Trace standard gas adjusting device

Abstract

The utility model discloses a trace standard gas adjusting device which comprises a pressure reducing valve, a connecting lantern ring structure is assembled on the outer wall of the output end of the pressure reducing valve, the input end of the connecting lantern ring structure is in threaded connection with a detection pressure gauge, and a spring pressure adjusting structure is assembled at the upper end of the pressure reducing valve and comprises internal threads formed in the inner wall of the upper end of the pressure reducing valve. A round rod penetrates through the middle of the upper end face of the pressure reducing valve, the lower end of the round rod is fixedly assembled in the middle of the upper surface of the pressing plate, and an operation handle is fixedly assembled at the upper end of the round rod. The pressure of the control spring of the pressure reducing valve is adjusted through the spring pressure adjusting structure which is more convenient to operate and control, and numerical value display on the detection pressure gauge is matched, so that the standard gas flow can be more conveniently and accurately controlled, large deviation of calibration data of the analyzer is avoided, and a small amount of standard gas can be controlled to enter the analyzer; the waste of a large amount of standard gas is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of standard gas regulating devices, in particular to a trace standard gas regulating device. Background Art

[0002] The standard gas pressure reducing valve is a special device that automatically reduces the working pressure of the pipeline. It can reduce the higher gas pressure in the pipeline before the valve to the required level of the pipeline after the valve. It is currently widely used in various laboratories.

[0003] The standard gas pressure reducing valve that is currently most widely used in laboratories achieves the purpose of pressure reduction by changing the throttling area, which changes the flow rate and function of the fluid, resulting in different pressure losses. Then, it relies on control and regulation to balance the fluctuation of the pressure behind the valve with the spring force, so that the pressure behind the valve remains stable within a certain error range.

[0004] However, the existing standard gas pressure reducing valve cannot accurately control the flow rate, which on the one hand causes large deviations in the calibration data of the analyzer. On the other hand, since the analyzer only needs a small amount of standard gas, the current gas pressure reducing valve cannot accurately control the flow rate, resulting in a large amount of standard gas waste.

[0005] Therefore, it is necessary to design a practical and more convenient spring pressure regulating structure to adjust the pressure of the control spring of the pressure reducing valve, and to detect the numerical display on the pressure gauge to control the standard gas flow more conveniently and accurately, so as to avoid large deviations in the calibration data of the analyzer. It is also necessary to have a trace standard gas regulating device that can control a small amount of standard gas to enter the analyzer and avoid a large amount of standard gas waste. Utility Model Content

[0006] The utility model aims to provide a trace standard gas regulating device to solve the problems raised in the above background technology.

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions: a trace standard gas regulating device, including a pressure reducing valve, the outer wall of the output end of the pressure reducing valve is equipped with a connecting collar structure, the input end of the connecting collar structure is screwed with a detection pressure gauge, and the lower end of the detection pressure gauge is connected to the inside of the output end of the pressure reducing valve, the upper end of the pressure reducing valve is equipped with a spring pressure regulating structure, the spring pressure regulating structure includes an internal thread opened on the inner wall of the upper end of the pressure reducing valve, a pressure plate is screwed on the internal thread, and the bottom surface of the pressure plate abuts against the upper end of the control spring of the pressure reducing valve, a round rod passes through the middle of the upper end surface of the pressure reducing valve, the lower end of the round rod is fixedly assembled on the middle of the upper surface of the pressure plate, and the upper end of the round rod is fixedly assembled with an operating handle.

[0008] According to the above technical solution, the operating handle is in the shape of an elongated strip, and the end of the operating handle is in the shape of an arc, and the front and rear side walls of the operating handle are evenly and longitudinally provided with strip grooves.

[0009] According to the above technical solution, scales are evenly arranged on the edge of the upper end surface of the pressure reducing valve.

[0010] According to the above technical solution, the connecting ring structure includes a ring fixedly sleeved on the outer wall of the output end of the pressure reducing valve, a threaded through hole is opened between the upper surface of the ring and the upper surface of the output end of the pressure reducing valve, the lower end of the detection pressure gauge is screwed into the threaded through hole, a sealing ring is embedded in the middle of the inner wall of the threaded through hole, and the inner ring surface of the sealing ring is wrapped around the outer wall of the lower end of the detection pressure gauge.

[0011] According to the above technical solution, the detection pressure gauge includes a dial, a connecting pipe is fixedly connected to the middle of the bottom surface of the dial, an externally threaded pipe is fixedly connected to the middle of the bottom surface of the connecting pipe, and the externally threaded pipe is threaded into the threaded through hole, a stepped table is formed between the bottom surface of the connecting pipe and the upper end of the externally threaded pipe, and a rubber layer is glued and fixed to the bottom surface of the stepped table, and the bottom surface of the rubber layer is against the upper surface of the ring.

[0012] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0013] The utility model adjusts the pressure of the control spring of the pressure reducing valve through a spring pressure regulating structure which is more convenient to operate, and cooperates with the numerical display on the detection pressure gauge to more conveniently and accurately control the flow rate of the standard gas, thereby avoiding large deviations in the calibration data of the analyzer, and can control a small amount of standard gas to enter the analyzer, thereby avoiding a large waste of standard gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the connecting collar structure and the spring pressure regulating structure of the utility model;

[0017] Figure 3 It is a schematic diagram of the structure of the detection pressure gauge of the utility model.

[0018] In the figure: 1-pressure reducing valve, 2-connecting collar structure, 21-collar, 22-threaded through hole, 23-sealing ring, 3-detection pressure gauge, 31-dial, 32-connecting pipe, 33-external threaded pipe, 34-rubber layer, 4-spring pressure regulating structure, 41-internal thread, 42-pressing plate, 43-round rod, 44-operating handle, 5-scale, 6-bar groove. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-3 The utility model provides a technical solution: a trace standard gas regulating device, including a pressure reducing valve 1, a connecting collar structure 2 is mounted on the outer wall of the output end of the pressure reducing valve 1, a detection pressure gauge 3 is screwed on the input end of the connecting collar structure 2, and the lower end of the detection pressure gauge 3 is connected to the output end of the pressure reducing valve 1, and a spring pressure regulating structure 4 is mounted on the upper end of the pressure reducing valve 1, the spring pressure regulating structure 4 includes an internal thread 41 provided on the inner wall of the upper end of the pressure reducing valve 1, a pressure plate 42 is screwed on the internal thread 41, and the bottom surface of the pressure plate 42 abuts against the upper end of the control spring of the pressure reducing valve 1, a round rod 43 passes through the middle of the upper end surface of the pressure reducing valve 1, the lower end of the round rod 43 is fixedly mounted on the middle of the upper surface of the pressure plate 42, and an operating handle 44 is fixedly mounted on the upper end of the round rod 43; the round rod 43 and the pressure plate 42 are driven to rotate by rotating the operating handle 44, and the pressure plate 42 spirally squeezes the control spring downward to compress, thereby adjusting the flow of the pressure reducing valve 1.

[0021] By adjusting the pressure of the control spring of the pressure reducing valve through the spring pressure regulating structure 4 which is more convenient to operate, and cooperating with the numerical display on the detection pressure gauge 3, the flow rate of the standard gas can be controlled more conveniently and accurately to avoid large deviations in the calibration data of the analyzer, and a small amount of standard gas can be controlled to enter the analyzer to avoid a large amount of waste of standard gas.

[0022] Specifically, the operating handle 44 is in an elongated strip shape, and the end of the operating handle 44 is in an arc shape. The front and rear side walls of the operating handle 44 are uniformly and longitudinally provided with strip grooves 6 .

[0023] like Figure 1 As described above, the operating handle 44 is in the shape of an elongated strip, and the overall shape is streamlined for easy gripping. The strip grooves 6 evenly arranged longitudinally on the front and rear side walls increase the gripping friction and make it more convenient to control the spring pressure adjustment structure 4.

[0024] Specifically, scales 5 are evenly arranged at the edge of the upper end surface of the pressure reducing valve 1; the scales 5 are evenly distributed at the edge of the upper end surface of the pressure reducing valve 1, and are used as reference values ​​for the rotation angle of the operating handle 44, so as to more conveniently and accurately control the standard gas flow.

[0025] Specifically, the connecting ring structure 2 includes a ring 21 fixedly sleeved on the outer wall of the output end of the pressure reducing valve 1, and a threaded through hole 22 is opened between the upper surface of the ring 21 and the upper surface of the output end of the pressure reducing valve 1. The lower end of the detection pressure gauge 3 is screwed into the threaded through hole 22, and a sealing ring 23 is embedded in the middle of the inner wall of the threaded through hole 22. The inner ring surface of the sealing ring 23 is wrapped around the outer wall of the lower end of the detection pressure gauge 3.

[0026] The detection pressure gauge 3 is dropped and screwed into the threaded through hole 22. The detection pressure gauge 3 designed in this way is convenient for disassembly and installation, and is convenient for maintenance. The lower end of the detection pressure gauge 3 and the threaded through hole 22 are sealed by a sealing ring 23 to avoid air leakage, thereby ensuring the accuracy of the detection of the detection pressure gauge 3.

[0027] Specifically, the detection pressure gauge 3 includes a dial 31, a connecting pipe 32 is fixedly connected to the middle of the bottom surface of the dial 31, an externally threaded pipe 33 is fixedly connected to the middle of the bottom surface of the connecting pipe 32, and the externally threaded pipe 33 is screwed into the threaded through hole 22, a stepped table is formed between the bottom surface of the connecting pipe 32 and the upper end of the externally threaded pipe 33, and a rubber layer 34 is glued and fixed to the bottom surface of the stepped table, and the bottom surface of the rubber layer 34 abuts against the upper surface of the ring 21; the rubber layer 34 is designed to seal the gap between the upper end of the threaded through hole 22 and the externally threaded pipe 33, thereby further improving the airtightness between the externally threaded pipe 33 and the threaded through hole 22.

[0028] Working principle:

[0029] The utility model adjusts the pressure of the control spring of the pressure reducing valve through the spring pressure regulating structure 4 which is more convenient to operate, and cooperates with the numerical display on the detection pressure gauge 3 to more conveniently and accurately control the flow of the standard gas, thereby avoiding large deviations in the calibration data of the analyzer, and can control a small amount of standard gas to enter the analyzer, thereby avoiding a large waste of standard gas; the spring pressure regulating structure 4 drives the round rod 43 and the pressure plate 42 to rotate by rotating the operating handle 44, and the pressure plate 42 spirally squeezes the control spring downward to compress, thereby adjusting the flow of the pressure reducing valve 1;

[0030] In this embodiment, Figure 1 The operating handle 44 is long and streamlined in shape for easy gripping. The strip grooves 6 evenly arranged longitudinally on the front and rear side walls increase the gripping friction and make it easier to control the spring pressure regulating structure 4. The scales 5 are evenly distributed on the edge of the upper end surface of the pressure reducing valve 1 and are used as reference values ​​for the rotation angle of the operating handle 44, so as to more conveniently and accurately control the flow rate of the standard gas.

[0031] The detection pressure gauge 3 is dropped and screwed into the threaded through hole 22. The detection pressure gauge 3 designed in this way is convenient for disassembly and installation, and is easy to carry out maintenance. The lower end of the detection pressure gauge 3 and the threaded through hole 22 are sealed by the sealing ring 23 to avoid air leakage, thereby ensuring the accuracy of the detection of the detection pressure gauge 3. The rubber layer 34 on the bottom surface of the stepped table of the detection pressure gauge 3 is used to seal the gap between the upper end of the threaded through hole 22 and the external threaded tube 33, thereby further improving the airtightness between the external threaded tube 33 and the threaded through hole 22.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A trace standard gas regulating device, characterized in that: The invention comprises a pressure reducing valve (1), wherein the outer wall of the output end of the pressure reducing valve (1) is equipped with a connecting collar structure (2), the input end of the connecting collar structure (2) is screwed with a detection pressure gauge (3), and the lower end of the detection pressure gauge (3) is connected to the inside of the output end of the pressure reducing valve (1), the upper end of the pressure reducing valve (1) is equipped with a spring pressure regulating structure (4), the spring pressure regulating structure (4) comprises an internal thread (41) provided on the inner wall of the upper end of the pressure reducing valve (1), a pressure plate (42) is screwed on the internal thread (41), and the bottom surface of the pressure plate (42) abuts against the upper end of the control spring of the pressure reducing valve (1), a round rod (43) passes through the middle of the upper end surface of the pressure reducing valve (1), the lower end of the round rod (43) is fixedly assembled to the middle of the upper surface of the pressure plate (42), and the upper end of the round rod (43) is fixedly assembled with an operating handle (44).

2. A trace calibration gas regulating device according to claim 1, characterized in that: The operating handle (44) is in the shape of an elongated strip, and the end of the operating handle (44) is in the shape of an arc. The front and rear side walls of the operating handle (44) are evenly and longitudinally provided with strip grooves (6).

3. A trace calibration gas regulating device according to claim 2, characterized in that: Scales (5) are evenly arranged on the edge of the upper end surface of the pressure reducing valve (1).

4. A trace calibration gas regulating device according to claim 1, characterized in that: The connecting collar structure (2) comprises a collar (21) fixedly sleeved on the outer wall of the output end of the pressure reducing valve (1); a threaded through hole (22) is provided between the upper surface of the collar (21) and the upper surface of the output end of the pressure reducing valve (1); the lower end of the detection pressure gauge (3) is screwed into the threaded through hole (22); a sealing ring (23) is embedded in the middle of the inner wall of the threaded through hole (22); the inner ring surface of the sealing ring (23) is wrapped around the outer wall of the lower end of the detection pressure gauge (3).

5. A trace calibration gas regulating device according to claim 4, characterized in that: The detection pressure gauge (3) comprises a dial (31), a connecting pipe (32) is fixedly connected to the middle of the bottom surface of the dial (31), an externally threaded pipe (33) is fixedly connected to the middle of the bottom surface of the connecting pipe (32), and the externally threaded pipe (33) is screwed into the threaded through hole (22), a stepped table is formed between the bottom surface of the connecting pipe (32) and the upper end of the externally threaded pipe (33), and a rubber layer (34) is glued and fixed to the bottom surface of the stepped table, and the bottom surface of the rubber layer (34) abuts against the upper surface of the collar (21).

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