An explosion-proof pressure gauge

Abstract

The present invention belongs to the technical field of pressure gauges, and specifically provides an explosion-proof pressure gauge, including a pressure gauge body and a connecting pipe, the pressure gauge body is fixedly connected to the connecting pipe, a base is provided below the pressure gauge body, the connecting pipe passes through the base and is fixedly connected to the base, a mounting frame is provided in the middle of the base, a rotating shaft is provided in the mounting frame, the rotating shaft is relatively arranged and rotatably connected to the mounting frame, a protective cover is fixedly connected to the rotating shaft, the protective cover can wrap the pressure gauge body therein, a clamping claw assembly is provided on the protective cover, an ejection mechanism is provided on both sides of the mounting frame, the ejection mechanism is arranged inside the base, a knob switch is provided on the side surface of the base, a cut-off assembly is connected to one side of the knob switch, a slide groove is provided on the side surface of the base, an ejection button is provided at the bottom of the base, and the ejection button is connected to the ejection mechanism. The technical effect of the present invention is: providing an explosion-proof pressure gauge, and ensuring the safety of the pressure gauge by providing a protective cover.

Description

Technical Field

[0001] The invention relates to the technical field of instruments and meters, and in particular to an explosion-proof pressure gauge. Background Art

[0002] A pressure gauge is an instrument that uses an elastic element as a sensitive element to measure and indicate pressure higher than the ambient pressure. It is extremely common and is found in almost all industrial processes and scientific research fields. It can be found everywhere in thermal pipelines, oil and gas transmission, water and gas supply systems, vehicle repair and maintenance shops, etc. Especially in the process of industrial process control and technical measurement, mechanical pressure gauges are increasingly widely used because their elastic sensitive elements have high mechanical strength and are easy to produce.

[0003] The traditional pressure gauges currently on the market have the following problems when in use: Traditional pressure gauges usually do not have explosion-proof functions when in use. When the pressure on the pressure gauge exceeds the maximum value of the pressure gauge, it is easy to explode. The explosion has strong energy and can easily cause harm to the user and affect the user's personal safety. Summary of the invention

[0004] In order to make up for the deficiencies of the prior art and solve the technical problems raised in the background technology.

[0005] The technical solution adopted by the present invention to solve its technical problems is: an explosion-proof pressure gauge, comprising a pressure gauge body and a connecting pipe, the pressure gauge body is fixedly connected to the connecting pipe, a base is provided below the pressure gauge body, the connecting pipe passes through the base and is fixedly connected to the base, a mounting frame is provided in the middle of the base, a first rotating shaft and a second rotating shaft are provided in the mounting frame, the first rotating shaft and the second rotating shaft are arranged opposite to each other and are rotatably connected to the mounting frame, the first rotating shaft is fixedly connected to a left protective cover, the second rotating shaft is fixedly connected to a right protective cover, the left protective cover and the right protective cover can wrap the pressure gauge body therein, the left protective cover and the right protective cover are provided with a clamping claw assembly, ejection mechanisms are provided on both sides of the mounting frame, the ejection mechanisms are arranged inside the base, a knob switch is provided on the side surface of the base, a cut-off assembly is connected to one side of the knob switch, a slide groove is provided on the side surface of the base, an ejection button is provided at the bottom of the base, and the ejection button is connected to the ejection mechanism.

[0006] In a preferred example, the present invention can be further configured as follows: the ejection mechanism includes a force storage component and a starting component, the force storage component includes a accommodating chamber, a sealing plug, an ejection rod, a hook claw, a limit block, a fixed seat and a lever, the accommodating chamber is arranged inside the base, the opening end of the accommodating chamber is arranged on the outer surface of the base, the sealing plug is placed in the accommodating chamber, the ejection rod is fixedly connected to the sealing plug below, the ejection rod passes through the bottom of the accommodating chamber, a spring is connected between the sealing plug and the accommodating chamber, one end of the ejection rod is connected to the hook claw, one side of the hook claw is an inclined surface, the limit block is arranged on one side of the hook claw, a clamping groove is provided on one side of the limit block, and the upper and lower sides of the clamping groove are both inclined surfaces, the fixed seat is fixedly connected to the base, a spring is arranged between the fixed seat and the limit block, the base is provided with a guide rail, the limit block is slidably connected to the base through the guide rail, a lever is arranged between the ejection rod and the hook claw, and one end of the lever passes through the slide groove and is placed on the outside of the base.

[0007] In a preferred example, the present invention can be further configured as follows: an air duct is opened on the inner wall of the accommodating bin, the air duct is located at one end of the bottom of the accommodating bin and is open, a spring sheet is provided on the inner wall of the accommodating bin at the other end of the air duct, a positioning connecting rod is provided along the inner diameter of the accommodating bin, and a positioning cap is provided in the middle of the positioning connecting rod.

[0008] In a preferred example, the present invention can be further configured as follows: the starting component includes a transmission block, a first gear, a second gear, a rack, a moving block, a mounting frame and a pushing rod, the ejection button is fixedly connected to the transmission block, a spring is connected between the transmission block and the base, the transmission block is slidably connected to the base, gear teeth are provided on both sides of the transmission block, the first gear is meshed on one side of the transmission block, the second gear is meshed on one side of the first gear, the rack is meshed under the second gear, the moving block is fixedly connected on one side of the rack, a pushing rod is fixedly connected to the moving block, the mounting frame is fixedly connected to the base, the moving block is slidably connected to the mounting frame, the first gear and the second gear are connected to the base via a rotating shaft, and a spring is provided between the moving block and the fixed seat.

[0009] In a preferred example, the present invention can be further configured as follows: the clamping jaw assembly includes a sealing connecting rod, a plug body, a fixed block, a clamping jaw, a limiting rod and a blocking plate; the sealing connecting rod is hinged with the protective cover; the plug body is fixedly connected to the middle part of the sealing connecting rod; one end of the sealing connecting rod is fixedly connected to the fixed block; the clamping jaw is provided on the fixed block; the clamping jaw is rotatably connected to the fixed block; two blocking plates are provided in the middle part of the fixed block; the blocking plate is provided with a through hole; the limiting rod passes through the through hole; one end of the limiting rod is in contact with the clamping jaw; and the other end of the limiting rod is fixedly connected to a spring.

[0010] In a preferred example, the present invention can be further configured as follows: one end of the sealing connecting rod is spherical, and the other end is cylindrical, and both ends are larger than the diameter of the through hole.

[0011] In a preferred example, the present invention can be further configured as follows: the truncation component includes an inner ring, an outer ring, blades, a limiting groove, a limiting shaft, a blade connecting rod and an outer shell, the outer shell is arranged inside the base and fixedly connected to the connecting pipe, the inner ring is fixedly connected to the middle part of the outer shell, the hollow part of the inner ring is the air inlet channel of the connecting pipe, the outer side of the inner ring is sleeved with an outer ring, the outer ring is slidably connected to the inner ring, limiting grooves are equidistantly provided on the outer ring, the outer ring is arranged in the outer shell, a limiting shaft is provided on the outer shell, and the limiting shaft is placed in the limiting groove, one end of the blade is hinged to the inner ring, the other end of the blade is hinged to the blade connecting rod, one end of the blade connecting rod is hinged to the outer ring, gear teeth are provided on the outer side of the outer ring, a driving wheel is provided on one side of the outer ring, and the driving wheel is meshed with the outer ring.

[0012] In a preferred example, the present invention can be further configured as follows: a rotating shaft 1 is provided on one side of the knob switch, a side bevel gear 1 is provided on the rotating shaft, a side bevel gear 2 is meshed with one side of the side bevel gear 1, the side bevel gear 2 is sleeved on the rotating shaft 2, and the driving wheel is fixedly connected to the rotating shaft 2.

[0013] In a preferred example, the present invention can be further configured as follows: a plurality of slots are provided on the left protective cover, a plurality of claws are provided on the right protective cover, and the claws match the slots.

[0014] In a preferred example, the present invention can be further configured as follows: the left protective cover and the right protective cover are made of lightweight anti-collision material.

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

[0016] 1. The present application sets a protective cover outside the pressure gauge body, and the protective cover is divided into two parts, the left and right parts, which wrap the pressure gauge, thereby preventing glass fragments from flying everywhere when the pressure gauge explodes, accidentally injuring staff and polluting the surrounding environment, thereby improving its safety.

[0017] 2. The present application is provided with a cut-off assembly. When the pressure on the pressure gauge exceeds the warning line of the pressure gauge, the knob can be rotated to cut off the air inlet channel, preventing the measured fluid from continuing to flow into the pressure gauge body, thereby avoiding damage to the user caused by the explosion of the pressure gauge and protecting the user's personal safety.

[0018] 3. The present application realizes the pop-up and closing of the protective cover and the closing of the airway through a purely mechanical mechanism, which has high reliability and uses almost no electronic components in the protective structure, thereby reducing the probability of failures due to damage to electronic components, and also reducing the cost and difficulty of maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Figure 1 : Schematic diagram of the overall structure of the pressure gauge;

[0021] Figure 2 : Main view of pressure gauge;

[0022] Figure 3 : Schematic diagram of the internal structure of the pressure gauge;

[0023] Figure 4 : Cross-sectional view of pressure gauge;

[0024] Figure 5 : Figure 4 A magnified image;

[0025] Figure 6 : Figure 4 Enlarged view of point B;

[0026] Figure 7 : Schematic diagram of the pressure gauge airway structure;

[0027] Figure 8 : Schematic diagram of the pressure gauge protective cover and clamping jaw assembly structure;

[0028] Fig. 9 : Schematic diagram of the structure of the gripper assembly;

[0029] Fig.10 : Schematic diagram of the truncated component structure.

[0030] Figures: 1, pressure gauge body; 2, connecting pipe; 3, base; 4, mounting frame; 41, first rotating shaft; 411, left protective cover; 42, second rotating shaft; 421, right protective cover; 5, clamping claw assembly; 51, sealing connecting rod; 52, plug body; 53, fixing block; 54, clamping claw; 55, limiting rod; 56, blocking plate; 6, ejection mechanism; 61, power storage assembly; 611, accommodating chamber; 6111, airway; 6112, spring piece; 6113, positioning connecting rod; 6114, positioning cap; 612, sealing plug; 613, ejection rod; 614, hook claw; 615, limiting block; 6151 , card slot; 616, fixed seat; 617, lever; 62, starting assembly; 621, transmission block; 622, first gear; 623, second gear; 624, rack; 625, moving block; 626, mounting bracket; 627, push rod; 7, knob switch; 71, rotating shaft one; 72, side bevel gear one; 73, side bevel gear two; 74, rotating shaft two; 8, truncation assembly; 81, inner ring; 82, outer ring; 83, blade; 84, limit slot; 85, limit shaft; 86, blade connecting rod; 87, outer shell; 88, driving wheel; 9, rotating shaft; 10, ejection button; 11, slide slot. DETAILED DESCRIPTION

[0031] This section will describe in detail the specific embodiments of the present application. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0032] The following is combined with Figure 1-10 The invention is described in further detail.

[0033] Reference Figure 1 , Figure 2 and Figure 3In the description of the present invention, the present invention provides an explosion-proof pressure gauge, including a pressure gauge body 1 and a connecting pipe 2, the pressure gauge body 1 is fixedly connected to the connecting pipe 2, a base 3 is provided below the pressure gauge body 1, the connecting pipe 2 passes through the base 3 and is fixedly connected to the base 3, a mounting frame 4 is provided in the middle of the base 3, a first rotating shaft 41 and a second rotating shaft 42 are provided in the mounting frame 4, the first rotating shaft 41 and the second rotating shaft 42 are arranged opposite to each other and are rotatably connected to the mounting frame 4, and the first rotating shaft 41 is fixedly connected to a left protective cover 411 The second rotating shaft 42 is fixedly connected with a right protective cover 421, and the left protective cover 411 and the right protective cover 422 can wrap the pressure gauge body 1 therein. The left protective cover 411 and the right protective cover 422 are provided with a clamping claw assembly 5, and ejection mechanisms 6 are provided on both sides of the mounting frame 4. The ejection mechanism 6 is arranged inside the base 3, and a knob switch 7 is provided on the side surface of the base 3. A cut-off assembly 8 is connected to one side of the knob switch 7. A slide groove 11 is provided on the side surface of the base 3, and an ejection button 10 is provided at the bottom of the base 3, and the ejection button 10 is connected to the ejection mechanism 6.

[0034] The present application sets a left protective cover 411 and a right protective cover 421 outside the pressure gauge body. By wrapping the pressure gauge with the left and right protective covers, it can prevent glass fragments from flying everywhere when the pressure gauge explodes, thereby preventing accidental injury to staff and polluting the surrounding environment, thereby improving its safety; in the initial state, the clamping jaw assembly 5 is placed in the accommodating bin 611, so that the accommodating bin 611 forms an enclosed space, and the ejection mechanism 6 increases the pressure by squeezing the internal space of the accommodating bin 611, thereby providing power for the ejection and closing of the protective cover, and storing power for the ejection mechanism 6 by pulling the lever 617 extending out of the slide slot 11.

[0035] Reference Figure 3 , Figure 4 , Figure 5 and Figure 6The ejection mechanism 6 includes a power storage component 61 and a starting component 62. The power storage component includes a storage bin 611, a sealing plug 612, an ejection rod 613, a hook 614, a limit block 615, a fixing seat 616 and a lever 617. The storage bin 611 is arranged inside the base 3. The opening end of the storage bin 611 is arranged on the outer surface of the base 3. The sealing plug 612 is placed in the storage bin 611. The ejection rod 613 is fixedly connected to the bottom of the storage bin 611. The ejection rod 613 passes through the bottom of the storage bin 611. A spring is connected between the sealing plug 612 and the storage bin 611. One end of the rod 613 is connected to a hook claw 614, one side of the hook claw 614 is an inclined surface, and one side of the hook claw 614 is provided with the limit block 615, one side of the limit block is provided with a clamping groove 6151, and the upper and lower sides of the clamping groove 6151 are both inclined surfaces, the fixed seat 616 is fixedly connected to the base 3, a spring is provided between the fixed seat 616 and the limit block 615, the base 3 is provided with a guide rail, and the limit block 615 is slidably connected to the base 3 through the guide rail, and a lever 617 is provided between the ejection rod 613 and the hook claw 614, and one end of the lever 617 passes through the slide groove 11 and is placed on the outside of the base 3.

[0036] The slide grooves 11 are symmetrically provided with two, and each slide groove 11 is provided with a lever 617. In the initial state, the lever 617 extending out of the slide groove 11 is pulled, and the lever 617 drives the ejection rod 613 to move downward, and the sealing plug 612 also moves downward. The sealing plug 612 squeezes the spring below to deform it and accumulate elastic potential energy. The hook 614 at one end of the ejection rod 613 moves downward, and the hook 614 intersects with the inclined surface of the limit block 615. The hook 614 pushes the limit block 615 to move to one side and squeezes the spring between the fixed seat 616. When the hook 614 falls into the clamping groove 6151, the limit block 615 is reset under the action of the spring, and the hook 614 is clamped with the clamping groove 6151. The positions of the ejection rod 613 and the sealing plug 612 are locked, realizing the force storage function.

[0037] Reference Figure 7 and Fig. 9 An air duct 6111 is provided on the inner wall of the accommodating bin 611, and the air duct 6111 is arranged at one end of the bottom of the accommodating bin 611 to be open. A spring piece 6112 is provided on the inner wall of the accommodating bin 6111 at the other end of the air duct 6111. A positioning connecting rod 6113 is provided along the inner diameter of the accommodating bin 611, and a positioning cap 6114 is provided in the middle of the positioning connecting rod 6113.

[0038] The clamping jaw 54 in the clamping jaw assembly 5 grabs the positioning cap 6114 to achieve the position locking of the clamping jaw assembly 5.

[0039] When the ejection rod 613 and the sealing plug 612 in the locked position are unlocked, the pressure in the accommodating chamber 611 increases instantly, and the pressure in the airway 6111 also increases. The increased pressure pushes the spring piece 6112 to deform into the accommodating chamber 611, thereby pushing the clamping jaw 54 in the clamping jaw assembly 5, and the clamping jaw 54 rotates around the rotating axis, so that the clamping jaw assembly 5 is released from the limited state.

[0040] Reference Figure 3 The starting assembly 62 includes a transmission block 621, a first gear 622, a second gear 623, a rack 624, a moving block 625, a mounting frame 626 and a push rod 627. The ejection button 10 is fixedly connected to the transmission block 621. A spring is connected between the transmission block 621 and the base 3. The transmission block 621 is slidably connected to the base 3. Gear teeth are provided on both sides of the transmission block 621. One side of the transmission block 621 is meshed with the first gear 622. One side of the first gear 622 A second gear 623 is meshed with the rack 624 below which the second gear 623 is meshed. A moving block 625 is fixedly connected to one side of the rack 624. A push rod 627 is fixedly connected to the moving block 625. The mounting frame 626 is fixedly connected to the base 3. The moving block 625 is slidably connected to the mounting frame 626. The first gear 622 and the second gear 623 are connected to the base 3 via a rotating shaft. A spring is provided between the moving block 625 and the fixed seat 616.

[0041] Push the ejection button 10 upward, the transmission block 621 moves upward, the transmission block 621 drives the first gear 622 to rotate, the first gear 622 drives the second gear 623 to rotate, the second gear 623 drives the rack 624 to move to both sides of the base 3, the rack 624 drives the moving block 625 to move, the moving block 625 drives the pushing rod 627 to move, the pushing rod 627 pushes the limiting block 615 to move, the hook 614 leaves the clamping groove 6151, the ejection rod 613 and the sealing plug 612 are unlocked, and under the action of the spring force, the ejection rod 613 and the sealing plug 612 are quickly reset and squeeze the air in the accommodating chamber 611 to increase the pressure, thereby ejecting the protective cover and resetting the limiting block 615.

[0042] Reference Figure 2 , Figure 8 and Fig. 9The clamping jaw assembly 5 includes a sealing connecting rod 51, a plug body 52, a fixed block 53, a clamping jaw 54, a limiting rod 55 and a blocking piece 56. The sealing connecting rod 51 is hinged with the protective cover. The plug body 52 is fixedly connected to the middle part of the sealing connecting rod 51. One end of the sealing connecting rod 51 is fixedly connected to the fixed block 53. The clamping jaw 54 is provided on the fixed block 53. The clamping jaw 54 is rotatably connected to the fixed block 53. Two blocking pieces 56 are provided in the middle part of the fixed block 53. The blocking piece 56 is provided with a through hole. The limiting rod 55 passes through the through hole. One end of the limiting rod 55 contacts the clamping jaw 54. The other end of the limiting rod 55 is fixedly connected to a spring.

[0043] In the initial state, the clamping jaw assembly 5 is placed in the accommodating chamber 611, the hook portion 541 of the clamping jaw 54 contacts the positioning cap 6114, the clamping jaw 54 rotates around the rotating axis, and at the same time squeezes the spring between the limiting rods 55, the hook portion 541 moves downward and is clamped under the positioning cap 6114, the spring between the limiting rods 55 is reset, the clamping jaw 54 clamps the positioning cap 6114, and the inflection point 542 of the clamping jaw 54 rests on the spring piece 6112.

[0044] After unlocking, when the pressure in the accommodating chamber 611 continues to increase, the spring piece 6112 in the airway 6111 is deformed and squeezes the inflection point 542. The inflection point 542 is driven by the force to rotate the clamp, and the hook portion 541 opens, loosening the positioning cap 6114, and the clamp assembly 5 is released from the locked state. The clamp assembly 5 is bounced up and closed with the protective cover.

[0045] Reference Fig. 9 The sealing connecting rod 51 has a spherical end at one end and a cylindrical end at the other end, and both ends are larger than the diameter of the through hole. The sealing connecting rod 51 slides on the blocking sheet.

[0046] Reference Figure 3 and Fig.10The truncation component 8 includes an inner ring 81, an outer ring 82, a blade 83, a limiting groove 84, a limiting shaft 85, a blade connecting rod 86 and an outer shell 87. The outer shell 87 is arranged inside the base 3 and fixedly connected to the connecting pipe 2. The inner ring 81 is fixedly connected to the middle part of the outer shell 87. The hollow part of the inner ring 81 is the air inlet channel of the connecting pipe 2. The outer ring 82 is sleeved on the outer side of the inner ring 81. The outer ring 82 is slidably connected to the inner ring 81. Limiting grooves 84 are equidistantly provided on the circular ring 82, the outer circular ring 82 is arranged in the outer shell 87, a limiting shaft 85 is provided on the outer shell 87, the limiting shaft 85 is placed in the limiting groove 84, one end of the blade 83 is hinged to the inner circular ring 81, the other end of the blade 83 is hinged to the blade connecting rod 86, one end of the blade connecting rod 86 is hinged to the outer circular ring 82, gear teeth are provided on the outer side of the outer circular ring 82, a driving wheel 88 is provided on one side of the outer circular ring 82, and the driving wheel 88 is meshed with the outer circular ring 82.

[0047] The rotation of the driving wheel 88 drives the outer ring 82 to rotate, and the rotation of the outer ring 82 drives the blade connecting rod 86 to move. The blade connecting rod 86 pulls the blade 83, and the blade 83 rotates around the rotating shaft to realize the opening and closing of the blade 83 and block the air inlet. The limit shaft 85 starts to limit the rotation range.

[0048] Reference Fig.10 A rotating shaft 71 is provided on one side of the knob switch 7, a side bevel gear 72 is provided on the rotating shaft 71, a side bevel gear 73 is meshed with one side of the side bevel gear 72, the side bevel gear 73 is sleeved on the rotating shaft 74, and the driving wheel 88 is fixedly connected to the rotating shaft 74.

[0049] When the air intake duct needs to be closed, the knob switch 7 is rotated. The rotation of the knob switch 7 drives the rotating shaft 1 71 to rotate, the rotating shaft 1 71 drives the side bevel gear 1 72 to rotate, the side bevel gear 1 72 drives the side bevel gear 2 73 to rotate, and the side bevel gear 2 73 drives the driving wheel 88 to rotate, thereby providing power for the opening and closing of the blade 83.

[0050] The left protective cover 411 is provided with a plurality of slots (not shown in the figure), and the right protective cover 421 is provided with a plurality of claws (not shown in the figure), and the claws match the slots. The left protective cover 411 and the right protective cover 421 cooperate with each other through the claws and the slots, so that the left protective cover 411 and the right protective cover 421 are locked to each other.

[0051] Reference Figure 1The left protective cover 411 and the right protective cover 421 are made of light anti-collision material. The protective cover made of light material can reduce the power required for lifting, and the anti-collision material ensures the strength of the protective cover, which can prevent the glass fragments of the pressure gauge from flying around when it explodes, accidentally injuring the staff and polluting the surrounding environment, thereby improving its safety.

[0052] Working principle: In the initial state, the lever 617 extending out of the slide slot 11 is pulled, and the lever 617 drives the ejection rod 613 to move downward, and the sealing plug 612 also moves downward. The sealing plug 612 squeezes the spring below to deform it and accumulate elastic potential energy. The hook 614 at one end of the ejection rod 613 moves downward, and the hook 614 intersects with the inclined surface of the limit block 615. The hook 614 pushes the limit block 615 to move to one side and squeezes the spring between the fixed seat 616. When the hook 614 falls into the clamping groove 6151, the limit block 615 is in the spring Under the action of , the hook claw 614 is clamped with the clamping groove 6151, the positions of the ejection rod 613 and the sealing plug 612 are locked, and the force storage function is realized. The clamping jaw assembly 5 is placed in the accommodating chamber 611, and the hook claw portion 541 of the clamping jaw 54 contacts the positioning cap 6114. The clamping jaw 54 rotates around the central axis and squeezes the spring between the limiting rods 55 at the same time. The hook claw portion 541 is clamped under the positioning cap 6114, and the spring between the limiting rods 55 is reset. The clamping jaw 54 clamps the positioning cap 6114, and the inflection point 542 of the clamping jaw 54 rests on the spring piece 6112.

[0053] When the pressure is abnormal, the staff pushes the ejection button 10 upward, the transmission block 621 moves upward, the transmission block 621 drives the first gear 622 to rotate, the first gear 622 drives the second gear 623 to rotate, the second gear 623 drives the rack 624 to move to both sides of the base 3, the rack 624 drives the moving block 625 to move, the moving block 625 drives the push rod 627 to move, the push rod 627 drives the limit block 615 to move, and the hook 614 leaves the clamping groove 6151 The ejection rod 613 and the sealing plug 612 are unlocked. Under the action of the spring force, the ejection rod 613 and the sealing plug 612 are quickly reset and squeeze the air in the accommodating chamber 611 to increase the pressure. As the pressure increases, the spring piece 6112 in the airway 6111 deforms and squeezes the inflection point 542. The inflection point 542 is forced to drive the clamping jaw 54 to rotate, and the hook portion 541 opens. The clamping jaw assembly 5 is out of the locked state, and the clamping jaw assembly 5 is ejected and closed with the protective cover.

[0054] At the same time, the knob switch 7 is rotated, and the rotation of the knob switch 7 drives the rotating shaft 1 71 to rotate, the rotating shaft 1 71 drives the side bevel gear 1 72 to rotate, the side bevel gear 1 72 drives the side bevel gear 2 73 to rotate, the side bevel gear 2 73 drives the driving wheel 88 to rotate, the driving wheel 88 drives the outer ring 82 to rotate, the outer ring 82 drives the blade connecting rod 86 to move, the blade connecting rod 86 pulls the blade 83, and the blade 83 rotates around the rotating shaft to realize the opening and closing of the blade 83. The blade can be closed to block the entry of airflow, thereby protecting the pressure gauge.

[0055] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An explosion-proof pressure gauge, comprising a pressure gauge body (1) and a connecting pipe (2), wherein the pressure gauge body (1) is fixedly connected to the connecting pipe (2), and characterized in that: A base (3) is provided below the pressure gauge body (1); the connecting pipe (2) passes through the base (3) and is fixedly connected to the base (3); a mounting frame (4) is provided in the middle of the base (3); a first rotating shaft (41) and a second rotating shaft (42) are provided in the mounting frame (4); the first rotating shaft (41) and the second rotating shaft (42) are arranged opposite to each other and are rotatably connected to the mounting frame (4); the first rotating shaft (41) is fixedly connected to a left protective cover (411); the second rotating shaft (42) is fixedly connected to a right protective cover (421); the left protective cover (411) and the right protective cover (422) can wrap the pressure gauge body (1) therein. The left protective cover (411) and the right protective cover (422) are provided with a clamping claw assembly (5), and ejection mechanisms (6) are provided on both sides of the mounting frame (4), and the ejection mechanism (6) is arranged inside the base (3). A knob switch (7) is provided on the side surface of the base (3), and a cut-off assembly (8) is connected to one side of the knob switch (7). A sliding groove (11) is provided on the side surface of the base (3), and an ejection button (10) is provided at the bottom of the base (3), and the ejection button (10) is connected to the ejection mechanism (6); the ejection mechanism (6) includes a power storage assembly (61) and a starting assembly (62), and the power storage assembly includes a storage bin (611), a sealing plug (612), an ejection rod (613), a hook (614), a limit block (615), a fixing seat (616) and a lever (617), the accommodating chamber (611) is arranged inside the base (3), the opening end of the accommodating chamber (611) is arranged on the outer surface of the base (3), the sealing plug (612) is placed in the accommodating chamber (611), the ejection rod (613) is fixedly connected below the sealing plug (612), the ejection rod (613) passes through the bottom of the accommodating chamber (611), a spring is connected between the sealing plug (612) and the accommodating chamber (611), one end of the ejection rod (613) is connected to a hook (614), the hook One side of the claw (614) is an inclined surface, one side of the hook claw (614) is provided with the limit block (615), one side of the limit block is provided with a clamping groove (6151), and the upper and lower sides of the clamping groove (6151) are both inclined surfaces, the fixed seat (616) is fixedly connected to the base (3), a spring is provided between the fixed seat (616) and the limit block (615), the base (3) is provided with a guide rail, the limit block (615) is slidably connected to the base (3) through the guide rail, and a lever (617) is provided between the ejection rod (613) and the hook claw (614), and one end of the lever (617) passes through the slide groove (11) and is placed on the outer side of the base (3);An air passage (6111) is provided on the inner wall of the accommodating chamber (611), and the air passage (6111) is arranged at one end of the bottom of the accommodating chamber (611) to be open. A spring (6112) is provided on the inner wall of the accommodating chamber (6111) at the other end of the air passage (6111). A positioning connecting rod (6113) is provided along the inner diameter of the accommodating chamber (611), and a positioning cap (6114) is provided in the middle of the positioning connecting rod (6113). The starting assembly (62) comprises a transmission block (621), a first gear (622), a second gear (623), a rack (624), a moving block (625), a mounting frame (626) and a pushing rod (627). The ejection button (10) is fixedly connected to the transmission block (621), a spring is connected between the transmission block (621) and the base (3), and the transmission block (621) is slidably connected to the base (3), gear teeth are provided on both sides of the transmission block (621), the first gear (622) is meshed on one side of the transmission block (621), the second gear (623) is meshed on one side of the first gear (622), the rack (624) is meshed below the second gear (623), a moving block (625) is fixedly connected to one side of the rack (624), a push rod (627) is fixedly connected to the moving block (625), the mounting frame (626) is fixedly connected to the base (3), the moving block (625) is slidably connected to the mounting frame (626), the first gear (622) and the second gear (623) are connected to the base (3) via a rotating shaft, and a spring is provided between the moving block (625) and the fixed seat (616). ; 2. An explosion-proof pressure gauge according to claim 1, characterized in that: The clamping jaw assembly (5) comprises a sealing connecting rod (51), a plug body (52), a fixing block (53), a clamping jaw (54), a limiting rod (55) and a blocking plate (56). The sealing connecting rod (51) is hinged to the protective cover. The plug body (52) is fixedly connected to the middle of the sealing connecting rod (51). One end of the sealing connecting rod (51) is fixedly connected to the fixing block (53). The clamping jaw (54) is provided on the fixing block (53). The clamping jaw (54) is rotatably connected to the fixing block (53). Two blocking plates (56) are provided in the middle of the fixing block (53). A through hole is formed in the blocking plate (56). The limiting rod (55) passes through the through hole. One end of the limiting rod (55) contacts the clamping jaw (54). The other end of the limiting rod (55) is fixedly connected to a spring.

3. An explosion-proof pressure gauge according to claim 2, characterized in that: One end of the sealing connecting rod (51) is spherical, and the other end is cylindrical, and both ends are larger than the diameter of the through hole.

4. An explosion-proof pressure gauge according to claim 3, characterized in that: The truncation component (8) comprises an inner ring (81), an outer ring (82), blades (83), a limiting groove (84), a limiting shaft (85), a blade connecting rod (86) and an outer shell (87); the outer shell (87) is arranged inside the base (3) and fixedly connected to the connecting pipe (2); the inner ring (81) is fixedly connected to the middle part of the outer shell (87); the hollow part of the inner ring (81) is an air inlet passage of the connecting pipe (2); the outer ring (82) is sleeved on the outer side of the inner ring (81); the outer ring (82) is slidably connected to the inner ring (81); and the outer ring (82) is slidably connected to the inner ring (81). Limiting grooves (84) are equidistantly provided on the circular ring (82); the outer circular ring (82) is arranged inside the outer shell (87); a limiting shaft (85) is provided on the outer shell (87); the limiting shaft (85) is placed inside the limiting groove (84); one end of the blade (83) is hinged to the inner circular ring (81); the other end of the blade (83) is hinged to the blade connecting rod (86); one end of the blade connecting rod (86) is hinged to the outer circular ring (82); gear teeth are provided on the outer side of the outer circular ring (82); a driving wheel (88) is provided on one side of the outer circular ring (82); the driving wheel (88) is meshed with the outer circular ring (82).

5. An explosion-proof pressure gauge according to claim 4, characterized in that: A rotating shaft 1 (71) is provided on one side of the knob switch (7), a side bevel gear 1 (72) is provided on the rotating shaft (71), a side bevel gear 2 (73) is meshed on one side of the side bevel gear 1 (72), the side bevel gear 2 (73) is sleeved on the rotating shaft 2 (74), and the driving wheel (88) is fixedly connected to the rotating shaft 2 (74).

6. An explosion-proof pressure gauge according to claim 1, characterized in that: The left protective cover (411) is provided with a plurality of slots, and the right protective cover (421) is provided with a plurality of claws, the claws matching the slots.

7. An explosion-proof pressure gauge according to claim 1, characterized in that: The left protective cover (411) and the right protective cover (421) are made of lightweight anti-collision material.

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