Explosion-proof pressure gauge

Abstract

The utility model belongs to the technical field of pressure gauges, and particularly provides an explosion-proof pressure gauge, which comprises a gauge shell and a pipe joint, a spring pipe, a pull rod, a sector gear, a dial plate and a gear movement are arranged in the gauge shell, the pipe joint is fixedly connected below the gauge shell, a connector is fixed on the upper surface of the pipe joint, and the spring pipe is fixedly connected at the right end of the connector. A pull rod is hinged to the end, away from the connector, of the bourdon tube, a sector gear is fixedly connected to the end, away from the bourdon tube, of the pull rod, a gear movement is meshed with the right end of the sector gear and installed on the dial plate, a pointer is arranged on the gear movement, a switch assembly is arranged on one side of the dial plate, and the switch assembly is arranged at the maximum measuring range. A connecting pipeline is arranged below the pipe connector, and a cut-off assembly is arranged in the middle of the connecting pipeline. The explosion-proof pressure gauge has the technical effects that the explosion-proof pressure gauge is provided, the pressure gauge is prevented from exploding by blocking the entry of fluid, and the pressure gauge is protected.

Description

Technical Field

[0001] The utility model relates to the technical field of instruments and meters, 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 utility model to solve its technical problems is: an explosion-proof pressure gauge, including a case and a pipe joint, wherein a spring tube, a pull rod, a sector gear, a dial and a gear movement are arranged in the case, a pipe joint is fixedly connected to the bottom of the case, a connecting head is fixedly arranged on the upper surface of the pipe joint, a spring tube is fixedly connected to the right end of the connecting head, a pull rod is hingedly connected to the end of the spring tube away from the connecting head, a sector gear is fixedly connected to the end of the pull rod away from the spring tube, the right end of the sector gear is meshed with the gear movement, the gear movement is mounted on the dial, a pointer is arranged on the gear movement, a switch assembly is arranged on one side of the dial, the switch assembly is arranged at the maximum range, a connecting pipe is arranged below the pipe joint, and a cut-off assembly is arranged in the middle of the connecting pipe.

[0006] In a preferred example, the utility model can be further configured as follows: the switch assembly includes a lower base, a switch seat, a metal plate, a metal frame, a spring and a rotating shaft; the lower base is installed on the dial; the lower base is provided with the metal frame; the metal frame is provided with a first slot; the switch seat is provided above the lower base; the switch seat is rotatably connected to the lower base via the rotating shaft; a metal plate is fixedly connected to the switch seat; the metal plate is provided with a second slot; one end of the spring is connected to the first slot, and the other end is connected to the second slot.

[0007] In a preferred example, the utility model can be further configured as follows: the switch assembly includes a lower base, a switch seat, a metal plate, a metal frame, a spring and a rotating shaft; the lower base is installed on the dial; the lower base is provided with the metal frame; the metal frame is provided with a first slot; the switch seat is provided above the lower base; the switch seat is rotatably connected to the lower base via the rotating shaft; a metal plate is fixedly connected to the switch seat; the metal plate is provided with a second slot; one end of the spring is connected to the first slot, and the other end is connected to the second slot.

[0008] In a preferred example, the present invention can be further configured as follows: a groove is provided in the middle of the lower base.

[0009] In a preferred example, the utility model can be further configured as follows: the cut-off component includes an outer shell, a driving motor, a driving wheel, a gear ring, an adjusting blade and an adjusting chassis, the outer shell is fixedly connected to the connecting pipe, the adjusting chassis is fixedly connected to the bottom of the outer shell, an annular groove is provided on the adjusting chassis, a slider is provided at the bottom of the gear ring, the slider matches the annular groove, the inner and outer rings of the gear ring are provided with gear teeth, a flow channel is provided at the center of the adjusting chassis, a rotating shaft is provided along the edge of the flow channel on the adjusting chassis, the rotating shaft is rotatably connected to the adjusting chassis, a driven gear is fixedly connected to one end of the rotating shaft, and the adjusting blade is fixedly connected to the other end of the rotating shaft.

[0010] In a preferred example, the utility model can be further configured as follows: the driving motor is provided on one side of the gear ring, the driving wheel is mounted on the output shaft of the driving motor, and the driving wheel is meshed with the gear ring.

[0011] In a preferred example, the present invention can be further configured as follows: five rotating shafts are provided.

[0012] In a preferred example, the present invention can be further configured as follows: the pipe joint is a copper joint.

[0013] In a preferred example, the utility model can be further configured as follows: a pull ring is provided on the watch case, and the pull ring is arranged in an arc shape.

[0014] Compared with the prior art, this application has the following beneficial effects:

[0015] 1. 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 cut-off assembly closes, cutting off the air inlet passage, 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.

[0016] 2. The present application sets a switch assembly in the pressure gauge. When the pressure of the pressure gauge exceeds the warning line, the pointer in the dial touches the switch assembly, so that the cut-off assembly starts to block the influx of gas, and the degree of automation is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model will be further described below in conjunction with the accompanying drawings.

[0018] Figure 1 : Schematic diagram of the overall structure of the pressure gauge;

[0019] Figure 2 : Cross-sectional view of the overall structure of the pressure gauge;

[0020] Figure 3 : Side view of the overall structure of the pressure gauge;

[0021] Figure 4 : Schematic diagram of the overall structure of the switch assembly;

[0022] Figure 5 : Schematic diagram of the internal structure of the switch component;

[0023] Figure 6 : Cross-sectional view of switch assembly;

[0024] Figure 7 : Cut-off component section view;

[0025] Figure 8 : Schematic diagram of the internal structure of the truncation component;

[0026] Fig. 9 : Schematic diagram of adjusting chassis structure;

[0027] Fig.10 : Schematic diagram of the gear ring structure.

[0028] Figure numerals: 1. case; 11. spring tube; 12. pull rod; 13. sector gear; 14. dial; 15. gear movement; 16. switch assembly; 161. lower base; 1611. groove; 162. switch seat; 163. metal plate; 1631. notch 2; 164. metal frame; 1641. notch 1; 165. spring; 166. shaft; 17. pointer; 2. pipe joint; 3. connector; 4. connecting pipe; 5. cut-off assembly; 51. outer shell; 52. driving motor; 53. driving wheel; 54. gear ring; 541. slider; 55. adjusting fan blade; 56. adjusting chassis; 561. flow channel; 562. rotating shaft; 563. driven gear; 564. annular groove. DETAILED DESCRIPTION

[0029] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model 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 utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0030] The following is combined with Figure 1-10 The utility model is described in further detail.

[0031] Reference Figure 1 , Figure 2 and Figure 3 In the description of the utility model, the utility model provides an explosion-proof pressure gauge, including a 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 case 1, a pipe joint 2 is fixedly connected to the bottom of the case 1, a connector 3 is fixedly provided on the upper surface of the pipe joint 2, a spring tube 11 is fixedly connected to the right end of the connector 3, a pull rod 12 is hingedly connected to the end of the spring tube 11 away from the connector 3, a sector gear 13 is fixedly connected to the end of the pull rod 12 away from the spring tube 11, the gear movement 15 is meshed at the right end of the sector gear 13, the gear movement 15 is mounted on the dial 14, a pointer 17 is arranged on the gear movement 15, a switch assembly 16 is arranged on one side of the dial 14, and the switch assembly 16 is arranged at the maximum range, a connecting pipe 4 is arranged below the pipe joint 2, and a cut-off assembly 5 is arranged in the middle of the connecting pipe 4.

[0032] One end of the spring tube 11 is fixed on the connector 3, and the other end can move. When the measured fluid enters the pressure gauge, the spring tube 11 is stretched, and the pull rod 12 transmits the deformation torque to the fan gear 13, which is meshed with the gear movement 15. The rotation of the fan gear 13 drives the pointer connected to the central axis of the gear movement 15, thereby displaying the pressure value. The spring tube 11 converts the elastic deformation into rotational motion, causing the pointer to deflect to display the pressure. The degree of deformation of the spring tube 11 is proportional to the magnitude of the pressure. The other end of the gear movement 15 is connected to a coil spring. When the gear movement 15 rotates, the coil spring contracts and stores energy. When the detection stops, the connected coil spring will release the previously stored energy, causing it to rotate in the opposite direction until it returns to its original position. The switch assembly 16 can control the opening of the cut-off assembly 5. When the pressure on the pressure gauge exceeds the pressure gauge warning line, the cut-off assembly 5 is closed, cutting off the air intake channel, and preventing the measured fluid from continuing to flow into the pressure gauge body, thereby avoiding the explosion of the pressure gauge and causing damage to the user, and protecting the user's personal safety.

[0033] Reference Figure 4 , Figure 5 and Figure 6The switch assembly 16 includes a lower base 161, a switch seat 162, a metal plate 163, a metal frame 164, a spring 165 and a rotating shaft 166. The lower base 161 is installed on the dial 14. The metal frame 164 is provided on the lower base 161. The metal frame 164 is provided with a slot 1641. The switch seat 162 is provided above the lower base 161. The switch seat 162 is rotatably connected to the lower base 161 through the rotating shaft 166. The metal plate 163 is fixed in the switch seat 162. The metal plate 163 is provided with a slot 2 1631. One end of the spring 165 is connected to the slot 1 1641, and the other end is connected to the slot 2 1631.

[0034] When the cut-off assembly 5 is in a stopped state, the switch seat 162 and the metal plate 163 are tilted to one side of the lower base, and the spring 165 pulls the metal plate 163 and the metal frame 164, so that the position of the switch seat 162 is fixed. When the measured pressure exceeds the warning line, the pointer contacts the switch seat 162 and pushes the switch seat 162. The switch seat 162 is tilted toward the other side of the lower base around the rotating shaft 166 under force. When the spring 165 passes the equilibrium state, the spring 165 pulls the metal plate 163 and the metal frame 164, so that the switch seat 162 is fixed at the other side. At this time, the metal plate 163 contacts the contact at one end of the lower base 161, the circuit is turned on, and the cut-off assembly 5 is driven to open.

[0035] Reference Figure 6 A groove 1611 is provided in the middle of the lower base 161. The groove 1611 can provide space for the switch seat 162 to tilt.

[0036] Reference Figure 7 , Figure 8 , Fig. 9 and Fig.10 The truncation component 5 includes an outer shell 51, a driving motor 52, a driving wheel 53, a ring gear 54, an adjusting blade 55 and an adjusting chassis 56. The outer shell 51 is fixedly connected to the connecting pipe 4. The adjusting chassis 56 is fixedly connected to the bottom of the outer shell 51. An annular groove 564 is provided on the adjusting chassis 56. A slider 541 is provided at the bottom of the ring gear 54. The slider 541 matches the annular groove 56. The inner and outer rings of the ring gear 54 are provided with gear teeth. A flow channel 561 is provided at the center of the adjusting chassis 56. A rotating shaft 562 is provided on the adjusting chassis 56 along the edge of the flow channel 561. The rotating shaft 562 is rotatably connected to the adjusting chassis 56. A driven gear 563 is fixedly connected to one end of the rotating shaft 562, and an adjusting blade 55 is fixedly connected to the other end of the rotating shaft 562.

[0037] Reference Figure 8The driving motor 52 is disposed on one side of the gear ring 54 , and the driving wheel 53 is mounted on the output shaft of the driving motor 52 , and the driving wheel 53 is meshed with the gear ring 54 .

[0038] When the pressure of the pressure gauge exceeds the warning value, the switch assembly 16 drives the cut-off assembly 5 to start, the drive motor 52 starts, the shaft of the drive motor 52 drives the driving wheel 53 to rotate, the driving wheel 53 drives the gear ring 54 meshing therewith to rotate, the gear ring 54 drives the driven wheel 563 meshing therewith to rotate, the driven wheel 563 drives the shaft 562 to rotate, the shaft 562 drives the adjusting blade 55 to rotate, thereby achieving the closure of the flow channel 561, blocking the fluid from entering the pressure gauge body, and thus protecting the pressure gauge.

[0039] Reference Figure 8 There are five rotating shafts 562 . Each rotating shaft 562 is provided with a driven gear 563 and an adjusting blade 55 . The plurality of adjusting blades 55 cooperate with each other to achieve the closure of the flow channel 561 .

[0040] Reference Figure 1 The pipe joint is a copper joint. The chemical properties of copper are relatively stable, it is not easy to corrode, and it will not produce toxic substances. It can better prevent corrosion and is beneficial to protecting the pipeline. Copper has a high melting point and good heat resistance and will not be damaged by high temperature.

[0041] Reference Figure 1 The watch case 1 is provided with a pull ring, and the pull ring is arranged in an arc shape.

[0042] Working principle: when the measured pressure exceeds the warning line, the pointer contacts the switch seat 162 and pushes the switch seat 162. The switch seat 162 is tilted toward the other side of the lower base around the rotating shaft 166 under force. When the spring 165 exceeds the equilibrium state, the spring 165 pulls the metal plate 163 and the metal frame 164, so that the switch seat 162 is fixed at the other side. At this time, the metal plate 163 contacts the contact point at one end of the lower base 161, and the circuit is turned on, driving the cutoff component 5 to open, and the driving motor 52 is started. The rotating shaft of the driving motor 52 drives the driving wheel 53 to rotate, and the driving wheel 53 drives the gear ring 54 engaged therewith to rotate, and the gear ring 54 drives the driven wheel 563 engaged therewith to rotate, and the driven wheel 563 drives the rotating shaft 562 to rotate, and the rotating shaft 562 drives the adjusting fan blade 55 to rotate, thereby realizing the closure of the flow channel 561, blocking the fluid from entering the pressure gauge body, thereby protecting the pressure gauge.

[0043] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. An explosion-proof pressure gauge, characterized in that: The invention 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 connecting head (3) is fixedly connected to the upper surface of the pipe joint (2), the right end of the connecting head (3) is fixedly connected to the spring tube (11), the end of the spring tube (11) away from the connecting head (3) is hingedly connected to the pull rod (12), and the pull rod (12) is away from the spring tube. One end of the (11) is fixedly connected to a sector gear (13), the right 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 (17) is provided on the gear movement (15), a switch assembly (16) is provided on one side of the dial (14), the switch assembly (16) is arranged at the maximum range, a connecting pipe (4) is provided below the pipe joint (2), and a cut-off assembly (5) is provided in the middle of the connecting pipe (4).

2. An explosion-proof pressure gauge according to claim 1, characterized in that: The switch assembly (16) comprises a lower base (161), a switch seat (162), a metal plate (163), a metal frame (164), a spring (165) and a rotating shaft (166). The lower base (161) is mounted on the dial (14). The metal frame (164) is provided on the lower base (161). The metal frame (164) is provided with a first notch (1641). The switch seat (162) is provided above the lower base (161). The switch seat (162) is rotatably connected to the lower base (161) via the rotating shaft (166). The switch seat (162) is fixedly connected with the metal plate (163). The metal plate (163) is provided with a second notch (1631). One end of the spring (165) is connected to the first notch (1641), and the other end is connected to the second notch (1631).

3. An explosion-proof pressure gauge according to claim 2, characterized in that: A groove (1611) is provided in the middle of the lower base (161).

4. An explosion-proof pressure gauge according to claim 3, characterized in that: The cut-off assembly (5) comprises an outer shell (51), a driving motor (52), a driving wheel (53), a gear ring (54), an adjusting blade (55) and an adjusting chassis (56); the outer shell (51) is fixedly connected to the connecting pipe (4); the adjusting chassis (56) is fixedly connected to the bottom of the outer shell (51); an annular groove (564) is formed on the adjusting chassis (56); a sliding block (541) is provided at the bottom of the gear ring (54); the sliding block (541) is in contact with the adjusting chassis (56); The annular groove (564) matches each other, the inner and outer rings of the gear ring (54) are both provided with gear teeth, a flow channel (561) is opened at the center of the adjusting chassis (56), a rotating shaft (562) is provided on the adjusting chassis (56) along the edge of the flow channel (561), the rotating shaft (562) is rotatably connected to the adjusting chassis (56), one end of the rotating shaft (562) is fixedly connected to a driven gear (563), and the other end of the rotating shaft (562) is fixedly connected to an adjusting fan blade (55).

5. An explosion-proof pressure gauge according to claim 4, characterized in that: The drive motor (52) is provided on one side of the gear ring (54), the driving wheel (53) is mounted on the output shaft of the drive motor (52), and the driving wheel (53) is meshed with the gear ring (54).

6. An explosion-proof pressure gauge according to claim 4, characterized in that: Five rotating shafts (562) are provided.

7. An explosion-proof pressure gauge according to claim 1, characterized in that: The pipe joint (2) is a copper joint.

8. An explosion-proof pressure gauge according to claim 1, characterized in that: The watch case (1) is provided with a pull ring, which is arranged in an arc shape.

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