CN217927206U

CN217927206U - Stop valve of high leakproofness

Info

Publication number: CN217927206U
Application number: CN202221045366.7U
Authority: CN
Inventors: 付保现; 吴保成; 吴超
Original assignee: Zhengzhou Yuhua Valve Co ltd
Current assignee: Zhengzhou Yuhua Valve Co ltd
Priority date: 2022-04-30
Filing date: 2022-04-30
Publication date: 2022-11-29
Anticipated expiration: 2032-04-30

Abstract

A stop valve with high sealing performance comprises a valve rod, a valve seat and a valve body, wherein the valve seat comprises a round first valve seat and a second valve seat positioned between the valve rod and the first valve seat; the first valve seat and the second valve seat are circular, the diameter of the second valve seat is larger than that of the first valve seat, the first valve core matched with the first valve seat is installed at the end part of the valve rod, the second valve core matched with the second valve seat is installed on the valve rod, the diameter of the second valve core can be changed when the second valve core is matched with the second valve core, and the valve further comprises an adjusting assembly, and the adjusting assembly can adjust the diameter of the second valve core. The valve core has the advantages that the attaching area between the valve core and the valve seat is increased, the impact resistance of the valve core is improved, meanwhile, the abrasion generated when the valve core is opened and closed is reduced, and the service life of the valve core is prolonged.

Description

Stop valve of high leakproofness

Technical Field

The utility model relates to a valve equipment technical field especially relates to a stop valve of high leakproofness.

Background

The stop valve is a general valve widely used in chemical, pharmaceutical, electric and metallurgical industries. The valve clack of the existing stop valve usually adopts a plane sealing mode, so that a sealing surface of the valve clack is tightly attached to a sealing surface of a valve seat, and medium circulation is prevented. The existing stop valve is sealed only by adopting a single sealing surface, and the valve usually adopts a rubber ring to surround a valve core, so that the rubber ring and a valve seat are extruded to form sealing, and when the fluid pressure is higher, the valve is easy to impact to cause the leakage condition, and the sealing effect is influenced.

SUMMERY OF THE UTILITY MODEL

In view of the above situation, the object of the present invention is to provide a method for overcoming the defects of the prior art

The solution is that the stop valve with high sealing performance comprises a valve rod and a valve seat, and further comprises a valve seat, wherein the valve seat comprises a round first valve seat and a second valve seat positioned between the valve rod and the first valve seat; the valve comprises a valve rod, a first valve seat, a second valve seat, a first valve core, an adjusting assembly and a second valve core, wherein the first valve seat and the second valve seat are circular, the diameter of the second valve seat is larger than that of the first valve seat, the first valve core is installed at the end part of the valve rod and matched with the first valve seat, the second valve core matched with the second valve seat is installed on the valve rod, and the diameter of the second valve core can be changed when the second valve core is matched with the second valve core.

Furthermore, the cross section of the first valve seat is isosceles trapezoid, and the first valve core is a circular truncated cone matched with the first valve seat.

Furthermore, the diameter of the second valve seat is larger than that of the larger surface of the first valve core, and a circular groove is formed in the side wall of the second valve seat.

Further, install first commentaries on classics handle and valve rod on the valve rod and be hollow rod, the adjustment subassembly is including rotating the adjusting lever of installing in the valve rod inside, screw-thread fit has the movable block on the adjusting lever, it has branch to have seted up slide opening and slide opening sliding fit on the valve rod, the adjustment subassembly still includes the annular clamping ring of circle, the second case is installed in the clamping ring below for circle shape and the second valve core with the clamping ring coaxial line, the both ends of branch are connected between clamping ring and the movable block respectively, the one end that the second case was kept away from to the adjusting lever stretches out the valve rod and the adjusting lever stretches out one of valve rod and serves and install the second commentaries on classics handle.

Furthermore, a backing plate is arranged on the first valve core, and the first valve core is arranged below the backing plate.

Further, the valve rod is rotatably connected with the backing plate.

Furthermore, a sealing block is arranged in the valve rod, and the adjusting rod and the sealing block are rotationally sealed.

The utility model has the advantages that: make the diameter increase of second case, contact between the lateral wall of second case and second valve holder, realize the sealed to the second valve holder, the leakproofness of valve when closing has been improved, the condition that the valve was revealed is caused in the double-deck sealed reduction fluid impact, diameter through changing the second case, the area of laminating between case and the disk seat is improved, its shock-resistant ability has been increased, the wearing and tearing that produce when having reduced the time of opening and close valve simultaneously, its life has been improved, and it is static completely when the second valve case uses, do not exist and the disk seat between the wearing and tearing, and then its life has been improved greatly.

Drawings

Fig. 1 is a schematic structural view of the whole front interior of the utility model.

Detailed Description

The following describes the embodiments of the present invention in further detail with reference to the attached drawings.

As shown in fig. 1, the high-tightness stop valve comprises a valve rod 2 and a valve seat, and is characterized by further comprising a round first valve seat 12 and a second valve seat 16 positioned between the valve rod 2 and the first valve seat 12; the first valve seat 12 and the second valve seat 16 are both circular, the diameter of the second valve seat 16 is larger than that of the first valve seat 12, the second valve seat 16 is mounted on a first valve core 10 which is arranged at the end part of the valve rod 2 and is matched with the first valve seat 12, a second valve core 15 which is matched with the second valve seat 16 is mounted on the valve rod 2, the diameter of the second valve core 15 can be changed when the second valve core 15 is matched with the second valve core 15, when the valve is used, the valve is mounted on a pipeline which needs to be used, the diameter of the second valve seat 16 is larger than that of the first valve seat 12, so that the cross section of the second valve seat is in a step shape, when the valve is closed, the valve rod 2 is rotated, the valve rod 2 moves up and down through the thread matching between the valve rod 2 and the valve cover, at the moment, the valve rod 2 drives the first valve core 10 and the second valve core 15 to move down, the first valve core 10 passes through the matching between the second valve seat 16 and the first valve seat 12, the sealing of the first valve seat 12 is realized, and the sealing effect of the valve is further improved, at the moment, the second valve core 15 is matched with the second valve seat 16 along with the movement of the valve rod 2, and is provided with an adjusting assembly, the adjusting assembly can adjust the diameter of the second valve core 15, the valve rod 2 is provided with a first rotating handle, the valve rod 2 is a hollow rod, the adjusting assembly comprises an adjusting rod 5 rotatably installed inside the valve rod 2, the adjusting rod 5 is in threaded fit with a moving block 7, the valve rod 2 is provided with a sliding hole 14, a support rod 8 is in sliding fit with the sliding hole 14, the adjusting assembly further comprises a circular pressing ring 9, the second valve core 15 is circular and is coaxial with the pressing ring 9, the second valve core 15 is installed below the pressing ring 9, two ends of the support rod 8 are respectively connected with the pressing ring 9 and the moving block 7, one end of the adjusting rod 5, which is far away from the second valve core 15, extends out of the valve rod 2, and one end of the adjusting rod 5, which extends out of the valve rod 2, is provided with a second rotating handle 4, when the valve rod 2 rotates to the limit during use, the adjusting rod 5 is rotated, so that the moving block 7 moves downwards to drive the second valve core 15 to move downwards, the second valve core 15 moves to the inside of the second valve seat 16, the backing plate 11 is installed on the first valve core 10, the first valve core 10 is installed below the backing plate 11, the second valve core 15 is in contact with the backing plate 11, the adjusting rod 5 is continuously rotated at the moment, the pressing plate is pressed downwards, the diameter of the rubber second valve core 15 is increased, the second valve core 15 is in contact with the side wall of the second valve seat 16, the sealing performance of the valve when the valve is closed is improved, the double-layer sealing reduces the condition that the valve is leaked due to fluid impact, the area where the valve core and the valve seat are attached is increased by changing the diameter of the second valve core 15, the impact resistance of the valve core and the valve seat is improved, when the valve is opened, the adjusting rod 5 is rotated at first, the second valve core 15 is reset under the self elastic action, the valve rod 2 is rotated, the first valve core 10 is separated from the valve seat when the valve seat moves, the valve seat is further, the valve is abraded, the service life of the valve is greatly prolonged, and the service life of the valve is prolonged.

In a specific embodiment, the cross section of the first valve seat 12 is an isosceles trapezoid, the first valve element 10 is in a circular truncated cone shape matched with the first valve seat 12, the diameter of the second valve seat 16 is larger than that of the larger surface of the first valve element 10, a circular groove 13 is formed in the side wall of the second valve seat 16, due to the design of the circular truncated cone shape of the first valve seat 12, abrasion of the valve element to the valve seat when the door is opened can be reduced while the sealing effect is improved, the groove 13 in the second valve seat 16 can increase the area of the second valve element 15 matched with the second valve element, and the sealing effect is further improved.

According to the specific implementation mode, the valve rod 2 is rotatably connected with the base plate 11, the sealing block 6 is arranged inside the valve rod 2, the adjusting rod 5 and the sealing block 6 are rotatably sealed, the rotating valve rod 2 can reduce abrasion of a valve core when the valve is opened and closed, and meanwhile the sealing block 6 can prevent internal fluid from leaking through the sliding hole 14.

The above-mentioned embodiments are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the design concept of the present invention should be included in the protection scope defined by the claims of the present invention.

Claims

1. A stop valve with high sealing performance comprises a valve rod (2) and a valve seat, and is characterized by also comprising a valve body;

the valve seats comprise a round first valve seat (12) and a second valve seat (16) positioned between the valve rod (2) and the first valve seat (12); the first valve seat (12) and the second valve seat (16) are both circular, and the diameter of the second valve seat (16) is larger than that of the first valve seat (12);

the valve comprises a first valve core (10) which is arranged at the end part of a valve rod (2) and is matched with a first valve seat (12), a second valve core (15) which is matched with a second valve seat (16) is arranged on the valve rod (2), and the diameter of the second valve core (15) can be changed when the second valve core (15) is matched with the second valve core (15);

an adjustment assembly is also included that can adjust the diameter of the second spool (15).

2. A high-tightness stop valve according to claim 1, characterized in that the cross section of the first valve seat (12) is isosceles trapezoid and the first valve core (10) is a circular truncated cone shape matched with the first valve seat (12).

3. A high-tightness stop valve according to claim 1, characterized in that the diameter of the second valve seat (16) is larger than the diameter of the larger surface of the first valve core (10), and the side wall of the second valve seat (16) is provided with a circular groove (13).

4. The stop valve with high sealing performance according to claim 1, characterized in that a first rotating handle is installed on the valve rod (2), the valve rod (2) is a hollow rod, the adjusting assembly comprises an adjusting rod (5) rotatably installed inside the valve rod (2), a moving block (7) is in threaded fit with the adjusting rod (5), a sliding hole (14) is formed in the valve rod (2), a supporting rod (8) is in sliding fit with the sliding hole (14), the adjusting assembly further comprises a circular ring-shaped pressing ring (9), the second valve core (15) is circular ring-shaped and is coaxial with the pressing ring (9), the second valve core (15) is installed below the pressing ring (9), two ends of the supporting rod (8) are respectively connected with the pressing ring (9) and the moving block (7), one end, far away from the second valve core (15), of the adjusting rod (5) extends out of the valve rod (2), and one end, extending out of the valve rod (5) out of the valve rod (2), is provided with a second rotating handle (4).

5. A high-tightness stop valve according to claim 1, characterized in that the first valve core (10) is provided with a shim plate (11), and the first valve core (10) is arranged below the shim plate (11).

6. A high-tightness stop valve according to claim 5, characterized in that the valve stem (2) is rotatably connected with the backing plate (11).

7. A stop valve with high sealing performance as claimed in claim 1, characterized in that the sealing block (6) is installed inside the valve rod (2) and the adjusting rod (5) and the sealing block (6) are in rotary sealing.