Transmission structure of balance type low-leakage-rate regulating valve

Abstract

The utility model discloses a transmission structure of a balanced low-leakage regulating valve, which comprises an actuator fixed on the outer side of a valve body and fixedly connected with a driving shaft transmission component. The driving shaft transmission assembly is rotationally connected with the valve body through the first support assembly and the second support assembly, and the driving shaft transmission assembly is located above the valve body. The driven shaft transmission assembly is in transmission connection with the driving shaft transmission assembly through a connecting rod; a driven shaft of the driven shaft transmission assembly is rotationally connected into the valve body, and blades located in the valve body are fixedly connected with the driven shaft. The double-actuator transmission structure solves the problems that an existing double-actuator transmission structure is high in space requirement and prone to transmission lag and transmission instability.

Description

Technical Field

[0001] The utility model belongs to the technical field of valve transmission, and relates to a transmission structure of a balanced low-leakage regulating valve. Background Art

[0002] The regulating valve is an important part of the nuclear-grade ventilation system. By turning the valve blade, the valve is opened and closed, thereby achieving the regulating effect of opening and closing the ventilation system. For different ventilation systems, the regulating valve has different internal leakage levels. With the further development of the nuclear power field, installing a large-sized valve in a complex and limited installation space and meeting the valve design requirements has put forward higher requirements on the valve structure, and the structure of the regulating valve needs to be further optimized.

[0003] The existing large-size valve structures that meet the II-level leakage in NB / T20039.2 are mostly left-right symmetrical double actuator transmission structures, which realize the split transmission by rotating blades under the drive of the left and right actuators. In this structure, since the transmission is realized under the drive of two symmetrical actuators, the space is required to be large enough, but in practice, the size of the valve equipment is limited by the surrounding installation environment in the nuclear power plant; at the same time, there may be a transmission lag in the double actuator transmission process, so the valve transmission consistency design requirements cannot be met; furthermore, when the valve specification is too large, the valve length will be very long, the transmission will be unstable, and the sealing effect will be relatively reduced. Summary of the invention

[0004] In order to achieve the above-mentioned purpose, the utility model provides a transmission structure of a balanced low-leakage regulating valve, which solves the problems of high space requirements, easy transmission lag and unstable transmission of the existing dual-actuator transmission structure.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is a transmission structure of a balanced low-leakage regulating valve, including an actuator, which is fixed to the outside of the valve body, and the actuator is fixedly connected to the active shaft transmission assembly; the active shaft transmission assembly and the valve body are rotatably connected via a first bracket assembly and a second bracket assembly, wherein the active shaft transmission assembly is located above the valve body; the passive shaft transmission assembly and the active shaft transmission assembly are connected via a connecting rod transmission; the passive shaft of the passive shaft transmission assembly is rotatably connected to the valve body, and the blades located inside the valve body are fixedly connected to the passive shaft.

[0006] Furthermore, the driving shaft transmission assembly also includes a support cover, the support cover is fixedly connected to the bracket of the actuator, the driving shaft passes through the support cover and is fixedly connected to the actuator, the support sleeve is arranged on the driving shaft, the support sleeve is located between the driving shaft and the support cover, the support cover and the support sleeve are fixedly connected by a slotted cone-end set screw; the driving shaft and the connecting rod are transmission-connected by a main swing arm assembly; the first bracket assembly is located on both sides of the driving shaft of the driving shaft transmission assembly, and the second bracket assembly is located in the middle of the driving shaft.

[0007] Furthermore, the first bracket assembly includes an L-shaped first bracket, which is fixedly connected to the valve body; the driving shaft passes through the first bracket and is rotatably connected to the valve body through a first self-aligning ball bearing; the first self-aligning ball bearing is fixed in the valve body through a first bearing cover; the first bearing cover and the first bracket are fixedly connected; a first dust cover is fixed to the side of the first bracket away from the valve body, and the first dust cover is mounted on the driving shaft.

[0008] Furthermore, the first dust cover, the first bracket, and the first bearing cover are fixedly connected by a first hexagonal head bolt, a first spring washer, a first non-metallic insert locking thick nut, and a first flat washer; the lower part of the first bracket and the valve body are fixedly connected by a second hexagonal head bolt, a second spring washer, a second non-metallic insert locking thick nut, and a second flat washer; the first bearing cover is fixed to the first self-aligning ball bearing by a hexagon socket cylindrical head screw, and a first copper washer is also provided between the hexagon socket cylindrical head screw and the first bearing cover.

[0009] Furthermore, a first sealing ring is arranged between the first bearing cover and the driving shaft, a second sealing ring is arranged between the first dust cover and the driving shaft, and a third sealing ring is arranged between the first bearing cover and the first bracket.

[0010] Furthermore, the second bracket assembly includes a second bracket, which is fixed above the valve body; a sealing plate is fixed above the second bracket assembly; a driving shaft passes through the sealing plate and is rotatably connected to the sealing plate through a second self-aligning ball bearing; the second self-aligning ball bearing is fixed inside the sealing plate through a second bearing cover; a second dust cover is provided at the junction of the driving shaft and the sealing plate, and the second dust cover is sleeved on the driving shaft and fixed to the sealing plate.

[0011] Furthermore, the second self-aligning ball bearing and the second bearing cover are fixed by a second hexagon socket cylindrical head screw, and a second copper washer is arranged between the second hexagon socket cylindrical head screw and the second bearing cover; the second bracket and the valve body are fixed by a third hexagon head bolt, a third spring washer, a third non-metallic insert locking thick nut, and a third flat washer; the second bearing cover, the sealing plate, and the second dust cover are fixed by a fourth hexagon head bolt, a fourth spring washer, a fourth non-metallic insert locking thick nut, and a fourth flat washer.

[0012] Furthermore, a fourth sealing ring is arranged between the second dust cover and the driving shaft, a fifth sealing ring is arranged between the second bearing cover and the sealing plate, and a sixth sealing ring is arranged between the second bearing cover and the driving shaft.

[0013] The beneficial effects of the utility model are:

[0014] Compared with the existing large-scale II-level leakage valve structure, the utility model only uses one drive device, which not only saves installation space, but also reduces the cost of the valve; secondly, compared with installing a drive device on each side, the utility model can achieve a certain degree of transmission consistency and stability, thereby more effectively ensuring the sealing of the valve, and ultimately meeting the design requirements of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a front view of the transmission structure of the embodiment of the utility model installed in the regulating valve.

[0017] Figure 2 yes Figure 1 Right view of .

[0018] Figure 3 yes Figure 1 Top view of the .

[0019] Figure 4 It is a schematic diagram of the driving shaft transmission component of an embodiment of the utility model.

[0020] Figure 5 It is a schematic diagram of the first bracket components on both sides of an embodiment of the utility model.

[0021] Figure 6 It is a schematic diagram of the second bracket assembly in the middle of an embodiment of the utility model.

[0022] In the figure, 1. actuator, 2. driving shaft transmission assembly, 3. valve body, 4. blade, 5. driven shaft transmission assembly, 2-2. support cover, 2-3. slotted cone end set screw, 2-4. support sleeve, 2-5. connecting rod, 2-6. main swing arm assembly, 2-7. first bracket assembly, 2-8. driving shaft, 2-9. second bracket assembly, 2-71. first bracket, 2-72. first hexagonal head bolt, 2-73. first spring washer, 2-74. first non-metallic insert locking thick nut, 2-75. first flat washer, 2-76. second hexagonal head bolt, 2-77. second spring washer, 2-78. second non-metallic insert locking thick nut, 2-79. second flat washer, 2-710. first dust cover, 2-711. first bearing cover, 2-712. Hexagon socket head screw, 2-713. First copper washer, 2-714. First self-aligning ball bearing, 2-715. First sealing ring, 2-716. Second sealing ring, 2-717. Third sealing ring, 2-91. Second bracket, 2-92. Third hexagon head bolt, 2-93. Third spring washer, 2-94. Third non-metallic insert locking thick nut, 2-95. Third flat washer, 2-96. Closing plate, 2-97. Second hexagon socket head screw, 2-98. Second copper washer, 2-99. Second bearing cover, 2-910. Fourth hexagon head bolt, 2-911. Fourth spring washer, 2-912. Fourth non-metallic insert locking thick nut, 2-913. Fourth flat washer, 2-914. Second dust cover, 2-915. Fourth sealing ring, 2-916. Fifth sealing ring, 2-917. Second self-aligning ball bearing, 2-918. Sixth sealing ring. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] like Figure 1 to Figure 6As shown, the utility model provides a transmission structure of a balanced low leakage regulating valve, including an actuator 1, the actuator 1 is fixed to the outside of the valve body 3, and the actuator 1 is fixedly connected to the driving shaft transmission assembly 2; the driving shaft transmission assembly 2 is rotatably connected to the valve body 3 through the first bracket assembly 2-7 and the second bracket assembly 2-9, wherein the driving shaft transmission assembly 2 is located above the valve body 3, the first bracket assembly 2-7 is located on both sides of the driving shaft 2-8 of the driving shaft transmission assembly 2, and the second bracket assembly 2-9 is located in the middle of the driving shaft 2-8; the passive shaft transmission assembly 5 is transmission-connected to the active shaft transmission assembly 2 through the connecting rod 2-5; the passive shaft of the passive shaft transmission assembly 5 is rotatably connected to the valve body 3, and the blade 4 located inside the valve body 3 is fixedly connected to the passive shaft. The actuator 1 in the valve outputs torque, and the active shaft transmission assembly 2 drives the passive shaft transmission assembly 5 to rotate the blade 4, thereby realizing the opening and closing of the valve.

[0025] In some embodiments, Figure 2 As shown, the driving shaft transmission assembly 2 includes a support cover 2-2 and a support sleeve 2-4; the support cover 2-2 is fixedly connected to the bracket of the actuator 1 by screws, and the support cover 2-2 plays a connecting support role, while strengthening the bracket strength of the actuator 1; the driving shaft 2-8 passes through the support cover 2-2 and is fixedly connected to the actuator 1, and the support sleeve 2-4 is sleeved on the driving shaft 2-8, and the support sleeve 2-4 is located between the driving shaft 2-8 and the support cover 2-2. Since the driving shaft 2-8 needs to rotate and the driving shaft 2-8 is too long, the support sleeve 2-4 can play a supporting and self-lubricating role, and its material is H62; the support cover 2-2 and the support sleeve 2-4 are fixedly connected by a slotted cone-end set screw 2-3; the driving shaft 2-8 and the connecting rod 2-5 are connected through the main swing arm assembly 2-6. The first bracket assembly 2-7 is provided at both ends of the driving shaft 2-8, and the second bracket assembly 2-9 is installed in the middle. In the case that the valve is long enough, such a structure can realize the function of the entire driving shaft 2-8 to achieve the heart alignment with the two in the middle, thereby reducing the transmission resistance. At the same time, the shaft diameter of the driving shaft 2-8 is thicker than the shaft diameter of the passive shaft, which not only realizes the smooth transmission, but also reduces the influence of the reduced sealing of the valve due to the excessive specification (the valve is too long). The appearance can also meet the space limitations of the surrounding environment of the valve installation. In addition to the support and heart alignment functions, the structure of the first bracket assembly 2-7 and the second bracket assembly 2-9 can also play a good dustproof effect.

[0026] In some embodiments, Figure 3As shown, the first bracket assembly 2-7 includes an L-shaped first bracket 2-71, and the first bracket 2-71 is fixedly connected to the valve body 3; the driving shaft 2-8 passes through the first bracket 2-71 and is rotatably connected to the valve body 3 through the first self-aligning ball bearing 2-714; the first self-aligning ball bearing 2-714 is fixed in the valve body 3 through the first bearing cover 2-711; the first bearing cover 2-711 and the first bracket 2-71 are fixedly connected; a first dust cover 2-710 is fixed on the side of the first bracket 2-71 away from the valve body 3, and the first dust cover 2-710 is mounted on the driving shaft 2-8 to prevent dust from entering the first self-aligning ball bearing 2-714 through the joint between the first bracket 2-71 and the driving shaft 2-8.

[0027] In some embodiments, the first dust cover 2-710, the first bracket 2-71, and the first bearing cover 2-711 are fixedly connected by a first hexagonal bolt 2-72, a first spring washer 2-73, a first non-metallic insert locking thick nut 2-74, and a first flat washer 2-75, wherein the bolt heads of the first flat washer 2-75 and the first hexagonal bolt 2-72 are located on the outside of the first dust cover 2-710, and the first spring washer 2-73 and the first non-metallic insert locking thick nut 2-74 are located on the first shaft The inner side of the bearing cover 2-711; the lower part of the first bracket 2-71 is fixedly connected with the valve body 3 by the second hexagonal bolt 2-76, the second spring washer 2-77, the second non-metallic insert locking thick nut 2-78, and the second flat washer 2-79, wherein the bolt head of the second hexagonal bolt 2-76 is located in the valve body 3, and the second spring washer 2-77, the second non-metallic insert locking thick nut 2-78, and the second flat washer 2-79 are sleeved on the end of the second hexagonal bolt 2-76 extending out of the first bracket 2-71. The first bearing cover 2-711 is fixed to the first self-aligning ball bearing 2-714 by the hexagon socket cylindrical head screw 2-712, and the first copper washer 2-713 is also arranged between the hexagon socket cylindrical head screw 2-712 and the first bearing cover 2-711 to prevent the hexagon socket cylindrical head screw 2-712 from damaging the first bearing cover 2-711 during the screwing process.

[0028] In some embodiments, a first sealing ring 2-715 is provided between the first bearing cover 2-711 and the driving shaft 2-8, a second sealing ring 2-716 is provided between the first dust cover 2-710 and the driving shaft 2-8, and a third sealing ring 2-717 is provided between the first bearing cover 2-711 and the first bracket 2-71. The provision of the above three sealing rings greatly enhances the sealing performance between the first bracket assembly 2-7 and the driving shaft 2-8.

[0029] In some embodiments, Figure 4As shown, the second bracket assembly 2-9 includes a second bracket 2-91, and the second bracket 2-91 is fixed above the valve body 3; the sealing plate 2-96 is fixed above the second bracket assembly 2-9; the driving shaft 2-8 passes through the sealing plate 2-96 and is rotatably connected to the sealing plate 2-96 through the second self-aligning ball bearing 2-917; the second self-aligning ball bearing 2-917 is fixed to the inside of the sealing plate 2-96 through the second bearing cover 2-99; a second dust cover 2-914 is provided at the junction of the driving shaft 2-8 and the sealing plate 2-96, and the second dust cover 2-914 is sleeved on the driving shaft 2-8 and fixed to the sealing plate 2-96 to play a dust-proof role.

[0030] In some embodiments, the second self-aligning ball bearing 2-917 is fixed to the second bearing cover 2-99 by a second hexagon socket head screw 2-97, and a second copper washer 2-98 is arranged between the second hexagon socket head screw 2-97 and the second bearing cover 2-99 to prevent damage to the second bearing cover 2-99; the second bracket 2-91 is fixed to the valve body 3 by a third hexagon head bolt 2-92, a third spring washer 2-93, a third non-metallic insert locking thick nut 2-94, and a third flat washer 2-95, wherein the bolt head of the third hexagon head bolt 2-92 is located in the valve body 3, and the third spring washer 2-93, the third non-metallic insert locking thick nut 2-94, and the third flat washer 2-95 are fixedly sleeved on the third hexagon head bolt 2-92 extending out of the first One end of the second bracket 2-91; the second bearing cover 2-99, the sealing plate 2-96, and the second dust cover 2-914 are fixed by the fourth hexagonal head bolt 2-910, the fourth spring washer 2-911, the fourth non-metallic insert locking thick nut 2-912, and the fourth flat washer 2-913, wherein the bolt head of the fourth hexagonal head bolt 2-910 and the fourth flat washer 2-913 are located on one side of the second bearing cover 2-99, the fourth spring washer 2-911, the fourth non-metallic insert locking thick nut 2-912 and the fourth flat washer 2-913 are sleeved on the fourth hexagonal head bolt 2-910, the fourth spring washer 2-911 and the fourth non-metallic insert locking thick nut 2-912 are located on one side of the second dust cover 2-914, and are connected by bolts, which is simple and convenient to disassemble.

[0031] In some embodiments, a fourth sealing ring 2-915 is provided between the second dust cover 2-914 and the driving shaft 2-8, a fifth sealing ring 2-916 is provided between the second bearing cover 2-99 and the sealing plate 2-96, and a sixth sealing ring 2-918 is provided between the second bearing cover 2-99 and the driving shaft 2-8. These three sealing rings improve the sealing performance of the second bracket assembly 2-9.

[0032] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A transmission structure of a balanced low leakage regulating valve, comprising an actuator (1), characterized in that: The actuator (1) is fixed to the outside of the valve body (3), and the actuator (1) is fixedly connected to the active shaft transmission assembly (2); the active shaft transmission assembly (2) and the valve body (3) are rotationally connected via a first bracket assembly (2-7) and a second bracket assembly (2-9), wherein the active shaft transmission assembly (2) is located above the valve body (3); the passive shaft transmission assembly (5) is transmission-connected to the active shaft transmission assembly (2) via a connecting rod (2-5); the passive shaft of the passive shaft transmission assembly (5) is rotationally connected to the valve body (3), and the blade (4) located inside the valve body (3) is fixedly connected to the passive shaft.

2. The transmission structure of a balanced low leakage regulating valve according to claim 1, characterized in that: The driving shaft transmission assembly (2) further comprises a support cover (2-2), wherein the support cover (2-2) is fixedly connected to a bracket of the actuator (1), the driving shaft (2-8) passes through the support cover (2-2) and is fixedly connected to the actuator (1), the support sleeve (2-4) is sleeved on the driving shaft (2-8), the support sleeve (2-4) is located between the driving shaft (2-8) and the support cover (2-2), and the support cover (2-2) and the support sleeve (2-4) are fixedly connected via a slotted cone-end set screw (2-3); the driving shaft (2-8) and the connecting rod (2-5) are transmission-connected via a main swing arm assembly (2-6); the first bracket assembly (2-7) is located on both sides of the driving shaft (2-8) of the driving shaft transmission assembly (2), and the second bracket assembly (2-9) is located in the middle of the driving shaft (2-8).

3. The transmission structure of a balanced low leakage regulating valve according to claim 1, characterized in that: The first bracket assembly (2-7) comprises an L-shaped first bracket (2-71), the first bracket (2-71) being fixedly connected to the valve body (3); the driving shaft (2-8) passes through the first bracket (2-71) and is rotatably connected to the valve body (3) via a first self-aligning ball bearing (2-714); the first self-aligning ball bearing (2-714) is fixed in the valve body (3) via a first bearing cover (2-711); the first bearing cover (2-711) and the first bracket (2-71) are fixedly connected; a first dust cover (2-710) is fixed to a side of the first bracket (2-71) away from the valve body (3), and the first dust cover (2-710) is sleeved on the driving shaft (2-8).

4. The transmission structure of a balanced low leakage regulating valve according to claim 3, characterized in that: The first dust cover (2-710), the first bracket (2-71), and the first bearing cover (2-711) are fixedly connected by a first hexagonal head bolt (2-72), a first spring washer (2-73), a first non-metallic insert locking thick nut (2-74), and a first flat washer (2-75); the lower part of the first bracket (2-71) and the valve body (3) are fixedly connected by a second hexagonal head bolt (2-76), a second spring washer (2-77), a second non-metallic insert locking thick nut (2-78), and a second flat washer (2-79); the first bearing cover (2-711) is fixedly connected to the first self-aligning ball bearing (2-714) by a hexagon socket head screw (2-712), and a first copper washer (2-713) is further provided between the hexagon socket head screw (2-712) and the first bearing cover (2-711).

5. The transmission structure of a balanced low leakage regulating valve according to claim 3 or 4, characterized in that: A first sealing ring (2-715) is provided between the first bearing cover (2-711) and the driving shaft (2-8), a second sealing ring (2-716) is provided between the first dust cover (2-710) and the driving shaft (2-8), and a third sealing ring (2-717) is provided between the first bearing cover (2-711) and the first bracket (2-71).

6. The transmission structure of a balanced low leakage regulating valve according to claim 1, characterized in that: The second bracket assembly (2-9) comprises a second bracket (2-91), the second bracket (2-91) is fixed on the top of the valve body (3); the sealing plate (2-96) is fixed on the top of the second bracket assembly (2-9); the driving shaft (2-8) passes through the sealing plate (2-96) and is rotatably connected to the sealing plate (2-96) via a second self-aligning ball bearing (2-917); the second self-aligning ball bearing (2-917) is fixed inside the sealing plate (2-96) via a second bearing cover (2-99); a second dust cover (2-914) is provided at the junction of the driving shaft (2-8) and the sealing plate (2-96), the second dust cover (2-914) is sleeved on the driving shaft (2-8) and is fixed to the sealing plate (2-96).

7. The transmission structure of a balanced low leakage regulating valve according to claim 6, characterized in that: The second self-aligning ball bearing (2-917) and the second bearing cover (2-99) are fixed by a second hexagon socket head screw (2-97), and a second copper washer (2-98) is provided between the second hexagon socket head screw (2-97) and the second bearing cover (2-99); the second bracket (2-91) and the valve body (3) are fixed by a third hexagon socket head bolt (2-92), a third spring washer (2-93), a third non-metallic insert locking thick nut (2-94), and a third flat washer (2-95); the second bearing cover (2-99), the sealing plate (2-96), and the second dust cover (2-914) are fixed by a fourth hexagon socket head bolt (2-910), a fourth spring washer (2-911), a fourth non-metallic insert locking thick nut (2-912), and a fourth flat washer (2-913).

8. The transmission structure of a balanced low leakage regulating valve according to claim 6 or 7, characterized in that: A fourth sealing ring (2-915) is provided between the second dust cover (2-914) and the driving shaft (2-8), a fifth sealing ring (2-916) is provided between the second bearing cover (2-99) and the sealing plate (2-96), and a sixth sealing ring (2-918) is provided between the second bearing cover (2-99) and the driving shaft (2-8).

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