CN214063806U

CN214063806U - Valve internal part structure with good tight cutting and anti-scouring effects

Info

Publication number: CN214063806U
Application number: CN202023192152.6U
Authority: CN
Inventors: 盛标; 王勇
Original assignee: Jiangsu Jinyiyuan Power Equipment Manufacturing Co ltd
Current assignee: Jiangsu Jinyiyuan Power Equipment Manufacturing Co ltd
Priority date: 2020-12-27
Filing date: 2020-12-27
Publication date: 2021-08-27
Anticipated expiration: 2030-12-27

Abstract

The utility model relates to a valve internals technical field just discloses a tight valve internals structure that cuts off antiscour is effectual, including the disk seat, the top of disk seat is equipped with the valve rod, the top fixedly connected with transition passageway of disk seat, the liquid hole that quantity is a plurality of is all seted up to the left and right sides of transition passageway, the bottom fixed mounting of valve rod has the first case that is located transition passageway inside, the inside movable mounting of first case has the second case, the top fixedly connected with connecting seat of second case, the top fixedly connected with gag lever post of connecting seat, the interior roof fixedly connected with suit of first case is at the reset spring in the gag lever post outside. The valve internal part structure with good tight cutting and anti-scouring effects realizes that two sealing surfaces can be guaranteed to be cut off tightly, when the second valve core is opened, the narrowest part of the sealing surface is at the head of the valve core, the flow velocity at the position is also fastest, and the sealing surface of the valve core can be effectively protected from medium erosion.

Description

Valve internal part structure with good tight cutting and anti-scouring effects

Technical Field

The utility model relates to a valve internals technical field specifically is a tight valve internals structure that cuts off antiscour effectual.

Background

The valves are pipe fittings for opening and closing pipes, controlling flow direction, regulating and controlling parameters (temperature, pressure and flow) of a conveying medium, and can be classified into shut-off valves, check valves, regulating valves and the like according to their functions.

The structure of the stop valve generally comprises a valve body, a valve seat, a valve clack, a valve rod, a valve cover, a support, a transmission mechanism, a sealing element and a mounting part, wherein the valve seat is positioned between an inlet channel and an outlet channel of the valve body, the valve clack is arranged at the lower end of the valve rod, mutually matched sealing surfaces are arranged between the valve clack and the valve seat, the sealing surface of the valve clack and the sealing surface of the valve seat generally adopt overlay welding hard alloy to improve the abrasion performance, but at the moment of opening or closing the valve, because the clearance between the sealing surfaces is very small, the flow velocity of the medium is very high, the pressure difference is very large, the particles in the medium can generate very large scouring to the sealing surfaces, moreover, solid particles are easily mixed between the sealing surfaces to cause pressure injury, which causes untight closing of the sealing pair, leads the sealing surfaces to be quickly washed and damaged to cause leakage, meanwhile, the valve cannot be cut off tightly, so that a valve inner part structure with good tight cutting and scouring resistance effects is provided to solve the problems.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a not enough to prior art, the utility model provides a tight effectual valve internals structure of antiscour that cuts off, it can realize the tight advantage that cuts off to possess the two-stage seal, solved in the twinkling of an eye that the valve is opened or is closed, because the clearance between sealed face is very little, the medium velocity of flow is very high, pressure differential is very big, granule in the medium produces very big washing away to sealed face, and mix with solid particle and cause the crushing between sealed face easily, it is not tight to arouse sealed vice closing, it is bad to make sealed face erodeed very fast, cause the leakage, the problem that the valve can not tightly cut off simultaneously.

(II) technical scheme

In order to realize the purpose that the two-stage seal can realize tight cutting, the utility model provides a following technical scheme: the valve inner part structure comprises a valve seat, wherein a valve rod is arranged at the top of the valve seat, a transition passage is fixedly connected to the top of the valve seat, a plurality of liquid outlet holes are formed in the left side and the right side of the transition passage, a first valve core located inside the transition passage is fixedly mounted at the bottom of the valve rod, a second valve core is movably mounted inside the first valve core, a connecting seat is fixedly connected to the top of the second valve core, a limiting rod is fixedly connected to the top of the connecting seat, and a reset spring sleeved on the outer side of the limiting rod is fixedly connected to the inner top wall of the first valve core.

Preferably, the liquid outlet holes are uniformly arranged on one side of the transition channel at equal intervals, and the number of the liquid outlet holes on the same side is multiple.

Preferably, the bottom of the first valve core is of a missing shape, and a cavity is arranged inside the first valve core.

Preferably, the first valve element is in close contact with the top surface of the valve seat.

Preferably, the top of the valve seat is provided with a liquid guide hole.

Preferably, the bottom of the second valve core is inserted into the liquid guide hole, and the second valve core is in close contact with the liquid guide hole.

(III) advantageous effects

Compared with the prior art, the utility model provides a tight valve internals structure that antiscour effect is good that cuts off possesses following beneficial effect:

the valve internal part structure with good tight cut-off and anti-scouring effects is characterized in that a first valve core and a second valve core are arranged, when a valve rod moves upwards, the first valve core is driven to move upwards, a connecting seat can move downwards through the tension of a return spring, the second valve core moves downwards to ensure that the second valve core is in tight contact with a valve seat, then the first valve core continues to move upwards and is separated from a sealing surface of the valve seat, when the first valve core moves to a certain position, the second valve core cannot move downwards, the first valve core can drive the second valve core to move upwards together, the second valve core is separated from the sealing surface of the valve seat, tight cut-off of two sealing surfaces can be ensured, when the second valve core is opened, the narrowest position of the sealing surface is at the head of the valve core, the flow rate of the position is fastest, and the sealing surface of the valve core can be effectively protected from medium erosion.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural view of the first valve core in an open state according to the present invention;

fig. 3 is a schematic structural diagram of the second valve core in the open state according to the present invention.

In the figure: the valve comprises a valve seat 1, a first valve core 2, a liquid outlet hole 3, a transition channel 4, a second valve core 5, a connecting seat 6, a return spring 7, a limiting rod 8 and a valve rod 9.

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.

Referring to fig. 1-3, a valve internal structure with good tight cut-off and anti-scouring effects comprises a valve seat 1, a valve rod 9 is arranged at the top of the valve seat 1, a transition channel 4 is fixedly connected at the top of the valve seat 1, a plurality of liquid outlet holes 3 are arranged at the left side and the right side of the transition channel 4, the liquid outlet holes 3 at the same side and a plurality of liquid outlet holes 3 at the same side are uniformly and equidistantly arranged at one side of the transition channel 4, a first valve core 2 positioned in the transition channel 4 is fixedly arranged at the bottom of the valve rod 9, the bottom of the first valve core 2 is in a missing shape and is internally provided with a cavity, the first valve core 2 is tightly contacted with the top surface of the valve seat 1, a second valve core 5 is movably arranged in the first valve core 2, the second valve core 5 is movably connected with the inner wall of the first valve core 2 through a shaft seal known in the prior art, a liquid guide hole is arranged at the top of the valve seat 1, the bottom of the second valve core 5 is inserted into the liquid guide hole, the second valve core 5 is in close contact with the liquid guide hole, the top of the second valve core 5 is fixedly connected with a connecting seat 6, the top of the connecting seat 6 is fixedly connected with a limiting rod 8, the inner top wall of the first valve core 2 is fixedly connected with a reset spring 7 sleeved on the outer side of the limiting rod 8, and the reset spring 7 is in a compressed state.

In summary, the valve internal structure with good tight cut-off and anti-scouring effects is provided with the first valve core 2 and the second valve core 5, when the valve rod 9 moves upwards, the first valve core 2 is driven to move upwards, the connecting seat 6 can move downwards through the tension of the return spring 7, the second valve core 5 moves downwards to ensure that the second valve core 5 is in tight contact with the valve seat 1, then the first valve core 2 continues to move upwards and is separated from the sealing surface of the valve seat 1, when the first valve core 2 moves to a certain position, the second valve core 5 can not move downwards, the first valve core 2 can drive the second valve core 5 to move upwards together, so that the second valve core 5 is separated from the sealing surface of the valve seat 1, two sealing surfaces can be ensured to be cut off tightly, when the second valve core 5 is opened, the narrowest sealing surface is at the head of the valve core, the flow rate of the valve core is fastest, and the sealing surface of the valve core can be effectively protected from medium erosion, the problems that at the moment of opening or closing of the valve, due to the fact that gaps among sealing surfaces are small, the flow rate of a medium is high, the pressure difference is large, particles in the medium scour the sealing surfaces greatly, solid particles are mixed between the sealing surfaces easily to cause pressure damage, a sealing pair is not closed tightly, the sealing surfaces are scoured and damaged quickly, leakage is caused, and meanwhile the valve cannot be cut off tightly are solved.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a close effectual valve trim structure of cutting off antiscour, includes disk seat (1), its characterized in that: the improved valve is characterized in that a valve rod (9) is arranged at the top of the valve seat (1), a transition channel (4) is fixedly connected to the top of the valve seat (1), liquid outlet holes (3) with a plurality of quantities are formed in the left side and the right side of the transition channel (4), a first valve core (2) located inside the transition channel (4) is fixedly installed at the bottom of the valve rod (9), a second valve core (5) is movably installed inside the first valve core (2), a connecting seat (6) is fixedly connected to the top of the second valve core (5), a limiting rod (8) is fixedly connected to the top of the connecting seat (6), and a reset spring (7) sleeved on the outer side of the limiting rod (8) is fixedly connected to the inner top wall of the first valve core (2).

2. A valve trim structure that provides tight shut-off and good erosion resistance as defined in claim 1, wherein: the quantity of homonymy is a plurality of even equidistance of play liquid hole (3) is seted up in one side of transition passageway (4).

3. A valve trim structure that provides tight shut-off and good erosion resistance as defined in claim 1, wherein: the bottom of the first valve core (2) is in a missing shape, and a cavity is arranged in the first valve core.

4. A valve trim structure that provides tight shut-off and good erosion resistance as defined in claim 1, wherein: the first valve core (2) is in close contact with the top surface of the valve seat (1).

5. A valve trim structure that provides tight shut-off and good erosion resistance as defined in claim 1, wherein: the top of the valve seat (1) is provided with a liquid guide hole.

6. A valve trim structure that provides tight shut-off and good erosion resistance as defined in claim 5, wherein: the bottom of the second valve core (5) is inserted into the liquid guide hole, and the second valve core (5) is tightly contacted with the liquid guide hole.