CN-121977081-A - High-pressure sealing stop valve

CN121977081ACN 121977081 ACN121977081 ACN 121977081ACN-121977081-A

Abstract

The invention provides a high-pressure sealing stop valve which comprises a valve body, wherein the valve body is provided with an inner cavity, a first oil way and a second oil way are arranged at the bottom of the valve body, one end of the first oil way is led in from the bottom of the inner cavity, one end of the second oil way is led in from one side of the bottom of the inner cavity, one end of a valve rod is inserted into the inner cavity, one end of the valve rod is inserted into a valve disc, the other end of the valve rod is exposed out of the valve body, the valve rod moves along the length direction of the inner cavity by rotating the other end of the valve rod, a threaded sleeve is fixed through a buckle structure, the valve rod penetrates through the threaded sleeve, and the contact area of the valve rod is trapezoidal threads. The valve rod passes through the threaded sleeve through the buckle type structure to be fixed, and its contact area is trapezoidal screw thread, improves sealing ability by a wide margin, helps solving among the prior art and lacks a stop valve structure and can improve sealing ability's technical problem by a wide margin.

Inventors

KONG WEIAN
LV YANWEN
FAN CHENGYU
YU YAO
WANG YINYING
JIN NING
ZHANG YINGXIAO
WANG XUETONG
WANG LEI
Bao Maoxin

Assignees

上海沪东造船阀门有限公司

Dates

Publication Date: 20260505
Application Date: 20260128

Claims (10)

1. A high pressure seal shut-off valve, comprising: The valve body (1) is provided with an inner cavity (100), a first oil way (101) and a second oil way (102) are arranged at the bottom of the valve body (1), one end of the first oil way (101) is communicated with the bottom of the inner cavity (100), and one end of the second oil way (102) is communicated with one side of the bottom of the inner cavity (100); A valve rod (5) with one end inserted into the internal cavity (100), wherein a valve disc (2) is arranged at one inserted end of the valve rod (1), one end of the first oil path (101) is blocked or loosened by the valve disc (2) to realize the blocking and communication between one end of the first oil path (101) and one end of the second oil path (102), the other end of the valve rod (5) is exposed out of the valve body (1), and the valve rod (5) is moved along the length direction of the internal cavity (100) by rotating the other end of the valve rod (5); the threaded sleeve (9) is fixed through a buckle type structure, the valve rod (5) penetrates through the threaded sleeve (9), and the contact area of the valve rod is trapezoidal threads.
2. The high-pressure sealing stop valve according to claim 1, wherein a hand wheel (10) is fixed on the other end of the valve rod (5), the other end of the valve rod (5) is provided with a polygonal cross section and is matched with the hand wheel (10), the other end of the valve rod (5) is provided with a stud (14), and the stud is pressed and fixed through a hexagonal nut (19), so that the valve rod (5) synchronously rotates when the hand wheel (10) rotates.
3. The high pressure seal shutoff valve of claim 2, wherein the high pressure seal shutoff valve includes: the packing pressing sleeve (7) is coaxially sleeved between the valve rod (5) and the valve body (1) and is fixed with the valve body (1) through threads; And the hexagonal lock nut (8) is sleeved on the packing pressing sleeve (7) and is pressed on the end face of the valve body (1) through threads.
4. A high pressure sealing shut-off valve according to claim 3, characterized in that the valve body (1) is inserted into the inner cavity (100) at one end of the valve rod (5) and is provided with a first step (103), and a packing pad (6) and a packing (11) are arranged between the first step (103) and the end face of the packing pressing sleeve (7); An O-shaped ring-1 (19) is arranged between the outer wall of the packing pressing sleeve (7) and the inner wall of the valve body (1).
5. The high-pressure sealing shut-off valve according to claim 4, characterized in that a wire lock ring (17) is arranged between the valve disc (2) and the valve body (1).
6. A high-pressure sealing shut-off valve according to claim 5, characterized in that a ball (13) is arranged between the valve stem (1) and the valve disk (2) as a ball.
7. The high-pressure sealing stop valve according to claim 6, wherein the valve body (1) abuts against a second step at the bottom of the internal cavity (100), and a metal composite gasket (12) is pressed between the valve body (1) and the second step (104).
8. The high-pressure sealing shut-off valve according to claim 7, characterized in that the valve stem (5) is located below the position of the packing press sleeve (7) and is screw-fitted with the valve body (1).
9. The high-pressure sealing shut-off valve according to claim 8, characterized in that the valve body (1) has a valve cap (3) of long diameter.
10. The high-pressure sealing shut-off valve according to claim 9, characterized in that the valve cap (3) is fixed (20) by means of hexagonal bolts and nuts.

Description

High-pressure sealing stop valve Technical field: The invention relates to the technical field of valve structural design, in particular to a high-pressure sealing stop valve. The background technology is as follows: The high-pressure stop valve is used as a pipe fitting control element in a pipeline system, a relatively complete technical system is formed through century history development, the technology is continuously improved along with the time development, and the high-pressure stop valve can be divided into a mechanical driving stage, a material and structure optimizing stage, an intelligent and special technology fusion stage and a limit performance breakthrough stage according to the driving and sealing modes. The early high-pressure stop valve mechanical driving structure is simpler, the tightness depends on machining precision and pretightening force control, the core defects are that a metal contact surface is easy to wear under a high-pressure vibration working condition, the pretightening force is attenuated to cause poor sealing stability, leakage risk index is increased after frequent opening, a certain degree of optimization is carried out on a valve structure by introducing corrosion-resistant alloy, high-molecular sealing plastic and other materials into a base material of a valve part in a later material structure optimization stage, so that the sealing performance and service life of the valve are greatly improved, the intellectualization is introduced into the design of the valve, a sensor is introduced to monitor areas such as a valve cavity and the like, so that the valve has certain sensing capability, and a memory alloy is introduced into the material, the self-compensating design is combined to enable the sealing performance of the valve to be higher than that of a higher floor, and then the final limit performance breakthrough stage is carried out in a laboratory in the United states, for example, nano-crystal nickel is adopted for manufacturing a valve rod, compared with the traditional 316L stainless steel, the acoustic emission monitoring device developed by a Simen can identify 0.1, mm-level damage to a sealing surface, self-sensing shape stop valve is integrated with a grating sensor under the working condition of 6 MPa to 6m, and the leakage of hydrogen is realized under the working condition of 6-6 Pa/6 m. There is an urgent need for a high-pressure sealing stop valve, which helps to solve the technical problem that the sealing capability can be greatly improved due to the lack of a stop valve structure in the prior art. The invention comprises the following steps: In an embodiment, the invention provides a high-pressure sealing stop valve, which is fixed through a threaded sleeve buckle type structure, the valve rod passes through the threaded sleeve, and the contact area of the valve rod is trapezoidal threads, so that the sealing capability is greatly improved, and the technical problem that the sealing capability can be greatly improved due to the lack of a stop valve structure in the prior art is solved. The high-pressure sealing stop valve includes: The valve body is provided with an inner cavity, a first oil way and a second oil way are arranged at the bottom of the valve body, one end of the first oil way is communicated with the bottom of the inner cavity, and one end of the second oil way is communicated with one side of the bottom of the inner cavity; The valve rod is inserted into the inner cavity at one end, a valve disc is arranged at one inserted end of the valve rod, one end of the first oil way is blocked or loosened through the valve disc, so that one end of the first oil way is blocked and communicated with one end of the second oil way, the other end of the valve rod is exposed out of the valve body, and the valve rod is enabled to move along the length direction of the inner cavity by rotating the other end of the valve rod; the thread bush is fixed through the buckle type structure, the valve rod penetrates through the thread bush, and the contact area of the valve rod is trapezoidal threads. In an embodiment, a hand wheel is fixed at the other end of the valve rod, the other end of the valve rod is provided with a polygonal section and is matched with the hand wheel, the end part of the other end of the valve rod is provided with a stud, and the stud is fixed through pressing of a hexagonal nut, so that the valve rod synchronously rotates when the hand wheel rotates. In one embodiment, the high pressure sealing shut-off valve comprises: The packing pressing sleeve is coaxially sleeved between the valve rod and the valve body and is fixed with the valve body through threads; And the hexagonal lock nut is sleeved on the packing pressing sleeve and is pressed on the end face of the valve body through threads. In one embodiment, the first step is arranged on the inner cavity of one end of the valve body inserted into the valve rod, and a packing pad an