CN216000162U - Clamp with standard constant flow hole - Google Patents
Clamp with standard constant flow hole Download PDFInfo
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- CN216000162U CN216000162U CN202121631500.7U CN202121631500U CN216000162U CN 216000162 U CN216000162 U CN 216000162U CN 202121631500 U CN202121631500 U CN 202121631500U CN 216000162 U CN216000162 U CN 216000162U
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Abstract
The utility model provides a standard constant-flow-hole clamp which comprises a first clamp part and a second clamp part, wherein intermediate connecting parts are respectively arranged on one axial side of the first clamp part and one axial side of the second clamp part, and the intermediate connecting parts of the first clamp part and the second clamp part are connected together; a constant flow hole clamping channel is arranged at the axle center of the first clamp part and the second clamp part which are connected into a whole; the other axial side of the first clamp part and the other axial side of the second clamp part are handheld operation parts, and the diameter of each handheld operation part is far larger than that of the constant-current hole clamping channel. The fixture of the standard constant flow hole has the advantages of conveniently dismounting the constant flow hole, reducing the depth of the boss of the constant flow hole, enabling the dismounting to be easier and having simple structure.
Description
Technical Field
The utility model relates to an auxiliary calibration tool for a standard constant flow hole, in particular to a clamp for the standard constant flow hole.
Background
The standard Constant Flow Orifice (CFO) for tobacco is used in smoking resistance measuring instrument, ventilation rate measuring instrument, smoking machine drawing curve measuring instrument and other special tobacco detecting instrument and has the main function of making the gas Flow constant. For example, in GB 22838.15-2009 "definition and measurement of ventilation for cigarettes", it is specified that a white standard constant flow orifice is required to produce a constant suction flow of 17.5ml/s at the cigarette filter tip when measuring the ventilation rate. The CFO is a convergent nozzle with a smaller diameter, and can generate accurate flow in a pipeline by utilizing the 'choking' effect of the convergent nozzle, and the diameter of a standard constant flow hole is 8-10 mm.
The tobacco industry calibrates the standard CFO special for tobacco according to JJG (tobacco) 16-2002 Standard constant Current hole calibration Specification for tobacco, and a special clamp is required to clamp the CFO during calibration.
The existing matching fixture is small in size, radially larger than the axial length, thinner in thickness and not easy to detach when the CFO is replaced, and because the CFO is small in size, after an experiment is completed, due to the compression effect of a sealing ring, the CFO is easy to adhere to the end face of the fixture, and the CFO is not easy to pour out.
Therefore, the fixture for the CFO is needed to be invented, so that a laboratory worker can conveniently disassemble the CFO on the premise of ensuring the stability of the flow of the CFO, and the efficiency of CFO installation and disassembly is improved.
In order to solve the above problems, people are always seeking an ideal technical solution.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art, and provides a standard constant-flow hole clamp which is convenient to disassemble and assemble, reduces the depth of a boss of a constant-flow hole, is easier to disassemble and assemble and has a simple structure.
In order to achieve the purpose, the utility model adopts the technical scheme that: the clamp of the standard constant flow hole comprises a first clamp part and a second clamp part, wherein intermediate connecting parts are respectively arranged on one axial side of the first clamp part and one axial side of the second clamp part, and the intermediate connecting parts of the first clamp part and the second clamp part are connected together;
the middle connecting part of the first clamp part and the second clamp part which are connected into a whole is a constant-current hole clamping channel;
the other axial side of the first clamp part and the other axial side of the second clamp part are handheld operation parts, and the diameter of each handheld operation part is larger than that of the constant-flow hole clamping channel.
Basically, the intermediate connecting part of the first clamp part and the intermediate connecting part of the second clamp part are connected together through mutually matched threads.
Basically, the connecting end of the middle connecting part of the first clamp part and the middle connecting part of the second clamp part is provided with a sealing ring.
Basically, the constant current hole centre gripping passageway is the constant current hole centre gripping through-hole of the intermediate junction portion axle center department of locating first anchor clamps portion and second anchor clamps portion, the inside open pore that is greater than constant current hole centre gripping through-hole of diameter that is provided with of the handheld operation portion of first anchor clamps portion and second anchor clamps portion, open pore and constant current hole centre gripping through-hole intercommunication.
Basically, the outer peripheral surface of the handheld operation part is provided with anti-skid grains.
Basically, the structure of the constant-current hole clamping channel part in the middle connecting part of the first clamp part is symmetrical to that of the constant-current hole clamping channel part in the middle connecting part of the second clamp part.
Basically, the constant-flow hole clamping channel part in the middle connecting part of the first clamp part is respectively provided with a constant-flow hole end head accommodating cavity, a neck part and an amplifying straight hole which are sequentially communicated from one axial side to the other axial side.
Basically, in the first clamp part and the second clamp part which are connected into a whole, the two constant flow hole end head accommodating cavities are butted together, and the bottom of the cavity of one constant flow hole end head accommodating cavity is a constant flow hole end part supporting surface.
Basically, the intermediate junction portion of first anchor clamps portion sets up the internal thread, the intermediate junction portion of second anchor clamps portion sets up the external screw thread, the sealing washer is located on the terminal surface of the intermediate junction portion of second anchor clamps portion, the constant current hole centre gripping passageway part of second anchor clamps portion is for holding the main passageway part of constant current hole.
Basically, the first clamp part and the second clamp part are integrally and respectively in a cylindrical boss shape.
Compared with the prior art, the clamp has substantial characteristics and progress, and particularly, the clamp is divided into the first clamp part and the second clamp part which are connected together through the middle connecting part, the diameters of the handheld parts of the first clamp part and the second clamp part are increased, the length of an arm of force is increased, larger moment under the same force is realized, and the constant flow hole is convenient for an experimenter to lock.
Furthermore, compared with a traditional clamp with the longitudinal and deep axial length, the structure has the advantages that the depth of the clamp is short, and the calibrated constant-current hole is taken out more easily.
Furthermore, in order to facilitate the diversification of the use and the installation of the constant-current hole, symmetrical constant-current hole clamping through hole structures are arranged in the first clamp part and the second clamp part, and the orientation of the constant-current hole can be switched and adjusted.
Furthermore, at intermediate junction portion, constitute the constant current hole end that is used for placing the constant current hole by two intermediate junction portions and hold the cavity, can extrude constant current hole end position after the combination and place its pine and take off, guarantee the leakproofness, enable the end position of constant current hole to expose when separating, conveniently take out.
Drawings
FIG. 1 is a schematic cross-sectional view of a standard constant flow orifice fixture of the present invention.
In the figure: 1. a first clamp part; 2. a second clamp portion; 3. an intermediate connecting portion of the first clamp; 4. an intermediate connecting portion of the second clamp; 5. a constant flow orifice clamping channel; 6. a hand-held operation section; 7. a seal ring; 8. opening the hole; 9. a constant flow orifice tip receiving cavity; 10. a neck portion; 11. enlarging the straight hole; 12. a constant flow orifice; 13. a rubber gasket.
Detailed Description
The technical solution of the present invention is further described in detail by the following embodiments.
As shown in fig. 1, a standard constant flow hole clamp comprises a first clamp part 1 and a second clamp part 2, wherein intermediate connecting parts are respectively arranged on one axial side of the first clamp part 1 and one axial side of the second clamp part 2, and the intermediate connecting part 3 of the first clamp part and the intermediate connecting part 4 of the second clamp part are connected together through a threaded structure, wherein the intermediate connecting part of the first clamp part is provided with an internal thread, and the intermediate connecting part of the second clamp part is provided with an external thread.
A constant flow hole clamping channel 5 is arranged at the axle center of the first clamp part 1 and the second clamp part 2 which are connected into a whole;
the axial opposite side of first anchor clamps portion 1 and the axial opposite side of second anchor clamps portion 2 are handheld operation portion, the diameter of handheld operation portion 6 is greater than the diameter of constant current hole centre gripping passageway, and in this embodiment, the diameter of handheld operation portion 6 is 4-6 times of constant current hole centre gripping passageway diameter, and in other embodiments, also can choose bigger multiple for use, be greater than, refer to the situation that is greater than 4 times, for optimizing the result of use, be provided with anti-skidding line on the outer peripheral face of handheld operation portion, can increase frictional force.
In order to avoid air leakage inside the clamping channel of the constant-current hole after connection, a sealing ring 7 is arranged at the connecting end of the middle connecting part 3 of the first clamp part and the middle connecting part 4 of the second clamp part, and the sealing ring is arranged on the end face of the middle connecting part of the second clamp part.
In this embodiment, the first clamp part 1 and the second clamp part 2 are respectively cylindrical bosses, the intermediate connecting part is a part of the boss, the handheld part is a cylindrical part, the constant flow hole clamping channel 5 is specifically a constant flow hole clamping through hole located at the axes of the intermediate connecting part 3 of the first clamp part and the intermediate connecting part 4 of the second clamp part, an open hole 8 with a diameter far larger than that of the constant flow hole clamping through hole is arranged inside the handheld operation parts of the first clamp part and the second clamp part, and the open hole 8 is communicated with the constant flow hole clamping through hole.
Specifically, the constant-flow hole clamping channel part in the middle connecting part of the first clamp part is respectively provided with a constant-flow hole end containing cavity 9, a neck part 10 and an amplifying straight hole 11 which are sequentially communicated from one axial side to the other axial side, the constant-flow hole clamping channel part in the middle connecting part 3 of the first clamp part is structurally symmetrical to the constant-flow hole clamping channel part in the middle connecting part 4 of the second clamp part, and the two constant-flow hole end containing cavities 9 are butted together in the first clamp part and the second clamp part which are connected into a whole.
The constant flow hole 12 is clamped in the middle of the middle connecting part 3 of the first clamp and the middle connecting part 4 of the second clamp through two rubber gaskets 13, the rubber ring is connected with the end faces of the two constant flow hole end containing cavities 9, the end faces tightly push the constant flow hole through radial force, and the placement of the rubber ring is favorable for forming the tightness of an air passage. The constant flow hole clamping channel part of the second clamp part is a main channel part for accommodating the constant flow hole.
The working principle is as follows: the installation process comprises the following steps: and placing the standard constant flow hole into a constant flow hole channel part of the second clamp part, wherein one end with the sealing ring faces to the connecting end, screwing the first clamp part on the second clamp part, ensuring coaxial alignment in the screwing process, and screwing the two clamp parts in opposite directions by an operator to connect the two clamp parts in a screwing mode and compact the sealing ring.
The disassembling process comprises the following steps: and operating the handheld parts of the two clamps to unscrew in a direction opposite to the screwing direction in the installation process, separating the two clamps, and taking the standard constant flow hole out of the constant flow hole channel of the second clamp part.
In other embodiments, the clamp can be integrally a cylinder, the middle connecting part is hidden in the cylinder and is not designed to be in a cylindrical boss structure, and the same purpose can be achieved.
In other embodiments, the main portion of the standard constant flow orifice may also be mounted in the first clamp portion.
Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the utility model or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the utility model as defined by the appended claims.
Claims (10)
1. A standard constant flow hole clamp is characterized in that: the clamping device comprises a first clamping part and a second clamping part, wherein intermediate connecting parts are respectively arranged on one axial side of the first clamping part and one axial side of the second clamping part, and the intermediate connecting parts of the first clamping part and the second clamping part are connected together;
the middle connecting part of the first clamp part and the second clamp part which are connected into a whole is a constant-current hole clamping channel;
the other axial side of the first clamp part and the other axial side of the second clamp part are handheld operation parts, and the diameter of each handheld operation part is larger than that of the constant-flow hole clamping channel.
2. The standard constant flow orifice fixture of claim 1, wherein: the middle connecting part of the first clamp part and the middle connecting part of the second clamp part are connected together through mutually matched threads.
3. The standard constant flow orifice fixture of claim 2, wherein: and a sealing ring is arranged at the connecting end of the middle connecting part of the first clamp part and the middle connecting part of the second clamp part.
4. The standard constant flow orifice fixture of claim 3, wherein: the constant flow hole clamping channel is a constant flow hole clamping through hole arranged at the center of the middle connecting part of the first clamp part and the center of the middle connecting part of the second clamp part, an opening hole with the diameter larger than that of the constant flow hole clamping through hole is arranged inside the handheld operation parts of the first clamp part and the second clamp part, and the opening hole is communicated with the constant flow hole clamping through hole.
5. The standard constant flow orifice fixture of claim 4, wherein: and anti-skid grains are arranged on the peripheral surface of the handheld operation part.
6. The standard constant flow orifice fixture of claim 5, wherein: the structure of the constant-current hole clamping channel part in the middle connecting part of the first clamp part is symmetrical to that of the constant-current hole clamping channel part in the middle connecting part of the second clamp part.
7. The standard constant flow orifice fixture of claim 6, wherein: and a constant-flow hole clamping channel part in the middle connecting part of the first clamp part is respectively provided with a constant-flow hole end head accommodating cavity, a neck part and an amplifying straight hole which are sequentially communicated from one axial side to the other axial side.
8. The standard constant flow orifice fixture of claim 7, wherein: in the first clamp part and the second clamp part which are connected into a whole, the two constant flow hole end head accommodating cavities are butted together, and the bottom of the cavity of one constant flow hole end head accommodating cavity is a constant flow hole end part supporting surface.
9. The standard constant flow orifice fixture of claim 8, wherein: the middle connecting portion of the first clamp portion is provided with an internal thread, the middle connecting portion of the second clamp portion is provided with an external thread, the sealing ring is arranged on the end face of the middle connecting portion of the second clamp portion, and the constant-flow hole clamping channel portion of the second clamp portion is a main channel portion containing a constant-flow hole.
10. The standard constant flow orifice fixture of claim 9, wherein: the first clamp part and the second clamp part are integrally and respectively in a cylindrical boss shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121631500.7U CN216000162U (en) | 2021-07-19 | 2021-07-19 | Clamp with standard constant flow hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121631500.7U CN216000162U (en) | 2021-07-19 | 2021-07-19 | Clamp with standard constant flow hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216000162U true CN216000162U (en) | 2022-03-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121631500.7U Active CN216000162U (en) | 2021-07-19 | 2021-07-19 | Clamp with standard constant flow hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216000162U (en) |
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2021
- 2021-07-19 CN CN202121631500.7U patent/CN216000162U/en active Active
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