CN201412523Y

CN201412523Y - Overflow valve

Info

Publication number: CN201412523Y
Application number: CN200920076754XU
Authority: CN
Inventors: 陈勇
Original assignee: Shanghai Baosteel Chemical Co Ltd
Current assignee: Shanghai Baosteel Chemical Co Ltd
Priority date: 2009-06-22
Filing date: 2009-06-22
Publication date: 2010-02-24
Anticipated expiration: 2019-06-22

Abstract

The utility model discloses an overflow valve, comprising a valve base, wherein the valve base forms a valve chest, a flow passage on the bottom of the valve chest is provided with a valve seat, on the corresponding position of the valve seat, the two ends of a valve rod connected with a valve plug are respectively arranged on the inner side and the outer side of the valve chest, the valve plug isarranged on the inside end of the valve chest, the valve chest is provided with a valve cover, and the valve cover is provided with a shunting hole. With the design of the valve cover, the valve chest and the valve cover can be separated, so the repair of the valve seat and the valve plug in the valve chest can become possible and easy.

Description

Restrictor Valves

Technical field

The utility model relates to the Restrictor Valves of a kind of controlling liquid flow and flow velocity, be mainly used in petrochemical industry, coking industry, be particularly useful for the storage tank station, pressurized container of liquids such as liquefied petroleum gas (LPG), liquefied ammonia, liquid oxygen, liquid nitrogen, liquid chlorine etc., also be applicable in the liquid phase systems of other poisonous and harmful, Korrosionsmedium simultaneously.

Background technique

Restrictor Valves belongs to a kind of special quick protection valves such as pressurized container, spherical tank, a kind of specific safety annex that also can be regarded as pressurized container, NBS does not relate to this respect at present, and Restrictor Valves is not had the forced examination regulation, and therefore present Restrictor Valves design has certain randomness.

The patent No. is that 9880383860.9 Chinese patent discloses a kind of adjustable safety filtering valve of setting by flow velocity, the Restrictor Valves of this structure, because fed sheet of a media leaks along adjusting place easily, therefore be not suitable for the high-pressure liquid ammonia spherical tank that danger is high, permeability is very strong.

Shown in attached Fig. 1 and 2, also have a kind of U.S. to produce Restrictor Valves now on the market, this Restrictor Valves comprises that valve body 11 and front end are provided with the valve rod 12 of spool 121, be provided with the valve seat 111 that profile and awl cylindrical valve spool 121 adapt in the relevant position of the positioning pedestal 13 of valve body 11 upper ends, keying by 111 of regulating spool 121 and valve seats concerns that the unlatching that realizes whole Restrictor Valves is with closed, outside valve rod 12, be arranged with spring 124, one end of spring 124 is realized spacing by jump ring 122 and retaining ring 123, the other end of spring 124 is spacing by 131 of guide sleeves, and spool 121 is embedded in the chamber that is surrounded by guide sleeve 131 and positioning pedestal 13, be in the interior spool 121 of chamber over against the valve seat position, guide sleeve 131, positioning pedestal 13 and valve body 11 are welded as a whole, and be non-dismountable; Offer discharge orifice on the positioning pedestal inwall on the chamber top that is surrounded, arrow points as shown in Figure 1 is the flow direction signal that medium passes through discharge orifice, chamber, valve seat.

Because it is fixed that this U.S. produces the Restrictor Valves structure, limited flow rate is unadjustable, and guide sleeve is a welding type, and spool can not take out; So after use after a while, corrosion in various degree can appear in sealing surface, spool can not reliably be closed, thereby has potential safety hazard; In the future in case inefficacy will bring enormous economic loss to the enterprise that uses.

The model utility content

Technical problem to be solved in the utility model is to provide a kind of easy-to-dismount Restrictor Valves, and it makes Restrictor Valves spool and valve seat because the reparation after use wearing and tearing and the corrosion becomes more simple, has also reduced maintenance cost when avoiding potential safety hazard.

Another technical problem to be solved in the utility model is to provide a kind of flow velocity and the adjustable Restrictor Valves of flow, helps the flow through liquid flow properties of Restrictor Valves of better controlled.

In order to solve above technical problem, the utility model is taked following technological scheme.

A kind of Restrictor Valves, comprise a valve body pedestal, described valve body pedestal forms a valve pocket, the liquid chunnel of valve pocket bottom is provided with valve seat, corresponding with the position of valve seat, be connected with the inside and outside both sides of office, valve rod two ends valve pocket of spool, described spool is in the valve pocket medial extremity, described valve pocket has a valve gap, offers tap hole on the described valve gap.The introducing of valve gap notion has realized the detachable of valve pocket and valve gap, so to the reparation that is in valve seat in the valve pocket and spool become may and easier finishing; Be disc when this valve gap profile simultaneously, and adopt when being threaded, when guaranteeing switching performance, also help dismounting with valve pocket.

As the further improvement of the technical program, can have the above tap hole on the described valve gap, a described above tap hole is that the center is evenly distributed with the valve rod.Offering with evenly distributed of a plurality of tap holes helps the liquid Restrictor Valves of reasonably introducing and flow through.

Also as the further improvement of the technical program, in described valve pocket, described valve gap extends to form slant leading surface naturally around valve rod, and described guide face will evenly be discharged along liquid chunnel around will evenly guiding valve seat into along the liquid that tap hole enters valve pocket inside.

When being processed with one section, the end outside the valve rod valve pocket regulates screw thread, and when on this section adjusting screw thread, being respectively equipped with adjusting nut and lock nut from inside to outside, the both ends of the spring that is set on the valve rod outer rim can lean with spool (or valve gap) and adjusting nut respectively, by the position of regulating and controlling nut on valve rod, and then influence the tensioning situation of spring, realization is to the adjusting of spool and valve base chamber gap length, to solve the control to fluid flow and flow velocity.

And, when having one, described valve body pedestal connects boss, and when described connection boss periphery was processed into outside thread, the cooperation realization by this outside thread and the pipeline internal thread that is connected this Restrictor Valves was with the installation of this Restrictor Valves and pipeline.Can certainly be by to connecting the processing of boss upper and lower surface, forming a flange arrangement, thereby realize connection with pipeline by means of flange arrangement.

Description of drawings

Below in conjunction with accompanying drawing embodiment of the present utility model being done one describes in detail.

Fig. 1 is the structural representation of certain product opening state in the prior art;

Fig. 2 is a product closed condition schematic representation among Fig. 1;

Fig. 3 is the structural representation of the utility model opening state;

Fig. 4 is the structural representation of valve rod and spool among Fig. 3;

Fig. 5 is the structural representation of guide sleeve and thrust plate among Fig. 3;

Fig. 6 is the plan view of Fig. 5.

---valve body 111---valve seat 12---valve rod among the figure: 11

121---spool 122---jump ring 123---retaining rings

124---spring 13---positioning pedestal 131---guide sleeves

21---pedestal 211---valve seat 212---liquid chunnels

213---boss 214---periphery 22---valve rods

221---spool 222---adjusting nut 223---lock nuts

224---spring 225---adjusting screw thread 231---guide sleeves

2311---guide face 24---valve pocket 25---valve gap/thrust plates

251---tap hole 252---outside thread 253---attachment holes

Embodiment

Restrictor Valves as shown in Figure 3, valve body pedestal 21 lower ends are provided with and connect boss 213, connect boss 213 and are used for this Restrictor Valves is installed on the pipeline of pressurized container, and the Placement of itself and pipeline can be selected following several Placement for use:

1., wafer type connects; Be that the pipeline upper flange is connected connection boss 213 upper and lower surfaces of clamping Restrictor Valves with lower flange;

2., be threaded; Outside thread is processed at periphery 214 places that are about to Restrictor Valves connection boss 213, utilizes this outside thread to be connected with the pipeline internal thread then;

3., flange connects; Flange is processed at the upper and lower surface place that is about to Restrictor Valves connection boss 213, directly is connected with pipeline.

Extremely shown in Figure 6 as Fig. 3, valve body pedestal 21 lower ends are provided with the liquid chunnel 212 of carrying liquid, be provided with valve seat 211 at channel edge, surround the valve pocket 24 of a flow of liquid warp at valve seat 211 upper end valve body pedestals 21, these valve pocket 24 upper inside wall offer female thread structure, the outside thread of the circular thrust plate 25 of lid shape just in time can be tightened with the screw-internal thread fit of valve pocket, 25 central authorities are provided with through hole attachment hole 253 at thrust plate, column valve rod 22 passes this attachment hole, and an end that connects spool 221 is embedded in valve pocket 24 inside, along the drop-down valve rod 22 that send on the attachment hole 253, form the Restrictor Valves structure of a piston-like, just in time make the spool 221 of lower end realize cooperating and separating, thereby the flow velocity and the flow size of the liquid stream of liquid chunnel 212 are flowed out in control through valve pocket 24 with valve seat 211; Because the Restrictor Valves that is seated in the pipeline belongs to the necessary channel that flow of liquid is crossed, so on thrust plate 25, evenly be provided with the tap hole 251 of six circles, the liquid of flowing through is through the shunting of tap hole 251, evenly enter valve pocket 24, and also be provided with a guide sleeve 231 at

spool

221 and 25 of thrust plates, the guide sleeve 231 of inverted cone forms the guide face 2311 on a similar umbrella surface, and this guide face 2311 continues to control the flow of fluid that enters in the valve pocket 24.

Simultaneously an end that exposes valve pocket at valve rod 22 is processed with one section and regulates screw thread 225 (outside thread), and by the adjusting nut 222 that cooperates with this outside thread and the control of lock nut 223, being set in valve rod spring 224 outward can be all the time for pressured state; Can pass through adjustment or the change within the specific limits of adjusting nut position, the flow control of Restrictor Valves is reset to former design load or actual desirable value, realize the can regulate of flow.

And when spool 221 or valve seat 211 wearing and tearing or corrosion occur and when influence sealing effect and flow control, can screw off thrust plate 25 and guide sleeve 231 earlier, taking-up spool 221 grinds reparation to spool 221, sealing surface of seat.The Restrictor Valves of this structure is particularly suitable for the high-pressure liquid ammonia spherical tank that danger is high, permeability is very strong.

Normal flow≤the 1.5m/s of general liquid generally can reach 2-3m/s and set flow velocity by this Restrictor Valves, and concrete numerical value determines by the user, can be by selecting suitable spring for use, and adjust within the specific limits by the position that changes adjusting nut 222.

Existing fixed formula Restrictor Valves, guide sleeve is a welding type, limited flow rate is unadjustable, after Restrictor Valves uses a period of time, owing to reasons such as the burn into spring force weaken, makes inflow-rate of water turbine be offset, and can't adjust, and can only change new product.Removable, the adjustable Restrictor Valves that the utility model provides both can be used as flow-limiting valve and has come pipeline flow is carried out metering function; Can be used as Emergeny Cutoff Valves again and cut off medium automatically apace.Have the adjustable and spool of inflow-rate of water turbine, valve seat can be taken apart, check easily, the advantage of maintenance.The inflow-rate of water turbine of Restrictor Valves can be adjusted within the specific limits by changing the adjusting nut position, and is very easy to use, not only reduced potential safety hazard but also reduced user cost.

Claims

1, a kind of Restrictor Valves, comprise a valve body pedestal (21), described valve body pedestal (21) forms a valve pocket (24), the liquid chunnel (212) of valve pocket (24) bottom is provided with valve seat (211), corresponding with the position of valve seat (211), be connected with the inside and outside both sides of valve rod (22) office, two ends valve pocket (24) of spool (221), described spool (221) is in valve pocket (24) medial extremity, it is characterized in that, described valve pocket (24) has a valve gap (25), offers tap hole (251) on the described valve gap (25).

2, Restrictor Valves according to claim 1 is characterized in that, described valve gap (25) is a disc, and this disc valve gap (25) is threaded with described valve pocket (24).

3, Restrictor Valves according to claim 1 is characterized in that, has the above tap hole (251) on the described valve gap (25), and a described above tap hole (251) is that the center is evenly distributed with valve rod (22).

4, according to claim 1,2 or 3 described Restrictor Valvess, it is characterized in that, in described valve pocket (24), described valve gap (25) extends to form slant leading surface (2311) all around naturally along valve rod (22), and described guide face (2311) will enter the inner liquid of valve pocket (24) along tap hole (251) and evenly guide valve seat (211) into and locate liquid chunnel (212).

5, according to claim 1,2 or 3 described Restrictor Valvess, it is characterized in that, the outer end of described valve rod (22) valve pocket is processed with one section and regulates screw thread (225), on this section adjusting screw thread (225), be respectively equipped with adjusting nut (222) and lock nut (223) from inside to outside, spring (224) two ends that are set on valve rod (22) outer rim lean with spool (221) and adjusting nut (222) respectively, and perhaps spring (224) two ends lean with valve gap (25) and adjusting nut (222) respectively.

6, Restrictor Valves according to claim 1, it is characterized in that, described valve body pedestal (21) has one and connects boss (213), and described connection boss (213) periphery (214) is processed with outside thread, and described outside thread adapts with the pipeline internal thread that is connected this Restrictor Valves.

7, Restrictor Valves according to claim 1 is characterized in that, described valve body pedestal (21) has one and connects boss (213), and the upper and lower surface of described connection boss (213) forms a flange arrangement.