CN2283168Y

CN2283168Y - Quick opening and closing double cutting-off stop valve

Info

Publication number: CN2283168Y
Application number: CN 96229946
Authority: CN
Inventors: 俞伯兴; 陈联芝
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-05-22
Filing date: 1996-05-22
Publication date: 1998-06-03
Anticipated expiration: 2006-05-22

Abstract

The utility model relates to a double shutoff type stop valve or a diaphragm valve, which can be repaired under pressure. The utility model comprises a valve cover part, a valve body part and two blocking mechanisms which can respectively shut off an inlet flow channel and an outlet flow channel of each blocking mechanism. Each blocking mechanism comprises a valve assembly which is arranged in an inner cavity of an auxiliary valve of the valve body, an assembly of the auxiliary valve cover and an operating assembly. The utility model is characterized in that the assembly of the auxiliary valve comprises a rotary valve plate and a connecting rod which is connected with the middle part of the rotary valve plate. The operating assembly is composed of a drive mechanism and a fixed bracket which are used for driving the connecting rod to do a rectilinear motion so as to make the rotary valve plate generate pivoted motion to shut off or turn on the inlet flow channel and the outlet flow channel. The utility model has the advantages of small dimension of the whole shutoff mechanism, compact structure, flexible operation, small stroke and rapid shutoff and turnon.

Description

Two cutting type stop valves of snap switch

The utility model relates to a kind of stop valve that is used for the pressure pipe road, specifically, but relates to a kind of stop valve that is used for the allowing pressurized maintenance of high-temperature, high pressure fluid pipeline.

But by stop valve the applicant invention, that be applicable to allowing pressurized maintenance in the pressure piping, for example, No. the 95243707.4th, Chinese utility model patent and disclosed a kind of single stop valves that cut off pattern and two cut-out patterns for 95244769.X number respectively.Wherein, the blocking-up mechanism of two cutting types is because the structure that has adopted blockage body and bott stick by wedge flashboard form to be connected, and its transverse dimension obviously reduces than single cutting type.But it still will be handled the directly horizontal linear reciprocating motion of described blocking-up mechanism's work by operating mechanism and realize its blocking effect, if as large-scale, as be used for the heavy caliber stop valve of petrochemical industry industry, because the Flow diameter size is big thereby paddle sizes that match with it is also bigger, and its operational stroke is also bigger, therefore the transverse dimension of valve body and the distance that bott stick stretches out valve body are all wanted corresponding increase, thereby the time of cutting off or closing runner is just longer.Obviously, the stop valve with blocking-up mechanism of said structure pattern can not finely be applicable to the application that pipeline space is limited and need dam fast.

Therefore, to provide a kind of transverse dimension little and can realize two cutting type stop valves of snap switch for the purpose of this utility model.

For achieving the above object, the two cutting type stop valves of the utility model comprise: one has the valve gap part of spool; The one valve body part that removably links with described valve gap part, described valve body is formed with: being in the same center line relative enter runner and discharges runner and the secondary valve insertion of ditch cavity and the in-plane extension that is communicated with described turnover runner respectively, edge and described center line are perpendicular; On described ditch cavity wall with the spool coaxial line be embedded with a seal ring, described spool is matched so that described two runner connected sums are closed with described seal ring by an operating device, each described secondary valve insertion is along being embedded with the relative at interval stuffing box gland of coaxial line on the relative two side of described center line respectively; Be used for cutting off respectively the two blocking-up mechanisms that entering runner and discharging runner, each is blocked mechanism and comprises respectively: be arranged on secondary valve assembly in the described secondary valve insertion, with described valve body removably link pay the valve gap assembly and be installed in described secondary valve gap assembly on the manipulation assembly of the manipulation cut-out runner that is connected with described secondary valve assembly; Its characteristic point is, described secondary valve assembly comprises: one is positioned at the rotary valve plate on the described secondary valve insertion bearing of trend, and it is made up of with the intermediate portion branch that is connected described two ends with the switch terminals that can closely with the opposite end of described stuffing box gland join a relative hinged support end; With a valve plate connecting rod, it is made up of a valve plate connecting head that is connected with described rotary valve plate intermediate portion and a body of rod that laterally stretches out described secondary valve gap assembly; Described manipulation assembly comprises a driving mechanism that is connected with described body of rod external part in order to drive valve plate connecting rod moving linearly, so that the switch terminals of described rotary valve plate pivots to realize that close between described switch terminals and stuffing box gland opposing end surface join and separate around described hinged support end.

Adopt the utility model has the advantages that of such scheme: after the secondary valve assembly of described shutdown mechanism adopts rotary valve plate and structure that connecting rod is connected, because the straight line motion that is converted into described connecting rod that rotatablely moves of operating mechanism pivots around its supported end to drive the rotary valve plate, so that thereby its switch terminals combines the cut-out that realizes runner with the opposing end surface of stuffing box gland, therefore compare with the flashboard type shutdown mechanism of prior art, operational stroke not only of the present utility model reduces greatly, reduces with structure more compact thereby the overall dimensions of while shutdown mechanism greatly reduces the size that makes whole valve; In addition, because the stroke that pivots is little, cut-off velocity improves greatly, thereby can satisfy in the pipeline that the heavy caliber valve is placed in the confined space and the requirement of fast shut-off runner.

Now specify the purpose of this utility model and structural feature by a preferred embodiment and in conjunction with its accompanying drawing.

Fig. 1 is an embodiment's of the present utility model plan view through partly dissecing;

Fig. 2 is Fig. 1 embodiment's the plan view through partly dissecing;

Fig. 3 is the sectional view of being got along A-A line among Fig. 2;

Fig. 4 is the phantom of being got along C-C line among Fig. 3;

Fig. 5 is the plan view of Fig. 1 embodiment's valve plate connecting rod, and valve plate connecting head wherein illustrates through dissecing;

Fig. 6 is the plan view of the valve plate connecting head of Fig. 5.

As illustrated in fig. 1 and 2, a preferred embodiment of the present utility model comprises: one is equipped with the valve gap part 6 of spool 7 in it, the one valve body part 13 that removably is connected with described valve gap part, wherein, valve body 13 be formed be in the same center line relative enter runner 32 and discharge runner 33 and ditch cavity 34 and respectively with enter runner and discharge that runner is connected and along with the secondary valve insertion 35 of the perpendicular in-plane extension of described center line, on described communication cavity wall with 7 one-tenth coaxial lines of spool be embedded with a seal ring 9, as described in can making as handwheel 36 by an operating device spool 7 with as described in seal ring 9 match so that as described in two runner connected sums close; Each described secondary valve insertion 35 is along being embedded with the relative interior outer seal sleeve of

axis

10,12 respectively on the relative two side of described center line, wherein the interior edge face of outer seal sleeve 12 (relative with the outside end face of inner seal sleeve 10) is a cammed surface; Also comprise being respectively applied for and cut off the blocking-up mechanism enter runner and to discharge runner, manipulation assembly that be connected with described secondary valve assembly, that the cut-out runner is used on it includes and is arranged on pair valve gap assembly of paying valve assembly, being connected removably with described valve body 13 in the described secondary valve insertion 35 and is installed in described secondary valve gap assembly.Wherein said secondary valve assembly comprises that one is positioned at the rotary valve plate 11 on the described secondary valve insertion bearing of trend, it is by a relative hinged support end 38, one switch terminals 39 be connected described two ends 38,39 intermediate portion 40 is formed, the bi-side of described switch terminals 39 respectively with interior

outer seal sleeve

10,12 corresponding end-faces is close joins, the outer side surface of switch terminals is cammed surface (as shown in Figure 1), other close form of joining also can be arranged certainly, for example within the outside end face of inner seal sleeve 10 and the mutually close switch terminals of joining 39 with it the side be arranged to cammed surface or interior outer seal sleeve opposing end surface and mutually close switch terminals of joining in, outer side surface all is arranged to cammed surface; With a valve plate connecting rod 19, it comprises a valve plate connecting head that is connected with described valve plate intermediate portion 40 41 and crosses out a body of rod 42 of described secondary valve gap assembly (being illustrated below the concrete structure).Described secondary valve gap assembly comprises a secondary valve gap 23 that is connected with described valve body 13 detachable (as passing through bolt), this pair valve gap extends a boss 43 (as shown in Figure 3) with annular wall at it from outer side surface and connecting rod 19 coaxial line ground with respect to inner chamber 35, ring wall outer wall at described boss forms screw thread, and its inwall and form a step-shaped hole of forming by aperture and macropore, the described body of rod 42 stretch out described step-shaped hole and with the aperture Spielpassung; Be located at packing element 25 between the described body of rod and the ring wall and gland 26 and one and the outer wall bolt of described boss be used to compress the nut part 27 of described filler and gland.Described manipulation assembly comprises: one is connected with the external part 44 of the body of rod 42 of described valve plate connecting rod 19 with the straight-line driving mechanism of drive valve plate connecting rod (below specify), with so that the switch terminals 39 of rotary valve plate 11 pivot with close joining (blocking) of realizing switch terminals 39 and inside and outside stuffing box gland opposing end surface and separate (connection) around its hinged support end 38 by a pivot structure; With the support 28 of a fixing described driving mechanism, described support is connected to constitute an inner chamber 45 with described secondary valve gap 23; Described in the present embodiment external part 44 is a thread section, described driving mechanism comprises that one has the axle sleeve 30 of interior threaded hole 46, it have stretch into that the externally threaded inner end 47 of having of inner chamber and stretches out the outer outer end 48 of the end wall of described support and on the outer end formed annular flange flange 30 ', described flange abuts against on the described end wall, described body of rod threaded exterior end 44 and described inner bolt hole 46 bolts, one screw thread and cap 29 and described inner end outside thread be the spiral shell knot mutually, the end of described inner end is provided with annular groove, one circlip for shaft 32 is embedded in this annular groove, preventing and cap gets loose, thus with described flange 30 ' match so that axle sleeve is axially located; With a handle 31 of fixedlying connected with described outer end.Described pivot structure is included in one the 3rd pin-and-hole 49 that forms on the described hinged support end 38 of rotary valve plate in the present embodiment and passes through one second pin 18 of a fixed structure with respect to described secondary valve insertion two lateral walls 49 and 50 vertical fixing, described fixed structure comprises the bearing hole that is located on the sidewall 50 at least and fixes a pin end 51 of described second pin 18, in the present embodiment as shown in Figure 4, also has a cover plate 16, be embedded and removably be connected on this sidewall on the sidewall 49 and by screw 15, described cover plate is spirally connected fixing by screw (not shown) and another pin end 52.

Then specify the structure that the connecting head 41 of rotary valve plate intermediate portion 40 and connecting rod 19 is connected.As shown in Figure 3, described rotary valve plate intermediate portion 40 is provided with first pin-and-hole 53 of an oval shape, described valve plate connecting head 41 as illustrated in Figures 5 and 6, it with the corresponding plane of described rotary valve plate pivot plane on form one with the notch 54 of rotary valve plate intermediate portion gap scarf, have two

parallel side

55 and 56

relative cell wall

57 and 58; On the perpendicular axial direction in each cell wall upper edge, be formed with the second relative pin-and-

hole

59,60; On nearly each pin-and-hole end, form

annular groove

61,62; One first straight pin 20 passes through first and second pin-and-holes, and gives the axial restraint (see figure 3) by the circlip 21 that is embedded in described annular groove.

Operating process of the present utility model is as follows: operating grip 31 rotates axle sleeve 30 in the matching hole of support end wall, because axle sleeve is that axially locating is on end wall, therefore the internal thread by axle sleeve can make the thread section 44 of valve plate connecting rod make horizontal straight line motion, thereby make whole connecting rod produce horizontal displacement, thereby its switch terminals 39 is rotated around its supported end 38; Because the side of described switch terminals and stuffing box gland end face wedge are mutually joined, and therefore can realize entering the cut-out and the circulation of runner and discharge runner by the pivot movement of described rotary valve plate.

Claims

1. two cutting type stop valves of a snap switch, it comprises: one is equipped with the valve gap part (6) of spool (7) in it; The one valve body part (13) that removably links with described valve gap part, described valve body be formed be in the same center line relative enter runner (32) and discharge runner (33) and ditch cavity (34) and respectively with described enter runner and discharge that runner is connected and along with the secondary valve insertion (35) of the perpendicular in-plane extension of described center line, on described communication cavity wall with spool (7) coaxial line be embedded with a seal ring (9), by an operating device (36) described spool (7) is matched so that described two runner connected sums are closed with described seal ring (9), each described secondary valve insertion (35) is along being embedded with the relative at interval stuffing box gland (10,12) of coaxial line on the relative two side of described center line respectively; Be used for cutting off respectively the two blocking-up mechanisms that entering runner and discharging runner, each is blocked mechanism and comprises respectively: the secondary valve gap assembly that be arranged on secondary valve assembly in the described secondary valve insertion (35), removably links with described valve body be installed in described secondary valve gap assembly on manipulation assembly that be connected with described secondary valve assembly, that the cut-out runner is used; It is characterized in that:

Described secondary valve assembly comprises: one is positioned at the rotary valve plate (11) on the described secondary valve insertion bearing of trend, it can be made up of with the intermediate portion that is connected described two ends (38,39) (40) with the close switch terminals of joining of the opposing end surface of described stuffing box gland (39) a relative hinged support end (38); With a valve plate connecting rod (19), it is made up of a valve plate connecting head (41) that is connected with described rotary valve plate intermediate portion (40) and the body of rod (42) that crosses out described secondary valve gap assembly;

Described manipulation assembly comprises that one is connected with the straight-line driving mechanism of drive valve plate connecting rod with the body of rod (42) external part of described valve plate connecting rod (19), so that the switch terminals (39) of described rotary valve plate (11) pivots to realize that close between described switch terminals (39) and stuffing box gland opposing end surface join and separate around described hinged support end (38) by a pivot structure; With the support (28) of a fixing described driving mechanism, this support (28) is connected with the secondary valve gap (23) of described secondary valve gap assembly and constitutes an inner chamber (45).

2. as claimed in claim 1 pair of cutting type stop valve is characterized in that, cammed surface is arranged in one of bi-side of the opposing end surface of described at least stuffing box gland (10) and the rotary valve switching plate end (39) that matches with it.

3. as claimed in claim 1 pair of cutting type stop valve is characterized in that described rotary valve plate (11) intermediate portion (40) is provided with first pin-and-hole of an oval shape; Be formed with on described valve plate connecting head (41) and the corresponding plane of described rotary valve plate pivot plane one with the notch (54) of described rotary valve plate intermediate portion (40) gap scarf and relative two cell walls (57,58) with two parallel side (55,56); Be formed with relative second pin-and-hole (59,60) on the perpendicular axial direction in described cell wall upper edge, one first straight pin (20) is fixed on described two cell walls by described first and second pin-and-holes and by an axial restraint structure.

4. as claimed in claim 3 pair of cutting type stop valve, it is characterized in that, the fixed structure of described first straight pin (20) comprises and is located at a pair of annular groove (61,62) on described second pin-and-hole (59,60) the two relative outer ends and is embedded circlip (21) in described annular groove.

5. as claimed in claim 1 pair of cutting type stop valve, it is characterized in that described pivot structure is included in last one the 3rd pin-and-hole (49) and that forms of described hinged support end (38) and passes described the 3rd pin-and-hole (49) with gap and pass through second pin (18) of a fixed structure with respect to the two lateral walls vertical fixing of described secondary valve insertion.

6. as claimed in claim 5 pair of cutting type stop valve is characterized in that, described fixed structure comprises the bearing hole that is located on the sidewall at least and is fixed on a pin end (51) of described second pin (18) in the described bearing hole.

7. as claimed in claim 6 pair of cutting type stop valve, it is characterized in that, described fixed structure comprises also and being embedded and the cover plate (16) that is spirally connected that described cover plate (16) is spirally connected fixing with another pin end (52) of described second pin (18) on another relative sidewall of described bearing hole sidewall and with described another sidewall.

8. as claimed in claim 1 pair of cutting type stop valve, it is characterized in that described secondary valve gap assembly comprises one with the detachable secondary valve gap (23) that is connected of described valve body (13) with the packing element (25) that passed by the described body of rod (42) on it, gland (26) are set and are spirally connected with described secondary valve gap (23) and be used to compress the nut part (27) of described filler (25) and gland (26).

9. as claimed in claim 1 pair of cutting type stop valve, it is characterized in that, the described body of rod (42) external part forms external thread section, described driving mechanism comprises an internal thread axle sleeve (30), its axially locating also is rotatably mounted on the end wall of described support (28), and has the inner end (47) and that stretches into described inner chamber (45) and stretch out the outer outer end (48) of described end wall; With a handle (31) of fixedlying connected with described outer end (48).