All-position locking type high-temperature blind plate valve with sealing adjusting function

Abstract

The all-position locking type high-temperature blind plate valve with the sealing adjusting function comprises a valve body, a valve plate and a driving assembly, the valve body comprises a valve frame, a floating end flange assembly and a fixed end flange assembly, the floating end flange assembly and the fixed end flange assembly are installed at the front end and the rear end of the valve frame respectively, and the valve plate is arranged between the floating end flange assembly and the fixed end flange assembly. The floating end flange assembly is sequentially sleeved with a fixed disc, a rotating disc and a thrust disc from front to back, the fixed disc is fixedly connected with the valve frame, the rotating disc is connected with the fixed disc through threads, the thrust disc is embedded into the floating end flange assembly, a spacer bush is arranged between the thrust disc and the rotating disc, and an adjusting bolt is installed on the thrust disc. One end of the adjusting bolt abuts against the spacer bush; the driving assembly comprises a loosening and clamping execution assembly and a walking execution assembly. By adjusting the abutting degree between the adjusting bolt and the spacer bush, compensation adjustment of circumferential sealing force is achieved.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a full-position locking high-temperature blind valve with sealing and regulating function. Background Technology

[0002] In the petroleum and chemical industries, such as petrochemical oil and gas pipelines and maleic anhydride unit pipelines, blind flanges or blind valves are often required due to process conditions. Currently, the blind valve configuration rate in these industries is low, and the matching degree with process media is not high. Especially in large-diameter pipelines under high-risk media conditions, blind flanges still need to be replaced manually, which is inefficient and has a high risk factor.

[0003] Due to factors such as thermal deformation, the valve frame of existing blind valves has sealing weaknesses in the circumferential area of ​​the sealing surface, and the moving parts are prone to buckling during expansion and contraction, which affects the actual sealing effect. Utility Model Content

[0004] To address the aforementioned problems, this utility model proposes a full-position locking high-temperature blind valve with sealing adjustment function, aiming to improve sealing performance. The specific technical solution is as follows:

[0005] A full-position locking high-temperature blind flange valve with sealing adjustment function includes a valve body, a valve plate, and a drive assembly. The valve body includes a valve frame, a floating end flange assembly and a fixed end flange assembly respectively installed at the front and rear ends of the valve frame. The valve plate is located between the floating end flange assembly and the fixed end flange assembly. A fixed plate, a rotating plate, and a thrust plate are sequentially fitted on the outside of the floating end flange assembly from front to back. The fixed plate is fixedly connected to the valve frame, and the rotating plate is connected to the fixed plate by a thread. The thrust plate is embedded in the floating end flange assembly. A spacer is provided between the thrust plate and the rotating plate. An adjusting bolt is installed on the thrust plate, and one end of the adjusting bolt abuts against the spacer. The drive assembly includes a release clamping actuator and a travel actuator. The release clamping actuator can drive the rotating plate to push the floating end flange assembly to extend and retract along the flow channel axially, and the travel actuator can drive the valve plate to travel in a direction perpendicular to the flow channel.

[0006] Furthermore, the thrust plate includes a split ring, a locking ring, a locking bolt, and an adjusting bolt. The locking ring is located between the split ring and the spacer. The split ring is embedded in the floating end flange assembly. The split ring and the locking ring are fixedly connected by the locking bolt. The end of the adjusting bolt abuts against the spacer.

[0007] Furthermore, a back-tightening nut is also installed on the adjusting bolt.

[0008] Furthermore, the outer circumference of the rotary disk is provided with a swing arm ring, and the release clamping actuator drives the rotary disk to rotate through the swing arm ring.

[0009] Furthermore, it also includes a bracket, which includes a support plate located on the underside of the thrust plate. The support plate is in smooth contact with the thrust plate, and the support plate is fixedly connected to the valve frame via a vertical plate located on its underside.

[0010] Furthermore, the floating end flange assembly includes a first connecting flange, a bellows, and a pressure plate arranged sequentially from front to back, and the fixed end flange assembly includes a second connecting flange and a fixed valve seat arranged sequentially from back to front, with a valve plate arranged between the pressure plate and the fixed valve seat.

[0011] The beneficial effects of this utility model are as follows:

[0012] 1. With the rotation of the fixed plate and the rotating plate, the rotating plate abuts against the thrust plate, thereby causing the floating end flange assembly to press against the valve plate, achieving a seal between the floating end flange assembly and the valve plate. By setting the adjusting bolt, the degree of contact between the adjusting bolt and the spacer can be adjusted to achieve local compensation adjustment of the axial sealing force.

[0013] 2. A bracket is installed to support the thrust plate that moves axially along the flow channel, providing stable support, ensuring smooth movement, and improving the uniformity of the sealing surface compression. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of the all-position locking high-temperature blind valve described in this utility model;

[0016] Figure 2 This is a half-sectional view of the all-position locking high-temperature blind valve described in this utility model;

[0017] Figure 3 This is a cross-sectional view of the all-position locking high-temperature blind valve described in this utility model;

[0018] Figure 4 This is a cross-sectional view of the thrust disc described in this utility model. Figure 1 ;

[0019] Figure 5 This is a cross-sectional view of the thrust disc described in this utility model. Figure 2 ;

[0020] Figure 6 This is a schematic diagram of the structure of the bracket described in this utility model;

[0021] Figure 7 This is a schematic diagram of the valve plate described in this utility model.

[0022] In the diagram: 1. Valve body; 11. Valve frame; 111. Front frame plate; 112. Rear frame plate; 113. Side plate; 114. Connecting shaft; 1141. Middle connecting shaft; 1142. Side connecting shaft; 115. Nut; 116. Fork; 117. Support roller; 12. Floating end flange assembly; 121. First connecting flange; 122. Bellows; 123. Pressure plate; 1231. Outer convex ring; 12311. Boss side end face; 13. Fixed end flange assembly; 131. Second connecting flange; 132. Fixed valve seat; 14. Fixed plate; 141. Large outer diameter section; 142. Small outer diameter section; 15. Rotary plate; 151. Small inner diameter section; 1 511. Inner end face; 16. Thrust plate; 161. Split ring; 1611. Through hole; 1612. Countersunk hole; 162. Locking ring; 1621. Adjusting screw hole; 1622. Locking screw hole; 163. Locking bolt; 164. Adjusting bolt; 165. Back tightening nut; 17. Swing arm ring; 18. Spacer; 19. Bracket; 191. Sleeve; 1911. Top screw hole; 192. Vertical plate; 193. Support plate; 2. Valve plate; 21. Through ring; 22. Blind plate; 23. Rectangular outer frame; 231. Groove; 232. Limiting block; 24. Rack; 3. Drive assembly; 31. Loosening and clamping actuator assembly; 32. Travel actuator assembly. Detailed Implementation

[0023] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0024] The present invention provides the following specific implementation scheme:

[0025] like Figure 1-7As shown, this utility model provides a full-position locking high-temperature blind plate valve with sealing adjustment function, including a valve body 1, a valve plate 2, and a drive assembly 3. The valve body 1 includes a valve frame 11, a floating end flange assembly 12 and a fixed end flange assembly 13 respectively installed at the front and rear ends of the valve frame 11. The valve plate 2 is disposed between the floating end flange assembly 12 and the fixed end flange assembly 13. A fixed plate 14, a rotating plate 15, and a thrust plate 16 are sequentially sleeved on the outside of the floating end flange assembly 12 from front to back. The fixed plate 14 is fixedly connected to the valve frame 11, and the rotating plate 15... The thrust plate 16 is embedded in the floating end flange assembly 12 and is connected to the fixed plate 14 by a thread. A spacer 18 is provided between the thrust plate 16 and the rotating plate 15. An adjusting bolt 164 is installed on the thrust plate 16, and one end of the adjusting bolt 164 abuts against the spacer 18. The drive assembly 3 includes a release clamping actuator 31 and a travel actuator 32. The release clamping actuator 31 can drive the rotating plate 15 to push the floating end flange assembly 12 to extend and retract along the flow channel axial direction. The travel actuator 32 can drive the valve plate 2 to travel in a direction perpendicular to the flow channel.

[0026] Furthermore, the valve frame 11 is an integral assembly structure, mainly composed of a front frame plate 111, a rear frame plate 112, a side plate 113, and several connecting shafts 114. The connecting shafts 114 are engaged with corresponding holes on the front frame plate 111 and the rear frame plate 112, and are locked on the outside by nuts 115. The side plates 113 are installed on the sides of the front frame plate 111 and the rear frame plate 112 to form a frame structure, providing an installation base for other components.

[0027] Furthermore, the floating end flange assembly 12 is fixedly connected to the front frame plate 111. The floating end flange assembly 12 includes a first connecting flange 121, a bellows 122, and a pressure plate 123 arranged sequentially from front to back, and the three are connected by welding. The fixed end flange assembly 13 is fixedly connected to the rear frame plate 112. The fixed end flange assembly 13 includes a second connecting flange 131 and a fixed valve seat 132 arranged sequentially from back to front, and the two are connected by welding. The valve plate 2 is arranged between the pressure plate 123 and the fixed valve seat 132.

[0028] Furthermore, the fixed disk 14 includes a large outer diameter section 141 and a small outer diameter section 142 arranged from front to back. The large outer diameter section 141 is fixedly connected to the front frame plate 111 by bolts, and the small outer diameter section 142 is provided with external threads. The rotating disk 15 includes a large inner diameter section and a small inner diameter section 151. The large inner diameter section is provided with internal threads. The large inner diameter section of the rotating disk 15 and the small outer diameter section 142 of the fixed disk 14 are threadedly connected. Under the action of spiral rotation, the rotating disk 15 can extend and retract along the direction of the flow channel axis.

[0029] Furthermore, an outer protruding ring 1231 is provided at the end where the pressure plate 123 connects to the bellows 122. An anti-rotation key is provided between the outer protruding ring 1231 and the fixed plate 14 to prevent relative rotation between the pressure plate 123 and the valve plate 2. The outer protruding ring 1231 is located inside the large inner diameter section of the rotating plate 15. When the rotating plate 15 moves towards the fixed plate 14, the inner end face 1511 of the small inner diameter section 151 of the rotating plate 15 fits against the boss side end face 12311 of the outer protruding ring 1231 away from the bellows 122, causing the rotating plate 15 to hook the pressure plate 123, driving the pressure plate 123 to move towards the front frame plate 111 and thus disengage from the valve plate 2.

[0030] Furthermore, the thrust plate 16 includes a split ring 161, a locking ring 162, a locking bolt 163, and an adjusting bolt 164. The locking ring 162 is located between the split ring 161 and the spacer 18. The spacer 18 is fitted over the pressure plate 123, and an anti-rotation key is provided between them. The spacer 18 can move along the flow channel axis. A large gap is maintained between the inner side of the spacer 18 and the pressure plate 123. To ensure the radial position of the spacer 18, a boss is provided on the side of the spacer 18 near the locking ring 162. This boss is embedded in the locking ring. In ring 162, the split ring 161 is embedded in the pressure plate 123. The split ring 161 has through holes 1611 and countersunk holes 1612 staggered along the circumference. The locking ring 162 has adjusting screw holes 1621 and locking screw holes 1622 staggered along the circumference. The split ring 161 and the locking ring 162 are fixedly connected by a locking bolt 163 passing through the countersunk holes 1612 and locking screw holes 1622. The screw end of the adjusting bolt 164 passes through the through hole 1611 and adjusting screw hole 1621 and abuts against the spacer 18. When the adjusting bolt 164 is screwed in, the adjusting bolt 164 first tightens the spacer 18. As the adjusting bolt 164 is continuously screwed in, it outputs a reverse pushing force, which in turn pushes the pressure plate 123 to continuously clamp the valve plate 2, thereby realizing the local adjustment of the sealing force. An anti-rotation key is provided between the locking ring 162, the spacer 18 and the pressure plate 123. When the rotating disk 15 moves away from the fixed disk 14, the outer end face of the small inner diameter section 151 of the rotating disk 15 is pressed against the spacer 18, thereby pushing the thrust disk 16 to drive the pressure disk 123 to move towards the fixed valve seat 132, thereby clamping the valve plate 2.

[0031] Furthermore, a back-tightening nut 165 is also installed on the adjusting bolt 164 to lock the position of the adjusting bolt 164 relative to the thrust plate 16.

[0032] Furthermore, the valve body 1 is also provided with a bracket 19, which includes a support plate 193. The support plate 193 is located on the lower side of the thrust plate 16 and has smooth contact with the thrust plate 16. A vertical plate 192 is provided on the lower side of the support plate 193. A sleeve 191 is provided inside the vertical plate 192. The sleeve 191 is provided on two central connecting shafts 1141 located in the middle of the lower side through a set screw hole 1911.

[0033] Furthermore, the valve plate 2 is welded together from a rectangular outer frame 23, a through ring 21, and a blind plate 22. The blind plate 22 can be an integral plate or welded together from the through ring 21, the blind plate, and the stiffener. A groove 231 is provided on the top of the rectangular outer frame 23, and a rack 24 is built into the groove 231. Through the gear and rack 24 engagement, the valve plate 2 can move along the direction of the vertical flow channel under the drive of the walking actuator 32.

[0034] Furthermore, the valve plate 2 is provided with sealing grooves (usually annular) on the annular surfaces of the corresponding pressure plate 123 and the fixed valve seat 132. The sealing element is embedded in the sealing groove. The sealing groove can be set as a rectangular groove, dovetail groove, or ring connection surface type, etc., depending on the type of sealing element used. Under the premise of meeting the valve performance, the sealing element in the sealing groove can fully consider the sealing gasket type of various materials (such as rubber gasket, metal gasket, metal + non-metal composite gasket, etc.) to achieve soft, hard and other types of sealing. The gasket can be matched according to the characteristics of the medium, and the adaptability is higher.

[0035] Furthermore, the front frame plate 111 and the rear frame plate 112 are connected by multiple connecting shafts 114. In this embodiment, there are a total of 8 connecting shafts, four at the top and four at the bottom. Among them, a compression spring and a shift fork 116 are provided on the central connecting shaft 1141 near the center of the valve frame 11. The compression spring and the shift fork 116 are sleeved on the central connecting shaft 1141. The shift fork has a sleeve-shaped structure, which is sleeved on the outside of the compression spring and has an inner stop at one end. The compression spring is installed in a pre-compressed state and is compressed a second time during the clamping process of the valve plate 2. The pressure point of one end of the compression spring is the rear frame plate 112, and the pressure point of the other end is the inner stop of the shift fork 116. A pawl is provided on the outer circumference of the shift fork 116, and a guide groove is formed between the two pawls. Self-lubricating plates are installed on the inner walls of both sides of the guide groove to provide a low-resistance guiding function for the movement of the valve plate 2.

[0036] Furthermore, the rectangular outer frame 23 of the valve plate 2 is located in the guide groove. After the release clamping actuator 31 executes the release command, the pressure plate 123 no longer provides clamping force to the valve plate 2. At this time, the internal force of the compression spring will be released, pushing the shift fork 116 to move along the axis of the connecting shaft, thereby pushing away the valve plate 2, so that the valve plate 2 and the fixed valve seat 132 maintain a certain gap, thereby ensuring that the valve plate 2 moves smoothly, while protecting the sealing surface and sealing elements on the valve plate 2.

[0037] Furthermore, a limiting block 232 is set on the outer frame of the valve plate 2 along the travel trajectory of the valve plate 2. After the valve plate 2 moves to the target position under the drive of the travel execution component 32, the limiting block 232 contacts the paddle in the fork 116 to limit the travel position of the valve plate 2.

[0038] Furthermore, a supporting roller 117 is provided on the side connecting shaft 1142 located below the valve plate 2 to support the valve plate 2 and rotate synchronously when the valve plate 2 moves, thereby reducing the walking resistance; a straightening roller is provided on the side connecting shaft 1142 located above the valve plate 2 to prevent the valve plate 2 from tilting up when in the target position, thereby ensuring the smoothness of the starting stage of the walking process.

[0039] Furthermore, the release clamping actuator 31 is mounted on the bracket and includes an electric actuator, a lead screw, and a slider. The electric actuator outputs torque and transmits it through the lead screw. The lead screw is threadedly connected to the slider, which can drive the slider to move horizontally. Sliding shafts are provided on both sides of the slider, and rolling sleeves are provided on the sliding shafts. A sliding groove is provided on the side plate of the bracket. The sliding groove cooperates with the rolling sleeve to provide a low-resistance guiding function for the slider. Furthermore, an indicator plate is provided on the outside of the sliding groove for indicating the position of release or clamping.

[0040] Furthermore, the outer circumferential surface of the rotary disk 15 is provided with a swing arm ring 17. The swing arm ring 17 of the rotary disk 15 has an oblong hole. The swing arm ring 17 is connected to the sliding shaft on the slider through the oblong hole. When the slider moves along the screw axis, it will push the swing arm ring 17 to swing, thereby converting the translational motion of the slider into the rotational motion of the rotary disk 15, and thus realizing the extension and retraction of the pressure plate 123 along the flow channel axis.

[0041] Furthermore, the walking execution component 32 includes an electric device, a gear shaft, and a gear. The electric device outputs torque to drive the gear shaft to rotate, and then the gear meshes with the rack 24 on the valve plate 2 to realize the translational movement of the valve plate 2. In particular, the rotation center of the gear shaft is eccentrically arranged with respect to the mounting center, which is used to adjust the tooth backlash of the gear rack 24, thereby indirectly compensating for the micro-deformation caused by temperature changes or other factors, and ensuring the smoothness of the walking process.

[0042] In use, the fixed plate 14, rotating plate 15, and thrust plate 16 are first fitted onto the outside of the pressure plate 123 of the floating end flange assembly 12. Then, the fixed end flange assembly 13 and the floating end flange assembly 12 are installed on the valve frame 11. The fixed plate 14 and the fixed end flange assembly 13 are connected to the valve frame 11 to form a whole. The position of the adjusting bolt 164 is adjusted to adjust the sealing pressure between the pressure plate 123 and the valve plate 2. When the valve state is switched, the clamping actuator 31 is released to drive the rotating plate 15 to rotate. When the rotating plate 15 moves, it pushes the thrust plate 16 or the barbed pressure plate 123 to realize the extension and retraction of the pressure plate 123 along the flow channel axis, pressing or moving away from the valve plate 2, thereby realizing the clamping and releasing of the valve plate 2. The valve plate 2 is driven by the traveling actuator 32 to realize the switching between the valve plate 2 through ring 21 and the blind plate 22.

[0043] The rotating disk 15, through the rotation of the fixed disk 14 and the rotating disk 15, abuts against the thrust disk 16, thereby causing the floating end flange assembly 12 to press against the valve plate 2, achieving a seal between the floating end flange assembly 12 and the valve plate 2. By setting the adjusting bolt 164, the degree of contact between the adjusting bolt 164 and the spacer 18 can be adjusted, achieving local compensation adjustment of the axial sealing force. The bracket 19 supports the thrust disk 16, which moves axially along the flow channel, providing stable support, ensuring the smoothness of movement, and improving the uniformity of the sealing surface pressing.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A high-temperature blind valve with full-position locking mechanism and sealing adjustment function, characterized in that: The device includes a valve body, a valve plate, and a drive assembly. The valve body includes a valve frame, a floating end flange assembly and a fixed end flange assembly respectively installed at the front and rear ends of the valve frame, and a valve plate located between the floating end flange assembly and the fixed end flange assembly. A fixed plate, a rotating plate, and a thrust plate are sequentially fitted around the outside of the floating end flange assembly from front to back. The fixed plate is fixedly connected to the valve frame, and the rotating plate is connected to the fixed plate by threads. The thrust plate is embedded in the floating end flange assembly, and a spacer is provided between the thrust plate and the rotating plate. An adjusting bolt is installed on the thrust plate, and one end of the adjusting bolt abuts against the spacer. The drive assembly includes a release clamping actuator and a travel actuator. The release clamping actuator can drive the rotating plate to push the floating end flange assembly to extend and retract along the flow channel axially, and the travel actuator can drive the valve plate to travel in a direction perpendicular to the flow channel.

2. The high-temperature blind valve with full-position locking function and sealing adjustment function according to claim 1, characterized in that: The thrust plate includes a split ring, a locking ring, a locking bolt, and an adjusting bolt. The locking ring is located between the split ring and the spacer. The split ring is embedded in the floating end flange assembly. The split ring and the locking ring are fixedly connected by the locking bolt. The end of the adjusting bolt abuts against the spacer.

3. A full-position locking high-temperature blind valve with sealing adjustment function according to claim 2, characterized in that: A back-tightening nut is also installed on the adjusting bolt.

4. A high-temperature blind valve with full-position locking function and sealing adjustment function according to claim 1, characterized in that: The outer circumference of the rotary disk is provided with a swing arm ring, and the release clamping actuator drives the rotary disk to rotate through the swing arm ring.

5. A high-temperature blind valve with full-position locking function and sealing adjustment function according to claim 1, characterized in that: It also includes a bracket, which includes a support plate located on the underside of the thrust plate. The support plate is in smooth contact with the thrust plate and is fixedly connected to the valve frame via a vertical plate located on its underside.

6. A high-temperature blind valve with full-position locking function and sealing adjustment function according to claim 1, characterized in that: The floating end flange assembly includes a first connecting flange, a bellows, and a pressure plate arranged sequentially from front to back, and the fixed end flange assembly includes a second connecting flange and a fixed valve seat arranged sequentially from back to front, with a valve plate arranged between the pressure plate and the fixed valve seat.

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