High-temperature-resistant pressure gauge

Abstract

The utility model belongs to the technical field of pressure gauges, and particularly provides a high-temperature-resistant pressure gauge which comprises a gauge shell, a pipe joint is fixedly connected to the lower portion of the gauge shell, a threaded joint is arranged below the pipe joint, a connector is fixed to the upper surface of the pipe joint, a spring pipe is fixedly connected to one side of the connector, and the spring pipe is fixedly connected to the other side of the connector. One end of the spring tube is hinged to a pull rod, one end of the pull rod is connected with a sector gear, the right end of the sector gear is meshed with the gear movement, a pointer is arranged on a center shaft of the gear movement, an adjusting mechanism is arranged below the threaded connector, and threads are arranged on the outer portion of the adjusting mechanism. The high-temperature-resistant pressure gauge has the technical effects that the high-temperature-resistant pressure gauge is provided, and different air inlet pipelines are selected through the adjusting mechanism, so that the pressure gauge body is protected.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure gauges, in particular to a high temperature resistant pressure gauge. Background Art

[0002] Pressure gauge is a detection element for measuring pressure, and is widely used in various occasions with air pressure, such as fire protection, electricity, light industry, food and other industries. The spring tube pressure gauge uses the pressure generated by the fluid to be transmitted through the elasticity of the spring, and the pressure is transmitted through the fixed end of the spring to the central axis. The displacement change of the pointer attached to the center axis points to the corresponding data to characterize the pressure.

[0003] When measuring the pressure of a high-temperature medium, the current pressure gauge allows the high-temperature medium to directly enter the interior of the pressure gauge, causing the high temperature to cause damage to the components inside the pressure gauge, resulting in inaccurate readings of the pressure gauge and affecting the service life of the pressure gauge.

[0004] To this end, the utility model provides a high temperature resistant pressure gauge. Utility Model Content

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

[0006] The technical solution adopted by the utility model to solve its technical problems is: it includes a watch case, a pipe joint is fixedly connected to the bottom of the watch case, a threaded joint is provided below the pipe joint, a connecting head is fixed to the upper surface of the pipe joint, a spring tube is fixedly connected to one side of the connecting head, a pull rod is hinged at one end of the spring tube, a sector gear is connected to one end of the pull rod, the right end of the sector gear is meshed with the gear movement, a pointer is provided on the central axis of the gear movement, an adjustment mechanism is provided below the threaded joint, and threads are provided on the outside of the adjustment mechanism.

[0007] In a preferred example, the utility model can be further configured as follows: the regulating mechanism includes a serpentine tube, a straight tube, a selection component, an upper sealing plate and a lower sealing plate, the upper sealing plate and the lower sealing plate are arranged inside the regulating mechanism, the upper sealing plate is provided with two air holes, the air holes are respectively connected to the serpentine tube and the straight tube, the other end of the serpentine tube is connected to the selection component, the other end of the straight tube is connected to the selection component, the lower sealing plate is provided with an air hole, the air hole is connected to the selection component.

[0008] In a preferred example, the utility model can be further configured as follows: the selection component includes an outer shell, a hose, a piston, a push rod, a main valve, a return spring, a base, a lower bracket, a bypass valve spring and a bypass valve, the hose is filled with paraffin, the hose is provided with a piston, the push rod passes through the piston and is connected to the base above, the hose is outer-mounted with the main valve, the return spring is provided below the main valve, the return spring is sleeved on the hose, the lower bracket is installed below the base, part of the hose passes through the lower bracket and is sleeved in the bypass valve spring, the hose is provided with the bypass valve, the base and the lower bracket are sealed in the outer shell, a high-temperature air duct is opened on one side of the outer shell, a normal-temperature air duct is opened on the other side of the outer shell, and an air inlet is provided in the middle of the outer shell.

[0009] In a preferred example, the utility model can be further configured as follows: the high-temperature air duct is connected to the serpentine pipe, the normal-temperature air duct is connected to the straight-through pipe, and the air inlet duct is connected to the air hole of the lower sealing plate.

[0010] In a preferred example, the present invention can be further configured as follows: a lifting ring is provided at the top of the watch case.

[0011] In a preferred example, the utility model can be further configured as follows: a sealing rubber ring is provided at the connection between the threaded joint and the adjusting mechanism.

[0012] Compared with the prior art, the present application has the following beneficial effects: the present application can open the corresponding valve according to the temperature of the measured medium, the medium with high temperature enters the pressure gauge body through the high-temperature air duct, and the medium with normal temperature enters the pressure gauge body through the normal-temperature air duct. The serpentine tube can cool the high-temperature medium, and the medium is treated separately according to the temperature, thereby avoiding the damage of the internal parts of the pressure gauge caused by the high-temperature medium, improving the accuracy of the pressure gauge, and extending the service life of the pressure gauge. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model will be further described below in conjunction with the accompanying drawings.

[0014] Figure 1 : Schematic diagram of the overall structure of the pressure gauge;

[0015] Figure 2 : Schematic diagram of the internal structure of the pressure gauge;

[0016] Figure 3 : Schematic diagram of the regulating mechanism structure;

[0017] Figure 4 : Schematic diagram of the serpentine tube structure;

[0018] Figure 5 : Select component structure diagram;

[0019] Figure 6 : Select the first section view of the component;

[0020] Figure 7 : Select the second section view of the component.

[0021] : 1. case; 2. pipe joint; 3. threaded joint; 4. connector; 5. spring tube; 6. pull rod; 7. sector gear; 8. gear movement; 9. adjustment mechanism; 91. serpentine tube; 92. straight-through tube; 93. selection component; 930. outer shell; 9301. high-temperature air duct; 9302. normal-temperature air duct; 9303. air inlet duct; 931. hose; 932. piston; 933. push rod; 934. main valve; 935. return spring; 936. base; 937. lower bracket; 938. bypass valve spring; 939. bypass valve; 94. upper sealing plate; 95. lower sealing plate. DETAILED DESCRIPTION

[0022] 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.

[0023] The following is combined with Figure 1-7 The utility model is described in further detail.

[0024] Reference Figure 1 and Figure 2 In the description of the utility model, the utility model provides a high temperature resistant pressure gauge, including a case 1, a pipe joint 2 is fixedly connected to the bottom of the case 1, a threaded joint 3 is provided below the pipe joint 2, a connector 4 is fixed to the upper surface of the pipe joint 2, a spring tube 5 is fixedly connected to one side of the connector 4, a pull rod 6 is hinged at one end of the spring tube 5, a sector gear 7 is connected to one end of the pull rod 6, the right end of the sector gear 7 is meshed with the gear movement 8, a pointer is provided on the central axis of the gear movement 8, an adjustment mechanism 9 is provided below the threaded joint 3, and a thread is provided on the outside of the adjustment mechanism 9.

[0025] One end of the spring tube 5 is fixed on the connector 4, and the other end can move. When the measured fluid enters the pressure gauge, the spring tube 5 is stretched, and the pull rod 6 will transmit the deformation torque to the fan gear 7, which is meshed with the gear movement 8. The rotation of the fan gear 7 drives the pointer connected to the central axis of the gear movement 8, thereby displaying the pressure value. The spring tube 5 converts the elastic deformation into rotational motion, causing the pointer to deflect to display the pressure. The degree of deformation of the spring tube 5 is proportional to the magnitude of the pressure. A coil spring is connected to the other end of the gear movement 8. When the gear movement 8 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 adjustment mechanism 9 selects different intake ducts according to the temperature of the measured fluid.

[0026] Reference Figure 3 and Figure 4 The regulating mechanism 9 includes a serpentine tube 91, a straight tube 92, a selection component 93, an upper sealing plate 94 and a lower sealing plate 95. The upper sealing plate 94 and the lower sealing plate 95 are arranged inside the regulating mechanism 9. The upper sealing plate 94 is provided with two air holes, which are respectively connected to the serpentine tube 91 and the straight tube 92. The other end of the serpentine tube 91 is connected to the selection component 93, and the other end of the straight tube 92 is connected to the selection component 93. The lower sealing plate 95 is provided with an air hole, which is connected to the selection component 93.

[0027] The measured fluid enters from the air hole of the lower sealing plate 95, and the selection component 93 will open different entry pipes according to different temperatures. The high-temperature fluid will enter the pressure gauge body through the serpentine tube 91, and the normal-temperature fluid will enter the pressure gauge body through the straight tube 92.

[0028] Reference Figure 5 , Figure 6 and Figure 7The selection assembly 93 includes an outer shell 930, a hose 931, a piston 932, a push rod 933, a main valve 934, a return spring 935, a base 936, a lower bracket 937, a bypass valve spring 938 and a bypass valve 939. Paraffin is contained in the hose 931, a piston 932 is provided in the hose 931, the push rod 933 passes through the piston 932 and is connected to the base 936 above, the main valve 934 is provided on the outer shell of the hose 931, the return spring 935 is provided below the main valve 934, the return spring The spring 935 is sleeved on the hose 931, and the lower bracket 937 is installed below the base 936. Part of the hose 931 passes through the lower bracket 937 and is sleeved in the bypass valve spring 938. The bypass valve 939 is provided below the hose 931. The base 936 and the lower bracket 937 are sealed in the outer shell 930. A high-temperature air duct 9301 is opened on one side of the outer shell 930, and a normal-temperature air duct 9302 is opened on the other side of the outer shell 930. An air inlet duct 9303 is provided in the middle of the outer shell 930.

[0029] The base 936 and the lower bracket 937 are fixed and play a fixing role. The base 936 and the lower bracket 937 cannot move during operation. At low temperatures, the hose 931 is held upward by the return spring 935 and is fixed to the base 936 by the push rod 933 passing through the piston 932. The main valve 934 and the base 936 are sealed, and the bypass valve 939 below and the pipe wall of the outer shell 930 are open. At this time, the measured fluid enters from the air inlet 9303 and enters the pressure gauge body from the normal temperature air duct 9302. When encountering high temperature fluid , the paraffin in the hose 931 begins to melt and expand. Under the action of the expansion tension, it will push the piston 932 to move upward. Since the piston 932 is fixed by the push rod 933 and cannot move, the hose 931 will move downward under the action of the reverse thrust. At this time, the main valve 934 is separated from the base 936, and the main valve 934 is fully opened. The downward movement of the hose 931 drives the bypass valve 939 and the pipe wall of the outer shell 930 to be completely closed. At this time, the measured fluid enters from the air inlet 9303 and enters the pressure gauge body from the high-temperature air duct 9301.

[0030] Reference Figure 3 and Figure 6 The high-temperature air duct 9301 is connected to the serpentine tube 91 , the normal-temperature air duct 9302 is connected to the straight-through tube 92 , and the air inlet duct 9303 is connected to the air hole of the lower sealing plate 95 .

[0031] The high-temperature fluid enters from the air inlet 9303, and enters the serpentine tube 91 from the high-temperature gas 9301. The fluid entering the serpentine tube 91 has a longer path and has the function of heat dissipation. The measured fluid after the temperature is reduced enters the pressure gauge body; the normal-temperature fluid enters from the air inlet 9303, enters the straight-through tube 92 from the normal-temperature gas duct 9302, and then enters the pressure gauge body.

[0032] Reference Figure 4 The serpentine tube 91 is made of a high thermal conductivity metal material. The high thermal conductivity metal material has excellent heat dissipation capability and can quickly and conveniently reduce the temperature of the measured fluid.

[0033] Reference Figure 1 A lifting ring is provided on the top of the housing. The lifting ring facilitates the lifting and installation of the pressure gauge, making the operation more convenient.

[0034] Ginseng Figure 2 A sealing rubber ring is provided at the connection between the threaded joint 3 and the adjusting mechanism 9. The sealing rubber ring ensures the air tightness of the pressure gauge.

[0035] Working principle: When the measured fluid is at room temperature, the rubber hose 931 is held upward by the return spring 935, and is fixed to the base 936 by the push rod 933 passing through the piston 932. The main valve 934 and the base 936 are in a sealed state, and the bypass valve 939 below and the tube wall of the outer shell 930 are in an open state. At this time, the measured fluid enters from the air inlet 9303, enters the straight-through pipe 92 from the normal temperature air duct 9302, and then enters the pressure gauge body from the straight-through pipe 92. The spring tube 5 in the pressure gauge body is stretched, and the pull rod 6 will transmit the deformation torque to the fan gear 7, which is meshed with the gear movement 8. The rotation of the fan gear 7 drives the pointer connected to the central axis of the gear movement 8, thereby displaying the pressure value; when the measured fluid is high When the temperature is high, the paraffin in the hose 931 begins to melt and expand. Under the action of the expansion tension, the piston 932 is pushed upward. Since the piston 932 is fixed by the push rod 933 and cannot move, the hose 931 moves downward under the action of the reverse thrust. At this time, the main valve 934 is separated from the base 936, and the main valve 934 is fully opened. The downward movement of the hose 931 drives the bypass valve 939 and the pipe wall of the outer shell 930 to be completely closed. At this time, the measured fluid enters from the air inlet 9303 and enters the pressure serpentine tube 91 from the high-temperature air duct 9301. The serpentine tube 91 is made of heat dissipation material and has a long distance, which can achieve good heat dissipation effect. The fluid with reduced temperature enters the pressure gauge for numerical measurement, thereby protecting the pressure gauge body.

[0036] 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. A high temperature resistant pressure gauge, characterized in that: The watch comprises a watch case (1), a pipe joint (2) is fixedly connected to the bottom of the watch case (1), a threaded joint (3) is provided below the pipe joint (2), a connector (4) is fixed to the upper surface of the pipe joint (2), a spring tube (5) is fixedly connected to one side of the connector (4), a pull rod (6) is hingedly connected to one end of the spring tube (5), one end of the pull rod (6) is connected to a sector gear (7), the right end of the sector gear (7) is meshed with a gear movement (8), a pointer is provided on the central axis of the gear movement (8), an adjustment mechanism (9) is provided below the threaded joint (3), and the adjustment mechanism (9) is provided with threads on the outside.

2. A high temperature resistant pressure gauge according to claim 1, characterized in that: The regulating mechanism (9) comprises a serpentine tube (91), a straight tube (92), a selection component (93), an upper sealing plate (94) and a lower sealing plate (95); the upper sealing plate (94) and the lower sealing plate (95) are arranged inside the regulating mechanism (9); the upper sealing plate (94) is provided with two air holes, the air holes being connected to the serpentine tube (91) and the straight tube (92) respectively; the other end of the serpentine tube (91) is connected to the selection component (93); the other end of the straight tube (92) is connected to the selection component (93); the lower sealing plate (95) is provided with an air hole, the air hole being connected to the selection component (93).

3. A high temperature resistant pressure gauge according to claim 2, characterized in that: The selection assembly (93) includes an outer shell (930), a rubber hose (931), a piston (932), a push rod (933), a main valve (934), a return spring (935), a base (936), a lower bracket (937), a bypass valve spring (938) and a bypass valve (939). The rubber hose (931) is filled with paraffin wax. A piston (932) is provided in the rubber hose (931). The push rod (933) passes through the piston (932) and is connected to the base (936) above. The main valve (934) is provided on the outer shell of the rubber hose (931). The return spring (935) is provided below the main valve (934). The return spring (935) is sleeved on the rubber hose (931), the lower bracket (937) is installed below the base (936), a portion of the rubber hose (931) passes through the lower bracket (937) and is sleeved in the bypass valve spring (938), the bypass valve (939) is provided below the rubber hose (931), the base (936) and the lower bracket (937) are sealed in the outer shell (930), a high-temperature air duct (9301) is provided on one side of the outer shell (930), a normal-temperature air duct (9302) is provided on the other side of the outer shell (930), and an air inlet duct (9303) is provided in the middle of the outer shell (930).

4. A high temperature resistant pressure gauge according to claim 3, characterized in that: The high-temperature air duct (9301) is connected to the serpentine tube (91), the normal-temperature air duct (9302) is connected to the straight-through tube (92), and the air inlet duct (9303) is connected to the air hole of the lower sealing plate (95).

5. A high temperature resistant pressure gauge according to claim 4, characterized in that: The serpentine tube (91) is made of a high thermal conductivity metal material.

6. A high temperature resistant pressure gauge according to claim 1, characterized in that: The top of the watch case (1) is provided with a lifting ring.

7. A high temperature resistant pressure gauge according to claim 1, characterized in that: A sealing rubber ring is provided at the connection between the threaded joint (3) and the adjusting mechanism (9).

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