Liquid injection pump compensation device and liquid injection pump

Abstract

The utility model discloses a liquid injection pump compensation device and a liquid injection pump, the liquid injection pump compensation device comprises a test chamber, the test chamber is hollow to form a test cavity, two opposite side wall surfaces of the test chamber are respectively provided with a liquid inlet and a liquid outlet, and the upper end of the test chamber is provided with a mounting block; the pressure sensor is connected with the mounting block, the sensing end of the pressure sensor extends into the test cavity, and the pressure sensor is used for collecting the real-time pressure value of the liquid in the test cavity; the temperature sensor is connected with the mounting block, the sensing end of the temperature sensor extends into the test cavity, and the temperature sensor is used for collecting the real-time temperature value of the liquid in the test cavity; the controller is electrically connected with the pressure sensor and the temperature sensor; and the display screen is electrically connected with the controller and is used for displaying a change curve of the real-time pressure value and a change curve of the real-time temperature value. The device can monitor the pressure and the temperature of liquid so as to ensure that the filling amount is qualified.

Description

TECHNICAL FIELD

[0001] The utility model relates to filling equipment technical field, especially liquid injection pump compensation device and liquid injection pump. BACKGROUND

[0002] In the process of using liquid injection pump to carry out filling product production and processing, the pressure of liquid through the liquid injection pump can be influenced by factors such as liquid outlet valve opening degree, and the temperature can be influenced by factors such as environment, but the operator is difficult to monitor the condition inside the liquid injection pump, and the operator cannot learn in time and make corresponding adjustment measures for the change of the pressure or temperature of the liquid in the liquid injection pump. Because the liquid outlet valve of the liquid outlet pipeline of the liquid injection pump cannot be completely opened, the liquid pressure rises, which can cause the filling amount to be inaccurate, and even the pump body of the liquid injection pump can be stuck and the pipeline can be damaged. The density of the liquid changes at different temperatures, and the liquid density is proportional to the mass, when the liquid injection pump carries out equal volume liquid filling, the change of temperature will cause the product weight fluctuation to not meet the technical requirements, and even cause large quantities of product to be scrapped. SUMMARY

[0003] The utility model aims at at least solving one of the technical problems existing in the prior art. For this purpose, the utility model provides liquid injection pump compensation device and liquid injection pump.

[0004] The solution of the technical problem of the utility model is as follows:

[0005] In the first aspect, a liquid injection pump compensation device is provided, which is applied to the inlet or outlet of the liquid injection pump, and the liquid injection pump compensation device comprises:

[0006] A test chamber is hollow to form a test cavity, opposite two side walls of the test chamber are respectively provided with a liquid inlet and a liquid outlet, and an upper end of the test chamber is provided with a mounting block;

[0007] A pressure sensor is connected with the mounting block, an inductive end of the pressure sensor extends into the test cavity, and the pressure sensor is used to collect the real-time pressure value of the liquid in the test cavity;

[0008] A temperature sensor is connected with the mounting block, an inductive end of the temperature sensor extends into the test cavity, and the temperature sensor is used to collect the real-time temperature value of the liquid in the test cavity;

[0009] A controller is electrically connected with the pressure sensor and the temperature sensor respectively;

[0010] A display screen is electrically connected with the controller, and the display screen is used to display the change curve of the real-time pressure value and the change curve of the real-time temperature value.

[0011] The utility model discloses at least has the following beneficial effects: liquid enters the test cavity from the liquid inlet and flows out through the liquid outlet, in the process of liquid entering the test cavity, the pressure sensor can gather the real-time pressure value of liquid and signal transmission to the controller, and the temperature sensor can gather the real-time temperature value of liquid and signal transmission to the controller, and the controller controls the display screen to show the change curve of real-time pressure value and the change curve of real-time temperature value of liquid according to real-time pressure value and real-time temperature value, and the operator can know the pressure change and temperature change of liquid through the display screen, realizes the monitoring of liquid pressure and temperature, the operator can judge whether the liquid outlet pipeline in the liquid injection pump has the fault according to the pressure change, and removes the fault in time, avoids the pump body rotation of liquid injection pump and the pipe damage condition of jamming, also avoids the precision of filling quantity influenced by pressure change, temperature change can influence liquid density, and the temperature of liquid is monitored through the temperature sensor, can determine liquid density according to real-time temperature value, thereby adjusts the liquid volume of liquid outlet, to guarantee that the filling quality meets the technical requirement, improves the qualified rate of filling product.

[0012] As a further improvement of the above technical solution, the test cavity is provided with an inlet pipe, the inlet pipe includes a horizontal flow guide section and a vertical flow guide section, the horizontal flow guide section is connected with the side wall of the test cavity, the inlet end of the horizontal flow guide section is the liquid inlet, the outlet end of the horizontal flow guide section is connected with the inlet end of the vertical flow guide section, the outlet end of the vertical flow guide section is opened upward, the sensing end of the pressure sensor is arranged towards the outlet end of the vertical flow guide section, and there is a flow gap between the sensing end of the pressure sensor and the outlet end of the vertical flow guide section, the flow gap is communicated with the test cavity.

[0013] As a further improvement of the above technical solution, the liquid outlet is arranged at the upper part of the test cavity, and the sensing end of the temperature sensor extends downward to the middle part of the test cavity.

[0014] As a further improvement of the above technical solution, the liquid injection pump compensation device further comprises:

[0015] An alarm is electrically connected with the controller, and when the real-time pressure value is higher than the preset pressure threshold value, the controller controls the alarm to issue an alarm.

[0016] As a further improvement of the above technical solution, the liquid injection pump compensation device further comprises:

[0017] A protective cover is arranged above the mounting block, the protective cover is hollow to form a protection cavity, and the pressure sensor and the temperature sensor are arranged in the protection cavity respectively.

[0018] As a further improvement of the above technical solution, the protective cover is detachably connected with the mounting block.

[0019] As a further improvement of the above technical solution, the pressure sensor and the temperature sensor are respectively detachably connected with the mounting block.

[0020] As a further improvement of the above technical solution, the test chamber comprises an end cover and a test body, the end cover is detachably connected with the test body and jointly forms the test cavity.

[0021] As a further improvement of the above technical solution, an outer side wall surface of the test chamber is provided with a connecting head, and the liquid inlet penetrates through the connecting head.

[0022] In a second aspect, a liquid injection pump is provided, comprising the liquid injection pump compensation device according to any one of the above technical solutions. Since the liquid injection pump is provided with the liquid injection pump compensation device, when the liquid injection pump is performing the filling work, the operator can timely learn the state of the liquid injection pump and the liquid inside the liquid injection pump through the display screen, which is beneficial to monitor the filling amount and improve the qualified rate of the filled products. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly described. Obviously, the described drawings are only some of the embodiments of the present application, not all embodiments, and those skilled in the art can obtain other design schemes and drawings according to these drawings without creative labor.

[0024] Figure 1 is the overall structure schematic diagram of the liquid injection pump compensation device of the embodiment of the present application;

[0025] Figure 2 is the overall structure schematic diagram of the liquid injection pump compensation device of the embodiment of the present application from another angle;

[0026] Figure 3 is the front view of the liquid injection pump compensation device of the embodiment of the present application;

[0027] Figure 4 is the left view of the liquid injection pump compensation device of the embodiment of the present application;

[0028] Figure 5 is Figure 4 the sectional view in A-A direction.

[0029] Fig. 1 is a test chamber; 110 is a liquid inlet; 111 is a connecting head; 112 is a liquid inlet pipe; 120 is a liquid outlet; 130 is an end cover; 131 is a second sealing ring; 140 is a test body; 150 is a test cavity; 200 is a mounting block; 300 is a protective cover; 310 is a protective cavity; 400 is a pressure sensor; 500 is a temperature sensor. DETAILED DESCRIPTION

[0030] The embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only, and are used only for explaining the present application, and should not be understood as limiting the present application.

[0031] In the description of the present application, if the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0032] In the description of the present application, the meaning of several is one or more, the meaning of multiple is more than two, greater than, less than, more than, etc. are understood as not including the number, above, below, etc. are understood as including the number. If it is described as first, second, it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of technical features indicated.

[0033] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical scheme.

[0034] Obviously, the described embodiments are only part of the embodiments of the present application, not all embodiments, based on the embodiments of the present application, other embodiments obtained by the person skilled in the art without creative labor are all within the scope of protection of the present application. The various technical features in the present application can be combined interactively without mutual contradiction and conflict.

[0035] In the first aspect, with reference to Figures 1 to 5 The embodiment of the present application provides a compensation device for liquid injection pump, which is applied to the inlet or outlet of the liquid injection pump, can assist the liquid injection pump to perform filling work, so that the operator can timely know the state of the liquid injection pump and the liquid in the liquid injection pump, and the filling amount can be monitored, and the qualified rate of the filled product is improved.

[0036] In the embodiment, the liquid injection pump compensation device comprises a test chamber 100, a pressure sensor 400, a temperature sensor 500, a controller and a display screen. The test chamber 100 is provided with a test cavity 150, an inlet 110 and an outlet 120. The liquid is filled into the test cavity 150 through the inlet 110 and flows out of the test cavity 150 through the outlet 120. The pressure sensor 400 and the temperature sensor 500 are connected to a mounting block 200 provided at the upper end of the test chamber 100. The sensing end of the pressure sensor 400 extends into the test cavity 150 through the upper wall of the test cavity 150, and the sensing end of the temperature sensor 500 extends into the test cavity 150 through the upper wall of the test cavity 150.

[0037] In the embodiment, the display screen is electrically connected to the controller. The pressure sensor 400 is used to collect the real-time pressure value of the liquid in the test cavity 150 and is electrically connected to the controller. After the pressure sensor 400 collects the real-time pressure value of the liquid in the test cavity 150, the signal can be transmitted to the controller. The controller obtains the change curve of the real-time pressure value of the liquid in the test cavity 150 according to the real-time pressure value and displays the change curve of the real-time pressure value through the display screen. The temperature sensor 500 is used to collect the real-time temperature value of the liquid in the test cavity 150 and is electrically connected to the controller. After the temperature sensor 500 collects the real-time temperature value of the liquid in the test cavity 150, the signal can be transmitted to the controller. The controller obtains the change curve of the real-time temperature value of the liquid in the test cavity 150 according to the real-time temperature value and displays the change curve of the real-time temperature value through the display screen.

[0038] It can be understood that the display screen displays the change curve of the real-time pressure value in real time. The operator can check whether the liquid filling process is smooth through the display screen and determine whether the liquid pipeline has a fault through the change curve of the real-time pressure value. When the liquid outlet valve of the liquid injection pump outlet pipeline is not completely opened, the pressure of the liquid in the test cavity 150 rises. The operator can learn the pressure change of the liquid from the change curve of the real-time pressure value displayed on the display screen in time, so as to check the liquid outlet valve of the liquid injection pump, eliminate the filling amount error caused by the pressure change, and avoid the situation that the pump body of the liquid injection pump is stuck and the pipeline is damaged.

[0039] In the embodiment, the liquid injection pump is a volume pump, and the filling amount of the liquid injection pump depends on the volume of the liquid. When the density of the liquid changes, even if the volume output of the liquid injection pump does not change, the mass output of the liquid injection pump will change. It can be understood that the density of the liquid changes with the change of the temperature: when the temperature rises, the density of the liquid decreases; on the contrary, when the temperature decreases, the density of the liquid increases. The density change caused by the temperature change will affect the filling amount of the liquid injection pump. The display screen displays the change curve of the real-time temperature value of the inlet or outlet of the liquid injection pump in real time, so as to monitor the fluctuation of the liquid temperature in a reasonable range during the whole liquid injection filling process, and avoid the fluctuation out of the reasonable range to cause the weight error of the filled product to be out of the reasonable range. When the temperature change of the liquid is large, the error between the density of the liquid and the preset density is too large, the operator can learn the temperature change of the liquid from the change curve of the real-time temperature value displayed on the display screen in time, and the liquid injection pump can determine the density of the liquid according to the temperature change, and automatically adjust the liquid volume of the liquid injection pump according to the newly determined density to realize automatic compensation, so as to ensure that the weight of the filled product is in the preset range and meets the technical requirements, and improve the qualified rate of product production.

[0040] It can be understood that, since the liquid injection pump compensation device is applied to the inlet or outlet of the liquid injection pump, and the test chamber 100 is connected to the outlet or inlet of the pump body of the liquid injection pump, the temperature of the liquid tested in the test cavity 150 is close to the temperature of the volume cavity of the pump body, so that the large heat exchange of the medium is effectively avoided, thereby avoiding the inconsistency between the test temperature and the volume cavity temperature for determining the final liquid injection amount.

[0041] In some embodiments, referring to Figure 5 , the pressure sensor 400 is arranged on one side close to the liquid inlet 110, and the temperature sensor 500 is arranged on one side close to the liquid outlet 120. In this way, the installation of the pressure sensor 400 and the temperature sensor 500 is more reasonable, the pressure sensor 400 can learn the pressure of the liquid when the liquid enters the test cavity 150 in time, and after the liquid completely enters the test cavity 150, the temperature sensor 500 collects the temperature of the liquid again, so that the temperature monitoring of the temperature sensor 500 is more accurate.

[0042] In some embodiments, the test cavity 150 is provided with a liquid inlet pipe 112, the liquid inlet pipe 112 is in an "L" shape, and the liquid inlet pipe 112 includes two mutually perpendicular flow guide segments, i.e., a horizontal flow guide segment and a vertical flow guide segment. The horizontal flow guide segment is connected with the side wall of the test cavity 150, the inlet end of the horizontal flow guide segment is the liquid inlet 110 of the test cavity 150, the outlet end of the horizontal flow guide segment is connected with the inlet end of the vertical flow guide segment, the outlet end of the vertical flow guide segment is opened upward, the sensing end of the pressure sensor 400 is arranged toward the outlet end of the vertical flow guide segment, and the sensing end of the pressure sensor 400 and the outlet end of the vertical flow guide segment have a flow gap therebetween, and the lumen of the liquid inlet pipe 112 and the test cavity 150 are communicated through the flow gap.

[0043] It can be understood that the liquid enters the test chamber 100 through the horizontal flow guide section and flows along the liquid inlet pipe 112 to the flow gap, so that the sensing end of the pressure sensor 400 monitors the pressure of the liquid. After the liquid flows through the flow gap, it enters the test cavity 150. Since the space in the test cavity 150 is larger than the space in the pipeline, the test cavity 150 stores the liquid, which can reduce the heat exchange between the liquid and the outside world, so that the temperature sensor 500 can be delayed to be accurate, and the accuracy of the test is ensured.

[0044] In some embodiments, the liquid outlet 120 is arranged at the upper part of the test cavity 150, and the sensing end of the temperature sensor 500 extends downward to the middle position of the test cavity 150. In this way, the sensing end of the temperature sensor 500 can be completely immersed in the liquid in the test cavity 150, and the temperature monitoring of the liquid is more accurate.

[0045] In some embodiments, the liquid injection pump compensation device further comprises an alarm, which is used to issue an alarm to timely remind the operator of the abnormal condition of the liquid injection pump. It can be understood that the alarm is electrically connected with the controller. When the real-time pressure value transmitted by the pressure sensor 400 to the controller is higher than the preset pressure threshold value, the controller confirms that the liquid outlet pipeline of the pump body has a fault condition, and the controller controls the alarm to issue an alarm.

[0046] Due to the incompressibility of the liquid, in a system that operates stably in a cycle, the pressure in the pipeline presents a stable periodic change. When external factors change, the pressure will change greatly. According to this characteristic, the liquid outlet pipeline system can be monitored. When the pipeline fails or is affected by external factors, the pressure will change greatly. The controller can timely alarm this fault according to the signal output by the pressure sensor 400.

[0047] It can be understood that the alarm can be a component such as a buzzer that issues an alarm through sound, or a component such as an indicator light that issues an alarm through visual prompt. In some embodiments, the alarm issues an alarm through sound and light combination, which includes a buzzer and an indicator light. When the real-time pressure value collected by the pressure sensor 400 is higher than the preset pressure threshold value, the buzzer issues a sharp alarm sound, and the color of the indicator light changes from green to red.

[0048] In some embodiments, the liquid injection pump compensation device further comprises a protective cover 300, which is arranged above the mounting block 200 and hollowly forms a protective cavity 310, and the pressure sensor 400 and the temperature sensor 500 are arranged in the protective cavity 310 respectively. It can be understood that the protective cavity 310 provides mounting space for the pressure sensor 400 and the temperature sensor 500, the protective cover 300 can provide protection for the pressure sensor 400 and the temperature sensor 500, improve the service life of the pressure sensor 400 and the temperature sensor 500, reduce the influence of external environmental factors on the pressure sensor 400 and the temperature sensor 500, and improve the test accuracy of the pressure sensor 400 and the temperature sensor 500.

[0049] In the present embodiment, the pressure sensor 400 and the temperature sensor 500 are connected with the power supply component of the external device through cables, two wire holes are arranged on the upper end surface of the protective cover 300, the two wire holes are respectively arranged in communication with the protective cavity 310, and the cable connected with the pressure sensor 400 and the cable connected with the temperature sensor 500 are respectively passed out from the two wire holes to the outside of the protective cover 300, so as to be electrically connected with the power supply component of the external device.

[0050] In some embodiments, the protective cover 300 is detachably connected with the mounting block 200, by detaching the protective cover 300, the pressure sensor 400 and the temperature sensor 500 can be exposed, so as to facilitate the maintenance of the pressure sensor 400 and the temperature sensor 500.

[0051] It can be understood that the protective cover 300 and the mounting block 200 can be connected by screws, or can be detachably connected by buckles, and the specific connection mode between the protective cover 300 and the mounting block 200 is not limited here.

[0052] In some embodiments, the pressure sensor 400 and the mounting block 200 are detachably connected, and the temperature sensor 500 and the mounting block 200 are detachably connected. After the protective cover 300 is opened, the pressure sensor 400 and the temperature sensor 500 are detached from the mounting block 200, which can more conveniently maintain or replace the pressure sensor 400 and the temperature sensor 500, and in the case of damage to one of the components, only the damaged component needs to be replaced, without discarding the entire liquid injection pump compensation device.

[0053] It can be understood that the pressure sensor 400 and the temperature sensor 500 can be connected to the mounting block 200 by screwing or buckling. In some embodiments, the lower outer periphery of the pressure sensor 400 and the temperature sensor 500 is provided with an external thread structure, and the mounting block 200 is provided with a mounting hole with an internal thread structure. The pressure sensor 400 and the temperature sensor 500 are detachably mounted on the mounting block 200 by the cooperation of the external thread structure and the internal thread structure.

[0054] It can be understood that the connection between the pressure sensor 400 and the mounting block 200 and the connection between the temperature sensor 500 and the mounting block 200 need to be sealed. In some embodiments, a first sealing ring is arranged at the connection between the pressure sensor 400 and the mounting block 200 and at the connection between the temperature sensor 500 and the mounting block 200 to improve the sealing performance of the connection and prevent the liquid in the test cavity 150 from leaking out.

[0055] In some embodiments, the mounting block 200 is detachably connected to the test chamber 100. It can be understood that the mounting block 200 and the test chamber 100 can be detachably connected by screwing, buckling or other means, which is not limited here. In this way, it is more conducive to the production and processing of the test chamber 100 and the mounting block 200, and reduces the difficulty of production and processing of the liquid injection pump compensation device.

[0056] In some embodiments, referring to Figure 5 , the test chamber 100 includes an end cover 130 and a test body 140. The end cover 130 is detachably connected to the test body 140, and the end cover 130 and the test body 140 jointly form a test cavity 150 when the end cover 130 is connected to the test body 140. In this embodiment, the liquid outlet 120 is arranged at the end cover 130, and the liquid inlet pipe 112 is connected to the end cover 130.

[0057] It can be understood that by setting the separated structure of the end cover 130 and the test body 140, the operator can conveniently open the test cavity 150 for cleaning and maintenance at regular intervals.

[0058] In this embodiment, the side of the end cover 130 facing the test cavity 150 is provided with a first sealing groove, and a second sealing ring 131 is installed in the first sealing groove. When the end cover 130 is connected to the end surface of the test body 140, the second sealing ring 131 is attached to the end surface of the test body 140 to ensure the sealing performance of the connection between the end cover 130 and the test body 140 and prevent the liquid in the test cavity 150 from leaking out through the connection between the end cover 130 and the test body 140.

[0059] It can be understood that the end cover 130 and the test main body 140 can be connected by screws, or can be detachably connected by buckling or the like, which is not specifically limited here.

[0060] In some embodiments, referring to Figure 1 、 Figure 3 and Figure 5 , the outer side wall surface of the test chamber 100 is provided with a connecting head 111, and the liquid inlet 110 penetrates the connecting head 111. In some embodiments, the liquid inlet pipe 112 is provided in the end cover 130, and the inlet end of the liquid inlet pipe 112 forms a protruding connecting head 111. It can be understood that the connecting head 111 protrudes from the outer side wall surface of the test chamber 100, which is more convenient for docking with the outlet of the pump body.

[0061] In some embodiments, the outer periphery of the connecting head 111 is provided with a second sealing groove, which can place a third sealing ring. When the connecting head 111 is connected with other pipelines, the third sealing ring can improve the sealing performance of the connection to avoid the leakage of liquid from the connection.

[0062] In some embodiments, the outer periphery of the liquid outlet 120 is provided with a third sealing groove, which can place a fourth sealing ring. When the liquid outlet 120 is connected with other pipelines, the fourth sealing ring can improve the sealing performance of the connection to avoid the leakage of liquid from the connection.

[0063] In the second aspect, the utility model discloses a kind of liquid injection pumps, with as any one of the first aspect is proposed by the liquid injection pump compensation device of embodiment. The liquid injection pump further includes pump body, and the liquid injection pump compensation device is connected to the import or export of pump body. Since being provided with liquid injection pump compensation device, when filling work is carried out, operator can learn the state of liquid injection pump and its internal liquid in time, be favorable to the monitoring of filling quantity, improve the qualified rate of filling product.

[0064] It can be understood that since the liquid injection pump compensation device is installed at the import or export of the pump body, the real-time temperature value tested by the temperature sensor 500 is close to the temperature in the volume cavity of the pump body, effectively avoiding the large heat exchange of medium, thereby avoiding the situation that the temperature tested is inconsistent with the temperature of the volume cavity determining the final liquid injection amount of liquid. Secondly, the space in the test cavity 150 is larger than the pipeline space, which can further reduce the heat exchange of liquid, thereby ensuring the testing accuracy and avoiding the compensation distortion caused by the installation space limitation of the temperature sensor 500.

[0065] Using the liquid injection pump of the embodiment, the operator can check whether the liquid injection filling process is smooth through the display screen, judge whether the liquid pipeline exists fault through the change curve of real-time pressure value, and monitor the liquid temperature within a reasonable range during the whole liquid injection filling process, to avoid the weight error of filling product exceeding the reasonable range caused by out-of-range fluctuation.

[0066] In some embodiments, the controller of the liquid injection pump compensation device is electrically connected with the pump body, and the controller fine-tunes the filling amount of the pump body according to the real-time temperature value collected by the temperature sensor 500. Specifically, the temperature sensor 500 tests the real-time temperature value of the liquid in the test cavity 150, and the controller adjusts the density parameter according to the density change amount of the liquid per unit temperature. The controller calculates the corresponding volume V according to the set liquid injection amount M divided by the density P, and when the liquid temperature changes, the controller calculates a new density parameter P1 according to the temperature-density relationship, and then calculates the final filling volume V1 by dividing M by the new density P1, so as to ensure that the quality M is always consistent. It can be understood that the fine-tuning according to the temperature change will not affect the detection of the pressure sensor 400.

[0067] The temperature sensor 500 tests the change of the liquid temperature, and the controller compensates the final liquid injection amount according to the relationship between the temperature and the density of the liquid, but the temperature rise of the liquid outlet pipeline will cause the pressure of the liquid outlet pipeline to rise, and the rising pressure will cause the first group of liquid injection amounts to be too much when starting to inject, and the pressure and the too much amount are in a linear relationship. At this time, the controller can obtain the real-time pressure value measured by the pressure sensor 400, and compensate the first group of liquid injection amounts according to the size of the pressure change, so as to further ensure that the liquid injection amount is constant during the entire liquid injection process.

[0068] For the embodiments provided with an alarm, when the pipeline fails or is affected by external factors, the pressure will change greatly, and the controller can timely alarm this failure according to the signal output by the pressure sensor 400. In some embodiments, when the real-time pressure value exceeds the preset pressure threshold value, in addition to being able to issue an alarm through the alarm, the controller can also control the pump body to stop running, so as to avoid damage to the pump body.

[0069] The preferred embodiments of the present application are described in detail above, but the present application is not limited to the described embodiments, and those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the present application. These equivalent modifications or replacements are all included in the scope defined by the claims of the present application.

Claims

1. A liquid filling pump compensation device, characterized by, The application is applied to the inlet or outlet of a liquid injection pump, and the liquid injection pump compensation device comprises: a test chamber, which is hollow to form a test cavity, and opposite side walls of the test chamber are respectively provided with a liquid inlet and a liquid outlet, and an upper end of the test chamber is provided with a mounting block; a pressure sensor, which is connected with the mounting block, and an inductive end of the pressure sensor extends into the test cavity, and the pressure sensor is used for collecting a real-time pressure value of liquid in the test cavity; a temperature sensor, which is connected with the mounting block, and an inductive end of the temperature sensor extends into the test cavity, and the temperature sensor is used for collecting a real-time temperature value of liquid in the test cavity; a controller, which is electrically connected with the pressure sensor and the temperature sensor respectively; a display screen, which is electrically connected with the controller, and the display screen is used for displaying a change curve of the real-time pressure value and a change curve of the real-time temperature value.

2. The liquid filling pump compensation device according to claim 1, characterized in that, The test cavity is provided with a liquid inlet pipe, the liquid inlet pipe comprises a horizontal flow guide section and a vertical flow guide section, the horizontal flow guide section is connected with a side wall of the test cavity, an inlet end of the horizontal flow guide section is the liquid inlet, an outlet end of the horizontal flow guide section is connected with an inlet end of the vertical flow guide section, an outlet end of the vertical flow guide section is opened upward, the inductive end of the pressure sensor is arranged toward the outlet end of the vertical flow guide section, and a flow gap is formed between the inductive end of the pressure sensor and the outlet end of the vertical flow guide section, and the flow gap is communicated with the test cavity.

3. The liquid filling pump compensation device according to claim 1, characterized in that, The liquid outlet is arranged at an upper portion of the test cavity, and the inductive end of the temperature sensor extends downward to a middle portion of the test cavity.

4. The liquid filling pump compensation device according to claim 1, characterized in that, The liquid injection pump compensation device further comprises: an alarm, which is electrically connected with the controller, and when the real-time pressure value is higher than a preset pressure threshold value, the controller controls the alarm to give an alarm.

5. The liquid filling pump compensation device according to claim 1, wherein, The liquid injection pump compensation device further comprises: a protective cover, which is arranged above the mounting block, and a protective cavity is formed in the protective cover, and the pressure sensor and the temperature sensor are arranged in the protective cavity respectively.

6. The liquid filling pump compensation device according to claim 5, wherein, The protective cover and the mounting block are detachably connected.

7. The liquid filling pump compensation device according to claim 6, characterized in that, The pressure sensor and the temperature sensor are detachably connected with the mounting block respectively.

8. The liquid filling pump compensation device according to claim 1, wherein, The test chamber comprises an end cover and a test main body, the end cover and the test main body are detachably connected and jointly form the test cavity.

9. The liquid filling pump compensation device according to claim 1, wherein, An outer side wall of the test chamber is provided with a connecting head, and the liquid inlet penetrates through the connecting head.

10. A liquid infusing pump characterized by, The liquid injection pump compensation device comprises the liquid injection pump compensation device according to any one of claims 1 to 9.

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