A double ball valve structure

Abstract

This invention provides a double ball valve structure, relating to the field of valves, comprising: a valve body support; a first ball valve fixedly connected to the left side of the upper surface of the valve body support via a welded bracket; a second ball valve fixedly connected to the right side of the upper surface of the valve body support via a welded bracket; and a valve body inlet fixedly connected to the water inlet of the first ball valve. This reduces pressure instability in the hydraulic system caused by hydraulic fluctuations. It can be seen that the first and second synchronous handles respectively provide different adjustment effects for the two valve bodies, avoiding the situation where misoperation of the handles leads to incorrect valve control. This solves the problem that, with existing double ball valves, opening and closing the double ball valve requires rotating the handles of both ball valves separately, and the opening and closing method of the ball valve is bidirectional rotation of the handle, which can easily cause the valve to rotate in the opposite direction due to misoperation, resulting in inaccurate opening and closing of the valve body.

Description

Technical Field

[0001] This invention relates to the field of valve technology, and in particular to a double ball valve structure. Background Technology

[0002] The structure of the double ball valve is a double L-shaped floating three-way ball valve. This type of ball valve is manually controlled by a handle. In hydraulic system pipelines of industries such as power, petrochemical, metallurgy, marine, oil, natural gas, coal gas, and pharmaceutical, in order to simplify the complex connection of multiple valves in traditional pipelines and reduce leakage points in the system, double ball valves are often used to replace ordinary multiple valves.

[0003] However, with the existing double ball valves, opening and closing the double ball valve requires rotating the handles of both ball valves separately, which is not conducive to the first synchronization and closing control of the two ball valves. The ball valve opens and closes by rotating the handles in both directions, which can easily cause the valve to rotate in the opposite direction due to misoperation, making it impossible to accurately open and close the valve body. Summary of the Invention

[0004] In view of this, the present invention provides a double ball valve structure to solve the problem that, in the existing double ball valves, opening and closing the double ball valve requires rotating the handles of the two ball valves separately, which is not conducive to the first synchronization and closing control of the two ball valves. The opening and closing method of the ball valve is bidirectional rotation of the handle, which is prone to reverse rotation of the valve due to misoperation during operation, and cannot accurately realize the opening and closing of the valve body.

[0005] This invention provides a double ball valve structure, specifically comprising: a valve body support; a first ball valve fixedly connected to the left side of the upper surface of the valve body support via a welded bracket; a second ball valve fixedly connected to the right side of the upper surface of the valve body support via a welded bracket; a valve body inlet fixedly connected to the water inlet end of the first ball valve; a valve body outlet fixedly connected to the water outlet end of the second ball valve via a welded bracket; the water outlet end of the first ball valve connected to the water inlet end of the second ball valve via a pipe; a valve core synchronous coupling, the two ends of which are respectively connected to the first ball valve and the second ball valve; a first synchronous handle, the shaft of which is movably connected above the valve body support; a second synchronous handle, the shaft of which is movably connected above the valve body support; the second synchronous handle being located in front of the first synchronous handle; a synchronous drive shaft rotatably connected to the valve body support via a bearing; and a pressure relief end cylinder fixedly connected by welding to the middle of the connecting pipe between the first ball valve and the second ball valve.

[0006] Furthermore, a side support is welded to the front and rear of the upper surface of the valve body support, respectively. The side supports are perpendicular to the upper surface of the valve body support, and the same upper support plate is fixedly connected above the two side supports.

[0007] Furthermore, an adjusting worm gear is fixedly connected in the middle of the valve core synchronous coupling, the left end of the valve core synchronous coupling is fixedly connected to the valve core shaft of the first ball valve through a coupling, and the right end of the valve core synchronous coupling is fixedly connected to the valve core shaft of the second ball valve through a coupling.

[0008] Furthermore, the first synchronous handle's rotating shaft is rotatably connected to the upper support plate, the lower end of the first synchronous handle's rotating shaft is connected to the first synchronous rotating shaft via the first limiting ratchet, and the lower end of the first synchronous rotating shaft is fixedly connected to the first synchronous drive wheel via an interference fit.

[0009] Furthermore, the rotating shaft of the second synchronous handle is rotatably connected to the upper support plate, the lower end of the rotating shaft of the second synchronous handle is connected to the second synchronous rotating shaft through the second limiting ratchet, and the lower end of the second synchronous rotating shaft is fixedly connected to the second synchronous drive wheel through an interference fit.

[0010] Furthermore, a first driven wheel is fixedly connected to the synchronous drive shaft by an interference fit, and a second driven wheel is fixedly connected to the synchronous drive shaft by an interference fit. The second driven wheel is located in front of the first driven wheel. The first driven wheel is engaged with the first synchronous driving wheel, and the second driven wheel is engaged with the second synchronous driving wheel.

[0011] Furthermore, a drive worm is fixedly connected to the synchronous drive shaft by an interference fit, and an adjusting worm wheel is meshed below the drive worm, forming a worm gear transmission between the drive worm and the adjusting worm wheel.

[0012] Furthermore, an upper guide protrusion is fixedly connected above the pressure relief end cylinder, and a lower guide protrusion is fixedly connected below the pressure relief end cylinder. The lower guide protrusion is coaxial with the upper guide protrusion, and a lifting pressure relief pin is slidably connected inside the upper guide protrusion and the lower guide protrusion.

[0013] Furthermore, a drain outlet is provided on the side of the lifting and draining pin, a lower limit end plate is fixedly connected to the lower end of the lifting and draining pin, and a pin cap is fixedly connected to the upper end of the lifting and draining pin.

[0014] Furthermore, a reset top spring is fixedly connected to the upper end of the upper guide protrusion. The upper end of the reset top spring is fixedly connected to the lower surface of the upper end cap of the lifting pressure pin, and the reset top spring is sleeved on the outside of the lifting pressure pin.

[0015] Beneficial effects

[0016] 1. After the valves in this invention are installed in the pipeline system, the two valves are connected in series, which plays a double-locking role for the pipeline. The double sealing can effectively reduce the probability of pipeline leakage and improve the operational stability of the hydraulic system. During the adjustment of the two valves, when the first synchronous handle is rotated, the synchronous drive shaft is driven to rotate through the gear transmission between the first synchronous driving wheel and the first driven wheel. Through the transmission between the active worm and the adjusting worm wheel, the valve core is driven to rotate synchronously. The synchronous rotation of the valve core simultaneously drives the valve stems of the first ball valve and the second ball valve to rotate, realizing the synchronous switching of the valve body state and reducing the pressure instability of the hydraulic system caused by hydraulic fluctuations.

[0017] 2. This invention includes two adjustment handles: a first synchronization handle and a second synchronization handle. A ratchet mechanism is installed below each handle. The first and second synchronization handles are connected to a first and a second synchronization shaft respectively via the ratchet mechanism. The pawls of both ratchet mechanisms face the same direction. Rotating the first or second synchronization handle counterclockwise rotates the first or second synchronization shaft. If the first synchronization handle is rotated counterclockwise alone, the ratchet mechanism rotates the first synchronization shaft, driving the synchronous drive shaft to rotate. Simultaneously, the second driven wheel engages with the second synchronous driving wheel, driving the synchronous drive shaft to rotate. When the second synchronous shaft rotates clockwise, the ratchet between the second synchronous shaft and the second synchronous handle prevents the second synchronous handle from being driven. Conversely, when the second synchronous handle is rotated counterclockwise, the synchronous drive shaft can be driven to rotate in the opposite direction, but the first synchronous handle cannot be driven to rotate. It can be seen that when the first and second synchronous handles are rotated counterclockwise, the driving directions of the synchronous drive shaft are inconsistent, resulting in opposite adjustment directions for the valve cores of the two valve bodies. The first and second synchronous handles respectively provide different adjustment effects for the two valve bodies, and do not interfere with each other, thus avoiding the situation where misoperation of the handles leads to incorrect control of the valve bodies.

[0018] 3. When depressurizing the valve body in this invention, the lifting and depressurizing pin can be driven to move downward by pressing down on it, so that the drain pin port passes longitudinally through the lower guide protrusion, realizing the connection between the inside of the depressurizing end cylinder and the outside, thus achieving the depressurization effect. After the depressurization is completed, the lifting and depressurizing pin moves upward and resets under the action of the reset top spring, re-sealing the depressurizing end cylinder, realizing the function of rapid depressurization of the valve body, making the operation faster and more convenient. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0020] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0021] In the attached diagram:

[0022] Figure 1 This is a structural schematic diagram of an embodiment of the present invention.

[0023] Figure 2 This is a schematic diagram of the bottom structure of an embodiment of the present invention.

[0024] Figure 3 This is an embodiment of the present invention. Figure 1 A schematic diagram of the structure viewed from the left.

[0025] Figure 4 This is a schematic diagram of the connection state between the synchronous drive shaft and the first and second synchronous handles in an embodiment of the present invention.

[0026] Figure 5 This is a schematic diagram of the structure of the pressure relief end cylinder according to an embodiment of the present invention.

[0027] Figure 6 This is a schematic diagram of the pressure relief end cylinder under normal operating conditions according to an embodiment of the present invention.

[0028] Figure 7 This is a schematic diagram of the structure of the pressure relief end cylinder in the pressure relief state according to an embodiment of the present invention.

[0029] Figure 8 This is an embodiment of the present invention. Figure 2 A magnified structural diagram of point A.

[0030] List of reference numerals

[0031] 1. Valve body support; 101. Side support; 102. Upper support plate; 2. Valve body inlet end; 3. Valve body outlet end; 4. First ball valve; 5. Second ball valve; 6. Valve core synchronous coupling; 601. Adjusting worm gear; 7. First synchronous handle; 701. First limit ratchet; 702. First synchronous rotating shaft; 7021. First synchronous driving wheel; 8. Second synchronous handle; 801. Second limit ratchet; 802. Second synchronous rotating shaft; 8021. Second synchronous driving wheel; 9. Synchronous drive shaft; 901. First driven wheel; 902. Second driven wheel; 903. Driving worm gear; 10. Pressure relief end cylinder; 1001. Upper guide protrusion; 10011. Reset top spring; 1002. Lower guide protrusion; 1003. Lifting pressure relief pin; 10031. Drainage pin port; 10032. Lower limit end plate. Detailed Implementation

[0032] To make the objectives, solutions, and advantages of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Unless otherwise stated, the terms used herein have their ordinary meanings in the art. The same reference numerals in the drawings represent the same parts.

[0033] Example: Please refer to Figures 1 to 8 As shown:

[0034] This invention provides a double ball valve structure, including a valve body support 1; a first ball valve 4 is fixedly connected to the left side of the upper surface of the valve body support 1 via a welded bracket; a second ball valve 5 is fixedly connected to the right side of the upper surface of the valve body support 1 via a welded bracket; a valve body inlet end 2 is fixedly connected to the water inlet end of the first ball valve 4; a valve body outlet end 3 is fixedly connected to the water outlet end of the second ball valve 5 via a welded bracket; the water outlet end of the first ball valve 4 is connected to the water inlet end of the second ball valve 5 via a pipe; and a valve core synchronous coupling 6 is used to synchronize the valve cores. The two ends of the step-connecting shaft 6 are respectively connected to the first ball valve 4 and the second ball valve 5; the first synchronous handle 7, the shaft of the first synchronous handle 7 is movably connected above the valve body support 1; the second synchronous handle 8, the shaft of the second synchronous handle 8 is movably connected above the valve body support 1; the second synchronous handle 8 is located in front of the first synchronous handle 7; the synchronous drive shaft 9, the synchronous drive shaft 9 is rotatably connected to the valve body support 1 through bearings; the pressure relief end cylinder 10, the pressure relief end cylinder 10 is fixedly connected to the middle of the connecting pipe between the first ball valve 4 and the second ball valve 5 by welding.

[0035] Among them, a side support 101 is welded to the front and rear of the upper surface of the valve body support 1, respectively. The side support 101 is perpendicular to the upper surface of the valve body support 1. The same upper support plate 102 is fixedly connected above the two side supports 101. The rotating shaft of the first synchronous handle 7 is rotatably connected to the upper support plate 102, and the rotating shaft of the second synchronous handle 8 is rotatably connected to the upper support plate 102, which serves to support the handle.

[0036] The valve core synchronous coupling 6 is fixedly connected to the middle of an adjusting worm gear 601. The left end of the valve core synchronous coupling 6 is fixedly connected to the valve core shaft of the first ball valve 4 via a coupling. The right end of the valve core synchronous coupling 6 is fixedly connected to the valve core shaft of the second ball valve 5 via a coupling. A first driven wheel 901 is fixedly connected to the synchronous drive shaft 9 via an interference fit. A second driven wheel 902 is fixedly connected to the synchronous drive shaft 9 via an interference fit. The second driven wheel 902 is located in front of the first driven wheel 901. The first driven wheel 901 is engaged with the first synchronous driving wheel 7021. The second driven wheel 902 is engaged with the second synchronous driving wheel 8021. A driving worm gear 903 is fixedly connected to the synchronous drive shaft 9 via an interference fit. The adjusting worm gear 601 is engaged below the driving worm gear 903. 1. The active worm gear 903 and the adjusting worm wheel 601 form a worm gear transmission; the lower end of the rotating shaft of the first synchronous handle 7 is connected to the first synchronous rotating shaft 702 through the first limiting ratchet 701, and the lower end of the first synchronous rotating shaft 702 is fixedly connected to the first synchronous active wheel 7021 through an interference fit; when the first synchronous handle 7 is rotated, the synchronous drive shaft 9 is driven to rotate through the gear transmission of the first synchronous active wheel 7021 and the first driven wheel 901, and the valve core synchronous coupling shaft 6 is driven to rotate through the worm gear transmission of the active worm gear 903 and the adjusting worm wheel 601, and the valve core synchronous coupling shaft 6 is driven to rotate simultaneously through the rotation of the valve core synchronous coupling shaft 6, thereby realizing the synchronous switching of the valve body state and reducing the pressure instability of the hydraulic system caused by hydraulic fluctuations in the hydraulic system.

[0037] The lower end of the rotating shaft of the second synchronous handle 8 is connected to the second synchronous rotating shaft 802 via the second limiting ratchet 801. The lower end of the second synchronous rotating shaft 802 is fixedly connected to the second synchronous driving wheel 8021 via an interference fit. When the second synchronous handle 8 is rotated counterclockwise, the second synchronous handle 8 drives the second synchronous rotating shaft 802 and the second synchronous driving wheel 8021 to rotate via the ratchet. When the second synchronous driving wheel 8021 rotates, it drives the synchronous drive shaft 9 to rotate through the meshing connection with the second driven wheel 902. It can be seen that when the first synchronous handle 7 and the second synchronous handle 8 are rotated counterclockwise, the driving direction of the synchronous drive shaft 9 is inconsistent, so that the adjustment direction of the valve core of the two valve bodies is opposite. The first synchronous handle 7 and the second synchronous handle 8 respectively play different adjustment effects on the two valve bodies.

[0038] The pressure relief end cylinder 10 is fixedly connected to an upper guide protrusion 1001 above it, and a lower guide protrusion 1002 is fixedly connected to a lower part of it. The lower guide protrusion 1002 is coaxial with the upper guide protrusion 1001. A lifting pressure discharge pin 1003 is slidably connected inside the upper guide protrusion 1001 and the lower guide protrusion 1002. A drain pin port 10031 is opened on the side of the lifting pressure discharge pin 1003. A lower limit end plate 10032 is fixedly connected to the lower end of the lifting pressure discharge pin 1003. A pin cap is fixedly connected to the upper end of the lifting pressure pin 1003, and a reset top spring 10011 is fixedly connected to the upper end of the upper guide protrusion 1001. The upper end of the reset top spring 10011 is fixedly connected to the lower surface of the pin cap at the upper end of the lifting pressure pin 1003, and the reset top spring 10011 is sleeved on the outside of the lifting pressure pin 1003. Under normal conditions, the lifting pressure pin 1003 is pressed upward by the reset top spring 10011, and the lower limit end plate 10032 and the lower guide protrusion 1002 are fixedly connected. The surfaces are tightly fitted together, and the return spring 10011 serves as a positioning mechanism, ensuring that the drain pin 10031 is completely inside the pressure relief cylinder 10. The lifting pressure relief pin 1003 is tightly connected to the lower guide protrusion 1002 and the upper guide protrusion 1001, and there is no leakage during normal use. After the valve body is closed, it is necessary to depressurize the valve body to extend its service life. When depressurizing the valve body, the lifting pressure relief pin 1003 can be driven to move downward by pressing down on it, thus allowing the drain pin to drain. The outlet 10031 passes longitudinally through the lower guide protrusion 1002, realizing the connection between the inside of the pressure relief cylinder 10 and the outside, thus achieving the pressure relief effect. After the pressure relief is completed, the lifting pressure relief pin 1003 moves upward and resets under the action of the reset top spring 10011. The reset top spring 10011 achieves the effect of automatic reset. After the lifting pressure relief pin 1003 moves upward, the drain pin outlet 10031 completely enters the inside of the pressure relief cylinder 10, re-sealing the pressure relief cylinder 10 and realizing the function of rapid pressure relief of the valve body.

[0039] The specific usage and function of this embodiment: In this invention, firstly, the valve body inlet end 2 and valve body outlet end 3 are respectively connected to the liquid inlet pipe. During the adjustment of the two valves, when the first synchronous handle 7 is rotated counterclockwise, the first synchronous rotating shaft 702 is driven to rotate under the action of the ratchet. The synchronous drive shaft 9 is driven to rotate through the gear transmission between the first synchronous driving wheel 7021 and the first driven wheel 901. The valve core synchronous coupling shaft 6 is driven to rotate through the worm gear transmission between the driving worm 903 and the adjusting worm wheel 601. The rotation of the valve core synchronous coupling shaft 6 simultaneously drives the valve stems of the first ball valve 4 and the second ball valve 5 to rotate. Conversely, when the second synchronous handle 8 is rotated counterclockwise, the synchronous drive shaft 9 can be driven to rotate in the opposite direction, but the first synchronous handle 7 cannot be driven to rotate. It can be seen that rotating the first synchronous handle 7 and the second synchronous handle 8 counterclockwise... When the driving directions of the synchronous drive shaft 9 are inconsistent, the adjustment directions of the valve cores of the two valve bodies are opposite. The first synchronous handle 7 and the second synchronous handle 8 respectively play different adjustment roles for the two valve bodies and do not interfere with each other, realizing the synchronous switching of the valve body state and reducing the pressure instability of the hydraulic system caused by hydraulic fluctuations. When the valve body is closed, when depressurizing the valve body, the lifting pressure release pin 1003 can be driven to move downward by pressing down the lifting pressure release pin 1003, so that the drain pin port 10031 passes longitudinally through the lower guide protrusion 1002, realizing the connection between the inside of the pressure release end cylinder 10 and the outside, thus realizing the pressure release effect. After the pressure release is completed, the lifting pressure release pin 1003 moves upward and resets under the action of the reset top spring 10011, re-closing the pressure release end cylinder 10, realizing the function of rapid pressure release of the valve body.

[0040] Finally, it should be noted that when describing the position of each component and the mating relationship between them, the present invention usually uses one or a pair of components as examples. However, those skilled in the art should understand that such positions, mating relationships, etc., are also applicable to other components or other pairs of components.

[0041] The above description is merely an exemplary embodiment of the present invention and is not intended to limit the scope of protection of the present invention, which is determined by the appended claims.

Claims

1. A double ball valve structure, characterized in that, include: Valve body support (1); a first ball valve (4) is fixedly connected to the left side of the upper surface of the valve body support (1) by a welding bracket; a second ball valve (5), the second ball valve (5) is fixedly connected to the right side of the upper surface of the valve body support (1) by a welding bracket; the valve body inlet end (2) is fixedly connected to the water inlet end of the first ball valve (4); the valve body outlet end (3), the valve body outlet end (3) is fixedly connected to the water outlet end of the second ball valve (5) by a welding bracket; the water outlet end of the first ball valve (4) is connected to the water inlet end of the second ball valve (5) through a pipe; valve core synchronous coupling (6), the two ends of the valve core synchronous coupling (6) are respectively connected to the first ball valve ( 4) and second ball valve (5); first synchronous handle (7), the shaft of the first synchronous handle (7) is movably connected above the valve body support (1); second synchronous handle (8), the shaft of the second synchronous handle (8) is movably connected above the valve body support (1); the second synchronous handle (8) is located in front of the first synchronous handle (7); synchronous drive shaft (9), the synchronous drive shaft (9) is rotatably connected to the valve body support (1) through bearings; pressure relief end cylinder (10), the pressure relief end cylinder (10) is fixedly connected by welding to the middle of the connecting pipe between the first ball valve (4) and the second ball valve (5); the upper surface of the valve body support (1) A side support (101) is welded to the front and rear of the valve body support (1), and the side support (101) is perpendicular to the upper surface of the valve body support (1). The same upper support plate (102) is fixedly connected above the two side supports (101). The shaft of the first synchronous handle (7) is rotatably connected to the upper support plate (102). The lower end of the shaft of the first synchronous handle (7) is connected to the first synchronous shaft (702) through the first limiting ratchet (701). The lower end of the first synchronous shaft (702) is fixedly connected to the first synchronous drive wheel (7021) through an interference fit. The shaft of the second synchronous handle (8) is rotatably connected to the upper support plate (102). The lower end of the rotating shaft of the two synchronous handles (8) is connected to the second synchronous rotating shaft (802) through the second limiting ratchet (801). The two sets of ratchet pawls face the same direction. The lower end of the second synchronous rotating shaft (802) is fixedly connected to the second synchronous driving wheel (8021) through an interference fit. The upper guide protrusion (1001) is fixedly connected above the pressure relief end cylinder (10), and the lower guide protrusion (1002) is fixedly connected below the pressure relief end cylinder (10). The lower guide protrusion (1002) is coaxial with the upper guide protrusion (1001). The upper guide protrusion (1001) and the lower guide protrusion (1002) are slidably connected to the lifting pressure relief pin (1003).

2. The double ball valve structure as described in claim 1, characterized in that: The valve core synchronous coupling (6) is fixedly connected to the middle of an adjusting worm gear (601). The left end of the valve core synchronous coupling (6) is fixedly connected to the valve core shaft of the first ball valve (4) through a coupling. The right end of the valve core synchronous coupling (6) is fixedly connected to the valve core shaft of the second ball valve (5) through a coupling.

3. The double ball valve structure as described in claim 1, characterized in that: A first driven wheel (901) is fixedly connected to the synchronous drive shaft (9) by an interference fit, and a second driven wheel (902) is fixedly connected to the synchronous drive shaft (9) by an interference fit. The second driven wheel (902) is located in front of the first driven wheel (901). The first driven wheel (901) is engaged with the first synchronous driving wheel (7021), and the second driven wheel (902) is engaged with the second synchronous driving wheel (8021).

4. The double ball valve structure as described in claim 2, characterized in that: The synchronous drive shaft (9) is fixedly connected to the active worm (903) by interference fit, and the lower part of the active worm (903) is engaged with the adjusting worm wheel (601), forming a worm gear transmission between the active worm (903) and the adjusting worm wheel (601).

5. The double ball valve structure as described in claim 1, characterized in that: The lifting and draining pin (1003) has a drain outlet (10031) on its side. The lower end of the lifting and draining pin (1003) is fixedly connected to a lower limit end plate (10032), and the upper end of the lifting and draining pin (1003) is fixedly connected to a pin cap.

6. The double ball valve structure as described in claim 5, characterized in that: The upper end of the upper guide protrusion (1001) is fixedly connected to a reset top spring (10011). The upper end of the reset top spring (10011) is fixedly connected to the lower surface of the upper end cap of the lifting pressure pin (1003). The reset top spring (10011) is sleeved on the outside of the lifting pressure pin (1003).

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