CN217003109U

CN217003109U - Upper thread valve rod stop valve with pilot composite valve clack mechanism

Info

Publication number: CN217003109U
Application number: CN202220798210.XU
Authority: CN
Inventors: 项策; 陈永刚; 薛纪亥; 汪德维
Original assignee: Tanggong Valve Group Co ltd
Current assignee: Tanggong Valve Group Co ltd
Priority date: 2022-04-07
Filing date: 2022-04-07
Publication date: 2022-07-19
Anticipated expiration: 2032-04-07

Abstract

The utility model discloses an upper thread valve rod stop valve with a pilot composite valve clack mechanism, which comprises a hand wheel, a valve cover, a valve body and a valve rod, wherein a main sealing surface is arranged in the valve body, the valve cover is fixedly connected to the upper surface of the valve body, the valve rod is arranged in the valve body and the valve cover, the hand wheel drives the valve rod to rotate and axially move, and the upper thread valve rod stop valve is characterized in that: the lower end of the valve rod is clamped with the inner valve clack, the main valve clack is sleeved on the inner valve clack by the turnbuckle in an axially movable manner, the inner valve clack sealing surface of the inner valve clack and the inner sealing surface of the main valve clack form a pair of sealing pairs, the outer sealing surface of the main valve clack and the main sealing surface in the valve body form a pair of sealing pairs, and the circumferential wall of the upper side of the inner sealing surface of the main valve clack is provided with a hole for communicating the inside and the outside. According to the technical scheme, the inner valve clack is opened first, and then the main valve clack is opened, so that the whole valve is opened in a labor-saving manner.

Description

Upper thread valve rod stop valve with pilot composite valve clack mechanism

Technical Field

The utility model relates to a stop valve, in particular to an upper threaded valve rod stop valve with a pilot composite valve clack mechanism.

Background

The existing upper thread valve rod stop valve adopts a valve rod lower end annular groove to arrange a split double-half metal ring, a valve clack is fixedly connected with a threaded sleeve sleeved on a valve rod, and the valve rod drives the valve clack to move to open and stop the valve through the axial movement effect of the double-half metal ring in the valve clack. The force required to be opened when the upper threaded valve rod stop valve with the large drift diameter is used is increased in proportion to the drift diameter area, so that the diameter of a hand wheel is large, and gear pairs are additionally arranged in some cases, so that the upper threaded valve rod stop valve is large in size, high in cost, labor-consuming to operate and short in service life.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects and shortcomings of the prior art and provide an upper threaded valve rod stop valve with a pilot composite valve clack mechanism.

The technical scheme of the utility model is that the upper thread valve rod stop valve with a pilot composite valve clack mechanism comprises a hand wheel, a valve cover, a valve body and a valve rod, wherein a main sealing surface is arranged in the valve body, the valve cover is fixedly connected to the upper surface of the valve body, the valve rod is arranged in the valve body and the valve cover, the hand wheel rotates the valve rod to form axial movement of thread drive through the matching of threads on the upper part of the valve rod and internal threads of the valve cover, the upper thread valve rod stop valve also comprises the pilot composite valve clack mechanism, the pilot composite valve clack mechanism comprises a threaded sleeve, an inner valve clack and a main valve clack, the lower end of the inner valve clack comprises an inner valve clack sealing surface, an outer sealing surface and a central through hole, the lower end of the valve rod is connected with the inner valve clack, the main valve clack is axially movably sleeved on the inner valve clack by the threaded sleeve, and the inner valve clack sealing surface of the inner valve clack and the inner sealing surface of the main valve clack form a pair, the outer sealing surface of the main valve flap and the main sealing surface in the valve body form a pair of sealing pairs, and the circumferential wall on the upper side of the inner sealing surface of the main valve flap is provided with a hole for communicating the inside and the outside.

According to the technical scheme, the pilot composite valve clack mechanism is adopted, namely the inner valve clack is opened firstly and then the main valve clack is opened, so that the sealing area of the inner valve clack is small in the opening process of the valve, the force required to be opened is small, after the inner valve clack is opened, the effective area acting on the main valve clack is only the size of a sealing pair, the pressure difference between the inlet side and the outlet side of the medium of the main valve clack is greatly reduced, the force acting on the main valve clack is obviously reduced, and the whole valve is opened with great labor saving.

Furthermore, the lower end of the valve rod is connected with the inner valve clack in a clamping manner.

And a liquid storage cavity is further arranged at the lower part of the inner cavity of the main valve flap.

Furthermore, the circumferential wall of the main valve flap is provided with holes communicated with the inside and the outside, and two, four or six holes are uniformly distributed on the circumference.

Furthermore, the hole on the circumferential wall of the main valve flap forms an included angle of 5 degrees with the plane of the inner sealing surface.

And further, the filler is arranged in the valve cover, and a fastener connected with the valve cover compresses the filler through a filler pressing plate and a filler pressing sleeve to be used for sealing the screw in the inner hole of the valve cover.

Further, the sealing surfaces of the main valve flap, the inner valve flap and the valve body are sprayed with hard alloy at high temperature, and the coating thickness is 0.2 mm.

According to the technical scheme, the space between the inner valve clack and the main valve clack is enlarged, when the inner valve clack is opened, a medium enters the outlet of the valve body from the inlet of the valve body through the plurality of inclined holes in the circumferential wall of the main valve clack, the liquid storage cavity between the inner valve clack and the main valve clack and the central through hole of the main valve clack, the impact in the opening process is small, the pressure difference between the inlet and the outlet of the valve body is reduced, the sealing surface between the main valve clack and the valve body is opened, the sealing surface is strengthened, the whole opening process is smooth and easy, labor is saved, the hand feeling is good, and the service life of the valve is long.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is within the scope of the present invention for those skilled in the art to obtain other drawings based on the drawings without creative efforts;

FIG. 1 is a schematic structural diagram of an upper threaded valve stem stop valve with a pilot composite valve flap mechanism according to the utility model;

FIG. 2 is an enlarged, partial A cross-sectional view of the upper threaded stem shut-off valve of the present invention having a pilot combination clapper mechanism;

in the figure, 1-round hand wheel, 2-loose joint bolt, 3-packing press plate, 4-packing press sleeve, 5-packing, 6-valve cover, 7-valve body, 701-main sealing surface, 8-valve rod, 801-clamping groove, 9-thread sleeve, 10-inner valve flap, 101-inner valve flap sealing surface, 11-main valve flap, 111-main valve flap side hole, 112 inner sealing surface, 113-outer sealing surface and 114-liquid storage cavity.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.

The embodiment of the upper thread valve rod stop valve with the pilot composite valve clack mechanism of the utility model shown in fig. 1 and 2 comprises a circular hand wheel 1, a loose joint bolt 2, a packing pressing plate 3, a packing pressing sleeve 4, a packing 5, a valve cover 6, a valve body 7, a valve rod 8, a threaded sleeve 9, an inner valve clack 10 and a main valve clack 11; the valve cover 6, the valve body 7, the valve rod 8, the threaded sleeve 9, the inner valve clack 10 and the main valve clack 11 are made of stainless steel materials, and the circular hand wheel 1, the loose joint bolt 2, the packing pressing plate 3 and the packing pressing sleeve 4 are made of carbon steel.

The valve body 7 is fixedly connected with the valve cover 6, the filler 5 is arranged in the valve cover 6, and the filler 5 is tightly pressed by a filler pressing sleeve 4 through a filler pressing plate 4 and a slipknot bolt 2 connected with the valve cover 6 and is used for sealing a screw 8 in an inner hole of the valve cover 6; the lower end of a screw rod 8 is arranged in a valve body 7, an inner valve clack 10 is axially fixedly clamped on a clamping groove 801 at the lower end of a valve rod 8, the lower end of the inner valve clack 10 comprises an inner valve clack sealing surface 101, the upper part of an inner cavity of a main valve clack 11 is provided with threads and the lower part is provided with a through hole, the main valve clack 11 is axially movably sleeved on the inner valve clack 10 by a screw sleeve 9, the inner valve clack sealing surface 101 of the inner valve clack 10 and an inner sealing surface 112 of the main valve clack 11 form a pair of sealing pairs, an outer sealing surface 113 of the main valve clack 11 and a main sealing surface 701 in the valve body 7 form a pair of sealing pairs, the upper end of the valve rod 7 is connected with a hand wheel 1, a valve cover 6 below the hand wheel 1 is provided with an inner thread sleeve, the valve rod 7 is rotated by the hand wheel 1, the threads at the upper part of the valve rod 7 are matched with the inner threads of the valve cover 6 to form axial movement, and the valve cover 7 drives the inner valve clack 10 and the main valve clack 11 to form the stop and open of the valve. The main valve flap 11 further comprises a main valve flap side hole 111 and a liquid storage cavity 114, medium enters the liquid storage cavity 114 through the main valve flap side hole 111, when the valve is opened, the valve rod 7 firstly drives the inner valve flap sealing surface 101 of the inner valve flap 10 to be separated from the inner sealing surface 112 of the main valve flap 11, then the inner valve flap 10 drives the main sealing surface 11 sleeved outside the inner valve flap 10, and finally, a pair of sealing pairs formed by the outer sealing surface 113 of the main valve flap 11 and the main sealing surface 701 in the valve body 7 are separated, so that the valve is completely opened. Two, four or six main valve side holes 111 are uniformly distributed on the circumferential wall of the upper side of the inner sealing surface 112 of the main valve 11, and the included angle between the main valve side holes 111 and the horizontal plane is 5 degrees. In order to prolong the service life of the valve, two pairs of sealing pairs are subjected to strengthening treatment, all sealing surfaces are sprayed with hard alloy at high temperature, and the thickness of the coating is 0.2 mm.

According to the technical scheme, the pilot composite valve clack mechanism is adopted, namely the inner valve clack is opened firstly and then the main valve clack is opened, so that the sealing area of the inner valve clack is small in the opening process of the valve, the force required to be opened is small, after the inner valve clack is opened, the valve is filled with media, the effective area acting on the main valve clack is only the size of a sealing pair, the force acting on the main valve clack is obviously reduced, the sealing surface is subjected to strengthening treatment, and the whole valve is opened in a labor-saving mode and is long in service life.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the scope of the present invention is not to be limited by the embodiments, and therefore, the appended claims are intended to cover all such modifications and changes as fall within the true spirit and scope of the utility model.

Claims

1. Last screw thread valve rod stop valve with guide's compound valve clack mechanism, including hand wheel, valve gap, valve body and valve rod, be provided with the main seal face in the valve body, fixed connection valve gap above the valve body, the valve rod sets up the inside at valve body and valve gap, hand wheel rotation valve rod pass through the screw thread on valve rod upper portion with the interior screw-thread fit of valve gap forms screw thread driven axial displacement, its characterized in that: the lower end of the valve rod is connected with the inner valve clack, the main valve clack is sleeved on the inner valve clack in an axially movable manner by the threaded sleeve, the inner valve clack sealing surface of the inner valve clack and the inner sealing surface of the main valve clack form a pair of sealing pairs, the outer sealing surface of the main valve clack and the main sealing surface in the valve body form a pair of sealing pairs, and holes for communicating the inside and the outside are formed in the circumferential wall of the upper side of the inner sealing surface of the main valve clack.

2. The upper threaded stem shut-off valve with pilot compound flap mechanism of claim 1, wherein: the lower end of the valve rod is connected with the inner valve clack in a clamping manner.

3. The upper threaded stem shut-off valve with pilot compound flap mechanism of claim 2, wherein: the lower part of the inner cavity of the main valve flap is provided with a liquid storage cavity.

4. The upper threaded stem shut-off valve with pilot composite flap mechanism of claim 3, wherein: the circumferential wall of the main valve flap is provided with holes communicated with the inside and the outside, and two, four or six holes are uniformly distributed on the circumference.

5. The upper threaded stem shut-off valve with pilot composite flap mechanism according to any one of claims 1 to 4, characterized in that: the holes on the circumferential wall of the main valve flap form an included angle of 5 degrees with the plane of the inner sealing surface.

6. The upper threaded stem shut-off valve with pilot composite flap mechanism of claim 5, wherein: the valve cover is internally provided with filler, and a fastener connected with the valve cover compresses the filler through a filler pressing plate and a filler pressing sleeve to be used for sealing a screw in an inner hole of the valve cover.

7. The upper threaded stem shut-off valve with pilot compound flap mechanism of claim 6, wherein: the sealing surfaces of the main valve flap, the inner valve flap and the valve body are provided with hard alloy coatings with the thickness of 0.2 mm.