CN115977935A - Detection structure and detection method for accumulated flow of reciprocating pump - Google Patents

Abstract

The invention discloses a detection structure for accumulated flow of a reciprocating pump, which comprises a lower sleeve positioned in the reciprocating pump and in transmission connection with a worm gear in the reciprocating pump, wherein a bearing is installed at the lower end of an inner hole of the lower sleeve, bearing covers are arranged below the lower sleeve at intervals, a boss inserted into the inner hole of the bearing is formed on one side of each bearing cover facing the lower sleeve in a protruding mode along the central line direction of the lower sleeve, the boss is installed in the inner hole of the bearing and is in rotary connection with the lower sleeve through the bearing, one or more induction blocks are fixedly connected to the lower end face of the lower sleeve, when the number of the induction blocks is multiple, the induction blocks are uniformly arranged at intervals around the central line direction of the lower sleeve, an inductive sensor is installed at the position, corresponding to the lower end face of the lower sleeve, of each bearing cover can perform induction detection on the induction blocks, a counter module is arranged outside each bearing cover, and the inductive sensor is electrically connected with the counter module. The invention also discloses a method for detecting the accumulated flow of the reciprocating pump by using the structure.

Description

Detection structure and detection method for accumulated flow of reciprocating pump

Technical Field

The invention relates to the technical field of pumps, in particular to a structure and a method for detecting accumulated flow of a reciprocating pump.

Background

Reciprocating pumps include piston pumps, metering pumps and diaphragm pumps, commonly known as reciprocating pumps. It is one of positive displacement pumps and has wide application. Reciprocating pumps are delivery machines that provide energy directly to a liquid in the form of pressure energy through the reciprocating motion of a piston. The total output of the fluid medium of the reciprocating pump is usually realized by controlling the pumping cycle number or the operation duration, but in the process of actually testing the reciprocating pump, the flow rate of the pump is difficult to accurately measure, and the total output of the reciprocating pump is difficult to accurately measure and control.

Disclosure of Invention

Aiming at the defects of the prior art, the technical problems to be solved by the invention are as follows: how to provide a detection structure for measuring the accumulated flow of the reciprocating pump accurately and reliably.

In order to solve the technical problems, the invention adopts the technical scheme that:

the utility model provides a detection structure of reciprocating pump accumulative total flow, including the lower sleeve that is located the reciprocating pump and is connected with the interior worm gear transmission of reciprocating pump, the bearing with lower sleeve with the same central line is installed to lower telescopic hole lower extreme department, lower telescopic below interval is provided with the bearing cap, the protruding boss that inserts in the bearing hole that is formed along lower sleeve central line direction in one side of bearing cap orientation lower sleeve, the boss is installed in the bearing hole and is connected with lower sleeve rotation through the bearing, fixedly connected with one or more response piece on the lower extreme terminal surface of lower sleeve, when the quantity of response piece is a plurality of, a plurality of response pieces set up around lower sleeve central line direction even interval, the position that the bearing cap corresponds lower sleeve lower terminal surface installs inductance type sensor, inductance type sensor can respond to the response piece and detect, the bearing cap is provided with the counter module outward, inductance type sensor is connected with the counter module electricity.

The reciprocating pump can drive down the sleeve and rotate at the in-process of operation, and at the rotatory in-process of sleeve down, whenever when the response piece through inductive sensor, inductive sensor just can sense the response piece, and inductive sensor is corresponding will produce pulse signal this moment, and rethread counter module counts pulse signal's number of times, and then calculates the accumulative flow.

Preferably, the inductive sensor penetrates through the bearing cover along a direction parallel to the central line of the lower sleeve, locking nuts are respectively in threaded connection with positions, located on the inner side and the outer side of the bearing cover, on the inductive sensor, and the two locking nuts are respectively abutted against the bearing cover.

Preferably, the induction block is an induction screw, a connection screw hole is concavely formed in the end face of the lower end of the lower sleeve, which corresponds to the induction screw, in the direction parallel to the central line of the lower sleeve, and the rod part of the induction screw is in threaded connection with the connection screw hole.

The invention also discloses a method for detecting the accumulated flow of the reciprocating pump, which utilizes the structure for detecting the accumulated flow of the reciprocating pump to detect the accumulated flow and comprises the following steps:

(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 And after the pump is installed and debugged, the unit flow under the current stroke is calculated by field test:

wherein Q _{Rotating shaft} Is unit flow rate (L/h), Q _S The instantaneous flow (L/h) corresponding to the current stroke S, and n is the rated pump speed (r/min);

(2) The pulse frequency of the lower sleeve in operation is measured by a counter module, and the accumulated flow is calculated by adopting the following formula:

wherein Q _{Tired of} To accumulate the flow (L), Q _{Inertia device} After the pump receives a pump stopping signal, the pump outputs flow (L) in the idle period, n' is the pulse frequency sent by the inductive sensor obtained by the counter module, and Z is the number of the inductive blocks. The motor is not in use after power failure due to inertiaWill stop rotating immediately, so the formula of cumulative flow needs to add Q _{Inertia device} And (6) correcting.

Compared with the prior art, the invention obtains the running condition of the worm wheel in the pump by inducing the induction block on the lower sleeve, thereby obtaining the accumulated flow of the pump by calculation, and the invention has simple structure and accurate and reliable use.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined. In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1, the structure for detecting the accumulated flow of the reciprocating pump in the present embodiment includes a lower sleeve 1 located in the reciprocating pump and in transmission connection with a worm gear in the reciprocating pump, a bearing 2 having the same center line as the lower sleeve 1 is installed at the lower end of an inner hole of the lower sleeve 1, bearing covers 3 are disposed below the lower sleeve 1 at intervals, a boss inserted into the inner hole of the bearing 2 is formed by protruding the bearing cover 3 toward one side of the lower sleeve 1 along the center line direction of the lower sleeve 1, the boss is installed in the inner hole of the bearing 2 and is rotatably connected with the lower sleeve 1 through the bearing 2, one or more sensing blocks 4 are fixedly connected to the lower end surface of the lower sleeve 1, when the number of the sensing blocks 4 is multiple, the multiple sensing blocks 4 are uniformly spaced around the center line direction of the lower sleeve 1, an inductive sensor 5 is installed at a position of the bearing cover 3 corresponding to the lower end surface of the lower sleeve 1, the inductive sensor 5 can perform inductive detection on the sensing blocks 4, a counter module is disposed outside the bearing cover 3, and the inductive sensor 5 is electrically connected to the counter module.

In this embodiment, the inductive sensor 5 passes through the bearing cap 3 along a direction parallel to the central line of the lower sleeve 1, locking nuts are respectively screwed on the inductive sensor 5 and at positions on the inner side and the outer side of the bearing cap 3, and the two locking nuts are respectively abutted against the bearing cap 3.

In this embodiment, the sensing block 4 is a sensing screw, a connection screw hole is concavely formed in the lower end surface of the lower sleeve 1 along a direction parallel to the central line of the lower sleeve 1 at a position corresponding to the sensing screw, and a rod part of the sensing screw is in threaded connection with the connection screw hole.

A method for detecting the accumulated flow of a reciprocating pump by using the structure for detecting the accumulated flow of the reciprocating pump comprises the following steps:

(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 And calculating the unit flow under the current travel:

wherein Q _{Rotating shaft} Is unit flow rate (L/h), Q _S The instantaneous flow (L/h) corresponding to the current stroke S, and n is the rated pump speed (r/min);

(2) The pulse frequency of the lower sleeve in operation is measured by a counter module, and the accumulated flow is calculated by adopting the following formula:

wherein Q _{Tired of} To accumulate the flow (L), Q _{Inertia device} After the pump receives a pump stopping signal, the pump outputs flow (L) in the idle period, n' is the pulse frequency sent by the inductive sensor obtained by the counter module, and Z is the number of the inductive blocks.

The reciprocating pump is arranged on the pipeline, when 30L of clean water is required to be conveyed to the next flow path through the reciprocating pump, the water conveying is closed after the flow rate quota is reached, and the corresponding instantaneous flow value Q of the stroke-flow curve of the current reciprocating pump when the stroke S is 100 percent can be seen through the monitoring instrument _S 120L/h, and rated pump of reciprocating pumpThe speed is 200r/min, 4 induction blocks are arranged on the induction block, and the flow Q output by the pump in the idle period under the stroke is obtained according to test _{Inertia device} Is 1L, and can be known through correlation calculation:

therefore, when the pulse frequency of the lower sleeve in operation measured by the counter module reaches 11600 times, the accumulated output flow of the reciprocating pump reaches 30L, and therefore the reciprocating pump can be closed.

Finally, it is noted that the above-mentioned embodiments illustrate rather than limit the invention, and that, while the invention has been described with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (4)

1. The utility model provides a detection structure of reciprocating pump accumulative total flow, including being located the reciprocating pump and the lower sleeve of being connected with the interior worm gear transmission of reciprocating pump, the bearing with the same central line of lower sleeve is installed to lower telescopic hole lower extreme department, lower telescopic below interval is provided with the bearing cap, the bearing cap is formed with the boss that inserts in the bearing hole along lower sleeve central line direction arch towards lower telescopic one side, the boss is installed in the bearing hole and is connected its characterized in that through bearing and lower sleeve rotation: fixedly connected with one or more response pieces on the lower extreme terminal surface of lower sleeve, when the quantity of response piece is a plurality of, a plurality of response pieces set up around the even interval of sleeve central line direction down, and the inductive sensor is installed to the position that the bearing cap corresponds terminal surface under the sleeve, and inductive sensor can respond to the detection to the response piece, is provided with the counter module outside the bearing cap, and inductive sensor is connected with the counter module electricity.

2. The structure for detecting cumulative flow of a reciprocating pump according to claim 1, wherein: the inductive sensor penetrates through the bearing cover along the direction parallel to the central line of the lower sleeve, locking nuts are respectively in threaded connection with the positions, located on the inner side and the outer side of the bearing cover, of the inductive sensor, and the two locking nuts are respectively abutted against the bearing cover.

3. The structure for detecting cumulative flow of a reciprocating pump according to claim 1, wherein: the induction block is an induction screw, a connection screw hole is concavely arranged on the lower end face of the lower sleeve at a position corresponding to the induction screw in a direction parallel to the central line of the lower sleeve, and the rod part of the induction screw is in threaded connection with the connection screw hole.

4. A method for detecting the accumulated flow of a reciprocating pump is characterized by comprising the following steps: the detection of the accumulated flow rate by using the structure for detecting the accumulated flow rate of the reciprocating pump according to any one of claims 1 to 3, comprising the steps of:

(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 And calculating the unit flow under the current travel:

wherein Q _{Rotating shaft} Is unit flow rate, Q _S The instantaneous flow corresponding to the current stroke S, and n is the rated pump speed;

(2) The pulse frequency of the lower sleeve in operation is measured by a counter module, and the accumulated flow is calculated by adopting the following formula:

wherein Q _{Tired of} To accumulate the flow, Q _{Inertia device} After the pump receives a pump stopping signal, the pump outputs flow in the idle period, n' is the pulse frequency sent by the inductive sensor obtained by the counter module, and Z is the number of the inductive blocks.

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