A high-temperature protection type pressure gauge

Abstract

The present invention belongs to the technical field of pressure gauges, and specifically relates to a high-temperature protection type pressure gauge, which includes a case and a pipe joint. Inside the case, there are a bourdon tube, a pull rod, a sector gear, a dial, and a gear movement. A pipe joint is fixedly connected below the case, and a connector is fixed on the upper surface of the pipe joint. A bourdon tube is fixedly connected to one side of the connector. One end of the bourdon tube is hinged to a pull rod, and the other end of the pull rod is fixedly connected to a sector gear. One end of the sector gear meshes with a gear movement, and the gear movement is installed on the dial. A pointer is provided on the gear movement. A connecting pipe is provided below the pipe joint, and an installation box is provided in the middle of the connecting pipe. The installation box is provided with a partition board, and an adjusting component is provided in the middle of the partition board. A triggering component is provided on the other side of the partition board. A connecting frame is fixedly connected to one side of the triggering component, and the connecting frame is fixedly connected to the installation box. The lower end of the triggering component is connected to a power component. The technical effect of the present invention is to provide a high-temperature protection type pressure gauge that protects the pressure gauge by blocking high-temperature gas from entering the gauge body.

Description

Technical Field

[0001] The present invention relates to the technical field of instruments and meters, and particularly relates to a high-temperature protection pressure gauge. Background Art

[0002] A pressure gauge refers to an instrument that uses an elastic element as a sensitive element to measure and indicate a pressure higher than the ambient pressure. It is extremely widely used and almost covers all industrial processes and scientific research fields. It can be seen everywhere in fields such as thermal pipelines, oil and gas transmission, water supply and gas supply systems, vehicle repair and maintenance factories, etc. Especially in industrial process control and technical measurement processes, due to the high mechanical strength and convenient production of the elastic sensitive element of the mechanical pressure gauge, the mechanical pressure gauge has been more and more widely used.

[0003] The existing traditional pressure gauges on the market have the following problems when in use: If directly measuring the gas pressure exceeding the highest heat-resistant temperature, it will cause the internal structural components of the pressure gauge used for measurement to be easily melted, seriously affecting the service life of the pressure gauge, with a relatively high damage rate, affecting the data reference and tracking of the measured equipment, and there are also relatively large potential safety hazards.

[0004] Therefore, this application proposes a high-temperature protection pressure gauge. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art and solve the technical problems proposed in the background art.

[0006] The technical solution adopted by the present invention to solve its technical problems is: A high-temperature protection pressure gauge, including a case and a pipe joint. A bourdon tube, a pull rod, a sector gear, a dial and a gear movement are arranged inside the case. A pipe joint is fixedly connected below the case. A connector is fixed on the upper surface of the pipe joint. A bourdon tube is fixedly connected to one side of the connector. One end of the bourdon tube away from the connector is hinged with a pull rod. One end of the pull rod away from the bourdon tube is fixedly connected to a sector gear. One end of the sector gear meshes with the gear movement. The gear movement is installed on the dial. A pointer is provided on the gear movement. A connecting pipe is provided below the pipe joint. An installation box is provided in the middle of the connecting pipe. The installation box is provided with a partition board. An adjusting component is provided in the middle of the partition board. A triggering component is provided on the other side of the partition board. A connecting frame is fixedly connected to one side of the triggering component. The connecting frame is fixedly connected to the installation box. The lower end of the triggering component is connected to a power component.

[0007] In a preferred embodiment, the present invention can be further configured as follows: the adjusting component includes a fixed ring, a rotating ring, a connecting rod and a fan blade. A first limiting post is provided on the outer circumference of the fixing plate, and a second limiting post is provided on the inner circumference of the fixing plate. A limiting groove is formed on the rotating ring, and a first connecting post is provided on one side of the limiting groove. An installation groove is formed at one end of the fan blade, and a rotating shaft is provided at the other end of the fan blade. Through holes are formed on both sides of the connecting rod. The fixed ring is fixedly installed on the isolation plate, and the rotating ring is arranged above the fixed ring. The first limiting post is placed in the limiting groove, and the fixed ring is rotatably connected to the rotating ring. Gear teeth are provided on the outer side of the rotating ring. The fan blade is arranged above the fixing plate. The first connecting post is placed in the installation groove. The connecting rod is arranged above the fan blade. One end of the connecting rod is sleeved outside the rotating shaft, and the other end of the connecting rod is sleeved outside the first connecting post. A driven gear is meshed with one side of the rotating ring, and the driven gear is rotatably connected to the isolation plate. A central hole is formed in the middle of the driven gear, and threads are provided in the central hole. One end of the central hole is connected to one end of the triggering component, and threads matching the central hole are provided at one end of the triggering component passing through the central hole.

[0008] In a preferred embodiment, the present invention can be further configured as follows: the triggering component includes an installation shell, an outer sleeve bump, a lining rod, a limiting rod, a release limiting rod and a connecting rod. A first longitudinal groove is formed in the installation shell, a first transverse groove is provided on one side of the first longitudinal groove, the first longitudinal groove and the first transverse groove are vertically intersected, a second longitudinal groove is provided on one side of the first transverse groove, and the first transverse groove and the second longitudinal groove are vertically intersected. The outer sleeve bump is arranged in the first longitudinal groove, and a second spring is provided between the outer sleeve bump and the installation shell. The lining rod is sleeved inside the outer sleeve bump. One side of the outer sleeve bump is fixedly connected to the release limiting rod, and the release limiting rod is placed inside the second longitudinal groove and intersects with one end of the limiting rod. The limiting rod is arranged in the first transverse groove. A limiting ring is provided on the lining rod, and a first spring is provided between the outer sleeve bump and the limiting ring. A limiting protrusion is provided at one end of the limiting rod, and the inclined surface of the limiting protrusion is adapted to the limiting ring. A third spring is connected to the other end of the limiting rod, and the other end of the third spring is connected to the installation shell. The release limiting rod and the outer sleeve bump are connected to each other through the connecting rod. Threads are provided at the top of the lining rod. The lining rod passes through the isolation plate, and the driven gear is arranged on the outer periphery of the top of the lining rod.

[0009] In a preferred embodiment, the present invention can be further configured as follows: an inclined surface groove is formed in the middle of the limiting rod, and one end of the release limiting rod is adapted to the inclined surface groove.

[0010] In a preferred example, the present invention can be further configured such that a sealing ring is installed at the junction of the inner lining rod and the isolation plate.

[0011] In a preferred example, the present invention can be further configured such that a notch is provided on one side of the first transverse groove, a limiting shaft is provided in the notch, and the limiting shaft is connected to the limiting rod.

[0012] In a preferred example, the present invention can be further configured such that a dial rod is provided on the inner lining rod on one side of the limiting ring, sliding grooves are provided on both the mounting shell and the mounting box on one side of the inner lining rod, and the dial rod passes through the sliding groove and is located outside the surface.

[0013] In a preferred example, the present invention can be further configured such that an upper mounting frame is fixedly connected below the encapsulation container, a plurality of card slots are provided at one end of the upper mounting frame, a heat insulation frame is provided below the card slots, the heat insulation frame is snap-connected in the upper mounting frame, a lower mounting frame is snap-connected below the heat insulation frame, and the lower mounting frame is fixedly connected to the mounting box.

[0014] In a preferred example, the present invention can be further configured such that the encapsulation container is made of a high-temperature resistant and corrosion-resistant material.

[0015] Compared with the prior art, the present application has the following beneficial effects:

[0016] 1. The present application is provided with an adjustment component. When the temperature of the measured gas exceeds the warning line of the pressure gauge, the adjustment component closes, truncates the intake passage to prevent the measured gas from continuing to pour into the pressure gauge body, avoids damage to the internal structural components of the pressure gauge caused by high heat, prolongs the service life of the pressure gauge, and reduces the damage rate.

[0017] 2. The present application has a high-temperature protection function, avoiding the problem of loss of accuracy of instruments and meters caused by high temperature.

[0018] 3. The present application is provided with a power component, which monitors the temperature of the gas in the pipe in real time through the power component. When the temperature exceeds the warning value, the trigger component starts, driving the adjustment component to open and close.

[0019] 4. The present application realizes the opening and closing of the adjustment component of the protective cover through a pure mechanical mechanism, with high reliability. There are almost no electronic components used in the adjustment component, the trigger component, and the power component, which can reduce the probability of failures such as damage to electronic components, and at the same time reduce the maintenance cost and difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 : Schematic diagram of the overall structure of the pressure gauge;

[0022] Figure 2: Overall side view of the pressure gauge;

[0023] Figure 3 : First overall sectional view of the pressure gauge;

[0024] Figure 4 : Second overall sectional view of the pressure gauge;

[0025] Figure 5 : Schematic diagram of the adjustment component structure of the pressure gauge;

[0026] Figure 6 : Side view of the adjustment component of the pressure gauge;

[0027] Figure 7 : Schematic diagram of the structure of the fixing ring of the pressure gauge;

[0028] Figure 8 : Schematic diagram of the structure of the trigger component of the pressure gauge;

[0029] Figure 9 : Sectional view of the trigger component of the pressure gauge;

[0030] Figure 10 : Schematic diagram of the structure of the trigger component (excluding the mounting shell) of the pressure gauge;

[0031] Figure 11 : Sectional view of the mounting shell of the pressure gauge;

[0032] Figure 12 : Schematic diagram of the structure of the power component of the pressure gauge;

[0033] Figure 13 : Schematic diagram of the structure of the slideway of the pressure gauge;

[0034] Figure 14 : Schematic diagram of the structure of the limit shaft of the pressure gauge;

[0035] Figure 15 : Schematic diagram of the structure of the sealing ring of the pressure gauge;

[0036] Figure 16 : Schematic diagram of the structure of the dial rod of the pressure gauge;

[0037] Figure 17 : Schematic diagram of the structure of the upper mounting bracket of the pressure gauge.

[0038] Reference Numerals: 1, watch case; 11, bourdon tube; 12, pull rod; 13, sector gear; 14, dial; 15, gear movement; 16, pointer; 2, pipe joint; 3, connector; 4, connecting pipe; 5, mounting box; 51, partition board; 511, sealing ring; 52, adjusting assembly; 521, fixing ring; 5211, first limiting post; 5212, second limiting post; 522, rotating ring; 5221, limiting groove; 5222, first connecting post; 523, connecting rod; 5231, through hole; 524, fan blade; 525, driven gear; 5251, central hole; 5241, mounting groove; 5242, rotating shaft; 53, triggering assembly; 531, mounting shell; 5311, first longitudinal groove; 5312, first transverse groove; 5313, second longitudinal groove; 5314, notch; 5315, limiting shaft; 532, outer convex block; 5321, spring II; 533, inner lining rod; 5331, limiting ring; 5332, spring I; 5333, lever; 534, limiting rod; 5341, limiting protrusion; 5342, spring III; 5343, inclined surface groove; 535, unlocking limiting rod; 536, connecting rod; 54, connecting frame; 55, power assembly; 551, encapsulation container; 5511, upper mounting frame; 5512, clamping groove; 5513, heat insulation frame; 5514, lower mounting frame; 552, paraffin; 553; slideway; 554, piston rod; 555, piston; 556, piston sealing ring. Detailed Description of the Invention

[0039] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The function of the accompanying drawings is to supplement the description of the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be construed as a limitation on the protection scope of the present invention.

[0040] The following will Figure 1-17 further elaborate on the present invention in detail.

[0041] Refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4, in the description of the present invention, the present invention provides a high-temperature protection type pressure gauge, which includes a case 1 and a pipe joint 2. A bourdon tube 11, a pull rod 12, a sector gear 13, a dial 14 and a gear movement 15 are arranged inside the case 1. A pipe joint 2 is fixedly connected below the case 1. A connector 3 is fixed on the upper surface of the pipe joint 2. One side of the connector 3 is fixedly connected with a bourdon tube 11. One end of the bourdon tube 11 away from the connector 3 is hinged with a pull rod 12. One end of the pull rod 12 away from the bourdon tube 11 is fixedly connected with a sector gear 13. One end of the sector gear 13 is meshed with the gear movement 15. The gear movement 15 is installed on the dial 14. A pointer 16 is arranged on the gear movement 15. A connecting pipe 4 is arranged below the pipe joint 2. An installation box 5 is arranged in the middle of the connecting pipe 4. The installation box 5 is provided with a partition plate 51. A regulating component 52 is arranged in the middle of the partition plate 51. A trigger component 53 is arranged on the other side of the partition plate 51. One side of the trigger component 53 is fixedly connected with a connecting frame 54. The connecting frame 54 is fixedly connected with the installation box 5. The lower end of the trigger component 53 is connected with a power component 55.

[0042] One end of the bourdon tube 11 is fixed on the connector 3, and the other end can move. When the measured fluid enters the pressure gauge, the bourdon tube 11 is stretched. The pull rod 12 will transmit the deformation torque to the sector gear 13. The sector gear 13 is meshed with the gear movement 15. The rotation of the sector gear 13 drives the pointer 16 connected to the central shaft of the gear movement 15, so as to display the pressure value. The bourdon tube 11 converts the elastic deformation into a rotational motion, causing the pointer 16 to deflect to display the pressure. The degree of deformation of the bourdon tube 11 is proportional to the magnitude of the pressure. The other end of the gear movement 15 is connected with a spiral spring. When the gear movement 15 rotates, the spiral spring contracts and stores the energy. When the detection stops, the connected spiral spring will release the previously stored energy and rotate in the opposite direction until it returns to the original position. The present invention monitors the temperature of the gas in the pipe in real time through the power component 55. When the temperature exceeds the warning value, the trigger component 53 is activated, driving the regulating component 52 to close the pipeline, thereby playing a protective role for the pressure gauge. The partition plate 51 and the upper half of the installation box 5 form a sealed space as a gas buffer zone. The upper and lower ends of the sealed space are respectively connected with the pipeline.

[0043] Refer to Figure 4 , Figure 5 , Figure 6 and Figure 7, the adjustment component 52 includes a fixed ring 521, a rotating ring 522, a connecting rod 523 and a fan blade 524. A first limiting post 5211 is provided on the outer circumference of the fixed plate 521, and a second limiting post 5212 is provided on the inner circumference of the fixed plate 521. A limiting groove 5221 is formed on the rotating ring 522, and a first connecting post 5222 is provided on one side of the limiting groove 5221. An installation groove 5241 is formed at one end of the fan blade 524, and a rotating shaft 5242 is provided at the other end of the fan blade 521. Through holes 5231 are formed on both sides of the connecting rod 523. The fixed ring 521 is fixedly installed on the partition plate 51. A rotating ring 522 is provided above the fixed ring 521. The first limiting post 5211 is placed in the limiting groove 5221. The fixed ring 521 is rotatably connected to the rotating ring 522. Gear teeth are provided on the outer side of the rotating ring 522. The fan blade 524 is provided above the fixed plate 521. The first connecting post 5212 is placed in the installation groove 5241. The connecting rod 523 is provided above the fan blade 524. One end of the connecting rod 523 is sleeved outside the rotating shaft 5242, and the other end of the connecting rod 523 is sleeved outside the first connecting post 5222. A driven gear 525 is engaged with one side of the rotating ring 522. The driven gear 525 is rotatably connected to the partition plate 51. A central hole 5251 is formed in the middle of the driven gear 525. Threads are provided in the central hole 5251. One end of the central hole 5251 is connected to one end of the trigger component 53. One end of the trigger component 53 passing through the central hole 5251 is provided with threads matching the central hole 5251.

[0044] The central hole is provided with a machined internal thread, and the internal thread can form a screw pair with one end of the trigger component 53. Since the driven gear 52 intersects with the partition plate 51, the driven gear 52 cannot move up and down. The lifting of the trigger component 53 can drive the rotation of the driven gear 52. The driven gear 52 drives the rotating ring 522 engaged with it to rotate. The rotating ring 522 drives the connecting rod 523 to move. The connecting rod 523 pulls the fan blade 524 to rotate around the rotating shaft 5242, realizing the opening and closing of the air intake pipe.

[0045] Refer to Figure 8 , Figure 9 , Figure 10 and Figure 11, the trigger assembly 53 includes a mounting shell 531, an outer sleeve bump 532, an inner lining rod 533, a limiting rod 534, a limit release rod 535 and a connecting rod 536. A first longitudinal groove 5311 is formed in the mounting shell 531. A first transverse groove 5312 is provided on one side of the first longitudinal groove 5311. The first longitudinal groove 5311 and the first transverse groove 5312 intersect perpendicularly. A second longitudinal groove 5313 is provided on one side of the first transverse groove 5312. The first transverse groove 5312 and the second longitudinal groove 5313 intersect perpendicularly. The outer sleeve bump 532 is arranged in the first longitudinal groove 5311. A second spring 5321 is provided between the outer sleeve bump 532 and the mounting shell 531. The inner lining rod 533 is sleeved inside the outer sleeve bump 532. A limit release rod 535 is fixedly connected to one side of the outer sleeve bump 532. The limit release rod 535 is placed inside the second longitudinal groove 5313 and intersects with the limiting rod 534 at one end. The limiting rod 534 is placed inside the first transverse groove 5312. A limiting ring 5331 is provided on the inner lining rod 533. A first spring 5332 is provided between the outer sleeve bump 532 and the limiting ring 5331. A limiting protrusion 5341 is provided at one end of the limiting rod 534. The inclined surface of the limiting protrusion 5341 is adapted to the limiting ring 5331. A third spring 5342 is connected to the other end of the limiting rod 534. The other end of the third spring 5342 is connected to the mounting shell 531. The limit release rod 535 and the outer sleeve bump 532 are connected to each other through the connecting rod 536. The top of the inner lining rod 533 has a thread. The inner lining rod 533 passes through the isolation plate 51. The driven gear 525 is provided on the outer periphery of the top of the inner lining rod 533.

[0046] When the temperature of the measured gas gradually increases, the power component 55 detects the change in temperature, thereby pushing the outer sleeve bump 532 towards the adjusting component 52. The spring two 5321 outside the outer sleeve bump 532 is stressed and deformed by extrusion. At the same time, the inner lining rod 533 slides within the outer sleeve bump 532, and the outer sleeve bump 532 continuously approaches the adjusting component 52. Since the limiting rod 534 intersects with the limiting ring 5331, the upward movement of the inner lining rod 533 is blocked, and the spring one 5332 is continuously compressed and deformed to accumulate elastic potential energy. The release limiting rod 535 moves together with the outer sleeve bump 532. A bevel groove 5343 is provided in the middle of the limiting rod 534, and the release limiting rod 535 is in contact with the bevel groove 5343, thereby continuously pushing the limiting rod 534 to move towards the side away from the limiting ring 5331. When the temperature reaches the warning value, the limiting rod 534 is separated from the limiting ring 5331, and the restriction of the limiting rod 534 on the inner lining rod 533 is released. The spring one 5332 returns to its original state and releases the accumulated elastic potential energy, pushing the limiting ring 5331. The limiting ring 5331 drives the inner lining rod 533 to move towards the top, and the movement of the inner lining rod 533 drives the driven gear 52 to rotate. The driven gear 52 provides power for the opening and closing of the fan blade 524, and the fan blade closes to cut off the intake pipe, thereby protecting the components inside the meter.

[0047] Refer to Figure 9 A bevel groove 5343 is provided in the middle of the limiting rod 534, and one end of the release limiting rod 535 is adapted to the bevel groove 5343. The release limiting rod 535 realizes the displacement of the limiting rod 534 through the bevel groove 5343.

[0048] Refer to Figure 15 A sealing ring 511 is installed at the joint of the inner lining rod 533 and the isolation plate 51. The sealing ring increases the airtightness and ensures the normal operation of the pressure gauge.

[0049] Refer to Figure 12 and Figure 13 The power component 55 includes a packaging container 551, paraffin 552, and a slideway 553. The packaging container 551 is attached to the circumference of the intake passage. The joint surface of the packaging container 551 and the intake pipe is made of a heat-conducting material. The packaging container 551 is filled with paraffin 552. A slideway 553 is provided on the packaging container 551. A piston rod 554 is provided in the slideway 553. The piston rod 554 is connected to the inner lining rod 533. A piston 555 is provided at one end of the piston rod 554. The piston rod 554 is slidably connected to the slideway 553. A piston seal ring 556 is sleeved around the piston 555.

[0050] The joint surface of the encapsulation container 551 and the intake pipe is made of a heat-conducting material, which can transfer temperature faster and detect temperature changes. The inside of the encapsulation container 551 is filled with paraffin 552. When the temperature of the measured gas rises, the paraffin begins to melt and expand. Under the action of the expansion tension, the piston 555 will be pushed upward, and the piston rod 554 will move together with the piston 555. The piston rod 554 drives the outer sleeve convex block 532 to move upward, thereby activating the trigger assembly 53 and the adjustment assembly 52.

[0051] Refer to Figure 14 , a notch 5314 is provided on one side of the first transverse groove 5312, and a limit shaft 5315 is provided in the notch 5314. The limit shaft 5315 is connected to the limit rod 534.

[0052] The movement of the limit shaft 5315 in the notch 5314 limits the movement range of the limit rod 534.

[0053] Refer to Figure 16 , a dial rod 5333 is provided on the inner lining rod 533 on one side of the limit ring 5331. Sliding grooves are provided on both the mounting shell 531 and the mounting box 5 on one side of the inner lining rod 533. The dial rod 5333 passes through the sliding groove and is outside the table.

[0054] After the temperature returns to normal, the second spring 5321 returns to its original shape, pushing the outer sleeve convex block 532 downward. The outer sleeve convex block 532 drives the unlocking limit rod 535 downward. The unlocking limit rod 535 separates from the limit rod 534. The third spring 5342 pushes the limit rod 534 to reset. At this time, pulling the dial rod 5333 downward, the dial rod 5333 drives the inner lining rod 533 downward until the limit ring 5331 moves below the limit rod 534. At this time, the limit rod 534 plays a limiting role on the inner lining rod 533, and the fan blade 524 is reopened, and the gas can flow from the pipeline into the meter body.

[0055] Refer to Figure 17 , a upper mounting frame 5511 is fixedly connected below the encapsulation container 551. A plurality of card slots 5512 are provided at one end of the upper mounting frame 5511. An insulating frame 5513 is provided below the card slots 5512. The insulating frame 5513 is clamped in the upper mounting frame 5511. A lower mounting frame 5514 is clamped below the insulating frame 5513. The lower mounting frame 5514 is fixedly connected to the mounting box 5.

[0056] The insulating frame 5513 is made of an insulating material. The insulating frame 5513 is arranged at the connection of the upper mounting frame 5511 and the lower mounting frame 5514 to avoid the installation box 5 from heating up due to heat conduction and ensure the safety of the operator.

[0057] There can be multiple insulating frames 5513, upper mounting frames 5511 and lower mounting frames 5514, which play a role in supporting and heat insulation.

[0058] Refer to Figure 12 The encapsulation container 551 is made of a high-temperature and corrosion-resistant material. The high-temperature and corrosion-resistant material extends the service life of the encapsulation container 551.

[0059] Working principle: When the temperature of the gas to be measured gradually increases, the bonding surface between the encapsulation container 551 and the intake pipe detects the temperature change. The encapsulation container 551 is filled with paraffin 552. When the temperature of the gas to be measured rises, the paraffin starts to melt and expand. Under the action of the expansion tension, it will push the piston 555 upward. The piston rod 554 moves upward together with the piston 555. The piston rod 554 drives the outer sleeve convex block 532 to move upward.

[0060] The outer sleeve convex block 532 moves towards the adjusting component 52. The spring two 5321 on the outside of the outer sleeve convex block 532 is stressed and squeezed to generate deformation. At the same time, the inner lining rod 533 slides inside the outer sleeve convex block 532. The outer sleeve convex block 532 continuously approaches the adjusting component 52. Since the limiting rod 534 intersects with the limiting ring 5331, the upward movement of the inner lining rod 533 is blocked. The spring one 5332 is continuously compressed to generate deformation and accumulate elastic potential energy. The release limiting rod 535 moves together with the outer sleeve convex block 532. A bevel groove 5343 is provided in the middle of the limiting rod 534. The release limiting rod 535 contacts with the bevel groove 5343, thereby continuously pushing the limiting rod 534 to move towards the side away from the limiting ring 5331. When the temperature reaches the warning value, the limiting rod 534 is separated from the limiting ring 5331. The restriction of the limiting rod 534 on the inner lining rod 533 is released. The spring one 5332 returns to its original state and releases the accumulated elastic potential energy, pushing the limiting ring 5331. The limiting ring 5331 drives the inner lining rod 533 to move towards the top. The movement of the inner lining rod 533 drives the driven gear 52 to rotate. The driven gear 52 drives the rotating ring 522 meshing with it to rotate. The rotating ring 522 drives the connecting rod 523 to move. The connecting rod 523 pulls the fan blade 524 to rotate around the rotating shaft 5242. The fan blades close to cut off the intake pipe, thus protecting the components inside the meter.

[0061] When the temperature of the gas to be measured returns to normal, pull down the lever 5333. The lever 5333 drives the inner lining rod 533 to move downward until the limiting ring 5331 moves below the limiting rod 534. At this time, the limiting rod 534 plays a limiting role on the inner lining rod 533. The downward movement of the inner lining rod 533 drives the driven wheel 52 to rotate. The fan blade 524 reopens, and the gas can flow into the meter body from the pipeline.

[0062] The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and various changes and improvements described in the above embodiments and the specification all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A high temperature protection pressure gauge, characterized in that: The watch case (1) comprises a watch case (1) and a pipe joint (2), wherein a spring tube (11), a pull rod (12), a sector gear (13), a dial (14) and a gear movement (15) are arranged in the watch case (1), the pipe joint (2) is fixedly connected to the lower part of the watch case (1), a connector (3) is fixedly connected to the upper surface of the pipe joint (2), a spring tube (11) is fixedly connected to one side of the connector (3), a pull rod (12) is hingedly connected to one end of the spring tube (11) away from the connector (3), a sector gear (13) is fixedly connected to one end of the pull rod (12) away from the spring tube (11), and one end of the sector gear (13) is meshed with the gear movement (15). ), the gear movement (15) is mounted on the dial (14), a pointer (16) is provided on the gear movement (15), a connecting pipe (4) is provided below the pipe joint (2), a mounting box (5) is provided in the middle of the connecting pipe (4), an isolation plate (51) is provided in the mounting box (5), an adjustment component (52) is provided in the middle of the isolation plate (51), a trigger component (53) is provided on one side of the isolation plate (51), a connecting frame (54) is fixedly connected to one side of the trigger component (53), the connecting frame (54) is fixedly connected to the mounting box (5), and a power component (55) is connected to the lower end of the trigger component (53);The adjustment assembly (52) comprises a fixed ring (521), a rotating ring (522), a connecting rod (523) and a fan blade (524); a first limiting column (5211) is provided on the outer circumference of the fixed ring (521); a second limiting column (5212) is provided on the inner circumference of the fixed ring (521); a limiting groove (5221) is provided on the rotating ring (522); a first connecting column (5222) is provided on one side of the limiting groove (5221); a mounting groove (5241) is provided on one end of the fan blade (524); a rotating shaft (5242) is provided on the other end of the fan blade (524); through holes (5231) are provided on both sides of the connecting rod (523); the fixed ring (521) is fixedly mounted on the isolation plate (51); a rotating ring (522) is provided above the fixed ring (521); The first limiting column (5211) is placed in the limiting groove (5221), the fixed ring (521) is rotatably connected to the rotating ring (522), the outer side of the rotating ring (522) is provided with gear teeth, the fan blade (524) is provided above the fixed ring (521), the first connecting column (5212) is placed in the installation groove (5241), the connecting rod (523) is provided above the fan blade (524), one end of the connecting rod (523) is sleeved on the outer side of the rotating shaft (5242), and the other end of the connecting rod (523) is sleeved on the outer side of the rotating shaft (5242). Sleeved on the outside of the first connecting column (5222), one side of the rotating ring (522) is meshed with a driven gear (525), the driven gear (525) is rotatably connected to the isolation plate (51), a center hole (5251) is opened in the middle of the driven gear (525), a thread is provided in the center hole (5251), the center hole (5251) is connected to one end of the trigger component (53), and one end of the trigger component (53) passing through the center hole (5251) is provided with a thread matching the center hole (5251);The trigger assembly (53) comprises a mounting shell (531), an outer shell protrusion (532), an inner lining rod (533), a limit rod (534), a limit release rod (535) and a connecting rod (536); a first longitudinal groove (5311) is provided in the mounting shell (531); a first transverse groove (5312) is provided on one side of the first longitudinal groove (5311); the first longitudinal groove (5311) and the first transverse groove (5312) intersect vertically; a second longitudinal groove (5313) is provided on one side of the first transverse groove (5312); and the first transverse groove (5312) is provided with a second longitudinal groove (5313). The outer sleeve protrusion (532) is provided in the first longitudinal groove (5311), and a spring (5321) is provided between the outer sleeve protrusion (532) and the mounting shell (531). The inner sleeve rod (533) is sleeved in the outer sleeve protrusion (532), and a release limit rod (535) is provided on one side of the outer sleeve protrusion (532). The release limit rod (535) is placed in the second longitudinal groove (5313), and one end of the release limit rod (535) intersects with the limit rod (534). (534) is placed in the first transverse groove (5312), a limiting ring (5331) is provided on the lining rod (533), a spring one (5332) is provided between the outer sleeve protrusion (532) and the limiting ring (5331), a limiting protrusion (5341) is provided at one end of the limiting rod (534), the inclined surface of the limiting protrusion (5341) is adapted to the limiting ring (5331), the other end of the limiting rod (534) is connected to a spring three (5342), the other end of the spring three (5342) is connected to the mounting shell (531), the release The limiting rod (535) and the outer sleeve protrusion (532) are connected to each other via a connecting rod (536); a thread is provided on the top of the lining rod (533); the lining rod (533) passes through the isolation plate (51); and the top of the lining rod (533) is placed in the center hole (5251); a bevel groove (5343) is provided in the middle of the limiting rod (534); one end of the limiting release rod (535) is matched with the bevel groove (5343); and a sealing ring (511) is installed at the junction of the lining rod (533) and the isolation plate (51);The power assembly (55) comprises a packaging container (551), paraffin (552) and a slideway (553); the packaging container (551) is attached to the circumference of the air intake duct; the attaching surface between the packaging container (551) and the air intake duct is made of heat-conducting material; the packaging container (551) is filled with paraffin (552); a slideway (553) is provided on the packaging container (551); a piston rod (554) is provided in the slideway (553); the piston rod (554) is connected to the liner rod (533); a piston (555) is provided at one end of the piston rod (554); the piston rod (554) is slidably connected to the slideway (553); a piston sealing ring (556) is sleeved around the piston (555). ; 2. A high temperature protection type pressure gauge according to claim 1, characterized in that: A notch (5314) is provided on one side of the first transverse groove (5312), a limiting shaft (5315) is provided in the notch (5314), and the limiting shaft (5315) is connected to the limiting rod (534).

3. A high temperature protection type pressure gauge according to claim 2, characterized in that: A lever (5333) is provided on the inner lining rod (533) on one side of the limiting ring (5331), and a sliding groove is provided on the mounting shell (531) and the mounting box (5) on one side of the inner lining rod (533), and the lever (5333) passes through the sliding groove and is placed outside the surface.

4. A high temperature protection type pressure gauge according to claim 3, characterized in that: An upper mounting frame (5511) is fixedly connected below the packaging container (551); a plurality of slots (5512) are provided at one end of the upper mounting frame (5511); a heat insulating frame (5513) is provided below the slots (5512); the heat insulating frame (5513) is snap-fitted into the upper mounting frame (5511); a lower mounting frame (5514) is snap-fitted below the heat insulating frame (5513); and the lower mounting frame (5514) is fixedly connected to the mounting box (5).

5. A high temperature protection type pressure gauge according to claim 4, characterized in that: The packaging container (551) is made of a high temperature resistant and corrosion resistant material.

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