A liquid meter for measuring chemicals

Abstract

The present invention relates to the field of liquid level measurement technology, and in particular to a liquid meter for measuring chemicals; the metering seat comprises a metering seat and an annular groove arranged on the lower surface of the metering seat; the inner wall diameter of the annular groove near the center of the metering seat is not greater than the inner diameter of the mouth of a sub-container tank; the inner wall diameter of the annular groove away from the center of the metering seat is not less than the outer diameter of the mouth of the sub-container tank; the metering seat is provided with a filling hole and an exhaust hole passing through the upper and lower parts near the center; the filling hole and the exhaust hole are located on the inner side of the inner wall of the annular groove; the present invention drives a blocking column to move upward as the liquid level of the chemical product rises through a floating plate, so that the blocking column can block the exhaust hole after the liquid level in the sub-container tank increases to a specified height, thereby stopping the filling of the liquid level in the sub-container tank after the specified volume is injected, so that the liquid level in the sub-container tank is prevented from overflowing the chemical product under measurement, and at the same time, the volume in the sub-container tank is kept consistent after measurement.

Description

Technical Field

[0001] The invention relates to the technical field of liquid level measurement, in particular to a liquid meter used for measuring chemicals. Background Art

[0002] Glycerin, silicone oil, polyvinyl alcohol solution and fluorinated silicic acid are all common chemicals. After production, most chemicals are loaded into a main container tank for storage, while chemicals sold on the market are all smaller sub-container tanks. Sub-container tanks include barrel containers and can containers with openings. Therefore, it is necessary to load the chemicals in the main container tank into the sub-container tank using a hose. Specifically, the end of the hose will be inserted into the interior of the sub-container tank along the opening of the sub-container tank. As the page in the sub-container tank rises to a certain distance from the opening, it is necessary to close the valve at the end of the hose, insert the hose into the next empty sub-container tank, and open the valve at the end of the hose again to carry out the sub-container tank filling. The sub-container tank filled with chemicals can be tightened with a sealing cover.

[0003] Chemical products are different from conventional liquids. If chemicals overflow from the opening of the sub-container tank, it will cause pollution and waste. Therefore, it is necessary to measure the liquid level in the sub-container tank to avoid this situation. In order to make the filling amount of chemicals in each sub-container tank more uniform, it is even more necessary to measure the liquid level of chemicals. The existing liquid level measurement is to set a marking line on the inner wall of the sub-container tank. When the liquid level of the chemical product reaches the scale, the hose valve will be closed, so that the hose stops filling the chemical product. This liquid level measurement method will cause filling delays and errors. The difference is large, and this method is not applicable to some non-transparent sub-container tanks; for some float rods directly inserted into the sub-container tanks to measure the liquid level, the float rod can rise with the rise of the liquid level, and the amount of filled chemicals can be judged by the float rod scale exposed at the opening of the sub-container tank. This method also requires manual judgment, and after reaching the specified liquid level, it is also necessary to manually close the hose valve to stop filling the sub-container tank, which will also cause delays and large errors. Therefore, the measurement of chemical liquid levels in non-transparent sub-container tanks is a problem to be solved at present. Summary of the invention

[0004] In order to make up for the deficiencies of the prior art, the present invention proposes a liquid meter for measuring chemicals. The present invention drives the blocking column to move upward as the liquid level of the chemical product rises through a floating plate, so that the blocking column can block the exhaust hole after the liquid level in the sub-container tank increases to a specified height, and then the liquid level in the sub-container tank stops filling after the specified volume is injected, so that the liquid level in the sub-container tank can avoid overflow of chemicals under measurement, and at the same time, the capacity in the sub-container tank is kept consistent after measurement.

[0005] The technical solution adopted by the present invention to solve its technical problems is as follows: a liquid meter for measuring chemicals according to the present invention comprises a metering seat and an annular groove arranged on the lower surface of the metering seat; the inner wall diameter of the annular groove near the center of the metering seat is not greater than the inner diameter of the mouth of the sub-container tank; the inner wall diameter of the annular groove away from the center of the metering seat is not less than the outer diameter of the mouth of the sub-container tank; the metering seat is provided with a filling hole and an exhaust hole passing through the upper and lower parts near the center; the filling hole and the exhaust hole are located on the inner side of the inner wall of the annular groove; the diameter of the filling hole is adapted to the outer diameter of the filling hose; a triangular bar is movably connected to the upper and lower parts of the exhaust hole; the outer edge of the triangular bar is in contact with the inner wall of the exhaust hole; the upper end of the triangular bar is fixedly connected to a limit block; the lower end of the triangular bar is fixedly connected to a blocking column; the outer diameter of the blocking column is adapted to the inner diameter of the exhaust hole, and a movable contact sealing arrangement is provided; the lower end of the blocking column is connected to a floating plate; the floating plate can drive the blocking column and the triangular bar to move upward under the action of buoyancy.

[0006] Preferably, a threaded hole is provided on the lower surface of the blocking column; a screw rod is connected to the thread in the threaded hole; the screw rod is fixedly connected to the floating plate at the lower end; and the floating plate can change the distance from the blocking column during the twisting process.

[0007] Preferably, one of the edges of the triangular bar is provided with a plurality of slots along the length direction; a groove is provided in the exhaust hole; a block is slidably connected in the groove; the block is connected to the bottom of the groove by a first spring; the groove is adapted to the cross-sectional shape of the slot; the slot can be aligned with the notch of the groove during the movement of the triangular bar; the block can be inserted into the corresponding slot under the action of the first spring; a first guide surface is provided on the end of the block away from the first spring and tilted downward; the upward moving triangular bar can drive the notch of the slot to squeeze the first guide surface; the block overcomes the first spring and retracts into the groove during the pressure on the first guide surface.

[0008] Preferably, a second guide surface is provided at one end of the block away from the first spring in the circumferential direction of the exhaust hole; the rotating triangular bar can drive the slot opening to squeeze the second guide surface; the block overcomes the first spring and retracts into the groove when the second guide surface is compressed.

[0009] Preferably, the other edge of the triangular strip is embedded in the first magnetic strip along the length direction; the inner wall of the exhaust hole is embedded in the second magnetic strip in the axial direction; the second magnetic strip corresponds to and contacts the first magnetic strip; the first magnetic strip and the second magnetic strip attract each other.

[0010] Preferably, an active groove is provided inside the metering seat; the active groove is connected to an active ring in an up and down sliding seal; the upper surface of the active ring is rotatably connected to a screw; the upper end of the screw passes through the metering seat and is threadedly connected to the metering seat; a first annular bag is provided on the inner wall of the annular groove near the center of the metering seat; the inner side of the first annular bag is connected to the lower groove wall of the active groove through a first air hole.

[0011] Preferably, an anti-slip groove is arranged on the inner wall of the annular groove away from the center of the metering seat and at a lower position; the anti-slip groove is slidingly sealed and connected to an anti-slip block; the bottom of the anti-slip groove is connected to the lower groove wall of the active groove through a second air hole.

[0012] Preferably, the anti-slip block is connected to the bottom of the anti-slip groove through a second spring; a plurality of the anti-slip grooves are evenly distributed around the central axis of the metering seat; and the elastic force of the second spring is greater than the elastic force of the first annular bag.

[0013] Preferably, a second annular bag is circumferentially arranged on the inner wall of the injection hole; the interior of the second annular bag is connected with the lower groove wall of the active groove through a third air hole; and the elastic force of the second annular bag is adapted to the elastic force of the first annular bag.

[0014] The beneficial effects of the present invention are as follows:

[0015] 1. The present invention drives the blocking column to move upward as the liquid level of the chemical product rises through the floating plate, so that the blocking column can block the exhaust hole after the liquid level in the sub-container tank increases to a specified height, and then the filling of the sub-container tank is stopped after the liquid level in the sub-container tank is injected into a specified volume, so that the liquid level in the sub-container tank is measured to avoid overflow of the chemical product, and at the same time, the volume in the sub-container tank is kept consistent after measurement.

[0016] 2. In the present invention, when the groove is aligned with the card slot, the first spring drives the card block to be inserted into the groove, thereby locking the triangular bar in the exhaust hole. This prevents the floating plate from shaking due to the fluctuation of the liquid level of the chemical product in the sub-container tank and driving the triangular bar to move, thereby improving the sealing stability of the exhaust hole by the blocking column, and preventing the blocking block from moving out again after blocking the exhaust hole, thereby enabling the liquid level in the sub-container tank to be accurately measured, and preventing the liquid level from being too high or too low.

[0017] 3. The present invention drives the active ring to squeeze the medium in the active groove by twisting the screw, so that the metering seat is locked and sealed at the mouth of the sub-container tank, and the gap between the hose and the injection hole is also blocked. Therefore, when the sealing column blocks the exhaust hole, the gas in the sub-container tank cannot be discharged, and the liquid level in the sub-container tank cannot increase, which further reduces the liquid level error and realizes the accurate measurement of the amount of chemicals in the sub-container tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described below in conjunction with the accompanying drawings and implementation modes.

[0019] Figure 1 It is a three-dimensional diagram at one angle of the present invention;

[0020] Figure 2 yes Figure 1 The enlarged view of point A in the middle;

[0021] Figure 3 It is a three-dimensional diagram of the present invention at another angle;

[0022] Figure 4 is an axial cross-sectional view of the present invention;

[0023] Figure 5 yes Figure 4 The enlarged view of point B in the middle;

[0024] Figure 6 is a radial cross-sectional view of the present invention;

[0025] Figure 7 yes Figure 6 Enlarged view of point C in the middle;

[0026] Figure 8 It is a three-dimensional diagram of the triangular bar and the floating plate in the present invention;

[0027] Fig. 9 yes Figure 8 The enlarged view of point D in the middle;

[0028] Fig.10 It is a three-dimensional diagram of the card block in the present invention;

[0029] Fig.11 It is a three-dimensional diagram of the triangular strip in the present invention.

[0030] In the figure: metering seat 1, annular groove 11, injection hole 12, exhaust hole 13, groove 14, second magnetic strip 15, active groove 16, anti-slip groove 17, triangular strip 2, limit block 21, slot 22, first magnetic strip 23, blocking column 3, floating plate 31, threaded hole 32, screw rod 33, block 4, first spring 41, first guide surface 42, second guide surface 43, active ring 5, screw rod 51, first annular capsule 6, first air hole 61, anti-slip block 7, second air hole 71, second spring 72, second annular capsule 8, third air hole 81. DETAILED DESCRIPTION

[0031] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0032] like Figures 1 to 11 As shown, the present invention includes the following embodiments: Embodiment 1:

[0033] A liquid meter for measuring chemical products, comprising a metering seat 1 and an annular groove 11 arranged on the lower surface of the metering seat 1; the inner wall diameter of the annular groove 11 near the center of the metering seat 1 is not greater than the inner diameter of the mouth of the sub-container tank; the inner wall diameter of the annular groove 11 away from the center of the metering seat 1 is not less than the outer diameter of the mouth of the sub-container tank; the metering seat 1 is provided with a material injection hole 12 and a vent hole 13 passing through the upper and lower parts near the center; the material injection hole 12 and the vent hole 13 are located on the inner side of the inner wall of the annular groove 11; the material injection hole 1 2 aperture is adapted to the outer diameter of the injection hose; the exhaust hole 13 is movably connected with a triangular bar 2 in the upper and lower parts; the outer edge of the triangular bar 2 is in contact with the inner wall of the exhaust hole 13; the upper end of the triangular bar 2 is fixedly connected to a limit block 21; the lower end of the triangular bar 2 is fixedly connected to a blocking column 3; the outer diameter of the blocking column 3 is adapted to the inner diameter of the exhaust hole 13, and a movable contact sealing arrangement is provided; the lower end of the blocking column 3 is connected to a floating plate 31; the floating plate 31 can drive the blocking column 3 and the triangular bar 2 to move upward under the action of buoyancy.

[0034] During operation, the staff will clean the inside of the annular groove 11 before use, and check the meter and put it into use if there is no fault. Then the staff will hold the meter close to the tank mouth of the air separation container tank, and first insert the floating plate 31 into the tank mouth. The tank mouth of the air separation container tank is generally in the shape of an externally threaded ring. After the floating plate 31 enters the tank mouth, the meter is held and moved down. After the annular groove 11 on the lower surface of the metering seat 1 is roughly aligned with the upper end of the tank mouth, the metering seat 1 is held and moved down. The annular groove 11 on the lower surface of the metering seat 1 is sleeved on the tank mouth to achieve a preliminary seal between the annular groove 11 and the tank mouth. Then the staff loosens the triangular strip 2. The triangular strip 2 will move down under the action of the gravity of the blocking column 3 and the floating plate 31, and the outer edge of the triangular strip 2 will be close to the inner wall of the exhaust hole 13. When the three-sided strip 2 moves downward, the limit block 21 moves downward. The limit block 21 is larger than the exhaust hole 13. After the three-sided strip 2 moves downward, the limit block 21 contacts the upper surface of the metering seat 1 to limit the downward movement of the three-sided strip 2. After the limit block 21 contacts the upper surface of the metering seat 1, the upper end of the exhaust hole 13 can also be blocked. Then the staff will insert the hose connected to the main container tank and with a valve along the injection hole 12. The aperture of the injection hole 12 is adapted to the outer wall of the hose. Then, when the valve on the hose is opened, the chemicals will enter the sub-container tank from the main container tank along the hose. The pressure of the gas in the sub-container tank increases after the chemicals enter. The annular groove 11 is temporarily sealed with the tank mouth, and the injection hole 12 is also temporarily sealed with the outer wall of the hose. Therefore, the gas in the sub-container tank can only The gas in the exhaust hole 13 will flow from bottom to top along the gap between the triangular strip 2 and the wall of the exhaust hole 13, and finally push the limit block 21 open. The limit block 21 is separated from the metering seat 1 under the action of the airflow to form a gap, so that the gas in the sub-container tank can be discharged smoothly, so that the chemicals in the hose can enter the sub-container tank smoothly. As the liquid level in the sub-container tank rises, the gap between the liquid level and the floating plate 31 becomes shorter and shorter, until the chemical product contacts the floating plate 31, and the floating plate 31 is moved upward by the buoyancy. During the upward movement of the floating plate 31, the blocking column 3 and the triangular strip 2 will be driven upward. During the upward movement of the triangular strip 2, it will move upward along the wall of the exhaust hole 13, and the blocking column 3 will enter the exhaust hole from bottom to top during the upward movement. The lower opening of the hole 13 is closed until the blocking block enters the inner side of the exhaust hole 13, and the sealing work of the sub-container tank mouth is completed, so that the gas in the sub-container tank cannot be discharged. In this way, under the action of the air pressure in the sub-container tank, the chemicals in the hose cannot enter the inside of the sub-container tank. It should be noted that the liquid pressure in the hose is relatively small. After the chemicals in the hose stop entering, the filling of the chemicals is completed to avoid the situation where the chemicals are continuously filled and overflow from the tank mouth. During the process of injecting chemicals into the hose, the staff does not need to supervise and return to the position of the sub-container tank after a period of time to manually detect whether there is gas discharged from the exhaust hole 13. If not, it means that the chemicals in the sub-container tank are filled to the specified capacity, and then the valve on the hose is closed.The meter and the hose are put into the mouth of the next air separation tank to fill the new tank, and the mouth of the tank that has completed the chemical filling is tightened and sealed by the end cover, and this process is repeated;

[0035] The present invention drives the blocking column 3 to move upward as the liquid level of the chemical product rises by means of the floating plate 31, so that the blocking column 3 can block the exhaust hole 13 after the liquid level in the sub-container tank increases to a specified height, thereby stopping the filling of the liquid level in the sub-container tank after the specified volume is injected, so that the liquid level in the sub-container tank is prevented from overflowing the chemical product under measurement, and at the same time, the volume in the sub-container tank is kept consistent through measurement. Embodiment 2:

[0036] A threaded hole 32 is provided on the lower surface of the blocking column 3; a screw rod 33 is connected to the inner thread of the threaded hole 32; the screw rod 33 is fixedly connected to the floating plate 31 at the lower end; the floating plate 31 can change the distance between it and the blocking column 3 during the twisting process.

[0037] During operation, before the floating plate 31 in the meter is inserted into the inner side of the tank mouth in the sub-container tank, the staff will twist the floating plate 31 according to the container addition amount in the sub-container tank, and the screw rod 33 will be driven to rotate forward in the threaded hole 32 during the forward rotation of the floating plate 31, and the forward rotating floating plate 31 will be away from the blocking column 3, so that the injection of chemicals can be stopped when the liquid level in the sub-container tank is low, and the screw rod 33 will be driven to reverse in the threaded hole 32 during the reverse rotation of the floating plate 31, and the reversed floating plate 31 will be close to the blocking column 3, so that the injection of chemicals can be stopped when the liquid level in the container tank is high. In this way, by adjusting the floating plate 31, the liquid levels at different heights in the sub-container tank can be measured, the liquid level measurement range in the sub-container tank is increased, and the demand for filling chemicals of different capacities in the sub-container tank is met. Embodiment 3:

[0038] One of the edges of the triangular bar 2 is provided with a plurality of slots 22 along the length direction; a groove 14 is provided in the exhaust hole 13; a block 4 is slidably connected in the groove 14; the block 4 is connected to the bottom of the groove 14 by a first spring 41; the groove 14 is adapted to the cross-sectional shape of the slot 22; the slot 22 can be aligned with the notch of the groove 14 during the movement of the triangular bar 2; the block 4 can be inserted into the corresponding slot 22 under the action of the first spring 41; a first guide surface 42 is provided at one end of the block 4 away from the first spring 41 and tilted downward; the upwardly moving triangular bar 2 can drive the notch of the slot 22 to squeeze the first guide surface 42; the block 4 overcomes the first spring 41 and retracts into the groove 14 during the pressure of the first guide surface 42.

[0039] In this embodiment, a second guide surface 43 is provided on the circumference of the exhaust hole 13 at one end of the block 4 away from the first spring 41; the rotating triangular bar 2 can drive the slot 22 to squeeze the second guide surface 43; the block 4 overcomes the first spring 41 and retracts into the groove 14 when the second guide surface 43 is compressed.

[0040] In this embodiment, the other edge of the triangular strip 2 is embedded in the first magnetic strip 23 along the length direction; the inner wall of the exhaust hole 13 is embedded in the second magnetic strip 15 in the axial direction; the second magnetic strip 15 corresponds to and contacts the first magnetic strip 23; the first magnetic strip 23 and the second magnetic strip 15 attract each other.

[0041] During operation, as the chemical product flows into the sub-container tank along the hose, the liquid level in the sub-container tank will rise, and the contact between the liquid level and the float plate 31 will drive the float plate 31 to move upward. The float plate 31 drives the blocking column 3 and the triangular bar 2 to move upward under the action of buoyancy. Since the first magnetic strip 23 on the other side of the triangular bar 2 and the second magnetic strip 15 embedded on the inner wall of the exhaust hole 13 attract each other, the triangular bar 2 will not rotate by itself in the exhaust hole 13. In this way, the triangular bar 2 will be driven to move axially in the exhaust hole 13 under the action of the buoyancy of the float plate 31. During the upward movement of the triangular bar 2, multiple slots 22 will be driven to pass through the groove 14 in sequence. After one of the slots 22 is aligned with the groove 14, the first spring 41 in the groove 14 will push the block 4 to be inserted into the slot 22 However, since the triangular bar 2 is still moving upward, the triangular bar 2 will squeeze the first guide surface 42 through the card slot 22, so that the card block 4 overcomes the first spring 41 and retracts into the groove 14 under the guidance and squeezing of the first guide surface 42, until the next groove 14 is aligned with the card slot 22, and the first spring 41 drives the card block 4 to be clamped into the groove 14 again, so as to lock the triangular bar 2 in the exhaust hole 13, thereby preventing the floating plate 31 from shaking under the fluctuation of the liquid level of the chemical product in the sub-container tank and driving the triangular bar 2 to move, so that the blocking stability of the blocking column 3 on the exhaust hole 13 is improved, and the blocking block is prevented from moving out again after blocking the exhaust hole 13, so that the liquid level in the sub-container tank can be accurately measured to avoid the situation where the liquid level is too high or too low;

[0042] Before the staff rushes back to the site and replaces the new sub-container tank, they will rotate the triangular bar 2. During the rotation, the triangular bar 2 drives the card slot 22 to squeeze the second guide surface 43, so that the card block 4 is under pressure to overcome the first spring 41 and retract into the groove 14. The card slot 22 is also staggered with the groove 14 in the circumferential direction, and the first magnetic strip 23 and the second magnetic strip 15 are also staggered. Finally, the floating plate 31 is pulled away from the metering seat 1 and then turned back to the triangular bar 2, so that the first magnetic strip 23 and the second magnetic strip 15 are in contact again, and the card slot 22 returns to the same circumferential position as the groove 14 again, so that in the subsequent upward movement of the triangular bar 2, it can play a unilateral upward movement and be locked. Embodiment 4:

[0043] An active groove 16 is provided inside the metering seat 1; the active groove 16 is connected to the active ring 5 in an up and down sliding seal; the upper surface of the active ring 5 is rotatably connected to the screw 51; the upper end of the screw 51 passes through the metering seat 1 and is threadedly connected to the metering seat 1; the inner wall of the annular groove 11 near the center of the metering seat 1 is provided with a first annular capsule 6; the inner side of the first annular capsule 6 is connected to the lower groove wall of the active groove 16 through a first air hole 61.

[0044] In this embodiment, an anti-slip groove 17 is provided at the lower position of the inner wall of the annular groove 11 away from the center of the metering seat 1; the anti-slip groove 17 is slidingly sealed and connected to the anti-slip block 7; the bottom of the anti-slip groove 17 is connected to the lower groove wall of the active groove 16 through the second air hole 71.

[0045] In this embodiment, the anti-slip block 7 is connected to the bottom of the anti-slip groove 17 through a second spring 72; a plurality of the anti-slip grooves 17 are evenly distributed around the central axis of the metering seat 1; and the elastic force of the second spring 72 is greater than the elastic force of the first annular bag 6.

[0046] In this embodiment, a second annular bag 8 is circumferentially arranged on the inner wall of the injection hole 12; the interior of the second annular bag 8 is connected to the lower groove wall of the active groove 16 through the third air hole 81; the elastic force of the second annular bag 8 is adapted to the elastic force of the first annular bag 6.

[0047] During operation, after the staff holds the annular groove 11 on the lower surface of the metering seat 1 and aligns it with the mouth of the sub-container tank, the annular groove 11 is put on the mouth of the sub-container tank, which can also be understood as the mouth of the sub-container tank relatively entering the annular groove 11, and then the hose is inserted into the injection hole 12, and then the screw 51 is turned, the active groove 16 space above the active ring 5 is connected with the outside, so it will not affect the downward movement of the active ring 5. When the screw 51 is turned in the forward direction, it will drive the active ring 5 to move downward to squeeze the medium in the lower part of the active groove 16, so that the medium in the active groove 16 is pressurized and flows out along the first air hole 61, the second air hole 71 and the third air hole 81, and the gas in the second air hole 71 will enter the anti-slip groove 17, and the second spring 72 is arranged in the anti-slip groove 17, and the elastic force of the second spring 72 is greater than the elastic force of the first annular bag 6 and the second annular bag 8, so the anti-slip groove 17 is provided with a second spring 72. The stripping block 7 will extend out of the corresponding anti-stripping groove 17 under the second spring 72 and the medium pressure, and the anti-stripping block 7 will contact the external thread on the outer wall of the tank mouth, so as to clamp the metering seat 1 and achieve the purpose of anti-stripping; as the active ring 5 continues to move downward, the active groove 16 space below the active ring 5 can be filled with liquid medium or gas medium. For the convenience of description, taking the gas medium as an example, the gas in the first air hole 61 will enter the first annular bag 6, so that the first annular bag 6 bulges, and the bulging first annular bag 6 will fill the gap between the inner wall of the tank mouth and the groove wall of the annular groove 11, so as to further seal the annular groove 11 and the tank mouth; the gas in the third air hole 81 will enter the second annular bag 8, so that the second annular bag 8 expands, so that the gap between the outer wall of the hose and the hole wall of the injection hole 12 is filled, and the hose is clamped and sealed;

[0048] During the process of injecting chemicals into the sub-container tank, since the annular groove 11 is sealed with the tank mouth and the hose is sealed with the injection hole 12, the gas can only be discharged along the exhaust hole 13. After the exhaust hole 13 is blocked by the blocking column 3 during the subsequent measurement process of the floating plate 31, the gas in the sub-container tank cannot be discharged, so that the liquid level in the sub-container tank cannot be increased, thereby achieving accurate measurement of the amount of chemicals in the sub-container tank.

[0049] After the chemical product in the sub-container tank is injected, the valve on the hose is closed, and the screw 51 is turned in the opposite direction to drive the active ring 5 to move upward, so that the second annular bag 8 and the first annular bag 6 are deflated, and then the anti-slip block 7 retracts into the anti-slip groove 17 under the action of negative pressure, releasing the locking between the metering seat 1 and the tank mouth, so that the metering seat 1 is easy to remove;

[0050] In this embodiment, the active ring 5 is driven to squeeze the medium in the active groove 16 by twisting the screw 51, so that the metering seat 1 is locked and sealed on the mouth of the sub-container tank, and the gap between the hose and the injection hole 12 is also blocked. Therefore, when the sealing column 3 blocks the exhaust hole 13, the gas in the sub-container tank cannot be discharged, and the liquid level in the sub-container tank cannot be increased, so that the liquid level error is further reduced, and the accurate measurement of the amount of chemicals in the sub-container tank is achieved.

[0051] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as limiting the scope of protection of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0052] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of 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. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A liquid meter for measuring chemicals, characterized in that: The invention comprises a metering seat (1) and an annular groove (11) arranged on the lower surface of the metering seat (1); the inner wall diameter of the annular groove (11) near the center of the metering seat (1) is not greater than the inner diameter of the mouth of the sub-container tank; the inner wall diameter of the annular groove (11) away from the center of the metering seat (1) is not less than the outer diameter of the mouth of the sub-container tank; the metering seat (1) is provided with an injection hole (12) and an exhaust hole (13) passing through the metering seat (1) near the center; the injection hole (12) and the exhaust hole (13) are located on the inner side of the inner wall of the annular groove (11); the diameter of the injection hole (12) is equal to the outer diameter of the injection hose. The exhaust hole (13) is adapted to the inner diameter of the exhaust hole (13); the triangular bar (2) is movably connected to the exhaust hole (13) up and down; the outer edge of the triangular bar (2) is in contact with the inner wall of the exhaust hole (13); the upper end of the triangular bar (2) is fixedly connected to the limit block (21); the lower end of the triangular bar (2) is fixedly connected to the blocking column (3); the outer diameter of the blocking column (3) is adapted to the inner diameter of the exhaust hole (13), and a movably contacting and sealing arrangement is provided; the lower end of the blocking column (3) is connected to the floating plate (31); the floating plate (31) can drive the blocking column (3) and the triangular bar (2) to move upward under the action of buoyancy; The lower surface of the blocking column (3) is provided with a threaded hole (32); the threaded hole (32) is internally threadedly connected to a screw rod (33); the screw rod (33) is fixedly connected to a floating plate (31) at its lower end; and the floating plate (31) can change its distance from the blocking column (3) during the screwing process.

2. A liquid meter for measuring chemicals according to claim 1, characterized in that: One of the edges of the triangular bar (2) is provided with a plurality of slots (22) along the length direction; a groove (14) is provided in the exhaust hole (13); a block (4) is slidably connected in the groove (14); the block (4) is connected to the bottom of the groove (14) via a first spring (41); the groove (14) is adapted to the cross-sectional shape of the slot (22); the slot (22) can be aligned with the notch of the groove (14) during the movement of the triangular bar (2); The clamping block (4) can be clamped into the corresponding clamping slot (22) under the action of the first spring (41); the clamping block (4) is provided with a first guide surface (42) at one end away from the first spring (41) and tilted downward; the upwardly moving triangular prism (2) can drive the notch of the clamping slot (22) to squeeze the first guide surface (42); the clamping block (4) overcomes the first spring (41) and retracts into the groove (14) during the process of the first guide surface (42) being pressed.

3. A liquid meter for measuring chemicals according to claim 2, characterized in that: A second guide surface (43) is provided at one end of the clamping block (4) away from the first spring (41) in the circumferential direction of the exhaust hole (13); the rotating triangular prism (2) can drive the notch of the clamping slot (22) to squeeze the second guide surface (43); and the clamping block (4) overcomes the first spring (41) and retracts into the groove (14) during the process of the second guide surface (43) being pressed.

4. A liquid meter for measuring chemicals according to claim 3, characterized in that: The other edge of the triangular strip (2) is embedded in the first magnetic strip (23) along the length direction; the inner wall of the exhaust hole (13) is embedded in the second magnetic strip (15) in the axial direction; the second magnetic strip (15) and the first magnetic strip (23) are in corresponding positions and in contact; the first magnetic strip (23) and the second magnetic strip (15) attract each other.

5. The liquid meter for measuring chemicals according to claim 1, characterized in that: An active groove (16) is provided inside the metering seat (1); the active groove (16) is connected to an active ring (5) in an upward and downward sliding sealing manner; the upper surface of the active ring (5) is rotatably connected to a screw rod (51); the upper end of the screw rod (51) passes through the metering seat (1) and is threadedly connected to the metering seat (1); a first annular capsule (6) is provided on the inner wall of the annular groove (11) near the center of the metering seat (1); the inner side of the first annular capsule (6) is connected to the lower groove wall of the active groove (16) through a first air hole (61).

6. A liquid meter for measuring chemicals according to claim 5, characterized in that: An anti-slip groove (17) is provided on the inner wall of the annular groove (11) away from the center of the metering seat (1) and at a lower position; the anti-slip groove (17) is slidably sealed and connected to the anti-slip block (7); the bottom of the anti-slip groove (17) is connected to the lower groove wall of the active groove (16) through a second air hole (71).

7. A liquid meter for measuring chemicals according to claim 6, characterized in that: The anti-slip block (7) is connected to the bottom of the anti-slip groove (17) via a second spring (72); a plurality of the anti-slip grooves (17) are evenly distributed around the central axis of the metering seat (1); and the elastic force of the second spring (72) is greater than the elastic force of the first annular bag (6).

8. The liquid meter for measuring chemicals according to claim 5, characterized in that: A second annular bag (8) is circumferentially arranged on the inner wall of the injection hole (12); the interior of the second annular bag (8) is connected to the lower groove wall of the active groove (16) through a third air hole (81); and the elastic force of the second annular bag (8) is adapted to the elastic force of the first annular bag (6).

Images