Ball valve with filtering structure and using method

Abstract

The invention relates to the technical field of ball valve filtering, in particular to a ball valve with a filtering structure and a using method.The ball valve comprises a ball valve shell, a roll-out groove is formed in the outer side surface of the ball valve shell, a bottom limiting ring is fixedly connected to the bottom surface of the ball valve shell, and a top limiting groove is formed in the top surface of the ball valve shell; a pipeline connecting groove is formed in the surface of the outer side of the ball valve shell, fluid pipelines are fixedly connected to the two ends of the ball valve shell and fixedly connected with the pipeline connecting groove, connecting flanges are fixedly connected to the surfaces of the outer sides of the fluid pipelines, and an on-off ball core mechanism is arranged on the surface of the inner side of the ball valve shell. A filtering mechanism is arranged on the surface of the top of the ball valve shell, a sampling mechanism is arranged on the surface of the outer side of the fluid pipeline, the main shaft is rotated forwards and reversely to control the internal circulation cross section area so as to control the flow speed, and the internal rotating filter element and the internal fixed filter element are rotated out of the ball valve so that the cleaning effect can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of ball valve filtration, in particular to a ball valve with a filtration structure and a use method thereof. Background Art

[0002] The ball valve is an efficient and convenient valve type. It is widely used in various types of piping systems due to its compact structure and good sealing performance. Its main feature is the small sealing contact surface between the ball and the valve seat, which makes the ball valve have low friction when opening and closing, flexible operation and long service life.

[0003] The ball valve in the prior art is usually connected to a pipeline to control the opening and closing of the pipeline.

[0004] The prior art (publication number: CN117889252A) discloses a clean filter ball valve, which relates to the field of valve control technology, including a ball valve body, a first connecting pipe, a second connecting pipe, a valve stem, a valve ball and a filter cleaning mechanism, the valve stem penetrates into the interior of the ball valve body and is fixedly connected to the valve ball, the sleeve plate is integrally connected with a directional arrow that slides on the angle disc frame, the first connecting pipe and the second connecting pipe are sealingly threadedly connected on both sides of the ball valve body, the filter cleaning mechanism includes a filter screen fixedly installed on the symmetrical inner pipe walls of the first connecting pipe and the second connecting pipe, a spring is welded between the force plate and the slide plate, and cleaning cones that can be penetrated and cleaned are provided at the filter notches of the filter screen corresponding to the slide plate, the lower pipes of the first connecting pipe and the second connecting pipe are symmetrically provided with cleaning holes, and a fixed half plate and a sliding half plate that are fixedly connected are provided in the cleaning holes. In the above-mentioned equipment, solid impurities on the filter screen are pushed out for cleaning through a cleaning cone, which causes the holes on the filter screen to adapt to the distribution of the cleaning cone, and the adaptability is poor. In addition to the filter screen, a filter element is also used in the filtration process. For example, activated carbon adsorption is difficult to enter due to the long filter element, and the cleaning cone and the filter screen are always difficult to check inside the valve, making it inconvenient to detect and maintain the cleanliness of the filter screen or filter element.

[0005] In view of this, we propose a ball valve with a filtering structure and a method of use. Summary of the invention

[0006] The object of the present invention is to provide a ball valve with a filtering structure and a method for using the same, so as to solve the problem raised in the above background technology that in the prior art, a ball valve usually uses a filter element or a filter screen when filtering. Since the filter element or the filter screen is installed inside the ball valve, it is not convenient to maintain and replace it, and the existing filtering ball valve is inconvenient to adjust the filtering speed, and it is difficult to obtain the required filtering speed. To achieve the above object, the present invention provides the following technical scheme: a ball valve with a filtering structure and a method for using the same, comprising a ball valve housing, the outer surface of the ball valve housing is provided with a roll-out groove, the bottom surface of the ball valve housing is fixedly connected with a bottom stop ring, the top surface of the ball valve housing is provided with a top stop groove, the outer surface of the ball valve housing is provided with a pipeline connection groove, the two ends of the ball valve housing are fixedly connected with a fluid pipeline, and the fluid pipeline is fixedly connected to the pipeline connection groove, the outer surface of the fluid pipeline is fixedly connected with a connecting flange, the inner surface of the ball valve housing is provided with an on-off ball core mechanism, the top surface of the ball valve housing is provided with a filtering mechanism, and the outer surface of the fluid pipeline is provided with a sampling mechanism.

[0007] Preferably, the on-off ball core mechanism includes a ball core shell, the ball core shell is slidably connected to the inner surface of the ball valve shell, the bottom surface of the ball core shell is fixedly connected to a bottom sliding ring, the outer surface of the ball core shell is provided with a fluid passing groove, and the inner surface of the fluid passing groove is fixedly connected to a groove stopper.

[0008] Preferably, the number of the core shells is two, the bottom sliding ring is slidably connected to the inner surface of the bottom limiting ring, and the groove stopper is slidably connected to the fluid pipeline.

[0009] Preferably, the filter mechanism includes an installation sliding seat, the installation sliding seat is slidably connected to the top surface of the ball valve housing, the inner surface of the installation sliding seat is rotatably connected to a rotating main shaft, the outer surface of the rotating main shaft is rotatably connected to the filter installation housing, both ends of the rotating main shaft are fixedly connected to rotation limiting protrusions, the outer surface of the rotation limiting protrusion is slidably connected to a sliding handle, the outer surface of the rotating main shaft is rotatably connected to a one-way rotating frame, the inner surface of the one-way rotating frame is provided with a ratchet groove, the bottom surface of the one-way rotating frame is rotatably connected to a connecting shaft, the outer surface of the rotating main shaft is fixedly connected to a ratchet rotating disk, the outer surface of the ratchet rotating disk is fixedly connected to a ratchet reset spring, the outer surface of the ratchet rotating disk is rotatably connected to a control ratchet, the outer surface of the rotating main shaft is fixedly connected to a driving gear, the outer surface of the connecting shaft is rotatably connected to a rotating housing, the inner surface of the rotating housing is fixedly connected to a rotating filter element, the inner surface of the filter installation housing is snap-connected to a fixed housing, and the inner surface of the fixed housing is fixedly connected to a fixed filter element.

[0010] Preferably, the mounting sliding seat is slidably connected to the inner surface of the top limit groove, the two ends of the filter mounting shell are slidably connected to the ball core shell, the filter mounting shell is slidably connected to the roll-out groove, the number of the rotation limiting protrusions and the sliding handles are both two, and the two rotation limiting protrusions and the two sliding handles are symmetrically distributed at the two ends of the rotating main shaft, the number of the one-way rotating frame and the ratchet rotating disk are both two, and the two one-way rotating frames and the two ratchet rotating disks are symmetrically distributed at the two ends of the filter mounting shell, the number of the control ratchets on each ratchet rotating disk is three, and the three control ratchets are annularly distributed around the ratchet rotating disk, the two ends of the ratchet return spring are respectively fixedly connected to the ratchet rotating disk and the control ratchet, the control ratchet is meshed with the ratchet groove, the number of the driving gear and the rotating shell are both two, and the two driving gears and the two rotating shells are symmetrically distributed at the two ends of the fixed shell, the two ends of the connecting shaft are rotatably connected to the rotating shell, and the outer surface of the rotating shell is provided with a gear groove that meshes with the driving gear.

[0011] Preferably, the sampling mechanism includes a fixed bracket, which is fixedly connected to the outer surface of the fluid pipeline, the inner surface of the fixed bracket is slidably connected with a pushing bracket, the bottom surface of the pushing bracket is fixedly connected with a driven moving bracket, the outer surface of the driven moving bracket is fixedly connected with a test paper pushing plate, the outer surface of the pushing bracket is fixedly connected with a trigger rod, the inner surface of the pushing bracket is slidably connected with an adjustable connecting arm, the top surface of the fluid pipeline is fixedly connected with a sample bracket, the top surface of the sample bracket is fixedly connected with a sample cylinder, the two ends of the sample cylinder on one side of the sample bracket are fixedly connected with a branch pipeline, the bottom surface of the sample cylinder is fixedly connected with an opening and closing valve, the inner surface of the opening and closing valve is fixedly connected with a normally closed spring, one end of the normally closed spring is fixedly connected with a blocking block, the bottom surface of the opening and closing valve is fixedly connected with an output pipeline, the top surface of the fluid pipeline is fixedly connected with a sample platform, the outer surface of the sample platform is fixedly connected with a test paper storage cabinet, and the outer surface of the test paper storage cabinet is fixedly connected with a movable limiting rod.

[0012] Preferably, the number of the pushing racks is two, and the two pushing racks are symmetrically distributed with the central axis of the sample holder as the axis of symmetry, the adjustable connecting arm is slidably connected to the outer surface of the sliding handle, the number of the sample tubes is two, the branch pipe passes through the inner surface of the fluid pipe and is fixedly connected to its inner wall, the trigger rod is slidably connected to one end of the blocking block, the test paper push plate passes through the test paper storage cabinet and is slidably connected to its inner surface, and the output pipe passes through the inner surface of the sample platform.

[0013] A method for using a ball valve with a filtering structure comprises the following steps:

[0014] S1. The ball valve housing is connected to the pipeline required for controlling on-off and filtering through the fluid pipeline and the connecting flange. The fluid flows into the ball valve housing through the fluid pipeline and the pipeline connecting groove. If the on-off ball core mechanism is opened at this time, the fluid continues to flow in through the groove and the rotating filter element and the fixed filter element for filtering, and finally flows out from the fluid pipeline at the other end;

[0015] S2. Grip the sliding handles at both ends to drive the rotating main shaft to rotate at the top of the ball valve housing to change the position, thereby driving the complete ball core composed of the ball core housing, the filter installation housing and the internal components to rotate inside the ball valve housing. When the pipe connection groove is aligned with the fluid passing groove, the flow of the fluid is not hindered. After rotating ninety degrees, the pipe connection groove is no longer aligned with the fluid passing groove. At this time, the fluid cannot pass through the ball core housing to block the effect. When the ball core housing and the filter installation housing are rotated forty-five degrees, the aligned turn-out groove is used to turn the filter installation housing out from the inside, and at this time, the pipe connection groove is partially aligned with the fluid passing groove. The groove block is used to block the gap between the pipe connection groove and the fluid passing groove to prevent the fluid from flowing out when the filter installation housing is turned out.

[0016] S3, by turning the sliding handle, the rotating main shaft itself is driven to rotate, and the position remains unchanged at this time, and the on-off state of the ball core shell will not be changed. The rotating main shaft can only rotate in one direction in the one-way rotating frame through the ratchet rotating disk. When the rotating main shaft rotates counterclockwise, the rotation of the rotating main shaft in the one-way rotating frame is not restricted, and the rotating shell will be driven to rotate through the subsequent driving gear. The rotating shell is installed on both sides of the fixed shell, and the rotating filter element and the fixed filter element are installed in the groove respectively. The position and angle of the fixed shell are fixed. When the rotating shell rotates, the rotating filter element The core and the fixed filter element are misaligned and blocked with each other, thereby changing the cross-sectional area that the fluid can pass through when passing through the rotating filter element and the fixed filter element, and realizing the control of the passing speed of the filtered fluid when the flow rate is constant. When the rotating main shaft rotates clockwise, the rotating main shaft will be stuck by the control pawl and ratchet groove in the one-way rotating frame, which is equivalent to the rotating main shaft and the one-way rotating frame being connected as a whole. Rotating the rotating main shaft will rotate the one-way rotating frame, so that it rotates out of the ball core shell and rotates to the outside of the ball valve shell through the rotation groove, so as to facilitate the replacement and maintenance of the rotating filter element and the fixed filter element;

[0017] S4. The adjustable connecting arm is extended and inserted into the surface of the rotating main shaft. At this time, pushing the sliding handle will drive the adjustable connecting arm and the pushing frame to move inward on the fixed bracket, and drive the trigger rod and the driven moving frame to move toward the sample tube. The trigger rod will push the blocking block so that it no longer blocks the opening and closing valve. At this time, the fluid inside the sample tube flows into the sample platform through the output pipe. The driven moving frame will drive the test paper push plate to push into the test paper storage cabinet. Litmus papers are stacked in the test paper storage cabinet. The test paper push plate will push the litmus paper at the bottom into the sample platform. The blocking block closes the opening and closing valve again under the push of the normally closed spring, completing a working cycle.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] In the present invention, through the cooperation of the on-off ball core mechanism and the filtering mechanism, a complete ball core is formed by using a ball core shell and a filtering installation shell. The position of the fluid passing groove on the ball core is changed by rotating the ball core externally to change whether it is aligned with the pipeline connecting groove, thereby controlling the on-off effect of the ball valve on the fluid, and the groove block will block the fluid from passing through the groove, so that the ball core can also play a complete on-off control and filtering role on the fluid when it is not fully rotated to the limit position.

[0020] In the present invention, through the setting of the filtering mechanism, the fluid passing through the inside of the ball valve is filtered by double-layer filtration using a rotating filter element and a fixed filter element, and the flow rate can be controlled by controlling the internal flow cross-sectional area by rotating the main shaft forward and reversely, and the internal rotating filter element and the fixed filter element can be rotated outside the ball valve for easy cleaning.

[0021] In the present invention, through the setting of the sampling mechanism, two sample cylinders, one of which is connected to the fluid pipeline through a branch pipeline, is used to divert a part of the filtered fluid, and the other sample cylinder is used to store sample reagents for comparison, which can be used to detect and compare whether the pH condition of the current fluid is qualified. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic side view of the overall structure of the present invention;

[0023] Figure 2 It is a left side schematic diagram of the overall structure of the present invention;

[0024] Figure 3 It is an exploded view of the ball valve housing and the ball core housing of the present invention;

[0025] Figure 4 It is an exploded view of the ball core housing and the filter installation housing of the present invention;

[0026] Figure 5 An exploded view of the filter installation housing, the rotating housing and the fixed housing of the present invention;

[0027] Figure 6 It is an exploded view of the rotating main shaft, the one-way rotating frame and the ratchet rotating disk of the present invention;

[0028] Figure 7 It is an exploded view of the rotating housing and the fixed housing of the present invention;

[0029] Figure 8 It is a schematic diagram of the structure of the ball core housing and the filter installation housing cooperating with each other in the present invention;

[0030] Fig. 9 It is a schematic diagram of the structure of the mutual cooperation of the components of the sampling mechanism of the present invention;

[0031] Fig.10 It is a schematic diagram of the structure of the sample cylinder, the opening and closing valve, the output pipeline and the sample platform cooperating with each other in the present invention;

[0032] Fig.11 It is a schematic diagram of the structure of the sample platform, the test paper storage cabinet and the test paper push plate cooperating with each other in the present invention;

[0033] Fig.12 It is a schematic diagram of the structure of the push frame, the driven moving frame and the trigger rod cooperating with each other in the present invention;

[0034] Fig.13 For the present invention Fig.12 Enlarged view of point A in the middle.

[0035] In the figure: 1, ball valve housing; 11, roll-out groove; 12, bottom limit ring; 13, top limit groove; 14, pipeline connection groove; 2, fluid pipeline; 3, connecting flange; 4, on-off ball core mechanism; 41, ball core housing; 42, bottom sliding ring; 43, fluid passing groove; 431, groove stopper; 5, filter mechanism; 51, mounting sliding seat; 52, rotating main shaft; 521, filter mounting housing; 53, rotation limiting protrusion; 531, sliding handle; 54, one-way rotating frame; 541, ratchet groove; 542, connecting shaft; 55, ratchet rotating disk; 551, ratchet reset spring Spring; 552, control pawl; 56, driving gear; 57, rotating housing; 571, rotating filter element; 58, fixed housing; 581, fixed filter element; 6, sampling mechanism; 61, fixed bracket; 62, pushing bracket; 621, driven moving bracket; 6211, test paper push plate; 622, trigger rod; 63, adjustable connecting arm; 65, sample bracket; 66, sample tube; 661, branch pipe; 662, opening and closing valve; 6621, normally closed spring; 6622, blocking block; 663, output pipe; 67, sample platform; 68, test paper storage cabinet; 681, moving limit rod. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technical personnel in this field without creative work are within the scope of protection of the present invention.

[0037] See also Figures 1 to 13The present invention provides a technical solution: a ball valve with a filtering structure and a method of use, comprising a ball valve housing 1, an outer surface of the ball valve housing 1 is provided with a roll-out groove 11, a bottom surface of the ball valve housing 1 is fixedly connected with a bottom limit ring 12, a top surface of the ball valve housing 1 is provided with a top limit groove 13, an outer surface of the ball valve housing 1 is provided with a pipeline connecting groove 14, both ends of the ball valve housing 1 are fixedly connected with a fluid pipeline 2, and the fluid pipeline 2 is fixedly connected to the pipeline connecting groove 14, a connecting flange 3 is fixedly connected to the outer surface of the fluid pipeline 2, and the ball valve housing 1 is provided with an on-off ball core mechanism 4, a top surface of the ball valve housing 1 is provided with a filtering mechanism 5, and an outer surface of the fluid pipeline 2 is provided with a sampling mechanism 6. The interior of the ball valve housing 1 is used to install the ball core, which is connected to the pipeline required to control on-off and filtering through the fluid pipeline 2 and the connecting flange 3. The roll-out groove 11 is used to roll out the filtering mechanism 5 from the inside for replacing and maintaining the filter element. The bottom limit ring 12 is used to install the ball core housing 41 to limit the moving path and prevent it from falling off from the inside of the ball valve housing 1. The top limit groove 13 is used to limit the moving path of the sliding seat 51.

[0038] The on-off ball core mechanism 4 includes a ball core shell 41, which is slidably connected to the inner surface of the ball valve shell 1, and a bottom sliding ring 42 is fixedly connected to the bottom surface of the ball core shell 41. A fluid passing groove 43 is opened on the outer surface of the ball core shell 41, and a groove stopper 431 is fixedly connected to the inner surface of the fluid passing groove 43. Through the setting of the on-off ball core mechanism 4, during use, the symmetrical ball core shell 41 and the filter mechanism 5 form a complete ball core, and the bottom sliding ring 42 is sleeved inside the bottom limiting ring 12 to limit the moving path of the ball core shell 41 and prevent it from falling off from the inside of the ball valve shell 1. A fluid passing groove 43 is provided. When the fluid passing groove 43 is aligned with the pipe connecting groove 14, the fluid can pass through the fluid pipe 2, the pipe connecting groove 14, the fluid passing groove 43 and the filtering mechanism 5 and flow out from the fluid pipe 2 at the other end. When they are not aligned, the two sections of the fluid pipe 2 are blocked to control the flow. Since the filtering mechanism 5 needs to be aligned with the turn-out groove 11 when replacing the maintenance filter element, part of the fluid passing groove 43 is connected to the pipe connecting groove 14 at this time. By adding a groove stopper 431 to the fluid passing groove 43, this part is blocked, so that when the maintenance filter element is replaced, the valve can still be closed to prevent water from passing.

[0039] There are two ball core shells 41, the bottom sliding ring 42 is slidably connected to the inner surface of the bottom limit ring 12, the groove block 431 is slidably connected to the fluid pipeline 2, and the symmetrical ball core shells 41 are clamped on both sides of the filter mechanism 5, so that the filter mechanism 5 can have a larger size to match the pipeline connection groove 14, and when the filter mechanism 5 rotates, it can drive the ball core shell 41 to rotate to control whether the fluid passes through the groove 43 and the pipeline connection groove 14 to control the passage of the fluid. The groove block 431 is used to block the gap between the fluid passing through the groove 43 and the pipeline connection groove 14 when the ball core shell 41 rotates to the middle position.

[0040] The filter mechanism 5 includes a mounting sliding seat 51, which is slidably connected to the top surface of the ball valve housing 1, the inner surface of the mounting sliding seat 51 is rotatably connected to a rotating main shaft 52, the outer surface of the rotating main shaft 52 is rotatably connected to a filter mounting housing 521, both ends of the rotating main shaft 52 are fixedly connected to rotation limiting protrusions 53, the outer surface of the rotation limiting protrusion 53 is slidably connected to a sliding handle 531, the outer surface of the rotating main shaft 52 is rotatably connected to a one-way rotating frame 54, the inner surface of the one-way rotating frame 54 is provided with a ratchet groove 541, the bottom surface of the one-way rotating frame 54 is rotatably connected to a connecting shaft 542, the outer surface of the rotating main shaft 52 is fixedly connected to a ratchet rotating disk 55, and the outer surface of the ratchet rotating disk 55 is fixedly connected to The outer surface of the pawl reset spring 551, the outer surface of the pawl rotating disk 55 is rotatably connected with a control pawl 552, the outer surface of the rotating main shaft 52 is fixedly connected with a driving gear 56, the outer surface of the connecting shaft 542 is rotatably connected with a rotating shell 57, the inner surface of the rotating shell 57 is fixedly connected with a rotating filter element 571, the inner surface of the filter installation shell 521 is snap-connected with a fixed shell 58, and the inner surface of the fixed shell 58 is fixedly connected with a fixed filter element 581. Through the setting of the filtering mechanism 5, during use, the installation sliding seats 51 installed at both ends of the rotating main shaft 52 can slide in the top limit groove 13, thereby driving the rotating main shaft 52 to rotate inside the ball valve housing 1, and the rotating main shaft 52 is connected to the filter installation shell 521 at the rotating During the movement, the filter installation shell 521 is also driven to rotate, and the ball core shell 41 installed on both sides also drives the on-off ball core mechanism 4 to rotate to control the fluid on and off. The rotating main shaft 52 itself can also rotate, but due to the arrangement of the one-way rotating frame 54 and the pawl rotating disk 55, the rotating main shaft 52 can only rotate in one direction on the one-way rotating frame 54. When the rotating main shaft 52 rotates counterclockwise, the control pawl 552 on the pawl rotating disk 55 will be pressed into the groove on the pawl rotating disk 55. At this time, the rotating main shaft 52 rotates smoothly and drives the driving gear 56 to rotate. The driving gear 56 is engaged with the groove on the outer side of the rotating shell 57, and the rotating shell 57 is installed on the connecting shaft 542. At this time, the rotating shell 57 and the rotating filter element 571 on its surface rotate When the filter is rotated, the filter element 521 is moved, but the fixed housing 58 in the filter mounting housing 521 does not rotate. The filter elements are installed in the grooves opened on the surfaces of the rotating housing 57 and the fixed housing 58. When the rotation is performed, the position of the grooves also rotates. When the grooves are aligned, the cross-sectional area through which the fluid can pass is the largest. When the grooves are misaligned, a part of the cross-sectional area will be blocked, thereby reducing the cross-sectional area when the fluid passes. In this way, when the flow rate is constant, the speed of the filtered fluid passing can be controlled by controlling the size of the internal cross-sectional area of ​​the filter mechanism 5. When the rotating main shaft 52 rotates clockwise, the control pawl 552 will be reset by the pawl reset spring 551 and bounce out of the groove of the pawl rotating disk 55 and mesh with the ratchet groove 541. At this time, the direction of rotation of the control pawl 552 is blocked and cannot be rotated, and it will be stuck by the ratchet groove 541.At this time, the rotating main shaft 52 cannot rotate inside the one-way rotating frame 54, which is equivalent to the rotating main shaft 52 and the one-way rotating frame 54 being connected as one. In this way, when the rotating main shaft 52 is rotated clockwise, the one-way rotating frame 54 will be driven to rotate around the rotating main shaft 52, so that it can rotate out of the ball core shell 41 and rotate to the outside of the ball valve shell 1 through the rotation groove 11, and rotate the filter installation shell 521, the rotating shell 57 and the fixed shell 58 to the outside of the ball valve shell 1 through the connecting shaft 542 on its surface, so as to facilitate the replacement and maintenance of the rotating filter element 571 and the fixed filter element 581. In this way, the opening and closing of the ball valve and the filter structure can be controlled by the rotation of the rotating main shaft 52 around the ball valve shell 1, and the flow rate of the ball valve and the effect of removing the internal filter element can be controlled by rotating the main shaft 52 forward and reversely.

[0041] The installation sliding seat 51 is slidably connected to the inner surface of the top limiting groove 13, both ends of the filter installation shell 521 are slidably connected to the ball core shell 41, the filter installation shell 521 is slidably connected to the roll-out groove 11, the number of the rotation limiting protrusion 53 and the sliding handle 531 are both two, and the two rotation limiting protrusions 53 and the two sliding handles 531 are symmetrically distributed at both ends of the rotating main shaft 52, the number of the one-way rotating frame 54 and the ratchet rotating disk 55 are both two, and the two one-way rotating frames 54 and the two ratchet rotating disks 55 are symmetrically distributed at both ends of the filter installation shell 521, the number of control ratchets 552 on each ratchet rotating disk 55 is three, and the three control ratchets 552 are distributed in a ring around the ratchet rotating disk 55, the two ends of the ratchet reset spring 551 are respectively fixedly connected to the ratchet rotating disk 55 and the control ratchet 552, the control ratchet 552 is meshed with the ratchet groove 541, the number of the driving gear 56 and the rotating shell 57 are both two, and the two driving gears 56 and the two rotating shells 57 are symmetrically distributed at both ends of the fixed shell 58, both ends of the connecting shaft 542 are rotatably connected to the rotating shell 57, the outer surface of the rotating shell 57 is provided with a gear groove and meshes with the driving gear 56, the top limit groove 13 supports and limits the moving path of the installation sliding seat 51, the installation sliding seat 51 is used to support the rotating main shaft 52, the filter installation shell 521 and the ball core shell 41 form a complete ball core, and can also be rotated from the inside to the outside of the rotation groove 11 for easy replacement and maintenance, the sliding handle 531 can automatically slide on the rotation limiting protrusion 53, but the rotation of the sliding handle 531 will control the rotation of the rotating main shaft 52 through the groove protrusion and the rotation limiting protrusion 53 synchronously, the symmetrically distributed one-way rotating frame 54 and the ratchet rotating disk 55 disperse the force on both sides and cooperate with the weight, and multiple control ratchets 552 increase the restraining force when locking the one-way rotating frame 54, which also has the effect of dispersing the force, and the symmetrical rotating shell 57 is installed with rotatable filter elements at both ends of the fixed shell 58 to increase the effect of multi-layer filtration.

[0042] The sampling mechanism 6 includes a fixed bracket 61, which is fixedly connected to the outer surface of the fluid pipeline 2, a pushing bracket 62 is slidably connected to the inner surface of the fixed bracket 61, a driven moving bracket 621 is fixedly connected to the bottom surface of the pushing bracket 62, a test paper pushing plate 6211 is fixedly connected to the outer surface of the driven moving bracket 621, a trigger rod 622 is fixedly connected to the outer surface of the pushing bracket 62, an adjustable connecting arm 63 is slidably connected to the inner surface of the pushing bracket 62, a sample bracket 65 is fixedly connected to the top surface of the fluid pipeline 2, a sample cylinder 66 is fixedly connected to the top surface of the sample bracket 65, a branch pipeline 661 is fixedly connected to both ends of the sample cylinder 66 on one side of the sample bracket 65, and a bottom surface of the sample cylinder 66 is fixedly connected to the bottom surface of the sample cylinder 66. The opening and closing valve 662 is fixedly connected, and the inner surface of the opening and closing valve 662 is fixedly connected with a normally closed spring 6621, and one end of the normally closed spring 6621 is fixedly connected with a blocking block 6622. The bottom surface of the opening and closing valve 662 is fixedly connected with an output pipe 663, and the top surface of the fluid pipe 2 is fixedly connected with a sample platform 67, and the outer surface of the sample platform 67 is fixedly connected with a test paper storage cabinet 68, and the outer surface of the test paper storage cabinet 68 is fixedly connected with a movable limit rod 681. Through the setting of the sampling mechanism 6, during use, the adjustable connecting arm 63 can be extended and retracted on the pushing frame 62, and can be inserted into the surface of the rotating main shaft 52 after extension. At this time, pushing the sliding handle 531 will drive the adjustable connecting arm 63 and the pushing frame 62 to move in the fixed bracket 6 1 is pushed inward, and drives the trigger rod 622 and the driven moving frame 621 to move toward the sample cylinder 66. Two sample cylinders 66 are installed on the sample support 65, one of which is connected to the fluid pipeline 2 through the branch pipe 661 to divert a part of the filtered fluid, and the other sample cylinder 66 is used to store sample reagents for comparison. The bottom of the sample cylinder 66 is installed with an on-off valve 662, and a blocking block 6622 is installed in the on-off valve 662 to block the fluid inside the on-off valve 662 from flowing out. When the trigger rod 622 and the driven moving frame 621 are close to the sample cylinder 66, the trigger rod 622 will push the blocking block 6622 to make it no longer blocked. At this time, the fluid inside the sample cylinder 66 flows into the sample platform 67 through the output pipe 663. The driven moving frame 621 will drive the test paper push plate 6211 to push into the test paper storage cabinet 68. Litmus papers are stacked in the test paper storage cabinet 68. The test paper push plate 6211 will push the bottom litmus paper into the sample platform 67 to receive the fluid sample in the sample tube 66. At this time, the color change of the litmus paper is observed. The litmus paper under the shunt sample tube 66 indicates the acid-base condition of the current filtered fluid. The litmus paper under the sample tube 66 storing the sample reagent is used to indicate the required acid-base condition. The colors of the two litmus papers are compared to understand whether the current filtered fluid meets the acid-base requirement. When the sliding handle 531 returns, the push frame 62, the driven moving frame 621 and the trigger rod 622 are retracted.The blocking block 6622 closes the opening and closing valve 662 again under the push of the normally closed spring 6621, completing a working cycle.

[0043] There are two push racks 62, and the two push racks 62 are symmetrically distributed with the central axis of the sample holder 65 as the symmetry axis. The adjustable connecting arm 63 is slidably connected to the outer surface of the sliding handle 531. There are two sample tubes 66. The branch pipe 661 penetrates the inner surface of the fluid pipe 2 and is fixedly connected to its inner wall. The trigger rod 622 is slidably connected to one end of the blocking block 6622. The test paper push plate 6211 penetrates the test paper storage cabinet 68 and is slidably connected to its inner surface. The output pipe 663 penetrates to the sample platform 67. The inner surface of the sample tube 66 is controlled by the symmetrical pushing frame 62 on both sides respectively. The adjustable connecting arm 63 can choose whether to be connected to the sliding handle 531 to prevent the rotating route from being blocked when the rotating main shaft 52 drives the sliding handle 531 to rotate. The branch pipe 661 is used to divert the filtered fluid for subsequent testing and comparison. The blocking block 6622 is controlled by the linear movement of the trigger rod 622 to switch the opening and closing valve 662. The output of the litmus paper inside the test paper storage cabinet 68 is controlled by the linear movement of the test paper push plate 6211.

[0044] In this embodiment, Figure 1 As shown, the ball valve housing 1 is used to install the ball core, which is connected to the pipeline required to control on / off and filtering through the fluid pipeline 2 and the connecting flange 3;

[0045] In this embodiment, Figure 2 As shown, when the fluid passing groove 43 is aligned with the pipeline connecting groove 14, the fluid can pass through the fluid pipeline 2, the pipeline connecting groove 14, the fluid passing groove 43 and the filtering mechanism 5 and flow out of the fluid pipeline 2 at the other end;

[0046] In this embodiment, Figure 3 As shown, the symmetrical ball core housing 41 and the filter mechanism 5 form a complete ball core, and the bottom sliding ring 42 is sleeved inside the bottom limiting ring 12 to limit the movement path of the ball core housing 41 and prevent it from falling off from the ball valve housing 1;

[0047] In this embodiment, Figure 4 As shown, the rotating main shaft 52 is connected to the filter installation shell 521 and also drives the filter installation shell 521 to rotate during the rotation process, and the ball core shell 41 installed on both sides also drives the on-off ball core mechanism 4 to rotate to control the fluid on and off;

[0048] In this embodiment, Figure 5As shown, the rotating main shaft 52 rotates and drives the driving gear 56 to rotate, and the driving gear 56 engages with the groove on the outer side of the rotating housing 57, and the rotating housing 57 is installed on the connecting shaft 542. At this time, the rotating housing 57 and the rotating filter element 571 on its surface rotate, but the fixed housing 58 in the filter installation housing 521 does not rotate;

[0049] In this embodiment, Figure 6 As shown, due to the arrangement of the one-way rotating frame 54 and the pawl rotating disk 55, the rotating main shaft 52 can only rotate in one direction. When the rotating main shaft 52 rotates counterclockwise, the control pawl 552 on the pawl rotating disk 55 will be pressed into the groove on the pawl rotating disk 55. When the rotating main shaft 52 rotates clockwise, the control pawl 552 will be reset by the pawl reset spring 551 and bounce out of the groove of the pawl rotating disk 55 and mesh with the ratchet groove 541. At this time, the rotation direction of the control pawl 552 is blocked and cannot rotate. It will be stuck by the ratchet groove 541. At this time, the rotating main shaft 52 cannot rotate inside the one-way rotating frame 54, which is equivalent to the rotating main shaft 52 and the one-way rotating frame 54 being connected as one body.

[0050] In this embodiment, Figure 7 As shown, the filter element is installed in the groove opened on the surface of the rotating housing 57 and the fixed housing 58. When the housing 57 and the fixed housing 58 rotate, the position of the groove also rotates. When the grooves are aligned, the cross-sectional area through which the fluid can pass is the largest. When the grooves are misaligned, a part of the cross-sectional area will be blocked, thereby reducing the cross-sectional area through which the fluid passes.

[0051] In this embodiment, Figure 8 As shown, when the rotating main shaft 52 is stuck by the one-way rotating frame 54, it is equivalent to becoming a whole. When the rotating main shaft 52 is rotated, the one-way rotating frame 54 will be driven to rotate around the rotating main shaft 52, so that it rotates out of the ball core shell 41 and rotates to the outside of the ball valve shell 1 through the rotation groove 11, and rotates the filter installation shell 521, the rotating shell 57 and the fixed shell 58 to the outside of the ball valve shell 1 through the connecting shaft 542 on its surface;

[0052] In this embodiment, Fig. 9 , Fig.10 As shown, two sample cylinders 66 are installed on the sample holder 65, one of which is connected to the fluid pipeline 2 through a branch pipeline 661 to divert a portion of the filtered fluid, and the other sample cylinder 66 is used to store sample reagents for comparison. The bottom of each sample cylinder 66 is equipped with an opening and closing valve 662;

[0053] In this embodiment, Fig.11 As shown, the driven moving frame 621 will drive the test paper push plate 6211 to push into the test paper storage cabinet 68, and litmus papers are stacked in the test paper storage cabinet 68. The test paper push plate 6211 will push the litmus paper at the bottom into the sample platform 67;

[0054] In this embodiment, Fig.12 As shown, pushing the sliding handle 531 will drive the adjustable connecting arm 63 and the pushing frame 62 to move inward on the fixed support 61, and drive the trigger rod 622 and the driven moving frame 621 to move toward the sample tube 66;

[0055] In this embodiment, Fig.13 As shown, when the trigger rod 622 and the driven moving frame 621 approach the sample tube 66 , the trigger rod 622 will push the blocking block 6622 so that it no longer blocks the sample tube. At this time, the fluid inside the sample tube 66 flows into the sample platform 67 through the output pipe 663 .

[0056] A method for using a ball valve with a filtering structure comprises the following steps:

[0057] S1, the ball valve housing 1 is connected to the pipeline required for controlling on-off and filtering through the fluid pipeline 2 and the connecting flange 3, and the fluid flows into the ball valve housing 1 through the fluid pipeline 2 and the pipeline connecting groove 14. If the on-off ball core mechanism 4 is opened at this time, the fluid continues to flow in through the groove 43 and the rotating filter element 571 and the fixed filter element 581 for filtering, and finally flows out from the fluid pipeline 2 at the other end;

[0058] S2. Grip the sliding handles 531 at both ends to drive the rotating main shaft 52 to rotate on the top of the ball valve housing 1 to change the position, thereby driving the complete ball core composed of the ball core housing 41, the filter installation housing 521 and the internal components to rotate inside the ball valve housing 1. When the pipe connection groove 14 is aligned with the fluid passing groove 43, the flow of the fluid is not hindered. After rotating ninety degrees, the pipe connection groove 14 is no longer aligned with the fluid passing groove 43. At this time, the fluid cannot pass through the ball core housing 41 to block the effect. When the ball core housing 41 and the filter installation housing 521 are rotated forty-five degrees, the aligned roll-out groove 11 is used to rotate the filter installation housing 521 out from the inside, and at this time, the pipe connection groove 14 is partially aligned with the fluid passing groove 43. The groove stopper 431 is used to block the gap between the pipe connection groove 14 and the fluid passing groove 43 to prevent the fluid from flowing out when the filter installation housing 521 is rotated out.

[0059] S3, by rotating the sliding handle 531, the rotating main shaft 52 itself is driven to rotate. At this time, the position remains unchanged, and the on-off state of the ball core shell 41 will not be changed. The rotating main shaft 52 can only rotate in one direction in the one-way rotating frame 54 through the ratchet rotating disk 55. When the rotating main shaft 52 rotates counterclockwise, the rotation of the rotating main shaft 52 in the one-way rotating frame 54 is not restricted, and the subsequent driving gear 56 will drive the rotating shell 57 to rotate. The rotating shell 57 is installed on both sides of the fixed shell 58 and the rotating filter element 571 and the fixed filter element 581 are installed in the groove respectively. The position and angle of the fixed shell 58 are fixed. When the rotating shell 57 rotates, the rotating filter element 57 1 and the fixed filter element 581 are offset and blocked from each other, thereby changing the cross-sectional area through which the fluid can pass when passing through the rotating filter element 571 and the fixed filter element 581, and realizing the control of the passing speed of the filtered fluid when the flow rate is constant. When the rotating main shaft 52 rotates clockwise, the rotating main shaft 52 will be stuck by the control pawl 552 and the ratchet groove 541 in the one-way rotating frame 54, which is equivalent to the rotating main shaft 52 and the one-way rotating frame 54 being connected as a whole at this time. Rotating the rotating main shaft 52 will rotate the one-way rotating frame 54, so that it rotates out of the ball core housing 41 and rotates to the outside of the ball valve housing 1 through the rotation groove 11, so as to facilitate the replacement and maintenance of the rotating filter element 571 and the fixed filter element 581;

[0060] S4, the adjustable connecting arm 63 is extended and inserted into the surface of the rotating main shaft 52. At this time, pushing the sliding handle 531 will drive the adjustable connecting arm 63 and the pushing frame 62 to move inward on the fixed bracket 61, and drive the trigger rod 622 and the driven moving frame 621 to move toward the sample tube 66. The trigger rod 622 will push the blocking block 6622 so that it no longer blocks the opening and closing valve 662. At this time, the internal fluid of the sample tube 66 flows into the sample platform 67 through the output pipe 663. The driven moving frame 621 will drive the test paper pushing plate 6211 to push into the test paper storage cabinet 68. Litmus papers are stacked in the test paper storage cabinet 68. The test paper pushing plate 6211 will push the litmus paper at the bottom into the sample platform 67. The blocking block 6622 closes the opening and closing valve 662 again under the pushing action of the normally closed spring 6621, completing a working cycle.

[0061] The above shows and describes the basic principles, main features and advantages of the present invention. Technical personnel in this industry should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A ball valve with a filtering structure, comprising a ball valve housing (1), characterized in that: The outer surface of the ball valve housing (1) is provided with a roll-out groove (11), the bottom surface of the ball valve housing (1) is fixedly connected with a bottom limit ring (12), the top surface of the ball valve housing (1) is provided with a top limit groove (13), the outer surface of the ball valve housing (1) is provided with a pipeline connection groove (14), both ends of the ball valve housing (1) are fixedly connected with fluid pipelines (2), and the fluid pipelines (2) are fixedly connected to the pipeline connection grooves (14), the outer surface of the fluid pipeline (2) is fixedly connected with a connecting flange (3), the inner surface of the ball valve housing (1) is provided with an on-off ball core mechanism (4), the top surface of the ball valve housing (1) is provided with a filtering mechanism (5), and the outer surface of the fluid pipeline (2) is provided with a sampling mechanism (6).

2. A ball valve with a filtering structure according to claim 1, characterized in that: The on-off ball core mechanism (4) comprises a ball core shell (41), the ball core shell (41) is slidably connected to the inner surface of the ball valve shell (1), the bottom surface of the ball core shell (41) is fixedly connected to a bottom sliding ring (42), the outer surface of the ball core shell (41) is provided with a fluid passing groove (43), and the inner surface of the fluid passing groove (43) is fixedly connected to a groove stopper (431).

3. The ball valve with a filtering structure according to claim 2, characterized in that: The number of the core shells (41) is two, the bottom sliding ring (42) is slidably connected to the inner surface of the bottom limiting ring (12), and the groove stopper (431) is slidably connected to the fluid pipeline (2).

4. The ball valve with a filtering structure according to claim 1, characterized in that: The filter mechanism (5) comprises a mounting sliding seat (51), the mounting sliding seat (51) is slidably connected to the top surface of the ball valve housing (1), the inner surface of the mounting sliding seat (51) is rotatably connected to a rotating main shaft (52), the outer surface of the rotating main shaft (52) is rotatably connected to a filter mounting housing (521), both ends of the rotating main shaft (52) are fixedly connected to rotation limiting protrusions (53), the outer surface of the rotation limiting protrusion (53) is slidably connected to a sliding handle (531), the outer surface of the rotating main shaft (52) is rotatably connected to a one-way rotating frame (54), the inner surface of the one-way rotating frame (54) is provided with a ratchet groove (541), and the bottom surface of the one-way rotating frame (54) is rotatably connected to a A connecting shaft (542), the outer surface of the rotating main shaft (52) is fixedly connected to a ratchet rotating disk (55), the outer surface of the ratchet rotating disk (55) is fixedly connected to a ratchet reset spring (551), the outer surface of the ratchet rotating disk (55) is rotatably connected to a control ratchet (552), the outer surface of the rotating main shaft (52) is fixedly connected to a driving gear (56), the outer surface of the connecting shaft (542) is rotatably connected to a rotating housing (57), the inner surface of the rotating housing (57) is fixedly connected to a rotating filter element (571), the inner surface of the filter mounting housing (521) is snap-connected to a fixed housing (58), and the inner surface of the fixed housing (58) is fixedly connected to a fixed filter element (581).

5. The ball valve with a filtering structure according to claim 4, characterized in that: The installation sliding seat (51) is slidably connected to the inner surface of the top limit groove (13), both ends of the filter installation shell (521) are slidably connected to the ball core shell (41), the filter installation shell (521) is slidably connected to the roll-out groove (11), the number of the rotation limiting protrusion (53) and the sliding handle (531) are both two, and the two rotation limiting protrusions (53) and the two sliding handles (531) are symmetrically distributed at both ends of the rotating main shaft (52), the number of the one-way rotating frame (54) and the two ratchet rotating disks (55) are both two, and the two one-way rotating frames (54) and the two ratchet rotating disks (55) are symmetrically distributed at both ends of the filter installation shell (521), and the control ratchet (552) is symmetrically distributed at both ends of the filter installation shell (521). ) are provided on each pawl rotating disk (55) in three numbers, and the three control pawls (552) are distributed in a ring around the pawl rotating disk (55), the two ends of the pawl reset spring (551) are fixedly connected to the pawl rotating disk (55) and the control pawl (552) respectively, the control pawl (552) is meshed with the ratchet groove (541), the number of the driving gear (56) and the rotating shell (57) are two, and the two driving gears (56) and the two rotating shells (57) are symmetrically distributed at the two ends of the fixed shell (58), the two ends of the connecting shaft (542) are rotatably connected to the rotating shell (57), and the outer surface of the rotating shell (57) is provided with a gear groove which meshes with the driving gear (56).

6. The ball valve with a filtering structure according to claim 1, characterized in that: The sampling mechanism (6) comprises a fixed support (61), the fixed support (61) is fixedly connected to the outer surface of the fluid pipeline (2), the inner surface of the fixed support (61) is slidably connected to a push frame (62), the bottom surface of the push frame (62) is fixedly connected to a driven moving frame (621), the outer surface of the driven moving frame (621) is fixedly connected to a test paper push plate (6211), the outer surface of the push frame (62) is fixedly connected to a trigger rod (622), the inner surface of the push frame (62) is slidably connected to an adjustable connecting arm (63), the top surface of the fluid pipeline (2) is fixedly connected to a sample support (65), and the top surface of the sample support (65) is fixedly connected to a sample cylinder (66 ), the two ends of the sample tube (66) on one side of the sample holder (65) are fixedly connected with branch pipes (661), the bottom surface of the sample tube (66) is fixedly connected with an opening and closing valve (662), the inner surface of the opening and closing valve (662) is fixedly connected with a normally closed spring (6621), one end of the normally closed spring (6621) is fixedly connected with a blocking block (6622), the bottom surface of the opening and closing valve (662) is fixedly connected with an output pipe (663), the top surface of the fluid pipe (2) is fixedly connected with a sample platform (67), the outer surface of the sample platform (67) is fixedly connected with a test paper storage cabinet (68), and the outer surface of the test paper storage cabinet (68) is fixedly connected with a movable limit rod (681).

7. The ball valve with a filtering structure according to claim 6, characterized in that: The number of the pushing racks (62) is two, and the two pushing racks (62) are symmetrically distributed with the central axis of the sample holder (65) as the axis of symmetry. The adjustable connecting arm (63) is slidably connected to the outer surface of the sliding handle (531). The number of the sample cylinders (66) is two. The branch pipe (661) passes through the inner surface of the fluid pipe (2) and is fixedly connected to its inner wall. The trigger rod (622) is slidably connected to one end of the blocking block (6622). The test paper push plate (6211) passes through the test paper storage cabinet (68) and is slidably connected to its inner surface. The output pipe (663) passes through the inner surface of the sample platform (67).

8. The method for using a ball valve with a filtering structure according to claim 1 comprises the following steps: S1. The ball valve housing (1) is connected to a pipeline for controlling on / off and filtering through a fluid pipeline (2) and a connecting flange (3). The fluid flows into the ball valve housing (1) through the fluid pipeline (2) and the pipeline connecting groove (14). If the on / off ball core mechanism (4) is opened at this time, the fluid continues to flow in through the groove (43) and the rotating filter element (571) and the fixed filter element (581) for filtering, and finally flows out from the fluid pipeline (2) at the other end. S2. Grip the sliding handles (531) at both ends to drive the rotating main shaft (52) to rotate on the top of the ball valve housing (1) to change the position, thereby driving the complete ball core composed of the ball core housing (41), the filter installation housing (521) and the internal components to rotate inside the ball valve housing (1). When the pipeline connection groove (14) is aligned with the fluid passing groove (43), the flow of the fluid is not hindered. After rotating ninety degrees, the pipeline connection groove (14) is no longer aligned with the fluid passing groove (43). At this time, the fluid cannot pass through the ball core housing (41) and has a blocking effect. When the ball core housing (41) and the filter installation housing (521) are rotated forty-five degrees, the aligned rotation groove (11) is used to rotate the filter installation housing (521) out from the inside, and at this time, the pipeline connection groove (14) is partially aligned with the fluid passing groove (43). The groove stopper (431) is used to block the gap between the pipeline connection groove (14) and the fluid passing groove (43) to prevent the fluid from flowing out when the filter installation housing (521) is rotated out. S3, by rotating the sliding handle (531), the rotating main shaft (52) itself is driven to rotate. At this time, the position remains unchanged, and the on-off state of the ball core shell (41) will not be changed. The rotating main shaft (52) can only rotate in one direction in the one-way rotating frame (54) through the ratchet rotating disk (55). When the rotating main shaft (52) rotates counterclockwise, the rotation of the rotating main shaft (52) in the one-way rotating frame (54) is not restricted, and the subsequent driving gear (56) will drive the rotating shell (57) to rotate. The rotating shell (57) is installed on both sides of the fixed shell (58) and the rotating filter element (571) and the fixed filter element (581) are installed in the groove respectively. The position and angle of the fixed shell (58) are fixed. When the rotating shell (57) rotates, the rotating filter element (57) 1) and the fixed filter element (581) are mutually offset and blocked, thereby changing the cross-sectional area that the fluid can pass through when passing through the rotating filter element (571) and the fixed filter element (581), and realizing the control of the passing speed of the filtered fluid when the flow rate is constant. When the rotating main shaft (52) rotates clockwise, the rotating main shaft (52) is stuck in the one-way rotating frame (54) by the control pawl (552) and the ratchet groove (541), which is equivalent to the rotating main shaft (52) and the one-way rotating frame (54) being connected as a whole at this time. Rotating the rotating main shaft (52) will rotate the one-way rotating frame (54), so that it rotates out of the ball core housing (41) and rotates to the outside of the ball valve housing (1) through the rotation groove (11), so as to facilitate the replacement and maintenance of the rotating filter element (571) and the fixed filter element (581); S4, the adjustable connecting arm (63) is extended and inserted into the surface of the rotating main shaft (52). At this time, pushing the sliding handle (531) will drive the adjustable connecting arm (63) and the pushing frame (62) to move inward on the fixed support (61), and drive the trigger rod (622) and the driven moving frame (621) to move toward the sample tube (66). The trigger rod (622) will push the blocking block (6622) so that it no longer blocks the opening and closing valve (662). At this time, the fluid inside the sample tube (66) The liquid flows into the sample platform (67) through the output pipe (663), and the driven moving frame (621) drives the test paper push plate (6211) to push into the test paper storage cabinet (68). Litmus papers are stacked in the test paper storage cabinet (68), and the test paper push plate (6211) pushes the litmus paper at the bottom into the sample platform (67). The blocking block (6622) closes the opening and closing valve (662) again under the pushing action of the normally closed spring (6621), completing a working cycle.

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