CN220416421U

CN220416421U - Mechanical lock spindle structure for overhauling water inlet ball valve

Info

Publication number: CN220416421U
Application number: CN202321764165.7U
Authority: CN
Inventors: 叶志强; 熊建平; 周延波; 陈璨; 蒋昭; 赵燕
Original assignee: Zhejiang Fuchunjiang Hydropower Equipment Co ltd
Current assignee: Zhejiang Fuchunjiang Hydropower Equipment Co ltd
Priority date: 2023-07-06
Filing date: 2023-07-06
Publication date: 2024-01-30
Anticipated expiration: 2033-07-06

Abstract

The utility model discloses a mechanical spindle locking structure for overhauling a water inlet ball valve, which comprises a spindle locking screw rod and is characterized in that: the screw sleeve is arranged outside the spindle locking screw, an upstream extension pipe flange is arranged outside the screw sleeve, internal threads and external threads are respectively arranged inside and outside the screw sleeve, a locking screw hole is formed in the end face of the screw sleeve, the screw sleeve is used as an intermediate device in the structure, the problem that the thread of the upstream extension pipe flange is easy to rust, send out and damage due to moisture can be effectively solved, the damage of the thread of the upstream extension pipe flange is avoided, meanwhile, parts required by the structure are fewer, the installation is easy, the production cost is lower, in addition, the stability of the structure is improved, and unnecessary problems such as looseness and the like are prevented.

Description

Mechanical lock spindle structure for overhauling water inlet ball valve

Technical Field

The utility model relates to a mechanical lock spindle structure, in particular to a mechanical lock spindle structure for overhauling a water inlet ball valve.

Background

The water inlet ball valve is an important device for controlling the inlet water flow of the hydroelectric power station, the sealing performance of the water inlet ball valve has a critical influence on the normal operation of the hydroelectric power station, and in order to ensure the safe operation of the water inlet ball valve, the safe and stable operation of the hydroelectric power station is ensured, and the water inlet ball valve is required to be frequently subjected to tightness detection in the use process.

At present, the structure of the mechanical lock spindle for overhauling the water inlet ball valve can be mainly divided into two types: axial mechanical lock spindle and radial mechanical lock spindle. The typical structural characteristic of the axial mechanical spindle lock is that an axial screw hole is formed in an extension pipe flange at the upstream of a water inlet ball valve, a threaded mechanical spindle lock screw is screwed in, the end head of the spindle lock screw props against an overhaul sealing movable sealing ring in a totally-closed state, and the spindle lock is carried out on the position of the overhaul sealing ring. However, because the water inlet ball valve is relatively wet in the environment, the mechanical lock spindle is often made of stainless steel, but the upstream extension pipe is made of non-stainless steel, and the screw thread pair between the lock spindle screw and the flange of the upstream extension pipe can be in danger of corrosion, hair-clamping and damage. The upstream extension pipe is heavy and welded with the water diversion steel pipe of the power station into a whole, and once the screw thread on the flange body of the upstream extension pipe is damaged, the repair is very difficult, and meanwhile, potential safety hazards are brought to the operation of the water inlet ball valve and the hydroelectric generating set.

The application number is CN201720453846.X discloses a ball valve overhaul mechanical locking device, which comprises a sleeve, wherein an ingot locking screw rod is arranged inside the sleeve; a positioning plate is arranged above the sleeve, a base plate for locking is arranged at the top of the positioning plate, and a locking throwing nut is arranged above the base plate; the sleeve and the locking throwing and retreating nut are externally provided with a back cap for supporting the locking throwing and retreating nut and the sleeve, the top of the back cap is provided with a hand disc, one side of the hand disc is provided with a hand disc locking nut, the defects of the hand disc locking nut are two, the first structure lacks waterproof protection, and the problems of rust, blockage, damage and the like of threads at the flange joint of an upstream extension pipe can be caused after the long-term use and repeated installation; the second structure uses too many parts, and is too loaded down with trivial details when overhauling the installation, has reduced work efficiency, and the excessive mutual cooperation between spare part probably leads to the leakproofness to become poor simultaneously.

Disclosure of Invention

Therefore, the technical problem to be solved by the utility model is to overcome the problems that stainless steel parts are rarely used at the flange of the upstream extension pipe, so that the locking device is easy to rust, send out and damage due to dampness after being installed and overhauled for many times, and the utility model provides the water inlet ball valve overhauling mechanical lock spindle structure with strong moistureproof capability at the thread, simple components and convenient installation.

Therefore, the utility model provides a mechanical spindle locking structure for overhauling a water inlet ball valve, which comprises a spindle locking screw rod and is characterized in that: the outside of the spindle locking screw is provided with a screw sleeve, the outside of the screw sleeve is provided with an upstream extension pipe flange, the inside and the outside of the screw sleeve are respectively provided with an internal thread and an external thread, and the end face of the screw sleeve is provided with a locking screw hole.

In this structure, used the swivel nut as intermediate device, can effectually solve the problem that connects upstream extension pipe flange screw thread department because moist corrosion easily, hairpin, damage to avoid the damage of upstream extension pipe flange screw thread, simultaneously, the required spare part of this kind of structure is less, easily installs, low in production cost, in addition, the setting of locking screw also is favorable to improving the stability of structure, prevents unnecessary problem emergence such as becoming flexible.

Preferably, the threaded sleeve is connected with the flange of the upstream extension tube through external threads, the spindle locking screw is arranged inside the threaded sleeve, a threaded short shaft is arranged on the spindle locking screw, the threaded sleeve is connected with the threaded short shaft through threads, and the threaded sleeve is connected with the flange of the upstream extension tube through external threads, so that firm connection of the structure is ensured, meanwhile, the threaded sleeve is connected with the internal threads of the spindle locking screw, the spindle locking screw can be arranged more conveniently and rapidly, the installation detection efficiency is improved, and in addition, the problems of rust, hairpin, damage and the like of the threads of the flange of the upstream extension tube can be effectively solved through the interval action of the threaded sleeve.

Preferably, the spindle locking screw comprises a large end shaft, a limiting plate is arranged on the large end shaft, the limiting plate is a cylindrical ring body, a through hole is formed in the center of the end face of the limiting plate, and the stability and reliability of the spindle locking screw are improved due to the design of the large end shaft. Meanwhile, the limiting plate is arranged on the large end shaft, so that the spindle locking screw rod is effectively pressed, and the spindle locking screw rod is prevented from falling out.

Preferably, the spindle locking screw further comprises a threaded shaft and a small end shaft, the inner diameter of the through hole is between the large end shaft and the small end shaft, a first counter bore and a threaded hole are formed in the end face of the limiting plate, the limiting plate is sequentially inserted into the first counter bore and a locking threaded hole of the threaded sleeve through a locking screw to be fixed with the threaded sleeve, the limiting plate compresses the end face of the threaded sleeve, and the locking firmness can be improved by adopting a mode that the limiting plate compresses the threaded sleeve, so that loosening phenomenon is avoided in the use process, and in addition, the connecting part of the limiting plate and the locking threaded hole is fixed by using the locking screw, so that the influence on the overall stability due to looseness of the locking plate in the use process can be avoided.

Preferably, one side of the threaded shaft is provided with an annular gasket, a second counter bore is formed in the annular gasket, one side of the annular gasket is provided with a locking nut, the annular gasket is sequentially inserted into the second counter bore and a threaded hole in the limiting plate through a connecting screw and is fixed with the limiting plate, the locking nut compresses the annular gasket, and then compresses the end face of the limiting plate, a sealing groove is formed in the small end shaft, a sealing ring is arranged in the sealing groove, the sealing ring is designed to improve the overall tightness, the detection accuracy and reliability are ensured, the locking nut is adopted to compress the annular gasket, the annular gasket plays a role of an end face bearing in compressing the limiting plate, friction is reduced, and in addition, the locking nut is used outside the threaded shaft to be connected with the threaded shaft, so that the structure is more stable and reliable, and the overall safety is improved.

Preferably, the spindle locking screw rod is of an integrated structure, the spindle locking screw rod and the limiting plate are of an integrated structure, the small end of the spindle locking screw rod is provided with an overhaul sealing ring, the small end face of the spindle locking screw rod compresses the overhaul sealing ring, and the integrated structure of the spindle locking screw rod greatly improves the overall stability and reliability.

Compared with the prior art, the utility model has the beneficial effects that:

1. compared with the prior art, the stainless steel screw sleeve is innovatively arranged, so that the corrosion resistance in a humid environment is improved, and the risk of hair clip caused by corrosion of a screw pair is eliminated;

2. the thread pair between the upstream extension pipe flange and the stainless steel screw sleeve does not generate relative movement after being installed, and the threads on the upstream extension pipe flange are not damaged;

3. the limiting plate for the withdrawal of the spindle locking screw can be conveniently installed on the stainless steel screw sleeve, and the axial position of the limiting plate can be conveniently adjusted by the screw pair between the screw sleeve and the flange of the upstream extension pipe.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.

FIG. 1 is a cross-sectional view of the overall structure of the present utility model;

FIG. 2 is a cross-sectional view of two oblique sides of the present utility model;

FIG. 3 is an end view of a limiting plate according to the present utility model;

FIG. 4 is a schematic end view of a sleeve according to the present utility model;

the drawings include:

1, locking an ingot screw rod; 2, locking the nut; 3, a threaded shaft; 4, a large end shaft; 5, limiting plates; 6, locking a screw; 7, a first counter bore; 8, an upstream extension pipe flange; 9, a screw sleeve; 10, a threaded short shaft; 11, overhauling the sealing ring; 12, a sealing ring; 13, sealing the groove; 14, a small end shaft; 15, an annular gasket; 16, locking the screw hole; and 17, a threaded hole.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In this structure, used swivel nut interval structure, the effectual solution is connected upstream extension pipe flange screw thread department because moist corrosion, hairpin, the problem of damage easily to avoid the damage of upstream extension pipe flange screw thread, simultaneously, the required spare part of this kind of structure is less, easily installation, low in production cost, in addition, use lock nut to sticis swivel nut structure, can effectively lock into water ball valve, ensure that the valve is in stable position, and unexpected removal or loosening are favorable to improving the stability of structure.

Examples:

the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings.

Referring to fig. 1 to 4, an axial locking structure for repairing and sealing a water inlet ball valve according to the present embodiment includes: 1, locking an ingot screw rod; 2, locking the nut; 3, a threaded shaft; 4, a large end shaft; 5, limiting plates; 6, locking a screw; 7, a first counter bore; 8, an upstream extension pipe flange; 9, a screw sleeve; 10, a threaded short shaft; 11, overhauling the sealing ring; 12, a sealing ring; 13, sealing the groove; 14, a small end shaft; 15, an annular gasket; 16, locking the screw hole; and 17, a threaded hole.

As shown in fig. 1, the threaded sleeve 9 is connected with the upstream extension pipe flange 8 through external threads, the spindle locking screw 1 is installed inside the threaded sleeve 9, a threaded short shaft 10 is arranged on the locking screw, and the threaded sleeve 9 is connected with the threaded short shaft 10 through threads.

As shown in fig. 2, the external threads of the threaded sleeve 9 are matched with the external threads of the upstream extension pipe flange 8, the threaded sleeve 9 is screwed into the upstream extension pipe flange 8, the direct matching of the spindle locking screw 1 and the upstream extension pipe threads is avoided, as the threads at the upstream extension pipe flange 8 are not made of stainless steel materials, the threaded sleeve 9 is adopted for spacing, the problems of rust, hairpin and damage of the threads at the upstream extension pipe flange 8 caused by moisture can be avoided, meanwhile, the threaded sleeve 9 is fixed with the upstream extension pipe flange 8, and the problem of damage of the threads of the upstream extension pipe flange 8 caused by multiple disassembly and assembly is also avoided.

The spindle locking screw 1 comprises a big end shaft 4, a threaded shaft 3 and a small end shaft 14, wherein a limiting plate 5 is arranged on the big end shaft 4, the limiting plate 5 (shown in figure 3) is a cylindrical ring body, a through hole is arranged in the center of the end face of the limiting plate 5, the inner diameter of the through hole is between the big end shaft 4 and the small end shaft 14, a first counter bore 7 and a threaded hole 17 are arranged on the end face of the limiting plate 5, the limiting plate 5 is sequentially inserted into the first counter bore 7 and a locking screw hole 16 of a screw sleeve 9 through a locking screw 6 to be fixed with the screw sleeve 9, and the limiting plate 5 compresses the end face of the screw sleeve 9.

After the work is finished, the withdrawal position of the spindle locking screw 1 needs to be adjusted, the limiting plate 5 is used for propping against the end face of the threaded short shaft 10 of the spindle locking screw 1, the withdrawal position is accurate, the speed is high, and the work efficiency of using and dismounting is improved.

The screw shaft 3 one side sets up annular gasket 15 (fig. 4), set up the second counter bore on the annular gasket 15, annular gasket 15 one side sets up lock nut 2, annular gasket 15 inserts the screw hole 17 on second counter bore and the limiting plate 5 in proper order through connecting screw and is fixed with the limiting plate 5, lock nut 2 compresses tightly annular gasket 15, and then compress tightly limiting plate 5 terminal surface, set up seal groove 13 on the tip axle 14, set up sealing washer 12 in the seal groove 13, lock spindle screw 1, limiting plate 5 is integrated into one piece structure, lock spindle screw 1 tip department sets up overhauls sealing ring 11, lock screw tip terminal surface compresses tightly overhauls sealing ring 11.

The using mode is as follows:

when the ingot locking screw 1 is overhauled and locked, a right side overhauling sealing ring 11 is needed to be compressed, a special tool is used for screwing a screw sleeve 9 into an upstream extension pipe flange 8, a sealing ring 12 is sleeved on a small end shaft 14 of the ingot locking screw 1, the ingot locking screw 1 is screwed into the screw sleeve 9, the right side overhauling sealing ring 11 is compressed, a limiting plate 5 is sleeved on the ingot locking screw 1, the limiting plate 5 is inserted into a first counter bore 7 by a locking screw, the locking screw 16 on the end face of the screw sleeve 9 is screwed and fixed, a ring-shaped gasket 15 is sleeved on the locking screw, the ring-shaped gasket 15 is connected with the limiting plate 5 by a bolt, the bolt head is sunk into a second counter bore, the locking nut 2 is sleeved on a threaded shaft 3 of the ingot locking screw 1, the ring-shaped gasket 15 is compressed by the locking nut 2, and overhauling and sealing installation are completed; after the overhaul is completed, the threaded sleeve 9 is rotated to a proper position, the spindle locking screw 1 is withdrawn to the end face of the limiting plate 5, the spindle locking screw 1 is withdrawn, and the overhaul sealing ring 11 can be detached.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims

1. The utility model provides a water inlet ball valve overhauls mechanical lock spindle structure, includes lock spindle screw rod (1), its characterized in that: the spindle locking screw is characterized in that a screw sleeve (9) is arranged outside the spindle locking screw (1), an upstream extension pipe flange (8) is arranged outside the screw sleeve (9), internal threads and external threads are respectively arranged inside and outside the screw sleeve (9), and a locking screw hole (16) is formed in the end face of the screw sleeve (9).

2. The mechanical lock spindle structure for overhauling a water inlet ball valve according to claim 1, wherein the threaded sleeve (9) is connected with the upstream extension pipe flange (8) through external threads, the lock spindle screw (1) is installed inside the threaded sleeve (9), a threaded short shaft (10) is arranged on the lock spindle screw (1), and the threaded sleeve (9) is connected with the threaded short shaft (10) through threads.

3. The mechanical lock spindle structure for overhauling a water inlet ball valve according to claim 2, wherein the lock spindle screw (1) comprises a large end shaft (4), a limiting plate (5) is arranged on the large end shaft (4), the limiting plate (5) is a cylindrical ring body, and a through hole is formed in the center of the end face of the limiting plate (5).

4. A water inlet ball valve overhauling mechanical lock spindle structure according to claim 3, characterized in that the lock spindle screw (1) further comprises a threaded shaft (3) and a small end shaft (14), and the inner diameter of the through hole is between the large end shaft (4) and the small end shaft (14).

5. The mechanical lock spindle structure for overhauling a water inlet ball valve according to claim 3, wherein a first counter bore (7) and a threaded hole (17) are formed in the end face of the limiting plate (5), the limiting plate (5) is sequentially inserted into the first counter bore (7) and a locking threaded hole (16) of a threaded sleeve (9) through a locking screw (6) to be fixed with the threaded sleeve (9), and the limiting plate (5) compresses the end face of the threaded sleeve (9).

6. The mechanical lock spindle structure for overhauling a water inlet ball valve according to claim 4, wherein an annular gasket (15) is arranged on one side of the threaded shaft (3), a second counter bore is formed in the gasket (15), and a lock nut (2) is arranged on one side of the annular gasket (15).

7. The mechanical lock spindle structure for overhauling a water inlet ball valve according to claim 6, wherein the gasket (15) is sequentially inserted into the second counter bore and the threaded hole (17) on the limiting plate (5) through the connecting screw to be fixed with the limiting plate (5), the locking nut (2) is used for tightly pressing the gasket (15) and then tightly pressing the end face of the limiting plate (5), the small end shaft (14) is provided with the sealing groove (13), and the sealing ring (12) is arranged in the sealing groove (13).

8. The mechanical lock spindle structure for overhauling a water inlet ball valve according to any one of claims 1, 3, 4 and 5 is characterized in that the lock spindle screw (1) and the limiting plate (5) are of an integrated structure, an overhauling sealing ring (11) is arranged at the small end of the lock spindle screw (1), and the small end face of the lock spindle screw (1) compresses the overhauling sealing ring (11).