A frictionless regulating valve with pressure-inducing function and use method thereof

Abstract

1. The operative position of the operative position of the camshaft is higher than that of the camshaft, and the operative position of the camshaft is higher than that of the camshaft. The operative position of the camshaft is higher than that of the camshaft. The operative position of the camshaft is higher than that of the camshaft.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, and in particular to a frictionless regulating valve with a pressure-inducing function and a use method thereof. Background Art

[0002] With the development of modern industrial technology, various high temperature, high pressure, high pressure difference and strong erosion conditions are increasingly appearing in the field of fluid control. In addition, for the purpose of safety, economy and environmental protection, there are increasingly stringent requirements for valve leakage. Traditional cut-off valves such as gate valves, stop valves and plug valves are increasingly difficult to meet these diverse and complex requirements. As the fastest growing valve type in recent decades, ball valves mainly consist of valve body, valve seat, ball, valve stem and seals. Its working principle is that the valve seat and the ball are sealed, and the ball is driven to rotate through the valve stem to achieve the function of opening and closing. Because of its small fluid resistance, simple structure, tight and reliable, easy operation, rapid opening and closing, valve sealing surface is not eroded by the medium, and easy maintenance, it is widely used in petroleum, chemical, metallurgy and other industries.

[0003] However, the application of traditional ball valves is limited under high temperature, strong erosion and high pressure conditions. Metal hard-sealed ball valves have disadvantages such as large opening and closing torque, severe wear of the sealing surface and valve seat, and difficulty in ensuring sealing.

[0004] Specifically, since the spring force and the medium unbalanced force always exist, the valve seat and the valve ball are always in contact, which will inevitably lead to the following usage problems:

[0005] 1. It is difficult to eliminate the concentricity problem of the ball during the rotation of the ball valve. During the adjustment process, the cam effect of the ball rotation is likely to produce a wedging force with the valve seat, causing the valve to get stuck;

[0006] 2. After long-term use, the valve seat and valve ball are always in contact, the sealing surface is worn and the sealing surface is bonded, resulting in poor sealing and rotation of the valve;

[0007] 3. Since there is always spring force and medium unbalanced force when the valve ball and valve seat rotate, the valve needs to overcome the rotational friction torque during rotation, and the valve torque increases. Summary of the invention

[0008] The object of the present invention is to provide a frictionless regulating valve with a pressure-inducing function and a method for using the same.

[0009] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention is: a frictionless regulating valve with a pressure-inducing function, comprising a valve body, a valve seat, a valve ball, a valve stem and a pressure-inducing structure, wherein a pressure chamber is formed on the valve seat; the inner cavity of the valve body is provided with a flow channel for medium circulation, the bottom end of the valve stem passes through the valve body and extends into the flow channel and is connected to the valve ball setting, and the valve stem drives the valve ball to rise and fall and rotate; the valve seat is installed in the flow channel, and the flow channel is divided into a pre-valve channel and a post-valve channel; a first flow channel and a second flow channel are opened on the valve body, the first flow channel is connected to the pre-valve channel setting, and the second flow channel is connected to the pressure chamber setting; a circulation channel is formed between the inner wall of the valve seat and the stem of the valve stem, and the first circulation channel and the second circulation channel are connected through the circulation channel; the pressure chamber, the first circulation channel, the second circulation channel and the circulation channel form the pressure-inducing structure.

[0010] Wherein, the first circulation channel is located above the second circulation channel.

[0011] Preferably, the valve seat is arranged between the valve ball and the front passage of the valve, one side of the valve seat is adapted to fit with the valve ball to form an inwardly concave adaptation surface, and the other side cooperates with the valve seat; a plurality of through holes are opened on the valve seat for the circulation of the medium; a spring is arranged between the valve seat and the valve body, and the two ends of the spring are respectively arranged against the valve seat and the valve body.

[0012] The spring continuously applies a force to the valve seat to ensure that the valve seat can be pushed toward the valve ball, thereby ensuring the seal between the valve seat and the valve ball.

[0013] Preferably, the valve stem side wall is circumferentially protruded to form a matching portion, and the matching portion is arranged corresponding to the first circulation channel and the second circulation channel; the lifting and lowering of the valve stem drives the lifting and lowering of the matching portion to realize the opening and closing of the pressure-inducing structure.

[0014] Among them, a limiting part adapted to the shape of the matching part is also formed in the valve body to ensure that the matching part is not easy to fall off when matched with the limiting part; the cross-sectional shape of the matching part is circular, and the force is evenly applied when subjected to force, thereby improving the stability of the valve ball and the valve stem during use.

[0015] A sealing ring is provided on one side of the second circulation channel to increase the sealing effect; the matching part seals the second circulation channel to achieve the separation between the first circulation channel and the second circulation channel, thereby achieving the closure of the pressure-inducing structure.

[0016] Preferably, the matching portion is configured to be wide at the top and narrow at the bottom, with the side wall forming a conical structure; when subjected to force, the force is evenly applied, thereby improving the stability of the valve ball and the valve stem during use.

[0017] Preferably, the adaptable surface and the valve ball fitting portion are overlapping surfaces, the adaptable surface and the valve ball non-fitting portion are valve front pressure-bearing surfaces, and the inner wall of the pressure chamber is a reverse pressure-bearing surface.

[0018] Preferably, the area of ​​the pressure-bearing surface in front of the valve is smaller than the area of ​​the reverse pressure-bearing surface; more preferably, the area of ​​the reverse pressure-bearing surface is twice the area of ​​the pressure-bearing surface in front of the valve.

[0019] Preferably, a guide groove is provided at the bottom of the valve ball, and a guide column is provided at the inner bottom of the corresponding valve body, and the guide column is inserted into the guide groove; the diameter width of the guide column is smaller than the guide groove.

[0020] Among them, a rotating lifting groove is opened on the valve stem, and a contact point is formed in the corresponding valve body corresponding to the rotating lifting groove; when the valve stem rotates, the valve stem will be lifted and lowered by the cooperation between the contact point and the rotating lifting groove as support.

[0021] The present invention also claims a method for using a frictionless regulating valve with a pressure-inducing function, comprising:

[0022] A frictionless regulating valve comprises a valve body, a valve seat, a valve ball, a valve stem and a pressure-inducing structure, wherein a pressure chamber is formed on the valve seat; an inner chamber of the valve body is provided with a flow channel for medium circulation, the bottom end of the valve stem passes through the valve body and extends into the flow channel and is connected to the valve ball, and the valve stem drives the valve ball to rise and fall and rotate; the valve seat is installed in the flow channel and divides the flow channel into a pre-valve channel and a post-valve channel; a first circulation channel and a second circulation channel are provided on the valve body, the first circulation channel is connected to the pre-valve channel, and the second circulation channel is connected to the pressure chamber; a circulation channel is formed between the inner wall of the valve seat and the stem of the valve stem, and the first circulation channel and the second circulation channel are connected through the circulation channel; the pressure chamber, the first circulation channel, the second circulation channel and the circulation channel form the pressure-inducing structure;

[0023] Steps:

[0024] Step 1: The matching part of the valve stem separates the first flow channel and the second flow channel, so that the pressure chamber is separated from the valve front channel; the valve seat is pressed against the valve ball by the spring force and the unbalanced force of the medium to achieve sealing;

[0025] Step 2: The valve stem drives the fitting part to move upward, and the first circulation channel and the second circulation channel are connected through the circulation channel, that is, the pressure chamber and the pre-valve channel are connected; the medium circulates, and part of the medium is led from the pre-valve channel to the pressure chamber, providing a reverse unbalanced force to the valve seat, and the valve seat and the valve ball are separated;

[0026] Step 3: The valve stem drives the valve ball to rotate, so that the valve is in the open state; the medium continues to flow, and the pressure difference in the valve seat pressure chamber continues to be maintained, which always provides a reverse unbalanced force to the valve seat, and the valve seat and valve ball remain separated.

[0027] Wherein, the first circulation channel is located above the second circulation channel.

[0028] Preferably, the valve seat is arranged between the valve ball and the front passage of the valve, one side of the valve seat is adapted to fit with the valve ball to form an inwardly concave adaptation surface, and the other side cooperates with the valve seat; a plurality of through holes are opened on the valve seat for the circulation of the medium; a spring is arranged between the valve seat and the valve body, and the two ends of the spring are respectively arranged against the valve seat and the valve body.

[0029] The spring continuously applies a force to the valve seat to ensure that the valve seat can be pushed toward the valve ball, thereby ensuring the seal between the valve seat and the valve ball.

[0030] Preferably, the valve stem side wall is circumferentially protruded to form a matching portion, and the matching portion is arranged corresponding to the first circulation channel and the second circulation channel; the lifting and lowering of the valve stem drives the lifting and lowering of the matching portion to realize the opening and closing of the pressure-inducing structure.

[0031] Among them, a limiting part adapted to the shape of the matching part is also formed in the valve body to ensure that the matching part is not easy to fall off when matched with the limiting part; the cross-sectional shape of the matching part is circular, and the force is evenly applied when subjected to force, thereby improving the stability of the valve ball and the valve stem during use.

[0032] A sealing ring is provided on one side of the second circulation channel to increase the sealing effect; the matching part seals the second circulation channel to achieve the separation between the first circulation channel and the second circulation channel, thereby achieving the closure of the pressure-inducing structure.

[0033] Preferably, the matching portion is configured to be wide at the top and narrow at the bottom, with the side wall forming a conical structure; when subjected to force, the force is evenly applied, thereby improving the stability of the valve ball and the valve stem during use.

[0034] Preferably, the adaptable surface and the valve ball fitting portion are overlapping surfaces, the adaptable surface and the valve ball non-fitting portion are valve front pressure-bearing surfaces, and the inner wall of the pressure chamber is a reverse pressure-bearing surface.

[0035] Preferably, the area of ​​the pressure-bearing surface in front of the valve is smaller than the area of ​​the reverse pressure-bearing surface; more preferably, the area of ​​the reverse pressure-bearing surface is twice the area of ​​the pressure-bearing surface in front of the valve.

[0036] Preferably, a guide groove is provided at the bottom of the valve ball, and a guide column is provided at the inner bottom of the corresponding valve body, and the guide column is inserted into the guide groove; the diameter width of the guide column is smaller than the guide groove.

[0037] Among them, a rotating lifting groove is opened on the valve stem, and a contact point is formed in the corresponding valve body corresponding to the rotating lifting groove; when the valve stem rotates, the valve stem will be lifted and lowered by the cooperation between the contact point and the rotating lifting groove as support.

[0038] Preferably, it also includes step 4, the valve stem drives the valve ball to rotate, so that the valve is in a closed state, the first circulation channel and the second circulation channel are connected through the circulation channel, that is, the pressure chamber and the pre-valve channel are connected; the medium circulates, and part of the medium is led from the pre-valve channel to the pressure chamber, providing a reverse unbalanced force on the valve seat, and the valve seat and the valve ball are separated.

[0039] Preferably, the method further includes: step 5, the valve stem drives the fitting part to move downward to block the first flow channel and the second flow channel, so that the pressure chamber is isolated from the pre-valve channel; the valve seat is pressed against the valve ball by the spring force to achieve sealing.

[0040] Preferably, step 2 and step 3 are performed simultaneously.

[0041] Preferably, step 4 and step 5 are performed simultaneously.

[0042] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0043] 1. The present invention discloses a frictionless regulating valve with a pressure-inducing function and a method for using the same, which allows the valve seat and the valve ball to be completely separated at the moment of opening, thereby not only reducing the switching torque of the valve, but also solving the problem of the valve ball being stuck with the valve seat due to the eccentric rotation of the valve ball, thereby reducing the friction torque during the regulating process;

[0044] 2. The present invention discloses a frictionless regulating valve with a pressure-inducing function and a method for using the same. When the pressure-inducing structure is opened, the pressure chamber provides a reverse unbalanced force to the valve seat, separating the valve seat from the valve ball, avoiding the valve seat and the valve ball from always being in contact, thereby reducing friction. When the pressure-inducing structure is closed, the pressure chamber is independent, and the spring continuously applies a force to the valve seat to ensure that the valve seat can be pushed toward the valve ball, thereby ensuring the seal between the valve seat and the valve ball.

[0045] 3. The present invention discloses a frictionless regulating valve with a pressure-inducing function and a method of using the same. The valve has low friction on the sealing surface during opening and closing, is easy to open and close, and has reliable sealing performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a structural schematic diagram of the valve and the pressure-inducing structure of the present invention when both are in an open state;

[0047] Figure 2 It is a structural schematic diagram of the valve of the present invention when it is in a closed state and the pressure-inducing structure is in an open state;

[0048] Figure 3 The schematic diagram of the partial structure of the present invention when the valve is in a closed state and the pressure-inducing structure is in an open state Figure 1 ;

[0049] Figure 4 The schematic diagram of the partial structure of the present invention when the valve is in a closed state and the pressure-inducing structure is in an open state Figure 2 ;

[0050] Figure 5 It is a structural schematic diagram of the valve and the pressure-inducing structure of the present invention when both are closed.

[0051] Among them: 1. Valve body; 2. Valve seat; 3. Valve ball; 4. Valve stem; 5. Pressure chamber; 6. First circulation channel; 7. Second circulation channel; 8. Valve front channel; 9. Circulation channel; 10. Matching part; 11. Valve front pressure surface; 12. Reverse pressure surface; 13. Spring; 14. Guide column; 15. Guide groove; 16. Rotating lifting groove; 17. Contact. DETAILED DESCRIPTION

[0052] In order to more clearly understand the above-mentioned purposes, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the structures related to the present invention. It should be noted that the embodiments in this application and the features in the embodiments can be combined with each other without conflict.

[0053] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0054] Example 1

[0055] Please refer to Figure 1-Figure 5 This embodiment mainly introduces a frictionless regulating valve with a pressure-inducing function, including a pressure-inducing structure, a valve body 1, a valve seat 2, a valve ball 3 and a valve stem 4; a pressure chamber 5 is formed on the top of the valve seat 2.

[0056] The inner cavity of the valve body 1 is provided with a flow channel for medium circulation, the bottom end of the valve stem 4 passes through the valve body 1 and extends into the flow channel and is connected to the valve ball 3, and the valve stem 4 drives the valve ball 3 to rise and fall and rotate; the valve seat 2 is installed in the flow channel, and the flow channel is divided into a pre-valve channel 8 and a post-valve channel; the valve body 1 is provided with a first circulation channel 6 and a second circulation channel 7, the first circulation channel 6 is connected to the pre-valve channel 8, and the second circulation channel 7 is connected to the pressure chamber 5; a circulation channel 9 is formed between the inner wall of the valve seat 2 and the rod part of the valve stem 4, and the first circulation channel 6 and the second circulation channel 7 are connected through the circulation channel 9.

[0057] The pressure chamber 5, the first circulation channel 6, the second circulation channel 7 and the circulation channel 9 form the pressure-inducing structure.

[0058] The side wall of the valve stem 4 is circumferentially protruded to form a matching portion 10, and the matching portion 10 is arranged corresponding to the first circulation channel 6 and the second circulation channel 7; the lifting and lowering of the valve stem 4 drives the lifting and lowering of the matching portion 10 to achieve the connection and isolation of the circulation channel 9 with the first circulation channel 6 and the second circulation channel 7.

[0059] The matching portion 10 is wide at the top and narrow at the bottom to form a conical structure. Correspondingly, a limiting portion adapted to the shape of the matching portion 10 is also formed in the valve body 1 to ensure that the matching portion 10 is not easy to fall off when matched with the limiting portion; the cross-sectional shape of the matching portion 10 is circular, and the force is evenly applied when subjected to force, thereby improving the stability of the valve ball 3 and the valve stem 4 during use.

[0060] A guide groove 15 is formed at the bottom of the valve ball 3 , and a guide column 14 is formed at the bottom of the valve body 1 . The guide column 14 is inserted into the guide groove 15 . The diameter of the guide column 14 is smaller than that of the guide groove 15 .

[0061] The valve seat 2 is arranged between the valve ball 3 and the pre-valve channel 8. One side of the valve seat 2 fits with the valve ball 3 to form a concave adaptation surface, and the other side cooperates with the valve seat 2. A spring 13 is arranged between the valve seat 2 and the valve body 1. The two ends of the spring 13 are respectively set against the valve seat 2 and the valve body 1. The spring 13 continuously applies a force to the valve seat 2 to ensure that the valve seat 2 can be pushed toward the valve ball 3 to ensure the seal between the valve seat 2 and the valve ball 3.

[0062] The part where the adapting surface fits the valve ball 3 is a superimposed surface for medium circulation; the part where the adapting surface does not fit the valve ball 3 is a valve front pressure surface 11 , and the inner wall of the pressure chamber 5 is a reverse pressure surface 12 .

[0063] When there is no flow between the pre-valve channel 8 and the post-valve channel, the medium continuously exerts an unbalanced force on the pre-valve channel 8 and the valve seat 2, pushing the valve seat 2 toward the valve ball 3. The valve seat 2 is pressed against the valve ball 3 by the force of the spring 13 and the unbalanced force of the medium to achieve sealing.

[0064] When the medium flows between the pre-valve channel 8 and the post-valve channel, the medium flows continuously, the medium flows at the overlapping surface of the valve seat 2, and the pressure surface of the valve seat 2 receives an unbalanced force from the medium. At this time, the valve seat 2 is pushed toward the valve ball 3 by the force of the spring 13 and the unbalanced force of the medium. If the valve seat 2 and the valve ball 3 are always in contact, over a long period of time, it will cause wear and adhesion between the valve seat 2 and the valve ball 3, which will cause the valve to be poorly sealed and the valve ball 3 to rotate and become stuck.

[0065] The pre-valve channel 8 is connected to the pressure chamber 5 through a flow channel, a second flow channel 7 and a circulation channel 9; after the medium is guided into the pressure chamber 5, it can provide a reverse unbalanced force to the valve seat 2 to separate the valve seat 2 from the valve ball 3.

[0066] The area of ​​the valve front pressure-bearing surface 11 is smaller than the area of ​​the reverse pressure-bearing surface 12, ensuring that the reverse unbalanced force is not smaller than the medium unbalanced force.

[0067] Example 2

[0068] This embodiment only introduces a method for using a frictionless regulating valve with a pressure-inducing function, including the following steps:

[0069] Step 1: The matching portion 10 of the valve stem 4 blocks the first flow channel 6 and the second flow channel 7, so that the pressure chamber 5 is separated from the pre-valve channel 8; the valve seat 2 is pressed against the valve ball 3 by the force of the spring 13 and the unbalanced force of the medium to achieve sealing.

[0070] At this time, the pressure chamber 5 is independent and not connected to the outside world; the structure and principle of this valve are similar to those of an ordinary ball valve, and the valve seat 2 is pressed against the valve ball 3 by the force of the spring 13 and the unbalanced force of the medium to achieve sealing.

[0071] Step 2, the valve stem 4 drives the fitting part 10 to move upward, and the first circulation channel 6 and the second circulation channel 7 are connected through the circulation channel 9, that is, the pressure chamber 5 and the pre-valve channel 8 are connected; the medium circulates, and part of the medium is led from the pre-valve channel 8 to the pressure chamber 5, providing a reverse unbalanced force to the valve seat 2, and the valve seat 2 and the valve ball 3 are separated.

[0072] Step 3: The valve stem 4 drives the valve ball 3 to rotate, so that the valve is in an open state; the medium continues to flow, and the pressure difference is still maintained in the pressure chamber 5 of the valve seat 2, which always provides a reverse unbalanced force to the valve seat 2, and the valve seat 2 and the valve ball 3 remain separated.

[0073] Wherein, step 2 and step 3 are performed simultaneously.

[0074] Step 4, the valve stem 4 drives the valve ball 3 to rotate, so that the valve is in a closed state, and the first circulation channel 6 and the second circulation channel 7 are connected through the circulation channel 9, that is, the pressure chamber 5 and the pre-valve channel 8 are connected; the medium circulates, and part of the medium is led from the pre-valve channel 8 to the pressure chamber 5, providing a reverse unbalanced force to the valve seat 2, and the valve seat 2 and the valve ball 3 are separated.

[0075] Step 5: The valve stem 4 drives the fitting part 10 to move downward, blocking the first circulation channel 6 and the second circulation channel 7, so that the pressure chamber 5 is isolated from the pre-valve channel 8; the valve seat 2 is pressed against the valve ball 3 by the spring 13 to achieve sealing.

[0076] Wherein, step 4 and step 5 are performed simultaneously.

[0077] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood by specific circumstances.

[0078] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to the above embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the above embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A frictionless regulating valve with pressure-guiding function. It is characterized in that The valve comprises a valve body (1), a valve seat (2), a valve ball (3), a valve stem (4) and a pressure-inducing structure, wherein a pressure chamber (5) is formed on the valve seat (2); an inner chamber of the valve body (1) is provided with a flow channel for medium to flow, a bottom end of the valve stem (4) passes through the valve body (1) and extends into the flow channel and is connected to the valve ball (3); the valve stem (4) drives the valve ball (3) to rise and fall and rotate; The valve seat (2) is installed in the flow channel and divides the flow channel into a valve front channel (8) and a valve rear channel; the valve body (1) is provided with a first circulation channel (6) and a second circulation channel (7), the first circulation channel (6) is connected to the valve front channel (8), and the second circulation channel (7) is connected to the pressure chamber (5); a circulation channel (9) is formed between the inner wall of the valve seat (2) and the stem of the valve stem (4), and the first circulation channel (6) and the second circulation channel (7) are connected via the circulation channel (9); The pressure chamber (5), the first circulation channel (6), the second circulation channel (7) and the circulation channel (9) form the pressure-inducing structure.

2. A frictionless regulating valve with pressure-guiding function as claimed in claim 1, It is characterized in that The valve seat (2) is arranged between the valve ball (3) and the valve front passage (8); one side of the valve seat (2) is adapted to fit with the valve ball (3) to form an inwardly concave adaptation surface, and the other side is adapted to fit with the valve seat (2); a plurality of through holes are provided on the valve seat (2) for medium circulation; a spring (13) is provided between the valve seat (2) and the valve body (1), and two ends of the spring (13) are respectively arranged to abut against the valve seat (2) and the valve body (1).

3. A frictionless regulating valve with pressure-guiding function as claimed in claim 2, It is characterized in that The side wall of the valve stem (4) protrudes along the circumferential direction to form a matching portion (10), and the matching portion (10) is arranged corresponding to the first circulation channel (6) and the second circulation channel (7); the valve stem (4) is raised and lowered to drive the matching portion (10) to rise and fall, so as to realize the opening and closing of the pressure-inducing structure.

4. A frictionless regulating valve with pressure-guiding function as claimed in claim 3, It is characterized in that The matching portion (10) is arranged to be wide at the top and narrow at the bottom, and the side wall forms a conical structure.

5. A frictionless regulating valve with pressure-guiding function as claimed in claim 3, It is characterized in that The portion where the adapting surface and the valve ball (3) fit together is a superimposed surface, the portion where the adapting surface and the valve ball (3) do not fit together is a valve front pressure-bearing surface (11), and the inner wall of the pressure chamber (5) is a reverse pressure-bearing surface (12).

6. A frictionless regulating valve with pressure-guiding function as claimed in claim 5, It is characterized in that The area of ​​the valve front pressure-bearing surface (11) is smaller than the area of ​​the reverse pressure-bearing surface (12).

7. A frictionless regulating valve with pressure-guiding function as claimed in claim 3, It is characterized in that The bottom of the valve ball (3) is provided with a guide groove (15), and the bottom of the valve body (1) is provided with a guide column (14) correspondingly, and the guide column (14) is inserted into the guide groove (15); the diameter of the guide column (14) is smaller than that of the guide groove (15).

8. A method for using the frictionless regulating valve with pressure-guiding function as claimed in any one of claims 3 to 7, It is characterized in that The following steps are included: Step 1: The matching part of the valve stem separates the first flow channel and the second flow channel, so that the pressure chamber is separated from the valve front channel; the valve seat is pressed against the valve ball by the spring force and the unbalanced force of the medium to achieve sealing; Step 2: The valve stem drives the fitting part to move upward, and the first circulation channel and the second circulation channel are connected through the circulation channel, that is, the pressure chamber and the pre-valve channel are connected; the medium circulates, and part of the medium is led from the pre-valve channel to the pressure chamber, providing a reverse unbalanced force to the valve seat, and the valve seat and the valve ball are separated; Step 3: The valve stem drives the valve ball to rotate, so that the valve is in the open state; the medium continues to flow, and the pressure difference in the valve seat pressure chamber continues to be maintained, which always provides a reverse unbalanced force to the valve seat, and the valve seat and valve ball remain separated.

9. A method for using a frictionless regulating valve with a pressure-guiding function as claimed in claim 8, It is characterized in that Also includes, Step 4: The valve stem drives the valve ball to rotate, so that the valve is in a closed state. The first circulation channel and the second circulation channel are connected through the circulation channel, that is, the pressure chamber and the pre-valve channel are connected; the medium circulates, and part of the medium is led from the pre-valve channel to the pressure chamber, providing a reverse unbalanced force on the valve seat, and the valve seat and the valve ball are separated.

10. A method for using a frictionless regulating valve with a pressure-guiding function as claimed in claim 9, It is characterized in that It also includes step 5, the valve stem drives the matching part to move downward, separating the first flow channel and the second flow channel, so that the pressure chamber is separated from the pre-valve channel; the valve seat is pressed against the valve ball by the spring force to achieve sealing.

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