Detection structure and detection method for cumulative flow of reciprocating pump

Abstract

The application discloses a kind of detection structure of reciprocating pump cumulative flow, including the lower sleeve in reciprocating pump and with the transmission connection of worm gear in reciprocating pump, the inner hole lower end of lower sleeve is equipped with bearing, the lower side of lower sleeve is spaced and is equipped with bearing cover, the side of bearing cover towards lower sleeve is raised and forms boss in the inner hole of bearing along the center line direction of lower sleeve, boss is installed in the inner hole of bearing and is rotatably connected with lower sleeve by bearing, one or more induction blocks are fixedly connected on the lower end surface of lower sleeve, when the number of induction block is multiple, multiple induction blocks are evenly spaced and arranged around the center line direction of lower sleeve, inductive sensor is installed in the position of bearing cover corresponding lower end surface of lower sleeve, inductive sensor can inductively detect induction block, counter module is provided outside bearing cover, inductive sensor is electrically connected with counter module.The application also discloses a kind of method for detecting the cumulative flow of reciprocating pump using the above structure.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pump, in particular to a detection structure and detection method for cumulative flow of reciprocating pump. BACKGROUND

[0002] The reciprocating pump includes piston pump, metering pump and diaphragm pump, commonly known as reciprocating pump. It is a kind of positive displacement pump, and is widely used. The reciprocating pump is a conveying machine that directly provides energy to the liquid in the form of pressure energy through the reciprocating motion of the piston. The total output of the fluid medium of the reciprocating pump is usually realized by controlling the number of pumping cycles or the duration of operation, but in the actual test of the reciprocating pump, it is difficult to accurately measure the flow of the pump, and thus it is difficult to accurately measure and control the total output of the reciprocating pump. SUMMARY

[0003] In view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by the present application is to provide a detection structure for measuring the cumulative flow of the reciprocating pump accurately and reliably.

[0004] In order to solve the above technical problems, the technical scheme adopted by the present application is as follows:

[0005] A detection structure for cumulative flow of reciprocating pump, comprising a lower sleeve located in the reciprocating pump and connected with the worm gear transmission in the reciprocating pump, a bearing coaxial with the lower sleeve is installed at the lower end of the inner hole of the lower sleeve, a bearing cover is arranged below the lower sleeve, the side of the bearing cover facing the lower sleeve is protruded along the center line direction of the lower sleeve to form a boss inserted into the inner hole of the bearing, the boss is installed in the inner hole of the bearing and connected with the lower sleeve through the bearing, one or more induction blocks are fixedly connected to the lower end surface of the lower sleeve, when the number of induction blocks is more than one, the plurality of induction blocks are uniformly and spacedly arranged around the center line direction of the lower sleeve, an inductive sensor is installed on the bearing cover corresponding to the position of the lower end surface of the lower sleeve, the inductive sensor can inductively detect the induction block, a counter module is arranged outside the bearing cover, and the inductive sensor is electrically connected with the counter module.

[0006] During the operation of the reciprocating pump, the lower sleeve is driven to rotate, and during the rotation of the lower sleeve, the inductive sensor can inductively detect the induction block every time the induction block passes through the inductive sensor, at this time the inductive sensor will generate a pulse signal accordingly, and the number of pulse signals is counted by the counter module, and then the cumulative flow is calculated.

[0007] As an optimization, the inductive sensor passes through the bearing cover along the direction parallel to the center line of the lower sleeve, and lock nuts are threadedly connected to the positions of the inductive sensor on the inner and outer sides of the bearing cover, respectively, and the two lock nuts are abutted on the bearing cover, respectively.

[0008] As the optimization, the inductive block is an inductive screw, a connecting screw hole is concavely arranged on the lower end face of the lower sleeve at a position corresponding to the inductive screw in a direction parallel to the center line of the lower sleeve, and the rod part of the inductive screw is threadedly connected in the connecting screw hole.

[0009] The application further discloses a detection method of cumulative flow of the reciprocating pump.

[0010] (1) determining a current stroke S of the reciprocating pump, and then obtaining an instantaneous flow value Q corresponding to the current stroke S according to a stroke-flow curve S After the pump is installed and debugged, a unit flow under the current stroke is obtained through on-site testing:

[0011]

[0012] Wherein Q 转 is the unit flow (L / h), Q S is the instantaneous flow (L / h) corresponding to the current stroke S, and n is a rated pump speed (r / min).

[0013] (2) obtaining the cumulative flow by measuring the pulse number of the lower sleeve during operation through the counter module and using the following formula:

[0014]

[0015] Wherein Q 累 is the cumulative flow (L), Q 惰 is the flow (L) output by the pump during the pump inertia period after the pump is connected to the stop signal, n' is the pulse number of the inductive sensor obtained by the counter module, and Z is the number of the inductive blocks. After the motor is powered off, the motor does not stop rotating immediately due to inertia, so the cumulative flow formula needs to be corrected by Q 惰 .

[0016] Compared with the prior art, the application obtains the running condition of the worm gear in the pump through the induction of the inductive blocks on the lower sleeve, and then obtains the cumulative flow of the pump through calculation, and the structure is simple and accurate and reliable in use. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic view of the application. DETAILED DESCRIPTION

[0018] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0019] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In the description of the present application, it should be explained that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation and cannot be understood as indicating or implying relative importance. In addition, the terms "horizontal", "vertical" and the like do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined. In the description of the present application, it should also be explained that unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "linkage" should be understood broadly, for example, can be fixed connection, can be detachable connection, or integral connection; can be mechanical connection, can be electrical connection; can be direct connection, can be indirect connection through an intermediate medium, or can be the communication inside two elements. For a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0020] As Figure 1As shown, the detection structure of the cumulative flow of the reciprocating pump in the embodiment comprises a lower sleeve 1 located in the reciprocating pump and connected with the worm gear in the reciprocating pump, a bearing 2 with the same center line as the lower sleeve 1 is installed at the lower end of the inner hole of the lower sleeve 1, a bearing cover 3 is arranged below the lower sleeve 1, a boss is protruded from the side of the bearing cover 3 towards the lower sleeve 1 along the center line direction of the lower sleeve 1 and is inserted into the inner hole of the bearing 2, the boss is installed in the inner hole of the bearing 2 and is connected with the lower sleeve 1 in rotation through the bearing 2, one or more induction blocks 4 are fixedly connected to the lower end surface of the lower sleeve 1, when the number of the induction blocks 4 is more than one, the plurality of induction blocks 4 are uniformly and interval arranged around the center line direction of the lower sleeve 1, an inductive sensor 5 is installed on the bearing cover 3 corresponding to the position of the lower end surface of the lower sleeve 1, the inductive sensor 5 can inductively detect the induction blocks 4, a counter module is arranged outside the bearing cover 3, and the inductive sensor 5 is electrically connected with the counter module.

[0021] The inductive sensor 5 in the embodiment passes through the bearing cover 3 along the center line direction of the lower sleeve 1, lock nuts are threadedly connected to the positions of the inductive sensor 5 on the inner and outer sides of the bearing cover 3 respectively, and the two lock nuts are respectively abutted against the bearing cover 3.

[0022] The induction block 4 in the embodiment is an induction screw, and a connecting screw hole is recessed on the lower end surface of the lower sleeve 1 corresponding to the position of the induction screw along the center line direction of the lower sleeve 1, and the rod part of the induction screw is threadedly connected in the connecting screw hole.

[0023] A detection method of the cumulative flow of a reciprocating pump, which utilizes the detection structure of the cumulative flow of the reciprocating pump to detect the cumulative flow, comprises the following steps:

[0024] (1) determining the current stroke S of the reciprocating pump, and then obtaining the instantaneous flow value Q corresponding to the current stroke S according to the stroke-flow curve S , calculating the unit flow under the current stroke:

[0025]

[0026] Wherein Q 转 is the unit flow (L / h), Q S is the instantaneous flow (L / h) corresponding to the current stroke S, and n is the rated pump speed (r / min);

[0027] (2) measuring the pulse number of the lower sleeve during operation through the counter module, and calculating the cumulative flow by using the following formula:

[0028]

[0029] Wherein Q 累L is the cumulative flow (L), Q 惰 L is the flow (L) outputted by the pump in the pump idling period after the pump is connected to the stop signal, n' is the number of pulses sent by the inductive sensor obtained by the counter module, and Z is the number of inductive blocks.

[0030] The reciprocating pump is installed on the pipeline. When 30 L of clean water needs to be transported to the next process through the reciprocating pump, the water is turned off after the flow quota is reached. Through the monitoring instrument, it can be seen that the stroke-flow curve of the current reciprocating pump corresponds to the instantaneous flow value Q S 120 L / h, and the rated speed of the reciprocating pump is 200 r / min, and four inductive blocks are installed thereon. According to the test, the flow Q outputted by the pump in the pump idling period under the stroke is 1 L. 惰

[0031]

[0032]

[0033] Therefore, when it is detected that the number of pulses measured by the counter module when the lower sleeve is running reaches 11,600 times, the cumulative output flow of the reciprocating pump also reaches 30 L, and therefore the reciprocating pump can be turned off. Similarly, after that, only the number of detected pulses is needed to obtain the corresponding cumulative flow of the reciprocating pump.

[0034] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described by referring to the preferred embodiments of the present application, those skilled in the art should understand that various changes can be made in form and details without departing from the spirit and scope of the present application defined in the appended claims.​

Claims

1. A detection structure of cumulative flow of a reciprocating pump, comprising a lower sleeve located in the reciprocating pump and connected with a worm gear transmission in the reciprocating pump, a bearing coaxial with the lower sleeve is installed at the lower end of the inner hole of the lower sleeve, a bearing cover is arranged below the lower sleeve, a boss is formed on the side of the bearing cover facing the lower sleeve and protruding along the center line direction of the lower sleeve, the boss is installed in the inner hole of the bearing and connected with the lower sleeve in rotation through the bearing, characterized in that: One or more induction blocks are fixedly connected to the lower end face of the lower sleeve, when the number of induction blocks is multiple, the multiple induction blocks are uniformly spaced around the center line direction of the lower sleeve, an inductive sensor is installed on the bearing cover corresponding to the position of the lower end face of the lower sleeve, the inductive sensor can inductively detect the induction block, a counter module is arranged outside the bearing cover, and the inductive sensor is electrically connected with the counter module.

2. The detection structure of cumulative flow of a reciprocating pump according to claim 1, characterized in that: The inductive sensor passes through the bearing cover along the center line direction of the lower sleeve, and lock nuts are threadedly connected to positions on the inductive sensor and located on both sides of the bearing cover.

3. The detection structure of cumulative flow of a reciprocating pump according to claim 1, characterized in that: The induction block is an induction screw, and a connecting screw hole is concavely arranged on the lower end face of the lower sleeve corresponding to the position of the induction screw along the center line direction of the lower sleeve.

4. A method for detecting the cumulative flow of a reciprocating pump, characterized by: The detection structure for cumulative flow of the reciprocating pump according to any one of claims 1 to 3 is used to detect the cumulative flow, and the detection includes the following steps: (1) Determine the current stroke S of the reciprocating pump, and then obtain the instantaneous flow value Q corresponding to the current stroke S according to the stroke-flow curve S , Calculate the unit flow under the current stroke: where Q 转 is the unit flow rate, Q S is the instantaneous flow rate corresponding to the current stroke S, and n is the rated pump speed. (2) The pulse number of the lower sleeve during operation is measured by the counter module, and the cumulative flow is calculated by using the following formula: where Q 累 is the cumulative flow, Q 惰 is the flow outputted by the pump during the pump freewheeling period after the pump is connected to the stop signal, n' is the number of pulses received by the counter module from the inductive sensor, and Z is the number of sensing blocks.

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