CN216279417U - A globe valve with good sealing effect - Google Patents

Abstract

The utility model relates to the technical field of cut-off valves, in particular to a cut-off valve with good sealing effect, comprising a valve body, an installation bracket is fixed on the top of the valve body by bolts, and the top inner wall and the bottom inner wall of the installation bracket are provided with A round hole, the top of the valve body is provided with a threaded hole coaxial with the round hole, the utility model rotates the rotating plate, so that the rotating plate drives the rotating rod, and the rotating rod drives the sealing plate, so that the sealing plates cannot have shunt openings aligned with each other , and then fix the rotating plate through the cooperation of the pull pin and the positioning hole, and then turn the rotating handle, and the rotating handle drives the external thread cylinder to rotate, so that the valve disc moves down, and the contact area between the valve disc and water is reduced, thereby reducing the water leakage. resistance until it comes into contact with the limit ring plate, then pull the pull pin out of the positioning hole, turn the sealing plate to align the sealing plate with the shunt, and then fix it with the pull pin, which saves effort when closing.

Description

A globe valve with good sealing effect

technical field

The utility model relates to the technical field of cut-off valves, in particular to a cut-off valve with good sealing effect.

Background technique

Globe valve, also known as cut-off valve, is a mandatory sealing valve, so when the valve is closed, pressure must be applied to the valve disc to force the sealing surface not to leak. When the medium enters the valve from under the valve disc, the resistance that the operating force needs to overcome is the friction force between the valve stem and the packing and the thrust generated by the pressure of the medium. The force to close the valve is greater than the force to open the valve, so the valve stem The diameter of the valve should be large, otherwise the failure of the top of the valve stem will occur. According to the connection method, it is divided into three types: flange connection, thread connection and welding connection.

When the existing shut-off valve is closed, the water resistance is relatively large, so that a relatively large twisting force is required when the valve is closed.

Utility model content

The purpose of the present invention is to provide a shut-off valve with good sealing effect, so as to solve the problems raised in the above background technology.

The technical scheme of the utility model is as follows: a shut-off valve with good sealing effect comprises a valve body, an installation bracket is fixed on the top of the valve body by bolts, and the inner wall of the top and the inner wall of the bottom of the installation bracket are provided with circular holes, The top of the valve body is provided with a threaded hole coaxial with the circular hole, a threaded transmission assembly is arranged inside the threaded hole and the circular hole, a valve flap is installed at the bottom of the threaded transmission component, and the inside of the valve flap is A cylindrical cavity is opened, a rotating hole is opened in the top middle of the cylindrical cavity, a rotating rod is installed on the inner wall of the rotating hole, and four equidistant distribution ports are opened on the top and bottom of the valve flap, so Four sealing plates distributed at equal distances are fixed at the position of the outer peripheral wall of the rotating rod in the cylindrical cavity, and the sealing plates are suitable for the shunt opening.

Preferably, the thread transmission assembly includes an external thread cylinder and a rotating handle fixed on the top of the external thread cylinder, the external thread cylinder is threadedly connected to the inner wall of the threaded hole, and the rotating rod is located inside the external thread cylinder and is opposite to the outer thread cylinder. contact, the valve flap is fixed on the bottom of the externally threaded cylinder, the top of the rotating handle is provided with eight equidistant annularly distributed positioning holes, the externally threaded cylinder is in contact with the inner wall of the circular hole, and the rotating handle is rotated to rotate the handle. Drive the external thread cylinder to rotate, so that the valve disc moves down.

Preferably, a rotating plate is fixed on the top of the rotating rod, a mounting hole is opened on the side of the top of the rotating plate away from the external threaded cylinder, and the inner wall of the mounting hole is installed with a pull pin adapted to the positioning hole. Cooperating with the positioning hole can prevent the rotating plate from rotating.

Preferably, two fixing rings are fixed on the outer peripheral wall of the externally threaded cylinder, and a stabilizing block is sleeved on the outer peripheral wall of the externally threaded cylinder. The inner walls of both sides of the bracket are provided with chute grooves, the two sides of the stabilizing block are respectively slidably installed on the inner walls of the chute grooves, and the arrangement of the stabilizing blocks can prevent the external thread cylinder from bending.

Preferably, a limit ring plate is fixed in the middle of the inner peripheral wall of the valve body, an inlet pipe and a discharge pipe are respectively inserted into the outer walls on both sides of the valve body, and the insertion places of the inlet pipe and the discharge pipe are respectively located in the limit ring Below and above the plate, the limit ring plate plays the role of dividing, dividing the valve body into upper and lower parts.

Preferably, the top of the limiting ring plate is fixed with a circular ring coaxial with it, the top of the circular ring is provided with an annular V-groove, and the bottom of the valve flap is provided with an annular groove coaxial with the limiting ring plate , the inner wall of the top of the annular groove is fixed with an annular V-block that is adapted to the annular V-groove, and the valve flap is in contact with the limit ring plate. At this time, the annular V-block and the annular V-groove form a bending labyrinth, as shown in the figure. to improve sealing.

The utility model provides a shut-off valve with good sealing effect through improvement, which has the following improvements and advantages compared with the prior art:

One: the utility model rotates the rotating plate, so that the rotating plate drives the rotating rod, and the rotating rod drives the sealing plate, so that the sealing plate cannot have shunt openings aligned with each other, and then the rotating plate is fixed by the mutual cooperation of the pull pin and the positioning hole, and then Rotate the handle, turn the handle to drive the external thread cylinder to rotate, so that the valve disc moves down, and the contact area between the valve disc and the water is reduced, thereby reducing the resistance of the water until it contacts the limit ring plate, and then pulls the pull pin out of position hole, turn the sealing plate to align the sealing plate and the shunt, and then fix it by pulling pins, so that it is more labor-saving when closing;

Second: the valve flap of the present invention is in contact with the limit ring plate, and at this time, the annular V block and the annular V groove form a bending labyrinth, thereby improving the sealing performance.

Description of drawings

Below in conjunction with accompanying drawing and embodiment, the utility model is further explained:

Fig. 1 is the three-dimensional structure schematic diagram of the present utility model;

Fig. 2 is the internal structure schematic diagram of the present utility model;

Fig. 3 is the enlarged schematic diagram at A of Fig. 2;

Fig. 4 is the schematic diagram of the normal section structure of the present utility model;

FIG. 5 is an enlarged schematic view of the structure at B of FIG. 2 .

Description of reference numbers:

1. Valve body; 2. Inlet pipe; 3. Mounting bracket; 4. Stabilizing block; 5. Fixing ring; 6. External thread barrel; 7. Rotating handle; 8. Rotating plate; 9. Pull pin; 10. Discharge pipe ; 11, rotating rod; 12, valve disc; 13, sealing plate; 14, limit ring plate; 15, ring.

Detailed ways

The present utility model will be described in detail below, and the technical solutions in the embodiments of the present utility model will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

The utility model provides a shut-off valve with good sealing effect through improvement, and the technical scheme of the utility model is:

As shown in Figures 1 to 5, a shut-off valve with good sealing effect includes a valve body 1, the top of the valve body 1 is fixed with a mounting bracket 3 by bolts, and the top inner wall and the bottom inner wall of the mounting bracket 3 are provided with round holes , the top of the valve body 1 is provided with a threaded hole coaxial with the circular hole, the threaded hole and the circular hole are provided with a threaded transmission assembly, the bottom of the threaded transmission assembly is installed with a valve disc 12, and the interior of the valve disc 12 is provided with a cylindrical cavity , the top middle of the cylindrical cavity is provided with a rotating hole, the inner wall of the rotating hole is rotatably installed with a rotating rod 11, the top and bottom of the valve flap 12 are provided with four equidistant distribution ports, and the outer peripheral wall of the rotating rod 11 is located in the cylindrical cavity. Four equally spaced sealing plates 13 are fixed at the inner position, and the sealing plates 13 are suitable for the shunt opening.

Further, the thread transmission assembly includes an external thread cylinder 6 and a rotating handle 7 fixed on the top of the external thread cylinder 6. The external thread cylinder 6 is threadedly connected to the inner wall of the threaded hole, and the rotating rod 11 is located inside the external thread cylinder 6 and is opposite to each other. Contact, the valve flap 12 is fixed on the bottom of the external thread cylinder 6, the top of the rotating handle 7 is provided with eight equidistant annularly distributed positioning holes, the external thread cylinder 6 is in contact with the inner wall of the circular hole, the rotating handle 7 is rotated, and the rotating handle 7 The external thread cylinder 6 is driven to rotate, so that the valve disc 12 moves down.

Further, the top of the rotating rod 11 is fixed with the rotating plate 8, the top of the rotating plate 8 is provided with a mounting hole on the side away from the external thread cylinder 6, and the inner wall of the mounting hole is installed with a pull pin 9 that matches the positioning hole, and the pull pin 9 Cooperating with the positioning holes can prevent the rotating plate 8 from rotating.

Further, two fixing rings 5 are fixed on the outer peripheral wall of the externally threaded cylinder 6, and a stabilizing block 4 is sleeved on the outer peripheral wall of the externally threaded cylinder 6, and the stabilizing block 4 is located between and in contact with the two fixing rings 5, and the mounting bracket 3 The inner walls of the two sides are provided with chute, the two sides of the stabilizing block 4 are respectively slidably installed on the inner wall of the chute, and the arrangement of the stabilizing block 4 can prevent the external thread cylinder 6 from bending.

Further, a limit ring plate 14 is fixed in the middle of the inner peripheral wall of the valve body 1 , and the inlet pipe 2 and the discharge pipe 10 are respectively inserted into the outer walls of the valve body 1 , and the insertion places of the inlet pipe 2 and the discharge pipe 10 are located at the limit positions respectively. Below and above the ring plate 14 , the limiting ring plate 14 plays a dividing role, dividing the valve body 1 into two parts, the upper and lower parts.

Further, the top of the limiting ring plate 14 is fixed with a circular ring 15 coaxial with it, the top of the circular ring 15 is provided with an annular V-groove, and the bottom of the valve flap 12 is provided with an annular groove coaxial with the limiting ring plate 14, The inner wall of the top of the annular groove is fixed with an annular V-block that matches the annular V-groove. The valve disc 12 is in contact with the limit ring plate 14. At this time, the annular V-block and the annular V-groove form a bending labyrinth, as shown in Figure 5. to improve sealing.

Working principle: Rotate the rotating plate 8, so that the rotating plate 8 drives the rotating rod 11, and the rotating rod 11 drives the sealing plate 13, so that the sealing plate 13 cannot have shunt openings aligned with each other, and then the rotating plate 8 is connected by the pull pin 9 and the positioning hole. Fix it, then turn the rotary handle 7, and the rotary handle 7 drives the external thread cylinder 6 to rotate, so that the valve disc 12 moves down, and the contact area between the valve disc 12 and the water is reduced, thereby reducing the resistance of the water until it is connected with the limit ring plate. 14 contact, then pull the pull pin 9 to disengage the positioning hole, turn the sealing plate 13 to align the sealing plate 13 and the shunt port with each other, and then fix it through the pull pin 9; the valve flap 12 is in contact with the limit ring plate 14, this When the annular V block and the annular V groove form a bending labyrinth, as shown in Figure 5, the sealing performance is improved.

The above description enables those skilled in the art to realize or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (6)

1. A globe valve with good sealing effect, characterized in that it comprises a valve body (1), a mounting bracket (3) is fixed on the top of the valve body (1) by bolts, and the top of the mounting bracket (3) is Both the inner wall and the inner wall of the bottom are provided with circular holes, the top of the valve body (1) is provided with threaded holes coaxial with the circular holes, the threaded holes and the circular holes are provided with threaded transmission components, and the threaded transmission components A valve flap (12) is installed at the bottom of the valve flap (12), a cylindrical cavity is opened inside the valve flap (12), a rotating hole is opened in the top middle of the cylindrical cavity, and a rotating rod (11) is rotatably installed on the inner wall of the rotating hole. The top and bottom of the valve flap (12) are provided with four equidistant distribution ports, and the outer peripheral wall of the rotating rod (11) is fixed in the cylindrical cavity with four equidistantly distributed sealing plates (13), the sealing plate (13) is suitable for the shunt opening. 2. A shut-off valve with good sealing effect according to claim 1, characterized in that: the threaded transmission assembly comprises an externally threaded cylinder (6) and a rotating handle (7) fixed on the top of the externally threaded cylinder (6) , the externally threaded barrel (6) is threaded on the inner wall of the threaded hole, the rotating rod (11) is located inside the externally threaded barrel (6) and is in contact, and the valve flap (12) is fixed on the externally threaded barrel At the bottom of (6), the top of the rotating handle (7) is provided with eight equidistant annularly distributed positioning holes, and the external thread cylinder (6) is in contact with the inner wall of the circular hole. 3. A shut-off valve with good sealing effect according to claim 1, characterized in that: the top of the rotating rod (11) is fixed with a rotating plate (8), and the top of the rotating plate (8) is far away from the outside One side of the threaded barrel (6) is provided with a mounting hole, and the inner wall of the mounting hole is provided with a pull pin (9) adapted to the positioning hole. 4. A shut-off valve with good sealing effect according to claim 2, characterized in that: two fixing rings (5) are fixed on the outer peripheral wall of the externally threaded cylinder (6), and the externally threaded cylinder (6) is fixed with two fixing rings (5). ) is sleeved with a stabilizing block (4), the stabilizing block (4) is located between and in contact with the two fixing rings (5), and the two inner walls of the mounting bracket (3) are provided with sliding grooves , the two sides of the stabilizing block (4) are respectively slidably installed on the inner wall of the chute. 5. A globe valve with good sealing effect according to claim 1, characterized in that: a limiting ring plate (14) is fixed in the middle of the inner peripheral wall of the valve body (1), and the valve body (1) is An inlet pipe (2) and a discharge pipe (10) are respectively inserted into the outer walls on both sides, and the insertion positions of the inlet pipe (2) and the discharge pipe (10) are respectively located below and above the limiting ring plate (14). 6. A shut-off valve with good sealing effect according to claim 5, characterized in that: the top of the limit ring plate (14) is fixed with a circular ring (15) coaxial with it, and the circular ring ( 15) is provided with an annular V-groove at the top, the bottom of the valve flap (12) is provided with an annular groove coaxial with the limiting ring plate (14), and the inner wall of the top of the annular groove is fixed with an annular V-groove. Matching ring V block.

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