Transmission mechanism for connecting valve rod and valve clack of small-caliber stop valve through steel ball

Abstract

The utility model relates to the technical field of stop valves, and discloses a transmission mechanism for connecting a valve rod and a valve clack of a small-caliber stop valve through a steel ball, which comprises a valve body, the valve clack and a valve body cavity, the valve rod is arranged in the valve body cavity, the valve clack is arranged at the lower end of the valve rod, and the upper end of the valve rod penetrates through the valve body cavity and extends to the outside. A plurality of evenly-distributed small holes are formed in the upper end of the side wall of the valve clack, arc grooves are formed in the lower end of the outer surface of the valve rod and located at the small holes of the valve clack, and steel balls are placed in the small holes of the valve clack. According to the transmission mechanism for connecting the valve rod and the valve clack of the small-caliber stop valve through the steel balls, by arranging the steel balls, viscous grease can be effectively used for stabilizing the steel balls, the transmission mechanism can be conveniently placed in the valve body cavity, overall installation is convenient, the inner wall of the valve body cavity can play a role in limiting the steel balls, and the steel balls are effectively prevented from being separated from the small holes; the valve rod is effectively connected with the valve clack through the steel ball, the valve rod drives the valve clack to move up and down, and force transmission or action requirements are met.

Description

Technical Field

[0001] The utility model relates to the technical field of stop valves, in particular to a transmission mechanism in which a valve stem and a valve flap of a small-caliber stop valve are connected by a steel ball. Background Art

[0002] Y-type small-diameter stop valve is a special type of stop valve with Y-type structural characteristics and is suitable for smaller pipe diameters. It is mainly used to cut off or regulate the fluid in the fluid pipeline. Its main function is to prevent the medium from flowing back and ensure the normal operation of the pipeline system.

[0003] At present, high-temperature and high-pressure Y-type small-diameter stop valves are often needed in hydrogenation units in the petroleum refining industry. However, for small-diameter high-pressure stop valves, the small valve cavity limits the small valve disc diameter, and the high pressure requires a large valve stem diameter. The application of traditional valve disc glands or other connection types is limited by size, making the design difficult to implement, and the installation and disassembly steps are cumbersome, which is inconvenient for later maintenance. Therefore, it is necessary to provide a transmission mechanism for connecting the valve stem and valve disc of the small-diameter stop valve with a steel ball to solve the above problems. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a transmission mechanism in which a valve stem and a valve disc of a small-caliber stop valve are connected by a steel ball, thereby solving the problems mentioned in the above background.

[0005] The utility model provides the following technical solution: a transmission mechanism in which a valve stem and a valve disc of a small-caliber stop valve are connected by a steel ball, comprising:

[0006] A valve body, wherein a fluid passage is provided at the lower end of the valve body;

[0007] A valve flap, wherein the valve flap is arranged inside the valve body;

[0008] A valve body cavity is provided at the upper end of the interior of the valve body, and the valve body cavity is communicated with the interior of the fluid channel. A valve stem is arranged inside the valve body cavity, and the valve flap is arranged at the lower end of the valve stem. The upper end of the valve stem extends through the valve body cavity to the outside, and a plurality of evenly distributed small holes are provided at the upper end of the side wall of the valve flap. An arc groove is provided at the lower end of the outer surface of the valve stem and at the position of the small hole of the valve flap, and a steel ball is placed in the small hole of the valve flap.

[0009] Preferably, the valve flap is slidably connected to the inner wall of the valve body cavity, the valve stem is connected to the valve flap via a steel ball, and the interior of the valve flap is hollow.

[0010] Preferably, one or more steel balls are placed inside each of the small holes, the steel ball located innermost in the small hole is tangent to the valve stem, and the steel ball located outermost in the small hole is tangent to the outer diameter of the valve disc.

[0011] Preferably, the small hole located outside the steel ball is filled with viscous grease.

[0012] Preferably, a clamping platform is provided at the lower end of the valve flap, and a buffer component is arranged inside the valve flap through the clamping platform.

[0013] Preferably, the buffer assembly comprises a limit block, a buffer spring and a buffer plate, the limit block is fixedly arranged on the upper end surface of the card table, and the limit block is detachable.

[0014] Preferably, the buffer spring is arranged on the lower end surface of the limiting block, and the lower end of the buffer spring is connected to the buffer plate.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] 1. The valve stem and valve disc of the small-diameter stop valve are connected by a transmission mechanism with a steel ball. By providing a steel ball, the viscous grease can be effectively used to stabilize the steel ball, making it easy to place the transmission mechanism into the valve body cavity. The overall installation is convenient, and the inner wall of the valve body cavity can limit the steel ball, effectively preventing the steel ball from escaping from the small hole. The valve stem is effectively connected to the valve disc through the steel ball, and the valve stem drives the valve disc to move up and down to achieve force transmission or action requirements.

[0017] 2. The transmission mechanism of the small-diameter stop valve stem and valve disc connected by a steel ball is provided with a buffer component. When the fluid flows inside the fluid channel and just contacts the valve disc, it will produce a large impact force on the valve disc. The buffer plate at the bottom of the valve disc will squeeze the buffer spring and shrink toward the inside of the valve disc under the force. The contraction of the buffer spring can effectively buffer a certain force and extend the service life of the valve stem and valve disc. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the transmission mechanism of the small-caliber stop valve of the utility model, in which the valve stem and valve disc are connected by a steel ball;

[0019] Figure 2 It is a partial cross-sectional view of the transmission mechanism of the small-caliber stop valve of the utility model, in which the valve stem and valve disc are connected by a steel ball;

[0020] Figure 3 This is a schematic diagram of the structure of the valve stem of the utility model;

[0021] Figure 4 It is a structural schematic diagram of the valve disc of the utility model;

[0022] Figure 5 The utility model is a structural schematic diagram of a small-diameter stop valve in which a transmission mechanism connected by a steel ball and a valve disc is installed on a valve body.

[0023] In the figure: 1. valve body; 101. fluid channel; 102. valve body cavity; 2. valve stem; 201. arc groove; 3. valve disc; 301. small hole; 302. clamping table; 4. steel ball; 5. buffer assembly; 501. limit block; 502. buffer spring; 503. buffer plate. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-5 , the transmission mechanism of the small-diameter stop valve stem and valve disc connected by a steel ball includes:

[0026] A valve body 1, wherein a fluid passage 101 is provided at the lower end of the valve body 1;

[0027] A valve flap 3, wherein the valve flap 3 is arranged inside the valve body 1;

[0028] A valve body cavity 102 is provided at the upper end of the interior of the valve body 1, and the valve body cavity 102 is communicated with the interior of the fluid channel 101. A valve stem 2 is arranged inside the valve body cavity 102, and a valve disc 3 is arranged at the lower end of the valve stem 2. The upper end of the valve stem 2 extends to the outside through the valve body cavity 102, and a plurality of evenly distributed small holes 301 are provided at the upper end of the side wall of the valve disc 3. An arc groove 201 is provided at the lower end of the outer surface of the valve stem 2 and at the position of the small hole 301 of the valve disc 3, and a steel ball 4 is placed in the small hole 301 of the valve disc 3.

[0029] Among them; the valve disc 3 is slidably connected to the inner wall of the valve body cavity 102, the valve stem 2 is connected to the valve disc 3 through the steel ball 4, the valve disc 3 is hollow inside, and one or more steel balls 4 are placed inside each small hole 301. The steel ball 4 located at the innermost part of the small hole 301 is tangent to the valve stem 2, and the steel ball 4 located at the outermost part of the small hole 301 is tangent to the outer diameter of the valve disc 3. The inner wall of the valve body cavity 102 can limit the steel ball 4, effectively preventing the steel ball 4 from leaving the small hole 301, and the valve stem 2 is effectively connected to the valve disc 3 through the steel ball 4, so that the valve stem 2 drives the valve disc 3 to move up and down, thereby realizing force transmission or action requirements.

[0030] Among them, the small hole 301 and the outside of the steel ball 4 are filled with viscous grease. The viscous grease can be effectively used to stabilize the steel ball 4, making it easy to put the transmission mechanism into the valve body cavity 102. The overall installation is convenient and easy to disassemble and repair later, saving time and effort.

[0031] Among them; a clamping platform 302 is opened at the lower end of the valve disc 3, and a buffer component 5 is arranged inside the valve disc 3 through the clamping platform 302. The buffer component 5 includes a limit block 501, a buffer spring 502 and a buffer plate 503. The limit block 501 is fixedly set on the upper end surface of the clamping platform 302, and the limit block 501 is detachable. The clamping platform 302 is provided to facilitate the installation and fixing of the limit block 501. The limit block 501 is detachable, which is convenient for later maintenance or replacement of the buffer component 5.

[0032] Among them; the buffer spring 502 is arranged on the lower end surface of the limit block 501, and the lower end of the buffer spring 502 is connected to the buffer plate 503. When the fluid flows inside the fluid channel 101 and just contacts the valve flap 3, it will generate a large impact force on the valve flap 3. The buffer plate 503 at the bottom of the valve flap 3 will squeeze the buffer spring 502 and shrink into the inside of the valve flap 3 under the force. The contraction of the buffer spring 502 can effectively buffer a certain force and extend the service life of the valve stem 2 and the valve flap 3.

[0033] Working principle: by providing viscous grease, it can be effectively used to stabilize the steel ball 4, making it convenient to place the transmission mechanism into the valve body cavity 102; the steel ball 4 located at the innermost part of the small hole 301 is tangent to the valve stem 2, and the steel ball 4 located at the outermost part of the small hole 301 is tangent to the outer diameter of the valve disc 3; the inner wall of the valve body cavity 102 can limit the steel ball 4, effectively preventing the steel ball 4 from leaving the small hole 301; the valve stem 2 is effectively connected with the valve disc 3 through the steel ball 4, so that the valve stem 2 drives the valve disc 3 to move up and down, realizing force transmission or action requirements; the overall installation is convenient, and it is easy to disassemble and repair later, saving time and effort.

[0034] Furthermore, when the fluid flows inside the fluid channel 101 and just contacts the valve flap 3, a large impact force will be generated on the valve flap 3. The buffer plate 503 at the bottom of the valve flap 3 will be squeezed by the buffer spring 502 and shrink toward the inside of the valve flap 3. The contraction of the buffer spring 502 can effectively buffer a certain force and extend the service life of the valve stem 2 and the valve flap 3.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. The transmission mechanism of the small-diameter stop valve stem and valve disc connected by a steel ball includes: A valve body (1), wherein a fluid passage (101) is provided at a lower end of the interior of the valve body (1); A valve flap (3), wherein the valve flap (3) is arranged inside the valve body (1); The invention is characterized in that a valve body cavity (102) is provided at the upper end of the valve body (1), the valve body cavity (102) is communicated with the inside of the fluid channel (101), a valve stem (2) is arranged inside the valve body cavity (102), the valve flap (3) is arranged at the lower end of the valve stem (2), the upper end of the valve stem (2) passes through the valve body cavity (102) and extends to the outside, a plurality of evenly distributed small holes (301) are provided at the upper end of the side wall of the valve flap (3), an arc groove (201) is provided at the lower end of the outer surface of the valve stem (2) and located at the position of the small hole (301) of the valve flap (3), and a steel ball (4) is placed in the small hole (301) of the valve flap (3).

2. The transmission mechanism for connecting the valve stem and valve disc of a small-diameter stop valve with a steel ball according to claim 1 is characterized in that: The valve flap (3) is slidably connected to the inner wall of the valve body cavity (102), the valve stem (2) is connected to the valve flap (3) via a steel ball (4), and the interior of the valve flap (3) is hollow.

3. The transmission mechanism for connecting the valve stem and valve disc of a small-diameter stop valve with a steel ball according to claim 1 is characterized in that: One or more steel balls (4) are placed inside each of the small holes (301); the steel ball (4) located innermost in the small hole (301) is tangent to the valve stem (2), and the steel ball (4) located outermost in the small hole (301) is tangent to the outer diameter of the valve flap (3).

4. The transmission mechanism for connecting the valve stem and valve disc of a small-diameter stop valve with a steel ball according to claim 1 is characterized in that: The small hole (301) and the outer side of the steel ball (4) are filled with viscous grease.

5. The transmission mechanism for connecting the valve stem and valve disc of a small-diameter stop valve with a steel ball according to claim 1 is characterized in that: A clamping platform (302) is provided at the lower end of the valve flap (3), and a buffer component (5) is arranged inside the valve flap (3) through the clamping platform (302).

6. The transmission mechanism for connecting the valve stem and valve disc of a small-diameter stop valve with a steel ball according to claim 5 is characterized in that: The buffer assembly (5) comprises a limit block (501), a buffer spring (502) and a buffer plate (503); the limit block (501) is fixedly arranged on the upper surface of the card table (302); and the limit block (501) is detachable.

7. The transmission mechanism for connecting the valve stem and valve disc of a small-diameter stop valve with a steel ball according to claim 6, characterized in that: The buffer spring (502) is arranged on the lower end surface of the limiting block (501), and the lower end of the buffer spring (502) is connected to the buffer plate (503).

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