Support frame of pressure transmitter and pressure transmitter

Abstract

The present invention relates to the field of pressure transmitters, and in particular to a support frame for a pressure transmitter and a pressure transmitter having the support frame; a support frame for a pressure transmitter, comprising a core seat of the pressure transmitter having an installation cavity, characterized in that it also comprises a frame body firmly arranged at the end of the installation cavity of the core seat, and a positioning unit for a wiring terminal is arranged on the surface of the frame body; the present invention arranges a frame body in the installation cavity of the core seat, and positions the wiring terminal by the positioning unit on the frame body, so that the position of the wiring terminal relative to the core seat is stable, and the problem of inclination and offset of the wiring terminal in the prior art will not occur, thereby avoiding various problems that may be caused by the inclination of the wiring terminal.

Description

Technical Field

[0001] The invention relates to the field of pressure transmitters, and in particular to a support frame of a pressure transmitter and a pressure transmitter having the support frame. Background Art

[0002] Pressure transmitter is a device that converts pressure into pneumatic or electric signals for control and remote transmission. It is one of the most common sensors used in industrial fields and is widely used in various industrial automatic control environments, involving water conservancy and hydropower, railway transportation, intelligent buildings, production automatic control, aerospace, military industry, petrochemical, oil wells, electric power, ships, machine tools, pipelines and many other industries.

[0003] High integration and modularization of products are the trend of modern industrial production and life, which facilitates subsequent replacement and maintenance, saving time and space.

[0004] The pressure transmitter is composed of pressure sensor, chip and other parts. The pressure sensor, circuit board and terminal block are made into a whole, and the core seat is used to accommodate all the electrical components. Through the glue filling and curing, the electrical components inside the fixed cavity are fixed, and the terminal block is left to connect the socket, thus forming a complete module. When the components are broken, the module is directly replaced.

[0005] The output circuit board has various jack positions, and the position of the terminal block after being directly inserted into the circuit board is therefore extremely inconsistent. The finished product output has an unsightly terminal position, and sometimes the position is biased to the edge of the circuit board, causing interference between the terminal block and the core seat, which brings great difficulties to production.

[0006] Therefore, there is an urgent need for a solution that can solve the problem of interference between the wiring terminals and the core seat caused by the multiple positions of the output circuit jacks, while unifying the positions and solving the aesthetic problem. Summary of the invention

[0007] In view of the problems existing in the prior art, the present invention designs a support frame for a pressure transmitter and a pressure transmitter.

[0008] The technical solution of the present invention is as follows:

[0009] A support frame for a pressure transmitter includes a core seat of the pressure transmitter with an installation cavity, and is characterized in that it also includes a frame body firmly arranged at the end of the core seat installation cavity, and a positioning unit for connecting terminals is arranged on the surface of the frame body.

[0010] Furthermore, the frame includes a frame body, a support portion is extended from one side surface of the frame body, and the end of the support portion abuts against the bottom surface of the installation cavity, so that the frame can be stably set at the end of the core seat installation cavity.

[0011] Furthermore, the support portion is provided with at least one notch.

[0012] Furthermore, the inner wall of the installation cavity is provided with a positioning groove along the axis, and the frame includes a frame body, and the outer wall of the frame body is provided with a positioning protrusion that cooperates with the positioning groove.

[0013] Furthermore, the inner wall of the installation cavity is provided with a first conical surface shrinking from the end of the installation cavity to the bottom surface, and the frame includes a frame body, and the outer side surface of the frame body is provided with a second conical surface matching the first conical surface.

[0014] Furthermore, the positioning unit comprises positioning blocks symmetrically arranged on the frame, the positioning blocks are provided with positioning grooves for accommodating and positioning the ends of the connecting terminals, and a hollow area for the connecting terminal pins to pass through is formed between the two positioning blocks.

[0015] Furthermore, a through hole communicating with the positioning groove and penetrating the positioning block is provided at the right-angle corner of the positioning groove.

[0016] Furthermore, a step surface is provided in the through hole.

[0017] Furthermore, a reinforcing plate is provided between the frame and the side of the positioning block, and the upper surface of the reinforcing plate is lower than the upper end surface of the frame.

[0018] A pressure transmitter comprises a core seat of the pressure transmitter having an installation cavity, a pressure sensor is arranged at one end of the core seat, a compensation circuit board and a signal processing circuit board are arranged in the installation cavity, and the characteristic is that it also comprises a frame body firmly arranged at the end of the installation cavity of the core seat, a positioning unit for a wiring terminal is arranged on the surface of the frame body, and the wiring terminal is connected to the signal processing circuit board.

[0019] In summary, the present invention has the following beneficial effects:

[0020] 1. The present invention arranges a frame in the installation cavity of the core seat, and positions the terminal block through a positioning unit on the frame. The position of the terminal block relative to the core seat is stable, and the problem of inclination and offset of the terminal block in the prior art will not occur, thereby avoiding various problems that may be caused by the inclination of the terminal block.

[0021] 2. The present invention positions the wiring terminals by means of a frame. In the subsequent glue filling process, the wiring terminals are effectively limited, which greatly improves the convenience of workers' operation.

[0022] 3. The frame provided in the present invention is used to position and hold the wiring terminals, so that the wiring terminals and the signal processing circuit board can be connected by soft wires, which is convenient for flexible arrangement. In the subsequent use process, the force applied to the wiring terminals during the plugging and unplugging process will be borne by the support frame and the potting glue, and will not be transmitted to the signal processing circuit board, thereby extending the service life of the components. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a partial cross-sectional schematic diagram of Example 1;

[0024] Figure 2 is a three-dimensional schematic diagram of the frame of Example 1;

[0025] Figure 3 is a cross-sectional schematic diagram of Example 1;

[0026] Figure 4 It is a schematic diagram of the connection between the frame and the core seat of Example 2;

[0027] Figure 5 It is a schematic diagram of the connection between the frame and the core seat of Example 3;

[0028] Figure 6 It is a partial cross-sectional schematic diagram of a pressure transmitter;

[0029] In the figure, 1 is a core seat, 10 is a mounting cavity, 101 is a positioning groove, 102 is a first cone surface,

[0030] 2 is a frame, 20 is a frame body, 21 is a support portion, 210 is a notch, 201 is a positioning protrusion, 202 is a second cone surface, and 22 is a reinforcing plate;

[0031] 3 is a positioning unit, 30 is a positioning block, 301 is a positioning groove, 302 is a through hole, 303 is a step surface, and 304 is a hollow area;

[0032] 4 is a pressure sensor, 5 is a compensation circuit board, 6 is a signal processing circuit board, and 7 is a wiring terminal. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Example 1

[0035] See also Figure 1As shown, a support frame of a pressure transmitter includes a core seat 1 of the pressure transmitter with an installation cavity 10, and is characterized in that it also includes a frame body 2 firmly arranged at the end of the core seat installation cavity, and a positioning unit 3 for connecting terminals is provided on the surface of the frame body 2.

[0036] In order to solve the problems existing in the prior art, the present invention arranges a frame at the end of the mounting cavity of the core seat. The frame supports and positions the wiring terminals through positioning units arranged on the surface of the frame, so that the wiring terminals are freed from the restrictions of the position of the wire plug holes of the signal processing circuit board and can be connected to the signal processing circuit board through soft wires, which is convenient for flexible arrangement. At this time, the wiring terminals will no longer interfere with the core seat, thus overcoming the problems of different directions and inclination angles of the wiring terminals in the prior art. The wiring terminals positioned by the positioning unit are also convenient for subsequent assembly. The stable setting described in the present invention means that the positions of the frame and the mounting cavity of the core seat are relatively stable and reliable. If there are many ways to achieve stable and reliable positions, the present invention also provides many ways.

[0037] Further, see Figure 2 and Figure 3 As shown, the frame 2 includes a frame body 20, and a support portion 21 is extended to form a side surface of the frame body 20, and the end of the support portion 21 is against the bottom surface of the installation cavity 10, so that the frame can be firmly set at the end of the core seat installation cavity. The structure of the frame is defined here. The frame body is a component that matches the shape of the inner cavity of the core seat, and it fits with the inner wall of the core seat installation cavity. It can change with the change of the shape of the core seat installation cavity. In this embodiment, the support of the frame body is achieved by the contact between the support portion and the bottom surface of the installation cavity, thereby maintaining the stable position of the frame body in the installation cavity, and the support portion is arranged along the wall of the installation cavity.

[0038] Furthermore, at least one notch 210 is provided on the support portion 21 , and the provision of the notch is equivalent to forming a flow channel. In the subsequent glue pouring process, the potting glue can fill the entire installation cavity through the notch.

[0039] Example 2

[0040] See also Figure 1 As shown, a support frame of a pressure transmitter includes a core seat 1 of the pressure transmitter with an installation cavity 10, and is characterized in that it also includes a frame body 2 firmly arranged at the end of the core seat installation cavity, and a positioning unit 3 for connecting terminals is provided on the surface of the frame body 2.

[0041] Further, see Figure 4As shown, the inner wall of the installation cavity 10 is provided with a positioning groove 101 along the axis, and the frame 2 includes a frame body 20, and the outer wall of the frame body 20 is provided with a positioning protrusion 201 that cooperates with the positioning groove. In this embodiment, the position of the frame and the installation cavity is stabilized by the cooperation of the positioning protrusion and the positioning groove. The positioning protrusion and the positioning groove also have the function of circumferential limiting, which prevents the frame from rotating in the installation cavity, thereby better ensuring the consistency of the wiring terminals limitedly installed on the frame.

[0042] Example 3

[0043] See also Figure 1 As shown, a support frame of a pressure transmitter includes a core seat 1 of the pressure transmitter with an installation cavity 10, and is characterized in that it also includes a frame body 2 firmly arranged at the end of the core seat installation cavity, and a positioning unit 3 for connecting terminals is provided on the surface of the frame body 2.

[0044] Further, see Figure 5 As shown, the inner wall of the installation cavity 10 is provided with a first conical surface 102 which shrinks from the end of the installation cavity to the bottom surface, and the frame 2 includes a frame body 20, and the outer side surface of the frame body 20 is provided with a second conical surface 202 which cooperates with the first conical surface. In this embodiment, the stable setting of the frame and the core seat is achieved by the cooperation of the two conical surfaces.

[0045] See also Figure 2 As shown, the positioning unit 3 includes positioning blocks 30 symmetrically arranged on the frame, and the positioning blocks are provided with positioning grooves 301 for accommodating and positioning the ends of the wiring terminals. A hollow area 304 for the wiring terminal pins to pass through is formed between the two positioning blocks, and the four corners of the wiring terminals are respectively embedded in the positioning grooves of the positioning holes. Preferably, the wiring terminals and the positioning grooves are interference fit, and the positioning grooves realize the fixation and positioning of the wiring terminals, thereby ensuring the reliability and stability of the subsequent connection between the wiring terminals and the core seat. In the subsequent glue pouring process, the potting glue will fill the hollow area and connect with the wiring terminals to form a stable and reliable connection relationship.

[0046] Furthermore, a through hole 302 is provided at the right-angle corner of the positioning groove 301, which is connected to the positioning groove and passes through the positioning block. The through hole allows the side walls of the adjacent positioning grooves to have a certain deformable space, which is convenient for the wiring terminal to be embedded and installed in the positioning groove. The additional through hole can also be used as a cavity for subsequent glue pouring, further increasing the bonding area between the potting glue and the frame.

[0047] Furthermore, a step surface 303 is provided in the through hole 302. In the subsequent glue pouring process, the potting glue will fill the entire through hole and form an annular body on the step surface. The diameter of the annular body is larger than the diameter of the center hole of the step surface, thereby ensuring the connection reliability between the frame and the potting glue. A tapered hole structure design can also be adopted in the through hole here, so that the tapered potting glue column formed in the through hole can also firmly connect the frame.

[0048] Furthermore, a reinforcing plate 22 is provided between the frame 2 and the side of the positioning block, and the upper surface of the reinforcing plate is lower than the upper end surface of the frame. The provided reinforcing plate improves the connection strength between the frame and the positioning block. Furthermore, the upper surface of the reinforcing plate is lower than the upper end surface of the frame. During the glue pouring process, the upper surface of the reinforcing plate can also be covered with potting glue. The potting glue is connected to the potting glue in the core seat mounting cavity, and the contact area of ​​the potting glue to the frame can also be increased, thereby improving the connection reliability between the two.

[0049] See also Figure 6 As shown, a pressure transmitter comprises a core seat 1 of the pressure transmitter having an installation cavity 10, a pressure sensor 4 is provided at one end of the core seat 1, a compensation circuit board 5 and a signal processing circuit board 6 are provided in the installation cavity 10, and the characteristic is that it also comprises a frame 2 firmly arranged at the end of the core seat installation cavity, a positioning unit 3 for a wiring terminal is provided on the surface of the frame, and the wiring terminal 7 is connected to the signal processing circuit board.

[0050] In summary, the present invention has the following beneficial effects:

[0051] 1. The present invention arranges a frame in the installation cavity of the core seat, and positions the terminal block through a positioning unit on the frame. The position of the terminal block relative to the core seat is stable, and the problem of inclination and offset of the terminal block in the prior art will not occur, thereby avoiding various problems that may be caused by the inclination of the terminal block.

[0052] 2. The present invention positions the wiring terminals by means of a frame. In the subsequent glue filling process, the wiring terminals are effectively limited, which greatly improves the convenience of workers' operation.

[0053] 3. The frame provided in the present invention is used to position and hold the wiring terminals, so that the wiring terminals and the signal processing circuit board can be connected by soft wires, which is convenient for flexible arrangement. In the subsequent use process, the force applied to the wiring terminals during the plugging and unplugging process will be borne by the support frame and the potting glue, and will not be transmitted to the signal processing circuit board, thereby extending the service life of the components.

Claims

1. A support frame for a pressure transmitter, comprising a core seat of the pressure transmitter having a mounting cavity, characterized in that: It also includes a frame body firmly arranged at the end of the core seat installation cavity, and the surface of the frame body is provided with a positioning unit for supporting and positioning the wiring terminal; the positioning unit includes positioning blocks symmetrically arranged on the frame body, and the positioning blocks are provided with positioning grooves for accommodating and positioning the ends of the wiring terminals; a hollow area for the wiring terminal pins to pass through is formed between the two positioning blocks, and a through hole connected to the positioning groove and passing through the positioning block is provided at the right-angle corner of the positioning groove, and a step surface is provided in the through hole, and a reinforcing plate is provided between the frame body and the side of the positioning block, and the upper surface of the reinforcing plate is lower than the upper end surface of the frame body.

2. The support frame of a pressure transmitter according to claim 1, characterized in that: The frame comprises a frame body, a support portion is formed on one side surface of the frame body, and the end of the support portion abuts against the bottom surface of the installation cavity, so that the frame can be stably arranged at the end of the core seat installation cavity.

3. A support frame for a pressure transmitter according to claim 2, characterized in that: The supporting portion is provided with at least one notch.

4. The support frame of a pressure transmitter according to claim 1, characterized in that: The inner wall of the installation cavity is provided with a positioning groove along the axis, and the frame body comprises a frame body, and the outer wall of the frame body is provided with a positioning protrusion matched with the positioning groove.

5. The support frame of a pressure transmitter according to claim 1, characterized in that: The inner wall of the installation cavity is provided with a first conical surface which shrinks from the end of the installation cavity to the bottom surface. The frame includes a frame body, and the outer side surface of the frame body is provided with a second conical surface which matches the first conical surface.

6. A pressure transmitter, which adopts the support frame as claimed in claim 1, comprising a core seat of the pressure transmitter having a mounting cavity, a pressure sensor is arranged at one end of the core seat, and a compensation circuit board and a signal processing circuit board are arranged in the mounting cavity, characterized in that: It also includes a frame body which is firmly arranged at the end of the core seat installation cavity. The surface of the frame body is provided with a positioning unit for supporting and positioning the connection terminal. The connection terminal is connected to the signal processing circuit board.

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