Anti-Self-Polymerization Ball Valve

Abstract

The present invention relates to the field of fluid delivery technology, and discloses an anti-self-aggregation ball valve. The anti-self-aggregation ball valve of the present invention comprises a valve body, a valve core, a valve seat and a valve stem. A soft sealing ring and two hard sealing parts are arranged at intervals on the valve seat. The two hard sealing parts are coaxially arranged with the spherical surface of the valve core. The soft sealing ring is arranged between the two hard sealing parts and is coaxially arranged with the spherical surface of the valve core and the two hard sealing parts. The anti-self-aggregation ball valve of the present invention can reduce the damage to the sealing structure of the valve body and the valve core caused by the accumulation or scaling of self-aggregation, and improve the service life of the ball valve.

Description

Technical Field

[0001] The invention relates to the technical field of fluid transportation, and in particular to an anti-self-aggregation ball valve. Background Art

[0002] Ball valve, or spherical valve, is a kind of throttle valve, named because of its spherical valve core. It is mainly used to cut off, distribute and change the flow direction of liquid in the pipeline. It can be tightly closed by turning 90° and a small torque. It is widely used in various industries such as petroleum, chemical industry, power generation, papermaking, atomic energy, aviation, rockets, and people's daily life.

[0003] The valve body and valve core of a traditional ball valve are generally sealed with sealing rings. The sealing rings are set on the valve seats on both sides of the valve core corresponding to the inlet and outlet of the ball valve. The sealing rings can be soft seals or hard seals. When conveying some media, the sealing part of the valve core is prone to self-polymer accumulation or scaling, which causes the soft sealing ring to be scratched or the hard sealing ring to be worn when the ball valve is opened and closed, resulting in a decrease in sealing performance and a reduction in the service life of the ball valve. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention proposes an anti-self-polymerization ball valve, which can reduce the damage to the sealing structure of the valve body and the valve core caused by the accumulation or scaling of self-polymerization substances, and increase the service life of the ball valve.

[0005] To achieve the above-mentioned purpose, the anti-self-aggregation ball valve of the present invention includes a valve body, a valve core, a valve seat and a valve stem, and a soft sealing ring and two hard sealing parts are arranged on the valve seat at intervals, and the two hard sealing parts are coaxially arranged 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 spherical surface of the valve core and the two hard sealing parts.

[0006] In one of the embodiments, the valve seat is slidably arranged on the valve body, and the outer wall of the valve seat is sealingly connected to the inner wall of the valve body; an elastic support member is provided on the valve body, one end of the elastic support member is connected to the valve body, and the other end of the elastic support member is connected to the corresponding valve seat, and the elastic support member provides elastic force to make the corresponding valve seat slide toward the valve core, and the soft sealing ring and the two hard sealing parts are sealingly abutted against the valve core.

[0007] In one of the embodiments, an annular mounting groove is provided on the valve seat, the mounting groove is coaxially arranged with the valve seat, and the notch of the mounting groove is arranged toward the valve core; one end of the soft sealing ring is slidably inserted into the mounting groove through the notch of the mounting groove, and the other end of the soft sealing ring abuts against the valve core, and one end of the soft sealing ring inserted into the mounting groove is sealedly 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 to the fluid inlet or fluid outlet at the corresponding end of the valve body.

[0008] In one of the embodiments, a pressure regulating device is further provided between the bottom of the mounting groove and the fluid inlet or fluid outlet at the corresponding end of the valve body, and the pressure regulating device includes a regulating body and a piston, and a piston chamber is provided on the regulating body, and the piston chamber includes a first chamber and a second chamber which are coaxially arranged, and the first chamber and the second chamber are arranged adjacent to each other; one end of the piston is slidably arranged in the first chamber, and the other end of the piston is slidably arranged in the second chamber, and the cross-sectional areas of the first chamber and the second chamber are not equal; the end of the first chamber away from the piston is connected to the mounting groove, and the end of the second chamber away from the piston is connected to the fluid inlet or fluid outlet at the corresponding end of the valve body.

[0009] In one embodiment, the regulating body is arranged on the valve body, and a drainage groove is provided on the outer wall of the valve seat, the notch of the drainage groove is arranged toward the inner wall of the valve body, both sides of the drainage groove extend along the sliding direction of the valve seat, and the bottom of the drainage groove is connected with the mounting groove; a first flow channel and a second flow channel are provided on the valve body, one end of the first flow channel is connected with the notch of the drainage groove, and the other end of the first flow channel is connected with the first cavity; one end of the second flow channel is connected with the second cavity, and the other end of the second flow channel is connected with the fluid inlet or fluid outlet at the corresponding end of the valve body.

[0010] In one embodiment, the drainage groove is arranged around the outer wall of the valve seat, and a plurality of diversion channels are provided on the valve seat. The diversion channels connect the installation groove and the drainage groove, and the diversion channels are evenly spaced along the circumference of the valve seat.

[0011] In one embodiment, the regulating body and the corresponding valve seat are the same part, and the piston chamber is arranged on the corresponding valve seat.

[0012] In one of the embodiments, 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, and 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.

[0013] In one of the embodiments, the valve body is provided with a plurality of flushing ports, and the flushing ports are communicated with the middle cavity of the valve body.

[0014] The anti-self-aggregation ball valve in the above embodiment has at least the following advantages:

[0015] (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, preventing the self-polymer accumulation or scaling from damaging the soft sealing ring, thereby ensuring the sealing performance between the valve core and the valve body and prolonging the service life of the ball valve.

[0016] (2) The elastic support member enables the valve seat and the soft sealing ring and the hard sealing part to abut against the valve core in a sealed manner, and can compensate for the wear of the soft sealing ring and the hard sealing part to maintain the sealing performance.

[0017] (3) When in use, a pressure-maintaining medium is injected into the first chamber and the installation groove, and the conveying medium of the ball valve flows into the second chamber. The pressure at both ends of the piston can change proportionally, so that the fluid pressure in the installation groove and the contact pressure between the soft sealing ring and the valve core can increase or decrease synchronously with the pressure of the conveying medium in the ball valve. The sealing performance between the soft sealing ring and the valve core changes accordingly, thereby ensuring the sealing performance while reducing the wear of the soft sealing ring.

[0018] (4) The drainage groove and the first flow channel can keep the first cavity connected to the installation groove when the valve seat slides; the drainage groove is connected to the installation groove through the diversion flow channel, and the evenly arranged drainage grooves can make the soft sealing ring evenly stressed, thereby improving the sealing performance of the soft sealing ring. The support spring creates 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 injected with a pressure-maintaining medium.

[0019] (5) The regulating body and the corresponding valve seat are the same part, which can simplify the connection structure between the pressure regulating device and the mounting groove and improve the integration of the ball valve.

[0020] (6) Pressure-maintaining 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, thereby preventing and reducing the accumulation of particles and self-polymers in the middle cavity of the valve body and affecting the sealing performance between the valve core and the valve seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation of the present invention, the following will briefly introduce the drawings required for use in the specific implementation. In all the drawings, each element or part is not necessarily drawn according to the actual scale.

[0022] Figure 1 A front cross-sectional view of an anti-self-aggregation ball valve provided in one embodiment of the present invention;

[0023] Figure 2 for Figure 1 A enlarged view shown;

[0024] Figure 3 It is a structural schematic diagram of a regulating body and a piston according to another embodiment of the present invention;

[0025] Reference numerals:

[0026] 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 sealing part, 32-installing groove, 33-drainage groove, 34-diverter flow channel, 35-soft sealing ring, 36-support ring, 37-support spring, 4-valve stem, 5-elastic support member, 6-adjusting body, 61-piston cavity, 611-first cavity, 612-second cavity, 7-piston. DETAILED DESCRIPTION

[0027] The embodiments of the technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and the protection scope of the present invention cannot be limited thereto. It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should be the common meanings understood by those skilled in the art to which the present invention belongs.

[0028] In the description of this application, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. "Multiple" means more than two, unless otherwise clearly and specifically defined.

[0029] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] See also Figures 1 to 3 The anti-self-polymerization 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 damage to the sealing structure of the valve body and the valve core caused by the accumulation or scaling of self-polymerization substances, and improve the service life of the ball valve.

[0031] Specifically, the valve body 1, valve core 2, valve seat 3 and valve stem 4 are arranged with reference to the ball valve structure in the prior art. The valve seat 3 is annular and 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 fluid outlet on the valve body. The valve seat 3 seals and connects 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 control the opening and closing of the ball valve.

[0032] A soft sealing ring 35 and two hard sealing parts 31 are arranged at intervals on the valve seat 3. The two hard sealing parts 31 are coaxially arranged in cooperation 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 spherical surface of the valve core 2 and the two hard sealing parts 31. Specifically, the hard sealing part 31 is arranged at one end of the corresponding valve seat 3 close to the valve core 2, and the two hard sealing parts 31 are coaxially arranged radially inside and outside 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 to make the hard sealing part 31 remove the accumulation or scaling of self-polymers on the valve core 2, and prevent the accumulation or scaling of self-polymers from damaging 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.

[0033] In one embodiment, the valve seat 3 is slidably disposed on the valve body 1, and the outer wall of the valve seat 3 is sealedly connected to the inner wall of the valve body 1. An elastic support member 5 is provided on the valve body 1, one end of the elastic support member 5 is connected to the valve body 1, and the other end of the elastic support member 5 is connected to the corresponding valve seat 3. The elastic support member 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 member 5 makes the valve seat 3 and the soft sealing ring 35 and the hard sealing part 31 in sealing contact with the valve core 2, and can compensate the soft sealing ring 35 and the hard sealing part 31 when the soft sealing ring 35 and the hard sealing part 31 are worn, so as to maintain the sealing performance. Specifically, the elastic support member 5 is a coil spring, and the two ends of the coil spring are respectively in contact with the valve seat 3 and the valve body 1. It can be understood that the elastic support member 5 can also be a support member made of elastic material or other elastic member.

[0034] In one embodiment, an annular mounting groove 32 is provided on the valve seat 3, and the mounting groove 32 is coaxially arranged with the valve seat 3, and the notch of the mounting groove 32 is arranged toward the valve core 2. One end of the soft sealing ring 35 is slidably inserted into the mounting groove 32 through the notch of the mounting groove 32, and the other end of the soft sealing ring 35 abuts against the valve core 2. One end of the soft sealing ring 35 inserted into the mounting groove 32 is sealed and connected to the two inner side walls of the mounting groove 32. The bottom of the mounting groove 32 forms a closed cavity with the soft sealing ring 35 and is connected to the fluid inlet or fluid outlet of the corresponding end of the valve body 1. Specifically, the soft sealing ring 35 is made of soft sealing materials such as rubber or plastic. One end of the soft sealing ring 35 inserted into the mounting groove 32 is provided with a support ring 36 made of alloy materials such as stainless steel or copper to improve the structural strength of the soft sealing ring 35. The soft sealing ring 35 can be evenly 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 to the fluid inlet or fluid outlet of the corresponding end of the valve body 1 through a pipeline or other components, so that the pressure of the conveying medium in the fluid inlet or fluid outlet of the corresponding end of the valve body 1 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 relatively large, the contact pressure between the soft sealing ring 35 and the valve core 2 is relatively large, and the sealing performance is enhanced; when the pressure of the conveying medium is relatively small, the contact pressure between the soft sealing ring 35 and the valve core 2 is relatively small, reducing the wear of the soft sealing ring 35, so that the soft sealing ring 35 can have a longer service life.

[0035] In one embodiment, a pressure regulating device is further provided between the bottom of the mounting groove 32 and the fluid inlet or fluid outlet at the corresponding end of the valve body 1. The pressure regulating device includes a regulating body 6 and a piston 7. A piston cavity 61 is provided on the regulating body 6, and the piston cavity 61 includes a first cavity 611 and a second cavity 612 which are coaxially arranged, and the first cavity 611 and the second cavity 612 are arranged adjacent to each other. One end of the piston 7 is slidably arranged in the first cavity 611, and the other end of the piston 7 is slidably arranged in the second cavity 612, and the cross-sectional areas of the first cavity 611 and the second cavity 612 are different. The end of the first cavity 611 away from the piston 7 is connected to the mounting groove 32, and the end of the second cavity 612 away from the piston 7 is connected to the fluid inlet or fluid outlet at the corresponding end of the valve body 1. Specifically, the piston 7 is composed of two sections with different diameters, and the two sections of the smaller diameter section 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 both directions in the piston cavity 61. The cavity formed at the connection between the piston 7 and the first cavity 611 and the second cavity 612 can be filled with a proper amount of gas or connected to the atmosphere. To facilitate the sliding of the piston 7. When in use, a pressure-maintaining medium is injected into the first chamber 611 and the installation groove 32, and the conveying medium of the ball valve flows into the second chamber 612. The pressure at both ends of the piston 7 can change proportionally, so that the fluid pressure in the installation groove 32 and the contact pressure between the soft sealing ring 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 accordingly, thereby reducing the wear of the soft sealing ring 35 while ensuring the sealing performance. The cross-sectional areas of the first chamber 611 and the second chamber 612 are not equal. The piston 7 enlarges or reduces the internal pressure of the second chamber 612 and transmits it to the first chamber 611 accordingly to meet different fluid conveying requirements.

[0036] In one embodiment, the regulating body 6 is arranged on the valve body 1. A drainage groove 33 is arranged on the outer wall of the valve seat 3, and the notch of the drainage groove 33 is arranged toward the inner wall of the valve body 1. Both sides of the drainage groove 33 extend along the sliding direction of the valve seat 3, and the groove bottom of the drainage groove 33 is connected with the mounting groove 32. A first flow channel 13 and a second flow channel 14 are arranged on the valve body 1. One end of the first flow channel 13 is connected with the notch of the drainage groove 33, and the other end of the first flow channel 13 is connected with the first cavity 611. One end of the second flow channel 14 is connected with the second cavity 612, and the other end of the second flow channel 14 is connected with the fluid inlet or 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. A plurality of diversion channels 34 are arranged on the valve seat 3, and the diversion channels 34 are connected with the mounting groove 32 and the drainage groove 33. The diversion channels 34 are evenly spaced along the circumference of the valve seat 3. The drainage groove 33 and the first flow channel 13 can keep the first cavity 611 connected with the mounting groove 32 when the valve seat 3 slides; the drainage groove 33 is connected with the mounting groove 32 through the diversion flow channel 34, and the evenly arranged drainage grooves 33 enable the soft sealing ring 35 to be evenly 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 to facilitate replacement of different specifications to meet different fluid delivery requirements. In one embodiment, the regulating body 6 and the corresponding valve seat 3 are the same part, and the piston cavity 61 is arranged on the corresponding valve seat 3. This can simplify the connection structure between the pressure regulating device and the mounting groove 32 and improve the integration of the ball valve.

[0037] In one embodiment, a support spring 37 is further provided in the mounting groove 32. One end of the support spring 37 is connected to the bottom surface of the mounting 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 abut against the bottom surface of the mounting groove 32 and the support ring 36 respectively. The support spring 37 creates a certain pressure between the soft sealing ring 35 and the valve core 2, and also has a certain sealing performance when the mounting groove 32 is not injected with a pressure-maintaining medium.

[0038] In one embodiment, the valve body 1 is provided with a plurality of flushing ports 12, which are connected to the middle cavity 11 of the valve body 1. Specifically, the flushing ports 12 are evenly spaced along the circumference of the valve stem 4. Pressure-maintaining liquid can be injected into the middle cavity 11 of the valve body 1 through the flushing ports 12 to flush the middle cavity 11 of the valve body 1, thereby preventing and reducing particles and self-polymers from being retained in the middle cavity 11 of the valve body 1 and affecting the sealing performance between the valve core 2 and the valve seat 3.

[0039] According to the anti-self-polymerization ball valve in the above 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 to allow the hard sealing part 31 to remove the self-polymerization accumulation or scaling on the valve core 2, thereby preventing the self-polymerization accumulation or scaling from damaging 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.

[0040] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. An anti-self-aggregation ball valve, comprising a valve body, a valve core, a valve seat and a valve stem, characterized in that: The valve seat is provided with a soft sealing ring and two hard sealing parts at intervals, the two hard sealing parts are coaxially arranged with the spherical surface of the valve core, the soft sealing ring is arranged between the two hard sealing parts, and is coaxially arranged with the spherical surface of the valve core and the two hard sealing parts; The valve seat is slidably arranged on the valve body, and the outer wall of the valve seat is sealed and connected to the inner wall of the valve body; an elastic support member is arranged on the valve body, one end of the elastic support member is connected to the valve body, and the other end of the elastic support member is connected to the corresponding valve seat, and the elastic support member provides elastic force to make the corresponding valve seat slide toward the valve core, and the soft sealing ring and the two hard sealing parts are in sealing contact with the valve core; The valve seat is provided with an annular mounting groove, the mounting groove is coaxially arranged with the valve seat, and the notch of the mounting groove is arranged toward the valve core; one end of the soft sealing ring passes through the notch of the mounting groove and is slidably inserted into the mounting groove, the other end of the soft sealing ring abuts against the valve core, and one end of the soft sealing ring inserted into the mounting groove is sealed and connected with 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 the fluid inlet or fluid outlet at the corresponding end of the valve body; A pressure regulating device is also provided between the bottom of the installation groove and the fluid inlet or fluid outlet at the corresponding end of the valve body, and the pressure regulating device includes a regulating body and a piston. The regulating body is provided with a piston chamber, and the piston chamber includes a first chamber and a second chamber that are coaxially arranged, and the first chamber and the second chamber are arranged adjacent to each other; one end of the piston is slidably arranged in the first chamber, and the other end of the piston is slidably arranged in the second chamber, and the cross-sectional areas of the first chamber and the second chamber are different; one end of the first chamber away from the piston is communicated with the installation groove, and one end of the second chamber away from the piston is communicated with the fluid inlet or fluid outlet at the corresponding end of the valve body; The regulating body is arranged on the valve body, and a drainage groove is provided on the outer wall of the valve seat, and the notch of the drainage groove is arranged toward the inner wall of the valve body, and both sides of the drainage groove extend along the sliding direction of the valve seat, and the bottom of the drainage groove is connected with the mounting groove; a first flow channel and a second flow channel are provided on the valve body, one end of the first flow channel is connected with the notch of the drainage groove, and the other end of the first flow channel is connected with the first cavity; one end of the second flow channel is connected with the second cavity, and the other end of the second flow channel is connected with the fluid inlet or fluid outlet at the corresponding end of the valve body.

2. The anti-self-aggregation ball valve according to claim 1, characterized in that: The drainage groove is arranged around the outer wall of the valve seat. The valve seat is provided with a plurality of diversion channels, which communicate with the mounting groove and the drainage groove. The diversion channels are evenly spaced along the circumference of the valve seat.

3. The anti-self-aggregation ball valve according to claim 1, characterized in that: The regulating body and the corresponding valve seat are the same part, and the piston chamber is arranged on the corresponding valve seat.

4. The anti-self-aggregation ball valve according to any one of claims 1 to 3, characterized in that: A support spring is also provided in the installation groove, one end of the support spring is connected to the bottom surface of the installation groove, and the other end of the support spring is connected to the soft sealing ring. The support spring provides elastic force to make the soft sealing ring abut against the valve core.

5. The anti-self-aggregation ball valve according to claim 1, characterized in that: The valve body is provided with a plurality of flushing ports, and the flushing ports are communicated with the middle cavity of the valve body.

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