CN115144120A - A spherical exhaust pressure measuring tube - Google Patents

Abstract

The invention relates to a spherical exhaust pressure measuring tube, which belongs to the technical field of pressure monitoring equipment. Opened on the lower side of the installation barrel, the exhaust hole is located between the pressure measuring pipe and the bottom of the installation barrel, and the exhaust hole is communicated with the interior of the installation barrel; the sphere is arranged inside the installation barrel, and the sphere is slidably sealed with the inner wall of the installation barrel. , the driving mechanism is arranged at the bottom of the installation barrel; the present invention cooperates with the sphere through the exhaust hole on the installation barrel, not only can the position of the sphere be adjusted by the driving mechanism, so that the bubble column in the pressure measuring tube and the water body can be discharged through the exhaust hole. In addition, when the pressure measuring tube normally monitors the pressure, the installation barrel on the side of the exhaust hole can be sealed by the sphere, so as to prevent external gas from entering the pressure measuring tube, and improve the detection accuracy of the pressure measuring tube; The tube is easy to use, has high measurement accuracy, and has strong practicability, which is worthy of promotion.

Description

A spherical exhaust pressure measuring tube

technical field

The invention belongs to the technical field of pressure monitoring equipment, and in particular relates to a spherical exhaust pressure measuring tube.

Background technique

A piezometric tube is a thin tube-shaped instrument for measuring the relative pressure of a liquid. The height of the water column in the tube is used to represent the osmotic pressure. Widely used in water conservancy, petroleum, chemical industry, construction machinery manufacturing, coal mining, shipbuilding, aviation, automobile, medical equipment and other industries. The pressure measuring tube is generally a vertically placed glass tube. The upper end is open to the atmosphere, and the lower end is connected to the side wall of the container through a pipeline to communicate with the liquid to be measured. The liquid in the container enters the glass tube through the pipeline, and the pressure measuring tube is under the action of atmospheric pressure. The same as the height h of the liquid level in the container. Accordingly, the relative pressure of the liquid inside the container can be obtained P=γh, where γ is the bulk density of the liquid. In the field of hydraulic engineering, the piezometer mainly reflects the seepage pressure by the height of the water level in the pipe. In the monitoring of the original body of the hydraulic structure, the piezometer is usually used to monitor the groundwater level, the wetting line of the dam, the pore water pressure, and the surrounding gates. (Station) Dam seepage, dam foundation seepage pressure, concrete gate and dam uplift pressure, external water pressure of tunnels and culverts, etc. However, when using the piezometric tube to monitor the pressure of the dam body, air often appears inside the piezometric tube, because the gas in the water body enters the piezometric tube with the pipeline. With the continuous accumulation of air in the piezometric tube, as shown in Figure 1, a bubble column with a certain thickness will be formed in the piezometric tube. At this time, when the pressure of the water body is measured, the water column in the piezometric tube will appear liquid level because of the bubble column. The false height makes the measured value h ₁ of the piezometric tube higher than the actual liquid level value h of the water body, resulting in a large deviation of the water body pressure measurement, and it is impossible to obtain the water body pressure data accurately. At present, in order to avoid the bubble column in the pressure measuring tube from affecting the accuracy of pressure monitoring, the operator generally uses a stick to agitate the water column in the pressure measuring tube to discharge the bubble column in the water column. However, by stirring the water column with the stick to exhaust, not only can the gas in the pressure measuring tube be completely exhausted, but also part of the air will enter the inside of the water column in the pressure measuring tube, and the pressure in the water body cannot be accurately monitored.

SUMMARY OF THE INVENTION

In view of this, the present invention provides a spherical exhaust pressure measuring tube in order to solve the deficiencies in the prior art.

The technical scheme of the present invention is: a spherical exhaust pressure measuring tube, comprising a pressure measuring tube, a mounting barrel, an exhaust hole, a sphere, and a driving mechanism; the mounting barrel is horizontally arranged directly below the pressure measuring tube, and the mounting barrel The upper side of the pressure measuring tube is vertically connected with the bottom of the pressure measuring tube, and the pressure measuring tube is communicated with the inside of the installation barrel: the exhaust hole is opened on the lower side of the installation barrel, and the exhaust hole is located between the pressure measuring tube and the bottom of the installation barrel. The exhaust hole is communicated with the inside of the installation barrel; the sphere is arranged inside the installation barrel, and the sphere is slidably and sealedly connected to the inner wall of the installation barrel. When the sphere is displaced between the input port of the installation barrel and the pressure measuring pipe, the pressure measuring pipe Connected with the exhaust hole, when the sphere is displaced between the exhaust hole and the pressure measuring tube, the pressure measuring tube is communicated with the input port of the installation barrel; the driving mechanism is arranged at the bottom of the installation barrel to realize the displacement of the driving sphere.

Preferably, the drive mechanism includes a connecting rod that is coaxial with the bottom of the mounting barrel, the connecting rod is slidably connected to the mounting barrel, one end of the connecting rod passes through the mounting barrel and is fixedly connected to the sphere, and the other end is sheathed and fixed with a handle.

Preferably, a telescopic bellows is sleeved on the outer side of one end of the connecting rod close to the sphere, one end of the telescopic bellows is fixedly connected to the sphere, and the bottom of the installation barrel is sleeved outside the connecting rod with an external threaded connection ring, which is connected to the installation The bottom of the barrel is threadedly connected, the outer threaded connection ring is fixedly connected with the end of the telescopic bellows away from the sphere, and the connecting rod is slidably connected with the outer threaded connection ring.

Preferably, an annular sliding cavity is provided on the inner wall of the installation barrel between the exhaust hole and the input port of the installation barrel, and the sphere is slidably and sealedly connected to the annular sliding cavity.

Preferably, the side of the mounting barrel close to the pressure measuring tube is provided with a connecting pipe, the connecting pipe is fixedly connected with the mounting barrel, one end of the connecting pipe passes through the inner wall of the mounting barrel and communicates with the annular sliding cavity, and the other end is connected with the pressure measuring pipe Threaded mate connection.

Preferably, the installation barrel is provided with a spring on the side of the sphere away from the exhaust hole, one end of the spring is connected to the sphere, and the other end of the spring is connected to the inner wall of the installation barrel.

Preferably, a limit ring is pierced inside the input port of the installation barrel, the limit ring is fixedly connected with the inner wall of the installation barrel, and the end of the spring away from the sphere is connected with the limit ring.

Compared with the prior art, the spherical exhaust pressure measuring tube provided by the present invention is used in cooperation with the spherical body through the exhaust hole on the installation barrel, and not only can the position of the spherical body be adjusted by the driving mechanism, so that the pressure measuring tube in the pressure measuring tube can be adjusted. The bubble column and the water body are discharged through the exhaust hole, and when the pressure measuring tube is monitoring the pressure normally, the installation barrel on the side of the exhaust hole can be sealed by the sphere to prevent the external gas from entering the pressure measuring tube and improve the detection of the pressure measuring tube. The accuracy of the device; through the use of the connecting rod and the handle, it is convenient for the operator to manually drive the ball to move quickly when the pressure measuring tube is exhausted, and the exhaust pipe is opened and closed to improve the convenience of operation; by connecting The telescopic bellows on the rod and the externally threaded connecting ring can not only displace the connecting rod in the installation barrel, but also the shrunken bellows discharges the water and air on the side of the exhaust hole close to the externally threaded connecting ring, and it is When exhausting, it can also be used in conjunction with the sphere to prevent external gas from entering the installation barrel and the pressure measuring tube, and further improve the accuracy of the pressure measuring tube detection; through the use of the annular sliding cavity inside the installation barrel and the sphere, it can be realized by the sphere. Both ends of the annular sliding cavity are closed, which not only prevents the external gas from entering the pressure measuring tube through the annular sliding cavity, but also prevents the liquid in the pipeline communicating with the container to be measured from entering the annular sliding cavity when the gas column and liquid are discharged through the exhaust hole. And it flows out from the exhaust hole, which further facilitates the detection of the pressure measuring tube; by installing the connecting pipe on the barrel, it can be quickly disassembled and installed with the pressure measuring tube, and the operator can flexibly install the pressure measuring tube with unaccurate accuracy according to the detection needs. Improve the flexibility of detection; by installing the spring inside the barrel and using the limit ring, the ball can always be in a sealed connection with the curved surface of the right end of the annular sliding cavity when the air is not exhausted, so as to prevent the liquid from venting from the exhaust hole. The pressure measuring tube of the invention is convenient to use, has high measurement accuracy and strong practicability, and is worthy of popularization.

Description of drawings

Fig. 1 is the schematic diagram of measuring height difference of piezometric tube caused by air bubbles;

Fig. 2 is the structural schematic diagram of the pressure measuring tube of the present invention;

Fig. 3 is the schematic diagram of the vent opening of the present invention;

FIG. 4 is a schematic diagram of closing the vent hole of the present invention.

Detailed ways

The present invention provides a spherical exhaust pressure measuring tube, and the present invention will be described below with reference to the structural schematic diagrams of FIGS. 1 to 4 .

Example 1

As shown in Figure 2, a spherical exhaust pressure measuring tube includes a pressure measuring tube 1, a mounting barrel 2, an exhaust hole 3, a sphere 4, and a driving mechanism; the mounting barrel 2 is horizontally arranged directly below the pressure measuring tube 1 , the upper side of the installation barrel 2 is vertically connected with the bottom of the pressure measuring pipe 1, and the pressure measuring pipe 1 is communicated with the interior of the installation barrel 2: the exhaust hole 3 is opened on the lower side of the installation barrel 2, and the exhaust hole 3 is located in the measuring barrel 2. Between the pressure pipe 1 and the bottom of the installation barrel 2, the exhaust hole 3 communicates with the interior of the installation barrel 2; the sphere 4 is arranged inside the installation barrel 2, and the sphere 4 is slidably and sealedly connected to the inner wall of the installation barrel 2, When the sphere 4 is displaced between the input port of the installation barrel 2 and the pressure measuring tube 1, the pressure measuring tube 1 is communicated with the exhaust hole 3, and when the sphere is displaced between the exhaust hole 3 and the pressure measuring tube 1, the pressure measuring tube 1 The pipe 1 is connected to the input port of the installation barrel 2, and the ball can be used for the ball; the exhaust hole on the installation barrel is used in conjunction with the ball, not only the position of the ball can be adjusted by the driving mechanism, so that the bubble column in the pressure measuring tube and the water body can pass through. The exhaust hole is discharged, and the sphere can also seal the exhaust hole and the installation barrel on one side when the pressure measuring tube is normally monitoring the pressure, so as to prevent the external gas from entering the pressure measuring tube and improve the accuracy of the pressure measuring tube detection. ; The driving mechanism is arranged at the bottom of the installation barrel 2 to realize the displacement of the driving ball 4 .

Preferably, the driving mechanism includes a connecting rod 21 which is pierced through the bottom of the installation barrel 2 and is coaxial with it. The connecting rod 21 is slidably connected to the installation barrel 2 , and one end of the connecting rod 21 is fixedly connected to the ball 4 through the installation barrel 2 , and the other side is fixedly connected to the ball 4 . A handle is fixed on one end of the sleeve, and the connecting rod and the handle are used together, so that the operator can quickly manually drive the sphere to displace, open and close the exhaust pipe, and improve the convenience of operation when the pressure measuring pipe is exhausted.

Preferably, the side of the installation barrel 2 close to the pressure measuring tube 1 is provided with a connection pipe 51 , the connection pipe 51 is fixedly connected with the installation barrel 2 , and one end of the connection pipe 51 passes through the inner wall of the installation barrel 2 and the annular sliding cavity 41 The other end is threadedly connected with the pressure measuring pipe 1. By installing the connecting pipe on the barrel, it can be quickly disassembled and installed with the pressure measuring pipe. flexibility.

Example 2

In order to further improve the detection accuracy of the pressure measuring tube, through the expansion and contraction bellows on the connecting rod and the external thread connecting ring, not only the connecting rod can be displaced in the installation barrel, but also the shrinking bellows is connected to the exhaust hole close to the external thread The water on one side of the ring is exhausted by drinking air, and it can also be used in conjunction with the sphere when it is not exhausted to prevent external air from entering the installation barrel and the pressure measuring tube.

Preferably, a telescopic bellows 31 is sleeved on the outer side of one end of the connecting rod 21 close to the sphere 4, one end of the telescopic bellows 31 is fixedly connected with the sphere 4, and the bottom of the installation barrel 2 is located on the outer side of the connecting rod 21. An external thread connecting ring is sleeved 32. The external thread connecting ring 32 is threadedly connected to the bottom of the installation barrel 2, the external thread connecting ring 32 is fixedly connected to the end of the telescopic bellows 31 away from the ball 4, and the connecting rod 21 is slidingly connected to the external thread connecting ring 32.

Preferably, an annular sliding cavity 41 is provided on the inner wall of the installation barrel 2 between the exhaust hole 3 and the input port of the installation barrel 2 , the sphere 4 is slidably and sealedly connected to the annular sliding cavity 41 , and the two ends of the annular sliding cavity 41 are respectively There is an arc surface between the inner wall of the installation barrel 2, and the sphere 4 is attached and connected to the arc surface. The two ends of the sliding cavity are closed, which not only prevents the external gas from entering the pressure measuring tube through the annular sliding cavity, but also prevents the liquid in the pipeline communicating with the container to be measured from entering the annular sliding cavity when the gas column and liquid are discharged through the exhaust hole. Outflow from the vent hole for further convenience of piezometric inspection.

Example 3

In order to further improve the convenience of using the pressure measuring tube, the spring inside the barrel is installed in conjunction with the limit ring, so that the sphere can always be in a sealed connection with the curved surface of the right end of the annular sliding cavity when the air is not exhausted. Liquid leaking from vent.

Preferably, the installation barrel 2 is provided with a spring 61 on the side of the ball body 4 away from the exhaust hole 3 .

Preferably, a limit ring 71 is passed through the input port of the installation barrel 2 , the limit ring 71 is fixedly connected with the inner wall of the installation barrel 2 , and the end of the spring 61 away from the ball 4 is connected with the limit ring 71 .

When it is necessary to measure the pressure of the liquid inside the container or the pressure of the liquid in the pipeline, as shown in Figure 3, after connecting the input port of the installation barrel of the device through the pipeline connected to the container or the pipeline itself, the liquid inside the container passes through the pipeline. , Install the barrel into the pressure measuring tube, according to the height value of the liquid level in the pressure measuring tube, obtain the pressure of the container liquid through P = γh, γ is the bulk density of the liquid; as shown in Figure 1, when bubbles appear in the pressure measuring tube , the operator holds the handle and pushes the connecting rod to the inside of the installation barrel. The force of the operator to push the connecting rod is greater than the pressure of the spring and the liquid on the input port side of the installation barrel (you can also install a valve on the input port side of the installation barrel to avoid liquid The pressure of the sphere is too large) As shown in Figure 4, the sphere is displaced from the right end of the annular sliding cavity to the left end. After the liquid and air in the pressure measuring tube are discharged through the exhaust hole, the operator releases the handle, and the sphere is under the action of the spring. Automatically move to the right end of the annular sliding cavity to seal the annular sliding cavity. At the same time, the retracted bellows discharges the liquid accumulated in the installation barrel on the right side of the exhaust hole, and the liquid in the container or pipeline to be measured re-enters the pressure measuring gas pipe. The operator follows the normal procedure for the pressure calculation.

The invention provides a spherical exhaust pressure measuring tube, which is used in cooperation with the spherical body through the exhaust hole on the installation barrel, and not only can the position of the spherical body be adjusted by the driving mechanism, so that the bubble column in the pressure measuring tube and the water body can pass through the exhaust gas. When the pressure measuring tube is normally monitoring the pressure, the installation barrel on the side of the exhaust hole can be sealed by the sphere to prevent external gas from entering the pressure measuring tube and improve the accuracy of the pressure measuring tube detection; through the connecting rod It is used in conjunction with the handle, so that the operator can quickly manually drive the sphere to move when the pressure measuring tube is exhausted, and open and close the exhaust pipe to improve the convenience of operation; through the telescopic bellows on the connecting rod and the The external threaded connecting ring can not only make the connecting rod move in the installation barrel, but also the bellows after shrinking can discharge the water and air on the side of the exhaust hole close to the external threaded connecting ring, and can also connect with the sphere when not exhausted. It can be used together to prevent the external gas from entering the installation barrel and the pressure measuring tube, and further improve the detection accuracy of the pressure measuring tube. It is closed, which not only prevents the external gas from entering the pressure measuring tube through the annular sliding cavity, but also prevents the liquid in the pipeline communicating with the container to be measured from entering the annular sliding cavity and flowing out from the exhaust hole when the gas column and liquid are discharged through the exhaust hole. Further the convenience of piezometric detection; by installing the connecting pipe on the barrel, it can be quickly disassembled and installed with the piezometric pipe, and the operator can flexibly install the unaccurate piezometric pipe according to the detection needs to improve the flexibility of detection; The spring inside the installation barrel is used in conjunction with the limit ring, so that the ball can always be in a sealed connection with the curved surface of the right end of the annular sliding cavity when the air is not exhausted, so as to prevent the liquid from leaking from the exhaust hole and further improve the pressure measurement. The use of the tube is convenient; the piezometric tube of the present invention is convenient to use, has high measurement accuracy and strong practicability, and is worthy of popularization.

The above disclosures are only preferred specific embodiments of the present invention, however, the embodiments of the present invention are not limited thereto, and any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims (7)

1. a spherical type exhaust pressure measuring tube, comprising a pressure measuring tube (1), is characterized in that, also comprises: The installation barrel (2) is horizontally arranged directly below the pressure measuring pipe (1), the upper side of the installation barrel (2) is vertically connected with the bottom of the pressure measuring pipe (1), and the pressure measuring pipe (1) is connected to the installation barrel (2) Internal connectivity: The exhaust hole (3) is opened on the lower side of the installation barrel (2). The exhaust hole (3) is located between the pressure measuring pipe (1) and the bottom of the installation barrel (2). The exhaust hole (3) communicate with the interior of the installation barrel (2); The sphere (4) is arranged inside the installation barrel (2), and the sphere (4) is slidably and sealedly connected to the inner wall of the installation barrel (2). When the pressure pipe (1) is between the pressure measuring pipe (1) and the exhaust hole (3), when the sphere is displaced between the exhaust hole (3) and the pressure measuring pipe (1), the pressure measuring pipe (1) ) is communicated with the input port of the installation barrel (2); The driving mechanism is arranged at the bottom of the installation barrel (2), and is used to realize the displacement of the driving ball (4). 2. A spherical exhaust pressure measuring tube according to claim 1, characterized in that the drive mechanism comprises a connecting rod (21) which is arranged at the bottom of the installation barrel (2) and is coaxial with the connecting rod. (21) is slidably connected with the installation barrel (2), one end of the connecting rod (21) is fixedly connected with the ball (4) through the installation barrel (2), and a handle is sheathed and fixed at the other end. 3. A spherical exhaust pressure measuring tube according to claim 2, wherein a telescopic bellows (31) is sleeved on the outer side of one end of the connecting rod (21) close to the sphere (4), and the telescopic corrugated One end of the pipe (31) is fixedly connected with the sphere (4). The bottom of the installation barrel (2) is located on the outer side of the connecting rod (21) and is sleeved with an externally threaded connecting ring (32), and the externally threaded connecting ring (32) is connected to the mounting barrel (2). ) is threadedly connected at the bottom, the external thread connecting ring (32) is fixedly connected with the end of the telescopic bellows (31) away from the ball (4), and the connecting rod (21) is slidingly connected with the external thread connecting ring (32). 4. A spherical exhaust pressure measuring tube according to claim 1, wherein the installation barrel (2) is located on the inner wall between the exhaust hole (3) and the input port of the installation barrel (2) An annular sliding cavity (41) is opened, and the sphere (4) is slidably and sealedly connected with the annular sliding cavity (41). 5. A spherical exhaust pressure measuring pipe according to claim 4, characterized in that, a connecting pipe (51) is provided on one side of the installation barrel (2) close to the pressure measuring pipe (1), and is connected to The pipe (51) is fixedly connected with the installation barrel (2), one end of the connection pipe (51) passes through the inner wall of the installation barrel (2) and is communicated with the annular sliding cavity (41), and the other end is connected with the pressure measuring pipe (1) in a threaded fit . 6. A spherical exhaust pressure measuring tube according to claim 1, characterized in that, the mounting barrel (2) is provided with a spring (61) on the side of the sphere (4) away from the exhaust hole (3) ), one end of the spring (61) is connected with the ball (4), and the other end is connected with the inner wall of the installation barrel (2). 7. A spherical exhaust pressure measuring tube according to claim 6, characterized in that, a limit ring (71) is pierced inside the input port of the installation barrel (2), and the limit ring (71) and the The inner wall of the installation barrel (2) is fixedly connected, and the end of the spring (61) away from the ball (4) is connected with the limit ring (71).

Images