CN209745634U - Self-pressure-relief gas sampler with four-way valve - Google Patents
Self-pressure-relief gas sampler with four-way valve Download PDFInfo
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- CN209745634U CN209745634U CN201821613543.0U CN201821613543U CN209745634U CN 209745634 U CN209745634 U CN 209745634U CN 201821613543 U CN201821613543 U CN 201821613543U CN 209745634 U CN209745634 U CN 209745634U
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Abstract
the utility model discloses a from pressure release gas sampling ware with cross valve, including the double-end steel bottle, cross valve and three branch roads: the three branches are respectively a branch I, a branch II and a branch III; one end of the first branch is provided with an inlet flange, and the other end of the first branch is connected with a first external connector of the four-way valve; the double-end steel cylinder is arranged on the second branch, a sample inlet pipe emptying stop valve is arranged at the position of the double-end steel cylinder close to the sample inlet end of the double-end steel cylinder, and a sample outlet pipe emptying stop valve is arranged at the position of the double-end steel cylinder close to the sample outlet end of the double-end steel cylinder; meanwhile, two ends of the second branch are respectively and correspondingly connected with a second external connector of the four-way valve and a fourth external connector of the four-way valve; and one end of the third branch is provided with an outlet flange, the other end of the third branch is connected with a third external connector of the four-way valve, and the third branch is provided with a stock layout valve. Therefore, the sampler simplifies the operation steps, reduces the operation difficulty and eliminates the potential safety hazard.
Description
Technical Field
The utility model relates to a sample thief, especially a from airtight sample thief of pressure release with cross valve is applicable to poisonous and harmful, flammable and explosive, the gaseous sampling that needs airtight sample.
background
In the petrochemical plant, sampling of various toxic, harmful, inflammable, explosive and other dangerous medium and low pressure gases is required to be executed strictly according to the specification and operation of SH0233-92 'sampling method for liquefied petroleum gas'. At present, the structure of the closed sampler meeting the requirements is shown in figure 1, and the closed sampler comprises a double-end steel cylinder, wherein two ends of the double-end steel cylinder are respectively provided with a connecting pipe, a straight-through valve is arranged on the connecting pipe at one end of the double-end steel cylinder, and an explosion-proof valve is arranged on the connecting pipe at the other end of the double-end steel cylinder; in addition, a connecting pipe at one end of the double-end steel cylinder is connected with one end of a sampling pipeline a through a pipeline joint b, and the other end of the sampling pipeline a is provided with a pipeline joint a; the connecting pipe at the other end of the double-end steel cylinder is connected with one end of a sampling pipeline b through a pipeline connector c, and the other end of the sampling pipeline b is provided with a pipeline connector d. Therefore, the closed sampler is adopted for sampling, gas can be reserved in the sampling pipeline a and the sampling pipeline b after sampling is finished, the gas is generally directly discharged, the environment-friendly requirement is not met, and meanwhile, potential safety hazards exist.
Disclosure of Invention
The utility model discloses to prior art's not enough, provide a from airtight sample thief of pressure release, it can simplify the operating procedure, reduces the operation degree of difficulty, eliminates the potential safety hazard, environmental protection safety.
In order to achieve the technical purpose, the utility model adopts the following technical proposal:
A self-pressure-release gas sampler with a four-way valve comprises a double-end steel cylinder, and is characterized by further comprising the four-way valve and three branches, wherein the three branches are a first branch, a second branch and a third branch respectively; the four external interfaces of the four-way valve are respectively an external interface I, an external interface II, an external interface III and an external interface IV; one end of the first branch is provided with an inlet flange, and the other end of the first branch is connected with a first external connector of the four-way valve; the double-end steel cylinder is arranged on the second branch, a sample inlet pipe emptying stop valve is arranged at the position of the double-end steel cylinder close to the sample inlet end of the double-end steel cylinder, and a sample outlet pipe emptying stop valve is arranged at the position of the double-end steel cylinder close to the sample outlet end of the double-end steel cylinder; meanwhile, two ends of the second branch are respectively and correspondingly connected with a second external connector of the four-way valve and a fourth external connector of the four-way valve; one end of the third branch is provided with an outlet flange, the other end of the third branch is connected with a third external connector of the four-way valve, and the third branch is provided with a sample discharge valve; when the channel between the first external connector of the four-way valve and the second external connector is conducted, the channel between the third external connector of the four-way valve and the fourth external connector can be simultaneously conducted;
When the external interface I and the external interface IV of the four-way valve are both in a cut-off state, a channel between the external interface III and the external interface II of the four-way valve can be conducted;
When the first external connector and the second external connector of the four-way valve are both in a cut-off state, a channel between the third external connector and the fourth external connector of the four-way valve can be conducted.
as a further improvement of the utility model, a safety explosion-proof valve is installed on the branch.
as a further improvement of the utility model, the sample inlet pipe emptying stop valve and the sample outlet pipe emptying stop valve are needle valves.
as a further improvement of the utility model, the stock layout valve is a check valve.
According to foretell technical scheme, for prior art, the utility model has the advantages of as follows:
the operation steps are simplified, and 2 actions of one four-way valve are used for completing the opening and closing of an inlet pipeline, the opening and closing of an outlet pipeline and the opening and closing of a pressure relief pipeline. The operation difficulty is reduced. In addition, the four-way valve controls the inlet and outlet pipelines and the pressure relief pipeline simultaneously, so that the problem that pressure relief cannot be completed due to step errors is avoided, and high-pressure gas (particularly liquefied gas) is stored in the pipeline, so that potential safety hazards are formed.
drawings
FIG. 1 is a schematic diagram of a prior art hermetic sampler;
In fig. 1: 1' -a double-ended steel cylinder; 2' -a straight-through valve; 3' -explosion-proof valves; 41' -sampling line a; 42' -sampling line b; 51' -line connector a; 52' -pipeline joint b; 53' -line connection c; 54' -line connection d;
FIG. 2 is a schematic structural diagram of the closed sampler of the present invention;
In the figure: 1-a four-way valve; 2-a stock-out valve; 3-double-head steel cylinder; 4-a sample inlet pipe emptying stop valve; and 5, emptying the stop valve by a sample outlet pipe.
Detailed Description
the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention. Unless specifically stated otherwise, the relative arrangement of the components and steps, expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may also be oriented in other different ways (rotated 90 degrees or at other orientations).
the self-pressure-release gas sampler with the four-way valve of the utility model comprises a double-head steel cylinder, a four-way valve and three branches as shown in figure 2, wherein the three branches are a branch I, a branch II and a branch III respectively; the four external interfaces of the four-way valve are respectively an external interface I, an external interface II, an external interface III and an external interface IV; one end of the first branch is provided with an inlet flange, and the other end of the first branch is connected with a first external connector of the four-way valve; the double-end steel cylinder is arranged on the second branch, a sample inlet pipe emptying stop valve is arranged at the position of the double-end steel cylinder close to the sample inlet end of the double-end steel cylinder, and a sample outlet pipe emptying stop valve is arranged at the position of the double-end steel cylinder close to the sample outlet end of the double-end steel cylinder; meanwhile, two ends of the second branch are respectively and correspondingly connected with a second external connector of the four-way valve and a fourth external connector of the four-way valve; and one end of the third branch is provided with an outlet flange, the other end of the third branch is connected with a third external connector of the four-way valve, and the third branch is provided with a stock layout valve.
And a safety explosion-proof valve is arranged on the branch II.
The sample inlet pipe emptying stop valve and the sample outlet pipe emptying stop valve are needle valves.
The stock discharge valve is a one-way valve.
According to the above technical scheme, the utility model discloses a work flow as follows:
1. The needle valve and the double-head steel cylinder are connected to a pipeline, and the sample inlet pipe emptying stop valve and the sample outlet pipe emptying stop valve are in a closed state. At this time, the four-way valve is in the 1 st position (the first external connector is closed, the fourth external connector is closed, and the channel between the second external connector and the third external connector is communicated).
2. And rotating the four-way valve to the 2 nd position (the channel between the first external connector and the second external connector is communicated, and the channel between the third external connector and the fourth external connector is communicated), wherein the channel between the first external connector and the second external connector of the inlet gas is communicated to the emptying stop valve of the sample inlet pipe.
3. And opening the sample inlet pipe emptying stop valve and the sample outlet pipe emptying stop valve respectively, wherein the gas flows through a channel between the steel cylinder and the external connector III and the external connector IV of the four-way valve and the one-way valve to enter a torch pipeline.
4. and after a period of circulation, closing the sample outlet pipe emptying stop valve. At this point the cylinder is filled with a fresh gas sample. And after the sample outlet pipe is emptied of the stop valve, the gas in the pipeline is decompressed and enters a torch pipeline.
5. The sample inlet evacuation shut-off valve is closed and the four-way valve is then rotated to position 1. And the inlet pipeline returns to the initial state again, and the gas between the sampling pipe emptying stop valve and the external interface II of the four-way valve is decompressed through a channel between the external interface II and the external interface III and the one-way valve to enter the torch pipeline.
6. after the steps, the front pipeline and the rear pipeline of the steel cylinder are decompressed, and at the moment, the steel cylinder is a fresh gas sample, and the steel cylinder and the needle valve are taken away. (the pipeline is connected with the needle valve through a self-sealing quick joint, so that the pipeline is automatically sealed after the steel cylinder and the needle valve are taken away).
the cross valve can select the current commonly used circulation valve, adopts four external interfaces therein, and adopts the end cap to block up two remaining external interfaces.
Claims (4)
1. a self-pressure-release gas sampler with a four-way valve comprises a double-end steel cylinder, and is characterized by further comprising the four-way valve and three branches, wherein the three branches are a first branch, a second branch and a third branch respectively; the four external interfaces of the four-way valve are respectively an external interface I, an external interface II, an external interface III and an external interface IV; wherein:
One end of the first branch is provided with an inlet flange, and the other end of the first branch is connected with a first external connector of the four-way valve;
Two ends of the branch II are respectively and correspondingly connected with an external interface II of the four-way valve and an external interface IV of the four-way valve;
the double-end steel cylinder is arranged on the second branch, a sample inlet pipe emptying stop valve is arranged at the position of the double-end steel cylinder close to the sample inlet end of the double-end steel cylinder, and a sample outlet pipe emptying stop valve is arranged at the position of the double-end steel cylinder close to the sample outlet end of the double-end steel cylinder;
One end of the third branch is provided with an outlet flange, the other end of the third branch is connected with a third external connector of the four-way valve, and the third branch is provided with a sample discharge valve;
When the channel between the first external connector of the four-way valve and the second external connector is conducted, the channel between the third external connector of the four-way valve and the fourth external connector can be simultaneously conducted;
When the external interface I and the external interface IV of the four-way valve are both in a cut-off state, a channel between the external interface III and the external interface II of the four-way valve can be conducted;
When the first external connector and the second external connector of the four-way valve are both in a cut-off state, a channel between the third external connector and the fourth external connector of the four-way valve can be conducted.
2. The self-venting gas sampler with a four-way valve as recited in claim 1, wherein the sample discharge valve is a one-way valve.
3. The self-venting gas sampler with a four-way valve as claimed in claim 1 wherein a safety explosion-proof valve is mounted on the second branch.
4. The self-venting gas sampler with a four-way valve as claimed in claim 1 wherein the sample inlet pipe evacuation stop valve and the sample outlet pipe evacuation stop valve are needle valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821613543.0U CN209745634U (en) | 2018-09-30 | 2018-09-30 | Self-pressure-relief gas sampler with four-way valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821613543.0U CN209745634U (en) | 2018-09-30 | 2018-09-30 | Self-pressure-relief gas sampler with four-way valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209745634U true CN209745634U (en) | 2019-12-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821613543.0U Active CN209745634U (en) | 2018-09-30 | 2018-09-30 | Self-pressure-relief gas sampler with four-way valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209745634U (en) |
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2018
- 2018-09-30 CN CN201821613543.0U patent/CN209745634U/en active Active
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