CN204085586U

CN204085586U - One seed coat holder bar flowmeter pressure head

Info

Publication number: CN204085586U
Application number: CN201420523164.8U
Authority: CN
Inventors: 江华根
Original assignee: PITOBAR (BEIJING) INSTRUMENT Co Ltd
Current assignee: Beijing Pitor Technology Co ltd
Priority date: 2014-09-12
Filing date: 2014-09-12
Publication date: 2015-01-07
Anticipated expiration: 2024-09-12

Abstract

The utility model discloses a seed coat holder bar flowmeter pressure head, described pressure head comprises pressure head body, the tube chamber of described pressure head tube body is divided into static tube joint and total head pipe box, described ram-air pipe cover is set on the ram-air pipe of Pi Tuoba flowmeter, and the pressure end of described ram-air pipe stretches out from total head pipe box lower end, the bevel end face deviated from mutually with total head thief hole is arranged in the lower end of static tube joint.This pressure head has that structure is simple, and reasonable in design, degree of accuracy is high, not easily the feature such as blocking.

Description

One seed coat holder bar flowmeter pressure head

Technical field

The utility model relates to a seed coat holder bar flowmeter pressure head.

Background technology

Pi Tuoba flowmeter manufactures and designs according to the ISO3966 velocity-area method of the measurement-employing pitot static tube of fluid flow " in the closed conduct " international standard.Pi Tuoba flowmeter tube wall is cylindrical housings, is inside inserted with the ram-air pipe of one and housing axis being parallel, and the space between ram-air pipe and tube wall forms static tube upper part, and ram-air pipe ends cut forms total head pressure tap.Flowmeter tube wall lower end is welded with pressure head body, has two passages in pressure head body, and a passage is static tube lower part, and communicate with static tube upper part formation static tube, and channel end forms static pressure pressure tap on pressure head body; Another passage passes through for ram-air pipe.

Inserted in pipeline along cross-section of pipeline diameter by Pi Tuoba flowmeter during use, pitot hole axis overlaps with conduit axis, and pitot hole aims at flow path direction.Static pressure pressure tap measures hydrostatic pressure, and total head measured hole measures fluid total head, can calculate fluid volume flow by other data such as the differential pressure that obtains and pipeline drift diameter.

Must ensure during measurement that pitot hole and baroport inner fluid keep static, otherwise the pressure recorded is just not accurate enough.When measuring the medium having impurity or energy condensation, may blocking be produced in pressure head, affect measuring accuracy.Therefore the degree of accuracy of the pressure head shapes flow meter of flowmeter and impact in serviceable life larger.

Utility model content

For prior art Problems existing, the utility model provides a kind of novel Pi Tuoba flowmeter pressure head to solve the problems referred to above, and its structure is simple, and reasonable in design, degree of accuracy is high, not easily blocks.

For achieving the above object, the utility model one seed coat holder bar flowmeter pressure head, described pressure head comprises pressure head body, the tube chamber of described pressure head body is divided into static tube joint and total head pipe box, described ram-air pipe cover is set on the ram-air pipe of Pi Tuoba flowmeter, and the pressure end of described ram-air pipe stretches out from total head pipe box lower end, described static tube joint forms static tube pressure end, and the bevel end face deviated from mutually with total head pressure port is arranged in lower end.

Further, described total head clear internal diameter and described ram-air pipe external diameter match, and total head pipe box inwall and ram-air pipe outer wall are fitted tightly.

Further, the bevel angle of the bevel end face of the lower end of described static tube joint is 45 degree.

Further, bandy " water chestnut " type is arranged in the lower end of described ram-air pipe.

Further, described total head pipe box and described ram-air pipe are coaxially arranged.

Further, described pressure head body upper end is provided with the plug plugged with its lower end of described Pi Tuoba flowmeter, is welded and fixed after grafting.

Pi Tuoba flowmeter pressure head of the present utility model is nested with in use on Pi Tuoba flowmeter sleeve pipe, the pitot hole of ram-air pipe lower end is just to carrying out flow path direction, in ram-air pipe, medium is close to static, due to the impact of pressure head body profile, medium can change flowing through its flow field of pressure head body timesharing, near the baroport of static tube joint lower end, form voltage stabilizing district, therefore total head and the tonometric degree of accuracy of static pressure higher, and impurity is not easily piled up in test tube.When measuring the flow containing condensables medium, due to the special shape of pressure port, the condensation product produced in flowmeter can flow along test tube inwall, reduces blocking occurrence probability.

Accompanying drawing explanation

Fig. 1 is the cut-open view of the utility model Pi Tuoba flowmeter pressure head;

Fig. 2 be in Fig. 1 A-A to cut-open view;

Fig. 3 is the vertical view of the utility model Pi Tuoba flowmeter pressure head;

Fig. 4 is the upward view of the utility model Pi Tuoba flowmeter pressure head;

Fig. 5 is that the utility model Pi Tuoba flowmeter pressure head is nested with the first side view on ram-air pipe;

Fig. 6 is that the utility model Pi Tuoba flowmeter pressure head is nested with the second side view on ram-air pipe;

Schematic diagram after the installation of Fig. 7 the utility model Pi Tuoba flowmeter pressure head.

Embodiment

Below, with reference to accompanying drawing, the utility model is more fully illustrated, shown in the drawings of exemplary embodiment of the present utility model.But the utility model can be presented as multiple multi-form, and should not be construed as the exemplary embodiment being confined to describe here.But, these embodiments are provided, thus make the utility model comprehensively with complete, and scope of the present utility model is fully conveyed to those of ordinary skill in the art.

For ease of illustrating, here can use such as " on ", the space relative terms such as D score " left side " " right side ", for illustration of the element of shown in figure or the feature relation relative to another element or feature.It should be understood that except the orientation shown in figure, spatial terminology is intended to comprise device different azimuth in use or operation.Such as, if the device in figure is squeezed, be stated as the element being positioned at other elements or feature D score will be positioned at other elements or feature " on ".Therefore, exemplary term D score can comprise upper and lower both orientation.Device can otherwise be located (90-degree rotation or be positioned at other orientation), and space used here illustrates relatively can correspondingly explain.

As shown in Figure 1, Figure 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 and Figure 7 shows that the specific embodiment of the utility model Pi Tuoba flowmeter pressure head, there is the plug 2 protruded with the column of its axes normal the upper end of the body of pressure in the present embodiment 1, plug 2 and the lower end grafting of Pi Tuoba flowmeter sleeve pipe 10, be welded and fixed after grafting.The tube cavity of pressure head body 1 is divided into two passages, be respectively static tube joint 3 and total head pipe box 6, the axis being parallel of the axis of static tube joint 3 and total head pipe box 6 and pressure 1, total head pipe box 6 is coaxial with ram-air pipe 9, internal diameter and ram-air pipe 9 external diameter of total head pipe box 6 match, ram-air pipe 9 is passed through in total head pipe box 6, makes ram-air pipe 9 outer wall and total head pipe box 6 inwall fit tightly simultaneously.The lower ending opening of static tube joint 3 forms one 45 ° of bevel end faces 4, after mounting bevel end face 4 and the pitot hole 8 of ram-air pipe 9 opposing to, static tube joint 3 forms baroport 5 on bevel end face 4.Ram-air pipe 9 lower end bends laterally, forms the warp architecture 7 of " water chestnut " type, the vertical cutting interruption-forming pitot hole 8 of ram-air pipe 9 end.The sleeve upper end of Pi Tuoba flowmeter connects a differential pressure output module 11.

Claims

1. a seed coat holder bar flowmeter pressure head, it is characterized in that, described pressure head comprises pressure head tube body, the tube chamber of described pressure head tube body is divided into static tube joint and total head pipe box, described ram-air pipe cover is set on the ram-air pipe of Pi Tuoba flowmeter, and the pressure end of described ram-air pipe stretches out from total head pipe box lower end, the bevel end face deviated from mutually with total head pressure port is arranged in the lower end of static tube joint.

2. Pi Tuoba flowmeter pressure head as claimed in claim 1, it is characterized in that, described total head clear internal diameter and described ram-air pipe external diameter match, and total head pipe box inwall and ram-air pipe outer wall are fitted tightly.

3. Pi Tuoba flowmeter pressure head as claimed in claim 1, it is characterized in that, the bevel angle of the bevel end face of the lower end of described static tube joint is 45 degree.

4. Pi Tuoba flowmeter pressure head as claimed in claim 1, it is characterized in that, bandy " water chestnut " type is arranged in the lower end of described ram-air pipe.

5. Pi Tuoba flowmeter pressure head as claimed in claim 1, it is characterized in that, described total head pipe box and described ram-air pipe are coaxially arranged.

6. Pi Tuoba flowmeter pressure head as claimed in claim 1, it is characterized in that, described pressure head body upper end is provided with the plug plugged with described Pi Tuoba flowmeter its lower end, is welded and fixed after grafting.