CN212055975U

CN212055975U - Four-way valve

Info

Publication number: CN212055975U
Application number: CN202020322667.4U
Authority: CN
Inventors: 梁连金; 符明海
Original assignee: Shk Valve Group Co ltd; Shanghai Special Equipment Supervision and Inspection Technology Institute
Current assignee: Shk Valve Group Co ltd; Shanghai Special Equipment Supervision and Inspection Technology Institute
Priority date: 2020-03-16
Filing date: 2020-03-16
Publication date: 2020-12-01
Anticipated expiration: 2030-03-16

Abstract

The utility model provides a four-way valve, which comprises a group welding pipe seat, three group welding valve bodies and three valve rods which are fixed together; the assembly welding pipe seat comprises an inlet pipe, and one end of the inlet pipe is communicated with three branch pipes; the assembly welding valve body comprises an elbow, outlet pipes and a valve rod barrel, the elbow is communicated with the branch pipes, the outlet pipes are communicated with the elbow, the three outlet pipes are parallel to the inlet pipe, and the valve rod barrel is connected to the connecting position of the elbow and the outlet pipes; the top of return bend is equipped with the valve clack, the valve rod is followed the valve rod section of thick bamboo stretches into in the valve clack, in the valve clack the cover is equipped with to the ring on the valve rod, the valve clack below the cover is equipped with the guide holder on the valve rod, the guide holder passes through the bolt fastening and is in on the valve clack, the bottom of valve rod is connected with actuating mechanism. The utility model discloses can satisfy the product differentiation and to the requirement of vacuum operating mode, can realize not having for a long time and leak.

Description

Four-way valve

Technical Field

The utility model belongs to the technical field of the valve, concretely relates to cross valve.

Background

A multi-channel valve is a valve that controls the direction of flow and can shut off, turn on, and switch flow between three or more alternate flow channels. The multi-channel valve integrates a plurality of valves, a valve body is commonly shared, a plurality of control mechanisms with independent channels control fluid, the pipeline design is simplified, and the pipeline construction and maintenance cost is reduced.

For example, in the industrial production process of polyester, the precondensate generated by the reaction of the precondensation section is discharged by a three-way valve, pressurized by a prepolymer discharge pump, collected by a high-pressure melt three-way valve, filtered by a melt filter to remove coagulated particles or impurities and the like, and conveyed to a final polycondensation reactor. With the demand for large-scale polyester production equipment and product differentiation, the discharge pipeline of the precondensate produced by the reaction in the precondensation reactor needs to be increased. Therefore, the original three-way valve can not be applied, and a new four-way valve needs to be developed to meet the requirements of the workers.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the not enough of prior art existence, provide a sealed reliable cross valve.

The utility model provides an above-mentioned technical problem's technical scheme as follows: a four-way valve comprises an assembly welding pipe seat, three assembly welding valve bodies and three valve rods; the assembly welding pipe seat comprises an inlet pipe, and one end of the inlet pipe is communicated with three branch pipes; the assembly welding valve body comprises an elbow, outlet pipes and a valve rod barrel, the elbow is communicated with the branch pipes, the outlet pipes are communicated with the elbow, the three outlet pipes are parallel to the inlet pipe, and the valve rod barrel is connected to the connecting position of the elbow and the outlet pipes; the top of return bend is equipped with the valve clack, the valve clack with it is sealed through the wedge face between the return bend, the valve rod is followed a valve rod section of thick bamboo stretches into in the valve clack, in the valve clack the cover is equipped with to the ring, the valve clack below the cover is equipped with the guide holder on the valve rod, the guide holder passes through the bolt fastening on the valve clack, the bottom of valve rod is connected with actuating mechanism.

The utility model discloses further set up to, in the valve rod section of thick bamboo the packing layer is equipped with on the valve rod, be equipped with the packing on the packing layer and press the cover, be fixed with gland on the packing is pressed and is sheathe in.

The utility model discloses further set up to, the packing layer includes the spacer ring and the filler unit of spacer ring bilateral symmetry distribution, the filler unit includes that forward last V type packs and reverse lower V type packs.

The utility model discloses further set up to, actuating mechanism with between the valve rod section of thick bamboo be equipped with the support on the valve rod, the support with be connected with the stand between the valve rod section of thick bamboo.

The utility model discloses further set up to, be fixed with the rotation-preventing plate on the valve rod, the both ends of rotation-preventing plate can be followed the stand slides.

The utility model discloses further set up to, be fixed with the stop collar on the stand, the rotation-proof plate is located the stop collar with between the support.

The utility model is further provided that the branch pipe comprises a body pipe and a taper pipe; the body tube is connected to the bottom of the inlet tube, the conical tube is connected to the bottom of the body tube, and the bottom of the conical tube is in a closed-up shape; an inlet jacket sleeve is arranged outside the inlet pipe, jacket sleeves are arranged outside the body pipe and the taper pipe, the jacket sleeves are connected with the inlet jacket sleeve, and a side heat medium pipe is connected to each jacket sleeve; the joints of the three body pipes are connected with a bottom heat medium pipe.

The utility model discloses further set up as, the taper pipe with be lower flange between the double-layered sleeve pipe.

The utility model discloses further set up to, the top of return bend is connected with the flange, the return bend outside is equipped with the valve body jacket pipe, the outlet pipe outside is equipped with the export jacket pipe, be equipped with the packing box in the valve rod section of thick bamboo, be connected with valve body heat medium pipe on the valve body jacket pipe.

The utility model discloses further set up to, be connected with the lug on the upper flange.

To sum up, the utility model discloses following beneficial effect has:

1) the inlet pipe of the assembly welding valve body and the 3 outlet pipes of the assembly welding pipe seat are arranged in parallel, and the valve rod can independently control the opening and closing of the 3 outlet pipes to form a four-way valve, so that the requirement of product differentiation is met.

2) The packing layer can realize two-way sealing, can effectively prevent air from entering the medium, and meets the requirement of vacuum working condition.

3) The guide seat can guide the whole opening and closing process of the valve clack, so that the valve clack is prevented from deflecting due to the impact of media in the opening and closing process, and the long-term leakage-free and vacuum degree requirement of the valve is guaranteed.

Drawings

Fig. 1 is a schematic structural view (looking down from the inlet pipe) of an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a schematic view of a structure of a build-up socket (viewed from the inlet tube in a downward direction);

FIG. 4 is a schematic cross-sectional view taken along line B-B of FIG. 3;

FIG. 5 is a schematic sectional view of an assembly-welded valve body;

fig. 6 is a schematic structural diagram of a packing unit.

Wherein, 1-assembly welding pipe seat, 1 a-inlet pipe, 1 b-inlet jacket sleeve, 1 c-body pipe, 1 d-jacket sleeve, 1 e-side heat medium pipe, 1 f-taper pipe, 1 g-lower flange, 1 h-bottom heat medium pipe, 2-valve clack, 3-split ring, 4-guide seat, 5-bolt, 6-assembly welding valve body, 6 a-upper flange, 6 b-elbow, 6 c-valve body jacket sleeve, 6 d-outlet pipe, 6 e-outlet jacket sleeve, 6 f-packing box, 6 g-valve body heat medium pipe, 6 h-lifting lug, 6 i-valve rod cylinder, 7-stud, 8-nut, 9-valve rod, 10-packing unit, 10 a-upper V-shaped packing, 10 b-lower V-shaped packing, 10 h-lower V-shaped packing, 11-spacer ring, 12-packing pressing sleeve, 13-packing pressing cover, 14-spacing sleeve, 15-packing pressing stud, 16-packing pressing nut, 17-upright post, 18-anti-rotation plate, 19-bracket and 20-actuating mechanism.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

A four-way valve is shown in figures 1 and 2 and comprises an assembly welding pipe seat 1, three assembly welding valve bodies 6 and three valve rods 9, wherein the assembly welding pipe seat 1 and the assembly welding valve bodies 6 can be fixed through a stud 7 and a nut 8. The assembly welding pipe seat 1 comprises an inlet pipe 1a, and one end of the inlet pipe 1a is communicated with three branch pipes. The assembly welding valve body 6 comprises an elbow pipe 6b, outlet pipes 6d and a valve rod cylinder 6i, wherein the elbow pipe 6b is communicated with branch pipes, the outlet pipes 6d are communicated with the elbow pipe 6b, the three outlet pipes 6d are parallel to the inlet pipe 1a, and the valve rod cylinder 6i is connected at the joint of the elbow pipe 6b and the outlet pipes 6 d. The top of the elbow 6b is provided with a valve clack 2, the valve clack 2 and the elbow 6b are sealed through a wedge surface, a valve rod 9 extends into the valve clack 2 from a valve rod cylinder 6i, a split ring 3 is sleeved on the valve rod 9 in the valve clack 2, a guide seat 4 is sleeved on the valve rod 9 below the valve clack 2, the guide seat 4 is fixed on the valve clack 2 through a bolt, the upper part of the valve rod 9 and the valve clack 2 form a whole, and the lower part of the valve rod 9 is connected with an.

Further, the valve rod 9 sequentially passes through the split ring 3, the guide seat 4, the packing layer, the packing pressing sleeve 12, the packing pressing cover 13, the anti-rotation plate 18 and the support 19 from top to bottom. The top of the packing gland 13 is locked and fixed by a packing gland stud 15 and a packing gland nut 16. The packing layer comprises a spacing ring 11, and symmetrical packing units 10 are arranged on two sides of the spacing ring 11.

The post 17 secures the bracket 19 to the assembly-welded valve body 6. An anti-rotation plate 18 is fixed on the valve rod 9, and two ends of the anti-rotation plate 18 can slide along the upright post 17. The sliding mode includes that a sliding groove is arranged on the upright post 17, and two ends of the anti-rotation plate 18 are inserted into the sliding groove and slide along the sliding groove; and secondly, connecting upper sliding sleeves at two ends of the anti-rotation plate 18, and sleeving the upper sliding sleeves on the upright posts 17 to realize sliding along the upright posts 17. The actuator 20 rotates to drive the valve rod 9 and performs lifting movement under the limitation of the anti-rotation plate 18, so that the communication or the cut-off of the medium is realized.

The upright post 17 is fixed with a stop collar 14, and an anti-rotation plate 18 is positioned between the stop collar 14 and a bracket 19. The stop collar 14 is arranged on the upright post 17 and fixed by a set screw, and the maximum opening position of the valve is limited by an anti-rotation plate.

The assembly socket 1 has a structure as shown in fig. 3 and 4, and includes an inlet pipe 1a, an inlet jacket 1b, a body pipe 1c, a jacket 1d, a side heat medium pipe 1e, a taper pipe 1f, a lower flange 1g, and a bottom heat medium pipe 1h, and branch pipes including the body pipe 1c and the taper pipe 1 f. The top of the inlet pipe 1a is welded to the pipe by butt welding and the bottom is welded to the 3 body pipes 1 c. The body tube 1c is welded with the taper tube 1f and the lower flange 1g in sequence downwards from the inlet tube 1a, and three discharge ports are formed downwards after welding. The inlet pipe 1a and the body pipe 1c, the taper pipe 1f and the lower flange 1g are welded to form a complete inner cavity, and the flow channels are polished after welding, so that the melt medium is prevented from being attached and retained or accumulated in the flow channels to influence the melt quality in the conveying process. The top of the inlet jacket sleeve 1b is welded with the pipeline in a butt welding mode, the bottom of the inlet jacket sleeve is welded with 3 jacket sleeve 1d, and the jacket sleeve 1d is welded with the lower flange 1g to form a complete jacket. The jacket and the inner cavity of the assembly welding pipe seat 1 are connected with a heat medium to preserve the heat of the conveyed melt medium, so that the flow speed of the melt medium is ensured, and the melt degradation, hue deterioration and quality reduction caused by overlong retention time of the melt medium in a pipeline are avoided. The side heat medium pipe 1e and the bottom heat medium pipe 1h are beneficial to the flow of the heat medium, and the phenomenon that the local position of the assembly welding pipe seat 1 generates overburning to influence the quality of the melt is prevented.

The structure of the assembly-welded valve body 6 is shown in fig. 5, and comprises an upper flange 6a, an elbow pipe 6b, a valve body jacket 6c, an outlet pipe 6d, an outlet jacket 6e, a stuffing box 6f, a valve body heat medium pipe 6g, a lifting lug 6h and a valve rod barrel 6 i. And hard alloy is welded on the sealing surface of the upper flange 6a in a surfacing mode, so that the wear resistance, the scouring resistance and the corrosion resistance of the valve are guaranteed. The elbow 6b is welded with the upper flange 6a and then welded with the outlet pipe 6d to form a complete inner cavity, and the flow channels are polished after welding, so that the melt medium is prevented from being attached and retained or accumulated in the flow channels during the conveying process to influence the melt quality. The top of the valve body jacket sleeve 6c is welded with the upper flange 6a, and the lower part of the valve body jacket sleeve is welded with the outlet jacket sleeve 6e to form a complete jacket. The jacket and the inner cavity of the assembly welding valve body 6 are connected with the heat medium to preserve the heat of the conveyed melt medium, so that the flow speed of the melt medium is ensured, and the melt degradation, hue deterioration and quality reduction caused by overlong retention time of the melt medium in a pipeline are avoided. The stuffing box 6f is welded with the elbow pipe 6b and the outlet pipe 6d for installation of the stuffing unit 10, the spacer ring 11, the stuffing press sleeve 12 and the stuffing press cover 13. The valve body heat medium pipe 6g is beneficial to the flow of a heat medium, and the phenomenon that the quality of a melt is influenced by the over-burning phenomenon generated at the local position of the assembly welding valve body 6 is prevented. The lifting lug 6h facilitates assembly and lifting of the valve.

The inlet pipe and the 3 outlet pipes are arranged in the vertical direction after the assembly welding valve body 6 and the assembly welding pipe seat 1 are installed, the valve rod 9 can independently control the opening and closing of the 3 outlet pipes to form a four-way valve, and the requirements of large-scale polyester devices and product differentiation are met.

After the assembly welding pipe seat 1 and the assembly welding valve body 6 are fixed through the stud 7 and the nut 8, a lip-shaped welding sealing structure is adopted at the joint, and the requirement of a vacuum working condition is met.

Specifically, the packing layer comprises a spacing ring 11 and packing units 10 symmetrically distributed on two sides of the spacing ring 11. Referring to fig. 6, the packing unit includes upper V-shaped packing 10a in a forward direction and lower V-shaped packing 10b in a reverse direction. The packing unit 10 can really realize bidirectional sealing, can effectively prevent air from entering a medium, and meets the requirement of a vacuum working condition.

Furthermore, the guide seat 4 can guide the whole opening and closing process of the valve clack 2, so that the valve clack 2 is prevented from deflecting due to the impact of a medium in the opening and closing process, and the valve is ensured to meet the requirements of no leakage and vacuum degree for a long time.

The above description is only for the preferred embodiment of the present invention, and should not be construed as limiting the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A four-way valve is characterized by comprising an assembly welding pipe seat, three assembly welding valve bodies and three valve rods; the assembly welding pipe seat comprises an inlet pipe, and one end of the inlet pipe is communicated with three branch pipes; the assembly welding valve body comprises an elbow, outlet pipes and a valve rod barrel, the elbow is communicated with the branch pipes, the outlet pipes are communicated with the elbow, the three outlet pipes are parallel to the inlet pipe, and the valve rod barrel is connected to the connecting position of the elbow and the outlet pipes; the top of return bend is equipped with the valve clack, the valve clack with it is sealed through the wedge face between the return bend, the valve rod is followed a valve rod section of thick bamboo stretches into in the valve clack, in the valve clack the cover is equipped with to the ring, the valve clack below the cover is equipped with the guide holder on the valve rod, the guide holder passes through the bolt fastening on the valve clack, the bottom of valve rod is connected with actuating mechanism.

2. The four-way valve according to claim 1, wherein a packing layer is mounted on the valve stem in the valve stem cylinder, a packing pressing sleeve is mounted on the packing layer, and a packing pressing cover is fixed on the packing pressing sleeve.

3. The four-way valve of claim 2 wherein the packing layer comprises a spacer ring and packing elements symmetrically distributed on both sides of the spacer ring, wherein the packing elements comprise a forward upper V-shaped packing and a reverse lower V-shaped packing.

4. The four-way valve according to claim 1, wherein a bracket is disposed on the valve stem between the actuator and the valve stem cylinder, and a post is connected between the bracket and the valve stem cylinder.

5. The four-way valve according to claim 4, wherein an anti-rotation plate is fixed to the valve stem, and both ends of the anti-rotation plate can slide along the column.

6. The four-way valve according to claim 5, wherein a stop collar is fixed on the column, and the anti-rotation plate is positioned between the stop collar and the bracket.

7. The four-way valve of claim 1, wherein the manifold comprises a body tube and a cone tube; the body tube is connected to the bottom of the inlet tube, the conical tube is connected to the bottom of the body tube, and the bottom of the conical tube is in a closed-up shape; an inlet jacket sleeve is arranged outside the inlet pipe, jacket sleeves are arranged outside the body pipe and the taper pipe, the jacket sleeves are connected with the inlet jacket sleeve, and a side heat medium pipe is connected to each jacket sleeve; the joints of the three body pipes are connected with a bottom heat medium pipe.

8. The four-way valve of claim 7 wherein a lower flange is disposed between the cone and the jacketed pipe.

9. The four-way valve according to claim 1, wherein an upper flange is connected to the top of the elbow, a valve body jacket is arranged outside the elbow, an outlet jacket is arranged outside the outlet pipe, a stuffing box is arranged in the valve rod barrel, and a valve body heat medium pipe is connected to the valve body jacket.

10. The four-way valve according to claim 9, wherein a lifting lug is connected to the upper flange.