Metering device verification and calibration device

Abstract

The utility model discloses a metering instrument verification and calibration device, and relates to the technical field of metering instrument verification and calibration. The device comprises a calibration base, the right side of the calibration base is fixedly connected with a shell, the top of the calibration base is fixedly connected with two connecting detection heads, a standard meter is arranged above the connecting detection head located on the left side, and a pressure meter is arranged above the connecting detection head located on the right side. The bottoms of the pressure gauge and the standard gauge are fixedly connected with threaded heads. According to the utility model, through the arrangement of the sealing assembly, specifically during detection and calibration, the inner conical ring is pushed upwards under the action of pressure, the inner conical ring drives the moving pipe to move upwards together, the moving pipe drives the sealing ring I to enter the inner wall of the thread head, and the sealing ring I is in contact with the inner wall of the thread head; therefore, the joint of the thread head and the connection detection head is sealed, gas or liquid is prevented from overflowing from the gap, and the calibration precision is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of measuring instrument verification and calibration, in particular to a measuring instrument verification and calibration device. Background Art

[0002] Verification and calibration of measuring instruments are basic steps to ensure their accuracy, which is crucial for maintaining precision in industrial production, scientific research and other fields. Most measuring instruments are usually pressure gauges.

[0003] In the traditional pressure gauge calibration method, the threaded head at the bottom of the pressure gauge is usually connected to the connecting detection head by thread. This connection method will easily cause a small gap between the two, and the sealing effect is insufficient. Therefore, during the detection process, the internal air pressure or water pressure is likely to overflow from the gap, resulting in a large deviation in the calibration result, affecting the normal use of the pressure gauge. Therefore, we propose a measuring instrument calibration device. Utility Model Content

[0004] The purpose of the utility model is to provide a measuring instrument verification and calibration device, which provides a sealing component. Specifically, during detection and calibration, the inner conical ring is pushed upward under the action of pressure. At this time, the inner conical ring drives the moving tube to move upward together. At this time, the moving tube drives the sealing ring to enter the inner wall of the threaded head. The sealing ring contacts the inner wall of the threaded head, thereby sealing the connection between the threaded head and the connecting detection head, avoiding gas or liquid from overflowing from the gap, improving calibration accuracy, and solving the problem that the threaded head at the bottom of the existing pressure gauge is threadedly connected to the connecting detection head, the sealing effect is insufficient, and the calibration result has a large deviation during the detection process.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The utility model is a measuring instrument verification and calibration device, comprising a calibration base, wherein the right side of the calibration base is fixedly connected to a shell, the top of the calibration base is fixedly connected to two connection detection heads, a standard gauge is provided above the connection detection head on the left, and a pressure gauge is provided above the connection detection head on the right, the bottoms of the pressure gauge and the standard gauge are fixedly connected to threaded heads, and the threaded heads are threadedly connected to the tops of the connection detection heads;

[0007] A sealing assembly is provided inside the connection detection head, and the sealing assembly includes a moving tube, an inner conical ring is fixedly connected to the bottom of the moving tube, a sealing ring 2 is sleeved on the outer side of the inner conical ring, and two sealing rings 1 are sleeved on the outer top of the moving tube.

[0008] Furthermore, the bottom of the inner conical ring is conically set, the top of the inner conical ring is fixedly connected to a spring, the top of the spring is fixedly connected to the inner wall of the connection detection head, the outer sides of the two sealing rings are in contact with the inner wall of the connection detection head, and a limiting groove is provided on the right side of the inner wall of the connection detection head.

[0009] Furthermore, a limiting protrusion is fixedly connected to the right side of the movable tube, the outer side of the limiting protrusion is slidably connected to the inner wall of the limiting groove, the top of the movable tube extends to the inside of the threaded head, and the outer side of the sealing ring contacts the inner wall of the threaded head.

[0010] Furthermore, a motor is fixedly connected to the center of the right side of the shell, an air intake pipe is provided in front of the motor, and a liquid intake pipe is provided behind the motor. The left sides of the air intake pipe and the left side of the liquid intake pipe are both fixedly connected to the right side of the shell.

[0011] Furthermore, a circulation tube is fixedly connected to the inner wall of the calibration base, the right side of the circulation tube is fixedly connected to the inner wall of the shell, a rotating rod is provided inside the circulation tube, a sealing plug and a rotating shaft are fixedly connected to the right side of the rotating rod, and the right side of the rotating shaft is fixedly connected to the left output end of the motor.

[0012] Furthermore, the air inlet pipe and the liquid inlet pipe are interconnected with the circulation pipe, the right side of the sealing plug is adapted to the inner wall of the air inlet pipe and the liquid inlet pipe, the right side of the sealing plug is in contact with the inner wall of the shell, the bottom of the connecting detection head passes through the calibration base and extends to the surface of the circulation pipe for fixed connection, and the bottom of the connecting detection head is interconnected with the circulation pipe.

[0013] The utility model has the following beneficial effects:

[0014] The utility model provides a sealing component. Specifically, during detection and calibration, the inner conical ring is pushed upward under the action of pressure. At this time, the inner conical ring drives the moving tube to move upward together. At this time, the moving tube drives the sealing ring to enter the inner wall of the threaded head. The sealing ring contacts the inner wall of the threaded head, thereby sealing the connection between the threaded head and the connecting detection head, preventing gas or liquid from overflowing from the gap, and improving the calibration accuracy.

[0015] The utility model sets a rotating rod, specifically a starting motor that drives the rotating rod to rotate through a rotating shaft to adjust the position of the sealing plug. When the sealing plug rotates to the air inlet pipe position, the air inlet pipe will be sealed. When the sealing plug moves to the liquid inlet pipe position, the liquid inlet pipe will be sealed. This method can switch between gas and liquid, thereby meeting different calibration requirements.

[0016] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed for the description of the embodiments will be briefly introduced as follows. Obviously, the drawings described below are only some of the embodiments of the present application, and not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0018] Figure 1 It is a whole structure schematic diagram of the present application;

[0019] Figure 2 It is a front cross-sectional structure schematic diagram of the present application connecting detection head;

[0020] Figure 3 It is a whole structure schematic diagram of the present application Figure 2 It is an enlarged structure schematic diagram of the present application A;

[0021] Figure 4 It is a whole structure schematic diagram of the present application moving pipe;

[0022] Figure 5 It is a left cross-sectional structure schematic diagram of the present application calibration base;

[0023] Figure 6 It is a whole structure schematic diagram of the present application rotating rod.

[0024] In the drawings, the component list represented by each number is as follows:

[0025] 1, calibration base; 11, shell; 111, motor; 112, air inlet pipe; 113, liquid inlet pipe; 12, connecting detection head; 13, sealing assembly; 131, moving pipe; 311, sealing ring one; 132, inner conical ring; 321, sealing ring two; 133, spring; 134, limiting bump; 14, flow pipe; 141, rotating rod; 142, sealing plug; 143, rotating shaft; 2, pressure gauge; 21, threaded head; 3, standard gauge. DETAILED DESCRIPTION

[0026] The technical scheme in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, and not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0027] Please refer to Figure 1-6As shown, the utility model is a kind of meter verification and calibration device, including calibration base 1, calibration base 1 right side fixedly connected with shell 11, two connecting detection heads 12 are fixedly connected on the top of calibration base 1, standard table 3 is provided above the left connecting detection head 12, pressure gauge 2 is provided above the right connecting detection head 12, and screw head 21 is fixedly connected at the bottom of pressure gauge 2 and standard table 3, and screw head 21 is screw-connected with the top of connecting detection head 12;

[0028] Connecting detection head 12 is internally provided with sealing assembly 13, sealing assembly 13 includes moving tube 131, and inner conical ring 132 is fixedly connected at the bottom of moving tube 131, sealing ring two 321 is sleeved on the outer side of inner conical ring 132, and two sealing ring one 311 are sleeved on the top of the outer side of moving tube 131, by setting sealing assembly 13, when detecting calibration, inner conical ring 132 is pushed up under the action of pressure, at this time, inner conical ring 132 drives moving tube 131 to move upwards, at this time, moving tube 131 drives sealing ring one 311 to enter the inner wall of screw head 21, then sealing ring one 311 contacts with the inner wall of screw head 21, thereby sealing the connecting place of screw head 21 and connecting detection head 12, avoid gas or liquid overflow from gap, improve calibration accuracy.

[0029] Inner conical ring 132 bottom is conical, spring 133 is fixedly connected at the top of inner conical ring 132, spring 133 top is fixedly connected with the inner wall of connecting detection head 12, sealing ring two 321 outer side contacts with the inner wall of connecting detection head 12, and limit groove is formed in the right side of the inner wall of connecting detection head 12, after calibration, gas or liquid is discharged by pressure relief, at this time, inner conical ring 132 is reset by the elastic action of spring 133, and moving tube 131 is driven to move downwards and reset, so that sealing ring one 311 is separated from screw head 21, and pressure gauge 2 can be disassembled.

[0030] Limiting protrusion 134 is fixedly connected at the right side of moving tube 131, limiting protrusion 134 outer side is slidably connected with the inner wall of limit groove, moving tube 131 top extends to the inside of screw head 21, sealing ring one 311 outer side contacts with the inner wall of screw head 21, and limiting protrusion 134 is used to limit, so that moving tube 131 moves linearly, and the deviation of moving tube 131 is avoided.

[0031] Motor 111 is fixedly connected at the right side center of shell 11, air inlet pipe 112 is arranged in front of motor 111, liquid inlet pipe 113 is arranged behind motor 111, air inlet pipe 112 left side and liquid inlet pipe 113 left side are fixedly connected with the right side of shell 11, and liquid inlet pipe 113 is used for connecting liquid pressure pump, and air inlet pipe 112 is used for connecting gas pressure pump.

[0032] A circulation tube 14 is fixedly connected to the inner wall of the calibration base 1, and the right side of the circulation tube 14 is fixedly connected to the inner wall of the shell 11. A rotating rod 141 is provided inside the circulation tube 14, and a sealing plug 142 and a rotating shaft 143 are fixedly connected to the right side of the rotating rod 141. The right side of the rotating shaft 143 is fixedly connected to the left output end of the motor 111. By setting the rotating rod 141, specifically starting the motor 111 to drive the rotating rod 141 to rotate through the rotating shaft 143, the position of the sealing plug 142 is adjusted. When the sealing plug 142 rotates to the position of the air inlet pipe 112, the air inlet pipe 112 will be sealed. When the sealing plug 142 moves to the position of the liquid inlet pipe 113, the liquid inlet pipe 113 will be sealed. This method can switch between gas and liquid, thereby meeting different calibration requirements.

[0033] The air inlet pipe 112 and the liquid inlet pipe 113 are both interconnected with the circulation pipe 14, and the right side of the sealing plug 142 is adapted to the inner walls of the air inlet pipe 112 and the liquid inlet pipe 113. The right side of the sealing plug 142 contacts the inner wall of the shell 11, and the bottom of the connecting detection head 12 passes through the calibration base 1 and extends to the surface of the circulation pipe 14 for fixed connection. The bottom of the connecting detection head 12 and the circulation pipe 14 are interconnected. When the sealing plug 142 is rotated to the position of the air inlet pipe 112, the air inlet pipe 112 will be sealed. At this time, the liquid inlet pipe 113 can be connected to the liquid to transport the liquid into the circulation pipe 14. When the sealing plug 142 moves to the position of the liquid inlet pipe 113, the liquid inlet pipe 113 will be sealed. At this time, the air inlet pipe 112 can be connected to the air pipe to transport the gas into the circulation pipe 14.

[0034] A specific application of this embodiment is:

[0035] When in use, the pressure gauge 2 is threadedly connected to the top of the connecting detection head 12 through the threaded head 21, and the standard gauge 3 is installed in the same way. Then, the motor 111 is started to drive the rotating shaft 143 to rotate, and the rotating shaft 143 will drive the rotating rod 141 to rotate, and adjust the position of the sealing plug 142. When the sealing plug 142 is rotated to the position of the air inlet pipe 112, the air inlet pipe 112 will be sealed. At this time, the liquid inlet pipe 113 can be connected to the liquid to transport the liquid into the circulation pipe 14. When the sealing plug 142 moves to the position of the liquid inlet pipe 113, the liquid inlet pipe 113 will be sealed. At this time, the air inlet pipe 112 can be connected to the air pipe to transport the gas into the circulation pipe 14. This method can switch between gas and liquid to meet different calibration requirements. When the pressure gauge 2 is calibrated, the gas or liquid in the circulation pipe 14 will enter the connecting detection head 12 and push the inner conical ring 132 upward under the action of pressure. At this time, the inner cone ring 132 The cam 132 is pressed against the spring 133 to release the spring 133, and the cam 132 is pressed against the spring 133 to release the spring 133. The cam 132 is pressed against the spring 133 to release the spring 133. The cam 132 is pressed against the spring 133 to release the spring 133.

[0036] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0037] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A measuring instrument calibration device, comprising a calibration base (1), wherein the right side of the calibration base (1) is fixedly connected to a housing (11), the top of the calibration base (1) is fixedly connected to two connection detection heads (12), a standard gauge (3) is arranged above the connection detection head (12) on the left, and a pressure gauge (2) is arranged above the connection detection head (12) on the right, the pressure gauge (2) and the standard gauge (3) are fixedly connected to the bottom of the screw head (21), and the screw head (21) is threadedly connected to the top of the connection detection head (12), characterized in that ； A sealing assembly (13) is provided inside the connection detection head (12), and the sealing assembly (13) comprises a moving tube (131), an inner conical ring (132) is fixedly connected to the bottom of the moving tube (131), a second sealing ring (321) is sleeved on the outer side of the inner conical ring (132), and two first sealing rings (311) are sleeved on the outer top of the moving tube (131).

2. A measuring instrument verification and calibration device according to claim 1, characterized in that: The bottom of the inner conical ring (132) is conical, and the top of the inner conical ring (132) is fixedly connected to a spring (133). The top of the spring (133) is fixedly connected to the inner wall of the connection detection head (12). The outer side of the second sealing ring (321) contacts the inner wall of the connection detection head (12), and a limiting groove is provided on the right side of the inner wall of the connection detection head (12).

3. A measuring instrument verification and calibration device according to claim 2, characterized in that: The right side of the movable tube (131) is fixedly connected to a limiting protrusion (134), the outer side of the limiting protrusion (134) is slidably connected to the inner wall of the limiting groove, the top of the movable tube (131) extends to the inside of the threaded head (21), and the outer side of the sealing ring (311) contacts the inner wall of the threaded head (21).

4. A measuring instrument verification and calibration device according to claim 3, characterized in that: A motor (111) is fixedly connected to the center of the right side of the housing (11), an air intake pipe (112) is provided in front of the motor (111), and a liquid intake pipe (113) is provided behind the motor (111), and the left side of the air intake pipe (112) and the left side of the liquid intake pipe (113) are both fixedly connected to the right side of the housing (11).

5. A measuring instrument verification and calibration device according to claim 4, characterized in that: A flow tube (14) is fixedly connected to the inner wall of the calibration base (1), the right side of the flow tube (14) is fixedly connected to the inner wall of the housing (11), a rotating rod (141) is provided inside the flow tube (14), a sealing plug (142) and a rotating shaft (143) are fixedly connected to the right side of the rotating rod (141), and the right side of the rotating shaft (143) is fixedly connected to the left output end of the motor (111).

6. A measuring instrument verification and calibration device according to claim 5, characterized in that: The air inlet pipe (112) and the liquid inlet pipe (113) are both connected to the circulation pipe (14), the right side of the sealing plug (142) is adapted to the inner walls of the air inlet pipe (112) and the liquid inlet pipe (113), and the right side of the sealing plug (142) is in contact with the inner wall of the housing (11).

7. The measuring instrument verification and calibration device according to claim 5, characterized in that: The bottom of the connection detection head (12) passes through the calibration base (1) and extends to the surface of the circulation tube (14) for fixed connection, and the bottom of the connection detection head (12) and the circulation tube (14) are interconnected.

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