Capacitive pressure transmitter with high precision

Abstract

The utility model relates to the technical field of pressure transmitters, and discloses a high-precision capacitive pressure transmitter, which comprises a connecting piece, the connecting piece is sleeved on the outer side of a detection end, a shell is connected with the shell through the connecting piece, the connecting piece comprises a double-end screw tube, the double-end screw tube and a sleeve body arranged in the end part of the double-end screw tube are sleeved on the outer side of the detection end, and the detection end is connected with the shell through the connecting piece. And a sealing ring for pushing the sleeve body to cling to the surface of the detection end is meshed in the double-end screw tube. The detection end is of a detachable structure, in the using process, the detection ends with different measurement ranges are replaced, different detection requirements are met, an existing capacitive pressure transmitter is of an integral structure, the detection end cannot be replaced, the application range is limited, meanwhile, the detection end is independently replaced, and the cost is low. The problem that the maintenance cost of overall replacement equipment of the capacitive pressure transmitter is high is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to pressure transmitter technical field, specifically to a high precision capacitive pressure transmitter. BACKGROUND

[0002] Capacitive pressure transmitter is a kind of device that converts physical pressure parameter into standard electrical signal, mainly by pressure measuring element sensor, measuring circuit and process connecting piece three parts.

[0003] The existing capacitive pressure transmitter is all integral structure, after long-term use, detection end can be aged, to cause detection data inaccuracy, detection end can not be replaced individually, and the late maintenance cost is high. INVENTION CONTENTS

[0004] The purpose of the application is a kind of high precision capacitive pressure transmitter, solve the problem that detection end can not be replaced.

[0005] To solve the above technical problems, the utility model is realized by the following technical schemes:

[0006] The utility model relates to a kind of high precision capacitive pressure transmitter, including connecting piece, the connecting piece is set on the outside of detection end, the shell is connected with shell by connecting piece, the connecting piece includes double-end screw pipe, the double-end screw pipe and the sleeve of the sleeve installed in double-end screw pipe end side is set on the outside of detection end, the double-end screw pipe is engaged with the sealing ring of the sleeve of the sleeve that push is installed in double-end screw pipe end side and is attached to the surface of detection end.

[0007] Detection end includes pipe body, the bottom end of pipe body is open, insulating frame is installed in pipe body, cavity is formed between baffle and insulating frame, metal diaphragm is installed in the opening of pipe body, metal diaphragm is connected with movable electrode in cavity by the first center column passing through baffle, fixed electrode is arranged on movable electrode, the second center column of fixed electrode connection passes through insulating frame;

[0008] By increasing the conductive sheet on movable electrode and fixed electrode, the conductive sheet of movable electrode and the conductive sheet of fixed electrode are spaced distribution, so as to improve the sensitivity of induction in the movement of movable electrode, to improve detection precision.

[0009] Detection end is detachable structure, in the process of using, the detection end of different measurement range is replaced, meets different detection needs, the existing capacitive pressure transmitter is all integral structure, detection end can not be replaced, and the scope of application is limited.

[0010] Further, wiring terminal is installed in the shell, interface is arranged on the surface of shell, the end of detection end is inserted into interface and is connected with wiring terminal, and double-end screw pipe is cooperatively installed in interface;

[0011] The top end of the shell is provided with a conductive column, which is electrically connected with a jack provided with a socket, so that data transmission is realized.

[0012] Further, the double-end screw pipe and the sleeve body slide along the surface of the detection end.

[0013] The position of the double-end screw pipe and the sleeve body on the surface of the detection end is adjusted, so that after the detection end is connected with the terminal, the position of the double-end screw pipe is adjusted, thereby realizing the threaded connection between the double-end screw pipe and the interface.

[0014] Further, the port device of the double-end screw pipe is provided with a ring groove, and the outer side of the sleeve body is provided with a convex ring, which is fitted and installed in the ring groove.

[0015] The convex ring and the ring groove are limitedly fitted, so that the double-end screw pipe drives the sleeve body to slide along the surface of the detection end, and the sleeve body is made of rubber material.

[0016] Further, the outer surface of the sleeve body is a conical surface one, the inner wall of the sealing ring is a conical surface two, and the conical surface two is sleeved on the outer side of the conical surface one.

[0017] The conical surface two of the sealing ring is pushed to tightly contact the conical surface one of the sleeve body by the inner thread of the double-end screw pipe, so that the conical surface one of the sleeve body realizes sealing by the surface of the detection end.

[0018] Further, a plurality of deep holes are formed in the end of the sealing ring, so that a tool is inserted into the deep hole to drive the sealing ring to rotate.

[0019] The utility model has the following beneficial effects:

[0020] (1) The detection end of the utility model is a detachable structure, different detection ends of different measurement ranges can be replaced in the use process, different detection requirements can be met, the existing capacitive pressure transmitter is a whole structure, the detection end cannot be replaced, the application range is limited, and the detection end is replaced alone, so that the problem of high equipment maintenance cost of the whole replacement of the capacitive pressure transmitter is solved.

[0021] Of course, any product implementing the utility model does not necessarily need to achieve all the advantages mentioned above. DRAWINGS

[0022] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor.

[0023] Figure 1 The utility model discloses a connecting piece installation schematic drawing;

[0024] Figure 2 The utility model discloses a connecting piece cutaway schematic drawing;

[0025] Figure 3 The utility model discloses Figure 2 The utility model discloses a place A enlarged schematic drawing;

[0026] Figure 4 The utility model discloses a partial cutaway schematic drawing;

[0027] Figure 5 The utility model discloses a whole schematic drawing;

[0028] Figure 6 The utility model discloses a detection end internal schematic drawing;

[0029] In the drawing, the component list represented by each sign is as follows:

[0030] In the drawing, 1, connecting piece;11, double -end screw pipe;111, ring groove;12, sealing ring;121, deep hole;13, cover body;131, convex ring;2, detection end;21, pipe body;22, metal diaphragm;23, first center column;24, stopper;25, movable electrode;26, fixed electrode;27, second center column;28, insulating frame;3, shell;31, interface;4, wiring terminal; Specific implementation

[0031] The technical scheme in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model and not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0032] Please refer to Figures 1-6 The utility model discloses a high precision capacitive pressure transmitter, including connecting piece 1, connecting piece 1 cover and set in the outside of detection end 2, the shell 3 is connected with the shell 3 through connecting piece 1, and connecting piece 1 contains double -end screw pipe 11, and the cover body 13 installed in the end of double -end screw pipe 11 is covered and set in the outside of detection end 2, and the sealing ring 12 that double -end screw pipe 11 is engaged has the push cover body 13 and is close to the surface of detection end 2.

[0033] The detection end 2 comprises a tube body 21, the bottom end of the tube body 21 is open, a stopper 24 and an insulating frame 28 are installed in the tube body 21, a cavity is formed between the stopper 24 and the insulating frame 28, a metal diaphragm 22 is installed in the opening of the tube body 21, the metal diaphragm 22 is connected with a movable electrode 25 in the cavity through a first center column 23 penetrating the stopper 24, a fixed electrode 26 is arranged on the movable electrode 25, and a second center column 27 connected with the fixed electrode 26 penetrates the insulating frame 28;

[0034] By increasing the conductive sheets on the movable electrode 25 and the fixed electrode 26, the conductive sheets on the movable electrode 25 and the fixed electrode 26 are spaced apart, so that the sensitivity of the induction is improved during the movement of the movable electrode 25, and the detection accuracy is improved.

[0035] The detection end 2 is a detachable structure, different detection ends 2 with different measurement ranges can be replaced during use to meet different detection requirements, and the existing capacitive pressure transducer is a whole structure, the detection end 2 cannot be replaced, and the application range is limited.

[0036] The shell 3 is provided with a terminal 4, the surface of the shell 3 is provided with an interface 31, the end of the detection end 2 extends into the interface 31 and is connected with the terminal 4, and the double-head screw pipe 11 is matched and installed in the interface 31;

[0037] The top end of the shell 3 is provided with a conductive column, the conductive column is electrically connected with the insertion hole of the terminal 4, so that the data transmission is realized.

[0038] The double-head screw pipe 11 and the sleeve 13 slide along the surface of the detection end 2;

[0039] The positions of the double-head screw pipe 11 and the sleeve 13 on the surface of the detection end 2 are adjusted, the position of the double-head screw pipe 11 is adjusted after the detection end 2 is connected with the terminal 4, so that the double-head screw pipe 11 is threadedly connected with the interface 31.

[0040] The end of the double-head screw pipe 11 is provided with a ring groove 111, the outer side of the sleeve 13 is provided with a convex ring 131, and the convex ring 131 is matched and installed in the ring groove 111;

[0041] The convex ring 131 is limited and matched with the ring groove 111, so that the double-head screw pipe 11 drives the sleeve 13 to slide along the surface of the detection end 2, and the sleeve 13 is made of rubber material.

[0042] The outer surface of the sleeve 13 is a tapered surface one, the inner wall of the sealing ring 12 is a tapered surface two, and the tapered surface two is sleeved outside the tapered surface one;

[0043] When the sealing ring 12 is matched with the internal thread of the double-end screw pipe 11, the tapered surface two of the sealing ring 12 pushes the tapered surface one of the sleeve body 13 to tightly contact the surface of the detection end 2, and the surface of the sleeve body 13 tightly contacts the surface of the detection end 2 to realize sealing.

[0044] The end of the sealing ring 12 is provided with a plurality of deep holes 121, so that the tool is inserted into the deep hole 121 to drive the sealing ring 12 to rotate.

[0045] The preferred embodiments disclosed above are only used for helping to describe the utility model. The preferred embodiments do not describe all the details and limit the utility model to the specific implementation manners. Obviously, according to the content of the specification, many modifications and changes can be made. The specification selects and specifically describes these embodiments, so as to better explain the principle and practical application of the utility model, so that the persons skilled in the art can well understand and utilize the utility model. The utility model is limited by the claims and the whole scope and equivalents thereof.

Claims

1. A high-precision capacitive pressure transmitter, comprising a connecting piece (1) and a shell (3), the connecting piece (1) is sleeved outside a detection end (2), and the shell (3) is connected with the shell (3) through the connecting piece (1), characterized in that: the connecting piece (1) comprises a double-end screw pipe (11), the double-end screw pipe (11) and a sleeve (13) installed in the end of the double-end screw pipe (11) are sleeved outside the detection end (2); a sealing ring (12) is engaged in the double-end screw pipe (11) and adheres to the surface of the detection end (2).

2. The high-precision capacitive pressure transmitter according to claim 1, characterized in that: A wiring terminal (4) is installed in the shell (3), an interface (31) is arranged on the surface of the shell (3), the end of the detection end (2) is inserted into the interface (31) and connected with the wiring terminal (4), and the double-end screw pipe (11) is cooperatively installed in the interface (31).

3. The high-precision capacitive pressure transmitter according to claim 1, characterized in that: The double-end screw pipe (11) and the sleeve (13) slide along the surface of the detection end (2).

4. The high-precision capacitive pressure transmitter according to claim 1, characterized in that: The port device of the double-end screw pipe (11) is provided with a ring groove (111); the outer side of the sleeve (13) is provided with a convex ring (131), and the convex ring (131) is cooperatively installed in the ring groove (111).

5. The high-precision capacitive pressure transmitter according to claim 4, characterized in that: The outer surface of the sleeve (13) is a conical surface I; the inner wall of the sealing ring (12) is a conical surface II, and the conical surface II is sleeved outside the conical surface I.

6. The high-precision capacitive pressure transmitter according to claim 1, characterized in that: A plurality of deep holes (121) are arranged in the end of the sealing ring (12).

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