A ball valve with low torque and zero leakage function

Abstract

The present application discloses a ball valve with small torque and zero leakage function, relating to the technical field of ball valves, comprising a valve seat with a built-in liquid tank, a large ball valve body and a small ball valve body sleeved in the large ball valve body, both of which are bidirectionally conductive, and the conductive part of the small ball valve body is set as an angular opening, the large ball valve body is rotatably arranged in the liquid tank, and the rotation center of the large ball valve body passes through the liquid tank and is connected to a second valve stem, a first valve stem connected to the small ball valve body is rotatably sleeved in the second valve stem, and a limiting structure is provided between the first valve stem and the second valve stem. The technical advantage of the application is: in order to achieve zero leakage, a large ball valve body is sleeved on the outside of the small ball valve body, and the large ball valve body is preset to a fully open state, so that the fluid passing through the valve seat cannot flush the first sealing gasket of the large ball core, and at the same time, during assembly, the wave spring gives the large ball valve body a larger pre-tightening force to the first sealing gasket matched with it, so that the large ball valve body is held more tightly by the first sealing gaskets on both sides, and it has a very good sealing state.

Description

Technical Field

[0001] The present application relates to the technical field of ball valves, and in particular to a ball valve with low torque and zero leakage functions. Background Art

[0002] With the accelerating pace of urbanization, centralized heating systems have become an indispensable infrastructure for urban life and industrial production. Within the entire heating system, heating pipelines, as the key channels for heat transmission, shoulder the important task of efficiently and stably delivering heat energy generated by the heat source to various user terminals. Heating pipelines operate under complex conditions, not only enduring high temperatures and high pressures, but also facing the long-term impact of varying water quality and heat transfer media. In this context, the performance of valves in heating pipelines is particularly important. Ball valves, commonly used as shut-off valves in heating pipelines, perform the critical functions of opening, closing, and regulating flow. They control the flow of media through the rotation of a ball and offer advantages such as a simple structure, easy operation, and excellent sealing performance. When heating pipelines require inspection and maintenance, or when adjusting the heat flow according to user needs, ball valves can quickly and efficiently perform these operations, ensuring the normal operation of the heating system.

[0003] However, existing ball valves suffer from significant practical drawbacks. During the dynamic valve operation, the ball's seal is exposed to a fluid with a constant velocity and pressure. This high-temperature heating fluid carries impurities and particles. This constant erosion, day after day and year after year, causes severe wear and erosion on the sealing surfaces where the seal and ball fit tightly together. Over time, the once tightly fitting sealing surfaces become uneven and scarred, significantly compromising the sealing effectiveness between the seal and ball. This makes it difficult to maintain an ideal, perfect seal. Consequently, fluid leakage occurs between the ball and seal. When the valve needs to be completely closed to cut off fluid flow, strictly zero leakage cannot be achieved. This not only wastes energy but also poses potential risks and hazards to the stable operation of the heating system and the surrounding environment. Summary of the Invention

[0004] This device provides a ball valve with low torque and zero leakage function. The specific implementation is as follows:

[0005] A ball valve with low torque and zero leakage function, comprising:

[0006] Valve seat with built-in liquid groove;

[0007] The large ball valve body and the small ball valve body sleeved in the large ball valve body are both bidirectionally conductive, and the conductive portion of the small ball valve body is configured as an angular opening;

[0008] The large ball valve body is rotatably arranged in the liquid tank, and the rotation center of the large ball valve body passes through the liquid tank and is connected to the second valve stem. The first valve stem connected to the small ball valve body is rotatably sleeved in the second valve stem. A limiting structure for controlling the relative rotation angle is provided between the first valve stem and the second valve stem. The opening of the valve is adjusted by rotating the small ball valve body, and the start and stop of the valve are realized by rotating the large ball valve body.

[0009] Based on the above technical solution, in order to fundamentally solve the problem of fluid leakage, a design scheme of a double-ball valve body structure is proposed. A large ball valve body is connected to the outside of the original small ball valve body. This large ball valve body is preset to be in a fully open state throughout the entire operation process; so that the fluid flowing through the inside of the valve seat cannot have a scouring effect on the first sealing gasket of the large ball core during the flow process, avoiding the wear and damage of the first sealing gasket caused by the scouring of the fluid, and thus the complete shutdown of the valve can be achieved.

[0010] Preferably, both ends of the liquid tank are provided with a first sealing member acting on the large ball valve body; the first sealing member includes a locking seat with a staggered layer on one side, and a positioning pressure ring is connected to the staggered layer through a wave spring. The locking seat is provided with the end of the liquid tank, and the positioning pressure ring is abutted against the large ball valve body through the first sealing gasket.

[0011] Preferably, a second sealing member is provided at both sides of the conducting opening of the large ball valve body; the second sealing member includes a locking ring threadedly connected to the conducting opening, and a second sealing gasket is provided at the end of the locking ring to abut against the small ball valve body.

[0012] Preferably, sealing rings are provided at the rotation points between the assembly port and the second valve stem, and between the second valve stem and the first valve stem.

[0013] Based on the above technical solution, the second sealing gasket is directly installed on the locking ring in the second sealing component. This is because after adopting the double-ball structure, the pre-tightening force of the seals on both sides of the large ball valve body and the small ball valve body is small, which reduces the wear between the ball and the second sealing gasket during adjustment, and the torque required for electric adjustment is small. A wave spring is used in the first sealing component to apply a large pre-tightening force to the first sealing gasket that closely fits the large ball valve body. The pre-tightening force tightly clamps the large ball valve body between the first sealing gaskets on both sides, making the fit between them tighter and the sealing state better, effectively eliminating the possibility of fluid leakage.

[0014] Preferably, it further comprises an electric actuator disposed at the top of the connecting sleeve, the output end of which is connected to the motor output gear at the top end of the first valve stem.

[0015] Preferably, an assembly port connected to the liquid tank is opened on the side of the valve seat, and the assembly port is connected to a connecting sleeve through a flange structure; the first valve stem is sleeved in the connecting sleeve, and a second hollow hole is opened on the side of the connecting sleeve, and the first valve stem is provided with an opening scale along its circumference at the same height as the second hollow hole.

[0016] Preferably, a fixing sleeve is inserted into the top end of the second valve stem through a concave-convex structure, and a first hollow hole with the same height as the opening scale is also opened in the circumference of the fixing sleeve.

[0017] Based on the above technical solution, in order to enable the operator to grasp the opening and closing status of the valve intuitively and accurately, a combination structure of the opening scale and the first hollow hole is specially designed; the electric actuator is an existing conventional structure. When the electric actuator automatically adjusts the opening and closing of the valve according to preset instructions or system feedback signals, the opening scale, with its clear scale markings, cooperates with the first hollow hole to ensure that the operator can observe the indication of the opening scale from the outside without obstruction. The staff only needs to stand outside the valve and look at the pointer or scale of the opening scale through the first hollow hole to quickly and accurately visually estimate the actual opening size of the valve.

[0018] Preferably, the rod body of the first valve stem is inserted into the small ball valve body, the interior of the rod body is a hollow structure opening upward, and the temperature probe is axially inserted into the hollow interior.

[0019] Based on the above technical solution, in order to achieve efficient collection of key parameters of the liquid in the liquid tank and avoid damage to the wiring harness of the temperature probe, the temperature probe is inserted into the preset hollow structure in the rod body; since the rod body is in direct contact with the liquid in the liquid tank, under the action of the heat transfer principle, the heat of the liquid will be quickly transferred to the outer wall of the rod body, and the temperature probe located in the hollow structure of the rod body captures this heat conduction process, and then collects the real-time temperature of the liquid; in order to further meet the needs of comprehensive monitoring of the liquid in the liquid tank, space is reserved in the hollow structure inside the rod body for installing a pressure sensor in parallel with the temperature probe. The pressure sensor can simultaneously sense and measure the pressure in the liquid tank in real time, thereby realizing the synchronous collection of two important parameters, temperature and pressure of the liquid in the liquid tank.

[0020] Preferably, a limit block is provided on the side of the rod body, and a limit groove is provided in the circumferential direction of the second valve stem, and the limit block is slidably arranged in the limit groove.

[0021] Preferably, a positioning groove is provided at the top of the second valve stem, and a limiting protrusion that is snapped into the positioning groove is provided at the bottom of the fixing sleeve.

[0022] In summary, this application has the following beneficial technical effects:

[0023] 1. To achieve zero leakage, the present invention sleeves a large ball valve body onto the outside of the small ball valve body. The large ball valve body is preset to a fully open state, so that the fluid passing through the valve seat cannot flush the first sealing gasket of the large ball core. At the same time, during assembly, the wave spring applies a large pre-tightening force to the large ball valve body and its mating first sealing gasket, so that the large ball valve body is more tightly held by the first sealing gaskets on both sides, thereby achieving a good sealing state.

[0024] 2. In the present invention, a second sealing gasket is installed at the rotation point of the large ball valve body and the small ball valve body using a locking ring, thereby achieving a sealing treatment at the rotational connection between the two;

[0025] 3. The present invention has a simple structure. A first valve stem and an electric actuator are provided to control the opening of the valve. The second valve stem and a fixed sleeve are used to completely close the valve after the electric actuator is removed. The opening adjustment and valve closing are separated and arranged, which greatly maintains the stability of the valve operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the present invention;

[0027] Figure 2 It is a cross-sectional view of the front view structure of the present invention;

[0028] Figure 3 This invention Figure 2 A magnified view of the middle part of the structure;

[0029] Figure 4 It is a cross-sectional view of the right side structure of the present invention;

[0030] Figure 5 It is a structural schematic diagram of the first valve stem in the present invention;

[0031] Figure 6 It is a structural schematic diagram of the second valve stem in the present invention;

[0032] Figure 7 It is a structural schematic diagram of the fixing sleeve in the present invention;

[0033] Figure 8 It is a cross-sectional view of the structure of the large ball valve body and the small ball valve body in the present invention;

[0034] Figure 9 It is a structural diagram of the large ball valve body and the small ball valve body in the present invention;

[0035] Figure 10 This is a schematic diagram of the exploded structure of the large ball valve body and the small ball valve body in the present invention;

[0036] Figure 11 This is a schematic diagram of the structure of the fixed sleeve after explosion in the present invention;

[0037] Figure 12 It is a front structural schematic diagram of the present invention.

[0038] Description of reference numerals:

[0039] 1. Large ball valve body, 2. First seal, 3. First valve stem, 4. Second valve stem, 5. Small ball valve body, 6. Fixed sleeve, 7. Second seal, 8. Motor output gear, 9. Valve seat, 10. Flange, 11. Connecting sleeve, 12. Electric actuator, 13. Temperature probe, 14. Sealing ring,

[0040] 101. Conducting port, 201. First sealing gasket, 202. Wave spring, 203. Positioning pressure ring, 204. Locking seat, 301. Rod body, 302. Limit block, 303. Opening scale, 401. Limit groove, 402. Positioning groove, 501. Angular opening, 601. Limit protrusion, 602. First hollow hole, 701. Locking ring, 702. Second sealing gasket, 901. Liquid tank, 902. Assembly port, 1101. Second hollow hole. DETAILED DESCRIPTION

[0041] The specific implementation of the present invention is described below with reference to the accompanying drawings and embodiments:

[0042] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which the present invention can be implemented. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in the present invention without affecting the efficacy and purpose that can be achieved by the present invention.

[0043] At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments to their relative relationships should be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0044] The following is combined with Figure 1-12 This application is further described in detail.

[0045] The embodiment of the present application discloses a ball valve with low torque and zero leakage functions.

[0046] Example 1

[0047] Reference Figures 1 to 12This embodiment discloses a ball valve with low torque and zero leakage function, including a valve seat 9 with a built-in liquid tank 901, a connecting sleeve 11, an electric actuator 12 arranged on the top of the connecting sleeve 11, a large ball valve body 1 and a small ball valve body 5 sleeved in the large ball valve body 1. The large ball valve body 1 and the small ball valve body 5 are both bidirectionally conductive, and the conductive part of the small ball valve body 5 is set as an angular opening 501. The large ball valve body 1 is rotatably arranged in the liquid tank 901. In this structure, the rotation of the large ball valve body 1 A second valve stem 4 is connected to the liquid tank 901, and a first valve stem 3 connected to a small ball valve body 5 is rotatably sleeved inside the second valve stem 4. A limiting structure for controlling the relative rotation angle is provided between the first valve stem 3 and the second valve stem 4. The opening of the valve is adjusted by rotating the small ball valve body 5, and the start and stop of the valve is achieved by rotating the large ball valve body 1. The output end of the electric actuator 12 is connected to the motor output tooth 8 at the top of the first valve stem 3, and flanges 10 for connecting to external pipelines are provided at both ends of the liquid tank 901.

[0048] An assembly port 902 communicating with the liquid tank 901 is provided on the side of the valve seat 9. The assembly port 902 is connected to the connecting sleeve 11 through a flange structure. The first valve stem 3 is sleeved in the connecting sleeve 11. A second hollow hole 1101 is provided on the side of the connecting sleeve 11. In this structure, the first valve stem 3 is provided with an opening scale 303 at the same height as the second hollow hole 1101 along its circumference. A fixing sleeve 6 is inserted into the top of the second valve stem 4 through a concave-convex structure. The fixing sleeve 6 also has a first hollow hole 602 at the same height as the opening scale 303 along its circumference. The rod body 301 of the first valve stem 3 is inserted into the small ball valve body 5. The interior of the rod body 301 is a hollow structure opening upward, and the temperature probe 13 is axially inserted into the hollow interior.

[0049] A limit block 302 is provided on the side of the rod body 301, and a limit groove 401 is opened along the circumferential direction of the second valve stem 4. The limit block 302 is slidably arranged in the limit groove 401. In this structure, a positioning groove 402 is provided on the top of the second valve stem 4, and a limiting protrusion 601 is provided at the bottom of the fixing sleeve 6 to be inserted into the positioning groove 402.

[0050] The specific implementation process is as follows: when the opening and closing degree needs to be adjusted, the electric actuator 12 is started, the motor output gear 8 and the first valve stem 3 rotate relative to the valve seat 9 and the second valve stem 4, and then the opening and closing range of the angular opening 501 in the small ball valve body 5 in the large ball valve body 1 changes, thereby achieving the opening and closing degree adjustment; during the rotation of the first valve stem 3, the limit block 302 rotates circumferentially relative to the limit groove 401, and the opening and closing degree of the first valve stem 3 is adjusted within the opening range of the limit groove 401;

[0051] When the valve needs to be closed, the electric actuator 12 is disassembled, and an external wrench is used to act on the top of the fixing sleeve 6, so that the second valve stem 4 and the large ball valve body 1 rotate relative to the valve seat 9, so that the assembly port 902 and the conducting port 101 are misaligned, thereby completely closing the valve.

[0052] Example 2

[0053] Reference Figures 1 to 12 , and based on the above embodiment, this embodiment further provides a ball valve with low torque and zero leakage function, wherein both ends of the liquid groove 901 are provided with a first sealing member 2 acting on the large ball valve body 1, the first sealing member 2 includes a locking seat 204 with a staggered layer on one side, and a positioning pressure ring 203 is connected to the staggered layer through a wave spring 202, the locking seat 204 is provided with an end of the liquid groove 901, and the positioning pressure ring 203 abuts against the large ball valve body 1 through a first sealing gasket 201, and a second sealing member 7 is provided at the guide openings 101 on both sides of the large ball valve body 1, the second sealing member 7 includes a locking ring 701 threadedly connected to the guide opening 101, and a second sealing gasket 702 is provided at the end of the locking ring 701 to abut against the small ball valve body 5, and a sealing ring 14 is provided at the rotation point between the assembly port 902 and the second valve stem 4 and between the second valve stem 4 and the first valve stem 3. In this structure, the diameter of the second sealing gasket 702 is smaller than that of the first sealing gasket 201.

[0054] The specific implementation process is as follows: during the opening and closing adjustment process, the small ball valve body 5 rotates relative to the large ball valve body 1, during which the locking ring 701 causes the second sealing gasket 702 to act on the small ball valve body 5, thereby achieving primary sealing during relative rotation; during the use of the valve, the wave spring 202 tightly presses the first sealing gasket 201 against the large ball valve body 1, and the water flow impact will not directly impact the first sealing gasket 201, thereby its secondary sealing effect will be preserved under the protection of the primary seal, and when the valve is subsequently closed, the first sealing gasket 201 can normally exert its energy efficiency.

[0055] Many other changes and modifications can be made without departing from the spirit and scope of the present invention. It should be understood that the present invention is not limited to the specific embodiments, and the scope of the present invention is defined by the appended claims.

Claims

1. A ball valve with low torque and zero leakage function, characterized in that: include: A valve seat (9) having a built-in liquid tank (901); The large ball valve body (1) and the small ball valve body (5) sleeved in the large ball valve body (1) are both bidirectionally conductive, and the conductive portion of the small ball valve body (5) is configured as an angular opening (501); The large ball valve body (1) is rotatably arranged in the liquid tank (901), and the rotation center of the large ball valve body (1) passes through the liquid tank (901) and is connected to a second valve stem (4). The second valve stem (4) is rotatably sleeved with a first valve stem (3) connected to the small ball valve body (5). A limiting structure for controlling the relative rotation angle is provided between the first valve stem (3) and the second valve stem (4). The opening size of the valve is adjusted by rotating the small ball valve body (5), and the start and stop of the valve are achieved by rotating the large ball valve body (1).

2. A ball valve with low torque and zero leakage function according to claim 1, characterized in that: Both ends of the liquid tank (901) are provided with first sealing members (2) acting on the large ball valve body (1); The first sealing member (2) includes a locking seat (204) with a staggered shape on one side, and a positioning pressure ring (203) is connected to the staggered portion via a wave spring (202). The locking seat (204) is provided with an end portion of the liquid groove (901), and the positioning pressure ring (203) abuts against the large ball valve body (1) via a first sealing gasket (201).

3. A ball valve with low torque and zero leakage function according to claim 2, characterized in that: Second sealing members (7) are provided at the conducting openings (101) on both sides of the large ball valve body (1); The second sealing member (7) comprises a locking ring (701) threadedly connected to the conducting port (101), and a second sealing gasket (702) abutting against the small ball valve body (5) is provided at the end of the locking ring (701).

4. A ball valve with low torque and zero leakage function according to claim 3, characterized in that: The side of the valve seat (9) is provided with an assembly port (902) communicating with the liquid tank (901), and the assembly port (902) is connected to a connecting sleeve (11) via a flange structure; The first valve stem (3) is sleeved in the connecting sleeve (11), a second hollow hole (1101) is provided on the side of the connecting sleeve (11), and the first valve stem (3) is provided with an opening ruler (303) along its circumference at the same height as the second hollow hole (1101).

5. A ball valve with low torque and zero leakage function according to claim 4, characterized in that: A fixing sleeve (6) is inserted into the top end of the second valve stem (4) via a concave-convex structure, and a first hollow hole (602) having the same height as the opening scale (303) is also provided around the fixing sleeve (6).

6. A ball valve with low torque and zero leakage function according to claim 4, characterized in that: It also includes an electric actuator (12) arranged on the top of the connecting sleeve (11), the output end of which is connected to the motor output tooth (8) at the top end of the first valve stem (3).

7. The ball valve with low torque and zero leakage function according to claim 4, characterized in that: Sealing rings (14) are provided at the rotation points between the assembly port (902) and the second valve stem (4), and between the second valve stem (4) and the first valve stem (3).

8. The ball valve with low torque and zero leakage function according to claim 1, characterized in that: The rod body (301) of the first valve stem (3) is inserted into the small ball valve body (5); the interior of the rod body (301) is a hollow structure opening upward, and the temperature probe (13) is axially inserted into the hollow interior.

9. The ball valve with low torque and zero leakage function according to claim 8, characterized in that: A limit block (302) is provided on the side of the rod body (301), and a limit groove (401) is provided on the second valve stem (4) along the circumferential direction, and the limit block (302) is slidably arranged in the limit groove (401).

10. The ball valve with low torque and zero leakage function according to claim 5, characterized in that: The top of the second valve stem (4) is provided with a positioning groove (402), and the bottom of the fixing sleeve (6) is provided with a limiting protrusion (601) which is inserted into the positioning groove (402).

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