CN201462044U

CN201462044U - Reversing check valve

Info

Publication number: CN201462044U
Application number: CN2009200866935U
Authority: CN
Inventors: 姚伟民
Original assignee: YIMA ENVIRONMENTAL POWER CO Ltd
Current assignee: YIMA ENVIRONMENTAL POWER CO Ltd
Priority date: 2009-06-16
Filing date: 2009-06-16
Publication date: 2010-05-12
Anticipated expiration: 2019-06-16

Abstract

The utility model provides a reversing check valve which can choose the flow direction of a medium and achieve the reversing check of the medium flow. The reversing check valve comprises a main valve body, a demountable valve body, a valve core, a valve rod, a checking ball, a grille, an operating handle and the like; the spherical valve core with a pass-through passage formed inside is mounted in the main valve body; the checking ball and the grille are mounted in the passage; the demountable valve body and the valve core are sealed through an O-ring seal; the valve rod is fixedly mounted on the valve core; and the operating handle is fixedly mounted at the upper end of the valve rod; the valve core can be driven to rotate so long as the operating handle is rotated, so that the flow direction of the medium in a pipeline can be controlled; the checking ball can achieve the reversing check of the utility model; and the grille is used for blocking the checking ball when the medium flows. The reversing check valve can choose the flow direction of the medium in the pipeline according to the need, can simultaneously achieve the reversing check of the medium flow, and can adjust the flow rate of the medium and control the off-on of a valve according to the need, thereby effectively preventing the medium from racing around the pipeline.

Description

The commutation check valve

Technical field

The utility model relates to a kind of valve, especially a kind of select MEDIA FLOW to, regulate rate-of flow and realize the commutation check valve of media flow backward stop.

Background technique

In pipe-line systems such as water supply, fuel feeding, air feed, heating, medium flows to low voltage terminal from the pipeline high voltage terminal under the effect of power source, and after power source disappearance differential pressure reduces, reverse flow may appear in medium.For preventing the reverse flow of medium, valve must can satisfy medium one-way flow and backward stop function in the practical application.In comprising the system of two or more media, as in the heavy oil atomizing air system of power plant, scurry into air system in order to prevent fuel oil, need force fuel oil and air to flow by set direction, not only require medium one-way flow and backward stop this moment, also requirement can be selected the flow direction of medium, can regulate rate-of flow simultaneously.Though existing one-way valve can be realized medium one-way flow and backward stop, can not in use select as required MEDIA FLOW to, can not regulate flow, can not realize the switching manipulation of valve.Though existing ball valve can select as required MEDIA FLOW to, regulate the flow and the switch valve of medium, can not realize the backward stop of media flow.

Summary of the invention

The technical problem that the utility model quasi-solution is determined just provide a kind of can select MEDIA FLOW to and realize the media flow backward stop, can regulate and valve is carried out the commutation check valve of switch control simultaneously to flow.

The utility model commutation check valve comprises main valve body, detachable valve body, spool, valve rod, check ball, grid, operating grip, gland, Sealing and threaded fastener.Main valve body and detachable valve body link together by bolt.Spool is installed in the main valve body, seals with O-ring seal between spool and main valve body and the detachable valve body.Spool is spherical, and through channel is offered in inside, and the big end of passage is packed into for the check ball and taken out end, and its diameter is greater than the check bulb diameter, and is processed with internal thread at port, and the check ball is packed into behind the spool, and grid is installed on the big end of this valve core channel by scyewed joint; The another port of through channel is the passage small end, and its diameter is less than the check bulb diameter.Valve rod is fixedly linked in spool, and gland is sleeved on the valve rod, and scyewed joint is in valve body.Operating grip is installed on the valve rod, and uses nut screwing clamping.Overlap rubber sleeve on the operating grip.

Commutation check valve main valve body and the detachable valve body two ends external pipe that is threaded is about to the utility model commutation check valve and is serially connected with in the pipe-line system.Superiority of the present utility model is to select the flow direction of medium in the pipeline as required, and realize the backward stop of media flow simultaneously, can regulate the flow of medium and the switch of control valve as required, avoid the play of medium in pipeline effectively, be applicable to industries such as electric power, chemical industry, water supply, fuel feeding, air feed, heating.

Description of drawings

Fig. 1 is the plan view of the utility model commutation check valve;

Fig. 2 is the plan view of the utility model commutation check valve;

Fig. 3 is a from left to right flowing state schematic representation of the utility model commutation check valve medium;

Fig. 4 is the utility model commutation check valve medium flowing state schematic representation from right to left.

Embodiment

Below in conjunction with accompanying drawing the utility model is described in further detail:

As shown in Figure 1, commutation check valve valve body is split type valve body, is respectively main valve body 5 and detachable valve body 10, and detachable valve body 10 is connected as a single entity by scyewed joint and main valve body 5.Spool 6 is installed in the main valve body 5, spool 6 is spherical, through channel is offered in inside, the big end a of passage is that check ball 7 is packed into and taken out end, the big end a of passage diameter is greater than check ball 7 diameters, port is processed with internal thread, and check ball 7 is packed into behind the spool 6, and grid 8 is installed on the big end a of these spool 6 passages by scyewed joint.The another port of through channel is passage small end b, and its diameter is less than check ball 7 diameters.O-ring seal 9 is installed between spool 6 and main valve body 5, the detachable valve body 10 to be sealed.Valve rod 11 is fixedly linked in spool 6, and sealing gasket 4 and gland 3 are sleeved on the valve rod 11, and gland 3 is tightened on the valve body 5 by scyewed joint.Operating grip 12 is installed on the valve rod 11, and tightens with nut 1 and spring pad 2.Cover rubber sleeve 13 on the operating grip 12.

The utility model commutation check valve is when assembling, check ball 7 and grid 8 are installed in spool 6 earlier, spool 6 assemblies of in main valve body 5, packing O-ring seal 9 again into and assembling, the detachable valve body 10 that O-ring seal 9 will be housed afterwards equally by Bolt Connection in main valve body 5.The hole that valve rod 11 passes main valve body 5 tops is fixedly installed in spool 6, successively sealing gasket 4 and gland 3 is sleeved on the valve rod 11, and gland 3 is tightened on main valve body 5 by scyewed joint.The operating grip 12 that will overlap rubber sleeve 13 at last is fixed on the upper end of valve rod 11 by nut 1 and spring pad 2.

Fig. 2 is the plan view of the utility model commutation check valve.As shown in the figure, be useful on the arrow c of indication media flow direction on operating grip 12, the sensing of arrow c is consistent with the media flow direction.

In actual applications, when operating grip 12 vertical pipe directions, passage in the spool and pipeline circulation position are isolated, and media flow is two-way ends, and the commutation check valve is closed.Rotating operation handle 12 can be adjusted the flow of medium.Operating grip 12 rotates to both sides from vertical pipe direction position, can select the flow direction of medium.

Figure 3 shows that commutation check valve medium flowing state schematic representation from left to right.Operating grip 12 forwards to and is parallel to duct orientation, and the commutation check valve is opened, and medium is pushed check ball 7 to the big end a of passage grid 8 to the right from passage small end b, and the passage in the spool 6 communicates with pipeline circulation position, and at this moment, medium from left to right flows.During the medium reverse flow, medium promotes check ball 7 and blocks passage small end b left, realizes the media flow backward stop.

When needs change MEDIA FLOW to the time, operating grip 12 is rotated 180 °, this moment the media flow view as shown in Figure 4.Operating grip 12 rotates 180 ° by valve rod 11 with spool 6, and the right side medium is pushed check ball 7 to the big end a of passage grid 8 left from passage small end b, and the passage in the spool 6 communicates with pipeline circulation position, and at this moment, medium flows from right to left.During the medium reverse flow, medium promotes check ball 7 and blocks passage small end b to the right, realizes the media flow backward stop.

Claims

One kind the commutation check valve, comprise main valve body (5), detachable valve body (10), spool (6), valve rod (11), check ball (7), grid (8), operating grip (11), gland (3), sealing gasket (4), O-ring seal (9), nut (1) spring pad (2), it is characterized in that: spool (6) is installed in the described main valve body (5), described spool (6) is spherical, through channel is offered in inside, the big end of the passage of described through channel (a) diameter is greater than check ball (7) diameter, port is processed with internal thread, and grid (8) is installed on the big end of passage (a) by scyewed joint; The another port of through channel is passage small end (b), and its diameter is less than check ball (7) diameter; Described detachable valve body (10) in main valve body (5), is installed O-ring seal (9) between spool (6) and main valve body (5), the detachable valve body (10) by Bolt Connection; Described valve rod (11) is fixedly linked in spool (6), and sealing gasket (4) and gland (3) are sleeved on the valve rod (11), and gland (3) is tightened on the main valve body (5) by scyewed joint; Described operating grip (12) is installed in valve rod (11) upper end, and tightens with nut (1) and spring pad (2).
2. commutation check valve according to claim 1 is characterized in that: the interior through channel of spool (6) is passed through the centre of sphere.
3. commutation check valve according to claim 1 is characterized in that: MEDIA FLOW is arranged to indicating arrow (c) on the described operating grip (12).
4. commutation check valve according to claim 1 is characterized in that: described main valve body (5) and the be connected end machining internal thread of detachable valve body (10) with external pipe.
5. commutation check valve according to claim 1 is characterized in that: the material of described check ball (7) is highstrenghtpiston or rubber.
6. according to the described commutation check valve of arbitrary claim in the claim 1 to 5, it is characterized in that: operating grip (12) is gone up suit rubber sleeve (13).