Anti-deformation structure of pressure gauge movement

Abstract

The utility model discloses an anti-deformation structure of a pressure gauge movement, which belongs to the technical field of pressure gauges and comprises a pressure gauge body, the pressure gauge body is communicated with a connecting pipe, an input end of the pressure gauge body is provided with a movement input end, and the movement input end extends into the connecting pipe. The protection mechanism comprises a piston, a limiting block, a spring seat, a reset spring and a pressure adjusting assembly, the piston is connected into the connecting pipe in a sealed and sliding mode, and the limiting block and the spring seat are fixedly connected into the connecting pipe. One end, far away from the pressure gauge body, of the connecting pipe is communicated with an equipment port of which the pressure is to be measured, liquid pushes the piston under the hydraulic action, and the piston moves in the connecting pipe and extrudes the space in the stroke cavity, so that the pressure action is transmitted to the input end of the movement, the liquid is effectively prevented from being in direct contact with the input end of the movement, and liquid leakage is avoided; and the input end of the movement works to enable the pressure gauge body to display a pressure index.

Description

Technical Field

[0001] The utility model belongs to the technical field of pressure gauges, and in particular relates to an anti-deformation structure of a pressure gauge movement. Background Art

[0002] A pressure gauge is a device for detecting pressure. When the pressure gauge is working, the external pressure on the input end of the movement causes the movement to deform and move, thereby driving the pointer to move and display the pressure, which is convenient for observation. When the existing pressure gauge is in use, the movement input end is prone to damage during long-term use, causing some liquid to leak into the pressure gauge, which is easy to damage the internal structure of the pressure gauge and affect the normal use of the pressure gauge.

[0003] The patent with application number CN202223563320.7 discloses a waterproof structure for a pressure gauge movement. A piston is set so that the pressure medium pushes the piston to squeeze the air and transmits the pressure to the spring tube, i.e., the input end of the movement, to avoid leakage caused by contact between the pressure medium and the spring tube. In this way, the air between the piston and the spring tube is easily changed after being repeatedly compressed and cannot be effectively restored, which can easily affect the normal use of the pressure gauge. Utility Model Content

[0004] The utility model aims to provide a pressure gauge movement anti-deformation structure to solve the problem in the traditional technology that the air between the piston and the spring tube is easily changed after being repeatedly compressed and cannot be effectively restored, which easily affects the normal use of the pressure gauge.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A pressure gauge movement anti-deformation structure, comprising:

[0007] A pressure gauge body, wherein the pressure gauge body is connected to a connecting pipe, an input end of the pressure gauge body is provided with a movement input end, and the movement input end extends into the connecting pipe;

[0008] The protection mechanism includes a piston, a limit block, a spring seat, a return spring and a pressure regulating assembly. The piston is sealingly and slidingly connected in a connecting pipe. The limit block and the spring seat are fixedly connected in the connecting pipe. A plurality of return springs are fixedly connected between the piston and the spring seat. The piston abuts against the limit block on the side away from the return spring. A travel cavity is formed between the limit block, the spring seat and the connecting pipe. The pressure regulating assembly is connected to one end of the connecting pipe close to the pressure gauge body.

[0009] Preferably, the limit block and the spring seat are both annular, wherein the spring seat is located between the limit block and the pressure gauge body.

[0010] Preferably, the pressure regulating assembly comprises a pressure regulating pipe, a control valve and a pressure regulating valve, the pressure regulating pipe is connected to one end of the connecting pipe close to the pressure gauge body, and the pressure regulating pipe is provided with a control valve at one end close to the connecting pipe.

[0011] Preferably, a pressure regulating valve is installed at one end of the pressure regulating pipe away from the connecting pipe, wherein the pressure regulating valve is connected and cooperated with an output end of an external air pressure source.

[0012] Preferably, the protection mechanism also includes a limit assembly, the limit assembly includes a limit rod, a plurality of limit rods are fixedly connected between the limit block and the spring seat, a plurality of limit holes are opened on the piston, and the plurality of limit rods correspond to the plurality of limit holes in a one-to-one sealing and sliding fit.

[0013] Preferably, the plurality of return springs correspond one-to-one to the plurality of limit rods, and the gap is sleeved on the plurality of limit rods.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. In the utility model, a protective mechanism is provided to connect the end of the connecting pipe away from the pressure gauge body to the port of the device to be measured. Under the action of hydraulic pressure, the liquid pushes the piston, and the piston moves in the connecting pipe, squeezing the space in the stroke cavity, thereby transmitting the pressure effect to the input end of the movement, effectively preventing the liquid from directly contacting the input end of the movement and preventing liquid leakage. The operation of the input end of the movement causes the pressure gauge body to display the pressure index.

[0016] 2. In the utility model, a pressure regulating assembly is provided. After long-term use, in order to avoid changes in the air pressure in the stroke chamber, the control valve is opened, and the air pressure in the pressure regulating pipe and the stroke chamber is controlled by the output end of the external air pressure source and the pressure regulating valve to restore the initial air pressure, thereby ensuring the normal use of the pressure gauge body; at the same time, by changing the initial air pressure in the stroke chamber, the measuring range of the pressure gauge body can be increased, thereby improving the applicability of the pressure gauge body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a vertical cross-sectional structural schematic diagram of the utility model;

[0019] Figure 3 for Figure 2 Enlarged schematic diagram of part A in the middle.

[0020] In the figure: 1 pressure gauge body, 2 movement input end, 3 connecting pipe, 4 piston, 5 limit block, 6 spring seat, 7 return spring, 8 stroke chamber, 9 pressure regulating pipe, 10 control valve, 11 pressure regulating valve, 12 limit rod, 13 limit hole. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] Reference Figure 1-Figure 3 , a pressure gauge movement anti-deformation structure, comprising:

[0023] The pressure gauge body 1 is connected with a connecting pipe 3 , and an input end of the pressure gauge body 1 is provided with a movement input end 2 , and the movement input end 2 extends into the connecting pipe 3 .

[0024] The protection mechanism includes a piston 4, a limit block 5, a spring seat 6, a return spring 7 and a pressure regulating assembly. The piston 4 is sealingly and slidably connected in the connecting tube 3. The limit block 5 and the spring seat 6 are fixedly connected in the connecting tube 3. A plurality of return springs 7 are fixedly connected between the piston 4 and the spring seat 6. The side of the piston 4 away from the return spring 7 rests on the limit block 5, wherein the limit block 5, the spring seat 6 and the connecting tube 3 form a stroke cavity 8, and the pressure regulating assembly is connected to the connecting tube 3 at one end close to the pressure gauge body 1.

[0025] The limit block 5 and the spring seat 6 are both annular, wherein the spring seat 6 is located between the limit block 5 and the pressure gauge body 1 .

[0026] The pressure regulating assembly includes a pressure regulating pipe 9 , a control valve 10 and a pressure regulating valve 11 . The pressure regulating pipe 9 is connected to one end of the connecting pipe 3 close to the pressure gauge body 1 . The control valve 10 is installed on one end of the pressure regulating pipe 9 close to the connecting pipe 3 .

[0027] A pressure regulating valve 11 is installed at one end of the pressure regulating pipe 9 away from the connecting pipe 3, wherein the pressure regulating valve 11 is connected and coordinated with the output end of the external air pressure source.

[0028] The protection mechanism also includes a limit assembly, which includes a limit rod 12. A plurality of limit rods 12 are fixedly connected between the limit block 5 and the spring seat 6. A plurality of limit holes 13 are opened on the piston 4. The plurality of limit rods 12 and the plurality of limit holes 13 correspond to each other in a sealed and sliding manner.

[0029] The multiple return springs 7 correspond to the multiple limit rods 12 one by one, and the gaps are sleeved on the multiple limit rods 12 .

[0030] The operating principle of the utility model is now described as follows:

[0031] When working, the end of the connecting pipe 3 away from the pressure gauge body 1 is connected to the port of the device to be measured. Under the action of hydraulic pressure, the liquid pushes the piston 4, and the piston 4 moves in the connecting pipe 3, squeezing the space in the stroke chamber 8, thereby transmitting the pressure action to the movement input end 2, effectively avoiding direct contact between the liquid and the movement input end 2, and avoiding liquid leakage. The movement input end 2 works so that the pressure gauge body 1 displays the pressure index;

[0032] When the piston 4 moves, a plurality of limiting rods 12 are used to limit the piston 4, thereby effectively preventing the piston 4 from twisting during movement and improving the stability of the piston 4 during operation.

[0033] After long-term use, in order to avoid changes in the air pressure in the stroke chamber 8, the control valve 10 is opened, and the air pressure in the pressure regulating pipe 9 and the stroke chamber 8 is controlled to restore the initial air pressure through the external air pressure source output end and the pressure regulating valve 11, thereby ensuring the normal use of the pressure gauge body 1.

[0034] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pressure gauge movement anti-deformation structure, characterized in that: include: A pressure gauge body (1), the pressure gauge body (1) being connected to a connecting pipe (3), a movement input end (2) being provided at an input end of the pressure gauge body (1), the movement input end (2) extending into the connecting pipe (3); A protection mechanism, the protection mechanism comprising a piston (4), a limit block (5), a spring seat (6), a return spring (7) and a pressure regulating assembly, the piston (4) being sealingly slidably connected in a connecting pipe (3), the limit block (5) and the spring seat (6) being fixedly connected in the connecting pipe (3), a plurality of return springs (7) being fixedly connected between the piston (4) and the spring seat (6), the piston (4) abutting against the limit block (5) on a side away from the return spring (7), wherein a travel cavity (8) is enclosed between the limit block (5), the spring seat (6) and the connecting pipe (3), and the pressure regulating assembly being connected to an end of the connecting pipe (3) close to a pressure gauge body (1).

2. The pressure gauge movement anti-deformation structure according to claim 1, characterized in that: in: The limit block (5) and the spring seat (6) are both annular in shape, wherein the spring seat (6) is located between the limit block (5) and the pressure gauge body (1).

3. The anti-deformation structure of a pressure gauge movement according to claim 1, characterized in that: in: The pressure regulating assembly comprises a pressure regulating pipe (9), a control valve (10) and a pressure regulating valve (11); the pressure regulating pipe (9) is connected to an end of the connecting pipe (3) close to the pressure gauge body (1); and the control valve (10) is installed at an end of the pressure regulating pipe (9) close to the connecting pipe (3).

4. The pressure gauge movement anti-deformation structure according to claim 3, characterized in that: in: A pressure regulating valve (11) is installed at one end of the pressure regulating pipe (9) away from the connecting pipe (3), wherein the pressure regulating valve (11) is connected and cooperated with an output end of an external air pressure source.

5. The anti-deformation structure of a pressure gauge movement according to claim 1, characterized in that: in: The protection mechanism further comprises a limiting assembly, the limiting assembly comprising a limiting rod (12), a plurality of limiting rods (12) being fixedly connected between the limiting block (5) and the spring seat (6), a plurality of limiting holes (13) being formed on the piston (4), and the plurality of limiting rods (12) and the plurality of limiting holes (13) being sealingly and slidably matched one by one.

6. The anti-deformation structure of a pressure gauge movement according to claim 5, characterized in that: in: The plurality of return springs (7) correspond one-to-one to the plurality of limit rods (12), and the gaps are sleeved on the plurality of limit rods (12).

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