CN219570959U - Gas quantitative device - Google Patents

Abstract

The utility model discloses a gas quantitative device, which comprises: a body; the first valve bank and the second valve bank are both arranged on the body; the quantitative channel is communicated between the first valve bank and the second valve bank, the first valve bank and the second valve bank are communicated with the first gas pipeline, the first valve bank and the second valve bank are communicated with the second gas pipeline, and the first gas pipeline is communicated with the quantitative channel or the second gas pipeline is communicated with the quantitative channel through the cooperation of the first valve bank and the second valve bank. Therefore, the gas quantifying device can mix the quantified preset gas in the quantifying channel with the target gas in the second gas pipeline, and has the advantages of low cost, simple structure, low probability of failure and low maintenance difficulty compared with the prior art.

Description

Gas quantitative device

Technical Field

The utility model relates to the field of detection equipment, in particular to a gas quantifying device.

Background

In the related art, during the test (taking a dynamic specific surface area test as an example), a preset gas (such as nitrogen) with accurate quantification needs to be injected into a target gas (such as a certain mixed gas), a six-way valve is commonly used in the prior art as a quantifying mechanism of a gas quantifying device, the cost of the six-way valve is high, the cost of the gas quantifying device is increased, the structure of the six-way valve is complex, the six-way valve is easy to break down, and the maintenance difficulty is high.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present utility model is to provide a gas quantifying device, which has low cost, simple structure, low probability of failure and low maintenance difficulty.

The gas quantifying device according to the present utility model comprises: a body; the first valve bank and the second valve bank are both arranged on the body; the quantitative channel is communicated between the first valve bank and the second valve bank, the first valve bank and the second valve bank are communicated with a first gas pipeline, the first valve bank and the second valve bank are communicated with a second gas pipeline, and the first gas pipeline is selectively communicated with the quantitative channel or the second gas pipeline is communicated with the quantitative channel through the cooperation of the first valve bank and the second valve bank.

According to the gas quantifying device, the quantified preset gas in the quantifying channel and the target gas in the second gas pipeline can be mixed, and compared with the prior art, the gas quantifying device is low in cost, simple in structure, low in fault probability and low in maintenance difficulty.

In some examples of the utility model, the first gas line comprises a first gas inlet line and a first gas outlet line, the second gas line comprises a second gas inlet line and a second gas outlet line, the first valve block is in communication with the first gas inlet line, the second valve block is in communication with the first gas outlet line, the first valve block is in communication with one of the second gas inlet line and the second gas outlet line, and the second valve block is in communication with the other of the second gas inlet line and the second gas outlet line.

In some examples of the utility model, the first valve block has a first valve port in communication with the first inlet conduit, a second valve port in communication with one of the second inlet conduit or the second outlet conduit, and a third valve port; the second valve group is provided with a fourth valve port, a fifth valve port and a sixth valve port, the fourth valve port is communicated with the first air outlet pipeline, the sixth valve port is communicated with the other of the second air inlet pipeline or the second air outlet pipeline, and the quantitative channel is communicated with the second valve port and the fifth valve port.

In some examples of the utility model, the first valve block and the second valve block each comprise a three-way valve.

In some examples of the utility model, the first valve block further has a seventh valve port, the second valve block further has an eighth valve port, the seventh valve port communicates with the eighth valve port, the seventh valve port selectively communicates with the first valve port or the third valve port, and the eighth valve port selectively communicates with the fourth valve port or the sixth valve port.

In some examples of the utility model, the first valve block comprises one four-way valve or two-way valves, and the second valve block comprises one four-way valve or two-way valves.

In some examples of the utility model, the first valve block and/or the second valve block are configured as diaphragm valve blocks.

In some examples of the utility model, the second gas line further comprises: and the communication pipeline is communicated with the second air inlet pipeline and the second air outlet pipeline.

In some examples of the utility model, the gas dosing device further comprises: the body is provided with a first groove body, and the first cover body is arranged on the body and seals the open end of the first groove body to form the quantitative channel.

In some examples of the utility model, at least part of the first gas line and/or at least part of the second gas line is provided within the body.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic illustration of a first gas line in communication with a dosing passageway when the first valve block and the second valve block each comprise a three-way valve according to an embodiment of the present utility model;

FIG. 2 is a schematic illustration of the embodiment of FIG. 1 with a second gas line in communication with the dosing channel;

FIG. 3 is another schematic illustration of the first gas line in communication with the dosing channel when the first valve block and the second valve block each comprise a three-way valve according to an embodiment of the present utility model;

FIG. 4 is a schematic illustration of the embodiment of FIG. 3 with a second gas line in communication with the dosing channel;

FIG. 5 is a schematic illustration of a first gas line in communication with a dosing channel when the first valve block and the second valve block each comprise a four-way valve according to an embodiment of the present utility model;

FIG. 6 is a schematic illustration of the embodiment of FIG. 5 with a second gas line in communication with the dosing channel;

FIG. 7 is a schematic illustration of a first gas line in communication with a dosing channel when both the first valve block and the second valve block include two-way valves according to an embodiment of the present utility model;

FIG. 8 is a schematic illustration of the embodiment of FIG. 7 wherein a second gas line is in communication with the dosing channel;

FIG. 9 is a schematic diagram of a detection apparatus according to an embodiment of the present utility model;

FIG. 10 is a schematic view of a gas metering apparatus according to an embodiment of the present utility model;

FIG. 11 is a perspective view of a gas metering apparatus according to an embodiment of the present utility model;

FIG. 12 is a schematic view of another angle of a gas metering apparatus according to an embodiment of the present utility model;

FIG. 13 is a schematic view of the gas metering apparatus of FIG. 12 with a second cover not shown;

fig. 14 is a schematic view of the gas dosing device of fig. 12, without showing the first and second covers.

Reference numerals:

a detection device 200; a gas quantitative device 100;

a body 10; a dosing channel 11; a first tank 12; a second tank 13; a target gas inlet 14; a connecting flange 15; a seal 16;

a first valve group 20; a first valve port 21; a second valve port 22; a third valve port 23; a seventh valve port 24;

a three-way valve 25; a four-way valve 26; a two-way valve 27;

A second valve block 30; fourth valve port 31; fifth valve port 32; a sixth valve port 33; an eighth valve port 34;

a first gas line 40; a first intake line 41; a first outlet line 42;

a second gas line 50; a second air intake line 51; a second outlet line 52; a communication pipe 53;

a first cover 60; a second cover 61; a first conduit 62; a second line 63;

and the conduit 70 is conducted.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

A gas metering apparatus 100 according to an embodiment of the present utility model is described below with reference to fig. 1 to 14.

As shown in fig. 1 to 14, a gas quantifying device 100 according to an embodiment of the present utility model includes: the body 10, the first valve block 20, the second valve block 30 and the dosing channel 11.

Wherein, the first valve group 20 and the second valve group 30 are both mounted on the body 10, and as some alternative embodiments of the present utility model, the first valve group 20 and the second valve group 30 may be mounted on the body 10 by, but not limited to, screwing, clamping, etc. The quantitative channel 11 is communicated between the first valve group 20 and the second valve group 30, namely, the quantitative channel 11 is communicated between the first valve group 20 and the second valve group 30, the first valve group 20 is communicated with the first gas pipeline 40, the second valve group 30 is communicated with the first gas pipeline 40, the first valve group 20 is communicated with the second gas pipeline 50, and the second valve group 30 is communicated with the second gas pipeline 50. By the cooperation of the first valve block 20 and the second valve block 30, it is possible to selectively communicate the first gas line 40 with the dosing channel 11 or the second gas line 50 with the dosing channel 11. That is, by the first valve group 20 and the second valve group 30 being mated, the first gas line 40 can be made to communicate with the dosing passage 11, or the second gas line 50 can be made to communicate with the dosing passage 11.

As some alternative embodiments of the present application, both the first valve block 20 and the second valve block 30 may be connected to a controller, for example, both the first valve block 20 and the second valve block 30 may be electrically connected to a controller, or both the first valve block 20 and the second valve block 30 may be communicatively connected to a controller, which may be used to control the first valve block 20 and the second valve block 30 to communicate the first gas line 40 or the second gas line 50 with the dosing channel 11.

As some alternative embodiments of the present application, a preset gas (such as nitrogen) may be circulated in the first gas line 40, and when the first gas line 40 is in communication with the dosing channel 11, the preset gas in the first gas line 40 may flow into the first valve group 20 and flow out of the second valve group 30, specifically, the preset gas in the first gas line 40 may flow into the first valve group 20, the dosing channel 11, and the second valve group 30 in sequence. Wherein the first gas line 40 may be a segmented line, one segment may be in direct communication with the first valve block 20 and another segment may be in direct communication with the second valve block 30.

The second gas line 50 may be configured to be capable of flowing a target gas (for example, a certain mixed gas), and by the first valve block 20 being matched with the second valve block 30, the dosing channel 11 may be adjusted from a state of being in communication with the first gas line 40 to a state of being in communication with the second gas line 50, the target gas in the second gas line 50 may flow into the first valve block 20 and flow out of the second valve block 30, specifically, the target gas in the second gas line 50 may flow into the first valve block 20, the dosing channel 11, and the second valve block 30 in order, wherein the second gas line 50 may be a segmented line, one segment of which may be in direct communication with the first valve block 20, and the other segment of which may be in direct communication with the second valve block 30. When the target gas in the second gas line 50 flows into the quantitative passage 11, the preset gas in the quantitative passage 11 can be mixed into the target gas (when explanation is required, the preset gas in the quantitative passage 11 is that the first gas line 40 is communicated with the quantitative passage 11, the target gas flows into the quantitative passage 11 from the first gas line 40), so that the quantitative preset gas in the quantitative passage 11 and the target gas in the second gas line 50 can be mixed. Since the volume of the quantitative passage 11 is a constant value, the amount of the predetermined gas in the quantitative passage 11 is quantitative.

Compared with the technical scheme of using a six-way valve as a quantifying mechanism in the prior art, the gas quantifying device 100 is low in cost, beneficial to saving cost, simple in structure, low in probability of failure and low in maintenance difficulty.

It should be noted that the gas quantifying device 100 of the present utility model may be used for, but not limited to, dynamic specific surface area measurement, the preset gas described in the present utility model is not limited to nitrogen, the preset gas described in the present utility model may be, but not limited to, hydrogen, oxygen, etc., the target gas described in the present utility model may be a mixed gas, or may be a single gas, and the target gas described in the present utility model may be, but not limited to, nitrogen, hydrogen, oxygen, or may be any mixed gas of nitrogen, hydrogen, oxygen.

Thus, the gas quantifying device 100 of the present utility model can mix the quantified preset gas in the quantifying channel 11 with the target gas in the second gas line 50, and compared with the prior art, the gas quantifying device 100 of the present utility model has low cost, simple structure, low probability of failure, and low maintenance difficulty.

In some embodiments of the present utility model, as shown in fig. 1-8 and 11, the first gas line 40 may include a first gas inlet line 41 and a first gas outlet line 42, the second gas line 50 may include a second gas inlet line 51 and a second gas outlet line 52, wherein the first valve block 20 may be disposed in communication with the first gas inlet line 41, the second valve block 30 may be disposed in communication with the first gas outlet line 42, the first valve block 20 may be disposed in communication with one of the second gas inlet line 51, the second gas outlet line 52, and the second valve block 30 may be disposed in communication with the other of the second gas inlet line 51, the second gas outlet line 52.

As some alternative embodiments of the present application, as shown in fig. 1, 2, and 5-8, the first valve block 20 may be disposed in communication with the second inlet line 51, and the second valve block 30 may be disposed in communication with the second outlet line 52. As some alternative embodiments of the present application, as shown in fig. 3 and 4, the first valve group 20 may be disposed in communication with the second outlet pipe 52, and the second valve group 30 may be disposed in communication with the second inlet pipe 51.

The present application will be described taking the example of the first valve group 20 being disposed in communication with the second inlet pipe 51 and the second valve group 30 being disposed in communication with the second outlet pipe 52.

Specifically, when the first gas line 40 communicates with the dosing channel 11, a preset gas (e.g., nitrogen gas) may flow from the first gas inlet line 41 into the first gas outlet line 42 through the first valve group 20, the dosing channel 11, and the second valve group 30 in this order, and a target gas (e.g., a certain mixed gas) may flow from the second gas inlet line 51 into the second gas outlet line 52.

By the cooperation of the first valve group 20 and the second valve group 30, the second gas pipe 50 can be made to communicate with the dosing channel 11, in which state the target gas (for example, a certain mixed gas) can flow from the second gas inlet pipe 51 into the second gas outlet pipe 52 through the first valve group 20, the dosing channel 11, the second valve group 30 in this order, when the target gas flows from the second gas inlet pipe 51 into the dosing channel 11, the preset gas in the dosing channel 11 can be mixed into the target gas, and the mixed gas can flow into the second gas outlet pipe 52 to leave the gas dosing device 100 from the second gas outlet pipe 52. The arrangement can make the arrangement of the pipelines of the gas quantitative device 100 reasonable, and make the structure form of the gas quantitative device 100 reasonable.

In some embodiments of the present utility model, as shown in fig. 1-8, the first valve block 20 may have a first valve port 21, a second valve port 22, and a third valve port 23, wherein the first inlet line 41 may communicate with the first valve port 21, the third valve port 23 may communicate with one of the second inlet line 51 or the second outlet line 52, the second valve block 30 may have a fourth valve port 31, a fifth valve port 32, and a sixth valve port 33, the first outlet line 42 may communicate with the fourth valve port 31, the sixth valve port 33 may communicate with the other of the second inlet line 51 or the second outlet line 52, and the dosing channel 11 may communicate with the second valve port 22 and the fifth valve port 32.

As some alternative embodiments of the present utility model, as shown in fig. 1, 2, and 5-8, the third valve port 23 of the first valve group 20 may be disposed in communication with the second air inlet line 51, and the sixth valve port 33 of the second valve group 30 may be disposed in communication with the second air outlet line 52. As some alternative embodiments of the present utility model, as shown in fig. 3 and 4, the third valve port 23 of the first valve block 20 may be disposed in communication with the second outlet gas line 52, and the sixth valve port 33 of the second valve block 30 may be disposed in communication with the second inlet gas line 51.

The present utility model will be described taking the example in which the third valve port 23 of the first valve group 20 is disposed in communication with the second air inlet pipe 51, and the sixth valve port 33 of the second valve group 30 is disposed in communication with the second air outlet pipe 52.

Specifically, the controller may control the first valve group 20 so that the first valve port 21 and the second valve port 22 of the first valve group 20 communicate, and the controller may control the second valve group 30 so that the fourth valve port 31 and the fifth valve port 32 of the second valve group 30 communicate, in which state the first gas line 40 communicates with the dosing passageway 11, in other words, the first gas inlet line 41, the dosing passageway 11, and the first gas outlet line 42 communicate in this order. The preset gas (e.g., nitrogen) may flow from the first inlet line 41 through the first valve port 21 into the first valve block 20 and from the second valve port 22 of the first valve block 20 into the dosing passageway 11, and then the preset gas (e.g., nitrogen) may flow into the first outlet line 42 through the fifth valve port 32 and the fourth valve port 31 of the second valve block 30 in sequence. Also, a target gas (e.g., a certain mixed gas) may flow from the second inlet pipe 51 into the second outlet pipe 52.

The controller may control the first valve group 20 to communicate the third valve port 23 and the second valve port 22 of the first valve group 20 to block the first valve port 21 and the second valve port 22 of the first valve group 20, and the controller may control the second valve group 30 to communicate the sixth valve port 33 and the fifth valve port 32 of the second valve group 30 to block the fourth valve port 31 and the fifth valve port 32 of the second valve group 30, in which state the second gas line 50 communicates with the dosing passageway 11, the first gas line 40 blocks with the dosing passageway 11, in other words, the second gas inlet line 51, the dosing passageway 11, and the second gas outlet line 52 communicate in sequence, and the first gas inlet line 41, the dosing passageway 11, and the first gas outlet line 42 block. Target gas (e.g., a certain mixed gas) may flow from the second inlet line 51 into the first valve block 20 through the third valve port 23 and from the second valve port 22 of the first valve block 20 into the dosing channel 11, and then target gas (e.g., a certain mixed gas) may flow into the second outlet line 52 through the fifth valve port 32, the sixth valve port 33 of the second valve block 30 in sequence. The quantitative preset gas and the target gas in the quantitative channel 11 can be mixed only by arranging the first valve group 20 and the second valve group 30 with three valve ports, so that the structure of the gas quantitative device 100 is simple, the probability of failure of the gas quantitative device 100 can be reduced, and the cost of the gas quantitative device 100 is reduced.

In some embodiments of the present utility model, as shown in fig. 1-4, each of the first and second valve banks 20 and 30 may include one three-way valve 25, that is, the first valve bank 20 may include one three-way valve 25, the first valve bank 20 may include three-way valve 25 having first, second and third ports 21, 22 and 23, the second valve bank 30 may include one three-way valve 25, and the second valve bank 30 may include three-way valve 25 having fourth, fifth and sixth ports 31, 32 and 33. By this arrangement, the predetermined gas and the target gas in the quantitative passage 11 can be mixed by the two three-way valves 25, so that the structure of the gas quantitative device 100 can be made simpler, and the cost of the gas quantitative device 100 can be reduced more advantageously.

In some embodiments of the present utility model, as shown in fig. 4-8, the first valve block 20 may further have a seventh valve port 24, the second valve block 30 may further have an eighth valve port 34, the seventh valve port 24 may be in communication with the eighth valve port 34, alternatively, the seventh valve port 24 and the eighth valve port 34 may be in communication through a pipe, the seventh valve port 24 may be in communication with the first valve port 21 or the third valve port 23, that is, the seventh valve port 24 may be in communication with the first valve port 21 or the third valve port 23, and the eighth valve port 34 may be in communication with the fourth valve port 31 or the sixth valve port 33, that is, the eighth valve port 34 may be in communication with the fourth valve port 31 or the sixth valve port 33.

As some alternative embodiments of the present application, as shown in fig. 5 and 6, the controller may control the first valve block 20 to communicate the first valve port 21 and the second valve port 22 of the first valve block 20 to communicate the third valve port 23 and the seventh valve port 24 of the first valve block 20, and the controller may control the second valve block 30 to communicate the fourth valve port 31 and the fifth valve port 32 of the second valve block 30 to communicate the sixth valve port 33 and the eighth valve port 34 of the second valve block 30. In this state, the first air inlet pipe 41, the dosing passageway 11, and the first air outlet pipe 42 are communicated in this order. The preset gas (e.g., nitrogen) may flow from the first inlet line 41 through the first valve port 21 into the first valve block 20 and from the second valve port 22 of the first valve block 20 into the dosing passageway 11, and then the preset gas (e.g., nitrogen) may flow into the first outlet line 42 through the fifth valve port 32 and the fourth valve port 31 of the second valve block 30 in sequence. The target gas (for example, a mixed gas) may flow from the second inlet pipe 51 into the first valve block 20 through the third valve port 23, flow from the seventh valve port 24 of the first valve block 20 and the eighth valve port 34 of the second valve block 30 into the second valve block 30, and flow into the second outlet pipe 52 through the sixth valve port 33 of the second valve block 30.

The controller may control the first valve group 20 to communicate the third valve port 23 and the second valve port 22 of the first valve group 20 and the first valve port 21 and the seventh valve port 24 of the first valve group 20 to block the first valve port 21 and the second valve port 22 of the first valve group 20 and the third valve port 23 and the seventh valve port 24 of the first valve group 20, and the controller may control the second valve group 30 to communicate the sixth valve port 33 and the fifth valve port 32 of the second valve group 30 and the fourth valve port 31 and the eighth valve port 34 of the second valve group 30 and the fourth valve port 31 and the fifth valve port 32 of the second valve group 30 and the sixth valve port 33 and the eighth valve port 34 of the second valve group 30. In this state, the second gas line 50 communicates with the dosing passageway 11, the first gas line 40 is blocked from the dosing passageway 11, and a preset gas (e.g., nitrogen) may flow from the first gas inlet line 41 into the first valve block 20 through the first valve port 21, into the second valve block 30 through the seventh valve port 24 of the first valve block 20, the eighth valve port 34 of the second valve block 30, and then into the first gas outlet line 42 through the fourth valve port 31 of the second valve block 30. Also, the target gas (e.g., a certain mixed gas) may flow from the second inlet pipe 51 into the first valve block 20 through the third valve port 23, and flow from the second valve port 22 of the first valve block 20 into the dosing channel 11, and then the target gas (e.g., a certain mixed gas) may flow into the second outlet pipe 52 through the fifth valve port 32 and the sixth valve port 33 of the second valve block 30 in sequence.

As some alternative embodiments of the present application, as shown in fig. 7 and 8, the second port 22 and the seventh port 24 of the first valve group 20 may be communicated through a first pipe 62, the fifth port 32 and the eighth port 34 of the second valve group 30 may be communicated through a second pipe 63, and the dosing channel 11 may be communicated between the first pipe 62 and the second pipe 63.

The controller may control the first valve block 20 to communicate the first valve port 21 and the second valve port 22 of the first valve block 20, and the controller may control the second valve block 30 to communicate the fourth valve port 31 and the fifth valve port 32 of the second valve block 30. In this state, the first air inlet pipe 41, the dosing passageway 11, and the first air outlet pipe 42 are communicated in this order. A preset gas (e.g., nitrogen) may flow from the first inlet line 41 through the first valve port 21 into the first valve block 20 and from the second valve port 22 of the first valve block 20 through the first line 62 into the dosing passageway 11, and then the preset gas (e.g., nitrogen) may flow sequentially through the second line 63, the fifth valve port 32 of the second valve block 30, and the fourth valve port 31 into the first outlet line 42. Also, a target gas (e.g., a certain mixed gas) may flow from the second inlet pipe 51 into the second outlet pipe 52.

The controller may control the first valve group 20 to communicate the third valve port 23 and the seventh valve port 24 of the first valve group 20 to block the first valve port 21 and the second valve port 22 of the first valve group 20, and the controller may control the second valve group 30 to communicate the sixth valve port 33 and the eighth valve port 34 of the second valve group 30 to block the fourth valve port 31 and the fifth valve port 32 of the second valve group 30. In this state, the second gas line 50 communicates with the dosing passageway 11, the first gas line 40 is blocked from the dosing passageway 11, the target gas (e.g., a certain mixed gas) may flow from the second gas inlet line 51 into the first valve block 20 through the third valve port 23, and from the seventh valve port 24 of the first valve block 20 into the dosing passageway 11 through the first line 62, and then the target gas (e.g., a certain mixed gas) may flow into the second gas outlet line 52 through the second line 63, the eighth valve port 34 of the second valve block 30, and the sixth valve port 33 in this order.

This arrangement also allows mixing of the quantitative preset gas in the quantitative passage 11 and the target gas in the second gas line 50.

In some embodiments of the present utility model, as shown in fig. 5-8, the first valve block 20 may include one four-way valve 26 or two-way valves 27, and the second valve block 30 may include one four-way valve 26 or two-way valves 27.

As some alternative embodiments of the present application, as shown in fig. 5 and 6, the first valve block 20 may include a four-way valve 26, the four-way valve 26 included in the first valve block 20 may have a first port 21, a second port 22, a third port 23, and a seventh port 24, the second valve block 30 may include a four-way valve 26, and the four-way valve 26 included in the second valve block 30 may have a fourth port 31, a fifth port 32, a sixth port 33, and an eighth port 34. By the arrangement of the two four-way valves 26, the quantitative preset gas and the target gas in the quantitative passage 11 can be mixed, and the flow stability of the gas can be maintained.

As some alternative embodiments of the present application, as shown in fig. 7 and 8, the first valve group 20 may include two-way valves 27, one of the two-way valves 27 included in the first valve group 20 may have a first valve port 21, a second valve port 22, and the other may have a third valve port 23 and a seventh valve port 24, where the second valve port 22 and the seventh valve port 24 may be directly connected, and the second valve port 22 and the seventh valve port 24 may also be connected through a first pipe 62. The second valve block 30 may include two-way valves 27, and one of the two-way valves 27 included in the second valve block 30 may have a fourth valve port 31 and a fifth valve port 32, and the other may have a sixth valve port 33 and an eighth valve port 34. Wherein the fifth valve port 32 and the eighth valve port 34 may be directly connected, and the fifth valve port 32 and the eighth valve port 34 may also be connected through the second pipe 63. This arrangement allows mixing the quantitative preset gas and the target gas in the quantitative passage 11 by the four two-way valves 27, and is advantageous in maintaining the flow stability of the gas.

As some alternative embodiments of the present utility model, the first valve group 20 may include two-way valves 27, the second valve group 30 may include one four-way valve 26, or the second valve group 30 may include two-way valves 27, the first valve group 20 may include one four-way valve 26, and specific interfaces of the two-way valves 27 and the four-way valve 26 may be the same as the above-described forms, which are not repeated herein.

As some alternative embodiments of the present utility model, the three-way valve 25 described in the present utility model may be a two-position three-way valve 25, and the four-way valve 26 described in the present utility model may be a two-position four-way valve 26.

In some embodiments of the present utility model, the first valve block 20 may be configured as a diaphragm valve block, that is, the first valve block 20 may include a three-way valve 25 or a four-way valve 26 or a two-way valve 27, which may be configured as a diaphragm valve. Alternatively, the second valve group 30 may be configured as a diaphragm valve group, that is, the three-way valve 25 or the four-way valve 26 or the two-way valve 27 included in the second valve group 30 may be configured as a diaphragm valve. Alternatively, each of the first and second valve blocks 20 and 30 may be configured as a diaphragm valve, that is, each of the three-way valve 25 or the four-way valve 26 or the two-way valve 27 included in the first and second valve blocks 20 and 30 may be configured as a diaphragm valve. The diaphragm valve can not cause volume mutation of the gas channel in the process of connection and disconnection, is favorable for keeping the stability of gas flow, and has no dead volume problem. By using a diaphragm valve, the reliability of the use of the gas dosing device 100 is advantageously improved.

As some alternative embodiments of the present utility model, the first valve block 20 and/or the second valve block 30 may also be configured as, but not limited to, a gate valve block, a shut-off valve block, a tap valve block, a ball valve block, a butterfly valve, a needle valve block, and the like.

As some alternative embodiments of the present utility model, the three-way valve 25, the four-way valve 26, and the two-way valve 27 described in the present utility model may be configured as solenoid valves.

In some embodiments of the present utility model, as shown in fig. 1-8, the second gas line 50 may further include: the communication pipe 53, the communication pipe 53 may communicate the second inlet pipe 51 and the second outlet pipe 52.

When the first valve group 20 and the second valve group 30 each include one three-way valve 25 (as shown in fig. 1 to 4), the first gas line 40 may be connected to the dosing channel 11 by the first valve group 20 and the second valve group 30 being mated, and in this state, the target gas (for example, a certain mixed gas) in the second gas inlet line 51 may flow into the second gas outlet line 52. By the cooperation of the first valve block 20 and the second valve block 30, the second gas line 50 can be made to communicate with the dosing channel 11, in which state the target gas (for example, a certain mixed gas) can be split, one part enters into the first valve block 20, the other part continues to flow through the communication line 53, and the target gas entering into the first valve block 20 and the target gas continuing to flow through the communication line 53 can be converged at the junction of the second gas outlet line 52 and the communication line 53 to form the convergence and mixing of the gas flows.

When the first valve block 20 and the second valve block 30 each include one four-way valve 26, or the first valve block 20 and the second valve block 30 each include two-way valves 27, or one of the first valve block 20 and the second valve block 30 includes one four-way valve 26 and the other includes two-way valves 27 (as shown in fig. 5 to 8), in this state, the target gas (for example, a certain mixed gas) in the second gas inlet line 51 may be split, one portion enters the first valve block 20, the other portion continues to flow through the communication line 53, and the target gas entering the first valve block 20 and the target gas continuing to flow through the communication line 53 can be converged at the junction of the second gas outlet line 52 and the communication line 53 to form the convergence and mixing of the gas flows.

The arrangement is beneficial to improving the mixing uniformity of quantitative preset gas and target gas. And the volume of the subsequent gas mixing device is reduced.

In some embodiments of the present utility model, as shown in fig. 13 and 14, the gas quantification apparatus 100 may further include: the first cover 60, wherein the body 10 may be formed with the first groove 12, one end of the first groove 12 may be opened, as some alternative embodiments of the present utility model, the first groove 12 may be opened downward (i.e., the first groove 12 may be opened away from the first valve group 20) in the height direction of the gas dosing device 100 (i.e., the Z direction shown in fig. 10), the first cover 60 may be provided to the body 10, and the first cover 60 may close the opened end of the first groove 12 to form the dosing channel 11, in other words, the first cover 60 may define the dosing channel 11 together with the first groove 12. This arrangement can reduce difficulty in forming the dosing channel 11, is advantageous in improving the manufacturing efficiency of the dosing device, and is advantageous in precisely controlling the volume of the dosing channel 11 formed.

The present application proposes a detecting apparatus 200, which may include a plurality of the above-mentioned gas quantifying devices 100, and by forming the body 10 with the first groove 12 and defining the quantifying channel 11 together with the first cover 60 and the first groove 12, it is advantageous to keep the volumes of the quantifying channels 11 of the plurality of gas quantifying devices 100 uniform, to improve the consistency of the test results (for example, the specific surface area test results), and to improve the reliability of the detecting apparatus 200 in use.

As some alternative embodiments of the present application, the first cover 60 may be disposed on the body 10 by, but not limited to, clamping, screwing, etc., or the first cover 60 may be pressed by other structures, so that the first cover 60 is disposed on the body 10.

As some alternative embodiments of the present application, a sealing ring may be provided between the first cover 60 and the body 10 to improve the sealability of the dosing channel 11.

As some alternative embodiments of the present application, as shown in fig. 12 and 13, the gas quantification apparatus 100 may further include: the second cover 61, the body 10 may further be formed with a second groove 13, the open end of the first groove 12 may be located at the bottom wall of the second groove 13, at least part of the structure of the first cover 60 may be located in the second groove 13, the second cover 61 may be disposed on the body 10, and the second cover 61 may be abutted with the first cover 60.

Specifically, the body 10 may be formed with a second groove 13, one end of the second groove 13 may be disposed open, as some alternative embodiments of the present application, in the height direction of the gas dosing device 100 (i.e., the Z direction shown in fig. 10), the second groove 13 may be disposed open toward the lower side (i.e., the second groove 13 may be disposed open toward a direction away from the first valve group 20), the bottom wall of the second groove 13 may be disposed in the height direction of the gas dosing device 100 (i.e., the Z direction shown in fig. 10) and recessed toward the first valve group 20 to form the first groove 12, the opening direction of the first groove 12 and the opening direction of the second groove 13 are the same, and the open end of the first groove 12 may be located at the bottom wall of the second groove 13, at least a portion of the structure of the first cover 60 may be located inside the second groove 13, the first cover 60 may close the opening of the first groove 12 to form the dosing channel 11, the second cover 61 may be disposed to the body 10 by but not limited to be screwed or snapped, and the first cover 61 may be pressed against the first cover 60. For example, the second cover 61 and the body 10 may each be provided with a mounting hole through which a connecting member such as a bolt passes, so that the second cover 61 can be fixed to the body 10 and the second cover 61 can be pressed against the first cover 60. This arrangement can improve the mounting firmness of the first cover 60, reduce the probability of the first cover 60 being separated from the main body 10, and the second cover 61 can provide protection for the first cover 60, and reduce the probability of the first cover 60 being deformed by impact.

In some embodiments of the utility model, as shown in fig. 11, at least a portion of the first gas line 40 may be disposed within the body 10, or at least a portion of the second gas line 50 may be disposed within the body 10, or at least a portion of the first gas line 40 and at least a portion of the second gas line 50 may be disposed within the body 10. This arrangement is advantageous in reducing the volume of the gas quantitative device 100 and miniaturizing the gas quantitative device 100.

A detection apparatus 200 according to an embodiment of the present utility model is described below with reference to fig. 9.

As shown in fig. 9, the detecting apparatus 200 according to the embodiment of the present utility model includes: the gas quantifying apparatuses 100 are each configured to mix a quantified preset gas (e.g., nitrogen) to a target gas (e.g., a certain mixed gas).

The detection apparatus 200 of the present utility model may perform a plurality of sets of tests through the plurality of gas quantifying devices 100, and obtain a plurality of sets of test results. The plurality of gas-metering apparatuses 100 are arranged in sequence in a first direction (i.e., the X direction shown in fig. 9). As some alternative embodiments of the present utility model, a plurality of gas-dosing devices 100 may be sequentially arranged at intervals along the first direction (i.e., the X direction shown in fig. 9). As some alternative embodiments of the present utility model, the plurality of gas-dosing devices 100 may be disposed adjacently in sequence in the first direction (i.e., the X direction shown in fig. 9), and for such embodiments, the plurality of gas-dosing devices 100 may be constructed as a single body, or, as shown in fig. 9, the plurality of gas-dosing devices 100 may be of a split structure.

It should be noted that, the present application may place a plurality of gas quantifying apparatuses 100 in the same space, and may make the plurality of gas quantifying apparatuses 100 at the same ambient temperature, which is favorable for making the temperatures of the plurality of gas quantifying apparatuses 100 tend to be uniform, and reducing the influence of the ambient temperature on the test result. In addition, the plurality of gas quantifying devices 100 are sequentially arranged along the first direction, so that the plurality of gas quantifying devices 100 are mutually adjacent, when the heat generating device of the detection equipment 200 generates heat and affects the gas quantifying device 100, or when the temperature of one gas quantifying device 100 is increased, the gas quantifying device 100 with the increased temperature can quickly transfer the heat to the gas quantifying device 100 adjacent to the gas quantifying device 100, so that the temperatures of the plurality of gas quantifying devices 100 tend to be consistent, the influence of temperature variables on the test result can be reduced, and the accuracy and consistency of the test result are improved.

Each of the gas-metering apparatuses 100 has a target gas inlet 14 (as shown in fig. 10), and the plurality of target gas inlets 14 of the plurality of gas-metering apparatuses 100 are disposed in communication with each other.

As some alternative embodiments of the present application, the target gas inlets 14 of the plurality of gas metering apparatuses 100 may each be in communication with the target gas supply apparatus through a pipe. The arrangement can provide the target gas for the plurality of gas quantifying devices 100 through one target gas supply device, so that the target gases used by a plurality of groups of tests are the same, thereby being beneficial to controlling variables and improving the accuracy and consistency of test results.

As some alternative embodiments of the present application, the target gas inlets 14 of a certain gas quantifying device 100 of the plurality of gas quantifying devices 100 may communicate with the target gas supplying device through a pipe, for example, a plurality of gas quantifying devices 100 arranged in sequence in the first direction, the target gas inlet 14 of one of the two gas quantifying devices 100 located at the outermost edge may communicate with the target gas supplying device through a pipe, and the target gas inlets 14 of any adjacent two gas quantifying devices 100 communicate with each other (it is understood that each of the remaining gas quantifying devices 100 may have at least two target gas inlets 14 except for the two gas quantifying devices 100 located at the outermost edge). The arrangement can also make the target gases used by the multiple groups of tests the same, and can save pipelines, thereby being beneficial to reducing the cost.

Therefore, the plurality of gas quantification devices 100 can be placed in the same space by sequentially arranging the plurality of gas quantification devices 100 along the first direction, the plurality of gas quantification devices 100 can be arranged adjacent to one another, heat can be transferred between the plurality of gas quantification devices 100, and the temperatures of the plurality of gas quantification devices 100 tend to be consistent, so that the temperature consistency of a plurality of groups of tests is guaranteed, the influence of temperature variables on test results is reduced, and the accuracy and consistency of the test results are improved.

As some embodiments of the present utility model, as shown in fig. 9, any two adjacent gas metering apparatuses 100 may be in contact.

As some alternative embodiments of the present utility model, each gas-dosing device 100 may be in contact with an adjacent gas-dosing device 100. As some alternative embodiments of the present utility model, the plurality of gas-dosing devices 100 may be constructed as one piece, i.e., the plurality of gas-dosing devices 100 are one piece. As some alternative embodiments of the present utility model, the plurality of gas-dosing devices 100 may also be of a split construction. The arrangement can enable the heat conduction efficiency between the adjacent gas quantification devices 100 to be high, when the temperature of one gas quantification device 100 is increased, heat can be quickly conducted to other gas quantification devices 100, so that the temperatures of a plurality of gas quantification devices 100 tend to be consistent, the temperature consistency of a plurality of groups of tests is guaranteed, and the accuracy and consistency of test results are improved.

As some embodiments of the present utility model, as shown in fig. 9, any adjacent two gas metering apparatuses 100 may be fixedly connected.

As some alternative embodiments of the present utility model, a plurality of gas metering apparatuses 100 may be fixedly connected in sequence.

As some alternative embodiments of the present application, any adjacent two gas-dosing devices 100 may be constructed as one piece, or, alternatively, a plurality of gas-dosing devices 100 may be constructed as one piece, i.e., a plurality of gas-dosing devices 100 are constructed as one piece.

As some alternative embodiments of the present application, as shown in fig. 9 to 14, the gas-dosing device 100 may have connection flanges 15, the connection flanges 15 may be provided at the ends of the gas-dosing device 100 in the Y direction shown in fig. 9, for example, both ends of the body 10 of the gas-dosing device 100 may be provided with connection flanges 15, and the number of connection flanges 15 may be plural, for example, both ends of the body 10 of the gas-dosing device 100 may be provided with two connection flanges 15, respectively, in the Y direction shown in fig. 9, and the two connection flanges 15 may be provided at intervals in the X direction shown in fig. 9. Each of the connection flanges 15 may have a mounting hole, and two adjacent gas-dosing devices 100 may be fixedly connected together by being engaged with the mounting hole through a bolt, for example, two gas-dosing devices 100 may be respectively provided on both sides of the gas-dosing device 100 in the X direction shown in fig. 9, one of the connection flanges 15 may be connected with the gas-dosing device 100 on one side, and the other connection flange 15 may be connected with the gas-dosing device 100 on the other side.

The arrangement can reduce the probability of relative displacement of the plurality of gas quantification apparatuses 100, improve the use reliability of the detection device 200, reduce the probability of leakage of the pipeline connected with each other among the plurality of gas quantification apparatuses 100 due to the relative displacement of the plurality of gas quantification apparatuses 100, and is beneficial to improving the use safety of the detection device 200.

In some embodiments of the present utility model, the second gas inlet lines 51 of the plurality of gas metering apparatuses 100 may all be in communication with each other through the target gas inlet 14.

As some alternative embodiments of the present utility model, the second air intake pipe 51 of each gas-dosing device 100 may communicate with the target gas inlet 14 of the gas-dosing device 100 in the first direction (i.e., the X direction shown in fig. 9), and the second air intake pipe 51 of each gas-dosing device 100 may communicate with the target gas inlet 14 of one gas-dosing device 100 of the adjacent two gas-dosing devices 100, for example, the second air intake pipe 51 of each gas-dosing device 100 may communicate with the target gas inlet 14 of the gas-dosing device 100 located on the front side of the adjacent two gas-dosing devices 100 (it is to be interpreted that the target gas inlet 14 of the gas-dosing device 100 located on the rearmost side may communicate with the target gas supply device). The arrangement can supply the target gas (for example, a certain mixed gas) to the second gas inlet pipeline 51 of the plurality of gas metering devices 100 through one pipeline, so that the target gases used by a plurality of groups of tests can be the same, and the pipeline can be saved, thereby being beneficial to reducing the cost.

In some embodiments of the present utility model, as shown in fig. 9, each of the gas-dosing devices 100 may include: a conduit 70, the conduit 70 may communicate the second inlet conduit 51 with the target gas inlet 14 of an adjacent gas metering apparatus 100. Specifically, the second air intake pipe 51 of each gas-dosing device 100 may communicate with the target gas inlet 14 of the gas-dosing device 100, and the second air intake pipe 51 of each gas-dosing device 100 may communicate with the communication pipe 70 of the gas-dosing device 100, and the communication pipe 70 of each gas-dosing device 100 may communicate with the target gas inlet 14 of one gas-dosing device 100 of the adjacent two gas-dosing devices 100, for example, the second air intake pipe 51 of each gas-dosing device 100 may communicate with the target gas inlet 14 of the gas-dosing device 100 located on the front side of the adjacent two gas-dosing devices 100. As some alternative embodiments of the present utility model, the conducting pipe 70 and a part of the second air inlet pipe 51 may be extended in the X direction shown in fig. 9, and at least a part of the first air inlet pipe 41 and at least a part of the first air outlet pipe 42 may be extended in the Y direction shown in fig. 9. By providing the conduction pipe 70 and extending the conduction pipe 70 in the X direction shown in fig. 9, the second air intake pipes 51 of the plurality of gas metering apparatuses 100 can be sequentially connected, and the arrangement of the conduction pipe 70 can be made reasonable, which is advantageous for making the structure of the detecting device 200 compact.

In some embodiments of the present utility model, as shown in fig. 10, a seal 16 may be provided at the target gas inlet 14, and the seal 16 may be, but is not limited to, an O-ring, a V-ring, a Y-ring, etc. By providing the seal 16, the air tightness between the plurality of gas metering apparatuses 100 can be improved, and the probability of gas leakage can be reduced.

As some alternative embodiments of the present utility model, as shown in fig. 11, at least a portion of the conduit 70 may be disposed within the body 10, which may be more advantageous in reducing the volume of the gas metering apparatus 100.

As some alternative embodiments of the present utility model, as shown in fig. 10, both the target gas inlet 14 and the connection flange 15 may be provided to the body 10.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

In the description of the utility model, a "first feature" or "second feature" may include one or more of such features.

In the description of the present utility model, "plurality" means two or more.

In the description of the utility model, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by another feature therebetween.

In the description of the utility model, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A gas metering device, comprising:

a body;

the first valve bank and the second valve bank are both arranged on the body;

the quantitative channel is communicated between the first valve bank and the second valve bank, the first valve bank and the second valve bank are communicated with a first gas pipeline, the first valve bank and the second valve bank are communicated with a second gas pipeline, and the first gas pipeline is selectively communicated with the quantitative channel or the second gas pipeline is communicated with the quantitative channel through the cooperation of the first valve bank and the second valve bank.

2. The gas metering device of claim 1, wherein the first gas line comprises a first gas inlet line and a first gas outlet line, the second gas line comprises a second gas inlet line and a second gas outlet line, the first valve block is in communication with the first gas inlet line, the second valve block is in communication with the first gas outlet line, the first valve block is in communication with one of the second gas inlet line and the second gas outlet line, and the second valve block is in communication with the other of the second gas inlet line and the second gas outlet line.

3. The gas metering device of claim 2, wherein the first valve block has a first valve port in communication with the first inlet conduit, a second valve port in communication with one of the second inlet conduit or the second outlet conduit, and a third valve port;

the second valve group is provided with a fourth valve port, a fifth valve port and a sixth valve port, the fourth valve port is communicated with the first air outlet pipeline, the sixth valve port is communicated with the other of the second air inlet pipeline or the second air outlet pipeline, and the quantitative channel is communicated with the second valve port and the fifth valve port.

4. A gas dosing device according to claim 3, wherein the first valve group and the second valve group each comprise a three-way valve.

5. A gas metering device as recited in claim 3, wherein said first valve block further has a seventh valve port, said second valve block further has an eighth valve port, said seventh valve port being in communication with said eighth valve port, said seventh valve port being in selective communication with either said first valve port or said third valve port, said eighth valve port being in selective communication with either said fourth valve port or said sixth valve port.

6. The gas dosing device of claim 5, wherein the first valve block comprises one four-way valve or two-way valves and the second valve block comprises one four-way valve or two-way valves.

7. A gas dosing device according to claim 3, characterized in that the first valve group and/or the second valve group is configured as a diaphragm valve group.

8. The gas dosing device of any one of claims 2-7, wherein the second gas line further comprises: and the communication pipeline is communicated with the second air inlet pipeline and the second air outlet pipeline.

9. The gas dosing device of any one of claims 1-7, further comprising: the body is provided with a first groove body, and the first cover body is arranged on the body and seals the open end of the first groove body to form the quantitative channel.

10. A gas dosing device according to any of claims 1-7, characterized in that at least part of the first gas line and/or at least part of the second gas line is provided within the body.