Liquid measurement device

Abstract

The invention provides liquid measuring equipment. The liquid measuring equipment comprises a first supporting device, a weighing device, a liquid collecting container and a clamping device, the first supporting device is arranged in the horizontal direction. The weighing device is connected to the first supporting device and provided with a cantilever support, and a first hanging part is arranged at the end of the cantilever support. The liquid collecting container is hung on the first hanging part, so that the weighing device can calculate the weight of the liquid collecting container by measuring the load transmitted by the first hanging part. The clamping device comprises at least one clamp which can move between a clamping position and a releasing position, when the at least one clamp is located at the clamping position, the at least one clamp can be tightly attached to the liquid collecting container so as to clamp the liquid collecting container, and when the at least one clamp is located at the releasing position, the at least one clamp can release the liquid collecting container. When the at least one clamping jaw is in the release position, the clamping jaw can be far away from the liquid collecting container. According to the scheme, the liquid measuring equipment can meet two requirements of transportation protection and measurement precision at the same time.

Description

Technical Field

[0001] This invention relates to the field of agricultural irrigation technology. More specifically, this invention relates to a liquid measuring device. Background Technology

[0002] Modern agriculture has evolved from relying on natural conditions and experience-based planting to precision agriculture based on plant growth models. These models require precise on-site data to optimize water and fertilizer supply, thereby increasing yields and reducing costs. The weight of the irrigated solution delivered to the plants and the weight of the remaining return solution after absorption are also indicators that need to be measured. However, existing measuring devices are complex in structure, expensive to manufacture, and often suffer from low measurement accuracy.

[0003] Therefore, there is a need to provide a liquid measuring device to at least partially solve the above problems. Summary of the Invention

[0004] This invention provides a liquid measuring device, comprising: A first support device is provided, wherein the first support device is arranged horizontally; A weighing device, the weighing device being connected to the first support device, the weighing device having a cantilever bracket, and a first suspension part being provided at the end of the cantilever bracket; A liquid collection container, suspended from the first suspension unit, such that the weighing device can calculate the weight of the liquid collection container by measuring the load transmitted by the first suspension unit; and A clamping device comprising at least one clamping clamp movable between a clamping position and a release position, wherein the at least one clamping clamp is configured to fit tightly against the liquid collection container to clamp the liquid collection container when in the clamping position, and to be able to move away from the liquid collection container when in the release position.

[0005] Preferably, the liquid measuring device further includes a second suspension part and a connecting arm connected to the second suspension part, the connecting arm being connected to the first support device, and the second suspension part and the first suspension part jointly suspending the liquid collection container.

[0006] Preferably, the first suspension part and the second suspension part are suspended on opposite sides of the upper port edge of the liquid collection container.

[0007] Preferably, the at least one set of clamping clamps includes a first clamping clamp and a second clamping clamp, the first clamping clamp and the second clamping clamp are respectively disposed on opposite sides of the liquid collection container, and the first clamping clamp and the second clamping clamp each have a clamping surface adapted to the outer wall contour of the liquid collection container.

[0008] Preferably, the clamping device further includes an actuation device configured to simultaneously drive the movement of the first clamping jaws and the second clamping jaws.

[0009] Preferably, the clamping device further includes a transmission device connected to the actuation device, the transmission device being connected to the first clamping jaws and the second clamping jaws, wherein the actuation device is configured to drive the movement of the first clamping jaws and the second clamping jaws via the transmission device.

[0010] Preferably, the transmission device includes a bidirectional lead screw, which comprises a left-handed screw section, a right-handed screw section, and a coupling connecting the left-handed screw section and the right-handed screw section together. A left-handed nut that mates with the left-handed screw section is fixedly disposed on the first clamping clamp, and a right-handed nut that mates with the right-handed screw section is fixedly disposed on the second clamping clamp. The left-hand screw section and the right-hand screw section are respectively threaded to the left-hand nut and the right-hand nut, so that when the bidirectional screw rotates around its axis, the first clamping clamp and the second clamping clamp can move synchronously towards or away from each other.

[0011] Preferably, the actuation device includes an operating lever disposed at one end of the bidirectional lead screw for applying rotational force.

[0012] Preferably, the clamping device further includes: A second support device is provided, which is arranged in a vertical direction; A crossbeam, which is mounted on the second support device and configured to slide up and down along the second support device; Guide post, the guide post being fixedly connected to the crossbeam. The first clamp and the second clamp are both connected to the guide post and arranged perpendicular to the guide post, and the first clamp and the second clamp are slidably mounted on the guide post.

[0013] Preferably, the liquid collection container includes a raw liquid container and a return liquid container, which are arranged side by side, and the liquid measuring device includes two weighing devices for weighing the raw liquid container and the return liquid container respectively.

[0014] Preferably, the bidirectional lead screw is disposed between the raw liquid container and the return liquid container, and the clamping device includes two guide posts, which are respectively disposed outside the raw liquid container and outside the return liquid container. The two guide posts are fixed to the crossbeam parallel to each other, and the bidirectional lead screw is parallel to the two guide posts.

[0015] Preferably, the liquid measuring device further includes a measuring container and a parameter measuring device. The measuring container is provided with a first inlet and a second inlet communicating with its internal space. The original liquid container is connected to the first inlet through a first pipeline, and the return liquid container is connected to the second inlet through a second pipeline. The liquid measuring device further includes a first pumping device and a second pumping device. The first pumping device is configured to pump the liquid in the original liquid container to the measuring container through the first pipeline, and the second pumping device is configured to pump the liquid in the return liquid container to the measuring container through the second pipeline. The parameter measuring device is disposed in the measuring container and configured to measure the parameters of the liquid in the measuring container.

[0016] Preferably, the liquid measuring device further includes two one-way isolation devices, which are connected to the measuring container at the first inlet and the second inlet, respectively, and are connected to the ends of the first pipeline and the second pipeline, respectively.

[0017] Preferably, the unidirectional isolation device is detachably connected to the measuring container.

[0018] Preferably, the one-way isolation device includes: an isolation plug, a valve body, and an actuator disposed in the valve body, the actuator being connected to the isolation plug, a flow channel being formed inside the valve body, the flow channel having an inlet disposed at one end of the valve body and an outlet disposed at the other end of the valve body, the valve body being connected to the first pipeline or the second pipeline at the inlet, the valve body being connected to the measuring container at the outlet, and the isolation plug being able to seal the outlet under the action of the actuator.

[0019] Preferably, the actuator is disposed upstream of the outlet along the flow direction of the fluid in the flow channel, and the isolation plug is disposed downstream of the outlet along the flow direction.

[0020] Preferably, the actuator includes an elastic element and a guide post, one end of the guide post being connected to the isolation plug, and the elastic element being able to act on the guide post to provide a preload force that tends to close the outlet of the isolation plug.

[0021] Preferably, the valve body is provided with a spring seat, and the end of the guide post near the inlet is provided with a limiting part that protrudes outward in the radial direction relative to the guide post, and the elastic element is disposed between the spring seat and the limiting part.

[0022] Preferably, the isolation plug has a protruding structure extending toward the outlet, and when the isolation plug is in a sealed state sealing the outlet, a portion of the protruding structure extends into the valve body, wherein the protruding structure has an inclined first guide surface, and the valve body has an inclined second guide surface that mates with the first guide surface.

[0023] Preferably, the unidirectional isolation device further includes a first sealing element, which is disposed on the first guide surface or the second guide surface.

[0024] Preferably, the outer wall of the valve body is provided with an external thread, and the inner walls of the measuring container forming the first inlet and the second inlet are respectively provided with internal threads that mate with the external thread.

[0025] Preferably, the one-way isolation device further includes a second seal, which is disposed on the upstream side of the valve body relative to the external thread along the flow direction. When the one-way isolation device is installed to the measuring container, the second seal seals against the inner wall of the measuring container forming the first inlet or the second inlet.

[0026] The liquid measuring device according to the present invention has the following beneficial effects: (1) The clamping device provided by the present invention can move between the clamping position and the release position. During the handling, moving or transport of liquid measuring equipment, the clamping device can be adjusted to the clamping position to firmly clamp the liquid collection container, avoiding the impact force generated by shaking from being transmitted to the high-precision weighing device (such as electronic scale sensor), effectively preventing sensor damage, greatly extending the service life of the equipment, and improving reliability and durability.

[0027] (2) When it is necessary to weigh the liquid collection container, the clamping device can be switched to the release position to restore the liquid collection container to a free suspension state, so that the weighing device can perform high-precision measurement on it, and the liquid measuring device can simultaneously meet the two major requirements of transportation protection and measurement accuracy.

[0028] (3) The clamping device provided by the present invention can simultaneously control the clamping and release of multiple containers (such as raw liquid containers and return liquid containers) arranged side by side through a drive and support frame consisting of a two-way screw, guide column and crossbeam, which simplifies the structure of multi-container measuring equipment and makes the operation more synchronous and unified.

[0029] (4) The liquid measuring device provided by the present invention uses only one set of measuring container and parameter measuring device to alternately measure the original liquid and return liquid, thereby eliminating the need for additional measuring instruments, greatly reducing the cost of the equipment and simplifying the overall structure.

[0030] (5) In the one-way isolation device, the valve body is connected to the measuring container at the outlet. The isolation plug can immediately close the outlet after the corresponding pumping device is shut down, thereby immediately isolating the liquid in the measuring container from the liquid in the upstream pipeline, thus preventing the liquid remaining in the upstream pipeline from contacting and mixing with the other liquid to be measured in the measuring container.

[0031] (6) The one-way isolation device adopts a detachable design, which is convenient for users to disassemble, clean or replace, and solves the problem that fertilizer crystallization may block the valve port. Attached Figure Description

[0032] To better understand the above and other objects, features, advantages, and functions of the present invention, reference can be made to the preferred embodiments shown in the accompanying drawings. The same or similar reference numerals in the drawings refer to the same or similar parts. Those skilled in the art should understand that the drawings are intended to schematically illustrate preferred embodiments of the invention and do not limit the scope of the invention in any way; the parts in the drawings are not drawn to scale.

[0033] Figure 1 This is a schematic block diagram of a liquid measuring device according to a preferred embodiment of the present invention.

[0034] Figure 2 This is a schematic diagram of a measuring container and a parameter measuring device disposed in the measuring container according to a preferred embodiment of the present invention.

[0035] Figure 3 for Figure 1 The diagram shows a one-way isolation device of a liquid measuring device, with a portion of the one-way isolation device cut open to clearly show its internal structure.

[0036] Figure 4 This is a partial schematic diagram of a liquid measuring device according to a preferred embodiment of the present invention.

[0037] Figure 5 for Figure 4 A schematic diagram of the clamping device of the liquid measuring equipment shown. Detailed Implementation

[0038] The preferred embodiment of the liquid measuring device according to the present invention will now be described in detail with reference to the accompanying drawings. The embodiments given below are merely preferred embodiments of the present invention; those skilled in the art can conceive of other ways to implement the invention based on the preferred embodiments, and such other ways also fall within the scope of the present invention.

[0039] First, it should be noted that the directional and positional terms mentioned in this invention should be understood as relative directions and relative positions. The directional and positional terms mentioned in this invention can be understood with reference to the accompanying drawings.

[0040] The liquid measuring device disclosed in this invention is mainly used for the precise measurement of raw nutrient solution and return solution in agricultural irrigation. Raw nutrient solution generally refers to the unused nutrient solution to be measured from the irrigation source, while return solution generally refers to the residual liquid flowing back from the planting area (such as a cultivation trough) after being absorbed by the crop or acting on the substrate. The liquid measuring device disclosed in this invention can be used to measure the weight of raw and return solutions, as well as their chemical parameters, including pH (acidity / alkalinity) and EC (electroconductivity).

[0041] The following will refer to Figures 1-5 A liquid measuring device according to a preferred embodiment of the present invention will be described in detail.

[0042] like Figure 1 As shown, the liquid measuring device 100 includes a liquid collection container. In the illustrated embodiment, the liquid collection container includes a raw liquid container 110 and a return liquid container 120. The raw liquid container 110 and the return liquid container 120 may also be referred to as a "raw liquid tank" and a "return liquid tank," respectively, in this application. These two containers preferably have the same specifications. The raw liquid container 110 is used to collect and store raw liquid from the irrigation system, and the return liquid container 120 is used to collect and store return liquid flowing back from the planting area.

[0043] Continue to refer to Figure 1 The liquid measuring device 100 also includes a first support device 210 and a weighing device 220 mounted on the first support device 210. The first support device 210 can be configured as a horizontally extending crossbar connected to the device frame. Two independent weighing devices 220 are arranged side by side below the first support device 210, corresponding to the original liquid container 110 and the return liquid container 120, respectively. That is, an independent weighing device 220 is provided for each container.

[0044] Preferably, the weighing device 220 is constructed as a cantilever beam electronic scale sensor. The weighing device 220 is fixedly connected to the lower part of the first support device 210. A downwardly extending cantilever bracket 221 is provided at the bottom of the weighing device 220, and a first suspension part 222 (such as a hook) is provided at the end of the cantilever bracket 221. (Continue to refer to...) Figure 1To maintain the stability and weighing accuracy of the suspended liquid collection container, in the illustrated embodiment, a connecting arm 224 is also fixed to the first support device 210, and a second suspension part 223 (such as a hook) is provided at the end of the connecting arm 224. The first suspension part 222 and the second suspension part 223 are located on opposite sides of the upper port edge of the container (taking the original liquid container 110 as an example), and can jointly suspend the container to form a stable two-point suspension, so that the weight of the container can be reliably transferred to the weighing device 220. In other embodiments not shown, the weighing device 220 can also be constructed as an S-shaped electronic scale sensor.

[0045] To ensure the stability of the liquid collection container during movement of the liquid measuring device 100, the liquid measuring device 100 also includes a clamping device 230. For example... Figure 4 and Figure 5 As shown, the clamping device 230 includes a vertically arranged second support device 233 and a horizontally arranged crossbeam 234. The crossbeam 234 is slidably mounted on the second support device 233 by locking bolts or clamps (not shown) and can move up and down along the second support device 233 to lock and fix it after being adjusted to the height suitable for the liquid collection container, ensuring that the first clamping clamp 231 and the second clamping clamp 232 can be aligned with the appropriate position of the liquid collection container during installation. The clamping device 230 also includes two parallel guide posts 235 and clamping clamps connected to the two guide posts 235. The two guide posts 235 are respectively fixed at both ends of the crossbeam 234. In the illustrated embodiment, the two guide posts 235 are located outside the original liquid container 110 and the return liquid container 120, respectively.

[0046] The clamping device 230 includes a first clamping clamp 231 and a second clamping clamp 232. The first clamping clamp 231 and the second clamping clamp 232 are configured corresponding to the two containers, the original liquid container 110 and the return liquid container 120. That is, the original liquid container 110 and the return liquid container 120 share a single elongated first clamping clamp 231 and an elongated second clamping clamp 232. The first clamping clamp 231 and the second clamping clamp 232 are slidably mounted on two guide posts 235. For example, the first clamping clamp 231 and the second clamping clamp 232 may be provided with sliding holes that match the guide posts 235, thereby facilitating sliding on the guide posts 235. Preferably, the inner surfaces (facing the liquid collection container) of the first clamping clamp 231 and the second clamping clamp 232 are provided with a shape adapted to the outer wall contour of the liquid collection container to ensure a large contact area, uniform force distribution, and avoidance of damage to the container during clamping. Figure 5 As shown in the illustrated embodiment, the original liquid container 110 and the return liquid container 120 have generally circular cross-sections, and the first clamping clamp 231 and the second clamping clamp 232 have arc-shaped clamping surfaces adapted to the outer wall contours of the original liquid container 110 and the return liquid container 120.

[0047] like Figure 4 and Figure 5 As shown, the clamping device 230 also includes a transmission device 250 connected to the first clamping clamp 231 and the second clamping clamp 232, and an actuator 240 connected to the transmission device 250. The actuator 240 can simultaneously drive the first clamping clamp 231 and the second clamping clamp 232 to move via the transmission device 250.

[0048] Preferably, such as Figure 5 As shown, the transmission device 250 includes a bidirectional lead screw 251. The bidirectional lead screw 251 can be mounted parallel to two guide posts 235 via a bearing housing (not shown), and is located in the gap between the raw liquid container 110 and the return liquid container 120. The bidirectional lead screw 251 consists of a left-handed screw section 252, a right-handed screw section 253, and a coupling 254 connecting the left-handed screw section 252 and the right-handed screw section 253. A left-handed nut 255 is fixedly mounted on the first clamping clamp 231, and a right-handed nut 256 is fixedly mounted on the second clamping clamp 232. The left-handed nut 255 is threadedly connected to the left-handed screw section 252, and the right-handed nut 256 is threadedly connected to the right-handed screw section 253.

[0049] The actuation device 240 is configured as an operating lever located at one end of the bidirectional lead screw 251. By manually or electrically rotating this operating lever, the entire bidirectional lead screw 251 can be driven to rotate around its axis, thereby causing the first clamping jaw 231 and the second clamping jaw 232 to move in opposite directions or in opposite directions. Figure 4 and Figure 5 As shown, the front end of the actuator 240 is supported by a steel plate strip fixed to the bottom beam of the machine, and is restricted by retaining rings 257 and 258 installed on the shaft at the front and rear of the steel plate. This ensures that when the actuator 240 is adjusted, whether it is clamped or loosened, the entire clamping device is restricted by the threads and cannot move back and forth freely.

[0050] In actual operation, when it is necessary to weigh the liquid in the original liquid container 110 or the return liquid container 120, the operator can, for example, rotate the actuator 240 counterclockwise, and the bidirectional lead screw 251 will rotate counterclockwise accordingly. Since the threads of the left-hand screw section 252 and the right-hand screw section 253 have opposite directions of rotation, the left-hand nut 255 drives the first clamping clamp 231 to move away from the container along the guide post 235, while the right-hand nut 256 drives the second clamping clamp 232 to move away from the container along the guide post 235. The two clamping clamps move synchronously in opposite directions until they are completely out of contact with the liquid collection container, and are in a position similar to... Figure 5 The release position is shown. At this time, the original liquid container 110 and the return liquid container 120 are freely suspended by the first suspension part 222 and the second suspension part 223, without any lateral constraints, and the weighing device 220 can accurately measure their weight changes.

[0051] When weighing is complete or the entire liquid measuring device 100 needs to be moved, to prevent the liquid collection container from shaking, the operator can, for example, rotate the actuator 240 clockwise, causing the bidirectional lead screw 251 to rotate clockwise as well. The left-hand nut 255 drives the first clamping clamp 231 to move along the guide post 235 toward the container, while the right-hand nut 256 drives the second clamping clamp 232 to move along the guide post 235 toward the container. The two clamping clamps move synchronously towards each other. Once the arc-shaped clamping surface inside the clamping clamps contacts the outer wall of the container, the actuator 240 can be rotated further, and the two clamping clamps will continue to apply clamping force until the original liquid container 110 and the return liquid container 120 are firmly clamped in the middle. At this point, the liquid collection container is completely fixed and cannot shake. During handling or transportation, even if vibration or tilting occurs, the shaking of the container is effectively suppressed, and the lateral force or impact force acting on the weighing device 220 is reduced, thereby protecting the weighing device 220.

[0052] When you want to change the liquid collection container to a different height, you can first loosen the locking mechanism between the crossbeam 234 and the second support device 233, and move the crossbeam 234 together with the guide post 235, clamping clamp, and double screw 251 up and down as a whole, so that the clamping surface of the clamping clamp is roughly aligned with the middle of the liquid collection container or other suitable clamping position, and then re-lock the crossbeam 234.

[0053] Return to reference Figure 1 In a preferred embodiment, the liquid measuring device 100 further includes a measuring container 130. The measuring container 130 is a precision cavity with a small volume (e.g., 50 ml), which may also be referred to as a "measuring pool" in this application. The measuring container 130 is provided with a first inlet 131 and a second inlet 132 communicating with its internal cavity, wherein the original liquid container 110 can be connected to the first inlet 131 via a first conduit 133, and the return liquid container 120 can be connected to the second inlet 132 via a second conduit 134. The first conduit 133 and the second conduit 134 are arranged independently of each other, such as... Figure 1 As shown, the first pipeline 133 extends from the bottom of the raw liquid container 110 to the first inlet 131 of the measuring container 130, and the second pipeline 134 extends from the bottom of the return liquid container 120 to the second inlet 132 of the measuring container 130.

[0054] The liquid measuring device 100 also includes a first pumping device P1 and a second pumping device P2. The first pumping device can pump the original liquid in the original liquid container 110 to the measuring container 130 through the first pipeline 133, and the second pumping device can pump the return liquid in the return liquid container 120 to the measuring container 130 through the second pipeline 134.

[0055] The liquid measuring device 100 also includes a parameter measuring device 140, which preferably includes a pH meter and an EC meter, thereby enabling the measurement of the pH and EC of the liquid. Preferably, the pH meter and the EC meter are hermetically installed in a pre-drilled hole at the top of the measuring container 130, with their respective sensing portions completely immersed in the lower half of the internal space of the measuring container 130, thereby ensuring adequate coverage even with the smallest volume of liquid being measured.

[0056] like Figure 1 and Figure 3 As shown, the liquid measuring device 100 also includes two one-way isolation devices 150 corresponding to the first pipeline 133 and the second pipeline 134, respectively. The two one-way isolation devices 150 are connected to the measuring container 130 at the first inlet 131 and the second inlet 132, respectively, and are connected to the ends of the first pipeline 133 and the second pipeline 134, respectively. The two one-way isolation devices 150 have identical structures; the structure of the one-way isolation device 150 will be described in detail below using the first inlet 131 and the first pipeline 133 as examples.

[0057] like Figure 3 As shown, the one-way isolation device 150 mainly includes a valve body 152, an actuator 153, and an isolation plug 151. The valve body 152 is a hollow cylindrical part with a flow channel 154 machined inside for liquid flow. The flow channel 154 has an inlet 155 and an outlet 156 respectively located at both ends of the valve body 152. The valve body 152 is tightly connected to the first pipeline 133 at the end where the inlet 155 is located, and the valve body 152 is connected to the measuring container 130 at the end where the outlet 156 is located. Preferably, the one-way isolation device 150 is detachably connected to the measuring container 130 to facilitate subsequent maintenance of the one-way isolation device 150. In a preferred embodiment, the outer wall of the valve body 152 is provided with an external thread, and the inner wall of the measuring container 130 forming the first inlet 131 is provided with an internal thread that mates with the external thread, so that the valve body 152 can be screwed into the inlet of the measuring container 130, thereby achieving a detachable connection and facilitating subsequent maintenance. It is understood that in other embodiments, the one-way isolation device 150 may also be detachably connected to the measuring container 130 by other means, such as snap-fit ​​connection.

[0058] Actuator 153 is housed inside valve body 152, such as Figure 3As shown, the actuator 153 includes a guide post 158 ​​and an elastic element 157 disposed outside the guide post 158. The elastic element 157 can be, for example, a helical spring, and the guide post 158 ​​can pass through the central hole of the helical spring. A limiting portion 158a is provided at one end of the guide post 158 ​​near the inlet 155, and this limiting portion 158a protrudes radially outward relative to the guide post 158. A spring seat 159 is also provided inside the valve body 152, and this spring seat 159 can be constructed as an annular stepped structure. The helical spring is disposed between the spring seat 159 and the limiting portion 158a of the guide post 158, and preferably can be in a compressed state, so that a preload force tending to close the outlet 156 can always be applied to the guide post 158 ​​and the isolating plug 151 thereon, thereby keeping the first inlet 131 normally closed. In a preferred embodiment, the actuator 153 is disposed upstream of the outlet 156 along the flow direction of the fluid in the flow channel 154, and the isolation plug 151 is disposed downstream of the outlet 156 along the flow direction.

[0059] Further reference Figure 3 An isolating plug 151 is fixedly connected to the end of the guide post 158 ​​opposite to the limiting portion 158a. The isolating plug 151 has a protruding structure 151a extending toward the outlet 156, which extends into the valve body 152 when the isolating plug 151 is in a sealed state sealing the outlet 156. The protruding structure 151a is preferably constructed in a frustum shape, with an inclined first guide surface 151b on its side. Correspondingly, the inner edge of the outlet 156 of the valve body 152 is provided with a second guide surface 152a that mates with the first guide surface 151b. This design facilitates smoother entry of the isolating plug 151 into the valve body 152 to close the outlet 156. Preferably, the one-way isolating device 150 further includes a first sealing element 161 disposed on the first guide surface 151b or the second guide surface 152a. The first sealing element 161 is constructed as an annular elastic sealing ring, thereby sealing the gap between the isolating plug 151 and the valve body 152.

[0060] Preferably, the one-way isolation device 150 further includes a second seal 162, which can also be constructed as an annular elastic sealing ring. The second seal 162 is disposed on the upstream side of the valve body 152 relative to the external thread on the outer wall of the valve body 152 (i.e., the connection between the valve body 152 and the measuring container 130) along the flow direction of the fluid. When the one-way isolation device 150 is installed to the measuring container 130, the second seal 162 seals against the inner wall of the measuring container 130 that forms the first inlet 131, achieving a seal at the first inlet 131 and preventing liquid from seeping out from the thread gap.

[0061] In actual operation, when the corresponding pumping device is started, the liquid is drawn out from the raw liquid container 110, flows through the first pipeline 133, and then acts on the limiting part 158a at one end of the guide post 158, pushing the entire actuator 153 to move towards the outlet 156. The isolation plug 151 moves accordingly, and the helical spring is further compressed. The first guide surface 151b of the protruding structure 151a of the isolation plug 151 separates from the second guide surface 152a of the valve body 152, forming an annular gap through which the liquid can flow into the measuring container 130.

[0062] When the corresponding pumping device stops, the liquid pressure in the flow channel 154 drops sharply. The compressed helical spring immediately releases its elastic force, pushing the guide post 158 ​​and the isolation plug 151 to quickly return to their original position towards the inlet 155. The protruding structure 151a of the isolation plug 151 re-seated into the outlet 156 of the valve body 152, and the first seal 161 is tightly pressed between the first guide surface 151b and the second guide surface 152a, forming a tight mechanical seal. The residual liquid in the one-way isolation device 150 and the first pipeline 133 is completely isolated from the internal space of the measuring container 130. Preferably, in this state, the end face of the isolation plug 151 is approximately flush with or slightly protrudes from the inner wall of the measuring container 130.

[0063] Return to reference Figure 1 and Figure 2 The measuring container 130 has an outlet 135 communicating with its internal cavity and a third pipe 136 communicating with the outlet 135, located on its upper side wall. The outlet 135 is slightly lower than the top of the measuring container 130, and this position of the outlet 135 is designed to form a flushing overflow channel. During operation, when the pumped liquid has essentially filled the measuring container 130, and there is no more liquid to be contained, it will overflow from the higher outlet 135 and be discharged through the third pipe 136. This overflow process can effectively flush the entire inner wall of the measuring container 130. A first one-way valve 181 is provided on the third pipe 136. The first one-way valve 181 is configured to allow liquid to flow only from the measuring container 130 to the drain port at the end of the third pipe 136, so as to discharge the liquid to the outside.

[0064] In addition, a cleaning outlet 137 and a fourth pipe 138 connected to the cleaning outlet 137 are provided at or below the bottom of the measuring container 130. Positioning the cleaning outlet 137 below the measuring container 130 ensures that the liquid can be completely and thoroughly discharged under gravity or pumping during evacuation operations, avoiding residue. A third pumping device P3 is installed on the fourth pipe 138, which can discharge the liquid in the measuring container 130 through the cleaning outlet 137 and the fourth pipe 138.

[0065] like Figure 1As shown, the fourth pipe 138 is connected to the third pipe 136, and the connection port 138a between the two is located downstream of the first check valve 181. In a preferred embodiment, the liquid measuring device 100 further includes a fifth pipe 139 connected to the third pipe 136, and the fifth pipe 139 is located upstream of the first check valve 181. A second check valve 182 is installed at the inlet end of the fifth pipe 139. The second check valve 182 is configured to be openable in a first direction from the inlet end to the connection port 139a between the fifth pipe 139 and the third pipe 136, and not openable in a second direction opposite to the first direction. This configuration allows the second check valve 182 to allow air to enter the third pipe 136 while preventing liquid from flowing out of the third pipe 136.

[0066] The liquid measuring device also includes a control unit (MCU controller), which is electrically connected to the first pumping device P1, the second pumping device P2, and the third pumping device P3, and is configured to control the first pumping device P1, the second pumping device P2, and the third pumping device P3 to operate alternately. Furthermore, the control unit is also electrically connected to a parameter measuring device and a weighing device, and is capable of receiving measurement signals fed back from the parameter measuring device and the weighing device.

[0067] The following section describes in detail a liquid measurement method for measuring liquid parameters using the aforementioned liquid measuring device. This liquid measurement method mainly includes the following steps: Step S1: Monitor the status of the raw liquid container and the return liquid container, and determine whether the conditions for starting the pumping operation are met based on the status of the raw liquid container and the return liquid container.

[0068] In this step, the control device is configured to monitor the status of the raw liquid container and the return liquid container. In one embodiment, the status of the raw liquid container and the return liquid container is their weight data. The control device can read the weight data fed back from the two weighing devices in real time to monitor the weight of the raw liquid container and the return liquid container. When the weight of the raw liquid container or the return liquid container reaches its respective weight threshold, it is determined that the conditions for starting pumping are met. For example, the control device can be set to trigger the corresponding measurement task when the weight of the raw liquid container reaches approximately 300 grams, or when the weight of the return liquid container reaches approximately 200 grams. This procedure ensures that a sufficient sample is available for each parameter measurement.

[0069] Since the flow rate of the undiluted liquid is typically greater than that of the return liquid, it is preferable to assign a higher response level to the undiluted liquid for timely monitoring. That is, when both the undiluted liquid container and the return liquid container simultaneously reach their respective weight thresholds, the control device can prioritize the parameter measurement task of the undiluted liquid.

[0070] When the weight of the original liquid container or the return liquid container reaches the weight threshold, step S11 is executed: It is determined whether the target liquid to be tested (i.e., the liquid in the original liquid container or the return liquid container that has reached the weight threshold) is the same liquid as the liquid previously pumped into the measuring container. For example, when the weight of the original liquid container reaches the weight threshold, the target liquid to be tested is the original liquid, and the system can determine whether the original liquid to be tested is the same liquid as the liquid previously pumped into the measuring container. If the two liquids are the same liquid, it is determined that the environment inside the measuring container is compatible with the target liquid to be tested, and no emptying or cleaning operation is required. The system directly executes step S2: pumping a predetermined volume of the target liquid to be tested into the measuring container for parameter measurement.

[0071] If the two liquids are different types of liquids, then step S12 is performed: the measuring container is emptied of the previous liquid. This step is mainly used to actively empty the previous liquid in the measuring container 130, thereby removing any residue of the previous liquid in the measuring container to avoid mixing with the new liquid to be tested and causing interference with chemical parameters. During the emptying operation, the control device activates the third pumping device P3. This third pumping device completely pumps out all the remaining liquid in the measuring container 130 through the emptying outlet 137 via the fourth pipeline 138. At the same time, external air enters through the fifth pipeline 139 and the second one-way valve 182, replenishing the third pipeline 136 and the measuring container 130, ensuring that the liquid in the measuring container 130 is completely emptied without any residue.

[0072] In a preferred embodiment, a liquid flag can be set in the control device. For example, "0" can be used to identify the original liquid and "1" can be used to identify the return liquid. When the original liquid is pumped into the measuring container, the control device stores the flag as "0", and when the return liquid is pumped into the measuring container, the control device changes the stored flag to "1". In this way, the control device can easily determine whether the liquid to be tested is the same liquid as the previous liquid.

[0073] After step S12 is completed, step S13 can be performed: rinsing the measuring container. In a preferred embodiment, the rinsing operation includes the following steps: First, a predetermined volume of target liquid (taking the stock solution as an example) is pumped into the measuring container 130. In this step, the control device activates the first pumping device P1, and the stock solution is drawn from the stock solution container 110, flows through the first pipeline 133, pushes open the isolation plug 151 in the corresponding one-way isolation device 150, and enters the measuring container 130. Preferably, the predetermined volume pumped is greater than the volume of the measuring container 130. For example, if the measuring container 130 has a capacity of 50 ml, 100 ml of stock solution can be pumped into the measuring container 130.

[0074] Then, the original liquid is discharged through the outlet 135 located above the side wall of the measuring container 130. This step is mainly used to flush and overflow the measuring container 130. During operation, when the measuring container 130 is basically filled with liquid, the subsequently pumped liquid cannot be contained, allowing the liquid to overflow from the higher outlet 135, enter the third pipeline 136, open the first one-way valve 181, and be discharged outside the measuring container 130. This overflow process can effectively flush the inner wall of the measuring container 130 and the surface of the measuring instrument immersed in it, thereby carrying away residual components (such as backflow liquid) from the previous measurement.

[0075] Next, the remaining stock solution is emptied through the empty outlet 137 located below the measuring container 130. This step is mainly used to actively empty the liquid in the measuring container 130. When the first pumping device stops, the isolation plug 151 of the corresponding one-way isolation device 150 instantly closes the outlet 156 under the action of the helical spring to achieve isolation. Subsequently, the control device starts the third pumping device P3. This third pumping device completely draws out all the remaining stock solution in the measuring container 130 through the empty outlet 137 via the fourth pipeline 138. At the same time, external air enters through the fifth pipeline 139 and the second one-way valve 182, replenishing the third pipeline 136 and the measuring container 130, ensuring that the liquid in the measuring container 130 is completely emptied without any residue.

[0076] The above-described rinsing step can be repeated at least once (e.g., once or twice) before the measurement of the stock solution begins. In one embodiment, when it is intended to measure the stock solution, the control device can control the first pumping device to restart, pumping just the required volume of stock solution into the measuring container 130 for parameter measurement. In other embodiments, a sufficient volume of stock solution may be reserved in the previous rinsing step for measurement; those skilled in the art can configure this according to actual needs.

[0077] During measurement, the parameter measuring device 140 can read the pH value and EC value of the liquid, and feed back the measurement results, the weight of the liquid, the liquid marker and the time tag to the control device for storage and subsequent operation.

[0078] In a preferred embodiment, after the target liquid completes one measurement cycle, the target liquid is preferably retained in the measuring container, thereby keeping the pH meter and EC meter continuously immersed until the next parameter measurement of the target liquid begins. This extends the service life of the pH meter and EC meter.

[0079] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, or improvements made to the technical solutions of the present invention within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0080] The above description of various embodiments of the present invention is provided for illustrative purposes to a person skilled in the art. It is not intended to limit the invention to a single disclosed embodiment. As taught above, those skilled in the art will understand various alternatives and variations of the invention. Therefore, although some alternative embodiments have been specifically described, those skilled in the art will understand or relatively easily develop other embodiments. The present invention is intended to include all alternatives, modifications, and variations of the invention described herein, as well as other embodiments falling within the spirit and scope of the invention described above.

Claims

1. A liquid measuring device, characterized in that, include: A first support device (210) is provided in a horizontal direction; Weighing device (220), the weighing device (220) is connected to the first support device (210), the weighing device (220) has a cantilever bracket (221), and the end of the cantilever bracket (221) is provided with a first suspension part (222). A liquid collection container, which is suspended on the first suspension part (222), such that the weighing device (220) can calculate the weight of the liquid collection container by measuring the load transmitted by the first suspension part (222); as well as The clamping device (230) includes at least one clamping clamp that is movable between a clamping position and a release position, wherein the at least one clamping clamp is configured to be able to fit tightly against the liquid collection container to clamp the liquid collection container when in the clamping position, and to be able to move away from the liquid collection container when in the release position.

2. The liquid measuring device according to claim 1, characterized in that, The liquid measuring device further includes a second suspension part (223) and a connecting arm (224) connected to the second suspension part (223). The connecting arm (224) is connected to the first support device (210). The second suspension part (223) and the first suspension part (222) together suspend the liquid collection container.

3. The liquid measuring device according to claim 2, characterized in that, The first suspension part (222) and the second suspension part (223) are respectively suspended on opposite sides of the upper port edge of the liquid collection container.

4. The liquid measuring device according to claim 1, characterized in that, The at least one clamping clamp includes a first clamping clamp (231) and a second clamping clamp (232), the first clamping clamp (231) and the second clamping clamp (232) are respectively disposed on opposite sides of the liquid collection container, and the first clamping clamp (231) and the second clamping clamp (232) respectively have clamping surfaces adapted to the outer wall contour of the liquid collection container.

5. The liquid measuring device according to claim 4, characterized in that, The clamping device (230) further includes an actuation device (240) configured to simultaneously drive the movement of the first clamping jaw (231) and the second clamping jaw (232).

6. The liquid measuring device according to claim 5, characterized in that, The clamping device (230) further includes a transmission device (250) connected to the actuation device (240), the transmission device (250) being connected to the first clamping jaw (231) and the second clamping jaw (232), wherein the actuation device is configured to drive the movement of the first clamping jaw (231) and the second clamping jaw (232) via the transmission device.

7. The liquid measuring device according to claim 6, characterized in that, The transmission device includes a two-way lead screw (251), which includes a left-handed screw section (252), a right-handed screw section (253), and a coupling (254) connecting the left-handed screw section (252) and the right-handed screw section (253). A left-handed nut (255) that mates with the left-handed screw section (252) is fixedly provided on the first clamping clamp (231), and a right-handed nut (256) that mates with the right-handed screw section (253) is fixedly provided on the second clamping clamp (232). The left-hand screw section (252) and the right-hand screw section (253) are respectively threaded to the left-hand nut (255) and the right-hand nut (256), so that when the bidirectional screw (251) rotates around its axis, the first clamping clamp (231) and the second clamping clamp (232) can move synchronously towards or away from each other.

8. The liquid measuring device according to claim 7, characterized in that, The actuation device (240) includes an operating lever disposed at one end of the bidirectional lead screw (251) for applying rotational force.

9. The liquid measuring device according to claim 7, characterized in that, The clamping device (230) further includes: The second support device (233) is arranged in a vertical direction; A crossbeam (234) is disposed on the second support device (233) and configured to slide up and down along the second support device (233); Guide post (235), which is fixedly connected to the crossbeam (234). The first clamp (231) and the second clamp (232) are both connected to the guide post (235) and arranged perpendicularly to the guide post (235). The first clamp (231) and the second clamp (232) are slidably disposed on the guide post (235).

10. The liquid measuring device according to claim 9, characterized in that, The liquid collection container includes a raw liquid container (110) and a return liquid container (120), which are arranged side by side. The liquid measuring device includes two weighing devices (220) for weighing the raw liquid container (110) and the return liquid container (120) respectively.

11. The liquid measuring device according to claim 10, characterized in that, The bidirectional lead screw (251) is disposed between the original liquid container (110) and the return liquid container (120). The clamping device (230) includes two guide posts (235), which are respectively disposed outside the original liquid container (110) and outside the return liquid container (120). The two guide posts (235) are fixed to the crossbeam (234) in parallel with each other. The bidirectional lead screw (251) is parallel to the two guide posts (235).

12. The liquid measuring device according to claim 10, characterized in that, The liquid measuring device further includes a measuring container (130) and a parameter measuring device (140). The measuring container (130) is provided with a first inlet (131) and a second inlet (132) communicating with its internal space. The original liquid container (110) is connected to the first inlet through a first pipeline (133), and the return liquid container (120) is connected to the second inlet through a second pipeline (134). The liquid measuring device further includes a first pumping device and a second pumping device. The first pumping device is configured to pump the liquid in the original liquid container (110) to the measuring container (130) through the first pipeline. The second pumping device is configured to pump the liquid in the return liquid container (120) to the measuring container (130) through the second pipeline. The parameter measuring device (140) is disposed in the measuring container (130) and configured to perform parameter measurement on the liquid in the measuring container (130).

13. The liquid measuring device according to claim 12, characterized in that, The liquid measuring device further includes two one-way isolation devices (150), which are connected to the measuring container (130) at the first inlet and the second inlet, respectively, and are connected to the ends of the first pipeline and the second pipeline, respectively.

14. The liquid measuring device according to claim 13, characterized in that, The one-way isolation device (150) is detachably connected to the measuring container (130).

15. The liquid measuring device according to claim 13, characterized in that, The one-way isolation device (150) includes: an isolation plug (151), a valve body (152), and an actuator (153) disposed in the valve body (152). The actuator (153) is connected to the isolation plug (151). A flow channel (154) is formed inside the valve body (152). The flow channel (154) has an inlet (155) disposed at one end of the valve body and an outlet (156) disposed at the other end of the valve body. The valve body (152) is connected to the first pipeline (133) or the second pipeline (134) at the inlet (155). The valve body (152) is connected to the measuring container (130) at the outlet (156). The isolation plug can seal the outlet under the action of the actuator.

16. The liquid measuring device according to claim 15, characterized in that, The actuator (153) is disposed upstream of the outlet (156) along the flow direction of the fluid in the flow channel, and the isolation plug (151) is disposed downstream of the outlet (156) along the flow direction.

17. The liquid measuring device according to claim 15, characterized in that, The actuator (153) includes an elastic element (157) and a guide post (158), one end of which is connected to the isolation plug (151). The elastic element (157) is capable of acting on the guide post (158) to provide a preload force that causes the isolation plug (151) to tend to close the outlet (156).

18. The liquid measuring device according to claim 17, characterized in that, The valve body (152) is provided with a spring seat (159), and the end of the guide post (158) near the inlet (155) is provided with a limiting part (158a) that protrudes outward in the radial direction relative to the guide post. The elastic element is disposed between the spring seat (159) and the limiting part (158a).

19. The liquid measuring device according to claim 15, characterized in that, The isolation plug (151) has a protruding structure (151a) extending toward the outlet (156). When the isolation plug (151) is in a sealed state that seals the outlet (156), a portion of the protruding structure (151a) extends into the valve body (152). The protruding structure (151a) has an inclined first guide surface (151b), and the valve body (152) has an inclined second guide surface (152a) that mates with the first guide surface (151b).

20. The liquid measuring device according to claim 19, characterized in that, The unidirectional isolation device (150) further includes a first seal (161), which is disposed on the first guide surface (151b) or the second guide surface (152a).

21. The liquid measuring device according to claim 15, characterized in that, The outer wall of the valve body (152) is provided with an external thread, and the inner walls of the first inlet (131) and the second inlet (132) of the measuring container (130) are respectively provided with internal threads that mate with the external threads.

22. The liquid measuring device according to claim 21, characterized in that, The one-way isolation device (150) further includes a second seal (162), which is disposed on the upstream side of the valve body (152) relative to the external thread along the flow direction. When the one-way isolation device (150) is installed to the measuring container, the second seal (162) seals against the inner wall of the measuring container forming the first inlet (131) or the second inlet (132).

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