阅读说明：本技术 一种压力检测表 (Pressure detection meter ) 是由 练忠 于 2021-08-16 设计创作，主要内容包括：本发明提供了一种压力检测表,解决了当压力表内压力超过规定值易导致压力表损坏的问题。二号腔的直径小于一号腔且与波登管连通,一号腔从进液口到出液口依次设有堵头、一号活塞以及二号活塞,堵头设有流体通道,一号活塞与二号活塞的直径分别大于流体通道与二号腔的直径,一号活塞与二号活塞之间连接有弹性复位件,一号活塞、二号活塞的周向外壁与一号腔的腔壁之间设有间隙。当液体通过流体通道进入一号腔时,液体作用于一号活塞,部分锤击力被分解,一号活塞上升带动二号活塞封住二号腔,使液体的锤击力在腔体内快速稀释,当液体的压力达到与实际压力平衡后,液体再进入波登管,保护波登管不被损坏同时保证波登管内液体的流速稳定。(The invention provides a pressure detection meter, which solves the problem that when the pressure in a pressure gauge exceeds a specified value, the pressure gauge is easy to damage. The diameter of No. two chambeies is less than a chamber and communicates with Bourdon tube, and No. one chamber is equipped with end cap, a piston and No. two pistons from the inlet to the liquid outlet in proper order, and the end cap is equipped with fluid passage, and the diameter of a piston and No. two pistons is greater than the diameter in fluid passage and No. two chambers respectively, is connected with the elasticity piece that resets between a piston and No. two pistons, is equipped with the clearance between the circumference outer wall of a piston, No. two pistons and the chamber wall in a chamber. When liquid enters the first cavity through the fluid channel, the liquid acts on the first piston, part of hammering force is decomposed, the first piston rises to drive the second piston to seal the second cavity, the hammering force of the liquid is quickly diluted in the cavity, and when the pressure of the liquid is balanced with the actual pressure, the liquid enters the Bourdon tube again, so that the Bourdon tube is protected from being damaged, and meanwhile, the flow speed of the liquid in the Bourdon tube is guaranteed to be stable.)

1. The utility model provides a pressure detection table, includes joint (1) and bourdon tube (2), joint (1) is equipped with the feed liquor chamber with bourdon tube (2) intercommunication, its characterized in that: the feed liquor chamber is including a chamber (3) and No. two chamber (4) that communicate each other, the diameter in No. two chamber (4) is less than a chamber (3) and communicates with bourdon tube (2), No. one chamber (3) is equipped with end cap (5), a piston (6) and No. two piston (7) from the inlet to the liquid outlet in proper order, end cap (5) are equipped with fluid passage (8), the diameter of a piston (6) and No. two piston (7) is greater than the diameter of fluid passage (8) and No. two chamber (4) respectively, be connected with elasticity piece (9) that resets between a piston (6) and No. two piston (7), be equipped with the clearance between the circumference outer wall of a piston (6), No. two piston (7) and the chamber wall in a chamber (3).

2. A pressure sensing gauge as defined in claim 1, wherein: the first piston (6) and the second piston (7) are both provided with guide columns (10) matched with the elastic reset pieces (9).

3. A pressure sensing gauge as defined in claim 2, wherein: the other end of the guide post (10) is provided with a water inlet hole (11).

4. A pressure sensing gauge as defined in claim 1, wherein: and a through groove (12) is formed in one surface, far away from the elastic resetting piece (9), of the second piston (7).

5. A pressure sensing gauge as defined in claim 1, wherein: the elastic reset piece (9) is a spring.

Technical Field

The invention relates to the technical field of instruments, in particular to a pressure detection meter.

Background

The pressure gauge generally comprises a gauge shell, a gauge cover, a bourdon tube arranged in the gauge shell, a rotatable mandrel and a pressure deformation conversion mechanism connected between the bourdon tube and the mandrel; the Bourdon tube bends under the action of a medium, the Bourdon tube indirectly drives the mandrel to rotate, and the rotation angle of the mandrel represents the pressure of the pressure medium; the Bourdon tube is an elastic sensitive element, and the pressure is measured by means of bending change or torsional deformation of the Bourdon tube; the pressure bearing of the bourdon tube is limited, and due to the water hammer phenomenon, when a valve of the pressure gauge is opened, a medium with pressure in the pipeline enters the bourdon tube instantly, and the pressure in the bourdon tube exceeds the rated highest pressure easily due to strong impact pressure, so that the pressure gauge is easily damaged.

Disclosure of Invention

In order to overcome the defects of the background art, the invention provides a pressure detection meter, which solves the problem that the pressure meter is easy to damage when the pressure in the pressure meter exceeds a specified value.

The technical scheme adopted by the invention is as follows:

the utility model provides a pressure detection table, is including connecting and bourdon tube, the joint is equipped with the feed liquor chamber with bourdon tube intercommunication, the feed liquor chamber is including a chamber and No. two chambers of mutual intercommunication, the diameter in No. two chambers is less than a chamber and communicates with bourdon tube, a chamber is equipped with end cap, a piston and No. two pistons from the inlet to the liquid outlet in proper order, the end cap is equipped with fluid passage, the diameter of a piston and No. two pistons is greater than the diameter in fluid passage and No. two chambers respectively, be connected with the elasticity piece that resets between a piston and No. two pistons, be equipped with the clearance between the circumference outer wall in a piston, No. two pistons and the chamber wall in a chamber.

The first piston and the second piston are both provided with guide columns matched with the elastic reset pieces.

And the other end of the guide post is provided with a water inlet hole.

And a through groove is formed in one surface of the second piston, which is far away from the elastic reset piece.

The elastic reset piece is a spring.

The invention has the beneficial effects that:

when liquid enters the first cavity through the fluid channel, the liquid acts on the first piston, part of hammering force is decomposed, the first piston ascends to drive the second piston to seal the second cavity, the hammering force of the liquid is prevented from entering the Bourdon tube, the hammering force of the liquid is enabled to be quickly diluted in the cavity, when the pressure of the liquid is balanced with the actual pressure, the first piston and the second piston are balanced, the liquid enters the Bourdon tube again, the Bourdon tube is protected from being broken and losing efficacy, and meanwhile the flow speed of the liquid in the Bourdon tube is guaranteed to be stable.

Drawings

FIG. 1 is a schematic of the present invention.

Figure 2 is a schematic view of piston number two of the present invention.

The device comprises a connector 1, a Bourdon tube 2, a first cavity 3, a second cavity 4, a plug 5, a first piston 6, a second piston 7, a fluid channel 8, an elastic resetting piece 9, a guide post 10, a water inlet hole 11 and a through groove 12.

Detailed Description

The invention will be further illustrated with reference to the following examples and drawings:

in the embodiment, as shown in fig. 1, a pressure detection meter comprises a connector 1 and a bourdon tube 2, the connector 1 is provided with a liquid inlet cavity communicated with the bourdon tube 2, the liquid inlet cavity comprises a cavity 3 and a cavity 4 which are communicated with each other, the diameter of the cavity 4 is smaller than the cavity 3 and is communicated with the bourdon tube 2, the cavity 3 is sequentially provided with a plug 5, a piston 6 and a piston 7 from a liquid inlet to a liquid outlet, the plug 5 is provided with a fluid channel 8, the diameters of the piston 6 and the piston 7 are respectively larger than the diameters of the fluid channel 8 and the cavity 4, an elastic reset part 9 is connected between the piston 6 and the piston 7, and a gap is arranged between the circumferential outer wall of the piston 6 and the piston 7 and the cavity wall of the cavity 3. The weight of the liquid is seven hundred times of the weight of the air, and the liquid cannot be compressed; when liquid enters the first cavity 3 through the fluid channel, the liquid acts on the first piston 6, part of hammering force is decomposed, the first piston 6 ascends to drive the second piston 7 to seal the second cavity 4, the hammering force of the liquid is prevented from entering the Bourdon tube 2, the hammering force of the liquid is enabled to be quickly diluted in the first cavity 3, when the pressure of the liquid is balanced with the actual pressure, the first piston 5 and the second piston 7 are also balanced, the liquid enters the Bourdon tube 2 again, the Bourdon tube 2 is protected from being broken and failed, and meanwhile the flow speed of the liquid in the Bourdon tube 2 is guaranteed to be stable.

In the embodiment, as shown in fig. 1, the first piston 6 and the second piston 7 are both provided with a guide post 10 engaged with the elastic restoring member 9. The straightness that piston 6, piston 7 moved up and down is guaranteed, and piston 6, piston 7 can not take place to interfere with chamber 3 when moving.

In the embodiment, as shown in fig. 1, the other end of the guide post 10 is provided with a water inlet hole 11. The liquid enters the water inlet hole 11, so that the hammering force of the liquid can be more concentrated on the second piston 7, and a better sealing effect is achieved; of course, when the Bourdon tube 2 is decompressed, the hammering force of the liquid is concentrated on the first piston 6, and the liquid can flow out stably after being stabilized.

In the embodiment, as shown in fig. 1 and fig. 2, a through groove 12 is formed in a surface of the second piston 7 away from the elastic restoring member 9. After the second piston 7 seals the second cavity 4, the hammering force of the liquid is diluted in the first cavity 3, and after the pressure of the liquid is balanced with the actual pressure, the liquid can enter the through groove 12 to act on the top surface of the second piston 7, so that a certain gap is formed between the second piston 7 and the second cavity 4, and the liquid can conveniently enter the second cavity 4.

In an embodiment, the elastic return element 9 is a spring. The spring has good elastic reset capability and low price.

It should be understood that the above-described embodiments of the present invention are merely examples for illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. There is no need or no way to give poor examples of all embodiments. And such obvious changes and modifications which are within the spirit of the invention are deemed to be covered by the present invention.