CN106289610B - A kind of constant volume quantitatively expands force checking device - Google Patents

Abstract

The invention discloses a constant volume and quantitative expansion force detection device and detection method, which are characterized in that: on a horizontally arranged detection platform, one end is a material container, the other end is a motor, and the container piston rod of the material container is positioned at the center of the material container. The front end protrudes toward the end of the motor and is arranged along the longitudinal direction of the detection platform; a screw nut transmission structure is set between the motor and the piston rod, wherein the screw rod is driven by the motor to rotate, and the nut is fixedly connected to one end of the cylinder. A pressure sensor is arranged in series between the other end of the cylinder and the piston rod of the container, and the pressure sensor detects the pulling pressure on the piston rod of the container, and the position sensor detects the longitudinal position of the piston rod of the container. The invention is used for the constant-volume quantitative expansion force detection of materials, and can be suitable for the detection of variable volume expansion force.

Description

A constant volume and quantitative expansion force detection device

technical field

The invention relates to a device and a detection method for constant volume and quantitative expansion force detection of materials.

Background technique

The material expansion force refers to the pressure that the material expands on the container after the material undergoes a chemical reaction after being mixed in a closed container. In the expansion force detection device in the prior art, the sensor is placed in the container, and the sensor is in direct contact with the material to be tested. The main problems in this form are that the sensor is easily damaged, and the second is that the built-in sensor brings device maintenance and Very difficult to maintain. Not only that, because the volume of the structure in the prior art is fixed, if you want to measure materials with different volumes, you must configure containers with corresponding volumes. One detection device cannot be suitable for the detection of expansion force of materials with variable volumes. limitations.

Contents of the invention

The present invention aims at avoiding the shortcomings of the above-mentioned prior art, and provides a constant volume and quantitative expansion force detection device and detection method, which are suitable for the detection of variable volume expansion force.

The present invention adopts following technical scheme for solving technical problems:

The structural feature of the constant volume and quantitative expansion force detection device of the present invention is: on the detection platform arranged horizontally, one end is arranged as a material container, and the other end is arranged as a motor, and the container piston rod of the material container protrudes from the front end of the material container , toward the end where the motor is located and arranged along the longitudinal direction of the detection platform; a screw nut transmission structure composed of a screw and a nut is set between the motor and the piston rod, and the screw is driven by the motor through a reducer to rotate. The nut is fixedly connected to one end of the cylinder, and a pressure sensor is arranged in series between the other end of the cylinder and the piston rod of the container, and the cylinder is used to drive the longitudinal movement of the piston rod of the container, and the pressure sensor is used to detect the pressure of the container piston. The pulling pressure on the rod; a position sensor is installed on one side of the cylinder on the detection platform, and the position sensor is used to detect the longitudinal position of the piston rod of the container; a material inlet is provided at the tail of the material container.

The structural feature of the constant volume and quantitative expansion force detection device of the present invention is also that: a longitudinal guide rail is arranged on the detection platform, and a slider is provided to slide and cooperate with the longitudinal guide wheel; The sides are fixed and clamped in the form of embracing, and the bracket is fixedly connected with the slider, so that the longitudinal movement of the cylinder is guided on the longitudinal guide rail.

The structural feature of the constant volume and quantitative expansion force detection device of the present invention is also that: the position sensor is a grating ruler, and the grating ruler is fixedly arranged on one side of the support to link with the cylinder and the support.

The characteristics of the detection method of the constant volume quantitative expansion force detection device of the present invention are:

definition:

S is the cross-sectional area of the inner cavity of the material container;

V1 is the volume of the material before chemical reaction expansion;

V2 is the volume of the material after chemical reaction expansion;

L1 is the protruding length of the piston rod of the container when the material is in the V1 volume state before the chemical reaction expands, L1=V1/S;

L2 is the protruding length of the piston rod of the container when the material is in the V2 volume state after chemical reaction expansion, L2=V2/S:

Described detection method is to carry out as follows:

Step 1: Calculate the extension length L1 of the piston rod of the container according to the volume V1 of the known material chemical reaction before expansion; the piston rod of the container is driven by the motor to extend at the position of length L1, and the material is sucked from the material inlet to the material In the container, complete the filling of the material container;

Step 2: Calculate the extension length L2 of the piston rod of the container according to the volume V2 after the expansion of the known material chemical reaction; the piston rod of the container is driven by the motor to move within the set time from the position of the extension length L1 At the position where the protruding length is L2, use the grating ruler to detect the actual displacement L22 of the piston rod, and the actual volume V22 is: V22=S×L22;

Step 3: Close the material container so that the material undergoes a chemical reaction in the material container. During the chemical reaction, the piston rod is kept at a position with a protruding length of L2 through the self-locking of the motor, and the pressure sensor is detected in real time to obtain The corresponding relationship between the pressure detection signal and time in the material chemical reaction process is obtained; the corresponding relationship between the expansion force and time is represented by the corresponding relationship between the pressure detection signal and time.

The characteristics of the detection method of the constant volume and quantitative expansion force detection device of the present invention are also:

In said step 1, when the piston rod of the container protrudes at the position of length L1 under the drive of the motor, the actual protruding length L11 of the piston rod of the container is obtained by detection with a grating ruler, and there is: V11=S×L11 ; The volume V1 before the chemical reaction expansion of the material is corrected to V11;

In said step 2, when the container piston rod protrudes at the position of length L2 under the drive of the motor, the actual protruding length L22 of the container piston rod is obtained by using the grating ruler detection, and there is: V22=S×L22 ; The volume V2 after the chemical reaction expansion of the material is corrected to V22.

Compared with the prior art, the beneficial effects of the present invention are reflected in:

1. The pressure sensor provided in the detection device of the present invention is located outside the material container and does not contact with the material, which is convenient for repair and maintenance and has a long service life.

2. In the present invention, a position sensor is set, and the position sensor is used to detect the longitudinal position of the piston rod of the container, and then calculate the volume change of the container during the detection process, so as to conveniently calculate the expansion force of the material under various volumes, and realize accurate volume calculation .

3. In the present invention, the pressure sensor and the grating ruler are arranged together to realize the detection of the pulling pressure and the position detection of the piston rod of the container. The overall structure is simple and compact, the volume is small, and the detection function is reliable. Through the analysis and processing of the detection signals of the grating ruler and the pressure sensor , can obtain test results conveniently and quickly.

Description of drawings

Fig. 1 is a schematic diagram of the three-dimensional structure of the present invention;

Figure 2a is a schematic diagram of the facade structure of the present invention;

Figure 2b is a schematic diagram of the planar structure of the present invention;

Labels in the figure: 1 Material container, 2 Pressure sensor, 3 Bracket, 4 Position sensor, 5 Longitudinal guide rail, 6 Cylinder body, 7 Nut, 8 Screw rod, 9 Bearing seat, 10 Coupling, 11 Reducer, 12 Motor , 13 material inlets.

Detailed ways

Referring to Fig. 1, Fig. 2a and Fig. 2b, the structural form of the constant volume quantitative expansion force detection device in this embodiment is:

On the detection platform arranged horizontally, one end is arranged as a material container 1, and the other end is arranged as a motor 12. The container piston rod of the material container 1 protrudes from the front end of the material container, faces the end where the motor 12 is located, and is arranged along the longitudinal direction of the detection platform. ; Between the motor 12 and the piston rod, a screw nut transmission structure consisting of a screw rod 8 and a nut 7 is set, the screw rod 8 supported by the bearing seat 9 is driven and rotated by the motor 12 through the reducer 11, and the nut 7 is fixedly connected to the circle One end of the cylinder body 6, a pressure sensor 2 is arranged in series between the other end of the cylinder body 3 and the piston rod of the container, the cylinder body 6 is used to drive the longitudinal movement of the piston rod of the container, and the pressure sensor 2 is used to detect the position of the piston rod of the container. The tension force received; the position sensor 4 is set on the side of the cylinder 6 on the detection platform, and the position sensor 4 is used to detect the longitudinal position of the piston rod of the container; the material inlet 13 is set at the tail of the material container 1.

In the specific implementation, a pair of longitudinal guide rails 5 are arranged in parallel on the detection platform, and a slide block is provided to slide and cooperate with the longitudinal guide wheels 5. 3 is fixedly connected with the slider, so that the longitudinal movement of the cylinder 6 is guided on the longitudinal guide rail 5, the position sensor 4 is a grating ruler, and the grating ruler is fixedly installed on one side of the bracket 3 to link with the cylinder 6 and the bracket 3.

The positive and negative rotation of the motor 12 makes the piston rod of the container move longitudinally in the material container through the reducer 11, the coupling 10, the screw nut transmission structure, the cylinder 6 and the pressure sensor 2; the cylinder 6 passes through the bracket 3 and The slider is supported on the guide rail 5; the grating scale moves together with the slider and the cylinder to detect the displacement of the piston rod of the container, and the pressure sensor is connected in series between the piston rod of the container and the cylinder to detect the tension and pressure, and the control unit is set , the control unit is used to control the rotation of the motor, and is also used to control the collection of detection signals from the pressure sensor and the grating ruler, and complete the detection of constant volume and quantitative expansion force.

Definition: S is the cross-sectional area of the inner cavity of the material container; V1 is the volume before the material chemical reaction expands; V2 is the volume after the material chemical reaction expands; L1 is the V1 volume state when the material is in the chemical reaction expansion state, the container The protruding length of the piston rod, L1=V1/S; L2 is the protruding length of the piston rod of the container when the material is in the V2 volume state after chemical reaction expansion, L2=V2/S:

The constant volume quantitative expansion force detection method is carried out as follows:

Step 1: Calculate the extension length L1 of the piston rod of the container according to the volume V1 of the known material chemical reaction before expansion; the piston rod of the container is driven by the motor to extend at the position of length L1, and the material is sucked from the material inlet 13 to In the material container, the filling of the material container is completed;

When driven by the motor, the container piston rod protrudes at the position of length L1, use the grating ruler to detect and obtain the actual protruding length L11 of the container piston rod, and: V11=S×L11; The volume of V1 is corrected to V11;

Step 2: Calculate the extension length L2 of the piston rod of the container according to the volume V2 after the expansion of the known material chemical reaction; the piston rod of the container is driven by the motor to move within the set time from the position of the extension length L1 At the position where the protruding length is L2, use the grating ruler to detect the actual displacement L22 of the piston rod, and the actual volume V22 is: V22=S×L22;

When driven by the motor, the container piston rod protrudes at the position of length L2, use the grating ruler to detect and obtain the actual protruding length L22 of the container piston rod, and there is: V22=S×L22; after the material is chemically expanded The volume of V2 is corrected to V22.

Step 3: Close the material container so that the material undergoes a chemical reaction in the material container. During the chemical reaction, the piston rod is kept at a position with a protruding length of L2 through the self-locking of the motor, and the pressure sensor 2 is detected in real time. The pressure detection signal obtains the corresponding relationship between the pressure detection signal and time during the material chemical reaction process; the corresponding relationship between the expansion force and time is represented by the corresponding relationship between the pressure detection signal and time.

Claims (3)

1. a kind of constant volume quantitatively expands force checking device, it is characterized in that：

On in horizontally disposed detection platform, one end is arranged as material container (1), and the other end is arranged as motor (12), described The container plunger bar of material container (1) stretches out in the front end of material container, towards motor (12) institute at one end and along detection platform Be longitudinally arranged；The screw nut driving being made up of screw mandrel (8) and nut (7) is set in the motor (12) between piston rod Structure, the screw mandrel (8) are driven by reductor (11) by motor (12) and rotated, and the nut (7) is connected firmly in cylinder (6) One end, pressure sensor (2) is arranged in series between the other end and container plunger bar of the cylinder (3), utilizes cylinder (6) vertically moving for container plunger bar is driven, and as the pressure suffered by pressure sensor (2) detection container piston rod；Institute The side set location sensor (4) for being located at cylinder (6) in detection platform is stated, the position sensor (4) is grating scale, Gu Surely it is arranged on a side stand (3) and is linked with cylinder (6) and support (3), utilizes position sensor (4) to detect the container and live The lengthwise position of stopper rod；The afterbody of the material container (1) is provided with material inlet (13)；

Definition：

S is the cross sectional area of material container content cavity；

V1 is the volume before material chemical reaction expansion；

V2 is the volume after material chemical reaction expansion；

L1 is is under the V1 volume states before chemical reaction expands when material, the extension elongation of container plunger bar, L1=V1/S；

L2 is is under V2 volume states after chemical reaction expands when material, the extension elongation of container plunger bar, L2=V2/S：

The detection method that the constant volume quantitatively expands force checking device is carried out as follows：

Step 1：The extension elongation L1 for obtaining container plunger bar is calculated according to the volume V1 before the chemical reaction expansion of known material； Container plunger bar is set to stretch out on the position that length is L1 by motor driving, material is drawn into material container from material inlet (13) It is interior, complete the filling to material container；

Step 2：The extension elongation L2 for obtaining container plunger bar is calculated according to the volume V2 after the chemical reaction expansion of known material； Container plunger bar is set to be moved to extension elongation within the time set as L2 from extension elongation is L1 position by motor driving Position on, the actual displacement amount L22 for obtaining piston rod is detected using grating scale, and there is the actual volume V22 to be：V22=S × L22；

Step 3：Material container is closed, material is chemically reacted in material container, during the chemical reaction, Piston rod is maintained on the position that extension elongation is L2 by motor self-locking, gather pressure sensor (2) detection in real time and obtain Pressure detecting signal, obtain material chemical reaction process in pressure detecting signal and the corresponding relation of time；With the pressure The corresponding relation of power detection signal and time characterize expansive force and the corresponding relation of time.

2. constant volume according to claim 1 quantitatively expands force checking device, it is characterized in that：

In the step 1, under being driven in motor, container plunger bar is stretched out when on the position that length is L1, utilizes grating Chi detection obtains the actual extension elongation L11 of container plunger bar, and has：V11=S × L11；The material is chemically reacted and expanded Preceding volume V1 is modified to V11；

In the step 2, under being driven in motor, container plunger bar is stretched out when on the position that length is L2, utilizes grating Chi detection obtains the actual extension elongation L22 of container plunger bar, and has：V22=S × L22；The material is chemically reacted and expanded Volume V2 afterwards is modified to V22.

3. constant volume quantitatively expands force checking device according to claim 1, it is characterized in that：Set in the detection platform vertical Direction guiding rail (5), and there is sliding block to be slidably matched with the longitudinal rail (5), set a pair of brackets (3) to exist the cylinder (6) Both sides fixed clamp in the form of filling the span of a man's arms, the support (3) are fixedly connected with a slide block, and make vertically moving in institute for cylinder (6) State and be oriented on longitudinal rail (5).