Floating ball valve capable of dynamically adjusting compensation

Abstract

The utility model discloses a floating ball valve capable of dynamically adjusting compensation, relates to the technical field of ball valves, and solves the problems that a large transverse space is occupied and a rigid contact valve seat is easy to damage in the prior art. The central axis of the adjusting bolt is perpendicular to the horizontal axis, and an inclined pushing structure is arranged at the bottom end of the adjusting bolt and abuts against the rear end face of the valve seat. The inclined pushing structure comprises a radial pushing block, an axial pushing ring and radial sliding holes for accommodating the radial pushing block and the axial pushing ring respectively, the contact surfaces of the axial sliding holes, the radial pushing block and the axial pushing ring form an inclined surface, the radial pushing block and the axial pushing ring are relatively staggered through the inclined surface, and the radial pushing block is in abutting contact with the bottom end of the adjusting bolt; the axial push ring abuts against the rear end face of the valve seat. The adjusting bolt does not occupy space in the horizontal direction of the valve body any more, the space occupied by the ball valve in the horizontal transverse direction is reduced to a certain degree, and meanwhile, the inclined pushing structure achieves force conversion through the radial pushing block and the axial pushing ring.

Description

Technical Field

[0001] The utility model relates to the technical field of ball valves, in particular to a floating ball valve with dynamic adjustment and compensation. Background Art

[0002] As an important component for fluid control, the performance of a floating ball valve directly affects the stability and safety of the entire system. In the prior art of Chinese utility model patents, such as the publication number: CN219413592U, patent name: An adjustable structure for the seat of a metal-sealed ball valve, screws arranged along the horizontal axis of the valve body are used to directly contact the valve seat to adjust the pre-tightening force of the valve seat. However, this structure has many drawbacks.

[0003] First of all, the screws in this structure are arranged along the horizontal axis of the valve body. In some equipment with compact spaces, especially in compact pipeline systems, fluid control modules of precision instruments, and miniaturized energy transmission devices, the horizontal lateral space left for the installation and adjustment of the ball valve is extremely limited. And the way of arranging the screws along the horizontal axis of the valve body occupies a large lateral space, which not only limits its applicability in narrow spaces, but also may cause inconvenience in debugging operations due to limited adjustment space. Therefore, this technical solution is difficult to flexibly adapt to the scenario of limited horizontal lateral space.

[0004] Secondly, the screws directly and rigidly contact the valve seat, which not only easily causes wear on the surface of the valve seat due to the concentration of local rigid top pressure, easily leads to excessive local stress on the valve seat, resulting in deformation or damage, but also is difficult to adapt to the dynamic change of the gap caused by the wear of the valve seat during long-term use, and the sealing performance decreases as the wear intensifies. Content of the Utility Model

[0005] The purpose of the utility model: In order to overcome the defects of the prior art, the utility model provides a floating ball valve with dynamic adjustment and compensation, which solves the problems of occupying a large lateral space in the prior art and easily damaging the valve seat by rigidly contacting the valve seat.

[0006] Technical solution of the utility model: It includes a valve body, a valve seat and a sphere. The valve seat and the sphere are respectively installed in the valve body, and the front end face of the valve seat contacts the sphere to form a sealing fit. There is a flow channel in the valve body, and a horizontal axis along the medium direction is formed in the flow channel. A number of adjusting bolts are threadedly installed on the valve body. The central axis of the adjusting bolt is arranged perpendicular to the horizontal axis. The bottom end of the adjusting bolt is provided with an inclined pushing structure, and the inclined pushing structure abuts against the rear end face of the valve seat; the inclined pushing structure includes a radial pushing block, an axial pushing ring, and a radial sliding hole and an axial sliding hole for accommodating the radial pushing block and the axial pushing ring respectively. The radial sliding hole is coaxially arranged with the adjusting bolt. The valve seat is installed in the axial sliding hole. The radial sliding hole communicates with the axial sliding hole and is perpendicular. The radial pushing block and the axial pushing ring are respectively installed in the radial sliding hole and the axial sliding hole along the radial and axial directions of the flow channel. The contact surfaces of the radial pushing block and the axial pushing ring form an inclined surface. The radial pushing block and the axial pushing ring are relatively staggered through the inclined surface. The radial pushing block abuts against the bottom end of the adjusting bolt, and the axial pushing ring abuts against the rear end face of the valve seat.

[0007] With the above technical solution, by arranging the central axis of the adjusting bolt perpendicular to the horizontal axis and providing an inclined pushing structure at the bottom end of the adjusting bolt, the adjusting bolt no longer occupies space along the horizontal direction of the valve body. In this way, the traditional way of arranging the screw along the horizontal axis of the valve body is changed, and to a certain extent, the space occupied by the ball valve in the horizontal and transverse directions is reduced. This enables the floating ball valve to better adapt to scenarios with limited horizontal and transverse space, such as compact pipeline systems, fluid control modules of precision instruments, and miniaturized energy transmission devices, improving the applicability of the ball valve in these special environments; at the same time, the inclined pushing structure realizes the conversion of force through the radial pushing block and the axial pushing ring, converting the vertical force into a horizontal thrust acting on the valve seat, thereby realizing the dynamic adjustment and compensation of the sealing surface of the valve seat, solving the problem of leakage after valve wear and non-adjustable pre-tightening force. At the same time, this way of force conversion makes the force transmission more reasonable and effective.

[0008] In a possible design, an elastic member is installed between the bottom end of the adjusting bolt and the radial pushing block, and the two ends of the elastic member respectively abut against the bottom end of the adjusting bolt and the radial pushing block.

[0009] With the above design, when the adjusting bolt is subjected to an external force, the elastic member can play a buffering role, avoiding impact and damage to the radial pushing block and the valve seat caused by excessive instantaneous adjusting force. At the same time, during long-term use, the elastic member can automatically perform a certain degree of compensation according to the wear condition of the valve seat, maintaining a stable pressure on the valve seat, which helps to maintain good sealing performance.

[0010] In a possible design, a convex rib extends from one end of the axial pushing ring, and the convex rib is in limit contact with the corner of the radial sliding hole and the axial sliding hole.

[0011] With the above design, the convex rib provides physical constraints for the movement of the axial push ring and the valve seat by means of limit contact at the corner of the radial sliding hole and the axial sliding hole; when the convex rib abuts against the preset position, the valve seat can maintain the pre-tightening sealing pressure on the sphere during the initial installation stage, ensuring that the sealing surface reaches the best contact state at startup. Even during the operation of the valve, when the sphere generates floating displacement due to factors such as medium pressure, the limiting effect of the convex rib can prevent the valve seat from moving backward excessively, avoiding the leakage risk caused by insufficient sealing pressure.

[0012] In a possible design, a reserved gap is provided between the convex rib and the radial push block.

[0013] With the above design, the reserved gap allows the radial push block to have a certain range of movement, which can avoid interference between the axial push ring and the radial push block during operation, ensuring that the components of the inclined push structure can move relative to each other normally.

[0014] In a possible design, the inclined plane forms an angle of 45° with the horizontal axis.

[0015] With the above design, this angle makes the force transmission relatively stable, and can effectively convert the vertical force into a horizontal thrust within a limited space, optimizing the force transmission efficiency.

[0016] In a possible design, a sealing washer is installed between the head of the adjusting bolt and the valve body.

[0017] With the above design, it can effectively prevent the medium from leaking through the connection between the adjusting bolt and the valve body.

[0018] In a possible design, the elastic member is a helical spring.

[0019] With the above design, the helical spring has good elasticity and stability, can maintain its elastic performance for a long time, provide continuous dynamic adjustment ability, and is easy to obtain and maintain. Description of the Drawings

[0020] Figure 1 is a cross-sectional view of the present utility model;

[0021] Figure 2 is the present utility model Figure 2 is a partial enlarged view of A in;

[0022] Figure 3 is a partial enlarged view of the present utility model after the adjusting bolt is adjusted;

[0023] Among them, 1. Valve body; 11. Flow channel; 2. Valve seat; 3. Sphere; 4. Adjusting bolt; 41. Sealing washer; 5. Oblique push structure; 51. Radial push block; 52. Axial push ring; 521. Convex rib; 522. Reserved interval; 53. Radial sliding hole; 54. Axial sliding hole; 55. Inclined plane; 56. Elastic member. Specific implementation mode

[0024] Such as Figures 1 to 3 As shown, a floating ball valve with dynamic adjustment and compensation includes a valve body 1, a valve seat 2 and a sphere 3. The valve seat 2 and the sphere 3 are respectively installed in the valve body 1, and the front end face of the valve seat 2 is in contact with the sphere 3 to form a sealing fit. There is a flow channel 11 in the valve body 1, and a virtual horizontal axis is formed along the medium direction in the flow channel 11. A plurality of adjusting bolts 4 are threadedly installed on the valve body 1. It can be three adjusting bolts 4 evenly distributed outside the valve body 1. The central axis of the adjusting bolt 4 is perpendicular to the horizontal axis. The bottom end of the adjusting bolt 4 is provided with an oblique push structure 5, and the oblique push structure 5 abuts against the rear end face of the valve seat 2. The oblique push structure 5 includes a radial push block 51, an axial push ring 52, and a radial sliding hole 53 and an axial sliding hole 54 for accommodating the radial push block 51 and the axial push ring 52 respectively. The radial sliding hole 53 and the axial sliding hole 54 are both opened on the valve body 1. The radial sliding hole 53 is coaxially arranged with the adjusting bolt 4, that is, the radial sliding hole 53 is arranged along the radial direction of the flow channel 11; the valve seat 2 is movably installed in the axial sliding hole 54, that is, the axial sliding hole 54 is annular; the radial sliding hole 53 communicates with the axial sliding hole 54 and is perpendicular. The radial push block 51 and the axial push ring 52 are respectively installed in the radial sliding hole 53 and the axial sliding hole 54 along the radial and axial directions of the flow channel 11. The contact surfaces of the radial push block 51 and the axial push ring 52 form an inclined plane 55. The radial push block 51 and the axial push ring 52 are relatively staggered through the inclined plane 55. The radial push block 51 abuts against the bottom end of the adjusting bolt 4, and the axial push ring 52 abuts against the rear end face of the valve seat 2. Among them, there are three radial push blocks 51, and each radial push block 51 corresponds to an adjusting bolt 4; the axial push ring 52 is circular and has basically the same caliber as the valve seat 2. As can be seen from the above, arranging the central axis of the adjusting bolt 4 perpendicular to the horizontal axis avoids the problem of occupying a large horizontal space along the horizontal axis, making it convenient to install and debug the ball valve in a scenario with limited horizontal space. The oblique push structure 5 converts the vertical movement of the adjusting bolt 4 into a horizontal thrust on the valve seat 2 through the cooperation of the inclined planes 55 of the radial push block 51 and the axial push ring 52, avoiding the direct contact between the screw and the valve seat 2, but using the axial push ring 52 to contact the valve seat 2. The contact surface between the axial push ring 52 and the valve seat 2 is large and circular, reducing the risk of deformation or damage of the valve seat 2 due to excessive local stress, and at the same time being able to effectively adjust the position of the valve seat 2 to ensure the sealing performance between the valve seat 2 and the sphere 3.

[0025] An elastic member 56 is installed between the bottom end of the adjusting bolt 4 and the radial push block 51, and both ends of the elastic member 56 are respectively abutted against the bottom end of the adjusting bolt 4 and the radial push block 51. Installing the elastic member 56 between the bottom end of the adjusting bolt 4 and the radial push block 51, the elastic member 56 can play a buffering role. When the valve is subjected to vibration, impact or medium pressure fluctuation, the elastic member 56 can relieve the impact force of the adjusting bolt 4 on the radial push block 51, and further protect the valve seat 2 from being damaged by excessive extrusion. At the same time, the elastic member 56 can also achieve a certain degree of dynamic adjustment compensation. When the valve seat 2 has slight wear, the elastic member 56 can push the radial push block 51 and the axial push ring 52 through its own elastic deformation, so that the valve seat 2 can continue to maintain good sealing contact with the sphere 3.

[0026] One end of the axial push ring 52 extends with a convex rib 521, and the convex rib 521 is in limiting contact with the corner of the radial sliding hole 53 and the axial sliding hole 54. At the initial stage of the installation of the valve seat 2, due to the limiting effect of the convex rib 521, when the convex rib 521 abuts against the corresponding position, the axial push ring 52 and the valve seat 2 cannot move further backward. This means that when the valve seat 2 contacts the sphere 3, it will maintain a certain initial position, thereby applying a pre-tightening sealing pressure to the sphere 3. This pre-tightening sealing pressure can form good sealing contact between the valve seat 2 and the sphere 3 before the sphere 3 bears the medium pressure or floating force, effectively preventing the medium from leaking in the initial stage. During the normal floating process of the sphere 3, the valve seat 2 may have a certain displacement due to factors such as the floating of the sphere 3, and the limiting setting of the convex rib 521 sets a limit moving position for the valve seat 2. Even under the action of the floating of the sphere 3, the valve seat 2 will not exceed this limit position, ensuring that a stable sealing state is always maintained between the valve seat 2 and the sphere 3. At the same time, it prevents the elastic member 56 from being excessively squeezed and failing due to the excessive backward movement of the valve seat 2.

[0027] A reserved interval 522 is provided between the convex rib 521 and the radial push block 51, providing a certain movement space for the relative movement of the radial push block 51 and the axial push ring 52. During the adjustment process, when the adjusting bolt 4 rotates to push the radial push block 51, this reserved interval 522 can prevent the convex rib 521 from interfering with the movement of the radial push block 51, making the operation of the inclined push structure 5 smoother and facilitating the precise adjustment of the compensation pressure between the valve seat 2 and the sphere 3.

[0028] The inclined surface 55 forms an angle of 45° with the horizontal axis. At this angle, the conversion efficiency of the vertical displacement of the adjusting bolt 4 into the horizontal displacement of the axial push ring 52 is relatively high, and relatively sensitive and precise adjustment can be achieved. The 45° angle makes the force transmission relatively stable. When adjusting the position of the valve seat 2, it can better balance the forces in all directions, ensuring uniform and reliable sealing between the valve seat 2 and the sphere 3.

[0029] A sealing washer 41 is installed between the head nut of the adjusting bolt 4 and the valve body 1, which can prevent the medium from leaking at the connection between the adjusting bolt 4 and the valve body 1, improve the overall sealing performance of the valve, and at the same time, has the effect of preventing the adjusting bolt 4 from loosening.

[0030] The elastic member 56 is selected as a helical spring. The helical spring has good elasticity and stability and can provide a stable elastic force. Moreover, the structure of the helical spring is simple, the cost is low, it is convenient for installation and replacement. While realizing the dynamic adjustment compensation for the valve seat 2 and protecting the valve seat 2, it can also reduce the manufacturing cost of the ball valve.

[0031] More specifically, three socket head cap screws 4 with internal hexagons are arranged at the inlet end of the valve body 1, and are evenly distributed on the outer periphery of the valve body 1 at an angle of 120° ± 0.5°. A stress relief groove with a depth of 0.5 mm is opened at the head of the adjusting bolt 4. A spring and a radial push block 51 are sequentially arranged below each adjusting screw. When adjusting, a step-by-step pre-tightening method is adopted, and the step-by-step pre-tightening method is as follows:

[0032] 1. Initially pre-tighten to a contact pressure of 0.5 PN (PN is the nominal pressure).

[0033] 2. Sequentially increase the pre-tightening force by 20% in a clockwise order.

[0034] 3. Reach the target value after three cycles (total adjustment time ≤ 15 minutes).

[0035] Maintenance adjustment: Rotate the adjusting bolt 4 through an external adjusting wrench to compensate for the wear of the valve seat 2 (maximum compensation 0.5 mm).

[0036] The assembly method of this application is as follows:

[0037] 1. Place the axial push ring 52 into the axial sliding hole 54 of the valve body 1 to ensure that it fits against the rear end face of the valve seat 2.

[0038] 2. Install the radial push block 51, helical spring and adjusting bolt 4 into the radial sliding hole 53 in sequence, and use a torque wrench to apply an initial pre-tightening force (10 N·m) in a 120° order.

[0039] 3. Use a wrench to perform three progressive pre-tightenings, and finally torque to 35 N·m (corresponding to a sealing specific pressure of 12 MPa).

Claims

1. A dynamically adjustable and compensated floating ball valve, comprising a valve body (1), a valve seat (2) and a ball (3), wherein the valve seat (2) and the ball (3) are respectively installed in the valve body (1) and the front end surface of the valve seat (2) contacts with the ball (3) to form a sealing fit, wherein the valve body (1) has a flow channel (11), wherein a horizontal axis is formed in the flow channel (11) along the direction of the medium, and wherein: A plurality of adjusting bolts (4) are threadedly mounted on the valve body (1), the central axis of the adjusting bolt (4) being arranged perpendicular to the horizontal axis, and an oblique push structure (5) being arranged at the bottom end of the adjusting bolt (4), the oblique push structure (5) being pressed against the rear end surface of the valve seat (2); The oblique push structure (5) comprises a radial push block (51), an axial push ring (52), and a radial slide hole (53) and an axial slide hole (54) for accommodating the radial push block (51) and the axial push ring (52) respectively. The radial slide hole (53) is coaxially arranged with the adjusting bolt (4). The valve seat (2) is installed in the axial slide hole (54). The radial slide hole (53) is communicated with the axial slide hole (54) and is vertical. The radial push block (51) and the axial push ring (52) are 2) are respectively installed in the radial sliding hole (53) and the axial sliding hole (54) for radial and axial movement along the flow channel (11), the contact surfaces of the radial push block (51) and the axial push ring (52) form an inclined surface (55), the radial push block (51) and the axial push ring (52) are relatively staggered through the inclined surface (55), the radial push block (51) is in contact with the bottom end of the adjusting bolt (4), and the axial push ring (52) is in contact with the rear end surface of the valve seat (2).

2. The dynamically adjustable and compensated floating ball valve according to claim 1, characterized in that: An elastic member (56) is installed between the bottom end of the adjusting bolt (4) and the radial push block (51), and two ends of the elastic member (56) respectively abut against the bottom end of the adjusting bolt (4) and the radial push block (51).

3. The dynamically adjusted and compensated floating ball valve according to claim 1 or 2, characterized in that: A convex ridge (521) extends from one end of the axial push ring (52), and the convex ridge (521) can be limitedly contacted at the corner of the radial sliding hole (53) and the axial sliding hole (54).

4. The dynamically adjustable and compensated floating ball valve according to claim 3, characterized in that: A reserved space (522) is provided between the convex ridge (521) and the radial push block (51).

5. The dynamically adjustable and compensated floating ball valve according to claim 1 or 2, characterized in that: The inclined surface (55) forms an angle of 45° with the horizontal axis.

6. The dynamically adjustable and compensated floating ball valve according to claim 1 or 2, characterized in that: A sealing gasket (41) is installed between the head of the adjusting bolt (4) and the valve body (1).

7. The dynamically adjustable and compensated floating ball valve according to claim 2, characterized in that: The elastic member (56) is a coil spring.

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