CN114877095A - Anti self-aggregation ball valve - Google Patents

Abstract

The invention relates to the technical field of fluid conveying, and discloses an anti-self-gathering ball valve which comprises a valve body, a valve core, a valve seat and a valve rod, wherein a soft sealing ring and two hard sealing parts are arranged on the valve seat at intervals, the two hard sealing parts are coaxially arranged in a way of being matched with the spherical surface of the valve core, and the soft sealing ring is arranged between the two hard sealing parts and is coaxially arranged with the two hard sealing parts in a way of being matched with the spherical surface of the valve core. The damage of accumulation or scaling of the self-assembly substance to the sealing structure of the valve body and the valve core can be reduced, and the service life of the ball valve is prolonged.

Description

Anti self-aggregation ball valve

technical field

The invention relates to the technical field of fluid transportation, in particular to an anti-self-aggregation ball valve.

Background technique

Ball valve or spherical valve, is a kind of throttle valve, named because of its spherical spool. A tight closing can be achieved with a small turning torque. Widely used in petroleum, chemical industry, power generation, papermaking, atomic energy, aviation, rocket and other industries, as well as people's daily life.

The valve body and the valve core of the traditional ball valve are generally sealed with a sealing ring. The sealing ring is arranged on the valve seats on both sides of the valve core corresponding to the inlet and outlet of the ball valve. The sealing ring can be a soft seal or a hard seal. When conveying some media, the sealing of the valve core is prone to form self-polymer accumulation or scaling, which will cause the soft sealing ring to be scratched or the hard sealing ring to be worn when the ball valve is opened and closed, and the sealing performance will decrease, reducing the service life of the ball valve. .

SUMMARY OF THE INVENTION

In view of the deficiencies in the prior art, the present invention proposes an anti-self-aggregation ball valve, which can reduce the damage to the sealing structure of the valve body and the valve core caused by self-polymer accumulation or scaling, and improve the service life of the ball valve.

In order to achieve the above purpose, the anti-self-convergence ball valve of the present invention comprises a valve body, a valve core, a valve seat and a valve stem. The valve seat is provided with a soft sealing ring and two hard sealing parts at intervals, and the two hard sealing parts cooperate with each other. The spherical surface of the valve core is arranged coaxially, and the soft sealing ring is arranged between the two hard sealing parts, and is arranged coaxially with the spherical surface of the valve core and the two hard sealing parts.

In one of the embodiments, the valve seat is slidably arranged on the valve body, and the outer wall of the valve seat is in sealing connection with the inner wall of the valve body; an elastic support member is provided on the valve body, and the valve body is One end of the elastic support is connected with the valve body, and the other end of the elastic support is connected with the corresponding valve seat. The elastic support provides elastic force to make the corresponding valve seat slide toward the valve core, and the soft The sealing ring and the two hard sealing parts are in sealing contact with the valve core.

In one embodiment, the valve seat is provided with an annular installation groove, the installation groove is coaxial with the valve seat, and the notch of the installation groove is disposed toward the valve core; the soft seal One end of the ring passes through the slot of the installation groove and is slidably inserted into the installation groove, the other end of the soft sealing ring abuts against the valve core, and the soft sealing ring is inserted into the installation groove One end of the valve body is sealingly connected with the two inner side walls of the installation groove; the bottom of the installation groove and the soft sealing ring form a closed cavity and are connected with the fluid inlet or the fluid outlet of the corresponding end of the valve body.

In one embodiment, a pressure regulating device is further provided between the bottom of the installation groove and the fluid inlet or the fluid outlet of the corresponding end of the valve body, the pressure regulating device includes a regulating body and a piston, and the regulating body is provided with a pressure regulating device. There is a piston cavity, the piston cavity includes a coaxially arranged first cavity and a second cavity, the first cavity and the second cavity are adjacently arranged; one end of the piston is slidably arranged on the first cavity The other end of the piston is slidably disposed in the second cavity, the cross-sectional areas of the first cavity and the second cavity are not equal; the end of the first cavity away from the piston is different from the second cavity. The installation groove is communicated with, and one end of the second cavity away from the piston is communicated with a fluid inlet or a fluid outlet at the corresponding end of the valve body.

In one embodiment, the regulating body is disposed on the valve body, a drainage groove is provided on the outer wall of the valve seat, and the notch of the drainage groove is disposed toward the inner wall of the valve body, and the drainage groove is disposed on the inner wall of the valve body. Both sides of the groove extend along the sliding direction of the valve seat, and the groove bottom of the drainage groove is communicated with the installation groove; the valve body is provided with a first flow channel and a second flow channel, and the first flow channel is provided with a first flow channel and a second flow channel. One end is communicated with the slot of the drainage groove, the other end of the first flow channel is communicated with the first cavity; one end of the second flow channel is communicated with the second cavity, and the second flow channel is The other end communicates with the fluid inlet or the fluid outlet of the corresponding end of the valve body.

In one embodiment, the drainage groove is arranged around the outer wall of the valve seat, and the valve seat is provided with a plurality of branch flow channels, and the branch flow channels communicate with the installation groove and the drainage groove, so The split flow passages are evenly spaced along the circumference of the valve seat.

In one of the embodiments, the adjusting body and the corresponding valve seat are the same part, and the piston cavity is provided on the corresponding valve seat.

In one embodiment, a support spring is further provided in the installation groove, one end of the support spring is connected to the bottom surface of the installation groove, the other end of the support spring is connected to the soft sealing ring, and the The support spring provides elastic force to make the soft sealing ring abut against the valve core.

In one embodiment, the valve body is provided with a plurality of flushing ports, and the flushing ports communicate with the central cavity of the valve body.

The anti-self-convergence ball valve in the above embodiment has at least the following advantages:

(1) The soft sealing ring is arranged between the two hard sealing parts. When the ball valve is opened and closed, the valve core rotates to make the hard sealing part remove the self-polymer accumulation or scaling on the valve core, so as to prevent the self-polymer accumulation or scaling to the soft The sealing ring is damaged, so as to ensure the sealing performance between the valve core and the valve body and improve the service life of the ball valve.

(2) The elastic support makes the valve seat, the soft sealing ring and the hard sealing part in sealing contact with the valve core, which can compensate the soft sealing ring and the hard sealing part when the soft sealing ring and the hard sealing part are worn, and keep the sealing performance.

(3) When in use, the pressure-holding medium is injected into the first cavity and the installation groove, the conveying medium of the ball valve flows into the second cavity, and the pressure at both ends of the piston can change proportionally, so that the fluid pressure in the installation groove and the relationship between the soft sealing ring and the The contact pressure between the valve cores can increase or decrease synchronously with the pressure of the conveying medium in the ball valve, and the sealing performance between the soft sealing ring and the valve core changes accordingly, so as to ensure the sealing performance and reduce the wear of the soft sealing ring.

(4) The drainage groove and the first flow channel can keep the first cavity in communication with the installation groove when the valve seat slides; the drainage groove is communicated with the installation groove through the flow distribution channel, and the evenly arranged drainage groove enables the soft sealing ring to be evenly stressed. Improve the sealing performance of the soft sealing ring. The support spring makes a certain pressure between the soft sealing ring and the valve core, and also has a certain sealing performance when the installation groove is not filled with pressure-holding medium.

(5) The adjustment body and the corresponding valve seat are the same part, which can simplify the connection structure of the pressure adjustment device and the installation groove and improve the integration degree of the ball valve.

(6) The pressure-holding liquid can be injected into the middle cavity of the valve body from the flushing port to flush the middle cavity of the valve body to prevent and reduce particles and self-polymers from remaining in the middle cavity of the valve body, affecting the sealing performance between the valve core and the valve seat .

Description of drawings

In order to describe the specific embodiments of the present invention more clearly, the accompanying drawings required for the specific embodiments will be briefly introduced below. In all the drawings, elements or sections are not necessarily drawn to actual scale.

1 is a front cross-sectional view of an anti-self-convergence ball valve provided by an embodiment of the present invention;

Fig. 2 is the enlarged view of A shown in Fig. 1;

3 is a schematic structural diagram of a regulating body and a piston according to another embodiment of the present invention;

Reference number:

1- valve body, 11- middle cavity, 12- flushing port, 13- first flow channel, 14- second flow channel, 2- valve core, 3- valve seat, 31- hard seal, 32- installation groove, 33 -Drainage groove, 34-split flow channel, 35-soft sealing ring, 36-support ring, 37-support spring, 4-valve stem, 5-elastic support, 6-adjustment body, 61-piston cavity, 611-section One chamber, 612-second chamber, 7-piston.

Detailed ways

Embodiments of the technical solutions of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only used to more clearly illustrate the technical solutions of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention. It should be noted that, unless otherwise specified, the technical or scientific terms used in this application should have the usual meanings understood by those skilled in the art to which the present invention belongs.

In the description of the present application, it should be understood that the terms "first", "second", etc. are only used for description purposes, and cannot be interpreted as indicating or implying relative importance or implying the number of indicated technical features . "Plurality" means two or more, unless expressly specifically limited otherwise.

In this application, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of the two elements or the interaction relationship between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

1 to 3, the anti-self-aggregation ball valve in one embodiment includes a valve body 1, a valve core 2, a valve seat 3 and a valve stem 4, which can reduce the self-polymer accumulation or scaling on the valve body and the valve core. The damage of the sealing structure increases the service life of the ball valve.

Specifically, the valve body 1 , the valve core 2 , the valve seat 3 and the valve stem 4 are set with reference to the structure of the ball valve in the prior art. The valve seat 3 is annular and is arranged in the valve body 1 , and the valve seat 3 is arranged on both sides of the valve core 2 corresponding to the fluid inlet and the fluid outlet on the valve body. The valve seat 3 is sealingly connected to the valve body 1 and the valve core 2 . The valve stem 4 is used to control the rotation of the valve core 2 and to control the opening and closing of the ball valve.

The valve seat 3 is provided with a soft sealing ring 35 and two hard sealing parts 31 at intervals. The two hard sealing parts 31 are arranged coaxially with the spherical surface of the valve core 2 . The soft sealing ring 35 is arranged between the two hard sealing parts 31 and is coaxially arranged with the two hard sealing parts 31 in cooperation with the spherical surface of the valve core 2 . Specifically, the hard sealing portion 31 is arranged at one end of the corresponding valve seat 3 close to the valve core 2 , and the two hard sealing portions 31 are arranged coaxially inside and outside the radial direction of the valve seat 3 . The soft sealing ring 35 is arranged between the two hard sealing parts 31. When the ball valve is opened and closed, the valve core 2 rotates so that the hard sealing part 31 removes the self-polymer accumulation or scaling on the valve core 2 to prevent the self-polymer accumulation or scaling. The soft sealing ring 35 is damaged, thereby ensuring the sealing performance between the valve core 2 and the valve body 1 and improving the service life of the ball valve.

In one embodiment, the valve seat 3 is slidably arranged on the valve body 1 , and the outer wall of the valve seat 3 is sealedly connected with the inner wall of the valve body 1 . The valve body 1 is provided with an elastic support member 5 , one end of the elastic support member 5 is connected with the valve body 1 , and the other end of the elastic support member 5 is connected with the corresponding valve seat 3 . The elastic support 5 provides elastic force to make the corresponding valve seat 3 slide toward the valve core 2 , and the soft sealing ring 35 and the two hard sealing parts 31 are in sealing contact with the valve core 2 . The elastic support 5 makes the valve seat 3, the soft sealing ring 35 and the hard sealing part 31 in sealing contact with the valve core 2, so that when the soft sealing ring 35 and the hard sealing part 31 are worn, the soft sealing ring 35 and the hard sealing part 31 can be sealed. 31 to compensate to maintain sealing performance. Specifically, the elastic support 5 is a coil spring, and both ends of the coil spring are in contact with the valve seat 3 and the valve body 1 respectively. It can be understood that the elastic support member 5 can also be a support member made of elastic material or other elastic members.

In one embodiment, the valve seat 3 is provided with an annular installation groove 32 , the installation groove 32 is disposed coaxially with the valve seat 3 , and the notch of the installation groove 32 is disposed toward the valve core 2 . One end of the soft sealing ring 35 is slidably inserted into the installation groove 32 through the notch of the installation groove 32 , and the other end of the soft sealing ring 35 is in contact with the valve core 2 . One end of the soft sealing ring 35 inserted into the installation groove 32 is sealedly connected with the two inner side walls of the installation groove 32 . The bottom of the installation groove 32 and the soft sealing ring 35 form a closed cavity and are connected with the fluid inlet or the fluid outlet of the corresponding end of the valve body 1 . Specifically, the soft sealing ring 35 is made of soft sealing material such as rubber or plastic. One end of the soft sealing ring 35 inserted into the installation groove 32 is provided with a support ring 36 made of alloy material such as stainless steel or copper, so as to improve the structural strength of the soft sealing ring 35 . The soft sealing ring 35 can be uniformly sealed and deformed in its circumferential direction. The closed cavity formed by the bottom of the installation groove 32 and the soft sealing ring 35 is directly or indirectly connected with the fluid inlet or fluid outlet of the corresponding end of the valve body 1 through pipelines or other components, so that the fluid inlet or the fluid outlet of the corresponding end of the valve body 1. The pressure can be transmitted and acted on the soft sealing ring 35, so that the soft sealing ring 35 is close to the valve core 2, and changes with the pressure of the conveying medium. When the pressure of the conveying medium is high, the contact pressure between the soft sealing ring 35 and the valve core 2 is correspondingly large, which enhances the sealing performance; when the pressure of the conveying medium is low, the contact pressure between the soft sealing ring 35 and the valve core 2 is correspondingly small. , reducing the wear of the soft sealing ring 35, so that the low soft sealing ring 35 can have a longer service life.

In one embodiment, a pressure regulating device is further provided between the bottom of the installation groove 32 and the fluid inlet or fluid outlet of the corresponding end of the valve body 1 . The pressure regulating device includes a regulating body 6 and a piston 7 . The adjusting body 6 is provided with a piston cavity 61 , and the piston cavity 61 includes a first cavity 611 and a second cavity 612 arranged coaxially, and the first cavity 611 and the second cavity 612 are arranged adjacently. One end of the piston 7 is slidably disposed in the first cavity 611 , and the other end of the piston 7 is slidably disposed in the second cavity 612 , and the cross-sectional areas of the first cavity 611 and the second cavity 612 are different. One end of the first cavity 611 away from the piston 7 is communicated with the installation groove 32 , and one end of the second cavity 612 away from the piston 7 is communicated with the fluid inlet or the fluid outlet of the corresponding end of the valve body 1 . Specifically, the piston 7 is composed of two sections with different diameters. The two sections of the section with a smaller diameter of the piston 7 are respectively arranged in the first cavity 611 and the second cavity 612 , so that the piston 7 can slide in the piston cavity 61 in both directions. . The cavity formed by the connection between the piston 7 and the first cavity 611 and the second cavity 612 can be filled with an appropriate amount of gas or communicated with the atmosphere. In order to facilitate the sliding of the piston 7. When in use, the pressure-holding medium is injected into the first cavity 611 and the installation groove 32, the conveying medium of the ball valve flows into the second cavity 612, and the pressure at both ends of the piston 7 can be proportionally changed, so that the fluid pressure in the installation groove 32 and the soft sealing ring The contact pressure between 35 and the valve core 2 can increase or decrease synchronously with the pressure of the conveying medium in the ball valve, and the sealing performance between the soft sealing ring 35 and the valve core 2 changes correspondingly, so as to ensure the sealing performance and reduce the softness. Wear of the sealing ring 35. The cross-sectional areas of the first cavity 611 and the second cavity 612 are not equal, and the piston 7 correspondingly enlarges or reduces the internal pressure of the second cavity 612 and transmits it to the first cavity 611 to adapt to different fluid delivery requirements.

In one embodiment, the regulating body 6 is provided on the valve body 1 . The outer wall of the valve seat 3 is provided with a drainage groove 33 , the notch of the drainage groove 33 is arranged toward the inner wall of the valve body 1 , the two sides of the drainage groove 33 extend along the sliding direction of the valve seat 3 , and the bottom of the drainage groove 33 is connected with the installation groove. 32 connected. The valve body 1 is provided with a first flow channel 13 and a second flow channel 14 . One end of the first flow channel 13 is communicated with the notch of the drainage groove 33 , and the other end of the first flow channel 13 is communicated with the first cavity 611 . One end of the second flow channel 14 is communicated with the second cavity 612 , and the other end of the second flow channel 14 is communicated with the fluid inlet or the fluid outlet of the corresponding end of the valve body 1 . Specifically, the drainage groove 33 is arranged around the outer wall of the valve seat 3 . The valve seat 3 is provided with a plurality of branch flow channels 34 , and the branch flow channels 34 communicate with the installation groove 32 and the drainage groove 33 . The distribution flow passages 34 are evenly spaced along the circumferential direction of the valve seat 3 . The drainage groove 33 and the first flow channel 13 can keep the first cavity 611 in communication with the installation groove 32 when the valve seat 3 slides; the drainage groove 33 communicates with the installation groove 32 through the flow distribution channel 34, and the evenly arranged drainage grooves 33 make a soft seal The ring 35 can be uniformly stressed, thereby improving the sealing performance of the soft sealing ring 35 . In one embodiment, the pressure regulating device is arranged outside the valve body 1 so as to be easily replaced with different specifications and adapt to different fluid delivery requirements. In one embodiment, the adjusting body 6 and the corresponding valve seat 3 are the same part, and the piston cavity 61 is provided on the corresponding valve seat 3 . In order to simplify the connection structure between the pressure regulating device and the installation groove 32, the integration degree of the ball valve can be improved.

In one embodiment, a support spring 37 is further provided in the installation groove 32 . One end of the support spring 37 is connected to the bottom surface of the installation groove 32 , and the other end of the support spring 37 is connected to the soft sealing ring 35 . The support spring 37 provides elastic force to make the soft sealing ring 35 abut against the valve core 2 . Specifically, the support spring 37 is a coil spring, and the two sections of the support spring 37 are in contact with the bottom surface of the installation groove 32 and the support ring 36 respectively. The support spring 37 provides a certain pressure between the soft sealing ring 35 and the valve core 2, and also has a certain sealing performance when the installation groove 32 is not filled with a pressure-holding medium.

In one embodiment, the valve body 1 is provided with a plurality of flushing ports 12 , and the flushing ports 12 communicate with the central cavity 11 of the valve body 1 . Specifically, the flushing ports 12 are evenly spaced along the circumference of the valve stem 4 . From the flushing port 12, the pressure-holding liquid can be injected into the cavity 11 of the valve body 1 to flush the cavity 11 of the valve body 1 to prevent and reduce particulate matter and self-polymers from remaining in the cavity 11 of the valve body 1, affecting the valve core 2 and the valve. Sealing performance between seat 3.

According to the anti-self-aggregation ball valve in the above-mentioned embodiment, the soft sealing ring 35 is arranged between the two hard sealing parts 31 . When the ball valve is opened and closed, the valve core 2 rotates so that the hard sealing part 31 removes the self-polymer accumulation on the valve core 2 or Fouling can prevent self-polymer accumulation or fouling from causing damage to the soft sealing ring 35, thereby ensuring the sealing performance between the valve core 2 and the valve body 1, and improving the service life of the ball valve.

The above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that the foregoing embodiments can still be used for The recorded technical solutions are modified, or some or all of the technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention, and should be included in the The invention is within the scope of the claims and description.

Claims (9)

1. The utility model provides a prevent from ball valve that gathers, includes valve body, case, disk seat and valve rod, its characterized in that, the interval is equipped with soft sealing ring and two hard sealing portions on the disk seat, two the cooperation of hard sealing portion the spherical surface coaxial setting of case, soft sealing ring sets up two between the hard sealing portion to the cooperation the spherical surface of case with two the coaxial setting of hard sealing portion.

2. The anti-self-aggregation ball valve as recited in claim 1, wherein the valve seat is slidably disposed on the valve body, an outer wall of the valve seat being in sealing connection with an inner wall of the valve body; the valve body is provided with an elastic supporting piece, one end of the elastic supporting piece is connected with the valve body, the other end of the elastic supporting piece is connected with the corresponding valve seat, the elastic supporting piece provides elastic force to enable the corresponding valve seat to slide towards the valve core, and the soft sealing ring and the two hard sealing parts are in sealing butt joint with the valve core.

3. The anti-self-aggregation ball valve as claimed in claim 2, wherein an annular mounting groove is formed in the valve seat, the mounting groove is arranged coaxially with the valve seat, and a notch of the mounting groove is arranged towards the valve core; one end of the soft sealing ring is slidably inserted into the mounting groove through the notch of the mounting groove, the other end of the soft sealing ring is abutted against the valve core, and one end of the soft sealing ring inserted into the mounting groove is hermetically connected with the two inner side walls of the mounting groove; the bottom of the mounting groove and the soft sealing ring form a closed cavity and are connected with a fluid inlet or a fluid outlet at the corresponding end of the valve body.

4. The anti-self-aggregation ball valve as claimed in claim 3, wherein a pressure adjusting device is further arranged between the bottom of the mounting groove and the fluid inlet or the fluid outlet of the corresponding end of the valve body, the pressure adjusting device comprises an adjusting body and a piston, a piston cavity is arranged on the adjusting body, the piston cavity comprises a first cavity and a second cavity which are coaxially arranged, and the first cavity and the second cavity are adjacently arranged; one end of the piston is slidably arranged in the first cavity, the other end of the piston is slidably arranged in the second cavity, and the cross-sectional areas of the first cavity and the second cavity are different; one end of the first cavity, which is far away from the piston, is communicated with the mounting groove, and one end of the second cavity, which is far away from the piston, is communicated with a fluid inlet or a fluid outlet at the corresponding end of the valve body.

5. The anti-self-aggregation ball valve as claimed in claim 4, wherein the adjusting body is arranged on the valve body, a drainage groove is arranged on the outer wall of the valve seat, the notch of the drainage groove is arranged towards the inner wall of the valve body, two sides of the drainage groove extend along the sliding direction of the valve seat, and the groove bottom of the drainage groove is communicated with the mounting groove; a first flow channel and a second flow channel are arranged on the valve body, one end of the first flow channel is communicated with the notch of the drainage groove, and the other end of the first flow channel is communicated with the first cavity; one end of the second flow passage is communicated with the second cavity, and the other end of the second flow passage is communicated with the fluid inlet or the fluid outlet of the corresponding end of the valve body.

6. The anti-self-gathering ball valve as recited in claim 5, wherein the drainage groove is disposed around an outer wall of the valve seat, a plurality of diversion channels are disposed on the valve seat, the diversion channels communicate with the mounting groove and the drainage groove, and the diversion channels are disposed at even intervals along a circumferential direction of the valve seat.

7. The anti-self-aggregation ball valve of claim 3, wherein the adjustment body is the same part as the corresponding valve seat on which the piston chamber is disposed.

8. The anti-self-aggregation ball valve according to any one of claims 3 to 7, wherein a support spring is further disposed in the mounting groove, one end of the support spring is connected to the bottom surface of the mounting groove, the other end of the support spring is connected to the soft sealing ring, and the support spring provides elastic force to make the soft sealing ring abut against the valve core.

9. The anti-self-aggregation ball valve as recited in claim 1, wherein a plurality of flushing ports are provided on the valve body, the flushing ports being in communication with the central cavity of the valve body.

Images