Mechanical locking device for spherical valve

Abstract

The utility model discloses a mechanical locking device for a spherical valve, and relates to the technical field of power station water inlet ball valve maintenance, in particular to the mechanical locking device for the spherical valve, which comprises a sealing cap, a sleeve and a locking rod, the locking rod is slidably sleeved in the sleeve, a wedge-shaped lock head is arranged at the locking end of the locking rod, the sealing cap is detachably arranged at the end part of the sleeve, and the sealing cap is detachably arranged at the end part of the sleeve. The sealing structure has the advantages that the firmness and the reliability of the sealing structure can be obviously improved by adopting the large-diameter pin shaft. According to the design, the stability of the structure is enhanced, and the loosening risk caused by vibration or pressure change is reduced. The locking rod is designed to be detachable, so that the locking rod is convenient to mount and replace and can be quickly detached during maintenance, and the maintenance cost and time are greatly saved. Due to the design of the wedge-shaped structure, the overhaul sealing ring can be effectively locked, and therefore good sealing performance is guaranteed. The structure can be kept stable when bearing high pressure, and leakage is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of maintenance of water inlet ball valves for power stations, in particular to a mechanical locking device for ball valves. Background Art

[0002] In the field of turbine sealing rings, traditional locking rods have certain limitations. For example, the diameter of the axial locking rod is limited and cannot be too large, otherwise it will cause installation difficulties and increase costs. In addition, this locking method is prone to problems such as sticking, bending, and tension, which affect the sealing effect and the normal operation of the equipment.

[0003] The L-shaped, split axial lock spindles commonly used in pumped storage units also present some issues. Once the two wedge-shaped surfaces disengage, they are difficult to re-engage, potentially leading to water leakage. Furthermore, they are difficult to maintain and replace. Replacement of the small axial shaft is particularly complex and inconvenient. Utility Model Content

[0004] The utility model aims to provide a mechanical locking device for a spherical valve in order to solve the above-mentioned problems.

[0005] The technical solution adopted by the utility model is as follows: a mechanical locking device for a spherical valve, comprising: a sealing cap, a sleeve and a locking rod, a locking rod slidably sleeved in the sleeve, a wedge-shaped locking head being provided at the locking end of the locking rod, and a sealing cap being detachably arranged at the end of the sleeve for limiting the sliding of the locking rod.

[0006] Furthermore, the sleeve includes an upper sleeve and a lower sleeve, and the upper sleeve and the lower sleeve are detachably connected.

[0007] Furthermore, the inner diameter of the upper sleeve matches the outer diameter of the locking rod, and the inner diameter of the lower sleeve is slightly larger than the inner diameter of the upper sleeve.

[0008] Furthermore, the locking rod sleeve is provided with a limit block, and the outer diameter of the limit block matches the inner diameter of the lower sleeve.

[0009] Furthermore, a reinforcing retaining ring is provided at the connection between the upper sleeve and the lower sleeve.

[0010] Furthermore, the wedge-shaped lock head includes a limiting portion and a wedge-shaped portion, and the outer diameter of the limiting portion matches the inner diameter of the sleeve.

[0011] Furthermore, the cross section of the wedge-shaped portion is set to a right-angled trapezoid, and the surface where the long hypotenuse of the trapezoid is located is used to achieve the bevel locking function.

[0012] Furthermore, the sealing cap is provided with an internal thread, and the end of the sleeve is provided with an external thread matching the internal thread.

[0013] Furthermore, a fixing screw is provided at one end of the locking rod, and the outer diameter of the fixing screw is smaller than the outer diameter of the locking rod.

[0014] Furthermore, the sealing cap is provided with a locking hole matching the fixing screw.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0016] By using a large diameter pin, the robustness and reliability of the seal structure can be significantly improved. This design not only enhances structural stability but also reduces the risk of loosening due to vibration or pressure changes.

[0017] The locking rod is designed to be detachable, which is not only convenient for installation and replacement, but also can be quickly disassembled during maintenance, greatly saving maintenance costs and time.

[0018] The wedge-shaped design allows the inspection seal ring to be locked effectively, thus ensuring good sealing performance. This structure can also remain stable under high pressure to prevent leakage.

[0019] Compared with the traditional axial locking spindle, the locking spindle device of this design is less prone to water leakage, and the maintenance and replacement process is simpler, reducing maintenance difficulty and cost.

[0020] Because the bevel design of the locking rod matches the bevel groove of the inspection seal ring, it can maintain a firm connection even under extreme working conditions, enhancing the safety of the system.

[0021] This structure is suitable for ball valves of different sizes and types, has strong versatility and adaptability, and can be widely used in various industrial scenarios.

[0022] The locking lever can be installed and removed in simple steps. The operation process is simple and intuitive, and even non-professionals can quickly master it. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of the utility model.

[0024] Figure 2 This is a schematic cross-sectional view of the sleeve of the utility model.

[0025] Figure 3 This is a top view of the sealing cap of the utility model.

[0026] Markings in the figure: 101-sealing cap, 102-sleeve, 103-locking rod, 104-wedge-shaped lock, 105-upper sleeve, 106-lower sleeve, 107-limiting block, 108-reinforcement retaining ring, 109-directional groove, 110-limiting part, 111-wedge-shaped part, 112-fixing screw, 113-locking hole. DETAILED DESCRIPTION

[0027] The present invention will be described in detail below with reference to the accompanying drawings.

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] In this embodiment, if Figure 1 、 2 As shown, a mechanical locking device for a spherical valve includes: a sealing cap 101, a sleeve 102 and a locking rod 103. The locking rod 103 is slidably sleeved in the sleeve 102, and a wedge-shaped lock head 104 is provided at the locking end of the locking rod 103. The sealing cap 101 is detachably provided at the end of the sleeve 102 to limit the sliding of the locking rod 103.

[0030] Currently, the main water inlet valve maintenance seals at hydropower stations are equipped with mechanical locking devices. During unit maintenance, after the main water inlet valve maintenance seal is deployed, the locking devices must be fully deployed to ensure that the main water inlet valve can reliably isolate the upstream water source. After the unit maintenance is completed, before the main water inlet valve maintenance seal is withdrawn, the mechanical locking devices must be fully withdrawn. This makes the maintenance process too cumbersome and prone to safety accidents.

[0031] In this embodiment, when the mechanical locking device is in use, the locking rod 103 is inserted into the sleeve 102, and a sealing cap 101 is provided at the upper end of the sleeve 102 to limit the movement of the locking rod 103. A wedge-shaped lock head 104 is provided at the locking end to abut against the maintenance sealing ring, so that the radial thrust of the valve body is converted into the axial thrust, thereby realizing the sealing or unlocking state of the maintenance sealing ring; this design makes the maintenance and replacement of the locking rod 103 simple and quick, greatly improves the maintenance efficiency, and saves costs.

[0032] Furthermore, the sleeve 102 includes an upper sleeve 105 and a lower sleeve 106 , and the upper sleeve 105 and the lower sleeve 106 are detachably connected.

[0033] The detachable connection of the upper and lower housings 105 and 106 allows for partial replacement or repair without moving the entire device, which not only improves maintenance efficiency but also reduces equipment downtime and maintenance costs.

[0034] Furthermore, the inner diameter of the upper sleeve 105 matches the outer diameter of the locking rod 103 , and the inner diameter of the lower sleeve 106 is slightly larger than the inner diameter of the upper sleeve 105 .

[0035] The inner diameter of the upper sleeve 105 matches the outer diameter of the locking rod 103, and the inner diameter of the lower sleeve 106 is slightly larger than the inner diameter of the upper sleeve 105, which ensures the smooth sliding of the locking rod 103 in the sleeve 102, avoids excessive looseness or overtightening, and ensures the reliability of the equipment.

[0036] Furthermore, the locking rod 103 is sleeved with a limit block 107 , and the outer diameter of the limit block 107 matches the inner diameter of the lower sleeve 106 .

[0037] The design of the stop block 107 on the locking rod 103 prevents the locking rod 103 from coming out of the sleeve 102, thereby enhancing the safety of the device. This design also simplifies the installation and positioning process of the locking rod 103.

[0038] Furthermore, a reinforcing retaining ring 108 is provided at the connection between the upper sleeve 105 and the lower sleeve 106 .

[0039] A reinforcing retaining ring 108 is provided at the connection between the upper sleeve 105 and the lower sleeve 106 to provide additional support for the limit block 107, thereby preventing the sleeve 102 from deforming or breaking under high pressure conditions, thereby enhancing the durability and safety of the equipment.

[0040] Furthermore, the wedge-shaped locking head 104 includes a limiting portion 110 and a wedge-shaped portion 111 , and the outer diameter of the limiting portion 110 matches the inner diameter of the sleeve 102 .

[0041] The wedge-shaped lock head 104 includes a limiting portion 110 and a wedge-shaped portion 111, wherein the outer diameter of the limiting portion 110 matches the inner diameter of the sleeve 102. This design makes the locking more stable, and is easy to install and remove, thereby improving the convenience of operation.

[0042] Furthermore, the cross section of the wedge-shaped portion 111 is configured as a right-angled trapezoid, and the surface where the long hypotenuse of the trapezoid is located is used to achieve a bevel locking function.

[0043] The cross section of the wedge-shaped portion 111 is set to a right-angled trapezoid, and the surface where the long oblique side is located is used to realize the oblique locking function. This design optimizes the distribution of force, improves the locking effect, and ensures the sealing performance.

[0044] Furthermore, the sealing cap 101 is provided with an internal thread, and the end of the sleeve 102 is provided with an external thread matching the internal thread.

[0045] The sealing cap 101 is connected to the end of the sleeve 102 via internal and external threads, providing a simple and reliable fixing method. It also facilitates future maintenance and replacement, thereby improving the maintainability of the equipment.

[0046] Furthermore, a fixing screw 112 is provided at one end of the locking rod 103 , and the outer diameter of the fixing screw 112 is smaller than the outer diameter of the locking rod 103 .

[0047] One end of the locking rod 103 is provided with a fixing screw 112, the outer diameter of which is smaller than the outer diameter of the locking rod 103. This design enables the locking rod 103 to be quickly connected or disconnected with the ball valve, simplifies the operation process, and improves work efficiency.

[0048] Furthermore, the sealing cap 101 is provided with a locking hole 113 matching the fixing screw 112 .

[0049] The sealing cap 101 is provided with a locking hole 113 that matches the fixing screw 112, further ensuring the stability and safety of the locking rod 103 during operation. This design prevents the locking rod 103 from accidentally moving or falling off under high pressure environments.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A mechanical locking device for a ball valve, characterized in that: include: A sealing cap (101), a sleeve (102) and a locking rod (103); the locking rod (103) is slidably sleeved in the sleeve (102); a wedge-shaped lock head (104) is provided at the locking end of the locking rod (103); the sealing cap (101) is detachably provided at the end of the sleeve (102) for limiting the sliding of the locking rod (103).

2. A mechanical locking device for a ball valve according to claim 1, characterized in that: The sleeve (102) comprises an upper sleeve (105) and a lower sleeve (106), and the upper sleeve (105) and the lower sleeve (106) are detachably connected.

3. A mechanical locking device for a ball valve according to claim 2, characterized in that: The inner diameter of the upper sleeve (105) matches the outer diameter of the locking rod (103), and the inner diameter of the lower sleeve (106) is slightly larger than the inner diameter of the upper sleeve (105).

4. A mechanical locking device for a ball valve according to claim 3, characterized in that: The locking rod (103) is sleeved with a limit block (107), and the outer diameter of the limit block (107) matches the inner diameter of the lower sleeve (106).

5. A mechanical locking device for a ball valve according to claim 2, characterized in that: A reinforcing retaining ring (108) is provided at the connection between the upper sleeve (105) and the lower sleeve (106).

6. A mechanical locking device for a ball valve according to claim 1, characterized in that: The wedge-shaped locking head (104) comprises a limiting portion (110) and a wedge-shaped portion (111), and the outer diameter of the limiting portion (110) matches the inner diameter of the sleeve (102).

7. A mechanical locking device for a ball valve according to claim 6, characterized in that: The cross section of the wedge-shaped portion (111) is set to a right-angled trapezoid, and the surface where the long hypotenuse of the trapezoid is located is used to achieve a bevel locking function.

8. The mechanical locking device for a ball valve according to claim 1, characterized in that: The sealing cap (101) is provided with an internal thread, and the end of the sleeve (102) is provided with an external thread matching the internal thread.

9. The mechanical locking device for a ball valve according to claim 1, characterized in that: A fixing screw (112) is provided at one end of the locking rod (103), and the outer diameter of the fixing screw (112) is smaller than the outer diameter of the locking rod (103).

10. A mechanical locking device for a ball valve according to claim 9, characterized in that: The sealing cap (101) is provided with a locking hole (113) matching the fixing screw (112).

Images