CN114778105A - Valve body testing device and testing method for valve body testing device - Google Patents

Valve body testing device and testing method for valve body testing device Download PDF

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Publication number
CN114778105A
CN114778105A CN202210410077.0A CN202210410077A CN114778105A CN 114778105 A CN114778105 A CN 114778105A CN 202210410077 A CN202210410077 A CN 202210410077A CN 114778105 A CN114778105 A CN 114778105A
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valve
pipeline
valve body
flow
value
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CN202210410077.0A
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Chinese (zh)
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常季
李光宇
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Truking Watertown Pharmaceutical Equipment Co Ltd
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Truking Watertown Pharmaceutical Equipment Co Ltd
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Priority to CN202210410077.0A priority Critical patent/CN114778105A/en
Publication of CN114778105A publication Critical patent/CN114778105A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00—Testing of machine parts
    • G01M13/003—Machine valves

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)

Abstract

The invention discloses a valve body test device and a test method of the valve body test device, wherein the valve body test device comprises a first pipeline, a valve to be tested, a pressure difference regulation and control assembly and a flow detection piece, the first pipeline is used for conveying fluid, and the valve to be tested is arranged on the first pipeline; the valve to be tested is arranged on the first pipeline; the pressure difference regulating and controlling assembly is arranged on the first pipeline and used for regulating and controlling the front and back pressure difference of the fluid output by the valve to be tested; the flow detection piece is arranged on the first pipeline and is positioned at the rear side of the valve to be detected so as to detect the output flow of the valve to be detected; the test method of the valve body test device can obtain the actual regulation and control capacity of the valve to be tested on the flow. When the flow is required to be regulated and controlled, the opening data of the valve to be measured can be obtained and set by directly checking the data, the flow regulation and control precision is high, and the operation is more convenient.

Description

Valve body testing device and testing method for valve body testing device
Technical Field
The invention relates to the technical field of valve bodies, in particular to a valve body testing device and a testing method for the valve body testing device.
Background
The valve body is one of important elements of a pipeline system and is widely applied to the fields of biological pharmacy, petrochemical industry, energy environmental protection and the like. The fluid flow in the pipeline can be changed by adjusting the opening of the valve body, and the method is of great importance to the smooth running, the economic benefit and the like of a pipeline system and equipment.
In the actual use process of the valve body, the actual flow rate in the pipeline is different from the expected flow rate, and sometimes a large error exists, which results in poor flow control capability of the valve body on the fluid in the pipeline. Usually, the flow rate of the rear side of the valve body is detected, and the valve opening of the valve body is adjusted by adopting a test value mode according to the detection value so as to finally obtain the required flow rate. However, this way of obtaining the actual control capacity of the valve body on the flow is not only time consuming but also inefficient.
Disclosure of Invention
In view of the above, it is necessary to provide a valve body testing apparatus and a testing method for the valve body testing apparatus; the valve body testing device can obtain the actual regulation and control capacity of the valve to be tested on the fluid flow when in use; the test method for the valve body test device can be applied to the valve body test device for testing the actual regulation and control capacity of the valve to be tested on the fluid flow.
The technical scheme is as follows:
one embodiment provides a valve body testing device for testing a valve to be tested, including:
the first pipeline is used for conveying fluid, and the valve to be tested is arranged on the first pipeline;
the pressure difference regulating and controlling component is arranged on the first pipeline and is used for regulating and controlling the front and back pressure difference of the fluid output by the valve to be measured;
the flow detection piece is arranged on the first pipeline and is positioned at the rear side of the valve to be detected so as to detect the output flow of the valve to be detected.
Above-mentioned valve body test device sets for the valve of waiting to examine the valve for certain specific opening value, then constantly changes the front and back pressure differential value of waiting to examine the valve through pressure differential regulation and control subassembly for: no matter how the pressure difference value before and after the valve to be measured changes, the flow value of the valve to be measured, which is detected by the flow detection part, is approximately equivalent to the flow value of the valve to be measured, which is obtained by theoretical calculation (namely the difference value of the two values is in a preset range), and the opening value of the valve to be measured and the currently detected actual flow value are recorded; then, different opening values of the valve to be measured are set, the process is repeated to obtain a plurality of groups of different data, further the opening values of the valve corresponding to different flow values are obtained, a database is established, when the flow is required to be regulated, the opening data of the valve to be measured can be obtained and set by directly checking the data, the flow regulation and control precision is high, and the operation is more convenient.
The technical solution is further explained as follows:
in one embodiment, the differential pressure regulating assembly includes a first pressure regulating member and a second pressure regulating member, the first pressure regulating member and the second pressure regulating member are spaced apart from each other on the first pipeline, and the first pressure regulating member and the second pressure regulating member are respectively located on two opposite sides of the valve to be measured.
In one embodiment, the first pressure regulator is a first pressure transmitter and the second pressure regulator is a second pressure transmitter.
In one embodiment, the valve body testing device further comprises a liquid storage tank, the liquid storage tank is provided with a liquid outlet end and a liquid inlet end, one end of the first pipeline is communicated with the liquid storage tank through the liquid outlet end, and the other end of the first pipeline is communicated with the liquid storage tank through the liquid inlet end.
In one embodiment, the first pipeline is further provided with a circulating pump, and the circulating pump is located between the liquid outlet end and the valve to be tested.
In one embodiment, the first pressure regulating part is positioned between the circulating pump and the valve to be tested; the first pipeline is also provided with a first valve body, and the first valve body is positioned between the circulating pump and the first pressure regulating part;
the first pipeline is further provided with a regulating valve, the regulating valve is used for regulating the front-back pressure difference of the valve to be measured, and the regulating valve is located on the rear side of the flow detection piece.
In one embodiment, the valve body testing device further comprises a second pipeline, and the second pipeline is provided with a second valve body; the one end on second pipeline with first pipeline intercommunication, the one end on second pipeline with the hookup location on first pipeline is located the circulating pump with between the first valve body, the other end on second pipeline with first pipeline intercommunication, the other end on second pipeline with the hookup location on first pipeline is located the governing valve with between the feed liquor end.
Another embodiment provides a testing method for a valve body testing apparatus, comprising the steps of:
s1, enabling the valve of the valve to be tested to be at a first set opening value;
s2, adjusting the front and back pressure difference of the valve to be detected through a pressure difference adjusting and controlling assembly, so that a first detected flow value which flows out of the valve to be detected and is detected by a flow detection piece under different pressure difference conditions is matched with a first calculated flow value of the valve to be detected, wherein the first calculated flow value is obtained through calculation;
s3, recording the first set opening value and the first detection flow value and forming first recording data;
and S4, setting different first set opening values and repeating the steps from S1 to S3 to obtain multiple groups of different first record data so as to obtain the first set opening values and the first adjustment opening values corresponding to different first detected flow values.
According to the test method for the valve body test device, the first set opening value and the first adjusting opening value corresponding to different first detection flow values are determined in a test mode, so that accurate operation basis is provided for the actual flow regulation and control capacity of the valve to be tested and the adjusting valve when the valve to be tested and the adjusting valve are used in a matched mode.
The technical solution is further explained as follows:
in one embodiment, in step S2, if the absolute value of the difference between the first detected flow value and the first calculated flow value is not greater than a first set error value, it is determined that the first detected flow value matches the first calculated flow value.
In one embodiment, after step S4, the method further includes the following steps:
and S5, fitting a relation curve chart between the first detected flow value and the first set opening value according to multiple groups of different first recorded data.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Furthermore, the drawings are not drawn to a 1:1 scale, and the relative sizes of the various elements in the drawings are drawn only by way of example, and not necessarily to true scale.
Fig. 1 is a schematic overall structure diagram of a valve body testing device in an embodiment of the invention.
Reference is made to the accompanying drawings in which:
100. a first pipeline; 110. a valve to be tested; 121. a first pressure regulating member; 122. a second pressure regulating member; 130. adjusting a valve; 140. a flow rate detecting member; 150. a circulation pump; 160. a first valve body; 170. a third valve body; 200. a second pipeline; 210. a second valve body; 300. a liquid storage tank; 310. a liquid outlet end; 320. and a liquid inlet end.
Detailed Description
Embodiments of the present invention are described in detail below with reference to the accompanying drawings:
in order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
Referring to fig. 1, an embodiment provides a valve body testing apparatus for testing a valve 110 to be tested, including a first pipeline 100, a differential pressure regulating assembly, and a flow detecting element 140. Wherein:
as shown in fig. 1, the first pipeline 100 is used for transporting fluid.
Injection water, purified water, raw water, etc. may flow in the first pipe 100.
As shown in fig. 1, the valve under test 110 is disposed on the first pipeline 100.
The flow rate of the fluid on the first pipeline 100 is adjusted by adjusting the opening degree of the valve 110 to be measured, and the actual flow rate regulation capability of the valve 110 to be measured is tested by the cooperation of the differential pressure regulation component and the flow rate detection component 140.
The pressure difference regulating and controlling component is arranged on the first pipeline 100, and is used for regulating and controlling the front and back pressure difference of the fluid output by the valve to be measured 110.
As shown in fig. 1, the flow detecting member 140 is disposed on the first pipeline 100, and the flow detecting member 140 is located at a rear side of the valve 110 to be measured to detect an output flow of the valve 110 to be measured.
This valve body test device during the use, sets for certain specific opening value with the valve of waiting to measure valve 110, then constantly changes the pressure difference value around waiting to measure valve 110 through pressure difference regulation and control subassembly for: no matter how the differential pressure value before and after the valve 110 to be measured changes, the flow value of the valve 110 to be measured detected by the flow detection element 140 is approximately equivalent to the flow value of the valve 110 to be measured obtained by theoretical calculation (i.e. the difference between the two values is within a preset range), and the opening value of the valve 110 to be measured and the currently detected actual flow value are recorded; then, different opening values are set for the valve of the valve 110 to be measured, the above processes are repeated to obtain a plurality of groups of different data, further, the opening values of the valve to be measured corresponding to the different flow values are obtained, a database is established, when the flow is required to be regulated, the opening data of the valve 110 to be measured can be obtained and set by directly checking the data, the flow regulation and control precision is high, and the operation is more convenient.
The flow value detected by the flow detection element 140 is the actual flow value flowing through the valve 110 to be measured, and when the pressure difference across the valve 110 to be measured does not have a large influence on the actual flow value flowing through the valve 110 to be measured, the opening degree of the valve 110 to be measured at this time is the expected flow (theoretical flow) that can ensure the obtained actual flow is obtained. After a plurality of groups of actual data are obtained, the data can be fitted into a curve or established into a table so as to directly provide the opening degree values of the valve 110 to be measured corresponding to different actual flow values, so that the opening degree data of the valve 110 to be measured can be obtained by directly referring to the data when the flow needs to be regulated, the operation is direct, the operation is simpler and more convenient, and the flow regulation precision is higher.
Optionally, a least square method is used to fit the actual flow value and the valve opening value of the valve 110 to be tested and obtain a relation curve.
In one embodiment, referring to fig. 1, the differential pressure regulating assembly includes a first pressure regulating element 121 and a second pressure regulating element 122, the first pressure regulating element 121 and the second pressure regulating element 122 are spaced on the first pipeline 100, and the first pressure regulating element 121 and the second pressure regulating element 122 are respectively located at two opposite sides of the valve under test 110.
As shown in fig. 1, the first modulator 121 is located at the left side of the valve under test 110 to measure and adjust the pressure of the fluid flowing into the valve under test 110, and the second modulator 122 is located at the right side of the valve under test 110 to measure and adjust the pressure of the fluid flowing out of the valve under test 110, thereby adjusting the pressure difference across the valve under test 110 by adjusting the pressures of the fluid flowing into the valve under test 110 and flowing out of the valve under test 110.
In one embodiment, the first pressure regulator 121 is a first pressure transmitter and the second pressure regulator 122 is a second pressure transmitter.
In one embodiment, referring to fig. 1, the valve body testing apparatus further includes a liquid storage tank 300, the liquid storage tank 300 has a liquid outlet end 310 and a liquid inlet end 320, one end of the first pipeline 100 is communicated with the liquid storage tank 300 through the liquid outlet end 310, and the other end of the first pipeline 100 is communicated with the liquid storage tank 300 through the liquid inlet end 320.
In the embodiment shown in fig. 1, the liquid outlet end 310 is disposed at the bottom of the liquid storage tank 300, the liquid inlet end 320 is disposed at the top of the liquid storage tank 300, one end of the first pipeline 100 is connected to the bottom of the liquid storage tank 300 through the liquid outlet end 310, and the other end of the first pipeline 100 is connected to the top of the liquid storage tank 300 through the liquid inlet end 320, so as to realize the recycling of the fluid during the test of the valve 110 to be tested, thereby forming a closed-loop test system.
In one embodiment, referring to fig. 1, the first pipeline 100 is further provided with a circulation pump 150, and the circulation pump 150 is located between the liquid outlet end 310 and the valve under test 110.
In the embodiment shown in fig. 1, the circulation pump 150 is used to pump the fluid in the tank 300 out to flow in the first pipe 100 and eventually return the fluid to the tank 300.
In one embodiment, referring to fig. 1, the first pressure regulator 121 is located between the circulation pump 150 and the valve under test 110; the first pipeline 100 is further provided with a first valve body 160, and the first valve body 160 is located between the circulation pump 150 and the first pressure regulating member 121.
In one embodiment, referring to fig. 1, the first pipeline is further provided with a regulating valve 130, the regulating valve 130 is used for regulating the pressure difference between the front and the back of the valve under test 110, and the regulating valve 130 is located at the back side of the flow detecting element 140.
As shown in fig. 1, the first pipeline 100 of the section where the valve under test 110 and the regulating valve 130 are located extends substantially left and right. If the fluid is transported from left to right in the first pipeline 100, the right side is the rear side of the first pipeline 100, and the left side is the front side of the first pipeline 100. Therefore, the regulating valve 130 is located at the rear side of the flow rate detecting member 140.
In one embodiment, referring to fig. 1, the valve body testing apparatus further includes a second pipeline 200, and the second pipeline 200 is provided with a second valve body 210; the one end of second pipeline 200 with first pipeline 100 communicates, the one end of second pipeline 200 with the hookup location of first pipeline 100 is located circulating pump 150 with between the first valve body 160, the other end of second pipeline 200 with first pipeline 100 communicates, the other end of second pipeline 200 with the hookup location of first pipeline 100 is located governing valve 130 with between the feed liquor end 320.
In the embodiment shown in fig. 1, the second valve body 210 is provided on the second pipe 200, and the first valve body 160 is provided on the first pipe 100 between the circulation pump 150 and the first pressure regulating member 121. When the first valve body 160 is closed, in order to avoid damage to the circulation pump 150 caused by transient fluid pressure increase, the second valve body 210 is synchronously opened at this time, so that the fluid flowing out of the circulation pump 150 can be dredged through the second pipeline 200 to flow back into the liquid storage tank 300 again, thereby protecting the circulation pump 150 and prolonging the service life of the circulation pump 150. The second line 200 corresponds to a protection line.
It can be understood that:
when the flow regulation capability test of the valve under test 110 on the fluid is performed, the second valve body 210 on the second pipeline 200 is closed, so that the fluid circulates through the first pipeline 100; when at least one of the valve to be measured 110, the differential pressure regulating component and the flow rate detecting component 140 needs to be regulated, the second valve body 210 is opened to avoid damage to the circulation pump 150.
In one embodiment, referring to fig. 1, the first pipeline 100 is further provided with a third valve 170, and the third valve 170 is located between the liquid outlet end 310 and the circulation pump 150.
Optionally, the first valve body 160, the second valve body 210, and the third valve body 170 are all ball valves.
In one embodiment, the valve body testing apparatus further includes a control cabinet electrically connected to at least one of the valve under test 110, the differential pressure regulating assembly, the regulating valve 130 and the flow detecting member 140.
The control cabinet may be provided with a manipulation panel or a display panel to display at least one of the opening data of the valve 110 to be measured, the differential pressure data regulated by the differential pressure regulation data, the opening data of the regulating valve 130, and the detection data of the flow rate detecting member 140.
In one embodiment, the valve under test 110 is an electrically controlled valve; the regulating valve 130 is a manual valve; the flow sensing member 140 is a flow transmitter.
Optionally, the valve under test 110 is a PID control valve.
Another embodiment provides a testing method for a valve body testing apparatus, comprising the steps of:
s1, enabling the valve of the valve to be tested 110 to be at a first set opening value;
s2, continuously adjusting the pressure difference across the valve 110 to be measured by the pressure difference adjustment and control component, so that the first detected flow value flowing out of the valve 110 to be measured, detected by the flow detection element 140 under different pressure difference conditions, matches the first calculated flow value of the valve 110 to be measured, obtained by calculation;
s3, recording the first set opening value and the first detection flow value and forming first recording data;
and S4, setting different first set opening values and repeating the steps from S1 to S3 to obtain multiple groups of different first record data so as to obtain the first set opening values and the first adjustment opening values corresponding to the different first detection flow values.
According to the test method for the valve body test device, the first set opening values corresponding to different first detection flow values are determined in a test mode, so that the actual regulation and control capacity of the valve 110 to be tested on the flow can be accurately operated.
When the first calculated flow value of the valve 110 to be measured is calculated, the flow coefficient Kv of the valve 110 to be measured needs to be used, the flow coefficient can be directly obtained through a factory parameter table of the valve 110 to be measured, and can also be obtained through a test, and parameters obtained through the test are more accurate. The mode obtained by the test is presented here:
first, the valve of the valve under test 110 is set at a second set opening value (e.g., 10% opening value);
then, the differential pressure regulating component and the regulating valve 130 regulate the front and back differential pressure of the valve to be measured 110 to 1 bar;
then, a second detected flow value currently flowing out of the valve to be detected 110 is obtained through the flow detection element 140;
then, the flow coefficient Kv when the valve of the valve 110 to be measured is at the second set opening value can be obtained according to the following valve body flow calculation formula;
Figure BDA0003603813430000101
then, different second set opening values are set and the steps are repeated to obtain the flow coefficients Kv corresponding to the different second set opening values respectively.
Of course, after obtaining a plurality of sets of different second set opening values and corresponding flow coefficients Kv, a curve graph of the second set opening values and the flow coefficients may be obtained by fitting the data to a form of a curve, or a table may be made to reflect the flow coefficients corresponding to the different second set opening values.
It should be noted that:
the above valve body flow calculation formula, qvRefers to the flow through the valve 110 under test, Δ p refers to the differential pressure across the valve 110 under test, and ρ refers to the density of the fluid. Since the density of the fluid is a definite value, for example, if the fluid is water, the density is 1 × 103kg/m3And because the pressure difference is set to be 1bar, the flow coefficient Kv can be obtained by knowing the flow value, and the description is omitted.
Alternatively, the first set opening value may be 100%, 90%, 80%, 70%, 60%, 50%, 40%, 30%, 20%, 10%, 5% in order.
The actual outflow rates of the valve 110 to be measured under different opening degrees are obtained.
In one embodiment, in step S2, if the absolute value of the difference between the first detected flow rate value and the first calculated flow rate value is not greater than a first set error value, it is determined that the first detected flow rate value matches the first calculated flow rate value.
For example, the first set error value may be 5%.
If the first detected flow value is not matched with the first calculated flow value, the regulating valve 130 is adjusted to regulate the front-back pressure difference of the valve 110 to be measured, so that the first detected flow value and the first calculated flow value can be matched when the front-back pressure difference of the valve 110 to be measured under the current valve opening is found, and the regulated flow is more stable when the valve opening of the valve 110 to be measured is found to be different from the first calculated flow value until the first detected flow value is matched with the first calculated flow value.
In one embodiment, after step S4, the method further includes the following steps:
and S5, fitting a relation curve chart between the first detected flow value and the first set opening value according to multiple groups of different first recorded data.
Through the graph, in the subsequent use process, the opening value of the valve to be tested 110 corresponding to the required control flow can be quickly obtained by using the graph, so that the control precision of the flow is improved.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is specific and detailed, but not to be understood as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. The utility model provides a valve body test device which for treat the valve of measurationing experiment, include:
the first pipeline is used for conveying fluid, and the valve to be tested is arranged on the first pipeline;
the pressure difference regulating and controlling component is arranged on the first pipeline and is used for regulating and controlling the front and back pressure difference of the fluid output by the valve to be measured;
the flow detection piece is arranged on the first pipeline and is positioned at the rear side of the valve to be detected so as to detect the output flow of the valve to be detected.
2. The valve body testing device of claim 1, wherein the differential pressure regulating assembly comprises a first pressure regulating member and a second pressure regulating member, the first pressure regulating member and the second pressure regulating member are spaced apart from each other on the first pipeline, and the first pressure regulating member and the second pressure regulating member are respectively located on two opposite sides of the valve to be tested.
3. The valve body testing apparatus of claim 2, wherein said first pressure regulator is a first pressure transmitter and said second pressure regulator is a second pressure transmitter.
4. The valve body test device according to claim 2, further comprising a liquid storage tank, wherein the liquid storage tank is provided with a liquid outlet end and a liquid inlet end, one end of the first pipeline is communicated with the liquid storage tank through the liquid outlet end, and the other end of the first pipeline is communicated with the liquid storage tank through the liquid inlet end.
5. The valve body test device of claim 4, wherein the first pipeline is further provided with a circulating pump, and the circulating pump is positioned between the liquid outlet end and the valve to be tested.
6. The valve body testing device of claim 5, wherein the first pressure regulating member is positioned between the circulating pump and the valve to be tested; the first pipeline is also provided with a first valve body, and the first valve body is positioned between the circulating pump and the first pressure regulating part;
the first pipeline is further provided with a regulating valve, the regulating valve is used for regulating the front-back pressure difference of the valve to be detected, and the regulating valve is located on the rear side of the flow detection piece.
7. The valve body test device of claim 6, further comprising a second pipeline, the second pipeline having a second valve body; the one end on second pipeline with first pipeline intercommunication, the one end on second pipeline with the hookup location on first pipeline is located the circulating pump with between the first valve body, the other end on second pipeline with first pipeline intercommunication, the other end on second pipeline with the hookup location on first pipeline is located the governing valve with between the feed liquor end.
8. A test method for a valve body test device is characterized by comprising the following steps:
s1, enabling the valve of the valve to be tested to be at a first set opening value;
s2, adjusting the front and back pressure difference of the valve to be detected through a pressure difference adjusting and controlling assembly, so that a first detected flow value which flows out of the valve to be detected and is detected by a flow detection piece under different pressure difference conditions is matched with a first calculated flow value of the valve to be detected, wherein the first calculated flow value is obtained through calculation;
s3, recording the first set opening value and the first detection flow value and forming first recording data;
and S4, setting different first set opening values and repeating the steps from S1 to S3 to obtain multiple groups of different first record data so as to obtain the first set opening values and the first adjustment opening values corresponding to different first detected flow values.
9. The testing method for a valve body testing apparatus according to claim 8, characterized in that in step S2, if the absolute value of the difference between the first detected flow rate value and the first calculated flow rate value is not greater than a first set error value, it is determined that the first detected flow rate value matches the first calculated flow rate value.
10. The testing method for the valve body testing device according to claim 8, further comprising the following steps after step S4:
and S5, fitting a relation curve graph between the first detection flow rate value and the first set opening degree value according to a plurality of groups of different first recorded data.
CN202210410077.0A 2022-04-19 2022-04-19 Valve body testing device and testing method for valve body testing device Pending CN114778105A (en)

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CN202210410077.0A CN114778105A (en) 2022-04-19 2022-04-19 Valve body testing device and testing method for valve body testing device

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