CN220581724U

CN220581724U - High-temperature high-pressure double-flat gate valve

Info

Publication number: CN220581724U
Application number: CN202320738390.7U
Authority: CN
Inventors: 林时庆; 贺乐全; 宁静; 刘明杰; 谷成明
Original assignee: Huanqiu Valve Group Co ltd
Current assignee: Huanqiu Valve Group Co ltd
Priority date: 2022-05-18
Filing date: 2023-04-06
Publication date: 2024-03-12
Anticipated expiration: 2033-04-06

Abstract

The utility model relates to the technical field of valves, and overcomes the defect that a valve rod of the existing double-plate gate valve is easy to bend and break, and the valve comprises a valve body, wherein a valve seat is fixedly connected in the valve body, a flashboard is arranged in the valve seat, and the flashboard realizes the opening and closing of the valve body by the traction of the valve rod, and is characterized in that: the valve rod is characterized in that the flashboard is connected with the valve rod through a flashboard frame, a T-shaped groove is formed in the flashboard frame and is connected with the valve rod through the T-shaped groove, valve seats on two sides of the flashboard are fixed with the valve body through welding to form a valve body assembly integrally, two flashboard plates are connected with each other through the flashboard frame into a whole, a spring is arranged between the two flashboard plates, a retaining sleeve for clamping the two flashboard plates is arranged in the flashboard frame, and the flashboard frame, the flashboard plate and the retaining sleeve are combined to form the flashboard assembly. Simple structure, and convenient production, processing and maintenance.

Description

High-temperature high-pressure double-flat gate valve

Technical Field

The utility model relates to the technical field of valves, in particular to a high-temperature high-pressure double-flat-plate gate valve.

Background

On high-temperature and high-pressure pipelines such as thermal power generation, petrochemical industry and metallurgy, more and more gate valves adopt parallel gate plate structures, the main reasons are that compared with wedge gate valves, the flat gate valves have obvious advantages, particularly, large-caliber gate valves, the wedge gate valves have poor sealing performance due to the existence of sealing angles and errors in processing, leakage is easy to occur, and in order to achieve good sealing, larger force needs to be applied to cause large valve torque, and the risk of being not opened due to wedge death exists. The flat gate valve has the characteristics of small opening and closing moment, high sealing reliability and the like compared with a wedge gate valve because the flat gate valve cancels the sealing angle.

The prior high-temperature high-pressure double-plate gate valve in China mainly comprises three types of screw clamping type structures, an upper end baffle type structure and a wedge type parallel plate structure. The screw clamping type parallel double-gate valve is characterized in that two gate plates are clamped on a gate plate frame by three screws, a pre-tightening spring is arranged between the two gate plates, and a valve rod is in threaded connection with the gate plate frame. The upper end baffle plate type structure parallel double-flashboard gate valve has the advantages that the structure is simple, the use is relatively stable, and the upper end of the upper end baffle plate type structure parallel double-flashboard gate valve is provided with a pre-tightening spring which is arranged between two flashboard plates and is in threaded connection with a flashboard frame. The parallel double-flashboard gate valve with the wedge-type parallel plate structure consists of two flashboards, an expansion block, a wedge block, a guide plate and the like. The screw clamping type structural parts are more, the processing is relatively complex, and the valve rod and the flashboard frame are in threaded connection under the action of medium force, so that the risk of bending fracture is easy to occur due to the fact that the boss is required to be reserved for clamping the flashboard by the screw, the middle cavity of the valve body is enlarged, the integral cost is increased, and the valve rod and the flashboard frame are in threaded connection. The wedge-type parallel plate structure has the principle that the wedge-type gate valve is basically a variety of the wedge-type gate valve, the problem of large torque exists, the structure is complex, the parts are more, the fault is easy to occur, the gear opening is widened due to the structure under the high-pressure environment, the cavity in the valve body is enlarged, the whole cost is increased, and the structure is generally used in the medium-low pressure environment. The upper baffle plate type structure is the most commonly used structure, the structure is simple, the use is stable, but the valve rod and the flashboard frame are in threaded connection, and the risk of bending fracture easily occurs under the action of medium force as in the screw clamping type structure.

Therefore, a new structure of the high-temperature high-pressure double-plate gate valve needs to be developed, and the defect of the traditional high-temperature high-pressure double-plate gate valve is overcome, which is a technical problem that we need to solve currently.

Disclosure of Invention

The purpose of the utility model is that: the high-temperature high-pressure double-flat-plate gate valve is provided to solve the technical problems in the prior art.

According to the above purpose, the basic technical scheme of the utility model is as follows: the utility model provides a high temperature high pressure double flat gate valve, includes the valve body, fixed connection disk seat in the valve body is equipped with the flashboard in the disk seat, the flashboard realize the switching of valve body, its characterized in that through the tractive of valve rod: the flashboard is connected with the valve rod through a flashboard frame, and the flashboard frame is provided with a T-shaped groove and is connected with the valve rod through the T-shaped groove.

Further, the disk seat on flashboard both sides pass through welding and the fixed integrative valve body subassembly that forms of valve body, two flashboards pass through the flashboard frame and connect as an organic wholely, be equipped with the spring in the middle of two flashboard boards, the flashboard frame in be equipped with the fender cover that blocks two flashboard, flashboard frame, flashboard and fender cover combination form the flashboard subassembly, the valve body of valve body subassembly on be equipped with the guide bar, the flashboard frame of flashboard subassembly on be equipped with the guide way, the flashboard subassembly be in through the cooperation of guide way and guide bar the valve body subassembly in the activity from top to bottom.

Further specifically, the flashboard axial excircle on be equipped with the draw-in groove, flashboard frame's T type tank bottom be equipped with the trompil, the fender cover from flashboard frame top card draw-in groove and flashboard frame's T type tank trompil department of flashboard, the excircle of fender cover cooperate with the trompil of flashboard frame, the tetragonal of fender cover with the T type tank cooperation of flashboard frame.

Further specifically, the head of the valve rod is propped against the retaining sleeve, and the retaining sleeve is kept connected with the flashboard frame.

Further, the valve rod pass through the connection pad and install in the valve gap that reciprocates, the valve gap pass through bolt fastening on the valve body, the connection pad pass through the screw and install on the guide pillar, the guide pillar pass through the screw thread to be fixed on the valve gap, the valve rod on be equipped with both ends and slide limiting plate on the guide pillar, the guide pillar on be equipped with the step, the valve rod be in the guide pillar step and the connection pad between safe upper and lower slip.

Further specifically, a supporting and lubricating device is further arranged between the valve rod and the valve cover, the supporting and lubricating device is limited with the axial direction of the valve body through a limiting block and a step, the supporting and lubricating device is connected with the valve cover into a whole through a screw, and the supporting and lubricating device is matched with an inner hole of the valve body radially through an outer circle.

Furthermore, the valve body is formed by forging or casting, and the middle part of the valve body is a bolting joint or a self-sealing joint.

Furthermore, the bottom of the sealing part of the valve body and the flashboard is provided with a hollow groove.

Compared with the prior art, the utility model has the advantages and beneficial effects that:

1. the baffle plate of the product is smaller and better to replace;

2. according to the utility model, the valve rod is connected with the flashboard frame by adopting the T-shaped groove, so that the risk of bending and breaking of the valve rod is avoided;

3. the utility model has compact structure, reliability, durability, simple structure and convenient production, processing and maintenance.

Drawings

FIG. 1 is a schematic cross-sectional structural view of the product of the present utility model;

in the figure: 1. a valve body; 2. a valve seat; 3. a flashboard; 4. a shutter frame; 5. a spring; 6. a blocking sleeve; 7. a valve stem; 8. a valve cover; 9. a guide post; 10. a limiting plate; 11. and a connecting disc.

Detailed Description

Referring to fig. 1, a schematic structural diagram of an embodiment of the high-temperature high-pressure double-plate gate valve product of the utility model is provided, the high-temperature high-pressure double-plate gate valve product comprises a valve body 1, a valve seat 2 is fixedly connected in the valve body 1, a gate plate 3 is arranged in the valve seat 2, the gate plate 3 realizes opening and closing of the valve body 1 through pulling of a valve rod 7, the gate plate 3 is connected with the valve rod 7 through a gate plate frame 4, and a T-shaped groove is arranged on the gate plate frame 4 and is connected with the valve rod 7 through the T-shaped groove; valve seats 2 on two sides of the flashboard 3 are fixed with the valve body 1 into a whole through welding to form a valve body assembly, the two flashboards 3 are connected into a whole through a flashboard frame 4, a spring 5 is arranged between the two flashboard 3, a stop sleeve 6 for clamping the two flashboard 3 is arranged in the flashboard frame 4, the flashboard 3 and the stop sleeve 6 are combined to form the flashboard assembly, a guide rib is arranged on the valve body 1 of the valve body assembly, a guide groove is arranged on the flashboard frame 4 of the flashboard assembly, and the flashboard assembly moves up and down in the valve body assembly through the cooperation of the guide groove and the guide rib; the outer circle of the baffle sleeve 6 is matched with the opening of the baffle plate frame 4, and the square of the baffle sleeve 6 is matched with the T-shaped groove of the baffle plate frame 4; the head of the valve rod 7 is propped against the retaining sleeve 6, and the retaining sleeve 6 is kept connected with the flashboard frame 4.

The valve rod 7 is movably arranged in the valve cover 8 up and down through a connecting disc 11, the valve cover 8 is fastened on the valve body 1 through a bolt, the connecting disc 11 is arranged on a guide post 9 through a screw, the guide post 9 is fixed on the valve cover 8 through threads, a limiting plate 10 with two ends sliding on the guide post is arranged on the valve rod 7, a step is arranged on the guide post 9, and the valve rod 7 safely slides up and down between the step of the guide post 9 and the connecting disc 11; the valve rod 7 and the valve cover 8 are also provided with a supporting and lubricating device, the supporting and lubricating device and the valve body 1 are limited by a limiting block and a step in the axial direction, are connected with the valve cover 8 into a whole by a screw, and are matched with the inner hole of the valve body 1 radially through an outer circle.

The valve body 1 is formed by forging or casting, and the middle part of the valve body 1 is a bolting joint or a self-sealing joint; the bottom of the sealing part of the valve body 1 and the flashboard 3 is provided with a hollow groove.

As shown in fig. 1, the valve body 1 is a high-temperature high-pressure double-flat gate valve body, two valve seats 2 are fixed on the valve body 1 by welding to form a valve body assembly, two gate plates 3 are placed in a gate plate frame 4, a spring 5 is placed between the two gate plates 3, a blocking sleeve 6 is placed in the gate plate frame 4 to clamp the two gate plates 3 to form a gate plate assembly, the valve body 1 is provided with guide ribs, and the gate plate frame 4 is provided with guide grooves. The valve rod 7 is connected with the flashboard frame 4 through a T-shaped groove, the guide post 9 is fixed on the valve cover 8 through threads, the valve body 1 is connected with the valve cover 8 through bolts, and the connecting disc 11 is fixed above the guide post 9 through bolts.

The valve body 1 is connected with the valve cover 8 through bolts, the connecting disc 11 is fixed above the guide column 9 through bolts, the guide column 9 is fixed on the valve cover 8 through threads, excessive parts do not need to be disassembled and assembled during installation and maintenance, and meanwhile, the connecting disc 11 only needs to be changed to meet the requirement of replacement of different actuators.

The high temperature and high pressure dual flat gate valve provided by the present utility model has been described above, and specific preferred embodiments have been applied to illustrate the principles and embodiments of the present utility model, and these embodiments are only for aiding in understanding the principles and core concept of the present utility model, and it should be pointed out that, for those skilled in the art, the embodiments of the present utility model can be further combined or replaced, and several improvements and modifications can be made to the present utility model without departing from the scope of the utility model as defined in the appended claims.

Claims

1. The utility model provides a high temperature high pressure double flat gate valve, includes valve body (1), fixed connection disk seat (2) in valve body (1), is equipped with flashboard (3) in disk seat (2), flashboard (3) realize the switching of valve body (1) through the tractive of valve rod (7), its characterized in that: the flashboard (3) is connected with the valve rod (7) through a flashboard frame (4), and the flashboard frame (4) is provided with a T-shaped groove and is connected with the valve rod (7) through the T-shaped groove; the axial excircle of the flashboard (3) is provided with a clamping groove, and the bottom of the T-shaped groove of the flashboard frame (4) is provided with an opening; the novel high-precision gate plate is characterized in that a blocking sleeve (6) for clamping two gate plates (3) is arranged in the gate plate frame (4), the gate plates (3) and the blocking sleeve (6) are combined to form a gate plate assembly, the blocking sleeve (6) is clamped into a clamping groove of the gate plate (3) and a T-shaped groove opening of the gate plate frame (4) from the upper side of the gate plate frame (4), the outer circle of the blocking sleeve (6) is matched with the opening of the gate plate frame (4), and the square of the blocking sleeve (6) is matched with the T-shaped groove of the gate plate frame (4); the head of the valve rod (7) is propped against the retaining sleeve (6), and the retaining sleeve (6) is kept connected with the shutter frame (4).

2. The high temperature high pressure double plate gate valve of claim 1, wherein: valve base (2) on flashboard (3) both sides pass through welding and valve body (1) fixed integrative valve body subassembly that forms, two flashboard (3) are connected as an organic wholely through flashboard frame (4), are equipped with spring (5) in the middle of two flashboard (3), valve body (1) of valve body subassembly on be equipped with the guide bar, flashboard frame (4) of flashboard subassembly on be equipped with the guide way, the flashboard subassembly be in through the cooperation of guide way and guide bar valve body subassembly in the activity from top to bottom.

3. The high temperature high pressure double plate gate valve of claim 1, wherein: valve rod (7) pass through connection pad (11) and install in valve gap (8) of activity from top to bottom, valve gap (8) pass through bolt-up on valve body (1), connection pad (11) install on guide pillar (9) through the screw, guide pillar (9) pass through thread tightening on valve gap (8), valve rod (7) on be equipped with both ends gliding limiting plate (10) on the guide pillar, guide pillar (9) on be equipped with the step, valve rod (7) guide pillar (9) step and connection pad (11) between safe the upper and lower slip.

4. A high temperature, high pressure double plate gate valve as defined in claim 3 wherein: the valve rod (7) and the valve cover (8) are also provided with a supporting and lubricating device, the supporting and lubricating device and the valve body (1) are axially limited by a limiting block and a step, and are connected with the valve cover (8) into a whole by a screw, and are matched with an inner hole of the valve body (1) radially through an outer circle.

5. The high temperature high pressure double plate gate valve of claim 1, wherein: the valve body (1) is formed by forging or casting, and the middle part of the valve body (1) is a bolting joint or a self-sealing joint.

6. The high temperature high pressure double plate gate valve of claim 1, wherein: the bottom of the sealing part of the valve body (1) and the flashboard (3) is provided with an empty slot.