阅读说明：本技术 一种球阀 (Ball valve ) 是由 黄洪刚 张柏 于 2020-05-18 设计创作，主要内容包括：本发明公开了一种球阀,包括阀体,所述阀体内设有安装孔,所述阀体的左右两端分别固定安装有左通道管和右通道管,所述阀体的下端固定安装有端盖,所述安装孔内转动连接有球芯,所述阀体内设有驱动轴,所述驱动轴上设有至少一个平键；所述驱动轴上套设有至少一个密码盘；转动所述密码盘,可控制所述驱动轴沿所述阀体上下滑动,进而控制所述驱动轴与所述球芯的连接；该球阀不仅结构简单而且防盗结构更加可靠。(The invention discloses a ball valve which comprises a valve body, wherein a mounting hole is formed in the valve body, a left channel pipe and a right channel pipe are respectively and fixedly mounted at the left end and the right end of the valve body, an end cover is fixedly mounted at the lower end of the valve body, a ball core is rotatably connected in the mounting hole, a driving shaft is arranged in the valve body, and at least one flat key is arranged on the driving shaft; at least one cipher disk is sleeved on the driving shaft; the cipher disk is rotated to control the driving shaft to slide up and down along the valve body, so that the connection between the driving shaft and the ball core is controlled; the ball valve is simple in structure and more reliable in anti-theft structure.)

1. A ball valve comprises a valve body, wherein a mounting hole with an opening at the lower end is formed in the valve body, a left channel pipe communicated with the mounting hole is fixedly mounted on the left side of the valve body, a right channel pipe communicated with the mounting hole is fixedly mounted on the right side of the valve body, and the left channel pipe and the right channel pipe are coaxially arranged; an end cover is fixedly arranged at an opening at the lower end of the mounting hole, and a ball core for controlling the on-off of the left channel pipe and the right channel pipe is rotatably connected on the end cover in the mounting hole; it is characterized in that the preparation method is characterized in that,

the upper end of the valve body is provided with a convex column, a convex column through hole communicated with the installation cavity is eccentrically arranged in the convex column, the side wall of the convex column through hole is provided with a first key groove, the convex column is provided with at least one annular groove coaxial with the convex column through hole, and a driving shaft is arranged in the convex column through hole; the driving shaft is provided with at least one flat key which is in sliding fit with the first key groove along the radial direction, the upper end of the ball core is provided with a square connecting hole, and the lower end of the driving shaft is provided with a square connecting block which is matched with the connecting hole; the driving shaft is sleeved with at least one password disk, the password disk is rotatably connected in the annular groove, and a second key groove matched with the flat key is formed in the password disk;

when the cipher disk rotates to the state that the second key groove is flush with the first key groove, the driving shaft can slide up and down along the convex column through hole; when the cipher disk rotates to the state that the second key groove is staggered with the first key groove, the driving shaft cannot slide up and down along the convex column through hole; when the driving shaft slides to the lower end, the connecting block extends into the connecting hole, the flat key is positioned in the second key groove, and the driving shaft is rotated to drive the ball core to rotate; when the driving shaft slides to the upper end, the connecting block is separated from the connecting hole, and after the password disk is rotated to enable the second key groove to be staggered with the first key groove, the flat key on the driving shaft is blocked by the password disk, so that the flat key cannot slide up and down and cannot rotate.

2. The ball valve of claim 1, wherein a handle is fixedly mounted to an upper end of the drive shaft.

3. The ball valve of claim 1, wherein the combination disks are marked with scale values on their outer circumference.

4. The ball valve according to claim 1, wherein three annular grooves are formed in the convex column at intervals from top to bottom, three code disks are rotatably connected in the three annular grooves respectively, three flat keys are formed in the driving shaft at intervals from top to bottom, and the three flat keys correspond to the three second key grooves in the code disks in a one-to-one manner.

5. The ball valve according to claim 1, wherein a stopper for preventing the driving shaft from being separated from the boss through hole is fixedly installed at an upper end of the boss.

6. The ball valve according to claim 1, wherein a left sealing member forming a contact seal with the ball core is arranged on a right end surface of the left channel pipe, and a right sealing member forming a contact seal with the ball core is arranged on a left end surface of the right channel pipe.

Technical Field

The invention belongs to the technical field of pipeline valves, and particularly relates to a ball valve.

Background

The ball valve is a common valve used in pipelines of chemical industry, gas transportation, urban gas supply and tap water supply, and has the advantages of simple structure, reliable opening and closing and long service life. Therefore, it is widely used in the above fields. The common structure ball valve can be directly controlled by a user according to requirements, has control freedom and flexibility for direct users, but loses control right for management units of air supply and water supply, and the loss of the control right can cause potential safety hazards of tap water and gas leakage or risks of being stolen after the valve is operated by mistake or is operated without permission when front-end engineering construction is not finished or the conditions of air supply and water supply are not met. The existing valve is mainly opened without authorization by designing a valve rod pulling interface into a special interface form, and a special spanner or a special hand wheel is not arranged on the valve and only can be opened by a special person by using the special spanner or the special hand wheel. The special tool is bound to adopt a clamping structure which is convenient to connect and take out, the connection precision is low, the firmness is poor, and the special tool is easy to slip after being used for a period of time, so that the opening and closing effect is influenced; and the structure size is large, and the carrying is inconvenient. Although some ball valves which are provided with a locking mechanism and are locked and unlocked through a special key exist in the market at present, the ball valves have the defects of either complicated structure or inconvenient operation. For example, chinese patent publication No. CN204312756U, published as 2012 for 4.4.4, invents a utility model named "ball valve", and discloses a ball valve, which is provided with a locking screw between a handle and a valve body, and is unlocked and locked by a special key, and the key has a small structural size, is convenient to carry, and is labor-saving in locking and unlocking operations. However, the valve can be unlocked only after the locking screw is detached, and the defects of complex operation and easy loss of the screw exist.

Disclosure of Invention

The invention aims to provide a ball valve which is simple in structure and more reliable in anti-theft structure.

In order to achieve the purpose, the invention provides the following technical scheme:

a ball valve comprises a valve body, wherein a mounting hole with an opening at the lower end is formed in the valve body, a left channel pipe communicated with the mounting hole is fixedly mounted on the left side of the valve body, a right channel pipe communicated with the mounting hole is fixedly mounted on the right side of the valve body, and the left channel pipe and the right channel pipe are coaxially arranged; an end cover is fixedly arranged at an opening at the lower end of the mounting hole, and a ball core for controlling the on-off of the left channel pipe and the right channel pipe is rotatably connected on the end cover in the mounting hole; it is characterized in that the preparation method is characterized in that,

the upper end of the valve body is provided with a convex column, a convex column through hole communicated with the installation cavity is eccentrically arranged in the convex column, the side wall of the convex column through hole is provided with a first key groove, the convex column is provided with at least one annular groove coaxial with the convex column through hole, and a driving shaft is arranged in the convex column through hole; the driving shaft is provided with at least one flat key which is in sliding fit with the first key groove along the radial direction, the upper end of the ball core is provided with a square connecting hole, and the lower end of the driving shaft is provided with a square connecting block which is matched with the connecting hole; the driving shaft is sleeved with at least one password disk, the password disk is rotatably connected in the annular groove, and a second key groove matched with the flat key is formed in the password disk;

when the cipher disk rotates to the state that the second key groove is flush with the first key groove, the driving shaft can slide up and down along the convex column through hole; when the cipher disk rotates to the state that the second key groove is staggered with the first key groove, the driving shaft cannot slide up and down along the convex column through hole; when the driving shaft slides to the lower end, the connecting block extends into the connecting hole, the flat key is positioned in the second key groove, and the driving shaft is rotated to drive the ball core to rotate; when the driving shaft slides to the upper end, the connecting block is separated from the connecting hole, and after the password disk is rotated to enable the second key groove to be staggered with the first key groove, the flat key on the driving shaft is blocked by the password disk, so that the flat key cannot slide up and down and cannot rotate.

Further, a handle is fixedly mounted at the upper end of the driving shaft.

Furthermore, the outer circumference of the cipher disk is marked with scale values.

Further, the projection is provided with three annular grooves at intervals from top to bottom, three code discs are rotatably connected in the three annular grooves respectively, three flat keys are arranged at intervals from top to bottom on the driving shaft, and the three flat keys correspond to the second key grooves in the code discs one to one.

Furthermore, the upper end of the convex column is fixedly provided with a plug for preventing the driving shaft from separating from the convex column through hole.

Furthermore, a left sealing piece which forms contact seal with the ball core is arranged on the right end face of the left channel pipe, and a right sealing piece which forms contact seal with the ball core is arranged on the left end face of the right channel pipe.

Advantageous effects

Compared with the prior art, the technical scheme of the invention has the following advantages: the ball valve can control the driving shaft to slide up and down by arranging the password disk, when the password disk is in an unlocking state, the driving shaft can freely slide up and down in the valve body, at the moment, the connecting block on the driving shaft can be connected with the connecting hole, and the driving shaft can be rotated to drive the ball core to rotate, so that the ball valve is unlocked; when the password disk is in a locking state, the driving shaft can not freely slide in the valve body and can not rotate, the connecting block on the driving shaft is separated from the connecting hole, and the ball core is locked, so that the anti-theft structure of the ball valve is simpler and more reliable.

Drawings

FIG. 1 is a cross-sectional view of the present invention with the core in the closed position and in the locked position;

FIG. 2 is a cross-sectional view of the present invention with the core in the closed position and in the unlocked position;

FIG. 3 is a cross-sectional view of a valve body according to the present invention;

FIG. 4 is a schematic three-dimensional view of the drive shaft of the present invention;

fig. 5 is a schematic three-dimensional structure diagram of the cipher disk of the present invention.

Detailed Description

Referring to fig. 1-5, a ball valve includes a valve body 1, a mounting hole 1a with an opening at the lower end is arranged in the valve body 1, a left channel tube 2a communicated with the mounting hole 1a is fixedly mounted at the left side of the valve body 1, a right channel tube 2b communicated with the mounting hole 1a is fixedly mounted at the right side of the valve body 1, and the left channel tube 2a and the right channel tube 2b are coaxially arranged; an end cover 3 is fixedly arranged at an opening at the lower end of the mounting hole 1a, and a ball core 4 for controlling the on-off of the left channel pipe 2a and the right channel pipe 2b is rotatably connected to the end cover 3 in the mounting hole 1 a.

A convex column 101 is arranged at the upper end of the valve body 1, a convex column through hole 102 communicated with the installation cavity 1a is eccentrically arranged in the convex column 101, a first key groove 103 is arranged on the side wall of the convex column through hole 102, three annular grooves 104 coaxial with the convex column through hole 102 are arranged on the convex column 101 from top to bottom at intervals, and a driving shaft 5 is arranged in the convex column through hole 103; three flat keys 51 which are in sliding fit in the first key grooves 103 are arranged on the driving shaft 5 from top to bottom along the radial direction, a square connecting hole 41 is formed in the upper end of the ball core 4, and a square connecting block 52 which is matched with the connecting hole 41 is arranged at the lower end of the driving shaft 5; the driving shaft 5 is sleeved with three password disks 6, the three password disks 6 are respectively and rotatably connected in the three annular grooves 104, the password disks 6 are provided with second key grooves 61 matched with the flat keys 51, and the outer circumferences of the password disks 6 are marked with scale values. The upper end of the driving shaft 5 is fixedly provided with a handle 7, and the upper end of the convex column 101 is fixedly provided with a plug 8 for preventing the driving shaft 5 from separating from the convex column through hole 102.

When the three cipher disks 6 are all rotated to the state that the second key grooves 61 are flush with the first key grooves 103, the driving shaft 5 can slide up and down along the convex column through hole 102; when a second key groove formed by rotating one of the three password disks is staggered with a first key groove 103 formed by rotating the other password disk 61, the driving shaft 5 cannot slide up and down along the convex column through hole 102; when the driving shaft 5 slides to the lower end, the connecting block 52 extends into the connecting hole 41, and the flat key 51 is located in the second key groove 61, so that the driving shaft 5 is rotated to drive the ball core 4 to rotate; when the driving shaft 5 slides to the upper end, the connecting block 52 is separated from the connecting hole 41, and after the cipher disk 6 is rotated to make the second key groove staggered with the first key groove, the flat key 51 on the driving shaft is blocked by the cipher disk 6 and cannot slide up and down or rotate.

When the three password disks 6 are all rotated to correct password positions, the ball valve is in an unlocking state, the second key grooves 61 on the three password disks are flush with the first key grooves 103, the three flat keys 51 can slide up and down in the first key grooves 103 and the second key grooves 61, when the three flat keys slide down in the three second key grooves 61, the connecting blocks 52 are connected with the connecting holes 41, the rotating handle 7 can drive the ball core 4 to rotate, the ball valve is opened, and the opening and closing of the ball core 4 can be adjusted at will through the handle 7.

When the ball valve needs to be locked, the ball core 4 is firstly rotated to a closed position, then the handle 7 is lifted upwards, the connecting block 52 is driven to be separated from the connecting hole 41, meanwhile, the three flat keys 51 return to the first key groove 103 again, then 3 code discs 6 are disordered, the second key groove 61 and the first key groove 103 are staggered, the driving shaft 5 cannot move downwards due to the fact that the three flat keys are blocked by the three code discs, and meanwhile, the ball core 4 cannot rotate due to the fact that the three flat keys are blocked by the first key groove 103, and is in a locking state.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.