Slurry shock-resistant pressure gauge

Abstract

The utility model discloses a mud anti-shock pressure gauge, comprising a display mechanism, the input end of the display mechanism is provided with a housing, and the housing is provided with a connector; wherein a pressure sensing detection mechanism is arranged in the display mechanism, the input end of the pressure sensing detection mechanism is connected with a transmission piece, and the output end of the pressure sensing detection mechanism is connected with a display screen. By arranging the pressure sensing detection mechanism, pressure can be directly converted into electronic numerical values, the electronic numerical values are displayed through the display device, remote transmission can be carried out, and the detection accuracy and the detection speed are guaranteed. The structure and parts of an existing mud anti-seismic meter are designed, improved and rearranged, so that the mechanical part of the mud anti-seismic meter and an intelligent control system can complement each other, and the mud anti-seismic meter can better serve related manufacturers of petroleum drilling and production equipment and oil field sites.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial automation instruments, in particular to a mud anti-vibration pressure gauge. Background Art

[0002] With the increasing advancement of oil drilling technology, the supporting oil drilling equipment is also constantly upgraded and improved, and the demand for mud seismic pressure gauges is increasing. In particular, in recent years, oil fields are in urgent need of a mud seismic pressure gauge with electrical signal output. Most of the existing mud seismic pressure gauges on the market are mechanical rotary or pointer instruments. Those with electrical signal output are relatively rare, and they cannot be read and monitored remotely. Utility Model Content

[0003] In view of the above defects or shortcomings, the purpose of the utility model is to provide a mud shock-resistant pressure gauge.

[0004] In order to achieve the above purpose, the technical solution of the utility model is:

[0005] A mud seismic pressure gauge comprises: a display mechanism, wherein the input end of the display mechanism is provided with a shell, and a connector is installed on the shell; wherein a pressure sensing detection mechanism is provided inside the display mechanism, the input end of the pressure sensing detection mechanism is connected to a transmission component, and the output end of the pressure sensing detection mechanism is connected to a display screen.

[0006] The pressure sensing detection mechanism comprises: an angular displacement sensor installed in the upper shell, the input end of the angular displacement sensor is connected to the transmission element, and the output end of the angular displacement sensor is connected to the display screen.

[0007] The transmission member comprises: a mounting member arranged in the housing and a diaphragm group arranged in the connector, the mounting member is connected to the diaphragm group, and the mounting member is connected to the input end of the angular displacement sensor.

[0008] The mounting member is connected to the diaphragm group via an ejector pin, the end of the ejector pin is connected to the diaphragm group, and the tip of the ejector pin is connected to the mounting member.

[0009] A sealing gasket is arranged at the diaphragm group.

[0010] The mounting part includes: a fork spring mounted on the diaphragm group in the shell, foil resistance strain gauges are mounted on the inner and outer sides of the two arms outside the middle part of the fork spring, and tinned copper wires are connected to the foil resistance strain gauges, which are connected to the output end of the angular displacement sensor.

[0011] The tinned copper wire is wrapped with a polyvinyl chloride tube.

[0012] The display mechanism is provided with a dial connected to the pressure sensing detection mechanism.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model provides a mud seismic pressure gauge, which can directly convert pressure into electronic value by setting a pressure sensing detection mechanism, display it through a display device, and can be remotely transmitted, thereby ensuring the accuracy and speed of detection. The utility model is based on the existing mud seismic gauge, and improves and re-arranges the structure and components of the existing mud seismic gauge, so that the mechanical part of the mud seismic gauge and the intelligent control system can complement each other, and can better serve the relevant manufacturers of oil drilling equipment and oil field sites. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the utility model mud seismic pressure gauge Figure 1 ;

[0016] Figure 2 This is a schematic diagram of the structure of the utility model mud seismic pressure gauge Figure 2 ;

[0017] Figure 3 This is a schematic diagram of the fork spring assembly of the utility model mud anti-seismic pressure gauge Figure 1 ;

[0018] Figure 4 This is a schematic diagram of the fork spring assembly of the utility model mud anti-seismic pressure gauge Figure 2 ;

[0019] Figure 5 This is the circuit principle diagram of the utility model mud anti-seismic pressure gauge;

[0020] Figure 6 This is a circuit wiring diagram of a mud anti-seismic pressure gauge of the utility model.

[0021] In the figure, 1 is a display mechanism; 2 is a housing; 3 is a connector; 4 is an ejector pin; 11 is an angular displacement sensor; 12 is a display screen; 13 is a dial; 21 is a mounting member; 31 is a diaphragm group; 32 is a sealing gasket; 211 is a fork spring; 212 is a foil resistance strain gauge; 213 is a tinned copper wire; 214 is a polyvinyl chloride tube. DETAILED DESCRIPTION

[0022] The utility model will be described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0023] like Figure 1 , 2 As shown, the utility model provides a mud seismic-resistant pressure gauge, comprising: a display mechanism 1, wherein the input end of the display mechanism 1 is provided with a shell 2, and a connector 3 is installed on the shell 2; wherein a pressure sensing detection mechanism is provided in the display mechanism 1, the input end of the pressure sensing detection mechanism is connected to a transmission component, the output end of the pressure sensing detection mechanism is connected to a display screen 12, and the display mechanism 1 is provided with a dial 13 connected to the pressure sensing detection mechanism.

[0024] Specifically, the pressure sensing detection mechanism includes: an angular displacement sensor 11 installed in the upper shell 2 , the input end of the angular displacement sensor 11 is connected to the transmission element, and the output end of the angular displacement sensor 11 is connected to the display screen 12 .

[0025] The transmission component includes: a mounting component 21 disposed in the housing 2 and a diaphragm group 31 disposed in the connector 3 , the mounting component 21 is connected to the diaphragm group 31 , and the mounting component 21 is connected to the input end of the angular displacement sensor 11 .

[0026] The mounting member 21 is connected to the diaphragm group 31 via an ejector pin 4 , the end of the ejector pin 4 is connected to the diaphragm group 31 , the tip of the ejector pin 4 is connected to the mounting member 21 , and a sealing gasket 32 ​​is provided at the diaphragm group 31 in the utility model.

[0027] like Figure 3 , 4 As shown, the mounting member 21 includes: a fork spring 211 mounted on the diaphragm group 31 in the housing 2, and foil resistance strain gauges 212 are mounted on the inner and outer sides of the two outer arms in the middle of the fork spring 211, and the foil resistance strain gauge 212 is connected to a tinned copper wire 213, and the tinned copper wire 213 is connected to the output end of the angular displacement sensor 11.

[0028] The utility model can indicate the measured pressure value on site, and also provides a visual window to display the real-time pressure value: MPa / psi, which is consistent with the pressure value transmitted to the remote measuring point, thus realizing on-site indication / display, centralized detection and remote control.

[0029] The working principle is: the measured medium transmits force to the diaphragm 31 and the ejector pin 4 in turn through the sealing gasket 32 ​​at the lower end of the instrument, and the force is concentratedly transmitted to the fork spring 211 through the top of the ejector pin 4. The fork spring 211 is deformed by the force and then drives the transmission mechanism thereon. The transmission mechanism amplifies the pressure in proportion and indicates it through a rotating dial or pointer.

[0030] When the dial or pointer rotates, the angular displacement sensor 11 on it also rotates. After the angle of rotation of the angular displacement sensor 11 is calculated, the pressure value electrical signal is transmitted to the instrument display interface and the remote control module in real time. At this time, the instrument can not only display the pressure value locally, but also ensure the consistency between the pressure value of the remote control module and the pressure value displayed locally.

[0031] The working principle of the fork spring 211: two left-right symmetrical thin beams are used with resistance strain gauges attached to the inner and outer sides. When the force F acts on the center of the lower end of the fork spring, the inner and outer beams produce elastic deformation at the same time. The deformation amounts of the inner and outer beams are different but the forces are balanced (both are F / 2). An angle α / 2 is formed on both sides at the same time. After the deformation is transmitted to the transmission mechanism at the same time, a central rotation angle α is formed, and the pressure value is indicated by a dial or a pointer, thereby realizing the function of the instrument.

[0032] like Figure 6 As shown, the principle of the fork spring remote transmission function is: the two symmetrical beams ensure that the fork spring is balanced when stressed, and also ensure the consistency, stability, linearity and repeatability of the deformation of the fork spring. When the fork spring is deformed under stress, the resistance value of the resistance strain gauge attached to the thin beam and forming the bridge changes, which destroys the balance of the bridge and outputs a set of electrical signals 1. At the same time, the angular displacement sensor on the dial or pointer also generates a set of corresponding electrical signals 2. Both electrical signals 1 and 2 are transmitted to the intelligent control system of the mud anti-seismic pressure gauge. After a series of operations, the intelligent control system transmits an electrical signal 3 to the display module and the remote control module. After receiving the electrical signal 3, the display module and the remote control module display the real-time pressure value at their respective terminals.

[0033] Principle of digital display module: A set of angular displacement sensors is installed behind the pointer shaft of the mud seismic resistance gauge. When the mechanical pointer moves, the angular displacement sensor calculates the angle and displays the real-time pressure value through the digital display module. The digital display module is divided into MPa display and psi display, which are switched by the button on the right end of the digital display module.

[0034] like Figure 5 As shown, the circuit principle is: when performing zero point compensation, when the initial unbalanced output (uncompensated, "A" and "B" are short-circuited) is positive, that is, in the same direction as the pressure output, the socket core "2" is connected to "A"; otherwise, it is connected to "B".

[0035] Foil resistance strain gauge parameters: The foil material is constantan BMn-40-1.5, with uniform thickness, bright and smooth surface, and no defects such as pinholes. After rolling, it should be vacuum annealed to stabilize the performance; the film is polyvinyl alcohol acetaldehyde glue; the strain gauge is made by photolithography. The resistance value is 250±20Ω. The resistance value should be stable; the foil grid should be uniform and straight, without short-circuit grid, and the local width should not be less than 3 / 4 of the nominal value. It should be firmly bonded to the bottom film, without "jumping grid", bubbles, and impurities; the cornea should be smooth and flat, with uniform thickness and no wrinkles; the lead welding should be firm, without cold welding, the solder joints should be beautiful, and the position should be moderate.

[0036] Main performance of strain gauge

[0037] (1) Sensitivity coefficient 2.0~2.2

[0038] (2) Mechanical hysteresis ≤ 15 με;

[0039] (3) Creep 0~-0.2%;

[0040] (4) Zero drift <2με / H (room temperature);

[0041] (5) Insulation resistance>3×104MΩ;

[0042] (6) Resistance temperature coefficient ±1.5×10-5 1 / ℃

[0043] It is obvious to those skilled in the art that the above-mentioned specific examples are only preferred schemes of the present invention. Therefore, the improvements and changes that may be made by those skilled in the art to certain parts of the present invention still reflect the principles of the present invention and achieve the purpose of the present invention, and all belong to the scope of protection of the present invention.

Claims

1. A mud seismic pressure gauge, characterized in that: include: A display mechanism (1), wherein the input end of the display mechanism (1) is provided with a housing (2), and a connector (3) is mounted on the housing (2); wherein a pressure sensing detection mechanism is provided inside the display mechanism (1), the input end of the pressure sensing detection mechanism is connected to a transmission element, and the output end of the pressure sensing detection mechanism is connected to a display screen (12).

2. The mud seismic pressure gauge according to claim 1, characterized in that: The pressure sensing detection mechanism comprises: an angular displacement sensor (11) installed in the upper housing (2), the input end of the angular displacement sensor (11) being connected to the transmission element, and the output end of the angular displacement sensor (11) being connected to the display screen (12).

3. The mud seismic pressure gauge according to claim 2, characterized in that: The transmission component comprises: a mounting component (21) arranged in the housing (2) and a diaphragm group (31) arranged in the connector (3); the mounting component (21) is connected to the diaphragm group (31); and the mounting component (21) is connected to an input end of the angular displacement sensor (11).

4. The mud seismic pressure gauge according to claim 3, characterized in that: The mounting member (21) and the diaphragm group (31) are connected via an ejector pin (4), the end of the ejector pin (4) is connected to the diaphragm group (31), and the tip of the ejector pin (4) is connected to the mounting member (21).

5. The mud seismic pressure gauge according to claim 3 or 4, characterized in that: A sealing gasket (32) is provided at the diaphragm group (31).

6. The mud seismic pressure gauge according to claim 3, characterized in that: The mounting member (21) comprises: a fork spring (211) mounted on a diaphragm group (31) in a housing (2); a foil resistance strain gauge (212) is mounted on inner and outer sides of two arms on the outside of the middle portion of the fork spring (211); a tinned copper wire (213) is connected to the foil resistance strain gauge (212); and the tinned copper wire (213) is connected to an output end of the angular displacement sensor (11).

7. The mud seismic pressure gauge according to claim 6, characterized in that: The tinned copper wire (213) is wrapped with a polyvinyl chloride tube (214).

8. The mud seismic pressure gauge according to claim 1, characterized in that: The display mechanism (1) is provided with a dial (13) connected to the pressure sensing detection mechanism.

Images