CN202867953U

CN202867953U - Combined valve of sluice valve and check valve

Info

Publication number: CN202867953U
Application number: CN 201220594760
Authority: CN
Inventors: 戴学祥; 王燊
Original assignee: Zhejiang Zhenghua Valve Factory
Current assignee: Zhejiang Zhenghua Valve Factory
Priority date: 2012-11-01
Filing date: 2012-11-01
Publication date: 2013-04-10
Anticipated expiration: 2022-11-01

Abstract

At least three guide ribs are arranged on the inner wall of a fluid flow passage which is arranged on one side of a valve body, and an end socket of a rib plate is connected with a clapboard. An outer circle of a check valve socket ring is tightly connected with an inner circle of the valve body, an A space of the fluid flow passage of the valve body is larger than a B space of the fluid flow passage of the valve body, the inner diameter of the A space is equal to the inner diameter of the valve minuses the outer diameter of a close body of the check valve, and the inner diameter of the A space is larger than or equal to the area of the B space. A big end outer circle of the close body of the check valve contacts the inner circle of the rib plate, and a small end outer circle movably matches with a hole of the clapboard.

Description

The combined valve of gate valve and safety check

Technical field

The invention belongs to valve, relate in particular to the combined valve of gate valve and safety check.

Background technique

Gate valve is being well-known in the art, gate valve refers to the valve that closure member (flashboard) moves along the Vertical direction of path central line, cut off or connect flowing medium at various commercial plants such as petrochemical industries, usually the general bore DN 〉=50mm of such valve, pressure is generally 1.6～4MPa or higher, temperature is generally 120 ℃～480 ℃, be suitable for not needing usually to open and close, and the operating mode of maintenance flashboard standard-sized sheet or full cut-off, be the valve kind of use amount maximum on all industrial field tube equipments.

Safety check also is for example various pipelines described above, it is a kind of valve in the valve classification, to stop the backflow of liquid, if liquid is taken the position to one, move to enable possition by the medium that flows along flow direction from its closed position at this flap, do not producing when refluxing, flap relies on opposite being pressed on the valve seat and being maintained in its closed position of the hydrodynamic pressure of valve own, is to belong to automatic open and close valve from function.

Known safety check is that to belong to be independent being installed on the necessary pipeline position, and structure relative complex, price are also somewhat expensive.

Summary of the invention

The present invention is desirable to provide the combined valve of a kind of gate valve and safety check, its objective is to realize that a kind of can and being conducive to its simple structure combine two kinds of valves and mutually trouble-free operation with very low manufacturing expense.

At least be provided with three guiding ribs on the inwall in housing one side liquid passage, the termination of gusset and dividing plate form and link, one safety check seat ring, the cylindrical of seat ring and the inner circle of valve body are connected airtight, the combined valve of described a kind of gate valve and safety check is characterised in that, the closure body of safety check is installed at described gusset and dividing plate.

The A space of the runner of valve body is greater than the B space of valve flowing channel, in the described A space=and the external diameter of valve block internal diameter-closure of check ring body 〉=B spatial area.

The large end cylindrical of the closure body of described safety check and contacting of gusset inner circle, the hole in small end cylindrical and the dividing plate is movable to be cooperated.

Beneficial effect

The combination of gate valve and safety check link together be particularly advantageous be design and make relatively easy and can realize low cost and solve with the method for saving most and simple structure existing the task that two valves just can be finished being installed separately.

Description of drawings

The attainable effect of the present invention is further described by following accompanying drawing.

Fig. 1 is the sectional view of the combined valve of gate valve and safety check.

Fig. 2 is the sectional view of the combined valve valve body of gate valve and safety check.

Fig. 3 is the sectional view of valve body I-I safety check dividing plate shown in Figure 2.

Fig. 4 is the sectional view of the combined valve closure member of Fig. 1 gate valve and safety check.

Fig. 5 is the sectional view of the combined valve seat ring of Fig. 1 gate valve and safety check.

Fig. 6 is the sectional view of commercially available gate valve.

Fig. 7 is the sectional view of commercially available safety check.

Embodiment

Fig. 1, the combination brake switch and proporting of gate valve shown in Fig. 2 and safety check, comprise valve chest 10 dimerous, this housing 10 has the first housing parts 11 and the second housing parts 14 and comprises runner hole 16 and runner hole 20,

common runner hole

16,20 are equal to the internal diameter of the pipeline that is connected mutually for valve, wherein the second housing 14 parts constitute the form of pipeline equally, be transitioned into attachment portion 15 from housing 14 middle parts to a side, its internal diameter 19 is equivalent to runner 16 outside the maximum area of removing closure of

check ring body

12,20 area, and with near minimum diameter 15 prescription of vertical flange inner side surface 17 to termination.

The inner wall even distribution of the second housing parts 14 has guiding rib 18, extends from the middle part of this part to flange 17 ends, and guiding rib 18 is according to the setting of combination brake switch and proporting size but should have at least more than three, with the closure body 21 large end cylindricals 12 that guarantee safety check comparatively stable coaxality arranged at the volley.

In the second housing parts 14, the end face that guiding rib 18 stretches out to housing 14 middle parts meets at right angles and vertically is connected in gusset 26, while and support ring 22 are connected to become an overall structure, support ring 22 one sides form an axle collar 23 that axially protrudes laterally, and the hole 24 of stretching out certain-length is conducive to carrying and the location of the axle 20 of non-return flap 21.

Internal thread 28 is processed at the second housing parts 14 runner mouths 16 places, and the planar ends 29 that stops with the formation one that is parallel to flanged surface 17 location, fits in screw pair with the outside thread 31 of the seat ring 13 of safety check.

In case if when not wishing aborning in the pipeline that medium flows backwards, the hydrodynamic pressure of one side-entrance 20 of valve namely can → direction promotes seat ring 13 places of safety check open-shut device 21 on the valve outfall 16, wherein the sealing surface 32 on the closure member 21 contacts and forms sealing state with sealing surface 30 on the seat ring 13.

Claims

1. the combined valve of a gate valve and safety check, at least be provided with the tibet cinnamon bark plate on the inwall in housing one side liquid passage, the termination of gusset and dividing plate form and link, one safety check seat ring, the cylindrical of seat ring and the inner circle of housing are connected airtight, the combined valve of described a kind of gate valve and safety check is characterised in that, the closure body of safety check is installed at described gusset and dividing plate.

2. the combined valve of a kind of gate valve according to claim 1 and safety check is characterized in that, the A space of the runner of housing is greater than the B space of valve flowing channel, in the described A space=and the closure body external diameter of housing internal diameter-safety check 〉=B spatial area.

3. the combined valve of a kind of gate valve according to claim 1 and safety check is characterized in that, the large end cylindrical of the closure body of described safety check contacts with the gusset inner circle, and the hole in small end cylindrical and the dividing plate is movable to be cooperated.