阅读说明：本技术 一种旋塞阀 (Plug valve ) 是由 李奎 马敬虎 布发朝 于 2020-07-04 设计创作，主要内容包括：本发明公开了一种旋塞阀,包括阀体,所述阀体内设有阀腔,所述阀腔的上端开口处固定设有阀盖,所述阀体的侧面设有进口管和出口管；所述阀腔内转动连接有用于下旋塞,所述下旋塞内设有阀瓣腔,所述阀腔内在下旋塞的上端固定安装有上旋塞,所述下旋塞内对称设有与阀瓣腔连通的第一通孔和第二通孔,所述下旋塞内在第一通孔的两侧对称设有与阀瓣腔连通的左槽口和右槽口；所述上旋塞和阀瓣腔的底部之间对称设有左阀瓣和右阀瓣；所述上旋塞的上端设有穿过阀盖的阀杆,所述阀杆内转动连接有下端伸入阀瓣腔内的轴杆,所述轴杆的下端设有用于控制左阀瓣和右阀瓣同步转动的传动组件；该旋塞阀不仅结构简单,而且更换密封面时简单快捷,无需拆卸。(The invention discloses a plug valve which comprises a valve body, wherein a valve cavity is arranged in the valve body, a valve cover is fixedly arranged at an opening at the upper end of the valve cavity, and an inlet pipe and an outlet pipe are arranged on the side surface of the valve body; the valve cavity is rotationally connected with a lower cock, a valve clack cavity is arranged in the lower cock, an upper cock is fixedly arranged at the upper end of the lower cock in the valve cavity, a first through hole and a second through hole which are communicated with the valve clack cavity are symmetrically arranged in the lower cock, and a left notch and a right notch which are communicated with the valve clack cavity are symmetrically arranged on two sides of the first through hole in the lower cock; a left valve clack and a right valve clack are symmetrically arranged between the upper plug and the bottom of the valve clack cavity; the upper end of the upper cock is provided with a valve rod penetrating through the valve cover, the valve rod is rotationally connected with a shaft rod of which the lower end extends into the valve clack cavity, and the lower end of the shaft rod is provided with a transmission assembly for controlling the synchronous rotation of the left valve clack and the right valve clack; the plug valve is simple in structure, simple and fast in replacing the sealing surface and free of disassembly.)

1. A plug valve comprises a valve body, wherein a valve cavity is arranged in the valve body, a valve cover is fixedly arranged at an opening at the upper end of the valve cavity, an inlet pipe and an outlet pipe which are communicated with the valve cavity are arranged on the side surface of the valve body, and the inlet pipe and the outlet pipe are coaxially arranged; the lower cock is characterized in that a valve clack cavity with an opening at the upper end is arranged in the lower cock, an upper cock is fixedly arranged at the upper end of the lower cock in the valve cavity, a first through hole and a second through hole which are communicated with the valve clack cavity are symmetrically arranged in the lower cock, a left notch and a right notch which are communicated with the valve clack cavity are symmetrically arranged on two sides of the first through hole in the lower cock, when the lower cock rotates to a first working position, the first through hole is communicated with the inlet pipe, the second through hole is communicated with the outlet pipe, the left notch is disconnected with the inlet pipe, and the right notch is disconnected with the outlet pipe; when the lower cock rotates to a second working position, the first through hole is disconnected with the inlet pipe, the second through hole is disconnected with the outlet pipe, the left notch is communicated with the inlet pipe, and the right notch is communicated with the outlet pipe; a left valve clack and a right valve clack are symmetrically arranged between the upper plug and the bottom of the valve clack cavity; the upper end of the upper cock is provided with a valve rod penetrating through the valve cover, the valve rod is rotationally connected with a shaft rod of which the lower end extends into the valve clack cavity, and the lower end of the shaft rod is provided with a transmission assembly for controlling the synchronous rotation of the left valve clack and the right valve clack; when the left valve clack and the right valve clack are rotated to the first working position, the first through hole is closed by the left valve clack, the second through hole is closed by the right valve clack, when the left valve clack and the right valve clack are rotated to the second working position, the first through hole is opened by the left valve clack and is positioned in the left notch, the second through hole is opened by the right valve clack and is positioned in the right notch, and the outer side surfaces of the left valve clack and the right valve clack and the outer side surface of the lower cock are positioned in the same curved surface.

2. The plug valve of claim 1, wherein the transmission assembly comprises a left connecting rod and a right connecting rod, the lower end of the shaft rod is symmetrically provided with a left lug and a right lug, one end of the left connecting rod is hinged on the left valve clack, the other end of the left connecting rod is hinged on the left lug, one end of the right connecting rod is hinged on the right valve clack, and the other end of the right connecting rod is hinged on the right lug; the bottom of valve clack chamber and the lower extreme of last cock are central symmetry and are equipped with first left groove and first right groove to and two left grooves and two right grooves, the both ends of left valve clack are equipped with and stretch into first left projection in the first left groove to and stretch into two left projections in the second left groove, the both ends of right valve clack are equipped with and stretch into first right projection in the first right groove to and stretch into two right projections in the second right groove.

3. The plug valve of claim 1, wherein the left groove comprises a left arc groove and a left straight groove that are in communication with each other, and the left groove comprises a left arc groove and a left straight groove that are in communication with each other; the right groove comprises a right arc groove and a right straight groove which are communicated with each other; the right two grooves comprise a right two arc groove and a right two straight groove which are mutually communicated; when the left valve clack and the right valve clack rotate to a first working position, the left convex column is positioned at the end part of the left straight groove, the right convex column is positioned at the end part of the right straight groove, and the right convex column is positioned at the end part of the right straight groove; when the left valve clack and the right valve clack rotate to the second working position, the left convex column is located at the end part of the left arc groove, the right convex column is located at the end part of the right arc groove, and the right convex column is located at the end part of the right arc groove.

4. A plug valve according to claim 1, wherein the bonnet is provided with a sealing ring on the outside of the valve stem.

5. The plug valve of claim 1, wherein a handle lever is fixedly mounted to an upper end of the valve stem.

6. The plug valve according to claim 5, wherein a first positioning disk is fixedly arranged at the upper end of the handle rod, a first handle is fixedly arranged at the upper end of the shaft rod, a first positioning rod is hinged on the first handle, and a first spring is arranged between the first handle and the first positioning rod and used for forcing one end of the first positioning rod to abut against the outer side of the circumference of the first positioning disk.

Technical Field

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

Background

The plug valve is a rotary valve which is opened and closed by rotating a closing member (plug) around the central line of a valve body, and the opening or closing is realized by rotating 90 degrees to enable a passage port on the plug to be communicated with or separated from a passage port on the valve body. The plug valve is widely applied to oil field exploitation, transportation and refining equipment, and is also widely applied to petrochemical industry, chemical industry, coal gas, natural gas, liquefied petroleum gas, heating and ventilation industry, ships and general industry. The plug valve is mainly sealed by means of direct contact between a metal plug body subjected to finish machining and a valve body inner cavity, is extremely easy to wear, and can not be effectively sealed with the valve body inner cavity after the plug body is worn, so that the whole plug valve can fail and cannot be used. The service life of the plug valve is shortened, and the production and maintenance cost is increased.

Disclosure of Invention

The invention aims to provide a plug valve which is simple in structure, simple and quick in replacement of a sealing surface and free from disassembly.

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

a plug valve comprises a valve body, wherein a valve cavity is arranged in the valve body, a valve cover is fixedly arranged at an opening at the upper end of the valve cavity, an inlet pipe and an outlet pipe which are communicated with the valve cavity are arranged on the side surface of the valve body, and the inlet pipe and the outlet pipe are coaxially arranged; the lower cock is internally and symmetrically provided with a first through hole and a second through hole which are communicated with the valve clack cavity, a left notch and a right notch which are communicated with the valve clack cavity are symmetrically arranged at two sides of the first through hole in the lower cock, when the lower cock rotates to a first working position, the first through hole is communicated with the inlet pipe, the second through hole is communicated with the outlet pipe, the left notch is disconnected with the inlet pipe, and the right notch is disconnected with the outlet pipe; when the lower cock rotates to a second working position, the first through hole is disconnected with the inlet pipe, the second through hole is disconnected with the outlet pipe, the left notch is communicated with the inlet pipe, and the right notch is communicated with the outlet pipe; a left valve clack and a right valve clack are symmetrically arranged between the upper plug and the bottom of the valve clack cavity; the upper end of the upper cock is provided with a valve rod penetrating through the valve cover, the valve rod is rotationally connected with a shaft rod of which the lower end extends into the valve clack cavity, and the lower end of the shaft rod is provided with a transmission assembly for controlling the synchronous rotation of the left valve clack and the right valve clack; when the left valve clack and the right valve clack are rotated to the first working position, the first through hole is closed by the left valve clack, the second through hole is closed by the right valve clack, when the left valve clack and the right valve clack are rotated to the second working position, the first through hole is opened by the left valve clack and is positioned in the left notch, the second through hole is opened by the right valve clack and is positioned in the right notch, and the outer side surfaces of the left valve clack and the right valve clack and the outer side surface of the lower cock are positioned in the same curved surface.

Furthermore, the transmission assembly comprises a left connecting rod and a right connecting rod, the lower end of the shaft rod is symmetrically provided with a left lug and a right lug, one end of the left connecting rod is hinged on the left valve clack, the other end of the left connecting rod is hinged on the left lug, one end of the right connecting rod is hinged on the right valve clack, and the other end of the right connecting rod is hinged on the right lug; the bottom of valve clack chamber and the lower extreme of last cock are central symmetry and are equipped with first left groove and first right groove to and two left grooves and two right grooves, the both ends of left valve clack are equipped with and stretch into first left projection in the first left groove to and stretch into two left projections in the second left groove, the both ends of right valve clack are equipped with and stretch into first right projection in the first right groove to and stretch into two right projections in the second right groove.

Further, the left first groove comprises a left first arc groove and a left first straight groove which are mutually communicated, and the left second groove comprises a left second arc groove and a left second straight groove which are mutually communicated; the right groove comprises a right arc groove and a right straight groove which are communicated with each other; the right two grooves comprise a right two arc groove and a right two straight groove which are mutually communicated; when the left valve clack and the right valve clack rotate to a first working position, the left convex column is positioned at the end part of the left straight groove, the right convex column is positioned at the end part of the right straight groove, and the right convex column is positioned at the end part of the right straight groove; when the left valve clack and the right valve clack rotate to the second working position, the left convex column is located at the end part of the left arc groove, the right convex column is located at the end part of the right arc groove, and the right convex column is located at the end part of the right arc groove.

Further, a sealing ring is arranged on the outer side of the valve rod in the valve cover.

Furthermore, a handle rod is fixedly installed at the upper end of the valve rod.

Furthermore, the upper end fixed mounting of handle bar has first positioning disk, the upper end fixed mounting of axostylus axostyle has first handle, it has first locating lever to articulate on the first handle, be equipped with first spring between first handle and the first locating lever, first spring is used for forcing the one end of first locating lever to contradict in the circumference outside of first positioning disk.

Advantageous effects

Compared with the prior art, the technical scheme of the invention has the following advantages:

the invention is provided with an upper cock and a lower cock, wherein a first through hole and a second through hole, a left notch and a right notch are symmetrically arranged on the lower cock, a left valve clack and a right valve clack are rotatably connected between the upper cock and the lower cock, the left valve clack and the right valve clack have two working positions, when the left valve clack and the right valve clack are positioned at the first working position, the left valve clack closes the first through hole, the right valve clack closes the second through hole, and at the moment, a sealing surface on the outer side of the circumference of the lower cock forms contact sealing with the inner wall of a valve cavity to realize the opening or closing of the cock, namely when the lower cock rotates to the first working position, the left notch is disconnected with an inlet pipe, and the right notch is disconnected with an outlet pipe to realize the closing of the cock; when a sealing surface on the outer side of the circumference of the lower plug is damaged, firstly rotating the valve rod to control the lower plug to rotate to a first working position, then rotating the shaft rod, controlling the left valve clack and the right valve clack to rotate to a second working position through the transmission assembly, opening the first through hole by the left valve clack and positioning the first through hole in the left notch, opening the second through hole by the right valve clack and positioning the second through hole in the right notch, and positioning the outer side surfaces of the left valve clack and the right valve clack and the outer side surface of the lower plug in the same curved surface; when the plug valve needs to be closed, the plug valve is controlled to rotate to a second working position by rotating the valve rod, so that the first through hole is disconnected with the inlet pipe, the second through hole is disconnected with the outlet pipe, meanwhile, the left valve clack rotates to a position for plugging the inlet pipe, and the right valve clack rotates to a position for plugging the outlet pipe, so that contact sealing is formed between sealing surfaces on the outer sides of the circumferences of the left valve clack and the right valve clack and the inner side wall of the valve cavity, and the plug valve is opened or closed; compared with the prior art, the invention has two pairs of sealing surfaces, can obviously prolong the service life of the plug valve, is simple and quick when the sealing surfaces are replaced, and does not need to disassemble the plug valve.

Drawings

FIG. 1 is a cross-sectional view of the present invention with the lower plug in a first operating position and the left and right valve flaps in a first operating position;

FIG. 2 is a sectional view of A-A in FIG. 1;

FIG. 3 is a cross-sectional view of the present invention with the lower plug in the second operating position and the left and right flaps in the first operating position;

FIG. 4 is a sectional view of B-B in FIG. 3;

FIG. 5 is a cross-sectional view of the present invention with the lower plug in a second operating position and the left and right valve flaps in a second operating position;

FIG. 6 is a view showing the cross-section C-C of FIG. 5;

FIG. 7 is a cross-sectional view of the present invention with the lower plug in a first operating position and the left and right petals in a second operating position;

FIG. 8 is a sectional view taken along line D-D in FIG. 7;

FIGS. 9-10 are schematic views of the three-dimensional structure of the upper plug, left valve flap, right valve flap and lower plug assembly of the present invention with the left valve flap and right plug in a first operating position;

FIGS. 11-12 are schematic views of the three-dimensional structure of the upper plug, left valve flap, right valve flap and lower plug assembly of the present invention with the left valve flap and right plug in a second operating position;

FIG. 13 is a schematic three-dimensional structure of the upper plug of the present invention;

FIG. 14 is a schematic three-dimensional view of the lower faucet of the present invention;

FIGS. 15-16 are schematic views of the three-dimensional structure of the left flap of the present invention;

fig. 17-18 are schematic three-dimensional structures of a right valve flap of the present invention.

Detailed Description

Referring to fig. 1-18, a plug valve comprises a valve body 1, wherein a valve cavity 1a is arranged in the valve body 1, a valve cover 1b is fixedly arranged at an opening at the upper end of the valve cavity 1a, an inlet pipe 1c and an outlet pipe 1d which are communicated with the valve cavity 1a are arranged on the side surface of the valve body 1, and the inlet pipe 1c and the outlet pipe 1d are coaxially arranged; a lower cock 2 used for controlling the on-off of an inlet pipe 1c and an outlet pipe 1d is rotationally connected in the valve cavity 1a, a valve clack cavity 21 with an open upper end is arranged in the lower cock 2, an upper cock 3 is fixedly arranged at the upper end of the lower cock 2 in the valve cavity 1a, a first through hole 22 and a second through hole 23 communicated with the valve clack cavity 21 are symmetrically arranged in the lower cock 2, a left notch 24 and a right notch 25 communicated with the valve clack cavity 21 are symmetrically arranged on two sides of the first through hole 22 in the lower cock 2, when the lower cock 2 rotates to a first working position, the first through hole 22 is communicated with the inlet pipe 1c, the second through hole 23 is communicated with the outlet pipe 1d, the left notch 24 is disconnected with the inlet pipe 1c, and the right notch 25 is disconnected with the outlet pipe; when the lower cock 2 is turned to the second working position, the first through hole 22 is disconnected from the inlet pipe 1c, the second through hole 23 is disconnected from the outlet pipe 1d, the left notch 24 is communicated with the inlet pipe 1c, and the right notch 25 is communicated with the outlet pipe 1 d; a left valve clack 41 and a right valve clack 42 are symmetrically arranged between the upper plug 3 and the bottom of the valve clack cavity 21; the upper end of the upper plug 3 is provided with a valve rod 3a penetrating through the valve cover 1b, the valve rod 3a is rotatably connected with a shaft rod 5 of which the lower end extends into the valve clack cavity 21, and the lower end of the shaft rod 5 is provided with a transmission assembly for controlling the synchronous rotation of the left valve clack 41 and the right valve clack 42; when the left valve flap 41 and the right valve flap 42 rotate to the first working position, the first through hole 22 is closed by the left valve flap 41, the second through hole 23 is closed by the right valve flap 42, when the left valve flap 41 and the right valve flap 42 rotate to the second working position, the first through hole 22 is opened by the left valve flap 41 and is positioned in the left notch 24, the second through hole 23 is opened by the right valve flap 42 and is positioned in the right notch 25, and the outer side surfaces of the left valve flap 41 and the right valve flap 42 and the outer side surface of the lower plug 2 are positioned in the same curved surface.

The transmission assembly comprises a left connecting rod 51 and a right connecting rod 52, the lower end of the shaft rod 5 is symmetrically provided with a left lug 5a and a right lug 5b, one end of the left connecting rod 51 is hinged on the left valve clack 41, the other end of the left connecting rod is hinged on the left lug 5a, one end of the right connecting rod 52 is hinged on the right valve clack 42, and the other end of the right connecting rod 52 is hinged on the right lug 5 b; the bottom of valve clack cavity 21 and the lower extreme of going up plug 3 are central symmetry and are equipped with a left groove 201 and a right groove 203 to and two grooves 202 on the left side and two grooves 204 on the right side, the both ends of left valve clack 41 are equipped with and stretch into a left projection 411 in the first groove 201 on the left side, and stretch into two projections 412 on the left side in the second groove 202 on the left side, the both ends of right valve clack 42 are equipped with and stretch into a right projection 421 in the first groove 203 on the right side, and stretch into two right projections 422 in the two grooves 204 on the right side.

The left first groove 201 comprises a left first arc groove and a left first straight groove which are communicated with each other, and the left second groove 202 comprises a left second arc groove and a left second straight groove which are communicated with each other; the right groove 203 comprises a right arc groove and a right straight groove which are communicated with each other; the right second groove 204 comprises a right second arc groove and a right second straight groove which are communicated with each other; when the left valve flap 41 and the right valve flap 42 rotate to the first working position, the left first convex column 411 is located at the end of the left straight groove, the left second convex column 412 is located at the end of the left second straight groove, the right first convex column 421 is located at the end of the right straight groove, and the right second convex column 422 is located at the end of the right second straight groove; when the left valve flap 41 and the right valve flap 42 rotate to the second working position, the left convex column 411 is located at the end of the left arc groove, the left convex column 412 is located at the end of the left arc groove, the right convex column 421 is located at the end of the right arc groove, and the right convex column 422 is located at the end of the right arc groove.

The valve cover 1b is provided with a sealing ring 3b on the outer side of the valve rod 3 a. And a handle rod 6 is fixedly arranged at the upper end of the valve rod 3 a. The upper end of the handle rod 6 is fixedly provided with a first positioning disc 61, the upper end of the shaft rod 5 is fixedly provided with a first handle 7, the first handle 7 is hinged with a first positioning rod 62, a first spring 63 is arranged between the first handle 7 and the first positioning rod 62, and the first spring 63 is used for forcing one end of the first positioning rod 62 to abut against the outer side of the circumference of the first positioning disc 61.

As shown in fig. 1-2, the left flap 41 and the right flap 42 are at the first working position, and the lower plug 2 is at the first working position, and the plug valve is at the closed position, when the plug valve needs to be opened, the handle lever 6 rotates the valve rod 3a, the valve rod 3a rotates to drive the lower plug 2 to rotate through the upper plug 3, and when the lower plug 2 rotates to the second working position, as shown in fig. 3-4, the left notch 24 is communicated with the inlet pipe 1c, the right notch 25 is communicated with the outlet pipe 1d, so as to open the plug valve, and in the process, the sealing surface outside the circumference of the lower plug 2 forms contact sealing with the inner wall of the valve cavity 1 a.

When the sealing surface on the outer side of the circumference of the lower plug 2 is worn or scraped, the first positioning rod 62 is held to enable one end to be separated from the first positioning disk 61, then the first handle 7 is rotated to drive the shaft rod 5 to rotate, the shaft rod 5 drives the left valve clack 41 to rotate along the left first groove 201 and the left second groove 202 through the left connecting rod 51 when rotating, and simultaneously drives the right valve clack 42 to rotate along the right first groove 203 and the right second groove 204 through the right connecting rod 52, as shown in fig. 5-6, the left valve clack 41 and the right valve clack 42 are controlled to rotate to the second working position, at the moment, the lower plug 2 is in the first working position, the inlet pipe 1c is communicated with the first through hole 22, the outlet pipe 1d is communicated with the second through hole 23, the first through hole 22 is opened by the left valve clack 41, the second through hole 23 is opened by the right valve clack 42, the plug is in an opened state, the valve rod 3a is driven to rotate through the handle 6, when the lower plug 2 is turned to the second operating position, as shown in fig. 7-8, the inlet pipe 1c is closed by the left flap 41 located in the left notch 24 and the outlet pipe 1d is closed by the right flap 42 located in the right notch 25, during which the sealing surfaces on the outside of the circumferences of the left and right flaps 41, 42 form a contact seal with the inner wall of the valve chamber 1 a. Compared with the prior art, the plug valve has two pairs of sealing surfaces, the service life of the plug valve can be obviously prolonged, the sealing surfaces can be replaced simply and quickly, and the plug valve does not need to be disassembled.

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.