valve deck assembly, the valve rod assembly is slidably arranged in the valve deck assembly and the valve body assembly, one end of the valve rod assembly is connected with the valve clack assembly, and the other end of the valve rod assembly is connected with the driving device; the end, away from the valve body assembly, of the valve deck assembly is connected with a driving device through a support. The sealing structure is of a double-sealing structure, primary sealing leakage prevention is achieved through the filler sealing layer, secondary sealing leakage prevention is achieved through the corrugated pipe, and the sealing structure can still keep an efficient sealing state after primary sealing leakage prevention fails.

Description

Technical Field

[0001] This utility model relates to the field of discharge valve technology, specifically to a bellows-sealed top-mounted discharge valve. Background Technology

[0002] Top-mounted discharge valves are core components of reactor equipment, widely used in chemical, pharmaceutical, food, metallurgical, and fine chemical industries. They primarily enable precise unloading, shut-off, and sealing control of media within reactors, storage tanks, and other containers, adapting to conditions involving solid-liquid mixtures, viscous media, and media containing small particles. Compared to traditional bottom-mounted discharge valves, top-mounted discharge valves employ an upward-extending valve stem opening and closing structure, ensuring the discharge channel is open and avoiding the problems of material accumulation and blockage caused by a downward-extending valve stem. This significantly reduces the risk of media adhesion and equipment clogging.

[0003] Existing top-mounted discharge valves use flexible graphite packing or PTFE packing to prevent media leakage. However, these two types of packing are prone to wear due to friction with the valve stem during valve opening and closing, leading to media leakage and a significant decrease in valve sealing reliability. This makes it difficult to meet the needs of various industries for efficient, stable, and long-term operation of equipment.

[0004] Therefore, a bellows-sealed top-mounted discharge valve is needed to solve the above-mentioned technical problems. Utility Model Content

[0005] To achieve the above objectives, this utility model provides the following technical solution: a bellows-sealed top-expanding discharge valve, comprising: a valve body assembly, an insulation sleeve, a valve disc assembly, a valve cover assembly, a packing sealing layer, a valve stem assembly, a bracket, and a drive device;

[0006] The valve body assembly is fitted with the heat insulation sleeve, one end of the valve body assembly is provided with the valve cover assembly, the inner wall of the valve cover assembly is provided with the packing sealing layer, the valve stem assembly is slidably disposed in the valve cover assembly and the valve body assembly, one end of the valve stem assembly is connected to the valve disc assembly, and the other end is connected to the drive device.

[0007] The drive device is connected to the end of the valve cover assembly away from the valve body assembly via the bracket.

[0008] The valve stem assembly includes: a stem body, a bellows, an upper connecting block, a lower connecting block, a lower thread, and an upper thread;

[0009] The bellows is sleeved on the outside of the rod body. One end of the bellows is connected to the outer wall of the rod body through the upper connecting block, and the other end is connected to the valve cover assembly through the lower connecting block.

[0010] One end of the rod is threaded to the valve disc assembly via the upper thread on its outer wall, and the other end is threaded to the output end of the drive device via the lower thread on its outer wall.

[0011] Furthermore, preferably, the valve body assembly includes: a feed channel and a discharge channel;

[0012] The feed channel is connected to the valve cover assembly at one end, and the feed channel is connected to the discharge channel which is inclined to its axis.

[0013] Furthermore, preferably, the insulation sleeve includes an inlet and an outlet;

[0014] The insulation sleeve is connected to the inlet and the outlet, respectively, and the ends of the inlet and the outlet away from the insulation sleeve are connected to the external supply mechanism and the external collection mechanism, respectively.

[0015] Furthermore, preferably, the valve stem assembly further includes: a mounting hole;

[0016] The rod body has multiple mounting holes perpendicular to the axis of the rod body at one end near the valve disc assembly.

[0017] Furthermore, as a preferred embodiment, the valve disc assembly includes: a disc body, an internal thread, a locking hole, and a locking element;

[0018] The valve body has a connecting hole with internal thread inside, and the rod body is threaded to the connecting hole through the upper thread. The valve body has a plurality of locking holes perpendicular to the valve body axis, and the plurality of locking holes are connected to the plurality of mounting holes one by one to form a locking channel.

[0019] Each of the aforementioned card slot channels is equipped with a card slot component.

[0020] Furthermore, as a preferred embodiment, the packing sealing layer includes: a packing gasket, a packing layer, and a spacer ring;

[0021] The spacer ring has a packing layer on each side, and each packing layer has a packing gasket on the side away from the spacer ring.

[0022] Furthermore, as a preferred embodiment, a packing pressure plate is provided at the opening of the valve cover assembly away from the valve body assembly, and a packing pressure sleeve is provided between the packing pressure plate and the packing sealing layer;

[0023] The valve cover assembly has a double-layer structure.

[0024] Furthermore, preferably, the support includes: a frame and a guide member;

[0025] The frame is connected between the valve cover assembly and the drive device. The guide is slidably mounted on the frame, and the end of the guide away from the frame is fixedly connected to the outer wall of the rod.

[0026] Furthermore, as a preferred embodiment, the drive device is provided with a rotatable valve stem nut, the valve stem nut is connected to the output end of the drive device, and the rod body is threadedly connected to the valve stem nut via the lower thread.

[0027] Compared with the prior art, this utility model provides a bellows-sealed top-mounted discharge valve, which has the following beneficial effects:

[0028] Advantage 1: This application features a dual-sealing structure. The packing sealing layer provides initial sealing against leakage, while the bellows provides secondary sealing against leakage. Furthermore, it maintains a highly efficient sealing state even after the initial sealing fails. Through synchronous extension and retraction with the rod and rigid fixing, a reliable isolation barrier is formed, preventing media leakage. This improves the sealing reliability of the top-mounted discharge valve, extends its service life, and meets the requirements for efficient and stable operation.

[0029] Advantage 2: This application, based on the threaded connection between the valve body and the stem, adds a circumferential rotation locking component perpendicular to their axes. The locking component is inserted into the locking channel formed by the locking hole and the mounting hole, thereby achieving circumferential rotational limiting and locking of the valve body. This effectively restricts the circumferential rotation of the valve body during stem movement, preventing loosening and detachment due to long-term stress, media erosion, or vibration. This ensures the coordinated transmission accuracy of the valve disc assembly and the valve stem assembly, thereby improving the structural stability of the upward-expanding discharge valve and ensuring long-term reliable valve operation. Attached Figure Description

[0030] Figure 1 A schematic diagram of a bellows-sealed top-mounted discharge valve in its closed state;

[0031] Figure 2 A schematic diagram of the valve body assembly and insulation sleeve structure of a bellows-sealed top-mounted discharge valve.

[0032] Figure 3 A schematic diagram of the valve cover assembly of a bellows-sealed top-mounted discharge valve.

[0033] Figure 4 A schematic diagram of the packing sealing layer structure of a bellows-sealed top-mounted discharge valve;

[0034] Figure 5 A schematic diagram of the stem assembly structure of a bellows-sealed top-mounted discharge valve.

[0035] Figure 6A schematic diagram of the valve disc assembly of a bellows-sealed, top-mounted discharge valve.

[0036] Figure 7 A schematic diagram of a bellows-sealed, top-mounted discharge valve support structure;

[0037] Figure 8 A schematic diagram of the open state of a bellows-sealed top-mounted discharge valve;

[0038] In the diagram: 1. Valve body assembly; 11. Feed channel; 12. Discharge channel; 2. Insulation sleeve; 21. Inlet; 22. Outlet; 3. Valve disc assembly; 31. Disc body; 32. Internal thread; 33. Locking hole; 34. Locking component; 4. Valve cover assembly; 5. Packing sealing layer; 51. Packing gasket; 52. Packing layer; 53. Spacer ring; 6. Valve stem assembly; 61. Stem body; 62. Bellows; 63. Upper connecting block; 64. Lower connecting block; 65. Lower thread; 66. Upper thread; 67. Mounting hole; 7. Bracket; 71. Frame; 72. Guide component; 8. Drive device; 81. Valve stem nut; 9. Packing sleeve; 10. Packing pressure plate. Detailed Implementation

[0039] Please see Figures 1-8 This utility model provides a bellows-sealed top-expanding discharge valve, including: valve body assembly 1, insulation sleeve 2, valve disc assembly 3, valve cover assembly 4, packing sealing layer 5, valve stem assembly 6, bracket 7, and drive device 8.

[0040] Among them, the valve body assembly 1 is covered with a heat insulation sleeve 2, one end of the valve body assembly 1 is provided with a valve cover assembly 4, the inner wall of the valve cover assembly 4 is provided with a packing sealing layer 5, the valve stem assembly 6 is slidably disposed in the valve cover assembly 4 and the valve body assembly 1, one end of the valve stem assembly 6 is connected to the valve disc assembly 3, and the other end is connected to the drive device 8.

[0041] The end of the valve cover assembly 4 away from the valve body assembly 1 is connected to the drive device 8 via a bracket 7.

[0042] In this embodiment, please refer to Figure 1 As shown, valve body assembly 1, as the main structure of the top-mounted discharge valve, primarily provides a flow channel for the medium. The inner wall of valve body assembly 1 is precision polished to adapt to medium transportation under both ordinary and complex operating conditions. It also provides an installation foundation and structural support for components such as valve stem assembly 6, ensuring overall assembly accuracy. The insulation sleeve 2, fitted onto the outside of valve body assembly 1, effectively reduces heat loss of the flowing medium within the valve body assembly 1, preventing solidification or viscosity increase due to temperature drops, ensuring smooth medium transportation, and meeting the operational requirements under high-temperature conditions.

[0043] In this embodiment, the packing sealing layer 5 is a composite packing structure, embedded in the mating area between the valve cover assembly 4 and the valve stem assembly 6, and provides axial sealing. This effectively prevents leakage of the medium inside the valve body assembly 1 along the gap between the valve cover assembly 4 and the valve stem assembly 6, combining sealing reliability and wear resistance, and is suitable for sealing requirements of corrosive media. The bracket 7 is welded from carbon steel or stainless steel, serving to stabilize the drive device 8, ensure transmission concentricity, prevent shaking during operation of the drive device 8, and ensure transmission accuracy. The drive device 8 is pneumatically or electrically driven, outputting axial driving force during operation to move the valve stem assembly 6, thereby controlling the opening and closing of the upward-expanding discharge valve to meet the adjustment requirements of the medium discharge volume under various working conditions.

[0044] The valve stem assembly 6 includes: a stem body 61, a bellows 62, an upper connecting block 63, a lower connecting block 64, a lower thread 65, and an upper thread 66;

[0045] Among them, a bellows 62 is sleeved on the outside of the rod body 61. One end of the bellows 62 is connected to the outer wall of the rod body 61 through the upper connecting block 63, and the other end is connected to the valve cover assembly 4 through the lower connecting block 64.

[0046] One end of the rod 61 is threaded to the valve disc assembly 3 via an upper thread 66 on its outer wall, and the other end is threaded to the output end of the drive device 8 via a lower thread 65 on its outer wall.

[0047] Furthermore, the valve body assembly 1 includes: a feed channel 11 and a discharge channel 12;

[0048] One end of the feed channel 11 is connected to the valve cover assembly 4, and the feed channel 11 is connected to the discharge channel 12 which is inclined to its axis.

[0049] Furthermore, the insulation sleeve 2 includes: an inlet 21 and an outlet 22;

[0050] The insulation sleeve 2 is connected to an inlet 21 and an outlet 22, respectively. The ends of the inlet 21 and the outlet 22 that are away from the insulation sleeve 2 are connected to an external supply mechanism and an external collection mechanism, respectively.

[0051] In this embodiment, please refer to Figure 1 and Figure 2 As shown, the valve body assembly 1 consists of an inlet channel 11 and a discharge channel 12, which together form a complete medium conveying passage. The medium smoothly enters from the end of the inlet channel 11 away from the valve cover assembly 4 and is discharged from the discharge channel 12, realizing the directional conveying and unloading of the medium. The insulation sleeve 2 adopts a fully enclosed structure and is fitted onto the outer wall of the inlet channel 11 and the discharge channel 12, with a pre-set gap, forming a sealed insulation medium flow cavity. This cavity is connected to the pre-set inlet 21 and outlet 22 on the insulation sleeve 2, forming a complete insulation medium circulation system.

[0052] In this embodiment, specifically: the insulation medium is quantitatively supplied by an external supply mechanism and uniformly introduced into the flow cavity through inlet 21, fully contacting the outer walls of the feed channel 11 and discharge channel 12. Through heat conduction, the medium inside the valve body assembly 1 is kept at a constant temperature. Subsequently, it is discharged through outlet 22 to an external collection mechanism, where it is filtered, kept at a constant temperature, and then recycled back to the external supply mechanism, achieving the recycling and reuse of the insulation medium, improving energy efficiency and reducing operating costs. The insulation sleeve 2 can effectively control the temperature fluctuations of the medium inside the feed channel 11 and discharge channel 12, preventing solidification or sudden viscosity increases due to excessively low temperatures, or chemical changes and component decomposition due to unstable temperatures. This ensures stable medium performance and avoids flow channel blockage caused by medium changes, ensuring long-term stable operation.

[0053] Furthermore, the valve stem assembly 6 also includes: a mounting hole 67;

[0054] Among them, the end of the rod 61 near the valve disc assembly 3 has multiple mounting holes 67 perpendicular to the axis of the rod 61.

[0055] In this embodiment, please refer to Figure 5 As shown, the valve stem assembly 6 is equipped with a bellows 62, which is made of high-strength, corrosion-resistant metal material, preferably Hastelloy or 316L stainless steel. Its structural design provides excellent toughness, pressure resistance, and fatigue resistance. The metal bellows 62, through its inherent corrosion resistance, effectively resists corrosion from various media, preventing pitting, cracking, and other damage to the bellows wall, thus preventing a decline in sealing performance and a shortened service life. Simultaneously, the bellows 62 has a certain axial expansion and contraction compensation capacity, adapting to the up-and-down movement of the valve stem assembly 6, achieving corrosion protection without affecting transmission accuracy.

[0056] Furthermore, the valve disc assembly 3 includes: a disc body 31, an internal thread 32, a locking hole 33, and a locking element 34;

[0057] The valve body 31 has a connecting hole with an internal thread 32 inside. The rod body 61 is threaded to the connecting hole through an upper thread 66. The valve body 31 has multiple locking holes 33 perpendicular to the axis of the valve body 31. The multiple locking holes 33 are connected to the multiple mounting holes 67 one by one to form a locking channel.

[0058] Each card slot channel is equipped with a card slot component 34.

[0059] In this embodiment, please refer to Figure 1 , Figure 5 and Figure 6As shown, to ensure assembly accuracy and operational safety, the valve disc assembly 3 and valve stem assembly 6 can only be assembled when the top-mounted discharge valve is fully open. The assembly process follows the principles of precise positioning and reliable connection. The specific operation procedure is as follows: The operator first assembles the disc body 31 of the valve disc assembly 3 and the stem body 61 of the valve stem assembly 6 using a threaded connection. Specifically, the operator screws the pre-set connecting hole with internal thread 32 on the disc body 31 into the end of the stem body 61 near the upper thread 66. During the screwing process, the screwing torque must be controlled to ensure a tight connection between the two and avoid assembly gaps that could cause shaking or media leakage during subsequent operation.

[0060] In a preferred embodiment, this application has two mounting holes 67 symmetrically distributed, and two locking holes 33 symmetrically distributed. After the valve body 31 and the rod body 61 are threadedly connected, the operator needs to precisely insert the locking component 34 into the locking channel formed by the locking holes 33 pre-set on the valve body 31 and the corresponding mounting holes 67 on the rod body 61 to limit and lock the circumferential rotation of the valve body 31. Based on the threaded connection between the valve body 31 and the rod body 61, this application adds a circumferential rotation locking component perpendicular to the axis of both, which can effectively limit the circumferential rotation of the valve body 31 during the movement of the rod body 61, prevent the valve body 31 from loosening and falling off due to long-term stress, media erosion or vibration, and thus ensure the cooperative transmission accuracy of the valve disc assembly 3 and the valve stem assembly 6, and ensure the long-term stable operation of the upward-expanding discharge valve.

[0061] It is important to note that during the machining of the locking hole 33 and the mounting hole 67, the machining must be carried out strictly in accordance with the preset assembly datum. The hole size tolerance, position tolerance and hole wall roughness must be strictly controlled to ensure that after the valve body 31 and the rod body 61 are completed with thread assembly, the locking hole 33 and the mounting hole 67 of the two can correspond one by one and be connected. This ensures that the locking part 34 can be smoothly inserted and fit tightly against the hole wall, avoiding locking failure due to hole misalignment, which would affect the assembly quality and valve operation reliability.

[0062] Furthermore, the packing sealing layer 5 includes: a packing sealing gasket 51, a packing layer 52, and a spacer ring 53;

[0063] Among them, a packing layer 52 is provided on both sides of the spacer ring 53, and a packing gasket 51 is provided on the side of each packing layer 52 away from the spacer ring 53.

[0064] Furthermore, a packing pressure plate 10 is provided at the opening of the valve cover assembly 4 away from the valve body assembly 1, and a packing pressure sleeve 9 is provided between the packing pressure plate 10 and the packing sealing layer 5.

[0065] Valve cover assembly 4 has a double-layer structure.

[0066] In this embodiment, please refer to Figure 1 , Figure 3 and Figure 4 As shown, the packing pressure plate 10 is assembled onto the valve cover assembly 4 using a bolt-on detachable connection method, which facilitates easy assembly and disassembly, and makes subsequent inspection, replacement, and maintenance of the packing sealing layer 5 convenient. The core function of the packing pressure plate 10 is to apply a uniform axial preload to the packing sealing layer 5 through the packing sleeve 9, thereby achieving axial locking and limiting of the packing sealing layer 5. This effectively prevents the packing sealing layer 5 from loosening or falling off from the valve cover assembly 4 under the repeated action of the axial movement of the valve stem assembly 6, avoiding failures such as decreased overall structural stability and sealing failure of the upward-expanding discharge valve.

[0067] In a preferred embodiment, the packing sealing layer 5 in this application serves as a preliminary sealing and leak-proof component. It employs a layered structure of flexible graphite and polytetrafluoroethylene composite packing. During operation, under the pre-tightening pressure of the packing sleeve 9, the packing sealing layer 5 tightly adheres to the outer wall of the rod 61 and the inner wall of the valve cover assembly 4, forming a reliable sealing interface. This effectively prevents leakage of the medium flowing inside the valve body assembly 1 along the gap between the rod 61 and the valve cover assembly 4. This avoids medium waste and environmental pollution, prevents leaked medium from causing corrosion damage to other valve components, and further ensures the sealing reliability and long-term stable operation capability of the upward-expanding discharge valve.

[0068] Furthermore, the support 7 includes: a frame 71 and a guide member 72;

[0069] The frame 71 is connected between the valve cover assembly 4 and the drive device 8. A guide 72 is slidably provided on the frame 71, and the end of the guide 72 away from the frame 71 is fixedly connected to the outer wall of the rod 61.

[0070] In this embodiment, please refer to Figure 7 As shown, the main structure of the bracket 7 is the frame 71, and the guide 72 is rigidly fixedly connected to the rod 61, forming a synchronous transmission structure. When the upward-expanding discharge valve switches between the open and closed states, the rod 61 reciprocates axially in the vertical direction, synchronously driving the guide 72 to reciprocate within the guide rail of the frame 71. The guide 72 can achieve a bidirectional limiting effect on the rod 61, providing stable axial guidance, limiting the radial offset of the rod 61, ensuring the straightness and axial movement accuracy of the reciprocating movement of the rod 61, and also achieving circumferential anti-rotation limiting to prevent the rod 61 from circumferentially twisting during movement, ensuring the smooth opening and closing of the upward-expanding discharge valve.

[0071] Furthermore, the drive device 8 is provided with a valve stem nut 81 that can be fixedly rotated. The valve stem nut 81 is connected to the output end of the drive device 8, and the rod body 61 is threadedly connected to the valve stem nut 81 through the lower thread 65.

[0072] In this embodiment, please refer to Figure 1, Figure 7 and Figure 8 As shown, the top-mounted discharge valve is in the closed state (e.g.) Figure 1 When the valve body 31 is in the state shown, it fits against the feed channel 11, forming a reliable blockage and preventing external media from entering the internal flow channel of the valve body assembly 1, thus achieving the shut-off control of media delivery. If it is necessary to open the upward-expanding discharge valve for media discharge, the drive device 8 is started. The power element built into the drive device 8 drives its output end to rotate in a directional manner through the internal transmission structure, thereby driving the valve stem nut 81 to rotate in a fixed manner. Based on the thread engagement relationship between the valve stem nut 81 and the preset lower thread 65 on the rod body 61, the rotational motion is converted into axial linear motion, driving the rod body 61 to move smoothly upward in the vertical direction (e.g., Figure 8 (As shown by the solid arrow). As the rod 61 moves upward, the petal 31 moves upward synchronously, forming a feeding channel between the petal 31 and the feeding channel 11. External media can smoothly enter the feeding channel 11 through this feeding channel, and after flowing through the flow channel, it is directionally discharged through the discharge channel 12 (e.g., Figure 8 (As shown by the dashed arrow in the middle), the medium discharge operation is completed.

[0073] In this embodiment, during the switching between the open and closed states of the top-mounted discharge valve, the rod 61 needs to reciprocate axially in the vertical direction. During this prolonged reciprocating movement, the outer wall of the rod 61 will continuously rub against the packing seal layer 5, causing wear and gradually reducing its sealing performance. This leads to a leakage channel forming between the rod 61 and the valve cover assembly 4, resulting in the failure of the initial sealing and leak-proof function. At this time, the medium inside the valve body assembly 1 will leak through this leakage channel, not only wasting the medium and polluting the working environment, but also potentially damaging other valve components due to the corrosiveness and high-temperature characteristics of the leaking medium, seriously affecting the normal operation and safety of the top-mounted discharge valve.

[0074] In a preferred embodiment, this application provides a rod 61 with a bellows 62 to provide secondary sealing and leak prevention for the upward-expanding discharge valve. This ensures a highly efficient and reliable seal even when the initial sealing fails, guaranteeing that no internal media leakage occurs throughout the entire operation of the upward-expanding discharge valve. Specifically, during the opening of the upward-expanding discharge valve, the rod 61 moves upward vertically, simultaneously causing the externally fitted bellows 62 to undergo axial tensile deformation. Conversely, during the closing of the upward-expanding discharge valve, the rod 61 moves downward vertically, simultaneously causing the externally fitted bellows 62 to undergo axial retraction deformation. The end of the bellows 62 away from the valve disc assembly 3 is fixedly connected to the valve cover assembly 4 via the lower connecting block 64. Therefore, during the opening and closing of the upward-expanding discharge valve, the bellows 62 always serves as an isolation barrier between the internal space of the valve body assembly 1 and the leakage channel. Even if the packing seal layer 5 is worn for a long time, causing the initial sealing and leakage prevention to fail, the medium inside the valve body assembly 1 will be effectively blocked by the bellows 62 and cannot leak out through the leakage channel, thereby ensuring the sealing reliability and long-term stable operation capability of the upward-expanding discharge valve and adapting to the usage requirements of various working conditions.

[0075] As a preferred embodiment, this application features a dual-sealing structure. The packing sealing layer 5 provides initial sealing against leakage, while the bellows 62 provides secondary sealing against leakage. Furthermore, it maintains a highly efficient sealing state even after the initial sealing fails. Through synchronous extension and retraction with the rod 61 and rigid fixing, a reliable isolation barrier is formed, preventing media leakage. This improves the sealing reliability of the upward-expanding discharge valve, extends its service life, and meets the requirements for efficient and stable operation.

[0076] In practice, when the upward-expanding discharge valve is closed, the valve body 31 fits against the feed channel 11, reliably blocking the feed channel 11 and preventing external media from entering the internal flow channel of the valve body assembly 1, thus achieving the cutoff control of media delivery. If it is necessary to open the upward-expanding discharge valve for media discharge, the drive device 8 is activated. The power element built into the drive device 8 drives its output end to rotate directionally through the internal transmission structure, thereby driving the valve stem nut 81 to rotate in a fixed manner. Based on the thread engagement relationship between the valve stem nut 81 and the preset lower thread 65 on the rod body 61, the rotational motion is converted into axial linear motion, driving the rod body 61 to move smoothly upward in the vertical direction. As the rod body 61 moves upward, the valve body 31 moves upward synchronously, forming a feed channel between the valve body 31 and the feed channel 11. External media can smoothly enter the feed channel 11 through this feed channel, and after flowing through the flow channel, it is directionally discharged through the discharge channel 12, completing the media discharge operation.

[0077] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A bellows-sealed top-mounted discharge valve, characterized in that: include: Valve body assembly (1), insulation sleeve (2), valve disc assembly (3), valve cover assembly (4), packing seal layer (5), valve stem assembly (6), bracket (7), and drive device (8); The valve body assembly (1) is covered with the heat insulation sleeve (2), one end of the valve body assembly (1) is provided with the valve cover assembly (4), the inner wall of the valve cover assembly (4) is provided with the packing sealing layer (5), the valve stem assembly (6) is slidably disposed in the valve cover assembly (4) and the valve body assembly (1), one end of the valve stem assembly (6) is connected to the valve disc assembly (3), and the other end is connected to the driving device (8); The valve cover assembly (4) is connected to the drive device (8) via the bracket (7) at one end away from the valve body assembly (1). The valve stem assembly (6) includes: a stem body (61), a bellows (62), an upper connecting block (63), a lower connecting block (64), a lower thread (65), and an upper thread (66). The bellows (62) is sleeved on the outside of the rod (61). One end of the bellows (62) is connected to the outer wall of the rod (61) through the upper connecting block (63), and the other end is connected to the valve cover assembly (4) through the lower connecting block (64). One end of the rod (61) is threaded to the valve assembly (3) via the upper thread (66) on its outer wall, and the other end is threaded to the output end of the drive device (8) via the lower thread (65) on its outer wall.

2. The bellows-sealed top-mounted discharge valve according to claim 1, characterized in that: The valve body assembly (1) includes: a feed channel (11) and a discharge channel (12); One end of the feed channel (11) is connected to the valve cover assembly (4), and the feed channel (11) is connected to the discharge channel (12) which is inclined to its axial direction.

3. The bellows-sealed top-mounted discharge valve according to claim 1, characterized in that: The insulation sleeve (2) includes an inlet (21) and an outlet (22); The insulation sleeve (2) is connected to the inlet (21) and the outlet (22), and the ends of the inlet (21) and the outlet (22) away from the insulation sleeve (2) are connected to the external supply mechanism and the external collection mechanism, respectively.

4. The bellows-sealed top-mounted discharge valve according to claim 1, characterized in that: The valve stem assembly (6) further includes: a mounting hole (67); The rod (61) has a plurality of mounting holes (67) at one end near the valve assembly (3) that are perpendicular to the axis of the rod (61).

5. A bellows-sealed top-mounted discharge valve according to claim 4, characterized in that: The valve assembly (3) includes: a valve body (31), an internal thread (32), a locking hole (33), and a locking element (34). The valve body (31) has a connecting hole with the internal thread (32) inside. The rod body (61) is threaded to the connecting hole through the upper thread (66). The valve body (31) has a plurality of locking holes (33) perpendicular to the axis of the valve body (31). The plurality of locking holes (33) and the plurality of mounting holes (67) are connected one-to-one to form a locking channel. Each of the aforementioned card slot channels is provided with a card slot component (34).

6. The bellows-sealed top-mounted discharge valve according to claim 1, characterized in that: The packing sealing layer (5) includes: a packing sealing gasket (51), a packing layer (52), and a spacer ring (53); The spacer ring (53) is provided with the packing layer (52) on both sides, and each packing layer (52) is provided with the packing gasket (51) on the side away from the spacer ring (53).

7. A bellows-sealed top-mounted discharge valve according to claim 1, characterized in that: A packing pressure plate (10) is provided at the opening of the valve cover assembly (4) away from the valve body assembly (1), and a packing pressure sleeve (9) is provided between the packing pressure plate (10) and the packing sealing layer (5). The valve cover assembly (4) has a double-layer structure.

8. A bellows-sealed top-mounted discharge valve according to claim 1, characterized in that: The support (7) includes: a frame (71) and a guide (72); The frame (71) is connected between the valve cover assembly (4) and the drive device (8). The guide (72) is slidably disposed on the frame (71). One end of the guide (72) away from the frame (71) is fixedly connected to the outer wall of the rod (61).

9. A bellows-sealed top-mounted discharge valve according to claim 1, characterized in that: The drive device (8) is provided with a fixed rotatable valve stem nut (81), the valve stem nut (81) is connected to the output end of the drive device (8), and the rod body (61) is threadedly connected to the valve stem nut (81) through the lower thread (65).

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