Valve with wear compensation function

Abstract

The valve with the abrasion compensation function comprises a valve element rod and a valve element arranged on the lower side of the valve element rod and is characterized in that the outer side of the valve element is sleeved with a lining, the lining is a flexible and deformable lining, a deformation structure is arranged in the valve element, the size of the valve element can be changed through the deformation structure, and therefore the size of the lining can be changed; a bottom rod and a bottom plate are arranged in the valve element, and the compensation action is seamlessly embedded into the normal working cycle of the valve. Only when the valve is closed and the lining, the valve chip and the valve seat are in actual contact, compensation is authorized to be executed, and the accuracy and timeliness of compensation behaviors are ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valves, in particular to a valve with wear compensation function. BACKGROUND

[0002] Valves are key control components in fluid conveying systems, and their core function is to realize opening, closing and regulation. The sealing performance of the valve directly affects the safety, efficiency and economy of the system. In harsh working conditions such as coal chemical industry, ore slurry conveying, power plant ash removal, etc., the sealing pair between the valve core and the valve seat is prone to wear, resulting in an increase in the sealing gap and leakage of the medium. At present, most valves must be stopped for manual adjustment or replacement of parts after the sealing surface is worn, which not only reduces the utilization rate of the equipment, but also significantly increases the maintenance cost and time. A few valves with online compensation function often have complex compensation mechanisms, and the compensation behavior is mostly periodic manual intervention, which cannot realize real-time adaptive compensation during the wear process. SUMMARY

[0003] In order to solve the problems raised in the background art, a valve with wear compensation function is provided. The core design concept of the valve is to use its inherent opening and closing action as a trigger signal, so that the compensation operation is only activated when the seal needs to be established, thereby realizing efficient and accurate "on-demand compensation".

[0004] The valve with wear compensation function provided by the present application adopts the following technical scheme: A valve with wear compensation function, comprising a valve core rod and a valve core arranged on the lower side of the valve core rod, characterized in that: a gasket is sleeved on the outer side of the valve core, the gasket is a flexible deformable gasket, a deformation structure is arranged in the valve core, the size of the valve core can be changed through the deformation structure, so that the size of the gasket can be changed, and a bottom rod and a bottom plate are arranged in the valve core.

[0005] By adopting the above technical scheme, through the cooperative action of the flexible gasket and the built-in deformation structure, adaptive wear compensation can be realized. During operation, the deformation structure can actively adjust the size of the valve core to drive the gasket to expand and accurately fill the wear gap.

[0006] Optionally, the deformation structure comprises valve core pieces, the valve core pieces are a plurality of pieces, a connecting piece is arranged between adjacent two valve core pieces, and the two ends of the connecting piece are respectively connected in the adjacent two valve core pieces in a sliding manner.

[0007] By adopting the above technical scheme, the deformation structure is designed as a combination of a plurality of valve core pieces and a slidingly connected connecting piece, so that the size of the valve core can be controlled, adjusted accurately and uniformly.

[0008] Optionally, the inner side of the valve core piece is provided with a driving plate, the driving plate abuts against the valve core piece, and moving downward of the driving plate can make the valve core piece open.

[0009] By adopting the technical scheme, the complex radial expansion movement of the valve core is converted into unified axial linear driving, and efficient control of "one driving multiple" is realized.

[0010] Optionally, when the valve core is in the closed position, the force acting on the outer side of the valve core piece is smaller than the force acting on the inner side of the valve core piece.

[0011] By adopting the technical scheme, the valve core piece is prevented from being pushed by fluid during use, and the sealing effect of the valve is affected.

[0012] Optionally, the lower side of the driving plate is provided with a threaded cavity and a sliding rod, a screw rod is arranged in the threaded cavity and is in threaded connection with the threaded cavity, the lower end of the screw rod penetrates through the bottom plate and is provided with a driven column, and rotation of the driven column can drive the screw rod to rotate, so that the driving plate can be moved downward.

[0013] By adopting the technical scheme, the rotation movement input from the distal end is accurately and efficiently converted into linear displacement of the driving plate downward, directional and controllable transmission of movement and power can be realized, meanwhile, by means of the self-locking characteristics of the threaded pair, displacement backtracking of the driving plate possibly occurring in a fluid pressure or vibration environment is effectively eliminated, so that each compensation increment is firmly locked in place, and the persistence and reliability of the compensation effect are ensured.

[0014] Optionally, the driven column is driven through a hydraulic driving structure, the hydraulic driving structure comprises a hydraulic driver, the output end of the hydraulic driver is provided with a driving rod, and the side wall of the driven column is provided with a spiral chute, and the end portion of the driving rod is slidably connected in the spiral chute.

[0015] By adopting the technical scheme, the hydraulic driving cooperates with the spiral chute to realize efficient conversion of movement form and power transmission, and the strong linear thrust output by the hydraulic driver is smoothly converted into the required rotation movement of the driven column through cooperation of the driving rod and the spiral chute.

[0016] Optionally, a connecting rod is inserted between the valve core piece and the bottom rod, and the two ends of the connecting rod are slidably connected with the valve core piece and the bottom rod, respectively.

[0017] By adopting the technical scheme, the valve core piece is limited to accurately slide on the preset radial path, and inclination, jamming or non-synchronous movement of the valve core piece under complex stress is effectively prevented.

[0018] Optionally, the lower side of the driving plate is provided with a plurality of mounting holes, a guide rod is slidably connected in the mounting hole, the lower end of the guide rod is fixedly connected with the bottom plate, and the driving plate is provided with a driving spring between the bottom plate.

[0019] By adopting the technical scheme, the driving plate can be driven to move downward by the driving spring.

[0020] Optionally, the outer side wall of the driven column is provided with a clamping groove, the bottom plate is provided with a clamping block, and the end of the clamping block is provided with a thimble abutting against the clamping groove.

[0021] By adopting the technical scheme, the position of the driven column can be limited through the clamping of the clamping groove and the thimble.

[0022] Optionally, the clamping block and the bottom plate are rotationally connected through a rotating shaft, and a reset spring is arranged between the other end of the clamping block and the bottom plate.

[0023] By adopting the technical scheme, the clamping block can be reset through the reset spring.

[0024] Optionally, the bottom plate is slidably connected with an abutting rod, one end of the abutting rod abuts against the clamping block, and the other end of the abutting rod abuts against the valve core piece.

[0025] By adopting the technical scheme, when the valve core piece abuts against the valve seat, the valve core piece is driven to move under the action force to drive the abutting rod to move, the abutting rod abuts against the clamping block, so that the clamping block rotates along the rotating shaft, the thimble is separated from the clamping groove, so that the driven column is in a rotatable state, and compensation is facilitated. When the valve core piece is away from the valve seat, the thimble is clamped into the clamping groove under the action of the reset spring, so that the driven column is in a locked state, and compensation is avoided when the valve is not working.

[0026] In summary, the present application has at least one of the following beneficial technical effects: The compensation action is seamlessly embedded in the normal working cycle of the valve. Only when the valve is closed, the liner, the valve core piece and the valve seat are actually in contact, the compensation is authorized to be executed, and the accuracy and timeliness of the compensation behavior are ensured; The compensation can be automatically performed without human operation or instruction, and the compensation process is fully automatic, which greatly improves the user experience and reduces the operation threshold; The compensation action only occurs in an instant, and energy is not consumed for a long time. The mechanical locking mechanism is firmly locked during the non-working period, preventing any accidental and unnecessary compensation action, and ensuring the safety of the system. BRIEF DESCRIPTION OF DRAWINGS

[0027] Fig. 1 is a perspective view of the present application; Fig. 2 is a schematic view of the valve core piece structure of the present application; Fig. 3 This is a cross-sectional structural diagram of Embodiment 1 of the present invention; Fig. 4 This is a cross-sectional structural diagram of Embodiment 2 of the present invention; Fig. 5 This is a schematic diagram of the driven column structure of the present invention; Fig. 6 This is a partially enlarged structural diagram of point A in this invention.

[0028] Explanation of reference numerals in the attached figures: 1. Liner; 2. Valve core rod; 31. Valve chip; 32. Connecting piece; 4. Base rod; 5. Base plate; 61. Drive plate; 62. Threaded cavity; 63. Slide rod; 71. Hydraulic actuator; 72. Drive rod; 81. Driven column; 82. Spiral groove; 83. Slot; 9. Screw; 10. Connecting rod; 11. Abutment rod; 12. Guide rod; 13. Drive spring; 14. Snap block; 15. Return spring; 16. Rotating shaft; 17. Ejector pin. Detailed Implementation

[0029] The present application will be further described in detail below with reference to the accompanying drawings.

[0030] Example 1

[0031] like Figs. 1-3 As shown in Figure 5, this application discloses a valve with wear compensation function. The valve in this embodiment mainly consists of a valve core rod 2, a valve core, a liner 1, a bottom rod 4, and a bottom plate 5. The valve core is located at the lower end of the valve core rod 2, and the flexible liner 1 (such as polyurethane or ultra-high molecular weight polyethylene) is tightly fitted around the valve core. The core of the valve core is a deformation mechanism and a hydraulic drive system. The deformation structure is formed by multiple arc-shaped valve chips 31 arranged circumferentially. Adjacent valve chips 31 are movably connected by connecting pieces 32. The two ends of the connecting pieces 32 are embedded in the guide grooves on the inner side of the valve chips 31, which allows the valve chips 31 to slide in the radial direction. The inner curved surface of the valve chips 31 is in contact with the upper surface of the drive plate 61. In addition, the valve chips 31 are connected to the fixed bottom rod 4 by connecting rod 10. This design ensures that all valve chips 31 can move synchronously during expansion and maintain roundness. A threaded cavity 62 is machined in the lower center of the drive plate 61. A matching screw 9 is screwed into the threaded cavity 62. The lower end of the screw 9 passes through the base plate 5 and is fixedly connected to a driven post 81. One or more continuous spiral grooves 82 are formed on the cylindrical surface of the driven post 81.

[0032] The hydraulic actuator 71 is fixedly mounted. The end of its output drive rod 72 is equipped with a bearing or slider, which is precisely nested within the helical groove 82 of the driven rod 81.

[0033] After the valve is first installed or overhauled, high pressure oil is injected into the oil chamber of the hydraulic driver 71 and sealed, making it a constant pressure accumulator. This means that the driving plate 61 is always under a stable downward hydraulic force, and the system is ready for compensation at any time.

[0034] On the circumferential surface of the driven column 81, evenly distributed clamping grooves 83 are machined. A clamping block 14 is hinged to the base plate 5 through a rotating shaft 16. One end of the clamping block 14 is equipped with a ejector pin 17 that can engage with the clamping grooves 83, and the other end is in contact with a slideable abutting rod 11. The other end of the abutting rod 11 abuts against the inner side of one of the valve core pieces 31. A return spring 15 continuously applies torque to the clamping block 14, trying to keep the ejector pin 17 in the clamping grooves 83, which is the locked state; The valve core is separated from the valve core rod 2 under the lifting of the valve core rod 2. At this time, the outer side of the valve core piece 31 is no longer subjected to the reaction force of the valve core, so the abutting rod 11 is not pushed. Under the action of the return spring 15, the ejector pin 17 of the clamping block 14 is firmly clamped into the clamping grooves 83 of the driven column 81. The driven column 81 cannot rotate, and although the hydraulic driver 71 provides continuous downward pressure, the driving plate 61 and the entire compensation mechanism are mechanically locked, and the system is quietly on standby; The operator drives the valve core rod 2 to move downward, and the entire valve core descends until the outer side gasket 1 contacts and is compacted with the valve seat.

[0035] The valve seat generates a radial reaction force directed towards the center of the valve core piece 31 and the gasket 1. This force is transmitted to the abutting rod 11 through the valve core piece 31.

[0036] The abutting rod 11 is laterally displaced under the force, and its other end pushes the clamping block 14 to rotate around the rotating shaft 16 against the force of the return spring 15.

[0037] The rotation of the clamping block 14 causes the ejector pin 17 to be pulled out of the clamping grooves 83 of the driven column 81, and the lock is released; As soon as the lock is released, the pressure stored in the hydraulic driver 71 can be released instantly. The high-pressure oil pushes the driving rod 72 to move linearly. Since the sliding block at the end of the driving rod 72 is limited by the spiral slide 82, the linear advancement of the driving rod 72 forces the driven column 81 to rotate.

[0038] The rotation of the driven column 81 drives the screw rod 9 fixed thereto to rotate.

[0039] Since the driving plate 61 is limited from rotating by the guide rod 12, according to the principle of screw transmission, the rotation of the screw rod 9 is converted into the linear movement of the driving plate 61 downward.

[0040] The driving plate 61 moves downward, and its inclined upper surface presses the valve core piece 31, forcing it to slide and expand robustly to the radial outside along the constraints of the connecting piece 32 and the connecting rod 10.

[0041] The expansion of the valve chip directly compresses the flexible liner 1, causing it to undergo additional radial deformation, tightly filling the gaps created by wear, and restoring the seal.

[0042] Once the liner expands to fully fit the valve seat, the frictional force and the internal force of the system reach a new balance, and the compensation action naturally stops. When the valve needs to be opened again, the valve core rod 2 is lifted, and the valve core separates from the valve seat. The radial force acting on the valve core 31 and the abutment rod 11 immediately disappears.

[0043] Under the restoring force of the return spring 15, the locking block 14 rotates rapidly, and its ejector pin 17 re-engages into the slot 83 where the driven post 81 is currently located, and the system re-enters the locked state.

[0044] Example 2

[0045] At least one pre-compressed drive spring is installed between the drive plate 61 and the base plate 5. The drive spring is compressed during valve assembly, storing sufficient elastic potential energy, and is always ready to push the drive plate 61 downward.

[0046] Its locking and triggering mechanism is exactly the same as that of Embodiment 1. It also relies on the radial force on the valve chip 31 when the valve is closed to trigger the abutment rod 11, thereby unlocking the driven column 81. Once unlocked, the drive spring directly pushes the drive plate 61 to perform compensation without any hydraulic conversion.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A valve with wear compensation function, comprising a valve core rod (2) and a valve core disposed on the lower side of the valve core rod (2), characterized in that, A liner (1) is sleeved on the outside of the valve core. The liner (1) is a flexible and deformable liner. The valve core is provided with a deformation structure. The size of the valve core can be changed by the deformation structure, thereby changing the size of the liner. The valve core is provided with a bottom rod (4) and a bottom plate (5).

2. A valve with wear compensation function according to claim 1, characterized in that, The deformable structure includes valve chips (31), which are several pieces. A connecting piece (32) is provided between two adjacent valve chips (31), and the two ends of the connecting piece (32) are slidably connected to the two adjacent valve chips (31).

3. A valve with wear compensation function according to claim 2, characterized in that, The valve chip (31) is provided with a drive plate (61) on its inner side. The drive plate (61) abuts against the valve chip (31). The valve chip (31) can be opened by moving the drive plate (61) downward.

4. A valve with wear compensation function according to claim 3, characterized in that, When the valve core is in the closed position, the force on the outside of the valve core (31) is less than the force on its inside.

5. A valve with wear compensation function according to claim 4, characterized in that, The drive plate (61) has a threaded cavity (62) and a slide rod (63) on its lower side. The threaded cavity (62) is provided with a screw (9), which is threadedly connected to the threaded cavity (62). The lower end of the screw (9) passes through the base plate (5) and is provided with a driven post (81). The rotation of the driven post (81) can drive the screw (9) to rotate, thereby driving the drive plate (61) to move downward.

6. A valve with wear compensation function according to claim 5, characterized in that, The driven column (81) is driven by a hydraulic drive structure, which includes a hydraulic actuator (71). The output end of the hydraulic actuator (71) is provided with a drive rod (72). The side wall of the driven column (81) is provided with a spiral groove (82). The end of the drive rod (72) is slidably connected in the spiral groove (82).

7. A valve with wear compensation function according to claim 2, characterized in that, A connecting rod (10) is inserted between the valve chip (31) and the bottom rod (4), and the two ends of the connecting rod (10) are slidably connected between the valve chip (31) and the bottom rod (4).

8. A valve with wear compensation function according to claim 7, characterized in that, The drive plate (61) has several mounting holes on its lower side. A guide rod (12) is slidably connected in the mounting holes. The lower end of the guide rod (12) is fixedly connected to the base plate (5). A drive spring is provided between the drive plate (61) and the base plate (5).

9. A valve with wear compensation function according to claim 6, characterized in that, The outer side wall of the driven column (81) is provided with a slot (83), and the bottom plate (5) is provided with a snap block (14). The end of the snap block (14) is provided with a pin (17) that abuts against the slot (83).

10. A valve with wear compensation function according to claim 9, characterized in that, The snap-fit ​​block (14) is rotatably connected to the base plate (5) via a rotating shaft (16). A reset spring (15) is provided between the other end of the snap-fit ​​block (14) and the base plate (5). The base plate (5) is slidably connected to an abutment rod (11). One end of the abutment rod (11) abuts against the snap-fit ​​block (14), and the other end abuts against the valve chip (31).

Images