Ball valve sealing performance detection device

Abstract

The invention discloses a ball valve sealing performance detection device, and relates to the technical field of ball valve performance detection, the ball valve sealing performance detection device comprises a base and a ball valve body, the upper end of the base is fixedly connected with a test box, the upper end of the base is fixedly connected with a fixing frame, the inner top of the fixing frame is fixedly connected with a fixing rod, and the lower end of the fixing rod is fixedly connected with an assembly frame; the detection mechanism comprises two rotating shafts which are symmetrically and rotatably connected to the inner wall of the assembly frame, two test pipelines are fixedly connected to the side walls, close to each other, of the two rotating shafts, a gas pumping box is fixedly connected to the inner wall of the test box, and a sliding plug is slidably connected to the inner wall of the gas pumping box in a sealed mode. The driving motor rotates in the forward direction, the sealing performance of the ball valve body can be detected, and the valve rod of the ball valve body is repeatedly rotated in the detection process, so that the ball valve is alternately opened and closed, and the sealing performance of the ball valve body after the valve rod is frequently rotated is detected.

Description

Technical Field

[0001] The invention relates to the technical field of ball valve performance detection, and in particular to a ball valve sealing performance detection device. Background Art

[0002] The ball valve is driven by a valve stem and rotates around the axis of the ball valve. It can be used for fluid regulation and control. The hard-sealed V-type ball valve has a strong shear force between the V-type ball core and the metal valve seat with hard alloy overlay, which is particularly suitable for media containing fibers, tiny solid particles, etc.

[0003] The quality of a ball valve is mainly reflected in its sealing performance. At present, when testing the sealing performance of a ball valve, the ball valve is usually placed in a water tank, and then gas is input into the input pipe of the ball valve to observe whether bubbles are generated at the output pipe of the ball valve. If no bubbles are generated, the sealing performance of the ball valve is good. However, this detection method still has defects. When the ball valve is in use, the ball inside it will rotate by rotating the valve stem, and the rotation of the ball will produce friction with the inner wall of the valve body. Frequent friction will cause the ball to wear, which will lead to a decrease in sealing performance. The existing detection method lacks detection of this situation, and it is impossible to know the specific impact of frequent rotation of the ball on the sealing performance. In addition, the existing ball valve is stationary during detection, and the detection environment is single.

[0004] Based on this, we propose a ball valve sealing performance detection device. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings in the prior art and to propose a ball valve sealing performance detection device.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A ball valve sealing performance detection device comprises a base and a ball valve body, wherein the upper end of the base is fixedly connected to a test box, the upper end of the base is fixedly connected to a fixing frame, the top of the fixing frame is fixedly connected to a fixing rod, and the lower end of the fixing rod is fixedly connected to an assembly frame; The detection mechanism comprises two rotating shafts symmetrically connected to the inner wall of the assembly frame, two test pipes are fixedly connected to the side walls of the two rotating shafts close to each other, a pump air box is fixedly connected to the inner wall of the test box, a sliding plug is sealingly and slidably connected to the inner wall of the pump air box, and two rotating joints are symmetrically fixedly connected to the side wall of the assembly frame through a bracket, an air groove is opened in each of the two rotating shafts, one end of the air groove is connected to the inside of the test pipe, and one end of the rotating shaft passes through the side wall of the assembly frame and is fixedly connected to the rotating joint, a connecting pipe is fixedly connected to the inner wall of the pump air box, and the other end of the connecting pipe is fixedly connected to one of the rotating joints; A driving mechanism is installed in the test box.

[0007] Preferably, the detection mechanism also includes a horizontal plate fixedly connected to the side wall of the assembly frame, the upper end of the horizontal plate is fixedly connected to an exhaust duct, the exhaust duct runs through the horizontal plate, the inner wall of the exhaust duct is provided with a plurality of one-way exhaust holes, and the top of the exhaust duct is provided with a one-way air inlet hole.

[0008] Preferably, the driving mechanism includes a first rotating rod rotatably connected to the inner wall of the test box, a disc is fixedly connected to the side wall of the first rotating rod, a sliding groove is opened on the side wall of the disc, a slider is slidably connected to the inner wall of the sliding groove, a pin is fixedly connected to the side wall of the slider, a first connecting rod is rotatably connected to the side wall of the pin, a second connecting rod is rotatably connected to the side wall of the sliding plug, the other end of the first connecting rod is rotatably connected to a connecting block, and the other end of the second connecting rod passes through the side wall of the pump air box and is rotatably connected to the connecting block.

[0009] Preferably, the driving mechanism further comprises a motor fixedly connected to the upper end of the base via a bracket, a one-way bearing is fixedly connected to the output end of the motor, and one end of the first rotating rod penetrates the side wall of the test box and is fixedly connected to the one-way bearing.

[0010] Preferably, a toggle mechanism is installed on the second connecting rod, and the toggle mechanism includes two mounting blocks fixedly connected to the side walls of the second connecting rod, the side walls of the two mounting blocks are rotatably connected to the second rotating rod, the side walls of the second rotating rod are fixedly connected to the push plate, the side walls of the second rotating rod are sleeved with a first torsion spring, and the two ends of the first torsion spring are respectively fixedly connected to the mounting blocks and the push plate.

[0011] Preferably, a cavity is provided in the disc, an electric push rod is fixedly connected to the inner wall of the cavity, and a movable end of the electric push rod passes through the inner wall of the cavity and is fixedly connected to the slider.

[0012] Preferably, an impact mechanism is installed on the assembly frame, and the impact mechanism includes an L-shaped plate fixedly connected to the inner wall of the assembly frame, the side wall of the L-shaped plate is slidably connected to a Y-shaped knocking rod, the upper end of the L-shaped plate is rotatably connected to a third rotating rod, the upper end of the third rotating rod is fixedly connected to the L-shaped rod, the upper end of the L-shaped rod is provided with a limiting groove, the limiting groove penetrates the L-shaped rod, one end of the Y-shaped knocking rod penetrates the inner wall of the L-shaped plate, the inner wall of the Y-shaped knocking rod is fixedly connected to a sliding rod, the side wall of the sliding rod is slidably connected to the inner wall of the limiting groove, the side wall of the third rotating rod is sleeved with a second torsion spring, and the two ends of the second torsion spring are respectively fixedly connected to the L-shaped plate and the L-shaped rod.

[0013] Preferably, the impact mechanism also includes an arc-shaped cavity opened in the sliding plug, the inner wall of the arc-shaped cavity is fixedly connected to an electromagnet, the side wall of the second connecting rod located in the arc-shaped cavity is fixedly connected to a magnetic plate, the side wall of the magnetic plate is slidingly connected to the inner wall of the arc-shaped cavity, a spring is fixedly connected between the inner wall of the arc-shaped cavity and the magnetic plate, and the electromagnet, motor and external power supply are electrically connected through wires.

[0014] Preferably, a rotating mechanism is installed in the test box, and the rotating mechanism includes a fourth rotating rod rotatably connected to the inner wall of the test box, the side wall of the fourth rotating rod is fixedly connected to the first bevel gear, one of the side walls of the rotating shaft is fixedly connected to the second bevel gear, the first bevel gear is meshingly connected to the second bevel gear, the side wall of the one-way bearing is fixedly connected to a driving wheel, one end of the fourth rotating rod passes through the side wall of the test box and is fixedly connected to a driven wheel, and the driving wheel is connected to the driven wheel through a synchronous belt.

[0015] Preferably, a drain pipe is fixedly connected to the side wall of the test box, and a valve is installed on the side wall of the drain pipe.

[0016] The present invention has the following beneficial effects: 1. By setting up the detection mechanism and the toggle mechanism, the motor is driven to rotate in the forward direction, so that the sealing performance of the ball valve body can be tested. In the detection process, the valve stem of the ball valve body is repeatedly rotated, so that the ball valve is alternately opened and closed, and the sealing performance of the ball valve body after the valve stem is frequently rotated is tested; 2. By setting the cavity and the electric push rod, the electric push rod is driven to extend or shorten, and the slider is driven to slide in the slide groove. When the slider is closer to the edge of the disc, the stroke of the sliding plug reciprocating in the pump air box will be larger, and more air will be pumped into the ball valve body, and the pressure in the ball valve body will be greater. On the contrary, the closer the slider is to the center of the disc, the smaller the stroke of the sliding plug reciprocating in the pump air box, and less air will be pumped into the ball valve body, and the pressure in the ball valve body will be smaller, so the sealing performance of the ball valve body under different pressures can be detected; 3. By setting a rotating mechanism, when a reverse current is supplied to the motor, the electromagnet will be powered off and lose its magnetism under the action of the diode in the circuit, and then the magnetic plate will slide on the inner wall of the arc cavity toward the electromagnet under the action of the spring, and then drive the second connecting rod to rotate 90 degrees, so that the push plate is vertically downward, and at this time the motor will drive the driving wheel to rotate synchronously through the one-way bearing, and then drive the driven wheel to rotate, drive the fourth rotating rod to rotate, thereby driving the first bevel gear to rotate, drive the second bevel gear to rotate, and then drive the rotating shaft to rotate, drive the ball valve body to rotate, so that the ball valve body is in a dynamic environment, so as to detect the sealing of the ball valve body in a dynamic environment; 4. By setting up the impact mechanism, during the detection of dynamic environment, the reciprocating movement of the second connecting rod will drive the push plate to move reciprocatingly. When the push plate moves to abut against the L-shaped rod, it will push the L-shaped rod to rotate. When the push plate is separated from the L-shaped rod, the L-shaped rod will rotate in the opposite direction and reset under the action of the second torsion spring. Then the L-shaped rod will drive the Y-shaped knocking rod to move back and forth to knock on the side wall of the ball valve body, simulating the sealing performance of the ball valve body after being hit during actual use, and further increasing the authenticity of the dynamic environment; 5. This device can detect the sealing performance of the ball valve body in static and dynamic environments, and can also adjust the pressure arbitrarily, with a wider range of applications and more diverse detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the three-dimensional structure of a ball valve sealing performance detection device proposed by the present invention; Figure 2 for Figure 1 A schematic cross-sectional view of the structure; Figure 3 for Figure 1 A schematic cross-sectional view of the structure; Figure 4 for Figure 3 A schematic diagram of the three-dimensional structure of the second connecting rod, the mounting block and the push plate; Figure 5 for Figure 4 A schematic diagram of the cross-sectional structure of the middle sliding plug; Figure 6 It is a schematic diagram of the three-dimensional structure of the L-shaped plate, the Y-shaped knocking rod and the L-shaped rod; Figure 7 for Figure 1 A schematic diagram of the structure enlargement at point A; Figure 8 for Figure 2 A schematic diagram of the structure at B in FIG. Fig. 9 for Figure 5 Schematic diagram of the enlarged structure at position C in FIG.

[0018] In the figure: 1, base; 2, ball valve body; 3, test box; 4, fixing frame; 5, fixing rod; 6, assembly frame; 7, rotating shaft; 8, test pipe; 9, pump air box; 10, sliding plug; 11, rotating joint; 12, air groove; 13, connecting pipe; 14, cross plate; 15, exhaust pipe; 16, one-way exhaust hole; 17, one-way air inlet hole; 18, first rotating rod; 19, disc; 20, sliding groove; 21, slider; 22, pin shaft; 23, first connecting rod; 24, second connecting rod; 25, connecting block; 26, electric machine; 27, one-way bearing; 29, mounting block; 30, second rotating rod; 31, push plate; 32, first torsion spring; 33, cavity; 34, electric push rod; 35, arc cavity; 36, electromagnet; 37, magnetic plate; 38, spring; 39, L-shaped plate; 40, Y-shaped knocking rod; 41, third rotating rod; 42, L-shaped rod; 43, limiting groove; 44, sliding rod; 45, second torsion spring; 46, fourth rotating rod; 47, first bevel gear; 48, second bevel gear; 49, driving wheel; 50, driven wheel; 51, drain pipe. DETAILED DESCRIPTION

[0019] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific implementation disclosed below.

[0020] Reference Figure 1 - Fig. 9 A ball valve sealing performance detection device comprises a base 1 and a ball valve body 2, wherein a test box 3 is fixedly connected to the upper end of the base 1, a fixing frame 4 is fixedly connected to the upper end of the base 1, a fixing rod 5 is fixedly connected to the top of the fixing frame 4, and an assembly frame 6 is fixedly connected to the lower end of the fixing rod 5; The detection mechanism includes two rotating shafts 7 symmetrically connected to the inner wall of the assembly frame 6, two test pipes 8 are fixedly connected to the side walls of the two rotating shafts 7 close to each other, a pump air box 9 is fixedly connected to the inner wall of the test box 3, a sliding plug 10 is sealingly and slidably connected to the inner wall of the pump air box 9, and two rotating joints 11 are symmetrically fixedly connected to the side wall of the assembly frame 6 through a bracket, an air groove 12 is opened in each of the two rotating shafts 7, one end of the air groove 12 is connected to the inside of the test pipe 8, and one end of the rotating shaft 7 passes through the side wall of the assembly frame 6 and is fixedly connected to the rotating joint 11, a connecting pipe 13 is fixedly connected to the inner wall of the pump air box 9, and the other end of the connecting pipe 13 is fixedly connected to one of the rotating joints 11; A driving mechanism is installed in the test box 3 .

[0021] The detection mechanism also includes a horizontal plate 14 fixedly connected to the side wall of the assembly frame 6, and an exhaust duct 15 is fixedly connected to the upper end of the horizontal plate 14. The exhaust duct 15 is arranged to penetrate the horizontal plate 14. A plurality of one-way exhaust holes 16 are opened on the inner wall of the exhaust duct 15. The one-way exhaust holes 16 only allow the air in the exhaust duct 15 to be discharged. A one-way air inlet hole 17 is opened on the top of the exhaust duct 15. The one-way air inlet hole 17 only allows external air to enter the exhaust duct 15.

[0022] The driving mechanism includes a first rotating rod 18 rotatably connected to the inner wall of the test box 3, a disc 19 is fixedly connected to the side wall of the first rotating rod 18, a slide groove 20 is opened on the side wall of the disc 19, a slider 21 is slidably connected to the inner wall of the slide groove 20, a pin 22 is fixedly connected to the side wall of the slider 21, a first connecting rod 23 is rotatably connected to the side wall of the pin 22, a second connecting rod 24 is rotatably connected to the side wall of the sliding plug 10, the other end of the first connecting rod 23 is rotatably connected to a connecting block 25, and the other end of the second connecting rod 24 passes through the side wall of the pump air box 9 and is rotatably connected to the connecting block 25.

[0023] The driving mechanism also includes a motor 26 fixedly connected to the upper end of the base 1 through a bracket, a one-way bearing 27 is fixedly connected to the output end of the motor 26, and one end of the first rotating rod 18 passes through the side wall of the test box 3 and is fixedly connected to the one-way bearing 27.

[0024] It should be noted that if Figure 3 As shown, when the valve stem of the ball valve body 2 rotates to the right, the ball valve body 2 will open, and when the valve stem rotates to the left, the ball valve body 2 will close. Therefore, when air is input into the ball valve body 2, the ball valve body 2 is in a closed state, and when air is extracted, the ball valve body 2 is in an open state.

[0025] It is worth mentioning that when the ball valve body 2 is not sealed enough and leaks occur, during the vacuum process, external air will enter the exhaust pipe 15 through the one-way air inlet hole 17, and then enter the pump air box 9 through the test pipe 8, the ball valve body 2 and the connecting pipe 13 to replenish the air.

[0026] A toggle mechanism is installed on the second connecting rod 24, and the toggle mechanism includes two mounting blocks 29 fixedly connected to the side walls of the second connecting rod 24, the side walls of the two mounting blocks 29 are rotatably connected to the second rotating rod 30, the side walls of the second rotating rod 30 are fixedly connected to the push plate 31, and the side walls of the second rotating rod 30 are sleeved with a first torsion spring 32, and the two ends of the first torsion spring 32 are respectively fixedly connected to the mounting blocks 29 and the push plate 31.

[0027] Further, the input pipe and the output pipe of the ball valve body 2 are connected to the two test pipes 8 respectively by bolts, and then water is injected into the test box 3, and then a positive current is passed to the motor 26, so that the motor 26 rotates forward, and the motor 26 drives the first rotating rod 18 to rotate clockwise (such as Figure 3As shown), the disc 19 is driven to rotate, and the disc 19 drives the second connecting rod 24 to move back and forth through the first connecting rod 23, thereby driving the sliding plug 10 to slide back and forth in a sealed manner, and then the sliding plug 10 inputs the air in the pump air box 9 into the ball valve body 2 through the connecting pipe 13 and the air groove 12, so as to perform a sealing performance test, and when inputting air, the second connecting rod 24 drives the push plate 31 to move right synchronously (as shown). Figure 3 As shown in the figure, when the push plate 31 moves to abut against the valve stem of the ball valve body 2, it will push the valve stem to rotate. At this time, the ball in the ball valve body 2 will rotate, and the ball valve body 2 will open. When the second connecting rod 24 moves to the left, the push plate 31 will move to the left. When the push plate 31 on the other side moves to abut against the valve stem of the ball valve body 2, it will push the valve stem to rotate in the opposite direction, and the ball valve body 2 will close. In this way, during the detection process, the ball valve body 2 will be in a state of repeated opening and closing, so that the sealing performance of the ball valve body 2 can be tested when it is repeatedly opened and closed and wears out. During the detection process, if the ball valve body 2 If the sealing is insufficient, some air will leak and enter the exhaust pipe 15 through the output pipe of the ball valve body 2, and then some air will be discharged through the multiple one-way exhaust holes 16. When the ball valve body 2 is turned on, a large amount of air will enter the exhaust pipe 15 and be discharged through the multiple one-way exhaust holes 16. Therefore, at this time, we only need to observe during the detection process. If a small amount of bubbles are continuously generated on the water surface in the test box 3, the sealing of the ball valve body 2 is insufficient. If only a large amount of bubbles are generated intermittently, it means that the ball valve body 2 is opened to exhaust and the sealing performance of the ball valve body 2 is good.

[0028] A cavity 33 is defined in the disc 19 , and an electric push rod 34 is fixedly connected to the inner wall of the cavity 33 . The movable end of the electric push rod 34 passes through the inner wall of the cavity 33 and is fixedly connected to the slider 21 .

[0029] Furthermore, the electric push rod 34 can be driven to extend or shorten, driving the slider 21 to slide in the slide groove 20. When the slider 21 is closer to the edge of the disk 19, the reciprocating sealing sliding stroke of the slide plug 10 in the pump air box 9 will be larger, and more air will be pumped into the ball valve body 2, and the pressure in the ball valve body 2 will be higher. On the contrary, the closer the slider 21 is to the center of the disk 19, the smaller the reciprocating sealing sliding stroke of the slide plug 10 in the pump air box 9 will be, and less air will be pumped into the ball valve body 2, and the pressure in the ball valve body 2 will be lower, so that the sealing performance of the ball valve body 2 under different pressures can be detected.

[0030] It should be noted that the first torsion spring 32 has a larger stiffness coefficient. When the slider 21 is located at the position closest to the center of the disk 19, the stroke is the smallest. At this time, the push plate 31 can just push the valve stem of the ball valve body 2 to fully open or close. When the stroke increases, after the push plate 31 pushes the valve stem into place, the push plate 31 can rotate to adapt to the increased stroke without causing motion interference. When the stroke is maximum, the rotation angle of the push plate 31 is maximum. At this time, the push plate 31 can still resist the valve stem of the ball valve body 2 and will not detach.

[0031] An impact mechanism is installed on the assembly frame 6, and the impact mechanism includes an L-shaped plate 39 fixedly connected to the inner wall of the assembly frame 6, a Y-shaped knocking rod 40 is slidably connected to the side wall of the L-shaped plate 39, a third rotating rod 41 is rotatably connected to the upper end of the L-shaped plate 39, an L-shaped rod 42 is fixedly connected to the upper end of the third rotating rod 41, a limiting groove 43 is provided at the upper end of the L-shaped rod 42, the limiting groove 43 penetrates the L-shaped rod 42, one end of the Y-shaped knocking rod 40 penetrates the inner wall of the L-shaped plate 39, a sliding rod 44 is fixedly connected to the inner wall of the Y-shaped knocking rod 40, the side wall of the sliding rod 44 is slidably connected to the inner wall of the limiting groove 43, a second torsion spring 45 is sleeved on the side wall of the third rotating rod 41, and the two ends of the second torsion spring 45 are respectively fixedly connected to the L-shaped plate 39 and the L-shaped rod 42.

[0032] The impact mechanism also includes an arc-shaped cavity 35 opened in the sliding plug 10, an electromagnet 36 is fixedly connected to the inner wall of the arc-shaped cavity 35, a magnetic plate 37 is fixedly connected to the side wall of the second connecting rod 24 located in the arc-shaped cavity 35, the side wall of the magnetic plate 37 is slidably connected to the inner wall of the arc-shaped cavity 35, a spring 38 is fixedly connected between the inner wall of the arc-shaped cavity 35 and the magnetic plate 37, and the electromagnet 36, the motor 26 and the external power supply are electrically connected through wires.

[0033] It should be noted that a diode is provided in the circuit formed by the electromagnet 36 and the motor 26. The diode can block the reverse current, and then when the reverse current flows into the motor 26, the electromagnet 36 will be powered off.

[0034] A rotating mechanism is installed in the test box 3, and the rotating mechanism includes a fourth rotating rod 46 rotatably connected to the inner wall of the test box 3, a first bevel gear 47 is fixedly connected to the side wall of the fourth rotating rod 46, a second bevel gear 48 is fixedly connected to the side wall of one of the rotating shafts 7, the first bevel gear 47 is meshingly connected with the second bevel gear 48, a driving wheel 49 is fixedly connected to the side wall of the one-way bearing 27, one end of the fourth rotating rod 46 passes through the side wall of the test box 3 and is fixedly connected to the driven wheel 50, and the driving wheel 49 is connected to the driven wheel 50 through a synchronous belt.

[0035] It should be noted that the output end of the motor 26 is fixedly connected to the inner ring of the one-way bearing 27, the first rotating rod 18 is fixedly connected to the inner ring of the one-way bearing 27, and the driving wheel 49 is fixedly connected to the side wall of the outer ring of the one-way bearing 27. Therefore, when the motor 26 rotates forward, it can drive the first rotating rod 18 to rotate, and the driving wheel 49 does not rotate at this time. When the motor 26 rotates reversely, it can drive the first rotating rod 18 and the driving wheel 49 to rotate at the same time.

[0036] Furthermore, when a reverse current is supplied to the motor 26, the electromagnet 36 will be de-energized and lose its magnetism under the action of the diode in the circuit, and then the magnetic plate 37 will slide on the inner wall of the arc cavity 35 toward the electromagnet 36 under the action of the spring 38, thereby driving the second connecting rod 24 to rotate 90 degrees, so that the push plate 31 is vertically downward, and at this time the motor 26 will drive the driving wheel 49 to rotate synchronously through the one-way bearing 27, and then drive the driven wheel 50 to rotate, drive the fourth rotating rod 46 to rotate, thereby driving the first bevel gear 47 to rotate, drive the second bevel gear 48 to rotate, and then drive the rotating shaft 7 to rotate, drive the ball valve body 2 to rotate, so that the ball valve body 2 is in a dynamic environment, and the sealing of the ball valve body 2 is tested in a dynamic environment.

[0037] It is worth mentioning that during the detection of dynamic environments, the reciprocating movement of the second connecting rod 24 will drive the push plate 31 to move reciprocally. When the push plate 31 moves to abut against the L-shaped rod 42, it will push the L-shaped rod 42 to rotate. When the push plate 31 is separated from the L-shaped rod 42, the L-shaped rod 42 will rotate in the opposite direction and reset under the action of the second torsion spring 45, and then the L-shaped rod 42 will drive the Y-shaped knocking rod 40 to move back and forth, knocking on the side wall of the ball valve body 2, simulating the sealing performance of the ball valve body 2 after being hit during actual use, thereby further increasing the authenticity of the dynamic environment.

[0038] A drain pipe 51 is fixedly connected to the side wall of the test box 3 , and a valve is installed on the side wall of the drain pipe 51 . By opening the valve, water in the test box 3 can be discharged through the drain pipe 51 .

[0039] In the present invention, the input pipe and the output pipe of the ball valve body 2 are connected to the two test pipes 8 by bolts, and then water is injected into the test box 3. Then, a positive current is passed through the motor 26 to make the motor 26 rotate forward, and the motor 26 drives the first rotating rod 18 to rotate clockwise (such as Figure 3 As shown), the disc 19 is driven to rotate, and the disc 19 drives the second connecting rod 24 to move back and forth through the first connecting rod 23, thereby driving the sliding plug 10 to slide back and forth in a sealed manner, and then the sliding plug 10 inputs the air in the pump air box 9 into the ball valve body 2 through the connecting pipe 13 and the air groove 12, so as to perform a sealing performance test, and when inputting air, the second connecting rod 24 drives the push plate 31 to move right synchronously (as shown). Figure 3As shown in the figure, when the push plate 31 moves to abut against the valve stem of the ball valve body 2, it will push the valve stem to rotate. At this time, the ball in the ball valve body 2 will rotate, and the ball valve body 2 will open. When the second connecting rod 24 moves to the left, the push plate 31 will move to the left. When the push plate 31 on the other side moves to abut against the valve stem of the ball valve body 2, it will push the valve stem to rotate in the opposite direction, and the ball valve body 2 will close. In this way, during the detection process, the ball valve body 2 will be in a state of repeated opening and closing, so that the sealing performance of the ball valve body 2 can be tested when it is repeatedly opened and closed and wears out. During the detection process, if the ball valve body 2 If the sealing is insufficient, some air will leak and enter the exhaust pipe 15 through the output pipe of the ball valve body 2, and then some air will be discharged through the multiple one-way exhaust holes 16. When the ball valve body 2 is turned on, a large amount of air will enter the exhaust pipe 15 and be discharged through the multiple one-way exhaust holes 16. Therefore, at this time, we only need to observe during the detection process. If a small amount of bubbles are continuously generated on the water surface in the test box 3, the sealing of the ball valve body 2 is insufficient. If only a large amount of bubbles are generated intermittently, it means that the ball valve body 2 is opened to exhaust and the sealing performance of the ball valve body 2 is good.

[0040] In addition, the electric push rod 34 can be driven to extend or shorten, driving the slider 21 to slide in the slide groove 20. When the slider 21 is closer to the edge of the disk 19, the reciprocating sealing sliding stroke of the slide plug 10 in the pump air box 9 will be larger, and more air will be pumped into the ball valve body 2, and the pressure in the ball valve body 2 will be higher. On the contrary, the closer the slider 21 is to the center of the disk 19, the smaller the reciprocating sealing sliding stroke of the slide plug 10 in the pump air box 9 will be, and less air will be pumped into the ball valve body 2, and the pressure in the ball valve body 2 will be smaller, so the sealing performance of the ball valve body 2 under different pressures can be detected.

[0041] When reverse current is passed through the motor 26, under the action of the diode in the circuit, the electromagnet 36 will be de-energized and lose its magnetism, and then under the action of the spring 38, the magnetic plate 37 will slide on the inner wall of the arc cavity 35 toward the electromagnet 36, thereby driving the second connecting rod 24 to rotate 90 degrees, so that the push plate 31 is vertically downward, and at this time, the motor 26 will drive the driving wheel 49 to rotate synchronously through the one-way bearing 27, and then drive the driven wheel 50 to rotate, drive the fourth rotating rod 46 to rotate, thereby driving the first bevel gear 47 to rotate, drive the second bevel gear 48 to rotate, and then drive the rotating shaft 7 to rotate, drive the ball valve body 2 to rotate, so that the ball valve body 2 is in a dynamic environment, so as to detect the sealing of the ball valve body 2 in a dynamic environment.

[0042] During the detection of dynamic environment, the reciprocating movement of the second connecting rod 24 will drive the push plate 31 to move reciprocally. When the push plate 31 moves to abut against the L-shaped rod 42, it will push the L-shaped rod 42 to rotate. When the push plate 31 is separated from the L-shaped rod 42, the L-shaped rod 42 will rotate in the opposite direction and reset under the action of the second torsion spring 45. Then the L-shaped rod 42 will drive the Y-shaped knocking rod 40 to move back and forth, knocking on the side wall of the ball valve body 2, simulating the sealing performance of the ball valve body 2 after being hit during actual use, thereby further increasing the authenticity of the dynamic environment.

[0043] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A ball valve sealing performance detection device, characterized in that: include: A base (1) and a ball valve body (2), wherein the upper end of the base (1) is fixedly connected to a test box (3), the upper end of the base (1) is fixedly connected to a fixing frame (4), the top of the fixing frame (4) is fixedly connected to a fixing rod (5), and the lower end of the fixing rod (5) is fixedly connected to an assembly frame (6); A detection mechanism, the detection mechanism comprising two rotating shafts (7) symmetrically connected to the inner wall of an assembly frame (6), two test pipes (8) being fixedly connected to the side walls of the two rotating shafts (7) close to each other, a pump air box (9) being fixedly connected to the inner wall of the test box (3), a sliding plug (10) being sealingly and slidably connected to the inner wall of the pump air box (9), two rotating joints (11) being symmetrically and fixedly connected to the side wall of the assembly frame (6) through a bracket, an air groove (12) being provided in each of the two rotating shafts (7), one end of the air groove (12) being connected to the inside of the test pipe (8), and one end of the rotating shaft (7) passing through the side wall of the assembly frame (6) and being fixedly connected to the rotating joint (11), a connecting pipe (13) being fixedly connected to the inner wall of the pump air box (9), and the other end of the connecting pipe (13) being fixedly connected to one of the rotating joints (11); A driving mechanism is installed in the test box (3), the driving mechanism comprising a first rotating rod (18) rotatably connected to the inner wall of the test box (3), a disc (19) fixedly connected to the side wall of the first rotating rod (18), a sliding groove (20) being provided on the side wall of the disc (19), a slider (21) being slidably connected to the inner wall of the sliding groove (20), a pin (22) being fixedly connected to the side wall of the slider (21), a first connecting rod (23) being rotatably connected to the side wall of the pin (22), a second connecting rod (24) being rotatably connected to the side wall of the sliding plug (10), the other end of the first connecting rod (23) being rotatably connected to a connecting block (25), and the other end of the second connecting rod (24) penetrating the side wall of the pump air box (9) and being rotatably connected to the connecting block (25); The second connecting rod (24) is provided with a toggle mechanism, the toggle mechanism comprising two mounting blocks (29) fixedly connected to the side walls of the second connecting rod (24), the side walls of the two mounting blocks (29) being rotatably connected to a second rotating rod (30), the side walls of the second rotating rod (30) being fixedly connected to a push plate (31), the side walls of the second rotating rod (30) being sleeved with a first torsion spring (32), the two ends of the first torsion spring (32) being fixedly connected to the mounting blocks (29) and the push plate (31), respectively.

2. A ball valve sealing performance detection device according to claim 1, characterized in that: in: The detection mechanism further comprises a transverse plate (14) fixedly connected to a side wall of the assembly frame (6); an exhaust duct (15) is fixedly connected to the upper end of the transverse plate (14); the exhaust duct (15) passes through the transverse plate (14); a plurality of one-way exhaust holes (16) are provided on the inner wall of the exhaust duct (15); and a one-way air inlet hole (17) is provided on the top of the exhaust duct (15).

3. A ball valve sealing performance detection device according to claim 2, characterized in that: in: The driving mechanism further comprises a motor (26) fixedly connected to the upper end of the base (1) via a bracket, the output end of the motor (26) being fixedly connected to a one-way bearing (27), and one end of the first rotating rod (18) passing through the side wall of the test box (3) and being fixedly connected to the one-way bearing (27).

4. A ball valve sealing performance detection device according to claim 3, characterized in that: in: A cavity (33) is provided in the disc (19), an electric push rod (34) is fixedly connected to the inner wall of the cavity (33), and a movable end of the electric push rod (34) passes through the inner wall of the cavity (33) and is fixedly connected to the slider (21).

5. A ball valve sealing performance detection device according to claim 4, characterized in that: in: The assembly frame (6) is provided with an impact mechanism, the impact mechanism comprising an L-shaped plate (39) fixedly connected to the inner wall of the assembly frame (6), a Y-shaped knocking rod (40) being slidably connected to the side wall of the L-shaped plate (39), a third rotating rod (41) being rotatably connected to the upper end of the L-shaped plate (39), an L-shaped rod (42) being fixedly connected to the upper end of the third rotating rod (41), a limiting groove (43) being provided at the upper end of the L-shaped rod (42), the limiting groove (43) being arranged through the L-shaped rod (42), one end of the Y-shaped knocking rod (40) being arranged through the inner wall of the L-shaped plate (39), a sliding rod (44) being fixedly connected to the inner wall of the Y-shaped knocking rod (40), the side wall of the sliding rod (44) being slidably connected to the inner wall of the limiting groove (43), a second torsion spring (45) being sleeved on the side wall of the third rotating rod (41), the two ends of the second torsion spring (45) being fixedly connected to the L-shaped plate (39) and the L-shaped rod (42) respectively.

6. A ball valve sealing performance detection device according to claim 5, characterized in that: in: The impact mechanism further comprises an arc-shaped cavity (35) formed in the sliding plug (10); an electromagnet (36) is fixedly connected to the inner wall of the arc-shaped cavity (35); a magnetic plate (37) is fixedly connected to the side wall of the second connecting rod (24) located in the arc-shaped cavity (35); the side wall of the magnetic plate (37) is slidably connected to the inner wall of the arc-shaped cavity (35); a spring (38) is fixedly connected between the inner wall of the arc-shaped cavity (35) and the magnetic plate (37); and the electromagnet (36), the motor (26) and the external power supply are electrically connected via a wire.

7. A ball valve sealing performance detection device according to claim 6, characterized in that: in: A rotating mechanism is installed in the test box (3), the rotating mechanism comprising a fourth rotating rod (46) rotatably connected to the inner wall of the test box (3), a first bevel gear (47) being fixedly connected to the side wall of the fourth rotating rod (46), a second bevel gear (48) being fixedly connected to the side wall of one of the rotating shafts (7), the first bevel gear (47) being meshingly connected to the second bevel gear (48), a driving wheel (49) being fixedly connected to the side wall of the one-way bearing (27), one end of the fourth rotating rod (46) passing through the side wall of the test box (3) and being fixedly connected to a driven wheel (50), the driving wheel (49) being connected to the driven wheel (50) via a synchronous belt.

8. A ball valve sealing performance detection device according to claim 1, characterized in that: in: A drainage pipe (51) is fixedly connected to the side wall of the test box (3), and a valve is installed on the side wall of the drainage pipe (51).

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