CN213954387U

CN213954387U - Pilot-operated high-pressure flat valve

Info

Publication number: CN213954387U
Application number: CN202022278317.5U
Authority: CN
Inventors: 申宝明; 王延坡
Original assignee: Shanghai Hailufeng Marine Valve Co ltd
Current assignee: Shanghai Hailufeng Marine Valve Co ltd
Priority date: 2020-10-13
Filing date: 2020-10-13
Publication date: 2021-08-13
Anticipated expiration: 2030-10-13

Abstract

The pilot-operated high-pressure flat valve is characterized in that a square groove (D) is horizontally and transversely formed in the outer wall of a valve seat (E), two guide holes (4) communicated with a valve cavity in a valve body (1) are formed in the square groove (D), inner end openings of the two guide holes (4) are respectively located on two sides of a valve plate (B) in the valve seat (E), a guide plate (2) is fixed in the square groove (D) through screws (3), bypass holes (C) with four openings are formed in the guide plate (2), two openings are formed in two ends of the guide plate (2) of each bypass hole (C), stop valves (F) are respectively installed on the two ends of each bypass hole (C), two openings corresponding to the guide holes (4) are formed in the middle of the inner side of the guide plate (2), and the guide plate (2) is communicated with the two guide holes (4) through the two openings. The pressure on the two sides of the flashboard B is reduced in advance, the moment when the high-pressure flat valve is opened and closed is reduced, and the opening and closing speed is increased; reasonable structure, convenient operation and reliable sealing. Improve work efficiency, reduce intensity of labour.

Description

Pilot-operated high-pressure flat valve

Technical Field

The utility model relates to a structural improvement technique of wafer valve equipment, especially guide's formula high pressure wafer valve.

Background

A flat gate valve is a sliding valve whose closing member is a parallel gate plate. The closing member can be a single gate or a double gate with a spreader mechanism in between. The pressing force of the gate plate to the valve seat is controlled by the medium pressure acting on the floating gate plate or the floating valve seat. In the case of a double-gate plate gate valve, the pressing force can be supplemented by a spreading mechanism between the two gate plates.

The plate gate valve may be classified into a manual plate gate valve, a pneumatic plate gate valve, and an electric plate gate valve according to a driving manner. The gate valve can be divided into a plate gate valve with a diversion hole, a plate gate valve without a diversion hole, an oil field plate gate valve, a pipeline plate gate valve, a gas plate gate valve and the like according to the application and the use occasion.

At present, the problem of overlarge switching torque during high pressure is solved by adding a transmission device or using hydraulic pressure as the driving force of a valve switch in a common high-pressure flat valve. The high-pressure flat valve with the transmission device has the advantages of low switching speed and low efficiency, and increases the labor intensity of workers. These improvements also generally have the disadvantage of being complex and prone to failure.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a guide's formula high pressure wafer valve solves the big problem of switch moment when the high pressure wafer valve is high-pressure among the above prior art.

The purpose of the utility model is realized by the following technical measures: a pilot-operated high-pressure flat valve comprises a valve body, a valve plate and a valve seat; the valve seat is characterized in that a square groove is horizontally and transversely formed in the outer wall of the valve seat, two guide holes communicated with a valve cavity in the valve body are formed in the square groove, inner end openings of the two guide holes are respectively located on two sides of a valve plate in the valve seat, then the guide plate is fixed in the square groove through screws, correspondingly, a bypass hole with four openings is formed in the guide plate, two openings are respectively formed in two ends of the guide plate, stop valves are respectively installed on the two ends of the guide plate, two openings corresponding to the guide holes are formed in the middle of the inner side of the guide plate, and the guide plate is communicated with the two guide holes through the two openings.

Particularly, the two stop valves are respectively positioned at two ends of the guide plate, namely two sides of the valve seat, each stop valve comprises a valve rod, sealing packing, a packing gland, a part of guide holes and a part of bypass holes, the inner section of the valve rod is screwed into the end part of each bypass hole, the sealing packing is arranged between the outer edge of the outer section of the valve rod and the inner wall of the outer section of each bypass hole, and the packing gland is screwed on the outer side of the sealing packing.

In particular, the outer end of the valve rod is provided with an inner hexagonal hole.

In particular, the square groove, the guide plate and the guide hole are positioned in the middle of the valve seat.

In particular, the inner diameters of the bypass holes and the diversion holes are the same.

The utility model discloses an advantage and effect: the guide hole-stop valve matched pilot structure is arranged, so that the torque is reduced, the structure is reasonable, the operation is light, and the sealing is reliable. Improve work efficiency, reduce intensity of labour.

Drawings

FIG. 1 is a schematic view of the main assembly of the present invention;

FIG. 2 is a schematic diagram of the side view structure of the assembly of the present invention;

FIG. 3 is a schematic cross-sectional view of the structure of FIG. 1A-A;

fig. 4 is an enlarged schematic view of a portion I in fig. 3.

The reference numerals include:

1-a valve body; 2-a flow guide plate; 3-screws; 4-diversion holes; 5-a packing gland; 6-valve stem; 7-sealing packing. B-valve plate, bypass hole C, D-square groove, E-valve seat, F-stop valve.

Detailed Description

In the utility model, after the diversion holes 2 are arranged on the two sides of the valve seat E, the pressure on the two sides of the flashboard B is reduced in advance by adopting the matched control of the two additional stop valves F to form a front bypass diversion, thereby reducing the pressure difference change amplitude on the two sides of the flashboard B, reducing the moment when the high-pressure flat valve is opened and closed and improving the opening and closing speed of the high-pressure flat valve; the high-pressure flat valve is not only suitable for manual operation, but also can be matched with a gearbox, an electric device and a hydraulic device for use, and is suitable for popularization and use.

The present invention will be further explained with reference to the drawings and examples.

Example 1: a pilot-operated high-pressure flat valve comprises a valve body 1, a valve plate B and a valve seat E; a square groove D is horizontally and transversely formed in the outer wall of a valve seat E, two diversion holes 4 communicated with a valve cavity in a valve body 1 are formed in the square groove D, inner end openings of the two diversion holes 4 are respectively located on two sides of a valve plate B in the valve seat E, then a guide plate 2 is fixed in the square groove D through screws 3, correspondingly, bypass holes C with four openings are formed in the guide plate 2, the two ends of the guide plate 2 are respectively provided with an opening, a stop valve F is respectively installed at each end of the bypass hole C, the middle part of the inner side of the guide plate 2 is provided with two openings respectively corresponding to the diversion holes 4, and the guide plate 2 communicates the bypass holes C with the two diversion holes 4 through the two openings.

In the foregoing, two stop valves F are respectively located at two ends of the guide plate 2, that is, two sides of the valve seat E, each stop valve F is composed of a valve rod 6, a sealing packing 7, a packing gland 5, a part of the guide holes 4 and a bypass hole C, the inner section of the valve rod 6 is screwed into the end part of the bypass hole C, the sealing packing 7 is installed between the outer edge of the outer section of the valve rod 6 and the inner wall of the outer section of the bypass hole C, and the packing gland 5 is screwed on the outer side of the sealing packing 7.

In the foregoing, the square groove D, the guide plate 2, and the guide hole 4 are located at the middle position of the valve seat E.

In the foregoing, the inner diameter of the bypass hole C is the same as that of the diversion hole 4.

In the above, the external end of the valve rod 6 has a hexagon socket so as to open and close the stop valve F by using a hexagon socket wrench.

The embodiment of the utility model provides an in, when opening entirely, the passageway is level and smooth straight line in the valve body 1, and the flow resistance coefficient is minimum, no loss of pressure. The totally-enclosed structure has good protection performance and can meet all-weather requirements. When the valve is closed, the high pressure in the inner cavity can be automatically discharged, so that the use safety is ensured. The high-pressure opening and closing torque is only 1/2 of a common high-pressure flat valve, and the valve can be loosened and closed easily. The sealing surfaces are all spray-welded with hard alloy, so that the valve has the advantages of corrosion resistance, wear resistance, erosion resistance and the like, and can be used for throttling. It is especially suitable for the water, oil, slurry and natural gas pipelines with working pressure less than or equal to 42MPa and working temperature less than or equal to 120 ℃ to be used as the opening, closing and adjusting devices for controlling the flow of the medium.

In the embodiment of the utility model, valve seat E has the self-cleaning function to do not receive the direct washing away of air current at the valve opening or the in-process of closing. The valve seat E should be made of a lubricious, non-abrasive material.

In the embodiment of the utility model, when the pilot-operated high-pressure flat valve needs to be opened, the valve rod 6 of the stop valve F is firstly rotated to open the stop valve F, so that the medium pressures on the two sides of the flashboard B are balanced, and the friction force between the flashboard B and the valve seat E caused by the pressure difference is reduced, thereby reducing the opening torque of the pilot-operated high-pressure flat valve; when the pilot type high-pressure flat valve is completely opened, the valve rod 6 is rotated to close the stop valve F.

In the embodiment of the utility model, when the pilot-operated high-pressure flat valve needs to be closed, the valve rod 6 is firstly rotated to open the stop valve F, and the flow guide flow path of the bleeding bypass is firstly decompressed, so that the medium pressure at the two sides of the flashboard B is balanced, and the friction between the flashboard B and the valve seat E caused by pressure difference is reduced, thereby reducing the closing torque of the pilot-operated high-pressure flat valve; when the pilot type high-pressure flat valve is completely closed, the valve rod 6 is rotated to close the stop valve F.

Claims

1. The pilot-operated high-pressure flat valve comprises a valve body (1), a valve plate (B) and a valve seat (E); the novel valve is characterized in that a square groove (D) is horizontally and transversely formed in the outer wall of a valve seat (E), two guide holes (4) communicated with a valve cavity in a valve body (1) are formed in the square groove (D), inner end openings of the two guide holes (4) are respectively located on two sides of a valve plate (B) in the valve seat (E), then a guide plate (2) is fixed in the square groove (D) through screws (3), correspondingly, bypass holes (C) with four openings are formed in the guide plate (2), each of two ends of each guide plate (2) of each bypass hole (C) is provided with an opening, a stop valve (F) is respectively installed on each of the two ends of each bypass hole (C), two openings corresponding to the guide holes (4) are formed in the middle of the inner side of the guide plate (2), and the guide plate (2) is communicated with the two guide holes (4) through the two openings.

2. The pilot-operated high-pressure flat valve according to claim 1, wherein two stop valves (F) are respectively provided at both ends of the guide plate (2), i.e., both sides of the valve seat (E), the stop valves (F) are formed by a valve stem (6), a packing (7), and a packing cover (5), and a portion of the guide hole (4) and the bypass hole (C), an inner section of the valve stem (6) is screwed into an end portion of the bypass hole (C), the packing (7) is installed between an outer edge of an outer section of the valve stem (6) and an inner wall of an outer section of the bypass hole (C), and the packing cover (5) is screwed to an outer side of the packing (7).

3. Pilot-operated high-pressure plate valve according to claim 1, characterised in that the outer end of the valve stem (6) has a hexagonal socket.

4. Pilot-operated high-pressure flat valve according to claim 1, characterized in that the square groove (D), the deflector (2) and the deflector orifice (4) are located in the middle of the valve seat (E).

5. Pilot-operated high-pressure flat valve according to claim 1, characterized in that the bypass opening (C) has the same inner diameter as the pilot opening (4).